Commit | Line | Data |
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1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
40ebd81d RD |
18 | #include <linux/log2.h> |
19 | ||
1da177e4 | 20 | #include "xfs.h" |
a844f451 | 21 | #include "xfs_fs.h" |
1da177e4 | 22 | #include "xfs_types.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_trans_priv.h" | |
27 | #include "xfs_sb.h" | |
28 | #include "xfs_ag.h" | |
1da177e4 | 29 | #include "xfs_mount.h" |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
a844f451 | 33 | #include "xfs_attr_sf.h" |
1da177e4 | 34 | #include "xfs_dinode.h" |
1da177e4 | 35 | #include "xfs_inode.h" |
1da177e4 | 36 | #include "xfs_buf_item.h" |
a844f451 NS |
37 | #include "xfs_inode_item.h" |
38 | #include "xfs_btree.h" | |
39 | #include "xfs_alloc.h" | |
40 | #include "xfs_ialloc.h" | |
41 | #include "xfs_bmap.h" | |
1da177e4 | 42 | #include "xfs_error.h" |
1da177e4 | 43 | #include "xfs_utils.h" |
1da177e4 | 44 | #include "xfs_quota.h" |
2a82b8be | 45 | #include "xfs_filestream.h" |
739bfb2a | 46 | #include "xfs_vnodeops.h" |
93848a99 | 47 | #include "xfs_cksum.h" |
0b1b213f | 48 | #include "xfs_trace.h" |
33479e05 | 49 | #include "xfs_icache.h" |
1da177e4 | 50 | |
1da177e4 LT |
51 | kmem_zone_t *xfs_ifork_zone; |
52 | kmem_zone_t *xfs_inode_zone; | |
1da177e4 LT |
53 | |
54 | /* | |
8f04c47a | 55 | * Used in xfs_itruncate_extents(). This is the maximum number of extents |
1da177e4 LT |
56 | * freed from a file in a single transaction. |
57 | */ | |
58 | #define XFS_ITRUNC_MAX_EXTENTS 2 | |
59 | ||
60 | STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *); | |
61 | STATIC int xfs_iformat_local(xfs_inode_t *, xfs_dinode_t *, int, int); | |
62 | STATIC int xfs_iformat_extents(xfs_inode_t *, xfs_dinode_t *, int); | |
63 | STATIC int xfs_iformat_btree(xfs_inode_t *, xfs_dinode_t *, int); | |
64 | ||
2a0ec1d9 DC |
65 | /* |
66 | * helper function to extract extent size hint from inode | |
67 | */ | |
68 | xfs_extlen_t | |
69 | xfs_get_extsz_hint( | |
70 | struct xfs_inode *ip) | |
71 | { | |
72 | if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize) | |
73 | return ip->i_d.di_extsize; | |
74 | if (XFS_IS_REALTIME_INODE(ip)) | |
75 | return ip->i_mount->m_sb.sb_rextsize; | |
76 | return 0; | |
77 | } | |
78 | ||
fa96acad DC |
79 | /* |
80 | * This is a wrapper routine around the xfs_ilock() routine used to centralize | |
81 | * some grungy code. It is used in places that wish to lock the inode solely | |
82 | * for reading the extents. The reason these places can't just call | |
83 | * xfs_ilock(SHARED) is that the inode lock also guards to bringing in of the | |
84 | * extents from disk for a file in b-tree format. If the inode is in b-tree | |
85 | * format, then we need to lock the inode exclusively until the extents are read | |
86 | * in. Locking it exclusively all the time would limit our parallelism | |
87 | * unnecessarily, though. What we do instead is check to see if the extents | |
88 | * have been read in yet, and only lock the inode exclusively if they have not. | |
89 | * | |
90 | * The function returns a value which should be given to the corresponding | |
91 | * xfs_iunlock_map_shared(). This value is the mode in which the lock was | |
92 | * actually taken. | |
93 | */ | |
94 | uint | |
95 | xfs_ilock_map_shared( | |
96 | xfs_inode_t *ip) | |
97 | { | |
98 | uint lock_mode; | |
99 | ||
100 | if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) && | |
101 | ((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) { | |
102 | lock_mode = XFS_ILOCK_EXCL; | |
103 | } else { | |
104 | lock_mode = XFS_ILOCK_SHARED; | |
105 | } | |
106 | ||
107 | xfs_ilock(ip, lock_mode); | |
108 | ||
109 | return lock_mode; | |
110 | } | |
111 | ||
112 | /* | |
113 | * This is simply the unlock routine to go with xfs_ilock_map_shared(). | |
114 | * All it does is call xfs_iunlock() with the given lock_mode. | |
115 | */ | |
116 | void | |
117 | xfs_iunlock_map_shared( | |
118 | xfs_inode_t *ip, | |
119 | unsigned int lock_mode) | |
120 | { | |
121 | xfs_iunlock(ip, lock_mode); | |
122 | } | |
123 | ||
124 | /* | |
125 | * The xfs inode contains 2 locks: a multi-reader lock called the | |
126 | * i_iolock and a multi-reader lock called the i_lock. This routine | |
127 | * allows either or both of the locks to be obtained. | |
128 | * | |
129 | * The 2 locks should always be ordered so that the IO lock is | |
130 | * obtained first in order to prevent deadlock. | |
131 | * | |
132 | * ip -- the inode being locked | |
133 | * lock_flags -- this parameter indicates the inode's locks | |
134 | * to be locked. It can be: | |
135 | * XFS_IOLOCK_SHARED, | |
136 | * XFS_IOLOCK_EXCL, | |
137 | * XFS_ILOCK_SHARED, | |
138 | * XFS_ILOCK_EXCL, | |
139 | * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED, | |
140 | * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL, | |
141 | * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED, | |
142 | * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL | |
143 | */ | |
144 | void | |
145 | xfs_ilock( | |
146 | xfs_inode_t *ip, | |
147 | uint lock_flags) | |
148 | { | |
149 | trace_xfs_ilock(ip, lock_flags, _RET_IP_); | |
150 | ||
151 | /* | |
152 | * You can't set both SHARED and EXCL for the same lock, | |
153 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
154 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
155 | */ | |
156 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
157 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
158 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != | |
159 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
160 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); | |
161 | ||
162 | if (lock_flags & XFS_IOLOCK_EXCL) | |
163 | mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); | |
164 | else if (lock_flags & XFS_IOLOCK_SHARED) | |
165 | mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); | |
166 | ||
167 | if (lock_flags & XFS_ILOCK_EXCL) | |
168 | mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
169 | else if (lock_flags & XFS_ILOCK_SHARED) | |
170 | mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
171 | } | |
172 | ||
173 | /* | |
174 | * This is just like xfs_ilock(), except that the caller | |
175 | * is guaranteed not to sleep. It returns 1 if it gets | |
176 | * the requested locks and 0 otherwise. If the IO lock is | |
177 | * obtained but the inode lock cannot be, then the IO lock | |
178 | * is dropped before returning. | |
179 | * | |
180 | * ip -- the inode being locked | |
181 | * lock_flags -- this parameter indicates the inode's locks to be | |
182 | * to be locked. See the comment for xfs_ilock() for a list | |
183 | * of valid values. | |
184 | */ | |
185 | int | |
186 | xfs_ilock_nowait( | |
187 | xfs_inode_t *ip, | |
188 | uint lock_flags) | |
189 | { | |
190 | trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_); | |
191 | ||
192 | /* | |
193 | * You can't set both SHARED and EXCL for the same lock, | |
194 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
195 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
196 | */ | |
197 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
198 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
199 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != | |
200 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
201 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); | |
202 | ||
203 | if (lock_flags & XFS_IOLOCK_EXCL) { | |
204 | if (!mrtryupdate(&ip->i_iolock)) | |
205 | goto out; | |
206 | } else if (lock_flags & XFS_IOLOCK_SHARED) { | |
207 | if (!mrtryaccess(&ip->i_iolock)) | |
208 | goto out; | |
209 | } | |
210 | if (lock_flags & XFS_ILOCK_EXCL) { | |
211 | if (!mrtryupdate(&ip->i_lock)) | |
212 | goto out_undo_iolock; | |
213 | } else if (lock_flags & XFS_ILOCK_SHARED) { | |
214 | if (!mrtryaccess(&ip->i_lock)) | |
215 | goto out_undo_iolock; | |
216 | } | |
217 | return 1; | |
218 | ||
219 | out_undo_iolock: | |
220 | if (lock_flags & XFS_IOLOCK_EXCL) | |
221 | mrunlock_excl(&ip->i_iolock); | |
222 | else if (lock_flags & XFS_IOLOCK_SHARED) | |
223 | mrunlock_shared(&ip->i_iolock); | |
224 | out: | |
225 | return 0; | |
226 | } | |
227 | ||
228 | /* | |
229 | * xfs_iunlock() is used to drop the inode locks acquired with | |
230 | * xfs_ilock() and xfs_ilock_nowait(). The caller must pass | |
231 | * in the flags given to xfs_ilock() or xfs_ilock_nowait() so | |
232 | * that we know which locks to drop. | |
233 | * | |
234 | * ip -- the inode being unlocked | |
235 | * lock_flags -- this parameter indicates the inode's locks to be | |
236 | * to be unlocked. See the comment for xfs_ilock() for a list | |
237 | * of valid values for this parameter. | |
238 | * | |
239 | */ | |
240 | void | |
241 | xfs_iunlock( | |
242 | xfs_inode_t *ip, | |
243 | uint lock_flags) | |
244 | { | |
245 | /* | |
246 | * You can't set both SHARED and EXCL for the same lock, | |
247 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
248 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
249 | */ | |
250 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
251 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
252 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != | |
253 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
254 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); | |
255 | ASSERT(lock_flags != 0); | |
256 | ||
257 | if (lock_flags & XFS_IOLOCK_EXCL) | |
258 | mrunlock_excl(&ip->i_iolock); | |
259 | else if (lock_flags & XFS_IOLOCK_SHARED) | |
260 | mrunlock_shared(&ip->i_iolock); | |
261 | ||
262 | if (lock_flags & XFS_ILOCK_EXCL) | |
263 | mrunlock_excl(&ip->i_lock); | |
264 | else if (lock_flags & XFS_ILOCK_SHARED) | |
265 | mrunlock_shared(&ip->i_lock); | |
266 | ||
267 | trace_xfs_iunlock(ip, lock_flags, _RET_IP_); | |
268 | } | |
269 | ||
270 | /* | |
271 | * give up write locks. the i/o lock cannot be held nested | |
272 | * if it is being demoted. | |
273 | */ | |
274 | void | |
275 | xfs_ilock_demote( | |
276 | xfs_inode_t *ip, | |
277 | uint lock_flags) | |
278 | { | |
279 | ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)); | |
280 | ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); | |
281 | ||
282 | if (lock_flags & XFS_ILOCK_EXCL) | |
283 | mrdemote(&ip->i_lock); | |
284 | if (lock_flags & XFS_IOLOCK_EXCL) | |
285 | mrdemote(&ip->i_iolock); | |
286 | ||
287 | trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_); | |
288 | } | |
289 | ||
742ae1e3 | 290 | #if defined(DEBUG) || defined(XFS_WARN) |
fa96acad DC |
291 | int |
292 | xfs_isilocked( | |
293 | xfs_inode_t *ip, | |
294 | uint lock_flags) | |
295 | { | |
296 | if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { | |
297 | if (!(lock_flags & XFS_ILOCK_SHARED)) | |
298 | return !!ip->i_lock.mr_writer; | |
299 | return rwsem_is_locked(&ip->i_lock.mr_lock); | |
300 | } | |
301 | ||
302 | if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { | |
303 | if (!(lock_flags & XFS_IOLOCK_SHARED)) | |
304 | return !!ip->i_iolock.mr_writer; | |
305 | return rwsem_is_locked(&ip->i_iolock.mr_lock); | |
306 | } | |
307 | ||
308 | ASSERT(0); | |
309 | return 0; | |
310 | } | |
311 | #endif | |
312 | ||
313 | void | |
314 | __xfs_iflock( | |
315 | struct xfs_inode *ip) | |
316 | { | |
317 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT); | |
318 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT); | |
319 | ||
320 | do { | |
321 | prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
322 | if (xfs_isiflocked(ip)) | |
323 | io_schedule(); | |
324 | } while (!xfs_iflock_nowait(ip)); | |
325 | ||
326 | finish_wait(wq, &wait.wait); | |
327 | } | |
328 | ||
1da177e4 LT |
329 | #ifdef DEBUG |
330 | /* | |
331 | * Make sure that the extents in the given memory buffer | |
332 | * are valid. | |
333 | */ | |
334 | STATIC void | |
335 | xfs_validate_extents( | |
4eea22f0 | 336 | xfs_ifork_t *ifp, |
1da177e4 | 337 | int nrecs, |
1da177e4 LT |
338 | xfs_exntfmt_t fmt) |
339 | { | |
340 | xfs_bmbt_irec_t irec; | |
a6f64d4a | 341 | xfs_bmbt_rec_host_t rec; |
1da177e4 LT |
342 | int i; |
343 | ||
344 | for (i = 0; i < nrecs; i++) { | |
a6f64d4a CH |
345 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
346 | rec.l0 = get_unaligned(&ep->l0); | |
347 | rec.l1 = get_unaligned(&ep->l1); | |
348 | xfs_bmbt_get_all(&rec, &irec); | |
1da177e4 LT |
349 | if (fmt == XFS_EXTFMT_NOSTATE) |
350 | ASSERT(irec.br_state == XFS_EXT_NORM); | |
1da177e4 LT |
351 | } |
352 | } | |
353 | #else /* DEBUG */ | |
a6f64d4a | 354 | #define xfs_validate_extents(ifp, nrecs, fmt) |
1da177e4 LT |
355 | #endif /* DEBUG */ |
356 | ||
357 | /* | |
358 | * Check that none of the inode's in the buffer have a next | |
359 | * unlinked field of 0. | |
360 | */ | |
361 | #if defined(DEBUG) | |
362 | void | |
363 | xfs_inobp_check( | |
364 | xfs_mount_t *mp, | |
365 | xfs_buf_t *bp) | |
366 | { | |
367 | int i; | |
368 | int j; | |
369 | xfs_dinode_t *dip; | |
370 | ||
371 | j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; | |
372 | ||
373 | for (i = 0; i < j; i++) { | |
374 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, | |
375 | i * mp->m_sb.sb_inodesize); | |
376 | if (!dip->di_next_unlinked) { | |
53487786 DC |
377 | xfs_alert(mp, |
378 | "Detected bogus zero next_unlinked field in incore inode buffer 0x%p.", | |
1da177e4 LT |
379 | bp); |
380 | ASSERT(dip->di_next_unlinked); | |
381 | } | |
382 | } | |
383 | } | |
384 | #endif | |
385 | ||
612cfbfe | 386 | static void |
af133e86 DC |
387 | xfs_inode_buf_verify( |
388 | struct xfs_buf *bp) | |
389 | { | |
390 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
391 | int i; | |
392 | int ni; | |
393 | ||
394 | /* | |
395 | * Validate the magic number and version of every inode in the buffer | |
396 | */ | |
397 | ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock; | |
398 | for (i = 0; i < ni; i++) { | |
399 | int di_ok; | |
400 | xfs_dinode_t *dip; | |
401 | ||
402 | dip = (struct xfs_dinode *)xfs_buf_offset(bp, | |
403 | (i << mp->m_sb.sb_inodelog)); | |
404 | di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) && | |
405 | XFS_DINODE_GOOD_VERSION(dip->di_version); | |
406 | if (unlikely(XFS_TEST_ERROR(!di_ok, mp, | |
407 | XFS_ERRTAG_ITOBP_INOTOBP, | |
408 | XFS_RANDOM_ITOBP_INOTOBP))) { | |
409 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
410 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH, | |
411 | mp, dip); | |
412 | #ifdef DEBUG | |
413 | xfs_emerg(mp, | |
414 | "bad inode magic/vsn daddr %lld #%d (magic=%x)", | |
415 | (unsigned long long)bp->b_bn, i, | |
416 | be16_to_cpu(dip->di_magic)); | |
417 | ASSERT(0); | |
418 | #endif | |
419 | } | |
420 | } | |
421 | xfs_inobp_check(mp, bp); | |
612cfbfe DC |
422 | } |
423 | ||
1813dd64 DC |
424 | |
425 | static void | |
426 | xfs_inode_buf_read_verify( | |
612cfbfe DC |
427 | struct xfs_buf *bp) |
428 | { | |
429 | xfs_inode_buf_verify(bp); | |
430 | } | |
431 | ||
1813dd64 DC |
432 | static void |
433 | xfs_inode_buf_write_verify( | |
612cfbfe DC |
434 | struct xfs_buf *bp) |
435 | { | |
436 | xfs_inode_buf_verify(bp); | |
af133e86 DC |
437 | } |
438 | ||
1813dd64 DC |
439 | const struct xfs_buf_ops xfs_inode_buf_ops = { |
440 | .verify_read = xfs_inode_buf_read_verify, | |
441 | .verify_write = xfs_inode_buf_write_verify, | |
442 | }; | |
443 | ||
444 | ||
4ae29b43 | 445 | /* |
475ee413 CH |
446 | * This routine is called to map an inode to the buffer containing the on-disk |
447 | * version of the inode. It returns a pointer to the buffer containing the | |
448 | * on-disk inode in the bpp parameter, and in the dipp parameter it returns a | |
449 | * pointer to the on-disk inode within that buffer. | |
450 | * | |
451 | * If a non-zero error is returned, then the contents of bpp and dipp are | |
452 | * undefined. | |
4ae29b43 | 453 | */ |
475ee413 | 454 | int |
4ae29b43 | 455 | xfs_imap_to_bp( |
475ee413 CH |
456 | struct xfs_mount *mp, |
457 | struct xfs_trans *tp, | |
458 | struct xfs_imap *imap, | |
af133e86 | 459 | struct xfs_dinode **dipp, |
475ee413 CH |
460 | struct xfs_buf **bpp, |
461 | uint buf_flags, | |
462 | uint iget_flags) | |
4ae29b43 | 463 | { |
475ee413 CH |
464 | struct xfs_buf *bp; |
465 | int error; | |
4ae29b43 | 466 | |
611c9946 | 467 | buf_flags |= XBF_UNMAPPED; |
4ae29b43 | 468 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, |
af133e86 | 469 | (int)imap->im_len, buf_flags, &bp, |
1813dd64 | 470 | &xfs_inode_buf_ops); |
4ae29b43 | 471 | if (error) { |
af133e86 | 472 | if (error == EAGAIN) { |
0cadda1c | 473 | ASSERT(buf_flags & XBF_TRYLOCK); |
af133e86 | 474 | return error; |
a3f74ffb | 475 | } |
4ae29b43 | 476 | |
af133e86 DC |
477 | if (error == EFSCORRUPTED && |
478 | (iget_flags & XFS_IGET_UNTRUSTED)) | |
479 | return XFS_ERROR(EINVAL); | |
4ae29b43 | 480 | |
af133e86 DC |
481 | xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.", |
482 | __func__, error); | |
483 | return error; | |
4ae29b43 DC |
484 | } |
485 | ||
4ae29b43 | 486 | *bpp = bp; |
475ee413 | 487 | *dipp = (struct xfs_dinode *)xfs_buf_offset(bp, imap->im_boffset); |
4ae29b43 DC |
488 | return 0; |
489 | } | |
490 | ||
1da177e4 LT |
491 | /* |
492 | * Move inode type and inode format specific information from the | |
493 | * on-disk inode to the in-core inode. For fifos, devs, and sockets | |
494 | * this means set if_rdev to the proper value. For files, directories, | |
495 | * and symlinks this means to bring in the in-line data or extent | |
496 | * pointers. For a file in B-tree format, only the root is immediately | |
497 | * brought in-core. The rest will be in-lined in if_extents when it | |
498 | * is first referenced (see xfs_iread_extents()). | |
499 | */ | |
500 | STATIC int | |
501 | xfs_iformat( | |
502 | xfs_inode_t *ip, | |
503 | xfs_dinode_t *dip) | |
504 | { | |
505 | xfs_attr_shortform_t *atp; | |
506 | int size; | |
8096b1eb | 507 | int error = 0; |
1da177e4 | 508 | xfs_fsize_t di_size; |
1da177e4 | 509 | |
81591fe2 CH |
510 | if (unlikely(be32_to_cpu(dip->di_nextents) + |
511 | be16_to_cpu(dip->di_anextents) > | |
512 | be64_to_cpu(dip->di_nblocks))) { | |
65333b4c | 513 | xfs_warn(ip->i_mount, |
3762ec6b | 514 | "corrupt dinode %Lu, extent total = %d, nblocks = %Lu.", |
1da177e4 | 515 | (unsigned long long)ip->i_ino, |
81591fe2 CH |
516 | (int)(be32_to_cpu(dip->di_nextents) + |
517 | be16_to_cpu(dip->di_anextents)), | |
1da177e4 | 518 | (unsigned long long) |
81591fe2 | 519 | be64_to_cpu(dip->di_nblocks)); |
1da177e4 LT |
520 | XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW, |
521 | ip->i_mount, dip); | |
522 | return XFS_ERROR(EFSCORRUPTED); | |
523 | } | |
524 | ||
81591fe2 | 525 | if (unlikely(dip->di_forkoff > ip->i_mount->m_sb.sb_inodesize)) { |
65333b4c | 526 | xfs_warn(ip->i_mount, "corrupt dinode %Lu, forkoff = 0x%x.", |
1da177e4 | 527 | (unsigned long long)ip->i_ino, |
81591fe2 | 528 | dip->di_forkoff); |
1da177e4 LT |
529 | XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW, |
530 | ip->i_mount, dip); | |
531 | return XFS_ERROR(EFSCORRUPTED); | |
532 | } | |
533 | ||
b89d4208 CH |
534 | if (unlikely((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) && |
535 | !ip->i_mount->m_rtdev_targp)) { | |
65333b4c | 536 | xfs_warn(ip->i_mount, |
b89d4208 CH |
537 | "corrupt dinode %Lu, has realtime flag set.", |
538 | ip->i_ino); | |
539 | XFS_CORRUPTION_ERROR("xfs_iformat(realtime)", | |
540 | XFS_ERRLEVEL_LOW, ip->i_mount, dip); | |
541 | return XFS_ERROR(EFSCORRUPTED); | |
542 | } | |
543 | ||
1da177e4 LT |
544 | switch (ip->i_d.di_mode & S_IFMT) { |
545 | case S_IFIFO: | |
546 | case S_IFCHR: | |
547 | case S_IFBLK: | |
548 | case S_IFSOCK: | |
81591fe2 | 549 | if (unlikely(dip->di_format != XFS_DINODE_FMT_DEV)) { |
1da177e4 LT |
550 | XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW, |
551 | ip->i_mount, dip); | |
552 | return XFS_ERROR(EFSCORRUPTED); | |
553 | } | |
554 | ip->i_d.di_size = 0; | |
81591fe2 | 555 | ip->i_df.if_u2.if_rdev = xfs_dinode_get_rdev(dip); |
1da177e4 LT |
556 | break; |
557 | ||
558 | case S_IFREG: | |
559 | case S_IFLNK: | |
560 | case S_IFDIR: | |
81591fe2 | 561 | switch (dip->di_format) { |
1da177e4 LT |
562 | case XFS_DINODE_FMT_LOCAL: |
563 | /* | |
564 | * no local regular files yet | |
565 | */ | |
abbede1b | 566 | if (unlikely(S_ISREG(be16_to_cpu(dip->di_mode)))) { |
65333b4c DC |
567 | xfs_warn(ip->i_mount, |
568 | "corrupt inode %Lu (local format for regular file).", | |
1da177e4 LT |
569 | (unsigned long long) ip->i_ino); |
