Commit | Line | Data |
---|---|---|
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 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 | 27 | #include "xfs_mount.h" |
a844f451 | 28 | #include "xfs_da_btree.h" |
1da177e4 | 29 | #include "xfs_bmap_btree.h" |
a844f451 | 30 | #include "xfs_alloc_btree.h" |
1da177e4 LT |
31 | #include "xfs_ialloc_btree.h" |
32 | #include "xfs_alloc.h" | |
33 | #include "xfs_btree.h" | |
a844f451 | 34 | #include "xfs_attr_sf.h" |
1da177e4 | 35 | #include "xfs_dinode.h" |
1da177e4 | 36 | #include "xfs_inode.h" |
a844f451 | 37 | #include "xfs_inode_item.h" |
1da177e4 | 38 | #include "xfs_bmap.h" |
1da177e4 LT |
39 | #include "xfs_attr.h" |
40 | #include "xfs_attr_leaf.h" | |
41 | #include "xfs_error.h" | |
0b1b213f | 42 | #include "xfs_trace.h" |
1da177e4 LT |
43 | |
44 | /* | |
45 | * xfs_attr_leaf.c | |
46 | * | |
47 | * Routines to implement leaf blocks of attributes as Btrees of hashed names. | |
48 | */ | |
49 | ||
50 | /*======================================================================== | |
51 | * Function prototypes for the kernel. | |
52 | *========================================================================*/ | |
53 | ||
54 | /* | |
55 | * Routines used for growing the Btree. | |
56 | */ | |
ba0f32d4 CH |
57 | STATIC int xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t which_block, |
58 | xfs_dabuf_t **bpp); | |
1da177e4 LT |
59 | STATIC int xfs_attr_leaf_add_work(xfs_dabuf_t *leaf_buffer, xfs_da_args_t *args, |
60 | int freemap_index); | |
61 | STATIC void xfs_attr_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *leaf_buffer); | |
62 | STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state, | |
63 | xfs_da_state_blk_t *blk1, | |
64 | xfs_da_state_blk_t *blk2); | |
65 | STATIC int xfs_attr_leaf_figure_balance(xfs_da_state_t *state, | |
66 | xfs_da_state_blk_t *leaf_blk_1, | |
67 | xfs_da_state_blk_t *leaf_blk_2, | |
68 | int *number_entries_in_blk1, | |
69 | int *number_usedbytes_in_blk1); | |
70 | ||
ba0f32d4 CH |
71 | /* |
72 | * Routines used for shrinking the Btree. | |
73 | */ | |
74 | STATIC int xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, | |
75 | xfs_dabuf_t *bp, int level); | |
76 | STATIC int xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, | |
77 | xfs_dabuf_t *bp); | |
78 | STATIC int xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp, | |
79 | xfs_dablk_t blkno, int blkcnt); | |
80 | ||
1da177e4 LT |
81 | /* |
82 | * Utility routines. | |
83 | */ | |
84 | STATIC void xfs_attr_leaf_moveents(xfs_attr_leafblock_t *src_leaf, | |
85 | int src_start, | |
86 | xfs_attr_leafblock_t *dst_leaf, | |
87 | int dst_start, int move_count, | |
88 | xfs_mount_t *mp); | |
ba0f32d4 | 89 | STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index); |
726801ba TS |
90 | |
91 | /*======================================================================== | |
92 | * Namespace helper routines | |
93 | *========================================================================*/ | |
94 | ||
726801ba TS |
95 | /* |
96 | * If namespace bits don't match return 0. | |
97 | * If all match then return 1. | |
98 | */ | |
b8f82a4a | 99 | STATIC int |
726801ba TS |
100 | xfs_attr_namesp_match(int arg_flags, int ondisk_flags) |
101 | { | |
102 | return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags); | |
103 | } | |
104 | ||
1da177e4 LT |
105 | |
106 | /*======================================================================== | |
d8cc890d | 107 | * External routines when attribute fork size < XFS_LITINO(mp). |
1da177e4 LT |
108 | *========================================================================*/ |
109 | ||
110 | /* | |
d8cc890d NS |
111 | * Query whether the requested number of additional bytes of extended |
112 | * attribute space will be able to fit inline. | |
4c393a60 | 113 | * |
d8cc890d NS |
114 | * Returns zero if not, else the di_forkoff fork offset to be used in the |
115 | * literal area for attribute data once the new bytes have been added. | |
116 | * | |
117 | * di_forkoff must be 8 byte aligned, hence is stored as a >>3 value; | |
118 | * special case for dev/uuid inodes, they have fixed size data forks. | |
1da177e4 LT |
119 | */ |
120 | int | |
d8cc890d NS |
121 | xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes) |
122 | { | |
123 | int offset; | |
124 | int minforkoff; /* lower limit on valid forkoff locations */ | |
125 | int maxforkoff; /* upper limit on valid forkoff locations */ | |
4c393a60 | 126 | int dsize; |
d8cc890d NS |
127 | xfs_mount_t *mp = dp->i_mount; |
128 | ||
d8cc890d NS |
129 | offset = (XFS_LITINO(mp) - bytes) >> 3; /* rounded down */ |
130 | ||
131 | switch (dp->i_d.di_format) { | |
132 | case XFS_DINODE_FMT_DEV: | |
133 | minforkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
134 | return (offset >= minforkoff) ? minforkoff : 0; | |
135 | case XFS_DINODE_FMT_UUID: | |
136 | minforkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
137 | return (offset >= minforkoff) ? minforkoff : 0; | |
138 | } | |
139 | ||
4c393a60 CH |
140 | /* |
141 | * If the requested numbers of bytes is smaller or equal to the | |
142 | * current attribute fork size we can always proceed. | |
143 | * | |
144 | * Note that if_bytes in the data fork might actually be larger than | |
145 | * the current data fork size is due to delalloc extents. In that | |
146 | * case either the extent count will go down when they are converted | |
147 | * to real extents, or the delalloc conversion will take care of the | |
148 | * literal area rebalancing. | |
149 | */ | |
150 | if (bytes <= XFS_IFORK_ASIZE(dp)) | |
151 | return dp->i_d.di_forkoff; | |
152 | ||
153 | /* | |
154 | * For attr2 we can try to move the forkoff if there is space in the | |
155 | * literal area, but for the old format we are done if there is no | |
156 | * space in the fixed attribute fork. | |
157 | */ | |
158 | if (!(mp->m_flags & XFS_MOUNT_ATTR2)) | |
da087bad | 159 | return 0; |
da087bad | 160 | |
e5889e90 | 161 | dsize = dp->i_df.if_bytes; |
4c393a60 | 162 | |
e5889e90 BN |
163 | switch (dp->i_d.di_format) { |
164 | case XFS_DINODE_FMT_EXTENTS: | |
4c393a60 | 165 | /* |
e5889e90 | 166 | * If there is no attr fork and the data fork is extents, |
4c393a60 CH |
167 | * determine if creating the default attr fork will result |
168 | * in the extents form migrating to btree. If so, the | |
169 | * minimum offset only needs to be the space required for | |
e5889e90 | 170 | * the btree root. |
4c393a60 | 171 | */ |
1a5902c5 CH |
172 | if (!dp->i_d.di_forkoff && dp->i_df.if_bytes > |
173 | xfs_default_attroffset(dp)) | |
e5889e90 BN |
174 | dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS); |
175 | break; | |
e5889e90 BN |
176 | case XFS_DINODE_FMT_BTREE: |
177 | /* | |
4c393a60 CH |
178 | * If we have a data btree then keep forkoff if we have one, |
179 | * otherwise we are adding a new attr, so then we set | |
180 | * minforkoff to where the btree root can finish so we have | |
e5889e90 BN |
181 | * plenty of room for attrs |
182 | */ | |
183 | if (dp->i_d.di_forkoff) { | |
4c393a60 | 184 | if (offset < dp->i_d.di_forkoff) |
e5889e90 | 185 | return 0; |
4c393a60 CH |
186 | return dp->i_d.di_forkoff; |
187 | } | |
188 | dsize = XFS_BMAP_BROOT_SPACE(dp->i_df.if_broot); | |
e5889e90 BN |
189 | break; |
190 | } | |
4c393a60 CH |
191 | |
192 | /* | |
193 | * A data fork btree root must have space for at least | |
e5889e90 BN |
194 | * MINDBTPTRS key/ptr pairs if the data fork is small or empty. |
195 | */ | |
196 | minforkoff = MAX(dsize, XFS_BMDR_SPACE_CALC(MINDBTPTRS)); | |
d8cc890d NS |
197 | minforkoff = roundup(minforkoff, 8) >> 3; |
198 | ||
199 | /* attr fork btree root can have at least this many key/ptr pairs */ | |
200 | maxforkoff = XFS_LITINO(mp) - XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
201 | maxforkoff = maxforkoff >> 3; /* rounded down */ | |
202 | ||
d8cc890d NS |
203 | if (offset >= maxforkoff) |
204 | return maxforkoff; | |
4c393a60 CH |
205 | if (offset >= minforkoff) |
206 | return offset; | |
d8cc890d NS |
207 | return 0; |
208 | } | |
209 | ||
210 | /* | |
211 | * Switch on the ATTR2 superblock bit (implies also FEATURES2) | |
212 | */ | |
213 | STATIC void | |
214 | xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp) | |
215 | { | |
13059ff0 | 216 | if ((mp->m_flags & XFS_MOUNT_ATTR2) && |
62118709 | 217 | !(xfs_sb_version_hasattr2(&mp->m_sb))) { |
3685c2a1 | 218 | spin_lock(&mp->m_sb_lock); |
62118709 ES |
219 | if (!xfs_sb_version_hasattr2(&mp->m_sb)) { |
220 | xfs_sb_version_addattr2(&mp->m_sb); | |
3685c2a1 | 221 | spin_unlock(&mp->m_sb_lock); |
d8cc890d NS |
222 | xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); |
223 | } else | |
3685c2a1 | 224 | spin_unlock(&mp->m_sb_lock); |
d8cc890d NS |
225 | } |
226 | } | |
227 | ||
228 | /* | |
229 | * Create the initial contents of a shortform attribute list. | |
230 | */ | |
231 | void | |
1da177e4 LT |
232 | xfs_attr_shortform_create(xfs_da_args_t *args) |
233 | { | |
234 | xfs_attr_sf_hdr_t *hdr; | |
235 | xfs_inode_t *dp; | |
236 | xfs_ifork_t *ifp; | |
237 | ||
5a5881cd DC |
238 | trace_xfs_attr_sf_create(args); |
239 | ||
1da177e4 LT |
240 | dp = args->dp; |
241 | ASSERT(dp != NULL); | |
242 | ifp = dp->i_afp; | |
243 | ASSERT(ifp != NULL); | |
244 | ASSERT(ifp->if_bytes == 0); | |
245 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) { | |
246 | ifp->if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
247 | dp->i_d.di_aformat = XFS_DINODE_FMT_LOCAL; | |
248 | ifp->if_flags |= XFS_IFINLINE; | |
249 | } else { | |
250 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
251 | } | |
252 | xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK); | |
253 | hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data; | |
254 | hdr->count = 0; | |
3b244aa8 | 255 | hdr->totsize = cpu_to_be16(sizeof(*hdr)); |
1da177e4 | 256 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
1da177e4 LT |
257 | } |
258 | ||
259 | /* | |
260 | * Add a name/value pair to the shortform attribute list. | |
261 | * Overflow from the inode has already been checked for. | |
262 | */ | |
d8cc890d NS |
263 | void |
264 | xfs_attr_shortform_add(xfs_da_args_t *args, int forkoff) | |
1da177e4 LT |
265 | { |
266 | xfs_attr_shortform_t *sf; | |
267 | xfs_attr_sf_entry_t *sfe; | |
268 | int i, offset, size; | |
d8cc890d | 269 | xfs_mount_t *mp; |
1da177e4 LT |
270 | xfs_inode_t *dp; |
271 | xfs_ifork_t *ifp; | |
272 | ||
5a5881cd DC |
273 | trace_xfs_attr_sf_add(args); |
274 | ||
1da177e4 | 275 | dp = args->dp; |
d8cc890d NS |
276 | mp = dp->i_mount; |
277 | dp->i_d.di_forkoff = forkoff; | |
d8cc890d | 278 | |
1da177e4 LT |
279 | ifp = dp->i_afp; |
280 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
281 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
282 | sfe = &sf->list[0]; | |
3b244aa8 | 283 | for (i = 0; i < sf->hdr.count; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
d8cc890d | 284 | #ifdef DEBUG |
1da177e4 LT |
285 | if (sfe->namelen != args->namelen) |
286 | continue; | |
287 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
288 | continue; | |
726801ba | 289 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 | 290 | continue; |
d8cc890d NS |
291 | ASSERT(0); |
292 | #endif | |
1da177e4 LT |
293 | } |
294 | ||
295 | offset = (char *)sfe - (char *)sf; | |
296 | size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); | |
297 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); | |
298 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
299 | sfe = (xfs_attr_sf_entry_t *)((char *)sf + offset); | |
300 | ||
301 | sfe->namelen = args->namelen; | |
3b244aa8 | 302 | sfe->valuelen = args->valuelen; |
726801ba | 303 | sfe->flags = XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
1da177e4 LT |
304 | memcpy(sfe->nameval, args->name, args->namelen); |
305 | memcpy(&sfe->nameval[args->namelen], args->value, args->valuelen); | |
3b244aa8 | 306 | sf->hdr.count++; |
413d57c9 | 307 | be16_add_cpu(&sf->hdr.totsize, size); |
1da177e4 LT |
308 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
309 | ||
d8cc890d | 310 | xfs_sbversion_add_attr2(mp, args->trans); |
1da177e4 LT |
311 | } |
312 | ||
e1486dea CH |
313 | /* |
314 | * After the last attribute is removed revert to original inode format, | |
315 | * making all literal area available to the data fork once more. | |
316 | */ | |
317 | STATIC void | |
318 | xfs_attr_fork_reset( | |
319 | struct xfs_inode *ip, | |
320 | struct xfs_trans *tp) | |
321 | { | |
322 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
323 | ip->i_d.di_forkoff = 0; | |
324 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
325 | ||
326 | ASSERT(ip->i_d.di_anextents == 0); | |
327 | ASSERT(ip->i_afp == NULL); | |
328 | ||
e1486dea CH |
329 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
330 | } | |
331 | ||
1da177e4 | 332 | /* |
d8cc890d | 333 | * Remove an attribute from the shortform attribute list structure. |
1da177e4 LT |
334 | */ |
335 | int | |
336 | xfs_attr_shortform_remove(xfs_da_args_t *args) | |
337 | { | |
338 | xfs_attr_shortform_t *sf; | |
339 | xfs_attr_sf_entry_t *sfe; | |
340 | int base, size=0, end, totsize, i; | |
d8cc890d | 341 | xfs_mount_t *mp; |
1da177e4 LT |
342 | xfs_inode_t *dp; |
343 | ||
5a5881cd DC |
344 | trace_xfs_attr_sf_remove(args); |
345 | ||
1da177e4 | 346 | dp = args->dp; |
d8cc890d | 347 | mp = dp->i_mount; |
1da177e4 LT |
348 | base = sizeof(xfs_attr_sf_hdr_t); |
349 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; | |
350 | sfe = &sf->list[0]; | |
3b244aa8 | 351 | end = sf->hdr.count; |
d8cc890d | 352 | for (i = 0; i < end; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), |
1da177e4 LT |
353 | base += size, i++) { |
354 | size = XFS_ATTR_SF_ENTSIZE(sfe); | |
355 | if (sfe->namelen != args->namelen) | |
356 | continue; | |
357 | if (memcmp(sfe->nameval, args->name, args->namelen) != 0) | |
358 | continue; | |
726801ba | 359 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
360 | continue; |
361 | break; | |
362 | } | |
d8cc890d | 363 | if (i == end) |
1da177e4 LT |
364 | return(XFS_ERROR(ENOATTR)); |
365 | ||
d8cc890d NS |
366 | /* |
367 | * Fix up the attribute fork data, covering the hole | |
368 | */ | |
1da177e4 | 369 | end = base + size; |
3b244aa8 | 370 | totsize = be16_to_cpu(sf->hdr.totsize); |
d8cc890d NS |
371 | if (end != totsize) |
372 | memmove(&((char *)sf)[base], &((char *)sf)[end], totsize - end); | |
3b244aa8 | 373 | sf->hdr.count--; |
413d57c9 | 374 | be16_add_cpu(&sf->hdr.totsize, -size); |
d8cc890d NS |
375 | |
376 | /* | |
377 | * Fix up the start offset of the attribute fork | |
378 | */ | |
379 | totsize -= size; | |
6a178100 | 380 | if (totsize == sizeof(xfs_attr_sf_hdr_t) && |
e1486dea CH |
381 | (mp->m_flags & XFS_MOUNT_ATTR2) && |
382 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
383 | !(args->op_flags & XFS_DA_OP_ADDNAME)) { | |
384 | xfs_attr_fork_reset(dp, args->trans); | |
d8cc890d NS |
