Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/file.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * Changes Copyright (C) 1994 by Florian La Roche | |
7 | * - Do not copy data too often around in the kernel. | |
8 | * - In nfs_file_read the return value of kmalloc wasn't checked. | |
9 | * - Put in a better version of read look-ahead buffering. Original idea | |
10 | * and implementation by Wai S Kok elekokws@ee.nus.sg. | |
11 | * | |
12 | * Expire cache on write to a file by Wai S Kok (Oct 1994). | |
13 | * | |
14 | * Total rewrite of read side for new NFS buffer cache.. Linus. | |
15 | * | |
16 | * nfs regular file handling functions | |
17 | */ | |
18 | ||
19 | #include <linux/time.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/fcntl.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/nfs_fs.h> | |
25 | #include <linux/nfs_mount.h> | |
26 | #include <linux/mm.h> | |
1da177e4 | 27 | #include <linux/pagemap.h> |
e8edc6e0 | 28 | #include <linux/aio.h> |
5a0e3ad6 | 29 | #include <linux/gfp.h> |
b608b283 | 30 | #include <linux/swap.h> |
1da177e4 LT |
31 | |
32 | #include <asm/uaccess.h> | |
1da177e4 LT |
33 | |
34 | #include "delegation.h" | |
94387fb1 | 35 | #include "internal.h" |
91d5b470 | 36 | #include "iostat.h" |
545db45f | 37 | #include "fscache.h" |
e5e94017 | 38 | #include "pnfs.h" |
1da177e4 LT |
39 | |
40 | #define NFSDBG_FACILITY NFSDBG_FILE | |
41 | ||
f0f37e2f | 42 | static const struct vm_operations_struct nfs_file_vm_ops; |
94387fb1 | 43 | |
b7fa0554 | 44 | #ifdef CONFIG_NFS_V3 |
92e1d5be | 45 | const struct inode_operations nfs3_file_inode_operations = { |
b7fa0554 AG |
46 | .permission = nfs_permission, |
47 | .getattr = nfs_getattr, | |
48 | .setattr = nfs_setattr, | |
49 | .listxattr = nfs3_listxattr, | |
50 | .getxattr = nfs3_getxattr, | |
51 | .setxattr = nfs3_setxattr, | |
52 | .removexattr = nfs3_removexattr, | |
53 | }; | |
54 | #endif /* CONFIG_NFS_v3 */ | |
55 | ||
1da177e4 LT |
56 | /* Hack for future NFS swap support */ |
57 | #ifndef IS_SWAPFILE | |
58 | # define IS_SWAPFILE(inode) (0) | |
59 | #endif | |
60 | ||
61 | static int nfs_check_flags(int flags) | |
62 | { | |
63 | if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT)) | |
64 | return -EINVAL; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | /* | |
70 | * Open file | |
71 | */ | |
72 | static int | |
73 | nfs_file_open(struct inode *inode, struct file *filp) | |
74 | { | |
1da177e4 LT |
75 | int res; |
76 | ||
6da24bc9 | 77 | dprintk("NFS: open file(%s/%s)\n", |
cc0dd2d1 CL |
78 | filp->f_path.dentry->d_parent->d_name.name, |
79 | filp->f_path.dentry->d_name.name); | |
80 | ||
c2459dc4 | 81 | nfs_inc_stats(inode, NFSIOS_VFSOPEN); |
1da177e4 LT |
82 | res = nfs_check_flags(filp->f_flags); |
83 | if (res) | |
84 | return res; | |
85 | ||
46cb650c | 86 | res = nfs_open(inode, filp); |
1da177e4 LT |
87 | return res; |
88 | } | |
89 | ||
90 | static int | |
91 | nfs_file_release(struct inode *inode, struct file *filp) | |
92 | { | |
6da24bc9 | 93 | dprintk("NFS: release(%s/%s)\n", |
6f276e49 RM |
94 | filp->f_path.dentry->d_parent->d_name.name, |
95 | filp->f_path.dentry->d_name.name); | |
6da24bc9 | 96 | |
91d5b470 | 97 | nfs_inc_stats(inode, NFSIOS_VFSRELEASE); |
46cb650c | 98 | return nfs_release(inode, filp); |
1da177e4 LT |
99 | } |
100 | ||
980802e3 TM |
101 | /** |
102 | * nfs_revalidate_size - Revalidate the file size | |
103 | * @inode - pointer to inode struct | |
104 | * @file - pointer to struct file | |
105 | * | |
106 | * Revalidates the file length. This is basically a wrapper around | |
107 | * nfs_revalidate_inode() that takes into account the fact that we may | |
108 | * have cached writes (in which case we don't care about the server's | |
109 | * idea of what the file length is), or O_DIRECT (in which case we | |
110 | * shouldn't trust the cache). | |
111 | */ | |
112 | static int nfs_revalidate_file_size(struct inode *inode, struct file *filp) | |
113 | { | |
114 | struct nfs_server *server = NFS_SERVER(inode); | |
115 | struct nfs_inode *nfsi = NFS_I(inode); | |
116 | ||
d7cf8dd0 TM |
117 | if (nfs_have_delegated_attributes(inode)) |
118 | goto out_noreval; | |
119 | ||
980802e3 TM |
120 | if (filp->f_flags & O_DIRECT) |
121 | goto force_reval; | |
d7cf8dd0 TM |
122 | if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
123 | goto force_reval; | |
124 | if (nfs_attribute_timeout(inode)) | |
125 | goto force_reval; | |
126 | out_noreval: | |
127 | return 0; | |
980802e3 TM |
128 | force_reval: |
129 | return __nfs_revalidate_inode(server, inode); | |
130 | } | |
131 | ||
132 | static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) | |
133 | { | |
6da24bc9 | 134 | dprintk("NFS: llseek file(%s/%s, %lld, %d)\n", |
b84e06c5 CL |
135 | filp->f_path.dentry->d_parent->d_name.name, |
