Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
40ebd81d RD |
18 | #include <linux/log2.h> |
19 | ||
1da177e4 | 20 | #include "xfs.h" |
a844f451 | 21 | #include "xfs_fs.h" |
70a9883c | 22 | #include "xfs_shared.h" |
239880ef DC |
23 | #include "xfs_format.h" |
24 | #include "xfs_log_format.h" | |
25 | #include "xfs_trans_resv.h" | |
1da177e4 | 26 | #include "xfs_sb.h" |
1da177e4 | 27 | #include "xfs_mount.h" |
3ab78df2 | 28 | #include "xfs_defer.h" |
a4fbe6ab | 29 | #include "xfs_inode.h" |
57062787 | 30 | #include "xfs_da_format.h" |
c24b5dfa | 31 | #include "xfs_da_btree.h" |
c24b5dfa | 32 | #include "xfs_dir2.h" |
a844f451 | 33 | #include "xfs_attr_sf.h" |
c24b5dfa | 34 | #include "xfs_attr.h" |
239880ef DC |
35 | #include "xfs_trans_space.h" |
36 | #include "xfs_trans.h" | |
1da177e4 | 37 | #include "xfs_buf_item.h" |
a844f451 | 38 | #include "xfs_inode_item.h" |
a844f451 NS |
39 | #include "xfs_ialloc.h" |
40 | #include "xfs_bmap.h" | |
68988114 | 41 | #include "xfs_bmap_util.h" |
1da177e4 | 42 | #include "xfs_error.h" |
1da177e4 | 43 | #include "xfs_quota.h" |
2a82b8be | 44 | #include "xfs_filestream.h" |
93848a99 | 45 | #include "xfs_cksum.h" |
0b1b213f | 46 | #include "xfs_trace.h" |
33479e05 | 47 | #include "xfs_icache.h" |
c24b5dfa | 48 | #include "xfs_symlink.h" |
239880ef DC |
49 | #include "xfs_trans_priv.h" |
50 | #include "xfs_log.h" | |
a4fbe6ab | 51 | #include "xfs_bmap_btree.h" |
aa8968f2 | 52 | #include "xfs_reflink.h" |
005c5db8 | 53 | #include "xfs_dir2_priv.h" |
1da177e4 | 54 | |
1da177e4 | 55 | kmem_zone_t *xfs_inode_zone; |
1da177e4 LT |
56 | |
57 | /* | |
8f04c47a | 58 | * Used in xfs_itruncate_extents(). This is the maximum number of extents |
1da177e4 LT |
59 | * freed from a file in a single transaction. |
60 | */ | |
61 | #define XFS_ITRUNC_MAX_EXTENTS 2 | |
62 | ||
54d7b5c1 DC |
63 | STATIC int xfs_iflush_int(struct xfs_inode *, struct xfs_buf *); |
64 | STATIC int xfs_iunlink(struct xfs_trans *, struct xfs_inode *); | |
65 | STATIC int xfs_iunlink_remove(struct xfs_trans *, struct xfs_inode *); | |
ab297431 | 66 | |
2a0ec1d9 DC |
67 | /* |
68 | * helper function to extract extent size hint from inode | |
69 | */ | |
70 | xfs_extlen_t | |
71 | xfs_get_extsz_hint( | |
72 | struct xfs_inode *ip) | |
73 | { | |
74 | if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize) | |
75 | return ip->i_d.di_extsize; | |
76 | if (XFS_IS_REALTIME_INODE(ip)) | |
77 | return ip->i_mount->m_sb.sb_rextsize; | |
78 | return 0; | |
79 | } | |
80 | ||
f7ca3522 DW |
81 | /* |
82 | * Helper function to extract CoW extent size hint from inode. | |
83 | * Between the extent size hint and the CoW extent size hint, we | |
e153aa79 DW |
84 | * return the greater of the two. If the value is zero (automatic), |
85 | * use the default size. | |
f7ca3522 DW |
86 | */ |
87 | xfs_extlen_t | |
88 | xfs_get_cowextsz_hint( | |
89 | struct xfs_inode *ip) | |
90 | { | |
91 | xfs_extlen_t a, b; | |
92 | ||
93 | a = 0; | |
94 | if (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE) | |
95 | a = ip->i_d.di_cowextsize; | |
96 | b = xfs_get_extsz_hint(ip); | |
97 | ||
e153aa79 DW |
98 | a = max(a, b); |
99 | if (a == 0) | |
100 | return XFS_DEFAULT_COWEXTSZ_HINT; | |
101 | return a; | |
f7ca3522 DW |
102 | } |
103 | ||
fa96acad | 104 | /* |
efa70be1 CH |
105 | * These two are wrapper routines around the xfs_ilock() routine used to |
106 | * centralize some grungy code. They are used in places that wish to lock the | |
107 | * inode solely for reading the extents. The reason these places can't just | |
108 | * call xfs_ilock(ip, XFS_ILOCK_SHARED) is that the inode lock also guards to | |
109 | * bringing in of the extents from disk for a file in b-tree format. If the | |
110 | * inode is in b-tree format, then we need to lock the inode exclusively until | |
111 | * the extents are read in. Locking it exclusively all the time would limit | |
112 | * our parallelism unnecessarily, though. What we do instead is check to see | |
113 | * if the extents have been read in yet, and only lock the inode exclusively | |
114 | * if they have not. | |
fa96acad | 115 | * |
efa70be1 | 116 | * The functions return a value which should be given to the corresponding |
01f4f327 | 117 | * xfs_iunlock() call. |
fa96acad DC |
118 | */ |
119 | uint | |
309ecac8 CH |
120 | xfs_ilock_data_map_shared( |
121 | struct xfs_inode *ip) | |
fa96acad | 122 | { |
309ecac8 | 123 | uint lock_mode = XFS_ILOCK_SHARED; |
fa96acad | 124 | |
309ecac8 CH |
125 | if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE && |
126 | (ip->i_df.if_flags & XFS_IFEXTENTS) == 0) | |
fa96acad | 127 | lock_mode = XFS_ILOCK_EXCL; |
fa96acad | 128 | xfs_ilock(ip, lock_mode); |
fa96acad DC |
129 | return lock_mode; |
130 | } | |
131 | ||
efa70be1 CH |
132 | uint |
133 | xfs_ilock_attr_map_shared( | |
134 | struct xfs_inode *ip) | |
fa96acad | 135 | { |
efa70be1 CH |
136 | uint lock_mode = XFS_ILOCK_SHARED; |
137 | ||
138 | if (ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE && | |
139 | (ip->i_afp->if_flags & XFS_IFEXTENTS) == 0) | |
140 | lock_mode = XFS_ILOCK_EXCL; | |
141 | xfs_ilock(ip, lock_mode); | |
142 | return lock_mode; | |
fa96acad DC |
143 | } |
144 | ||
145 | /* | |
65523218 CH |
146 | * In addition to i_rwsem in the VFS inode, the xfs inode contains 2 |
147 | * multi-reader locks: i_mmap_lock and the i_lock. This routine allows | |
148 | * various combinations of the locks to be obtained. | |
fa96acad | 149 | * |
653c60b6 DC |
150 | * The 3 locks should always be ordered so that the IO lock is obtained first, |
151 | * the mmap lock second and the ilock last in order to prevent deadlock. | |
fa96acad | 152 | * |
653c60b6 DC |
153 | * Basic locking order: |
154 | * | |
65523218 | 155 | * i_rwsem -> i_mmap_lock -> page_lock -> i_ilock |
653c60b6 DC |
156 | * |
157 | * mmap_sem locking order: | |
158 | * | |
65523218 | 159 | * i_rwsem -> page lock -> mmap_sem |
653c60b6 DC |
160 | * mmap_sem -> i_mmap_lock -> page_lock |
161 | * | |
162 | * The difference in mmap_sem locking order mean that we cannot hold the | |
163 | * i_mmap_lock over syscall based read(2)/write(2) based IO. These IO paths can | |
164 | * fault in pages during copy in/out (for buffered IO) or require the mmap_sem | |
165 | * in get_user_pages() to map the user pages into the kernel address space for | |
65523218 | 166 | * direct IO. Similarly the i_rwsem cannot be taken inside a page fault because |
653c60b6 DC |
167 | * page faults already hold the mmap_sem. |
168 | * | |
169 | * Hence to serialise fully against both syscall and mmap based IO, we need to | |
65523218 | 170 | * take both the i_rwsem and the i_mmap_lock. These locks should *only* be both |
653c60b6 DC |
171 | * taken in places where we need to invalidate the page cache in a race |
172 | * free manner (e.g. truncate, hole punch and other extent manipulation | |
173 | * functions). | |
fa96acad DC |
174 | */ |
175 | void | |
176 | xfs_ilock( | |
177 | xfs_inode_t *ip, | |
178 | uint lock_flags) | |
179 | { | |
180 | trace_xfs_ilock(ip, lock_flags, _RET_IP_); | |
181 | ||
182 | /* | |
183 | * You can't set both SHARED and EXCL for the same lock, | |
184 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
185 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
186 | */ | |
187 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
188 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
189 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
190 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
191 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
192 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 193 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad | 194 | |
65523218 CH |
195 | if (lock_flags & XFS_IOLOCK_EXCL) { |
196 | down_write_nested(&VFS_I(ip)->i_rwsem, | |
197 | XFS_IOLOCK_DEP(lock_flags)); | |
198 | } else if (lock_flags & XFS_IOLOCK_SHARED) { | |
199 | down_read_nested(&VFS_I(ip)->i_rwsem, | |
200 | XFS_IOLOCK_DEP(lock_flags)); | |
201 | } | |
fa96acad | 202 | |
653c60b6 DC |
203 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
204 | mrupdate_nested(&ip->i_mmaplock, XFS_MMAPLOCK_DEP(lock_flags)); | |
205 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
206 | mraccess_nested(&ip->i_mmaplock, XFS_MMAPLOCK_DEP(lock_flags)); | |
207 | ||
fa96acad DC |
208 | if (lock_flags & XFS_ILOCK_EXCL) |
209 | mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
210 | else if (lock_flags & XFS_ILOCK_SHARED) | |
211 | mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); | |
212 | } | |
213 | ||
214 | /* | |
215 | * This is just like xfs_ilock(), except that the caller | |
216 | * is guaranteed not to sleep. It returns 1 if it gets | |
217 | * the requested locks and 0 otherwise. If the IO lock is | |
218 | * obtained but the inode lock cannot be, then the IO lock | |
219 | * is dropped before returning. | |
220 | * | |
221 | * ip -- the inode being locked | |
222 | * lock_flags -- this parameter indicates the inode's locks to be | |
223 | * to be locked. See the comment for xfs_ilock() for a list | |
224 | * of valid values. | |
225 | */ | |
226 | int | |
227 | xfs_ilock_nowait( | |
228 | xfs_inode_t *ip, | |
229 | uint lock_flags) | |
230 | { | |
231 | trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_); | |
232 | ||
233 | /* | |
234 | * You can't set both SHARED and EXCL for the same lock, | |
235 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
236 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
237 | */ | |
238 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
239 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
240 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
241 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
242 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
243 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 244 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
245 | |
246 | if (lock_flags & XFS_IOLOCK_EXCL) { | |
65523218 | 247 | if (!down_write_trylock(&VFS_I(ip)->i_rwsem)) |
fa96acad DC |
248 | goto out; |
249 | } else if (lock_flags & XFS_IOLOCK_SHARED) { | |
65523218 | 250 | if (!down_read_trylock(&VFS_I(ip)->i_rwsem)) |
fa96acad DC |
251 | goto out; |
252 | } | |
653c60b6 DC |
253 | |
254 | if (lock_flags & XFS_MMAPLOCK_EXCL) { | |
255 | if (!mrtryupdate(&ip->i_mmaplock)) | |
256 | goto out_undo_iolock; | |
257 | } else if (lock_flags & XFS_MMAPLOCK_SHARED) { | |
258 | if (!mrtryaccess(&ip->i_mmaplock)) | |
259 | goto out_undo_iolock; | |
260 | } | |
261 | ||
fa96acad DC |
262 | if (lock_flags & XFS_ILOCK_EXCL) { |
263 | if (!mrtryupdate(&ip->i_lock)) | |
653c60b6 | 264 | goto out_undo_mmaplock; |
fa96acad DC |
265 | } else if (lock_flags & XFS_ILOCK_SHARED) { |
266 | if (!mrtryaccess(&ip->i_lock)) | |
653c60b6 | 267 | goto out_undo_mmaplock; |
fa96acad DC |
268 | } |
269 | return 1; | |
270 | ||
653c60b6 DC |
271 | out_undo_mmaplock: |
272 | if (lock_flags & XFS_MMAPLOCK_EXCL) | |
273 | mrunlock_excl(&ip->i_mmaplock); | |
274 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
275 | mrunlock_shared(&ip->i_mmaplock); | |
276 | out_undo_iolock: | |
fa96acad | 277 | if (lock_flags & XFS_IOLOCK_EXCL) |
65523218 | 278 | up_write(&VFS_I(ip)->i_rwsem); |
fa96acad | 279 | else if (lock_flags & XFS_IOLOCK_SHARED) |
65523218 | 280 | up_read(&VFS_I(ip)->i_rwsem); |
653c60b6 | 281 | out: |
fa96acad DC |
282 | return 0; |
283 | } | |
284 | ||
285 | /* | |
286 | * xfs_iunlock() is used to drop the inode locks acquired with | |
287 | * xfs_ilock() and xfs_ilock_nowait(). The caller must pass | |
288 | * in the flags given to xfs_ilock() or xfs_ilock_nowait() so | |
289 | * that we know which locks to drop. | |
290 | * | |
291 | * ip -- the inode being unlocked | |
292 | * lock_flags -- this parameter indicates the inode's locks to be | |
293 | * to be unlocked. See the comment for xfs_ilock() for a list | |
294 | * of valid values for this parameter. | |
295 | * | |
296 | */ | |
297 | void | |
298 | xfs_iunlock( | |
299 | xfs_inode_t *ip, | |
300 | uint lock_flags) | |
301 | { | |
302 | /* | |
303 | * You can't set both SHARED and EXCL for the same lock, | |
304 | * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, | |
305 | * and XFS_ILOCK_EXCL are valid values to set in lock_flags. | |
306 | */ | |
307 | ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != | |
308 | (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); | |
653c60b6 DC |
309 | ASSERT((lock_flags & (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)) != |
310 | (XFS_MMAPLOCK_SHARED | XFS_MMAPLOCK_EXCL)); | |
fa96acad DC |
311 | ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != |
312 | (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); | |
0952c818 | 313 | ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_SUBCLASS_MASK)) == 0); |
fa96acad DC |
314 | ASSERT(lock_flags != 0); |
315 | ||
316 | if (lock_flags & XFS_IOLOCK_EXCL) | |
65523218 | 317 | up_write(&VFS_I(ip)->i_rwsem); |
fa96acad | 318 | else if (lock_flags & XFS_IOLOCK_SHARED) |
65523218 | 319 | up_read(&VFS_I(ip)->i_rwsem); |
fa96acad | 320 | |
653c60b6 DC |
321 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
322 | mrunlock_excl(&ip->i_mmaplock); | |
323 | else if (lock_flags & XFS_MMAPLOCK_SHARED) | |
324 | mrunlock_shared(&ip->i_mmaplock); | |
325 | ||
fa96acad DC |
326 | if (lock_flags & XFS_ILOCK_EXCL) |
327 | mrunlock_excl(&ip->i_lock); | |
328 | else if (lock_flags & XFS_ILOCK_SHARED) | |
329 | mrunlock_shared(&ip->i_lock); | |
330 | ||
331 | trace_xfs_iunlock(ip, lock_flags, _RET_IP_); | |
332 | } | |
333 | ||
334 | /* | |
335 | * give up write locks. the i/o lock cannot be held nested | |
336 | * if it is being demoted. | |
337 | */ | |
338 | void | |
339 | xfs_ilock_demote( | |
340 | xfs_inode_t *ip, | |
341 | uint lock_flags) | |
342 | { | |
653c60b6 DC |
343 | ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_MMAPLOCK_EXCL|XFS_ILOCK_EXCL)); |
344 | ASSERT((lock_flags & | |
345 | ~(XFS_IOLOCK_EXCL|XFS_MMAPLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); | |
fa96acad DC |
346 | |
347 | if (lock_flags & XFS_ILOCK_EXCL) | |
348 | mrdemote(&ip->i_lock); | |
653c60b6 DC |
349 | if (lock_flags & XFS_MMAPLOCK_EXCL) |
350 | mrdemote(&ip->i_mmaplock); | |
fa96acad | 351 | if (lock_flags & XFS_IOLOCK_EXCL) |
65523218 | 352 | downgrade_write(&VFS_I(ip)->i_rwsem); |
fa96acad DC |
353 | |
354 | trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_); | |
355 | } | |
356 | ||
742ae1e3 | 357 | #if defined(DEBUG) || defined(XFS_WARN) |
fa96acad DC |
358 | int |
359 | xfs_isilocked( | |
360 | xfs_inode_t *ip, | |
361 | uint lock_flags) | |
362 | { | |
363 | if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { | |
364 | if (!(lock_flags & XFS_ILOCK_SHARED)) | |
365 | return !!ip->i_lock.mr_writer; | |
366 | return rwsem_is_locked(&ip->i_lock.mr_lock); | |
367 | } | |
368 | ||
653c60b6 DC |
369 | if (lock_flags & (XFS_MMAPLOCK_EXCL|XFS_MMAPLOCK_SHARED)) { |
370 | if (!(lock_flags & XFS_MMAPLOCK_SHARED)) | |
371 | return !!ip->i_mmaplock.mr_writer; | |
372 | return rwsem_is_locked(&ip->i_mmaplock.mr_lock); | |
373 | } | |
374 | ||
fa96acad DC |
375 | if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { |
376 | if (!(lock_flags & XFS_IOLOCK_SHARED)) | |
65523218 CH |
377 | return !debug_locks || |
378 | lockdep_is_held_type(&VFS_I(ip)->i_rwsem, 0); | |
379 | return rwsem_is_locked(&VFS_I(ip)->i_rwsem); | |
fa96acad DC |
380 | } |
381 | ||
382 | ASSERT(0); | |
383 | return 0; | |
384 | } | |
385 | #endif | |
386 | ||
c24b5dfa DC |
387 | #ifdef DEBUG |
388 | int xfs_locked_n; | |
389 | int xfs_small_retries; | |
390 | int xfs_middle_retries; | |
391 | int xfs_lots_retries; | |
392 | int xfs_lock_delays; | |
393 | #endif | |
394 | ||
b6a9947e DC |
395 | /* |
396 | * xfs_lockdep_subclass_ok() is only used in an ASSERT, so is only called when | |
397 | * DEBUG or XFS_WARN is set. And MAX_LOCKDEP_SUBCLASSES is then only defined | |
398 | * when CONFIG_LOCKDEP is set. Hence the complex define below to avoid build | |
399 | * errors and warnings. | |
400 | */ | |
401 | #if (defined(DEBUG) || defined(XFS_WARN)) && defined(CONFIG_LOCKDEP) | |
3403ccc0 DC |
402 | static bool |
403 | xfs_lockdep_subclass_ok( | |
404 | int subclass) | |
405 | { | |
406 | return subclass < MAX_LOCKDEP_SUBCLASSES; | |
407 | } | |
408 | #else | |
409 | #define xfs_lockdep_subclass_ok(subclass) (true) | |
410 | #endif | |
411 | ||
c24b5dfa | 412 | /* |
653c60b6 | 413 | * Bump the subclass so xfs_lock_inodes() acquires each lock with a different |
0952c818 DC |
414 | * value. This can be called for any type of inode lock combination, including |
415 | * parent locking. Care must be taken to ensure we don't overrun the subclass | |
416 | * storage fields in the class mask we build. | |
c24b5dfa DC |
417 | */ |
418 | static inline int | |
419 | xfs_lock_inumorder(int lock_mode, int subclass) | |
420 | { | |
0952c818 DC |
421 | int class = 0; |
422 | ||
423 | ASSERT(!(lock_mode & (XFS_ILOCK_PARENT | XFS_ILOCK_RTBITMAP | | |
424 | XFS_ILOCK_RTSUM))); | |
3403ccc0 | 425 | ASSERT(xfs_lockdep_subclass_ok(subclass)); |
0952c818 | 426 | |
653c60b6 | 427 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) { |
0952c818 | 428 | ASSERT(subclass <= XFS_IOLOCK_MAX_SUBCLASS); |
0952c818 | 429 | class += subclass << XFS_IOLOCK_SHIFT; |
653c60b6 DC |
430 | } |
431 | ||
432 | if (lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) { | |
0952c818 DC |
433 | ASSERT(subclass <= XFS_MMAPLOCK_MAX_SUBCLASS); |
434 | class += subclass << XFS_MMAPLOCK_SHIFT; | |
653c60b6 DC |
435 | } |
436 | ||
0952c818 DC |
437 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) { |
438 | ASSERT(subclass <= XFS_ILOCK_MAX_SUBCLASS); | |
439 | class += subclass << XFS_ILOCK_SHIFT; | |
440 | } | |
c24b5dfa | 441 | |
0952c818 | 442 | return (lock_mode & ~XFS_LOCK_SUBCLASS_MASK) | class; |
c24b5dfa DC |
443 | } |
444 | ||
445 | /* | |
95afcf5c DC |
446 | * The following routine will lock n inodes in exclusive mode. We assume the |
447 | * caller calls us with the inodes in i_ino order. | |
c24b5dfa | 448 | * |
95afcf5c DC |
449 | * We need to detect deadlock where an inode that we lock is in the AIL and we |
