Commit | Line | Data |
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1da177e4 LT |
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/utsname.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/namei.h> | |
02a913a7 | 50 | #include <linux/mount.h> |
1da177e4 | 51 | |
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 LT |
53 | #include "delegation.h" |
54 | ||
55 | #define NFSDBG_FACILITY NFSDBG_PROC | |
56 | ||
57 | #define NFS4_POLL_RETRY_MIN (1*HZ) | |
58 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
59 | ||
0a8838f9 | 60 | static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid); |
1da177e4 | 61 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
faf5f49c | 62 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); |
1da177e4 | 63 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
faf5f49c | 64 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
1da177e4 LT |
65 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
66 | extern struct rpc_procinfo nfs4_procedures[]; | |
67 | ||
1da177e4 LT |
68 | /* Prevent leaks of NFSv4 errors into userland */ |
69 | int nfs4_map_errors(int err) | |
70 | { | |
71 | if (err < -1000) { | |
72 | dprintk("%s could not handle NFSv4 error %d\n", | |
73 | __FUNCTION__, -err); | |
74 | return -EIO; | |
75 | } | |
76 | return err; | |
77 | } | |
78 | ||
79 | /* | |
80 | * This is our standard bitmap for GETATTR requests. | |
81 | */ | |
82 | const u32 nfs4_fattr_bitmap[2] = { | |
83 | FATTR4_WORD0_TYPE | |
84 | | FATTR4_WORD0_CHANGE | |
85 | | FATTR4_WORD0_SIZE | |
86 | | FATTR4_WORD0_FSID | |
87 | | FATTR4_WORD0_FILEID, | |
88 | FATTR4_WORD1_MODE | |
89 | | FATTR4_WORD1_NUMLINKS | |
90 | | FATTR4_WORD1_OWNER | |
91 | | FATTR4_WORD1_OWNER_GROUP | |
92 | | FATTR4_WORD1_RAWDEV | |
93 | | FATTR4_WORD1_SPACE_USED | |
94 | | FATTR4_WORD1_TIME_ACCESS | |
95 | | FATTR4_WORD1_TIME_METADATA | |
96 | | FATTR4_WORD1_TIME_MODIFY | |
97 | }; | |
98 | ||
99 | const u32 nfs4_statfs_bitmap[2] = { | |
100 | FATTR4_WORD0_FILES_AVAIL | |
101 | | FATTR4_WORD0_FILES_FREE | |
102 | | FATTR4_WORD0_FILES_TOTAL, | |
103 | FATTR4_WORD1_SPACE_AVAIL | |
104 | | FATTR4_WORD1_SPACE_FREE | |
105 | | FATTR4_WORD1_SPACE_TOTAL | |
106 | }; | |
107 | ||
4ce79717 | 108 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
109 | FATTR4_WORD0_MAXLINK |
110 | | FATTR4_WORD0_MAXNAME, | |
111 | 0 | |
112 | }; | |
113 | ||
114 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
115 | | FATTR4_WORD0_MAXREAD | |
116 | | FATTR4_WORD0_MAXWRITE | |
117 | | FATTR4_WORD0_LEASE_TIME, | |
118 | 0 | |
119 | }; | |
120 | ||
121 | static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, | |
122 | struct nfs4_readdir_arg *readdir) | |
123 | { | |
124 | u32 *start, *p; | |
125 | ||
126 | BUG_ON(readdir->count < 80); | |
127 | if (cookie > 2) { | |
b7ef1956 | 128 | readdir->cookie = cookie; |
1da177e4 LT |
129 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
130 | return; | |
131 | } | |
132 | ||
133 | readdir->cookie = 0; | |
134 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
135 | if (cookie == 2) | |
136 | return; | |
137 | ||
138 | /* | |
139 | * NFSv4 servers do not return entries for '.' and '..' | |
140 | * Therefore, we fake these entries here. We let '.' | |
141 | * have cookie 0 and '..' have cookie 1. Note that | |
142 | * when talking to the server, we always send cookie 0 | |
143 | * instead of 1 or 2. | |
144 | */ | |
145 | start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0); | |
146 | ||
147 | if (cookie == 0) { | |
148 | *p++ = xdr_one; /* next */ | |
149 | *p++ = xdr_zero; /* cookie, first word */ | |
150 | *p++ = xdr_one; /* cookie, second word */ | |
151 | *p++ = xdr_one; /* entry len */ | |
152 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
153 | p++; | |
154 | *p++ = xdr_one; /* bitmap length */ | |
155 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
156 | *p++ = htonl(8); /* attribute buffer length */ | |
157 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); | |
158 | } | |
159 | ||
160 | *p++ = xdr_one; /* next */ | |
161 | *p++ = xdr_zero; /* cookie, first word */ | |
162 | *p++ = xdr_two; /* cookie, second word */ | |
163 | *p++ = xdr_two; /* entry len */ | |
164 | memcpy(p, "..\0\0", 4); /* entry */ | |
165 | p++; | |
166 | *p++ = xdr_one; /* bitmap length */ | |
167 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
168 | *p++ = htonl(8); /* attribute buffer length */ | |
169 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); | |
170 | ||
171 | readdir->pgbase = (char *)p - (char *)start; | |
172 | readdir->count -= readdir->pgbase; | |
173 | kunmap_atomic(start, KM_USER0); | |
174 | } | |
175 | ||
176 | static void | |
177 | renew_lease(struct nfs_server *server, unsigned long timestamp) | |
178 | { | |
179 | struct nfs4_client *clp = server->nfs4_state; | |
180 | spin_lock(&clp->cl_lock); | |
181 | if (time_before(clp->cl_last_renewal,timestamp)) | |
182 | clp->cl_last_renewal = timestamp; | |
183 | spin_unlock(&clp->cl_lock); | |
184 | } | |
185 | ||
186 | static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) | |
187 | { | |
188 | struct nfs_inode *nfsi = NFS_I(inode); | |
189 | ||
decf491f TM |
190 | spin_lock(&inode->i_lock); |
191 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
1da177e4 LT |
192 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
193 | nfsi->change_attr = cinfo->after; | |
decf491f | 194 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
195 | } |
196 | ||
9512135d | 197 | /* Helper for asynchronous RPC calls */ |
4ce70ada | 198 | static int nfs4_call_async(struct rpc_clnt *clnt, |
963d8fe5 | 199 | const struct rpc_call_ops *tk_ops, void *calldata) |
9512135d TM |
200 | { |
201 | struct rpc_task *task; | |
202 | ||
963d8fe5 | 203 | if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata))) |
9512135d | 204 | return -ENOMEM; |
9512135d TM |
205 | rpc_execute(task); |
206 | return 0; | |
207 | } | |
208 | ||
06f814a3 TM |
209 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
210 | { | |
211 | sigset_t oldset; | |
212 | int ret; | |
213 | ||
214 | rpc_clnt_sigmask(task->tk_client, &oldset); | |
215 | ret = rpc_wait_for_completion_task(task); | |
216 | rpc_clnt_sigunmask(task->tk_client, &oldset); | |
217 | return ret; | |
218 | } | |
219 | ||
1da177e4 LT |
220 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
221 | { | |
222 | struct inode *inode = state->inode; | |
223 | ||
224 | open_flags &= (FMODE_READ|FMODE_WRITE); | |
d530838b | 225 | /* Protect against nfs4_find_state_byowner() */ |
ec073428 | 226 | spin_lock(&state->owner->so_lock); |
1da177e4 | 227 | spin_lock(&inode->i_lock); |
4cecb76f TM |
228 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
229 | if ((open_flags & FMODE_WRITE)) | |
230 | state->nwriters++; | |
1da177e4 LT |
231 | if (open_flags & FMODE_READ) |
232 | state->nreaders++; | |
4cecb76f | 233 | nfs4_state_set_mode_locked(state, state->state | open_flags); |
1da177e4 | 234 | spin_unlock(&inode->i_lock); |
ec073428 | 235 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
236 | } |
237 | ||
238 | /* | |
239 | * OPEN_RECLAIM: | |
240 | * reclaim state on the server after a reboot. | |
1da177e4 LT |
241 | */ |
242 | static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
243 | { | |
244 | struct inode *inode = state->inode; | |
245 | struct nfs_server *server = NFS_SERVER(inode); | |
246 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; | |
247 | struct nfs_openargs o_arg = { | |
248 | .fh = NFS_FH(inode), | |
1da177e4 LT |
249 | .id = sp->so_id, |
250 | .open_flags = state->state, | |
251 | .clientid = server->nfs4_state->cl_clientid, | |
252 | .claim = NFS4_OPEN_CLAIM_PREVIOUS, | |
253 | .bitmask = server->attr_bitmask, | |
254 | }; | |
255 | struct nfs_openres o_res = { | |
256 | .server = server, /* Grrr */ | |
257 | }; | |
258 | struct rpc_message msg = { | |
259 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], | |
260 | .rpc_argp = &o_arg, | |
261 | .rpc_resp = &o_res, | |
262 | .rpc_cred = sp->so_cred, | |
263 | }; | |
264 | int status; | |
265 | ||
266 | if (delegation != NULL) { | |
267 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
268 | memcpy(&state->stateid, &delegation->stateid, | |
269 | sizeof(state->stateid)); | |
270 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
271 | return 0; | |
272 | } | |
273 | o_arg.u.delegation_type = delegation->type; | |
274 | } | |
cee54fc9 TM |
275 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
276 | if (o_arg.seqid == NULL) | |
277 | return -ENOMEM; | |
1da177e4 | 278 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
cee54fc9 TM |
279 | /* Confirm the sequence as being established */ |
280 | nfs_confirm_seqid(&sp->so_seqid, status); | |
281 | nfs_increment_open_seqid(status, o_arg.seqid); | |
1da177e4 LT |
282 | if (status == 0) { |
283 | memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); | |
284 | if (o_res.delegation_type != 0) { | |
285 | nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); | |
286 | /* Did the server issue an immediate delegation recall? */ | |
287 | if (o_res.do_recall) | |
288 | nfs_async_inode_return_delegation(inode, &o_res.stateid); | |
289 | } | |
290 | } | |
cee54fc9 | 291 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
292 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
293 | /* Ensure we update the inode attributes */ | |
294 | NFS_CACHEINV(inode); | |
295 | return status; | |
296 | } | |
297 | ||
298 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
299 | { | |
300 | struct nfs_server *server = NFS_SERVER(state->inode); | |
301 | struct nfs4_exception exception = { }; | |
302 | int err; | |
303 | do { | |
304 | err = _nfs4_open_reclaim(sp, state); | |
202b50dc TM |
305 | if (err != -NFS4ERR_DELAY) |
306 | break; | |
307 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
308 | } while (exception.retry); |
309 | return err; | |
310 | } | |
311 | ||
312 | static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
313 | { | |
314 | struct nfs4_state_owner *sp = state->owner; | |
315 | struct inode *inode = dentry->d_inode; | |
316 | struct nfs_server *server = NFS_SERVER(inode); | |
317 | struct dentry *parent = dget_parent(dentry); | |
318 | struct nfs_openargs arg = { | |
319 | .fh = NFS_FH(parent->d_inode), | |
320 | .clientid = server->nfs4_state->cl_clientid, | |
321 | .name = &dentry->d_name, | |
322 | .id = sp->so_id, | |
323 | .server = server, | |
324 | .bitmask = server->attr_bitmask, | |
325 | .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR, | |
326 | }; | |
327 | struct nfs_openres res = { | |
328 | .server = server, | |
329 | }; | |
330 | struct rpc_message msg = { | |
331 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], | |
332 | .rpc_argp = &arg, | |
333 | .rpc_resp = &res, | |
334 | .rpc_cred = sp->so_cred, | |
335 | }; | |
336 | int status = 0; | |
337 | ||
1da177e4 LT |
338 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
339 | goto out; | |
340 | if (state->state == 0) | |
341 | goto out; | |
cee54fc9 TM |
342 | arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
343 | status = -ENOMEM; | |
344 | if (arg.seqid == NULL) | |
345 | goto out; | |
1da177e4 LT |
346 | arg.open_flags = state->state; |
347 | memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data)); | |
348 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); | |
cee54fc9 | 349 | nfs_increment_open_seqid(status, arg.seqid); |
0a8838f9 TM |
350 | if (status != 0) |
351 | goto out_free; | |
352 | if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
353 | status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode), | |
354 | sp, &res.stateid, arg.seqid); | |
355 | if (status != 0) | |
356 | goto out_free; | |
357 | } | |
358 | nfs_confirm_seqid(&sp->so_seqid, 0); | |
1da177e4 LT |
359 | if (status >= 0) { |
360 | memcpy(state->stateid.data, res.stateid.data, | |
361 | sizeof(state->stateid.data)); | |
362 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
363 | } | |
0a8838f9 | 364 | out_free: |
cee54fc9 | 365 | nfs_free_seqid(arg.seqid); |
1da177e4 | 366 | out: |
1da177e4 LT |
367 | dput(parent); |
368 | return status; | |
369 | } | |
370 | ||
371 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
372 | { | |
373 | struct nfs4_exception exception = { }; | |
374 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
375 | int err; | |
376 | do { | |
377 | err = _nfs4_open_delegation_recall(dentry, state); | |
378 | switch (err) { | |
379 | case 0: | |
380 | return err; | |
381 | case -NFS4ERR_STALE_CLIENTID: | |
382 | case -NFS4ERR_STALE_STATEID: | |
383 | case -NFS4ERR_EXPIRED: | |
384 | /* Don't recall a delegation if it was lost */ | |
385 | nfs4_schedule_state_recovery(server->nfs4_state); | |
386 | return err; | |
387 | } | |
388 | err = nfs4_handle_exception(server, err, &exception); | |
389 | } while (exception.retry); | |
390 | return err; | |
391 | } | |
392 | ||
0a8838f9 | 393 | static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid) |
1da177e4 LT |
394 | { |
395 | struct nfs_open_confirmargs arg = { | |
396 | .fh = fh, | |
cee54fc9 | 397 | .seqid = seqid, |
1da177e4 LT |
398 | .stateid = *stateid, |
399 | }; | |
400 | struct nfs_open_confirmres res; | |
401 | struct rpc_message msg = { | |
402 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
403 | .rpc_argp = &arg, | |
404 | .rpc_resp = &res, | |
405 | .rpc_cred = sp->so_cred, | |
406 | }; | |
407 | int status; | |
408 | ||
409 | status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR); | |
cee54fc9 TM |
410 | /* Confirm the sequence as being established */ |
411 | nfs_confirm_seqid(&sp->so_seqid, status); | |
412 | nfs_increment_open_seqid(status, seqid); | |
1da177e4 LT |
413 | if (status >= 0) |
414 | memcpy(stateid, &res.stateid, sizeof(*stateid)); | |
415 | return status; | |
416 | } | |
417 | ||
418 | static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res) | |
419 | { | |
420 | struct nfs_server *server = NFS_SERVER(dir); | |
421 | struct rpc_message msg = { | |
422 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
423 | .rpc_argp = o_arg, | |
424 | .rpc_resp = o_res, | |
425 | .rpc_cred = sp->so_cred, | |
426 | }; | |
427 | int status; | |
428 | ||
429 | /* Update sequence id. The caller must serialize! */ | |
1da177e4 LT |
430 | o_arg->id = sp->so_id; |
431 | o_arg->clientid = sp->so_client->cl_clientid; | |
432 | ||
433 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); | |
6f926b5b TM |
434 | if (status == 0) { |
435 | /* OPEN on anything except a regular file is disallowed in NFSv4 */ | |
436 | switch (o_res->f_attr->mode & S_IFMT) { | |
437 | case S_IFREG: | |
