blob: 5b2446173dd844f4398a6b426f31aad6afac2c52 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Trond Myklebust02a913a2005-10-18 14:20:17 -070050#include <linux/mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Trond Myklebust4ce79712005-06-22 17:16:21 +000052#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include "delegation.h"
Chuck Lever006ea732006-03-20 13:44:14 -050054#include "iostat.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#define NFSDBG_FACILITY NFSDBG_PROC
57
Trond Myklebust2066fe82006-09-15 08:30:46 -040058#define NFS4_POLL_RETRY_MIN (HZ/10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#define NFS4_POLL_RETRY_MAX (15*HZ)
60
Trond Myklebustcdd4e682006-01-03 09:55:12 +010061struct nfs4_opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +010062static int _nfs4_proc_open(struct nfs4_opendata *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070064static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
Trond Myklebustfaf5f492005-10-18 14:20:15 -070066static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
David Howellsadfa6f92006-08-22 20:06:08 -040067static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069/* 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
Trond Myklebust4ce79712005-06-22 17:16:21 +0000109const u32 nfs4_pathconf_bitmap[2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 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
Manoj Naik830b8e32006-06-09 09:34:25 -0400122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
Al Virobc4785c2006-10-19 23:28:51 -0700141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 struct nfs4_readdir_arg *readdir)
143{
Al Viro0dbb4c62006-10-19 23:28:49 -0700144 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000148 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
Al Viro0dbb4c62006-10-19 23:28:49 -0700165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
Trond Myklebust26e976a2006-01-03 09:55:21 +0100196static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
David Howells7539bba2006-08-22 20:06:09 -0400198 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
203}
204
Trond Myklebust38478b22006-05-25 01:40:57 -0400205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
Trond Myklebust38478b22006-05-25 01:40:57 -0400207 struct nfs_inode *nfsi = NFS_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Trond Myklebust38478b22006-05-25 01:40:57 -0400209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
Trond Myklebust38478b22006-05-25 01:40:57 -0400213 spin_unlock(&dir->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100216struct nfs4_opendata {
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100217 atomic_t count;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
224 struct dentry *dentry;
225 struct dentry *dir;
226 struct nfs4_state_owner *owner;
227 struct iattr attrs;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100228 unsigned long timestamp;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100229 int rpc_status;
230 int cancelled;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100231};
232
233static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
236{
237 struct dentry *parent = dget_parent(dentry);
238 struct inode *dir = parent->d_inode;
239 struct nfs_server *server = NFS_SERVER(dir);
240 struct nfs4_opendata *p;
241
242 p = kzalloc(sizeof(*p), GFP_KERNEL);
243 if (p == NULL)
244 goto err;
245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
246 if (p->o_arg.seqid == NULL)
247 goto err_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100248 atomic_set(&p->count, 1);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100249 p->dentry = dget(dentry);
250 p->dir = parent;
251 p->owner = sp;
252 atomic_inc(&sp->so_count);
253 p->o_arg.fh = NFS_FH(dir);
254 p->o_arg.open_flags = flags,
David Howells7539bba2006-08-22 20:06:09 -0400255 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100256 p->o_arg.id = sp->so_id;
257 p->o_arg.name = &dentry->d_name;
258 p->o_arg.server = server;
259 p->o_arg.bitmask = server->attr_bitmask;
260 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
261 p->o_res.f_attr = &p->f_attr;
262 p->o_res.dir_attr = &p->dir_attr;
263 p->o_res.server = server;
264 nfs_fattr_init(&p->f_attr);
265 nfs_fattr_init(&p->dir_attr);
266 if (flags & O_EXCL) {
267 u32 *s = (u32 *) p->o_arg.u.verifier.data;
268 s[0] = jiffies;
269 s[1] = current->pid;
270 } else if (flags & O_CREAT) {
271 p->o_arg.u.attrs = &p->attrs;
272 memcpy(&p->attrs, attrs, sizeof(p->attrs));
273 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100274 p->c_arg.fh = &p->o_res.fh;
275 p->c_arg.stateid = &p->o_res.stateid;
276 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100277 return p;
278err_free:
279 kfree(p);
280err:
281 dput(parent);
282 return NULL;
283}
284
285static void nfs4_opendata_free(struct nfs4_opendata *p)
286{
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100287 if (p != NULL && atomic_dec_and_test(&p->count)) {
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100288 nfs_free_seqid(p->o_arg.seqid);
289 nfs4_put_state_owner(p->owner);
290 dput(p->dir);
291 dput(p->dentry);
292 kfree(p);
293 }
294}
295
Trond Myklebust95121352005-10-18 14:20:12 -0700296/* Helper for asynchronous RPC calls */
Trond Myklebust4ce70ad2006-01-03 09:55:05 +0100297static int nfs4_call_async(struct rpc_clnt *clnt,
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100298 const struct rpc_call_ops *tk_ops, void *calldata)
Trond Myklebust95121352005-10-18 14:20:12 -0700299{
300 struct rpc_task *task;
301
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
Trond Myklebust95121352005-10-18 14:20:12 -0700303 return -ENOMEM;
Trond Myklebust95121352005-10-18 14:20:12 -0700304 rpc_execute(task);
305 return 0;
306}
307
Trond Myklebust06f814a2006-01-03 09:55:07 +0100308static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
309{
310 sigset_t oldset;
311 int ret;
312
313 rpc_clnt_sigmask(task->tk_client, &oldset);
314 ret = rpc_wait_for_completion_task(task);
315 rpc_clnt_sigunmask(task->tk_client, &oldset);
316 return ret;
317}
318
Trond Myklebuste7616922006-01-03 09:55:13 +0100319static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
320{
321 switch (open_flags) {
322 case FMODE_WRITE:
323 state->n_wronly++;
324 break;
325 case FMODE_READ:
326 state->n_rdonly++;
327 break;
328 case FMODE_READ|FMODE_WRITE:
329 state->n_rdwr++;
330 }
331}
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
334{
335 struct inode *inode = state->inode;
336
337 open_flags &= (FMODE_READ|FMODE_WRITE);
Trond Myklebustd5308382005-11-04 15:33:38 -0500338 /* Protect against nfs4_find_state_byowner() */
Trond Myklebustec073422005-10-20 14:22:47 -0700339 spin_lock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 spin_lock(&inode->i_lock);
Trond Myklebust4cecb762005-11-04 15:32:58 -0500341 memcpy(&state->stateid, stateid, sizeof(state->stateid));
Trond Myklebuste7616922006-01-03 09:55:13 +0100342 update_open_stateflags(state, open_flags);
Trond Myklebust4cecb762005-11-04 15:32:58 -0500343 nfs4_state_set_mode_locked(state, state->state | open_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 spin_unlock(&inode->i_lock);
Trond Myklebustec073422005-10-20 14:22:47 -0700345 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100348static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
349{
350 struct inode *inode;
351 struct nfs4_state *state = NULL;
352
353 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
354 goto out;
355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
Trond Myklebust03f28e32006-03-20 13:44:48 -0500356 if (IS_ERR(inode))
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100357 goto out;
358 state = nfs4_get_open_state(inode, data->owner);
359 if (state == NULL)
360 goto put_inode;
361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
362put_inode:
363 iput(inode);
364out:
365 return state;
366}
367
Trond Myklebust864472e2006-01-03 09:55:15 +0100368static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
369{
370 struct nfs_inode *nfsi = NFS_I(state->inode);
371 struct nfs_open_context *ctx;
372
373 spin_lock(&state->inode->i_lock);
374 list_for_each_entry(ctx, &nfsi->open_files, list) {
375 if (ctx->state != state)
376 continue;
377 get_nfs_open_context(ctx);
378 spin_unlock(&state->inode->i_lock);
379 return ctx;
380 }
381 spin_unlock(&state->inode->i_lock);
382 return ERR_PTR(-ENOENT);
383}
384
385static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
386{
387 int ret;
388
389 opendata->o_arg.open_flags = openflags;
390 ret = _nfs4_proc_open(opendata);
391 if (ret != 0)
392 return ret;
393 memcpy(stateid->data, opendata->o_res.stateid.data,
394 sizeof(stateid->data));
395 return 0;
396}
397
398static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
399{
400 nfs4_stateid stateid;
401 struct nfs4_state *newstate;
402 int mode = 0;
403 int delegation = 0;
404 int ret;
405
406 /* memory barrier prior to reading state->n_* */
407 smp_rmb();
408 if (state->n_rdwr != 0) {
409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
410 if (ret != 0)
411 return ret;
412 mode |= FMODE_READ|FMODE_WRITE;
413 if (opendata->o_res.delegation_type != 0)
414 delegation = opendata->o_res.delegation_type;
415 smp_rmb();
416 }
417 if (state->n_wronly != 0) {
418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
419 if (ret != 0)
420 return ret;
421 mode |= FMODE_WRITE;
422 if (opendata->o_res.delegation_type != 0)
423 delegation = opendata->o_res.delegation_type;
424 smp_rmb();
425 }
426 if (state->n_rdonly != 0) {
427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
428 if (ret != 0)
429 return ret;
430 mode |= FMODE_READ;
431 }
432 clear_bit(NFS_DELEGATED_STATE, &state->flags);
433 if (mode == 0)
434 return 0;
435 if (opendata->o_res.delegation_type == 0)
436 opendata->o_res.delegation_type = delegation;
437 opendata->o_arg.open_flags |= mode;
438 newstate = nfs4_opendata_to_nfs4_state(opendata);
439 if (newstate != NULL) {
440 if (opendata->o_res.delegation_type != 0) {
441 struct nfs_inode *nfsi = NFS_I(newstate->inode);
442 int delegation_flags = 0;
443 if (nfsi->delegation)
444 delegation_flags = nfsi->delegation->flags;
445 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
446 nfs_inode_set_delegation(newstate->inode,
447 opendata->owner->so_cred,
448 &opendata->o_res);
449 else
450 nfs_inode_reclaim_delegation(newstate->inode,
451 opendata->owner->so_cred,
452 &opendata->o_res);
453 }
454 nfs4_close_state(newstate, opendata->o_arg.open_flags);
455 }
456 if (newstate != state)
457 return -ESTALE;
458 return 0;
459}
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/*
462 * OPEN_RECLAIM:
463 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 */
Trond Myklebust864472e2006-01-03 09:55:15 +0100465static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466{
Trond Myklebust864472e2006-01-03 09:55:15 +0100467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
468 struct nfs4_opendata *opendata;
469 int delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 int status;
471
472 if (delegation != NULL) {
473 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
474 memcpy(&state->stateid, &delegation->stateid,
475 sizeof(state->stateid));
476 set_bit(NFS_DELEGATED_STATE, &state->flags);
477 return 0;
478 }
Trond Myklebust864472e2006-01-03 09:55:15 +0100479 delegation_type = delegation->type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 }
Trond Myklebust864472e2006-01-03 09:55:15 +0100481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
482 if (opendata == NULL)
Trond Myklebustcee54fc2005-10-18 14:20:12 -0700483 return -ENOMEM;
Trond Myklebust864472e2006-01-03 09:55:15 +0100484 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
485 opendata->o_arg.fh = NFS_FH(state->inode);
486 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
487 opendata->o_arg.u.delegation_type = delegation_type;
488 status = nfs4_open_recover(opendata, state);
489 nfs4_opendata_free(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 return status;
491}
492
Trond Myklebust864472e2006-01-03 09:55:15 +0100493static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494{
495 struct nfs_server *server = NFS_SERVER(state->inode);
496 struct nfs4_exception exception = { };
497 int err;
498 do {
Trond Myklebust864472e2006-01-03 09:55:15 +0100499 err = _nfs4_do_open_reclaim(sp, state, dentry);
Trond Myklebust202b50d2005-06-22 17:16:29 +0000500 if (err != -NFS4ERR_DELAY)
501 break;
502 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 } while (exception.retry);
504 return err;
505}
506
Trond Myklebust864472e2006-01-03 09:55:15 +0100507static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
508{
509 struct nfs_open_context *ctx;
510 int ret;
511
512 ctx = nfs4_state_find_open_context(state);
513 if (IS_ERR(ctx))
514 return PTR_ERR(ctx);
515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
516 put_nfs_open_context(ctx);
517 return ret;
518}
519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
521{
522 struct nfs4_state_owner *sp = state->owner;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100523 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +0100524 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust864472e2006-01-03 09:55:15 +0100527 return 0;
528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100529 if (opendata == NULL)
Trond Myklebust864472e2006-01-03 09:55:15 +0100530 return -ENOMEM;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
533 sizeof(opendata->o_arg.u.delegation.data));
Trond Myklebust864472e2006-01-03 09:55:15 +0100534 ret = nfs4_open_recover(opendata, state);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100535 nfs4_opendata_free(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100536 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537}
538
539int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
540{
541 struct nfs4_exception exception = { };
542 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
543 int err;
544 do {
545 err = _nfs4_open_delegation_recall(dentry, state);
546 switch (err) {
547 case 0:
548 return err;
549 case -NFS4ERR_STALE_CLIENTID:
550 case -NFS4ERR_STALE_STATEID:
551 case -NFS4ERR_EXPIRED:
552 /* Don't recall a delegation if it was lost */
David Howells7539bba2006-08-22 20:06:09 -0400553 nfs4_schedule_state_recovery(server->nfs_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 return err;
555 }
556 err = nfs4_handle_exception(server, err, &exception);
557 } while (exception.retry);
558 return err;
559}
560
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100561static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100563 struct nfs4_opendata *data = calldata;
564 struct rpc_message msg = {
565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
566 .rpc_argp = &data->c_arg,
567 .rpc_resp = &data->c_res,
568 .rpc_cred = data->owner->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 };
Trond Myklebust26e976a2006-01-03 09:55:21 +0100570 data->timestamp = jiffies;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100571 rpc_call_setup(task, &msg, 0);
572}
573
574static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
575{
576 struct nfs4_opendata *data = calldata;
577
578 data->rpc_status = task->tk_status;
579 if (RPC_ASSASSINATED(task))
580 return;
Trond Myklebust26e976a2006-01-03 09:55:21 +0100581 if (data->rpc_status == 0) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
583 sizeof(data->o_res.stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +0100584 renew_lease(data->o_res.server, data->timestamp);
585 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
588}
589
590static void nfs4_open_confirm_release(void *calldata)
591{
592 struct nfs4_opendata *data = calldata;
593 struct nfs4_state *state = NULL;
594
595 /* If this request hasn't been cancelled, do nothing */
596 if (data->cancelled == 0)
597 goto out_free;
598 /* In case of error, no cleanup! */
599 if (data->rpc_status != 0)
600 goto out_free;
601 nfs_confirm_seqid(&data->owner->so_seqid, 0);
602 state = nfs4_opendata_to_nfs4_state(data);
603 if (state != NULL)
604 nfs4_close_state(state, data->o_arg.open_flags);
605out_free:
606 nfs4_opendata_free(data);
607}
608
609static const struct rpc_call_ops nfs4_open_confirm_ops = {
610 .rpc_call_prepare = nfs4_open_confirm_prepare,
611 .rpc_call_done = nfs4_open_confirm_done,
612 .rpc_release = nfs4_open_confirm_release,
613};
614
615/*
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
617 */
618static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
