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Commit | Line | Data |
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1efb473f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright (c) 2011, Lawrence Livermore National Security, LLC. | |
5475aada | 23 | * Copyright (c) 2015 by Chunwei Chen. All rights reserved. |
1efb473f BB |
24 | */ |
25 | ||
26 | ||
f7b939bd CIK |
27 | #ifdef CONFIG_COMPAT |
28 | #include <linux/compat.h> | |
29 | #endif | |
93ce2b4c | 30 | #include <sys/file.h> |
119a394a | 31 | #include <sys/dmu_objset.h> |
1efb473f BB |
32 | #include <sys/zfs_vfsops.h> |
33 | #include <sys/zfs_vnops.h> | |
34 | #include <sys/zfs_znode.h> | |
9c5167d1 | 35 | #include <sys/zfs_project.h> |
1efb473f BB |
36 | |
37 | ||
126400a1 BB |
38 | static int |
39 | zpl_open(struct inode *ip, struct file *filp) | |
40 | { | |
81e97e21 | 41 | cred_t *cr = CRED(); |
126400a1 | 42 | int error; |
40d06e3c | 43 | fstrans_cookie_t cookie; |
126400a1 | 44 | |
7dc71949 CC |
45 | error = generic_file_open(ip, filp); |
46 | if (error) | |
47 | return (error); | |
48 | ||
81e97e21 | 49 | crhold(cr); |
40d06e3c | 50 | cookie = spl_fstrans_mark(); |
126400a1 | 51 | error = -zfs_open(ip, filp->f_mode, filp->f_flags, cr); |
40d06e3c | 52 | spl_fstrans_unmark(cookie); |
81e97e21 | 53 | crfree(cr); |
126400a1 BB |
54 | ASSERT3S(error, <=, 0); |
55 | ||
7dc71949 | 56 | return (error); |
126400a1 BB |
57 | } |
58 | ||
59 | static int | |
60 | zpl_release(struct inode *ip, struct file *filp) | |
61 | { | |
81e97e21 | 62 | cred_t *cr = CRED(); |
126400a1 | 63 | int error; |
40d06e3c | 64 | fstrans_cookie_t cookie; |
126400a1 | 65 | |
40d06e3c | 66 | cookie = spl_fstrans_mark(); |
78d7a5d7 | 67 | if (ITOZ(ip)->z_atime_dirty) |
1e8db771 | 68 | zfs_mark_inode_dirty(ip); |
78d7a5d7 | 69 | |
81e97e21 | 70 | crhold(cr); |
126400a1 | 71 | error = -zfs_close(ip, filp->f_flags, cr); |
40d06e3c | 72 | spl_fstrans_unmark(cookie); |
81e97e21 | 73 | crfree(cr); |
126400a1 BB |
74 | ASSERT3S(error, <=, 0); |
75 | ||
76 | return (error); | |
77 | } | |
78 | ||
1efb473f | 79 | static int |
9464b959 | 80 | zpl_iterate(struct file *filp, zpl_dir_context_t *ctx) |
1efb473f | 81 | { |
81e97e21 | 82 | cred_t *cr = CRED(); |
1efb473f | 83 | int error; |
40d06e3c | 84 | fstrans_cookie_t cookie; |
1efb473f | 85 | |
81e97e21 | 86 | crhold(cr); |
40d06e3c | 87 | cookie = spl_fstrans_mark(); |
d9c97ec0 | 88 | error = -zfs_readdir(file_inode(filp), ctx, cr); |
40d06e3c | 89 | spl_fstrans_unmark(cookie); |
81e97e21 | 90 | crfree(cr); |
1efb473f BB |
91 | ASSERT3S(error, <=, 0); |
92 | ||
93 | return (error); | |
94 | } | |
95 | ||
9baaa7de | 96 | #if !defined(HAVE_VFS_ITERATE) && !defined(HAVE_VFS_ITERATE_SHARED) |
0f37d0c8 RY |
97 | static int |
98 | zpl_readdir(struct file *filp, void *dirent, filldir_t filldir) | |
99 | { | |
9464b959 BB |
100 | zpl_dir_context_t ctx = |
101 | ZPL_DIR_CONTEXT_INIT(dirent, filldir, filp->f_pos); | |
0f37d0c8 RY |
102 | int error; |
103 | ||
104 | error = zpl_iterate(filp, &ctx); | |
105 | filp->f_pos = ctx.pos; | |
106 | ||
107 | return (error); | |
108 | } | |
9464b959 | 109 | #endif /* !HAVE_VFS_ITERATE && !HAVE_VFS_ITERATE_SHARED */ |
0f37d0c8 | 110 | |
adcd70bd | 111 | #if defined(HAVE_FSYNC_WITH_DENTRY) |
3117dd0b | 112 | /* |
adcd70bd BB |
113 | * Linux 2.6.x - 2.6.34 API, |
114 | * Through 2.6.34 the nfsd kernel server would pass a NULL 'file struct *' | |
115 | * to the fops->fsync() hook. For this reason, we must be careful not to | |
116 | * use filp unconditionally. | |
117 | */ | |
118 | static int | |
119 | zpl_fsync(struct file *filp, struct dentry *dentry, int datasync) | |
120 | { | |
121 | cred_t *cr = CRED(); | |
122 | int error; | |
40d06e3c | 123 | fstrans_cookie_t cookie; |
adcd70bd BB |
124 | |
125 | crhold(cr); | |
40d06e3c | 126 | cookie = spl_fstrans_mark(); |
adcd70bd | 127 | error = -zfs_fsync(dentry->d_inode, datasync, cr); |
40d06e3c | 128 | spl_fstrans_unmark(cookie); |
adcd70bd BB |
129 | crfree(cr); |
130 | ASSERT3S(error, <=, 0); | |
131 | ||
132 | return (error); | |
133 | } | |
134 | ||
7ca25051 | 135 | #ifdef HAVE_FILE_AIO_FSYNC |
cd3939c5 RY |
136 | static int |
137 | zpl_aio_fsync(struct kiocb *kiocb, int datasync) | |
138 | { | |
139 | struct file *filp = kiocb->ki_filp; | |
d9c97ec0 | 140 | return (zpl_fsync(filp, file_dentry(filp), datasync)); |
cd3939c5 | 141 | } |
7ca25051 D |
142 | #endif |
143 | ||
adcd70bd BB |
144 | #elif defined(HAVE_FSYNC_WITHOUT_DENTRY) |
145 | /* | |
146 | * Linux 2.6.35 - 3.0 API, | |
147 | * As of 2.6.35 the dentry argument to the fops->fsync() hook was deemed | |
