| 1 | /* |
| 2 | * fs/nfs/nfs4proc.c |
| 3 | * |
| 4 | * Client-side procedure declarations for NFSv4. |
| 5 | * |
| 6 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Kendrick Smith <kmsmith@umich.edu> |
| 10 | * Andy Adamson <andros@umich.edu> |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in the |
| 20 | * documentation and/or other materials provided with the distribution. |
| 21 | * 3. Neither the name of the University nor the names of its |
| 22 | * contributors may be used to endorse or promote products derived |
| 23 | * from this software without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include <linux/errno.h> |
| 41 | #include <linux/string.h> |
| 42 | #include <linux/ratelimit.h> |
| 43 | #include <linux/printk.h> |
| 44 | #include <linux/slab.h> |
| 45 | #include <linux/sunrpc/clnt.h> |
| 46 | #include <linux/sunrpc/gss_api.h> |
| 47 | #include <linux/nfs.h> |
| 48 | #include <linux/nfs4.h> |
| 49 | #include <linux/nfs_fs.h> |
| 50 | #include <linux/nfs_page.h> |
| 51 | #include <linux/nfs_mount.h> |
| 52 | #include <linux/namei.h> |
| 53 | #include <linux/mount.h> |
| 54 | #include <linux/module.h> |
| 55 | #include <linux/sunrpc/bc_xprt.h> |
| 56 | #include <linux/xattr.h> |
| 57 | #include <linux/utsname.h> |
| 58 | |
| 59 | #include "nfs4_fs.h" |
| 60 | #include "delegation.h" |
| 61 | #include "internal.h" |
| 62 | #include "iostat.h" |
| 63 | #include "callback.h" |
| 64 | #include "pnfs.h" |
| 65 | |
| 66 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 67 | |
| 68 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
| 69 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
| 70 | |
| 71 | #define NFS4_MAX_LOOP_ON_RECOVER (10) |
| 72 | |
| 73 | struct nfs4_opendata; |
| 74 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
| 75 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
| 76 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
| 77 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
| 78 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
| 79 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| 80 | struct nfs_fattr *fattr, struct iattr *sattr, |
| 81 | struct nfs4_state *state); |
| 82 | #ifdef CONFIG_NFS_V4_1 |
| 83 | static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *); |
| 84 | static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *); |
| 85 | #endif |
| 86 | /* Prevent leaks of NFSv4 errors into userland */ |
| 87 | static int nfs4_map_errors(int err) |
| 88 | { |
| 89 | if (err >= -1000) |
| 90 | return err; |
| 91 | switch (err) { |
| 92 | case -NFS4ERR_RESOURCE: |
| 93 | return -EREMOTEIO; |
| 94 | case -NFS4ERR_WRONGSEC: |
| 95 | return -EPERM; |
| 96 | case -NFS4ERR_BADOWNER: |
| 97 | case -NFS4ERR_BADNAME: |
| 98 | return -EINVAL; |
| 99 | default: |
| 100 | dprintk("%s could not handle NFSv4 error %d\n", |
| 101 | __func__, -err); |
| 102 | break; |
| 103 | } |
| 104 | return -EIO; |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * This is our standard bitmap for GETATTR requests. |
| 109 | */ |
| 110 | const u32 nfs4_fattr_bitmap[2] = { |
| 111 | FATTR4_WORD0_TYPE |
| 112 | | FATTR4_WORD0_CHANGE |
| 113 | | FATTR4_WORD0_SIZE |
| 114 | | FATTR4_WORD0_FSID |
| 115 | | FATTR4_WORD0_FILEID, |
| 116 | FATTR4_WORD1_MODE |
| 117 | | FATTR4_WORD1_NUMLINKS |
| 118 | | FATTR4_WORD1_OWNER |
| 119 | | FATTR4_WORD1_OWNER_GROUP |
| 120 | | FATTR4_WORD1_RAWDEV |
| 121 | | FATTR4_WORD1_SPACE_USED |
| 122 | | FATTR4_WORD1_TIME_ACCESS |
| 123 | | FATTR4_WORD1_TIME_METADATA |
| 124 | | FATTR4_WORD1_TIME_MODIFY |
| 125 | }; |
| 126 | |
| 127 | const u32 nfs4_statfs_bitmap[2] = { |
| 128 | FATTR4_WORD0_FILES_AVAIL |
| 129 | | FATTR4_WORD0_FILES_FREE |
| 130 | | FATTR4_WORD0_FILES_TOTAL, |
| 131 | FATTR4_WORD1_SPACE_AVAIL |
| 132 | | FATTR4_WORD1_SPACE_FREE |
| 133 | | FATTR4_WORD1_SPACE_TOTAL |
| 134 | }; |
| 135 | |
| 136 | const u32 nfs4_pathconf_bitmap[2] = { |
| 137 | FATTR4_WORD0_MAXLINK |
| 138 | | FATTR4_WORD0_MAXNAME, |
| 139 | 0 |
| 140 | }; |
| 141 | |
| 142 | const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE |
| 143 | | FATTR4_WORD0_MAXREAD |
| 144 | | FATTR4_WORD0_MAXWRITE |
| 145 | | FATTR4_WORD0_LEASE_TIME, |
| 146 | FATTR4_WORD1_TIME_DELTA |
| 147 | | FATTR4_WORD1_FS_LAYOUT_TYPES, |
| 148 | FATTR4_WORD2_LAYOUT_BLKSIZE |
| 149 | }; |
| 150 | |
| 151 | const u32 nfs4_fs_locations_bitmap[2] = { |
| 152 | FATTR4_WORD0_TYPE |
| 153 | | FATTR4_WORD0_CHANGE |
| 154 | | FATTR4_WORD0_SIZE |
| 155 | | FATTR4_WORD0_FSID |
| 156 | | FATTR4_WORD0_FILEID |
| 157 | | FATTR4_WORD0_FS_LOCATIONS, |
| 158 | FATTR4_WORD1_MODE |
| 159 | | FATTR4_WORD1_NUMLINKS |
| 160 | | FATTR4_WORD1_OWNER |
| 161 | | FATTR4_WORD1_OWNER_GROUP |
| 162 | | FATTR4_WORD1_RAWDEV |
| 163 | | FATTR4_WORD1_SPACE_USED |
| 164 | | FATTR4_WORD1_TIME_ACCESS |
| 165 | | FATTR4_WORD1_TIME_METADATA |
| 166 | | FATTR4_WORD1_TIME_MODIFY |
| 167 | | FATTR4_WORD1_MOUNTED_ON_FILEID |
| 168 | }; |
| 169 | |
| 170 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
| 171 | struct nfs4_readdir_arg *readdir) |
| 172 | { |
| 173 | __be32 *start, *p; |
| 174 | |
| 175 | BUG_ON(readdir->count < 80); |
| 176 | if (cookie > 2) { |
| 177 | readdir->cookie = cookie; |
| 178 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | readdir->cookie = 0; |
| 183 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
| 184 | if (cookie == 2) |
| 185 | return; |
| 186 | |
| 187 | /* |
| 188 | * NFSv4 servers do not return entries for '.' and '..' |
| 189 | * Therefore, we fake these entries here. We let '.' |
| 190 | * have cookie 0 and '..' have cookie 1. Note that |
| 191 | * when talking to the server, we always send cookie 0 |
| 192 | * instead of 1 or 2. |
| 193 | */ |
| 194 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
| 195 | |
| 196 | if (cookie == 0) { |
| 197 | *p++ = xdr_one; /* next */ |
| 198 | *p++ = xdr_zero; /* cookie, first word */ |
| 199 | *p++ = xdr_one; /* cookie, second word */ |
| 200 | *p++ = xdr_one; /* entry len */ |
| 201 | memcpy(p, ".\0\0\0", 4); /* entry */ |
| 202 | p++; |
| 203 | *p++ = xdr_one; /* bitmap length */ |
| 204 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 205 | *p++ = htonl(8); /* attribute buffer length */ |
| 206 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
| 207 | } |
| 208 | |
| 209 | *p++ = xdr_one; /* next */ |
| 210 | *p++ = xdr_zero; /* cookie, first word */ |
| 211 | *p++ = xdr_two; /* cookie, second word */ |
| 212 | *p++ = xdr_two; /* entry len */ |
| 213 | memcpy(p, "..\0\0", 4); /* entry */ |
| 214 | p++; |
| 215 | *p++ = xdr_one; /* bitmap length */ |
| 216 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 217 | *p++ = htonl(8); /* attribute buffer length */ |
| 218 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
| 219 | |
| 220 | readdir->pgbase = (char *)p - (char *)start; |
| 221 | readdir->count -= readdir->pgbase; |
| 222 | kunmap_atomic(start, KM_USER0); |
| 223 | } |
| 224 | |
| 225 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| 226 | { |
| 227 | int res; |
| 228 | |
| 229 | might_sleep(); |
| 230 | |
| 231 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| 232 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 233 | return res; |
| 234 | } |
| 235 | |
| 236 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| 237 | { |
| 238 | int res = 0; |
| 239 | |
| 240 | might_sleep(); |
| 241 | |
| 242 | if (*timeout <= 0) |
| 243 | *timeout = NFS4_POLL_RETRY_MIN; |
| 244 | if (*timeout > NFS4_POLL_RETRY_MAX) |
| 245 | *timeout = NFS4_POLL_RETRY_MAX; |
| 246 | schedule_timeout_killable(*timeout); |
| 247 | if (fatal_signal_pending(current)) |
| 248 | res = -ERESTARTSYS; |
| 249 | *timeout <<= 1; |
| 250 | return res; |
| 251 | } |
| 252 | |
| 253 | /* This is the error handling routine for processes that are allowed |
| 254 | * to sleep. |
| 255 | */ |
| 256 | static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
| 257 | { |
| 258 | struct nfs_client *clp = server->nfs_client; |
| 259 | struct nfs4_state *state = exception->state; |
| 260 | int ret = errorcode; |
| 261 | |
| 262 | exception->retry = 0; |
| 263 | switch(errorcode) { |
| 264 | case 0: |
| 265 | return 0; |
| 266 | case -NFS4ERR_ADMIN_REVOKED: |
| 267 | case -NFS4ERR_BAD_STATEID: |
| 268 | case -NFS4ERR_OPENMODE: |
| 269 | if (state == NULL) |
| 270 | break; |
| 271 | nfs4_schedule_stateid_recovery(server, state); |
| 272 | goto wait_on_recovery; |
| 273 | case -NFS4ERR_EXPIRED: |
| 274 | if (state != NULL) |
| 275 | nfs4_schedule_stateid_recovery(server, state); |
| 276 | case -NFS4ERR_STALE_STATEID: |
| 277 | case -NFS4ERR_STALE_CLIENTID: |
| 278 | nfs4_schedule_lease_recovery(clp); |
| 279 | goto wait_on_recovery; |
| 280 | #if defined(CONFIG_NFS_V4_1) |
| 281 | case -NFS4ERR_BADSESSION: |
| 282 | case -NFS4ERR_BADSLOT: |
| 283 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 284 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 285 | case -NFS4ERR_DEADSESSION: |
| 286 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 287 | case -NFS4ERR_SEQ_MISORDERED: |
| 288 | dprintk("%s ERROR: %d Reset session\n", __func__, |
| 289 | errorcode); |
| 290 | nfs4_schedule_session_recovery(clp->cl_session); |
| 291 | exception->retry = 1; |
| 292 | break; |
| 293 | #endif /* defined(CONFIG_NFS_V4_1) */ |
| 294 | case -NFS4ERR_FILE_OPEN: |
| 295 | if (exception->timeout > HZ) { |
| 296 | /* We have retried a decent amount, time to |
| 297 | * fail |
| 298 | */ |
| 299 | ret = -EBUSY; |
| 300 | break; |
| 301 | } |
| 302 | case -NFS4ERR_GRACE: |
| 303 | case -NFS4ERR_DELAY: |
| 304 | case -EKEYEXPIRED: |
| 305 | ret = nfs4_delay(server->client, &exception->timeout); |
| 306 | if (ret != 0) |
| 307 | break; |
| 308 | case -NFS4ERR_RETRY_UNCACHED_REP: |
| 309 | case -NFS4ERR_OLD_STATEID: |
| 310 | exception->retry = 1; |
| 311 | break; |
| 312 | case -NFS4ERR_BADOWNER: |
| 313 | /* The following works around a Linux server bug! */ |
| 314 | case -NFS4ERR_BADNAME: |
| 315 | if (server->caps & NFS_CAP_UIDGID_NOMAP) { |
| 316 | server->caps &= ~NFS_CAP_UIDGID_NOMAP; |
| 317 | exception->retry = 1; |
| 318 | printk(KERN_WARNING "NFS: v4 server %s " |
| 319 | "does not accept raw " |
| 320 | "uid/gids. " |
| 321 | "Reenabling the idmapper.\n", |
| 322 | server->nfs_client->cl_hostname); |
| 323 | } |
| 324 | } |
| 325 | /* We failed to handle the error */ |
| 326 | return nfs4_map_errors(ret); |
| 327 | wait_on_recovery: |
| 328 | ret = nfs4_wait_clnt_recover(clp); |
| 329 | if (ret == 0) |
| 330 | exception->retry = 1; |
| 331 | return ret; |
| 332 | } |
| 333 | |
| 334 | |
| 335 | static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
| 336 | { |
| 337 | spin_lock(&clp->cl_lock); |
| 338 | if (time_before(clp->cl_last_renewal,timestamp)) |
| 339 | clp->cl_last_renewal = timestamp; |
| 340 | spin_unlock(&clp->cl_lock); |
| 341 | } |
| 342 | |
| 343 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
| 344 | { |
| 345 | do_renew_lease(server->nfs_client, timestamp); |
| 346 | } |
| 347 | |
| 348 | #if defined(CONFIG_NFS_V4_1) |
| 349 | |
| 350 | /* |
| 351 | * nfs4_free_slot - free a slot and efficiently update slot table. |
| 352 | * |
| 353 | * freeing a slot is trivially done by clearing its respective bit |
| 354 | * in the bitmap. |
| 355 | * If the freed slotid equals highest_used_slotid we want to update it |
| 356 | * so that the server would be able to size down the slot table if needed, |
| 357 | * otherwise we know that the highest_used_slotid is still in use. |
| 358 | * When updating highest_used_slotid there may be "holes" in the bitmap |
| 359 | * so we need to scan down from highest_used_slotid to 0 looking for the now |
| 360 | * highest slotid in use. |
| 361 | * If none found, highest_used_slotid is set to -1. |
| 362 | * |
| 363 | * Must be called while holding tbl->slot_tbl_lock |
| 364 | */ |
| 365 | static void |
| 366 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) |
| 367 | { |
| 368 | int slotid = free_slotid; |
| 369 | |
| 370 | BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE); |
| 371 | /* clear used bit in bitmap */ |
| 372 | __clear_bit(slotid, tbl->used_slots); |
| 373 | |
| 374 | /* update highest_used_slotid when it is freed */ |
| 375 | if (slotid == tbl->highest_used_slotid) { |
| 376 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); |
| 377 | if (slotid < tbl->max_slots) |
| 378 | tbl->highest_used_slotid = slotid; |
| 379 | else |
| 380 | tbl->highest_used_slotid = -1; |
| 381 | } |
| 382 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, |
| 383 | free_slotid, tbl->highest_used_slotid); |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * Signal state manager thread if session fore channel is drained |
| 388 | */ |
| 389 | static void nfs4_check_drain_fc_complete(struct nfs4_session *ses) |
| 390 | { |
| 391 | struct rpc_task *task; |
| 392 | |
| 393 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
| 394 | task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); |
| 395 | if (task) |
| 396 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 397 | return; |
| 398 | } |
| 399 | |
| 400 | if (ses->fc_slot_table.highest_used_slotid != -1) |
| 401 | return; |
| 402 | |
| 403 | dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__); |
| 404 | complete(&ses->fc_slot_table.complete); |
| 405 | } |
| 406 | |
| 407 | /* |
| 408 | * Signal state manager thread if session back channel is drained |
| 409 | */ |
| 410 | void nfs4_check_drain_bc_complete(struct nfs4_session *ses) |
| 411 | { |
| 412 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) || |
| 413 | ses->bc_slot_table.highest_used_slotid != -1) |
| 414 | return; |
| 415 | dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__); |
| 416 | complete(&ses->bc_slot_table.complete); |
| 417 | } |
| 418 | |
| 419 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
| 420 | { |
| 421 | struct nfs4_slot_table *tbl; |
| 422 | |
| 423 | tbl = &res->sr_session->fc_slot_table; |
| 424 | if (!res->sr_slot) { |
| 425 | /* just wake up the next guy waiting since |
| 426 | * we may have not consumed a slot after all */ |
| 427 | dprintk("%s: No slot\n", __func__); |
| 428 | return; |
| 429 | } |
| 430 | |
| 431 | spin_lock(&tbl->slot_tbl_lock); |
| 432 | nfs4_free_slot(tbl, res->sr_slot - tbl->slots); |
| 433 | nfs4_check_drain_fc_complete(res->sr_session); |
| 434 | spin_unlock(&tbl->slot_tbl_lock); |
| 435 | res->sr_slot = NULL; |
| 436 | } |
| 437 | |
| 438 | static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
| 439 | { |
| 440 | unsigned long timestamp; |
| 441 | struct nfs_client *clp; |
| 442 | |
| 443 | /* |
| 444 | * sr_status remains 1 if an RPC level error occurred. The server |
| 445 | * may or may not have processed the sequence operation.. |
| 446 | * Proceed as if the server received and processed the sequence |
| 447 | * operation. |
| 448 | */ |
| 449 | if (res->sr_status == 1) |
| 450 | res->sr_status = NFS_OK; |
| 451 | |
| 452 | /* don't increment the sequence number if the task wasn't sent */ |
| 453 | if (!RPC_WAS_SENT(task)) |
| 454 | goto out; |
| 455 | |
| 456 | /* Check the SEQUENCE operation status */ |
| 457 | switch (res->sr_status) { |
| 458 | case 0: |
| 459 | /* Update the slot's sequence and clientid lease timer */ |
| 460 | ++res->sr_slot->seq_nr; |
| 461 | timestamp = res->sr_renewal_time; |
| 462 | clp = res->sr_session->clp; |
| 463 | do_renew_lease(clp, timestamp); |
| 464 | /* Check sequence flags */ |
| 465 | if (res->sr_status_flags != 0) |
| 466 | nfs4_schedule_lease_recovery(clp); |
| 467 | break; |
| 468 | case -NFS4ERR_DELAY: |
| 469 | /* The server detected a resend of the RPC call and |
| 470 | * returned NFS4ERR_DELAY as per Section 2.10.6.2 |
| 471 | * of RFC5661. |
| 472 | */ |
| 473 | dprintk("%s: slot=%td seq=%d: Operation in progress\n", |
| 474 | __func__, |
| 475 | res->sr_slot - res->sr_session->fc_slot_table.slots, |
| 476 | res->sr_slot->seq_nr); |
| 477 | goto out_retry; |
| 478 | default: |
| 479 | /* Just update the slot sequence no. */ |
| 480 | ++res->sr_slot->seq_nr; |
| 481 | } |
| 482 | out: |
| 483 | /* The session may be reset by one of the error handlers. */ |
| 484 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); |
| 485 | nfs41_sequence_free_slot(res); |
| 486 | return 1; |
| 487 | out_retry: |
| 488 | if (!rpc_restart_call(task)) |
| 489 | goto out; |
| 490 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static int nfs4_sequence_done(struct rpc_task *task, |
| 495 | struct nfs4_sequence_res *res) |
| 496 | { |
| 497 | if (res->sr_session == NULL) |
| 498 | return 1; |
| 499 | return nfs41_sequence_done(task, res); |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * nfs4_find_slot - efficiently look for a free slot |
| 504 | * |
| 505 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. |
| 506 | * If found, we mark the slot as used, update the highest_used_slotid, |
| 507 | * and respectively set up the sequence operation args. |
| 508 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. |
| 509 | * |
| 510 | * Note: must be called with under the slot_tbl_lock. |
| 511 | */ |
| 512 | static u8 |
| 513 | nfs4_find_slot(struct nfs4_slot_table *tbl) |
| 514 | { |
| 515 | int slotid; |
| 516 | u8 ret_id = NFS4_MAX_SLOT_TABLE; |
| 517 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); |
| 518 | |
| 519 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
| 520 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, |
| 521 | tbl->max_slots); |
| 522 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); |
| 523 | if (slotid >= tbl->max_slots) |
| 524 | goto out; |
| 525 | __set_bit(slotid, tbl->used_slots); |
| 526 | if (slotid > tbl->highest_used_slotid) |
| 527 | tbl->highest_used_slotid = slotid; |
| 528 | ret_id = slotid; |
| 529 | out: |
| 530 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", |
| 531 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); |
| 532 | return ret_id; |
| 533 | } |
| 534 | |
| 535 | int nfs41_setup_sequence(struct nfs4_session *session, |
| 536 | struct nfs4_sequence_args *args, |
| 537 | struct nfs4_sequence_res *res, |
| 538 | int cache_reply, |
| 539 | struct rpc_task *task) |
| 540 | { |
| 541 | struct nfs4_slot *slot; |
| 542 | struct nfs4_slot_table *tbl; |
| 543 | u8 slotid; |
| 544 | |
| 545 | dprintk("--> %s\n", __func__); |
| 546 | /* slot already allocated? */ |
| 547 | if (res->sr_slot != NULL) |
| 548 | return 0; |
| 549 | |
| 550 | tbl = &session->fc_slot_table; |
| 551 | |
| 552 | spin_lock(&tbl->slot_tbl_lock); |
| 553 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && |
| 554 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
| 555 | /* The state manager will wait until the slot table is empty */ |
| 556 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| 557 | spin_unlock(&tbl->slot_tbl_lock); |
| 558 | dprintk("%s session is draining\n", __func__); |
| 559 | return -EAGAIN; |
| 560 | } |
| 561 | |
| 562 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
| 563 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
| 564 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| 565 | spin_unlock(&tbl->slot_tbl_lock); |
| 566 | dprintk("%s enforce FIFO order\n", __func__); |
| 567 | return -EAGAIN; |
| 568 | } |
| 569 | |
| 570 | slotid = nfs4_find_slot(tbl); |
| 571 | if (slotid == NFS4_MAX_SLOT_TABLE) { |
| 572 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| 573 | spin_unlock(&tbl->slot_tbl_lock); |
| 574 | dprintk("<-- %s: no free slots\n", __func__); |
| 575 | return -EAGAIN; |
| 576 | } |
| 577 | spin_unlock(&tbl->slot_tbl_lock); |
| 578 | |
| 579 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
| 580 | slot = tbl->slots + slotid; |
| 581 | args->sa_session = session; |
| 582 | args->sa_slotid = slotid; |
| 583 | args->sa_cache_this = cache_reply; |
| 584 | |
| 585 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); |
| 586 | |
| 587 | res->sr_session = session; |
| 588 | res->sr_slot = slot; |
| 589 | res->sr_renewal_time = jiffies; |
| 590 | res->sr_status_flags = 0; |
| 591 | /* |
| 592 | * sr_status is only set in decode_sequence, and so will remain |
| 593 | * set to 1 if an rpc level failure occurs. |
| 594 | */ |
| 595 | res->sr_status = 1; |
| 596 | return 0; |
| 597 | } |
| 598 | EXPORT_SYMBOL_GPL(nfs41_setup_sequence); |
| 599 | |
| 600 | int nfs4_setup_sequence(const struct nfs_server *server, |
| 601 | struct nfs4_sequence_args *args, |
| 602 | struct nfs4_sequence_res *res, |
| 603 | int cache_reply, |
| 604 | struct rpc_task *task) |
| 605 | { |
| 606 | struct nfs4_session *session = nfs4_get_session(server); |
| 607 | int ret = 0; |
| 608 | |
| 609 | if (session == NULL) { |
| 610 | args->sa_session = NULL; |
| 611 | res->sr_session = NULL; |
| 612 | goto out; |
| 613 | } |
| 614 | |
| 615 | dprintk("--> %s clp %p session %p sr_slot %td\n", |
| 616 | __func__, session->clp, session, res->sr_slot ? |
| 617 | res->sr_slot - session->fc_slot_table.slots : -1); |
| 618 | |
| 619 | ret = nfs41_setup_sequence(session, args, res, cache_reply, |
| 620 | task); |
| 621 | out: |
| 622 | dprintk("<-- %s status=%d\n", __func__, ret); |
| 623 | return ret; |
| 624 | } |
| 625 | |
| 626 | struct nfs41_call_sync_data { |
| 627 | const struct nfs_server *seq_server; |
| 628 | struct nfs4_sequence_args *seq_args; |
| 629 | struct nfs4_sequence_res *seq_res; |
| 630 | int cache_reply; |
| 631 | }; |
| 632 | |
| 633 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) |
| 634 | { |
| 635 | struct nfs41_call_sync_data *data = calldata; |
| 636 | |
| 637 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
| 638 | |
| 639 | if (nfs4_setup_sequence(data->seq_server, data->seq_args, |
| 640 | data->seq_res, data->cache_reply, task)) |
| 641 | return; |
| 642 | rpc_call_start(task); |
| 643 | } |
| 644 | |
| 645 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
| 646 | { |
| 647 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 648 | nfs41_call_sync_prepare(task, calldata); |
| 649 | } |
| 650 | |
| 651 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
| 652 | { |
| 653 | struct nfs41_call_sync_data *data = calldata; |
| 654 | |
| 655 | nfs41_sequence_done(task, data->seq_res); |
| 656 | } |
| 657 | |
| 658 | struct rpc_call_ops nfs41_call_sync_ops = { |
| 659 | .rpc_call_prepare = nfs41_call_sync_prepare, |
| 660 | .rpc_call_done = nfs41_call_sync_done, |
| 661 | }; |
| 662 | |
| 663 | struct rpc_call_ops nfs41_call_priv_sync_ops = { |
| 664 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, |
| 665 | .rpc_call_done = nfs41_call_sync_done, |
| 666 | }; |
| 667 | |
| 668 | static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, |
| 669 | struct nfs_server *server, |
| 670 | struct rpc_message *msg, |
| 671 | struct nfs4_sequence_args *args, |
| 672 | struct nfs4_sequence_res *res, |
| 673 | int cache_reply, |
| 674 | int privileged) |
| 675 | { |
| 676 | int ret; |
| 677 | struct rpc_task *task; |
| 678 | struct nfs41_call_sync_data data = { |
| 679 | .seq_server = server, |
| 680 | .seq_args = args, |
| 681 | .seq_res = res, |
| 682 | .cache_reply = cache_reply, |
| 683 | }; |
| 684 | struct rpc_task_setup task_setup = { |
| 685 | .rpc_client = clnt, |
| 686 | .rpc_message = msg, |
| 687 | .callback_ops = &nfs41_call_sync_ops, |
| 688 | .callback_data = &data |
| 689 | }; |
| 690 | |
| 691 | res->sr_slot = NULL; |
| 692 | if (privileged) |
| 693 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; |
| 694 | task = rpc_run_task(&task_setup); |
| 695 | if (IS_ERR(task)) |
| 696 | ret = PTR_ERR(task); |
| 697 | else { |
| 698 | ret = task->tk_status; |
| 699 | rpc_put_task(task); |
| 700 | } |
| 701 | return ret; |
| 702 | } |
| 703 | |
| 704 | int _nfs4_call_sync_session(struct rpc_clnt *clnt, |
| 705 | struct nfs_server *server, |
| 706 | struct rpc_message *msg, |
| 707 | struct nfs4_sequence_args *args, |
| 708 | struct nfs4_sequence_res *res, |
| 709 | int cache_reply) |
| 710 | { |
| 711 | return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0); |
| 712 | } |
| 713 | |
| 714 | #else |
| 715 | static int nfs4_sequence_done(struct rpc_task *task, |
| 716 | struct nfs4_sequence_res *res) |
| 717 | { |
| 718 | return 1; |
| 719 | } |
| 720 | #endif /* CONFIG_NFS_V4_1 */ |
| 721 | |
| 722 | int _nfs4_call_sync(struct rpc_clnt *clnt, |
| 723 | struct nfs_server *server, |
| 724 | struct rpc_message *msg, |
| 725 | struct nfs4_sequence_args *args, |
| 726 | struct nfs4_sequence_res *res, |
| 727 | int cache_reply) |
| 728 | { |
| 729 | args->sa_session = res->sr_session = NULL; |
| 730 | return rpc_call_sync(clnt, msg, 0); |
| 731 | } |
| 732 | |
| 733 | static inline |
| 734 | int nfs4_call_sync(struct rpc_clnt *clnt, |
| 735 | struct nfs_server *server, |
| 736 | struct rpc_message *msg, |
| 737 | struct nfs4_sequence_args *args, |
| 738 | struct nfs4_sequence_res *res, |
| 739 | int cache_reply) |
| 740 | { |
| 741 | return server->nfs_client->cl_mvops->call_sync(clnt, server, msg, |
| 742 | args, res, cache_reply); |
| 743 | } |
| 744 | |
| 745 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
| 746 | { |
| 747 | struct nfs_inode *nfsi = NFS_I(dir); |
| 748 | |
| 749 | spin_lock(&dir->i_lock); |
| 750 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
| 751 | if (!cinfo->atomic || cinfo->before != dir->i_version) |
| 752 | nfs_force_lookup_revalidate(dir); |
| 753 | dir->i_version = cinfo->after; |
| 754 | spin_unlock(&dir->i_lock); |
| 755 | } |
| 756 | |
| 757 | struct nfs4_opendata { |
| 758 | struct kref kref; |
| 759 | struct nfs_openargs o_arg; |
| 760 | struct nfs_openres o_res; |
| 761 | struct nfs_open_confirmargs c_arg; |
| 762 | struct nfs_open_confirmres c_res; |
| 763 | struct nfs_fattr f_attr; |
| 764 | struct nfs_fattr dir_attr; |
| 765 | struct dentry *dir; |
| 766 | struct dentry *dentry; |
| 767 | struct nfs4_state_owner *owner; |
| 768 | struct nfs4_state *state; |
| 769 | struct iattr attrs; |
| 770 | unsigned long timestamp; |
| 771 | unsigned int rpc_done : 1; |
| 772 | int rpc_status; |
| 773 | int cancelled; |
| 774 | }; |
| 775 | |
| 776 | |
| 777 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) |
| 778 | { |
| 779 | p->o_res.f_attr = &p->f_attr; |
| 780 | p->o_res.dir_attr = &p->dir_attr; |
| 781 | p->o_res.seqid = p->o_arg.seqid; |
| 782 | p->c_res.seqid = p->c_arg.seqid; |
| 783 | p->o_res.server = p->o_arg.server; |
| 784 | nfs_fattr_init(&p->f_attr); |
| 785 | nfs_fattr_init(&p->dir_attr); |
| 786 | } |
| 787 | |
| 788 | static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, |
| 789 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
| 790 | const struct iattr *attrs, |
| 791 | gfp_t gfp_mask) |
| 792 | { |
| 793 | struct dentry *parent = dget_parent(dentry); |
| 794 | struct inode *dir = parent->d_inode; |
| 795 | struct nfs_server *server = NFS_SERVER(dir); |
| 796 | struct nfs4_opendata *p; |
| 797 | |
| 798 | p = kzalloc(sizeof(*p), gfp_mask); |
| 799 | if (p == NULL) |
| 800 | goto err; |
| 801 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); |
| 802 | if (p->o_arg.seqid == NULL) |
| 803 | goto err_free; |
| 804 | nfs_sb_active(dentry->d_sb); |
| 805 | p->dentry = dget(dentry); |
| 806 | p->dir = parent; |
| 807 | p->owner = sp; |
| 808 | atomic_inc(&sp->so_count); |
| 809 | p->o_arg.fh = NFS_FH(dir); |
| 810 | p->o_arg.open_flags = flags; |
| 811 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); |
| 812 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
| 813 | p->o_arg.id = sp->so_owner_id.id; |
| 814 | p->o_arg.name = &dentry->d_name; |
| 815 | p->o_arg.server = server; |
| 816 | p->o_arg.bitmask = server->attr_bitmask; |