619{
620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
621 struct rpc_task *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 int status;
623
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100624 atomic_inc(&data->count);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500625 /*
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
628 */
629 data->rpc_status = -ENOMEM;
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500631 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100632 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100633 status = nfs4_wait_for_completion_rpc_task(task);
634 if (status != 0) {
635 data->cancelled = 1;
636 smp_wmb();
637 } else
638 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -0500639 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 return status;
641}
642
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100643static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100645 struct nfs4_opendata *data = calldata;
646 struct nfs4_state_owner *sp = data->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 struct rpc_message msg = {
648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100649 .rpc_argp = &data->o_arg,
650 .rpc_resp = &data->o_res,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 .rpc_cred = sp->so_cred,
652 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100653
654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
655 return;
656 /* Update sequence id. */
657 data->o_arg.id = sp->so_id;
658 data->o_arg.clientid = sp->so_client->cl_clientid;
Trond Myklebust864472e2006-01-03 09:55:15 +0100659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust26e976a2006-01-03 09:55:21 +0100661 data->timestamp = jiffies;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100662 rpc_call_setup(task, &msg, 0);
663}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100665static void nfs4_open_done(struct rpc_task *task, void *calldata)
666{
667 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100669 data->rpc_status = task->tk_status;
670 if (RPC_ASSASSINATED(task))
671 return;
672 if (task->tk_status == 0) {
673 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -0700674 case S_IFREG:
675 break;
676 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100677 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700678 break;
679 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100680 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700681 break;
682 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100683 data->rpc_status = -ENOTDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -0700684 }
Trond Myklebust26e976a2006-01-03 09:55:21 +0100685 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust6f926b52005-10-18 14:20:18 -0700686 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
688}
Trond Myklebust6f926b52005-10-18 14:20:18 -0700689
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100690static void nfs4_open_release(void *calldata)
691{
692 struct nfs4_opendata *data = calldata;
693 struct nfs4_state *state = NULL;
694
695 /* If this request hasn't been cancelled, do nothing */
696 if (data->cancelled == 0)
697 goto out_free;
698 /* In case of error, no cleanup! */
699 if (data->rpc_status != 0)
700 goto out_free;
701 /* In case we need an open_confirm, no cleanup! */
702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
703 goto out_free;
704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
705 state = nfs4_opendata_to_nfs4_state(data);
706 if (state != NULL)
707 nfs4_close_state(state, data->o_arg.open_flags);
708out_free:
709 nfs4_opendata_free(data);
710}
711
712static const struct rpc_call_ops nfs4_open_ops = {
713 .rpc_call_prepare = nfs4_open_prepare,
714 .rpc_call_done = nfs4_open_done,
715 .rpc_release = nfs4_open_release,
716};
717
718/*
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
720 */
721static int _nfs4_proc_open(struct nfs4_opendata *data)
722{
723 struct inode *dir = data->dir->d_inode;
724 struct nfs_server *server = NFS_SERVER(dir);
725 struct nfs_openargs *o_arg = &data->o_arg;
726 struct nfs_openres *o_res = &data->o_res;
727 struct rpc_task *task;
728 int status;
729
730 atomic_inc(&data->count);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500731 /*
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
734 */
735 data->rpc_status = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -0500737 if (IS_ERR(task))
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100738 return PTR_ERR(task);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100739 status = nfs4_wait_for_completion_rpc_task(task);
740 if (status != 0) {
741 data->cancelled = 1;
742 smp_wmb();
743 } else
744 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -0500745 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100747 return status;
748
Trond Myklebust56ae19f2005-10-27 22:12:40 -0400749 if (o_arg->open_flags & O_CREAT) {
750 update_changeattr(dir, &o_res->cinfo);
751 nfs_post_op_update_inode(dir, o_res->dir_attr);
752 } else
753 nfs_refresh_inode(dir, o_res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +0100755 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100757 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
David Howells8fa5c002006-08-22 20:06:12 -0400761 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100762 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763}
764
765static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
766{
767 struct nfs_access_entry cache;
768 int mask = 0;
769 int status;
770
771 if (openflags & FMODE_READ)
772 mask |= MAY_READ;
773 if (openflags & FMODE_WRITE)
774 mask |= MAY_WRITE;
775 status = nfs_access_get_cached(inode, cred, &cache);
776 if (status == 0)
777 goto out;
778
779 /* Be clever: ask server to check for all possible rights */
780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
781 cache.cred = cred;
782 cache.jiffies = jiffies;
783 status = _nfs4_proc_access(inode, &cache);
784 if (status != 0)
785 return status;
786 nfs_access_add_cache(inode, &cache);
787out:
788 if ((cache.mask & mask) == mask)
789 return 0;
790 return -EACCES;
791}
792
Trond Myklebust58d97142006-01-03 09:55:24 +0100793int nfs4_recover_expired_lease(struct nfs_server *server)
794{
David Howells7539bba2006-08-22 20:06:09 -0400795 struct nfs_client *clp = server->nfs_client;
Trond Myklebust6b309542006-09-14 14:03:14 -0400796 int ret;
Trond Myklebust58d97142006-01-03 09:55:24 +0100797
Trond Myklebust6b309542006-09-14 14:03:14 -0400798 for (;;) {
799 ret = nfs4_wait_clnt_recover(server->client, clp);
800 if (ret != 0)
801 return ret;
802 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
803 break;
Trond Myklebust58d97142006-01-03 09:55:24 +0100804 nfs4_schedule_state_recovery(clp);
Trond Myklebust6b309542006-09-14 14:03:14 -0400805 }
806 return 0;
Trond Myklebust58d97142006-01-03 09:55:24 +0100807}
808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809/*
810 * OPEN_EXPIRED:
811 * reclaim state on the server after a network partition.
812 * Assumes caller holds the appropriate lock
813 */
814static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
815{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 struct inode *inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100818 struct nfs4_opendata *opendata;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100819 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
Trond Myklebust864472e2006-01-03 09:55:15 +0100820 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
Trond Myklebust864472e2006-01-03 09:55:15 +0100823 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
824 if (ret < 0)
825 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
827 set_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +0100828 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100830 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100831 if (opendata == NULL)
Trond Myklebust864472e2006-01-03 09:55:15 +0100832 return -ENOMEM;
833 ret = nfs4_open_recover(opendata, state);
834 if (ret == -ESTALE) {
835 /* Invalidate the state owner so we don't ever use it again */
836 nfs4_drop_state_owner(sp);
837 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 }
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100839 nfs4_opendata_free(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +0100840 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841}
842
Trond Myklebust202b50d2005-06-22 17:16:29 +0000843static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
844{
845 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
846 struct nfs4_exception exception = { };
847 int err;
848
849 do {
850 err = _nfs4_open_expired(sp, state, dentry);
851 if (err == -NFS4ERR_DELAY)
852 nfs4_handle_exception(server, err, &exception);
853 } while (exception.retry);
854 return err;
855}
856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
858{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +0100860 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
Trond Myklebust864472e2006-01-03 09:55:15 +0100862 ctx = nfs4_state_find_open_context(state);
863 if (IS_ERR(ctx))
864 return PTR_ERR(ctx);
865 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
866 put_nfs_open_context(ctx);
867 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868}
869
870/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100871 * Returns a referenced nfs4_state if there is an open delegation on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 */
873static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
874{
875 struct nfs_delegation *delegation;
876 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -0400877 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 struct nfs_inode *nfsi = NFS_I(inode);
879 struct nfs4_state_owner *sp = NULL;
880 struct nfs4_state *state = NULL;
881 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
882 int err;
883
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100884 err = -ENOMEM;
885 if (!(sp = nfs4_get_state_owner(server, cred))) {
886 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
887 return err;
888 }
Trond Myklebust58d97142006-01-03 09:55:24 +0100889 err = nfs4_recover_expired_lease(server);
890 if (err != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100891 goto out_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 /* Protect against reboot recovery - NOTE ORDER! */
893 down_read(&clp->cl_sem);
894 /* Protect against delegation recall */
895 down_read(&nfsi->rwsem);
896 delegation = NFS_I(inode)->delegation;
897 err = -ENOENT;
898 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
899 goto out_err;
900 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 state = nfs4_get_open_state(inode, sp);
902 if (state == NULL)
903 goto out_err;
904
905 err = -ENOENT;
906 if ((state->state & open_flags) == open_flags) {
907 spin_lock(&inode->i_lock);
Trond Myklebuste7616922006-01-03 09:55:13 +0100908 update_open_stateflags(state, open_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 spin_unlock(&inode->i_lock);
910 goto out_ok;
911 } else if (state->state != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100912 goto out_put_open_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
914 lock_kernel();
915 err = _nfs4_do_access(inode, cred, open_flags);
916 unlock_kernel();
917 if (err != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100918 goto out_put_open_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 set_bit(NFS_DELEGATED_STATE, &state->flags);
920 update_open_stateid(state, &delegation->stateid, open_flags);
921out_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 nfs4_put_state_owner(sp);
923 up_read(&nfsi->rwsem);
924 up_read(&clp->cl_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 *res = state;
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100926 return 0;
927out_put_open_state:
928 nfs4_put_open_state(state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 up_read(&nfsi->rwsem);
931 up_read(&clp->cl_sem);
Trond Myklebustb8e5c4c2005-10-18 14:20:20 -0700932 if (err != -EACCES)
933 nfs_inode_return_delegation(inode);
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100934out_put_state_owner:
935 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 return err;
937}
938
939static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
940{
941 struct nfs4_exception exception = { };
Trond Myklebusta162a6b2006-03-20 13:44:10 -0500942 struct nfs4_state *res = ERR_PTR(-EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 int err;
944
945 do {
946 err = _nfs4_open_delegated(inode, flags, cred, &res);
947 if (err == 0)
948 break;
949 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
950 err, &exception));
951 } while (exception.retry);
952 return res;
953}
954
955/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100956 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 */
958static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
959{
960 struct nfs4_state_owner *sp;
961 struct nfs4_state *state = NULL;
962 struct nfs_server *server = NFS_SERVER(dir);
David Howells7539bba2006-08-22 20:06:09 -0400963 struct nfs_client *clp = server->nfs_client;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100964 struct nfs4_opendata *opendata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
967 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 status = -ENOMEM;
969 if (!(sp = nfs4_get_state_owner(server, cred))) {
970 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
971 goto out_err;
972 }
Trond Myklebust58d97142006-01-03 09:55:24 +0100973 status = nfs4_recover_expired_lease(server);
974 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100975 goto err_put_state_owner;
Trond Myklebust58d97142006-01-03 09:55:24 +0100976 down_read(&clp->cl_sem);
977 status = -ENOMEM;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100978 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
979 if (opendata == NULL)
Trond Myklebust76723de2006-09-15 08:11:51 -0400980 goto err_release_rwsem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100982 status = _nfs4_proc_open(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 if (status != 0)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100984 goto err_opendata_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
986 status = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100987 state = nfs4_opendata_to_nfs4_state(opendata);
988 if (state == NULL)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100989 goto err_opendata_free;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100990 if (opendata->o_res.delegation_type != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +0100991 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100992 nfs4_opendata_free(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 nfs4_put_state_owner(sp);
994 up_read(&clp->cl_sem);
995 *res = state;
996 return 0;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100997err_opendata_free:
998 nfs4_opendata_free(opendata);
Trond Myklebust76723de2006-09-15 08:11:51 -0400999err_release_rwsem:
1000 up_read(&clp->cl_sem);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001001err_put_state_owner:
1002 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 *res = NULL;
1005 return status;
1006}
1007
1008
1009static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1010{
1011 struct nfs4_exception exception = { };
1012 struct nfs4_state *res;
1013 int status;
1014
1015 do {
1016 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1017 if (status == 0)
1018 break;
1019 /* NOTE: BAD_SEQID means the server and client disagree about the
1020 * book-keeping w.r.t. state-changing operations
1021 * (OPEN/CLOSE/LOCK/LOCKU...)
1022 * It is actually a sign of a bug on the client or on the server.
1023 *
1024 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001025 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 * have unhashed the old state_owner for us, and that we can
1027 * therefore safely retry using a new one. We should still warn
1028 * the user though...
1029 */
1030 if (status == -NFS4ERR_BAD_SEQID) {
1031 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1032 exception.retry = 1;
1033 continue;
1034 }
Trond Myklebust550f5742005-10-18 14:20:21 -07001035 /*
1036 * BAD_STATEID on OPEN means that the server cancelled our
1037 * state before it received the OPEN_CONFIRM.
1038 * Recover by retrying the request as per the discussion
1039 * on Page 181 of RFC3530.