136 | filp->f_path.dentry->d_name.name, | |
137 | offset, origin); | |
138 | ||
06222e49 JB |
139 | /* |
140 | * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate | |
141 | * the cached file length | |
142 | */ | |
6c529617 | 143 | if (origin != SEEK_SET && origin != SEEK_CUR) { |
980802e3 | 144 | struct inode *inode = filp->f_mapping->host; |
d5e66348 | 145 | |
980802e3 TM |
146 | int retval = nfs_revalidate_file_size(inode, filp); |
147 | if (retval < 0) | |
148 | return (loff_t)retval; | |
79835a71 | 149 | } |
d5e66348 | 150 | |
79835a71 | 151 | return generic_file_llseek(filp, offset, origin); |
980802e3 TM |
152 | } |
153 | ||
1da177e4 LT |
154 | /* |
155 | * Flush all dirty pages, and check for write errors. | |
1da177e4 LT |
156 | */ |
157 | static int | |
75e1fcc0 | 158 | nfs_file_flush(struct file *file, fl_owner_t id) |
1da177e4 | 159 | { |
6da24bc9 CL |
160 | struct dentry *dentry = file->f_path.dentry; |
161 | struct inode *inode = dentry->d_inode; | |
1da177e4 | 162 | |
6da24bc9 CL |
163 | dprintk("NFS: flush(%s/%s)\n", |
164 | dentry->d_parent->d_name.name, | |
165 | dentry->d_name.name); | |
1da177e4 | 166 | |
c2459dc4 | 167 | nfs_inc_stats(inode, NFSIOS_VFSFLUSH); |
1da177e4 LT |
168 | if ((file->f_mode & FMODE_WRITE) == 0) |
169 | return 0; | |
7b159fc1 | 170 | |
14546c33 TM |
171 | /* |
172 | * If we're holding a write delegation, then just start the i/o | |
173 | * but don't wait for completion (or send a commit). | |
174 | */ | |
011e2a7f | 175 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) |
14546c33 TM |
176 | return filemap_fdatawrite(file->f_mapping); |
177 | ||
7fe5c398 | 178 | /* Flush writes to the server and return any errors */ |
af7fa165 | 179 | return vfs_fsync(file, 0); |
1da177e4 LT |
180 | } |
181 | ||
182 | static ssize_t | |
027445c3 BP |
183 | nfs_file_read(struct kiocb *iocb, const struct iovec *iov, |
184 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 185 | { |
01cce933 | 186 | struct dentry * dentry = iocb->ki_filp->f_path.dentry; |
1da177e4 LT |
187 | struct inode * inode = dentry->d_inode; |
188 | ssize_t result; | |
189 | ||
1da177e4 | 190 | if (iocb->ki_filp->f_flags & O_DIRECT) |
027445c3 | 191 | return nfs_file_direct_read(iocb, iov, nr_segs, pos); |
1da177e4 | 192 | |
6da24bc9 | 193 | dprintk("NFS: read(%s/%s, %lu@%lu)\n", |
1da177e4 | 194 | dentry->d_parent->d_name.name, dentry->d_name.name, |
6f276e49 | 195 | (unsigned long) iov_length(iov, nr_segs), (unsigned long) pos); |
1da177e4 | 196 | |
44b11874 | 197 | result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping); |
4184dcf2 | 198 | if (!result) { |
027445c3 | 199 | result = generic_file_aio_read(iocb, iov, nr_segs, pos); |
4184dcf2 CL |
200 | if (result > 0) |
201 | nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result); | |
202 | } | |
1da177e4 LT |
203 | return result; |
204 | } | |
205 | ||
206 | static ssize_t | |
f0930fff JA |
207 | nfs_file_splice_read(struct file *filp, loff_t *ppos, |
208 | struct pipe_inode_info *pipe, size_t count, | |
209 | unsigned int flags) | |
1da177e4 | 210 | { |
01cce933 | 211 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
212 | struct inode *inode = dentry->d_inode; |
213 | ssize_t res; | |
214 | ||
6da24bc9 | 215 | dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n", |
1da177e4 LT |
216 | dentry->d_parent->d_name.name, dentry->d_name.name, |
217 | (unsigned long) count, (unsigned long long) *ppos); | |
218 | ||
44b11874 | 219 | res = nfs_revalidate_mapping(inode, filp->f_mapping); |
aa2f1ef1 | 220 | if (!res) { |
f0930fff | 221 | res = generic_file_splice_read(filp, ppos, pipe, count, flags); |
aa2f1ef1 CL |
222 | if (res > 0) |
223 | nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, res); | |
224 | } | |
1da177e4 LT |
225 | return res; |
226 | } | |
227 | ||
228 | static int | |
229 | nfs_file_mmap(struct file * file, struct vm_area_struct * vma) | |
230 | { | |
01cce933 | 231 | struct dentry *dentry = file->f_path.dentry; |
1da177e4 LT |
232 | struct inode *inode = dentry->d_inode; |
233 | int status; | |
234 | ||
6da24bc9 | 235 | dprintk("NFS: mmap(%s/%s)\n", |
1da177e4 LT |
236 | dentry->d_parent->d_name.name, dentry->d_name.name); |
237 | ||
e1ebfd33 TM |
238 | /* Note: generic_file_mmap() returns ENOSYS on nommu systems |
239 | * so we call that before revalidating the mapping | |
240 | */ | |
241 | status = generic_file_mmap(file, vma); | |
94387fb1 TM |
242 | if (!status) { |
243 | vma->vm_ops = &nfs_file_vm_ops; | |
e1ebfd33 | 244 | status = nfs_revalidate_mapping(inode, file->f_mapping); |
94387fb1 | 245 | } |
1da177e4 LT |
246 | return status; |
247 | } | |
248 | ||
249 | /* | |
250 | * Flush any dirty pages for this process, and check for write errors. | |
251 | * The return status from this call provides a reliable indication of | |
