]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
517c2220 | 3 | * Copyright (c) 2013 Red Hat, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 | 5 | * |
7b718769 NS |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
8 | * published by the Free Software Foundation. |
9 | * | |
7b718769 NS |
10 | * This program is distributed in the hope that it would be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
1da177e4 | 14 | * |
7b718769 NS |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 18 | */ |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
632b89e8 | 21 | #include "xfs_shared.h" |
a4fbe6ab | 22 | #include "xfs_format.h" |
239880ef DC |
23 | #include "xfs_log_format.h" |
24 | #include "xfs_trans_resv.h" | |
a844f451 | 25 | #include "xfs_bit.h" |
1da177e4 LT |
26 | #include "xfs_sb.h" |
27 | #include "xfs_ag.h" | |
1da177e4 | 28 | #include "xfs_mount.h" |
57062787 | 29 | #include "xfs_da_format.h" |
a844f451 | 30 | #include "xfs_da_btree.h" |
1da177e4 | 31 | #include "xfs_inode.h" |
239880ef | 32 | #include "xfs_trans.h" |
a844f451 | 33 | #include "xfs_inode_item.h" |
a4fbe6ab | 34 | #include "xfs_bmap_btree.h" |
1da177e4 | 35 | #include "xfs_bmap.h" |
a4fbe6ab DC |
36 | #include "xfs_attr_sf.h" |
37 | #include "xfs_attr_remote.h" | |
1da177e4 LT |
38 | #include "xfs_attr.h" |
39 | #include "xfs_attr_leaf.h" | |
40 | #include "xfs_error.h" | |
0b1b213f | 41 | #include "xfs_trace.h" |
517c2220 DC |
42 | #include "xfs_buf_item.h" |
43 | #include "xfs_cksum.h" | |
a4fbe6ab | 44 | #include "xfs_dinode.h" |
4bceb18f | 45 | #include "xfs_dir2.h" |
517c2220 | 46 | |
1da177e4 LT |
47 | |
48 | /* | |
49 | * xfs_attr_leaf.c | |
50 | * | |
51 | * Routines to implement leaf blocks of attributes as Btrees of hashed names. | |
52 | */ | |
53 | ||
54 | /*======================================================================== | |
55 | * Function prototypes for the kernel. | |
56 | *========================================================================*/ | |
57 | ||
58 | /* | |
59 | * Routines used for growing the Btree. | |
60 | */ | |
517c2220 DC |
61 | STATIC int xfs_attr3_leaf_create(struct xfs_da_args *args, |
62 | xfs_dablk_t which_block, struct xfs_buf **bpp); | |
63 | STATIC int xfs_attr3_leaf_add_work(struct xfs_buf *leaf_buffer, | |
64 | struct xfs_attr3_icleaf_hdr *ichdr, | |
65 | struct xfs_da_args *args, int freemap_index); | |
66 | STATIC void xfs_attr3_leaf_compact(struct xfs_da_args *args, | |
67 | struct xfs_attr3_icleaf_hdr *ichdr, | |
68 | struct xfs_buf *leaf_buffer); | |
69 | STATIC void xfs_attr3_leaf_rebalance(xfs_da_state_t *state, | |
1da177e4 LT |
70 | xfs_da_state_blk_t *blk1, |
71 | xfs_da_state_blk_t *blk2); | |
517c2220 DC |
72 | STATIC int xfs_attr3_leaf_figure_balance(xfs_da_state_t *state, |
73 | xfs_da_state_blk_t *leaf_blk_1, | |
74 | struct xfs_attr3_icleaf_hdr *ichdr1, | |
75 | xfs_da_state_blk_t *leaf_blk_2, | |
76 | struct xfs_attr3_icleaf_hdr *ichdr2, | |
77 | int *number_entries_in_blk1, | |
78 | int *number_usedbytes_in_blk1); | |
1da177e4 LT |
79 | |
80 | /* | |
81 | * Utility routines. | |
82 | */ | |
c2c4c477 DC |
83 | STATIC void xfs_attr3_leaf_moveents(struct xfs_da_args *args, |
84 | struct xfs_attr_leafblock *src_leaf, | |
517c2220 DC |
85 | struct xfs_attr3_icleaf_hdr *src_ichdr, int src_start, |
86 | struct xfs_attr_leafblock *dst_leaf, | |
87 | struct xfs_attr3_icleaf_hdr *dst_ichdr, int dst_start, | |
c2c4c477 | 88 | int move_count); |
ba0f32d4 | 89 | STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index); |
726801ba | 90 | |
517c2220 DC |
91 | void |
92 | xfs_attr3_leaf_hdr_from_disk( | |
93 | struct xfs_attr3_icleaf_hdr *to, | |
94 | struct xfs_attr_leafblock *from) | |
95 | { | |
96 | int i; | |
97 | ||
98 | ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC) || | |
99 | from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)); | |
100 | ||
101 | if (from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)) { | |
102 | struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)from; | |
103 | ||
104 | to->forw = be32_to_cpu(hdr3->info.hdr.forw); | |
105 | to->back = be32_to_cpu(hdr3->info.hdr.back); | |
106 | to->magic = be16_to_cpu(hdr3->info.hdr.magic); | |
107 | to->count = be16_to_cpu(hdr3->count); | |
108 | to->usedbytes = be16_to_cpu(hdr3->usedbytes); | |
109 | to->firstused = be16_to_cpu(hdr3->firstused); | |
110 | to->holes = hdr3->holes; | |
111 | ||
112 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
113 | to->freemap[i].base = be16_to_cpu(hdr3->freemap[i].base); | |
114 | to->freemap[i].size = be16_to_cpu(hdr3->freemap[i].size); | |
115 | } | |
116 | return; | |
117 | } | |
118 | to->forw = be32_to_cpu(from->hdr.info.forw); | |
119 | to->back = be32_to_cpu(from->hdr.info.back); | |
120 | to->magic = be16_to_cpu(from->hdr.info.magic); | |
121 | to->count = be16_to_cpu(from->hdr.count); | |
122 | to->usedbytes = be16_to_cpu(from->hdr.usedbytes); | |
123 | to->firstused = be16_to_cpu(from->hdr.firstused); | |
124 | to->holes = from->hdr.holes; | |
125 | ||
126 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
127 | to->freemap[i].base = be16_to_cpu(from->hdr.freemap[i].base); | |
128 | to->freemap[i].size = be16_to_cpu(from->hdr.freemap[i].size); | |
129 | } | |
130 | } | |
131 | ||
132 | void | |
133 | xfs_attr3_leaf_hdr_to_disk( | |
134 | struct xfs_attr_leafblock *to, | |
135 | struct xfs_attr3_icleaf_hdr *from) | |
136 | { | |
137 | int i; | |
138 | ||
139 | ASSERT(from->magic == XFS_ATTR_LEAF_MAGIC || | |
