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Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
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 | */ |
16f7e0fe | 18 | |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 | 28 | #include "xfs_mount.h" |
a844f451 | 29 | #include "xfs_da_btree.h" |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_attr_sf.h" |
1da177e4 | 32 | #include "xfs_dinode.h" |
1da177e4 | 33 | #include "xfs_inode.h" |
a844f451 | 34 | #include "xfs_alloc.h" |
a844f451 | 35 | #include "xfs_inode_item.h" |
1da177e4 | 36 | #include "xfs_bmap.h" |
1da177e4 LT |
37 | #include "xfs_attr.h" |
38 | #include "xfs_attr_leaf.h" | |
39 | #include "xfs_error.h" | |
1da177e4 | 40 | #include "xfs_quota.h" |
1da177e4 | 41 | #include "xfs_trans_space.h" |
a844f451 | 42 | #include "xfs_rw.h" |
739bfb2a | 43 | #include "xfs_vnodeops.h" |
0b1b213f | 44 | #include "xfs_trace.h" |
1da177e4 LT |
45 | |
46 | /* | |
47 | * xfs_attr.c | |
48 | * | |
49 | * Provide the external interfaces to manage attribute lists. | |
50 | */ | |
51 | ||
52 | /*======================================================================== | |
53 | * Function prototypes for the kernel. | |
54 | *========================================================================*/ | |
55 | ||
56 | /* | |
57 | * Internal routines when attribute list fits inside the inode. | |
58 | */ | |
59 | STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args); | |
60 | ||
61 | /* | |
62 | * Internal routines when attribute list is one block. | |
63 | */ | |
ba0f32d4 | 64 | STATIC int xfs_attr_leaf_get(xfs_da_args_t *args); |
1da177e4 LT |
65 | STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args); |
66 | STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args); | |
67 | STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context); | |
68 | ||
69 | /* | |
70 | * Internal routines when attribute list is more than one block. | |
71 | */ | |
ba0f32d4 | 72 | STATIC int xfs_attr_node_get(xfs_da_args_t *args); |
1da177e4 LT |
73 | STATIC int xfs_attr_node_addname(xfs_da_args_t *args); |
74 | STATIC int xfs_attr_node_removename(xfs_da_args_t *args); | |
75 | STATIC int xfs_attr_node_list(xfs_attr_list_context_t *context); | |
76 | STATIC int xfs_attr_fillstate(xfs_da_state_t *state); | |
77 | STATIC int xfs_attr_refillstate(xfs_da_state_t *state); | |
78 | ||
79 | /* | |
80 | * Routines to manipulate out-of-line attribute values. | |
81 | */ | |
1da177e4 LT |
82 | STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args); |
83 | STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args); | |
84 | ||
85 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ | |
86 | ||
e8b0ebaa BN |
87 | STATIC int |
88 | xfs_attr_name_to_xname( | |
89 | struct xfs_name *xname, | |
a9273ca5 | 90 | const unsigned char *aname) |
e8b0ebaa BN |
91 | { |
92 | if (!aname) | |
93 | return EINVAL; | |
94 | xname->name = aname; | |
a9273ca5 | 95 | xname->len = strlen((char *)aname); |
e8b0ebaa BN |
96 | if (xname->len >= MAXNAMELEN) |
97 | return EFAULT; /* match IRIX behaviour */ | |
98 | ||
99 | return 0; | |
100 | } | |
1da177e4 | 101 | |
caf8aabd CH |
102 | STATIC int |
103 | xfs_inode_hasattr( | |
104 | struct xfs_inode *ip) | |
105 | { | |
106 | if (!XFS_IFORK_Q(ip) || | |
107 | (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && | |
108 | ip->i_d.di_anextents == 0)) | |
109 | return 0; | |
110 | return 1; | |
111 | } | |
112 | ||
1da177e4 LT |
113 | /*======================================================================== |
114 | * Overall external interface routines. | |
115 | *========================================================================*/ | |
116 | ||
e82fa0c7 CH |
117 | STATIC int |
118 | xfs_attr_get_int( | |
119 | struct xfs_inode *ip, | |
120 | struct xfs_name *name, | |
a9273ca5 | 121 | unsigned char *value, |
e82fa0c7 CH |
122 | int *valuelenp, |
123 | int flags) | |
1da177e4 LT |
124 | { |
125 | xfs_da_args_t args; | |
126 | int error; | |
127 | ||
caf8aabd CH |
128 | if (!xfs_inode_hasattr(ip)) |
129 | return ENOATTR; | |
1da177e4 | 130 | |
1da177e4 LT |
131 | /* |
132 | * Fill in the arg structure for this request. | |
133 | */ | |
134 | memset((char *)&args, 0, sizeof(args)); | |
e8b0ebaa BN |
135 | args.name = name->name; |
136 | args.namelen = name->len; | |
1da177e4 LT |
137 | args.value = value; |
138 | args.valuelen = *valuelenp; | |
139 | args.flags = flags; | |
140 | args.hashval = xfs_da_hashname(args.name, args.namelen); | |
141 | args.dp = ip; | |
142 | args.whichfork = XFS_ATTR_FORK; | |
143 | ||
144 | /* | |
145 | * Decide on what work routines to call based on the inode size. | |
146 | */ | |
caf8aabd | 147 | if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
1da177e4 LT |
148 | error = xfs_attr_shortform_getvalue(&args); |
149 | } else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) { | |
150 | error = xfs_attr_leaf_get(&args); | |
151 | } else { | |
152 | error = xfs_attr_node_get(&args); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Return the number of bytes in the value to the caller. | |
157 | */ | |
158 | *valuelenp = args.valuelen; | |
159 | ||
160 | if (error == EEXIST) | |
161 | error = 0; | |
162 | return(error); | |
163 | } | |
164 | ||
165 | int | |
993386c1 CH |
166 | xfs_attr_get( |
167 | xfs_inode_t *ip, | |
a9273ca5 DC |
168 | const unsigned char *name, |
169 | unsigned char *value, | |
993386c1 | 170 | int *valuelenp, |
e8b0ebaa | 171 | int flags) |
1da177e4 | 172 | { |
e8b0ebaa BN |
173 | int error; |
174 | struct xfs_name xname; | |
1da177e4 LT |
175 | |
176 | XFS_STATS_INC(xs_attr_get); | |
177 | ||
1da177e4 LT |
178 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
179 | return(EIO); | |
180 | ||
e8b0ebaa BN |
181 | error = xfs_attr_name_to_xname(&xname, name); |
182 | if (error) | |
183 | return error; | |
184 | ||
1da177e4 | 185 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
e82fa0c7 | 186 | error = xfs_attr_get_int(ip, &xname, value, valuelenp, flags); |
1da177e4 LT |
187 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
188 | return(error); | |
189 | } | |
190 | ||
5e9da7b7 NS |
191 | /* |
192 | * Calculate how many blocks we need for the new attribute, | |
193 | */ | |
5d77c0dc | 194 | STATIC int |
5e9da7b7 NS |
195 | xfs_attr_calc_size( |
196 | struct xfs_inode *ip, | |
197 | int namelen, | |
198 | int valuelen, | |
199 | int *local) | |
200 | { | |
201 | struct xfs_mount *mp = ip->i_mount; | |
202 | int size; | |
203 | int nblks; | |
204 | ||
205 | /* | |
206 | * Determine space new attribute will use, and if it would be | |
207 | * "local" or "remote" (note: local != inline). | |
208 | */ | |
209 | size = xfs_attr_leaf_newentsize(namelen, valuelen, | |
210 | mp->m_sb.sb_blocksize, local); | |
211 | ||
212 | nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK); | |
213 | if (*local) { | |
214 | if (size > (mp->m_sb.sb_blocksize >> 1)) { | |
215 | /* Double split possible */ | |
216 | nblks *= 2; | |
217 | } | |
218 | } else { | |
219 | /* | |
220 | * Out of line attribute, cannot double split, but | |
221 | * make room for the attribute value itself. | |
222 | */ | |
223 | uint dblocks = XFS_B_TO_FSB(mp, valuelen); | |
224 | nblks += dblocks; | |
225 | nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK); | |
226 | } | |
227 | ||
228 | return nblks; | |
229 | } | |
230 | ||
e8b0ebaa | 231 | STATIC int |
a9273ca5 DC |
232 | xfs_attr_set_int( |
233 | struct xfs_inode *dp, | |
234 | struct xfs_name *name, | |
235 | unsigned char *value, | |
236 | int valuelen, | |
237 | int flags) | |
1da177e4 LT |
238 | { |
239 | xfs_da_args_t args; | |
1da177e4 LT |
240 | xfs_fsblock_t firstblock; |
241 | xfs_bmap_free_t flist; | |
242 | int error, err2, committed; | |
aa82daa0 | 243 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 244 | int rsvd = (flags & ATTR_ROOT) != 0; |
5e9da7b7 | 245 | int local; |
1da177e4 LT |
246 | |
247 | /* | |
248 | * Attach the dquots to the inode. | |
249 | */ | |
7d095257 CH |
250 | error = xfs_qm_dqattach(dp, 0); |
251 | if (error) | |
252 | return error; | |
1da177e4 LT |
253 | |
254 | /* | |
255 | * If the inode doesn't have an attribute fork, add one. | |
256 | * (inode must not be locked when we call this routine) | |
257 | */ | |
258 | if (XFS_IFORK_Q(dp) == 0) { | |
e5889e90 | 259 | int sf_size = sizeof(xfs_attr_sf_hdr_t) + |
e8b0ebaa | 260 | XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen); |
e5889e90 BN |
261 | |
262 | if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd))) | |
1da177e4 LT |
263 | return(error); |
264 | } | |
265 | ||
266 | /* | |
267 | * Fill in the arg structure for this request. | |
268 | */ | |
269 | memset((char *)&args, 0, sizeof(args)); | |
e8b0ebaa BN |
270 | args.name = name->name; |
271 | args.namelen = name->len; | |
1da177e4 LT |
272 | args.value = value; |
273 | args.valuelen = valuelen; | |
274 | args.flags = flags; | |
275 | args.hashval = xfs_da_hashname(args.name, args.namelen); | |
276 | args.dp = dp; | |
277 | args.firstblock = &firstblock; | |
278 | args.flist = &flist; | |
279 | args.whichfork = XFS_ATTR_FORK; | |
6a178100 | 280 | args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
1da177e4 | 281 | |
1da177e4 | 282 | /* Size is now blocks for attribute data */ |
5e9da7b7 | 283 | args.total = xfs_attr_calc_size(dp, name->len, valuelen, &local); |
1da177e4 LT |
284 | |
285 | /* | |
286 | * Start our first transaction of the day. | |
287 | * | |
288 | * All future transactions during this code must be "chained" off | |
289 | * this one via the trans_dup() call. All transactions will contain | |
290 | * the inode, and the inode will always be marked with trans_ihold(). | |
291 | * Since the inode will be locked in all transactions, we must log | |
292 | * the inode in every transaction to let it float upward through | |
293 | * the log. | |
294 | */ | |
295 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_SET); | |
296 | ||
297 | /* | |
298 | * Root fork attributes can use reserved data blocks for this | |