| 817 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; |
| 818 | if (flags & O_CREAT) { |
| 819 | u32 *s; |
| 820 | |
| 821 | p->o_arg.u.attrs = &p->attrs; |
| 822 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); |
| 823 | s = (u32 *) p->o_arg.u.verifier.data; |
| 824 | s[0] = jiffies; |
| 825 | s[1] = current->pid; |
| 826 | } |
| 827 | p->c_arg.fh = &p->o_res.fh; |
| 828 | p->c_arg.stateid = &p->o_res.stateid; |
| 829 | p->c_arg.seqid = p->o_arg.seqid; |
| 830 | nfs4_init_opendata_res(p); |
| 831 | kref_init(&p->kref); |
| 832 | return p; |
| 833 | err_free: |
| 834 | kfree(p); |
| 835 | err: |
| 836 | dput(parent); |
| 837 | return NULL; |
| 838 | } |
| 839 | |
| 840 | static void nfs4_opendata_free(struct kref *kref) |
| 841 | { |
| 842 | struct nfs4_opendata *p = container_of(kref, |
| 843 | struct nfs4_opendata, kref); |
| 844 | struct super_block *sb = p->dentry->d_sb; |
| 845 | |
| 846 | nfs_free_seqid(p->o_arg.seqid); |
| 847 | if (p->state != NULL) |
| 848 | nfs4_put_open_state(p->state); |
| 849 | nfs4_put_state_owner(p->owner); |
| 850 | dput(p->dir); |
| 851 | dput(p->dentry); |
| 852 | nfs_sb_deactive(sb); |
| 853 | kfree(p); |
| 854 | } |
| 855 | |
| 856 | static void nfs4_opendata_put(struct nfs4_opendata *p) |
| 857 | { |
| 858 | if (p != NULL) |
| 859 | kref_put(&p->kref, nfs4_opendata_free); |
| 860 | } |
| 861 | |
| 862 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
| 863 | { |
| 864 | int ret; |
| 865 | |
| 866 | ret = rpc_wait_for_completion_task(task); |
| 867 | return ret; |
| 868 | } |
| 869 | |
| 870 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
| 871 | { |
| 872 | int ret = 0; |
| 873 | |
| 874 | if (open_mode & O_EXCL) |
| 875 | goto out; |
| 876 | switch (mode & (FMODE_READ|FMODE_WRITE)) { |
| 877 | case FMODE_READ: |
| 878 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
| 879 | && state->n_rdonly != 0; |
| 880 | break; |
| 881 | case FMODE_WRITE: |
| 882 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
| 883 | && state->n_wronly != 0; |
| 884 | break; |
| 885 | case FMODE_READ|FMODE_WRITE: |
| 886 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
| 887 | && state->n_rdwr != 0; |
| 888 | } |
| 889 | out: |
| 890 | return ret; |
| 891 | } |
| 892 | |
| 893 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
| 894 | { |
| 895 | if (delegation == NULL) |
| 896 | return 0; |
| 897 | if ((delegation->type & fmode) != fmode) |
| 898 | return 0; |
| 899 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
| 900 | return 0; |
| 901 | nfs_mark_delegation_referenced(delegation); |
| 902 | return 1; |
| 903 | } |
| 904 | |
| 905 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
| 906 | { |
| 907 | switch (fmode) { |
| 908 | case FMODE_WRITE: |
| 909 | state->n_wronly++; |
| 910 | break; |
| 911 | case FMODE_READ: |
| 912 | state->n_rdonly++; |
| 913 | break; |
| 914 | case FMODE_READ|FMODE_WRITE: |
| 915 | state->n_rdwr++; |
| 916 | } |
| 917 | nfs4_state_set_mode_locked(state, state->state | fmode); |
| 918 | } |
| 919 | |
| 920 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| 921 | { |
| 922 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| 923 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); |
| 924 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); |
| 925 | switch (fmode) { |
| 926 | case FMODE_READ: |
| 927 | set_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 928 | break; |
| 929 | case FMODE_WRITE: |
| 930 | set_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 931 | break; |
| 932 | case FMODE_READ|FMODE_WRITE: |
| 933 | set_bit(NFS_O_RDWR_STATE, &state->flags); |
| 934 | } |
| 935 | } |
| 936 | |
| 937 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| 938 | { |
| 939 | write_seqlock(&state->seqlock); |
| 940 | nfs_set_open_stateid_locked(state, stateid, fmode); |
| 941 | write_sequnlock(&state->seqlock); |
| 942 | } |
| 943 | |
| 944 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
| 945 | { |
| 946 | /* |
| 947 | * Protect the call to nfs4_state_set_mode_locked and |
| 948 | * serialise the stateid update |
| 949 | */ |
| 950 | write_seqlock(&state->seqlock); |
| 951 | if (deleg_stateid != NULL) { |
| 952 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); |
| 953 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 954 | } |
| 955 | if (open_stateid != NULL) |
| 956 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
| 957 | write_sequnlock(&state->seqlock); |
| 958 | spin_lock(&state->owner->so_lock); |
| 959 | update_open_stateflags(state, fmode); |
| 960 | spin_unlock(&state->owner->so_lock); |
| 961 | } |
| 962 | |
| 963 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
| 964 | { |
| 965 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 966 | struct nfs_delegation *deleg_cur; |
| 967 | int ret = 0; |
| 968 | |
| 969 | fmode &= (FMODE_READ|FMODE_WRITE); |
| 970 | |
| 971 | rcu_read_lock(); |
| 972 | deleg_cur = rcu_dereference(nfsi->delegation); |
| 973 | if (deleg_cur == NULL) |
| 974 | goto no_delegation; |
| 975 | |
| 976 | spin_lock(&deleg_cur->lock); |
| 977 | if (nfsi->delegation != deleg_cur || |
| 978 | (deleg_cur->type & fmode) != fmode) |
| 979 | goto no_delegation_unlock; |
| 980 | |
| 981 | if (delegation == NULL) |
| 982 | delegation = &deleg_cur->stateid; |
| 983 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) |
| 984 | goto no_delegation_unlock; |
| 985 | |
| 986 | nfs_mark_delegation_referenced(deleg_cur); |
| 987 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
| 988 | ret = 1; |
| 989 | no_delegation_unlock: |
| 990 | spin_unlock(&deleg_cur->lock); |
| 991 | no_delegation: |
| 992 | rcu_read_unlock(); |
| 993 | |
| 994 | if (!ret && open_stateid != NULL) { |
| 995 | __update_open_stateid(state, open_stateid, NULL, fmode); |
| 996 | ret = 1; |
| 997 | } |
| 998 | |
| 999 | return ret; |
| 1000 | } |
| 1001 | |
| 1002 | |
| 1003 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
| 1004 | { |
| 1005 | struct nfs_delegation *delegation; |
| 1006 | |
| 1007 | rcu_read_lock(); |
| 1008 | delegation = rcu_dereference(NFS_I(inode)->delegation); |
| 1009 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
| 1010 | rcu_read_unlock(); |
| 1011 | return; |
| 1012 | } |
| 1013 | rcu_read_unlock(); |
| 1014 | nfs_inode_return_delegation(inode); |
| 1015 | } |
| 1016 | |
| 1017 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
| 1018 | { |
| 1019 | struct nfs4_state *state = opendata->state; |
| 1020 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 1021 | struct nfs_delegation *delegation; |
| 1022 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
| 1023 | fmode_t fmode = opendata->o_arg.fmode; |
| 1024 | nfs4_stateid stateid; |
| 1025 | int ret = -EAGAIN; |
| 1026 | |
| 1027 | for (;;) { |
| 1028 | if (can_open_cached(state, fmode, open_mode)) { |
| 1029 | spin_lock(&state->owner->so_lock); |
| 1030 | if (can_open_cached(state, fmode, open_mode)) { |
| 1031 | update_open_stateflags(state, fmode); |
| 1032 | spin_unlock(&state->owner->so_lock); |
| 1033 | goto out_return_state; |
| 1034 | } |
| 1035 | spin_unlock(&state->owner->so_lock); |
| 1036 | } |
| 1037 | rcu_read_lock(); |
| 1038 | delegation = rcu_dereference(nfsi->delegation); |
| 1039 | if (!can_open_delegated(delegation, fmode)) { |
| 1040 | rcu_read_unlock(); |
| 1041 | break; |
| 1042 | } |
| 1043 | /* Save the delegation */ |
| 1044 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); |
| 1045 | rcu_read_unlock(); |
| 1046 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
| 1047 | if (ret != 0) |
| 1048 | goto out; |
| 1049 | ret = -EAGAIN; |
| 1050 | |
| 1051 | /* Try to update the stateid using the delegation */ |
| 1052 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
| 1053 | goto out_return_state; |
| 1054 | } |
| 1055 | out: |
| 1056 | return ERR_PTR(ret); |
| 1057 | out_return_state: |
| 1058 | atomic_inc(&state->count); |
| 1059 | return state; |
| 1060 | } |
| 1061 | |
| 1062 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
| 1063 | { |
| 1064 | struct inode *inode; |
| 1065 | struct nfs4_state *state = NULL; |
| 1066 | struct nfs_delegation *delegation; |
| 1067 | int ret; |
| 1068 | |
| 1069 | if (!data->rpc_done) { |
| 1070 | state = nfs4_try_open_cached(data); |
| 1071 | goto out; |
| 1072 | } |
| 1073 | |
| 1074 | ret = -EAGAIN; |
| 1075 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
| 1076 | goto err; |
| 1077 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
| 1078 | ret = PTR_ERR(inode); |
| 1079 | if (IS_ERR(inode)) |
| 1080 | goto err; |
| 1081 | ret = -ENOMEM; |
| 1082 | state = nfs4_get_open_state(inode, data->owner); |
| 1083 | if (state == NULL) |
| 1084 | goto err_put_inode; |
| 1085 | if (data->o_res.delegation_type != 0) { |
| 1086 | int delegation_flags = 0; |
| 1087 | |
| 1088 | rcu_read_lock(); |
| 1089 | delegation = rcu_dereference(NFS_I(inode)->delegation); |
| 1090 | if (delegation) |
| 1091 | delegation_flags = delegation->flags; |
| 1092 | rcu_read_unlock(); |
| 1093 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { |
| 1094 | pr_err_ratelimited("NFS: Broken NFSv4 server %s is " |
| 1095 | "returning a delegation for " |
| 1096 | "OPEN(CLAIM_DELEGATE_CUR)\n", |
| 1097 | NFS_CLIENT(inode)->cl_server); |
| 1098 | } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
| 1099 | nfs_inode_set_delegation(state->inode, |
| 1100 | data->owner->so_cred, |
| 1101 | &data->o_res); |
| 1102 | else |
| 1103 | nfs_inode_reclaim_delegation(state->inode, |
| 1104 | data->owner->so_cred, |
| 1105 | &data->o_res); |
| 1106 | } |
| 1107 | |
| 1108 | update_open_stateid(state, &data->o_res.stateid, NULL, |
| 1109 | data->o_arg.fmode); |
| 1110 | iput(inode); |
| 1111 | out: |
| 1112 | return state; |
| 1113 | err_put_inode: |
| 1114 | iput(inode); |
| 1115 | err: |
| 1116 | return ERR_PTR(ret); |
| 1117 | } |
| 1118 | |
| 1119 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
| 1120 | { |
| 1121 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 1122 | struct nfs_open_context *ctx; |
| 1123 | |
| 1124 | spin_lock(&state->inode->i_lock); |
| 1125 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1126 | if (ctx->state != state) |
| 1127 | continue; |
| 1128 | get_nfs_open_context(ctx); |
| 1129 | spin_unlock(&state->inode->i_lock); |
| 1130 | return ctx; |
| 1131 | } |
| 1132 | spin_unlock(&state->inode->i_lock); |
| 1133 | return ERR_PTR(-ENOENT); |
| 1134 | } |
| 1135 | |
| 1136 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1137 | { |
| 1138 | struct nfs4_opendata *opendata; |
| 1139 | |
| 1140 | opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS); |
| 1141 | if (opendata == NULL) |
| 1142 | return ERR_PTR(-ENOMEM); |
| 1143 | opendata->state = state; |
| 1144 | atomic_inc(&state->count); |
| 1145 | return opendata; |
| 1146 | } |
| 1147 | |
| 1148 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
| 1149 | { |
| 1150 | struct nfs4_state *newstate; |
| 1151 | int ret; |
| 1152 | |
| 1153 | opendata->o_arg.open_flags = 0; |
| 1154 | opendata->o_arg.fmode = fmode; |
| 1155 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
| 1156 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); |
| 1157 | nfs4_init_opendata_res(opendata); |
| 1158 | ret = _nfs4_recover_proc_open(opendata); |
| 1159 | if (ret != 0) |
| 1160 | return ret; |
| 1161 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
| 1162 | if (IS_ERR(newstate)) |
| 1163 | return PTR_ERR(newstate); |
| 1164 | nfs4_close_state(newstate, fmode); |
| 1165 | *res = newstate; |
| 1166 | return 0; |
| 1167 | } |
| 1168 | |
| 1169 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) |
| 1170 | { |
| 1171 | struct nfs4_state *newstate; |
| 1172 | int ret; |
| 1173 | |
| 1174 | /* memory barrier prior to reading state->n_* */ |
| 1175 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1176 | smp_rmb(); |
| 1177 | if (state->n_rdwr != 0) { |
| 1178 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1179 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
| 1180 | if (ret != 0) |
| 1181 | return ret; |
| 1182 | if (newstate != state) |
| 1183 | return -ESTALE; |
| 1184 | } |
| 1185 | if (state->n_wronly != 0) { |
| 1186 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1187 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
| 1188 | if (ret != 0) |
| 1189 | return ret; |
| 1190 | if (newstate != state) |
| 1191 | return -ESTALE; |
| 1192 | } |
| 1193 | if (state->n_rdonly != 0) { |
| 1194 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1195 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
| 1196 | if (ret != 0) |
| 1197 | return ret; |
| 1198 | if (newstate != state) |
| 1199 | return -ESTALE; |
| 1200 | } |
| 1201 | /* |
| 1202 | * We may have performed cached opens for all three recoveries. |
| 1203 | * Check if we need to update the current stateid. |
| 1204 | */ |
| 1205 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && |
| 1206 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { |
| 1207 | write_seqlock(&state->seqlock); |
| 1208 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| 1209 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); |
| 1210 | write_sequnlock(&state->seqlock); |
| 1211 | } |
| 1212 | return 0; |
| 1213 | } |
| 1214 | |
| 1215 | /* |
| 1216 | * OPEN_RECLAIM: |
| 1217 | * reclaim state on the server after a reboot. |
| 1218 | */ |
| 1219 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1220 | { |
| 1221 | struct nfs_delegation *delegation; |
| 1222 | struct nfs4_opendata *opendata; |
| 1223 | fmode_t delegation_type = 0; |
| 1224 | int status; |
| 1225 | |
| 1226 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| 1227 | if (IS_ERR(opendata)) |
| 1228 | return PTR_ERR(opendata); |
| 1229 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
| 1230 | opendata->o_arg.fh = NFS_FH(state->inode); |
| 1231 | rcu_read_lock(); |
| 1232 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
| 1233 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
| 1234 | delegation_type = delegation->type; |
| 1235 | rcu_read_unlock(); |
| 1236 | opendata->o_arg.u.delegation_type = delegation_type; |
| 1237 | status = nfs4_open_recover(opendata, state); |
| 1238 | nfs4_opendata_put(opendata); |
| 1239 | return status; |
| 1240 | } |
| 1241 | |
| 1242 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1243 | { |
| 1244 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1245 | struct nfs4_exception exception = { }; |
| 1246 | int err; |
| 1247 | do { |
| 1248 | err = _nfs4_do_open_reclaim(ctx, state); |
| 1249 | if (err != -NFS4ERR_DELAY) |
| 1250 | break; |
| 1251 | nfs4_handle_exception(server, err, &exception); |
| 1252 | } while (exception.retry); |
| 1253 | return err; |
| 1254 | } |
| 1255 | |
| 1256 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 1257 | { |
| 1258 | struct nfs_open_context *ctx; |
| 1259 | int ret; |
| 1260 | |
| 1261 | ctx = nfs4_state_find_open_context(state); |
| 1262 | if (IS_ERR(ctx)) |
| 1263 | return PTR_ERR(ctx); |
| 1264 | ret = nfs4_do_open_reclaim(ctx, state); |
| 1265 | put_nfs_open_context(ctx); |
| 1266 | return ret; |
| 1267 | } |
| 1268 | |
| 1269 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
| 1270 | { |
| 1271 | struct nfs4_opendata *opendata; |
| 1272 | int ret; |
| 1273 | |
| 1274 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| 1275 | if (IS_ERR(opendata)) |
| 1276 | return PTR_ERR(opendata); |
| 1277 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
| 1278 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
| 1279 | sizeof(opendata->o_arg.u.delegation.data)); |
| 1280 | ret = nfs4_open_recover(opendata, state); |
| 1281 | nfs4_opendata_put(opendata); |
| 1282 | return ret; |
| 1283 | } |
| 1284 | |
| 1285 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
| 1286 | { |
| 1287 | struct nfs4_exception exception = { }; |
| 1288 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1289 | int err; |
| 1290 | do { |
| 1291 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
| 1292 | switch (err) { |
| 1293 | case 0: |
| 1294 | case -ENOENT: |
| 1295 | case -ESTALE: |
| 1296 | goto out; |
| 1297 | case -NFS4ERR_BADSESSION: |
| 1298 | case -NFS4ERR_BADSLOT: |
| 1299 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1300 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1301 | case -NFS4ERR_DEADSESSION: |
| 1302 | nfs4_schedule_session_recovery(server->nfs_client->cl_session); |
| 1303 | goto out; |
| 1304 | case -NFS4ERR_STALE_CLIENTID: |
| 1305 | case -NFS4ERR_STALE_STATEID: |
| 1306 | case -NFS4ERR_EXPIRED: |
| 1307 | /* Don't recall a delegation if it was lost */ |
| 1308 | nfs4_schedule_lease_recovery(server->nfs_client); |
| 1309 | goto out; |
| 1310 | case -ERESTARTSYS: |
| 1311 | /* |
| 1312 | * The show must go on: exit, but mark the |
| 1313 | * stateid as needing recovery. |
| 1314 | */ |
| 1315 | case -NFS4ERR_ADMIN_REVOKED: |
| 1316 | case -NFS4ERR_BAD_STATEID: |
| 1317 | nfs4_schedule_stateid_recovery(server, state); |
| 1318 | case -EKEYEXPIRED: |
| 1319 | /* |
| 1320 | * User RPCSEC_GSS context has expired. |
| 1321 | * We cannot recover this stateid now, so |
| 1322 | * skip it and allow recovery thread to |
| 1323 | * proceed. |
| 1324 | */ |
| 1325 | case -ENOMEM: |
| 1326 | err = 0; |
| 1327 | goto out; |
| 1328 | } |
| 1329 | err = nfs4_handle_exception(server, err, &exception); |
| 1330 | } while (exception.retry); |
| 1331 | out: |
| 1332 | return err; |
| 1333 | } |
| 1334 | |
| 1335 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
| 1336 | { |
| 1337 | struct nfs4_opendata *data = calldata; |
| 1338 | |
| 1339 | data->rpc_status = task->tk_status; |
| 1340 | if (data->rpc_status == 0) { |
| 1341 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
| 1342 | sizeof(data->o_res.stateid.data)); |
| 1343 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| 1344 | renew_lease(data->o_res.server, data->timestamp); |
| 1345 | data->rpc_done = 1; |
| 1346 | } |
| 1347 | } |
| 1348 | |
| 1349 | static void nfs4_open_confirm_release(void *calldata) |
| 1350 | { |
| 1351 | struct nfs4_opendata *data = calldata; |
| 1352 | struct nfs4_state *state = NULL; |
| 1353 | |
| 1354 | /* If this request hasn't been cancelled, do nothing */ |
| 1355 | if (data->cancelled == 0) |
| 1356 | goto out_free; |
| 1357 | /* In case of error, no cleanup! */ |
| 1358 | if (!data->rpc_done) |
| 1359 | goto out_free; |
| 1360 | state = nfs4_opendata_to_nfs4_state(data); |
| 1361 | if (!IS_ERR(state)) |
| 1362 | nfs4_close_state(state, data->o_arg.fmode); |
| 1363 | out_free: |
| 1364 | nfs4_opendata_put(data); |
| 1365 | } |
| 1366 | |
| 1367 | static const struct rpc_call_ops nfs4_open_confirm_ops = { |
| 1368 | .rpc_call_done = nfs4_open_confirm_done, |
| 1369 | .rpc_release = nfs4_open_confirm_release, |
| 1370 | }; |
| 1371 | |
| 1372 | /* |
| 1373 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata |
| 1374 | */ |
| 1375 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) |
| 1376 | { |
| 1377 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); |
| 1378 | struct rpc_task *task; |
| 1379 | struct rpc_message msg = { |
| 1380 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| 1381 | .rpc_argp = &data->c_arg, |
| 1382 | .rpc_resp = &data->c_res, |
| 1383 | .rpc_cred = data->owner->so_cred, |
| 1384 | }; |
| 1385 | struct rpc_task_setup task_setup_data = { |
| 1386 | .rpc_client = server->client, |
| 1387 | .rpc_message = &msg, |
| 1388 | .callback_ops = &nfs4_open_confirm_ops, |
| 1389 | .callback_data = data, |
| 1390 | .workqueue = nfsiod_workqueue, |
| 1391 | .flags = RPC_TASK_ASYNC, |
| 1392 | }; |
| 1393 | int status; |
| 1394 | |
| 1395 | kref_get(&data->kref); |
| 1396 | data->rpc_done = 0; |
| 1397 | data->rpc_status = 0; |
| 1398 | data->timestamp = jiffies; |
| 1399 | task = rpc_run_task(&task_setup_data); |
| 1400 | if (IS_ERR(task)) |
| 1401 | return PTR_ERR(task); |
| 1402 | status = nfs4_wait_for_completion_rpc_task(task); |
| 1403 | if (status != 0) { |
| 1404 | data->cancelled = 1; |
| 1405 | smp_wmb(); |
| 1406 | } else |
| 1407 | status = data->rpc_status; |
| 1408 | rpc_put_task(task); |
| 1409 | return status; |
| 1410 | } |
| 1411 | |
| 1412 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
| 1413 | { |
| 1414 | struct nfs4_opendata *data = calldata; |
| 1415 | struct nfs4_state_owner *sp = data->owner; |
| 1416 | |
| 1417 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
| 1418 | return; |
| 1419 | /* |
| 1420 | * Check if we still need to send an OPEN call, or if we can use |
| 1421 | * a delegation instead. |
| 1422 | */ |
| 1423 | if (data->state != NULL) { |
| 1424 | struct nfs_delegation *delegation; |
| 1425 | |
| 1426 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
| 1427 | goto out_no_action; |
| 1428 | rcu_read_lock(); |
| 1429 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); |
| 1430 | if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && |
| 1431 | can_open_delegated(delegation, data->o_arg.fmode)) |
| 1432 | goto unlock_no_action; |
| 1433 | rcu_read_unlock(); |
| 1434 | } |
| 1435 | /* Update sequence id. */ |
| 1436 | data->o_arg.id = sp->so_owner_id.id; |
| 1437 | data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; |
| 1438 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
| 1439 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
| 1440 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
| 1441 | } |
| 1442 | data->timestamp = jiffies; |
| 1443 | if (nfs4_setup_sequence(data->o_arg.server, |
| 1444 | &data->o_arg.seq_args, |
| 1445 | &data->o_res.seq_res, 1, task)) |
| 1446 | return; |
| 1447 | rpc_call_start(task); |
| 1448 | return; |
| 1449 | unlock_no_action: |
| 1450 | rcu_read_unlock(); |
| 1451 | out_no_action: |
| 1452 | task->tk_action = NULL; |
| 1453 | |
| 1454 | } |
| 1455 | |
| 1456 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
| 1457 | { |
| 1458 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 1459 | nfs4_open_prepare(task, calldata); |
| 1460 | } |
| 1461 | |
| 1462 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
| 1463 | { |
| 1464 | struct nfs4_opendata *data = calldata; |
| 1465 | |
| 1466 | data->rpc_status = task->tk_status; |
| 1467 | |
| 1468 | if (!nfs4_sequence_done(task, &data->o_res.seq_res)) |
| 1469 | return; |
| 1470 | |
| 1471 | if (task->tk_status == 0) { |
| 1472 | switch (data->o_res.f_attr->mode & S_IFMT) { |
| 1473 | case S_IFREG: |
| 1474 | break; |
| 1475 | case S_IFLNK: |
| 1476 | data->rpc_status = -ELOOP; |
| 1477 | break; |
| 1478 | case S_IFDIR: |
| 1479 | data->rpc_status = -EISDIR; |
| 1480 | break; |
| 1481 | default: |
| 1482 | data->rpc_status = -ENOTDIR; |
| 1483 | } |
| 1484 | renew_lease(data->o_res.server, data->timestamp); |
| 1485 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
| 1486 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| 1487 | } |
| 1488 | data->rpc_done = 1; |
| 1489 | } |
| 1490 | |
| 1491 | static void nfs4_open_release(void *calldata) |
| 1492 | { |
| 1493 | struct nfs4_opendata *data = calldata; |
| 1494 | struct nfs4_state *state = NULL; |
| 1495 | |
| 1496 | /* If this request hasn't been cancelled, do nothing */ |
| 1497 | if (data->cancelled == 0) |
| 1498 | goto out_free; |
| 1499 | /* In case of error, no cleanup! */ |
| 1500 | if (data->rpc_status != 0 || !data->rpc_done) |
| 1501 | goto out_free; |
| 1502 | /* In case we need an open_confirm, no cleanup! */ |
| 1503 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) |
| 1504 | goto out_free; |
| 1505 | state = nfs4_opendata_to_nfs4_state(data); |
| 1506 | if (!IS_ERR(state)) |
| 1507 | nfs4_close_state(state, data->o_arg.fmode); |
| 1508 | out_free: |
| 1509 | nfs4_opendata_put(data); |
| 1510 | } |
| 1511 | |
| 1512 | static const struct rpc_call_ops nfs4_open_ops = { |
| 1513 | .rpc_call_prepare = nfs4_open_prepare, |
| 1514 | .rpc_call_done = nfs4_open_done, |
| 1515 | .rpc_release = nfs4_open_release, |
| 1516 | }; |
| 1517 | |
| 1518 | static const struct rpc_call_ops nfs4_recover_open_ops = { |
| 1519 | .rpc_call_prepare = nfs4_recover_open_prepare, |
| 1520 | .rpc_call_done = nfs4_open_done, |
| 1521 | .rpc_release = nfs4_open_release, |
| 1522 | }; |
| 1523 | |
| 1524 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) |
| 1525 | { |
| 1526 | struct inode *dir = data->dir->d_inode; |
| 1527 | struct nfs_server *server = NFS_SERVER(dir); |
| 1528 | struct nfs_openargs *o_arg = &data->o_arg; |
| 1529 | struct nfs_openres *o_res = &data->o_res; |
| 1530 | struct rpc_task *task; |
| 1531 | struct rpc_message msg = { |
| 1532 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
| 1533 | .rpc_argp = o_arg, |
| 1534 | .rpc_resp = o_res, |
| 1535 | .rpc_cred = data->owner->so_cred, |
| 1536 | }; |
| 1537 | struct rpc_task_setup task_setup_data = { |
| 1538 | .rpc_client = server->client, |
| 1539 | .rpc_message = &msg, |
| 1540 | .callback_ops = &nfs4_open_ops, |
| 1541 | .callback_data = data, |
| 1542 | .workqueue = nfsiod_workqueue, |
| 1543 | .flags = RPC_TASK_ASYNC, |
| 1544 | }; |
| 1545 | int status; |
| 1546 | |
| 1547 | kref_get(&data->kref); |
| 1548 | data->rpc_done = 0; |
| 1549 | data->rpc_status = 0; |
| 1550 | data->cancelled = 0; |
| 1551 | if (isrecover) |
| 1552 | task_setup_data.callback_ops = &nfs4_recover_open_ops; |
| 1553 | task = rpc_run_task(&task_setup_data); |
| 1554 | if (IS_ERR(task)) |
| 1555 | return PTR_ERR(task); |
| 1556 | status = nfs4_wait_for_completion_rpc_task(task); |
| 1557 | if (status != 0) { |
| 1558 | data->cancelled = 1; |
| 1559 | smp_wmb(); |
| 1560 | } else |
| 1561 | status = data->rpc_status; |
| 1562 | rpc_put_task(task); |
| 1563 | |
| 1564 | return status; |
| 1565 | } |
| 1566 | |
| 1567 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) |
| 1568 | { |
| 1569 | struct inode *dir = data->dir->d_inode; |
| 1570 | struct nfs_openres *o_res = &data->o_res; |
| 1571 | int status; |
| 1572 | |
| 1573 | status = nfs4_run_open_task(data, 1); |
| 1574 | if (status != 0 || !data->rpc_done) |
| 1575 | return status; |
| 1576 | |
| 1577 | nfs_refresh_inode(dir, o_res->dir_attr); |
| 1578 | |
| 1579 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| 1580 | status = _nfs4_proc_open_confirm(data); |
| 1581 | if (status != 0) |
| 1582 | return status; |
| 1583 | } |
| 1584 | |
| 1585 | return status; |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata |
| 1590 | */ |
| 1591 | static int _nfs4_proc_open(struct nfs4_opendata *data) |
| 1592 | { |
| 1593 | struct inode *dir = data->dir->d_inode; |
| 1594 | struct nfs_server *server = NFS_SERVER(dir); |
| 1595 | struct nfs_openargs *o_arg = &data->o_arg; |
| 1596 | struct nfs_openres *o_res = &data->o_res; |
| 1597 | int status; |
| 1598 | |
| 1599 | status = nfs4_run_open_task(data, 0); |
| 1600 | if (!data->rpc_done) |
| 1601 | return status; |
| 1602 | if (status != 0) { |
| 1603 | if (status == -NFS4ERR_BADNAME && |
| 1604 | !(o_arg->open_flags & O_CREAT)) |
| 1605 | return -ENOENT; |
| 1606 | return status; |
| 1607 | } |
| 1608 | |
| 1609 | if (o_arg->open_flags & O_CREAT) { |
| 1610 | update_changeattr(dir, &o_res->cinfo); |
| 1611 | nfs_post_op_update_inode(dir, o_res->dir_attr); |
| 1612 | } else |
| 1613 | nfs_refresh_inode(dir, o_res->dir_attr); |
| 1614 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
| 1615 | server->caps &= ~NFS_CAP_POSIX_LOCK; |
| 1616 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| 1617 | status = _nfs4_proc_open_confirm(data); |
| 1618 | if (status != 0) |
| 1619 | return status; |
| 1620 | } |