450 | * start waiting for another inode that is locked by a thread in a long running | |
451 | * transaction (such as truncate). This can result in deadlock since the long | |
452 | * running trans might need to wait for the inode we just locked in order to | |
453 | * push the tail and free space in the log. | |
0952c818 DC |
454 | * |
455 | * xfs_lock_inodes() can only be used to lock one type of lock at a time - | |
456 | * the iolock, the mmaplock or the ilock, but not more than one at a time. If we | |
457 | * lock more than one at a time, lockdep will report false positives saying we | |
458 | * have violated locking orders. | |
c24b5dfa | 459 | */ |
0d5a75e9 | 460 | static void |
c24b5dfa DC |
461 | xfs_lock_inodes( |
462 | xfs_inode_t **ips, | |
463 | int inodes, | |
464 | uint lock_mode) | |
465 | { | |
466 | int attempts = 0, i, j, try_lock; | |
467 | xfs_log_item_t *lp; | |
468 | ||
0952c818 DC |
469 | /* |
470 | * Currently supports between 2 and 5 inodes with exclusive locking. We | |
471 | * support an arbitrary depth of locking here, but absolute limits on | |
472 | * inodes depend on the the type of locking and the limits placed by | |
473 | * lockdep annotations in xfs_lock_inumorder. These are all checked by | |
474 | * the asserts. | |
475 | */ | |
95afcf5c | 476 | ASSERT(ips && inodes >= 2 && inodes <= 5); |
0952c818 DC |
477 | ASSERT(lock_mode & (XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL | |
478 | XFS_ILOCK_EXCL)); | |
479 | ASSERT(!(lock_mode & (XFS_IOLOCK_SHARED | XFS_MMAPLOCK_SHARED | | |
480 | XFS_ILOCK_SHARED))); | |
0952c818 DC |
481 | ASSERT(!(lock_mode & XFS_MMAPLOCK_EXCL) || |
482 | inodes <= XFS_MMAPLOCK_MAX_SUBCLASS + 1); | |
483 | ASSERT(!(lock_mode & XFS_ILOCK_EXCL) || | |
484 | inodes <= XFS_ILOCK_MAX_SUBCLASS + 1); | |
485 | ||
486 | if (lock_mode & XFS_IOLOCK_EXCL) { | |
487 | ASSERT(!(lock_mode & (XFS_MMAPLOCK_EXCL | XFS_ILOCK_EXCL))); | |
488 | } else if (lock_mode & XFS_MMAPLOCK_EXCL) | |
489 | ASSERT(!(lock_mode & XFS_ILOCK_EXCL)); | |
c24b5dfa DC |
490 | |
491 | try_lock = 0; | |
492 | i = 0; | |
c24b5dfa DC |
493 | again: |
494 | for (; i < inodes; i++) { | |
495 | ASSERT(ips[i]); | |
496 | ||
95afcf5c | 497 | if (i && (ips[i] == ips[i - 1])) /* Already locked */ |
c24b5dfa DC |
498 | continue; |
499 | ||
500 | /* | |
95afcf5c DC |
501 | * If try_lock is not set yet, make sure all locked inodes are |
502 | * not in the AIL. If any are, set try_lock to be used later. | |
c24b5dfa | 503 | */ |
c24b5dfa DC |
504 | if (!try_lock) { |
505 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
506 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
95afcf5c | 507 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) |
c24b5dfa | 508 | try_lock++; |
c24b5dfa DC |
509 | } |
510 | } | |
511 | ||
512 | /* | |
513 | * If any of the previous locks we have locked is in the AIL, | |
514 | * we must TRY to get the second and subsequent locks. If | |
515 | * we can't get any, we must release all we have | |
516 | * and try again. | |
517 | */ | |
95afcf5c DC |
518 | if (!try_lock) { |
519 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); | |
520 | continue; | |
521 | } | |
522 | ||
523 | /* try_lock means we have an inode locked that is in the AIL. */ | |
524 | ASSERT(i != 0); | |
525 | if (xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) | |
526 | continue; | |
c24b5dfa | 527 | |
95afcf5c DC |
528 | /* |
529 | * Unlock all previous guys and try again. xfs_iunlock will try | |
530 | * to push the tail if the inode is in the AIL. | |
531 | */ | |
532 | attempts++; | |
533 | for (j = i - 1; j >= 0; j--) { | |
c24b5dfa | 534 | /* |
95afcf5c DC |
535 | * Check to see if we've already unlocked this one. Not |
536 | * the first one going back, and the inode ptr is the | |
537 | * same. | |
c24b5dfa | 538 | */ |
95afcf5c DC |
539 | if (j != (i - 1) && ips[j] == ips[j + 1]) |
540 | continue; | |
c24b5dfa | 541 | |
95afcf5c DC |
542 | xfs_iunlock(ips[j], lock_mode); |
543 | } | |
c24b5dfa | 544 | |
95afcf5c DC |
545 | if ((attempts % 5) == 0) { |
546 | delay(1); /* Don't just spin the CPU */ | |
c24b5dfa | 547 | #ifdef DEBUG |
95afcf5c | 548 | xfs_lock_delays++; |
c24b5dfa | 549 | #endif |
c24b5dfa | 550 | } |
95afcf5c DC |
551 | i = 0; |
552 | try_lock = 0; | |
553 | goto again; | |
c24b5dfa DC |
554 | } |
555 | ||
556 | #ifdef DEBUG | |
557 | if (attempts) { | |
558 | if (attempts < 5) xfs_small_retries++; | |
559 | else if (attempts < 100) xfs_middle_retries++; | |
560 | else xfs_lots_retries++; | |
561 | } else { | |
562 | xfs_locked_n++; | |
563 | } | |
564 | #endif | |
565 | } | |
566 | ||
567 | /* | |
653c60b6 DC |
568 | * xfs_lock_two_inodes() can only be used to lock one type of lock at a time - |
569 | * the iolock, the mmaplock or the ilock, but not more than one at a time. If we | |
570 | * lock more than one at a time, lockdep will report false positives saying we | |
571 | * have violated locking orders. | |
c24b5dfa DC |
572 | */ |
573 | void | |
574 | xfs_lock_two_inodes( | |
575 | xfs_inode_t *ip0, | |
576 | xfs_inode_t *ip1, | |
577 | uint lock_mode) | |
578 | { | |
579 | xfs_inode_t *temp; | |
580 | int attempts = 0; | |
581 | xfs_log_item_t *lp; | |
582 | ||
65523218 CH |
583 | ASSERT(!(lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))); |
584 | if (lock_mode & (XFS_MMAPLOCK_SHARED|XFS_MMAPLOCK_EXCL)) | |
653c60b6 DC |
585 | ASSERT(!(lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))); |
586 | ||
c24b5dfa DC |
587 | ASSERT(ip0->i_ino != ip1->i_ino); |
588 | ||
589 | if (ip0->i_ino > ip1->i_ino) { | |
590 | temp = ip0; | |
591 | ip0 = ip1; | |
592 | ip1 = temp; | |
593 | } | |
594 | ||
595 | again: | |
596 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
597 | ||
598 | /* | |
599 | * If the first lock we have locked is in the AIL, we must TRY to get | |
600 | * the second lock. If we can't get it, we must release the first one | |
601 | * and try again. | |
602 | */ | |
603 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
604 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
605 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
606 | xfs_iunlock(ip0, lock_mode); | |
607 | if ((++attempts % 5) == 0) | |
608 | delay(1); /* Don't just spin the CPU */ | |
609 | goto again; | |
610 | } | |
611 | } else { | |
612 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
613 | } | |
614 | } | |
615 | ||
616 | ||
fa96acad DC |
617 | void |
618 | __xfs_iflock( | |
619 | struct xfs_inode *ip) | |
620 | { | |
621 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT); | |
622 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT); | |
623 | ||
624 | do { | |
625 | prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
626 | if (xfs_isiflocked(ip)) | |
627 | io_schedule(); | |
628 | } while (!xfs_iflock_nowait(ip)); | |
629 | ||
630 | finish_wait(wq, &wait.wait); | |
631 | } | |
632 | ||
1da177e4 LT |
633 | STATIC uint |
634 | _xfs_dic2xflags( | |
58f88ca2 DC |
635 | __uint16_t di_flags, |
636 | uint64_t di_flags2, | |
637 | bool has_attr) | |
1da177e4 LT |
638 | { |
639 | uint flags = 0; | |
640 | ||
641 | if (di_flags & XFS_DIFLAG_ANY) { | |
642 | if (di_flags & XFS_DIFLAG_REALTIME) | |
e7b89481 | 643 | flags |= FS_XFLAG_REALTIME; |
1da177e4 | 644 | if (di_flags & XFS_DIFLAG_PREALLOC) |
e7b89481 | 645 | flags |= FS_XFLAG_PREALLOC; |
1da177e4 | 646 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
e7b89481 | 647 | flags |= FS_XFLAG_IMMUTABLE; |
1da177e4 | 648 | if (di_flags & XFS_DIFLAG_APPEND) |
e7b89481 | 649 | flags |= FS_XFLAG_APPEND; |
1da177e4 | 650 | if (di_flags & XFS_DIFLAG_SYNC) |
e7b89481 | 651 | flags |= FS_XFLAG_SYNC; |
1da177e4 | 652 | if (di_flags & XFS_DIFLAG_NOATIME) |
e7b89481 | 653 | flags |= FS_XFLAG_NOATIME; |
1da177e4 | 654 | if (di_flags & XFS_DIFLAG_NODUMP) |
e7b89481 | 655 | flags |= FS_XFLAG_NODUMP; |
1da177e4 | 656 | if (di_flags & XFS_DIFLAG_RTINHERIT) |
e7b89481 | 657 | flags |= FS_XFLAG_RTINHERIT; |
1da177e4 | 658 | if (di_flags & XFS_DIFLAG_PROJINHERIT) |
e7b89481 | 659 | flags |= FS_XFLAG_PROJINHERIT; |
1da177e4 | 660 | if (di_flags & XFS_DIFLAG_NOSYMLINKS) |
e7b89481 | 661 | flags |= FS_XFLAG_NOSYMLINKS; |
dd9f438e | 662 | if (di_flags & XFS_DIFLAG_EXTSIZE) |
e7b89481 | 663 | flags |= FS_XFLAG_EXTSIZE; |
dd9f438e | 664 | if (di_flags & XFS_DIFLAG_EXTSZINHERIT) |
e7b89481 | 665 | flags |= FS_XFLAG_EXTSZINHERIT; |
d3446eac | 666 | if (di_flags & XFS_DIFLAG_NODEFRAG) |
e7b89481 | 667 | flags |= FS_XFLAG_NODEFRAG; |
2a82b8be | 668 | if (di_flags & XFS_DIFLAG_FILESTREAM) |
e7b89481 | 669 | flags |= FS_XFLAG_FILESTREAM; |
1da177e4 LT |
670 | } |
671 | ||
58f88ca2 DC |
672 | if (di_flags2 & XFS_DIFLAG2_ANY) { |
673 | if (di_flags2 & XFS_DIFLAG2_DAX) | |
674 | flags |= FS_XFLAG_DAX; | |
f7ca3522 DW |
675 | if (di_flags2 & XFS_DIFLAG2_COWEXTSIZE) |
676 | flags |= FS_XFLAG_COWEXTSIZE; | |
58f88ca2 DC |
677 | } |
678 | ||
679 | if (has_attr) | |
680 | flags |= FS_XFLAG_HASATTR; | |
681 | ||
1da177e4 LT |
682 | return flags; |
683 | } | |
684 | ||
685 | uint | |
686 | xfs_ip2xflags( | |
58f88ca2 | 687 | struct xfs_inode *ip) |
1da177e4 | 688 | { |
58f88ca2 | 689 | struct xfs_icdinode *dic = &ip->i_d; |
1da177e4 | 690 | |
58f88ca2 | 691 | return _xfs_dic2xflags(dic->di_flags, dic->di_flags2, XFS_IFORK_Q(ip)); |
1da177e4 LT |
692 | } |
693 | ||
c24b5dfa DC |
694 | /* |
695 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
696 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
697 | * ci_name->name will point to a the actual name (caller must free) or | |
698 | * will be set to NULL if an exact match is found. | |
699 | */ | |
700 | int | |
701 | xfs_lookup( | |
702 | xfs_inode_t *dp, | |
703 | struct xfs_name *name, | |
704 | xfs_inode_t **ipp, | |
705 | struct xfs_name *ci_name) | |
706 | { | |
707 | xfs_ino_t inum; | |
708 | int error; | |
c24b5dfa DC |
709 | |
710 | trace_xfs_lookup(dp, name); | |
711 | ||
712 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
2451337d | 713 | return -EIO; |
c24b5dfa | 714 | |
c24b5dfa | 715 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
c24b5dfa | 716 | if (error) |
dbad7c99 | 717 | goto out_unlock; |
c24b5dfa DC |
718 | |
719 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); | |
720 | if (error) | |
721 | goto out_free_name; | |
722 | ||
723 | return 0; | |
724 | ||
725 | out_free_name: | |
726 | if (ci_name) | |
727 | kmem_free(ci_name->name); | |
dbad7c99 | 728 | out_unlock: |
c24b5dfa DC |
729 | *ipp = NULL; |
730 | return error; | |
731 | } | |
732 | ||
1da177e4 LT |
733 | /* |
734 | * Allocate an inode on disk and return a copy of its in-core version. | |
735 | * The in-core inode is locked exclusively. Set mode, nlink, and rdev | |
736 | * appropriately within the inode. The uid and gid for the inode are | |
737 | * set according to the contents of the given cred structure. | |
738 | * | |
739 | * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() | |
cd856db6 CM |
740 | * has a free inode available, call xfs_iget() to obtain the in-core |
741 | * version of the allocated inode. Finally, fill in the inode and | |
742 | * log its initial contents. In this case, ialloc_context would be | |
743 | * set to NULL. | |
1da177e4 | 744 | * |
cd856db6 CM |
745 | * If xfs_dialloc() does not have an available inode, it will replenish |
746 | * its supply by doing an allocation. Since we can only do one | |
747 | * allocation within a transaction without deadlocks, we must commit | |
748 | * the current transaction before returning the inode itself. | |
749 | * In this case, therefore, we will set ialloc_context and return. | |
1da177e4 LT |
750 | * The caller should then commit the current transaction, start a new |
751 | * transaction, and call xfs_ialloc() again to actually get the inode. | |
752 | * | |
753 | * To ensure that some other process does not grab the inode that | |
754 | * was allocated during the first call to xfs_ialloc(), this routine | |
755 | * also returns the [locked] bp pointing to the head of the freelist | |
756 | * as ialloc_context. The caller should hold this buffer across | |
757 | * the commit and pass it back into this routine on the second call. | |
b11f94d5 DC |
758 | * |
759 | * If we are allocating quota inodes, we do not have a parent inode | |
760 | * to attach to or associate with (i.e. pip == NULL) because they | |
761 | * are not linked into the directory structure - they are attached | |
762 | * directly to the superblock - and so have no parent. | |
1da177e4 | 763 | */ |
0d5a75e9 | 764 | static int |
1da177e4 LT |
765 | xfs_ialloc( |
766 | xfs_trans_t *tp, | |
767 | xfs_inode_t *pip, | |
576b1d67 | 768 | umode_t mode, |
31b084ae | 769 | xfs_nlink_t nlink, |
1da177e4 | 770 | xfs_dev_t rdev, |
6743099c | 771 | prid_t prid, |
1da177e4 LT |
772 | int okalloc, |
773 | xfs_buf_t **ialloc_context, | |
1da177e4 LT |
774 | xfs_inode_t **ipp) |
775 | { | |
93848a99 | 776 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 LT |
777 | xfs_ino_t ino; |
778 | xfs_inode_t *ip; | |
1da177e4 LT |
779 | uint flags; |
780 | int error; | |
e076b0f3 | 781 | struct timespec tv; |
3987848c | 782 | struct inode *inode; |
1da177e4 LT |
783 | |
784 | /* | |
785 | * Call the space management code to pick | |
786 | * the on-disk inode to be allocated. | |
787 | */ | |
b11f94d5 | 788 | error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc, |
08358906 | 789 | ialloc_context, &ino); |
bf904248 | 790 | if (error) |
1da177e4 | 791 | return error; |
08358906 | 792 | if (*ialloc_context || ino == NULLFSINO) { |
1da177e4 LT |
793 | *ipp = NULL; |
794 | return 0; | |
795 | } | |
796 | ASSERT(*ialloc_context == NULL); | |
797 | ||
798 | /* | |
799 | * Get the in-core inode with the lock held exclusively. | |
800 | * This is because we're setting fields here we need | |
801 | * to prevent others from looking at until we're done. | |
802 | */ | |
93848a99 | 803 | error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE, |
ec3ba85f | 804 | XFS_ILOCK_EXCL, &ip); |
bf904248 | 805 | if (error) |
1da177e4 | 806 | return error; |
1da177e4 | 807 | ASSERT(ip != NULL); |
3987848c | 808 | inode = VFS_I(ip); |
1da177e4 | 809 | |
263997a6 DC |
810 | /* |
811 | * We always convert v1 inodes to v2 now - we only support filesystems | |
812 | * with >= v2 inode capability, so there is no reason for ever leaving | |
813 | * an inode in v1 format. | |
814 | */ | |
815 | if (ip->i_d.di_version == 1) | |
816 | ip->i_d.di_version = 2; | |
817 | ||
c19b3b05 | 818 | inode->i_mode = mode; |
54d7b5c1 | 819 | set_nlink(inode, nlink); |
7aab1b28 DE |
820 | ip->i_d.di_uid = xfs_kuid_to_uid(current_fsuid()); |
821 | ip->i_d.di_gid = xfs_kgid_to_gid(current_fsgid()); | |
6743099c | 822 | xfs_set_projid(ip, prid); |
1da177e4 | 823 | |
bd186aa9 | 824 | if (pip && XFS_INHERIT_GID(pip)) { |
1da177e4 | 825 | ip->i_d.di_gid = pip->i_d.di_gid; |
c19b3b05 DC |
826 | if ((VFS_I(pip)->i_mode & S_ISGID) && S_ISDIR(mode)) |
827 | inode->i_mode |= S_ISGID; | |
1da177e4 LT |
828 | } |
829 | ||
830 | /* | |
831 | * If the group ID of the new file does not match the effective group | |
832 | * ID or one of the supplementary group IDs, the S_ISGID bit is cleared | |
833 | * (and only if the irix_sgid_inherit compatibility variable is set). | |
834 | */ | |
835 | if ((irix_sgid_inherit) && | |
c19b3b05 DC |
836 | (inode->i_mode & S_ISGID) && |
837 | (!in_group_p(xfs_gid_to_kgid(ip->i_d.di_gid)))) | |
838 | inode->i_mode &= ~S_ISGID; | |
1da177e4 LT |
839 | |
840 | ip->i_d.di_size = 0; | |
841 | ip->i_d.di_nextents = 0; | |
842 | ASSERT(ip->i_d.di_nblocks == 0); | |
dff35fd4 | 843 | |
c2050a45 | 844 | tv = current_time(inode); |
3987848c DC |
845 | inode->i_mtime = tv; |
846 | inode->i_atime = tv; | |
847 | inode->i_ctime = tv; | |
dff35fd4 | 848 | |
1da177e4 LT |
849 | ip->i_d.di_extsize = 0; |
850 | ip->i_d.di_dmevmask = 0; | |
851 | ip->i_d.di_dmstate = 0; | |
852 | ip->i_d.di_flags = 0; | |
93848a99 CH |
853 | |
854 | if (ip->i_d.di_version == 3) { | |
83e06f21 | 855 | inode->i_version = 1; |
93848a99 | 856 | ip->i_d.di_flags2 = 0; |
f7ca3522 | 857 | ip->i_d.di_cowextsize = 0; |
3987848c DC |
858 | ip->i_d.di_crtime.t_sec = (__int32_t)tv.tv_sec; |
859 | ip->i_d.di_crtime.t_nsec = (__int32_t)tv.tv_nsec; | |
93848a99 CH |
860 | } |
861 | ||
862 | ||
1da177e4 LT |
863 | flags = XFS_ILOG_CORE; |
864 | switch (mode & S_IFMT) { | |
865 | case S_IFIFO: | |
866 | case S_IFCHR: | |
867 | case S_IFBLK: | |
868 | case S_IFSOCK: | |
869 | ip->i_d.di_format = XFS_DINODE_FMT_DEV; | |
870 | ip->i_df.if_u2.if_rdev = rdev; | |
871 | ip->i_df.if_flags = 0; | |
872 | flags |= XFS_ILOG_DEV; | |
873 | break; | |
874 | case S_IFREG: | |
875 | case S_IFDIR: | |
b11f94d5 | 876 | if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) { |
58f88ca2 DC |
877 | uint64_t di_flags2 = 0; |
878 | uint di_flags = 0; | |
365ca83d | 879 | |
abbede1b | 880 | if (S_ISDIR(mode)) { |
365ca83d NS |
881 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
882 | di_flags |= XFS_DIFLAG_RTINHERIT; | |
dd9f438e NS |
883 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
884 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; | |
885 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
886 | } | |
9336e3a7 DC |
887 | if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
888 | di_flags |= XFS_DIFLAG_PROJINHERIT; | |
abbede1b | 889 | } else if (S_ISREG(mode)) { |
613d7043 | 890 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
365ca83d | 891 | di_flags |= XFS_DIFLAG_REALTIME; |
dd9f438e NS |
892 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
893 | di_flags |= XFS_DIFLAG_EXTSIZE; | |
894 | ip->i_d.di_extsize = pip->i_d.di_extsize; | |
895 | } | |
1da177e4 LT |
896 | } |
897 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) && | |
898 | xfs_inherit_noatime) | |
365ca83d | 899 | di_flags |= XFS_DIFLAG_NOATIME; |
1da177e4 LT |
900 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) && |
901 | xfs_inherit_nodump) | |
365ca83d | 902 | di_flags |= XFS_DIFLAG_NODUMP; |
1da177e4 LT |
903 | if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) && |
904 | xfs_inherit_sync) | |
365ca83d | 905 | di_flags |= XFS_DIFLAG_SYNC; |
1da177e4 LT |
