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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
fde2227c DC |
2 | /* |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
4 | * Copyright (c) 2013 Red Hat, Inc. | |
5 | * All Rights Reserved. | |
fde2227c DC |
6 | */ |
7 | #include "xfs.h" | |
8 | #include "xfs_fs.h" | |
70a9883c | 9 | #include "xfs_shared.h" |
239880ef DC |
10 | #include "xfs_format.h" |
11 | #include "xfs_log_format.h" | |
12 | #include "xfs_trans_resv.h" | |
fde2227c | 13 | #include "xfs_bit.h" |
fde2227c | 14 | #include "xfs_mount.h" |
57062787 | 15 | #include "xfs_da_format.h" |
fde2227c | 16 | #include "xfs_da_btree.h" |
a4fbe6ab | 17 | #include "xfs_inode.h" |
2b74b03c | 18 | #include "xfs_attr.h" |
fde2227c | 19 | #include "xfs_attr_remote.h" |
239880ef | 20 | #include "xfs_trans.h" |
fde2227c | 21 | #include "xfs_bmap.h" |
fde2227c | 22 | #include "xfs_attr_leaf.h" |
fde2227c | 23 | #include "xfs_quota.h" |
4bceb18f | 24 | #include "xfs_dir2.h" |
a5155b87 | 25 | #include "xfs_error.h" |
fde2227c DC |
26 | |
27 | /* | |
e8db2aaf DW |
28 | * Invalidate any incore buffers associated with this remote attribute value |
29 | * extent. We never log remote attribute value buffers, which means that they | |
30 | * won't be attached to a transaction and are therefore safe to mark stale. | |
31 | * The actual bunmapi will be taken care of later. | |
fde2227c DC |
32 | */ |
33 | STATIC int | |
e8db2aaf | 34 | xfs_attr3_rmt_stale( |
fde2227c DC |
35 | struct xfs_inode *dp, |
36 | xfs_dablk_t blkno, | |
37 | int blkcnt) | |
38 | { | |
39 | struct xfs_bmbt_irec map; | |
fde2227c DC |
40 | int nmap; |
41 | int error; | |
42 | ||
43 | /* | |
44 | * Roll through the "value", invalidating the attribute value's | |
45 | * blocks. | |
46 | */ | |
0bb9d159 | 47 | while (blkcnt > 0) { |
fde2227c DC |
48 | /* |
49 | * Try to remember where we decided to put the value. | |
50 | */ | |
51 | nmap = 1; | |
0bb9d159 | 52 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)blkno, blkcnt, |
fde2227c | 53 | &map, &nmap, XFS_BMAPI_ATTRFORK); |
e8db2aaf | 54 | if (error) |
d99831ff | 55 | return error; |
e8db2aaf DW |
56 | if (XFS_IS_CORRUPT(dp->i_mount, nmap != 1)) |
57 | return -EFSCORRUPTED; | |
fde2227c DC |
58 | |
59 | /* | |
e8db2aaf DW |
60 | * Mark any incore buffers for the remote value as stale. We |
61 | * never log remote attr value buffers, so the buffer should be | |
62 | * easy to kill. | |
fde2227c | 63 | */ |
e8db2aaf DW |
64 | error = xfs_attr_rmtval_stale(dp, &map, 0); |
65 | if (error) | |
66 | return error; | |
fde2227c | 67 | |
0bb9d159 DW |
68 | blkno += map.br_blockcount; |
69 | blkcnt -= map.br_blockcount; | |
fde2227c DC |
70 | } |
71 | ||
d99831ff | 72 | return 0; |
fde2227c DC |
73 | } |
74 | ||
75 | /* | |
76 | * Invalidate all of the "remote" value regions pointed to by a particular | |
77 | * leaf block. | |
78 | * Note that we must release the lock on the buffer so that we are not | |
