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Commit | Line | Data |
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1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
40ebd81d RD |
18 | #include <linux/log2.h> |
19 | ||
1da177e4 | 20 | #include "xfs.h" |
a844f451 | 21 | #include "xfs_fs.h" |
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" |
aa8968f2 | 52 | #include "xfs_reflink.h" |
1da177e4 | 53 | |
1da177e4 | 54 | kmem_zone_t *xfs_inode_zone; |
1da177e4 LT |
55 | |
56 | /* | |
8f04c47a | 57 | * Used in xfs_itruncate_extents(). This is the maximum number of extents |
1da177e4 LT |
58 | * freed from a file in a single transaction. |
59 | */ | |
60 | #define XFS_ITRUNC_MAX_EXTENTS 2 | |
61 | ||
54d7b5c1 DC |
62 | STATIC int xfs_iflush_int(struct xfs_inode *, struct xfs_buf *); |
63 | STATIC int xfs_iunlink(struct xfs_trans *, struct xfs_inode *); | |
64 | STATIC int xfs_iunlink_remove(struct xfs_trans *, struct xfs_inode *); | |
ab297431 | 65 | |
2a0ec1d9 DC |
66 | /* |
67 | * helper function to extract extent size hint from inode | |
68 | */ | |
69 | xfs_extlen_t | |
70 | xfs_get_extsz_hint( | |
71 | struct xfs_inode *ip) | |
72 | { | |
73 | if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize) | |
74 | return ip->i_d.di_extsize; | |
75 | if (XFS_IS_REALTIME_INODE(ip)) | |
76 | return ip->i_mount->m_sb.sb_rextsize; | |
77 | return 0; | |
78 | } | |
79 | ||
f7ca3522 DW |
80 | /* |
81 | * Helper function to extract CoW extent size hint from inode. | |
82 | * Between the extent size hint and the CoW extent size hint, we | |
e153aa79 DW |
83 | * return the greater of the two. If the value is zero (automatic), |
84 | * use the default size. | |
f7ca3522 DW |
85 | */ |
86 | xfs_extlen_t | |
87 | xfs_get_cowextsz_hint( | |
88 | struct xfs_inode *ip) | |
89 | { | |
90 | xfs_extlen_t a, b; | |
91 | ||
92 | a = 0; | |
93 | if (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE) | |
94 | a = ip->i_d.di_cowextsize; | |
95 | b = xfs_get_extsz_hint(ip); | |
96 | ||
e153aa79 DW |
97 | a = max(a, b); |
98 | if (a == 0) | |
99 | return XFS_DEFAULT_COWEXTSZ_HINT; | |
100 | return a; | |
f7ca3522 DW |
101 | } |
102 | ||
fa96acad | 103 | /* |
efa70be1 CH |
104 | * These two are wrapper routines around the xfs_ilock() routine used to |
105 | * centralize some grungy code. They are used in places that wish to lock the | |
106 | * inode solely for reading the extents. The reason these places can't just | |
107 | * call xfs_ilock(ip, XFS_ILOCK_SHARED) is that the inode lock also guards to | |
108 | * bringing in of the extents from disk for a file in b-tree format. If the | |
109 | * inode is in b-tree format, then we need to lock the inode exclusively until | |
110 | * the extents are read in. Locking it exclusively all the time would limit | |
111 | * our parallelism unnecessarily, though. What we do instead is check to see | |
112 | * if the extents have been read in yet, and only lock the inode exclusively | |
113 | * if they have not. | |
fa96acad | 114 | * |
efa70be1 | 115 | * The functions return a value which should be given to the corresponding |
01f4f327 | 116 | * xfs_iunlock() call. |
fa96acad DC |
117 | */ |
118 | uint | |
309ecac8 CH |
119 | xfs_ilock_data_map_shared( |
120 | struct xfs_inode *ip) | |
fa96acad | 121 | { |
309ecac8 | 122 | uint lock_mode = XFS_ILOCK_SHARED; |
fa96acad | 123 | |
309ecac8 CH |
124 | if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE && |
125 | (ip->i_df.if_flags & XFS_IFEXTENTS) == 0) | |
fa96acad | 126 | lock_mode = XFS_ILOCK_EXCL; |
fa96acad | 127 | xfs_ilock(ip, lock_mode); |
fa96acad DC |
128 | return lock_mode; |
129 | } | |
130 | ||
efa70be1 CH |
131 | uint |
132 | xfs_ilock_attr_map_shared( | |
133 | struct xfs_inode *ip) | |
fa96acad | 134 | { |
efa70be1 CH |
135 | uint lock_mode = XFS_ILOCK_SHARED; |
136 | ||
137 | if (ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE && | |
138 | (ip->i_afp->if_flags & XFS_IFEXTENTS) == 0) | |
139 | lock_mode = XFS_ILOCK_EXCL; | |
140 | xfs_ilock(ip, lock_mode); | |
141 | return lock_mode; | |
fa96acad DC |
142 | } |
143 | ||
144 | /* | |
65523218 CH |
145 | * In addition to i_rwsem in the VFS inode, the xfs inode contains 2 |
146 | * multi-reader locks: i_mmap_lock and the i_lock. This routine allows | |
147 | * various combinations of the locks to be obtained. | |
fa96acad | 148 | * |
653c60b6 DC |
149 | * The 3 locks should always be ordered so that the IO lock is obtained first, |
150 | * the mmap lock second and the ilock last in order to prevent deadlock. | |
fa96acad | 151 | * |
653c60b6 DC |
152 | * Basic locking order: |
153 | * | |
65523218 | 154 | * i_rwsem -> i_mmap_lock -> page_lock -> i_ilock |
653c60b6 DC |
155 | * |
156 | * mmap_sem locking order: | |
157 | * | |
65523218 | 158 | * i_rwsem -> page lock -> mmap_sem |
653c60b6 DC |
159 | * mmap_sem -> i_mmap_lock -> page_lock |
160 | * | |
161 | * The difference in mmap_sem locking order mean that we cannot hold the | |
162 | * i_mmap_lock over syscall based read(2)/write(2) based IO. These IO paths can | |
163 | * fault in pages during copy in/out (for buffered IO) or require the mmap_sem | |
164 | * in get_user_pages() to map the user pages into the kernel address space for | |
65523218 | 165 | * direct IO. Similarly the i_rwsem cannot be taken inside a page fault because |
653c60b6 DC |
166 | * page faults already hold the mmap_sem. |
167 | * | |
168 | * Hence to serialise fully against both syscall and mmap based IO, we need to | |
65523218 | 169 | * take both the i_rwsem and the i_mmap_lock. These locks should *only* be both |
653c60b6 DC |
170 | * taken in places where we need to invalidate the page cache in a race |
171 | * free manner (e.g. truncate, hole punch and other extent manipulation | |
172 | * functions). | |
fa96acad DC |
173 | */ |
174 | void | |
175 | xfs_ilock( | |
176 | xfs_inode_t *ip, | |
177 | uint lock_flags) | |
178 | { | |
179 | trace_xfs_ilock(ip, lock_flags, _RET_IP_); | |
180 | ||
181 | /* | |
182 | * You can't set both SHARED and EXCL for the same lock, | |
183 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
184 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
185 | */ | |
186 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
187 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
188 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
189 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
190 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
191 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 192 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad | 193 | |
65523218 CH |
194 | if (lock_flags & XFS_IOLOCK_EXCL) { |
195 | down_write_nested(&VFS_I(ip)->i_rwsem, | |
196 | XFS_IOLOCK_DEP(lock_flags)); | |
197 | } else if (lock_flags & XFS_IOLOCK_SHARED) { | |
198 | down_read_nested(&VFS_I(ip)->i_rwsem, | |
199 | XFS_IOLOCK_DEP(lock_flags)); | |
200 | } | |
fa96acad | 201 | |
653c60b6 DC |
202 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
203 | mrupdate_nested(&ip->i_mmaplock, XFS_MMAPLOCK_DEP(lock_flags)); | |
204 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
205 | mraccess_nested(&ip->i_mmaplock, XFS_MMAPLOCK_DEP(lock_flags)); | |
206 | ||
fa96acad DC |
207 | if (lock_flags & XFS_ILOCK_EXCL) |
208 | mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
209 | else if (lock_flags & XFS_ILOCK_SHARED) | |
210 | mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
211 | } | |
212 | ||
213 | /* | |
214 | * This is just like xfs_ilock(), except that the caller | |
215 | * is guaranteed not to sleep. It returns 1 if it gets | |
216 | * the requested locks and 0 otherwise. If the IO lock is | |
217 | * obtained but the inode lock cannot be, then the IO lock | |
218 | * is dropped before returning. | |
219 | * | |
220 | * ip -- the inode being locked | |
221 | * lock_flags -- this parameter indicates the inode's locks to be | |
222 | * to be locked. See the comment for xfs_ilock() for a list | |
223 | * of valid values. | |
224 | */ | |
225 | int | |
226 | xfs_ilock_nowait( | |
227 | xfs_inode_t *ip, | |
228 | uint lock_flags) | |
229 | { | |
230 | trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_); | |
231 | ||
232 | /* | |
233 | * You can't set both SHARED and EXCL for the same lock, | |
234 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
235 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
236 | */ | |
237 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
238 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
239 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
240 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
241 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
242 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 243 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
244 | |
245 | if (lock_flags & XFS_IOLOCK_EXCL) { | |
65523218 | 246 | if (!down_write_trylock(&VFS_I(ip)->i_rwsem)) |
fa96acad DC |
247 | goto out; |
248 | } else if (lock_flags & XFS_IOLOCK_SHARED) { | |
65523218 | 249 | if (!down_read_trylock(&VFS_I(ip)->i_rwsem)) |
fa96acad DC |
250 | goto out; |
251 | } | |
653c60b6 DC |
252 | |
253 | if (lock_flags & XFS_MMAPLOCK_EXCL) { | |
254 | if (!mrtryupdate(&ip->i_mmaplock)) | |
255 | goto out_undo_iolock; | |
256 | } else if (lock_flags & XFS_MMAPLOCK_SHARED) { | |
257 | if (!mrtryaccess(&ip->i_mmaplock)) | |
258 | goto out_undo_iolock; | |
259 | } | |
260 | ||
fa96acad DC |
261 | if (lock_flags & XFS_ILOCK_EXCL) { |
262 | if (!mrtryupdate(&ip->i_lock)) | |
653c60b6 | 263 | goto out_undo_mmaplock; |
fa96acad DC |
264 | } else if (lock_flags & XFS_ILOCK_SHARED) { |
265 | if (!mrtryaccess(&ip->i_lock)) | |
653c60b6 | 266 | goto out_undo_mmaplock; |
fa96acad DC |
267 | } |
268 | return 1; | |
269 | ||
653c60b6 DC |
270 | out_undo_mmaplock: |
271 | if (lock_flags & XFS_MMAPLOCK_EXCL) | |
272 | mrunlock_excl(&ip->i_mmaplock); | |
273 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
274 | mrunlock_shared(&ip->i_mmaplock); | |
275 | out_undo_iolock: | |
fa96acad | 276 | if (lock_flags & XFS_IOLOCK_EXCL) |
65523218 | 277 | up_write(&VFS_I(ip)->i_rwsem); |
fa96acad | 278 | else if (lock_flags & XFS_IOLOCK_SHARED) |
65523218 | 279 | up_read(&VFS_I(ip)->i_rwsem); |
653c60b6 | 280 | out: |
fa96acad DC |
281 | return 0; |
282 | } | |
283 | ||
284 | /* | |
285 | * xfs_iunlock() is used to drop the inode locks acquired with | |
286 | * xfs_ilock() and xfs_ilock_nowait(). The caller must pass | |
287 | * in the flags given to xfs_ilock() or xfs_ilock_nowait() so | |
288 | * that we know which locks to drop. | |
289 | * | |
290 | * ip -- the inode being unlocked | |
291 | * lock_flags -- this parameter indicates the inode's locks to be | |
292 | * to be unlocked. See the comment for xfs_ilock() for a list | |
293 | * of valid values for this parameter. | |
294 | * | |
295 | */ | |
296 | void | |
297 | xfs_iunlock( | |
298 | xfs_inode_t *ip, | |
299 | uint lock_flags) | |
300 | { | |
301 | /* | |
302 | * You can't set both SHARED and EXCL for the same lock, | |
303 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
304 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
305 | */ | |
306 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
307 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
308 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
309 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
310 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
311 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 312 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
313 | ASSERT(lock_flags != 0); |
314 | ||
315 | if (lock_flags & XFS_IOLOCK_EXCL) | |
65523218 | 316 | up_write(&VFS_I(ip)->i_rwsem); |
fa96acad | 317 | else if (lock_flags & XFS_IOLOCK_SHARED) |
65523218 | 318 | up_read(&VFS_I(ip)->i_rwsem); |
fa96acad | 319 | |
653c60b6 DC |
320 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
321 | mrunlock_excl(&ip->i_mmaplock); | |
322 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
323 | mrunlock_shared(&ip->i_mmaplock); | |
324 | ||
fa96acad DC |
325 | if (lock_flags & XFS_ILOCK_EXCL) |
326 | mrunlock_excl(&ip->i_lock); | |
327 | else if (lock_flags & XFS_ILOCK_SHARED) | |
328 | mrunlock_shared(&ip->i_lock); | |
329 | ||
330 | trace_xfs_iunlock(ip, lock_flags, _RET_IP_); | |
331 | } | |
332 | ||
333 | /* | |
334 | * give up write locks. the i/o lock cannot be held nested | |
335 | * if it is being demoted. | |
336 | */ | |
337 | void | |
338 | xfs_ilock_demote( | |
339 | xfs_inode_t *ip, | |
340 | uint lock_flags) | |
341 | { | |
653c60b6 DC |
342 | ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_MMAPLOCK_EXCL|XFS_ILOCK_EXCL)); |
343 | ASSERT((lock_flags & | |
344 | ~(XFS_IOLOCK_EXCL|XFS_MMAPLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); | |
fa96acad DC |
345 | |
346 | if (lock_flags & XFS_ILOCK_EXCL) | |
347 | mrdemote(&ip->i_lock); | |
653c60b6 DC |
348 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
349 | mrdemote(&ip->i_mmaplock); | |
fa96acad | 350 | if (lock_flags & XFS_IOLOCK_EXCL) |
65523218 | 351 | downgrade_write(&VFS_I(ip)->i_rwsem); |
fa96acad DC |
352 | |
353 | trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_); | |
354 | } | |
355 | ||
742ae1e3 | 356 | #if defined(DEBUG) || defined(XFS_WARN) |
fa96acad DC |
357 | int |
358 | xfs_isilocked( | |
359 | xfs_inode_t *ip, | |
360 | uint lock_flags) | |
361 | { | |
362 | if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { | |
363 | if (!(lock_flags & XFS_ILOCK_SHARED)) | |
364 | return !!ip->i_lock.mr_writer; | |
365 | return rwsem_is_locked(&ip->i_lock.mr_lock); | |
366 | } | |
367 | ||
653c60b6 DC |
368 | if (lock_flags & (XFS_MMAPLOCK_EXCL|XFS_MMAPLOCK_SHARED)) { |
369 | if (!(lock_flags & XFS_MMAPLOCK_SHARED)) | |
370 | return !!ip->i_mmaplock.mr_writer; | |
371 | return rwsem_is_locked(&ip->i_mmaplock.mr_lock); | |
372 | } | |
373 | ||
fa96acad DC |
374 | if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { |
375 | if (!(lock_flags & XFS_IOLOCK_SHARED)) | |
65523218 CH |
376 | return !debug_locks || |
377 | lockdep_is_held_type(&VFS_I(ip)->i_rwsem, 0); | |
378 | return rwsem_is_locked(&VFS_I(ip)->i_rwsem); | |
fa96acad DC |
379 | } |
380 | ||
381 | ASSERT(0); | |
382 | return 0; | |
383 | } | |
384 | #endif | |
385 | ||
c24b5dfa DC |
386 | #ifdef DEBUG |
387 | int xfs_locked_n; | |
388 | int xfs_small_retries; | |
389 | int xfs_middle_retries; | |
390 | int xfs_lots_retries; | |
391 | int xfs_lock_delays; | |
392 | #endif | |
393 | ||
b6a9947e DC |
394 | /* |
395 | * xfs_lockdep_subclass_ok() is only used in an ASSERT, so is only called when | |
396 | * DEBUG or XFS_WARN is set. And MAX_LOCKDEP_SUBCLASSES is then only defined | |
397 | * when CONFIG_LOCKDEP is set. Hence the complex define below to avoid build | |
398 | * errors and warnings. | |
399 | */ | |
400 | #if (defined(DEBUG) || defined(XFS_WARN)) && defined(CONFIG_LOCKDEP) | |
3403ccc0 DC |
401 | static bool |
402 | xfs_lockdep_subclass_ok( | |
403 | int subclass) | |
404 | { | |
405 | return subclass < MAX_LOCKDEP_SUBCLASSES; | |
406 | } | |
407 | #else | |
408 | #define xfs_lockdep_subclass_ok(subclass) (true) | |
409 | #endif | |
410 | ||
c24b5dfa | 411 | /* |
653c60b6 | 412 | * Bump the subclass so xfs_lock_inodes() acquires each lock with a different |
0952c818 DC |
413 | * value. This can be called for any type of inode lock combination, including |
414 | * parent locking. Care must be taken to ensure we don't overrun the subclass | |
415 | * storage fields in the class mask we build. | |
c24b5dfa DC |
416 | */ |
417 | static inline int | |
418 | xfs_lock_inumorder(int lock_mode, int subclass) | |
419 | { | |
0952c818 DC |
420 | int class = 0; |
421 | ||
422 | ASSERT(!(lock_mode & (XFS_ILOCK_PARENT | XFS_ILOCK_RTBITMAP | | |
423 | XFS_ILOCK_RTSUM))); | |
3403ccc0 | 424 | ASSERT(xfs_lockdep_subclass_ok(subclass)); |
0952c818 | 425 | |
653c60b6 | 426 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) { |
0952c818 | 427 | ASSERT(subclass <= XFS_IOLOCK_MAX_SUBCLASS); |
0952c818 | 428 | class += subclass << XFS_IOLOCK_SHIFT; |
653c60b6 DC |
429 | } |
430 | ||
431 | if (lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) { | |
0952c818 DC |
432 | ASSERT(subclass <= XFS_MMAPLOCK_MAX_SUBCLASS); |
433 | class += subclass << XFS_MMAPLOCK_SHIFT; | |
653c60b6 DC |
434 | } |
435 | ||
0952c818 DC |
436 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) { |
437 | ASSERT(subclass <= XFS_ILOCK_MAX_SUBCLASS); | |
438 | class += subclass << XFS_ILOCK_SHIFT; | |
439 | } | |
c24b5dfa | 440 | |
0952c818 | 441 | return (lock_mode & ~XFS_LOCK_SUBCLASS_MASK) | class; |
c24b5dfa DC |
442 | } |
443 | ||
444 | /* | |
95afcf5c DC |
445 | * The following routine will lock n inodes in exclusive mode. We assume the |
446 | * caller calls us with the inodes in i_ino order. | |
c24b5dfa | 447 | * |
95afcf5c DC |
448 | * We need to detect deadlock where an inode that we lock is in the AIL and we |
449 | * start waiting for another inode that is locked by a thread in a long running | |
450 | * transaction (such as truncate). This can result in deadlock since the long | |
451 | * running trans might need to wait for the inode we just locked in order to | |
452 | * push the tail and free space in the log. | |
0952c818 DC |
453 | * |
454 | * xfs_lock_inodes() can only be used to lock one type of lock at a time - | |
455 | * the iolock, the mmaplock or the ilock, but not more than one at a time. If we | |
456 | * lock more than one at a time, lockdep will report false positives saying we | |
457 | * have violated locking orders. | |
c24b5dfa | 458 | */ |
0d5a75e9 | 459 | static void |
c24b5dfa DC |
460 | xfs_lock_inodes( |
461 | xfs_inode_t **ips, | |
462 | int inodes, | |
463 | uint lock_mode) | |
464 | { | |
465 | int attempts = 0, i, j, try_lock; | |
466 | xfs_log_item_t *lp; | |
467 | ||
0952c818 DC |
468 | /* |
469 | * Currently supports between 2 and 5 inodes with exclusive locking. We | |