299 | * operation if necessary | |
300 | */ | |
301 | ||
302 | if (rsvd) | |
303 | args.trans->t_flags |= XFS_TRANS_RESERVE; | |
304 | ||
5e9da7b7 NS |
305 | if ((error = xfs_trans_reserve(args.trans, args.total, |
306 | XFS_ATTRSET_LOG_RES(mp, args.total), 0, | |
307 | XFS_TRANS_PERM_LOG_RES, XFS_ATTRSET_LOG_COUNT))) { | |
1da177e4 LT |
308 | xfs_trans_cancel(args.trans, 0); |
309 | return(error); | |
310 | } | |
311 | xfs_ilock(dp, XFS_ILOCK_EXCL); | |
312 | ||
7d095257 | 313 | error = xfs_trans_reserve_quota_nblks(args.trans, dp, args.total, 0, |
5e9da7b7 NS |
314 | rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : |
315 | XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
316 | if (error) { |
317 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
318 | xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES); | |
319 | return (error); | |
320 | } | |
321 | ||
322 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); | |
323 | xfs_trans_ihold(args.trans, dp); | |
324 | ||
325 | /* | |
c41564b5 | 326 | * If the attribute list is non-existent or a shortform list, |
1da177e4 LT |
327 | * upgrade it to a single-leaf-block attribute list. |
328 | */ | |
329 | if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) || | |
330 | ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) && | |
331 | (dp->i_d.di_anextents == 0))) { | |
332 | ||
333 | /* | |
334 | * Build initial attribute list (if required). | |
335 | */ | |
336 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) | |
d8cc890d | 337 | xfs_attr_shortform_create(&args); |
1da177e4 LT |
338 | |
339 | /* | |
340 | * Try to add the attr to the attribute list in | |
341 | * the inode. | |
342 | */ | |
343 | error = xfs_attr_shortform_addname(&args); | |
344 | if (error != ENOSPC) { | |
345 | /* | |
346 | * Commit the shortform mods, and we're done. | |
347 | * NOTE: this is also the error path (EEXIST, etc). | |
348 | */ | |
349 | ASSERT(args.trans != NULL); | |
350 | ||
351 | /* | |
352 | * If this is a synchronous mount, make sure that | |
353 | * the transaction goes to disk before returning | |
354 | * to the user. | |
355 | */ | |
356 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
357 | xfs_trans_set_sync(args.trans); | |
358 | } | |
359 | err2 = xfs_trans_commit(args.trans, | |
1c72bf90 | 360 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
361 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
362 | ||
363 | /* | |
364 | * Hit the inode change time. | |
365 | */ | |
366 | if (!error && (flags & ATTR_KERNOTIME) == 0) { | |
367 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); | |
368 | } | |
369 | return(error == 0 ? err2 : error); | |
370 | } | |
371 | ||
372 | /* | |
373 | * It won't fit in the shortform, transform to a leaf block. | |
374 | * GROT: another possible req'mt for a double-split btree op. | |
375 | */ | |
9d87c319 | 376 | xfs_bmap_init(args.flist, args.firstblock); |
1da177e4 LT |
377 | error = xfs_attr_shortform_to_leaf(&args); |
378 | if (!error) { | |
379 | error = xfs_bmap_finish(&args.trans, args.flist, | |
f7c99b6f | 380 | &committed); |
1da177e4 LT |
381 | } |
382 | if (error) { | |
383 | ASSERT(committed); | |
384 | args.trans = NULL; | |
385 | xfs_bmap_cancel(&flist); | |
386 | goto out; | |
387 | } | |
388 | ||
389 | /* | |
390 | * bmap_finish() may have committed the last trans and started | |
391 | * a new one. We need the inode to be in all transactions. | |
392 | */ | |
393 | if (committed) { | |
394 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); | |
395 | xfs_trans_ihold(args.trans, dp); | |
396 | } | |
397 | ||
398 | /* | |
399 | * Commit the leaf transformation. We'll need another (linked) | |
400 | * transaction to add the new attribute to the leaf. | |
401 | */ | |
322ff6b8 NS |
402 | |
403 | error = xfs_trans_roll(&args.trans, dp); | |
404 | if (error) | |
1da177e4 LT |
405 | goto out; |
406 | ||
407 | } | |
408 | ||
409 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { | |
410 | error = xfs_attr_leaf_addname(&args); | |
411 | } else { | |
412 | error = xfs_attr_node_addname(&args); | |
413 | } | |
414 | if (error) { | |
415 | goto out; | |
416 | } | |
417 | ||
418 | /* | |
419 | * If this is a synchronous mount, make sure that the | |
420 | * transaction goes to disk before returning to the user. | |
421 | */ | |
422 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
423 | xfs_trans_set_sync(args.trans); | |
424 | } | |
425 | ||
426 | /* | |
427 | * Commit the last in the sequence of transactions. | |
428 | */ | |
429 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); | |
1c72bf90 | 430 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
431 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
432 | ||
433 | /* | |
434 | * Hit the inode change time. | |
435 | */ | |
436 | if (!error && (flags & ATTR_KERNOTIME) == 0) { | |
437 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); | |
438 | } | |
439 | ||
440 | return(error); | |
441 | ||
442 | out: | |
443 | if (args.trans) | |
444 | xfs_trans_cancel(args.trans, | |
445 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
446 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
447 | return(error); | |
448 | } | |
449 | ||
aa82daa0 | 450 | int |
993386c1 CH |
451 | xfs_attr_set( |
452 | xfs_inode_t *dp, | |
a9273ca5 DC |
453 | const unsigned char *name, |
454 | unsigned char *value, | |
993386c1 CH |
455 | int valuelen, |
456 | int flags) | |
1da177e4 | 457 | { |
e8b0ebaa BN |
458 | int error; |
459 | struct xfs_name xname; | |
1da177e4 | 460 | |
aa82daa0 | 461 | XFS_STATS_INC(xs_attr_set); |
1da177e4 | 462 | |
aa82daa0 | 463 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
1da177e4 LT |
464 | return (EIO); |
465 | ||
e8b0ebaa BN |
466 | error = xfs_attr_name_to_xname(&xname, name); |
467 | if (error) | |
468 | return error; | |
469 | ||
470 | return xfs_attr_set_int(dp, &xname, value, valuelen, flags); | |
aa82daa0 NS |
471 | } |
472 | ||
473 | /* | |
474 | * Generic handler routine to remove a name from an attribute list. | |
475 | * Transitions attribute list from Btree to shortform as necessary. | |
476 | */ | |
e8b0ebaa BN |
477 | STATIC int |
478 | xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags) | |
aa82daa0 NS |
479 | { |
480 | xfs_da_args_t args; | |
481 | xfs_fsblock_t firstblock; | |
482 | xfs_bmap_free_t flist; | |
483 | int error; | |
484 | xfs_mount_t *mp = dp->i_mount; | |
485 | ||
1da177e4 LT |
486 | /* |
487 | * Fill in the arg structure for this request. | |
488 | */ | |
489 | memset((char *)&args, 0, sizeof(args)); | |
e8b0ebaa BN |
490 | args.name = name->name; |
491 | args.namelen = name->len; | |
1da177e4 LT |
492 | args.flags = flags; |
493 | args.hashval = xfs_da_hashname(args.name, args.namelen); | |
494 | args.dp = dp; | |
495 | args.firstblock = &firstblock; | |
496 | args.flist = &flist; | |
497 | args.total = 0; | |
498 | args.whichfork = XFS_ATTR_FORK; | |
499 | ||
500 | /* | |
501 | * Attach the dquots to the inode. | |
502 | */ | |
7d095257 CH |
503 | error = xfs_qm_dqattach(dp, 0); |
504 | if (error) | |
505 | return error; | |
1da177e4 LT |
506 | |
507 | /* | |
508 | * Start our first transaction of the day. | |
509 | * | |
510 | * All future transactions during this code must be "chained" off | |
511 | * this one via the trans_dup() call. All transactions will contain | |
512 | * the inode, and the inode will always be marked with trans_ihold(). | |
513 | * Since the inode will be locked in all transactions, we must log | |
514 | * the inode in every transaction to let it float upward through | |
515 | * the log. | |
516 | */ | |
517 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM); | |
518 | ||
519 | /* | |
520 | * Root fork attributes can use reserved data blocks for this | |
521 | * operation if necessary | |
522 | */ | |
523 | ||
524 | if (flags & ATTR_ROOT) | |
525 | args.trans->t_flags |= XFS_TRANS_RESERVE; | |
526 | ||
527 | if ((error = xfs_trans_reserve(args.trans, | |
528 | XFS_ATTRRM_SPACE_RES(mp), | |
529 | XFS_ATTRRM_LOG_RES(mp), | |
530 | 0, XFS_TRANS_PERM_LOG_RES, | |
531 | XFS_ATTRRM_LOG_COUNT))) { | |
532 | xfs_trans_cancel(args.trans, 0); | |
533 | return(error); | |
1da177e4 LT |
534 | } |
535 | ||
536 | xfs_ilock(dp, XFS_ILOCK_EXCL); | |
537 | /* | |
538 | * No need to make quota reservations here. We expect to release some | |
539 | * blocks not allocate in the common case. | |
540 | */ | |
541 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); | |
542 | xfs_trans_ihold(args.trans, dp); | |
543 | ||
544 | /* | |
545 | * Decide on what work routines to call based on the inode size. | |
546 | */ | |
caf8aabd | 547 | if (!xfs_inode_hasattr(dp)) { |
1da177e4 LT |
548 | error = XFS_ERROR(ENOATTR); |
549 | goto out; | |
550 | } | |
551 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { | |
552 | ASSERT(dp->i_afp->if_flags & XFS_IFINLINE); | |
553 | error = xfs_attr_shortform_remove(&args); | |
554 | if (error) { | |
555 | goto out; | |
556 | } | |
557 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { | |
558 | error = xfs_attr_leaf_removename(&args); | |
559 | } else { | |
560 | error = xfs_attr_node_removename(&args); | |
561 | } | |
562 | if (error) { | |
563 | goto out; | |
564 | } | |
565 | ||
566 | /* | |
567 | * If this is a synchronous mount, make sure that the | |
568 | * transaction goes to disk before returning to the user. | |
569 | */ | |
570 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
571 | xfs_trans_set_sync(args.trans); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Commit the last in the sequence of transactions. | |
576 | */ | |
577 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); | |
1c72bf90 | 578 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
579 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
580 | ||
581 | /* | |
582 | * Hit the inode change time. | |
583 | */ | |
584 | if (!error && (flags & ATTR_KERNOTIME) == 0) { | |
585 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); | |