79 | * caught holding something that the logging code wants to flush to disk. | |
80 | */ | |
81 | STATIC int | |
82 | xfs_attr3_leaf_inactive( | |
0bb9d159 DW |
83 | struct xfs_trans **trans, |
84 | struct xfs_inode *dp, | |
85 | struct xfs_buf *bp) | |
fde2227c | 86 | { |
0bb9d159 DW |
87 | struct xfs_attr3_icleaf_hdr ichdr; |
88 | struct xfs_mount *mp = bp->b_mount; | |
89 | struct xfs_attr_leafblock *leaf = bp->b_addr; | |
90 | struct xfs_attr_leaf_entry *entry; | |
fde2227c | 91 | struct xfs_attr_leaf_name_remote *name_rmt; |
54027a49 | 92 | int error = 0; |
0bb9d159 | 93 | int i; |
fde2227c | 94 | |
2f661241 | 95 | xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf); |
fde2227c DC |
96 | |
97 | /* | |
0bb9d159 DW |
98 | * Find the remote value extents for this leaf and invalidate their |
99 | * incore buffers. | |
fde2227c | 100 | */ |
fde2227c DC |
101 | entry = xfs_attr3_leaf_entryp(leaf); |
102 | for (i = 0; i < ichdr.count; entry++, i++) { | |
0bb9d159 | 103 | int blkcnt; |
fde2227c | 104 | |
0bb9d159 DW |
105 | if (!entry->nameidx || (entry->flags & XFS_ATTR_LOCAL)) |
106 | continue; | |
fde2227c | 107 | |
0bb9d159 DW |
108 | name_rmt = xfs_attr3_leaf_name_remote(leaf, i); |
109 | if (!name_rmt->valueblk) | |
110 | continue; | |
fde2227c | 111 | |
0bb9d159 DW |
112 | blkcnt = xfs_attr3_rmt_blocks(dp->i_mount, |
113 | be32_to_cpu(name_rmt->valuelen)); | |
114 | error = xfs_attr3_rmt_stale(dp, | |
115 | be32_to_cpu(name_rmt->valueblk), blkcnt); | |
116 | if (error) | |
117 | goto err; | |
fde2227c DC |
118 | } |
119 | ||
0bb9d159 DW |
120 | xfs_trans_brelse(*trans, bp); |
121 | err: | |
fde2227c DC |
122 | return error; |
123 | } | |
124 | ||
125 | /* | |
126 | * Recurse (gasp!) through the attribute nodes until we find leaves. | |
127 | * We're doing a depth-first traversal in order to invalidate everything. | |
128 | */ | |
129 | STATIC int | |
130 | xfs_attr3_node_inactive( | |
51908ca7 CH |
131 | struct xfs_trans **trans, |
132 | struct xfs_inode *dp, | |
133 | struct xfs_buf *bp, | |
134 | int level) | |
fde2227c | 135 | { |
2911edb6 | 136 | struct xfs_mount *mp = dp->i_mount; |
51908ca7 CH |
137 | struct xfs_da_blkinfo *info; |
138 | xfs_dablk_t child_fsb; | |
139 | xfs_daddr_t parent_blkno, child_blkno; | |
140 | struct xfs_buf *child_bp; | |
fde2227c | 141 | struct xfs_da3_icnode_hdr ichdr; |
51908ca7 | 142 | int error, i; |
fde2227c DC |
143 | |
144 | /* | |
145 | * Since this code is recursive (gasp!) we must protect ourselves. | |
146 | */ | |
147 | if (level > XFS_DA_NODE_MAXDEPTH) { | |
8d57c216 | 148 | xfs_buf_mark_corrupt(bp); |
496b9bcd | 149 | xfs_trans_brelse(*trans, bp); /* no locks for later trans */ |
c2414ad6 | 150 | return -EFSCORRUPTED; |
fde2227c DC |
151 | } |
152 | ||
51908ca7 | 153 | xfs_da3_node_hdr_from_disk(dp->i_mount, &ichdr, bp->b_addr); |
9343ee76 | 154 | parent_blkno = xfs_buf_daddr(bp); |
fde2227c DC |
155 | if (!ichdr.count) { |
156 | xfs_trans_brelse(*trans, bp); | |
