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SUNRPC: Ensure that SIGKILL will always terminate a synchronous RPC call.
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
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
cdd4e68b 60struct nfs4_opendata;
864472e9 61static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 62static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 63static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 64static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 65static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
1da177e4
LT		 66extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
67extern struct rpc_procinfo nfs4_procedures[];
68
1da177e4
LT		 69/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
74 __FUNCTION__, -err);
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
122static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
123 struct nfs4_readdir_arg *readdir)
124{
125 u32 *start, *p;
126
127 BUG_ON(readdir->count < 80);
128 if (cookie > 2) {
b7ef1956 129 readdir->cookie = cookie;
1da177e4
LT		 130 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
131 return;
132 }
133
134 readdir->cookie = 0;
135 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
136 if (cookie == 2)
137 return;
138
139 /*
140 * NFSv4 servers do not return entries for '.' and '..'
141 * Therefore, we fake these entries here. We let '.'
142 * have cookie 0 and '..' have cookie 1. Note that
143 * when talking to the server, we always send cookie 0
144 * instead of 1 or 2.
145 */
146 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
147
148 if (cookie == 0) {
149 *p++ = xdr_one; /* next */
150 *p++ = xdr_zero; /* cookie, first word */
151 *p++ = xdr_one; /* cookie, second word */
152 *p++ = xdr_one; /* entry len */
153 memcpy(p, ".\0\0\0", 4); /* entry */
154 p++;
155 *p++ = xdr_one; /* bitmap length */
156 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
157 *p++ = htonl(8); /* attribute buffer length */
158 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
159 }
160
161 *p++ = xdr_one; /* next */
162 *p++ = xdr_zero; /* cookie, first word */
163 *p++ = xdr_two; /* cookie, second word */
164 *p++ = xdr_two; /* entry len */
165 memcpy(p, "..\0\0", 4); /* entry */
166 p++;
167 *p++ = xdr_one; /* bitmap length */
168 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
169 *p++ = htonl(8); /* attribute buffer length */
170 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
171
172 readdir->pgbase = (char *)p - (char *)start;
173 readdir->count -= readdir->pgbase;
174 kunmap_atomic(start, KM_USER0);
175}
176
177static void
178renew_lease(struct nfs_server *server, unsigned long timestamp)
179{
180 struct nfs4_client *clp = server->nfs4_state;
181 spin_lock(&clp->cl_lock);
182 if (time_before(clp->cl_last_renewal,timestamp))
183 clp->cl_last_renewal = timestamp;
184 spin_unlock(&clp->cl_lock);
185}
186
187static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
188{
189 struct nfs_inode *nfsi = NFS_I(inode);
190
decf491f
TM		 191 spin_lock(&inode->i_lock);
192 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1da177e4
LT		 193 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
194 nfsi->change_attr = cinfo->after;
decf491f 195 spin_unlock(&inode->i_lock);
1da177e4
LT		 196}
197
e56e0b78 198struct nfs4_opendata {
24ac23ab 199 atomic_t count;
e56e0b78
TM		 200 struct nfs_openargs o_arg;
201 struct nfs_openres o_res;
cdd4e68b
TM		 202 struct nfs_open_confirmargs c_arg;
203 struct nfs_open_confirmres c_res;
e56e0b78
TM		 204 struct nfs_fattr f_attr;
205 struct nfs_fattr dir_attr;
206 struct dentry *dentry;
207 struct dentry *dir;
208 struct nfs4_state_owner *owner;
209 struct iattr attrs;
24ac23ab
TM		 210 int rpc_status;
211 int cancelled;
e56e0b78
TM		 212};
213
214static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
215 struct nfs4_state_owner *sp, int flags,
216 const struct iattr *attrs)
217{
218 struct dentry *parent = dget_parent(dentry);
219 struct inode *dir = parent->d_inode;
220 struct nfs_server *server = NFS_SERVER(dir);
221 struct nfs4_opendata *p;
222
223 p = kzalloc(sizeof(*p), GFP_KERNEL);
224 if (p == NULL)
225 goto err;
226 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
227 if (p->o_arg.seqid == NULL)
228 goto err_free;
24ac23ab 229 atomic_set(&p->count, 1);
e56e0b78
TM		 230 p->dentry = dget(dentry);
231 p->dir = parent;
232 p->owner = sp;
233 atomic_inc(&sp->so_count);
234 p->o_arg.fh = NFS_FH(dir);
235 p->o_arg.open_flags = flags,
236 p->o_arg.clientid = server->nfs4_state->cl_clientid;
237 p->o_arg.id = sp->so_id;
238 p->o_arg.name = &dentry->d_name;
239 p->o_arg.server = server;
240 p->o_arg.bitmask = server->attr_bitmask;
241 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
242 p->o_res.f_attr = &p->f_attr;
243 p->o_res.dir_attr = &p->dir_attr;
244 p->o_res.server = server;
245 nfs_fattr_init(&p->f_attr);
246 nfs_fattr_init(&p->dir_attr);
247 if (flags & O_EXCL) {
248 u32 *s = (u32 *) p->o_arg.u.verifier.data;
249 s[0] = jiffies;
250 s[1] = current->pid;
251 } else if (flags & O_CREAT) {
252 p->o_arg.u.attrs = &p->attrs;
253 memcpy(&p->attrs, attrs, sizeof(p->attrs));
254 }
cdd4e68b
TM		 255 p->c_arg.fh = &p->o_res.fh;
256 p->c_arg.stateid = &p->o_res.stateid;
257 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 258 return p;
259err_free:
260 kfree(p);
261err:
262 dput(parent);
263 return NULL;
264}
265
266static void nfs4_opendata_free(struct nfs4_opendata *p)
267{
24ac23ab 268 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 269 nfs_free_seqid(p->o_arg.seqid);
270 nfs4_put_state_owner(p->owner);
271 dput(p->dir);
272 dput(p->dentry);
273 kfree(p);
274 }
275}
276
9512135d 277/* Helper for asynchronous RPC calls */
4ce70ada 278static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 279 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 280{
281 struct rpc_task *task;
282
963d8fe5 283 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 284 return -ENOMEM;
9512135d
TM		 285 rpc_execute(task);
286 return 0;
287}
288
06f814a3
TM		 289static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
290{
291 sigset_t oldset;
292 int ret;
293
294 rpc_clnt_sigmask(task->tk_client, &oldset);
295 ret = rpc_wait_for_completion_task(task);
296 rpc_clnt_sigunmask(task->tk_client, &oldset);
297 return ret;
298}
299
e7616923
TM		 300static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
301{
302 switch (open_flags) {
303 case FMODE_WRITE:
304 state->n_wronly++;
305 break;
306 case FMODE_READ:
307 state->n_rdonly++;
308 break;
309 case FMODE_READ|FMODE_WRITE:
310 state->n_rdwr++;
311 }
312}
313
1da177e4
LT		 314static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
315{
316 struct inode *inode = state->inode;
317
318 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 319 /* Protect against nfs4_find_state_byowner() */
ec073428 320 spin_lock(&state->owner->so_lock);
1da177e4 321 spin_lock(&inode->i_lock);
4cecb76f 322 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 323 update_open_stateflags(state, open_flags);
4cecb76f 324 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 325 spin_unlock(&inode->i_lock);
ec073428 326 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 327}
328
24ac23ab
TM		 329static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
330{
331 struct inode *inode;
332 struct nfs4_state *state = NULL;
333
334 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
335 goto out;
336 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
337 if (inode == NULL)
338 goto out;
339 state = nfs4_get_open_state(inode, data->owner);
340 if (state == NULL)
341 goto put_inode;
342 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
343put_inode:
344 iput(inode);
345out:
346 return state;
347}
348
864472e9
TM		 349static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
350{
351 struct nfs_inode *nfsi = NFS_I(state->inode);
352 struct nfs_open_context *ctx;
353
354 spin_lock(&state->inode->i_lock);
355 list_for_each_entry(ctx, &nfsi->open_files, list) {
356 if (ctx->state != state)
357 continue;
358 get_nfs_open_context(ctx);
359 spin_unlock(&state->inode->i_lock);
360 return ctx;
361 }
362 spin_unlock(&state->inode->i_lock);
363 return ERR_PTR(-ENOENT);
364}
365
366static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
367{
368 int ret;
369
370 opendata->o_arg.open_flags = openflags;
371 ret = _nfs4_proc_open(opendata);
372 if (ret != 0)
373 return ret;
374 memcpy(stateid->data, opendata->o_res.stateid.data,
375 sizeof(stateid->data));
376 return 0;
377}
378
379static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
380{
381 nfs4_stateid stateid;
382 struct nfs4_state *newstate;
383 int mode = 0;
384 int delegation = 0;
385 int ret;
386
387 /* memory barrier prior to reading state->n_* */
388 smp_rmb();
389 if (state->n_rdwr != 0) {
390 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
391 if (ret != 0)
392 return ret;
393 mode |= FMODE_READ|FMODE_WRITE;
394 if (opendata->o_res.delegation_type != 0)
395 delegation = opendata->o_res.delegation_type;
396 smp_rmb();
397 }
398 if (state->n_wronly != 0) {
399 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
400 if (ret != 0)
401 return ret;
402 mode |= FMODE_WRITE;
403 if (opendata->o_res.delegation_type != 0)
404 delegation = opendata->o_res.delegation_type;
405 smp_rmb();
406 }
407 if (state->n_rdonly != 0) {
408 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
409 if (ret != 0)
410 return ret;
411 mode |= FMODE_READ;
412 }
413 clear_bit(NFS_DELEGATED_STATE, &state->flags);
414 if (mode == 0)
415 return 0;
416 if (opendata->o_res.delegation_type == 0)
417 opendata->o_res.delegation_type = delegation;
418 opendata->o_arg.open_flags |= mode;
419 newstate = nfs4_opendata_to_nfs4_state(opendata);
420 if (newstate != NULL) {
421 if (opendata->o_res.delegation_type != 0) {
422 struct nfs_inode *nfsi = NFS_I(newstate->inode);
423 int delegation_flags = 0;
424 if (nfsi->delegation)
425 delegation_flags = nfsi->delegation->flags;
426 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
427 nfs_inode_set_delegation(newstate->inode,
428 opendata->owner->so_cred,
429 &opendata->o_res);
430 else
431 nfs_inode_reclaim_delegation(newstate->inode,
432 opendata->owner->so_cred,
433 &opendata->o_res);
434 }
435 nfs4_close_state(newstate, opendata->o_arg.open_flags);
436 }
437 if (newstate != state)
438 return -ESTALE;
439 return 0;
440}
441
1da177e4
LT		 442/*
443 * OPEN_RECLAIM:
444 * reclaim state on the server after a reboot.