438 | break; | |
439 | case S_IFLNK: | |
440 | status = -ELOOP; | |
441 | break; | |
442 | case S_IFDIR: | |
443 | status = -EISDIR; | |
444 | break; | |
445 | default: | |
446 | status = -ENOTDIR; | |
447 | } | |
448 | } | |
449 | ||
cee54fc9 | 450 | nfs_increment_open_seqid(status, o_arg->seqid); |
1da177e4 LT |
451 | if (status != 0) |
452 | goto out; | |
56ae19f3 TM |
453 | if (o_arg->open_flags & O_CREAT) { |
454 | update_changeattr(dir, &o_res->cinfo); | |
455 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
456 | } else | |
457 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 LT |
458 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
459 | status = _nfs4_proc_open_confirm(server->client, &o_res->fh, | |
cee54fc9 | 460 | sp, &o_res->stateid, o_arg->seqid); |
1da177e4 LT |
461 | if (status != 0) |
462 | goto out; | |
463 | } | |
cee54fc9 | 464 | nfs_confirm_seqid(&sp->so_seqid, 0); |
1da177e4 LT |
465 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
466 | status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); | |
467 | out: | |
468 | return status; | |
469 | } | |
470 | ||
471 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
472 | { | |
473 | struct nfs_access_entry cache; | |
474 | int mask = 0; | |
475 | int status; | |
476 | ||
477 | if (openflags & FMODE_READ) | |
478 | mask |= MAY_READ; | |
479 | if (openflags & FMODE_WRITE) | |
480 | mask |= MAY_WRITE; | |
481 | status = nfs_access_get_cached(inode, cred, &cache); | |
482 | if (status == 0) | |
483 | goto out; | |
484 | ||
485 | /* Be clever: ask server to check for all possible rights */ | |
486 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
487 | cache.cred = cred; | |
488 | cache.jiffies = jiffies; | |
489 | status = _nfs4_proc_access(inode, &cache); | |
490 | if (status != 0) | |
491 | return status; | |
492 | nfs_access_add_cache(inode, &cache); | |
493 | out: | |
494 | if ((cache.mask & mask) == mask) | |
495 | return 0; | |
496 | return -EACCES; | |
497 | } | |
498 | ||
499 | /* | |
500 | * OPEN_EXPIRED: | |
501 | * reclaim state on the server after a network partition. | |
502 | * Assumes caller holds the appropriate lock | |
503 | */ | |
504 | static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
505 | { | |
506 | struct dentry *parent = dget_parent(dentry); | |
507 | struct inode *dir = parent->d_inode; | |
508 | struct inode *inode = state->inode; | |
509 | struct nfs_server *server = NFS_SERVER(dir); | |
510 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; | |
56ae19f3 | 511 | struct nfs_fattr f_attr, dir_attr; |
1da177e4 LT |
512 | struct nfs_openargs o_arg = { |
513 | .fh = NFS_FH(dir), | |
514 | .open_flags = state->state, | |
515 | .name = &dentry->d_name, | |
516 | .bitmask = server->attr_bitmask, | |
517 | .claim = NFS4_OPEN_CLAIM_NULL, | |
518 | }; | |
519 | struct nfs_openres o_res = { | |
520 | .f_attr = &f_attr, | |
56ae19f3 | 521 | .dir_attr = &dir_attr, |
1da177e4 LT |
522 | .server = server, |
523 | }; | |
524 | int status = 0; | |
525 | ||
526 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
527 | status = _nfs4_do_access(inode, sp->so_cred, state->state); | |
528 | if (status < 0) | |
529 | goto out; | |
530 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); | |
531 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
532 | goto out; | |
533 | } | |
cee54fc9 TM |
534 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
535 | status = -ENOMEM; | |
536 | if (o_arg.seqid == NULL) | |
537 | goto out; | |
0e574af1 | 538 | nfs_fattr_init(&f_attr); |
56ae19f3 | 539 | nfs_fattr_init(&dir_attr); |
1da177e4 LT |
540 | status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
541 | if (status != 0) | |
542 | goto out_nodeleg; | |
543 | /* Check if files differ */ | |
544 | if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT)) | |
545 | goto out_stale; | |
546 | /* Has the file handle changed? */ | |
547 | if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) { | |
548 | /* Verify if the change attributes are the same */ | |
549 | if (f_attr.change_attr != NFS_I(inode)->change_attr) | |
550 | goto out_stale; | |
551 | if (nfs_size_to_loff_t(f_attr.size) != inode->i_size) | |
552 | goto out_stale; | |
553 | /* Lets just pretend that this is the same file */ | |
554 | nfs_copy_fh(NFS_FH(inode), &o_res.fh); | |
555 | NFS_I(inode)->fileid = f_attr.fileid; | |
556 | } | |
557 | memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); | |
558 | if (o_res.delegation_type != 0) { | |
559 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) | |
560 | nfs_inode_set_delegation(inode, sp->so_cred, &o_res); | |
561 | else | |
562 | nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); | |
563 | } | |
564 | out_nodeleg: | |
cee54fc9 | 565 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
566 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
567 | out: | |
568 | dput(parent); | |
569 | return status; | |
570 | out_stale: | |
571 | status = -ESTALE; | |
572 | /* Invalidate the state owner so we don't ever use it again */ | |
573 | nfs4_drop_state_owner(sp); | |
574 | d_drop(dentry); | |
575 | /* Should we be trying to close that stateid? */ | |
576 | goto out_nodeleg; | |
577 | } | |
578 | ||
202b50dc TM |
579 | static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
580 | { | |
581 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
582 | struct nfs4_exception exception = { }; | |
583 | int err; | |
584 | ||
585 | do { | |
586 | err = _nfs4_open_expired(sp, state, dentry); | |
587 | if (err == -NFS4ERR_DELAY) | |
588 | nfs4_handle_exception(server, err, &exception); | |
589 | } while (exception.retry); | |
590 | return err; | |
591 | } | |
592 | ||
1da177e4 LT |
593 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
594 | { | |
595 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
596 | struct nfs_open_context *ctx; | |
597 | int status; | |
598 | ||
599 | spin_lock(&state->inode->i_lock); | |
600 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
601 | if (ctx->state != state) | |
602 | continue; | |
603 | get_nfs_open_context(ctx); | |
604 | spin_unlock(&state->inode->i_lock); | |
202b50dc | 605 | status = nfs4_do_open_expired(sp, state, ctx->dentry); |
1da177e4 LT |
606 | put_nfs_open_context(ctx); |
607 | return status; | |
608 | } | |
609 | spin_unlock(&state->inode->i_lock); | |
610 | return -ENOENT; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Returns an nfs4_state + an extra reference to the inode | |
615 | */ | |
616 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
617 | { | |
618 | struct nfs_delegation *delegation; | |
619 | struct nfs_server *server = NFS_SERVER(inode); | |
620 | struct nfs4_client *clp = server->nfs4_state; | |
621 | struct nfs_inode *nfsi = NFS_I(inode); | |
622 | struct nfs4_state_owner *sp = NULL; | |
623 | struct nfs4_state *state = NULL; | |
624 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
625 | int err; | |
626 | ||
627 | /* Protect against reboot recovery - NOTE ORDER! */ | |
628 | down_read(&clp->cl_sem); | |
629 | /* Protect against delegation recall */ | |
630 | down_read(&nfsi->rwsem); | |
631 | delegation = NFS_I(inode)->delegation; | |
632 | err = -ENOENT; | |
633 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
634 | goto out_err; | |
635 | err = -ENOMEM; | |
636 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
637 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
638 | goto out_err; | |
639 | } | |
1da177e4 LT |
640 | state = nfs4_get_open_state(inode, sp); |
641 | if (state == NULL) | |
642 | goto out_err; | |
643 | ||
644 | err = -ENOENT; | |
645 | if ((state->state & open_flags) == open_flags) { | |
646 | spin_lock(&inode->i_lock); | |
647 | if (open_flags & FMODE_READ) | |
648 | state->nreaders++; | |
649 | if (open_flags & FMODE_WRITE) | |
650 | state->nwriters++; | |
651 | spin_unlock(&inode->i_lock); | |
652 | goto out_ok; | |
653 | } else if (state->state != 0) | |
654 | goto out_err; | |
655 | ||
656 | lock_kernel(); | |
657 | err = _nfs4_do_access(inode, cred, open_flags); | |
658 | unlock_kernel(); | |
659 | if (err != 0) | |
660 | goto out_err; | |
661 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
662 | update_open_stateid(state, &delegation->stateid, open_flags); | |
663 | out_ok: | |
1da177e4 LT |
664 | nfs4_put_state_owner(sp); |
665 | up_read(&nfsi->rwsem); | |
666 | up_read(&clp->cl_sem); | |
667 | igrab(inode); | |
668 | *res = state; | |
669 | return 0; | |
670 | out_err: | |
671 | if (sp != NULL) { | |
672 | if (state != NULL) | |
673 | nfs4_put_open_state(state); | |
1da177e4 LT |
674 | nfs4_put_state_owner(sp); |
675 | } | |
676 | up_read(&nfsi->rwsem); | |
677 | up_read(&clp->cl_sem); | |
b8e5c4c2 TM |
678 | if (err != -EACCES) |
679 | nfs_inode_return_delegation(inode); | |
1da177e4 LT |
680 | return err; |
681 | } | |
682 | ||
683 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
684 | { | |
685 | struct nfs4_exception exception = { }; | |
686 | struct nfs4_state *res; | |
687 | int err; | |
688 | ||
689 | do { | |
690 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
691 | if (err == 0) | |
692 | break; | |
693 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
694 | err, &exception)); | |
695 | } while (exception.retry); | |
696 | return res; | |
697 | } | |
698 | ||
699 | /* | |
700 | * Returns an nfs4_state + an referenced inode | |
701 | */ | |
702 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
703 | { | |
704 | struct nfs4_state_owner *sp; | |
705 | struct nfs4_state *state = NULL; | |
706 | struct nfs_server *server = NFS_SERVER(dir); | |
707 | struct nfs4_client *clp = server->nfs4_state; | |
708 | struct inode *inode = NULL; | |
709 | int status; | |
56ae19f3 | 710 | struct nfs_fattr f_attr, dir_attr; |
1da177e4 LT |
711 | struct nfs_openargs o_arg = { |
712 | .fh = NFS_FH(dir), | |
713 | .open_flags = flags, | |
714 | .name = &dentry->d_name, | |
715 | .server = server, | |
716 | .bitmask = server->attr_bitmask, | |
717 | .claim = NFS4_OPEN_CLAIM_NULL, | |
718 | }; | |
719 | struct nfs_openres o_res = { | |
720 | .f_attr = &f_attr, | |
56ae19f3 | 721 | .dir_attr = &dir_attr, |
1da177e4 LT |
722 | .server = server, |
723 | }; | |
724 | ||
725 | /* Protect against reboot recovery conflicts */ | |
726 | down_read(&clp->cl_sem); | |
727 | status = -ENOMEM; | |
728 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
729 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
730 | goto out_err; | |
731 | } | |
732 | if (flags & O_EXCL) { | |
733 | u32 *p = (u32 *) o_arg.u.verifier.data; | |
734 | p[0] = jiffies; | |
735 | p[1] = current->pid; | |
736 | } else | |
737 | o_arg.u.attrs = sattr; | |
738 | /* Serialization for the sequence id */ | |
1da177e4 | 739 | |
cee54fc9 TM |
740 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
741 | if (o_arg.seqid == NULL) | |
742 | return -ENOMEM; | |
0e574af1 | 743 | nfs_fattr_init(&f_attr); |
56ae19f3 | 744 | nfs_fattr_init(&dir_attr); |
1da177e4 LT |
745 | status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
746 | if (status != 0) | |
747 | goto out_err; | |
748 | ||
749 | status = -ENOMEM; | |
750 | inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr); | |
751 | if (!inode) | |
752 | goto out_err; | |
753 | state = nfs4_get_open_state(inode, sp); | |
754 | if (!state) | |
755 | goto out_err; | |
756 | update_open_stateid(state, &o_res.stateid, flags); | |
757 | if (o_res.delegation_type != 0) | |
758 | nfs_inode_set_delegation(inode, cred, &o_res); | |
cee54fc9 | 759 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
760 | nfs4_put_state_owner(sp); |
761 | up_read(&clp->cl_sem); | |
762 | *res = state; | |
763 | return 0; | |
764 | out_err: | |
765 | if (sp != NULL) { | |
766 | if (state != NULL) | |
767 | nfs4_put_open_state(state); | |
cee54fc9 | 768 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
769 | nfs4_put_state_owner(sp); |
770 | } | |
771 | /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ | |
772 | up_read(&clp->cl_sem); | |
773 | if (inode != NULL) | |
774 | iput(inode); | |
775 | *res = NULL; | |
776 | return status; | |
777 | } | |
778 | ||
779 | ||
780 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
781 | { | |
782 | struct nfs4_exception exception = { }; | |
783 | struct nfs4_state *res; | |
784 | int status; | |
785 | ||
786 | do { | |
787 | status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); | |
788 | if (status == 0) | |
789 | break; | |
790 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
791 | * book-keeping w.r.t. state-changing operations | |
792 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
793 | * It is actually a sign of a bug on the client or on the server. | |
794 | * | |
795 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 796 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
797 | * have unhashed the old state_owner for us, and that we can |
798 | * therefore safely retry using a new one. We should still warn | |
799 | * the user though... | |
800 | */ | |
801 | if (status == -NFS4ERR_BAD_SEQID) { | |
802 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
803 | exception.retry = 1; | |
804 | continue; | |
805 | } | |
550f5747 TM |
806 | /* |
807 | * BAD_STATEID on OPEN means that the server cancelled our | |
808 | * state before it received the OPEN_CONFIRM. | |
809 | * Recover by retrying the request as per the discussion | |
810 | * on Page 181 of RFC3530. | |
811 | */ | |
812 | if (status == -NFS4ERR_BAD_STATEID) { | |
813 | exception.retry = 1; | |
814 | continue; | |
815 | } | |
1da177e4 LT |
816 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
817 | status, &exception)); | |
818 | } while (exception.retry); | |
819 | return res; | |
820 | } | |
821 | ||
822 | static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
823 | struct nfs_fh *fhandle, struct iattr *sattr, | |
824 | struct nfs4_state *state) | |
825 | { | |
826 | struct nfs_setattrargs arg = { | |
827 | .fh = fhandle, | |
828 | .iap = sattr, | |
829 | .server = server, | |
830 | .bitmask = server->attr_bitmask, | |
831 | }; | |
832 | struct nfs_setattrres res = { | |
833 | .fattr = fattr, | |
834 | .server = server, | |
835 | }; | |
836 | struct rpc_message msg = { | |
837 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
838 | .rpc_argp = &arg, | |
839 | .rpc_resp = &res, | |
840 | }; | |
65e4308d | 841 | int status; |
1da177e4 | 842 | |
0e574af1 | 843 | nfs_fattr_init(fattr); |
1da177e4 | 844 | |
08e9eac4 | 845 | if (state != NULL) { |
1da177e4 | 846 | msg.rpc_cred = state->owner->so_cred; |
08e9eac4 TM |
847 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
848 | } else | |
1da177e4 LT |
