Commit | Line | Data |
---|---|---|
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" |
70a9883c | 22 | #include "xfs_shared.h" |
239880ef DC |
23 | #include "xfs_format.h" |
24 | #include "xfs_log_format.h" | |
25 | #include "xfs_trans_resv.h" | |
1da177e4 | 26 | #include "xfs_sb.h" |
1da177e4 | 27 | #include "xfs_mount.h" |
3ab78df2 | 28 | #include "xfs_defer.h" |
a4fbe6ab | 29 | #include "xfs_inode.h" |
57062787 | 30 | #include "xfs_da_format.h" |
c24b5dfa | 31 | #include "xfs_da_btree.h" |
c24b5dfa | 32 | #include "xfs_dir2.h" |
a844f451 | 33 | #include "xfs_attr_sf.h" |
c24b5dfa | 34 | #include "xfs_attr.h" |
239880ef DC |
35 | #include "xfs_trans_space.h" |
36 | #include "xfs_trans.h" | |
1da177e4 | 37 | #include "xfs_buf_item.h" |
a844f451 | 38 | #include "xfs_inode_item.h" |
a844f451 NS |
39 | #include "xfs_ialloc.h" |
40 | #include "xfs_bmap.h" | |
68988114 | 41 | #include "xfs_bmap_util.h" |
1da177e4 | 42 | #include "xfs_error.h" |
1da177e4 | 43 | #include "xfs_quota.h" |
2a82b8be | 44 | #include "xfs_filestream.h" |
93848a99 | 45 | #include "xfs_cksum.h" |
0b1b213f | 46 | #include "xfs_trace.h" |
33479e05 | 47 | #include "xfs_icache.h" |
c24b5dfa | 48 | #include "xfs_symlink.h" |
239880ef DC |
49 | #include "xfs_trans_priv.h" |
50 | #include "xfs_log.h" | |
a4fbe6ab | 51 | #include "xfs_bmap_btree.h" |
1da177e4 | 52 | |
1da177e4 | 53 | kmem_zone_t *xfs_inode_zone; |
1da177e4 LT |
54 | |
55 | /* | |
8f04c47a | 56 | * Used in xfs_itruncate_extents(). This is the maximum number of extents |
1da177e4 LT |
57 | * freed from a file in a single transaction. |
58 | */ | |
59 | #define XFS_ITRUNC_MAX_EXTENTS 2 | |
60 | ||
54d7b5c1 DC |
61 | STATIC int xfs_iflush_int(struct xfs_inode *, struct xfs_buf *); |
62 | STATIC int xfs_iunlink(struct xfs_trans *, struct xfs_inode *); | |
63 | STATIC int xfs_iunlink_remove(struct xfs_trans *, struct xfs_inode *); | |
ab297431 | 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 | 79 | /* |
efa70be1 CH |
80 | * These two are wrapper routines around the xfs_ilock() routine used to |
81 | * centralize some grungy code. They are used in places that wish to lock the | |
82 | * inode solely for reading the extents. The reason these places can't just | |
83 | * call xfs_ilock(ip, XFS_ILOCK_SHARED) is that the inode lock also guards to | |
84 | * bringing in of the extents from disk for a file in b-tree format. If the | |
85 | * inode is in b-tree format, then we need to lock the inode exclusively until | |
86 | * the extents are read in. Locking it exclusively all the time would limit | |
87 | * our parallelism unnecessarily, though. What we do instead is check to see | |
88 | * if the extents have been read in yet, and only lock the inode exclusively | |
89 | * if they have not. | |
fa96acad | 90 | * |
efa70be1 | 91 | * The functions return a value which should be given to the corresponding |
01f4f327 | 92 | * xfs_iunlock() call. |
fa96acad DC |
93 | */ |
94 | uint | |
309ecac8 CH |
95 | xfs_ilock_data_map_shared( |
96 | struct xfs_inode *ip) | |
fa96acad | 97 | { |
309ecac8 | 98 | uint lock_mode = XFS_ILOCK_SHARED; |
fa96acad | 99 | |
309ecac8 CH |
100 | if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE && |
101 | (ip->i_df.if_flags & XFS_IFEXTENTS) == 0) | |
fa96acad | 102 | lock_mode = XFS_ILOCK_EXCL; |
fa96acad | 103 | xfs_ilock(ip, lock_mode); |
fa96acad DC |
104 | return lock_mode; |
105 | } | |
106 | ||
efa70be1 CH |
107 | uint |
108 | xfs_ilock_attr_map_shared( | |
109 | struct xfs_inode *ip) | |
fa96acad | 110 | { |
efa70be1 CH |
111 | uint lock_mode = XFS_ILOCK_SHARED; |
112 | ||
113 | if (ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE && | |
114 | (ip->i_afp->if_flags & XFS_IFEXTENTS) == 0) | |
115 | lock_mode = XFS_ILOCK_EXCL; | |
116 | xfs_ilock(ip, lock_mode); | |
117 | return lock_mode; | |
fa96acad DC |
118 | } |
119 | ||
120 | /* | |
653c60b6 DC |
121 | * The xfs inode contains 3 multi-reader locks: the i_iolock the i_mmap_lock and |
122 | * the i_lock. This routine allows various combinations of the locks to be | |
123 | * obtained. | |
fa96acad | 124 | * |
653c60b6 DC |
125 | * The 3 locks should always be ordered so that the IO lock is obtained first, |
126 | * the mmap lock second and the ilock last in order to prevent deadlock. | |
fa96acad | 127 | * |
653c60b6 DC |
128 | * Basic locking order: |
129 | * | |
130 | * i_iolock -> i_mmap_lock -> page_lock -> i_ilock | |
131 | * | |
132 | * mmap_sem locking order: | |
133 | * | |
134 | * i_iolock -> page lock -> mmap_sem | |
135 | * mmap_sem -> i_mmap_lock -> page_lock | |
136 | * | |
137 | * The difference in mmap_sem locking order mean that we cannot hold the | |
138 | * i_mmap_lock over syscall based read(2)/write(2) based IO. These IO paths can | |
139 | * fault in pages during copy in/out (for buffered IO) or require the mmap_sem | |
140 | * in get_user_pages() to map the user pages into the kernel address space for | |
141 | * direct IO. Similarly the i_iolock cannot be taken inside a page fault because | |
142 | * page faults already hold the mmap_sem. | |
143 | * | |
144 | * Hence to serialise fully against both syscall and mmap based IO, we need to | |
145 | * take both the i_iolock and the i_mmap_lock. These locks should *only* be both | |
146 | * taken in places where we need to invalidate the page cache in a race | |
147 | * free manner (e.g. truncate, hole punch and other extent manipulation | |
148 | * functions). | |
fa96acad DC |
149 | */ |
150 | void | |
151 | xfs_ilock( | |
152 | xfs_inode_t *ip, | |
153 | uint lock_flags) | |
154 | { | |
155 | trace_xfs_ilock(ip, lock_flags, _RET_IP_); | |
156 | ||
157 | /* | |
158 | * You can't set both SHARED and EXCL for the same lock, | |
159 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
160 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
161 | */ | |
162 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
163 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
164 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
165 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
166 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
167 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 168 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
169 | |
170 | if (lock_flags & XFS_IOLOCK_EXCL) | |
171 | mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); | |
172 | else if (lock_flags & XFS_IOLOCK_SHARED) | |
173 | mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); | |
174 | ||
653c60b6 DC |
175 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
176 | mrupdate_nested(&ip->i_mmaplock, XFS_MMAPLOCK_DEP(lock_flags)); | |
177 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
178 | mraccess_nested(&ip->i_mmaplock, XFS_MMAPLOCK_DEP(lock_flags)); | |
179 | ||
fa96acad DC |
180 | if (lock_flags & XFS_ILOCK_EXCL) |
181 | mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
182 | else if (lock_flags & XFS_ILOCK_SHARED) | |
183 | mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
184 | } | |
185 | ||
186 | /* | |
187 | * This is just like xfs_ilock(), except that the caller | |
188 | * is guaranteed not to sleep. It returns 1 if it gets | |
189 | * the requested locks and 0 otherwise. If the IO lock is | |
190 | * obtained but the inode lock cannot be, then the IO lock | |
191 | * is dropped before returning. | |
192 | * | |
193 | * ip -- the inode being locked | |
194 | * lock_flags -- this parameter indicates the inode's locks to be | |
195 | * to be locked. See the comment for xfs_ilock() for a list | |
196 | * of valid values. | |
197 | */ | |
198 | int | |
199 | xfs_ilock_nowait( | |
200 | xfs_inode_t *ip, | |
201 | uint lock_flags) | |
202 | { | |
203 | trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_); | |
204 | ||
205 | /* | |
206 | * You can't set both SHARED and EXCL for the same lock, | |
207 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
208 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
209 | */ | |
210 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
211 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
212 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
213 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
214 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
215 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 216 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
217 | |
218 | if (lock_flags & XFS_IOLOCK_EXCL) { | |
219 | if (!mrtryupdate(&ip->i_iolock)) | |
220 | goto out; | |
221 | } else if (lock_flags & XFS_IOLOCK_SHARED) { | |
222 | if (!mrtryaccess(&ip->i_iolock)) | |
223 | goto out; | |
224 | } | |
653c60b6 DC |
225 | |
226 | if (lock_flags & XFS_MMAPLOCK_EXCL) { | |
227 | if (!mrtryupdate(&ip->i_mmaplock)) | |
228 | goto out_undo_iolock; | |
229 | } else if (lock_flags & XFS_MMAPLOCK_SHARED) { | |
230 | if (!mrtryaccess(&ip->i_mmaplock)) | |
231 | goto out_undo_iolock; | |
232 | } | |
233 | ||
fa96acad DC |
234 | if (lock_flags & XFS_ILOCK_EXCL) { |
235 | if (!mrtryupdate(&ip->i_lock)) | |
653c60b6 | 236 | goto out_undo_mmaplock; |
fa96acad DC |
237 | } else if (lock_flags & XFS_ILOCK_SHARED) { |
238 | if (!mrtryaccess(&ip->i_lock)) | |
653c60b6 | 239 | goto out_undo_mmaplock; |
fa96acad DC |
240 | } |
241 | return 1; | |
242 | ||
653c60b6 DC |
243 | out_undo_mmaplock: |
244 | if (lock_flags & XFS_MMAPLOCK_EXCL) | |
245 | mrunlock_excl(&ip->i_mmaplock); | |
246 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
247 | mrunlock_shared(&ip->i_mmaplock); | |
248 | out_undo_iolock: | |
fa96acad DC |
249 | if (lock_flags & XFS_IOLOCK_EXCL) |
250 | mrunlock_excl(&ip->i_iolock); | |
251 | else if (lock_flags & XFS_IOLOCK_SHARED) | |
252 | mrunlock_shared(&ip->i_iolock); | |
653c60b6 | 253 | out: |
fa96acad DC |
254 | return 0; |
255 | } | |
256 | ||
257 | /* | |
258 | * xfs_iunlock() is used to drop the inode locks acquired with | |
259 | * xfs_ilock() and xfs_ilock_nowait(). The caller must pass | |
260 | * in the flags given to xfs_ilock() or xfs_ilock_nowait() so | |
261 | * that we know which locks to drop. | |
262 | * | |
263 | * ip -- the inode being unlocked | |
264 | * lock_flags -- this parameter indicates the inode's locks to be | |
265 | * to be unlocked. See the comment for xfs_ilock() for a list | |
266 | * of valid values for this parameter. | |
267 | * | |
268 | */ | |
269 | void | |
270 | xfs_iunlock( | |
271 | xfs_inode_t *ip, | |
272 | uint lock_flags) | |
273 | { | |
274 | /* | |
275 | * You can't set both SHARED and EXCL for the same lock, | |
276 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
277 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
278 | */ | |
279 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
280 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
281 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
282 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
283 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
284 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 285 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
286 | ASSERT(lock_flags != 0); |
287 | ||
288 | if (lock_flags & XFS_IOLOCK_EXCL) | |
289 | mrunlock_excl(&ip->i_iolock); | |
290 | else if (lock_flags & XFS_IOLOCK_SHARED) | |
291 | mrunlock_shared(&ip->i_iolock); | |
292 | ||
653c60b6 DC |
293 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
294 | mrunlock_excl(&ip->i_mmaplock); | |
295 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
296 | mrunlock_shared(&ip->i_mmaplock); | |
297 | ||
fa96acad DC |
298 | if (lock_flags & XFS_ILOCK_EXCL) |
299 | mrunlock_excl(&ip->i_lock); | |
300 | else if (lock_flags & XFS_ILOCK_SHARED) | |
301 | mrunlock_shared(&ip->i_lock); | |
302 | ||
303 | trace_xfs_iunlock(ip, lock_flags, _RET_IP_); | |
304 | } | |
305 | ||
306 | /* | |
307 | * give up write locks. the i/o lock cannot be held nested | |
308 | * if it is being demoted. | |
309 | */ | |
310 | void | |
311 | xfs_ilock_demote( | |
312 | xfs_inode_t *ip, | |
313 | uint lock_flags) | |
314 | { | |
653c60b6 DC |
315 | ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_MMAPLOCK_EXCL|XFS_ILOCK_EXCL)); |
316 | ASSERT((lock_flags & | |
317 | ~(XFS_IOLOCK_EXCL|XFS_MMAPLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); | |
fa96acad DC |
318 | |
319 | if (lock_flags & XFS_ILOCK_EXCL) | |
320 | mrdemote(&ip->i_lock); | |
653c60b6 DC |
321 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
322 | mrdemote(&ip->i_mmaplock); | |
fa96acad DC |
323 | if (lock_flags & XFS_IOLOCK_EXCL) |
324 | mrdemote(&ip->i_iolock); | |
325 | ||
326 | trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_); | |
327 | } | |
328 | ||
742ae1e3 | 329 | #if defined(DEBUG) || defined(XFS_WARN) |
fa96acad DC |
330 | int |
331 | xfs_isilocked( | |
332 | xfs_inode_t *ip, | |
333 | uint lock_flags) | |
334 | { | |
335 | if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { | |
336 | if (!(lock_flags & XFS_ILOCK_SHARED)) | |
337 | return !!ip->i_lock.mr_writer; | |
338 | return rwsem_is_locked(&ip->i_lock.mr_lock); | |
339 | } | |
340 | ||
653c60b6 DC |
341 | if (lock_flags & (XFS_MMAPLOCK_EXCL|XFS_MMAPLOCK_SHARED)) { |
342 | if (!(lock_flags & XFS_MMAPLOCK_SHARED)) | |
343 | return !!ip->i_mmaplock.mr_writer; | |
344 | return rwsem_is_locked(&ip->i_mmaplock.mr_lock); | |
345 | } | |
346 | ||
fa96acad DC |
347 | if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { |
348 | if (!(lock_flags & XFS_IOLOCK_SHARED)) | |
349 | return !!ip->i_iolock.mr_writer; | |
350 | return rwsem_is_locked(&ip->i_iolock.mr_lock); | |
351 | } | |
352 | ||
353 | ASSERT(0); | |
354 | return 0; | |
355 | } | |
356 | #endif | |
357 | ||
c24b5dfa DC |
358 | #ifdef DEBUG |
359 | int xfs_locked_n; | |
360 | int xfs_small_retries; | |
361 | int xfs_middle_retries; | |
362 | int xfs_lots_retries; | |
363 | int xfs_lock_delays; | |
364 | #endif | |
365 | ||
b6a9947e DC |
366 | /* |
367 | * xfs_lockdep_subclass_ok() is only used in an ASSERT, so is only called when | |
368 | * DEBUG or XFS_WARN is set. And MAX_LOCKDEP_SUBCLASSES is then only defined | |
369 | * when CONFIG_LOCKDEP is set. Hence the complex define below to avoid build | |
370 | * errors and warnings. | |
371 | */ | |
372 | #if (defined(DEBUG) || defined(XFS_WARN)) && defined(CONFIG_LOCKDEP) | |
3403ccc0 DC |
373 | static bool |
374 | xfs_lockdep_subclass_ok( | |
375 | int subclass) | |
376 | { | |
377 | return subclass < MAX_LOCKDEP_SUBCLASSES; | |
378 | } | |
379 | #else | |
380 | #define xfs_lockdep_subclass_ok(subclass) (true) | |
381 | #endif | |
382 | ||
c24b5dfa | 383 | /* |
653c60b6 | 384 | * Bump the subclass so xfs_lock_inodes() acquires each lock with a different |
0952c818 DC |
385 | * value. This can be called for any type of inode lock combination, including |
386 | * parent locking. Care must be taken to ensure we don't overrun the subclass | |
387 | * storage fields in the class mask we build. | |
c24b5dfa DC |
388 | */ |
389 | static inline int | |
390 | xfs_lock_inumorder(int lock_mode, int subclass) | |
391 | { | |
0952c818 DC |
392 | int class = 0; |
393 | ||
394 | ASSERT(!(lock_mode & (XFS_ILOCK_PARENT | XFS_ILOCK_RTBITMAP | | |
395 | XFS_ILOCK_RTSUM))); | |
3403ccc0 | 396 | ASSERT(xfs_lockdep_subclass_ok(subclass)); |
0952c818 | 397 | |
653c60b6 | 398 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) { |
0952c818 | 399 | ASSERT(subclass <= XFS_IOLOCK_MAX_SUBCLASS); |
3403ccc0 DC |
400 | ASSERT(xfs_lockdep_subclass_ok(subclass + |
401 | XFS_IOLOCK_PARENT_VAL)); | |
0952c818 DC |
402 | class += subclass << XFS_IOLOCK_SHIFT; |
403 | if (lock_mode & XFS_IOLOCK_PARENT) | |
404 | class += XFS_IOLOCK_PARENT_VAL << XFS_IOLOCK_SHIFT; | |
653c60b6 DC |
405 | } |
406 | ||
407 | if (lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) { | |
0952c818 DC |
408 | ASSERT(subclass <= XFS_MMAPLOCK_MAX_SUBCLASS); |
409 | class += subclass << XFS_MMAPLOCK_SHIFT; | |
653c60b6 DC |
410 | } |
411 | ||
0952c818 DC |
412 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) { |
413 | ASSERT(subclass <= XFS_ILOCK_MAX_SUBCLASS); | |
414 | class += subclass << XFS_ILOCK_SHIFT; | |
415 | } | |
c24b5dfa | 416 | |
0952c818 | 417 | return (lock_mode & ~XFS_LOCK_SUBCLASS_MASK) | class; |
c24b5dfa DC |
418 | } |
419 | ||
420 | /* | |
95afcf5c DC |
421 | * The following routine will lock n inodes in exclusive mode. We assume the |
422 | * caller calls us with the inodes in i_ino order. | |
c24b5dfa | 423 | * |
95afcf5c DC |
424 | * We need to detect deadlock where an inode that we lock is in the AIL and we |
425 | * start waiting for another inode that is locked by a thread in a long running | |
426 | * transaction (such as truncate). This can result in deadlock since the long | |
427 | * running trans might need to wait for the inode we just locked in order to | |
428 | * push the tail and free space in the log. | |
0952c818 DC |
429 | * |
430 | * xfs_lock_inodes() can only be used to lock one type of lock at a time - | |
431 | * the iolock, the mmaplock or the ilock, but not more than one at a time. If we | |
432 | * lock more than one at a time, lockdep will report false positives saying we | |
433 | * have violated locking orders. | |
c24b5dfa | 434 | */ |
0d5a75e9 | 435 | static void |
c24b5dfa DC |
436 | xfs_lock_inodes( |
437 | xfs_inode_t **ips, | |
438 | int inodes, | |
439 | uint lock_mode) | |
440 | { | |
441 | int attempts = 0, i, j, try_lock; | |
442 | xfs_log_item_t *lp; | |
443 | ||
0952c818 DC |
444 | /* |
445 | * Currently supports between 2 and 5 inodes with exclusive locking. We | |
446 | * support an arbitrary depth of locking here, but absolute limits on | |
447 | * inodes depend on the the type of locking and the limits placed by | |
448 | * lockdep annotations in xfs_lock_inumorder. These are all checked by | |
449 | * the asserts. | |
450 | */ | |
95afcf5c | 451 | ASSERT(ips && inodes >= 2 && inodes <= 5); |
0952c818 DC |