1da177e4 445 */
864472e9 446static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 447{
864472e9
TM		 448 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
449 struct nfs4_opendata *opendata;
450 int delegation_type = 0;
1da177e4
LT		 451 int status;
452
453 if (delegation != NULL) {
454 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
455 memcpy(&state->stateid, &delegation->stateid,
456 sizeof(state->stateid));
457 set_bit(NFS_DELEGATED_STATE, &state->flags);
458 return 0;
459 }
864472e9 460 delegation_type = delegation->type;
1da177e4 461 }
864472e9
TM		 462 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
463 if (opendata == NULL)
cee54fc9 464 return -ENOMEM;
864472e9
TM		 465 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
466 opendata->o_arg.fh = NFS_FH(state->inode);
467 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
468 opendata->o_arg.u.delegation_type = delegation_type;
469 status = nfs4_open_recover(opendata, state);
470 nfs4_opendata_free(opendata);
1da177e4
LT		 471 return status;
472}
473
864472e9 474static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 475{
476 struct nfs_server *server = NFS_SERVER(state->inode);
477 struct nfs4_exception exception = { };
478 int err;
479 do {
864472e9 480 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 481 if (err != -NFS4ERR_DELAY)
482 break;
483 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 484 } while (exception.retry);
485 return err;
486}
487
864472e9
TM		 488static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
489{
490 struct nfs_open_context *ctx;
491 int ret;
492
493 ctx = nfs4_state_find_open_context(state);
494 if (IS_ERR(ctx))
495 return PTR_ERR(ctx);
496 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
497 put_nfs_open_context(ctx);
498 return ret;
499}
500
1da177e4
LT		 501static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
502{
503 struct nfs4_state_owner *sp = state->owner;
e56e0b78 504 struct nfs4_opendata *opendata;
864472e9 505 int ret;
1da177e4 506
1da177e4 507 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 508 return 0;
509 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 510 if (opendata == NULL)
864472e9 511 return -ENOMEM;
e56e0b78 512 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 513 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
514 sizeof(opendata->o_arg.u.delegation.data));
864472e9 515 ret = nfs4_open_recover(opendata, state);
e56e0b78 516 nfs4_opendata_free(opendata);
864472e9 517 return ret;
1da177e4
LT		 518}
519
520int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
521{
522 struct nfs4_exception exception = { };
523 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
524 int err;
525 do {
526 err = _nfs4_open_delegation_recall(dentry, state);
527 switch (err) {
528 case 0:
529 return err;
530 case -NFS4ERR_STALE_CLIENTID:
531 case -NFS4ERR_STALE_STATEID:
532 case -NFS4ERR_EXPIRED:
533 /* Don't recall a delegation if it was lost */
534 nfs4_schedule_state_recovery(server->nfs4_state);
535 return err;
536 }
537 err = nfs4_handle_exception(server, err, &exception);
538 } while (exception.retry);
539 return err;
540}
541
cdd4e68b 542static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 543{
cdd4e68b
TM		 544 struct nfs4_opendata *data = calldata;
545 struct rpc_message msg = {
546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
547 .rpc_argp = &data->c_arg,
548 .rpc_resp = &data->c_res,
549 .rpc_cred = data->owner->so_cred,
1da177e4 550 };
cdd4e68b
TM		 551 rpc_call_setup(task, &msg, 0);
552}
553
554static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
555{
556 struct nfs4_opendata *data = calldata;
557
558 data->rpc_status = task->tk_status;
559 if (RPC_ASSASSINATED(task))
560 return;
561 if (data->rpc_status == 0)
562 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
563 sizeof(data->o_res.stateid.data));
564 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
565 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
566}
567
568static void nfs4_open_confirm_release(void *calldata)
569{
570 struct nfs4_opendata *data = calldata;
571 struct nfs4_state *state = NULL;
572
573 /* If this request hasn't been cancelled, do nothing */
574 if (data->cancelled == 0)
575 goto out_free;
576 /* In case of error, no cleanup! */
577 if (data->rpc_status != 0)
578 goto out_free;
579 nfs_confirm_seqid(&data->owner->so_seqid, 0);
580 state = nfs4_opendata_to_nfs4_state(data);
581 if (state != NULL)
582 nfs4_close_state(state, data->o_arg.open_flags);
583out_free:
584 nfs4_opendata_free(data);
585}
586
587static const struct rpc_call_ops nfs4_open_confirm_ops = {
588 .rpc_call_prepare = nfs4_open_confirm_prepare,
589 .rpc_call_done = nfs4_open_confirm_done,
590 .rpc_release = nfs4_open_confirm_release,
591};
592
593/*
594 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
595 */
596static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
597{
598 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
599 struct rpc_task *task;
1da177e4
LT		 600 int status;
601
cdd4e68b
TM		 602 atomic_inc(&data->count);
603 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
604 if (IS_ERR(task)) {
605 nfs4_opendata_free(data);
606 return PTR_ERR(task);
607 }
608 status = nfs4_wait_for_completion_rpc_task(task);
609 if (status != 0) {
610 data->cancelled = 1;
611 smp_wmb();
612 } else
613 status = data->rpc_status;
614 rpc_release_task(task);
1da177e4
LT		 615 return status;
616}
617
24ac23ab 618static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 619{
24ac23ab
TM		 620 struct nfs4_opendata *data = calldata;
621 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 622 struct rpc_message msg = {
623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 624 .rpc_argp = &data->o_arg,
625 .rpc_resp = &data->o_res,
1da177e4
LT		 626 .rpc_cred = sp->so_cred,
627 };
24ac23ab
TM		 628
629 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
630 return;
631 /* Update sequence id. */
632 data->o_arg.id = sp->so_id;
633 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 634 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
635 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
24ac23ab
TM		 636 rpc_call_setup(task, &msg, 0);
637}
1da177e4 638
24ac23ab
TM		 639static void nfs4_open_done(struct rpc_task *task, void *calldata)
640{
641 struct nfs4_opendata *data = calldata;
1da177e4 642
24ac23ab
TM		 643 data->rpc_status = task->tk_status;
644 if (RPC_ASSASSINATED(task))
645 return;
646 if (task->tk_status == 0) {
647 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 648 case S_IFREG:
649 break;
650 case S_IFLNK:
24ac23ab 651 data->rpc_status = -ELOOP;
6f926b5b
TM		 652 break;
653 case S_IFDIR:
24ac23ab 654 data->rpc_status = -EISDIR;
6f926b5b
TM		 655 break;
656 default:
24ac23ab 657 data->rpc_status = -ENOTDIR;
6f926b5b
TM		 658 }
659 }
24ac23ab
TM		 660 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
661}
6f926b5b 662
24ac23ab
TM		 663static void nfs4_open_release(void *calldata)
664{
665 struct nfs4_opendata *data = calldata;
666 struct nfs4_state *state = NULL;
667
668 /* If this request hasn't been cancelled, do nothing */
669 if (data->cancelled == 0)
670 goto out_free;
671 /* In case of error, no cleanup! */
672 if (data->rpc_status != 0)
673 goto out_free;
674 /* In case we need an open_confirm, no cleanup! */
675 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
676 goto out_free;
677 nfs_confirm_seqid(&data->owner->so_seqid, 0);
678 state = nfs4_opendata_to_nfs4_state(data);
679 if (state != NULL)
680 nfs4_close_state(state, data->o_arg.open_flags);
681out_free:
682 nfs4_opendata_free(data);
683}
684
685static const struct rpc_call_ops nfs4_open_ops = {
686 .rpc_call_prepare = nfs4_open_prepare,
687 .rpc_call_done = nfs4_open_done,
688 .rpc_release = nfs4_open_release,
689};
690
691/*
692 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
693 */
694static int _nfs4_proc_open(struct nfs4_opendata *data)
695{
696 struct inode *dir = data->dir->d_inode;
697 struct nfs_server *server = NFS_SERVER(dir);
698 struct nfs_openargs *o_arg = &data->o_arg;
699 struct nfs_openres *o_res = &data->o_res;
700 struct rpc_task *task;
701 int status;
702
703 atomic_inc(&data->count);
704 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
705 if (IS_ERR(task)) {
706 nfs4_opendata_free(data);
707 return PTR_ERR(task);
708 }
709 status = nfs4_wait_for_completion_rpc_task(task);
710 if (status != 0) {
711 data->cancelled = 1;
712 smp_wmb();
713 } else
714 status = data->rpc_status;
715 rpc_release_task(task);
1da177e4 716 if (status != 0)
24ac23ab
TM		 717 return status;
718
56ae19f3
TM		 719 if (o_arg->open_flags & O_CREAT) {
720 update_changeattr(dir, &o_res->cinfo);
721 nfs_post_op_update_inode(dir, o_res->dir_attr);
722 } else
723 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 724 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 725 status = _nfs4_proc_open_confirm(data);
1da177e4 726 if (status != 0)
24ac23ab 727 return status;
1da177e4 728 }
24ac23ab 729 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 730 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
24ac23ab
TM		 731 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
732 return 0;
1da177e4
LT		 733}
734
735static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
736{
737 struct nfs_access_entry cache;
738 int mask = 0;
739 int status;
740
741 if (openflags & FMODE_READ)
742 mask |= MAY_READ;
743 if (openflags & FMODE_WRITE)
744 mask |= MAY_WRITE;
745 status = nfs_access_get_cached(inode, cred, &cache);
746 if (status == 0)
747 goto out;
748
749 /* Be clever: ask server to check for all possible rights */
750 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
751 cache.cred = cred;
752 cache.jiffies = jiffies;
753 status = _nfs4_proc_access(inode, &cache);
754 if (status != 0)
755 return status;
756 nfs_access_add_cache(inode, &cache);
757out:
758 if ((cache.mask & mask) == mask)
759 return 0;
760 return -EACCES;
761}
762
763/*
764 * OPEN_EXPIRED:
765 * reclaim state on the server after a network partition.
766 * Assumes caller holds the appropriate lock
767 */
768static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
769{
1da177e4 770 struct inode *inode = state->inode;
1da177e4 771 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 772 struct nfs4_opendata *opendata;
24ac23ab 773 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 774 int ret;
1da177e4
LT		 775
776 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 777 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
778 if (ret < 0)
779 return ret;
1da177e4
LT		 780 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
781 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 782 return 0;
1da177e4 783 }
24ac23ab 784 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 785 if (opendata == NULL)
864472e9
TM		 786 return -ENOMEM;
787 ret = nfs4_open_recover(opendata, state);
788 if (ret == -ESTALE) {
789 /* Invalidate the state owner so we don't ever use it again */
790 nfs4_drop_state_owner(sp);
791 d_drop(dentry);
1da177e4 792 }
e56e0b78 793 nfs4_opendata_free(opendata);
864472e9 794 return ret;
1da177e4
LT		 795}
796
202b50dc
TM		 797static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
798{
799 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
800 struct nfs4_exception exception = { };
801 int err;
802
803 do {
804 err = _nfs4_open_expired(sp, state, dentry);
805 if (err == -NFS4ERR_DELAY)
806 nfs4_handle_exception(server, err, &exception);
807 } while (exception.retry);
808 return err;
809}
810
1da177e4
LT		 811static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
812{
1da177e4 813 struct nfs_open_context *ctx;
864472e9 814 int ret;
1da177e4 815
864472e9
TM		 816 ctx = nfs4_state_find_open_context(state);
817 if (IS_ERR(ctx))
818 return PTR_ERR(ctx);
819 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
820 put_nfs_open_context(ctx);
821 return ret;
1da177e4
LT		 822}
823
824/*
24ac23ab 825 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 826 */
827static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
828{
829 struct nfs_delegation *delegation;
830 struct nfs_server *server = NFS_SERVER(inode);
831 struct nfs4_client *clp = server->nfs4_state;
832 struct nfs_inode *nfsi = NFS_I(inode);
833 struct nfs4_state_owner *sp = NULL;
834 struct nfs4_state *state = NULL;
835 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
836 int err;
837
838 /* Protect against reboot recovery - NOTE ORDER! */
839 down_read(&clp->cl_sem);
840 /* Protect against delegation recall */
841 down_read(&nfsi->rwsem);
842 delegation = NFS_I(inode)->delegation;
843 err = -ENOENT;
844 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
845 goto out_err;
846 err = -ENOMEM;
847 if (!(sp = nfs4_get_state_owner(server, cred))) {
848 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
849 goto out_err;
850 }
1da177e4
LT		 851 state = nfs4_get_open_state(inode, sp);
852 if (state == NULL)
853 goto out_err;
854
855 err = -ENOENT;
856 if ((state->state & open_flags) == open_flags) {
857 spin_lock(&inode->i_lock);
e7616923 858 update_open_stateflags(state, open_flags);
1da177e4
LT		 859 spin_unlock(&inode->i_lock);
860 goto out_ok;
861 } else if (state->state != 0)
862 goto out_err;
863
864 lock_kernel();
865 err = _nfs4_do_access(inode, cred, open_flags);
866 unlock_kernel();
867 if (err != 0)
868 goto out_err;
869 set_bit(NFS_DELEGATED_STATE, &state->flags);
870 update_open_stateid(state, &delegation->stateid, open_flags);
871out_ok:
1da177e4
LT		 872 nfs4_put_state_owner(sp);
873 up_read(&nfsi->rwsem);
874 up_read(&clp->cl_sem);
1da177e4
LT		 875 *res = state;
876 return 0;
877out_err:
878 if (sp != NULL) {
879 if (state != NULL)
880 nfs4_put_open_state(state);
1da177e4
LT		 881 nfs4_put_state_owner(sp);
882 }
883 up_read(&nfsi->rwsem);
884 up_read(&clp->cl_sem);
b8e5c4c2
TM		 885 if (err != -EACCES)
886 nfs_inode_return_delegation(inode);
1da177e4
LT		 887 return err;
888}
889
890static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
891{
892 struct nfs4_exception exception = { };
893 struct nfs4_state *res;
894 int err;
895
896 do {
897 err = _nfs4_open_delegated(inode, flags, cred, &res);
898 if (err == 0)
899 break;
900 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
901 err, &exception));
902 } while (exception.retry);
903 return res;
904}
905
906/*
24ac23ab 907 * Returns a referenced nfs4_state
1da177e4
LT		 908 */
909static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
910{
911 struct nfs4_state_owner *sp;
912 struct nfs4_state *state = NULL;
913 struct nfs_server *server = NFS_SERVER(dir);
914 struct nfs4_client *clp = server->nfs4_state;
e56e0b78 915 struct nfs4_opendata *opendata;
1da177e4 916 int status;
1da177e4
LT		 917
918 /* Protect against reboot recovery conflicts */
919 down_read(&clp->cl_sem);
920 status = -ENOMEM;
921 if (!(sp = nfs4_get_state_owner(server, cred))) {
922 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
923 goto out_err;
924 }
e56e0b78
TM		 925 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
926 if (opendata == NULL)
927 goto err_put_state_owner;
1da177e4 928
24ac23ab 929 status = _nfs4_proc_open(opendata);
1da177e4 930 if (status != 0)
e56e0b78 931 goto err_opendata_free;
1da177e4
LT		 932
933 status = -ENOMEM;
24ac23ab
TM		 934 state = nfs4_opendata_to_nfs4_state(opendata);
935 if (state == NULL)
e56e0b78 936 goto err_opendata_free;
e56e0b78 937 if (opendata->o_res.delegation_type != 0)
24ac23ab 938 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 939 nfs4_opendata_free(opendata);
1da177e4
LT		 940 nfs4_put_state_owner(sp);
941 up_read(&clp->cl_sem);
942 *res = state;
943 return 0;
e56e0b78
TM		 944err_opendata_free:
945 nfs4_opendata_free(opendata);
946err_put_state_owner:
947 nfs4_put_state_owner(sp);
1da177e4 948out_err:
1da177e4
LT		 949 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
950 up_read(&clp->cl_sem);
1da177e4
LT		 951 *res = NULL;
952 return status;
953}
954
955
956static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
957{
958 struct nfs4_exception exception = { };
959 struct nfs4_state *res;
960 int status;
961
962 do {
963 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
964 if (status == 0)
965 break;
966 /* NOTE: BAD_SEQID means the server and client disagree about the
967 * book-keeping w.r.t. state-changing operations
968 * (OPEN/CLOSE/LOCK/LOCKU...)
969 * It is actually a sign of a bug on the client or on the server.
970 *
971 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 972 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 973 * have unhashed the old state_owner for us, and that we can
974 * therefore safely retry using a new one. We should still warn
975 * the user though...
976 */
977 if (status == -NFS4ERR_BAD_SEQID) {
978 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
979 exception.retry = 1;
980 continue;
981 }
550f5747
TM		 982 /*
983 * BAD_STATEID on OPEN means that the server cancelled our
984 * state before it received the OPEN_CONFIRM.
