nfs42proc.c 35 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
  4. */
  5. #include <linux/fs.h>
  6. #include <linux/sunrpc/addr.h>
  7. #include <linux/sunrpc/sched.h>
  8. #include <linux/nfs.h>
  9. #include <linux/nfs3.h>
  10. #include <linux/nfs4.h>
  11. #include <linux/nfs_xdr.h>
  12. #include <linux/nfs_fs.h>
  13. #include "nfs4_fs.h"
  14. #include "nfs42.h"
  15. #include "iostat.h"
  16. #include "pnfs.h"
  17. #include "nfs4session.h"
  18. #include "internal.h"
  19. #include "delegation.h"
  20. #include "nfs4trace.h"
  21. #define NFSDBG_FACILITY NFSDBG_PROC
  22. static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
  23. static void nfs42_set_netaddr(struct file *filep, struct nfs42_netaddr *naddr)
  24. {
  25. struct nfs_client *clp = (NFS_SERVER(file_inode(filep)))->nfs_client;
  26. unsigned short port = 2049;
  27. rcu_read_lock();
  28. naddr->netid_len = scnprintf(naddr->netid,
  29. sizeof(naddr->netid), "%s",
  30. rpc_peeraddr2str(clp->cl_rpcclient,
  31. RPC_DISPLAY_NETID));
  32. naddr->addr_len = scnprintf(naddr->addr,
  33. sizeof(naddr->addr),
  34. "%s.%u.%u",
  35. rpc_peeraddr2str(clp->cl_rpcclient,
  36. RPC_DISPLAY_ADDR),
  37. port >> 8, port & 255);
  38. rcu_read_unlock();
  39. }
  40. static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
  41. struct nfs_lock_context *lock, loff_t offset, loff_t len)
  42. {
  43. struct inode *inode = file_inode(filep);
  44. struct nfs_server *server = NFS_SERVER(inode);
  45. u32 bitmask[3];
  46. struct nfs42_falloc_args args = {
  47. .falloc_fh = NFS_FH(inode),
  48. .falloc_offset = offset,
  49. .falloc_length = len,
  50. .falloc_bitmask = bitmask,
  51. };
  52. struct nfs42_falloc_res res = {
  53. .falloc_server = server,
  54. };
  55. int status;
  56. msg->rpc_argp = &args;
  57. msg->rpc_resp = &res;
  58. status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
  59. lock, FMODE_WRITE);
  60. if (status) {
  61. if (status == -EAGAIN)
  62. status = -NFS4ERR_BAD_STATEID;
  63. return status;
  64. }
  65. memcpy(bitmask, server->cache_consistency_bitmask, sizeof(bitmask));
  66. if (server->attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)
  67. bitmask[1] |= FATTR4_WORD1_SPACE_USED;
  68. res.falloc_fattr = nfs_alloc_fattr();
  69. if (!res.falloc_fattr)
  70. return -ENOMEM;
  71. status = nfs4_call_sync(server->client, server, msg,
  72. &args.seq_args, &res.seq_res, 0);
  73. if (status == 0)
  74. status = nfs_post_op_update_inode_force_wcc(inode,
  75. res.falloc_fattr);
  76. kfree(res.falloc_fattr);
  77. return status;
  78. }
  79. static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
  80. loff_t offset, loff_t len)
  81. {
  82. struct inode *inode = file_inode(filep);
  83. struct nfs_server *server = NFS_SERVER(inode);
  84. struct nfs4_exception exception = { };
  85. struct nfs_lock_context *lock;
  86. int err;
  87. lock = nfs_get_lock_context(nfs_file_open_context(filep));
  88. if (IS_ERR(lock))
  89. return PTR_ERR(lock);
  90. exception.inode = inode;
  91. exception.state = lock->open_context->state;
  92. err = nfs_sync_inode(inode);
  93. if (err)
  94. goto out;
  95. do {
  96. err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
  97. if (err == -ENOTSUPP) {
  98. err = -EOPNOTSUPP;
  99. break;
  100. }
  101. err = nfs4_handle_exception(server, err, &exception);
  102. } while (exception.retry);
  103. out:
  104. nfs_put_lock_context(lock);
  105. return err;
  106. }
  107. int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
  108. {
  109. struct rpc_message msg = {
  110. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
  111. };
  112. struct inode *inode = file_inode(filep);
  113. int err;
  114. if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
  115. return -EOPNOTSUPP;
  116. inode_lock(inode);
  117. err = nfs42_proc_fallocate(&msg, filep, offset, len);
  118. if (err == -EOPNOTSUPP)
  119. NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
  120. inode_unlock(inode);
  121. return err;
  122. }
  123. int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
  124. {
  125. struct rpc_message msg = {
  126. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
  127. };
  128. struct inode *inode = file_inode(filep);
  129. int err;
  130. if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
  131. return -EOPNOTSUPP;
  132. inode_lock(inode);
  133. err = nfs42_proc_fallocate(&msg, filep, offset, len);
  134. if (err == 0)
  135. truncate_pagecache_range(inode, offset, (offset + len) -1);
  136. if (err == -EOPNOTSUPP)
  137. NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
  138. inode_unlock(inode);
  139. return err;
  140. }
  141. static int handle_async_copy(struct nfs42_copy_res *res,
  142. struct nfs_server *dst_server,
  143. struct nfs_server *src_server,
  144. struct file *src,
  145. struct file *dst,