906 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) && |
907 | xfs_inherit_nosymlinks) | |
365ca83d | 908 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
d3446eac BN |
909 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) && |
910 | xfs_inherit_nodefrag) | |
911 | di_flags |= XFS_DIFLAG_NODEFRAG; | |
2a82b8be DC |
912 | if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM) |
913 | di_flags |= XFS_DIFLAG_FILESTREAM; | |
58f88ca2 DC |
914 | if (pip->i_d.di_flags2 & XFS_DIFLAG2_DAX) |
915 | di_flags2 |= XFS_DIFLAG2_DAX; | |
916 | ||
365ca83d | 917 | ip->i_d.di_flags |= di_flags; |
58f88ca2 | 918 | ip->i_d.di_flags2 |= di_flags2; |
1da177e4 | 919 | } |
f7ca3522 DW |
920 | if (pip && |
921 | (pip->i_d.di_flags2 & XFS_DIFLAG2_ANY) && | |
922 | pip->i_d.di_version == 3 && | |
923 | ip->i_d.di_version == 3) { | |
924 | if (pip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE) { | |
925 | ip->i_d.di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; | |
926 | ip->i_d.di_cowextsize = pip->i_d.di_cowextsize; | |
927 | } | |
928 | } | |
1da177e4 LT |
929 | /* FALLTHROUGH */ |
930 | case S_IFLNK: | |
931 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; | |
932 | ip->i_df.if_flags = XFS_IFEXTENTS; | |
933 | ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0; | |
934 | ip->i_df.if_u1.if_extents = NULL; | |
935 | break; | |
936 | default: | |
937 | ASSERT(0); | |
938 | } | |
939 | /* | |
940 | * Attribute fork settings for new inode. | |
941 | */ | |
942 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
943 | ip->i_d.di_anextents = 0; | |
944 | ||
945 | /* | |
946 | * Log the new values stuffed into the inode. | |
947 | */ | |
ddc3415a | 948 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
949 | xfs_trans_log_inode(tp, ip, flags); |
950 | ||
58c90473 | 951 | /* now that we have an i_mode we can setup the inode structure */ |
41be8bed | 952 | xfs_setup_inode(ip); |
1da177e4 LT |
953 | |
954 | *ipp = ip; | |
955 | return 0; | |
956 | } | |
957 | ||
e546cb79 DC |
958 | /* |
959 | * Allocates a new inode from disk and return a pointer to the | |
960 | * incore copy. This routine will internally commit the current | |
961 | * transaction and allocate a new one if the Space Manager needed | |
962 | * to do an allocation to replenish the inode free-list. | |
963 | * | |
964 | * This routine is designed to be called from xfs_create and | |
965 | * xfs_create_dir. | |
966 | * | |
967 | */ | |
968 | int | |
969 | xfs_dir_ialloc( | |
970 | xfs_trans_t **tpp, /* input: current transaction; | |
971 | output: may be a new transaction. */ | |
972 | xfs_inode_t *dp, /* directory within whose allocate | |
973 | the inode. */ | |
974 | umode_t mode, | |
975 | xfs_nlink_t nlink, | |
976 | xfs_dev_t rdev, | |
977 | prid_t prid, /* project id */ | |
978 | int okalloc, /* ok to allocate new space */ | |
979 | xfs_inode_t **ipp, /* pointer to inode; it will be | |
980 | locked. */ | |
981 | int *committed) | |
982 | ||
983 | { | |
984 | xfs_trans_t *tp; | |
e546cb79 DC |
985 | xfs_inode_t *ip; |
986 | xfs_buf_t *ialloc_context = NULL; | |
987 | int code; | |
e546cb79 DC |
988 | void *dqinfo; |
989 | uint tflags; | |
990 | ||
991 | tp = *tpp; | |
992 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
993 | ||
994 | /* | |
995 | * xfs_ialloc will return a pointer to an incore inode if | |
996 | * the Space Manager has an available inode on the free | |
997 | * list. Otherwise, it will do an allocation and replenish | |
998 | * the freelist. Since we can only do one allocation per | |
999 | * transaction without deadlocks, we will need to commit the | |
1000 | * current transaction and start a new one. We will then | |
1001 | * need to call xfs_ialloc again to get the inode. | |
1002 | * | |
1003 | * If xfs_ialloc did an allocation to replenish the freelist, | |
1004 | * it returns the bp containing the head of the freelist as | |
1005 | * ialloc_context. We will hold a lock on it across the | |
1006 | * transaction commit so that no other process can steal | |
1007 | * the inode(s) that we've just allocated. | |
1008 | */ | |
1009 | code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, okalloc, | |
1010 | &ialloc_context, &ip); | |
1011 | ||
1012 | /* | |
1013 | * Return an error if we were unable to allocate a new inode. | |
1014 | * This should only happen if we run out of space on disk or | |
1015 | * encounter a disk error. | |
1016 | */ | |
1017 | if (code) { | |
1018 | *ipp = NULL; | |
1019 | return code; | |
1020 | } | |
1021 | if (!ialloc_context && !ip) { | |
1022 | *ipp = NULL; | |
2451337d | 1023 | return -ENOSPC; |
e546cb79 DC |
1024 | } |
1025 | ||
1026 | /* | |
1027 | * If the AGI buffer is non-NULL, then we were unable to get an | |
1028 | * inode in one operation. We need to commit the current | |
1029 | * transaction and call xfs_ialloc() again. It is guaranteed | |
1030 | * to succeed the second time. | |
1031 | */ | |
1032 | if (ialloc_context) { | |
1033 | /* | |
1034 | * Normally, xfs_trans_commit releases all the locks. | |
1035 | * We call bhold to hang on to the ialloc_context across | |
1036 | * the commit. Holding this buffer prevents any other | |
1037 | * processes from doing any allocations in this | |
1038 | * allocation group. | |
1039 | */ | |
1040 | xfs_trans_bhold(tp, ialloc_context); | |
e546cb79 DC |
1041 | |
1042 | /* | |
1043 | * We want the quota changes to be associated with the next | |
1044 | * transaction, NOT this one. So, detach the dqinfo from this | |
1045 | * and attach it to the next transaction. | |
1046 | */ | |
1047 | dqinfo = NULL; | |
1048 | tflags = 0; | |
1049 | if (tp->t_dqinfo) { | |
1050 | dqinfo = (void *)tp->t_dqinfo; | |
1051 | tp->t_dqinfo = NULL; | |
1052 | tflags = tp->t_flags & XFS_TRANS_DQ_DIRTY; | |
1053 | tp->t_flags &= ~(XFS_TRANS_DQ_DIRTY); | |
1054 | } | |
1055 | ||
6e3e6d55 | 1056 | code = xfs_trans_roll(&tp, NULL); |
2e6db6c4 | 1057 | if (committed != NULL) |
e546cb79 | 1058 | *committed = 1; |
3d3c8b52 | 1059 | |
e546cb79 DC |
1060 | /* |
1061 | * Re-attach the quota info that we detached from prev trx. | |
1062 | */ | |
1063 | if (dqinfo) { | |
1064 | tp->t_dqinfo = dqinfo; | |
1065 | tp->t_flags |= tflags; | |
1066 | } | |
1067 | ||
1068 | if (code) { | |
1069 | xfs_buf_relse(ialloc_context); | |
2e6db6c4 | 1070 | *tpp = tp; |
e546cb79 DC |
1071 | *ipp = NULL; |
1072 | return code; | |
1073 | } | |
1074 | xfs_trans_bjoin(tp, ialloc_context); | |
1075 | ||
1076 | /* | |
1077 | * Call ialloc again. Since we've locked out all | |
1078 | * other allocations in this allocation group, | |
1079 | * this call should always succeed. | |
1080 | */ | |
1081 | code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, | |
1082 | okalloc, &ialloc_context, &ip); | |
1083 | ||
1084 | /* | |
1085 | * If we get an error at this point, return to the caller | |
1086 | * so that the current transaction can be aborted. | |
1087 | */ | |
1088 | if (code) { | |
1089 | *tpp = tp; | |
1090 | *ipp = NULL; | |
1091 | return code; | |
1092 | } | |
1093 | ASSERT(!ialloc_context && ip); | |
1094 | ||
1095 | } else { | |
1096 | if (committed != NULL) | |
1097 | *committed = 0; | |
1098 | } | |
1099 | ||
1100 | *ipp = ip; | |
1101 | *tpp = tp; | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | /* | |
54d7b5c1 DC |
1107 | * Decrement the link count on an inode & log the change. If this causes the |
1108 | * link count to go to zero, move the inode to AGI unlinked list so that it can | |
1109 | * be freed when the last active reference goes away via xfs_inactive(). | |
e546cb79 | 1110 | */ |
0d5a75e9 | 1111 | static int /* error */ |
e546cb79 DC |
1112 | xfs_droplink( |
1113 | xfs_trans_t *tp, | |
1114 | xfs_inode_t *ip) | |
1115 | { | |
e546cb79 DC |
1116 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
1117 | ||
e546cb79 DC |
1118 | drop_nlink(VFS_I(ip)); |
1119 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1120 | ||
54d7b5c1 DC |
1121 | if (VFS_I(ip)->i_nlink) |
1122 | return 0; | |
1123 | ||
1124 | return xfs_iunlink(tp, ip); | |
e546cb79 DC |
1125 | } |
1126 | ||
e546cb79 DC |
1127 | /* |
1128 | * Increment the link count on an inode & log the change. | |
1129 | */ | |
0d5a75e9 | 1130 | static int |
e546cb79 DC |
1131 | xfs_bumplink( |
1132 | xfs_trans_t *tp, | |
1133 | xfs_inode_t *ip) | |
1134 | { | |
1135 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); | |
1136 | ||
263997a6 | 1137 | ASSERT(ip->i_d.di_version > 1); |
e546cb79 | 1138 | inc_nlink(VFS_I(ip)); |
e546cb79 DC |
1139 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1140 | return 0; | |
1141 | } | |
1142 | ||
c24b5dfa DC |
1143 | int |
1144 | xfs_create( | |
1145 | xfs_inode_t *dp, | |
1146 | struct xfs_name *name, | |
1147 | umode_t mode, | |
1148 | xfs_dev_t rdev, | |
1149 | xfs_inode_t **ipp) | |
1150 | { | |
1151 | int is_dir = S_ISDIR(mode); | |
1152 | struct xfs_mount *mp = dp->i_mount; | |
1153 | struct xfs_inode *ip = NULL; | |
1154 | struct xfs_trans *tp = NULL; | |
1155 | int error; | |
2c3234d1 | 1156 | struct xfs_defer_ops dfops; |
c24b5dfa DC |
1157 | xfs_fsblock_t first_block; |
1158 | bool unlock_dp_on_error = false; | |
c24b5dfa DC |
1159 | prid_t prid; |
1160 | struct xfs_dquot *udqp = NULL; | |
1161 | struct xfs_dquot *gdqp = NULL; | |
1162 | struct xfs_dquot *pdqp = NULL; | |
062647a8 | 1163 | struct xfs_trans_res *tres; |
c24b5dfa | 1164 | uint resblks; |
c24b5dfa DC |
1165 | |
1166 | trace_xfs_create(dp, name); | |
1167 | ||
1168 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1169 | return -EIO; |
c24b5dfa | 1170 | |
163467d3 | 1171 | prid = xfs_get_initial_prid(dp); |
c24b5dfa DC |
1172 | |
1173 | /* | |
1174 | * Make sure that we have allocated dquot(s) on disk. | |
1175 | */ | |
7aab1b28 DE |
1176 | error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()), |
1177 | xfs_kgid_to_gid(current_fsgid()), prid, | |
c24b5dfa DC |
1178 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, |
1179 | &udqp, &gdqp, &pdqp); | |
1180 | if (error) | |
1181 | return error; | |
1182 | ||
1183 | if (is_dir) { | |
1184 | rdev = 0; | |
1185 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
062647a8 | 1186 | tres = &M_RES(mp)->tr_mkdir; |
c24b5dfa DC |
1187 | } else { |
1188 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
062647a8 | 1189 | tres = &M_RES(mp)->tr_create; |
c24b5dfa DC |
1190 | } |
1191 | ||
c24b5dfa DC |
1192 | /* |
1193 | * Initially assume that the file does not exist and | |
1194 | * reserve the resources for that case. If that is not | |
1195 | * the case we'll drop the one we have and get a more | |
1196 | * appropriate transaction later. | |
1197 | */ | |
253f4911 | 1198 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); |
2451337d | 1199 | if (error == -ENOSPC) { |
c24b5dfa DC |
1200 | /* flush outstanding delalloc blocks and retry */ |
1201 | xfs_flush_inodes(mp); | |
253f4911 | 1202 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); |
c24b5dfa | 1203 | } |
2451337d | 1204 | if (error == -ENOSPC) { |
c24b5dfa DC |
1205 | /* No space at all so try a "no-allocation" reservation */ |
1206 | resblks = 0; | |
253f4911 | 1207 | error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp); |
c24b5dfa | 1208 | } |
4906e215 | 1209 | if (error) |
253f4911 | 1210 | goto out_release_inode; |
c24b5dfa | 1211 | |
65523218 | 1212 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
c24b5dfa DC |
1213 | unlock_dp_on_error = true; |
1214 | ||
2c3234d1 | 1215 | xfs_defer_init(&dfops, &first_block); |
c24b5dfa DC |
1216 | |
1217 | /* | |
1218 | * Reserve disk quota and the inode. | |
1219 | */ | |
1220 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, | |
1221 | pdqp, resblks, 1, 0); | |
1222 | if (error) | |
1223 | goto out_trans_cancel; | |
1224 | ||
94f3cad5 ES |
1225 | if (!resblks) { |
1226 | error = xfs_dir_canenter(tp, dp, name); | |
1227 | if (error) | |
1228 | goto out_trans_cancel; | |
1229 | } | |
c24b5dfa DC |
1230 | |
1231 | /* | |
1232 | * A newly created regular or special file just has one directory | |
1233 | * entry pointing to them, but a directory also the "." entry | |
1234 | * pointing to itself. | |
1235 | */ | |
1236 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, | |
f6106efa | 1237 | prid, resblks > 0, &ip, NULL); |
d6077aa3 | 1238 | if (error) |
4906e215 | 1239 | goto out_trans_cancel; |
c24b5dfa DC |
1240 | |
1241 | /* | |
1242 | * Now we join the directory inode to the transaction. We do not do it | |
1243 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1244 | * (and release all the locks). An error from here on will result in | |
1245 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1246 | * error path. | |
1247 | */ | |
65523218 | 1248 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
1249 | unlock_dp_on_error = false; |
1250 | ||
1251 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, | |
2c3234d1 | 1252 | &first_block, &dfops, resblks ? |
c24b5dfa DC |
1253 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
1254 | if (error) { | |
2451337d | 1255 | ASSERT(error != -ENOSPC); |
4906e215 | 1256 | goto out_trans_cancel; |
c24b5dfa DC |
1257 | } |
1258 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1259 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1260 | ||
1261 | if (is_dir) { | |
1262 | error = xfs_dir_init(tp, ip, dp); | |
1263 | if (error) | |
1264 | goto out_bmap_cancel; | |
1265 | ||
1266 | error = xfs_bumplink(tp, dp); | |
1267 | if (error) | |
1268 | goto out_bmap_cancel; | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * If this is a synchronous mount, make sure that the | |
1273 | * create transaction goes to disk before returning to | |
1274 | * the user. | |
1275 | */ | |
1276 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
1277 | xfs_trans_set_sync(tp); | |
1278 | ||
1279 | /* | |
1280 | * Attach the dquot(s) to the inodes and modify them incore. | |
1281 | * These ids of the inode couldn't have changed since the new | |
1282 | * inode has been locked ever since it was created. | |
1283 | */ | |
1284 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); | |
1285 | ||
2c3234d1 | 1286 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa DC |
1287 | if (error) |
1288 | goto out_bmap_cancel; | |
1289 | ||
70393313 | 1290 | error = xfs_trans_commit(tp); |
c24b5dfa DC |
1291 | if (error) |
1292 | goto out_release_inode; | |
1293 | ||
1294 | xfs_qm_dqrele(udqp); | |
1295 | xfs_qm_dqrele(gdqp); | |
1296 | xfs_qm_dqrele(pdqp); | |
1297 | ||
1298 | *ipp = ip; | |
1299 | return 0; | |
1300 | ||
1301 | out_bmap_cancel: | |
2c3234d1 | 1302 | xfs_defer_cancel(&dfops); |
c24b5dfa | 1303 | out_trans_cancel: |
4906e215 | 1304 | xfs_trans_cancel(tp); |
c24b5dfa DC |
1305 | out_release_inode: |
1306 | /* | |
58c90473 DC |
1307 | * Wait until after the current transaction is aborted to finish the |
1308 | * setup of the inode and release the inode. This prevents recursive | |
1309 | * transactions and deadlocks from xfs_inactive. | |
c24b5dfa | 1310 | */ |
58c90473 DC |
1311 | if (ip) { |
1312 | xfs_finish_inode_setup(ip); | |
c24b5dfa | 1313 | IRELE(ip); |
58c90473 | 1314 | } |
c24b5dfa DC |
1315 | |
1316 | xfs_qm_dqrele(udqp); | |
1317 | xfs_qm_dqrele(gdqp); | |
1318 | xfs_qm_dqrele(pdqp); | |
1319 | ||
1320 | if (unlock_dp_on_error) | |
65523218 | 1321 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
1322 | return error; |
1323 | } | |
1324 | ||
99b6436b ZYW |
1325 | int |
1326 | xfs_create_tmpfile( | |
1327 | struct xfs_inode *dp, | |
1328 | struct dentry *dentry, | |
330033d6 BF |
1329 | umode_t mode, |
1330 | struct xfs_inode **ipp) | |
99b6436b ZYW |
1331 | { |
1332 | struct xfs_mount *mp = dp->i_mount; | |
1333 | struct xfs_inode *ip = NULL; | |
1334 | struct xfs_trans *tp = NULL; | |
1335 | int error; | |
99b6436b ZYW |
1336 | prid_t prid; |
1337 | struct xfs_dquot *udqp = NULL; | |
1338 | struct xfs_dquot *gdqp = NULL; | |
1339 | struct xfs_dquot *pdqp = NULL; | |
1340 | struct xfs_trans_res *tres; | |
1341 | uint resblks; | |
1342 | ||
1343 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1344 | return -EIO; |
99b6436b ZYW |
1345 | |
1346 | prid = xfs_get_initial_prid(dp); | |
1347 | ||
1348 | /* | |
1349 | * Make sure that we have allocated dquot(s) on disk. | |
1350 | */ | |
1351 | error = xfs_qm_vop_dqalloc(dp, xfs_kuid_to_uid(current_fsuid()), | |
1352 | xfs_kgid_to_gid(current_fsgid()), prid, | |
1353 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
1354 | &udqp, &gdqp, &pdqp); | |
1355 | if (error) | |
1356 | return error; | |
1357 | ||
1358 | resblks = XFS_IALLOC_SPACE_RES(mp); | |
99b6436b | 1359 | tres = &M_RES(mp)->tr_create_tmpfile; |
253f4911 CH |
1360 | |
1361 | error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp); | |
2451337d | 1362 | if (error == -ENOSPC) { |
99b6436b ZYW |
1363 | /* No space at all so try a "no-allocation" reservation */ |
1364 | resblks = 0; | |
253f4911 | 1365 | error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp); |
99b6436b | 1366 | } |
4906e215 | 1367 | if (error) |
253f4911 | 1368 | goto out_release_inode; |
99b6436b ZYW |
1369 | |
1370 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, | |
1371 | pdqp, resblks, 1, 0); | |
1372 | if (error) | |
1373 | goto out_trans_cancel; | |
1374 | ||
1375 | error = xfs_dir_ialloc(&tp, dp, mode, 1, 0, | |
1376 | prid, resblks > 0, &ip, NULL); | |
d6077aa3 | 1377 | if (error) |
4906e215 | 1378 | goto out_trans_cancel; |
99b6436b ZYW |
1379 | |
1380 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
1381 | xfs_trans_set_sync(tp); | |
1382 | ||
1383 | /* | |
1384 | * Attach the dquot(s) to the inodes and modify them incore. | |
1385 | * These ids of the inode couldn't have changed since the new | |
1386 | * inode has been locked ever since it was created. | |
1387 | */ | |
1388 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); | |
1389 | ||
99b6436b ZYW |
1390 | error = xfs_iunlink(tp, ip); |
1391 | if (error) | |
4906e215 | 1392 | goto out_trans_cancel; |
99b6436b | 1393 | |
70393313 | 1394 | error = xfs_trans_commit(tp); |
99b6436b ZYW |
1395 | if (error) |
1396 | goto out_release_inode; | |
1397 | ||
1398 | xfs_qm_dqrele(udqp); | |
1399 | xfs_qm_dqrele(gdqp); | |
