Commit | Line | Data |
---|---|---|
e69e7fe5 EVH |
1 | /* |
2 | * linux/fs/9p/vfs_file.c | |
3 | * | |
4 | * This file contians vfs file ops for 9P2000. | |
5 | * | |
6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
42e8c509 EVH |
10 | * it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation. | |
e69e7fe5 EVH |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
914e2637 | 29 | #include <linux/sched.h> |
e69e7fe5 EVH |
30 | #include <linux/file.h> |
31 | #include <linux/stat.h> | |
32 | #include <linux/string.h> | |
e69e7fe5 | 33 | #include <linux/inet.h> |
e69e7fe5 | 34 | #include <linux/list.h> |
637d020a | 35 | #include <linux/pagemap.h> |
a099027c | 36 | #include <linux/utsname.h> |
e69e7fe5 EVH |
37 | #include <asm/uaccess.h> |
38 | #include <linux/idr.h> | |
bd238fb4 LI |
39 | #include <net/9p/9p.h> |
40 | #include <net/9p/client.h> | |
e69e7fe5 | 41 | |
e69e7fe5 | 42 | #include "v9fs.h" |
e69e7fe5 EVH |
43 | #include "v9fs_vfs.h" |
44 | #include "fid.h" | |
60e78d2c | 45 | #include "cache.h" |
e69e7fe5 | 46 | |
7263cebe AK |
47 | static const struct vm_operations_struct v9fs_file_vm_ops; |
48 | ||
e69e7fe5 EVH |
49 | /** |
50 | * v9fs_file_open - open a file (or directory) | |
51 | * @inode: inode to be opened | |
52 | * @file: file being opened | |
53 | * | |
54 | */ | |
55 | ||
56 | int v9fs_file_open(struct inode *inode, struct file *file) | |
57 | { | |
6a3124a3 | 58 | int err; |
bd238fb4 LI |
59 | struct v9fs_session_info *v9ses; |
60 | struct p9_fid *fid; | |
61 | int omode; | |
e69e7fe5 | 62 | |
ef56547e | 63 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file); |
bd238fb4 | 64 | v9ses = v9fs_inode2v9ses(inode); |
ef56547e MK |
65 | if (v9fs_proto_dotl(v9ses)) |
66 | omode = file->f_flags; | |
67 | else | |
68 | omode = v9fs_uflags2omode(file->f_flags, | |
69 | v9fs_proto_dotu(v9ses)); | |
bd238fb4 LI |
70 | fid = file->private_data; |
71 | if (!fid) { | |
72 | fid = v9fs_fid_clone(file->f_path.dentry); | |
73 | if (IS_ERR(fid)) | |
74 | return PTR_ERR(fid); | |
75 | ||
76 | err = p9_client_open(fid, omode); | |
9523a841 | 77 | if (err < 0) { |
bd238fb4 LI |
78 | p9_client_clunk(fid); |
79 | return err; | |
80 | } | |
ef56547e | 81 | if (file->f_flags & O_TRUNC) { |
7549ae3e | 82 | i_size_write(inode, 0); |
9523a841 EVH |
83 | inode->i_blocks = 0; |
84 | } | |
ef56547e MK |
85 | if ((file->f_flags & O_APPEND) && |
86 | (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses))) | |
2e4bef41 | 87 | generic_file_llseek(file, 0, SEEK_END); |
6a3124a3 | 88 | } |
e69e7fe5 | 89 | |
bd238fb4 | 90 | file->private_data = fid; |
3cf387d7 AK |
91 | if (v9ses->cache && !inode->i_private) { |
92 | /* | |
93 | * clone a fid and add it to inode->i_private | |
94 | * we do it during open time instead of | |
95 | * page dirty time via write_begin/page_mkwrite | |
96 | * because we want write after unlink usecase | |
97 | * to work. | |
98 | */ | |
99 | fid = v9fs_writeback_fid(file->f_path.dentry); | |
100 | if (IS_ERR(fid)) { | |
101 | err = PTR_ERR(fid); | |
102 | goto out_error; | |
103 | } | |
104 | inode->i_private = (void *) fid; | |
105 | } | |
29236f4e | 106 | #ifdef CONFIG_9P_FSCACHE |
46848de0 | 107 | if (v9ses->cache) |
60e78d2c | 108 | v9fs_cache_inode_set_cookie(inode, file); |
29236f4e | 109 | #endif |
6a3124a3 | 110 | return 0; |
3cf387d7 AK |
111 | out_error: |
112 | p9_client_clunk(file->private_data); | |
113 | file->private_data = NULL; | |
114 | return err; | |