470 | * support an arbitrary depth of locking here, but absolute limits on | |
471 | * inodes depend on the the type of locking and the limits placed by | |
472 | * lockdep annotations in xfs_lock_inumorder. These are all checked by | |
473 | * the asserts. | |
474 | */ | |
95afcf5c | 475 | ASSERT(ips && inodes >= 2 && inodes <= 5); |
0952c818 DC |
476 | ASSERT(lock_mode & (XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL | |
477 | XFS_ILOCK_EXCL)); | |
478 | ASSERT(!(lock_mode & (XFS_IOLOCK_SHARED | XFS_MMAPLOCK_SHARED | | |
479 | XFS_ILOCK_SHARED))); | |
0952c818 DC |
480 | ASSERT(!(lock_mode & XFS_MMAPLOCK_EXCL) || |
481 | inodes <= XFS_MMAPLOCK_MAX_SUBCLASS + 1); | |
482 | ASSERT(!(lock_mode & XFS_ILOCK_EXCL) || | |
483 | inodes <= XFS_ILOCK_MAX_SUBCLASS + 1); | |
484 | ||
485 | if (lock_mode & XFS_IOLOCK_EXCL) { | |
486 | ASSERT(!(lock_mode & (XFS_MMAPLOCK_EXCL | XFS_ILOCK_EXCL))); | |
487 | } else if (lock_mode & XFS_MMAPLOCK_EXCL) | |
488 | ASSERT(!(lock_mode & XFS_ILOCK_EXCL)); | |
c24b5dfa DC |
489 | |
490 | try_lock = 0; | |
491 | i = 0; | |
c24b5dfa DC |
492 | again: |
493 | for (; i < inodes; i++) { | |
494 | ASSERT(ips[i]); | |
495 | ||
95afcf5c | 496 | if (i && (ips[i] == ips[i - 1])) /* Already locked */ |
c24b5dfa DC |
497 | continue; |
498 | ||
499 | /* | |
95afcf5c DC |
500 | * If try_lock is not set yet, make sure all locked inodes are |
501 | * not in the AIL. If any are, set try_lock to be used later. | |
c24b5dfa | 502 | */ |
c24b5dfa DC |
503 | if (!try_lock) { |
504 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
505 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
95afcf5c | 506 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) |
c24b5dfa | 507 | try_lock++; |
c24b5dfa DC |
508 | } |
509 | } | |
510 | ||
511 | /* | |
512 | * If any of the previous locks we have locked is in the AIL, | |
513 | * we must TRY to get the second and subsequent locks. If | |
514 | * we can't get any, we must release all we have | |
515 | * and try again. | |
516 | */ | |
95afcf5c DC |
517 | if (!try_lock) { |
518 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); | |
519 | continue; | |
520 | } | |
521 | ||
522 | /* try_lock means we have an inode locked that is in the AIL. */ | |
523 | ASSERT(i != 0); | |
524 | if (xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) | |
525 | continue; | |
c24b5dfa | 526 | |
95afcf5c DC |
527 | /* |
528 | * Unlock all previous guys and try again. xfs_iunlock will try | |
529 | * to push the tail if the inode is in the AIL. | |
530 | */ | |
531 | attempts++; | |
532 | for (j = i - 1; j >= 0; j--) { | |
c24b5dfa | 533 | /* |
95afcf5c DC |
534 | * Check to see if we've already unlocked this one. Not |
535 | * the first one going back, and the inode ptr is the | |
536 | * same. | |
c24b5dfa | 537 | */ |
95afcf5c DC |
538 | if (j != (i - 1) && ips[j] == ips[j + 1]) |
539 | continue; | |
c24b5dfa | 540 | |
95afcf5c DC |
541 | xfs_iunlock(ips[j], lock_mode); |
542 | } | |
c24b5dfa | 543 | |
95afcf5c DC |
544 | if ((attempts % 5) == 0) { |
545 | delay(1); /* Don't just spin the CPU */ | |
c24b5dfa | 546 | #ifdef DEBUG |
95afcf5c | 547 | xfs_lock_delays++; |
c24b5dfa | 548 | #endif |
c24b5dfa | 549 | } |
95afcf5c DC |
550 | i = 0; |
551 | try_lock = 0; | |
552 | goto again; | |
c24b5dfa DC |
553 | } |
554 | ||
555 | #ifdef DEBUG | |
556 | if (attempts) { | |
557 | if (attempts < 5) xfs_small_retries++; | |
558 | else if (attempts < 100) xfs_middle_retries++; | |
559 | else xfs_lots_retries++; | |
560 | } else { | |
561 | xfs_locked_n++; | |
562 | } | |
563 | #endif | |
564 | } | |
565 | ||
566 | /* | |
653c60b6 DC |
567 | * xfs_lock_two_inodes() can only be used to lock one type of lock at a time - |
568 | * the iolock, the mmaplock or the ilock, but not more than one at a time. If we | |
569 | * lock more than one at a time, lockdep will report false positives saying we | |
570 | * have violated locking orders. | |
c24b5dfa DC |
571 | */ |
572 | void | |
573 | xfs_lock_two_inodes( | |
574 | xfs_inode_t *ip0, | |
575 | xfs_inode_t *ip1, | |
576 | uint lock_mode) | |
577 | { | |
578 | xfs_inode_t *temp; | |
579 | int attempts = 0; | |
580 | xfs_log_item_t *lp; | |
581 | ||
65523218 CH |
582 | ASSERT(!(lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))); |
583 | if (lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) | |
653c60b6 DC |
584 | ASSERT(!(lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); |
585 | ||
c24b5dfa DC |
586 | ASSERT(ip0->i_ino != ip1->i_ino); |
587 | ||
588 | if (ip0->i_ino > ip1->i_ino) { | |
589 | temp = ip0; | |
590 | ip0 = ip1; | |
591 | ip1 = temp; | |
592 | } | |
593 | ||
594 | again: | |
595 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
596 | ||
597 | /* | |
598 | * If the first lock we have locked is in the AIL, we must TRY to get | |
599 | * the second lock. If we can't get it, we must release the first one | |
600 | * and try again. | |
601 | */ | |
602 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
603 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
604 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
605 | xfs_iunlock(ip0, lock_mode); | |
606 | if ((++attempts % 5) == 0) | |
607 | delay(1); /* Don't just spin the CPU */ | |
608 | goto again; | |
609 | } | |
610 | } else { | |
611 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
612 | } | |
613 | } | |
614 | ||
615 | ||
fa96acad DC |
616 | void |
617 | __xfs_iflock( | |
618 | struct xfs_inode *ip) | |
619 | { | |
620 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT); | |
621 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT); | |
622 | ||
623 | do { | |
624 | prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
625 | if (xfs_isiflocked(ip)) | |
626 | io_schedule(); | |
627 | } while (!xfs_iflock_nowait(ip)); | |
628 | ||
629 | finish_wait(wq, &wait.wait); | |
630 | } | |
631 | ||
1da177e4 LT |
632 | STATIC uint |
633 | _xfs_dic2xflags( | |
58f88ca2 DC |
634 | __uint16_t di_flags, |
635 | uint64_t di_flags2, | |
636 | bool has_attr) | |
1da177e4 LT |
637 | { |
638 | uint flags = 0; | |
639 | ||
640 | if (di_flags & XFS_DIFLAG_ANY) { | |
641 | if (di_flags & XFS_DIFLAG_REALTIME) | |
e7b89481 | 642 | flags |= FS_XFLAG_REALTIME; |
1da177e4 | 643 | if (di_flags & XFS_DIFLAG_PREALLOC) |
e7b89481 | 644 | flags |= FS_XFLAG_PREALLOC; |
1da177e4 | 645 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
e7b89481 | 646 | flags |= FS_XFLAG_IMMUTABLE; |
1da177e4 | 647 | if (di_flags & XFS_DIFLAG_APPEND) |
e7b89481 | 648 | flags |= FS_XFLAG_APPEND; |
1da177e4 | 649 | if (di_flags & XFS_DIFLAG_SYNC) |
e7b89481 | 650 | flags |= FS_XFLAG_SYNC; |
1da177e4 | 651 | if (di_flags & XFS_DIFLAG_NOATIME) |
e7b89481 | 652 | flags |= FS_XFLAG_NOATIME; |
1da177e4 | 653 | if (di_flags & XFS_DIFLAG_NODUMP) |
e7b89481 | 654 | flags |= FS_XFLAG_NODUMP; |
1da177e4 | 655 | if (di_flags & XFS_DIFLAG_RTINHERIT) |
e7b89481 | 656 | flags |= FS_XFLAG_RTINHERIT; |
1da177e4 | 657 | if (di_flags & XFS_DIFLAG_PROJINHERIT) |
e7b89481 | 658 | flags |= FS_XFLAG_PROJINHERIT; |
1da177e4 | 659 | if (di_flags & XFS_DIFLAG_NOSYMLINKS) |
e7b89481 | 660 | flags |= FS_XFLAG_NOSYMLINKS; |
dd9f438e | 661 | if (di_flags & XFS_DIFLAG_EXTSIZE) |
e7b89481 | 662 | flags |= FS_XFLAG_EXTSIZE; |
dd9f438e | 663 | if (di_flags & XFS_DIFLAG_EXTSZINHERIT) |
e7b89481 | 664 | flags |= FS_XFLAG_EXTSZINHERIT; |
d3446eac | 665 | if (di_flags & XFS_DIFLAG_NODEFRAG) |
e7b89481 | 666 | flags |= FS_XFLAG_NODEFRAG; |
2a82b8be | 667 | if (di_flags & XFS_DIFLAG_FILESTREAM) |
e7b89481 | 668 | flags |= FS_XFLAG_FILESTREAM; |
1da177e4 LT |
669 | } |
670 | ||
58f88ca2 DC |
671 | if (di_flags2 & XFS_DIFLAG2_ANY) { |
672 | if (di_flags2 & XFS_DIFLAG2_DAX) | |
673 | flags |= FS_XFLAG_DAX; | |
f7ca3522 DW |
674 | if (di_flags2 & XFS_DIFLAG2_COWEXTSIZE) |
675 | flags |= FS_XFLAG_COWEXTSIZE; | |
58f88ca2 DC |
676 | } |
677 | ||
678 | if (has_attr) | |
679 | flags |= FS_XFLAG_HASATTR; | |
680 | ||
1da177e4 LT |
681 | return flags; |
682 | } | |
683 | ||
684 | uint | |
685 | xfs_ip2xflags( | |
58f88ca2 | 686 | struct xfs_inode *ip) |
1da177e4 | 687 | { |
58f88ca2 | 688 | struct xfs_icdinode *dic = &ip->i_d; |
1da177e4 | 689 | |
58f88ca2 | 690 | return _xfs_dic2xflags(dic->di_flags, dic->di_flags2, XFS_IFORK_Q(ip)); |
1da177e4 LT |
691 | } |
692 | ||
c24b5dfa DC |
693 | /* |
694 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
695 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
696 | * ci_name->name will point to a the actual name (caller must free) or | |
697 | * will be set to NULL if an exact match is found. | |
698 | */ | |
699 | int | |
700 | xfs_lookup( | |
701 | xfs_inode_t *dp, | |
702 | struct xfs_name *name, | |
703 | xfs_inode_t **ipp, | |
704 | struct xfs_name *ci_name) | |
705 | { | |
706 | xfs_ino_t inum; | |
707 | int error; | |
c24b5dfa DC |
708 | |
709 | trace_xfs_lookup(dp, name); | |
710 | ||
711 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
2451337d | 712 | return -EIO; |
c24b5dfa | 713 | |
c24b5dfa | 714 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
c24b5dfa | 715 | if (error) |
dbad7c99 | 716 | goto out_unlock; |
c24b5dfa DC |
717 | |
718 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); | |
719 | if (error) | |
720 | goto out_free_name; | |
721 | ||
722 | return 0; | |
723 | ||
724 | out_free_name: | |
725 | if (ci_name) | |
726 | kmem_free(ci_name->name); | |
dbad7c99 | 727 | out_unlock: |
c24b5dfa DC |
728 | *ipp = NULL; |
729 | return error; | |
730 | } | |
731 | ||
1da177e4 LT |
732 | /* |
733 | * Allocate an inode on disk and return a copy of its in-core version. | |
734 | * The in-core inode is locked exclusively. Set mode, nlink, and rdev | |
735 | * appropriately within the inode. The uid and gid for the inode are | |
736 | * set according to the contents of the given cred structure. | |
737 | * | |
738 | * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() | |
cd856db6 CM |
739 | * has a free inode available, call xfs_iget() to obtain the in-core |
740 | * version of the allocated inode. Finally, fill in the inode and | |
741 | * log its initial contents. In this case, ialloc_context would be | |
742 | * set to NULL. | |
1da177e4 | 743 | * |
cd856db6 CM |
744 | * If xfs_dialloc() does not have an available inode, it will replenish |
745 | * its supply by doing an allocation. Since we can only do one | |
746 | * allocation within a transaction without deadlocks, we must commit | |
747 | * the current transaction before returning the inode itself. | |
748 | * In this case, therefore, we will set ialloc_context and return. | |
1da177e4 LT |
749 | * The caller should then commit the current transaction, start a new |
750 | * transaction, and call xfs_ialloc() again to actually get the inode. | |
751 | * | |
752 | * To ensure that some other process does not grab the inode that | |
753 | * was allocated during the first call to xfs_ialloc(), this routine | |
754 | * also returns the [locked] bp pointing to the head of the freelist | |
755 | * as ialloc_context. The caller should hold this buffer across | |
756 | * the commit and pass it back into this routine on the second call. | |
b11f94d5 DC |
757 | * |
758 | * If we are allocating quota inodes, we do not have a parent inode | |
759 | * to attach to or associate with (i.e. pip == NULL) because they | |
760 | * are not linked into the directory structure - they are attached | |
761 | * directly to the superblock - and so have no parent. | |
1da177e4 | 762 | */ |
0d5a75e9 | 763 | static int |
1da177e4 LT |
764 | xfs_ialloc( |
765 | xfs_trans_t *tp, | |
766 | xfs_inode_t *pip, | |
576b1d67 | 767 | umode_t mode, |
31b084ae | 768 | xfs_nlink_t nlink, |
1da177e4 | 769 | xfs_dev_t rdev, |
6743099c | 770 | prid_t prid, |
1da177e4 LT |
771 | int okalloc, |
772 | xfs_buf_t **ialloc_context, | |
1da177e4 LT |
773 | xfs_inode_t **ipp) |
774 | { | |
93848a99 | 775 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 LT |
776 | xfs_ino_t ino; |
777 | xfs_inode_t *ip; | |
1da177e4 LT |
778 | uint flags; |
779 | int error; | |
e076b0f3 | 780 | struct timespec tv; |
3987848c | 781 | struct inode *inode; |
1da177e4 LT |
782 | |
783 | /* | |
784 | * Call the space management code to pick | |
785 | * the on-disk inode to be allocated. | |
786 | */ | |
b11f94d5 | 787 | error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc, |
08358906 | 788 | ialloc_context, &ino); |
bf904248 | 789 | if (error) |
1da177e4 | 790 | return error; |
08358906 | 791 | if (*ialloc_context || ino == NULLFSINO) { |
1da177e4 LT |
792 | *ipp = NULL; |
793 | return 0; | |
794 | } | |
795 | ASSERT(*ialloc_context == NULL); | |
796 | ||
797 | /* | |
798 | * Get the in-core inode with the lock held exclusively. | |
799 | * This is because we're setting fields here we need | |
800 | * to prevent others from looking at until we're done. | |
801 | */ | |
93848a99 | 802 | error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE, |
ec3ba85f | 803 | XFS_ILOCK_EXCL, &ip); |
bf904248 | 804 | if (error) |
1da177e4 | 805 | return error; |
1da177e4 | 806 | ASSERT(ip != NULL); |
3987848c | 807 | inode = VFS_I(ip); |
1da177e4 | 808 | |
263997a6 DC |
809 | /* |
810 | * We always convert v1 inodes to v2 now - we only support filesystems | |
811 | * with >= v2 inode capability, so there is no reason for ever leaving | |
812 | * an inode in v1 format. | |
813 | */ | |
814 | if (ip->i_d.di_version == 1) | |
815 | ip->i_d.di_version = 2; | |
816 | ||
c19b3b05 | 817 | inode->i_mode = mode; |
54d7b5c1 | 818 | set_nlink(inode, nlink); |
7aab1b28 DE |
819 | ip->i_d.di_uid = xfs_kuid_to_uid(current_fsuid()); |
820 | ip->i_d.di_gid = xfs_kgid_to_gid(current_fsgid()); | |
6743099c | 821 | xfs_set_projid(ip, prid); |
1da177e4 | 822 | |
bd186aa9 | 823 | if (pip && XFS_INHERIT_GID(pip)) { |
1da177e4 | 824 | ip->i_d.di_gid = pip->i_d.di_gid; |
c19b3b05 DC |
825 | if ((VFS_I(pip)->i_mode & S_ISGID) && S_ISDIR(mode)) |
826 | inode->i_mode |= S_ISGID; | |
1da177e4 LT |
827 | } |
828 | ||
829 | /* | |
830 | * If the group ID of the new file does not match the effective group | |
831 | * ID or one of the supplementary group IDs, the S_ISGID bit is cleared | |
832 | * (and only if the irix_sgid_inherit compatibility variable is set). | |
833 | */ | |
834 | if ((irix_sgid_inherit) && | |
c19b3b05 DC |
835 | (inode->i_mode & S_ISGID) && |
836 | (!in_group_p(xfs_gid_to_kgid(ip->i_d.di_gid)))) | |
837 | inode->i_mode &= ~S_ISGID; | |
1da177e4 LT |
838 | |
839 | ip->i_d.di_size = 0; | |
840 | ip->i_d.di_nextents = 0; | |
841 | ASSERT(ip->i_d.di_nblocks == 0); | |
dff35fd4 | 842 | |
c2050a45 | 843 | tv = current_time(inode); |
3987848c DC |
844 | inode->i_mtime = tv; |
845 | inode->i_atime = tv; | |
846 | inode->i_ctime = tv; | |
dff35fd4 | 847 | |
1da177e4 LT |
848 | ip->i_d.di_extsize = 0; |
849 | ip->i_d.di_dmevmask = 0; | |
850 | ip->i_d.di_dmstate = 0; | |
851 | ip->i_d.di_flags = 0; | |
93848a99 CH |
852 | |
853 | if (ip->i_d.di_version == 3) { | |
83e06f21 | 854 | inode->i_version = 1; |
93848a99 | 855 | ip->i_d.di_flags2 = 0; |
f7ca3522 | 856 | ip->i_d.di_cowextsize = 0; |
3987848c DC |
857 | ip->i_d.di_crtime.t_sec = (__int32_t)tv.tv_sec; |
858 | ip->i_d.di_crtime.t_nsec = (__int32_t)tv.tv_nsec; | |
93848a99 CH |
859 | } |
860 | ||
861 | ||
1da177e4 LT |
862 | flags = XFS_ILOG_CORE; |
863 | switch (mode & S_IFMT) { | |
864 | case S_IFIFO: | |
865 | case S_IFCHR: | |
866 | case S_IFBLK: | |
867 | case S_IFSOCK: | |
868 | ip->i_d.di_format = XFS_DINODE_FMT_DEV; | |
869 | ip->i_df.if_u2.if_rdev = rdev; | |
870 | ip->i_df.if_flags = 0; | |
871 | flags |= XFS_ILOG_DEV; | |
872 | break; | |
873 | case S_IFREG: | |
874 | case S_IFDIR: | |
b11f94d5 | 875 | if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) { |
58f88ca2 DC |
876 | uint64_t di_flags2 = 0; |
877 | uint di_flags = 0; | |
365ca83d | 878 | |
abbede1b | 879 | if (S_ISDIR(mode)) { |
365ca83d NS |
880 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
881 | di_flags |= XFS_DIFLAG_RTINHERIT; | |
dd9f438e NS |
882 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
883 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; | |
884 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
885 | } | |
9336e3a7 DC |
886 | if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
887 | di_flags |= XFS_DIFLAG_PROJINHERIT; | |
abbede1b | 888 | } else if (S_ISREG(mode)) { |
613d7043 | 889 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
365ca83d | 890 | di_flags |= XFS_DIFLAG_REALTIME; |
dd9f438e NS |
891 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
892 | di_flags |= XFS_DIFLAG_EXTSIZE; | |
893 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
894 | } | |
1da177e4 LT |
895 | } |
896 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) && | |
897 | xfs_inherit_noatime) | |
365ca83d | 898 | di_flags |= XFS_DIFLAG_NOATIME; |
1da177e4 LT |
899 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) && |
900 | xfs_inherit_nodump) | |
365ca83d | 901 | di_flags |= XFS_DIFLAG_NODUMP; |
1da177e4 LT |
902 | if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) && |
903 | xfs_inherit_sync) | |
365ca83d | 904 | di_flags |= XFS_DIFLAG_SYNC; |
1da177e4 LT |
905 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) && |
906 | xfs_inherit_nosymlinks) | |
365ca83d | 907 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
d3446eac BN |
908 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) && |
909 | xfs_inherit_nodefrag) | |
910 | di_flags |= XFS_DIFLAG_NODEFRAG; | |
2a82b8be DC |
911 | if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM) |
912 | di_flags |= XFS_DIFLAG_FILESTREAM; | |
58f88ca2 DC |
913 | if (pip->i_d.di_flags2 & XFS_DIFLAG2_DAX) |
914 | di_flags2 |= XFS_DIFLAG2_DAX; | |
915 | ||
365ca83d | 916 | ip->i_d.di_flags |= di_flags; |
58f88ca2 | 917 | ip->i_d.di_flags2 |= di_flags2; |
1da177e4 | 918 | } |
f7ca3522 DW |
919 | if (pip && |