1040 */
1041 if (status == -NFS4ERR_BAD_STATEID) {
1042 exception.retry = 1;
1043 continue;
1044 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1046 status, &exception));
1047 } while (exception.retry);
1048 return res;
1049}
1050
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001051static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1052 struct iattr *sattr, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001054 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001056 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 .iap = sattr,
1058 .server = server,
1059 .bitmask = server->attr_bitmask,
1060 };
1061 struct nfs_setattrres res = {
1062 .fattr = fattr,
1063 .server = server,
1064 };
1065 struct rpc_message msg = {
1066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1067 .rpc_argp = &arg,
1068 .rpc_resp = &res,
1069 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01001070 unsigned long timestamp = jiffies;
Trond Myklebust65e43082005-08-16 11:49:44 -04001071 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
Trond Myklebust0e574af2005-10-27 22:12:38 -04001073 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001075 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1076 /* Use that stateid */
1077 } else if (state != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 msg.rpc_cred = state->owner->so_cred;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001079 nfs4_copy_stateid(&arg.stateid, state, current->files);
1080 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1082
Trond Myklebust65e43082005-08-16 11:49:44 -04001083 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001084 if (status == 0 && state != NULL)
1085 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04001086 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087}
1088
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001089static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1090 struct iattr *sattr, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001092 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 struct nfs4_exception exception = { };
1094 int err;
1095 do {
1096 err = nfs4_handle_exception(server,
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001097 _nfs4_do_setattr(inode, fattr, sattr, state),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 &exception);
1099 } while (exception.retry);
1100 return err;
1101}
1102
1103struct nfs4_closedata {
1104 struct inode *inode;
1105 struct nfs4_state *state;
1106 struct nfs_closeargs arg;
1107 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001108 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001109 unsigned long timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110};
1111
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001112static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07001113{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001114 struct nfs4_closedata *calldata = data;
1115 struct nfs4_state_owner *sp = calldata->state->owner;
Trond Myklebust95121352005-10-18 14:20:12 -07001116
1117 nfs4_put_open_state(calldata->state);
1118 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001119 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07001120 kfree(calldata);
1121}
1122
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001123static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001125 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 struct nfs_server *server = NFS_SERVER(calldata->inode);
1128
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001129 if (RPC_ASSASSINATED(task))
1130 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 /* hmm. we are done with the inode, and in the process of freeing
1132 * the state_owner. we keep this around to process errors
1133 */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001134 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 switch (task->tk_status) {
1136 case 0:
1137 memcpy(&state->stateid, &calldata->res.stateid,
1138 sizeof(state->stateid));
Trond Myklebust26e976a2006-01-03 09:55:21 +01001139 renew_lease(server, calldata->timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 break;
1141 case -NFS4ERR_STALE_STATEID:
1142 case -NFS4ERR_EXPIRED:
David Howells7539bba2006-08-22 20:06:09 -04001143 nfs4_schedule_state_recovery(server->nfs_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 break;
1145 default:
1146 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1147 rpc_restart_call(task);
1148 return;
1149 }
1150 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001151 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152}
1153
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001154static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001156 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07001157 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 struct rpc_message msg = {
1159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1160 .rpc_argp = &calldata->arg,
1161 .rpc_resp = &calldata->res,
Trond Myklebust95121352005-10-18 14:20:12 -07001162 .rpc_cred = state->owner->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 };
Trond Myklebust4cecb762005-11-04 15:32:58 -05001164 int mode = 0, old_mode;
Trond Myklebust95121352005-10-18 14:20:12 -07001165
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001166 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebust95121352005-10-18 14:20:12 -07001167 return;
Trond Myklebust95121352005-10-18 14:20:12 -07001168 /* Recalculate the new open mode in case someone reopened the file
1169 * while we were waiting in line to be scheduled.
1170 */
Trond Myklebust4cecb762005-11-04 15:32:58 -05001171 spin_lock(&state->owner->so_lock);
1172 spin_lock(&calldata->inode->i_lock);
1173 mode = old_mode = state->state;
Trond Myklebuste7616922006-01-03 09:55:13 +01001174 if (state->n_rdwr == 0) {
1175 if (state->n_rdonly == 0)
1176 mode &= ~FMODE_READ;
1177 if (state->n_wronly == 0)
1178 mode &= ~FMODE_WRITE;
1179 }
Trond Myklebust4cecb762005-11-04 15:32:58 -05001180 nfs4_state_set_mode_locked(state, mode);
1181 spin_unlock(&calldata->inode->i_lock);
1182 spin_unlock(&state->owner->so_lock);
1183 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001184 /* Note: exit _without_ calling nfs4_close_done */
1185 task->tk_action = NULL;
Trond Myklebust95121352005-10-18 14:20:12 -07001186 return;
1187 }
Trond Myklebust516a6af2005-10-27 22:12:41 -04001188 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust95121352005-10-18 14:20:12 -07001189 if (mode != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
Trond Myklebust95121352005-10-18 14:20:12 -07001191 calldata->arg.open_flags = mode;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001192 calldata->timestamp = jiffies;
Trond Myklebust95121352005-10-18 14:20:12 -07001193 rpc_call_setup(task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194}
1195
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001196static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001197 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01001198 .rpc_call_done = nfs4_close_done,
1199 .rpc_release = nfs4_free_closedata,
1200};
1201
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202/*
1203 * It is possible for data to be read/written from a mem-mapped file
1204 * after the sys_close call (which hits the vfs layer as a flush).
1205 * This means that we can't safely call nfsv4 close on a file until
1206 * the inode is cleared. This in turn means that we are not good
1207 * NFSv4 citizens - we do not indicate to the server to update the file's
1208 * share state even when we are done with one of the three share
1209 * stateid's in the inode.
1210 *
1211 * NOTE: Caller must be holding the sp->so_owner semaphore!
1212 */
Trond Myklebust4cecb762005-11-04 15:32:58 -05001213int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214{
Trond Myklebust516a6af2005-10-27 22:12:41 -04001215 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 struct nfs4_closedata *calldata;
Trond Myklebust95121352005-10-18 14:20:12 -07001217 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218
Trond Myklebust95121352005-10-18 14:20:12 -07001219 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07001221 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 calldata->inode = inode;
1223 calldata->state = state;
1224 calldata->arg.fh = NFS_FH(inode);
Trond Myklebust95121352005-10-18 14:20:12 -07001225 calldata->arg.stateid = &state->stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 /* Serialization for the sequence id */
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001227 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07001228 if (calldata->arg.seqid == NULL)
1229 goto out_free_calldata;
Trond Myklebust516a6af2005-10-27 22:12:41 -04001230 calldata->arg.bitmask = server->attr_bitmask;
1231 calldata->res.fattr = &calldata->fattr;
1232 calldata->res.server = server;
Trond Myklebust95121352005-10-18 14:20:12 -07001233
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01001234 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
Trond Myklebust95121352005-10-18 14:20:12 -07001235 if (status == 0)
1236 goto out;
1237
1238 nfs_free_seqid(calldata->arg.seqid);
1239out_free_calldata:
1240 kfree(calldata);
1241out:
1242 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243}
1244
Trond Myklebust95cf9592006-04-18 13:14:06 -04001245static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
Trond Myklebust02a913a2005-10-18 14:20:17 -07001246{
1247 struct file *filp;
1248
1249 filp = lookup_instantiate_filp(nd, dentry, NULL);
1250 if (!IS_ERR(filp)) {
1251 struct nfs_open_context *ctx;
1252 ctx = (struct nfs_open_context *)filp->private_data;
1253 ctx->state = state;
Trond Myklebust95cf9592006-04-18 13:14:06 -04001254 return 0;
1255 }
1256 nfs4_close_state(state, nd->intent.open.flags);
1257 return PTR_ERR(filp);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001258}
1259
1260struct dentry *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1262{
1263 struct iattr attr;
1264 struct rpc_cred *cred;
1265 struct nfs4_state *state;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001266 struct dentry *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
1268 if (nd->flags & LOOKUP_CREATE) {
1269 attr.ia_mode = nd->intent.open.create_mode;
1270 attr.ia_valid = ATTR_MODE;
1271 if (!IS_POSIXACL(dir))
1272 attr.ia_mode &= ~current->fs->umask;
1273 } else {
1274 attr.ia_valid = 0;
1275 BUG_ON(nd->intent.open.flags & O_CREAT);
1276 }
1277
David Howells1f163412006-08-22 20:06:11 -04001278 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 if (IS_ERR(cred))
Trond Myklebust02a913a2005-10-18 14:20:17 -07001280 return (struct dentry *)cred;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1282 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001283 if (IS_ERR(state)) {
1284 if (PTR_ERR(state) == -ENOENT)
1285 d_add(dentry, NULL);
1286 return (struct dentry *)state;
1287 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001288 res = d_add_unique(dentry, igrab(state->inode));
Trond Myklebust02a913a2005-10-18 14:20:17 -07001289 if (res != NULL)
1290 dentry = res;
1291 nfs4_intent_set_file(nd, dentry, state);
1292 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293}
1294
1295int
Trond Myklebust02a913a2005-10-18 14:20:17 -07001296nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297{
1298 struct rpc_cred *cred;
1299 struct nfs4_state *state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
David Howells1f163412006-08-22 20:06:11 -04001301 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 if (IS_ERR(cred))
1303 return PTR_ERR(cred);
1304 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1305 if (IS_ERR(state))
1306 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1307 put_rpccred(cred);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001308 if (IS_ERR(state)) {
1309 switch (PTR_ERR(state)) {
1310 case -EPERM:
1311 case -EACCES:
1312 case -EDQUOT:
1313 case -ENOSPC:
1314 case -EROFS:
1315 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1316 return 1;
Chuck Leverb87c0ad2006-10-19 23:28:42 -07001317 default:
1318 goto out_drop;
Trond Myklebust02a913a2005-10-18 14:20:17 -07001319 }
Trond Myklebust02a913a2005-10-18 14:20:17 -07001320 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001321 if (state->inode == dentry->d_inode) {
Trond Myklebust02a913a2005-10-18 14:20:17 -07001322 nfs4_intent_set_file(nd, dentry, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 return 1;
1324 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 nfs4_close_state(state, openflags);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001326out_drop:
1327 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 return 0;
1329}
1330
1331
1332static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1333{
1334 struct nfs4_server_caps_res res = {};
1335 struct rpc_message msg = {
1336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1337 .rpc_argp = fhandle,
1338 .rpc_resp = &res,
1339 };
1340 int status;
1341
1342 status = rpc_call_sync(server->client, &msg, 0);
1343 if (status == 0) {
1344 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1345 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1346 server->caps |= NFS_CAP_ACLS;
1347 if (res.has_links != 0)
1348 server->caps |= NFS_CAP_HARDLINKS;
1349 if (res.has_symlinks != 0)
1350 server->caps |= NFS_CAP_SYMLINKS;
1351 server->acl_bitmask = res.acl_bitmask;
1352 }
1353 return status;
1354}
1355
Trond Myklebust55a97592006-06-09 09:34:19 -04001356int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357{
1358 struct nfs4_exception exception = { };
1359 int err;
1360 do {
1361 err = nfs4_handle_exception(server,
1362 _nfs4_server_capabilities(server, fhandle),
1363 &exception);
1364 } while (exception.retry);
1365 return err;
1366}
1367
1368static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1369 struct nfs_fsinfo *info)
1370{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 struct nfs4_lookup_root_arg args = {
1372 .bitmask = nfs4_fattr_bitmap,
1373 };
1374 struct nfs4_lookup_res res = {
1375 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04001376 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 .fh = fhandle,
1378 };
1379 struct rpc_message msg = {
1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1381 .rpc_argp = &args,
1382 .rpc_resp = &res,
1383 };
Trond Myklebust0e574af2005-10-27 22:12:38 -04001384 nfs_fattr_init(info->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 return rpc_call_sync(server->client, &msg, 0);
1386}
1387
1388static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1389 struct nfs_fsinfo *info)
1390{
1391 struct nfs4_exception exception = { };
1392 int err;
1393 do {
1394 err = nfs4_handle_exception(server,
1395 _nfs4_lookup_root(server, fhandle, info),
1396 &exception);
1397 } while (exception.retry);
1398 return err;
1399}
1400
David Howells54ceac42006-08-22 20:06:13 -04001401/*
1402 * get the file handle for the "/" directory on the server
1403 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04001405 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 int status;
1408
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 status = nfs4_lookup_root(server, fhandle, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 if (status == 0)
1411 status = nfs4_server_capabilities(server, fhandle);
1412 if (status == 0)
1413 status = nfs4_do_fsinfo(server, fhandle, info);
Trond Myklebustc12e87f2006-03-13 21:20:47 -08001414 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415}
1416
Manoj Naik6b97fd32006-06-09 09:34:29 -04001417/*
1418 * Get locations and (maybe) other attributes of a referral.
1419 * Note that we'll actually follow the referral later when
1420 * we detect fsid mismatch in inode revalidation
1421 */
1422static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1423{
1424 int status = -ENOMEM;
1425 struct page *page = NULL;
1426 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04001427
1428 page = alloc_page(GFP_KERNEL);
1429 if (page == NULL)
1430 goto out;
1431 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1432 if (locations == NULL)
1433 goto out;
1434
Trond Myklebustc228fd32007-01-13 02:28:11 -05001435 status = nfs4_proc_fs_locations(dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001436 if (status != 0)
1437 goto out;
1438 /* Make sure server returned a different fsid for the referral */
1439 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1440 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1441 status = -EIO;
1442 goto out;
1443 }
1444
1445 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1446 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1447 if (!fattr->mode)
1448 fattr->mode = S_IFDIR;
1449 memset(fhandle, 0, sizeof(struct nfs_fh));
1450out:
1451 if (page)
1452 __free_page(page);
1453 if (locations)
1454 kfree(locations);
1455 return status;
1456}
1457
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1459{
1460 struct nfs4_getattr_arg args = {
1461 .fh = fhandle,
1462 .bitmask = server->attr_bitmask,
1463 };
1464 struct nfs4_getattr_res res = {
1465 .fattr = fattr,
1466 .server = server,
1467 };
1468 struct rpc_message msg = {
1469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1470 .rpc_argp = &args,
1471 .rpc_resp = &res,
1472 };
1473
Trond Myklebust0e574af2005-10-27 22:12:38 -04001474 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 return rpc_call_sync(server->client, &msg, 0);
1476}
1477
1478static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1479{
1480 struct nfs4_exception exception = { };
1481 int err;
1482 do {
1483 err = nfs4_handle_exception(server,
1484 _nfs4_proc_getattr(server, fhandle, fattr),
1485 &exception);
1486 } while (exception.retry);
1487 return err;
1488}
1489
1490/*
1491 * The file is not closed if it is opened due to the a request to change
1492 * the size of the file. The open call will not be needed once the
1493 * VFS layer lookup-intents are implemented.
