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34dc7c2f 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 | |
1d3ba0bf | 9 | * or https://opensource.org/licenses/CDDL-1.0. |
34dc7c2f BB |
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 | */ | |
9b7b9cd3 | 21 | |
34dc7c2f | 22 | /* |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
a448a255 | 24 | * Copyright (c) 2012, 2018 by Delphix. All rights reserved. |
5475aada | 25 | * Copyright (c) 2015 by Chunwei Chen. All rights reserved. |
9b7b9cd3 | 26 | * Copyright 2017 Nexenta Systems, Inc. |
34dc7c2f BB |
27 | */ |
28 | ||
29 | /* Portions Copyright 2007 Jeremy Teo */ | |
428870ff | 30 | /* Portions Copyright 2010 Robert Milkowski */ |
34dc7c2f | 31 | |
60101509 | 32 | |
34dc7c2f BB |
33 | #include <sys/types.h> |
34 | #include <sys/param.h> | |
35 | #include <sys/time.h> | |
34dc7c2f | 36 | #include <sys/sysmacros.h> |
34dc7c2f | 37 | #include <sys/vfs.h> |
34dc7c2f BB |
38 | #include <sys/file.h> |
39 | #include <sys/stat.h> | |
40 | #include <sys/kmem.h> | |
41 | #include <sys/taskq.h> | |
42 | #include <sys/uio.h> | |
43 | #include <sys/vmsystm.h> | |
44 | #include <sys/atomic.h> | |
34dc7c2f BB |
45 | #include <sys/pathname.h> |
46 | #include <sys/cmn_err.h> | |
47 | #include <sys/errno.h> | |
34dc7c2f BB |
48 | #include <sys/zfs_dir.h> |
49 | #include <sys/zfs_acl.h> | |
50 | #include <sys/zfs_ioctl.h> | |
51 | #include <sys/fs/zfs.h> | |
52 | #include <sys/dmu.h> | |
428870ff | 53 | #include <sys/dmu_objset.h> |
34dc7c2f BB |
54 | #include <sys/spa.h> |
55 | #include <sys/txg.h> | |
56 | #include <sys/dbuf.h> | |
57 | #include <sys/zap.h> | |
428870ff | 58 | #include <sys/sa.h> |
34dc7c2f BB |
59 | #include <sys/policy.h> |
60 | #include <sys/sunddi.h> | |
b128c09f | 61 | #include <sys/sid.h> |
ebe7e575 | 62 | #include <sys/zfs_ctldir.h> |
34dc7c2f | 63 | #include <sys/zfs_fuid.h> |
957c7aa2 | 64 | #include <sys/zfs_quota.h> |
428870ff | 65 | #include <sys/zfs_sa.h> |
e5c39b95 | 66 | #include <sys/zfs_vnops.h> |
34dc7c2f | 67 | #include <sys/zfs_rlock.h> |
428870ff | 68 | #include <sys/cred.h> |
218b8eaf | 69 | #include <sys/zpl.h> |
1ce23dca | 70 | #include <sys/zil.h> |
9c5167d1 | 71 | #include <sys/sa_impl.h> |
34dc7c2f BB |
72 | |
73 | /* | |
74 | * Programming rules. | |
75 | * | |
76 | * Each vnode op performs some logical unit of work. To do this, the ZPL must | |
77 | * properly lock its in-core state, create a DMU transaction, do the work, | |
78 | * record this work in the intent log (ZIL), commit the DMU transaction, | |
79 | * and wait for the intent log to commit if it is a synchronous operation. | |
80 | * Moreover, the vnode ops must work in both normal and log replay context. | |
81 | * The ordering of events is important to avoid deadlocks and references | |
82 | * to freed memory. The example below illustrates the following Big Rules: | |
83 | * | |
84 | * (1) A check must be made in each zfs thread for a mounted file system. | |
768eaced CC |
85 | * This is done avoiding races using zfs_enter(zfsvfs). |
86 | * A zfs_exit(zfsvfs) is needed before all returns. Any znodes | |
87 | * must be checked with zfs_verify_zp(zp). Both of these macros | |
34dc7c2f BB |
88 | * can return EIO from the calling function. |
89 | * | |
2921ad6c | 90 | * (2) zrele() should always be the last thing except for zil_commit() (if |
768eaced | 91 | * necessary) and zfs_exit(). This is for 3 reasons: First, if it's the |
2921ad6c PD |
92 | * last reference, the vnode/znode can be freed, so the zp may point to |
93 | * freed memory. Second, the last reference will call zfs_zinactive(), | |
94 | * which may induce a lot of work -- pushing cached pages (which acquires | |
95 | * range locks) and syncing out cached atime changes. Third, | |
96 | * zfs_zinactive() may require a new tx, which could deadlock the system | |
97 | * if you were already holding one. This deadlock occurs because the tx | |
98 | * currently being operated on prevents a txg from syncing, which | |
99 | * prevents the new tx from progressing, resulting in a deadlock. If you | |
100 | * must call zrele() within a tx, use zfs_zrele_async(). Note that iput() | |
101 | * is a synonym for zrele(). | |
34dc7c2f BB |
102 | * |
103 | * (3) All range locks must be grabbed before calling dmu_tx_assign(), | |
104 | * as they can span dmu_tx_assign() calls. | |
105 | * | |
384f8a09 MA |
106 | * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to |
107 | * dmu_tx_assign(). This is critical because we don't want to block | |
108 | * while holding locks. | |
109 | * | |
768eaced | 110 | * If no ZPL locks are held (aside from zfs_enter()), use TXG_WAIT. This |
384f8a09 MA |
111 | * reduces lock contention and CPU usage when we must wait (note that if |
112 | * throughput is constrained by the storage, nearly every transaction | |
113 | * must wait). | |
114 | * | |
115 | * Note, in particular, that if a lock is sometimes acquired before | |
116 | * the tx assigns, and sometimes after (e.g. z_lock), then failing | |
117 | * to use a non-blocking assign can deadlock the system. The scenario: | |
34dc7c2f BB |
118 | * |
119 | * Thread A has grabbed a lock before calling dmu_tx_assign(). | |
120 | * Thread B is in an already-assigned tx, and blocks for this lock. | |
121 | * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() | |
122 | * forever, because the previous txg can't quiesce until B's tx commits. | |
123 | * | |
0037b49e | 124 | * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, |
e8b96c60 | 125 | * then drop all locks, call dmu_tx_wait(), and try again. On subsequent |
0735ecb3 | 126 | * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT, |
e8b96c60 MA |
127 | * to indicate that this operation has already called dmu_tx_wait(). |
128 | * This will ensure that we don't retry forever, waiting a short bit | |
129 | * each time. | |
34dc7c2f BB |
130 | * |
131 | * (5) If the operation succeeded, generate the intent log entry for it | |
132 | * before dropping locks. This ensures that the ordering of events | |
133 | * in the intent log matches the order in which they actually occurred. | |
d3cc8b15 | 134 | * During ZIL replay the zfs_log_* functions will update the sequence |
fb5f0bc8 | 135 | * number to indicate the zil transaction has replayed. |
34dc7c2f BB |
136 | * |
137 | * (6) At the end of each vnode op, the DMU tx must always commit, | |
138 | * regardless of whether there were any errors. | |
139 | * | |
572e2857 | 140 | * (7) After dropping all locks, invoke zil_commit(zilog, foid) |
34dc7c2f BB |
141 | * to ensure that synchronous semantics are provided when necessary. |
142 | * | |
143 | * In general, this is how things should be ordered in each vnode op: | |
144 | * | |
768eaced | 145 | * zfs_enter(zfsvfs); // exit if unmounted |
34dc7c2f | 146 | * top: |
3558fd73 | 147 | * zfs_dirent_lock(&dl, ...) // lock directory entry (may igrab()) |
34dc7c2f BB |
148 | * rw_enter(...); // grab any other locks you need |
149 | * tx = dmu_tx_create(...); // get DMU tx | |
150 | * dmu_tx_hold_*(); // hold each object you might modify | |
0735ecb3 | 151 | * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
152 | * if (error) { |
153 | * rw_exit(...); // drop locks | |
154 | * zfs_dirent_unlock(dl); // unlock directory entry | |
657ce253 | 155 | * zrele(...); // release held znodes |
fb5f0bc8 | 156 | * if (error == ERESTART) { |
e8b96c60 | 157 | * waited = B_TRUE; |
34dc7c2f BB |
158 | * dmu_tx_wait(tx); |
159 | * dmu_tx_abort(tx); | |
160 | * goto top; | |
161 | * } | |
162 | * dmu_tx_abort(tx); // abort DMU tx | |
768eaced | 163 | * zfs_exit(zfsvfs); // finished in zfs |
34dc7c2f BB |
164 | * return (error); // really out of space |
165 | * } | |
166 | * error = do_real_work(); // do whatever this VOP does | |
167 | * if (error == 0) | |
168 | * zfs_log_*(...); // on success, make ZIL entry | |
169 | * dmu_tx_commit(tx); // commit DMU tx -- error or not | |
170 | * rw_exit(...); // drop locks | |
171 | * zfs_dirent_unlock(dl); // unlock directory entry | |
657ce253 | 172 | * zrele(...); // release held znodes |
572e2857 | 173 | * zil_commit(zilog, foid); // synchronous when necessary |
768eaced | 174 | * zfs_exit(zfsvfs); // finished in zfs |
34dc7c2f BB |
175 | * return (error); // done, report error |
176 | */ | |
126400a1 BB |
177 | int |
178 | zfs_open(struct inode *ip, int mode, int flag, cred_t *cr) | |
179 | { | |
ef70eff1 | 180 | (void) cr; |
126400a1 | 181 | znode_t *zp = ITOZ(ip); |
0037b49e | 182 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
768eaced | 183 | int error; |
126400a1 | 184 | |
768eaced CC |
185 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
186 | return (error); | |
126400a1 BB |
187 | |
188 | /* Honor ZFS_APPENDONLY file attribute */ | |
189 | if ((mode & FMODE_WRITE) && (zp->z_pflags & ZFS_APPENDONLY) && | |
190 | ((flag & O_APPEND) == 0)) { | |
768eaced | 191 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 192 | return (SET_ERROR(EPERM)); |
126400a1 BB |
193 | } |
194 | ||
126400a1 BB |
195 | /* Keep a count of the synchronous opens in the znode */ |
196 | if (flag & O_SYNC) | |
197 | atomic_inc_32(&zp->z_sync_cnt); | |
198 | ||
768eaced | 199 | zfs_exit(zfsvfs, FTAG); |
126400a1 BB |
200 | return (0); |
201 | } | |
126400a1 | 202 | |
126400a1 BB |
203 | int |
204 | zfs_close(struct inode *ip, int flag, cred_t *cr) | |
205 | { | |
ef70eff1 | 206 | (void) cr; |
126400a1 | 207 | znode_t *zp = ITOZ(ip); |
0037b49e | 208 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
768eaced | 209 | int error; |
126400a1 | 210 | |
768eaced CC |
211 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
212 | return (error); | |
126400a1 | 213 | |
7dc71949 | 214 | /* Decrement the synchronous opens in the znode */ |
126400a1 | 215 | if (flag & O_SYNC) |
7dc71949 | 216 | atomic_dec_32(&zp->z_sync_cnt); |
126400a1 | 217 | |
768eaced | 218 | zfs_exit(zfsvfs, FTAG); |
8780c539 | 219 | return (0); |
126400a1 | 220 | } |
126400a1 | 221 | |
c0d35759 | 222 | #if defined(_KERNEL) |
89cd2197 BB |
223 | |
224 | static int zfs_fillpage(struct inode *ip, struct page *pp); | |
225 | ||
34dc7c2f BB |
226 | /* |
227 | * When a file is memory mapped, we must keep the IO data synchronized | |
89cd2197 BB |
228 | * between the DMU cache and the memory mapped pages. Update all mapped |
229 | * pages with the contents of the coresponding dmu buffer. | |
34dc7c2f | 230 | */ |
e53d678d | 231 | void |
8a9634e2 | 232 | update_pages(znode_t *zp, int64_t start, int len, objset_t *os) |
34dc7c2f | 233 | { |
89cd2197 BB |
234 | struct address_space *mp = ZTOI(zp)->i_mapping; |
235 | int64_t off = start & (PAGE_SIZE - 1); | |
34dc7c2f | 236 | |
8b1899d3 | 237 | for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) { |
89cd2197 | 238 | uint64_t nbytes = MIN(PAGE_SIZE - off, len); |
34dc7c2f | 239 | |
89cd2197 | 240 | struct page *pp = find_lock_page(mp, start >> PAGE_SHIFT); |
c0d35759 BB |
241 | if (pp) { |
242 | if (mapping_writably_mapped(mp)) | |
243 | flush_dcache_page(pp); | |
34dc7c2f | 244 | |
89cd2197 BB |
245 | void *pb = kmap(pp); |
246 | int error = dmu_read(os, zp->z_id, start + off, | |
247 | nbytes, pb + off, DMU_READ_PREFETCH); | |
c0d35759 BB |
248 | kunmap(pp); |
249 | ||
89cd2197 BB |
250 | if (error) { |
251 | SetPageError(pp); | |
252 | ClearPageUptodate(pp); | |
253 | } else { | |
254 | ClearPageError(pp); | |
255 | SetPageUptodate(pp); | |
256 | ||
257 | if (mapping_writably_mapped(mp)) | |
258 | flush_dcache_page(pp); | |
259 | ||
260 | mark_page_accessed(pp); | |
261 | } | |
c0d35759 | 262 | |
c0d35759 | 263 | unlock_page(pp); |
8b1899d3 | 264 | put_page(pp); |
34dc7c2f | 265 | } |
c0d35759 | 266 | |
d164b209 | 267 | len -= nbytes; |
34dc7c2f | 268 | off = 0; |
34dc7c2f | 269 | } |
34dc7c2f BB |
270 | } |
271 | ||
272 | /* | |
89cd2197 BB |
273 | * When a file is memory mapped, we must keep the I/O data synchronized |
274 | * between the DMU cache and the memory mapped pages. Preferentially read | |
275 | * from memory mapped pages, otherwise fallback to reading through the dmu. | |
34dc7c2f | 276 | */ |
e53d678d | 277 | int |
d0cd9a5c | 278 | mappedread(znode_t *zp, int nbytes, zfs_uio_t *uio) |
34dc7c2f | 279 | { |
e53d678d | 280 | struct inode *ip = ZTOI(zp); |
c0d35759 | 281 | struct address_space *mp = ip->i_mapping; |
89cd2197 BB |
282 | int64_t start = uio->uio_loffset; |
283 | int64_t off = start & (PAGE_SIZE - 1); | |
34dc7c2f BB |
284 | int len = nbytes; |
285 | int error = 0; | |
286 | ||
8b1899d3 | 287 | for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) { |
89cd2197 | 288 | uint64_t bytes = MIN(PAGE_SIZE - off, len); |
c0d35759 | 289 | |
89cd2197 | 290 | struct page *pp = find_lock_page(mp, start >> PAGE_SHIFT); |
c0d35759 | 291 | if (pp) { |
89cd2197 BB |
292 | /* |
293 | * If filemap_fault() retries there exists a window | |
294 | * where the page will be unlocked and not up to date. | |
295 | * In this case we must try and fill the page. | |
296 | */ | |
297 | if (unlikely(!PageUptodate(pp))) { | |
298 | error = zfs_fillpage(ip, pp); | |
299 | if (error) { | |
300 | unlock_page(pp); | |
301 | put_page(pp); | |
302 | return (error); | |
303 | } | |
304 | } | |
305 | ||
306 | ASSERT(PageUptodate(pp) || PageDirty(pp)); | |
307 | ||
b2ab468d | 308 | unlock_page(pp); |
c0d35759 | 309 | |
89cd2197 | 310 | void *pb = kmap(pp); |
d0cd9a5c | 311 | error = zfs_uiomove(pb + off, bytes, UIO_READ, uio); |
c0d35759 BB |
312 | kunmap(pp); |
313 | ||
314 | if (mapping_writably_mapped(mp)) | |
315 | flush_dcache_page(pp); | |
316 | ||
317 | mark_page_accessed(pp); | |
8b1899d3 | 318 | put_page(pp); |
34dc7c2f | 319 | } else { |
804e0504 MA |
320 | error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl), |
321 | uio, bytes); | |
34dc7c2f | 322 | } |
c0d35759 | 323 | |
34dc7c2f BB |
324 | len -= bytes; |
325 | off = 0; | |
89cd2197 | 326 | |
34dc7c2f BB |
327 | if (error) |
328 | break; | |
329 | } | |
89cd2197 | 330 | |
34dc7c2f BB |
331 | return (error); |
332 | } | |
c0d35759 | 333 | #endif /* _KERNEL */ |
34dc7c2f | 334 | |
18168da7 | 335 | static unsigned long zfs_delete_blocks = DMU_MAX_DELETEBLKCNT; |
34dc7c2f | 336 | |
13a9a6f5 MM |
337 | /* |
338 | * Write the bytes to a file. | |
339 | * | |
340 | * IN: zp - znode of file to be written to | |
341 | * data - bytes to write | |
342 | * len - number of bytes to write | |
343 | * pos - offset to start writing at | |
344 | * | |
345 | * OUT: resid - remaining bytes to write | |
346 | * | |
347 | * RETURN: 0 if success | |
1c2358c1 BB |
348 | * positive error code if failure. EIO is returned |
349 | * for a short write when residp isn't provided. | |
13a9a6f5 MM |
350 | * |
351 | * Timestamps: | |
352 | * zp - ctime|mtime updated if byte count > 0 | |
353 | */ | |
354 | int | |
355 | zfs_write_simple(znode_t *zp, const void *data, size_t len, | |
1c2358c1 | 356 | loff_t pos, size_t *residp) |
13a9a6f5 | 357 | { |
1c2358c1 BB |
358 | fstrans_cookie_t cookie; |
359 | int error; | |
360 | ||
361 | struct iovec iov; | |
362 | iov.iov_base = (void *)data; | |
363 | iov.iov_len = len; | |
364 | ||
d0cd9a5c BA |
365 | zfs_uio_t uio; |
366 | zfs_uio_iovec_init(&uio, &iov, 1, pos, UIO_SYSSPACE, len, 0); | |
13a9a6f5 | 367 | |
1c2358c1 BB |
368 | cookie = spl_fstrans_mark(); |
369 | error = zfs_write(zp, &uio, 0, kcred); | |
370 | spl_fstrans_unmark(cookie); | |
371 | ||
372 | if (error == 0) { | |
373 | if (residp != NULL) | |
d0cd9a5c BA |
374 | *residp = zfs_uio_resid(&uio); |
375 | else if (zfs_uio_resid(&uio) != 0) | |
1c2358c1 | 376 | error = SET_ERROR(EIO); |
13a9a6f5 | 377 | } |
1c2358c1 | 378 | |
13a9a6f5 MM |
379 | return (error); |
380 | } | |
381 | ||
23c13c7e AL |
382 | static void |
383 | zfs_rele_async_task(void *arg) | |
384 | { | |
385 | iput(arg); | |
386 | } | |
387 | ||
0a50679c | 388 | void |
657ce253 | 389 | zfs_zrele_async(znode_t *zp) |
3558fd73 | 390 | { |
657ce253 | 391 | struct inode *ip = ZTOI(zp); |
0a50679c BB |
392 | objset_t *os = ITOZSB(ip)->z_os; |
393 | ||
3558fd73 | 394 | ASSERT(atomic_read(&ip->i_count) > 0); |
0a50679c BB |
395 | ASSERT(os != NULL); |
396 | ||
2921ad6c PD |
397 | /* |
398 | * If decrementing the count would put us at 0, we can't do it inline | |
399 | * here, because that would be synchronous. Instead, dispatch an iput | |
400 | * to run later. | |
401 | * | |
402 | * For more information on the dangers of a synchronous iput, see the | |
403 | * header comment of this file. | |
404 | */ | |
405 | if (!atomic_add_unless(&ip->i_count, -1, 1)) { | |
657ce253 | 406 | VERIFY(taskq_dispatch(dsl_pool_zrele_taskq(dmu_objset_pool(os)), |
23c13c7e | 407 | zfs_rele_async_task, ip, TQ_SLEEP) != TASKQID_INVALID); |
2921ad6c | 408 | } |
3558fd73 BB |
409 | } |
410 | ||
34dc7c2f | 411 | |
34dc7c2f BB |
412 | /* |
413 | * Lookup an entry in a directory, or an extended attribute directory. | |
3558fd73 | 414 | * If it exists, return a held inode reference for it. |
34dc7c2f | 415 | * |
657ce253 | 416 | * IN: zdp - znode of directory to search. |
34dc7c2f | 417 | * nm - name of entry to lookup. |
34dc7c2f | 418 | * flags - LOOKUP_XATTR set if looking for an attribute. |
34dc7c2f | 419 | * cr - credentials of caller. |
34dc7c2f BB |
420 | * direntflags - directory lookup flags |
421 | * realpnp - returned pathname. | |
422 | * | |
657ce253 | 423 | * OUT: zpp - znode of located entry, NULL if not found. |
34dc7c2f | 424 | * |
d3cc8b15 | 425 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
426 | * |
427 | * Timestamps: | |
428 | * NA | |
429 | */ | |
e5c39b95 | 430 | int |
4d55ea81 RM |
431 | zfs_lookup(znode_t *zdp, char *nm, znode_t **zpp, int flags, cred_t *cr, |
432 | int *direntflags, pathname_t *realpnp) | |
34dc7c2f | 433 | { |
657ce253 | 434 | zfsvfs_t *zfsvfs = ZTOZSB(zdp); |
3558fd73 | 435 | int error = 0; |
45d1cae3 | 436 | |
9b7b9cd3 GM |
437 | /* |
438 | * Fast path lookup, however we must skip DNLC lookup | |
439 | * for case folding or normalizing lookups because the | |
440 | * DNLC code only stores the passed in name. This means | |
441 | * creating 'a' and removing 'A' on a case insensitive | |
442 | * file system would work, but DNLC still thinks 'a' | |
443 | * exists and won't let you create it again on the next | |
444 | * pass through fast path. | |
445 | */ | |
45d1cae3 BB |
446 | if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) { |
447 | ||
657ce253 | 448 | if (!S_ISDIR(ZTOI(zdp)->i_mode)) { |
2e528b49 | 449 | return (SET_ERROR(ENOTDIR)); |
428870ff | 450 | } else if (zdp->z_sa_hdl == NULL) { |
2e528b49 | 451 | return (SET_ERROR(EIO)); |
45d1cae3 BB |
452 | } |
453 | ||
454 | if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) { | |
455 | error = zfs_fastaccesschk_execute(zdp, cr); | |
456 | if (!error) { | |
657ce253 MM |
457 | *zpp = zdp; |
458 | zhold(*zpp); | |
45d1cae3 BB |
459 | return (0); |
460 | } | |
461 | return (error); | |
45d1cae3 BB |
462 | } |
463 | } | |
464 | ||
768eaced CC |
465 | if ((error = zfs_enter_verify_zp(zfsvfs, zdp, FTAG)) != 0) |
466 | return (error); | |
34dc7c2f | 467 | |
657ce253 | 468 | *zpp = NULL; |
34dc7c2f BB |
469 | |
470 | if (flags & LOOKUP_XATTR) { | |
34dc7c2f BB |
471 | /* |
472 | * We don't allow recursive attributes.. | |
473 | * Maybe someday we will. | |
474 | */ | |
428870ff | 475 | if (zdp->z_pflags & ZFS_XATTR) { |
768eaced | 476 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 477 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
478 | } |
479 | ||
657ce253 | 480 | if ((error = zfs_get_xattrdir(zdp, zpp, cr, flags))) { |
768eaced | 481 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
482 | return (error); |
483 | } | |
484 | ||
485 | /* | |
486 | * Do we have permission to get into attribute directory? | |
487 | */ | |
488 | ||
657ce253 | 489 | if ((error = zfs_zaccess(*zpp, ACE_EXECUTE, 0, |
d4dc53da | 490 | B_TRUE, cr, zfs_init_idmap))) { |
657ce253 MM |
491 | zrele(*zpp); |
492 | *zpp = NULL; | |
34dc7c2f BB |
493 | } |
494 | ||
768eaced | 495 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
496 | return (error); |
497 | } | |
498 | ||
657ce253 | 499 | if (!S_ISDIR(ZTOI(zdp)->i_mode)) { |
768eaced | 500 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 501 | return (SET_ERROR(ENOTDIR)); |
34dc7c2f BB |
502 | } |
503 | ||
504 | /* | |
505 | * Check accessibility of directory. | |
506 | */ | |
507 | ||
f224eddf | 508 | if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr, |
d4dc53da | 509 | zfs_init_idmap))) { |
768eaced | 510 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
511 | return (error); |
512 | } | |
513 | ||
0037b49e | 514 | if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), |