3117dd0b BB |
148 | * redundant. The dentry is still accessible via filp->f_path.dentry, |
149 | * and we are guaranteed that filp will never be NULL. | |
3117dd0b | 150 | */ |
3117dd0b BB |
151 | static int |
152 | zpl_fsync(struct file *filp, int datasync) | |
153 | { | |
adcd70bd BB |
154 | struct inode *inode = filp->f_mapping->host; |
155 | cred_t *cr = CRED(); | |
156 | int error; | |
40d06e3c | 157 | fstrans_cookie_t cookie; |
adcd70bd BB |
158 | |
159 | crhold(cr); | |
40d06e3c | 160 | cookie = spl_fstrans_mark(); |
adcd70bd | 161 | error = -zfs_fsync(inode, datasync, cr); |
40d06e3c | 162 | spl_fstrans_unmark(cookie); |
adcd70bd BB |
163 | crfree(cr); |
164 | ASSERT3S(error, <=, 0); | |
165 | ||
166 | return (error); | |
167 | } | |
168 | ||
7ca25051 | 169 | #ifdef HAVE_FILE_AIO_FSYNC |
cd3939c5 RY |
170 | static int |
171 | zpl_aio_fsync(struct kiocb *kiocb, int datasync) | |
172 | { | |
173 | return (zpl_fsync(kiocb->ki_filp, datasync)); | |
174 | } | |
7ca25051 D |
175 | #endif |
176 | ||
adcd70bd BB |
177 | #elif defined(HAVE_FSYNC_RANGE) |
178 | /* | |
179 | * Linux 3.1 - 3.x API, | |
180 | * As of 3.1 the responsibility to call filemap_write_and_wait_range() has | |
181 | * been pushed down in to the .fsync() vfs hook. Additionally, the i_mutex | |
182 | * lock is no longer held by the caller, for zfs we don't require the lock | |
183 | * to be held so we don't acquire it. | |
184 | */ | |
3117dd0b | 185 | static int |
adcd70bd | 186 | zpl_fsync(struct file *filp, loff_t start, loff_t end, int datasync) |
1efb473f | 187 | { |
adcd70bd | 188 | struct inode *inode = filp->f_mapping->host; |
81e97e21 | 189 | cred_t *cr = CRED(); |
1efb473f | 190 | int error; |
40d06e3c | 191 | fstrans_cookie_t cookie; |
1efb473f | 192 | |
adcd70bd BB |
193 | error = filemap_write_and_wait_range(inode->i_mapping, start, end); |
194 | if (error) | |
195 | return (error); | |
196 | ||
81e97e21 | 197 | crhold(cr); |
40d06e3c | 198 | cookie = spl_fstrans_mark(); |
adcd70bd | 199 | error = -zfs_fsync(inode, datasync, cr); |
40d06e3c | 200 | spl_fstrans_unmark(cookie); |
81e97e21 | 201 | crfree(cr); |
1efb473f BB |
202 | ASSERT3S(error, <=, 0); |
203 | ||
204 | return (error); | |
205 | } | |
cd3939c5 | 206 | |
7ca25051 | 207 | #ifdef HAVE_FILE_AIO_FSYNC |
cd3939c5 RY |
208 | static int |
209 | zpl_aio_fsync(struct kiocb *kiocb, int datasync) | |
210 | { | |
57ae8400 | 211 | return (zpl_fsync(kiocb->ki_filp, kiocb->ki_pos, -1, datasync)); |
cd3939c5 | 212 | } |
7ca25051 D |
213 | #endif |
214 | ||
adcd70bd BB |
215 | #else |
216 | #error "Unsupported fops->fsync() implementation" | |
217 | #endif | |
1efb473f | 218 | |
5475aada | 219 | static ssize_t |
cd3939c5 | 220 | zpl_read_common_iovec(struct inode *ip, const struct iovec *iovp, size_t count, |
5475aada CC |
221 | unsigned long nr_segs, loff_t *ppos, uio_seg_t segment, int flags, |
222 | cred_t *cr, size_t skip) | |
1efb473f | 223 | { |
e3dc14b8 | 224 | ssize_t read; |
1efb473f | 225 | uio_t uio; |
cd3939c5 | 226 | int error; |
40d06e3c | 227 | fstrans_cookie_t cookie; |
1efb473f | 228 | |
5475aada CC |
229 | uio.uio_iov = iovp; |
230 | uio.uio_skip = skip; | |
cd3939c5 RY |
231 | uio.uio_resid = count; |
232 | uio.uio_iovcnt = nr_segs; | |
233 | uio.uio_loffset = *ppos; | |
1efb473f BB |
234 | uio.uio_limit = MAXOFFSET_T; |
235 | uio.uio_segflg = segment; | |
236 | ||
40d06e3c | 237 | cookie = spl_fstrans_mark(); |
1efb473f | 238 | error = -zfs_read(ip, &uio, flags, cr); |
40d06e3c | 239 | spl_fstrans_unmark(cookie); |
1efb473f BB |
240 | if (error < 0) |
241 | return (error); | |
242 | ||
cd3939c5 RY |
243 | read = count - uio.uio_resid; |
244 | *ppos += read; | |
e3dc14b8 BB |
245 | task_io_account_read(read); |
246 | ||
247 | return (read); | |
1efb473f BB |
248 | } |
249 | ||
cd3939c5 RY |
250 | inline ssize_t |
251 | zpl_read_common(struct inode *ip, const char *buf, size_t len, loff_t *ppos, | |
252 | uio_seg_t segment, int flags, cred_t *cr) | |
253 | { | |
254 | struct iovec iov; | |
255 | ||
256 | iov.iov_base = (void *)buf; | |
257 | iov.iov_len = len; | |
258 | ||
259 | return (zpl_read_common_iovec(ip, &iov, len, 1, ppos, segment, | |
5475aada | 260 | flags, cr, 0)); |
cd3939c5 RY |
261 | } |
262 | ||
cd3939c5 | 263 | static ssize_t |
57ae8400 | 264 | zpl_iter_read_common(struct kiocb *kiocb, const struct iovec *iovp, |
5475aada | 265 | unsigned long nr_segs, size_t count, uio_seg_t seg, size_t skip) |
cd3939c5 RY |
266 | { |
267 | cred_t *cr = CRED(); | |
268 | struct file *filp = kiocb->ki_filp; | |
cd3939c5 | 269 | ssize_t read; |