  146. nfs4_stateid *src_stateid,
  147. bool *restart)
  148. {
  149. struct nfs4_copy_state *copy, *tmp_copy;
  150. int status = NFS4_OK;
  151. bool found_pending = false;
  152. struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
  153. struct nfs_open_context *src_ctx = nfs_file_open_context(src);
  154. copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
  155. if (!copy)
  156. return -ENOMEM;
  157. spin_lock(&dst_server->nfs_client->cl_lock);
  158. list_for_each_entry(tmp_copy,
  159. &dst_server->nfs_client->pending_cb_stateids,
  160. copies) {
  161. if (memcmp(&res->write_res.stateid, &tmp_copy->stateid,
  162. NFS4_STATEID_SIZE))
  163. continue;
  164. found_pending = true;
  165. list_del(&tmp_copy->copies);
  166. break;
  167. }
  168. if (found_pending) {
  169. spin_unlock(&dst_server->nfs_client->cl_lock);
  170. kfree(copy);
  171. copy = tmp_copy;
  172. goto out;
  173. }
  174. memcpy(&copy->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE);
  175. init_completion(&copy->completion);
  176. copy->parent_dst_state = dst_ctx->state;
  177. copy->parent_src_state = src_ctx->state;
  178. list_add_tail(&copy->copies, &dst_server->ss_copies);
  179. spin_unlock(&dst_server->nfs_client->cl_lock);
  180. if (dst_server != src_server) {
  181. spin_lock(&src_server->nfs_client->cl_lock);
  182. list_add_tail(&copy->src_copies, &src_server->ss_copies);
  183. spin_unlock(&src_server->nfs_client->cl_lock);
  184. }
  185. status = wait_for_completion_interruptible(&copy->completion);
  186. spin_lock(&dst_server->nfs_client->cl_lock);
  187. list_del_init(&copy->copies);
  188. spin_unlock(&dst_server->nfs_client->cl_lock);
  189. if (dst_server != src_server) {
  190. spin_lock(&src_server->nfs_client->cl_lock);
  191. list_del_init(&copy->src_copies);
  192. spin_unlock(&src_server->nfs_client->cl_lock);
  193. }
  194. if (status == -ERESTARTSYS) {
  195. goto out_cancel;
  196. } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
  197. status = -EAGAIN;
  198. *restart = true;
  199. goto out_cancel;
  200. }
  201. out:
  202. res->write_res.count = copy->count;
  203. memcpy(&res->write_res.verifier, &copy->verf, sizeof(copy->verf));
  204. status = -copy->error;
  205. out_free:
  206. kfree(copy);
  207. return status;
  208. out_cancel:
  209. nfs42_do_offload_cancel_async(dst, &copy->stateid);
  210. if (!nfs42_files_from_same_server(src, dst))
  211. nfs42_do_offload_cancel_async(src, src_stateid);
  212. goto out_free;
  213. }
  214. static int process_copy_commit(struct file *dst, loff_t pos_dst,
  215. struct nfs42_copy_res *res)
  216. {
  217. struct nfs_commitres cres;
  218. int status = -ENOMEM;
  219. cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
  220. if (!cres.verf)
  221. goto out;
  222. status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres);
  223. if (status)
  224. goto out_free;
  225. if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
  226. &cres.verf->verifier)) {
  227. dprintk("commit verf differs from copy verf\n");
  228. status = -EAGAIN;
  229. }
  230. out_free:
  231. kfree(cres.verf);
  232. out:
  233. return status;
  234. }
  235. static ssize_t _nfs42_proc_copy(struct file *src,
  236. struct nfs_lock_context *src_lock,
  237. struct file *dst,
  238. struct nfs_lock_context *dst_lock,
  239. struct nfs42_copy_args *args,
  240. struct nfs42_copy_res *res,
  241. struct nl4_server *nss,
  242. nfs4_stateid *cnr_stateid,
  243. bool *restart)
  244. {
  245. struct rpc_message msg = {
  246. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
  247. .rpc_argp = args,
  248. .rpc_resp = res,
  249. };
  250. struct inode *dst_inode = file_inode(dst);
  251. struct inode *src_inode = file_inode(src);
  252. struct nfs_server *dst_server = NFS_SERVER(dst_inode);
  253. struct nfs_server *src_server = NFS_SERVER(src_inode);
  254. loff_t pos_src = args->src_pos;
  255. loff_t pos_dst = args->dst_pos;
  256. size_t count = args->count;
  257. ssize_t status;
  258. if (nss) {
  259. args->cp_src = nss;
  260. nfs4_stateid_copy(&args->src_stateid, cnr_stateid);
  261. } else {
  262. status = nfs4_set_rw_stateid(&args->src_stateid,
  263. src_lock->open_context, src_lock, FMODE_READ);
  264. if (status) {
  265. if (status == -EAGAIN)
  266. status = -NFS4ERR_BAD_STATEID;
  267. return status;
  268. }
  269. }
  270. status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
  271. pos_src, pos_src + (loff_t)count - 1);
  272. if (status)
  273. return status;
  274. status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
  275. dst_lock, FMODE_WRITE);
  276. if (status) {
  277. if (status == -EAGAIN)
  278. status = -NFS4ERR_BAD_STATEID;
  279. return status;
  280. }
  281. status = nfs_sync_inode(dst_inode);
  282. if (status)
  283. return status;
  284. res->commit_res.verf = NULL;
  285. if (args->sync) {
  286. res->commit_res.verf =