920 | (pip->i_d.di_flags2 & XFS_DIFLAG2_ANY) && | |
921 | pip->i_d.di_version == 3 && | |
922 | ip->i_d.di_version == 3) { | |
923 | if (pip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE) { | |
924 | ip->i_d.di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; | |
925 | ip->i_d.di_cowextsize = pip->i_d.di_cowextsize; | |
926 | } | |
927 | } | |
1da177e4 LT |
928 | /* FALLTHROUGH */ |
929 | case S_IFLNK: | |
930 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; | |
931 | ip->i_df.if_flags = XFS_IFEXTENTS; | |
932 | ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0; | |
933 | ip->i_df.if_u1.if_extents = NULL; | |
934 | break; | |
935 | default: | |
936 | ASSERT(0); | |
937 | } | |
938 | /* | |
939 | * Attribute fork settings for new inode. | |
940 | */ | |
941 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
942 | ip->i_d.di_anextents = 0; | |
943 | ||
944 | /* | |
945 | * Log the new values stuffed into the inode. | |
946 | */ | |
ddc3415a | 947 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
948 | xfs_trans_log_inode(tp, ip, flags); |
949 | ||
58c90473 | 950 | /* now that we have an i_mode we can setup the inode structure */ |
41be8bed | 951 | xfs_setup_inode(ip); |
1da177e4 LT |
952 | |
953 | *ipp = ip; | |
954 | return 0; | |
955 | } | |
956 | ||
e546cb79 DC |
957 | /* |
958 | * Allocates a new inode from disk and return a pointer to the | |
959 | * incore copy. This routine will internally commit the current | |
960 | * transaction and allocate a new one if the Space Manager needed | |
961 | * to do an allocation to replenish the inode free-list. | |
962 | * | |
963 | * This routine is designed to be called from xfs_create and | |
964 | * xfs_create_dir. | |
965 | * | |
966 | */ | |
967 | int | |
968 | xfs_dir_ialloc( | |
969 | xfs_trans_t **tpp, /* input: current transaction; | |
970 | output: may be a new transaction. */ | |
971 | xfs_inode_t *dp, /* directory within whose allocate | |
972 | the inode. */ | |
973 | umode_t mode, | |
974 | xfs_nlink_t nlink, | |
975 | xfs_dev_t rdev, | |
976 | prid_t prid, /* project id */ | |
977 | int okalloc, /* ok to allocate new space */ | |
978 | xfs_inode_t **ipp, /* pointer to inode; it will be | |
979 | locked. */ | |
980 | int *committed) | |
981 | ||
982 | { | |
983 | xfs_trans_t *tp; | |
e546cb79 DC |
984 | xfs_inode_t *ip; |
985 | xfs_buf_t *ialloc_context = NULL; | |
986 | int code; | |
e546cb79 DC |
987 | void *dqinfo; |
988 | uint tflags; | |
989 | ||
990 | tp = *tpp; | |
991 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
992 | ||
993 | /* | |
994 | * xfs_ialloc will return a pointer to an incore inode if | |
995 | * the Space Manager has an available inode on the free | |
996 | * list. Otherwise, it will do an allocation and replenish | |
997 | * the freelist. Since we can only do one allocation per | |
998 | * transaction without deadlocks, we will need to commit the | |
999 | * current transaction and start a new one. We will then | |
1000 | * need to call xfs_ialloc again to get the inode. | |
1001 | * | |
1002 | * If xfs_ialloc did an allocation to replenish the freelist, | |
1003 | * it returns the bp containing the head of the freelist as | |
1004 | * ialloc_context. We will hold a lock on it across the | |
1005 | * transaction commit so that no other process can steal | |
1006 | * the inode(s) that we've just allocated. | |
1007 | */ | |
1008 | code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, okalloc, | |
1009 | &ialloc_context, &ip); | |
1010 | ||
1011 | /* | |
1012 | * Return an error if we were unable to allocate a new inode. | |
1013 | * This should only happen if we run out of space on disk or | |
1014 | * encounter a disk error. | |
1015 | */ | |
1016 | if (code) { | |
1017 | *ipp = NULL; | |
1018 | return code; | |
1019 | } | |
1020 | if (!ialloc_context && !ip) { | |
1021 | *ipp = NULL; | |
2451337d | 1022 | return -ENOSPC; |
e546cb79 DC |
1023 | } |
1024 | ||
1025 | /* | |
1026 | * If the AGI buffer is non-NULL, then we were unable to get an | |
1027 | * inode in one operation. We need to commit the current | |
1028 | * transaction and call xfs_ialloc() again. It is guaranteed | |
1029 | * to succeed the second time. | |
1030 | */ | |
1031 | if (ialloc_context) { | |
1032 | /* | |
1033 | * Normally, xfs_trans_commit releases all the locks. | |
1034 | * We call bhold to hang on to the ialloc_context across | |
1035 | * the commit. Holding this buffer prevents any other | |
1036 | * processes from doing any allocations in this | |
1037 | * allocation group. | |
1038 | */ | |
1039 | xfs_trans_bhold(tp, ialloc_context); | |
e546cb79 DC |
1040 | |
1041 | /* | |
1042 | * We want the quota changes to be associated with the next | |
1043 | * transaction, NOT this one. So, detach the dqinfo from this | |
1044 | * and attach it to the next transaction. | |
1045 | */ | |
1046 | dqinfo = NULL; | |
1047 | tflags = 0; | |
1048 | if (tp->t_dqinfo) { | |
1049 | dqinfo = (void *)tp->t_dqinfo; | |
1050 | tp->t_dqinfo = NULL; | |
1051 | tflags = tp->t_flags & XFS_TRANS_DQ_DIRTY; | |
1052 | tp->t_flags &= ~(XFS_TRANS_DQ_DIRTY); | |
1053 | } | |
1054 | ||
6e3e6d55 | 1055 | code = xfs_trans_roll(&tp, NULL); |
2e6db6c4 | 1056 | if (committed != NULL) |
e546cb79 | 1057 | *committed = 1; |
3d3c8b52 | 1058 | |
e546cb79 DC |
1059 | /* |
1060 | * Re-attach the quota info that we detached from prev trx. | |
1061 | */ | |
1062 | if (dqinfo) { | |
1063 | tp->t_dqinfo = dqinfo; | |
1064 | tp->t_flags |= tflags; | |
1065 | } | |
1066 | ||
1067 | if (code) { | |
1068 | xfs_buf_relse(ialloc_context); | |
2e6db6c4 | 1069 | *tpp = tp; |
e546cb79 DC |
1070 | *ipp = NULL; |
1071 | return code; | |
1072 | } | |
1073 | xfs_trans_bjoin(tp, ialloc_context); | |
1074 | ||
1075 | /* | |
1076 | * Call ialloc again. Since we've locked out all | |
1077 | * other allocations in this allocation group, | |
1078 | * this call should always succeed. | |
1079 | */ | |
1080 | code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, | |
1081 | okalloc, &ialloc_context, &ip); | |
1082 | ||
1083 | /* | |
1084 | * If we get an error at this point, return to the caller | |
1085 | * so that the current transaction can be aborted. | |
1086 | */ | |
1087 | if (code) { | |
1088 | *tpp = tp; | |
1089 | *ipp = NULL; | |
1090 | return code; | |
1091 | } | |
1092 | ASSERT(!ialloc_context && ip); | |
1093 | ||
1094 | } else { | |
1095 | if (committed != NULL) | |
1096 | *committed = 0; | |
1097 | } | |
1098 | ||
1099 | *ipp = ip; | |
1100 | *tpp = tp; | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | /* | |
54d7b5c1 DC |
1106 | * Decrement the link count on an inode & log the change. If this causes the |
1107 | * link count to go to zero, move the inode to AGI unlinked list so that it can | |
1108 | * be freed when the last active reference goes away via xfs_inactive(). | |
e546cb79 | 1109 | */ |
0d5a75e9 | 1110 | static int /* error */ |
e546cb79 DC |
1111 | xfs_droplink( |
1112 | xfs_trans_t *tp, | |
1113 | xfs_inode_t *ip) | |
1114 | { | |
e546cb79 DC |
1115 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
1116 | ||
e546cb79 DC |
1117 | drop_nlink(VFS_I(ip)); |
1118 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1119 | ||
54d7b5c1 DC |
1120 | if (VFS_I(ip)->i_nlink) |
1121 | return 0; | |
1122 | ||
1123 | return xfs_iunlink(tp, ip); | |
e546cb79 DC |
1124 | } |
1125 | ||
e546cb79 DC |
1126 | /* |
1127 | * Increment the link count on an inode & log the change. | |
1128 | */ | |
0d5a75e9 | 1129 | static int |
e546cb79 DC |
1130 | xfs_bumplink( |
1131 | xfs_trans_t *tp, | |
1132 | xfs_inode_t *ip) | |
1133 | { | |
1134 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); | |
1135 | ||
263997a6 | 1136 | ASSERT(ip->i_d.di_version > 1); |
e546cb79 | 1137 | inc_nlink(VFS_I(ip)); |
e546cb79 DC |
1138 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1139 | return 0; | |
1140 | } | |
1141 | ||
c24b5dfa DC |
1142 | int |
1143 | xfs_create( | |
1144 | xfs_inode_t *dp, | |
1145 | struct xfs_name *name, | |
1146 | umode_t mode, | |
1147 | xfs_dev_t rdev, | |
1148 | xfs_inode_t **ipp) | |
1149 | { | |
1150 | int is_dir = S_ISDIR(mode); | |
1151 | struct xfs_mount *mp = dp->i_mount; | |
1152 | struct xfs_inode *ip = NULL; | |
1153 | struct xfs_trans *tp = NULL; | |
1154 | int error; | |
2c3234d1 | 1155 | struct xfs_defer_ops dfops; |
c24b5dfa DC |
1156 | xfs_fsblock_t first_block; |
1157 | bool unlock_dp_on_error = false; | |
c24b5dfa DC |
1158 | prid_t prid; |
1159 | struct xfs_dquot *udqp = NULL; | |
1160 | struct xfs_dquot *gdqp = NULL; | |
1161 | struct xfs_dquot *pdqp = NULL; | |
062647a8 | 1162 | struct xfs_trans_res *tres; |
c24b5dfa | 1163 | uint resblks; |
c24b5dfa DC |
1164 | |
1165 | trace_xfs_create(dp, name); | |
1166 | ||
1167 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1168 | return -EIO; |
c24b5dfa | 1169 | |
163467d3 | 1170 | prid = xfs_get_initial_prid(dp); |
c24b5dfa DC |
1171 | |
1172 | /* | |
1173 | * Make sure that we have allocated dquot(s) on disk. | |
1174 | */ | |
7aab1b28 DE |
1175 | error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()), |
1176 | xfs_kgid_to_gid(current_fsgid()), prid, | |
c24b5dfa DC |
1177 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, |
1178 | &udqp, &gdqp, &pdqp); | |
1179 | if (error) | |
1180 | return error; | |
1181 | ||
1182 | if (is_dir) { | |
1183 | rdev = 0; | |
1184 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
062647a8 | 1185 | tres = &M_RES(mp)->tr_mkdir; |
c24b5dfa DC |
1186 | } else { |
1187 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
062647a8 | 1188 | tres = &M_RES(mp)->tr_create; |
c24b5dfa DC |
1189 | } |
1190 | ||
c24b5dfa DC |
1191 | /* |
1192 | * Initially assume that the file does not exist and | |
1193 | * reserve the resources for that case. If that is not | |
1194 | * the case we'll drop the one we have and get a more | |
1195 | * appropriate transaction later. | |
1196 | */ | |
253f4911 | 1197 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); |
2451337d | 1198 | if (error == -ENOSPC) { |
c24b5dfa DC |
1199 | /* flush outstanding delalloc blocks and retry */ |
1200 | xfs_flush_inodes(mp); | |
253f4911 | 1201 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); |
c24b5dfa | 1202 | } |
2451337d | 1203 | if (error == -ENOSPC) { |
c24b5dfa DC |
1204 | /* No space at all so try a "no-allocation" reservation */ |
1205 | resblks = 0; | |
253f4911 | 1206 | error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp); |
c24b5dfa | 1207 | } |
4906e215 | 1208 | if (error) |
253f4911 | 1209 | goto out_release_inode; |
c24b5dfa | 1210 | |
65523218 | 1211 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
c24b5dfa DC |
1212 | unlock_dp_on_error = true; |
1213 | ||
2c3234d1 | 1214 | xfs_defer_init(&dfops, &first_block); |
c24b5dfa DC |
1215 | |
1216 | /* | |
1217 | * Reserve disk quota and the inode. | |
1218 | */ | |
1219 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, | |
1220 | pdqp, resblks, 1, 0); | |
1221 | if (error) | |
1222 | goto out_trans_cancel; | |
1223 | ||
94f3cad5 ES |
1224 | if (!resblks) { |
1225 | error = xfs_dir_canenter(tp, dp, name); | |
1226 | if (error) | |
1227 | goto out_trans_cancel; | |
1228 | } | |
c24b5dfa DC |
1229 | |
1230 | /* | |
1231 | * A newly created regular or special file just has one directory | |
1232 | * entry pointing to them, but a directory also the "." entry | |
1233 | * pointing to itself. | |
1234 | */ | |
1235 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, | |
f6106efa | 1236 | prid, resblks > 0, &ip, NULL); |
d6077aa3 | 1237 | if (error) |
4906e215 | 1238 | goto out_trans_cancel; |
c24b5dfa DC |
1239 | |
1240 | /* | |
1241 | * Now we join the directory inode to the transaction. We do not do it | |
1242 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1243 | * (and release all the locks). An error from here on will result in | |
1244 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1245 | * error path. | |
1246 | */ | |
65523218 | 1247 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
1248 | unlock_dp_on_error = false; |
1249 | ||
1250 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, | |
2c3234d1 | 1251 | &first_block, &dfops, resblks ? |
c24b5dfa DC |
1252 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
1253 | if (error) { | |
2451337d | 1254 | ASSERT(error != -ENOSPC); |
4906e215 | 1255 | goto out_trans_cancel; |
c24b5dfa DC |
1256 | } |
1257 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1258 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1259 | ||
1260 | if (is_dir) { | |
1261 | error = xfs_dir_init(tp, ip, dp); | |
1262 | if (error) | |
1263 | goto out_bmap_cancel; | |
1264 | ||
1265 | error = xfs_bumplink(tp, dp); | |
1266 | if (error) | |
1267 | goto out_bmap_cancel; | |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * If this is a synchronous mount, make sure that the | |
1272 | * create transaction goes to disk before returning to | |
1273 | * the user. | |
1274 | */ | |
1275 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
1276 | xfs_trans_set_sync(tp); | |
1277 | ||
1278 | /* | |
1279 | * Attach the dquot(s) to the inodes and modify them incore. | |
1280 | * These ids of the inode couldn't have changed since the new | |
1281 | * inode has been locked ever since it was created. | |
1282 | */ | |
1283 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); | |
1284 | ||
2c3234d1 | 1285 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa DC |
1286 | if (error) |
1287 | goto out_bmap_cancel; | |
1288 | ||
70393313 | 1289 | error = xfs_trans_commit(tp); |
c24b5dfa DC |
1290 | if (error) |
1291 | goto out_release_inode; | |
1292 | ||
1293 | xfs_qm_dqrele(udqp); | |
1294 | xfs_qm_dqrele(gdqp); | |
1295 | xfs_qm_dqrele(pdqp); | |
1296 | ||
1297 | *ipp = ip; | |
1298 | return 0; | |
1299 | ||
1300 | out_bmap_cancel: | |
2c3234d1 | 1301 | xfs_defer_cancel(&dfops); |
c24b5dfa | 1302 | out_trans_cancel: |
4906e215 | 1303 | xfs_trans_cancel(tp); |
c24b5dfa DC |
1304 | out_release_inode: |
1305 | /* | |
58c90473 DC |
1306 | * Wait until after the current transaction is aborted to finish the |
1307 | * setup of the inode and release the inode. This prevents recursive | |
1308 | * transactions and deadlocks from xfs_inactive. | |
c24b5dfa | 1309 | */ |
58c90473 DC |
1310 | if (ip) { |
1311 | xfs_finish_inode_setup(ip); | |
c24b5dfa | 1312 | IRELE(ip); |
58c90473 | 1313 | } |
c24b5dfa DC |
1314 | |
1315 | xfs_qm_dqrele(udqp); | |
1316 | xfs_qm_dqrele(gdqp); | |
1317 | xfs_qm_dqrele(pdqp); | |
1318 | ||
1319 | if (unlock_dp_on_error) | |
65523218 | 1320 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
1321 | return error; |
1322 | } | |
1323 | ||
99b6436b ZYW |
1324 | int |
1325 | xfs_create_tmpfile( | |
1326 | struct xfs_inode *dp, | |
1327 | struct dentry *dentry, | |
330033d6 BF |
1328 | umode_t mode, |
1329 | struct xfs_inode **ipp) | |
99b6436b ZYW |
1330 | { |
1331 | struct xfs_mount *mp = dp->i_mount; | |
1332 | struct xfs_inode *ip = NULL; | |
1333 | struct xfs_trans *tp = NULL; | |
1334 | int error; | |
99b6436b ZYW |
1335 | prid_t prid; |
1336 | struct xfs_dquot *udqp = NULL; | |
1337 | struct xfs_dquot *gdqp = NULL; | |
1338 | struct xfs_dquot *pdqp = NULL; | |
1339 | struct xfs_trans_res *tres; | |
1340 | uint resblks; | |
1341 | ||
1342 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1343 | return -EIO; |
99b6436b ZYW |
1344 | |
1345 | prid = xfs_get_initial_prid(dp); | |
1346 | ||
1347 | /* | |
1348 | * Make sure that we have allocated dquot(s) on disk. | |
1349 | */ | |
1350 | error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()), | |
1351 | xfs_kgid_to_gid(current_fsgid()), prid, | |
1352 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
1353 | &udqp, &gdqp, &pdqp); | |
1354 | if (error) | |
1355 | return error; | |
1356 | ||
1357 | resblks = XFS_IALLOC_SPACE_RES(mp); | |
99b6436b | 1358 | tres = &M_RES(mp)->tr_create_tmpfile; |
253f4911 CH |
1359 | |
1360 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); | |
2451337d | 1361 | if (error == -ENOSPC) { |
99b6436b ZYW |
1362 | /* No space at all so try a "no-allocation" reservation */ |
1363 | resblks = 0; | |
253f4911 | 1364 | error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp); |
99b6436b | 1365 | } |
4906e215 | 1366 | if (error) |
253f4911 | 1367 | goto out_release_inode; |
99b6436b ZYW |
1368 | |
1369 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, | |
1370 | pdqp, resblks, 1, 0); | |
1371 | if (error) | |
1372 | goto out_trans_cancel; | |
1373 | ||
1374 | error = xfs_dir_ialloc(&tp, dp, mode, 1, 0, | |
1375 | prid, resblks > 0, &ip, NULL); | |
d6077aa3 | 1376 | if (error) |
4906e215 | 1377 | goto out_trans_cancel; |
99b6436b ZYW |
1378 | |
1379 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
1380 | xfs_trans_set_sync(tp); | |
1381 | ||
1382 | /* | |
1383 | * Attach the dquot(s) to the inodes and modify them incore. | |
1384 | * These ids of the inode couldn't have changed since the new | |
1385 | * inode has been locked ever since it was created. | |
1386 | */ | |
1387 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); | |
1388 | ||
99b6436b ZYW |
1389 | error = xfs_iunlink(tp, ip); |
1390 | if (error) | |
4906e215 | 1391 | goto out_trans_cancel; |
99b6436b | 1392 | |
70393313 | 1393 | error = xfs_trans_commit(tp); |
99b6436b ZYW |
1394 | if (error) |
1395 | goto out_release_inode; | |
1396 | ||
1397 | xfs_qm_dqrele(udqp); | |
1398 | xfs_qm_dqrele(gdqp); | |
1399 | xfs_qm_dqrele(pdqp); | |
1400 | ||
330033d6 | 1401 | *ipp = ip; |
99b6436b ZYW |
1402 | return 0; |
1403 | ||
99b6436b | 1404 | out_trans_cancel: |
4906e215 | 1405 | xfs_trans_cancel(tp); |
99b6436b ZYW |
1406 | out_release_inode: |
1407 | /* | |
58c90473 DC |
1408 | * Wait until after the current transaction is aborted to finish the |
1409 | * setup of the inode and release the inode. This prevents recursive | |
1410 | * transactions and deadlocks from xfs_inactive. | |
99b6436b | 1411 | */ |