452 | ASSERT(lock_mode & (XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL | |
453 | XFS_ILOCK_EXCL)); | |
454 | ASSERT(!(lock_mode & (XFS_IOLOCK_SHARED | XFS_MMAPLOCK_SHARED | | |
455 | XFS_ILOCK_SHARED))); | |
456 | ASSERT(!(lock_mode & XFS_IOLOCK_EXCL) || | |
457 | inodes <= XFS_IOLOCK_MAX_SUBCLASS + 1); | |
458 | ASSERT(!(lock_mode & XFS_MMAPLOCK_EXCL) || | |
459 | inodes <= XFS_MMAPLOCK_MAX_SUBCLASS + 1); | |
460 | ASSERT(!(lock_mode & XFS_ILOCK_EXCL) || | |
461 | inodes <= XFS_ILOCK_MAX_SUBCLASS + 1); | |
462 | ||
463 | if (lock_mode & XFS_IOLOCK_EXCL) { | |
464 | ASSERT(!(lock_mode & (XFS_MMAPLOCK_EXCL | XFS_ILOCK_EXCL))); | |
465 | } else if (lock_mode & XFS_MMAPLOCK_EXCL) | |
466 | ASSERT(!(lock_mode & XFS_ILOCK_EXCL)); | |
c24b5dfa DC |
467 | |
468 | try_lock = 0; | |
469 | i = 0; | |
c24b5dfa DC |
470 | again: |
471 | for (; i < inodes; i++) { | |
472 | ASSERT(ips[i]); | |
473 | ||
95afcf5c | 474 | if (i && (ips[i] == ips[i - 1])) /* Already locked */ |
c24b5dfa DC |
475 | continue; |
476 | ||
477 | /* | |
95afcf5c DC |
478 | * If try_lock is not set yet, make sure all locked inodes are |
479 | * not in the AIL. If any are, set try_lock to be used later. | |
c24b5dfa | 480 | */ |
c24b5dfa DC |
481 | if (!try_lock) { |
482 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
483 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
95afcf5c | 484 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) |
c24b5dfa | 485 | try_lock++; |
c24b5dfa DC |
486 | } |
487 | } | |
488 | ||
489 | /* | |
490 | * If any of the previous locks we have locked is in the AIL, | |
491 | * we must TRY to get the second and subsequent locks. If | |
492 | * we can't get any, we must release all we have | |
493 | * and try again. | |
494 | */ | |
95afcf5c DC |
495 | if (!try_lock) { |
496 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); | |
497 | continue; | |
498 | } | |
499 | ||
500 | /* try_lock means we have an inode locked that is in the AIL. */ | |
501 | ASSERT(i != 0); | |
502 | if (xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) | |
503 | continue; | |
c24b5dfa | 504 | |
95afcf5c DC |
505 | /* |
506 | * Unlock all previous guys and try again. xfs_iunlock will try | |
507 | * to push the tail if the inode is in the AIL. | |
508 | */ | |
509 | attempts++; | |
510 | for (j = i - 1; j >= 0; j--) { | |
c24b5dfa | 511 | /* |
95afcf5c DC |
512 | * Check to see if we've already unlocked this one. Not |
513 | * the first one going back, and the inode ptr is the | |
514 | * same. | |
c24b5dfa | 515 | */ |
95afcf5c DC |
516 | if (j != (i - 1) && ips[j] == ips[j + 1]) |
517 | continue; | |
c24b5dfa | 518 | |
95afcf5c DC |
519 | xfs_iunlock(ips[j], lock_mode); |
520 | } | |
c24b5dfa | 521 | |
95afcf5c DC |
522 | if ((attempts % 5) == 0) { |
523 | delay(1); /* Don't just spin the CPU */ | |
c24b5dfa | 524 | #ifdef DEBUG |
95afcf5c | 525 | xfs_lock_delays++; |
c24b5dfa | 526 | #endif |
c24b5dfa | 527 | } |
95afcf5c DC |
528 | i = 0; |
529 | try_lock = 0; | |
530 | goto again; | |
c24b5dfa DC |
531 | } |
532 | ||
533 | #ifdef DEBUG | |
534 | if (attempts) { | |
535 | if (attempts < 5) xfs_small_retries++; | |
536 | else if (attempts < 100) xfs_middle_retries++; | |
537 | else xfs_lots_retries++; | |
538 | } else { | |
539 | xfs_locked_n++; | |
540 | } | |
541 | #endif | |
542 | } | |
543 | ||
544 | /* | |
653c60b6 DC |
545 | * xfs_lock_two_inodes() can only be used to lock one type of lock at a time - |
546 | * the iolock, the mmaplock or the ilock, but not more than one at a time. If we | |
547 | * lock more than one at a time, lockdep will report false positives saying we | |
548 | * have violated locking orders. | |
c24b5dfa DC |
549 | */ |
550 | void | |
551 | xfs_lock_two_inodes( | |
552 | xfs_inode_t *ip0, | |
553 | xfs_inode_t *ip1, | |
554 | uint lock_mode) | |
555 | { | |
556 | xfs_inode_t *temp; | |
557 | int attempts = 0; | |
558 | xfs_log_item_t *lp; | |
559 | ||
653c60b6 DC |
560 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) { |
561 | ASSERT(!(lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL))); | |
562 | ASSERT(!(lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); | |
563 | } else if (lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) | |
564 | ASSERT(!(lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); | |
565 | ||
c24b5dfa DC |
566 | ASSERT(ip0->i_ino != ip1->i_ino); |
567 | ||
568 | if (ip0->i_ino > ip1->i_ino) { | |
569 | temp = ip0; | |
570 | ip0 = ip1; | |
571 | ip1 = temp; | |
572 | } | |
573 | ||
574 | again: | |
575 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
576 | ||
577 | /* | |
578 | * If the first lock we have locked is in the AIL, we must TRY to get | |
579 | * the second lock. If we can't get it, we must release the first one | |
580 | * and try again. | |
581 | */ | |
582 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
583 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
584 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
585 | xfs_iunlock(ip0, lock_mode); | |
586 | if ((++attempts % 5) == 0) | |
587 | delay(1); /* Don't just spin the CPU */ | |
588 | goto again; | |
589 | } | |
590 | } else { | |
591 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
592 | } | |
593 | } | |
594 | ||
595 | ||
fa96acad DC |
596 | void |
597 | __xfs_iflock( | |
598 | struct xfs_inode *ip) | |
599 | { | |
600 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT); | |
601 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT); | |
602 | ||
603 | do { | |
604 | prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
605 | if (xfs_isiflocked(ip)) | |
606 | io_schedule(); | |
607 | } while (!xfs_iflock_nowait(ip)); | |
608 | ||
609 | finish_wait(wq, &wait.wait); | |
610 | } | |
611 | ||
1da177e4 LT |
612 | STATIC uint |
613 | _xfs_dic2xflags( | |
58f88ca2 DC |
614 | __uint16_t di_flags, |
615 | uint64_t di_flags2, | |
616 | bool has_attr) | |
1da177e4 LT |
617 | { |
618 | uint flags = 0; | |
619 | ||
620 | if (di_flags & XFS_DIFLAG_ANY) { | |
621 | if (di_flags & XFS_DIFLAG_REALTIME) | |
e7b89481 | 622 | flags |= FS_XFLAG_REALTIME; |
1da177e4 | 623 | if (di_flags & XFS_DIFLAG_PREALLOC) |
e7b89481 | 624 | flags |= FS_XFLAG_PREALLOC; |
1da177e4 | 625 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
e7b89481 | 626 | flags |= FS_XFLAG_IMMUTABLE; |
1da177e4 | 627 | if (di_flags & XFS_DIFLAG_APPEND) |
e7b89481 | 628 | flags |= FS_XFLAG_APPEND; |
1da177e4 | 629 | if (di_flags & XFS_DIFLAG_SYNC) |
e7b89481 | 630 | flags |= FS_XFLAG_SYNC; |
1da177e4 | 631 | if (di_flags & XFS_DIFLAG_NOATIME) |
e7b89481 | 632 | flags |= FS_XFLAG_NOATIME; |
1da177e4 | 633 | if (di_flags & XFS_DIFLAG_NODUMP) |
e7b89481 | 634 | flags |= FS_XFLAG_NODUMP; |
1da177e4 | 635 | if (di_flags & XFS_DIFLAG_RTINHERIT) |
e7b89481 | 636 | flags |= FS_XFLAG_RTINHERIT; |
1da177e4 | 637 | if (di_flags & XFS_DIFLAG_PROJINHERIT) |
e7b89481 | 638 | flags |= FS_XFLAG_PROJINHERIT; |
1da177e4 | 639 | if (di_flags & XFS_DIFLAG_NOSYMLINKS) |
e7b89481 | 640 | flags |= FS_XFLAG_NOSYMLINKS; |
dd9f438e | 641 | if (di_flags & XFS_DIFLAG_EXTSIZE) |
e7b89481 | 642 | flags |= FS_XFLAG_EXTSIZE; |
dd9f438e | 643 | if (di_flags & XFS_DIFLAG_EXTSZINHERIT) |
e7b89481 | 644 | flags |= FS_XFLAG_EXTSZINHERIT; |
d3446eac | 645 | if (di_flags & XFS_DIFLAG_NODEFRAG) |
e7b89481 | 646 | flags |= FS_XFLAG_NODEFRAG; |
2a82b8be | 647 | if (di_flags & XFS_DIFLAG_FILESTREAM) |
e7b89481 | 648 | flags |= FS_XFLAG_FILESTREAM; |
1da177e4 LT |
649 | } |
650 | ||
58f88ca2 DC |
651 | if (di_flags2 & XFS_DIFLAG2_ANY) { |
652 | if (di_flags2 & XFS_DIFLAG2_DAX) | |
653 | flags |= FS_XFLAG_DAX; | |
654 | } | |
655 | ||
656 | if (has_attr) | |
657 | flags |= FS_XFLAG_HASATTR; | |
658 | ||
1da177e4 LT |
659 | return flags; |
660 | } | |
661 | ||
662 | uint | |
663 | xfs_ip2xflags( | |
58f88ca2 | 664 | struct xfs_inode *ip) |
1da177e4 | 665 | { |
58f88ca2 | 666 | struct xfs_icdinode *dic = &ip->i_d; |
1da177e4 | 667 | |
58f88ca2 | 668 | return _xfs_dic2xflags(dic->di_flags, dic->di_flags2, XFS_IFORK_Q(ip)); |
1da177e4 LT |
669 | } |
670 | ||
c24b5dfa DC |
671 | /* |
672 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
673 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
674 | * ci_name->name will point to a the actual name (caller must free) or | |
675 | * will be set to NULL if an exact match is found. | |
676 | */ | |
677 | int | |
678 | xfs_lookup( | |
679 | xfs_inode_t *dp, | |
680 | struct xfs_name *name, | |
681 | xfs_inode_t **ipp, | |
682 | struct xfs_name *ci_name) | |
683 | { | |
684 | xfs_ino_t inum; | |
685 | int error; | |
c24b5dfa DC |
686 | |
687 | trace_xfs_lookup(dp, name); | |
688 | ||
689 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
2451337d | 690 | return -EIO; |
c24b5dfa | 691 | |
dbad7c99 | 692 | xfs_ilock(dp, XFS_IOLOCK_SHARED); |
c24b5dfa | 693 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
c24b5dfa | 694 | if (error) |
dbad7c99 | 695 | goto out_unlock; |
c24b5dfa DC |
696 | |
697 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); | |
698 | if (error) | |
699 | goto out_free_name; | |
700 | ||
dbad7c99 | 701 | xfs_iunlock(dp, XFS_IOLOCK_SHARED); |
c24b5dfa DC |
702 | return 0; |
703 | ||
704 | out_free_name: | |
705 | if (ci_name) | |
706 | kmem_free(ci_name->name); | |
dbad7c99 DC |
707 | out_unlock: |
708 | xfs_iunlock(dp, XFS_IOLOCK_SHARED); | |
c24b5dfa DC |
709 | *ipp = NULL; |
710 | return error; | |
711 | } | |
712 | ||
1da177e4 LT |
713 | /* |
714 | * Allocate an inode on disk and return a copy of its in-core version. | |
715 | * The in-core inode is locked exclusively. Set mode, nlink, and rdev | |
716 | * appropriately within the inode. The uid and gid for the inode are | |
717 | * set according to the contents of the given cred structure. | |
718 | * | |
719 | * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() | |
cd856db6 CM |
720 | * has a free inode available, call xfs_iget() to obtain the in-core |
721 | * version of the allocated inode. Finally, fill in the inode and | |
722 | * log its initial contents. In this case, ialloc_context would be | |
723 | * set to NULL. | |
1da177e4 | 724 | * |
cd856db6 CM |
725 | * If xfs_dialloc() does not have an available inode, it will replenish |
726 | * its supply by doing an allocation. Since we can only do one | |
727 | * allocation within a transaction without deadlocks, we must commit | |
728 | * the current transaction before returning the inode itself. | |
729 | * In this case, therefore, we will set ialloc_context and return. | |
1da177e4 LT |
730 | * The caller should then commit the current transaction, start a new |
731 | * transaction, and call xfs_ialloc() again to actually get the inode. | |
732 | * | |
733 | * To ensure that some other process does not grab the inode that | |
734 | * was allocated during the first call to xfs_ialloc(), this routine | |
735 | * also returns the [locked] bp pointing to the head of the freelist | |
736 | * as ialloc_context. The caller should hold this buffer across | |
737 | * the commit and pass it back into this routine on the second call. | |
b11f94d5 DC |
738 | * |
739 | * If we are allocating quota inodes, we do not have a parent inode | |
740 | * to attach to or associate with (i.e. pip == NULL) because they | |
741 | * are not linked into the directory structure - they are attached | |
742 | * directly to the superblock - and so have no parent. | |
1da177e4 | 743 | */ |
0d5a75e9 | 744 | static int |
1da177e4 LT |
745 | xfs_ialloc( |
746 | xfs_trans_t *tp, | |
747 | xfs_inode_t *pip, | |
576b1d67 | 748 | umode_t mode, |
31b084ae | 749 | xfs_nlink_t nlink, |
1da177e4 | 750 | xfs_dev_t rdev, |
6743099c | 751 | prid_t prid, |
1da177e4 LT |
752 | int okalloc, |
753 | xfs_buf_t **ialloc_context, | |
1da177e4 LT |
754 | xfs_inode_t **ipp) |
755 | { | |
93848a99 | 756 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 LT |
757 | xfs_ino_t ino; |
758 | xfs_inode_t *ip; | |
1da177e4 LT |
759 | uint flags; |
760 | int error; | |
e076b0f3 | 761 | struct timespec tv; |
3987848c | 762 | struct inode *inode; |
1da177e4 LT |
763 | |
764 | /* | |
765 | * Call the space management code to pick | |
766 | * the on-disk inode to be allocated. | |
767 | */ | |
b11f94d5 | 768 | error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc, |
08358906 | 769 | ialloc_context, &ino); |
bf904248 | 770 | if (error) |
1da177e4 | 771 | return error; |
08358906 | 772 | if (*ialloc_context || ino == NULLFSINO) { |
1da177e4 LT |
773 | *ipp = NULL; |
774 | return 0; | |
775 | } | |
776 | ASSERT(*ialloc_context == NULL); | |
777 | ||
778 | /* | |
779 | * Get the in-core inode with the lock held exclusively. | |
780 | * This is because we're setting fields here we need | |
781 | * to prevent others from looking at until we're done. | |
782 | */ | |
93848a99 | 783 | error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE, |
ec3ba85f | 784 | XFS_ILOCK_EXCL, &ip); |
bf904248 | 785 | if (error) |
1da177e4 | 786 | return error; |
1da177e4 | 787 | ASSERT(ip != NULL); |
3987848c | 788 | inode = VFS_I(ip); |
1da177e4 | 789 | |
263997a6 DC |
790 | /* |
791 | * We always convert v1 inodes to v2 now - we only support filesystems | |
792 | * with >= v2 inode capability, so there is no reason for ever leaving | |
793 | * an inode in v1 format. | |
794 | */ | |
795 | if (ip->i_d.di_version == 1) | |
796 | ip->i_d.di_version = 2; | |
797 | ||
c19b3b05 | 798 | inode->i_mode = mode; |
54d7b5c1 | 799 | set_nlink(inode, nlink); |
7aab1b28 DE |
800 | ip->i_d.di_uid = xfs_kuid_to_uid(current_fsuid()); |
801 | ip->i_d.di_gid = xfs_kgid_to_gid(current_fsgid()); | |
6743099c | 802 | xfs_set_projid(ip, prid); |
1da177e4 | 803 | |
bd186aa9 | 804 | if (pip && XFS_INHERIT_GID(pip)) { |
1da177e4 | 805 | ip->i_d.di_gid = pip->i_d.di_gid; |
c19b3b05 DC |
806 | if ((VFS_I(pip)->i_mode & S_ISGID) && S_ISDIR(mode)) |
807 | inode->i_mode |= S_ISGID; | |
1da177e4 LT |
808 | } |
809 | ||
810 | /* | |
811 | * If the group ID of the new file does not match the effective group | |
812 | * ID or one of the supplementary group IDs, the S_ISGID bit is cleared | |
813 | * (and only if the irix_sgid_inherit compatibility variable is set). | |
814 | */ | |
815 | if ((irix_sgid_inherit) && | |
c19b3b05 DC |
816 | (inode->i_mode & S_ISGID) && |
817 | (!in_group_p(xfs_gid_to_kgid(ip->i_d.di_gid)))) | |
818 | inode->i_mode &= ~S_ISGID; | |
1da177e4 LT |
819 | |
820 | ip->i_d.di_size = 0; | |
821 | ip->i_d.di_nextents = 0; | |
822 | ASSERT(ip->i_d.di_nblocks == 0); | |
dff35fd4 | 823 | |
e076b0f3 | 824 | tv = current_fs_time(mp->m_super); |
3987848c DC |
825 | inode->i_mtime = tv; |
826 | inode->i_atime = tv; | |
827 | inode->i_ctime = tv; | |
dff35fd4 | 828 | |
1da177e4 LT |
829 | ip->i_d.di_extsize = 0; |
830 | ip->i_d.di_dmevmask = 0; | |
831 | ip->i_d.di_dmstate = 0; | |
832 | ip->i_d.di_flags = 0; | |
93848a99 CH |
833 | |
834 | if (ip->i_d.di_version == 3) { | |
83e06f21 | 835 | inode->i_version = 1; |
93848a99 | 836 | ip->i_d.di_flags2 = 0; |
3987848c DC |
837 | ip->i_d.di_crtime.t_sec = (__int32_t)tv.tv_sec; |
838 | ip->i_d.di_crtime.t_nsec = (__int32_t)tv.tv_nsec; | |
93848a99 CH |
839 | } |
840 | ||
841 | ||
1da177e4 LT |
842 | flags = XFS_ILOG_CORE; |
843 | switch (mode & S_IFMT) { | |
844 | case S_IFIFO: | |
845 | case S_IFCHR: | |
846 | case S_IFBLK: | |
847 | case S_IFSOCK: | |
848 | ip->i_d.di_format = XFS_DINODE_FMT_DEV; | |
849 | ip->i_df.if_u2.if_rdev = rdev; | |
850 | ip->i_df.if_flags = 0; | |
851 | flags |= XFS_ILOG_DEV; | |
852 | break; | |
853 | case S_IFREG: | |
854 | case S_IFDIR: | |
b11f94d5 | 855 | if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) { |
58f88ca2 DC |
856 | uint64_t di_flags2 = 0; |
857 | uint di_flags = 0; | |
365ca83d | 858 | |
abbede1b | 859 | if (S_ISDIR(mode)) { |
365ca83d NS |
860 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
861 | di_flags |= XFS_DIFLAG_RTINHERIT; | |
dd9f438e NS |
862 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
863 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; | |
864 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
865 | } | |
9336e3a7 DC |
866 | if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
867 | di_flags |= XFS_DIFLAG_PROJINHERIT; | |
abbede1b | 868 | } else if (S_ISREG(mode)) { |
613d7043 | 869 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
365ca83d | 870 | di_flags |= XFS_DIFLAG_REALTIME; |
dd9f438e NS |
871 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
872 | di_flags |= XFS_DIFLAG_EXTSIZE; | |
873 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
874 | } | |
1da177e4 LT |
875 | } |
876 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) && | |
877 | xfs_inherit_noatime) | |
365ca83d | 878 | di_flags |= XFS_DIFLAG_NOATIME; |
1da177e4 LT |
879 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) && |
880 | xfs_inherit_nodump) | |
365ca83d | 881 | di_flags |= XFS_DIFLAG_NODUMP; |
1da177e4 LT |
882 | if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) && |
883 | xfs_inherit_sync) | |
365ca83d | 884 | di_flags |= XFS_DIFLAG_SYNC; |
1da177e4 LT |
885 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) && |
886 | xfs_inherit_nosymlinks) | |
365ca83d | 887 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
d3446eac BN |
888 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) && |
889 | xfs_inherit_nodefrag) | |
890 | di_flags |= XFS_DIFLAG_NODEFRAG; | |
2a82b8be DC |
891 | if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM) |
892 | di_flags |= XFS_DIFLAG_FILESTREAM; | |
58f88ca2 DC |
893 | if (pip->i_d.di_flags2 & XFS_DIFLAG2_DAX) |
894 | di_flags2 |= XFS_DIFLAG2_DAX; | |
895 | ||
365ca83d | 896 | ip->i_d.di_flags |= di_flags; |
58f88ca2 | 897 | ip->i_d.di_flags2 |= di_flags2; |
1da177e4 LT |
898 | } |
899 | /* FALLTHROUGH */ | |
900 | case S_IFLNK: | |
901 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; | |
902 | ip->i_df.if_flags = XFS_IFEXTENTS; | |