cd3939c5 RY |
270 | |
271 | crhold(cr); | |
5475aada CC |
272 | read = zpl_read_common_iovec(filp->f_mapping->host, iovp, count, |
273 | nr_segs, &kiocb->ki_pos, seg, filp->f_flags, cr, skip); | |
cd3939c5 RY |
274 | crfree(cr); |
275 | ||
0df9673f | 276 | file_accessed(filp); |
1efb473f BB |
277 | return (read); |
278 | } | |
279 | ||
57ae8400 MK |
280 | #if defined(HAVE_VFS_RW_ITERATE) |
281 | static ssize_t | |
282 | zpl_iter_read(struct kiocb *kiocb, struct iov_iter *to) | |
283 | { | |
5475aada CC |
284 | ssize_t ret; |
285 | uio_seg_t seg = UIO_USERSPACE; | |
286 | if (to->type & ITER_KVEC) | |
287 | seg = UIO_SYSSPACE; | |
288 | if (to->type & ITER_BVEC) | |
289 | seg = UIO_BVEC; | |
290 | ret = zpl_iter_read_common(kiocb, to->iov, to->nr_segs, | |
291 | iov_iter_count(to), seg, to->iov_offset); | |
292 | if (ret > 0) | |
293 | iov_iter_advance(to, ret); | |
294 | return (ret); | |
57ae8400 MK |
295 | } |
296 | #else | |
297 | static ssize_t | |
298 | zpl_aio_read(struct kiocb *kiocb, const struct iovec *iovp, | |
299 | unsigned long nr_segs, loff_t pos) | |
300 | { | |
933ec999 CC |
301 | ssize_t ret; |
302 | size_t count; | |
303 | ||
304 | ret = generic_segment_checks(iovp, &nr_segs, &count, VERIFY_WRITE); | |
305 | if (ret) | |
306 | return (ret); | |
307 | ||
308 | return (zpl_iter_read_common(kiocb, iovp, nr_segs, count, | |
5475aada | 309 | UIO_USERSPACE, 0)); |
57ae8400 MK |
310 | } |
311 | #endif /* HAVE_VFS_RW_ITERATE */ | |
312 | ||
5475aada | 313 | static ssize_t |
cd3939c5 | 314 | zpl_write_common_iovec(struct inode *ip, const struct iovec *iovp, size_t count, |
5475aada CC |
315 | unsigned long nr_segs, loff_t *ppos, uio_seg_t segment, int flags, |
316 | cred_t *cr, size_t skip) | |
1efb473f | 317 | { |
e3dc14b8 | 318 | ssize_t wrote; |
1efb473f | 319 | uio_t uio; |
cd3939c5 | 320 | int error; |
40d06e3c | 321 | fstrans_cookie_t cookie; |
1efb473f | 322 | |
1efdc45e BB |
323 | if (flags & O_APPEND) |
324 | *ppos = i_size_read(ip); | |
325 | ||
5475aada CC |
326 | uio.uio_iov = iovp; |
327 | uio.uio_skip = skip; | |
cd3939c5 RY |
328 | uio.uio_resid = count; |
329 | uio.uio_iovcnt = nr_segs; | |
330 | uio.uio_loffset = *ppos; | |
1efb473f BB |
331 | uio.uio_limit = MAXOFFSET_T; |
332 | uio.uio_segflg = segment; | |
333 | ||
40d06e3c | 334 | cookie = spl_fstrans_mark(); |
1efb473f | 335 | error = -zfs_write(ip, &uio, flags, cr); |
40d06e3c | 336 | spl_fstrans_unmark(cookie); |
1efb473f BB |
337 | if (error < 0) |
338 | return (error); | |
339 | ||
cd3939c5 RY |
340 | wrote = count - uio.uio_resid; |
341 | *ppos += wrote; | |
e3dc14b8 BB |
342 | task_io_account_write(wrote); |
343 | ||
344 | return (wrote); | |
1efb473f | 345 | } |
933ec999 | 346 | |
cd3939c5 RY |
347 | inline ssize_t |
348 | zpl_write_common(struct inode *ip, const char *buf, size_t len, loff_t *ppos, | |
349 | uio_seg_t segment, int flags, cred_t *cr) | |
350 | { | |
351 | struct iovec iov; | |
352 | ||
353 | iov.iov_base = (void *)buf; | |
354 | iov.iov_len = len; | |
355 | ||
356 | return (zpl_write_common_iovec(ip, &iov, len, 1, ppos, segment, | |
5475aada | 357 | flags, cr, 0)); |
cd3939c5 | 358 | } |
1efb473f | 359 | |
cd3939c5 | 360 | static ssize_t |
57ae8400 | 361 | zpl_iter_write_common(struct kiocb *kiocb, const struct iovec *iovp, |
5475aada | 362 | unsigned long nr_segs, size_t count, uio_seg_t seg, size_t skip) |
cd3939c5 RY |
363 | { |
364 | cred_t *cr = CRED(); | |
365 | struct file *filp = kiocb->ki_filp; | |
cd3939c5 | 366 | ssize_t wrote; |
cd3939c5 RY |
367 | |
368 | crhold(cr); | |
5475aada CC |
369 | wrote = zpl_write_common_iovec(filp->f_mapping->host, iovp, count, |
370 | nr_segs, &kiocb->ki_pos, seg, filp->f_flags, cr, skip); | |
cd3939c5 RY |
371 | crfree(cr); |
372 | ||
1efb473f BB |
373 | return (wrote); |
374 | } | |
375 | ||
57ae8400 MK |
376 | #if defined(HAVE_VFS_RW_ITERATE) |
377 | static ssize_t | |
378 | zpl_iter_write(struct kiocb *kiocb, struct iov_iter *from) | |
379 | { | |
933ec999 | 380 | size_t count; |
5475aada CC |
381 | ssize_t ret; |
382 | uio_seg_t seg = UIO_USERSPACE; | |
933ec999 CC |
383 | |
384 | #ifndef HAVE_GENERIC_WRITE_CHECKS_KIOCB | |
385 | struct file *file = kiocb->ki_filp; | |
386 | struct address_space *mapping = file->f_mapping; | |
387 | struct inode *ip = mapping->host; | |
388 | int isblk = S_ISBLK(ip->i_mode); | |
389 | ||
390 | count = iov_iter_count(from); | |
391 | ret = generic_write_checks(file, &kiocb->ki_pos, &count, isblk); | |
c7af63d6 CC |
392 | if (ret) |
393 | return (ret); | |
933ec999 CC |
394 | #else |
395 | /* | |