157 | return 0; | |
158 | } | |
51908ca7 | 159 | child_fsb = be32_to_cpu(ichdr.btree[0].before); |
fde2227c | 160 | xfs_trans_brelse(*trans, bp); /* no locks for later trans */ |
95ff0363 | 161 | bp = NULL; |
fde2227c DC |
162 | |
163 | /* | |
164 | * If this is the node level just above the leaves, simply loop | |
165 | * over the leaves removing all of them. If this is higher up | |
166 | * in the tree, recurse downward. | |
167 | */ | |
168 | for (i = 0; i < ichdr.count; i++) { | |
169 | /* | |
170 | * Read the subsidiary block to see what we have to work with. | |
171 | * Don't do this in a transaction. This is a depth-first | |
172 | * traversal of the tree so we may deal with many blocks | |
173 | * before we come back to this one. | |
174 | */ | |
02c57f0a | 175 | error = xfs_da3_node_read(*trans, dp, child_fsb, &child_bp, |
a53efbd5 | 176 | XFS_ATTR_FORK); |
fde2227c | 177 | if (error) |
d99831ff | 178 | return error; |
fde2227c | 179 | |
a53efbd5 | 180 | /* save for re-read later */ |
04fcad80 | 181 | child_blkno = xfs_buf_daddr(child_bp); |
fde2227c | 182 | |
a53efbd5 BF |
183 | /* |
184 | * Invalidate the subtree, however we have to. | |
185 | */ | |
186 | info = child_bp->b_addr; | |
187 | switch (info->magic) { | |
188 | case cpu_to_be16(XFS_DA_NODE_MAGIC): | |
189 | case cpu_to_be16(XFS_DA3_NODE_MAGIC): | |
190 | error = xfs_attr3_node_inactive(trans, dp, child_bp, | |
191 | level + 1); | |
192 | break; | |
193 | case cpu_to_be16(XFS_ATTR_LEAF_MAGIC): | |
194 | case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC): | |
195 | error = xfs_attr3_leaf_inactive(trans, dp, child_bp); | |
196 | break; | |
197 | default: | |
8d57c216 | 198 | xfs_buf_mark_corrupt(child_bp); |
a53efbd5 | 199 | xfs_trans_brelse(*trans, child_bp); |
a5155b87 | 200 | error = -EFSCORRUPTED; |
a53efbd5 | 201 | break; |
fde2227c | 202 | } |
a53efbd5 BF |
203 | if (error) |
204 | return error; | |
205 | ||
206 | /* | |
207 | * Remove the subsidiary block from the cache and from the log. | |
208 | */ | |
ce92464c | 209 | error = xfs_trans_get_buf(*trans, mp->m_ddev_targp, |
2911edb6 | 210 | child_blkno, |
ce92464c DW |
211 | XFS_FSB_TO_BB(mp, mp->m_attr_geo->fsbcount), 0, |
212 | &child_bp); | |
213 | if (error) | |
214 | return error; | |
a53efbd5 | 215 | xfs_trans_binval(*trans, child_bp); |
95ff0363 | 216 | child_bp = NULL; |
fde2227c DC |
217 | |
218 | /* | |
219 | * If we're not done, re-read the parent to get the next | |
220 | * child block number. | |
221 | */ | |
222 | if (i + 1 < ichdr.count) { | |
51908ca7 CH |
223 | struct xfs_da3_icnode_hdr phdr; |
224 | ||
02c57f0a CH |
225 | error = xfs_da3_node_read_mapped(*trans, dp, |
226 | parent_blkno, &bp, XFS_ATTR_FORK); | |
fde2227c DC |
227 | if (error) |
228 | return error; | |
51908ca7 CH |
229 | xfs_da3_node_hdr_from_disk(dp->i_mount, &phdr, |
230 | bp->b_addr); | |
231 | child_fsb = be32_to_cpu(phdr.btree[i + 1].before); | |
fde2227c | 232 | xfs_trans_brelse(*trans, bp); |