34dc7c2f | 515 | NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
768eaced | 516 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 517 | return (SET_ERROR(EILSEQ)); |
34dc7c2f BB |
518 | } |
519 | ||
657ce253 MM |
520 | error = zfs_dirlook(zdp, nm, zpp, flags, direntflags, realpnp); |
521 | if ((error == 0) && (*zpp)) | |
fc273894 | 522 | zfs_znode_update_vfs(*zpp); |
34dc7c2f | 523 | |
768eaced | 524 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
525 | return (error); |
526 | } | |
527 | ||
528 | /* | |
529 | * Attempt to create a new entry in a directory. If the entry | |
530 | * already exists, truncate the file if permissible, else return | |
3558fd73 | 531 | * an error. Return the ip of the created or trunc'd file. |
34dc7c2f | 532 | * |
657ce253 | 533 | * IN: dzp - znode of directory to put new file entry in. |
34dc7c2f BB |
534 | * name - name of new file entry. |
535 | * vap - attributes of new file. | |
536 | * excl - flag indicating exclusive or non-exclusive mode. | |
537 | * mode - mode to open file with. | |
538 | * cr - credentials of caller. | |
a35c1207 | 539 | * flag - file flag. |
3558fd73 | 540 | * vsecp - ACL to be set |
2a068a13 | 541 | * mnt_ns - user namespace of the mount |
34dc7c2f | 542 | * |
657ce253 | 543 | * OUT: zpp - znode of created or trunc'd entry. |
34dc7c2f | 544 | * |
d3cc8b15 | 545 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
546 | * |
547 | * Timestamps: | |
657ce253 MM |
548 | * dzp - ctime|mtime updated if new entry created |
549 | * zp - ctime|mtime always, atime if new | |
34dc7c2f | 550 | */ |
e5c39b95 | 551 | int |
657ce253 | 552 | zfs_create(znode_t *dzp, char *name, vattr_t *vap, int excl, |
2a068a13 | 553 | int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp, |
d4dc53da | 554 | zidmap_t *mnt_ns) |
34dc7c2f | 555 | { |
657ce253 MM |
556 | znode_t *zp; |
557 | zfsvfs_t *zfsvfs = ZTOZSB(dzp); | |
34dc7c2f BB |
558 | zilog_t *zilog; |
559 | objset_t *os; | |
560 | zfs_dirlock_t *dl; | |
561 | dmu_tx_t *tx; | |
562 | int error; | |
b128c09f | 563 | uid_t uid; |
149e873a | 564 | gid_t gid; |
428870ff | 565 | zfs_acl_ids_t acl_ids; |
9babb374 | 566 | boolean_t fuid_dirtied; |
428870ff | 567 | boolean_t have_acl = B_FALSE; |
e8b96c60 | 568 | boolean_t waited = B_FALSE; |
e3785718 | 569 | boolean_t skip_acl = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; |
34dc7c2f BB |
570 | |
571 | /* | |
572 | * If we have an ephemeral id, ACL, or XVATTR then | |
573 | * make sure file system is at proper version | |
574 | */ | |
575 | ||
149e873a | 576 | gid = crgetgid(cr); |
3558fd73 | 577 | uid = crgetuid(cr); |
b128c09f | 578 | |
0037b49e | 579 | if (zfsvfs->z_use_fuids == B_FALSE && |
3558fd73 | 580 | (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) |
2e528b49 | 581 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 582 | |
32dec7bd | 583 | if (name == NULL) |
584 | return (SET_ERROR(EINVAL)); | |
585 | ||
768eaced CC |
586 | if ((error = zfs_enter_verify_zp(zfsvfs, dzp, FTAG)) != 0) |
587 | return (error); | |
0037b49e BB |
588 | os = zfsvfs->z_os; |
589 | zilog = zfsvfs->z_log; | |
34dc7c2f | 590 | |
0037b49e | 591 | if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), |
34dc7c2f | 592 | NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
768eaced | 593 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 594 | return (SET_ERROR(EILSEQ)); |
34dc7c2f BB |
595 | } |
596 | ||
5484965a | 597 | if (vap->va_mask & ATTR_XVATTR) { |
34dc7c2f | 598 | if ((error = secpolicy_xvattr((xvattr_t *)vap, |
3558fd73 | 599 | crgetuid(cr), cr, vap->va_mode)) != 0) { |
768eaced | 600 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
601 | return (error); |
602 | } | |
603 | } | |
34dc7c2f | 604 | |
3558fd73 | 605 | top: |
657ce253 | 606 | *zpp = NULL; |
34dc7c2f BB |
607 | if (*name == '\0') { |
608 | /* | |
609 | * Null component name refers to the directory itself. | |
610 | */ | |
657ce253 | 611 | zhold(dzp); |
34dc7c2f BB |
612 | zp = dzp; |
613 | dl = NULL; | |
614 | error = 0; | |
615 | } else { | |
3558fd73 | 616 | /* possible igrab(zp) */ |
34dc7c2f BB |
617 | int zflg = 0; |
618 | ||
619 | if (flag & FIGNORECASE) | |
620 | zflg |= ZCILOOK; | |
621 | ||
622 | error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, | |
623 | NULL, NULL); | |
624 | if (error) { | |
572e2857 BB |
625 | if (have_acl) |
626 | zfs_acl_ids_free(&acl_ids); | |
34dc7c2f | 627 | if (strcmp(name, "..") == 0) |
2e528b49 | 628 | error = SET_ERROR(EISDIR); |
768eaced | 629 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
630 | return (error); |
631 | } | |
632 | } | |
428870ff | 633 | |
34dc7c2f BB |
634 | if (zp == NULL) { |
635 | uint64_t txtype; | |
9c5167d1 | 636 | uint64_t projid = ZFS_DEFAULT_PROJID; |
34dc7c2f BB |
637 | |
638 | /* | |
639 | * Create a new file object and update the directory | |
640 | * to reference it. | |
641 | */ | |
e3785718 | 642 | if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, skip_acl, cr, |
2a068a13 | 643 | mnt_ns))) { |
572e2857 BB |
644 | if (have_acl) |
645 | zfs_acl_ids_free(&acl_ids); | |
34dc7c2f BB |
646 | goto out; |
647 | } | |
648 | ||
649 | /* | |
650 | * We only support the creation of regular files in | |
651 | * extended attribute directories. | |
652 | */ | |
428870ff | 653 | |
3558fd73 | 654 | if ((dzp->z_pflags & ZFS_XATTR) && !S_ISREG(vap->va_mode)) { |
572e2857 BB |
655 | if (have_acl) |
656 | zfs_acl_ids_free(&acl_ids); | |
2e528b49 | 657 | error = SET_ERROR(EINVAL); |
34dc7c2f BB |
658 | goto out; |
659 | } | |
660 | ||
428870ff | 661 | if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap, |
2a068a13 | 662 | cr, vsecp, &acl_ids, mnt_ns)) != 0) |
9babb374 | 663 | goto out; |
428870ff BB |
664 | have_acl = B_TRUE; |
665 | ||
9c5167d1 NF |
666 | if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode)) |
667 | projid = zfs_inherit_projid(dzp); | |
668 | if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) { | |
45d1cae3 | 669 | zfs_acl_ids_free(&acl_ids); |
2e528b49 | 670 | error = SET_ERROR(EDQUOT); |
9babb374 BB |
671 | goto out; |
672 | } | |
673 | ||
34dc7c2f | 674 | tx = dmu_tx_create(os); |
428870ff BB |
675 | |
676 | dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + | |
677 | ZFS_SA_BASE_ATTR_SIZE); | |
678 | ||
0037b49e | 679 | fuid_dirtied = zfsvfs->z_fuid_dirty; |
9babb374 | 680 | if (fuid_dirtied) |
0037b49e | 681 | zfs_fuid_txhold(zfsvfs, tx); |
34dc7c2f | 682 | dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
428870ff | 683 | dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); |
0037b49e | 684 | if (!zfsvfs->z_use_sa && |
428870ff | 685 | acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
34dc7c2f | 686 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
428870ff | 687 | 0, acl_ids.z_aclp->z_acl_bytes); |
34dc7c2f | 688 | } |
599b8648 | 689 | |
0735ecb3 PS |
690 | error = dmu_tx_assign(tx, |
691 | (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); | |
34dc7c2f BB |
692 | if (error) { |
693 | zfs_dirent_unlock(dl); | |
fb5f0bc8 | 694 | if (error == ERESTART) { |
e8b96c60 | 695 | waited = B_TRUE; |
34dc7c2f BB |
696 | dmu_tx_wait(tx); |
697 | dmu_tx_abort(tx); | |
698 | goto top; | |
699 | } | |
428870ff | 700 | zfs_acl_ids_free(&acl_ids); |
34dc7c2f | 701 | dmu_tx_abort(tx); |
768eaced | 702 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
703 | return (error); |
704 | } | |
428870ff | 705 | zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); |
9babb374 | 706 | |
599b8648 CC |
707 | error = zfs_link_create(dl, zp, tx, ZNEW); |
708 | if (error != 0) { | |
709 | /* | |
710 | * Since, we failed to add the directory entry for it, | |
711 | * delete the newly created dnode. | |
712 | */ | |
713 | zfs_znode_delete(zp, tx); | |
714 | remove_inode_hash(ZTOI(zp)); | |
715 | zfs_acl_ids_free(&acl_ids); | |
716 | dmu_tx_commit(tx); | |
717 | goto out; | |
718 | } | |
719 | ||
9babb374 | 720 | if (fuid_dirtied) |
0037b49e | 721 | zfs_fuid_sync(zfsvfs, tx); |
9babb374 | 722 | |
34dc7c2f BB |
723 | txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); |
724 | if (flag & FIGNORECASE) | |
725 | txtype |= TX_CI; | |
726 | zfs_log_create(zilog, tx, txtype, dzp, zp, name, | |
9babb374 BB |
727 | vsecp, acl_ids.z_fuidp, vap); |
728 | zfs_acl_ids_free(&acl_ids); | |
34dc7c2f BB |
729 | dmu_tx_commit(tx); |
730 | } else { | |
da92d5cb | 731 | int aflags = (flag & O_APPEND) ? V_APPEND : 0; |
34dc7c2f | 732 | |
572e2857 BB |
733 | if (have_acl) |
734 | zfs_acl_ids_free(&acl_ids); | |
572e2857 | 735 | |
34dc7c2f BB |
736 | /* |
737 | * A directory entry already exists for this name. | |
738 | */ | |
739 | /* | |
740 | * Can't truncate an existing file if in exclusive mode. | |
741 | */ | |
3558fd73 | 742 | if (excl) { |
2e528b49 | 743 | error = SET_ERROR(EEXIST); |
34dc7c2f BB |
744 | goto out; |
745 | } | |
746 | /* | |
747 | * Can't open a directory for writing. | |
748 | */ | |
3558fd73 | 749 | if (S_ISDIR(ZTOI(zp)->i_mode)) { |
2e528b49 | 750 | error = SET_ERROR(EISDIR); |
34dc7c2f BB |
751 | goto out; |
752 | } | |
753 | /* | |
754 | * Verify requested access to file. | |
755 | */ | |
2a068a13 YY |
756 | if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr, |
757 | mnt_ns))) { | |
34dc7c2f BB |
758 | goto out; |
759 | } | |
760 | ||
761 | mutex_enter(&dzp->z_lock); | |
762 | dzp->z_seq++; | |
763 | mutex_exit(&dzp->z_lock); | |
764 | ||
765 | /* | |
766 | * Truncate regular files if requested. | |
767 | */ | |
3558fd73 BB |
768 | if (S_ISREG(ZTOI(zp)->i_mode) && |
769 | (vap->va_mask & ATTR_SIZE) && (vap->va_size == 0)) { | |
b128c09f | 770 | /* we can't hold any locks when calling zfs_freesp() */ |
609603a5 B |
771 | if (dl) { |
772 | zfs_dirent_unlock(dl); | |
773 | dl = NULL; | |
774 | } | |
34dc7c2f | 775 | error = zfs_freesp(zp, 0, 0, mode, TRUE); |
34dc7c2f BB |
776 | } |
777 | } | |
778 | out: | |
779 | ||
780 | if (dl) | |
781 | zfs_dirent_unlock(dl); | |
782 | ||
783 | if (error) { | |
784 | if (zp) | |
657ce253 | 785 | zrele(zp); |
34dc7c2f | 786 | } else { |
fc273894 KHN |
787 | zfs_znode_update_vfs(dzp); |
788 | zfs_znode_update_vfs(zp); | |
657ce253 | 789 | *zpp = zp; |
34dc7c2f | 790 | } |
34dc7c2f | 791 | |
0037b49e | 792 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 793 | zil_commit(zilog, 0); |
428870ff | 794 | |
768eaced | 795 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
796 | return (error); |
797 | } | |
798 | ||
ace1eae8 CC |
799 | int |
800 | zfs_tmpfile(struct inode *dip, vattr_t *vap, int excl, | |
2a068a13 | 801 | int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp, |
d4dc53da | 802 | zidmap_t *mnt_ns) |
ace1eae8 | 803 | { |
ef70eff1 | 804 | (void) excl, (void) mode, (void) flag; |
ace1eae8 | 805 | znode_t *zp = NULL, *dzp = ITOZ(dip); |
0037b49e | 806 | zfsvfs_t *zfsvfs = ITOZSB(dip); |
ace1eae8 CC |
807 | objset_t *os; |
808 | dmu_tx_t *tx; | |
809 | int error; | |
810 | uid_t uid; | |
811 | gid_t gid; | |
812 | zfs_acl_ids_t acl_ids; | |
9c5167d1 | 813 | uint64_t projid = ZFS_DEFAULT_PROJID; |
ace1eae8 CC |
814 | boolean_t fuid_dirtied; |
815 | boolean_t have_acl = B_FALSE; | |
816 | boolean_t waited = B_FALSE; | |
817 | ||
818 | /* | |
819 | * If we have an ephemeral id, ACL, or XVATTR then | |
820 | * make sure file system is at proper version | |
821 | */ | |
822 | ||
823 | gid = crgetgid(cr); | |
824 | uid = crgetuid(cr); | |
825 | ||
0037b49e | 826 | if (zfsvfs->z_use_fuids == B_FALSE && |
ace1eae8 CC |
827 | (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) |
828 | return (SET_ERROR(EINVAL)); | |
829 | ||
768eaced CC |
830 | if ((error = zfs_enter_verify_zp(zfsvfs, dzp, FTAG)) != 0) |
831 | return (error); | |
0037b49e | 832 | os = zfsvfs->z_os; |
ace1eae8 CC |
833 | |
834 | if (vap->va_mask & ATTR_XVATTR) { | |
835 | if ((error = secpolicy_xvattr((xvattr_t *)vap, | |
836 | crgetuid(cr), cr, vap->va_mode)) != 0) { | |
768eaced | 837 | zfs_exit(zfsvfs, FTAG); |
ace1eae8 CC |
838 | return (error); |
839 | } | |
840 | } | |
841 | ||
842 | top: | |
843 | *ipp = NULL; | |
844 | ||
845 | /* | |
846 | * Create a new file object and update the directory | |
847 | * to reference it. | |
848 | */ | |
2a068a13 | 849 | if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr, mnt_ns))) { |
ace1eae8 CC |
850 | if (have_acl) |
851 | zfs_acl_ids_free(&acl_ids); | |
852 | goto out; | |
853 | } | |
854 | ||
855 | if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap, | |
2a068a13 | 856 | cr, vsecp, &acl_ids, mnt_ns)) != 0) |
ace1eae8 CC |
857 | goto out; |
858 | have_acl = B_TRUE; | |
859 | ||
9c5167d1 NF |
860 | if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode)) |
861 | projid = zfs_inherit_projid(dzp); | |
862 | if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) { | |
ace1eae8 CC |
863 | zfs_acl_ids_free(&acl_ids); |
864 | error = SET_ERROR(EDQUOT); | |
865 | goto out; | |
866 | } | |
867 | ||
868 | tx = dmu_tx_create(os); | |
869 | ||
870 | dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + | |
871 | ZFS_SA_BASE_ATTR_SIZE); | |
0037b49e | 872 | dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
ace1eae8 | 873 | |
0037b49e | 874 | fuid_dirtied = zfsvfs->z_fuid_dirty; |
ace1eae8 | 875 | if (fuid_dirtied) |
0037b49e BB |
876 | zfs_fuid_txhold(zfsvfs, tx); |
877 | if (!zfsvfs->z_use_sa && | |
ace1eae8 CC |
878 | acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
879 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, | |
880 | 0, acl_ids.z_aclp->z_acl_bytes); | |
881 | } | |
0735ecb3 | 882 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
ace1eae8 CC |
883 | if (error) { |
884 | if (error == ERESTART) { | |
885 | waited = B_TRUE; | |
886 | dmu_tx_wait(tx); | |
887 | dmu_tx_abort(tx); | |
888 | goto top; | |
889 | } | |
890 | zfs_acl_ids_free(&acl_ids); | |
891 | dmu_tx_abort(tx); | |
768eaced | 892 | zfs_exit(zfsvfs, FTAG); |
ace1eae8 CC |
893 | return (error); |
894 | } | |
895 | zfs_mknode(dzp, vap, tx, cr, IS_TMPFILE, &zp, &acl_ids); | |
896 | ||
897 | if (fuid_dirtied) | |
0037b49e | 898 | zfs_fuid_sync(zfsvfs, tx); |
ace1eae8 CC |
899 | |
900 | /* Add to unlinked set */ | |
a43570c5 | 901 | zp->z_unlinked = B_TRUE; |
ace1eae8 CC |
902 | zfs_unlinked_add(zp, tx); |
903 | zfs_acl_ids_free(&acl_ids); | |
904 | dmu_tx_commit(tx); | |
905 | out: | |
906 | ||
907 | if (error) { | |
908 | if (zp) | |
657ce253 | 909 | zrele(zp); |
ace1eae8 | 910 | } else { |
fc273894 KHN |
911 | zfs_znode_update_vfs(dzp); |
912 | zfs_znode_update_vfs(zp); | |
ace1eae8 CC |
913 | *ipp = ZTOI(zp); |
914 | } | |
915 | ||
768eaced | 916 | zfs_exit(zfsvfs, FTAG); |
ace1eae8 CC |
917 | return (error); |
918 | } | |
919 | ||
34dc7c2f BB |
920 | /* |
921 | * Remove an entry from a directory. | |
922 | * | |
657ce253 | 923 | * IN: dzp - znode of directory to remove entry from. |
34dc7c2f BB |
924 | * name - name of entry to remove. |
925 | * cr - credentials of caller. | |
841a7a98 | 926 | * flags - case flags. |
34dc7c2f BB |
927 | * |
928 | * RETURN: 0 if success | |
929 | * error code if failure | |
930 | * | |
931 | * Timestamps: | |
657ce253 | 932 | * dzp - ctime|mtime |
3558fd73 | 933 | * ip - ctime (if nlink > 0) |
34dc7c2f | 934 | */ |
428870ff | 935 | |
51c747de | 936 | static uint64_t null_xattr = 0; |
428870ff | 937 | |
e5c39b95 | 938 | int |
657ce253 | 939 | zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags) |
34dc7c2f | 940 | { |
657ce253 | 941 | znode_t *zp; |
572e2857 | 942 | znode_t *xzp; |
657ce253 | 943 | zfsvfs_t *zfsvfs = ZTOZSB(dzp); |
34dc7c2f | 944 | zilog_t *zilog; |
a966c564 | 945 | uint64_t acl_obj, xattr_obj; |
3558fd73 | 946 | uint64_t xattr_obj_unlinked = 0; |
572e2857 | 947 | uint64_t obj = 0; |
dfbc8630 | 948 | uint64_t links; |
34dc7c2f BB |
949 | zfs_dirlock_t *dl; |
950 | dmu_tx_t *tx; | |
a966c564 K |
951 | boolean_t may_delete_now, delete_now = FALSE; |
952 | boolean_t unlinked, toobig = FALSE; | |
34dc7c2f BB |
953 | uint64_t txtype; |
954 | pathname_t *realnmp = NULL; | |
955 | pathname_t realnm; | |
956 | int error; | |
957 | int zflg = ZEXISTS; | |
e8b96c60 | 958 | boolean_t waited = B_FALSE; |
34dc7c2f | 959 | |
32dec7bd | 960 | if (name == NULL) |
961 | return (SET_ERROR(EINVAL)); | |
962 | ||
768eaced CC |
963 | if ((error = zfs_enter_verify_zp(zfsvfs, dzp, FTAG)) != 0) |
964 | return (error); | |
0037b49e | 965 | zilog = zfsvfs->z_log; |
34dc7c2f BB |
966 | |
967 | if (flags & FIGNORECASE) { | |
968 | zflg |= ZCILOOK; | |
969 | pn_alloc(&realnm); | |
970 | realnmp = &realnm; | |
971 | } | |
972 | ||
973 | top: | |
572e2857 BB |
974 | xattr_obj = 0; |
975 | xzp = NULL; | |
34dc7c2f BB |
976 | /* |
977 | * Attempt to lock directory; fail if entry doesn't exist. | |
978 | */ | |
149e873a BB |
979 | if ((error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, |
980 | NULL, realnmp))) { | |
34dc7c2f BB |
981 | if (realnmp) |
982 | pn_free(realnmp); | |
768eaced | 983 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
984 | return (error); |
985 | } | |
986 | ||
d4dc53da | 987 | if ((error = zfs_zaccess_delete(dzp, zp, cr, zfs_init_idmap))) { |
34dc7c2f BB |
988 | goto out; |
989 | } | |
990 | ||
991 | /* | |
992 | * Need to use rmdir for removing directories. | |
993 | */ | |
657ce253 | 994 | if (S_ISDIR(ZTOI(zp)->i_mode)) { |
2e528b49 | 995 | error = SET_ERROR(EPERM); |
34dc7c2f BB |
996 | goto out; |
997 | } | |
998 | ||
19d55079 | 999 | mutex_enter(&zp->z_lock); |
657ce253 | 1000 | may_delete_now = atomic_read(&ZTOI(zp)->i_count) == 1 && |
3fc92adc | 1001 | !zn_has_cached_data(zp, 0, LLONG_MAX); |
19d55079 MA |
1002 | mutex_exit(&zp->z_lock); |
1003 | ||
34dc7c2f | 1004 | /* |
a966c564 K |
1005 | * We may delete the znode now, or we may put it in the unlinked set; |
1006 | * it depends on whether we're the last link, and on whether there are | |
1007 | * other holds on the inode. So we dmu_tx_hold() the right things to | |
1008 | * allow for either case. | |
34dc7c2f | 1009 | */ |
572e2857 | 1010 | obj = zp->z_id; |
0037b49e | 1011 | tx = dmu_tx_create(zfsvfs->z_os); |
34dc7c2f | 1012 | dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); |
428870ff BB |
1013 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
1014 | zfs_sa_upgrade_txholds(tx, zp); | |
1015 | zfs_sa_upgrade_txholds(tx, dzp); | |
a966c564 K |
1016 | if (may_delete_now) { |
1017 | toobig = zp->z_size > zp->z_blksz * zfs_delete_blocks; | |
1018 | /* if the file is too big, only hold_free a token amount */ | |
1019 | dmu_tx_hold_free(tx, zp->z_id, 0, | |
1020 | (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); | |
1021 | } | |
34dc7c2f BB |
1022 | |
1023 | /* are there any extended attributes? */ | |
0037b49e | 1024 | error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), |
428870ff | 1025 | &xattr_obj, sizeof (xattr_obj)); |
572e2857 | 1026 | if (error == 0 && xattr_obj) { |
0037b49e | 1027 | error = zfs_zget(zfsvfs, xattr_obj, &xzp); |
c99c9001 | 1028 | ASSERT0(error); |
428870ff BB |
1029 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); |
1030 | dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE); | |
34dc7c2f BB |
1031 | } |
1032 | ||
a966c564 K |
1033 | mutex_enter(&zp->z_lock); |
1034 | if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now) | |
1035 | dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); | |
1036 | mutex_exit(&zp->z_lock); | |
1037 | ||
34dc7c2f | 1038 | /* charge as an update -- would be nice not to charge at all */ |
0037b49e | 1039 | dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
34dc7c2f | 1040 | |
19d55079 | 1041 | /* |
1a04bab3 | 1042 | * Mark this transaction as typically resulting in a net free of space |
19d55079 | 1043 | */ |
1a04bab3 | 1044 | dmu_tx_mark_netfree(tx); |
19d55079 | 1045 | |
0735ecb3 | 1046 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
1047 | if (error) { |
1048 | zfs_dirent_unlock(dl); | |
fb5f0bc8 | 1049 | if (error == ERESTART) { |
e8b96c60 | 1050 | waited = B_TRUE; |
34dc7c2f BB |
1051 | dmu_tx_wait(tx); |
1052 | dmu_tx_abort(tx); | |
657ce253 | 1053 | zrele(zp); |
ea7e86d8 | 1054 | if (xzp) |
657ce253 | 1055 | zrele(xzp); |
34dc7c2f BB |
1056 | goto top; |
1057 | } | |
1058 | if (realnmp) | |
1059 | pn_free(realnmp); | |
1060 | dmu_tx_abort(tx); | |
657ce253 | 1061 | zrele(zp); |
ea7e86d8 | 1062 | if (xzp) |
657ce253 | 1063 | zrele(xzp); |
768eaced | 1064 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1065 | return (error); |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * Remove the directory entry. | |
1070 | */ | |
1071 | error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); | |
1072 | ||
1073 | if (error) { | |
1074 | dmu_tx_commit(tx); | |
