nfs4proc.c 96 KB

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  1. /*
  2. * fs/nfs/nfs4proc.c
  3. *
  4. * Client-side procedure declarations for NFSv4.
  5. *
  6. * Copyright (c) 2002 The Regents of the University of Michigan.
  7. * All rights reserved.
  8. *
  9. * Kendrick Smith <kmsmith@umich.edu>
  10. * Andy Adamson <andros@umich.edu>
  11. *
  12. * Redistribution and use in source and binary forms, with or without
  13. * modification, are permitted provided that the following conditions
  14. * are met:
  15. *
  16. * 1. Redistributions of source code must retain the above copyright
  17. * notice, this list of conditions and the following disclaimer.
  18. * 2. Redistributions in binary form must reproduce the above copyright
  19. * notice, this list of conditions and the following disclaimer in the
  20. * documentation and/or other materials provided with the distribution.
  21. * 3. Neither the name of the University nor the names of its
  22. * contributors may be used to endorse or promote products derived
  23. * from this software without specific prior written permission.
  24. *
  25. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27. * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28. * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31. * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32. * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33. * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34. * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36. */
  37. #include <linux/mm.h>
  38. #include <linux/utsname.h>
  39. #include <linux/delay.h>
  40. #include <linux/errno.h>
  41. #include <linux/string.h>
  42. #include <linux/sunrpc/clnt.h>
  43. #include <linux/nfs.h>
  44. #include <linux/nfs4.h>
  45. #include <linux/nfs_fs.h>
  46. #include <linux/nfs_page.h>
  47. #include <linux/smp_lock.h>
  48. #include <linux/namei.h>
  49. #include <linux/mount.h>
  50. #include "nfs4_fs.h"
  51. #include "delegation.h"
  52. #include "iostat.h"
  53. #define NFSDBG_FACILITY NFSDBG_PROC
  54. #define NFS4_POLL_RETRY_MIN (HZ/10)
  55. #define NFS4_POLL_RETRY_MAX (15*HZ)
  56. struct nfs4_opendata;
  57. static int _nfs4_proc_open(struct nfs4_opendata *data);
  58. static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
  59. static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
  60. static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
  61. static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
  62. static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
  63. /* Prevent leaks of NFSv4 errors into userland */
  64. int nfs4_map_errors(int err)
  65. {
  66. if (err < -1000) {
  67. dprintk("%s could not handle NFSv4 error %d\n",
  68. __FUNCTION__, -err);
  69. return -EIO;
  70. }
  71. return err;
  72. }
  73. /*
  74. * This is our standard bitmap for GETATTR requests.
  75. */
  76. const u32 nfs4_fattr_bitmap[2] = {
  77. FATTR4_WORD0_TYPE
  78. | FATTR4_WORD0_CHANGE
  79. | FATTR4_WORD0_SIZE
  80. | FATTR4_WORD0_FSID
  81. | FATTR4_WORD0_FILEID,
  82. FATTR4_WORD1_MODE
  83. | FATTR4_WORD1_NUMLINKS
  84. | FATTR4_WORD1_OWNER
  85. | FATTR4_WORD1_OWNER_GROUP
  86. | FATTR4_WORD1_RAWDEV
  87. | FATTR4_WORD1_SPACE_USED
  88. | FATTR4_WORD1_TIME_ACCESS
  89. | FATTR4_WORD1_TIME_METADATA
  90. | FATTR4_WORD1_TIME_MODIFY
  91. };
  92. const u32 nfs4_statfs_bitmap[2] = {
  93. FATTR4_WORD0_FILES_AVAIL
  94. | FATTR4_WORD0_FILES_FREE
  95. | FATTR4_WORD0_FILES_TOTAL,
  96. FATTR4_WORD1_SPACE_AVAIL
  97. | FATTR4_WORD1_SPACE_FREE
  98. | FATTR4_WORD1_SPACE_TOTAL
  99. };
  100. const u32 nfs4_pathconf_bitmap[2] = {
  101. FATTR4_WORD0_MAXLINK
  102. | FATTR4_WORD0_MAXNAME,
  103. 0
  104. };
  105. const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
  106. | FATTR4_WORD0_MAXREAD
  107. | FATTR4_WORD0_MAXWRITE
  108. | FATTR4_WORD0_LEASE_TIME,
  109. 0
  110. };
  111. const u32 nfs4_fs_locations_bitmap[2] = {
  112. FATTR4_WORD0_TYPE
  113. | FATTR4_WORD0_CHANGE
  114. | FATTR4_WORD0_SIZE
  115. | FATTR4_WORD0_FSID
  116. | FATTR4_WORD0_FILEID
  117. | FATTR4_WORD0_FS_LOCATIONS,
  118. FATTR4_WORD1_MODE
  119. | FATTR4_WORD1_NUMLINKS
  120. | FATTR4_WORD1_OWNER
  121. | FATTR4_WORD1_OWNER_GROUP
  122. | FATTR4_WORD1_RAWDEV
  123. | FATTR4_WORD1_SPACE_USED
  124. | FATTR4_WORD1_TIME_ACCESS
  125. | FATTR4_WORD1_TIME_METADATA
  126. | FATTR4_WORD1_TIME_MODIFY
  127. | FATTR4_WORD1_MOUNTED_ON_FILEID
  128. };
  129. static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
  130. struct nfs4_readdir_arg *readdir)
  131. {
  132. __be32 *start, *p;
  133. BUG_ON(readdir->count < 80);
  134. if (cookie > 2) {
  135. readdir->cookie = cookie;
  136. memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
  137. return;
  138. }
  139. readdir->cookie = 0;
  140. memset(&readdir->verifier, 0, sizeof(readdir->verifier));
  141. if (cookie == 2)
  142. return;
  143. /*
  144. * NFSv4 servers do not return entries for '.' and '..'
  145. * Therefore, we fake these entries here. We let '.'
  146. * have cookie 0 and '..' have cookie 1. Note that
  147. * when talking to the server, we always send cookie 0
  148. * instead of 1 or 2.
  149. */
  150. start = p = kmap_atomic(*readdir->pages, KM_USER0);
  151. if (cookie == 0) {
  152. *p++ = xdr_one; /* next */
  153. *p++ = xdr_zero; /* cookie, first word */
  154. *p++ = xdr_one; /* cookie, second word */
  155. *p++ = xdr_one; /* entry len */
  156. memcpy(p, ".\0\0\0", 4); /* entry */
  157. p++;
  158. *p++ = xdr_one; /* bitmap length */
  159. *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
  160. *p++ = htonl(8); /* attribute buffer length */
  161. p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
  162. }
  163. *p++ = xdr_one; /* next */
  164. *p++ = xdr_zero; /* cookie, first word */
  165. *p++ = xdr_two; /* cookie, second word */
  166. *p++ = xdr_two; /* entry len */
  167. memcpy(p, "..\0\0", 4); /* entry */
  168. p++;
  169. *p++ = xdr_one; /* bitmap length */
  170. *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
  171. *p++ = htonl(8); /* attribute buffer length */
  172. p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
  173. readdir->pgbase = (char *)p - (char *)start;
  174. readdir->count -= readdir->pgbase;
  175. kunmap_atomic(start, KM_USER0);
  176. }
  177. static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
  178. {
  179. struct nfs_client *clp = server->nfs_client;
  180. spin_lock(&clp->cl_lock);
  181. if (time_before(clp->cl_last_renewal,timestamp))
  182. clp->cl_last_renewal = timestamp;
  183. spin_unlock(&clp->cl_lock);
  184. }
  185. static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
  186. {
  187. struct nfs_inode *nfsi = NFS_I(dir);
  188. spin_lock(&dir->i_lock);
  189. nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
  190. if (cinfo->before == nfsi->change_attr && cinfo->atomic)
  191. nfsi->change_attr = cinfo->after;
  192. spin_unlock(&dir->i_lock);
  193. }
  194. struct nfs4_opendata {
  195. atomic_t count;
  196. struct nfs_openargs o_arg;
  197. struct nfs_openres o_res;
  198. struct nfs_open_confirmargs c_arg;
  199. struct nfs_open_confirmres c_res;
  200. struct nfs_fattr f_attr;
  201. struct nfs_fattr dir_attr;
  202. struct dentry *dentry;
  203. struct dentry *dir;
  204. struct nfs4_state_owner *owner;
  205. struct iattr attrs;
  206. unsigned long timestamp;
  207. int rpc_status;
  208. int cancelled;
  209. };
  210. static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
  211. struct nfs4_state_owner *sp, int flags,
  212. const struct iattr *attrs)
  213. {
  214. struct dentry *parent = dget_parent(dentry);
  215. struct inode *dir = parent->d_inode;
  216. struct nfs_server *server = NFS_SERVER(dir);
  217. struct nfs4_opendata *p;
  218. p = kzalloc(sizeof(*p), GFP_KERNEL);
  219. if (p == NULL)
  220. goto err;
  221. p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
  222. if (p->o_arg.seqid == NULL)
  223. goto err_free;
  224. atomic_set(&p->count, 1);
  225. p->dentry = dget(dentry);
  226. p->dir = parent;
  227. p->owner = sp;
  228. atomic_inc(&sp->so_count);
  229. p->o_arg.fh = NFS_FH(dir);
  230. p->o_arg.open_flags = flags,
  231. p->o_arg.clientid = server->nfs_client->cl_clientid;
  232. p->o_arg.id = sp->so_id;
  233. p->o_arg.name = &dentry->d_name;
  234. p->o_arg.server = server;
  235. p->o_arg.bitmask = server->attr_bitmask;
  236. p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
  237. p->o_res.f_attr = &p->f_attr;
  238. p->o_res.dir_attr = &p->dir_attr;
  239. p->o_res.server = server;
  240. nfs_fattr_init(&p->f_attr);
  241. nfs_fattr_init(&p->dir_attr);
  242. if (flags & O_EXCL) {
  243. u32 *s = (u32 *) p->o_arg.u.verifier.data;
  244. s[0] = jiffies;
  245. s[1] = current->pid;
  246. } else if (flags & O_CREAT) {
  247. p->o_arg.u.attrs = &p->attrs;
  248. memcpy(&p->attrs, attrs, sizeof(p->attrs));
  249. }
  250. p->c_arg.fh = &p->o_res.fh;
  251. p->c_arg.stateid = &p->o_res.stateid;
  252. p->c_arg.seqid = p->o_arg.seqid;
  253. return p;
  254. err_free:
  255. kfree(p);
  256. err:
  257. dput(parent);
  258. return NULL;
  259. }
  260. static void nfs4_opendata_free(struct nfs4_opendata *p)
  261. {
  262. if (p != NULL && atomic_dec_and_test(&p->count)) {
  263. nfs_free_seqid(p->o_arg.seqid);
  264. nfs4_put_state_owner(p->owner);
  265. dput(p->dir);
  266. dput(p->dentry);
  267. kfree(p);
  268. }
  269. }
  270. /* Helper for asynchronous RPC calls */
  271. static int nfs4_call_async(struct rpc_clnt *clnt,
  272. const struct rpc_call_ops *tk_ops, void *calldata)
  273. {
  274. struct rpc_task *task;
  275. if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
  276. return -ENOMEM;
  277. rpc_execute(task);
  278. return 0;
  279. }
  280. static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
  281. {
  282. sigset_t oldset;
  283. int ret;
  284. rpc_clnt_sigmask(task->tk_client, &oldset);
  285. ret = rpc_wait_for_completion_task(task);
  286. rpc_clnt_sigunmask(task->tk_client, &oldset);
  287. return ret;
  288. }
  289. static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
  290. {
  291. switch (open_flags) {
  292. case FMODE_WRITE:
  293. state->n_wronly++;
  294. break;
  295. case FMODE_READ:
  296. state->n_rdonly++;
  297. break;
  298. case FMODE_READ|FMODE_WRITE:
  299. state->n_rdwr++;
  300. }
  301. }
  302. static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
  303. {
  304. struct inode *inode = state->inode;
  305. open_flags &= (FMODE_READ|FMODE_WRITE);
  306. /* Protect against nfs4_find_state_byowner() */
  307. spin_lock(&state->owner->so_lock);
  308. spin_lock(&inode->i_lock);
  309. memcpy(&state->stateid, stateid, sizeof(state->stateid));
  310. update_open_stateflags(state, open_flags);
  311. nfs4_state_set_mode_locked(state, state->state | open_flags);
  312. spin_unlock(&inode->i_lock);
  313. spin_unlock(&state->owner->so_lock);
  314. }
  315. static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
  316. {
  317. struct inode *inode;
  318. struct nfs4_state *state = NULL;
  319. if (!(data->f_attr.valid & NFS_ATTR_FATTR))
  320. goto out;
  321. inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
  322. if (IS_ERR(inode))
  323. goto out;
  324. state = nfs4_get_open_state(inode, data->owner);
  325. if (state == NULL)
  326. goto put_inode;
  327. update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
  328. put_inode:
  329. iput(inode);
  330. out:
  331. return state;
  332. }
  333. static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
  334. {
  335. struct nfs_inode *nfsi = NFS_I(state->inode);
  336. struct nfs_open_context *ctx;
  337. spin_lock(&state->inode->i_lock);
  338. list_for_each_entry(ctx, &nfsi->open_files, list) {
  339. if (ctx->state != state)
  340. continue;
  341. get_nfs_open_context(ctx);
  342. spin_unlock(&state->inode->i_lock);
  343. return ctx;
  344. }
  345. spin_unlock(&state->inode->i_lock);
  346. return ERR_PTR(-ENOENT);
  347. }
  348. static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
  349. {
  350. int ret;
  351. opendata->o_arg.open_flags = openflags;
  352. ret = _nfs4_proc_open(opendata);
  353. if (ret != 0)
  354. return ret;
  355. memcpy(stateid->data, opendata->o_res.stateid.data,
  356. sizeof(stateid->data));
  357. return 0;
  358. }
  359. static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
  360. {
  361. nfs4_stateid stateid;
  362. struct nfs4_state *newstate;
  363. int mode = 0;
  364. int delegation = 0;
  365. int ret;
  366. /* memory barrier prior to reading state->n_* */
  367. smp_rmb();
  368. if (state->n_rdwr != 0) {
  369. ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
  370. if (ret != 0)
  371. return ret;
  372. mode |= FMODE_READ|FMODE_WRITE;
  373. if (opendata->o_res.delegation_type != 0)
  374. delegation = opendata->o_res.delegation_type;
  375. smp_rmb();
  376. }
  377. if (state->n_wronly != 0) {
  378. ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
  379. if (ret != 0)
  380. return ret;
  381. mode |= FMODE_WRITE;
  382. if (opendata->o_res.delegation_type != 0)
  383. delegation = opendata->o_res.delegation_type;
  384. smp_rmb();
  385. }
  386. if (state->n_rdonly != 0) {
  387. ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
  388. if (ret != 0)
  389. return ret;
  390. mode |= FMODE_READ;
  391. }
  392. clear_bit(NFS_DELEGATED_STATE, &state->flags);
  393. if (mode == 0)
  394. return 0;
  395. if (opendata->o_res.delegation_type == 0)
  396. opendata->o_res.delegation_type = delegation;
  397. opendata->o_arg.open_flags |= mode;
  398. newstate = nfs4_opendata_to_nfs4_state(opendata);
  399. if (newstate != NULL) {
  400. if (opendata->o_res.delegation_type != 0) {
  401. struct nfs_inode *nfsi = NFS_I(newstate->inode);
  402. int delegation_flags = 0;
  403. if (nfsi->delegation)
  404. delegation_flags = nfsi->delegation->flags;
  405. if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
  406. nfs_inode_set_delegation(newstate->inode,
  407. opendata->owner->so_cred,
  408. &opendata->o_res);
  409. else
  410. nfs_inode_reclaim_delegation(newstate->inode,
  411. opendata->owner->so_cred,
  412. &opendata->o_res);
  413. }
  414. nfs4_close_state(newstate, opendata->o_arg.open_flags);
  415. }
  416. if (newstate != state)
  417. return -ESTALE;
  418. return 0;
  419. }
  420. /*
  421. * OPEN_RECLAIM:
  422. * reclaim state on the server after a reboot.