385 | } else { |
386 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
387 | dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize); | |
388 | ASSERT(dp->i_d.di_forkoff); | |
6a178100 BN |
389 | ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) || |
390 | (args->op_flags & XFS_DA_OP_ADDNAME) || | |
391 | !(mp->m_flags & XFS_MOUNT_ATTR2) || | |
392 | dp->i_d.di_format == XFS_DINODE_FMT_BTREE); | |
d8cc890d NS |
393 | xfs_trans_log_inode(args->trans, dp, |
394 | XFS_ILOG_CORE | XFS_ILOG_ADATA); | |
395 | } | |
396 | ||
397 | xfs_sbversion_add_attr2(mp, args->trans); | |
1da177e4 LT |
398 | |
399 | return(0); | |
400 | } | |
401 | ||
402 | /* | |
403 | * Look up a name in a shortform attribute list structure. | |
404 | */ | |
405 | /*ARGSUSED*/ | |
406 | int | |
407 | xfs_attr_shortform_lookup(xfs_da_args_t *args) | |
408 | { | |
409 | xfs_attr_shortform_t *sf; | |
410 | xfs_attr_sf_entry_t *sfe; | |
411 | int i; | |
412 | xfs_ifork_t *ifp; | |
413 | ||
5a5881cd DC |
414 | trace_xfs_attr_sf_lookup(args); |
415 | ||
1da177e4 LT |
416 | ifp = args->dp->i_afp; |
417 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
418 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
419 | sfe = &sf->list[0]; | |
3b244aa8 | 420 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
421 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
422 | if (sfe->namelen != args->namelen) | |
423 | continue; | |
424 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
425 | continue; | |
726801ba | 426 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
427 | continue; |
428 | return(XFS_ERROR(EEXIST)); | |
429 | } | |
430 | return(XFS_ERROR(ENOATTR)); | |
431 | } | |
432 | ||
433 | /* | |
434 | * Look up a name in a shortform attribute list structure. | |
435 | */ | |
436 | /*ARGSUSED*/ | |
437 | int | |
438 | xfs_attr_shortform_getvalue(xfs_da_args_t *args) | |
439 | { | |
440 | xfs_attr_shortform_t *sf; | |
441 | xfs_attr_sf_entry_t *sfe; | |
442 | int i; | |
443 | ||
444 | ASSERT(args->dp->i_d.di_aformat == XFS_IFINLINE); | |
445 | sf = (xfs_attr_shortform_t *)args->dp->i_afp->if_u1.if_data; | |
446 | sfe = &sf->list[0]; | |
3b244aa8 | 447 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
448 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
449 | if (sfe->namelen != args->namelen) | |
450 | continue; | |
451 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
452 | continue; | |
726801ba | 453 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
454 | continue; |
455 | if (args->flags & ATTR_KERNOVAL) { | |
3b244aa8 | 456 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
457 | return(XFS_ERROR(EEXIST)); |
458 | } | |
3b244aa8 NS |
459 | if (args->valuelen < sfe->valuelen) { |
460 | args->valuelen = sfe->valuelen; | |
1da177e4 LT |
461 | return(XFS_ERROR(ERANGE)); |
462 | } | |
3b244aa8 | 463 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
464 | memcpy(args->value, &sfe->nameval[args->namelen], |
465 | args->valuelen); | |
466 | return(XFS_ERROR(EEXIST)); | |
467 | } | |
468 | return(XFS_ERROR(ENOATTR)); | |
469 | } | |
470 | ||
471 | /* | |
472 | * Convert from using the shortform to the leaf. | |
473 | */ | |
474 | int | |
475 | xfs_attr_shortform_to_leaf(xfs_da_args_t *args) | |
476 | { | |
477 | xfs_inode_t *dp; | |
478 | xfs_attr_shortform_t *sf; | |
479 | xfs_attr_sf_entry_t *sfe; | |
480 | xfs_da_args_t nargs; | |
481 | char *tmpbuffer; | |
482 | int error, i, size; | |
483 | xfs_dablk_t blkno; | |
484 | xfs_dabuf_t *bp; | |
485 | xfs_ifork_t *ifp; | |
486 | ||
5a5881cd DC |
487 | trace_xfs_attr_sf_to_leaf(args); |
488 | ||
1da177e4 LT |
489 | dp = args->dp; |
490 | ifp = dp->i_afp; | |
491 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
3b244aa8 | 492 | size = be16_to_cpu(sf->hdr.totsize); |
1da177e4 LT |
493 | tmpbuffer = kmem_alloc(size, KM_SLEEP); |
494 | ASSERT(tmpbuffer != NULL); | |
495 | memcpy(tmpbuffer, ifp->if_u1.if_data, size); | |
496 | sf = (xfs_attr_shortform_t *)tmpbuffer; | |
497 | ||
498 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
499 | bp = NULL; | |
500 | error = xfs_da_grow_inode(args, &blkno); | |
501 | if (error) { | |
502 | /* | |
503 | * If we hit an IO error middle of the transaction inside | |
504 | * grow_inode(), we may have inconsistent data. Bail out. | |
505 | */ | |
506 | if (error == EIO) | |
507 | goto out; | |
508 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
509 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
510 | goto out; | |
511 | } | |
512 | ||
513 | ASSERT(blkno == 0); | |
514 | error = xfs_attr_leaf_create(args, blkno, &bp); | |
515 | if (error) { | |
516 | error = xfs_da_shrink_inode(args, 0, bp); | |
517 | bp = NULL; | |
518 | if (error) | |
519 | goto out; | |
520 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
521 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
522 | goto out; | |
523 | } | |
524 | ||
525 | memset((char *)&nargs, 0, sizeof(nargs)); | |
526 | nargs.dp = dp; | |
527 | nargs.firstblock = args->firstblock; | |
528 | nargs.flist = args->flist; | |
529 | nargs.total = args->total; | |
530 | nargs.whichfork = XFS_ATTR_FORK; | |
531 | nargs.trans = args->trans; | |
6a178100 | 532 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
1da177e4 LT |
533 | |
534 | sfe = &sf->list[0]; | |
3b244aa8 | 535 | for (i = 0; i < sf->hdr.count; i++) { |
a9273ca5 | 536 | nargs.name = sfe->nameval; |
1da177e4 | 537 | nargs.namelen = sfe->namelen; |
a9273ca5 | 538 | nargs.value = &sfe->nameval[nargs.namelen]; |
3b244aa8 | 539 | nargs.valuelen = sfe->valuelen; |
a9273ca5 | 540 | nargs.hashval = xfs_da_hashname(sfe->nameval, |
1da177e4 | 541 | sfe->namelen); |
726801ba | 542 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags); |
1da177e4 LT |
543 | error = xfs_attr_leaf_lookup_int(bp, &nargs); /* set a->index */ |
544 | ASSERT(error == ENOATTR); | |
545 | error = xfs_attr_leaf_add(bp, &nargs); | |
546 | ASSERT(error != ENOSPC); | |
547 | if (error) | |
548 | goto out; | |
549 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
550 | } | |
551 | error = 0; | |
552 | ||
553 | out: | |
554 | if(bp) | |
555 | xfs_da_buf_done(bp); | |
f0e2d93c | 556 | kmem_free(tmpbuffer); |
1da177e4 LT |
557 | return(error); |
558 | } | |
559 | ||
560 | STATIC int | |
561 | xfs_attr_shortform_compare(const void *a, const void *b) | |
562 | { | |
563 | xfs_attr_sf_sort_t *sa, *sb; | |
564 | ||
565 | sa = (xfs_attr_sf_sort_t *)a; | |
566 | sb = (xfs_attr_sf_sort_t *)b; | |
984a081a | 567 | if (sa->hash < sb->hash) { |
1da177e4 | 568 | return(-1); |
984a081a | 569 | } else if (sa->hash > sb->hash) { |
1da177e4 LT |
570 | return(1); |
571 | } else { | |
572 | return(sa->entno - sb->entno); | |
573 | } | |
574 | } | |
575 | ||
726801ba TS |
576 | |
577 | #define XFS_ISRESET_CURSOR(cursor) \ | |
578 | (!((cursor)->initted) && !((cursor)->hashval) && \ | |
579 | !((cursor)->blkno) && !((cursor)->offset)) | |
1da177e4 LT |
580 | /* |
581 | * Copy out entries of shortform attribute lists for attr_list(). | |
c41564b5 | 582 | * Shortform attribute lists are not stored in hashval sorted order. |
1da177e4 LT |
583 | * If the output buffer is not large enough to hold them all, then we |
584 | * we have to calculate each entries' hashvalue and sort them before | |
585 | * we can begin returning them to the user. | |
586 | */ | |
587 | /*ARGSUSED*/ | |
588 | int | |
589 | xfs_attr_shortform_list(xfs_attr_list_context_t *context) | |
590 | { | |
591 | attrlist_cursor_kern_t *cursor; | |
592 | xfs_attr_sf_sort_t *sbuf, *sbp; | |
593 | xfs_attr_shortform_t *sf; | |
594 | xfs_attr_sf_entry_t *sfe; | |
595 | xfs_inode_t *dp; | |
596 | int sbsize, nsbuf, count, i; | |
726801ba | 597 | int error; |
1da177e4 LT |
598 | |
599 | ASSERT(context != NULL); | |
600 | dp = context->dp; | |
601 | ASSERT(dp != NULL); | |
602 | ASSERT(dp->i_afp != NULL); | |
603 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; | |
604 | ASSERT(sf != NULL); | |
605 | if (!sf->hdr.count) | |
606 | return(0); | |
607 | cursor = context->cursor; | |
608 | ASSERT(cursor != NULL); | |
609 | ||
0b1b213f | 610 | trace_xfs_attr_list_sf(context); |
1da177e4 LT |
611 | |
612 | /* | |
726801ba TS |
613 | * If the buffer is large enough and the cursor is at the start, |
614 | * do not bother with sorting since we will return everything in | |
615 | * one buffer and another call using the cursor won't need to be | |
616 | * made. | |
1da177e4 | 617 | * Note the generous fudge factor of 16 overhead bytes per entry. |
726801ba TS |
618 | * If bufsize is zero then put_listent must be a search function |
619 | * and can just scan through what we have. | |
1da177e4 | 620 | */ |
726801ba TS |
621 | if (context->bufsize == 0 || |
622 | (XFS_ISRESET_CURSOR(cursor) && | |
623 | (dp->i_afp->if_bytes + sf->hdr.count * 16) < context->bufsize)) { | |
3b244aa8 | 624 | for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) { |
726801ba | 625 | error = context->put_listent(context, |
ad9b463a | 626 | sfe->flags, |
a9273ca5 | 627 | sfe->nameval, |
726801ba TS |
628 | (int)sfe->namelen, |
629 | (int)sfe->valuelen, | |
a9273ca5 | 630 | &sfe->nameval[sfe->namelen]); |
726801ba TS |
631 | |
632 | /* | |
633 | * Either search callback finished early or | |
634 | * didn't fit it all in the buffer after all. | |
635 | */ | |
636 | if (context->seen_enough) | |
637 | break; | |
638 | ||
639 | if (error) | |
640 | return error; | |
1da177e4 LT |
641 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); |
642 | } | |
0b1b213f | 643 | trace_xfs_attr_list_sf_all(context); |
1da177e4 LT |
644 | return(0); |
645 | } | |
646 | ||
726801ba TS |
647 | /* do no more for a search callback */ |
648 | if (context->bufsize == 0) | |
649 | return 0; | |
650 | ||
1da177e4 LT |
651 | /* |
652 | * It didn't all fit, so we have to sort everything on hashval. | |
653 | */ | |
3b244aa8 | 654 | sbsize = sf->hdr.count * sizeof(*sbuf); |
622d8149 | 655 | sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS); |
1da177e4 LT |
656 | |
657 | /* | |
658 | * Scan the attribute list for the rest of the entries, storing | |
659 | * the relevant info from only those that match into a buffer. | |
660 | */ | |
661 | nsbuf = 0; | |
3b244aa8 | 662 | for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) { |
1da177e4 LT |
663 | if (unlikely( |
664 | ((char *)sfe < (char *)sf) || | |
665 | ((char *)sfe >= ((char *)sf + dp->i_afp->if_bytes)))) { | |
666 | XFS_CORRUPTION_ERROR("xfs_attr_shortform_list", | |
667 | XFS_ERRLEVEL_LOW, | |
668 | context->dp->i_mount, sfe); | |
f0e2d93c | 669 | kmem_free(sbuf); |
1da177e4 LT |
670 | return XFS_ERROR(EFSCORRUPTED); |
671 | } | |
ad9b463a | 672 | |
1da177e4 | 673 | sbp->entno = i; |
a9273ca5 DC |
674 | sbp->hash = xfs_da_hashname(sfe->nameval, sfe->namelen); |
675 | sbp->name = sfe->nameval; | |
1da177e4 LT |
676 | sbp->namelen = sfe->namelen; |
677 | /* These are bytes, and both on-disk, don't endian-flip */ | |
678 | sbp->valuelen = sfe->valuelen; | |
679 | sbp->flags = sfe->flags; | |
680 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
681 | sbp++; | |
682 | nsbuf++; | |
683 | } | |
684 | ||
685 | /* | |
686 | * Sort the entries on hash then entno. | |
687 | */ | |
380b5dc0 | 688 | xfs_sort(sbuf, nsbuf, sizeof(*sbuf), xfs_attr_shortform_compare); |
1da177e4 LT |
689 | |
690 | /* | |
691 | * Re-find our place IN THE SORTED LIST. | |
692 | */ | |
693 | count = 0; | |
694 | cursor->initted = 1; | |
695 | cursor->blkno = 0; | |
696 | for (sbp = sbuf, i = 0; i < nsbuf; i++, sbp++) { | |
984a081a | 697 | if (sbp->hash == cursor->hashval) { |
1da177e4 LT |
698 | if (cursor->offset == count) { |
699 | break; | |
700 | } | |
701 | count++; | |
984a081a | 702 | } else if (sbp->hash > cursor->hashval) { |
1da177e4 LT |
703 | break; |
704 | } | |
705 | } | |
706 | if (i == nsbuf) { | |
f0e2d93c | 707 | kmem_free(sbuf); |
1da177e4 LT |
708 | return(0); |
709 | } | |
710 | ||
711 | /* | |
712 | * Loop putting entries into the user buffer. | |
713 | */ | |
714 | for ( ; i < nsbuf; i++, sbp++) { | |
984a081a NS |
715 | if (cursor->hashval != sbp->hash) { |
716 | cursor->hashval = sbp->hash; | |
1da177e4 LT |
717 | cursor->offset = 0; |
718 | } | |
726801ba | 719 | error = context->put_listent(context, |
ad9b463a | 720 | sbp->flags, |
726801ba TS |
721 | sbp->name, |
722 | sbp->namelen, | |
723 | sbp->valuelen, | |
724 | &sbp->name[sbp->namelen]); | |
725 | if (error) | |
726 | return error; | |
727 | if (context->seen_enough) | |
728 | break; | |
1da177e4 LT |
729 | cursor->offset++; |
730 | } | |
731 | ||
f0e2d93c | 732 | kmem_free(sbuf); |
1da177e4 LT |
733 | return(0); |
734 | } | |
735 | ||
736 | /* | |
737 | * Check a leaf attribute block to see if all the entries would fit into | |
738 | * a shortform attribute list. | |
739 | */ | |
740 | int | |
741 | xfs_attr_shortform_allfit(xfs_dabuf_t *bp, xfs_inode_t *dp) | |
742 | { | |
743 | xfs_attr_leafblock_t *leaf; | |
744 | xfs_attr_leaf_entry_t *entry; | |
745 | xfs_attr_leaf_name_local_t *name_loc; | |
746 | int bytes, i; | |
747 | ||
748 | leaf = bp->data; | |
69ef921b | 749 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 LT |
750 | |
751 | entry = &leaf->entries[0]; | |
752 | bytes = sizeof(struct xfs_attr_sf_hdr); | |
918ae424 | 753 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
1da177e4 LT |
754 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
755 | continue; /* don't copy partial entries */ | |
756 | if (!(entry->flags & XFS_ATTR_LOCAL)) | |
757 | return(0); | |
c9fb86a9 | 758 | name_loc = xfs_attr_leaf_name_local(leaf, i); |
1da177e4 LT |
759 | if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
760 | return(0); | |
053b5758 | 761 | if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX) |
1da177e4 LT |
762 | return(0); |
763 | bytes += sizeof(struct xfs_attr_sf_entry)-1 | |
764 | + name_loc->namelen | |
053b5758 | 765 | + be16_to_cpu(name_loc->valuelen); |
1da177e4 | 766 | } |
13059ff0 | 767 | if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) && |
e5889e90 | 768 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
e0144ca5 | 769 | (bytes == sizeof(struct xfs_attr_sf_hdr))) |
d8cc890d NS |
770 | return(-1); |
771 | return(xfs_attr_shortform_bytesfit(dp, bytes)); | |
1da177e4 LT |
772 | } |
773 | ||
774 | /* | |
775 | * Convert a leaf attribute list to shortform attribute list | |
776 | */ | |
777 | int | |
d8cc890d | 778 | xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff) |
1da177e4 LT |
779 | { |
780 | xfs_attr_leafblock_t *leaf; | |
781 | xfs_attr_leaf_entry_t *entry; | |
782 | xfs_attr_leaf_name_local_t *name_loc; | |
783 | xfs_da_args_t nargs; | |
784 | xfs_inode_t *dp; | |
785 | char *tmpbuffer; | |
786 | int error, i; | |
787 | ||
5a5881cd DC |
788 | trace_xfs_attr_leaf_to_sf(args); |
789 | ||
1da177e4 LT |
790 | dp = args->dp; |
791 | tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP); | |
792 | ASSERT(tmpbuffer != NULL); | |
793 | ||
794 | ASSERT(bp != NULL); | |