396 | * XXX - ideally this check should be in the same lock region with | |
397 | * write operations, so that there's no TOCTTOU race when doing | |
398 | * append and someone else grow the file. | |
399 | */ | |
400 | ret = generic_write_checks(kiocb, from); | |
933ec999 CC |
401 | if (ret <= 0) |
402 | return (ret); | |
c7af63d6 CC |
403 | count = ret; |
404 | #endif | |
933ec999 | 405 | |
5475aada CC |
406 | if (from->type & ITER_KVEC) |
407 | seg = UIO_SYSSPACE; | |
408 | if (from->type & ITER_BVEC) | |
409 | seg = UIO_BVEC; | |
933ec999 | 410 | |
5475aada | 411 | ret = zpl_iter_write_common(kiocb, from->iov, from->nr_segs, |
933ec999 | 412 | count, seg, from->iov_offset); |
5475aada CC |
413 | if (ret > 0) |
414 | iov_iter_advance(from, ret); | |
933ec999 | 415 | |
5475aada | 416 | return (ret); |
57ae8400 MK |
417 | } |
418 | #else | |
419 | static ssize_t | |
420 | zpl_aio_write(struct kiocb *kiocb, const struct iovec *iovp, | |
421 | unsigned long nr_segs, loff_t pos) | |
422 | { | |
933ec999 CC |
423 | struct file *file = kiocb->ki_filp; |
424 | struct address_space *mapping = file->f_mapping; | |
425 | struct inode *ip = mapping->host; | |
426 | int isblk = S_ISBLK(ip->i_mode); | |
427 | size_t count; | |
428 | ssize_t ret; | |
429 | ||
430 | ret = generic_segment_checks(iovp, &nr_segs, &count, VERIFY_READ); | |
431 | if (ret) | |
432 | return (ret); | |
433 | ||
434 | ret = generic_write_checks(file, &pos, &count, isblk); | |
435 | if (ret) | |
436 | return (ret); | |
437 | ||
438 | return (zpl_iter_write_common(kiocb, iovp, nr_segs, count, | |
5475aada | 439 | UIO_USERSPACE, 0)); |
57ae8400 MK |
440 | } |
441 | #endif /* HAVE_VFS_RW_ITERATE */ | |
442 | ||
802e7b5f LD |
443 | static loff_t |
444 | zpl_llseek(struct file *filp, loff_t offset, int whence) | |
445 | { | |
446 | #if defined(SEEK_HOLE) && defined(SEEK_DATA) | |
40d06e3c TC |
447 | fstrans_cookie_t cookie; |
448 | ||
802e7b5f LD |
449 | if (whence == SEEK_DATA || whence == SEEK_HOLE) { |
450 | struct inode *ip = filp->f_mapping->host; | |
451 | loff_t maxbytes = ip->i_sb->s_maxbytes; | |
452 | loff_t error; | |
453 | ||
9baaa7de | 454 | spl_inode_lock_shared(ip); |
40d06e3c | 455 | cookie = spl_fstrans_mark(); |
802e7b5f | 456 | error = -zfs_holey(ip, whence, &offset); |
40d06e3c | 457 | spl_fstrans_unmark(cookie); |
802e7b5f LD |
458 | if (error == 0) |
459 | error = lseek_execute(filp, ip, offset, maxbytes); | |
9baaa7de | 460 | spl_inode_unlock_shared(ip); |
802e7b5f LD |
461 | |
462 | return (error); | |
463 | } | |
464 | #endif /* SEEK_HOLE && SEEK_DATA */ | |
465 | ||
d1d7e268 | 466 | return (generic_file_llseek(filp, offset, whence)); |
802e7b5f LD |
467 | } |
468 | ||
c0d35759 BB |
469 | /* |
470 | * It's worth taking a moment to describe how mmap is implemented | |
471 | * for zfs because it differs considerably from other Linux filesystems. | |
472 | * However, this issue is handled the same way under OpenSolaris. | |
473 | * | |
474 | * The issue is that by design zfs bypasses the Linux page cache and | |
475 | * leaves all caching up to the ARC. This has been shown to work | |
476 | * well for the common read(2)/write(2) case. However, mmap(2) | |
477 | * is problem because it relies on being tightly integrated with the | |
478 | * page cache. To handle this we cache mmap'ed files twice, once in | |
479 | * the ARC and a second time in the page cache. The code is careful | |
480 | * to keep both copies synchronized. | |
481 | * | |
482 | * When a file with an mmap'ed region is written to using write(2) | |
483 | * both the data in the ARC and existing pages in the page cache | |
484 | * are updated. For a read(2) data will be read first from the page | |
485 | * cache then the ARC if needed. Neither a write(2) or read(2) will | |
486 | * will ever result in new pages being added to the page cache. | |
487 | * | |
488 | * New pages are added to the page cache only via .readpage() which | |
489 | * is called when the vfs needs to read a page off disk to back the | |
490 | * virtual memory region. These pages may be modified without | |
491 | * notifying the ARC and will be written out periodically via | |
492 | * .writepage(). This will occur due to either a sync or the usual | |
493 | * page aging behavior. Note because a read(2) of a mmap'ed file | |
494 | * will always check the page cache first even when the ARC is out | |
495 | * of date correct data will still be returned. | |
496 | * | |
497 | * While this implementation ensures correct behavior it does have | |
498 | * have some drawbacks. The most obvious of which is that it | |