849 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
850 | ||
65e4308d TM |
851 | status = rpc_call_sync(server->client, &msg, 0); |
852 | return status; | |
1da177e4 LT |
853 | } |
854 | ||
855 | static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
856 | struct nfs_fh *fhandle, struct iattr *sattr, | |
857 | struct nfs4_state *state) | |
858 | { | |
859 | struct nfs4_exception exception = { }; | |
860 | int err; | |
861 | do { | |
862 | err = nfs4_handle_exception(server, | |
863 | _nfs4_do_setattr(server, fattr, fhandle, sattr, | |
864 | state), | |
865 | &exception); | |
866 | } while (exception.retry); | |
867 | return err; | |
868 | } | |
869 | ||
870 | struct nfs4_closedata { | |
871 | struct inode *inode; | |
872 | struct nfs4_state *state; | |
873 | struct nfs_closeargs arg; | |
874 | struct nfs_closeres res; | |
516a6af6 | 875 | struct nfs_fattr fattr; |
1da177e4 LT |
876 | }; |
877 | ||
963d8fe5 | 878 | static void nfs4_free_closedata(void *data) |
9512135d | 879 | { |
963d8fe5 TM |
880 | struct nfs4_closedata *calldata = data; |
881 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
882 | |
883 | nfs4_put_open_state(calldata->state); | |
884 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 885 | nfs4_put_state_owner(sp); |
9512135d TM |
886 | kfree(calldata); |
887 | } | |
888 | ||
963d8fe5 | 889 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 890 | { |
963d8fe5 | 891 | struct nfs4_closedata *calldata = data; |
1da177e4 | 892 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
893 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
894 | ||
4ce70ada TM |
895 | if (RPC_ASSASSINATED(task)) |
896 | return; | |
1da177e4 LT |
897 | /* hmm. we are done with the inode, and in the process of freeing |
898 | * the state_owner. we keep this around to process errors | |
899 | */ | |
cee54fc9 | 900 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
1da177e4 LT |
901 | switch (task->tk_status) { |
902 | case 0: | |
903 | memcpy(&state->stateid, &calldata->res.stateid, | |
904 | sizeof(state->stateid)); | |
905 | break; | |
906 | case -NFS4ERR_STALE_STATEID: | |
907 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
908 | nfs4_schedule_state_recovery(server->nfs4_state); |
909 | break; | |
910 | default: | |
911 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
912 | rpc_restart_call(task); | |
913 | return; | |
914 | } | |
915 | } | |
516a6af6 | 916 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
917 | } |
918 | ||
4ce70ada | 919 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 920 | { |
4ce70ada | 921 | struct nfs4_closedata *calldata = data; |
9512135d | 922 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
923 | struct rpc_message msg = { |
924 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
925 | .rpc_argp = &calldata->arg, | |
926 | .rpc_resp = &calldata->res, | |
9512135d | 927 | .rpc_cred = state->owner->so_cred, |
1da177e4 | 928 | }; |
4cecb76f | 929 | int mode = 0, old_mode; |
9512135d | 930 | |
963d8fe5 | 931 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 932 | return; |
9512135d TM |
933 | /* Recalculate the new open mode in case someone reopened the file |
934 | * while we were waiting in line to be scheduled. | |
935 | */ | |
4cecb76f TM |
936 | spin_lock(&state->owner->so_lock); |
937 | spin_lock(&calldata->inode->i_lock); | |
938 | mode = old_mode = state->state; | |
939 | if (state->nreaders == 0) | |
940 | mode &= ~FMODE_READ; | |
941 | if (state->nwriters == 0) | |
942 | mode &= ~FMODE_WRITE; | |
943 | nfs4_state_set_mode_locked(state, mode); | |
944 | spin_unlock(&calldata->inode->i_lock); | |
945 | spin_unlock(&state->owner->so_lock); | |
946 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
963d8fe5 TM |
947 | /* Note: exit _without_ calling nfs4_close_done */ |
948 | task->tk_action = NULL; | |
9512135d TM |
949 | return; |
950 | } | |
516a6af6 | 951 | nfs_fattr_init(calldata->res.fattr); |
9512135d | 952 | if (mode != 0) |
1da177e4 | 953 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
9512135d TM |
954 | calldata->arg.open_flags = mode; |
955 | rpc_call_setup(task, &msg, 0); | |
1da177e4 LT |
956 | } |
957 | ||
963d8fe5 | 958 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 959 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
960 | .rpc_call_done = nfs4_close_done, |
961 | .rpc_release = nfs4_free_closedata, | |
962 | }; | |
963 | ||
1da177e4 LT |
964 | /* |
965 | * It is possible for data to be read/written from a mem-mapped file | |
966 | * after the sys_close call (which hits the vfs layer as a flush). | |
967 | * This means that we can't safely call nfsv4 close on a file until | |
968 | * the inode is cleared. This in turn means that we are not good | |
969 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
970 | * share state even when we are done with one of the three share | |
971 | * stateid's in the inode. | |
972 | * | |
973 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
974 | */ | |
4cecb76f | 975 | int nfs4_do_close(struct inode *inode, struct nfs4_state *state) |
1da177e4 | 976 | { |
516a6af6 | 977 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 978 | struct nfs4_closedata *calldata; |
9512135d | 979 | int status = -ENOMEM; |
1da177e4 | 980 | |
9512135d | 981 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 982 | if (calldata == NULL) |
9512135d | 983 | goto out; |
1da177e4 LT |
984 | calldata->inode = inode; |
985 | calldata->state = state; | |
986 | calldata->arg.fh = NFS_FH(inode); | |
9512135d | 987 | calldata->arg.stateid = &state->stateid; |
1da177e4 | 988 | /* Serialization for the sequence id */ |
cee54fc9 | 989 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
990 | if (calldata->arg.seqid == NULL) |
991 | goto out_free_calldata; | |
516a6af6 TM |
992 | calldata->arg.bitmask = server->attr_bitmask; |
993 | calldata->res.fattr = &calldata->fattr; | |
994 | calldata->res.server = server; | |
9512135d | 995 | |
4ce70ada | 996 | status = nfs4_call_async(server->client, &nfs4_close_ops, calldata); |
9512135d TM |
997 | if (status == 0) |
998 | goto out; | |
999 | ||
1000 | nfs_free_seqid(calldata->arg.seqid); | |
1001 | out_free_calldata: | |
1002 | kfree(calldata); | |
1003 | out: | |
1004 | return status; | |
1da177e4 LT |
1005 | } |
1006 | ||
02a913a7 TM |
1007 | static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) |
1008 | { | |
1009 | struct file *filp; | |
1010 | ||
1011 | filp = lookup_instantiate_filp(nd, dentry, NULL); | |
1012 | if (!IS_ERR(filp)) { | |
1013 | struct nfs_open_context *ctx; | |
1014 | ctx = (struct nfs_open_context *)filp->private_data; | |
1015 | ctx->state = state; | |
1016 | } else | |
1017 | nfs4_close_state(state, nd->intent.open.flags); | |
1018 | } | |
1019 | ||
1020 | struct dentry * | |
1da177e4 LT |
1021 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1022 | { | |
1023 | struct iattr attr; | |
1024 | struct rpc_cred *cred; | |
1025 | struct nfs4_state *state; | |
02a913a7 | 1026 | struct dentry *res; |
1da177e4 LT |
1027 | |
1028 | if (nd->flags & LOOKUP_CREATE) { | |
1029 | attr.ia_mode = nd->intent.open.create_mode; | |
1030 | attr.ia_valid = ATTR_MODE; | |
1031 | if (!IS_POSIXACL(dir)) | |
1032 | attr.ia_mode &= ~current->fs->umask; | |
1033 | } else { | |
1034 | attr.ia_valid = 0; | |
1035 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1036 | } | |
1037 | ||
1038 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1039 | if (IS_ERR(cred)) | |
02a913a7 | 1040 | return (struct dentry *)cred; |
1da177e4 LT |
1041 | state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); |
1042 | put_rpccred(cred); | |
02a913a7 TM |
1043 | if (IS_ERR(state)) { |
1044 | if (PTR_ERR(state) == -ENOENT) | |
1045 | d_add(dentry, NULL); | |
1046 | return (struct dentry *)state; | |
1047 | } | |
1048 | res = d_add_unique(dentry, state->inode); | |
1049 | if (res != NULL) | |
1050 | dentry = res; | |
1051 | nfs4_intent_set_file(nd, dentry, state); | |
1052 | return res; | |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | int | |
02a913a7 | 1056 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 LT |
1057 | { |
1058 | struct rpc_cred *cred; | |
1059 | struct nfs4_state *state; | |
1060 | struct inode *inode; | |
1061 | ||
1062 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1063 | if (IS_ERR(cred)) | |
1064 | return PTR_ERR(cred); | |
1065 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
1066 | if (IS_ERR(state)) | |
1067 | state = nfs4_do_open(dir, dentry, openflags, NULL, cred); | |
1068 | put_rpccred(cred); | |
02a913a7 TM |
1069 | if (IS_ERR(state)) { |
1070 | switch (PTR_ERR(state)) { | |
1071 | case -EPERM: | |
1072 | case -EACCES: | |
1073 | case -EDQUOT: | |
1074 | case -ENOSPC: | |
1075 | case -EROFS: | |
1076 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1077 | return 1; | |
1078 | case -ENOENT: | |
1079 | if (dentry->d_inode == NULL) | |
1080 | return 1; | |
1081 | } | |
1082 | goto out_drop; | |
1083 | } | |
1da177e4 | 1084 | inode = state->inode; |
02a913a7 | 1085 | iput(inode); |
1da177e4 | 1086 | if (inode == dentry->d_inode) { |
02a913a7 | 1087 | nfs4_intent_set_file(nd, dentry, state); |
1da177e4 LT |
1088 | return 1; |
1089 | } | |
1da177e4 | 1090 | nfs4_close_state(state, openflags); |
02a913a7 TM |
1091 | out_drop: |
1092 | d_drop(dentry); | |
1da177e4 LT |
1093 | return 0; |
1094 | } | |
1095 | ||
1096 | ||
1097 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1098 | { | |
1099 | struct nfs4_server_caps_res res = {}; | |
1100 | struct rpc_message msg = { | |
1101 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1102 | .rpc_argp = fhandle, | |
1103 | .rpc_resp = &res, | |
1104 | }; | |
1105 | int status; | |
1106 | ||
1107 | status = rpc_call_sync(server->client, &msg, 0); | |
1108 | if (status == 0) { | |
1109 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1110 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1111 | server->caps |= NFS_CAP_ACLS; | |
1112 | if (res.has_links != 0) | |
1113 | server->caps |= NFS_CAP_HARDLINKS; | |
1114 | if (res.has_symlinks != 0) | |
1115 | server->caps |= NFS_CAP_SYMLINKS; | |
1116 | server->acl_bitmask = res.acl_bitmask; | |
1117 | } | |
1118 | return status; | |
1119 | } | |
1120 | ||
1121 | static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1122 | { | |
1123 | struct nfs4_exception exception = { }; | |
1124 | int err; | |
1125 | do { | |
1126 | err = nfs4_handle_exception(server, | |
1127 | _nfs4_server_capabilities(server, fhandle), | |
1128 | &exception); | |
1129 | } while (exception.retry); | |
1130 | return err; | |
1131 | } | |
1132 | ||
1133 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1134 | struct nfs_fsinfo *info) | |
1135 | { | |
1da177e4 LT |
1136 | struct nfs4_lookup_root_arg args = { |
1137 | .bitmask = nfs4_fattr_bitmap, | |
1138 | }; | |
1139 | struct nfs4_lookup_res res = { | |
1140 | .server = server, | |
0e574af1 | 1141 | .fattr = info->fattr, |
1da177e4 LT |
1142 | .fh = fhandle, |
1143 | }; | |
1144 | struct rpc_message msg = { | |
1145 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1146 | .rpc_argp = &args, | |
1147 | .rpc_resp = &res, | |
1148 | }; | |
0e574af1 | 1149 | nfs_fattr_init(info->fattr); |
1da177e4 LT |
1150 | return rpc_call_sync(server->client, &msg, 0); |
1151 | } | |
1152 | ||
1153 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1154 | struct nfs_fsinfo *info) | |
1155 | { | |
1156 | struct nfs4_exception exception = { }; | |
1157 | int err; | |
1158 | do { | |
1159 | err = nfs4_handle_exception(server, | |
1160 | _nfs4_lookup_root(server, fhandle, info), | |
1161 | &exception); | |
1162 | } while (exception.retry); | |
1163 | return err; | |
1164 | } | |
1165 | ||
1166 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1167 | struct nfs_fsinfo *info) | |
1168 | { | |
1169 | struct nfs_fattr * fattr = info->fattr; | |
1170 | unsigned char * p; | |
1171 | struct qstr q; | |
1172 | struct nfs4_lookup_arg args = { | |
1173 | .dir_fh = fhandle, | |
1174 | .name = &q, | |
1175 | .bitmask = nfs4_fattr_bitmap, | |
1176 | }; | |
1177 | struct nfs4_lookup_res res = { | |
1178 | .server = server, | |
1179 | .fattr = fattr, | |
1180 | .fh = fhandle, | |
1181 | }; | |
1182 | struct rpc_message msg = { | |
1183 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1184 | .rpc_argp = &args, | |
1185 | .rpc_resp = &res, | |
1186 | }; | |
1187 | int status; | |
1188 | ||
1189 | /* | |
1190 | * Now we do a separate LOOKUP for each component of the mount path. | |
1191 | * The LOOKUPs are done separately so that we can conveniently | |
1192 | * catch an ERR_WRONGSEC if it occurs along the way... | |
1193 | */ | |
1194 | status = nfs4_lookup_root(server, fhandle, info); | |
1195 | if (status) | |
1196 | goto out; | |
1197 | ||
1198 | p = server->mnt_path; | |
1199 | for (;;) { | |
1200 | struct nfs4_exception exception = { }; | |
1201 | ||
1202 | while (*p == '/') | |
1203 | p++; | |
1204 | if (!*p) | |
1205 | break; | |
1206 | q.name = p; | |
1207 | while (*p && (*p != '/')) | |
1208 | p++; | |
1209 | q.len = p - q.name; | |
1210 | ||
1211 | do { | |
0e574af1 | 1212 | nfs_fattr_init(fattr); |
1da177e4 LT |
1213 | status = nfs4_handle_exception(server, |
1214 | rpc_call_sync(server->client, &msg, 0), | |
1215 | &exception); | |
1216 | } while (exception.retry); | |
1217 | if (status == 0) | |
1218 | continue; | |
1219 | if (status == -ENOENT) { | |
1220 | printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); | |
1221 | printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); | |
1222 | } | |
1223 | break; | |
1224 | } | |
1225 | if (status == 0) | |
1226 | status = nfs4_server_capabilities(server, fhandle); | |
1227 | if (status == 0) | |
1228 | status = nfs4_do_fsinfo(server, fhandle, info); | |
1229 | out: | |
1230 | return status; | |
1231 | } | |
1232 | ||
1233 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1234 | { | |
1235 | struct nfs4_getattr_arg args = { | |
1236 | .fh = fhandle, | |
1237 | .bitmask = server->attr_bitmask, | |
1238 | }; | |
1239 | struct nfs4_getattr_res res = { | |
1240 | .fattr = fattr, | |
1241 | .server = server, | |
1242 | }; | |
1243 | struct rpc_message msg = { | |
1244 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1245 | .rpc_argp = &args, | |
1246 | .rpc_resp = &res, | |
1247 | }; | |
1248 | ||
0e574af1 | 1249 | nfs_fattr_init(fattr); |
1da177e4 LT |
1250 | return rpc_call_sync(server->client, &msg, 0); |
1251 | } | |
1252 | ||
1253 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1254 | { | |
1255 | struct nfs4_exception exception = { }; | |
1256 | int err; | |
1257 | do { | |
1258 | err = nfs4_handle_exception(server, | |