570 | XFS_CORRUPTION_ERROR("xfs_iformat(4)", | |
571 | XFS_ERRLEVEL_LOW, | |
572 | ip->i_mount, dip); | |
573 | return XFS_ERROR(EFSCORRUPTED); | |
574 | } | |
575 | ||
81591fe2 | 576 | di_size = be64_to_cpu(dip->di_size); |
1da177e4 | 577 | if (unlikely(di_size > XFS_DFORK_DSIZE(dip, ip->i_mount))) { |
65333b4c DC |
578 | xfs_warn(ip->i_mount, |
579 | "corrupt inode %Lu (bad size %Ld for local inode).", | |
1da177e4 LT |
580 | (unsigned long long) ip->i_ino, |
581 | (long long) di_size); | |
582 | XFS_CORRUPTION_ERROR("xfs_iformat(5)", | |
583 | XFS_ERRLEVEL_LOW, | |
584 | ip->i_mount, dip); | |
585 | return XFS_ERROR(EFSCORRUPTED); | |
586 | } | |
587 | ||
588 | size = (int)di_size; | |
589 | error = xfs_iformat_local(ip, dip, XFS_DATA_FORK, size); | |
590 | break; | |
591 | case XFS_DINODE_FMT_EXTENTS: | |
592 | error = xfs_iformat_extents(ip, dip, XFS_DATA_FORK); | |
593 | break; | |
594 | case XFS_DINODE_FMT_BTREE: | |
595 | error = xfs_iformat_btree(ip, dip, XFS_DATA_FORK); | |
596 | break; | |
597 | default: | |
598 | XFS_ERROR_REPORT("xfs_iformat(6)", XFS_ERRLEVEL_LOW, | |
599 | ip->i_mount); | |
600 | return XFS_ERROR(EFSCORRUPTED); | |
601 | } | |
602 | break; | |
603 | ||
604 | default: | |
605 | XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW, ip->i_mount); | |
606 | return XFS_ERROR(EFSCORRUPTED); | |
607 | } | |
608 | if (error) { | |
609 | return error; | |
610 | } | |
611 | if (!XFS_DFORK_Q(dip)) | |
612 | return 0; | |
8096b1eb | 613 | |
1da177e4 | 614 | ASSERT(ip->i_afp == NULL); |
4a7edddc | 615 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP | KM_NOFS); |
8096b1eb | 616 | |
81591fe2 | 617 | switch (dip->di_aformat) { |
1da177e4 LT |
618 | case XFS_DINODE_FMT_LOCAL: |
619 | atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip); | |
3b244aa8 | 620 | size = be16_to_cpu(atp->hdr.totsize); |
2809f76a CH |
621 | |
622 | if (unlikely(size < sizeof(struct xfs_attr_sf_hdr))) { | |
65333b4c DC |
623 | xfs_warn(ip->i_mount, |
624 | "corrupt inode %Lu (bad attr fork size %Ld).", | |
2809f76a CH |
625 | (unsigned long long) ip->i_ino, |
626 | (long long) size); | |
627 | XFS_CORRUPTION_ERROR("xfs_iformat(8)", | |
628 | XFS_ERRLEVEL_LOW, | |
629 | ip->i_mount, dip); | |
630 | return XFS_ERROR(EFSCORRUPTED); | |
631 | } | |
632 | ||
1da177e4 LT |
633 | error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size); |
634 | break; | |
635 | case XFS_DINODE_FMT_EXTENTS: | |
636 | error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK); | |
637 | break; | |
638 | case XFS_DINODE_FMT_BTREE: | |
639 | error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK); | |
640 | break; | |
641 | default: | |
642 | error = XFS_ERROR(EFSCORRUPTED); | |
643 | break; | |
644 | } | |
645 | if (error) { | |
646 | kmem_zone_free(xfs_ifork_zone, ip->i_afp); | |
647 | ip->i_afp = NULL; | |
648 | xfs_idestroy_fork(ip, XFS_DATA_FORK); | |
649 | } | |
650 | return error; | |
651 | } | |
652 | ||
653 | /* | |
654 | * The file is in-lined in the on-disk inode. | |
655 | * If it fits into if_inline_data, then copy | |
656 | * it there, otherwise allocate a buffer for it | |
657 | * and copy the data there. Either way, set | |
658 | * if_data to point at the data. | |
659 | * If we allocate a buffer for the data, make | |
660 | * sure that its size is a multiple of 4 and | |
661 | * record the real size in i_real_bytes. | |
662 | */ | |
663 | STATIC int | |
664 | xfs_iformat_local( | |
665 | xfs_inode_t *ip, | |
666 | xfs_dinode_t *dip, | |
667 | int whichfork, | |
668 | int size) | |
669 | { | |
670 | xfs_ifork_t *ifp; | |
671 | int real_size; | |
672 | ||
673 | /* | |
674 | * If the size is unreasonable, then something | |
675 | * is wrong and we just bail out rather than crash in | |
676 | * kmem_alloc() or memcpy() below. | |
677 | */ | |
678 | if (unlikely(size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) { | |
65333b4c DC |
679 | xfs_warn(ip->i_mount, |
680 | "corrupt inode %Lu (bad size %d for local fork, size = %d).", | |
1da177e4 LT |
681 | (unsigned long long) ip->i_ino, size, |
682 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork)); | |
683 | XFS_CORRUPTION_ERROR("xfs_iformat_local", XFS_ERRLEVEL_LOW, | |
684 | ip->i_mount, dip); | |
685 | return XFS_ERROR(EFSCORRUPTED); | |
686 | } | |
687 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
688 | real_size = 0; | |
689 | if (size == 0) | |
690 | ifp->if_u1.if_data = NULL; | |
691 | else if (size <= sizeof(ifp->if_u2.if_inline_data)) | |
692 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; | |
693 | else { | |
694 | real_size = roundup(size, 4); | |
4a7edddc | 695 | ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP | KM_NOFS); |
1da177e4 LT |
696 | } |
697 | ifp->if_bytes = size; | |
698 | ifp->if_real_bytes = real_size; | |
699 | if (size) | |
700 | memcpy(ifp->if_u1.if_data, XFS_DFORK_PTR(dip, whichfork), size); | |
701 | ifp->if_flags &= ~XFS_IFEXTENTS; | |
702 | ifp->if_flags |= XFS_IFINLINE; | |
703 | return 0; | |
704 | } | |
705 | ||
706 | /* | |
707 | * The file consists of a set of extents all | |
708 | * of which fit into the on-disk inode. | |
709 | * If there are few enough extents to fit into | |
710 | * the if_inline_ext, then copy them there. | |
711 | * Otherwise allocate a buffer for them and copy | |
712 | * them into it. Either way, set if_extents | |
713 | * to point at the extents. | |
714 | */ | |
715 | STATIC int | |
716 | xfs_iformat_extents( | |
717 | xfs_inode_t *ip, | |
718 | xfs_dinode_t *dip, | |
719 | int whichfork) | |
720 | { | |
a6f64d4a | 721 | xfs_bmbt_rec_t *dp; |
1da177e4 LT |
722 | xfs_ifork_t *ifp; |
723 | int nex; | |
1da177e4 LT |
724 | int size; |
725 | int i; | |
726 | ||
727 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
728 | nex = XFS_DFORK_NEXTENTS(dip, whichfork); | |
729 | size = nex * (uint)sizeof(xfs_bmbt_rec_t); | |
730 | ||
731 | /* | |
732 | * If the number of extents is unreasonable, then something | |
733 | * is wrong and we just bail out rather than crash in | |
734 | * kmem_alloc() or memcpy() below. | |
735 | */ | |
736 | if (unlikely(size < 0 || size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) { | |
65333b4c | 737 | xfs_warn(ip->i_mount, "corrupt inode %Lu ((a)extents = %d).", |
1da177e4 LT |
738 | (unsigned long long) ip->i_ino, nex); |
739 | XFS_CORRUPTION_ERROR("xfs_iformat_extents(1)", XFS_ERRLEVEL_LOW, | |
740 | ip->i_mount, dip); | |
741 | return XFS_ERROR(EFSCORRUPTED); | |
742 | } | |
743 | ||
4eea22f0 | 744 | ifp->if_real_bytes = 0; |
1da177e4 LT |
745 | if (nex == 0) |
746 | ifp->if_u1.if_extents = NULL; | |
747 | else if (nex <= XFS_INLINE_EXTS) | |
748 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; | |
4eea22f0 MK |
749 | else |
750 | xfs_iext_add(ifp, 0, nex); | |
751 | ||
1da177e4 | 752 | ifp->if_bytes = size; |
1da177e4 LT |
753 | if (size) { |
754 | dp = (xfs_bmbt_rec_t *) XFS_DFORK_PTR(dip, whichfork); | |
a6f64d4a | 755 | xfs_validate_extents(ifp, nex, XFS_EXTFMT_INODE(ip)); |
4eea22f0 | 756 | for (i = 0; i < nex; i++, dp++) { |
a6f64d4a | 757 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
597bca63 HH |
758 | ep->l0 = get_unaligned_be64(&dp->l0); |
759 | ep->l1 = get_unaligned_be64(&dp->l1); | |
1da177e4 | 760 | } |
3a59c94c | 761 | XFS_BMAP_TRACE_EXLIST(ip, nex, whichfork); |
1da177e4 LT |
762 | if (whichfork != XFS_DATA_FORK || |
763 | XFS_EXTFMT_INODE(ip) == XFS_EXTFMT_NOSTATE) | |
764 | if (unlikely(xfs_check_nostate_extents( | |
4eea22f0 | 765 | ifp, 0, nex))) { |
1da177e4 LT |
766 | XFS_ERROR_REPORT("xfs_iformat_extents(2)", |
767 | XFS_ERRLEVEL_LOW, | |
768 | ip->i_mount); | |
769 | return XFS_ERROR(EFSCORRUPTED); | |
770 | } | |
771 | } | |
772 | ifp->if_flags |= XFS_IFEXTENTS; | |
773 | return 0; | |
774 | } | |
775 | ||
776 | /* | |
777 | * The file has too many extents to fit into | |
778 | * the inode, so they are in B-tree format. | |
779 | * Allocate a buffer for the root of the B-tree | |
780 | * and copy the root into it. The i_extents | |
781 | * field will remain NULL until all of the | |
782 | * extents are read in (when they are needed). | |
783 | */ | |
784 | STATIC int | |
785 | xfs_iformat_btree( | |
786 | xfs_inode_t *ip, | |
787 | xfs_dinode_t *dip, | |
788 | int whichfork) | |
789 | { | |
ee1a47ab | 790 | struct xfs_mount *mp = ip->i_mount; |
1da177e4 LT |
791 | xfs_bmdr_block_t *dfp; |
792 | xfs_ifork_t *ifp; | |
793 | /* REFERENCED */ | |
794 | int nrecs; | |
795 | int size; | |
796 | ||
797 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
798 | dfp = (xfs_bmdr_block_t *)XFS_DFORK_PTR(dip, whichfork); | |
ee1a47ab | 799 | size = XFS_BMAP_BROOT_SPACE(mp, dfp); |
60197e8d | 800 | nrecs = be16_to_cpu(dfp->bb_numrecs); |
1da177e4 LT |
801 | |
802 | /* | |
803 | * blow out if -- fork has less extents than can fit in | |
804 | * fork (fork shouldn't be a btree format), root btree | |
805 | * block has more records than can fit into the fork, | |
806 | * or the number of extents is greater than the number of | |
807 | * blocks. | |
808 | */ | |
8096b1eb | 809 | if (unlikely(XFS_IFORK_NEXTENTS(ip, whichfork) <= |
ee1a47ab | 810 | XFS_IFORK_MAXEXT(ip, whichfork) || |
8096b1eb | 811 | XFS_BMDR_SPACE_CALC(nrecs) > |
ee1a47ab | 812 | XFS_DFORK_SIZE(dip, mp, whichfork) || |
8096b1eb | 813 | XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks)) { |
ee1a47ab CH |
814 | xfs_warn(mp, "corrupt inode %Lu (btree).", |
815 | (unsigned long long) ip->i_ino); | |
65333b4c | 816 | XFS_CORRUPTION_ERROR("xfs_iformat_btree", XFS_ERRLEVEL_LOW, |
ee1a47ab | 817 | mp, dip); |
1da177e4 LT |
818 | return XFS_ERROR(EFSCORRUPTED); |
819 | } | |
820 | ||
821 | ifp->if_broot_bytes = size; | |
4a7edddc | 822 | ifp->if_broot = kmem_alloc(size, KM_SLEEP | KM_NOFS); |
1da177e4 LT |
823 | ASSERT(ifp->if_broot != NULL); |
824 | /* | |
825 | * Copy and convert from the on-disk structure | |
826 | * to the in-memory structure. | |
827 | */ | |
ee1a47ab | 828 | xfs_bmdr_to_bmbt(ip, dfp, XFS_DFORK_SIZE(dip, ip->i_mount, whichfork), |
60197e8d | 829 | ifp->if_broot, size); |
1da177e4 LT |
830 | ifp->if_flags &= ~XFS_IFEXTENTS; |
831 | ifp->if_flags |= XFS_IFBROOT; | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
d96f8f89 | 836 | STATIC void |
347d1c01 CH |
837 | xfs_dinode_from_disk( |
838 | xfs_icdinode_t *to, | |
81591fe2 | 839 | xfs_dinode_t *from) |
1da177e4 | 840 | { |
347d1c01 CH |
841 | to->di_magic = be16_to_cpu(from->di_magic); |
842 | to->di_mode = be16_to_cpu(from->di_mode); | |
843 | to->di_version = from ->di_version; | |
844 | to->di_format = from->di_format; | |
845 | to->di_onlink = be16_to_cpu(from->di_onlink); | |
846 | to->di_uid = be32_to_cpu(from->di_uid); | |
847 | to->di_gid = be32_to_cpu(from->di_gid); | |
848 | to->di_nlink = be32_to_cpu(from->di_nlink); | |
6743099c AM |
849 | to->di_projid_lo = be16_to_cpu(from->di_projid_lo); |
850 | to->di_projid_hi = be16_to_cpu(from->di_projid_hi); | |
347d1c01 CH |
851 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
852 | to->di_flushiter = be16_to_cpu(from->di_flushiter); | |
853 | to->di_atime.t_sec = be32_to_cpu(from->di_atime.t_sec); | |
854 | to->di_atime.t_nsec = be32_to_cpu(from->di_atime.t_nsec); | |
855 | to->di_mtime.t_sec = be32_to_cpu(from->di_mtime.t_sec); | |
856 | to->di_mtime.t_nsec = be32_to_cpu(from->di_mtime.t_nsec); | |
857 | to->di_ctime.t_sec = be32_to_cpu(from->di_ctime.t_sec); | |
858 | to->di_ctime.t_nsec = be32_to_cpu(from->di_ctime.t_nsec); | |
859 | to->di_size = be64_to_cpu(from->di_size); | |
860 | to->di_nblocks = be64_to_cpu(from->di_nblocks); | |
861 | to->di_extsize = be32_to_cpu(from->di_extsize); | |
862 | to->di_nextents = be32_to_cpu(from->di_nextents); | |
863 | to->di_anextents = be16_to_cpu(from->di_anextents); | |
864 | to->di_forkoff = from->di_forkoff; | |
865 | to->di_aformat = from->di_aformat; | |
866 | to->di_dmevmask = be32_to_cpu(from->di_dmevmask); | |
867 | to->di_dmstate = be16_to_cpu(from->di_dmstate); | |
868 | to->di_flags = be16_to_cpu(from->di_flags); | |
869 | to->di_gen = be32_to_cpu(from->di_gen); | |
93848a99 CH |
870 | |
871 | if (to->di_version == 3) { | |
872 | to->di_changecount = be64_to_cpu(from->di_changecount); | |
873 | to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec); | |
874 | to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec); | |
875 | to->di_flags2 = be64_to_cpu(from->di_flags2); | |
876 | to->di_ino = be64_to_cpu(from->di_ino); | |
877 | to->di_lsn = be64_to_cpu(from->di_lsn); | |
878 | memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2)); | |
879 | uuid_copy(&to->di_uuid, &from->di_uuid); | |
880 | } | |
347d1c01 CH |
881 | } |
882 | ||
883 | void | |
884 | xfs_dinode_to_disk( | |
81591fe2 | 885 | xfs_dinode_t *to, |
347d1c01 CH |
886 | xfs_icdinode_t *from) |
887 | { | |
888 | to->di_magic = cpu_to_be16(from->di_magic); | |
889 | to->di_mode = cpu_to_be16(from->di_mode); | |
890 | to->di_version = from ->di_version; | |
891 | to->di_format = from->di_format; | |
892 | to->di_onlink = cpu_to_be16(from->di_onlink); | |
893 | to->di_uid = cpu_to_be32(from->di_uid); | |
894 | to->di_gid = cpu_to_be32(from->di_gid); | |
895 | to->di_nlink = cpu_to_be32(from->di_nlink); | |
6743099c AM |
896 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); |
897 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
347d1c01 CH |
898 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
899 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
900 | to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); | |
901 | to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); | |
902 | to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); | |
903 | to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec); | |
904 | to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec); | |
905 | to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec); | |
906 | to->di_size = cpu_to_be64(from->di_size); | |
907 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
908 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
909 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
910 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
911 | to->di_forkoff = from->di_forkoff; | |
912 | to->di_aformat = from->di_aformat; | |
913 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
914 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
915 | to->di_flags = cpu_to_be16(from->di_flags); | |
916 | to->di_gen = cpu_to_be32(from->di_gen); | |
93848a99 CH |
917 | |
918 | if (from->di_version == 3) { | |
919 | to->di_changecount = cpu_to_be64(from->di_changecount); | |
920 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); | |
921 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
922 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
923 | to->di_ino = cpu_to_be64(from->di_ino); | |
924 | to->di_lsn = cpu_to_be64(from->di_lsn); | |
925 | memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2)); | |
926 | uuid_copy(&to->di_uuid, &from->di_uuid); | |
927 | } | |
1da177e4 LT |
928 | } |
929 | ||
930 | STATIC uint | |
931 | _xfs_dic2xflags( | |
1da177e4 LT |
932 | __uint16_t di_flags) |
933 | { | |
934 | uint flags = 0; | |
935 | ||
936 | if (di_flags & XFS_DIFLAG_ANY) { | |
937 | if (di_flags & XFS_DIFLAG_REALTIME) | |
938 | flags |= XFS_XFLAG_REALTIME; | |
939 | if (di_flags & XFS_DIFLAG_PREALLOC) | |
940 | flags |= XFS_XFLAG_PREALLOC; | |
941 | if (di_flags & XFS_DIFLAG_IMMUTABLE) | |
942 | flags |= XFS_XFLAG_IMMUTABLE; | |
943 | if (di_flags & XFS_DIFLAG_APPEND) | |
944 | flags |= XFS_XFLAG_APPEND; | |
945 | if (di_flags & XFS_DIFLAG_SYNC) | |
946 | flags |= XFS_XFLAG_SYNC; | |
947 | if (di_flags & XFS_DIFLAG_NOATIME) | |
948 | flags |= XFS_XFLAG_NOATIME; | |
949 | if (di_flags & XFS_DIFLAG_NODUMP) | |
950 | flags |= XFS_XFLAG_NODUMP; | |
951 | if (di_flags & XFS_DIFLAG_RTINHERIT) | |
952 | flags |= XFS_XFLAG_RTINHERIT; | |
953 | if (di_flags & XFS_DIFLAG_PROJINHERIT) | |
954 | flags |= XFS_XFLAG_PROJINHERIT; | |
955 | if (di_flags & XFS_DIFLAG_NOSYMLINKS) | |
956 | flags |= XFS_XFLAG_NOSYMLINKS; | |
dd9f438e NS |
957 | if (di_flags & XFS_DIFLAG_EXTSIZE) |
958 | flags |= XFS_XFLAG_EXTSIZE; | |
959 | if (di_flags & XFS_DIFLAG_EXTSZINHERIT) | |
960 | flags |= XFS_XFLAG_EXTSZINHERIT; | |
d3446eac BN |
961 | if (di_flags & XFS_DIFLAG_NODEFRAG) |
962 | flags |= XFS_XFLAG_NODEFRAG; | |
2a82b8be DC |
963 | if (di_flags & XFS_DIFLAG_FILESTREAM) |
964 | flags |= XFS_XFLAG_FILESTREAM; | |
1da177e4 LT |
965 | } |
966 | ||
967 | return flags; | |
968 | } | |
969 | ||
970 | uint | |
971 | xfs_ip2xflags( | |
972 | xfs_inode_t *ip) | |
973 | { | |
347d1c01 | 974 | xfs_icdinode_t *dic = &ip->i_d; |
1da177e4 | 975 | |
a916e2bd | 976 | return _xfs_dic2xflags(dic->di_flags) | |
45ba598e | 977 | (XFS_IFORK_Q(ip) ? XFS_XFLAG_HASATTR : 0); |
1da177e4 LT |
978 | } |
979 | ||
980 | uint | |
981 | xfs_dic2xflags( | |
45ba598e | 982 | xfs_dinode_t *dip) |
1da177e4 | 983 | { |
81591fe2 | 984 | return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) | |
45ba598e | 985 | (XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0); |
1da177e4 LT |
986 | } |
987 | ||
93848a99 CH |
988 | static bool |
989 | xfs_dinode_verify( | |
990 | struct xfs_mount *mp, | |
991 | struct xfs_inode *ip, | |
992 | struct xfs_dinode *dip) | |
993 | { | |
994 | if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC)) | |
995 | return false; | |
996 | ||
997 | /* only version 3 or greater inodes are extensively verified here */ | |
998 | if (dip->di_version < 3) | |
999 | return true; | |
1000 | ||
1001 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
1002 | return false; | |
1003 | if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize, | |
1004 | offsetof(struct xfs_dinode, di_crc))) | |
1005 | return false; | |
1006 | if (be64_to_cpu(dip->di_ino) != ip->i_ino) | |
1007 | return false; | |
1008 | if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_uuid)) | |
1009 | return false; | |
1010 | return true; | |
1011 | } | |
1012 | ||
1013 | void | |
1014 | xfs_dinode_calc_crc( | |
1015 | struct xfs_mount *mp, | |
1016 | struct xfs_dinode *dip) | |
1017 | { | |
1018 | __uint32_t crc; | |
1019 | ||
1020 | if (dip->di_version < 3) | |
1021 | return; | |
1022 | ||
1023 | ASSERT(xfs_sb_version_hascrc(&mp->m_sb)); | |
1024 | crc = xfs_start_cksum((char *)dip, mp->m_sb.sb_inodesize, | |
1025 | offsetof(struct xfs_dinode, di_crc)); | |
1026 | dip->di_crc = xfs_end_cksum(crc); | |
1027 | } | |
1028 | ||
07c8f675 | 1029 | /* |
24f211ba | 1030 | * Read the disk inode attributes into the in-core inode structure. |
1da177e4 LT |
1031 | */ |
1032 | int | |
1033 | xfs_iread( | |
1034 | xfs_mount_t *mp, | |
1035 | xfs_trans_t *tp, | |
24f211ba | 1036 | xfs_inode_t *ip, |
24f211ba | 1037 | uint iget_flags) |
1da177e4 LT |
1038 | { |
1039 | xfs_buf_t *bp; | |
1040 | xfs_dinode_t *dip; | |
1da177e4 LT |
1041 | int error; |
1042 | ||
1da177e4 | 1043 | /* |
92bfc6e7 | 1044 | * Fill in the location information in the in-core inode. |
1da177e4 | 1045 | */ |
24f211ba | 1046 | error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags); |
76d8b277 | 1047 | if (error) |
24f211ba | 1048 | return error; |
76d8b277 CH |
1049 | |
1050 | /* | |
92bfc6e7 | 1051 | * Get pointers to the on-disk inode and the buffer containing it. |
76d8b277 | 1052 | */ |
475ee413 | 1053 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags); |
9ed0451e | 1054 | if (error) |
24f211ba | 1055 | return error; |
1da177e4 | 1056 | |
93848a99 CH |
1057 | /* even unallocated inodes are verified */ |
1058 | if (!xfs_dinode_verify(mp, ip, dip)) { | |
1059 | xfs_alert(mp, "%s: validation failed for inode %lld failed", | |
1060 | __func__, ip->i_ino); | |
1061 | ||
1062 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, dip); | |
1063 | error = XFS_ERROR(EFSCORRUPTED); | |
9ed0451e | 1064 | goto out_brelse; |
1da177e4 LT |
1065 | } |
1066 | ||
1067 | /* | |
1068 | * If the on-disk inode is already linked to a directory | |
1069 | * entry, copy all of the inode into the in-core inode. | |
1070 | * xfs_iformat() handles copying in the inode format | |
1071 | * specific information. | |
1072 | * Otherwise, just get the truly permanent information. | |
1073 | */ | |
81591fe2 CH |
1074 | if (dip->di_mode) { |
1075 | xfs_dinode_from_disk(&ip->i_d, dip); | |
1da177e4 LT |
1076 | error = xfs_iformat(ip, dip); |
1077 | if (error) { | |
1da177e4 | 1078 | #ifdef DEBUG |
53487786 DC |
1079 | xfs_alert(mp, "%s: xfs_iformat() returned error %d", |
1080 | __func__, error); | |