903 | ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0; | |
904 | ip->i_df.if_u1.if_extents = NULL; | |
905 | break; | |
906 | default: | |
907 | ASSERT(0); | |
908 | } | |
909 | /* | |
910 | * Attribute fork settings for new inode. | |
911 | */ | |
912 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
913 | ip->i_d.di_anextents = 0; | |
914 | ||
915 | /* | |
916 | * Log the new values stuffed into the inode. | |
917 | */ | |
ddc3415a | 918 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
919 | xfs_trans_log_inode(tp, ip, flags); |
920 | ||
58c90473 | 921 | /* now that we have an i_mode we can setup the inode structure */ |
41be8bed | 922 | xfs_setup_inode(ip); |
1da177e4 LT |
923 | |
924 | *ipp = ip; | |
925 | return 0; | |
926 | } | |
927 | ||
e546cb79 DC |
928 | /* |
929 | * Allocates a new inode from disk and return a pointer to the | |
930 | * incore copy. This routine will internally commit the current | |
931 | * transaction and allocate a new one if the Space Manager needed | |
932 | * to do an allocation to replenish the inode free-list. | |
933 | * | |
934 | * This routine is designed to be called from xfs_create and | |
935 | * xfs_create_dir. | |
936 | * | |
937 | */ | |
938 | int | |
939 | xfs_dir_ialloc( | |
940 | xfs_trans_t **tpp, /* input: current transaction; | |
941 | output: may be a new transaction. */ | |
942 | xfs_inode_t *dp, /* directory within whose allocate | |
943 | the inode. */ | |
944 | umode_t mode, | |
945 | xfs_nlink_t nlink, | |
946 | xfs_dev_t rdev, | |
947 | prid_t prid, /* project id */ | |
948 | int okalloc, /* ok to allocate new space */ | |
949 | xfs_inode_t **ipp, /* pointer to inode; it will be | |
950 | locked. */ | |
951 | int *committed) | |
952 | ||
953 | { | |
954 | xfs_trans_t *tp; | |
e546cb79 DC |
955 | xfs_inode_t *ip; |
956 | xfs_buf_t *ialloc_context = NULL; | |
957 | int code; | |
e546cb79 DC |
958 | void *dqinfo; |
959 | uint tflags; | |
960 | ||
961 | tp = *tpp; | |
962 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
963 | ||
964 | /* | |
965 | * xfs_ialloc will return a pointer to an incore inode if | |
966 | * the Space Manager has an available inode on the free | |
967 | * list. Otherwise, it will do an allocation and replenish | |
968 | * the freelist. Since we can only do one allocation per | |
969 | * transaction without deadlocks, we will need to commit the | |
970 | * current transaction and start a new one. We will then | |
971 | * need to call xfs_ialloc again to get the inode. | |
972 | * | |
973 | * If xfs_ialloc did an allocation to replenish the freelist, | |
974 | * it returns the bp containing the head of the freelist as | |
975 | * ialloc_context. We will hold a lock on it across the | |
976 | * transaction commit so that no other process can steal | |
977 | * the inode(s) that we've just allocated. | |
978 | */ | |
979 | code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, okalloc, | |
980 | &ialloc_context, &ip); | |
981 | ||
982 | /* | |
983 | * Return an error if we were unable to allocate a new inode. | |
984 | * This should only happen if we run out of space on disk or | |
985 | * encounter a disk error. | |
986 | */ | |
987 | if (code) { | |
988 | *ipp = NULL; | |
989 | return code; | |
990 | } | |
991 | if (!ialloc_context && !ip) { | |
992 | *ipp = NULL; | |
2451337d | 993 | return -ENOSPC; |
e546cb79 DC |
994 | } |
995 | ||
996 | /* | |
997 | * If the AGI buffer is non-NULL, then we were unable to get an | |
998 | * inode in one operation. We need to commit the current | |
999 | * transaction and call xfs_ialloc() again. It is guaranteed | |
1000 | * to succeed the second time. | |
1001 | */ | |
1002 | if (ialloc_context) { | |
1003 | /* | |
1004 | * Normally, xfs_trans_commit releases all the locks. | |
1005 | * We call bhold to hang on to the ialloc_context across | |
1006 | * the commit. Holding this buffer prevents any other | |
1007 | * processes from doing any allocations in this | |
1008 | * allocation group. | |
1009 | */ | |
1010 | xfs_trans_bhold(tp, ialloc_context); | |
e546cb79 DC |
1011 | |
1012 | /* | |
1013 | * We want the quota changes to be associated with the next | |
1014 | * transaction, NOT this one. So, detach the dqinfo from this | |
1015 | * and attach it to the next transaction. | |
1016 | */ | |
1017 | dqinfo = NULL; | |
1018 | tflags = 0; | |
1019 | if (tp->t_dqinfo) { | |
1020 | dqinfo = (void *)tp->t_dqinfo; | |
1021 | tp->t_dqinfo = NULL; | |
1022 | tflags = tp->t_flags & XFS_TRANS_DQ_DIRTY; | |
1023 | tp->t_flags &= ~(XFS_TRANS_DQ_DIRTY); | |
1024 | } | |
1025 | ||
6e3e6d55 | 1026 | code = xfs_trans_roll(&tp, NULL); |
2e6db6c4 | 1027 | if (committed != NULL) |
e546cb79 | 1028 | *committed = 1; |
3d3c8b52 | 1029 | |
e546cb79 DC |
1030 | /* |
1031 | * Re-attach the quota info that we detached from prev trx. | |
1032 | */ | |
1033 | if (dqinfo) { | |
1034 | tp->t_dqinfo = dqinfo; | |
1035 | tp->t_flags |= tflags; | |
1036 | } | |
1037 | ||
1038 | if (code) { | |
1039 | xfs_buf_relse(ialloc_context); | |
2e6db6c4 | 1040 | *tpp = tp; |
e546cb79 DC |
1041 | *ipp = NULL; |
1042 | return code; | |
1043 | } | |
1044 | xfs_trans_bjoin(tp, ialloc_context); | |
1045 | ||
1046 | /* | |
1047 | * Call ialloc again. Since we've locked out all | |
1048 | * other allocations in this allocation group, | |
1049 | * this call should always succeed. | |
1050 | */ | |
1051 | code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, | |
1052 | okalloc, &ialloc_context, &ip); | |
1053 | ||
1054 | /* | |
1055 | * If we get an error at this point, return to the caller | |
1056 | * so that the current transaction can be aborted. | |
1057 | */ | |
1058 | if (code) { | |
1059 | *tpp = tp; | |
1060 | *ipp = NULL; | |
1061 | return code; | |
1062 | } | |
1063 | ASSERT(!ialloc_context && ip); | |
1064 | ||
1065 | } else { | |
1066 | if (committed != NULL) | |
1067 | *committed = 0; | |
1068 | } | |
1069 | ||
1070 | *ipp = ip; | |
1071 | *tpp = tp; | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | /* | |
54d7b5c1 DC |
1077 | * Decrement the link count on an inode & log the change. If this causes the |
1078 | * link count to go to zero, move the inode to AGI unlinked list so that it can | |
1079 | * be freed when the last active reference goes away via xfs_inactive(). | |
e546cb79 | 1080 | */ |
0d5a75e9 | 1081 | static int /* error */ |
e546cb79 DC |
1082 | xfs_droplink( |
1083 | xfs_trans_t *tp, | |
1084 | xfs_inode_t *ip) | |
1085 | { | |
e546cb79 DC |
1086 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
1087 | ||
e546cb79 DC |
1088 | drop_nlink(VFS_I(ip)); |
1089 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1090 | ||
54d7b5c1 DC |
1091 | if (VFS_I(ip)->i_nlink) |
1092 | return 0; | |
1093 | ||
1094 | return xfs_iunlink(tp, ip); | |
e546cb79 DC |
1095 | } |
1096 | ||
e546cb79 DC |
1097 | /* |
1098 | * Increment the link count on an inode & log the change. | |
1099 | */ | |
0d5a75e9 | 1100 | static int |
e546cb79 DC |
1101 | xfs_bumplink( |
1102 | xfs_trans_t *tp, | |
1103 | xfs_inode_t *ip) | |
1104 | { | |
1105 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); | |
1106 | ||
263997a6 | 1107 | ASSERT(ip->i_d.di_version > 1); |
e546cb79 | 1108 | inc_nlink(VFS_I(ip)); |
e546cb79 DC |
1109 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1110 | return 0; | |
1111 | } | |
1112 | ||
c24b5dfa DC |
1113 | int |
1114 | xfs_create( | |
1115 | xfs_inode_t *dp, | |
1116 | struct xfs_name *name, | |
1117 | umode_t mode, | |
1118 | xfs_dev_t rdev, | |
1119 | xfs_inode_t **ipp) | |
1120 | { | |
1121 | int is_dir = S_ISDIR(mode); | |
1122 | struct xfs_mount *mp = dp->i_mount; | |
1123 | struct xfs_inode *ip = NULL; | |
1124 | struct xfs_trans *tp = NULL; | |
1125 | int error; | |
2c3234d1 | 1126 | struct xfs_defer_ops dfops; |
c24b5dfa DC |
1127 | xfs_fsblock_t first_block; |
1128 | bool unlock_dp_on_error = false; | |
c24b5dfa DC |
1129 | prid_t prid; |
1130 | struct xfs_dquot *udqp = NULL; | |
1131 | struct xfs_dquot *gdqp = NULL; | |
1132 | struct xfs_dquot *pdqp = NULL; | |
062647a8 | 1133 | struct xfs_trans_res *tres; |
c24b5dfa | 1134 | uint resblks; |
c24b5dfa DC |
1135 | |
1136 | trace_xfs_create(dp, name); | |
1137 | ||
1138 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1139 | return -EIO; |
c24b5dfa | 1140 | |
163467d3 | 1141 | prid = xfs_get_initial_prid(dp); |
c24b5dfa DC |
1142 | |
1143 | /* | |
1144 | * Make sure that we have allocated dquot(s) on disk. | |
1145 | */ | |
7aab1b28 DE |
1146 | error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()), |
1147 | xfs_kgid_to_gid(current_fsgid()), prid, | |
c24b5dfa DC |
1148 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, |
1149 | &udqp, &gdqp, &pdqp); | |
1150 | if (error) | |
1151 | return error; | |
1152 | ||
1153 | if (is_dir) { | |
1154 | rdev = 0; | |
1155 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
062647a8 | 1156 | tres = &M_RES(mp)->tr_mkdir; |
c24b5dfa DC |
1157 | } else { |
1158 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
062647a8 | 1159 | tres = &M_RES(mp)->tr_create; |
c24b5dfa DC |
1160 | } |
1161 | ||
c24b5dfa DC |
1162 | /* |
1163 | * Initially assume that the file does not exist and | |
1164 | * reserve the resources for that case. If that is not | |
1165 | * the case we'll drop the one we have and get a more | |
1166 | * appropriate transaction later. | |
1167 | */ | |
253f4911 | 1168 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); |
2451337d | 1169 | if (error == -ENOSPC) { |
c24b5dfa DC |
1170 | /* flush outstanding delalloc blocks and retry */ |
1171 | xfs_flush_inodes(mp); | |
253f4911 | 1172 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); |
c24b5dfa | 1173 | } |
2451337d | 1174 | if (error == -ENOSPC) { |
c24b5dfa DC |
1175 | /* No space at all so try a "no-allocation" reservation */ |
1176 | resblks = 0; | |
253f4911 | 1177 | error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp); |
c24b5dfa | 1178 | } |
4906e215 | 1179 | if (error) |
253f4911 | 1180 | goto out_release_inode; |
c24b5dfa | 1181 | |
dbad7c99 DC |
1182 | xfs_ilock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL | |
1183 | XFS_IOLOCK_PARENT | XFS_ILOCK_PARENT); | |
c24b5dfa DC |
1184 | unlock_dp_on_error = true; |
1185 | ||
2c3234d1 | 1186 | xfs_defer_init(&dfops, &first_block); |
c24b5dfa DC |
1187 | |
1188 | /* | |
1189 | * Reserve disk quota and the inode. | |
1190 | */ | |
1191 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, | |
1192 | pdqp, resblks, 1, 0); | |
1193 | if (error) | |
1194 | goto out_trans_cancel; | |
1195 | ||
94f3cad5 ES |
1196 | if (!resblks) { |
1197 | error = xfs_dir_canenter(tp, dp, name); | |
1198 | if (error) | |
1199 | goto out_trans_cancel; | |
1200 | } | |
c24b5dfa DC |
1201 | |
1202 | /* | |
1203 | * A newly created regular or special file just has one directory | |
1204 | * entry pointing to them, but a directory also the "." entry | |
1205 | * pointing to itself. | |
1206 | */ | |
1207 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, | |
f6106efa | 1208 | prid, resblks > 0, &ip, NULL); |
d6077aa3 | 1209 | if (error) |
4906e215 | 1210 | goto out_trans_cancel; |
c24b5dfa DC |
1211 | |
1212 | /* | |
1213 | * Now we join the directory inode to the transaction. We do not do it | |
1214 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1215 | * (and release all the locks). An error from here on will result in | |
1216 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1217 | * error path. | |
1218 | */ | |
dbad7c99 | 1219 | xfs_trans_ijoin(tp, dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
c24b5dfa DC |
1220 | unlock_dp_on_error = false; |
1221 | ||
1222 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, | |
2c3234d1 | 1223 | &first_block, &dfops, resblks ? |
c24b5dfa DC |
1224 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
1225 | if (error) { | |
2451337d | 1226 | ASSERT(error != -ENOSPC); |
4906e215 | 1227 | goto out_trans_cancel; |
c24b5dfa DC |
1228 | } |
1229 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1230 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1231 | ||
1232 | if (is_dir) { | |
1233 | error = xfs_dir_init(tp, ip, dp); | |
1234 | if (error) | |
1235 | goto out_bmap_cancel; | |
1236 | ||
1237 | error = xfs_bumplink(tp, dp); | |
1238 | if (error) | |
1239 | goto out_bmap_cancel; | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * If this is a synchronous mount, make sure that the | |
1244 | * create transaction goes to disk before returning to | |
1245 | * the user. | |
1246 | */ | |
1247 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
1248 | xfs_trans_set_sync(tp); | |
1249 | ||
1250 | /* | |
1251 | * Attach the dquot(s) to the inodes and modify them incore. | |
1252 | * These ids of the inode couldn't have changed since the new | |
1253 | * inode has been locked ever since it was created. | |
1254 | */ | |
1255 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); | |
1256 | ||
2c3234d1 | 1257 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa DC |
1258 | if (error) |
1259 | goto out_bmap_cancel; | |
1260 | ||
70393313 | 1261 | error = xfs_trans_commit(tp); |
c24b5dfa DC |
1262 | if (error) |
1263 | goto out_release_inode; | |
1264 | ||
1265 | xfs_qm_dqrele(udqp); | |
1266 | xfs_qm_dqrele(gdqp); | |
1267 | xfs_qm_dqrele(pdqp); | |
1268 | ||
1269 | *ipp = ip; | |
1270 | return 0; | |
1271 | ||
1272 | out_bmap_cancel: | |
2c3234d1 | 1273 | xfs_defer_cancel(&dfops); |
c24b5dfa | 1274 | out_trans_cancel: |
4906e215 | 1275 | xfs_trans_cancel(tp); |
c24b5dfa DC |
1276 | out_release_inode: |
1277 | /* | |
58c90473 DC |
1278 | * Wait until after the current transaction is aborted to finish the |
1279 | * setup of the inode and release the inode. This prevents recursive | |
1280 | * transactions and deadlocks from xfs_inactive. | |
c24b5dfa | 1281 | */ |
58c90473 DC |
1282 | if (ip) { |
1283 | xfs_finish_inode_setup(ip); | |
c24b5dfa | 1284 | IRELE(ip); |
58c90473 | 1285 | } |
c24b5dfa DC |
1286 | |
1287 | xfs_qm_dqrele(udqp); | |
1288 | xfs_qm_dqrele(gdqp); | |
1289 | xfs_qm_dqrele(pdqp); | |
1290 | ||
1291 | if (unlock_dp_on_error) | |
dbad7c99 | 1292 | xfs_iunlock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
c24b5dfa DC |
1293 | return error; |
1294 | } | |
1295 | ||
99b6436b ZYW |
1296 | int |
1297 | xfs_create_tmpfile( | |
1298 | struct xfs_inode *dp, | |
1299 | struct dentry *dentry, | |
330033d6 BF |
1300 | umode_t mode, |
1301 | struct xfs_inode **ipp) | |
99b6436b ZYW |
1302 | { |
1303 | struct xfs_mount *mp = dp->i_mount; | |
1304 | struct xfs_inode *ip = NULL; | |
1305 | struct xfs_trans *tp = NULL; | |
1306 | int error; | |
99b6436b ZYW |
1307 | prid_t prid; |
1308 | struct xfs_dquot *udqp = NULL; | |
1309 | struct xfs_dquot *gdqp = NULL; | |
1310 | struct xfs_dquot *pdqp = NULL; | |
1311 | struct xfs_trans_res *tres; | |
1312 | uint resblks; | |
1313 | ||
1314 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1315 | return -EIO; |
99b6436b ZYW |
1316 | |
1317 | prid = xfs_get_initial_prid(dp); | |
1318 | ||
1319 | /* | |
1320 | * Make sure that we have allocated dquot(s) on disk. | |
1321 | */ | |
1322 | error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()), | |
1323 | xfs_kgid_to_gid(current_fsgid()), prid, | |
1324 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
1325 | &udqp, &gdqp, &pdqp); | |
1326 | if (error) | |
1327 | return error; | |
1328 | ||
1329 | resblks = XFS_IALLOC_SPACE_RES(mp); | |
99b6436b | 1330 | tres = &M_RES(mp)->tr_create_tmpfile; |
253f4911 CH |
1331 | |
1332 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); | |
2451337d | 1333 | if (error == -ENOSPC) { |
99b6436b ZYW |
1334 | /* No space at all so try a "no-allocation" reservation */ |
1335 | resblks = 0; | |
253f4911 | 1336 | error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp); |
99b6436b | 1337 | } |
4906e215 | 1338 | if (error) |
253f4911 | 1339 | goto out_release_inode; |
99b6436b ZYW |
1340 | |
1341 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, | |
1342 | pdqp, resblks, 1, 0); | |
1343 | if (error) | |
1344 | goto out_trans_cancel; | |
1345 | ||
1346 | error = xfs_dir_ialloc(&tp, dp, mode, 1, 0, | |
1347 | prid, resblks > 0, &ip, NULL); | |
d6077aa3 | 1348 | if (error) |
4906e215 | 1349 | goto out_trans_cancel; |
99b6436b ZYW |
1350 | |
1351 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
1352 | xfs_trans_set_sync(tp); | |
1353 | ||
1354 | /* | |
1355 | * Attach the dquot(s) to the inodes and modify them incore. | |
1356 | * These ids of the inode couldn't have changed since the new | |
1357 | * inode has been locked ever since it was created. | |
1358 | */ | |
1359 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); | |
1360 | ||
99b6436b ZYW |
1361 | error = xfs_iunlink(tp, ip); |
1362 | if (error) | |
4906e215 | 1363 | goto out_trans_cancel; |
99b6436b | 1364 | |
70393313 | 1365 | error = xfs_trans_commit(tp); |
99b6436b ZYW |
1366 | if (error) |
1367 | goto out_release_inode; | |
1368 | ||
1369 | xfs_qm_dqrele(udqp); | |
1370 | xfs_qm_dqrele(gdqp); | |
1371 | xfs_qm_dqrele(pdqp); | |
1372 | ||
330033d6 | 1373 | *ipp = ip; |
99b6436b ZYW |
1374 | return 0; |
1375 | ||
99b6436b | 1376 | out_trans_cancel: |
4906e215 | 1377 | xfs_trans_cancel(tp); |
99b6436b ZYW |
1378 | out_release_inode: |
1379 | /* | |
58c90473 DC |
1380 | * Wait until after the current transaction is aborted to finish the |
1381 | * setup of the inode and release the inode. This prevents recursive | |
1382 | * transactions and deadlocks from xfs_inactive. | |
99b6436b | 1383 | */ |
58c90473 DC |
1384 | if (ip) { |
1385 | xfs_finish_inode_setup(ip); | |
99b6436b | 1386 | IRELE(ip); |
58c90473 | 1387 | } |
99b6436b ZYW |
1388 | |
1389 | xfs_qm_dqrele(udqp); | |
1390 | xfs_qm_dqrele(gdqp); | |
1391 | xfs_qm_dqrele(pdqp); | |
1392 | ||
1393 | return error; | |
1394 | } | |
1395 | ||
c24b5dfa DC |
1396 | int |
1397 | xfs_link( | |
1398 | xfs_inode_t *tdp, | |