252 | * whether any write errors occurred for this process. | |
af7fa165 TM |
253 | * |
254 | * Notice that it clears the NFS_CONTEXT_ERROR_WRITE before synching to | |
255 | * disk, but it retrieves and clears ctx->error after synching, despite | |
256 | * the two being set at the same time in nfs_context_set_write_error(). | |
257 | * This is because the former is used to notify the _next_ call to | |
25985edc | 258 | * nfs_file_write() that a write error occurred, and hence cause it to |
af7fa165 | 259 | * fall back to doing a synchronous write. |
1da177e4 LT |
260 | */ |
261 | static int | |
a5c58892 | 262 | nfs_file_fsync_commit(struct file *file, loff_t start, loff_t end, int datasync) |
1da177e4 | 263 | { |
7ea80859 | 264 | struct dentry *dentry = file->f_path.dentry; |
cd3758e3 | 265 | struct nfs_open_context *ctx = nfs_file_open_context(file); |
1da177e4 | 266 | struct inode *inode = dentry->d_inode; |
af7fa165 TM |
267 | int have_error, status; |
268 | int ret = 0; | |
269 | ||
6da24bc9 | 270 | dprintk("NFS: fsync file(%s/%s) datasync %d\n", |
54917786 CL |
271 | dentry->d_parent->d_name.name, dentry->d_name.name, |
272 | datasync); | |
1da177e4 | 273 | |
91d5b470 | 274 | nfs_inc_stats(inode, NFSIOS_VFSFSYNC); |
af7fa165 TM |
275 | have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); |
276 | status = nfs_commit_inode(inode, FLUSH_SYNC); | |
2edb6bc3 N |
277 | if (status >= 0 && ret < 0) |
278 | status = ret; | |
af7fa165 TM |
279 | have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); |
280 | if (have_error) | |
281 | ret = xchg(&ctx->error, 0); | |
0702099b | 282 | if (!ret && status < 0) |
af7fa165 | 283 | ret = status; |
a5c58892 BS |
284 | return ret; |
285 | } | |
286 | ||
287 | static int | |
288 | nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) | |
289 | { | |
290 | int ret; | |
291 | struct inode *inode = file->f_path.dentry->d_inode; | |
292 | ||
293 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); | |
294 | mutex_lock(&inode->i_mutex); | |
295 | ret = nfs_file_fsync_commit(file, start, end, datasync); | |
02c24a82 | 296 | mutex_unlock(&inode->i_mutex); |
a5c58892 | 297 | |
af7fa165 | 298 | return ret; |
1da177e4 LT |
299 | } |
300 | ||
38c73044 PS |
301 | /* |
302 | * Decide whether a read/modify/write cycle may be more efficient | |
303 | * then a modify/write/read cycle when writing to a page in the | |
304 | * page cache. | |
305 | * | |
306 | * The modify/write/read cycle may occur if a page is read before | |
307 | * being completely filled by the writer. In this situation, the | |
308 | * page must be completely written to stable storage on the server | |
309 | * before it can be refilled by reading in the page from the server. | |
310 | * This can lead to expensive, small, FILE_SYNC mode writes being | |
311 | * done. | |
312 | * | |
313 | * It may be more efficient to read the page first if the file is | |
314 | * open for reading in addition to writing, the page is not marked | |
315 | * as Uptodate, it is not dirty or waiting to be committed, | |
316 | * indicating that it was previously allocated and then modified, | |
317 | * that there were valid bytes of data in that range of the file, | |
318 | * and that the new data won't completely replace the old data in | |
319 | * that range of the file. | |
320 | */ | |
321 | static int nfs_want_read_modify_write(struct file *file, struct page *page, | |
322 | loff_t pos, unsigned len) | |
323 | { | |
324 | unsigned int pglen = nfs_page_length(page); | |
325 | unsigned int offset = pos & (PAGE_CACHE_SIZE - 1); | |
326 | unsigned int end = offset + len; | |
327 | ||
328 | if ((file->f_mode & FMODE_READ) && /* open for read? */ | |
329 | !PageUptodate(page) && /* Uptodate? */ | |
330 | !PagePrivate(page) && /* i/o request already? */ | |
331 | pglen && /* valid bytes of file? */ | |
332 | (end < pglen || offset)) /* replace all valid bytes? */ | |
333 | return 1; | |
334 | return 0; | |
335 | } | |
336 | ||
1da177e4 | 337 | /* |
4899f9c8 NP |
338 | * This does the "real" work of the write. We must allocate and lock the |
339 | * page to be sent back to the generic routine, which then copies the | |
340 | * data from user space. | |
1da177e4 LT |
341 | * |
342 | * If the writer ends up delaying the write, the writer needs to | |
343 | * increment the page use counts until he is done with the page. | |
344 | */ | |
4899f9c8 NP |
345 | static int nfs_write_begin(struct file *file, struct address_space *mapping, |
346 | loff_t pos, unsigned len, unsigned flags, | |
347 | struct page **pagep, void **fsdata) | |
1da177e4 | 348 | { |
4899f9c8 | 349 | int ret; |
38c73044 | 350 | pgoff_t index = pos >> PAGE_CACHE_SHIFT; |
4899f9c8 | 351 | struct page *page; |
38c73044 | 352 | int once_thru = 0; |
4899f9c8 | 353 | |
b7eaefaa CL |