985 * Recover by retrying the request as per the discussion
986 * on Page 181 of RFC3530.
987 */
988 if (status == -NFS4ERR_BAD_STATEID) {
989 exception.retry = 1;
990 continue;
991 }
1da177e4
LT		 992 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
993 status, &exception));
994 } while (exception.retry);
995 return res;
996}
997
998static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
999 struct nfs_fh *fhandle, struct iattr *sattr,
1000 struct nfs4_state *state)
1001{
1002 struct nfs_setattrargs arg = {
1003 .fh = fhandle,
1004 .iap = sattr,
1005 .server = server,
1006 .bitmask = server->attr_bitmask,
1007 };
1008 struct nfs_setattrres res = {
1009 .fattr = fattr,
1010 .server = server,
1011 };
1012 struct rpc_message msg = {
1013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1014 .rpc_argp = &arg,
1015 .rpc_resp = &res,
1016 };
65e4308d 1017 int status;
1da177e4 1018
0e574af1 1019 nfs_fattr_init(fattr);
1da177e4 1020
08e9eac4 1021 if (state != NULL) {
1da177e4 1022 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1023 nfs4_copy_stateid(&arg.stateid, state, current->files);
1024 } else
1da177e4
LT		 1025 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1026
65e4308d
TM		 1027 status = rpc_call_sync(server->client, &msg, 0);
1028 return status;
1da177e4
LT		 1029}
1030
1031static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
1032 struct nfs_fh *fhandle, struct iattr *sattr,
1033 struct nfs4_state *state)
1034{
1035 struct nfs4_exception exception = { };
1036 int err;
1037 do {
1038 err = nfs4_handle_exception(server,
1039 _nfs4_do_setattr(server, fattr, fhandle, sattr,
1040 state),
1041 &exception);
1042 } while (exception.retry);
1043 return err;
1044}
1045
1046struct nfs4_closedata {
1047 struct inode *inode;
1048 struct nfs4_state *state;
1049 struct nfs_closeargs arg;
1050 struct nfs_closeres res;
516a6af6 1051 struct nfs_fattr fattr;
1da177e4
LT		 1052};
1053
963d8fe5 1054static void nfs4_free_closedata(void *data)
9512135d 1055{
963d8fe5
TM		 1056 struct nfs4_closedata *calldata = data;
1057 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1058
1059 nfs4_put_open_state(calldata->state);
1060 nfs_free_seqid(calldata->arg.seqid);
9512135d 1061 nfs4_put_state_owner(sp);
9512135d
TM		 1062 kfree(calldata);
1063}
1064
963d8fe5 1065static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1066{
963d8fe5 1067 struct nfs4_closedata *calldata = data;
1da177e4 1068 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1069 struct nfs_server *server = NFS_SERVER(calldata->inode);
1070
4ce70ada
TM		 1071 if (RPC_ASSASSINATED(task))
1072 return;
1da177e4
LT		 1073 /* hmm. we are done with the inode, and in the process of freeing
1074 * the state_owner. we keep this around to process errors
1075 */
cee54fc9 1076 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1077 switch (task->tk_status) {
1078 case 0:
1079 memcpy(&state->stateid, &calldata->res.stateid,
1080 sizeof(state->stateid));
1081 break;
1082 case -NFS4ERR_STALE_STATEID:
1083 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1084 nfs4_schedule_state_recovery(server->nfs4_state);
1085 break;
1086 default:
1087 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1088 rpc_restart_call(task);
1089 return;
1090 }
1091 }
516a6af6 1092 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1093}
1094
4ce70ada 1095static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1096{
4ce70ada 1097 struct nfs4_closedata *calldata = data;
9512135d 1098 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1099 struct rpc_message msg = {
1100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1101 .rpc_argp = &calldata->arg,
1102 .rpc_resp = &calldata->res,
9512135d 1103 .rpc_cred = state->owner->so_cred,
1da177e4 1104 };
4cecb76f 1105 int mode = 0, old_mode;
9512135d 1106
963d8fe5 1107 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1108 return;
9512135d
TM		 1109 /* Recalculate the new open mode in case someone reopened the file
1110 * while we were waiting in line to be scheduled.
1111 */
4cecb76f
TM		 1112 spin_lock(&state->owner->so_lock);
1113 spin_lock(&calldata->inode->i_lock);
1114 mode = old_mode = state->state;
e7616923
TM		 1115 if (state->n_rdwr == 0) {
1116 if (state->n_rdonly == 0)
1117 mode &= ~FMODE_READ;
1118 if (state->n_wronly == 0)
1119 mode &= ~FMODE_WRITE;
1120 }
4cecb76f
TM		 1121 nfs4_state_set_mode_locked(state, mode);
1122 spin_unlock(&calldata->inode->i_lock);
1123 spin_unlock(&state->owner->so_lock);
1124 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1125 /* Note: exit _without_ calling nfs4_close_done */
1126 task->tk_action = NULL;
9512135d
TM		 1127 return;
1128 }
516a6af6 1129 nfs_fattr_init(calldata->res.fattr);
9512135d 1130 if (mode != 0)
1da177e4 1131 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d
TM		 1132 calldata->arg.open_flags = mode;
1133 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1134}
1135
963d8fe5 1136static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1137 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1138 .rpc_call_done = nfs4_close_done,
1139 .rpc_release = nfs4_free_closedata,
1140};
1141
1da177e4
LT		 1142/*
1143 * It is possible for data to be read/written from a mem-mapped file
1144 * after the sys_close call (which hits the vfs layer as a flush).
1145 * This means that we can't safely call nfsv4 close on a file until
1146 * the inode is cleared. This in turn means that we are not good
1147 * NFSv4 citizens - we do not indicate to the server to update the file's
1148 * share state even when we are done with one of the three share
1149 * stateid's in the inode.
1150 *
1151 * NOTE: Caller must be holding the sp->so_owner semaphore!
1152 */
4cecb76f 1153int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1154{
516a6af6 1155 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1156 struct nfs4_closedata *calldata;
9512135d 1157 int status = -ENOMEM;
1da177e4 1158
9512135d 1159 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1160 if (calldata == NULL)
9512135d 1161 goto out;
1da177e4
LT		 1162 calldata->inode = inode;
1163 calldata->state = state;
1164 calldata->arg.fh = NFS_FH(inode);
9512135d 1165 calldata->arg.stateid = &state->stateid;
1da177e4 1166 /* Serialization for the sequence id */
cee54fc9 1167 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1168 if (calldata->arg.seqid == NULL)
1169 goto out_free_calldata;
516a6af6
TM		 1170 calldata->arg.bitmask = server->attr_bitmask;
1171 calldata->res.fattr = &calldata->fattr;
1172 calldata->res.server = server;
9512135d 1173
4ce70ada 1174 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1175 if (status == 0)
1176 goto out;
1177
1178 nfs_free_seqid(calldata->arg.seqid);
1179out_free_calldata:
1180 kfree(calldata);
1181out:
1182 return status;
1da177e4
LT		 1183}
1184
02a913a7
TM		 1185static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1186{
1187 struct file *filp;
1188
1189 filp = lookup_instantiate_filp(nd, dentry, NULL);
1190 if (!IS_ERR(filp)) {
1191 struct nfs_open_context *ctx;
1192 ctx = (struct nfs_open_context *)filp->private_data;
1193 ctx->state = state;
1194 } else
1195 nfs4_close_state(state, nd->intent.open.flags);
1196}
1197
1198struct dentry *
1da177e4
LT		 1199nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1200{
1201 struct iattr attr;
1202 struct rpc_cred *cred;
1203 struct nfs4_state *state;
02a913a7 1204 struct dentry *res;
1da177e4
LT		 1205
1206 if (nd->flags & LOOKUP_CREATE) {
1207 attr.ia_mode = nd->intent.open.create_mode;
1208 attr.ia_valid = ATTR_MODE;
1209 if (!IS_POSIXACL(dir))
1210 attr.ia_mode &= ~current->fs->umask;
1211 } else {
1212 attr.ia_valid = 0;
1213 BUG_ON(nd->intent.open.flags & O_CREAT);
1214 }
1215
1216 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1217 if (IS_ERR(cred))
02a913a7 1218 return (struct dentry *)cred;
1da177e4
LT		 1219 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1220 put_rpccred(cred);
02a913a7
TM		 1221 if (IS_ERR(state)) {
1222 if (PTR_ERR(state) == -ENOENT)
1223 d_add(dentry, NULL);
1224 return (struct dentry *)state;
1225 }
24ac23ab 1226 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1227 if (res != NULL)
1228 dentry = res;
1229 nfs4_intent_set_file(nd, dentry, state);
1230 return res;
1da177e4
LT		 1231}
1232
1233int
02a913a7 1234nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1235{
1236 struct rpc_cred *cred;
1237 struct nfs4_state *state;
1da177e4
LT		 1238
1239 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1240 if (IS_ERR(cred))
1241 return PTR_ERR(cred);
1242 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1243 if (IS_ERR(state))
1244 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1245 put_rpccred(cred);
02a913a7
TM		 1246 if (IS_ERR(state)) {
1247 switch (PTR_ERR(state)) {
1248 case -EPERM:
1249 case -EACCES:
1250 case -EDQUOT:
1251 case -ENOSPC:
1252 case -EROFS:
1253 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1254 return 1;
1255 case -ENOENT:
1256 if (dentry->d_inode == NULL)
1257 return 1;
1258 }
1259 goto out_drop;
1260 }
24ac23ab 1261 if (state->inode == dentry->d_inode) {
02a913a7 1262 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1263 return 1;
1264 }
1da177e4 1265 nfs4_close_state(state, openflags);
02a913a7
TM		 1266out_drop:
1267 d_drop(dentry);
1da177e4
LT		 1268 return 0;
1269}
1270
1271
1272static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1273{
1274 struct nfs4_server_caps_res res = {};
1275 struct rpc_message msg = {
1276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1277 .rpc_argp = fhandle,
1278 .rpc_resp = &res,
1279 };
1280 int status;
1281
1282 status = rpc_call_sync(server->client, &msg, 0);
1283 if (status == 0) {
1284 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1285 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1286 server->caps |= NFS_CAP_ACLS;
1287 if (res.has_links != 0)
1288 server->caps |= NFS_CAP_HARDLINKS;
1289 if (res.has_symlinks != 0)
1290 server->caps |= NFS_CAP_SYMLINKS;
1291 server->acl_bitmask = res.acl_bitmask;
1292 }
1293 return status;
1294}
1295
1296static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1297{
1298 struct nfs4_exception exception = { };
1299 int err;
1300 do {
1301 err = nfs4_handle_exception(server,
1302 _nfs4_server_capabilities(server, fhandle),
1303 &exception);
1304 } while (exception.retry);
1305 return err;
1306}
1307
1308static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1309 struct nfs_fsinfo *info)
1310{
1da177e4
LT		 1311 struct nfs4_lookup_root_arg args = {
1312 .bitmask = nfs4_fattr_bitmap,
1313 };
1314 struct nfs4_lookup_res res = {
1315 .server = server,
0e574af1 1316 .fattr = info->fattr,
1da177e4
LT		 1317 .fh = fhandle,
1318 };
1319 struct rpc_message msg = {
1320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1321 .rpc_argp = &args,
1322 .rpc_resp = &res,
1323 };
0e574af1 1324 nfs_fattr_init(info->fattr);
1da177e4
LT		 1325 return rpc_call_sync(server->client, &msg, 0);
1326}
1327
1328static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1329 struct nfs_fsinfo *info)
1330{
1331 struct nfs4_exception exception = { };
1332 int err;
1333 do {
1334 err = nfs4_handle_exception(server,
1335 _nfs4_lookup_root(server, fhandle, info),
1336 &exception);
1337 } while (exception.retry);
1338 return err;
1339}
1340
1341static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1342 struct nfs_fsinfo *info)
1343{
1344 struct nfs_fattr * fattr = info->fattr;
1345 unsigned char * p;
1346 struct qstr q;
1347 struct nfs4_lookup_arg args = {
1348 .dir_fh = fhandle,
1349 .name = &q,
1350 .bitmask = nfs4_fattr_bitmap,
1351 };
1352 struct nfs4_lookup_res res = {
1353 .server = server,
1354 .fattr = fattr,
1355 .fh = fhandle,
1356 };
1357 struct rpc_message msg = {
1358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1359 .rpc_argp = &args,
1360 .rpc_resp = &res,
1361 };
1362 int status;
1363
1364 /*
1365 * Now we do a separate LOOKUP for each component of the mount path.
1366 * The LOOKUPs are done separately so that we can conveniently
1367 * catch an ERR_WRONGSEC if it occurs along the way...