1494 *
1495 * Close is called when the inode is destroyed.
1496 * If we haven't opened the file for O_WRONLY, we
1497 * need to in the size_change case to obtain a stateid.
1498 *
1499 * Got race?
1500 * Because OPEN is always done by name in nfsv4, it is
1501 * possible that we opened a different file by the same
1502 * name. We can recognize this race condition, but we
1503 * can't do anything about it besides returning an error.
1504 *
1505 * This will be fixed with VFS changes (lookup-intent).
1506 */
1507static int
1508nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1509 struct iattr *sattr)
1510{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001511 struct rpc_cred *cred;
1512 struct inode *inode = dentry->d_inode;
Trond Myklebustd5308382005-11-04 15:33:38 -05001513 struct nfs_open_context *ctx;
1514 struct nfs4_state *state = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 int status;
1516
Trond Myklebust0e574af2005-10-27 22:12:38 -04001517 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518
David Howells1f163412006-08-22 20:06:11 -04001519 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001520 if (IS_ERR(cred))
1521 return PTR_ERR(cred);
Trond Myklebustd5308382005-11-04 15:33:38 -05001522
1523 /* Search for an existing open(O_WRITE) file */
1524 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1525 if (ctx != NULL)
1526 state = ctx->state;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001527
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001528 status = nfs4_do_setattr(inode, fattr, sattr, state);
Trond Myklebust65e43082005-08-16 11:49:44 -04001529 if (status == 0)
1530 nfs_setattr_update_inode(inode, sattr);
Trond Myklebustd5308382005-11-04 15:33:38 -05001531 if (ctx != NULL)
1532 put_nfs_open_context(ctx);
Trond Myklebust08e9eac2005-06-22 17:16:29 +00001533 put_rpccred(cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 return status;
1535}
1536
David Howells2b3de442006-08-22 20:06:09 -04001537static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1538 struct qstr *name, struct nfs_fh *fhandle,
1539 struct nfs_fattr *fattr)
1540{
1541 int status;
1542 struct nfs4_lookup_arg args = {
1543 .bitmask = server->attr_bitmask,
1544 .dir_fh = dirfh,
1545 .name = name,
1546 };
1547 struct nfs4_lookup_res res = {
1548 .server = server,
1549 .fattr = fattr,
1550 .fh = fhandle,
1551 };
1552 struct rpc_message msg = {
1553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1554 .rpc_argp = &args,
1555 .rpc_resp = &res,
1556 };
1557
1558 nfs_fattr_init(fattr);
1559
1560 dprintk("NFS call lookupfh %s\n", name->name);
1561 status = rpc_call_sync(server->client, &msg, 0);
1562 dprintk("NFS reply lookupfh: %d\n", status);
1563 if (status == -NFS4ERR_MOVED)
1564 status = -EREMOTE;
1565 return status;
1566}
1567
1568static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1569 struct qstr *name, struct nfs_fh *fhandle,
1570 struct nfs_fattr *fattr)
1571{
1572 struct nfs4_exception exception = { };
1573 int err;
1574 do {
1575 err = nfs4_handle_exception(server,
1576 _nfs4_proc_lookupfh(server, dirfh, name,
1577 fhandle, fattr),
1578 &exception);
1579 } while (exception.retry);
1580 return err;
1581}
1582
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1584 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1585{
1586 int status;
1587 struct nfs_server *server = NFS_SERVER(dir);
1588 struct nfs4_lookup_arg args = {
1589 .bitmask = server->attr_bitmask,
1590 .dir_fh = NFS_FH(dir),
1591 .name = name,
1592 };
1593 struct nfs4_lookup_res res = {
1594 .server = server,
1595 .fattr = fattr,
1596 .fh = fhandle,
1597 };
1598 struct rpc_message msg = {
1599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1600 .rpc_argp = &args,
1601 .rpc_resp = &res,
1602 };
1603
Trond Myklebust0e574af2005-10-27 22:12:38 -04001604 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605
1606 dprintk("NFS call lookup %s\n", name->name);
1607 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Manoj Naik6b97fd32006-06-09 09:34:29 -04001608 if (status == -NFS4ERR_MOVED)
1609 status = nfs4_get_referral(dir, name, fattr, fhandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 dprintk("NFS reply lookup: %d\n", status);
1611 return status;
1612}
1613
1614static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1615{
1616 struct nfs4_exception exception = { };
1617 int err;
1618 do {
1619 err = nfs4_handle_exception(NFS_SERVER(dir),
1620 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1621 &exception);
1622 } while (exception.retry);
1623 return err;
1624}
1625
1626static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1627{
1628 struct nfs4_accessargs args = {
1629 .fh = NFS_FH(inode),
1630 };
1631 struct nfs4_accessres res = { 0 };
1632 struct rpc_message msg = {
1633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1634 .rpc_argp = &args,
1635 .rpc_resp = &res,
1636 .rpc_cred = entry->cred,
1637 };
1638 int mode = entry->mask;
1639 int status;
1640
1641 /*
1642 * Determine which access bits we want to ask for...
1643 */
1644 if (mode & MAY_READ)
1645 args.access |= NFS4_ACCESS_READ;
1646 if (S_ISDIR(inode->i_mode)) {
1647 if (mode & MAY_WRITE)
1648 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1649 if (mode & MAY_EXEC)
1650 args.access |= NFS4_ACCESS_LOOKUP;
1651 } else {
1652 if (mode & MAY_WRITE)
1653 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1654 if (mode & MAY_EXEC)
1655 args.access |= NFS4_ACCESS_EXECUTE;
1656 }
1657 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1658 if (!status) {
1659 entry->mask = 0;
1660 if (res.access & NFS4_ACCESS_READ)
1661 entry->mask |= MAY_READ;
1662 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1663 entry->mask |= MAY_WRITE;
1664 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1665 entry->mask |= MAY_EXEC;
1666 }
1667 return status;
1668}
1669
1670static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1671{
1672 struct nfs4_exception exception = { };
1673 int err;
1674 do {
1675 err = nfs4_handle_exception(NFS_SERVER(inode),
1676 _nfs4_proc_access(inode, entry),
1677 &exception);
1678 } while (exception.retry);
1679 return err;
1680}
1681
1682/*
1683 * TODO: For the time being, we don't try to get any attributes
1684 * along with any of the zero-copy operations READ, READDIR,
1685 * READLINK, WRITE.
1686 *
1687 * In the case of the first three, we want to put the GETATTR
1688 * after the read-type operation -- this is because it is hard
1689 * to predict the length of a GETATTR response in v4, and thus
1690 * align the READ data correctly. This means that the GETATTR
1691 * may end up partially falling into the page cache, and we should
1692 * shift it into the 'tail' of the xdr_buf before processing.
1693 * To do this efficiently, we need to know the total length
1694 * of data received, which doesn't seem to be available outside
1695 * of the RPC layer.
1696 *
1697 * In the case of WRITE, we also want to put the GETATTR after
1698 * the operation -- in this case because we want to make sure
1699 * we get the post-operation mtime and size. This means that
1700 * we can't use xdr_encode_pages() as written: we need a variant
1701 * of it which would leave room in the 'tail' iovec.
1702 *
1703 * Both of these changes to the XDR layer would in fact be quite
1704 * minor, but I decided to leave them for a subsequent patch.
1705 */
1706static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1707 unsigned int pgbase, unsigned int pglen)
1708{
1709 struct nfs4_readlink args = {
1710 .fh = NFS_FH(inode),
1711 .pgbase = pgbase,
1712 .pglen = pglen,
1713 .pages = &page,
1714 };
1715 struct rpc_message msg = {
1716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1717 .rpc_argp = &args,
1718 .rpc_resp = NULL,
1719 };
1720
1721 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1722}
1723
1724static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1725 unsigned int pgbase, unsigned int pglen)
1726{
1727 struct nfs4_exception exception = { };
1728 int err;
1729 do {
1730 err = nfs4_handle_exception(NFS_SERVER(inode),
1731 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1732 &exception);
1733 } while (exception.retry);
1734 return err;
1735}
1736
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737/*
1738 * Got race?
1739 * We will need to arrange for the VFS layer to provide an atomic open.
1740 * Until then, this create/open method is prone to inefficiency and race
1741 * conditions due to the lookup, create, and open VFS calls from sys_open()
1742 * placed on the wire.
1743 *
1744 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1745 * The file will be opened again in the subsequent VFS open call
1746 * (nfs4_proc_file_open).
1747 *
1748 * The open for read will just hang around to be used by any process that
1749 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1750 */
1751
1752static int
1753nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Trond Myklebust02a913a2005-10-18 14:20:17 -07001754 int flags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755{
1756 struct nfs4_state *state;
1757 struct rpc_cred *cred;
1758 int status = 0;
1759
David Howells1f163412006-08-22 20:06:11 -04001760 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 if (IS_ERR(cred)) {
1762 status = PTR_ERR(cred);
1763 goto out;
1764 }
1765 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1766 put_rpccred(cred);
1767 if (IS_ERR(state)) {
1768 status = PTR_ERR(state);
1769 goto out;
1770 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001771 d_instantiate(dentry, igrab(state->inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 if (flags & O_EXCL) {
1773 struct nfs_fattr fattr;
Trond Myklebust3e4f6292006-03-20 13:44:46 -05001774 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001775 if (status == 0)
Trond Myklebust65e43082005-08-16 11:49:44 -04001776 nfs_setattr_update_inode(state->inode, sattr);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001777 }
1778 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
Trond Myklebust95cf9592006-04-18 13:14:06 -04001779 status = nfs4_intent_set_file(nd, dentry, state);
Trond Myklebust02a913a2005-10-18 14:20:17 -07001780 else
1781 nfs4_close_state(state, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782out:
1783 return status;
1784}
1785
1786static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1787{
Trond Myklebust16e42952005-10-27 22:12:44 -04001788 struct nfs_server *server = NFS_SERVER(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 struct nfs4_remove_arg args = {
1790 .fh = NFS_FH(dir),
1791 .name = name,
Trond Myklebust16e42952005-10-27 22:12:44 -04001792 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 };
Trond Myklebust16e42952005-10-27 22:12:44 -04001794 struct nfs_fattr dir_attr;
1795 struct nfs4_remove_res res = {
1796 .server = server,
1797 .dir_attr = &dir_attr,
1798 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 struct rpc_message msg = {
1800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1801 .rpc_argp = &args,
1802 .rpc_resp = &res,
1803 };
1804 int status;
1805
Trond Myklebust16e42952005-10-27 22:12:44 -04001806 nfs_fattr_init(res.dir_attr);
1807 status = rpc_call_sync(server->client, &msg, 0);
1808 if (status == 0) {
1809 update_changeattr(dir, &res.cinfo);
1810 nfs_post_op_update_inode(dir, res.dir_attr);
1811 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 return status;
1813}
1814
1815static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1816{
1817 struct nfs4_exception exception = { };
1818 int err;
1819 do {
1820 err = nfs4_handle_exception(NFS_SERVER(dir),
1821 _nfs4_proc_remove(dir, name),
1822 &exception);
1823 } while (exception.retry);
1824 return err;
1825}
1826
1827struct unlink_desc {
1828 struct nfs4_remove_arg args;
Trond Myklebust16e42952005-10-27 22:12:44 -04001829 struct nfs4_remove_res res;
1830 struct nfs_fattr dir_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831};
1832
1833static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1834 struct qstr *name)
1835{
Trond Myklebust16e42952005-10-27 22:12:44 -04001836 struct nfs_server *server = NFS_SERVER(dir->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837 struct unlink_desc *up;
1838
Robert P. J. Day5cbded52006-12-13 00:35:56 -08001839 up = kmalloc(sizeof(*up), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 if (!up)
1841 return -ENOMEM;
1842
1843 up->args.fh = NFS_FH(dir->d_inode);
1844 up->args.name = name;
Trond Myklebust16e42952005-10-27 22:12:44 -04001845 up->args.bitmask = server->attr_bitmask;
1846 up->res.server = server;
1847 up->res.dir_attr = &up->dir_attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
1849 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1850 msg->rpc_argp = &up->args;
1851 msg->rpc_resp = &up->res;
1852 return 0;
1853}
1854
1855static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1856{
1857 struct rpc_message *msg = &task->tk_msg;
1858 struct unlink_desc *up;
1859
1860 if (msg->rpc_resp != NULL) {
1861 up = container_of(msg->rpc_resp, struct unlink_desc, res);
Trond Myklebust16e42952005-10-27 22:12:44 -04001862 update_changeattr(dir->d_inode, &up->res.cinfo);
1863 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 kfree(up);
1865 msg->rpc_resp = NULL;
1866 msg->rpc_argp = NULL;
1867 }
1868 return 0;
1869}
1870
1871static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1872 struct inode *new_dir, struct qstr *new_name)
1873{
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001874 struct nfs_server *server = NFS_SERVER(old_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 struct nfs4_rename_arg arg = {
1876 .old_dir = NFS_FH(old_dir),
1877 .new_dir = NFS_FH(new_dir),
1878 .old_name = old_name,
1879 .new_name = new_name,
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001880 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 };
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001882 struct nfs_fattr old_fattr, new_fattr;
1883 struct nfs4_rename_res res = {
1884 .server = server,
1885 .old_fattr = &old_fattr,
1886 .new_fattr = &new_fattr,
1887 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 struct rpc_message msg = {
1889 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1890 .rpc_argp = &arg,
1891 .rpc_resp = &res,
1892 };
1893 int status;
1894
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001895 nfs_fattr_init(res.old_fattr);
1896 nfs_fattr_init(res.new_fattr);
1897 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898
1899 if (!status) {
1900 update_changeattr(old_dir, &res.old_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001901 nfs_post_op_update_inode(old_dir, res.old_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 update_changeattr(new_dir, &res.new_cinfo);
Trond Myklebust6caf2c82005-10-27 22:12:43 -04001903 nfs_post_op_update_inode(new_dir, res.new_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 }
1905 return status;
1906}
1907
1908static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1909 struct inode *new_dir, struct qstr *new_name)
1910{
1911 struct nfs4_exception exception = { };
1912 int err;
1913 do {
1914 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1915 _nfs4_proc_rename(old_dir, old_name,
1916 new_dir, new_name),
1917 &exception);
1918 } while (exception.retry);
1919 return err;
1920}
1921
1922static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1923{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04001924 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 struct nfs4_link_arg arg = {
1926 .fh = NFS_FH(inode),
1927 .dir_fh = NFS_FH(dir),
1928 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04001929 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04001931 struct nfs_fattr fattr, dir_attr;
1932 struct nfs4_link_res res = {
1933 .server = server,
1934 .fattr = &fattr,
1935 .dir_attr = &dir_attr,
1936 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 struct rpc_message msg = {
1938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1939 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04001940 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 };
1942 int status;
1943