58c90473 DC |
1412 | if (ip) { |
1413 | xfs_finish_inode_setup(ip); | |
99b6436b | 1414 | IRELE(ip); |
58c90473 | 1415 | } |
99b6436b ZYW |
1416 | |
1417 | xfs_qm_dqrele(udqp); | |
1418 | xfs_qm_dqrele(gdqp); | |
1419 | xfs_qm_dqrele(pdqp); | |
1420 | ||
1421 | return error; | |
1422 | } | |
1423 | ||
c24b5dfa DC |
1424 | int |
1425 | xfs_link( | |
1426 | xfs_inode_t *tdp, | |
1427 | xfs_inode_t *sip, | |
1428 | struct xfs_name *target_name) | |
1429 | { | |
1430 | xfs_mount_t *mp = tdp->i_mount; | |
1431 | xfs_trans_t *tp; | |
1432 | int error; | |
2c3234d1 | 1433 | struct xfs_defer_ops dfops; |
c24b5dfa | 1434 | xfs_fsblock_t first_block; |
c24b5dfa DC |
1435 | int resblks; |
1436 | ||
1437 | trace_xfs_link(tdp, target_name); | |
1438 | ||
c19b3b05 | 1439 | ASSERT(!S_ISDIR(VFS_I(sip)->i_mode)); |
c24b5dfa DC |
1440 | |
1441 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1442 | return -EIO; |
c24b5dfa DC |
1443 | |
1444 | error = xfs_qm_dqattach(sip, 0); | |
1445 | if (error) | |
1446 | goto std_return; | |
1447 | ||
1448 | error = xfs_qm_dqattach(tdp, 0); | |
1449 | if (error) | |
1450 | goto std_return; | |
1451 | ||
c24b5dfa | 1452 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
253f4911 | 1453 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, resblks, 0, 0, &tp); |
2451337d | 1454 | if (error == -ENOSPC) { |
c24b5dfa | 1455 | resblks = 0; |
253f4911 | 1456 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, 0, 0, 0, &tp); |
c24b5dfa | 1457 | } |
4906e215 | 1458 | if (error) |
253f4911 | 1459 | goto std_return; |
c24b5dfa DC |
1460 | |
1461 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); | |
1462 | ||
1463 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); | |
65523218 | 1464 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
1465 | |
1466 | /* | |
1467 | * If we are using project inheritance, we only allow hard link | |
1468 | * creation in our tree when the project IDs are the same; else | |
1469 | * the tree quota mechanism could be circumvented. | |
1470 | */ | |
1471 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
1472 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { | |
2451337d | 1473 | error = -EXDEV; |
c24b5dfa DC |
1474 | goto error_return; |
1475 | } | |
1476 | ||
94f3cad5 ES |
1477 | if (!resblks) { |
1478 | error = xfs_dir_canenter(tp, tdp, target_name); | |
1479 | if (error) | |
1480 | goto error_return; | |
1481 | } | |
c24b5dfa | 1482 | |
2c3234d1 | 1483 | xfs_defer_init(&dfops, &first_block); |
c24b5dfa | 1484 | |
54d7b5c1 DC |
1485 | /* |
1486 | * Handle initial link state of O_TMPFILE inode | |
1487 | */ | |
1488 | if (VFS_I(sip)->i_nlink == 0) { | |
ab297431 ZYW |
1489 | error = xfs_iunlink_remove(tp, sip); |
1490 | if (error) | |
4906e215 | 1491 | goto error_return; |
ab297431 ZYW |
1492 | } |
1493 | ||
c24b5dfa | 1494 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2c3234d1 | 1495 | &first_block, &dfops, resblks); |
c24b5dfa | 1496 | if (error) |
4906e215 | 1497 | goto error_return; |
c24b5dfa DC |
1498 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1499 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); | |
1500 | ||
1501 | error = xfs_bumplink(tp, sip); | |
1502 | if (error) | |
4906e215 | 1503 | goto error_return; |
c24b5dfa DC |
1504 | |
1505 | /* | |
1506 | * If this is a synchronous mount, make sure that the | |
1507 | * link transaction goes to disk before returning to | |
1508 | * the user. | |
1509 | */ | |
f6106efa | 1510 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
c24b5dfa | 1511 | xfs_trans_set_sync(tp); |
c24b5dfa | 1512 | |
2c3234d1 | 1513 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa | 1514 | if (error) { |
2c3234d1 | 1515 | xfs_defer_cancel(&dfops); |
4906e215 | 1516 | goto error_return; |
c24b5dfa DC |
1517 | } |
1518 | ||
70393313 | 1519 | return xfs_trans_commit(tp); |
c24b5dfa | 1520 | |
c24b5dfa | 1521 | error_return: |
4906e215 | 1522 | xfs_trans_cancel(tp); |
c24b5dfa DC |
1523 | std_return: |
1524 | return error; | |
1525 | } | |
1526 | ||
1da177e4 | 1527 | /* |
8f04c47a CH |
1528 | * Free up the underlying blocks past new_size. The new size must be smaller |
1529 | * than the current size. This routine can be used both for the attribute and | |
1530 | * data fork, and does not modify the inode size, which is left to the caller. | |
1da177e4 | 1531 | * |
f6485057 DC |
1532 | * The transaction passed to this routine must have made a permanent log |
1533 | * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the | |
1534 | * given transaction and start new ones, so make sure everything involved in | |
1535 | * the transaction is tidy before calling here. Some transaction will be | |
1536 | * returned to the caller to be committed. The incoming transaction must | |
1537 | * already include the inode, and both inode locks must be held exclusively. | |
1538 | * The inode must also be "held" within the transaction. On return the inode | |
1539 | * will be "held" within the returned transaction. This routine does NOT | |
1540 | * require any disk space to be reserved for it within the transaction. | |
1da177e4 | 1541 | * |
f6485057 DC |
1542 | * If we get an error, we must return with the inode locked and linked into the |
1543 | * current transaction. This keeps things simple for the higher level code, | |
1544 | * because it always knows that the inode is locked and held in the transaction | |
1545 | * that returns to it whether errors occur or not. We don't mark the inode | |
1546 | * dirty on error so that transactions can be easily aborted if possible. | |
1da177e4 LT |
1547 | */ |
1548 | int | |
8f04c47a CH |
1549 | xfs_itruncate_extents( |
1550 | struct xfs_trans **tpp, | |
1551 | struct xfs_inode *ip, | |
1552 | int whichfork, | |
1553 | xfs_fsize_t new_size) | |
1da177e4 | 1554 | { |
8f04c47a CH |
1555 | struct xfs_mount *mp = ip->i_mount; |
1556 | struct xfs_trans *tp = *tpp; | |
2c3234d1 | 1557 | struct xfs_defer_ops dfops; |
8f04c47a CH |
1558 | xfs_fsblock_t first_block; |
1559 | xfs_fileoff_t first_unmap_block; | |
1560 | xfs_fileoff_t last_block; | |
1561 | xfs_filblks_t unmap_len; | |
8f04c47a CH |
1562 | int error = 0; |
1563 | int done = 0; | |
1da177e4 | 1564 | |
0b56185b CH |
1565 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1566 | ASSERT(!atomic_read(&VFS_I(ip)->i_count) || | |
1567 | xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
ce7ae151 | 1568 | ASSERT(new_size <= XFS_ISIZE(ip)); |
8f04c47a | 1569 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
1da177e4 | 1570 | ASSERT(ip->i_itemp != NULL); |
898621d5 | 1571 | ASSERT(ip->i_itemp->ili_lock_flags == 0); |
8f04c47a | 1572 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); |
1da177e4 | 1573 | |
673e8e59 CH |
1574 | trace_xfs_itruncate_extents_start(ip, new_size); |
1575 | ||
1da177e4 LT |
1576 | /* |
1577 | * Since it is possible for space to become allocated beyond | |
1578 | * the end of the file (in a crash where the space is allocated | |
1579 | * but the inode size is not yet updated), simply remove any | |
1580 | * blocks which show up between the new EOF and the maximum | |
1581 | * possible file size. If the first block to be removed is | |
1582 | * beyond the maximum file size (ie it is the same as last_block), | |
1583 | * then there is nothing to do. | |
1584 | */ | |
8f04c47a | 1585 | first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
32972383 | 1586 | last_block = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
8f04c47a CH |
1587 | if (first_unmap_block == last_block) |
1588 | return 0; | |
1589 | ||
1590 | ASSERT(first_unmap_block < last_block); | |
1591 | unmap_len = last_block - first_unmap_block + 1; | |
1da177e4 | 1592 | while (!done) { |
2c3234d1 | 1593 | xfs_defer_init(&dfops, &first_block); |
8f04c47a | 1594 | error = xfs_bunmapi(tp, ip, |
3e57ecf6 | 1595 | first_unmap_block, unmap_len, |
8f04c47a | 1596 | xfs_bmapi_aflag(whichfork), |
1da177e4 | 1597 | XFS_ITRUNC_MAX_EXTENTS, |
2c3234d1 | 1598 | &first_block, &dfops, |
b4e9181e | 1599 | &done); |
8f04c47a CH |
1600 | if (error) |
1601 | goto out_bmap_cancel; | |
1da177e4 LT |
1602 | |
1603 | /* | |
1604 | * Duplicate the transaction that has the permanent | |
1605 | * reservation and commit the old transaction. | |
1606 | */ | |
2c3234d1 | 1607 | error = xfs_defer_finish(&tp, &dfops, ip); |
8f04c47a CH |
1608 | if (error) |
1609 | goto out_bmap_cancel; | |
1da177e4 | 1610 | |
2e6db6c4 | 1611 | error = xfs_trans_roll(&tp, ip); |
f6485057 | 1612 | if (error) |
8f04c47a | 1613 | goto out; |
1da177e4 | 1614 | } |
8f04c47a | 1615 | |
aa8968f2 DW |
1616 | /* Remove all pending CoW reservations. */ |
1617 | error = xfs_reflink_cancel_cow_blocks(ip, &tp, first_unmap_block, | |
1618 | last_block); | |
1619 | if (error) | |
1620 | goto out; | |
1621 | ||
1622 | /* | |
1623 | * Clear the reflink flag if we truncated everything. | |
1624 | */ | |
83104d44 | 1625 | if (ip->i_d.di_nblocks == 0 && xfs_is_reflink_inode(ip)) { |
aa8968f2 | 1626 | ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; |
83104d44 DW |
1627 | xfs_inode_clear_cowblocks_tag(ip); |
1628 | } | |
aa8968f2 | 1629 | |
673e8e59 CH |
1630 | /* |
1631 | * Always re-log the inode so that our permanent transaction can keep | |
1632 | * on rolling it forward in the log. | |
1633 | */ | |
1634 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1635 | ||
1636 | trace_xfs_itruncate_extents_end(ip, new_size); | |
1637 | ||
8f04c47a CH |
1638 | out: |
1639 | *tpp = tp; | |
1640 | return error; | |
1641 | out_bmap_cancel: | |
1da177e4 | 1642 | /* |
8f04c47a CH |
1643 | * If the bunmapi call encounters an error, return to the caller where |
1644 | * the transaction can be properly aborted. We just need to make sure | |
1645 | * we're not holding any resources that we were not when we came in. | |
1da177e4 | 1646 | */ |
2c3234d1 | 1647 | xfs_defer_cancel(&dfops); |
8f04c47a CH |
1648 | goto out; |
1649 | } | |
1650 | ||
c24b5dfa DC |
1651 | int |
1652 | xfs_release( | |
1653 | xfs_inode_t *ip) | |
1654 | { | |
1655 | xfs_mount_t *mp = ip->i_mount; | |
1656 | int error; | |
1657 | ||
c19b3b05 | 1658 | if (!S_ISREG(VFS_I(ip)->i_mode) || (VFS_I(ip)->i_mode == 0)) |
c24b5dfa DC |
1659 | return 0; |
1660 | ||
1661 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
1662 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
1663 | return 0; | |
1664 | ||
1665 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1666 | int truncated; | |
1667 | ||
c24b5dfa DC |
1668 | /* |
1669 | * If we previously truncated this file and removed old data | |
1670 | * in the process, we want to initiate "early" writeout on | |
1671 | * the last close. This is an attempt to combat the notorious | |
1672 | * NULL files problem which is particularly noticeable from a | |
1673 | * truncate down, buffered (re-)write (delalloc), followed by | |
1674 | * a crash. What we are effectively doing here is | |
1675 | * significantly reducing the time window where we'd otherwise | |
1676 | * be exposed to that problem. | |
1677 | */ | |
1678 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); | |
1679 | if (truncated) { | |
1680 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
eac152b4 | 1681 | if (ip->i_delayed_blks > 0) { |
2451337d | 1682 | error = filemap_flush(VFS_I(ip)->i_mapping); |
c24b5dfa DC |
1683 | if (error) |
1684 | return error; | |
1685 | } | |
1686 | } | |
1687 | } | |
1688 | ||
54d7b5c1 | 1689 | if (VFS_I(ip)->i_nlink == 0) |
c24b5dfa DC |
1690 | return 0; |
1691 | ||
1692 | if (xfs_can_free_eofblocks(ip, false)) { | |
1693 | ||
1694 | /* | |
1695 | * If we can't get the iolock just skip truncating the blocks | |
1696 | * past EOF because we could deadlock with the mmap_sem | |
1697 | * otherwise. We'll get another chance to drop them once the | |
1698 | * last reference to the inode is dropped, so we'll never leak | |
1699 | * blocks permanently. | |
1700 | * | |
1701 | * Further, check if the inode is being opened, written and | |
1702 | * closed frequently and we have delayed allocation blocks | |
1703 | * outstanding (e.g. streaming writes from the NFS server), | |
1704 | * truncating the blocks past EOF will cause fragmentation to | |
1705 | * occur. | |
1706 | * | |
1707 | * In this case don't do the truncation, either, but we have to | |
1708 | * be careful how we detect this case. Blocks beyond EOF show | |
1709 | * up as i_delayed_blks even when the inode is clean, so we | |
1710 | * need to truncate them away first before checking for a dirty | |
1711 | * release. Hence on the first dirty close we will still remove | |
1712 | * the speculative allocation, but after that we will leave it | |
1713 | * in place. | |
1714 | */ | |
1715 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
1716 | return 0; | |
1717 | ||
1718 | error = xfs_free_eofblocks(mp, ip, true); | |
2451337d | 1719 | if (error && error != -EAGAIN) |
c24b5dfa DC |
1720 | return error; |
1721 | ||
1722 | /* delalloc blocks after truncation means it really is dirty */ | |
1723 | if (ip->i_delayed_blks) | |
1724 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
1725 | } | |
1726 | return 0; | |
1727 | } | |
1728 | ||
f7be2d7f BF |
1729 | /* |
1730 | * xfs_inactive_truncate | |
1731 | * | |
1732 | * Called to perform a truncate when an inode becomes unlinked. | |
1733 | */ | |
1734 | STATIC int | |
1735 | xfs_inactive_truncate( | |
1736 | struct xfs_inode *ip) | |
1737 | { | |
1738 | struct xfs_mount *mp = ip->i_mount; | |
1739 | struct xfs_trans *tp; | |
1740 | int error; | |
1741 | ||
253f4911 | 1742 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
f7be2d7f BF |
1743 | if (error) { |
1744 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
f7be2d7f BF |
1745 | return error; |
1746 | } | |
1747 | ||
1748 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1749 | xfs_trans_ijoin(tp, ip, 0); | |
1750 | ||
1751 | /* | |
1752 | * Log the inode size first to prevent stale data exposure in the event | |
1753 | * of a system crash before the truncate completes. See the related | |
69bca807 | 1754 | * comment in xfs_vn_setattr_size() for details. |
f7be2d7f BF |
1755 | */ |
1756 | ip->i_d.di_size = 0; | |
1757 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1758 | ||
1759 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); | |
1760 | if (error) | |
1761 | goto error_trans_cancel; | |
1762 | ||
1763 | ASSERT(ip->i_d.di_nextents == 0); | |
1764 | ||
70393313 | 1765 | error = xfs_trans_commit(tp); |
f7be2d7f BF |
1766 | if (error) |
1767 | goto error_unlock; | |
1768 | ||
1769 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1770 | return 0; | |
1771 | ||
1772 | error_trans_cancel: | |
4906e215 | 1773 | xfs_trans_cancel(tp); |
f7be2d7f BF |
1774 | error_unlock: |
1775 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1776 | return error; | |
1777 | } | |
1778 | ||
88877d2b BF |
1779 | /* |
1780 | * xfs_inactive_ifree() | |
1781 | * | |
1782 | * Perform the inode free when an inode is unlinked. | |
1783 | */ | |
1784 | STATIC int | |
1785 | xfs_inactive_ifree( | |
1786 | struct xfs_inode *ip) | |
1787 | { | |
2c3234d1 | 1788 | struct xfs_defer_ops dfops; |
88877d2b | 1789 | xfs_fsblock_t first_block; |
88877d2b BF |
1790 | struct xfs_mount *mp = ip->i_mount; |
1791 | struct xfs_trans *tp; | |
1792 | int error; | |
1793 | ||
9d43b180 | 1794 | /* |
76d771b4 CH |
1795 | * We try to use a per-AG reservation for any block needed by the finobt |
1796 | * tree, but as the finobt feature predates the per-AG reservation | |
1797 | * support a degraded file system might not have enough space for the | |
1798 | * reservation at mount time. In that case try to dip into the reserved | |
1799 | * pool and pray. | |
9d43b180 BF |
1800 | * |
1801 | * Send a warning if the reservation does happen to fail, as the inode | |
1802 | * now remains allocated and sits on the unlinked list until the fs is | |
1803 | * repaired. | |
1804 | */ | |
76d771b4 CH |
1805 | if (unlikely(mp->m_inotbt_nores)) { |
1806 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree, | |
1807 | XFS_IFREE_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, | |
1808 | &tp); | |
1809 | } else { | |
1810 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree, 0, 0, 0, &tp); | |
1811 | } | |
88877d2b | 1812 | if (error) { |
2451337d | 1813 | if (error == -ENOSPC) { |
9d43b180 BF |
1814 | xfs_warn_ratelimited(mp, |
1815 | "Failed to remove inode(s) from unlinked list. " | |
1816 | "Please free space, unmount and run xfs_repair."); | |
1817 | } else { | |
1818 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1819 | } | |
88877d2b BF |
1820 | return error; |
1821 | } | |
1822 | ||
1823 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1824 | xfs_trans_ijoin(tp, ip, 0); | |
1825 | ||
2c3234d1 DW |
1826 | xfs_defer_init(&dfops, &first_block); |
1827 | error = xfs_ifree(tp, ip, &dfops); | |
88877d2b BF |
1828 | if (error) { |
1829 | /* | |
1830 | * If we fail to free the inode, shut down. The cancel | |
1831 | * might do that, we need to make sure. Otherwise the | |
1832 | * inode might be lost for a long time or forever. | |
1833 | */ | |
1834 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1835 | xfs_notice(mp, "%s: xfs_ifree returned error %d", | |
1836 | __func__, error); | |
1837 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); | |
1838 | } | |
4906e215 | 1839 | xfs_trans_cancel(tp); |
88877d2b BF |
1840 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1841 | return error; | |
1842 | } | |
1843 | ||
1844 | /* | |
1845 | * Credit the quota account(s). The inode is gone. | |
1846 | */ | |
1847 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); | |
1848 | ||
1849 | /* | |
d4a97a04 BF |
1850 | * Just ignore errors at this point. There is nothing we can do except |
1851 | * to try to keep going. Make sure it's not a silent error. | |
88877d2b | 1852 | */ |
2c3234d1 | 1853 | error = xfs_defer_finish(&tp, &dfops, NULL); |