1da177e4 | 1081 | #endif /* DEBUG */ |
9ed0451e | 1082 | goto out_brelse; |
1da177e4 LT |
1083 | } |
1084 | } else { | |
93848a99 CH |
1085 | /* |
1086 | * Partial initialisation of the in-core inode. Just the bits | |
1087 | * that xfs_ialloc won't overwrite or relies on being correct. | |
1088 | */ | |
81591fe2 CH |
1089 | ip->i_d.di_magic = be16_to_cpu(dip->di_magic); |
1090 | ip->i_d.di_version = dip->di_version; | |
1091 | ip->i_d.di_gen = be32_to_cpu(dip->di_gen); | |
1092 | ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter); | |
93848a99 CH |
1093 | |
1094 | if (dip->di_version == 3) { | |
1095 | ip->i_d.di_ino = be64_to_cpu(dip->di_ino); | |
1096 | uuid_copy(&ip->i_d.di_uuid, &dip->di_uuid); | |
1097 | } | |
1098 | ||
1da177e4 LT |
1099 | /* |
1100 | * Make sure to pull in the mode here as well in | |
1101 | * case the inode is released without being used. | |
1102 | * This ensures that xfs_inactive() will see that | |
1103 | * the inode is already free and not try to mess | |
1104 | * with the uninitialized part of it. | |
1105 | */ | |
1106 | ip->i_d.di_mode = 0; | |
1da177e4 LT |
1107 | } |
1108 | ||
1da177e4 LT |
1109 | /* |
1110 | * The inode format changed when we moved the link count and | |
1111 | * made it 32 bits long. If this is an old format inode, | |
1112 | * convert it in memory to look like a new one. If it gets | |
1113 | * flushed to disk we will convert back before flushing or | |
1114 | * logging it. We zero out the new projid field and the old link | |
1115 | * count field. We'll handle clearing the pad field (the remains | |
1116 | * of the old uuid field) when we actually convert the inode to | |
1117 | * the new format. We don't change the version number so that we | |
1118 | * can distinguish this from a real new format inode. | |
1119 | */ | |
51ce16d5 | 1120 | if (ip->i_d.di_version == 1) { |
1da177e4 LT |
1121 | ip->i_d.di_nlink = ip->i_d.di_onlink; |
1122 | ip->i_d.di_onlink = 0; | |
6743099c | 1123 | xfs_set_projid(ip, 0); |
1da177e4 LT |
1124 | } |
1125 | ||
1126 | ip->i_delayed_blks = 0; | |
1127 | ||
1128 | /* | |
1129 | * Mark the buffer containing the inode as something to keep | |
1130 | * around for a while. This helps to keep recently accessed | |
1131 | * meta-data in-core longer. | |
1132 | */ | |
821eb21d | 1133 | xfs_buf_set_ref(bp, XFS_INO_REF); |
1da177e4 LT |
1134 | |
1135 | /* | |
1136 | * Use xfs_trans_brelse() to release the buffer containing the | |
1137 | * on-disk inode, because it was acquired with xfs_trans_read_buf() | |
475ee413 | 1138 | * in xfs_imap_to_bp() above. If tp is NULL, this is just a normal |
1da177e4 LT |
1139 | * brelse(). If we're within a transaction, then xfs_trans_brelse() |
1140 | * will only release the buffer if it is not dirty within the | |
1141 | * transaction. It will be OK to release the buffer in this case, | |
1142 | * because inodes on disk are never destroyed and we will be | |
1143 | * locking the new in-core inode before putting it in the hash | |
1144 | * table where other processes can find it. Thus we don't have | |
1145 | * to worry about the inode being changed just because we released | |
1146 | * the buffer. | |
1147 | */ | |
9ed0451e CH |
1148 | out_brelse: |
1149 | xfs_trans_brelse(tp, bp); | |
9ed0451e | 1150 | return error; |
1da177e4 LT |
1151 | } |
1152 | ||
1153 | /* | |
1154 | * Read in extents from a btree-format inode. | |
1155 | * Allocate and fill in if_extents. Real work is done in xfs_bmap.c. | |
1156 | */ | |
1157 | int | |
1158 | xfs_iread_extents( | |
1159 | xfs_trans_t *tp, | |
1160 | xfs_inode_t *ip, | |
1161 | int whichfork) | |
1162 | { | |
1163 | int error; | |
1164 | xfs_ifork_t *ifp; | |
4eea22f0 | 1165 | xfs_extnum_t nextents; |
1da177e4 LT |
1166 | |
1167 | if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { | |
1168 | XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW, | |
1169 | ip->i_mount); | |
1170 | return XFS_ERROR(EFSCORRUPTED); | |
1171 | } | |
4eea22f0 | 1172 | nextents = XFS_IFORK_NEXTENTS(ip, whichfork); |
1da177e4 | 1173 | ifp = XFS_IFORK_PTR(ip, whichfork); |
4eea22f0 | 1174 | |
1da177e4 LT |
1175 | /* |
1176 | * We know that the size is valid (it's checked in iformat_btree) | |
1177 | */ | |
4eea22f0 | 1178 | ifp->if_bytes = ifp->if_real_bytes = 0; |
1da177e4 | 1179 | ifp->if_flags |= XFS_IFEXTENTS; |
4eea22f0 | 1180 | xfs_iext_add(ifp, 0, nextents); |
1da177e4 LT |
1181 | error = xfs_bmap_read_extents(tp, ip, whichfork); |
1182 | if (error) { | |
4eea22f0 | 1183 | xfs_iext_destroy(ifp); |
1da177e4 LT |
1184 | ifp->if_flags &= ~XFS_IFEXTENTS; |
1185 | return error; | |
1186 | } | |
a6f64d4a | 1187 | xfs_validate_extents(ifp, nextents, XFS_EXTFMT_INODE(ip)); |
1da177e4 LT |
1188 | return 0; |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Allocate an inode on disk and return a copy of its in-core version. | |
1193 | * The in-core inode is locked exclusively. Set mode, nlink, and rdev | |
1194 | * appropriately within the inode. The uid and gid for the inode are | |
1195 | * set according to the contents of the given cred structure. | |
1196 | * | |
1197 | * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() | |
cd856db6 CM |
1198 | * has a free inode available, call xfs_iget() to obtain the in-core |
1199 | * version of the allocated inode. Finally, fill in the inode and | |
1200 | * log its initial contents. In this case, ialloc_context would be | |
1201 | * set to NULL. | |
1da177e4 | 1202 | * |
cd856db6 CM |
1203 | * If xfs_dialloc() does not have an available inode, it will replenish |
1204 | * its supply by doing an allocation. Since we can only do one | |
1205 | * allocation within a transaction without deadlocks, we must commit | |
1206 | * the current transaction before returning the inode itself. | |
1207 | * In this case, therefore, we will set ialloc_context and return. | |
1da177e4 LT |
1208 | * The caller should then commit the current transaction, start a new |
1209 | * transaction, and call xfs_ialloc() again to actually get the inode. | |
1210 | * | |
1211 | * To ensure that some other process does not grab the inode that | |
1212 | * was allocated during the first call to xfs_ialloc(), this routine | |
1213 | * also returns the [locked] bp pointing to the head of the freelist | |
1214 | * as ialloc_context. The caller should hold this buffer across | |
1215 | * the commit and pass it back into this routine on the second call. | |
b11f94d5 DC |
1216 | * |
1217 | * If we are allocating quota inodes, we do not have a parent inode | |
1218 | * to attach to or associate with (i.e. pip == NULL) because they | |
1219 | * are not linked into the directory structure - they are attached | |
1220 | * directly to the superblock - and so have no parent. | |
1da177e4 LT |
1221 | */ |
1222 | int | |
1223 | xfs_ialloc( | |
1224 | xfs_trans_t *tp, | |
1225 | xfs_inode_t *pip, | |
576b1d67 | 1226 | umode_t mode, |
31b084ae | 1227 | xfs_nlink_t nlink, |
1da177e4 | 1228 | xfs_dev_t rdev, |
6743099c | 1229 | prid_t prid, |
1da177e4 LT |
1230 | int okalloc, |
1231 | xfs_buf_t **ialloc_context, | |
1da177e4 LT |
1232 | xfs_inode_t **ipp) |
1233 | { | |
93848a99 | 1234 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 LT |
1235 | xfs_ino_t ino; |
1236 | xfs_inode_t *ip; | |
1da177e4 LT |
1237 | uint flags; |
1238 | int error; | |
dff35fd4 | 1239 | timespec_t tv; |
bf904248 | 1240 | int filestreams = 0; |
1da177e4 LT |
1241 | |
1242 | /* | |
1243 | * Call the space management code to pick | |
1244 | * the on-disk inode to be allocated. | |
1245 | */ | |
b11f94d5 | 1246 | error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc, |
08358906 | 1247 | ialloc_context, &ino); |
bf904248 | 1248 | if (error) |
1da177e4 | 1249 | return error; |
08358906 | 1250 | if (*ialloc_context || ino == NULLFSINO) { |
1da177e4 LT |
1251 | *ipp = NULL; |
1252 | return 0; | |
1253 | } | |
1254 | ASSERT(*ialloc_context == NULL); | |
1255 | ||
1256 | /* | |
1257 | * Get the in-core inode with the lock held exclusively. | |
1258 | * This is because we're setting fields here we need | |
1259 | * to prevent others from looking at until we're done. | |
1260 | */ | |
93848a99 | 1261 | error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE, |
ec3ba85f | 1262 | XFS_ILOCK_EXCL, &ip); |
bf904248 | 1263 | if (error) |
1da177e4 | 1264 | return error; |
1da177e4 LT |
1265 | ASSERT(ip != NULL); |
1266 | ||
576b1d67 | 1267 | ip->i_d.di_mode = mode; |
1da177e4 LT |
1268 | ip->i_d.di_onlink = 0; |
1269 | ip->i_d.di_nlink = nlink; | |
1270 | ASSERT(ip->i_d.di_nlink == nlink); | |
9e2b2dc4 DH |
1271 | ip->i_d.di_uid = current_fsuid(); |
1272 | ip->i_d.di_gid = current_fsgid(); | |
6743099c | 1273 | xfs_set_projid(ip, prid); |
1da177e4 LT |
1274 | memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); |
1275 | ||
1276 | /* | |
1277 | * If the superblock version is up to where we support new format | |
1278 | * inodes and this is currently an old format inode, then change | |
1279 | * the inode version number now. This way we only do the conversion | |
1280 | * here rather than here and in the flush/logging code. | |
1281 | */ | |
93848a99 | 1282 | if (xfs_sb_version_hasnlink(&mp->m_sb) && |
51ce16d5 CH |
1283 | ip->i_d.di_version == 1) { |
1284 | ip->i_d.di_version = 2; | |
1da177e4 LT |
1285 | /* |
1286 | * We've already zeroed the old link count, the projid field, | |
1287 | * and the pad field. | |
1288 | */ | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * Project ids won't be stored on disk if we are using a version 1 inode. | |
1293 | */ | |
51ce16d5 | 1294 | if ((prid != 0) && (ip->i_d.di_version == 1)) |
1da177e4 LT |
1295 | xfs_bump_ino_vers2(tp, ip); |
1296 | ||
bd186aa9 | 1297 | if (pip && XFS_INHERIT_GID(pip)) { |
1da177e4 | 1298 | ip->i_d.di_gid = pip->i_d.di_gid; |
abbede1b | 1299 | if ((pip->i_d.di_mode & S_ISGID) && S_ISDIR(mode)) { |
1da177e4 LT |
1300 | ip->i_d.di_mode |= S_ISGID; |
1301 | } | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * If the group ID of the new file does not match the effective group | |
1306 | * ID or one of the supplementary group IDs, the S_ISGID bit is cleared | |
1307 | * (and only if the irix_sgid_inherit compatibility variable is set). | |
1308 | */ | |
1309 | if ((irix_sgid_inherit) && | |
1310 | (ip->i_d.di_mode & S_ISGID) && | |
1311 | (!in_group_p((gid_t)ip->i_d.di_gid))) { | |
1312 | ip->i_d.di_mode &= ~S_ISGID; | |
1313 | } | |
1314 | ||
1315 | ip->i_d.di_size = 0; | |
1316 | ip->i_d.di_nextents = 0; | |
1317 | ASSERT(ip->i_d.di_nblocks == 0); | |
dff35fd4 CH |
1318 | |
1319 | nanotime(&tv); | |
1320 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; | |
1321 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; | |
1322 | ip->i_d.di_atime = ip->i_d.di_mtime; | |
1323 | ip->i_d.di_ctime = ip->i_d.di_mtime; | |
1324 | ||
1da177e4 LT |
1325 | /* |
1326 | * di_gen will have been taken care of in xfs_iread. | |
1327 | */ | |
1328 | ip->i_d.di_extsize = 0; | |
1329 | ip->i_d.di_dmevmask = 0; | |
1330 | ip->i_d.di_dmstate = 0; | |
1331 | ip->i_d.di_flags = 0; | |
93848a99 CH |
1332 | |
1333 | if (ip->i_d.di_version == 3) { | |
1334 | ASSERT(ip->i_d.di_ino == ino); | |
1335 | ASSERT(uuid_equal(&ip->i_d.di_uuid, &mp->m_sb.sb_uuid)); | |
1336 | ip->i_d.di_crc = 0; | |
1337 | ip->i_d.di_changecount = 1; | |
1338 | ip->i_d.di_lsn = 0; | |
1339 | ip->i_d.di_flags2 = 0; | |
1340 | memset(&(ip->i_d.di_pad2[0]), 0, sizeof(ip->i_d.di_pad2)); | |
1341 | ip->i_d.di_crtime = ip->i_d.di_mtime; | |
1342 | } | |
1343 | ||
1344 | ||
1da177e4 LT |
1345 | flags = XFS_ILOG_CORE; |
1346 | switch (mode & S_IFMT) { | |
1347 | case S_IFIFO: | |
1348 | case S_IFCHR: | |
1349 | case S_IFBLK: | |
1350 | case S_IFSOCK: | |
1351 | ip->i_d.di_format = XFS_DINODE_FMT_DEV; | |
1352 | ip->i_df.if_u2.if_rdev = rdev; | |
1353 | ip->i_df.if_flags = 0; | |
1354 | flags |= XFS_ILOG_DEV; | |
1355 | break; | |
1356 | case S_IFREG: | |
bf904248 DC |
1357 | /* |
1358 | * we can't set up filestreams until after the VFS inode | |
1359 | * is set up properly. | |
1360 | */ | |
1361 | if (pip && xfs_inode_is_filestream(pip)) | |
1362 | filestreams = 1; | |
2a82b8be | 1363 | /* fall through */ |
1da177e4 | 1364 | case S_IFDIR: |
b11f94d5 | 1365 | if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) { |
365ca83d NS |
1366 | uint di_flags = 0; |
1367 | ||
abbede1b | 1368 | if (S_ISDIR(mode)) { |
365ca83d NS |
1369 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
1370 | di_flags |= XFS_DIFLAG_RTINHERIT; | |
dd9f438e NS |
1371 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
1372 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; | |
1373 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
1374 | } | |
abbede1b | 1375 | } else if (S_ISREG(mode)) { |
613d7043 | 1376 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
365ca83d | 1377 | di_flags |= XFS_DIFLAG_REALTIME; |
dd9f438e NS |
1378 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
1379 | di_flags |= XFS_DIFLAG_EXTSIZE; | |
1380 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
1381 | } | |
1da177e4 LT |
1382 | } |
1383 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) && | |
1384 | xfs_inherit_noatime) | |
365ca83d | 1385 | di_flags |= XFS_DIFLAG_NOATIME; |
1da177e4 LT |
1386 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) && |
1387 | xfs_inherit_nodump) | |
365ca83d | 1388 | di_flags |= XFS_DIFLAG_NODUMP; |
1da177e4 LT |
1389 | if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) && |
1390 | xfs_inherit_sync) | |
365ca83d | 1391 | di_flags |= XFS_DIFLAG_SYNC; |
1da177e4 LT |
1392 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) && |
1393 | xfs_inherit_nosymlinks) | |
365ca83d NS |
1394 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
1395 | if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) | |
1396 | di_flags |= XFS_DIFLAG_PROJINHERIT; | |
d3446eac BN |
1397 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) && |
1398 | xfs_inherit_nodefrag) | |
1399 | di_flags |= XFS_DIFLAG_NODEFRAG; | |
2a82b8be DC |
1400 | if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM) |
1401 | di_flags |= XFS_DIFLAG_FILESTREAM; | |
365ca83d | 1402 | ip->i_d.di_flags |= di_flags; |
1da177e4 LT |
1403 | } |
1404 | /* FALLTHROUGH */ | |
1405 | case S_IFLNK: | |
1406 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; | |
1407 | ip->i_df.if_flags = XFS_IFEXTENTS; | |
1408 | ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0; | |
1409 | ip->i_df.if_u1.if_extents = NULL; | |
1410 | break; | |
1411 | default: | |
1412 | ASSERT(0); | |
1413 | } | |
1414 | /* | |
1415 | * Attribute fork settings for new inode. | |
1416 | */ | |
1417 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
1418 | ip->i_d.di_anextents = 0; | |
1419 | ||
1420 | /* | |
1421 | * Log the new values stuffed into the inode. | |
1422 | */ | |
ddc3415a | 1423 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
1424 | xfs_trans_log_inode(tp, ip, flags); |
1425 | ||
b83bd138 | 1426 | /* now that we have an i_mode we can setup inode ops and unlock */ |
41be8bed | 1427 | xfs_setup_inode(ip); |
1da177e4 | 1428 | |
bf904248 DC |
1429 | /* now we have set up the vfs inode we can associate the filestream */ |
1430 | if (filestreams) { | |
1431 | error = xfs_filestream_associate(pip, ip); | |
1432 | if (error < 0) | |
1433 | return -error; | |
1434 | if (!error) | |
1435 | xfs_iflags_set(ip, XFS_IFILESTREAM); | |
1436 | } | |
1437 | ||
1da177e4 LT |
1438 | *ipp = ip; |
1439 | return 0; | |
1440 | } | |
1441 | ||
1da177e4 | 1442 | /* |
8f04c47a CH |
1443 | * Free up the underlying blocks past new_size. The new size must be smaller |
1444 | * than the current size. This routine can be used both for the attribute and | |
1445 | * data fork, and does not modify the inode size, which is left to the caller. | |
1da177e4 | 1446 | * |
f6485057 DC |
1447 | * The transaction passed to this routine must have made a permanent log |
1448 | * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the | |
1449 | * given transaction and start new ones, so make sure everything involved in | |
1450 | * the transaction is tidy before calling here. Some transaction will be | |
1451 | * returned to the caller to be committed. The incoming transaction must | |
1452 | * already include the inode, and both inode locks must be held exclusively. | |
1453 | * The inode must also be "held" within the transaction. On return the inode | |
1454 | * will be "held" within the returned transaction. This routine does NOT | |
1455 | * require any disk space to be reserved for it within the transaction. | |
1da177e4 | 1456 | * |
f6485057 DC |
1457 | * If we get an error, we must return with the inode locked and linked into the |
1458 | * current transaction. This keeps things simple for the higher level code, | |
1459 | * because it always knows that the inode is locked and held in the transaction | |
1460 | * that returns to it whether errors occur or not. We don't mark the inode | |
1461 | * dirty on error so that transactions can be easily aborted if possible. | |
1da177e4 LT |
1462 | */ |
1463 | int | |
8f04c47a CH |
1464 | xfs_itruncate_extents( |
1465 | struct xfs_trans **tpp, | |
1466 | struct xfs_inode *ip, | |
1467 | int whichfork, | |
1468 | xfs_fsize_t new_size) | |
1da177e4 | 1469 | { |
8f04c47a CH |
1470 | struct xfs_mount *mp = ip->i_mount; |
1471 | struct xfs_trans *tp = *tpp; | |
1472 | struct xfs_trans *ntp; | |
1473 | xfs_bmap_free_t free_list; | |
1474 | xfs_fsblock_t first_block; | |
1475 | xfs_fileoff_t first_unmap_block; | |
1476 | xfs_fileoff_t last_block; | |
1477 | xfs_filblks_t unmap_len; | |
1478 | int committed; | |
1479 | int error = 0; | |
1480 | int done = 0; | |
1da177e4 | 1481 | |
0b56185b CH |
1482 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1483 | ASSERT(!atomic_read(&VFS_I(ip)->i_count) || | |
1484 | xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
ce7ae151 | 1485 | ASSERT(new_size <= XFS_ISIZE(ip)); |
8f04c47a | 1486 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
1da177e4 | 1487 | ASSERT(ip->i_itemp != NULL); |
898621d5 | 1488 | ASSERT(ip->i_itemp->ili_lock_flags == 0); |
8f04c47a | 1489 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); |
1da177e4 | 1490 | |
673e8e59 CH |
1491 | trace_xfs_itruncate_extents_start(ip, new_size); |
1492 | ||
1da177e4 LT |
1493 | /* |
1494 | * Since it is possible for space to become allocated beyond | |
1495 | * the end of the file (in a crash where the space is allocated | |
1496 | * but the inode size is not yet updated), simply remove any | |
1497 | * blocks which show up between the new EOF and the maximum | |
1498 | * possible file size. If the first block to be removed is | |
1499 | * beyond the maximum file size (ie it is the same as last_block), | |
1500 | * then there is nothing to do. | |
1501 | */ | |
8f04c47a | 1502 | first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
32972383 | 1503 | last_block = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
8f04c47a CH |
1504 | if (first_unmap_block == last_block) |
1505 | return 0; | |
1506 | ||
1507 | ASSERT(first_unmap_block < last_block); | |
1508 | unmap_len = last_block - first_unmap_block + 1; | |
1da177e4 | 1509 | while (!done) { |
9d87c319 | 1510 | xfs_bmap_init(&free_list, &first_block); |
8f04c47a | 1511 | error = xfs_bunmapi(tp, ip, |
3e57ecf6 | 1512 | first_unmap_block, unmap_len, |
8f04c47a | 1513 | xfs_bmapi_aflag(whichfork), |
1da177e4 | 1514 | XFS_ITRUNC_MAX_EXTENTS, |
3e57ecf6 | 1515 | &first_block, &free_list, |
b4e9181e | 1516 | &done); |
8f04c47a CH |
1517 | if (error) |
1518 | goto out_bmap_cancel; | |
1da177e4 LT |
1519 | |
1520 | /* | |
1521 | * Duplicate the transaction that has the permanent | |
1522 | * reservation and commit the old transaction. | |
1523 | */ | |
8f04c47a | 1524 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
898621d5 | 1525 | if (committed) |
ddc3415a | 1526 | xfs_trans_ijoin(tp, ip, 0); |
8f04c47a CH |
1527 | if (error) |
1528 | goto out_bmap_cancel; | |
1da177e4 LT |
1529 | |
1530 | if (committed) { | |
1531 | /* | |
f6485057 | 1532 | * Mark the inode dirty so it will be logged and |
e5720eec | 1533 | * moved forward in the log as part of every commit. |
1da177e4 | 1534 | */ |
8f04c47a | 1535 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1da177e4 | 1536 | } |
f6485057 | 1537 | |
8f04c47a CH |
1538 | ntp = xfs_trans_dup(tp); |
1539 | error = xfs_trans_commit(tp, 0); | |
1540 | tp = ntp; | |
e5720eec | 1541 | |
ddc3415a | 1542 | xfs_trans_ijoin(tp, ip, 0); |
f6485057 | 1543 | |