354 | dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n", |
355 | file->f_path.dentry->d_parent->d_name.name, | |
356 | file->f_path.dentry->d_name.name, | |
357 | mapping->host->i_ino, len, (long long) pos); | |
358 | ||
38c73044 | 359 | start: |
72cb77f4 TM |
360 | /* |
361 | * Prevent starvation issues if someone is doing a consistency | |
362 | * sync-to-disk | |
363 | */ | |
364 | ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING, | |
365 | nfs_wait_bit_killable, TASK_KILLABLE); | |
366 | if (ret) | |
367 | return ret; | |
368 | ||
54566b2c | 369 | page = grab_cache_page_write_begin(mapping, index, flags); |
4899f9c8 NP |
370 | if (!page) |
371 | return -ENOMEM; | |
372 | *pagep = page; | |
373 | ||
374 | ret = nfs_flush_incompatible(file, page); | |
375 | if (ret) { | |
376 | unlock_page(page); | |
377 | page_cache_release(page); | |
38c73044 PS |
378 | } else if (!once_thru && |
379 | nfs_want_read_modify_write(file, page, pos, len)) { | |
380 | once_thru = 1; | |
381 | ret = nfs_readpage(file, page); | |
382 | page_cache_release(page); | |
383 | if (!ret) | |
384 | goto start; | |
4899f9c8 NP |
385 | } |
386 | return ret; | |
1da177e4 LT |
387 | } |
388 | ||
4899f9c8 NP |
389 | static int nfs_write_end(struct file *file, struct address_space *mapping, |
390 | loff_t pos, unsigned len, unsigned copied, | |
391 | struct page *page, void *fsdata) | |
1da177e4 | 392 | { |
4899f9c8 NP |
393 | unsigned offset = pos & (PAGE_CACHE_SIZE - 1); |
394 | int status; | |
1da177e4 | 395 | |
b7eaefaa CL |
396 | dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n", |
397 | file->f_path.dentry->d_parent->d_name.name, | |
398 | file->f_path.dentry->d_name.name, | |
399 | mapping->host->i_ino, len, (long long) pos); | |
400 | ||
efc91ed0 TM |
401 | /* |
402 | * Zero any uninitialised parts of the page, and then mark the page | |
403 | * as up to date if it turns out that we're extending the file. | |
404 | */ | |
405 | if (!PageUptodate(page)) { | |
406 | unsigned pglen = nfs_page_length(page); | |
407 | unsigned end = offset + len; | |
408 | ||
409 | if (pglen == 0) { | |
410 | zero_user_segments(page, 0, offset, | |
411 | end, PAGE_CACHE_SIZE); | |
412 | SetPageUptodate(page); | |
413 | } else if (end >= pglen) { | |
414 | zero_user_segment(page, end, PAGE_CACHE_SIZE); | |
415 | if (offset == 0) | |
416 | SetPageUptodate(page); | |
417 | } else | |
418 | zero_user_segment(page, pglen, PAGE_CACHE_SIZE); | |
419 | } | |
420 | ||
4899f9c8 | 421 | status = nfs_updatepage(file, page, offset, copied); |
4899f9c8 NP |
422 | |
423 | unlock_page(page); | |
424 | page_cache_release(page); | |
425 | ||
3d509e54 CL |
426 | if (status < 0) |
427 | return status; | |
2701d086 | 428 | NFS_I(mapping->host)->write_io += copied; |
3d509e54 | 429 | return copied; |
1da177e4 LT |
430 | } |
431 | ||
6b9b3514 DH |
432 | /* |
433 | * Partially or wholly invalidate a page | |
434 | * - Release the private state associated with a page if undergoing complete | |
435 | * page invalidation | |
545db45f | 436 | * - Called if either PG_private or PG_fscache is set on the page |
6b9b3514 DH |
437 | * - Caller holds page lock |
438 | */ | |
2ff28e22 | 439 | static void nfs_invalidate_page(struct page *page, unsigned long offset) |
cd52ed35 | 440 | { |
b7eaefaa CL |
441 | dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset); |
442 | ||
1c75950b TM |
443 | if (offset != 0) |
444 | return; | |
d2ccddf0 | 445 | /* Cancel any unstarted writes on this page */ |
1b3b4a1a | 446 | nfs_wb_page_cancel(page->mapping->host, page); |
545db45f DH |
447 | |
448 | nfs_fscache_invalidate_page(page, page->mapping->host); | |
cd52ed35 TM |
449 | } |
450 | ||
6b9b3514 DH |
451 | /* |
452 | * Attempt to release the private state associated with a page | |
545db45f | 453 | * - Called if either PG_private or PG_fscache is set on the page |
6b9b3514 DH |
454 | * - Caller holds page lock |
455 | * - Return true (may release page) or false (may not) | |
456 | */ | |
cd52ed35 TM |
457 | static int nfs_release_page(struct page *page, gfp_t gfp) |
458 | { | |
b608b283 TM |
459 | struct address_space *mapping = page->mapping; |
460 | ||
b7eaefaa CL |
461 | dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page); |
462 | ||
d812e575 | 463 | /* Only do I/O if gfp is a superset of GFP_KERNEL */ |
b608b283 TM |
464 | if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL) { |
465 | int how = FLUSH_SYNC; | |
466 | ||
467 | /* Don't let kswapd deadlock waiting for OOM RPC calls */ | |
468 | if (current_is_kswapd()) | |
469 | how = 0; | |
470 | nfs_commit_inode(mapping->host, how); | |
471 | } | |
e3db7691 | 472 | /* If PagePrivate() is set, then the page is not freeable */ |
545db45f DH |
473 | if (PagePrivate(page)) |
474 | return 0; | |
475 | return nfs_fscache_release_page(page, gfp); | |