d4a97a04 | 1854 | if (error) { |
310a75a3 | 1855 | xfs_notice(mp, "%s: xfs_defer_finish returned error %d", |
88877d2b | 1856 | __func__, error); |
2c3234d1 | 1857 | xfs_defer_cancel(&dfops); |
d4a97a04 | 1858 | } |
70393313 | 1859 | error = xfs_trans_commit(tp); |
88877d2b BF |
1860 | if (error) |
1861 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", | |
1862 | __func__, error); | |
1863 | ||
1864 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1865 | return 0; | |
1866 | } | |
1867 | ||
c24b5dfa DC |
1868 | /* |
1869 | * xfs_inactive | |
1870 | * | |
1871 | * This is called when the vnode reference count for the vnode | |
1872 | * goes to zero. If the file has been unlinked, then it must | |
1873 | * now be truncated. Also, we clear all of the read-ahead state | |
1874 | * kept for the inode here since the file is now closed. | |
1875 | */ | |
74564fb4 | 1876 | void |
c24b5dfa DC |
1877 | xfs_inactive( |
1878 | xfs_inode_t *ip) | |
1879 | { | |
3d3c8b52 | 1880 | struct xfs_mount *mp; |
3d3c8b52 JL |
1881 | int error; |
1882 | int truncate = 0; | |
c24b5dfa DC |
1883 | |
1884 | /* | |
1885 | * If the inode is already free, then there can be nothing | |
1886 | * to clean up here. | |
1887 | */ | |
c19b3b05 | 1888 | if (VFS_I(ip)->i_mode == 0) { |
c24b5dfa DC |
1889 | ASSERT(ip->i_df.if_real_bytes == 0); |
1890 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
74564fb4 | 1891 | return; |
c24b5dfa DC |
1892 | } |
1893 | ||
1894 | mp = ip->i_mount; | |
17c12bcd | 1895 | ASSERT(!xfs_iflags_test(ip, XFS_IRECOVERY)); |
c24b5dfa | 1896 | |
c24b5dfa DC |
1897 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
1898 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
74564fb4 | 1899 | return; |
c24b5dfa | 1900 | |
54d7b5c1 | 1901 | if (VFS_I(ip)->i_nlink != 0) { |
c24b5dfa DC |
1902 | /* |
1903 | * force is true because we are evicting an inode from the | |
1904 | * cache. Post-eof blocks must be freed, lest we end up with | |
1905 | * broken free space accounting. | |
1906 | */ | |
74564fb4 BF |
1907 | if (xfs_can_free_eofblocks(ip, true)) |
1908 | xfs_free_eofblocks(mp, ip, false); | |
1909 | ||
1910 | return; | |
c24b5dfa DC |
1911 | } |
1912 | ||
c19b3b05 | 1913 | if (S_ISREG(VFS_I(ip)->i_mode) && |
c24b5dfa DC |
1914 | (ip->i_d.di_size != 0 || XFS_ISIZE(ip) != 0 || |
1915 | ip->i_d.di_nextents > 0 || ip->i_delayed_blks > 0)) | |
1916 | truncate = 1; | |
1917 | ||
1918 | error = xfs_qm_dqattach(ip, 0); | |
1919 | if (error) | |
74564fb4 | 1920 | return; |
c24b5dfa | 1921 | |
c19b3b05 | 1922 | if (S_ISLNK(VFS_I(ip)->i_mode)) |
36b21dde | 1923 | error = xfs_inactive_symlink(ip); |
f7be2d7f BF |
1924 | else if (truncate) |
1925 | error = xfs_inactive_truncate(ip); | |
1926 | if (error) | |
74564fb4 | 1927 | return; |
c24b5dfa DC |
1928 | |
1929 | /* | |
1930 | * If there are attributes associated with the file then blow them away | |
1931 | * now. The code calls a routine that recursively deconstructs the | |
6dfe5a04 | 1932 | * attribute fork. If also blows away the in-core attribute fork. |
c24b5dfa | 1933 | */ |
6dfe5a04 | 1934 | if (XFS_IFORK_Q(ip)) { |
c24b5dfa DC |
1935 | error = xfs_attr_inactive(ip); |
1936 | if (error) | |
74564fb4 | 1937 | return; |
c24b5dfa DC |
1938 | } |
1939 | ||
6dfe5a04 | 1940 | ASSERT(!ip->i_afp); |
c24b5dfa | 1941 | ASSERT(ip->i_d.di_anextents == 0); |
6dfe5a04 | 1942 | ASSERT(ip->i_d.di_forkoff == 0); |
c24b5dfa DC |
1943 | |
1944 | /* | |
1945 | * Free the inode. | |
1946 | */ | |
88877d2b BF |
1947 | error = xfs_inactive_ifree(ip); |
1948 | if (error) | |
74564fb4 | 1949 | return; |
c24b5dfa DC |
1950 | |
1951 | /* | |
1952 | * Release the dquots held by inode, if any. | |
1953 | */ | |
1954 | xfs_qm_dqdetach(ip); | |
c24b5dfa DC |
1955 | } |
1956 | ||
1da177e4 | 1957 | /* |
54d7b5c1 DC |
1958 | * This is called when the inode's link count goes to 0 or we are creating a |
1959 | * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be | |
1960 | * set to true as the link count is dropped to zero by the VFS after we've | |
1961 | * created the file successfully, so we have to add it to the unlinked list | |
1962 | * while the link count is non-zero. | |
1963 | * | |
1964 | * We place the on-disk inode on a list in the AGI. It will be pulled from this | |
1965 | * list when the inode is freed. | |
1da177e4 | 1966 | */ |
54d7b5c1 | 1967 | STATIC int |
1da177e4 | 1968 | xfs_iunlink( |
54d7b5c1 DC |
1969 | struct xfs_trans *tp, |
1970 | struct xfs_inode *ip) | |
1da177e4 | 1971 | { |
54d7b5c1 | 1972 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1973 | xfs_agi_t *agi; |
1974 | xfs_dinode_t *dip; | |
1975 | xfs_buf_t *agibp; | |
1976 | xfs_buf_t *ibp; | |
1da177e4 LT |
1977 | xfs_agino_t agino; |
1978 | short bucket_index; | |
1979 | int offset; | |
1980 | int error; | |
1da177e4 | 1981 | |
c19b3b05 | 1982 | ASSERT(VFS_I(ip)->i_mode != 0); |
1da177e4 | 1983 | |
1da177e4 LT |
1984 | /* |
1985 | * Get the agi buffer first. It ensures lock ordering | |
1986 | * on the list. | |
1987 | */ | |
5e1be0fb | 1988 | error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp); |
859d7182 | 1989 | if (error) |
1da177e4 | 1990 | return error; |
1da177e4 | 1991 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 1992 | |
1da177e4 LT |
1993 | /* |
1994 | * Get the index into the agi hash table for the | |
1995 | * list this inode will go on. | |
1996 | */ | |
1997 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
1998 | ASSERT(agino != 0); | |
1999 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
2000 | ASSERT(agi->agi_unlinked[bucket_index]); | |
16259e7d | 2001 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino); |
1da177e4 | 2002 | |
69ef921b | 2003 | if (agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)) { |
1da177e4 LT |
2004 | /* |
2005 | * There is already another inode in the bucket we need | |
2006 | * to add ourselves to. Add us at the front of the list. | |
2007 | * Here we put the head pointer into our next pointer, | |
2008 | * and then we fall through to point the head at us. | |
2009 | */ | |
475ee413 CH |
2010 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2011 | 0, 0); | |
c319b58b VA |
2012 | if (error) |
2013 | return error; | |
2014 | ||
69ef921b | 2015 | ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO)); |
1da177e4 | 2016 | dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; |
92bfc6e7 | 2017 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2018 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2019 | |
2020 | /* need to recalc the inode CRC if appropriate */ | |
2021 | xfs_dinode_calc_crc(mp, dip); | |
2022 | ||
1da177e4 LT |
2023 | xfs_trans_inode_buf(tp, ibp); |
2024 | xfs_trans_log_buf(tp, ibp, offset, | |
2025 | (offset + sizeof(xfs_agino_t) - 1)); | |
2026 | xfs_inobp_check(mp, ibp); | |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * Point the bucket head pointer at the inode being inserted. | |
2031 | */ | |
2032 | ASSERT(agino != 0); | |
16259e7d | 2033 | agi->agi_unlinked[bucket_index] = cpu_to_be32(agino); |
1da177e4 LT |
2034 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
2035 | (sizeof(xfs_agino_t) * bucket_index); | |
2036 | xfs_trans_log_buf(tp, agibp, offset, | |
2037 | (offset + sizeof(xfs_agino_t) - 1)); | |
2038 | return 0; | |
2039 | } | |
2040 | ||
2041 | /* | |
2042 | * Pull the on-disk inode from the AGI unlinked list. | |
2043 | */ | |
2044 | STATIC int | |
2045 | xfs_iunlink_remove( | |
2046 | xfs_trans_t *tp, | |
2047 | xfs_inode_t *ip) | |
2048 | { | |
2049 | xfs_ino_t next_ino; | |
2050 | xfs_mount_t *mp; | |
2051 | xfs_agi_t *agi; | |
2052 | xfs_dinode_t *dip; | |
2053 | xfs_buf_t *agibp; | |
2054 | xfs_buf_t *ibp; | |
2055 | xfs_agnumber_t agno; | |
1da177e4 LT |
2056 | xfs_agino_t agino; |
2057 | xfs_agino_t next_agino; | |
2058 | xfs_buf_t *last_ibp; | |
6fdf8ccc | 2059 | xfs_dinode_t *last_dip = NULL; |
1da177e4 | 2060 | short bucket_index; |
6fdf8ccc | 2061 | int offset, last_offset = 0; |
1da177e4 | 2062 | int error; |
1da177e4 | 2063 | |
1da177e4 | 2064 | mp = tp->t_mountp; |
1da177e4 | 2065 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
1da177e4 LT |
2066 | |
2067 | /* | |
2068 | * Get the agi buffer first. It ensures lock ordering | |
2069 | * on the list. | |
2070 | */ | |
5e1be0fb CH |
2071 | error = xfs_read_agi(mp, tp, agno, &agibp); |
2072 | if (error) | |
1da177e4 | 2073 | return error; |
5e1be0fb | 2074 | |
1da177e4 | 2075 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 2076 | |
1da177e4 LT |
2077 | /* |
2078 | * Get the index into the agi hash table for the | |
2079 | * list this inode will go on. | |
2080 | */ | |
2081 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
2082 | ASSERT(agino != 0); | |
2083 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
69ef921b | 2084 | ASSERT(agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)); |
1da177e4 LT |
2085 | ASSERT(agi->agi_unlinked[bucket_index]); |
2086 | ||
16259e7d | 2087 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) { |
1da177e4 | 2088 | /* |
475ee413 CH |
2089 | * We're at the head of the list. Get the inode's on-disk |
2090 | * buffer to see if there is anyone after us on the list. | |
2091 | * Only modify our next pointer if it is not already NULLAGINO. | |
2092 | * This saves us the overhead of dealing with the buffer when | |
2093 | * there is no need to change it. | |
1da177e4 | 2094 | */ |
475ee413 CH |
2095 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2096 | 0, 0); | |
1da177e4 | 2097 | if (error) { |
475ee413 | 2098 | xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 2099 | __func__, error); |
1da177e4 LT |
2100 | return error; |
2101 | } | |
347d1c01 | 2102 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
2103 | ASSERT(next_agino != 0); |
2104 | if (next_agino != NULLAGINO) { | |
347d1c01 | 2105 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 2106 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2107 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2108 | |
2109 | /* need to recalc the inode CRC if appropriate */ | |
2110 | xfs_dinode_calc_crc(mp, dip); | |
2111 | ||
1da177e4 LT |
2112 | xfs_trans_inode_buf(tp, ibp); |
2113 | xfs_trans_log_buf(tp, ibp, offset, | |
2114 | (offset + sizeof(xfs_agino_t) - 1)); | |
2115 | xfs_inobp_check(mp, ibp); | |
2116 | } else { | |
2117 | xfs_trans_brelse(tp, ibp); | |
2118 | } | |
2119 | /* | |
2120 | * Point the bucket head pointer at the next inode. | |
2121 | */ | |
2122 | ASSERT(next_agino != 0); | |
2123 | ASSERT(next_agino != agino); | |
16259e7d | 2124 | agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino); |
1da177e4 LT |
2125 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
2126 | (sizeof(xfs_agino_t) * bucket_index); | |
2127 | xfs_trans_log_buf(tp, agibp, offset, | |
2128 | (offset + sizeof(xfs_agino_t) - 1)); | |
2129 | } else { | |
2130 | /* | |
2131 | * We need to search the list for the inode being freed. | |
2132 | */ | |
16259e7d | 2133 | next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]); |
1da177e4 LT |
2134 | last_ibp = NULL; |
2135 | while (next_agino != agino) { | |
129dbc9a CH |
2136 | struct xfs_imap imap; |
2137 | ||
2138 | if (last_ibp) | |
1da177e4 | 2139 | xfs_trans_brelse(tp, last_ibp); |
129dbc9a CH |
2140 | |
2141 | imap.im_blkno = 0; | |
1da177e4 | 2142 | next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino); |
129dbc9a CH |
2143 | |
2144 | error = xfs_imap(mp, tp, next_ino, &imap, 0); | |
2145 | if (error) { | |
2146 | xfs_warn(mp, | |
2147 | "%s: xfs_imap returned error %d.", | |
2148 | __func__, error); | |
2149 | return error; | |
2150 | } | |
2151 | ||
2152 | error = xfs_imap_to_bp(mp, tp, &imap, &last_dip, | |
2153 | &last_ibp, 0, 0); | |
1da177e4 | 2154 | if (error) { |
0b932ccc | 2155 | xfs_warn(mp, |
129dbc9a | 2156 | "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 2157 | __func__, error); |
1da177e4 LT |
2158 | return error; |
2159 | } | |
129dbc9a CH |
2160 | |
2161 | last_offset = imap.im_boffset; | |
347d1c01 | 2162 | next_agino = be32_to_cpu(last_dip->di_next_unlinked); |
1da177e4 LT |
2163 | ASSERT(next_agino != NULLAGINO); |
2164 | ASSERT(next_agino != 0); | |
2165 | } | |
475ee413 | 2166 | |
1da177e4 | 2167 | /* |
475ee413 CH |
2168 | * Now last_ibp points to the buffer previous to us on the |
2169 | * unlinked list. Pull us from the list. | |
1da177e4 | 2170 | */ |
475ee413 CH |
2171 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2172 | 0, 0); | |
1da177e4 | 2173 | if (error) { |
475ee413 | 2174 | xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.", |
0b932ccc | 2175 | __func__, error); |
1da177e4 LT |
2176 | return error; |
2177 | } | |
347d1c01 | 2178 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
2179 | ASSERT(next_agino != 0); |
2180 | ASSERT(next_agino != agino); | |
2181 | if (next_agino != NULLAGINO) { | |
347d1c01 | 2182 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 2183 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2184 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2185 | |
2186 | /* need to recalc the inode CRC if appropriate */ | |
2187 | xfs_dinode_calc_crc(mp, dip); | |
2188 | ||
1da177e4 LT |
2189 | xfs_trans_inode_buf(tp, ibp); |
2190 | xfs_trans_log_buf(tp, ibp, offset, | |
2191 | (offset + sizeof(xfs_agino_t) - 1)); | |
2192 | xfs_inobp_check(mp, ibp); | |
2193 | } else { | |
2194 | xfs_trans_brelse(tp, ibp); | |
2195 | } | |
2196 | /* | |
2197 | * Point the previous inode on the list to the next inode. | |
2198 | */ | |
347d1c01 | 2199 | last_dip->di_next_unlinked = cpu_to_be32(next_agino); |
1da177e4 LT |
2200 | ASSERT(next_agino != 0); |
2201 | offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked); | |
0a32c26e DC |
2202 | |
2203 | /* need to recalc the inode CRC if appropriate */ | |
2204 | xfs_dinode_calc_crc(mp, last_dip); | |
2205 | ||
1da177e4 LT |
2206 | xfs_trans_inode_buf(tp, last_ibp); |
2207 | xfs_trans_log_buf(tp, last_ibp, offset, | |
2208 | (offset + sizeof(xfs_agino_t) - 1)); | |
2209 | xfs_inobp_check(mp, last_ibp); | |
2210 | } | |
2211 | return 0; | |
2212 | } | |
2213 | ||
5b3eed75 | 2214 | /* |
0b8182db | 2215 | * A big issue when freeing the inode cluster is that we _cannot_ skip any |
5b3eed75 DC |
2216 | * inodes that are in memory - they all must be marked stale and attached to |
2217 | * the cluster buffer. | |
2218 | */ | |
2a30f36d | 2219 | STATIC int |
1da177e4 | 2220 | xfs_ifree_cluster( |
09b56604 BF |
2221 | xfs_inode_t *free_ip, |
2222 | xfs_trans_t *tp, | |
2223 | struct xfs_icluster *xic) | |
1da177e4 LT |
2224 | { |
2225 | xfs_mount_t *mp = free_ip->i_mount; | |
2226 | int blks_per_cluster; | |
982e939e | 2227 | int inodes_per_cluster; |
1da177e4 | 2228 | int nbufs; |
5b257b4a | 2229 | int i, j; |
3cdaa189 | 2230 | int ioffset; |
1da177e4 LT |
2231 | xfs_daddr_t blkno; |
2232 | xfs_buf_t *bp; | |
5b257b4a | 2233 | xfs_inode_t *ip; |
1da177e4 LT |
2234 | xfs_inode_log_item_t *iip; |
2235 | xfs_log_item_t *lip; | |
5017e97d | 2236 | struct xfs_perag *pag; |
09b56604 | 2237 | xfs_ino_t inum; |
1da177e4 | 2238 | |
09b56604 | 2239 | inum = xic->first_ino; |
5017e97d | 2240 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum)); |
982e939e JL |
2241 | blks_per_cluster = xfs_icluster_size_fsb(mp); |
2242 | inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog; | |
2243 | nbufs = mp->m_ialloc_blks / blks_per_cluster; | |
1da177e4 | 2244 | |
982e939e | 2245 | for (j = 0; j < nbufs; j++, inum += inodes_per_cluster) { |
09b56604 BF |
2246 | /* |
2247 | * The allocation bitmap tells us which inodes of the chunk were | |
2248 | * physically allocated. Skip the cluster if an inode falls into | |
2249 | * a sparse region. | |
2250 | */ | |
3cdaa189 BF |
2251 | ioffset = inum - xic->first_ino; |
2252 | if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) { | |
2253 | ASSERT(do_mod(ioffset, inodes_per_cluster) == 0); | |
09b56604 BF |
2254 | continue; |
2255 | } | |
2256 | ||
1da177e4 LT |
2257 | blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum), |
2258 | XFS_INO_TO_AGBNO(mp, inum)); | |
2259 | ||
5b257b4a DC |
2260 | /* |
2261 | * We obtain and lock the backing buffer first in the process | |
2262 | * here, as we have to ensure that any dirty inode that we | |
2263 | * can't get the flush lock on is attached to the buffer. | |
2264 | * If we scan the in-memory inodes first, then buffer IO can | |
2265 | * complete before we get a lock on it, and hence we may fail | |
2266 | * to mark all the active inodes on the buffer stale. | |
2267 | */ | |
2268 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, | |
b6aff29f DC |
2269 | mp->m_bsize * blks_per_cluster, |
2270 | XBF_UNMAPPED); | |
5b257b4a | 2271 | |
2a30f36d | 2272 | if (!bp) |
2451337d | 2273 | return -ENOMEM; |
b0f539de DC |
2274 | |
2275 | /* | |
2276 | * This buffer may not have been correctly initialised as we | |
2277 | * didn't read it from disk. That's not important because we are | |
2278 | * only using to mark the buffer as stale in the log, and to | |
2279 | * attach stale cached inodes on it. That means it will never be | |
2280 | * dispatched for IO. If it is, we want to know about it, and we | |
2281 | * want it to fail. We can acheive this by adding a write | |
2282 | * verifier to the buffer. | |
2283 | */ | |
1813dd64 | 2284 | bp->b_ops = &xfs_inode_buf_ops; |
b0f539de | 2285 | |
5b257b4a DC |
2286 | /* |
2287 | * Walk the inodes already attached to the buffer and mark them | |
2288 | * stale. These will all have the flush locks held, so an | |
5b3eed75 DC |
2289 | * in-memory inode walk can't lock them. By marking them all |
2290 | * stale first, we will not attempt to lock them in the loop | |
2291 | * below as the XFS_ISTALE flag will be set. | |
5b257b4a | 2292 | */ |
adadbeef | 2293 | lip = bp->b_fspriv; |
5b257b4a DC |
2294 | while (lip) { |
2295 | if (lip->li_type == XFS_LI_INODE) { | |
2296 | iip = (xfs_inode_log_item_t *)lip; | |