586 | } | |
587 | ||
588 | return(error); | |
589 | ||
590 | out: | |
591 | if (args.trans) | |
592 | xfs_trans_cancel(args.trans, | |
593 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
594 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
595 | return(error); | |
596 | } | |
597 | ||
aa82daa0 | 598 | int |
993386c1 CH |
599 | xfs_attr_remove( |
600 | xfs_inode_t *dp, | |
a9273ca5 | 601 | const unsigned char *name, |
993386c1 | 602 | int flags) |
aa82daa0 | 603 | { |
e8b0ebaa BN |
604 | int error; |
605 | struct xfs_name xname; | |
aa82daa0 NS |
606 | |
607 | XFS_STATS_INC(xs_attr_remove); | |
608 | ||
aa82daa0 NS |
609 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
610 | return (EIO); | |
611 | ||
e8b0ebaa BN |
612 | error = xfs_attr_name_to_xname(&xname, name); |
613 | if (error) | |
614 | return error; | |
615 | ||
aa82daa0 | 616 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
caf8aabd | 617 | if (!xfs_inode_hasattr(dp)) { |
aa82daa0 | 618 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
caf8aabd | 619 | return XFS_ERROR(ENOATTR); |
aa82daa0 NS |
620 | } |
621 | xfs_iunlock(dp, XFS_ILOCK_SHARED); | |
622 | ||
e8b0ebaa | 623 | return xfs_attr_remove_int(dp, &xname, flags); |
aa82daa0 NS |
624 | } |
625 | ||
ad9b463a | 626 | int |
726801ba TS |
627 | xfs_attr_list_int(xfs_attr_list_context_t *context) |
628 | { | |
629 | int error; | |
630 | xfs_inode_t *dp = context->dp; | |
631 | ||
ad9b463a CH |
632 | XFS_STATS_INC(xs_attr_list); |
633 | ||
634 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
635 | return EIO; | |
636 | ||
637 | xfs_ilock(dp, XFS_ILOCK_SHARED); | |
ad9b463a | 638 | |
726801ba TS |
639 | /* |
640 | * Decide on what work routines to call based on the inode size. | |
641 | */ | |
caf8aabd | 642 | if (!xfs_inode_hasattr(dp)) { |
726801ba TS |
643 | error = 0; |
644 | } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { | |
645 | error = xfs_attr_shortform_list(context); | |
646 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { | |
647 | error = xfs_attr_leaf_list(context); | |
648 | } else { | |
649 | error = xfs_attr_node_list(context); | |
650 | } | |
ad9b463a CH |
651 | |
652 | xfs_iunlock(dp, XFS_ILOCK_SHARED); | |
ad9b463a | 653 | |
726801ba TS |
654 | return error; |
655 | } | |
656 | ||
657 | #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ | |
658 | (((struct attrlist_ent *) 0)->a_name - (char *) 0) | |
659 | #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ | |
660 | ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \ | |
661 | & ~(sizeof(u_int32_t)-1)) | |
662 | ||
663 | /* | |
664 | * Format an attribute and copy it out to the user's buffer. | |
665 | * Take care to check values and protect against them changing later, | |
666 | * we may be reading them directly out of a user buffer. | |
667 | */ | |
668 | /*ARGSUSED*/ | |
669 | STATIC int | |
a9273ca5 DC |
670 | xfs_attr_put_listent( |
671 | xfs_attr_list_context_t *context, | |
672 | int flags, | |
673 | unsigned char *name, | |
674 | int namelen, | |
675 | int valuelen, | |
676 | unsigned char *value) | |
726801ba | 677 | { |
ad9b463a | 678 | struct attrlist *alist = (struct attrlist *)context->alist; |
726801ba TS |
679 | attrlist_ent_t *aep; |
680 | int arraytop; | |
681 | ||
682 | ASSERT(!(context->flags & ATTR_KERNOVAL)); | |
683 | ASSERT(context->count >= 0); | |
684 | ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); | |
ad9b463a | 685 | ASSERT(context->firstu >= sizeof(*alist)); |
726801ba TS |
686 | ASSERT(context->firstu <= context->bufsize); |
687 | ||
ad9b463a CH |
688 | /* |
689 | * Only list entries in the right namespace. | |
690 | */ | |
691 | if (((context->flags & ATTR_SECURE) == 0) != | |
692 | ((flags & XFS_ATTR_SECURE) == 0)) | |
693 | return 0; | |
694 | if (((context->flags & ATTR_ROOT) == 0) != | |
695 | ((flags & XFS_ATTR_ROOT) == 0)) | |
696 | return 0; | |
697 | ||
698 | arraytop = sizeof(*alist) + | |
699 | context->count * sizeof(alist->al_offset[0]); | |
726801ba TS |
700 | context->firstu -= ATTR_ENTSIZE(namelen); |
701 | if (context->firstu < arraytop) { | |
0b1b213f | 702 | trace_xfs_attr_list_full(context); |
ad9b463a | 703 | alist->al_more = 1; |
726801ba TS |
704 | context->seen_enough = 1; |
705 | return 1; | |
706 | } | |
707 | ||
ad9b463a | 708 | aep = (attrlist_ent_t *)&context->alist[context->firstu]; |
726801ba TS |
709 | aep->a_valuelen = valuelen; |
710 | memcpy(aep->a_name, name, namelen); | |
ad9b463a CH |
711 | aep->a_name[namelen] = 0; |
712 | alist->al_offset[context->count++] = context->firstu; | |
713 | alist->al_count = context->count; | |
0b1b213f | 714 | trace_xfs_attr_list_add(context); |
726801ba TS |
715 | return 0; |
716 | } | |
717 | ||
1da177e4 LT |
718 | /* |
719 | * Generate a list of extended attribute names and optionally | |
720 | * also value lengths. Positive return value follows the XFS | |
721 | * convention of being an error, zero or negative return code | |
722 | * is the length of the buffer returned (negated), indicating | |
723 | * success. | |
724 | */ | |
725 | int | |
993386c1 CH |
726 | xfs_attr_list( |
727 | xfs_inode_t *dp, | |
728 | char *buffer, | |
729 | int bufsize, | |
730 | int flags, | |
731 | attrlist_cursor_kern_t *cursor) | |
1da177e4 LT |
732 | { |
733 | xfs_attr_list_context_t context; | |
ad9b463a | 734 | struct attrlist *alist; |
1da177e4 LT |
735 | int error; |
736 | ||
1da177e4 LT |
737 | /* |
738 | * Validate the cursor. | |
739 | */ | |
740 | if (cursor->pad1 || cursor->pad2) | |
741 | return(XFS_ERROR(EINVAL)); | |
742 | if ((cursor->initted == 0) && | |
743 | (cursor->hashval || cursor->blkno || cursor->offset)) | |
726801ba | 744 | return XFS_ERROR(EINVAL); |
1da177e4 LT |
745 | |
746 | /* | |
747 | * Check for a properly aligned buffer. | |
748 | */ | |
749 | if (((long)buffer) & (sizeof(int)-1)) | |
726801ba | 750 | return XFS_ERROR(EFAULT); |
1da177e4 LT |
751 | if (flags & ATTR_KERNOVAL) |
752 | bufsize = 0; | |
753 | ||
754 | /* | |
755 | * Initialize the output buffer. | |
756 | */ | |
ad9b463a | 757 | memset(&context, 0, sizeof(context)); |
993386c1 | 758 | context.dp = dp; |
1da177e4 | 759 | context.cursor = cursor; |
1da177e4 LT |
760 | context.resynch = 1; |
761 | context.flags = flags; | |
ad9b463a CH |
762 | context.alist = buffer; |
763 | context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ | |
764 | context.firstu = context.bufsize; | |
765 | context.put_listent = xfs_attr_put_listent; | |
1da177e4 | 766 | |
ad9b463a CH |
767 | alist = (struct attrlist *)context.alist; |
768 | alist->al_count = 0; | |
769 | alist->al_more = 0; | |
770 | alist->al_offset[0] = context.bufsize; | |
726801ba TS |
771 | |
772 | error = xfs_attr_list_int(&context); | |
ad9b463a | 773 | ASSERT(error >= 0); |
726801ba | 774 | return error; |
1da177e4 LT |
775 | } |
776 | ||
777 | int /* error */ | |
778 | xfs_attr_inactive(xfs_inode_t *dp) | |
779 | { | |
780 | xfs_trans_t *trans; | |
781 | xfs_mount_t *mp; | |
782 | int error; | |
783 | ||
784 | mp = dp->i_mount; | |
785 | ASSERT(! XFS_NOT_DQATTACHED(mp, dp)); | |
786 | ||
787 | xfs_ilock(dp, XFS_ILOCK_SHARED); | |
caf8aabd CH |
788 | if (!xfs_inode_hasattr(dp) || |
789 | dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { | |
1da177e4 | 790 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
caf8aabd | 791 | return 0; |
1da177e4 LT |
792 | } |
793 | xfs_iunlock(dp, XFS_ILOCK_SHARED); | |
794 | ||
795 | /* | |
796 | * Start our first transaction of the day. | |
797 | * | |
798 | * All future transactions during this code must be "chained" off | |
799 | * this one via the trans_dup() call. All transactions will contain | |
800 | * the inode, and the inode will always be marked with trans_ihold(). | |
801 | * Since the inode will be locked in all transactions, we must log | |
802 | * the inode in every transaction to let it float upward through | |
803 | * the log. | |
804 | */ | |
805 | trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL); | |
806 | if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0, | |
807 | XFS_TRANS_PERM_LOG_RES, | |
808 | XFS_ATTRINVAL_LOG_COUNT))) { | |
809 | xfs_trans_cancel(trans, 0); | |
810 | return(error); | |
811 | } | |
812 | xfs_ilock(dp, XFS_ILOCK_EXCL); | |
813 | ||
814 | /* | |
815 | * No need to make quota reservations here. We expect to release some | |
816 | * blocks, not allocate, in the common case. | |
817 | */ | |
818 | xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL); | |
819 | xfs_trans_ihold(trans, dp); | |
820 | ||
821 | /* | |
822 | * Decide on what work routines to call based on the inode size. | |
823 | */ | |
caf8aabd CH |
824 | if (!xfs_inode_hasattr(dp) || |
825 | dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { | |
1da177e4 LT |
826 | error = 0; |
827 | goto out; | |
828 | } | |
829 | error = xfs_attr_root_inactive(&trans, dp); | |
830 | if (error) | |
831 | goto out; | |
832 | /* | |
833 | * signal synchronous inactive transactions unless this | |
834 | * is a synchronous mount filesystem in which case we | |
835 | * know that we're here because we've been called out of | |
836 | * xfs_inactive which means that the last reference is gone | |
837 | * and the unlink transaction has already hit the disk so | |
838 | * async inactive transactions are safe. | |
839 | */ | |
840 | if ((error = xfs_itruncate_finish(&trans, dp, 0LL, XFS_ATTR_FORK, | |
841 | (!(mp->m_flags & XFS_MOUNT_WSYNC) | |
842 | ? 1 : 0)))) | |
843 | goto out; | |
844 | ||
845 | /* | |
846 | * Commit the last in the sequence of transactions. | |
847 | */ | |
848 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1c72bf90 | 849 | error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
850 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
851 | ||
852 | return(error); | |
853 | ||
854 | out: | |
855 | xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
856 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
857 | return(error); | |
858 | } | |
859 | ||
860 | ||
861 | ||