95ff0363 | 233 | bp = NULL; |
fde2227c DC |
234 | } |
235 | /* | |
236 | * Atomically commit the whole invalidate stuff. | |
237 | */ | |
411350df | 238 | error = xfs_trans_roll_inode(trans, dp); |
fde2227c DC |
239 | if (error) |
240 | return error; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | /* | |
247 | * Indiscriminately delete the entire attribute fork | |
248 | * | |
249 | * Recurse (gasp!) through the attribute nodes until we find leaves. | |
250 | * We're doing a depth-first traversal in order to invalidate everything. | |
251 | */ | |
0d5a75e9 | 252 | static int |
fde2227c DC |
253 | xfs_attr3_root_inactive( |
254 | struct xfs_trans **trans, | |
255 | struct xfs_inode *dp) | |
256 | { | |
2911edb6 | 257 | struct xfs_mount *mp = dp->i_mount; |
fde2227c DC |
258 | struct xfs_da_blkinfo *info; |
259 | struct xfs_buf *bp; | |
260 | xfs_daddr_t blkno; | |
261 | int error; | |
262 | ||
263 | /* | |
264 | * Read block 0 to see what we have to work with. | |
265 | * We only get here if we have extents, since we remove | |
266 | * the extents in reverse order the extent containing | |
267 | * block 0 must still be there. | |
268 | */ | |
02c57f0a | 269 | error = xfs_da3_node_read(*trans, dp, 0, &bp, XFS_ATTR_FORK); |
fde2227c DC |
270 | if (error) |
271 | return error; | |
9343ee76 | 272 | blkno = xfs_buf_daddr(bp); |
fde2227c DC |
273 | |
274 | /* | |
275 | * Invalidate the tree, even if the "tree" is only a single leaf block. | |
276 | * This is a depth-first traversal! | |
277 | */ | |
278 | info = bp->b_addr; | |
279 | switch (info->magic) { | |
280 | case cpu_to_be16(XFS_DA_NODE_MAGIC): | |
281 | case cpu_to_be16(XFS_DA3_NODE_MAGIC): | |
282 | error = xfs_attr3_node_inactive(trans, dp, bp, 1); | |
283 | break; | |
284 | case cpu_to_be16(XFS_ATTR_LEAF_MAGIC): | |
285 | case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC): | |
286 | error = xfs_attr3_leaf_inactive(trans, dp, bp); | |
287 | break; | |
288 | default: | |
c2414ad6 | 289 | error = -EFSCORRUPTED; |
8d57c216 | 290 | xfs_buf_mark_corrupt(bp); |
fde2227c DC |
291 | xfs_trans_brelse(*trans, bp); |
292 | break; | |
293 | } | |
294 | if (error) | |
295 | return error; | |
296 | ||
297 | /* | |
298 | * Invalidate the incore copy of the root block. | |
299 | */ | |
ce92464c DW |
300 | error = xfs_trans_get_buf(*trans, mp->m_ddev_targp, blkno, |
301 | XFS_FSB_TO_BB(mp, mp->m_attr_geo->fsbcount), 0, &bp); | |
302 | if (error) | |
303 | return error; | |
2911edb6 CH |
304 | error = bp->b_error; |
305 | if (error) { | |
306 | xfs_trans_brelse(*trans, bp); | |
fde2227c | 307 | return error; |
2911edb6 | 308 | } |
fde2227c DC |
309 | xfs_trans_binval(*trans, bp); /* remove from cache */ |
310 | /* | |
311 | * Commit the invalidate and start the next transaction. | |
312 | */ | |
411350df | 313 | error = xfs_trans_roll_inode(trans, dp); |
fde2227c DC |
314 | |
315 | return error; | |
316 | } | |
317 | ||
6dfe5a04 DC |
318 | /* |