  287. kzalloc(sizeof(struct nfs_writeverf), GFP_NOFS);
  288. if (!res->commit_res.verf)
  289. return -ENOMEM;
  290. }
  291. set_bit(NFS_CLNT_SRC_SSC_COPY_STATE,
  292. &src_lock->open_context->state->flags);
  293. set_bit(NFS_CLNT_DST_SSC_COPY_STATE,
  294. &dst_lock->open_context->state->flags);
  295. status = nfs4_call_sync(dst_server->client, dst_server, &msg,
  296. &args->seq_args, &res->seq_res, 0);
  297. if (status == -ENOTSUPP)
  298. dst_server->caps &= ~NFS_CAP_COPY;
  299. if (status)
  300. goto out;
  301. if (args->sync &&
  302. nfs_write_verifier_cmp(&res->write_res.verifier.verifier,
  303. &res->commit_res.verf->verifier)) {
  304. status = -EAGAIN;
  305. goto out;
  306. }
  307. if (!res->synchronous) {
  308. status = handle_async_copy(res, dst_server, src_server, src,
  309. dst, &args->src_stateid, restart);
  310. if (status)
  311. goto out;
  312. }
  313. if ((!res->synchronous || !args->sync) &&
  314. res->write_res.verifier.committed != NFS_FILE_SYNC) {
  315. status = process_copy_commit(dst, pos_dst, res);
  316. if (status)
  317. goto out;
  318. }
  319. WARN_ON_ONCE(invalidate_inode_pages2_range(dst_inode->i_mapping,
  320. pos_dst >> PAGE_SHIFT,
  321. (pos_dst + res->write_res.count - 1) >> PAGE_SHIFT));
  322. spin_lock(&dst_inode->i_lock);
  323. NFS_I(dst_inode)->cache_validity |= (NFS_INO_REVAL_PAGECACHE |
  324. NFS_INO_REVAL_FORCED | NFS_INO_INVALID_SIZE |
  325. NFS_INO_INVALID_ATTR | NFS_INO_INVALID_DATA);
  326. spin_unlock(&dst_inode->i_lock);
  327. spin_lock(&src_inode->i_lock);
  328. NFS_I(src_inode)->cache_validity |= (NFS_INO_REVAL_PAGECACHE |
  329. NFS_INO_REVAL_FORCED | NFS_INO_INVALID_ATIME);
  330. spin_unlock(&src_inode->i_lock);
  331. status = res->write_res.count;
  332. out:
  333. if (args->sync)
  334. kfree(res->commit_res.verf);
  335. return status;
  336. }
  337. ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
  338. struct file *dst, loff_t pos_dst, size_t count,
  339. struct nl4_server *nss,
  340. nfs4_stateid *cnr_stateid, bool sync)
  341. {
  342. struct nfs_server *server = NFS_SERVER(file_inode(dst));
  343. struct nfs_lock_context *src_lock;
  344. struct nfs_lock_context *dst_lock;
  345. struct nfs42_copy_args args = {
  346. .src_fh = NFS_FH(file_inode(src)),
  347. .src_pos = pos_src,
  348. .dst_fh = NFS_FH(file_inode(dst)),
  349. .dst_pos = pos_dst,
  350. .count = count,
  351. .sync = sync,
  352. };
  353. struct nfs42_copy_res res;
  354. struct nfs4_exception src_exception = {
  355. .inode = file_inode(src),
  356. .stateid = &args.src_stateid,
  357. };
  358. struct nfs4_exception dst_exception = {
  359. .inode = file_inode(dst),
  360. .stateid = &args.dst_stateid,
  361. };
  362. ssize_t err, err2;
  363. bool restart = false;
  364. src_lock = nfs_get_lock_context(nfs_file_open_context(src));
  365. if (IS_ERR(src_lock))
  366. return PTR_ERR(src_lock);
  367. src_exception.state = src_lock->open_context->state;
  368. dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
  369. if (IS_ERR(dst_lock)) {
  370. err = PTR_ERR(dst_lock);
  371. goto out_put_src_lock;
  372. }
  373. dst_exception.state = dst_lock->open_context->state;
  374. do {
  375. inode_lock(file_inode(dst));
  376. err = _nfs42_proc_copy(src, src_lock,
  377. dst, dst_lock,
  378. &args, &res,
  379. nss, cnr_stateid, &restart);
  380. inode_unlock(file_inode(dst));
  381. if (err >= 0)
  382. break;
  383. if (err == -ENOTSUPP &&
  384. nfs42_files_from_same_server(src, dst)) {
  385. err = -EOPNOTSUPP;
  386. break;
  387. } else if (err == -EAGAIN) {
  388. if (!restart) {
  389. dst_exception.retry = 1;
  390. continue;
  391. }
  392. break;
  393. } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
  394. args.sync = true;
  395. dst_exception.retry = 1;
  396. continue;
  397. } else if ((err == -ESTALE ||
  398. err == -NFS4ERR_OFFLOAD_DENIED ||
  399. err == -ENOTSUPP) &&
  400. !nfs42_files_from_same_server(src, dst)) {
  401. nfs42_do_offload_cancel_async(src, &args.src_stateid);
  402. err = -EOPNOTSUPP;
  403. break;
  404. }
  405. err2 = nfs4_handle_exception(server, err, &src_exception);
  406. err = nfs4_handle_exception(server, err, &dst_exception);
  407. if (!err)
  408. err = err2;
  409. } while (src_exception.retry || dst_exception.retry);
  410. nfs_put_lock_context(dst_lock);
  411. out_put_src_lock:
  412. nfs_put_lock_context(src_lock);
  413. return err;
  414. }
  415. struct nfs42_offloadcancel_data {
  416. struct nfs_server *seq_server;
  417. struct nfs42_offload_status_args args;
  418. struct nfs42_offload_status_res res;
  419. };
  420. static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata)
  421. {
  422. struct nfs42_offloadcancel_data *data = calldata;
  423. nfs4_setup_sequence(data->seq_server->nfs_client,
  424. &data->args.osa_seq_args,
  425. &data->res.osr_seq_res, task);
  426. }