140 | from->magic == XFS_ATTR3_LEAF_MAGIC); | |
141 | ||
142 | if (from->magic == XFS_ATTR3_LEAF_MAGIC) { | |
143 | struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)to; | |
144 | ||
145 | hdr3->info.hdr.forw = cpu_to_be32(from->forw); | |
146 | hdr3->info.hdr.back = cpu_to_be32(from->back); | |
147 | hdr3->info.hdr.magic = cpu_to_be16(from->magic); | |
148 | hdr3->count = cpu_to_be16(from->count); | |
149 | hdr3->usedbytes = cpu_to_be16(from->usedbytes); | |
150 | hdr3->firstused = cpu_to_be16(from->firstused); | |
151 | hdr3->holes = from->holes; | |
152 | hdr3->pad1 = 0; | |
153 | ||
154 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
155 | hdr3->freemap[i].base = cpu_to_be16(from->freemap[i].base); | |
156 | hdr3->freemap[i].size = cpu_to_be16(from->freemap[i].size); | |
157 | } | |
158 | return; | |
159 | } | |
160 | to->hdr.info.forw = cpu_to_be32(from->forw); | |
161 | to->hdr.info.back = cpu_to_be32(from->back); | |
162 | to->hdr.info.magic = cpu_to_be16(from->magic); | |
163 | to->hdr.count = cpu_to_be16(from->count); | |
164 | to->hdr.usedbytes = cpu_to_be16(from->usedbytes); | |
165 | to->hdr.firstused = cpu_to_be16(from->firstused); | |
166 | to->hdr.holes = from->holes; | |
167 | to->hdr.pad1 = 0; | |
168 | ||
169 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
170 | to->hdr.freemap[i].base = cpu_to_be16(from->freemap[i].base); | |
171 | to->hdr.freemap[i].size = cpu_to_be16(from->freemap[i].size); | |
172 | } | |
173 | } | |
174 | ||
175 | static bool | |
176 | xfs_attr3_leaf_verify( | |
ad14c33a DC |
177 | struct xfs_buf *bp) |
178 | { | |
179 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
517c2220 DC |
180 | struct xfs_attr_leafblock *leaf = bp->b_addr; |
181 | struct xfs_attr3_icleaf_hdr ichdr; | |
ad14c33a | 182 | |
517c2220 DC |
183 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
184 | ||
185 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
186 | struct xfs_da3_node_hdr *hdr3 = bp->b_addr; | |
187 | ||
188 | if (ichdr.magic != XFS_ATTR3_LEAF_MAGIC) | |
189 | return false; | |
190 | ||
191 | if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_uuid)) | |
192 | return false; | |
193 | if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn) | |
194 | return false; | |
195 | } else { | |
196 | if (ichdr.magic != XFS_ATTR_LEAF_MAGIC) | |
197 | return false; | |
ad14c33a | 198 | } |
517c2220 DC |
199 | if (ichdr.count == 0) |
200 | return false; | |
201 | ||
202 | /* XXX: need to range check rest of attr header values */ | |
203 | /* XXX: hash order check? */ | |
204 | ||
205 | return true; | |
612cfbfe DC |
206 | } |
207 | ||
208 | static void | |
517c2220 | 209 | xfs_attr3_leaf_write_verify( |
612cfbfe DC |
210 | struct xfs_buf *bp) |
211 | { | |
517c2220 DC |
212 | struct xfs_mount *mp = bp->b_target->bt_mount; |
213 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
214 | struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr; | |
215 | ||
216 | if (!xfs_attr3_leaf_verify(bp)) { | |
517c2220 | 217 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
ce5028cf | 218 | xfs_verifier_error(bp); |
517c2220 DC |
219 | return; |
220 | } | |
221 | ||
222 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
223 | return; | |
224 | ||
225 | if (bip) | |
226 | hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
227 | ||
f1dbcd7e | 228 | xfs_buf_update_cksum(bp, XFS_ATTR3_LEAF_CRC_OFF); |
612cfbfe | 229 | } |
ad14c33a | 230 | |
517c2220 DC |
231 | /* |
232 | * leaf/node format detection on trees is sketchy, so a node read can be done on | |
233 | * leaf level blocks when detection identifies the tree as a node format tree | |
234 | * incorrectly. In this case, we need to swap the verifier to match the correct | |
235 | * format of the block being read. | |
236 | */ | |
1813dd64 | 237 | static void |
517c2220 DC |
238 | xfs_attr3_leaf_read_verify( |
239 | struct xfs_buf *bp) | |
612cfbfe | 240 | { |
517c2220 DC |
241 | struct xfs_mount *mp = bp->b_target->bt_mount; |
242 | ||
ce5028cf ES |
243 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
244 | !xfs_buf_verify_cksum(bp, XFS_ATTR3_LEAF_CRC_OFF)) | |
245 | xfs_buf_ioerror(bp, EFSBADCRC); | |
246 | else if (!xfs_attr3_leaf_verify(bp)) | |
517c2220 | 247 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
ce5028cf ES |
248 | |
249 | if (bp->b_error) | |
250 | xfs_verifier_error(bp); | |
ad14c33a DC |
251 | } |
252 | ||
517c2220 DC |
253 | const struct xfs_buf_ops xfs_attr3_leaf_buf_ops = { |
254 | .verify_read = xfs_attr3_leaf_read_verify, | |
255 | .verify_write = xfs_attr3_leaf_write_verify, | |
1813dd64 | 256 | }; |
612cfbfe | 257 | |
ad14c33a | 258 | int |
517c2220 | 259 | xfs_attr3_leaf_read( |
ad14c33a DC |
260 | struct xfs_trans *tp, |
261 | struct xfs_inode *dp, | |
262 | xfs_dablk_t bno, | |
263 | xfs_daddr_t mappedbno, | |
264 | struct xfs_buf **bpp) | |
265 | { | |
d75afeb3 DC |
266 | int err; |
267 | ||
268 | err = xfs_da_read_buf(tp, dp, bno, mappedbno, bpp, | |
517c2220 | 269 | XFS_ATTR_FORK, &xfs_attr3_leaf_buf_ops); |
d75afeb3 | 270 | if (!err && tp) |
61fe135c | 271 | xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_ATTR_LEAF_BUF); |
d75afeb3 | 272 | return err; |
ad14c33a DC |
273 | } |
274 | ||
726801ba TS |
275 | /*======================================================================== |
276 | * Namespace helper routines | |
277 | *========================================================================*/ | |
278 | ||
726801ba TS |