  423. */
  424. static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
  425. {
  426. struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
  427. struct nfs4_opendata *opendata;
  428. int delegation_type = 0;
  429. int status;
  430. if (delegation != NULL) {
  431. if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
  432. memcpy(&state->stateid, &delegation->stateid,
  433. sizeof(state->stateid));
  434. set_bit(NFS_DELEGATED_STATE, &state->flags);
  435. return 0;
  436. }
  437. delegation_type = delegation->type;
  438. }
  439. opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
  440. if (opendata == NULL)
  441. return -ENOMEM;
  442. opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
  443. opendata->o_arg.fh = NFS_FH(state->inode);
  444. nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
  445. opendata->o_arg.u.delegation_type = delegation_type;
  446. status = nfs4_open_recover(opendata, state);
  447. nfs4_opendata_free(opendata);
  448. return status;
  449. }
  450. static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
  451. {
  452. struct nfs_server *server = NFS_SERVER(state->inode);
  453. struct nfs4_exception exception = { };
  454. int err;
  455. do {
  456. err = _nfs4_do_open_reclaim(sp, state, dentry);
  457. if (err != -NFS4ERR_DELAY)
  458. break;
  459. nfs4_handle_exception(server, err, &exception);
  460. } while (exception.retry);
  461. return err;
  462. }
  463. static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
  464. {
  465. struct nfs_open_context *ctx;
  466. int ret;
  467. ctx = nfs4_state_find_open_context(state);
  468. if (IS_ERR(ctx))
  469. return PTR_ERR(ctx);
  470. ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
  471. put_nfs_open_context(ctx);
  472. return ret;
  473. }
  474. static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
  475. {
  476. struct nfs4_state_owner *sp = state->owner;
  477. struct nfs4_opendata *opendata;
  478. int ret;
  479. if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
  480. return 0;
  481. opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
  482. if (opendata == NULL)
  483. return -ENOMEM;
  484. opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
  485. memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
  486. sizeof(opendata->o_arg.u.delegation.data));
  487. ret = nfs4_open_recover(opendata, state);
  488. nfs4_opendata_free(opendata);
  489. return ret;
  490. }
  491. int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
  492. {
  493. struct nfs4_exception exception = { };
  494. struct nfs_server *server = NFS_SERVER(dentry->d_inode);
  495. int err;
  496. do {
  497. err = _nfs4_open_delegation_recall(dentry, state);
  498. switch (err) {
  499. case 0:
  500. return err;
  501. case -NFS4ERR_STALE_CLIENTID:
  502. case -NFS4ERR_STALE_STATEID:
  503. case -NFS4ERR_EXPIRED:
  504. /* Don't recall a delegation if it was lost */
  505. nfs4_schedule_state_recovery(server->nfs_client);
  506. return err;
  507. }
  508. err = nfs4_handle_exception(server, err, &exception);
  509. } while (exception.retry);
  510. return err;
  511. }
  512. static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
  513. {
  514. struct nfs4_opendata *data = calldata;
  515. struct rpc_message msg = {
  516. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
  517. .rpc_argp = &data->c_arg,
  518. .rpc_resp = &data->c_res,
  519. .rpc_cred = data->owner->so_cred,
  520. };
  521. data->timestamp = jiffies;
  522. rpc_call_setup(task, &msg, 0);
  523. }
  524. static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
  525. {
  526. struct nfs4_opendata *data = calldata;
  527. data->rpc_status = task->tk_status;
  528. if (RPC_ASSASSINATED(task))
  529. return;
  530. if (data->rpc_status == 0) {
  531. memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
  532. sizeof(data->o_res.stateid.data));
  533. renew_lease(data->o_res.server, data->timestamp);
  534. }
  535. nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
  536. nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
  537. }
  538. static void nfs4_open_confirm_release(void *calldata)
  539. {
  540. struct nfs4_opendata *data = calldata;
  541. struct nfs4_state *state = NULL;
  542. /* If this request hasn't been cancelled, do nothing */
  543. if (data->cancelled == 0)
  544. goto out_free;
  545. /* In case of error, no cleanup! */
  546. if (data->rpc_status != 0)
  547. goto out_free;
  548. nfs_confirm_seqid(&data->owner->so_seqid, 0);
  549. state = nfs4_opendata_to_nfs4_state(data);
  550. if (state != NULL)
  551. nfs4_close_state(state, data->o_arg.open_flags);
  552. out_free:
  553. nfs4_opendata_free(data);
  554. }
  555. static const struct rpc_call_ops nfs4_open_confirm_ops = {
  556. .rpc_call_prepare = nfs4_open_confirm_prepare,
  557. .rpc_call_done = nfs4_open_confirm_done,
  558. .rpc_release = nfs4_open_confirm_release,
  559. };
  560. /*
  561. * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
  562. */
  563. static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
  564. {
  565. struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
  566. struct rpc_task *task;
  567. int status;
  568. atomic_inc(&data->count);
  569. /*
  570. * If rpc_run_task() ends up calling ->rpc_release(), we
  571. * want to ensure that it takes the 'error' code path.
  572. */
  573. data->rpc_status = -ENOMEM;
  574. task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
  575. if (IS_ERR(task))
  576. return PTR_ERR(task);
  577. status = nfs4_wait_for_completion_rpc_task(task);
  578. if (status != 0) {
  579. data->cancelled = 1;
  580. smp_wmb();
  581. } else
  582. status = data->rpc_status;
  583. rpc_put_task(task);
  584. return status;
  585. }
  586. static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
  587. {
  588. struct nfs4_opendata *data = calldata;
  589. struct nfs4_state_owner *sp = data->owner;
  590. struct rpc_message msg = {
  591. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
  592. .rpc_argp = &data->o_arg,
  593. .rpc_resp = &data->o_res,
  594. .rpc_cred = sp->so_cred,
  595. };
  596. if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
  597. return;
  598. /* Update sequence id. */
  599. data->o_arg.id = sp->so_id;
  600. data->o_arg.clientid = sp->so_client->cl_clientid;
  601. if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
  602. msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
  603. data->timestamp = jiffies;
  604. rpc_call_setup(task, &msg, 0);
  605. }
  606. static void nfs4_open_done(struct rpc_task *task, void *calldata)
  607. {
  608. struct nfs4_opendata *data = calldata;
  609. data->rpc_status = task->tk_status;
  610. if (RPC_ASSASSINATED(task))
  611. return;
  612. if (task->tk_status == 0) {
  613. switch (data->o_res.f_attr->mode & S_IFMT) {
  614. case S_IFREG:
  615. break;
  616. case S_IFLNK:
  617. data->rpc_status = -ELOOP;
  618. break;
  619. case S_IFDIR:
  620. data->rpc_status = -EISDIR;
  621. break;
  622. default:
  623. data->rpc_status = -ENOTDIR;
  624. }
  625. renew_lease(data->o_res.server, data->timestamp);
  626. }
  627. nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
  628. }
  629. static void nfs4_open_release(void *calldata)
  630. {
  631. struct nfs4_opendata *data = calldata;
  632. struct nfs4_state *state = NULL;
  633. /* If this request hasn't been cancelled, do nothing */
  634. if (data->cancelled == 0)
  635. goto out_free;
  636. /* In case of error, no cleanup! */
  637. if (data->rpc_status != 0)
  638. goto out_free;
  639. /* In case we need an open_confirm, no cleanup! */
  640. if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
  641. goto out_free;
  642. nfs_confirm_seqid(&data->owner->so_seqid, 0);
  643. state = nfs4_opendata_to_nfs4_state(data);
  644. if (state != NULL)
  645. nfs4_close_state(state, data->o_arg.open_flags);
  646. out_free:
  647. nfs4_opendata_free(data);
  648. }
  649. static const struct rpc_call_ops nfs4_open_ops = {
  650. .rpc_call_prepare = nfs4_open_prepare,
  651. .rpc_call_done = nfs4_open_done,
  652. .rpc_release = nfs4_open_release,
  653. };
  654. /*
  655. * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
  656. */
  657. static int _nfs4_proc_open(struct nfs4_opendata *data)
  658. {
  659. struct inode *dir = data->dir->d_inode;
  660. struct nfs_server *server = NFS_SERVER(dir);
  661. struct nfs_openargs *o_arg = &data->o_arg;
  662. struct nfs_openres *o_res = &data->o_res;
  663. struct rpc_task *task;
  664. int status;
  665. atomic_inc(&data->count);
  666. /*
  667. * If rpc_run_task() ends up calling ->rpc_release(), we
  668. * want to ensure that it takes the 'error' code path.
  669. */
  670. data->rpc_status = -ENOMEM;
  671. task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
  672. if (IS_ERR(task))
  673. return PTR_ERR(task);
  674. status = nfs4_wait_for_completion_rpc_task(task);
  675. if (status != 0) {
  676. data->cancelled = 1;
  677. smp_wmb();
  678. } else
  679. status = data->rpc_status;
  680. rpc_put_task(task);
  681. if (status != 0)
  682. return status;
  683. if (o_arg->open_flags & O_CREAT) {
  684. update_changeattr(dir, &o_res->cinfo);
  685. nfs_post_op_update_inode(dir, o_res->dir_attr);
  686. } else
  687. nfs_refresh_inode(dir, o_res->dir_attr);
  688. if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
  689. status = _nfs4_proc_open_confirm(data);
  690. if (status != 0)
  691. return status;
  692. }
  693. nfs_confirm_seqid(&data->owner->so_seqid, 0);
  694. if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
  695. return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
  696. return 0;
  697. }
  698. static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
  699. {
  700. struct nfs_access_entry cache;
  701. int mask = 0;
  702. int status;
  703. if (openflags & FMODE_READ)
  704. mask |= MAY_READ;
  705. if (openflags & FMODE_WRITE)
  706. mask |= MAY_WRITE;
  707. status = nfs_access_get_cached(inode, cred, &cache);
  708. if (status == 0)
  709. goto out;
  710. /* Be clever: ask server to check for all possible rights */
  711. cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
  712. cache.cred = cred;
  713. cache.jiffies = jiffies;
  714. status = _nfs4_proc_access(inode, &cache);
  715. if (status != 0)
  716. return status;
  717. nfs_access_add_cache(inode, &cache);
  718. out:
  719. if ((cache.mask & mask) == mask)
  720. return 0;
  721. return -EACCES;
  722. }
  723. int nfs4_recover_expired_lease(struct nfs_server *server)
  724. {
  725. struct nfs_client *clp = server->nfs_client;
  726. int ret;
  727. for (;;) {
  728. ret = nfs4_wait_clnt_recover(server->client, clp);
  729. if (ret != 0)
  730. return ret;
  731. if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
  732. break;
  733. nfs4_schedule_state_recovery(clp);
  734. }
  735. return 0;
  736. }
  737. /*
  738. * OPEN_EXPIRED:
  739. * reclaim state on the server after a network partition.