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04001944 nfs_fattr_init(res.fattr);
1945 nfs_fattr_init(res.dir_attr);
1946 status = rpc_call_sync(server->client, &msg, 0);
1947 if (!status) {
1948 update_changeattr(dir, &res.cinfo);
1949 nfs_post_op_update_inode(dir, res.dir_attr);
Trond Myklebust73a3d072006-05-25 01:40:47 -04001950 nfs_post_op_update_inode(inode, res.fattr);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04001951 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952
1953 return status;
1954}
1955
1956static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1957{
1958 struct nfs4_exception exception = { };
1959 int err;
1960 do {
1961 err = nfs4_handle_exception(NFS_SERVER(inode),
1962 _nfs4_proc_link(inode, dir, name),
1963 &exception);
1964 } while (exception.retry);
1965 return err;
1966}
1967
Chuck Lever4f390c12006-08-22 20:06:22 -04001968static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04001969 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970{
1971 struct nfs_server *server = NFS_SERVER(dir);
Chuck Lever4f390c12006-08-22 20:06:22 -04001972 struct nfs_fh fhandle;
1973 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 struct nfs4_create_arg arg = {
1975 .dir_fh = NFS_FH(dir),
1976 .server = server,
Chuck Lever4f390c12006-08-22 20:06:22 -04001977 .name = &dentry->d_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 .attrs = sattr,
1979 .ftype = NF4LNK,
1980 .bitmask = server->attr_bitmask,
1981 };
1982 struct nfs4_create_res res = {
1983 .server = server,
Chuck Lever4f390c12006-08-22 20:06:22 -04001984 .fh = &fhandle,
1985 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04001986 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 };
1988 struct rpc_message msg = {
1989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1990 .rpc_argp = &arg,
1991 .rpc_resp = &res,
1992 };
1993 int status;
1994
Chuck Lever94a6d752006-08-22 20:06:23 -04001995 if (len > NFS4_MAXPATHLEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 return -ENAMETOOLONG;
Chuck Lever4f390c12006-08-22 20:06:22 -04001997
Chuck Lever94a6d752006-08-22 20:06:23 -04001998 arg.u.symlink.pages = &page;
1999 arg.u.symlink.len = len;
Chuck Lever4f390c12006-08-22 20:06:22 -04002000 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002001 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002
2003 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Chuck Lever4f390c12006-08-22 20:06:22 -04002004 if (!status) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 update_changeattr(dir, &res.dir_cinfo);
Chuck Lever4f390c12006-08-22 20:06:22 -04002006 nfs_post_op_update_inode(dir, res.dir_fattr);
2007 status = nfs_instantiate(dentry, &fhandle, &fattr);
2008 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009 return status;
2010}
2011
Chuck Lever4f390c12006-08-22 20:06:22 -04002012static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04002013 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014{
2015 struct nfs4_exception exception = { };
2016 int err;
2017 do {
2018 err = nfs4_handle_exception(NFS_SERVER(dir),
Chuck Lever94a6d752006-08-22 20:06:23 -04002019 _nfs4_proc_symlink(dir, dentry, page,
2020 len, sattr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021 &exception);
2022 } while (exception.retry);
2023 return err;
2024}
2025
2026static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2027 struct iattr *sattr)
2028{
2029 struct nfs_server *server = NFS_SERVER(dir);
2030 struct nfs_fh fhandle;
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002031 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 struct nfs4_create_arg arg = {
2033 .dir_fh = NFS_FH(dir),
2034 .server = server,
2035 .name = &dentry->d_name,
2036 .attrs = sattr,
2037 .ftype = NF4DIR,
2038 .bitmask = server->attr_bitmask,
2039 };
2040 struct nfs4_create_res res = {
2041 .server = server,
2042 .fh = &fhandle,
2043 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002044 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 };
2046 struct rpc_message msg = {
2047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2048 .rpc_argp = &arg,
2049 .rpc_resp = &res,
2050 };
2051 int status;
2052
Trond Myklebust0e574af2005-10-27 22:12:38 -04002053 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002054 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055
2056 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2057 if (!status) {
2058 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002059 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 status = nfs_instantiate(dentry, &fhandle, &fattr);
2061 }
2062 return status;
2063}
2064
2065static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2066 struct iattr *sattr)
2067{
2068 struct nfs4_exception exception = { };
2069 int err;
2070 do {
2071 err = nfs4_handle_exception(NFS_SERVER(dir),
2072 _nfs4_proc_mkdir(dir, dentry, sattr),
2073 &exception);
2074 } while (exception.retry);
2075 return err;
2076}
2077
2078static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2079 u64 cookie, struct page *page, unsigned int count, int plus)
2080{
2081 struct inode *dir = dentry->d_inode;
2082 struct nfs4_readdir_arg args = {
2083 .fh = NFS_FH(dir),
2084 .pages = &page,
2085 .pgbase = 0,
2086 .count = count,
2087 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2088 };
2089 struct nfs4_readdir_res res;
2090 struct rpc_message msg = {
2091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2092 .rpc_argp = &args,
2093 .rpc_resp = &res,
2094 .rpc_cred = cred,
2095 };
2096 int status;
2097
Trond Myklebusteadf4592005-06-22 17:16:39 +00002098 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2099 dentry->d_parent->d_name.name,
2100 dentry->d_name.name,
2101 (unsigned long long)cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2103 res.pgbase = args.pgbase;
2104 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2105 if (status == 0)
2106 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebusteadf4592005-06-22 17:16:39 +00002107 dprintk("%s: returns %d\n", __FUNCTION__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108 return status;
2109}
2110
2111static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2112 u64 cookie, struct page *page, unsigned int count, int plus)
2113{
2114 struct nfs4_exception exception = { };
2115 int err;
2116 do {
2117 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2118 _nfs4_proc_readdir(dentry, cred, cookie,
2119 page, count, plus),
2120 &exception);
2121 } while (exception.retry);
2122 return err;
2123}
2124
2125static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2126 struct iattr *sattr, dev_t rdev)
2127{
2128 struct nfs_server *server = NFS_SERVER(dir);
2129 struct nfs_fh fh;
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002130 struct nfs_fattr fattr, dir_fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 struct nfs4_create_arg arg = {
2132 .dir_fh = NFS_FH(dir),
2133 .server = server,
2134 .name = &dentry->d_name,
2135 .attrs = sattr,
2136 .bitmask = server->attr_bitmask,
2137 };
2138 struct nfs4_create_res res = {
2139 .server = server,
2140 .fh = &fh,
2141 .fattr = &fattr,
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002142 .dir_fattr = &dir_fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 };
2144 struct rpc_message msg = {
2145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2146 .rpc_argp = &arg,
2147 .rpc_resp = &res,
2148 };
2149 int status;
2150 int mode = sattr->ia_mode;
2151
Trond Myklebust0e574af2005-10-27 22:12:38 -04002152 nfs_fattr_init(&fattr);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002153 nfs_fattr_init(&dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
2155 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2156 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2157 if (S_ISFIFO(mode))
2158 arg.ftype = NF4FIFO;
2159 else if (S_ISBLK(mode)) {
2160 arg.ftype = NF4BLK;
2161 arg.u.device.specdata1 = MAJOR(rdev);
2162 arg.u.device.specdata2 = MINOR(rdev);
2163 }
2164 else if (S_ISCHR(mode)) {
2165 arg.ftype = NF4CHR;
2166 arg.u.device.specdata1 = MAJOR(rdev);
2167 arg.u.device.specdata2 = MINOR(rdev);
2168 }
2169 else
2170 arg.ftype = NF4SOCK;
2171
2172 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2173 if (status == 0) {
2174 update_changeattr(dir, &res.dir_cinfo);
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002175 nfs_post_op_update_inode(dir, res.dir_fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 status = nfs_instantiate(dentry, &fh, &fattr);
2177 }
2178 return status;
2179}
2180
2181static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2182 struct iattr *sattr, dev_t rdev)
2183{
2184 struct nfs4_exception exception = { };
2185 int err;
2186 do {
2187 err = nfs4_handle_exception(NFS_SERVER(dir),
2188 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2189 &exception);
2190 } while (exception.retry);
2191 return err;
2192}
2193
2194static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2195 struct nfs_fsstat *fsstat)
2196{
2197 struct nfs4_statfs_arg args = {
2198 .fh = fhandle,
2199 .bitmask = server->attr_bitmask,
2200 };
2201 struct rpc_message msg = {
2202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2203 .rpc_argp = &args,
2204 .rpc_resp = fsstat,
2205 };
2206
Trond Myklebust0e574af2005-10-27 22:12:38 -04002207 nfs_fattr_init(fsstat->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 return rpc_call_sync(server->client, &msg, 0);
2209}
2210
2211static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2212{
2213 struct nfs4_exception exception = { };
2214 int err;
2215 do {
2216 err = nfs4_handle_exception(server,
2217 _nfs4_proc_statfs(server, fhandle, fsstat),
2218 &exception);
2219 } while (exception.retry);
2220 return err;
2221}
2222
2223static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2224 struct nfs_fsinfo *fsinfo)
2225{
2226 struct nfs4_fsinfo_arg args = {
2227 .fh = fhandle,
2228 .bitmask = server->attr_bitmask,
2229 };
2230 struct rpc_message msg = {
2231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2232 .rpc_argp = &args,
2233 .rpc_resp = fsinfo,
2234 };
2235
2236 return rpc_call_sync(server->client, &msg, 0);
2237}
2238
2239static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2240{
2241 struct nfs4_exception exception = { };
2242 int err;
2243
2244 do {
2245 err = nfs4_handle_exception(server,
2246 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2247 &exception);
2248 } while (exception.retry);
2249 return err;
2250}
2251
2252static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2253{
Trond Myklebust0e574af2005-10-27 22:12:38 -04002254 nfs_fattr_init(fsinfo->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2256}
2257
2258static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2259 struct nfs_pathconf *pathconf)
2260{
2261 struct nfs4_pathconf_arg args = {
2262 .fh = fhandle,
2263 .bitmask = server->attr_bitmask,
2264 };
2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2267 .rpc_argp = &args,
2268 .rpc_resp = pathconf,
2269 };
2270
2271 /* None of the pathconf attributes are mandatory to implement */
2272 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2273 memset(pathconf, 0, sizeof(*pathconf));
2274 return 0;
2275 }
2276
Trond Myklebust0e574af2005-10-27 22:12:38 -04002277 nfs_fattr_init(pathconf->fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278 return rpc_call_sync(server->client, &msg, 0);
2279}
2280
2281static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2282 struct nfs_pathconf *pathconf)
2283{
2284 struct nfs4_exception exception = { };
2285 int err;
2286
2287 do {
2288 err = nfs4_handle_exception(server,
2289 _nfs4_proc_pathconf(server, fhandle, pathconf),
2290 &exception);
2291 } while (exception.retry);
2292 return err;
2293}
2294
Trond Myklebustec06c092006-03-20 13:44:27 -05002295static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296{
Trond Myklebustec06c092006-03-20 13:44:27 -05002297 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298
Trond Myklebustec06c092006-03-20 13:44:27 -05002299 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 rpc_restart_call(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05002301 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302 }
2303 if (task->tk_status > 0)
Trond Myklebustec06c092006-03-20 13:44:27 -05002304 renew_lease(server, data->timestamp);
2305 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306}
2307
Trond Myklebustec06c092006-03-20 13:44:27 -05002308static void nfs4_proc_read_setup(struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310 struct rpc_message msg = {
2311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2312 .rpc_argp = &data->args,
2313 .rpc_resp = &data->res,
2314 .rpc_cred = data->cred,
2315 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316
2317 data->timestamp = jiffies;
2318
Trond Myklebustec06c092006-03-20 13:44:27 -05002319 rpc_call_setup(&data->task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320}
2321
Trond Myklebust788e7a82006-03-20 13:44:27 -05002322static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 struct inode *inode = data->inode;
2325
2326 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2327 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002328 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002330 if (task->tk_status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 renew_lease(NFS_SERVER(inode), data->timestamp);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002332 nfs_post_op_update_inode(inode, data->res.fattr);
2333 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05002334 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335}
2336
Trond Myklebust788e7a82006-03-20 13:44:27 -05002337static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339 struct rpc_message msg = {
2340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2341 .rpc_argp = &data->args,
2342 .rpc_resp = &data->res,
2343 .rpc_cred = data->cred,
2344 };
2345 struct inode *inode = data->inode;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002346 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 int stable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002348
2349 if (how & FLUSH_STABLE) {
2350 if (!NFS_I(inode)->ncommit)
2351 stable = NFS_FILE_SYNC;
2352 else
2353 stable = NFS_DATA_SYNC;
2354 } else
2355 stable = NFS_UNSTABLE;
2356 data->args.stable = stable;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002357 data->args.bitmask = server->attr_bitmask;
2358 data->res.server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359
2360 data->timestamp = jiffies;
2361
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362 /* Finalize the task. */
Trond Myklebust788e7a82006-03-20 13:44:27 -05002363 rpc_call_setup(&data->task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364}
2365
Trond Myklebust788e7a82006-03-20 13:44:27 -05002366static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368 struct inode *inode = data->inode;
2369
2370 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2371 rpc_restart_call(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002372 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002374 if (task->tk_status >= 0)
2375 nfs_post_op_update_inode(inode, data->res.fattr);
Trond Myklebust788e7a82006-03-20 13:44:27 -05002376 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377}
2378
Trond Myklebust788e7a82006-03-20 13:44:27 -05002379static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381 struct rpc_message msg = {
2382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2383 .rpc_argp = &data->args,
2384 .rpc_resp = &data->res,
2385 .rpc_cred = data->cred,
2386 };
Trond Myklebust788e7a82006-03-20 13:44:27 -05002387 struct nfs_server *server = NFS_SERVER(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388
Trond Myklebust4f9838c2005-10-27 22:12:44 -04002389 data->args.bitmask = server->attr_bitmask;
2390 data->res.server = server;
2391
Trond Myklebust788e7a82006-03-20 13:44:27 -05002392 rpc_call_setup(&data->task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393}
2394
2395/*
2396 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2397 * standalone procedure for queueing an asynchronous RENEW.