1075 | goto out; | |
1076 | } | |
1077 | ||
1078 | if (unlinked) { | |
572e2857 BB |
1079 | /* |
1080 | * Hold z_lock so that we can make sure that the ACL obj | |
1081 | * hasn't changed. Could have been deleted due to | |
1082 | * zfs_sa_upgrade(). | |
1083 | */ | |
1084 | mutex_enter(&zp->z_lock); | |
0037b49e | 1085 | (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), |
428870ff | 1086 | &xattr_obj_unlinked, sizeof (xattr_obj_unlinked)); |
a966c564 | 1087 | delete_now = may_delete_now && !toobig && |
657ce253 | 1088 | atomic_read(&ZTOI(zp)->i_count) == 1 && |
3fc92adc BB |
1089 | !zn_has_cached_data(zp, 0, LLONG_MAX) && |
1090 | xattr_obj == xattr_obj_unlinked && | |
657ce253 | 1091 | zfs_external_acl(zp) == acl_obj; |
66a38fd1 | 1092 | VERIFY_IMPLY(xattr_obj_unlinked, xzp); |
a966c564 K |
1093 | } |
1094 | ||
1095 | if (delete_now) { | |
1096 | if (xattr_obj_unlinked) { | |
dfbc8630 | 1097 | ASSERT3U(ZTOI(xzp)->i_nlink, ==, 2); |
a966c564 | 1098 | mutex_enter(&xzp->z_lock); |
a43570c5 | 1099 | xzp->z_unlinked = B_TRUE; |
dfbc8630 CD |
1100 | clear_nlink(ZTOI(xzp)); |
1101 | links = 0; | |
0037b49e | 1102 | error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs), |
dfbc8630 | 1103 | &links, sizeof (links), tx); |
a966c564 K |
1104 | ASSERT3U(error, ==, 0); |
1105 | mutex_exit(&xzp->z_lock); | |
1106 | zfs_unlinked_add(xzp, tx); | |
1107 | ||
1108 | if (zp->z_is_sa) | |
1109 | error = sa_remove(zp->z_sa_hdl, | |
0037b49e | 1110 | SA_ZPL_XATTR(zfsvfs), tx); |
a966c564 K |
1111 | else |
1112 | error = sa_update(zp->z_sa_hdl, | |
0037b49e | 1113 | SA_ZPL_XATTR(zfsvfs), &null_xattr, |
a966c564 K |
1114 | sizeof (uint64_t), tx); |
1115 | ASSERT0(error); | |
1116 | } | |
1117 | /* | |
1118 | * Add to the unlinked set because a new reference could be | |
1119 | * taken concurrently resulting in a deferred destruction. | |
1120 | */ | |
1121 | zfs_unlinked_add(zp, tx); | |
1122 | mutex_exit(&zp->z_lock); | |
a966c564 | 1123 | } else if (unlinked) { |
572e2857 | 1124 | mutex_exit(&zp->z_lock); |
34dc7c2f BB |
1125 | zfs_unlinked_add(zp, tx); |
1126 | } | |
1127 | ||
1128 | txtype = TX_REMOVE; | |
1129 | if (flags & FIGNORECASE) | |
1130 | txtype |= TX_CI; | |
8e556c5e | 1131 | zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked); |
34dc7c2f BB |
1132 | |
1133 | dmu_tx_commit(tx); | |
1134 | out: | |
1135 | if (realnmp) | |
1136 | pn_free(realnmp); | |
1137 | ||
1138 | zfs_dirent_unlock(dl); | |
fc273894 KHN |
1139 | zfs_znode_update_vfs(dzp); |
1140 | zfs_znode_update_vfs(zp); | |
34dc7c2f | 1141 | |
ea7e86d8 | 1142 | if (delete_now) |
657ce253 | 1143 | zrele(zp); |
ea7e86d8 | 1144 | else |
657ce253 | 1145 | zfs_zrele_async(zp); |
a966c564 K |
1146 | |
1147 | if (xzp) { | |
fc273894 | 1148 | zfs_znode_update_vfs(xzp); |
657ce253 | 1149 | zfs_zrele_async(xzp); |
a966c564 | 1150 | } |
428870ff | 1151 | |
0037b49e | 1152 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 1153 | zil_commit(zilog, 0); |
34dc7c2f | 1154 | |
768eaced | 1155 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1156 | return (error); |
1157 | } | |
1158 | ||
1159 | /* | |
657ce253 | 1160 | * Create a new directory and insert it into dzp using the name |
34dc7c2f BB |
1161 | * provided. Return a pointer to the inserted directory. |
1162 | * | |
657ce253 | 1163 | * IN: dzp - znode of directory to add subdir to. |
34dc7c2f BB |
1164 | * dirname - name of new directory. |
1165 | * vap - attributes of new directory. | |
1166 | * cr - credentials of caller. | |
841a7a98 | 1167 | * flags - case flags. |
34dc7c2f | 1168 | * vsecp - ACL to be set |
2a068a13 | 1169 | * mnt_ns - user namespace of the mount |
34dc7c2f | 1170 | * |
657ce253 | 1171 | * OUT: zpp - znode of created directory. |
34dc7c2f BB |
1172 | * |
1173 | * RETURN: 0 if success | |
1174 | * error code if failure | |
1175 | * | |
1176 | * Timestamps: | |
657ce253 MM |
1177 | * dzp - ctime|mtime updated |
1178 | * zpp - ctime|mtime|atime updated | |
34dc7c2f | 1179 | */ |
e5c39b95 | 1180 | int |
657ce253 | 1181 | zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap, znode_t **zpp, |
d4dc53da | 1182 | cred_t *cr, int flags, vsecattr_t *vsecp, zidmap_t *mnt_ns) |
34dc7c2f | 1183 | { |
657ce253 MM |
1184 | znode_t *zp; |
1185 | zfsvfs_t *zfsvfs = ZTOZSB(dzp); | |
34dc7c2f BB |
1186 | zilog_t *zilog; |
1187 | zfs_dirlock_t *dl; | |
1188 | uint64_t txtype; | |
1189 | dmu_tx_t *tx; | |
1190 | int error; | |
34dc7c2f | 1191 | int zf = ZNEW; |
b128c09f BB |
1192 | uid_t uid; |
1193 | gid_t gid = crgetgid(cr); | |
428870ff | 1194 | zfs_acl_ids_t acl_ids; |
9babb374 | 1195 | boolean_t fuid_dirtied; |
e8b96c60 | 1196 | boolean_t waited = B_FALSE; |
34dc7c2f | 1197 | |
3558fd73 | 1198 | ASSERT(S_ISDIR(vap->va_mode)); |
34dc7c2f BB |
1199 | |
1200 | /* | |
1201 | * If we have an ephemeral id, ACL, or XVATTR then | |
1202 | * make sure file system is at proper version | |
1203 | */ | |
1204 | ||
3558fd73 | 1205 | uid = crgetuid(cr); |
0037b49e | 1206 | if (zfsvfs->z_use_fuids == B_FALSE && |
3558fd73 | 1207 | (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) |
2e528b49 | 1208 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1209 | |
32dec7bd | 1210 | if (dirname == NULL) |
1211 | return (SET_ERROR(EINVAL)); | |
1212 | ||
768eaced CC |
1213 | if ((error = zfs_enter_verify_zp(zfsvfs, dzp, FTAG)) != 0) |
1214 | return (error); | |
0037b49e | 1215 | zilog = zfsvfs->z_log; |
34dc7c2f | 1216 | |
428870ff | 1217 | if (dzp->z_pflags & ZFS_XATTR) { |
768eaced | 1218 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 1219 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1220 | } |
1221 | ||
0037b49e | 1222 | if (zfsvfs->z_utf8 && u8_validate(dirname, |
34dc7c2f | 1223 | strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
768eaced | 1224 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 1225 | return (SET_ERROR(EILSEQ)); |
34dc7c2f BB |
1226 | } |
1227 | if (flags & FIGNORECASE) | |
1228 | zf |= ZCILOOK; | |
1229 | ||
5484965a | 1230 | if (vap->va_mask & ATTR_XVATTR) { |
34dc7c2f | 1231 | if ((error = secpolicy_xvattr((xvattr_t *)vap, |
3558fd73 | 1232 | crgetuid(cr), cr, vap->va_mode)) != 0) { |
768eaced | 1233 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1234 | return (error); |
1235 | } | |
428870ff | 1236 | } |
34dc7c2f | 1237 | |
428870ff | 1238 | if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, |
2a068a13 | 1239 | vsecp, &acl_ids, mnt_ns)) != 0) { |
768eaced | 1240 | zfs_exit(zfsvfs, FTAG); |
428870ff BB |
1241 | return (error); |
1242 | } | |
34dc7c2f BB |
1243 | /* |
1244 | * First make sure the new directory doesn't exist. | |
428870ff BB |
1245 | * |
1246 | * Existence is checked first to make sure we don't return | |
1247 | * EACCES instead of EEXIST which can cause some applications | |
1248 | * to fail. | |
34dc7c2f BB |
1249 | */ |
1250 | top: | |
657ce253 | 1251 | *zpp = NULL; |
34dc7c2f | 1252 | |
149e873a BB |
1253 | if ((error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, |
1254 | NULL, NULL))) { | |
428870ff | 1255 | zfs_acl_ids_free(&acl_ids); |
768eaced | 1256 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1257 | return (error); |
1258 | } | |
1259 | ||
2a068a13 YY |
1260 | if ((error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr, |
1261 | mnt_ns))) { | |
428870ff | 1262 | zfs_acl_ids_free(&acl_ids); |
34dc7c2f | 1263 | zfs_dirent_unlock(dl); |
768eaced | 1264 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1265 | return (error); |
1266 | } | |
1267 | ||
9c5167d1 | 1268 | if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) { |
45d1cae3 | 1269 | zfs_acl_ids_free(&acl_ids); |
9babb374 | 1270 | zfs_dirent_unlock(dl); |
768eaced | 1271 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 1272 | return (SET_ERROR(EDQUOT)); |
9babb374 BB |
1273 | } |
1274 | ||
34dc7c2f BB |
1275 | /* |
1276 | * Add a new entry to the directory. | |
1277 | */ | |
0037b49e | 1278 | tx = dmu_tx_create(zfsvfs->z_os); |
34dc7c2f BB |
1279 | dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); |
1280 | dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); | |
0037b49e | 1281 | fuid_dirtied = zfsvfs->z_fuid_dirty; |
9babb374 | 1282 | if (fuid_dirtied) |
0037b49e BB |
1283 | zfs_fuid_txhold(zfsvfs, tx); |
1284 | if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { | |
428870ff BB |
1285 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, |
1286 | acl_ids.z_aclp->z_acl_bytes); | |
1287 | } | |
1288 | ||
1289 | dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + | |
1290 | ZFS_SA_BASE_ATTR_SIZE); | |
1291 | ||
0735ecb3 | 1292 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
1293 | if (error) { |
1294 | zfs_dirent_unlock(dl); | |
fb5f0bc8 | 1295 | if (error == ERESTART) { |
e8b96c60 | 1296 | waited = B_TRUE; |
34dc7c2f BB |
1297 | dmu_tx_wait(tx); |
1298 | dmu_tx_abort(tx); | |
1299 | goto top; | |
1300 | } | |
428870ff | 1301 | zfs_acl_ids_free(&acl_ids); |
34dc7c2f | 1302 | dmu_tx_abort(tx); |
768eaced | 1303 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1304 | return (error); |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Create new node. | |
1309 | */ | |
428870ff | 1310 | zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); |
34dc7c2f BB |
1311 | |
1312 | /* | |
1313 | * Now put new name in parent dir. | |
1314 | */ | |
599b8648 CC |
1315 | error = zfs_link_create(dl, zp, tx, ZNEW); |
1316 | if (error != 0) { | |
1317 | zfs_znode_delete(zp, tx); | |
1318 | remove_inode_hash(ZTOI(zp)); | |
1319 | goto out; | |
1320 | } | |
1321 | ||
1322 | if (fuid_dirtied) | |
1323 | zfs_fuid_sync(zfsvfs, tx); | |
34dc7c2f | 1324 | |
657ce253 | 1325 | *zpp = zp; |
34dc7c2f BB |
1326 | |
1327 | txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); | |
1328 | if (flags & FIGNORECASE) | |
1329 | txtype |= TX_CI; | |
9babb374 BB |
1330 | zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, |
1331 | acl_ids.z_fuidp, vap); | |
34dc7c2f | 1332 | |
599b8648 | 1333 | out: |
9babb374 | 1334 | zfs_acl_ids_free(&acl_ids); |
428870ff | 1335 | |
34dc7c2f BB |
1336 | dmu_tx_commit(tx); |
1337 | ||
1338 | zfs_dirent_unlock(dl); | |
1339 | ||
0037b49e | 1340 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 1341 | zil_commit(zilog, 0); |
428870ff | 1342 | |
599b8648 | 1343 | if (error != 0) { |
657ce253 | 1344 | zrele(zp); |
599b8648 | 1345 | } else { |
fc273894 KHN |
1346 | zfs_znode_update_vfs(dzp); |
1347 | zfs_znode_update_vfs(zp); | |
599b8648 | 1348 | } |
768eaced | 1349 | zfs_exit(zfsvfs, FTAG); |
599b8648 | 1350 | return (error); |
34dc7c2f BB |
1351 | } |
1352 | ||
1353 | /* | |
1354 | * Remove a directory subdir entry. If the current working | |
1355 | * directory is the same as the subdir to be removed, the | |
1356 | * remove will fail. | |
1357 | * | |
657ce253 | 1358 | * IN: dzp - znode of directory to remove from. |
34dc7c2f | 1359 | * name - name of directory to be removed. |
3558fd73 | 1360 | * cwd - inode of current working directory. |
34dc7c2f | 1361 | * cr - credentials of caller. |
34dc7c2f BB |
1362 | * flags - case flags |
1363 | * | |
d3cc8b15 | 1364 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
1365 | * |
1366 | * Timestamps: | |
657ce253 | 1367 | * dzp - ctime|mtime updated |
34dc7c2f | 1368 | */ |
e5c39b95 | 1369 | int |
657ce253 | 1370 | zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd, cred_t *cr, |
3558fd73 | 1371 | int flags) |
34dc7c2f | 1372 | { |
34dc7c2f | 1373 | znode_t *zp; |
657ce253 | 1374 | zfsvfs_t *zfsvfs = ZTOZSB(dzp); |
34dc7c2f BB |
1375 | zilog_t *zilog; |
1376 | zfs_dirlock_t *dl; | |
1377 | dmu_tx_t *tx; | |
1378 | int error; | |
1379 | int zflg = ZEXISTS; | |
e8b96c60 | 1380 | boolean_t waited = B_FALSE; |
34dc7c2f | 1381 | |
32dec7bd | 1382 | if (name == NULL) |
1383 | return (SET_ERROR(EINVAL)); | |
1384 | ||
768eaced CC |
1385 | if ((error = zfs_enter_verify_zp(zfsvfs, dzp, FTAG)) != 0) |
1386 | return (error); | |
0037b49e | 1387 | zilog = zfsvfs->z_log; |
34dc7c2f BB |
1388 | |
1389 | if (flags & FIGNORECASE) | |
1390 | zflg |= ZCILOOK; | |
1391 | top: | |
1392 | zp = NULL; | |
1393 | ||
1394 | /* | |
1395 | * Attempt to lock directory; fail if entry doesn't exist. | |
1396 | */ | |
149e873a BB |
1397 | if ((error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, |
1398 | NULL, NULL))) { | |
768eaced | 1399 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1400 | return (error); |
1401 | } | |
1402 | ||
d4dc53da | 1403 | if ((error = zfs_zaccess_delete(dzp, zp, cr, zfs_init_idmap))) { |
34dc7c2f BB |
1404 | goto out; |
1405 | } | |
1406 | ||
657ce253 | 1407 | if (!S_ISDIR(ZTOI(zp)->i_mode)) { |
2e528b49 | 1408 | error = SET_ERROR(ENOTDIR); |
34dc7c2f BB |
1409 | goto out; |
1410 | } | |
1411 | ||
657ce253 | 1412 | if (zp == cwd) { |
2e528b49 | 1413 | error = SET_ERROR(EINVAL); |
34dc7c2f BB |
1414 | goto out; |
1415 | } | |
1416 | ||
34dc7c2f | 1417 | /* |
4e33ba4c | 1418 | * Grab a lock on the directory to make sure that no one is |
34dc7c2f BB |
1419 | * trying to add (or lookup) entries while we are removing it. |
1420 | */ | |
1421 | rw_enter(&zp->z_name_lock, RW_WRITER); | |
1422 | ||
1423 | /* | |
1424 | * Grab a lock on the parent pointer to make sure we play well | |
1425 | * with the treewalk and directory rename code. | |
1426 | */ | |
1427 | rw_enter(&zp->z_parent_lock, RW_WRITER); | |
1428 | ||
0037b49e | 1429 | tx = dmu_tx_create(zfsvfs->z_os); |
34dc7c2f | 1430 | dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); |
428870ff | 1431 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
0037b49e | 1432 | dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
428870ff BB |
1433 | zfs_sa_upgrade_txholds(tx, zp); |
1434 | zfs_sa_upgrade_txholds(tx, dzp); | |
db707ad0 | 1435 | dmu_tx_mark_netfree(tx); |
0735ecb3 | 1436 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
1437 | if (error) { |
1438 | rw_exit(&zp->z_parent_lock); | |
1439 | rw_exit(&zp->z_name_lock); | |
1440 | zfs_dirent_unlock(dl); | |
fb5f0bc8 | 1441 | if (error == ERESTART) { |
e8b96c60 | 1442 | waited = B_TRUE; |
34dc7c2f BB |
1443 | dmu_tx_wait(tx); |
1444 | dmu_tx_abort(tx); | |
657ce253 | 1445 | zrele(zp); |
34dc7c2f BB |
1446 | goto top; |
1447 | } | |
1448 | dmu_tx_abort(tx); | |
657ce253 | 1449 | zrele(zp); |
768eaced | 1450 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1451 | return (error); |
1452 | } | |
1453 | ||
1454 | error = zfs_link_destroy(dl, zp, tx, zflg, NULL); | |
1455 | ||
1456 | if (error == 0) { | |
1457 | uint64_t txtype = TX_RMDIR; | |
1458 | if (flags & FIGNORECASE) | |
1459 | txtype |= TX_CI; | |
8e556c5e CC |
1460 | zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT, |
1461 | B_FALSE); | |
34dc7c2f BB |
1462 | } |
1463 | ||
1464 | dmu_tx_commit(tx); | |
1465 | ||
1466 | rw_exit(&zp->z_parent_lock); | |
1467 | rw_exit(&zp->z_name_lock); | |
1468 | out: | |
1469 | zfs_dirent_unlock(dl); | |
1470 | ||
fc273894 KHN |
1471 | zfs_znode_update_vfs(dzp); |
1472 | zfs_znode_update_vfs(zp); | |
657ce253 | 1473 | zrele(zp); |
34dc7c2f | 1474 | |
0037b49e | 1475 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 1476 | zil_commit(zilog, 0); |
428870ff | 1477 | |
768eaced | 1478 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
1479 | return (error); |
1480 | } | |
1481 | ||
1482 | /* | |
841a7a98 TK |
1483 | * Read directory entries from the given directory cursor position and emit |
1484 | * name and position for each entry. | |
34dc7c2f | 1485 | * |
3558fd73 | 1486 | * IN: ip - inode of directory to read. |
841a7a98 TK |
1487 | * ctx - directory entry context. |
1488 | * cr - credentials of caller. | |
34dc7c2f BB |
1489 | * |
1490 | * RETURN: 0 if success | |
1491 | * error code if failure | |
1492 | * | |
1493 | * Timestamps: | |
3558fd73 | 1494 | * ip - atime updated |
34dc7c2f BB |
1495 | * |
1496 | * Note that the low 4 bits of the cookie returned by zap is always zero. | |
1497 | * This allows us to use the low range for "special" directory entries: | |
1498 | * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, | |
1499 | * we use the offset 2 for the '.zfs' directory. | |
1500 | */ | |
3558fd73 | 1501 | int |
9464b959 | 1502 | zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr) |
34dc7c2f | 1503 | { |
ef70eff1 | 1504 | (void) cr; |
3558fd73 | 1505 | znode_t *zp = ITOZ(ip); |
0037b49e | 1506 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
34dc7c2f | 1507 | objset_t *os; |
34dc7c2f BB |
1508 | zap_cursor_t zc; |
1509 | zap_attribute_t zap; | |
34dc7c2f BB |
1510 | int error; |
1511 | uint8_t prefetch; | |
c12e3a59 | 1512 | uint8_t type; |
3558fd73 BB |
1513 | int done = 0; |
1514 | uint64_t parent; | |
c12e3a59 | 1515 | uint64_t offset; /* must be unsigned; checks for < 1 */ |
34dc7c2f | 1516 | |
768eaced CC |
1517 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
1518 | return (error); | |
34dc7c2f | 1519 | |
0037b49e | 1520 | if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), |
3558fd73 BB |
1521 | &parent, sizeof (parent))) != 0) |
1522 | goto out; | |
34dc7c2f BB |
1523 | |
1524 | /* | |
1525 | * Quit if directory has been removed (posix) | |
1526 | */ | |
3558fd73 BB |
1527 | if (zp->z_unlinked) |
1528 | goto out; | |
1529 | ||
c12e3a59 | 1530 | error = 0; |
0037b49e | 1531 | os = zfsvfs->z_os; |
c12e3a59 | 1532 | offset = ctx->pos; |
34dc7c2f BB |
1533 | prefetch = zp->z_zn_prefetch; |
1534 | ||
1535 | /* | |
1536 | * Initialize the iterator cursor. | |
1537 | */ | |
c12e3a59 | 1538 | if (offset <= 3) { |
34dc7c2f BB |
1539 | /* |
1540 | * Start iteration from the beginning of the directory. | |
1541 | */ | |
1542 | zap_cursor_init(&zc, os, zp->z_id); | |
1543 | } else { | |
1544 | /* | |
1545 | * The offset is a serialized cursor. | |
1546 | */ | |
c12e3a59 | 1547 | zap_cursor_init_serialized(&zc, os, zp->z_id, offset); |
34dc7c2f BB |
1548 | } |
1549 | ||
34dc7c2f BB |
1550 | /* |
1551 | * Transform to file-system independent format | |
1552 | */ | |
3558fd73 BB |
1553 | while (!done) { |
1554 | uint64_t objnum; | |
34dc7c2f BB |
1555 | /* |
1556 | * Special case `.', `..', and `.zfs'. | |
1557 | */ | |
c12e3a59 | 1558 | if (offset == 0) { |
34dc7c2f BB |
1559 | (void) strcpy(zap.za_name, "."); |
1560 | zap.za_normalization_conflict = 0; | |
1561 | objnum = zp->z_id; | |
c12e3a59 RY |
1562 | type = DT_DIR; |
1563 | } else if (offset == 1) { | |
34dc7c2f BB |
1564 | (void) strcpy(zap.za_name, ".."); |
1565 | zap.za_normalization_conflict = 0; | |
428870ff | 1566 | objnum = parent; |
c12e3a59 RY |
1567 | type = DT_DIR; |
1568 | } else if (offset == 2 && zfs_show_ctldir(zp)) { | |
34dc7c2f BB |
1569 | (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); |
1570 | zap.za_normalization_conflict = 0; | |
1571 | objnum = ZFSCTL_INO_ROOT; | |
c12e3a59 | 1572 | type = DT_DIR; |
34dc7c2f BB |
1573 | } else { |
1574 | /* | |
1575 | * Grab next entry. | |
1576 | */ | |
3558fd73 BB |
1577 | if ((error = zap_cursor_retrieve(&zc, &zap))) { |
1578 | if (error == ENOENT) | |
34dc7c2f BB |
1579 | break; |
1580 | else | |
1581 | goto update; | |
1582 | } | |
1583 | ||
0c5dde49 BB |
1584 | /* |
1585 | * Allow multiple entries provided the first entry is | |
1586 | * the object id. Non-zpl consumers may safely make | |
1587 | * use of the additional space. | |
1588 | * | |
1589 | * XXX: This should be a feature flag for compatibility | |
1590 | */ | |
34dc7c2f | 1591 | if (zap.za_integer_length != 8 || |
0c5dde49 | 1592 | zap.za_num_integers == 0) { |
34dc7c2f | 1593 | cmn_err(CE_WARN, "zap_readdir: bad directory " |
0c5dde49 BB |
1594 | "entry, obj = %lld, offset = %lld, " |
1595 | "length = %d, num = %lld\n", | |
34dc7c2f | 1596 | (u_longlong_t)zp->z_id, |
c12e3a59 | 1597 | (u_longlong_t)offset, |
0c5dde49 BB |
1598 | zap.za_integer_length, |
1599 | (u_longlong_t)zap.za_num_integers); | |
2e528b49 | 1600 | error = SET_ERROR(ENXIO); |
34dc7c2f BB |
1601 | goto update; |
1602 | } | |
1603 | ||
1604 | objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); | |
c12e3a59 | 1605 | type = ZFS_DIRENT_TYPE(zap.za_first_integer); |
34dc7c2f | 1606 | } |
0f37d0c8 | 1607 | |
9464b959 | 1608 | done = !zpl_dir_emit(ctx, zap.za_name, strlen(zap.za_name), |
c12e3a59 | 1609 | objnum, type); |
0f37d0c8 | 1610 | if (done) |
34dc7c2f | 1611 | break; |
34dc7c2f BB |
1612 | |
1613 | /* Prefetch znode */ | |
3558fd73 | 1614 | if (prefetch) { |
fcff0f35 PD |
1615 | dmu_prefetch(os, objnum, 0, 0, 0, |
1616 | ZIO_PRIORITY_SYNC_READ); | |
3558fd73 | 1617 | } |
34dc7c2f | 1618 | |
c12e3a59 RY |
1619 | /* |
1620 | * Move to the next entry, fill in the previous offset. | |
1621 | */ | |
1622 | if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { | |
34dc7c2f | 1623 | zap_cursor_advance(&zc); |
c12e3a59 | 1624 | offset = zap_cursor_serialize(&zc); |
34dc7c2f | 1625 | } else { |
c12e3a59 | 1626 | offset += 1; |
34dc7c2f | 1627 | } |
c12e3a59 | 1628 | ctx->pos = offset; |
34dc7c2f BB |
1629 | } |
1630 | zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ | |
1631 | ||
34dc7c2f BB |
1632 | update: |
1633 | zap_cursor_fini(&zc); | |
34dc7c2f BB |
1634 | if (error == ENOENT) |
1635 | error = 0; | |
3558fd73 | 1636 | out: |
768eaced | 1637 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f | 1638 | |
34dc7c2f BB |
1639 | return (error); |
1640 | } | |
1641 | ||
057e8eee BB |
1642 | /* |
1643 | * Get the basic file attributes and place them in the provided kstat | |
1644 | * structure. The inode is assumed to be the authoritative source | |
1645 | * for most of the attributes. However, the znode currently has the | |
1646 | * authoritative atime, blksize, and block count. | |
1647 | * | |
1648 | * IN: ip - inode of file. | |
1649 | * | |
1650 | * OUT: sp - kstat values. | |
1651 | * | |
1652 | * RETURN: 0 (always succeeds) | |
1653 | */ | |
057e8eee | 1654 | int |
d4dc53da | 1655 | zfs_getattr_fast(zidmap_t *user_ns, struct inode *ip, struct kstat *sp) |
057e8eee BB |
1656 | { |
1657 | znode_t *zp = ITOZ(ip); | |
0037b49e | 1658 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
b585bc4a BB |
1659 | uint32_t blksize; |
1660 | u_longlong_t nblocks; | |
768eaced | 1661 | int error; |
057e8eee | 1662 | |
768eaced CC |
1663 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
1664 | return (error); | |
a7b125e9 | 1665 | |
057e8eee BB |
1666 | mutex_enter(&zp->z_lock); |
1667 | ||
e2a82961 | 1668 | zpl_generic_fillattr(user_ns, ip, sp); |
97aa3ba4 TK |
1669 | /* |
1670 | * +1 link count for root inode with visible '.zfs' directory. | |
1671 | */ | |
1672 | if ((zp->z_id == zfsvfs->z_root) && zfs_show_ctldir(zp)) | |
1673 | if (sp->nlink < ZFS_LINK_MAX) | |
1674 | sp->nlink++; | |
057e8eee | 1675 | |
b585bc4a BB |
1676 | sa_object_size(zp->z_sa_hdl, &blksize, &nblocks); |
1677 | sp->blksize = blksize; | |
1678 | sp->blocks = nblocks; | |
1679 | ||
057e8eee BB |
1680 | if (unlikely(zp->z_blksz == 0)) { |
1681 | /* | |
1682 | * Block size hasn't been set; suggest maximal I/O transfers. | |
1683 | */ | |
0037b49e | 1684 | sp->blksize = zfsvfs->z_max_blksz; |
057e8eee BB |
1685 | } |
1686 | ||
1687 | mutex_exit(&zp->z_lock); | |
1688 | ||
aa9b2708 AV |
1689 | /* |
1690 | * Required to prevent NFS client from detecting different inode | |
1691 | * numbers of snapshot root dentry before and after snapshot mount. | |
1692 | */ | |
0037b49e | 1693 | if (zfsvfs->z_issnap) { |
aa9b2708 AV |
1694 | if (ip->i_sb->s_root->d_inode == ip) |
1695 | sp->ino = ZFSCTL_INO_SNAPDIRS - | |
0037b49e | 1696 | dmu_objset_id(zfsvfs->z_os); |
aa9b2708 AV |
1697 | } |
1698 | ||
768eaced | 1699 | zfs_exit(zfsvfs, FTAG); |
a7b125e9 | 1700 | |
057e8eee BB |
1701 | return (0); |
1702 | } | |
057e8eee | 1703 | |
9c5167d1 NF |
1704 | /* |
1705 | * For the operation of changing file's user/group/project, we need to | |
1706 | * handle not only the main object that is assigned to the file directly, | |
1707 | * but also the ones that are used by the file via hidden xattr directory. | |
1708 | * | |
1709 | * Because the xattr directory may contains many EA entries, as to it may | |
1710 | * be impossible to change all of them via the transaction of changing the | |
1711 | * main object's user/group/project attributes. Then we have to change them | |
1712 | * via other multiple independent transactions one by one. It may be not good | |
1713 | * solution, but we have no better idea yet. | |
1714 | */ | |
1715 | static int | |
1716 | zfs_setattr_dir(znode_t *dzp) | |
1717 | { | |
1718 | struct inode *dxip = ZTOI(dzp); | |
1719 | struct inode *xip = NULL; | |
657ce253 | 1720 | zfsvfs_t *zfsvfs = ZTOZSB(dzp); |
9c5167d1 NF |
1721 | objset_t *os = zfsvfs->z_os; |
1722 | zap_cursor_t zc; | |
1723 | zap_attribute_t zap; | |
1724 | zfs_dirlock_t *dl; | |
b7ab7ae2 | 1725 | znode_t *zp = NULL; |
9c5167d1 NF |
1726 | dmu_tx_t *tx = NULL; |
1727 | uint64_t uid, gid; | |
1728 | sa_bulk_attr_t bulk[4]; | |
8cb34421 | 1729 | int count; |
9c5167d1 NF |
1730 | int err; |
1731 | ||
1732 | zap_cursor_init(&zc, os, dzp->z_id); | |
1733 | while ((err = zap_cursor_retrieve(&zc, &zap)) == 0) { | |
8cb34421 | 1734 | count = 0; |
9c5167d1 NF |
1735 | if (zap.za_integer_length != 8 || zap.za_num_integers != 1) { |
1736 | err = ENXIO; | |
1737 | break; | |
1738 | } | |
1739 | ||
1740 | err = zfs_dirent_lock(&dl, dzp, (char *)zap.za_name, &zp, | |
1741 | ZEXISTS, NULL, NULL); | |
1742 | if (err == ENOENT) | |
1743 | goto next; | |
1744 | if (err) | |
1745 | break; | |
1746 | ||
1747 | xip = ZTOI(zp); | |
1748 | if (KUID_TO_SUID(xip->i_uid) == KUID_TO_SUID(dxip->i_uid) && | |
1749 | KGID_TO_SGID(xip->i_gid) == KGID_TO_SGID(dxip->i_gid) && | |
1750 | zp->z_projid == dzp->z_projid) | |
1751 | goto next; | |
1752 | ||
1753 | tx = dmu_tx_create(os); | |
1754 | if (!(zp->z_pflags & ZFS_PROJID)) | |
1755 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); | |
1756 | else | |
1757 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); | |
1758 | ||
1759 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1760 | if (err) | |
1761 | break; | |
1762 | ||
1763 | mutex_enter(&dzp->z_lock); | |
1764 | ||
1765 | if (KUID_TO_SUID(xip->i_uid) != KUID_TO_SUID(dxip->i_uid)) { | |
1766 | xip->i_uid = dxip->i_uid; | |
1767 | uid = zfs_uid_read(dxip); | |
1768 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, | |
1769 | &uid, sizeof (uid)); | |
1770 | } | |
1771 | ||
1772 | if (KGID_TO_SGID(xip->i_gid) != KGID_TO_SGID(dxip->i_gid)) { | |
1773 | xip->i_gid = dxip->i_gid; | |
1774 | gid = zfs_gid_read(dxip); | |
1775 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, | |
1776 | &gid, sizeof (gid)); | |
1777 | } | |
1778 | ||
1779 | if (zp->z_projid != dzp->z_projid) { | |
1780 | if (!(zp->z_pflags & ZFS_PROJID)) { | |
1781 | zp->z_pflags |= ZFS_PROJID; | |
1782 | SA_ADD_BULK_ATTR(bulk, count, | |
1783 | SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags, | |
1784 | sizeof (zp->z_pflags)); | |
1785 | } | |
1786 | ||
1787 | zp->z_projid = dzp->z_projid; | |
1788 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PROJID(zfsvfs), | |
1789 | NULL, &zp->z_projid, sizeof (zp->z_projid)); | |
1790 | } | |
1791 | ||
1792 | mutex_exit(&dzp->z_lock); | |
1793 | ||
1794 | if (likely(count > 0)) { | |
1795 | err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); | |
1796 | dmu_tx_commit(tx); | |
1797 | } else { | |
1798 | dmu_tx_abort(tx); | |
1799 | } | |
1800 | tx = NULL; | |
1801 | if (err != 0 && err != ENOENT) | |
1802 | break; | |
1803 | ||
1804 | next: | |
657ce253 MM |
1805 | if (zp) { |
1806 | zrele(zp); | |
1807 | zp = NULL; | |
9c5167d1 NF |
1808 | zfs_dirent_unlock(dl); |
1809 | } | |
1810 | zap_cursor_advance(&zc); | |
1811 | } | |
1812 | ||
1813 | if (tx) | |
1814 | dmu_tx_abort(tx); | |
657ce253 MM |
1815 | if (zp) { |
1816 | zrele(zp); | |
9c5167d1 NF |
1817 | zfs_dirent_unlock(dl); |
1818 | } | |
1819 | zap_cursor_fini(&zc); | |
1820 | ||
1821 | return (err == ENOENT ? 0 : err); | |
1822 | } | |
1823 | ||
34dc7c2f BB |
1824 | /* |
1825 | * Set the file attributes to the values contained in the | |
1826 | * vattr structure. | |
1827 | * | |
657ce253 | 1828 | * IN: zp - znode of file to be modified. |
34dc7c2f | 1829 | * vap - new attribute values. |
5484965a | 1830 | * If ATTR_XVATTR set, then optional attrs are being set |
34dc7c2f BB |
1831 | * flags - ATTR_UTIME set if non-default time values provided. |
1832 | * - ATTR_NOACLCHECK (CIFS context only). | |
1833 | * cr - credentials of caller. | |
2a068a13 | 1834 | * mnt_ns - user namespace of the mount |
34dc7c2f BB |
1835 | * |
1836 | * RETURN: 0 if success | |
1837 | * error code if failure | |
1838 | * | |
1839 | * Timestamps: | |
3558fd73 | 1840 | * ip - ctime updated, mtime updated if size changed. |
34dc7c2f | 1841 | */ |
e5c39b95 | 1842 | int |
d4dc53da | 1843 | zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr, zidmap_t *mnt_ns) |
34dc7c2f | 1844 | { |
657ce253 MM |
1845 | struct inode *ip; |
1846 | zfsvfs_t *zfsvfs = ZTOZSB(zp); | |
9c5167d1 | 1847 | objset_t *os = zfsvfs->z_os; |
34dc7c2f BB |
1848 | zilog_t *zilog; |
1849 | dmu_tx_t *tx; | |
1850 | vattr_t oldva; | |
f4ea75d4 | 1851 | xvattr_t *tmpxvattr; |
5484965a | 1852 | uint_t mask = vap->va_mask; |
a117a6d6 | 1853 | uint_t saved_mask = 0; |
34dc7c2f BB |
1854 | int trim_mask = 0; |
1855 | uint64_t new_mode; | |
64aefee1 | 1856 | uint64_t new_kuid = 0, new_kgid = 0, new_uid, new_gid; |
572e2857 | 1857 | uint64_t xattr_obj; |
0df9673f | 1858 | uint64_t mtime[2], ctime[2], atime[2]; |
9c5167d1 | 1859 | uint64_t projid = ZFS_INVALID_PROJID; |
34dc7c2f BB |
1860 | znode_t *attrzp; |
1861 | int need_policy = FALSE; | |
9c5167d1 | 1862 | int err, err2 = 0; |
34dc7c2f | 1863 | zfs_fuid_info_t *fuidp = NULL; |
5484965a BB |
1864 | xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ |
1865 | xoptattr_t *xoap; | |
1866 | zfs_acl_t *aclp; | |
34dc7c2f | 1867 | boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; |
428870ff | 1868 | boolean_t fuid_dirtied = B_FALSE; |
9c5167d1 | 1869 | boolean_t handle_eadir = B_FALSE; |
17c37660 | 1870 | sa_bulk_attr_t *bulk, *xattr_bulk; |
9c5167d1 | 1871 | int count = 0, xattr_count = 0, bulks = 8; |
34dc7c2f BB |
1872 | |
1873 | if (mask == 0) | |
1874 | return (0); | |
1875 | ||
768eaced CC |
1876 | if ((err = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
1877 | return (err); | |
657ce253 | 1878 | ip = ZTOI(zp); |
34dc7c2f | 1879 | |
9c5167d1 NF |
1880 | /* |
1881 | * If this is a xvattr_t, then get a pointer to the structure of | |
1882 | * optional attributes. If this is NULL, then we have a vattr_t. | |
1883 | */ | |
1884 | xoap = xva_getxoptattr(xvap); | |
1885 | if (xoap != NULL && (mask & ATTR_XVATTR)) { | |
1886 | if (XVA_ISSET_REQ(xvap, XAT_PROJID)) { | |
1887 | if (!dmu_objset_projectquota_enabled(os) || | |
1888 | (!S_ISREG(ip->i_mode) && !S_ISDIR(ip->i_mode))) { | |
768eaced | 1889 | zfs_exit(zfsvfs, FTAG); |
9c5167d1 NF |
1890 | return (SET_ERROR(ENOTSUP)); |
1891 | } | |
1892 | ||
1893 | projid = xoap->xoa_projid; | |
1894 | if (unlikely(projid == ZFS_INVALID_PROJID)) { | |
768eaced | 1895 | zfs_exit(zfsvfs, FTAG); |
9c5167d1 NF |
1896 | return (SET_ERROR(EINVAL)); |
1897 | } | |
1898 | ||
1899 | if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID) | |
1900 | projid = ZFS_INVALID_PROJID; | |
1901 | else | |
1902 | need_policy = TRUE; | |
1903 | } | |
1904 | ||
1905 | if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) && | |
2705ebf0 NF |
1906 | (xoap->xoa_projinherit != |
1907 | ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) && | |
9c5167d1 NF |
1908 | (!dmu_objset_projectquota_enabled(os) || |
1909 | (!S_ISREG(ip->i_mode) && !S_ISDIR(ip->i_mode)))) { | |
768eaced | 1910 | zfs_exit(zfsvfs, FTAG); |
2705ebf0 | 1911 | return (SET_ERROR(ENOTSUP)); |
9c5167d1 NF |
1912 | } |
1913 | } | |
1914 | ||
0037b49e | 1915 | zilog = zfsvfs->z_log; |
34dc7c2f BB |
1916 | |
1917 | /* | |
1918 | * Make sure that if we have ephemeral uid/gid or xvattr specified | |
1919 | * that file system is at proper version level | |
1920 | */ | |
5484965a | 1921 | |
0037b49e | 1922 | if (zfsvfs->z_use_fuids == B_FALSE && |
5484965a BB |
1923 | (((mask & ATTR_UID) && IS_EPHEMERAL(vap->va_uid)) || |
1924 | ((mask & ATTR_GID) && IS_EPHEMERAL(vap->va_gid)) || | |
1925 | (mask & ATTR_XVATTR))) { | |
768eaced | 1926 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 1927 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1928 | } |
1929 | ||
3558fd73 | 1930 | if (mask & ATTR_SIZE && S_ISDIR(ip->i_mode)) { |
768eaced | 1931 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 1932 | return (SET_ERROR(EISDIR)); |
34dc7c2f BB |
1933 | } |
1934 | ||
3558fd73 | 1935 | if (mask & ATTR_SIZE && !S_ISREG(ip->i_mode) && !S_ISFIFO(ip->i_mode)) { |
768eaced | 1936 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 1937 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1938 | } |
1939 | ||
d1d7e268 | 1940 | tmpxvattr = kmem_alloc(sizeof (xvattr_t), KM_SLEEP); |
f4ea75d4 | 1941 | xva_init(tmpxvattr); |
5484965a | 1942 | |
9c5167d1 NF |
1943 | bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * bulks, KM_SLEEP); |
1944 | xattr_bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * bulks, KM_SLEEP); | |
17c37660 | 1945 | |
5484965a BB |
1946 | /* |
1947 | * Immutable files can only alter immutable bit and atime | |
1948 | */ | |
1949 | if ((zp->z_pflags & ZFS_IMMUTABLE) && | |
1950 | ((mask & (ATTR_SIZE|ATTR_UID|ATTR_GID|ATTR_MTIME|ATTR_MODE)) || | |
1951 | ((mask & ATTR_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { | |
ecb2b7dc | 1952 | err = SET_ERROR(EPERM); |
f4ea75d4 | 1953 | goto out3; |
5484965a BB |
1954 | } |
1955 | ||
3558fd73 | 1956 | if ((mask & ATTR_SIZE) && (zp->z_pflags & ZFS_READONLY)) { |
ecb2b7dc | 1957 | err = SET_ERROR(EPERM); |
f4ea75d4 | 1958 | goto out3; |
34dc7c2f BB |
1959 | } |
1960 | ||
5484965a BB |
1961 | /* |
1962 | * Verify timestamps doesn't overflow 32 bits. | |
1963 | * ZFS can handle large timestamps, but 32bit syscalls can't | |
1964 | * handle times greater than 2039. This check should be removed | |
1965 | * once large timestamps are fully supported. | |
1966 | */ | |
1967 | if (mask & (ATTR_ATIME | ATTR_MTIME)) { | |
d1d7e268 MK |
1968 | if (((mask & ATTR_ATIME) && |
1969 | TIMESPEC_OVERFLOW(&vap->va_atime)) || | |
1970 | ((mask & ATTR_MTIME) && | |
1971 | TIMESPEC_OVERFLOW(&vap->va_mtime))) { | |
ecb2b7dc | 1972 | err = SET_ERROR(EOVERFLOW); |
f4ea75d4 | 1973 | goto out3; |
5484965a BB |
1974 | } |
1975 | } | |
1976 | ||
34dc7c2f BB |
1977 | top: |
1978 | attrzp = NULL; | |
572e2857 | 1979 | aclp = NULL; |
34dc7c2f | 1980 | |
45d1cae3 | 1981 | /* Can this be moved to before the top label? */ |
0037b49e | 1982 | if (zfs_is_readonly(zfsvfs)) { |
ecb2b7dc | 1983 | err = SET_ERROR(EROFS); |
f4ea75d4 | 1984 | goto out3; |
34dc7c2f BB |
1985 | } |
1986 | ||
1987 | /* | |
1988 | * First validate permissions | |
1989 | */ | |
1990 | ||
3558fd73 | 1991 | if (mask & ATTR_SIZE) { |
2a068a13 YY |
1992 | err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr, |
1993 | mnt_ns); | |
f4ea75d4 BB |
1994 | if (err) |
1995 | goto out3; | |
1996 | ||
34dc7c2f BB |
1997 | /* |
1998 | * XXX - Note, we are not providing any open | |
1999 | * mode flags here (like FNDELAY), so we may | |
2000 | * block if there are locks present... this | |
2001 | * should be addressed in openat(). | |
2002 | */ | |
b128c09f | 2003 | /* XXX - would it be OK to generate a log record here? */ |
5484965a | 2004 | err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); |
f4ea75d4 BB |
2005 | if (err) |
2006 | goto out3; | |
428870ff | 2007 | } |
34dc7c2f | 2008 | |
5484965a BB |
2009 | if (mask & (ATTR_ATIME|ATTR_MTIME) || |
2010 | ((mask & ATTR_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || | |
2011 | XVA_ISSET_REQ(xvap, XAT_READONLY) || | |
2012 | XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || | |
2013 | XVA_ISSET_REQ(xvap, XAT_OFFLINE) || | |
2014 | XVA_ISSET_REQ(xvap, XAT_SPARSE) || | |
2015 | XVA_ISSET_REQ(xvap, XAT_CREATETIME) || | |
2016 | XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) { | |
2017 | need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, | |
2a068a13 | 2018 | skipaclchk, cr, mnt_ns); |
5484965a BB |
2019 | } |
2020 | ||
3558fd73 BB |
2021 | if (mask & (ATTR_UID|ATTR_GID)) { |
2022 | int idmask = (mask & (ATTR_UID|ATTR_GID)); | |
34dc7c2f BB |
2023 | int take_owner; |
2024 | int take_group; | |
2a068a13 YY |
2025 | uid_t uid; |
2026 | gid_t gid; | |
34dc7c2f BB |
2027 | |
2028 | /* | |
2029 | * NOTE: even if a new mode is being set, | |
2030 | * we may clear S_ISUID/S_ISGID bits. | |
2031 | */ | |
2032 | ||
3558fd73 | 2033 | if (!(mask & ATTR_MODE)) |
5484965a | 2034 | vap->va_mode = zp->z_mode; |
34dc7c2f BB |
2035 | |
2036 | /* | |
2037 | * Take ownership or chgrp to group we are a member of | |
2038 | */ | |
2039 | ||
d4dc53da YY |
2040 | uid = zfs_uid_to_vfsuid(mnt_ns, zfs_i_user_ns(ip), |
2041 | vap->va_uid); | |
2042 | gid = zfs_gid_to_vfsgid(mnt_ns, zfs_i_user_ns(ip), | |
2043 | vap->va_gid); | |
2a068a13 | 2044 | take_owner = (mask & ATTR_UID) && (uid == crgetuid(cr)); |
3558fd73 | 2045 | take_group = (mask & ATTR_GID) && |
2a068a13 | 2046 | zfs_groupmember(zfsvfs, gid, cr); |
34dc7c2f BB |
2047 | |
2048 | /* | |
5484965a | 2049 | * If both ATTR_UID and ATTR_GID are set then take_owner and |
34dc7c2f BB |
2050 | * take_group must both be set in order to allow taking |
2051 | * ownership. | |
2052 | * | |
2053 | * Otherwise, send the check through secpolicy_vnode_setattr() | |
2054 | * | |
2055 | */ | |
2056 | ||
3558fd73 BB |
2057 | if (((idmask == (ATTR_UID|ATTR_GID)) && |
2058 | take_owner && take_group) || | |
2059 | ((idmask == ATTR_UID) && take_owner) || | |
2060 | ((idmask == ATTR_GID) && take_group)) { | |
34dc7c2f | 2061 | if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, |
2a068a13 | 2062 | skipaclchk, cr, mnt_ns) == 0) { |
34dc7c2f BB |
2063 | /* |
2064 | * Remove setuid/setgid for non-privileged users | |
2065 | */ | |
5484965a | 2066 | (void) secpolicy_setid_clear(vap, cr); |
3558fd73 | 2067 | trim_mask = (mask & (ATTR_UID|ATTR_GID)); |
34dc7c2f BB |
2068 | } else { |
2069 | need_policy = TRUE; | |
2070 | } | |
2071 | } else { | |
2072 | need_policy = TRUE; | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | mutex_enter(&zp->z_lock); | |
428870ff | 2077 | oldva.va_mode = zp->z_mode; |
572e2857 | 2078 | zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); |
5484965a BB |
2079 | if (mask & ATTR_XVATTR) { |
2080 | /* | |
2081 | * Update xvattr mask to include only those attributes | |
2082 | * that are actually changing. | |
2083 | * | |
2084 | * the bits will be restored prior to actually setting | |
2085 | * the attributes so the caller thinks they were set. | |
2086 | */ | |
2087 | if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { | |
2088 | if (xoap->xoa_appendonly != | |
2089 | ((zp->z_pflags & ZFS_APPENDONLY) != 0)) { | |
2090 | need_policy = TRUE; | |
2091 | } else { | |
2092 | XVA_CLR_REQ(xvap, XAT_APPENDONLY); | |
f4ea75d4 | 2093 | XVA_SET_REQ(tmpxvattr, XAT_APPENDONLY); |
5484965a BB |
2094 | } |
2095 | } | |
2096 | ||
9c5167d1 NF |
2097 | if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) { |
2098 | if (xoap->xoa_projinherit != | |
2099 | ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) { | |
2100 | need_policy = TRUE; | |
2101 | } else { | |
2102 | XVA_CLR_REQ(xvap, XAT_PROJINHERIT); | |
2103 | XVA_SET_REQ(tmpxvattr, XAT_PROJINHERIT); | |
2104 | } | |
2105 | } | |
2106 | ||
5484965a BB |
2107 | if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { |
2108 | if (xoap->xoa_nounlink != | |
2109 | ((zp->z_pflags & ZFS_NOUNLINK) != 0)) { | |
2110 | need_policy = TRUE; | |
2111 | } else { | |
2112 | XVA_CLR_REQ(xvap, XAT_NOUNLINK); | |
f4ea75d4 | 2113 | XVA_SET_REQ(tmpxvattr, XAT_NOUNLINK); |
5484965a BB |
2114 | } |
2115 | } | |
2116 | ||
2117 | if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { | |
2118 | if (xoap->xoa_immutable != | |
2119 | ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) { | |
2120 | need_policy = TRUE; | |
2121 | } else { | |
2122 | XVA_CLR_REQ(xvap, XAT_IMMUTABLE); | |
f4ea75d4 | 2123 | XVA_SET_REQ(tmpxvattr, XAT_IMMUTABLE); |
5484965a BB |
2124 | } |
2125 | } | |
2126 | ||
2127 | if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { | |
2128 | if (xoap->xoa_nodump != | |
2129 | ((zp->z_pflags & ZFS_NODUMP) != 0)) { | |
2130 | need_policy = TRUE; | |
2131 | } else { | |
2132 | XVA_CLR_REQ(xvap, XAT_NODUMP); | |
f4ea75d4 | 2133 | XVA_SET_REQ(tmpxvattr, XAT_NODUMP); |
5484965a BB |
2134 | } |
2135 | } | |
2136 | ||
2137 | if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { | |
2138 | if (xoap->xoa_av_modified != | |
2139 | ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) { | |
2140 | need_policy = TRUE; | |
2141 | } else { | |
2142 | XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); | |
f4ea75d4 | 2143 | XVA_SET_REQ(tmpxvattr, XAT_AV_MODIFIED); |
5484965a BB |
2144 | } |
2145 | } | |
2146 | ||
2147 | if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { | |
2148 | if ((!S_ISREG(ip->i_mode) && | |
2149 | xoap->xoa_av_quarantined) || | |
2150 | xoap->xoa_av_quarantined != | |
2151 | ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) { | |
2152 | need_policy = TRUE; | |
2153 | } else { | |