2297 | ASSERT(iip->ili_logged == 1); | |
ca30b2a7 | 2298 | lip->li_cb = xfs_istale_done; |
5b257b4a DC |
2299 | xfs_trans_ail_copy_lsn(mp->m_ail, |
2300 | &iip->ili_flush_lsn, | |
2301 | &iip->ili_item.li_lsn); | |
2302 | xfs_iflags_set(iip->ili_inode, XFS_ISTALE); | |
5b257b4a DC |
2303 | } |
2304 | lip = lip->li_bio_list; | |
2305 | } | |
1da177e4 | 2306 | |
5b3eed75 | 2307 | |
1da177e4 | 2308 | /* |
5b257b4a DC |
2309 | * For each inode in memory attempt to add it to the inode |
2310 | * buffer and set it up for being staled on buffer IO | |
2311 | * completion. This is safe as we've locked out tail pushing | |
2312 | * and flushing by locking the buffer. | |
1da177e4 | 2313 | * |
5b257b4a DC |
2314 | * We have already marked every inode that was part of a |
2315 | * transaction stale above, which means there is no point in | |
2316 | * even trying to lock them. | |
1da177e4 | 2317 | */ |
982e939e | 2318 | for (i = 0; i < inodes_per_cluster; i++) { |
5b3eed75 | 2319 | retry: |
1a3e8f3d | 2320 | rcu_read_lock(); |
da353b0d DC |
2321 | ip = radix_tree_lookup(&pag->pag_ici_root, |
2322 | XFS_INO_TO_AGINO(mp, (inum + i))); | |
1da177e4 | 2323 | |
1a3e8f3d DC |
2324 | /* Inode not in memory, nothing to do */ |
2325 | if (!ip) { | |
2326 | rcu_read_unlock(); | |
1da177e4 LT |
2327 | continue; |
2328 | } | |
2329 | ||
1a3e8f3d DC |
2330 | /* |
2331 | * because this is an RCU protected lookup, we could | |
2332 | * find a recently freed or even reallocated inode | |
2333 | * during the lookup. We need to check under the | |
2334 | * i_flags_lock for a valid inode here. Skip it if it | |
2335 | * is not valid, the wrong inode or stale. | |
2336 | */ | |
2337 | spin_lock(&ip->i_flags_lock); | |
2338 | if (ip->i_ino != inum + i || | |
2339 | __xfs_iflags_test(ip, XFS_ISTALE)) { | |
2340 | spin_unlock(&ip->i_flags_lock); | |
2341 | rcu_read_unlock(); | |
2342 | continue; | |
2343 | } | |
2344 | spin_unlock(&ip->i_flags_lock); | |
2345 | ||
5b3eed75 DC |
2346 | /* |
2347 | * Don't try to lock/unlock the current inode, but we | |
2348 | * _cannot_ skip the other inodes that we did not find | |
2349 | * in the list attached to the buffer and are not | |
2350 | * already marked stale. If we can't lock it, back off | |
2351 | * and retry. | |
2352 | */ | |
5b257b4a DC |
2353 | if (ip != free_ip && |
2354 | !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { | |
1a3e8f3d | 2355 | rcu_read_unlock(); |
5b3eed75 DC |
2356 | delay(1); |
2357 | goto retry; | |
1da177e4 | 2358 | } |
1a3e8f3d | 2359 | rcu_read_unlock(); |
1da177e4 | 2360 | |
5b3eed75 | 2361 | xfs_iflock(ip); |
5b257b4a | 2362 | xfs_iflags_set(ip, XFS_ISTALE); |
1da177e4 | 2363 | |
5b3eed75 DC |
2364 | /* |
2365 | * we don't need to attach clean inodes or those only | |
2366 | * with unlogged changes (which we throw away, anyway). | |
2367 | */ | |
1da177e4 | 2368 | iip = ip->i_itemp; |
5b3eed75 | 2369 | if (!iip || xfs_inode_clean(ip)) { |
5b257b4a | 2370 | ASSERT(ip != free_ip); |
1da177e4 LT |
2371 | xfs_ifunlock(ip); |
2372 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2373 | continue; | |
2374 | } | |
2375 | ||
f5d8d5c4 CH |
2376 | iip->ili_last_fields = iip->ili_fields; |
2377 | iip->ili_fields = 0; | |
fc0561ce | 2378 | iip->ili_fsync_fields = 0; |
1da177e4 | 2379 | iip->ili_logged = 1; |
7b2e2a31 DC |
2380 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
2381 | &iip->ili_item.li_lsn); | |
1da177e4 | 2382 | |
ca30b2a7 CH |
2383 | xfs_buf_attach_iodone(bp, xfs_istale_done, |
2384 | &iip->ili_item); | |
5b257b4a DC |
2385 | |
2386 | if (ip != free_ip) | |
1da177e4 | 2387 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
2388 | } |
2389 | ||
5b3eed75 | 2390 | xfs_trans_stale_inode_buf(tp, bp); |
1da177e4 LT |
2391 | xfs_trans_binval(tp, bp); |
2392 | } | |
2393 | ||
5017e97d | 2394 | xfs_perag_put(pag); |
2a30f36d | 2395 | return 0; |
1da177e4 LT |
2396 | } |
2397 | ||
2398 | /* | |
2399 | * This is called to return an inode to the inode free list. | |
2400 | * The inode should already be truncated to 0 length and have | |
2401 | * no pages associated with it. This routine also assumes that | |
2402 | * the inode is already a part of the transaction. | |
2403 | * | |
2404 | * The on-disk copy of the inode will have been added to the list | |
2405 | * of unlinked inodes in the AGI. We need to remove the inode from | |
2406 | * that list atomically with respect to freeing it here. | |
2407 | */ | |
2408 | int | |
2409 | xfs_ifree( | |
2410 | xfs_trans_t *tp, | |
2411 | xfs_inode_t *ip, | |
2c3234d1 | 2412 | struct xfs_defer_ops *dfops) |
1da177e4 LT |
2413 | { |
2414 | int error; | |
09b56604 | 2415 | struct xfs_icluster xic = { 0 }; |
1da177e4 | 2416 | |
579aa9ca | 2417 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
54d7b5c1 | 2418 | ASSERT(VFS_I(ip)->i_nlink == 0); |
1da177e4 LT |
2419 | ASSERT(ip->i_d.di_nextents == 0); |
2420 | ASSERT(ip->i_d.di_anextents == 0); | |
c19b3b05 | 2421 | ASSERT(ip->i_d.di_size == 0 || !S_ISREG(VFS_I(ip)->i_mode)); |
1da177e4 LT |
2422 | ASSERT(ip->i_d.di_nblocks == 0); |
2423 | ||
2424 | /* | |
2425 | * Pull the on-disk inode from the AGI unlinked list. | |
2426 | */ | |
2427 | error = xfs_iunlink_remove(tp, ip); | |
1baaed8f | 2428 | if (error) |
1da177e4 | 2429 | return error; |
1da177e4 | 2430 | |
2c3234d1 | 2431 | error = xfs_difree(tp, ip->i_ino, dfops, &xic); |
1baaed8f | 2432 | if (error) |
1da177e4 | 2433 | return error; |
1baaed8f | 2434 | |
c19b3b05 | 2435 | VFS_I(ip)->i_mode = 0; /* mark incore inode as free */ |
1da177e4 LT |
2436 | ip->i_d.di_flags = 0; |
2437 | ip->i_d.di_dmevmask = 0; | |
2438 | ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */ | |
1da177e4 LT |
2439 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
2440 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
2441 | /* | |
2442 | * Bump the generation count so no one will be confused | |
2443 | * by reincarnations of this inode. | |
2444 | */ | |
9e9a2674 | 2445 | VFS_I(ip)->i_generation++; |
1da177e4 LT |
2446 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
2447 | ||
09b56604 BF |
2448 | if (xic.deleted) |
2449 | error = xfs_ifree_cluster(ip, tp, &xic); | |
1da177e4 | 2450 | |
2a30f36d | 2451 | return error; |
1da177e4 LT |
2452 | } |
2453 | ||
1da177e4 | 2454 | /* |
60ec6783 CH |
2455 | * This is called to unpin an inode. The caller must have the inode locked |
2456 | * in at least shared mode so that the buffer cannot be subsequently pinned | |
2457 | * once someone is waiting for it to be unpinned. | |
1da177e4 | 2458 | */ |
60ec6783 | 2459 | static void |
f392e631 | 2460 | xfs_iunpin( |
60ec6783 | 2461 | struct xfs_inode *ip) |
1da177e4 | 2462 | { |
579aa9ca | 2463 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 | 2464 | |
4aaf15d1 DC |
2465 | trace_xfs_inode_unpin_nowait(ip, _RET_IP_); |
2466 | ||
a3f74ffb | 2467 | /* Give the log a push to start the unpinning I/O */ |
60ec6783 | 2468 | xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0); |
a14a348b | 2469 | |
a3f74ffb | 2470 | } |
1da177e4 | 2471 | |
f392e631 CH |
2472 | static void |
2473 | __xfs_iunpin_wait( | |
2474 | struct xfs_inode *ip) | |
2475 | { | |
2476 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IPINNED_BIT); | |
2477 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IPINNED_BIT); | |
2478 | ||
2479 | xfs_iunpin(ip); | |
2480 | ||
2481 | do { | |
2482 | prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
2483 | if (xfs_ipincount(ip)) | |
2484 | io_schedule(); | |
2485 | } while (xfs_ipincount(ip)); | |
2486 | finish_wait(wq, &wait.wait); | |
2487 | } | |
2488 | ||
777df5af | 2489 | void |
a3f74ffb | 2490 | xfs_iunpin_wait( |
60ec6783 | 2491 | struct xfs_inode *ip) |
a3f74ffb | 2492 | { |
f392e631 CH |
2493 | if (xfs_ipincount(ip)) |
2494 | __xfs_iunpin_wait(ip); | |
1da177e4 LT |
2495 | } |
2496 | ||
27320369 DC |
2497 | /* |
2498 | * Removing an inode from the namespace involves removing the directory entry | |
2499 | * and dropping the link count on the inode. Removing the directory entry can | |
2500 | * result in locking an AGF (directory blocks were freed) and removing a link | |
2501 | * count can result in placing the inode on an unlinked list which results in | |
2502 | * locking an AGI. | |
2503 | * | |
2504 | * The big problem here is that we have an ordering constraint on AGF and AGI | |
2505 | * locking - inode allocation locks the AGI, then can allocate a new extent for | |
2506 | * new inodes, locking the AGF after the AGI. Similarly, freeing the inode | |
2507 | * removes the inode from the unlinked list, requiring that we lock the AGI | |
2508 | * first, and then freeing the inode can result in an inode chunk being freed | |
2509 | * and hence freeing disk space requiring that we lock an AGF. | |
2510 | * | |
2511 | * Hence the ordering that is imposed by other parts of the code is AGI before | |
2512 | * AGF. This means we cannot remove the directory entry before we drop the inode | |
2513 | * reference count and put it on the unlinked list as this results in a lock | |
2514 | * order of AGF then AGI, and this can deadlock against inode allocation and | |
2515 | * freeing. Therefore we must drop the link counts before we remove the | |
2516 | * directory entry. | |
2517 | * | |
2518 | * This is still safe from a transactional point of view - it is not until we | |
310a75a3 | 2519 | * get to xfs_defer_finish() that we have the possibility of multiple |
27320369 DC |
2520 | * transactions in this operation. Hence as long as we remove the directory |
2521 | * entry and drop the link count in the first transaction of the remove | |
2522 | * operation, there are no transactional constraints on the ordering here. | |
2523 | */ | |
c24b5dfa DC |
2524 | int |
2525 | xfs_remove( | |
2526 | xfs_inode_t *dp, | |
2527 | struct xfs_name *name, | |
2528 | xfs_inode_t *ip) | |
2529 | { | |
2530 | xfs_mount_t *mp = dp->i_mount; | |
2531 | xfs_trans_t *tp = NULL; | |
c19b3b05 | 2532 | int is_dir = S_ISDIR(VFS_I(ip)->i_mode); |
c24b5dfa | 2533 | int error = 0; |
2c3234d1 | 2534 | struct xfs_defer_ops dfops; |
c24b5dfa | 2535 | xfs_fsblock_t first_block; |
c24b5dfa | 2536 | uint resblks; |
c24b5dfa DC |
2537 | |
2538 | trace_xfs_remove(dp, name); | |
2539 | ||
2540 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 2541 | return -EIO; |
c24b5dfa DC |
2542 | |
2543 | error = xfs_qm_dqattach(dp, 0); | |
2544 | if (error) | |
2545 | goto std_return; | |
2546 | ||
2547 | error = xfs_qm_dqattach(ip, 0); | |
2548 | if (error) | |
2549 | goto std_return; | |
2550 | ||
c24b5dfa DC |
2551 | /* |
2552 | * We try to get the real space reservation first, | |
2553 | * allowing for directory btree deletion(s) implying | |
2554 | * possible bmap insert(s). If we can't get the space | |
2555 | * reservation then we use 0 instead, and avoid the bmap | |
2556 | * btree insert(s) in the directory code by, if the bmap | |
2557 | * insert tries to happen, instead trimming the LAST | |
2558 | * block from the directory. | |
2559 | */ | |
2560 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
253f4911 | 2561 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_remove, resblks, 0, 0, &tp); |
2451337d | 2562 | if (error == -ENOSPC) { |
c24b5dfa | 2563 | resblks = 0; |
253f4911 CH |
2564 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_remove, 0, 0, 0, |
2565 | &tp); | |
c24b5dfa DC |
2566 | } |
2567 | if (error) { | |
2451337d | 2568 | ASSERT(error != -ENOSPC); |
253f4911 | 2569 | goto std_return; |
c24b5dfa DC |
2570 | } |
2571 | ||
2572 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); | |
2573 | ||
65523218 | 2574 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
2575 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
2576 | ||
2577 | /* | |
2578 | * If we're removing a directory perform some additional validation. | |
2579 | */ | |
2580 | if (is_dir) { | |
54d7b5c1 DC |
2581 | ASSERT(VFS_I(ip)->i_nlink >= 2); |
2582 | if (VFS_I(ip)->i_nlink != 2) { | |
2451337d | 2583 | error = -ENOTEMPTY; |
c24b5dfa DC |
2584 | goto out_trans_cancel; |
2585 | } | |
2586 | if (!xfs_dir_isempty(ip)) { | |
2451337d | 2587 | error = -ENOTEMPTY; |
c24b5dfa DC |
2588 | goto out_trans_cancel; |
2589 | } | |
c24b5dfa | 2590 | |
27320369 | 2591 | /* Drop the link from ip's "..". */ |
c24b5dfa DC |
2592 | error = xfs_droplink(tp, dp); |
2593 | if (error) | |
27320369 | 2594 | goto out_trans_cancel; |
c24b5dfa | 2595 | |
27320369 | 2596 | /* Drop the "." link from ip to self. */ |
c24b5dfa DC |
2597 | error = xfs_droplink(tp, ip); |
2598 | if (error) | |
27320369 | 2599 | goto out_trans_cancel; |
c24b5dfa DC |
2600 | } else { |
2601 | /* | |
2602 | * When removing a non-directory we need to log the parent | |
2603 | * inode here. For a directory this is done implicitly | |
2604 | * by the xfs_droplink call for the ".." entry. | |
2605 | */ | |
2606 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2607 | } | |
27320369 | 2608 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
c24b5dfa | 2609 | |
27320369 | 2610 | /* Drop the link from dp to ip. */ |
c24b5dfa DC |
2611 | error = xfs_droplink(tp, ip); |
2612 | if (error) | |
27320369 | 2613 | goto out_trans_cancel; |
c24b5dfa | 2614 | |
2c3234d1 | 2615 | xfs_defer_init(&dfops, &first_block); |
27320369 | 2616 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
2c3234d1 | 2617 | &first_block, &dfops, resblks); |
27320369 | 2618 | if (error) { |
2451337d | 2619 | ASSERT(error != -ENOENT); |
27320369 DC |
2620 | goto out_bmap_cancel; |
2621 | } | |
2622 | ||
c24b5dfa DC |
2623 | /* |
2624 | * If this is a synchronous mount, make sure that the | |
2625 | * remove transaction goes to disk before returning to | |
2626 | * the user. | |
2627 | */ | |
2628 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
2629 | xfs_trans_set_sync(tp); | |
2630 | ||
2c3234d1 | 2631 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa DC |
2632 | if (error) |
2633 | goto out_bmap_cancel; | |
2634 | ||
70393313 | 2635 | error = xfs_trans_commit(tp); |
c24b5dfa DC |
2636 | if (error) |
2637 | goto std_return; | |
2638 | ||
2cd2ef6a | 2639 | if (is_dir && xfs_inode_is_filestream(ip)) |
c24b5dfa DC |
2640 | xfs_filestream_deassociate(ip); |
2641 | ||
2642 | return 0; | |
2643 | ||
2644 | out_bmap_cancel: | |
2c3234d1 | 2645 | xfs_defer_cancel(&dfops); |
c24b5dfa | 2646 | out_trans_cancel: |
4906e215 | 2647 | xfs_trans_cancel(tp); |
c24b5dfa DC |
2648 | std_return: |
2649 | return error; | |
2650 | } | |
2651 | ||
f6bba201 DC |
2652 | /* |
2653 | * Enter all inodes for a rename transaction into a sorted array. | |
2654 | */ | |
95afcf5c | 2655 | #define __XFS_SORT_INODES 5 |
f6bba201 DC |
2656 | STATIC void |
2657 | xfs_sort_for_rename( | |
95afcf5c DC |
2658 | struct xfs_inode *dp1, /* in: old (source) directory inode */ |
2659 | struct xfs_inode *dp2, /* in: new (target) directory inode */ | |
2660 | struct xfs_inode *ip1, /* in: inode of old entry */ | |
2661 | struct xfs_inode *ip2, /* in: inode of new entry */ | |
2662 | struct xfs_inode *wip, /* in: whiteout inode */ | |
2663 | struct xfs_inode **i_tab,/* out: sorted array of inodes */ | |
2664 | int *num_inodes) /* in/out: inodes in array */ | |
f6bba201 | 2665 | { |
f6bba201 DC |
2666 | int i, j; |
2667 | ||
95afcf5c DC |
2668 | ASSERT(*num_inodes == __XFS_SORT_INODES); |
2669 | memset(i_tab, 0, *num_inodes * sizeof(struct xfs_inode *)); | |
2670 | ||
f6bba201 DC |
2671 | /* |
2672 | * i_tab contains a list of pointers to inodes. We initialize | |
2673 | * the table here & we'll sort it. We will then use it to | |
2674 | * order the acquisition of the inode locks. | |
2675 | * | |
2676 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
2677 | */ | |
95afcf5c DC |
2678 | i = 0; |
2679 | i_tab[i++] = dp1; | |
2680 | i_tab[i++] = dp2; | |
2681 | i_tab[i++] = ip1; | |
2682 | if (ip2) | |
2683 | i_tab[i++] = ip2; | |
2684 | if (wip) | |
2685 | i_tab[i++] = wip; | |
2686 | *num_inodes = i; | |
f6bba201 DC |
2687 | |
2688 | /* | |
2689 | * Sort the elements via bubble sort. (Remember, there are at | |
95afcf5c | 2690 | * most 5 elements to sort, so this is adequate.) |
f6bba201 DC |
2691 | */ |
2692 | for (i = 0; i < *num_inodes; i++) { | |
2693 | for (j = 1; j < *num_inodes; j++) { | |
2694 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { | |
95afcf5c | 2695 | struct xfs_inode *temp = i_tab[j]; |
f6bba201 DC |
2696 | i_tab[j] = i_tab[j-1]; |
2697 | i_tab[j-1] = temp; | |
2698 | } | |
2699 | } | |
2700 | } | |
2701 | } | |
2702 | ||
310606b0 DC |
2703 | static int |
2704 | xfs_finish_rename( | |
2705 | struct xfs_trans *tp, | |
2c3234d1 | 2706 | struct xfs_defer_ops *dfops) |
310606b0 | 2707 | { |
310606b0 DC |
2708 | int error; |
2709 | ||
2710 | /* | |
2711 | * If this is a synchronous mount, make sure that the rename transaction | |
2712 | * goes to disk before returning to the user. | |
2713 | */ | |
2714 | if (tp->t_mountp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
2715 | xfs_trans_set_sync(tp); | |
2716 | ||
2c3234d1 | 2717 | error = xfs_defer_finish(&tp, dfops, NULL); |
310606b0 | 2718 | if (error) { |
2c3234d1 | 2719 | xfs_defer_cancel(dfops); |
4906e215 | 2720 | xfs_trans_cancel(tp); |
310606b0 DC |
2721 | return error; |
2722 | } | |
2723 | ||
70393313 | 2724 | return xfs_trans_commit(tp); |
310606b0 DC |
2725 | } |
2726 | ||
d31a1825 CM |
2727 | /* |
2728 | * xfs_cross_rename() | |
2729 | * | |
2730 | * responsible for handling RENAME_EXCHANGE flag in renameat2() sytemcall | |
2731 | */ | |
2732 | STATIC int | |
2733 | xfs_cross_rename( | |
2734 | struct xfs_trans *tp, | |
2735 | struct xfs_inode *dp1, | |
2736 | struct xfs_name *name1, | |
2737 | struct xfs_inode *ip1, | |
2738 | struct xfs_inode *dp2, | |
2739 | struct xfs_name *name2, | |
2740 | struct xfs_inode *ip2, | |
2c3234d1 | 2741 | struct xfs_defer_ops *dfops, |
d31a1825 CM |
2742 | xfs_fsblock_t *first_block, |
2743 | int spaceres) | |
2744 | { | |