e69e7fe5 EVH |
115 | } |
116 | ||
117 | /** | |
118 | * v9fs_file_lock - lock a file (or directory) | |
ee443996 EVH |
119 | * @filp: file to be locked |
120 | * @cmd: lock command | |
121 | * @fl: file lock structure | |
e69e7fe5 | 122 | * |
ee443996 | 123 | * Bugs: this looks like a local only lock, we should extend into 9P |
e69e7fe5 EVH |
124 | * by using open exclusive |
125 | */ | |
126 | ||
127 | static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl) | |
128 | { | |
129 | int res = 0; | |
d6f787bc | 130 | struct inode *inode = filp->f_path.dentry->d_inode; |
e69e7fe5 | 131 | |
bd238fb4 | 132 | P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl); |
e69e7fe5 EVH |
133 | |
134 | /* No mandatory locks */ | |
f78233dd | 135 | if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) |
e69e7fe5 EVH |
136 | return -ENOLCK; |
137 | ||
138 | if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { | |
28fd1298 | 139 | filemap_write_and_wait(inode->i_mapping); |
fc0ecff6 | 140 | invalidate_mapping_pages(&inode->i_data, 0, -1); |
e69e7fe5 EVH |
141 | } |
142 | ||
143 | return res; | |
144 | } | |
145 | ||
a099027c MK |
146 | static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl) |
147 | { | |
148 | struct p9_flock flock; | |
149 | struct p9_fid *fid; | |
150 | uint8_t status; | |
151 | int res = 0; | |
152 | unsigned char fl_type; | |
153 | ||
154 | fid = filp->private_data; | |
155 | BUG_ON(fid == NULL); | |
156 | ||
157 | if ((fl->fl_flags & FL_POSIX) != FL_POSIX) | |
158 | BUG(); | |
159 | ||
160 | res = posix_lock_file_wait(filp, fl); | |
161 | if (res < 0) | |
162 | goto out; | |
163 | ||
164 | /* convert posix lock to p9 tlock args */ | |
165 | memset(&flock, 0, sizeof(flock)); | |
166 | flock.type = fl->fl_type; | |
167 | flock.start = fl->fl_start; | |
168 | if (fl->fl_end == OFFSET_MAX) | |
169 | flock.length = 0; | |
170 | else | |
171 | flock.length = fl->fl_end - fl->fl_start + 1; | |
172 | flock.proc_id = fl->fl_pid; | |
173 | flock.client_id = utsname()->nodename; | |
174 | if (IS_SETLKW(cmd)) | |
175 | flock.flags = P9_LOCK_FLAGS_BLOCK; | |
176 | ||
177 | /* | |
178 | * if its a blocked request and we get P9_LOCK_BLOCKED as the status | |
179 | * for lock request, keep on trying | |
180 | */ | |
181 | for (;;) { | |
182 | res = p9_client_lock_dotl(fid, &flock, &status); | |
183 | if (res < 0) | |
184 | break; | |
185 | ||
186 | if (status != P9_LOCK_BLOCKED) | |
187 | break; | |
188 | if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd)) | |
189 | break; | |
190 | schedule_timeout_interruptible(P9_LOCK_TIMEOUT); | |
191 | } | |
192 | ||
193 | /* map 9p status to VFS status */ | |
194 | switch (status) { | |
195 | case P9_LOCK_SUCCESS: | |
196 | res = 0; | |
197 | break; | |
198 | case P9_LOCK_BLOCKED: | |
199 | res = -EAGAIN; | |
200 | break; | |
201 | case P9_LOCK_ERROR: | |
202 | case P9_LOCK_GRACE: | |
203 | res = -ENOLCK; | |
204 | break; | |
205 | default: | |
206 | BUG(); | |
207 | } | |
208 | ||
209 | /* | |
210 | * incase server returned error for lock request, revert | |
211 | * it locally | |
212 | */ | |
213 | if (res < 0 && fl->fl_type != F_UNLCK) { | |
214 | fl_type = fl->fl_type; | |
215 | fl->fl_type = F_UNLCK; | |
216 | res = posix_lock_file_wait(filp, fl); | |
217 | fl->fl_type = fl_type; | |
218 | } | |
219 | out: | |
220 | return res; | |
221 | } | |
222 | ||
1d769cd1 MK |
223 | static int v9fs_file_getlock(struct file *filp, struct file_lock *fl) |