2154 | XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); | |
f4ea75d4 | 2155 | XVA_SET_REQ(tmpxvattr, XAT_AV_QUARANTINED); |
5484965a BB |
2156 | } |
2157 | } | |
2158 | ||
2159 | if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { | |
2160 | mutex_exit(&zp->z_lock); | |
ecb2b7dc | 2161 | err = SET_ERROR(EPERM); |
f4ea75d4 | 2162 | goto out3; |
5484965a BB |
2163 | } |
2164 | ||
2165 | if (need_policy == FALSE && | |
2166 | (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || | |
2167 | XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { | |
2168 | need_policy = TRUE; | |
2169 | } | |
2170 | } | |
34dc7c2f BB |
2171 | |
2172 | mutex_exit(&zp->z_lock); | |
2173 | ||
3558fd73 | 2174 | if (mask & ATTR_MODE) { |
2a068a13 YY |
2175 | if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr, |
2176 | mnt_ns) == 0) { | |
5484965a | 2177 | err = secpolicy_setid_setsticky_clear(ip, vap, |
f224eddf | 2178 | &oldva, cr, mnt_ns, zfs_i_user_ns(ip)); |
f4ea75d4 BB |
2179 | if (err) |
2180 | goto out3; | |
3558fd73 | 2181 | trim_mask |= ATTR_MODE; |
34dc7c2f BB |
2182 | } else { |
2183 | need_policy = TRUE; | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | if (need_policy) { | |
2188 | /* | |
2189 | * If trim_mask is set then take ownership | |
2190 | * has been granted or write_acl is present and user | |
2191 | * has the ability to modify mode. In that case remove | |
2192 | * UID|GID and or MODE from mask so that | |
2193 | * secpolicy_vnode_setattr() doesn't revoke it. | |
2194 | */ | |
2195 | ||
2196 | if (trim_mask) { | |
5484965a BB |
2197 | saved_mask = vap->va_mask; |
2198 | vap->va_mask &= ~trim_mask; | |
34dc7c2f | 2199 | } |
5484965a | 2200 | err = secpolicy_vnode_setattr(cr, ip, vap, &oldva, flags, |
b5459dd3 | 2201 | zfs_zaccess_unix, zp); |
f4ea75d4 BB |
2202 | if (err) |
2203 | goto out3; | |
34dc7c2f BB |
2204 | |
2205 | if (trim_mask) | |
5484965a | 2206 | vap->va_mask |= saved_mask; |
34dc7c2f BB |
2207 | } |
2208 | ||
2209 | /* | |
2210 | * secpolicy_vnode_setattr, or take ownership may have | |
2211 | * changed va_mask | |
2212 | */ | |
5484965a | 2213 | mask = vap->va_mask; |
34dc7c2f | 2214 | |
9c5167d1 NF |
2215 | if ((mask & (ATTR_UID | ATTR_GID)) || projid != ZFS_INVALID_PROJID) { |
2216 | handle_eadir = B_TRUE; | |
0037b49e | 2217 | err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), |
572e2857 | 2218 | &xattr_obj, sizeof (xattr_obj)); |
428870ff | 2219 | |
572e2857 | 2220 | if (err == 0 && xattr_obj) { |
3558fd73 | 2221 | err = zfs_zget(ZTOZSB(zp), xattr_obj, &attrzp); |
428870ff BB |
2222 | if (err) |
2223 | goto out2; | |
2224 | } | |
3558fd73 | 2225 | if (mask & ATTR_UID) { |
0037b49e | 2226 | new_kuid = zfs_fuid_create(zfsvfs, |
5484965a | 2227 | (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); |
64aefee1 | 2228 | if (new_kuid != KUID_TO_SUID(ZTOI(zp)->i_uid) && |
9c5167d1 NF |
2229 | zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT, |
2230 | new_kuid)) { | |
572e2857 | 2231 | if (attrzp) |
657ce253 | 2232 | zrele(attrzp); |
ecb2b7dc | 2233 | err = SET_ERROR(EDQUOT); |
428870ff BB |
2234 | goto out2; |
2235 | } | |
2236 | } | |
2237 | ||
3558fd73 | 2238 | if (mask & ATTR_GID) { |
0037b49e BB |
2239 | new_kgid = zfs_fuid_create(zfsvfs, |
2240 | (uint64_t)vap->va_gid, cr, ZFS_GROUP, &fuidp); | |
64aefee1 | 2241 | if (new_kgid != KGID_TO_SGID(ZTOI(zp)->i_gid) && |
9c5167d1 NF |
2242 | zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT, |
2243 | new_kgid)) { | |
572e2857 | 2244 | if (attrzp) |
657ce253 | 2245 | zrele(attrzp); |
ecb2b7dc | 2246 | err = SET_ERROR(EDQUOT); |
428870ff BB |
2247 | goto out2; |
2248 | } | |
2249 | } | |
9c5167d1 NF |
2250 | |
2251 | if (projid != ZFS_INVALID_PROJID && | |
2252 | zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) { | |
2253 | if (attrzp) | |
657ce253 | 2254 | zrele(attrzp); |
9c5167d1 NF |
2255 | err = EDQUOT; |
2256 | goto out2; | |
2257 | } | |
428870ff | 2258 | } |
9c5167d1 | 2259 | tx = dmu_tx_create(os); |
34dc7c2f | 2260 | |
3558fd73 | 2261 | if (mask & ATTR_MODE) { |
428870ff | 2262 | uint64_t pmode = zp->z_mode; |
572e2857 | 2263 | uint64_t acl_obj; |
5484965a | 2264 | new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); |
34dc7c2f | 2265 | |
7bf3e1fa PH |
2266 | if (ZTOZSB(zp)->z_acl_mode == ZFS_ACL_RESTRICTED && |
2267 | !(zp->z_pflags & ZFS_ACL_TRIVIAL)) { | |
2268 | err = EPERM; | |
2269 | goto out; | |
2270 | } | |
2271 | ||
156f74fc MM |
2272 | if ((err = zfs_acl_chmod_setattr(zp, &aclp, new_mode))) |
2273 | goto out; | |
428870ff | 2274 | |
572e2857 BB |
2275 | mutex_enter(&zp->z_lock); |
2276 | if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) { | |
428870ff BB |
2277 | /* |
2278 | * Are we upgrading ACL from old V0 format | |
2279 | * to V1 format? | |
2280 | */ | |
0037b49e | 2281 | if (zfsvfs->z_version >= ZPL_VERSION_FUID && |
572e2857 | 2282 | zfs_znode_acl_version(zp) == |
34dc7c2f | 2283 | ZFS_ACL_VERSION_INITIAL) { |
572e2857 | 2284 | dmu_tx_hold_free(tx, acl_obj, 0, |
34dc7c2f BB |
2285 | DMU_OBJECT_END); |
2286 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, | |
2287 | 0, aclp->z_acl_bytes); | |
2288 | } else { | |
572e2857 | 2289 | dmu_tx_hold_write(tx, acl_obj, 0, |
34dc7c2f BB |
2290 | aclp->z_acl_bytes); |
2291 | } | |
428870ff | 2292 | } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
34dc7c2f BB |
2293 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
2294 | 0, aclp->z_acl_bytes); | |
2295 | } | |
572e2857 | 2296 | mutex_exit(&zp->z_lock); |
428870ff BB |
2297 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); |
2298 | } else { | |
9c5167d1 NF |
2299 | if (((mask & ATTR_XVATTR) && |
2300 | XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) || | |
2301 | (projid != ZFS_INVALID_PROJID && | |
2302 | !(zp->z_pflags & ZFS_PROJID))) | |
5484965a BB |
2303 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); |
2304 | else | |
2305 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); | |
34dc7c2f BB |
2306 | } |
2307 | ||
428870ff BB |
2308 | if (attrzp) { |
2309 | dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE); | |
34dc7c2f BB |
2310 | } |
2311 | ||
0037b49e | 2312 | fuid_dirtied = zfsvfs->z_fuid_dirty; |
428870ff | 2313 | if (fuid_dirtied) |
0037b49e | 2314 | zfs_fuid_txhold(zfsvfs, tx); |
428870ff BB |
2315 | |
2316 | zfs_sa_upgrade_txholds(tx, zp); | |
2317 | ||
384f8a09 MA |
2318 | err = dmu_tx_assign(tx, TXG_WAIT); |
2319 | if (err) | |
9babb374 | 2320 | goto out; |
34dc7c2f | 2321 | |
428870ff | 2322 | count = 0; |
34dc7c2f BB |
2323 | /* |
2324 | * Set each attribute requested. | |
2325 | * We group settings according to the locks they need to acquire. | |
2326 | * | |
2327 | * Note: you cannot set ctime directly, although it will be | |
2328 | * updated as a side-effect of calling this function. | |
2329 | */ | |
2330 | ||
9c5167d1 NF |
2331 | if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) { |
2332 | /* | |
2333 | * For the existed object that is upgraded from old system, | |
2334 | * its on-disk layout has no slot for the project ID attribute. | |
2335 | * But quota accounting logic needs to access related slots by | |
2336 | * offset directly. So we need to adjust old objects' layout | |
2337 | * to make the project ID to some unified and fixed offset. | |
2338 | */ | |
2339 | if (attrzp) | |
2340 | err = sa_add_projid(attrzp->z_sa_hdl, tx, projid); | |
2341 | if (err == 0) | |
2342 | err = sa_add_projid(zp->z_sa_hdl, tx, projid); | |
2343 | ||
2344 | if (unlikely(err == EEXIST)) | |
2345 | err = 0; | |
2346 | else if (err != 0) | |
2347 | goto out; | |
2348 | else | |
2349 | projid = ZFS_INVALID_PROJID; | |
2350 | } | |
572e2857 | 2351 | |
3558fd73 | 2352 | if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE)) |
572e2857 | 2353 | mutex_enter(&zp->z_acl_lock); |
34dc7c2f BB |
2354 | mutex_enter(&zp->z_lock); |
2355 | ||
0037b49e | 2356 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, |
428870ff BB |
2357 | &zp->z_pflags, sizeof (zp->z_pflags)); |
2358 | ||
2359 | if (attrzp) { | |
3558fd73 | 2360 | if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE)) |
572e2857 | 2361 | mutex_enter(&attrzp->z_acl_lock); |
428870ff BB |
2362 | mutex_enter(&attrzp->z_lock); |
2363 | SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, | |
0037b49e | 2364 | SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags, |
428870ff | 2365 | sizeof (attrzp->z_pflags)); |
9c5167d1 NF |
2366 | if (projid != ZFS_INVALID_PROJID) { |
2367 | attrzp->z_projid = projid; | |
2368 | SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, | |
2369 | SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid, | |
2370 | sizeof (attrzp->z_projid)); | |
2371 | } | |
428870ff BB |
2372 | } |
2373 | ||
3558fd73 | 2374 | if (mask & (ATTR_UID|ATTR_GID)) { |
428870ff | 2375 | |
3558fd73 | 2376 | if (mask & ATTR_UID) { |
64aefee1 NB |
2377 | ZTOI(zp)->i_uid = SUID_TO_KUID(new_kuid); |
2378 | new_uid = zfs_uid_read(ZTOI(zp)); | |
0037b49e | 2379 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, |
428870ff | 2380 | &new_uid, sizeof (new_uid)); |
428870ff BB |
2381 | if (attrzp) { |
2382 | SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, | |
0037b49e | 2383 | SA_ZPL_UID(zfsvfs), NULL, &new_uid, |
428870ff | 2384 | sizeof (new_uid)); |
2c6abf15 | 2385 | ZTOI(attrzp)->i_uid = SUID_TO_KUID(new_uid); |
428870ff BB |
2386 | } |
2387 | } | |
2388 | ||
3558fd73 | 2389 | if (mask & ATTR_GID) { |
64aefee1 NB |
2390 | ZTOI(zp)->i_gid = SGID_TO_KGID(new_kgid); |
2391 | new_gid = zfs_gid_read(ZTOI(zp)); | |
0037b49e | 2392 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), |
428870ff | 2393 | NULL, &new_gid, sizeof (new_gid)); |
428870ff BB |
2394 | if (attrzp) { |
2395 | SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, | |
0037b49e | 2396 | SA_ZPL_GID(zfsvfs), NULL, &new_gid, |
428870ff | 2397 | sizeof (new_gid)); |
64aefee1 | 2398 | ZTOI(attrzp)->i_gid = SGID_TO_KGID(new_kgid); |
428870ff BB |
2399 | } |
2400 | } | |
3558fd73 | 2401 | if (!(mask & ATTR_MODE)) { |
0037b49e | 2402 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), |
428870ff BB |
2403 | NULL, &new_mode, sizeof (new_mode)); |
2404 | new_mode = zp->z_mode; | |
2405 | } | |
2406 | err = zfs_acl_chown_setattr(zp); | |
2407 | ASSERT(err == 0); | |
2408 | if (attrzp) { | |
2409 | err = zfs_acl_chown_setattr(attrzp); | |
2410 | ASSERT(err == 0); | |
2411 | } | |
2412 | } | |
2413 | ||
3558fd73 | 2414 | if (mask & ATTR_MODE) { |
0037b49e | 2415 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, |
428870ff | 2416 | &new_mode, sizeof (new_mode)); |
12fa7f34 | 2417 | zp->z_mode = ZTOI(zp)->i_mode = new_mode; |
99c564bc | 2418 | ASSERT3P(aclp, !=, NULL); |
9babb374 | 2419 | err = zfs_aclset_common(zp, aclp, cr, tx); |
c99c9001 | 2420 | ASSERT0(err); |
572e2857 BB |
2421 | if (zp->z_acl_cached) |
2422 | zfs_acl_free(zp->z_acl_cached); | |
45d1cae3 BB |
2423 | zp->z_acl_cached = aclp; |
2424 | aclp = NULL; | |
34dc7c2f BB |
2425 | } |
2426 | ||
704cd075 | 2427 | if ((mask & ATTR_ATIME) || zp->z_atime_dirty) { |
a43570c5 | 2428 | zp->z_atime_dirty = B_FALSE; |
704cd075 | 2429 | ZFS_TIME_ENCODE(&ip->i_atime, atime); |
0037b49e | 2430 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, |
0df9673f | 2431 | &atime, sizeof (atime)); |
34dc7c2f BB |
2432 | } |
2433 | ||
99834d19 | 2434 | if (mask & (ATTR_MTIME | ATTR_SIZE)) { |
5484965a | 2435 | ZFS_TIME_ENCODE(&vap->va_mtime, mtime); |
795699a6 BB |
2436 | ZTOI(zp)->i_mtime = zpl_inode_timestamp_truncate( |
2437 | vap->va_mtime, ZTOI(zp)); | |
87f9371a | 2438 | |
0037b49e | 2439 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, |
428870ff | 2440 | mtime, sizeof (mtime)); |
34dc7c2f BB |
2441 | } |
2442 | ||
99834d19 | 2443 | if (mask & (ATTR_CTIME | ATTR_SIZE)) { |
87f9371a | 2444 | ZFS_TIME_ENCODE(&vap->va_ctime, ctime); |
795699a6 BB |
2445 | ZTOI(zp)->i_ctime = zpl_inode_timestamp_truncate(vap->va_ctime, |
2446 | ZTOI(zp)); | |
0037b49e | 2447 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, |
87f9371a | 2448 | ctime, sizeof (ctime)); |
428870ff | 2449 | } |
87f9371a | 2450 | |
9c5167d1 NF |
2451 | if (projid != ZFS_INVALID_PROJID) { |
2452 | zp->z_projid = projid; | |
2453 | SA_ADD_BULK_ATTR(bulk, count, | |
2454 | SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid, | |
2455 | sizeof (zp->z_projid)); | |
2456 | } | |
2457 | ||
87f9371a NB |
2458 | if (attrzp && mask) { |
2459 | SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, | |
0037b49e | 2460 | SA_ZPL_CTIME(zfsvfs), NULL, &ctime, |
87f9371a NB |
2461 | sizeof (ctime)); |
2462 | } | |
2463 | ||
34dc7c2f BB |
2464 | /* |
2465 | * Do this after setting timestamps to prevent timestamp | |
2466 | * update from toggling bit | |
2467 | */ | |
2468 | ||
5484965a BB |
2469 | if (xoap && (mask & ATTR_XVATTR)) { |
2470 | ||
2471 | /* | |
2472 | * restore trimmed off masks | |
2473 | * so that return masks can be set for caller. | |
2474 | */ | |
2475 | ||
f4ea75d4 | 2476 | if (XVA_ISSET_REQ(tmpxvattr, XAT_APPENDONLY)) { |
5484965a BB |
2477 | XVA_SET_REQ(xvap, XAT_APPENDONLY); |
2478 | } | |
f4ea75d4 | 2479 | if (XVA_ISSET_REQ(tmpxvattr, XAT_NOUNLINK)) { |
5484965a BB |
2480 | XVA_SET_REQ(xvap, XAT_NOUNLINK); |
2481 | } | |
f4ea75d4 | 2482 | if (XVA_ISSET_REQ(tmpxvattr, XAT_IMMUTABLE)) { |
5484965a BB |
2483 | XVA_SET_REQ(xvap, XAT_IMMUTABLE); |
2484 | } | |
f4ea75d4 | 2485 | if (XVA_ISSET_REQ(tmpxvattr, XAT_NODUMP)) { |
5484965a BB |
2486 | XVA_SET_REQ(xvap, XAT_NODUMP); |
2487 | } | |
f4ea75d4 | 2488 | if (XVA_ISSET_REQ(tmpxvattr, XAT_AV_MODIFIED)) { |
5484965a BB |
2489 | XVA_SET_REQ(xvap, XAT_AV_MODIFIED); |
2490 | } | |
f4ea75d4 | 2491 | if (XVA_ISSET_REQ(tmpxvattr, XAT_AV_QUARANTINED)) { |
5484965a BB |
2492 | XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); |
2493 | } | |
9c5167d1 NF |
2494 | if (XVA_ISSET_REQ(tmpxvattr, XAT_PROJINHERIT)) { |
2495 | XVA_SET_REQ(xvap, XAT_PROJINHERIT); | |
2496 | } | |
5484965a BB |
2497 | |
2498 | if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) | |
2499 | ASSERT(S_ISREG(ip->i_mode)); | |
2500 | ||
2501 | zfs_xvattr_set(zp, xvap, tx); | |
2502 | } | |
2503 | ||
9babb374 | 2504 | if (fuid_dirtied) |
0037b49e | 2505 | zfs_fuid_sync(zfsvfs, tx); |
9babb374 | 2506 | |
34dc7c2f | 2507 | if (mask != 0) |
5484965a | 2508 | zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); |
34dc7c2f | 2509 | |
34dc7c2f | 2510 | mutex_exit(&zp->z_lock); |
3558fd73 | 2511 | if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE)) |
572e2857 | 2512 | mutex_exit(&zp->z_acl_lock); |
34dc7c2f | 2513 | |
572e2857 | 2514 | if (attrzp) { |
3558fd73 | 2515 | if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE)) |
572e2857 BB |
2516 | mutex_exit(&attrzp->z_acl_lock); |
2517 | mutex_exit(&attrzp->z_lock); | |
2518 | } | |
9babb374 | 2519 | out: |
9c5167d1 | 2520 | if (err == 0 && xattr_count > 0) { |
428870ff BB |
2521 | err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk, |
2522 | xattr_count, tx); | |
2523 | ASSERT(err2 == 0); | |
2524 | } | |
2525 | ||
45d1cae3 | 2526 | if (aclp) |
9babb374 | 2527 | zfs_acl_free(aclp); |
9babb374 BB |
2528 | |
2529 | if (fuidp) { | |
2530 | zfs_fuid_info_free(fuidp); | |
2531 | fuidp = NULL; | |
2532 | } | |
2533 | ||
428870ff | 2534 | if (err) { |
9babb374 | 2535 | dmu_tx_abort(tx); |
ea7e86d8 | 2536 | if (attrzp) |
657ce253 | 2537 | zrele(attrzp); |
428870ff BB |
2538 | if (err == ERESTART) |
2539 | goto top; | |
2540 | } else { | |
9c5167d1 NF |
2541 | if (count > 0) |
2542 | err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); | |
9babb374 | 2543 | dmu_tx_commit(tx); |
9c5167d1 NF |
2544 | if (attrzp) { |
2545 | if (err2 == 0 && handle_eadir) | |
2e7f664f | 2546 | err = zfs_setattr_dir(attrzp); |
657ce253 | 2547 | zrele(attrzp); |
9c5167d1 | 2548 | } |
fc273894 | 2549 | zfs_znode_update_vfs(zp); |
428870ff BB |
2550 | } |
2551 | ||
428870ff | 2552 | out2: |
9c5167d1 | 2553 | if (os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 2554 | zil_commit(zilog, 0); |
34dc7c2f | 2555 | |
f4ea75d4 | 2556 | out3: |
9c5167d1 NF |
2557 | kmem_free(xattr_bulk, sizeof (sa_bulk_attr_t) * bulks); |
2558 | kmem_free(bulk, sizeof (sa_bulk_attr_t) * bulks); | |
d1d7e268 | 2559 | kmem_free(tmpxvattr, sizeof (xvattr_t)); |
768eaced | 2560 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
2561 | return (err); |
2562 | } | |
2563 | ||
2564 | typedef struct zfs_zlock { | |
2565 | krwlock_t *zl_rwlock; /* lock we acquired */ | |
2566 | znode_t *zl_znode; /* znode we held */ | |
2567 | struct zfs_zlock *zl_next; /* next in list */ | |
2568 | } zfs_zlock_t; | |
2569 | ||
2570 | /* | |
2571 | * Drop locks and release vnodes that were held by zfs_rename_lock(). | |
2572 | */ | |
2573 | static void | |
2574 | zfs_rename_unlock(zfs_zlock_t **zlpp) | |
2575 | { | |
2576 | zfs_zlock_t *zl; | |
2577 | ||
2578 | while ((zl = *zlpp) != NULL) { | |
2579 | if (zl->zl_znode != NULL) | |
657ce253 | 2580 | zfs_zrele_async(zl->zl_znode); |
34dc7c2f BB |
2581 | rw_exit(zl->zl_rwlock); |
2582 | *zlpp = zl->zl_next; | |
2583 | kmem_free(zl, sizeof (*zl)); | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | /* | |
2588 | * Search back through the directory tree, using the ".." entries. | |
2589 | * Lock each directory in the chain to prevent concurrent renames. | |
2590 | * Fail any attempt to move a directory into one of its own descendants. | |
2591 | * XXX - z_parent_lock can overlap with map or grow locks | |
2592 | */ | |
2593 | static int | |
2594 | zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) | |
2595 | { | |
2596 | zfs_zlock_t *zl; | |
2597 | znode_t *zp = tdzp; | |
3558fd73 | 2598 | uint64_t rootid = ZTOZSB(zp)->z_root; |
428870ff | 2599 | uint64_t oidp = zp->z_id; |
34dc7c2f BB |
2600 | krwlock_t *rwlp = &szp->z_parent_lock; |
2601 | krw_t rw = RW_WRITER; | |
2602 | ||
2603 | /* | |
2604 | * First pass write-locks szp and compares to zp->z_id. | |
2605 | * Later passes read-lock zp and compare to zp->z_parent. | |
2606 | */ | |
2607 | do { | |
2608 | if (!rw_tryenter(rwlp, rw)) { | |
2609 | /* | |
2610 | * Another thread is renaming in this path. | |
2611 | * Note that if we are a WRITER, we don't have any | |
2612 | * parent_locks held yet. | |
2613 | */ | |
2614 | if (rw == RW_READER && zp->z_id > szp->z_id) { | |
2615 | /* | |
2616 | * Drop our locks and restart | |
2617 | */ | |
2618 | zfs_rename_unlock(&zl); | |
2619 | *zlpp = NULL; | |
2620 | zp = tdzp; | |
428870ff | 2621 | oidp = zp->z_id; |
34dc7c2f BB |
2622 | rwlp = &szp->z_parent_lock; |
2623 | rw = RW_WRITER; | |
2624 | continue; | |
2625 | } else { | |
2626 | /* | |
2627 | * Wait for other thread to drop its locks | |
2628 | */ | |
2629 | rw_enter(rwlp, rw); | |
2630 | } | |
2631 | } | |
2632 | ||
2633 | zl = kmem_alloc(sizeof (*zl), KM_SLEEP); | |
2634 | zl->zl_rwlock = rwlp; | |
2635 | zl->zl_znode = NULL; | |
2636 | zl->zl_next = *zlpp; | |
2637 | *zlpp = zl; | |
2638 | ||
428870ff | 2639 | if (oidp == szp->z_id) /* We're a descendant of szp */ |
2e528b49 | 2640 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2641 | |
428870ff | 2642 | if (oidp == rootid) /* We've hit the top */ |
34dc7c2f BB |
2643 | return (0); |
2644 | ||
2645 | if (rw == RW_READER) { /* i.e. not the first pass */ | |
3558fd73 | 2646 | int error = zfs_zget(ZTOZSB(zp), oidp, &zp); |
34dc7c2f BB |
2647 | if (error) |
2648 | return (error); | |
2649 | zl->zl_znode = zp; | |
2650 | } | |
3558fd73 | 2651 | (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(ZTOZSB(zp)), |
428870ff | 2652 | &oidp, sizeof (oidp)); |
34dc7c2f BB |
2653 | rwlp = &zp->z_parent_lock; |
2654 | rw = RW_READER; | |
2655 | ||
2656 | } while (zp->z_id != sdzp->z_id); | |
2657 | ||
2658 | return (0); | |
2659 | } | |
2660 | ||
2661 | /* | |
2662 | * Move an entry from the provided source directory to the target | |
2663 | * directory. Change the entry name as indicated. | |
2664 | * | |
657ce253 | 2665 | * IN: sdzp - Source directory containing the "old entry". |
34dc7c2f | 2666 | * snm - Old entry name. |
657ce253 | 2667 | * tdzp - Target directory to contain the "new entry". |
34dc7c2f BB |
2668 | * tnm - New entry name. |
2669 | * cr - credentials of caller. | |
34dc7c2f | 2670 | * flags - case flags |
dbf6108b AS |
2671 | * rflags - RENAME_* flags |
2672 | * wa_vap - attributes for RENAME_WHITEOUT (must be a char 0:0). | |
2a068a13 | 2673 | * mnt_ns - user namespace of the mount |
34dc7c2f | 2674 | * |
d3cc8b15 | 2675 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
2676 | * |
2677 | * Timestamps: | |
657ce253 | 2678 | * sdzp,tdzp - ctime|mtime updated |
34dc7c2f | 2679 | */ |