1400 | xfs_qm_dqrele(pdqp); | |
1401 | ||
330033d6 | 1402 | *ipp = ip; |
99b6436b ZYW |
1403 | return 0; |
1404 | ||
99b6436b | 1405 | out_trans_cancel: |
4906e215 | 1406 | xfs_trans_cancel(tp); |
99b6436b ZYW |
1407 | out_release_inode: |
1408 | /* | |
58c90473 DC |
1409 | * Wait until after the current transaction is aborted to finish the |
1410 | * setup of the inode and release the inode. This prevents recursive | |
1411 | * transactions and deadlocks from xfs_inactive. | |
99b6436b | 1412 | */ |
58c90473 DC |
1413 | if (ip) { |
1414 | xfs_finish_inode_setup(ip); | |
99b6436b | 1415 | IRELE(ip); |
58c90473 | 1416 | } |
99b6436b ZYW |
1417 | |
1418 | xfs_qm_dqrele(udqp); | |
1419 | xfs_qm_dqrele(gdqp); | |
1420 | xfs_qm_dqrele(pdqp); | |
1421 | ||
1422 | return error; | |
1423 | } | |
1424 | ||
c24b5dfa DC |
1425 | int |
1426 | xfs_link( | |
1427 | xfs_inode_t *tdp, | |
1428 | xfs_inode_t *sip, | |
1429 | struct xfs_name *target_name) | |
1430 | { | |
1431 | xfs_mount_t *mp = tdp->i_mount; | |
1432 | xfs_trans_t *tp; | |
1433 | int error; | |
2c3234d1 | 1434 | struct xfs_defer_ops dfops; |
c24b5dfa | 1435 | xfs_fsblock_t first_block; |
c24b5dfa DC |
1436 | int resblks; |
1437 | ||
1438 | trace_xfs_link(tdp, target_name); | |
1439 | ||
c19b3b05 | 1440 | ASSERT(!S_ISDIR(VFS_I(sip)->i_mode)); |
c24b5dfa DC |
1441 | |
1442 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 1443 | return -EIO; |
c24b5dfa DC |
1444 | |
1445 | error = xfs_qm_dqattach(sip, 0); | |
1446 | if (error) | |
1447 | goto std_return; | |
1448 | ||
1449 | error = xfs_qm_dqattach(tdp, 0); | |
1450 | if (error) | |
1451 | goto std_return; | |
1452 | ||
c24b5dfa | 1453 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
253f4911 | 1454 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, resblks, 0, 0, &tp); |
2451337d | 1455 | if (error == -ENOSPC) { |
c24b5dfa | 1456 | resblks = 0; |
253f4911 | 1457 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, 0, 0, 0, &tp); |
c24b5dfa | 1458 | } |
4906e215 | 1459 | if (error) |
253f4911 | 1460 | goto std_return; |
c24b5dfa DC |
1461 | |
1462 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); | |
1463 | ||
1464 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); | |
65523218 | 1465 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
1466 | |
1467 | /* | |
1468 | * If we are using project inheritance, we only allow hard link | |
1469 | * creation in our tree when the project IDs are the same; else | |
1470 | * the tree quota mechanism could be circumvented. | |
1471 | */ | |
1472 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
1473 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { | |
2451337d | 1474 | error = -EXDEV; |
c24b5dfa DC |
1475 | goto error_return; |
1476 | } | |
1477 | ||
94f3cad5 ES |
1478 | if (!resblks) { |
1479 | error = xfs_dir_canenter(tp, tdp, target_name); | |
1480 | if (error) | |
1481 | goto error_return; | |
1482 | } | |
c24b5dfa | 1483 | |
2c3234d1 | 1484 | xfs_defer_init(&dfops, &first_block); |
c24b5dfa | 1485 | |
54d7b5c1 DC |
1486 | /* |
1487 | * Handle initial link state of O_TMPFILE inode | |
1488 | */ | |
1489 | if (VFS_I(sip)->i_nlink == 0) { | |
ab297431 ZYW |
1490 | error = xfs_iunlink_remove(tp, sip); |
1491 | if (error) | |
4906e215 | 1492 | goto error_return; |
ab297431 ZYW |
1493 | } |
1494 | ||
c24b5dfa | 1495 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2c3234d1 | 1496 | &first_block, &dfops, resblks); |
c24b5dfa | 1497 | if (error) |
4906e215 | 1498 | goto error_return; |
c24b5dfa DC |
1499 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1500 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); | |
1501 | ||
1502 | error = xfs_bumplink(tp, sip); | |
1503 | if (error) | |
4906e215 | 1504 | goto error_return; |
c24b5dfa DC |
1505 | |
1506 | /* | |
1507 | * If this is a synchronous mount, make sure that the | |
1508 | * link transaction goes to disk before returning to | |
1509 | * the user. | |
1510 | */ | |
f6106efa | 1511 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
c24b5dfa | 1512 | xfs_trans_set_sync(tp); |
c24b5dfa | 1513 | |
2c3234d1 | 1514 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa | 1515 | if (error) { |
2c3234d1 | 1516 | xfs_defer_cancel(&dfops); |
4906e215 | 1517 | goto error_return; |
c24b5dfa DC |
1518 | } |
1519 | ||
70393313 | 1520 | return xfs_trans_commit(tp); |
c24b5dfa | 1521 | |
c24b5dfa | 1522 | error_return: |
4906e215 | 1523 | xfs_trans_cancel(tp); |
c24b5dfa DC |
1524 | std_return: |
1525 | return error; | |
1526 | } | |
1527 | ||
1da177e4 | 1528 | /* |
8f04c47a CH |
1529 | * Free up the underlying blocks past new_size. The new size must be smaller |
1530 | * than the current size. This routine can be used both for the attribute and | |
1531 | * data fork, and does not modify the inode size, which is left to the caller. | |
1da177e4 | 1532 | * |
f6485057 DC |
1533 | * The transaction passed to this routine must have made a permanent log |
1534 | * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the | |
1535 | * given transaction and start new ones, so make sure everything involved in | |
1536 | * the transaction is tidy before calling here. Some transaction will be | |
1537 | * returned to the caller to be committed. The incoming transaction must | |
1538 | * already include the inode, and both inode locks must be held exclusively. | |
1539 | * The inode must also be "held" within the transaction. On return the inode | |
1540 | * will be "held" within the returned transaction. This routine does NOT | |
1541 | * require any disk space to be reserved for it within the transaction. | |
1da177e4 | 1542 | * |
f6485057 DC |
1543 | * If we get an error, we must return with the inode locked and linked into the |
1544 | * current transaction. This keeps things simple for the higher level code, | |
1545 | * because it always knows that the inode is locked and held in the transaction | |
1546 | * that returns to it whether errors occur or not. We don't mark the inode | |
1547 | * dirty on error so that transactions can be easily aborted if possible. | |
1da177e4 LT |
1548 | */ |
1549 | int | |
8f04c47a CH |
1550 | xfs_itruncate_extents( |
1551 | struct xfs_trans **tpp, | |
1552 | struct xfs_inode *ip, | |
1553 | int whichfork, | |
1554 | xfs_fsize_t new_size) | |
1da177e4 | 1555 | { |
8f04c47a CH |
1556 | struct xfs_mount *mp = ip->i_mount; |
1557 | struct xfs_trans *tp = *tpp; | |
2c3234d1 | 1558 | struct xfs_defer_ops dfops; |
8f04c47a CH |
1559 | xfs_fsblock_t first_block; |
1560 | xfs_fileoff_t first_unmap_block; | |
1561 | xfs_fileoff_t last_block; | |
1562 | xfs_filblks_t unmap_len; | |
8f04c47a CH |
1563 | int error = 0; |
1564 | int done = 0; | |
1da177e4 | 1565 | |
0b56185b CH |
1566 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1567 | ASSERT(!atomic_read(&VFS_I(ip)->i_count) || | |
1568 | xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
ce7ae151 | 1569 | ASSERT(new_size <= XFS_ISIZE(ip)); |
8f04c47a | 1570 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); |
1da177e4 | 1571 | ASSERT(ip->i_itemp != NULL); |
898621d5 | 1572 | ASSERT(ip->i_itemp->ili_lock_flags == 0); |
8f04c47a | 1573 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); |
1da177e4 | 1574 | |
673e8e59 CH |
1575 | trace_xfs_itruncate_extents_start(ip, new_size); |
1576 | ||
1da177e4 LT |
1577 | /* |
1578 | * Since it is possible for space to become allocated beyond | |
1579 | * the end of the file (in a crash where the space is allocated | |
1580 | * but the inode size is not yet updated), simply remove any | |
1581 | * blocks which show up between the new EOF and the maximum | |
1582 | * possible file size. If the first block to be removed is | |
1583 | * beyond the maximum file size (ie it is the same as last_block), | |
1584 | * then there is nothing to do. | |
1585 | */ | |
8f04c47a | 1586 | first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
32972383 | 1587 | last_block = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
8f04c47a CH |
1588 | if (first_unmap_block == last_block) |
1589 | return 0; | |
1590 | ||
1591 | ASSERT(first_unmap_block < last_block); | |
1592 | unmap_len = last_block - first_unmap_block + 1; | |
1da177e4 | 1593 | while (!done) { |
2c3234d1 | 1594 | xfs_defer_init(&dfops, &first_block); |
8f04c47a | 1595 | error = xfs_bunmapi(tp, ip, |
3e57ecf6 | 1596 | first_unmap_block, unmap_len, |
8f04c47a | 1597 | xfs_bmapi_aflag(whichfork), |
1da177e4 | 1598 | XFS_ITRUNC_MAX_EXTENTS, |
2c3234d1 | 1599 | &first_block, &dfops, |
b4e9181e | 1600 | &done); |
8f04c47a CH |
1601 | if (error) |
1602 | goto out_bmap_cancel; | |
1da177e4 LT |
1603 | |
1604 | /* | |
1605 | * Duplicate the transaction that has the permanent | |
1606 | * reservation and commit the old transaction. | |
1607 | */ | |
2c3234d1 | 1608 | error = xfs_defer_finish(&tp, &dfops, ip); |
8f04c47a CH |
1609 | if (error) |
1610 | goto out_bmap_cancel; | |
1da177e4 | 1611 | |
2e6db6c4 | 1612 | error = xfs_trans_roll(&tp, ip); |
f6485057 | 1613 | if (error) |
8f04c47a | 1614 | goto out; |
1da177e4 | 1615 | } |
8f04c47a | 1616 | |
aa8968f2 DW |
1617 | /* Remove all pending CoW reservations. */ |
1618 | error = xfs_reflink_cancel_cow_blocks(ip, &tp, first_unmap_block, | |
3802a345 | 1619 | last_block, true); |
aa8968f2 DW |
1620 | if (error) |
1621 | goto out; | |
1622 | ||
1623 | /* | |
1624 | * Clear the reflink flag if we truncated everything. | |
1625 | */ | |
83104d44 | 1626 | if (ip->i_d.di_nblocks == 0 && xfs_is_reflink_inode(ip)) { |
aa8968f2 | 1627 | ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; |
83104d44 DW |
1628 | xfs_inode_clear_cowblocks_tag(ip); |
1629 | } | |
aa8968f2 | 1630 | |
673e8e59 CH |
1631 | /* |
1632 | * Always re-log the inode so that our permanent transaction can keep | |
1633 | * on rolling it forward in the log. | |
1634 | */ | |
1635 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1636 | ||
1637 | trace_xfs_itruncate_extents_end(ip, new_size); | |
1638 | ||
8f04c47a CH |
1639 | out: |
1640 | *tpp = tp; | |
1641 | return error; | |
1642 | out_bmap_cancel: | |
1da177e4 | 1643 | /* |
8f04c47a CH |
1644 | * If the bunmapi call encounters an error, return to the caller where |
1645 | * the transaction can be properly aborted. We just need to make sure | |
1646 | * we're not holding any resources that we were not when we came in. | |
1da177e4 | 1647 | */ |
2c3234d1 | 1648 | xfs_defer_cancel(&dfops); |
8f04c47a CH |
1649 | goto out; |
1650 | } | |
1651 | ||
c24b5dfa DC |
1652 | int |
1653 | xfs_release( | |
1654 | xfs_inode_t *ip) | |
1655 | { | |
1656 | xfs_mount_t *mp = ip->i_mount; | |
1657 | int error; | |
1658 | ||
c19b3b05 | 1659 | if (!S_ISREG(VFS_I(ip)->i_mode) || (VFS_I(ip)->i_mode == 0)) |
c24b5dfa DC |
1660 | return 0; |
1661 | ||
1662 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
1663 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
1664 | return 0; | |
1665 | ||
1666 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1667 | int truncated; | |
1668 | ||
c24b5dfa DC |
1669 | /* |
1670 | * If we previously truncated this file and removed old data | |
1671 | * in the process, we want to initiate "early" writeout on | |
1672 | * the last close. This is an attempt to combat the notorious | |
1673 | * NULL files problem which is particularly noticeable from a | |
1674 | * truncate down, buffered (re-)write (delalloc), followed by | |
1675 | * a crash. What we are effectively doing here is | |
1676 | * significantly reducing the time window where we'd otherwise | |
1677 | * be exposed to that problem. | |
1678 | */ | |
1679 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); | |
1680 | if (truncated) { | |
1681 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
eac152b4 | 1682 | if (ip->i_delayed_blks > 0) { |
2451337d | 1683 | error = filemap_flush(VFS_I(ip)->i_mapping); |
c24b5dfa DC |
1684 | if (error) |
1685 | return error; | |
1686 | } | |
1687 | } | |
1688 | } | |
1689 | ||
54d7b5c1 | 1690 | if (VFS_I(ip)->i_nlink == 0) |
c24b5dfa DC |
1691 | return 0; |
1692 | ||
1693 | if (xfs_can_free_eofblocks(ip, false)) { | |
1694 | ||
a36b9261 BF |
1695 | /* |
1696 | * Check if the inode is being opened, written and closed | |
1697 | * frequently and we have delayed allocation blocks outstanding | |
1698 | * (e.g. streaming writes from the NFS server), truncating the | |
1699 | * blocks past EOF will cause fragmentation to occur. | |
1700 | * | |
1701 | * In this case don't do the truncation, but we have to be | |
1702 | * careful how we detect this case. Blocks beyond EOF show up as | |
1703 | * i_delayed_blks even when the inode is clean, so we need to | |
1704 | * truncate them away first before checking for a dirty release. | |
1705 | * Hence on the first dirty close we will still remove the | |
1706 | * speculative allocation, but after that we will leave it in | |
1707 | * place. | |
1708 | */ | |
1709 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
1710 | return 0; | |
c24b5dfa DC |
1711 | /* |
1712 | * If we can't get the iolock just skip truncating the blocks | |
1713 | * past EOF because we could deadlock with the mmap_sem | |
a36b9261 | 1714 | * otherwise. We'll get another chance to drop them once the |
c24b5dfa DC |
1715 | * last reference to the inode is dropped, so we'll never leak |
1716 | * blocks permanently. | |
c24b5dfa | 1717 | */ |
a36b9261 BF |
1718 | if (xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { |
1719 | error = xfs_free_eofblocks(ip); | |
1720 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1721 | if (error) | |
1722 | return error; | |
1723 | } | |
c24b5dfa DC |
1724 | |
1725 | /* delalloc blocks after truncation means it really is dirty */ | |
1726 | if (ip->i_delayed_blks) | |
1727 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
1728 | } | |
1729 | return 0; | |
1730 | } | |
1731 | ||
f7be2d7f BF |
1732 | /* |
1733 | * xfs_inactive_truncate | |
1734 | * | |
1735 | * Called to perform a truncate when an inode becomes unlinked. | |
1736 | */ | |
1737 | STATIC int | |
1738 | xfs_inactive_truncate( | |
1739 | struct xfs_inode *ip) | |
1740 | { | |
1741 | struct xfs_mount *mp = ip->i_mount; | |
1742 | struct xfs_trans *tp; | |
1743 | int error; | |
1744 | ||
253f4911 | 1745 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
f7be2d7f BF |
1746 | if (error) { |
1747 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
f7be2d7f BF |
1748 | return error; |
1749 | } | |
1750 | ||
1751 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1752 | xfs_trans_ijoin(tp, ip, 0); | |
1753 | ||
1754 | /* | |
1755 | * Log the inode size first to prevent stale data exposure in the event | |
1756 | * of a system crash before the truncate completes. See the related | |
69bca807 | 1757 | * comment in xfs_vn_setattr_size() for details. |
f7be2d7f BF |
1758 | */ |
1759 | ip->i_d.di_size = 0; | |
1760 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1761 | ||
1762 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0); | |
1763 | if (error) | |
1764 | goto error_trans_cancel; | |
1765 | ||
1766 | ASSERT(ip->i_d.di_nextents == 0); | |
1767 | ||
70393313 | 1768 | error = xfs_trans_commit(tp); |
f7be2d7f BF |
1769 | if (error) |
1770 | goto error_unlock; | |
1771 | ||
1772 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1773 | return 0; | |
1774 | ||
1775 | error_trans_cancel: | |
4906e215 | 1776 | xfs_trans_cancel(tp); |
f7be2d7f BF |
1777 | error_unlock: |
1778 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1779 | return error; | |
1780 | } | |
1781 | ||
88877d2b BF |
1782 | /* |
1783 | * xfs_inactive_ifree() | |
1784 | * | |
1785 | * Perform the inode free when an inode is unlinked. | |
1786 | */ | |
1787 | STATIC int | |
1788 | xfs_inactive_ifree( | |
1789 | struct xfs_inode *ip) | |
1790 | { | |
2c3234d1 | 1791 | struct xfs_defer_ops dfops; |
88877d2b | 1792 | xfs_fsblock_t first_block; |
88877d2b BF |
1793 | struct xfs_mount *mp = ip->i_mount; |
1794 | struct xfs_trans *tp; | |
1795 | int error; | |
1796 | ||
9d43b180 | 1797 | /* |
76d771b4 CH |
1798 | * We try to use a per-AG reservation for any block needed by the finobt |
1799 | * tree, but as the finobt feature predates the per-AG reservation | |
1800 | * support a degraded file system might not have enough space for the | |
1801 | * reservation at mount time. In that case try to dip into the reserved | |
1802 | * pool and pray. | |
9d43b180 BF |
1803 | * |
1804 | * Send a warning if the reservation does happen to fail, as the inode | |
1805 | * now remains allocated and sits on the unlinked list until the fs is | |
1806 | * repaired. | |
1807 | */ | |
76d771b4 CH |
1808 | if (unlikely(mp->m_inotbt_nores)) { |
1809 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree, | |
1810 | XFS_IFREE_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, | |
1811 | &tp); | |
1812 | } else { | |
1813 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree, 0, 0, 0, &tp); | |
1814 | } | |
88877d2b | 1815 | if (error) { |
2451337d | 1816 | if (error == -ENOSPC) { |
9d43b180 BF |
1817 | xfs_warn_ratelimited(mp, |
1818 | "Failed to remove inode(s) from unlinked list. " | |
1819 | "Please free space, unmount and run xfs_repair."); | |
1820 | } else { | |
1821 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1822 | } | |
88877d2b BF |
1823 | return error; |
1824 | } | |
1825 | ||
1826 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1827 | xfs_trans_ijoin(tp, ip, 0); | |
1828 | ||
2c3234d1 DW |
1829 | xfs_defer_init(&dfops, &first_block); |
1830 | error = xfs_ifree(tp, ip, &dfops); | |
88877d2b BF |
1831 | if (error) { |
1832 | /* | |
1833 | * If we fail to free the inode, shut down. The cancel | |
1834 | * might do that, we need to make sure. Otherwise the | |
1835 | * inode might be lost for a long time or forever. | |
1836 | */ | |
1837 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1838 | xfs_notice(mp, "%s: xfs_ifree returned error %d", | |
1839 | __func__, error); | |
1840 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); | |
1841 | } | |
4906e215 | 1842 | xfs_trans_cancel(tp); |
88877d2b BF |
1843 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1844 | return error; | |
1845 | } | |
1846 | ||