cc09c0dc | 1544 | if (error) |
8f04c47a CH |
1545 | goto out; |
1546 | ||
cc09c0dc | 1547 | /* |
8f04c47a | 1548 | * Transaction commit worked ok so we can drop the extra ticket |
cc09c0dc DC |
1549 | * reference that we gained in xfs_trans_dup() |
1550 | */ | |
8f04c47a CH |
1551 | xfs_log_ticket_put(tp->t_ticket); |
1552 | error = xfs_trans_reserve(tp, 0, | |
f6485057 DC |
1553 | XFS_ITRUNCATE_LOG_RES(mp), 0, |
1554 | XFS_TRANS_PERM_LOG_RES, | |
1555 | XFS_ITRUNCATE_LOG_COUNT); | |
1556 | if (error) | |
8f04c47a | 1557 | goto out; |
1da177e4 | 1558 | } |
8f04c47a | 1559 | |
673e8e59 CH |
1560 | /* |
1561 | * Always re-log the inode so that our permanent transaction can keep | |
1562 | * on rolling it forward in the log. | |
1563 | */ | |
1564 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1565 | ||
1566 | trace_xfs_itruncate_extents_end(ip, new_size); | |
1567 | ||
8f04c47a CH |
1568 | out: |
1569 | *tpp = tp; | |
1570 | return error; | |
1571 | out_bmap_cancel: | |
1da177e4 | 1572 | /* |
8f04c47a CH |
1573 | * If the bunmapi call encounters an error, return to the caller where |
1574 | * the transaction can be properly aborted. We just need to make sure | |
1575 | * we're not holding any resources that we were not when we came in. | |
1da177e4 | 1576 | */ |
8f04c47a CH |
1577 | xfs_bmap_cancel(&free_list); |
1578 | goto out; | |
1579 | } | |
1580 | ||
1da177e4 LT |
1581 | /* |
1582 | * This is called when the inode's link count goes to 0. | |
1583 | * We place the on-disk inode on a list in the AGI. It | |
1584 | * will be pulled from this list when the inode is freed. | |
1585 | */ | |
1586 | int | |
1587 | xfs_iunlink( | |
1588 | xfs_trans_t *tp, | |
1589 | xfs_inode_t *ip) | |
1590 | { | |
1591 | xfs_mount_t *mp; | |
1592 | xfs_agi_t *agi; | |
1593 | xfs_dinode_t *dip; | |
1594 | xfs_buf_t *agibp; | |
1595 | xfs_buf_t *ibp; | |
1da177e4 LT |
1596 | xfs_agino_t agino; |
1597 | short bucket_index; | |
1598 | int offset; | |
1599 | int error; | |
1da177e4 LT |
1600 | |
1601 | ASSERT(ip->i_d.di_nlink == 0); | |
1602 | ASSERT(ip->i_d.di_mode != 0); | |
1da177e4 LT |
1603 | |
1604 | mp = tp->t_mountp; | |
1605 | ||
1da177e4 LT |
1606 | /* |
1607 | * Get the agi buffer first. It ensures lock ordering | |
1608 | * on the list. | |
1609 | */ | |
5e1be0fb | 1610 | error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp); |
859d7182 | 1611 | if (error) |
1da177e4 | 1612 | return error; |
1da177e4 | 1613 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 1614 | |
1da177e4 LT |
1615 | /* |
1616 | * Get the index into the agi hash table for the | |
1617 | * list this inode will go on. | |
1618 | */ | |
1619 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
1620 | ASSERT(agino != 0); | |
1621 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
1622 | ASSERT(agi->agi_unlinked[bucket_index]); | |
16259e7d | 1623 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino); |
1da177e4 | 1624 | |
69ef921b | 1625 | if (agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)) { |
1da177e4 LT |
1626 | /* |
1627 | * There is already another inode in the bucket we need | |
1628 | * to add ourselves to. Add us at the front of the list. | |
1629 | * Here we put the head pointer into our next pointer, | |
1630 | * and then we fall through to point the head at us. | |
1631 | */ | |
475ee413 CH |
1632 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
1633 | 0, 0); | |
c319b58b VA |
1634 | if (error) |
1635 | return error; | |
1636 | ||
69ef921b | 1637 | ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO)); |
1da177e4 | 1638 | dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; |
92bfc6e7 | 1639 | offset = ip->i_imap.im_boffset + |
1da177e4 LT |
1640 | offsetof(xfs_dinode_t, di_next_unlinked); |
1641 | xfs_trans_inode_buf(tp, ibp); | |
1642 | xfs_trans_log_buf(tp, ibp, offset, | |
1643 | (offset + sizeof(xfs_agino_t) - 1)); | |
1644 | xfs_inobp_check(mp, ibp); | |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Point the bucket head pointer at the inode being inserted. | |
1649 | */ | |
1650 | ASSERT(agino != 0); | |
16259e7d | 1651 | agi->agi_unlinked[bucket_index] = cpu_to_be32(agino); |
1da177e4 LT |
1652 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
1653 | (sizeof(xfs_agino_t) * bucket_index); | |
1654 | xfs_trans_log_buf(tp, agibp, offset, | |
1655 | (offset + sizeof(xfs_agino_t) - 1)); | |
1656 | return 0; | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Pull the on-disk inode from the AGI unlinked list. | |
1661 | */ | |
1662 | STATIC int | |
1663 | xfs_iunlink_remove( | |
1664 | xfs_trans_t *tp, | |
1665 | xfs_inode_t *ip) | |
1666 | { | |
1667 | xfs_ino_t next_ino; | |
1668 | xfs_mount_t *mp; | |
1669 | xfs_agi_t *agi; | |
1670 | xfs_dinode_t *dip; | |
1671 | xfs_buf_t *agibp; | |
1672 | xfs_buf_t *ibp; | |
1673 | xfs_agnumber_t agno; | |
1da177e4 LT |
1674 | xfs_agino_t agino; |
1675 | xfs_agino_t next_agino; | |
1676 | xfs_buf_t *last_ibp; | |
6fdf8ccc | 1677 | xfs_dinode_t *last_dip = NULL; |
1da177e4 | 1678 | short bucket_index; |
6fdf8ccc | 1679 | int offset, last_offset = 0; |
1da177e4 | 1680 | int error; |
1da177e4 | 1681 | |
1da177e4 | 1682 | mp = tp->t_mountp; |
1da177e4 | 1683 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
1da177e4 LT |
1684 | |
1685 | /* | |
1686 | * Get the agi buffer first. It ensures lock ordering | |
1687 | * on the list. | |
1688 | */ | |
5e1be0fb CH |
1689 | error = xfs_read_agi(mp, tp, agno, &agibp); |
1690 | if (error) | |
1da177e4 | 1691 | return error; |
5e1be0fb | 1692 | |
1da177e4 | 1693 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 1694 | |
1da177e4 LT |
1695 | /* |
1696 | * Get the index into the agi hash table for the | |
1697 | * list this inode will go on. | |
1698 | */ | |
1699 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
1700 | ASSERT(agino != 0); | |
1701 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
69ef921b | 1702 | ASSERT(agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)); |
1da177e4 LT |
1703 | ASSERT(agi->agi_unlinked[bucket_index]); |
1704 | ||
16259e7d | 1705 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) { |
1da177e4 | 1706 | /* |
475ee413 CH |
1707 | * We're at the head of the list. Get the inode's on-disk |
1708 | * buffer to see if there is anyone after us on the list. | |
1709 | * Only modify our next pointer if it is not already NULLAGINO. | |
1710 | * This saves us the overhead of dealing with the buffer when | |
1711 | * there is no need to change it. | |
1da177e4 | 1712 | */ |
475ee413 CH |
1713 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
1714 | 0, 0); | |
1da177e4 | 1715 | if (error) { |
475ee413 | 1716 | xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 1717 | __func__, error); |
1da177e4 LT |
1718 | return error; |
1719 | } | |
347d1c01 | 1720 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
1721 | ASSERT(next_agino != 0); |
1722 | if (next_agino != NULLAGINO) { | |
347d1c01 | 1723 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 1724 | offset = ip->i_imap.im_boffset + |
1da177e4 LT |
1725 | offsetof(xfs_dinode_t, di_next_unlinked); |
1726 | xfs_trans_inode_buf(tp, ibp); | |
1727 | xfs_trans_log_buf(tp, ibp, offset, | |
1728 | (offset + sizeof(xfs_agino_t) - 1)); | |
1729 | xfs_inobp_check(mp, ibp); | |
1730 | } else { | |
1731 | xfs_trans_brelse(tp, ibp); | |
1732 | } | |
1733 | /* | |
1734 | * Point the bucket head pointer at the next inode. | |
1735 | */ | |
1736 | ASSERT(next_agino != 0); | |
1737 | ASSERT(next_agino != agino); | |
16259e7d | 1738 | agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino); |
1da177e4 LT |
1739 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
1740 | (sizeof(xfs_agino_t) * bucket_index); | |
1741 | xfs_trans_log_buf(tp, agibp, offset, | |
1742 | (offset + sizeof(xfs_agino_t) - 1)); | |
1743 | } else { | |
1744 | /* | |
1745 | * We need to search the list for the inode being freed. | |
1746 | */ | |
16259e7d | 1747 | next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]); |
1da177e4 LT |
1748 | last_ibp = NULL; |
1749 | while (next_agino != agino) { | |
129dbc9a CH |
1750 | struct xfs_imap imap; |
1751 | ||
1752 | if (last_ibp) | |
1da177e4 | 1753 | xfs_trans_brelse(tp, last_ibp); |
129dbc9a CH |
1754 | |
1755 | imap.im_blkno = 0; | |
1da177e4 | 1756 | next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino); |
129dbc9a CH |
1757 | |
1758 | error = xfs_imap(mp, tp, next_ino, &imap, 0); | |
1759 | if (error) { | |
1760 | xfs_warn(mp, | |
1761 | "%s: xfs_imap returned error %d.", | |
1762 | __func__, error); | |
1763 | return error; | |
1764 | } | |
1765 | ||
1766 | error = xfs_imap_to_bp(mp, tp, &imap, &last_dip, | |
1767 | &last_ibp, 0, 0); | |
1da177e4 | 1768 | if (error) { |
0b932ccc | 1769 | xfs_warn(mp, |
129dbc9a | 1770 | "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 1771 | __func__, error); |
1da177e4 LT |
1772 | return error; |
1773 | } | |
129dbc9a CH |
1774 | |
1775 | last_offset = imap.im_boffset; | |
347d1c01 | 1776 | next_agino = be32_to_cpu(last_dip->di_next_unlinked); |
1da177e4 LT |
1777 | ASSERT(next_agino != NULLAGINO); |
1778 | ASSERT(next_agino != 0); | |
1779 | } | |
475ee413 | 1780 | |
1da177e4 | 1781 | /* |
475ee413 CH |
1782 | * Now last_ibp points to the buffer previous to us on the |
1783 | * unlinked list. Pull us from the list. | |
1da177e4 | 1784 | */ |
475ee413 CH |
1785 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
1786 | 0, 0); | |
1da177e4 | 1787 | if (error) { |
475ee413 | 1788 | xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.", |
0b932ccc | 1789 | __func__, error); |
1da177e4 LT |
1790 | return error; |
1791 | } | |
347d1c01 | 1792 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
1793 | ASSERT(next_agino != 0); |
1794 | ASSERT(next_agino != agino); | |
1795 | if (next_agino != NULLAGINO) { | |
347d1c01 | 1796 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 1797 | offset = ip->i_imap.im_boffset + |
1da177e4 LT |
1798 | offsetof(xfs_dinode_t, di_next_unlinked); |
1799 | xfs_trans_inode_buf(tp, ibp); | |
1800 | xfs_trans_log_buf(tp, ibp, offset, | |
1801 | (offset + sizeof(xfs_agino_t) - 1)); | |
1802 | xfs_inobp_check(mp, ibp); | |
1803 | } else { | |
1804 | xfs_trans_brelse(tp, ibp); | |
1805 | } | |
1806 | /* | |
1807 | * Point the previous inode on the list to the next inode. | |
1808 | */ | |
347d1c01 | 1809 | last_dip->di_next_unlinked = cpu_to_be32(next_agino); |
1da177e4 LT |
1810 | ASSERT(next_agino != 0); |
1811 | offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked); | |
1812 | xfs_trans_inode_buf(tp, last_ibp); | |
1813 | xfs_trans_log_buf(tp, last_ibp, offset, | |
1814 | (offset + sizeof(xfs_agino_t) - 1)); | |
1815 | xfs_inobp_check(mp, last_ibp); | |
1816 | } | |
1817 | return 0; | |
1818 | } | |
1819 | ||
5b3eed75 DC |
1820 | /* |
1821 | * A big issue when freeing the inode cluster is is that we _cannot_ skip any | |
1822 | * inodes that are in memory - they all must be marked stale and attached to | |
1823 | * the cluster buffer. | |
1824 | */ | |
2a30f36d | 1825 | STATIC int |
1da177e4 LT |
1826 | xfs_ifree_cluster( |
1827 | xfs_inode_t *free_ip, | |
1828 | xfs_trans_t *tp, | |
1829 | xfs_ino_t inum) | |
1830 | { | |
1831 | xfs_mount_t *mp = free_ip->i_mount; | |
1832 | int blks_per_cluster; | |
1833 | int nbufs; | |
1834 | int ninodes; | |
5b257b4a | 1835 | int i, j; |
1da177e4 LT |
1836 | xfs_daddr_t blkno; |
1837 | xfs_buf_t *bp; | |
5b257b4a | 1838 | xfs_inode_t *ip; |
1da177e4 LT |
1839 | xfs_inode_log_item_t *iip; |
1840 | xfs_log_item_t *lip; | |
5017e97d | 1841 | struct xfs_perag *pag; |
1da177e4 | 1842 | |
5017e97d | 1843 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum)); |
1da177e4 LT |
1844 | if (mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) { |
1845 | blks_per_cluster = 1; | |
1846 | ninodes = mp->m_sb.sb_inopblock; | |
1847 | nbufs = XFS_IALLOC_BLOCKS(mp); | |
1848 | } else { | |
1849 | blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) / | |
1850 | mp->m_sb.sb_blocksize; | |
1851 | ninodes = blks_per_cluster * mp->m_sb.sb_inopblock; | |
1852 | nbufs = XFS_IALLOC_BLOCKS(mp) / blks_per_cluster; | |
1853 | } | |
1854 | ||
1da177e4 LT |
1855 | for (j = 0; j < nbufs; j++, inum += ninodes) { |
1856 | blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum), | |
1857 | XFS_INO_TO_AGBNO(mp, inum)); | |
1858 | ||
5b257b4a DC |
1859 | /* |
1860 | * We obtain and lock the backing buffer first in the process | |
1861 | * here, as we have to ensure that any dirty inode that we | |
1862 | * can't get the flush lock on is attached to the buffer. | |
1863 | * If we scan the in-memory inodes first, then buffer IO can | |
1864 | * complete before we get a lock on it, and hence we may fail | |
1865 | * to mark all the active inodes on the buffer stale. | |
1866 | */ | |
1867 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, | |
b6aff29f DC |
1868 | mp->m_bsize * blks_per_cluster, |
1869 | XBF_UNMAPPED); | |
5b257b4a | 1870 | |
2a30f36d CS |
1871 | if (!bp) |
1872 | return ENOMEM; | |
b0f539de DC |
1873 | |
1874 | /* | |
1875 | * This buffer may not have been correctly initialised as we | |
1876 | * didn't read it from disk. That's not important because we are | |
1877 | * only using to mark the buffer as stale in the log, and to | |
1878 | * attach stale cached inodes on it. That means it will never be | |
1879 | * dispatched for IO. If it is, we want to know about it, and we | |
1880 | * want it to fail. We can acheive this by adding a write | |
1881 | * verifier to the buffer. | |
1882 | */ | |
1813dd64 | 1883 | bp->b_ops = &xfs_inode_buf_ops; |
b0f539de | 1884 | |
5b257b4a DC |
1885 | /* |
1886 | * Walk the inodes already attached to the buffer and mark them | |
1887 | * stale. These will all have the flush locks held, so an | |
5b3eed75 DC |
1888 | * in-memory inode walk can't lock them. By marking them all |
1889 | * stale first, we will not attempt to lock them in the loop | |
1890 | * below as the XFS_ISTALE flag will be set. | |
5b257b4a | 1891 | */ |
adadbeef | 1892 | lip = bp->b_fspriv; |
5b257b4a DC |
1893 | while (lip) { |
1894 | if (lip->li_type == XFS_LI_INODE) { | |
1895 | iip = (xfs_inode_log_item_t *)lip; | |
1896 | ASSERT(iip->ili_logged == 1); | |
ca30b2a7 | 1897 | lip->li_cb = xfs_istale_done; |
5b257b4a DC |
1898 | xfs_trans_ail_copy_lsn(mp->m_ail, |
1899 | &iip->ili_flush_lsn, | |
1900 | &iip->ili_item.li_lsn); | |
1901 | xfs_iflags_set(iip->ili_inode, XFS_ISTALE); | |
5b257b4a DC |
1902 | } |
1903 | lip = lip->li_bio_list; | |
1904 | } | |
1da177e4 | 1905 | |
5b3eed75 | 1906 | |
1da177e4 | 1907 | /* |
5b257b4a DC |
1908 | * For each inode in memory attempt to add it to the inode |
1909 | * buffer and set it up for being staled on buffer IO | |
1910 | * completion. This is safe as we've locked out tail pushing | |
1911 | * and flushing by locking the buffer. | |
1da177e4 | 1912 | * |
5b257b4a DC |
1913 | * We have already marked every inode that was part of a |
1914 | * transaction stale above, which means there is no point in | |
1915 | * even trying to lock them. | |
1da177e4 | 1916 | */ |
1da177e4 | 1917 | for (i = 0; i < ninodes; i++) { |
5b3eed75 | 1918 | retry: |
1a3e8f3d | 1919 | rcu_read_lock(); |
da353b0d DC |
1920 | ip = radix_tree_lookup(&pag->pag_ici_root, |
1921 | XFS_INO_TO_AGINO(mp, (inum + i))); | |
1da177e4 | 1922 | |
1a3e8f3d DC |
1923 | /* Inode not in memory, nothing to do */ |
1924 | if (!ip) { | |
1925 | rcu_read_unlock(); | |
1da177e4 LT |
1926 | continue; |
1927 | } | |
1928 | ||
1a3e8f3d DC |
1929 | /* |
1930 | * because this is an RCU protected lookup, we could | |
1931 | * find a recently freed or even reallocated inode | |
1932 | * during the lookup. We need to check under the | |
1933 | * i_flags_lock for a valid inode here. Skip it if it | |
1934 | * is not valid, the wrong inode or stale. | |
1935 | */ | |
1936 | spin_lock(&ip->i_flags_lock); | |
1937 | if (ip->i_ino != inum + i || | |
1938 | __xfs_iflags_test(ip, XFS_ISTALE)) { | |
1939 | spin_unlock(&ip->i_flags_lock); | |
1940 | rcu_read_unlock(); | |
1941 | continue; | |
1942 | } | |
1943 | spin_unlock(&ip->i_flags_lock); | |
1944 | ||
5b3eed75 DC |
1945 | /* |
1946 | * Don't try to lock/unlock the current inode, but we | |
1947 | * _cannot_ skip the other inodes that we did not find | |
1948 | * in the list attached to the buffer and are not | |
1949 | * already marked stale. If we can't lock it, back off | |
1950 | * and retry. | |
1951 | */ | |
5b257b4a DC |
1952 | if (ip != free_ip && |
1953 | !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { | |
1a3e8f3d | 1954 | rcu_read_unlock(); |
5b3eed75 DC |
1955 | delay(1); |
1956 | goto retry; | |
1da177e4 | 1957 | } |
1a3e8f3d | 1958 | rcu_read_unlock(); |
1da177e4 | 1959 | |
5b3eed75 | 1960 | xfs_iflock(ip); |
5b257b4a | 1961 | xfs_iflags_set(ip, XFS_ISTALE); |
1da177e4 | 1962 | |
5b3eed75 DC |
1963 | /* |
1964 | * we don't need to attach clean inodes or those only | |
1965 | * with unlogged changes (which we throw away, anyway). | |
1966 | */ | |
1da177e4 | 1967 | iip = ip->i_itemp; |
5b3eed75 | 1968 | if (!iip || xfs_inode_clean(ip)) { |
5b257b4a | 1969 | ASSERT(ip != free_ip); |
1da177e4 LT |
1970 | xfs_ifunlock(ip); |
1971 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1972 | continue; | |
1973 | } | |
1974 | ||
f5d8d5c4 CH |
1975 | iip->ili_last_fields = iip->ili_fields; |
1976 | iip->ili_fields = 0; | |
1da177e4 | 1977 | iip->ili_logged = 1; |
7b2e2a31 DC |
1978 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
1979 | &iip->ili_item.li_lsn); | |
1da177e4 | 1980 | |
ca30b2a7 CH |
1981 | xfs_buf_attach_iodone(bp, xfs_istale_done, |
1982 | &iip->ili_item); | |
5b257b4a DC |
1983 | |
1984 | if (ip != free_ip) | |
1da177e4 | 1985 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
1986 | } |
1987 | ||
5b3eed75 | 1988 | xfs_trans_stale_inode_buf(tp, bp); |
1da177e4 LT |
1989 | xfs_trans_binval(tp, bp); |
1990 | } | |
1991 | ||
5017e97d | 1992 | xfs_perag_put(pag); |
2a30f36d | 1993 | return 0; |
1da177e4 LT |
1994 | } |
1995 | ||
1996 | /* | |
1997 | * This is called to return an inode to the inode free list. | |
1998 | * The inode should already be truncated to 0 length and have | |
1999 | * no pages associated with it. This routine also assumes that | |
2000 | * the inode is already a part of the transaction. | |
2001 | * | |
2002 | * The on-disk copy of the inode will have been added to the list | |
2003 | * of unlinked inodes in the AGI. We need to remove the inode from | |
2004 | * that list atomically with respect to freeing it here. | |
2005 | */ | |
2006 | int | |
2007 | xfs_ifree( | |
2008 | xfs_trans_t *tp, | |
2009 | xfs_inode_t *ip, | |
2010 | xfs_bmap_free_t *flist) | |
2011 | { | |
2012 | int error; | |
2013 | int delete; | |
2014 | xfs_ino_t first_ino; | |
c319b58b VA |
2015 | xfs_dinode_t *dip; |
2016 | xfs_buf_t *ibp; | |
1da177e4 | 2017 | |
579aa9ca | 2018 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
2019 | ASSERT(ip->i_d.di_nlink == 0); |
2020 | ASSERT(ip->i_d.di_nextents == 0); | |
2021 | ASSERT(ip->i_d.di_anextents == 0); | |
ce7ae151 | 2022 | ASSERT(ip->i_d.di_size == 0 || !S_ISREG(ip->i_d.di_mode)); |
1da177e4 LT |
2023 | ASSERT(ip->i_d.di_nblocks == 0); |
2024 | ||
2025 | /* | |
2026 | * Pull the on-disk inode from the AGI unlinked list. | |
2027 | */ | |
2028 | error = xfs_iunlink_remove(tp, ip); | |
2029 | if (error != 0) { | |
2030 | return error; | |
2031 | } | |
2032 | ||
2033 | error = xfs_difree(tp, ip->i_ino, flist, &delete, &first_ino); | |
2034 | if (error != 0) { | |
2035 | return error; | |
2036 | } | |
2037 | ip->i_d.di_mode = 0; /* mark incore inode as free */ | |
2038 | ip->i_d.di_flags = 0; | |
2039 | ip->i_d.di_dmevmask = 0; | |
2040 | ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */ | |
1da177e4 LT |
2041 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
2042 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
2043 | /* | |
2044 | * Bump the generation count so no one will be confused | |
2045 | * by reincarnations of this inode. | |
2046 | */ | |
2047 | ip->i_d.di_gen++; | |
c319b58b | 2048 | |
1da177e4 LT |
2049 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
2050 | ||
475ee413 CH |
2051 | error = xfs_imap_to_bp(ip->i_mount, tp, &ip->i_imap, &dip, &ibp, |
2052 | 0, 0); | |
c319b58b VA |
2053 | if (error) |
2054 | return error; | |
2055 | ||
2056 | /* | |
2057 | * Clear the on-disk di_mode. This is to prevent xfs_bulkstat | |
2058 | * from picking up this inode when it is reclaimed (its incore state | |