279 | /* |
280 | * If namespace bits don't match return 0. | |
281 | * If all match then return 1. | |
282 | */ | |
b8f82a4a | 283 | STATIC int |
726801ba TS |
284 | xfs_attr_namesp_match(int arg_flags, int ondisk_flags) |
285 | { | |
286 | return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags); | |
287 | } | |
288 | ||
1da177e4 LT |
289 | |
290 | /*======================================================================== | |
d8cc890d | 291 | * External routines when attribute fork size < XFS_LITINO(mp). |
1da177e4 LT |
292 | *========================================================================*/ |
293 | ||
294 | /* | |
d8cc890d NS |
295 | * Query whether the requested number of additional bytes of extended |
296 | * attribute space will be able to fit inline. | |
4c393a60 | 297 | * |
d8cc890d NS |
298 | * Returns zero if not, else the di_forkoff fork offset to be used in the |
299 | * literal area for attribute data once the new bytes have been added. | |
300 | * | |
301 | * di_forkoff must be 8 byte aligned, hence is stored as a >>3 value; | |
302 | * special case for dev/uuid inodes, they have fixed size data forks. | |
1da177e4 LT |
303 | */ |
304 | int | |
d8cc890d NS |
305 | xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes) |
306 | { | |
307 | int offset; | |
308 | int minforkoff; /* lower limit on valid forkoff locations */ | |
309 | int maxforkoff; /* upper limit on valid forkoff locations */ | |
4c393a60 | 310 | int dsize; |
d8cc890d NS |
311 | xfs_mount_t *mp = dp->i_mount; |
312 | ||
56cea2d0 CH |
313 | /* rounded down */ |
314 | offset = (XFS_LITINO(mp, dp->i_d.di_version) - bytes) >> 3; | |
d8cc890d NS |
315 | |
316 | switch (dp->i_d.di_format) { | |
317 | case XFS_DINODE_FMT_DEV: | |
318 | minforkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
319 | return (offset >= minforkoff) ? minforkoff : 0; | |
320 | case XFS_DINODE_FMT_UUID: | |
321 | minforkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
322 | return (offset >= minforkoff) ? minforkoff : 0; | |
323 | } | |
324 | ||
4c393a60 CH |
325 | /* |
326 | * If the requested numbers of bytes is smaller or equal to the | |
327 | * current attribute fork size we can always proceed. | |
328 | * | |
329 | * Note that if_bytes in the data fork might actually be larger than | |
330 | * the current data fork size is due to delalloc extents. In that | |
331 | * case either the extent count will go down when they are converted | |
332 | * to real extents, or the delalloc conversion will take care of the | |
333 | * literal area rebalancing. | |
334 | */ | |
335 | if (bytes <= XFS_IFORK_ASIZE(dp)) | |
336 | return dp->i_d.di_forkoff; | |
337 | ||
338 | /* | |
339 | * For attr2 we can try to move the forkoff if there is space in the | |
340 | * literal area, but for the old format we are done if there is no | |
341 | * space in the fixed attribute fork. | |
342 | */ | |
343 | if (!(mp->m_flags & XFS_MOUNT_ATTR2)) | |
da087bad | 344 | return 0; |
da087bad | 345 | |
e5889e90 | 346 | dsize = dp->i_df.if_bytes; |
4c393a60 | 347 | |
e5889e90 BN |
348 | switch (dp->i_d.di_format) { |
349 | case XFS_DINODE_FMT_EXTENTS: | |
4c393a60 | 350 | /* |
e5889e90 | 351 | * If there is no attr fork and the data fork is extents, |
4c393a60 CH |
352 | * determine if creating the default attr fork will result |
353 | * in the extents form migrating to btree. If so, the | |
354 | * minimum offset only needs to be the space required for | |
e5889e90 | 355 | * the btree root. |
4c393a60 | 356 | */ |
1a5902c5 CH |
357 | if (!dp->i_d.di_forkoff && dp->i_df.if_bytes > |
358 | xfs_default_attroffset(dp)) | |
e5889e90 BN |
359 | dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS); |
360 | break; | |
e5889e90 BN |
361 | case XFS_DINODE_FMT_BTREE: |
362 | /* | |
4c393a60 CH |
363 | * If we have a data btree then keep forkoff if we have one, |
364 | * otherwise we are adding a new attr, so then we set | |
365 | * minforkoff to where the btree root can finish so we have | |
e5889e90 BN |
366 | * plenty of room for attrs |
367 | */ | |
368 | if (dp->i_d.di_forkoff) { | |
4c393a60 | 369 | if (offset < dp->i_d.di_forkoff) |
e5889e90 | 370 | return 0; |
4c393a60 CH |
371 | return dp->i_d.di_forkoff; |
372 | } | |
ee1a47ab | 373 | dsize = XFS_BMAP_BROOT_SPACE(mp, dp->i_df.if_broot); |
e5889e90 BN |
374 | break; |
375 | } | |
4c393a60 CH |
376 | |
377 | /* | |
378 | * A data fork btree root must have space for at least | |
e5889e90 BN |
379 | * MINDBTPTRS key/ptr pairs if the data fork is small or empty. |
380 | */ | |
381 | minforkoff = MAX(dsize, XFS_BMDR_SPACE_CALC(MINDBTPTRS)); | |
d8cc890d NS |
382 | minforkoff = roundup(minforkoff, 8) >> 3; |
383 | ||
384 | /* attr fork btree root can have at least this many key/ptr pairs */ | |
56cea2d0 CH |
385 | maxforkoff = XFS_LITINO(mp, dp->i_d.di_version) - |
386 | XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
d8cc890d NS |
387 | maxforkoff = maxforkoff >> 3; /* rounded down */ |
388 | ||
d8cc890d NS |
389 | if (offset >= maxforkoff) |
390 | return maxforkoff; | |
4c393a60 CH |
391 | if (offset >= minforkoff) |
392 | return offset; | |
d8cc890d NS |
393 | return 0; |
394 | } | |
395 | ||
396 | /* | |
397 | * Switch on the ATTR2 superblock bit (implies also FEATURES2) | |
398 | */ | |
399 | STATIC void | |
400 | xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp) | |
401 | { | |
13059ff0 | 402 | if ((mp->m_flags & XFS_MOUNT_ATTR2) && |
62118709 | 403 | !(xfs_sb_version_hasattr2(&mp->m_sb))) { |