e3db7691 TM |
476 | } |
477 | ||
6b9b3514 DH |
478 | /* |
479 | * Attempt to clear the private state associated with a page when an error | |
480 | * occurs that requires the cached contents of an inode to be written back or | |
481 | * destroyed | |
545db45f | 482 | * - Called if either PG_private or fscache is set on the page |
6b9b3514 DH |
483 | * - Caller holds page lock |
484 | * - Return 0 if successful, -error otherwise | |
485 | */ | |
e3db7691 TM |
486 | static int nfs_launder_page(struct page *page) |
487 | { | |
b7eaefaa | 488 | struct inode *inode = page->mapping->host; |
545db45f | 489 | struct nfs_inode *nfsi = NFS_I(inode); |
b7eaefaa CL |
490 | |
491 | dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n", | |
492 | inode->i_ino, (long long)page_offset(page)); | |
493 | ||
545db45f | 494 | nfs_fscache_wait_on_page_write(nfsi, page); |
b7eaefaa | 495 | return nfs_wb_page(inode, page); |
cd52ed35 TM |
496 | } |
497 | ||
f5e54d6e | 498 | const struct address_space_operations nfs_file_aops = { |
1da177e4 LT |
499 | .readpage = nfs_readpage, |
500 | .readpages = nfs_readpages, | |
9cccef95 | 501 | .set_page_dirty = __set_page_dirty_nobuffers, |
1da177e4 LT |
502 | .writepage = nfs_writepage, |
503 | .writepages = nfs_writepages, | |
4899f9c8 NP |
504 | .write_begin = nfs_write_begin, |
505 | .write_end = nfs_write_end, | |
cd52ed35 TM |
506 | .invalidatepage = nfs_invalidate_page, |
507 | .releasepage = nfs_release_page, | |
1da177e4 | 508 | .direct_IO = nfs_direct_IO, |
074cc1de | 509 | .migratepage = nfs_migrate_page, |
e3db7691 | 510 | .launder_page = nfs_launder_page, |
f590f333 | 511 | .error_remove_page = generic_error_remove_page, |
1da177e4 LT |
512 | }; |
513 | ||
6b9b3514 DH |
514 | /* |
515 | * Notification that a PTE pointing to an NFS page is about to be made | |
516 | * writable, implying that someone is about to modify the page through a | |
517 | * shared-writable mapping | |
518 | */ | |
c2ec175c | 519 | static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) |
94387fb1 | 520 | { |
c2ec175c | 521 | struct page *page = vmf->page; |
94387fb1 | 522 | struct file *filp = vma->vm_file; |
b7eaefaa | 523 | struct dentry *dentry = filp->f_path.dentry; |
94387fb1 | 524 | unsigned pagelen; |
bc4866b6 | 525 | int ret = VM_FAULT_NOPAGE; |
4899f9c8 | 526 | struct address_space *mapping; |
94387fb1 | 527 | |
b7eaefaa CL |
528 | dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n", |
529 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
530 | filp->f_mapping->host->i_ino, | |
531 | (long long)page_offset(page)); | |
532 | ||
545db45f DH |
533 | /* make sure the cache has finished storing the page */ |
534 | nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page); | |
535 | ||
94387fb1 | 536 | lock_page(page); |
4899f9c8 | 537 | mapping = page->mapping; |
b7eaefaa | 538 | if (mapping != dentry->d_inode->i_mapping) |
8b1f9ee5 TM |
539 | goto out_unlock; |
540 | ||
2aeb98f4 TM |
541 | wait_on_page_writeback(page); |
542 | ||
94387fb1 | 543 | pagelen = nfs_page_length(page); |
8b1f9ee5 TM |
544 | if (pagelen == 0) |
545 | goto out_unlock; | |
4899f9c8 | 546 | |
bc4866b6 TM |
547 | ret = VM_FAULT_LOCKED; |
548 | if (nfs_flush_incompatible(filp, page) == 0 && | |
549 | nfs_updatepage(filp, page, 0, pagelen) == 0) | |
550 | goto out; | |
8b1f9ee5 | 551 | |
bc4866b6 | 552 | ret = VM_FAULT_SIGBUS; |
8b1f9ee5 TM |
553 | out_unlock: |
554 | unlock_page(page); | |
bc4866b6 TM |
555 | out: |
556 | return ret; | |
94387fb1 TM |
557 | } |
558 | ||
f0f37e2f | 559 | static const struct vm_operations_struct nfs_file_vm_ops = { |
94387fb1 TM |
560 | .fault = filemap_fault, |
561 | .page_mkwrite = nfs_vm_page_mkwrite, | |
562 | }; | |
563 | ||
7b159fc1 TM |
564 | static int nfs_need_sync_write(struct file *filp, struct inode *inode) |
565 | { | |
566 | struct nfs_open_context *ctx; | |
567 | ||
6b2f3d1f | 568 | if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC)) |
7b159fc1 | 569 | return 1; |
cd3758e3 | 570 | ctx = nfs_file_open_context(filp); |
7b159fc1 TM |
571 | if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) |
572 | return 1; | |
573 | return 0; | |
574 | } | |
575 | ||
027445c3 BP |
576 | static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, |
577 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 578 | { |
01cce933 | 579 | struct dentry * dentry = iocb->ki_filp->f_path.dentry; |
1da177e4 | 580 | struct inode * inode = dentry->d_inode; |
7e381172 | 581 | unsigned long written = 0; |
1da177e4 | 582 | ssize_t result; |
027445c3 | 583 | size_t count = iov_length(iov, nr_segs); |
1da177e4 | 584 | |
1da177e4 | 585 | if (iocb->ki_filp->f_flags & O_DIRECT) |
027445c3 | 586 | return nfs_file_direct_write(iocb, iov, nr_segs, pos); |
1da177e4 | 587 | |