  740. * Assumes caller holds the appropriate lock
  741. */
  742. static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
  743. {
  744. struct inode *inode = state->inode;
  745. struct nfs_delegation *delegation = NFS_I(inode)->delegation;
  746. struct nfs4_opendata *opendata;
  747. int openflags = state->state & (FMODE_READ|FMODE_WRITE);
  748. int ret;
  749. if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
  750. ret = _nfs4_do_access(inode, sp->so_cred, openflags);
  751. if (ret < 0)
  752. return ret;
  753. memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
  754. set_bit(NFS_DELEGATED_STATE, &state->flags);
  755. return 0;
  756. }
  757. opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
  758. if (opendata == NULL)
  759. return -ENOMEM;
  760. ret = nfs4_open_recover(opendata, state);
  761. if (ret == -ESTALE) {
  762. /* Invalidate the state owner so we don't ever use it again */
  763. nfs4_drop_state_owner(sp);
  764. d_drop(dentry);
  765. }
  766. nfs4_opendata_free(opendata);
  767. return ret;
  768. }
  769. static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
  770. {
  771. struct nfs_server *server = NFS_SERVER(dentry->d_inode);
  772. struct nfs4_exception exception = { };
  773. int err;
  774. do {
  775. err = _nfs4_open_expired(sp, state, dentry);
  776. if (err == -NFS4ERR_DELAY)
  777. nfs4_handle_exception(server, err, &exception);
  778. } while (exception.retry);
  779. return err;
  780. }
  781. static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
  782. {
  783. struct nfs_open_context *ctx;
  784. int ret;
  785. ctx = nfs4_state_find_open_context(state);
  786. if (IS_ERR(ctx))
  787. return PTR_ERR(ctx);
  788. ret = nfs4_do_open_expired(sp, state, ctx->dentry);
  789. put_nfs_open_context(ctx);
  790. return ret;
  791. }
  792. /*
  793. * Returns a referenced nfs4_state if there is an open delegation on the file
  794. */
  795. static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
  796. {
  797. struct nfs_delegation *delegation;
  798. struct nfs_server *server = NFS_SERVER(inode);
  799. struct nfs_client *clp = server->nfs_client;
  800. struct nfs_inode *nfsi = NFS_I(inode);
  801. struct nfs4_state_owner *sp = NULL;
  802. struct nfs4_state *state = NULL;
  803. int open_flags = flags & (FMODE_READ|FMODE_WRITE);
  804. int err;
  805. err = -ENOMEM;
  806. if (!(sp = nfs4_get_state_owner(server, cred))) {
  807. dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
  808. return err;
  809. }
  810. err = nfs4_recover_expired_lease(server);
  811. if (err != 0)
  812. goto out_put_state_owner;
  813. /* Protect against reboot recovery - NOTE ORDER! */
  814. down_read(&clp->cl_sem);
  815. /* Protect against delegation recall */
  816. down_read(&nfsi->rwsem);
  817. delegation = NFS_I(inode)->delegation;
  818. err = -ENOENT;
  819. if (delegation == NULL || (delegation->type & open_flags) != open_flags)
  820. goto out_err;
  821. err = -ENOMEM;
  822. state = nfs4_get_open_state(inode, sp);
  823. if (state == NULL)
  824. goto out_err;
  825. err = -ENOENT;
  826. if ((state->state & open_flags) == open_flags) {
  827. spin_lock(&inode->i_lock);
  828. update_open_stateflags(state, open_flags);
  829. spin_unlock(&inode->i_lock);
  830. goto out_ok;
  831. } else if (state->state != 0)
  832. goto out_put_open_state;
  833. lock_kernel();
  834. err = _nfs4_do_access(inode, cred, open_flags);
  835. unlock_kernel();
  836. if (err != 0)
  837. goto out_put_open_state;
  838. set_bit(NFS_DELEGATED_STATE, &state->flags);
  839. update_open_stateid(state, &delegation->stateid, open_flags);
  840. out_ok:
  841. nfs4_put_state_owner(sp);
  842. up_read(&nfsi->rwsem);
  843. up_read(&clp->cl_sem);
  844. *res = state;
  845. return 0;
  846. out_put_open_state:
  847. nfs4_put_open_state(state);
  848. out_err:
  849. up_read(&nfsi->rwsem);
  850. up_read(&clp->cl_sem);
  851. if (err != -EACCES)
  852. nfs_inode_return_delegation(inode);
  853. out_put_state_owner:
  854. nfs4_put_state_owner(sp);
  855. return err;
  856. }
  857. static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
  858. {
  859. struct nfs4_exception exception = { };
  860. struct nfs4_state *res = ERR_PTR(-EIO);
  861. int err;
  862. do {
  863. err = _nfs4_open_delegated(inode, flags, cred, &res);
  864. if (err == 0)
  865. break;
  866. res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
  867. err, &exception));
  868. } while (exception.retry);
  869. return res;
  870. }
  871. /*
  872. * Returns a referenced nfs4_state
  873. */
  874. static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
  875. {
  876. struct nfs4_state_owner *sp;
  877. struct nfs4_state *state = NULL;
  878. struct nfs_server *server = NFS_SERVER(dir);
  879. struct nfs_client *clp = server->nfs_client;
  880. struct nfs4_opendata *opendata;
  881. int status;
  882. /* Protect against reboot recovery conflicts */
  883. status = -ENOMEM;
  884. if (!(sp = nfs4_get_state_owner(server, cred))) {
  885. dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
  886. goto out_err;
  887. }
  888. status = nfs4_recover_expired_lease(server);
  889. if (status != 0)
  890. goto err_put_state_owner;
  891. down_read(&clp->cl_sem);
  892. status = -ENOMEM;
  893. opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
  894. if (opendata == NULL)
  895. goto err_release_rwsem;
  896. status = _nfs4_proc_open(opendata);
  897. if (status != 0)
  898. goto err_opendata_free;
  899. status = -ENOMEM;
  900. state = nfs4_opendata_to_nfs4_state(opendata);
  901. if (state == NULL)
  902. goto err_opendata_free;
  903. if (opendata->o_res.delegation_type != 0)
  904. nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
  905. nfs4_opendata_free(opendata);
  906. nfs4_put_state_owner(sp);
  907. up_read(&clp->cl_sem);
  908. *res = state;
  909. return 0;
  910. err_opendata_free:
  911. nfs4_opendata_free(opendata);
  912. err_release_rwsem:
  913. up_read(&clp->cl_sem);
  914. err_put_state_owner:
  915. nfs4_put_state_owner(sp);
  916. out_err:
  917. *res = NULL;
  918. return status;
  919. }
  920. static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
  921. {
  922. struct nfs4_exception exception = { };
  923. struct nfs4_state *res;
  924. int status;
  925. do {
  926. status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
  927. if (status == 0)
  928. break;
  929. /* NOTE: BAD_SEQID means the server and client disagree about the
  930. * book-keeping w.r.t. state-changing operations
  931. * (OPEN/CLOSE/LOCK/LOCKU...)
  932. * It is actually a sign of a bug on the client or on the server.
  933. *
  934. * If we receive a BAD_SEQID error in the particular case of
  935. * doing an OPEN, we assume that nfs_increment_open_seqid() will
  936. * have unhashed the old state_owner for us, and that we can
  937. * therefore safely retry using a new one. We should still warn
  938. * the user though...
  939. */
  940. if (status == -NFS4ERR_BAD_SEQID) {
  941. printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
  942. exception.retry = 1;
  943. continue;
  944. }
  945. /*
  946. * BAD_STATEID on OPEN means that the server cancelled our
  947. * state before it received the OPEN_CONFIRM.
  948. * Recover by retrying the request as per the discussion
  949. * on Page 181 of RFC3530.
  950. */
  951. if (status == -NFS4ERR_BAD_STATEID) {
  952. exception.retry = 1;
  953. continue;
  954. }
  955. res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
  956. status, &exception));
  957. } while (exception.retry);
  958. return res;
  959. }
  960. static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
  961. struct iattr *sattr, struct nfs4_state *state)
  962. {
  963. struct nfs_server *server = NFS_SERVER(inode);
  964. struct nfs_setattrargs arg = {
  965. .fh = NFS_FH(inode),
  966. .iap = sattr,
  967. .server = server,
  968. .bitmask = server->attr_bitmask,
  969. };
  970. struct nfs_setattrres res = {
  971. .fattr = fattr,
  972. .server = server,
  973. };
  974. struct rpc_message msg = {
  975. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
  976. .rpc_argp = &arg,
  977. .rpc_resp = &res,
  978. };
  979. unsigned long timestamp = jiffies;
  980. int status;
  981. nfs_fattr_init(fattr);
  982. if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
  983. /* Use that stateid */
  984. } else if (state != NULL) {
  985. msg.rpc_cred = state->owner->so_cred;
  986. nfs4_copy_stateid(&arg.stateid, state, current->files);
  987. } else
  988. memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
  989. status = rpc_call_sync(server->client, &msg, 0);
  990. if (status == 0 && state != NULL)
  991. renew_lease(server, timestamp);
  992. return status;
  993. }
  994. static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
  995. struct iattr *sattr, struct nfs4_state *state)
  996. {
  997. struct nfs_server *server = NFS_SERVER(inode);
  998. struct nfs4_exception exception = { };
  999. int err;
  1000. do {
  1001. err = nfs4_handle_exception(server,
  1002. _nfs4_do_setattr(inode, fattr, sattr, state),
  1003. &exception);
  1004. } while (exception.retry);
  1005. return err;
  1006. }
  1007. struct nfs4_closedata {
  1008. struct inode *inode;
  1009. struct nfs4_state *state;
  1010. struct nfs_closeargs arg;
  1011. struct nfs_closeres res;
  1012. struct nfs_fattr fattr;
  1013. unsigned long timestamp;
  1014. };
  1015. static void nfs4_free_closedata(void *data)
  1016. {
  1017. struct nfs4_closedata *calldata = data;
  1018. struct nfs4_state_owner *sp = calldata->state->owner;
  1019. nfs4_put_open_state(calldata->state);
  1020. nfs_free_seqid(calldata->arg.seqid);
  1021. nfs4_put_state_owner(sp);
  1022. kfree(calldata);
  1023. }
  1024. static void nfs4_close_done(struct rpc_task *task, void *data)
  1025. {
  1026. struct nfs4_closedata *calldata = data;
  1027. struct nfs4_state *state = calldata->state;
  1028. struct nfs_server *server = NFS_SERVER(calldata->inode);
  1029. if (RPC_ASSASSINATED(task))
  1030. return;
  1031. /* hmm. we are done with the inode, and in the process of freeing
  1032. * the state_owner. we keep this around to process errors
  1033. */
  1034. nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
  1035. switch (task->tk_status) {
  1036. case 0:
  1037. memcpy(&state->stateid, &calldata->res.stateid,
  1038. sizeof(state->stateid));
  1039. renew_lease(server, calldata->timestamp);
  1040. break;
  1041. case -NFS4ERR_STALE_STATEID:
  1042. case -NFS4ERR_EXPIRED:
  1043. break;
  1044. default:
  1045. if (nfs4_async_handle_error(task, server) == -EAGAIN) {
  1046. rpc_restart_call(task);
  1047. return;
  1048. }
  1049. }
  1050. nfs_refresh_inode(calldata->inode, calldata->res.fattr);
  1051. }
  1052. static void nfs4_close_prepare(struct rpc_task *task, void *data)
  1053. {
  1054. struct nfs4_closedata *calldata = data;
  1055. struct nfs4_state *state = calldata->state;
  1056. struct rpc_message msg = {
  1057. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
  1058. .rpc_argp = &calldata->arg,
  1059. .rpc_resp = &calldata->res,
  1060. .rpc_cred = state->owner->so_cred,
  1061. };
  1062. int mode = 0, old_mode;
  1063. if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
  1064. return;
  1065. /* Recalculate the new open mode in case someone reopened the file
  1066. * while we were waiting in line to be scheduled.
  1067. */
  1068. spin_lock(&state->owner->so_lock);
  1069. spin_lock(&calldata->inode->i_lock);
  1070. mode = old_mode = state->state;
  1071. if (state->n_rdwr == 0) {
  1072. if (state->n_rdonly == 0)
  1073. mode &= ~FMODE_READ;
  1074. if (state->n_wronly == 0)
  1075. mode &= ~FMODE_WRITE;
  1076. }
  1077. nfs4_state_set_mode_locked(state, mode);
  1078. spin_unlock(&calldata->inode->i_lock);
  1079. spin_unlock(&state->owner->so_lock);
  1080. if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
  1081. /* Note: exit _without_ calling nfs4_close_done */
  1082. task->tk_action = NULL;
  1083. return;
  1084. }
  1085. nfs_fattr_init(calldata->res.fattr);
  1086. if (mode != 0)
  1087. msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
  1088. calldata->arg.open_flags = mode;
  1089. calldata->timestamp = jiffies;
  1090. rpc_call_setup(task, &msg, 0);
  1091. }
  1092. static const struct rpc_call_ops nfs4_close_ops = {
  1093. .rpc_call_prepare = nfs4_close_prepare,
  1094. .rpc_call_done = nfs4_close_done,
  1095. .rpc_release = nfs4_free_closedata,
  1096. };
  1097. /*
  1098. * It is possible for data to be read/written from a mem-mapped file
  1099. * after the sys_close call (which hits the vfs layer as a flush).
  1100. * This means that we can't safely call nfsv4 close on a file until
  1101. * the inode is cleared. This in turn means that we are not good
  1102. * NFSv4 citizens - we do not indicate to the server to update the file's
  1103. * share state even when we are done with one of the three share
  1104. * stateid's in the inode.
  1105. *
  1106. * NOTE: Caller must be holding the sp->so_owner semaphore!
  1107. */
  1108. int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
  1109. {
  1110. struct nfs_server *server = NFS_SERVER(inode);
  1111. struct nfs4_closedata *calldata;
  1112. int status = -ENOMEM;
  1113. calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
  1114. if (calldata == NULL)
  1115. goto out;
  1116. calldata->inode = inode;
  1117. calldata->state = state;
  1118. calldata->arg.fh = NFS_FH(inode);
  1119. calldata->arg.stateid = &state->stateid;
  1120. /* Serialization for the sequence id */
  1121. calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
  1122. if (calldata->arg.seqid == NULL)
  1123. goto out_free_calldata;
  1124. calldata->arg.bitmask = server->attr_bitmask;
  1125. calldata->res.fattr = &calldata->fattr;
  1126. calldata->res.server = server;
  1127. status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
  1128. if (status == 0)
  1129. goto out;
  1130. nfs_free_seqid(calldata->arg.seqid);
  1131. out_free_calldata:
  1132. kfree(calldata);
  1133. out:
  1134. return status;
  1135. }
  1136. static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
  1137. {
  1138. struct file *filp;
  1139. filp = lookup_instantiate_filp(nd, dentry, NULL);
  1140. if (!IS_ERR(filp)) {
  1141. struct nfs_open_context *ctx;
  1142. ctx = (struct nfs_open_context *)filp->private_data;
  1143. ctx->state = state;
  1144. return 0;
  1145. }
  1146. nfs4_close_state(state, nd->intent.open.flags);
  1147. return PTR_ERR(filp);
  1148. }
  1149. struct dentry *
  1150. nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
  1151. {
  1152. struct iattr attr;
  1153. struct rpc_cred *cred;
  1154. struct nfs4_state *state;
  1155. struct dentry *res;
  1156. if (nd->flags & LOOKUP_CREATE) {
  1157. attr.ia_mode = nd->intent.open.create_mode;
  1158. attr.ia_valid = ATTR_MODE;
  1159. if (!IS_POSIXACL(dir))
  1160. attr.ia_mode &= ~current->fs->umask;
  1161. } else {
  1162. attr.ia_valid = 0;
  1163. BUG_ON(nd->intent.open.flags & O_CREAT);
  1164. }
  1165. cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
  1166. if (IS_ERR(cred))
  1167. return (struct dentry *)cred;
  1168. state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
  1169. put_rpccred(cred);
  1170. if (IS_ERR(state)) {
  1171. if (PTR_ERR(state) == -ENOENT)
  1172. d_add(dentry, NULL);
  1173. return (struct dentry *)state;
  1174. }
  1175. res = d_add_unique(dentry, igrab(state->inode));
  1176. if (res != NULL)
  1177. dentry = res;
  1178. nfs4_intent_set_file(nd, dentry, state);
  1179. return res;
  1180. }
  1181. int
  1182. nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
  1183. {
  1184. struct rpc_cred *cred;
  1185. struct nfs4_state *state;
  1186. cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
  1187. if (IS_ERR(cred))
  1188. return PTR_ERR(cred);
  1189. state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
  1190. if (IS_ERR(state))
  1191. state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
  1192. put_rpccred(cred);
  1193. if (IS_ERR(state)) {
  1194. switch (PTR_ERR(state)) {
  1195. case -EPERM:
  1196. case -EACCES:
  1197. case -EDQUOT:
  1198. case -ENOSPC:
  1199. case -EROFS:
  1200. lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
  1201. return 1;
  1202. default:
  1203. goto out_drop;
  1204. }
  1205. }
  1206. if (state->inode == dentry->d_inode) {
  1207. nfs4_intent_set_file(nd, dentry, state);
  1208. return 1;
  1209. }
  1210. nfs4_close_state(state, openflags);
  1211. out_drop:
  1212. d_drop(dentry);
  1213. return 0;
  1214. }
  1215. static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
  1216. {
  1217. struct nfs4_server_caps_res res = {};
  1218. struct rpc_message msg = {
  1219. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
  1220. .rpc_argp = fhandle,
  1221. .rpc_resp = &res,
  1222. };
  1223. int status;
  1224. status = rpc_call_sync(server->client, &msg, 0);
  1225. if (status == 0) {
  1226. memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
  1227. if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
  1228. server->caps |= NFS_CAP_ACLS;
  1229. if (res.has_links != 0)
  1230. server->caps |= NFS_CAP_HARDLINKS;
  1231. if (res.has_symlinks != 0)
  1232. server->caps |= NFS_CAP_SYMLINKS;
  1233. server->acl_bitmask = res.acl_bitmask;
  1234. }
  1235. return status;
  1236. }
  1237. int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
  1238. {
  1239. struct nfs4_exception exception = { };
  1240. int err;
  1241. do {
  1242. err = nfs4_handle_exception(server,
  1243. _nfs4_server_capabilities(server, fhandle),
  1244. &exception);
  1245. } while (exception.retry);
  1246. return err;
  1247. }
  1248. static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
  1249. struct nfs_fsinfo *info)
  1250. {
  1251. struct nfs4_lookup_root_arg args = {
  1252. .bitmask = nfs4_fattr_bitmap,
  1253. };
  1254. struct nfs4_lookup_res res = {
  1255. .server = server,
  1256. .fattr = info->fattr,
  1257. .fh = fhandle,
  1258. };
  1259. struct rpc_message msg = {
  1260. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
  1261. .rpc_argp = &args,
  1262. .rpc_resp = &res,
  1263. };
  1264. nfs_fattr_init(info->fattr);
  1265. return rpc_call_sync(server->client, &msg, 0);
  1266. }
  1267. static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
  1268. struct nfs_fsinfo *info)
  1269. {
  1270. struct nfs4_exception exception = { };
  1271. int err;
  1272. do {
  1273. err = nfs4_handle_exception(server,
  1274. _nfs4_lookup_root(server, fhandle, info),
  1275. &exception);
  1276. } while (exception.retry);
  1277. return err;
  1278. }
  1279. /*
  1280. * get the file handle for the "/" directory on the server
  1281. */
  1282. static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  1283. struct nfs_fsinfo *info)
  1284. {
  1285. int status;
  1286. status = nfs4_lookup_root(server, fhandle, info);
  1287. if (status == 0)
  1288. status = nfs4_server_capabilities(server, fhandle);
  1289. if (status == 0)
  1290. status = nfs4_do_fsinfo(server, fhandle, info);
  1291. return nfs4_map_errors(status);
  1292. }
  1293. /*
  1294. * Get locations and (maybe) other attributes of a referral.