862 | /*======================================================================== | |
863 | * External routines when attribute list is inside the inode | |
864 | *========================================================================*/ | |
865 | ||
866 | /* | |
867 | * Add a name to the shortform attribute list structure | |
868 | * This is the external routine. | |
869 | */ | |
870 | STATIC int | |
871 | xfs_attr_shortform_addname(xfs_da_args_t *args) | |
872 | { | |
d8cc890d | 873 | int newsize, forkoff, retval; |
1da177e4 LT |
874 | |
875 | retval = xfs_attr_shortform_lookup(args); | |
876 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { | |
877 | return(retval); | |
878 | } else if (retval == EEXIST) { | |
879 | if (args->flags & ATTR_CREATE) | |
880 | return(retval); | |
881 | retval = xfs_attr_shortform_remove(args); | |
882 | ASSERT(retval == 0); | |
883 | } | |
884 | ||
d8cc890d NS |
885 | if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX || |
886 | args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX) | |
887 | return(XFS_ERROR(ENOSPC)); | |
888 | ||
1da177e4 LT |
889 | newsize = XFS_ATTR_SF_TOTSIZE(args->dp); |
890 | newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); | |
d8cc890d NS |
891 | |
892 | forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize); | |
893 | if (!forkoff) | |
1da177e4 | 894 | return(XFS_ERROR(ENOSPC)); |
d8cc890d NS |
895 | |
896 | xfs_attr_shortform_add(args, forkoff); | |
1da177e4 LT |
897 | return(0); |
898 | } | |
899 | ||
900 | ||
901 | /*======================================================================== | |
902 | * External routines when attribute list is one block | |
903 | *========================================================================*/ | |
904 | ||
905 | /* | |
906 | * Add a name to the leaf attribute list structure | |
907 | * | |
908 | * This leaf block cannot have a "remote" value, we only call this routine | |
909 | * if bmap_one_block() says there is only one block (ie: no remote blks). | |
910 | */ | |
a8272ce0 | 911 | STATIC int |
1da177e4 LT |
912 | xfs_attr_leaf_addname(xfs_da_args_t *args) |
913 | { | |
914 | xfs_inode_t *dp; | |
915 | xfs_dabuf_t *bp; | |
d8cc890d | 916 | int retval, error, committed, forkoff; |
1da177e4 LT |
917 | |
918 | /* | |
919 | * Read the (only) block in the attribute list in. | |
920 | */ | |
921 | dp = args->dp; | |
922 | args->blkno = 0; | |
923 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
924 | XFS_ATTR_FORK); | |
925 | if (error) | |
926 | return(error); | |
927 | ASSERT(bp != NULL); | |
928 | ||
929 | /* | |
930 | * Look up the given attribute in the leaf block. Figure out if | |
931 | * the given flags produce an error or call for an atomic rename. | |
932 | */ | |
933 | retval = xfs_attr_leaf_lookup_int(bp, args); | |
934 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { | |
935 | xfs_da_brelse(args->trans, bp); | |
936 | return(retval); | |
937 | } else if (retval == EEXIST) { | |
938 | if (args->flags & ATTR_CREATE) { /* pure create op */ | |
939 | xfs_da_brelse(args->trans, bp); | |
940 | return(retval); | |
941 | } | |
6a178100 | 942 | args->op_flags |= XFS_DA_OP_RENAME; /* an atomic rename */ |
1da177e4 LT |
943 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
944 | args->index2 = args->index; | |
945 | args->rmtblkno2 = args->rmtblkno; | |
946 | args->rmtblkcnt2 = args->rmtblkcnt; | |
947 | } | |
948 | ||
949 | /* | |
950 | * Add the attribute to the leaf block, transitioning to a Btree | |
951 | * if required. | |
952 | */ | |
953 | retval = xfs_attr_leaf_add(bp, args); | |
954 | xfs_da_buf_done(bp); | |
955 | if (retval == ENOSPC) { | |
956 | /* | |
957 | * Promote the attribute list to the Btree format, then | |
958 | * Commit that transaction so that the node_addname() call | |
959 | * can manage its own transactions. | |
960 | */ | |
9d87c319 | 961 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
962 | error = xfs_attr_leaf_to_node(args); |
963 | if (!error) { | |
964 | error = xfs_bmap_finish(&args->trans, args->flist, | |
f7c99b6f | 965 | &committed); |
1da177e4 LT |
966 | } |
967 | if (error) { | |
968 | ASSERT(committed); | |
969 | args->trans = NULL; | |
970 | xfs_bmap_cancel(args->flist); | |
971 | return(error); | |
972 | } | |
973 | ||
974 | /* | |
975 | * bmap_finish() may have committed the last trans and started | |
976 | * a new one. We need the inode to be in all transactions. | |
977 | */ | |
978 | if (committed) { | |
979 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
980 | xfs_trans_ihold(args->trans, dp); | |
981 | } | |
982 | ||
983 | /* | |
984 | * Commit the current trans (including the inode) and start | |
985 | * a new one. | |
986 | */ | |
322ff6b8 NS |
987 | error = xfs_trans_roll(&args->trans, dp); |
988 | if (error) | |
1da177e4 LT |
989 | return (error); |
990 | ||
991 | /* | |
992 | * Fob the whole rest of the problem off on the Btree code. | |
993 | */ | |
994 | error = xfs_attr_node_addname(args); | |
995 | return(error); | |
996 | } | |
997 | ||
998 | /* | |
999 | * Commit the transaction that added the attr name so that | |
1000 | * later routines can manage their own transactions. | |
1001 | */ | |
322ff6b8 NS |
1002 | error = xfs_trans_roll(&args->trans, dp); |
1003 | if (error) | |
1da177e4 LT |
1004 | return (error); |
1005 | ||
1006 | /* | |
1007 | * If there was an out-of-line value, allocate the blocks we | |
1008 | * identified for its storage and copy the value. This is done | |
1009 | * after we create the attribute so that we don't overflow the | |
1010 | * maximum size of a transaction and/or hit a deadlock. | |
1011 | */ | |
1012 | if (args->rmtblkno > 0) { | |
1013 | error = xfs_attr_rmtval_set(args); | |
1014 | if (error) | |
1015 | return(error); | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * If this is an atomic rename operation, we must "flip" the | |
1020 | * incomplete flags on the "new" and "old" attribute/value pairs | |
1021 | * so that one disappears and one appears atomically. Then we | |
1022 | * must remove the "old" attribute/value pair. | |
1023 | */ | |
6a178100 | 1024 | if (args->op_flags & XFS_DA_OP_RENAME) { |
1da177e4 LT |
1025 | /* |
1026 | * In a separate transaction, set the incomplete flag on the | |
1027 | * "old" attr and clear the incomplete flag on the "new" attr. | |
1028 | */ | |
1029 | error = xfs_attr_leaf_flipflags(args); | |
1030 | if (error) | |
1031 | return(error); | |
1032 | ||
1033 | /* | |
1034 | * Dismantle the "old" attribute/value pair by removing | |
1035 | * a "remote" value (if it exists). | |
1036 | */ | |
1037 | args->index = args->index2; | |
1038 | args->blkno = args->blkno2; | |
1039 | args->rmtblkno = args->rmtblkno2; | |
1040 | args->rmtblkcnt = args->rmtblkcnt2; | |
1041 | if (args->rmtblkno) { | |
1042 | error = xfs_attr_rmtval_remove(args); | |
1043 | if (error) | |
1044 | return(error); | |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | * Read in the block containing the "old" attr, then | |
1049 | * remove the "old" attr from that block (neat, huh!) | |
1050 | */ | |
1051 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, | |
1052 | &bp, XFS_ATTR_FORK); | |
1053 | if (error) | |
1054 | return(error); | |
1055 | ASSERT(bp != NULL); | |
1056 | (void)xfs_attr_leaf_remove(bp, args); | |
1057 | ||
1058 | /* | |
1059 | * If the result is small enough, shrink it all into the inode. | |
1060 | */ | |
d8cc890d | 1061 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
9d87c319 | 1062 | xfs_bmap_init(args->flist, args->firstblock); |
d8cc890d | 1063 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
1da177e4 LT |
1064 | /* bp is gone due to xfs_da_shrink_inode */ |
1065 | if (!error) { | |
1066 | error = xfs_bmap_finish(&args->trans, | |
1067 | args->flist, | |
1da177e4 LT |
1068 | &committed); |
1069 | } | |
1070 | if (error) { | |
1071 | ASSERT(committed); | |
1072 | args->trans = NULL; | |
1073 | xfs_bmap_cancel(args->flist); | |
1074 | return(error); | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * bmap_finish() may have committed the last trans | |
1079 | * and started a new one. We need the inode to be | |
1080 | * in all transactions. | |
1081 | */ | |
1082 | if (committed) { | |
1083 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1084 | xfs_trans_ihold(args->trans, dp); | |
1085 | } | |
1086 | } else | |
1087 | xfs_da_buf_done(bp); | |
1088 | ||
1089 | /* | |
1090 | * Commit the remove and start the next trans in series. | |
1091 | */ | |
322ff6b8 | 1092 | error = xfs_trans_roll(&args->trans, dp); |
1da177e4 LT |
1093 | |
1094 | } else if (args->rmtblkno > 0) { | |
1095 | /* | |
1096 | * Added a "remote" value, just clear the incomplete flag. | |
1097 | */ | |
1098 | error = xfs_attr_leaf_clearflag(args); | |
1099 | } | |
1100 | return(error); | |
1101 | } | |
1102 | ||
1103 | /* | |
1104 | * Remove a name from the leaf attribute list structure | |
1105 | * | |
1106 | * This leaf block cannot have a "remote" value, we only call this routine | |
1107 | * if bmap_one_block() says there is only one block (ie: no remote blks). | |
1108 | */ | |
1109 | STATIC int | |
1110 | xfs_attr_leaf_removename(xfs_da_args_t *args) | |
1111 | { | |
1112 | xfs_inode_t *dp; | |
1113 | xfs_dabuf_t *bp; | |
d8cc890d | 1114 | int error, committed, forkoff; |
1da177e4 LT |
1115 | |
1116 | /* | |
1117 | * Remove the attribute. | |
1118 | */ | |
1119 | dp = args->dp; | |
1120 | args->blkno = 0; | |
1121 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
1122 | XFS_ATTR_FORK); | |
1123 | if (error) { | |
1124 | return(error); | |
1125 | } | |
1126 | ||
1127 | ASSERT(bp != NULL); | |
1128 | error = xfs_attr_leaf_lookup_int(bp, args); | |
1129 | if (error == ENOATTR) { | |
1130 | xfs_da_brelse(args->trans, bp); | |
1131 | return(error); | |
1132 | } | |
1133 | ||
1134 | (void)xfs_attr_leaf_remove(bp, args); | |
1135 | ||
1136 | /* | |
1137 | * If the result is small enough, shrink it all into the inode. | |
1138 | */ | |
d8cc890d | 1139 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