e5c39b95 | 2680 | int |
657ce253 | 2681 | zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp, char *tnm, |
d4dc53da | 2682 | cred_t *cr, int flags, uint64_t rflags, vattr_t *wo_vap, zidmap_t *mnt_ns) |
34dc7c2f | 2683 | { |
657ce253 MM |
2684 | znode_t *szp, *tzp; |
2685 | zfsvfs_t *zfsvfs = ZTOZSB(sdzp); | |
34dc7c2f | 2686 | zilog_t *zilog; |
34dc7c2f BB |
2687 | zfs_dirlock_t *sdl, *tdl; |
2688 | dmu_tx_t *tx; | |
2689 | zfs_zlock_t *zl; | |
2690 | int cmp, serr, terr; | |
2691 | int error = 0; | |
2692 | int zflg = 0; | |
e8b96c60 | 2693 | boolean_t waited = B_FALSE; |
dbf6108b AS |
2694 | /* Needed for whiteout inode creation. */ |
2695 | boolean_t fuid_dirtied; | |
2696 | zfs_acl_ids_t acl_ids; | |
2697 | boolean_t have_acl = B_FALSE; | |
2698 | znode_t *wzp = NULL; | |
2699 | ||
34dc7c2f | 2700 | |
32dec7bd | 2701 | if (snm == NULL || tnm == NULL) |
2702 | return (SET_ERROR(EINVAL)); | |
2703 | ||
dbf6108b AS |
2704 | if (rflags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
2705 | return (SET_ERROR(EINVAL)); | |
2706 | ||
2707 | /* Already checked by Linux VFS, but just to make sure. */ | |
2708 | if (rflags & RENAME_EXCHANGE && | |
2709 | (rflags & (RENAME_NOREPLACE | RENAME_WHITEOUT))) | |
2710 | return (SET_ERROR(EINVAL)); | |
2711 | ||
2712 | /* | |
2713 | * Make sure we only get wo_vap iff. RENAME_WHITEOUT and that it's the | |
2714 | * right kind of vattr_t for the whiteout file. These are set | |
2715 | * internally by ZFS so should never be incorrect. | |
2716 | */ | |
2717 | VERIFY_EQUIV(rflags & RENAME_WHITEOUT, wo_vap != NULL); | |
2718 | VERIFY_IMPLY(wo_vap, wo_vap->va_mode == S_IFCHR); | |
2719 | VERIFY_IMPLY(wo_vap, wo_vap->va_rdev == makedevice(0, 0)); | |
2720 | ||
768eaced CC |
2721 | if ((error = zfs_enter_verify_zp(zfsvfs, sdzp, FTAG)) != 0) |
2722 | return (error); | |
0037b49e | 2723 | zilog = zfsvfs->z_log; |
34dc7c2f | 2724 | |
768eaced CC |
2725 | if ((error = zfs_verify_zp(tdzp)) != 0) { |
2726 | zfs_exit(zfsvfs, FTAG); | |
2727 | return (error); | |
2728 | } | |
812e91a7 MT |
2729 | |
2730 | /* | |
2731 | * We check i_sb because snapshots and the ctldir must have different | |
2732 | * super blocks. | |
2733 | */ | |
657ce253 MM |
2734 | if (ZTOI(tdzp)->i_sb != ZTOI(sdzp)->i_sb || |
2735 | zfsctl_is_node(ZTOI(tdzp))) { | |
768eaced | 2736 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 2737 | return (SET_ERROR(EXDEV)); |
34dc7c2f BB |
2738 | } |
2739 | ||
0037b49e | 2740 | if (zfsvfs->z_utf8 && u8_validate(tnm, |
34dc7c2f | 2741 | strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
768eaced | 2742 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 2743 | return (SET_ERROR(EILSEQ)); |
34dc7c2f BB |
2744 | } |
2745 | ||
2746 | if (flags & FIGNORECASE) | |
2747 | zflg |= ZCILOOK; | |
2748 | ||
2749 | top: | |
2750 | szp = NULL; | |
2751 | tzp = NULL; | |
2752 | zl = NULL; | |
2753 | ||
2754 | /* | |
2755 | * This is to prevent the creation of links into attribute space | |
2756 | * by renaming a linked file into/outof an attribute directory. | |
2757 | * See the comment in zfs_link() for why this is considered bad. | |
2758 | */ | |
428870ff | 2759 | if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) { |
768eaced | 2760 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 2761 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
2762 | } |
2763 | ||
2764 | /* | |
2765 | * Lock source and target directory entries. To prevent deadlock, | |
2766 | * a lock ordering must be defined. We lock the directory with | |
2767 | * the smallest object id first, or if it's a tie, the one with | |
2768 | * the lexically first name. | |
2769 | */ | |
2770 | if (sdzp->z_id < tdzp->z_id) { | |
2771 | cmp = -1; | |
2772 | } else if (sdzp->z_id > tdzp->z_id) { | |
2773 | cmp = 1; | |
2774 | } else { | |
2775 | /* | |
2776 | * First compare the two name arguments without | |
2777 | * considering any case folding. | |
2778 | */ | |
0037b49e | 2779 | int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); |
34dc7c2f BB |
2780 | |
2781 | cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); | |
0037b49e | 2782 | ASSERT(error == 0 || !zfsvfs->z_utf8); |
34dc7c2f BB |
2783 | if (cmp == 0) { |
2784 | /* | |
2785 | * POSIX: "If the old argument and the new argument | |
2786 | * both refer to links to the same existing file, | |
2787 | * the rename() function shall return successfully | |
2788 | * and perform no other action." | |
2789 | */ | |
768eaced | 2790 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
2791 | return (0); |
2792 | } | |
2793 | /* | |
2794 | * If the file system is case-folding, then we may | |
2795 | * have some more checking to do. A case-folding file | |
2796 | * system is either supporting mixed case sensitivity | |
2797 | * access or is completely case-insensitive. Note | |
2798 | * that the file system is always case preserving. | |
2799 | * | |
2800 | * In mixed sensitivity mode case sensitive behavior | |
2801 | * is the default. FIGNORECASE must be used to | |
2802 | * explicitly request case insensitive behavior. | |
2803 | * | |
2804 | * If the source and target names provided differ only | |
2805 | * by case (e.g., a request to rename 'tim' to 'Tim'), | |
2806 | * we will treat this as a special case in the | |
2807 | * case-insensitive mode: as long as the source name | |
2808 | * is an exact match, we will allow this to proceed as | |
2809 | * a name-change request. | |
2810 | */ | |
0037b49e BB |
2811 | if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || |
2812 | (zfsvfs->z_case == ZFS_CASE_MIXED && | |
34dc7c2f | 2813 | flags & FIGNORECASE)) && |
0037b49e | 2814 | u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, |
34dc7c2f BB |
2815 | &error) == 0) { |
2816 | /* | |
2817 | * case preserving rename request, require exact | |
2818 | * name matches | |
2819 | */ | |
2820 | zflg |= ZCIEXACT; | |
2821 | zflg &= ~ZCILOOK; | |
2822 | } | |
2823 | } | |
2824 | ||
428870ff BB |
2825 | /* |
2826 | * If the source and destination directories are the same, we should | |
2827 | * grab the z_name_lock of that directory only once. | |
2828 | */ | |
2829 | if (sdzp == tdzp) { | |
2830 | zflg |= ZHAVELOCK; | |
2831 | rw_enter(&sdzp->z_name_lock, RW_READER); | |
2832 | } | |
2833 | ||
34dc7c2f BB |
2834 | if (cmp < 0) { |
2835 | serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, | |
2836 | ZEXISTS | zflg, NULL, NULL); | |
2837 | terr = zfs_dirent_lock(&tdl, | |
2838 | tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); | |
2839 | } else { | |
2840 | terr = zfs_dirent_lock(&tdl, | |
2841 | tdzp, tnm, &tzp, zflg, NULL, NULL); | |
2842 | serr = zfs_dirent_lock(&sdl, | |
2843 | sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, | |
2844 | NULL, NULL); | |
2845 | } | |
2846 | ||
2847 | if (serr) { | |
2848 | /* | |
2849 | * Source entry invalid or not there. | |
2850 | */ | |
2851 | if (!terr) { | |
2852 | zfs_dirent_unlock(tdl); | |
2853 | if (tzp) | |
657ce253 | 2854 | zrele(tzp); |
34dc7c2f | 2855 | } |
428870ff BB |
2856 | |
2857 | if (sdzp == tdzp) | |
2858 | rw_exit(&sdzp->z_name_lock); | |
2859 | ||
34dc7c2f BB |
2860 | if (strcmp(snm, "..") == 0) |
2861 | serr = EINVAL; | |
768eaced | 2862 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
2863 | return (serr); |
2864 | } | |
2865 | if (terr) { | |
2866 | zfs_dirent_unlock(sdl); | |
657ce253 | 2867 | zrele(szp); |
428870ff BB |
2868 | |
2869 | if (sdzp == tdzp) | |
2870 | rw_exit(&sdzp->z_name_lock); | |
2871 | ||
34dc7c2f BB |
2872 | if (strcmp(tnm, "..") == 0) |
2873 | terr = EINVAL; | |
768eaced | 2874 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
2875 | return (terr); |
2876 | } | |
2877 | ||
9c5167d1 NF |
2878 | /* |
2879 | * If we are using project inheritance, means if the directory has | |
2880 | * ZFS_PROJINHERIT set, then its descendant directories will inherit | |
2881 | * not only the project ID, but also the ZFS_PROJINHERIT flag. Under | |
2882 | * such case, we only allow renames into our tree when the project | |
2883 | * IDs are the same. | |
2884 | */ | |
2885 | if (tdzp->z_pflags & ZFS_PROJINHERIT && | |
2886 | tdzp->z_projid != szp->z_projid) { | |
2887 | error = SET_ERROR(EXDEV); | |
2888 | goto out; | |
2889 | } | |
2890 | ||
34dc7c2f BB |
2891 | /* |
2892 | * Must have write access at the source to remove the old entry | |
2893 | * and write access at the target to create the new entry. | |
2894 | * Note that if target and source are the same, this can be | |
2895 | * done in a single check. | |
2896 | */ | |
2a068a13 | 2897 | if ((error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr, mnt_ns))) |
34dc7c2f BB |
2898 | goto out; |
2899 | ||
3558fd73 | 2900 | if (S_ISDIR(ZTOI(szp)->i_mode)) { |
34dc7c2f BB |
2901 | /* |
2902 | * Check to make sure rename is valid. | |
2903 | * Can't do a move like this: /usr/a/b to /usr/a/b/c/d | |
2904 | */ | |
149e873a | 2905 | if ((error = zfs_rename_lock(szp, tdzp, sdzp, &zl))) |
34dc7c2f BB |
2906 | goto out; |
2907 | } | |
2908 | ||
2909 | /* | |
2910 | * Does target exist? | |
2911 | */ | |
2912 | if (tzp) { | |
dbf6108b AS |
2913 | if (rflags & RENAME_NOREPLACE) { |
2914 | error = SET_ERROR(EEXIST); | |
2915 | goto out; | |
2916 | } | |
34dc7c2f | 2917 | /* |
dbf6108b | 2918 | * Source and target must be the same type (unless exchanging). |
34dc7c2f | 2919 | */ |
dbf6108b AS |
2920 | if (!(rflags & RENAME_EXCHANGE)) { |
2921 | boolean_t s_is_dir = S_ISDIR(ZTOI(szp)->i_mode) != 0; | |
2922 | boolean_t t_is_dir = S_ISDIR(ZTOI(tzp)->i_mode) != 0; | |
e015d6cc | 2923 | |
dbf6108b AS |
2924 | if (s_is_dir != t_is_dir) { |
2925 | error = SET_ERROR(s_is_dir ? ENOTDIR : EISDIR); | |
2926 | goto out; | |
2927 | } | |
34dc7c2f BB |
2928 | } |
2929 | /* | |
2930 | * POSIX dictates that when the source and target | |
2931 | * entries refer to the same file object, rename | |
2932 | * must do nothing and exit without error. | |
2933 | */ | |
2934 | if (szp->z_id == tzp->z_id) { | |
2935 | error = 0; | |
2936 | goto out; | |
2937 | } | |
dbf6108b AS |
2938 | } else if (rflags & RENAME_EXCHANGE) { |
2939 | /* Target must exist for RENAME_EXCHANGE. */ | |
2940 | error = SET_ERROR(ENOENT); | |
2941 | goto out; | |
2942 | } | |
2943 | ||
2944 | /* Set up inode creation for RENAME_WHITEOUT. */ | |
2945 | if (rflags & RENAME_WHITEOUT) { | |
2946 | /* | |
2947 | * Whiteout files are not regular files or directories, so to | |
2948 | * match zfs_create() we do not inherit the project id. | |
2949 | */ | |
2950 | uint64_t wo_projid = ZFS_DEFAULT_PROJID; | |
2951 | ||
2952 | error = zfs_zaccess(sdzp, ACE_ADD_FILE, 0, B_FALSE, cr, mnt_ns); | |
2953 | if (error) | |
2954 | goto out; | |
2955 | ||
2956 | if (!have_acl) { | |
2957 | error = zfs_acl_ids_create(sdzp, 0, wo_vap, cr, NULL, | |
2958 | &acl_ids, mnt_ns); | |
2959 | if (error) | |
2960 | goto out; | |
2961 | have_acl = B_TRUE; | |
2962 | } | |
2963 | ||
2964 | if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, wo_projid)) { | |
2965 | error = SET_ERROR(EDQUOT); | |
2966 | goto out; | |
2967 | } | |
34dc7c2f BB |
2968 | } |
2969 | ||
0037b49e | 2970 | tx = dmu_tx_create(zfsvfs->z_os); |
428870ff BB |
2971 | dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); |
2972 | dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE); | |
dbf6108b AS |
2973 | dmu_tx_hold_zap(tx, sdzp->z_id, |
2974 | (rflags & RENAME_EXCHANGE) ? TRUE : FALSE, snm); | |
34dc7c2f | 2975 | dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); |
428870ff BB |
2976 | if (sdzp != tdzp) { |
2977 | dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE); | |
2978 | zfs_sa_upgrade_txholds(tx, tdzp); | |
2979 | } | |
2980 | if (tzp) { | |
2981 | dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE); | |
2982 | zfs_sa_upgrade_txholds(tx, tzp); | |
2983 | } | |
dbf6108b AS |
2984 | if (rflags & RENAME_WHITEOUT) { |
2985 | dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + | |
2986 | ZFS_SA_BASE_ATTR_SIZE); | |
428870ff | 2987 | |
dbf6108b AS |
2988 | dmu_tx_hold_zap(tx, sdzp->z_id, TRUE, snm); |
2989 | dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE); | |
2990 | if (!zfsvfs->z_use_sa && | |
2991 | acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { | |
2992 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, | |
2993 | 0, acl_ids.z_aclp->z_acl_bytes); | |
2994 | } | |
2995 | } | |
2996 | fuid_dirtied = zfsvfs->z_fuid_dirty; | |
2997 | if (fuid_dirtied) | |
2998 | zfs_fuid_txhold(zfsvfs, tx); | |
428870ff | 2999 | zfs_sa_upgrade_txholds(tx, szp); |
0037b49e | 3000 | dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
0735ecb3 | 3001 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
3002 | if (error) { |
3003 | if (zl != NULL) | |
3004 | zfs_rename_unlock(&zl); | |
3005 | zfs_dirent_unlock(sdl); | |
3006 | zfs_dirent_unlock(tdl); | |
428870ff BB |
3007 | |
3008 | if (sdzp == tdzp) | |
3009 | rw_exit(&sdzp->z_name_lock); | |
3010 | ||
fb5f0bc8 | 3011 | if (error == ERESTART) { |
e8b96c60 | 3012 | waited = B_TRUE; |
34dc7c2f BB |
3013 | dmu_tx_wait(tx); |
3014 | dmu_tx_abort(tx); | |
657ce253 | 3015 | zrele(szp); |
ea7e86d8 | 3016 | if (tzp) |
657ce253 | 3017 | zrele(tzp); |
34dc7c2f BB |
3018 | goto top; |
3019 | } | |
3020 | dmu_tx_abort(tx); | |
657ce253 | 3021 | zrele(szp); |
ea7e86d8 | 3022 | if (tzp) |
657ce253 | 3023 | zrele(tzp); |
768eaced | 3024 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3025 | return (error); |
3026 | } | |
3027 | ||
e015d6cc AS |
3028 | /* |
3029 | * Unlink the source. | |
3030 | */ | |
3031 | szp->z_pflags |= ZFS_AV_MODIFIED; | |
3032 | if (tdzp->z_pflags & ZFS_PROJINHERIT) | |
3033 | szp->z_pflags |= ZFS_PROJINHERIT; | |
34dc7c2f | 3034 | |
e015d6cc AS |
3035 | error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), |
3036 | (void *)&szp->z_pflags, sizeof (uint64_t), tx); | |
dbf6108b | 3037 | VERIFY0(error); |
34dc7c2f | 3038 | |
e015d6cc AS |
3039 | error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); |
3040 | if (error) | |
3041 | goto commit; | |
3042 | ||
3043 | /* | |
3044 | * Unlink the target. | |
3045 | */ | |
3046 | if (tzp) { | |
dbf6108b AS |
3047 | int tzflg = zflg; |
3048 | ||
3049 | if (rflags & RENAME_EXCHANGE) { | |
3050 | /* This inode will be re-linked soon. */ | |
3051 | tzflg |= ZRENAMING; | |
3052 | ||
3053 | tzp->z_pflags |= ZFS_AV_MODIFIED; | |
3054 | if (sdzp->z_pflags & ZFS_PROJINHERIT) | |
3055 | tzp->z_pflags |= ZFS_PROJINHERIT; | |
3056 | ||
3057 | error = sa_update(tzp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), | |
3058 | (void *)&tzp->z_pflags, sizeof (uint64_t), tx); | |
3059 | ASSERT0(error); | |
3060 | } | |
3061 | error = zfs_link_destroy(tdl, tzp, tx, tzflg, NULL); | |
e015d6cc AS |
3062 | if (error) |
3063 | goto commit_link_szp; | |
3064 | } | |
3065 | ||
3066 | /* | |
dbf6108b AS |
3067 | * Create the new target links: |
3068 | * * We always link the target. | |
3069 | * * RENAME_EXCHANGE: Link the old target to the source. | |
3070 | * * RENAME_WHITEOUT: Create a whiteout inode in-place of the source. | |
e015d6cc AS |
3071 | */ |
3072 | error = zfs_link_create(tdl, szp, tx, ZRENAMING); | |
3073 | if (error) { | |
3074 | /* | |
3075 | * If we have removed the existing target, a subsequent call to | |
3076 | * zfs_link_create() to add back the same entry, but with a new | |
3077 | * dnode (szp), should not fail. | |
3078 | */ | |
3079 | ASSERT3P(tzp, ==, NULL); | |
3080 | goto commit_link_tzp; | |
34dc7c2f BB |
3081 | } |
3082 | ||
dbf6108b AS |
3083 | switch (rflags & (RENAME_EXCHANGE | RENAME_WHITEOUT)) { |
3084 | case RENAME_EXCHANGE: | |
3085 | error = zfs_link_create(sdl, tzp, tx, ZRENAMING); | |
3086 | /* | |
3087 | * The same argument as zfs_link_create() failing for | |
3088 | * szp applies here, since the source directory must | |
3089 | * have had an entry we are replacing. | |
3090 | */ | |
3091 | ASSERT0(error); | |
3092 | if (error) | |
3093 | goto commit_unlink_td_szp; | |
3094 | break; | |
3095 | case RENAME_WHITEOUT: | |
3096 | zfs_mknode(sdzp, wo_vap, tx, cr, 0, &wzp, &acl_ids); | |
3097 | error = zfs_link_create(sdl, wzp, tx, ZNEW); | |
3098 | if (error) { | |
3099 | zfs_znode_delete(wzp, tx); | |
3100 | remove_inode_hash(ZTOI(wzp)); | |
3101 | goto commit_unlink_td_szp; | |
3102 | } | |
3103 | break; | |
3104 | } | |
3105 | ||
3106 | if (fuid_dirtied) | |
3107 | zfs_fuid_sync(zfsvfs, tx); | |
3108 | ||
3109 | switch (rflags & (RENAME_EXCHANGE | RENAME_WHITEOUT)) { | |
3110 | case RENAME_EXCHANGE: | |
3111 | zfs_log_rename_exchange(zilog, tx, | |
3112 | (flags & FIGNORECASE ? TX_CI : 0), sdzp, sdl->dl_name, | |
3113 | tdzp, tdl->dl_name, szp); | |
3114 | break; | |
3115 | case RENAME_WHITEOUT: | |
3116 | zfs_log_rename_whiteout(zilog, tx, | |
3117 | (flags & FIGNORECASE ? TX_CI : 0), sdzp, sdl->dl_name, | |
3118 | tdzp, tdl->dl_name, szp, wzp); | |
3119 | break; | |
3120 | default: | |
3121 | ASSERT0(rflags & ~RENAME_NOREPLACE); | |
3122 | zfs_log_rename(zilog, tx, (flags & FIGNORECASE ? TX_CI : 0), | |
3123 | sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); | |
3124 | break; | |
3125 | } | |
e015d6cc AS |
3126 | |
3127 | commit: | |
34dc7c2f BB |
3128 | dmu_tx_commit(tx); |
3129 | out: | |
dbf6108b AS |
3130 | if (have_acl) |
3131 | zfs_acl_ids_free(&acl_ids); | |
34dc7c2f | 3132 | |
fc273894 | 3133 | zfs_znode_update_vfs(sdzp); |
428870ff BB |
3134 | if (sdzp == tdzp) |
3135 | rw_exit(&sdzp->z_name_lock); | |
3136 | ||
960e08fe | 3137 | if (sdzp != tdzp) |
fc273894 | 3138 | zfs_znode_update_vfs(tdzp); |
428870ff | 3139 | |
fc273894 | 3140 | zfs_znode_update_vfs(szp); |
657ce253 | 3141 | zrele(szp); |
dbf6108b AS |
3142 | if (wzp) { |
3143 | zfs_znode_update_vfs(wzp); | |
3144 | zrele(wzp); | |
3145 | } | |
960e08fe | 3146 | if (tzp) { |
fc273894 | 3147 | zfs_znode_update_vfs(tzp); |
657ce253 | 3148 | zrele(tzp); |
960e08fe | 3149 | } |
34dc7c2f | 3150 | |
dbf6108b AS |
3151 | if (zl != NULL) |
3152 | zfs_rename_unlock(&zl); | |
3153 | ||
3154 | zfs_dirent_unlock(sdl); | |
3155 | zfs_dirent_unlock(tdl); | |
3156 | ||
0037b49e | 3157 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 3158 | zil_commit(zilog, 0); |
428870ff | 3159 | |
768eaced | 3160 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f | 3161 | return (error); |
e015d6cc AS |
3162 | |
3163 | /* | |
3164 | * Clean-up path for broken link state. | |
3165 | * | |
3166 | * At this point we are in a (very) bad state, so we need to do our | |
dbf6108b AS |
3167 | * best to correct the state. In particular, all of the nlinks are |
3168 | * wrong because we were destroying and creating links with ZRENAMING. | |
3169 | * | |
3170 | * In some form, all of these operations have to resolve the state: | |
3171 | * | |
3172 | * * link_destroy() *must* succeed. Fortunately, this is very likely | |
3173 | * since we only just created it. | |
e015d6cc | 3174 | * |
dbf6108b AS |
3175 | * * link_create()s are allowed to fail (though they shouldn't because |
3176 | * we only just unlinked them and are putting the entries back | |
3177 | * during clean-up). But if they fail, we can just forcefully drop | |
3178 | * the nlink value to (at the very least) avoid broken nlink values | |
3179 | * -- though in the case of non-empty directories we will have to | |
3180 | * panic (otherwise we'd have a leaked directory with a broken ..). | |
e015d6cc | 3181 | */ |
dbf6108b AS |
3182 | commit_unlink_td_szp: |
3183 | VERIFY0(zfs_link_destroy(tdl, szp, tx, ZRENAMING, NULL)); | |
e015d6cc AS |
3184 | commit_link_tzp: |
3185 | if (tzp) { | |
3186 | if (zfs_link_create(tdl, tzp, tx, ZRENAMING)) | |
dbf6108b | 3187 | VERIFY0(zfs_drop_nlink(tzp, tx, NULL)); |
e015d6cc AS |
3188 | } |
3189 | commit_link_szp: | |
3190 | if (zfs_link_create(sdl, szp, tx, ZRENAMING)) | |
dbf6108b | 3191 | VERIFY0(zfs_drop_nlink(szp, tx, NULL)); |
e015d6cc | 3192 | goto commit; |
34dc7c2f BB |
3193 | } |
3194 | ||
3195 | /* | |
3196 | * Insert the indicated symbolic reference entry into the directory. | |
3197 | * | |
657ce253 | 3198 | * IN: dzp - Directory to contain new symbolic link. |
841a7a98 | 3199 | * name - Name of directory entry in dip. |
34dc7c2f | 3200 | * vap - Attributes of new entry. |
841a7a98 | 3201 | * link - Name for new symlink entry. |
34dc7c2f | 3202 | * cr - credentials of caller. |
34dc7c2f | 3203 | * flags - case flags |
2a068a13 | 3204 | * mnt_ns - user namespace of the mount |
34dc7c2f | 3205 | * |
657ce253 | 3206 | * OUT: zpp - Znode for new symbolic link. |
841a7a98 | 3207 | * |
d3cc8b15 | 3208 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
3209 | * |
3210 | * Timestamps: | |
3558fd73 | 3211 | * dip - ctime|mtime updated |