795 | memcpy(tmpbuffer, bp->data, XFS_LBSIZE(dp->i_mount)); | |
796 | leaf = (xfs_attr_leafblock_t *)tmpbuffer; | |
69ef921b | 797 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 LT |
798 | memset(bp->data, 0, XFS_LBSIZE(dp->i_mount)); |
799 | ||
800 | /* | |
801 | * Clean out the prior contents of the attribute list. | |
802 | */ | |
803 | error = xfs_da_shrink_inode(args, 0, bp); | |
804 | if (error) | |
805 | goto out; | |
d8cc890d NS |
806 | |
807 | if (forkoff == -1) { | |
13059ff0 | 808 | ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2); |
e5889e90 | 809 | ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE); |
e1486dea | 810 | xfs_attr_fork_reset(dp, args->trans); |
1da177e4 | 811 | goto out; |
d8cc890d NS |
812 | } |
813 | ||
814 | xfs_attr_shortform_create(args); | |
1da177e4 LT |
815 | |
816 | /* | |
817 | * Copy the attributes | |
818 | */ | |
819 | memset((char *)&nargs, 0, sizeof(nargs)); | |
820 | nargs.dp = dp; | |
821 | nargs.firstblock = args->firstblock; | |
822 | nargs.flist = args->flist; | |
823 | nargs.total = args->total; | |
824 | nargs.whichfork = XFS_ATTR_FORK; | |
825 | nargs.trans = args->trans; | |
6a178100 | 826 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
1da177e4 | 827 | entry = &leaf->entries[0]; |
918ae424 | 828 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
1da177e4 LT |
829 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
830 | continue; /* don't copy partial entries */ | |
831 | if (!entry->nameidx) | |
832 | continue; | |
833 | ASSERT(entry->flags & XFS_ATTR_LOCAL); | |
c9fb86a9 | 834 | name_loc = xfs_attr_leaf_name_local(leaf, i); |
a9273ca5 | 835 | nargs.name = name_loc->nameval; |
1da177e4 | 836 | nargs.namelen = name_loc->namelen; |
a9273ca5 | 837 | nargs.value = &name_loc->nameval[nargs.namelen]; |
053b5758 | 838 | nargs.valuelen = be16_to_cpu(name_loc->valuelen); |
6b19f2d8 | 839 | nargs.hashval = be32_to_cpu(entry->hashval); |
726801ba | 840 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(entry->flags); |
d8cc890d | 841 | xfs_attr_shortform_add(&nargs, forkoff); |
1da177e4 LT |
842 | } |
843 | error = 0; | |
844 | ||
845 | out: | |
f0e2d93c | 846 | kmem_free(tmpbuffer); |
1da177e4 LT |
847 | return(error); |
848 | } | |
849 | ||
850 | /* | |
851 | * Convert from using a single leaf to a root node and a leaf. | |
852 | */ | |
853 | int | |
854 | xfs_attr_leaf_to_node(xfs_da_args_t *args) | |
855 | { | |
856 | xfs_attr_leafblock_t *leaf; | |
857 | xfs_da_intnode_t *node; | |
858 | xfs_inode_t *dp; | |
859 | xfs_dabuf_t *bp1, *bp2; | |
860 | xfs_dablk_t blkno; | |
861 | int error; | |
862 | ||
5a5881cd DC |
863 | trace_xfs_attr_leaf_to_node(args); |
864 | ||
1da177e4 LT |
865 | dp = args->dp; |
866 | bp1 = bp2 = NULL; | |
867 | error = xfs_da_grow_inode(args, &blkno); | |
868 | if (error) | |
869 | goto out; | |
870 | error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp1, | |
871 | XFS_ATTR_FORK); | |
872 | if (error) | |
873 | goto out; | |
874 | ASSERT(bp1 != NULL); | |
875 | bp2 = NULL; | |
876 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp2, | |
877 | XFS_ATTR_FORK); | |
878 | if (error) | |
879 | goto out; | |
880 | ASSERT(bp2 != NULL); | |
881 | memcpy(bp2->data, bp1->data, XFS_LBSIZE(dp->i_mount)); | |
882 | xfs_da_buf_done(bp1); | |
883 | bp1 = NULL; | |
884 | xfs_da_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1); | |
885 | ||
886 | /* | |
887 | * Set up the new root node. | |
888 | */ | |
889 | error = xfs_da_node_create(args, 0, 1, &bp1, XFS_ATTR_FORK); | |
890 | if (error) | |
891 | goto out; | |
892 | node = bp1->data; | |
893 | leaf = bp2->data; | |
69ef921b | 894 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 LT |
895 | /* both on-disk, don't endian-flip twice */ |
896 | node->btree[0].hashval = | |
918ae424 | 897 | leaf->entries[be16_to_cpu(leaf->hdr.count)-1 ].hashval; |
403432dc | 898 | node->btree[0].before = cpu_to_be32(blkno); |
fac80cce | 899 | node->hdr.count = cpu_to_be16(1); |
1da177e4 LT |
900 | xfs_da_log_buf(args->trans, bp1, 0, XFS_LBSIZE(dp->i_mount) - 1); |
901 | error = 0; | |
902 | out: | |
903 | if (bp1) | |
904 | xfs_da_buf_done(bp1); | |
905 | if (bp2) | |
906 | xfs_da_buf_done(bp2); | |
907 | return(error); | |
908 | } | |
909 | ||
910 | ||
911 | /*======================================================================== | |
912 | * Routines used for growing the Btree. | |
913 | *========================================================================*/ | |
914 | ||
915 | /* | |
916 | * Create the initial contents of a leaf attribute list | |
917 | * or a leaf in a node attribute list. | |
918 | */ | |
ba0f32d4 | 919 | STATIC int |
1da177e4 LT |
920 | xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t blkno, xfs_dabuf_t **bpp) |
921 | { | |
922 | xfs_attr_leafblock_t *leaf; | |
923 | xfs_attr_leaf_hdr_t *hdr; | |
924 | xfs_inode_t *dp; | |
925 | xfs_dabuf_t *bp; | |
926 | int error; | |
927 | ||
5a5881cd DC |
928 | trace_xfs_attr_leaf_create(args); |
929 | ||
1da177e4 LT |
930 | dp = args->dp; |
931 | ASSERT(dp != NULL); | |
932 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp, | |
933 | XFS_ATTR_FORK); | |
934 | if (error) | |
935 | return(error); | |
936 | ASSERT(bp != NULL); | |
937 | leaf = bp->data; | |
938 | memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount)); | |
939 | hdr = &leaf->hdr; | |
89da0544 | 940 | hdr->info.magic = cpu_to_be16(XFS_ATTR_LEAF_MAGIC); |
918ae424 | 941 | hdr->firstused = cpu_to_be16(XFS_LBSIZE(dp->i_mount)); |
1da177e4 | 942 | if (!hdr->firstused) { |
918ae424 | 943 | hdr->firstused = cpu_to_be16( |
1da177e4 LT |
944 | XFS_LBSIZE(dp->i_mount) - XFS_ATTR_LEAF_NAME_ALIGN); |
945 | } | |
946 | ||
918ae424 NS |
947 | hdr->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t)); |
948 | hdr->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr->firstused) - | |
949 | sizeof(xfs_attr_leaf_hdr_t)); | |
1da177e4 LT |
950 | |
951 | xfs_da_log_buf(args->trans, bp, 0, XFS_LBSIZE(dp->i_mount) - 1); | |
952 | ||
953 | *bpp = bp; | |
954 | return(0); | |
955 | } | |
956 | ||
957 | /* | |
958 | * Split the leaf node, rebalance, then add the new entry. | |
959 | */ | |
960 | int | |
961 | xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk, | |
962 | xfs_da_state_blk_t *newblk) | |
963 | { | |
964 | xfs_dablk_t blkno; | |
965 | int error; | |
966 | ||
5a5881cd DC |
967 | trace_xfs_attr_leaf_split(state->args); |
968 | ||
1da177e4 LT |
969 | /* |
970 | * Allocate space for a new leaf node. | |
971 | */ | |
972 | ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC); | |
973 | error = xfs_da_grow_inode(state->args, &blkno); | |
974 | if (error) | |
975 | return(error); | |
976 | error = xfs_attr_leaf_create(state->args, blkno, &newblk->bp); | |
977 | if (error) | |
978 | return(error); | |
979 | newblk->blkno = blkno; | |
980 | newblk->magic = XFS_ATTR_LEAF_MAGIC; | |
981 | ||
982 | /* | |
983 | * Rebalance the entries across the two leaves. | |
984 | * NOTE: rebalance() currently depends on the 2nd block being empty. | |
985 | */ | |
986 | xfs_attr_leaf_rebalance(state, oldblk, newblk); | |
987 | error = xfs_da_blk_link(state, oldblk, newblk); | |
988 | if (error) | |
989 | return(error); | |
990 | ||
991 | /* | |
992 | * Save info on "old" attribute for "atomic rename" ops, leaf_add() | |
993 | * modifies the index/blkno/rmtblk/rmtblkcnt fields to show the | |
994 | * "new" attrs info. Will need the "old" info to remove it later. | |
995 | * | |
996 | * Insert the "new" entry in the correct block. | |
997 | */ | |
5a5881cd DC |
998 | if (state->inleaf) { |
999 | trace_xfs_attr_leaf_add_old(state->args); | |
1da177e4 | 1000 | error = xfs_attr_leaf_add(oldblk->bp, state->args); |
5a5881cd DC |
1001 | } else { |
1002 | trace_xfs_attr_leaf_add_new(state->args); | |
1da177e4 | 1003 | error = xfs_attr_leaf_add(newblk->bp, state->args); |
5a5881cd | 1004 | } |
1da177e4 LT |
1005 | |
1006 | /* | |
1007 | * Update last hashval in each block since we added the name. | |
1008 | */ | |
1009 | oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL); | |
1010 | newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL); | |
1011 | return(error); | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Add a name to the leaf attribute list structure. | |
1016 | */ | |
1017 | int | |
1018 | xfs_attr_leaf_add(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
1019 | { | |
1020 | xfs_attr_leafblock_t *leaf; | |
1021 | xfs_attr_leaf_hdr_t *hdr; | |
1022 | xfs_attr_leaf_map_t *map; | |
1023 | int tablesize, entsize, sum, tmp, i; | |
1024 | ||
5a5881cd DC |
1025 | trace_xfs_attr_leaf_add(args); |
1026 | ||
1da177e4 | 1027 | leaf = bp->data; |
69ef921b | 1028 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 | 1029 | ASSERT((args->index >= 0) |
918ae424 | 1030 | && (args->index <= be16_to_cpu(leaf->hdr.count))); |
1da177e4 | 1031 | hdr = &leaf->hdr; |
aa82daa0 | 1032 | entsize = xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1da177e4 LT |
1033 | args->trans->t_mountp->m_sb.sb_blocksize, NULL); |
1034 | ||
1035 | /* | |
1036 | * Search through freemap for first-fit on new name length. | |
1037 | * (may need to figure in size of entry struct too) | |
1038 | */ | |
918ae424 | 1039 | tablesize = (be16_to_cpu(hdr->count) + 1) |
1da177e4 LT |
1040 | * sizeof(xfs_attr_leaf_entry_t) |
1041 | + sizeof(xfs_attr_leaf_hdr_t); | |
1042 | map = &hdr->freemap[XFS_ATTR_LEAF_MAPSIZE-1]; | |
1043 | for (sum = 0, i = XFS_ATTR_LEAF_MAPSIZE-1; i >= 0; map--, i--) { | |
918ae424 NS |
1044 | if (tablesize > be16_to_cpu(hdr->firstused)) { |
1045 | sum += be16_to_cpu(map->size); | |
1da177e4 LT |
1046 | continue; |
1047 | } | |
1048 | if (!map->size) | |
1049 | continue; /* no space in this map */ | |
1050 | tmp = entsize; | |
918ae424 | 1051 | if (be16_to_cpu(map->base) < be16_to_cpu(hdr->firstused)) |
1da177e4 | 1052 | tmp += sizeof(xfs_attr_leaf_entry_t); |
918ae424 | 1053 | if (be16_to_cpu(map->size) >= tmp) { |
1da177e4 LT |
1054 | tmp = xfs_attr_leaf_add_work(bp, args, i); |
1055 | return(tmp); | |
1056 | } | |
918ae424 | 1057 | sum += be16_to_cpu(map->size); |
1da177e4 LT |
1058 | } |
1059 | ||
1060 | /* | |
1061 | * If there are no holes in the address space of the block, | |
1062 | * and we don't have enough freespace, then compaction will do us | |
1063 | * no good and we should just give up. | |
1064 | */ | |
1065 | if (!hdr->holes && (sum < entsize)) | |
1066 | return(XFS_ERROR(ENOSPC)); | |
1067 | ||
1068 | /* | |
1069 | * Compact the entries to coalesce free space. | |
1070 | * This may change the hdr->count via dropping INCOMPLETE entries. | |
1071 | */ | |
1072 | xfs_attr_leaf_compact(args->trans, bp); | |
1073 | ||
1074 | /* | |
1075 | * After compaction, the block is guaranteed to have only one | |
1076 | * free region, in freemap[0]. If it is not big enough, give up. | |
1077 | */ | |
918ae424 | 1078 | if (be16_to_cpu(hdr->freemap[0].size) |
1da177e4 LT |
1079 | < (entsize + sizeof(xfs_attr_leaf_entry_t))) |
1080 | return(XFS_ERROR(ENOSPC)); | |
1081 | ||
1082 | return(xfs_attr_leaf_add_work(bp, args, 0)); | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Add a name to a leaf attribute list structure. | |
1087 | */ | |
1088 | STATIC int | |
1089 | xfs_attr_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int mapindex) | |
1090 | { | |
1091 | xfs_attr_leafblock_t *leaf; | |
1092 | xfs_attr_leaf_hdr_t *hdr; | |
1093 | xfs_attr_leaf_entry_t *entry; | |
1094 | xfs_attr_leaf_name_local_t *name_loc; | |
1095 | xfs_attr_leaf_name_remote_t *name_rmt; | |
1096 | xfs_attr_leaf_map_t *map; | |
1097 | xfs_mount_t *mp; | |
1098 | int tmp, i; | |
1099 | ||
1100 | leaf = bp->data; | |
69ef921b | 1101 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 LT |
1102 | hdr = &leaf->hdr; |
1103 | ASSERT((mapindex >= 0) && (mapindex < XFS_ATTR_LEAF_MAPSIZE)); | |
918ae424 | 1104 | ASSERT((args->index >= 0) && (args->index <= be16_to_cpu(hdr->count))); |
1da177e4 LT |
1105 | |
1106 | /* | |
1107 | * Force open some space in the entry array and fill it in. | |
1108 | */ | |
1109 | entry = &leaf->entries[args->index]; | |
918ae424 NS |
1110 | if (args->index < be16_to_cpu(hdr->count)) { |
1111 | tmp = be16_to_cpu(hdr->count) - args->index; | |
1da177e4 LT |
1112 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
1113 | memmove((char *)(entry+1), (char *)entry, tmp); | |
1114 | xfs_da_log_buf(args->trans, bp, | |
1115 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); | |
1116 | } | |
413d57c9 | 1117 | be16_add_cpu(&hdr->count, 1); |
1da177e4 LT |
1118 | |
1119 | /* | |
1120 | * Allocate space for the new string (at the end of the run). | |
1121 | */ | |
1122 | map = &hdr->freemap[mapindex]; | |
1123 | mp = args->trans->t_mountp; | |
918ae424 NS |
1124 | ASSERT(be16_to_cpu(map->base) < XFS_LBSIZE(mp)); |
1125 | ASSERT((be16_to_cpu(map->base) & 0x3) == 0); | |
1126 | ASSERT(be16_to_cpu(map->size) >= | |
aa82daa0 NS |
1127 | xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1128 | mp->m_sb.sb_blocksize, NULL)); | |
918ae424 NS |
1129 | ASSERT(be16_to_cpu(map->size) < XFS_LBSIZE(mp)); |
1130 | ASSERT((be16_to_cpu(map->size) & 0x3) == 0); | |
413d57c9 | 1131 | be16_add_cpu(&map->size, |
aa82daa0 NS |
1132 | -xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1133 | mp->m_sb.sb_blocksize, &tmp)); | |
6b19f2d8 NS |
1134 | entry->nameidx = cpu_to_be16(be16_to_cpu(map->base) + |
1135 | be16_to_cpu(map->size)); | |
1136 | entry->hashval = cpu_to_be32(args->hashval); | |
1da177e4 | 1137 | entry->flags = tmp ? XFS_ATTR_LOCAL : 0; |
726801ba | 1138 | entry->flags |= XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
6a178100 | 1139 | if (args->op_flags & XFS_DA_OP_RENAME) { |
1da177e4 LT |
1140 | entry->flags |= XFS_ATTR_INCOMPLETE; |
1141 | if ((args->blkno2 == args->blkno) && | |
1142 | (args->index2 <= args->index)) { | |
1143 | args->index2++; | |
1144 | } | |
1145 | } | |
1146 | xfs_da_log_buf(args->trans, bp, | |
1147 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); | |
6b19f2d8 NS |
1148 | ASSERT((args->index == 0) || |
1149 | (be32_to_cpu(entry->hashval) >= be32_to_cpu((entry-1)->hashval))); | |
918ae424 | 1150 | ASSERT((args->index == be16_to_cpu(hdr->count)-1) || |
6b19f2d8 | 1151 | (be32_to_cpu(entry->hashval) <= be32_to_cpu((entry+1)->hashval))); |
1da177e4 LT |
1152 | |
1153 | /* | |
1da177e4 LT |
1154 | * For "remote" attribute values, simply note that we need to |
1155 | * allocate space for the "remote" value. We can't actually | |
1156 | * allocate the extents in this transaction, and we can't decide | |
1157 | * which blocks they should be as we might allocate more blocks | |
1158 | * as part of this transaction (a split operation for example). | |
1159 | */ | |
1160 | if (entry->flags & XFS_ATTR_LOCAL) { | |
c9fb86a9 | 1161 | name_loc = xfs_attr_leaf_name_local(leaf, args->index); |
1da177e4 | 1162 | name_loc->namelen = args->namelen; |
053b5758 | 1163 | name_loc->valuelen = cpu_to_be16(args->valuelen); |
1da177e4 LT |