319 | * xfs_attr_inactive kills all traces of an attribute fork on an inode. It | |
320 | * removes both the on-disk and in-memory inode fork. Note that this also has to | |
321 | * handle the condition of inodes without attributes but with an attribute fork | |
322 | * configured, so we can't use xfs_inode_hasattr() here. | |
323 | * | |
324 | * The in-memory attribute fork is removed even on error. | |
325 | */ | |
fde2227c | 326 | int |
6dfe5a04 DC |
327 | xfs_attr_inactive( |
328 | struct xfs_inode *dp) | |
fde2227c | 329 | { |
6dfe5a04 DC |
330 | struct xfs_trans *trans; |
331 | struct xfs_mount *mp; | |
6dfe5a04 DC |
332 | int lock_mode = XFS_ILOCK_SHARED; |
333 | int error = 0; | |
fde2227c DC |
334 | |
335 | mp = dp->i_mount; | |
336 | ASSERT(! XFS_NOT_DQATTACHED(mp, dp)); | |
337 | ||
6dfe5a04 | 338 | xfs_ilock(dp, lock_mode); |
932b42c6 | 339 | if (!xfs_inode_has_attr_fork(dp)) |
6dfe5a04 DC |
340 | goto out_destroy_fork; |
341 | xfs_iunlock(dp, lock_mode); | |
fde2227c | 342 | |
6dfe5a04 | 343 | lock_mode = 0; |
253f4911 CH |
344 | |
345 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_attrinval, 0, 0, 0, &trans); | |
6dfe5a04 | 346 | if (error) |
253f4911 | 347 | goto out_destroy_fork; |
6dfe5a04 DC |
348 | |
349 | lock_mode = XFS_ILOCK_EXCL; | |
6dfe5a04 DC |
350 | xfs_ilock(dp, lock_mode); |
351 | ||
932b42c6 | 352 | if (!xfs_inode_has_attr_fork(dp)) |
6dfe5a04 | 353 | goto out_cancel; |
fde2227c DC |
354 | |
355 | /* | |
356 | * No need to make quota reservations here. We expect to release some | |
357 | * blocks, not allocate, in the common case. | |
358 | */ | |
359 | xfs_trans_ijoin(trans, dp, 0); | |
360 | ||
f66bf042 BF |
361 | /* |
362 | * Invalidate and truncate the attribute fork extents. Make sure the | |
e45d7cb2 | 363 | * fork actually has xattr blocks as otherwise the invalidation has no |
f66bf042 BF |
364 | * blocks to read and returns an error. In this case, just do the fork |
365 | * removal below. | |
366 | */ | |
e45d7cb2 | 367 | if (dp->i_af.if_nextents > 0) { |
6dfe5a04 DC |
368 | error = xfs_attr3_root_inactive(&trans, dp); |
369 | if (error) | |
370 | goto out_cancel; | |
371 | ||
372 | error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0); | |
373 | if (error) | |
374 | goto out_cancel; | |
fde2227c | 375 | } |
fde2227c | 376 | |
6dfe5a04 DC |
377 | /* Reset the attribute fork - this also destroys the in-core fork */ |
378 | xfs_attr_fork_remove(dp, trans); | |
fde2227c | 379 | |
70393313 | 380 | error = xfs_trans_commit(trans); |
6dfe5a04 | 381 | xfs_iunlock(dp, lock_mode); |
d99831ff | 382 | return error; |
fde2227c | 383 | |
6dfe5a04 | 384 | out_cancel: |
4906e215 | 385 | xfs_trans_cancel(trans); |
6dfe5a04 DC |
386 | out_destroy_fork: |
387 | /* kill the in-core attr fork before we drop the inode lock */ | |
e45d7cb2 | 388 | xfs_ifork_zap_attr(dp); |
6dfe5a04 DC |
389 | if (lock_mode) |
390 | xfs_iunlock(dp, lock_mode); | |
d99831ff | 391 | return error; |
fde2227c | 392 | } |