224 | { | |
225 | struct p9_getlock glock; | |
226 | struct p9_fid *fid; | |
227 | int res = 0; | |
228 | ||
229 | fid = filp->private_data; | |
230 | BUG_ON(fid == NULL); | |
231 | ||
232 | posix_test_lock(filp, fl); | |
233 | /* | |
234 | * if we have a conflicting lock locally, no need to validate | |
235 | * with server | |
236 | */ | |
237 | if (fl->fl_type != F_UNLCK) | |
238 | return res; | |
239 | ||
240 | /* convert posix lock to p9 tgetlock args */ | |
241 | memset(&glock, 0, sizeof(glock)); | |
242 | glock.type = fl->fl_type; | |
243 | glock.start = fl->fl_start; | |
244 | if (fl->fl_end == OFFSET_MAX) | |
245 | glock.length = 0; | |
246 | else | |
247 | glock.length = fl->fl_end - fl->fl_start + 1; | |
248 | glock.proc_id = fl->fl_pid; | |
249 | glock.client_id = utsname()->nodename; | |
250 | ||
251 | res = p9_client_getlock_dotl(fid, &glock); | |
252 | if (res < 0) | |
253 | return res; | |
254 | if (glock.type != F_UNLCK) { | |
255 | fl->fl_type = glock.type; | |
256 | fl->fl_start = glock.start; | |
257 | if (glock.length == 0) | |
258 | fl->fl_end = OFFSET_MAX; | |
259 | else | |
260 | fl->fl_end = glock.start + glock.length - 1; | |
261 | fl->fl_pid = glock.proc_id; | |
262 | } else | |
263 | fl->fl_type = F_UNLCK; | |
264 | ||
265 | return res; | |
266 | } | |
267 | ||
a099027c MK |
268 | /** |
269 | * v9fs_file_lock_dotl - lock a file (or directory) | |
270 | * @filp: file to be locked | |
271 | * @cmd: lock command | |
272 | * @fl: file lock structure | |
273 | * | |
274 | */ | |
275 | ||
276 | static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl) | |
277 | { | |
278 | struct inode *inode = filp->f_path.dentry->d_inode; | |
279 | int ret = -ENOLCK; | |
280 | ||
281 | P9_DPRINTK(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n", filp, | |
282 | cmd, fl, filp->f_path.dentry->d_name.name); | |
283 | ||
284 | /* No mandatory locks */ | |
285 | if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) | |
286 | goto out_err; | |
287 | ||
288 | if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { | |
289 | filemap_write_and_wait(inode->i_mapping); | |
290 | invalidate_mapping_pages(&inode->i_data, 0, -1); | |
291 | } | |
292 | ||
293 | if (IS_SETLK(cmd) || IS_SETLKW(cmd)) | |
294 | ret = v9fs_file_do_lock(filp, cmd, fl); | |
1d769cd1 MK |
295 | else if (IS_GETLK(cmd)) |
296 | ret = v9fs_file_getlock(filp, fl); | |
a099027c MK |
297 | else |
298 | ret = -EINVAL; | |
299 | out_err: | |
300 | return ret; | |
301 | } | |
302 | ||
303 | /** | |
304 | * v9fs_file_flock_dotl - lock a file | |
305 | * @filp: file to be locked | |
306 | * @cmd: lock command | |
307 | * @fl: file lock structure | |
308 | * | |
309 | */ | |
310 | ||
311 | static int v9fs_file_flock_dotl(struct file *filp, int cmd, | |
312 | struct file_lock *fl) | |
313 | { | |
314 | struct inode *inode = filp->f_path.dentry->d_inode; | |
315 | int ret = -ENOLCK; | |
316 | ||
317 | P9_DPRINTK(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n", filp, | |
318 | cmd, fl, filp->f_path.dentry->d_name.name); | |
319 | ||
320 | /* No mandatory locks */ | |
321 | if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) | |
322 | goto out_err; | |
323 | ||
324 | if (!(fl->fl_flags & FL_FLOCK)) | |
325 | goto out_err; | |
326 | ||
327 | if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { | |
328 | filemap_write_and_wait(inode->i_mapping); | |
329 | invalidate_mapping_pages(&inode->i_data, 0, -1); | |