34dc7c2f | 3212 | */ |
e5c39b95 | 3213 | int |
657ce253 | 3214 | zfs_symlink(znode_t *dzp, char *name, vattr_t *vap, char *link, |
d4dc53da | 3215 | znode_t **zpp, cred_t *cr, int flags, zidmap_t *mnt_ns) |
34dc7c2f | 3216 | { |
657ce253 | 3217 | znode_t *zp; |
34dc7c2f BB |
3218 | zfs_dirlock_t *dl; |
3219 | dmu_tx_t *tx; | |
657ce253 | 3220 | zfsvfs_t *zfsvfs = ZTOZSB(dzp); |
34dc7c2f | 3221 | zilog_t *zilog; |
428870ff | 3222 | uint64_t len = strlen(link); |
34dc7c2f BB |
3223 | int error; |
3224 | int zflg = ZNEW; | |
9babb374 BB |
3225 | zfs_acl_ids_t acl_ids; |
3226 | boolean_t fuid_dirtied; | |
428870ff | 3227 | uint64_t txtype = TX_SYMLINK; |
e8b96c60 | 3228 | boolean_t waited = B_FALSE; |
34dc7c2f | 3229 | |
3558fd73 | 3230 | ASSERT(S_ISLNK(vap->va_mode)); |
34dc7c2f | 3231 | |
32dec7bd | 3232 | if (name == NULL) |
3233 | return (SET_ERROR(EINVAL)); | |
3234 | ||
768eaced CC |
3235 | if ((error = zfs_enter_verify_zp(zfsvfs, dzp, FTAG)) != 0) |
3236 | return (error); | |
0037b49e | 3237 | zilog = zfsvfs->z_log; |
34dc7c2f | 3238 | |
0037b49e | 3239 | if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), |
34dc7c2f | 3240 | NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
768eaced | 3241 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3242 | return (SET_ERROR(EILSEQ)); |
34dc7c2f BB |
3243 | } |
3244 | if (flags & FIGNORECASE) | |
3245 | zflg |= ZCILOOK; | |
34dc7c2f BB |
3246 | |
3247 | if (len > MAXPATHLEN) { | |
768eaced | 3248 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3249 | return (SET_ERROR(ENAMETOOLONG)); |
34dc7c2f BB |
3250 | } |
3251 | ||
428870ff | 3252 | if ((error = zfs_acl_ids_create(dzp, 0, |
2a068a13 | 3253 | vap, cr, NULL, &acl_ids, mnt_ns)) != 0) { |
768eaced | 3254 | zfs_exit(zfsvfs, FTAG); |
428870ff BB |
3255 | return (error); |
3256 | } | |
3257 | top: | |
657ce253 | 3258 | *zpp = NULL; |
3558fd73 | 3259 | |
34dc7c2f BB |
3260 | /* |
3261 | * Attempt to lock directory; fail if entry already exists. | |
3262 | */ | |
3263 | error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); | |
3264 | if (error) { | |
428870ff | 3265 | zfs_acl_ids_free(&acl_ids); |
768eaced | 3266 | zfs_exit(zfsvfs, FTAG); |
428870ff BB |
3267 | return (error); |
3268 | } | |
3269 | ||
2a068a13 | 3270 | if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr, mnt_ns))) { |
428870ff BB |
3271 | zfs_acl_ids_free(&acl_ids); |
3272 | zfs_dirent_unlock(dl); | |
768eaced | 3273 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3274 | return (error); |
3275 | } | |
3276 | ||
9c5167d1 | 3277 | if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, ZFS_DEFAULT_PROJID)) { |
9babb374 BB |
3278 | zfs_acl_ids_free(&acl_ids); |
3279 | zfs_dirent_unlock(dl); | |
768eaced | 3280 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3281 | return (SET_ERROR(EDQUOT)); |
9babb374 | 3282 | } |
0037b49e BB |
3283 | tx = dmu_tx_create(zfsvfs->z_os); |
3284 | fuid_dirtied = zfsvfs->z_fuid_dirty; | |
34dc7c2f | 3285 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); |
34dc7c2f | 3286 | dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
428870ff BB |
3287 | dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + |
3288 | ZFS_SA_BASE_ATTR_SIZE + len); | |
3289 | dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); | |
0037b49e | 3290 | if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
428870ff BB |
3291 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, |
3292 | acl_ids.z_aclp->z_acl_bytes); | |
3293 | } | |
9babb374 | 3294 | if (fuid_dirtied) |
0037b49e | 3295 | zfs_fuid_txhold(zfsvfs, tx); |
0735ecb3 | 3296 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
3297 | if (error) { |
3298 | zfs_dirent_unlock(dl); | |
fb5f0bc8 | 3299 | if (error == ERESTART) { |
e8b96c60 | 3300 | waited = B_TRUE; |
34dc7c2f BB |
3301 | dmu_tx_wait(tx); |
3302 | dmu_tx_abort(tx); | |
3303 | goto top; | |
3304 | } | |
428870ff | 3305 | zfs_acl_ids_free(&acl_ids); |
34dc7c2f | 3306 | dmu_tx_abort(tx); |
768eaced | 3307 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3308 | return (error); |
3309 | } | |
3310 | ||
34dc7c2f BB |
3311 | /* |
3312 | * Create a new object for the symlink. | |
bf169e9f | 3313 | * for version 4 ZPL datasets the symlink will be an SA attribute |
34dc7c2f | 3314 | */ |
428870ff | 3315 | zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); |
9babb374 | 3316 | |
428870ff | 3317 | if (fuid_dirtied) |
0037b49e | 3318 | zfs_fuid_sync(zfsvfs, tx); |
34dc7c2f | 3319 | |
572e2857 | 3320 | mutex_enter(&zp->z_lock); |
428870ff | 3321 | if (zp->z_is_sa) |
0037b49e | 3322 | error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs), |
428870ff BB |
3323 | link, len, tx); |
3324 | else | |
3325 | zfs_sa_symlink(zp, link, len, tx); | |
572e2857 | 3326 | mutex_exit(&zp->z_lock); |
34dc7c2f | 3327 | |
428870ff | 3328 | zp->z_size = len; |
0037b49e | 3329 | (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), |
428870ff | 3330 | &zp->z_size, sizeof (zp->z_size), tx); |
34dc7c2f BB |
3331 | /* |
3332 | * Insert the new object into the directory. | |
3333 | */ | |
599b8648 CC |
3334 | error = zfs_link_create(dl, zp, tx, ZNEW); |
3335 | if (error != 0) { | |
3336 | zfs_znode_delete(zp, tx); | |
3337 | remove_inode_hash(ZTOI(zp)); | |
3338 | } else { | |
3339 | if (flags & FIGNORECASE) | |
3340 | txtype |= TX_CI; | |
3341 | zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); | |
4f301661 | 3342 | |
fc273894 KHN |
3343 | zfs_znode_update_vfs(dzp); |
3344 | zfs_znode_update_vfs(zp); | |
599b8648 | 3345 | } |
960e08fe | 3346 | |
9babb374 | 3347 | zfs_acl_ids_free(&acl_ids); |
34dc7c2f BB |
3348 | |
3349 | dmu_tx_commit(tx); | |
3350 | ||
3351 | zfs_dirent_unlock(dl); | |
3352 | ||
599b8648 | 3353 | if (error == 0) { |
657ce253 | 3354 | *zpp = zp; |
34dc7c2f | 3355 | |
599b8648 CC |
3356 | if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
3357 | zil_commit(zilog, 0); | |
3358 | } else { | |
657ce253 | 3359 | zrele(zp); |
599b8648 | 3360 | } |
428870ff | 3361 | |
768eaced | 3362 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3363 | return (error); |
3364 | } | |
3365 | ||
3366 | /* | |
3367 | * Return, in the buffer contained in the provided uio structure, | |
3558fd73 | 3368 | * the symbolic path referred to by ip. |
34dc7c2f | 3369 | * |
8b4f9a2d BB |
3370 | * IN: ip - inode of symbolic link |
3371 | * uio - structure to contain the link path. | |
3372 | * cr - credentials of caller. | |
34dc7c2f BB |
3373 | * |
3374 | * RETURN: 0 if success | |
3375 | * error code if failure | |
3376 | * | |
3377 | * Timestamps: | |
3558fd73 | 3378 | * ip - atime updated |
34dc7c2f | 3379 | */ |
e5c39b95 | 3380 | int |
d0cd9a5c | 3381 | zfs_readlink(struct inode *ip, zfs_uio_t *uio, cred_t *cr) |
34dc7c2f | 3382 | { |
ef70eff1 | 3383 | (void) cr; |
3558fd73 | 3384 | znode_t *zp = ITOZ(ip); |
0037b49e | 3385 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
34dc7c2f BB |
3386 | int error; |
3387 | ||
768eaced CC |
3388 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
3389 | return (error); | |
34dc7c2f | 3390 | |
572e2857 | 3391 | mutex_enter(&zp->z_lock); |
428870ff | 3392 | if (zp->z_is_sa) |
8b4f9a2d | 3393 | error = sa_lookup_uio(zp->z_sa_hdl, |
0037b49e | 3394 | SA_ZPL_SYMLINK(zfsvfs), uio); |
428870ff | 3395 | else |
8b4f9a2d | 3396 | error = zfs_sa_readlink(zp, uio); |
572e2857 | 3397 | mutex_exit(&zp->z_lock); |
34dc7c2f | 3398 | |
768eaced | 3399 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3400 | return (error); |
3401 | } | |
3402 | ||
3403 | /* | |
657ce253 | 3404 | * Insert a new entry into directory tdzp referencing szp. |
34dc7c2f | 3405 | * |
657ce253 MM |
3406 | * IN: tdzp - Directory to contain new entry. |
3407 | * szp - znode of new entry. | |
34dc7c2f BB |
3408 | * name - name of new entry. |
3409 | * cr - credentials of caller. | |
841a7a98 | 3410 | * flags - case flags. |
34dc7c2f BB |
3411 | * |
3412 | * RETURN: 0 if success | |
3413 | * error code if failure | |
3414 | * | |
3415 | * Timestamps: | |
657ce253 MM |
3416 | * tdzp - ctime|mtime updated |
3417 | * szp - ctime updated | |
34dc7c2f | 3418 | */ |
e5c39b95 | 3419 | int |
657ce253 | 3420 | zfs_link(znode_t *tdzp, znode_t *szp, char *name, cred_t *cr, |
da5e151f | 3421 | int flags) |
34dc7c2f | 3422 | { |
657ce253 MM |
3423 | struct inode *sip = ZTOI(szp); |
3424 | znode_t *tzp; | |
3425 | zfsvfs_t *zfsvfs = ZTOZSB(tdzp); | |
34dc7c2f BB |
3426 | zilog_t *zilog; |
3427 | zfs_dirlock_t *dl; | |
3428 | dmu_tx_t *tx; | |
34dc7c2f BB |
3429 | int error; |
3430 | int zf = ZNEW; | |
428870ff | 3431 | uint64_t parent; |
572e2857 | 3432 | uid_t owner; |
e8b96c60 | 3433 | boolean_t waited = B_FALSE; |
ace1eae8 CC |
3434 | boolean_t is_tmpfile = 0; |
3435 | uint64_t txg; | |
3436 | #ifdef HAVE_TMPFILE | |
3437 | is_tmpfile = (sip->i_nlink == 0 && (sip->i_state & I_LINKABLE)); | |
3438 | #endif | |
657ce253 | 3439 | ASSERT(S_ISDIR(ZTOI(tdzp)->i_mode)); |
34dc7c2f | 3440 | |
32dec7bd | 3441 | if (name == NULL) |
3442 | return (SET_ERROR(EINVAL)); | |
3443 | ||
768eaced CC |
3444 | if ((error = zfs_enter_verify_zp(zfsvfs, tdzp, FTAG)) != 0) |
3445 | return (error); | |
0037b49e | 3446 | zilog = zfsvfs->z_log; |
34dc7c2f | 3447 | |
428870ff BB |
3448 | /* |
3449 | * POSIX dictates that we return EPERM here. | |
3450 | * Better choices include ENOTSUP or EISDIR. | |
3451 | */ | |
3558fd73 | 3452 | if (S_ISDIR(sip->i_mode)) { |
768eaced | 3453 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3454 | return (SET_ERROR(EPERM)); |
428870ff BB |
3455 | } |
3456 | ||
768eaced CC |
3457 | if ((error = zfs_verify_zp(szp)) != 0) { |
3458 | zfs_exit(zfsvfs, FTAG); | |
3459 | return (error); | |
3460 | } | |
812e91a7 | 3461 | |
9c5167d1 NF |
3462 | /* |
3463 | * If we are using project inheritance, means if the directory has | |
3464 | * ZFS_PROJINHERIT set, then its descendant directories will inherit | |
3465 | * not only the project ID, but also the ZFS_PROJINHERIT flag. Under | |
3466 | * such case, we only allow hard link creation in our tree when the | |
3467 | * project IDs are the same. | |
3468 | */ | |
657ce253 MM |
3469 | if (tdzp->z_pflags & ZFS_PROJINHERIT && |
3470 | tdzp->z_projid != szp->z_projid) { | |
768eaced | 3471 | zfs_exit(zfsvfs, FTAG); |
9c5167d1 NF |
3472 | return (SET_ERROR(EXDEV)); |
3473 | } | |
3474 | ||
812e91a7 MT |
3475 | /* |
3476 | * We check i_sb because snapshots and the ctldir must have different | |
3477 | * super blocks. | |
3478 | */ | |
657ce253 | 3479 | if (sip->i_sb != ZTOI(tdzp)->i_sb || zfsctl_is_node(sip)) { |
768eaced | 3480 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3481 | return (SET_ERROR(EXDEV)); |
34dc7c2f | 3482 | } |
428870ff | 3483 | |
428870ff BB |
3484 | /* Prevent links to .zfs/shares files */ |
3485 | ||
0037b49e | 3486 | if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), |
428870ff | 3487 | &parent, sizeof (uint64_t))) != 0) { |
768eaced | 3488 | zfs_exit(zfsvfs, FTAG); |
428870ff BB |
3489 | return (error); |
3490 | } | |
0037b49e | 3491 | if (parent == zfsvfs->z_shares_dir) { |
768eaced | 3492 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3493 | return (SET_ERROR(EPERM)); |
428870ff BB |
3494 | } |
3495 | ||
0037b49e | 3496 | if (zfsvfs->z_utf8 && u8_validate(name, |
34dc7c2f | 3497 | strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { |
768eaced | 3498 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3499 | return (SET_ERROR(EILSEQ)); |
34dc7c2f BB |
3500 | } |
3501 | if (flags & FIGNORECASE) | |
3502 | zf |= ZCILOOK; | |
3503 | ||
34dc7c2f BB |
3504 | /* |
3505 | * We do not support links between attributes and non-attributes | |
3506 | * because of the potential security risk of creating links | |
3507 | * into "normal" file space in order to circumvent restrictions | |
3508 | * imposed in attribute space. | |
3509 | */ | |
657ce253 | 3510 | if ((szp->z_pflags & ZFS_XATTR) != (tdzp->z_pflags & ZFS_XATTR)) { |
768eaced | 3511 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3512 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
3513 | } |
3514 | ||
0037b49e BB |
3515 | owner = zfs_fuid_map_id(zfsvfs, KUID_TO_SUID(sip->i_uid), |
3516 | cr, ZFS_OWNER); | |
572e2857 | 3517 | if (owner != crgetuid(cr) && secpolicy_basic_link(cr) != 0) { |
768eaced | 3518 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 3519 | return (SET_ERROR(EPERM)); |
34dc7c2f BB |
3520 | } |
3521 | ||
f224eddf | 3522 | if ((error = zfs_zaccess(tdzp, ACE_ADD_FILE, 0, B_FALSE, cr, |
d4dc53da | 3523 | zfs_init_idmap))) { |
768eaced | 3524 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3525 | return (error); |
3526 | } | |
3527 | ||
428870ff | 3528 | top: |
34dc7c2f BB |
3529 | /* |
3530 | * Attempt to lock directory; fail if entry already exists. | |
3531 | */ | |
657ce253 | 3532 | error = zfs_dirent_lock(&dl, tdzp, name, &tzp, zf, NULL, NULL); |
34dc7c2f | 3533 | if (error) { |
768eaced | 3534 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3535 | return (error); |
3536 | } | |
3537 | ||
0037b49e | 3538 | tx = dmu_tx_create(zfsvfs->z_os); |
428870ff | 3539 | dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); |
657ce253 | 3540 | dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, name); |
ace1eae8 | 3541 | if (is_tmpfile) |
0037b49e | 3542 | dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
ace1eae8 | 3543 | |
428870ff | 3544 | zfs_sa_upgrade_txholds(tx, szp); |
657ce253 | 3545 | zfs_sa_upgrade_txholds(tx, tdzp); |
0735ecb3 | 3546 | error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); |
34dc7c2f BB |
3547 | if (error) { |
3548 | zfs_dirent_unlock(dl); | |
fb5f0bc8 | 3549 | if (error == ERESTART) { |
e8b96c60 | 3550 | waited = B_TRUE; |
34dc7c2f BB |
3551 | dmu_tx_wait(tx); |
3552 | dmu_tx_abort(tx); | |
3553 | goto top; | |
3554 | } | |
3555 | dmu_tx_abort(tx); | |
768eaced | 3556 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3557 | return (error); |
3558 | } | |
ace1eae8 CC |
3559 | /* unmark z_unlinked so zfs_link_create will not reject */ |
3560 | if (is_tmpfile) | |
a43570c5 | 3561 | szp->z_unlinked = B_FALSE; |
34dc7c2f BB |
3562 | error = zfs_link_create(dl, szp, tx, 0); |
3563 | ||
3564 | if (error == 0) { | |
3565 | uint64_t txtype = TX_LINK; | |
ace1eae8 CC |
3566 | /* |
3567 | * tmpfile is created to be in z_unlinkedobj, so remove it. | |
e1cfd73f | 3568 | * Also, we don't log in ZIL, because all previous file |
ace1eae8 CC |
3569 | * operation on the tmpfile are ignored by ZIL. Instead we |
3570 | * always wait for txg to sync to make sure all previous | |
3571 | * operation are sync safe. | |
3572 | */ | |
3573 | if (is_tmpfile) { | |
0037b49e BB |
3574 | VERIFY(zap_remove_int(zfsvfs->z_os, |
3575 | zfsvfs->z_unlinkedobj, szp->z_id, tx) == 0); | |
ace1eae8 CC |
3576 | } else { |
3577 | if (flags & FIGNORECASE) | |
3578 | txtype |= TX_CI; | |
657ce253 | 3579 | zfs_log_link(zilog, tx, txtype, tdzp, szp, name); |
ace1eae8 CC |
3580 | } |
3581 | } else if (is_tmpfile) { | |
3582 | /* restore z_unlinked since when linking failed */ | |
a43570c5 | 3583 | szp->z_unlinked = B_TRUE; |
34dc7c2f | 3584 | } |
ace1eae8 | 3585 | txg = dmu_tx_get_txg(tx); |
34dc7c2f BB |
3586 | dmu_tx_commit(tx); |
3587 | ||
3588 | zfs_dirent_unlock(dl); | |
3589 | ||
0037b49e | 3590 | if (!is_tmpfile && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) |
572e2857 | 3591 | zil_commit(zilog, 0); |
428870ff | 3592 | |
d09dc598 | 3593 | if (is_tmpfile && zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) |
0037b49e | 3594 | txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), txg); |
ace1eae8 | 3595 | |
fc273894 KHN |
3596 | zfs_znode_update_vfs(tdzp); |
3597 | zfs_znode_update_vfs(szp); | |
768eaced | 3598 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
3599 | return (error); |
3600 | } | |
3601 | ||
3c0e5c0f | 3602 | static void |
411f4a01 | 3603 | zfs_putpage_sync_commit_cb(void *arg) |
3c0e5c0f BB |
3604 | { |
3605 | struct page *pp = arg; | |
3606 | ||
119a394a | 3607 | ClearPageError(pp); |
3c0e5c0f BB |
3608 | end_page_writeback(pp); |
3609 | } | |
3610 | ||
411f4a01 SN |
3611 | static void |
3612 | zfs_putpage_async_commit_cb(void *arg) | |
3613 | { | |
3614 | struct page *pp = arg; | |
3615 | znode_t *zp = ITOZ(pp->mapping->host); | |
3616 | ||
3617 | ClearPageError(pp); | |
3618 | end_page_writeback(pp); | |
3619 | atomic_dec_32(&zp->z_async_writes_cnt); | |
3620 | } | |
3621 | ||
34dc7c2f | 3622 | /* |
3c0e5c0f BB |
3623 | * Push a page out to disk, once the page is on stable storage the |
3624 | * registered commit callback will be run as notification of completion. | |
34dc7c2f | 3625 | * |
411f4a01 SN |
3626 | * IN: ip - page mapped for inode. |
3627 | * pp - page to push (page is locked) | |
3628 | * wbc - writeback control data | |
3629 | * for_sync - does the caller intend to wait synchronously for the | |
3630 | * page writeback to complete? | |
34dc7c2f BB |
3631 | * |
3632 | * RETURN: 0 if success | |
3633 | * error code if failure | |
3634 | * | |
3c0e5c0f BB |
3635 | * Timestamps: |
3636 | * ip - ctime|mtime updated | |
34dc7c2f | 3637 | */ |
3c0e5c0f | 3638 | int |
411f4a01 SN |
3639 | zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc, |
3640 | boolean_t for_sync) | |
34dc7c2f | 3641 | { |
3c0e5c0f | 3642 | znode_t *zp = ITOZ(ip); |
0037b49e | 3643 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
3c0e5c0f BB |
3644 | loff_t offset; |
3645 | loff_t pgoff; | |
4c837f0d | 3646 | unsigned int pglen; |
3c0e5c0f BB |
3647 | dmu_tx_t *tx; |
3648 | caddr_t va; | |
3649 | int err = 0; | |
3650 | uint64_t mtime[2], ctime[2]; | |
3651 | sa_bulk_attr_t bulk[3]; | |
3652 | int cnt = 0; | |
21a96fb6 | 3653 | struct address_space *mapping; |
3c0e5c0f | 3654 | |
768eaced CC |
3655 | if ((err = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
3656 | return (err); | |
d164b209 | 3657 | |
3c0e5c0f BB |
3658 | ASSERT(PageLocked(pp)); |
3659 | ||
d1d7e268 MK |
3660 | pgoff = page_offset(pp); /* Page byte-offset in file */ |
3661 | offset = i_size_read(ip); /* File length in bytes */ | |
8b1899d3 BB |
3662 | pglen = MIN(PAGE_SIZE, /* Page length in bytes */ |
3663 | P2ROUNDUP(offset, PAGE_SIZE)-pgoff); | |
3c0e5c0f BB |
3664 | |
3665 | /* Page is beyond end of file */ | |
3666 | if (pgoff >= offset) { | |
3667 | unlock_page(pp); | |
768eaced | 3668 | zfs_exit(zfsvfs, FTAG); |
3c0e5c0f BB |
3669 | return (0); |
3670 | } | |
3671 | ||
3672 | /* Truncate page length to end of file */ | |
3673 | if (pgoff + pglen > offset) | |
3674 | pglen = offset - pgoff; | |
3675 | ||
3676 | #if 0 | |
34dc7c2f | 3677 | /* |
3c0e5c0f BB |
3678 | * FIXME: Allow mmap writes past its quota. The correct fix |
3679 | * is to register a page_mkwrite() handler to count the page | |
3680 | * against its quota when it is about to be dirtied. | |
34dc7c2f | 3681 | */ |
9c5167d1 NF |
3682 | if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, |
3683 | KUID_TO_SUID(ip->i_uid)) || | |
3684 | zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, | |
3685 | KGID_TO_SGID(ip->i_gid)) || | |
3686 | (zp->z_projid != ZFS_DEFAULT_PROJID && | |
3687 | zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT, | |
3688 | zp->z_projid))) { | |
9babb374 | 3689 | err = EDQUOT; |
9babb374 | 3690 | } |
3c0e5c0f BB |
3691 | #endif |
3692 | ||
d958324f BB |
3693 | /* |
3694 | * The ordering here is critical and must adhere to the following | |
3695 | * rules in order to avoid deadlocking in either zfs_read() or | |
3696 | * zfs_free_range() due to a lock inversion. | |
3697 | * | |
3698 | * 1) The page must be unlocked prior to acquiring the range lock. | |
3699 | * This is critical because zfs_read() calls find_lock_page() | |
3700 | * which may block on the page lock while holding the range lock. | |
3701 | * | |
3702 | * 2) Before setting or clearing write back on a page the range lock | |
3703 | * must be held in order to prevent a lock inversion with the | |
3704 | * zfs_free_range() function. | |
21a96fb6 CC |
3705 | * |
3706 | * This presents a problem because upon entering this function the | |
3707 | * page lock is already held. To safely acquire the range lock the | |
3708 | * page lock must be dropped. This creates a window where another | |
3709 | * process could truncate, invalidate, dirty, or write out the page. | |
3710 | * | |
3711 | * Therefore, after successfully reacquiring the range and page locks | |
3712 | * the current page state is checked. In the common case everything | |
3713 | * will be as is expected and it can be written out. However, if | |
3714 | * the page state has changed it must be handled accordingly. | |