1259 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1260 | &exception); | |
1261 | } while (exception.retry); | |
1262 | return err; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * The file is not closed if it is opened due to the a request to change | |
1267 | * the size of the file. The open call will not be needed once the | |
1268 | * VFS layer lookup-intents are implemented. | |
1269 | * | |
1270 | * Close is called when the inode is destroyed. | |
1271 | * If we haven't opened the file for O_WRONLY, we | |
1272 | * need to in the size_change case to obtain a stateid. | |
1273 | * | |
1274 | * Got race? | |
1275 | * Because OPEN is always done by name in nfsv4, it is | |
1276 | * possible that we opened a different file by the same | |
1277 | * name. We can recognize this race condition, but we | |
1278 | * can't do anything about it besides returning an error. | |
1279 | * | |
1280 | * This will be fixed with VFS changes (lookup-intent). | |
1281 | */ | |
1282 | static int | |
1283 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1284 | struct iattr *sattr) | |
1285 | { | |
08e9eac4 TM |
1286 | struct rpc_cred *cred; |
1287 | struct inode *inode = dentry->d_inode; | |
d530838b TM |
1288 | struct nfs_open_context *ctx; |
1289 | struct nfs4_state *state = NULL; | |
1da177e4 LT |
1290 | int status; |
1291 | ||
0e574af1 | 1292 | nfs_fattr_init(fattr); |
1da177e4 | 1293 | |
08e9eac4 TM |
1294 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); |
1295 | if (IS_ERR(cred)) | |
1296 | return PTR_ERR(cred); | |
d530838b TM |
1297 | |
1298 | /* Search for an existing open(O_WRITE) file */ | |
1299 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); | |
1300 | if (ctx != NULL) | |
1301 | state = ctx->state; | |
08e9eac4 | 1302 | |
1da177e4 LT |
1303 | status = nfs4_do_setattr(NFS_SERVER(inode), fattr, |
1304 | NFS_FH(inode), sattr, state); | |
65e4308d TM |
1305 | if (status == 0) |
1306 | nfs_setattr_update_inode(inode, sattr); | |
d530838b TM |
1307 | if (ctx != NULL) |
1308 | put_nfs_open_context(ctx); | |
08e9eac4 | 1309 | put_rpccred(cred); |
1da177e4 LT |
1310 | return status; |
1311 | } | |
1312 | ||
1313 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
1314 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1315 | { | |
1316 | int status; | |
1317 | struct nfs_server *server = NFS_SERVER(dir); | |
1318 | struct nfs4_lookup_arg args = { | |
1319 | .bitmask = server->attr_bitmask, | |
1320 | .dir_fh = NFS_FH(dir), | |
1321 | .name = name, | |
1322 | }; | |
1323 | struct nfs4_lookup_res res = { | |
1324 | .server = server, | |
1325 | .fattr = fattr, | |
1326 | .fh = fhandle, | |
1327 | }; | |
1328 | struct rpc_message msg = { | |
1329 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1330 | .rpc_argp = &args, | |
1331 | .rpc_resp = &res, | |
1332 | }; | |
1333 | ||
0e574af1 | 1334 | nfs_fattr_init(fattr); |
1da177e4 LT |
1335 | |
1336 | dprintk("NFS call lookup %s\n", name->name); | |
1337 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1338 | dprintk("NFS reply lookup: %d\n", status); | |
1339 | return status; | |
1340 | } | |
1341 | ||
1342 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1343 | { | |
1344 | struct nfs4_exception exception = { }; | |
1345 | int err; | |
1346 | do { | |
1347 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1348 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1349 | &exception); | |
1350 | } while (exception.retry); | |
1351 | return err; | |
1352 | } | |
1353 | ||
1354 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1355 | { | |
1356 | struct nfs4_accessargs args = { | |
1357 | .fh = NFS_FH(inode), | |
1358 | }; | |
1359 | struct nfs4_accessres res = { 0 }; | |
1360 | struct rpc_message msg = { | |
1361 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1362 | .rpc_argp = &args, | |
1363 | .rpc_resp = &res, | |
1364 | .rpc_cred = entry->cred, | |
1365 | }; | |
1366 | int mode = entry->mask; | |
1367 | int status; | |
1368 | ||
1369 | /* | |
1370 | * Determine which access bits we want to ask for... | |
1371 | */ | |
1372 | if (mode & MAY_READ) | |
1373 | args.access |= NFS4_ACCESS_READ; | |
1374 | if (S_ISDIR(inode->i_mode)) { | |
1375 | if (mode & MAY_WRITE) | |
1376 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1377 | if (mode & MAY_EXEC) | |
1378 | args.access |= NFS4_ACCESS_LOOKUP; | |
1379 | } else { | |
1380 | if (mode & MAY_WRITE) | |
1381 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1382 | if (mode & MAY_EXEC) | |
1383 | args.access |= NFS4_ACCESS_EXECUTE; | |
1384 | } | |
1385 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1386 | if (!status) { | |
1387 | entry->mask = 0; | |
1388 | if (res.access & NFS4_ACCESS_READ) | |
1389 | entry->mask |= MAY_READ; | |
1390 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1391 | entry->mask |= MAY_WRITE; | |
1392 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1393 | entry->mask |= MAY_EXEC; | |
1394 | } | |
1395 | return status; | |
1396 | } | |
1397 | ||
1398 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1399 | { | |
1400 | struct nfs4_exception exception = { }; | |
1401 | int err; | |
1402 | do { | |
1403 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1404 | _nfs4_proc_access(inode, entry), | |
1405 | &exception); | |
1406 | } while (exception.retry); | |
1407 | return err; | |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * TODO: For the time being, we don't try to get any attributes | |
1412 | * along with any of the zero-copy operations READ, READDIR, | |
1413 | * READLINK, WRITE. | |
1414 | * | |
1415 | * In the case of the first three, we want to put the GETATTR | |
1416 | * after the read-type operation -- this is because it is hard | |
1417 | * to predict the length of a GETATTR response in v4, and thus | |
1418 | * align the READ data correctly. This means that the GETATTR | |
1419 | * may end up partially falling into the page cache, and we should | |
1420 | * shift it into the 'tail' of the xdr_buf before processing. | |
1421 | * To do this efficiently, we need to know the total length | |
1422 | * of data received, which doesn't seem to be available outside | |
1423 | * of the RPC layer. | |
1424 | * | |
1425 | * In the case of WRITE, we also want to put the GETATTR after | |
1426 | * the operation -- in this case because we want to make sure | |
1427 | * we get the post-operation mtime and size. This means that | |
1428 | * we can't use xdr_encode_pages() as written: we need a variant | |
1429 | * of it which would leave room in the 'tail' iovec. | |
1430 | * | |
1431 | * Both of these changes to the XDR layer would in fact be quite | |
1432 | * minor, but I decided to leave them for a subsequent patch. | |
1433 | */ | |
1434 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1435 | unsigned int pgbase, unsigned int pglen) | |
1436 | { | |
1437 | struct nfs4_readlink args = { | |
1438 | .fh = NFS_FH(inode), | |
1439 | .pgbase = pgbase, | |
1440 | .pglen = pglen, | |
1441 | .pages = &page, | |
1442 | }; | |
1443 | struct rpc_message msg = { | |
1444 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1445 | .rpc_argp = &args, | |
1446 | .rpc_resp = NULL, | |
1447 | }; | |
1448 | ||
1449 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1450 | } | |
1451 | ||
1452 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1453 | unsigned int pgbase, unsigned int pglen) | |
1454 | { | |
1455 | struct nfs4_exception exception = { }; | |
1456 | int err; | |
1457 | do { | |
1458 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1459 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1460 | &exception); | |
1461 | } while (exception.retry); | |
1462 | return err; | |
1463 | } | |
1464 | ||
1465 | static int _nfs4_proc_read(struct nfs_read_data *rdata) | |
1466 | { | |
1467 | int flags = rdata->flags; | |
1468 | struct inode *inode = rdata->inode; | |
1469 | struct nfs_fattr *fattr = rdata->res.fattr; | |
1470 | struct nfs_server *server = NFS_SERVER(inode); | |
1471 | struct rpc_message msg = { | |
1472 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
1473 | .rpc_argp = &rdata->args, | |
1474 | .rpc_resp = &rdata->res, | |
1475 | .rpc_cred = rdata->cred, | |
1476 | }; | |
1477 | unsigned long timestamp = jiffies; | |
1478 | int status; | |
1479 | ||
1480 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, | |
1481 | (long long) rdata->args.offset); | |
1482 | ||
0e574af1 | 1483 | nfs_fattr_init(fattr); |
1da177e4 LT |
1484 | status = rpc_call_sync(server->client, &msg, flags); |
1485 | if (!status) | |
1486 | renew_lease(server, timestamp); | |
1487 | dprintk("NFS reply read: %d\n", status); | |
1488 | return status; | |
1489 | } | |
1490 | ||
1491 | static int nfs4_proc_read(struct nfs_read_data *rdata) | |
1492 | { | |
1493 | struct nfs4_exception exception = { }; | |
1494 | int err; | |
1495 | do { | |
1496 | err = nfs4_handle_exception(NFS_SERVER(rdata->inode), | |
1497 | _nfs4_proc_read(rdata), | |
1498 | &exception); | |
1499 | } while (exception.retry); | |
1500 | return err; | |
1501 | } | |
1502 | ||
1503 | static int _nfs4_proc_write(struct nfs_write_data *wdata) | |
1504 | { | |
1505 | int rpcflags = wdata->flags; | |
1506 | struct inode *inode = wdata->inode; | |
1507 | struct nfs_fattr *fattr = wdata->res.fattr; | |
1508 | struct nfs_server *server = NFS_SERVER(inode); | |
1509 | struct rpc_message msg = { | |
1510 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
1511 | .rpc_argp = &wdata->args, | |
1512 | .rpc_resp = &wdata->res, | |
1513 | .rpc_cred = wdata->cred, | |
1514 | }; | |
1515 | int status; | |
1516 | ||
1517 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, | |
1518 | (long long) wdata->args.offset); | |
1519 | ||
3b6efee9 TM |
1520 | wdata->args.bitmask = server->attr_bitmask; |
1521 | wdata->res.server = server; | |
0e574af1 | 1522 | nfs_fattr_init(fattr); |
1da177e4 LT |
1523 | status = rpc_call_sync(server->client, &msg, rpcflags); |
1524 | dprintk("NFS reply write: %d\n", status); | |
3b6efee9 TM |
1525 | if (status < 0) |
1526 | return status; | |
1527 | nfs_post_op_update_inode(inode, fattr); | |
1528 | return wdata->res.count; | |
1da177e4 LT |
1529 | } |
1530 | ||
1531 | static int nfs4_proc_write(struct nfs_write_data *wdata) | |
1532 | { | |
1533 | struct nfs4_exception exception = { }; | |
1534 | int err; | |
1535 | do { | |
1536 | err = nfs4_handle_exception(NFS_SERVER(wdata->inode), | |
1537 | _nfs4_proc_write(wdata), | |
1538 | &exception); | |
1539 | } while (exception.retry); | |
1540 | return err; | |
1541 | } | |
1542 | ||
1543 | static int _nfs4_proc_commit(struct nfs_write_data *cdata) | |
1544 | { | |
1545 | struct inode *inode = cdata->inode; | |
1546 | struct nfs_fattr *fattr = cdata->res.fattr; | |
1547 | struct nfs_server *server = NFS_SERVER(inode); | |
1548 | struct rpc_message msg = { | |
1549 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
1550 | .rpc_argp = &cdata->args, | |
1551 | .rpc_resp = &cdata->res, | |
1552 | .rpc_cred = cdata->cred, | |
1553 | }; | |
1554 | int status; | |
1555 | ||
1556 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, | |
1557 | (long long) cdata->args.offset); | |
1558 | ||
3b6efee9 TM |
1559 | cdata->args.bitmask = server->attr_bitmask; |
1560 | cdata->res.server = server; | |
0e574af1 | 1561 | nfs_fattr_init(fattr); |
1da177e4 LT |
1562 | status = rpc_call_sync(server->client, &msg, 0); |
1563 | dprintk("NFS reply commit: %d\n", status); | |
3b6efee9 TM |
1564 | if (status >= 0) |
1565 | nfs_post_op_update_inode(inode, fattr); | |
1da177e4 LT |
1566 | return status; |
1567 | } | |
1568 | ||
1569 | static int nfs4_proc_commit(struct nfs_write_data *cdata) | |
1570 | { | |
1571 | struct nfs4_exception exception = { }; | |
1572 | int err; | |
1573 | do { | |
1574 | err = nfs4_handle_exception(NFS_SERVER(cdata->inode), | |
1575 | _nfs4_proc_commit(cdata), | |
1576 | &exception); | |
1577 | } while (exception.retry); | |
1578 | return err; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * Got race? | |
1583 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1584 | * Until then, this create/open method is prone to inefficiency and race | |
1585 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1586 | * placed on the wire. | |
1587 | * | |
1588 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1589 | * The file will be opened again in the subsequent VFS open call | |
1590 | * (nfs4_proc_file_open). | |
1591 | * | |
1592 | * The open for read will just hang around to be used by any process that | |
1593 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1594 | */ | |
1595 | ||
1596 | static int | |
1597 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 1598 | int flags, struct nameidata *nd) |
1da177e4 LT |
1599 | { |
1600 | struct nfs4_state *state; | |
1601 | struct rpc_cred *cred; | |
1602 | int status = 0; | |
1603 | ||
1604 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1605 | if (IS_ERR(cred)) { | |
1606 | status = PTR_ERR(cred); | |
1607 | goto out; | |
1608 | } | |
1609 | state = nfs4_do_open(dir, dentry, flags, sattr, cred); | |
1610 | put_rpccred(cred); | |
1611 | if (IS_ERR(state)) { | |
1612 | status = PTR_ERR(state); | |
1613 | goto out; | |
1614 | } | |
1615 | d_instantiate(dentry, state->inode); | |
1616 | if (flags & O_EXCL) { | |
1617 | struct nfs_fattr fattr; | |
1618 | status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, | |
1619 | NFS_FH(state->inode), sattr, state); | |
02a913a7 | 1620 | if (status == 0) |
65e4308d | 1621 | nfs_setattr_update_inode(state->inode, sattr); |
02a913a7 TM |
1622 | } |
1623 | if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) | |
1624 | nfs4_intent_set_file(nd, dentry, state); | |
1625 | else | |
1626 | nfs4_close_state(state, flags); | |
1da177e4 LT |
1627 | out: |
1628 | return status; | |
1629 | } | |
1630 | ||
1631 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1632 | { | |
16e42959 | 1633 | struct nfs_server *server = NFS_SERVER(dir); |
1da177e4 LT |
1634 | struct nfs4_remove_arg args = { |
1635 | .fh = NFS_FH(dir), | |
1636 | .name = name, | |
16e42959 TM |
1637 | .bitmask = server->attr_bitmask, |
1638 | }; | |
1639 | struct nfs_fattr dir_attr; | |
1640 | struct nfs4_remove_res res = { | |
1641 | .server = server, | |
1642 | .dir_attr = &dir_attr, | |
1da177e4 | 1643 | }; |
1da177e4 LT |
1644 | struct rpc_message msg = { |
1645 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1646 | .rpc_argp = &args, | |
1647 | .rpc_resp = &res, | |
1648 | }; | |
1649 | int status; | |
1650 | ||
16e42959 TM |
1651 | nfs_fattr_init(res.dir_attr); |
1652 | status = rpc_call_sync(server->client, &msg, 0); | |