1164 | memcpy((char *)name_loc->nameval, args->name, args->namelen); |
1165 | memcpy((char *)&name_loc->nameval[args->namelen], args->value, | |
053b5758 | 1166 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 | 1167 | } else { |
c9fb86a9 | 1168 | name_rmt = xfs_attr_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
1169 | name_rmt->namelen = args->namelen; |
1170 | memcpy((char *)name_rmt->name, args->name, args->namelen); | |
1171 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
1172 | /* just in case */ | |
1173 | name_rmt->valuelen = 0; | |
1174 | name_rmt->valueblk = 0; | |
1175 | args->rmtblkno = 1; | |
1176 | args->rmtblkcnt = XFS_B_TO_FSB(mp, args->valuelen); | |
1177 | } | |
1178 | xfs_da_log_buf(args->trans, bp, | |
c9fb86a9 | 1179 | XFS_DA_LOGRANGE(leaf, xfs_attr_leaf_name(leaf, args->index), |
1da177e4 LT |
1180 | xfs_attr_leaf_entsize(leaf, args->index))); |
1181 | ||
1182 | /* | |
1183 | * Update the control info for this leaf node | |
1184 | */ | |
6b19f2d8 | 1185 | if (be16_to_cpu(entry->nameidx) < be16_to_cpu(hdr->firstused)) { |
1da177e4 LT |
1186 | /* both on-disk, don't endian-flip twice */ |
1187 | hdr->firstused = entry->nameidx; | |
1188 | } | |
918ae424 NS |
1189 | ASSERT(be16_to_cpu(hdr->firstused) >= |
1190 | ((be16_to_cpu(hdr->count) * sizeof(*entry)) + sizeof(*hdr))); | |
1191 | tmp = (be16_to_cpu(hdr->count)-1) * sizeof(xfs_attr_leaf_entry_t) | |
1da177e4 LT |
1192 | + sizeof(xfs_attr_leaf_hdr_t); |
1193 | map = &hdr->freemap[0]; | |
1194 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; map++, i++) { | |
918ae424 | 1195 | if (be16_to_cpu(map->base) == tmp) { |
413d57c9 MS |
1196 | be16_add_cpu(&map->base, sizeof(xfs_attr_leaf_entry_t)); |
1197 | be16_add_cpu(&map->size, | |
918ae424 | 1198 | -((int)sizeof(xfs_attr_leaf_entry_t))); |
1da177e4 LT |
1199 | } |
1200 | } | |
413d57c9 | 1201 | be16_add_cpu(&hdr->usedbytes, xfs_attr_leaf_entsize(leaf, args->index)); |
1da177e4 LT |
1202 | xfs_da_log_buf(args->trans, bp, |
1203 | XFS_DA_LOGRANGE(leaf, hdr, sizeof(*hdr))); | |
1204 | return(0); | |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * Garbage collect a leaf attribute list block by copying it to a new buffer. | |
1209 | */ | |
1210 | STATIC void | |
1211 | xfs_attr_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *bp) | |
1212 | { | |
1213 | xfs_attr_leafblock_t *leaf_s, *leaf_d; | |
1214 | xfs_attr_leaf_hdr_t *hdr_s, *hdr_d; | |
1215 | xfs_mount_t *mp; | |
1216 | char *tmpbuffer; | |
1217 | ||
1218 | mp = trans->t_mountp; | |
1219 | tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP); | |
1220 | ASSERT(tmpbuffer != NULL); | |
1221 | memcpy(tmpbuffer, bp->data, XFS_LBSIZE(mp)); | |
1222 | memset(bp->data, 0, XFS_LBSIZE(mp)); | |
1223 | ||
1224 | /* | |
1225 | * Copy basic information | |
1226 | */ | |
1227 | leaf_s = (xfs_attr_leafblock_t *)tmpbuffer; | |
1228 | leaf_d = bp->data; | |
1229 | hdr_s = &leaf_s->hdr; | |
1230 | hdr_d = &leaf_d->hdr; | |
1231 | hdr_d->info = hdr_s->info; /* struct copy */ | |
918ae424 | 1232 | hdr_d->firstused = cpu_to_be16(XFS_LBSIZE(mp)); |
1da177e4 LT |
1233 | /* handle truncation gracefully */ |
1234 | if (!hdr_d->firstused) { | |
918ae424 | 1235 | hdr_d->firstused = cpu_to_be16( |
1da177e4 LT |
1236 | XFS_LBSIZE(mp) - XFS_ATTR_LEAF_NAME_ALIGN); |
1237 | } | |
1238 | hdr_d->usedbytes = 0; | |
1239 | hdr_d->count = 0; | |
1240 | hdr_d->holes = 0; | |
918ae424 NS |
1241 | hdr_d->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t)); |
1242 | hdr_d->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr_d->firstused) - | |
1243 | sizeof(xfs_attr_leaf_hdr_t)); | |
1da177e4 LT |
1244 | |
1245 | /* | |
1246 | * Copy all entry's in the same (sorted) order, | |
1247 | * but allocate name/value pairs packed and in sequence. | |
1248 | */ | |
1249 | xfs_attr_leaf_moveents(leaf_s, 0, leaf_d, 0, | |
918ae424 | 1250 | be16_to_cpu(hdr_s->count), mp); |
1da177e4 LT |
1251 | xfs_da_log_buf(trans, bp, 0, XFS_LBSIZE(mp) - 1); |
1252 | ||
f0e2d93c | 1253 | kmem_free(tmpbuffer); |
1da177e4 LT |
1254 | } |
1255 | ||
1256 | /* | |
1257 | * Redistribute the attribute list entries between two leaf nodes, | |
1258 | * taking into account the size of the new entry. | |
1259 | * | |
1260 | * NOTE: if new block is empty, then it will get the upper half of the | |
1261 | * old block. At present, all (one) callers pass in an empty second block. | |
1262 | * | |
1263 | * This code adjusts the args->index/blkno and args->index2/blkno2 fields | |
1264 | * to match what it is doing in splitting the attribute leaf block. Those | |
1265 | * values are used in "atomic rename" operations on attributes. Note that | |
1266 | * the "new" and "old" values can end up in different blocks. | |
1267 | */ | |
1268 | STATIC void | |
1269 | xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, | |
1270 | xfs_da_state_blk_t *blk2) | |
1271 | { | |
1272 | xfs_da_args_t *args; | |
1273 | xfs_da_state_blk_t *tmp_blk; | |
1274 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
1275 | xfs_attr_leaf_hdr_t *hdr1, *hdr2; | |
1276 | int count, totallen, max, space, swap; | |
1277 | ||
1278 | /* | |
1279 | * Set up environment. | |
1280 | */ | |
1281 | ASSERT(blk1->magic == XFS_ATTR_LEAF_MAGIC); | |
1282 | ASSERT(blk2->magic == XFS_ATTR_LEAF_MAGIC); | |
1283 | leaf1 = blk1->bp->data; | |
1284 | leaf2 = blk2->bp->data; | |
69ef921b CH |
1285 | ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1286 | ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); | |
1da177e4 LT |
1287 | args = state->args; |
1288 | ||
5a5881cd DC |
1289 | trace_xfs_attr_leaf_rebalance(args); |
1290 | ||
1da177e4 LT |
1291 | /* |
1292 | * Check ordering of blocks, reverse if it makes things simpler. | |
1293 | * | |
1294 | * NOTE: Given that all (current) callers pass in an empty | |
1295 | * second block, this code should never set "swap". | |
1296 | */ | |
1297 | swap = 0; | |
1298 | if (xfs_attr_leaf_order(blk1->bp, blk2->bp)) { | |
1299 | tmp_blk = blk1; | |
1300 | blk1 = blk2; | |
1301 | blk2 = tmp_blk; | |
1302 | leaf1 = blk1->bp->data; | |
1303 | leaf2 = blk2->bp->data; | |
1304 | swap = 1; | |
1305 | } | |
1306 | hdr1 = &leaf1->hdr; | |
1307 | hdr2 = &leaf2->hdr; | |
1308 | ||
1309 | /* | |
1310 | * Examine entries until we reduce the absolute difference in | |
1311 | * byte usage between the two blocks to a minimum. Then get | |
1312 | * the direction to copy and the number of elements to move. | |
1313 | * | |
1314 | * "inleaf" is true if the new entry should be inserted into blk1. | |
1315 | * If "swap" is also true, then reverse the sense of "inleaf". | |
1316 | */ | |
1317 | state->inleaf = xfs_attr_leaf_figure_balance(state, blk1, blk2, | |
1318 | &count, &totallen); | |
1319 | if (swap) | |
1320 | state->inleaf = !state->inleaf; | |
1321 | ||
1322 | /* | |
1323 | * Move any entries required from leaf to leaf: | |
1324 | */ | |
918ae424 | 1325 | if (count < be16_to_cpu(hdr1->count)) { |
1da177e4 LT |
1326 | /* |
1327 | * Figure the total bytes to be added to the destination leaf. | |
1328 | */ | |
1329 | /* number entries being moved */ | |
918ae424 NS |
1330 | count = be16_to_cpu(hdr1->count) - count; |
1331 | space = be16_to_cpu(hdr1->usedbytes) - totallen; | |
1da177e4 LT |
1332 | space += count * sizeof(xfs_attr_leaf_entry_t); |
1333 | ||
1334 | /* | |
1335 | * leaf2 is the destination, compact it if it looks tight. | |
1336 | */ | |
918ae424 | 1337 | max = be16_to_cpu(hdr2->firstused) |
1da177e4 | 1338 | - sizeof(xfs_attr_leaf_hdr_t); |
918ae424 | 1339 | max -= be16_to_cpu(hdr2->count) * sizeof(xfs_attr_leaf_entry_t); |
1da177e4 LT |
1340 | if (space > max) { |
1341 | xfs_attr_leaf_compact(args->trans, blk2->bp); | |
1342 | } | |
1343 | ||
1344 | /* | |
1345 | * Move high entries from leaf1 to low end of leaf2. | |
1346 | */ | |
918ae424 | 1347 | xfs_attr_leaf_moveents(leaf1, be16_to_cpu(hdr1->count) - count, |
1da177e4 LT |
1348 | leaf2, 0, count, state->mp); |
1349 | ||
1350 | xfs_da_log_buf(args->trans, blk1->bp, 0, state->blocksize-1); | |
1351 | xfs_da_log_buf(args->trans, blk2->bp, 0, state->blocksize-1); | |
918ae424 | 1352 | } else if (count > be16_to_cpu(hdr1->count)) { |
1da177e4 LT |
1353 | /* |
1354 | * I assert that since all callers pass in an empty | |
1355 | * second buffer, this code should never execute. | |
1356 | */ | |
1357 | ||
1358 | /* | |
1359 | * Figure the total bytes to be added to the destination leaf. | |
1360 | */ | |
1361 | /* number entries being moved */ | |
918ae424 NS |
1362 | count -= be16_to_cpu(hdr1->count); |
1363 | space = totallen - be16_to_cpu(hdr1->usedbytes); | |
1da177e4 LT |
1364 | space += count * sizeof(xfs_attr_leaf_entry_t); |
1365 | ||
1366 | /* | |
1367 | * leaf1 is the destination, compact it if it looks tight. | |
1368 | */ | |
918ae424 | 1369 | max = be16_to_cpu(hdr1->firstused) |
1da177e4 | 1370 | - sizeof(xfs_attr_leaf_hdr_t); |
918ae424 | 1371 | max -= be16_to_cpu(hdr1->count) * sizeof(xfs_attr_leaf_entry_t); |
1da177e4 LT |
1372 | if (space > max) { |
1373 | xfs_attr_leaf_compact(args->trans, blk1->bp); | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Move low entries from leaf2 to high end of leaf1. | |
1378 | */ | |
1379 | xfs_attr_leaf_moveents(leaf2, 0, leaf1, | |
918ae424 | 1380 | be16_to_cpu(hdr1->count), count, state->mp); |
1da177e4 LT |
1381 | |
1382 | xfs_da_log_buf(args->trans, blk1->bp, 0, state->blocksize-1); | |
1383 | xfs_da_log_buf(args->trans, blk2->bp, 0, state->blocksize-1); | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * Copy out last hashval in each block for B-tree code. | |
1388 | */ | |
6b19f2d8 NS |
1389 | blk1->hashval = be32_to_cpu( |
1390 | leaf1->entries[be16_to_cpu(leaf1->hdr.count)-1].hashval); | |
1391 | blk2->hashval = be32_to_cpu( | |
1392 | leaf2->entries[be16_to_cpu(leaf2->hdr.count)-1].hashval); | |
1da177e4 LT |
1393 | |
1394 | /* | |
1395 | * Adjust the expected index for insertion. | |
1396 | * NOTE: this code depends on the (current) situation that the | |
1397 | * second block was originally empty. | |
1398 | * | |
1399 | * If the insertion point moved to the 2nd block, we must adjust | |
1400 | * the index. We must also track the entry just following the | |
1401 | * new entry for use in an "atomic rename" operation, that entry | |
1402 | * is always the "old" entry and the "new" entry is what we are | |
1403 | * inserting. The index/blkno fields refer to the "old" entry, | |
1404 | * while the index2/blkno2 fields refer to the "new" entry. | |
1405 | */ | |
918ae424 | 1406 | if (blk1->index > be16_to_cpu(leaf1->hdr.count)) { |
1da177e4 | 1407 | ASSERT(state->inleaf == 0); |
918ae424 | 1408 | blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count); |
1da177e4 LT |
1409 | args->index = args->index2 = blk2->index; |
1410 | args->blkno = args->blkno2 = blk2->blkno; | |
918ae424 | 1411 | } else if (blk1->index == be16_to_cpu(leaf1->hdr.count)) { |
1da177e4 LT |
1412 | if (state->inleaf) { |
1413 | args->index = blk1->index; | |
1414 | args->blkno = blk1->blkno; | |
1415 | args->index2 = 0; | |
1416 | args->blkno2 = blk2->blkno; | |
1417 | } else { | |
1418 | blk2->index = blk1->index | |
918ae424 | 1419 | - be16_to_cpu(leaf1->hdr.count); |
1da177e4 LT |
1420 | args->index = args->index2 = blk2->index; |
1421 | args->blkno = args->blkno2 = blk2->blkno; | |
1422 | } | |
1423 | } else { | |
1424 | ASSERT(state->inleaf == 1); | |
1425 | args->index = args->index2 = blk1->index; | |
1426 | args->blkno = args->blkno2 = blk1->blkno; | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | /* | |
1431 | * Examine entries until we reduce the absolute difference in | |
1432 | * byte usage between the two blocks to a minimum. | |
1433 | * GROT: Is this really necessary? With other than a 512 byte blocksize, | |
1434 | * GROT: there will always be enough room in either block for a new entry. | |
1435 | * GROT: Do a double-split for this case? | |
1436 | */ | |
1437 | STATIC int | |
1438 | xfs_attr_leaf_figure_balance(xfs_da_state_t *state, | |
1439 | xfs_da_state_blk_t *blk1, | |
1440 | xfs_da_state_blk_t *blk2, | |
1441 | int *countarg, int *usedbytesarg) | |
1442 | { | |
1443 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
1444 | xfs_attr_leaf_hdr_t *hdr1, *hdr2; | |
1445 | xfs_attr_leaf_entry_t *entry; | |
1446 | int count, max, index, totallen, half; | |
1447 | int lastdelta, foundit, tmp; | |
1448 | ||
1449 | /* | |
1450 | * Set up environment. | |
1451 | */ | |
1452 | leaf1 = blk1->bp->data; | |
1453 | leaf2 = blk2->bp->data; | |
1454 | hdr1 = &leaf1->hdr; | |
1455 | hdr2 = &leaf2->hdr; | |
1456 | foundit = 0; | |
1457 | totallen = 0; | |
1458 | ||
1459 | /* | |
1460 | * Examine entries until we reduce the absolute difference in | |
1461 | * byte usage between the two blocks to a minimum. | |
1462 | */ | |
918ae424 | 1463 | max = be16_to_cpu(hdr1->count) + be16_to_cpu(hdr2->count); |
1da177e4 | 1464 | half = (max+1) * sizeof(*entry); |
918ae424 NS |
1465 | half += be16_to_cpu(hdr1->usedbytes) + |
1466 | be16_to_cpu(hdr2->usedbytes) + | |
1467 | xfs_attr_leaf_newentsize( | |
1468 | state->args->namelen, | |
1469 | state->args->valuelen, | |
1470 | state->blocksize, NULL); | |
1da177e4 LT |
1471 | half /= 2; |
1472 | lastdelta = state->blocksize; | |
1473 | entry = &leaf1->entries[0]; | |
1474 | for (count = index = 0; count < max; entry++, index++, count++) { | |
1475 | ||
1476 | #define XFS_ATTR_ABS(A) (((A) < 0) ? -(A) : (A)) | |
1477 | /* | |
1478 | * The new entry is in the first block, account for it. | |
1479 | */ | |
1480 | if (count == blk1->index) { | |
1481 | tmp = totallen + sizeof(*entry) + | |
aa82daa0 NS |
1482 | xfs_attr_leaf_newentsize( |
1483 | state->args->namelen, | |
1484 | state->args->valuelen, | |
1485 | state->blocksize, NULL); | |
1da177e4 LT |
1486 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) |
1487 | break; | |
1488 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1489 | totallen = tmp; | |
1490 | foundit = 1; | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * Wrap around into the second block if necessary. | |
1495 | */ | |
918ae424 | 1496 | if (count == be16_to_cpu(hdr1->count)) { |
1da177e4 LT |
1497 | leaf1 = leaf2; |
1498 | entry = &leaf1->entries[0]; | |
1499 | index = 0; | |
1500 | } | |
1501 | ||
1502 | /* | |
1503 | * Figure out if next leaf entry would be too much. | |
1504 | */ | |
1505 | tmp = totallen + sizeof(*entry) + xfs_attr_leaf_entsize(leaf1, | |
1506 | index); | |
1507 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) | |
1508 | break; | |
1509 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1510 | totallen = tmp; | |
1511 | #undef XFS_ATTR_ABS | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Calculate the number of usedbytes that will end up in lower block. | |
1516 | * If new entry not in lower block, fix up the count. | |
1517 | */ | |
1518 | totallen -= count * sizeof(*entry); | |
1519 | if (foundit) { | |
1520 | totallen -= sizeof(*entry) + | |
aa82daa0 NS |