| 1621 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
| 1622 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
| 1623 | return 0; |
| 1624 | } |
| 1625 | |
| 1626 | static int nfs4_client_recover_expired_lease(struct nfs_client *clp) |
| 1627 | { |
| 1628 | unsigned int loop; |
| 1629 | int ret; |
| 1630 | |
| 1631 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| 1632 | ret = nfs4_wait_clnt_recover(clp); |
| 1633 | if (ret != 0) |
| 1634 | break; |
| 1635 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1636 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| 1637 | break; |
| 1638 | nfs4_schedule_state_manager(clp); |
| 1639 | ret = -EIO; |
| 1640 | } |
| 1641 | return ret; |
| 1642 | } |
| 1643 | |
| 1644 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
| 1645 | { |
| 1646 | return nfs4_client_recover_expired_lease(server->nfs_client); |
| 1647 | } |
| 1648 | |
| 1649 | /* |
| 1650 | * OPEN_EXPIRED: |
| 1651 | * reclaim state on the server after a network partition. |
| 1652 | * Assumes caller holds the appropriate lock |
| 1653 | */ |
| 1654 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1655 | { |
| 1656 | struct nfs4_opendata *opendata; |
| 1657 | int ret; |
| 1658 | |
| 1659 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
| 1660 | if (IS_ERR(opendata)) |
| 1661 | return PTR_ERR(opendata); |
| 1662 | ret = nfs4_open_recover(opendata, state); |
| 1663 | if (ret == -ESTALE) |
| 1664 | d_drop(ctx->dentry); |
| 1665 | nfs4_opendata_put(opendata); |
| 1666 | return ret; |
| 1667 | } |
| 1668 | |
| 1669 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| 1670 | { |
| 1671 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1672 | struct nfs4_exception exception = { }; |
| 1673 | int err; |
| 1674 | |
| 1675 | do { |
| 1676 | err = _nfs4_open_expired(ctx, state); |
| 1677 | switch (err) { |
| 1678 | default: |
| 1679 | goto out; |
| 1680 | case -NFS4ERR_GRACE: |
| 1681 | case -NFS4ERR_DELAY: |
| 1682 | nfs4_handle_exception(server, err, &exception); |
| 1683 | err = 0; |
| 1684 | } |
| 1685 | } while (exception.retry); |
| 1686 | out: |
| 1687 | return err; |
| 1688 | } |
| 1689 | |
| 1690 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 1691 | { |
| 1692 | struct nfs_open_context *ctx; |
| 1693 | int ret; |
| 1694 | |
| 1695 | ctx = nfs4_state_find_open_context(state); |
| 1696 | if (IS_ERR(ctx)) |
| 1697 | return PTR_ERR(ctx); |
| 1698 | ret = nfs4_do_open_expired(ctx, state); |
| 1699 | put_nfs_open_context(ctx); |
| 1700 | return ret; |
| 1701 | } |
| 1702 | |
| 1703 | #if defined(CONFIG_NFS_V4_1) |
| 1704 | static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 1705 | { |
| 1706 | int status; |
| 1707 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 1708 | |
| 1709 | status = nfs41_test_stateid(server, state); |
| 1710 | if (status == NFS_OK) |
| 1711 | return 0; |
| 1712 | nfs41_free_stateid(server, state); |
| 1713 | return nfs4_open_expired(sp, state); |
| 1714 | } |
| 1715 | #endif |
| 1716 | |
| 1717 | /* |
| 1718 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* |
| 1719 | * fields corresponding to attributes that were used to store the verifier. |
| 1720 | * Make sure we clobber those fields in the later setattr call |
| 1721 | */ |
| 1722 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) |
| 1723 | { |
| 1724 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && |
| 1725 | !(sattr->ia_valid & ATTR_ATIME_SET)) |
| 1726 | sattr->ia_valid |= ATTR_ATIME; |
| 1727 | |
| 1728 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && |
| 1729 | !(sattr->ia_valid & ATTR_MTIME_SET)) |
| 1730 | sattr->ia_valid |= ATTR_MTIME; |
| 1731 | } |
| 1732 | |
| 1733 | /* |
| 1734 | * Returns a referenced nfs4_state |
| 1735 | */ |
| 1736 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
| 1737 | { |
| 1738 | struct nfs4_state_owner *sp; |
| 1739 | struct nfs4_state *state = NULL; |
| 1740 | struct nfs_server *server = NFS_SERVER(dir); |
| 1741 | struct nfs4_opendata *opendata; |
| 1742 | int status; |
| 1743 | |
| 1744 | /* Protect against reboot recovery conflicts */ |
| 1745 | status = -ENOMEM; |
| 1746 | if (!(sp = nfs4_get_state_owner(server, cred))) { |
| 1747 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| 1748 | goto out_err; |
| 1749 | } |
| 1750 | status = nfs4_recover_expired_lease(server); |
| 1751 | if (status != 0) |
| 1752 | goto err_put_state_owner; |
| 1753 | if (dentry->d_inode != NULL) |
| 1754 | nfs4_return_incompatible_delegation(dentry->d_inode, fmode); |
| 1755 | status = -ENOMEM; |
| 1756 | opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL); |
| 1757 | if (opendata == NULL) |
| 1758 | goto err_put_state_owner; |
| 1759 | |
| 1760 | if (dentry->d_inode != NULL) |
| 1761 | opendata->state = nfs4_get_open_state(dentry->d_inode, sp); |
| 1762 | |
| 1763 | status = _nfs4_proc_open(opendata); |
| 1764 | if (status != 0) |
| 1765 | goto err_opendata_put; |
| 1766 | |
| 1767 | state = nfs4_opendata_to_nfs4_state(opendata); |
| 1768 | status = PTR_ERR(state); |
| 1769 | if (IS_ERR(state)) |
| 1770 | goto err_opendata_put; |
| 1771 | if (server->caps & NFS_CAP_POSIX_LOCK) |
| 1772 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
| 1773 | |
| 1774 | if (opendata->o_arg.open_flags & O_EXCL) { |
| 1775 | nfs4_exclusive_attrset(opendata, sattr); |
| 1776 | |
| 1777 | nfs_fattr_init(opendata->o_res.f_attr); |
| 1778 | status = nfs4_do_setattr(state->inode, cred, |
| 1779 | opendata->o_res.f_attr, sattr, |
| 1780 | state); |
| 1781 | if (status == 0) |
| 1782 | nfs_setattr_update_inode(state->inode, sattr); |
| 1783 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); |
| 1784 | } |
| 1785 | nfs4_opendata_put(opendata); |
| 1786 | nfs4_put_state_owner(sp); |
| 1787 | *res = state; |
| 1788 | return 0; |
| 1789 | err_opendata_put: |
| 1790 | nfs4_opendata_put(opendata); |
| 1791 | err_put_state_owner: |
| 1792 | nfs4_put_state_owner(sp); |
| 1793 | out_err: |
| 1794 | *res = NULL; |
| 1795 | return status; |
| 1796 | } |
| 1797 | |
| 1798 | |
| 1799 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) |
| 1800 | { |
| 1801 | struct nfs4_exception exception = { }; |
| 1802 | struct nfs4_state *res; |
| 1803 | int status; |
| 1804 | |
| 1805 | do { |
| 1806 | status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res); |
| 1807 | if (status == 0) |
| 1808 | break; |
| 1809 | /* NOTE: BAD_SEQID means the server and client disagree about the |
| 1810 | * book-keeping w.r.t. state-changing operations |
| 1811 | * (OPEN/CLOSE/LOCK/LOCKU...) |
| 1812 | * It is actually a sign of a bug on the client or on the server. |
| 1813 | * |
| 1814 | * If we receive a BAD_SEQID error in the particular case of |
| 1815 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
| 1816 | * have unhashed the old state_owner for us, and that we can |
| 1817 | * therefore safely retry using a new one. We should still warn |
| 1818 | * the user though... |
| 1819 | */ |
| 1820 | if (status == -NFS4ERR_BAD_SEQID) { |
| 1821 | printk(KERN_WARNING "NFS: v4 server %s " |
| 1822 | " returned a bad sequence-id error!\n", |
| 1823 | NFS_SERVER(dir)->nfs_client->cl_hostname); |
| 1824 | exception.retry = 1; |
| 1825 | continue; |
| 1826 | } |
| 1827 | /* |
| 1828 | * BAD_STATEID on OPEN means that the server cancelled our |
| 1829 | * state before it received the OPEN_CONFIRM. |
| 1830 | * Recover by retrying the request as per the discussion |
| 1831 | * on Page 181 of RFC3530. |
| 1832 | */ |
| 1833 | if (status == -NFS4ERR_BAD_STATEID) { |
| 1834 | exception.retry = 1; |
| 1835 | continue; |
| 1836 | } |
| 1837 | if (status == -EAGAIN) { |
| 1838 | /* We must have found a delegation */ |
| 1839 | exception.retry = 1; |
| 1840 | continue; |
| 1841 | } |
| 1842 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
| 1843 | status, &exception)); |
| 1844 | } while (exception.retry); |
| 1845 | return res; |
| 1846 | } |
| 1847 | |
| 1848 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| 1849 | struct nfs_fattr *fattr, struct iattr *sattr, |
| 1850 | struct nfs4_state *state) |
| 1851 | { |
| 1852 | struct nfs_server *server = NFS_SERVER(inode); |
| 1853 | struct nfs_setattrargs arg = { |
| 1854 | .fh = NFS_FH(inode), |
| 1855 | .iap = sattr, |
| 1856 | .server = server, |
| 1857 | .bitmask = server->attr_bitmask, |
| 1858 | }; |
| 1859 | struct nfs_setattrres res = { |
| 1860 | .fattr = fattr, |
| 1861 | .server = server, |
| 1862 | }; |
| 1863 | struct rpc_message msg = { |
| 1864 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| 1865 | .rpc_argp = &arg, |
| 1866 | .rpc_resp = &res, |
| 1867 | .rpc_cred = cred, |
| 1868 | }; |
| 1869 | unsigned long timestamp = jiffies; |
| 1870 | int status; |
| 1871 | |
| 1872 | nfs_fattr_init(fattr); |
| 1873 | |
| 1874 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
| 1875 | /* Use that stateid */ |
| 1876 | } else if (state != NULL) { |
| 1877 | nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid); |
| 1878 | } else |
| 1879 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
| 1880 | |
| 1881 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| 1882 | if (status == 0 && state != NULL) |
| 1883 | renew_lease(server, timestamp); |
| 1884 | return status; |
| 1885 | } |
| 1886 | |
| 1887 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| 1888 | struct nfs_fattr *fattr, struct iattr *sattr, |
| 1889 | struct nfs4_state *state) |
| 1890 | { |
| 1891 | struct nfs_server *server = NFS_SERVER(inode); |
| 1892 | struct nfs4_exception exception = { }; |
| 1893 | int err; |
| 1894 | do { |
| 1895 | err = nfs4_handle_exception(server, |
| 1896 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
| 1897 | &exception); |
| 1898 | } while (exception.retry); |
| 1899 | return err; |
| 1900 | } |
| 1901 | |
| 1902 | struct nfs4_closedata { |
| 1903 | struct inode *inode; |
| 1904 | struct nfs4_state *state; |
| 1905 | struct nfs_closeargs arg; |
| 1906 | struct nfs_closeres res; |
| 1907 | struct nfs_fattr fattr; |
| 1908 | unsigned long timestamp; |
| 1909 | bool roc; |
| 1910 | u32 roc_barrier; |
| 1911 | }; |
| 1912 | |
| 1913 | static void nfs4_free_closedata(void *data) |
| 1914 | { |
| 1915 | struct nfs4_closedata *calldata = data; |
| 1916 | struct nfs4_state_owner *sp = calldata->state->owner; |
| 1917 | struct super_block *sb = calldata->state->inode->i_sb; |
| 1918 | |
| 1919 | if (calldata->roc) |
| 1920 | pnfs_roc_release(calldata->state->inode); |
| 1921 | nfs4_put_open_state(calldata->state); |
| 1922 | nfs_free_seqid(calldata->arg.seqid); |
| 1923 | nfs4_put_state_owner(sp); |
| 1924 | nfs_sb_deactive(sb); |
| 1925 | kfree(calldata); |
| 1926 | } |
| 1927 | |
| 1928 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
| 1929 | fmode_t fmode) |
| 1930 | { |
| 1931 | spin_lock(&state->owner->so_lock); |
| 1932 | if (!(fmode & FMODE_READ)) |
| 1933 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1934 | if (!(fmode & FMODE_WRITE)) |
| 1935 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1936 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1937 | spin_unlock(&state->owner->so_lock); |
| 1938 | } |
| 1939 | |
| 1940 | static void nfs4_close_done(struct rpc_task *task, void *data) |
| 1941 | { |
| 1942 | struct nfs4_closedata *calldata = data; |
| 1943 | struct nfs4_state *state = calldata->state; |
| 1944 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
| 1945 | |
| 1946 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| 1947 | return; |
| 1948 | /* hmm. we are done with the inode, and in the process of freeing |
| 1949 | * the state_owner. we keep this around to process errors |
| 1950 | */ |
| 1951 | switch (task->tk_status) { |
| 1952 | case 0: |
| 1953 | if (calldata->roc) |
| 1954 | pnfs_roc_set_barrier(state->inode, |
| 1955 | calldata->roc_barrier); |
| 1956 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
| 1957 | renew_lease(server, calldata->timestamp); |
| 1958 | nfs4_close_clear_stateid_flags(state, |
| 1959 | calldata->arg.fmode); |
| 1960 | break; |
| 1961 | case -NFS4ERR_STALE_STATEID: |
| 1962 | case -NFS4ERR_OLD_STATEID: |
| 1963 | case -NFS4ERR_BAD_STATEID: |
| 1964 | case -NFS4ERR_EXPIRED: |
| 1965 | if (calldata->arg.fmode == 0) |
| 1966 | break; |
| 1967 | default: |
| 1968 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
| 1969 | rpc_restart_call_prepare(task); |
| 1970 | } |
| 1971 | nfs_release_seqid(calldata->arg.seqid); |
| 1972 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
| 1973 | } |
| 1974 | |
| 1975 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
| 1976 | { |
| 1977 | struct nfs4_closedata *calldata = data; |
| 1978 | struct nfs4_state *state = calldata->state; |
| 1979 | int call_close = 0; |
| 1980 | |
| 1981 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| 1982 | return; |
| 1983 | |
| 1984 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
| 1985 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; |
| 1986 | spin_lock(&state->owner->so_lock); |
| 1987 | /* Calculate the change in open mode */ |
| 1988 | if (state->n_rdwr == 0) { |
| 1989 | if (state->n_rdonly == 0) { |
| 1990 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1991 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1992 | calldata->arg.fmode &= ~FMODE_READ; |
| 1993 | } |
| 1994 | if (state->n_wronly == 0) { |
| 1995 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1996 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1997 | calldata->arg.fmode &= ~FMODE_WRITE; |
| 1998 | } |
| 1999 | } |
| 2000 | spin_unlock(&state->owner->so_lock); |
| 2001 | |
| 2002 | if (!call_close) { |
| 2003 | /* Note: exit _without_ calling nfs4_close_done */ |
| 2004 | task->tk_action = NULL; |
| 2005 | return; |
| 2006 | } |
| 2007 | |
| 2008 | if (calldata->arg.fmode == 0) { |
| 2009 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; |
| 2010 | if (calldata->roc && |
| 2011 | pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) { |
| 2012 | rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq, |
| 2013 | task, NULL); |
| 2014 | return; |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | nfs_fattr_init(calldata->res.fattr); |
| 2019 | calldata->timestamp = jiffies; |
| 2020 | if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), |
| 2021 | &calldata->arg.seq_args, &calldata->res.seq_res, |
| 2022 | 1, task)) |
| 2023 | return; |
| 2024 | rpc_call_start(task); |
| 2025 | } |
| 2026 | |
| 2027 | static const struct rpc_call_ops nfs4_close_ops = { |
| 2028 | .rpc_call_prepare = nfs4_close_prepare, |
| 2029 | .rpc_call_done = nfs4_close_done, |
| 2030 | .rpc_release = nfs4_free_closedata, |
| 2031 | }; |
| 2032 | |
| 2033 | /* |
| 2034 | * It is possible for data to be read/written from a mem-mapped file |
| 2035 | * after the sys_close call (which hits the vfs layer as a flush). |
| 2036 | * This means that we can't safely call nfsv4 close on a file until |
| 2037 | * the inode is cleared. This in turn means that we are not good |
| 2038 | * NFSv4 citizens - we do not indicate to the server to update the file's |
| 2039 | * share state even when we are done with one of the three share |
| 2040 | * stateid's in the inode. |
| 2041 | * |
| 2042 | * NOTE: Caller must be holding the sp->so_owner semaphore! |
| 2043 | */ |
| 2044 | int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc) |
| 2045 | { |
| 2046 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 2047 | struct nfs4_closedata *calldata; |
| 2048 | struct nfs4_state_owner *sp = state->owner; |
| 2049 | struct rpc_task *task; |
| 2050 | struct rpc_message msg = { |
| 2051 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| 2052 | .rpc_cred = state->owner->so_cred, |
| 2053 | }; |
| 2054 | struct rpc_task_setup task_setup_data = { |
| 2055 | .rpc_client = server->client, |
| 2056 | .rpc_message = &msg, |
| 2057 | .callback_ops = &nfs4_close_ops, |
| 2058 | .workqueue = nfsiod_workqueue, |
| 2059 | .flags = RPC_TASK_ASYNC, |
| 2060 | }; |
| 2061 | int status = -ENOMEM; |
| 2062 | |
| 2063 | calldata = kzalloc(sizeof(*calldata), gfp_mask); |
| 2064 | if (calldata == NULL) |
| 2065 | goto out; |
| 2066 | calldata->inode = state->inode; |
| 2067 | calldata->state = state; |
| 2068 | calldata->arg.fh = NFS_FH(state->inode); |
| 2069 | calldata->arg.stateid = &state->open_stateid; |
| 2070 | /* Serialization for the sequence id */ |
| 2071 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); |
| 2072 | if (calldata->arg.seqid == NULL) |
| 2073 | goto out_free_calldata; |
| 2074 | calldata->arg.fmode = 0; |
| 2075 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
| 2076 | calldata->res.fattr = &calldata->fattr; |
| 2077 | calldata->res.seqid = calldata->arg.seqid; |
| 2078 | calldata->res.server = server; |
| 2079 | calldata->roc = roc; |
| 2080 | nfs_sb_active(calldata->inode->i_sb); |
| 2081 | |
| 2082 | msg.rpc_argp = &calldata->arg; |
| 2083 | msg.rpc_resp = &calldata->res; |
| 2084 | task_setup_data.callback_data = calldata; |
| 2085 | task = rpc_run_task(&task_setup_data); |
| 2086 | if (IS_ERR(task)) |
| 2087 | return PTR_ERR(task); |
| 2088 | status = 0; |
| 2089 | if (wait) |
| 2090 | status = rpc_wait_for_completion_task(task); |
| 2091 | rpc_put_task(task); |
| 2092 | return status; |
| 2093 | out_free_calldata: |
| 2094 | kfree(calldata); |
| 2095 | out: |
| 2096 | if (roc) |
| 2097 | pnfs_roc_release(state->inode); |
| 2098 | nfs4_put_open_state(state); |
| 2099 | nfs4_put_state_owner(sp); |
| 2100 | return status; |
| 2101 | } |
| 2102 | |
| 2103 | static struct inode * |
| 2104 | nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) |
| 2105 | { |
| 2106 | struct nfs4_state *state; |
| 2107 | |
| 2108 | /* Protect against concurrent sillydeletes */ |
| 2109 | state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred); |
| 2110 | if (IS_ERR(state)) |
| 2111 | return ERR_CAST(state); |
| 2112 | ctx->state = state; |
| 2113 | return igrab(state->inode); |
| 2114 | } |
| 2115 | |
| 2116 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
| 2117 | { |
| 2118 | if (ctx->state == NULL) |
| 2119 | return; |
| 2120 | if (is_sync) |
| 2121 | nfs4_close_sync(ctx->state, ctx->mode); |
| 2122 | else |
| 2123 | nfs4_close_state(ctx->state, ctx->mode); |
| 2124 | } |
| 2125 | |
| 2126 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 2127 | { |
| 2128 | struct nfs4_server_caps_arg args = { |
| 2129 | .fhandle = fhandle, |
| 2130 | }; |
| 2131 | struct nfs4_server_caps_res res = {}; |
| 2132 | struct rpc_message msg = { |
| 2133 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| 2134 | .rpc_argp = &args, |
| 2135 | .rpc_resp = &res, |
| 2136 | }; |
| 2137 | int status; |
| 2138 | |
| 2139 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 2140 | if (status == 0) { |
| 2141 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| 2142 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
| 2143 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
| 2144 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| |
| 2145 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| |
| 2146 | NFS_CAP_CTIME|NFS_CAP_MTIME); |
| 2147 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
| 2148 | server->caps |= NFS_CAP_ACLS; |
| 2149 | if (res.has_links != 0) |
| 2150 | server->caps |= NFS_CAP_HARDLINKS; |
| 2151 | if (res.has_symlinks != 0) |
| 2152 | server->caps |= NFS_CAP_SYMLINKS; |
| 2153 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
| 2154 | server->caps |= NFS_CAP_FILEID; |
| 2155 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) |
| 2156 | server->caps |= NFS_CAP_MODE; |
| 2157 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) |
| 2158 | server->caps |= NFS_CAP_NLINK; |
| 2159 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) |
| 2160 | server->caps |= NFS_CAP_OWNER; |
| 2161 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) |
| 2162 | server->caps |= NFS_CAP_OWNER_GROUP; |
| 2163 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) |
| 2164 | server->caps |= NFS_CAP_ATIME; |
| 2165 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) |
| 2166 | server->caps |= NFS_CAP_CTIME; |
| 2167 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) |
| 2168 | server->caps |= NFS_CAP_MTIME; |
| 2169 | |
| 2170 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
| 2171 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; |
| 2172 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; |
| 2173 | server->acl_bitmask = res.acl_bitmask; |
| 2174 | } |
| 2175 | |
| 2176 | return status; |
| 2177 | } |
| 2178 | |
| 2179 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 2180 | { |
| 2181 | struct nfs4_exception exception = { }; |
| 2182 | int err; |
| 2183 | do { |
| 2184 | err = nfs4_handle_exception(server, |
| 2185 | _nfs4_server_capabilities(server, fhandle), |
| 2186 | &exception); |
| 2187 | } while (exception.retry); |
| 2188 | return err; |
| 2189 | } |
| 2190 | |
| 2191 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2192 | struct nfs_fsinfo *info) |
| 2193 | { |
| 2194 | struct nfs4_lookup_root_arg args = { |
| 2195 | .bitmask = nfs4_fattr_bitmap, |
| 2196 | }; |
| 2197 | struct nfs4_lookup_res res = { |
| 2198 | .server = server, |
| 2199 | .fattr = info->fattr, |
| 2200 | .fh = fhandle, |
| 2201 | }; |
| 2202 | struct rpc_message msg = { |
| 2203 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
| 2204 | .rpc_argp = &args, |
| 2205 | .rpc_resp = &res, |
| 2206 | }; |
| 2207 | |
| 2208 | nfs_fattr_init(info->fattr); |
| 2209 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 2210 | } |
| 2211 | |
| 2212 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2213 | struct nfs_fsinfo *info) |
| 2214 | { |
| 2215 | struct nfs4_exception exception = { }; |
| 2216 | int err; |
| 2217 | do { |
| 2218 | err = _nfs4_lookup_root(server, fhandle, info); |
| 2219 | switch (err) { |
| 2220 | case 0: |
| 2221 | case -NFS4ERR_WRONGSEC: |
| 2222 | break; |
| 2223 | default: |
| 2224 | err = nfs4_handle_exception(server, err, &exception); |
| 2225 | } |
| 2226 | } while (exception.retry); |
| 2227 | return err; |
| 2228 | } |
| 2229 | |
| 2230 | static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2231 | struct nfs_fsinfo *info, rpc_authflavor_t flavor) |
| 2232 | { |
| 2233 | struct rpc_auth *auth; |
| 2234 | int ret; |
| 2235 | |
| 2236 | auth = rpcauth_create(flavor, server->client); |
| 2237 | if (!auth) { |
| 2238 | ret = -EIO; |
| 2239 | goto out; |
| 2240 | } |
| 2241 | ret = nfs4_lookup_root(server, fhandle, info); |
| 2242 | out: |
| 2243 | return ret; |
| 2244 | } |
| 2245 | |
| 2246 | static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2247 | struct nfs_fsinfo *info) |
| 2248 | { |
| 2249 | int i, len, status = 0; |
| 2250 | rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS]; |
| 2251 | |
| 2252 | len = gss_mech_list_pseudoflavors(&flav_array[0]); |
| 2253 | flav_array[len] = RPC_AUTH_NULL; |
| 2254 | len += 1; |
| 2255 | |
| 2256 | for (i = 0; i < len; i++) { |
| 2257 | status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]); |
| 2258 | if (status == -NFS4ERR_WRONGSEC || status == -EACCES) |
| 2259 | continue; |
| 2260 | break; |
| 2261 | } |
| 2262 | /* |
| 2263 | * -EACCESS could mean that the user doesn't have correct permissions |
| 2264 | * to access the mount. It could also mean that we tried to mount |
| 2265 | * with a gss auth flavor, but rpc.gssd isn't running. Either way, |
| 2266 | * existing mount programs don't handle -EACCES very well so it should |
| 2267 | * be mapped to -EPERM instead. |
| 2268 | */ |
| 2269 | if (status == -EACCES) |
| 2270 | status = -EPERM; |
| 2271 | return status; |
| 2272 | } |
| 2273 | |
| 2274 | /* |
| 2275 | * get the file handle for the "/" directory on the server |
| 2276 | */ |
| 2277 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2278 | struct nfs_fsinfo *info) |
| 2279 | { |
| 2280 | int minor_version = server->nfs_client->cl_minorversion; |
| 2281 | int status = nfs4_lookup_root(server, fhandle, info); |
| 2282 | if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR)) |
| 2283 | /* |
| 2284 | * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM |
| 2285 | * by nfs4_map_errors() as this function exits. |
| 2286 | */ |
| 2287 | status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info); |
| 2288 | if (status == 0) |
| 2289 | status = nfs4_server_capabilities(server, fhandle); |
| 2290 | if (status == 0) |
| 2291 | status = nfs4_do_fsinfo(server, fhandle, info); |
| 2292 | return nfs4_map_errors(status); |
| 2293 | } |
| 2294 | |
| 2295 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); |
| 2296 | /* |
| 2297 | * Get locations and (maybe) other attributes of a referral. |
| 2298 | * Note that we'll actually follow the referral later when |
| 2299 | * we detect fsid mismatch in inode revalidation |
| 2300 | */ |
| 2301 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, |
| 2302 | struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
| 2303 | { |
| 2304 | int status = -ENOMEM; |
| 2305 | struct page *page = NULL; |
| 2306 | struct nfs4_fs_locations *locations = NULL; |
| 2307 | |
| 2308 | page = alloc_page(GFP_KERNEL); |
| 2309 | if (page == NULL) |
| 2310 | goto out; |
| 2311 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| 2312 | if (locations == NULL) |
| 2313 | goto out; |
| 2314 | |
| 2315 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
| 2316 | if (status != 0) |
| 2317 | goto out; |
| 2318 | /* Make sure server returned a different fsid for the referral */ |
| 2319 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { |
| 2320 | dprintk("%s: server did not return a different fsid for" |
| 2321 | " a referral at %s\n", __func__, name->name); |
| 2322 | status = -EIO; |
| 2323 | goto out; |
| 2324 | } |
| 2325 | /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ |
| 2326 | nfs_fixup_referral_attributes(&locations->fattr); |
| 2327 | |
| 2328 | /* replace the lookup nfs_fattr with the locations nfs_fattr */ |
| 2329 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); |
| 2330 | memset(fhandle, 0, sizeof(struct nfs_fh)); |
| 2331 | out: |
| 2332 | if (page) |
| 2333 | __free_page(page); |
| 2334 | kfree(locations); |
| 2335 | return status; |
| 2336 | } |
| 2337 | |
| 2338 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2339 | { |
| 2340 | struct nfs4_getattr_arg args = { |
| 2341 | .fh = fhandle, |
| 2342 | .bitmask = server->attr_bitmask, |
| 2343 | }; |
| 2344 | struct nfs4_getattr_res res = { |
| 2345 | .fattr = fattr, |
| 2346 | .server = server, |
| 2347 | }; |
| 2348 | struct rpc_message msg = { |
| 2349 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| 2350 | .rpc_argp = &args, |
| 2351 | .rpc_resp = &res, |
| 2352 | }; |
| 2353 | |
| 2354 | nfs_fattr_init(fattr); |
| 2355 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 2356 | } |
| 2357 | |
| 2358 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2359 | { |
| 2360 | struct nfs4_exception exception = { }; |
| 2361 | int err; |
| 2362 | do { |
| 2363 | err = nfs4_handle_exception(server, |
| 2364 | _nfs4_proc_getattr(server, fhandle, fattr), |
| 2365 | &exception); |
| 2366 | } while (exception.retry); |
| 2367 | return err; |
| 2368 | } |
| 2369 | |
| 2370 | /* |
| 2371 | * The file is not closed if it is opened due to the a request to change |
| 2372 | * the size of the file. The open call will not be needed once the |
| 2373 | * VFS layer lookup-intents are implemented. |
| 2374 | * |
| 2375 | * Close is called when the inode is destroyed. |
| 2376 | * If we haven't opened the file for O_WRONLY, we |