1653 | if (status == 0) { | |
1654 | update_changeattr(dir, &res.cinfo); | |
1655 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1656 | } | |
1da177e4 LT |
1657 | return status; |
1658 | } | |
1659 | ||
1660 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1661 | { | |
1662 | struct nfs4_exception exception = { }; | |
1663 | int err; | |
1664 | do { | |
1665 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1666 | _nfs4_proc_remove(dir, name), | |
1667 | &exception); | |
1668 | } while (exception.retry); | |
1669 | return err; | |
1670 | } | |
1671 | ||
1672 | struct unlink_desc { | |
1673 | struct nfs4_remove_arg args; | |
16e42959 TM |
1674 | struct nfs4_remove_res res; |
1675 | struct nfs_fattr dir_attr; | |
1da177e4 LT |
1676 | }; |
1677 | ||
1678 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1679 | struct qstr *name) | |
1680 | { | |
16e42959 | 1681 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
1da177e4 LT |
1682 | struct unlink_desc *up; |
1683 | ||
1684 | up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); | |
1685 | if (!up) | |
1686 | return -ENOMEM; | |
1687 | ||
1688 | up->args.fh = NFS_FH(dir->d_inode); | |
1689 | up->args.name = name; | |
16e42959 TM |
1690 | up->args.bitmask = server->attr_bitmask; |
1691 | up->res.server = server; | |
1692 | up->res.dir_attr = &up->dir_attr; | |
1da177e4 LT |
1693 | |
1694 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1695 | msg->rpc_argp = &up->args; | |
1696 | msg->rpc_resp = &up->res; | |
1697 | return 0; | |
1698 | } | |
1699 | ||
1700 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1701 | { | |
1702 | struct rpc_message *msg = &task->tk_msg; | |
1703 | struct unlink_desc *up; | |
1704 | ||
1705 | if (msg->rpc_resp != NULL) { | |
1706 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
16e42959 TM |
1707 | update_changeattr(dir->d_inode, &up->res.cinfo); |
1708 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); | |
1da177e4 LT |
1709 | kfree(up); |
1710 | msg->rpc_resp = NULL; | |
1711 | msg->rpc_argp = NULL; | |
1712 | } | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1717 | struct inode *new_dir, struct qstr *new_name) | |
1718 | { | |
6caf2c82 | 1719 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
1720 | struct nfs4_rename_arg arg = { |
1721 | .old_dir = NFS_FH(old_dir), | |
1722 | .new_dir = NFS_FH(new_dir), | |
1723 | .old_name = old_name, | |
1724 | .new_name = new_name, | |
6caf2c82 TM |
1725 | .bitmask = server->attr_bitmask, |
1726 | }; | |
1727 | struct nfs_fattr old_fattr, new_fattr; | |
1728 | struct nfs4_rename_res res = { | |
1729 | .server = server, | |
1730 | .old_fattr = &old_fattr, | |
1731 | .new_fattr = &new_fattr, | |
1da177e4 | 1732 | }; |
1da177e4 LT |
1733 | struct rpc_message msg = { |
1734 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
1735 | .rpc_argp = &arg, | |
1736 | .rpc_resp = &res, | |
1737 | }; | |
1738 | int status; | |
1739 | ||
6caf2c82 TM |
1740 | nfs_fattr_init(res.old_fattr); |
1741 | nfs_fattr_init(res.new_fattr); | |
1742 | status = rpc_call_sync(server->client, &msg, 0); | |
1da177e4 LT |
1743 | |
1744 | if (!status) { | |
1745 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 1746 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 1747 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 1748 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
1749 | } |
1750 | return status; | |
1751 | } | |
1752 | ||
1753 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1754 | struct inode *new_dir, struct qstr *new_name) | |
1755 | { | |
1756 | struct nfs4_exception exception = { }; | |
1757 | int err; | |
1758 | do { | |
1759 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
1760 | _nfs4_proc_rename(old_dir, old_name, | |
1761 | new_dir, new_name), | |
1762 | &exception); | |
1763 | } while (exception.retry); | |
1764 | return err; | |
1765 | } | |
1766 | ||
1767 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1768 | { | |
91ba2eee | 1769 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1770 | struct nfs4_link_arg arg = { |
1771 | .fh = NFS_FH(inode), | |
1772 | .dir_fh = NFS_FH(dir), | |
1773 | .name = name, | |
91ba2eee TM |
1774 | .bitmask = server->attr_bitmask, |
1775 | }; | |
1776 | struct nfs_fattr fattr, dir_attr; | |
1777 | struct nfs4_link_res res = { | |
1778 | .server = server, | |
1779 | .fattr = &fattr, | |
1780 | .dir_attr = &dir_attr, | |
1da177e4 | 1781 | }; |
1da177e4 LT |
1782 | struct rpc_message msg = { |
1783 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
1784 | .rpc_argp = &arg, | |
91ba2eee | 1785 | .rpc_resp = &res, |
1da177e4 LT |
1786 | }; |
1787 | int status; | |
1788 | ||
91ba2eee TM |
1789 | nfs_fattr_init(res.fattr); |
1790 | nfs_fattr_init(res.dir_attr); | |
1791 | status = rpc_call_sync(server->client, &msg, 0); | |
1792 | if (!status) { | |
1793 | update_changeattr(dir, &res.cinfo); | |
1794 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1795 | nfs_refresh_inode(inode, res.fattr); | |
1796 | } | |
1da177e4 LT |
1797 | |
1798 | return status; | |
1799 | } | |
1800 | ||
1801 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1802 | { | |
1803 | struct nfs4_exception exception = { }; | |
1804 | int err; | |
1805 | do { | |
1806 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1807 | _nfs4_proc_link(inode, dir, name), | |
1808 | &exception); | |
1809 | } while (exception.retry); | |
1810 | return err; | |
1811 | } | |
1812 | ||
1813 | static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
1814 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
1815 | struct nfs_fattr *fattr) | |
1816 | { | |
1817 | struct nfs_server *server = NFS_SERVER(dir); | |
56ae19f3 | 1818 | struct nfs_fattr dir_fattr; |
1da177e4 LT |
1819 | struct nfs4_create_arg arg = { |
1820 | .dir_fh = NFS_FH(dir), | |
1821 | .server = server, | |
1822 | .name = name, | |
1823 | .attrs = sattr, | |
1824 | .ftype = NF4LNK, | |
1825 | .bitmask = server->attr_bitmask, | |
1826 | }; | |
1827 | struct nfs4_create_res res = { | |
1828 | .server = server, | |
1829 | .fh = fhandle, | |
1830 | .fattr = fattr, | |
56ae19f3 | 1831 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
1832 | }; |
1833 | struct rpc_message msg = { | |
1834 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
1835 | .rpc_argp = &arg, | |
1836 | .rpc_resp = &res, | |
1837 | }; | |
1838 | int status; | |
1839 | ||
1840 | if (path->len > NFS4_MAXPATHLEN) | |
1841 | return -ENAMETOOLONG; | |
1842 | arg.u.symlink = path; | |
0e574af1 | 1843 | nfs_fattr_init(fattr); |
56ae19f3 | 1844 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
1845 | |
1846 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1847 | if (!status) | |
1848 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 1849 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
1850 | return status; |
1851 | } | |
1852 | ||
1853 | static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
1854 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
1855 | struct nfs_fattr *fattr) | |
1856 | { | |
1857 | struct nfs4_exception exception = { }; | |
1858 | int err; | |
1859 | do { | |
1860 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1861 | _nfs4_proc_symlink(dir, name, path, sattr, | |
1862 | fhandle, fattr), | |
1863 | &exception); | |
1864 | } while (exception.retry); | |
1865 | return err; | |
1866 | } | |
1867 | ||
1868 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
1869 | struct iattr *sattr) | |
1870 | { | |
1871 | struct nfs_server *server = NFS_SERVER(dir); | |
1872 | struct nfs_fh fhandle; | |
56ae19f3 | 1873 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
1874 | struct nfs4_create_arg arg = { |
1875 | .dir_fh = NFS_FH(dir), | |
1876 | .server = server, | |
1877 | .name = &dentry->d_name, | |
1878 | .attrs = sattr, | |
1879 | .ftype = NF4DIR, | |
1880 | .bitmask = server->attr_bitmask, | |
1881 | }; | |
1882 | struct nfs4_create_res res = { | |
1883 | .server = server, | |
1884 | .fh = &fhandle, | |
1885 | .fattr = &fattr, | |
56ae19f3 | 1886 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
1887 | }; |
1888 | struct rpc_message msg = { | |
1889 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
1890 | .rpc_argp = &arg, | |
1891 | .rpc_resp = &res, | |
1892 | }; | |
1893 | int status; | |
1894 | ||
0e574af1 | 1895 | nfs_fattr_init(&fattr); |
56ae19f3 | 1896 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
1897 | |
1898 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1899 | if (!status) { | |
1900 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 1901 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
1902 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
1903 | } | |
1904 | return status; | |
1905 | } | |
1906 | ||
1907 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
1908 | struct iattr *sattr) | |
1909 | { | |
1910 | struct nfs4_exception exception = { }; | |
1911 | int err; | |
1912 | do { | |
1913 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1914 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
1915 | &exception); | |
1916 | } while (exception.retry); | |
1917 | return err; | |
1918 | } | |
1919 | ||
1920 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
1921 | u64 cookie, struct page *page, unsigned int count, int plus) | |
1922 | { | |
1923 | struct inode *dir = dentry->d_inode; | |
1924 | struct nfs4_readdir_arg args = { | |
1925 | .fh = NFS_FH(dir), | |
1926 | .pages = &page, | |
1927 | .pgbase = 0, | |
1928 | .count = count, | |
1929 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
1930 | }; | |
1931 | struct nfs4_readdir_res res; | |
1932 | struct rpc_message msg = { | |
1933 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
1934 | .rpc_argp = &args, | |
1935 | .rpc_resp = &res, | |
1936 | .rpc_cred = cred, | |
1937 | }; | |
1938 | int status; | |
1939 | ||
eadf4598 TM |
1940 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
1941 | dentry->d_parent->d_name.name, | |
1942 | dentry->d_name.name, | |
1943 | (unsigned long long)cookie); | |
1da177e4 LT |
1944 | lock_kernel(); |
1945 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
1946 | res.pgbase = args.pgbase; | |
1947 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1948 | if (status == 0) | |
1949 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
1950 | unlock_kernel(); | |
eadf4598 | 1951 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
1da177e4 LT |
1952 | return status; |
1953 | } | |
1954 | ||
1955 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
1956 | u64 cookie, struct page *page, unsigned int count, int plus) | |
1957 | { | |
1958 | struct nfs4_exception exception = { }; | |
1959 | int err; | |
1960 | do { | |
1961 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
1962 | _nfs4_proc_readdir(dentry, cred, cookie, | |
1963 | page, count, plus), | |
1964 | &exception); | |
1965 | } while (exception.retry); | |
1966 | return err; | |
1967 | } | |
1968 | ||
1969 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
1970 | struct iattr *sattr, dev_t rdev) | |
1971 | { | |
1972 | struct nfs_server *server = NFS_SERVER(dir); | |
1973 | struct nfs_fh fh; | |
56ae19f3 | 1974 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
1975 | struct nfs4_create_arg arg = { |
1976 | .dir_fh = NFS_FH(dir), | |
1977 | .server = server, | |
1978 | .name = &dentry->d_name, | |
1979 | .attrs = sattr, | |
1980 | .bitmask = server->attr_bitmask, | |
1981 | }; | |
1982 | struct nfs4_create_res res = { | |
1983 | .server = server, | |
1984 | .fh = &fh, | |
1985 | .fattr = &fattr, | |
56ae19f3 | 1986 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
1987 | }; |
1988 | struct rpc_message msg = { | |
1989 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
1990 | .rpc_argp = &arg, | |
1991 | .rpc_resp = &res, | |
1992 | }; | |
1993 | int status; | |
1994 | int mode = sattr->ia_mode; | |
1995 | ||
0e574af1 | 1996 | nfs_fattr_init(&fattr); |
56ae19f3 | 1997 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
1998 | |
1999 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2000 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2001 | if (S_ISFIFO(mode)) | |
2002 | arg.ftype = NF4FIFO; | |
2003 | else if (S_ISBLK(mode)) { | |
2004 | arg.ftype = NF4BLK; | |
2005 | arg.u.device.specdata1 = MAJOR(rdev); | |
2006 | arg.u.device.specdata2 = MINOR(rdev); | |
2007 | } | |
2008 | else if (S_ISCHR(mode)) { | |
2009 | arg.ftype = NF4CHR; | |
2010 | arg.u.device.specdata1 = MAJOR(rdev); | |
2011 | arg.u.device.specdata2 = MINOR(rdev); | |
2012 | } | |
2013 | else | |
2014 | arg.ftype = NF4SOCK; | |
2015 | ||
2016 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2017 | if (status == 0) { | |
2018 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2019 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2020 | status = nfs_instantiate(dentry, &fh, &fattr); |
2021 | } | |
2022 | return status; | |
2023 | } | |
2024 | ||
2025 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2026 | struct iattr *sattr, dev_t rdev) | |
2027 | { | |
2028 | struct nfs4_exception exception = { }; | |
2029 | int err; | |
2030 | do { | |
2031 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2032 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2033 | &exception); | |
2034 | } while (exception.retry); | |
2035 | return err; | |
2036 | } | |
2037 | ||
2038 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2039 | struct nfs_fsstat *fsstat) | |
2040 | { | |
2041 | struct nfs4_statfs_arg args = { | |
2042 | .fh = fhandle, | |
2043 | .bitmask = server->attr_bitmask, | |
2044 | }; | |
2045 | struct rpc_message msg = { | |
2046 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2047 | .rpc_argp = &args, | |
2048 | .rpc_resp = fsstat, | |
2049 | }; | |
2050 | ||
0e574af1 | 2051 | nfs_fattr_init(fsstat->fattr); |
1da177e4 LT |
2052 | return rpc_call_sync(server->client, &msg, 0); |
2053 | } | |
2054 | ||
2055 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2056 | { | |
2057 | struct nfs4_exception exception = { }; | |
2058 | int err; | |
2059 | do { | |
2060 | err = nfs4_handle_exception(server, | |
2061 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2062 | &exception); | |
2063 | } while (exception.retry); | |
2064 | return err; | |
2065 | } | |
2066 | ||
2067 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2068 | struct nfs_fsinfo *fsinfo) | |
2069 | { | |
2070 | struct nfs4_fsinfo_arg args = { | |
2071 | .fh = fhandle, | |
2072 | .bitmask = server->attr_bitmask, | |
2073 | }; | |
2074 | struct rpc_message msg = { | |
2075 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2076 | .rpc_argp = &args, | |