1521 | xfs_attr_leaf_newentsize( |
1522 | state->args->namelen, | |
1523 | state->args->valuelen, | |
1524 | state->blocksize, NULL); | |
1da177e4 LT |
1525 | } |
1526 | ||
1527 | *countarg = count; | |
1528 | *usedbytesarg = totallen; | |
1529 | return(foundit); | |
1530 | } | |
1531 | ||
1532 | /*======================================================================== | |
1533 | * Routines used for shrinking the Btree. | |
1534 | *========================================================================*/ | |
1535 | ||
1536 | /* | |
1537 | * Check a leaf block and its neighbors to see if the block should be | |
1538 | * collapsed into one or the other neighbor. Always keep the block | |
1539 | * with the smaller block number. | |
1540 | * If the current block is over 50% full, don't try to join it, return 0. | |
1541 | * If the block is empty, fill in the state structure and return 2. | |
1542 | * If it can be collapsed, fill in the state structure and return 1. | |
1543 | * If nothing can be done, return 0. | |
1544 | * | |
1545 | * GROT: allow for INCOMPLETE entries in calculation. | |
1546 | */ | |
1547 | int | |
1548 | xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action) | |
1549 | { | |
1550 | xfs_attr_leafblock_t *leaf; | |
1551 | xfs_da_state_blk_t *blk; | |
1552 | xfs_da_blkinfo_t *info; | |
1553 | int count, bytes, forward, error, retval, i; | |
1554 | xfs_dablk_t blkno; | |
1555 | xfs_dabuf_t *bp; | |
1556 | ||
1557 | /* | |
1558 | * Check for the degenerate case of the block being over 50% full. | |
1559 | * If so, it's not worth even looking to see if we might be able | |
1560 | * to coalesce with a sibling. | |
1561 | */ | |
1562 | blk = &state->path.blk[ state->path.active-1 ]; | |
1563 | info = blk->bp->data; | |
69ef921b | 1564 | ASSERT(info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 | 1565 | leaf = (xfs_attr_leafblock_t *)info; |
918ae424 | 1566 | count = be16_to_cpu(leaf->hdr.count); |
1da177e4 LT |
1567 | bytes = sizeof(xfs_attr_leaf_hdr_t) + |
1568 | count * sizeof(xfs_attr_leaf_entry_t) + | |
918ae424 | 1569 | be16_to_cpu(leaf->hdr.usedbytes); |
1da177e4 LT |
1570 | if (bytes > (state->blocksize >> 1)) { |
1571 | *action = 0; /* blk over 50%, don't try to join */ | |
1572 | return(0); | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * Check for the degenerate case of the block being empty. | |
1577 | * If the block is empty, we'll simply delete it, no need to | |
c41564b5 | 1578 | * coalesce it with a sibling block. We choose (arbitrarily) |
1da177e4 LT |
1579 | * to merge with the forward block unless it is NULL. |
1580 | */ | |
1581 | if (count == 0) { | |
1582 | /* | |
1583 | * Make altpath point to the block we want to keep and | |
1584 | * path point to the block we want to drop (this one). | |
1585 | */ | |
89da0544 | 1586 | forward = (info->forw != 0); |
1da177e4 LT |
1587 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
1588 | error = xfs_da_path_shift(state, &state->altpath, forward, | |
1589 | 0, &retval); | |
1590 | if (error) | |
1591 | return(error); | |
1592 | if (retval) { | |
1593 | *action = 0; | |
1594 | } else { | |
1595 | *action = 2; | |
1596 | } | |
1597 | return(0); | |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * Examine each sibling block to see if we can coalesce with | |
1602 | * at least 25% free space to spare. We need to figure out | |
1603 | * whether to merge with the forward or the backward block. | |
1604 | * We prefer coalescing with the lower numbered sibling so as | |
1605 | * to shrink an attribute list over time. | |
1606 | */ | |
1607 | /* start with smaller blk num */ | |
89da0544 | 1608 | forward = (be32_to_cpu(info->forw) < be32_to_cpu(info->back)); |
1da177e4 LT |
1609 | for (i = 0; i < 2; forward = !forward, i++) { |
1610 | if (forward) | |
89da0544 | 1611 | blkno = be32_to_cpu(info->forw); |
1da177e4 | 1612 | else |
89da0544 | 1613 | blkno = be32_to_cpu(info->back); |
1da177e4 LT |
1614 | if (blkno == 0) |
1615 | continue; | |
1616 | error = xfs_da_read_buf(state->args->trans, state->args->dp, | |
1617 | blkno, -1, &bp, XFS_ATTR_FORK); | |
1618 | if (error) | |
1619 | return(error); | |
1620 | ASSERT(bp != NULL); | |
1621 | ||
1622 | leaf = (xfs_attr_leafblock_t *)info; | |
918ae424 | 1623 | count = be16_to_cpu(leaf->hdr.count); |
1da177e4 | 1624 | bytes = state->blocksize - (state->blocksize>>2); |
918ae424 | 1625 | bytes -= be16_to_cpu(leaf->hdr.usedbytes); |
1da177e4 | 1626 | leaf = bp->data; |
69ef921b | 1627 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 NS |
1628 | count += be16_to_cpu(leaf->hdr.count); |
1629 | bytes -= be16_to_cpu(leaf->hdr.usedbytes); | |
1da177e4 LT |
1630 | bytes -= count * sizeof(xfs_attr_leaf_entry_t); |
1631 | bytes -= sizeof(xfs_attr_leaf_hdr_t); | |
1632 | xfs_da_brelse(state->args->trans, bp); | |
1633 | if (bytes >= 0) | |
1634 | break; /* fits with at least 25% to spare */ | |
1635 | } | |
1636 | if (i >= 2) { | |
1637 | *action = 0; | |
1638 | return(0); | |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * Make altpath point to the block we want to keep (the lower | |
1643 | * numbered block) and path point to the block we want to drop. | |
1644 | */ | |
1645 | memcpy(&state->altpath, &state->path, sizeof(state->path)); | |
1646 | if (blkno < blk->blkno) { | |
1647 | error = xfs_da_path_shift(state, &state->altpath, forward, | |
1648 | 0, &retval); | |
1649 | } else { | |
1650 | error = xfs_da_path_shift(state, &state->path, forward, | |
1651 | 0, &retval); | |
1652 | } | |
1653 | if (error) | |
1654 | return(error); | |
1655 | if (retval) { | |
1656 | *action = 0; | |
1657 | } else { | |
1658 | *action = 1; | |
1659 | } | |
1660 | return(0); | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * Remove a name from the leaf attribute list structure. | |
1665 | * | |
1666 | * Return 1 if leaf is less than 37% full, 0 if >= 37% full. | |
1667 | * If two leaves are 37% full, when combined they will leave 25% free. | |
1668 | */ | |
1669 | int | |
1670 | xfs_attr_leaf_remove(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
1671 | { | |
1672 | xfs_attr_leafblock_t *leaf; | |
1673 | xfs_attr_leaf_hdr_t *hdr; | |
1674 | xfs_attr_leaf_map_t *map; | |
1675 | xfs_attr_leaf_entry_t *entry; | |
1676 | int before, after, smallest, entsize; | |
1677 | int tablesize, tmp, i; | |
1678 | xfs_mount_t *mp; | |
1679 | ||
1680 | leaf = bp->data; | |
69ef921b | 1681 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 LT |
1682 | hdr = &leaf->hdr; |
1683 | mp = args->trans->t_mountp; | |
918ae424 NS |
1684 | ASSERT((be16_to_cpu(hdr->count) > 0) |
1685 | && (be16_to_cpu(hdr->count) < (XFS_LBSIZE(mp)/8))); | |
1da177e4 | 1686 | ASSERT((args->index >= 0) |
918ae424 NS |
1687 | && (args->index < be16_to_cpu(hdr->count))); |
1688 | ASSERT(be16_to_cpu(hdr->firstused) >= | |
1689 | ((be16_to_cpu(hdr->count) * sizeof(*entry)) + sizeof(*hdr))); | |
1da177e4 | 1690 | entry = &leaf->entries[args->index]; |
6b19f2d8 NS |
1691 | ASSERT(be16_to_cpu(entry->nameidx) >= be16_to_cpu(hdr->firstused)); |
1692 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); | |
1da177e4 LT |
1693 | |
1694 | /* | |
1695 | * Scan through free region table: | |
1696 | * check for adjacency of free'd entry with an existing one, | |
1697 | * find smallest free region in case we need to replace it, | |
1698 | * adjust any map that borders the entry table, | |
1699 | */ | |
918ae424 | 1700 | tablesize = be16_to_cpu(hdr->count) * sizeof(xfs_attr_leaf_entry_t) |
1da177e4 LT |
1701 | + sizeof(xfs_attr_leaf_hdr_t); |
1702 | map = &hdr->freemap[0]; | |
918ae424 | 1703 | tmp = be16_to_cpu(map->size); |
1da177e4 LT |
1704 | before = after = -1; |
1705 | smallest = XFS_ATTR_LEAF_MAPSIZE - 1; | |
1706 | entsize = xfs_attr_leaf_entsize(leaf, args->index); | |
1707 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; map++, i++) { | |
918ae424 NS |
1708 | ASSERT(be16_to_cpu(map->base) < XFS_LBSIZE(mp)); |
1709 | ASSERT(be16_to_cpu(map->size) < XFS_LBSIZE(mp)); | |
1710 | if (be16_to_cpu(map->base) == tablesize) { | |
413d57c9 | 1711 | be16_add_cpu(&map->base, |
918ae424 | 1712 | -((int)sizeof(xfs_attr_leaf_entry_t))); |
413d57c9 | 1713 | be16_add_cpu(&map->size, sizeof(xfs_attr_leaf_entry_t)); |
1da177e4 LT |
1714 | } |
1715 | ||
918ae424 | 1716 | if ((be16_to_cpu(map->base) + be16_to_cpu(map->size)) |
6b19f2d8 | 1717 | == be16_to_cpu(entry->nameidx)) { |
1da177e4 | 1718 | before = i; |
918ae424 | 1719 | } else if (be16_to_cpu(map->base) |
6b19f2d8 | 1720 | == (be16_to_cpu(entry->nameidx) + entsize)) { |
1da177e4 | 1721 | after = i; |
918ae424 NS |
1722 | } else if (be16_to_cpu(map->size) < tmp) { |
1723 | tmp = be16_to_cpu(map->size); | |
1da177e4 LT |
1724 | smallest = i; |
1725 | } | |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * Coalesce adjacent freemap regions, | |
1730 | * or replace the smallest region. | |
1731 | */ | |
1732 | if ((before >= 0) || (after >= 0)) { | |
1733 | if ((before >= 0) && (after >= 0)) { | |
1734 | map = &hdr->freemap[before]; | |
413d57c9 MS |
1735 | be16_add_cpu(&map->size, entsize); |
1736 | be16_add_cpu(&map->size, | |
918ae424 | 1737 | be16_to_cpu(hdr->freemap[after].size)); |
1da177e4 LT |
1738 | hdr->freemap[after].base = 0; |
1739 | hdr->freemap[after].size = 0; | |
1740 | } else if (before >= 0) { | |
1741 | map = &hdr->freemap[before]; | |
413d57c9 | 1742 | be16_add_cpu(&map->size, entsize); |
1da177e4 LT |
1743 | } else { |
1744 | map = &hdr->freemap[after]; | |
1745 | /* both on-disk, don't endian flip twice */ | |
1746 | map->base = entry->nameidx; | |
413d57c9 | 1747 | be16_add_cpu(&map->size, entsize); |
1da177e4 LT |
1748 | } |
1749 | } else { | |
1750 | /* | |
1751 | * Replace smallest region (if it is smaller than free'd entry) | |
1752 | */ | |
1753 | map = &hdr->freemap[smallest]; | |
918ae424 | 1754 | if (be16_to_cpu(map->size) < entsize) { |
6b19f2d8 | 1755 | map->base = cpu_to_be16(be16_to_cpu(entry->nameidx)); |
918ae424 | 1756 | map->size = cpu_to_be16(entsize); |
1da177e4 LT |
1757 | } |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * Did we remove the first entry? | |
1762 | */ | |
6b19f2d8 | 1763 | if (be16_to_cpu(entry->nameidx) == be16_to_cpu(hdr->firstused)) |
1da177e4 LT |
1764 | smallest = 1; |
1765 | else | |
1766 | smallest = 0; | |
1767 | ||
1768 | /* | |
1769 | * Compress the remaining entries and zero out the removed stuff. | |
1770 | */ | |
c9fb86a9 | 1771 | memset(xfs_attr_leaf_name(leaf, args->index), 0, entsize); |
413d57c9 | 1772 | be16_add_cpu(&hdr->usedbytes, -entsize); |
1da177e4 | 1773 | xfs_da_log_buf(args->trans, bp, |
c9fb86a9 | 1774 | XFS_DA_LOGRANGE(leaf, xfs_attr_leaf_name(leaf, args->index), |
1da177e4 LT |
1775 | entsize)); |
1776 | ||
918ae424 | 1777 | tmp = (be16_to_cpu(hdr->count) - args->index) |
1da177e4 LT |
1778 | * sizeof(xfs_attr_leaf_entry_t); |
1779 | memmove((char *)entry, (char *)(entry+1), tmp); | |
413d57c9 | 1780 | be16_add_cpu(&hdr->count, -1); |
1da177e4 LT |
1781 | xfs_da_log_buf(args->trans, bp, |
1782 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); | |
918ae424 | 1783 | entry = &leaf->entries[be16_to_cpu(hdr->count)]; |
1da177e4 LT |
1784 | memset((char *)entry, 0, sizeof(xfs_attr_leaf_entry_t)); |
1785 | ||
1786 | /* | |
1787 | * If we removed the first entry, re-find the first used byte | |
1788 | * in the name area. Note that if the entry was the "firstused", | |
1789 | * then we don't have a "hole" in our block resulting from | |
1790 | * removing the name. | |
1791 | */ | |
1792 | if (smallest) { | |
1793 | tmp = XFS_LBSIZE(mp); | |
1794 | entry = &leaf->entries[0]; | |
918ae424 | 1795 | for (i = be16_to_cpu(hdr->count)-1; i >= 0; entry++, i--) { |
6b19f2d8 NS |
1796 | ASSERT(be16_to_cpu(entry->nameidx) >= |
1797 | be16_to_cpu(hdr->firstused)); | |
1798 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); | |
1799 | ||
1800 | if (be16_to_cpu(entry->nameidx) < tmp) | |
1801 | tmp = be16_to_cpu(entry->nameidx); | |
1da177e4 | 1802 | } |
918ae424 | 1803 | hdr->firstused = cpu_to_be16(tmp); |
1da177e4 | 1804 | if (!hdr->firstused) { |
918ae424 | 1805 | hdr->firstused = cpu_to_be16( |
1da177e4 LT |
1806 | tmp - XFS_ATTR_LEAF_NAME_ALIGN); |
1807 | } | |
1808 | } else { | |
1809 | hdr->holes = 1; /* mark as needing compaction */ | |
1810 | } | |
1811 | xfs_da_log_buf(args->trans, bp, | |
1812 | XFS_DA_LOGRANGE(leaf, hdr, sizeof(*hdr))); | |
1813 | ||
1814 | /* | |
1815 | * Check if leaf is less than 50% full, caller may want to | |
1816 | * "join" the leaf with a sibling if so. | |
1817 | */ | |
1818 | tmp = sizeof(xfs_attr_leaf_hdr_t); | |
918ae424 NS |
1819 | tmp += be16_to_cpu(leaf->hdr.count) * sizeof(xfs_attr_leaf_entry_t); |
1820 | tmp += be16_to_cpu(leaf->hdr.usedbytes); | |
1da177e4 LT |
1821 | return(tmp < mp->m_attr_magicpct); /* leaf is < 37% full */ |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * Move all the attribute list entries from drop_leaf into save_leaf. | |
1826 | */ | |
1827 | void | |
1828 | xfs_attr_leaf_unbalance(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk, | |
1829 | xfs_da_state_blk_t *save_blk) | |
1830 | { | |
1831 | xfs_attr_leafblock_t *drop_leaf, *save_leaf, *tmp_leaf; | |
1832 | xfs_attr_leaf_hdr_t *drop_hdr, *save_hdr, *tmp_hdr; | |
1833 | xfs_mount_t *mp; | |
1834 | char *tmpbuffer; | |
1835 | ||
5a5881cd DC |
1836 | trace_xfs_attr_leaf_unbalance(state->args); |
1837 | ||
1da177e4 LT |
1838 | /* |
1839 | * Set up environment. | |
1840 | */ | |
1841 | mp = state->mp; | |
1842 | ASSERT(drop_blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1843 | ASSERT(save_blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1844 | drop_leaf = drop_blk->bp->data; | |
1845 | save_leaf = save_blk->bp->data; | |
69ef921b CH |
1846 | ASSERT(drop_leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1847 | ASSERT(save_leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); | |
1da177e4 LT |
1848 | drop_hdr = &drop_leaf->hdr; |
1849 | save_hdr = &save_leaf->hdr; | |
1850 | ||
1851 | /* | |
1852 | * Save last hashval from dying block for later Btree fixup. | |
1853 | */ | |
6b19f2d8 NS |
1854 | drop_blk->hashval = be32_to_cpu( |
1855 | drop_leaf->entries[be16_to_cpu(drop_leaf->hdr.count)-1].hashval); | |
1da177e4 LT |
1856 | |
1857 | /* | |
1858 | * Check if we need a temp buffer, or can we do it in place. | |
1859 | * Note that we don't check "leaf" for holes because we will | |
1860 | * always be dropping it, toosmall() decided that for us already. | |
1861 | */ | |
1862 | if (save_hdr->holes == 0) { | |
1863 | /* | |
1864 | * dest leaf has no holes, so we add there. May need | |
1865 | * to make some room in the entry array. | |
1866 | */ | |
1867 | if (xfs_attr_leaf_order(save_blk->bp, drop_blk->bp)) { | |
1868 | xfs_attr_leaf_moveents(drop_leaf, 0, save_leaf, 0, | |
918ae424 | 1869 | be16_to_cpu(drop_hdr->count), mp); |
1da177e4 LT |
1870 | } else { |
1871 | xfs_attr_leaf_moveents(drop_leaf, 0, save_leaf, | |
918ae424 NS |
1872 | be16_to_cpu(save_hdr->count), |