| 2377 | * need to in the size_change case to obtain a stateid. |
| 2378 | * |
| 2379 | * Got race? |
| 2380 | * Because OPEN is always done by name in nfsv4, it is |
| 2381 | * possible that we opened a different file by the same |
| 2382 | * name. We can recognize this race condition, but we |
| 2383 | * can't do anything about it besides returning an error. |
| 2384 | * |
| 2385 | * This will be fixed with VFS changes (lookup-intent). |
| 2386 | */ |
| 2387 | static int |
| 2388 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 2389 | struct iattr *sattr) |
| 2390 | { |
| 2391 | struct inode *inode = dentry->d_inode; |
| 2392 | struct rpc_cred *cred = NULL; |
| 2393 | struct nfs4_state *state = NULL; |
| 2394 | int status; |
| 2395 | |
| 2396 | if (pnfs_ld_layoutret_on_setattr(inode)) |
| 2397 | pnfs_return_layout(inode); |
| 2398 | |
| 2399 | nfs_fattr_init(fattr); |
| 2400 | |
| 2401 | /* Search for an existing open(O_WRITE) file */ |
| 2402 | if (sattr->ia_valid & ATTR_FILE) { |
| 2403 | struct nfs_open_context *ctx; |
| 2404 | |
| 2405 | ctx = nfs_file_open_context(sattr->ia_file); |
| 2406 | if (ctx) { |
| 2407 | cred = ctx->cred; |
| 2408 | state = ctx->state; |
| 2409 | } |
| 2410 | } |
| 2411 | |
| 2412 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
| 2413 | if (status == 0) |
| 2414 | nfs_setattr_update_inode(inode, sattr); |
| 2415 | return status; |
| 2416 | } |
| 2417 | |
| 2418 | static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, |
| 2419 | const struct qstr *name, struct nfs_fh *fhandle, |
| 2420 | struct nfs_fattr *fattr) |
| 2421 | { |
| 2422 | struct nfs_server *server = NFS_SERVER(dir); |
| 2423 | int status; |
| 2424 | struct nfs4_lookup_arg args = { |
| 2425 | .bitmask = server->attr_bitmask, |
| 2426 | .dir_fh = NFS_FH(dir), |
| 2427 | .name = name, |
| 2428 | }; |
| 2429 | struct nfs4_lookup_res res = { |
| 2430 | .server = server, |
| 2431 | .fattr = fattr, |
| 2432 | .fh = fhandle, |
| 2433 | }; |
| 2434 | struct rpc_message msg = { |
| 2435 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| 2436 | .rpc_argp = &args, |
| 2437 | .rpc_resp = &res, |
| 2438 | }; |
| 2439 | |
| 2440 | nfs_fattr_init(fattr); |
| 2441 | |
| 2442 | dprintk("NFS call lookup %s\n", name->name); |
| 2443 | status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 2444 | dprintk("NFS reply lookup: %d\n", status); |
| 2445 | return status; |
| 2446 | } |
| 2447 | |
| 2448 | void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh) |
| 2449 | { |
| 2450 | memset(fh, 0, sizeof(struct nfs_fh)); |
| 2451 | fattr->fsid.major = 1; |
| 2452 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| 2453 | NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT; |
| 2454 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 2455 | fattr->nlink = 2; |
| 2456 | } |
| 2457 | |
| 2458 | static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name, |
| 2459 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 2460 | { |
| 2461 | struct nfs4_exception exception = { }; |
| 2462 | int err; |
| 2463 | do { |
| 2464 | int status; |
| 2465 | |
| 2466 | status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr); |
| 2467 | switch (status) { |
| 2468 | case -NFS4ERR_BADNAME: |
| 2469 | return -ENOENT; |
| 2470 | case -NFS4ERR_MOVED: |
| 2471 | return nfs4_get_referral(dir, name, fattr, fhandle); |
| 2472 | case -NFS4ERR_WRONGSEC: |
| 2473 | nfs_fixup_secinfo_attributes(fattr, fhandle); |
| 2474 | } |
| 2475 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2476 | status, &exception); |
| 2477 | } while (exception.retry); |
| 2478 | return err; |
| 2479 | } |
| 2480 | |
| 2481 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 2482 | { |
| 2483 | struct nfs_server *server = NFS_SERVER(inode); |
| 2484 | struct nfs4_accessargs args = { |
| 2485 | .fh = NFS_FH(inode), |
| 2486 | .bitmask = server->attr_bitmask, |
| 2487 | }; |
| 2488 | struct nfs4_accessres res = { |
| 2489 | .server = server, |
| 2490 | }; |
| 2491 | struct rpc_message msg = { |
| 2492 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
| 2493 | .rpc_argp = &args, |
| 2494 | .rpc_resp = &res, |
| 2495 | .rpc_cred = entry->cred, |
| 2496 | }; |
| 2497 | int mode = entry->mask; |
| 2498 | int status; |
| 2499 | |
| 2500 | /* |
| 2501 | * Determine which access bits we want to ask for... |
| 2502 | */ |
| 2503 | if (mode & MAY_READ) |
| 2504 | args.access |= NFS4_ACCESS_READ; |
| 2505 | if (S_ISDIR(inode->i_mode)) { |
| 2506 | if (mode & MAY_WRITE) |
| 2507 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; |
| 2508 | if (mode & MAY_EXEC) |
| 2509 | args.access |= NFS4_ACCESS_LOOKUP; |
| 2510 | } else { |
| 2511 | if (mode & MAY_WRITE) |
| 2512 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; |
| 2513 | if (mode & MAY_EXEC) |
| 2514 | args.access |= NFS4_ACCESS_EXECUTE; |
| 2515 | } |
| 2516 | |
| 2517 | res.fattr = nfs_alloc_fattr(); |
| 2518 | if (res.fattr == NULL) |
| 2519 | return -ENOMEM; |
| 2520 | |
| 2521 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 2522 | if (!status) { |
| 2523 | entry->mask = 0; |
| 2524 | if (res.access & NFS4_ACCESS_READ) |
| 2525 | entry->mask |= MAY_READ; |
| 2526 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) |
| 2527 | entry->mask |= MAY_WRITE; |
| 2528 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) |
| 2529 | entry->mask |= MAY_EXEC; |
| 2530 | nfs_refresh_inode(inode, res.fattr); |
| 2531 | } |
| 2532 | nfs_free_fattr(res.fattr); |
| 2533 | return status; |
| 2534 | } |
| 2535 | |
| 2536 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 2537 | { |
| 2538 | struct nfs4_exception exception = { }; |
| 2539 | int err; |
| 2540 | do { |
| 2541 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2542 | _nfs4_proc_access(inode, entry), |
| 2543 | &exception); |
| 2544 | } while (exception.retry); |
| 2545 | return err; |
| 2546 | } |
| 2547 | |
| 2548 | /* |
| 2549 | * TODO: For the time being, we don't try to get any attributes |
| 2550 | * along with any of the zero-copy operations READ, READDIR, |
| 2551 | * READLINK, WRITE. |
| 2552 | * |
| 2553 | * In the case of the first three, we want to put the GETATTR |
| 2554 | * after the read-type operation -- this is because it is hard |
| 2555 | * to predict the length of a GETATTR response in v4, and thus |
| 2556 | * align the READ data correctly. This means that the GETATTR |
| 2557 | * may end up partially falling into the page cache, and we should |
| 2558 | * shift it into the 'tail' of the xdr_buf before processing. |
| 2559 | * To do this efficiently, we need to know the total length |
| 2560 | * of data received, which doesn't seem to be available outside |
| 2561 | * of the RPC layer. |
| 2562 | * |
| 2563 | * In the case of WRITE, we also want to put the GETATTR after |
| 2564 | * the operation -- in this case because we want to make sure |
| 2565 | * we get the post-operation mtime and size. This means that |
| 2566 | * we can't use xdr_encode_pages() as written: we need a variant |
| 2567 | * of it which would leave room in the 'tail' iovec. |
| 2568 | * |
| 2569 | * Both of these changes to the XDR layer would in fact be quite |
| 2570 | * minor, but I decided to leave them for a subsequent patch. |
| 2571 | */ |
| 2572 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 2573 | unsigned int pgbase, unsigned int pglen) |
| 2574 | { |
| 2575 | struct nfs4_readlink args = { |
| 2576 | .fh = NFS_FH(inode), |
| 2577 | .pgbase = pgbase, |
| 2578 | .pglen = pglen, |
| 2579 | .pages = &page, |
| 2580 | }; |
| 2581 | struct nfs4_readlink_res res; |
| 2582 | struct rpc_message msg = { |
| 2583 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| 2584 | .rpc_argp = &args, |
| 2585 | .rpc_resp = &res, |
| 2586 | }; |
| 2587 | |
| 2588 | return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); |
| 2589 | } |
| 2590 | |
| 2591 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 2592 | unsigned int pgbase, unsigned int pglen) |
| 2593 | { |
| 2594 | struct nfs4_exception exception = { }; |
| 2595 | int err; |
| 2596 | do { |
| 2597 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2598 | _nfs4_proc_readlink(inode, page, pgbase, pglen), |
| 2599 | &exception); |
| 2600 | } while (exception.retry); |
| 2601 | return err; |
| 2602 | } |
| 2603 | |
| 2604 | /* |
| 2605 | * Got race? |
| 2606 | * We will need to arrange for the VFS layer to provide an atomic open. |
| 2607 | * Until then, this create/open method is prone to inefficiency and race |
| 2608 | * conditions due to the lookup, create, and open VFS calls from sys_open() |
| 2609 | * placed on the wire. |
| 2610 | * |
| 2611 | * Given the above sorry state of affairs, I'm simply sending an OPEN. |
| 2612 | * The file will be opened again in the subsequent VFS open call |
| 2613 | * (nfs4_proc_file_open). |
| 2614 | * |
| 2615 | * The open for read will just hang around to be used by any process that |
| 2616 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. |
| 2617 | */ |
| 2618 | |
| 2619 | static int |
| 2620 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| 2621 | int flags, struct nfs_open_context *ctx) |
| 2622 | { |
| 2623 | struct dentry *de = dentry; |
| 2624 | struct nfs4_state *state; |
| 2625 | struct rpc_cred *cred = NULL; |
| 2626 | fmode_t fmode = 0; |
| 2627 | int status = 0; |
| 2628 | |
| 2629 | if (ctx != NULL) { |
| 2630 | cred = ctx->cred; |
| 2631 | de = ctx->dentry; |
| 2632 | fmode = ctx->mode; |
| 2633 | } |
| 2634 | sattr->ia_mode &= ~current_umask(); |
| 2635 | state = nfs4_do_open(dir, de, fmode, flags, sattr, cred); |
| 2636 | d_drop(dentry); |
| 2637 | if (IS_ERR(state)) { |
| 2638 | status = PTR_ERR(state); |
| 2639 | goto out; |
| 2640 | } |
| 2641 | d_add(dentry, igrab(state->inode)); |
| 2642 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
| 2643 | if (ctx != NULL) |
| 2644 | ctx->state = state; |
| 2645 | else |
| 2646 | nfs4_close_sync(state, fmode); |
| 2647 | out: |
| 2648 | return status; |
| 2649 | } |
| 2650 | |
| 2651 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 2652 | { |
| 2653 | struct nfs_server *server = NFS_SERVER(dir); |
| 2654 | struct nfs_removeargs args = { |
| 2655 | .fh = NFS_FH(dir), |
| 2656 | .name.len = name->len, |
| 2657 | .name.name = name->name, |
| 2658 | .bitmask = server->attr_bitmask, |
| 2659 | }; |
| 2660 | struct nfs_removeres res = { |
| 2661 | .server = server, |
| 2662 | }; |
| 2663 | struct rpc_message msg = { |
| 2664 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| 2665 | .rpc_argp = &args, |
| 2666 | .rpc_resp = &res, |
| 2667 | }; |
| 2668 | int status = -ENOMEM; |
| 2669 | |
| 2670 | res.dir_attr = nfs_alloc_fattr(); |
| 2671 | if (res.dir_attr == NULL) |
| 2672 | goto out; |
| 2673 | |
| 2674 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); |
| 2675 | if (status == 0) { |
| 2676 | update_changeattr(dir, &res.cinfo); |
| 2677 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 2678 | } |
| 2679 | nfs_free_fattr(res.dir_attr); |
| 2680 | out: |
| 2681 | return status; |
| 2682 | } |
| 2683 | |
| 2684 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 2685 | { |
| 2686 | struct nfs4_exception exception = { }; |
| 2687 | int err; |
| 2688 | do { |
| 2689 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2690 | _nfs4_proc_remove(dir, name), |
| 2691 | &exception); |
| 2692 | } while (exception.retry); |
| 2693 | return err; |
| 2694 | } |
| 2695 | |
| 2696 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| 2697 | { |
| 2698 | struct nfs_server *server = NFS_SERVER(dir); |
| 2699 | struct nfs_removeargs *args = msg->rpc_argp; |
| 2700 | struct nfs_removeres *res = msg->rpc_resp; |
| 2701 | |
| 2702 | args->bitmask = server->cache_consistency_bitmask; |
| 2703 | res->server = server; |
| 2704 | res->seq_res.sr_slot = NULL; |
| 2705 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| 2706 | } |
| 2707 | |
| 2708 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| 2709 | { |
| 2710 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
| 2711 | |
| 2712 | if (!nfs4_sequence_done(task, &res->seq_res)) |
| 2713 | return 0; |
| 2714 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
| 2715 | return 0; |
| 2716 | update_changeattr(dir, &res->cinfo); |
| 2717 | nfs_post_op_update_inode(dir, res->dir_attr); |
| 2718 | return 1; |
| 2719 | } |
| 2720 | |
| 2721 | static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
| 2722 | { |
| 2723 | struct nfs_server *server = NFS_SERVER(dir); |
| 2724 | struct nfs_renameargs *arg = msg->rpc_argp; |
| 2725 | struct nfs_renameres *res = msg->rpc_resp; |
| 2726 | |
| 2727 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; |
| 2728 | arg->bitmask = server->attr_bitmask; |
| 2729 | res->server = server; |
| 2730 | } |
| 2731 | |
| 2732 | static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| 2733 | struct inode *new_dir) |
| 2734 | { |
| 2735 | struct nfs_renameres *res = task->tk_msg.rpc_resp; |
| 2736 | |
| 2737 | if (!nfs4_sequence_done(task, &res->seq_res)) |
| 2738 | return 0; |
| 2739 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
| 2740 | return 0; |
| 2741 | |
| 2742 | update_changeattr(old_dir, &res->old_cinfo); |
| 2743 | nfs_post_op_update_inode(old_dir, res->old_fattr); |
| 2744 | update_changeattr(new_dir, &res->new_cinfo); |
| 2745 | nfs_post_op_update_inode(new_dir, res->new_fattr); |
| 2746 | return 1; |
| 2747 | } |
| 2748 | |
| 2749 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 2750 | struct inode *new_dir, struct qstr *new_name) |
| 2751 | { |
| 2752 | struct nfs_server *server = NFS_SERVER(old_dir); |
| 2753 | struct nfs_renameargs arg = { |
| 2754 | .old_dir = NFS_FH(old_dir), |
| 2755 | .new_dir = NFS_FH(new_dir), |
| 2756 | .old_name = old_name, |
| 2757 | .new_name = new_name, |
| 2758 | .bitmask = server->attr_bitmask, |
| 2759 | }; |
| 2760 | struct nfs_renameres res = { |
| 2761 | .server = server, |
| 2762 | }; |
| 2763 | struct rpc_message msg = { |
| 2764 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], |
| 2765 | .rpc_argp = &arg, |
| 2766 | .rpc_resp = &res, |
| 2767 | }; |
| 2768 | int status = -ENOMEM; |
| 2769 | |
| 2770 | res.old_fattr = nfs_alloc_fattr(); |
| 2771 | res.new_fattr = nfs_alloc_fattr(); |
| 2772 | if (res.old_fattr == NULL || res.new_fattr == NULL) |
| 2773 | goto out; |
| 2774 | |
| 2775 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| 2776 | if (!status) { |
| 2777 | update_changeattr(old_dir, &res.old_cinfo); |
| 2778 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
| 2779 | update_changeattr(new_dir, &res.new_cinfo); |
| 2780 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
| 2781 | } |
| 2782 | out: |
| 2783 | nfs_free_fattr(res.new_fattr); |
| 2784 | nfs_free_fattr(res.old_fattr); |
| 2785 | return status; |
| 2786 | } |
| 2787 | |
| 2788 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 2789 | struct inode *new_dir, struct qstr *new_name) |
| 2790 | { |
| 2791 | struct nfs4_exception exception = { }; |
| 2792 | int err; |
| 2793 | do { |
| 2794 | err = nfs4_handle_exception(NFS_SERVER(old_dir), |
| 2795 | _nfs4_proc_rename(old_dir, old_name, |
| 2796 | new_dir, new_name), |
| 2797 | &exception); |
| 2798 | } while (exception.retry); |
| 2799 | return err; |
| 2800 | } |
| 2801 | |
| 2802 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 2803 | { |
| 2804 | struct nfs_server *server = NFS_SERVER(inode); |
| 2805 | struct nfs4_link_arg arg = { |
| 2806 | .fh = NFS_FH(inode), |
| 2807 | .dir_fh = NFS_FH(dir), |
| 2808 | .name = name, |
| 2809 | .bitmask = server->attr_bitmask, |
| 2810 | }; |
| 2811 | struct nfs4_link_res res = { |
| 2812 | .server = server, |
| 2813 | }; |
| 2814 | struct rpc_message msg = { |
| 2815 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| 2816 | .rpc_argp = &arg, |
| 2817 | .rpc_resp = &res, |
| 2818 | }; |
| 2819 | int status = -ENOMEM; |
| 2820 | |
| 2821 | res.fattr = nfs_alloc_fattr(); |
| 2822 | res.dir_attr = nfs_alloc_fattr(); |
| 2823 | if (res.fattr == NULL || res.dir_attr == NULL) |
| 2824 | goto out; |
| 2825 | |
| 2826 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| 2827 | if (!status) { |
| 2828 | update_changeattr(dir, &res.cinfo); |
| 2829 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 2830 | nfs_post_op_update_inode(inode, res.fattr); |
| 2831 | } |
| 2832 | out: |
| 2833 | nfs_free_fattr(res.dir_attr); |
| 2834 | nfs_free_fattr(res.fattr); |
| 2835 | return status; |
| 2836 | } |
| 2837 | |
| 2838 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 2839 | { |
| 2840 | struct nfs4_exception exception = { }; |
| 2841 | int err; |
| 2842 | do { |
| 2843 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2844 | _nfs4_proc_link(inode, dir, name), |
| 2845 | &exception); |
| 2846 | } while (exception.retry); |
| 2847 | return err; |
| 2848 | } |
| 2849 | |
| 2850 | struct nfs4_createdata { |
| 2851 | struct rpc_message msg; |
| 2852 | struct nfs4_create_arg arg; |
| 2853 | struct nfs4_create_res res; |
| 2854 | struct nfs_fh fh; |
| 2855 | struct nfs_fattr fattr; |
| 2856 | struct nfs_fattr dir_fattr; |
| 2857 | }; |
| 2858 | |
| 2859 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, |
| 2860 | struct qstr *name, struct iattr *sattr, u32 ftype) |
| 2861 | { |
| 2862 | struct nfs4_createdata *data; |
| 2863 | |
| 2864 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 2865 | if (data != NULL) { |
| 2866 | struct nfs_server *server = NFS_SERVER(dir); |
| 2867 | |
| 2868 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; |
| 2869 | data->msg.rpc_argp = &data->arg; |
| 2870 | data->msg.rpc_resp = &data->res; |
| 2871 | data->arg.dir_fh = NFS_FH(dir); |
| 2872 | data->arg.server = server; |
| 2873 | data->arg.name = name; |
| 2874 | data->arg.attrs = sattr; |
| 2875 | data->arg.ftype = ftype; |
| 2876 | data->arg.bitmask = server->attr_bitmask; |
| 2877 | data->res.server = server; |
| 2878 | data->res.fh = &data->fh; |
| 2879 | data->res.fattr = &data->fattr; |
| 2880 | data->res.dir_fattr = &data->dir_fattr; |
| 2881 | nfs_fattr_init(data->res.fattr); |
| 2882 | nfs_fattr_init(data->res.dir_fattr); |
| 2883 | } |
| 2884 | return data; |
| 2885 | } |
| 2886 | |
| 2887 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) |
| 2888 | { |
| 2889 | int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, |
| 2890 | &data->arg.seq_args, &data->res.seq_res, 1); |
| 2891 | if (status == 0) { |
| 2892 | update_changeattr(dir, &data->res.dir_cinfo); |
| 2893 | nfs_post_op_update_inode(dir, data->res.dir_fattr); |
| 2894 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); |
| 2895 | } |
| 2896 | return status; |
| 2897 | } |
| 2898 | |
| 2899 | static void nfs4_free_createdata(struct nfs4_createdata *data) |
| 2900 | { |
| 2901 | kfree(data); |
| 2902 | } |
| 2903 | |
| 2904 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| 2905 | struct page *page, unsigned int len, struct iattr *sattr) |
| 2906 | { |
| 2907 | struct nfs4_createdata *data; |
| 2908 | int status = -ENAMETOOLONG; |
| 2909 | |
| 2910 | if (len > NFS4_MAXPATHLEN) |
| 2911 | goto out; |
| 2912 | |
| 2913 | status = -ENOMEM; |
| 2914 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); |
| 2915 | if (data == NULL) |
| 2916 | goto out; |
| 2917 | |
| 2918 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; |
| 2919 | data->arg.u.symlink.pages = &page; |
| 2920 | data->arg.u.symlink.len = len; |
| 2921 | |
| 2922 | status = nfs4_do_create(dir, dentry, data); |
| 2923 | |
| 2924 | nfs4_free_createdata(data); |
| 2925 | out: |
| 2926 | return status; |
| 2927 | } |
| 2928 | |
| 2929 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| 2930 | struct page *page, unsigned int len, struct iattr *sattr) |
| 2931 | { |
| 2932 | struct nfs4_exception exception = { }; |
| 2933 | int err; |
| 2934 | do { |
| 2935 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2936 | _nfs4_proc_symlink(dir, dentry, page, |
| 2937 | len, sattr), |
| 2938 | &exception); |
| 2939 | } while (exception.retry); |
| 2940 | return err; |
| 2941 | } |
| 2942 | |
| 2943 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 2944 | struct iattr *sattr) |
| 2945 | { |
| 2946 | struct nfs4_createdata *data; |
| 2947 | int status = -ENOMEM; |
| 2948 | |
| 2949 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
| 2950 | if (data == NULL) |
| 2951 | goto out; |
| 2952 | |
| 2953 | status = nfs4_do_create(dir, dentry, data); |
| 2954 | |
| 2955 | nfs4_free_createdata(data); |
| 2956 | out: |
| 2957 | return status; |
| 2958 | } |
| 2959 | |
| 2960 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 2961 | struct iattr *sattr) |
| 2962 | { |
| 2963 | struct nfs4_exception exception = { }; |
| 2964 | int err; |
| 2965 | |
| 2966 | sattr->ia_mode &= ~current_umask(); |
| 2967 | do { |
| 2968 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2969 | _nfs4_proc_mkdir(dir, dentry, sattr), |
| 2970 | &exception); |
| 2971 | } while (exception.retry); |
| 2972 | return err; |
| 2973 | } |
| 2974 | |
| 2975 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 2976 | u64 cookie, struct page **pages, unsigned int count, int plus) |
| 2977 | { |
| 2978 | struct inode *dir = dentry->d_inode; |
| 2979 | struct nfs4_readdir_arg args = { |
| 2980 | .fh = NFS_FH(dir), |
| 2981 | .pages = pages, |
| 2982 | .pgbase = 0, |
| 2983 | .count = count, |
| 2984 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
| 2985 | .plus = plus, |
| 2986 | }; |
| 2987 | struct nfs4_readdir_res res; |
| 2988 | struct rpc_message msg = { |
| 2989 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
| 2990 | .rpc_argp = &args, |
| 2991 | .rpc_resp = &res, |
| 2992 | .rpc_cred = cred, |
| 2993 | }; |
| 2994 | int status; |
| 2995 | |
| 2996 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
| 2997 | dentry->d_parent->d_name.name, |
| 2998 | dentry->d_name.name, |
| 2999 | (unsigned long long)cookie); |
| 3000 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
| 3001 | res.pgbase = args.pgbase; |
| 3002 | status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); |
| 3003 | if (status >= 0) { |
| 3004 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); |
| 3005 | status += args.pgbase; |
| 3006 | } |
| 3007 | |
| 3008 | nfs_invalidate_atime(dir); |
| 3009 | |
| 3010 | dprintk("%s: returns %d\n", __func__, status); |
| 3011 | return status; |
| 3012 | } |
| 3013 | |
| 3014 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 3015 | u64 cookie, struct page **pages, unsigned int count, int plus) |
| 3016 | { |
| 3017 | struct nfs4_exception exception = { }; |
| 3018 | int err; |
| 3019 | do { |
| 3020 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), |
| 3021 | _nfs4_proc_readdir(dentry, cred, cookie, |
| 3022 | pages, count, plus), |
| 3023 | &exception); |
| 3024 | } while (exception.retry); |
| 3025 | return err; |
| 3026 | } |
| 3027 | |
| 3028 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 3029 | struct iattr *sattr, dev_t rdev) |
| 3030 | { |
| 3031 | struct nfs4_createdata *data; |
| 3032 | int mode = sattr->ia_mode; |
| 3033 | int status = -ENOMEM; |
| 3034 | |
| 3035 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); |
| 3036 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); |
| 3037 | |
| 3038 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); |
| 3039 | if (data == NULL) |
| 3040 | goto out; |
| 3041 | |
| 3042 | if (S_ISFIFO(mode)) |
| 3043 | data->arg.ftype = NF4FIFO; |
| 3044 | else if (S_ISBLK(mode)) { |
| 3045 | data->arg.ftype = NF4BLK; |
| 3046 | data->arg.u.device.specdata1 = MAJOR(rdev); |
| 3047 | data->arg.u.device.specdata2 = MINOR(rdev); |
| 3048 | } |
| 3049 | else if (S_ISCHR(mode)) { |
| 3050 | data->arg.ftype = NF4CHR; |
| 3051 | data->arg.u.device.specdata1 = MAJOR(rdev); |
| 3052 | data->arg.u.device.specdata2 = MINOR(rdev); |
| 3053 | } |
| 3054 | |
| 3055 | status = nfs4_do_create(dir, dentry, data); |
| 3056 | |
| 3057 | nfs4_free_createdata(data); |
| 3058 | out: |
| 3059 | return status; |
| 3060 | } |
| 3061 | |
| 3062 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 3063 | struct iattr *sattr, dev_t rdev) |
| 3064 | { |
| 3065 | struct nfs4_exception exception = { }; |
| 3066 | int err; |
| 3067 | |
| 3068 | sattr->ia_mode &= ~current_umask(); |
| 3069 | do { |
| 3070 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 3071 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), |
| 3072 | &exception); |
| 3073 | } while (exception.retry); |
| 3074 | return err; |
| 3075 | } |
| 3076 | |
| 3077 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 3078 | struct nfs_fsstat *fsstat) |
| 3079 | { |
| 3080 | struct nfs4_statfs_arg args = { |
| 3081 | .fh = fhandle, |
| 3082 | .bitmask = server->attr_bitmask, |
| 3083 | }; |
| 3084 | struct nfs4_statfs_res res = { |
| 3085 | .fsstat = fsstat, |
| 3086 | }; |
| 3087 | struct rpc_message msg = { |
| 3088 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| 3089 | .rpc_argp = &args, |
| 3090 | .rpc_resp = &res, |
| 3091 | }; |
| 3092 | |
| 3093 | nfs_fattr_init(fsstat->fattr); |
| 3094 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 3095 | } |
| 3096 | |
| 3097 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
| 3098 | { |
| 3099 | struct nfs4_exception exception = { }; |
| 3100 | int err; |
| 3101 | do { |
| 3102 | err = nfs4_handle_exception(server, |
| 3103 | _nfs4_proc_statfs(server, fhandle, fsstat), |
| 3104 | &exception); |
| 3105 | } while (exception.retry); |
| 3106 | return err; |
| 3107 | } |
| 3108 | |
| 3109 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 3110 | struct nfs_fsinfo *fsinfo) |
| 3111 | { |
| 3112 | struct nfs4_fsinfo_arg args = { |
| 3113 | .fh = fhandle, |
| 3114 | .bitmask = server->attr_bitmask, |
| 3115 | }; |
| 3116 | struct nfs4_fsinfo_res res = { |
| 3117 | .fsinfo = fsinfo, |
| 3118 | }; |
| 3119 | struct rpc_message msg = { |
| 3120 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| 3121 | .rpc_argp = &args, |
| 3122 | .rpc_resp = &res, |
| 3123 | }; |
| 3124 | |
| 3125 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 3126 | } |
| 3127 | |
| 3128 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 3129 | { |
| 3130 | struct nfs4_exception exception = { }; |
| 3131 | int err; |
| 3132 | |
| 3133 | do { |
| 3134 | err = nfs4_handle_exception(server, |
| 3135 | _nfs4_do_fsinfo(server, fhandle, fsinfo), |
| 3136 | &exception); |
| 3137 | } while (exception.retry); |
| 3138 | return err; |
| 3139 | } |
| 3140 | |
| 3141 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 3142 | { |
| 3143 | nfs_fattr_init(fsinfo->fattr); |
| 3144 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
| 3145 | } |
| 3146 | |
| 3147 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 3148 | struct nfs_pathconf *pathconf) |
| 3149 | { |
| 3150 | struct nfs4_pathconf_arg args = { |
| 3151 | .fh = fhandle, |
| 3152 | .bitmask = server->attr_bitmask, |
| 3153 | }; |
| 3154 | struct nfs4_pathconf_res res = { |
| 3155 | .pathconf = pathconf, |
| 3156 | }; |
| 3157 | struct rpc_message msg = { |
| 3158 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| 3159 | .rpc_argp = &args, |
| 3160 | .rpc_resp = &res, |
| 3161 | }; |
| 3162 | |
| 3163 | /* None of the pathconf attributes are mandatory to implement */ |
| 3164 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
| 3165 | memset(pathconf, 0, sizeof(*pathconf)); |
| 3166 | return 0; |
| 3167 | } |
| 3168 | |
| 3169 | nfs_fattr_init(pathconf->fattr); |
| 3170 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 3171 | } |
| 3172 | |
| 3173 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 3174 | struct nfs_pathconf *pathconf) |