3685c2a1 | 404 | spin_lock(&mp->m_sb_lock); |
62118709 ES |
405 | if (!xfs_sb_version_hasattr2(&mp->m_sb)) { |
406 | xfs_sb_version_addattr2(&mp->m_sb); | |
3685c2a1 | 407 | spin_unlock(&mp->m_sb_lock); |
d8cc890d NS |
408 | xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); |
409 | } else | |
3685c2a1 | 410 | spin_unlock(&mp->m_sb_lock); |
d8cc890d NS |
411 | } |
412 | } | |
413 | ||
414 | /* | |
415 | * Create the initial contents of a shortform attribute list. | |
416 | */ | |
417 | void | |
1da177e4 LT |
418 | xfs_attr_shortform_create(xfs_da_args_t *args) |
419 | { | |
420 | xfs_attr_sf_hdr_t *hdr; | |
421 | xfs_inode_t *dp; | |
422 | xfs_ifork_t *ifp; | |
423 | ||
5a5881cd DC |
424 | trace_xfs_attr_sf_create(args); |
425 | ||
1da177e4 LT |
426 | dp = args->dp; |
427 | ASSERT(dp != NULL); | |
428 | ifp = dp->i_afp; | |
429 | ASSERT(ifp != NULL); | |
430 | ASSERT(ifp->if_bytes == 0); | |
431 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) { | |
432 | ifp->if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
433 | dp->i_d.di_aformat = XFS_DINODE_FMT_LOCAL; | |
434 | ifp->if_flags |= XFS_IFINLINE; | |
435 | } else { | |
436 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
437 | } | |
438 | xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK); | |
439 | hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data; | |
440 | hdr->count = 0; | |
3b244aa8 | 441 | hdr->totsize = cpu_to_be16(sizeof(*hdr)); |
1da177e4 | 442 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
1da177e4 LT |
443 | } |
444 | ||
445 | /* | |
446 | * Add a name/value pair to the shortform attribute list. | |
447 | * Overflow from the inode has already been checked for. | |
448 | */ | |
d8cc890d NS |
449 | void |
450 | xfs_attr_shortform_add(xfs_da_args_t *args, int forkoff) | |
1da177e4 LT |
451 | { |
452 | xfs_attr_shortform_t *sf; | |
453 | xfs_attr_sf_entry_t *sfe; | |
454 | int i, offset, size; | |
d8cc890d | 455 | xfs_mount_t *mp; |
1da177e4 LT |
456 | xfs_inode_t *dp; |
457 | xfs_ifork_t *ifp; | |
458 | ||
5a5881cd DC |
459 | trace_xfs_attr_sf_add(args); |
460 | ||
1da177e4 | 461 | dp = args->dp; |
d8cc890d NS |
462 | mp = dp->i_mount; |
463 | dp->i_d.di_forkoff = forkoff; | |
d8cc890d | 464 | |
1da177e4 LT |
465 | ifp = dp->i_afp; |
466 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
467 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
468 | sfe = &sf->list[0]; | |
3b244aa8 | 469 | for (i = 0; i < sf->hdr.count; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
d8cc890d | 470 | #ifdef DEBUG |
1da177e4 LT |
471 | if (sfe->namelen != args->namelen) |
472 | continue; | |
473 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
474 | continue; | |
726801ba | 475 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 | 476 | continue; |
d8cc890d NS |
477 | ASSERT(0); |
478 | #endif | |
1da177e4 LT |
479 | } |
480 | ||
481 | offset = (char *)sfe - (char *)sf; | |
482 | size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); | |
483 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); | |
484 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
485 | sfe = (xfs_attr_sf_entry_t *)((char *)sf + offset); | |
486 | ||
487 | sfe->namelen = args->namelen; | |
3b244aa8 | 488 | sfe->valuelen = args->valuelen; |
726801ba | 489 | sfe->flags = XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
1da177e4 LT |
490 | memcpy(sfe->nameval, args->name, args->namelen); |
491 | memcpy(&sfe->nameval[args->namelen], args->value, args->valuelen); | |
3b244aa8 | 492 | sf->hdr.count++; |
413d57c9 | 493 | be16_add_cpu(&sf->hdr.totsize, size); |
1da177e4 LT |
494 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
495 | ||
d8cc890d | 496 | xfs_sbversion_add_attr2(mp, args->trans); |
1da177e4 LT |
497 | } |
498 | ||
e1486dea CH |
499 | /* |
500 | * After the last attribute is removed revert to original inode format, | |
501 | * making all literal area available to the data fork once more. | |
502 | */ | |
503 | STATIC void | |
504 | xfs_attr_fork_reset( | |
505 | struct xfs_inode *ip, | |
506 | struct xfs_trans *tp) | |
507 | { | |
508 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
509 | ip->i_d.di_forkoff = 0; | |
510 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
511 | ||
512 | ASSERT(ip->i_d.di_anextents == 0); | |
513 | ASSERT(ip->i_afp == NULL); | |
514 | ||
e1486dea CH |
515 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
516 | } | |
517 | ||
1da177e4 | 518 | /* |
d8cc890d | 519 | * Remove an attribute from the shortform attribute list structure. |
1da177e4 LT |
520 | */ |
521 | int | |
522 | xfs_attr_shortform_remove(xfs_da_args_t *args) | |
523 | { | |
524 | xfs_attr_shortform_t *sf; | |
525 | xfs_attr_sf_entry_t *sfe; | |
526 | int base, size=0, end, totsize, i; | |
d8cc890d | 527 | xfs_mount_t *mp; |
1da177e4 LT |
528 | xfs_inode_t *dp; |
529 | ||
5a5881cd DC |
530 | trace_xfs_attr_sf_remove(args); |
531 | ||
1da177e4 | 532 | dp = args->dp; |
d8cc890d | 533 | mp = dp->i_mount; |
1da177e4 LT |
534 | base = sizeof(xfs_attr_sf_hdr_t); |
535 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; | |
536 | sfe = &sf->list[0]; | |
3b244aa8 | 537 | end = sf->hdr.count; |
d8cc890d | 538 | for (i = 0; i < end; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), |
1da177e4 LT |
539 | base += size, i++) { |
540 | size = XFS_ATTR_SF_ENTSIZE(sfe); | |
541 | if (sfe->namelen != args->namelen) | |
542 | continue; | |