1399 | xfs_inode_t *sip, | |
1400 | struct xfs_name *target_name) | |
1401 | { | |
1402 | xfs_mount_t *mp = tdp->i_mount; | |
1403 | xfs_trans_t *tp; | |
1404 | int error; | |
2c3234d1 | 1405 | struct xfs_defer_ops dfops; |
c24b5dfa | 1406 | xfs_fsblock_t first_block; |
c24b5dfa DC |
1407 | int resblks; |
1408 | ||
1409 | trace_xfs_link(tdp, target_name); | |
1410 | ||
c19b3b05 | 1411 | ASSERT(!S_ISDIR(VFS_I(sip)->i_mode)); |
c24b5dfa DC |
1412 | |
1413 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1414 | return -EIO; |
c24b5dfa DC |
1415 | |
1416 | error = xfs_qm_dqattach(sip, 0); | |
1417 | if (error) | |
1418 | goto std_return; | |
1419 | ||
1420 | error = xfs_qm_dqattach(tdp, 0); | |
1421 | if (error) | |
1422 | goto std_return; | |
1423 | ||
c24b5dfa | 1424 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
253f4911 | 1425 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, resblks, 0, 0, &tp); |
2451337d | 1426 | if (error == -ENOSPC) { |
c24b5dfa | 1427 | resblks = 0; |
253f4911 | 1428 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, 0, 0, 0, &tp); |
c24b5dfa | 1429 | } |
4906e215 | 1430 | if (error) |
253f4911 | 1431 | goto std_return; |
c24b5dfa | 1432 | |
dbad7c99 | 1433 | xfs_ilock(tdp, XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); |
c24b5dfa DC |
1434 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1435 | ||
1436 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); | |
dbad7c99 | 1437 | xfs_trans_ijoin(tp, tdp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
c24b5dfa DC |
1438 | |
1439 | /* | |
1440 | * If we are using project inheritance, we only allow hard link | |
1441 | * creation in our tree when the project IDs are the same; else | |
1442 | * the tree quota mechanism could be circumvented. | |
1443 | */ | |
1444 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
1445 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { | |
2451337d | 1446 | error = -EXDEV; |
c24b5dfa DC |
1447 | goto error_return; |
1448 | } | |
1449 | ||
94f3cad5 ES |
1450 | if (!resblks) { |
1451 | error = xfs_dir_canenter(tp, tdp, target_name); | |
1452 | if (error) | |
1453 | goto error_return; | |
1454 | } | |
c24b5dfa | 1455 | |
2c3234d1 | 1456 | xfs_defer_init(&dfops, &first_block); |
c24b5dfa | 1457 | |
54d7b5c1 DC |
1458 | /* |
1459 | * Handle initial link state of O_TMPFILE inode | |
1460 | */ | |
1461 | if (VFS_I(sip)->i_nlink == 0) { | |
ab297431 ZYW |
1462 | error = xfs_iunlink_remove(tp, sip); |
1463 | if (error) | |
4906e215 | 1464 | goto error_return; |
ab297431 ZYW |
1465 | } |
1466 | ||
c24b5dfa | 1467 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2c3234d1 | 1468 | &first_block, &dfops, resblks); |
c24b5dfa | 1469 | if (error) |
4906e215 | 1470 | goto error_return; |
c24b5dfa DC |
1471 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1472 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); | |
1473 | ||
1474 | error = xfs_bumplink(tp, sip); | |
1475 | if (error) | |
4906e215 | 1476 | goto error_return; |
c24b5dfa DC |
1477 | |
1478 | /* | |
1479 | * If this is a synchronous mount, make sure that the | |
1480 | * link transaction goes to disk before returning to | |
1481 | * the user. | |
1482 | */ | |
f6106efa | 1483 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
c24b5dfa | 1484 | xfs_trans_set_sync(tp); |
c24b5dfa | 1485 | |
2c3234d1 | 1486 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa | 1487 | if (error) { |
2c3234d1 | 1488 | xfs_defer_cancel(&dfops); |
4906e215 | 1489 | goto error_return; |
c24b5dfa DC |
1490 | } |
1491 | ||
70393313 | 1492 | return xfs_trans_commit(tp); |
c24b5dfa | 1493 | |
c24b5dfa | 1494 | error_return: |
4906e215 | 1495 | xfs_trans_cancel(tp); |
c24b5dfa DC |
1496 | std_return: |
1497 | return error; | |
1498 | } | |
1499 | ||
1da177e4 | 1500 | /* |
8f04c47a CH |
1501 | * Free up the underlying blocks past new_size. The new size must be smaller |
1502 | * than the current size. This routine can be used both for the attribute and | |
1503 | * data fork, and does not modify the inode size, which is left to the caller. | |
1da177e4 | 1504 | * |
f6485057 DC |
1505 | * The transaction passed to this routine must have made a permanent log |
1506 | * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the | |
1507 | * given transaction and start new ones, so make sure everything involved in | |
1508 | * the transaction is tidy before calling here. Some transaction will be | |
1509 | * returned to the caller to be committed. The incoming transaction must | |
1510 | * already include the inode, and both inode locks must be held exclusively. | |
1511 | * The inode must also be "held" within the transaction. On return the inode | |
1512 | * will be "held" within the returned transaction. This routine does NOT | |
1513 | * require any disk space to be reserved for it within the transaction. | |
1da177e4 | 1514 | * |
f6485057 DC |
1515 | * If we get an error, we must return with the inode locked and linked into the |
1516 | * current transaction. This keeps things simple for the higher level code, | |
1517 | * because it always knows that the inode is locked and held in the transaction | |
1518 | * that returns to it whether errors occur or not. We don't mark the inode | |
1519 | * dirty on error so that transactions can be easily aborted if possible. | |
1da177e4 LT |
1520 | */ |
1521 | int | |
8f04c47a CH |
1522 | xfs_itruncate_extents( |
1523 | struct xfs_trans **tpp, | |
1524 | struct xfs_inode *ip, | |
1525 | int whichfork, | |
1526 | xfs_fsize_t new_size) | |
1da177e4 | 1527 | { |
8f04c47a CH |
1528 | struct xfs_mount *mp = ip->i_mount; |
1529 | struct xfs_trans *tp = *tpp; | |
2c3234d1 | 1530 | struct xfs_defer_ops dfops; |
8f04c47a CH |
1531 | xfs_fsblock_t first_block; |
1532 | xfs_fileoff_t first_unmap_block; | |
1533 | xfs_fileoff_t last_block; | |
1534 | xfs_filblks_t unmap_len; | |
8f04c47a CH |
1535 | int error = 0; |
1536 | int done = 0; | |
1da177e4 | 1537 | |
0b56185b CH |
1538 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1539 | ASSERT(!atomic_read(&VFS_I(ip)->i_count) || | |
1540 | xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
ce7ae151 | 1541 | ASSERT(new_size <= XFS_ISIZE(ip)); |
8f04c47a | 1542 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
1da177e4 | 1543 | ASSERT(ip->i_itemp != NULL); |
898621d5 | 1544 | ASSERT(ip->i_itemp->ili_lock_flags == 0); |
8f04c47a | 1545 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); |
1da177e4 | 1546 | |
673e8e59 CH |
1547 | trace_xfs_itruncate_extents_start(ip, new_size); |
1548 | ||
1da177e4 LT |
1549 | /* |
1550 | * Since it is possible for space to become allocated beyond | |
1551 | * the end of the file (in a crash where the space is allocated | |
1552 | * but the inode size is not yet updated), simply remove any | |
1553 | * blocks which show up between the new EOF and the maximum | |
1554 | * possible file size. If the first block to be removed is | |
1555 | * beyond the maximum file size (ie it is the same as last_block), | |
1556 | * then there is nothing to do. | |
1557 | */ | |
8f04c47a | 1558 | first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
32972383 | 1559 | last_block = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
8f04c47a CH |
1560 | if (first_unmap_block == last_block) |
1561 | return 0; | |
1562 | ||
1563 | ASSERT(first_unmap_block < last_block); | |
1564 | unmap_len = last_block - first_unmap_block + 1; | |
1da177e4 | 1565 | while (!done) { |
2c3234d1 | 1566 | xfs_defer_init(&dfops, &first_block); |
8f04c47a | 1567 | error = xfs_bunmapi(tp, ip, |
3e57ecf6 | 1568 | first_unmap_block, unmap_len, |
8f04c47a | 1569 | xfs_bmapi_aflag(whichfork), |
1da177e4 | 1570 | XFS_ITRUNC_MAX_EXTENTS, |
2c3234d1 | 1571 | &first_block, &dfops, |
b4e9181e | 1572 | &done); |
8f04c47a CH |
1573 | if (error) |
1574 | goto out_bmap_cancel; | |
1da177e4 LT |
1575 | |
1576 | /* | |
1577 | * Duplicate the transaction that has the permanent | |
1578 | * reservation and commit the old transaction. | |
1579 | */ | |
2c3234d1 | 1580 | error = xfs_defer_finish(&tp, &dfops, ip); |
8f04c47a CH |
1581 | if (error) |
1582 | goto out_bmap_cancel; | |
1da177e4 | 1583 | |
2e6db6c4 | 1584 | error = xfs_trans_roll(&tp, ip); |
f6485057 | 1585 | if (error) |
8f04c47a | 1586 | goto out; |
1da177e4 | 1587 | } |
8f04c47a | 1588 | |
673e8e59 CH |
1589 | /* |
1590 | * Always re-log the inode so that our permanent transaction can keep | |
1591 | * on rolling it forward in the log. | |
1592 | */ | |
1593 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1594 | ||
1595 | trace_xfs_itruncate_extents_end(ip, new_size); | |
1596 | ||
8f04c47a CH |
1597 | out: |
1598 | *tpp = tp; | |
1599 | return error; | |
1600 | out_bmap_cancel: | |
1da177e4 | 1601 | /* |
8f04c47a CH |
1602 | * If the bunmapi call encounters an error, return to the caller where |
1603 | * the transaction can be properly aborted. We just need to make sure | |
1604 | * we're not holding any resources that we were not when we came in. | |
1da177e4 | 1605 | */ |
2c3234d1 | 1606 | xfs_defer_cancel(&dfops); |
8f04c47a CH |
1607 | goto out; |
1608 | } | |
1609 | ||
c24b5dfa DC |
1610 | int |
1611 | xfs_release( | |
1612 | xfs_inode_t *ip) | |
1613 | { | |
1614 | xfs_mount_t *mp = ip->i_mount; | |
1615 | int error; | |
1616 | ||
c19b3b05 | 1617 | if (!S_ISREG(VFS_I(ip)->i_mode) || (VFS_I(ip)->i_mode == 0)) |
c24b5dfa DC |
1618 | return 0; |
1619 | ||
1620 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
1621 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
1622 | return 0; | |
1623 | ||
1624 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1625 | int truncated; | |
1626 | ||
c24b5dfa DC |
1627 | /* |
1628 | * If we previously truncated this file and removed old data | |
1629 | * in the process, we want to initiate "early" writeout on | |
1630 | * the last close. This is an attempt to combat the notorious | |
1631 | * NULL files problem which is particularly noticeable from a | |
1632 | * truncate down, buffered (re-)write (delalloc), followed by | |
1633 | * a crash. What we are effectively doing here is | |
1634 | * significantly reducing the time window where we'd otherwise | |
1635 | * be exposed to that problem. | |
1636 | */ | |
1637 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); | |
1638 | if (truncated) { | |
1639 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
eac152b4 | 1640 | if (ip->i_delayed_blks > 0) { |
2451337d | 1641 | error = filemap_flush(VFS_I(ip)->i_mapping); |
c24b5dfa DC |
1642 | if (error) |
1643 | return error; | |
1644 | } | |
1645 | } | |
1646 | } | |
1647 | ||
54d7b5c1 | 1648 | if (VFS_I(ip)->i_nlink == 0) |
c24b5dfa DC |
1649 | return 0; |
1650 | ||
1651 | if (xfs_can_free_eofblocks(ip, false)) { | |
1652 | ||
1653 | /* | |
1654 | * If we can't get the iolock just skip truncating the blocks | |
1655 | * past EOF because we could deadlock with the mmap_sem | |
1656 | * otherwise. We'll get another chance to drop them once the | |
1657 | * last reference to the inode is dropped, so we'll never leak | |
1658 | * blocks permanently. | |
1659 | * | |
1660 | * Further, check if the inode is being opened, written and | |
1661 | * closed frequently and we have delayed allocation blocks | |
1662 | * outstanding (e.g. streaming writes from the NFS server), | |
1663 | * truncating the blocks past EOF will cause fragmentation to | |
1664 | * occur. | |
1665 | * | |
1666 | * In this case don't do the truncation, either, but we have to | |
1667 | * be careful how we detect this case. Blocks beyond EOF show | |
1668 | * up as i_delayed_blks even when the inode is clean, so we | |
1669 | * need to truncate them away first before checking for a dirty | |
1670 | * release. Hence on the first dirty close we will still remove | |
1671 | * the speculative allocation, but after that we will leave it | |
1672 | * in place. | |
1673 | */ | |
1674 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
1675 | return 0; | |
1676 | ||
1677 | error = xfs_free_eofblocks(mp, ip, true); | |
2451337d | 1678 | if (error && error != -EAGAIN) |
c24b5dfa DC |
1679 | return error; |
1680 | ||
1681 | /* delalloc blocks after truncation means it really is dirty */ | |
1682 | if (ip->i_delayed_blks) | |
1683 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
1684 | } | |
1685 | return 0; | |
1686 | } | |
1687 | ||
f7be2d7f BF |
1688 | /* |
1689 | * xfs_inactive_truncate | |
1690 | * | |
1691 | * Called to perform a truncate when an inode becomes unlinked. | |
1692 | */ | |
1693 | STATIC int | |
1694 | xfs_inactive_truncate( | |
1695 | struct xfs_inode *ip) | |
1696 | { | |
1697 | struct xfs_mount *mp = ip->i_mount; | |
1698 | struct xfs_trans *tp; | |
1699 | int error; | |
1700 | ||
253f4911 | 1701 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
f7be2d7f BF |
1702 | if (error) { |
1703 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
f7be2d7f BF |
1704 | return error; |
1705 | } | |
1706 | ||
1707 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1708 | xfs_trans_ijoin(tp, ip, 0); | |
1709 | ||
1710 | /* | |
1711 | * Log the inode size first to prevent stale data exposure in the event | |
1712 | * of a system crash before the truncate completes. See the related | |
1713 | * comment in xfs_setattr_size() for details. | |
1714 | */ | |
1715 | ip->i_d.di_size = 0; | |
1716 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1717 | ||
1718 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); | |
1719 | if (error) | |
1720 | goto error_trans_cancel; | |
1721 | ||
1722 | ASSERT(ip->i_d.di_nextents == 0); | |
1723 | ||
70393313 | 1724 | error = xfs_trans_commit(tp); |
f7be2d7f BF |
1725 | if (error) |
1726 | goto error_unlock; | |
1727 | ||
1728 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1729 | return 0; | |
1730 | ||
1731 | error_trans_cancel: | |
4906e215 | 1732 | xfs_trans_cancel(tp); |
f7be2d7f BF |
1733 | error_unlock: |
1734 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1735 | return error; | |
1736 | } | |
1737 | ||
88877d2b BF |
1738 | /* |
1739 | * xfs_inactive_ifree() | |
1740 | * | |
1741 | * Perform the inode free when an inode is unlinked. | |
1742 | */ | |
1743 | STATIC int | |
1744 | xfs_inactive_ifree( | |
1745 | struct xfs_inode *ip) | |
1746 | { | |
2c3234d1 | 1747 | struct xfs_defer_ops dfops; |
88877d2b | 1748 | xfs_fsblock_t first_block; |
88877d2b BF |
1749 | struct xfs_mount *mp = ip->i_mount; |
1750 | struct xfs_trans *tp; | |
1751 | int error; | |
1752 | ||
9d43b180 BF |
1753 | /* |
1754 | * The ifree transaction might need to allocate blocks for record | |
1755 | * insertion to the finobt. We don't want to fail here at ENOSPC, so | |
1756 | * allow ifree to dip into the reserved block pool if necessary. | |
1757 | * | |
1758 | * Freeing large sets of inodes generally means freeing inode chunks, | |
1759 | * directory and file data blocks, so this should be relatively safe. | |
1760 | * Only under severe circumstances should it be possible to free enough | |
1761 | * inodes to exhaust the reserve block pool via finobt expansion while | |
1762 | * at the same time not creating free space in the filesystem. | |
1763 | * | |
1764 | * Send a warning if the reservation does happen to fail, as the inode | |
1765 | * now remains allocated and sits on the unlinked list until the fs is | |
1766 | * repaired. | |
1767 | */ | |
253f4911 CH |
1768 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree, |
1769 | XFS_IFREE_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp); | |
88877d2b | 1770 | if (error) { |
2451337d | 1771 | if (error == -ENOSPC) { |
9d43b180 BF |
1772 | xfs_warn_ratelimited(mp, |
1773 | "Failed to remove inode(s) from unlinked list. " | |
1774 | "Please free space, unmount and run xfs_repair."); | |
1775 | } else { | |
1776 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1777 | } | |
88877d2b BF |
1778 | return error; |
1779 | } | |
1780 | ||
1781 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1782 | xfs_trans_ijoin(tp, ip, 0); | |
1783 | ||
2c3234d1 DW |
1784 | xfs_defer_init(&dfops, &first_block); |
1785 | error = xfs_ifree(tp, ip, &dfops); | |
88877d2b BF |
1786 | if (error) { |
1787 | /* | |
1788 | * If we fail to free the inode, shut down. The cancel | |
1789 | * might do that, we need to make sure. Otherwise the | |
1790 | * inode might be lost for a long time or forever. | |
1791 | */ | |
1792 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1793 | xfs_notice(mp, "%s: xfs_ifree returned error %d", | |
1794 | __func__, error); | |
1795 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); | |
1796 | } | |
4906e215 | 1797 | xfs_trans_cancel(tp); |
88877d2b BF |
1798 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1799 | return error; | |
1800 | } | |
1801 | ||
1802 | /* | |
1803 | * Credit the quota account(s). The inode is gone. | |
1804 | */ | |
1805 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); | |
1806 | ||
1807 | /* | |
d4a97a04 BF |
1808 | * Just ignore errors at this point. There is nothing we can do except |
1809 | * to try to keep going. Make sure it's not a silent error. | |
88877d2b | 1810 | */ |
2c3234d1 | 1811 | error = xfs_defer_finish(&tp, &dfops, NULL); |
d4a97a04 | 1812 | if (error) { |
310a75a3 | 1813 | xfs_notice(mp, "%s: xfs_defer_finish returned error %d", |
88877d2b | 1814 | __func__, error); |
2c3234d1 | 1815 | xfs_defer_cancel(&dfops); |
d4a97a04 | 1816 | } |
70393313 | 1817 | error = xfs_trans_commit(tp); |
88877d2b BF |
1818 | if (error) |
1819 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", | |
1820 | __func__, error); | |
1821 | ||
1822 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1823 | return 0; | |
1824 | } | |
1825 | ||
c24b5dfa DC |
1826 | /* |
1827 | * xfs_inactive | |
1828 | * | |
1829 | * This is called when the vnode reference count for the vnode | |
1830 | * goes to zero. If the file has been unlinked, then it must | |