1873 | be16_to_cpu(drop_hdr->count), mp); | |
1da177e4 LT |
1874 | } |
1875 | } else { | |
1876 | /* | |
1877 | * Destination has holes, so we make a temporary copy | |
1878 | * of the leaf and add them both to that. | |
1879 | */ | |
1880 | tmpbuffer = kmem_alloc(state->blocksize, KM_SLEEP); | |
1881 | ASSERT(tmpbuffer != NULL); | |
1882 | memset(tmpbuffer, 0, state->blocksize); | |
1883 | tmp_leaf = (xfs_attr_leafblock_t *)tmpbuffer; | |
1884 | tmp_hdr = &tmp_leaf->hdr; | |
1885 | tmp_hdr->info = save_hdr->info; /* struct copy */ | |
1886 | tmp_hdr->count = 0; | |
918ae424 | 1887 | tmp_hdr->firstused = cpu_to_be16(state->blocksize); |
1da177e4 | 1888 | if (!tmp_hdr->firstused) { |
918ae424 | 1889 | tmp_hdr->firstused = cpu_to_be16( |
1da177e4 LT |
1890 | state->blocksize - XFS_ATTR_LEAF_NAME_ALIGN); |
1891 | } | |
1892 | tmp_hdr->usedbytes = 0; | |
1893 | if (xfs_attr_leaf_order(save_blk->bp, drop_blk->bp)) { | |
1894 | xfs_attr_leaf_moveents(drop_leaf, 0, tmp_leaf, 0, | |
918ae424 | 1895 | be16_to_cpu(drop_hdr->count), mp); |
1da177e4 | 1896 | xfs_attr_leaf_moveents(save_leaf, 0, tmp_leaf, |
918ae424 NS |
1897 | be16_to_cpu(tmp_leaf->hdr.count), |
1898 | be16_to_cpu(save_hdr->count), mp); | |
1da177e4 LT |
1899 | } else { |
1900 | xfs_attr_leaf_moveents(save_leaf, 0, tmp_leaf, 0, | |
918ae424 | 1901 | be16_to_cpu(save_hdr->count), mp); |
1da177e4 | 1902 | xfs_attr_leaf_moveents(drop_leaf, 0, tmp_leaf, |
918ae424 NS |
1903 | be16_to_cpu(tmp_leaf->hdr.count), |
1904 | be16_to_cpu(drop_hdr->count), mp); | |
1da177e4 LT |
1905 | } |
1906 | memcpy((char *)save_leaf, (char *)tmp_leaf, state->blocksize); | |
f0e2d93c | 1907 | kmem_free(tmpbuffer); |
1da177e4 LT |
1908 | } |
1909 | ||
1910 | xfs_da_log_buf(state->args->trans, save_blk->bp, 0, | |
1911 | state->blocksize - 1); | |
1912 | ||
1913 | /* | |
1914 | * Copy out last hashval in each block for B-tree code. | |
1915 | */ | |
6b19f2d8 NS |
1916 | save_blk->hashval = be32_to_cpu( |
1917 | save_leaf->entries[be16_to_cpu(save_leaf->hdr.count)-1].hashval); | |
1da177e4 LT |
1918 | } |
1919 | ||
1920 | /*======================================================================== | |
1921 | * Routines used for finding things in the Btree. | |
1922 | *========================================================================*/ | |
1923 | ||
1924 | /* | |
1925 | * Look up a name in a leaf attribute list structure. | |
1926 | * This is the internal routine, it uses the caller's buffer. | |
1927 | * | |
1928 | * Note that duplicate keys are allowed, but only check within the | |
1929 | * current leaf node. The Btree code must check in adjacent leaf nodes. | |
1930 | * | |
1931 | * Return in args->index the index into the entry[] array of either | |
1932 | * the found entry, or where the entry should have been (insert before | |
1933 | * that entry). | |
1934 | * | |
1935 | * Don't change the args->value unless we find the attribute. | |
1936 | */ | |
1937 | int | |
1938 | xfs_attr_leaf_lookup_int(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
1939 | { | |
1940 | xfs_attr_leafblock_t *leaf; | |
1941 | xfs_attr_leaf_entry_t *entry; | |
1942 | xfs_attr_leaf_name_local_t *name_loc; | |
1943 | xfs_attr_leaf_name_remote_t *name_rmt; | |
1944 | int probe, span; | |
1945 | xfs_dahash_t hashval; | |
1946 | ||
5a5881cd DC |
1947 | trace_xfs_attr_leaf_lookup(args); |
1948 | ||
1da177e4 | 1949 | leaf = bp->data; |
69ef921b | 1950 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 | 1951 | ASSERT(be16_to_cpu(leaf->hdr.count) |
1da177e4 LT |
1952 | < (XFS_LBSIZE(args->dp->i_mount)/8)); |
1953 | ||
1954 | /* | |
1955 | * Binary search. (note: small blocks will skip this loop) | |
1956 | */ | |
1957 | hashval = args->hashval; | |
918ae424 | 1958 | probe = span = be16_to_cpu(leaf->hdr.count) / 2; |
1da177e4 LT |
1959 | for (entry = &leaf->entries[probe]; span > 4; |
1960 | entry = &leaf->entries[probe]) { | |
1961 | span /= 2; | |
6b19f2d8 | 1962 | if (be32_to_cpu(entry->hashval) < hashval) |
1da177e4 | 1963 | probe += span; |
6b19f2d8 | 1964 | else if (be32_to_cpu(entry->hashval) > hashval) |
1da177e4 LT |
1965 | probe -= span; |
1966 | else | |
1967 | break; | |
1968 | } | |
726801ba | 1969 | ASSERT((probe >= 0) && |
1da177e4 | 1970 | (!leaf->hdr.count |
918ae424 | 1971 | || (probe < be16_to_cpu(leaf->hdr.count)))); |
6b19f2d8 | 1972 | ASSERT((span <= 4) || (be32_to_cpu(entry->hashval) == hashval)); |
1da177e4 LT |
1973 | |
1974 | /* | |
1975 | * Since we may have duplicate hashval's, find the first matching | |
1976 | * hashval in the leaf. | |
1977 | */ | |
6b19f2d8 | 1978 | while ((probe > 0) && (be32_to_cpu(entry->hashval) >= hashval)) { |
1da177e4 LT |
1979 | entry--; |
1980 | probe--; | |
1981 | } | |
6b19f2d8 NS |
1982 | while ((probe < be16_to_cpu(leaf->hdr.count)) && |
1983 | (be32_to_cpu(entry->hashval) < hashval)) { | |
1da177e4 LT |
1984 | entry++; |
1985 | probe++; | |
1986 | } | |
6b19f2d8 NS |
1987 | if ((probe == be16_to_cpu(leaf->hdr.count)) || |
1988 | (be32_to_cpu(entry->hashval) != hashval)) { | |
1da177e4 LT |
1989 | args->index = probe; |
1990 | return(XFS_ERROR(ENOATTR)); | |
1991 | } | |
1992 | ||
1993 | /* | |
1994 | * Duplicate keys may be present, so search all of them for a match. | |
1995 | */ | |
6b19f2d8 NS |
1996 | for ( ; (probe < be16_to_cpu(leaf->hdr.count)) && |
1997 | (be32_to_cpu(entry->hashval) == hashval); | |
1da177e4 LT |
1998 | entry++, probe++) { |
1999 | /* | |
2000 | * GROT: Add code to remove incomplete entries. | |
2001 | */ | |
2002 | /* | |
2003 | * If we are looking for INCOMPLETE entries, show only those. | |
2004 | * If we are looking for complete entries, show only those. | |
2005 | */ | |
2006 | if ((args->flags & XFS_ATTR_INCOMPLETE) != | |
2007 | (entry->flags & XFS_ATTR_INCOMPLETE)) { | |
2008 | continue; | |
2009 | } | |
2010 | if (entry->flags & XFS_ATTR_LOCAL) { | |
c9fb86a9 | 2011 | name_loc = xfs_attr_leaf_name_local(leaf, probe); |
1da177e4 LT |
2012 | if (name_loc->namelen != args->namelen) |
2013 | continue; | |
726801ba | 2014 | if (memcmp(args->name, (char *)name_loc->nameval, args->namelen) != 0) |
1da177e4 | 2015 | continue; |
726801ba | 2016 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
1da177e4 LT |
2017 | continue; |
2018 | args->index = probe; | |
2019 | return(XFS_ERROR(EEXIST)); | |
2020 | } else { | |
c9fb86a9 | 2021 | name_rmt = xfs_attr_leaf_name_remote(leaf, probe); |
1da177e4 LT |
2022 | if (name_rmt->namelen != args->namelen) |
2023 | continue; | |
2024 | if (memcmp(args->name, (char *)name_rmt->name, | |
2025 | args->namelen) != 0) | |
2026 | continue; | |
726801ba | 2027 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
1da177e4 LT |
2028 | continue; |
2029 | args->index = probe; | |
c0f054e7 | 2030 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
1da177e4 | 2031 | args->rmtblkcnt = XFS_B_TO_FSB(args->dp->i_mount, |
c0f054e7 | 2032 | be32_to_cpu(name_rmt->valuelen)); |
1da177e4 LT |
2033 | return(XFS_ERROR(EEXIST)); |
2034 | } | |
2035 | } | |
2036 | args->index = probe; | |
2037 | return(XFS_ERROR(ENOATTR)); | |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * Get the value associated with an attribute name from a leaf attribute | |
2042 | * list structure. | |
2043 | */ | |
2044 | int | |
2045 | xfs_attr_leaf_getvalue(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
2046 | { | |
2047 | int valuelen; | |
2048 | xfs_attr_leafblock_t *leaf; | |
2049 | xfs_attr_leaf_entry_t *entry; | |
2050 | xfs_attr_leaf_name_local_t *name_loc; | |
2051 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2052 | ||
2053 | leaf = bp->data; | |
69ef921b | 2054 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 | 2055 | ASSERT(be16_to_cpu(leaf->hdr.count) |
1da177e4 | 2056 | < (XFS_LBSIZE(args->dp->i_mount)/8)); |
918ae424 | 2057 | ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); |
1da177e4 LT |
2058 | |
2059 | entry = &leaf->entries[args->index]; | |
2060 | if (entry->flags & XFS_ATTR_LOCAL) { | |
c9fb86a9 | 2061 | name_loc = xfs_attr_leaf_name_local(leaf, args->index); |
1da177e4 LT |
2062 | ASSERT(name_loc->namelen == args->namelen); |
2063 | ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0); | |
053b5758 | 2064 | valuelen = be16_to_cpu(name_loc->valuelen); |
1da177e4 LT |
2065 | if (args->flags & ATTR_KERNOVAL) { |
2066 | args->valuelen = valuelen; | |
2067 | return(0); | |
2068 | } | |
2069 | if (args->valuelen < valuelen) { | |
2070 | args->valuelen = valuelen; | |
2071 | return(XFS_ERROR(ERANGE)); | |
2072 | } | |
2073 | args->valuelen = valuelen; | |
2074 | memcpy(args->value, &name_loc->nameval[args->namelen], valuelen); | |
2075 | } else { | |
c9fb86a9 | 2076 | name_rmt = xfs_attr_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2077 | ASSERT(name_rmt->namelen == args->namelen); |
2078 | ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0); | |
c0f054e7 NS |
2079 | valuelen = be32_to_cpu(name_rmt->valuelen); |
2080 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); | |
1da177e4 LT |
2081 | args->rmtblkcnt = XFS_B_TO_FSB(args->dp->i_mount, valuelen); |
2082 | if (args->flags & ATTR_KERNOVAL) { | |
2083 | args->valuelen = valuelen; | |
2084 | return(0); | |
2085 | } | |
2086 | if (args->valuelen < valuelen) { | |
2087 | args->valuelen = valuelen; | |
2088 | return(XFS_ERROR(ERANGE)); | |
2089 | } | |
2090 | args->valuelen = valuelen; | |
2091 | } | |
2092 | return(0); | |
2093 | } | |
2094 | ||
2095 | /*======================================================================== | |
2096 | * Utility routines. | |
2097 | *========================================================================*/ | |
2098 | ||
2099 | /* | |
2100 | * Move the indicated entries from one leaf to another. | |
2101 | * NOTE: this routine modifies both source and destination leaves. | |
2102 | */ | |
2103 | /*ARGSUSED*/ | |
2104 | STATIC void | |
2105 | xfs_attr_leaf_moveents(xfs_attr_leafblock_t *leaf_s, int start_s, | |
2106 | xfs_attr_leafblock_t *leaf_d, int start_d, | |
2107 | int count, xfs_mount_t *mp) | |
2108 | { | |
2109 | xfs_attr_leaf_hdr_t *hdr_s, *hdr_d; | |
2110 | xfs_attr_leaf_entry_t *entry_s, *entry_d; | |
2111 | int desti, tmp, i; | |
2112 | ||
2113 | /* | |
2114 | * Check for nothing to do. | |
2115 | */ | |
2116 | if (count == 0) | |
2117 | return; | |
2118 | ||
2119 | /* | |
2120 | * Set up environment. | |
2121 | */ | |
69ef921b CH |
2122 | ASSERT(leaf_s->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
2123 | ASSERT(leaf_d->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); | |
1da177e4 LT |
2124 | hdr_s = &leaf_s->hdr; |
2125 | hdr_d = &leaf_d->hdr; | |
918ae424 NS |
2126 | ASSERT((be16_to_cpu(hdr_s->count) > 0) && |
2127 | (be16_to_cpu(hdr_s->count) < (XFS_LBSIZE(mp)/8))); | |
2128 | ASSERT(be16_to_cpu(hdr_s->firstused) >= | |
2129 | ((be16_to_cpu(hdr_s->count) | |
1da177e4 | 2130 | * sizeof(*entry_s))+sizeof(*hdr_s))); |
918ae424 NS |
2131 | ASSERT(be16_to_cpu(hdr_d->count) < (XFS_LBSIZE(mp)/8)); |
2132 | ASSERT(be16_to_cpu(hdr_d->firstused) >= | |
2133 | ((be16_to_cpu(hdr_d->count) | |
1da177e4 LT |
2134 | * sizeof(*entry_d))+sizeof(*hdr_d))); |
2135 | ||
918ae424 NS |
2136 | ASSERT(start_s < be16_to_cpu(hdr_s->count)); |
2137 | ASSERT(start_d <= be16_to_cpu(hdr_d->count)); | |
2138 | ASSERT(count <= be16_to_cpu(hdr_s->count)); | |
1da177e4 LT |
2139 | |
2140 | /* | |
2141 | * Move the entries in the destination leaf up to make a hole? | |
2142 | */ | |
918ae424 NS |
2143 | if (start_d < be16_to_cpu(hdr_d->count)) { |
2144 | tmp = be16_to_cpu(hdr_d->count) - start_d; | |
1da177e4 LT |
2145 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
2146 | entry_s = &leaf_d->entries[start_d]; | |
2147 | entry_d = &leaf_d->entries[start_d + count]; | |
2148 | memmove((char *)entry_d, (char *)entry_s, tmp); | |
2149 | } | |
2150 | ||
2151 | /* | |
2152 | * Copy all entry's in the same (sorted) order, | |
2153 | * but allocate attribute info packed and in sequence. | |
2154 | */ | |
2155 | entry_s = &leaf_s->entries[start_s]; | |
2156 | entry_d = &leaf_d->entries[start_d]; | |
2157 | desti = start_d; | |
2158 | for (i = 0; i < count; entry_s++, entry_d++, desti++, i++) { | |
6b19f2d8 | 2159 | ASSERT(be16_to_cpu(entry_s->nameidx) |
918ae424 | 2160 | >= be16_to_cpu(hdr_s->firstused)); |
1da177e4 LT |
2161 | tmp = xfs_attr_leaf_entsize(leaf_s, start_s + i); |
2162 | #ifdef GROT | |
2163 | /* | |
2164 | * Code to drop INCOMPLETE entries. Difficult to use as we | |
2165 | * may also need to change the insertion index. Code turned | |
2166 | * off for 6.2, should be revisited later. | |
2167 | */ | |
2168 | if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */ | |
c9fb86a9 | 2169 | memset(xfs_attr_leaf_name(leaf_s, start_s + i), 0, tmp); |
413d57c9 MS |
2170 | be16_add_cpu(&hdr_s->usedbytes, -tmp); |
2171 | be16_add_cpu(&hdr_s->count, -1); | |
1da177e4 LT |
2172 | entry_d--; /* to compensate for ++ in loop hdr */ |
2173 | desti--; | |
2174 | if ((start_s + i) < offset) | |
2175 | result++; /* insertion index adjustment */ | |
2176 | } else { | |
2177 | #endif /* GROT */ | |
413d57c9 | 2178 | be16_add_cpu(&hdr_d->firstused, -tmp); |
1da177e4 LT |
2179 | /* both on-disk, don't endian flip twice */ |
2180 | entry_d->hashval = entry_s->hashval; | |
2181 | /* both on-disk, don't endian flip twice */ | |
2182 | entry_d->nameidx = hdr_d->firstused; | |
2183 | entry_d->flags = entry_s->flags; | |
6b19f2d8 | 2184 | ASSERT(be16_to_cpu(entry_d->nameidx) + tmp |
1da177e4 | 2185 | <= XFS_LBSIZE(mp)); |
c9fb86a9 ES |
2186 | memmove(xfs_attr_leaf_name(leaf_d, desti), |
2187 | xfs_attr_leaf_name(leaf_s, start_s + i), tmp); | |
6b19f2d8 | 2188 | ASSERT(be16_to_cpu(entry_s->nameidx) + tmp |
1da177e4 | 2189 | <= XFS_LBSIZE(mp)); |
c9fb86a9 | 2190 | memset(xfs_attr_leaf_name(leaf_s, start_s + i), 0, tmp); |
413d57c9 MS |
2191 | be16_add_cpu(&hdr_s->usedbytes, -tmp); |
2192 | be16_add_cpu(&hdr_d->usedbytes, tmp); | |
2193 | be16_add_cpu(&hdr_s->count, -1); | |
2194 | be16_add_cpu(&hdr_d->count, 1); | |
918ae424 | 2195 | tmp = be16_to_cpu(hdr_d->count) |
1da177e4 LT |
2196 | * sizeof(xfs_attr_leaf_entry_t) |
2197 | + sizeof(xfs_attr_leaf_hdr_t); | |
918ae424 | 2198 | ASSERT(be16_to_cpu(hdr_d->firstused) >= tmp); |
1da177e4 LT |
2199 | #ifdef GROT |
2200 | } | |
2201 | #endif /* GROT */ | |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | * Zero out the entries we just copied. | |
2206 | */ | |
918ae424 | 2207 | if (start_s == be16_to_cpu(hdr_s->count)) { |
1da177e4 LT |
2208 | tmp = count * sizeof(xfs_attr_leaf_entry_t); |
2209 | entry_s = &leaf_s->entries[start_s]; | |
2210 | ASSERT(((char *)entry_s + tmp) <= | |
2211 | ((char *)leaf_s + XFS_LBSIZE(mp))); | |
2212 | memset((char *)entry_s, 0, tmp); | |
2213 | } else { | |
2214 | /* | |
2215 | * Move the remaining entries down to fill the hole, | |
2216 | * then zero the entries at the top. | |
2217 | */ | |
918ae424 | 2218 | tmp = be16_to_cpu(hdr_s->count) - count; |
1da177e4 LT |