543 | if (memcmp(sfe->nameval, args->name, args->namelen) != 0) | |
544 | continue; | |
726801ba | 545 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
546 | continue; |
547 | break; | |
548 | } | |
d8cc890d | 549 | if (i == end) |
b474c7ae | 550 | return ENOATTR; |
1da177e4 | 551 | |
d8cc890d NS |
552 | /* |
553 | * Fix up the attribute fork data, covering the hole | |
554 | */ | |
1da177e4 | 555 | end = base + size; |
3b244aa8 | 556 | totsize = be16_to_cpu(sf->hdr.totsize); |
d8cc890d NS |
557 | if (end != totsize) |
558 | memmove(&((char *)sf)[base], &((char *)sf)[end], totsize - end); | |
3b244aa8 | 559 | sf->hdr.count--; |
413d57c9 | 560 | be16_add_cpu(&sf->hdr.totsize, -size); |
d8cc890d NS |
561 | |
562 | /* | |
563 | * Fix up the start offset of the attribute fork | |
564 | */ | |
565 | totsize -= size; | |
6a178100 | 566 | if (totsize == sizeof(xfs_attr_sf_hdr_t) && |
e1486dea CH |
567 | (mp->m_flags & XFS_MOUNT_ATTR2) && |
568 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
569 | !(args->op_flags & XFS_DA_OP_ADDNAME)) { | |
570 | xfs_attr_fork_reset(dp, args->trans); | |
d8cc890d NS |
571 | } else { |
572 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
573 | dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize); | |
574 | ASSERT(dp->i_d.di_forkoff); | |
6a178100 BN |
575 | ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) || |
576 | (args->op_flags & XFS_DA_OP_ADDNAME) || | |
577 | !(mp->m_flags & XFS_MOUNT_ATTR2) || | |
578 | dp->i_d.di_format == XFS_DINODE_FMT_BTREE); | |
d8cc890d NS |
579 | xfs_trans_log_inode(args->trans, dp, |
580 | XFS_ILOG_CORE | XFS_ILOG_ADATA); | |
581 | } | |
582 | ||
583 | xfs_sbversion_add_attr2(mp, args->trans); | |
1da177e4 | 584 | |
d99831ff | 585 | return 0; |
1da177e4 LT |
586 | } |
587 | ||
588 | /* | |
589 | * Look up a name in a shortform attribute list structure. | |
590 | */ | |
591 | /*ARGSUSED*/ | |
592 | int | |
593 | xfs_attr_shortform_lookup(xfs_da_args_t *args) | |
594 | { | |
595 | xfs_attr_shortform_t *sf; | |
596 | xfs_attr_sf_entry_t *sfe; | |
597 | int i; | |
598 | xfs_ifork_t *ifp; | |
599 | ||
5a5881cd DC |
600 | trace_xfs_attr_sf_lookup(args); |
601 | ||
1da177e4 LT |
602 | ifp = args->dp->i_afp; |
603 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
604 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
605 | sfe = &sf->list[0]; | |
3b244aa8 | 606 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
607 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
608 | if (sfe->namelen != args->namelen) | |
609 | continue; | |
610 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
611 | continue; | |
726801ba | 612 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 | 613 | continue; |
b474c7ae | 614 | return EEXIST; |
1da177e4 | 615 | } |
b474c7ae | 616 | return ENOATTR; |
1da177e4 LT |
617 | } |
618 | ||
619 | /* | |
620 | * Look up a name in a shortform attribute list structure. | |
621 | */ | |
622 | /*ARGSUSED*/ | |
623 | int | |
624 | xfs_attr_shortform_getvalue(xfs_da_args_t *args) | |
625 | { | |
626 | xfs_attr_shortform_t *sf; | |
627 | xfs_attr_sf_entry_t *sfe; | |
628 | int i; | |
629 | ||
914ed44b | 630 | ASSERT(args->dp->i_afp->if_flags == XFS_IFINLINE); |
1da177e4 LT |
631 | sf = (xfs_attr_shortform_t *)args->dp->i_afp->if_u1.if_data; |
632 | sfe = &sf->list[0]; | |
3b244aa8 | 633 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
634 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
635 | if (sfe->namelen != args->namelen) | |
636 | continue; | |
637 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
638 | continue; | |
726801ba | 639 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
640 | continue; |
641 | if (args->flags & ATTR_KERNOVAL) { | |
3b244aa8 | 642 | args->valuelen = sfe->valuelen; |
b474c7ae | 643 | return EEXIST; |
1da177e4 | 644 | } |
3b244aa8 NS |
645 | if (args->valuelen < sfe->valuelen) { |
646 | args->valuelen = sfe->valuelen; | |
b474c7ae | 647 | return ERANGE; |
1da177e4 | 648 | } |
3b244aa8 | 649 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
650 | memcpy(args->value, &sfe->nameval[args->namelen], |
651 | args->valuelen); | |
b474c7ae | 652 | return EEXIST; |
1da177e4 | 653 | } |
b474c7ae | 654 | return ENOATTR; |
1da177e4 LT |
655 | } |
656 | ||
657 | /* | |
658 | * Convert from using the shortform to the leaf. | |
659 | */ | |
660 | int | |
661 | xfs_attr_shortform_to_leaf(xfs_da_args_t *args) | |
662 | { | |
663 | xfs_inode_t *dp; | |
664 | xfs_attr_shortform_t *sf; | |
665 | xfs_attr_sf_entry_t *sfe; | |
666 | xfs_da_args_t nargs; | |
667 | char *tmpbuffer; | |
668 | int error, i, size; | |
669 | xfs_dablk_t blkno; | |
1d9025e5 | 670 | struct xfs_buf *bp; |
1da177e4 LT |
671 | xfs_ifork_t *ifp; |
672 | ||
5a5881cd DC |
673 | trace_xfs_attr_sf_to_leaf(args); |
674 | ||
1da177e4 LT |
675 | dp = args->dp; |
676 | ifp = dp->i_afp; | |
677 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
3b244aa8 | 678 | size = be16_to_cpu(sf->hdr.totsize); |
1da177e4 LT |
679 | tmpbuffer = kmem_alloc(size, KM_SLEEP); |
680 | ASSERT(tmpbuffer != NULL); | |
681 | memcpy(tmpbuffer, ifp->if_u1.if_data, size); | |
682 | sf = (xfs_attr_shortform_t *)tmpbuffer; | |
683 | ||
684 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
f3508bcd DC |
685 | xfs_bmap_local_to_extents_empty(dp, XFS_ATTR_FORK); |
686 | ||
1da177e4 LT |
687 | bp = NULL; |
688 | error = xfs_da_grow_inode(args, &blkno); | |
689 | if (error) { | |
690 | /* | |
691 | * If we hit an IO error middle of the transaction inside | |