| 3175 | { |
| 3176 | struct nfs4_exception exception = { }; |
| 3177 | int err; |
| 3178 | |
| 3179 | do { |
| 3180 | err = nfs4_handle_exception(server, |
| 3181 | _nfs4_proc_pathconf(server, fhandle, pathconf), |
| 3182 | &exception); |
| 3183 | } while (exception.retry); |
| 3184 | return err; |
| 3185 | } |
| 3186 | |
| 3187 | void __nfs4_read_done_cb(struct nfs_read_data *data) |
| 3188 | { |
| 3189 | nfs_invalidate_atime(data->inode); |
| 3190 | } |
| 3191 | |
| 3192 | static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data) |
| 3193 | { |
| 3194 | struct nfs_server *server = NFS_SERVER(data->inode); |
| 3195 | |
| 3196 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
| 3197 | rpc_restart_call_prepare(task); |
| 3198 | return -EAGAIN; |
| 3199 | } |
| 3200 | |
| 3201 | __nfs4_read_done_cb(data); |
| 3202 | if (task->tk_status > 0) |
| 3203 | renew_lease(server, data->timestamp); |
| 3204 | return 0; |
| 3205 | } |
| 3206 | |
| 3207 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
| 3208 | { |
| 3209 | |
| 3210 | dprintk("--> %s\n", __func__); |
| 3211 | |
| 3212 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3213 | return -EAGAIN; |
| 3214 | |
| 3215 | return data->read_done_cb ? data->read_done_cb(task, data) : |
| 3216 | nfs4_read_done_cb(task, data); |
| 3217 | } |
| 3218 | |
| 3219 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
| 3220 | { |
| 3221 | data->timestamp = jiffies; |
| 3222 | data->read_done_cb = nfs4_read_done_cb; |
| 3223 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
| 3224 | } |
| 3225 | |
| 3226 | /* Reset the the nfs_read_data to send the read to the MDS. */ |
| 3227 | void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data) |
| 3228 | { |
| 3229 | dprintk("%s Reset task for i/o through\n", __func__); |
| 3230 | put_lseg(data->lseg); |
| 3231 | data->lseg = NULL; |
| 3232 | /* offsets will differ in the dense stripe case */ |
| 3233 | data->args.offset = data->mds_offset; |
| 3234 | data->ds_clp = NULL; |
| 3235 | data->args.fh = NFS_FH(data->inode); |
| 3236 | data->read_done_cb = nfs4_read_done_cb; |
| 3237 | task->tk_ops = data->mds_ops; |
| 3238 | rpc_task_reset_client(task, NFS_CLIENT(data->inode)); |
| 3239 | } |
| 3240 | EXPORT_SYMBOL_GPL(nfs4_reset_read); |
| 3241 | |
| 3242 | static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data) |
| 3243 | { |
| 3244 | struct inode *inode = data->inode; |
| 3245 | |
| 3246 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
| 3247 | rpc_restart_call_prepare(task); |
| 3248 | return -EAGAIN; |
| 3249 | } |
| 3250 | if (task->tk_status >= 0) { |
| 3251 | renew_lease(NFS_SERVER(inode), data->timestamp); |
| 3252 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
| 3253 | } |
| 3254 | return 0; |
| 3255 | } |
| 3256 | |
| 3257 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
| 3258 | { |
| 3259 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3260 | return -EAGAIN; |
| 3261 | return data->write_done_cb ? data->write_done_cb(task, data) : |
| 3262 | nfs4_write_done_cb(task, data); |
| 3263 | } |
| 3264 | |
| 3265 | /* Reset the the nfs_write_data to send the write to the MDS. */ |
| 3266 | void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data) |
| 3267 | { |
| 3268 | dprintk("%s Reset task for i/o through\n", __func__); |
| 3269 | put_lseg(data->lseg); |
| 3270 | data->lseg = NULL; |
| 3271 | data->ds_clp = NULL; |
| 3272 | data->write_done_cb = nfs4_write_done_cb; |
| 3273 | data->args.fh = NFS_FH(data->inode); |
| 3274 | data->args.bitmask = data->res.server->cache_consistency_bitmask; |
| 3275 | data->args.offset = data->mds_offset; |
| 3276 | data->res.fattr = &data->fattr; |
| 3277 | task->tk_ops = data->mds_ops; |
| 3278 | rpc_task_reset_client(task, NFS_CLIENT(data->inode)); |
| 3279 | } |
| 3280 | EXPORT_SYMBOL_GPL(nfs4_reset_write); |
| 3281 | |
| 3282 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| 3283 | { |
| 3284 | struct nfs_server *server = NFS_SERVER(data->inode); |
| 3285 | |
| 3286 | if (data->lseg) { |
| 3287 | data->args.bitmask = NULL; |
| 3288 | data->res.fattr = NULL; |
| 3289 | } else |
| 3290 | data->args.bitmask = server->cache_consistency_bitmask; |
| 3291 | if (!data->write_done_cb) |
| 3292 | data->write_done_cb = nfs4_write_done_cb; |
| 3293 | data->res.server = server; |
| 3294 | data->timestamp = jiffies; |
| 3295 | |
| 3296 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
| 3297 | } |
| 3298 | |
| 3299 | static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data) |
| 3300 | { |
| 3301 | struct inode *inode = data->inode; |
| 3302 | |
| 3303 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
| 3304 | rpc_restart_call_prepare(task); |
| 3305 | return -EAGAIN; |
| 3306 | } |
| 3307 | nfs_refresh_inode(inode, data->res.fattr); |
| 3308 | return 0; |
| 3309 | } |
| 3310 | |
| 3311 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
| 3312 | { |
| 3313 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3314 | return -EAGAIN; |
| 3315 | return data->write_done_cb(task, data); |
| 3316 | } |
| 3317 | |
| 3318 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| 3319 | { |
| 3320 | struct nfs_server *server = NFS_SERVER(data->inode); |
| 3321 | |
| 3322 | if (data->lseg) { |
| 3323 | data->args.bitmask = NULL; |
| 3324 | data->res.fattr = NULL; |
| 3325 | } else |
| 3326 | data->args.bitmask = server->cache_consistency_bitmask; |
| 3327 | if (!data->write_done_cb) |
| 3328 | data->write_done_cb = nfs4_commit_done_cb; |
| 3329 | data->res.server = server; |
| 3330 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
| 3331 | } |
| 3332 | |
| 3333 | struct nfs4_renewdata { |
| 3334 | struct nfs_client *client; |
| 3335 | unsigned long timestamp; |
| 3336 | }; |
| 3337 | |
| 3338 | /* |
| 3339 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
| 3340 | * standalone procedure for queueing an asynchronous RENEW. |
| 3341 | */ |
| 3342 | static void nfs4_renew_release(void *calldata) |
| 3343 | { |
| 3344 | struct nfs4_renewdata *data = calldata; |
| 3345 | struct nfs_client *clp = data->client; |
| 3346 | |
| 3347 | if (atomic_read(&clp->cl_count) > 1) |
| 3348 | nfs4_schedule_state_renewal(clp); |
| 3349 | nfs_put_client(clp); |
| 3350 | kfree(data); |
| 3351 | } |
| 3352 | |
| 3353 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
| 3354 | { |
| 3355 | struct nfs4_renewdata *data = calldata; |
| 3356 | struct nfs_client *clp = data->client; |
| 3357 | unsigned long timestamp = data->timestamp; |
| 3358 | |
| 3359 | if (task->tk_status < 0) { |
| 3360 | /* Unless we're shutting down, schedule state recovery! */ |
| 3361 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) |
| 3362 | return; |
| 3363 | if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { |
| 3364 | nfs4_schedule_lease_recovery(clp); |
| 3365 | return; |
| 3366 | } |
| 3367 | nfs4_schedule_path_down_recovery(clp); |
| 3368 | } |
| 3369 | do_renew_lease(clp, timestamp); |
| 3370 | } |
| 3371 | |
| 3372 | static const struct rpc_call_ops nfs4_renew_ops = { |
| 3373 | .rpc_call_done = nfs4_renew_done, |
| 3374 | .rpc_release = nfs4_renew_release, |
| 3375 | }; |
| 3376 | |
| 3377 | static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) |
| 3378 | { |
| 3379 | struct rpc_message msg = { |
| 3380 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 3381 | .rpc_argp = clp, |
| 3382 | .rpc_cred = cred, |
| 3383 | }; |
| 3384 | struct nfs4_renewdata *data; |
| 3385 | |
| 3386 | if (renew_flags == 0) |
| 3387 | return 0; |
| 3388 | if (!atomic_inc_not_zero(&clp->cl_count)) |
| 3389 | return -EIO; |
| 3390 | data = kmalloc(sizeof(*data), GFP_NOFS); |
| 3391 | if (data == NULL) |
| 3392 | return -ENOMEM; |
| 3393 | data->client = clp; |
| 3394 | data->timestamp = jiffies; |
| 3395 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
| 3396 | &nfs4_renew_ops, data); |
| 3397 | } |
| 3398 | |
| 3399 | static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
| 3400 | { |
| 3401 | struct rpc_message msg = { |
| 3402 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 3403 | .rpc_argp = clp, |
| 3404 | .rpc_cred = cred, |
| 3405 | }; |
| 3406 | unsigned long now = jiffies; |
| 3407 | int status; |
| 3408 | |
| 3409 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 3410 | if (status < 0) |
| 3411 | return status; |
| 3412 | do_renew_lease(clp, now); |
| 3413 | return 0; |
| 3414 | } |
| 3415 | |
| 3416 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| 3417 | { |
| 3418 | return (server->caps & NFS_CAP_ACLS) |
| 3419 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| 3420 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); |
| 3421 | } |
| 3422 | |
| 3423 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that |
| 3424 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on |
| 3425 | * the stack. |
| 3426 | */ |
| 3427 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) |
| 3428 | |
| 3429 | static int buf_to_pages_noslab(const void *buf, size_t buflen, |
| 3430 | struct page **pages, unsigned int *pgbase) |
| 3431 | { |
| 3432 | struct page *newpage, **spages; |
| 3433 | int rc = 0; |
| 3434 | size_t len; |
| 3435 | spages = pages; |
| 3436 | |
| 3437 | do { |
| 3438 | len = min_t(size_t, PAGE_CACHE_SIZE, buflen); |
| 3439 | newpage = alloc_page(GFP_KERNEL); |
| 3440 | |
| 3441 | if (newpage == NULL) |
| 3442 | goto unwind; |
| 3443 | memcpy(page_address(newpage), buf, len); |
| 3444 | buf += len; |
| 3445 | buflen -= len; |
| 3446 | *pages++ = newpage; |
| 3447 | rc++; |
| 3448 | } while (buflen != 0); |
| 3449 | |
| 3450 | return rc; |
| 3451 | |
| 3452 | unwind: |
| 3453 | for(; rc > 0; rc--) |
| 3454 | __free_page(spages[rc-1]); |
| 3455 | return -ENOMEM; |
| 3456 | } |
| 3457 | |
| 3458 | struct nfs4_cached_acl { |
| 3459 | int cached; |
| 3460 | size_t len; |
| 3461 | char data[0]; |
| 3462 | }; |
| 3463 | |
| 3464 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
| 3465 | { |
| 3466 | struct nfs_inode *nfsi = NFS_I(inode); |
| 3467 | |
| 3468 | spin_lock(&inode->i_lock); |
| 3469 | kfree(nfsi->nfs4_acl); |
| 3470 | nfsi->nfs4_acl = acl; |
| 3471 | spin_unlock(&inode->i_lock); |
| 3472 | } |
| 3473 | |
| 3474 | static void nfs4_zap_acl_attr(struct inode *inode) |
| 3475 | { |
| 3476 | nfs4_set_cached_acl(inode, NULL); |
| 3477 | } |
| 3478 | |
| 3479 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
| 3480 | { |
| 3481 | struct nfs_inode *nfsi = NFS_I(inode); |
| 3482 | struct nfs4_cached_acl *acl; |
| 3483 | int ret = -ENOENT; |
| 3484 | |
| 3485 | spin_lock(&inode->i_lock); |
| 3486 | acl = nfsi->nfs4_acl; |
| 3487 | if (acl == NULL) |
| 3488 | goto out; |
| 3489 | if (buf == NULL) /* user is just asking for length */ |
| 3490 | goto out_len; |
| 3491 | if (acl->cached == 0) |
| 3492 | goto out; |
| 3493 | ret = -ERANGE; /* see getxattr(2) man page */ |
| 3494 | if (acl->len > buflen) |
| 3495 | goto out; |
| 3496 | memcpy(buf, acl->data, acl->len); |
| 3497 | out_len: |
| 3498 | ret = acl->len; |
| 3499 | out: |
| 3500 | spin_unlock(&inode->i_lock); |
| 3501 | return ret; |
| 3502 | } |
| 3503 | |
| 3504 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) |
| 3505 | { |
| 3506 | struct nfs4_cached_acl *acl; |
| 3507 | |
| 3508 | if (buf && acl_len <= PAGE_SIZE) { |
| 3509 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); |
| 3510 | if (acl == NULL) |
| 3511 | goto out; |
| 3512 | acl->cached = 1; |
| 3513 | memcpy(acl->data, buf, acl_len); |
| 3514 | } else { |
| 3515 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
| 3516 | if (acl == NULL) |
| 3517 | goto out; |
| 3518 | acl->cached = 0; |
| 3519 | } |
| 3520 | acl->len = acl_len; |
| 3521 | out: |
| 3522 | nfs4_set_cached_acl(inode, acl); |
| 3523 | } |
| 3524 | |
| 3525 | /* |
| 3526 | * The getxattr API returns the required buffer length when called with a |
| 3527 | * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating |
| 3528 | * the required buf. On a NULL buf, we send a page of data to the server |
| 3529 | * guessing that the ACL request can be serviced by a page. If so, we cache |
| 3530 | * up to the page of ACL data, and the 2nd call to getxattr is serviced by |
| 3531 | * the cache. If not so, we throw away the page, and cache the required |
| 3532 | * length. The next getxattr call will then produce another round trip to |
| 3533 | * the server, this time with the input buf of the required size. |
| 3534 | */ |
| 3535 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| 3536 | { |
| 3537 | struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; |
| 3538 | struct nfs_getaclargs args = { |
| 3539 | .fh = NFS_FH(inode), |
| 3540 | .acl_pages = pages, |
| 3541 | .acl_len = buflen, |
| 3542 | }; |
| 3543 | struct nfs_getaclres res = { |
| 3544 | .acl_len = buflen, |
| 3545 | }; |
| 3546 | void *resp_buf; |
| 3547 | struct rpc_message msg = { |
| 3548 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| 3549 | .rpc_argp = &args, |
| 3550 | .rpc_resp = &res, |
| 3551 | }; |
| 3552 | int ret = -ENOMEM, npages, i, acl_len = 0; |
| 3553 | |
| 3554 | npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 3555 | /* As long as we're doing a round trip to the server anyway, |
| 3556 | * let's be prepared for a page of acl data. */ |
| 3557 | if (npages == 0) |
| 3558 | npages = 1; |
| 3559 | |
| 3560 | for (i = 0; i < npages; i++) { |
| 3561 | pages[i] = alloc_page(GFP_KERNEL); |
| 3562 | if (!pages[i]) |
| 3563 | goto out_free; |
| 3564 | } |
| 3565 | if (npages > 1) { |
| 3566 | /* for decoding across pages */ |
| 3567 | args.acl_scratch = alloc_page(GFP_KERNEL); |
| 3568 | if (!args.acl_scratch) |
| 3569 | goto out_free; |
| 3570 | } |
| 3571 | args.acl_len = npages * PAGE_SIZE; |
| 3572 | args.acl_pgbase = 0; |
| 3573 | /* Let decode_getfacl know not to fail if the ACL data is larger than |
| 3574 | * the page we send as a guess */ |
| 3575 | if (buf == NULL) |
| 3576 | res.acl_flags |= NFS4_ACL_LEN_REQUEST; |
| 3577 | resp_buf = page_address(pages[0]); |
| 3578 | |
| 3579 | dprintk("%s buf %p buflen %ld npages %d args.acl_len %ld\n", |
| 3580 | __func__, buf, buflen, npages, args.acl_len); |
| 3581 | ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), |
| 3582 | &msg, &args.seq_args, &res.seq_res, 0); |
| 3583 | if (ret) |
| 3584 | goto out_free; |
| 3585 | |
| 3586 | acl_len = res.acl_len - res.acl_data_offset; |
| 3587 | if (acl_len > args.acl_len) |
| 3588 | nfs4_write_cached_acl(inode, NULL, acl_len); |
| 3589 | else |
| 3590 | nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset, |
| 3591 | acl_len); |
| 3592 | if (buf) { |
| 3593 | ret = -ERANGE; |
| 3594 | if (acl_len > buflen) |
| 3595 | goto out_free; |
| 3596 | _copy_from_pages(buf, pages, res.acl_data_offset, |
| 3597 | res.acl_len); |
| 3598 | } |
| 3599 | ret = acl_len; |
| 3600 | out_free: |
| 3601 | for (i = 0; i < npages; i++) |
| 3602 | if (pages[i]) |
| 3603 | __free_page(pages[i]); |
| 3604 | if (args.acl_scratch) |
| 3605 | __free_page(args.acl_scratch); |
| 3606 | return ret; |
| 3607 | } |
| 3608 | |
| 3609 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| 3610 | { |
| 3611 | struct nfs4_exception exception = { }; |
| 3612 | ssize_t ret; |
| 3613 | do { |
| 3614 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); |
| 3615 | if (ret >= 0) |
| 3616 | break; |
| 3617 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); |
| 3618 | } while (exception.retry); |
| 3619 | return ret; |
| 3620 | } |
| 3621 | |
| 3622 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
| 3623 | { |
| 3624 | struct nfs_server *server = NFS_SERVER(inode); |
| 3625 | int ret; |
| 3626 | |
| 3627 | if (!nfs4_server_supports_acls(server)) |
| 3628 | return -EOPNOTSUPP; |
| 3629 | ret = nfs_revalidate_inode(server, inode); |
| 3630 | if (ret < 0) |
| 3631 | return ret; |
| 3632 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
| 3633 | nfs_zap_acl_cache(inode); |
| 3634 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
| 3635 | if (ret != -ENOENT) |
| 3636 | /* -ENOENT is returned if there is no ACL or if there is an ACL |
| 3637 | * but no cached acl data, just the acl length */ |
| 3638 | return ret; |
| 3639 | return nfs4_get_acl_uncached(inode, buf, buflen); |
| 3640 | } |
| 3641 | |
| 3642 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| 3643 | { |
| 3644 | struct nfs_server *server = NFS_SERVER(inode); |
| 3645 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 3646 | struct nfs_setaclargs arg = { |
| 3647 | .fh = NFS_FH(inode), |
| 3648 | .acl_pages = pages, |
| 3649 | .acl_len = buflen, |
| 3650 | }; |
| 3651 | struct nfs_setaclres res; |
| 3652 | struct rpc_message msg = { |
| 3653 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| 3654 | .rpc_argp = &arg, |
| 3655 | .rpc_resp = &res, |
| 3656 | }; |
| 3657 | int ret, i; |
| 3658 | |
| 3659 | if (!nfs4_server_supports_acls(server)) |
| 3660 | return -EOPNOTSUPP; |
| 3661 | i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
| 3662 | if (i < 0) |
| 3663 | return i; |
| 3664 | nfs_inode_return_delegation(inode); |
| 3665 | ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| 3666 | |
| 3667 | /* |
| 3668 | * Free each page after tx, so the only ref left is |
| 3669 | * held by the network stack |
| 3670 | */ |
| 3671 | for (; i > 0; i--) |
| 3672 | put_page(pages[i-1]); |
| 3673 | |
| 3674 | /* |
| 3675 | * Acl update can result in inode attribute update. |
| 3676 | * so mark the attribute cache invalid. |
| 3677 | */ |
| 3678 | spin_lock(&inode->i_lock); |
| 3679 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; |
| 3680 | spin_unlock(&inode->i_lock); |
| 3681 | nfs_access_zap_cache(inode); |
| 3682 | nfs_zap_acl_cache(inode); |
| 3683 | return ret; |
| 3684 | } |
| 3685 | |
| 3686 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| 3687 | { |
| 3688 | struct nfs4_exception exception = { }; |
| 3689 | int err; |
| 3690 | do { |
| 3691 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 3692 | __nfs4_proc_set_acl(inode, buf, buflen), |
| 3693 | &exception); |
| 3694 | } while (exception.retry); |
| 3695 | return err; |
| 3696 | } |
| 3697 | |
| 3698 | static int |
| 3699 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
| 3700 | { |
| 3701 | struct nfs_client *clp = server->nfs_client; |
| 3702 | |
| 3703 | if (task->tk_status >= 0) |
| 3704 | return 0; |
| 3705 | switch(task->tk_status) { |
| 3706 | case -NFS4ERR_ADMIN_REVOKED: |
| 3707 | case -NFS4ERR_BAD_STATEID: |
| 3708 | case -NFS4ERR_OPENMODE: |
| 3709 | if (state == NULL) |
| 3710 | break; |
| 3711 | nfs4_schedule_stateid_recovery(server, state); |
| 3712 | goto wait_on_recovery; |
| 3713 | case -NFS4ERR_EXPIRED: |
| 3714 | if (state != NULL) |
| 3715 | nfs4_schedule_stateid_recovery(server, state); |
| 3716 | case -NFS4ERR_STALE_STATEID: |
| 3717 | case -NFS4ERR_STALE_CLIENTID: |
| 3718 | nfs4_schedule_lease_recovery(clp); |
| 3719 | goto wait_on_recovery; |
| 3720 | #if defined(CONFIG_NFS_V4_1) |
| 3721 | case -NFS4ERR_BADSESSION: |
| 3722 | case -NFS4ERR_BADSLOT: |
| 3723 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 3724 | case -NFS4ERR_DEADSESSION: |
| 3725 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 3726 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 3727 | case -NFS4ERR_SEQ_MISORDERED: |
| 3728 | dprintk("%s ERROR %d, Reset session\n", __func__, |
| 3729 | task->tk_status); |
| 3730 | nfs4_schedule_session_recovery(clp->cl_session); |
| 3731 | task->tk_status = 0; |
| 3732 | return -EAGAIN; |
| 3733 | #endif /* CONFIG_NFS_V4_1 */ |
| 3734 | case -NFS4ERR_DELAY: |
| 3735 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
| 3736 | case -NFS4ERR_GRACE: |
| 3737 | case -EKEYEXPIRED: |
| 3738 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 3739 | task->tk_status = 0; |
| 3740 | return -EAGAIN; |
| 3741 | case -NFS4ERR_RETRY_UNCACHED_REP: |
| 3742 | case -NFS4ERR_OLD_STATEID: |
| 3743 | task->tk_status = 0; |
| 3744 | return -EAGAIN; |
| 3745 | } |
| 3746 | task->tk_status = nfs4_map_errors(task->tk_status); |
| 3747 | return 0; |
| 3748 | wait_on_recovery: |
| 3749 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
| 3750 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
| 3751 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
| 3752 | task->tk_status = 0; |
| 3753 | return -EAGAIN; |
| 3754 | } |
| 3755 | |
| 3756 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
| 3757 | unsigned short port, struct rpc_cred *cred, |
| 3758 | struct nfs4_setclientid_res *res) |
| 3759 | { |
| 3760 | nfs4_verifier sc_verifier; |
| 3761 | struct nfs4_setclientid setclientid = { |
| 3762 | .sc_verifier = &sc_verifier, |
| 3763 | .sc_prog = program, |
| 3764 | .sc_cb_ident = clp->cl_cb_ident, |
| 3765 | }; |
| 3766 | struct rpc_message msg = { |
| 3767 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| 3768 | .rpc_argp = &setclientid, |
| 3769 | .rpc_resp = res, |
| 3770 | .rpc_cred = cred, |
| 3771 | }; |
| 3772 | __be32 *p; |
| 3773 | int loop = 0; |
| 3774 | int status; |
| 3775 | |
| 3776 | p = (__be32*)sc_verifier.data; |
| 3777 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| 3778 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| 3779 | |
| 3780 | for(;;) { |
| 3781 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, |
| 3782 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
| 3783 | clp->cl_ipaddr, |
| 3784 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 3785 | RPC_DISPLAY_ADDR), |
| 3786 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 3787 | RPC_DISPLAY_PROTO), |
| 3788 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| 3789 | clp->cl_id_uniquifier); |
| 3790 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, |
| 3791 | sizeof(setclientid.sc_netid), |
| 3792 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 3793 | RPC_DISPLAY_NETID)); |
| 3794 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| 3795 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
| 3796 | clp->cl_ipaddr, port >> 8, port & 255); |
| 3797 | |
| 3798 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| 3799 | if (status != -NFS4ERR_CLID_INUSE) |
| 3800 | break; |
| 3801 | if (loop != 0) { |
| 3802 | ++clp->cl_id_uniquifier; |
| 3803 | break; |
| 3804 | } |
| 3805 | ++loop; |
| 3806 | ssleep(clp->cl_lease_time / HZ + 1); |
| 3807 | } |
| 3808 | return status; |
| 3809 | } |
| 3810 | |
| 3811 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
| 3812 | struct nfs4_setclientid_res *arg, |
| 3813 | struct rpc_cred *cred) |
| 3814 | { |
| 3815 | struct nfs_fsinfo fsinfo; |
| 3816 | struct rpc_message msg = { |
| 3817 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| 3818 | .rpc_argp = arg, |
| 3819 | .rpc_resp = &fsinfo, |
| 3820 | .rpc_cred = cred, |
| 3821 | }; |
| 3822 | unsigned long now; |
| 3823 | int status; |
| 3824 | |
| 3825 | now = jiffies; |
| 3826 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| 3827 | if (status == 0) { |
| 3828 | spin_lock(&clp->cl_lock); |
| 3829 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 3830 | clp->cl_last_renewal = now; |
| 3831 | spin_unlock(&clp->cl_lock); |
| 3832 | } |
| 3833 | return status; |
| 3834 | } |
| 3835 | |
| 3836 | struct nfs4_delegreturndata { |
| 3837 | struct nfs4_delegreturnargs args; |
| 3838 | struct nfs4_delegreturnres res; |
| 3839 | struct nfs_fh fh; |
| 3840 | nfs4_stateid stateid; |
| 3841 | unsigned long timestamp; |
| 3842 | struct nfs_fattr fattr; |
| 3843 | int rpc_status; |
| 3844 | }; |
| 3845 | |
| 3846 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
| 3847 | { |
| 3848 | struct nfs4_delegreturndata *data = calldata; |
| 3849 | |
| 3850 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 3851 | return; |
| 3852 | |
| 3853 | switch (task->tk_status) { |
| 3854 | case -NFS4ERR_STALE_STATEID: |
| 3855 | case -NFS4ERR_EXPIRED: |
| 3856 | case 0: |
| 3857 | renew_lease(data->res.server, data->timestamp); |
| 3858 | break; |
| 3859 | default: |
| 3860 | if (nfs4_async_handle_error(task, data->res.server, NULL) == |
| 3861 | -EAGAIN) { |
| 3862 | rpc_restart_call_prepare(task); |
| 3863 | return; |
| 3864 | } |
| 3865 | } |
| 3866 | data->rpc_status = task->tk_status; |
| 3867 | } |
| 3868 | |
| 3869 | static void nfs4_delegreturn_release(void *calldata) |
| 3870 | { |
| 3871 | kfree(calldata); |
| 3872 | } |
| 3873 | |
| 3874 | #if defined(CONFIG_NFS_V4_1) |
| 3875 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) |
| 3876 | { |
| 3877 | struct nfs4_delegreturndata *d_data; |
| 3878 | |
| 3879 | d_data = (struct nfs4_delegreturndata *)data; |
| 3880 | |
| 3881 | if (nfs4_setup_sequence(d_data->res.server, |
| 3882 | &d_data->args.seq_args, |
| 3883 | &d_data->res.seq_res, 1, task)) |
| 3884 | return; |
| 3885 | rpc_call_start(task); |
| 3886 | } |
| 3887 | #endif /* CONFIG_NFS_V4_1 */ |
| 3888 | |
| 3889 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
| 3890 | #if defined(CONFIG_NFS_V4_1) |
| 3891 | .rpc_call_prepare = nfs4_delegreturn_prepare, |
| 3892 | #endif /* CONFIG_NFS_V4_1 */ |
| 3893 | .rpc_call_done = nfs4_delegreturn_done, |
| 3894 | .rpc_release = nfs4_delegreturn_release, |
| 3895 | }; |
| 3896 | |
| 3897 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| 3898 | { |
| 3899 | struct nfs4_delegreturndata *data; |
| 3900 | struct nfs_server *server = NFS_SERVER(inode); |
| 3901 | struct rpc_task *task; |
| 3902 | struct rpc_message msg = { |
| 3903 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
| 3904 | .rpc_cred = cred, |
| 3905 | }; |
| 3906 | struct rpc_task_setup task_setup_data = { |
| 3907 | .rpc_client = server->client, |
| 3908 | .rpc_message = &msg, |
| 3909 | .callback_ops = &nfs4_delegreturn_ops, |
| 3910 | .flags = RPC_TASK_ASYNC, |
| 3911 | }; |
| 3912 | int status = 0; |
| 3913 | |
| 3914 | data = kzalloc(sizeof(*data), GFP_NOFS); |
| 3915 | if (data == NULL) |
| 3916 | return -ENOMEM; |
| 3917 | data->args.fhandle = &data->fh; |
| 3918 | data->args.stateid = &data->stateid; |
| 3919 | data->args.bitmask = server->attr_bitmask; |
| 3920 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
| 3921 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); |
| 3922 | data->res.fattr = &data->fattr; |
| 3923 | data->res.server = server; |
| 3924 | nfs_fattr_init(data->res.fattr); |
| 3925 | data->timestamp = jiffies; |
| 3926 | data->rpc_status = 0; |
| 3927 | |
| 3928 | task_setup_data.callback_data = data; |
| 3929 | msg.rpc_argp = &data->args; |
| 3930 | msg.rpc_resp = &data->res; |
| 3931 | task = rpc_run_task(&task_setup_data); |
| 3932 | if (IS_ERR(task)) |
| 3933 | return PTR_ERR(task); |
| 3934 | if (!issync) |
| 3935 | goto out; |
| 3936 | status = nfs4_wait_for_completion_rpc_task(task); |
| 3937 | if (status != 0) |
| 3938 | goto out; |
| 3939 | status = data->rpc_status; |
| 3940 | if (status != 0) |
| 3941 | goto out; |
| 3942 | nfs_refresh_inode(inode, &data->fattr); |
| 3943 | out: |
| 3944 | rpc_put_task(task); |
| 3945 | return status; |
| 3946 | } |
| 3947 | |
| 3948 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| 3949 | { |
| 3950 | struct nfs_server *server = NFS_SERVER(inode); |
| 3951 | struct nfs4_exception exception = { }; |
| 3952 | int err; |
| 3953 | do { |
| 3954 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
| 3955 | switch (err) { |
| 3956 | case -NFS4ERR_STALE_STATEID: |
| 3957 | case -NFS4ERR_EXPIRED: |
| 3958 | case 0: |
| 3959 | return 0; |
| 3960 | } |
| 3961 | err = nfs4_handle_exception(server, err, &exception); |
| 3962 | } while (exception.retry); |
| 3963 | return err; |
| 3964 | } |
| 3965 | |