2219 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
2220 | entry_s = &leaf_s->entries[start_s + count]; | |
2221 | entry_d = &leaf_s->entries[start_s]; | |
2222 | memmove((char *)entry_d, (char *)entry_s, tmp); | |
2223 | ||
2224 | tmp = count * sizeof(xfs_attr_leaf_entry_t); | |
918ae424 | 2225 | entry_s = &leaf_s->entries[be16_to_cpu(hdr_s->count)]; |
1da177e4 LT |
2226 | ASSERT(((char *)entry_s + tmp) <= |
2227 | ((char *)leaf_s + XFS_LBSIZE(mp))); | |
2228 | memset((char *)entry_s, 0, tmp); | |
2229 | } | |
2230 | ||
2231 | /* | |
2232 | * Fill in the freemap information | |
2233 | */ | |
918ae424 | 2234 | hdr_d->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t)); |
413d57c9 | 2235 | be16_add_cpu(&hdr_d->freemap[0].base, be16_to_cpu(hdr_d->count) * |
918ae424 NS |
2236 | sizeof(xfs_attr_leaf_entry_t)); |
2237 | hdr_d->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr_d->firstused) | |
2238 | - be16_to_cpu(hdr_d->freemap[0].base)); | |
1da177e4 LT |
2239 | hdr_d->freemap[1].base = 0; |
2240 | hdr_d->freemap[2].base = 0; | |
2241 | hdr_d->freemap[1].size = 0; | |
2242 | hdr_d->freemap[2].size = 0; | |
2243 | hdr_s->holes = 1; /* leaf may not be compact */ | |
2244 | } | |
2245 | ||
2246 | /* | |
2247 | * Compare two leaf blocks "order". | |
2248 | * Return 0 unless leaf2 should go before leaf1. | |
2249 | */ | |
2250 | int | |
2251 | xfs_attr_leaf_order(xfs_dabuf_t *leaf1_bp, xfs_dabuf_t *leaf2_bp) | |
2252 | { | |
2253 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
2254 | ||
2255 | leaf1 = leaf1_bp->data; | |
2256 | leaf2 = leaf2_bp->data; | |
69ef921b CH |
2257 | ASSERT((leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) && |
2258 | (leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC))); | |
918ae424 NS |
2259 | if ((be16_to_cpu(leaf1->hdr.count) > 0) && |
2260 | (be16_to_cpu(leaf2->hdr.count) > 0) && | |
6b19f2d8 NS |
2261 | ((be32_to_cpu(leaf2->entries[0].hashval) < |
2262 | be32_to_cpu(leaf1->entries[0].hashval)) || | |
2263 | (be32_to_cpu(leaf2->entries[ | |
2264 | be16_to_cpu(leaf2->hdr.count)-1].hashval) < | |
2265 | be32_to_cpu(leaf1->entries[ | |
2266 | be16_to_cpu(leaf1->hdr.count)-1].hashval)))) { | |
1da177e4 LT |
2267 | return(1); |
2268 | } | |
2269 | return(0); | |
2270 | } | |
2271 | ||
2272 | /* | |
2273 | * Pick up the last hashvalue from a leaf block. | |
2274 | */ | |
2275 | xfs_dahash_t | |
2276 | xfs_attr_leaf_lasthash(xfs_dabuf_t *bp, int *count) | |
2277 | { | |
2278 | xfs_attr_leafblock_t *leaf; | |
2279 | ||
2280 | leaf = bp->data; | |
69ef921b | 2281 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 | 2282 | if (count) |
918ae424 | 2283 | *count = be16_to_cpu(leaf->hdr.count); |
1da177e4 LT |
2284 | if (!leaf->hdr.count) |
2285 | return(0); | |
6b19f2d8 | 2286 | return be32_to_cpu(leaf->entries[be16_to_cpu(leaf->hdr.count)-1].hashval); |
1da177e4 LT |
2287 | } |
2288 | ||
2289 | /* | |
2290 | * Calculate the number of bytes used to store the indicated attribute | |
2291 | * (whether local or remote only calculate bytes in this block). | |
2292 | */ | |
ba0f32d4 | 2293 | STATIC int |
1da177e4 LT |
2294 | xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index) |
2295 | { | |
2296 | xfs_attr_leaf_name_local_t *name_loc; | |
2297 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2298 | int size; | |
2299 | ||
69ef921b | 2300 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 | 2301 | if (leaf->entries[index].flags & XFS_ATTR_LOCAL) { |
c9fb86a9 ES |
2302 | name_loc = xfs_attr_leaf_name_local(leaf, index); |
2303 | size = xfs_attr_leaf_entsize_local(name_loc->namelen, | |
053b5758 | 2304 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 | 2305 | } else { |
c9fb86a9 ES |
2306 | name_rmt = xfs_attr_leaf_name_remote(leaf, index); |
2307 | size = xfs_attr_leaf_entsize_remote(name_rmt->namelen); | |
1da177e4 LT |
2308 | } |
2309 | return(size); | |
2310 | } | |
2311 | ||
2312 | /* | |
2313 | * Calculate the number of bytes that would be required to store the new | |
2314 | * attribute (whether local or remote only calculate bytes in this block). | |
2315 | * This routine decides as a side effect whether the attribute will be | |
2316 | * a "local" or a "remote" attribute. | |
2317 | */ | |
2318 | int | |
aa82daa0 | 2319 | xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local) |
1da177e4 LT |
2320 | { |
2321 | int size; | |
2322 | ||
c9fb86a9 ES |
2323 | size = xfs_attr_leaf_entsize_local(namelen, valuelen); |
2324 | if (size < xfs_attr_leaf_entsize_local_max(blocksize)) { | |
1da177e4 LT |
2325 | if (local) { |
2326 | *local = 1; | |
2327 | } | |
2328 | } else { | |
c9fb86a9 | 2329 | size = xfs_attr_leaf_entsize_remote(namelen); |
1da177e4 LT |
2330 | if (local) { |
2331 | *local = 0; | |
2332 | } | |
2333 | } | |
2334 | return(size); | |
2335 | } | |
2336 | ||
2337 | /* | |
2338 | * Copy out attribute list entries for attr_list(), for leaf attribute lists. | |
2339 | */ | |
2340 | int | |
2341 | xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context) | |
2342 | { | |
2343 | attrlist_cursor_kern_t *cursor; | |
2344 | xfs_attr_leafblock_t *leaf; | |
2345 | xfs_attr_leaf_entry_t *entry; | |
1da177e4 LT |
2346 | int retval, i; |
2347 | ||
2348 | ASSERT(bp != NULL); | |
2349 | leaf = bp->data; | |
2350 | cursor = context->cursor; | |
2351 | cursor->initted = 1; | |
2352 | ||
0b1b213f | 2353 | trace_xfs_attr_list_leaf(context); |
1da177e4 LT |
2354 | |
2355 | /* | |
2356 | * Re-find our place in the leaf block if this is a new syscall. | |
2357 | */ | |
2358 | if (context->resynch) { | |
2359 | entry = &leaf->entries[0]; | |
918ae424 | 2360 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
6b19f2d8 | 2361 | if (be32_to_cpu(entry->hashval) == cursor->hashval) { |
1da177e4 LT |
2362 | if (cursor->offset == context->dupcnt) { |
2363 | context->dupcnt = 0; | |
2364 | break; | |
2365 | } | |
2366 | context->dupcnt++; | |
6b19f2d8 NS |
2367 | } else if (be32_to_cpu(entry->hashval) > |
2368 | cursor->hashval) { | |
1da177e4 LT |
2369 | context->dupcnt = 0; |
2370 | break; | |
2371 | } | |
2372 | } | |
918ae424 | 2373 | if (i == be16_to_cpu(leaf->hdr.count)) { |
0b1b213f | 2374 | trace_xfs_attr_list_notfound(context); |
1da177e4 LT |
2375 | return(0); |
2376 | } | |
2377 | } else { | |
2378 | entry = &leaf->entries[0]; | |
2379 | i = 0; | |
2380 | } | |
2381 | context->resynch = 0; | |
2382 | ||
2383 | /* | |
2384 | * We have found our place, start copying out the new attributes. | |
2385 | */ | |
2386 | retval = 0; | |
726801ba | 2387 | for ( ; (i < be16_to_cpu(leaf->hdr.count)); entry++, i++) { |
6b19f2d8 NS |
2388 | if (be32_to_cpu(entry->hashval) != cursor->hashval) { |
2389 | cursor->hashval = be32_to_cpu(entry->hashval); | |
1da177e4 LT |
2390 | cursor->offset = 0; |
2391 | } | |
2392 | ||
2393 | if (entry->flags & XFS_ATTR_INCOMPLETE) | |
2394 | continue; /* skip incomplete entries */ | |
1da177e4 LT |
2395 | |
2396 | if (entry->flags & XFS_ATTR_LOCAL) { | |
726801ba | 2397 | xfs_attr_leaf_name_local_t *name_loc = |
c9fb86a9 | 2398 | xfs_attr_leaf_name_local(leaf, i); |
726801ba TS |
2399 | |
2400 | retval = context->put_listent(context, | |
ad9b463a | 2401 | entry->flags, |
a9273ca5 | 2402 | name_loc->nameval, |
726801ba TS |
2403 | (int)name_loc->namelen, |
2404 | be16_to_cpu(name_loc->valuelen), | |
a9273ca5 | 2405 | &name_loc->nameval[name_loc->namelen]); |
726801ba TS |
2406 | if (retval) |
2407 | return retval; | |
1da177e4 | 2408 | } else { |
726801ba | 2409 | xfs_attr_leaf_name_remote_t *name_rmt = |
c9fb86a9 | 2410 | xfs_attr_leaf_name_remote(leaf, i); |
726801ba TS |
2411 | |
2412 | int valuelen = be32_to_cpu(name_rmt->valuelen); | |
2413 | ||
2414 | if (context->put_value) { | |
2415 | xfs_da_args_t args; | |
2416 | ||
2417 | memset((char *)&args, 0, sizeof(args)); | |
2418 | args.dp = context->dp; | |
2419 | args.whichfork = XFS_ATTR_FORK; | |
2420 | args.valuelen = valuelen; | |
622d8149 | 2421 | args.value = kmem_alloc(valuelen, KM_SLEEP | KM_NOFS); |
726801ba TS |
2422 | args.rmtblkno = be32_to_cpu(name_rmt->valueblk); |
2423 | args.rmtblkcnt = XFS_B_TO_FSB(args.dp->i_mount, valuelen); | |
2424 | retval = xfs_attr_rmtval_get(&args); | |
2425 | if (retval) | |
2426 | return retval; | |
2427 | retval = context->put_listent(context, | |
ad9b463a | 2428 | entry->flags, |
a9273ca5 | 2429 | name_rmt->name, |
726801ba TS |
2430 | (int)name_rmt->namelen, |
2431 | valuelen, | |
a9273ca5 | 2432 | args.value); |
f0e2d93c | 2433 | kmem_free(args.value); |
ad9b463a | 2434 | } else { |
726801ba | 2435 | retval = context->put_listent(context, |
ad9b463a | 2436 | entry->flags, |
a9273ca5 | 2437 | name_rmt->name, |
726801ba TS |
2438 | (int)name_rmt->namelen, |
2439 | valuelen, | |
2440 | NULL); | |
2441 | } | |
2442 | if (retval) | |
2443 | return retval; | |
1da177e4 | 2444 | } |
726801ba TS |
2445 | if (context->seen_enough) |
2446 | break; | |
2447 | cursor->offset++; | |
1da177e4 | 2448 | } |
0b1b213f | 2449 | trace_xfs_attr_list_leaf_end(context); |
1da177e4 LT |
2450 | return(retval); |
2451 | } | |
2452 | ||
1da177e4 LT |
2453 | |
2454 | /*======================================================================== | |
2455 | * Manage the INCOMPLETE flag in a leaf entry | |
2456 | *========================================================================*/ | |
2457 | ||
2458 | /* | |
2459 | * Clear the INCOMPLETE flag on an entry in a leaf block. | |
2460 | */ | |
2461 | int | |
2462 | xfs_attr_leaf_clearflag(xfs_da_args_t *args) | |
2463 | { | |
2464 | xfs_attr_leafblock_t *leaf; | |
2465 | xfs_attr_leaf_entry_t *entry; | |
2466 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2467 | xfs_dabuf_t *bp; | |
2468 | int error; | |
2469 | #ifdef DEBUG | |
2470 | xfs_attr_leaf_name_local_t *name_loc; | |
2471 | int namelen; | |
2472 | char *name; | |
2473 | #endif /* DEBUG */ | |
2474 | ||
5a5881cd | 2475 | trace_xfs_attr_leaf_clearflag(args); |
1da177e4 LT |
2476 | /* |
2477 | * Set up the operation. | |
2478 | */ | |
2479 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
2480 | XFS_ATTR_FORK); | |
2481 | if (error) { | |
2482 | return(error); | |
2483 | } | |
2484 | ASSERT(bp != NULL); | |
2485 | ||
2486 | leaf = bp->data; | |
69ef921b | 2487 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 | 2488 | ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); |
1da177e4 LT |
2489 | ASSERT(args->index >= 0); |
2490 | entry = &leaf->entries[ args->index ]; | |
2491 | ASSERT(entry->flags & XFS_ATTR_INCOMPLETE); | |
2492 | ||
2493 | #ifdef DEBUG | |
2494 | if (entry->flags & XFS_ATTR_LOCAL) { | |
c9fb86a9 | 2495 | name_loc = xfs_attr_leaf_name_local(leaf, args->index); |
1da177e4 LT |
2496 | namelen = name_loc->namelen; |
2497 | name = (char *)name_loc->nameval; | |
2498 | } else { | |
c9fb86a9 | 2499 | name_rmt = xfs_attr_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2500 | namelen = name_rmt->namelen; |
2501 | name = (char *)name_rmt->name; | |
2502 | } | |
6b19f2d8 | 2503 | ASSERT(be32_to_cpu(entry->hashval) == args->hashval); |
1da177e4 LT |
2504 | ASSERT(namelen == args->namelen); |
2505 | ASSERT(memcmp(name, args->name, namelen) == 0); | |
2506 | #endif /* DEBUG */ | |
2507 | ||
2508 | entry->flags &= ~XFS_ATTR_INCOMPLETE; | |
2509 | xfs_da_log_buf(args->trans, bp, | |
2510 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); | |
2511 | ||
2512 | if (args->rmtblkno) { | |
2513 | ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0); | |
c9fb86a9 | 2514 | name_rmt = xfs_attr_leaf_name_remote(leaf, args->index); |
c0f054e7 NS |
2515 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
2516 | name_rmt->valuelen = cpu_to_be32(args->valuelen); | |
1da177e4 LT |
2517 | xfs_da_log_buf(args->trans, bp, |
2518 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); | |
2519 | } | |
2520 | xfs_da_buf_done(bp); | |
2521 | ||
2522 | /* | |
2523 | * Commit the flag value change and start the next trans in series. | |
2524 | */ | |
322ff6b8 | 2525 | return xfs_trans_roll(&args->trans, args->dp); |
1da177e4 LT |
2526 | } |
2527 | ||
2528 | /* | |
2529 | * Set the INCOMPLETE flag on an entry in a leaf block. | |
2530 | */ | |
2531 | int | |
2532 | xfs_attr_leaf_setflag(xfs_da_args_t *args) | |
2533 | { | |
2534 | xfs_attr_leafblock_t *leaf; | |
2535 | xfs_attr_leaf_entry_t *entry; | |
2536 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2537 | xfs_dabuf_t *bp; | |
2538 | int error; | |
2539 | ||
5a5881cd DC |
2540 | trace_xfs_attr_leaf_setflag(args); |
2541 | ||
1da177e4 LT |
2542 | /* |
2543 | * Set up the operation. | |
2544 | */ | |
2545 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
2546 | XFS_ATTR_FORK); | |
2547 | if (error) { | |
2548 | return(error); | |
2549 | } | |
2550 | ASSERT(bp != NULL); | |
2551 | ||
2552 | leaf = bp->data; | |
69ef921b | 2553 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 | 2554 | ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); |
1da177e4 LT |
2555 | ASSERT(args->index >= 0); |
2556 | entry = &leaf->entries[ args->index ]; | |
2557 | ||
2558 | ASSERT((entry->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2559 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
2560 | xfs_da_log_buf(args->trans, bp, | |
2561 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); | |
2562 | if ((entry->flags & XFS_ATTR_LOCAL) == 0) { | |
c9fb86a9 | 2563 | name_rmt = xfs_attr_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2564 | name_rmt->valueblk = 0; |
2565 | name_rmt->valuelen = 0; | |
2566 | xfs_da_log_buf(args->trans, bp, | |
2567 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); | |
2568 | } | |
2569 | xfs_da_buf_done(bp); | |
2570 | ||
2571 | /* | |
2572 | * Commit the flag value change and start the next trans in series. | |
2573 | */ | |
322ff6b8 | 2574 | return xfs_trans_roll(&args->trans, args->dp); |
1da177e4 LT |
2575 | } |
2576 | ||
2577 | /* | |
2578 | * In a single transaction, clear the INCOMPLETE flag on the leaf entry | |
2579 | * given by args->blkno/index and set the INCOMPLETE flag on the leaf | |
2580 | * entry given by args->blkno2/index2. | |
2581 | * | |
2582 | * Note that they could be in different blocks, or in the same block. | |
2583 | */ | |
2584 | int | |
2585 | xfs_attr_leaf_flipflags(xfs_da_args_t *args) | |
2586 | { | |
2587 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
2588 | xfs_attr_leaf_entry_t *entry1, *entry2; | |
2589 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2590 | xfs_dabuf_t *bp1, *bp2; | |
2591 | int error; | |
2592 | #ifdef DEBUG | |
2593 | xfs_attr_leaf_name_local_t *name_loc; | |
2594 | int namelen1, namelen2; | |
2595 | char *name1, *name2; | |
2596 | #endif /* DEBUG */ | |
2597 | ||
5a5881cd DC |
2598 | trace_xfs_attr_leaf_flipflags(args); |
2599 | ||
1da177e4 LT |
2600 | /* |
2601 | * Read the block containing the "old" attr | |
2602 | */ | |
2603 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp1, | |
2604 | XFS_ATTR_FORK); | |
2605 | if (error) { | |
2606 | return(error); | |
2607 | } | |