330 | } | |
331 | /* Convert flock to posix lock */ | |
332 | fl->fl_owner = (fl_owner_t)filp; | |
333 | fl->fl_start = 0; | |
334 | fl->fl_end = OFFSET_MAX; | |
335 | fl->fl_flags |= FL_POSIX; | |
336 | fl->fl_flags ^= FL_FLOCK; | |
337 | ||
338 | if (IS_SETLK(cmd) | IS_SETLKW(cmd)) | |
339 | ret = v9fs_file_do_lock(filp, cmd, fl); | |
340 | else | |
341 | ret = -EINVAL; | |
342 | out_err: | |
343 | return ret; | |
344 | } | |
345 | ||
e69e7fe5 | 346 | /** |
17311779 AK |
347 | * v9fs_fid_readn - read from a fid |
348 | * @fid: fid to read | |
e69e7fe5 | 349 | * @data: data buffer to read data into |
fbedadc1 | 350 | * @udata: user data buffer to read data into |
e69e7fe5 EVH |
351 | * @count: size of buffer |
352 | * @offset: offset at which to read data | |
353 | * | |
354 | */ | |
fbedadc1 | 355 | ssize_t |
17311779 | 356 | v9fs_fid_readn(struct p9_fid *fid, char *data, char __user *udata, u32 count, |
fbedadc1 EVH |
357 | u64 offset) |
358 | { | |
97e8442b | 359 | int n, total, size; |
fbedadc1 | 360 | |
51a87c55 | 361 | P9_DPRINTK(P9_DEBUG_VFS, "fid %d offset %llu count %d\n", fid->fid, |
17311779 | 362 | (long long unsigned) offset, count); |
fbedadc1 EVH |
363 | n = 0; |
364 | total = 0; | |
97e8442b | 365 | size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ; |
fbedadc1 EVH |
366 | do { |
367 | n = p9_client_read(fid, data, udata, offset, count); | |
368 | if (n <= 0) | |
369 | break; | |
370 | ||
371 | if (data) | |
372 | data += n; | |
373 | if (udata) | |
374 | udata += n; | |
375 | ||
376 | offset += n; | |
377 | count -= n; | |
378 | total += n; | |
97e8442b | 379 | } while (count > 0 && n == size); |
fbedadc1 EVH |
380 | |
381 | if (n < 0) | |
382 | total = n; | |
383 | ||
384 | return total; | |
385 | } | |
386 | ||
17311779 AK |
387 | /** |
388 | * v9fs_file_readn - read from a file | |
389 | * @filp: file pointer to read | |
390 | * @data: data buffer to read data into | |
391 | * @udata: user data buffer to read data into | |
392 | * @count: size of buffer | |
393 | * @offset: offset at which to read data | |
394 | * | |
395 | */ | |
396 | ssize_t | |
397 | v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count, | |
398 | u64 offset) | |
399 | { | |
400 | return v9fs_fid_readn(filp->private_data, data, udata, count, offset); | |
401 | } | |
402 | ||
fbedadc1 EVH |
403 | /** |
404 | * v9fs_file_read - read from a file | |
405 | * @filp: file pointer to read | |
406 | * @udata: user data buffer to read data into | |
407 | * @count: size of buffer | |
408 | * @offset: offset at which to read data | |
409 | * | |
410 | */ | |
411 | ||
e69e7fe5 | 412 | static ssize_t |
fbedadc1 | 413 | v9fs_file_read(struct file *filp, char __user *udata, size_t count, |
19cba8ab | 414 | loff_t * offset) |
e69e7fe5 | 415 | { |
bd238fb4 LI |
416 | int ret; |
417 | struct p9_fid *fid; | |
97e8442b | 418 | size_t size; |
e69e7fe5 | 419 | |
ea2e7996 | 420 | P9_DPRINTK(P9_DEBUG_VFS, "count %zu offset %lld\n", count, *offset); |
bd238fb4 | 421 | fid = filp->private_data; |
fbedadc1 | 422 | |
97e8442b MK |
423 | size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ; |
424 | if (count > size) | |
fbedadc1 EVH |
425 | ret = v9fs_file_readn(filp, NULL, udata, count, *offset); |
426 | else | |
427 | ret = p9_client_read(fid, NULL, udata, *offset, count); | |
428 | ||
bd238fb4 LI |
429 | if (ret > 0) |
430 | *offset += ret; | |
e69e7fe5 | 431 | |
bd238fb4 | 432 | return ret; |