2398 */
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002399static void nfs4_renew_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400{
David Howellsadfa6f92006-08-22 20:06:08 -04002401 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002402 unsigned long timestamp = (unsigned long)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403
2404 if (task->tk_status < 0) {
2405 switch (task->tk_status) {
2406 case -NFS4ERR_STALE_CLIENTID:
2407 case -NFS4ERR_EXPIRED:
2408 case -NFS4ERR_CB_PATH_DOWN:
2409 nfs4_schedule_state_recovery(clp);
2410 }
2411 return;
2412 }
2413 spin_lock(&clp->cl_lock);
2414 if (time_before(clp->cl_last_renewal,timestamp))
2415 clp->cl_last_renewal = timestamp;
2416 spin_unlock(&clp->cl_lock);
2417}
2418
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002419static const struct rpc_call_ops nfs4_renew_ops = {
2420 .rpc_call_done = nfs4_renew_done,
2421};
2422
David Howellsadfa6f92006-08-22 20:06:08 -04002423int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424{
2425 struct rpc_message msg = {
2426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2427 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002428 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 };
2430
2431 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002432 &nfs4_renew_ops, (void *)jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433}
2434
David Howellsadfa6f92006-08-22 20:06:08 -04002435int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436{
2437 struct rpc_message msg = {
2438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2439 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002440 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 };
2442 unsigned long now = jiffies;
2443 int status;
2444
2445 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2446 if (status < 0)
2447 return status;
2448 spin_lock(&clp->cl_lock);
2449 if (time_before(clp->cl_last_renewal,now))
2450 clp->cl_last_renewal = now;
2451 spin_unlock(&clp->cl_lock);
2452 return 0;
2453}
2454
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002455static inline int nfs4_server_supports_acls(struct nfs_server *server)
2456{
2457 return (server->caps & NFS_CAP_ACLS)
2458 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2459 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2460}
2461
2462/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2463 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2464 * the stack.
2465 */
2466#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2467
2468static void buf_to_pages(const void *buf, size_t buflen,
2469 struct page **pages, unsigned int *pgbase)
2470{
2471 const void *p = buf;
2472
2473 *pgbase = offset_in_page(buf);
2474 p -= *pgbase;
2475 while (p < buf + buflen) {
2476 *(pages++) = virt_to_page(p);
2477 p += PAGE_CACHE_SIZE;
2478 }
2479}
2480
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002481struct nfs4_cached_acl {
2482 int cached;
2483 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00002484 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002485};
2486
2487static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002488{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002489 struct nfs_inode *nfsi = NFS_I(inode);
2490
2491 spin_lock(&inode->i_lock);
2492 kfree(nfsi->nfs4_acl);
2493 nfsi->nfs4_acl = acl;
2494 spin_unlock(&inode->i_lock);
2495}
2496
2497static void nfs4_zap_acl_attr(struct inode *inode)
2498{
2499 nfs4_set_cached_acl(inode, NULL);
2500}
2501
2502static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2503{
2504 struct nfs_inode *nfsi = NFS_I(inode);
2505 struct nfs4_cached_acl *acl;
2506 int ret = -ENOENT;
2507
2508 spin_lock(&inode->i_lock);
2509 acl = nfsi->nfs4_acl;
2510 if (acl == NULL)
2511 goto out;
2512 if (buf == NULL) /* user is just asking for length */
2513 goto out_len;
2514 if (acl->cached == 0)
2515 goto out;
2516 ret = -ERANGE; /* see getxattr(2) man page */
2517 if (acl->len > buflen)
2518 goto out;
2519 memcpy(buf, acl->data, acl->len);
2520out_len:
2521 ret = acl->len;
2522out:
2523 spin_unlock(&inode->i_lock);
2524 return ret;
2525}
2526
2527static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2528{
2529 struct nfs4_cached_acl *acl;
2530
2531 if (buf && acl_len <= PAGE_SIZE) {
2532 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2533 if (acl == NULL)
2534 goto out;
2535 acl->cached = 1;
2536 memcpy(acl->data, buf, acl_len);
2537 } else {
2538 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2539 if (acl == NULL)
2540 goto out;
2541 acl->cached = 0;
2542 }
2543 acl->len = acl_len;
2544out:
2545 nfs4_set_cached_acl(inode, acl);
2546}
2547
Trond Myklebust16b42892006-08-24 12:27:15 -04002548static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002549{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002550 struct page *pages[NFS4ACL_MAXPAGES];
2551 struct nfs_getaclargs args = {
2552 .fh = NFS_FH(inode),
2553 .acl_pages = pages,
2554 .acl_len = buflen,
2555 };
2556 size_t resp_len = buflen;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002557 void *resp_buf;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002558 struct rpc_message msg = {
2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2560 .rpc_argp = &args,
2561 .rpc_resp = &resp_len,
2562 };
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002563 struct page *localpage = NULL;
2564 int ret;
2565
2566 if (buflen < PAGE_SIZE) {
2567 /* As long as we're doing a round trip to the server anyway,
2568 * let's be prepared for a page of acl data. */
2569 localpage = alloc_page(GFP_KERNEL);
2570 resp_buf = page_address(localpage);
2571 if (localpage == NULL)
2572 return -ENOMEM;
2573 args.acl_pages[0] = localpage;
2574 args.acl_pgbase = 0;
J. Bruce Fields1d95db82005-10-13 16:54:32 -04002575 resp_len = args.acl_len = PAGE_SIZE;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002576 } else {
2577 resp_buf = buf;
2578 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2579 }
2580 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2581 if (ret)
2582 goto out_free;
2583 if (resp_len > args.acl_len)
2584 nfs4_write_cached_acl(inode, NULL, resp_len);
2585 else
2586 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2587 if (buf) {
2588 ret = -ERANGE;
2589 if (resp_len > buflen)
2590 goto out_free;
2591 if (localpage)
2592 memcpy(buf, resp_buf, resp_len);
2593 }
2594 ret = resp_len;
2595out_free:
2596 if (localpage)
2597 __free_page(localpage);
2598 return ret;
2599}
2600
Trond Myklebust16b42892006-08-24 12:27:15 -04002601static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2602{
2603 struct nfs4_exception exception = { };
2604 ssize_t ret;
2605 do {
2606 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2607 if (ret >= 0)
2608 break;
2609 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2610 } while (exception.retry);
2611 return ret;
2612}
2613
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002614static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2615{
2616 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002617 int ret;
2618
2619 if (!nfs4_server_supports_acls(server))
2620 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002621 ret = nfs_revalidate_inode(server, inode);
2622 if (ret < 0)
2623 return ret;
2624 ret = nfs4_read_cached_acl(inode, buf, buflen);
2625 if (ret != -ENOENT)
2626 return ret;
2627 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00002628}
2629
Trond Myklebust16b42892006-08-24 12:27:15 -04002630static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002631{
2632 struct nfs_server *server = NFS_SERVER(inode);
2633 struct page *pages[NFS4ACL_MAXPAGES];
2634 struct nfs_setaclargs arg = {
2635 .fh = NFS_FH(inode),
2636 .acl_pages = pages,
2637 .acl_len = buflen,
2638 };
2639 struct rpc_message msg = {
2640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2641 .rpc_argp = &arg,
2642 .rpc_resp = NULL,
2643 };
2644 int ret;
2645
2646 if (!nfs4_server_supports_acls(server))
2647 return -EOPNOTSUPP;
Trond Myklebust642ac542005-10-18 14:20:19 -07002648 nfs_inode_return_delegation(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002649 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
David Howells1f163412006-08-22 20:06:11 -04002650 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002651 if (ret == 0)
2652 nfs4_write_cached_acl(inode, buf, buflen);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00002653 return ret;
2654}
2655
Trond Myklebust16b42892006-08-24 12:27:15 -04002656static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2657{
2658 struct nfs4_exception exception = { };
2659 int err;
2660 do {
2661 err = nfs4_handle_exception(NFS_SERVER(inode),
2662 __nfs4_proc_set_acl(inode, buf, buflen),
2663 &exception);
2664 } while (exception.retry);
2665 return err;
2666}
2667
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668static int
Trond Myklebustfaf5f492005-10-18 14:20:15 -07002669nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670{
David Howells7539bba2006-08-22 20:06:09 -04002671 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002672
2673 if (!clp || task->tk_status >= 0)
2674 return 0;
2675 switch(task->tk_status) {
2676 case -NFS4ERR_STALE_CLIENTID:
2677 case -NFS4ERR_STALE_STATEID:
2678 case -NFS4ERR_EXPIRED:
2679 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2680 nfs4_schedule_state_recovery(clp);
Trond Myklebust433fbe42006-01-03 09:55:22 +01002681 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682 rpc_wake_up_task(task);
2683 task->tk_status = 0;
2684 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002685 case -NFS4ERR_DELAY:
Chuck Lever006ea732006-03-20 13:44:14 -05002686 nfs_inc_server_stats((struct nfs_server *) server,
2687 NFSIOS_DELAY);
2688 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2690 task->tk_status = 0;
2691 return -EAGAIN;
2692 case -NFS4ERR_OLD_STATEID:
2693 task->tk_status = 0;
2694 return -EAGAIN;
2695 }
2696 task->tk_status = nfs4_map_errors(task->tk_status);
2697 return 0;
2698}
2699
Trond Myklebust433fbe42006-01-03 09:55:22 +01002700static int nfs4_wait_bit_interruptible(void *word)
2701{
2702 if (signal_pending(current))
2703 return -ERESTARTSYS;
2704 schedule();
2705 return 0;
2706}
2707
David Howellsadfa6f92006-08-22 20:06:08 -04002708static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002710 sigset_t oldset;
Trond Myklebust433fbe42006-01-03 09:55:22 +01002711 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712
2713 might_sleep();
2714
2715 rpc_clnt_sigmask(clnt, &oldset);
Trond Myklebust433fbe42006-01-03 09:55:22 +01002716 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2717 nfs4_wait_bit_interruptible,
2718 TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719 rpc_clnt_sigunmask(clnt, &oldset);
2720 return res;
2721}
2722
2723static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2724{
2725 sigset_t oldset;
2726 int res = 0;
2727
2728 might_sleep();
2729
2730 if (*timeout <= 0)
2731 *timeout = NFS4_POLL_RETRY_MIN;
2732 if (*timeout > NFS4_POLL_RETRY_MAX)
2733 *timeout = NFS4_POLL_RETRY_MAX;
2734 rpc_clnt_sigmask(clnt, &oldset);
2735 if (clnt->cl_intr) {
Nishanth Aravamudan041e0e32005-09-10 00:27:23 -07002736 schedule_timeout_interruptible(*timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737 if (signalled())
2738 res = -ERESTARTSYS;
Nishanth Aravamudan041e0e32005-09-10 00:27:23 -07002739 } else
2740 schedule_timeout_uninterruptible(*timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741 rpc_clnt_sigunmask(clnt, &oldset);
2742 *timeout <<= 1;
2743 return res;
2744}
2745
2746/* This is the error handling routine for processes that are allowed
2747 * to sleep.