9d87c319 | 1140 | xfs_bmap_init(args->flist, args->firstblock); |
d8cc890d | 1141 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
1da177e4 LT |
1142 | /* bp is gone due to xfs_da_shrink_inode */ |
1143 | if (!error) { | |
1144 | error = xfs_bmap_finish(&args->trans, args->flist, | |
f7c99b6f | 1145 | &committed); |
1da177e4 LT |
1146 | } |
1147 | if (error) { | |
1148 | ASSERT(committed); | |
1149 | args->trans = NULL; | |
1150 | xfs_bmap_cancel(args->flist); | |
1151 | return(error); | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * bmap_finish() may have committed the last trans and started | |
1156 | * a new one. We need the inode to be in all transactions. | |
1157 | */ | |
1158 | if (committed) { | |
1159 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1160 | xfs_trans_ihold(args->trans, dp); | |
1161 | } | |
1162 | } else | |
1163 | xfs_da_buf_done(bp); | |
1164 | return(0); | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Look up a name in a leaf attribute list structure. | |
1169 | * | |
1170 | * This leaf block cannot have a "remote" value, we only call this routine | |
1171 | * if bmap_one_block() says there is only one block (ie: no remote blks). | |
1172 | */ | |
ba0f32d4 | 1173 | STATIC int |
1da177e4 LT |
1174 | xfs_attr_leaf_get(xfs_da_args_t *args) |
1175 | { | |
1176 | xfs_dabuf_t *bp; | |
1177 | int error; | |
1178 | ||
1179 | args->blkno = 0; | |
1180 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
1181 | XFS_ATTR_FORK); | |
1182 | if (error) | |
1183 | return(error); | |
1184 | ASSERT(bp != NULL); | |
1185 | ||
1186 | error = xfs_attr_leaf_lookup_int(bp, args); | |
1187 | if (error != EEXIST) { | |
1188 | xfs_da_brelse(args->trans, bp); | |
1189 | return(error); | |
1190 | } | |
1191 | error = xfs_attr_leaf_getvalue(bp, args); | |
1192 | xfs_da_brelse(args->trans, bp); | |
1193 | if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) { | |
1194 | error = xfs_attr_rmtval_get(args); | |
1195 | } | |
1196 | return(error); | |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * Copy out attribute entries for attr_list(), for leaf attribute lists. | |
1201 | */ | |
1202 | STATIC int | |
1203 | xfs_attr_leaf_list(xfs_attr_list_context_t *context) | |
1204 | { | |
1205 | xfs_attr_leafblock_t *leaf; | |
1206 | int error; | |
1207 | xfs_dabuf_t *bp; | |
1208 | ||
1209 | context->cursor->blkno = 0; | |
1210 | error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK); | |
1211 | if (error) | |
726801ba | 1212 | return XFS_ERROR(error); |
1da177e4 LT |
1213 | ASSERT(bp != NULL); |
1214 | leaf = bp->data; | |
89da0544 | 1215 | if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_ATTR_LEAF_MAGIC)) { |
1da177e4 LT |
1216 | XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, |
1217 | context->dp->i_mount, leaf); | |
1218 | xfs_da_brelse(NULL, bp); | |
726801ba | 1219 | return XFS_ERROR(EFSCORRUPTED); |
1da177e4 LT |
1220 | } |
1221 | ||
726801ba | 1222 | error = xfs_attr_leaf_list_int(bp, context); |
1da177e4 | 1223 | xfs_da_brelse(NULL, bp); |
726801ba | 1224 | return XFS_ERROR(error); |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | ||
1228 | /*======================================================================== | |
1229 | * External routines when attribute list size > XFS_LBSIZE(mp). | |
1230 | *========================================================================*/ | |
1231 | ||
1232 | /* | |
1233 | * Add a name to a Btree-format attribute list. | |
1234 | * | |
1235 | * This will involve walking down the Btree, and may involve splitting | |
1236 | * leaf nodes and even splitting intermediate nodes up to and including | |
1237 | * the root node (a special case of an intermediate node). | |
1238 | * | |
1239 | * "Remote" attribute values confuse the issue and atomic rename operations | |
1240 | * add a whole extra layer of confusion on top of that. | |
1241 | */ | |
1242 | STATIC int | |
1243 | xfs_attr_node_addname(xfs_da_args_t *args) | |
1244 | { | |
1245 | xfs_da_state_t *state; | |
1246 | xfs_da_state_blk_t *blk; | |
1247 | xfs_inode_t *dp; | |
1248 | xfs_mount_t *mp; | |
1249 | int committed, retval, error; | |
1250 | ||
1251 | /* | |
1252 | * Fill in bucket of arguments/results/context to carry around. | |
1253 | */ | |
1254 | dp = args->dp; | |
1255 | mp = dp->i_mount; | |
1256 | restart: | |
1257 | state = xfs_da_state_alloc(); | |
1258 | state->args = args; | |
1259 | state->mp = mp; | |
1260 | state->blocksize = state->mp->m_sb.sb_blocksize; | |
1261 | state->node_ents = state->mp->m_attr_node_ents; | |
1262 | ||
1263 | /* | |
1264 | * Search to see if name already exists, and get back a pointer | |
1265 | * to where it should go. | |
1266 | */ | |
1267 | error = xfs_da_node_lookup_int(state, &retval); | |
1268 | if (error) | |
1269 | goto out; | |
1270 | blk = &state->path.blk[ state->path.active-1 ]; | |
1271 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1272 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { | |
1273 | goto out; | |
1274 | } else if (retval == EEXIST) { | |
1275 | if (args->flags & ATTR_CREATE) | |
1276 | goto out; | |
6a178100 | 1277 | args->op_flags |= XFS_DA_OP_RENAME; /* atomic rename op */ |
1da177e4 LT |
1278 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
1279 | args->index2 = args->index; | |
1280 | args->rmtblkno2 = args->rmtblkno; | |
1281 | args->rmtblkcnt2 = args->rmtblkcnt; | |
1282 | args->rmtblkno = 0; | |
1283 | args->rmtblkcnt = 0; | |
1284 | } | |
1285 | ||
1286 | retval = xfs_attr_leaf_add(blk->bp, state->args); | |
1287 | if (retval == ENOSPC) { | |
1288 | if (state->path.active == 1) { | |
1289 | /* | |
1290 | * Its really a single leaf node, but it had | |
1291 | * out-of-line values so it looked like it *might* | |
1292 | * have been a b-tree. | |
1293 | */ | |
1294 | xfs_da_state_free(state); | |
9d87c319 | 1295 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
1296 | error = xfs_attr_leaf_to_node(args); |
1297 | if (!error) { | |
1298 | error = xfs_bmap_finish(&args->trans, | |
1299 | args->flist, | |
1da177e4 LT |
1300 | &committed); |
1301 | } | |
1302 | if (error) { | |
1303 | ASSERT(committed); | |
1304 | args->trans = NULL; | |
1305 | xfs_bmap_cancel(args->flist); | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * bmap_finish() may have committed the last trans | |
1311 | * and started a new one. We need the inode to be | |
1312 | * in all transactions. | |
1313 | */ | |
1314 | if (committed) { | |
1315 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1316 | xfs_trans_ihold(args->trans, dp); | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Commit the node conversion and start the next | |
1321 | * trans in the chain. | |
1322 | */ | |
322ff6b8 NS |
1323 | error = xfs_trans_roll(&args->trans, dp); |
1324 | if (error) | |
1da177e4 LT |
1325 | goto out; |
1326 | ||
1327 | goto restart; | |
1328 | } | |
1329 | ||
1330 | /* | |
1331 | * Split as many Btree elements as required. | |
1332 | * This code tracks the new and old attr's location | |
1333 | * in the index/blkno/rmtblkno/rmtblkcnt fields and | |
1334 | * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields. | |
1335 | */ | |
9d87c319 | 1336 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
1337 | error = xfs_da_split(state); |
1338 | if (!error) { | |
1339 | error = xfs_bmap_finish(&args->trans, args->flist, | |
f7c99b6f | 1340 | &committed); |
1da177e4 LT |
1341 | } |
1342 | if (error) { | |
1343 | ASSERT(committed); | |
1344 | args->trans = NULL; | |
1345 | xfs_bmap_cancel(args->flist); | |
1346 | goto out; | |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * bmap_finish() may have committed the last trans and started | |
1351 | * a new one. We need the inode to be in all transactions. | |
1352 | */ | |
1353 | if (committed) { | |
1354 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1355 | xfs_trans_ihold(args->trans, dp); | |
1356 | } | |
1357 | } else { | |
1358 | /* | |
1359 | * Addition succeeded, update Btree hashvals. | |
1360 | */ | |
1361 | xfs_da_fixhashpath(state, &state->path); | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Kill the state structure, we're done with it and need to | |
1366 | * allow the buffers to come back later. | |
1367 | */ | |
1368 | xfs_da_state_free(state); | |
1369 | state = NULL; | |
1370 | ||
1371 | /* | |
1372 | * Commit the leaf addition or btree split and start the next | |
1373 | * trans in the chain. | |
1374 | */ | |
322ff6b8 NS |
1375 | error = xfs_trans_roll(&args->trans, dp); |
1376 | if (error) | |
1da177e4 LT |
1377 | goto out; |
1378 | ||
1379 | /* | |
1380 | * If there was an out-of-line value, allocate the blocks we | |
1381 | * identified for its storage and copy the value. This is done | |
1382 | * after we create the attribute so that we don't overflow the | |
1383 | * maximum size of a transaction and/or hit a deadlock. | |
1384 | */ | |
1385 | if (args->rmtblkno > 0) { | |
1386 | error = xfs_attr_rmtval_set(args); | |
1387 | if (error) | |
1388 | return(error); | |
1389 | } | |
1390 | ||
1391 | /* | |
1392 | * If this is an atomic rename operation, we must "flip" the | |
1393 | * incomplete flags on the "new" and "old" attribute/value pairs | |
1394 | * so that one disappears and one appears atomically. Then we | |
1395 | * must remove the "old" attribute/value pair. | |
1396 | */ | |
6a178100 | 1397 | if (args->op_flags & XFS_DA_OP_RENAME) { |
1da177e4 LT |
1398 | /* |
1399 | * In a separate transaction, set the incomplete flag on the | |
1400 | * "old" attr and clear the incomplete flag on the "new" attr. | |
1401 | */ | |
1402 | error = xfs_attr_leaf_flipflags(args); | |
1403 | if (error) | |
1404 | goto out; | |
1405 | ||
1406 | /* | |
1407 | * Dismantle the "old" attribute/value pair by removing | |
1408 | * a "remote" value (if it exists). | |
1409 | */ | |
1410 | args->index = args->index2; | |
1411 | args->blkno = args->blkno2; | |
1412 | args->rmtblkno = args->rmtblkno2; | |
1413 | args->rmtblkcnt = args->rmtblkcnt2; | |