  427. static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata)
  428. {
  429. struct nfs42_offloadcancel_data *data = calldata;
  430. nfs41_sequence_done(task, &data->res.osr_seq_res);
  431. if (task->tk_status &&
  432. nfs4_async_handle_error(task, data->seq_server, NULL,
  433. NULL) == -EAGAIN)
  434. rpc_restart_call_prepare(task);
  435. }
  436. static void nfs42_free_offloadcancel_data(void *data)
  437. {
  438. kfree(data);
  439. }
  440. static const struct rpc_call_ops nfs42_offload_cancel_ops = {
  441. .rpc_call_prepare = nfs42_offload_cancel_prepare,
  442. .rpc_call_done = nfs42_offload_cancel_done,
  443. .rpc_release = nfs42_free_offloadcancel_data,
  444. };
  445. static int nfs42_do_offload_cancel_async(struct file *dst,
  446. nfs4_stateid *stateid)
  447. {
  448. struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
  449. struct nfs42_offloadcancel_data *data = NULL;
  450. struct nfs_open_context *ctx = nfs_file_open_context(dst);
  451. struct rpc_task *task;
  452. struct rpc_message msg = {
  453. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL],
  454. .rpc_cred = ctx->cred,
  455. };
  456. struct rpc_task_setup task_setup_data = {
  457. .rpc_client = dst_server->client,
  458. .rpc_message = &msg,
  459. .callback_ops = &nfs42_offload_cancel_ops,
  460. .workqueue = nfsiod_workqueue,
  461. .flags = RPC_TASK_ASYNC,
  462. };
  463. int status;
  464. if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL))
  465. return -EOPNOTSUPP;
  466. data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_NOFS);
  467. if (data == NULL)
  468. return -ENOMEM;
  469. data->seq_server = dst_server;
  470. data->args.osa_src_fh = NFS_FH(file_inode(dst));
  471. memcpy(&data->args.osa_stateid, stateid,
  472. sizeof(data->args.osa_stateid));
  473. msg.rpc_argp = &data->args;
  474. msg.rpc_resp = &data->res;
  475. task_setup_data.callback_data = data;
  476. nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res,
  477. 1, 0);
  478. task = rpc_run_task(&task_setup_data);
  479. if (IS_ERR(task))
  480. return PTR_ERR(task);
  481. status = rpc_wait_for_completion_task(task);
  482. if (status == -ENOTSUPP)
  483. dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL;
  484. rpc_put_task(task);
  485. return status;
  486. }
  487. static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
  488. struct nfs42_copy_notify_args *args,
  489. struct nfs42_copy_notify_res *res)
  490. {
  491. struct nfs_server *src_server = NFS_SERVER(file_inode(src));
  492. struct rpc_message msg = {
  493. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
  494. .rpc_argp = args,
  495. .rpc_resp = res,
  496. };
  497. int status;
  498. struct nfs_open_context *ctx;
  499. struct nfs_lock_context *l_ctx;
  500. ctx = get_nfs_open_context(nfs_file_open_context(src));
  501. l_ctx = nfs_get_lock_context(ctx);
  502. if (IS_ERR(l_ctx)) {
  503. status = PTR_ERR(l_ctx);
  504. goto out;
  505. }
  506. status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
  507. FMODE_READ);
  508. nfs_put_lock_context(l_ctx);
  509. if (status) {
  510. if (status == -EAGAIN)
  511. status = -NFS4ERR_BAD_STATEID;
  512. goto out;
  513. }
  514. status = nfs4_call_sync(src_server->client, src_server, &msg,
  515. &args->cna_seq_args, &res->cnr_seq_res, 0);
  516. if (status == -ENOTSUPP)
  517. src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
  518. out:
  519. put_nfs_open_context(nfs_file_open_context(src));
  520. return status;
  521. }
  522. int nfs42_proc_copy_notify(struct file *src, struct file *dst,
  523. struct nfs42_copy_notify_res *res)
  524. {
  525. struct nfs_server *src_server = NFS_SERVER(file_inode(src));
  526. struct nfs42_copy_notify_args *args;
  527. struct nfs4_exception exception = {
  528. .inode = file_inode(src),
  529. };
  530. int status;
  531. if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
  532. return -EOPNOTSUPP;
  533. args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
  534. if (args == NULL)
  535. return -ENOMEM;
  536. args->cna_src_fh = NFS_FH(file_inode(src)),
  537. args->cna_dst.nl4_type = NL4_NETADDR;
  538. nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
  539. exception.stateid = &args->cna_src_stateid;
  540. do {
  541. status = _nfs42_proc_copy_notify(src, dst, args, res);
  542. if (status == -ENOTSUPP) {
  543. status = -EOPNOTSUPP;
  544. goto out;
  545. }
  546. status = nfs4_handle_exception(src_server, status, &exception);
  547. } while (exception.retry);
  548. out:
  549. kfree(args);
  550. return status;
  551. }
  552. static loff_t _nfs42_proc_llseek(struct file *filep,
  553. struct nfs_lock_context *lock, loff_t offset, int whence)
  554. {
  555. struct inode *inode = file_inode(filep);
  556. struct nfs42_seek_args args = {
  557. .sa_fh = NFS_FH(inode),
  558. .sa_offset = offset,
  559. .sa_what = (whence == SEEK_HOLE) ?