2059 | * initialzed but not flushed to disk yet). The in-core di_mode is | |
2060 | * already cleared and a corresponding transaction logged. | |
2061 | * The hack here just synchronizes the in-core to on-disk | |
2062 | * di_mode value in advance before the actual inode sync to disk. | |
2063 | * This is OK because the inode is already unlinked and would never | |
2064 | * change its di_mode again for this inode generation. | |
2065 | * This is a temporary hack that would require a proper fix | |
2066 | * in the future. | |
2067 | */ | |
81591fe2 | 2068 | dip->di_mode = 0; |
c319b58b | 2069 | |
1da177e4 | 2070 | if (delete) { |
2a30f36d | 2071 | error = xfs_ifree_cluster(ip, tp, first_ino); |
1da177e4 LT |
2072 | } |
2073 | ||
2a30f36d | 2074 | return error; |
1da177e4 LT |
2075 | } |
2076 | ||
2077 | /* | |
2078 | * Reallocate the space for if_broot based on the number of records | |
2079 | * being added or deleted as indicated in rec_diff. Move the records | |
2080 | * and pointers in if_broot to fit the new size. When shrinking this | |
2081 | * will eliminate holes between the records and pointers created by | |
2082 | * the caller. When growing this will create holes to be filled in | |
2083 | * by the caller. | |
2084 | * | |
2085 | * The caller must not request to add more records than would fit in | |
2086 | * the on-disk inode root. If the if_broot is currently NULL, then | |
2087 | * if we adding records one will be allocated. The caller must also | |
2088 | * not request that the number of records go below zero, although | |
2089 | * it can go to zero. | |
2090 | * | |
2091 | * ip -- the inode whose if_broot area is changing | |
2092 | * ext_diff -- the change in the number of records, positive or negative, | |
2093 | * requested for the if_broot array. | |
2094 | */ | |
2095 | void | |
2096 | xfs_iroot_realloc( | |
2097 | xfs_inode_t *ip, | |
2098 | int rec_diff, | |
2099 | int whichfork) | |
2100 | { | |
60197e8d | 2101 | struct xfs_mount *mp = ip->i_mount; |
1da177e4 LT |
2102 | int cur_max; |
2103 | xfs_ifork_t *ifp; | |
7cc95a82 | 2104 | struct xfs_btree_block *new_broot; |
1da177e4 LT |
2105 | int new_max; |
2106 | size_t new_size; | |
2107 | char *np; | |
2108 | char *op; | |
2109 | ||
2110 | /* | |
2111 | * Handle the degenerate case quietly. | |
2112 | */ | |
2113 | if (rec_diff == 0) { | |
2114 | return; | |
2115 | } | |
2116 | ||
2117 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
2118 | if (rec_diff > 0) { | |
2119 | /* | |
2120 | * If there wasn't any memory allocated before, just | |
2121 | * allocate it now and get out. | |
2122 | */ | |
2123 | if (ifp->if_broot_bytes == 0) { | |
ee1a47ab | 2124 | new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, rec_diff); |
4a7edddc | 2125 | ifp->if_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS); |
1da177e4 LT |
2126 | ifp->if_broot_bytes = (int)new_size; |
2127 | return; | |
2128 | } | |
2129 | ||
2130 | /* | |
2131 | * If there is already an existing if_broot, then we need | |
2132 | * to realloc() it and shift the pointers to their new | |
2133 | * location. The records don't change location because | |
2134 | * they are kept butted up against the btree block header. | |
2135 | */ | |
60197e8d | 2136 | cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0); |
1da177e4 | 2137 | new_max = cur_max + rec_diff; |
ee1a47ab | 2138 | new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max); |
7cc95a82 | 2139 | ifp->if_broot = kmem_realloc(ifp->if_broot, new_size, |
ee1a47ab | 2140 | XFS_BMAP_BROOT_SPACE_CALC(mp, cur_max), |
4a7edddc | 2141 | KM_SLEEP | KM_NOFS); |
60197e8d CH |
2142 | op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
2143 | ifp->if_broot_bytes); | |
2144 | np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, | |
2145 | (int)new_size); | |
1da177e4 LT |
2146 | ifp->if_broot_bytes = (int)new_size; |
2147 | ASSERT(ifp->if_broot_bytes <= | |
ee1a47ab | 2148 | XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ(ip)); |
1da177e4 LT |
2149 | memmove(np, op, cur_max * (uint)sizeof(xfs_dfsbno_t)); |
2150 | return; | |
2151 | } | |
2152 | ||
2153 | /* | |
2154 | * rec_diff is less than 0. In this case, we are shrinking the | |
2155 | * if_broot buffer. It must already exist. If we go to zero | |
2156 | * records, just get rid of the root and clear the status bit. | |
2157 | */ | |
2158 | ASSERT((ifp->if_broot != NULL) && (ifp->if_broot_bytes > 0)); | |
60197e8d | 2159 | cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0); |
1da177e4 LT |
2160 | new_max = cur_max + rec_diff; |
2161 | ASSERT(new_max >= 0); | |
2162 | if (new_max > 0) | |
ee1a47ab | 2163 | new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max); |
1da177e4 LT |
2164 | else |
2165 | new_size = 0; | |
2166 | if (new_size > 0) { | |
4a7edddc | 2167 | new_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS); |
1da177e4 LT |
2168 | /* |
2169 | * First copy over the btree block header. | |
2170 | */ | |
ee1a47ab CH |
2171 | memcpy(new_broot, ifp->if_broot, |
2172 | XFS_BMBT_BLOCK_LEN(ip->i_mount)); | |
1da177e4 LT |
2173 | } else { |
2174 | new_broot = NULL; | |
2175 | ifp->if_flags &= ~XFS_IFBROOT; | |
2176 | } | |
2177 | ||
2178 | /* | |
2179 | * Only copy the records and pointers if there are any. | |
2180 | */ | |
2181 | if (new_max > 0) { | |
2182 | /* | |
2183 | * First copy the records. | |
2184 | */ | |
136341b4 CH |
2185 | op = (char *)XFS_BMBT_REC_ADDR(mp, ifp->if_broot, 1); |
2186 | np = (char *)XFS_BMBT_REC_ADDR(mp, new_broot, 1); | |
1da177e4 LT |
2187 | memcpy(np, op, new_max * (uint)sizeof(xfs_bmbt_rec_t)); |
2188 | ||
2189 | /* | |
2190 | * Then copy the pointers. | |
2191 | */ | |
60197e8d | 2192 | op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
1da177e4 | 2193 | ifp->if_broot_bytes); |
60197e8d | 2194 | np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, new_broot, 1, |
1da177e4 LT |
2195 | (int)new_size); |
2196 | memcpy(np, op, new_max * (uint)sizeof(xfs_dfsbno_t)); | |
2197 | } | |
f0e2d93c | 2198 | kmem_free(ifp->if_broot); |
1da177e4 LT |
2199 | ifp->if_broot = new_broot; |
2200 | ifp->if_broot_bytes = (int)new_size; | |
2201 | ASSERT(ifp->if_broot_bytes <= | |
ee1a47ab | 2202 | XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ(ip)); |
1da177e4 LT |
2203 | return; |
2204 | } | |
2205 | ||
2206 | ||
1da177e4 LT |
2207 | /* |
2208 | * This is called when the amount of space needed for if_data | |
2209 | * is increased or decreased. The change in size is indicated by | |
2210 | * the number of bytes that need to be added or deleted in the | |
2211 | * byte_diff parameter. | |
2212 | * | |
2213 | * If the amount of space needed has decreased below the size of the | |
2214 | * inline buffer, then switch to using the inline buffer. Otherwise, | |
2215 | * use kmem_realloc() or kmem_alloc() to adjust the size of the buffer | |
2216 | * to what is needed. | |
2217 | * | |
2218 | * ip -- the inode whose if_data area is changing | |
2219 | * byte_diff -- the change in the number of bytes, positive or negative, | |
2220 | * requested for the if_data array. | |
2221 | */ | |
2222 | void | |
2223 | xfs_idata_realloc( | |
2224 | xfs_inode_t *ip, | |
2225 | int byte_diff, | |
2226 | int whichfork) | |
2227 | { | |
2228 | xfs_ifork_t *ifp; | |
2229 | int new_size; | |
2230 | int real_size; | |
2231 | ||
2232 | if (byte_diff == 0) { | |
2233 | return; | |
2234 | } | |
2235 | ||
2236 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
2237 | new_size = (int)ifp->if_bytes + byte_diff; | |
2238 | ASSERT(new_size >= 0); | |
2239 | ||
2240 | if (new_size == 0) { | |
2241 | if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { | |
f0e2d93c | 2242 | kmem_free(ifp->if_u1.if_data); |
1da177e4 LT |
2243 | } |
2244 | ifp->if_u1.if_data = NULL; | |
2245 | real_size = 0; | |
2246 | } else if (new_size <= sizeof(ifp->if_u2.if_inline_data)) { | |
2247 | /* | |
2248 | * If the valid extents/data can fit in if_inline_ext/data, | |
2249 | * copy them from the malloc'd vector and free it. | |
2250 | */ | |
2251 | if (ifp->if_u1.if_data == NULL) { | |
2252 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; | |
2253 | } else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { | |
2254 | ASSERT(ifp->if_real_bytes != 0); | |
2255 | memcpy(ifp->if_u2.if_inline_data, ifp->if_u1.if_data, | |
2256 | new_size); | |
f0e2d93c | 2257 | kmem_free(ifp->if_u1.if_data); |
1da177e4 LT |
2258 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
2259 | } | |
2260 | real_size = 0; | |
2261 | } else { | |
2262 | /* | |
2263 | * Stuck with malloc/realloc. | |
2264 | * For inline data, the underlying buffer must be | |
2265 | * a multiple of 4 bytes in size so that it can be | |
2266 | * logged and stay on word boundaries. We enforce | |
2267 | * that here. | |
2268 | */ | |
2269 | real_size = roundup(new_size, 4); | |
2270 | if (ifp->if_u1.if_data == NULL) { | |
2271 | ASSERT(ifp->if_real_bytes == 0); | |
4a7edddc DC |
2272 | ifp->if_u1.if_data = kmem_alloc(real_size, |
2273 | KM_SLEEP | KM_NOFS); | |
1da177e4 LT |
2274 | } else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
2275 | /* | |
2276 | * Only do the realloc if the underlying size | |
2277 | * is really changing. | |
2278 | */ | |
2279 | if (ifp->if_real_bytes != real_size) { | |
2280 | ifp->if_u1.if_data = | |
2281 | kmem_realloc(ifp->if_u1.if_data, | |
2282 | real_size, | |
2283 | ifp->if_real_bytes, | |
4a7edddc | 2284 | KM_SLEEP | KM_NOFS); |
1da177e4 LT |
2285 | } |
2286 | } else { | |
2287 | ASSERT(ifp->if_real_bytes == 0); | |
4a7edddc DC |
2288 | ifp->if_u1.if_data = kmem_alloc(real_size, |
2289 | KM_SLEEP | KM_NOFS); | |
1da177e4 LT |
2290 | memcpy(ifp->if_u1.if_data, ifp->if_u2.if_inline_data, |
2291 | ifp->if_bytes); | |
2292 | } | |
2293 | } | |
2294 | ifp->if_real_bytes = real_size; | |
2295 | ifp->if_bytes = new_size; | |
2296 | ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); | |
2297 | } | |
2298 | ||
1da177e4 LT |
2299 | void |
2300 | xfs_idestroy_fork( | |
2301 | xfs_inode_t *ip, | |
2302 | int whichfork) | |
2303 | { | |
2304 | xfs_ifork_t *ifp; | |
2305 | ||
2306 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
2307 | if (ifp->if_broot != NULL) { | |
f0e2d93c | 2308 | kmem_free(ifp->if_broot); |
1da177e4 LT |
2309 | ifp->if_broot = NULL; |
2310 | } | |
2311 | ||
2312 | /* | |
2313 | * If the format is local, then we can't have an extents | |
2314 | * array so just look for an inline data array. If we're | |
2315 | * not local then we may or may not have an extents list, | |
2316 | * so check and free it up if we do. | |
2317 | */ | |
2318 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
2319 | if ((ifp->if_u1.if_data != ifp->if_u2.if_inline_data) && | |
2320 | (ifp->if_u1.if_data != NULL)) { | |
2321 | ASSERT(ifp->if_real_bytes != 0); | |
f0e2d93c | 2322 | kmem_free(ifp->if_u1.if_data); |
1da177e4 LT |
2323 | ifp->if_u1.if_data = NULL; |
2324 | ifp->if_real_bytes = 0; | |
2325 | } | |
2326 | } else if ((ifp->if_flags & XFS_IFEXTENTS) && | |
0293ce3a MK |
2327 | ((ifp->if_flags & XFS_IFEXTIREC) || |
2328 | ((ifp->if_u1.if_extents != NULL) && | |
2329 | (ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext)))) { | |
1da177e4 | 2330 | ASSERT(ifp->if_real_bytes != 0); |
4eea22f0 | 2331 | xfs_iext_destroy(ifp); |
1da177e4 LT |
2332 | } |
2333 | ASSERT(ifp->if_u1.if_extents == NULL || | |
2334 | ifp->if_u1.if_extents == ifp->if_u2.if_inline_ext); | |
2335 | ASSERT(ifp->if_real_bytes == 0); | |
2336 | if (whichfork == XFS_ATTR_FORK) { | |
2337 | kmem_zone_free(xfs_ifork_zone, ip->i_afp); | |
2338 | ip->i_afp = NULL; | |
2339 | } | |
2340 | } | |
2341 | ||
1da177e4 | 2342 | /* |
60ec6783 CH |
2343 | * This is called to unpin an inode. The caller must have the inode locked |
2344 | * in at least shared mode so that the buffer cannot be subsequently pinned | |
2345 | * once someone is waiting for it to be unpinned. | |
1da177e4 | 2346 | */ |
60ec6783 | 2347 | static void |
f392e631 | 2348 | xfs_iunpin( |
60ec6783 | 2349 | struct xfs_inode *ip) |
1da177e4 | 2350 | { |
579aa9ca | 2351 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 | 2352 | |
4aaf15d1 DC |
2353 | trace_xfs_inode_unpin_nowait(ip, _RET_IP_); |
2354 | ||
a3f74ffb | 2355 | /* Give the log a push to start the unpinning I/O */ |
60ec6783 | 2356 | xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0); |
a14a348b | 2357 | |
a3f74ffb | 2358 | } |
1da177e4 | 2359 | |
f392e631 CH |
2360 | static void |
2361 | __xfs_iunpin_wait( | |
2362 | struct xfs_inode *ip) | |
2363 | { | |
2364 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IPINNED_BIT); | |
2365 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IPINNED_BIT); | |
2366 | ||
2367 | xfs_iunpin(ip); | |
2368 | ||
2369 | do { | |
2370 | prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
2371 | if (xfs_ipincount(ip)) | |
2372 | io_schedule(); | |
2373 | } while (xfs_ipincount(ip)); | |
2374 | finish_wait(wq, &wait.wait); | |
2375 | } | |
2376 | ||
777df5af | 2377 | void |
a3f74ffb | 2378 | xfs_iunpin_wait( |
60ec6783 | 2379 | struct xfs_inode *ip) |
a3f74ffb | 2380 | { |
f392e631 CH |
2381 | if (xfs_ipincount(ip)) |
2382 | __xfs_iunpin_wait(ip); | |
1da177e4 LT |
2383 | } |
2384 | ||
1da177e4 LT |
2385 | /* |
2386 | * xfs_iextents_copy() | |
2387 | * | |
2388 | * This is called to copy the REAL extents (as opposed to the delayed | |
2389 | * allocation extents) from the inode into the given buffer. It | |
2390 | * returns the number of bytes copied into the buffer. | |
2391 | * | |
2392 | * If there are no delayed allocation extents, then we can just | |
2393 | * memcpy() the extents into the buffer. Otherwise, we need to | |
2394 | * examine each extent in turn and skip those which are delayed. | |
2395 | */ | |
2396 | int | |
2397 | xfs_iextents_copy( | |
2398 | xfs_inode_t *ip, | |
a6f64d4a | 2399 | xfs_bmbt_rec_t *dp, |
1da177e4 LT |
2400 | int whichfork) |
2401 | { | |
2402 | int copied; | |
1da177e4 LT |
2403 | int i; |
2404 | xfs_ifork_t *ifp; | |
2405 | int nrecs; | |
2406 | xfs_fsblock_t start_block; | |
2407 | ||
2408 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
579aa9ca | 2409 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 LT |
2410 | ASSERT(ifp->if_bytes > 0); |
2411 | ||
2412 | nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3a59c94c | 2413 | XFS_BMAP_TRACE_EXLIST(ip, nrecs, whichfork); |
1da177e4 LT |
2414 | ASSERT(nrecs > 0); |
2415 | ||
2416 | /* | |
2417 | * There are some delayed allocation extents in the | |
2418 | * inode, so copy the extents one at a time and skip | |
2419 | * the delayed ones. There must be at least one | |
2420 | * non-delayed extent. | |
2421 | */ | |
1da177e4 LT |
2422 | copied = 0; |
2423 | for (i = 0; i < nrecs; i++) { | |
a6f64d4a | 2424 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
1da177e4 | 2425 | start_block = xfs_bmbt_get_startblock(ep); |
9d87c319 | 2426 | if (isnullstartblock(start_block)) { |
1da177e4 LT |
2427 | /* |
2428 | * It's a delayed allocation extent, so skip it. | |
2429 | */ | |
1da177e4 LT |
2430 | continue; |
2431 | } | |
2432 | ||
2433 | /* Translate to on disk format */ | |
cd8b0a97 CH |
2434 | put_unaligned(cpu_to_be64(ep->l0), &dp->l0); |
2435 | put_unaligned(cpu_to_be64(ep->l1), &dp->l1); | |
a6f64d4a | 2436 | dp++; |
1da177e4 LT |
2437 | copied++; |
2438 | } | |
2439 | ASSERT(copied != 0); | |
a6f64d4a | 2440 | xfs_validate_extents(ifp, copied, XFS_EXTFMT_INODE(ip)); |
1da177e4 LT |
2441 | |
2442 | return (copied * (uint)sizeof(xfs_bmbt_rec_t)); | |
2443 | } | |
2444 | ||
2445 | /* | |
2446 | * Each of the following cases stores data into the same region | |
2447 | * of the on-disk inode, so only one of them can be valid at | |
2448 | * any given time. While it is possible to have conflicting formats | |
2449 | * and log flags, e.g. having XFS_ILOG_?DATA set when the fork is | |
2450 | * in EXTENTS format, this can only happen when the fork has | |
2451 | * changed formats after being modified but before being flushed. | |
2452 | * In these cases, the format always takes precedence, because the | |
2453 | * format indicates the current state of the fork. | |
2454 | */ | |
2455 | /*ARGSUSED*/ | |
e4ac967b | 2456 | STATIC void |
1da177e4 LT |
2457 | xfs_iflush_fork( |
2458 | xfs_inode_t *ip, | |
2459 | xfs_dinode_t *dip, | |
2460 | xfs_inode_log_item_t *iip, | |
2461 | int whichfork, | |
2462 | xfs_buf_t *bp) | |
2463 | { | |
2464 | char *cp; | |
2465 | xfs_ifork_t *ifp; | |
2466 | xfs_mount_t *mp; | |
1da177e4 LT |
2467 | static const short brootflag[2] = |
2468 | { XFS_ILOG_DBROOT, XFS_ILOG_ABROOT }; | |
2469 | static const short dataflag[2] = | |
2470 | { XFS_ILOG_DDATA, XFS_ILOG_ADATA }; | |
2471 | static const short extflag[2] = | |
2472 | { XFS_ILOG_DEXT, XFS_ILOG_AEXT }; | |
2473 | ||
e4ac967b DC |
2474 | if (!iip) |
2475 | return; | |
1da177e4 LT |
2476 | ifp = XFS_IFORK_PTR(ip, whichfork); |
2477 | /* | |
2478 | * This can happen if we gave up in iformat in an error path, | |
2479 | * for the attribute fork. | |
2480 | */ | |
e4ac967b | 2481 | if (!ifp) { |
1da177e4 | 2482 | ASSERT(whichfork == XFS_ATTR_FORK); |
e4ac967b | 2483 | return; |
1da177e4 LT |
2484 | } |
2485 | cp = XFS_DFORK_PTR(dip, whichfork); | |
2486 | mp = ip->i_mount; | |
2487 | switch (XFS_IFORK_FORMAT(ip, whichfork)) { | |
2488 | case XFS_DINODE_FMT_LOCAL: | |
f5d8d5c4 | 2489 | if ((iip->ili_fields & dataflag[whichfork]) && |
1da177e4 LT |
2490 | (ifp->if_bytes > 0)) { |
2491 | ASSERT(ifp->if_u1.if_data != NULL); | |
2492 | ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); | |
2493 | memcpy(cp, ifp->if_u1.if_data, ifp->if_bytes); | |
2494 | } | |
1da177e4 LT |
2495 | break; |
2496 | ||
2497 | case XFS_DINODE_FMT_EXTENTS: | |
2498 | ASSERT((ifp->if_flags & XFS_IFEXTENTS) || | |
f5d8d5c4 CH |
2499 | !(iip->ili_fields & extflag[whichfork])); |
2500 | if ((iip->ili_fields & extflag[whichfork]) && | |
1da177e4 | 2501 | (ifp->if_bytes > 0)) { |
ab1908a5 | 2502 | ASSERT(xfs_iext_get_ext(ifp, 0)); |
1da177e4 LT |
2503 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0); |
2504 | (void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp, | |
2505 | whichfork); | |
2506 | } | |
2507 | break; | |
2508 | ||
2509 | case XFS_DINODE_FMT_BTREE: | |
f5d8d5c4 | 2510 | if ((iip->ili_fields & brootflag[whichfork]) && |
1da177e4 LT |
2511 | (ifp->if_broot_bytes > 0)) { |
2512 | ASSERT(ifp->if_broot != NULL); | |
2513 | ASSERT(ifp->if_broot_bytes <= | |
2514 | (XFS_IFORK_SIZE(ip, whichfork) + | |
ee1a47ab | 2515 | XFS_BROOT_SIZE_ADJ(ip))); |
60197e8d | 2516 | xfs_bmbt_to_bmdr(mp, ifp->if_broot, ifp->if_broot_bytes, |
1da177e4 LT |
2517 | (xfs_bmdr_block_t *)cp, |
2518 | XFS_DFORK_SIZE(dip, mp, whichfork)); | |
2519 | } | |
2520 | break; | |
2521 | ||
2522 | case XFS_DINODE_FMT_DEV: | |
f5d8d5c4 | 2523 | if (iip->ili_fields & XFS_ILOG_DEV) { |
1da177e4 | 2524 | ASSERT(whichfork == XFS_DATA_FORK); |
81591fe2 | 2525 | xfs_dinode_put_rdev(dip, ip->i_df.if_u2.if_rdev); |
1da177e4 LT |
2526 | } |
2527 | break; | |
2528 | ||
2529 | case XFS_DINODE_FMT_UUID: | |
f5d8d5c4 | 2530 | if (iip->ili_fields & XFS_ILOG_UUID) { |
1da177e4 | 2531 | ASSERT(whichfork == XFS_DATA_FORK); |
81591fe2 CH |
2532 | memcpy(XFS_DFORK_DPTR(dip), |
2533 | &ip->i_df.if_u2.if_uuid, | |
2534 | sizeof(uuid_t)); | |
1da177e4 LT |
2535 | } |
2536 | break; | |
2537 | ||
2538 | default: | |
2539 | ASSERT(0); | |
2540 | break; | |
2541 | } | |
1da177e4 LT |
2542 | } |
2543 | ||
bad55843 DC |
2544 | STATIC int |
2545 | xfs_iflush_cluster( | |
2546 | xfs_inode_t *ip, | |
2547 | xfs_buf_t *bp) | |
2548 | { | |
2549 | xfs_mount_t *mp = ip->i_mount; | |
5017e97d | 2550 | struct xfs_perag *pag; |
bad55843 | 2551 | unsigned long first_index, mask; |
c8f5f12e | 2552 | unsigned long inodes_per_cluster; |
bad55843 DC |
2553 | int ilist_size; |
2554 | xfs_inode_t **ilist; | |
2555 | xfs_inode_t *iq; | |
bad55843 DC |
2556 | int nr_found; |
2557 | int clcount = 0; | |
2558 | int bufwasdelwri; | |
2559 | int i; | |
2560 | ||
5017e97d | 2561 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); |
bad55843 | 2562 | |
c8f5f12e DC |
2563 | inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog; |
2564 | ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *); | |
49383b0e | 2565 | ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS); |
bad55843 | 2566 | if (!ilist) |
44b56e0a | 2567 | goto out_put; |
bad55843 DC |
2568 | |
2569 | mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); | |
2570 | first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; | |