1368 */
1369 status = nfs4_lookup_root(server, fhandle, info);
1370 if (status)
1371 goto out;
1372
1373 p = server->mnt_path;
1374 for (;;) {
1375 struct nfs4_exception exception = { };
1376
1377 while (*p == '/')
1378 p++;
1379 if (!*p)
1380 break;
1381 q.name = p;
1382 while (*p && (*p != '/'))
1383 p++;
1384 q.len = p - q.name;
1385
1386 do {
0e574af1 1387 nfs_fattr_init(fattr);
1da177e4
LT		 1388 status = nfs4_handle_exception(server,
1389 rpc_call_sync(server->client, &msg, 0),
1390 &exception);
1391 } while (exception.retry);
1392 if (status == 0)
1393 continue;
1394 if (status == -ENOENT) {
1395 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1396 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1397 }
1398 break;
1399 }
1400 if (status == 0)
1401 status = nfs4_server_capabilities(server, fhandle);
1402 if (status == 0)
1403 status = nfs4_do_fsinfo(server, fhandle, info);
1404out:
1405 return status;
1406}
1407
1408static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1409{
1410 struct nfs4_getattr_arg args = {
1411 .fh = fhandle,
1412 .bitmask = server->attr_bitmask,
1413 };
1414 struct nfs4_getattr_res res = {
1415 .fattr = fattr,
1416 .server = server,
1417 };
1418 struct rpc_message msg = {
1419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1420 .rpc_argp = &args,
1421 .rpc_resp = &res,
1422 };
1423
0e574af1 1424 nfs_fattr_init(fattr);
1da177e4
LT		 1425 return rpc_call_sync(server->client, &msg, 0);
1426}
1427
1428static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1429{
1430 struct nfs4_exception exception = { };
1431 int err;
1432 do {
1433 err = nfs4_handle_exception(server,
1434 _nfs4_proc_getattr(server, fhandle, fattr),
1435 &exception);
1436 } while (exception.retry);
1437 return err;
1438}
1439
1440/*
1441 * The file is not closed if it is opened due to the a request to change
1442 * the size of the file. The open call will not be needed once the
1443 * VFS layer lookup-intents are implemented.
1444 *
1445 * Close is called when the inode is destroyed.
1446 * If we haven't opened the file for O_WRONLY, we
1447 * need to in the size_change case to obtain a stateid.
1448 *
1449 * Got race?
1450 * Because OPEN is always done by name in nfsv4, it is
1451 * possible that we opened a different file by the same
1452 * name. We can recognize this race condition, but we
1453 * can't do anything about it besides returning an error.
1454 *
1455 * This will be fixed with VFS changes (lookup-intent).
1456 */
1457static int
1458nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1459 struct iattr *sattr)
1460{
08e9eac4
TM		 1461 struct rpc_cred *cred;
1462 struct inode *inode = dentry->d_inode;
d530838b
TM		 1463 struct nfs_open_context *ctx;
1464 struct nfs4_state *state = NULL;
1da177e4
LT		 1465 int status;
1466
0e574af1 1467 nfs_fattr_init(fattr);
1da177e4 1468
08e9eac4
TM		 1469 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1470 if (IS_ERR(cred))
1471 return PTR_ERR(cred);
d530838b
TM		 1472
1473 /* Search for an existing open(O_WRITE) file */
1474 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1475 if (ctx != NULL)
1476 state = ctx->state;
08e9eac4 1477
1da177e4
LT		 1478 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1479 NFS_FH(inode), sattr, state);
65e4308d
TM		 1480 if (status == 0)
1481 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1482 if (ctx != NULL)
1483 put_nfs_open_context(ctx);
08e9eac4 1484 put_rpccred(cred);
1da177e4
LT		 1485 return status;
1486}
1487
1488static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1489 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1490{
1491 int status;
1492 struct nfs_server *server = NFS_SERVER(dir);
1493 struct nfs4_lookup_arg args = {
1494 .bitmask = server->attr_bitmask,
1495 .dir_fh = NFS_FH(dir),
1496 .name = name,
1497 };
1498 struct nfs4_lookup_res res = {
1499 .server = server,
1500 .fattr = fattr,
1501 .fh = fhandle,
1502 };
1503 struct rpc_message msg = {
1504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1505 .rpc_argp = &args,
1506 .rpc_resp = &res,
1507 };
1508
0e574af1 1509 nfs_fattr_init(fattr);
1da177e4
LT		 1510
1511 dprintk("NFS call lookup %s\n", name->name);
1512 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1513 dprintk("NFS reply lookup: %d\n", status);
1514 return status;
1515}
1516
1517static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1518{
1519 struct nfs4_exception exception = { };
1520 int err;
1521 do {
1522 err = nfs4_handle_exception(NFS_SERVER(dir),
1523 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1524 &exception);
1525 } while (exception.retry);
1526 return err;
1527}
1528
1529static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1530{
1531 struct nfs4_accessargs args = {
1532 .fh = NFS_FH(inode),
1533 };
1534 struct nfs4_accessres res = { 0 };
1535 struct rpc_message msg = {
1536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1537 .rpc_argp = &args,
1538 .rpc_resp = &res,
1539 .rpc_cred = entry->cred,
1540 };
1541 int mode = entry->mask;
1542 int status;
1543
1544 /*
1545 * Determine which access bits we want to ask for...
1546 */
1547 if (mode & MAY_READ)
1548 args.access |= NFS4_ACCESS_READ;
1549 if (S_ISDIR(inode->i_mode)) {
1550 if (mode & MAY_WRITE)
1551 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1552 if (mode & MAY_EXEC)
1553 args.access |= NFS4_ACCESS_LOOKUP;
1554 } else {
1555 if (mode & MAY_WRITE)
1556 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1557 if (mode & MAY_EXEC)
1558 args.access |= NFS4_ACCESS_EXECUTE;
1559 }
1560 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1561 if (!status) {
1562 entry->mask = 0;
1563 if (res.access & NFS4_ACCESS_READ)
1564 entry->mask |= MAY_READ;
1565 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1566 entry->mask |= MAY_WRITE;
1567 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1568 entry->mask |= MAY_EXEC;
1569 }
1570 return status;
1571}
1572
1573static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1574{
1575 struct nfs4_exception exception = { };
1576 int err;
1577 do {
1578 err = nfs4_handle_exception(NFS_SERVER(inode),
1579 _nfs4_proc_access(inode, entry),
1580 &exception);
1581 } while (exception.retry);
1582 return err;
1583}
1584
1585/*
1586 * TODO: For the time being, we don't try to get any attributes
1587 * along with any of the zero-copy operations READ, READDIR,
1588 * READLINK, WRITE.
1589 *
1590 * In the case of the first three, we want to put the GETATTR
1591 * after the read-type operation -- this is because it is hard
1592 * to predict the length of a GETATTR response in v4, and thus
1593 * align the READ data correctly. This means that the GETATTR
1594 * may end up partially falling into the page cache, and we should
1595 * shift it into the 'tail' of the xdr_buf before processing.
1596 * To do this efficiently, we need to know the total length
1597 * of data received, which doesn't seem to be available outside
1598 * of the RPC layer.
1599 *
1600 * In the case of WRITE, we also want to put the GETATTR after
1601 * the operation -- in this case because we want to make sure
1602 * we get the post-operation mtime and size. This means that
1603 * we can't use xdr_encode_pages() as written: we need a variant
1604 * of it which would leave room in the 'tail' iovec.
1605 *
1606 * Both of these changes to the XDR layer would in fact be quite
1607 * minor, but I decided to leave them for a subsequent patch.
1608 */
1609static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1610 unsigned int pgbase, unsigned int pglen)
1611{
1612 struct nfs4_readlink args = {
1613 .fh = NFS_FH(inode),
1614 .pgbase = pgbase,
1615 .pglen = pglen,
1616 .pages = &page,
1617 };
1618 struct rpc_message msg = {
1619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1620 .rpc_argp = &args,
1621 .rpc_resp = NULL,
1622 };
1623
1624 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1625}
1626
1627static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1628 unsigned int pgbase, unsigned int pglen)
1629{
1630 struct nfs4_exception exception = { };
1631 int err;
1632 do {
1633 err = nfs4_handle_exception(NFS_SERVER(inode),
1634 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1635 &exception);
1636 } while (exception.retry);
1637 return err;
1638}
1639
1640static int _nfs4_proc_read(struct nfs_read_data *rdata)
1641{
1642 int flags = rdata->flags;
1643 struct inode *inode = rdata->inode;
1644 struct nfs_fattr *fattr = rdata->res.fattr;
1645 struct nfs_server *server = NFS_SERVER(inode);
1646 struct rpc_message msg = {
1647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1648 .rpc_argp = &rdata->args,
1649 .rpc_resp = &rdata->res,
1650 .rpc_cred = rdata->cred,
1651 };
1652 unsigned long timestamp = jiffies;
1653 int status;
1654
1655 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1656 (long long) rdata->args.offset);
1657
0e574af1 1658 nfs_fattr_init(fattr);
1da177e4
LT		 1659 status = rpc_call_sync(server->client, &msg, flags);
1660 if (!status)
1661 renew_lease(server, timestamp);
1662 dprintk("NFS reply read: %d\n", status);
1663 return status;
1664}
1665
1666static int nfs4_proc_read(struct nfs_read_data *rdata)
1667{
1668 struct nfs4_exception exception = { };
1669 int err;
1670 do {
1671 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1672 _nfs4_proc_read(rdata),
1673 &exception);
1674 } while (exception.retry);
1675 return err;
1676}
1677
1678static int _nfs4_proc_write(struct nfs_write_data *wdata)
1679{
1680 int rpcflags = wdata->flags;
1681 struct inode *inode = wdata->inode;
1682 struct nfs_fattr *fattr = wdata->res.fattr;
1683 struct nfs_server *server = NFS_SERVER(inode);
1684 struct rpc_message msg = {
1685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1686 .rpc_argp = &wdata->args,
1687 .rpc_resp = &wdata->res,
1688 .rpc_cred = wdata->cred,
1689 };
1690 int status;
1691
1692 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1693 (long long) wdata->args.offset);
1694
3b6efee9
TM		 1695 wdata->args.bitmask = server->attr_bitmask;
1696 wdata->res.server = server;
0e574af1 1697 nfs_fattr_init(fattr);
1da177e4
LT		 1698 status = rpc_call_sync(server->client, &msg, rpcflags);
1699 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1700 if (status < 0)
1701 return status;
1702 nfs_post_op_update_inode(inode, fattr);
1703 return wdata->res.count;
1da177e4
LT		 1704}
1705
1706static int nfs4_proc_write(struct nfs_write_data *wdata)
1707{
1708 struct nfs4_exception exception = { };
1709 int err;
1710 do {
1711 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1712 _nfs4_proc_write(wdata),
1713 &exception);
1714 } while (exception.retry);
1715 return err;
1716}
1717
1718static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1719{
1720 struct inode *inode = cdata->inode;
1721 struct nfs_fattr *fattr = cdata->res.fattr;
1722 struct nfs_server *server = NFS_SERVER(inode);
1723 struct rpc_message msg = {
1724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1725 .rpc_argp = &cdata->args,
1726 .rpc_resp = &cdata->res,
1727 .rpc_cred = cdata->cred,
1728 };
1729 int status;
1730
1731 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1732 (long long) cdata->args.offset);
1733
3b6efee9
TM		 1734 cdata->args.bitmask = server->attr_bitmask;
1735 cdata->res.server = server;
0e574af1 1736 nfs_fattr_init(fattr);
1da177e4
LT		 1737 status = rpc_call_sync(server->client, &msg, 0);
1738 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1739 if (status >= 0)
1740 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1741 return status;
1742}
1743
1744static int nfs4_proc_commit(struct nfs_write_data *cdata)
1745{
1746 struct nfs4_exception exception = { };
1747 int err;
1748 do {
1749 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1750 _nfs4_proc_commit(cdata),
1751 &exception);
1752 } while (exception.retry);
1753 return err;
1754}
1755
1756/*
1757 * Got race?
1758 * We will need to arrange for the VFS layer to provide an atomic open.
1759 * Until then, this create/open method is prone to inefficiency and race
1760 * conditions due to the lookup, create, and open VFS calls from sys_open()
1761 * placed on the wire.
1762 *
1763 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1764 * The file will be opened again in the subsequent VFS open call
1765 * (nfs4_proc_file_open).