1414 | if (args->rmtblkno) { | |
1415 | error = xfs_attr_rmtval_remove(args); | |
1416 | if (error) | |
1417 | return(error); | |
1418 | } | |
1419 | ||
1420 | /* | |
1421 | * Re-find the "old" attribute entry after any split ops. | |
1422 | * The INCOMPLETE flag means that we will find the "old" | |
1423 | * attr, not the "new" one. | |
1424 | */ | |
1425 | args->flags |= XFS_ATTR_INCOMPLETE; | |
1426 | state = xfs_da_state_alloc(); | |
1427 | state->args = args; | |
1428 | state->mp = mp; | |
1429 | state->blocksize = state->mp->m_sb.sb_blocksize; | |
1430 | state->node_ents = state->mp->m_attr_node_ents; | |
1431 | state->inleaf = 0; | |
1432 | error = xfs_da_node_lookup_int(state, &retval); | |
1433 | if (error) | |
1434 | goto out; | |
1435 | ||
1436 | /* | |
1437 | * Remove the name and update the hashvals in the tree. | |
1438 | */ | |
1439 | blk = &state->path.blk[ state->path.active-1 ]; | |
1440 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1441 | error = xfs_attr_leaf_remove(blk->bp, args); | |
1442 | xfs_da_fixhashpath(state, &state->path); | |
1443 | ||
1444 | /* | |
1445 | * Check to see if the tree needs to be collapsed. | |
1446 | */ | |
1447 | if (retval && (state->path.active > 1)) { | |
9d87c319 | 1448 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
1449 | error = xfs_da_join(state); |
1450 | if (!error) { | |
1451 | error = xfs_bmap_finish(&args->trans, | |
1452 | args->flist, | |
1da177e4 LT |
1453 | &committed); |
1454 | } | |
1455 | if (error) { | |
1456 | ASSERT(committed); | |
1457 | args->trans = NULL; | |
1458 | xfs_bmap_cancel(args->flist); | |
1459 | goto out; | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * bmap_finish() may have committed the last trans | |
1464 | * and started a new one. We need the inode to be | |
1465 | * in all transactions. | |
1466 | */ | |
1467 | if (committed) { | |
1468 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1469 | xfs_trans_ihold(args->trans, dp); | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Commit and start the next trans in the chain. | |
1475 | */ | |
322ff6b8 NS |
1476 | error = xfs_trans_roll(&args->trans, dp); |
1477 | if (error) | |
1da177e4 LT |
1478 | goto out; |
1479 | ||
1480 | } else if (args->rmtblkno > 0) { | |
1481 | /* | |
1482 | * Added a "remote" value, just clear the incomplete flag. | |
1483 | */ | |
1484 | error = xfs_attr_leaf_clearflag(args); | |
1485 | if (error) | |
1486 | goto out; | |
1487 | } | |
1488 | retval = error = 0; | |
1489 | ||
1490 | out: | |
1491 | if (state) | |
1492 | xfs_da_state_free(state); | |
1493 | if (error) | |
1494 | return(error); | |
1495 | return(retval); | |
1496 | } | |
1497 | ||
1498 | /* | |
1499 | * Remove a name from a B-tree attribute list. | |
1500 | * | |
1501 | * This will involve walking down the Btree, and may involve joining | |
1502 | * leaf nodes and even joining intermediate nodes up to and including | |
1503 | * the root node (a special case of an intermediate node). | |
1504 | */ | |
1505 | STATIC int | |
1506 | xfs_attr_node_removename(xfs_da_args_t *args) | |
1507 | { | |
1508 | xfs_da_state_t *state; | |
1509 | xfs_da_state_blk_t *blk; | |
1510 | xfs_inode_t *dp; | |
1511 | xfs_dabuf_t *bp; | |
d8cc890d | 1512 | int retval, error, committed, forkoff; |
1da177e4 LT |
1513 | |
1514 | /* | |
1515 | * Tie a string around our finger to remind us where we are. | |
1516 | */ | |
1517 | dp = args->dp; | |
1518 | state = xfs_da_state_alloc(); | |
1519 | state->args = args; | |
1520 | state->mp = dp->i_mount; | |
1521 | state->blocksize = state->mp->m_sb.sb_blocksize; | |
1522 | state->node_ents = state->mp->m_attr_node_ents; | |
1523 | ||
1524 | /* | |
1525 | * Search to see if name exists, and get back a pointer to it. | |
1526 | */ | |
1527 | error = xfs_da_node_lookup_int(state, &retval); | |
1528 | if (error || (retval != EEXIST)) { | |
1529 | if (error == 0) | |
1530 | error = retval; | |
1531 | goto out; | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * If there is an out-of-line value, de-allocate the blocks. | |
1536 | * This is done before we remove the attribute so that we don't | |
1537 | * overflow the maximum size of a transaction and/or hit a deadlock. | |
1538 | */ | |
1539 | blk = &state->path.blk[ state->path.active-1 ]; | |
1540 | ASSERT(blk->bp != NULL); | |
1541 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1542 | if (args->rmtblkno > 0) { | |
1543 | /* | |
1544 | * Fill in disk block numbers in the state structure | |
1545 | * so that we can get the buffers back after we commit | |
1546 | * several transactions in the following calls. | |
1547 | */ | |
1548 | error = xfs_attr_fillstate(state); | |
1549 | if (error) | |
1550 | goto out; | |
1551 | ||
1552 | /* | |
1553 | * Mark the attribute as INCOMPLETE, then bunmapi() the | |
1554 | * remote value. | |
1555 | */ | |
1556 | error = xfs_attr_leaf_setflag(args); | |
1557 | if (error) | |
1558 | goto out; | |
1559 | error = xfs_attr_rmtval_remove(args); | |
1560 | if (error) | |
1561 | goto out; | |
1562 | ||
1563 | /* | |
1564 | * Refill the state structure with buffers, the prior calls | |
1565 | * released our buffers. | |
1566 | */ | |
1567 | error = xfs_attr_refillstate(state); | |
1568 | if (error) | |
1569 | goto out; | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * Remove the name and update the hashvals in the tree. | |
1574 | */ | |
1575 | blk = &state->path.blk[ state->path.active-1 ]; | |
1576 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1577 | retval = xfs_attr_leaf_remove(blk->bp, args); | |
1578 | xfs_da_fixhashpath(state, &state->path); | |
1579 | ||
1580 | /* | |
1581 | * Check to see if the tree needs to be collapsed. | |
1582 | */ | |
1583 | if (retval && (state->path.active > 1)) { | |
9d87c319 | 1584 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
1585 | error = xfs_da_join(state); |
1586 | if (!error) { | |
1587 | error = xfs_bmap_finish(&args->trans, args->flist, | |
f7c99b6f | 1588 | &committed); |
1da177e4 LT |
1589 | } |
1590 | if (error) { | |
1591 | ASSERT(committed); | |
1592 | args->trans = NULL; | |
1593 | xfs_bmap_cancel(args->flist); | |
1594 | goto out; | |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * bmap_finish() may have committed the last trans and started | |
1599 | * a new one. We need the inode to be in all transactions. | |
1600 | */ | |
1601 | if (committed) { | |
1602 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1603 | xfs_trans_ihold(args->trans, dp); | |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * Commit the Btree join operation and start a new trans. | |
1608 | */ | |
322ff6b8 NS |
1609 | error = xfs_trans_roll(&args->trans, dp); |
1610 | if (error) | |
1da177e4 LT |
1611 | goto out; |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * If the result is small enough, push it all into the inode. | |
1616 | */ | |
1617 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { | |
1618 | /* | |
1619 | * Have to get rid of the copy of this dabuf in the state. | |
1620 | */ | |
1621 | ASSERT(state->path.active == 1); | |
1622 | ASSERT(state->path.blk[0].bp); | |
1623 | xfs_da_buf_done(state->path.blk[0].bp); | |
1624 | state->path.blk[0].bp = NULL; | |
1625 | ||
1626 | error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, | |
1627 | XFS_ATTR_FORK); | |
1628 | if (error) | |
1629 | goto out; | |
89da0544 NS |
1630 | ASSERT(be16_to_cpu(((xfs_attr_leafblock_t *) |
1631 | bp->data)->hdr.info.magic) | |
1da177e4 LT |
1632 | == XFS_ATTR_LEAF_MAGIC); |
1633 | ||
d8cc890d | 1634 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
9d87c319 | 1635 | xfs_bmap_init(args->flist, args->firstblock); |
d8cc890d | 1636 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
1da177e4 LT |
1637 | /* bp is gone due to xfs_da_shrink_inode */ |
1638 | if (!error) { | |
1639 | error = xfs_bmap_finish(&args->trans, | |
1640 | args->flist, | |
1da177e4 LT |
1641 | &committed); |
1642 | } | |
1643 | if (error) { | |
1644 | ASSERT(committed); | |
1645 | args->trans = NULL; | |
1646 | xfs_bmap_cancel(args->flist); | |
1647 | goto out; | |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * bmap_finish() may have committed the last trans | |
1652 | * and started a new one. We need the inode to be | |
1653 | * in all transactions. | |
1654 | */ | |
1655 | if (committed) { | |
1656 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
1657 | xfs_trans_ihold(args->trans, dp); | |
1658 | } | |
1659 | } else | |
1660 | xfs_da_brelse(args->trans, bp); | |
1661 | } | |
1662 | error = 0; | |
1663 | ||
1664 | out: | |
1665 | xfs_da_state_free(state); | |
1666 | return(error); | |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Fill in the disk block numbers in the state structure for the buffers | |
1671 | * that are attached to the state structure. | |
1672 | * This is done so that we can quickly reattach ourselves to those buffers | |
c41564b5 | 1673 | * after some set of transaction commits have released these buffers. |
1da177e4 LT |
1674 | */ |
1675 | STATIC int | |
1676 | xfs_attr_fillstate(xfs_da_state_t *state) | |
1677 | { | |
1678 | xfs_da_state_path_t *path; | |
1679 | xfs_da_state_blk_t *blk; | |
1680 | int level; | |
1681 | ||
1682 | /* | |
1683 | * Roll down the "path" in the state structure, storing the on-disk | |
1684 | * block number for those buffers in the "path". | |
1685 | */ | |
1686 | path = &state->path; | |
1687 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); | |
1688 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { | |
1689 | if (blk->bp) { | |
1690 | blk->disk_blkno = xfs_da_blkno(blk->bp); | |
1691 | xfs_da_buf_done(blk->bp); | |
1692 | blk->bp = NULL; | |
1693 | } else { | |
1694 | blk->disk_blkno = 0; | |
1695 | } | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | * Roll down the "altpath" in the state structure, storing the on-disk | |
1700 | * block number for those buffers in the "altpath". | |
1701 | */ | |
1702 | path = &state->altpath; | |
1703 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); | |