1831 | * now be truncated. Also, we clear all of the read-ahead state | |
1832 | * kept for the inode here since the file is now closed. | |
1833 | */ | |
74564fb4 | 1834 | void |
c24b5dfa DC |
1835 | xfs_inactive( |
1836 | xfs_inode_t *ip) | |
1837 | { | |
3d3c8b52 | 1838 | struct xfs_mount *mp; |
3d3c8b52 JL |
1839 | int error; |
1840 | int truncate = 0; | |
c24b5dfa DC |
1841 | |
1842 | /* | |
1843 | * If the inode is already free, then there can be nothing | |
1844 | * to clean up here. | |
1845 | */ | |
c19b3b05 | 1846 | if (VFS_I(ip)->i_mode == 0) { |
c24b5dfa DC |
1847 | ASSERT(ip->i_df.if_real_bytes == 0); |
1848 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
74564fb4 | 1849 | return; |
c24b5dfa DC |
1850 | } |
1851 | ||
1852 | mp = ip->i_mount; | |
1853 | ||
c24b5dfa DC |
1854 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
1855 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
74564fb4 | 1856 | return; |
c24b5dfa | 1857 | |
54d7b5c1 | 1858 | if (VFS_I(ip)->i_nlink != 0) { |
c24b5dfa DC |
1859 | /* |
1860 | * force is true because we are evicting an inode from the | |
1861 | * cache. Post-eof blocks must be freed, lest we end up with | |
1862 | * broken free space accounting. | |
1863 | */ | |
74564fb4 BF |
1864 | if (xfs_can_free_eofblocks(ip, true)) |
1865 | xfs_free_eofblocks(mp, ip, false); | |
1866 | ||
1867 | return; | |
c24b5dfa DC |
1868 | } |
1869 | ||
c19b3b05 | 1870 | if (S_ISREG(VFS_I(ip)->i_mode) && |
c24b5dfa DC |
1871 | (ip->i_d.di_size != 0 || XFS_ISIZE(ip) != 0 || |
1872 | ip->i_d.di_nextents > 0 || ip->i_delayed_blks > 0)) | |
1873 | truncate = 1; | |
1874 | ||
1875 | error = xfs_qm_dqattach(ip, 0); | |
1876 | if (error) | |
74564fb4 | 1877 | return; |
c24b5dfa | 1878 | |
c19b3b05 | 1879 | if (S_ISLNK(VFS_I(ip)->i_mode)) |
36b21dde | 1880 | error = xfs_inactive_symlink(ip); |
f7be2d7f BF |
1881 | else if (truncate) |
1882 | error = xfs_inactive_truncate(ip); | |
1883 | if (error) | |
74564fb4 | 1884 | return; |
c24b5dfa DC |
1885 | |
1886 | /* | |
1887 | * If there are attributes associated with the file then blow them away | |
1888 | * now. The code calls a routine that recursively deconstructs the | |
6dfe5a04 | 1889 | * attribute fork. If also blows away the in-core attribute fork. |
c24b5dfa | 1890 | */ |
6dfe5a04 | 1891 | if (XFS_IFORK_Q(ip)) { |
c24b5dfa DC |
1892 | error = xfs_attr_inactive(ip); |
1893 | if (error) | |
74564fb4 | 1894 | return; |
c24b5dfa DC |
1895 | } |
1896 | ||
6dfe5a04 | 1897 | ASSERT(!ip->i_afp); |
c24b5dfa | 1898 | ASSERT(ip->i_d.di_anextents == 0); |
6dfe5a04 | 1899 | ASSERT(ip->i_d.di_forkoff == 0); |
c24b5dfa DC |
1900 | |
1901 | /* | |
1902 | * Free the inode. | |
1903 | */ | |
88877d2b BF |
1904 | error = xfs_inactive_ifree(ip); |
1905 | if (error) | |
74564fb4 | 1906 | return; |
c24b5dfa DC |
1907 | |
1908 | /* | |
1909 | * Release the dquots held by inode, if any. | |
1910 | */ | |
1911 | xfs_qm_dqdetach(ip); | |
c24b5dfa DC |
1912 | } |
1913 | ||
1da177e4 | 1914 | /* |
54d7b5c1 DC |
1915 | * This is called when the inode's link count goes to 0 or we are creating a |
1916 | * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be | |
1917 | * set to true as the link count is dropped to zero by the VFS after we've | |
1918 | * created the file successfully, so we have to add it to the unlinked list | |
1919 | * while the link count is non-zero. | |
1920 | * | |
1921 | * We place the on-disk inode on a list in the AGI. It will be pulled from this | |
1922 | * list when the inode is freed. | |
1da177e4 | 1923 | */ |
54d7b5c1 | 1924 | STATIC int |
1da177e4 | 1925 | xfs_iunlink( |
54d7b5c1 DC |
1926 | struct xfs_trans *tp, |
1927 | struct xfs_inode *ip) | |
1da177e4 | 1928 | { |
54d7b5c1 | 1929 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1930 | xfs_agi_t *agi; |
1931 | xfs_dinode_t *dip; | |
1932 | xfs_buf_t *agibp; | |
1933 | xfs_buf_t *ibp; | |
1da177e4 LT |
1934 | xfs_agino_t agino; |
1935 | short bucket_index; | |
1936 | int offset; | |
1937 | int error; | |
1da177e4 | 1938 | |
c19b3b05 | 1939 | ASSERT(VFS_I(ip)->i_mode != 0); |
1da177e4 | 1940 | |
1da177e4 LT |
1941 | /* |
1942 | * Get the agi buffer first. It ensures lock ordering | |
1943 | * on the list. | |
1944 | */ | |
5e1be0fb | 1945 | error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp); |
859d7182 | 1946 | if (error) |
1da177e4 | 1947 | return error; |
1da177e4 | 1948 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 1949 | |
1da177e4 LT |
1950 | /* |
1951 | * Get the index into the agi hash table for the | |
1952 | * list this inode will go on. | |
1953 | */ | |
1954 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
1955 | ASSERT(agino != 0); | |
1956 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
1957 | ASSERT(agi->agi_unlinked[bucket_index]); | |
16259e7d | 1958 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino); |
1da177e4 | 1959 | |
69ef921b | 1960 | if (agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)) { |
1da177e4 LT |
1961 | /* |
1962 | * There is already another inode in the bucket we need | |
1963 | * to add ourselves to. Add us at the front of the list. | |
1964 | * Here we put the head pointer into our next pointer, | |
1965 | * and then we fall through to point the head at us. | |
1966 | */ | |
475ee413 CH |
1967 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
1968 | 0, 0); | |
c319b58b VA |
1969 | if (error) |
1970 | return error; | |
1971 | ||
69ef921b | 1972 | ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO)); |
1da177e4 | 1973 | dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; |
92bfc6e7 | 1974 | offset = ip->i_imap.im_boffset + |
1da177e4 | 1975 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
1976 | |
1977 | /* need to recalc the inode CRC if appropriate */ | |
1978 | xfs_dinode_calc_crc(mp, dip); | |
1979 | ||
1da177e4 LT |
1980 | xfs_trans_inode_buf(tp, ibp); |
1981 | xfs_trans_log_buf(tp, ibp, offset, | |
1982 | (offset + sizeof(xfs_agino_t) - 1)); | |
1983 | xfs_inobp_check(mp, ibp); | |
1984 | } | |
1985 | ||
1986 | /* | |
1987 | * Point the bucket head pointer at the inode being inserted. | |
1988 | */ | |
1989 | ASSERT(agino != 0); | |
16259e7d | 1990 | agi->agi_unlinked[bucket_index] = cpu_to_be32(agino); |
1da177e4 LT |
1991 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
1992 | (sizeof(xfs_agino_t) * bucket_index); | |
f19b872b | 1993 | xfs_trans_buf_set_type(tp, agibp, XFS_BLFT_AGI_BUF); |
1da177e4 LT |
1994 | xfs_trans_log_buf(tp, agibp, offset, |
1995 | (offset + sizeof(xfs_agino_t) - 1)); | |
1996 | return 0; | |
1997 | } | |
1998 | ||
1999 | /* | |
2000 | * Pull the on-disk inode from the AGI unlinked list. | |
2001 | */ | |
2002 | STATIC int | |
2003 | xfs_iunlink_remove( | |
2004 | xfs_trans_t *tp, | |
2005 | xfs_inode_t *ip) | |
2006 | { | |
2007 | xfs_ino_t next_ino; | |
2008 | xfs_mount_t *mp; | |
2009 | xfs_agi_t *agi; | |
2010 | xfs_dinode_t *dip; | |
2011 | xfs_buf_t *agibp; | |
2012 | xfs_buf_t *ibp; | |
2013 | xfs_agnumber_t agno; | |
1da177e4 LT |
2014 | xfs_agino_t agino; |
2015 | xfs_agino_t next_agino; | |
2016 | xfs_buf_t *last_ibp; | |
6fdf8ccc | 2017 | xfs_dinode_t *last_dip = NULL; |
1da177e4 | 2018 | short bucket_index; |
6fdf8ccc | 2019 | int offset, last_offset = 0; |
1da177e4 | 2020 | int error; |
1da177e4 | 2021 | |
1da177e4 | 2022 | mp = tp->t_mountp; |
1da177e4 | 2023 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
1da177e4 LT |
2024 | |
2025 | /* | |
2026 | * Get the agi buffer first. It ensures lock ordering | |
2027 | * on the list. | |
2028 | */ | |
5e1be0fb CH |
2029 | error = xfs_read_agi(mp, tp, agno, &agibp); |
2030 | if (error) | |
1da177e4 | 2031 | return error; |
5e1be0fb | 2032 | |
1da177e4 | 2033 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 2034 | |
1da177e4 LT |
2035 | /* |
2036 | * Get the index into the agi hash table for the | |
2037 | * list this inode will go on. | |
2038 | */ | |
2039 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
2040 | ASSERT(agino != 0); | |
2041 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
69ef921b | 2042 | ASSERT(agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)); |
1da177e4 LT |
2043 | ASSERT(agi->agi_unlinked[bucket_index]); |
2044 | ||
16259e7d | 2045 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) { |
1da177e4 | 2046 | /* |
475ee413 CH |
2047 | * We're at the head of the list. Get the inode's on-disk |
2048 | * buffer to see if there is anyone after us on the list. | |
2049 | * Only modify our next pointer if it is not already NULLAGINO. | |
2050 | * This saves us the overhead of dealing with the buffer when | |
2051 | * there is no need to change it. | |
1da177e4 | 2052 | */ |
475ee413 CH |
2053 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2054 | 0, 0); | |
1da177e4 | 2055 | if (error) { |
475ee413 | 2056 | xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 2057 | __func__, error); |
1da177e4 LT |
2058 | return error; |
2059 | } | |
347d1c01 | 2060 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
2061 | ASSERT(next_agino != 0); |
2062 | if (next_agino != NULLAGINO) { | |
347d1c01 | 2063 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 2064 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2065 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2066 | |
2067 | /* need to recalc the inode CRC if appropriate */ | |
2068 | xfs_dinode_calc_crc(mp, dip); | |
2069 | ||
1da177e4 LT |
2070 | xfs_trans_inode_buf(tp, ibp); |
2071 | xfs_trans_log_buf(tp, ibp, offset, | |
2072 | (offset + sizeof(xfs_agino_t) - 1)); | |
2073 | xfs_inobp_check(mp, ibp); | |
2074 | } else { | |
2075 | xfs_trans_brelse(tp, ibp); | |
2076 | } | |
2077 | /* | |
2078 | * Point the bucket head pointer at the next inode. | |
2079 | */ | |
2080 | ASSERT(next_agino != 0); | |
2081 | ASSERT(next_agino != agino); | |
16259e7d | 2082 | agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino); |
1da177e4 LT |
2083 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
2084 | (sizeof(xfs_agino_t) * bucket_index); | |
f19b872b | 2085 | xfs_trans_buf_set_type(tp, agibp, XFS_BLFT_AGI_BUF); |
1da177e4 LT |
2086 | xfs_trans_log_buf(tp, agibp, offset, |
2087 | (offset + sizeof(xfs_agino_t) - 1)); | |
2088 | } else { | |
2089 | /* | |
2090 | * We need to search the list for the inode being freed. | |
2091 | */ | |
16259e7d | 2092 | next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]); |
1da177e4 LT |
2093 | last_ibp = NULL; |
2094 | while (next_agino != agino) { | |
129dbc9a CH |
2095 | struct xfs_imap imap; |
2096 | ||
2097 | if (last_ibp) | |
1da177e4 | 2098 | xfs_trans_brelse(tp, last_ibp); |
129dbc9a CH |
2099 | |
2100 | imap.im_blkno = 0; | |
1da177e4 | 2101 | next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino); |
129dbc9a CH |
2102 | |
2103 | error = xfs_imap(mp, tp, next_ino, &imap, 0); | |
2104 | if (error) { | |
2105 | xfs_warn(mp, | |
2106 | "%s: xfs_imap returned error %d.", | |
2107 | __func__, error); | |
2108 | return error; | |
2109 | } | |
2110 | ||
2111 | error = xfs_imap_to_bp(mp, tp, &imap, &last_dip, | |
2112 | &last_ibp, 0, 0); | |
1da177e4 | 2113 | if (error) { |
0b932ccc | 2114 | xfs_warn(mp, |
129dbc9a | 2115 | "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 2116 | __func__, error); |
1da177e4 LT |
2117 | return error; |
2118 | } | |
129dbc9a CH |
2119 | |
2120 | last_offset = imap.im_boffset; | |
347d1c01 | 2121 | next_agino = be32_to_cpu(last_dip->di_next_unlinked); |
1da177e4 LT |
2122 | ASSERT(next_agino != NULLAGINO); |
2123 | ASSERT(next_agino != 0); | |
2124 | } | |
475ee413 | 2125 | |
1da177e4 | 2126 | /* |
475ee413 CH |
2127 | * Now last_ibp points to the buffer previous to us on the |
2128 | * unlinked list. Pull us from the list. | |
1da177e4 | 2129 | */ |
475ee413 CH |
2130 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2131 | 0, 0); | |
1da177e4 | 2132 | if (error) { |
475ee413 | 2133 | xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.", |
0b932ccc | 2134 | __func__, error); |
1da177e4 LT |
2135 | return error; |
2136 | } | |
347d1c01 | 2137 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
2138 | ASSERT(next_agino != 0); |
2139 | ASSERT(next_agino != agino); | |
2140 | if (next_agino != NULLAGINO) { | |
347d1c01 | 2141 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 2142 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2143 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2144 | |
2145 | /* need to recalc the inode CRC if appropriate */ | |
2146 | xfs_dinode_calc_crc(mp, dip); | |
2147 | ||
1da177e4 LT |
2148 | xfs_trans_inode_buf(tp, ibp); |
2149 | xfs_trans_log_buf(tp, ibp, offset, | |
2150 | (offset + sizeof(xfs_agino_t) - 1)); | |
2151 | xfs_inobp_check(mp, ibp); | |
2152 | } else { | |
2153 | xfs_trans_brelse(tp, ibp); | |
2154 | } | |
2155 | /* | |
2156 | * Point the previous inode on the list to the next inode. | |
2157 | */ | |
347d1c01 | 2158 | last_dip->di_next_unlinked = cpu_to_be32(next_agino); |
1da177e4 LT |
2159 | ASSERT(next_agino != 0); |
2160 | offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked); | |
0a32c26e DC |
2161 | |
2162 | /* need to recalc the inode CRC if appropriate */ | |
2163 | xfs_dinode_calc_crc(mp, last_dip); | |
2164 | ||
1da177e4 LT |
2165 | xfs_trans_inode_buf(tp, last_ibp); |
2166 | xfs_trans_log_buf(tp, last_ibp, offset, | |
2167 | (offset + sizeof(xfs_agino_t) - 1)); | |
2168 | xfs_inobp_check(mp, last_ibp); | |
2169 | } | |
2170 | return 0; | |
2171 | } | |
2172 | ||
5b3eed75 | 2173 | /* |
0b8182db | 2174 | * A big issue when freeing the inode cluster is that we _cannot_ skip any |
5b3eed75 DC |
2175 | * inodes that are in memory - they all must be marked stale and attached to |
2176 | * the cluster buffer. | |
2177 | */ | |
2a30f36d | 2178 | STATIC int |
1da177e4 | 2179 | xfs_ifree_cluster( |
09b56604 BF |
2180 | xfs_inode_t *free_ip, |
2181 | xfs_trans_t *tp, | |
2182 | struct xfs_icluster *xic) | |
1da177e4 LT |
2183 | { |
2184 | xfs_mount_t *mp = free_ip->i_mount; | |
2185 | int blks_per_cluster; | |
982e939e | 2186 | int inodes_per_cluster; |
1da177e4 | 2187 | int nbufs; |
5b257b4a | 2188 | int i, j; |
3cdaa189 | 2189 | int ioffset; |
1da177e4 LT |
2190 | xfs_daddr_t blkno; |
2191 | xfs_buf_t *bp; | |
5b257b4a | 2192 | xfs_inode_t *ip; |
1da177e4 LT |
2193 | xfs_inode_log_item_t *iip; |
2194 | xfs_log_item_t *lip; | |
5017e97d | 2195 | struct xfs_perag *pag; |
09b56604 | 2196 | xfs_ino_t inum; |
1da177e4 | 2197 | |
09b56604 | 2198 | inum = xic->first_ino; |
5017e97d | 2199 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum)); |
982e939e JL |
2200 | blks_per_cluster = xfs_icluster_size_fsb(mp); |
2201 | inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog; | |
2202 | nbufs = mp->m_ialloc_blks / blks_per_cluster; | |
1da177e4 | 2203 | |
982e939e | 2204 | for (j = 0; j < nbufs; j++, inum += inodes_per_cluster) { |
09b56604 BF |
2205 | /* |
2206 | * The allocation bitmap tells us which inodes of the chunk were | |
2207 | * physically allocated. Skip the cluster if an inode falls into | |
2208 | * a sparse region. | |
2209 | */ | |
3cdaa189 BF |
2210 | ioffset = inum - xic->first_ino; |
2211 | if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) { | |
2212 | ASSERT(do_mod(ioffset, inodes_per_cluster) == 0); | |
09b56604 BF |
2213 | continue; |
2214 | } | |
2215 | ||
1da177e4 LT |
2216 | blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum), |
2217 | XFS_INO_TO_AGBNO(mp, inum)); | |
2218 | ||
5b257b4a DC |
2219 | /* |
2220 | * We obtain and lock the backing buffer first in the process | |
2221 | * here, as we have to ensure that any dirty inode that we | |
2222 | * can't get the flush lock on is attached to the buffer. | |
2223 | * If we scan the in-memory inodes first, then buffer IO can | |
2224 | * complete before we get a lock on it, and hence we may fail | |
2225 | * to mark all the active inodes on the buffer stale. | |
2226 | */ | |
2227 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, | |
b6aff29f DC |
2228 | mp->m_bsize * blks_per_cluster, |
2229 | XBF_UNMAPPED); | |
5b257b4a | 2230 | |
2a30f36d | 2231 | if (!bp) |
2451337d | 2232 | return -ENOMEM; |
b0f539de DC |
2233 | |
2234 | /* | |
2235 | * This buffer may not have been correctly initialised as we | |
2236 | * didn't read it from disk. That's not important because we are | |
2237 | * only using to mark the buffer as stale in the log, and to | |
2238 | * attach stale cached inodes on it. That means it will never be | |
2239 | * dispatched for IO. If it is, we want to know about it, and we | |
2240 | * want it to fail. We can acheive this by adding a write | |
2241 | * verifier to the buffer. | |
2242 | */ | |
1813dd64 | 2243 | bp->b_ops = &xfs_inode_buf_ops; |
b0f539de | 2244 | |
5b257b4a DC |
2245 | /* |
2246 | * Walk the inodes already attached to the buffer and mark them | |
2247 | * stale. These will all have the flush locks held, so an | |
5b3eed75 DC |
2248 | * in-memory inode walk can't lock them. By marking them all |
2249 | * stale first, we will not attempt to lock them in the loop | |
2250 | * below as the XFS_ISTALE flag will be set. | |
5b257b4a | 2251 | */ |
adadbeef | 2252 | lip = bp->b_fspriv; |
5b257b4a DC |
2253 | while (lip) { |
2254 | if (lip->li_type == XFS_LI_INODE) { | |
2255 | iip = (xfs_inode_log_item_t *)lip; | |
2256 | ASSERT(iip->ili_logged == 1); | |
ca30b2a7 | 2257 | lip->li_cb = xfs_istale_done; |
5b257b4a DC |
2258 | xfs_trans_ail_copy_lsn(mp->m_ail, |
2259 | &iip->ili_flush_lsn, | |
2260 | &iip->ili_item.li_lsn); | |
2261 | xfs_iflags_set(iip->ili_inode, XFS_ISTALE); | |
5b257b4a DC |
2262 | } |
2263 | lip = lip->li_bio_list; | |
2264 | } | |
1da177e4 | 2265 | |
5b3eed75 | 2266 | |
1da177e4 | 2267 | /* |
5b257b4a DC |
2268 | * For each inode in memory attempt to add it to the inode |
2269 | * buffer and set it up for being staled on buffer IO | |