692 | * grow_inode(), we may have inconsistent data. Bail out. | |
693 | */ | |
694 | if (error == EIO) | |
695 | goto out; | |
696 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
697 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
698 | goto out; | |
699 | } | |
700 | ||
701 | ASSERT(blkno == 0); | |
517c2220 | 702 | error = xfs_attr3_leaf_create(args, blkno, &bp); |
1da177e4 LT |
703 | if (error) { |
704 | error = xfs_da_shrink_inode(args, 0, bp); | |
705 | bp = NULL; | |
706 | if (error) | |
707 | goto out; | |
708 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
709 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
710 | goto out; | |
711 | } | |
712 | ||
713 | memset((char *)&nargs, 0, sizeof(nargs)); | |
714 | nargs.dp = dp; | |
0650b554 | 715 | nargs.geo = args->geo; |
1da177e4 LT |
716 | nargs.firstblock = args->firstblock; |
717 | nargs.flist = args->flist; | |
718 | nargs.total = args->total; | |
719 | nargs.whichfork = XFS_ATTR_FORK; | |
720 | nargs.trans = args->trans; | |
6a178100 | 721 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
1da177e4 LT |
722 | |
723 | sfe = &sf->list[0]; | |
3b244aa8 | 724 | for (i = 0; i < sf->hdr.count; i++) { |
a9273ca5 | 725 | nargs.name = sfe->nameval; |
1da177e4 | 726 | nargs.namelen = sfe->namelen; |
a9273ca5 | 727 | nargs.value = &sfe->nameval[nargs.namelen]; |
3b244aa8 | 728 | nargs.valuelen = sfe->valuelen; |
a9273ca5 | 729 | nargs.hashval = xfs_da_hashname(sfe->nameval, |
1da177e4 | 730 | sfe->namelen); |
726801ba | 731 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags); |
517c2220 | 732 | error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */ |
1da177e4 | 733 | ASSERT(error == ENOATTR); |
517c2220 | 734 | error = xfs_attr3_leaf_add(bp, &nargs); |
1da177e4 LT |
735 | ASSERT(error != ENOSPC); |
736 | if (error) | |
737 | goto out; | |
738 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
739 | } | |
740 | error = 0; | |
741 | ||
742 | out: | |
f0e2d93c | 743 | kmem_free(tmpbuffer); |
d99831ff | 744 | return error; |
1da177e4 LT |
745 | } |
746 | ||
1da177e4 LT |
747 | /* |
748 | * Check a leaf attribute block to see if all the entries would fit into | |
749 | * a shortform attribute list. | |
750 | */ | |
751 | int | |
1d9025e5 | 752 | xfs_attr_shortform_allfit( |
b38958d7 DC |
753 | struct xfs_buf *bp, |
754 | struct xfs_inode *dp) | |
1da177e4 | 755 | { |
b38958d7 DC |
756 | struct xfs_attr_leafblock *leaf; |
757 | struct xfs_attr_leaf_entry *entry; | |
1da177e4 | 758 | xfs_attr_leaf_name_local_t *name_loc; |
b38958d7 DC |
759 | struct xfs_attr3_icleaf_hdr leafhdr; |
760 | int bytes; | |
761 | int i; | |
1da177e4 | 762 | |
1d9025e5 | 763 | leaf = bp->b_addr; |
b38958d7 DC |
764 | xfs_attr3_leaf_hdr_from_disk(&leafhdr, leaf); |
765 | entry = xfs_attr3_leaf_entryp(leaf); | |
1da177e4 | 766 | |
1da177e4 | 767 | bytes = sizeof(struct xfs_attr_sf_hdr); |
b38958d7 | 768 | for (i = 0; i < leafhdr.count; entry++, i++) { |
1da177e4 LT |
769 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
770 | continue; /* don't copy partial entries */ | |
771 | if (!(entry->flags & XFS_ATTR_LOCAL)) | |
d99831ff | 772 | return 0; |
517c2220 | 773 | name_loc = xfs_attr3_leaf_name_local(leaf, i); |
1da177e4 | 774 | if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
d99831ff | 775 | return 0; |
053b5758 | 776 | if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX) |
d99831ff | 777 | return 0; |
b38958d7 | 778 | bytes += sizeof(struct xfs_attr_sf_entry) - 1 |
1da177e4 | 779 | + name_loc->namelen |
053b5758 | 780 | + be16_to_cpu(name_loc->valuelen); |
1da177e4 | 781 | } |
13059ff0 | 782 | if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) && |
e5889e90 | 783 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
e0144ca5 | 784 | (bytes == sizeof(struct xfs_attr_sf_hdr))) |
b38958d7 DC |
785 | return -1; |
786 | return xfs_attr_shortform_bytesfit(dp, bytes); | |
1da177e4 LT |
787 | } |
788 | ||
789 | /* | |
790 | * Convert a leaf attribute list to shortform attribute list | |
791 | */ | |
792 | int | |
517c2220 DC |
793 | xfs_attr3_leaf_to_shortform( |
794 | struct xfs_buf *bp, | |
795 | struct xfs_da_args *args, | |
796 | int forkoff) | |
1da177e4 | 797 | { |
517c2220 DC |
798 | struct xfs_attr_leafblock *leaf; |
799 | struct xfs_attr3_icleaf_hdr ichdr; | |
800 | struct xfs_attr_leaf_entry *entry; | |
801 | struct xfs_attr_leaf_name_local *name_loc; | |
802 | struct xfs_da_args nargs; | |
803 | struct xfs_inode *dp = args->dp; | |
804 | char *tmpbuffer; | |
805 | int error; | |
806 | int i; | |
1da177e4 | 807 | |
5a5881cd DC |
808 | trace_xfs_attr_leaf_to_sf(args); |
809 | ||
c2c4c477 | 810 | tmpbuffer = kmem_alloc(args->geo->blksize, KM_SLEEP); |
517c2220 DC |
811 | if (!tmpbuffer) |
812 | return ENOMEM; | |
1da177e4 | 813 | |
c2c4c477 | 814 | memcpy(tmpbuffer, bp->b_addr, args->geo->blksize); |
517c2220 | 815 | |
1da177e4 | 816 | leaf = (xfs_attr_leafblock_t *)tmpbuffer; |
517c2220 DC |
817 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
818 | entry = xfs_attr3_leaf_entryp(leaf); | |
819 | ||
820 | /* XXX (dgc): buffer is about to be marked stale - why zero it? */ | |
c2c4c477 | 821 | memset(bp->b_addr, 0, args->geo->blksize); |
1da177e4 LT |
822 | |
823 | /* | |
824 | * Clean out the prior contents of the attribute list. | |
825 | */ | |
826 | error = xfs_da_shrink_inode(args, 0, bp); | |
827 | if (error) | |
828 | goto out; | |
d8cc890d NS |
829 | |
830 | if (forkoff == -1) { | |