  560. NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
  561. };
  562. struct nfs42_seek_res res;
  563. struct rpc_message msg = {
  564. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
  565. .rpc_argp = &args,
  566. .rpc_resp = &res,
  567. };
  568. struct nfs_server *server = NFS_SERVER(inode);
  569. int status;
  570. if (!nfs_server_capable(inode, NFS_CAP_SEEK))
  571. return -ENOTSUPP;
  572. status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
  573. lock, FMODE_READ);
  574. if (status) {
  575. if (status == -EAGAIN)
  576. status = -NFS4ERR_BAD_STATEID;
  577. return status;
  578. }
  579. status = nfs_filemap_write_and_wait_range(inode->i_mapping,
  580. offset, LLONG_MAX);
  581. if (status)
  582. return status;
  583. status = nfs4_call_sync(server->client, server, &msg,
  584. &args.seq_args, &res.seq_res, 0);
  585. if (status == -ENOTSUPP)
  586. server->caps &= ~NFS_CAP_SEEK;
  587. if (status)
  588. return status;
  589. if (whence == SEEK_DATA && res.sr_eof)
  590. return -NFS4ERR_NXIO;
  591. else
  592. return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
  593. }
  594. loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
  595. {
  596. struct nfs_server *server = NFS_SERVER(file_inode(filep));
  597. struct nfs4_exception exception = { };
  598. struct nfs_lock_context *lock;
  599. loff_t err;
  600. lock = nfs_get_lock_context(nfs_file_open_context(filep));
  601. if (IS_ERR(lock))
  602. return PTR_ERR(lock);
  603. exception.inode = file_inode(filep);
  604. exception.state = lock->open_context->state;
  605. do {
  606. err = _nfs42_proc_llseek(filep, lock, offset, whence);
  607. if (err >= 0)
  608. break;
  609. if (err == -ENOTSUPP) {
  610. err = -EOPNOTSUPP;
  611. break;
  612. }
  613. err = nfs4_handle_exception(server, err, &exception);
  614. } while (exception.retry);
  615. nfs_put_lock_context(lock);
  616. return err;
  617. }
  618. static void
  619. nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
  620. {
  621. struct nfs42_layoutstat_data *data = calldata;
  622. struct inode *inode = data->inode;
  623. struct nfs_server *server = NFS_SERVER(inode);
  624. struct pnfs_layout_hdr *lo;
  625. spin_lock(&inode->i_lock);
  626. lo = NFS_I(inode)->layout;
  627. if (!pnfs_layout_is_valid(lo)) {
  628. spin_unlock(&inode->i_lock);
  629. rpc_exit(task, 0);
  630. return;
  631. }
  632. nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
  633. spin_unlock(&inode->i_lock);
  634. nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
  635. &data->res.seq_res, task);
  636. }
  637. static void
  638. nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
  639. {
  640. struct nfs42_layoutstat_data *data = calldata;
  641. struct inode *inode = data->inode;
  642. struct pnfs_layout_hdr *lo;
  643. if (!nfs4_sequence_done(task, &data->res.seq_res))
  644. return;
  645. switch (task->tk_status) {
  646. case 0:
  647. return;
  648. case -NFS4ERR_BADHANDLE:
  649. case -ESTALE:
  650. pnfs_destroy_layout(NFS_I(inode));
  651. break;
  652. case -NFS4ERR_EXPIRED:
  653. case -NFS4ERR_ADMIN_REVOKED:
  654. case -NFS4ERR_DELEG_REVOKED:
  655. case -NFS4ERR_STALE_STATEID:
  656. case -NFS4ERR_BAD_STATEID:
  657. spin_lock(&inode->i_lock);
  658. lo = NFS_I(inode)->layout;
  659. if (pnfs_layout_is_valid(lo) &&
  660. nfs4_stateid_match(&data->args.stateid,
  661. &lo->plh_stateid)) {
  662. LIST_HEAD(head);
  663. /*
  664. * Mark the bad layout state as invalid, then retry
  665. * with the current stateid.
  666. */
  667. pnfs_mark_layout_stateid_invalid(lo, &head);
  668. spin_unlock(&inode->i_lock);
  669. pnfs_free_lseg_list(&head);
  670. nfs_commit_inode(inode, 0);
  671. } else
  672. spin_unlock(&inode->i_lock);
  673. break;
  674. case -NFS4ERR_OLD_STATEID:
  675. spin_lock(&inode->i_lock);
  676. lo = NFS_I(inode)->layout;
  677. if (pnfs_layout_is_valid(lo) &&
  678. nfs4_stateid_match_other(&data->args.stateid,
  679. &lo->plh_stateid)) {
  680. /* Do we need to delay before resending? */
  681. if (!nfs4_stateid_is_newer(&lo->plh_stateid,
  682. &data->args.stateid))
  683. rpc_delay(task, HZ);
  684. rpc_restart_call_prepare(task);
  685. }
  686. spin_unlock(&inode->i_lock);
  687. break;
  688. case -ENOTSUPP:
  689. case -EOPNOTSUPP:
  690. NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
  691. }
  692. trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status);
  693. }
  694. static void
  695. nfs42_layoutstat_release(void *calldata)
  696. {
  697. struct nfs42_layoutstat_data *data = calldata;
  698. struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo;
  699. int i;
  700. for (i = 0; i < data->args.num_dev; i++) {
  701. if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free)
  702. devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
  703. }
  704. pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
  705. smp_mb__before_atomic();
  706. clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
  707. smp_mb__after_atomic();
  708. nfs_iput_and_deactive(data->inode);
  709. kfree(data->args.devinfo);
  710. kfree(data);
  711. }
  712. static const struct rpc_call_ops nfs42_layoutstat_ops = {
  713. .rpc_call_prepare = nfs42_layoutstat_prepare,
  714. .rpc_call_done = nfs42_layoutstat_done,
  715. .rpc_release = nfs42_layoutstat_release,
  716. };
  717. int nfs42_proc_layoutstats_generic(struct nfs_server *server,
  718. struct nfs42_layoutstat_data *data)
  719. {
  720. struct rpc_message msg = {
  721. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
  722. .rpc_argp = &data->args,
  723. .rpc_resp = &data->res,
  724. };
  725. struct rpc_task_setup task_setup = {
  726. .rpc_client = server->client,
  727. .rpc_message = &msg,
  728. .callback_ops = &nfs42_layoutstat_ops,
  729. .callback_data = data,
  730. .flags = RPC_TASK_ASYNC,
  731. };
  732. struct rpc_task *task;
  733. data->inode = nfs_igrab_and_active(data->args.inode);