1847 | /* | |
1848 | * Credit the quota account(s). The inode is gone. | |
1849 | */ | |
1850 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); | |
1851 | ||
1852 | /* | |
d4a97a04 BF |
1853 | * Just ignore errors at this point. There is nothing we can do except |
1854 | * to try to keep going. Make sure it's not a silent error. | |
88877d2b | 1855 | */ |
2c3234d1 | 1856 | error = xfs_defer_finish(&tp, &dfops, NULL); |
d4a97a04 | 1857 | if (error) { |
310a75a3 | 1858 | xfs_notice(mp, "%s: xfs_defer_finish returned error %d", |
88877d2b | 1859 | __func__, error); |
2c3234d1 | 1860 | xfs_defer_cancel(&dfops); |
d4a97a04 | 1861 | } |
70393313 | 1862 | error = xfs_trans_commit(tp); |
88877d2b BF |
1863 | if (error) |
1864 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", | |
1865 | __func__, error); | |
1866 | ||
1867 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1868 | return 0; | |
1869 | } | |
1870 | ||
c24b5dfa DC |
1871 | /* |
1872 | * xfs_inactive | |
1873 | * | |
1874 | * This is called when the vnode reference count for the vnode | |
1875 | * goes to zero. If the file has been unlinked, then it must | |
1876 | * now be truncated. Also, we clear all of the read-ahead state | |
1877 | * kept for the inode here since the file is now closed. | |
1878 | */ | |
74564fb4 | 1879 | void |
c24b5dfa DC |
1880 | xfs_inactive( |
1881 | xfs_inode_t *ip) | |
1882 | { | |
3d3c8b52 | 1883 | struct xfs_mount *mp; |
3d3c8b52 JL |
1884 | int error; |
1885 | int truncate = 0; | |
c24b5dfa DC |
1886 | |
1887 | /* | |
1888 | * If the inode is already free, then there can be nothing | |
1889 | * to clean up here. | |
1890 | */ | |
c19b3b05 | 1891 | if (VFS_I(ip)->i_mode == 0) { |
c24b5dfa DC |
1892 | ASSERT(ip->i_df.if_real_bytes == 0); |
1893 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
74564fb4 | 1894 | return; |
c24b5dfa DC |
1895 | } |
1896 | ||
1897 | mp = ip->i_mount; | |
17c12bcd | 1898 | ASSERT(!xfs_iflags_test(ip, XFS_IRECOVERY)); |
c24b5dfa | 1899 | |
c24b5dfa DC |
1900 | /* If this is a read-only mount, don't do this (would generate I/O) */ |
1901 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
74564fb4 | 1902 | return; |
c24b5dfa | 1903 | |
54d7b5c1 | 1904 | if (VFS_I(ip)->i_nlink != 0) { |
c24b5dfa DC |
1905 | /* |
1906 | * force is true because we are evicting an inode from the | |
1907 | * cache. Post-eof blocks must be freed, lest we end up with | |
1908 | * broken free space accounting. | |
3b4683c2 BF |
1909 | * |
1910 | * Note: don't bother with iolock here since lockdep complains | |
1911 | * about acquiring it in reclaim context. We have the only | |
1912 | * reference to the inode at this point anyways. | |
c24b5dfa | 1913 | */ |
3b4683c2 | 1914 | if (xfs_can_free_eofblocks(ip, true)) |
a36b9261 | 1915 | xfs_free_eofblocks(ip); |
74564fb4 BF |
1916 | |
1917 | return; | |
c24b5dfa DC |
1918 | } |
1919 | ||
c19b3b05 | 1920 | if (S_ISREG(VFS_I(ip)->i_mode) && |
c24b5dfa DC |
1921 | (ip->i_d.di_size != 0 || XFS_ISIZE(ip) != 0 || |
1922 | ip->i_d.di_nextents > 0 || ip->i_delayed_blks > 0)) | |
1923 | truncate = 1; | |
1924 | ||
1925 | error = xfs_qm_dqattach(ip, 0); | |
1926 | if (error) | |
74564fb4 | 1927 | return; |
c24b5dfa | 1928 | |
c19b3b05 | 1929 | if (S_ISLNK(VFS_I(ip)->i_mode)) |
36b21dde | 1930 | error = xfs_inactive_symlink(ip); |
f7be2d7f BF |
1931 | else if (truncate) |
1932 | error = xfs_inactive_truncate(ip); | |
1933 | if (error) | |
74564fb4 | 1934 | return; |
c24b5dfa DC |
1935 | |
1936 | /* | |
1937 | * If there are attributes associated with the file then blow them away | |
1938 | * now. The code calls a routine that recursively deconstructs the | |
6dfe5a04 | 1939 | * attribute fork. If also blows away the in-core attribute fork. |
c24b5dfa | 1940 | */ |
6dfe5a04 | 1941 | if (XFS_IFORK_Q(ip)) { |
c24b5dfa DC |
1942 | error = xfs_attr_inactive(ip); |
1943 | if (error) | |
74564fb4 | 1944 | return; |
c24b5dfa DC |
1945 | } |
1946 | ||
6dfe5a04 | 1947 | ASSERT(!ip->i_afp); |
c24b5dfa | 1948 | ASSERT(ip->i_d.di_anextents == 0); |
6dfe5a04 | 1949 | ASSERT(ip->i_d.di_forkoff == 0); |
c24b5dfa DC |
1950 | |
1951 | /* | |
1952 | * Free the inode. | |
1953 | */ | |
88877d2b BF |
1954 | error = xfs_inactive_ifree(ip); |
1955 | if (error) | |
74564fb4 | 1956 | return; |
c24b5dfa DC |
1957 | |
1958 | /* | |
1959 | * Release the dquots held by inode, if any. | |
1960 | */ | |
1961 | xfs_qm_dqdetach(ip); | |
c24b5dfa DC |
1962 | } |
1963 | ||
1da177e4 | 1964 | /* |
54d7b5c1 DC |
1965 | * This is called when the inode's link count goes to 0 or we are creating a |
1966 | * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be | |
1967 | * set to true as the link count is dropped to zero by the VFS after we've | |
1968 | * created the file successfully, so we have to add it to the unlinked list | |
1969 | * while the link count is non-zero. | |
1970 | * | |
1971 | * We place the on-disk inode on a list in the AGI. It will be pulled from this | |
1972 | * list when the inode is freed. | |
1da177e4 | 1973 | */ |
54d7b5c1 | 1974 | STATIC int |
1da177e4 | 1975 | xfs_iunlink( |
54d7b5c1 DC |
1976 | struct xfs_trans *tp, |
1977 | struct xfs_inode *ip) | |
1da177e4 | 1978 | { |
54d7b5c1 | 1979 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1980 | xfs_agi_t *agi; |
1981 | xfs_dinode_t *dip; | |
1982 | xfs_buf_t *agibp; | |
1983 | xfs_buf_t *ibp; | |
1da177e4 LT |
1984 | xfs_agino_t agino; |
1985 | short bucket_index; | |
1986 | int offset; | |
1987 | int error; | |
1da177e4 | 1988 | |
c19b3b05 | 1989 | ASSERT(VFS_I(ip)->i_mode != 0); |
1da177e4 | 1990 | |
1da177e4 LT |
1991 | /* |
1992 | * Get the agi buffer first. It ensures lock ordering | |
1993 | * on the list. | |
1994 | */ | |
5e1be0fb | 1995 | error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp); |
859d7182 | 1996 | if (error) |
1da177e4 | 1997 | return error; |
1da177e4 | 1998 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 1999 | |
1da177e4 LT |
2000 | /* |
2001 | * Get the index into the agi hash table for the | |
2002 | * list this inode will go on. | |
2003 | */ | |
2004 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
2005 | ASSERT(agino != 0); | |
2006 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
2007 | ASSERT(agi->agi_unlinked[bucket_index]); | |
16259e7d | 2008 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino); |
1da177e4 | 2009 | |
69ef921b | 2010 | if (agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)) { |
1da177e4 LT |
2011 | /* |
2012 | * There is already another inode in the bucket we need | |
2013 | * to add ourselves to. Add us at the front of the list. | |
2014 | * Here we put the head pointer into our next pointer, | |
2015 | * and then we fall through to point the head at us. | |
2016 | */ | |
475ee413 CH |
2017 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2018 | 0, 0); | |
c319b58b VA |
2019 | if (error) |
2020 | return error; | |
2021 | ||
69ef921b | 2022 | ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO)); |
1da177e4 | 2023 | dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; |
92bfc6e7 | 2024 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2025 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2026 | |
2027 | /* need to recalc the inode CRC if appropriate */ | |
2028 | xfs_dinode_calc_crc(mp, dip); | |
2029 | ||
1da177e4 LT |
2030 | xfs_trans_inode_buf(tp, ibp); |
2031 | xfs_trans_log_buf(tp, ibp, offset, | |
2032 | (offset + sizeof(xfs_agino_t) - 1)); | |
2033 | xfs_inobp_check(mp, ibp); | |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * Point the bucket head pointer at the inode being inserted. | |
2038 | */ | |
2039 | ASSERT(agino != 0); | |
16259e7d | 2040 | agi->agi_unlinked[bucket_index] = cpu_to_be32(agino); |
1da177e4 LT |
2041 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
2042 | (sizeof(xfs_agino_t) * bucket_index); | |
2043 | xfs_trans_log_buf(tp, agibp, offset, | |
2044 | (offset + sizeof(xfs_agino_t) - 1)); | |
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * Pull the on-disk inode from the AGI unlinked list. | |
2050 | */ | |
2051 | STATIC int | |
2052 | xfs_iunlink_remove( | |
2053 | xfs_trans_t *tp, | |
2054 | xfs_inode_t *ip) | |
2055 | { | |
2056 | xfs_ino_t next_ino; | |
2057 | xfs_mount_t *mp; | |
2058 | xfs_agi_t *agi; | |
2059 | xfs_dinode_t *dip; | |
2060 | xfs_buf_t *agibp; | |
2061 | xfs_buf_t *ibp; | |
2062 | xfs_agnumber_t agno; | |
1da177e4 LT |
2063 | xfs_agino_t agino; |
2064 | xfs_agino_t next_agino; | |
2065 | xfs_buf_t *last_ibp; | |
6fdf8ccc | 2066 | xfs_dinode_t *last_dip = NULL; |
1da177e4 | 2067 | short bucket_index; |
6fdf8ccc | 2068 | int offset, last_offset = 0; |
1da177e4 | 2069 | int error; |
1da177e4 | 2070 | |
1da177e4 | 2071 | mp = tp->t_mountp; |
1da177e4 | 2072 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
1da177e4 LT |
2073 | |
2074 | /* | |
2075 | * Get the agi buffer first. It ensures lock ordering | |
2076 | * on the list. | |
2077 | */ | |
5e1be0fb CH |
2078 | error = xfs_read_agi(mp, tp, agno, &agibp); |
2079 | if (error) | |
1da177e4 | 2080 | return error; |
5e1be0fb | 2081 | |
1da177e4 | 2082 | agi = XFS_BUF_TO_AGI(agibp); |
5e1be0fb | 2083 | |
1da177e4 LT |
2084 | /* |
2085 | * Get the index into the agi hash table for the | |
2086 | * list this inode will go on. | |
2087 | */ | |
2088 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); | |
2089 | ASSERT(agino != 0); | |
2090 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; | |
69ef921b | 2091 | ASSERT(agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)); |
1da177e4 LT |
2092 | ASSERT(agi->agi_unlinked[bucket_index]); |
2093 | ||
16259e7d | 2094 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) { |
1da177e4 | 2095 | /* |
475ee413 CH |
2096 | * We're at the head of the list. Get the inode's on-disk |
2097 | * buffer to see if there is anyone after us on the list. | |
2098 | * Only modify our next pointer if it is not already NULLAGINO. | |
2099 | * This saves us the overhead of dealing with the buffer when | |
2100 | * there is no need to change it. | |
1da177e4 | 2101 | */ |
475ee413 CH |
2102 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2103 | 0, 0); | |
1da177e4 | 2104 | if (error) { |
475ee413 | 2105 | xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 2106 | __func__, error); |
1da177e4 LT |
2107 | return error; |
2108 | } | |
347d1c01 | 2109 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
2110 | ASSERT(next_agino != 0); |
2111 | if (next_agino != NULLAGINO) { | |
347d1c01 | 2112 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 2113 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2114 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2115 | |
2116 | /* need to recalc the inode CRC if appropriate */ | |
2117 | xfs_dinode_calc_crc(mp, dip); | |
2118 | ||
1da177e4 LT |
2119 | xfs_trans_inode_buf(tp, ibp); |
2120 | xfs_trans_log_buf(tp, ibp, offset, | |
2121 | (offset + sizeof(xfs_agino_t) - 1)); | |
2122 | xfs_inobp_check(mp, ibp); | |
2123 | } else { | |
2124 | xfs_trans_brelse(tp, ibp); | |
2125 | } | |
2126 | /* | |
2127 | * Point the bucket head pointer at the next inode. | |
2128 | */ | |
2129 | ASSERT(next_agino != 0); | |
2130 | ASSERT(next_agino != agino); | |
16259e7d | 2131 | agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino); |
1da177e4 LT |
2132 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
2133 | (sizeof(xfs_agino_t) * bucket_index); | |
2134 | xfs_trans_log_buf(tp, agibp, offset, | |
2135 | (offset + sizeof(xfs_agino_t) - 1)); | |
2136 | } else { | |
2137 | /* | |
2138 | * We need to search the list for the inode being freed. | |
2139 | */ | |
16259e7d | 2140 | next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]); |
1da177e4 LT |
2141 | last_ibp = NULL; |
2142 | while (next_agino != agino) { | |
129dbc9a CH |
2143 | struct xfs_imap imap; |
2144 | ||
2145 | if (last_ibp) | |
1da177e4 | 2146 | xfs_trans_brelse(tp, last_ibp); |
129dbc9a CH |
2147 | |
2148 | imap.im_blkno = 0; | |
1da177e4 | 2149 | next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino); |
129dbc9a CH |
2150 | |
2151 | error = xfs_imap(mp, tp, next_ino, &imap, 0); | |
2152 | if (error) { | |
2153 | xfs_warn(mp, | |
2154 | "%s: xfs_imap returned error %d.", | |
2155 | __func__, error); | |
2156 | return error; | |
2157 | } | |
2158 | ||
2159 | error = xfs_imap_to_bp(mp, tp, &imap, &last_dip, | |
2160 | &last_ibp, 0, 0); | |
1da177e4 | 2161 | if (error) { |
0b932ccc | 2162 | xfs_warn(mp, |
129dbc9a | 2163 | "%s: xfs_imap_to_bp returned error %d.", |
0b932ccc | 2164 | __func__, error); |
1da177e4 LT |
2165 | return error; |
2166 | } | |
129dbc9a CH |
2167 | |
2168 | last_offset = imap.im_boffset; | |
347d1c01 | 2169 | next_agino = be32_to_cpu(last_dip->di_next_unlinked); |
1da177e4 LT |
2170 | ASSERT(next_agino != NULLAGINO); |
2171 | ASSERT(next_agino != 0); | |
2172 | } | |
475ee413 | 2173 | |
1da177e4 | 2174 | /* |
475ee413 CH |
2175 | * Now last_ibp points to the buffer previous to us on the |
2176 | * unlinked list. Pull us from the list. | |
1da177e4 | 2177 | */ |
475ee413 CH |
2178 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, |
2179 | 0, 0); | |
1da177e4 | 2180 | if (error) { |
475ee413 | 2181 | xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.", |
0b932ccc | 2182 | __func__, error); |
1da177e4 LT |
2183 | return error; |
2184 | } | |
347d1c01 | 2185 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
1da177e4 LT |
2186 | ASSERT(next_agino != 0); |
2187 | ASSERT(next_agino != agino); | |
2188 | if (next_agino != NULLAGINO) { | |
347d1c01 | 2189 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
92bfc6e7 | 2190 | offset = ip->i_imap.im_boffset + |
1da177e4 | 2191 | offsetof(xfs_dinode_t, di_next_unlinked); |
0a32c26e DC |
2192 | |
2193 | /* need to recalc the inode CRC if appropriate */ | |
2194 | xfs_dinode_calc_crc(mp, dip); | |
2195 | ||
1da177e4 LT |
2196 | xfs_trans_inode_buf(tp, ibp); |
2197 | xfs_trans_log_buf(tp, ibp, offset, | |
2198 | (offset + sizeof(xfs_agino_t) - 1)); | |
2199 | xfs_inobp_check(mp, ibp); | |
2200 | } else { | |
2201 | xfs_trans_brelse(tp, ibp); | |
2202 | } | |
2203 | /* | |
2204 | * Point the previous inode on the list to the next inode. | |
2205 | */ | |
347d1c01 | 2206 | last_dip->di_next_unlinked = cpu_to_be32(next_agino); |
1da177e4 LT |
2207 | ASSERT(next_agino != 0); |
2208 | offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked); | |
0a32c26e DC |
2209 | |
2210 | /* need to recalc the inode CRC if appropriate */ | |
2211 | xfs_dinode_calc_crc(mp, last_dip); | |
2212 | ||
1da177e4 LT |
2213 | xfs_trans_inode_buf(tp, last_ibp); |
2214 | xfs_trans_log_buf(tp, last_ibp, offset, | |
2215 | (offset + sizeof(xfs_agino_t) - 1)); | |
2216 | xfs_inobp_check(mp, last_ibp); | |
2217 | } | |
2218 | return 0; | |
2219 | } | |
2220 | ||
5b3eed75 | 2221 | /* |
0b8182db | 2222 | * A big issue when freeing the inode cluster is that we _cannot_ skip any |
5b3eed75 DC |
2223 | * inodes that are in memory - they all must be marked stale and attached to |
2224 | * the cluster buffer. | |
2225 | */ | |
2a30f36d | 2226 | STATIC int |
1da177e4 | 2227 | xfs_ifree_cluster( |
09b56604 BF |
2228 | xfs_inode_t *free_ip, |
2229 | xfs_trans_t *tp, | |
2230 | struct xfs_icluster *xic) | |
1da177e4 LT |
2231 | { |
2232 | xfs_mount_t *mp = free_ip->i_mount; | |
2233 | int blks_per_cluster; | |
982e939e | 2234 | int inodes_per_cluster; |
1da177e4 | 2235 | int nbufs; |
5b257b4a | 2236 | int i, j; |
3cdaa189 | 2237 | int ioffset; |
1da177e4 LT |
2238 | xfs_daddr_t blkno; |
2239 | xfs_buf_t *bp; | |
5b257b4a | 2240 | xfs_inode_t *ip; |
1da177e4 LT |
2241 | xfs_inode_log_item_t *iip; |
2242 | xfs_log_item_t *lip; | |
5017e97d | 2243 | struct xfs_perag *pag; |
09b56604 | 2244 | xfs_ino_t inum; |
1da177e4 | 2245 | |
09b56604 | 2246 | inum = xic->first_ino; |
5017e97d | 2247 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum)); |
982e939e JL |
2248 | blks_per_cluster = xfs_icluster_size_fsb(mp); |
2249 | inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog; | |
2250 | nbufs = mp->m_ialloc_blks / blks_per_cluster; | |
1da177e4 | 2251 | |
982e939e | 2252 | for (j = 0; j < nbufs; j++, inum += inodes_per_cluster) { |
09b56604 BF |
2253 | /* |
2254 | * The allocation bitmap tells us which inodes of the chunk were | |
2255 | * physically allocated. Skip the cluster if an inode falls into | |
2256 | * a sparse region. | |
2257 | */ | |
3cdaa189 BF |
2258 | ioffset = inum - xic->first_ino; |
2259 | if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) { | |
2260 | ASSERT(do_mod(ioffset, inodes_per_cluster) == 0); | |
09b56604 BF |
2261 | continue; |
2262 | } | |
2263 | ||
1da177e4 LT |
2264 | blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum), |
2265 | XFS_INO_TO_AGBNO(mp, inum)); | |
2266 | ||
5b257b4a DC |
2267 | /* |
2268 | * We obtain and lock the backing buffer first in the process | |
2269 | * here, as we have to ensure that any dirty inode that we | |
2270 | * can't get the flush lock on is attached to the buffer. | |
2271 | * If we scan the in-memory inodes first, then buffer IO can | |
2272 | * complete before we get a lock on it, and hence we may fail | |
2273 | * to mark all the active inodes on the buffer stale. | |
2274 | */ | |
2275 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, | |
b6aff29f DC |
2276 | mp->m_bsize * blks_per_cluster, |
2277 | XBF_UNMAPPED); | |
5b257b4a | 2278 | |
2a30f36d | 2279 | if (!bp) |
2451337d | 2280 | return -ENOMEM; |
b0f539de DC |
2281 | |
2282 | /* | |
2283 | * This buffer may not have been correctly initialised as we | |
2284 | * didn't read it from disk. That's not important because we are | |
2285 | * only using to mark the buffer as stale in the log, and to | |
2286 | * attach stale cached inodes on it. That means it will never be | |
2287 | * dispatched for IO. If it is, we want to know about it, and we | |
2288 | * want it to fail. We can acheive this by adding a write | |
2289 | * verifier to the buffer. | |
2290 | */ | |
1813dd64 | 2291 | bp->b_ops = &xfs_inode_buf_ops; |
b0f539de | 2292 | |
5b257b4a DC |
2293 | /* |
2294 | * Walk the inodes already attached to the buffer and mark them | |