2270 | * completion. This is safe as we've locked out tail pushing | |
2271 | * and flushing by locking the buffer. | |
1da177e4 | 2272 | * |
5b257b4a DC |
2273 | * We have already marked every inode that was part of a |
2274 | * transaction stale above, which means there is no point in | |
2275 | * even trying to lock them. | |
1da177e4 | 2276 | */ |
982e939e | 2277 | for (i = 0; i < inodes_per_cluster; i++) { |
5b3eed75 | 2278 | retry: |
1a3e8f3d | 2279 | rcu_read_lock(); |
da353b0d DC |
2280 | ip = radix_tree_lookup(&pag->pag_ici_root, |
2281 | XFS_INO_TO_AGINO(mp, (inum + i))); | |
1da177e4 | 2282 | |
1a3e8f3d DC |
2283 | /* Inode not in memory, nothing to do */ |
2284 | if (!ip) { | |
2285 | rcu_read_unlock(); | |
1da177e4 LT |
2286 | continue; |
2287 | } | |
2288 | ||
1a3e8f3d DC |
2289 | /* |
2290 | * because this is an RCU protected lookup, we could | |
2291 | * find a recently freed or even reallocated inode | |
2292 | * during the lookup. We need to check under the | |
2293 | * i_flags_lock for a valid inode here. Skip it if it | |
2294 | * is not valid, the wrong inode or stale. | |
2295 | */ | |
2296 | spin_lock(&ip->i_flags_lock); | |
2297 | if (ip->i_ino != inum + i || | |
2298 | __xfs_iflags_test(ip, XFS_ISTALE)) { | |
2299 | spin_unlock(&ip->i_flags_lock); | |
2300 | rcu_read_unlock(); | |
2301 | continue; | |
2302 | } | |
2303 | spin_unlock(&ip->i_flags_lock); | |
2304 | ||
5b3eed75 DC |
2305 | /* |
2306 | * Don't try to lock/unlock the current inode, but we | |
2307 | * _cannot_ skip the other inodes that we did not find | |
2308 | * in the list attached to the buffer and are not | |
2309 | * already marked stale. If we can't lock it, back off | |
2310 | * and retry. | |
2311 | */ | |
5b257b4a DC |
2312 | if (ip != free_ip && |
2313 | !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { | |
1a3e8f3d | 2314 | rcu_read_unlock(); |
5b3eed75 DC |
2315 | delay(1); |
2316 | goto retry; | |
1da177e4 | 2317 | } |
1a3e8f3d | 2318 | rcu_read_unlock(); |
1da177e4 | 2319 | |
5b3eed75 | 2320 | xfs_iflock(ip); |
5b257b4a | 2321 | xfs_iflags_set(ip, XFS_ISTALE); |
1da177e4 | 2322 | |
5b3eed75 DC |
2323 | /* |
2324 | * we don't need to attach clean inodes or those only | |
2325 | * with unlogged changes (which we throw away, anyway). | |
2326 | */ | |
1da177e4 | 2327 | iip = ip->i_itemp; |
5b3eed75 | 2328 | if (!iip || xfs_inode_clean(ip)) { |
5b257b4a | 2329 | ASSERT(ip != free_ip); |
1da177e4 LT |
2330 | xfs_ifunlock(ip); |
2331 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2332 | continue; | |
2333 | } | |
2334 | ||
f5d8d5c4 CH |
2335 | iip->ili_last_fields = iip->ili_fields; |
2336 | iip->ili_fields = 0; | |
fc0561ce | 2337 | iip->ili_fsync_fields = 0; |
1da177e4 | 2338 | iip->ili_logged = 1; |
7b2e2a31 DC |
2339 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
2340 | &iip->ili_item.li_lsn); | |
1da177e4 | 2341 | |
ca30b2a7 CH |
2342 | xfs_buf_attach_iodone(bp, xfs_istale_done, |
2343 | &iip->ili_item); | |
5b257b4a DC |
2344 | |
2345 | if (ip != free_ip) | |
1da177e4 | 2346 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
2347 | } |
2348 | ||
5b3eed75 | 2349 | xfs_trans_stale_inode_buf(tp, bp); |
1da177e4 LT |
2350 | xfs_trans_binval(tp, bp); |
2351 | } | |
2352 | ||
5017e97d | 2353 | xfs_perag_put(pag); |
2a30f36d | 2354 | return 0; |
1da177e4 LT |
2355 | } |
2356 | ||
2357 | /* | |
2358 | * This is called to return an inode to the inode free list. | |
2359 | * The inode should already be truncated to 0 length and have | |
2360 | * no pages associated with it. This routine also assumes that | |
2361 | * the inode is already a part of the transaction. | |
2362 | * | |
2363 | * The on-disk copy of the inode will have been added to the list | |
2364 | * of unlinked inodes in the AGI. We need to remove the inode from | |
2365 | * that list atomically with respect to freeing it here. | |
2366 | */ | |
2367 | int | |
2368 | xfs_ifree( | |
2369 | xfs_trans_t *tp, | |
2370 | xfs_inode_t *ip, | |
2c3234d1 | 2371 | struct xfs_defer_ops *dfops) |
1da177e4 LT |
2372 | { |
2373 | int error; | |
09b56604 | 2374 | struct xfs_icluster xic = { 0 }; |
1da177e4 | 2375 | |
579aa9ca | 2376 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
54d7b5c1 | 2377 | ASSERT(VFS_I(ip)->i_nlink == 0); |
1da177e4 LT |
2378 | ASSERT(ip->i_d.di_nextents == 0); |
2379 | ASSERT(ip->i_d.di_anextents == 0); | |
c19b3b05 | 2380 | ASSERT(ip->i_d.di_size == 0 || !S_ISREG(VFS_I(ip)->i_mode)); |
1da177e4 LT |
2381 | ASSERT(ip->i_d.di_nblocks == 0); |
2382 | ||
2383 | /* | |
2384 | * Pull the on-disk inode from the AGI unlinked list. | |
2385 | */ | |
2386 | error = xfs_iunlink_remove(tp, ip); | |
1baaed8f | 2387 | if (error) |
1da177e4 | 2388 | return error; |
1da177e4 | 2389 | |
2c3234d1 | 2390 | error = xfs_difree(tp, ip->i_ino, dfops, &xic); |
1baaed8f | 2391 | if (error) |
1da177e4 | 2392 | return error; |
1baaed8f | 2393 | |
c19b3b05 | 2394 | VFS_I(ip)->i_mode = 0; /* mark incore inode as free */ |
1da177e4 LT |
2395 | ip->i_d.di_flags = 0; |
2396 | ip->i_d.di_dmevmask = 0; | |
2397 | ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */ | |
1da177e4 LT |
2398 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
2399 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
2400 | /* | |
2401 | * Bump the generation count so no one will be confused | |
2402 | * by reincarnations of this inode. | |
2403 | */ | |
9e9a2674 | 2404 | VFS_I(ip)->i_generation++; |
1da177e4 LT |
2405 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
2406 | ||
09b56604 BF |
2407 | if (xic.deleted) |
2408 | error = xfs_ifree_cluster(ip, tp, &xic); | |
1da177e4 | 2409 | |
2a30f36d | 2410 | return error; |
1da177e4 LT |
2411 | } |
2412 | ||
1da177e4 | 2413 | /* |
60ec6783 CH |
2414 | * This is called to unpin an inode. The caller must have the inode locked |
2415 | * in at least shared mode so that the buffer cannot be subsequently pinned | |
2416 | * once someone is waiting for it to be unpinned. | |
1da177e4 | 2417 | */ |
60ec6783 | 2418 | static void |
f392e631 | 2419 | xfs_iunpin( |
60ec6783 | 2420 | struct xfs_inode *ip) |
1da177e4 | 2421 | { |
579aa9ca | 2422 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 | 2423 | |
4aaf15d1 DC |
2424 | trace_xfs_inode_unpin_nowait(ip, _RET_IP_); |
2425 | ||
a3f74ffb | 2426 | /* Give the log a push to start the unpinning I/O */ |
60ec6783 | 2427 | xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0); |
a14a348b | 2428 | |
a3f74ffb | 2429 | } |
1da177e4 | 2430 | |
f392e631 CH |
2431 | static void |
2432 | __xfs_iunpin_wait( | |
2433 | struct xfs_inode *ip) | |
2434 | { | |
2435 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IPINNED_BIT); | |
2436 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IPINNED_BIT); | |
2437 | ||
2438 | xfs_iunpin(ip); | |
2439 | ||
2440 | do { | |
2441 | prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
2442 | if (xfs_ipincount(ip)) | |
2443 | io_schedule(); | |
2444 | } while (xfs_ipincount(ip)); | |
2445 | finish_wait(wq, &wait.wait); | |
2446 | } | |
2447 | ||
777df5af | 2448 | void |
a3f74ffb | 2449 | xfs_iunpin_wait( |
60ec6783 | 2450 | struct xfs_inode *ip) |
a3f74ffb | 2451 | { |
f392e631 CH |
2452 | if (xfs_ipincount(ip)) |
2453 | __xfs_iunpin_wait(ip); | |
1da177e4 LT |
2454 | } |
2455 | ||
27320369 DC |
2456 | /* |
2457 | * Removing an inode from the namespace involves removing the directory entry | |
2458 | * and dropping the link count on the inode. Removing the directory entry can | |
2459 | * result in locking an AGF (directory blocks were freed) and removing a link | |
2460 | * count can result in placing the inode on an unlinked list which results in | |
2461 | * locking an AGI. | |
2462 | * | |
2463 | * The big problem here is that we have an ordering constraint on AGF and AGI | |
2464 | * locking - inode allocation locks the AGI, then can allocate a new extent for | |
2465 | * new inodes, locking the AGF after the AGI. Similarly, freeing the inode | |
2466 | * removes the inode from the unlinked list, requiring that we lock the AGI | |
2467 | * first, and then freeing the inode can result in an inode chunk being freed | |
2468 | * and hence freeing disk space requiring that we lock an AGF. | |
2469 | * | |
2470 | * Hence the ordering that is imposed by other parts of the code is AGI before | |
2471 | * AGF. This means we cannot remove the directory entry before we drop the inode | |
2472 | * reference count and put it on the unlinked list as this results in a lock | |
2473 | * order of AGF then AGI, and this can deadlock against inode allocation and | |
2474 | * freeing. Therefore we must drop the link counts before we remove the | |
2475 | * directory entry. | |
2476 | * | |
2477 | * This is still safe from a transactional point of view - it is not until we | |
310a75a3 | 2478 | * get to xfs_defer_finish() that we have the possibility of multiple |
27320369 DC |
2479 | * transactions in this operation. Hence as long as we remove the directory |
2480 | * entry and drop the link count in the first transaction of the remove | |
2481 | * operation, there are no transactional constraints on the ordering here. | |
2482 | */ | |
c24b5dfa DC |
2483 | int |
2484 | xfs_remove( | |
2485 | xfs_inode_t *dp, | |
2486 | struct xfs_name *name, | |
2487 | xfs_inode_t *ip) | |
2488 | { | |
2489 | xfs_mount_t *mp = dp->i_mount; | |
2490 | xfs_trans_t *tp = NULL; | |
c19b3b05 | 2491 | int is_dir = S_ISDIR(VFS_I(ip)->i_mode); |
c24b5dfa | 2492 | int error = 0; |
2c3234d1 | 2493 | struct xfs_defer_ops dfops; |
c24b5dfa | 2494 | xfs_fsblock_t first_block; |
c24b5dfa | 2495 | uint resblks; |
c24b5dfa DC |
2496 | |
2497 | trace_xfs_remove(dp, name); | |
2498 | ||
2499 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 2500 | return -EIO; |
c24b5dfa DC |
2501 | |
2502 | error = xfs_qm_dqattach(dp, 0); | |
2503 | if (error) | |
2504 | goto std_return; | |
2505 | ||
2506 | error = xfs_qm_dqattach(ip, 0); | |
2507 | if (error) | |
2508 | goto std_return; | |
2509 | ||
c24b5dfa DC |
2510 | /* |
2511 | * We try to get the real space reservation first, | |
2512 | * allowing for directory btree deletion(s) implying | |
2513 | * possible bmap insert(s). If we can't get the space | |
2514 | * reservation then we use 0 instead, and avoid the bmap | |
2515 | * btree insert(s) in the directory code by, if the bmap | |
2516 | * insert tries to happen, instead trimming the LAST | |
2517 | * block from the directory. | |
2518 | */ | |
2519 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
253f4911 | 2520 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_remove, resblks, 0, 0, &tp); |
2451337d | 2521 | if (error == -ENOSPC) { |
c24b5dfa | 2522 | resblks = 0; |
253f4911 CH |
2523 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_remove, 0, 0, 0, |
2524 | &tp); | |
c24b5dfa DC |
2525 | } |
2526 | if (error) { | |
2451337d | 2527 | ASSERT(error != -ENOSPC); |
253f4911 | 2528 | goto std_return; |
c24b5dfa DC |
2529 | } |
2530 | ||
dbad7c99 | 2531 | xfs_ilock(dp, XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); |
c24b5dfa DC |
2532 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
2533 | ||
dbad7c99 | 2534 | xfs_trans_ijoin(tp, dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
c24b5dfa DC |
2535 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
2536 | ||
2537 | /* | |
2538 | * If we're removing a directory perform some additional validation. | |
2539 | */ | |
2540 | if (is_dir) { | |
54d7b5c1 DC |
2541 | ASSERT(VFS_I(ip)->i_nlink >= 2); |
2542 | if (VFS_I(ip)->i_nlink != 2) { | |
2451337d | 2543 | error = -ENOTEMPTY; |
c24b5dfa DC |
2544 | goto out_trans_cancel; |
2545 | } | |
2546 | if (!xfs_dir_isempty(ip)) { | |
2451337d | 2547 | error = -ENOTEMPTY; |
c24b5dfa DC |
2548 | goto out_trans_cancel; |
2549 | } | |
c24b5dfa | 2550 | |
27320369 | 2551 | /* Drop the link from ip's "..". */ |
c24b5dfa DC |
2552 | error = xfs_droplink(tp, dp); |
2553 | if (error) | |
27320369 | 2554 | goto out_trans_cancel; |
c24b5dfa | 2555 | |
27320369 | 2556 | /* Drop the "." link from ip to self. */ |
c24b5dfa DC |
2557 | error = xfs_droplink(tp, ip); |
2558 | if (error) | |
27320369 | 2559 | goto out_trans_cancel; |
c24b5dfa DC |
2560 | } else { |
2561 | /* | |
2562 | * When removing a non-directory we need to log the parent | |
2563 | * inode here. For a directory this is done implicitly | |
2564 | * by the xfs_droplink call for the ".." entry. | |
2565 | */ | |
2566 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2567 | } | |
27320369 | 2568 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
c24b5dfa | 2569 | |
27320369 | 2570 | /* Drop the link from dp to ip. */ |
c24b5dfa DC |
2571 | error = xfs_droplink(tp, ip); |
2572 | if (error) | |
27320369 | 2573 | goto out_trans_cancel; |
c24b5dfa | 2574 | |
2c3234d1 | 2575 | xfs_defer_init(&dfops, &first_block); |
27320369 | 2576 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
2c3234d1 | 2577 | &first_block, &dfops, resblks); |
27320369 | 2578 | if (error) { |
2451337d | 2579 | ASSERT(error != -ENOENT); |
27320369 DC |
2580 | goto out_bmap_cancel; |
2581 | } | |
2582 | ||
c24b5dfa DC |
2583 | /* |
2584 | * If this is a synchronous mount, make sure that the | |
2585 | * remove transaction goes to disk before returning to | |
2586 | * the user. | |
2587 | */ | |
2588 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
2589 | xfs_trans_set_sync(tp); | |
2590 | ||
2c3234d1 | 2591 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa DC |
2592 | if (error) |
2593 | goto out_bmap_cancel; | |
2594 | ||
70393313 | 2595 | error = xfs_trans_commit(tp); |
c24b5dfa DC |
2596 | if (error) |
2597 | goto std_return; | |
2598 | ||
2cd2ef6a | 2599 | if (is_dir && xfs_inode_is_filestream(ip)) |
c24b5dfa DC |
2600 | xfs_filestream_deassociate(ip); |
2601 | ||
2602 | return 0; | |
2603 | ||
2604 | out_bmap_cancel: | |
2c3234d1 | 2605 | xfs_defer_cancel(&dfops); |
c24b5dfa | 2606 | out_trans_cancel: |
4906e215 | 2607 | xfs_trans_cancel(tp); |
c24b5dfa DC |
2608 | std_return: |
2609 | return error; | |
2610 | } | |
2611 | ||
f6bba201 DC |
2612 | /* |
2613 | * Enter all inodes for a rename transaction into a sorted array. | |
2614 | */ | |
95afcf5c | 2615 | #define __XFS_SORT_INODES 5 |
f6bba201 DC |
2616 | STATIC void |
2617 | xfs_sort_for_rename( | |
95afcf5c DC |
2618 | struct xfs_inode *dp1, /* in: old (source) directory inode */ |
2619 | struct xfs_inode *dp2, /* in: new (target) directory inode */ | |
2620 | struct xfs_inode *ip1, /* in: inode of old entry */ | |
2621 | struct xfs_inode *ip2, /* in: inode of new entry */ | |
2622 | struct xfs_inode *wip, /* in: whiteout inode */ | |
2623 | struct xfs_inode **i_tab,/* out: sorted array of inodes */ | |
2624 | int *num_inodes) /* in/out: inodes in array */ | |
f6bba201 | 2625 | { |
f6bba201 DC |
2626 | int i, j; |
2627 | ||
95afcf5c DC |
2628 | ASSERT(*num_inodes == __XFS_SORT_INODES); |
2629 | memset(i_tab, 0, *num_inodes * sizeof(struct xfs_inode *)); | |
2630 | ||
f6bba201 DC |
2631 | /* |
2632 | * i_tab contains a list of pointers to inodes. We initialize | |
2633 | * the table here & we'll sort it. We will then use it to | |
2634 | * order the acquisition of the inode locks. | |
2635 | * | |
2636 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
2637 | */ | |
95afcf5c DC |
2638 | i = 0; |
2639 | i_tab[i++] = dp1; | |
2640 | i_tab[i++] = dp2; | |
2641 | i_tab[i++] = ip1; | |
2642 | if (ip2) | |
2643 | i_tab[i++] = ip2; | |
2644 | if (wip) | |
2645 | i_tab[i++] = wip; | |
2646 | *num_inodes = i; | |
f6bba201 DC |
2647 | |
2648 | /* | |
2649 | * Sort the elements via bubble sort. (Remember, there are at | |
95afcf5c | 2650 | * most 5 elements to sort, so this is adequate.) |
f6bba201 DC |
2651 | */ |
2652 | for (i = 0; i < *num_inodes; i++) { | |
2653 | for (j = 1; j < *num_inodes; j++) { | |
2654 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { | |
95afcf5c | 2655 | struct xfs_inode *temp = i_tab[j]; |
f6bba201 DC |
2656 | i_tab[j] = i_tab[j-1]; |
2657 | i_tab[j-1] = temp; | |
2658 | } | |
2659 | } | |
2660 | } | |
2661 | } | |
2662 | ||
310606b0 DC |
2663 | static int |
2664 | xfs_finish_rename( | |
2665 | struct xfs_trans *tp, | |
2c3234d1 | 2666 | struct xfs_defer_ops *dfops) |
310606b0 | 2667 | { |
310606b0 DC |
2668 | int error; |
2669 | ||
2670 | /* | |
2671 | * If this is a synchronous mount, make sure that the rename transaction | |
2672 | * goes to disk before returning to the user. | |
2673 | */ | |
2674 | if (tp->t_mountp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
2675 | xfs_trans_set_sync(tp); | |
2676 | ||
2c3234d1 | 2677 | error = xfs_defer_finish(&tp, dfops, NULL); |
310606b0 | 2678 | if (error) { |
2c3234d1 | 2679 | xfs_defer_cancel(dfops); |
4906e215 | 2680 | xfs_trans_cancel(tp); |
310606b0 DC |
2681 | return error; |
2682 | } | |
2683 | ||
70393313 | 2684 | return xfs_trans_commit(tp); |
310606b0 DC |
2685 | } |
2686 | ||
d31a1825 CM |
2687 | /* |
2688 | * xfs_cross_rename() | |
2689 | * | |
2690 | * responsible for handling RENAME_EXCHANGE flag in renameat2() sytemcall | |
2691 | */ | |
2692 | STATIC int | |
2693 | xfs_cross_rename( | |
2694 | struct xfs_trans *tp, | |
2695 | struct xfs_inode *dp1, | |
2696 | struct xfs_name *name1, | |
2697 | struct xfs_inode *ip1, | |
2698 | struct xfs_inode *dp2, | |
2699 | struct xfs_name *name2, | |
2700 | struct xfs_inode *ip2, | |
2c3234d1 | 2701 | struct xfs_defer_ops *dfops, |
d31a1825 CM |
2702 | xfs_fsblock_t *first_block, |
2703 | int spaceres) | |
2704 | { | |
2705 | int error = 0; | |
2706 | int ip1_flags = 0; | |
2707 | int ip2_flags = 0; | |
2708 | int dp2_flags = 0; | |
2709 | ||
2710 | /* Swap inode number for dirent in first parent */ | |
2711 | error = xfs_dir_replace(tp, dp1, name1, | |
2712 | ip2->i_ino, | |
2c3234d1 | 2713 | first_block, dfops, spaceres); |
d31a1825 | 2714 | if (error) |
eeacd321 | 2715 | goto out_trans_abort; |
d31a1825 CM |
2716 | |