  734. if (!data->inode) {
  735. nfs42_layoutstat_release(data);
  736. return -EAGAIN;
  737. }
  738. nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
  739. task = rpc_run_task(&task_setup);
  740. if (IS_ERR(task))
  741. return PTR_ERR(task);
  742. rpc_put_task(task);
  743. return 0;
  744. }
  745. static struct nfs42_layouterror_data *
  746. nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
  747. {
  748. struct nfs42_layouterror_data *data;
  749. struct inode *inode = lseg->pls_layout->plh_inode;
  750. data = kzalloc(sizeof(*data), gfp_flags);
  751. if (data) {
  752. data->args.inode = data->inode = nfs_igrab_and_active(inode);
  753. if (data->inode) {
  754. data->lseg = pnfs_get_lseg(lseg);
  755. if (data->lseg)
  756. return data;
  757. nfs_iput_and_deactive(data->inode);
  758. }
  759. kfree(data);
  760. }
  761. return NULL;
  762. }
  763. static void
  764. nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
  765. {
  766. pnfs_put_lseg(data->lseg);
  767. nfs_iput_and_deactive(data->inode);
  768. kfree(data);
  769. }
  770. static void
  771. nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
  772. {
  773. struct nfs42_layouterror_data *data = calldata;
  774. struct inode *inode = data->inode;
  775. struct nfs_server *server = NFS_SERVER(inode);
  776. struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
  777. unsigned i;
  778. spin_lock(&inode->i_lock);
  779. if (!pnfs_layout_is_valid(lo)) {
  780. spin_unlock(&inode->i_lock);
  781. rpc_exit(task, 0);
  782. return;
  783. }
  784. for (i = 0; i < data->args.num_errors; i++)
  785. nfs4_stateid_copy(&data->args.errors[i].stateid,
  786. &lo->plh_stateid);
  787. spin_unlock(&inode->i_lock);
  788. nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
  789. &data->res.seq_res, task);
  790. }
  791. static void
  792. nfs42_layouterror_done(struct rpc_task *task, void *calldata)
  793. {
  794. struct nfs42_layouterror_data *data = calldata;
  795. struct inode *inode = data->inode;
  796. struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
  797. if (!nfs4_sequence_done(task, &data->res.seq_res))
  798. return;
  799. switch (task->tk_status) {
  800. case 0:
  801. return;
  802. case -NFS4ERR_BADHANDLE:
  803. case -ESTALE:
  804. pnfs_destroy_layout(NFS_I(inode));
  805. break;
  806. case -NFS4ERR_EXPIRED:
  807. case -NFS4ERR_ADMIN_REVOKED:
  808. case -NFS4ERR_DELEG_REVOKED:
  809. case -NFS4ERR_STALE_STATEID:
  810. case -NFS4ERR_BAD_STATEID:
  811. spin_lock(&inode->i_lock);
  812. if (pnfs_layout_is_valid(lo) &&
  813. nfs4_stateid_match(&data->args.errors[0].stateid,
  814. &lo->plh_stateid)) {
  815. LIST_HEAD(head);
  816. /*
  817. * Mark the bad layout state as invalid, then retry
  818. * with the current stateid.
  819. */
  820. pnfs_mark_layout_stateid_invalid(lo, &head);
  821. spin_unlock(&inode->i_lock);
  822. pnfs_free_lseg_list(&head);
  823. nfs_commit_inode(inode, 0);
  824. } else
  825. spin_unlock(&inode->i_lock);
  826. break;
  827. case -NFS4ERR_OLD_STATEID:
  828. spin_lock(&inode->i_lock);
  829. if (pnfs_layout_is_valid(lo) &&
  830. nfs4_stateid_match_other(&data->args.errors[0].stateid,
  831. &lo->plh_stateid)) {
  832. /* Do we need to delay before resending? */
  833. if (!nfs4_stateid_is_newer(&lo->plh_stateid,
  834. &data->args.errors[0].stateid))
  835. rpc_delay(task, HZ);
  836. rpc_restart_call_prepare(task);
  837. }
  838. spin_unlock(&inode->i_lock);
  839. break;
  840. case -ENOTSUPP:
  841. case -EOPNOTSUPP:
  842. NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
  843. }
  844. trace_nfs4_layouterror(inode, &data->args.errors[0].stateid,
  845. task->tk_status);
  846. }
  847. static void
  848. nfs42_layouterror_release(void *calldata)
  849. {
  850. struct nfs42_layouterror_data *data = calldata;
  851. nfs42_free_layouterror_data(data);
  852. }
  853. static const struct rpc_call_ops nfs42_layouterror_ops = {
  854. .rpc_call_prepare = nfs42_layouterror_prepare,
  855. .rpc_call_done = nfs42_layouterror_done,
  856. .rpc_release = nfs42_layouterror_release,
  857. };
  858. int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
  859. const struct nfs42_layout_error *errors, size_t n)
  860. {
  861. struct inode *inode = lseg->pls_layout->plh_inode;
  862. struct nfs42_layouterror_data *data;
  863. struct rpc_task *task;
  864. struct rpc_message msg = {
  865. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
  866. };
  867. struct rpc_task_setup task_setup = {
  868. .rpc_message = &msg,
  869. .callback_ops = &nfs42_layouterror_ops,
  870. .flags = RPC_TASK_ASYNC,
  871. };
  872. unsigned int i;
  873. if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
  874. return -EOPNOTSUPP;
  875. if (n > NFS42_LAYOUTERROR_MAX)
  876. return -EINVAL;
  877. data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
  878. if (!data)
  879. return -ENOMEM;
  880. for (i = 0; i < n; i++) {
  881. data->args.errors[i] = errors[i];
  882. data->args.num_errors++;
  883. data->res.num_errors++;
  884. }
  885. msg.rpc_argp = &data->args;
  886. msg.rpc_resp = &data->res;
  887. task_setup.callback_data = data;
  888. task_setup.rpc_client = NFS_SERVER(inode)->client;
  889. nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
  890. task = rpc_run_task(&task_setup);
  891. if (IS_ERR(task))
  892. return PTR_ERR(task);
  893. rpc_put_task(task);
  894. return 0;
  895. }
  896. EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
  897. static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
  898. struct file *dst_f, struct nfs_lock_context *src_lock,
  899. struct nfs_lock_context *dst_lock, loff_t src_offset,
  900. loff_t dst_offset, loff_t count)
  901. {
  902. struct inode *src_inode = file_inode(src_f);
  903. struct inode *dst_inode = file_inode(dst_f);
  904. struct nfs_server *server = NFS_SERVER(dst_inode);
  905. struct nfs42_clone_args args = {
  906. .src_fh = NFS_FH(src_inode),