1766 *
1767 * The open for read will just hang around to be used by any process that
1768 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1769 */
1770
1771static int
1772nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1773 int flags, struct nameidata *nd)
1da177e4
LT		 1774{
1775 struct nfs4_state *state;
1776 struct rpc_cred *cred;
1777 int status = 0;
1778
1779 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1780 if (IS_ERR(cred)) {
1781 status = PTR_ERR(cred);
1782 goto out;
1783 }
1784 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1785 put_rpccred(cred);
1786 if (IS_ERR(state)) {
1787 status = PTR_ERR(state);
1788 goto out;
1789 }
24ac23ab 1790 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1791 if (flags & O_EXCL) {
1792 struct nfs_fattr fattr;
1793 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1794 NFS_FH(state->inode), sattr, state);
02a913a7 1795 if (status == 0)
65e4308d 1796 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1797 }
1798 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1799 nfs4_intent_set_file(nd, dentry, state);
1800 else
1801 nfs4_close_state(state, flags);
1da177e4
LT		 1802out:
1803 return status;
1804}
1805
1806static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1807{
16e42959 1808 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1809 struct nfs4_remove_arg args = {
1810 .fh = NFS_FH(dir),
1811 .name = name,
16e42959
TM		 1812 .bitmask = server->attr_bitmask,
1813 };
1814 struct nfs_fattr dir_attr;
1815 struct nfs4_remove_res res = {
1816 .server = server,
1817 .dir_attr = &dir_attr,
1da177e4 1818 };
1da177e4
LT		 1819 struct rpc_message msg = {
1820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1821 .rpc_argp = &args,
1822 .rpc_resp = &res,
1823 };
1824 int status;
1825
16e42959
TM		 1826 nfs_fattr_init(res.dir_attr);
1827 status = rpc_call_sync(server->client, &msg, 0);
1828 if (status == 0) {
1829 update_changeattr(dir, &res.cinfo);
1830 nfs_post_op_update_inode(dir, res.dir_attr);
1831 }
1da177e4
LT		 1832 return status;
1833}
1834
1835static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1836{
1837 struct nfs4_exception exception = { };
1838 int err;
1839 do {
1840 err = nfs4_handle_exception(NFS_SERVER(dir),
1841 _nfs4_proc_remove(dir, name),
1842 &exception);
1843 } while (exception.retry);
1844 return err;
1845}
1846
1847struct unlink_desc {
1848 struct nfs4_remove_arg args;
16e42959
TM		 1849 struct nfs4_remove_res res;
1850 struct nfs_fattr dir_attr;
1da177e4
LT		 1851};
1852
1853static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1854 struct qstr *name)
1855{
16e42959 1856 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1857 struct unlink_desc *up;
1858
1859 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1860 if (!up)
1861 return -ENOMEM;
1862
1863 up->args.fh = NFS_FH(dir->d_inode);
1864 up->args.name = name;
16e42959
TM		 1865 up->args.bitmask = server->attr_bitmask;
1866 up->res.server = server;
1867 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1868
1869 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1870 msg->rpc_argp = &up->args;
1871 msg->rpc_resp = &up->res;
1872 return 0;
1873}
1874
1875static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1876{
1877 struct rpc_message *msg = &task->tk_msg;
1878 struct unlink_desc *up;
1879
1880 if (msg->rpc_resp != NULL) {
1881 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1882 update_changeattr(dir->d_inode, &up->res.cinfo);
1883 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1884 kfree(up);
1885 msg->rpc_resp = NULL;
1886 msg->rpc_argp = NULL;
1887 }
1888 return 0;
1889}
1890
1891static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1892 struct inode *new_dir, struct qstr *new_name)
1893{
6caf2c82 1894 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1895 struct nfs4_rename_arg arg = {
1896 .old_dir = NFS_FH(old_dir),
1897 .new_dir = NFS_FH(new_dir),
1898 .old_name = old_name,
1899 .new_name = new_name,
6caf2c82
TM		 1900 .bitmask = server->attr_bitmask,
1901 };
1902 struct nfs_fattr old_fattr, new_fattr;
1903 struct nfs4_rename_res res = {
1904 .server = server,
1905 .old_fattr = &old_fattr,
1906 .new_fattr = &new_fattr,
1da177e4 1907 };
1da177e4
LT		 1908 struct rpc_message msg = {
1909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1910 .rpc_argp = &arg,
1911 .rpc_resp = &res,
1912 };
1913 int status;
1914
6caf2c82
TM		 1915 nfs_fattr_init(res.old_fattr);
1916 nfs_fattr_init(res.new_fattr);
1917 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1918
1919 if (!status) {
1920 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1921 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1922 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1923 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1924 }
1925 return status;
1926}
1927
1928static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1929 struct inode *new_dir, struct qstr *new_name)
1930{
1931 struct nfs4_exception exception = { };
1932 int err;
1933 do {
1934 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1935 _nfs4_proc_rename(old_dir, old_name,
1936 new_dir, new_name),
1937 &exception);
1938 } while (exception.retry);
1939 return err;
1940}
1941
1942static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1943{
91ba2eee 1944 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1945 struct nfs4_link_arg arg = {
1946 .fh = NFS_FH(inode),
1947 .dir_fh = NFS_FH(dir),
1948 .name = name,
91ba2eee
TM		 1949 .bitmask = server->attr_bitmask,
1950 };
1951 struct nfs_fattr fattr, dir_attr;
1952 struct nfs4_link_res res = {
1953 .server = server,
1954 .fattr = &fattr,
1955 .dir_attr = &dir_attr,
1da177e4 1956 };
1da177e4
LT		 1957 struct rpc_message msg = {
1958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1959 .rpc_argp = &arg,
91ba2eee 1960 .rpc_resp = &res,
1da177e4
LT		 1961 };
1962 int status;
1963
91ba2eee
TM		 1964 nfs_fattr_init(res.fattr);
1965 nfs_fattr_init(res.dir_attr);
1966 status = rpc_call_sync(server->client, &msg, 0);
1967 if (!status) {
1968 update_changeattr(dir, &res.cinfo);
1969 nfs_post_op_update_inode(dir, res.dir_attr);
1970 nfs_refresh_inode(inode, res.fattr);
1971 }
1da177e4
LT		 1972
1973 return status;
1974}
1975
1976static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1977{
1978 struct nfs4_exception exception = { };
1979 int err;
1980 do {
1981 err = nfs4_handle_exception(NFS_SERVER(inode),
1982 _nfs4_proc_link(inode, dir, name),
1983 &exception);
1984 } while (exception.retry);
1985 return err;
1986}
1987
1988static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1989 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1990 struct nfs_fattr *fattr)
1991{
1992 struct nfs_server *server = NFS_SERVER(dir);
56ae19f3 1993 struct nfs_fattr dir_fattr;
1da177e4
LT		 1994 struct nfs4_create_arg arg = {
1995 .dir_fh = NFS_FH(dir),
1996 .server = server,
1997 .name = name,
1998 .attrs = sattr,
1999 .ftype = NF4LNK,
2000 .bitmask = server->attr_bitmask,
2001 };
2002 struct nfs4_create_res res = {
2003 .server = server,
2004 .fh = fhandle,
2005 .fattr = fattr,
56ae19f3 2006 .dir_fattr = &dir_fattr,
1da177e4
LT		 2007 };
2008 struct rpc_message msg = {
2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2010 .rpc_argp = &arg,
2011 .rpc_resp = &res,
2012 };
2013 int status;
2014
2015 if (path->len > NFS4_MAXPATHLEN)
2016 return -ENAMETOOLONG;
2017 arg.u.symlink = path;
0e574af1 2018 nfs_fattr_init(fattr);
56ae19f3 2019 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2020
2021 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2022 if (!status)
2023 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2024 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2025 return status;
2026}
2027
2028static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2029 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2030 struct nfs_fattr *fattr)
2031{
2032 struct nfs4_exception exception = { };
2033 int err;
2034 do {
2035 err = nfs4_handle_exception(NFS_SERVER(dir),
2036 _nfs4_proc_symlink(dir, name, path, sattr,
2037 fhandle, fattr),
2038 &exception);
2039 } while (exception.retry);
2040 return err;
2041}
2042
2043static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2044 struct iattr *sattr)
2045{
2046 struct nfs_server *server = NFS_SERVER(dir);
2047 struct nfs_fh fhandle;
56ae19f3 2048 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2049 struct nfs4_create_arg arg = {
2050 .dir_fh = NFS_FH(dir),
2051 .server = server,
2052 .name = &dentry->d_name,
2053 .attrs = sattr,
2054 .ftype = NF4DIR,
2055 .bitmask = server->attr_bitmask,
2056 };
2057 struct nfs4_create_res res = {
2058 .server = server,
2059 .fh = &fhandle,
2060 .fattr = &fattr,
56ae19f3 2061 .dir_fattr = &dir_fattr,
1da177e4
LT		 2062 };
2063 struct rpc_message msg = {
2064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2065 .rpc_argp = &arg,
2066 .rpc_resp = &res,
2067 };
2068 int status;
2069
0e574af1 2070 nfs_fattr_init(&fattr);
56ae19f3 2071 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2072
2073 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2074 if (!status) {
2075 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2076 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2077 status = nfs_instantiate(dentry, &fhandle, &fattr);
2078 }
2079 return status;
2080}
2081
2082static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2083 struct iattr *sattr)
2084{
2085 struct nfs4_exception exception = { };
2086 int err;
2087 do {
2088 err = nfs4_handle_exception(NFS_SERVER(dir),
2089 _nfs4_proc_mkdir(dir, dentry, sattr),
2090 &exception);
2091 } while (exception.retry);
2092 return err;
2093}
2094
2095static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2096 u64 cookie, struct page *page, unsigned int count, int plus)
2097{
2098 struct inode *dir = dentry->d_inode;
2099 struct nfs4_readdir_arg args = {
2100 .fh = NFS_FH(dir),
2101 .pages = &page,
2102 .pgbase = 0,
2103 .count = count,
2104 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2105 };
2106 struct nfs4_readdir_res res;
2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2109 .rpc_argp = &args,
2110 .rpc_resp = &res,
2111 .rpc_cred = cred,
2112 };
2113 int status;
2114
eadf4598
TM		 2115 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2116 dentry->d_parent->d_name.name,
2117 dentry->d_name.name,
2118 (unsigned long long)cookie);
1da177e4
LT		 2119 lock_kernel();
2120 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2121 res.pgbase = args.pgbase;
2122 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2123 if (status == 0)
2124 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2125 unlock_kernel();
eadf4598 2126 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2127 return status;
2128}
2129
2130static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2131 u64 cookie, struct page *page, unsigned int count, int plus)
2132{
2133 struct nfs4_exception exception = { };
2134 int err;
2135 do {
2136 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2137 _nfs4_proc_readdir(dentry, cred, cookie,
2138 page, count, plus),
2139 &exception);
2140 } while (exception.retry);
2141 return err;
2142}
2143
2144static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2145 struct iattr *sattr, dev_t rdev)
2146{
2147 struct nfs_server *server = NFS_SERVER(dir);
2148 struct nfs_fh fh;
56ae19f3 2149 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2150 struct nfs4_create_arg arg = {
2151 .dir_fh = NFS_FH(dir),
2152 .server = server,
2153 .name = &dentry->d_name,
2154 .attrs = sattr,
2155 .bitmask = server->attr_bitmask,
2156 };
2157 struct nfs4_create_res res = {
2158 .server = server,
2159 .fh = &fh,
2160 .fattr = &fattr,
56ae19f3 2161 .dir_fattr = &dir_fattr,
1da177e4
LT		 2162 };
2163 struct rpc_message msg = {
2164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2165 .rpc_argp = &arg,
2166 .rpc_resp = &res,
2167 };
2168 int status;
2169 int mode = sattr->ia_mode;
2170
0e574af1 2171 nfs_fattr_init(&fattr);
56ae19f3 2172 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2173
2174 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2175 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2176 if (S_ISFIFO(mode))
2177 arg.ftype = NF4FIFO;
2178 else if (S_ISBLK(mode)) {
2179 arg.ftype = NF4BLK;
2180 arg.u.device.specdata1 = MAJOR(rdev);
2181 arg.u.device.specdata2 = MINOR(rdev);
2182 }
2183 else if (S_ISCHR(mode)) {
2184 arg.ftype = NF4CHR;
2185 arg.u.device.specdata1 = MAJOR(rdev);
2186 arg.u.device.specdata2 = MINOR(rdev);
2187 }
2188 else
2189 arg.ftype = NF4SOCK;
2190
2191 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2192 if (status == 0) {
2193 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2194 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2195 status = nfs_instantiate(dentry, &fh, &fattr);
2196 }
2197 return status;
2198}
2199
2200static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2201 struct iattr *sattr, dev_t rdev)
2202{
2203 struct nfs4_exception exception = { };
2204 int err;
2205 do {
2206 err = nfs4_handle_exception(NFS_SERVER(dir),
2207 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2208 &exception);
2209 } while (exception.retry);
2210 return err;
2211}
2212
2213static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2214 struct nfs_fsstat *fsstat)
2215{
2216 struct nfs4_statfs_arg args = {
2217 .fh = fhandle,
2218 .bitmask = server->attr_bitmask,
2219 };
2220 struct rpc_message msg = {
2221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2222 .rpc_argp = &args,
2223 .rpc_resp = fsstat,
2224 };
2225
0e574af1 2226 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2227 return rpc_call_sync(server->client, &msg, 0);
2228}
2229
2230static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2231{
2232 struct nfs4_exception exception = { };
2233 int err;
2234 do {
2235 err = nfs4_handle_exception(server,
2236 _nfs4_proc_statfs(server, fhandle, fsstat),
2237 &exception);
2238 } while (exception.retry);
2239 return err;
2240}
2241
2242static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2243 struct nfs_fsinfo *fsinfo)
2244{
2245 struct nfs4_fsinfo_arg args = {
2246 .fh = fhandle,
2247 .bitmask = server->attr_bitmask,
2248 };
2249 struct rpc_message msg = {
2250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2251 .rpc_argp = &args,
2252 .rpc_resp = fsinfo,
2253 };
2254
2255 return rpc_call_sync(server->client, &msg, 0);
2256}
2257
2258static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2259{
2260 struct nfs4_exception exception = { };
2261 int err;
2262
2263 do {
2264 err = nfs4_handle_exception(server,
2265 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2266 &exception);
2267 } while (exception.retry);
2268 return err;
2269}
2270
2271static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2272{
0e574af1 2273 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2274 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2275}
2276
2277static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2278 struct nfs_pathconf *pathconf)
2279{