2745 | int error = 0; | |
2746 | int ip1_flags = 0; | |
2747 | int ip2_flags = 0; | |
2748 | int dp2_flags = 0; | |
2749 | ||
2750 | /* Swap inode number for dirent in first parent */ | |
2751 | error = xfs_dir_replace(tp, dp1, name1, | |
2752 | ip2->i_ino, | |
2c3234d1 | 2753 | first_block, dfops, spaceres); |
d31a1825 | 2754 | if (error) |
eeacd321 | 2755 | goto out_trans_abort; |
d31a1825 CM |
2756 | |
2757 | /* Swap inode number for dirent in second parent */ | |
2758 | error = xfs_dir_replace(tp, dp2, name2, | |
2759 | ip1->i_ino, | |
2c3234d1 | 2760 | first_block, dfops, spaceres); |
d31a1825 | 2761 | if (error) |
eeacd321 | 2762 | goto out_trans_abort; |
d31a1825 CM |
2763 | |
2764 | /* | |
2765 | * If we're renaming one or more directories across different parents, | |
2766 | * update the respective ".." entries (and link counts) to match the new | |
2767 | * parents. | |
2768 | */ | |
2769 | if (dp1 != dp2) { | |
2770 | dp2_flags = XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2771 | ||
c19b3b05 | 2772 | if (S_ISDIR(VFS_I(ip2)->i_mode)) { |
d31a1825 CM |
2773 | error = xfs_dir_replace(tp, ip2, &xfs_name_dotdot, |
2774 | dp1->i_ino, first_block, | |
2c3234d1 | 2775 | dfops, spaceres); |
d31a1825 | 2776 | if (error) |
eeacd321 | 2777 | goto out_trans_abort; |
d31a1825 CM |
2778 | |
2779 | /* transfer ip2 ".." reference to dp1 */ | |
c19b3b05 | 2780 | if (!S_ISDIR(VFS_I(ip1)->i_mode)) { |
d31a1825 CM |
2781 | error = xfs_droplink(tp, dp2); |
2782 | if (error) | |
eeacd321 | 2783 | goto out_trans_abort; |
d31a1825 CM |
2784 | error = xfs_bumplink(tp, dp1); |
2785 | if (error) | |
eeacd321 | 2786 | goto out_trans_abort; |
d31a1825 CM |
2787 | } |
2788 | ||
2789 | /* | |
2790 | * Although ip1 isn't changed here, userspace needs | |
2791 | * to be warned about the change, so that applications | |
2792 | * relying on it (like backup ones), will properly | |
2793 | * notify the change | |
2794 | */ | |
2795 | ip1_flags |= XFS_ICHGTIME_CHG; | |
2796 | ip2_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2797 | } | |
2798 | ||
c19b3b05 | 2799 | if (S_ISDIR(VFS_I(ip1)->i_mode)) { |
d31a1825 CM |
2800 | error = xfs_dir_replace(tp, ip1, &xfs_name_dotdot, |
2801 | dp2->i_ino, first_block, | |
2c3234d1 | 2802 | dfops, spaceres); |
d31a1825 | 2803 | if (error) |
eeacd321 | 2804 | goto out_trans_abort; |
d31a1825 CM |
2805 | |
2806 | /* transfer ip1 ".." reference to dp2 */ | |
c19b3b05 | 2807 | if (!S_ISDIR(VFS_I(ip2)->i_mode)) { |
d31a1825 CM |
2808 | error = xfs_droplink(tp, dp1); |
2809 | if (error) | |
eeacd321 | 2810 | goto out_trans_abort; |
d31a1825 CM |
2811 | error = xfs_bumplink(tp, dp2); |
2812 | if (error) | |
eeacd321 | 2813 | goto out_trans_abort; |
d31a1825 CM |
2814 | } |
2815 | ||
2816 | /* | |
2817 | * Although ip2 isn't changed here, userspace needs | |
2818 | * to be warned about the change, so that applications | |
2819 | * relying on it (like backup ones), will properly | |
2820 | * notify the change | |
2821 | */ | |
2822 | ip1_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2823 | ip2_flags |= XFS_ICHGTIME_CHG; | |
2824 | } | |
2825 | } | |
2826 | ||
2827 | if (ip1_flags) { | |
2828 | xfs_trans_ichgtime(tp, ip1, ip1_flags); | |
2829 | xfs_trans_log_inode(tp, ip1, XFS_ILOG_CORE); | |
2830 | } | |
2831 | if (ip2_flags) { | |
2832 | xfs_trans_ichgtime(tp, ip2, ip2_flags); | |
2833 | xfs_trans_log_inode(tp, ip2, XFS_ILOG_CORE); | |
2834 | } | |
2835 | if (dp2_flags) { | |
2836 | xfs_trans_ichgtime(tp, dp2, dp2_flags); | |
2837 | xfs_trans_log_inode(tp, dp2, XFS_ILOG_CORE); | |
2838 | } | |
2839 | xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2840 | xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE); | |
2c3234d1 | 2841 | return xfs_finish_rename(tp, dfops); |
eeacd321 DC |
2842 | |
2843 | out_trans_abort: | |
2c3234d1 | 2844 | xfs_defer_cancel(dfops); |
4906e215 | 2845 | xfs_trans_cancel(tp); |
d31a1825 CM |
2846 | return error; |
2847 | } | |
2848 | ||
7dcf5c3e DC |
2849 | /* |
2850 | * xfs_rename_alloc_whiteout() | |
2851 | * | |
2852 | * Return a referenced, unlinked, unlocked inode that that can be used as a | |
2853 | * whiteout in a rename transaction. We use a tmpfile inode here so that if we | |
2854 | * crash between allocating the inode and linking it into the rename transaction | |
2855 | * recovery will free the inode and we won't leak it. | |
2856 | */ | |
2857 | static int | |
2858 | xfs_rename_alloc_whiteout( | |
2859 | struct xfs_inode *dp, | |
2860 | struct xfs_inode **wip) | |
2861 | { | |
2862 | struct xfs_inode *tmpfile; | |
2863 | int error; | |
2864 | ||
2865 | error = xfs_create_tmpfile(dp, NULL, S_IFCHR | WHITEOUT_MODE, &tmpfile); | |
2866 | if (error) | |
2867 | return error; | |
2868 | ||
22419ac9 BF |
2869 | /* |
2870 | * Prepare the tmpfile inode as if it were created through the VFS. | |
2871 | * Otherwise, the link increment paths will complain about nlink 0->1. | |
2872 | * Drop the link count as done by d_tmpfile(), complete the inode setup | |
2873 | * and flag it as linkable. | |
2874 | */ | |
2875 | drop_nlink(VFS_I(tmpfile)); | |
2b3d1d41 | 2876 | xfs_setup_iops(tmpfile); |
7dcf5c3e DC |
2877 | xfs_finish_inode_setup(tmpfile); |
2878 | VFS_I(tmpfile)->i_state |= I_LINKABLE; | |
2879 | ||
2880 | *wip = tmpfile; | |
2881 | return 0; | |
2882 | } | |
2883 | ||
f6bba201 DC |
2884 | /* |
2885 | * xfs_rename | |
2886 | */ | |
2887 | int | |
2888 | xfs_rename( | |
7dcf5c3e DC |
2889 | struct xfs_inode *src_dp, |
2890 | struct xfs_name *src_name, | |
2891 | struct xfs_inode *src_ip, | |
2892 | struct xfs_inode *target_dp, | |
2893 | struct xfs_name *target_name, | |
2894 | struct xfs_inode *target_ip, | |
2895 | unsigned int flags) | |
f6bba201 | 2896 | { |
7dcf5c3e DC |
2897 | struct xfs_mount *mp = src_dp->i_mount; |
2898 | struct xfs_trans *tp; | |
2c3234d1 | 2899 | struct xfs_defer_ops dfops; |
7dcf5c3e DC |
2900 | xfs_fsblock_t first_block; |
2901 | struct xfs_inode *wip = NULL; /* whiteout inode */ | |
2902 | struct xfs_inode *inodes[__XFS_SORT_INODES]; | |
2903 | int num_inodes = __XFS_SORT_INODES; | |
2b93681f | 2904 | bool new_parent = (src_dp != target_dp); |
c19b3b05 | 2905 | bool src_is_directory = S_ISDIR(VFS_I(src_ip)->i_mode); |
7dcf5c3e DC |
2906 | int spaceres; |
2907 | int error; | |
f6bba201 DC |
2908 | |
2909 | trace_xfs_rename(src_dp, target_dp, src_name, target_name); | |
2910 | ||
eeacd321 DC |
2911 | if ((flags & RENAME_EXCHANGE) && !target_ip) |
2912 | return -EINVAL; | |
2913 | ||
7dcf5c3e DC |
2914 | /* |
2915 | * If we are doing a whiteout operation, allocate the whiteout inode | |
2916 | * we will be placing at the target and ensure the type is set | |
2917 | * appropriately. | |
2918 | */ | |
2919 | if (flags & RENAME_WHITEOUT) { | |
2920 | ASSERT(!(flags & (RENAME_NOREPLACE | RENAME_EXCHANGE))); | |
2921 | error = xfs_rename_alloc_whiteout(target_dp, &wip); | |
2922 | if (error) | |
2923 | return error; | |
2924 | ||
2925 | /* setup target dirent info as whiteout */ | |
2926 | src_name->type = XFS_DIR3_FT_CHRDEV; | |
2927 | } | |
f6bba201 | 2928 | |
7dcf5c3e | 2929 | xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, wip, |
f6bba201 DC |
2930 | inodes, &num_inodes); |
2931 | ||
f6bba201 | 2932 | spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len); |
253f4911 | 2933 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, spaceres, 0, 0, &tp); |
2451337d | 2934 | if (error == -ENOSPC) { |
f6bba201 | 2935 | spaceres = 0; |
253f4911 CH |
2936 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, 0, 0, 0, |
2937 | &tp); | |
f6bba201 | 2938 | } |
445883e8 | 2939 | if (error) |
253f4911 | 2940 | goto out_release_wip; |
f6bba201 DC |
2941 | |
2942 | /* | |
2943 | * Attach the dquots to the inodes | |
2944 | */ | |
2945 | error = xfs_qm_vop_rename_dqattach(inodes); | |
445883e8 DC |
2946 | if (error) |
2947 | goto out_trans_cancel; | |
f6bba201 DC |
2948 | |
2949 | /* | |
2950 | * Lock all the participating inodes. Depending upon whether | |
2951 | * the target_name exists in the target directory, and | |
2952 | * whether the target directory is the same as the source | |
2953 | * directory, we can lock from 2 to 4 inodes. | |
2954 | */ | |
2955 | xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL); | |
2956 | ||
2957 | /* | |
2958 | * Join all the inodes to the transaction. From this point on, | |
2959 | * we can rely on either trans_commit or trans_cancel to unlock | |
2960 | * them. | |
2961 | */ | |
65523218 | 2962 | xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); |
f6bba201 | 2963 | if (new_parent) |
65523218 | 2964 | xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); |
f6bba201 DC |
2965 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); |
2966 | if (target_ip) | |
2967 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); | |
7dcf5c3e DC |
2968 | if (wip) |
2969 | xfs_trans_ijoin(tp, wip, XFS_ILOCK_EXCL); | |
f6bba201 DC |
2970 | |
2971 | /* | |
2972 | * If we are using project inheritance, we only allow renames | |
2973 | * into our tree when the project IDs are the same; else the | |
2974 | * tree quota mechanism would be circumvented. | |
2975 | */ | |
2976 | if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2977 | (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) { | |
2451337d | 2978 | error = -EXDEV; |
445883e8 | 2979 | goto out_trans_cancel; |
f6bba201 DC |
2980 | } |
2981 | ||
2c3234d1 | 2982 | xfs_defer_init(&dfops, &first_block); |
445883e8 | 2983 | |
eeacd321 DC |
2984 | /* RENAME_EXCHANGE is unique from here on. */ |
2985 | if (flags & RENAME_EXCHANGE) | |
2986 | return xfs_cross_rename(tp, src_dp, src_name, src_ip, | |
2987 | target_dp, target_name, target_ip, | |
2c3234d1 | 2988 | &dfops, &first_block, spaceres); |
d31a1825 | 2989 | |
f6bba201 DC |
2990 | /* |
2991 | * Set up the target. | |
2992 | */ | |
2993 | if (target_ip == NULL) { | |
2994 | /* | |
2995 | * If there's no space reservation, check the entry will | |
2996 | * fit before actually inserting it. | |
2997 | */ | |
94f3cad5 ES |
2998 | if (!spaceres) { |
2999 | error = xfs_dir_canenter(tp, target_dp, target_name); | |
3000 | if (error) | |
445883e8 | 3001 | goto out_trans_cancel; |
94f3cad5 | 3002 | } |
f6bba201 DC |
3003 | /* |
3004 | * If target does not exist and the rename crosses | |
3005 | * directories, adjust the target directory link count | |
3006 | * to account for the ".." reference from the new entry. | |
3007 | */ | |
3008 | error = xfs_dir_createname(tp, target_dp, target_name, | |
3009 | src_ip->i_ino, &first_block, | |
2c3234d1 | 3010 | &dfops, spaceres); |
f6bba201 | 3011 | if (error) |
4906e215 | 3012 | goto out_bmap_cancel; |
f6bba201 DC |
3013 | |
3014 | xfs_trans_ichgtime(tp, target_dp, | |
3015 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3016 | ||
3017 | if (new_parent && src_is_directory) { | |
3018 | error = xfs_bumplink(tp, target_dp); | |
3019 | if (error) | |
4906e215 | 3020 | goto out_bmap_cancel; |
f6bba201 DC |
3021 | } |
3022 | } else { /* target_ip != NULL */ | |
3023 | /* | |
3024 | * If target exists and it's a directory, check that both | |
3025 | * target and source are directories and that target can be | |
3026 | * destroyed, or that neither is a directory. | |
3027 | */ | |
c19b3b05 | 3028 | if (S_ISDIR(VFS_I(target_ip)->i_mode)) { |
f6bba201 DC |
3029 | /* |
3030 | * Make sure target dir is empty. | |
3031 | */ | |
3032 | if (!(xfs_dir_isempty(target_ip)) || | |
54d7b5c1 | 3033 | (VFS_I(target_ip)->i_nlink > 2)) { |
2451337d | 3034 | error = -EEXIST; |
445883e8 | 3035 | goto out_trans_cancel; |
f6bba201 DC |
3036 | } |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | * Link the source inode under the target name. | |
3041 | * If the source inode is a directory and we are moving | |
3042 | * it across directories, its ".." entry will be | |
3043 | * inconsistent until we replace that down below. | |
3044 | * | |
3045 | * In case there is already an entry with the same | |
3046 | * name at the destination directory, remove it first. | |
3047 | */ | |
3048 | error = xfs_dir_replace(tp, target_dp, target_name, | |
3049 | src_ip->i_ino, | |
2c3234d1 | 3050 | &first_block, &dfops, spaceres); |
f6bba201 | 3051 | if (error) |
4906e215 | 3052 | goto out_bmap_cancel; |
f6bba201 DC |
3053 | |
3054 | xfs_trans_ichgtime(tp, target_dp, | |
3055 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3056 | ||
3057 | /* | |
3058 | * Decrement the link count on the target since the target | |
3059 | * dir no longer points to it. | |
3060 | */ | |
3061 | error = xfs_droplink(tp, target_ip); | |
3062 | if (error) | |
4906e215 | 3063 | goto out_bmap_cancel; |
f6bba201 DC |
3064 | |
3065 | if (src_is_directory) { | |
3066 | /* | |
3067 | * Drop the link from the old "." entry. | |
3068 | */ | |
3069 | error = xfs_droplink(tp, target_ip); | |
3070 | if (error) | |
4906e215 | 3071 | goto out_bmap_cancel; |
f6bba201 DC |
3072 | } |
3073 | } /* target_ip != NULL */ | |
3074 | ||
3075 | /* | |
3076 | * Remove the source. | |
3077 | */ | |
3078 | if (new_parent && src_is_directory) { | |
3079 | /* | |
3080 | * Rewrite the ".." entry to point to the new | |
3081 | * directory. | |
3082 | */ | |
3083 | error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot, | |
3084 | target_dp->i_ino, | |
2c3234d1 | 3085 | &first_block, &dfops, spaceres); |
2451337d | 3086 | ASSERT(error != -EEXIST); |
f6bba201 | 3087 | if (error) |
4906e215 | 3088 | goto out_bmap_cancel; |
f6bba201 DC |
3089 | } |
3090 | ||
3091 | /* | |
3092 | * We always want to hit the ctime on the source inode. | |
3093 | * | |
3094 | * This isn't strictly required by the standards since the source | |
3095 | * inode isn't really being changed, but old unix file systems did | |
3096 | * it and some incremental backup programs won't work without it. | |
3097 | */ | |
3098 | xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); | |
3099 | xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); | |
3100 | ||
3101 | /* | |
3102 | * Adjust the link count on src_dp. This is necessary when | |
3103 | * renaming a directory, either within one parent when | |
3104 | * the target existed, or across two parent directories. | |
3105 | */ | |
3106 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
3107 | ||
3108 | /* | |
3109 | * Decrement link count on src_directory since the | |
3110 | * entry that's moved no longer points to it. | |
3111 | */ | |
3112 | error = xfs_droplink(tp, src_dp); | |
3113 | if (error) | |
4906e215 | 3114 | goto out_bmap_cancel; |
f6bba201 DC |
3115 | } |
3116 | ||
7dcf5c3e DC |
3117 | /* |
3118 | * For whiteouts, we only need to update the source dirent with the | |
3119 | * inode number of the whiteout inode rather than removing it | |
3120 | * altogether. | |
3121 | */ | |
3122 | if (wip) { | |
3123 | error = xfs_dir_replace(tp, src_dp, src_name, wip->i_ino, | |
2c3234d1 | 3124 | &first_block, &dfops, spaceres); |
7dcf5c3e DC |
3125 | } else |
3126 | error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino, | |
2c3234d1 | 3127 | &first_block, &dfops, spaceres); |
f6bba201 | 3128 | if (error) |
4906e215 | 3129 | goto out_bmap_cancel; |
f6bba201 DC |
3130 | |
3131 | /* | |
7dcf5c3e DC |
3132 | * For whiteouts, we need to bump the link count on the whiteout inode. |
3133 | * This means that failures all the way up to this point leave the inode | |
3134 | * on the unlinked list and so cleanup is a simple matter of dropping | |
3135 | * the remaining reference to it. If we fail here after bumping the link | |
3136 | * count, we're shutting down the filesystem so we'll never see the | |
3137 | * intermediate state on disk. | |
f6bba201 | 3138 | */ |
7dcf5c3e | 3139 | if (wip) { |
54d7b5c1 | 3140 | ASSERT(VFS_I(wip)->i_nlink == 0); |
7dcf5c3e DC |
3141 | error = xfs_bumplink(tp, wip); |
3142 | if (error) | |
4906e215 | 3143 | goto out_bmap_cancel; |
7dcf5c3e DC |
3144 | error = xfs_iunlink_remove(tp, wip); |
3145 | if (error) | |
4906e215 | 3146 | goto out_bmap_cancel; |
7dcf5c3e | 3147 | xfs_trans_log_inode(tp, wip, XFS_ILOG_CORE); |
f6bba201 | 3148 | |
7dcf5c3e DC |
3149 | /* |
3150 | * Now we have a real link, clear the "I'm a tmpfile" state | |
3151 | * flag from the inode so it doesn't accidentally get misused in | |
3152 | * future. | |
3153 | */ | |
3154 | VFS_I(wip)->i_state &= ~I_LINKABLE; | |
f6bba201 DC |
3155 | } |
3156 | ||
f6bba201 DC |
3157 | xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
3158 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); | |
3159 | if (new_parent) | |
3160 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); | |
f6bba201 | 3161 | |
2c3234d1 | 3162 | error = xfs_finish_rename(tp, &dfops); |
7dcf5c3e DC |
3163 | if (wip) |
3164 | IRELE(wip); | |
3165 | return error; | |
f6bba201 | 3166 | |
445883e8 | 3167 | out_bmap_cancel: |
2c3234d1 | 3168 | xfs_defer_cancel(&dfops); |
445883e8 | 3169 | out_trans_cancel: |
4906e215 | 3170 | xfs_trans_cancel(tp); |
253f4911 | 3171 | out_release_wip: |
7dcf5c3e DC |
3172 | if (wip) |
3173 | IRELE(wip); | |
f6bba201 DC |
3174 | return error; |
3175 | } | |
3176 | ||
5c4d97d0 DC |
3177 | STATIC int |
3178 | xfs_iflush_cluster( | |
19429363 DC |
3179 | struct xfs_inode *ip, |
3180 | struct xfs_buf *bp) | |
1da177e4 | 3181 | { |
19429363 | 3182 | struct xfs_mount *mp = ip->i_mount; |
5c4d97d0 DC |
3183 | struct xfs_perag *pag; |
3184 | unsigned long first_index, mask; | |
3185 | unsigned long inodes_per_cluster; | |
19429363 DC |
3186 | int cilist_size; |
3187 | struct xfs_inode **cilist; | |
3188 | struct xfs_inode *cip; | |
5c4d97d0 DC |
3189 | int nr_found; |
3190 | int clcount = 0; | |
3191 | int bufwasdelwri; | |
1da177e4 | 3192 | int i; |
1da177e4 | 3193 | |
5c4d97d0 | 3194 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); |
1da177e4 | 3195 | |
0f49efd8 | 3196 | inodes_per_cluster = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; |
19429363 DC |
3197 | cilist_size = inodes_per_cluster * sizeof(xfs_inode_t *); |