13059ff0 | 831 | ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2); |
e5889e90 | 832 | ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE); |
e1486dea | 833 | xfs_attr_fork_reset(dp, args->trans); |
1da177e4 | 834 | goto out; |
d8cc890d NS |
835 | } |
836 | ||
837 | xfs_attr_shortform_create(args); | |
1da177e4 LT |
838 | |
839 | /* | |
840 | * Copy the attributes | |
841 | */ | |
842 | memset((char *)&nargs, 0, sizeof(nargs)); | |
0650b554 | 843 | nargs.geo = args->geo; |
1da177e4 LT |
844 | nargs.dp = dp; |
845 | nargs.firstblock = args->firstblock; | |
846 | nargs.flist = args->flist; | |
847 | nargs.total = args->total; | |
848 | nargs.whichfork = XFS_ATTR_FORK; | |
849 | nargs.trans = args->trans; | |
6a178100 | 850 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
517c2220 DC |
851 | |
852 | for (i = 0; i < ichdr.count; entry++, i++) { | |
1da177e4 LT |
853 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
854 | continue; /* don't copy partial entries */ | |
855 | if (!entry->nameidx) | |
856 | continue; | |
857 | ASSERT(entry->flags & XFS_ATTR_LOCAL); | |
517c2220 | 858 | name_loc = xfs_attr3_leaf_name_local(leaf, i); |
a9273ca5 | 859 | nargs.name = name_loc->nameval; |
1da177e4 | 860 | nargs.namelen = name_loc->namelen; |
a9273ca5 | 861 | nargs.value = &name_loc->nameval[nargs.namelen]; |
053b5758 | 862 | nargs.valuelen = be16_to_cpu(name_loc->valuelen); |
6b19f2d8 | 863 | nargs.hashval = be32_to_cpu(entry->hashval); |
726801ba | 864 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(entry->flags); |
d8cc890d | 865 | xfs_attr_shortform_add(&nargs, forkoff); |
1da177e4 LT |
866 | } |
867 | error = 0; | |
868 | ||
869 | out: | |
f0e2d93c | 870 | kmem_free(tmpbuffer); |
517c2220 | 871 | return error; |
1da177e4 LT |
872 | } |
873 | ||
874 | /* | |
875 | * Convert from using a single leaf to a root node and a leaf. | |
876 | */ | |
877 | int | |
517c2220 DC |
878 | xfs_attr3_leaf_to_node( |
879 | struct xfs_da_args *args) | |
1da177e4 | 880 | { |
517c2220 DC |
881 | struct xfs_attr_leafblock *leaf; |
882 | struct xfs_attr3_icleaf_hdr icleafhdr; | |
883 | struct xfs_attr_leaf_entry *entries; | |
f5ea1100 | 884 | struct xfs_da_node_entry *btree; |
517c2220 DC |
885 | struct xfs_da3_icnode_hdr icnodehdr; |
886 | struct xfs_da_intnode *node; | |
887 | struct xfs_inode *dp = args->dp; | |
888 | struct xfs_mount *mp = dp->i_mount; | |
889 | struct xfs_buf *bp1 = NULL; | |
890 | struct xfs_buf *bp2 = NULL; | |
891 | xfs_dablk_t blkno; | |
892 | int error; | |
1da177e4 | 893 | |
5a5881cd DC |
894 | trace_xfs_attr_leaf_to_node(args); |
895 | ||
1da177e4 LT |
896 | error = xfs_da_grow_inode(args, &blkno); |
897 | if (error) | |
898 | goto out; | |
517c2220 | 899 | error = xfs_attr3_leaf_read(args->trans, dp, 0, -1, &bp1); |
1da177e4 LT |
900 | if (error) |
901 | goto out; | |
ad14c33a | 902 | |
517c2220 | 903 | error = xfs_da_get_buf(args->trans, dp, blkno, -1, &bp2, XFS_ATTR_FORK); |
1da177e4 LT |
904 | if (error) |
905 | goto out; | |
517c2220 DC |
906 | |
907 | /* copy leaf to new buffer, update identifiers */ | |
61fe135c | 908 | xfs_trans_buf_set_type(args->trans, bp2, XFS_BLFT_ATTR_LEAF_BUF); |
1813dd64 | 909 | bp2->b_ops = bp1->b_ops; |
c2c4c477 | 910 | memcpy(bp2->b_addr, bp1->b_addr, args->geo->blksize); |
517c2220 DC |
911 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
912 | struct xfs_da3_blkinfo *hdr3 = bp2->b_addr; | |
913 | hdr3->blkno = cpu_to_be64(bp2->b_bn); | |
914 | } | |
c2c4c477 | 915 | xfs_trans_log_buf(args->trans, bp2, 0, args->geo->blksize - 1); |
1da177e4 LT |
916 | |
917 | /* | |
918 | * Set up the new root node. | |
919 | */ | |
f5ea1100 | 920 | error = xfs_da3_node_create(args, 0, 1, &bp1, XFS_ATTR_FORK); |
1da177e4 LT |
921 | if (error) |
922 | goto out; | |
1d9025e5 | 923 | node = bp1->b_addr; |
01ba43b8 | 924 | dp->d_ops->node_hdr_from_disk(&icnodehdr, node); |
4bceb18f | 925 | btree = dp->d_ops->node_tree_p(node); |
517c2220 | 926 | |
1d9025e5 | 927 | leaf = bp2->b_addr; |
517c2220 DC |
928 | xfs_attr3_leaf_hdr_from_disk(&icleafhdr, leaf); |
929 | entries = xfs_attr3_leaf_entryp(leaf); | |
930 | ||
1da177e4 | 931 | /* both on-disk, don't endian-flip twice */ |
517c2220 | 932 | btree[0].hashval = entries[icleafhdr.count - 1].hashval; |
f5ea1100 | 933 | btree[0].before = cpu_to_be32(blkno); |
517c2220 | 934 | icnodehdr.count = 1; |
01ba43b8 | 935 | dp->d_ops->node_hdr_to_disk(node, &icnodehdr); |
c2c4c477 | 936 | xfs_trans_log_buf(args->trans, bp1, 0, args->geo->blksize - 1); |
1da177e4 LT |
937 | error = 0; |
938 | out: | |
517c2220 | 939 | return error; |
1da177e4 LT |
940 | } |
941 | ||
1da177e4 LT |
942 | /*======================================================================== |
943 | * Routines used for growing the Btree. | |
944 | *========================================================================*/ | |
945 | ||
946 | /* | |
947 | * Create the initial contents of a leaf attribute list | |
948 | * or a leaf in a node attribute list. | |
949 | */ | |
ba0f32d4 | 950 | STATIC int |
517c2220 DC |
951 | xfs_attr3_leaf_create( |
952 | struct xfs_da_args *args, | |
953 | xfs_dablk_t blkno, | |
954 | struct xfs_buf **bpp) | |
1da177e4 | 955 | { |
517c2220 DC |
956 | struct xfs_attr_leafblock *leaf; |
957 | struct xfs_attr3_icleaf_hdr ichdr; | |
958 | struct xfs_inode *dp = args->dp; | |
959 | struct xfs_mount *mp = dp->i_mount; | |
960 | struct xfs_buf *bp; | |
961 | int error; | |
1da177e4 | 962 | |
5a5881cd DC |