2280 struct nfs4_pathconf_arg args = {
2281 .fh = fhandle,
2282 .bitmask = server->attr_bitmask,
2283 };
2284 struct rpc_message msg = {
2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2286 .rpc_argp = &args,
2287 .rpc_resp = pathconf,
2288 };
2289
2290 /* None of the pathconf attributes are mandatory to implement */
2291 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2292 memset(pathconf, 0, sizeof(*pathconf));
2293 return 0;
2294 }
2295
0e574af1 2296 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2297 return rpc_call_sync(server->client, &msg, 0);
2298}
2299
2300static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2301 struct nfs_pathconf *pathconf)
2302{
2303 struct nfs4_exception exception = { };
2304 int err;
2305
2306 do {
2307 err = nfs4_handle_exception(server,
2308 _nfs4_proc_pathconf(server, fhandle, pathconf),
2309 &exception);
2310 } while (exception.retry);
2311 return err;
2312}
2313
963d8fe5 2314static void nfs4_read_done(struct rpc_task *task, void *calldata)
1da177e4 2315{
963d8fe5 2316 struct nfs_read_data *data = calldata;
1da177e4
LT		 2317 struct inode *inode = data->inode;
2318
2319 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2320 rpc_restart_call(task);
2321 return;
2322 }
2323 if (task->tk_status > 0)
2324 renew_lease(NFS_SERVER(inode), data->timestamp);
2325 /* Call back common NFS readpage processing */
963d8fe5 2326 nfs_readpage_result(task, calldata);
1da177e4
LT		 2327}
2328
963d8fe5
TM		 2329static const struct rpc_call_ops nfs4_read_ops = {
2330 .rpc_call_done = nfs4_read_done,
2331 .rpc_release = nfs_readdata_release,
2332};
2333
1da177e4
LT		 2334static void
2335nfs4_proc_read_setup(struct nfs_read_data *data)
2336{
2337 struct rpc_task *task = &data->task;
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2340 .rpc_argp = &data->args,
2341 .rpc_resp = &data->res,
2342 .rpc_cred = data->cred,
2343 };
2344 struct inode *inode = data->inode;
2345 int flags;
2346
2347 data->timestamp = jiffies;
2348
2349 /* N.B. Do we need to test? Never called for swapfile inode */
2350 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
2351
2352 /* Finalize the task. */
963d8fe5 2353 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data);
1da177e4
LT		 2354 rpc_call_setup(task, &msg, 0);
2355}
2356
963d8fe5 2357static void nfs4_write_done(struct rpc_task *task, void *calldata)
1da177e4 2358{
963d8fe5 2359 struct nfs_write_data *data = calldata;
1da177e4
LT		 2360 struct inode *inode = data->inode;
2361
2362 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2363 rpc_restart_call(task);
2364 return;
2365 }
4f9838c7 2366 if (task->tk_status >= 0) {
1da177e4 2367 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2368 nfs_post_op_update_inode(inode, data->res.fattr);
2369 }
1da177e4 2370 /* Call back common NFS writeback processing */
963d8fe5 2371 nfs_writeback_done(task, calldata);
1da177e4
LT		 2372}
2373
963d8fe5
TM		 2374static const struct rpc_call_ops nfs4_write_ops = {
2375 .rpc_call_done = nfs4_write_done,
2376 .rpc_release = nfs_writedata_release,
2377};
2378
1da177e4
LT		 2379static void
2380nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2381{
2382 struct rpc_task *task = &data->task;
2383 struct rpc_message msg = {
2384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2385 .rpc_argp = &data->args,
2386 .rpc_resp = &data->res,
2387 .rpc_cred = data->cred,
2388 };
2389 struct inode *inode = data->inode;
4f9838c7 2390 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2391 int stable;
2392 int flags;
2393
2394 if (how & FLUSH_STABLE) {
2395 if (!NFS_I(inode)->ncommit)
2396 stable = NFS_FILE_SYNC;
2397 else
2398 stable = NFS_DATA_SYNC;
2399 } else
2400 stable = NFS_UNSTABLE;
2401 data->args.stable = stable;
4f9838c7
TM		 2402 data->args.bitmask = server->attr_bitmask;
2403 data->res.server = server;
1da177e4
LT		 2404
2405 data->timestamp = jiffies;
2406
2407 /* Set the initial flags for the task. */
2408 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2409
2410 /* Finalize the task. */
963d8fe5 2411 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data);
1da177e4
LT		 2412 rpc_call_setup(task, &msg, 0);
2413}
2414
963d8fe5 2415static void nfs4_commit_done(struct rpc_task *task, void *calldata)
1da177e4 2416{
963d8fe5 2417 struct nfs_write_data *data = calldata;
1da177e4
LT		 2418 struct inode *inode = data->inode;
2419
2420 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2421 rpc_restart_call(task);
2422 return;
2423 }
4f9838c7
TM		 2424 if (task->tk_status >= 0)
2425 nfs_post_op_update_inode(inode, data->res.fattr);
1da177e4 2426 /* Call back common NFS writeback processing */
963d8fe5 2427 nfs_commit_done(task, calldata);
1da177e4
LT		 2428}
2429
963d8fe5
TM		 2430static const struct rpc_call_ops nfs4_commit_ops = {
2431 .rpc_call_done = nfs4_commit_done,
2432 .rpc_release = nfs_commit_release,
2433};
2434
1da177e4
LT		 2435static void
2436nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2437{
2438 struct rpc_task *task = &data->task;
2439 struct rpc_message msg = {
2440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2441 .rpc_argp = &data->args,
2442 .rpc_resp = &data->res,
2443 .rpc_cred = data->cred,
2444 };
2445 struct inode *inode = data->inode;
4f9838c7 2446 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2447 int flags;
2448
4f9838c7
TM		 2449 data->args.bitmask = server->attr_bitmask;
2450 data->res.server = server;
2451
1da177e4
LT		 2452 /* Set the initial flags for the task. */
2453 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2454
2455 /* Finalize the task. */
963d8fe5 2456 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data);
1da177e4
LT		 2457 rpc_call_setup(task, &msg, 0);
2458}
2459
2460/*
2461 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2462 * standalone procedure for queueing an asynchronous RENEW.
2463 */
963d8fe5 2464static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4
LT		 2465{
2466 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
963d8fe5 2467 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2468
2469 if (task->tk_status < 0) {
2470 switch (task->tk_status) {
2471 case -NFS4ERR_STALE_CLIENTID:
2472 case -NFS4ERR_EXPIRED:
2473 case -NFS4ERR_CB_PATH_DOWN:
2474 nfs4_schedule_state_recovery(clp);
2475 }
2476 return;
2477 }
2478 spin_lock(&clp->cl_lock);
2479 if (time_before(clp->cl_last_renewal,timestamp))
2480 clp->cl_last_renewal = timestamp;
2481 spin_unlock(&clp->cl_lock);
2482}
2483
963d8fe5
TM		 2484static const struct rpc_call_ops nfs4_renew_ops = {
2485 .rpc_call_done = nfs4_renew_done,
2486};
2487
1da177e4
LT		 2488int
2489nfs4_proc_async_renew(struct nfs4_client *clp)
2490{
2491 struct rpc_message msg = {
2492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2493 .rpc_argp = clp,
2494 .rpc_cred = clp->cl_cred,
2495 };
2496
2497 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2498 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2499}
2500
2501int
2502nfs4_proc_renew(struct nfs4_client *clp)
2503{
2504 struct rpc_message msg = {
2505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2506 .rpc_argp = clp,
2507 .rpc_cred = clp->cl_cred,
2508 };
2509 unsigned long now = jiffies;
2510 int status;
2511
2512 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2513 if (status < 0)
2514 return status;
2515 spin_lock(&clp->cl_lock);
2516 if (time_before(clp->cl_last_renewal,now))
2517 clp->cl_last_renewal = now;
2518 spin_unlock(&clp->cl_lock);
2519 return 0;
2520}
2521
aa1870af
BF		 2522static inline int nfs4_server_supports_acls(struct nfs_server *server)
2523{
2524 return (server->caps & NFS_CAP_ACLS)
2525 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2526 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2527}
2528
2529/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2530 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2531 * the stack.
2532 */
2533#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2534
2535static void buf_to_pages(const void *buf, size_t buflen,
2536 struct page **pages, unsigned int *pgbase)
2537{
2538 const void *p = buf;
2539
2540 *pgbase = offset_in_page(buf);
2541 p -= *pgbase;
2542 while (p < buf + buflen) {
2543 *(pages++) = virt_to_page(p);
2544 p += PAGE_CACHE_SIZE;
2545 }
2546}
2547
e50a1c2e
BF		 2548struct nfs4_cached_acl {
2549 int cached;
2550 size_t len;
3e9d4154 2551 char data[0];
e50a1c2e
BF		 2552};
2553
2554static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2555{
2556 struct nfs_inode *nfsi = NFS_I(inode);
2557
2558 spin_lock(&inode->i_lock);
2559 kfree(nfsi->nfs4_acl);
2560 nfsi->nfs4_acl = acl;
2561 spin_unlock(&inode->i_lock);
2562}
2563
2564static void nfs4_zap_acl_attr(struct inode *inode)
2565{
2566 nfs4_set_cached_acl(inode, NULL);
2567}
2568
2569static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2570{
2571 struct nfs_inode *nfsi = NFS_I(inode);
2572 struct nfs4_cached_acl *acl;
2573 int ret = -ENOENT;
2574
2575 spin_lock(&inode->i_lock);
2576 acl = nfsi->nfs4_acl;
2577 if (acl == NULL)
2578 goto out;
2579 if (buf == NULL) /* user is just asking for length */
2580 goto out_len;
2581 if (acl->cached == 0)
2582 goto out;
2583 ret = -ERANGE; /* see getxattr(2) man page */
2584 if (acl->len > buflen)
2585 goto out;
2586 memcpy(buf, acl->data, acl->len);
2587out_len:
2588 ret = acl->len;
2589out:
2590 spin_unlock(&inode->i_lock);
2591 return ret;
2592}
2593
2594static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2595{
2596 struct nfs4_cached_acl *acl;
2597
2598 if (buf && acl_len <= PAGE_SIZE) {
2599 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2600 if (acl == NULL)
2601 goto out;
2602 acl->cached = 1;
2603 memcpy(acl->data, buf, acl_len);
2604 } else {
2605 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2606 if (acl == NULL)
2607 goto out;
2608 acl->cached = 0;
2609 }
2610 acl->len = acl_len;
2611out:
2612 nfs4_set_cached_acl(inode, acl);
2613}
2614
2615static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2616{
aa1870af
BF		 2617 struct page *pages[NFS4ACL_MAXPAGES];
2618 struct nfs_getaclargs args = {
2619 .fh = NFS_FH(inode),
2620 .acl_pages = pages,
2621 .acl_len = buflen,
2622 };
2623 size_t resp_len = buflen;
e50a1c2e 2624 void *resp_buf;
aa1870af
BF		 2625 struct rpc_message msg = {
2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2627 .rpc_argp = &args,
2628 .rpc_resp = &resp_len,
2629 };
e50a1c2e 2630 struct page *localpage = NULL;
aa1870af
BF		 2631 int ret;
2632
e50a1c2e
BF		 2633 if (buflen < PAGE_SIZE) {
2634 /* As long as we're doing a round trip to the server anyway,
2635 * let's be prepared for a page of acl data. */
2636 localpage = alloc_page(GFP_KERNEL);
2637 resp_buf = page_address(localpage);
2638 if (localpage == NULL)
2639 return -ENOMEM;
2640 args.acl_pages[0] = localpage;
2641 args.acl_pgbase = 0;
1d95db8e 2642 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2643 } else {
2644 resp_buf = buf;
2645 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2646 }
aa1870af 2647 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2648 if (ret)
2649 goto out_free;
2650 if (resp_len > args.acl_len)
2651 nfs4_write_cached_acl(inode, NULL, resp_len);
2652 else
2653 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2654 if (buf) {
2655 ret = -ERANGE;
2656 if (resp_len > buflen)
2657 goto out_free;
2658 if (localpage)
2659 memcpy(buf, resp_buf, resp_len);
2660 }
2661 ret = resp_len;
2662out_free:
2663 if (localpage)
2664 __free_page(localpage);
aa1870af
BF		 2665 return ret;
2666}
2667
e50a1c2e
BF		 2668static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2669{
2670 struct nfs_server *server = NFS_SERVER(inode);
2671 int ret;
2672
2673 if (!nfs4_server_supports_acls(server))
2674 return -EOPNOTSUPP;
2675 ret = nfs_revalidate_inode(server, inode);
2676 if (ret < 0)
2677 return ret;
2678 ret = nfs4_read_cached_acl(inode, buf, buflen);
2679 if (ret != -ENOENT)
2680 return ret;
2681 return nfs4_get_acl_uncached(inode, buf, buflen);
2682}
2683
4b580ee3
BF		 2684static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2685{
2686 struct nfs_server *server = NFS_SERVER(inode);
2687 struct page *pages[NFS4ACL_MAXPAGES];
2688 struct nfs_setaclargs arg = {
2689 .fh = NFS_FH(inode),
2690 .acl_pages = pages,
2691 .acl_len = buflen,
2692 };
2693 struct rpc_message msg = {
2694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2695 .rpc_argp = &arg,
2696 .rpc_resp = NULL,
2697 };
2698 int ret;
2699
2700 if (!nfs4_server_supports_acls(server))
2701 return -EOPNOTSUPP;
642ac549 2702 nfs_inode_return_delegation(inode);
4b580ee3
BF		 2703 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2704 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2705 if (ret == 0)
2706 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2707 return ret;
2708}
2709
1da177e4 2710static int
faf5f49c 2711nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4
LT		 2712{
2713 struct nfs4_client *clp = server->nfs4_state;
2714
2715 if (!clp || task->tk_status >= 0)
2716 return 0;
2717 switch(task->tk_status) {
2718 case -NFS4ERR_STALE_CLIENTID:
2719 case -NFS4ERR_STALE_STATEID:
2720 case -NFS4ERR_EXPIRED:
2721 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2722 nfs4_schedule_state_recovery(clp);
2723 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2724 rpc_wake_up_task(task);
2725 task->tk_status = 0;
2726 return -EAGAIN;
2727 case -NFS4ERR_GRACE:
2728 case -NFS4ERR_DELAY:
2729 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2730 task->tk_status = 0;
2731 return -EAGAIN;
2732 case -NFS4ERR_OLD_STATEID:
2733 task->tk_status = 0;
2734 return -EAGAIN;
2735 }
2736 task->tk_status = nfs4_map_errors(task->tk_status);
2737 return 0;
2738}
2739
2740static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2741{
2742 DEFINE_WAIT(wait);
2743 sigset_t oldset;
2744 int interruptible, res = 0;
2745
2746 might_sleep();
2747
2748 rpc_clnt_sigmask(clnt, &oldset);
2749 interruptible = TASK_UNINTERRUPTIBLE;
2750 if (clnt->cl_intr)
2751 interruptible = TASK_INTERRUPTIBLE;
2752 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2753 nfs4_schedule_state_recovery(clp);
2754 if (clnt->cl_intr && signalled())
2755 res = -ERESTARTSYS;
2756 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2757 schedule();
2758 finish_wait(&clp->cl_waitq, &wait);
2759 rpc_clnt_sigunmask(clnt, &oldset);
2760 return res;
2761}
2762
2763static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2764{
2765 sigset_t oldset;
2766 int res = 0;
2767
2768 might_sleep();
2769
2770 if (*timeout <= 0)
2771 *timeout = NFS4_POLL_RETRY_MIN;
2772 if (*timeout > NFS4_POLL_RETRY_MAX)
2773 *timeout = NFS4_POLL_RETRY_MAX;
2774 rpc_clnt_sigmask(clnt, &oldset);
2775 if (clnt->cl_intr) {
041e0e3b 2776 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2777 if (signalled())
2778 res = -ERESTARTSYS;
041e0e3b
NA		 2779 } else
2780 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2781 rpc_clnt_sigunmask(clnt, &oldset);
2782 *timeout <<= 1;
2783 return res;
2784}
2785
2786/* This is the error handling routine for processes that are allowed
2787 * to sleep.