2717 | /* Swap inode number for dirent in second parent */ | |
2718 | error = xfs_dir_replace(tp, dp2, name2, | |
2719 | ip1->i_ino, | |
2c3234d1 | 2720 | first_block, dfops, spaceres); |
d31a1825 | 2721 | if (error) |
eeacd321 | 2722 | goto out_trans_abort; |
d31a1825 CM |
2723 | |
2724 | /* | |
2725 | * If we're renaming one or more directories across different parents, | |
2726 | * update the respective ".." entries (and link counts) to match the new | |
2727 | * parents. | |
2728 | */ | |
2729 | if (dp1 != dp2) { | |
2730 | dp2_flags = XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2731 | ||
c19b3b05 | 2732 | if (S_ISDIR(VFS_I(ip2)->i_mode)) { |
d31a1825 CM |
2733 | error = xfs_dir_replace(tp, ip2, &xfs_name_dotdot, |
2734 | dp1->i_ino, first_block, | |
2c3234d1 | 2735 | dfops, spaceres); |
d31a1825 | 2736 | if (error) |
eeacd321 | 2737 | goto out_trans_abort; |
d31a1825 CM |
2738 | |
2739 | /* transfer ip2 ".." reference to dp1 */ | |
c19b3b05 | 2740 | if (!S_ISDIR(VFS_I(ip1)->i_mode)) { |
d31a1825 CM |
2741 | error = xfs_droplink(tp, dp2); |
2742 | if (error) | |
eeacd321 | 2743 | goto out_trans_abort; |
d31a1825 CM |
2744 | error = xfs_bumplink(tp, dp1); |
2745 | if (error) | |
eeacd321 | 2746 | goto out_trans_abort; |
d31a1825 CM |
2747 | } |
2748 | ||
2749 | /* | |
2750 | * Although ip1 isn't changed here, userspace needs | |
2751 | * to be warned about the change, so that applications | |
2752 | * relying on it (like backup ones), will properly | |
2753 | * notify the change | |
2754 | */ | |
2755 | ip1_flags |= XFS_ICHGTIME_CHG; | |
2756 | ip2_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2757 | } | |
2758 | ||
c19b3b05 | 2759 | if (S_ISDIR(VFS_I(ip1)->i_mode)) { |
d31a1825 CM |
2760 | error = xfs_dir_replace(tp, ip1, &xfs_name_dotdot, |
2761 | dp2->i_ino, first_block, | |
2c3234d1 | 2762 | dfops, spaceres); |
d31a1825 | 2763 | if (error) |
eeacd321 | 2764 | goto out_trans_abort; |
d31a1825 CM |
2765 | |
2766 | /* transfer ip1 ".." reference to dp2 */ | |
c19b3b05 | 2767 | if (!S_ISDIR(VFS_I(ip2)->i_mode)) { |
d31a1825 CM |
2768 | error = xfs_droplink(tp, dp1); |
2769 | if (error) | |
eeacd321 | 2770 | goto out_trans_abort; |
d31a1825 CM |
2771 | error = xfs_bumplink(tp, dp2); |
2772 | if (error) | |
eeacd321 | 2773 | goto out_trans_abort; |
d31a1825 CM |
2774 | } |
2775 | ||
2776 | /* | |
2777 | * Although ip2 isn't changed here, userspace needs | |
2778 | * to be warned about the change, so that applications | |
2779 | * relying on it (like backup ones), will properly | |
2780 | * notify the change | |
2781 | */ | |
2782 | ip1_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2783 | ip2_flags |= XFS_ICHGTIME_CHG; | |
2784 | } | |
2785 | } | |
2786 | ||
2787 | if (ip1_flags) { | |
2788 | xfs_trans_ichgtime(tp, ip1, ip1_flags); | |
2789 | xfs_trans_log_inode(tp, ip1, XFS_ILOG_CORE); | |
2790 | } | |
2791 | if (ip2_flags) { | |
2792 | xfs_trans_ichgtime(tp, ip2, ip2_flags); | |
2793 | xfs_trans_log_inode(tp, ip2, XFS_ILOG_CORE); | |
2794 | } | |
2795 | if (dp2_flags) { | |
2796 | xfs_trans_ichgtime(tp, dp2, dp2_flags); | |
2797 | xfs_trans_log_inode(tp, dp2, XFS_ILOG_CORE); | |
2798 | } | |
2799 | xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2800 | xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE); | |
2c3234d1 | 2801 | return xfs_finish_rename(tp, dfops); |
eeacd321 DC |
2802 | |
2803 | out_trans_abort: | |
2c3234d1 | 2804 | xfs_defer_cancel(dfops); |
4906e215 | 2805 | xfs_trans_cancel(tp); |
d31a1825 CM |
2806 | return error; |
2807 | } | |
2808 | ||
7dcf5c3e DC |
2809 | /* |
2810 | * xfs_rename_alloc_whiteout() | |
2811 | * | |
2812 | * Return a referenced, unlinked, unlocked inode that that can be used as a | |
2813 | * whiteout in a rename transaction. We use a tmpfile inode here so that if we | |
2814 | * crash between allocating the inode and linking it into the rename transaction | |
2815 | * recovery will free the inode and we won't leak it. | |
2816 | */ | |
2817 | static int | |
2818 | xfs_rename_alloc_whiteout( | |
2819 | struct xfs_inode *dp, | |
2820 | struct xfs_inode **wip) | |
2821 | { | |
2822 | struct xfs_inode *tmpfile; | |
2823 | int error; | |
2824 | ||
2825 | error = xfs_create_tmpfile(dp, NULL, S_IFCHR | WHITEOUT_MODE, &tmpfile); | |
2826 | if (error) | |
2827 | return error; | |
2828 | ||
22419ac9 BF |
2829 | /* |
2830 | * Prepare the tmpfile inode as if it were created through the VFS. | |
2831 | * Otherwise, the link increment paths will complain about nlink 0->1. | |
2832 | * Drop the link count as done by d_tmpfile(), complete the inode setup | |
2833 | * and flag it as linkable. | |
2834 | */ | |
2835 | drop_nlink(VFS_I(tmpfile)); | |
2b3d1d41 | 2836 | xfs_setup_iops(tmpfile); |
7dcf5c3e DC |
2837 | xfs_finish_inode_setup(tmpfile); |
2838 | VFS_I(tmpfile)->i_state |= I_LINKABLE; | |
2839 | ||
2840 | *wip = tmpfile; | |
2841 | return 0; | |
2842 | } | |
2843 | ||
f6bba201 DC |
2844 | /* |
2845 | * xfs_rename | |
2846 | */ | |
2847 | int | |
2848 | xfs_rename( | |
7dcf5c3e DC |
2849 | struct xfs_inode *src_dp, |
2850 | struct xfs_name *src_name, | |
2851 | struct xfs_inode *src_ip, | |
2852 | struct xfs_inode *target_dp, | |
2853 | struct xfs_name *target_name, | |
2854 | struct xfs_inode *target_ip, | |
2855 | unsigned int flags) | |
f6bba201 | 2856 | { |
7dcf5c3e DC |
2857 | struct xfs_mount *mp = src_dp->i_mount; |
2858 | struct xfs_trans *tp; | |
2c3234d1 | 2859 | struct xfs_defer_ops dfops; |
7dcf5c3e DC |
2860 | xfs_fsblock_t first_block; |
2861 | struct xfs_inode *wip = NULL; /* whiteout inode */ | |
2862 | struct xfs_inode *inodes[__XFS_SORT_INODES]; | |
2863 | int num_inodes = __XFS_SORT_INODES; | |
2b93681f | 2864 | bool new_parent = (src_dp != target_dp); |
c19b3b05 | 2865 | bool src_is_directory = S_ISDIR(VFS_I(src_ip)->i_mode); |
7dcf5c3e DC |
2866 | int spaceres; |
2867 | int error; | |
f6bba201 DC |
2868 | |
2869 | trace_xfs_rename(src_dp, target_dp, src_name, target_name); | |
2870 | ||
eeacd321 DC |
2871 | if ((flags & RENAME_EXCHANGE) && !target_ip) |
2872 | return -EINVAL; | |
2873 | ||
7dcf5c3e DC |
2874 | /* |
2875 | * If we are doing a whiteout operation, allocate the whiteout inode | |
2876 | * we will be placing at the target and ensure the type is set | |
2877 | * appropriately. | |
2878 | */ | |
2879 | if (flags & RENAME_WHITEOUT) { | |
2880 | ASSERT(!(flags & (RENAME_NOREPLACE | RENAME_EXCHANGE))); | |
2881 | error = xfs_rename_alloc_whiteout(target_dp, &wip); | |
2882 | if (error) | |
2883 | return error; | |
2884 | ||
2885 | /* setup target dirent info as whiteout */ | |
2886 | src_name->type = XFS_DIR3_FT_CHRDEV; | |
2887 | } | |
f6bba201 | 2888 | |
7dcf5c3e | 2889 | xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, wip, |
f6bba201 DC |
2890 | inodes, &num_inodes); |
2891 | ||
f6bba201 | 2892 | spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len); |
253f4911 | 2893 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, spaceres, 0, 0, &tp); |
2451337d | 2894 | if (error == -ENOSPC) { |
f6bba201 | 2895 | spaceres = 0; |
253f4911 CH |
2896 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, 0, 0, 0, |
2897 | &tp); | |
f6bba201 | 2898 | } |
445883e8 | 2899 | if (error) |
253f4911 | 2900 | goto out_release_wip; |
f6bba201 DC |
2901 | |
2902 | /* | |
2903 | * Attach the dquots to the inodes | |
2904 | */ | |
2905 | error = xfs_qm_vop_rename_dqattach(inodes); | |
445883e8 DC |
2906 | if (error) |
2907 | goto out_trans_cancel; | |
f6bba201 DC |
2908 | |
2909 | /* | |
2910 | * Lock all the participating inodes. Depending upon whether | |
2911 | * the target_name exists in the target directory, and | |
2912 | * whether the target directory is the same as the source | |
2913 | * directory, we can lock from 2 to 4 inodes. | |
2914 | */ | |
dbad7c99 DC |
2915 | if (!new_parent) |
2916 | xfs_ilock(src_dp, XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); | |
2917 | else | |
2918 | xfs_lock_two_inodes(src_dp, target_dp, | |
2919 | XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); | |
2920 | ||
f6bba201 DC |
2921 | xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL); |
2922 | ||
2923 | /* | |
2924 | * Join all the inodes to the transaction. From this point on, | |
2925 | * we can rely on either trans_commit or trans_cancel to unlock | |
2926 | * them. | |
2927 | */ | |
dbad7c99 | 2928 | xfs_trans_ijoin(tp, src_dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
f6bba201 | 2929 | if (new_parent) |
dbad7c99 | 2930 | xfs_trans_ijoin(tp, target_dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
f6bba201 DC |
2931 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); |
2932 | if (target_ip) | |
2933 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); | |
7dcf5c3e DC |
2934 | if (wip) |
2935 | xfs_trans_ijoin(tp, wip, XFS_ILOCK_EXCL); | |
f6bba201 DC |
2936 | |
2937 | /* | |
2938 | * If we are using project inheritance, we only allow renames | |
2939 | * into our tree when the project IDs are the same; else the | |
2940 | * tree quota mechanism would be circumvented. | |
2941 | */ | |
2942 | if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2943 | (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) { | |
2451337d | 2944 | error = -EXDEV; |
445883e8 | 2945 | goto out_trans_cancel; |
f6bba201 DC |
2946 | } |
2947 | ||
2c3234d1 | 2948 | xfs_defer_init(&dfops, &first_block); |
445883e8 | 2949 | |
eeacd321 DC |
2950 | /* RENAME_EXCHANGE is unique from here on. */ |
2951 | if (flags & RENAME_EXCHANGE) | |
2952 | return xfs_cross_rename(tp, src_dp, src_name, src_ip, | |
2953 | target_dp, target_name, target_ip, | |
2c3234d1 | 2954 | &dfops, &first_block, spaceres); |
d31a1825 | 2955 | |
f6bba201 DC |
2956 | /* |
2957 | * Set up the target. | |
2958 | */ | |
2959 | if (target_ip == NULL) { | |
2960 | /* | |
2961 | * If there's no space reservation, check the entry will | |
2962 | * fit before actually inserting it. | |
2963 | */ | |
94f3cad5 ES |
2964 | if (!spaceres) { |
2965 | error = xfs_dir_canenter(tp, target_dp, target_name); | |
2966 | if (error) | |
445883e8 | 2967 | goto out_trans_cancel; |
94f3cad5 | 2968 | } |
f6bba201 DC |
2969 | /* |
2970 | * If target does not exist and the rename crosses | |
2971 | * directories, adjust the target directory link count | |
2972 | * to account for the ".." reference from the new entry. | |
2973 | */ | |
2974 | error = xfs_dir_createname(tp, target_dp, target_name, | |
2975 | src_ip->i_ino, &first_block, | |
2c3234d1 | 2976 | &dfops, spaceres); |
f6bba201 | 2977 | if (error) |
4906e215 | 2978 | goto out_bmap_cancel; |
f6bba201 DC |
2979 | |
2980 | xfs_trans_ichgtime(tp, target_dp, | |
2981 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2982 | ||
2983 | if (new_parent && src_is_directory) { | |
2984 | error = xfs_bumplink(tp, target_dp); | |
2985 | if (error) | |
4906e215 | 2986 | goto out_bmap_cancel; |
f6bba201 DC |
2987 | } |
2988 | } else { /* target_ip != NULL */ | |
2989 | /* | |
2990 | * If target exists and it's a directory, check that both | |
2991 | * target and source are directories and that target can be | |
2992 | * destroyed, or that neither is a directory. | |
2993 | */ | |
c19b3b05 | 2994 | if (S_ISDIR(VFS_I(target_ip)->i_mode)) { |
f6bba201 DC |
2995 | /* |
2996 | * Make sure target dir is empty. | |
2997 | */ | |
2998 | if (!(xfs_dir_isempty(target_ip)) || | |
54d7b5c1 | 2999 | (VFS_I(target_ip)->i_nlink > 2)) { |
2451337d | 3000 | error = -EEXIST; |
445883e8 | 3001 | goto out_trans_cancel; |
f6bba201 DC |
3002 | } |
3003 | } | |
3004 | ||
3005 | /* | |
3006 | * Link the source inode under the target name. | |
3007 | * If the source inode is a directory and we are moving | |
3008 | * it across directories, its ".." entry will be | |
3009 | * inconsistent until we replace that down below. | |
3010 | * | |
3011 | * In case there is already an entry with the same | |
3012 | * name at the destination directory, remove it first. | |
3013 | */ | |
3014 | error = xfs_dir_replace(tp, target_dp, target_name, | |
3015 | src_ip->i_ino, | |
2c3234d1 | 3016 | &first_block, &dfops, spaceres); |
f6bba201 | 3017 | if (error) |
4906e215 | 3018 | goto out_bmap_cancel; |
f6bba201 DC |
3019 | |
3020 | xfs_trans_ichgtime(tp, target_dp, | |
3021 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3022 | ||
3023 | /* | |
3024 | * Decrement the link count on the target since the target | |
3025 | * dir no longer points to it. | |
3026 | */ | |
3027 | error = xfs_droplink(tp, target_ip); | |
3028 | if (error) | |
4906e215 | 3029 | goto out_bmap_cancel; |
f6bba201 DC |
3030 | |
3031 | if (src_is_directory) { | |
3032 | /* | |
3033 | * Drop the link from the old "." entry. | |
3034 | */ | |
3035 | error = xfs_droplink(tp, target_ip); | |
3036 | if (error) | |
4906e215 | 3037 | goto out_bmap_cancel; |
f6bba201 DC |
3038 | } |
3039 | } /* target_ip != NULL */ | |
3040 | ||
3041 | /* | |
3042 | * Remove the source. | |
3043 | */ | |
3044 | if (new_parent && src_is_directory) { | |
3045 | /* | |
3046 | * Rewrite the ".." entry to point to the new | |
3047 | * directory. | |
3048 | */ | |
3049 | error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot, | |
3050 | target_dp->i_ino, | |
2c3234d1 | 3051 | &first_block, &dfops, spaceres); |
2451337d | 3052 | ASSERT(error != -EEXIST); |
f6bba201 | 3053 | if (error) |
4906e215 | 3054 | goto out_bmap_cancel; |
f6bba201 DC |
3055 | } |
3056 | ||
3057 | /* | |
3058 | * We always want to hit the ctime on the source inode. | |
3059 | * | |
3060 | * This isn't strictly required by the standards since the source | |
3061 | * inode isn't really being changed, but old unix file systems did | |
3062 | * it and some incremental backup programs won't work without it. | |
3063 | */ | |
3064 | xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); | |
3065 | xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); | |
3066 | ||
3067 | /* | |
3068 | * Adjust the link count on src_dp. This is necessary when | |
3069 | * renaming a directory, either within one parent when | |
3070 | * the target existed, or across two parent directories. | |
3071 | */ | |
3072 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
3073 | ||
3074 | /* | |
3075 | * Decrement link count on src_directory since the | |
3076 | * entry that's moved no longer points to it. | |
3077 | */ | |
3078 | error = xfs_droplink(tp, src_dp); | |
3079 | if (error) | |
4906e215 | 3080 | goto out_bmap_cancel; |
f6bba201 DC |
3081 | } |
3082 | ||
7dcf5c3e DC |
3083 | /* |
3084 | * For whiteouts, we only need to update the source dirent with the | |
3085 | * inode number of the whiteout inode rather than removing it | |
3086 | * altogether. | |
3087 | */ | |
3088 | if (wip) { | |
3089 | error = xfs_dir_replace(tp, src_dp, src_name, wip->i_ino, | |
2c3234d1 | 3090 | &first_block, &dfops, spaceres); |
7dcf5c3e DC |
3091 | } else |
3092 | error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino, | |
2c3234d1 | 3093 | &first_block, &dfops, spaceres); |
f6bba201 | 3094 | if (error) |
4906e215 | 3095 | goto out_bmap_cancel; |
f6bba201 DC |
3096 | |
3097 | /* | |
7dcf5c3e DC |
3098 | * For whiteouts, we need to bump the link count on the whiteout inode. |
3099 | * This means that failures all the way up to this point leave the inode | |
3100 | * on the unlinked list and so cleanup is a simple matter of dropping | |
3101 | * the remaining reference to it. If we fail here after bumping the link | |
3102 | * count, we're shutting down the filesystem so we'll never see the | |
3103 | * intermediate state on disk. | |
f6bba201 | 3104 | */ |
7dcf5c3e | 3105 | if (wip) { |
54d7b5c1 | 3106 | ASSERT(VFS_I(wip)->i_nlink == 0); |
7dcf5c3e DC |
3107 | error = xfs_bumplink(tp, wip); |
3108 | if (error) | |
4906e215 | 3109 | goto out_bmap_cancel; |
7dcf5c3e DC |
3110 | error = xfs_iunlink_remove(tp, wip); |
3111 | if (error) | |
4906e215 | 3112 | goto out_bmap_cancel; |
7dcf5c3e | 3113 | xfs_trans_log_inode(tp, wip, XFS_ILOG_CORE); |
f6bba201 | 3114 | |
7dcf5c3e DC |
3115 | /* |
3116 | * Now we have a real link, clear the "I'm a tmpfile" state | |
3117 | * flag from the inode so it doesn't accidentally get misused in | |
3118 | * future. | |
3119 | */ | |
3120 | VFS_I(wip)->i_state &= ~I_LINKABLE; | |
f6bba201 DC |
3121 | } |
3122 | ||
f6bba201 DC |
3123 | xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
3124 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); | |
3125 | if (new_parent) | |
3126 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); | |
f6bba201 | 3127 | |
2c3234d1 | 3128 | error = xfs_finish_rename(tp, &dfops); |
7dcf5c3e DC |
3129 | if (wip) |
3130 | IRELE(wip); | |
3131 | return error; | |
f6bba201 | 3132 | |
445883e8 | 3133 | out_bmap_cancel: |
2c3234d1 | 3134 | xfs_defer_cancel(&dfops); |
445883e8 | 3135 | out_trans_cancel: |
4906e215 | 3136 | xfs_trans_cancel(tp); |
253f4911 | 3137 | out_release_wip: |
7dcf5c3e DC |
3138 | if (wip) |
3139 | IRELE(wip); | |
f6bba201 DC |
3140 | return error; |
3141 | } | |
3142 | ||
5c4d97d0 DC |
3143 | STATIC int |
3144 | xfs_iflush_cluster( | |
19429363 DC |
3145 | struct xfs_inode *ip, |
3146 | struct xfs_buf *bp) | |
1da177e4 | 3147 | { |
19429363 | 3148 | struct xfs_mount *mp = ip->i_mount; |
5c4d97d0 DC |
3149 | struct xfs_perag *pag; |
3150 | unsigned long first_index, mask; | |
3151 | unsigned long inodes_per_cluster; | |
19429363 DC |
3152 | int cilist_size; |
3153 | struct xfs_inode **cilist; | |
3154 | struct xfs_inode *cip; | |
5c4d97d0 DC |
3155 | int nr_found; |
3156 | int clcount = 0; | |
3157 | int bufwasdelwri; | |
1da177e4 | 3158 | int i; |
1da177e4 | 3159 | |
5c4d97d0 | 3160 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); |
1da177e4 | 3161 | |
0f49efd8 | 3162 | inodes_per_cluster = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; |
19429363 DC |
3163 | cilist_size = inodes_per_cluster * sizeof(xfs_inode_t *); |