e69e7fe5 EVH |
433 | } |
434 | ||
17311779 AK |
435 | ssize_t |
436 | v9fs_file_write_internal(struct inode *inode, struct p9_fid *fid, | |
437 | const char __user *data, size_t count, | |
438 | loff_t *offset, int invalidate) | |
e69e7fe5 | 439 | { |
8d40fa24 | 440 | int n; |
17311779 | 441 | size_t total = 0; |
dfb0ec2e | 442 | struct p9_client *clnt; |
fc0f2961 | 443 | loff_t origin = *offset; |
637d020a | 444 | unsigned long pg_start, pg_end; |
e69e7fe5 | 445 | |
bd238fb4 LI |
446 | P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data, |
447 | (int)count, (int)*offset); | |
e69e7fe5 | 448 | |
dfb0ec2e | 449 | clnt = fid->clnt; |
dfb0ec2e | 450 | do { |
8d40fa24 | 451 | n = p9_client_write(fid, NULL, data+total, origin+total, count); |
dfb0ec2e EVH |
452 | if (n <= 0) |
453 | break; | |
454 | count -= n; | |
455 | total += n; | |
456 | } while (count > 0); | |
457 | ||
17311779 | 458 | if (invalidate && (total > 0)) { |
637d020a AK |
459 | pg_start = origin >> PAGE_CACHE_SHIFT; |
460 | pg_end = (origin + total - 1) >> PAGE_CACHE_SHIFT; | |
60e78d2c AK |
461 | if (inode->i_mapping && inode->i_mapping->nrpages) |
462 | invalidate_inode_pages2_range(inode->i_mapping, | |
463 | pg_start, pg_end); | |
dfb0ec2e | 464 | *offset += total; |
637d020a | 465 | i_size_write(inode, i_size_read(inode) + total); |
7549ae3e | 466 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
9523a841 | 467 | } |
dfb0ec2e | 468 | if (n < 0) |
17311779 AK |
469 | return n; |
470 | ||
471 | return total; | |
472 | } | |
473 | ||
474 | /** | |
475 | * v9fs_file_write - write to a file | |
476 | * @filp: file pointer to write | |
477 | * @data: data buffer to write data from | |
478 | * @count: size of buffer | |
479 | * @offset: offset at which to write data | |
480 | * | |
481 | */ | |
482 | static ssize_t | |
483 | v9fs_file_write(struct file *filp, const char __user * data, | |
484 | size_t count, loff_t *offset) | |
485 | { | |
486 | ssize_t retval = 0; | |
487 | loff_t origin = *offset; | |
488 | ||
489 | ||
490 | retval = generic_write_checks(filp, &origin, &count, 0); | |
491 | if (retval) | |
492 | goto out; | |
493 | ||
494 | retval = -EINVAL; | |
495 | if ((ssize_t) count < 0) | |
496 | goto out; | |
497 | retval = 0; | |
498 | if (!count) | |
499 | goto out; | |
500 | ||
501 | return v9fs_file_write_internal(filp->f_path.dentry->d_inode, | |
502 | filp->private_data, | |
503 | data, count, offset, 1); | |
3834b12a HPB |
504 | out: |
505 | return retval; | |
e69e7fe5 EVH |
506 | } |
507 | ||
7263cebe | 508 | |
7ea80859 | 509 | static int v9fs_file_fsync(struct file *filp, int datasync) |
7a4439c4 MK |
510 | { |
511 | struct p9_fid *fid; | |
512 | struct p9_wstat wstat; | |
513 | int retval; | |
514 | ||
7ea80859 | 515 | P9_DPRINTK(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync); |
7a4439c4 MK |
516 | |
517 | fid = filp->private_data; | |
518 | v9fs_blank_wstat(&wstat); | |
519 | ||
520 | retval = p9_client_wstat(fid, &wstat); | |
521 | return retval; | |
522 | } | |
523 | ||
b165d601 | 524 | int v9fs_file_fsync_dotl(struct file *filp, int datasync) |
920e65dc VJJ |
525 | { |
526 | struct p9_fid *fid; | |
527 | int retval; | |
528 | ||
529 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_file_fsync_dotl: filp %p datasync %x\n", | |
530 | filp, datasync); | |
531 | ||
532 | fid = filp->private_data; | |
533 | ||
b165d601 | 534 | retval = p9_client_fsync(fid, datasync); |