2748 */
Trond Myklebustfaf5f492005-10-18 14:20:15 -07002749int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750{
David Howells7539bba2006-08-22 20:06:09 -04002751 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752 int ret = errorcode;
2753
2754 exception->retry = 0;
2755 switch(errorcode) {
2756 case 0:
2757 return 0;
2758 case -NFS4ERR_STALE_CLIENTID:
2759 case -NFS4ERR_STALE_STATEID:
2760 case -NFS4ERR_EXPIRED:
Trond Myklebust433fbe42006-01-03 09:55:22 +01002761 nfs4_schedule_state_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 ret = nfs4_wait_clnt_recover(server->client, clp);
2763 if (ret == 0)
2764 exception->retry = 1;
2765 break;
Trond Myklebustc5149832006-09-15 08:25:04 -04002766 case -NFS4ERR_FILE_OPEN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 case -NFS4ERR_GRACE:
2768 case -NFS4ERR_DELAY:
2769 ret = nfs4_delay(server->client, &exception->timeout);
Trond Myklebust2c566172005-11-04 15:33:50 -05002770 if (ret != 0)
2771 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772 case -NFS4ERR_OLD_STATEID:
Trond Myklebust2c566172005-11-04 15:33:50 -05002773 exception->retry = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 }
2775 /* We failed to handle the error */
2776 return nfs4_map_errors(ret);
2777}
2778
David Howellsadfa6f92006-08-22 20:06:08 -04002779int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780{
2781 nfs4_verifier sc_verifier;
2782 struct nfs4_setclientid setclientid = {
2783 .sc_verifier = &sc_verifier,
2784 .sc_prog = program,
2785 };
2786 struct rpc_message msg = {
2787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2788 .rpc_argp = &setclientid,
2789 .rpc_resp = clp,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002790 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791 };
Al Virobc4785c2006-10-19 23:28:51 -07002792 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002793 int loop = 0;
2794 int status;
2795
Al Virobc4785c2006-10-19 23:28:51 -07002796 p = (__be32*)sc_verifier.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002797 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2798 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2799
2800 for(;;) {
2801 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2802 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
David Howells24c8dbb2006-08-22 20:06:10 -04002803 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
Trond Myklebust286d7d62006-01-03 09:55:26 +01002804 cred->cr_ops->cr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002805 clp->cl_id_uniquifier);
2806 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2807 sizeof(setclientid.sc_netid), "tcp");
2808 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2809 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2810 clp->cl_ipaddr, port >> 8, port & 255);
2811
2812 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2813 if (status != -NFS4ERR_CLID_INUSE)
2814 break;
2815 if (signalled())
2816 break;
2817 if (loop++ & 1)
2818 ssleep(clp->cl_lease_time + 1);
2819 else
2820 if (++clp->cl_id_uniquifier == 0)
2821 break;
2822 }
2823 return status;
2824}
2825
David Howellsadfa6f92006-08-22 20:06:08 -04002826static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827{
2828 struct nfs_fsinfo fsinfo;
2829 struct rpc_message msg = {
2830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2831 .rpc_argp = clp,
2832 .rpc_resp = &fsinfo,
Trond Myklebust286d7d62006-01-03 09:55:26 +01002833 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 };
2835 unsigned long now;
2836 int status;
2837
2838 now = jiffies;
2839 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2840 if (status == 0) {
2841 spin_lock(&clp->cl_lock);
2842 clp->cl_lease_time = fsinfo.lease_time * HZ;
2843 clp->cl_last_renewal = now;
Trond Myklebust58d97142006-01-03 09:55:24 +01002844 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845 spin_unlock(&clp->cl_lock);
2846 }
2847 return status;
2848}
2849
David Howellsadfa6f92006-08-22 20:06:08 -04002850int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
Trond Myklebust51581f32006-03-20 13:44:47 -05002851{
2852 long timeout;
2853 int err;
2854 do {
2855 err = _nfs4_proc_setclientid_confirm(clp, cred);
2856 switch (err) {
2857 case 0:
2858 return err;
2859 case -NFS4ERR_RESOURCE:
2860 /* The IBM lawyers misread another document! */
2861 case -NFS4ERR_DELAY:
2862 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2863 }
2864 } while (err == 0);
2865 return err;
2866}
2867
Trond Myklebustfe650402006-01-03 09:55:18 +01002868struct nfs4_delegreturndata {
2869 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002870 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01002871 struct nfs_fh fh;
2872 nfs4_stateid stateid;
2873 struct rpc_cred *cred;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002874 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002875 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01002876 int rpc_status;
2877};
2878
2879static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002880{
Trond Myklebustfe650402006-01-03 09:55:18 +01002881 struct nfs4_delegreturndata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 struct rpc_message msg = {
2883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
Trond Myklebustfe650402006-01-03 09:55:18 +01002884 .rpc_argp = &data->args,
Trond Myklebustfa178f22006-01-03 09:55:38 +01002885 .rpc_resp = &data->res,
Trond Myklebustfe650402006-01-03 09:55:18 +01002886 .rpc_cred = data->cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002887 };
Trond Myklebustfa178f22006-01-03 09:55:38 +01002888 nfs_fattr_init(data->res.fattr);
Trond Myklebustfe650402006-01-03 09:55:18 +01002889 rpc_call_setup(task, &msg, 0);
2890}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002891
Trond Myklebustfe650402006-01-03 09:55:18 +01002892static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2893{
2894 struct nfs4_delegreturndata *data = calldata;
2895 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002896 if (data->rpc_status == 0)
Trond Myklebustfa178f22006-01-03 09:55:38 +01002897 renew_lease(data->res.server, data->timestamp);
Trond Myklebustfe650402006-01-03 09:55:18 +01002898}
2899
2900static void nfs4_delegreturn_release(void *calldata)
2901{
2902 struct nfs4_delegreturndata *data = calldata;
2903
2904 put_rpccred(data->cred);
2905 kfree(calldata);
2906}
2907
Jesper Juhlc8d149f2006-03-20 13:44:07 -05002908static const struct rpc_call_ops nfs4_delegreturn_ops = {
Trond Myklebustfe650402006-01-03 09:55:18 +01002909 .rpc_call_prepare = nfs4_delegreturn_prepare,
2910 .rpc_call_done = nfs4_delegreturn_done,
2911 .rpc_release = nfs4_delegreturn_release,
2912};
2913
2914static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2915{
2916 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002917 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01002918 struct rpc_task *task;
2919 int status;
2920
2921 data = kmalloc(sizeof(*data), GFP_KERNEL);
2922 if (data == NULL)
2923 return -ENOMEM;
2924 data->args.fhandle = &data->fh;
2925 data->args.stateid = &data->stateid;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002926 data->args.bitmask = server->attr_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01002927 nfs_copy_fh(&data->fh, NFS_FH(inode));
2928 memcpy(&data->stateid, stateid, sizeof(data->stateid));
Trond Myklebustfa178f22006-01-03 09:55:38 +01002929 data->res.fattr = &data->fattr;
2930 data->res.server = server;
Trond Myklebustfe650402006-01-03 09:55:18 +01002931 data->cred = get_rpccred(cred);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002932 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01002933 data->rpc_status = 0;
2934
2935 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05002936 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01002937 return PTR_ERR(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01002938 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebustfa178f22006-01-03 09:55:38 +01002939 if (status == 0) {
Trond Myklebustfe650402006-01-03 09:55:18 +01002940 status = data->rpc_status;
Trond Myklebustfa178f22006-01-03 09:55:38 +01002941 if (status == 0)
2942 nfs_post_op_update_inode(inode, &data->fattr);
2943 }
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05002944 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01002945 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946}
2947
2948int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2949{
2950 struct nfs_server *server = NFS_SERVER(inode);
2951 struct nfs4_exception exception = { };
2952 int err;
2953 do {
2954 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2955 switch (err) {
2956 case -NFS4ERR_STALE_STATEID:
2957 case -NFS4ERR_EXPIRED:
David Howells7539bba2006-08-22 20:06:09 -04002958 nfs4_schedule_state_recovery(server->nfs_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 case 0:
2960 return 0;
2961 }
2962 err = nfs4_handle_exception(server, err, &exception);
2963 } while (exception.retry);
2964 return err;
2965}
2966
2967#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2968#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2969
2970/*
2971 * sleep, with exponential backoff, and retry the LOCK operation.
2972 */
2973static unsigned long
2974nfs4_set_lock_task_retry(unsigned long timeout)
2975{
Nishanth Aravamudan041e0e32005-09-10 00:27:23 -07002976 schedule_timeout_interruptible(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977 timeout <<= 1;
2978 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2979 return NFS4_LOCK_MAXTIMEOUT;
2980 return timeout;
2981}
2982
Linus Torvalds1da177e2005-04-16 15:20:36 -07002983static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2984{
2985 struct inode *inode = state->inode;
2986 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04002987 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01002988 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002989 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01002990 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01002992 struct nfs_lockt_res res = {
2993 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002994 };
2995 struct rpc_message msg = {
2996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2997 .rpc_argp = &arg,
2998 .rpc_resp = &res,
2999 .rpc_cred = state->owner->so_cred,
3000 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001 struct nfs4_lock_state *lsp;
3002 int status;
3003
3004 down_read(&clp->cl_sem);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003005 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003006 status = nfs4_set_lock_state(state, request);
3007 if (status != 0)
3008 goto out;
3009 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003010 arg.lock_owner.id = lsp->ls_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003011 status = rpc_call_sync(server->client, &msg, 0);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003012 switch (status) {
3013 case 0:
3014 request->fl_type = F_UNLCK;
3015 break;
3016 case -NFS4ERR_DENIED:
3017 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003018 }
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00003019out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003020 up_read(&clp->cl_sem);
3021 return status;
3022}
3023
3024static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3025{
3026 struct nfs4_exception exception = { };
3027 int err;
3028
3029 do {
3030 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3031 _nfs4_proc_getlk(state, cmd, request),
3032 &exception);
3033 } while (exception.retry);
3034 return err;
3035}
3036
3037static int do_vfs_lock(struct file *file, struct file_lock *fl)
3038{
3039 int res = 0;
3040 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3041 case FL_POSIX:
3042 res = posix_lock_file_wait(file, fl);
3043 break;
3044 case FL_FLOCK:
3045 res = flock_lock_file_wait(file, fl);
3046 break;
3047 default:
3048 BUG();
3049 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003050 return res;
3051}
3052
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003053struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003054 struct nfs_locku_args arg;
3055 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003056 struct nfs4_lock_state *lsp;
3057 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003058 struct file_lock fl;
3059 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003060 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003061};
3062
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003063static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3064 struct nfs_open_context *ctx,
3065 struct nfs4_lock_state *lsp,
3066 struct nfs_seqid *seqid)
3067{
3068 struct nfs4_unlockdata *p;
3069 struct inode *inode = lsp->ls_state->inode;
3070
3071 p = kmalloc(sizeof(*p), GFP_KERNEL);
3072 if (p == NULL)
3073 return NULL;
3074 p->arg.fh = NFS_FH(inode);
3075 p->arg.fl = &p->fl;
3076 p->arg.seqid = seqid;
3077 p->arg.stateid = &lsp->ls_stateid;
3078 p->lsp = lsp;
3079 atomic_inc(&lsp->ls_count);
3080 /* Ensure we don't close file until we're done freeing locks! */
3081 p->ctx = get_nfs_open_context(ctx);
3082 memcpy(&p->fl, fl, sizeof(p->fl));
3083 p->server = NFS_SERVER(inode);
3084 return p;
3085}
3086
Trond Myklebust06f814a2006-01-03 09:55:07 +01003087static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003088{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003089 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003090 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01003091 nfs4_put_lock_state(calldata->lsp);
3092 put_nfs_open_context(calldata->ctx);
3093 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003094}
3095
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003096static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003097{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003098 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003099
Trond Myklebust06f814a2006-01-03 09:55:07 +01003100 if (RPC_ASSASSINATED(task))
3101 return;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003102 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003103 switch (task->tk_status) {
3104 case 0:
3105 memcpy(calldata->lsp->ls_stateid.data,
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003106 calldata->res.stateid.data,
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003107 sizeof(calldata->lsp->ls_stateid.data));
Trond Myklebust26e976a2006-01-03 09:55:21 +01003108 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003109 break;
3110 case -NFS4ERR_STALE_STATEID:
3111 case -NFS4ERR_EXPIRED:
David Howells7539bba2006-08-22 20:06:09 -04003112 nfs4_schedule_state_recovery(calldata->server->nfs_client);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003113 break;
3114 default:
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003115 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003116 rpc_restart_call(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003117 }
3118 }
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003119}
3120
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003121static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003122{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003123 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003124 struct rpc_message msg = {
3125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003126 .rpc_argp = &calldata->arg,
3127 .rpc_resp = &calldata->res,
3128 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003131 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003132 return;
3133 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003134 /* Note: exit _without_ running nfs4_locku_done */
3135 task->tk_action = NULL;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003136 return;
3137 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003138 calldata->timestamp = jiffies;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003139 rpc_call_setup(task, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003140}
3141
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003142static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01003143 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003144 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01003145 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01003146};
3147
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003148static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3149 struct nfs_open_context *ctx,
3150 struct nfs4_lock_state *lsp,
3151 struct nfs_seqid *seqid)
3152{
3153 struct nfs4_unlockdata *data;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003154
3155 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3156 if (data == NULL) {
3157 nfs_free_seqid(seqid);
3158 return ERR_PTR(-ENOMEM);
3159 }
3160
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003161 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003162}
3163
Linus Torvalds1da177e2005-04-16 15:20:36 -07003164static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3165{
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003166 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003167 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01003168 struct rpc_task *task;
3169 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003170
Trond Myklebust9b073572006-06-29 16:38:34 -04003171 status = nfs4_set_lock_state(state, request);
3172 /* Unlock _before_ we do the RPC call */
3173 request->fl_flags |= FL_EXISTS;
3174 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3175 goto out;
3176 if (status != 0)
3177 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003178 /* Is this a delegated lock? */
3179 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
Trond Myklebust9b073572006-06-29 16:38:34 -04003180 goto out;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003181 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003182 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