1a3e8f3d | 2571 | rcu_read_lock(); |
bad55843 DC |
2572 | /* really need a gang lookup range call here */ |
2573 | nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, | |
c8f5f12e | 2574 | first_index, inodes_per_cluster); |
bad55843 DC |
2575 | if (nr_found == 0) |
2576 | goto out_free; | |
2577 | ||
2578 | for (i = 0; i < nr_found; i++) { | |
2579 | iq = ilist[i]; | |
2580 | if (iq == ip) | |
2581 | continue; | |
1a3e8f3d DC |
2582 | |
2583 | /* | |
2584 | * because this is an RCU protected lookup, we could find a | |
2585 | * recently freed or even reallocated inode during the lookup. | |
2586 | * We need to check under the i_flags_lock for a valid inode | |
2587 | * here. Skip it if it is not valid or the wrong inode. | |
2588 | */ | |
2589 | spin_lock(&ip->i_flags_lock); | |
2590 | if (!ip->i_ino || | |
2591 | (XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) { | |
2592 | spin_unlock(&ip->i_flags_lock); | |
2593 | continue; | |
2594 | } | |
2595 | spin_unlock(&ip->i_flags_lock); | |
2596 | ||
bad55843 DC |
2597 | /* |
2598 | * Do an un-protected check to see if the inode is dirty and | |
2599 | * is a candidate for flushing. These checks will be repeated | |
2600 | * later after the appropriate locks are acquired. | |
2601 | */ | |
33540408 | 2602 | if (xfs_inode_clean(iq) && xfs_ipincount(iq) == 0) |
bad55843 | 2603 | continue; |
bad55843 DC |
2604 | |
2605 | /* | |
2606 | * Try to get locks. If any are unavailable or it is pinned, | |
2607 | * then this inode cannot be flushed and is skipped. | |
2608 | */ | |
2609 | ||
2610 | if (!xfs_ilock_nowait(iq, XFS_ILOCK_SHARED)) | |
2611 | continue; | |
2612 | if (!xfs_iflock_nowait(iq)) { | |
2613 | xfs_iunlock(iq, XFS_ILOCK_SHARED); | |
2614 | continue; | |
2615 | } | |
2616 | if (xfs_ipincount(iq)) { | |
2617 | xfs_ifunlock(iq); | |
2618 | xfs_iunlock(iq, XFS_ILOCK_SHARED); | |
2619 | continue; | |
2620 | } | |
2621 | ||
2622 | /* | |
2623 | * arriving here means that this inode can be flushed. First | |
2624 | * re-check that it's dirty before flushing. | |
2625 | */ | |
33540408 DC |
2626 | if (!xfs_inode_clean(iq)) { |
2627 | int error; | |
bad55843 DC |
2628 | error = xfs_iflush_int(iq, bp); |
2629 | if (error) { | |
2630 | xfs_iunlock(iq, XFS_ILOCK_SHARED); | |
2631 | goto cluster_corrupt_out; | |
2632 | } | |
2633 | clcount++; | |
2634 | } else { | |
2635 | xfs_ifunlock(iq); | |
2636 | } | |
2637 | xfs_iunlock(iq, XFS_ILOCK_SHARED); | |
2638 | } | |
2639 | ||
2640 | if (clcount) { | |
2641 | XFS_STATS_INC(xs_icluster_flushcnt); | |
2642 | XFS_STATS_ADD(xs_icluster_flushinode, clcount); | |
2643 | } | |
2644 | ||
2645 | out_free: | |
1a3e8f3d | 2646 | rcu_read_unlock(); |
f0e2d93c | 2647 | kmem_free(ilist); |
44b56e0a DC |
2648 | out_put: |
2649 | xfs_perag_put(pag); | |
bad55843 DC |
2650 | return 0; |
2651 | ||
2652 | ||
2653 | cluster_corrupt_out: | |
2654 | /* | |
2655 | * Corruption detected in the clustering loop. Invalidate the | |
2656 | * inode buffer and shut down the filesystem. | |
2657 | */ | |
1a3e8f3d | 2658 | rcu_read_unlock(); |
bad55843 | 2659 | /* |
43ff2122 | 2660 | * Clean up the buffer. If it was delwri, just release it -- |
bad55843 DC |
2661 | * brelse can handle it with no problems. If not, shut down the |
2662 | * filesystem before releasing the buffer. | |
2663 | */ | |
43ff2122 | 2664 | bufwasdelwri = (bp->b_flags & _XBF_DELWRI_Q); |
bad55843 DC |
2665 | if (bufwasdelwri) |
2666 | xfs_buf_relse(bp); | |
2667 | ||
2668 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
2669 | ||
2670 | if (!bufwasdelwri) { | |
2671 | /* | |
2672 | * Just like incore_relse: if we have b_iodone functions, | |
2673 | * mark the buffer as an error and call them. Otherwise | |
2674 | * mark it as stale and brelse. | |
2675 | */ | |
cb669ca5 | 2676 | if (bp->b_iodone) { |
bad55843 | 2677 | XFS_BUF_UNDONE(bp); |
c867cb61 | 2678 | xfs_buf_stale(bp); |
5a52c2a5 | 2679 | xfs_buf_ioerror(bp, EIO); |
1a1a3e97 | 2680 | xfs_buf_ioend(bp, 0); |
bad55843 | 2681 | } else { |
c867cb61 | 2682 | xfs_buf_stale(bp); |
bad55843 DC |
2683 | xfs_buf_relse(bp); |
2684 | } | |
2685 | } | |
2686 | ||
2687 | /* | |
2688 | * Unlocks the flush lock | |
2689 | */ | |
04913fdd | 2690 | xfs_iflush_abort(iq, false); |
f0e2d93c | 2691 | kmem_free(ilist); |
44b56e0a | 2692 | xfs_perag_put(pag); |
bad55843 DC |
2693 | return XFS_ERROR(EFSCORRUPTED); |
2694 | } | |
2695 | ||
1da177e4 | 2696 | /* |
4c46819a CH |
2697 | * Flush dirty inode metadata into the backing buffer. |
2698 | * | |
2699 | * The caller must have the inode lock and the inode flush lock held. The | |
2700 | * inode lock will still be held upon return to the caller, and the inode | |
2701 | * flush lock will be released after the inode has reached the disk. | |
2702 | * | |
2703 | * The caller must write out the buffer returned in *bpp and release it. | |
1da177e4 LT |
2704 | */ |
2705 | int | |
2706 | xfs_iflush( | |
4c46819a CH |
2707 | struct xfs_inode *ip, |
2708 | struct xfs_buf **bpp) | |
1da177e4 | 2709 | { |
4c46819a CH |
2710 | struct xfs_mount *mp = ip->i_mount; |
2711 | struct xfs_buf *bp; | |
2712 | struct xfs_dinode *dip; | |
1da177e4 | 2713 | int error; |
1da177e4 LT |
2714 | |
2715 | XFS_STATS_INC(xs_iflush_count); | |
2716 | ||
579aa9ca | 2717 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 2718 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 2719 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 2720 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
1da177e4 | 2721 | |
4c46819a | 2722 | *bpp = NULL; |
1da177e4 | 2723 | |
1da177e4 LT |
2724 | xfs_iunpin_wait(ip); |
2725 | ||
4b6a4688 DC |
2726 | /* |
2727 | * For stale inodes we cannot rely on the backing buffer remaining | |
2728 | * stale in cache for the remaining life of the stale inode and so | |
475ee413 | 2729 | * xfs_imap_to_bp() below may give us a buffer that no longer contains |
4b6a4688 DC |
2730 | * inodes below. We have to check this after ensuring the inode is |
2731 | * unpinned so that it is safe to reclaim the stale inode after the | |
2732 | * flush call. | |
2733 | */ | |
2734 | if (xfs_iflags_test(ip, XFS_ISTALE)) { | |
2735 | xfs_ifunlock(ip); | |
2736 | return 0; | |
2737 | } | |
2738 | ||
1da177e4 LT |
2739 | /* |
2740 | * This may have been unpinned because the filesystem is shutting | |
2741 | * down forcibly. If that's the case we must not write this inode | |
32ce90a4 CH |
2742 | * to disk, because the log record didn't make it to disk. |
2743 | * | |
2744 | * We also have to remove the log item from the AIL in this case, | |
2745 | * as we wait for an empty AIL as part of the unmount process. | |
1da177e4 LT |
2746 | */ |
2747 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
32ce90a4 CH |
2748 | error = XFS_ERROR(EIO); |
2749 | goto abort_out; | |
1da177e4 LT |
2750 | } |
2751 | ||
a3f74ffb DC |
2752 | /* |
2753 | * Get the buffer containing the on-disk inode. | |
2754 | */ | |
475ee413 CH |
2755 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, XBF_TRYLOCK, |
2756 | 0); | |
a3f74ffb DC |
2757 | if (error || !bp) { |
2758 | xfs_ifunlock(ip); | |
2759 | return error; | |
2760 | } | |
2761 | ||
1da177e4 LT |
2762 | /* |
2763 | * First flush out the inode that xfs_iflush was called with. | |
2764 | */ | |
2765 | error = xfs_iflush_int(ip, bp); | |
bad55843 | 2766 | if (error) |
1da177e4 | 2767 | goto corrupt_out; |
1da177e4 | 2768 | |
a3f74ffb DC |
2769 | /* |
2770 | * If the buffer is pinned then push on the log now so we won't | |
2771 | * get stuck waiting in the write for too long. | |
2772 | */ | |
811e64c7 | 2773 | if (xfs_buf_ispinned(bp)) |
a14a348b | 2774 | xfs_log_force(mp, 0); |
a3f74ffb | 2775 | |
1da177e4 LT |
2776 | /* |
2777 | * inode clustering: | |
2778 | * see if other inodes can be gathered into this write | |
2779 | */ | |
bad55843 DC |
2780 | error = xfs_iflush_cluster(ip, bp); |
2781 | if (error) | |
2782 | goto cluster_corrupt_out; | |
1da177e4 | 2783 | |
4c46819a CH |
2784 | *bpp = bp; |
2785 | return 0; | |
1da177e4 LT |
2786 | |
2787 | corrupt_out: | |
2788 | xfs_buf_relse(bp); | |
7d04a335 | 2789 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
1da177e4 | 2790 | cluster_corrupt_out: |
32ce90a4 CH |
2791 | error = XFS_ERROR(EFSCORRUPTED); |
2792 | abort_out: | |
1da177e4 LT |
2793 | /* |
2794 | * Unlocks the flush lock | |
2795 | */ | |
04913fdd | 2796 | xfs_iflush_abort(ip, false); |
32ce90a4 | 2797 | return error; |
1da177e4 LT |
2798 | } |
2799 | ||
2800 | ||
2801 | STATIC int | |
2802 | xfs_iflush_int( | |
93848a99 CH |
2803 | struct xfs_inode *ip, |
2804 | struct xfs_buf *bp) | |
1da177e4 | 2805 | { |
93848a99 CH |
2806 | struct xfs_inode_log_item *iip = ip->i_itemp; |
2807 | struct xfs_dinode *dip; | |
2808 | struct xfs_mount *mp = ip->i_mount; | |
1da177e4 | 2809 | |
579aa9ca | 2810 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 2811 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 2812 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 2813 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
93848a99 | 2814 | ASSERT(iip != NULL && iip->ili_fields != 0); |
1da177e4 | 2815 | |
1da177e4 | 2816 | /* set *dip = inode's place in the buffer */ |
92bfc6e7 | 2817 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); |
1da177e4 | 2818 | |
69ef921b | 2819 | if (XFS_TEST_ERROR(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC), |
1da177e4 | 2820 | mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { |
6a19d939 DC |
2821 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
2822 | "%s: Bad inode %Lu magic number 0x%x, ptr 0x%p", | |
2823 | __func__, ip->i_ino, be16_to_cpu(dip->di_magic), dip); | |
1da177e4 LT |
2824 | goto corrupt_out; |
2825 | } | |
2826 | if (XFS_TEST_ERROR(ip->i_d.di_magic != XFS_DINODE_MAGIC, | |
2827 | mp, XFS_ERRTAG_IFLUSH_2, XFS_RANDOM_IFLUSH_2)) { | |
6a19d939 DC |
2828 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
2829 | "%s: Bad inode %Lu, ptr 0x%p, magic number 0x%x", | |
2830 | __func__, ip->i_ino, ip, ip->i_d.di_magic); | |
1da177e4 LT |
2831 | goto corrupt_out; |
2832 | } | |
abbede1b | 2833 | if (S_ISREG(ip->i_d.di_mode)) { |
1da177e4 LT |
2834 | if (XFS_TEST_ERROR( |
2835 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
2836 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE), | |
2837 | mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) { | |
6a19d939 DC |
2838 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
2839 | "%s: Bad regular inode %Lu, ptr 0x%p", | |
2840 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
2841 | goto corrupt_out; |
2842 | } | |
abbede1b | 2843 | } else if (S_ISDIR(ip->i_d.di_mode)) { |
1da177e4 LT |
2844 | if (XFS_TEST_ERROR( |
2845 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
2846 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
2847 | (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL), | |
2848 | mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) { | |
6a19d939 DC |
2849 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
2850 | "%s: Bad directory inode %Lu, ptr 0x%p", | |
2851 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
2852 | goto corrupt_out; |
2853 | } | |
2854 | } | |
2855 | if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents > | |
2856 | ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5, | |
2857 | XFS_RANDOM_IFLUSH_5)) { | |
6a19d939 DC |
2858 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
2859 | "%s: detected corrupt incore inode %Lu, " | |
2860 | "total extents = %d, nblocks = %Ld, ptr 0x%p", | |
2861 | __func__, ip->i_ino, | |
1da177e4 | 2862 | ip->i_d.di_nextents + ip->i_d.di_anextents, |
6a19d939 | 2863 | ip->i_d.di_nblocks, ip); |
1da177e4 LT |
2864 | goto corrupt_out; |
2865 | } | |
2866 | if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize, | |
2867 | mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) { | |
6a19d939 DC |
2868 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
2869 | "%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p", | |
2870 | __func__, ip->i_ino, ip->i_d.di_forkoff, ip); | |
1da177e4 LT |
2871 | goto corrupt_out; |
2872 | } | |
2873 | /* | |
2874 | * bump the flush iteration count, used to detect flushes which | |
93848a99 CH |
2875 | * postdate a log record during recovery. This is redundant as we now |
2876 | * log every change and hence this can't happen. Still, it doesn't hurt. | |
1da177e4 | 2877 | */ |
1da177e4 LT |
2878 | ip->i_d.di_flushiter++; |
2879 | ||
2880 | /* | |
2881 | * Copy the dirty parts of the inode into the on-disk | |
2882 | * inode. We always copy out the core of the inode, | |
2883 | * because if the inode is dirty at all the core must | |
2884 | * be. | |
2885 | */ | |
81591fe2 | 2886 | xfs_dinode_to_disk(dip, &ip->i_d); |
1da177e4 LT |
2887 | |
2888 | /* Wrap, we never let the log put out DI_MAX_FLUSH */ | |
2889 | if (ip->i_d.di_flushiter == DI_MAX_FLUSH) | |
2890 | ip->i_d.di_flushiter = 0; | |
2891 | ||
2892 | /* | |
2893 | * If this is really an old format inode and the superblock version | |
2894 | * has not been updated to support only new format inodes, then | |
2895 | * convert back to the old inode format. If the superblock version | |
2896 | * has been updated, then make the conversion permanent. | |
2897 | */ | |
51ce16d5 CH |
2898 | ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb)); |
2899 | if (ip->i_d.di_version == 1) { | |
62118709 | 2900 | if (!xfs_sb_version_hasnlink(&mp->m_sb)) { |
1da177e4 LT |
2901 | /* |
2902 | * Convert it back. | |
2903 | */ | |
2904 | ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1); | |
81591fe2 | 2905 | dip->di_onlink = cpu_to_be16(ip->i_d.di_nlink); |
1da177e4 LT |
2906 | } else { |
2907 | /* | |
2908 | * The superblock version has already been bumped, | |
2909 | * so just make the conversion to the new inode | |
2910 | * format permanent. | |
2911 | */ | |
51ce16d5 CH |
2912 | ip->i_d.di_version = 2; |
2913 | dip->di_version = 2; | |
1da177e4 | 2914 | ip->i_d.di_onlink = 0; |
81591fe2 | 2915 | dip->di_onlink = 0; |
1da177e4 | 2916 | memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); |
81591fe2 CH |
2917 | memset(&(dip->di_pad[0]), 0, |
2918 | sizeof(dip->di_pad)); | |
6743099c | 2919 | ASSERT(xfs_get_projid(ip) == 0); |
1da177e4 LT |
2920 | } |
2921 | } | |
2922 | ||
e4ac967b DC |
2923 | xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK, bp); |
2924 | if (XFS_IFORK_Q(ip)) | |
2925 | xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK, bp); | |
1da177e4 LT |
2926 | xfs_inobp_check(mp, bp); |
2927 | ||
2928 | /* | |
f5d8d5c4 CH |
2929 | * We've recorded everything logged in the inode, so we'd like to clear |
2930 | * the ili_fields bits so we don't log and flush things unnecessarily. | |
2931 | * However, we can't stop logging all this information until the data | |
2932 | * we've copied into the disk buffer is written to disk. If we did we | |
2933 | * might overwrite the copy of the inode in the log with all the data | |
2934 | * after re-logging only part of it, and in the face of a crash we | |
2935 | * wouldn't have all the data we need to recover. | |
1da177e4 | 2936 | * |
f5d8d5c4 CH |
2937 | * What we do is move the bits to the ili_last_fields field. When |
2938 | * logging the inode, these bits are moved back to the ili_fields field. | |
2939 | * In the xfs_iflush_done() routine we clear ili_last_fields, since we | |
2940 | * know that the information those bits represent is permanently on | |
2941 | * disk. As long as the flush completes before the inode is logged | |
2942 | * again, then both ili_fields and ili_last_fields will be cleared. | |
1da177e4 | 2943 | * |
f5d8d5c4 CH |
2944 | * We can play with the ili_fields bits here, because the inode lock |
2945 | * must be held exclusively in order to set bits there and the flush | |
2946 | * lock protects the ili_last_fields bits. Set ili_logged so the flush | |
2947 | * done routine can tell whether or not to look in the AIL. Also, store | |
2948 | * the current LSN of the inode so that we can tell whether the item has | |
2949 | * moved in the AIL from xfs_iflush_done(). In order to read the lsn we | |
2950 | * need the AIL lock, because it is a 64 bit value that cannot be read | |
2951 | * atomically. | |
1da177e4 | 2952 | */ |
93848a99 CH |
2953 | iip->ili_last_fields = iip->ili_fields; |
2954 | iip->ili_fields = 0; | |
2955 | iip->ili_logged = 1; | |
1da177e4 | 2956 | |
93848a99 CH |
2957 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
2958 | &iip->ili_item.li_lsn); | |
1da177e4 | 2959 | |
93848a99 CH |
2960 | /* |
2961 | * Attach the function xfs_iflush_done to the inode's | |
2962 | * buffer. This will remove the inode from the AIL | |
2963 | * and unlock the inode's flush lock when the inode is | |
2964 | * completely written to disk. | |
2965 | */ | |
2966 | xfs_buf_attach_iodone(bp, xfs_iflush_done, &iip->ili_item); | |
1da177e4 | 2967 | |
93848a99 CH |
2968 | /* update the lsn in the on disk inode if required */ |
2969 | if (ip->i_d.di_version == 3) | |
2970 | dip->di_lsn = cpu_to_be64(iip->ili_item.li_lsn); | |
2971 | ||
2972 | /* generate the checksum. */ | |
2973 | xfs_dinode_calc_crc(mp, dip); | |
1da177e4 | 2974 | |
93848a99 CH |
2975 | ASSERT(bp->b_fspriv != NULL); |
2976 | ASSERT(bp->b_iodone != NULL); | |
1da177e4 LT |
2977 | return 0; |
2978 | ||
2979 | corrupt_out: | |
2980 | return XFS_ERROR(EFSCORRUPTED); | |
2981 | } | |
2982 | ||
4eea22f0 MK |
2983 | /* |
2984 | * Return a pointer to the extent record at file index idx. | |
2985 | */ | |
a6f64d4a | 2986 | xfs_bmbt_rec_host_t * |
4eea22f0 MK |
2987 | xfs_iext_get_ext( |
2988 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
2989 | xfs_extnum_t idx) /* index of target extent */ | |
2990 | { | |
2991 | ASSERT(idx >= 0); | |
87bef181 CH |
2992 | ASSERT(idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)); |
2993 | ||
0293ce3a MK |
2994 | if ((ifp->if_flags & XFS_IFEXTIREC) && (idx == 0)) { |
2995 | return ifp->if_u1.if_ext_irec->er_extbuf; | |
2996 | } else if (ifp->if_flags & XFS_IFEXTIREC) { | |
2997 | xfs_ext_irec_t *erp; /* irec pointer */ | |
2998 | int erp_idx = 0; /* irec index */ | |
2999 | xfs_extnum_t page_idx = idx; /* ext index in target list */ | |
3000 | ||
3001 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0); | |
3002 | return &erp->er_extbuf[page_idx]; | |
3003 | } else if (ifp->if_bytes) { | |
4eea22f0 MK |
3004 | return &ifp->if_u1.if_extents[idx]; |
3005 | } else { | |
3006 | return NULL; | |
3007 | } | |
3008 | } | |
3009 | ||
3010 | /* | |
3011 | * Insert new item(s) into the extent records for incore inode | |
3012 | * fork 'ifp'. 'count' new items are inserted at index 'idx'. | |
3013 | */ | |
3014 | void | |
3015 | xfs_iext_insert( | |
6ef35544 | 3016 | xfs_inode_t *ip, /* incore inode pointer */ |
4eea22f0 MK |
3017 | xfs_extnum_t idx, /* starting index of new items */ |
3018 | xfs_extnum_t count, /* number of inserted items */ | |
6ef35544 CH |
3019 | xfs_bmbt_irec_t *new, /* items to insert */ |
3020 | int state) /* type of extent conversion */ | |
4eea22f0 | 3021 | { |
6ef35544 | 3022 | xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df; |
4eea22f0 MK |
3023 | xfs_extnum_t i; /* extent record index */ |
3024 | ||
0b1b213f CH |
3025 | trace_xfs_iext_insert(ip, idx, new, state, _RET_IP_); |
3026 | ||
4eea22f0 MK |
3027 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
3028 | xfs_iext_add(ifp, idx, count); | |
a6f64d4a CH |
3029 | for (i = idx; i < idx + count; i++, new++) |
3030 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, i), new); | |
4eea22f0 MK |
3031 | } |
3032 | ||
3033 | /* | |
3034 | * This is called when the amount of space required for incore file | |
3035 | * extents needs to be increased. The ext_diff parameter stores the | |
3036 | * number of new extents being added and the idx parameter contains | |
3037 | * the extent index where the new extents will be added. If the new | |
3038 | * extents are being appended, then we just need to (re)allocate and | |
3039 | * initialize the space. Otherwise, if the new extents are being | |
3040 | * inserted into the middle of the existing entries, a bit more work | |
3041 | * is required to make room for the new extents to be inserted. The | |
3042 | * caller is responsible for filling in the new extent entries upon | |
3043 | * return. | |
3044 | */ | |
3045 | void | |
3046 | xfs_iext_add( | |
3047 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3048 | xfs_extnum_t idx, /* index to begin adding exts */ | |