499 | * increases the required memory footprint when access mmap'ed | |
500 | * files. It also adds additional complexity to the code keeping | |
501 | * both caches synchronized. | |
502 | * | |
503 | * Longer term it may be possible to cleanly resolve this wart by | |
504 | * mapping page cache pages directly on to the ARC buffers. The | |
505 | * Linux address space operations are flexible enough to allow | |
506 | * selection of which pages back a particular index. The trick | |
507 | * would be working out the details of which subsystem is in | |
508 | * charge, the ARC, the page cache, or both. It may also prove | |
509 | * helpful to move the ARC buffers to a scatter-gather lists | |
510 | * rather than a vmalloc'ed region. | |
511 | */ | |
512 | static int | |
513 | zpl_mmap(struct file *filp, struct vm_area_struct *vma) | |
514 | { | |
e2e7aa2d BB |
515 | struct inode *ip = filp->f_mapping->host; |
516 | znode_t *zp = ITOZ(ip); | |
c0d35759 | 517 | int error; |
40d06e3c | 518 | fstrans_cookie_t cookie; |
c0d35759 | 519 | |
40d06e3c | 520 | cookie = spl_fstrans_mark(); |
e2e7aa2d BB |
521 | error = -zfs_map(ip, vma->vm_pgoff, (caddr_t *)vma->vm_start, |
522 | (size_t)(vma->vm_end - vma->vm_start), vma->vm_flags); | |
40d06e3c | 523 | spl_fstrans_unmark(cookie); |
e2e7aa2d BB |
524 | if (error) |
525 | return (error); | |
526 | ||
c0d35759 BB |
527 | error = generic_file_mmap(filp, vma); |
528 | if (error) | |
529 | return (error); | |
530 | ||
531 | mutex_enter(&zp->z_lock); | |
18a2485f | 532 | zp->z_is_mapped = B_TRUE; |
c0d35759 BB |
533 | mutex_exit(&zp->z_lock); |
534 | ||
535 | return (error); | |
536 | } | |
537 | ||
538 | /* | |
539 | * Populate a page with data for the Linux page cache. This function is | |
540 | * only used to support mmap(2). There will be an identical copy of the | |
541 | * data in the ARC which is kept up to date via .write() and .writepage(). | |
542 | * | |
543 | * Current this function relies on zpl_read_common() and the O_DIRECT | |
544 | * flag to read in a page. This works but the more correct way is to | |
545 | * update zfs_fillpage() to be Linux friendly and use that interface. | |
546 | */ | |
547 | static int | |
548 | zpl_readpage(struct file *filp, struct page *pp) | |
549 | { | |
550 | struct inode *ip; | |
dde471ef | 551 | struct page *pl[1]; |
c0d35759 | 552 | int error = 0; |
40d06e3c | 553 | fstrans_cookie_t cookie; |
c0d35759 BB |
554 | |
555 | ASSERT(PageLocked(pp)); | |
556 | ip = pp->mapping->host; | |
dde471ef | 557 | pl[0] = pp; |
c0d35759 | 558 | |
40d06e3c | 559 | cookie = spl_fstrans_mark(); |
dde471ef | 560 | error = -zfs_getpage(ip, pl, 1); |
40d06e3c | 561 | spl_fstrans_unmark(cookie); |
c0d35759 | 562 | |
dde471ef PJ |
563 | if (error) { |
564 | SetPageError(pp); | |
565 | ClearPageUptodate(pp); | |
566 | } else { | |
567 | ClearPageError(pp); | |
568 | SetPageUptodate(pp); | |
569 | flush_dcache_page(pp); | |
570 | } | |
c0d35759 | 571 | |
dde471ef | 572 | unlock_page(pp); |
d1d7e268 | 573 | return (error); |
dde471ef | 574 | } |
c0d35759 | 575 | |
f3ab88d6 BB |
576 | /* |
577 | * Populate a set of pages with data for the Linux page cache. This | |
578 | * function will only be called for read ahead and never for demand | |
579 | * paging. For simplicity, the code relies on read_cache_pages() to | |
580 | * correctly lock each page for IO and call zpl_readpage(). | |
581 | */ | |
582 | static int | |
583 | zpl_readpages(struct file *filp, struct address_space *mapping, | |
4ea3f864 | 584 | struct list_head *pages, unsigned nr_pages) |
f3ab88d6 | 585 | { |
95d9fd02 BB |
586 | return (read_cache_pages(mapping, pages, |
587 | (filler_t *)zpl_readpage, filp)); | |
f3ab88d6 BB |
588 | } |
589 | ||
dde471ef PJ |
590 | int |
591 | zpl_putpage(struct page *pp, struct writeback_control *wbc, void *data) | |
592 | { | |
3c0e5c0f | 593 | struct address_space *mapping = data; |
92119cc2 | 594 | fstrans_cookie_t cookie; |
3c0e5c0f BB |
595 | |
596 | ASSERT(PageLocked(pp)); | |
597 | ASSERT(!PageWriteback(pp)); | |
8630650a | 598 | |
92119cc2 | 599 | cookie = spl_fstrans_mark(); |
62c4165a | 600 | (void) zfs_putpage(mapping->host, pp, wbc); |
92119cc2 | 601 | spl_fstrans_unmark(cookie); |
c0d35759 | 602 | |
3c0e5c0f | 603 | return (0); |
dde471ef | 604 | } |
c0d35759 | 605 | |
dde471ef PJ |
606 | static int |
607 | zpl_writepages(struct address_space *mapping, struct writeback_control *wbc) | |
608 | { | |
119a394a | 609 | znode_t *zp = ITOZ(mapping->host); |
0037b49e | 610 | zfsvfs_t *zfsvfs = ITOZSB(mapping->host); |
119a394a ED |
611 | enum writeback_sync_modes sync_mode; |