2788 */
faf5f49c 2789int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4
LT		 2790{
2791 struct nfs4_client *clp = server->nfs4_state;
2792 int ret = errorcode;
2793
2794 exception->retry = 0;
2795 switch(errorcode) {
2796 case 0:
2797 return 0;
2798 case -NFS4ERR_STALE_CLIENTID:
2799 case -NFS4ERR_STALE_STATEID:
2800 case -NFS4ERR_EXPIRED:
2801 ret = nfs4_wait_clnt_recover(server->client, clp);
2802 if (ret == 0)
2803 exception->retry = 1;
2804 break;
2805 case -NFS4ERR_GRACE:
2806 case -NFS4ERR_DELAY:
2807 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2808 if (ret != 0)
2809 break;
1da177e4 2810 case -NFS4ERR_OLD_STATEID:
2c56617d 2811 exception->retry = 1;
1da177e4
LT		 2812 }
2813 /* We failed to handle the error */
2814 return nfs4_map_errors(ret);
2815}
2816
2817int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2818{
2819 nfs4_verifier sc_verifier;
2820 struct nfs4_setclientid setclientid = {
2821 .sc_verifier = &sc_verifier,
2822 .sc_prog = program,
2823 };
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2826 .rpc_argp = &setclientid,
2827 .rpc_resp = clp,
2828 .rpc_cred = clp->cl_cred,
2829 };
2830 u32 *p;
2831 int loop = 0;
2832 int status;
2833
2834 p = (u32*)sc_verifier.data;
2835 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2836 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2837
2838 for(;;) {
2839 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2840 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2841 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2842 clp->cl_cred->cr_ops->cr_name,
2843 clp->cl_id_uniquifier);
2844 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2845 sizeof(setclientid.sc_netid), "tcp");
2846 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2847 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2848 clp->cl_ipaddr, port >> 8, port & 255);
2849
2850 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2851 if (status != -NFS4ERR_CLID_INUSE)
2852 break;
2853 if (signalled())
2854 break;
2855 if (loop++ & 1)
2856 ssleep(clp->cl_lease_time + 1);
2857 else
2858 if (++clp->cl_id_uniquifier == 0)
2859 break;
2860 }
2861 return status;
2862}
2863
2864int
2865nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2866{
2867 struct nfs_fsinfo fsinfo;
2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2870 .rpc_argp = clp,
2871 .rpc_resp = &fsinfo,
2872 .rpc_cred = clp->cl_cred,
2873 };
2874 unsigned long now;
2875 int status;
2876
2877 now = jiffies;
2878 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2879 if (status == 0) {
2880 spin_lock(&clp->cl_lock);
2881 clp->cl_lease_time = fsinfo.lease_time * HZ;
2882 clp->cl_last_renewal = now;
2883 spin_unlock(&clp->cl_lock);
2884 }
2885 return status;
2886}
2887
fe650407
TM		 2888struct nfs4_delegreturndata {
2889 struct nfs4_delegreturnargs args;
2890 struct nfs_fh fh;
2891 nfs4_stateid stateid;
2892 struct rpc_cred *cred;
2893 int rpc_status;
2894};
2895
2896static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2897{
fe650407 2898 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2899 struct rpc_message msg = {
2900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407
TM		 2901 .rpc_argp = &data->args,
2902 .rpc_cred = data->cred,
1da177e4 2903 };
fe650407
TM		 2904 rpc_call_setup(task, &msg, 0);
2905}
1da177e4 2906
fe650407
TM		 2907static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2908{
2909 struct nfs4_delegreturndata *data = calldata;
2910 data->rpc_status = task->tk_status;
2911}
2912
2913static void nfs4_delegreturn_release(void *calldata)
2914{
2915 struct nfs4_delegreturndata *data = calldata;
2916
2917 put_rpccred(data->cred);
2918 kfree(calldata);
2919}
2920
2921const static struct rpc_call_ops nfs4_delegreturn_ops = {
2922 .rpc_call_prepare = nfs4_delegreturn_prepare,
2923 .rpc_call_done = nfs4_delegreturn_done,
2924 .rpc_release = nfs4_delegreturn_release,
2925};
2926
2927static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2928{
2929 struct nfs4_delegreturndata *data;
2930 struct rpc_task *task;
2931 int status;
2932
2933 data = kmalloc(sizeof(*data), GFP_KERNEL);
2934 if (data == NULL)
2935 return -ENOMEM;
2936 data->args.fhandle = &data->fh;
2937 data->args.stateid = &data->stateid;
2938 nfs_copy_fh(&data->fh, NFS_FH(inode));
2939 memcpy(&data->stateid, stateid, sizeof(data->stateid));
2940 data->cred = get_rpccred(cred);
2941 data->rpc_status = 0;
2942
2943 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2944 if (IS_ERR(task)) {
2945 nfs4_delegreturn_release(data);
2946 return PTR_ERR(task);
2947 }
2948 status = nfs4_wait_for_completion_rpc_task(task);
2949 if (status == 0)
2950 status = data->rpc_status;
2951 rpc_release_task(task);
2952 return status;
1da177e4
LT		 2953}
2954
2955int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2956{
2957 struct nfs_server *server = NFS_SERVER(inode);
2958 struct nfs4_exception exception = { };
2959 int err;
2960 do {
2961 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2962 switch (err) {
2963 case -NFS4ERR_STALE_STATEID:
2964 case -NFS4ERR_EXPIRED:
2965 nfs4_schedule_state_recovery(server->nfs4_state);
2966 case 0:
2967 return 0;
2968 }
2969 err = nfs4_handle_exception(server, err, &exception);
2970 } while (exception.retry);
2971 return err;
2972}
2973
2974#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2975#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2976
2977/*
2978 * sleep, with exponential backoff, and retry the LOCK operation.
2979 */
2980static unsigned long
2981nfs4_set_lock_task_retry(unsigned long timeout)
2982{
041e0e3b 2983 schedule_timeout_interruptible(timeout);
1da177e4
LT		 2984 timeout <<= 1;
2985 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2986 return NFS4_LOCK_MAXTIMEOUT;
2987 return timeout;
2988}
2989
1da177e4
LT		 2990static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2991{
2992 struct inode *inode = state->inode;
2993 struct nfs_server *server = NFS_SERVER(inode);
2994 struct nfs4_client *clp = server->nfs4_state;
911d1aaf 2995 struct nfs_lockt_args arg = {
1da177e4 2996 .fh = NFS_FH(inode),
911d1aaf 2997 .fl = request,
1da177e4 2998 };
911d1aaf
TM		 2999 struct nfs_lockt_res res = {
3000 .denied = request,
1da177e4
LT		 3001 };
3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3004 .rpc_argp = &arg,
3005 .rpc_resp = &res,
3006 .rpc_cred = state->owner->so_cred,
3007 };
1da177e4
LT		 3008 struct nfs4_lock_state *lsp;
3009 int status;
3010
3011 down_read(&clp->cl_sem);
911d1aaf 3012 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3013 status = nfs4_set_lock_state(state, request);
3014 if (status != 0)
3015 goto out;
3016 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3017 arg.lock_owner.id = lsp->ls_id;
1da177e4 3018 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3019 switch (status) {
3020 case 0:
3021 request->fl_type = F_UNLCK;
3022 break;
3023 case -NFS4ERR_DENIED:
3024 status = 0;
1da177e4 3025 }
8d0a8a9d 3026out:
1da177e4
LT		 3027 up_read(&clp->cl_sem);
3028 return status;
3029}
3030
3031static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3032{
3033 struct nfs4_exception exception = { };
3034 int err;
3035
3036 do {
3037 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3038 _nfs4_proc_getlk(state, cmd, request),
3039 &exception);
3040 } while (exception.retry);
3041 return err;
3042}
3043
3044static int do_vfs_lock(struct file *file, struct file_lock *fl)
3045{
3046 int res = 0;
3047 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3048 case FL_POSIX:
3049 res = posix_lock_file_wait(file, fl);
3050 break;
3051 case FL_FLOCK:
3052 res = flock_lock_file_wait(file, fl);
3053 break;
3054 default:
3055 BUG();
3056 }
3057 if (res < 0)
3058 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3059 __FUNCTION__);
3060 return res;
3061}
3062
faf5f49c 3063struct nfs4_unlockdata {
911d1aaf
TM		 3064 struct nfs_locku_args arg;
3065 struct nfs_locku_res res;
faf5f49c
TM		 3066 struct nfs4_lock_state *lsp;
3067 struct nfs_open_context *ctx;
911d1aaf
TM		 3068 struct file_lock fl;
3069 const struct nfs_server *server;
faf5f49c
TM		 3070};
3071
911d1aaf
TM		 3072static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3073 struct nfs_open_context *ctx,
3074 struct nfs4_lock_state *lsp,
3075 struct nfs_seqid *seqid)
3076{
3077 struct nfs4_unlockdata *p;
3078 struct inode *inode = lsp->ls_state->inode;
3079
3080 p = kmalloc(sizeof(*p), GFP_KERNEL);
3081 if (p == NULL)
3082 return NULL;
3083 p->arg.fh = NFS_FH(inode);
3084 p->arg.fl = &p->fl;
3085 p->arg.seqid = seqid;
3086 p->arg.stateid = &lsp->ls_stateid;
3087 p->lsp = lsp;
3088 atomic_inc(&lsp->ls_count);
3089 /* Ensure we don't close file until we're done freeing locks! */
3090 p->ctx = get_nfs_open_context(ctx);
3091 memcpy(&p->fl, fl, sizeof(p->fl));
3092 p->server = NFS_SERVER(inode);
3093 return p;
3094}
3095
06f814a3 3096static void nfs4_locku_release_calldata(void *data)
faf5f49c 3097{
963d8fe5 3098 struct nfs4_unlockdata *calldata = data;
911d1aaf 3099 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3100 nfs4_put_lock_state(calldata->lsp);
3101 put_nfs_open_context(calldata->ctx);
3102 kfree(calldata);
faf5f49c
TM		 3103}
3104
963d8fe5 3105static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3106{
963d8fe5 3107 struct nfs4_unlockdata *calldata = data;
faf5f49c 3108
06f814a3
TM		 3109 if (RPC_ASSASSINATED(task))
3110 return;
911d1aaf 3111 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3112 switch (task->tk_status) {
3113 case 0:
3114 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3115 calldata->res.stateid.data,
faf5f49c
TM		 3116 sizeof(calldata->lsp->ls_stateid.data));
3117 break;
3118 case -NFS4ERR_STALE_STATEID:
3119 case -NFS4ERR_EXPIRED:
911d1aaf 3120 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
faf5f49c
TM		 3121 break;
3122 default:
911d1aaf 3123 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3124 rpc_restart_call(task);
faf5f49c
TM		 3125 }
3126 }
faf5f49c
TM		 3127}
3128
4ce70ada 3129static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3130{
4ce70ada 3131 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3132 struct rpc_message msg = {
3133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3134 .rpc_argp = &calldata->arg,
3135 .rpc_resp = &calldata->res,
3136 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3137 };
faf5f49c 3138
911d1aaf 3139 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3140 return;
3141 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3142 /* Note: exit _without_ running nfs4_locku_done */
3143 task->tk_action = NULL;
faf5f49c
TM		 3144 return;
3145 }
3146 rpc_call_setup(task, &msg, 0);
3147}
3148
963d8fe5 3149static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3150 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3151 .rpc_call_done = nfs4_locku_done,
06f814a3 3152 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3153};
3154
a5d16a4d
TM		 3155static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3156 struct nfs_open_context *ctx,
3157 struct nfs4_lock_state *lsp,
3158 struct nfs_seqid *seqid)
3159{
3160 struct nfs4_unlockdata *data;
3161 struct rpc_task *task;
3162
3163 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3164 if (data == NULL) {
3165 nfs_free_seqid(seqid);
3166 return ERR_PTR(-ENOMEM);
3167 }
3168
3169 /* Unlock _before_ we do the RPC call */
3170 do_vfs_lock(fl->fl_file, fl);
3171 task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3172 if (IS_ERR(task))
3173 nfs4_locku_release_calldata(data);
3174 return task;
3175}
3176
faf5f49c
TM		 3177static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3178{
911d1aaf 3179 struct nfs_seqid *seqid;
1da177e4 3180 struct nfs4_lock_state *lsp;
06f814a3
TM		 3181 struct rpc_task *task;
3182 int status = 0;
faf5f49c 3183
6bfc93ef
TM		 3184 /* Is this a delegated lock? */
3185 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
911d1aaf
TM		 3186 goto out_unlock;
3187 /* Is this open_owner holding any locks on the server? */
3188 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3189 goto out_unlock;
6bfc93ef 3190
8d0a8a9d
TM		 3191 status = nfs4_set_lock_state(state, request);
3192 if (status != 0)
911d1aaf 3193 goto out_unlock;
8d0a8a9d 3194 lsp = request->fl_u.nfs4_fl.owner;
06f814a3 3195 status = -ENOMEM;
911d1aaf
TM		 3196 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3197 if (seqid == NULL)
3198 goto out_unlock;
a5d16a4d
TM		 3199 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3200 status = PTR_ERR(task);
3201 if (IS_ERR(task))
3202 goto out_unlock;
3203 status = nfs4_wait_for_completion_rpc_task(task);