3198 | cilist = kmem_alloc(cilist_size, KM_MAYFAIL|KM_NOFS); | |
3199 | if (!cilist) | |
5c4d97d0 | 3200 | goto out_put; |
1da177e4 | 3201 | |
0f49efd8 | 3202 | mask = ~(((mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog)) - 1); |
5c4d97d0 DC |
3203 | first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; |
3204 | rcu_read_lock(); | |
3205 | /* really need a gang lookup range call here */ | |
19429363 | 3206 | nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)cilist, |
5c4d97d0 DC |
3207 | first_index, inodes_per_cluster); |
3208 | if (nr_found == 0) | |
3209 | goto out_free; | |
3210 | ||
3211 | for (i = 0; i < nr_found; i++) { | |
19429363 DC |
3212 | cip = cilist[i]; |
3213 | if (cip == ip) | |
bad55843 | 3214 | continue; |
1a3e8f3d DC |
3215 | |
3216 | /* | |
3217 | * because this is an RCU protected lookup, we could find a | |
3218 | * recently freed or even reallocated inode during the lookup. | |
3219 | * We need to check under the i_flags_lock for a valid inode | |
3220 | * here. Skip it if it is not valid or the wrong inode. | |
3221 | */ | |
19429363 DC |
3222 | spin_lock(&cip->i_flags_lock); |
3223 | if (!cip->i_ino || | |
3224 | __xfs_iflags_test(cip, XFS_ISTALE)) { | |
3225 | spin_unlock(&cip->i_flags_lock); | |
1a3e8f3d DC |
3226 | continue; |
3227 | } | |
5a90e53e DC |
3228 | |
3229 | /* | |
3230 | * Once we fall off the end of the cluster, no point checking | |
3231 | * any more inodes in the list because they will also all be | |
3232 | * outside the cluster. | |
3233 | */ | |
19429363 DC |
3234 | if ((XFS_INO_TO_AGINO(mp, cip->i_ino) & mask) != first_index) { |
3235 | spin_unlock(&cip->i_flags_lock); | |
5a90e53e DC |
3236 | break; |
3237 | } | |
19429363 | 3238 | spin_unlock(&cip->i_flags_lock); |
1a3e8f3d | 3239 | |
bad55843 DC |
3240 | /* |
3241 | * Do an un-protected check to see if the inode is dirty and | |
3242 | * is a candidate for flushing. These checks will be repeated | |
3243 | * later after the appropriate locks are acquired. | |
3244 | */ | |
19429363 | 3245 | if (xfs_inode_clean(cip) && xfs_ipincount(cip) == 0) |
bad55843 | 3246 | continue; |
bad55843 DC |
3247 | |
3248 | /* | |
3249 | * Try to get locks. If any are unavailable or it is pinned, | |
3250 | * then this inode cannot be flushed and is skipped. | |
3251 | */ | |
3252 | ||
19429363 | 3253 | if (!xfs_ilock_nowait(cip, XFS_ILOCK_SHARED)) |
bad55843 | 3254 | continue; |
19429363 DC |
3255 | if (!xfs_iflock_nowait(cip)) { |
3256 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3257 | continue; |
3258 | } | |
19429363 DC |
3259 | if (xfs_ipincount(cip)) { |
3260 | xfs_ifunlock(cip); | |
3261 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3262 | continue; |
3263 | } | |
3264 | ||
8a17d7dd DC |
3265 | |
3266 | /* | |
3267 | * Check the inode number again, just to be certain we are not | |
3268 | * racing with freeing in xfs_reclaim_inode(). See the comments | |
3269 | * in that function for more information as to why the initial | |
3270 | * check is not sufficient. | |
3271 | */ | |
19429363 DC |
3272 | if (!cip->i_ino) { |
3273 | xfs_ifunlock(cip); | |
3274 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3275 | continue; |
3276 | } | |
3277 | ||
3278 | /* | |
3279 | * arriving here means that this inode can be flushed. First | |
3280 | * re-check that it's dirty before flushing. | |
3281 | */ | |
19429363 | 3282 | if (!xfs_inode_clean(cip)) { |
33540408 | 3283 | int error; |
19429363 | 3284 | error = xfs_iflush_int(cip, bp); |
bad55843 | 3285 | if (error) { |
19429363 | 3286 | xfs_iunlock(cip, XFS_ILOCK_SHARED); |
bad55843 DC |
3287 | goto cluster_corrupt_out; |
3288 | } | |
3289 | clcount++; | |
3290 | } else { | |
19429363 | 3291 | xfs_ifunlock(cip); |
bad55843 | 3292 | } |
19429363 | 3293 | xfs_iunlock(cip, XFS_ILOCK_SHARED); |
bad55843 DC |
3294 | } |
3295 | ||
3296 | if (clcount) { | |
ff6d6af2 BD |
3297 | XFS_STATS_INC(mp, xs_icluster_flushcnt); |
3298 | XFS_STATS_ADD(mp, xs_icluster_flushinode, clcount); | |
bad55843 DC |
3299 | } |
3300 | ||
3301 | out_free: | |
1a3e8f3d | 3302 | rcu_read_unlock(); |
19429363 | 3303 | kmem_free(cilist); |
44b56e0a DC |
3304 | out_put: |
3305 | xfs_perag_put(pag); | |
bad55843 DC |
3306 | return 0; |
3307 | ||
3308 | ||
3309 | cluster_corrupt_out: | |
3310 | /* | |
3311 | * Corruption detected in the clustering loop. Invalidate the | |
3312 | * inode buffer and shut down the filesystem. | |
3313 | */ | |
1a3e8f3d | 3314 | rcu_read_unlock(); |
bad55843 | 3315 | /* |
43ff2122 | 3316 | * Clean up the buffer. If it was delwri, just release it -- |
bad55843 DC |
3317 | * brelse can handle it with no problems. If not, shut down the |
3318 | * filesystem before releasing the buffer. | |
3319 | */ | |
43ff2122 | 3320 | bufwasdelwri = (bp->b_flags & _XBF_DELWRI_Q); |
bad55843 DC |
3321 | if (bufwasdelwri) |
3322 | xfs_buf_relse(bp); | |
3323 | ||
3324 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
3325 | ||
3326 | if (!bufwasdelwri) { | |
3327 | /* | |
3328 | * Just like incore_relse: if we have b_iodone functions, | |
3329 | * mark the buffer as an error and call them. Otherwise | |
3330 | * mark it as stale and brelse. | |
3331 | */ | |
cb669ca5 | 3332 | if (bp->b_iodone) { |
b0388bf1 | 3333 | bp->b_flags &= ~XBF_DONE; |
c867cb61 | 3334 | xfs_buf_stale(bp); |
2451337d | 3335 | xfs_buf_ioerror(bp, -EIO); |
e8aaba9a | 3336 | xfs_buf_ioend(bp); |
bad55843 | 3337 | } else { |
c867cb61 | 3338 | xfs_buf_stale(bp); |
bad55843 DC |
3339 | xfs_buf_relse(bp); |
3340 | } | |
3341 | } | |
3342 | ||
3343 | /* | |
3344 | * Unlocks the flush lock | |
3345 | */ | |
19429363 DC |
3346 | xfs_iflush_abort(cip, false); |
3347 | kmem_free(cilist); | |
44b56e0a | 3348 | xfs_perag_put(pag); |
2451337d | 3349 | return -EFSCORRUPTED; |
bad55843 DC |
3350 | } |
3351 | ||
1da177e4 | 3352 | /* |
4c46819a CH |
3353 | * Flush dirty inode metadata into the backing buffer. |
3354 | * | |
3355 | * The caller must have the inode lock and the inode flush lock held. The | |
3356 | * inode lock will still be held upon return to the caller, and the inode | |
3357 | * flush lock will be released after the inode has reached the disk. | |
3358 | * | |
3359 | * The caller must write out the buffer returned in *bpp and release it. | |
1da177e4 LT |
3360 | */ |
3361 | int | |
3362 | xfs_iflush( | |
4c46819a CH |
3363 | struct xfs_inode *ip, |
3364 | struct xfs_buf **bpp) | |
1da177e4 | 3365 | { |
4c46819a | 3366 | struct xfs_mount *mp = ip->i_mount; |
b1438f47 | 3367 | struct xfs_buf *bp = NULL; |
4c46819a | 3368 | struct xfs_dinode *dip; |
1da177e4 | 3369 | int error; |
1da177e4 | 3370 | |
ff6d6af2 | 3371 | XFS_STATS_INC(mp, xs_iflush_count); |
1da177e4 | 3372 | |
579aa9ca | 3373 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 3374 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 3375 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 3376 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
1da177e4 | 3377 | |
4c46819a | 3378 | *bpp = NULL; |
1da177e4 | 3379 | |
1da177e4 LT |
3380 | xfs_iunpin_wait(ip); |
3381 | ||
4b6a4688 DC |
3382 | /* |
3383 | * For stale inodes we cannot rely on the backing buffer remaining | |
3384 | * stale in cache for the remaining life of the stale inode and so | |
475ee413 | 3385 | * xfs_imap_to_bp() below may give us a buffer that no longer contains |
4b6a4688 DC |
3386 | * inodes below. We have to check this after ensuring the inode is |
3387 | * unpinned so that it is safe to reclaim the stale inode after the | |
3388 | * flush call. | |
3389 | */ | |
3390 | if (xfs_iflags_test(ip, XFS_ISTALE)) { | |
3391 | xfs_ifunlock(ip); | |
3392 | return 0; | |
3393 | } | |
3394 | ||
1da177e4 LT |
3395 | /* |
3396 | * This may have been unpinned because the filesystem is shutting | |
3397 | * down forcibly. If that's the case we must not write this inode | |
32ce90a4 CH |
3398 | * to disk, because the log record didn't make it to disk. |
3399 | * | |
3400 | * We also have to remove the log item from the AIL in this case, | |
3401 | * as we wait for an empty AIL as part of the unmount process. | |
1da177e4 LT |
3402 | */ |
3403 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 3404 | error = -EIO; |
32ce90a4 | 3405 | goto abort_out; |
1da177e4 LT |
3406 | } |
3407 | ||
a3f74ffb | 3408 | /* |
b1438f47 DC |
3409 | * Get the buffer containing the on-disk inode. We are doing a try-lock |
3410 | * operation here, so we may get an EAGAIN error. In that case, we | |
3411 | * simply want to return with the inode still dirty. | |
3412 | * | |
3413 | * If we get any other error, we effectively have a corruption situation | |
3414 | * and we cannot flush the inode, so we treat it the same as failing | |
3415 | * xfs_iflush_int(). | |
a3f74ffb | 3416 | */ |
475ee413 CH |
3417 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, XBF_TRYLOCK, |
3418 | 0); | |
b1438f47 | 3419 | if (error == -EAGAIN) { |
a3f74ffb DC |
3420 | xfs_ifunlock(ip); |
3421 | return error; | |
3422 | } | |
b1438f47 DC |
3423 | if (error) |
3424 | goto corrupt_out; | |
a3f74ffb | 3425 | |
1da177e4 LT |
3426 | /* |
3427 | * First flush out the inode that xfs_iflush was called with. | |
3428 | */ | |
3429 | error = xfs_iflush_int(ip, bp); | |
bad55843 | 3430 | if (error) |
1da177e4 | 3431 | goto corrupt_out; |
1da177e4 | 3432 | |
a3f74ffb DC |
3433 | /* |
3434 | * If the buffer is pinned then push on the log now so we won't | |
3435 | * get stuck waiting in the write for too long. | |
3436 | */ | |
811e64c7 | 3437 | if (xfs_buf_ispinned(bp)) |
a14a348b | 3438 | xfs_log_force(mp, 0); |
a3f74ffb | 3439 | |
1da177e4 LT |
3440 | /* |
3441 | * inode clustering: | |
3442 | * see if other inodes can be gathered into this write | |
3443 | */ | |
bad55843 DC |
3444 | error = xfs_iflush_cluster(ip, bp); |
3445 | if (error) | |
3446 | goto cluster_corrupt_out; | |
1da177e4 | 3447 | |
4c46819a CH |
3448 | *bpp = bp; |
3449 | return 0; | |
1da177e4 LT |
3450 | |
3451 | corrupt_out: | |
b1438f47 DC |
3452 | if (bp) |
3453 | xfs_buf_relse(bp); | |
7d04a335 | 3454 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
1da177e4 | 3455 | cluster_corrupt_out: |
2451337d | 3456 | error = -EFSCORRUPTED; |
32ce90a4 | 3457 | abort_out: |
1da177e4 LT |
3458 | /* |
3459 | * Unlocks the flush lock | |
3460 | */ | |
04913fdd | 3461 | xfs_iflush_abort(ip, false); |
32ce90a4 | 3462 | return error; |
1da177e4 LT |
3463 | } |
3464 | ||
1da177e4 LT |
3465 | STATIC int |
3466 | xfs_iflush_int( | |
93848a99 CH |
3467 | struct xfs_inode *ip, |
3468 | struct xfs_buf *bp) | |
1da177e4 | 3469 | { |
93848a99 CH |
3470 | struct xfs_inode_log_item *iip = ip->i_itemp; |
3471 | struct xfs_dinode *dip; | |
3472 | struct xfs_mount *mp = ip->i_mount; | |
1da177e4 | 3473 | |
579aa9ca | 3474 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 3475 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 3476 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 3477 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
93848a99 | 3478 | ASSERT(iip != NULL && iip->ili_fields != 0); |
263997a6 | 3479 | ASSERT(ip->i_d.di_version > 1); |
1da177e4 | 3480 | |
1da177e4 | 3481 | /* set *dip = inode's place in the buffer */ |
88ee2df7 | 3482 | dip = xfs_buf_offset(bp, ip->i_imap.im_boffset); |
1da177e4 | 3483 | |
69ef921b | 3484 | if (XFS_TEST_ERROR(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC), |
1da177e4 | 3485 | mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { |
6a19d939 DC |
3486 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3487 | "%s: Bad inode %Lu magic number 0x%x, ptr 0x%p", | |
3488 | __func__, ip->i_ino, be16_to_cpu(dip->di_magic), dip); | |
1da177e4 LT |
3489 | goto corrupt_out; |
3490 | } | |
c19b3b05 | 3491 | if (S_ISREG(VFS_I(ip)->i_mode)) { |
1da177e4 LT |
3492 | if (XFS_TEST_ERROR( |
3493 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
3494 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE), | |
3495 | mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) { | |
6a19d939 DC |
3496 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3497 | "%s: Bad regular inode %Lu, ptr 0x%p", | |
3498 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
3499 | goto corrupt_out; |
3500 | } | |
c19b3b05 | 3501 | } else if (S_ISDIR(VFS_I(ip)->i_mode)) { |
1da177e4 LT |
3502 | if (XFS_TEST_ERROR( |
3503 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
3504 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
3505 | (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL), | |
3506 | mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) { | |
6a19d939 DC |
3507 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3508 | "%s: Bad directory inode %Lu, ptr 0x%p", | |
3509 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
3510 | goto corrupt_out; |
3511 | } | |
3512 | } | |
3513 | if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents > | |
3514 | ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5, | |
3515 | XFS_RANDOM_IFLUSH_5)) { | |
6a19d939 DC |
3516 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3517 | "%s: detected corrupt incore inode %Lu, " | |
3518 | "total extents = %d, nblocks = %Ld, ptr 0x%p", | |
3519 | __func__, ip->i_ino, | |
1da177e4 | 3520 | ip->i_d.di_nextents + ip->i_d.di_anextents, |
6a19d939 | 3521 | ip->i_d.di_nblocks, ip); |
1da177e4 LT |
3522 | goto corrupt_out; |
3523 | } | |
3524 | if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize, | |
3525 | mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) { | |
6a19d939 DC |
3526 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3527 | "%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p", | |
3528 | __func__, ip->i_ino, ip->i_d.di_forkoff, ip); | |
1da177e4 LT |
3529 | goto corrupt_out; |
3530 | } | |
e60896d8 | 3531 | |
1da177e4 | 3532 | /* |
263997a6 | 3533 | * Inode item log recovery for v2 inodes are dependent on the |
e60896d8 DC |
3534 | * di_flushiter count for correct sequencing. We bump the flush |
3535 | * iteration count so we can detect flushes which postdate a log record | |
3536 | * during recovery. This is redundant as we now log every change and | |
3537 | * hence this can't happen but we need to still do it to ensure | |
3538 | * backwards compatibility with old kernels that predate logging all | |
3539 | * inode changes. | |
1da177e4 | 3540 | */ |
e60896d8 DC |
3541 | if (ip->i_d.di_version < 3) |
3542 | ip->i_d.di_flushiter++; | |
1da177e4 LT |
3543 | |
3544 | /* | |
3987848c DC |
3545 | * Copy the dirty parts of the inode into the on-disk inode. We always |
3546 | * copy out the core of the inode, because if the inode is dirty at all | |
3547 | * the core must be. | |
1da177e4 | 3548 | */ |
93f958f9 | 3549 | xfs_inode_to_disk(ip, dip, iip->ili_item.li_lsn); |
1da177e4 LT |
3550 | |
3551 | /* Wrap, we never let the log put out DI_MAX_FLUSH */ | |
3552 | if (ip->i_d.di_flushiter == DI_MAX_FLUSH) | |
3553 | ip->i_d.di_flushiter = 0; | |
3554 | ||
fd9fdba6 | 3555 | xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK); |
e4ac967b | 3556 | if (XFS_IFORK_Q(ip)) |
fd9fdba6 | 3557 | xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK); |
1da177e4 LT |
3558 | xfs_inobp_check(mp, bp); |
3559 | ||
3560 | /* | |
f5d8d5c4 CH |
3561 | * We've recorded everything logged in the inode, so we'd like to clear |
3562 | * the ili_fields bits so we don't log and flush things unnecessarily. | |
3563 | * However, we can't stop logging all this information until the data | |
3564 | * we've copied into the disk buffer is written to disk. If we did we | |
3565 | * might overwrite the copy of the inode in the log with all the data | |
3566 | * after re-logging only part of it, and in the face of a crash we | |
3567 | * wouldn't have all the data we need to recover. | |
1da177e4 | 3568 | * |
f5d8d5c4 CH |
3569 | * What we do is move the bits to the ili_last_fields field. When |
3570 | * logging the inode, these bits are moved back to the ili_fields field. | |
3571 | * In the xfs_iflush_done() routine we clear ili_last_fields, since we | |
3572 | * know that the information those bits represent is permanently on | |
3573 | * disk. As long as the flush completes before the inode is logged | |
3574 | * again, then both ili_fields and ili_last_fields will be cleared. | |
1da177e4 | 3575 | * |
f5d8d5c4 CH |
3576 | * We can play with the ili_fields bits here, because the inode lock |
3577 | * must be held exclusively in order to set bits there and the flush | |
3578 | * lock protects the ili_last_fields bits. Set ili_logged so the flush | |
3579 | * done routine can tell whether or not to look in the AIL. Also, store | |
3580 | * the current LSN of the inode so that we can tell whether the item has | |
3581 | * moved in the AIL from xfs_iflush_done(). In order to read the lsn we | |
3582 | * need the AIL lock, because it is a 64 bit value that cannot be read | |
3583 | * atomically. | |
1da177e4 | 3584 | */ |
93848a99 CH |
3585 | iip->ili_last_fields = iip->ili_fields; |
3586 | iip->ili_fields = 0; | |
fc0561ce | 3587 | iip->ili_fsync_fields = 0; |
93848a99 | 3588 | iip->ili_logged = 1; |
1da177e4 | 3589 | |
93848a99 CH |
3590 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
3591 | &iip->ili_item.li_lsn); | |
1da177e4 | 3592 | |
93848a99 CH |
3593 | /* |
3594 | * Attach the function xfs_iflush_done to the inode's | |
3595 | * buffer. This will remove the inode from the AIL | |
3596 | * and unlock the inode's flush lock when the inode is | |
3597 | * completely written to disk. | |
3598 | */ | |
3599 | xfs_buf_attach_iodone(bp, xfs_iflush_done, &iip->ili_item); | |
1da177e4 | 3600 | |
93848a99 CH |
3601 | /* generate the checksum. */ |
3602 | xfs_dinode_calc_crc(mp, dip); | |
1da177e4 | 3603 | |
93848a99 CH |
3604 | ASSERT(bp->b_fspriv != NULL); |
3605 | ASSERT(bp->b_iodone != NULL); | |
1da177e4 LT |
3606 | return 0; |
3607 | ||
3608 | corrupt_out: | |
2451337d | 3609 | return -EFSCORRUPTED; |
1da177e4 | 3610 | } |