2295 | * stale. These will all have the flush locks held, so an | |
5b3eed75 DC |
2296 | * in-memory inode walk can't lock them. By marking them all |
2297 | * stale first, we will not attempt to lock them in the loop | |
2298 | * below as the XFS_ISTALE flag will be set. | |
5b257b4a | 2299 | */ |
adadbeef | 2300 | lip = bp->b_fspriv; |
5b257b4a DC |
2301 | while (lip) { |
2302 | if (lip->li_type == XFS_LI_INODE) { | |
2303 | iip = (xfs_inode_log_item_t *)lip; | |
2304 | ASSERT(iip->ili_logged == 1); | |
ca30b2a7 | 2305 | lip->li_cb = xfs_istale_done; |
5b257b4a DC |
2306 | xfs_trans_ail_copy_lsn(mp->m_ail, |
2307 | &iip->ili_flush_lsn, | |
2308 | &iip->ili_item.li_lsn); | |
2309 | xfs_iflags_set(iip->ili_inode, XFS_ISTALE); | |
5b257b4a DC |
2310 | } |
2311 | lip = lip->li_bio_list; | |
2312 | } | |
1da177e4 | 2313 | |
5b3eed75 | 2314 | |
1da177e4 | 2315 | /* |
5b257b4a DC |
2316 | * For each inode in memory attempt to add it to the inode |
2317 | * buffer and set it up for being staled on buffer IO | |
2318 | * completion. This is safe as we've locked out tail pushing | |
2319 | * and flushing by locking the buffer. | |
1da177e4 | 2320 | * |
5b257b4a DC |
2321 | * We have already marked every inode that was part of a |
2322 | * transaction stale above, which means there is no point in | |
2323 | * even trying to lock them. | |
1da177e4 | 2324 | */ |
982e939e | 2325 | for (i = 0; i < inodes_per_cluster; i++) { |
5b3eed75 | 2326 | retry: |
1a3e8f3d | 2327 | rcu_read_lock(); |
da353b0d DC |
2328 | ip = radix_tree_lookup(&pag->pag_ici_root, |
2329 | XFS_INO_TO_AGINO(mp, (inum + i))); | |
1da177e4 | 2330 | |
1a3e8f3d DC |
2331 | /* Inode not in memory, nothing to do */ |
2332 | if (!ip) { | |
2333 | rcu_read_unlock(); | |
1da177e4 LT |
2334 | continue; |
2335 | } | |
2336 | ||
1a3e8f3d DC |
2337 | /* |
2338 | * because this is an RCU protected lookup, we could | |
2339 | * find a recently freed or even reallocated inode | |
2340 | * during the lookup. We need to check under the | |
2341 | * i_flags_lock for a valid inode here. Skip it if it | |
2342 | * is not valid, the wrong inode or stale. | |
2343 | */ | |
2344 | spin_lock(&ip->i_flags_lock); | |
2345 | if (ip->i_ino != inum + i || | |
2346 | __xfs_iflags_test(ip, XFS_ISTALE)) { | |
2347 | spin_unlock(&ip->i_flags_lock); | |
2348 | rcu_read_unlock(); | |
2349 | continue; | |
2350 | } | |
2351 | spin_unlock(&ip->i_flags_lock); | |
2352 | ||
5b3eed75 DC |
2353 | /* |
2354 | * Don't try to lock/unlock the current inode, but we | |
2355 | * _cannot_ skip the other inodes that we did not find | |
2356 | * in the list attached to the buffer and are not | |
2357 | * already marked stale. If we can't lock it, back off | |
2358 | * and retry. | |
2359 | */ | |
5b257b4a DC |
2360 | if (ip != free_ip && |
2361 | !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { | |
1a3e8f3d | 2362 | rcu_read_unlock(); |
5b3eed75 DC |
2363 | delay(1); |
2364 | goto retry; | |
1da177e4 | 2365 | } |
1a3e8f3d | 2366 | rcu_read_unlock(); |
1da177e4 | 2367 | |
5b3eed75 | 2368 | xfs_iflock(ip); |
5b257b4a | 2369 | xfs_iflags_set(ip, XFS_ISTALE); |
1da177e4 | 2370 | |
5b3eed75 DC |
2371 | /* |
2372 | * we don't need to attach clean inodes or those only | |
2373 | * with unlogged changes (which we throw away, anyway). | |
2374 | */ | |
1da177e4 | 2375 | iip = ip->i_itemp; |
5b3eed75 | 2376 | if (!iip || xfs_inode_clean(ip)) { |
5b257b4a | 2377 | ASSERT(ip != free_ip); |
1da177e4 LT |
2378 | xfs_ifunlock(ip); |
2379 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2380 | continue; | |
2381 | } | |
2382 | ||
f5d8d5c4 CH |
2383 | iip->ili_last_fields = iip->ili_fields; |
2384 | iip->ili_fields = 0; | |
fc0561ce | 2385 | iip->ili_fsync_fields = 0; |
1da177e4 | 2386 | iip->ili_logged = 1; |
7b2e2a31 DC |
2387 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
2388 | &iip->ili_item.li_lsn); | |
1da177e4 | 2389 | |
ca30b2a7 CH |
2390 | xfs_buf_attach_iodone(bp, xfs_istale_done, |
2391 | &iip->ili_item); | |
5b257b4a DC |
2392 | |
2393 | if (ip != free_ip) | |
1da177e4 | 2394 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
2395 | } |
2396 | ||
5b3eed75 | 2397 | xfs_trans_stale_inode_buf(tp, bp); |
1da177e4 LT |
2398 | xfs_trans_binval(tp, bp); |
2399 | } | |
2400 | ||
5017e97d | 2401 | xfs_perag_put(pag); |
2a30f36d | 2402 | return 0; |
1da177e4 LT |
2403 | } |
2404 | ||
2405 | /* | |
2406 | * This is called to return an inode to the inode free list. | |
2407 | * The inode should already be truncated to 0 length and have | |
2408 | * no pages associated with it. This routine also assumes that | |
2409 | * the inode is already a part of the transaction. | |
2410 | * | |
2411 | * The on-disk copy of the inode will have been added to the list | |
2412 | * of unlinked inodes in the AGI. We need to remove the inode from | |
2413 | * that list atomically with respect to freeing it here. | |
2414 | */ | |
2415 | int | |
2416 | xfs_ifree( | |
2417 | xfs_trans_t *tp, | |
2418 | xfs_inode_t *ip, | |
2c3234d1 | 2419 | struct xfs_defer_ops *dfops) |
1da177e4 LT |
2420 | { |
2421 | int error; | |
09b56604 | 2422 | struct xfs_icluster xic = { 0 }; |
1da177e4 | 2423 | |
579aa9ca | 2424 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
54d7b5c1 | 2425 | ASSERT(VFS_I(ip)->i_nlink == 0); |
1da177e4 LT |
2426 | ASSERT(ip->i_d.di_nextents == 0); |
2427 | ASSERT(ip->i_d.di_anextents == 0); | |
c19b3b05 | 2428 | ASSERT(ip->i_d.di_size == 0 || !S_ISREG(VFS_I(ip)->i_mode)); |
1da177e4 LT |
2429 | ASSERT(ip->i_d.di_nblocks == 0); |
2430 | ||
2431 | /* | |
2432 | * Pull the on-disk inode from the AGI unlinked list. | |
2433 | */ | |
2434 | error = xfs_iunlink_remove(tp, ip); | |
1baaed8f | 2435 | if (error) |
1da177e4 | 2436 | return error; |
1da177e4 | 2437 | |
2c3234d1 | 2438 | error = xfs_difree(tp, ip->i_ino, dfops, &xic); |
1baaed8f | 2439 | if (error) |
1da177e4 | 2440 | return error; |
1baaed8f | 2441 | |
c19b3b05 | 2442 | VFS_I(ip)->i_mode = 0; /* mark incore inode as free */ |
1da177e4 LT |
2443 | ip->i_d.di_flags = 0; |
2444 | ip->i_d.di_dmevmask = 0; | |
2445 | ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */ | |
1da177e4 LT |
2446 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
2447 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
2448 | /* | |
2449 | * Bump the generation count so no one will be confused | |
2450 | * by reincarnations of this inode. | |
2451 | */ | |
9e9a2674 | 2452 | VFS_I(ip)->i_generation++; |
1da177e4 LT |
2453 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
2454 | ||
09b56604 BF |
2455 | if (xic.deleted) |
2456 | error = xfs_ifree_cluster(ip, tp, &xic); | |
1da177e4 | 2457 | |
2a30f36d | 2458 | return error; |
1da177e4 LT |
2459 | } |
2460 | ||
1da177e4 | 2461 | /* |
60ec6783 CH |
2462 | * This is called to unpin an inode. The caller must have the inode locked |
2463 | * in at least shared mode so that the buffer cannot be subsequently pinned | |
2464 | * once someone is waiting for it to be unpinned. | |
1da177e4 | 2465 | */ |
60ec6783 | 2466 | static void |
f392e631 | 2467 | xfs_iunpin( |
60ec6783 | 2468 | struct xfs_inode *ip) |
1da177e4 | 2469 | { |
579aa9ca | 2470 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 | 2471 | |
4aaf15d1 DC |
2472 | trace_xfs_inode_unpin_nowait(ip, _RET_IP_); |
2473 | ||
a3f74ffb | 2474 | /* Give the log a push to start the unpinning I/O */ |
60ec6783 | 2475 | xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0); |
a14a348b | 2476 | |
a3f74ffb | 2477 | } |
1da177e4 | 2478 | |
f392e631 CH |
2479 | static void |
2480 | __xfs_iunpin_wait( | |
2481 | struct xfs_inode *ip) | |
2482 | { | |
2483 | wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IPINNED_BIT); | |
2484 | DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IPINNED_BIT); | |
2485 | ||
2486 | xfs_iunpin(ip); | |
2487 | ||
2488 | do { | |
2489 | prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE); | |
2490 | if (xfs_ipincount(ip)) | |
2491 | io_schedule(); | |
2492 | } while (xfs_ipincount(ip)); | |
2493 | finish_wait(wq, &wait.wait); | |
2494 | } | |
2495 | ||
777df5af | 2496 | void |
a3f74ffb | 2497 | xfs_iunpin_wait( |
60ec6783 | 2498 | struct xfs_inode *ip) |
a3f74ffb | 2499 | { |
f392e631 CH |
2500 | if (xfs_ipincount(ip)) |
2501 | __xfs_iunpin_wait(ip); | |
1da177e4 LT |
2502 | } |
2503 | ||
27320369 DC |
2504 | /* |
2505 | * Removing an inode from the namespace involves removing the directory entry | |
2506 | * and dropping the link count on the inode. Removing the directory entry can | |
2507 | * result in locking an AGF (directory blocks were freed) and removing a link | |
2508 | * count can result in placing the inode on an unlinked list which results in | |
2509 | * locking an AGI. | |
2510 | * | |
2511 | * The big problem here is that we have an ordering constraint on AGF and AGI | |
2512 | * locking - inode allocation locks the AGI, then can allocate a new extent for | |
2513 | * new inodes, locking the AGF after the AGI. Similarly, freeing the inode | |
2514 | * removes the inode from the unlinked list, requiring that we lock the AGI | |
2515 | * first, and then freeing the inode can result in an inode chunk being freed | |
2516 | * and hence freeing disk space requiring that we lock an AGF. | |
2517 | * | |
2518 | * Hence the ordering that is imposed by other parts of the code is AGI before | |
2519 | * AGF. This means we cannot remove the directory entry before we drop the inode | |
2520 | * reference count and put it on the unlinked list as this results in a lock | |
2521 | * order of AGF then AGI, and this can deadlock against inode allocation and | |
2522 | * freeing. Therefore we must drop the link counts before we remove the | |
2523 | * directory entry. | |
2524 | * | |
2525 | * This is still safe from a transactional point of view - it is not until we | |
310a75a3 | 2526 | * get to xfs_defer_finish() that we have the possibility of multiple |
27320369 DC |
2527 | * transactions in this operation. Hence as long as we remove the directory |
2528 | * entry and drop the link count in the first transaction of the remove | |
2529 | * operation, there are no transactional constraints on the ordering here. | |
2530 | */ | |
c24b5dfa DC |
2531 | int |
2532 | xfs_remove( | |
2533 | xfs_inode_t *dp, | |
2534 | struct xfs_name *name, | |
2535 | xfs_inode_t *ip) | |
2536 | { | |
2537 | xfs_mount_t *mp = dp->i_mount; | |
2538 | xfs_trans_t *tp = NULL; | |
c19b3b05 | 2539 | int is_dir = S_ISDIR(VFS_I(ip)->i_mode); |
c24b5dfa | 2540 | int error = 0; |
2c3234d1 | 2541 | struct xfs_defer_ops dfops; |
c24b5dfa | 2542 | xfs_fsblock_t first_block; |
c24b5dfa | 2543 | uint resblks; |
c24b5dfa DC |
2544 | |
2545 | trace_xfs_remove(dp, name); | |
2546 | ||
2547 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 2548 | return -EIO; |
c24b5dfa DC |
2549 | |
2550 | error = xfs_qm_dqattach(dp, 0); | |
2551 | if (error) | |
2552 | goto std_return; | |
2553 | ||
2554 | error = xfs_qm_dqattach(ip, 0); | |
2555 | if (error) | |
2556 | goto std_return; | |
2557 | ||
c24b5dfa DC |
2558 | /* |
2559 | * We try to get the real space reservation first, | |
2560 | * allowing for directory btree deletion(s) implying | |
2561 | * possible bmap insert(s). If we can't get the space | |
2562 | * reservation then we use 0 instead, and avoid the bmap | |
2563 | * btree insert(s) in the directory code by, if the bmap | |
2564 | * insert tries to happen, instead trimming the LAST | |
2565 | * block from the directory. | |
2566 | */ | |
2567 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
253f4911 | 2568 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_remove, resblks, 0, 0, &tp); |
2451337d | 2569 | if (error == -ENOSPC) { |
c24b5dfa | 2570 | resblks = 0; |
253f4911 CH |
2571 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_remove, 0, 0, 0, |
2572 | &tp); | |
c24b5dfa DC |
2573 | } |
2574 | if (error) { | |
2451337d | 2575 | ASSERT(error != -ENOSPC); |
253f4911 | 2576 | goto std_return; |
c24b5dfa DC |
2577 | } |
2578 | ||
2579 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); | |
2580 | ||
65523218 | 2581 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
c24b5dfa DC |
2582 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
2583 | ||
2584 | /* | |
2585 | * If we're removing a directory perform some additional validation. | |
2586 | */ | |
2587 | if (is_dir) { | |
54d7b5c1 DC |
2588 | ASSERT(VFS_I(ip)->i_nlink >= 2); |
2589 | if (VFS_I(ip)->i_nlink != 2) { | |
2451337d | 2590 | error = -ENOTEMPTY; |
c24b5dfa DC |
2591 | goto out_trans_cancel; |
2592 | } | |
2593 | if (!xfs_dir_isempty(ip)) { | |
2451337d | 2594 | error = -ENOTEMPTY; |
c24b5dfa DC |
2595 | goto out_trans_cancel; |
2596 | } | |
c24b5dfa | 2597 | |
27320369 | 2598 | /* Drop the link from ip's "..". */ |
c24b5dfa DC |
2599 | error = xfs_droplink(tp, dp); |
2600 | if (error) | |
27320369 | 2601 | goto out_trans_cancel; |
c24b5dfa | 2602 | |
27320369 | 2603 | /* Drop the "." link from ip to self. */ |
c24b5dfa DC |
2604 | error = xfs_droplink(tp, ip); |
2605 | if (error) | |
27320369 | 2606 | goto out_trans_cancel; |
c24b5dfa DC |
2607 | } else { |
2608 | /* | |
2609 | * When removing a non-directory we need to log the parent | |
2610 | * inode here. For a directory this is done implicitly | |
2611 | * by the xfs_droplink call for the ".." entry. | |
2612 | */ | |
2613 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2614 | } | |
27320369 | 2615 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
c24b5dfa | 2616 | |
27320369 | 2617 | /* Drop the link from dp to ip. */ |
c24b5dfa DC |
2618 | error = xfs_droplink(tp, ip); |
2619 | if (error) | |
27320369 | 2620 | goto out_trans_cancel; |
c24b5dfa | 2621 | |
2c3234d1 | 2622 | xfs_defer_init(&dfops, &first_block); |
27320369 | 2623 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
2c3234d1 | 2624 | &first_block, &dfops, resblks); |
27320369 | 2625 | if (error) { |
2451337d | 2626 | ASSERT(error != -ENOENT); |
27320369 DC |
2627 | goto out_bmap_cancel; |
2628 | } | |
2629 | ||
c24b5dfa DC |
2630 | /* |
2631 | * If this is a synchronous mount, make sure that the | |
2632 | * remove transaction goes to disk before returning to | |
2633 | * the user. | |
2634 | */ | |
2635 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
2636 | xfs_trans_set_sync(tp); | |
2637 | ||
2c3234d1 | 2638 | error = xfs_defer_finish(&tp, &dfops, NULL); |
c24b5dfa DC |
2639 | if (error) |
2640 | goto out_bmap_cancel; | |
2641 | ||
70393313 | 2642 | error = xfs_trans_commit(tp); |
c24b5dfa DC |
2643 | if (error) |
2644 | goto std_return; | |
2645 | ||
2cd2ef6a | 2646 | if (is_dir && xfs_inode_is_filestream(ip)) |
c24b5dfa DC |
2647 | xfs_filestream_deassociate(ip); |
2648 | ||
2649 | return 0; | |
2650 | ||
2651 | out_bmap_cancel: | |
2c3234d1 | 2652 | xfs_defer_cancel(&dfops); |
c24b5dfa | 2653 | out_trans_cancel: |
4906e215 | 2654 | xfs_trans_cancel(tp); |
c24b5dfa DC |
2655 | std_return: |
2656 | return error; | |
2657 | } | |
2658 | ||
f6bba201 DC |
2659 | /* |
2660 | * Enter all inodes for a rename transaction into a sorted array. | |
2661 | */ | |
95afcf5c | 2662 | #define __XFS_SORT_INODES 5 |
f6bba201 DC |
2663 | STATIC void |
2664 | xfs_sort_for_rename( | |
95afcf5c DC |
2665 | struct xfs_inode *dp1, /* in: old (source) directory inode */ |
2666 | struct xfs_inode *dp2, /* in: new (target) directory inode */ | |
2667 | struct xfs_inode *ip1, /* in: inode of old entry */ | |
2668 | struct xfs_inode *ip2, /* in: inode of new entry */ | |
2669 | struct xfs_inode *wip, /* in: whiteout inode */ | |
2670 | struct xfs_inode **i_tab,/* out: sorted array of inodes */ | |
2671 | int *num_inodes) /* in/out: inodes in array */ | |
f6bba201 | 2672 | { |
f6bba201 DC |
2673 | int i, j; |
2674 | ||
95afcf5c DC |
2675 | ASSERT(*num_inodes == __XFS_SORT_INODES); |
2676 | memset(i_tab, 0, *num_inodes * sizeof(struct xfs_inode *)); | |
2677 | ||
f6bba201 DC |
2678 | /* |
2679 | * i_tab contains a list of pointers to inodes. We initialize | |
2680 | * the table here & we'll sort it. We will then use it to | |
2681 | * order the acquisition of the inode locks. | |
2682 | * | |
2683 | * Note that the table may contain duplicates. e.g., dp1 == dp2. | |
2684 | */ | |
95afcf5c DC |
2685 | i = 0; |
2686 | i_tab[i++] = dp1; | |
2687 | i_tab[i++] = dp2; | |
2688 | i_tab[i++] = ip1; | |
2689 | if (ip2) | |
2690 | i_tab[i++] = ip2; | |
2691 | if (wip) | |
2692 | i_tab[i++] = wip; | |
2693 | *num_inodes = i; | |
f6bba201 DC |
2694 | |
2695 | /* | |
2696 | * Sort the elements via bubble sort. (Remember, there are at | |
95afcf5c | 2697 | * most 5 elements to sort, so this is adequate.) |
f6bba201 DC |
2698 | */ |
2699 | for (i = 0; i < *num_inodes; i++) { | |
2700 | for (j = 1; j < *num_inodes; j++) { | |
2701 | if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { | |
95afcf5c | 2702 | struct xfs_inode *temp = i_tab[j]; |
f6bba201 DC |
2703 | i_tab[j] = i_tab[j-1]; |
2704 | i_tab[j-1] = temp; | |
2705 | } | |
2706 | } | |
2707 | } | |
2708 | } | |
2709 | ||
310606b0 DC |
2710 | static int |
2711 | xfs_finish_rename( | |
2712 | struct xfs_trans *tp, | |
2c3234d1 | 2713 | struct xfs_defer_ops *dfops) |
310606b0 | 2714 | { |
310606b0 DC |
2715 | int error; |
2716 | ||
2717 | /* | |
2718 | * If this is a synchronous mount, make sure that the rename transaction | |
2719 | * goes to disk before returning to the user. | |
2720 | */ | |
2721 | if (tp->t_mountp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) | |
2722 | xfs_trans_set_sync(tp); | |
2723 | ||
2c3234d1 | 2724 | error = xfs_defer_finish(&tp, dfops, NULL); |
310606b0 | 2725 | if (error) { |
2c3234d1 | 2726 | xfs_defer_cancel(dfops); |
4906e215 | 2727 | xfs_trans_cancel(tp); |
310606b0 DC |
2728 | return error; |
2729 | } | |
2730 | ||
70393313 | 2731 | return xfs_trans_commit(tp); |
310606b0 DC |
2732 | } |
2733 | ||
d31a1825 CM |
2734 | /* |
2735 | * xfs_cross_rename() | |
2736 | * | |
2737 | * responsible for handling RENAME_EXCHANGE flag in renameat2() sytemcall | |
2738 | */ | |
2739 | STATIC int | |
2740 | xfs_cross_rename( | |
2741 | struct xfs_trans *tp, | |
2742 | struct xfs_inode *dp1, | |
2743 | struct xfs_name *name1, | |
2744 | struct xfs_inode *ip1, | |