  1295. * Note that we'll actually follow the referral later when
  1296. * we detect fsid mismatch in inode revalidation
  1297. */
  1298. static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
  1299. {
  1300. int status = -ENOMEM;
  1301. struct page *page = NULL;
  1302. struct nfs4_fs_locations *locations = NULL;
  1303. page = alloc_page(GFP_KERNEL);
  1304. if (page == NULL)
  1305. goto out;
  1306. locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
  1307. if (locations == NULL)
  1308. goto out;
  1309. status = nfs4_proc_fs_locations(dir, name, locations, page);
  1310. if (status != 0)
  1311. goto out;
  1312. /* Make sure server returned a different fsid for the referral */
  1313. if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
  1314. dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
  1315. status = -EIO;
  1316. goto out;
  1317. }
  1318. memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
  1319. fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
  1320. if (!fattr->mode)
  1321. fattr->mode = S_IFDIR;
  1322. memset(fhandle, 0, sizeof(struct nfs_fh));
  1323. out:
  1324. if (page)
  1325. __free_page(page);
  1326. if (locations)
  1327. kfree(locations);
  1328. return status;
  1329. }
  1330. static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
  1331. {
  1332. struct nfs4_getattr_arg args = {
  1333. .fh = fhandle,
  1334. .bitmask = server->attr_bitmask,
  1335. };
  1336. struct nfs4_getattr_res res = {
  1337. .fattr = fattr,
  1338. .server = server,
  1339. };
  1340. struct rpc_message msg = {
  1341. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
  1342. .rpc_argp = &args,
  1343. .rpc_resp = &res,
  1344. };
  1345. nfs_fattr_init(fattr);
  1346. return rpc_call_sync(server->client, &msg, 0);
  1347. }
  1348. static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
  1349. {
  1350. struct nfs4_exception exception = { };
  1351. int err;
  1352. do {
  1353. err = nfs4_handle_exception(server,
  1354. _nfs4_proc_getattr(server, fhandle, fattr),
  1355. &exception);
  1356. } while (exception.retry);
  1357. return err;
  1358. }
  1359. /*
  1360. * The file is not closed if it is opened due to the a request to change
  1361. * the size of the file. The open call will not be needed once the
  1362. * VFS layer lookup-intents are implemented.
  1363. *
  1364. * Close is called when the inode is destroyed.
  1365. * If we haven't opened the file for O_WRONLY, we
  1366. * need to in the size_change case to obtain a stateid.
  1367. *
  1368. * Got race?
  1369. * Because OPEN is always done by name in nfsv4, it is
  1370. * possible that we opened a different file by the same
  1371. * name. We can recognize this race condition, but we
  1372. * can't do anything about it besides returning an error.
  1373. *
  1374. * This will be fixed with VFS changes (lookup-intent).
  1375. */
  1376. static int
  1377. nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
  1378. struct iattr *sattr)
  1379. {
  1380. struct rpc_cred *cred;
  1381. struct inode *inode = dentry->d_inode;
  1382. struct nfs_open_context *ctx;
  1383. struct nfs4_state *state = NULL;
  1384. int status;
  1385. nfs_fattr_init(fattr);
  1386. cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
  1387. if (IS_ERR(cred))
  1388. return PTR_ERR(cred);
  1389. /* Search for an existing open(O_WRITE) file */
  1390. ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
  1391. if (ctx != NULL)
  1392. state = ctx->state;
  1393. status = nfs4_do_setattr(inode, fattr, sattr, state);
  1394. if (status == 0)
  1395. nfs_setattr_update_inode(inode, sattr);
  1396. if (ctx != NULL)
  1397. put_nfs_open_context(ctx);
  1398. put_rpccred(cred);
  1399. return status;
  1400. }
  1401. static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
  1402. struct qstr *name, struct nfs_fh *fhandle,
  1403. struct nfs_fattr *fattr)
  1404. {
  1405. int status;
  1406. struct nfs4_lookup_arg args = {
  1407. .bitmask = server->attr_bitmask,
  1408. .dir_fh = dirfh,
  1409. .name = name,
  1410. };
  1411. struct nfs4_lookup_res res = {
  1412. .server = server,
  1413. .fattr = fattr,
  1414. .fh = fhandle,
  1415. };
  1416. struct rpc_message msg = {
  1417. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
  1418. .rpc_argp = &args,
  1419. .rpc_resp = &res,
  1420. };
  1421. nfs_fattr_init(fattr);
  1422. dprintk("NFS call lookupfh %s\n", name->name);
  1423. status = rpc_call_sync(server->client, &msg, 0);
  1424. dprintk("NFS reply lookupfh: %d\n", status);
  1425. if (status == -NFS4ERR_MOVED)
  1426. status = -EREMOTE;
  1427. return status;
  1428. }
  1429. static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
  1430. struct qstr *name, struct nfs_fh *fhandle,
  1431. struct nfs_fattr *fattr)
  1432. {
  1433. struct nfs4_exception exception = { };
  1434. int err;
  1435. do {
  1436. err = nfs4_handle_exception(server,
  1437. _nfs4_proc_lookupfh(server, dirfh, name,
  1438. fhandle, fattr),
  1439. &exception);
  1440. } while (exception.retry);
  1441. return err;
  1442. }
  1443. static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
  1444. struct nfs_fh *fhandle, struct nfs_fattr *fattr)
  1445. {
  1446. int status;
  1447. struct nfs_server *server = NFS_SERVER(dir);
  1448. struct nfs4_lookup_arg args = {
  1449. .bitmask = server->attr_bitmask,
  1450. .dir_fh = NFS_FH(dir),
  1451. .name = name,
  1452. };
  1453. struct nfs4_lookup_res res = {
  1454. .server = server,
  1455. .fattr = fattr,
  1456. .fh = fhandle,
  1457. };
  1458. struct rpc_message msg = {
  1459. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
  1460. .rpc_argp = &args,
  1461. .rpc_resp = &res,
  1462. };
  1463. nfs_fattr_init(fattr);
  1464. dprintk("NFS call lookup %s\n", name->name);
  1465. status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
  1466. if (status == -NFS4ERR_MOVED)
  1467. status = nfs4_get_referral(dir, name, fattr, fhandle);
  1468. dprintk("NFS reply lookup: %d\n", status);
  1469. return status;
  1470. }
  1471. static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
  1472. {
  1473. struct nfs4_exception exception = { };
  1474. int err;
  1475. do {
  1476. err = nfs4_handle_exception(NFS_SERVER(dir),
  1477. _nfs4_proc_lookup(dir, name, fhandle, fattr),
  1478. &exception);
  1479. } while (exception.retry);
  1480. return err;
  1481. }
  1482. static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
  1483. {
  1484. struct nfs4_accessargs args = {
  1485. .fh = NFS_FH(inode),
  1486. };
  1487. struct nfs4_accessres res = { 0 };
  1488. struct rpc_message msg = {
  1489. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
  1490. .rpc_argp = &args,
  1491. .rpc_resp = &res,
  1492. .rpc_cred = entry->cred,
  1493. };
  1494. int mode = entry->mask;
  1495. int status;
  1496. /*
  1497. * Determine which access bits we want to ask for...
  1498. */
  1499. if (mode & MAY_READ)
  1500. args.access |= NFS4_ACCESS_READ;
  1501. if (S_ISDIR(inode->i_mode)) {
  1502. if (mode & MAY_WRITE)
  1503. args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
  1504. if (mode & MAY_EXEC)
  1505. args.access |= NFS4_ACCESS_LOOKUP;
  1506. } else {
  1507. if (mode & MAY_WRITE)
  1508. args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
  1509. if (mode & MAY_EXEC)
  1510. args.access |= NFS4_ACCESS_EXECUTE;
  1511. }
  1512. status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
  1513. if (!status) {
  1514. entry->mask = 0;
  1515. if (res.access & NFS4_ACCESS_READ)
  1516. entry->mask |= MAY_READ;
  1517. if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
  1518. entry->mask |= MAY_WRITE;
  1519. if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
  1520. entry->mask |= MAY_EXEC;
  1521. }
  1522. return status;
  1523. }
  1524. static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
  1525. {
  1526. struct nfs4_exception exception = { };
  1527. int err;
  1528. do {
  1529. err = nfs4_handle_exception(NFS_SERVER(inode),
  1530. _nfs4_proc_access(inode, entry),
  1531. &exception);
  1532. } while (exception.retry);
  1533. return err;
  1534. }
  1535. /*
  1536. * TODO: For the time being, we don't try to get any attributes
  1537. * along with any of the zero-copy operations READ, READDIR,
  1538. * READLINK, WRITE.
  1539. *
  1540. * In the case of the first three, we want to put the GETATTR
  1541. * after the read-type operation -- this is because it is hard
  1542. * to predict the length of a GETATTR response in v4, and thus
  1543. * align the READ data correctly. This means that the GETATTR
  1544. * may end up partially falling into the page cache, and we should
  1545. * shift it into the 'tail' of the xdr_buf before processing.
  1546. * To do this efficiently, we need to know the total length
  1547. * of data received, which doesn't seem to be available outside
  1548. * of the RPC layer.
  1549. *
  1550. * In the case of WRITE, we also want to put the GETATTR after
  1551. * the operation -- in this case because we want to make sure
  1552. * we get the post-operation mtime and size. This means that
  1553. * we can't use xdr_encode_pages() as written: we need a variant
  1554. * of it which would leave room in the 'tail' iovec.
  1555. *
  1556. * Both of these changes to the XDR layer would in fact be quite
  1557. * minor, but I decided to leave them for a subsequent patch.
  1558. */
  1559. static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
  1560. unsigned int pgbase, unsigned int pglen)
  1561. {
  1562. struct nfs4_readlink args = {
  1563. .fh = NFS_FH(inode),
  1564. .pgbase = pgbase,
  1565. .pglen = pglen,
  1566. .pages = &page,
  1567. };
  1568. struct rpc_message msg = {
  1569. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
  1570. .rpc_argp = &args,
  1571. .rpc_resp = NULL,
  1572. };
  1573. return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
  1574. }
  1575. static int nfs4_proc_readlink(struct inode *inode, struct page *page,
  1576. unsigned int pgbase, unsigned int pglen)
  1577. {
  1578. struct nfs4_exception exception = { };
  1579. int err;
  1580. do {
  1581. err = nfs4_handle_exception(NFS_SERVER(inode),
  1582. _nfs4_proc_readlink(inode, page, pgbase, pglen),
  1583. &exception);
  1584. } while (exception.retry);
  1585. return err;
  1586. }
  1587. /*
  1588. * Got race?
  1589. * We will need to arrange for the VFS layer to provide an atomic open.
  1590. * Until then, this create/open method is prone to inefficiency and race
  1591. * conditions due to the lookup, create, and open VFS calls from sys_open()
  1592. * placed on the wire.
  1593. *
  1594. * Given the above sorry state of affairs, I'm simply sending an OPEN.
  1595. * The file will be opened again in the subsequent VFS open call
  1596. * (nfs4_proc_file_open).
  1597. *
  1598. * The open for read will just hang around to be used by any process that
  1599. * opens the file O_RDONLY. This will all be resolved with the VFS changes.