1704 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { | |
1705 | if (blk->bp) { | |
1706 | blk->disk_blkno = xfs_da_blkno(blk->bp); | |
1707 | xfs_da_buf_done(blk->bp); | |
1708 | blk->bp = NULL; | |
1709 | } else { | |
1710 | blk->disk_blkno = 0; | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | return(0); | |
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * Reattach the buffers to the state structure based on the disk block | |
1719 | * numbers stored in the state structure. | |
c41564b5 | 1720 | * This is done after some set of transaction commits have released those |
1da177e4 LT |
1721 | * buffers from our grip. |
1722 | */ | |
1723 | STATIC int | |
1724 | xfs_attr_refillstate(xfs_da_state_t *state) | |
1725 | { | |
1726 | xfs_da_state_path_t *path; | |
1727 | xfs_da_state_blk_t *blk; | |
1728 | int level, error; | |
1729 | ||
1730 | /* | |
1731 | * Roll down the "path" in the state structure, storing the on-disk | |
1732 | * block number for those buffers in the "path". | |
1733 | */ | |
1734 | path = &state->path; | |
1735 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); | |
1736 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { | |
1737 | if (blk->disk_blkno) { | |
1738 | error = xfs_da_read_buf(state->args->trans, | |
1739 | state->args->dp, | |
1740 | blk->blkno, blk->disk_blkno, | |
1741 | &blk->bp, XFS_ATTR_FORK); | |
1742 | if (error) | |
1743 | return(error); | |
1744 | } else { | |
1745 | blk->bp = NULL; | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | /* | |
1750 | * Roll down the "altpath" in the state structure, storing the on-disk | |
1751 | * block number for those buffers in the "altpath". | |
1752 | */ | |
1753 | path = &state->altpath; | |
1754 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); | |
1755 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { | |
1756 | if (blk->disk_blkno) { | |
1757 | error = xfs_da_read_buf(state->args->trans, | |
1758 | state->args->dp, | |
1759 | blk->blkno, blk->disk_blkno, | |
1760 | &blk->bp, XFS_ATTR_FORK); | |
1761 | if (error) | |
1762 | return(error); | |
1763 | } else { | |
1764 | blk->bp = NULL; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | return(0); | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * Look up a filename in a node attribute list. | |
1773 | * | |
1774 | * This routine gets called for any attribute fork that has more than one | |
1775 | * block, ie: both true Btree attr lists and for single-leaf-blocks with | |
1776 | * "remote" values taking up more blocks. | |
1777 | */ | |
ba0f32d4 | 1778 | STATIC int |
1da177e4 LT |
1779 | xfs_attr_node_get(xfs_da_args_t *args) |
1780 | { | |
1781 | xfs_da_state_t *state; | |
1782 | xfs_da_state_blk_t *blk; | |
1783 | int error, retval; | |
1784 | int i; | |
1785 | ||
1786 | state = xfs_da_state_alloc(); | |
1787 | state->args = args; | |
1788 | state->mp = args->dp->i_mount; | |
1789 | state->blocksize = state->mp->m_sb.sb_blocksize; | |
1790 | state->node_ents = state->mp->m_attr_node_ents; | |
1791 | ||
1792 | /* | |
1793 | * Search to see if name exists, and get back a pointer to it. | |
1794 | */ | |
1795 | error = xfs_da_node_lookup_int(state, &retval); | |
1796 | if (error) { | |
1797 | retval = error; | |
1798 | } else if (retval == EEXIST) { | |
1799 | blk = &state->path.blk[ state->path.active-1 ]; | |
1800 | ASSERT(blk->bp != NULL); | |
1801 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1802 | ||
1803 | /* | |
1804 | * Get the value, local or "remote" | |
1805 | */ | |
1806 | retval = xfs_attr_leaf_getvalue(blk->bp, args); | |
1807 | if (!retval && (args->rmtblkno > 0) | |
1808 | && !(args->flags & ATTR_KERNOVAL)) { | |
1809 | retval = xfs_attr_rmtval_get(args); | |
1810 | } | |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * If not in a transaction, we have to release all the buffers. | |
1815 | */ | |
1816 | for (i = 0; i < state->path.active; i++) { | |
1817 | xfs_da_brelse(args->trans, state->path.blk[i].bp); | |
1818 | state->path.blk[i].bp = NULL; | |
1819 | } | |
1820 | ||
1821 | xfs_da_state_free(state); | |
1822 | return(retval); | |
1823 | } | |
1824 | ||
1825 | STATIC int /* error */ | |
1826 | xfs_attr_node_list(xfs_attr_list_context_t *context) | |
1827 | { | |
1828 | attrlist_cursor_kern_t *cursor; | |
1829 | xfs_attr_leafblock_t *leaf; | |
1830 | xfs_da_intnode_t *node; | |
1831 | xfs_da_node_entry_t *btree; | |
1832 | int error, i; | |
1833 | xfs_dabuf_t *bp; | |
1834 | ||
1835 | cursor = context->cursor; | |
1836 | cursor->initted = 1; | |
1837 | ||
1838 | /* | |
1839 | * Do all sorts of validation on the passed-in cursor structure. | |
1840 | * If anything is amiss, ignore the cursor and look up the hashval | |
1841 | * starting from the btree root. | |
1842 | */ | |
1843 | bp = NULL; | |
1844 | if (cursor->blkno > 0) { | |
1845 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, | |
1846 | &bp, XFS_ATTR_FORK); | |
1847 | if ((error != 0) && (error != EFSCORRUPTED)) | |
1848 | return(error); | |
1849 | if (bp) { | |
1850 | node = bp->data; | |
89da0544 | 1851 | switch (be16_to_cpu(node->hdr.info.magic)) { |
1da177e4 | 1852 | case XFS_DA_NODE_MAGIC: |
0b1b213f | 1853 | trace_xfs_attr_list_wrong_blk(context); |
1da177e4 LT |
1854 | xfs_da_brelse(NULL, bp); |
1855 | bp = NULL; | |
1856 | break; | |
1857 | case XFS_ATTR_LEAF_MAGIC: | |
1858 | leaf = bp->data; | |
6b19f2d8 NS |
1859 | if (cursor->hashval > be32_to_cpu(leaf->entries[ |
1860 | be16_to_cpu(leaf->hdr.count)-1].hashval)) { | |
0b1b213f | 1861 | trace_xfs_attr_list_wrong_blk(context); |
1da177e4 LT |
1862 | xfs_da_brelse(NULL, bp); |
1863 | bp = NULL; | |
1864 | } else if (cursor->hashval <= | |
6b19f2d8 | 1865 | be32_to_cpu(leaf->entries[0].hashval)) { |
0b1b213f | 1866 | trace_xfs_attr_list_wrong_blk(context); |
1da177e4 LT |
1867 | xfs_da_brelse(NULL, bp); |
1868 | bp = NULL; | |
1869 | } | |
1870 | break; | |
1871 | default: | |
0b1b213f | 1872 | trace_xfs_attr_list_wrong_blk(context); |
1da177e4 LT |
1873 | xfs_da_brelse(NULL, bp); |
1874 | bp = NULL; | |
1875 | } | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * We did not find what we expected given the cursor's contents, | |
1881 | * so we start from the top and work down based on the hash value. | |
1882 | * Note that start of node block is same as start of leaf block. | |
1883 | */ | |
1884 | if (bp == NULL) { | |
1885 | cursor->blkno = 0; | |
1886 | for (;;) { | |
1887 | error = xfs_da_read_buf(NULL, context->dp, | |
1888 | cursor->blkno, -1, &bp, | |
1889 | XFS_ATTR_FORK); | |
1890 | if (error) | |
1891 | return(error); | |
1892 | if (unlikely(bp == NULL)) { | |
1893 | XFS_ERROR_REPORT("xfs_attr_node_list(2)", | |
1894 | XFS_ERRLEVEL_LOW, | |
1895 | context->dp->i_mount); | |
1896 | return(XFS_ERROR(EFSCORRUPTED)); | |
1897 | } | |
1898 | node = bp->data; | |
89da0544 | 1899 | if (be16_to_cpu(node->hdr.info.magic) |
1da177e4 LT |
1900 | == XFS_ATTR_LEAF_MAGIC) |
1901 | break; | |
89da0544 | 1902 | if (unlikely(be16_to_cpu(node->hdr.info.magic) |
1da177e4 LT |
1903 | != XFS_DA_NODE_MAGIC)) { |
1904 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)", | |
1905 | XFS_ERRLEVEL_LOW, | |
1906 | context->dp->i_mount, | |
1907 | node); | |
1908 | xfs_da_brelse(NULL, bp); | |
1909 | return(XFS_ERROR(EFSCORRUPTED)); | |
1910 | } | |
1911 | btree = node->btree; | |
fac80cce | 1912 | for (i = 0; i < be16_to_cpu(node->hdr.count); |
1da177e4 LT |
1913 | btree++, i++) { |
1914 | if (cursor->hashval | |
403432dc NS |
1915 | <= be32_to_cpu(btree->hashval)) { |
1916 | cursor->blkno = be32_to_cpu(btree->before); | |
0b1b213f CH |
1917 | trace_xfs_attr_list_node_descend(context, |
1918 | btree); | |
1da177e4 LT |
1919 | break; |
1920 | } | |
1921 | } | |
fac80cce | 1922 | if (i == be16_to_cpu(node->hdr.count)) { |
1da177e4 LT |
1923 | xfs_da_brelse(NULL, bp); |
1924 | return(0); | |
1925 | } | |
1926 | xfs_da_brelse(NULL, bp); | |
1927 | } | |
1928 | } | |
1929 | ASSERT(bp != NULL); | |
1930 | ||
1931 | /* | |
1932 | * Roll upward through the blocks, processing each leaf block in | |
1933 | * order. As long as there is space in the result buffer, keep | |
1934 | * adding the information. | |
1935 | */ | |
1936 | for (;;) { | |
1937 | leaf = bp->data; | |
89da0544 | 1938 | if (unlikely(be16_to_cpu(leaf->hdr.info.magic) |
1da177e4 LT |
1939 | != XFS_ATTR_LEAF_MAGIC)) { |
1940 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", | |
1941 | XFS_ERRLEVEL_LOW, | |
1942 | context->dp->i_mount, leaf); | |
1943 | xfs_da_brelse(NULL, bp); | |
1944 | return(XFS_ERROR(EFSCORRUPTED)); | |
1945 | } | |
1946 | error = xfs_attr_leaf_list_int(bp, context); | |
726801ba TS |
1947 | if (error) { |
1948 | xfs_da_brelse(NULL, bp); | |
1949 | return error; | |
1950 | } | |
1951 | if (context->seen_enough || leaf->hdr.info.forw == 0) | |
1952 | break; | |
89da0544 | 1953 | cursor->blkno = be32_to_cpu(leaf->hdr.info.forw); |
1da177e4 LT |
1954 | xfs_da_brelse(NULL, bp); |
1955 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, | |
1956 | &bp, XFS_ATTR_FORK); | |
1957 | if (error) | |
1958 | return(error); | |
1959 | if (unlikely((bp == NULL))) { | |
1960 | XFS_ERROR_REPORT("xfs_attr_node_list(5)", | |
1961 | XFS_ERRLEVEL_LOW, | |
1962 | context->dp->i_mount); | |
1963 | return(XFS_ERROR(EFSCORRUPTED)); | |
1964 | } | |
1965 | } | |
1966 | xfs_da_brelse(NULL, bp); | |
1967 | return(0); | |
1968 | } | |
1969 | ||
1970 | ||
1971 | /*======================================================================== | |
1972 | * External routines for manipulating out-of-line attribute values. | |
1973 | *========================================================================*/ | |
1974 | ||
1975 | /* | |
1976 | * Read the value associated with an attribute from the out-of-line buffer | |
1977 | * that we stored it in. | |
1978 | */ | |
726801ba | 1979 | int |
1da177e4 LT |
1980 | xfs_attr_rmtval_get(xfs_da_args_t *args) |
1981 | { | |
1982 | xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE]; | |
1983 | xfs_mount_t *mp; | |