6da24bc9 | 588 | dprintk("NFS: write(%s/%s, %lu@%Ld)\n", |
1da177e4 | 589 | dentry->d_parent->d_name.name, dentry->d_name.name, |
6da24bc9 | 590 | (unsigned long) count, (long long) pos); |
1da177e4 LT |
591 | |
592 | result = -EBUSY; | |
593 | if (IS_SWAPFILE(inode)) | |
594 | goto out_swapfile; | |
7d52e862 TM |
595 | /* |
596 | * O_APPEND implies that we must revalidate the file length. | |
597 | */ | |
598 | if (iocb->ki_filp->f_flags & O_APPEND) { | |
599 | result = nfs_revalidate_file_size(inode, iocb->ki_filp); | |
600 | if (result) | |
601 | goto out; | |
fe51beec | 602 | } |
1da177e4 LT |
603 | |
604 | result = count; | |
605 | if (!count) | |
606 | goto out; | |
607 | ||
027445c3 | 608 | result = generic_file_aio_write(iocb, iov, nr_segs, pos); |
7e381172 CL |
609 | if (result > 0) |
610 | written = result; | |
611 | ||
6b2f3d1f | 612 | /* Return error values for O_DSYNC and IS_SYNC() */ |
7b159fc1 | 613 | if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) { |
af7fa165 | 614 | int err = vfs_fsync(iocb->ki_filp, 0); |
200baa21 TM |
615 | if (err < 0) |
616 | result = err; | |
617 | } | |
7e381172 CL |
618 | if (result > 0) |
619 | nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written); | |
1da177e4 LT |
620 | out: |
621 | return result; | |
622 | ||
623 | out_swapfile: | |
624 | printk(KERN_INFO "NFS: attempt to write to active swap file!\n"); | |
625 | goto out; | |
626 | } | |
627 | ||
bf40d343 SJ |
628 | static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe, |
629 | struct file *filp, loff_t *ppos, | |
630 | size_t count, unsigned int flags) | |
631 | { | |
632 | struct dentry *dentry = filp->f_path.dentry; | |
633 | struct inode *inode = dentry->d_inode; | |
7e381172 | 634 | unsigned long written = 0; |
bf40d343 SJ |
635 | ssize_t ret; |
636 | ||
637 | dprintk("NFS splice_write(%s/%s, %lu@%llu)\n", | |
638 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
639 | (unsigned long) count, (unsigned long long) *ppos); | |
640 | ||
641 | /* | |
642 | * The combination of splice and an O_APPEND destination is disallowed. | |
643 | */ | |
644 | ||
bf40d343 | 645 | ret = generic_file_splice_write(pipe, filp, ppos, count, flags); |
7e381172 CL |
646 | if (ret > 0) |
647 | written = ret; | |
648 | ||
bf40d343 | 649 | if (ret >= 0 && nfs_need_sync_write(filp, inode)) { |
af7fa165 | 650 | int err = vfs_fsync(filp, 0); |
bf40d343 SJ |
651 | if (err < 0) |
652 | ret = err; | |
653 | } | |
7e381172 CL |
654 | if (ret > 0) |
655 | nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written); | |
bf40d343 SJ |
656 | return ret; |
657 | } | |
658 | ||
5eebde23 SJ |
659 | static int |
660 | do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) | |
1da177e4 LT |
661 | { |
662 | struct inode *inode = filp->f_mapping->host; | |
663 | int status = 0; | |
21ac19d4 | 664 | unsigned int saved_type = fl->fl_type; |
1da177e4 | 665 | |
039c4d7a | 666 | /* Try local locking first */ |
6d34ac19 BF |
667 | posix_test_lock(filp, fl); |
668 | if (fl->fl_type != F_UNLCK) { | |
669 | /* found a conflict */ | |
039c4d7a | 670 | goto out; |
1da177e4 | 671 | } |
21ac19d4 | 672 | fl->fl_type = saved_type; |
039c4d7a | 673 | |
011e2a7f | 674 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
039c4d7a TM |
675 | goto out_noconflict; |
676 | ||
5eebde23 | 677 | if (is_local) |
039c4d7a TM |
678 | goto out_noconflict; |
679 | ||
680 | status = NFS_PROTO(inode)->lock(filp, cmd, fl); | |
681 | out: | |
1da177e4 | 682 | return status; |
039c4d7a TM |
683 | out_noconflict: |
684 | fl->fl_type = F_UNLCK; | |
685 | goto out; | |
1da177e4 LT |
686 | } |
687 | ||
688 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
689 | { | |
690 | int res = 0; | |
691 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
692 | case FL_POSIX: | |
693 | res = posix_lock_file_wait(file, fl); | |
694 | break; | |
695 | case FL_FLOCK: | |
696 | res = flock_lock_file_wait(file, fl); | |
697 | break; | |
698 | default: | |
699 | BUG(); | |
700 | } | |
1da177e4 LT |
701 | return res; |
702 | } | |
703 | ||
5eebde23 SJ |
704 | static int |
705 | do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) | |
1da177e4 LT |
706 | { |
707 | struct inode *inode = filp->f_mapping->host; | |
1da177e4 LT |
708 | int status; |
709 | ||
1da177e4 LT |
710 | /* |
711 | * Flush all pending writes before doing anything | |
712 | * with locks.. | |
713 | */ | |
29884df0 | 714 | nfs_sync_mapping(filp->f_mapping); |
1da177e4 LT |
715 | |
716 | /* NOTE: special case | |
717 | * If we're signalled while cleaning up locks on process exit, we | |
718 | * still need to complete the unlock. | |
719 | */ | |
5eebde23 SJ |
720 | /* |
721 | * Use local locking if mounted with "-onolock" or with appropriate | |
722 | * "-olocal_lock=" | |
723 | */ | |
724 | if (!is_local) | |
1da177e4 LT |