  1600. */
  1601. static int
  1602. nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
  1603. int flags, struct nameidata *nd)
  1604. {
  1605. struct nfs4_state *state;
  1606. struct rpc_cred *cred;
  1607. int status = 0;
  1608. cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
  1609. if (IS_ERR(cred)) {
  1610. status = PTR_ERR(cred);
  1611. goto out;
  1612. }
  1613. state = nfs4_do_open(dir, dentry, flags, sattr, cred);
  1614. put_rpccred(cred);
  1615. if (IS_ERR(state)) {
  1616. status = PTR_ERR(state);
  1617. goto out;
  1618. }
  1619. d_instantiate(dentry, igrab(state->inode));
  1620. if (flags & O_EXCL) {
  1621. struct nfs_fattr fattr;
  1622. status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
  1623. if (status == 0)
  1624. nfs_setattr_update_inode(state->inode, sattr);
  1625. }
  1626. if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
  1627. status = nfs4_intent_set_file(nd, dentry, state);
  1628. else
  1629. nfs4_close_state(state, flags);
  1630. out:
  1631. return status;
  1632. }
  1633. static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
  1634. {
  1635. struct nfs_server *server = NFS_SERVER(dir);
  1636. struct nfs4_remove_arg args = {
  1637. .fh = NFS_FH(dir),
  1638. .name = name,
  1639. .bitmask = server->attr_bitmask,
  1640. };
  1641. struct nfs_fattr dir_attr;
  1642. struct nfs4_remove_res res = {
  1643. .server = server,
  1644. .dir_attr = &dir_attr,
  1645. };
  1646. struct rpc_message msg = {
  1647. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
  1648. .rpc_argp = &args,
  1649. .rpc_resp = &res,
  1650. };
  1651. int status;
  1652. nfs_fattr_init(res.dir_attr);
  1653. status = rpc_call_sync(server->client, &msg, 0);
  1654. if (status == 0) {
  1655. update_changeattr(dir, &res.cinfo);
  1656. nfs_post_op_update_inode(dir, res.dir_attr);
  1657. }
  1658. return status;
  1659. }
  1660. static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
  1661. {
  1662. struct nfs4_exception exception = { };
  1663. int err;
  1664. do {
  1665. err = nfs4_handle_exception(NFS_SERVER(dir),
  1666. _nfs4_proc_remove(dir, name),
  1667. &exception);
  1668. } while (exception.retry);
  1669. return err;
  1670. }
  1671. struct unlink_desc {
  1672. struct nfs4_remove_arg args;
  1673. struct nfs4_remove_res res;
  1674. struct nfs_fattr dir_attr;
  1675. };
  1676. static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
  1677. struct qstr *name)
  1678. {
  1679. struct nfs_server *server = NFS_SERVER(dir->d_inode);
  1680. struct unlink_desc *up;
  1681. up = kmalloc(sizeof(*up), GFP_KERNEL);
  1682. if (!up)
  1683. return -ENOMEM;
  1684. up->args.fh = NFS_FH(dir->d_inode);
  1685. up->args.name = name;
  1686. up->args.bitmask = server->attr_bitmask;
  1687. up->res.server = server;
  1688. up->res.dir_attr = &up->dir_attr;
  1689. msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
  1690. msg->rpc_argp = &up->args;
  1691. msg->rpc_resp = &up->res;
  1692. return 0;
  1693. }
  1694. static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
  1695. {
  1696. struct rpc_message *msg = &task->tk_msg;
  1697. struct unlink_desc *up;
  1698. if (msg->rpc_resp != NULL) {
  1699. up = container_of(msg->rpc_resp, struct unlink_desc, res);
  1700. update_changeattr(dir->d_inode, &up->res.cinfo);
  1701. nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
  1702. kfree(up);
  1703. msg->rpc_resp = NULL;
  1704. msg->rpc_argp = NULL;
  1705. }
  1706. return 0;
  1707. }
  1708. static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
  1709. struct inode *new_dir, struct qstr *new_name)
  1710. {
  1711. struct nfs_server *server = NFS_SERVER(old_dir);
  1712. struct nfs4_rename_arg arg = {
  1713. .old_dir = NFS_FH(old_dir),
  1714. .new_dir = NFS_FH(new_dir),
  1715. .old_name = old_name,
  1716. .new_name = new_name,
  1717. .bitmask = server->attr_bitmask,
  1718. };
  1719. struct nfs_fattr old_fattr, new_fattr;
  1720. struct nfs4_rename_res res = {
  1721. .server = server,
  1722. .old_fattr = &old_fattr,
  1723. .new_fattr = &new_fattr,
  1724. };
  1725. struct rpc_message msg = {
  1726. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
  1727. .rpc_argp = &arg,
  1728. .rpc_resp = &res,
  1729. };
  1730. int status;
  1731. nfs_fattr_init(res.old_fattr);
  1732. nfs_fattr_init(res.new_fattr);
  1733. status = rpc_call_sync(server->client, &msg, 0);
  1734. if (!status) {
  1735. update_changeattr(old_dir, &res.old_cinfo);
  1736. nfs_post_op_update_inode(old_dir, res.old_fattr);
  1737. update_changeattr(new_dir, &res.new_cinfo);
  1738. nfs_post_op_update_inode(new_dir, res.new_fattr);
  1739. }
  1740. return status;
  1741. }
  1742. static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
  1743. struct inode *new_dir, struct qstr *new_name)
  1744. {
  1745. struct nfs4_exception exception = { };
  1746. int err;
  1747. do {
  1748. err = nfs4_handle_exception(NFS_SERVER(old_dir),
  1749. _nfs4_proc_rename(old_dir, old_name,
  1750. new_dir, new_name),
  1751. &exception);
  1752. } while (exception.retry);
  1753. return err;
  1754. }
  1755. static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
  1756. {
  1757. struct nfs_server *server = NFS_SERVER(inode);
  1758. struct nfs4_link_arg arg = {
  1759. .fh = NFS_FH(inode),
  1760. .dir_fh = NFS_FH(dir),
  1761. .name = name,
  1762. .bitmask = server->attr_bitmask,
  1763. };
  1764. struct nfs_fattr fattr, dir_attr;
  1765. struct nfs4_link_res res = {
  1766. .server = server,
  1767. .fattr = &fattr,
  1768. .dir_attr = &dir_attr,
  1769. };
  1770. struct rpc_message msg = {
  1771. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
  1772. .rpc_argp = &arg,
  1773. .rpc_resp = &res,
  1774. };
  1775. int status;
  1776. nfs_fattr_init(res.fattr);
  1777. nfs_fattr_init(res.dir_attr);
  1778. status = rpc_call_sync(server->client, &msg, 0);
  1779. if (!status) {
  1780. update_changeattr(dir, &res.cinfo);
  1781. nfs_post_op_update_inode(dir, res.dir_attr);
  1782. nfs_post_op_update_inode(inode, res.fattr);
  1783. }
  1784. return status;
  1785. }
  1786. static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
  1787. {
  1788. struct nfs4_exception exception = { };
  1789. int err;
  1790. do {
  1791. err = nfs4_handle_exception(NFS_SERVER(inode),
  1792. _nfs4_proc_link(inode, dir, name),
  1793. &exception);
  1794. } while (exception.retry);
  1795. return err;
  1796. }
  1797. static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
  1798. struct page *page, unsigned int len, struct iattr *sattr)
  1799. {
  1800. struct nfs_server *server = NFS_SERVER(dir);
  1801. struct nfs_fh fhandle;
  1802. struct nfs_fattr fattr, dir_fattr;
  1803. struct nfs4_create_arg arg = {
  1804. .dir_fh = NFS_FH(dir),
  1805. .server = server,
  1806. .name = &dentry->d_name,
  1807. .attrs = sattr,
  1808. .ftype = NF4LNK,
  1809. .bitmask = server->attr_bitmask,
  1810. };
  1811. struct nfs4_create_res res = {
  1812. .server = server,
  1813. .fh = &fhandle,
  1814. .fattr = &fattr,
  1815. .dir_fattr = &dir_fattr,
  1816. };
  1817. struct rpc_message msg = {
  1818. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
  1819. .rpc_argp = &arg,
  1820. .rpc_resp = &res,
  1821. };
  1822. int status;
  1823. if (len > NFS4_MAXPATHLEN)
  1824. return -ENAMETOOLONG;
  1825. arg.u.symlink.pages = &page;
  1826. arg.u.symlink.len = len;
  1827. nfs_fattr_init(&fattr);
  1828. nfs_fattr_init(&dir_fattr);
  1829. status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
  1830. if (!status) {
  1831. update_changeattr(dir, &res.dir_cinfo);
  1832. nfs_post_op_update_inode(dir, res.dir_fattr);
  1833. status = nfs_instantiate(dentry, &fhandle, &fattr);
  1834. }
  1835. return status;
  1836. }
  1837. static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
  1838. struct page *page, unsigned int len, struct iattr *sattr)
  1839. {
  1840. struct nfs4_exception exception = { };
  1841. int err;
  1842. do {
  1843. err = nfs4_handle_exception(NFS_SERVER(dir),
  1844. _nfs4_proc_symlink(dir, dentry, page,
  1845. len, sattr),
  1846. &exception);
  1847. } while (exception.retry);
  1848. return err;
  1849. }
  1850. static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
  1851. struct iattr *sattr)
  1852. {
  1853. struct nfs_server *server = NFS_SERVER(dir);
  1854. struct nfs_fh fhandle;
  1855. struct nfs_fattr fattr, dir_fattr;
  1856. struct nfs4_create_arg arg = {
  1857. .dir_fh = NFS_FH(dir),
  1858. .server = server,
  1859. .name = &dentry->d_name,
  1860. .attrs = sattr,
  1861. .ftype = NF4DIR,
  1862. .bitmask = server->attr_bitmask,
  1863. };
  1864. struct nfs4_create_res res = {
  1865. .server = server,
  1866. .fh = &fhandle,
  1867. .fattr = &fattr,
  1868. .dir_fattr = &dir_fattr,
  1869. };
  1870. struct rpc_message msg = {
  1871. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
  1872. .rpc_argp = &arg,
  1873. .rpc_resp = &res,
  1874. };
  1875. int status;
  1876. nfs_fattr_init(&fattr);
  1877. nfs_fattr_init(&dir_fattr);
  1878. status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
  1879. if (!status) {
  1880. update_changeattr(dir, &res.dir_cinfo);
  1881. nfs_post_op_update_inode(dir, res.dir_fattr);
  1882. status = nfs_instantiate(dentry, &fhandle, &fattr);
  1883. }
  1884. return status;
  1885. }
  1886. static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
  1887. struct iattr *sattr)
  1888. {
  1889. struct nfs4_exception exception = { };
  1890. int err;
  1891. do {
  1892. err = nfs4_handle_exception(NFS_SERVER(dir),
  1893. _nfs4_proc_mkdir(dir, dentry, sattr),
  1894. &exception);
  1895. } while (exception.retry);
  1896. return err;
  1897. }
  1898. static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
  1899. u64 cookie, struct page *page, unsigned int count, int plus)
  1900. {
  1901. struct inode *dir = dentry->d_inode;
  1902. struct nfs4_readdir_arg args = {
  1903. .fh = NFS_FH(dir),
  1904. .pages = &page,
  1905. .pgbase = 0,
  1906. .count = count,
  1907. .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
  1908. };
  1909. struct nfs4_readdir_res res;
  1910. struct rpc_message msg = {
  1911. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
  1912. .rpc_argp = &args,
  1913. .rpc_resp = &res,
  1914. .rpc_cred = cred,
  1915. };
  1916. int status;
  1917. dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
  1918. dentry->d_parent->d_name.name,
  1919. dentry->d_name.name,
  1920. (unsigned long long)cookie);
  1921. nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
  1922. res.pgbase = args.pgbase;
  1923. status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
  1924. if (status == 0)
  1925. memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
  1926. dprintk("%s: returns %d\n", __FUNCTION__, status);
  1927. return status;
  1928. }
  1929. static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
  1930. u64 cookie, struct page *page, unsigned int count, int plus)
  1931. {
  1932. struct nfs4_exception exception = { };
  1933. int err;
  1934. do {
  1935. err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
  1936. _nfs4_proc_readdir(dentry, cred, cookie,
  1937. page, count, plus),
  1938. &exception);
  1939. } while (exception.retry);
  1940. return err;
  1941. }
  1942. static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
  1943. struct iattr *sattr, dev_t rdev)
  1944. {
  1945. struct nfs_server *server = NFS_SERVER(dir);
  1946. struct nfs_fh fh;
  1947. struct nfs_fattr fattr, dir_fattr;
  1948. struct nfs4_create_arg arg = {
  1949. .dir_fh = NFS_FH(dir),
  1950. .server = server,
  1951. .name = &dentry->d_name,
  1952. .attrs = sattr,
  1953. .bitmask = server->attr_bitmask,
  1954. };
  1955. struct nfs4_create_res res = {
  1956. .server = server,
  1957. .fh = &fh,
  1958. .fattr = &fattr,
  1959. .dir_fattr = &dir_fattr,
  1960. };
  1961. struct rpc_message msg = {
  1962. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
  1963. .rpc_argp = &arg,
  1964. .rpc_resp = &res,
  1965. };
  1966. int status;
  1967. int mode = sattr->ia_mode;
  1968. nfs_fattr_init(&fattr);
  1969. nfs_fattr_init(&dir_fattr);
  1970. BUG_ON(!(sattr->ia_valid & ATTR_MODE));
  1971. BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
  1972. if (S_ISFIFO(mode))
  1973. arg.ftype = NF4FIFO;
  1974. else if (S_ISBLK(mode)) {
  1975. arg.ftype = NF4BLK;
  1976. arg.u.device.specdata1 = MAJOR(rdev);
  1977. arg.u.device.specdata2 = MINOR(rdev);
  1978. }
  1979. else if (S_ISCHR(mode)) {
  1980. arg.ftype = NF4CHR;
  1981. arg.u.device.specdata1 = MAJOR(rdev);
  1982. arg.u.device.specdata2 = MINOR(rdev);
  1983. }
  1984. else
  1985. arg.ftype = NF4SOCK;
  1986. status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
  1987. if (status == 0) {
  1988. update_changeattr(dir, &res.dir_cinfo);
  1989. nfs_post_op_update_inode(dir, res.dir_fattr);
  1990. status = nfs_instantiate(dentry, &fh, &fattr);
  1991. }
  1992. return status;
  1993. }
  1994. static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
  1995. struct iattr *sattr, dev_t rdev)
  1996. {
  1997. struct nfs4_exception exception = { };
  1998. int err;
  1999. do {
  2000. err = nfs4_handle_exception(NFS_SERVER(dir),
  2001. _nfs4_proc_mknod(dir, dentry, sattr, rdev),
  2002. &exception);
  2003. } while (exception.retry);
  2004. return err;
  2005. }
  2006. static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
  2007. struct nfs_fsstat *fsstat)
  2008. {
  2009. struct nfs4_statfs_arg args = {
  2010. .fh = fhandle,
  2011. .bitmask = server->attr_bitmask,
  2012. };
  2013. struct rpc_message msg = {
  2014. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
  2015. .rpc_argp = &args,
  2016. .rpc_resp = fsstat,
  2017. };
  2018. nfs_fattr_init(fsstat->fattr);
  2019. return rpc_call_sync(server->client, &msg, 0);
  2020. }
  2021. static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
  2022. {
  2023. struct nfs4_exception exception = { };
  2024. int err;
  2025. do {
  2026. err = nfs4_handle_exception(server,
  2027. _nfs4_proc_statfs(server, fhandle, fsstat),
  2028. &exception);
  2029. } while (exception.retry);
  2030. return err;
  2031. }
  2032. static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
  2033. struct nfs_fsinfo *fsinfo)
  2034. {
  2035. struct nfs4_fsinfo_arg args = {
  2036. .fh = fhandle,
  2037. .bitmask = server->attr_bitmask,
  2038. };
  2039. struct rpc_message msg = {
  2040. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
  2041. .rpc_argp = &args,
  2042. .rpc_resp = fsinfo,
  2043. };
  2044. return rpc_call_sync(server->client, &msg, 0);
  2045. }
  2046. static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
  2047. {
  2048. struct nfs4_exception exception = { };
  2049. int err;
  2050. do {
  2051. err = nfs4_handle_exception(server,
  2052. _nfs4_do_fsinfo(server, fhandle, fsinfo),
  2053. &exception);
  2054. } while (exception.retry);
  2055. return err;
  2056. }
  2057. static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
  2058. {
  2059. nfs_fattr_init(fsinfo->fattr);
  2060. return nfs4_do_fsinfo(server, fhandle, fsinfo);
  2061. }
  2062. static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
  2063. struct nfs_pathconf *pathconf)
  2064. {
  2065. struct nfs4_pathconf_arg args = {
  2066. .fh = fhandle,
  2067. .bitmask = server->attr_bitmask,
  2068. };
  2069. struct rpc_message msg = {
  2070. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
  2071. .rpc_argp = &args,
  2072. .rpc_resp = pathconf,
  2073. };
  2074. /* None of the pathconf attributes are mandatory to implement */
  2075. if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
  2076. memset(pathconf, 0, sizeof(*pathconf));
  2077. return 0;
  2078. }
  2079. nfs_fattr_init(pathconf->fattr);
  2080. return rpc_call_sync(server->client, &msg, 0);
  2081. }
  2082. static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
  2083. struct nfs_pathconf *pathconf)
  2084. {
  2085. struct nfs4_exception exception = { };
  2086. int err;
  2087. do {
  2088. err = nfs4_handle_exception(server,
  2089. _nfs4_proc_pathconf(server, fhandle, pathconf),
  2090. &exception);
  2091. } while (exception.retry);
  2092. return err;
  2093. }
  2094. static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
  2095. {
  2096. struct nfs_server *server = NFS_SERVER(data->inode);
  2097. if (nfs4_async_handle_error(task, server) == -EAGAIN) {
  2098. rpc_restart_call(task);
  2099. return -EAGAIN;
  2100. }
  2101. if (task->tk_status > 0)
  2102. renew_lease(server, data->timestamp);
  2103. return 0;
  2104. }
  2105. static void nfs4_proc_read_setup(struct nfs_read_data *data)
  2106. {
  2107. struct rpc_message msg = {
  2108. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
  2109. .rpc_argp = &data->args,
  2110. .rpc_resp = &data->res,
  2111. .rpc_cred = data->cred,
  2112. };
  2113. data->timestamp = jiffies;
  2114. rpc_call_setup(&data->task, &msg, 0);
  2115. }
  2116. static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
  2117. {
  2118. struct inode *inode = data->inode;
  2119. if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
  2120. rpc_restart_call(task);
  2121. return -EAGAIN;
  2122. }
  2123. if (task->tk_status >= 0) {
  2124. renew_lease(NFS_SERVER(inode), data->timestamp);
  2125. nfs_post_op_update_inode(inode, data->res.fattr);
  2126. }
  2127. return 0;
  2128. }
  2129. static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
  2130. {
  2131. struct rpc_message msg = {
  2132. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
  2133. .rpc_argp = &data->args,
  2134. .rpc_resp = &data->res,
  2135. .rpc_cred = data->cred,
  2136. };
  2137. struct inode *inode = data->inode;
  2138. struct nfs_server *server = NFS_SERVER(inode);
  2139. int stable;
  2140. if (how & FLUSH_STABLE) {
  2141. if (!NFS_I(inode)->ncommit)
  2142. stable = NFS_FILE_SYNC;
  2143. else
  2144. stable = NFS_DATA_SYNC;
  2145. } else
  2146. stable = NFS_UNSTABLE;
  2147. data->args.stable = stable;
  2148. data->args.bitmask = server->attr_bitmask;
  2149. data->res.server = server;
  2150. data->timestamp = jiffies;
  2151. /* Finalize the task. */
  2152. rpc_call_setup(&data->task, &msg, 0);
  2153. }
  2154. static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
  2155. {
  2156. struct inode *inode = data->inode;
  2157. if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
  2158. rpc_restart_call(task);
  2159. return -EAGAIN;
  2160. }
  2161. if (task->tk_status >= 0)
  2162. nfs_post_op_update_inode(inode, data->res.fattr);
  2163. return 0;
  2164. }
  2165. static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
  2166. {
  2167. struct rpc_message msg = {
  2168. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
  2169. .rpc_argp = &data->args,
  2170. .rpc_resp = &data->res,
  2171. .rpc_cred = data->cred,
  2172. };
  2173. struct nfs_server *server = NFS_SERVER(data->inode);
  2174. data->args.bitmask = server->attr_bitmask;
  2175. data->res.server = server;
  2176. rpc_call_setup(&data->task, &msg, 0);
  2177. }
  2178. /*
  2179. * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
  2180. * standalone procedure for queueing an asynchronous RENEW.