c41564b5 | 3049 | int ext_diff) /* number of extents to add */ |
4eea22f0 MK |
3050 | { |
3051 | int byte_diff; /* new bytes being added */ | |
3052 | int new_size; /* size of extents after adding */ | |
3053 | xfs_extnum_t nextents; /* number of extents in file */ | |
3054 | ||
3055 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3056 | ASSERT((idx >= 0) && (idx <= nextents)); | |
3057 | byte_diff = ext_diff * sizeof(xfs_bmbt_rec_t); | |
3058 | new_size = ifp->if_bytes + byte_diff; | |
3059 | /* | |
3060 | * If the new number of extents (nextents + ext_diff) | |
3061 | * fits inside the inode, then continue to use the inline | |
3062 | * extent buffer. | |
3063 | */ | |
3064 | if (nextents + ext_diff <= XFS_INLINE_EXTS) { | |
3065 | if (idx < nextents) { | |
3066 | memmove(&ifp->if_u2.if_inline_ext[idx + ext_diff], | |
3067 | &ifp->if_u2.if_inline_ext[idx], | |
3068 | (nextents - idx) * sizeof(xfs_bmbt_rec_t)); | |
3069 | memset(&ifp->if_u2.if_inline_ext[idx], 0, byte_diff); | |
3070 | } | |
3071 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; | |
3072 | ifp->if_real_bytes = 0; | |
3073 | } | |
3074 | /* | |
3075 | * Otherwise use a linear (direct) extent list. | |
3076 | * If the extents are currently inside the inode, | |
3077 | * xfs_iext_realloc_direct will switch us from | |
3078 | * inline to direct extent allocation mode. | |
3079 | */ | |
0293ce3a | 3080 | else if (nextents + ext_diff <= XFS_LINEAR_EXTS) { |
4eea22f0 MK |
3081 | xfs_iext_realloc_direct(ifp, new_size); |
3082 | if (idx < nextents) { | |
3083 | memmove(&ifp->if_u1.if_extents[idx + ext_diff], | |
3084 | &ifp->if_u1.if_extents[idx], | |
3085 | (nextents - idx) * sizeof(xfs_bmbt_rec_t)); | |
3086 | memset(&ifp->if_u1.if_extents[idx], 0, byte_diff); | |
3087 | } | |
3088 | } | |
0293ce3a MK |
3089 | /* Indirection array */ |
3090 | else { | |
3091 | xfs_ext_irec_t *erp; | |
3092 | int erp_idx = 0; | |
3093 | int page_idx = idx; | |
3094 | ||
3095 | ASSERT(nextents + ext_diff > XFS_LINEAR_EXTS); | |
3096 | if (ifp->if_flags & XFS_IFEXTIREC) { | |
3097 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 1); | |
3098 | } else { | |
3099 | xfs_iext_irec_init(ifp); | |
3100 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3101 | erp = ifp->if_u1.if_ext_irec; | |
3102 | } | |
3103 | /* Extents fit in target extent page */ | |
3104 | if (erp && erp->er_extcount + ext_diff <= XFS_LINEAR_EXTS) { | |
3105 | if (page_idx < erp->er_extcount) { | |
3106 | memmove(&erp->er_extbuf[page_idx + ext_diff], | |
3107 | &erp->er_extbuf[page_idx], | |
3108 | (erp->er_extcount - page_idx) * | |
3109 | sizeof(xfs_bmbt_rec_t)); | |
3110 | memset(&erp->er_extbuf[page_idx], 0, byte_diff); | |
3111 | } | |
3112 | erp->er_extcount += ext_diff; | |
3113 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); | |
3114 | } | |
3115 | /* Insert a new extent page */ | |
3116 | else if (erp) { | |
3117 | xfs_iext_add_indirect_multi(ifp, | |
3118 | erp_idx, page_idx, ext_diff); | |
3119 | } | |
3120 | /* | |
3121 | * If extent(s) are being appended to the last page in | |
3122 | * the indirection array and the new extent(s) don't fit | |
3123 | * in the page, then erp is NULL and erp_idx is set to | |
3124 | * the next index needed in the indirection array. | |
3125 | */ | |
3126 | else { | |
3127 | int count = ext_diff; | |
3128 | ||
3129 | while (count) { | |
3130 | erp = xfs_iext_irec_new(ifp, erp_idx); | |
3131 | erp->er_extcount = count; | |
3132 | count -= MIN(count, (int)XFS_LINEAR_EXTS); | |
3133 | if (count) { | |
3134 | erp_idx++; | |
3135 | } | |
3136 | } | |
3137 | } | |
3138 | } | |
4eea22f0 MK |
3139 | ifp->if_bytes = new_size; |
3140 | } | |
3141 | ||
0293ce3a MK |
3142 | /* |
3143 | * This is called when incore extents are being added to the indirection | |
3144 | * array and the new extents do not fit in the target extent list. The | |
3145 | * erp_idx parameter contains the irec index for the target extent list | |
3146 | * in the indirection array, and the idx parameter contains the extent | |
3147 | * index within the list. The number of extents being added is stored | |
3148 | * in the count parameter. | |
3149 | * | |
3150 | * |-------| |-------| | |
3151 | * | | | | idx - number of extents before idx | |
3152 | * | idx | | count | | |
3153 | * | | | | count - number of extents being inserted at idx | |
3154 | * |-------| |-------| | |
3155 | * | count | | nex2 | nex2 - number of extents after idx + count | |
3156 | * |-------| |-------| | |
3157 | */ | |
3158 | void | |
3159 | xfs_iext_add_indirect_multi( | |
3160 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3161 | int erp_idx, /* target extent irec index */ | |
3162 | xfs_extnum_t idx, /* index within target list */ | |
3163 | int count) /* new extents being added */ | |
3164 | { | |
3165 | int byte_diff; /* new bytes being added */ | |
3166 | xfs_ext_irec_t *erp; /* pointer to irec entry */ | |
3167 | xfs_extnum_t ext_diff; /* number of extents to add */ | |
3168 | xfs_extnum_t ext_cnt; /* new extents still needed */ | |
3169 | xfs_extnum_t nex2; /* extents after idx + count */ | |
3170 | xfs_bmbt_rec_t *nex2_ep = NULL; /* temp list for nex2 extents */ | |
3171 | int nlists; /* number of irec's (lists) */ | |
3172 | ||
3173 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3174 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; | |
3175 | nex2 = erp->er_extcount - idx; | |
3176 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3177 | ||
3178 | /* | |
3179 | * Save second part of target extent list | |
3180 | * (all extents past */ | |
3181 | if (nex2) { | |
3182 | byte_diff = nex2 * sizeof(xfs_bmbt_rec_t); | |
6785073b | 3183 | nex2_ep = (xfs_bmbt_rec_t *) kmem_alloc(byte_diff, KM_NOFS); |
0293ce3a MK |
3184 | memmove(nex2_ep, &erp->er_extbuf[idx], byte_diff); |
3185 | erp->er_extcount -= nex2; | |
3186 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -nex2); | |
3187 | memset(&erp->er_extbuf[idx], 0, byte_diff); | |
3188 | } | |
3189 | ||
3190 | /* | |
3191 | * Add the new extents to the end of the target | |
3192 | * list, then allocate new irec record(s) and | |
3193 | * extent buffer(s) as needed to store the rest | |
3194 | * of the new extents. | |
3195 | */ | |
3196 | ext_cnt = count; | |
3197 | ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS - erp->er_extcount); | |
3198 | if (ext_diff) { | |
3199 | erp->er_extcount += ext_diff; | |
3200 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); | |
3201 | ext_cnt -= ext_diff; | |
3202 | } | |
3203 | while (ext_cnt) { | |
3204 | erp_idx++; | |
3205 | erp = xfs_iext_irec_new(ifp, erp_idx); | |
3206 | ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS); | |
3207 | erp->er_extcount = ext_diff; | |
3208 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); | |
3209 | ext_cnt -= ext_diff; | |
3210 | } | |
3211 | ||
3212 | /* Add nex2 extents back to indirection array */ | |
3213 | if (nex2) { | |
3214 | xfs_extnum_t ext_avail; | |
3215 | int i; | |
3216 | ||
3217 | byte_diff = nex2 * sizeof(xfs_bmbt_rec_t); | |
3218 | ext_avail = XFS_LINEAR_EXTS - erp->er_extcount; | |
3219 | i = 0; | |
3220 | /* | |
3221 | * If nex2 extents fit in the current page, append | |
3222 | * nex2_ep after the new extents. | |
3223 | */ | |
3224 | if (nex2 <= ext_avail) { | |
3225 | i = erp->er_extcount; | |
3226 | } | |
3227 | /* | |
3228 | * Otherwise, check if space is available in the | |
3229 | * next page. | |
3230 | */ | |
3231 | else if ((erp_idx < nlists - 1) && | |
3232 | (nex2 <= (ext_avail = XFS_LINEAR_EXTS - | |
3233 | ifp->if_u1.if_ext_irec[erp_idx+1].er_extcount))) { | |
3234 | erp_idx++; | |
3235 | erp++; | |
3236 | /* Create a hole for nex2 extents */ | |
3237 | memmove(&erp->er_extbuf[nex2], erp->er_extbuf, | |
3238 | erp->er_extcount * sizeof(xfs_bmbt_rec_t)); | |
3239 | } | |
3240 | /* | |
3241 | * Final choice, create a new extent page for | |
3242 | * nex2 extents. | |
3243 | */ | |
3244 | else { | |
3245 | erp_idx++; | |
3246 | erp = xfs_iext_irec_new(ifp, erp_idx); | |
3247 | } | |
3248 | memmove(&erp->er_extbuf[i], nex2_ep, byte_diff); | |
f0e2d93c | 3249 | kmem_free(nex2_ep); |
0293ce3a MK |
3250 | erp->er_extcount += nex2; |
3251 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, nex2); | |
3252 | } | |
3253 | } | |
3254 | ||
4eea22f0 MK |
3255 | /* |
3256 | * This is called when the amount of space required for incore file | |
3257 | * extents needs to be decreased. The ext_diff parameter stores the | |
3258 | * number of extents to be removed and the idx parameter contains | |
3259 | * the extent index where the extents will be removed from. | |
0293ce3a MK |
3260 | * |
3261 | * If the amount of space needed has decreased below the linear | |
3262 | * limit, XFS_IEXT_BUFSZ, then switch to using the contiguous | |
3263 | * extent array. Otherwise, use kmem_realloc() to adjust the | |
3264 | * size to what is needed. | |
4eea22f0 MK |
3265 | */ |
3266 | void | |
3267 | xfs_iext_remove( | |
6ef35544 | 3268 | xfs_inode_t *ip, /* incore inode pointer */ |
4eea22f0 | 3269 | xfs_extnum_t idx, /* index to begin removing exts */ |
6ef35544 CH |
3270 | int ext_diff, /* number of extents to remove */ |
3271 | int state) /* type of extent conversion */ | |
4eea22f0 | 3272 | { |
6ef35544 | 3273 | xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df; |
4eea22f0 MK |
3274 | xfs_extnum_t nextents; /* number of extents in file */ |
3275 | int new_size; /* size of extents after removal */ | |
3276 | ||
0b1b213f CH |
3277 | trace_xfs_iext_remove(ip, idx, state, _RET_IP_); |
3278 | ||
4eea22f0 MK |
3279 | ASSERT(ext_diff > 0); |
3280 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3281 | new_size = (nextents - ext_diff) * sizeof(xfs_bmbt_rec_t); | |
3282 | ||
3283 | if (new_size == 0) { | |
3284 | xfs_iext_destroy(ifp); | |
0293ce3a MK |
3285 | } else if (ifp->if_flags & XFS_IFEXTIREC) { |
3286 | xfs_iext_remove_indirect(ifp, idx, ext_diff); | |
4eea22f0 MK |
3287 | } else if (ifp->if_real_bytes) { |
3288 | xfs_iext_remove_direct(ifp, idx, ext_diff); | |
3289 | } else { | |
3290 | xfs_iext_remove_inline(ifp, idx, ext_diff); | |
3291 | } | |
3292 | ifp->if_bytes = new_size; | |
3293 | } | |
3294 | ||
3295 | /* | |
3296 | * This removes ext_diff extents from the inline buffer, beginning | |
3297 | * at extent index idx. | |
3298 | */ | |
3299 | void | |
3300 | xfs_iext_remove_inline( | |
3301 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3302 | xfs_extnum_t idx, /* index to begin removing exts */ | |
3303 | int ext_diff) /* number of extents to remove */ | |
3304 | { | |
3305 | int nextents; /* number of extents in file */ | |
3306 | ||
0293ce3a | 3307 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
4eea22f0 MK |
3308 | ASSERT(idx < XFS_INLINE_EXTS); |
3309 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3310 | ASSERT(((nextents - ext_diff) > 0) && | |
3311 | (nextents - ext_diff) < XFS_INLINE_EXTS); | |
3312 | ||
3313 | if (idx + ext_diff < nextents) { | |
3314 | memmove(&ifp->if_u2.if_inline_ext[idx], | |
3315 | &ifp->if_u2.if_inline_ext[idx + ext_diff], | |
3316 | (nextents - (idx + ext_diff)) * | |
3317 | sizeof(xfs_bmbt_rec_t)); | |
3318 | memset(&ifp->if_u2.if_inline_ext[nextents - ext_diff], | |
3319 | 0, ext_diff * sizeof(xfs_bmbt_rec_t)); | |
3320 | } else { | |
3321 | memset(&ifp->if_u2.if_inline_ext[idx], 0, | |
3322 | ext_diff * sizeof(xfs_bmbt_rec_t)); | |
3323 | } | |
3324 | } | |
3325 | ||
3326 | /* | |
3327 | * This removes ext_diff extents from a linear (direct) extent list, | |
3328 | * beginning at extent index idx. If the extents are being removed | |
3329 | * from the end of the list (ie. truncate) then we just need to re- | |
3330 | * allocate the list to remove the extra space. Otherwise, if the | |
3331 | * extents are being removed from the middle of the existing extent | |
3332 | * entries, then we first need to move the extent records beginning | |
3333 | * at idx + ext_diff up in the list to overwrite the records being | |
3334 | * removed, then remove the extra space via kmem_realloc. | |
3335 | */ | |
3336 | void | |
3337 | xfs_iext_remove_direct( | |
3338 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3339 | xfs_extnum_t idx, /* index to begin removing exts */ | |
3340 | int ext_diff) /* number of extents to remove */ | |
3341 | { | |
3342 | xfs_extnum_t nextents; /* number of extents in file */ | |
3343 | int new_size; /* size of extents after removal */ | |
3344 | ||
0293ce3a | 3345 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
4eea22f0 MK |
3346 | new_size = ifp->if_bytes - |
3347 | (ext_diff * sizeof(xfs_bmbt_rec_t)); | |
3348 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3349 | ||
3350 | if (new_size == 0) { | |
3351 | xfs_iext_destroy(ifp); | |
3352 | return; | |
3353 | } | |
3354 | /* Move extents up in the list (if needed) */ | |
3355 | if (idx + ext_diff < nextents) { | |
3356 | memmove(&ifp->if_u1.if_extents[idx], | |
3357 | &ifp->if_u1.if_extents[idx + ext_diff], | |
3358 | (nextents - (idx + ext_diff)) * | |
3359 | sizeof(xfs_bmbt_rec_t)); | |
3360 | } | |
3361 | memset(&ifp->if_u1.if_extents[nextents - ext_diff], | |
3362 | 0, ext_diff * sizeof(xfs_bmbt_rec_t)); | |
3363 | /* | |
3364 | * Reallocate the direct extent list. If the extents | |
3365 | * will fit inside the inode then xfs_iext_realloc_direct | |
3366 | * will switch from direct to inline extent allocation | |
3367 | * mode for us. | |
3368 | */ | |
3369 | xfs_iext_realloc_direct(ifp, new_size); | |
3370 | ifp->if_bytes = new_size; | |
3371 | } | |
3372 | ||
0293ce3a MK |
3373 | /* |
3374 | * This is called when incore extents are being removed from the | |
3375 | * indirection array and the extents being removed span multiple extent | |
3376 | * buffers. The idx parameter contains the file extent index where we | |
3377 | * want to begin removing extents, and the count parameter contains | |
3378 | * how many extents need to be removed. | |
3379 | * | |
3380 | * |-------| |-------| | |
3381 | * | nex1 | | | nex1 - number of extents before idx | |
3382 | * |-------| | count | | |
3383 | * | | | | count - number of extents being removed at idx | |
3384 | * | count | |-------| | |
3385 | * | | | nex2 | nex2 - number of extents after idx + count | |
3386 | * |-------| |-------| | |
3387 | */ | |
3388 | void | |
3389 | xfs_iext_remove_indirect( | |
3390 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3391 | xfs_extnum_t idx, /* index to begin removing extents */ | |
3392 | int count) /* number of extents to remove */ | |
3393 | { | |
3394 | xfs_ext_irec_t *erp; /* indirection array pointer */ | |
3395 | int erp_idx = 0; /* indirection array index */ | |
3396 | xfs_extnum_t ext_cnt; /* extents left to remove */ | |
3397 | xfs_extnum_t ext_diff; /* extents to remove in current list */ | |
3398 | xfs_extnum_t nex1; /* number of extents before idx */ | |
3399 | xfs_extnum_t nex2; /* extents after idx + count */ | |
0293ce3a MK |
3400 | int page_idx = idx; /* index in target extent list */ |
3401 | ||
3402 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3403 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0); | |
3404 | ASSERT(erp != NULL); | |
0293ce3a MK |
3405 | nex1 = page_idx; |
3406 | ext_cnt = count; | |
3407 | while (ext_cnt) { | |
3408 | nex2 = MAX((erp->er_extcount - (nex1 + ext_cnt)), 0); | |
3409 | ext_diff = MIN(ext_cnt, (erp->er_extcount - nex1)); | |
3410 | /* | |
3411 | * Check for deletion of entire list; | |
3412 | * xfs_iext_irec_remove() updates extent offsets. | |
3413 | */ | |
3414 | if (ext_diff == erp->er_extcount) { | |
3415 | xfs_iext_irec_remove(ifp, erp_idx); | |
3416 | ext_cnt -= ext_diff; | |
3417 | nex1 = 0; | |
3418 | if (ext_cnt) { | |
3419 | ASSERT(erp_idx < ifp->if_real_bytes / | |
3420 | XFS_IEXT_BUFSZ); | |
3421 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; | |
3422 | nex1 = 0; | |
3423 | continue; | |
3424 | } else { | |
3425 | break; | |
3426 | } | |
3427 | } | |
3428 | /* Move extents up (if needed) */ | |
3429 | if (nex2) { | |
3430 | memmove(&erp->er_extbuf[nex1], | |
3431 | &erp->er_extbuf[nex1 + ext_diff], | |
3432 | nex2 * sizeof(xfs_bmbt_rec_t)); | |
3433 | } | |
3434 | /* Zero out rest of page */ | |
3435 | memset(&erp->er_extbuf[nex1 + nex2], 0, (XFS_IEXT_BUFSZ - | |
3436 | ((nex1 + nex2) * sizeof(xfs_bmbt_rec_t)))); | |
3437 | /* Update remaining counters */ | |
3438 | erp->er_extcount -= ext_diff; | |
3439 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -ext_diff); | |
3440 | ext_cnt -= ext_diff; | |
3441 | nex1 = 0; | |
3442 | erp_idx++; | |
3443 | erp++; | |
3444 | } | |
3445 | ifp->if_bytes -= count * sizeof(xfs_bmbt_rec_t); | |
3446 | xfs_iext_irec_compact(ifp); | |
3447 | } | |
3448 | ||
4eea22f0 MK |
3449 | /* |
3450 | * Create, destroy, or resize a linear (direct) block of extents. | |
3451 | */ | |
3452 | void | |
3453 | xfs_iext_realloc_direct( | |
3454 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3455 | int new_size) /* new size of extents */ | |
3456 | { | |
3457 | int rnew_size; /* real new size of extents */ | |
3458 | ||
3459 | rnew_size = new_size; | |
3460 | ||
0293ce3a MK |
3461 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC) || |
3462 | ((new_size >= 0) && (new_size <= XFS_IEXT_BUFSZ) && | |
3463 | (new_size != ifp->if_real_bytes))); | |
3464 | ||
4eea22f0 MK |
3465 | /* Free extent records */ |
3466 | if (new_size == 0) { | |
3467 | xfs_iext_destroy(ifp); | |
3468 | } | |
3469 | /* Resize direct extent list and zero any new bytes */ | |
3470 | else if (ifp->if_real_bytes) { | |
3471 | /* Check if extents will fit inside the inode */ | |
3472 | if (new_size <= XFS_INLINE_EXTS * sizeof(xfs_bmbt_rec_t)) { | |
3473 | xfs_iext_direct_to_inline(ifp, new_size / | |
3474 | (uint)sizeof(xfs_bmbt_rec_t)); | |
3475 | ifp->if_bytes = new_size; | |
3476 | return; | |
3477 | } | |
16a087d8 | 3478 | if (!is_power_of_2(new_size)){ |
40ebd81d | 3479 | rnew_size = roundup_pow_of_two(new_size); |
4eea22f0 MK |
3480 | } |
3481 | if (rnew_size != ifp->if_real_bytes) { | |
a6f64d4a | 3482 | ifp->if_u1.if_extents = |
4eea22f0 MK |
3483 | kmem_realloc(ifp->if_u1.if_extents, |
3484 | rnew_size, | |
6785073b | 3485 | ifp->if_real_bytes, KM_NOFS); |
4eea22f0 MK |
3486 | } |
3487 | if (rnew_size > ifp->if_real_bytes) { | |
3488 | memset(&ifp->if_u1.if_extents[ifp->if_bytes / | |
3489 | (uint)sizeof(xfs_bmbt_rec_t)], 0, | |
3490 | rnew_size - ifp->if_real_bytes); | |
3491 | } | |
3492 | } | |
3493 | /* | |
3494 | * Switch from the inline extent buffer to a direct | |
3495 | * extent list. Be sure to include the inline extent | |
3496 | * bytes in new_size. | |
3497 | */ | |
3498 | else { | |
3499 | new_size += ifp->if_bytes; | |
16a087d8 | 3500 | if (!is_power_of_2(new_size)) { |
40ebd81d | 3501 | rnew_size = roundup_pow_of_two(new_size); |
4eea22f0 MK |
3502 | } |
3503 | xfs_iext_inline_to_direct(ifp, rnew_size); | |
3504 | } | |
3505 | ifp->if_real_bytes = rnew_size; | |
3506 | ifp->if_bytes = new_size; | |
3507 | } | |
3508 | ||
3509 | /* | |
3510 | * Switch from linear (direct) extent records to inline buffer. | |
3511 | */ | |
3512 | void | |
3513 | xfs_iext_direct_to_inline( | |
3514 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3515 | xfs_extnum_t nextents) /* number of extents in file */ | |
3516 | { | |
3517 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
3518 | ASSERT(nextents <= XFS_INLINE_EXTS); | |
3519 | /* | |
3520 | * The inline buffer was zeroed when we switched | |
3521 | * from inline to direct extent allocation mode, | |
3522 | * so we don't need to clear it here. | |
3523 | */ | |
3524 | memcpy(ifp->if_u2.if_inline_ext, ifp->if_u1.if_extents, | |
3525 | nextents * sizeof(xfs_bmbt_rec_t)); | |
f0e2d93c | 3526 | kmem_free(ifp->if_u1.if_extents); |
4eea22f0 MK |
3527 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
3528 | ifp->if_real_bytes = 0; | |
3529 | } | |
3530 | ||
3531 | /* | |
3532 | * Switch from inline buffer to linear (direct) extent records. | |
3533 | * new_size should already be rounded up to the next power of 2 | |
3534 | * by the caller (when appropriate), so use new_size as it is. | |
3535 | * However, since new_size may be rounded up, we can't update | |
3536 | * if_bytes here. It is the caller's responsibility to update | |
3537 | * if_bytes upon return. | |
3538 | */ | |
3539 | void | |
3540 | xfs_iext_inline_to_direct( | |
3541 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3542 | int new_size) /* number of extents in file */ | |
3543 | { | |