2077 | .rpc_resp = fsinfo, | |
2078 | }; | |
2079 | ||
2080 | return rpc_call_sync(server->client, &msg, 0); | |
2081 | } | |
2082 | ||
2083 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2084 | { | |
2085 | struct nfs4_exception exception = { }; | |
2086 | int err; | |
2087 | ||
2088 | do { | |
2089 | err = nfs4_handle_exception(server, | |
2090 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2091 | &exception); | |
2092 | } while (exception.retry); | |
2093 | return err; | |
2094 | } | |
2095 | ||
2096 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2097 | { | |
0e574af1 | 2098 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2099 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2100 | } | |
2101 | ||
2102 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2103 | struct nfs_pathconf *pathconf) | |
2104 | { | |
2105 | struct nfs4_pathconf_arg args = { | |
2106 | .fh = fhandle, | |
2107 | .bitmask = server->attr_bitmask, | |
2108 | }; | |
2109 | struct rpc_message msg = { | |
2110 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2111 | .rpc_argp = &args, | |
2112 | .rpc_resp = pathconf, | |
2113 | }; | |
2114 | ||
2115 | /* None of the pathconf attributes are mandatory to implement */ | |
2116 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2117 | memset(pathconf, 0, sizeof(*pathconf)); | |
2118 | return 0; | |
2119 | } | |
2120 | ||
0e574af1 | 2121 | nfs_fattr_init(pathconf->fattr); |
1da177e4 LT |
2122 | return rpc_call_sync(server->client, &msg, 0); |
2123 | } | |
2124 | ||
2125 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2126 | struct nfs_pathconf *pathconf) | |
2127 | { | |
2128 | struct nfs4_exception exception = { }; | |
2129 | int err; | |
2130 | ||
2131 | do { | |
2132 | err = nfs4_handle_exception(server, | |
2133 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2134 | &exception); | |
2135 | } while (exception.retry); | |
2136 | return err; | |
2137 | } | |
2138 | ||
963d8fe5 | 2139 | static void nfs4_read_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2140 | { |
963d8fe5 | 2141 | struct nfs_read_data *data = calldata; |
1da177e4 LT |
2142 | struct inode *inode = data->inode; |
2143 | ||
2144 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2145 | rpc_restart_call(task); | |
2146 | return; | |
2147 | } | |
2148 | if (task->tk_status > 0) | |
2149 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2150 | /* Call back common NFS readpage processing */ | |
963d8fe5 | 2151 | nfs_readpage_result(task, calldata); |
1da177e4 LT |
2152 | } |
2153 | ||
963d8fe5 TM |
2154 | static const struct rpc_call_ops nfs4_read_ops = { |
2155 | .rpc_call_done = nfs4_read_done, | |
2156 | .rpc_release = nfs_readdata_release, | |
2157 | }; | |
2158 | ||
1da177e4 LT |
2159 | static void |
2160 | nfs4_proc_read_setup(struct nfs_read_data *data) | |
2161 | { | |
2162 | struct rpc_task *task = &data->task; | |
2163 | struct rpc_message msg = { | |
2164 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2165 | .rpc_argp = &data->args, | |
2166 | .rpc_resp = &data->res, | |
2167 | .rpc_cred = data->cred, | |
2168 | }; | |
2169 | struct inode *inode = data->inode; | |
2170 | int flags; | |
2171 | ||
2172 | data->timestamp = jiffies; | |
2173 | ||
2174 | /* N.B. Do we need to test? Never called for swapfile inode */ | |
2175 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); | |
2176 | ||
2177 | /* Finalize the task. */ | |
963d8fe5 | 2178 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data); |
1da177e4 LT |
2179 | rpc_call_setup(task, &msg, 0); |
2180 | } | |
2181 | ||
963d8fe5 | 2182 | static void nfs4_write_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2183 | { |
963d8fe5 | 2184 | struct nfs_write_data *data = calldata; |
1da177e4 LT |
2185 | struct inode *inode = data->inode; |
2186 | ||
2187 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2188 | rpc_restart_call(task); | |
2189 | return; | |
2190 | } | |
4f9838c7 | 2191 | if (task->tk_status >= 0) { |
1da177e4 | 2192 | renew_lease(NFS_SERVER(inode), data->timestamp); |
4f9838c7 TM |
2193 | nfs_post_op_update_inode(inode, data->res.fattr); |
2194 | } | |
1da177e4 | 2195 | /* Call back common NFS writeback processing */ |
963d8fe5 | 2196 | nfs_writeback_done(task, calldata); |
1da177e4 LT |
2197 | } |
2198 | ||
963d8fe5 TM |
2199 | static const struct rpc_call_ops nfs4_write_ops = { |
2200 | .rpc_call_done = nfs4_write_done, | |
2201 | .rpc_release = nfs_writedata_release, | |
2202 | }; | |
2203 | ||
1da177e4 LT |
2204 | static void |
2205 | nfs4_proc_write_setup(struct nfs_write_data *data, int how) | |
2206 | { | |
2207 | struct rpc_task *task = &data->task; | |
2208 | struct rpc_message msg = { | |
2209 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2210 | .rpc_argp = &data->args, | |
2211 | .rpc_resp = &data->res, | |
2212 | .rpc_cred = data->cred, | |
2213 | }; | |
2214 | struct inode *inode = data->inode; | |
4f9838c7 | 2215 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2216 | int stable; |
2217 | int flags; | |
2218 | ||
2219 | if (how & FLUSH_STABLE) { | |
2220 | if (!NFS_I(inode)->ncommit) | |
2221 | stable = NFS_FILE_SYNC; | |
2222 | else | |
2223 | stable = NFS_DATA_SYNC; | |
2224 | } else | |
2225 | stable = NFS_UNSTABLE; | |
2226 | data->args.stable = stable; | |
4f9838c7 TM |
2227 | data->args.bitmask = server->attr_bitmask; |
2228 | data->res.server = server; | |
1da177e4 LT |
2229 | |
2230 | data->timestamp = jiffies; | |
2231 | ||
2232 | /* Set the initial flags for the task. */ | |
2233 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2234 | ||
2235 | /* Finalize the task. */ | |
963d8fe5 | 2236 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data); |
1da177e4 LT |
2237 | rpc_call_setup(task, &msg, 0); |
2238 | } | |
2239 | ||
963d8fe5 | 2240 | static void nfs4_commit_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2241 | { |
963d8fe5 | 2242 | struct nfs_write_data *data = calldata; |
1da177e4 LT |
2243 | struct inode *inode = data->inode; |
2244 | ||
2245 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2246 | rpc_restart_call(task); | |
2247 | return; | |
2248 | } | |
4f9838c7 TM |
2249 | if (task->tk_status >= 0) |
2250 | nfs_post_op_update_inode(inode, data->res.fattr); | |
1da177e4 | 2251 | /* Call back common NFS writeback processing */ |
963d8fe5 | 2252 | nfs_commit_done(task, calldata); |
1da177e4 LT |
2253 | } |
2254 | ||
963d8fe5 TM |
2255 | static const struct rpc_call_ops nfs4_commit_ops = { |
2256 | .rpc_call_done = nfs4_commit_done, | |
2257 | .rpc_release = nfs_commit_release, | |
2258 | }; | |
2259 | ||
1da177e4 LT |
2260 | static void |
2261 | nfs4_proc_commit_setup(struct nfs_write_data *data, int how) | |
2262 | { | |
2263 | struct rpc_task *task = &data->task; | |
2264 | struct rpc_message msg = { | |
2265 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2266 | .rpc_argp = &data->args, | |
2267 | .rpc_resp = &data->res, | |
2268 | .rpc_cred = data->cred, | |
2269 | }; | |
2270 | struct inode *inode = data->inode; | |
4f9838c7 | 2271 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2272 | int flags; |
2273 | ||
4f9838c7 TM |
2274 | data->args.bitmask = server->attr_bitmask; |
2275 | data->res.server = server; | |
2276 | ||
1da177e4 LT |
2277 | /* Set the initial flags for the task. */ |
2278 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2279 | ||
2280 | /* Finalize the task. */ | |
963d8fe5 | 2281 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data); |
1da177e4 LT |
2282 | rpc_call_setup(task, &msg, 0); |
2283 | } | |
2284 | ||
2285 | /* | |
2286 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2287 | * standalone procedure for queueing an asynchronous RENEW. | |
2288 | */ | |
963d8fe5 | 2289 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 LT |
2290 | { |
2291 | struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; | |
963d8fe5 | 2292 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2293 | |
2294 | if (task->tk_status < 0) { | |
2295 | switch (task->tk_status) { | |
2296 | case -NFS4ERR_STALE_CLIENTID: | |
2297 | case -NFS4ERR_EXPIRED: | |
2298 | case -NFS4ERR_CB_PATH_DOWN: | |
2299 | nfs4_schedule_state_recovery(clp); | |
2300 | } | |
2301 | return; | |
2302 | } | |
2303 | spin_lock(&clp->cl_lock); | |
2304 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2305 | clp->cl_last_renewal = timestamp; | |
2306 | spin_unlock(&clp->cl_lock); | |
2307 | } | |
2308 | ||
963d8fe5 TM |
2309 | static const struct rpc_call_ops nfs4_renew_ops = { |
2310 | .rpc_call_done = nfs4_renew_done, | |
2311 | }; | |
2312 | ||
1da177e4 LT |
2313 | int |
2314 | nfs4_proc_async_renew(struct nfs4_client *clp) | |
2315 | { | |
2316 | struct rpc_message msg = { | |
2317 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2318 | .rpc_argp = clp, | |
2319 | .rpc_cred = clp->cl_cred, | |
2320 | }; | |
2321 | ||
2322 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2323 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2324 | } |
2325 | ||
2326 | int | |
2327 | nfs4_proc_renew(struct nfs4_client *clp) | |
2328 | { | |
2329 | struct rpc_message msg = { | |
2330 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2331 | .rpc_argp = clp, | |
2332 | .rpc_cred = clp->cl_cred, | |
2333 | }; | |
2334 | unsigned long now = jiffies; | |
2335 | int status; | |
2336 | ||
2337 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2338 | if (status < 0) | |
2339 | return status; | |
2340 | spin_lock(&clp->cl_lock); | |
2341 | if (time_before(clp->cl_last_renewal,now)) | |
2342 | clp->cl_last_renewal = now; | |
2343 | spin_unlock(&clp->cl_lock); | |
2344 | return 0; | |
2345 | } | |
2346 | ||
aa1870af BF |
2347 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2348 | { | |
2349 | return (server->caps & NFS_CAP_ACLS) | |
2350 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2351 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2352 | } | |
2353 | ||
2354 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2355 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2356 | * the stack. | |
2357 | */ | |
2358 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2359 | ||
2360 | static void buf_to_pages(const void *buf, size_t buflen, | |
2361 | struct page **pages, unsigned int *pgbase) | |
2362 | { | |
2363 | const void *p = buf; | |
2364 | ||
2365 | *pgbase = offset_in_page(buf); | |
2366 | p -= *pgbase; | |
2367 | while (p < buf + buflen) { | |
2368 | *(pages++) = virt_to_page(p); | |
2369 | p += PAGE_CACHE_SIZE; | |
2370 | } | |
2371 | } | |
2372 | ||
e50a1c2e BF |
2373 | struct nfs4_cached_acl { |
2374 | int cached; | |
2375 | size_t len; | |
3e9d4154 | 2376 | char data[0]; |
e50a1c2e BF |
2377 | }; |
2378 | ||
2379 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2380 | { | |
2381 | struct nfs_inode *nfsi = NFS_I(inode); | |
2382 | ||
2383 | spin_lock(&inode->i_lock); | |
2384 | kfree(nfsi->nfs4_acl); | |
2385 | nfsi->nfs4_acl = acl; | |
2386 | spin_unlock(&inode->i_lock); | |
2387 | } | |
2388 | ||
2389 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2390 | { | |
2391 | nfs4_set_cached_acl(inode, NULL); | |
2392 | } | |
2393 | ||
2394 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2395 | { | |
2396 | struct nfs_inode *nfsi = NFS_I(inode); | |
2397 | struct nfs4_cached_acl *acl; | |
2398 | int ret = -ENOENT; | |
2399 | ||
2400 | spin_lock(&inode->i_lock); | |
2401 | acl = nfsi->nfs4_acl; | |
2402 | if (acl == NULL) | |
2403 | goto out; | |
2404 | if (buf == NULL) /* user is just asking for length */ | |
2405 | goto out_len; | |
2406 | if (acl->cached == 0) | |
2407 | goto out; | |
2408 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2409 | if (acl->len > buflen) | |
2410 | goto out; | |
2411 | memcpy(buf, acl->data, acl->len); | |
2412 | out_len: | |
2413 | ret = acl->len; | |
2414 | out: | |
2415 | spin_unlock(&inode->i_lock); | |
2416 | return ret; | |
2417 | } | |
2418 | ||
2419 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2420 | { | |
2421 | struct nfs4_cached_acl *acl; | |
2422 | ||
2423 | if (buf && acl_len <= PAGE_SIZE) { | |
2424 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2425 | if (acl == NULL) | |
2426 | goto out; | |
2427 | acl->cached = 1; | |
2428 | memcpy(acl->data, buf, acl_len); | |
2429 | } else { | |
2430 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2431 | if (acl == NULL) | |
2432 | goto out; | |
2433 | acl->cached = 0; | |
2434 | } | |
2435 | acl->len = acl_len; | |
2436 | out: | |
2437 | nfs4_set_cached_acl(inode, acl); | |
2438 | } | |
2439 | ||
2440 | static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
aa1870af | 2441 | { |
aa1870af BF |
2442 | struct page *pages[NFS4ACL_MAXPAGES]; |
2443 | struct nfs_getaclargs args = { | |
2444 | .fh = NFS_FH(inode), | |
2445 | .acl_pages = pages, | |
2446 | .acl_len = buflen, | |
2447 | }; | |
2448 | size_t resp_len = buflen; | |
e50a1c2e | 2449 | void *resp_buf; |
aa1870af BF |
2450 | struct rpc_message msg = { |
2451 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2452 | .rpc_argp = &args, | |
2453 | .rpc_resp = &resp_len, | |
2454 | }; | |
e50a1c2e | 2455 | struct page *localpage = NULL; |
aa1870af BF |
2456 | int ret; |
2457 | ||
e50a1c2e BF |
2458 | if (buflen < PAGE_SIZE) { |
2459 | /* As long as we're doing a round trip to the server anyway, | |
2460 | * let's be prepared for a page of acl data. */ | |
2461 | localpage = alloc_page(GFP_KERNEL); | |
2462 | resp_buf = page_address(localpage); | |
2463 | if (localpage == NULL) | |
2464 | return -ENOMEM; | |
2465 | args.acl_pages[0] = localpage; | |
2466 | args.acl_pgbase = 0; | |
1d95db8e | 2467 | resp_len = args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2468 | } else { |
2469 | resp_buf = buf; | |
2470 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2471 | } | |
aa1870af | 2472 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2473 | if (ret) |
2474 | goto out_free; | |
2475 | if (resp_len > args.acl_len) | |
2476 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2477 | else | |
2478 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2479 | if (buf) { | |
2480 | ret = -ERANGE; | |
2481 | if (resp_len > buflen) | |
2482 | goto out_free; | |
2483 | if (localpage) | |
2484 | memcpy(buf, resp_buf, resp_len); | |
2485 | } | |
2486 | ret = resp_len; | |
2487 | out_free: | |
2488 | if (localpage) | |
2489 | __free_page(localpage); | |
aa1870af BF |
2490 | return ret; |
2491 | } | |
2492 | ||
e50a1c2e BF |
2493 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2494 | { | |
2495 | struct nfs_server *server = NFS_SERVER(inode); | |
2496 | int ret; | |
2497 | ||
2498 | if (!nfs4_server_supports_acls(server)) | |