3164 | cilist = kmem_alloc(cilist_size, KM_MAYFAIL|KM_NOFS); | |
3165 | if (!cilist) | |
5c4d97d0 | 3166 | goto out_put; |
1da177e4 | 3167 | |
0f49efd8 | 3168 | mask = ~(((mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog)) - 1); |
5c4d97d0 DC |
3169 | first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; |
3170 | rcu_read_lock(); | |
3171 | /* really need a gang lookup range call here */ | |
19429363 | 3172 | nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)cilist, |
5c4d97d0 DC |
3173 | first_index, inodes_per_cluster); |
3174 | if (nr_found == 0) | |
3175 | goto out_free; | |
3176 | ||
3177 | for (i = 0; i < nr_found; i++) { | |
19429363 DC |
3178 | cip = cilist[i]; |
3179 | if (cip == ip) | |
bad55843 | 3180 | continue; |
1a3e8f3d DC |
3181 | |
3182 | /* | |
3183 | * because this is an RCU protected lookup, we could find a | |
3184 | * recently freed or even reallocated inode during the lookup. | |
3185 | * We need to check under the i_flags_lock for a valid inode | |
3186 | * here. Skip it if it is not valid or the wrong inode. | |
3187 | */ | |
19429363 DC |
3188 | spin_lock(&cip->i_flags_lock); |
3189 | if (!cip->i_ino || | |
3190 | __xfs_iflags_test(cip, XFS_ISTALE)) { | |
3191 | spin_unlock(&cip->i_flags_lock); | |
1a3e8f3d DC |
3192 | continue; |
3193 | } | |
5a90e53e DC |
3194 | |
3195 | /* | |
3196 | * Once we fall off the end of the cluster, no point checking | |
3197 | * any more inodes in the list because they will also all be | |
3198 | * outside the cluster. | |
3199 | */ | |
19429363 DC |
3200 | if ((XFS_INO_TO_AGINO(mp, cip->i_ino) & mask) != first_index) { |
3201 | spin_unlock(&cip->i_flags_lock); | |
5a90e53e DC |
3202 | break; |
3203 | } | |
19429363 | 3204 | spin_unlock(&cip->i_flags_lock); |
1a3e8f3d | 3205 | |
bad55843 DC |
3206 | /* |
3207 | * Do an un-protected check to see if the inode is dirty and | |
3208 | * is a candidate for flushing. These checks will be repeated | |
3209 | * later after the appropriate locks are acquired. | |
3210 | */ | |
19429363 | 3211 | if (xfs_inode_clean(cip) && xfs_ipincount(cip) == 0) |
bad55843 | 3212 | continue; |
bad55843 DC |
3213 | |
3214 | /* | |
3215 | * Try to get locks. If any are unavailable or it is pinned, | |
3216 | * then this inode cannot be flushed and is skipped. | |
3217 | */ | |
3218 | ||
19429363 | 3219 | if (!xfs_ilock_nowait(cip, XFS_ILOCK_SHARED)) |
bad55843 | 3220 | continue; |
19429363 DC |
3221 | if (!xfs_iflock_nowait(cip)) { |
3222 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3223 | continue; |
3224 | } | |
19429363 DC |
3225 | if (xfs_ipincount(cip)) { |
3226 | xfs_ifunlock(cip); | |
3227 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3228 | continue; |
3229 | } | |
3230 | ||
8a17d7dd DC |
3231 | |
3232 | /* | |
3233 | * Check the inode number again, just to be certain we are not | |
3234 | * racing with freeing in xfs_reclaim_inode(). See the comments | |
3235 | * in that function for more information as to why the initial | |
3236 | * check is not sufficient. | |
3237 | */ | |
19429363 DC |
3238 | if (!cip->i_ino) { |
3239 | xfs_ifunlock(cip); | |
3240 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3241 | continue; |
3242 | } | |
3243 | ||
3244 | /* | |
3245 | * arriving here means that this inode can be flushed. First | |
3246 | * re-check that it's dirty before flushing. | |
3247 | */ | |
19429363 | 3248 | if (!xfs_inode_clean(cip)) { |
33540408 | 3249 | int error; |
19429363 | 3250 | error = xfs_iflush_int(cip, bp); |
bad55843 | 3251 | if (error) { |
19429363 | 3252 | xfs_iunlock(cip, XFS_ILOCK_SHARED); |
bad55843 DC |
3253 | goto cluster_corrupt_out; |
3254 | } | |
3255 | clcount++; | |
3256 | } else { | |
19429363 | 3257 | xfs_ifunlock(cip); |
bad55843 | 3258 | } |
19429363 | 3259 | xfs_iunlock(cip, XFS_ILOCK_SHARED); |
bad55843 DC |
3260 | } |
3261 | ||
3262 | if (clcount) { | |
ff6d6af2 BD |
3263 | XFS_STATS_INC(mp, xs_icluster_flushcnt); |
3264 | XFS_STATS_ADD(mp, xs_icluster_flushinode, clcount); | |
bad55843 DC |
3265 | } |
3266 | ||
3267 | out_free: | |
1a3e8f3d | 3268 | rcu_read_unlock(); |
19429363 | 3269 | kmem_free(cilist); |
44b56e0a DC |
3270 | out_put: |
3271 | xfs_perag_put(pag); | |
bad55843 DC |
3272 | return 0; |
3273 | ||
3274 | ||
3275 | cluster_corrupt_out: | |
3276 | /* | |
3277 | * Corruption detected in the clustering loop. Invalidate the | |
3278 | * inode buffer and shut down the filesystem. | |
3279 | */ | |
1a3e8f3d | 3280 | rcu_read_unlock(); |
bad55843 | 3281 | /* |
43ff2122 | 3282 | * Clean up the buffer. If it was delwri, just release it -- |
bad55843 DC |
3283 | * brelse can handle it with no problems. If not, shut down the |
3284 | * filesystem before releasing the buffer. | |
3285 | */ | |
43ff2122 | 3286 | bufwasdelwri = (bp->b_flags & _XBF_DELWRI_Q); |
bad55843 DC |
3287 | if (bufwasdelwri) |
3288 | xfs_buf_relse(bp); | |
3289 | ||
3290 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
3291 | ||
3292 | if (!bufwasdelwri) { | |
3293 | /* | |
3294 | * Just like incore_relse: if we have b_iodone functions, | |
3295 | * mark the buffer as an error and call them. Otherwise | |
3296 | * mark it as stale and brelse. | |
3297 | */ | |
cb669ca5 | 3298 | if (bp->b_iodone) { |
b0388bf1 | 3299 | bp->b_flags &= ~XBF_DONE; |
c867cb61 | 3300 | xfs_buf_stale(bp); |
2451337d | 3301 | xfs_buf_ioerror(bp, -EIO); |
e8aaba9a | 3302 | xfs_buf_ioend(bp); |
bad55843 | 3303 | } else { |
c867cb61 | 3304 | xfs_buf_stale(bp); |
bad55843 DC |
3305 | xfs_buf_relse(bp); |
3306 | } | |
3307 | } | |
3308 | ||
3309 | /* | |
3310 | * Unlocks the flush lock | |
3311 | */ | |
19429363 DC |
3312 | xfs_iflush_abort(cip, false); |
3313 | kmem_free(cilist); | |
44b56e0a | 3314 | xfs_perag_put(pag); |
2451337d | 3315 | return -EFSCORRUPTED; |
bad55843 DC |
3316 | } |
3317 | ||
1da177e4 | 3318 | /* |
4c46819a CH |
3319 | * Flush dirty inode metadata into the backing buffer. |
3320 | * | |
3321 | * The caller must have the inode lock and the inode flush lock held. The | |
3322 | * inode lock will still be held upon return to the caller, and the inode | |
3323 | * flush lock will be released after the inode has reached the disk. | |
3324 | * | |
3325 | * The caller must write out the buffer returned in *bpp and release it. | |
1da177e4 LT |
3326 | */ |
3327 | int | |
3328 | xfs_iflush( | |
4c46819a CH |
3329 | struct xfs_inode *ip, |
3330 | struct xfs_buf **bpp) | |
1da177e4 | 3331 | { |
4c46819a | 3332 | struct xfs_mount *mp = ip->i_mount; |
b1438f47 | 3333 | struct xfs_buf *bp = NULL; |
4c46819a | 3334 | struct xfs_dinode *dip; |
1da177e4 | 3335 | int error; |
1da177e4 | 3336 | |
ff6d6af2 | 3337 | XFS_STATS_INC(mp, xs_iflush_count); |
1da177e4 | 3338 | |
579aa9ca | 3339 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 3340 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 3341 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 3342 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
1da177e4 | 3343 | |
4c46819a | 3344 | *bpp = NULL; |
1da177e4 | 3345 | |
1da177e4 LT |
3346 | xfs_iunpin_wait(ip); |
3347 | ||
4b6a4688 DC |
3348 | /* |
3349 | * For stale inodes we cannot rely on the backing buffer remaining | |
3350 | * stale in cache for the remaining life of the stale inode and so | |
475ee413 | 3351 | * xfs_imap_to_bp() below may give us a buffer that no longer contains |
4b6a4688 DC |
3352 | * inodes below. We have to check this after ensuring the inode is |
3353 | * unpinned so that it is safe to reclaim the stale inode after the | |
3354 | * flush call. | |
3355 | */ | |
3356 | if (xfs_iflags_test(ip, XFS_ISTALE)) { | |
3357 | xfs_ifunlock(ip); | |
3358 | return 0; | |
3359 | } | |
3360 | ||
1da177e4 LT |
3361 | /* |
3362 | * This may have been unpinned because the filesystem is shutting | |
3363 | * down forcibly. If that's the case we must not write this inode | |
32ce90a4 CH |
3364 | * to disk, because the log record didn't make it to disk. |
3365 | * | |
3366 | * We also have to remove the log item from the AIL in this case, | |
3367 | * as we wait for an empty AIL as part of the unmount process. | |
1da177e4 LT |
3368 | */ |
3369 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 3370 | error = -EIO; |
32ce90a4 | 3371 | goto abort_out; |
1da177e4 LT |
3372 | } |
3373 | ||
a3f74ffb | 3374 | /* |
b1438f47 DC |
3375 | * Get the buffer containing the on-disk inode. We are doing a try-lock |
3376 | * operation here, so we may get an EAGAIN error. In that case, we | |
3377 | * simply want to return with the inode still dirty. | |
3378 | * | |
3379 | * If we get any other error, we effectively have a corruption situation | |
3380 | * and we cannot flush the inode, so we treat it the same as failing | |
3381 | * xfs_iflush_int(). | |
a3f74ffb | 3382 | */ |
475ee413 CH |
3383 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, XBF_TRYLOCK, |
3384 | 0); | |
b1438f47 | 3385 | if (error == -EAGAIN) { |
a3f74ffb DC |
3386 | xfs_ifunlock(ip); |
3387 | return error; | |
3388 | } | |
b1438f47 DC |
3389 | if (error) |
3390 | goto corrupt_out; | |
a3f74ffb | 3391 | |
1da177e4 LT |
3392 | /* |
3393 | * First flush out the inode that xfs_iflush was called with. | |
3394 | */ | |
3395 | error = xfs_iflush_int(ip, bp); | |
bad55843 | 3396 | if (error) |
1da177e4 | 3397 | goto corrupt_out; |
1da177e4 | 3398 | |
a3f74ffb DC |
3399 | /* |
3400 | * If the buffer is pinned then push on the log now so we won't | |
3401 | * get stuck waiting in the write for too long. | |
3402 | */ | |
811e64c7 | 3403 | if (xfs_buf_ispinned(bp)) |
a14a348b | 3404 | xfs_log_force(mp, 0); |
a3f74ffb | 3405 | |
1da177e4 LT |
3406 | /* |
3407 | * inode clustering: | |
3408 | * see if other inodes can be gathered into this write | |
3409 | */ | |
bad55843 DC |
3410 | error = xfs_iflush_cluster(ip, bp); |
3411 | if (error) | |
3412 | goto cluster_corrupt_out; | |
1da177e4 | 3413 | |
4c46819a CH |
3414 | *bpp = bp; |
3415 | return 0; | |
1da177e4 LT |
3416 | |
3417 | corrupt_out: | |
b1438f47 DC |
3418 | if (bp) |
3419 | xfs_buf_relse(bp); | |
7d04a335 | 3420 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
1da177e4 | 3421 | cluster_corrupt_out: |
2451337d | 3422 | error = -EFSCORRUPTED; |
32ce90a4 | 3423 | abort_out: |
1da177e4 LT |
3424 | /* |
3425 | * Unlocks the flush lock | |
3426 | */ | |
04913fdd | 3427 | xfs_iflush_abort(ip, false); |
32ce90a4 | 3428 | return error; |
1da177e4 LT |
3429 | } |
3430 | ||
1da177e4 LT |
3431 | STATIC int |
3432 | xfs_iflush_int( | |
93848a99 CH |
3433 | struct xfs_inode *ip, |
3434 | struct xfs_buf *bp) | |
1da177e4 | 3435 | { |
93848a99 CH |
3436 | struct xfs_inode_log_item *iip = ip->i_itemp; |
3437 | struct xfs_dinode *dip; | |
3438 | struct xfs_mount *mp = ip->i_mount; | |
1da177e4 | 3439 | |
579aa9ca | 3440 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 3441 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 3442 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 3443 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
93848a99 | 3444 | ASSERT(iip != NULL && iip->ili_fields != 0); |
263997a6 | 3445 | ASSERT(ip->i_d.di_version > 1); |
1da177e4 | 3446 | |
1da177e4 | 3447 | /* set *dip = inode's place in the buffer */ |
88ee2df7 | 3448 | dip = xfs_buf_offset(bp, ip->i_imap.im_boffset); |
1da177e4 | 3449 | |
69ef921b | 3450 | if (XFS_TEST_ERROR(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC), |
1da177e4 | 3451 | mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { |
6a19d939 DC |
3452 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3453 | "%s: Bad inode %Lu magic number 0x%x, ptr 0x%p", | |
3454 | __func__, ip->i_ino, be16_to_cpu(dip->di_magic), dip); | |
1da177e4 LT |
3455 | goto corrupt_out; |
3456 | } | |
c19b3b05 | 3457 | if (S_ISREG(VFS_I(ip)->i_mode)) { |
1da177e4 LT |
3458 | if (XFS_TEST_ERROR( |
3459 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
3460 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE), | |
3461 | mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) { | |
6a19d939 DC |
3462 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3463 | "%s: Bad regular inode %Lu, ptr 0x%p", | |
3464 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
3465 | goto corrupt_out; |
3466 | } | |
c19b3b05 | 3467 | } else if (S_ISDIR(VFS_I(ip)->i_mode)) { |
1da177e4 LT |
3468 | if (XFS_TEST_ERROR( |
3469 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
3470 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
3471 | (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL), | |
3472 | mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) { | |
6a19d939 DC |
3473 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3474 | "%s: Bad directory inode %Lu, ptr 0x%p", | |
3475 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
3476 | goto corrupt_out; |
3477 | } | |
3478 | } | |
3479 | if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents > | |
3480 | ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5, | |
3481 | XFS_RANDOM_IFLUSH_5)) { | |
6a19d939 DC |
3482 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3483 | "%s: detected corrupt incore inode %Lu, " | |
3484 | "total extents = %d, nblocks = %Ld, ptr 0x%p", | |
3485 | __func__, ip->i_ino, | |
1da177e4 | 3486 | ip->i_d.di_nextents + ip->i_d.di_anextents, |
6a19d939 | 3487 | ip->i_d.di_nblocks, ip); |
1da177e4 LT |
3488 | goto corrupt_out; |
3489 | } | |
3490 | if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize, | |
3491 | mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) { | |
6a19d939 DC |
3492 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3493 | "%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p", | |
3494 | __func__, ip->i_ino, ip->i_d.di_forkoff, ip); | |
1da177e4 LT |
3495 | goto corrupt_out; |
3496 | } | |
e60896d8 | 3497 | |
1da177e4 | 3498 | /* |
263997a6 | 3499 | * Inode item log recovery for v2 inodes are dependent on the |
e60896d8 DC |
3500 | * di_flushiter count for correct sequencing. We bump the flush |
3501 | * iteration count so we can detect flushes which postdate a log record | |
3502 | * during recovery. This is redundant as we now log every change and | |
3503 | * hence this can't happen but we need to still do it to ensure | |
3504 | * backwards compatibility with old kernels that predate logging all | |
3505 | * inode changes. | |
1da177e4 | 3506 | */ |
e60896d8 DC |
3507 | if (ip->i_d.di_version < 3) |
3508 | ip->i_d.di_flushiter++; | |
1da177e4 LT |
3509 | |
3510 | /* | |
3987848c DC |
3511 | * Copy the dirty parts of the inode into the on-disk inode. We always |
3512 | * copy out the core of the inode, because if the inode is dirty at all | |
3513 | * the core must be. | |
1da177e4 | 3514 | */ |
93f958f9 | 3515 | xfs_inode_to_disk(ip, dip, iip->ili_item.li_lsn); |
1da177e4 LT |
3516 | |
3517 | /* Wrap, we never let the log put out DI_MAX_FLUSH */ | |
3518 | if (ip->i_d.di_flushiter == DI_MAX_FLUSH) | |
3519 | ip->i_d.di_flushiter = 0; | |
3520 | ||
fd9fdba6 | 3521 | xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK); |
e4ac967b | 3522 | if (XFS_IFORK_Q(ip)) |
fd9fdba6 | 3523 | xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK); |
1da177e4 LT |
3524 | xfs_inobp_check(mp, bp); |
3525 | ||
3526 | /* | |
f5d8d5c4 CH |
3527 | * We've recorded everything logged in the inode, so we'd like to clear |
3528 | * the ili_fields bits so we don't log and flush things unnecessarily. | |
3529 | * However, we can't stop logging all this information until the data | |
3530 | * we've copied into the disk buffer is written to disk. If we did we | |
3531 | * might overwrite the copy of the inode in the log with all the data | |
3532 | * after re-logging only part of it, and in the face of a crash we | |
3533 | * wouldn't have all the data we need to recover. | |
1da177e4 | 3534 | * |
f5d8d5c4 CH |
3535 | * What we do is move the bits to the ili_last_fields field. When |
3536 | * logging the inode, these bits are moved back to the ili_fields field. | |
3537 | * In the xfs_iflush_done() routine we clear ili_last_fields, since we | |
3538 | * know that the information those bits represent is permanently on | |
3539 | * disk. As long as the flush completes before the inode is logged | |
3540 | * again, then both ili_fields and ili_last_fields will be cleared. | |
1da177e4 | 3541 | * |
f5d8d5c4 CH |
3542 | * We can play with the ili_fields bits here, because the inode lock |
3543 | * must be held exclusively in order to set bits there and the flush | |
3544 | * lock protects the ili_last_fields bits. Set ili_logged so the flush | |
3545 | * done routine can tell whether or not to look in the AIL. Also, store | |
3546 | * the current LSN of the inode so that we can tell whether the item has | |
3547 | * moved in the AIL from xfs_iflush_done(). In order to read the lsn we | |
3548 | * need the AIL lock, because it is a 64 bit value that cannot be read | |
3549 | * atomically. | |
1da177e4 | 3550 | */ |
93848a99 CH |
3551 | iip->ili_last_fields = iip->ili_fields; |
3552 | iip->ili_fields = 0; | |
fc0561ce | 3553 | iip->ili_fsync_fields = 0; |
93848a99 | 3554 | iip->ili_logged = 1; |
1da177e4 | 3555 | |
93848a99 CH |
3556 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
3557 | &iip->ili_item.li_lsn); | |
1da177e4 | 3558 | |
93848a99 CH |
3559 | /* |
3560 | * Attach the function xfs_iflush_done to the inode's | |
3561 | * buffer. This will remove the inode from the AIL | |
3562 | * and unlock the inode's flush lock when the inode is | |
3563 | * completely written to disk. | |
3564 | */ | |
3565 | xfs_buf_attach_iodone(bp, xfs_iflush_done, &iip->ili_item); | |
1da177e4 | 3566 | |
93848a99 CH |
3567 | /* generate the checksum. */ |
3568 | xfs_dinode_calc_crc(mp, dip); | |
1da177e4 | 3569 | |
93848a99 CH |
3570 | ASSERT(bp->b_fspriv != NULL); |
3571 | ASSERT(bp->b_iodone != NULL); | |
1da177e4 LT |
3572 | return 0; |
3573 | ||
3574 | corrupt_out: | |
2451337d | 3575 | return -EFSCORRUPTED; |
1da177e4 | 3576 | } |