1984 | xfs_daddr_t dblkno; | |
a9273ca5 | 1985 | void *dst; |
1da177e4 LT |
1986 | xfs_buf_t *bp; |
1987 | int nmap, error, tmp, valuelen, blkcnt, i; | |
1988 | xfs_dablk_t lblkno; | |
1989 | ||
1990 | ASSERT(!(args->flags & ATTR_KERNOVAL)); | |
1991 | ||
1992 | mp = args->dp->i_mount; | |
1993 | dst = args->value; | |
1994 | valuelen = args->valuelen; | |
1995 | lblkno = args->rmtblkno; | |
1996 | while (valuelen > 0) { | |
1997 | nmap = ATTR_RMTVALUE_MAPSIZE; | |
1998 | error = xfs_bmapi(args->trans, args->dp, (xfs_fileoff_t)lblkno, | |
1999 | args->rmtblkcnt, | |
2000 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
3e57ecf6 | 2001 | NULL, 0, map, &nmap, NULL, NULL); |
1da177e4 LT |
2002 | if (error) |
2003 | return(error); | |
2004 | ASSERT(nmap >= 1); | |
2005 | ||
2006 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { | |
2007 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && | |
2008 | (map[i].br_startblock != HOLESTARTBLOCK)); | |
2009 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); | |
2010 | blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); | |
2011 | error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno, | |
0cadda1c | 2012 | blkcnt, XBF_LOCK | XBF_DONT_BLOCK, |
ddd3a14e | 2013 | &bp); |
1da177e4 LT |
2014 | if (error) |
2015 | return(error); | |
2016 | ||
2017 | tmp = (valuelen < XFS_BUF_SIZE(bp)) | |
2018 | ? valuelen : XFS_BUF_SIZE(bp); | |
0cadda1c | 2019 | xfs_biomove(bp, 0, tmp, dst, XBF_READ); |
1da177e4 LT |
2020 | xfs_buf_relse(bp); |
2021 | dst += tmp; | |
2022 | valuelen -= tmp; | |
2023 | ||
2024 | lblkno += map[i].br_blockcount; | |
2025 | } | |
2026 | } | |
2027 | ASSERT(valuelen == 0); | |
2028 | return(0); | |
2029 | } | |
2030 | ||
2031 | /* | |
2032 | * Write the value associated with an attribute into the out-of-line buffer | |
2033 | * that we have defined for it. | |
2034 | */ | |
2035 | STATIC int | |
2036 | xfs_attr_rmtval_set(xfs_da_args_t *args) | |
2037 | { | |
2038 | xfs_mount_t *mp; | |
2039 | xfs_fileoff_t lfileoff; | |
2040 | xfs_inode_t *dp; | |
2041 | xfs_bmbt_irec_t map; | |
2042 | xfs_daddr_t dblkno; | |
a9273ca5 | 2043 | void *src; |
1da177e4 LT |
2044 | xfs_buf_t *bp; |
2045 | xfs_dablk_t lblkno; | |
2046 | int blkcnt, valuelen, nmap, error, tmp, committed; | |
2047 | ||
2048 | dp = args->dp; | |
2049 | mp = dp->i_mount; | |
2050 | src = args->value; | |
2051 | ||
2052 | /* | |
2053 | * Find a "hole" in the attribute address space large enough for | |
2054 | * us to drop the new attribute's value into. | |
2055 | */ | |
2056 | blkcnt = XFS_B_TO_FSB(mp, args->valuelen); | |
2057 | lfileoff = 0; | |
2058 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, | |
2059 | XFS_ATTR_FORK); | |
2060 | if (error) { | |
2061 | return(error); | |
2062 | } | |
2063 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; | |
2064 | args->rmtblkcnt = blkcnt; | |
2065 | ||
2066 | /* | |
2067 | * Roll through the "value", allocating blocks on disk as required. | |
2068 | */ | |
2069 | while (blkcnt > 0) { | |
2070 | /* | |
2071 | * Allocate a single extent, up to the size of the value. | |
2072 | */ | |
9d87c319 | 2073 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
2074 | nmap = 1; |
2075 | error = xfs_bmapi(args->trans, dp, (xfs_fileoff_t)lblkno, | |
2076 | blkcnt, | |
2077 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA | | |
2078 | XFS_BMAPI_WRITE, | |
2079 | args->firstblock, args->total, &map, &nmap, | |
3e57ecf6 | 2080 | args->flist, NULL); |
1da177e4 LT |
2081 | if (!error) { |
2082 | error = xfs_bmap_finish(&args->trans, args->flist, | |
f7c99b6f | 2083 | &committed); |
1da177e4 LT |
2084 | } |
2085 | if (error) { | |
2086 | ASSERT(committed); | |
2087 | args->trans = NULL; | |
2088 | xfs_bmap_cancel(args->flist); | |
2089 | return(error); | |
2090 | } | |
2091 | ||
2092 | /* | |
2093 | * bmap_finish() may have committed the last trans and started | |
2094 | * a new one. We need the inode to be in all transactions. | |
2095 | */ | |
2096 | if (committed) { | |
2097 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); | |
2098 | xfs_trans_ihold(args->trans, dp); | |
2099 | } | |
2100 | ||
2101 | ASSERT(nmap == 1); | |
2102 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
2103 | (map.br_startblock != HOLESTARTBLOCK)); | |
2104 | lblkno += map.br_blockcount; | |
2105 | blkcnt -= map.br_blockcount; | |
2106 | ||
2107 | /* | |
2108 | * Start the next trans in the chain. | |
2109 | */ | |
322ff6b8 NS |
2110 | error = xfs_trans_roll(&args->trans, dp); |
2111 | if (error) | |
1da177e4 LT |
2112 | return (error); |
2113 | } | |
2114 | ||
2115 | /* | |
2116 | * Roll through the "value", copying the attribute value to the | |
2117 | * already-allocated blocks. Blocks are written synchronously | |
2118 | * so that we can know they are all on disk before we turn off | |
2119 | * the INCOMPLETE flag. | |
2120 | */ | |
2121 | lblkno = args->rmtblkno; | |
2122 | valuelen = args->valuelen; | |
2123 | while (valuelen > 0) { | |
2124 | /* | |
2125 | * Try to remember where we decided to put the value. | |
2126 | */ | |
9d87c319 | 2127 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
2128 | nmap = 1; |
2129 | error = xfs_bmapi(NULL, dp, (xfs_fileoff_t)lblkno, | |
2130 | args->rmtblkcnt, | |
2131 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
3e57ecf6 OW |
2132 | args->firstblock, 0, &map, &nmap, |
2133 | NULL, NULL); | |
1da177e4 LT |
2134 | if (error) { |
2135 | return(error); | |
2136 | } | |
2137 | ASSERT(nmap == 1); | |
2138 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
2139 | (map.br_startblock != HOLESTARTBLOCK)); | |
2140 | ||
2141 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
2142 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); | |
2143 | ||
6ad112bf | 2144 | bp = xfs_buf_get(mp->m_ddev_targp, dblkno, blkcnt, |
0cadda1c | 2145 | XBF_LOCK | XBF_DONT_BLOCK); |
1da177e4 LT |
2146 | ASSERT(bp); |
2147 | ASSERT(!XFS_BUF_GETERROR(bp)); | |
2148 | ||
2149 | tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen : | |
2150 | XFS_BUF_SIZE(bp); | |
0cadda1c | 2151 | xfs_biomove(bp, 0, tmp, src, XBF_WRITE); |
1da177e4 LT |
2152 | if (tmp < XFS_BUF_SIZE(bp)) |
2153 | xfs_biozero(bp, tmp, XFS_BUF_SIZE(bp) - tmp); | |
2154 | if ((error = xfs_bwrite(mp, bp))) {/* GROT: NOTE: synchronous write */ | |
2155 | return (error); | |
2156 | } | |
2157 | src += tmp; | |
2158 | valuelen -= tmp; | |
2159 | ||
2160 | lblkno += map.br_blockcount; | |
2161 | } | |
2162 | ASSERT(valuelen == 0); | |
2163 | return(0); | |
2164 | } | |
2165 | ||
2166 | /* | |
2167 | * Remove the value associated with an attribute by deleting the | |
2168 | * out-of-line buffer that it is stored on. | |
2169 | */ | |
2170 | STATIC int | |
2171 | xfs_attr_rmtval_remove(xfs_da_args_t *args) | |
2172 | { | |
2173 | xfs_mount_t *mp; | |
2174 | xfs_bmbt_irec_t map; | |
2175 | xfs_buf_t *bp; | |
2176 | xfs_daddr_t dblkno; | |
2177 | xfs_dablk_t lblkno; | |
2178 | int valuelen, blkcnt, nmap, error, done, committed; | |
2179 | ||
2180 | mp = args->dp->i_mount; | |
2181 | ||
2182 | /* | |
2183 | * Roll through the "value", invalidating the attribute value's | |
2184 | * blocks. | |
2185 | */ | |
2186 | lblkno = args->rmtblkno; | |
2187 | valuelen = args->rmtblkcnt; | |
2188 | while (valuelen > 0) { | |
2189 | /* | |
2190 | * Try to remember where we decided to put the value. | |
2191 | */ | |
9d87c319 | 2192 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
2193 | nmap = 1; |
2194 | error = xfs_bmapi(NULL, args->dp, (xfs_fileoff_t)lblkno, | |
2195 | args->rmtblkcnt, | |
2196 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
2197 | args->firstblock, 0, &map, &nmap, | |
3e57ecf6 | 2198 | args->flist, NULL); |
1da177e4 LT |
2199 | if (error) { |
2200 | return(error); | |
2201 | } | |
2202 | ASSERT(nmap == 1); | |
2203 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
2204 | (map.br_startblock != HOLESTARTBLOCK)); | |
2205 | ||
2206 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), | |
2207 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); | |
2208 | ||
2209 | /* | |
2210 | * If the "remote" value is in the cache, remove it. | |
2211 | */ | |
0cadda1c | 2212 | bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, XBF_TRYLOCK); |
1da177e4 LT |
2213 | if (bp) { |
2214 | XFS_BUF_STALE(bp); | |
2215 | XFS_BUF_UNDELAYWRITE(bp); | |
2216 | xfs_buf_relse(bp); | |
2217 | bp = NULL; | |
2218 | } | |
2219 | ||
2220 | valuelen -= map.br_blockcount; | |
2221 | ||
2222 | lblkno += map.br_blockcount; | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * Keep de-allocating extents until the remote-value region is gone. | |
2227 | */ | |
2228 | lblkno = args->rmtblkno; | |
2229 | blkcnt = args->rmtblkcnt; | |
2230 | done = 0; | |
2231 | while (!done) { | |
9d87c319 | 2232 | xfs_bmap_init(args->flist, args->firstblock); |
1da177e4 LT |
2233 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, |
2234 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
3e57ecf6 OW |
2235 | 1, args->firstblock, args->flist, |
2236 | NULL, &done); | |
1da177e4 LT |
2237 | if (!error) { |
2238 | error = xfs_bmap_finish(&args->trans, args->flist, | |
f7c99b6f | 2239 | &committed); |
1da177e4 LT |
2240 | } |
2241 | if (error) { | |
2242 | ASSERT(committed); | |
2243 | args->trans = NULL; | |
2244 | xfs_bmap_cancel(args->flist); | |
2245 | return(error); | |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * bmap_finish() may have committed the last trans and started | |
2250 | * a new one. We need the inode to be in all transactions. | |
2251 | */ | |
2252 | if (committed) { | |
2253 | xfs_trans_ijoin(args->trans, args->dp, XFS_ILOCK_EXCL); | |
2254 | xfs_trans_ihold(args->trans, args->dp); | |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * Close out trans and start the next one in the chain. | |
2259 | */ | |
322ff6b8 NS |
2260 | error = xfs_trans_roll(&args->trans, args->dp); |
2261 | if (error) | |
1da177e4 LT |
2262 | return (error); |
2263 | } | |
2264 | return(0); | |
2265 | } |