  2181. */
  2182. static void nfs4_renew_done(struct rpc_task *task, void *data)
  2183. {
  2184. struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
  2185. unsigned long timestamp = (unsigned long)data;
  2186. if (task->tk_status < 0) {
  2187. switch (task->tk_status) {
  2188. case -NFS4ERR_STALE_CLIENTID:
  2189. case -NFS4ERR_EXPIRED:
  2190. case -NFS4ERR_CB_PATH_DOWN:
  2191. nfs4_schedule_state_recovery(clp);
  2192. }
  2193. return;
  2194. }
  2195. spin_lock(&clp->cl_lock);
  2196. if (time_before(clp->cl_last_renewal,timestamp))
  2197. clp->cl_last_renewal = timestamp;
  2198. spin_unlock(&clp->cl_lock);
  2199. }
  2200. static const struct rpc_call_ops nfs4_renew_ops = {
  2201. .rpc_call_done = nfs4_renew_done,
  2202. };
  2203. int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
  2204. {
  2205. struct rpc_message msg = {
  2206. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
  2207. .rpc_argp = clp,
  2208. .rpc_cred = cred,
  2209. };
  2210. return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
  2211. &nfs4_renew_ops, (void *)jiffies);
  2212. }
  2213. int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
  2214. {
  2215. struct rpc_message msg = {
  2216. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
  2217. .rpc_argp = clp,
  2218. .rpc_cred = cred,
  2219. };
  2220. unsigned long now = jiffies;
  2221. int status;
  2222. status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
  2223. if (status < 0)
  2224. return status;
  2225. spin_lock(&clp->cl_lock);
  2226. if (time_before(clp->cl_last_renewal,now))
  2227. clp->cl_last_renewal = now;
  2228. spin_unlock(&clp->cl_lock);
  2229. return 0;
  2230. }
  2231. static inline int nfs4_server_supports_acls(struct nfs_server *server)
  2232. {
  2233. return (server->caps & NFS_CAP_ACLS)
  2234. && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
  2235. && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
  2236. }
  2237. /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
  2238. * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
  2239. * the stack.
  2240. */
  2241. #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
  2242. static void buf_to_pages(const void *buf, size_t buflen,
  2243. struct page **pages, unsigned int *pgbase)
  2244. {
  2245. const void *p = buf;
  2246. *pgbase = offset_in_page(buf);
  2247. p -= *pgbase;
  2248. while (p < buf + buflen) {
  2249. *(pages++) = virt_to_page(p);
  2250. p += PAGE_CACHE_SIZE;
  2251. }
  2252. }
  2253. struct nfs4_cached_acl {
  2254. int cached;
  2255. size_t len;
  2256. char data[0];
  2257. };
  2258. static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
  2259. {
  2260. struct nfs_inode *nfsi = NFS_I(inode);
  2261. spin_lock(&inode->i_lock);
  2262. kfree(nfsi->nfs4_acl);
  2263. nfsi->nfs4_acl = acl;
  2264. spin_unlock(&inode->i_lock);
  2265. }
  2266. static void nfs4_zap_acl_attr(struct inode *inode)
  2267. {
  2268. nfs4_set_cached_acl(inode, NULL);
  2269. }
  2270. static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
  2271. {
  2272. struct nfs_inode *nfsi = NFS_I(inode);
  2273. struct nfs4_cached_acl *acl;
  2274. int ret = -ENOENT;
  2275. spin_lock(&inode->i_lock);
  2276. acl = nfsi->nfs4_acl;
  2277. if (acl == NULL)
  2278. goto out;
  2279. if (buf == NULL) /* user is just asking for length */
  2280. goto out_len;
  2281. if (acl->cached == 0)
  2282. goto out;
  2283. ret = -ERANGE; /* see getxattr(2) man page */
  2284. if (acl->len > buflen)
  2285. goto out;
  2286. memcpy(buf, acl->data, acl->len);
  2287. out_len:
  2288. ret = acl->len;
  2289. out:
  2290. spin_unlock(&inode->i_lock);
  2291. return ret;
  2292. }
  2293. static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
  2294. {
  2295. struct nfs4_cached_acl *acl;
  2296. if (buf && acl_len <= PAGE_SIZE) {
  2297. acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
  2298. if (acl == NULL)
  2299. goto out;
  2300. acl->cached = 1;
  2301. memcpy(acl->data, buf, acl_len);
  2302. } else {
  2303. acl = kmalloc(sizeof(*acl), GFP_KERNEL);
  2304. if (acl == NULL)
  2305. goto out;
  2306. acl->cached = 0;
  2307. }
  2308. acl->len = acl_len;
  2309. out:
  2310. nfs4_set_cached_acl(inode, acl);
  2311. }
  2312. static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
  2313. {
  2314. struct page *pages[NFS4ACL_MAXPAGES];
  2315. struct nfs_getaclargs args = {
  2316. .fh = NFS_FH(inode),
  2317. .acl_pages = pages,
  2318. .acl_len = buflen,
  2319. };
  2320. size_t resp_len = buflen;
  2321. void *resp_buf;
  2322. struct rpc_message msg = {
  2323. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
  2324. .rpc_argp = &args,
  2325. .rpc_resp = &resp_len,
  2326. };
  2327. struct page *localpage = NULL;
  2328. int ret;
  2329. if (buflen < PAGE_SIZE) {
  2330. /* As long as we're doing a round trip to the server anyway,
  2331. * let's be prepared for a page of acl data. */
  2332. localpage = alloc_page(GFP_KERNEL);
  2333. resp_buf = page_address(localpage);
  2334. if (localpage == NULL)
  2335. return -ENOMEM;
  2336. args.acl_pages[0] = localpage;
  2337. args.acl_pgbase = 0;
  2338. resp_len = args.acl_len = PAGE_SIZE;
  2339. } else {
  2340. resp_buf = buf;
  2341. buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
  2342. }
  2343. ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
  2344. if (ret)
  2345. goto out_free;
  2346. if (resp_len > args.acl_len)
  2347. nfs4_write_cached_acl(inode, NULL, resp_len);
  2348. else
  2349. nfs4_write_cached_acl(inode, resp_buf, resp_len);
  2350. if (buf) {
  2351. ret = -ERANGE;
  2352. if (resp_len > buflen)
  2353. goto out_free;
  2354. if (localpage)
  2355. memcpy(buf, resp_buf, resp_len);
  2356. }
  2357. ret = resp_len;
  2358. out_free:
  2359. if (localpage)
  2360. __free_page(localpage);
  2361. return ret;
  2362. }
  2363. static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
  2364. {
  2365. struct nfs4_exception exception = { };
  2366. ssize_t ret;
  2367. do {
  2368. ret = __nfs4_get_acl_uncached(inode, buf, buflen);
  2369. if (ret >= 0)
  2370. break;
  2371. ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
  2372. } while (exception.retry);
  2373. return ret;
  2374. }
  2375. static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
  2376. {
  2377. struct nfs_server *server = NFS_SERVER(inode);
  2378. int ret;
  2379. if (!nfs4_server_supports_acls(server))
  2380. return -EOPNOTSUPP;
  2381. ret = nfs_revalidate_inode(server, inode);
  2382. if (ret < 0)
  2383. return ret;
  2384. ret = nfs4_read_cached_acl(inode, buf, buflen);
  2385. if (ret != -ENOENT)
  2386. return ret;
  2387. return nfs4_get_acl_uncached(inode, buf, buflen);
  2388. }
  2389. static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
  2390. {
  2391. struct nfs_server *server = NFS_SERVER(inode);
  2392. struct page *pages[NFS4ACL_MAXPAGES];
  2393. struct nfs_setaclargs arg = {
  2394. .fh = NFS_FH(inode),
  2395. .acl_pages = pages,
  2396. .acl_len = buflen,
  2397. };
  2398. struct rpc_message msg = {
  2399. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
  2400. .rpc_argp = &arg,
  2401. .rpc_resp = NULL,
  2402. };
  2403. int ret;
  2404. if (!nfs4_server_supports_acls(server))
  2405. return -EOPNOTSUPP;
  2406. nfs_inode_return_delegation(inode);
  2407. buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
  2408. ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
  2409. if (ret == 0)
  2410. nfs4_write_cached_acl(inode, buf, buflen);
  2411. return ret;
  2412. }
  2413. static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
  2414. {
  2415. struct nfs4_exception exception = { };
  2416. int err;
  2417. do {
  2418. err = nfs4_handle_exception(NFS_SERVER(inode),
  2419. __nfs4_proc_set_acl(inode, buf, buflen),
  2420. &exception);
  2421. } while (exception.retry);
  2422. return err;
  2423. }
  2424. static int
  2425. nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
  2426. {
  2427. struct nfs_client *clp = server->nfs_client;
  2428. if (!clp || task->tk_status >= 0)
  2429. return 0;
  2430. switch(task->tk_status) {
  2431. case -NFS4ERR_STALE_CLIENTID:
  2432. case -NFS4ERR_STALE_STATEID:
  2433. case -NFS4ERR_EXPIRED:
  2434. rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
  2435. nfs4_schedule_state_recovery(clp);
  2436. if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
  2437. rpc_wake_up_task(task);
  2438. task->tk_status = 0;
  2439. return -EAGAIN;
  2440. case -NFS4ERR_DELAY:
  2441. nfs_inc_server_stats((struct nfs_server *) server,
  2442. NFSIOS_DELAY);
  2443. case -NFS4ERR_GRACE:
  2444. rpc_delay(task, NFS4_POLL_RETRY_MAX);
  2445. task->tk_status = 0;
  2446. return -EAGAIN;
  2447. case -NFS4ERR_OLD_STATEID:
  2448. task->tk_status = 0;
  2449. return -EAGAIN;
  2450. }
  2451. task->tk_status = nfs4_map_errors(task->tk_status);
  2452. return 0;
  2453. }
  2454. static int nfs4_wait_bit_interruptible(void *word)
  2455. {
  2456. if (signal_pending(current))
  2457. return -ERESTARTSYS;
  2458. schedule();
  2459. return 0;
  2460. }
  2461. static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
  2462. {
  2463. sigset_t oldset;
  2464. int res;
  2465. might_sleep();
  2466. rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
  2467. rpc_clnt_sigmask(clnt, &oldset);
  2468. res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
  2469. nfs4_wait_bit_interruptible,
  2470. TASK_INTERRUPTIBLE);
  2471. rpc_clnt_sigunmask(clnt, &oldset);
  2472. rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
  2473. return res;
  2474. }
  2475. static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
  2476. {
  2477. sigset_t oldset;
  2478. int res = 0;
  2479. might_sleep();
  2480. if (*timeout <= 0)
  2481. *timeout = NFS4_POLL_RETRY_MIN;
  2482. if (*timeout > NFS4_POLL_RETRY_MAX)
  2483. *timeout = NFS4_POLL_RETRY_MAX;
  2484. rpc_clnt_sigmask(clnt, &oldset);
  2485. if (clnt->cl_intr) {
  2486. schedule_timeout_interruptible(*timeout);
  2487. if (signalled())
  2488. res = -ERESTARTSYS;
  2489. } else
  2490. schedule_timeout_uninterruptible(*timeout);
  2491. rpc_clnt_sigunmask(clnt, &oldset);
  2492. *timeout <<= 1;
  2493. return res;
  2494. }
  2495. /* This is the error handling routine for processes that are allowed
  2496. * to sleep.