Trond Myklebust9b073572006-06-29 16:38:34 -04003183 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003184 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04003185 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003186 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3187 status = PTR_ERR(task);
3188 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04003189 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003190 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003191 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04003192out:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07003193 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194}
3195
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003196struct nfs4_lockdata {
3197 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01003198 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003199 struct nfs4_lock_state *lsp;
3200 struct nfs_open_context *ctx;
3201 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003202 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003203 int rpc_status;
3204 int cancelled;
3205};
3206
3207static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3208 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3209{
3210 struct nfs4_lockdata *p;
3211 struct inode *inode = lsp->ls_state->inode;
3212 struct nfs_server *server = NFS_SERVER(inode);
3213
3214 p = kzalloc(sizeof(*p), GFP_KERNEL);
3215 if (p == NULL)
3216 return NULL;
3217
3218 p->arg.fh = NFS_FH(inode);
3219 p->arg.fl = &p->fl;
3220 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3221 if (p->arg.lock_seqid == NULL)
3222 goto out_free;
3223 p->arg.lock_stateid = &lsp->ls_stateid;
David Howells7539bba2006-08-22 20:06:09 -04003224 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003225 p->arg.lock_owner.id = lsp->ls_id;
3226 p->lsp = lsp;
3227 atomic_inc(&lsp->ls_count);
3228 p->ctx = get_nfs_open_context(ctx);
3229 memcpy(&p->fl, fl, sizeof(p->fl));
3230 return p;
3231out_free:
3232 kfree(p);
3233 return NULL;
3234}
3235
3236static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3237{
3238 struct nfs4_lockdata *data = calldata;
3239 struct nfs4_state *state = data->lsp->ls_state;
3240 struct nfs4_state_owner *sp = state->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241 struct rpc_message msg = {
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3243 .rpc_argp = &data->arg,
3244 .rpc_resp = &data->res,
3245 .rpc_cred = sp->so_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003246 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003248 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3249 return;
3250 dprintk("%s: begin!\n", __FUNCTION__);
3251 /* Do we need to do an open_to_lock_owner? */
3252 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3253 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3254 if (data->arg.open_seqid == NULL) {
3255 data->rpc_status = -ENOMEM;
3256 task->tk_action = NULL;
Trond Myklebust06735b32005-10-18 14:20:15 -07003257 goto out;
Trond Myklebust06735b32005-10-18 14:20:15 -07003258 }
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003259 data->arg.open_stateid = &state->stateid;
3260 data->arg.new_lock_owner = 1;
3261 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01003262 data->timestamp = jiffies;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003263 rpc_call_setup(task, &msg, 0);
Trond Myklebust06735b32005-10-18 14:20:15 -07003264out:
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003265 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3266}
3267
3268static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3269{
3270 struct nfs4_lockdata *data = calldata;
3271
3272 dprintk("%s: begin!\n", __FUNCTION__);
3273
3274 data->rpc_status = task->tk_status;
3275 if (RPC_ASSASSINATED(task))
3276 goto out;
3277 if (data->arg.new_lock_owner != 0) {
3278 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3279 if (data->rpc_status == 0)
3280 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3281 else
3282 goto out;
3283 }
3284 if (data->rpc_status == 0) {
3285 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3286 sizeof(data->lsp->ls_stateid.data));
3287 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
Trond Myklebust26e976a2006-01-03 09:55:21 +01003288 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003289 }
3290 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3291out:
3292 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3293}
3294
3295static void nfs4_lock_release(void *calldata)
3296{
3297 struct nfs4_lockdata *data = calldata;
3298
3299 dprintk("%s: begin!\n", __FUNCTION__);
3300 if (data->arg.open_seqid != NULL)
3301 nfs_free_seqid(data->arg.open_seqid);
3302 if (data->cancelled != 0) {
3303 struct rpc_task *task;
3304 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3305 data->arg.lock_seqid);
3306 if (!IS_ERR(task))
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003307 rpc_put_task(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003308 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3309 } else
3310 nfs_free_seqid(data->arg.lock_seqid);
3311 nfs4_put_lock_state(data->lsp);
3312 put_nfs_open_context(data->ctx);
3313 kfree(data);
3314 dprintk("%s: done!\n", __FUNCTION__);
3315}
3316
3317static const struct rpc_call_ops nfs4_lock_ops = {
3318 .rpc_call_prepare = nfs4_lock_prepare,
3319 .rpc_call_done = nfs4_lock_done,
3320 .rpc_release = nfs4_lock_release,
3321};
3322
3323static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3324{
3325 struct nfs4_lockdata *data;
3326 struct rpc_task *task;
3327 int ret;
3328
3329 dprintk("%s: begin!\n", __FUNCTION__);
3330 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3331 fl->fl_u.nfs4_fl.owner);
3332 if (data == NULL)
3333 return -ENOMEM;
3334 if (IS_SETLKW(cmd))
3335 data->arg.block = 1;
3336 if (reclaim != 0)
3337 data->arg.reclaim = 1;
3338 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3339 &nfs4_lock_ops, data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05003340 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003341 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003342 ret = nfs4_wait_for_completion_rpc_task(task);
3343 if (ret == 0) {
3344 ret = data->rpc_status;
3345 if (ret == -NFS4ERR_DENIED)
3346 ret = -EAGAIN;
3347 } else
3348 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05003349 rpc_put_task(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01003350 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3351 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003352}
3353
3354static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3355{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003356 struct nfs_server *server = NFS_SERVER(state->inode);
3357 struct nfs4_exception exception = { };
3358 int err;
3359
3360 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003361 /* Cache the lock if possible... */
3362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3363 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003364 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3365 if (err != -NFS4ERR_DELAY)
3366 break;
3367 nfs4_handle_exception(server, err, &exception);
3368 } while (exception.retry);
3369 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003370}
3371
3372static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3373{
Trond Myklebust202b50d2005-06-22 17:16:29 +00003374 struct nfs_server *server = NFS_SERVER(state->inode);
3375 struct nfs4_exception exception = { };
3376 int err;
3377
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003378 err = nfs4_set_lock_state(state, request);
3379 if (err != 0)
3380 return err;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003381 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04003382 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3383 return 0;
Trond Myklebust202b50d2005-06-22 17:16:29 +00003384 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3385 if (err != -NFS4ERR_DELAY)
3386 break;
3387 nfs4_handle_exception(server, err, &exception);
3388 } while (exception.retry);
3389 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003390}
3391
3392static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3393{
David Howellsadfa6f92006-08-22 20:06:08 -04003394 struct nfs_client *clp = state->owner->so_client;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003395 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396 int status;
3397
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003398 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003399 status = nfs4_set_lock_state(state, request);
3400 if (status != 0)
3401 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04003402 request->fl_flags |= FL_ACCESS;
3403 status = do_vfs_lock(request->fl_file, request);
3404 if (status < 0)
3405 goto out;
3406 down_read(&clp->cl_sem);
3407 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3408 struct nfs_inode *nfsi = NFS_I(state->inode);
3409 /* Yes: cache locks! */
3410 down_read(&nfsi->rwsem);
3411 /* ...but avoid races with delegation recall... */
3412 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3413 request->fl_flags = fl_flags & ~FL_SLEEP;
3414 status = do_vfs_lock(request->fl_file, request);
3415 up_read(&nfsi->rwsem);
3416 goto out_unlock;
3417 }
3418 up_read(&nfsi->rwsem);
3419 }
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003420 status = _nfs4_do_setlk(state, cmd, request, 0);
3421 if (status != 0)
Trond Myklebust01c3b862006-06-29 16:38:39 -04003422 goto out_unlock;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003423 /* Note: we always want to sleep here! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04003424 request->fl_flags = fl_flags | FL_SLEEP;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05003425 if (do_vfs_lock(request->fl_file, request) < 0)
3426 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003427out_unlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428 up_read(&clp->cl_sem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04003429out:
3430 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431 return status;
3432}
3433
3434static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3435{
3436 struct nfs4_exception exception = { };
3437 int err;
3438
3439 do {
3440 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3441 _nfs4_proc_setlk(state, cmd, request),
3442 &exception);
3443 } while (exception.retry);
3444 return err;
3445}
3446
3447static int
3448nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3449{
3450 struct nfs_open_context *ctx;
3451 struct nfs4_state *state;
3452 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3453 int status;
3454
3455 /* verify open state */
3456 ctx = (struct nfs_open_context *)filp->private_data;
3457 state = ctx->state;
3458
3459 if (request->fl_start < 0 || request->fl_end < 0)
3460 return -EINVAL;
3461
3462 if (IS_GETLK(cmd))
3463 return nfs4_proc_getlk(state, F_GETLK, request);
3464
3465 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3466 return -EINVAL;
3467
3468 if (request->fl_type == F_UNLCK)
3469 return nfs4_proc_unlck(state, cmd, request);
3470
3471 do {
3472 status = nfs4_proc_setlk(state, cmd, request);
3473 if ((status != -EAGAIN) || IS_SETLK(cmd))
3474 break;
3475 timeout = nfs4_set_lock_task_retry(timeout);
3476 status = -ERESTARTSYS;
3477 if (signalled())
3478 break;
3479 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003480 return status;
3481}
3482
Trond Myklebust888e6942005-11-04 15:38:11 -05003483int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3484{
3485 struct nfs_server *server = NFS_SERVER(state->inode);
3486 struct nfs4_exception exception = { };
3487 int err;
3488
3489 err = nfs4_set_lock_state(state, fl);
3490 if (err != 0)
3491 goto out;
3492 do {
3493 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3494 if (err != -NFS4ERR_DELAY)
3495 break;
3496 err = nfs4_handle_exception(server, err, &exception);
3497 } while (exception.retry);
3498out:
3499 return err;
3500}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003501
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003502#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3503
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003504int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3505 size_t buflen, int flags)
3506{
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00003507 struct inode *inode = dentry->d_inode;
3508
3509 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3510 return -EOPNOTSUPP;
3511
3512 if (!S_ISREG(inode->i_mode) &&
3513 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3514 return -EPERM;
3515
3516 return nfs4_proc_set_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003517}
3518
3519/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3520 * and that's what we'll do for e.g. user attributes that haven't been set.
3521 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3522 * attributes in kernel-managed attribute namespaces. */
3523ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3524 size_t buflen)
3525{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003526 struct inode *inode = dentry->d_inode;
3527
3528 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3529 return -EOPNOTSUPP;
3530
3531 return nfs4_proc_get_acl(inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003532}
3533
3534ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3535{
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003536 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003537
J. Bruce Fields096455a2006-03-20 23:23:42 -05003538 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3539 return 0;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003540 if (buf && buflen < len)
3541 return -ERANGE;
3542 if (buf)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00003543 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3544 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003545}
3546
Trond Myklebustc228fd32007-01-13 02:28:11 -05003547int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003548 struct nfs4_fs_locations *fs_locations, struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04003549{
3550 struct nfs_server *server = NFS_SERVER(dir);
3551 u32 bitmask[2] = {
Manoj Naik361e6242006-06-09 09:34:24 -04003552 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3553 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003554 };
3555 struct nfs4_fs_locations_arg args = {
3556 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05003557 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003558 .page = page,
3559 .bitmask = bitmask,
3560 };
3561 struct rpc_message msg = {
3562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3563 .rpc_argp = &args,
Manoj Naik7aaa0b32006-06-09 09:34:23 -04003564 .rpc_resp = fs_locations,
Trond Myklebust683b57b2006-06-09 09:34:22 -04003565 };
3566 int status;
3567
3568 dprintk("%s: start\n", __FUNCTION__);
Trond Myklebustc228fd32007-01-13 02:28:11 -05003569 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04003570 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04003571 fs_locations->nlocations = 0;
Trond Myklebust683b57b2006-06-09 09:34:22 -04003572 status = rpc_call_sync(server->client, &msg, 0);
3573 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3574 return status;
3575}
3576
Linus Torvalds1da177e2005-04-16 15:20:36 -07003577struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3578 .recover_open = nfs4_open_reclaim,
3579 .recover_lock = nfs4_lock_reclaim,
3580};
3581
3582struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3583 .recover_open = nfs4_open_expired,
3584 .recover_lock = nfs4_lock_expired,
3585};
3586
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003587static struct inode_operations nfs4_file_inode_operations = {
3588 .permission = nfs_permission,
3589 .getattr = nfs_getattr,
3590 .setattr = nfs_setattr,
3591 .getxattr = nfs4_getxattr,
3592 .setxattr = nfs4_setxattr,
3593 .listxattr = nfs4_listxattr,
3594};
3595
David Howells509de812006-08-22 20:06:11 -04003596const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003597 .version = 4, /* protocol version */
3598 .dentry_ops = &nfs4_dentry_operations,
3599 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00003600 .file_inode_ops = &nfs4_file_inode_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003601 .getroot = nfs4_proc_get_root,
3602 .getattr = nfs4_proc_getattr,
3603 .setattr = nfs4_proc_setattr,
David Howells2b3de442006-08-22 20:06:09 -04003604 .lookupfh = nfs4_proc_lookupfh,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003605 .lookup = nfs4_proc_lookup,
3606 .access = nfs4_proc_access,
3607 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608 .create = nfs4_proc_create,
3609 .remove = nfs4_proc_remove,
3610 .unlink_setup = nfs4_proc_unlink_setup,
3611 .unlink_done = nfs4_proc_unlink_done,
3612 .rename = nfs4_proc_rename,
3613 .link = nfs4_proc_link,
3614 .symlink = nfs4_proc_symlink,
3615 .mkdir = nfs4_proc_mkdir,
3616 .rmdir = nfs4_proc_remove,
3617 .readdir = nfs4_proc_readdir,
3618 .mknod = nfs4_proc_mknod,
3619 .statfs = nfs4_proc_statfs,
3620 .fsinfo = nfs4_proc_fsinfo,
3621 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04003622 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003623 .decode_dirent = nfs4_decode_dirent,
3624 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05003625 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003627 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003628 .commit_setup = nfs4_proc_commit_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05003629 .commit_done = nfs4_commit_done,
Trond Myklebust02a913a2005-10-18 14:20:17 -07003630 .file_open = nfs_open,
3631 .file_release = nfs_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003632 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00003633 .clear_acl_cache = nfs4_zap_acl_attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634};
3635
3636/*
3637 * Local variables:
3638 * c-basic-offset: 8
3639 * End:
3640 */