  907. .dst_fh = NFS_FH(dst_inode),
  908. .src_offset = src_offset,
  909. .dst_offset = dst_offset,
  910. .count = count,
  911. .dst_bitmask = server->cache_consistency_bitmask,
  912. };
  913. struct nfs42_clone_res res = {
  914. .server = server,
  915. };
  916. int status;
  917. msg->rpc_argp = &args;
  918. msg->rpc_resp = &res;
  919. status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
  920. src_lock, FMODE_READ);
  921. if (status) {
  922. if (status == -EAGAIN)
  923. status = -NFS4ERR_BAD_STATEID;
  924. return status;
  925. }
  926. status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
  927. dst_lock, FMODE_WRITE);
  928. if (status) {
  929. if (status == -EAGAIN)
  930. status = -NFS4ERR_BAD_STATEID;
  931. return status;
  932. }
  933. res.dst_fattr = nfs_alloc_fattr();
  934. if (!res.dst_fattr)
  935. return -ENOMEM;
  936. status = nfs4_call_sync(server->client, server, msg,
  937. &args.seq_args, &res.seq_res, 0);
  938. if (status == 0)
  939. status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
  940. kfree(res.dst_fattr);
  941. return status;
  942. }
  943. int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
  944. loff_t src_offset, loff_t dst_offset, loff_t count)
  945. {
  946. struct rpc_message msg = {
  947. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
  948. };
  949. struct inode *inode = file_inode(src_f);
  950. struct nfs_server *server = NFS_SERVER(file_inode(src_f));
  951. struct nfs_lock_context *src_lock;
  952. struct nfs_lock_context *dst_lock;
  953. struct nfs4_exception src_exception = { };
  954. struct nfs4_exception dst_exception = { };
  955. int err, err2;
  956. if (!nfs_server_capable(inode, NFS_CAP_CLONE))
  957. return -EOPNOTSUPP;
  958. src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
  959. if (IS_ERR(src_lock))
  960. return PTR_ERR(src_lock);
  961. src_exception.inode = file_inode(src_f);
  962. src_exception.state = src_lock->open_context->state;
  963. dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
  964. if (IS_ERR(dst_lock)) {
  965. err = PTR_ERR(dst_lock);
  966. goto out_put_src_lock;
  967. }
  968. dst_exception.inode = file_inode(dst_f);
  969. dst_exception.state = dst_lock->open_context->state;
  970. do {
  971. err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
  972. src_offset, dst_offset, count);
  973. if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
  974. NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
  975. err = -EOPNOTSUPP;
  976. break;
  977. }
  978. err2 = nfs4_handle_exception(server, err, &src_exception);
  979. err = nfs4_handle_exception(server, err, &dst_exception);
  980. if (!err)
  981. err = err2;
  982. } while (src_exception.retry || dst_exception.retry);
  983. nfs_put_lock_context(dst_lock);
  984. out_put_src_lock:
  985. nfs_put_lock_context(src_lock);
  986. return err;
  987. }
  988. #define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
  989. static int _nfs42_proc_removexattr(struct inode *inode, const char *name)
  990. {
  991. struct nfs_server *server = NFS_SERVER(inode);
  992. struct nfs42_removexattrargs args = {
  993. .fh = NFS_FH(inode),
  994. .xattr_name = name,
  995. };
  996. struct nfs42_removexattrres res;
  997. struct rpc_message msg = {
  998. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR],
  999. .rpc_argp = &args,
  1000. .rpc_resp = &res,
  1001. };
  1002. int ret;
  1003. unsigned long timestamp = jiffies;
  1004. ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
  1005. &res.seq_res, 1);
  1006. if (!ret)
  1007. nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
  1008. return ret;
  1009. }
  1010. static int _nfs42_proc_setxattr(struct inode *inode, const char *name,
  1011. const void *buf, size_t buflen, int flags)
  1012. {
  1013. struct nfs_server *server = NFS_SERVER(inode);
  1014. struct page *pages[NFS4XATTR_MAXPAGES];
  1015. struct nfs42_setxattrargs arg = {
  1016. .fh = NFS_FH(inode),
  1017. .xattr_pages = pages,
  1018. .xattr_len = buflen,
  1019. .xattr_name = name,
  1020. .xattr_flags = flags,
  1021. };
  1022. struct nfs42_setxattrres res;
  1023. struct rpc_message msg = {
  1024. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR],
  1025. .rpc_argp = &arg,
  1026. .rpc_resp = &res,
  1027. };
  1028. int ret, np;
  1029. unsigned long timestamp = jiffies;
  1030. if (buflen > server->sxasize)
  1031. return -ERANGE;
  1032. if (buflen > 0) {
  1033. np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages);
  1034. if (np < 0)
  1035. return np;
  1036. } else
  1037. np = 0;
  1038. ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
  1039. &res.seq_res, 1);
  1040. for (; np > 0; np--)
  1041. put_page(pages[np - 1]);
  1042. if (!ret)
  1043. nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0);
  1044. return ret;
  1045. }
  1046. static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name,
  1047. void *buf, size_t buflen)
  1048. {
  1049. struct nfs_server *server = NFS_SERVER(inode);
  1050. struct page *pages[NFS4XATTR_MAXPAGES] = {};
  1051. struct nfs42_getxattrargs arg = {
  1052. .fh = NFS_FH(inode),
  1053. .xattr_pages = pages,
  1054. .xattr_len = buflen,
  1055. .xattr_name = name,
  1056. };
  1057. struct nfs42_getxattrres res;
  1058. struct rpc_message msg = {
  1059. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR],
  1060. .rpc_argp = &arg,
  1061. .rpc_resp = &res,
  1062. };
  1063. int ret, np;
  1064. ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
  1065. &res.seq_res, 0);
  1066. if (ret < 0)
  1067. return ret;
  1068. /*
  1069. * Normally, the caching is done one layer up, but for successful
  1070. * RPCS, always cache the result here, even if the caller was
  1071. * just querying the length, or if the reply was too big for
  1072. * the caller. This avoids a second RPC in the case of the
  1073. * common query-alloc-retrieve cycle for xattrs.