2745 | struct xfs_inode *dp2, | |
2746 | struct xfs_name *name2, | |
2747 | struct xfs_inode *ip2, | |
2c3234d1 | 2748 | struct xfs_defer_ops *dfops, |
d31a1825 CM |
2749 | xfs_fsblock_t *first_block, |
2750 | int spaceres) | |
2751 | { | |
2752 | int error = 0; | |
2753 | int ip1_flags = 0; | |
2754 | int ip2_flags = 0; | |
2755 | int dp2_flags = 0; | |
2756 | ||
2757 | /* Swap inode number for dirent in first parent */ | |
2758 | error = xfs_dir_replace(tp, dp1, name1, | |
2759 | ip2->i_ino, | |
2c3234d1 | 2760 | first_block, dfops, spaceres); |
d31a1825 | 2761 | if (error) |
eeacd321 | 2762 | goto out_trans_abort; |
d31a1825 CM |
2763 | |
2764 | /* Swap inode number for dirent in second parent */ | |
2765 | error = xfs_dir_replace(tp, dp2, name2, | |
2766 | ip1->i_ino, | |
2c3234d1 | 2767 | first_block, dfops, spaceres); |
d31a1825 | 2768 | if (error) |
eeacd321 | 2769 | goto out_trans_abort; |
d31a1825 CM |
2770 | |
2771 | /* | |
2772 | * If we're renaming one or more directories across different parents, | |
2773 | * update the respective ".." entries (and link counts) to match the new | |
2774 | * parents. | |
2775 | */ | |
2776 | if (dp1 != dp2) { | |
2777 | dp2_flags = XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2778 | ||
c19b3b05 | 2779 | if (S_ISDIR(VFS_I(ip2)->i_mode)) { |
d31a1825 CM |
2780 | error = xfs_dir_replace(tp, ip2, &xfs_name_dotdot, |
2781 | dp1->i_ino, first_block, | |
2c3234d1 | 2782 | dfops, spaceres); |
d31a1825 | 2783 | if (error) |
eeacd321 | 2784 | goto out_trans_abort; |
d31a1825 CM |
2785 | |
2786 | /* transfer ip2 ".." reference to dp1 */ | |
c19b3b05 | 2787 | if (!S_ISDIR(VFS_I(ip1)->i_mode)) { |
d31a1825 CM |
2788 | error = xfs_droplink(tp, dp2); |
2789 | if (error) | |
eeacd321 | 2790 | goto out_trans_abort; |
d31a1825 CM |
2791 | error = xfs_bumplink(tp, dp1); |
2792 | if (error) | |
eeacd321 | 2793 | goto out_trans_abort; |
d31a1825 CM |
2794 | } |
2795 | ||
2796 | /* | |
2797 | * Although ip1 isn't changed here, userspace needs | |
2798 | * to be warned about the change, so that applications | |
2799 | * relying on it (like backup ones), will properly | |
2800 | * notify the change | |
2801 | */ | |
2802 | ip1_flags |= XFS_ICHGTIME_CHG; | |
2803 | ip2_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2804 | } | |
2805 | ||
c19b3b05 | 2806 | if (S_ISDIR(VFS_I(ip1)->i_mode)) { |
d31a1825 CM |
2807 | error = xfs_dir_replace(tp, ip1, &xfs_name_dotdot, |
2808 | dp2->i_ino, first_block, | |
2c3234d1 | 2809 | dfops, spaceres); |
d31a1825 | 2810 | if (error) |
eeacd321 | 2811 | goto out_trans_abort; |
d31a1825 CM |
2812 | |
2813 | /* transfer ip1 ".." reference to dp2 */ | |
c19b3b05 | 2814 | if (!S_ISDIR(VFS_I(ip2)->i_mode)) { |
d31a1825 CM |
2815 | error = xfs_droplink(tp, dp1); |
2816 | if (error) | |
eeacd321 | 2817 | goto out_trans_abort; |
d31a1825 CM |
2818 | error = xfs_bumplink(tp, dp2); |
2819 | if (error) | |
eeacd321 | 2820 | goto out_trans_abort; |
d31a1825 CM |
2821 | } |
2822 | ||
2823 | /* | |
2824 | * Although ip2 isn't changed here, userspace needs | |
2825 | * to be warned about the change, so that applications | |
2826 | * relying on it (like backup ones), will properly | |
2827 | * notify the change | |
2828 | */ | |
2829 | ip1_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
2830 | ip2_flags |= XFS_ICHGTIME_CHG; | |
2831 | } | |
2832 | } | |
2833 | ||
2834 | if (ip1_flags) { | |
2835 | xfs_trans_ichgtime(tp, ip1, ip1_flags); | |
2836 | xfs_trans_log_inode(tp, ip1, XFS_ILOG_CORE); | |
2837 | } | |
2838 | if (ip2_flags) { | |
2839 | xfs_trans_ichgtime(tp, ip2, ip2_flags); | |
2840 | xfs_trans_log_inode(tp, ip2, XFS_ILOG_CORE); | |
2841 | } | |
2842 | if (dp2_flags) { | |
2843 | xfs_trans_ichgtime(tp, dp2, dp2_flags); | |
2844 | xfs_trans_log_inode(tp, dp2, XFS_ILOG_CORE); | |
2845 | } | |
2846 | xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2847 | xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE); | |
2c3234d1 | 2848 | return xfs_finish_rename(tp, dfops); |
eeacd321 DC |
2849 | |
2850 | out_trans_abort: | |
2c3234d1 | 2851 | xfs_defer_cancel(dfops); |
4906e215 | 2852 | xfs_trans_cancel(tp); |
d31a1825 CM |
2853 | return error; |
2854 | } | |
2855 | ||
7dcf5c3e DC |
2856 | /* |
2857 | * xfs_rename_alloc_whiteout() | |
2858 | * | |
2859 | * Return a referenced, unlinked, unlocked inode that that can be used as a | |
2860 | * whiteout in a rename transaction. We use a tmpfile inode here so that if we | |
2861 | * crash between allocating the inode and linking it into the rename transaction | |
2862 | * recovery will free the inode and we won't leak it. | |
2863 | */ | |
2864 | static int | |
2865 | xfs_rename_alloc_whiteout( | |
2866 | struct xfs_inode *dp, | |
2867 | struct xfs_inode **wip) | |
2868 | { | |
2869 | struct xfs_inode *tmpfile; | |
2870 | int error; | |
2871 | ||
2872 | error = xfs_create_tmpfile(dp, NULL, S_IFCHR | WHITEOUT_MODE, &tmpfile); | |
2873 | if (error) | |
2874 | return error; | |
2875 | ||
22419ac9 BF |
2876 | /* |
2877 | * Prepare the tmpfile inode as if it were created through the VFS. | |
2878 | * Otherwise, the link increment paths will complain about nlink 0->1. | |
2879 | * Drop the link count as done by d_tmpfile(), complete the inode setup | |
2880 | * and flag it as linkable. | |
2881 | */ | |
2882 | drop_nlink(VFS_I(tmpfile)); | |
2b3d1d41 | 2883 | xfs_setup_iops(tmpfile); |
7dcf5c3e DC |
2884 | xfs_finish_inode_setup(tmpfile); |
2885 | VFS_I(tmpfile)->i_state |= I_LINKABLE; | |
2886 | ||
2887 | *wip = tmpfile; | |
2888 | return 0; | |
2889 | } | |
2890 | ||
f6bba201 DC |
2891 | /* |
2892 | * xfs_rename | |
2893 | */ | |
2894 | int | |
2895 | xfs_rename( | |
7dcf5c3e DC |
2896 | struct xfs_inode *src_dp, |
2897 | struct xfs_name *src_name, | |
2898 | struct xfs_inode *src_ip, | |
2899 | struct xfs_inode *target_dp, | |
2900 | struct xfs_name *target_name, | |
2901 | struct xfs_inode *target_ip, | |
2902 | unsigned int flags) | |
f6bba201 | 2903 | { |
7dcf5c3e DC |
2904 | struct xfs_mount *mp = src_dp->i_mount; |
2905 | struct xfs_trans *tp; | |
2c3234d1 | 2906 | struct xfs_defer_ops dfops; |
7dcf5c3e DC |
2907 | xfs_fsblock_t first_block; |
2908 | struct xfs_inode *wip = NULL; /* whiteout inode */ | |
2909 | struct xfs_inode *inodes[__XFS_SORT_INODES]; | |
2910 | int num_inodes = __XFS_SORT_INODES; | |
2b93681f | 2911 | bool new_parent = (src_dp != target_dp); |
c19b3b05 | 2912 | bool src_is_directory = S_ISDIR(VFS_I(src_ip)->i_mode); |
7dcf5c3e DC |
2913 | int spaceres; |
2914 | int error; | |
f6bba201 DC |
2915 | |
2916 | trace_xfs_rename(src_dp, target_dp, src_name, target_name); | |
2917 | ||
eeacd321 DC |
2918 | if ((flags & RENAME_EXCHANGE) && !target_ip) |
2919 | return -EINVAL; | |
2920 | ||
7dcf5c3e DC |
2921 | /* |
2922 | * If we are doing a whiteout operation, allocate the whiteout inode | |
2923 | * we will be placing at the target and ensure the type is set | |
2924 | * appropriately. | |
2925 | */ | |
2926 | if (flags & RENAME_WHITEOUT) { | |
2927 | ASSERT(!(flags & (RENAME_NOREPLACE | RENAME_EXCHANGE))); | |
2928 | error = xfs_rename_alloc_whiteout(target_dp, &wip); | |
2929 | if (error) | |
2930 | return error; | |
2931 | ||
2932 | /* setup target dirent info as whiteout */ | |
2933 | src_name->type = XFS_DIR3_FT_CHRDEV; | |
2934 | } | |
f6bba201 | 2935 | |
7dcf5c3e | 2936 | xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, wip, |
f6bba201 DC |
2937 | inodes, &num_inodes); |
2938 | ||
f6bba201 | 2939 | spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len); |
253f4911 | 2940 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, spaceres, 0, 0, &tp); |
2451337d | 2941 | if (error == -ENOSPC) { |
f6bba201 | 2942 | spaceres = 0; |
253f4911 CH |
2943 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, 0, 0, 0, |
2944 | &tp); | |
f6bba201 | 2945 | } |
445883e8 | 2946 | if (error) |
253f4911 | 2947 | goto out_release_wip; |
f6bba201 DC |
2948 | |
2949 | /* | |
2950 | * Attach the dquots to the inodes | |
2951 | */ | |
2952 | error = xfs_qm_vop_rename_dqattach(inodes); | |
445883e8 DC |
2953 | if (error) |
2954 | goto out_trans_cancel; | |
f6bba201 DC |
2955 | |
2956 | /* | |
2957 | * Lock all the participating inodes. Depending upon whether | |
2958 | * the target_name exists in the target directory, and | |
2959 | * whether the target directory is the same as the source | |
2960 | * directory, we can lock from 2 to 4 inodes. | |
2961 | */ | |
2962 | xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL); | |
2963 | ||
2964 | /* | |
2965 | * Join all the inodes to the transaction. From this point on, | |
2966 | * we can rely on either trans_commit or trans_cancel to unlock | |
2967 | * them. | |
2968 | */ | |
65523218 | 2969 | xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); |
f6bba201 | 2970 | if (new_parent) |
65523218 | 2971 | xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); |
f6bba201 DC |
2972 | xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); |
2973 | if (target_ip) | |
2974 | xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); | |
7dcf5c3e DC |
2975 | if (wip) |
2976 | xfs_trans_ijoin(tp, wip, XFS_ILOCK_EXCL); | |
f6bba201 DC |
2977 | |
2978 | /* | |
2979 | * If we are using project inheritance, we only allow renames | |
2980 | * into our tree when the project IDs are the same; else the | |
2981 | * tree quota mechanism would be circumvented. | |
2982 | */ | |
2983 | if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2984 | (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) { | |
2451337d | 2985 | error = -EXDEV; |
445883e8 | 2986 | goto out_trans_cancel; |
f6bba201 DC |
2987 | } |
2988 | ||
2c3234d1 | 2989 | xfs_defer_init(&dfops, &first_block); |
445883e8 | 2990 | |
eeacd321 DC |
2991 | /* RENAME_EXCHANGE is unique from here on. */ |
2992 | if (flags & RENAME_EXCHANGE) | |
2993 | return xfs_cross_rename(tp, src_dp, src_name, src_ip, | |
2994 | target_dp, target_name, target_ip, | |
2c3234d1 | 2995 | &dfops, &first_block, spaceres); |
d31a1825 | 2996 | |
f6bba201 DC |
2997 | /* |
2998 | * Set up the target. | |
2999 | */ | |
3000 | if (target_ip == NULL) { | |
3001 | /* | |
3002 | * If there's no space reservation, check the entry will | |
3003 | * fit before actually inserting it. | |
3004 | */ | |
94f3cad5 ES |
3005 | if (!spaceres) { |
3006 | error = xfs_dir_canenter(tp, target_dp, target_name); | |
3007 | if (error) | |
445883e8 | 3008 | goto out_trans_cancel; |
94f3cad5 | 3009 | } |
f6bba201 DC |
3010 | /* |
3011 | * If target does not exist and the rename crosses | |
3012 | * directories, adjust the target directory link count | |
3013 | * to account for the ".." reference from the new entry. | |
3014 | */ | |
3015 | error = xfs_dir_createname(tp, target_dp, target_name, | |
3016 | src_ip->i_ino, &first_block, | |
2c3234d1 | 3017 | &dfops, spaceres); |
f6bba201 | 3018 | if (error) |
4906e215 | 3019 | goto out_bmap_cancel; |
f6bba201 DC |
3020 | |
3021 | xfs_trans_ichgtime(tp, target_dp, | |
3022 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3023 | ||
3024 | if (new_parent && src_is_directory) { | |
3025 | error = xfs_bumplink(tp, target_dp); | |
3026 | if (error) | |
4906e215 | 3027 | goto out_bmap_cancel; |
f6bba201 DC |
3028 | } |
3029 | } else { /* target_ip != NULL */ | |
3030 | /* | |
3031 | * If target exists and it's a directory, check that both | |
3032 | * target and source are directories and that target can be | |
3033 | * destroyed, or that neither is a directory. | |
3034 | */ | |
c19b3b05 | 3035 | if (S_ISDIR(VFS_I(target_ip)->i_mode)) { |
f6bba201 DC |
3036 | /* |
3037 | * Make sure target dir is empty. | |
3038 | */ | |
3039 | if (!(xfs_dir_isempty(target_ip)) || | |
54d7b5c1 | 3040 | (VFS_I(target_ip)->i_nlink > 2)) { |
2451337d | 3041 | error = -EEXIST; |
445883e8 | 3042 | goto out_trans_cancel; |
f6bba201 DC |
3043 | } |
3044 | } | |
3045 | ||
3046 | /* | |
3047 | * Link the source inode under the target name. | |
3048 | * If the source inode is a directory and we are moving | |
3049 | * it across directories, its ".." entry will be | |
3050 | * inconsistent until we replace that down below. | |
3051 | * | |
3052 | * In case there is already an entry with the same | |
3053 | * name at the destination directory, remove it first. | |
3054 | */ | |
3055 | error = xfs_dir_replace(tp, target_dp, target_name, | |
3056 | src_ip->i_ino, | |
2c3234d1 | 3057 | &first_block, &dfops, spaceres); |
f6bba201 | 3058 | if (error) |
4906e215 | 3059 | goto out_bmap_cancel; |
f6bba201 DC |
3060 | |
3061 | xfs_trans_ichgtime(tp, target_dp, | |
3062 | XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3063 | ||
3064 | /* | |
3065 | * Decrement the link count on the target since the target | |
3066 | * dir no longer points to it. | |
3067 | */ | |
3068 | error = xfs_droplink(tp, target_ip); | |
3069 | if (error) | |
4906e215 | 3070 | goto out_bmap_cancel; |
f6bba201 DC |
3071 | |
3072 | if (src_is_directory) { | |
3073 | /* | |
3074 | * Drop the link from the old "." entry. | |
3075 | */ | |
3076 | error = xfs_droplink(tp, target_ip); | |
3077 | if (error) | |
4906e215 | 3078 | goto out_bmap_cancel; |
f6bba201 DC |
3079 | } |
3080 | } /* target_ip != NULL */ | |
3081 | ||
3082 | /* | |
3083 | * Remove the source. | |
3084 | */ | |
3085 | if (new_parent && src_is_directory) { | |
3086 | /* | |
3087 | * Rewrite the ".." entry to point to the new | |
3088 | * directory. | |
3089 | */ | |
3090 | error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot, | |
3091 | target_dp->i_ino, | |
2c3234d1 | 3092 | &first_block, &dfops, spaceres); |
2451337d | 3093 | ASSERT(error != -EEXIST); |
f6bba201 | 3094 | if (error) |
4906e215 | 3095 | goto out_bmap_cancel; |
f6bba201 DC |
3096 | } |
3097 | ||
3098 | /* | |
3099 | * We always want to hit the ctime on the source inode. | |
3100 | * | |
3101 | * This isn't strictly required by the standards since the source | |
3102 | * inode isn't really being changed, but old unix file systems did | |
3103 | * it and some incremental backup programs won't work without it. | |
3104 | */ | |
3105 | xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); | |
3106 | xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); | |
3107 | ||
3108 | /* | |
3109 | * Adjust the link count on src_dp. This is necessary when | |
3110 | * renaming a directory, either within one parent when | |
3111 | * the target existed, or across two parent directories. | |
3112 | */ | |
3113 | if (src_is_directory && (new_parent || target_ip != NULL)) { | |
3114 | ||
3115 | /* | |
3116 | * Decrement link count on src_directory since the | |
3117 | * entry that's moved no longer points to it. | |
3118 | */ | |
3119 | error = xfs_droplink(tp, src_dp); | |
3120 | if (error) | |
4906e215 | 3121 | goto out_bmap_cancel; |
f6bba201 DC |
3122 | } |
3123 | ||
7dcf5c3e DC |
3124 | /* |
3125 | * For whiteouts, we only need to update the source dirent with the | |
3126 | * inode number of the whiteout inode rather than removing it | |
3127 | * altogether. | |
3128 | */ | |
3129 | if (wip) { | |
3130 | error = xfs_dir_replace(tp, src_dp, src_name, wip->i_ino, | |
2c3234d1 | 3131 | &first_block, &dfops, spaceres); |
7dcf5c3e DC |
3132 | } else |
3133 | error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino, | |
2c3234d1 | 3134 | &first_block, &dfops, spaceres); |
f6bba201 | 3135 | if (error) |
4906e215 | 3136 | goto out_bmap_cancel; |
f6bba201 DC |
3137 | |
3138 | /* | |
7dcf5c3e DC |
3139 | * For whiteouts, we need to bump the link count on the whiteout inode. |
3140 | * This means that failures all the way up to this point leave the inode | |
3141 | * on the unlinked list and so cleanup is a simple matter of dropping | |
3142 | * the remaining reference to it. If we fail here after bumping the link | |
3143 | * count, we're shutting down the filesystem so we'll never see the | |
3144 | * intermediate state on disk. | |
f6bba201 | 3145 | */ |
7dcf5c3e | 3146 | if (wip) { |
54d7b5c1 | 3147 | ASSERT(VFS_I(wip)->i_nlink == 0); |
7dcf5c3e DC |
3148 | error = xfs_bumplink(tp, wip); |
3149 | if (error) | |
4906e215 | 3150 | goto out_bmap_cancel; |
7dcf5c3e DC |
3151 | error = xfs_iunlink_remove(tp, wip); |
3152 | if (error) | |
4906e215 | 3153 | goto out_bmap_cancel; |
7dcf5c3e | 3154 | xfs_trans_log_inode(tp, wip, XFS_ILOG_CORE); |
f6bba201 | 3155 | |
7dcf5c3e DC |
3156 | /* |
3157 | * Now we have a real link, clear the "I'm a tmpfile" state | |
3158 | * flag from the inode so it doesn't accidentally get misused in | |
3159 | * future. | |
3160 | */ | |
3161 | VFS_I(wip)->i_state &= ~I_LINKABLE; | |
f6bba201 DC |
3162 | } |
3163 | ||
f6bba201 DC |
3164 | xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
3165 | xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); | |
3166 | if (new_parent) | |
3167 | xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); | |
f6bba201 | 3168 | |
2c3234d1 | 3169 | error = xfs_finish_rename(tp, &dfops); |
7dcf5c3e DC |
3170 | if (wip) |
3171 | IRELE(wip); | |
3172 | return error; | |
f6bba201 | 3173 | |
445883e8 | 3174 | out_bmap_cancel: |
2c3234d1 | 3175 | xfs_defer_cancel(&dfops); |
445883e8 | 3176 | out_trans_cancel: |
4906e215 | 3177 | xfs_trans_cancel(tp); |
253f4911 | 3178 | out_release_wip: |
7dcf5c3e DC |
3179 | if (wip) |
3180 | IRELE(wip); | |
f6bba201 DC |
3181 | return error; |
3182 | } | |
3183 | ||
5c4d97d0 DC |
3184 | STATIC int |
3185 | xfs_iflush_cluster( | |
19429363 DC |
3186 | struct xfs_inode *ip, |
3187 | struct xfs_buf *bp) | |
1da177e4 | 3188 | { |
19429363 | 3189 | struct xfs_mount *mp = ip->i_mount; |
5c4d97d0 DC |
3190 | struct xfs_perag *pag; |
3191 | unsigned long first_index, mask; | |
3192 | unsigned long inodes_per_cluster; | |
19429363 DC |
3193 | int cilist_size; |
3194 | struct xfs_inode **cilist; | |
3195 | struct xfs_inode *cip; | |
5c4d97d0 DC |
3196 | int nr_found; |
3197 | int clcount = 0; | |
3198 | int bufwasdelwri; | |
1da177e4 | 3199 | int i; |
1da177e4 | 3200 | |
5c4d97d0 | 3201 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); |
1da177e4 | 3202 | |
0f49efd8 | 3203 | inodes_per_cluster = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; |
19429363 DC |
3204 | cilist_size = inodes_per_cluster * sizeof(xfs_inode_t *); |