  2497. */
  2498. int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
  2499. {
  2500. struct nfs_client *clp = server->nfs_client;
  2501. int ret = errorcode;
  2502. exception->retry = 0;
  2503. switch(errorcode) {
  2504. case 0:
  2505. return 0;
  2506. case -NFS4ERR_STALE_CLIENTID:
  2507. case -NFS4ERR_STALE_STATEID:
  2508. case -NFS4ERR_EXPIRED:
  2509. nfs4_schedule_state_recovery(clp);
  2510. ret = nfs4_wait_clnt_recover(server->client, clp);
  2511. if (ret == 0)
  2512. exception->retry = 1;
  2513. break;
  2514. case -NFS4ERR_FILE_OPEN:
  2515. case -NFS4ERR_GRACE:
  2516. case -NFS4ERR_DELAY:
  2517. ret = nfs4_delay(server->client, &exception->timeout);
  2518. if (ret != 0)
  2519. break;
  2520. case -NFS4ERR_OLD_STATEID:
  2521. exception->retry = 1;
  2522. }
  2523. /* We failed to handle the error */
  2524. return nfs4_map_errors(ret);
  2525. }
  2526. int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
  2527. {
  2528. nfs4_verifier sc_verifier;
  2529. struct nfs4_setclientid setclientid = {
  2530. .sc_verifier = &sc_verifier,
  2531. .sc_prog = program,
  2532. };
  2533. struct rpc_message msg = {
  2534. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
  2535. .rpc_argp = &setclientid,
  2536. .rpc_resp = clp,
  2537. .rpc_cred = cred,
  2538. };
  2539. __be32 *p;
  2540. int loop = 0;
  2541. int status;
  2542. p = (__be32*)sc_verifier.data;
  2543. *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
  2544. *p = htonl((u32)clp->cl_boot_time.tv_nsec);
  2545. for(;;) {
  2546. setclientid.sc_name_len = scnprintf(setclientid.sc_name,
  2547. sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
  2548. clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
  2549. cred->cr_ops->cr_name,
  2550. clp->cl_id_uniquifier);
  2551. setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
  2552. sizeof(setclientid.sc_netid), "tcp");
  2553. setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
  2554. sizeof(setclientid.sc_uaddr), "%s.%d.%d",
  2555. clp->cl_ipaddr, port >> 8, port & 255);
  2556. status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
  2557. if (status != -NFS4ERR_CLID_INUSE)
  2558. break;
  2559. if (signalled())
  2560. break;
  2561. if (loop++ & 1)
  2562. ssleep(clp->cl_lease_time + 1);
  2563. else
  2564. if (++clp->cl_id_uniquifier == 0)
  2565. break;
  2566. }
  2567. return status;
  2568. }
  2569. static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
  2570. {
  2571. struct nfs_fsinfo fsinfo;
  2572. struct rpc_message msg = {
  2573. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
  2574. .rpc_argp = clp,
  2575. .rpc_resp = &fsinfo,
  2576. .rpc_cred = cred,
  2577. };
  2578. unsigned long now;
  2579. int status;
  2580. now = jiffies;
  2581. status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
  2582. if (status == 0) {
  2583. spin_lock(&clp->cl_lock);
  2584. clp->cl_lease_time = fsinfo.lease_time * HZ;
  2585. clp->cl_last_renewal = now;
  2586. clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
  2587. spin_unlock(&clp->cl_lock);
  2588. }
  2589. return status;
  2590. }
  2591. int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
  2592. {
  2593. long timeout;
  2594. int err;
  2595. do {
  2596. err = _nfs4_proc_setclientid_confirm(clp, cred);
  2597. switch (err) {
  2598. case 0:
  2599. return err;
  2600. case -NFS4ERR_RESOURCE:
  2601. /* The IBM lawyers misread another document! */
  2602. case -NFS4ERR_DELAY:
  2603. err = nfs4_delay(clp->cl_rpcclient, &timeout);
  2604. }
  2605. } while (err == 0);
  2606. return err;
  2607. }
  2608. struct nfs4_delegreturndata {
  2609. struct nfs4_delegreturnargs args;
  2610. struct nfs4_delegreturnres res;
  2611. struct nfs_fh fh;
  2612. nfs4_stateid stateid;
  2613. struct rpc_cred *cred;
  2614. unsigned long timestamp;
  2615. struct nfs_fattr fattr;
  2616. int rpc_status;
  2617. };
  2618. static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
  2619. {
  2620. struct nfs4_delegreturndata *data = calldata;
  2621. struct rpc_message msg = {
  2622. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
  2623. .rpc_argp = &data->args,
  2624. .rpc_resp = &data->res,
  2625. .rpc_cred = data->cred,
  2626. };
  2627. nfs_fattr_init(data->res.fattr);
  2628. rpc_call_setup(task, &msg, 0);
  2629. }
  2630. static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
  2631. {
  2632. struct nfs4_delegreturndata *data = calldata;
  2633. data->rpc_status = task->tk_status;
  2634. if (data->rpc_status == 0)
  2635. renew_lease(data->res.server, data->timestamp);
  2636. }
  2637. static void nfs4_delegreturn_release(void *calldata)
  2638. {
  2639. struct nfs4_delegreturndata *data = calldata;
  2640. put_rpccred(data->cred);
  2641. kfree(calldata);
  2642. }
  2643. static const struct rpc_call_ops nfs4_delegreturn_ops = {
  2644. .rpc_call_prepare = nfs4_delegreturn_prepare,
  2645. .rpc_call_done = nfs4_delegreturn_done,
  2646. .rpc_release = nfs4_delegreturn_release,
  2647. };
  2648. static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
  2649. {
  2650. struct nfs4_delegreturndata *data;
  2651. struct nfs_server *server = NFS_SERVER(inode);
  2652. struct rpc_task *task;
  2653. int status;
  2654. data = kmalloc(sizeof(*data), GFP_KERNEL);
  2655. if (data == NULL)
  2656. return -ENOMEM;
  2657. data->args.fhandle = &data->fh;
  2658. data->args.stateid = &data->stateid;
  2659. data->args.bitmask = server->attr_bitmask;
  2660. nfs_copy_fh(&data->fh, NFS_FH(inode));
  2661. memcpy(&data->stateid, stateid, sizeof(data->stateid));
  2662. data->res.fattr = &data->fattr;
  2663. data->res.server = server;
  2664. data->cred = get_rpccred(cred);
  2665. data->timestamp = jiffies;
  2666. data->rpc_status = 0;
  2667. task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
  2668. if (IS_ERR(task))
  2669. return PTR_ERR(task);
  2670. status = nfs4_wait_for_completion_rpc_task(task);
  2671. if (status == 0) {
  2672. status = data->rpc_status;
  2673. if (status == 0)
  2674. nfs_post_op_update_inode(inode, &data->fattr);
  2675. }
  2676. rpc_put_task(task);
  2677. return status;
  2678. }
  2679. int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
  2680. {
  2681. struct nfs_server *server = NFS_SERVER(inode);
  2682. struct nfs4_exception exception = { };
  2683. int err;
  2684. do {
  2685. err = _nfs4_proc_delegreturn(inode, cred, stateid);
  2686. switch (err) {
  2687. case -NFS4ERR_STALE_STATEID:
  2688. case -NFS4ERR_EXPIRED:
  2689. case 0:
  2690. return 0;
  2691. }
  2692. err = nfs4_handle_exception(server, err, &exception);
  2693. } while (exception.retry);
  2694. return err;
  2695. }
  2696. #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
  2697. #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
  2698. /*
  2699. * sleep, with exponential backoff, and retry the LOCK operation.
  2700. */
  2701. static unsigned long
  2702. nfs4_set_lock_task_retry(unsigned long timeout)
  2703. {
  2704. schedule_timeout_interruptible(timeout);
  2705. timeout <<= 1;
  2706. if (timeout > NFS4_LOCK_MAXTIMEOUT)
  2707. return NFS4_LOCK_MAXTIMEOUT;
  2708. return timeout;
  2709. }
  2710. static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
  2711. {
  2712. struct inode *inode = state->inode;
  2713. struct nfs_server *server = NFS_SERVER(inode);
  2714. struct nfs_client *clp = server->nfs_client;
  2715. struct nfs_lockt_args arg = {
  2716. .fh = NFS_FH(inode),
  2717. .fl = request,
  2718. };
  2719. struct nfs_lockt_res res = {
  2720. .denied = request,
  2721. };
  2722. struct rpc_message msg = {
  2723. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
  2724. .rpc_argp = &arg,
  2725. .rpc_resp = &res,
  2726. .rpc_cred = state->owner->so_cred,
  2727. };
  2728. struct nfs4_lock_state *lsp;
  2729. int status;
  2730. down_read(&clp->cl_sem);
  2731. arg.lock_owner.clientid = clp->cl_clientid;
  2732. status = nfs4_set_lock_state(state, request);
  2733. if (status != 0)
  2734. goto out;
  2735. lsp = request->fl_u.nfs4_fl.owner;
  2736. arg.lock_owner.id = lsp->ls_id;
  2737. status = rpc_call_sync(server->client, &msg, 0);
  2738. switch (status) {
  2739. case 0:
  2740. request->fl_type = F_UNLCK;
  2741. break;
  2742. case -NFS4ERR_DENIED:
  2743. status = 0;
  2744. }
  2745. out:
  2746. up_read(&clp->cl_sem);
  2747. return status;
  2748. }
  2749. static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
  2750. {
  2751. struct nfs4_exception exception = { };
  2752. int err;
  2753. do {
  2754. err = nfs4_handle_exception(NFS_SERVER(state->inode),
  2755. _nfs4_proc_getlk(state, cmd, request),
  2756. &exception);
  2757. } while (exception.retry);
  2758. return err;
  2759. }
  2760. static int do_vfs_lock(struct file *file, struct file_lock *fl)
  2761. {
  2762. int res = 0;
  2763. switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
  2764. case FL_POSIX:
  2765. res = posix_lock_file_wait(file, fl);
  2766. break;
  2767. case FL_FLOCK:
  2768. res = flock_lock_file_wait(file, fl);
  2769. break;
  2770. default:
  2771. BUG();
  2772. }
  2773. return res;
  2774. }
  2775. struct nfs4_unlockdata {
  2776. struct nfs_locku_args arg;
  2777. struct nfs_locku_res res;
  2778. struct nfs4_lock_state *lsp;
  2779. struct nfs_open_context *ctx;
  2780. struct file_lock fl;
  2781. const struct nfs_server *server;
  2782. unsigned long timestamp;
  2783. };
  2784. static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
  2785. struct nfs_open_context *ctx,
  2786. struct nfs4_lock_state *lsp,
  2787. struct nfs_seqid *seqid)
  2788. {
  2789. struct nfs4_unlockdata *p;
  2790. struct inode *inode = lsp->ls_state->inode;
  2791. p = kmalloc(sizeof(*p), GFP_KERNEL);
  2792. if (p == NULL)
  2793. return NULL;
  2794. p->arg.fh = NFS_FH(inode);
  2795. p->arg.fl = &p->fl;
  2796. p->arg.seqid = seqid;
  2797. p->arg.stateid = &lsp->ls_stateid;
  2798. p->lsp = lsp;
  2799. atomic_inc(&lsp->ls_count);
  2800. /* Ensure we don't close file until we're done freeing locks! */
  2801. p->ctx = get_nfs_open_context(ctx);
  2802. memcpy(&p->fl, fl, sizeof(p->fl));
  2803. p->server = NFS_SERVER(inode);
  2804. return p;
  2805. }
  2806. static void nfs4_locku_release_calldata(void *data)
  2807. {
  2808. struct nfs4_unlockdata *calldata = data;
  2809. nfs_free_seqid(calldata->arg.seqid);
  2810. nfs4_put_lock_state(calldata->lsp);
  2811. put_nfs_open_context(calldata->ctx);
  2812. kfree(calldata);
  2813. }
  2814. static void nfs4_locku_done(struct rpc_task *task, void *data)
  2815. {
  2816. struct nfs4_unlockdata *calldata = data;
  2817. if (RPC_ASSASSINATED(task))
  2818. return;
  2819. nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
  2820. switch (task->tk_status) {
  2821. case 0:
  2822. memcpy(calldata->lsp->ls_stateid.data,
  2823. calldata->res.stateid.data,
  2824. sizeof(calldata->lsp->ls_stateid.data));
  2825. renew_lease(calldata->server, calldata->timestamp);
  2826. break;
  2827. case -NFS4ERR_STALE_STATEID:
  2828. case -NFS4ERR_EXPIRED:
  2829. break;
  2830. default:
  2831. if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
  2832. rpc_restart_call(task);
  2833. }
  2834. }
  2835. static void nfs4_locku_prepare(struct rpc_task *task, void *data)
  2836. {
  2837. struct nfs4_unlockdata *calldata = data;
  2838. struct rpc_message msg = {
  2839. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
  2840. .rpc_argp = &calldata->arg,
  2841. .rpc_resp = &calldata->res,
  2842. .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
  2843. };
  2844. if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
  2845. return;
  2846. if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
  2847. /* Note: exit _without_ running nfs4_locku_done */
  2848. task->tk_action = NULL;
  2849. return;
  2850. }
  2851. calldata->timestamp = jiffies;
  2852. rpc_call_setup(task, &msg, 0);
  2853. }
  2854. static const struct rpc_call_ops nfs4_locku_ops = {
  2855. .rpc_call_prepare = nfs4_locku_prepare,
  2856. .rpc_call_done = nfs4_locku_done,
  2857. .rpc_release = nfs4_locku_release_calldata,
  2858. };
  2859. static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
  2860. struct nfs_open_context *ctx,
  2861. struct nfs4_lock_state *lsp,
  2862. struct nfs_seqid *seqid)
  2863. {
  2864. struct nfs4_unlockdata *data;
  2865. data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
  2866. if (data == NULL) {
  2867. nfs_free_seqid(seqid);
  2868. return ERR_PTR(-ENOMEM);
  2869. }
  2870. return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
  2871. }
  2872. static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
  2873. {
  2874. struct nfs_seqid *seqid;
  2875. struct nfs4_lock_state *lsp;
  2876. struct rpc_task *task;
  2877. int status = 0;
  2878. status = nfs4_set_lock_state(state, request);
  2879. /* Unlock _before_ we do the RPC call */
  2880. request->fl_flags |= FL_EXISTS;
  2881. if (do_vfs_lock(request->fl_file, request) == -ENOENT)
  2882. goto out;
  2883. if (status != 0)
  2884. goto out;
  2885. /* Is this a delegated lock? */
  2886. if (test_bit(NFS_DELEGATED_STATE, &state->flags))
  2887. goto out;
  2888. lsp = request->fl_u.nfs4_fl.owner;
  2889. seqid = nfs_alloc_seqid(&lsp->ls_seqid);
  2890. status = -ENOMEM;
  2891. if (seqid == NULL)
  2892. goto out;
  2893. task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
  2894. status = PTR_ERR(task);
  2895. if (IS_ERR(task))
  2896. goto out;
  2897. status = nfs4_wait_for_completion_rpc_task(task);
  2898. rpc_put_task(task);
  2899. out:
  2900. return status;
  2901. }
  2902. struct nfs4_lockdata {
  2903. struct nfs_lock_args arg;
  2904. struct nfs_lock_res res;
  2905. struct nfs4_lock_state *lsp;
  2906. struct nfs_open_context *ctx;
  2907. struct file_lock fl;
  2908. unsigned long timestamp;
  2909. int rpc_status;
  2910. int cancelled;
  2911. };
  2912. static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
  2913. struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
  2914. {
  2915. struct nfs4_lockdata *p;