  1074. *
  1075. * Note that xattr_len is always capped to XATTR_SIZE_MAX.
  1076. */
  1077. nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len);
  1078. if (buflen) {
  1079. if (res.xattr_len > buflen)
  1080. return -ERANGE;
  1081. _copy_from_pages(buf, pages, 0, res.xattr_len);
  1082. }
  1083. np = DIV_ROUND_UP(res.xattr_len, PAGE_SIZE);
  1084. while (--np >= 0)
  1085. __free_page(pages[np]);
  1086. return res.xattr_len;
  1087. }
  1088. static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf,
  1089. size_t buflen, u64 *cookiep, bool *eofp)
  1090. {
  1091. struct nfs_server *server = NFS_SERVER(inode);
  1092. struct page **pages;
  1093. struct nfs42_listxattrsargs arg = {
  1094. .fh = NFS_FH(inode),
  1095. .cookie = *cookiep,
  1096. };
  1097. struct nfs42_listxattrsres res = {
  1098. .eof = false,
  1099. .xattr_buf = buf,
  1100. .xattr_len = buflen,
  1101. };
  1102. struct rpc_message msg = {
  1103. .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS],
  1104. .rpc_argp = &arg,
  1105. .rpc_resp = &res,
  1106. };
  1107. u32 xdrlen;
  1108. int ret, np, i;
  1109. ret = -ENOMEM;
  1110. res.scratch = alloc_page(GFP_KERNEL);
  1111. if (!res.scratch)
  1112. goto out;
  1113. xdrlen = nfs42_listxattr_xdrsize(buflen);
  1114. if (xdrlen > server->lxasize)
  1115. xdrlen = server->lxasize;
  1116. np = xdrlen / PAGE_SIZE + 1;
  1117. pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL);
  1118. if (!pages)
  1119. goto out_free_scratch;
  1120. for (i = 0; i < np; i++) {
  1121. pages[i] = alloc_page(GFP_KERNEL);
  1122. if (!pages[i])
  1123. goto out_free_pages;
  1124. }
  1125. arg.xattr_pages = pages;
  1126. arg.count = xdrlen;
  1127. ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
  1128. &res.seq_res, 0);
  1129. if (ret >= 0) {
  1130. ret = res.copied;
  1131. *cookiep = res.cookie;
  1132. *eofp = res.eof;
  1133. }
  1134. out_free_pages:
  1135. while (--np >= 0) {
  1136. if (pages[np])
  1137. __free_page(pages[np]);
  1138. }
  1139. kfree(pages);
  1140. out_free_scratch:
  1141. __free_page(res.scratch);
  1142. out:
  1143. return ret;
  1144. }
  1145. ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
  1146. void *buf, size_t buflen)
  1147. {
  1148. struct nfs4_exception exception = { };
  1149. ssize_t err;
  1150. do {
  1151. err = _nfs42_proc_getxattr(inode, name, buf, buflen);
  1152. if (err >= 0)
  1153. break;
  1154. err = nfs4_handle_exception(NFS_SERVER(inode), err,
  1155. &exception);
  1156. } while (exception.retry);
  1157. return err;
  1158. }
  1159. int nfs42_proc_setxattr(struct inode *inode, const char *name,
  1160. const void *buf, size_t buflen, int flags)
  1161. {
  1162. struct nfs4_exception exception = { };
  1163. int err;
  1164. do {
  1165. err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags);
  1166. if (!err)
  1167. break;
  1168. err = nfs4_handle_exception(NFS_SERVER(inode), err,
  1169. &exception);
  1170. } while (exception.retry);
  1171. return err;
  1172. }
  1173. ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
  1174. size_t buflen, u64 *cookiep, bool *eofp)
  1175. {
  1176. struct nfs4_exception exception = { };
  1177. ssize_t err;
  1178. do {
  1179. err = _nfs42_proc_listxattrs(inode, buf, buflen,
  1180. cookiep, eofp);
  1181. if (err >= 0)
  1182. break;
  1183. err = nfs4_handle_exception(NFS_SERVER(inode), err,
  1184. &exception);
  1185. } while (exception.retry);
  1186. return err;
  1187. }
  1188. int nfs42_proc_removexattr(struct inode *inode, const char *name)
  1189. {
  1190. struct nfs4_exception exception = { };
  1191. int err;
  1192. do {
  1193. err = _nfs42_proc_removexattr(inode, name);
  1194. if (!err)
  1195. break;
  1196. err = nfs4_handle_exception(NFS_SERVER(inode), err,
  1197. &exception);
  1198. } while (exception.retry);
  1199. return err;
  1200. }