2608 | ASSERT(bp1 != NULL); | |
2609 | ||
2610 | /* | |
2611 | * Read the block containing the "new" attr, if it is different | |
2612 | */ | |
2613 | if (args->blkno2 != args->blkno) { | |
2614 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno2, | |
2615 | -1, &bp2, XFS_ATTR_FORK); | |
2616 | if (error) { | |
2617 | return(error); | |
2618 | } | |
2619 | ASSERT(bp2 != NULL); | |
2620 | } else { | |
2621 | bp2 = bp1; | |
2622 | } | |
2623 | ||
2624 | leaf1 = bp1->data; | |
69ef921b | 2625 | ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 | 2626 | ASSERT(args->index < be16_to_cpu(leaf1->hdr.count)); |
1da177e4 LT |
2627 | ASSERT(args->index >= 0); |
2628 | entry1 = &leaf1->entries[ args->index ]; | |
2629 | ||
2630 | leaf2 = bp2->data; | |
69ef921b | 2631 | ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
918ae424 | 2632 | ASSERT(args->index2 < be16_to_cpu(leaf2->hdr.count)); |
1da177e4 LT |
2633 | ASSERT(args->index2 >= 0); |
2634 | entry2 = &leaf2->entries[ args->index2 ]; | |
2635 | ||
2636 | #ifdef DEBUG | |
2637 | if (entry1->flags & XFS_ATTR_LOCAL) { | |
c9fb86a9 | 2638 | name_loc = xfs_attr_leaf_name_local(leaf1, args->index); |
1da177e4 LT |
2639 | namelen1 = name_loc->namelen; |
2640 | name1 = (char *)name_loc->nameval; | |
2641 | } else { | |
c9fb86a9 | 2642 | name_rmt = xfs_attr_leaf_name_remote(leaf1, args->index); |
1da177e4 LT |
2643 | namelen1 = name_rmt->namelen; |
2644 | name1 = (char *)name_rmt->name; | |
2645 | } | |
2646 | if (entry2->flags & XFS_ATTR_LOCAL) { | |
c9fb86a9 | 2647 | name_loc = xfs_attr_leaf_name_local(leaf2, args->index2); |
1da177e4 LT |
2648 | namelen2 = name_loc->namelen; |
2649 | name2 = (char *)name_loc->nameval; | |
2650 | } else { | |
c9fb86a9 | 2651 | name_rmt = xfs_attr_leaf_name_remote(leaf2, args->index2); |
1da177e4 LT |
2652 | namelen2 = name_rmt->namelen; |
2653 | name2 = (char *)name_rmt->name; | |
2654 | } | |
6b19f2d8 | 2655 | ASSERT(be32_to_cpu(entry1->hashval) == be32_to_cpu(entry2->hashval)); |
1da177e4 LT |
2656 | ASSERT(namelen1 == namelen2); |
2657 | ASSERT(memcmp(name1, name2, namelen1) == 0); | |
2658 | #endif /* DEBUG */ | |
2659 | ||
2660 | ASSERT(entry1->flags & XFS_ATTR_INCOMPLETE); | |
2661 | ASSERT((entry2->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2662 | ||
2663 | entry1->flags &= ~XFS_ATTR_INCOMPLETE; | |
2664 | xfs_da_log_buf(args->trans, bp1, | |
2665 | XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1))); | |
2666 | if (args->rmtblkno) { | |
2667 | ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0); | |
c9fb86a9 | 2668 | name_rmt = xfs_attr_leaf_name_remote(leaf1, args->index); |
c0f054e7 NS |
2669 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
2670 | name_rmt->valuelen = cpu_to_be32(args->valuelen); | |
1da177e4 LT |
2671 | xfs_da_log_buf(args->trans, bp1, |
2672 | XFS_DA_LOGRANGE(leaf1, name_rmt, sizeof(*name_rmt))); | |
2673 | } | |
2674 | ||
2675 | entry2->flags |= XFS_ATTR_INCOMPLETE; | |
2676 | xfs_da_log_buf(args->trans, bp2, | |
2677 | XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2))); | |
2678 | if ((entry2->flags & XFS_ATTR_LOCAL) == 0) { | |
c9fb86a9 | 2679 | name_rmt = xfs_attr_leaf_name_remote(leaf2, args->index2); |
1da177e4 LT |
2680 | name_rmt->valueblk = 0; |
2681 | name_rmt->valuelen = 0; | |
2682 | xfs_da_log_buf(args->trans, bp2, | |
2683 | XFS_DA_LOGRANGE(leaf2, name_rmt, sizeof(*name_rmt))); | |
2684 | } | |
2685 | xfs_da_buf_done(bp1); | |
2686 | if (bp1 != bp2) | |
2687 | xfs_da_buf_done(bp2); | |
2688 | ||
2689 | /* | |
2690 | * Commit the flag value change and start the next trans in series. | |
2691 | */ | |
322ff6b8 | 2692 | error = xfs_trans_roll(&args->trans, args->dp); |
1da177e4 LT |
2693 | |
2694 | return(error); | |
2695 | } | |
2696 | ||
2697 | /*======================================================================== | |
2698 | * Indiscriminately delete the entire attribute fork | |
2699 | *========================================================================*/ | |
2700 | ||
2701 | /* | |
2702 | * Recurse (gasp!) through the attribute nodes until we find leaves. | |
2703 | * We're doing a depth-first traversal in order to invalidate everything. | |
2704 | */ | |
2705 | int | |
2706 | xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp) | |
2707 | { | |
2708 | xfs_da_blkinfo_t *info; | |
2709 | xfs_daddr_t blkno; | |
2710 | xfs_dabuf_t *bp; | |
2711 | int error; | |
2712 | ||
2713 | /* | |
2714 | * Read block 0 to see what we have to work with. | |
2715 | * We only get here if we have extents, since we remove | |
2716 | * the extents in reverse order the extent containing | |
2717 | * block 0 must still be there. | |
2718 | */ | |
2719 | error = xfs_da_read_buf(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK); | |
2720 | if (error) | |
2721 | return(error); | |
2722 | blkno = xfs_da_blkno(bp); | |
2723 | ||
2724 | /* | |
2725 | * Invalidate the tree, even if the "tree" is only a single leaf block. | |
2726 | * This is a depth-first traversal! | |
2727 | */ | |
2728 | info = bp->data; | |
69ef921b | 2729 | if (info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC)) { |
1da177e4 | 2730 | error = xfs_attr_node_inactive(trans, dp, bp, 1); |
69ef921b | 2731 | } else if (info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) { |
1da177e4 LT |
2732 | error = xfs_attr_leaf_inactive(trans, dp, bp); |
2733 | } else { | |
2734 | error = XFS_ERROR(EIO); | |
2735 | xfs_da_brelse(*trans, bp); | |
2736 | } | |
2737 | if (error) | |
2738 | return(error); | |
2739 | ||
2740 | /* | |
2741 | * Invalidate the incore copy of the root block. | |
2742 | */ | |
2743 | error = xfs_da_get_buf(*trans, dp, 0, blkno, &bp, XFS_ATTR_FORK); | |
2744 | if (error) | |
2745 | return(error); | |
2746 | xfs_da_binval(*trans, bp); /* remove from cache */ | |
2747 | /* | |
2748 | * Commit the invalidate and start the next transaction. | |
2749 | */ | |
322ff6b8 | 2750 | error = xfs_trans_roll(trans, dp); |
1da177e4 LT |
2751 | |
2752 | return (error); | |
2753 | } | |
2754 | ||
2755 | /* | |
2756 | * Recurse (gasp!) through the attribute nodes until we find leaves. | |
2757 | * We're doing a depth-first traversal in order to invalidate everything. | |
2758 | */ | |
ba0f32d4 | 2759 | STATIC int |
1da177e4 LT |
2760 | xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp, |
2761 | int level) | |
2762 | { | |
2763 | xfs_da_blkinfo_t *info; | |
2764 | xfs_da_intnode_t *node; | |
2765 | xfs_dablk_t child_fsb; | |
2766 | xfs_daddr_t parent_blkno, child_blkno; | |
2767 | int error, count, i; | |
2768 | xfs_dabuf_t *child_bp; | |
2769 | ||
2770 | /* | |
2771 | * Since this code is recursive (gasp!) we must protect ourselves. | |
2772 | */ | |
2773 | if (level > XFS_DA_NODE_MAXDEPTH) { | |
2774 | xfs_da_brelse(*trans, bp); /* no locks for later trans */ | |
2775 | return(XFS_ERROR(EIO)); | |
2776 | } | |
2777 | ||
2778 | node = bp->data; | |
69ef921b | 2779 | ASSERT(node->hdr.info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC)); |
1da177e4 | 2780 | parent_blkno = xfs_da_blkno(bp); /* save for re-read later */ |
fac80cce | 2781 | count = be16_to_cpu(node->hdr.count); |
1da177e4 LT |
2782 | if (!count) { |
2783 | xfs_da_brelse(*trans, bp); | |
2784 | return(0); | |
2785 | } | |
403432dc | 2786 | child_fsb = be32_to_cpu(node->btree[0].before); |
1da177e4 LT |
2787 | xfs_da_brelse(*trans, bp); /* no locks for later trans */ |
2788 | ||
2789 | /* | |
2790 | * If this is the node level just above the leaves, simply loop | |
2791 | * over the leaves removing all of them. If this is higher up | |
2792 | * in the tree, recurse downward. | |
2793 | */ | |
2794 | for (i = 0; i < count; i++) { | |
2795 | /* | |
2796 | * Read the subsidiary block to see what we have to work with. | |
2797 | * Don't do this in a transaction. This is a depth-first | |
2798 | * traversal of the tree so we may deal with many blocks | |
2799 | * before we come back to this one. | |
2800 | */ | |
2801 | error = xfs_da_read_buf(*trans, dp, child_fsb, -2, &child_bp, | |
2802 | XFS_ATTR_FORK); | |
2803 | if (error) | |
2804 | return(error); | |
2805 | if (child_bp) { | |
2806 | /* save for re-read later */ | |
2807 | child_blkno = xfs_da_blkno(child_bp); | |
2808 | ||
2809 | /* | |
2810 | * Invalidate the subtree, however we have to. | |
2811 | */ | |
2812 | info = child_bp->data; | |
69ef921b | 2813 | if (info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC)) { |
1da177e4 LT |
2814 | error = xfs_attr_node_inactive(trans, dp, |
2815 | child_bp, level+1); | |
69ef921b | 2816 | } else if (info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) { |
1da177e4 LT |
2817 | error = xfs_attr_leaf_inactive(trans, dp, |
2818 | child_bp); | |
2819 | } else { | |
2820 | error = XFS_ERROR(EIO); | |
2821 | xfs_da_brelse(*trans, child_bp); | |
2822 | } | |
2823 | if (error) | |
2824 | return(error); | |
2825 | ||
2826 | /* | |
2827 | * Remove the subsidiary block from the cache | |
2828 | * and from the log. | |
2829 | */ | |
2830 | error = xfs_da_get_buf(*trans, dp, 0, child_blkno, | |
2831 | &child_bp, XFS_ATTR_FORK); | |
2832 | if (error) | |
2833 | return(error); | |
2834 | xfs_da_binval(*trans, child_bp); | |
2835 | } | |
2836 | ||
2837 | /* | |
2838 | * If we're not done, re-read the parent to get the next | |
2839 | * child block number. | |
2840 | */ | |
2841 | if ((i+1) < count) { | |
2842 | error = xfs_da_read_buf(*trans, dp, 0, parent_blkno, | |
2843 | &bp, XFS_ATTR_FORK); | |
2844 | if (error) | |
2845 | return(error); | |
403432dc | 2846 | child_fsb = be32_to_cpu(node->btree[i+1].before); |
1da177e4 LT |
2847 | xfs_da_brelse(*trans, bp); |
2848 | } | |
2849 | /* | |
2850 | * Atomically commit the whole invalidate stuff. | |
2851 | */ | |
322ff6b8 NS |
2852 | error = xfs_trans_roll(trans, dp); |
2853 | if (error) | |
1da177e4 LT |
2854 | return (error); |
2855 | } | |
2856 | ||
2857 | return(0); | |
2858 | } | |
2859 | ||
2860 | /* | |
2861 | * Invalidate all of the "remote" value regions pointed to by a particular | |
2862 | * leaf block. | |
2863 | * Note that we must release the lock on the buffer so that we are not | |
2864 | * caught holding something that the logging code wants to flush to disk. | |
2865 | */ | |
ba0f32d4 | 2866 | STATIC int |
1da177e4 LT |
2867 | xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp) |
2868 | { | |
2869 | xfs_attr_leafblock_t *leaf; | |
2870 | xfs_attr_leaf_entry_t *entry; | |
2871 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2872 | xfs_attr_inactive_list_t *list, *lp; | |
2873 | int error, count, size, tmp, i; | |
2874 | ||
2875 | leaf = bp->data; | |
69ef921b | 2876 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
1da177e4 LT |
2877 | |
2878 | /* | |
2879 | * Count the number of "remote" value extents. | |
2880 | */ | |
2881 | count = 0; | |
2882 | entry = &leaf->entries[0]; | |
918ae424 | 2883 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
6b19f2d8 NS |
2884 | if (be16_to_cpu(entry->nameidx) && |
2885 | ((entry->flags & XFS_ATTR_LOCAL) == 0)) { | |
c9fb86a9 | 2886 | name_rmt = xfs_attr_leaf_name_remote(leaf, i); |
1da177e4 LT |
2887 | if (name_rmt->valueblk) |
2888 | count++; | |
2889 | } | |
2890 | } | |
2891 | ||
2892 | /* | |
2893 | * If there are no "remote" values, we're done. | |
2894 | */ | |
2895 | if (count == 0) { | |
2896 | xfs_da_brelse(*trans, bp); | |
2897 | return(0); | |
2898 | } | |
2899 | ||
2900 | /* | |
2901 | * Allocate storage for a list of all the "remote" value extents. | |
2902 | */ | |
2903 | size = count * sizeof(xfs_attr_inactive_list_t); | |
2904 | list = (xfs_attr_inactive_list_t *)kmem_alloc(size, KM_SLEEP); | |
2905 | ||
2906 | /* | |
2907 | * Identify each of the "remote" value extents. | |
2908 | */ | |
2909 | lp = list; | |
2910 | entry = &leaf->entries[0]; | |
918ae424 | 2911 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
6b19f2d8 NS |
2912 | if (be16_to_cpu(entry->nameidx) && |
2913 | ((entry->flags & XFS_ATTR_LOCAL) == 0)) { | |
c9fb86a9 | 2914 | name_rmt = xfs_attr_leaf_name_remote(leaf, i); |
1da177e4 | 2915 | if (name_rmt->valueblk) { |
d7929ff6 NS |
2916 | lp->valueblk = be32_to_cpu(name_rmt->valueblk); |
2917 | lp->valuelen = XFS_B_TO_FSB(dp->i_mount, | |
2918 | be32_to_cpu(name_rmt->valuelen)); | |
1da177e4 LT |
2919 | lp++; |
2920 | } | |
2921 | } | |
2922 | } | |
2923 | xfs_da_brelse(*trans, bp); /* unlock for trans. in freextent() */ | |
2924 | ||
2925 | /* | |
2926 | * Invalidate each of the "remote" value extents. | |
2927 | */ | |
2928 | error = 0; | |
2929 | for (lp = list, i = 0; i < count; i++, lp++) { | |
2930 | tmp = xfs_attr_leaf_freextent(trans, dp, | |
d7929ff6 NS |
2931 | lp->valueblk, lp->valuelen); |
2932 | ||
1da177e4 LT |
2933 | if (error == 0) |
2934 | error = tmp; /* save only the 1st errno */ | |
2935 | } | |
2936 | ||
f0e2d93c | 2937 | kmem_free((xfs_caddr_t)list); |
1da177e4 LT |
2938 | return(error); |
2939 | } | |
2940 | ||
2941 | /* | |
2942 | * Look at all the extents for this logical region, | |
2943 | * invalidate any buffers that are incore/in transactions. | |
2944 | */ | |
ba0f32d4 | 2945 | STATIC int |
1da177e4 LT |
2946 | xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp, |
2947 | xfs_dablk_t blkno, int blkcnt) | |
2948 | { | |
2949 | xfs_bmbt_irec_t map; | |
2950 | xfs_dablk_t tblkno; | |
2951 | int tblkcnt, dblkcnt, nmap, error; | |
2952 | xfs_daddr_t dblkno; | |
2953 | xfs_buf_t *bp; | |
2954 | ||
2955 | /* | |
2956 | * Roll through the "value", invalidating the attribute value's | |
2957 | * blocks. | |
2958 | */ | |
2959 | tblkno = blkno; | |
2960 | tblkcnt = blkcnt; | |
2961 | while (tblkcnt > 0) { | |
2962 | /* | |
2963 | * Try to remember where we decided to put the value. | |
2964 | */ | |
2965 | nmap = 1; | |
5c8ed202 DC |
2966 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)tblkno, tblkcnt, |
2967 | &map, &nmap, XFS_BMAPI_ATTRFORK); | |
1da177e4 LT |
2968 | if (error) { |
2969 | return(error); | |
2970 | } | |
2971 | ASSERT(nmap == 1); | |
2972 | ASSERT(map.br_startblock != DELAYSTARTBLOCK); | |
2973 | ||
2974 | /* | |
2975 | * If it's a hole, these are already unmapped | |
2976 | * so there's nothing to invalidate. | |
2977 | */ | |
2978 | if (map.br_startblock != HOLESTARTBLOCK) { | |
2979 | ||
2980 | dblkno = XFS_FSB_TO_DADDR(dp->i_mount, | |
2981 | map.br_startblock); | |
2982 | dblkcnt = XFS_FSB_TO_BB(dp->i_mount, | |
2983 | map.br_blockcount); | |
2984 | bp = xfs_trans_get_buf(*trans, | |
2985 | dp->i_mount->m_ddev_targp, | |
0cadda1c | 2986 | dblkno, dblkcnt, XBF_LOCK); |
2a30f36d CS |
2987 | if (!bp) |
2988 | return ENOMEM; | |
1da177e4 LT |
2989 | xfs_trans_binval(*trans, bp); |
2990 | /* | |
2991 | * Roll to next transaction. | |
2992 | */ | |
322ff6b8 NS |
2993 | error = xfs_trans_roll(trans, dp); |
2994 | if (error) | |
1da177e4 LT |
2995 | return (error); |
2996 | } | |
2997 | ||
2998 | tblkno += map.br_blockcount; | |
2999 | tblkcnt -= map.br_blockcount; | |
3000 | } | |
3001 | ||
3002 | return(0); | |
3003 | } |