725 | status = NFS_PROTO(inode)->lock(filp, cmd, fl); |
726 | else | |
727 | status = do_vfs_lock(filp, fl); | |
1da177e4 LT |
728 | return status; |
729 | } | |
730 | ||
6b96724e RL |
731 | static int |
732 | is_time_granular(struct timespec *ts) { | |
733 | return ((ts->tv_sec == 0) && (ts->tv_nsec <= 1000)); | |
734 | } | |
735 | ||
5eebde23 SJ |
736 | static int |
737 | do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) | |
1da177e4 LT |
738 | { |
739 | struct inode *inode = filp->f_mapping->host; | |
1da177e4 LT |
740 | int status; |
741 | ||
1da177e4 LT |
742 | /* |
743 | * Flush all pending writes before doing anything | |
744 | * with locks.. | |
745 | */ | |
29884df0 TM |
746 | status = nfs_sync_mapping(filp->f_mapping); |
747 | if (status != 0) | |
1da177e4 LT |
748 | goto out; |
749 | ||
5eebde23 SJ |
750 | /* |
751 | * Use local locking if mounted with "-onolock" or with appropriate | |
752 | * "-olocal_lock=" | |
753 | */ | |
754 | if (!is_local) | |
1da177e4 | 755 | status = NFS_PROTO(inode)->lock(filp, cmd, fl); |
c4d7c402 | 756 | else |
1da177e4 | 757 | status = do_vfs_lock(filp, fl); |
1da177e4 LT |
758 | if (status < 0) |
759 | goto out; | |
6b96724e | 760 | |
1da177e4 | 761 | /* |
6b96724e RL |
762 | * Revalidate the cache if the server has time stamps granular |
763 | * enough to detect subsecond changes. Otherwise, clear the | |
764 | * cache to prevent missing any changes. | |
765 | * | |
1da177e4 LT |
766 | * This makes locking act as a cache coherency point. |
767 | */ | |
29884df0 | 768 | nfs_sync_mapping(filp->f_mapping); |
011e2a7f | 769 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) { |
6b96724e RL |
770 | if (is_time_granular(&NFS_SERVER(inode)->time_delta)) |
771 | __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
772 | else | |
773 | nfs_zap_caches(inode); | |
774 | } | |
1da177e4 | 775 | out: |
1da177e4 LT |
776 | return status; |
777 | } | |
778 | ||
779 | /* | |
780 | * Lock a (portion of) a file | |
781 | */ | |
782 | static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) | |
783 | { | |
6da24bc9 | 784 | struct inode *inode = filp->f_mapping->host; |
2116271a | 785 | int ret = -ENOLCK; |
5eebde23 | 786 | int is_local = 0; |
1da177e4 | 787 | |
6da24bc9 CL |
788 | dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n", |
789 | filp->f_path.dentry->d_parent->d_name.name, | |
790 | filp->f_path.dentry->d_name.name, | |
1da177e4 LT |
791 | fl->fl_type, fl->fl_flags, |
792 | (long long)fl->fl_start, (long long)fl->fl_end); | |
6da24bc9 | 793 | |
91d5b470 | 794 | nfs_inc_stats(inode, NFSIOS_VFSLOCK); |
1da177e4 LT |
795 | |
796 | /* No mandatory locks over NFS */ | |
dfad9441 | 797 | if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) |
2116271a TM |
798 | goto out_err; |
799 | ||
5eebde23 SJ |
800 | if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL) |
801 | is_local = 1; | |
802 | ||
2116271a TM |
803 | if (NFS_PROTO(inode)->lock_check_bounds != NULL) { |
804 | ret = NFS_PROTO(inode)->lock_check_bounds(fl); | |
805 | if (ret < 0) | |
806 | goto out_err; | |
807 | } | |
1da177e4 LT |
808 | |
809 | if (IS_GETLK(cmd)) | |
5eebde23 | 810 | ret = do_getlk(filp, cmd, fl, is_local); |
2116271a | 811 | else if (fl->fl_type == F_UNLCK) |
5eebde23 | 812 | ret = do_unlk(filp, cmd, fl, is_local); |
2116271a | 813 | else |
5eebde23 | 814 | ret = do_setlk(filp, cmd, fl, is_local); |
2116271a TM |
815 | out_err: |
816 | return ret; | |
1da177e4 LT |
817 | } |
818 | ||
819 | /* | |
820 | * Lock a (portion of) a file | |
821 | */ | |
822 | static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) | |
823 | { | |
5eebde23 SJ |
824 | struct inode *inode = filp->f_mapping->host; |
825 | int is_local = 0; | |
826 | ||
6da24bc9 CL |
827 | dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n", |
828 | filp->f_path.dentry->d_parent->d_name.name, | |
829 | filp->f_path.dentry->d_name.name, | |
1da177e4 LT |
830 | fl->fl_type, fl->fl_flags); |
831 | ||
1da177e4 LT |
832 | if (!(fl->fl_flags & FL_FLOCK)) |
833 | return -ENOLCK; | |
834 | ||
5eebde23 SJ |
835 | if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK) |
836 | is_local = 1; | |
837 | ||
1da177e4 LT |
838 | /* We're simulating flock() locks using posix locks on the server */ |
839 | fl->fl_owner = (fl_owner_t)filp; | |
840 | fl->fl_start = 0; | |
841 | fl->fl_end = OFFSET_MAX; | |
842 | ||
843 | if (fl->fl_type == F_UNLCK) | |
5eebde23 SJ |
844 | return do_unlk(filp, cmd, fl, is_local); |
845 | return do_setlk(filp, cmd, fl, is_local); | |
1da177e4 | 846 | } |
370f6599 | 847 | |
6da24bc9 CL |
848 | /* |
849 | * There is no protocol support for leases, so we have no way to implement | |
850 | * them correctly in the face of opens by other clients. | |
851 | */ | |
370f6599 BF |