612 | int result; | |
613 | ||
0037b49e BB |
614 | ZFS_ENTER(zfsvfs); |
615 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) | |
119a394a | 616 | wbc->sync_mode = WB_SYNC_ALL; |
0037b49e | 617 | ZFS_EXIT(zfsvfs); |
119a394a ED |
618 | sync_mode = wbc->sync_mode; |
619 | ||
620 | /* | |
621 | * We don't want to run write_cache_pages() in SYNC mode here, because | |
622 | * that would make putpage() wait for a single page to be committed to | |
623 | * disk every single time, resulting in atrocious performance. Instead | |
624 | * we run it once in non-SYNC mode so that the ZIL gets all the data, | |
625 | * and then we commit it all in one go. | |
626 | */ | |
627 | wbc->sync_mode = WB_SYNC_NONE; | |
628 | result = write_cache_pages(mapping, wbc, zpl_putpage, mapping); | |
629 | if (sync_mode != wbc->sync_mode) { | |
0037b49e | 630 | ZFS_ENTER(zfsvfs); |
119a394a | 631 | ZFS_VERIFY_ZP(zp); |
0037b49e BB |
632 | if (zfsvfs->z_log != NULL) |
633 | zil_commit(zfsvfs->z_log, zp->z_id); | |
634 | ZFS_EXIT(zfsvfs); | |
119a394a ED |
635 | |
636 | /* | |
637 | * We need to call write_cache_pages() again (we can't just | |
638 | * return after the commit) because the previous call in | |
639 | * non-SYNC mode does not guarantee that we got all the dirty | |
640 | * pages (see the implementation of write_cache_pages() for | |
641 | * details). That being said, this is a no-op in most cases. | |
642 | */ | |
643 | wbc->sync_mode = sync_mode; | |
644 | result = write_cache_pages(mapping, wbc, zpl_putpage, mapping); | |
645 | } | |
646 | return (result); | |
c0d35759 BB |
647 | } |
648 | ||
649 | /* | |
650 | * Write out dirty pages to the ARC, this function is only required to | |
651 | * support mmap(2). Mapped pages may be dirtied by memory operations | |
652 | * which never call .write(). These dirty pages are kept in sync with | |
653 | * the ARC buffers via this hook. | |
c0d35759 BB |
654 | */ |
655 | static int | |
656 | zpl_writepage(struct page *pp, struct writeback_control *wbc) | |
657 | { | |
119a394a ED |
658 | if (ITOZSB(pp->mapping->host)->z_os->os_sync == ZFS_SYNC_ALWAYS) |
659 | wbc->sync_mode = WB_SYNC_ALL; | |
660 | ||
661 | return (zpl_putpage(pp, wbc, pp->mapping)); | |
c0d35759 BB |
662 | } |
663 | ||
cb2d1901 ED |
664 | /* |
665 | * The only flag combination which matches the behavior of zfs_space() | |
223df016 TC |
666 | * is FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE. The FALLOC_FL_PUNCH_HOLE |
667 | * flag was introduced in the 2.6.38 kernel. | |
cb2d1901 | 668 | */ |
223df016 | 669 | #if defined(HAVE_FILE_FALLOCATE) || defined(HAVE_INODE_FALLOCATE) |
cb2d1901 ED |
670 | long |
671 | zpl_fallocate_common(struct inode *ip, int mode, loff_t offset, loff_t len) | |
672 | { | |
cb2d1901 ED |
673 | int error = -EOPNOTSUPP; |
674 | ||
223df016 TC |
675 | #if defined(FALLOC_FL_PUNCH_HOLE) && defined(FALLOC_FL_KEEP_SIZE) |
676 | cred_t *cr = CRED(); | |
677 | flock64_t bf; | |
678 | loff_t olen; | |
40d06e3c | 679 | fstrans_cookie_t cookie; |
223df016 TC |
680 | |
681 | if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
682 | return (error); | |
cb2d1901 | 683 | |
223df016 TC |
684 | if (offset < 0 || len <= 0) |
685 | return (-EINVAL); | |
cb2d1901 | 686 | |
223df016 TC |
687 | spl_inode_lock(ip); |
688 | olen = i_size_read(ip); | |
cb2d1901 | 689 | |
223df016 TC |
690 | if (offset > olen) { |
691 | spl_inode_unlock(ip); | |
692 | return (0); | |
cb2d1901 | 693 | } |
223df016 TC |
694 | if (offset + len > olen) |
695 | len = olen - offset; | |
696 | bf.l_type = F_WRLCK; | |
697 | bf.l_whence = 0; | |
698 | bf.l_start = offset; | |
699 | bf.l_len = len; | |
700 | bf.l_pid = 0; | |
701 | ||
9fa4db44 | 702 | crhold(cr); |
40d06e3c | 703 | cookie = spl_fstrans_mark(); |
223df016 | 704 | error = -zfs_space(ip, F_FREESP, &bf, FWRITE, offset, cr); |
40d06e3c | 705 | spl_fstrans_unmark(cookie); |
223df016 | 706 | spl_inode_unlock(ip); |
cb2d1901 ED |
707 | |
708 | crfree(cr); | |
223df016 | 709 | #endif /* defined(FALLOC_FL_PUNCH_HOLE) && defined(FALLOC_FL_KEEP_SIZE) */ |
cb2d1901 ED |
710 | |
711 | ASSERT3S(error, <=, 0); | |
712 | return (error); | |
713 | } | |
223df016 | 714 | #endif /* defined(HAVE_FILE_FALLOCATE) || defined(HAVE_INODE_FALLOCATE) */ |
cb2d1901 ED |
715 | |
716 | #ifdef HAVE_FILE_FALLOCATE | |
717 | static long | |
718 | zpl_fallocate(struct file *filp, int mode, loff_t offset, loff_t len) | |
719 | { | |
d9c97ec0 | 720 | return zpl_fallocate_common(file_inode(filp), |
cb2d1901 ED |
721 | mode, offset, len); |
722 | } | |