2499 | return -EOPNOTSUPP; | |
2500 | ret = nfs_revalidate_inode(server, inode); | |
2501 | if (ret < 0) | |
2502 | return ret; | |
2503 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2504 | if (ret != -ENOENT) | |
2505 | return ret; | |
2506 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2507 | } | |
2508 | ||
4b580ee3 BF |
2509 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2510 | { | |
2511 | struct nfs_server *server = NFS_SERVER(inode); | |
2512 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2513 | struct nfs_setaclargs arg = { | |
2514 | .fh = NFS_FH(inode), | |
2515 | .acl_pages = pages, | |
2516 | .acl_len = buflen, | |
2517 | }; | |
2518 | struct rpc_message msg = { | |
2519 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2520 | .rpc_argp = &arg, | |
2521 | .rpc_resp = NULL, | |
2522 | }; | |
2523 | int ret; | |
2524 | ||
2525 | if (!nfs4_server_supports_acls(server)) | |
2526 | return -EOPNOTSUPP; | |
642ac549 | 2527 | nfs_inode_return_delegation(inode); |
4b580ee3 BF |
2528 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
2529 | ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); | |
e50a1c2e BF |
2530 | if (ret == 0) |
2531 | nfs4_write_cached_acl(inode, buf, buflen); | |
4b580ee3 BF |
2532 | return ret; |
2533 | } | |
2534 | ||
1da177e4 | 2535 | static int |
faf5f49c | 2536 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
1da177e4 LT |
2537 | { |
2538 | struct nfs4_client *clp = server->nfs4_state; | |
2539 | ||
2540 | if (!clp || task->tk_status >= 0) | |
2541 | return 0; | |
2542 | switch(task->tk_status) { | |
2543 | case -NFS4ERR_STALE_CLIENTID: | |
2544 | case -NFS4ERR_STALE_STATEID: | |
2545 | case -NFS4ERR_EXPIRED: | |
2546 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2547 | nfs4_schedule_state_recovery(clp); | |
2548 | if (test_bit(NFS4CLNT_OK, &clp->cl_state)) | |
2549 | rpc_wake_up_task(task); | |
2550 | task->tk_status = 0; | |
2551 | return -EAGAIN; | |
2552 | case -NFS4ERR_GRACE: | |
2553 | case -NFS4ERR_DELAY: | |
2554 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
2555 | task->tk_status = 0; | |
2556 | return -EAGAIN; | |
2557 | case -NFS4ERR_OLD_STATEID: | |
2558 | task->tk_status = 0; | |
2559 | return -EAGAIN; | |
2560 | } | |
2561 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2562 | return 0; | |
2563 | } | |
2564 | ||
2565 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) | |
2566 | { | |
2567 | DEFINE_WAIT(wait); | |
2568 | sigset_t oldset; | |
2569 | int interruptible, res = 0; | |
2570 | ||
2571 | might_sleep(); | |
2572 | ||
2573 | rpc_clnt_sigmask(clnt, &oldset); | |
2574 | interruptible = TASK_UNINTERRUPTIBLE; | |
2575 | if (clnt->cl_intr) | |
2576 | interruptible = TASK_INTERRUPTIBLE; | |
2577 | prepare_to_wait(&clp->cl_waitq, &wait, interruptible); | |
2578 | nfs4_schedule_state_recovery(clp); | |
2579 | if (clnt->cl_intr && signalled()) | |
2580 | res = -ERESTARTSYS; | |
2581 | else if (!test_bit(NFS4CLNT_OK, &clp->cl_state)) | |
2582 | schedule(); | |
2583 | finish_wait(&clp->cl_waitq, &wait); | |
2584 | rpc_clnt_sigunmask(clnt, &oldset); | |
2585 | return res; | |
2586 | } | |
2587 | ||
2588 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2589 | { | |
2590 | sigset_t oldset; | |
2591 | int res = 0; | |
2592 | ||
2593 | might_sleep(); | |
2594 | ||
2595 | if (*timeout <= 0) | |
2596 | *timeout = NFS4_POLL_RETRY_MIN; | |
2597 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2598 | *timeout = NFS4_POLL_RETRY_MAX; | |
2599 | rpc_clnt_sigmask(clnt, &oldset); | |
2600 | if (clnt->cl_intr) { | |
041e0e3b | 2601 | schedule_timeout_interruptible(*timeout); |
1da177e4 LT |
2602 | if (signalled()) |
2603 | res = -ERESTARTSYS; | |
041e0e3b NA |
2604 | } else |
2605 | schedule_timeout_uninterruptible(*timeout); | |
1da177e4 LT |
2606 | rpc_clnt_sigunmask(clnt, &oldset); |
2607 | *timeout <<= 1; | |
2608 | return res; | |
2609 | } | |
2610 | ||
2611 | /* This is the error handling routine for processes that are allowed | |
2612 | * to sleep. | |
2613 | */ | |
faf5f49c | 2614 | int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
1da177e4 LT |
2615 | { |
2616 | struct nfs4_client *clp = server->nfs4_state; | |
2617 | int ret = errorcode; | |
2618 | ||
2619 | exception->retry = 0; | |
2620 | switch(errorcode) { | |
2621 | case 0: | |
2622 | return 0; | |
2623 | case -NFS4ERR_STALE_CLIENTID: | |
2624 | case -NFS4ERR_STALE_STATEID: | |
2625 | case -NFS4ERR_EXPIRED: | |
2626 | ret = nfs4_wait_clnt_recover(server->client, clp); | |
2627 | if (ret == 0) | |
2628 | exception->retry = 1; | |
2629 | break; | |
2630 | case -NFS4ERR_GRACE: | |
2631 | case -NFS4ERR_DELAY: | |
2632 | ret = nfs4_delay(server->client, &exception->timeout); | |
2c56617d TM |
2633 | if (ret != 0) |
2634 | break; | |
1da177e4 | 2635 | case -NFS4ERR_OLD_STATEID: |
2c56617d | 2636 | exception->retry = 1; |
1da177e4 LT |
2637 | } |
2638 | /* We failed to handle the error */ | |
2639 | return nfs4_map_errors(ret); | |
2640 | } | |
2641 | ||
2642 | int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port) | |
2643 | { | |
2644 | nfs4_verifier sc_verifier; | |
2645 | struct nfs4_setclientid setclientid = { | |
2646 | .sc_verifier = &sc_verifier, | |
2647 | .sc_prog = program, | |
2648 | }; | |
2649 | struct rpc_message msg = { | |
2650 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2651 | .rpc_argp = &setclientid, | |
2652 | .rpc_resp = clp, | |
2653 | .rpc_cred = clp->cl_cred, | |
2654 | }; | |
2655 | u32 *p; | |
2656 | int loop = 0; | |
2657 | int status; | |
2658 | ||
2659 | p = (u32*)sc_verifier.data; | |
2660 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
2661 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2662 | ||
2663 | for(;;) { | |
2664 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2665 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
2666 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), | |
2667 | clp->cl_cred->cr_ops->cr_name, | |
2668 | clp->cl_id_uniquifier); | |
2669 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2670 | sizeof(setclientid.sc_netid), "tcp"); | |
2671 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2672 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2673 | clp->cl_ipaddr, port >> 8, port & 255); | |
2674 | ||
2675 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2676 | if (status != -NFS4ERR_CLID_INUSE) | |
2677 | break; | |
2678 | if (signalled()) | |
2679 | break; | |
2680 | if (loop++ & 1) | |
2681 | ssleep(clp->cl_lease_time + 1); | |
2682 | else | |
2683 | if (++clp->cl_id_uniquifier == 0) | |
2684 | break; | |
2685 | } | |
2686 | return status; | |
2687 | } | |
2688 | ||
2689 | int | |
2690 | nfs4_proc_setclientid_confirm(struct nfs4_client *clp) | |
2691 | { | |
2692 | struct nfs_fsinfo fsinfo; | |
2693 | struct rpc_message msg = { | |
2694 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2695 | .rpc_argp = clp, | |
2696 | .rpc_resp = &fsinfo, | |
2697 | .rpc_cred = clp->cl_cred, | |
2698 | }; | |
2699 | unsigned long now; | |
2700 | int status; | |
2701 | ||
2702 | now = jiffies; | |
2703 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2704 | if (status == 0) { | |
2705 | spin_lock(&clp->cl_lock); | |
2706 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2707 | clp->cl_last_renewal = now; | |
2708 | spin_unlock(&clp->cl_lock); | |
2709 | } | |
2710 | return status; | |
2711 | } | |
2712 | ||
2713 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2714 | { | |
2715 | struct nfs4_delegreturnargs args = { | |
2716 | .fhandle = NFS_FH(inode), | |
2717 | .stateid = stateid, | |
2718 | }; | |
2719 | struct rpc_message msg = { | |
2720 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
2721 | .rpc_argp = &args, | |
2722 | .rpc_cred = cred, | |
2723 | }; | |
2724 | ||
2725 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
2726 | } | |
2727 | ||
2728 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2729 | { | |
2730 | struct nfs_server *server = NFS_SERVER(inode); | |
2731 | struct nfs4_exception exception = { }; | |
2732 | int err; | |
2733 | do { | |
2734 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
2735 | switch (err) { | |
2736 | case -NFS4ERR_STALE_STATEID: | |
2737 | case -NFS4ERR_EXPIRED: | |
2738 | nfs4_schedule_state_recovery(server->nfs4_state); | |
2739 | case 0: | |
2740 | return 0; | |
2741 | } | |
2742 | err = nfs4_handle_exception(server, err, &exception); | |
2743 | } while (exception.retry); | |
2744 | return err; | |
2745 | } | |
2746 | ||
2747 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
2748 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
2749 | ||
2750 | /* | |
2751 | * sleep, with exponential backoff, and retry the LOCK operation. | |
2752 | */ | |
2753 | static unsigned long | |
2754 | nfs4_set_lock_task_retry(unsigned long timeout) | |
2755 | { | |
041e0e3b | 2756 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
2757 | timeout <<= 1; |
2758 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
2759 | return NFS4_LOCK_MAXTIMEOUT; | |
2760 | return timeout; | |
2761 | } | |
2762 | ||
2763 | static inline int | |
2764 | nfs4_lck_type(int cmd, struct file_lock *request) | |
2765 | { | |
2766 | /* set lock type */ | |
2767 | switch (request->fl_type) { | |
2768 | case F_RDLCK: | |
2769 | return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT; | |
2770 | case F_WRLCK: | |
2771 | return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT; | |
2772 | case F_UNLCK: | |
2773 | return NFS4_WRITE_LT; | |
2774 | } | |
2775 | BUG(); | |
2776 | return 0; | |
2777 | } | |
2778 | ||
2779 | static inline uint64_t | |
2780 | nfs4_lck_length(struct file_lock *request) | |
2781 | { | |
2782 | if (request->fl_end == OFFSET_MAX) | |
2783 | return ~(uint64_t)0; | |
2784 | return request->fl_end - request->fl_start + 1; | |
2785 | } | |
2786 | ||
2787 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
2788 | { | |
2789 | struct inode *inode = state->inode; | |
2790 | struct nfs_server *server = NFS_SERVER(inode); | |
2791 | struct nfs4_client *clp = server->nfs4_state; | |
2792 | struct nfs_lockargs arg = { | |
2793 | .fh = NFS_FH(inode), | |
2794 | .type = nfs4_lck_type(cmd, request), | |
2795 | .offset = request->fl_start, | |
2796 | .length = nfs4_lck_length(request), | |
2797 | }; | |
2798 | struct nfs_lockres res = { | |
2799 | .server = server, | |
2800 | }; | |
2801 | struct rpc_message msg = { | |
2802 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
2803 | .rpc_argp = &arg, | |
2804 | .rpc_resp = &res, | |
2805 | .rpc_cred = state->owner->so_cred, | |
2806 | }; | |
2807 | struct nfs_lowner nlo; | |
2808 | struct nfs4_lock_state *lsp; | |
2809 | int status; | |
2810 | ||
2811 | down_read(&clp->cl_sem); | |
2812 | nlo.clientid = clp->cl_clientid; | |
8d0a8a9d TM |
2813 | status = nfs4_set_lock_state(state, request); |
2814 | if (status != 0) | |
2815 | goto out; | |
2816 | lsp = request->fl_u.nfs4_fl.owner; | |
2817 | nlo.id = lsp->ls_id; | |
1da177e4 LT |
2818 | arg.u.lockt = &nlo; |
2819 | status = rpc_call_sync(server->client, &msg, 0); | |
2820 | if (!status) { | |
2821 | request->fl_type = F_UNLCK; | |
2822 | } else if (status == -NFS4ERR_DENIED) { | |
2823 | int64_t len, start, end; | |
2824 | start = res.u.denied.offset; | |
2825 | len = res.u.denied.length; | |
2826 | end = start + len - 1; | |
2827 | if (end < 0 || len == 0) | |
2828 | request->fl_end = OFFSET_MAX; | |
2829 | else | |
2830 | request->fl_end = (loff_t)end; | |
2831 | request->fl_start = (loff_t)start; | |
2832 | request->fl_type = F_WRLCK; | |
2833 | if (res.u.denied.type & 1) | |
2834 | request->fl_type = F_RDLCK; | |
2835 | request->fl_pid = 0; | |
2836 | status = 0; | |
2837 | } | |
8d0a8a9d | 2838 | out: |
1da177e4 LT |
2839 | up_read(&clp->cl_sem); |
2840 | return status; | |
2841 | } | |
2842 | ||
2843 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
2844 | { | |
2845 | struct nfs4_exception exception = { }; | |
2846 | int err; | |
2847 | ||
2848 | do { | |
2849 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
2850 | _nfs4_proc_getlk(state, cmd, request), | |
2851 | &exception); | |
2852 | } while (exception.retry); | |
2853 | return err; | |
2854 | } | |
2855 | ||
2856 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
2857 | { | |
2858 | int res = 0; | |
2859 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
2860 | case FL_POSIX: | |
2861 | res = posix_lock_file_wait(file, fl); | |
2862 | break; | |
2863 | case FL_FLOCK: | |
2864 | res = flock_lock_file_wait(file, fl); | |
2865 | break; | |
2866 | default: | |
2867 | BUG(); | |
2868 | } | |
2869 | if (res < 0) | |
2870 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", | |
2871 | __FUNCTION__); | |
2872 | return res; | |
2873 | } | |
2874 | ||
faf5f49c TM |
2875 | struct nfs4_unlockdata { |
2876 | struct nfs_lockargs arg; | |
2877 | struct nfs_locku_opargs luargs; | |
2878 | struct nfs_lockres res; | |
2879 | struct nfs4_lock_state *lsp; | |
2880 | struct nfs_open_context *ctx; | |
faf5f49c TM |
2881 | }; |
2882 | ||
06f814a3 | 2883 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 2884 | { |
963d8fe5 | 2885 | struct nfs4_unlockdata *calldata = data; |
06f814a3 TM |
2886 | nfs_free_seqid(calldata->luargs.seqid); |
2887 | nfs4_put_lock_state(calldata->lsp); | |
2888 | put_nfs_open_context(calldata->ctx); | |
2889 | kfree(calldata); | |
faf5f49c TM |
2890 | } |
2891 | ||
963d8fe5 | 2892 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 2893 | { |
963d8fe5 | 2894 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 2895 | |
06f814a3 TM |
2896 | if (RPC_ASSASSINATED(task)) |
2897 | return; | |
faf5f49c TM |
2898 | nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid); |
2899 | switch (task->tk_status) { | |
2900 | case 0: | |
2901 | memcpy(calldata->lsp->ls_stateid.data, | |
2902 | calldata->res.u.stateid.data, | |
2903 | sizeof(calldata->lsp->ls_stateid.data)); | |
2904 | break; | |
2905 | case -NFS4ERR_STALE_STATEID: | |
2906 | case -NFS4ERR_EXPIRED: | |
2907 | nfs4_schedule_state_recovery(calldata->res.server->nfs4_state); | |
2908 | break; | |
2909 | default: | |
2910 | if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) { | |
2911 | rpc_restart_call(task); | |
faf5f49c TM |
2912 | } |
2913 | } | |
faf5f49c TM |
2914 | } |
2915 | ||
4ce70ada | 2916 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 2917 | { |
4ce70ada | 2918 | struct nfs4_unlockdata *calldata = data; |
1da177e4 LT |
2919 | struct rpc_message msg = { |
2920 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
faf5f49c TM |
2921 | .rpc_argp = &calldata->arg, |
2922 | .rpc_resp = &calldata->res, | |