852 | static int nfs_setlease(struct file *file, long arg, struct file_lock **fl) |
853 | { | |
6da24bc9 CL |
854 | dprintk("NFS: setlease(%s/%s, arg=%ld)\n", |
855 | file->f_path.dentry->d_parent->d_name.name, | |
856 | file->f_path.dentry->d_name.name, arg); | |
370f6599 BF |
857 | return -EINVAL; |
858 | } | |
1788ea6e | 859 | |
0486958f JL |
860 | const struct file_operations nfs_file_operations = { |
861 | .llseek = nfs_file_llseek, | |
862 | .read = do_sync_read, | |
863 | .write = do_sync_write, | |
864 | .aio_read = nfs_file_read, | |
865 | .aio_write = nfs_file_write, | |
866 | .mmap = nfs_file_mmap, | |
867 | .open = nfs_file_open, | |
868 | .flush = nfs_file_flush, | |
869 | .release = nfs_file_release, | |
870 | .fsync = nfs_file_fsync, | |
871 | .lock = nfs_lock, | |
872 | .flock = nfs_flock, | |
873 | .splice_read = nfs_file_splice_read, | |
874 | .splice_write = nfs_file_splice_write, | |
875 | .check_flags = nfs_check_flags, | |
876 | .setlease = nfs_setlease, | |
877 | }; | |
878 | ||
1788ea6e JL |
879 | #ifdef CONFIG_NFS_V4 |
880 | static int | |
881 | nfs4_file_open(struct inode *inode, struct file *filp) | |
882 | { | |
0ef97dcf MS |
883 | struct nfs_open_context *ctx; |
884 | struct dentry *dentry = filp->f_path.dentry; | |
885 | struct dentry *parent = NULL; | |
886 | struct inode *dir; | |
887 | unsigned openflags = filp->f_flags; | |
888 | struct iattr attr; | |
889 | int err; | |
890 | ||
891 | BUG_ON(inode != dentry->d_inode); | |
1788ea6e | 892 | /* |
0ef97dcf MS |
893 | * If no cached dentry exists or if it's negative, NFSv4 handled the |
894 | * opens in ->lookup() or ->create(). | |
895 | * | |
896 | * We only get this far for a cached positive dentry. We skipped | |
897 | * revalidation, so handle it here by dropping the dentry and returning | |
898 | * -EOPENSTALE. The VFS will retry the lookup/create/open. | |
1788ea6e | 899 | */ |
0ef97dcf MS |
900 | |
901 | dprintk("NFS: open file(%s/%s)\n", | |
902 | dentry->d_parent->d_name.name, | |
903 | dentry->d_name.name); | |
904 | ||
905 | if ((openflags & O_ACCMODE) == 3) | |
906 | openflags--; | |
907 | ||
908 | /* We can't create new files here */ | |
909 | openflags &= ~(O_CREAT|O_EXCL); | |
910 | ||
911 | parent = dget_parent(dentry); | |
912 | dir = parent->d_inode; | |
913 | ||
914 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); | |
915 | err = PTR_ERR(ctx); | |
916 | if (IS_ERR(ctx)) | |
917 | goto out; | |
918 | ||
919 | attr.ia_valid = ATTR_OPEN; | |
920 | if (openflags & O_TRUNC) { | |
921 | attr.ia_valid |= ATTR_SIZE; | |
922 | attr.ia_size = 0; | |
923 | nfs_wb_all(inode); | |
924 | } | |
925 | ||
926 | inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr); | |
927 | if (IS_ERR(inode)) { | |
928 | err = PTR_ERR(inode); | |
929 | switch (err) { | |
930 | case -EPERM: | |
931 | case -EACCES: | |
932 | case -EDQUOT: | |
933 | case -ENOSPC: | |
934 | case -EROFS: | |
935 | goto out_put_ctx; | |
936 | default: | |
937 | goto out_drop; | |
938 | } | |
939 | } | |
940 | iput(inode); | |
941 | if (inode != dentry->d_inode) | |
942 | goto out_drop; | |
943 | ||
944 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); | |
945 | nfs_file_set_open_context(filp, ctx); | |
946 | err = 0; | |
947 | ||
948 | out_put_ctx: | |
949 | put_nfs_open_context(ctx); | |
950 | out: | |
951 | dput(parent); | |
952 | return err; | |
953 | ||
954 | out_drop: | |
955 | d_drop(dentry); | |
956 | err = -EOPENSTALE; | |
957 | goto out_put_ctx; | |
1788ea6e JL |
958 | } |
959 | ||
a5c58892 BS |
960 | static int |
961 | nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) | |
962 | { | |
963 | int ret; | |
964 | struct inode *inode = file->f_path.dentry->d_inode; | |
965 | ||
966 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); | |
967 | mutex_lock(&inode->i_mutex); | |
968 | ret = nfs_file_fsync_commit(file, start, end, datasync); | |
969 | if (!ret && !datasync) | |
970 | /* application has asked for meta-data sync */ | |
971 | ret = pnfs_layoutcommit_inode(inode, true); | |
972 | mutex_unlock(&inode->i_mutex); | |
973 | ||
974 | return ret; | |
975 | } | |
976 | ||
1788ea6e JL |
977 | const struct file_operations nfs4_file_operations = { |
978 | .llseek = nfs_file_llseek, | |
979 | .read = do_sync_read, | |
980 | .write = do_sync_write, | |
981 | .aio_read = nfs_file_read, | |
982 | .aio_write = nfs_file_write, | |
983 | .mmap = nfs_file_mmap, | |
984 | .open = nfs4_file_open, | |
985 | .flush = nfs_file_flush, | |
986 | .release = nfs_file_release, | |
a5c58892 | 987 | .fsync = nfs4_file_fsync, |
1788ea6e JL |
988 | .lock = nfs_lock, |
989 | .flock = nfs_flock, | |
990 | .splice_read = nfs_file_splice_read, | |
991 | .splice_write = nfs_file_splice_write, | |
992 | .check_flags = nfs_check_flags, | |
993 | .setlease = nfs_setlease, | |
994 | }; | |
995 | #endif /* CONFIG_NFS_V4 */ |