723 | #endif /* HAVE_FILE_FALLOCATE */ | |
724 | ||
9c5167d1 NF |
725 | #define ZFS_FL_USER_VISIBLE (FS_FL_USER_VISIBLE | ZFS_PROJINHERIT_FL) |
726 | #define ZFS_FL_USER_MODIFIABLE (FS_FL_USER_MODIFIABLE | ZFS_PROJINHERIT_FL) | |
727 | ||
728 | static uint32_t | |
729 | __zpl_ioctl_getflags(struct inode *ip) | |
9d317793 | 730 | { |
9d317793 | 731 | uint64_t zfs_flags = ITOZ(ip)->z_pflags; |
9c5167d1 | 732 | uint32_t ioctl_flags = 0; |
9d317793 RY |
733 | |
734 | if (zfs_flags & ZFS_IMMUTABLE) | |
735 | ioctl_flags |= FS_IMMUTABLE_FL; | |
736 | ||
737 | if (zfs_flags & ZFS_APPENDONLY) | |
738 | ioctl_flags |= FS_APPEND_FL; | |
739 | ||
740 | if (zfs_flags & ZFS_NODUMP) | |
741 | ioctl_flags |= FS_NODUMP_FL; | |
742 | ||
9c5167d1 NF |
743 | if (zfs_flags & ZFS_PROJINHERIT) |
744 | ioctl_flags |= ZFS_PROJINHERIT_FL; | |
9d317793 | 745 | |
9c5167d1 NF |
746 | return (ioctl_flags & ZFS_FL_USER_VISIBLE); |
747 | } | |
9d317793 | 748 | |
9c5167d1 NF |
749 | /* |
750 | * Map zfs file z_pflags (xvattr_t) to linux file attributes. Only file | |
751 | * attributes common to both Linux and Solaris are mapped. | |
752 | */ | |
753 | static int | |
754 | zpl_ioctl_getflags(struct file *filp, void __user *arg) | |
755 | { | |
756 | uint32_t flags; | |
757 | int err; | |
758 | ||
759 | flags = __zpl_ioctl_getflags(file_inode(filp)); | |
760 | err = copy_to_user(arg, &flags, sizeof (flags)); | |
761 | ||
762 | return (err); | |
9d317793 RY |
763 | } |
764 | ||
765 | /* | |
766 | * fchange() is a helper macro to detect if we have been asked to change a | |
767 | * flag. This is ugly, but the requirement that we do this is a consequence of | |
768 | * how the Linux file attribute interface was designed. Another consequence is | |
769 | * that concurrent modification of files suffers from a TOCTOU race. Neither | |
770 | * are things we can fix without modifying the kernel-userland interface, which | |
771 | * is outside of our jurisdiction. | |
772 | */ | |
773 | ||
c360af54 | 774 | #define fchange(f0, f1, b0, b1) (!((f0) & (b0)) != !((f1) & (b1))) |
9d317793 RY |
775 | |
776 | static int | |
9c5167d1 | 777 | __zpl_ioctl_setflags(struct inode *ip, uint32_t ioctl_flags, xvattr_t *xva) |
9d317793 | 778 | { |
9c5167d1 NF |
779 | uint64_t zfs_flags = ITOZ(ip)->z_pflags; |
780 | xoptattr_t *xoap; | |
9d317793 | 781 | |
9c5167d1 NF |
782 | if (ioctl_flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NODUMP_FL | |
783 | ZFS_PROJINHERIT_FL)) | |
9d317793 RY |
784 | return (-EOPNOTSUPP); |
785 | ||
9c5167d1 | 786 | if (ioctl_flags & ~ZFS_FL_USER_MODIFIABLE) |
9d317793 RY |
787 | return (-EACCES); |
788 | ||
789 | if ((fchange(ioctl_flags, zfs_flags, FS_IMMUTABLE_FL, ZFS_IMMUTABLE) || | |
790 | fchange(ioctl_flags, zfs_flags, FS_APPEND_FL, ZFS_APPENDONLY)) && | |
791 | !capable(CAP_LINUX_IMMUTABLE)) | |
792 | return (-EACCES); | |
793 | ||
794 | if (!zpl_inode_owner_or_capable(ip)) | |
795 | return (-EACCES); | |
796 | ||
9c5167d1 NF |
797 | xva_init(xva); |
798 | xoap = xva_getxoptattr(xva); | |
9d317793 | 799 | |
9c5167d1 | 800 | XVA_SET_REQ(xva, XAT_IMMUTABLE); |
9d317793 RY |
801 | if (ioctl_flags & FS_IMMUTABLE_FL) |
802 | xoap->xoa_immutable = B_TRUE; | |
803 | ||
9c5167d1 | 804 | XVA_SET_REQ(xva, XAT_APPENDONLY); |
9d317793 RY |
805 | if (ioctl_flags & FS_APPEND_FL) |
806 | xoap->xoa_appendonly = B_TRUE; | |
807 | ||
9c5167d1 | 808 | XVA_SET_REQ(xva, XAT_NODUMP); |
9d317793 RY |
809 | if (ioctl_flags & FS_NODUMP_FL) |
810 | xoap->xoa_nodump = B_TRUE; | |
811 | ||
9c5167d1 NF |
812 | XVA_SET_REQ(xva, XAT_PROJINHERIT); |
813 | if (ioctl_flags & ZFS_PROJINHERIT_FL) | |
814 | xoap->xoa_projinherit = B_TRUE; | |
815 | ||
816 | return (0); | |
817 | } | |
818 | ||
819 | static int | |
820 | zpl_ioctl_setflags(struct file *filp, void __user *arg) | |
821 | { | |
822 | struct inode *ip = file_inode(filp); | |
823 | uint32_t flags; | |
824 | cred_t *cr = CRED(); | |
825 | xvattr_t xva; | |
826 | int err; | |
827 | fstrans_cookie_t cookie; | |
828 | ||
829 | if (copy_from_user(&flags, arg, sizeof (flags))) | |
830 | return (-EFAULT); | |
831 | ||
832 | err = __zpl_ioctl_setflags(ip, flags, &xva); | |
833 | if (err) | |
834 | return (err); | |
835 | ||
9d317793 | 836 | crhold(cr); |
40d06e3c | 837 | cookie = spl_fstrans_mark(); |
9c5167d1 | 838 | err = -zfs_setattr(ip, (vattr_t *)&xva, 0, cr); |
40d06e3c | 839 | spl_fstrans_unmark(cookie); |
9d317793 RY |
840 | crfree(cr); |
841 | ||
9c5167d1 NF |
842 | return (err); |
843 | } | |
844 | ||
845 | static int | |
846 | zpl_ioctl_getxattr(struct file *filp, void __user *arg) | |
847 | { | |