d958324f | 3715 | */ |
21a96fb6 CC |
3716 | mapping = pp->mapping; |
3717 | redirty_page_for_writepage(wbc, pp); | |
d958324f | 3718 | unlock_page(pp); |
21a96fb6 | 3719 | |
bd4dde8e | 3720 | zfs_locked_range_t *lr = zfs_rangelock_enter(&zp->z_rangelock, |
5d43cc9a | 3721 | pgoff, pglen, RL_WRITER); |
21a96fb6 CC |
3722 | lock_page(pp); |
3723 | ||
3724 | /* Page mapping changed or it was no longer dirty, we're done */ | |
3725 | if (unlikely((mapping != pp->mapping) || !PageDirty(pp))) { | |
3726 | unlock_page(pp); | |
2cc479d0 | 3727 | zfs_rangelock_exit(lr); |
768eaced | 3728 | zfs_exit(zfsvfs, FTAG); |
21a96fb6 CC |
3729 | return (0); |
3730 | } | |
3731 | ||
3732 | /* Another process started write block if required */ | |
3733 | if (PageWriteback(pp)) { | |
3734 | unlock_page(pp); | |
2cc479d0 | 3735 | zfs_rangelock_exit(lr); |
21a96fb6 | 3736 | |
bfd5a709 | 3737 | if (wbc->sync_mode != WB_SYNC_NONE) { |
411f4a01 SN |
3738 | /* |
3739 | * Speed up any non-sync page writebacks since | |
3740 | * they may take several seconds to complete. | |
3741 | * Refer to the comment in zpl_fsync() (when | |
3742 | * HAVE_FSYNC_RANGE is defined) for details. | |
3743 | */ | |
3744 | if (atomic_load_32(&zp->z_async_writes_cnt) > 0) { | |
3745 | zil_commit(zfsvfs->z_log, zp->z_id); | |
3746 | } | |
3747 | ||
bfd5a709 | 3748 | if (PageWriteback(pp)) |
c0fb44c5 CK |
3749 | #ifdef HAVE_PAGEMAP_FOLIO_WAIT_BIT |
3750 | folio_wait_bit(page_folio(pp), PG_writeback); | |
3751 | #else | |
bfd5a709 | 3752 | wait_on_page_bit(pp, PG_writeback); |
c0fb44c5 | 3753 | #endif |
bfd5a709 | 3754 | } |
21a96fb6 | 3755 | |
768eaced | 3756 | zfs_exit(zfsvfs, FTAG); |
21a96fb6 CC |
3757 | return (0); |
3758 | } | |
3759 | ||
3760 | /* Clear the dirty flag the required locks are held */ | |
3761 | if (!clear_page_dirty_for_io(pp)) { | |
3762 | unlock_page(pp); | |
2cc479d0 | 3763 | zfs_rangelock_exit(lr); |
768eaced | 3764 | zfs_exit(zfsvfs, FTAG); |
21a96fb6 CC |
3765 | return (0); |
3766 | } | |
3767 | ||
3768 | /* | |
3769 | * Counterpart for redirty_page_for_writepage() above. This page | |
3770 | * was in fact not skipped and should not be counted as if it were. | |
3771 | */ | |
3772 | wbc->pages_skipped--; | |
411f4a01 SN |
3773 | if (!for_sync) |
3774 | atomic_inc_32(&zp->z_async_writes_cnt); | |
3c0e5c0f | 3775 | set_page_writeback(pp); |
21a96fb6 | 3776 | unlock_page(pp); |
3c0e5c0f | 3777 | |
0037b49e | 3778 | tx = dmu_tx_create(zfsvfs->z_os); |
3c0e5c0f | 3779 | dmu_tx_hold_write(tx, zp->z_id, pgoff, pglen); |
428870ff BB |
3780 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
3781 | zfs_sa_upgrade_txholds(tx, zp); | |
d958324f | 3782 | |
fb5f0bc8 | 3783 | err = dmu_tx_assign(tx, TXG_NOWAIT); |
34dc7c2f | 3784 | if (err != 0) { |
3c0e5c0f | 3785 | if (err == ERESTART) |
34dc7c2f | 3786 | dmu_tx_wait(tx); |
3c0e5c0f | 3787 | |
34dc7c2f | 3788 | dmu_tx_abort(tx); |
7dde17e8 SP |
3789 | #ifdef HAVE_VFS_FILEMAP_DIRTY_FOLIO |
3790 | filemap_dirty_folio(page_mapping(pp), page_folio(pp)); | |
3791 | #else | |
119a394a | 3792 | __set_page_dirty_nobuffers(pp); |
7dde17e8 | 3793 | #endif |
119a394a ED |
3794 | ClearPageError(pp); |
3795 | end_page_writeback(pp); | |
411f4a01 SN |
3796 | if (!for_sync) |
3797 | atomic_dec_32(&zp->z_async_writes_cnt); | |
2cc479d0 | 3798 | zfs_rangelock_exit(lr); |
768eaced | 3799 | zfs_exit(zfsvfs, FTAG); |
3c0e5c0f | 3800 | return (err); |
34dc7c2f BB |
3801 | } |
3802 | ||
dde471ef | 3803 | va = kmap(pp); |
8b1899d3 | 3804 | ASSERT3U(pglen, <=, PAGE_SIZE); |
0037b49e | 3805 | dmu_write(zfsvfs->z_os, zp->z_id, pgoff, pglen, va, tx); |
dde471ef | 3806 | kunmap(pp); |
34dc7c2f | 3807 | |
0037b49e BB |
3808 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); |
3809 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); | |
3810 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(zfsvfs), NULL, | |
3811 | &zp->z_pflags, 8); | |
428870ff | 3812 | |
d3aa3ea9 BB |
3813 | /* Preserve the mtime and ctime provided by the inode */ |
3814 | ZFS_TIME_ENCODE(&ip->i_mtime, mtime); | |
3815 | ZFS_TIME_ENCODE(&ip->i_ctime, ctime); | |
a43570c5 | 3816 | zp->z_atime_dirty = B_FALSE; |
d3aa3ea9 BB |
3817 | zp->z_seq++; |
3818 | ||
3819 | err = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx); | |
3820 | ||
0037b49e | 3821 | zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, pgoff, pglen, 0, |
411f4a01 SN |
3822 | for_sync ? zfs_putpage_sync_commit_cb : |
3823 | zfs_putpage_async_commit_cb, pp); | |
3824 | ||
45d1cae3 | 3825 | dmu_tx_commit(tx); |
d3aa3ea9 | 3826 | |
2cc479d0 | 3827 | zfs_rangelock_exit(lr); |
34dc7c2f | 3828 | |
119a394a ED |
3829 | if (wbc->sync_mode != WB_SYNC_NONE) { |
3830 | /* | |
3831 | * Note that this is rarely called under writepages(), because | |
3832 | * writepages() normally handles the entire commit for | |
3833 | * performance reasons. | |
3834 | */ | |
0037b49e | 3835 | zil_commit(zfsvfs->z_log, zp->z_id); |
411f4a01 SN |
3836 | } else if (!for_sync && atomic_load_32(&zp->z_sync_writes_cnt) > 0) { |
3837 | /* | |
3838 | * If the caller does not intend to wait synchronously | |
3839 | * for this page writeback to complete and there are active | |
3840 | * synchronous calls on this file, do a commit so that | |
3841 | * the latter don't accidentally end up waiting for | |
3842 | * our writeback to complete. Refer to the comment in | |
3843 | * zpl_fsync() (when HAVE_FSYNC_RANGE is defined) for details. | |
3844 | */ | |
3845 | zil_commit(zfsvfs->z_log, zp->z_id); | |
2b286136 | 3846 | } |
3c0e5c0f | 3847 | |
3819aaaf MB |
3848 | dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, pglen); |
3849 | ||
768eaced | 3850 | zfs_exit(zfsvfs, FTAG); |
3c0e5c0f | 3851 | return (err); |
34dc7c2f BB |
3852 | } |
3853 | ||
8780c539 BB |
3854 | /* |
3855 | * Update the system attributes when the inode has been dirtied. For the | |
023699cd | 3856 | * moment we only update the mode, atime, mtime, and ctime. |
8780c539 BB |
3857 | */ |
3858 | int | |
3859 | zfs_dirty_inode(struct inode *ip, int flags) | |
3860 | { | |
3861 | znode_t *zp = ITOZ(ip); | |
0037b49e | 3862 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
8780c539 | 3863 | dmu_tx_t *tx; |
023699cd MM |
3864 | uint64_t mode, atime[2], mtime[2], ctime[2]; |
3865 | sa_bulk_attr_t bulk[4]; | |
704cd075 | 3866 | int error = 0; |
8780c539 BB |
3867 | int cnt = 0; |
3868 | ||
0037b49e | 3869 | if (zfs_is_readonly(zfsvfs) || dmu_objset_is_snapshot(zfsvfs->z_os)) |
c944be5d BB |
3870 | return (0); |
3871 | ||
768eaced CC |
3872 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
3873 | return (error); | |
8780c539 | 3874 | |
704cd075 CC |
3875 | #ifdef I_DIRTY_TIME |
3876 | /* | |
e1cfd73f | 3877 | * This is the lazytime semantic introduced in Linux 4.0 |
704cd075 CC |
3878 | * This flag will only be called from update_time when lazytime is set. |
3879 | * (Note, I_DIRTY_SYNC will also set if not lazytime) | |
3880 | * Fortunately mtime and ctime are managed within ZFS itself, so we | |
3881 | * only need to dirty atime. | |
3882 | */ | |
3883 | if (flags == I_DIRTY_TIME) { | |
a43570c5 | 3884 | zp->z_atime_dirty = B_TRUE; |
704cd075 CC |
3885 | goto out; |
3886 | } | |
3887 | #endif | |
3888 | ||
0037b49e | 3889 | tx = dmu_tx_create(zfsvfs->z_os); |
8780c539 BB |
3890 | |
3891 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); | |
3892 | zfs_sa_upgrade_txholds(tx, zp); | |
3893 | ||
3894 | error = dmu_tx_assign(tx, TXG_WAIT); | |
3895 | if (error) { | |
3896 | dmu_tx_abort(tx); | |
3897 | goto out; | |
3898 | } | |
3899 | ||
3900 | mutex_enter(&zp->z_lock); | |
a43570c5 | 3901 | zp->z_atime_dirty = B_FALSE; |
704cd075 | 3902 | |
0037b49e BB |
3903 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); |
3904 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16); | |
3905 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); | |
3906 | SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); | |
8780c539 | 3907 | |
023699cd | 3908 | /* Preserve the mode, mtime and ctime provided by the inode */ |
8780c539 BB |
3909 | ZFS_TIME_ENCODE(&ip->i_atime, atime); |
3910 | ZFS_TIME_ENCODE(&ip->i_mtime, mtime); | |
3911 | ZFS_TIME_ENCODE(&ip->i_ctime, ctime); | |
023699cd MM |
3912 | mode = ip->i_mode; |
3913 | ||
3914 | zp->z_mode = mode; | |
8780c539 BB |
3915 | |
3916 | error = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx); | |
3917 | mutex_exit(&zp->z_lock); | |
3918 | ||
3919 | dmu_tx_commit(tx); | |
3920 | out: | |
768eaced | 3921 | zfs_exit(zfsvfs, FTAG); |
8780c539 BB |
3922 | return (error); |
3923 | } | |
8780c539 | 3924 | |
34dc7c2f | 3925 | void |
c0d35759 | 3926 | zfs_inactive(struct inode *ip) |
34dc7c2f | 3927 | { |
c0d35759 | 3928 | znode_t *zp = ITOZ(ip); |
0037b49e | 3929 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
0df9673f | 3930 | uint64_t atime[2]; |
34dc7c2f | 3931 | int error; |
cafbd2ac | 3932 | int need_unlock = 0; |
34dc7c2f | 3933 | |
cafbd2ac | 3934 | /* Only read lock if we haven't already write locked, e.g. rollback */ |
0037b49e | 3935 | if (!RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)) { |
cafbd2ac | 3936 | need_unlock = 1; |
0037b49e | 3937 | rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); |
cafbd2ac | 3938 | } |
c0d35759 | 3939 | if (zp->z_sa_hdl == NULL) { |
cafbd2ac | 3940 | if (need_unlock) |
0037b49e | 3941 | rw_exit(&zfsvfs->z_teardown_inactive_lock); |
c0d35759 | 3942 | return; |
34dc7c2f BB |
3943 | } |
3944 | ||
a43570c5 | 3945 | if (zp->z_atime_dirty && zp->z_unlinked == B_FALSE) { |
0037b49e | 3946 | dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); |
34dc7c2f | 3947 | |
428870ff BB |
3948 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
3949 | zfs_sa_upgrade_txholds(tx, zp); | |
34dc7c2f BB |
3950 | error = dmu_tx_assign(tx, TXG_WAIT); |
3951 | if (error) { | |
3952 | dmu_tx_abort(tx); | |
3953 | } else { | |
0df9673f | 3954 | ZFS_TIME_ENCODE(&ip->i_atime, atime); |
34dc7c2f | 3955 | mutex_enter(&zp->z_lock); |
0037b49e | 3956 | (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs), |
0df9673f | 3957 | (void *)&atime, sizeof (atime), tx); |
a43570c5 | 3958 | zp->z_atime_dirty = B_FALSE; |
34dc7c2f BB |
3959 | mutex_exit(&zp->z_lock); |
3960 | dmu_tx_commit(tx); | |
3961 | } | |
3962 | } | |
3963 | ||
3964 | zfs_zinactive(zp); | |
cafbd2ac | 3965 | if (need_unlock) |
0037b49e | 3966 | rw_exit(&zfsvfs->z_teardown_inactive_lock); |
34dc7c2f BB |
3967 | } |
3968 | ||
34dc7c2f | 3969 | /* |
dde471ef | 3970 | * Fill pages with data from the disk. |
34dc7c2f BB |
3971 | */ |
3972 | static int | |
89cd2197 | 3973 | zfs_fillpage(struct inode *ip, struct page *pp) |
34dc7c2f | 3974 | { |
0037b49e | 3975 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
89cd2197 BB |
3976 | loff_t i_size = i_size_read(ip); |
3977 | u_offset_t io_off = page_offset(pp); | |
3978 | size_t io_len = PAGE_SIZE; | |
dde471ef | 3979 | |
dd108f5d RY |
3980 | ASSERT3U(io_off, <, i_size); |
3981 | ||
dde471ef PJ |
3982 | if (io_off + io_len > i_size) |
3983 | io_len = i_size - io_off; | |
34dc7c2f | 3984 | |
89cd2197 BB |
3985 | void *va = kmap(pp); |
3986 | int error = dmu_read(zfsvfs->z_os, ITOZ(ip)->z_id, io_off, | |
dd108f5d RY |
3987 | io_len, va, DMU_READ_PREFETCH); |
3988 | if (io_len != PAGE_SIZE) | |
3989 | memset((char *)va + io_len, 0, PAGE_SIZE - io_len); | |
89cd2197 | 3990 | kunmap(pp); |
d164b209 | 3991 | |
89cd2197 BB |
3992 | if (error) { |
3993 | /* convert checksum errors into IO errors */ | |
3994 | if (error == ECKSUM) | |
3995 | error = SET_ERROR(EIO); | |
3996 | ||
3997 | SetPageError(pp); | |
3998 | ClearPageUptodate(pp); | |
3999 | } else { | |
4000 | ClearPageError(pp); | |
4001 | SetPageUptodate(pp); | |
34dc7c2f | 4002 | } |
d164b209 | 4003 | |
89cd2197 | 4004 | return (error); |
34dc7c2f BB |
4005 | } |
4006 | ||
4007 | /* | |
89cd2197 | 4008 | * Uses zfs_fillpage to read data from the file and fill the page. |
34dc7c2f | 4009 | * |
dde471ef | 4010 | * IN: ip - inode of file to get data from. |
89cd2197 | 4011 | * pp - page to read |
34dc7c2f | 4012 | * |
d3cc8b15 | 4013 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
4014 | * |
4015 | * Timestamps: | |
4016 | * vp - atime updated | |
4017 | */ | |
dde471ef | 4018 | int |
89cd2197 | 4019 | zfs_getpage(struct inode *ip, struct page *pp) |
34dc7c2f | 4020 | { |
0037b49e | 4021 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
89cd2197 BB |
4022 | znode_t *zp = ITOZ(ip); |
4023 | int error; | |
34dc7c2f | 4024 | |
89cd2197 BB |
4025 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
4026 | return (error); | |
34dc7c2f | 4027 | |
89cd2197 BB |
4028 | error = zfs_fillpage(ip, pp); |
4029 | if (error == 0) | |
4030 | dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, PAGE_SIZE); | |
3819aaaf | 4031 | |
768eaced | 4032 | zfs_exit(zfsvfs, FTAG); |
89cd2197 BB |
4033 | |
4034 | return (error); | |
34dc7c2f BB |
4035 | } |
4036 | ||
4037 | /* | |
e2e7aa2d | 4038 | * Check ZFS specific permissions to memory map a section of a file. |
34dc7c2f | 4039 | * |
e2e7aa2d BB |
4040 | * IN: ip - inode of the file to mmap |
4041 | * off - file offset | |
4042 | * addrp - start address in memory region | |
4043 | * len - length of memory region | |
4044 | * vm_flags- address flags | |
34dc7c2f | 4045 | * |
e2e7aa2d BB |
4046 | * RETURN: 0 if success |
4047 | * error code if failure | |
34dc7c2f | 4048 | */ |
e2e7aa2d BB |
4049 | int |
4050 | zfs_map(struct inode *ip, offset_t off, caddr_t *addrp, size_t len, | |
4051 | unsigned long vm_flags) | |
34dc7c2f | 4052 | { |
ef70eff1 | 4053 | (void) addrp; |
e2e7aa2d | 4054 | znode_t *zp = ITOZ(ip); |
0037b49e | 4055 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
768eaced | 4056 | int error; |
34dc7c2f | 4057 | |
768eaced CC |
4058 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
4059 | return (error); | |
34dc7c2f | 4060 | |
e2e7aa2d | 4061 | if ((vm_flags & VM_WRITE) && (zp->z_pflags & |
428870ff | 4062 | (ZFS_IMMUTABLE | ZFS_READONLY | ZFS_APPENDONLY))) { |
768eaced | 4063 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 4064 | return (SET_ERROR(EPERM)); |
34dc7c2f BB |
4065 | } |
4066 | ||
e2e7aa2d | 4067 | if ((vm_flags & (VM_READ | VM_EXEC)) && |
428870ff | 4068 | (zp->z_pflags & ZFS_AV_QUARANTINED)) { |
768eaced | 4069 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 4070 | return (SET_ERROR(EACCES)); |
34dc7c2f BB |
4071 | } |
4072 | ||
34dc7c2f | 4073 | if (off < 0 || len > MAXOFFSET_T - off) { |
768eaced | 4074 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 4075 | return (SET_ERROR(ENXIO)); |
34dc7c2f BB |
4076 | } |
4077 | ||
768eaced | 4078 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
4079 | return (0); |
4080 | } | |
4081 | ||
4082 | /* | |
4083 | * Free or allocate space in a file. Currently, this function only | |
4084 | * supports the `F_FREESP' command. However, this command is somewhat | |
4085 | * misnamed, as its functionality includes the ability to allocate as | |
4086 | * well as free space. | |
4087 | * | |
657ce253 | 4088 | * IN: zp - znode of file to free data in. |
34dc7c2f BB |
4089 | * cmd - action to take (only F_FREESP supported). |
4090 | * bfp - section of file to free/alloc. | |
4091 | * flag - current file open mode flags. | |
4092 | * offset - current file offset. | |
a35c1207 | 4093 | * cr - credentials of caller. |
34dc7c2f | 4094 | * |
d3cc8b15 | 4095 | * RETURN: 0 on success, error code on failure. |
34dc7c2f BB |
4096 | * |
4097 | * Timestamps: | |
657ce253 | 4098 | * zp - ctime|mtime updated |
34dc7c2f | 4099 | */ |
e5c39b95 | 4100 | int |
657ce253 | 4101 | zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag, |
3558fd73 | 4102 | offset_t offset, cred_t *cr) |
34dc7c2f | 4103 | { |
ef70eff1 | 4104 | (void) offset; |
657ce253 | 4105 | zfsvfs_t *zfsvfs = ZTOZSB(zp); |
34dc7c2f BB |
4106 | uint64_t off, len; |
4107 | int error; | |
4108 | ||
768eaced CC |
4109 | if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0) |
4110 | return (error); | |
34dc7c2f | 4111 | |
34dc7c2f | 4112 | if (cmd != F_FREESP) { |
768eaced | 4113 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 4114 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
4115 | } |
4116 | ||
f3c9dca0 MT |
4117 | /* |
4118 | * Callers might not be able to detect properly that we are read-only, | |
4119 | * so check it explicitly here. | |
4120 | */ | |
0037b49e | 4121 | if (zfs_is_readonly(zfsvfs)) { |
768eaced | 4122 | zfs_exit(zfsvfs, FTAG); |
f3c9dca0 MT |
4123 | return (SET_ERROR(EROFS)); |
4124 | } | |
4125 | ||
34dc7c2f | 4126 | if (bfp->l_len < 0) { |
768eaced | 4127 | zfs_exit(zfsvfs, FTAG); |
2e528b49 | 4128 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
4129 | } |
4130 | ||
aec69371 ED |
4131 | /* |
4132 | * Permissions aren't checked on Solaris because on this OS | |
4133 | * zfs_space() can only be called with an opened file handle. | |
4134 | * On Linux we can get here through truncate_range() which | |
4135 | * operates directly on inodes, so we need to check access rights. | |
4136 | */ | |
f224eddf | 4137 | if ((error = zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr, |
d4dc53da | 4138 | zfs_init_idmap))) { |
768eaced | 4139 | zfs_exit(zfsvfs, FTAG); |
aec69371 ED |
4140 | return (error); |
4141 | } | |
4142 | ||
34dc7c2f BB |
4143 | off = bfp->l_start; |
4144 | len = bfp->l_len; /* 0 means from off to end of file */ | |
4145 | ||
b128c09f | 4146 | error = zfs_freesp(zp, off, len, flag, TRUE); |
34dc7c2f | 4147 | |
768eaced | 4148 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
4149 | return (error); |
4150 | } | |
4151 | ||
e5c39b95 | 4152 | int |
3558fd73 | 4153 | zfs_fid(struct inode *ip, fid_t *fidp) |
34dc7c2f | 4154 | { |
3558fd73 | 4155 | znode_t *zp = ITOZ(ip); |
0037b49e | 4156 | zfsvfs_t *zfsvfs = ITOZSB(ip); |
34dc7c2f | 4157 | uint32_t gen; |
428870ff | 4158 | uint64_t gen64; |
34dc7c2f BB |
4159 | uint64_t object = zp->z_id; |
4160 | zfid_short_t *zfid; | |
428870ff | 4161 | int size, i, error; |
34dc7c2f | 4162 | |
768eaced CC |
4163 | if ((error = zfs_enter(zfsvfs, FTAG)) != 0) |
4164 | return (error); | |
c074a7de AR |
4165 | |
4166 | if (fidp->fid_len < SHORT_FID_LEN) { | |
4167 | fidp->fid_len = SHORT_FID_LEN; | |
768eaced | 4168 | zfs_exit(zfsvfs, FTAG); |
c074a7de AR |
4169 | return (SET_ERROR(ENOSPC)); |
4170 | } | |
4171 | ||
768eaced CC |
4172 | if ((error = zfs_verify_zp(zp)) != 0) { |
4173 | zfs_exit(zfsvfs, FTAG); | |
4174 | return (error); | |
4175 | } | |
428870ff | 4176 | |
0037b49e | 4177 | if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), |
428870ff | 4178 | &gen64, sizeof (uint64_t))) != 0) { |
768eaced | 4179 | zfs_exit(zfsvfs, FTAG); |
428870ff BB |
4180 | return (error); |
4181 | } | |
4182 | ||
4183 | gen = (uint32_t)gen64; | |
34dc7c2f | 4184 | |
9b77d1c9 | 4185 | size = SHORT_FID_LEN; |
34dc7c2f BB |
4186 | |
4187 | zfid = (zfid_short_t *)fidp; | |
4188 | ||
4189 | zfid->zf_len = size; | |
4190 | ||
4191 | for (i = 0; i < sizeof (zfid->zf_object); i++) | |
4192 | zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); | |
4193 | ||
4194 | /* Must have a non-zero generation number to distinguish from .zfs */ | |
4195 | if (gen == 0) | |
4196 | gen = 1; | |
4197 | for (i = 0; i < sizeof (zfid->zf_gen); i++) | |
4198 | zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); | |
4199 | ||
768eaced | 4200 | zfs_exit(zfsvfs, FTAG); |
34dc7c2f BB |
4201 | return (0); |
4202 | } | |
4203 | ||
93ce2b4c | 4204 | #if defined(_KERNEL) |
f298b24d BB |
4205 | EXPORT_SYMBOL(zfs_open); |
4206 | EXPORT_SYMBOL(zfs_close); | |
f298b24d BB |
4207 | EXPORT_SYMBOL(zfs_lookup); |
4208 | EXPORT_SYMBOL(zfs_create); | |
4209 | EXPORT_SYMBOL(zfs_tmpfile); | |
4210 | EXPORT_SYMBOL(zfs_remove); | |
4211 | EXPORT_SYMBOL(zfs_mkdir); | |
4212 | EXPORT_SYMBOL(zfs_rmdir); | |
4213 | EXPORT_SYMBOL(zfs_readdir); | |
f298b24d BB |
4214 | EXPORT_SYMBOL(zfs_getattr_fast); |
4215 | EXPORT_SYMBOL(zfs_setattr); | |
4216 | EXPORT_SYMBOL(zfs_rename); | |
4217 | EXPORT_SYMBOL(zfs_symlink); | |
4218 | EXPORT_SYMBOL(zfs_readlink); | |
4219 | EXPORT_SYMBOL(zfs_link); | |
4220 | EXPORT_SYMBOL(zfs_inactive); | |
4221 | EXPORT_SYMBOL(zfs_space); | |
4222 | EXPORT_SYMBOL(zfs_fid); | |
f298b24d BB |
4223 | EXPORT_SYMBOL(zfs_getpage); |
4224 | EXPORT_SYMBOL(zfs_putpage); | |
4225 | EXPORT_SYMBOL(zfs_dirty_inode); | |
4226 | EXPORT_SYMBOL(zfs_map); | |
4227 | ||
7ada752a | 4228 | /* CSTYLED */ |
a966c564 K |
4229 | module_param(zfs_delete_blocks, ulong, 0644); |
4230 | MODULE_PARM_DESC(zfs_delete_blocks, "Delete files larger than N blocks async"); | |
09276fde | 4231 | |
c409e464 | 4232 | #endif |