920e65dc VJJ |
535 | return retval; |
536 | } | |
537 | ||
7263cebe AK |
538 | static int |
539 | v9fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
540 | { | |
541 | int retval; | |
542 | ||
543 | retval = generic_file_mmap(file, vma); | |
544 | if (!retval) | |
545 | vma->vm_ops = &v9fs_file_vm_ops; | |
546 | ||
547 | return retval; | |
548 | } | |
549 | ||
550 | static int | |
551 | v9fs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) | |
552 | { | |
553 | struct page *page = vmf->page; | |
554 | struct file *filp = vma->vm_file; | |
555 | struct inode *inode = filp->f_path.dentry->d_inode; | |
556 | ||
557 | ||
558 | P9_DPRINTK(P9_DEBUG_VFS, "page %p fid %lx\n", | |
559 | page, (unsigned long)filp->private_data); | |
560 | ||
561 | /* make sure the cache has finished storing the page */ | |
562 | v9fs_fscache_wait_on_page_write(inode, page); | |
563 | BUG_ON(!inode->i_private); | |
564 | lock_page(page); | |
565 | if (page->mapping != inode->i_mapping) | |
566 | goto out_unlock; | |
567 | ||
568 | return VM_FAULT_LOCKED; | |
569 | out_unlock: | |
570 | unlock_page(page); | |
571 | return VM_FAULT_NOPAGE; | |
572 | } | |
573 | ||
574 | static const struct vm_operations_struct v9fs_file_vm_ops = { | |
575 | .fault = filemap_fault, | |
576 | .page_mkwrite = v9fs_vm_page_mkwrite, | |
577 | }; | |
578 | ||
29236f4e | 579 | const struct file_operations v9fs_cached_file_operations = { |
e03abc0c EVH |
580 | .llseek = generic_file_llseek, |
581 | .read = do_sync_read, | |
7263cebe | 582 | .write = do_sync_write, |
e03abc0c | 583 | .aio_read = generic_file_aio_read, |
7263cebe | 584 | .aio_write = generic_file_aio_write, |
e03abc0c EVH |
585 | .open = v9fs_file_open, |
586 | .release = v9fs_dir_release, | |
587 | .lock = v9fs_file_lock, | |
7263cebe | 588 | .mmap = v9fs_file_mmap, |
7a4439c4 | 589 | .fsync = v9fs_file_fsync, |
e03abc0c EVH |
590 | }; |
591 | ||
29236f4e | 592 | const struct file_operations v9fs_cached_file_operations_dotl = { |
b04faaf3 VJJ |
593 | .llseek = generic_file_llseek, |
594 | .read = do_sync_read, | |
7263cebe | 595 | .write = do_sync_write, |
b04faaf3 | 596 | .aio_read = generic_file_aio_read, |
7263cebe | 597 | .aio_write = generic_file_aio_write, |
b04faaf3 VJJ |
598 | .open = v9fs_file_open, |
599 | .release = v9fs_dir_release, | |
a099027c MK |
600 | .lock = v9fs_file_lock_dotl, |
601 | .flock = v9fs_file_flock_dotl, | |
7263cebe | 602 | .mmap = v9fs_file_mmap, |
920e65dc | 603 | .fsync = v9fs_file_fsync_dotl, |
b04faaf3 VJJ |
604 | }; |
605 | ||
4b6f5d20 | 606 | const struct file_operations v9fs_file_operations = { |
e69e7fe5 EVH |
607 | .llseek = generic_file_llseek, |
608 | .read = v9fs_file_read, | |
609 | .write = v9fs_file_write, | |
610 | .open = v9fs_file_open, | |
611 | .release = v9fs_dir_release, | |
612 | .lock = v9fs_file_lock, | |
14b8869f | 613 | .mmap = generic_file_readonly_mmap, |
7a4439c4 | 614 | .fsync = v9fs_file_fsync, |
e69e7fe5 | 615 | }; |
9b6533c9 SK |
616 | |
617 | const struct file_operations v9fs_file_operations_dotl = { | |
618 | .llseek = generic_file_llseek, | |
619 | .read = v9fs_file_read, | |
620 | .write = v9fs_file_write, | |
621 | .open = v9fs_file_open, | |
622 | .release = v9fs_dir_release, | |
a099027c MK |
623 | .lock = v9fs_file_lock_dotl, |
624 | .flock = v9fs_file_flock_dotl, | |
9b6533c9 | 625 | .mmap = generic_file_readonly_mmap, |
920e65dc | 626 | .fsync = v9fs_file_fsync_dotl, |
9b6533c9 | 627 | }; |