  2916. struct inode *inode = lsp->ls_state->inode;
  2917. struct nfs_server *server = NFS_SERVER(inode);
  2918. p = kzalloc(sizeof(*p), GFP_KERNEL);
  2919. if (p == NULL)
  2920. return NULL;
  2921. p->arg.fh = NFS_FH(inode);
  2922. p->arg.fl = &p->fl;
  2923. p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
  2924. if (p->arg.lock_seqid == NULL)
  2925. goto out_free;
  2926. p->arg.lock_stateid = &lsp->ls_stateid;
  2927. p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
  2928. p->arg.lock_owner.id = lsp->ls_id;
  2929. p->lsp = lsp;
  2930. atomic_inc(&lsp->ls_count);
  2931. p->ctx = get_nfs_open_context(ctx);
  2932. memcpy(&p->fl, fl, sizeof(p->fl));
  2933. return p;
  2934. out_free:
  2935. kfree(p);
  2936. return NULL;
  2937. }
  2938. static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
  2939. {
  2940. struct nfs4_lockdata *data = calldata;
  2941. struct nfs4_state *state = data->lsp->ls_state;
  2942. struct nfs4_state_owner *sp = state->owner;
  2943. struct rpc_message msg = {
  2944. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
  2945. .rpc_argp = &data->arg,
  2946. .rpc_resp = &data->res,
  2947. .rpc_cred = sp->so_cred,
  2948. };
  2949. if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
  2950. return;
  2951. dprintk("%s: begin!\n", __FUNCTION__);
  2952. /* Do we need to do an open_to_lock_owner? */
  2953. if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
  2954. data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
  2955. if (data->arg.open_seqid == NULL) {
  2956. data->rpc_status = -ENOMEM;
  2957. task->tk_action = NULL;
  2958. goto out;
  2959. }
  2960. data->arg.open_stateid = &state->stateid;
  2961. data->arg.new_lock_owner = 1;
  2962. }
  2963. data->timestamp = jiffies;
  2964. rpc_call_setup(task, &msg, 0);
  2965. out:
  2966. dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
  2967. }
  2968. static void nfs4_lock_done(struct rpc_task *task, void *calldata)
  2969. {
  2970. struct nfs4_lockdata *data = calldata;
  2971. dprintk("%s: begin!\n", __FUNCTION__);
  2972. data->rpc_status = task->tk_status;
  2973. if (RPC_ASSASSINATED(task))
  2974. goto out;
  2975. if (data->arg.new_lock_owner != 0) {
  2976. nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
  2977. if (data->rpc_status == 0)
  2978. nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
  2979. else
  2980. goto out;
  2981. }
  2982. if (data->rpc_status == 0) {
  2983. memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
  2984. sizeof(data->lsp->ls_stateid.data));
  2985. data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
  2986. renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
  2987. }
  2988. nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
  2989. out:
  2990. dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
  2991. }
  2992. static void nfs4_lock_release(void *calldata)
  2993. {
  2994. struct nfs4_lockdata *data = calldata;
  2995. dprintk("%s: begin!\n", __FUNCTION__);
  2996. if (data->arg.open_seqid != NULL)
  2997. nfs_free_seqid(data->arg.open_seqid);
  2998. if (data->cancelled != 0) {
  2999. struct rpc_task *task;
  3000. task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
  3001. data->arg.lock_seqid);
  3002. if (!IS_ERR(task))
  3003. rpc_put_task(task);
  3004. dprintk("%s: cancelling lock!\n", __FUNCTION__);
  3005. } else
  3006. nfs_free_seqid(data->arg.lock_seqid);
  3007. nfs4_put_lock_state(data->lsp);
  3008. put_nfs_open_context(data->ctx);
  3009. kfree(data);
  3010. dprintk("%s: done!\n", __FUNCTION__);
  3011. }
  3012. static const struct rpc_call_ops nfs4_lock_ops = {
  3013. .rpc_call_prepare = nfs4_lock_prepare,
  3014. .rpc_call_done = nfs4_lock_done,
  3015. .rpc_release = nfs4_lock_release,
  3016. };
  3017. static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
  3018. {
  3019. struct nfs4_lockdata *data;
  3020. struct rpc_task *task;
  3021. int ret;
  3022. dprintk("%s: begin!\n", __FUNCTION__);
  3023. data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
  3024. fl->fl_u.nfs4_fl.owner);
  3025. if (data == NULL)
  3026. return -ENOMEM;
  3027. if (IS_SETLKW(cmd))
  3028. data->arg.block = 1;
  3029. if (reclaim != 0)
  3030. data->arg.reclaim = 1;
  3031. task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
  3032. &nfs4_lock_ops, data);
  3033. if (IS_ERR(task))
  3034. return PTR_ERR(task);
  3035. ret = nfs4_wait_for_completion_rpc_task(task);
  3036. if (ret == 0) {
  3037. ret = data->rpc_status;
  3038. if (ret == -NFS4ERR_DENIED)
  3039. ret = -EAGAIN;
  3040. } else
  3041. data->cancelled = 1;
  3042. rpc_put_task(task);
  3043. dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
  3044. return ret;
  3045. }
  3046. static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
  3047. {
  3048. struct nfs_server *server = NFS_SERVER(state->inode);
  3049. struct nfs4_exception exception = { };
  3050. int err;
  3051. do {
  3052. /* Cache the lock if possible... */
  3053. if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
  3054. return 0;
  3055. err = _nfs4_do_setlk(state, F_SETLK, request, 1);
  3056. if (err != -NFS4ERR_DELAY)
  3057. break;
  3058. nfs4_handle_exception(server, err, &exception);
  3059. } while (exception.retry);
  3060. return err;
  3061. }
  3062. static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
  3063. {
  3064. struct nfs_server *server = NFS_SERVER(state->inode);
  3065. struct nfs4_exception exception = { };
  3066. int err;
  3067. err = nfs4_set_lock_state(state, request);
  3068. if (err != 0)
  3069. return err;
  3070. do {
  3071. if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
  3072. return 0;
  3073. err = _nfs4_do_setlk(state, F_SETLK, request, 0);
  3074. if (err != -NFS4ERR_DELAY)
  3075. break;
  3076. nfs4_handle_exception(server, err, &exception);
  3077. } while (exception.retry);
  3078. return err;
  3079. }
  3080. static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
  3081. {
  3082. struct nfs_client *clp = state->owner->so_client;
  3083. unsigned char fl_flags = request->fl_flags;
  3084. int status;
  3085. /* Is this a delegated open? */
  3086. status = nfs4_set_lock_state(state, request);
  3087. if (status != 0)
  3088. goto out;
  3089. request->fl_flags |= FL_ACCESS;
  3090. status = do_vfs_lock(request->fl_file, request);
  3091. if (status < 0)
  3092. goto out;
  3093. down_read(&clp->cl_sem);
  3094. if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
  3095. struct nfs_inode *nfsi = NFS_I(state->inode);
  3096. /* Yes: cache locks! */
  3097. down_read(&nfsi->rwsem);
  3098. /* ...but avoid races with delegation recall... */
  3099. if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
  3100. request->fl_flags = fl_flags & ~FL_SLEEP;
  3101. status = do_vfs_lock(request->fl_file, request);
  3102. up_read(&nfsi->rwsem);
  3103. goto out_unlock;
  3104. }
  3105. up_read(&nfsi->rwsem);
  3106. }
  3107. status = _nfs4_do_setlk(state, cmd, request, 0);
  3108. if (status != 0)
  3109. goto out_unlock;
  3110. /* Note: we always want to sleep here! */
  3111. request->fl_flags = fl_flags | FL_SLEEP;
  3112. if (do_vfs_lock(request->fl_file, request) < 0)
  3113. printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
  3114. out_unlock:
  3115. up_read(&clp->cl_sem);
  3116. out:
  3117. request->fl_flags = fl_flags;
  3118. return status;
  3119. }
  3120. static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
  3121. {
  3122. struct nfs4_exception exception = { };
  3123. int err;
  3124. do {
  3125. err = nfs4_handle_exception(NFS_SERVER(state->inode),
  3126. _nfs4_proc_setlk(state, cmd, request),
  3127. &exception);
  3128. } while (exception.retry);
  3129. return err;
  3130. }
  3131. static int
  3132. nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
  3133. {
  3134. struct nfs_open_context *ctx;
  3135. struct nfs4_state *state;
  3136. unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
  3137. int status;
  3138. /* verify open state */
  3139. ctx = (struct nfs_open_context *)filp->private_data;
  3140. state = ctx->state;
  3141. if (request->fl_start < 0 || request->fl_end < 0)
  3142. return -EINVAL;
  3143. if (IS_GETLK(cmd))
  3144. return nfs4_proc_getlk(state, F_GETLK, request);
  3145. if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
  3146. return -EINVAL;
  3147. if (request->fl_type == F_UNLCK)
  3148. return nfs4_proc_unlck(state, cmd, request);
  3149. do {
  3150. status = nfs4_proc_setlk(state, cmd, request);
  3151. if ((status != -EAGAIN) || IS_SETLK(cmd))
  3152. break;
  3153. timeout = nfs4_set_lock_task_retry(timeout);
  3154. status = -ERESTARTSYS;
  3155. if (signalled())
  3156. break;
  3157. } while(status < 0);
  3158. return status;
  3159. }
  3160. int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
  3161. {
  3162. struct nfs_server *server = NFS_SERVER(state->inode);
  3163. struct nfs4_exception exception = { };
  3164. int err;
  3165. err = nfs4_set_lock_state(state, fl);
  3166. if (err != 0)
  3167. goto out;
  3168. do {
  3169. err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
  3170. if (err != -NFS4ERR_DELAY)
  3171. break;
  3172. err = nfs4_handle_exception(server, err, &exception);
  3173. } while (exception.retry);
  3174. out:
  3175. return err;
  3176. }
  3177. #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
  3178. int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
  3179. size_t buflen, int flags)
  3180. {
  3181. struct inode *inode = dentry->d_inode;
  3182. if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
  3183. return -EOPNOTSUPP;
  3184. if (!S_ISREG(inode->i_mode) &&
  3185. (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
  3186. return -EPERM;
  3187. return nfs4_proc_set_acl(inode, buf, buflen);
  3188. }
  3189. /* The getxattr man page suggests returning -ENODATA for unknown attributes,
  3190. * and that's what we'll do for e.g. user attributes that haven't been set.
  3191. * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
  3192. * attributes in kernel-managed attribute namespaces. */
  3193. ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
  3194. size_t buflen)
  3195. {
  3196. struct inode *inode = dentry->d_inode;
  3197. if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
  3198. return -EOPNOTSUPP;
  3199. return nfs4_proc_get_acl(inode, buf, buflen);
  3200. }
  3201. ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
  3202. {
  3203. size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
  3204. if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
  3205. return 0;
  3206. if (buf && buflen < len)
  3207. return -ERANGE;
  3208. if (buf)
  3209. memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
  3210. return len;
  3211. }
  3212. int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
  3213. struct nfs4_fs_locations *fs_locations, struct page *page)
  3214. {
  3215. struct nfs_server *server = NFS_SERVER(dir);
  3216. u32 bitmask[2] = {
  3217. [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
  3218. [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
  3219. };
  3220. struct nfs4_fs_locations_arg args = {
  3221. .dir_fh = NFS_FH(dir),
  3222. .name = name,
  3223. .page = page,
  3224. .bitmask = bitmask,
  3225. };
  3226. struct rpc_message msg = {
  3227. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
  3228. .rpc_argp = &args,
  3229. .rpc_resp = fs_locations,
  3230. };
  3231. int status;
  3232. dprintk("%s: start\n", __FUNCTION__);
  3233. nfs_fattr_init(&fs_locations->fattr);
  3234. fs_locations->server = server;
  3235. fs_locations->nlocations = 0;
  3236. status = rpc_call_sync(server->client, &msg, 0);
  3237. dprintk("%s: returned status = %d\n", __FUNCTION__, status);
  3238. return status;
  3239. }
  3240. struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
  3241. .recover_open = nfs4_open_reclaim,
  3242. .recover_lock = nfs4_lock_reclaim,
  3243. };
  3244. struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
  3245. .recover_open = nfs4_open_expired,
  3246. .recover_lock = nfs4_lock_expired,
  3247. };
  3248. static const struct inode_operations nfs4_file_inode_operations = {
  3249. .permission = nfs_permission,
  3250. .getattr = nfs_getattr,
  3251. .setattr = nfs_setattr,
  3252. .getxattr = nfs4_getxattr,
  3253. .setxattr = nfs4_setxattr,
  3254. .listxattr = nfs4_listxattr,
  3255. };
  3256. const struct nfs_rpc_ops nfs_v4_clientops = {
  3257. .version = 4, /* protocol version */
  3258. .dentry_ops = &nfs4_dentry_operations,
  3259. .dir_inode_ops = &nfs4_dir_inode_operations,
  3260. .file_inode_ops = &nfs4_file_inode_operations,
  3261. .getroot = nfs4_proc_get_root,
  3262. .getattr = nfs4_proc_getattr,
  3263. .setattr = nfs4_proc_setattr,
  3264. .lookupfh = nfs4_proc_lookupfh,
  3265. .lookup = nfs4_proc_lookup,
  3266. .access = nfs4_proc_access,
  3267. .readlink = nfs4_proc_readlink,
  3268. .create = nfs4_proc_create,
  3269. .remove = nfs4_proc_remove,
  3270. .unlink_setup = nfs4_proc_unlink_setup,
  3271. .unlink_done = nfs4_proc_unlink_done,
  3272. .rename = nfs4_proc_rename,
  3273. .link = nfs4_proc_link,
  3274. .symlink = nfs4_proc_symlink,
  3275. .mkdir = nfs4_proc_mkdir,
  3276. .rmdir = nfs4_proc_remove,
  3277. .readdir = nfs4_proc_readdir,
  3278. .mknod = nfs4_proc_mknod,
  3279. .statfs = nfs4_proc_statfs,
  3280. .fsinfo = nfs4_proc_fsinfo,
  3281. .pathconf = nfs4_proc_pathconf,
  3282. .set_capabilities = nfs4_server_capabilities,
  3283. .decode_dirent = nfs4_decode_dirent,
  3284. .read_setup = nfs4_proc_read_setup,
  3285. .read_done = nfs4_read_done,
  3286. .write_setup = nfs4_proc_write_setup,
  3287. .write_done = nfs4_write_done,
  3288. .commit_setup = nfs4_proc_commit_setup,
  3289. .commit_done = nfs4_commit_done,
  3290. .file_open = nfs_open,
  3291. .file_release = nfs_release,
  3292. .lock = nfs4_proc_lock,
  3293. .clear_acl_cache = nfs4_zap_acl_attr,
  3294. };
  3295. /*
  3296. * Local variables:
  3297. * c-basic-offset: 8
  3298. * End:
  3299. */