6785073b | 3544 | ifp->if_u1.if_extents = kmem_alloc(new_size, KM_NOFS); |
4eea22f0 MK |
3545 | memset(ifp->if_u1.if_extents, 0, new_size); |
3546 | if (ifp->if_bytes) { | |
3547 | memcpy(ifp->if_u1.if_extents, ifp->if_u2.if_inline_ext, | |
3548 | ifp->if_bytes); | |
3549 | memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS * | |
3550 | sizeof(xfs_bmbt_rec_t)); | |
3551 | } | |
3552 | ifp->if_real_bytes = new_size; | |
3553 | } | |
3554 | ||
0293ce3a MK |
3555 | /* |
3556 | * Resize an extent indirection array to new_size bytes. | |
3557 | */ | |
d96f8f89 | 3558 | STATIC void |
0293ce3a MK |
3559 | xfs_iext_realloc_indirect( |
3560 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3561 | int new_size) /* new indirection array size */ | |
3562 | { | |
3563 | int nlists; /* number of irec's (ex lists) */ | |
3564 | int size; /* current indirection array size */ | |
3565 | ||
3566 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3567 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3568 | size = nlists * sizeof(xfs_ext_irec_t); | |
3569 | ASSERT(ifp->if_real_bytes); | |
3570 | ASSERT((new_size >= 0) && (new_size != size)); | |
3571 | if (new_size == 0) { | |
3572 | xfs_iext_destroy(ifp); | |
3573 | } else { | |
3574 | ifp->if_u1.if_ext_irec = (xfs_ext_irec_t *) | |
3575 | kmem_realloc(ifp->if_u1.if_ext_irec, | |
6785073b | 3576 | new_size, size, KM_NOFS); |
0293ce3a MK |
3577 | } |
3578 | } | |
3579 | ||
3580 | /* | |
3581 | * Switch from indirection array to linear (direct) extent allocations. | |
3582 | */ | |
d96f8f89 | 3583 | STATIC void |
0293ce3a MK |
3584 | xfs_iext_indirect_to_direct( |
3585 | xfs_ifork_t *ifp) /* inode fork pointer */ | |
3586 | { | |
a6f64d4a | 3587 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
0293ce3a MK |
3588 | xfs_extnum_t nextents; /* number of extents in file */ |
3589 | int size; /* size of file extents */ | |
3590 | ||
3591 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3592 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3593 | ASSERT(nextents <= XFS_LINEAR_EXTS); | |
3594 | size = nextents * sizeof(xfs_bmbt_rec_t); | |
3595 | ||
71a8c87f | 3596 | xfs_iext_irec_compact_pages(ifp); |
0293ce3a MK |
3597 | ASSERT(ifp->if_real_bytes == XFS_IEXT_BUFSZ); |
3598 | ||
3599 | ep = ifp->if_u1.if_ext_irec->er_extbuf; | |
f0e2d93c | 3600 | kmem_free(ifp->if_u1.if_ext_irec); |
0293ce3a MK |
3601 | ifp->if_flags &= ~XFS_IFEXTIREC; |
3602 | ifp->if_u1.if_extents = ep; | |
3603 | ifp->if_bytes = size; | |
3604 | if (nextents < XFS_LINEAR_EXTS) { | |
3605 | xfs_iext_realloc_direct(ifp, size); | |
3606 | } | |
3607 | } | |
3608 | ||
4eea22f0 MK |
3609 | /* |
3610 | * Free incore file extents. | |
3611 | */ | |
3612 | void | |
3613 | xfs_iext_destroy( | |
3614 | xfs_ifork_t *ifp) /* inode fork pointer */ | |
3615 | { | |
0293ce3a MK |
3616 | if (ifp->if_flags & XFS_IFEXTIREC) { |
3617 | int erp_idx; | |
3618 | int nlists; | |
3619 | ||
3620 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3621 | for (erp_idx = nlists - 1; erp_idx >= 0 ; erp_idx--) { | |
3622 | xfs_iext_irec_remove(ifp, erp_idx); | |
3623 | } | |
3624 | ifp->if_flags &= ~XFS_IFEXTIREC; | |
3625 | } else if (ifp->if_real_bytes) { | |
f0e2d93c | 3626 | kmem_free(ifp->if_u1.if_extents); |
4eea22f0 MK |
3627 | } else if (ifp->if_bytes) { |
3628 | memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS * | |
3629 | sizeof(xfs_bmbt_rec_t)); | |
3630 | } | |
3631 | ifp->if_u1.if_extents = NULL; | |
3632 | ifp->if_real_bytes = 0; | |
3633 | ifp->if_bytes = 0; | |
3634 | } | |
0293ce3a | 3635 | |
8867bc9b MK |
3636 | /* |
3637 | * Return a pointer to the extent record for file system block bno. | |
3638 | */ | |
a6f64d4a | 3639 | xfs_bmbt_rec_host_t * /* pointer to found extent record */ |
8867bc9b MK |
3640 | xfs_iext_bno_to_ext( |
3641 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3642 | xfs_fileoff_t bno, /* block number to search for */ | |
3643 | xfs_extnum_t *idxp) /* index of target extent */ | |
3644 | { | |
a6f64d4a | 3645 | xfs_bmbt_rec_host_t *base; /* pointer to first extent */ |
8867bc9b | 3646 | xfs_filblks_t blockcount = 0; /* number of blocks in extent */ |
a6f64d4a | 3647 | xfs_bmbt_rec_host_t *ep = NULL; /* pointer to target extent */ |
8867bc9b | 3648 | xfs_ext_irec_t *erp = NULL; /* indirection array pointer */ |
c41564b5 | 3649 | int high; /* upper boundary in search */ |
8867bc9b | 3650 | xfs_extnum_t idx = 0; /* index of target extent */ |
c41564b5 | 3651 | int low; /* lower boundary in search */ |
8867bc9b MK |
3652 | xfs_extnum_t nextents; /* number of file extents */ |
3653 | xfs_fileoff_t startoff = 0; /* start offset of extent */ | |
3654 | ||
3655 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3656 | if (nextents == 0) { | |
3657 | *idxp = 0; | |
3658 | return NULL; | |
3659 | } | |
3660 | low = 0; | |
3661 | if (ifp->if_flags & XFS_IFEXTIREC) { | |
3662 | /* Find target extent list */ | |
3663 | int erp_idx = 0; | |
3664 | erp = xfs_iext_bno_to_irec(ifp, bno, &erp_idx); | |
3665 | base = erp->er_extbuf; | |
3666 | high = erp->er_extcount - 1; | |
3667 | } else { | |
3668 | base = ifp->if_u1.if_extents; | |
3669 | high = nextents - 1; | |
3670 | } | |
3671 | /* Binary search extent records */ | |
3672 | while (low <= high) { | |
3673 | idx = (low + high) >> 1; | |
3674 | ep = base + idx; | |
3675 | startoff = xfs_bmbt_get_startoff(ep); | |
3676 | blockcount = xfs_bmbt_get_blockcount(ep); | |
3677 | if (bno < startoff) { | |
3678 | high = idx - 1; | |
3679 | } else if (bno >= startoff + blockcount) { | |
3680 | low = idx + 1; | |
3681 | } else { | |
3682 | /* Convert back to file-based extent index */ | |
3683 | if (ifp->if_flags & XFS_IFEXTIREC) { | |
3684 | idx += erp->er_extoff; | |
3685 | } | |
3686 | *idxp = idx; | |
3687 | return ep; | |
3688 | } | |
3689 | } | |
3690 | /* Convert back to file-based extent index */ | |
3691 | if (ifp->if_flags & XFS_IFEXTIREC) { | |
3692 | idx += erp->er_extoff; | |
3693 | } | |
3694 | if (bno >= startoff + blockcount) { | |
3695 | if (++idx == nextents) { | |
3696 | ep = NULL; | |
3697 | } else { | |
3698 | ep = xfs_iext_get_ext(ifp, idx); | |
3699 | } | |
3700 | } | |
3701 | *idxp = idx; | |
3702 | return ep; | |
3703 | } | |
3704 | ||
0293ce3a MK |
3705 | /* |
3706 | * Return a pointer to the indirection array entry containing the | |
3707 | * extent record for filesystem block bno. Store the index of the | |
3708 | * target irec in *erp_idxp. | |
3709 | */ | |
8867bc9b | 3710 | xfs_ext_irec_t * /* pointer to found extent record */ |
0293ce3a MK |
3711 | xfs_iext_bno_to_irec( |
3712 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3713 | xfs_fileoff_t bno, /* block number to search for */ | |
3714 | int *erp_idxp) /* irec index of target ext list */ | |
3715 | { | |
3716 | xfs_ext_irec_t *erp = NULL; /* indirection array pointer */ | |
3717 | xfs_ext_irec_t *erp_next; /* next indirection array entry */ | |
8867bc9b | 3718 | int erp_idx; /* indirection array index */ |
0293ce3a MK |
3719 | int nlists; /* number of extent irec's (lists) */ |
3720 | int high; /* binary search upper limit */ | |
3721 | int low; /* binary search lower limit */ | |
3722 | ||
3723 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3724 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3725 | erp_idx = 0; | |
3726 | low = 0; | |
3727 | high = nlists - 1; | |
3728 | while (low <= high) { | |
3729 | erp_idx = (low + high) >> 1; | |
3730 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; | |
3731 | erp_next = erp_idx < nlists - 1 ? erp + 1 : NULL; | |
3732 | if (bno < xfs_bmbt_get_startoff(erp->er_extbuf)) { | |
3733 | high = erp_idx - 1; | |
3734 | } else if (erp_next && bno >= | |
3735 | xfs_bmbt_get_startoff(erp_next->er_extbuf)) { | |
3736 | low = erp_idx + 1; | |
3737 | } else { | |
3738 | break; | |
3739 | } | |
3740 | } | |
3741 | *erp_idxp = erp_idx; | |
3742 | return erp; | |
3743 | } | |
3744 | ||
3745 | /* | |
3746 | * Return a pointer to the indirection array entry containing the | |
3747 | * extent record at file extent index *idxp. Store the index of the | |
3748 | * target irec in *erp_idxp and store the page index of the target | |
3749 | * extent record in *idxp. | |
3750 | */ | |
3751 | xfs_ext_irec_t * | |
3752 | xfs_iext_idx_to_irec( | |
3753 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3754 | xfs_extnum_t *idxp, /* extent index (file -> page) */ | |
3755 | int *erp_idxp, /* pointer to target irec */ | |
3756 | int realloc) /* new bytes were just added */ | |
3757 | { | |
3758 | xfs_ext_irec_t *prev; /* pointer to previous irec */ | |
3759 | xfs_ext_irec_t *erp = NULL; /* pointer to current irec */ | |
3760 | int erp_idx; /* indirection array index */ | |
3761 | int nlists; /* number of irec's (ex lists) */ | |
3762 | int high; /* binary search upper limit */ | |
3763 | int low; /* binary search lower limit */ | |
3764 | xfs_extnum_t page_idx = *idxp; /* extent index in target list */ | |
3765 | ||
3766 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
87bef181 CH |
3767 | ASSERT(page_idx >= 0); |
3768 | ASSERT(page_idx <= ifp->if_bytes / sizeof(xfs_bmbt_rec_t)); | |
3769 | ASSERT(page_idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t) || realloc); | |
3770 | ||
0293ce3a MK |
3771 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
3772 | erp_idx = 0; | |
3773 | low = 0; | |
3774 | high = nlists - 1; | |
3775 | ||
3776 | /* Binary search extent irec's */ | |
3777 | while (low <= high) { | |
3778 | erp_idx = (low + high) >> 1; | |
3779 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; | |
3780 | prev = erp_idx > 0 ? erp - 1 : NULL; | |
3781 | if (page_idx < erp->er_extoff || (page_idx == erp->er_extoff && | |
3782 | realloc && prev && prev->er_extcount < XFS_LINEAR_EXTS)) { | |
3783 | high = erp_idx - 1; | |
3784 | } else if (page_idx > erp->er_extoff + erp->er_extcount || | |
3785 | (page_idx == erp->er_extoff + erp->er_extcount && | |
3786 | !realloc)) { | |
3787 | low = erp_idx + 1; | |
3788 | } else if (page_idx == erp->er_extoff + erp->er_extcount && | |
3789 | erp->er_extcount == XFS_LINEAR_EXTS) { | |
3790 | ASSERT(realloc); | |
3791 | page_idx = 0; | |
3792 | erp_idx++; | |
3793 | erp = erp_idx < nlists ? erp + 1 : NULL; | |
3794 | break; | |
3795 | } else { | |
3796 | page_idx -= erp->er_extoff; | |
3797 | break; | |
3798 | } | |
3799 | } | |
3800 | *idxp = page_idx; | |
3801 | *erp_idxp = erp_idx; | |
3802 | return(erp); | |
3803 | } | |
3804 | ||
3805 | /* | |
3806 | * Allocate and initialize an indirection array once the space needed | |
3807 | * for incore extents increases above XFS_IEXT_BUFSZ. | |
3808 | */ | |
3809 | void | |
3810 | xfs_iext_irec_init( | |
3811 | xfs_ifork_t *ifp) /* inode fork pointer */ | |
3812 | { | |
3813 | xfs_ext_irec_t *erp; /* indirection array pointer */ | |
3814 | xfs_extnum_t nextents; /* number of extents in file */ | |
3815 | ||
3816 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); | |
3817 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3818 | ASSERT(nextents <= XFS_LINEAR_EXTS); | |
3819 | ||
6785073b | 3820 | erp = kmem_alloc(sizeof(xfs_ext_irec_t), KM_NOFS); |
0293ce3a MK |
3821 | |
3822 | if (nextents == 0) { | |
6785073b | 3823 | ifp->if_u1.if_extents = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS); |
0293ce3a MK |
3824 | } else if (!ifp->if_real_bytes) { |
3825 | xfs_iext_inline_to_direct(ifp, XFS_IEXT_BUFSZ); | |
3826 | } else if (ifp->if_real_bytes < XFS_IEXT_BUFSZ) { | |
3827 | xfs_iext_realloc_direct(ifp, XFS_IEXT_BUFSZ); | |
3828 | } | |
3829 | erp->er_extbuf = ifp->if_u1.if_extents; | |
3830 | erp->er_extcount = nextents; | |
3831 | erp->er_extoff = 0; | |
3832 | ||
3833 | ifp->if_flags |= XFS_IFEXTIREC; | |
3834 | ifp->if_real_bytes = XFS_IEXT_BUFSZ; | |
3835 | ifp->if_bytes = nextents * sizeof(xfs_bmbt_rec_t); | |
3836 | ifp->if_u1.if_ext_irec = erp; | |
3837 | ||
3838 | return; | |
3839 | } | |
3840 | ||
3841 | /* | |
3842 | * Allocate and initialize a new entry in the indirection array. | |
3843 | */ | |
3844 | xfs_ext_irec_t * | |
3845 | xfs_iext_irec_new( | |
3846 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3847 | int erp_idx) /* index for new irec */ | |
3848 | { | |
3849 | xfs_ext_irec_t *erp; /* indirection array pointer */ | |
3850 | int i; /* loop counter */ | |
3851 | int nlists; /* number of irec's (ex lists) */ | |
3852 | ||
3853 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3854 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3855 | ||
3856 | /* Resize indirection array */ | |
3857 | xfs_iext_realloc_indirect(ifp, ++nlists * | |
3858 | sizeof(xfs_ext_irec_t)); | |
3859 | /* | |
3860 | * Move records down in the array so the | |
3861 | * new page can use erp_idx. | |
3862 | */ | |
3863 | erp = ifp->if_u1.if_ext_irec; | |
3864 | for (i = nlists - 1; i > erp_idx; i--) { | |
3865 | memmove(&erp[i], &erp[i-1], sizeof(xfs_ext_irec_t)); | |
3866 | } | |
3867 | ASSERT(i == erp_idx); | |
3868 | ||
3869 | /* Initialize new extent record */ | |
3870 | erp = ifp->if_u1.if_ext_irec; | |
6785073b | 3871 | erp[erp_idx].er_extbuf = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS); |
0293ce3a MK |
3872 | ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ; |
3873 | memset(erp[erp_idx].er_extbuf, 0, XFS_IEXT_BUFSZ); | |
3874 | erp[erp_idx].er_extcount = 0; | |
3875 | erp[erp_idx].er_extoff = erp_idx > 0 ? | |
3876 | erp[erp_idx-1].er_extoff + erp[erp_idx-1].er_extcount : 0; | |
3877 | return (&erp[erp_idx]); | |
3878 | } | |
3879 | ||
3880 | /* | |
3881 | * Remove a record from the indirection array. | |
3882 | */ | |
3883 | void | |
3884 | xfs_iext_irec_remove( | |
3885 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3886 | int erp_idx) /* irec index to remove */ | |
3887 | { | |
3888 | xfs_ext_irec_t *erp; /* indirection array pointer */ | |
3889 | int i; /* loop counter */ | |
3890 | int nlists; /* number of irec's (ex lists) */ | |
3891 | ||
3892 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3893 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3894 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; | |
3895 | if (erp->er_extbuf) { | |
3896 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, | |
3897 | -erp->er_extcount); | |
f0e2d93c | 3898 | kmem_free(erp->er_extbuf); |
0293ce3a MK |
3899 | } |
3900 | /* Compact extent records */ | |
3901 | erp = ifp->if_u1.if_ext_irec; | |
3902 | for (i = erp_idx; i < nlists - 1; i++) { | |
3903 | memmove(&erp[i], &erp[i+1], sizeof(xfs_ext_irec_t)); | |
3904 | } | |
3905 | /* | |
3906 | * Manually free the last extent record from the indirection | |
3907 | * array. A call to xfs_iext_realloc_indirect() with a size | |
3908 | * of zero would result in a call to xfs_iext_destroy() which | |
3909 | * would in turn call this function again, creating a nasty | |
3910 | * infinite loop. | |
3911 | */ | |
3912 | if (--nlists) { | |
3913 | xfs_iext_realloc_indirect(ifp, | |
3914 | nlists * sizeof(xfs_ext_irec_t)); | |
3915 | } else { | |
f0e2d93c | 3916 | kmem_free(ifp->if_u1.if_ext_irec); |
0293ce3a MK |
3917 | } |
3918 | ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ; | |
3919 | } | |
3920 | ||
3921 | /* | |
3922 | * This is called to clean up large amounts of unused memory allocated | |
3923 | * by the indirection array. Before compacting anything though, verify | |
3924 | * that the indirection array is still needed and switch back to the | |
3925 | * linear extent list (or even the inline buffer) if possible. The | |
3926 | * compaction policy is as follows: | |
3927 | * | |
3928 | * Full Compaction: Extents fit into a single page (or inline buffer) | |
71a8c87f | 3929 | * Partial Compaction: Extents occupy less than 50% of allocated space |
0293ce3a MK |
3930 | * No Compaction: Extents occupy at least 50% of allocated space |
3931 | */ | |
3932 | void | |
3933 | xfs_iext_irec_compact( | |
3934 | xfs_ifork_t *ifp) /* inode fork pointer */ | |
3935 | { | |
3936 | xfs_extnum_t nextents; /* number of extents in file */ | |
3937 | int nlists; /* number of irec's (ex lists) */ | |
3938 | ||
3939 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3940 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3941 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
3942 | ||
3943 | if (nextents == 0) { | |
3944 | xfs_iext_destroy(ifp); | |
3945 | } else if (nextents <= XFS_INLINE_EXTS) { | |
3946 | xfs_iext_indirect_to_direct(ifp); | |
3947 | xfs_iext_direct_to_inline(ifp, nextents); | |
3948 | } else if (nextents <= XFS_LINEAR_EXTS) { | |
3949 | xfs_iext_indirect_to_direct(ifp); | |
0293ce3a MK |
3950 | } else if (nextents < (nlists * XFS_LINEAR_EXTS) >> 1) { |
3951 | xfs_iext_irec_compact_pages(ifp); | |
3952 | } | |
3953 | } | |
3954 | ||
3955 | /* | |
3956 | * Combine extents from neighboring extent pages. | |
3957 | */ | |
3958 | void | |
3959 | xfs_iext_irec_compact_pages( | |
3960 | xfs_ifork_t *ifp) /* inode fork pointer */ | |
3961 | { | |
3962 | xfs_ext_irec_t *erp, *erp_next;/* pointers to irec entries */ | |
3963 | int erp_idx = 0; /* indirection array index */ | |
3964 | int nlists; /* number of irec's (ex lists) */ | |
3965 | ||
3966 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
3967 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3968 | while (erp_idx < nlists - 1) { | |
3969 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; | |
3970 | erp_next = erp + 1; | |
3971 | if (erp_next->er_extcount <= | |
3972 | (XFS_LINEAR_EXTS - erp->er_extcount)) { | |
71a8c87f | 3973 | memcpy(&erp->er_extbuf[erp->er_extcount], |
0293ce3a MK |
3974 | erp_next->er_extbuf, erp_next->er_extcount * |
3975 | sizeof(xfs_bmbt_rec_t)); | |
3976 | erp->er_extcount += erp_next->er_extcount; | |
3977 | /* | |
3978 | * Free page before removing extent record | |
3979 | * so er_extoffs don't get modified in | |
3980 | * xfs_iext_irec_remove. | |
3981 | */ | |
f0e2d93c | 3982 | kmem_free(erp_next->er_extbuf); |
0293ce3a MK |
3983 | erp_next->er_extbuf = NULL; |
3984 | xfs_iext_irec_remove(ifp, erp_idx + 1); | |
3985 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
3986 | } else { | |
3987 | erp_idx++; | |
3988 | } | |
3989 | } | |
3990 | } | |
3991 | ||
0293ce3a MK |
3992 | /* |
3993 | * This is called to update the er_extoff field in the indirection | |
3994 | * array when extents have been added or removed from one of the | |
3995 | * extent lists. erp_idx contains the irec index to begin updating | |
3996 | * at and ext_diff contains the number of extents that were added | |
3997 | * or removed. | |
3998 | */ | |
3999 | void | |
4000 | xfs_iext_irec_update_extoffs( | |
4001 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
4002 | int erp_idx, /* irec index to update */ | |
4003 | int ext_diff) /* number of new extents */ | |
4004 | { | |
4005 | int i; /* loop counter */ | |
4006 | int nlists; /* number of irec's (ex lists */ | |
4007 | ||
4008 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); | |
4009 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; | |
4010 | for (i = erp_idx; i < nlists; i++) { | |
4011 | ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff; | |
4012 | } | |
4013 | } | |
72b53efa BF |
4014 | |
4015 | /* | |
4016 | * Test whether it is appropriate to check an inode for and free post EOF | |
4017 | * blocks. The 'force' parameter determines whether we should also consider | |
4018 | * regular files that are marked preallocated or append-only. | |
4019 | */ | |
4020 | bool | |
4021 | xfs_can_free_eofblocks(struct xfs_inode *ip, bool force) | |
4022 | { | |
4023 | /* prealloc/delalloc exists only on regular files */ | |
4024 | if (!S_ISREG(ip->i_d.di_mode)) | |
4025 | return false; | |
4026 | ||
4027 | /* | |
4028 | * Zero sized files with no cached pages and delalloc blocks will not | |
4029 | * have speculative prealloc/delalloc blocks to remove. | |
4030 | */ | |
4031 | if (VFS_I(ip)->i_size == 0 && | |
4032 | VN_CACHED(VFS_I(ip)) == 0 && | |
4033 | ip->i_delayed_blks == 0) | |
4034 | return false; | |
4035 | ||
4036 | /* If we haven't read in the extent list, then don't do it now. */ | |
4037 | if (!(ip->i_df.if_flags & XFS_IFEXTENTS)) | |
4038 | return false; | |
4039 | ||
4040 | /* | |
4041 | * Do not free real preallocated or append-only files unless the file | |
4042 | * has delalloc blocks and we are forced to remove them. | |
4043 | */ | |
4044 | if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) | |
4045 | if (!force || ip->i_delayed_blks == 0) | |
4046 | return false; | |
4047 | ||
4048 | return true; | |
4049 | } | |
4050 |