2923 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
1da177e4 | 2924 | }; |
faf5f49c TM |
2925 | int status; |
2926 | ||
2927 | status = nfs_wait_on_sequence(calldata->luargs.seqid, task); | |
2928 | if (status != 0) | |
2929 | return; | |
2930 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
2931 | /* Note: exit _without_ running nfs4_locku_done */ |
2932 | task->tk_action = NULL; | |
faf5f49c TM |
2933 | return; |
2934 | } | |
2935 | rpc_call_setup(task, &msg, 0); | |
2936 | } | |
2937 | ||
963d8fe5 | 2938 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 2939 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 2940 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 2941 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
2942 | }; |
2943 | ||
faf5f49c TM |
2944 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
2945 | { | |
2946 | struct nfs4_unlockdata *calldata; | |
2947 | struct inode *inode = state->inode; | |
2948 | struct nfs_server *server = NFS_SERVER(inode); | |
1da177e4 | 2949 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
2950 | struct rpc_task *task; |
2951 | int status = 0; | |
faf5f49c | 2952 | |
6bfc93ef TM |
2953 | /* Is this a delegated lock? */ |
2954 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
06f814a3 | 2955 | goto out; |
6bfc93ef | 2956 | |
8d0a8a9d TM |
2957 | status = nfs4_set_lock_state(state, request); |
2958 | if (status != 0) | |
06f814a3 | 2959 | goto out; |
8d0a8a9d | 2960 | lsp = request->fl_u.nfs4_fl.owner; |
1da177e4 | 2961 | /* We might have lost the locks! */ |
8d0a8a9d | 2962 | if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) |
06f814a3 TM |
2963 | goto out; |
2964 | status = -ENOMEM; | |
faf5f49c TM |
2965 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
2966 | if (calldata == NULL) | |
06f814a3 | 2967 | goto out; |
faf5f49c TM |
2968 | calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
2969 | if (calldata->luargs.seqid == NULL) { | |
2970 | kfree(calldata); | |
06f814a3 | 2971 | goto out; |
faf5f49c TM |
2972 | } |
2973 | calldata->luargs.stateid = &lsp->ls_stateid; | |
2974 | calldata->arg.fh = NFS_FH(inode); | |
2975 | calldata->arg.type = nfs4_lck_type(cmd, request); | |
2976 | calldata->arg.offset = request->fl_start; | |
2977 | calldata->arg.length = nfs4_lck_length(request); | |
2978 | calldata->arg.u.locku = &calldata->luargs; | |
2979 | calldata->res.server = server; | |
2980 | calldata->lsp = lsp; | |
2981 | atomic_inc(&lsp->ls_count); | |
2982 | ||
2983 | /* Ensure we don't close file until we're done freeing locks! */ | |
2984 | calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data); | |
2985 | ||
06f814a3 TM |
2986 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_locku_ops, calldata); |
2987 | if (!IS_ERR(task)) { | |
2988 | status = nfs4_wait_for_completion_rpc_task(task); | |
2989 | rpc_release_task(task); | |
2990 | } else { | |
2991 | status = PTR_ERR(task); | |
2992 | nfs4_locku_release_calldata(calldata); | |
2993 | } | |
2994 | out: | |
faf5f49c | 2995 | do_vfs_lock(request->fl_file, request); |
1da177e4 LT |
2996 | return status; |
2997 | } | |
2998 | ||
1da177e4 LT |
2999 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim) |
3000 | { | |
3001 | struct inode *inode = state->inode; | |
3002 | struct nfs_server *server = NFS_SERVER(inode); | |
8d0a8a9d | 3003 | struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; |
06735b34 TM |
3004 | struct nfs_lock_opargs largs = { |
3005 | .lock_stateid = &lsp->ls_stateid, | |
3006 | .open_stateid = &state->stateid, | |
3007 | .lock_owner = { | |
3008 | .clientid = server->nfs4_state->cl_clientid, | |
3009 | .id = lsp->ls_id, | |
3010 | }, | |
3011 | .reclaim = reclaim, | |
3012 | }; | |
1da177e4 LT |
3013 | struct nfs_lockargs arg = { |
3014 | .fh = NFS_FH(inode), | |
3015 | .type = nfs4_lck_type(cmd, request), | |
3016 | .offset = request->fl_start, | |
3017 | .length = nfs4_lck_length(request), | |
06735b34 TM |
3018 | .u = { |
3019 | .lock = &largs, | |
3020 | }, | |
1da177e4 LT |
3021 | }; |
3022 | struct nfs_lockres res = { | |
3023 | .server = server, | |
3024 | }; | |
3025 | struct rpc_message msg = { | |
3026 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3027 | .rpc_argp = &arg, | |
3028 | .rpc_resp = &res, | |
3029 | .rpc_cred = state->owner->so_cred, | |
3030 | }; | |
cee54fc9 | 3031 | int status = -ENOMEM; |
1da177e4 | 3032 | |
06735b34 TM |
3033 | largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3034 | if (largs.lock_seqid == NULL) | |
cee54fc9 TM |
3035 | return -ENOMEM; |
3036 | if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) { | |
1da177e4 | 3037 | struct nfs4_state_owner *owner = state->owner; |
06735b34 TM |
3038 | |
3039 | largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid); | |
3040 | if (largs.open_seqid == NULL) | |
3041 | goto out; | |
1da177e4 | 3042 | largs.new_lock_owner = 1; |
06735b34 TM |
3043 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
3044 | /* increment open seqid on success, and seqid mutating errors */ | |
3045 | if (largs.new_lock_owner != 0) { | |
3046 | nfs_increment_open_seqid(status, largs.open_seqid); | |
3047 | if (status == 0) | |
3048 | nfs_confirm_seqid(&lsp->ls_seqid, 0); | |
8d0a8a9d | 3049 | } |
06735b34 TM |
3050 | nfs_free_seqid(largs.open_seqid); |
3051 | } else | |
1da177e4 | 3052 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
06735b34 TM |
3053 | /* increment lock seqid on success, and seqid mutating errors*/ |
3054 | nfs_increment_lock_seqid(status, largs.lock_seqid); | |
1da177e4 | 3055 | /* save the returned stateid. */ |
cee54fc9 | 3056 | if (status == 0) { |
06735b34 TM |
3057 | memcpy(lsp->ls_stateid.data, res.u.stateid.data, |
3058 | sizeof(lsp->ls_stateid.data)); | |
cee54fc9 TM |
3059 | lsp->ls_flags |= NFS_LOCK_INITIALIZED; |
3060 | } else if (status == -NFS4ERR_DENIED) | |
1da177e4 | 3061 | status = -EAGAIN; |
06735b34 TM |
3062 | out: |
3063 | nfs_free_seqid(largs.lock_seqid); | |
1da177e4 LT |
3064 | return status; |
3065 | } | |
3066 | ||
3067 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3068 | { | |
202b50dc TM |
3069 | struct nfs_server *server = NFS_SERVER(state->inode); |
3070 | struct nfs4_exception exception = { }; | |
3071 | int err; | |
3072 | ||
6bfc93ef TM |
3073 | /* Cache the lock if possible... */ |
3074 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3075 | return 0; | |
202b50dc TM |
3076 | do { |
3077 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); | |
3078 | if (err != -NFS4ERR_DELAY) | |
3079 | break; | |
3080 | nfs4_handle_exception(server, err, &exception); | |
3081 | } while (exception.retry); | |
3082 | return err; | |
1da177e4 LT |
3083 | } |
3084 | ||
3085 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3086 | { | |
202b50dc TM |
3087 | struct nfs_server *server = NFS_SERVER(state->inode); |
3088 | struct nfs4_exception exception = { }; | |
3089 | int err; | |
3090 | ||
6bfc93ef TM |
3091 | err = nfs4_set_lock_state(state, request); |
3092 | if (err != 0) | |
3093 | return err; | |
202b50dc TM |
3094 | do { |
3095 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); | |
3096 | if (err != -NFS4ERR_DELAY) | |
3097 | break; | |
3098 | nfs4_handle_exception(server, err, &exception); | |
3099 | } while (exception.retry); | |
3100 | return err; | |
1da177e4 LT |
3101 | } |
3102 | ||
3103 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3104 | { | |
3105 | struct nfs4_client *clp = state->owner->so_client; | |
3106 | int status; | |
3107 | ||
6bfc93ef | 3108 | /* Is this a delegated open? */ |
ff604066 | 3109 | if (NFS_I(state->inode)->delegation_state != 0) { |
6bfc93ef TM |
3110 | /* Yes: cache locks! */ |
3111 | status = do_vfs_lock(request->fl_file, request); | |
3112 | /* ...but avoid races with delegation recall... */ | |
3113 | if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
ff604066 | 3114 | return status; |
1da177e4 | 3115 | } |
ff604066 | 3116 | down_read(&clp->cl_sem); |
6bfc93ef TM |
3117 | status = nfs4_set_lock_state(state, request); |
3118 | if (status != 0) | |
3119 | goto out; | |
3120 | status = _nfs4_do_setlk(state, cmd, request, 0); | |
3121 | if (status != 0) | |
3122 | goto out; | |
3123 | /* Note: we always want to sleep here! */ | |
3124 | request->fl_flags |= FL_SLEEP; | |
3125 | if (do_vfs_lock(request->fl_file, request) < 0) | |
3126 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
3127 | out: | |
1da177e4 LT |
3128 | up_read(&clp->cl_sem); |
3129 | return status; | |
3130 | } | |
3131 | ||
3132 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3133 | { | |
3134 | struct nfs4_exception exception = { }; | |
3135 | int err; | |
3136 | ||
3137 | do { | |
3138 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3139 | _nfs4_proc_setlk(state, cmd, request), | |
3140 | &exception); | |
3141 | } while (exception.retry); | |
3142 | return err; | |
3143 | } | |
3144 | ||
3145 | static int | |
3146 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3147 | { | |
3148 | struct nfs_open_context *ctx; | |
3149 | struct nfs4_state *state; | |
3150 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3151 | int status; | |
3152 | ||
3153 | /* verify open state */ | |
3154 | ctx = (struct nfs_open_context *)filp->private_data; | |
3155 | state = ctx->state; | |
3156 | ||
3157 | if (request->fl_start < 0 || request->fl_end < 0) | |
3158 | return -EINVAL; | |
3159 | ||
3160 | if (IS_GETLK(cmd)) | |
3161 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3162 | ||
3163 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3164 | return -EINVAL; | |
3165 | ||
3166 | if (request->fl_type == F_UNLCK) | |
3167 | return nfs4_proc_unlck(state, cmd, request); | |
3168 | ||
3169 | do { | |
3170 | status = nfs4_proc_setlk(state, cmd, request); | |
3171 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3172 | break; | |
3173 | timeout = nfs4_set_lock_task_retry(timeout); | |
3174 | status = -ERESTARTSYS; | |
3175 | if (signalled()) | |
3176 | break; | |
3177 | } while(status < 0); | |
1da177e4 LT |
3178 | return status; |
3179 | } | |
3180 | ||
888e694c TM |
3181 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3182 | { | |
3183 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3184 | struct nfs4_exception exception = { }; | |
3185 | int err; | |
3186 | ||
3187 | err = nfs4_set_lock_state(state, fl); | |
3188 | if (err != 0) | |
3189 | goto out; | |
3190 | do { | |
3191 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3192 | if (err != -NFS4ERR_DELAY) | |
3193 | break; | |
3194 | err = nfs4_handle_exception(server, err, &exception); | |
3195 | } while (exception.retry); | |
3196 | out: | |
3197 | return err; | |
3198 | } | |
6b3b5496 | 3199 | |
aa1870af BF |
3200 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3201 | ||
6b3b5496 BF |
3202 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3203 | size_t buflen, int flags) | |
3204 | { | |
4b580ee3 BF |
3205 | struct inode *inode = dentry->d_inode; |
3206 | ||
3207 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3208 | return -EOPNOTSUPP; | |
3209 | ||
3210 | if (!S_ISREG(inode->i_mode) && | |
3211 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3212 | return -EPERM; | |
3213 | ||
3214 | return nfs4_proc_set_acl(inode, buf, buflen); | |
6b3b5496 BF |
3215 | } |
3216 | ||
3217 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3218 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3219 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3220 | * attributes in kernel-managed attribute namespaces. */ | |
3221 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3222 | size_t buflen) | |
3223 | { | |
aa1870af BF |
3224 | struct inode *inode = dentry->d_inode; |
3225 | ||
3226 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3227 | return -EOPNOTSUPP; | |
3228 | ||
3229 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3230 | } |
3231 | ||
3232 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3233 | { | |
aa1870af | 3234 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 BF |
3235 | |
3236 | if (buf && buflen < len) | |
3237 | return -ERANGE; | |
3238 | if (buf) | |
aa1870af BF |
3239 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3240 | return len; | |
6b3b5496 BF |
3241 | } |
3242 | ||
1da177e4 LT |
3243 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
3244 | .recover_open = nfs4_open_reclaim, | |
3245 | .recover_lock = nfs4_lock_reclaim, | |
3246 | }; | |
3247 | ||
3248 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3249 | .recover_open = nfs4_open_expired, | |
3250 | .recover_lock = nfs4_lock_expired, | |
3251 | }; | |
3252 | ||
6b3b5496 BF |
3253 | static struct inode_operations nfs4_file_inode_operations = { |
3254 | .permission = nfs_permission, | |
3255 | .getattr = nfs_getattr, | |
3256 | .setattr = nfs_setattr, | |
3257 | .getxattr = nfs4_getxattr, | |
3258 | .setxattr = nfs4_setxattr, | |
3259 | .listxattr = nfs4_listxattr, | |
3260 | }; | |
3261 | ||
1da177e4 LT |
3262 | struct nfs_rpc_ops nfs_v4_clientops = { |
3263 | .version = 4, /* protocol version */ | |
3264 | .dentry_ops = &nfs4_dentry_operations, | |
3265 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3266 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3267 | .getroot = nfs4_proc_get_root, |
3268 | .getattr = nfs4_proc_getattr, | |
3269 | .setattr = nfs4_proc_setattr, | |
3270 | .lookup = nfs4_proc_lookup, | |
3271 | .access = nfs4_proc_access, | |
3272 | .readlink = nfs4_proc_readlink, | |
3273 | .read = nfs4_proc_read, | |
3274 | .write = nfs4_proc_write, | |
3275 | .commit = nfs4_proc_commit, | |
3276 | .create = nfs4_proc_create, | |
3277 | .remove = nfs4_proc_remove, | |
3278 | .unlink_setup = nfs4_proc_unlink_setup, | |
3279 | .unlink_done = nfs4_proc_unlink_done, | |
3280 | .rename = nfs4_proc_rename, | |
3281 | .link = nfs4_proc_link, | |
3282 | .symlink = nfs4_proc_symlink, | |
3283 | .mkdir = nfs4_proc_mkdir, | |
3284 | .rmdir = nfs4_proc_remove, | |
3285 | .readdir = nfs4_proc_readdir, | |
3286 | .mknod = nfs4_proc_mknod, | |
3287 | .statfs = nfs4_proc_statfs, | |
3288 | .fsinfo = nfs4_proc_fsinfo, | |
3289 | .pathconf = nfs4_proc_pathconf, | |
3290 | .decode_dirent = nfs4_decode_dirent, | |
3291 | .read_setup = nfs4_proc_read_setup, | |
3292 | .write_setup = nfs4_proc_write_setup, | |
3293 | .commit_setup = nfs4_proc_commit_setup, | |
02a913a7 TM |
3294 | .file_open = nfs_open, |
3295 | .file_release = nfs_release, | |
1da177e4 | 3296 | .lock = nfs4_proc_lock, |
e50a1c2e | 3297 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3298 | }; |
3299 | ||
3300 | /* | |
3301 | * Local variables: | |
3302 | * c-basic-offset: 8 | |
3303 | * End: | |
3304 | */ |