| 3966 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
| 3967 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
| 3968 | |
| 3969 | /* |
| 3970 | * sleep, with exponential backoff, and retry the LOCK operation. |
| 3971 | */ |
| 3972 | static unsigned long |
| 3973 | nfs4_set_lock_task_retry(unsigned long timeout) |
| 3974 | { |
| 3975 | schedule_timeout_killable(timeout); |
| 3976 | timeout <<= 1; |
| 3977 | if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| 3978 | return NFS4_LOCK_MAXTIMEOUT; |
| 3979 | return timeout; |
| 3980 | } |
| 3981 | |
| 3982 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3983 | { |
| 3984 | struct inode *inode = state->inode; |
| 3985 | struct nfs_server *server = NFS_SERVER(inode); |
| 3986 | struct nfs_client *clp = server->nfs_client; |
| 3987 | struct nfs_lockt_args arg = { |
| 3988 | .fh = NFS_FH(inode), |
| 3989 | .fl = request, |
| 3990 | }; |
| 3991 | struct nfs_lockt_res res = { |
| 3992 | .denied = request, |
| 3993 | }; |
| 3994 | struct rpc_message msg = { |
| 3995 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| 3996 | .rpc_argp = &arg, |
| 3997 | .rpc_resp = &res, |
| 3998 | .rpc_cred = state->owner->so_cred, |
| 3999 | }; |
| 4000 | struct nfs4_lock_state *lsp; |
| 4001 | int status; |
| 4002 | |
| 4003 | arg.lock_owner.clientid = clp->cl_clientid; |
| 4004 | status = nfs4_set_lock_state(state, request); |
| 4005 | if (status != 0) |
| 4006 | goto out; |
| 4007 | lsp = request->fl_u.nfs4_fl.owner; |
| 4008 | arg.lock_owner.id = lsp->ls_id.id; |
| 4009 | arg.lock_owner.s_dev = server->s_dev; |
| 4010 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| 4011 | switch (status) { |
| 4012 | case 0: |
| 4013 | request->fl_type = F_UNLCK; |
| 4014 | break; |
| 4015 | case -NFS4ERR_DENIED: |
| 4016 | status = 0; |
| 4017 | } |
| 4018 | request->fl_ops->fl_release_private(request); |
| 4019 | out: |
| 4020 | return status; |
| 4021 | } |
| 4022 | |
| 4023 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 4024 | { |
| 4025 | struct nfs4_exception exception = { }; |
| 4026 | int err; |
| 4027 | |
| 4028 | do { |
| 4029 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 4030 | _nfs4_proc_getlk(state, cmd, request), |
| 4031 | &exception); |
| 4032 | } while (exception.retry); |
| 4033 | return err; |
| 4034 | } |
| 4035 | |
| 4036 | static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| 4037 | { |
| 4038 | int res = 0; |
| 4039 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| 4040 | case FL_POSIX: |
| 4041 | res = posix_lock_file_wait(file, fl); |
| 4042 | break; |
| 4043 | case FL_FLOCK: |
| 4044 | res = flock_lock_file_wait(file, fl); |
| 4045 | break; |
| 4046 | default: |
| 4047 | BUG(); |
| 4048 | } |
| 4049 | return res; |
| 4050 | } |
| 4051 | |
| 4052 | struct nfs4_unlockdata { |
| 4053 | struct nfs_locku_args arg; |
| 4054 | struct nfs_locku_res res; |
| 4055 | struct nfs4_lock_state *lsp; |
| 4056 | struct nfs_open_context *ctx; |
| 4057 | struct file_lock fl; |
| 4058 | const struct nfs_server *server; |
| 4059 | unsigned long timestamp; |
| 4060 | }; |
| 4061 | |
| 4062 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
| 4063 | struct nfs_open_context *ctx, |
| 4064 | struct nfs4_lock_state *lsp, |
| 4065 | struct nfs_seqid *seqid) |
| 4066 | { |
| 4067 | struct nfs4_unlockdata *p; |
| 4068 | struct inode *inode = lsp->ls_state->inode; |
| 4069 | |
| 4070 | p = kzalloc(sizeof(*p), GFP_NOFS); |
| 4071 | if (p == NULL) |
| 4072 | return NULL; |
| 4073 | p->arg.fh = NFS_FH(inode); |
| 4074 | p->arg.fl = &p->fl; |
| 4075 | p->arg.seqid = seqid; |
| 4076 | p->res.seqid = seqid; |
| 4077 | p->arg.stateid = &lsp->ls_stateid; |
| 4078 | p->lsp = lsp; |
| 4079 | atomic_inc(&lsp->ls_count); |
| 4080 | /* Ensure we don't close file until we're done freeing locks! */ |
| 4081 | p->ctx = get_nfs_open_context(ctx); |
| 4082 | memcpy(&p->fl, fl, sizeof(p->fl)); |
| 4083 | p->server = NFS_SERVER(inode); |
| 4084 | return p; |
| 4085 | } |
| 4086 | |
| 4087 | static void nfs4_locku_release_calldata(void *data) |
| 4088 | { |
| 4089 | struct nfs4_unlockdata *calldata = data; |
| 4090 | nfs_free_seqid(calldata->arg.seqid); |
| 4091 | nfs4_put_lock_state(calldata->lsp); |
| 4092 | put_nfs_open_context(calldata->ctx); |
| 4093 | kfree(calldata); |
| 4094 | } |
| 4095 | |
| 4096 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
| 4097 | { |
| 4098 | struct nfs4_unlockdata *calldata = data; |
| 4099 | |
| 4100 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| 4101 | return; |
| 4102 | switch (task->tk_status) { |
| 4103 | case 0: |
| 4104 | memcpy(calldata->lsp->ls_stateid.data, |
| 4105 | calldata->res.stateid.data, |
| 4106 | sizeof(calldata->lsp->ls_stateid.data)); |
| 4107 | renew_lease(calldata->server, calldata->timestamp); |
| 4108 | break; |
| 4109 | case -NFS4ERR_BAD_STATEID: |
| 4110 | case -NFS4ERR_OLD_STATEID: |
| 4111 | case -NFS4ERR_STALE_STATEID: |
| 4112 | case -NFS4ERR_EXPIRED: |
| 4113 | break; |
| 4114 | default: |
| 4115 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
| 4116 | rpc_restart_call_prepare(task); |
| 4117 | } |
| 4118 | } |
| 4119 | |
| 4120 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
| 4121 | { |
| 4122 | struct nfs4_unlockdata *calldata = data; |
| 4123 | |
| 4124 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| 4125 | return; |
| 4126 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { |
| 4127 | /* Note: exit _without_ running nfs4_locku_done */ |
| 4128 | task->tk_action = NULL; |
| 4129 | return; |
| 4130 | } |
| 4131 | calldata->timestamp = jiffies; |
| 4132 | if (nfs4_setup_sequence(calldata->server, |
| 4133 | &calldata->arg.seq_args, |
| 4134 | &calldata->res.seq_res, 1, task)) |
| 4135 | return; |
| 4136 | rpc_call_start(task); |
| 4137 | } |
| 4138 | |
| 4139 | static const struct rpc_call_ops nfs4_locku_ops = { |
| 4140 | .rpc_call_prepare = nfs4_locku_prepare, |
| 4141 | .rpc_call_done = nfs4_locku_done, |
| 4142 | .rpc_release = nfs4_locku_release_calldata, |
| 4143 | }; |
| 4144 | |
| 4145 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
| 4146 | struct nfs_open_context *ctx, |
| 4147 | struct nfs4_lock_state *lsp, |
| 4148 | struct nfs_seqid *seqid) |
| 4149 | { |
| 4150 | struct nfs4_unlockdata *data; |
| 4151 | struct rpc_message msg = { |
| 4152 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
| 4153 | .rpc_cred = ctx->cred, |
| 4154 | }; |
| 4155 | struct rpc_task_setup task_setup_data = { |
| 4156 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), |
| 4157 | .rpc_message = &msg, |
| 4158 | .callback_ops = &nfs4_locku_ops, |
| 4159 | .workqueue = nfsiod_workqueue, |
| 4160 | .flags = RPC_TASK_ASYNC, |
| 4161 | }; |
| 4162 | |
| 4163 | /* Ensure this is an unlock - when canceling a lock, the |
| 4164 | * canceled lock is passed in, and it won't be an unlock. |
| 4165 | */ |
| 4166 | fl->fl_type = F_UNLCK; |
| 4167 | |
| 4168 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
| 4169 | if (data == NULL) { |
| 4170 | nfs_free_seqid(seqid); |
| 4171 | return ERR_PTR(-ENOMEM); |
| 4172 | } |
| 4173 | |
| 4174 | msg.rpc_argp = &data->arg; |
| 4175 | msg.rpc_resp = &data->res; |
| 4176 | task_setup_data.callback_data = data; |
| 4177 | return rpc_run_task(&task_setup_data); |
| 4178 | } |
| 4179 | |
| 4180 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 4181 | { |
| 4182 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 4183 | struct nfs_seqid *seqid; |
| 4184 | struct nfs4_lock_state *lsp; |
| 4185 | struct rpc_task *task; |
| 4186 | int status = 0; |
| 4187 | unsigned char fl_flags = request->fl_flags; |
| 4188 | |
| 4189 | status = nfs4_set_lock_state(state, request); |
| 4190 | /* Unlock _before_ we do the RPC call */ |
| 4191 | request->fl_flags |= FL_EXISTS; |
| 4192 | down_read(&nfsi->rwsem); |
| 4193 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { |
| 4194 | up_read(&nfsi->rwsem); |
| 4195 | goto out; |
| 4196 | } |
| 4197 | up_read(&nfsi->rwsem); |
| 4198 | if (status != 0) |
| 4199 | goto out; |
| 4200 | /* Is this a delegated lock? */ |
| 4201 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 4202 | goto out; |
| 4203 | lsp = request->fl_u.nfs4_fl.owner; |
| 4204 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
| 4205 | status = -ENOMEM; |
| 4206 | if (seqid == NULL) |
| 4207 | goto out; |
| 4208 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
| 4209 | status = PTR_ERR(task); |
| 4210 | if (IS_ERR(task)) |
| 4211 | goto out; |
| 4212 | status = nfs4_wait_for_completion_rpc_task(task); |
| 4213 | rpc_put_task(task); |
| 4214 | out: |
| 4215 | request->fl_flags = fl_flags; |
| 4216 | return status; |
| 4217 | } |
| 4218 | |
| 4219 | struct nfs4_lockdata { |
| 4220 | struct nfs_lock_args arg; |
| 4221 | struct nfs_lock_res res; |
| 4222 | struct nfs4_lock_state *lsp; |
| 4223 | struct nfs_open_context *ctx; |
| 4224 | struct file_lock fl; |
| 4225 | unsigned long timestamp; |
| 4226 | int rpc_status; |
| 4227 | int cancelled; |
| 4228 | struct nfs_server *server; |
| 4229 | }; |
| 4230 | |
| 4231 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, |
| 4232 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
| 4233 | gfp_t gfp_mask) |
| 4234 | { |
| 4235 | struct nfs4_lockdata *p; |
| 4236 | struct inode *inode = lsp->ls_state->inode; |
| 4237 | struct nfs_server *server = NFS_SERVER(inode); |
| 4238 | |
| 4239 | p = kzalloc(sizeof(*p), gfp_mask); |
| 4240 | if (p == NULL) |
| 4241 | return NULL; |
| 4242 | |
| 4243 | p->arg.fh = NFS_FH(inode); |
| 4244 | p->arg.fl = &p->fl; |
| 4245 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
| 4246 | if (p->arg.open_seqid == NULL) |
| 4247 | goto out_free; |
| 4248 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); |
| 4249 | if (p->arg.lock_seqid == NULL) |
| 4250 | goto out_free_seqid; |
| 4251 | p->arg.lock_stateid = &lsp->ls_stateid; |
| 4252 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
| 4253 | p->arg.lock_owner.id = lsp->ls_id.id; |
| 4254 | p->arg.lock_owner.s_dev = server->s_dev; |
| 4255 | p->res.lock_seqid = p->arg.lock_seqid; |
| 4256 | p->lsp = lsp; |
| 4257 | p->server = server; |
| 4258 | atomic_inc(&lsp->ls_count); |
| 4259 | p->ctx = get_nfs_open_context(ctx); |
| 4260 | memcpy(&p->fl, fl, sizeof(p->fl)); |
| 4261 | return p; |
| 4262 | out_free_seqid: |
| 4263 | nfs_free_seqid(p->arg.open_seqid); |
| 4264 | out_free: |
| 4265 | kfree(p); |
| 4266 | return NULL; |
| 4267 | } |
| 4268 | |
| 4269 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) |
| 4270 | { |
| 4271 | struct nfs4_lockdata *data = calldata; |
| 4272 | struct nfs4_state *state = data->lsp->ls_state; |
| 4273 | |
| 4274 | dprintk("%s: begin!\n", __func__); |
| 4275 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
| 4276 | return; |
| 4277 | /* Do we need to do an open_to_lock_owner? */ |
| 4278 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { |
| 4279 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
| 4280 | return; |
| 4281 | data->arg.open_stateid = &state->stateid; |
| 4282 | data->arg.new_lock_owner = 1; |
| 4283 | data->res.open_seqid = data->arg.open_seqid; |
| 4284 | } else |
| 4285 | data->arg.new_lock_owner = 0; |
| 4286 | data->timestamp = jiffies; |
| 4287 | if (nfs4_setup_sequence(data->server, |
| 4288 | &data->arg.seq_args, |
| 4289 | &data->res.seq_res, 1, task)) |
| 4290 | return; |
| 4291 | rpc_call_start(task); |
| 4292 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
| 4293 | } |
| 4294 | |
| 4295 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
| 4296 | { |
| 4297 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 4298 | nfs4_lock_prepare(task, calldata); |
| 4299 | } |
| 4300 | |
| 4301 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
| 4302 | { |
| 4303 | struct nfs4_lockdata *data = calldata; |
| 4304 | |
| 4305 | dprintk("%s: begin!\n", __func__); |
| 4306 | |
| 4307 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 4308 | return; |
| 4309 | |
| 4310 | data->rpc_status = task->tk_status; |
| 4311 | if (data->arg.new_lock_owner != 0) { |
| 4312 | if (data->rpc_status == 0) |
| 4313 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); |
| 4314 | else |
| 4315 | goto out; |
| 4316 | } |
| 4317 | if (data->rpc_status == 0) { |
| 4318 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, |
| 4319 | sizeof(data->lsp->ls_stateid.data)); |
| 4320 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; |
| 4321 | renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); |
| 4322 | } |
| 4323 | out: |
| 4324 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
| 4325 | } |
| 4326 | |
| 4327 | static void nfs4_lock_release(void *calldata) |
| 4328 | { |
| 4329 | struct nfs4_lockdata *data = calldata; |
| 4330 | |
| 4331 | dprintk("%s: begin!\n", __func__); |
| 4332 | nfs_free_seqid(data->arg.open_seqid); |
| 4333 | if (data->cancelled != 0) { |
| 4334 | struct rpc_task *task; |
| 4335 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, |
| 4336 | data->arg.lock_seqid); |
| 4337 | if (!IS_ERR(task)) |
| 4338 | rpc_put_task_async(task); |
| 4339 | dprintk("%s: cancelling lock!\n", __func__); |
| 4340 | } else |
| 4341 | nfs_free_seqid(data->arg.lock_seqid); |
| 4342 | nfs4_put_lock_state(data->lsp); |
| 4343 | put_nfs_open_context(data->ctx); |
| 4344 | kfree(data); |
| 4345 | dprintk("%s: done!\n", __func__); |
| 4346 | } |
| 4347 | |
| 4348 | static const struct rpc_call_ops nfs4_lock_ops = { |
| 4349 | .rpc_call_prepare = nfs4_lock_prepare, |
| 4350 | .rpc_call_done = nfs4_lock_done, |
| 4351 | .rpc_release = nfs4_lock_release, |
| 4352 | }; |
| 4353 | |
| 4354 | static const struct rpc_call_ops nfs4_recover_lock_ops = { |
| 4355 | .rpc_call_prepare = nfs4_recover_lock_prepare, |
| 4356 | .rpc_call_done = nfs4_lock_done, |
| 4357 | .rpc_release = nfs4_lock_release, |
| 4358 | }; |
| 4359 | |
| 4360 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
| 4361 | { |
| 4362 | switch (error) { |
| 4363 | case -NFS4ERR_ADMIN_REVOKED: |
| 4364 | case -NFS4ERR_BAD_STATEID: |
| 4365 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| 4366 | if (new_lock_owner != 0 || |
| 4367 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 4368 | nfs4_schedule_stateid_recovery(server, lsp->ls_state); |
| 4369 | break; |
| 4370 | case -NFS4ERR_STALE_STATEID: |
| 4371 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| 4372 | case -NFS4ERR_EXPIRED: |
| 4373 | nfs4_schedule_lease_recovery(server->nfs_client); |
| 4374 | }; |
| 4375 | } |
| 4376 | |
| 4377 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
| 4378 | { |
| 4379 | struct nfs4_lockdata *data; |
| 4380 | struct rpc_task *task; |
| 4381 | struct rpc_message msg = { |
| 4382 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| 4383 | .rpc_cred = state->owner->so_cred, |
| 4384 | }; |
| 4385 | struct rpc_task_setup task_setup_data = { |
| 4386 | .rpc_client = NFS_CLIENT(state->inode), |
| 4387 | .rpc_message = &msg, |
| 4388 | .callback_ops = &nfs4_lock_ops, |
| 4389 | .workqueue = nfsiod_workqueue, |
| 4390 | .flags = RPC_TASK_ASYNC, |
| 4391 | }; |
| 4392 | int ret; |
| 4393 | |
| 4394 | dprintk("%s: begin!\n", __func__); |
| 4395 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
| 4396 | fl->fl_u.nfs4_fl.owner, |
| 4397 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); |
| 4398 | if (data == NULL) |
| 4399 | return -ENOMEM; |
| 4400 | if (IS_SETLKW(cmd)) |
| 4401 | data->arg.block = 1; |
| 4402 | if (recovery_type > NFS_LOCK_NEW) { |
| 4403 | if (recovery_type == NFS_LOCK_RECLAIM) |
| 4404 | data->arg.reclaim = NFS_LOCK_RECLAIM; |
| 4405 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
| 4406 | } |
| 4407 | msg.rpc_argp = &data->arg; |
| 4408 | msg.rpc_resp = &data->res; |
| 4409 | task_setup_data.callback_data = data; |
| 4410 | task = rpc_run_task(&task_setup_data); |
| 4411 | if (IS_ERR(task)) |
| 4412 | return PTR_ERR(task); |
| 4413 | ret = nfs4_wait_for_completion_rpc_task(task); |
| 4414 | if (ret == 0) { |
| 4415 | ret = data->rpc_status; |
| 4416 | if (ret) |
| 4417 | nfs4_handle_setlk_error(data->server, data->lsp, |
| 4418 | data->arg.new_lock_owner, ret); |
| 4419 | } else |
| 4420 | data->cancelled = 1; |
| 4421 | rpc_put_task(task); |
| 4422 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
| 4423 | return ret; |
| 4424 | } |
| 4425 | |
| 4426 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
| 4427 | { |
| 4428 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4429 | struct nfs4_exception exception = { }; |
| 4430 | int err; |
| 4431 | |
| 4432 | do { |
| 4433 | /* Cache the lock if possible... */ |
| 4434 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| 4435 | return 0; |
| 4436 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
| 4437 | if (err != -NFS4ERR_DELAY) |
| 4438 | break; |
| 4439 | nfs4_handle_exception(server, err, &exception); |
| 4440 | } while (exception.retry); |
| 4441 | return err; |
| 4442 | } |
| 4443 | |
| 4444 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| 4445 | { |
| 4446 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4447 | struct nfs4_exception exception = { }; |
| 4448 | int err; |
| 4449 | |
| 4450 | err = nfs4_set_lock_state(state, request); |
| 4451 | if (err != 0) |
| 4452 | return err; |
| 4453 | do { |
| 4454 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| 4455 | return 0; |
| 4456 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
| 4457 | switch (err) { |
| 4458 | default: |
| 4459 | goto out; |
| 4460 | case -NFS4ERR_GRACE: |
| 4461 | case -NFS4ERR_DELAY: |
| 4462 | nfs4_handle_exception(server, err, &exception); |
| 4463 | err = 0; |
| 4464 | } |
| 4465 | } while (exception.retry); |
| 4466 | out: |
| 4467 | return err; |
| 4468 | } |
| 4469 | |
| 4470 | #if defined(CONFIG_NFS_V4_1) |
| 4471 | static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| 4472 | { |
| 4473 | int status; |
| 4474 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4475 | |
| 4476 | status = nfs41_test_stateid(server, state); |
| 4477 | if (status == NFS_OK) |
| 4478 | return 0; |
| 4479 | nfs41_free_stateid(server, state); |
| 4480 | return nfs4_lock_expired(state, request); |
| 4481 | } |
| 4482 | #endif |
| 4483 | |
| 4484 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 4485 | { |
| 4486 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 4487 | unsigned char fl_flags = request->fl_flags; |
| 4488 | int status = -ENOLCK; |
| 4489 | |
| 4490 | if ((fl_flags & FL_POSIX) && |
| 4491 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) |
| 4492 | goto out; |
| 4493 | /* Is this a delegated open? */ |
| 4494 | status = nfs4_set_lock_state(state, request); |
| 4495 | if (status != 0) |
| 4496 | goto out; |
| 4497 | request->fl_flags |= FL_ACCESS; |
| 4498 | status = do_vfs_lock(request->fl_file, request); |
| 4499 | if (status < 0) |
| 4500 | goto out; |
| 4501 | down_read(&nfsi->rwsem); |
| 4502 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| 4503 | /* Yes: cache locks! */ |
| 4504 | /* ...but avoid races with delegation recall... */ |
| 4505 | request->fl_flags = fl_flags & ~FL_SLEEP; |
| 4506 | status = do_vfs_lock(request->fl_file, request); |
| 4507 | goto out_unlock; |
| 4508 | } |
| 4509 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
| 4510 | if (status != 0) |
| 4511 | goto out_unlock; |
| 4512 | /* Note: we always want to sleep here! */ |
| 4513 | request->fl_flags = fl_flags | FL_SLEEP; |
| 4514 | if (do_vfs_lock(request->fl_file, request) < 0) |
| 4515 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
| 4516 | out_unlock: |
| 4517 | up_read(&nfsi->rwsem); |
| 4518 | out: |
| 4519 | request->fl_flags = fl_flags; |
| 4520 | return status; |
| 4521 | } |
| 4522 | |
| 4523 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 4524 | { |
| 4525 | struct nfs4_exception exception = { }; |
| 4526 | int err; |
| 4527 | |
| 4528 | do { |
| 4529 | err = _nfs4_proc_setlk(state, cmd, request); |
| 4530 | if (err == -NFS4ERR_DENIED) |
| 4531 | err = -EAGAIN; |
| 4532 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 4533 | err, &exception); |
| 4534 | } while (exception.retry); |
| 4535 | return err; |
| 4536 | } |
| 4537 | |
| 4538 | static int |
| 4539 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
| 4540 | { |
| 4541 | struct nfs_open_context *ctx; |
| 4542 | struct nfs4_state *state; |
| 4543 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
| 4544 | int status; |
| 4545 | |
| 4546 | /* verify open state */ |
| 4547 | ctx = nfs_file_open_context(filp); |
| 4548 | state = ctx->state; |
| 4549 | |
| 4550 | if (request->fl_start < 0 || request->fl_end < 0) |
| 4551 | return -EINVAL; |
| 4552 | |
| 4553 | if (IS_GETLK(cmd)) { |
| 4554 | if (state != NULL) |
| 4555 | return nfs4_proc_getlk(state, F_GETLK, request); |
| 4556 | return 0; |
| 4557 | } |
| 4558 | |
| 4559 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| 4560 | return -EINVAL; |
| 4561 | |
| 4562 | if (request->fl_type == F_UNLCK) { |
| 4563 | if (state != NULL) |
| 4564 | return nfs4_proc_unlck(state, cmd, request); |
| 4565 | return 0; |
| 4566 | } |
| 4567 | |
| 4568 | if (state == NULL) |
| 4569 | return -ENOLCK; |
| 4570 | do { |
| 4571 | status = nfs4_proc_setlk(state, cmd, request); |
| 4572 | if ((status != -EAGAIN) || IS_SETLK(cmd)) |
| 4573 | break; |
| 4574 | timeout = nfs4_set_lock_task_retry(timeout); |
| 4575 | status = -ERESTARTSYS; |
| 4576 | if (signalled()) |
| 4577 | break; |
| 4578 | } while(status < 0); |
| 4579 | return status; |
| 4580 | } |
| 4581 | |
| 4582 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
| 4583 | { |
| 4584 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 4585 | struct nfs4_exception exception = { }; |
| 4586 | int err; |
| 4587 | |
| 4588 | err = nfs4_set_lock_state(state, fl); |
| 4589 | if (err != 0) |
| 4590 | goto out; |
| 4591 | do { |
| 4592 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
| 4593 | switch (err) { |
| 4594 | default: |
| 4595 | printk(KERN_ERR "%s: unhandled error %d.\n", |
| 4596 | __func__, err); |
| 4597 | case 0: |
| 4598 | case -ESTALE: |
| 4599 | goto out; |
| 4600 | case -NFS4ERR_EXPIRED: |
| 4601 | nfs4_schedule_stateid_recovery(server, state); |
| 4602 | case -NFS4ERR_STALE_CLIENTID: |
| 4603 | case -NFS4ERR_STALE_STATEID: |
| 4604 | nfs4_schedule_lease_recovery(server->nfs_client); |
| 4605 | goto out; |
| 4606 | case -NFS4ERR_BADSESSION: |
| 4607 | case -NFS4ERR_BADSLOT: |
| 4608 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 4609 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 4610 | case -NFS4ERR_DEADSESSION: |
| 4611 | nfs4_schedule_session_recovery(server->nfs_client->cl_session); |
| 4612 | goto out; |
| 4613 | case -ERESTARTSYS: |
| 4614 | /* |
| 4615 | * The show must go on: exit, but mark the |
| 4616 | * stateid as needing recovery. |
| 4617 | */ |
| 4618 | case -NFS4ERR_ADMIN_REVOKED: |
| 4619 | case -NFS4ERR_BAD_STATEID: |
| 4620 | case -NFS4ERR_OPENMODE: |
| 4621 | nfs4_schedule_stateid_recovery(server, state); |
| 4622 | err = 0; |
| 4623 | goto out; |
| 4624 | case -EKEYEXPIRED: |
| 4625 | /* |
| 4626 | * User RPCSEC_GSS context has expired. |
| 4627 | * We cannot recover this stateid now, so |
| 4628 | * skip it and allow recovery thread to |
| 4629 | * proceed. |
| 4630 | */ |
| 4631 | err = 0; |
| 4632 | goto out; |
| 4633 | case -ENOMEM: |
| 4634 | case -NFS4ERR_DENIED: |
| 4635 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
| 4636 | err = 0; |
| 4637 | goto out; |
| 4638 | case -NFS4ERR_DELAY: |
| 4639 | break; |
| 4640 | } |
| 4641 | err = nfs4_handle_exception(server, err, &exception); |
| 4642 | } while (exception.retry); |
| 4643 | out: |
| 4644 | return err; |
| 4645 | } |
| 4646 | |
| 4647 | static void nfs4_release_lockowner_release(void *calldata) |
| 4648 | { |
| 4649 | kfree(calldata); |
| 4650 | } |
| 4651 | |
| 4652 | const struct rpc_call_ops nfs4_release_lockowner_ops = { |
| 4653 | .rpc_release = nfs4_release_lockowner_release, |
| 4654 | }; |
| 4655 | |
| 4656 | void nfs4_release_lockowner(const struct nfs4_lock_state *lsp) |
| 4657 | { |
| 4658 | struct nfs_server *server = lsp->ls_state->owner->so_server; |
| 4659 | struct nfs_release_lockowner_args *args; |
| 4660 | struct rpc_message msg = { |
| 4661 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], |
| 4662 | }; |
| 4663 | |
| 4664 | if (server->nfs_client->cl_mvops->minor_version != 0) |
| 4665 | return; |
| 4666 | args = kmalloc(sizeof(*args), GFP_NOFS); |
| 4667 | if (!args) |
| 4668 | return; |
| 4669 | args->lock_owner.clientid = server->nfs_client->cl_clientid; |
| 4670 | args->lock_owner.id = lsp->ls_id.id; |
| 4671 | args->lock_owner.s_dev = server->s_dev; |
| 4672 | msg.rpc_argp = args; |
| 4673 | rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args); |
| 4674 | } |
| 4675 | |
| 4676 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| 4677 | |
| 4678 | static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, |
| 4679 | const void *buf, size_t buflen, |
| 4680 | int flags, int type) |
| 4681 | { |
| 4682 | if (strcmp(key, "") != 0) |
| 4683 | return -EINVAL; |
| 4684 | |
| 4685 | return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); |
| 4686 | } |
| 4687 | |
| 4688 | static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, |
| 4689 | void *buf, size_t buflen, int type) |
| 4690 | { |
| 4691 | if (strcmp(key, "") != 0) |
| 4692 | return -EINVAL; |
| 4693 | |
| 4694 | return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); |
| 4695 | } |
| 4696 | |
| 4697 | static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, |
| 4698 | size_t list_len, const char *name, |
| 4699 | size_t name_len, int type) |
| 4700 | { |
| 4701 | size_t len = sizeof(XATTR_NAME_NFSV4_ACL); |
| 4702 | |
| 4703 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
| 4704 | return 0; |
| 4705 | |
| 4706 | if (list && len <= list_len) |
| 4707 | memcpy(list, XATTR_NAME_NFSV4_ACL, len); |
| 4708 | return len; |
| 4709 | } |
| 4710 | |
| 4711 | /* |
| 4712 | * nfs_fhget will use either the mounted_on_fileid or the fileid |
| 4713 | */ |
| 4714 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
| 4715 | { |
| 4716 | if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || |
| 4717 | (fattr->valid & NFS_ATTR_FATTR_FILEID)) && |
| 4718 | (fattr->valid & NFS_ATTR_FATTR_FSID) && |
| 4719 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) |
| 4720 | return; |
| 4721 | |
| 4722 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| 4723 | NFS_ATTR_FATTR_NLINK; |
| 4724 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| 4725 | fattr->nlink = 2; |
| 4726 | } |
| 4727 | |
| 4728 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
| 4729 | struct nfs4_fs_locations *fs_locations, struct page *page) |
| 4730 | { |
| 4731 | struct nfs_server *server = NFS_SERVER(dir); |
| 4732 | u32 bitmask[2] = { |
| 4733 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| 4734 | }; |
| 4735 | struct nfs4_fs_locations_arg args = { |
| 4736 | .dir_fh = NFS_FH(dir), |
| 4737 | .name = name, |
| 4738 | .page = page, |
| 4739 | .bitmask = bitmask, |
| 4740 | }; |
| 4741 | struct nfs4_fs_locations_res res = { |
| 4742 | .fs_locations = fs_locations, |
| 4743 | }; |
| 4744 | struct rpc_message msg = { |
| 4745 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| 4746 | .rpc_argp = &args, |
| 4747 | .rpc_resp = &res, |
| 4748 | }; |
| 4749 | int status; |
| 4750 | |
| 4751 | dprintk("%s: start\n", __func__); |
| 4752 | |
| 4753 | /* Ask for the fileid of the absent filesystem if mounted_on_fileid |
| 4754 | * is not supported */ |
| 4755 | if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) |