3205 | cilist = kmem_alloc(cilist_size, KM_MAYFAIL|KM_NOFS); | |
3206 | if (!cilist) | |
5c4d97d0 | 3207 | goto out_put; |
1da177e4 | 3208 | |
0f49efd8 | 3209 | mask = ~(((mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog)) - 1); |
5c4d97d0 DC |
3210 | first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; |
3211 | rcu_read_lock(); | |
3212 | /* really need a gang lookup range call here */ | |
19429363 | 3213 | nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)cilist, |
5c4d97d0 DC |
3214 | first_index, inodes_per_cluster); |
3215 | if (nr_found == 0) | |
3216 | goto out_free; | |
3217 | ||
3218 | for (i = 0; i < nr_found; i++) { | |
19429363 DC |
3219 | cip = cilist[i]; |
3220 | if (cip == ip) | |
bad55843 | 3221 | continue; |
1a3e8f3d DC |
3222 | |
3223 | /* | |
3224 | * because this is an RCU protected lookup, we could find a | |
3225 | * recently freed or even reallocated inode during the lookup. | |
3226 | * We need to check under the i_flags_lock for a valid inode | |
3227 | * here. Skip it if it is not valid or the wrong inode. | |
3228 | */ | |
19429363 DC |
3229 | spin_lock(&cip->i_flags_lock); |
3230 | if (!cip->i_ino || | |
3231 | __xfs_iflags_test(cip, XFS_ISTALE)) { | |
3232 | spin_unlock(&cip->i_flags_lock); | |
1a3e8f3d DC |
3233 | continue; |
3234 | } | |
5a90e53e DC |
3235 | |
3236 | /* | |
3237 | * Once we fall off the end of the cluster, no point checking | |
3238 | * any more inodes in the list because they will also all be | |
3239 | * outside the cluster. | |
3240 | */ | |
19429363 DC |
3241 | if ((XFS_INO_TO_AGINO(mp, cip->i_ino) & mask) != first_index) { |
3242 | spin_unlock(&cip->i_flags_lock); | |
5a90e53e DC |
3243 | break; |
3244 | } | |
19429363 | 3245 | spin_unlock(&cip->i_flags_lock); |
1a3e8f3d | 3246 | |
bad55843 DC |
3247 | /* |
3248 | * Do an un-protected check to see if the inode is dirty and | |
3249 | * is a candidate for flushing. These checks will be repeated | |
3250 | * later after the appropriate locks are acquired. | |
3251 | */ | |
19429363 | 3252 | if (xfs_inode_clean(cip) && xfs_ipincount(cip) == 0) |
bad55843 | 3253 | continue; |
bad55843 DC |
3254 | |
3255 | /* | |
3256 | * Try to get locks. If any are unavailable or it is pinned, | |
3257 | * then this inode cannot be flushed and is skipped. | |
3258 | */ | |
3259 | ||
19429363 | 3260 | if (!xfs_ilock_nowait(cip, XFS_ILOCK_SHARED)) |
bad55843 | 3261 | continue; |
19429363 DC |
3262 | if (!xfs_iflock_nowait(cip)) { |
3263 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3264 | continue; |
3265 | } | |
19429363 DC |
3266 | if (xfs_ipincount(cip)) { |
3267 | xfs_ifunlock(cip); | |
3268 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3269 | continue; |
3270 | } | |
3271 | ||
8a17d7dd DC |
3272 | |
3273 | /* | |
3274 | * Check the inode number again, just to be certain we are not | |
3275 | * racing with freeing in xfs_reclaim_inode(). See the comments | |
3276 | * in that function for more information as to why the initial | |
3277 | * check is not sufficient. | |
3278 | */ | |
19429363 DC |
3279 | if (!cip->i_ino) { |
3280 | xfs_ifunlock(cip); | |
3281 | xfs_iunlock(cip, XFS_ILOCK_SHARED); | |
bad55843 DC |
3282 | continue; |
3283 | } | |
3284 | ||
3285 | /* | |
3286 | * arriving here means that this inode can be flushed. First | |
3287 | * re-check that it's dirty before flushing. | |
3288 | */ | |
19429363 | 3289 | if (!xfs_inode_clean(cip)) { |
33540408 | 3290 | int error; |
19429363 | 3291 | error = xfs_iflush_int(cip, bp); |
bad55843 | 3292 | if (error) { |
19429363 | 3293 | xfs_iunlock(cip, XFS_ILOCK_SHARED); |
bad55843 DC |
3294 | goto cluster_corrupt_out; |
3295 | } | |
3296 | clcount++; | |
3297 | } else { | |
19429363 | 3298 | xfs_ifunlock(cip); |
bad55843 | 3299 | } |
19429363 | 3300 | xfs_iunlock(cip, XFS_ILOCK_SHARED); |
bad55843 DC |
3301 | } |
3302 | ||
3303 | if (clcount) { | |
ff6d6af2 BD |
3304 | XFS_STATS_INC(mp, xs_icluster_flushcnt); |
3305 | XFS_STATS_ADD(mp, xs_icluster_flushinode, clcount); | |
bad55843 DC |
3306 | } |
3307 | ||
3308 | out_free: | |
1a3e8f3d | 3309 | rcu_read_unlock(); |
19429363 | 3310 | kmem_free(cilist); |
44b56e0a DC |
3311 | out_put: |
3312 | xfs_perag_put(pag); | |
bad55843 DC |
3313 | return 0; |
3314 | ||
3315 | ||
3316 | cluster_corrupt_out: | |
3317 | /* | |
3318 | * Corruption detected in the clustering loop. Invalidate the | |
3319 | * inode buffer and shut down the filesystem. | |
3320 | */ | |
1a3e8f3d | 3321 | rcu_read_unlock(); |
bad55843 | 3322 | /* |
43ff2122 | 3323 | * Clean up the buffer. If it was delwri, just release it -- |
bad55843 DC |
3324 | * brelse can handle it with no problems. If not, shut down the |
3325 | * filesystem before releasing the buffer. | |
3326 | */ | |
43ff2122 | 3327 | bufwasdelwri = (bp->b_flags & _XBF_DELWRI_Q); |
bad55843 DC |
3328 | if (bufwasdelwri) |
3329 | xfs_buf_relse(bp); | |
3330 | ||
3331 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
3332 | ||
3333 | if (!bufwasdelwri) { | |
3334 | /* | |
3335 | * Just like incore_relse: if we have b_iodone functions, | |
3336 | * mark the buffer as an error and call them. Otherwise | |
3337 | * mark it as stale and brelse. | |
3338 | */ | |
cb669ca5 | 3339 | if (bp->b_iodone) { |
b0388bf1 | 3340 | bp->b_flags &= ~XBF_DONE; |
c867cb61 | 3341 | xfs_buf_stale(bp); |
2451337d | 3342 | xfs_buf_ioerror(bp, -EIO); |
e8aaba9a | 3343 | xfs_buf_ioend(bp); |
bad55843 | 3344 | } else { |
c867cb61 | 3345 | xfs_buf_stale(bp); |
bad55843 DC |
3346 | xfs_buf_relse(bp); |
3347 | } | |
3348 | } | |
3349 | ||
3350 | /* | |
3351 | * Unlocks the flush lock | |
3352 | */ | |
19429363 DC |
3353 | xfs_iflush_abort(cip, false); |
3354 | kmem_free(cilist); | |
44b56e0a | 3355 | xfs_perag_put(pag); |
2451337d | 3356 | return -EFSCORRUPTED; |
bad55843 DC |
3357 | } |
3358 | ||
1da177e4 | 3359 | /* |
4c46819a CH |
3360 | * Flush dirty inode metadata into the backing buffer. |
3361 | * | |
3362 | * The caller must have the inode lock and the inode flush lock held. The | |
3363 | * inode lock will still be held upon return to the caller, and the inode | |
3364 | * flush lock will be released after the inode has reached the disk. | |
3365 | * | |
3366 | * The caller must write out the buffer returned in *bpp and release it. | |
1da177e4 LT |
3367 | */ |
3368 | int | |
3369 | xfs_iflush( | |
4c46819a CH |
3370 | struct xfs_inode *ip, |
3371 | struct xfs_buf **bpp) | |
1da177e4 | 3372 | { |
4c46819a | 3373 | struct xfs_mount *mp = ip->i_mount; |
b1438f47 | 3374 | struct xfs_buf *bp = NULL; |
4c46819a | 3375 | struct xfs_dinode *dip; |
1da177e4 | 3376 | int error; |
1da177e4 | 3377 | |
ff6d6af2 | 3378 | XFS_STATS_INC(mp, xs_iflush_count); |
1da177e4 | 3379 | |
579aa9ca | 3380 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 3381 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 3382 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 3383 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
1da177e4 | 3384 | |
4c46819a | 3385 | *bpp = NULL; |
1da177e4 | 3386 | |
1da177e4 LT |
3387 | xfs_iunpin_wait(ip); |
3388 | ||
4b6a4688 DC |
3389 | /* |
3390 | * For stale inodes we cannot rely on the backing buffer remaining | |
3391 | * stale in cache for the remaining life of the stale inode and so | |
475ee413 | 3392 | * xfs_imap_to_bp() below may give us a buffer that no longer contains |
4b6a4688 DC |
3393 | * inodes below. We have to check this after ensuring the inode is |
3394 | * unpinned so that it is safe to reclaim the stale inode after the | |
3395 | * flush call. | |
3396 | */ | |
3397 | if (xfs_iflags_test(ip, XFS_ISTALE)) { | |
3398 | xfs_ifunlock(ip); | |
3399 | return 0; | |
3400 | } | |
3401 | ||
1da177e4 LT |
3402 | /* |
3403 | * This may have been unpinned because the filesystem is shutting | |
3404 | * down forcibly. If that's the case we must not write this inode | |
32ce90a4 CH |
3405 | * to disk, because the log record didn't make it to disk. |
3406 | * | |
3407 | * We also have to remove the log item from the AIL in this case, | |
3408 | * as we wait for an empty AIL as part of the unmount process. | |
1da177e4 LT |
3409 | */ |
3410 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 3411 | error = -EIO; |
32ce90a4 | 3412 | goto abort_out; |
1da177e4 LT |
3413 | } |
3414 | ||
a3f74ffb | 3415 | /* |
b1438f47 DC |
3416 | * Get the buffer containing the on-disk inode. We are doing a try-lock |
3417 | * operation here, so we may get an EAGAIN error. In that case, we | |
3418 | * simply want to return with the inode still dirty. | |
3419 | * | |
3420 | * If we get any other error, we effectively have a corruption situation | |
3421 | * and we cannot flush the inode, so we treat it the same as failing | |
3422 | * xfs_iflush_int(). | |
a3f74ffb | 3423 | */ |
475ee413 CH |
3424 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, XBF_TRYLOCK, |
3425 | 0); | |
b1438f47 | 3426 | if (error == -EAGAIN) { |
a3f74ffb DC |
3427 | xfs_ifunlock(ip); |
3428 | return error; | |
3429 | } | |
b1438f47 DC |
3430 | if (error) |
3431 | goto corrupt_out; | |
a3f74ffb | 3432 | |
1da177e4 LT |
3433 | /* |
3434 | * First flush out the inode that xfs_iflush was called with. | |
3435 | */ | |
3436 | error = xfs_iflush_int(ip, bp); | |
bad55843 | 3437 | if (error) |
1da177e4 | 3438 | goto corrupt_out; |
1da177e4 | 3439 | |
a3f74ffb DC |
3440 | /* |
3441 | * If the buffer is pinned then push on the log now so we won't | |
3442 | * get stuck waiting in the write for too long. | |
3443 | */ | |
811e64c7 | 3444 | if (xfs_buf_ispinned(bp)) |
a14a348b | 3445 | xfs_log_force(mp, 0); |
a3f74ffb | 3446 | |
1da177e4 LT |
3447 | /* |
3448 | * inode clustering: | |
3449 | * see if other inodes can be gathered into this write | |
3450 | */ | |
bad55843 DC |
3451 | error = xfs_iflush_cluster(ip, bp); |
3452 | if (error) | |
3453 | goto cluster_corrupt_out; | |
1da177e4 | 3454 | |
4c46819a CH |
3455 | *bpp = bp; |
3456 | return 0; | |
1da177e4 LT |
3457 | |
3458 | corrupt_out: | |
b1438f47 DC |
3459 | if (bp) |
3460 | xfs_buf_relse(bp); | |
7d04a335 | 3461 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
1da177e4 | 3462 | cluster_corrupt_out: |
2451337d | 3463 | error = -EFSCORRUPTED; |
32ce90a4 | 3464 | abort_out: |
1da177e4 LT |
3465 | /* |
3466 | * Unlocks the flush lock | |
3467 | */ | |
04913fdd | 3468 | xfs_iflush_abort(ip, false); |
32ce90a4 | 3469 | return error; |
1da177e4 LT |
3470 | } |
3471 | ||
1da177e4 LT |
3472 | STATIC int |
3473 | xfs_iflush_int( | |
93848a99 CH |
3474 | struct xfs_inode *ip, |
3475 | struct xfs_buf *bp) | |
1da177e4 | 3476 | { |
93848a99 CH |
3477 | struct xfs_inode_log_item *iip = ip->i_itemp; |
3478 | struct xfs_dinode *dip; | |
3479 | struct xfs_mount *mp = ip->i_mount; | |
1da177e4 | 3480 | |
579aa9ca | 3481 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
474fce06 | 3482 | ASSERT(xfs_isiflocked(ip)); |
1da177e4 | 3483 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
8096b1eb | 3484 | ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)); |
93848a99 | 3485 | ASSERT(iip != NULL && iip->ili_fields != 0); |
263997a6 | 3486 | ASSERT(ip->i_d.di_version > 1); |
1da177e4 | 3487 | |
1da177e4 | 3488 | /* set *dip = inode's place in the buffer */ |
88ee2df7 | 3489 | dip = xfs_buf_offset(bp, ip->i_imap.im_boffset); |
1da177e4 | 3490 | |
69ef921b | 3491 | if (XFS_TEST_ERROR(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC), |
1da177e4 | 3492 | mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { |
6a19d939 DC |
3493 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3494 | "%s: Bad inode %Lu magic number 0x%x, ptr 0x%p", | |
3495 | __func__, ip->i_ino, be16_to_cpu(dip->di_magic), dip); | |
1da177e4 LT |
3496 | goto corrupt_out; |
3497 | } | |
c19b3b05 | 3498 | if (S_ISREG(VFS_I(ip)->i_mode)) { |
1da177e4 LT |
3499 | if (XFS_TEST_ERROR( |
3500 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
3501 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE), | |
3502 | mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) { | |
6a19d939 DC |
3503 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3504 | "%s: Bad regular inode %Lu, ptr 0x%p", | |
3505 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
3506 | goto corrupt_out; |
3507 | } | |
c19b3b05 | 3508 | } else if (S_ISDIR(VFS_I(ip)->i_mode)) { |
1da177e4 LT |
3509 | if (XFS_TEST_ERROR( |
3510 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && | |
3511 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
3512 | (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL), | |
3513 | mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) { | |
6a19d939 DC |
3514 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3515 | "%s: Bad directory inode %Lu, ptr 0x%p", | |
3516 | __func__, ip->i_ino, ip); | |
1da177e4 LT |
3517 | goto corrupt_out; |
3518 | } | |
3519 | } | |
3520 | if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents > | |
3521 | ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5, | |
3522 | XFS_RANDOM_IFLUSH_5)) { | |
6a19d939 DC |
3523 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3524 | "%s: detected corrupt incore inode %Lu, " | |
3525 | "total extents = %d, nblocks = %Ld, ptr 0x%p", | |
3526 | __func__, ip->i_ino, | |
1da177e4 | 3527 | ip->i_d.di_nextents + ip->i_d.di_anextents, |
6a19d939 | 3528 | ip->i_d.di_nblocks, ip); |
1da177e4 LT |
3529 | goto corrupt_out; |
3530 | } | |
3531 | if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize, | |
3532 | mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) { | |
6a19d939 DC |
3533 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
3534 | "%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p", | |
3535 | __func__, ip->i_ino, ip->i_d.di_forkoff, ip); | |
1da177e4 LT |
3536 | goto corrupt_out; |
3537 | } | |
e60896d8 | 3538 | |
1da177e4 | 3539 | /* |
263997a6 | 3540 | * Inode item log recovery for v2 inodes are dependent on the |
e60896d8 DC |
3541 | * di_flushiter count for correct sequencing. We bump the flush |
3542 | * iteration count so we can detect flushes which postdate a log record | |
3543 | * during recovery. This is redundant as we now log every change and | |
3544 | * hence this can't happen but we need to still do it to ensure | |
3545 | * backwards compatibility with old kernels that predate logging all | |
3546 | * inode changes. | |
1da177e4 | 3547 | */ |
e60896d8 DC |
3548 | if (ip->i_d.di_version < 3) |
3549 | ip->i_d.di_flushiter++; | |
1da177e4 | 3550 | |
005c5db8 DW |
3551 | /* Check the inline directory data. */ |
3552 | if (S_ISDIR(VFS_I(ip)->i_mode) && | |
3553 | ip->i_d.di_format == XFS_DINODE_FMT_LOCAL && | |
3554 | xfs_dir2_sf_verify(ip)) | |
3555 | goto corrupt_out; | |
3556 | ||
1da177e4 | 3557 | /* |
3987848c DC |
3558 | * Copy the dirty parts of the inode into the on-disk inode. We always |
3559 | * copy out the core of the inode, because if the inode is dirty at all | |
3560 | * the core must be. | |
1da177e4 | 3561 | */ |
93f958f9 | 3562 | xfs_inode_to_disk(ip, dip, iip->ili_item.li_lsn); |
1da177e4 LT |
3563 | |
3564 | /* Wrap, we never let the log put out DI_MAX_FLUSH */ | |
3565 | if (ip->i_d.di_flushiter == DI_MAX_FLUSH) | |
3566 | ip->i_d.di_flushiter = 0; | |
3567 | ||
005c5db8 DW |
3568 | xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK); |
3569 | if (XFS_IFORK_Q(ip)) | |
3570 | xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK); | |
1da177e4 LT |
3571 | xfs_inobp_check(mp, bp); |
3572 | ||
3573 | /* | |
f5d8d5c4 CH |
3574 | * We've recorded everything logged in the inode, so we'd like to clear |
3575 | * the ili_fields bits so we don't log and flush things unnecessarily. | |
3576 | * However, we can't stop logging all this information until the data | |
3577 | * we've copied into the disk buffer is written to disk. If we did we | |
3578 | * might overwrite the copy of the inode in the log with all the data | |
3579 | * after re-logging only part of it, and in the face of a crash we | |
3580 | * wouldn't have all the data we need to recover. | |
1da177e4 | 3581 | * |
f5d8d5c4 CH |
3582 | * What we do is move the bits to the ili_last_fields field. When |
3583 | * logging the inode, these bits are moved back to the ili_fields field. | |
3584 | * In the xfs_iflush_done() routine we clear ili_last_fields, since we | |
3585 | * know that the information those bits represent is permanently on | |
3586 | * disk. As long as the flush completes before the inode is logged | |
3587 | * again, then both ili_fields and ili_last_fields will be cleared. | |
1da177e4 | 3588 | * |
f5d8d5c4 CH |
3589 | * We can play with the ili_fields bits here, because the inode lock |
3590 | * must be held exclusively in order to set bits there and the flush | |
3591 | * lock protects the ili_last_fields bits. Set ili_logged so the flush | |
3592 | * done routine can tell whether or not to look in the AIL. Also, store | |
3593 | * the current LSN of the inode so that we can tell whether the item has | |
3594 | * moved in the AIL from xfs_iflush_done(). In order to read the lsn we | |
3595 | * need the AIL lock, because it is a 64 bit value that cannot be read | |
3596 | * atomically. | |
1da177e4 | 3597 | */ |
93848a99 CH |
3598 | iip->ili_last_fields = iip->ili_fields; |
3599 | iip->ili_fields = 0; | |
fc0561ce | 3600 | iip->ili_fsync_fields = 0; |
93848a99 | 3601 | iip->ili_logged = 1; |
1da177e4 | 3602 | |
93848a99 CH |
3603 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
3604 | &iip->ili_item.li_lsn); | |
1da177e4 | 3605 | |
93848a99 CH |
3606 | /* |
3607 | * Attach the function xfs_iflush_done to the inode's | |
3608 | * buffer. This will remove the inode from the AIL | |
3609 | * and unlock the inode's flush lock when the inode is | |
3610 | * completely written to disk. | |
3611 | */ | |
3612 | xfs_buf_attach_iodone(bp, xfs_iflush_done, &iip->ili_item); | |
1da177e4 | 3613 | |
93848a99 CH |
3614 | /* generate the checksum. */ |
3615 | xfs_dinode_calc_crc(mp, dip); | |
1da177e4 | 3616 | |
93848a99 CH |
3617 | ASSERT(bp->b_fspriv != NULL); |
3618 | ASSERT(bp->b_iodone != NULL); | |
1da177e4 LT |
3619 | return 0; |
3620 | ||
3621 | corrupt_out: | |
2451337d | 3622 | return -EFSCORRUPTED; |
1da177e4 | 3623 | } |