3204 rpc_release_task(task);
911d1aaf 3205 return status;
911d1aaf 3206out_unlock:
faf5f49c 3207 do_vfs_lock(request->fl_file, request);
1da177e4
LT		 3208 return status;
3209}
3210
a5d16a4d
TM		 3211struct nfs4_lockdata {
3212 struct nfs_lock_args arg;
3213 struct nfs_lock_res res;
3214 struct nfs4_lock_state *lsp;
3215 struct nfs_open_context *ctx;
3216 struct file_lock fl;
3217 int rpc_status;
3218 int cancelled;
3219};
3220
3221static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3222 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3223{
a5d16a4d
TM		 3224 struct nfs4_lockdata *p;
3225 struct inode *inode = lsp->ls_state->inode;
1da177e4 3226 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3227
3228 p = kzalloc(sizeof(*p), GFP_KERNEL);
3229 if (p == NULL)
3230 return NULL;
3231
3232 p->arg.fh = NFS_FH(inode);
3233 p->arg.fl = &p->fl;
3234 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3235 if (p->arg.lock_seqid == NULL)
3236 goto out_free;
3237 p->arg.lock_stateid = &lsp->ls_stateid;
3238 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3239 p->arg.lock_owner.id = lsp->ls_id;
3240 p->lsp = lsp;
3241 atomic_inc(&lsp->ls_count);
3242 p->ctx = get_nfs_open_context(ctx);
3243 memcpy(&p->fl, fl, sizeof(p->fl));
3244 return p;
3245out_free:
3246 kfree(p);
3247 return NULL;
3248}
3249
3250static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3251{
3252 struct nfs4_lockdata *data = calldata;
3253 struct nfs4_state *state = data->lsp->ls_state;
3254 struct nfs4_state_owner *sp = state->owner;
1da177e4 3255 struct rpc_message msg = {
a5d16a4d
TM		 3256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3257 .rpc_argp = &data->arg,
3258 .rpc_resp = &data->res,
3259 .rpc_cred = sp->so_cred,
1da177e4 3260 };
06735b34 3261
a5d16a4d
TM		 3262 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3263 return;
3264 dprintk("%s: begin!\n", __FUNCTION__);
3265 /* Do we need to do an open_to_lock_owner? */
3266 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3267 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3268 if (data->arg.open_seqid == NULL) {
3269 data->rpc_status = -ENOMEM;
3270 task->tk_action = NULL;
06735b34 3271 goto out;
8d0a8a9d 3272 }
a5d16a4d
TM		 3273 data->arg.open_stateid = &state->stateid;
3274 data->arg.new_lock_owner = 1;
3275 }
3276 rpc_call_setup(task, &msg, 0);
06735b34 3277out:
a5d16a4d
TM		 3278 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3279}
3280
3281static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3282{
3283 struct nfs4_lockdata *data = calldata;
3284
3285 dprintk("%s: begin!\n", __FUNCTION__);
3286
3287 data->rpc_status = task->tk_status;
3288 if (RPC_ASSASSINATED(task))
3289 goto out;
3290 if (data->arg.new_lock_owner != 0) {
3291 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3292 if (data->rpc_status == 0)
3293 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3294 else
3295 goto out;
3296 }
3297 if (data->rpc_status == 0) {
3298 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3299 sizeof(data->lsp->ls_stateid.data));
3300 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3301 }
3302 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3303out:
3304 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3305}
3306
3307static void nfs4_lock_release(void *calldata)
3308{
3309 struct nfs4_lockdata *data = calldata;
3310
3311 dprintk("%s: begin!\n", __FUNCTION__);
3312 if (data->arg.open_seqid != NULL)
3313 nfs_free_seqid(data->arg.open_seqid);
3314 if (data->cancelled != 0) {
3315 struct rpc_task *task;
3316 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3317 data->arg.lock_seqid);
3318 if (!IS_ERR(task))
3319 rpc_release_task(task);
3320 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3321 } else
3322 nfs_free_seqid(data->arg.lock_seqid);
3323 nfs4_put_lock_state(data->lsp);
3324 put_nfs_open_context(data->ctx);
3325 kfree(data);
3326 dprintk("%s: done!\n", __FUNCTION__);
3327}
3328
3329static const struct rpc_call_ops nfs4_lock_ops = {
3330 .rpc_call_prepare = nfs4_lock_prepare,
3331 .rpc_call_done = nfs4_lock_done,
3332 .rpc_release = nfs4_lock_release,
3333};
3334
3335static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3336{
3337 struct nfs4_lockdata *data;
3338 struct rpc_task *task;
3339 int ret;
3340
3341 dprintk("%s: begin!\n", __FUNCTION__);
3342 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3343 fl->fl_u.nfs4_fl.owner);
3344 if (data == NULL)
3345 return -ENOMEM;
3346 if (IS_SETLKW(cmd))
3347 data->arg.block = 1;
3348 if (reclaim != 0)
3349 data->arg.reclaim = 1;
3350 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3351 &nfs4_lock_ops, data);
3352 if (IS_ERR(task)) {
3353 nfs4_lock_release(data);
3354 return PTR_ERR(task);
3355 }
3356 ret = nfs4_wait_for_completion_rpc_task(task);
3357 if (ret == 0) {
3358 ret = data->rpc_status;
3359 if (ret == -NFS4ERR_DENIED)
3360 ret = -EAGAIN;
3361 } else
3362 data->cancelled = 1;
3363 rpc_release_task(task);
3364 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3365 return ret;
1da177e4
LT		 3366}
3367
3368static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3369{
202b50dc
TM		 3370 struct nfs_server *server = NFS_SERVER(state->inode);
3371 struct nfs4_exception exception = { };
3372 int err;
3373
6bfc93ef
TM		 3374 /* Cache the lock if possible... */
3375 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3376 return 0;
202b50dc
TM		 3377 do {
3378 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3379 if (err != -NFS4ERR_DELAY)
3380 break;
3381 nfs4_handle_exception(server, err, &exception);
3382 } while (exception.retry);
3383 return err;
1da177e4
LT		 3384}
3385
3386static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3387{
202b50dc
TM		 3388 struct nfs_server *server = NFS_SERVER(state->inode);
3389 struct nfs4_exception exception = { };
3390 int err;
3391
6bfc93ef
TM		 3392 err = nfs4_set_lock_state(state, request);
3393 if (err != 0)
3394 return err;
202b50dc
TM		 3395 do {
3396 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3397 if (err != -NFS4ERR_DELAY)
3398 break;
3399 nfs4_handle_exception(server, err, &exception);
3400 } while (exception.retry);
3401 return err;
1da177e4
LT		 3402}
3403
3404static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3405{
3406 struct nfs4_client *clp = state->owner->so_client;
3407 int status;
3408
6bfc93ef 3409 /* Is this a delegated open? */
ff604066 3410 if (NFS_I(state->inode)->delegation_state != 0) {
6bfc93ef
TM		 3411 /* Yes: cache locks! */
3412 status = do_vfs_lock(request->fl_file, request);
3413 /* ...but avoid races with delegation recall... */
3414 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
ff604066 3415 return status;
1da177e4 3416 }
ff604066 3417 down_read(&clp->cl_sem);
6bfc93ef
TM		 3418 status = nfs4_set_lock_state(state, request);
3419 if (status != 0)
3420 goto out;
3421 status = _nfs4_do_setlk(state, cmd, request, 0);
3422 if (status != 0)
3423 goto out;
3424 /* Note: we always want to sleep here! */
3425 request->fl_flags |= FL_SLEEP;
3426 if (do_vfs_lock(request->fl_file, request) < 0)
3427 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3428out:
1da177e4
LT		 3429 up_read(&clp->cl_sem);
3430 return status;
3431}
3432
3433static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3434{
3435 struct nfs4_exception exception = { };
3436 int err;
3437
3438 do {
3439 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3440 _nfs4_proc_setlk(state, cmd, request),
3441 &exception);
3442 } while (exception.retry);
3443 return err;
3444}
3445
3446static int
3447nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3448{
3449 struct nfs_open_context *ctx;
3450 struct nfs4_state *state;
3451 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3452 int status;
3453
3454 /* verify open state */
3455 ctx = (struct nfs_open_context *)filp->private_data;
3456 state = ctx->state;
3457
3458 if (request->fl_start < 0 || request->fl_end < 0)
3459 return -EINVAL;
3460
3461 if (IS_GETLK(cmd))
3462 return nfs4_proc_getlk(state, F_GETLK, request);
3463
3464 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3465 return -EINVAL;
3466
3467 if (request->fl_type == F_UNLCK)
3468 return nfs4_proc_unlck(state, cmd, request);
3469
3470 do {
3471 status = nfs4_proc_setlk(state, cmd, request);
3472 if ((status != -EAGAIN) || IS_SETLK(cmd))
3473 break;
3474 timeout = nfs4_set_lock_task_retry(timeout);
3475 status = -ERESTARTSYS;
3476 if (signalled())
3477 break;
3478 } while(status < 0);
1da177e4
LT		 3479 return status;
3480}
3481
888e694c
TM		 3482int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3483{
3484 struct nfs_server *server = NFS_SERVER(state->inode);
3485 struct nfs4_exception exception = { };
3486 int err;
3487
3488 err = nfs4_set_lock_state(state, fl);
3489 if (err != 0)
3490 goto out;
3491 do {
3492 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3493 if (err != -NFS4ERR_DELAY)
3494 break;
3495 err = nfs4_handle_exception(server, err, &exception);
3496 } while (exception.retry);
3497out:
3498 return err;
3499}
6b3b5496 3500
aa1870af
BF		 3501#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3502
6b3b5496
BF		 3503int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3504 size_t buflen, int flags)
3505{
4b580ee3
BF		 3506 struct inode *inode = dentry->d_inode;
3507
3508 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3509 return -EOPNOTSUPP;
3510
3511 if (!S_ISREG(inode->i_mode) &&
3512 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3513 return -EPERM;
3514
3515 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3516}
3517
3518/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3519 * and that's what we'll do for e.g. user attributes that haven't been set.
3520 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3521 * attributes in kernel-managed attribute namespaces. */
3522ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3523 size_t buflen)
3524{
aa1870af
BF		 3525 struct inode *inode = dentry->d_inode;
3526
3527 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3528 return -EOPNOTSUPP;
3529
3530 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3531}
3532
3533ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3534{
aa1870af 3535 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496
BF		 3536
3537 if (buf && buflen < len)
3538 return -ERANGE;
3539 if (buf)
aa1870af
BF		 3540 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3541 return len;
6b3b5496
BF		 3542}
3543
1da177e4
LT		 3544struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3545 .recover_open = nfs4_open_reclaim,
3546 .recover_lock = nfs4_lock_reclaim,
3547};
3548
3549struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3550 .recover_open = nfs4_open_expired,
3551 .recover_lock = nfs4_lock_expired,
3552};
3553
6b3b5496
BF		 3554static struct inode_operations nfs4_file_inode_operations = {
3555 .permission = nfs_permission,
3556 .getattr = nfs_getattr,
3557 .setattr = nfs_setattr,
3558 .getxattr = nfs4_getxattr,
3559 .setxattr = nfs4_setxattr,
3560 .listxattr = nfs4_listxattr,
3561};
3562
1da177e4
LT		 3563struct nfs_rpc_ops nfs_v4_clientops = {
3564 .version = 4, /* protocol version */
3565 .dentry_ops = &nfs4_dentry_operations,
3566 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3567 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3568 .getroot = nfs4_proc_get_root,
3569 .getattr = nfs4_proc_getattr,
3570 .setattr = nfs4_proc_setattr,
3571 .lookup = nfs4_proc_lookup,
3572 .access = nfs4_proc_access,
3573 .readlink = nfs4_proc_readlink,
3574 .read = nfs4_proc_read,
3575 .write = nfs4_proc_write,
3576 .commit = nfs4_proc_commit,
3577 .create = nfs4_proc_create,
3578 .remove = nfs4_proc_remove,
3579 .unlink_setup = nfs4_proc_unlink_setup,
3580 .unlink_done = nfs4_proc_unlink_done,
3581 .rename = nfs4_proc_rename,
3582 .link = nfs4_proc_link,
3583 .symlink = nfs4_proc_symlink,
3584 .mkdir = nfs4_proc_mkdir,
3585 .rmdir = nfs4_proc_remove,
3586 .readdir = nfs4_proc_readdir,
3587 .mknod = nfs4_proc_mknod,
3588 .statfs = nfs4_proc_statfs,
3589 .fsinfo = nfs4_proc_fsinfo,
3590 .pathconf = nfs4_proc_pathconf,
3591 .decode_dirent = nfs4_decode_dirent,
3592 .read_setup = nfs4_proc_read_setup,
3593 .write_setup = nfs4_proc_write_setup,
3594 .commit_setup = nfs4_proc_commit_setup,
02a913a7
TM		 3595 .file_open = nfs_open,
3596 .file_release = nfs_release,
1da177e4 3597 .lock = nfs4_proc_lock,
e50a1c2e 3598 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3599};
3600
3601/*
3602 * Local variables:
3603 * c-basic-offset: 8
3604 * End:
3605 */
Linux 6.x block layer and io_uring tree(s)