| 4756 | bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; |
| 4757 | else |
| 4758 | bitmask[0] |= FATTR4_WORD0_FILEID; |
| 4759 | |
| 4760 | nfs_fattr_init(&fs_locations->fattr); |
| 4761 | fs_locations->server = server; |
| 4762 | fs_locations->nlocations = 0; |
| 4763 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 4764 | dprintk("%s: returned status = %d\n", __func__, status); |
| 4765 | return status; |
| 4766 | } |
| 4767 | |
| 4768 | static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors) |
| 4769 | { |
| 4770 | int status; |
| 4771 | struct nfs4_secinfo_arg args = { |
| 4772 | .dir_fh = NFS_FH(dir), |
| 4773 | .name = name, |
| 4774 | }; |
| 4775 | struct nfs4_secinfo_res res = { |
| 4776 | .flavors = flavors, |
| 4777 | }; |
| 4778 | struct rpc_message msg = { |
| 4779 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], |
| 4780 | .rpc_argp = &args, |
| 4781 | .rpc_resp = &res, |
| 4782 | }; |
| 4783 | |
| 4784 | dprintk("NFS call secinfo %s\n", name->name); |
| 4785 | status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); |
| 4786 | dprintk("NFS reply secinfo: %d\n", status); |
| 4787 | return status; |
| 4788 | } |
| 4789 | |
| 4790 | int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors) |
| 4791 | { |
| 4792 | struct nfs4_exception exception = { }; |
| 4793 | int err; |
| 4794 | do { |
| 4795 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 4796 | _nfs4_proc_secinfo(dir, name, flavors), |
| 4797 | &exception); |
| 4798 | } while (exception.retry); |
| 4799 | return err; |
| 4800 | } |
| 4801 | |
| 4802 | #ifdef CONFIG_NFS_V4_1 |
| 4803 | /* |
| 4804 | * Check the exchange flags returned by the server for invalid flags, having |
| 4805 | * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or |
| 4806 | * DS flags set. |
| 4807 | */ |
| 4808 | static int nfs4_check_cl_exchange_flags(u32 flags) |
| 4809 | { |
| 4810 | if (flags & ~EXCHGID4_FLAG_MASK_R) |
| 4811 | goto out_inval; |
| 4812 | if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && |
| 4813 | (flags & EXCHGID4_FLAG_USE_NON_PNFS)) |
| 4814 | goto out_inval; |
| 4815 | if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) |
| 4816 | goto out_inval; |
| 4817 | return NFS_OK; |
| 4818 | out_inval: |
| 4819 | return -NFS4ERR_INVAL; |
| 4820 | } |
| 4821 | |
| 4822 | static bool |
| 4823 | nfs41_same_server_scope(struct server_scope *a, struct server_scope *b) |
| 4824 | { |
| 4825 | if (a->server_scope_sz == b->server_scope_sz && |
| 4826 | memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) |
| 4827 | return true; |
| 4828 | |
| 4829 | return false; |
| 4830 | } |
| 4831 | |
| 4832 | /* |
| 4833 | * nfs4_proc_exchange_id() |
| 4834 | * |
| 4835 | * Since the clientid has expired, all compounds using sessions |
| 4836 | * associated with the stale clientid will be returning |
| 4837 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore |
| 4838 | * be in some phase of session reset. |
| 4839 | */ |
| 4840 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
| 4841 | { |
| 4842 | nfs4_verifier verifier; |
| 4843 | struct nfs41_exchange_id_args args = { |
| 4844 | .client = clp, |
| 4845 | .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER, |
| 4846 | }; |
| 4847 | struct nfs41_exchange_id_res res = { |
| 4848 | .client = clp, |
| 4849 | }; |
| 4850 | int status; |
| 4851 | struct rpc_message msg = { |
| 4852 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], |
| 4853 | .rpc_argp = &args, |
| 4854 | .rpc_resp = &res, |
| 4855 | .rpc_cred = cred, |
| 4856 | }; |
| 4857 | __be32 *p; |
| 4858 | |
| 4859 | dprintk("--> %s\n", __func__); |
| 4860 | BUG_ON(clp == NULL); |
| 4861 | |
| 4862 | p = (u32 *)verifier.data; |
| 4863 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| 4864 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| 4865 | args.verifier = &verifier; |
| 4866 | |
| 4867 | args.id_len = scnprintf(args.id, sizeof(args.id), |
| 4868 | "%s/%s.%s/%u", |
| 4869 | clp->cl_ipaddr, |
| 4870 | init_utsname()->nodename, |
| 4871 | init_utsname()->domainname, |
| 4872 | clp->cl_rpcclient->cl_auth->au_flavor); |
| 4873 | |
| 4874 | res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL); |
| 4875 | if (unlikely(!res.server_scope)) |
| 4876 | return -ENOMEM; |
| 4877 | |
| 4878 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| 4879 | if (!status) |
| 4880 | status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags); |
| 4881 | |
| 4882 | if (!status) { |
| 4883 | if (clp->server_scope && |
| 4884 | !nfs41_same_server_scope(clp->server_scope, |
| 4885 | res.server_scope)) { |
| 4886 | dprintk("%s: server_scope mismatch detected\n", |
| 4887 | __func__); |
| 4888 | set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); |
| 4889 | kfree(clp->server_scope); |
| 4890 | clp->server_scope = NULL; |
| 4891 | } |
| 4892 | |
| 4893 | if (!clp->server_scope) |
| 4894 | clp->server_scope = res.server_scope; |
| 4895 | else |
| 4896 | kfree(res.server_scope); |
| 4897 | } |
| 4898 | |
| 4899 | dprintk("<-- %s status= %d\n", __func__, status); |
| 4900 | return status; |
| 4901 | } |
| 4902 | |
| 4903 | struct nfs4_get_lease_time_data { |
| 4904 | struct nfs4_get_lease_time_args *args; |
| 4905 | struct nfs4_get_lease_time_res *res; |
| 4906 | struct nfs_client *clp; |
| 4907 | }; |
| 4908 | |
| 4909 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, |
| 4910 | void *calldata) |
| 4911 | { |
| 4912 | int ret; |
| 4913 | struct nfs4_get_lease_time_data *data = |
| 4914 | (struct nfs4_get_lease_time_data *)calldata; |
| 4915 | |
| 4916 | dprintk("--> %s\n", __func__); |
| 4917 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 4918 | /* just setup sequence, do not trigger session recovery |
| 4919 | since we're invoked within one */ |
| 4920 | ret = nfs41_setup_sequence(data->clp->cl_session, |
| 4921 | &data->args->la_seq_args, |
| 4922 | &data->res->lr_seq_res, 0, task); |
| 4923 | |
| 4924 | BUG_ON(ret == -EAGAIN); |
| 4925 | rpc_call_start(task); |
| 4926 | dprintk("<-- %s\n", __func__); |
| 4927 | } |
| 4928 | |
| 4929 | /* |
| 4930 | * Called from nfs4_state_manager thread for session setup, so don't recover |
| 4931 | * from sequence operation or clientid errors. |
| 4932 | */ |
| 4933 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) |
| 4934 | { |
| 4935 | struct nfs4_get_lease_time_data *data = |
| 4936 | (struct nfs4_get_lease_time_data *)calldata; |
| 4937 | |
| 4938 | dprintk("--> %s\n", __func__); |
| 4939 | if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) |
| 4940 | return; |
| 4941 | switch (task->tk_status) { |
| 4942 | case -NFS4ERR_DELAY: |
| 4943 | case -NFS4ERR_GRACE: |
| 4944 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
| 4945 | rpc_delay(task, NFS4_POLL_RETRY_MIN); |
| 4946 | task->tk_status = 0; |
| 4947 | /* fall through */ |
| 4948 | case -NFS4ERR_RETRY_UNCACHED_REP: |
| 4949 | rpc_restart_call_prepare(task); |
| 4950 | return; |
| 4951 | } |
| 4952 | dprintk("<-- %s\n", __func__); |
| 4953 | } |
| 4954 | |
| 4955 | struct rpc_call_ops nfs4_get_lease_time_ops = { |
| 4956 | .rpc_call_prepare = nfs4_get_lease_time_prepare, |
| 4957 | .rpc_call_done = nfs4_get_lease_time_done, |
| 4958 | }; |
| 4959 | |
| 4960 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) |
| 4961 | { |
| 4962 | struct rpc_task *task; |
| 4963 | struct nfs4_get_lease_time_args args; |
| 4964 | struct nfs4_get_lease_time_res res = { |
| 4965 | .lr_fsinfo = fsinfo, |
| 4966 | }; |
| 4967 | struct nfs4_get_lease_time_data data = { |
| 4968 | .args = &args, |
| 4969 | .res = &res, |
| 4970 | .clp = clp, |
| 4971 | }; |
| 4972 | struct rpc_message msg = { |
| 4973 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], |
| 4974 | .rpc_argp = &args, |
| 4975 | .rpc_resp = &res, |
| 4976 | }; |
| 4977 | struct rpc_task_setup task_setup = { |
| 4978 | .rpc_client = clp->cl_rpcclient, |
| 4979 | .rpc_message = &msg, |
| 4980 | .callback_ops = &nfs4_get_lease_time_ops, |
| 4981 | .callback_data = &data, |
| 4982 | .flags = RPC_TASK_TIMEOUT, |
| 4983 | }; |
| 4984 | int status; |
| 4985 | |
| 4986 | dprintk("--> %s\n", __func__); |
| 4987 | task = rpc_run_task(&task_setup); |
| 4988 | |
| 4989 | if (IS_ERR(task)) |
| 4990 | status = PTR_ERR(task); |
| 4991 | else { |
| 4992 | status = task->tk_status; |
| 4993 | rpc_put_task(task); |
| 4994 | } |
| 4995 | dprintk("<-- %s return %d\n", __func__, status); |
| 4996 | |
| 4997 | return status; |
| 4998 | } |
| 4999 | |
| 5000 | /* |
| 5001 | * Reset a slot table |
| 5002 | */ |
| 5003 | static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
| 5004 | int ivalue) |
| 5005 | { |
| 5006 | struct nfs4_slot *new = NULL; |
| 5007 | int i; |
| 5008 | int ret = 0; |
| 5009 | |
| 5010 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
| 5011 | max_reqs, tbl->max_slots); |
| 5012 | |
| 5013 | /* Does the newly negotiated max_reqs match the existing slot table? */ |
| 5014 | if (max_reqs != tbl->max_slots) { |
| 5015 | ret = -ENOMEM; |
| 5016 | new = kmalloc(max_reqs * sizeof(struct nfs4_slot), |
| 5017 | GFP_NOFS); |
| 5018 | if (!new) |
| 5019 | goto out; |
| 5020 | ret = 0; |
| 5021 | kfree(tbl->slots); |
| 5022 | } |
| 5023 | spin_lock(&tbl->slot_tbl_lock); |
| 5024 | if (new) { |
| 5025 | tbl->slots = new; |
| 5026 | tbl->max_slots = max_reqs; |
| 5027 | } |
| 5028 | for (i = 0; i < tbl->max_slots; ++i) |
| 5029 | tbl->slots[i].seq_nr = ivalue; |
| 5030 | spin_unlock(&tbl->slot_tbl_lock); |
| 5031 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, |
| 5032 | tbl, tbl->slots, tbl->max_slots); |
| 5033 | out: |
| 5034 | dprintk("<-- %s: return %d\n", __func__, ret); |
| 5035 | return ret; |
| 5036 | } |
| 5037 | |
| 5038 | /* Destroy the slot table */ |
| 5039 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) |
| 5040 | { |
| 5041 | if (session->fc_slot_table.slots != NULL) { |
| 5042 | kfree(session->fc_slot_table.slots); |
| 5043 | session->fc_slot_table.slots = NULL; |
| 5044 | } |
| 5045 | if (session->bc_slot_table.slots != NULL) { |
| 5046 | kfree(session->bc_slot_table.slots); |
| 5047 | session->bc_slot_table.slots = NULL; |
| 5048 | } |
| 5049 | return; |
| 5050 | } |
| 5051 | |
| 5052 | /* |
| 5053 | * Initialize slot table |
| 5054 | */ |
| 5055 | static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, |
| 5056 | int max_slots, int ivalue) |
| 5057 | { |
| 5058 | struct nfs4_slot *slot; |
| 5059 | int ret = -ENOMEM; |
| 5060 | |
| 5061 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); |
| 5062 | |
| 5063 | dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); |
| 5064 | |
| 5065 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS); |
| 5066 | if (!slot) |
| 5067 | goto out; |
| 5068 | ret = 0; |
| 5069 | |
| 5070 | spin_lock(&tbl->slot_tbl_lock); |
| 5071 | tbl->max_slots = max_slots; |
| 5072 | tbl->slots = slot; |
| 5073 | tbl->highest_used_slotid = -1; /* no slot is currently used */ |
| 5074 | spin_unlock(&tbl->slot_tbl_lock); |
| 5075 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, |
| 5076 | tbl, tbl->slots, tbl->max_slots); |
| 5077 | out: |
| 5078 | dprintk("<-- %s: return %d\n", __func__, ret); |
| 5079 | return ret; |
| 5080 | } |
| 5081 | |
| 5082 | /* |
| 5083 | * Initialize or reset the forechannel and backchannel tables |
| 5084 | */ |
| 5085 | static int nfs4_setup_session_slot_tables(struct nfs4_session *ses) |
| 5086 | { |
| 5087 | struct nfs4_slot_table *tbl; |
| 5088 | int status; |
| 5089 | |
| 5090 | dprintk("--> %s\n", __func__); |
| 5091 | /* Fore channel */ |
| 5092 | tbl = &ses->fc_slot_table; |
| 5093 | if (tbl->slots == NULL) { |
| 5094 | status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1); |
| 5095 | if (status) /* -ENOMEM */ |
| 5096 | return status; |
| 5097 | } else { |
| 5098 | status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1); |
| 5099 | if (status) |
| 5100 | return status; |
| 5101 | } |
| 5102 | /* Back channel */ |
| 5103 | tbl = &ses->bc_slot_table; |
| 5104 | if (tbl->slots == NULL) { |
| 5105 | status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0); |
| 5106 | if (status) |
| 5107 | /* Fore and back channel share a connection so get |
| 5108 | * both slot tables or neither */ |
| 5109 | nfs4_destroy_slot_tables(ses); |
| 5110 | } else |
| 5111 | status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0); |
| 5112 | return status; |
| 5113 | } |
| 5114 | |
| 5115 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) |
| 5116 | { |
| 5117 | struct nfs4_session *session; |
| 5118 | struct nfs4_slot_table *tbl; |
| 5119 | |
| 5120 | session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
| 5121 | if (!session) |
| 5122 | return NULL; |
| 5123 | |
| 5124 | tbl = &session->fc_slot_table; |
| 5125 | tbl->highest_used_slotid = -1; |
| 5126 | spin_lock_init(&tbl->slot_tbl_lock); |
| 5127 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
| 5128 | init_completion(&tbl->complete); |
| 5129 | |
| 5130 | tbl = &session->bc_slot_table; |
| 5131 | tbl->highest_used_slotid = -1; |
| 5132 | spin_lock_init(&tbl->slot_tbl_lock); |
| 5133 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); |
| 5134 | init_completion(&tbl->complete); |
| 5135 | |
| 5136 | session->session_state = 1<<NFS4_SESSION_INITING; |
| 5137 | |
| 5138 | session->clp = clp; |
| 5139 | return session; |
| 5140 | } |
| 5141 | |
| 5142 | void nfs4_destroy_session(struct nfs4_session *session) |
| 5143 | { |
| 5144 | nfs4_proc_destroy_session(session); |
| 5145 | dprintk("%s Destroy backchannel for xprt %p\n", |
| 5146 | __func__, session->clp->cl_rpcclient->cl_xprt); |
| 5147 | xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, |
| 5148 | NFS41_BC_MIN_CALLBACKS); |
| 5149 | nfs4_destroy_slot_tables(session); |
| 5150 | kfree(session); |
| 5151 | } |
| 5152 | |
| 5153 | /* |
| 5154 | * Initialize the values to be used by the client in CREATE_SESSION |
| 5155 | * If nfs4_init_session set the fore channel request and response sizes, |
| 5156 | * use them. |
| 5157 | * |
| 5158 | * Set the back channel max_resp_sz_cached to zero to force the client to |
| 5159 | * always set csa_cachethis to FALSE because the current implementation |
| 5160 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. |
| 5161 | */ |
| 5162 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) |
| 5163 | { |
| 5164 | struct nfs4_session *session = args->client->cl_session; |
| 5165 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, |
| 5166 | mxresp_sz = session->fc_attrs.max_resp_sz; |
| 5167 | |
| 5168 | if (mxrqst_sz == 0) |
| 5169 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; |
| 5170 | if (mxresp_sz == 0) |
| 5171 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; |
| 5172 | /* Fore channel attributes */ |
| 5173 | args->fc_attrs.max_rqst_sz = mxrqst_sz; |
| 5174 | args->fc_attrs.max_resp_sz = mxresp_sz; |
| 5175 | args->fc_attrs.max_ops = NFS4_MAX_OPS; |
| 5176 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; |
| 5177 | |
| 5178 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " |
| 5179 | "max_ops=%u max_reqs=%u\n", |
| 5180 | __func__, |
| 5181 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, |
| 5182 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
| 5183 | |
| 5184 | /* Back channel attributes */ |
| 5185 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; |
| 5186 | args->bc_attrs.max_resp_sz = PAGE_SIZE; |
| 5187 | args->bc_attrs.max_resp_sz_cached = 0; |
| 5188 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; |
| 5189 | args->bc_attrs.max_reqs = 1; |
| 5190 | |
| 5191 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " |
| 5192 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", |
| 5193 | __func__, |
| 5194 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, |
| 5195 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, |
| 5196 | args->bc_attrs.max_reqs); |
| 5197 | } |
| 5198 | |
| 5199 | static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) |
| 5200 | { |
| 5201 | struct nfs4_channel_attrs *sent = &args->fc_attrs; |
| 5202 | struct nfs4_channel_attrs *rcvd = &session->fc_attrs; |
| 5203 | |
| 5204 | if (rcvd->max_resp_sz > sent->max_resp_sz) |
| 5205 | return -EINVAL; |
| 5206 | /* |
| 5207 | * Our requested max_ops is the minimum we need; we're not |
| 5208 | * prepared to break up compounds into smaller pieces than that. |
| 5209 | * So, no point even trying to continue if the server won't |
| 5210 | * cooperate: |
| 5211 | */ |
| 5212 | if (rcvd->max_ops < sent->max_ops) |
| 5213 | return -EINVAL; |
| 5214 | if (rcvd->max_reqs == 0) |
| 5215 | return -EINVAL; |
| 5216 | return 0; |
| 5217 | } |
| 5218 | |
| 5219 | static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) |
| 5220 | { |
| 5221 | struct nfs4_channel_attrs *sent = &args->bc_attrs; |
| 5222 | struct nfs4_channel_attrs *rcvd = &session->bc_attrs; |
| 5223 | |
| 5224 | if (rcvd->max_rqst_sz > sent->max_rqst_sz) |
| 5225 | return -EINVAL; |
| 5226 | if (rcvd->max_resp_sz < sent->max_resp_sz) |
| 5227 | return -EINVAL; |
| 5228 | if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) |
| 5229 | return -EINVAL; |
| 5230 | /* These would render the backchannel useless: */ |
| 5231 | if (rcvd->max_ops == 0) |
| 5232 | return -EINVAL; |
| 5233 | if (rcvd->max_reqs == 0) |
| 5234 | return -EINVAL; |
| 5235 | return 0; |
| 5236 | } |
| 5237 | |
| 5238 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, |
| 5239 | struct nfs4_session *session) |
| 5240 | { |
| 5241 | int ret; |
| 5242 | |
| 5243 | ret = nfs4_verify_fore_channel_attrs(args, session); |
| 5244 | if (ret) |
| 5245 | return ret; |
| 5246 | return nfs4_verify_back_channel_attrs(args, session); |
| 5247 | } |
| 5248 | |
| 5249 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
| 5250 | { |
| 5251 | struct nfs4_session *session = clp->cl_session; |
| 5252 | struct nfs41_create_session_args args = { |
| 5253 | .client = clp, |
| 5254 | .cb_program = NFS4_CALLBACK, |
| 5255 | }; |
| 5256 | struct nfs41_create_session_res res = { |
| 5257 | .client = clp, |
| 5258 | }; |
| 5259 | struct rpc_message msg = { |
| 5260 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], |
| 5261 | .rpc_argp = &args, |
| 5262 | .rpc_resp = &res, |
| 5263 | }; |
| 5264 | int status; |
| 5265 | |
| 5266 | nfs4_init_channel_attrs(&args); |
| 5267 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
| 5268 | |
| 5269 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| 5270 | |
| 5271 | if (!status) |
| 5272 | /* Verify the session's negotiated channel_attrs values */ |
| 5273 | status = nfs4_verify_channel_attrs(&args, session); |
| 5274 | if (!status) { |
| 5275 | /* Increment the clientid slot sequence id */ |
| 5276 | clp->cl_seqid++; |
| 5277 | } |
| 5278 | |
| 5279 | return status; |
| 5280 | } |
| 5281 | |
| 5282 | /* |
| 5283 | * Issues a CREATE_SESSION operation to the server. |
| 5284 | * It is the responsibility of the caller to verify the session is |
| 5285 | * expired before calling this routine. |
| 5286 | */ |
| 5287 | int nfs4_proc_create_session(struct nfs_client *clp) |
| 5288 | { |
| 5289 | int status; |
| 5290 | unsigned *ptr; |
| 5291 | struct nfs4_session *session = clp->cl_session; |
| 5292 | |
| 5293 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); |
| 5294 | |
| 5295 | status = _nfs4_proc_create_session(clp); |
| 5296 | if (status) |
| 5297 | goto out; |
| 5298 | |
| 5299 | /* Init or reset the session slot tables */ |
| 5300 | status = nfs4_setup_session_slot_tables(session); |
| 5301 | dprintk("slot table setup returned %d\n", status); |
| 5302 | if (status) |
| 5303 | goto out; |
| 5304 | |
| 5305 | ptr = (unsigned *)&session->sess_id.data[0]; |
| 5306 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, |
| 5307 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 5308 | out: |
| 5309 | dprintk("<-- %s\n", __func__); |
| 5310 | return status; |
| 5311 | } |
| 5312 | |
| 5313 | /* |
| 5314 | * Issue the over-the-wire RPC DESTROY_SESSION. |
| 5315 | * The caller must serialize access to this routine. |
| 5316 | */ |
| 5317 | int nfs4_proc_destroy_session(struct nfs4_session *session) |
| 5318 | { |
| 5319 | int status = 0; |
| 5320 | struct rpc_message msg; |
| 5321 | |
| 5322 | dprintk("--> nfs4_proc_destroy_session\n"); |
| 5323 | |
| 5324 | /* session is still being setup */ |
| 5325 | if (session->clp->cl_cons_state != NFS_CS_READY) |
| 5326 | return status; |
| 5327 | |
| 5328 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; |
| 5329 | msg.rpc_argp = session; |
| 5330 | msg.rpc_resp = NULL; |
| 5331 | msg.rpc_cred = NULL; |
| 5332 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| 5333 | |
| 5334 | if (status) |
| 5335 | printk(KERN_WARNING |
| 5336 | "Got error %d from the server on DESTROY_SESSION. " |
| 5337 | "Session has been destroyed regardless...\n", status); |
| 5338 | |
| 5339 | dprintk("<-- nfs4_proc_destroy_session\n"); |
| 5340 | return status; |
| 5341 | } |
| 5342 | |
| 5343 | int nfs4_init_session(struct nfs_server *server) |
| 5344 | { |
| 5345 | struct nfs_client *clp = server->nfs_client; |
| 5346 | struct nfs4_session *session; |
| 5347 | unsigned int rsize, wsize; |
| 5348 | int ret; |
| 5349 | |
| 5350 | if (!nfs4_has_session(clp)) |
| 5351 | return 0; |
| 5352 | |
| 5353 | session = clp->cl_session; |
| 5354 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) |
| 5355 | return 0; |
| 5356 | |
| 5357 | rsize = server->rsize; |
| 5358 | if (rsize == 0) |
| 5359 | rsize = NFS_MAX_FILE_IO_SIZE; |
| 5360 | wsize = server->wsize; |
| 5361 | if (wsize == 0) |
| 5362 | wsize = NFS_MAX_FILE_IO_SIZE; |
| 5363 | |
| 5364 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
| 5365 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; |
| 5366 | |
| 5367 | ret = nfs4_recover_expired_lease(server); |
| 5368 | if (!ret) |
| 5369 | ret = nfs4_check_client_ready(clp); |
| 5370 | return ret; |
| 5371 | } |
| 5372 | |
| 5373 | int nfs4_init_ds_session(struct nfs_client *clp) |
| 5374 | { |
| 5375 | struct nfs4_session *session = clp->cl_session; |
| 5376 | int ret; |
| 5377 | |
| 5378 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) |
| 5379 | return 0; |
| 5380 | |
| 5381 | ret = nfs4_client_recover_expired_lease(clp); |
| 5382 | if (!ret) |
| 5383 | /* Test for the DS role */ |
| 5384 | if (!is_ds_client(clp)) |
| 5385 | ret = -ENODEV; |
| 5386 | if (!ret) |
| 5387 | ret = nfs4_check_client_ready(clp); |
| 5388 | return ret; |
| 5389 | |
| 5390 | } |
| 5391 | EXPORT_SYMBOL_GPL(nfs4_init_ds_session); |
| 5392 | |
| 5393 | |
| 5394 | /* |
| 5395 | * Renew the cl_session lease. |
| 5396 | */ |
| 5397 | struct nfs4_sequence_data { |
| 5398 | struct nfs_client *clp; |
| 5399 | struct nfs4_sequence_args args; |
| 5400 | struct nfs4_sequence_res res; |
| 5401 | }; |
| 5402 | |
| 5403 | static void nfs41_sequence_release(void *data) |
| 5404 | { |
| 5405 | struct nfs4_sequence_data *calldata = data; |
| 5406 | struct nfs_client *clp = calldata->clp; |
| 5407 | |
| 5408 | if (atomic_read(&clp->cl_count) > 1) |
| 5409 | nfs4_schedule_state_renewal(clp); |
| 5410 | nfs_put_client(clp); |
| 5411 | kfree(calldata); |
| 5412 | } |
| 5413 | |
| 5414 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| 5415 | { |
| 5416 | switch(task->tk_status) { |
| 5417 | case -NFS4ERR_DELAY: |
| 5418 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 5419 | return -EAGAIN; |
| 5420 | default: |
| 5421 | nfs4_schedule_lease_recovery(clp); |
| 5422 | } |
| 5423 | return 0; |
| 5424 | } |
| 5425 | |
| 5426 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
| 5427 | { |
| 5428 | struct nfs4_sequence_data *calldata = data; |
| 5429 | struct nfs_client *clp = calldata->clp; |
| 5430 | |
| 5431 | if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
| 5432 | return; |
| 5433 | |
| 5434 | if (task->tk_status < 0) { |
| 5435 | dprintk("%s ERROR %d\n", __func__, task->tk_status); |
| 5436 | if (atomic_read(&clp->cl_count) == 1) |
| 5437 | goto out; |
| 5438 | |
| 5439 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
| 5440 | rpc_restart_call_prepare(task); |
| 5441 | return; |
| 5442 | } |
| 5443 | } |
| 5444 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
| 5445 | out: |
| 5446 | dprintk("<-- %s\n", __func__); |
| 5447 | } |
| 5448 | |
| 5449 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) |
| 5450 | { |
| 5451 | struct nfs4_sequence_data *calldata = data; |
| 5452 | struct nfs_client *clp = calldata->clp; |
| 5453 | struct nfs4_sequence_args *args; |
| 5454 | struct nfs4_sequence_res *res; |
| 5455 | |
| 5456 | args = task->tk_msg.rpc_argp; |
| 5457 | res = task->tk_msg.rpc_resp; |
| 5458 | |
| 5459 | if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task)) |
| 5460 | return; |
| 5461 | rpc_call_start(task); |
| 5462 | } |
| 5463 | |
| 5464 | static const struct rpc_call_ops nfs41_sequence_ops = { |
| 5465 | .rpc_call_done = nfs41_sequence_call_done, |
| 5466 | .rpc_call_prepare = nfs41_sequence_prepare, |
| 5467 | .rpc_release = nfs41_sequence_release, |
| 5468 | }; |
| 5469 | |
| 5470 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| 5471 | { |
| 5472 | struct nfs4_sequence_data *calldata; |
| 5473 | struct rpc_message msg = { |
| 5474 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], |
| 5475 | .rpc_cred = cred, |
| 5476 | }; |
| 5477 | struct rpc_task_setup task_setup_data = { |
| 5478 | .rpc_client = clp->cl_rpcclient, |
| 5479 | .rpc_message = &msg, |
| 5480 | .callback_ops = &nfs41_sequence_ops, |
| 5481 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, |
| 5482 | }; |
| 5483 | |
| 5484 | if (!atomic_inc_not_zero(&clp->cl_count)) |
| 5485 | return ERR_PTR(-EIO); |
| 5486 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| 5487 | if (calldata == NULL) { |
| 5488 | nfs_put_client(clp); |
| 5489 | return ERR_PTR(-ENOMEM); |
| 5490 | } |
| 5491 | msg.rpc_argp = &calldata->args; |
| 5492 | msg.rpc_resp = &calldata->res; |
| 5493 | calldata->clp = clp; |
| 5494 | task_setup_data.callback_data = calldata; |
| 5495 | |
| 5496 | return rpc_run_task(&task_setup_data); |
| 5497 | } |
| 5498 | |
| 5499 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) |
| 5500 | { |
| 5501 | struct rpc_task *task; |
| 5502 | int ret = 0; |
| 5503 | |
| 5504 | if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) |
| 5505 | return 0; |
| 5506 | task = _nfs41_proc_sequence(clp, cred); |
| 5507 | if (IS_ERR(task)) |
| 5508 | ret = PTR_ERR(task); |
| 5509 | else |
| 5510 | rpc_put_task_async(task); |
| 5511 | dprintk("<-- %s status=%d\n", __func__, ret); |
| 5512 | return ret; |
| 5513 | } |
| 5514 | |
| 5515 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| 5516 | { |
| 5517 | struct rpc_task *task; |
| 5518 | int ret; |
| 5519 | |
| 5520 | task = _nfs41_proc_sequence(clp, cred); |
| 5521 | if (IS_ERR(task)) { |
| 5522 | ret = PTR_ERR(task); |
| 5523 | goto out; |
| 5524 | } |
| 5525 | ret = rpc_wait_for_completion_task(task); |
| 5526 | if (!ret) { |
| 5527 | struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; |
| 5528 | |
| 5529 | if (task->tk_status == 0) |
| 5530 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); |
| 5531 | ret = task->tk_status; |
| 5532 | } |
| 5533 | rpc_put_task(task); |
| 5534 | out: |
| 5535 | dprintk("<-- %s status=%d\n", __func__, ret); |
| 5536 | return ret; |
| 5537 | } |
| 5538 | |
| 5539 | struct nfs4_reclaim_complete_data { |
| 5540 | struct nfs_client *clp; |
| 5541 | struct nfs41_reclaim_complete_args arg; |
| 5542 | struct nfs41_reclaim_complete_res res; |
| 5543 | }; |
| 5544 | |
| 5545 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) |