848 | zfsxattr_t fsx = { 0 }; | |
849 | struct inode *ip = file_inode(filp); | |
850 | int err; | |
851 | ||
852 | fsx.fsx_xflags = __zpl_ioctl_getflags(ip); | |
853 | fsx.fsx_projid = ITOZ(ip)->z_projid; | |
854 | err = copy_to_user(arg, &fsx, sizeof (fsx)); | |
855 | ||
856 | return (err); | |
857 | } | |
858 | ||
859 | static int | |
860 | zpl_ioctl_setxattr(struct file *filp, void __user *arg) | |
861 | { | |
862 | struct inode *ip = file_inode(filp); | |
863 | zfsxattr_t fsx; | |
864 | cred_t *cr = CRED(); | |
865 | xvattr_t xva; | |
866 | xoptattr_t *xoap; | |
867 | int err; | |
868 | fstrans_cookie_t cookie; | |
869 | ||
870 | if (copy_from_user(&fsx, arg, sizeof (fsx))) | |
871 | return (-EFAULT); | |
872 | ||
873 | if (!zpl_is_valid_projid(fsx.fsx_projid)) | |
874 | return (-EINVAL); | |
875 | ||
876 | err = __zpl_ioctl_setflags(ip, fsx.fsx_xflags, &xva); | |
877 | if (err) | |
878 | return (err); | |
879 | ||
880 | xoap = xva_getxoptattr(&xva); | |
881 | XVA_SET_REQ(&xva, XAT_PROJID); | |
882 | xoap->xoa_projid = fsx.fsx_projid; | |
883 | ||
884 | crhold(cr); | |
885 | cookie = spl_fstrans_mark(); | |
886 | err = -zfs_setattr(ip, (vattr_t *)&xva, 0, cr); | |
887 | spl_fstrans_unmark(cookie); | |
888 | crfree(cr); | |
889 | ||
890 | return (err); | |
9d317793 RY |
891 | } |
892 | ||
88c28395 BB |
893 | static long |
894 | zpl_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
895 | { | |
896 | switch (cmd) { | |
9d317793 RY |
897 | case FS_IOC_GETFLAGS: |
898 | return (zpl_ioctl_getflags(filp, (void *)arg)); | |
899 | case FS_IOC_SETFLAGS: | |
900 | return (zpl_ioctl_setflags(filp, (void *)arg)); | |
9c5167d1 NF |
901 | case ZFS_IOC_FSGETXATTR: |
902 | return (zpl_ioctl_getxattr(filp, (void *)arg)); | |
903 | case ZFS_IOC_FSSETXATTR: | |
904 | return (zpl_ioctl_setxattr(filp, (void *)arg)); | |
88c28395 BB |
905 | default: |
906 | return (-ENOTTY); | |
907 | } | |
908 | } | |
909 | ||
910 | #ifdef CONFIG_COMPAT | |
911 | static long | |
912 | zpl_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
913 | { | |
f7b939bd CIK |
914 | switch (cmd) { |
915 | case FS_IOC32_GETFLAGS: | |
916 | cmd = FS_IOC_GETFLAGS; | |
917 | break; | |
918 | case FS_IOC32_SETFLAGS: | |
919 | cmd = FS_IOC_SETFLAGS; | |
920 | break; | |
921 | default: | |
922 | return (-ENOTTY); | |
923 | } | |
924 | return (zpl_ioctl(filp, cmd, (unsigned long)compat_ptr(arg))); | |
88c28395 BB |
925 | } |
926 | #endif /* CONFIG_COMPAT */ | |
927 | ||
928 | ||
1efb473f | 929 | const struct address_space_operations zpl_address_space_operations = { |
dde471ef | 930 | .readpages = zpl_readpages, |
1efb473f BB |
931 | .readpage = zpl_readpage, |
932 | .writepage = zpl_writepage, | |
d1d7e268 | 933 | .writepages = zpl_writepages, |
1efb473f BB |
934 | }; |
935 | ||
936 | const struct file_operations zpl_file_operations = { | |
126400a1 BB |
937 | .open = zpl_open, |
938 | .release = zpl_release, | |
802e7b5f | 939 | .llseek = zpl_llseek, |
57ae8400 | 940 | #ifdef HAVE_VFS_RW_ITERATE |
7a789346 CC |
941 | #ifdef HAVE_NEW_SYNC_READ |
942 | .read = new_sync_read, | |
943 | .write = new_sync_write, | |
944 | #endif | |
57ae8400 MK |
945 | .read_iter = zpl_iter_read, |
946 | .write_iter = zpl_iter_write, | |
947 | #else | |
7a789346 CC |
948 | .read = do_sync_read, |
949 | .write = do_sync_write, | |
cd3939c5 RY |
950 | .aio_read = zpl_aio_read, |
951 | .aio_write = zpl_aio_write, | |
57ae8400 | 952 | #endif |
c0d35759 | 953 | .mmap = zpl_mmap, |
1efb473f | 954 | .fsync = zpl_fsync, |
7ca25051 | 955 | #ifdef HAVE_FILE_AIO_FSYNC |
cd3939c5 | 956 | .aio_fsync = zpl_aio_fsync, |
7ca25051 | 957 | #endif |
cb2d1901 | 958 | #ifdef HAVE_FILE_FALLOCATE |
d1d7e268 | 959 | .fallocate = zpl_fallocate, |
cb2d1901 | 960 | #endif /* HAVE_FILE_FALLOCATE */ |
d1d7e268 | 961 | .unlocked_ioctl = zpl_ioctl, |
88c28395 | 962 | #ifdef CONFIG_COMPAT |
d1d7e268 | 963 | .compat_ioctl = zpl_compat_ioctl, |
88c28395 | 964 | #endif |
1efb473f BB |
965 | }; |
966 | ||
967 | const struct file_operations zpl_dir_file_operations = { | |
968 | .llseek = generic_file_llseek, | |
969 | .read = generic_read_dir, | |
9464b959 | 970 | #if defined(HAVE_VFS_ITERATE_SHARED) |
9baaa7de CC |
971 | .iterate_shared = zpl_iterate, |
972 | #elif defined(HAVE_VFS_ITERATE) | |
0f37d0c8 RY |
973 | .iterate = zpl_iterate, |
974 | #else | |
1efb473f | 975 | .readdir = zpl_readdir, |
0f37d0c8 | 976 | #endif |
1efb473f | 977 | .fsync = zpl_fsync, |
88c28395 BB |
978 | .unlocked_ioctl = zpl_ioctl, |
979 | #ifdef CONFIG_COMPAT | |
980 | .compat_ioctl = zpl_compat_ioctl, | |
981 | #endif | |
1efb473f | 982 | }; |