| 5546 | { |
| 5547 | struct nfs4_reclaim_complete_data *calldata = data; |
| 5548 | |
| 5549 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 5550 | if (nfs41_setup_sequence(calldata->clp->cl_session, |
| 5551 | &calldata->arg.seq_args, |
| 5552 | &calldata->res.seq_res, 0, task)) |
| 5553 | return; |
| 5554 | |
| 5555 | rpc_call_start(task); |
| 5556 | } |
| 5557 | |
| 5558 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| 5559 | { |
| 5560 | switch(task->tk_status) { |
| 5561 | case 0: |
| 5562 | case -NFS4ERR_COMPLETE_ALREADY: |
| 5563 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ |
| 5564 | break; |
| 5565 | case -NFS4ERR_DELAY: |
| 5566 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 5567 | /* fall through */ |
| 5568 | case -NFS4ERR_RETRY_UNCACHED_REP: |
| 5569 | return -EAGAIN; |
| 5570 | default: |
| 5571 | nfs4_schedule_lease_recovery(clp); |
| 5572 | } |
| 5573 | return 0; |
| 5574 | } |
| 5575 | |
| 5576 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
| 5577 | { |
| 5578 | struct nfs4_reclaim_complete_data *calldata = data; |
| 5579 | struct nfs_client *clp = calldata->clp; |
| 5580 | struct nfs4_sequence_res *res = &calldata->res.seq_res; |
| 5581 | |
| 5582 | dprintk("--> %s\n", __func__); |
| 5583 | if (!nfs41_sequence_done(task, res)) |
| 5584 | return; |
| 5585 | |
| 5586 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
| 5587 | rpc_restart_call_prepare(task); |
| 5588 | return; |
| 5589 | } |
| 5590 | dprintk("<-- %s\n", __func__); |
| 5591 | } |
| 5592 | |
| 5593 | static void nfs4_free_reclaim_complete_data(void *data) |
| 5594 | { |
| 5595 | struct nfs4_reclaim_complete_data *calldata = data; |
| 5596 | |
| 5597 | kfree(calldata); |
| 5598 | } |
| 5599 | |
| 5600 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { |
| 5601 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, |
| 5602 | .rpc_call_done = nfs4_reclaim_complete_done, |
| 5603 | .rpc_release = nfs4_free_reclaim_complete_data, |
| 5604 | }; |
| 5605 | |
| 5606 | /* |
| 5607 | * Issue a global reclaim complete. |
| 5608 | */ |
| 5609 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) |
| 5610 | { |
| 5611 | struct nfs4_reclaim_complete_data *calldata; |
| 5612 | struct rpc_task *task; |
| 5613 | struct rpc_message msg = { |
| 5614 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], |
| 5615 | }; |
| 5616 | struct rpc_task_setup task_setup_data = { |
| 5617 | .rpc_client = clp->cl_rpcclient, |
| 5618 | .rpc_message = &msg, |
| 5619 | .callback_ops = &nfs4_reclaim_complete_call_ops, |
| 5620 | .flags = RPC_TASK_ASYNC, |
| 5621 | }; |
| 5622 | int status = -ENOMEM; |
| 5623 | |
| 5624 | dprintk("--> %s\n", __func__); |
| 5625 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| 5626 | if (calldata == NULL) |
| 5627 | goto out; |
| 5628 | calldata->clp = clp; |
| 5629 | calldata->arg.one_fs = 0; |
| 5630 | |
| 5631 | msg.rpc_argp = &calldata->arg; |
| 5632 | msg.rpc_resp = &calldata->res; |
| 5633 | task_setup_data.callback_data = calldata; |
| 5634 | task = rpc_run_task(&task_setup_data); |
| 5635 | if (IS_ERR(task)) { |
| 5636 | status = PTR_ERR(task); |
| 5637 | goto out; |
| 5638 | } |
| 5639 | status = nfs4_wait_for_completion_rpc_task(task); |
| 5640 | if (status == 0) |
| 5641 | status = task->tk_status; |
| 5642 | rpc_put_task(task); |
| 5643 | return 0; |
| 5644 | out: |
| 5645 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5646 | return status; |
| 5647 | } |
| 5648 | |
| 5649 | static void |
| 5650 | nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) |
| 5651 | { |
| 5652 | struct nfs4_layoutget *lgp = calldata; |
| 5653 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| 5654 | |
| 5655 | dprintk("--> %s\n", __func__); |
| 5656 | /* Note the is a race here, where a CB_LAYOUTRECALL can come in |
| 5657 | * right now covering the LAYOUTGET we are about to send. |
| 5658 | * However, that is not so catastrophic, and there seems |
| 5659 | * to be no way to prevent it completely. |
| 5660 | */ |
| 5661 | if (nfs4_setup_sequence(server, &lgp->args.seq_args, |
| 5662 | &lgp->res.seq_res, 0, task)) |
| 5663 | return; |
| 5664 | if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, |
| 5665 | NFS_I(lgp->args.inode)->layout, |
| 5666 | lgp->args.ctx->state)) { |
| 5667 | rpc_exit(task, NFS4_OK); |
| 5668 | return; |
| 5669 | } |
| 5670 | rpc_call_start(task); |
| 5671 | } |
| 5672 | |
| 5673 | static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) |
| 5674 | { |
| 5675 | struct nfs4_layoutget *lgp = calldata; |
| 5676 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| 5677 | |
| 5678 | dprintk("--> %s\n", __func__); |
| 5679 | |
| 5680 | if (!nfs4_sequence_done(task, &lgp->res.seq_res)) |
| 5681 | return; |
| 5682 | |
| 5683 | switch (task->tk_status) { |
| 5684 | case 0: |
| 5685 | break; |
| 5686 | case -NFS4ERR_LAYOUTTRYLATER: |
| 5687 | case -NFS4ERR_RECALLCONFLICT: |
| 5688 | task->tk_status = -NFS4ERR_DELAY; |
| 5689 | /* Fall through */ |
| 5690 | default: |
| 5691 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| 5692 | rpc_restart_call_prepare(task); |
| 5693 | return; |
| 5694 | } |
| 5695 | } |
| 5696 | dprintk("<-- %s\n", __func__); |
| 5697 | } |
| 5698 | |
| 5699 | static void nfs4_layoutget_release(void *calldata) |
| 5700 | { |
| 5701 | struct nfs4_layoutget *lgp = calldata; |
| 5702 | |
| 5703 | dprintk("--> %s\n", __func__); |
| 5704 | put_nfs_open_context(lgp->args.ctx); |
| 5705 | kfree(calldata); |
| 5706 | dprintk("<-- %s\n", __func__); |
| 5707 | } |
| 5708 | |
| 5709 | static const struct rpc_call_ops nfs4_layoutget_call_ops = { |
| 5710 | .rpc_call_prepare = nfs4_layoutget_prepare, |
| 5711 | .rpc_call_done = nfs4_layoutget_done, |
| 5712 | .rpc_release = nfs4_layoutget_release, |
| 5713 | }; |
| 5714 | |
| 5715 | int nfs4_proc_layoutget(struct nfs4_layoutget *lgp) |
| 5716 | { |
| 5717 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| 5718 | struct rpc_task *task; |
| 5719 | struct rpc_message msg = { |
| 5720 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], |
| 5721 | .rpc_argp = &lgp->args, |
| 5722 | .rpc_resp = &lgp->res, |
| 5723 | }; |
| 5724 | struct rpc_task_setup task_setup_data = { |
| 5725 | .rpc_client = server->client, |
| 5726 | .rpc_message = &msg, |
| 5727 | .callback_ops = &nfs4_layoutget_call_ops, |
| 5728 | .callback_data = lgp, |
| 5729 | .flags = RPC_TASK_ASYNC, |
| 5730 | }; |
| 5731 | int status = 0; |
| 5732 | |
| 5733 | dprintk("--> %s\n", __func__); |
| 5734 | |
| 5735 | lgp->res.layoutp = &lgp->args.layout; |
| 5736 | lgp->res.seq_res.sr_slot = NULL; |
| 5737 | task = rpc_run_task(&task_setup_data); |
| 5738 | if (IS_ERR(task)) |
| 5739 | return PTR_ERR(task); |
| 5740 | status = nfs4_wait_for_completion_rpc_task(task); |
| 5741 | if (status == 0) |
| 5742 | status = task->tk_status; |
| 5743 | if (status == 0) |
| 5744 | status = pnfs_layout_process(lgp); |
| 5745 | rpc_put_task(task); |
| 5746 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5747 | return status; |
| 5748 | } |
| 5749 | |
| 5750 | static void |
| 5751 | nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) |
| 5752 | { |
| 5753 | struct nfs4_layoutreturn *lrp = calldata; |
| 5754 | |
| 5755 | dprintk("--> %s\n", __func__); |
| 5756 | if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args, |
| 5757 | &lrp->res.seq_res, 0, task)) |
| 5758 | return; |
| 5759 | rpc_call_start(task); |
| 5760 | } |
| 5761 | |
| 5762 | static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) |
| 5763 | { |
| 5764 | struct nfs4_layoutreturn *lrp = calldata; |
| 5765 | struct nfs_server *server; |
| 5766 | struct pnfs_layout_hdr *lo = lrp->args.layout; |
| 5767 | |
| 5768 | dprintk("--> %s\n", __func__); |
| 5769 | |
| 5770 | if (!nfs4_sequence_done(task, &lrp->res.seq_res)) |
| 5771 | return; |
| 5772 | |
| 5773 | server = NFS_SERVER(lrp->args.inode); |
| 5774 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| 5775 | rpc_restart_call_prepare(task); |
| 5776 | return; |
| 5777 | } |
| 5778 | spin_lock(&lo->plh_inode->i_lock); |
| 5779 | if (task->tk_status == 0) { |
| 5780 | if (lrp->res.lrs_present) { |
| 5781 | pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); |
| 5782 | } else |
| 5783 | BUG_ON(!list_empty(&lo->plh_segs)); |
| 5784 | } |
| 5785 | lo->plh_block_lgets--; |
| 5786 | spin_unlock(&lo->plh_inode->i_lock); |
| 5787 | dprintk("<-- %s\n", __func__); |
| 5788 | } |
| 5789 | |
| 5790 | static void nfs4_layoutreturn_release(void *calldata) |
| 5791 | { |
| 5792 | struct nfs4_layoutreturn *lrp = calldata; |
| 5793 | |
| 5794 | dprintk("--> %s\n", __func__); |
| 5795 | put_layout_hdr(lrp->args.layout); |
| 5796 | kfree(calldata); |
| 5797 | dprintk("<-- %s\n", __func__); |
| 5798 | } |
| 5799 | |
| 5800 | static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { |
| 5801 | .rpc_call_prepare = nfs4_layoutreturn_prepare, |
| 5802 | .rpc_call_done = nfs4_layoutreturn_done, |
| 5803 | .rpc_release = nfs4_layoutreturn_release, |
| 5804 | }; |
| 5805 | |
| 5806 | int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) |
| 5807 | { |
| 5808 | struct rpc_task *task; |
| 5809 | struct rpc_message msg = { |
| 5810 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], |
| 5811 | .rpc_argp = &lrp->args, |
| 5812 | .rpc_resp = &lrp->res, |
| 5813 | }; |
| 5814 | struct rpc_task_setup task_setup_data = { |
| 5815 | .rpc_client = lrp->clp->cl_rpcclient, |
| 5816 | .rpc_message = &msg, |
| 5817 | .callback_ops = &nfs4_layoutreturn_call_ops, |
| 5818 | .callback_data = lrp, |
| 5819 | }; |
| 5820 | int status; |
| 5821 | |
| 5822 | dprintk("--> %s\n", __func__); |
| 5823 | task = rpc_run_task(&task_setup_data); |
| 5824 | if (IS_ERR(task)) |
| 5825 | return PTR_ERR(task); |
| 5826 | status = task->tk_status; |
| 5827 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5828 | rpc_put_task(task); |
| 5829 | return status; |
| 5830 | } |
| 5831 | |
| 5832 | /* |
| 5833 | * Retrieve the list of Data Server devices from the MDS. |
| 5834 | */ |
| 5835 | static int _nfs4_getdevicelist(struct nfs_server *server, |
| 5836 | const struct nfs_fh *fh, |
| 5837 | struct pnfs_devicelist *devlist) |
| 5838 | { |
| 5839 | struct nfs4_getdevicelist_args args = { |
| 5840 | .fh = fh, |
| 5841 | .layoutclass = server->pnfs_curr_ld->id, |
| 5842 | }; |
| 5843 | struct nfs4_getdevicelist_res res = { |
| 5844 | .devlist = devlist, |
| 5845 | }; |
| 5846 | struct rpc_message msg = { |
| 5847 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], |
| 5848 | .rpc_argp = &args, |
| 5849 | .rpc_resp = &res, |
| 5850 | }; |
| 5851 | int status; |
| 5852 | |
| 5853 | dprintk("--> %s\n", __func__); |
| 5854 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, |
| 5855 | &res.seq_res, 0); |
| 5856 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5857 | return status; |
| 5858 | } |
| 5859 | |
| 5860 | int nfs4_proc_getdevicelist(struct nfs_server *server, |
| 5861 | const struct nfs_fh *fh, |
| 5862 | struct pnfs_devicelist *devlist) |
| 5863 | { |
| 5864 | struct nfs4_exception exception = { }; |
| 5865 | int err; |
| 5866 | |
| 5867 | do { |
| 5868 | err = nfs4_handle_exception(server, |
| 5869 | _nfs4_getdevicelist(server, fh, devlist), |
| 5870 | &exception); |
| 5871 | } while (exception.retry); |
| 5872 | |
| 5873 | dprintk("%s: err=%d, num_devs=%u\n", __func__, |
| 5874 | err, devlist->num_devs); |
| 5875 | |
| 5876 | return err; |
| 5877 | } |
| 5878 | EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); |
| 5879 | |
| 5880 | static int |
| 5881 | _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) |
| 5882 | { |
| 5883 | struct nfs4_getdeviceinfo_args args = { |
| 5884 | .pdev = pdev, |
| 5885 | }; |
| 5886 | struct nfs4_getdeviceinfo_res res = { |
| 5887 | .pdev = pdev, |
| 5888 | }; |
| 5889 | struct rpc_message msg = { |
| 5890 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], |
| 5891 | .rpc_argp = &args, |
| 5892 | .rpc_resp = &res, |
| 5893 | }; |
| 5894 | int status; |
| 5895 | |
| 5896 | dprintk("--> %s\n", __func__); |
| 5897 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 5898 | dprintk("<-- %s status=%d\n", __func__, status); |
| 5899 | |
| 5900 | return status; |
| 5901 | } |
| 5902 | |
| 5903 | int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) |
| 5904 | { |
| 5905 | struct nfs4_exception exception = { }; |
| 5906 | int err; |
| 5907 | |
| 5908 | do { |
| 5909 | err = nfs4_handle_exception(server, |
| 5910 | _nfs4_proc_getdeviceinfo(server, pdev), |
| 5911 | &exception); |
| 5912 | } while (exception.retry); |
| 5913 | return err; |
| 5914 | } |
| 5915 | EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); |
| 5916 | |
| 5917 | static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) |
| 5918 | { |
| 5919 | struct nfs4_layoutcommit_data *data = calldata; |
| 5920 | struct nfs_server *server = NFS_SERVER(data->args.inode); |
| 5921 | |
| 5922 | if (nfs4_setup_sequence(server, &data->args.seq_args, |
| 5923 | &data->res.seq_res, 1, task)) |
| 5924 | return; |
| 5925 | rpc_call_start(task); |
| 5926 | } |
| 5927 | |
| 5928 | static void |
| 5929 | nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) |
| 5930 | { |
| 5931 | struct nfs4_layoutcommit_data *data = calldata; |
| 5932 | struct nfs_server *server = NFS_SERVER(data->args.inode); |
| 5933 | |
| 5934 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| 5935 | return; |
| 5936 | |
| 5937 | switch (task->tk_status) { /* Just ignore these failures */ |
| 5938 | case NFS4ERR_DELEG_REVOKED: /* layout was recalled */ |
| 5939 | case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ |
| 5940 | case NFS4ERR_BADLAYOUT: /* no layout */ |
| 5941 | case NFS4ERR_GRACE: /* loca_recalim always false */ |
| 5942 | task->tk_status = 0; |
| 5943 | } |
| 5944 | |
| 5945 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { |
| 5946 | rpc_restart_call_prepare(task); |
| 5947 | return; |
| 5948 | } |
| 5949 | |
| 5950 | if (task->tk_status == 0) |
| 5951 | nfs_post_op_update_inode_force_wcc(data->args.inode, |
| 5952 | data->res.fattr); |
| 5953 | } |
| 5954 | |
| 5955 | static void nfs4_layoutcommit_release(void *calldata) |
| 5956 | { |
| 5957 | struct nfs4_layoutcommit_data *data = calldata; |
| 5958 | struct pnfs_layout_segment *lseg, *tmp; |
| 5959 | unsigned long *bitlock = &NFS_I(data->args.inode)->flags; |
| 5960 | |
| 5961 | pnfs_cleanup_layoutcommit(data); |
| 5962 | /* Matched by references in pnfs_set_layoutcommit */ |
| 5963 | list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) { |
| 5964 | list_del_init(&lseg->pls_lc_list); |
| 5965 | if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, |
| 5966 | &lseg->pls_flags)) |
| 5967 | put_lseg(lseg); |
| 5968 | } |
| 5969 | |
| 5970 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); |
| 5971 | smp_mb__after_clear_bit(); |
| 5972 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
| 5973 | |
| 5974 | put_rpccred(data->cred); |
| 5975 | kfree(data); |
| 5976 | } |
| 5977 | |
| 5978 | static const struct rpc_call_ops nfs4_layoutcommit_ops = { |
| 5979 | .rpc_call_prepare = nfs4_layoutcommit_prepare, |
| 5980 | .rpc_call_done = nfs4_layoutcommit_done, |
| 5981 | .rpc_release = nfs4_layoutcommit_release, |
| 5982 | }; |
| 5983 | |
| 5984 | int |
| 5985 | nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) |
| 5986 | { |
| 5987 | struct rpc_message msg = { |
| 5988 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], |
| 5989 | .rpc_argp = &data->args, |
| 5990 | .rpc_resp = &data->res, |
| 5991 | .rpc_cred = data->cred, |
| 5992 | }; |
| 5993 | struct rpc_task_setup task_setup_data = { |
| 5994 | .task = &data->task, |
| 5995 | .rpc_client = NFS_CLIENT(data->args.inode), |
| 5996 | .rpc_message = &msg, |
| 5997 | .callback_ops = &nfs4_layoutcommit_ops, |
| 5998 | .callback_data = data, |
| 5999 | .flags = RPC_TASK_ASYNC, |
| 6000 | }; |
| 6001 | struct rpc_task *task; |
| 6002 | int status = 0; |
| 6003 | |
| 6004 | dprintk("NFS: %4d initiating layoutcommit call. sync %d " |
| 6005 | "lbw: %llu inode %lu\n", |
| 6006 | data->task.tk_pid, sync, |
| 6007 | data->args.lastbytewritten, |
| 6008 | data->args.inode->i_ino); |
| 6009 | |
| 6010 | task = rpc_run_task(&task_setup_data); |
| 6011 | if (IS_ERR(task)) |
| 6012 | return PTR_ERR(task); |
| 6013 | if (sync == false) |
| 6014 | goto out; |
| 6015 | status = nfs4_wait_for_completion_rpc_task(task); |
| 6016 | if (status != 0) |
| 6017 | goto out; |
| 6018 | status = task->tk_status; |
| 6019 | out: |
| 6020 | dprintk("%s: status %d\n", __func__, status); |
| 6021 | rpc_put_task(task); |
| 6022 | return status; |
| 6023 | } |
| 6024 | |
| 6025 | static int |
| 6026 | _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
| 6027 | struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) |
| 6028 | { |
| 6029 | struct nfs41_secinfo_no_name_args args = { |
| 6030 | .style = SECINFO_STYLE_CURRENT_FH, |
| 6031 | }; |
| 6032 | struct nfs4_secinfo_res res = { |
| 6033 | .flavors = flavors, |
| 6034 | }; |
| 6035 | struct rpc_message msg = { |
| 6036 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], |
| 6037 | .rpc_argp = &args, |
| 6038 | .rpc_resp = &res, |
| 6039 | }; |
| 6040 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| 6041 | } |
| 6042 | |
| 6043 | static int |
| 6044 | nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
| 6045 | struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) |
| 6046 | { |
| 6047 | struct nfs4_exception exception = { }; |
| 6048 | int err; |
| 6049 | do { |
| 6050 | err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); |
| 6051 | switch (err) { |
| 6052 | case 0: |
| 6053 | case -NFS4ERR_WRONGSEC: |
| 6054 | case -NFS4ERR_NOTSUPP: |
| 6055 | break; |
| 6056 | default: |
| 6057 | err = nfs4_handle_exception(server, err, &exception); |
| 6058 | } |
| 6059 | } while (exception.retry); |
| 6060 | return err; |
| 6061 | } |
| 6062 | |
| 6063 | static int |
| 6064 | nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| 6065 | struct nfs_fsinfo *info) |
| 6066 | { |
| 6067 | int err; |
| 6068 | struct page *page; |
| 6069 | rpc_authflavor_t flavor; |
| 6070 | struct nfs4_secinfo_flavors *flavors; |
| 6071 | |
| 6072 | page = alloc_page(GFP_KERNEL); |
| 6073 | if (!page) { |
| 6074 | err = -ENOMEM; |
| 6075 | goto out; |
| 6076 | } |
| 6077 | |
| 6078 | flavors = page_address(page); |
| 6079 | err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); |
| 6080 | |
| 6081 | /* |
| 6082 | * Fall back on "guess and check" method if |
| 6083 | * the server doesn't support SECINFO_NO_NAME |
| 6084 | */ |
| 6085 | if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) { |
| 6086 | err = nfs4_find_root_sec(server, fhandle, info); |
| 6087 | goto out_freepage; |
| 6088 | } |
| 6089 | if (err) |
| 6090 | goto out_freepage; |
| 6091 | |
| 6092 | flavor = nfs_find_best_sec(flavors); |
| 6093 | if (err == 0) |
| 6094 | err = nfs4_lookup_root_sec(server, fhandle, info, flavor); |
| 6095 | |
| 6096 | out_freepage: |
| 6097 | put_page(page); |
| 6098 | if (err == -EACCES) |
| 6099 | return -EPERM; |
| 6100 | out: |
| 6101 | return err; |
| 6102 | } |
| 6103 | static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state) |
| 6104 | { |
| 6105 | int status; |
| 6106 | struct nfs41_test_stateid_args args = { |
| 6107 | .stateid = &state->stateid, |
| 6108 | }; |
| 6109 | struct nfs41_test_stateid_res res; |
| 6110 | struct rpc_message msg = { |
| 6111 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], |
| 6112 | .rpc_argp = &args, |
| 6113 | .rpc_resp = &res, |
| 6114 | }; |
| 6115 | args.seq_args.sa_session = res.seq_res.sr_session = NULL; |
| 6116 | status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1); |
| 6117 | return status; |
| 6118 | } |
| 6119 | |
| 6120 | static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state) |
| 6121 | { |
| 6122 | struct nfs4_exception exception = { }; |
| 6123 | int err; |
| 6124 | do { |
| 6125 | err = nfs4_handle_exception(server, |
| 6126 | _nfs41_test_stateid(server, state), |
| 6127 | &exception); |
| 6128 | } while (exception.retry); |
| 6129 | return err; |
| 6130 | } |
| 6131 | |
| 6132 | static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state) |
| 6133 | { |
| 6134 | int status; |
| 6135 | struct nfs41_free_stateid_args args = { |
| 6136 | .stateid = &state->stateid, |
| 6137 | }; |
| 6138 | struct nfs41_free_stateid_res res; |
| 6139 | struct rpc_message msg = { |
| 6140 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], |
| 6141 | .rpc_argp = &args, |
| 6142 | .rpc_resp = &res, |
| 6143 | }; |
| 6144 | |
| 6145 | args.seq_args.sa_session = res.seq_res.sr_session = NULL; |
| 6146 | status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1); |
| 6147 | return status; |
| 6148 | } |
| 6149 | |
| 6150 | static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state) |
| 6151 | { |
| 6152 | struct nfs4_exception exception = { }; |
| 6153 | int err; |
| 6154 | do { |
| 6155 | err = nfs4_handle_exception(server, |
| 6156 | _nfs4_free_stateid(server, state), |
| 6157 | &exception); |
| 6158 | } while (exception.retry); |
| 6159 | return err; |
| 6160 | } |
| 6161 | #endif /* CONFIG_NFS_V4_1 */ |
| 6162 | |
| 6163 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
| 6164 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| 6165 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| 6166 | .recover_open = nfs4_open_reclaim, |
| 6167 | .recover_lock = nfs4_lock_reclaim, |
| 6168 | .establish_clid = nfs4_init_clientid, |
| 6169 | .get_clid_cred = nfs4_get_setclientid_cred, |
| 6170 | }; |
| 6171 | |
| 6172 | #if defined(CONFIG_NFS_V4_1) |
| 6173 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { |
| 6174 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| 6175 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| 6176 | .recover_open = nfs4_open_reclaim, |
| 6177 | .recover_lock = nfs4_lock_reclaim, |
| 6178 | .establish_clid = nfs41_init_clientid, |
| 6179 | .get_clid_cred = nfs4_get_exchange_id_cred, |
| 6180 | .reclaim_complete = nfs41_proc_reclaim_complete, |
| 6181 | }; |
| 6182 | #endif /* CONFIG_NFS_V4_1 */ |
| 6183 | |
| 6184 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { |
| 6185 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| 6186 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| 6187 | .recover_open = nfs4_open_expired, |
| 6188 | .recover_lock = nfs4_lock_expired, |
| 6189 | .establish_clid = nfs4_init_clientid, |
| 6190 | .get_clid_cred = nfs4_get_setclientid_cred, |
| 6191 | }; |
| 6192 | |
| 6193 | #if defined(CONFIG_NFS_V4_1) |
| 6194 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { |
| 6195 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| 6196 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| 6197 | .recover_open = nfs41_open_expired, |
| 6198 | .recover_lock = nfs41_lock_expired, |
| 6199 | .establish_clid = nfs41_init_clientid, |
| 6200 | .get_clid_cred = nfs4_get_exchange_id_cred, |
| 6201 | }; |
| 6202 | #endif /* CONFIG_NFS_V4_1 */ |
| 6203 | |
| 6204 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
| 6205 | .sched_state_renewal = nfs4_proc_async_renew, |
| 6206 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
| 6207 | .renew_lease = nfs4_proc_renew, |
| 6208 | }; |
| 6209 | |
| 6210 | #if defined(CONFIG_NFS_V4_1) |
| 6211 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { |
| 6212 | .sched_state_renewal = nfs41_proc_async_sequence, |
| 6213 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
| 6214 | .renew_lease = nfs4_proc_sequence, |
| 6215 | }; |
| 6216 | #endif |
| 6217 | |
| 6218 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
| 6219 | .minor_version = 0, |
| 6220 | .call_sync = _nfs4_call_sync, |
| 6221 | .validate_stateid = nfs4_validate_delegation_stateid, |
| 6222 | .find_root_sec = nfs4_find_root_sec, |
| 6223 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
| 6224 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, |
| 6225 | .state_renewal_ops = &nfs40_state_renewal_ops, |
| 6226 | }; |
| 6227 | |
| 6228 | #if defined(CONFIG_NFS_V4_1) |
| 6229 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { |
| 6230 | .minor_version = 1, |
| 6231 | .call_sync = _nfs4_call_sync_session, |
| 6232 | .validate_stateid = nfs41_validate_delegation_stateid, |
| 6233 | .find_root_sec = nfs41_find_root_sec, |
| 6234 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
| 6235 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
| 6236 | .state_renewal_ops = &nfs41_state_renewal_ops, |
| 6237 | }; |
| 6238 | #endif |
| 6239 | |
| 6240 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
| 6241 | [0] = &nfs_v4_0_minor_ops, |
| 6242 | #if defined(CONFIG_NFS_V4_1) |
| 6243 | [1] = &nfs_v4_1_minor_ops, |
| 6244 | #endif |
| 6245 | }; |
| 6246 | |
| 6247 | static const struct inode_operations nfs4_file_inode_operations = { |
| 6248 | .permission = nfs_permission, |
| 6249 | .getattr = nfs_getattr, |
| 6250 | .setattr = nfs_setattr, |
| 6251 | .getxattr = generic_getxattr, |
| 6252 | .setxattr = generic_setxattr, |
| 6253 | .listxattr = generic_listxattr, |
| 6254 | .removexattr = generic_removexattr, |
| 6255 | }; |
| 6256 | |
| 6257 | const struct nfs_rpc_ops nfs_v4_clientops = { |
| 6258 | .version = 4, /* protocol version */ |
| 6259 | .dentry_ops = &nfs4_dentry_operations, |
| 6260 | .dir_inode_ops = &nfs4_dir_inode_operations, |
| 6261 | .file_inode_ops = &nfs4_file_inode_operations, |
| 6262 | .file_ops = &nfs4_file_operations, |
| 6263 | .getroot = nfs4_proc_get_root, |
| 6264 | .getattr = nfs4_proc_getattr, |
| 6265 | .setattr = nfs4_proc_setattr, |
| 6266 | .lookup = nfs4_proc_lookup, |
| 6267 | .access = nfs4_proc_access, |
| 6268 | .readlink = nfs4_proc_readlink, |
| 6269 | .create = nfs4_proc_create, |
| 6270 | .remove = nfs4_proc_remove, |
| 6271 | .unlink_setup = nfs4_proc_unlink_setup, |
| 6272 | .unlink_done = nfs4_proc_unlink_done, |
| 6273 | .rename = nfs4_proc_rename, |
| 6274 | .rename_setup = nfs4_proc_rename_setup, |
| 6275 | .rename_done = nfs4_proc_rename_done, |
| 6276 | .link = nfs4_proc_link, |
| 6277 | .symlink = nfs4_proc_symlink, |
| 6278 | .mkdir = nfs4_proc_mkdir, |
| 6279 | .rmdir = nfs4_proc_remove, |
| 6280 | .readdir = nfs4_proc_readdir, |
| 6281 | .mknod = nfs4_proc_mknod, |
| 6282 | .statfs = nfs4_proc_statfs, |
| 6283 | .fsinfo = nfs4_proc_fsinfo, |
| 6284 | .pathconf = nfs4_proc_pathconf, |
| 6285 | .set_capabilities = nfs4_server_capabilities, |
| 6286 | .decode_dirent = nfs4_decode_dirent, |
| 6287 | .read_setup = nfs4_proc_read_setup, |
| 6288 | .read_done = nfs4_read_done, |
| 6289 | .write_setup = nfs4_proc_write_setup, |
| 6290 | .write_done = nfs4_write_done, |
| 6291 | .commit_setup = nfs4_proc_commit_setup, |
| 6292 | .commit_done = nfs4_commit_done, |
| 6293 | .lock = nfs4_proc_lock, |
| 6294 | .clear_acl_cache = nfs4_zap_acl_attr, |
| 6295 | .close_context = nfs4_close_context, |
| 6296 | .open_context = nfs4_atomic_open, |
| 6297 | .init_client = nfs4_init_client, |
| 6298 | .secinfo = nfs4_proc_secinfo, |
| 6299 | }; |
| 6300 | |
| 6301 | static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { |
| 6302 | .prefix = XATTR_NAME_NFSV4_ACL, |
| 6303 | .list = nfs4_xattr_list_nfs4_acl, |
| 6304 | .get = nfs4_xattr_get_nfs4_acl, |
| 6305 | .set = nfs4_xattr_set_nfs4_acl, |
| 6306 | }; |
| 6307 | |
| 6308 | const struct xattr_handler *nfs4_xattr_handlers[] = { |
| 6309 | &nfs4_xattr_nfs4_acl_handler, |
| 6310 | NULL |
| 6311 | }; |
| 6312 | |
| 6313 | /* |
| 6314 | * Local variables: |
| 6315 | * c-basic-offset: 8 |
| 6316 | * End: |
| 6317 | */ |