963 | trace_xfs_attr_leaf_create(args); |
964 | ||
1da177e4 LT |
965 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp, |
966 | XFS_ATTR_FORK); | |
967 | if (error) | |
517c2220 DC |
968 | return error; |
969 | bp->b_ops = &xfs_attr3_leaf_buf_ops; | |
61fe135c | 970 | xfs_trans_buf_set_type(args->trans, bp, XFS_BLFT_ATTR_LEAF_BUF); |
1d9025e5 | 971 | leaf = bp->b_addr; |
c2c4c477 | 972 | memset(leaf, 0, args->geo->blksize); |
517c2220 DC |
973 | |
974 | memset(&ichdr, 0, sizeof(ichdr)); | |
c2c4c477 | 975 | ichdr.firstused = args->geo->blksize; |
517c2220 DC |
976 | |
977 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
978 | struct xfs_da3_blkinfo *hdr3 = bp->b_addr; | |
979 | ||
980 | ichdr.magic = XFS_ATTR3_LEAF_MAGIC; | |
981 | ||
982 | hdr3->blkno = cpu_to_be64(bp->b_bn); | |
983 | hdr3->owner = cpu_to_be64(dp->i_ino); | |
984 | uuid_copy(&hdr3->uuid, &mp->m_sb.sb_uuid); | |
1da177e4 | 985 | |
517c2220 DC |
986 | ichdr.freemap[0].base = sizeof(struct xfs_attr3_leaf_hdr); |
987 | } else { | |
988 | ichdr.magic = XFS_ATTR_LEAF_MAGIC; | |
989 | ichdr.freemap[0].base = sizeof(struct xfs_attr_leaf_hdr); | |
990 | } | |
991 | ichdr.freemap[0].size = ichdr.firstused - ichdr.freemap[0].base; | |
1da177e4 | 992 | |
517c2220 | 993 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
c2c4c477 | 994 | xfs_trans_log_buf(args->trans, bp, 0, args->geo->blksize - 1); |
1da177e4 LT |
995 | |
996 | *bpp = bp; | |
517c2220 | 997 | return 0; |
1da177e4 LT |
998 | } |
999 | ||
1000 | /* | |
1001 | * Split the leaf node, rebalance, then add the new entry. | |
1002 | */ | |
1003 | int | |
517c2220 DC |
1004 | xfs_attr3_leaf_split( |
1005 | struct xfs_da_state *state, | |
1006 | struct xfs_da_state_blk *oldblk, | |
1007 | struct xfs_da_state_blk *newblk) | |
1da177e4 LT |
1008 | { |
1009 | xfs_dablk_t blkno; | |
1010 | int error; | |
1011 | ||
5a5881cd DC |
1012 | trace_xfs_attr_leaf_split(state->args); |
1013 | ||
1da177e4 LT |
1014 | /* |
1015 | * Allocate space for a new leaf node. | |
1016 | */ | |
1017 | ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC); | |
1018 | error = xfs_da_grow_inode(state->args, &blkno); | |
1019 | if (error) | |
d99831ff | 1020 | return error; |
517c2220 | 1021 | error = xfs_attr3_leaf_create(state->args, blkno, &newblk->bp); |
1da177e4 | 1022 | if (error) |
d99831ff | 1023 | return error; |
1da177e4 LT |
1024 | newblk->blkno = blkno; |
1025 | newblk->magic = XFS_ATTR_LEAF_MAGIC; | |
1026 | ||
1027 | /* | |
1028 | * Rebalance the entries across the two leaves. | |
1029 | * NOTE: rebalance() currently depends on the 2nd block being empty. | |
1030 | */ | |
517c2220 | 1031 | xfs_attr3_leaf_rebalance(state, oldblk, newblk); |
f5ea1100 | 1032 | error = xfs_da3_blk_link(state, oldblk, newblk); |
1da177e4 | 1033 | if (error) |
d99831ff | 1034 | return error; |
1da177e4 LT |
1035 | |
1036 | /* | |
1037 | * Save info on "old" attribute for "atomic rename" ops, leaf_add() | |
1038 | * modifies the index/blkno/rmtblk/rmtblkcnt fields to show the | |
1039 | * "new" attrs info. Will need the "old" info to remove it later. | |
1040 | * | |
1041 | * Insert the "new" entry in the correct block. | |
1042 | */ | |
5a5881cd DC |
1043 | if (state->inleaf) { |
1044 | trace_xfs_attr_leaf_add_old(state->args); | |
517c2220 | 1045 | error = xfs_attr3_leaf_add(oldblk->bp, state->args); |
5a5881cd DC |
1046 | } else { |
1047 | trace_xfs_attr_leaf_add_new(state->args); | |
517c2220 | 1048 | error = xfs_attr3_leaf_add(newblk->bp, state->args); |
5a5881cd | 1049 | } |
1da177e4 LT |
1050 | |
1051 | /* | |
1052 | * Update last hashval in each block since we added the name. | |
1053 | */ | |
1054 | oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL); | |
1055 | newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL); | |
d99831ff | 1056 | return error; |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | /* | |
1060 | * Add a name to the leaf attribute list structure. | |
1061 | */ | |
1062 | int | |
517c2220 | 1063 | xfs_attr3_leaf_add( |
1d9025e5 DC |
1064 | struct xfs_buf *bp, |
1065 | struct xfs_da_args *args) | |
1da177e4 | 1066 | { |
517c2220 DC |
1067 | struct xfs_attr_leafblock *leaf; |
1068 | struct xfs_attr3_icleaf_hdr ichdr; | |
1069 | int tablesize; | |
1070 | int entsize; | |
1071 | int sum; | |
1072 | int tmp; | |
1073 | int i; | |
1da177e4 | 1074 | |
5a5881cd DC |
1075 | trace_xfs_attr_leaf_add(args); |
1076 | ||
1d9025e5 | 1077 | leaf = bp->b_addr; |
517c2220 DC |
1078 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
1079 | ASSERT(args->index >= 0 && args->index <= ichdr.count); | |
c59f0ad2 | 1080 | entsize = xfs_attr_leaf_newentsize(args, NULL); |
1da177e4 LT |
1081 | |
1082 | /* | |
1083 | * Search through freemap for first-fit on new name length. | |
1084 | * (may need to figure in size of entry struct too) | |
1085 | */ | |
517c2220 DC |
1086 | tablesize = (ichdr.count + 1) * sizeof(xfs_attr_leaf_entry_t) |
1087 | + xfs_attr3_leaf_hdr_size(leaf); | |
1088 | for (sum = 0, i = XFS_ATTR_LEAF_MAPSIZE - 1; i >= 0; i--) { | |
1089 | if (tablesize > ichdr.firstused) { | |
1090 | sum += ichdr.freemap[i].size; | |
1da177e4 LT |
1091 | continue; |
1092 | } | |
517c2220 | 1093 | if (!ichdr.freemap[i].size) |
1da177e4 LT |
1094 | continue; /* no space in this map */ |
1095 | tmp = entsize; | |
517c2220 | 1096 | if (ichdr.freemap[i].base < ichdr.firstused) |
1da177e4 | 1097 | tmp += sizeof(xfs_attr_leaf_entry_t); |
517c2220 DC |
1098 | if (ichdr.freemap[i].size >= tmp) { |
1099 | tmp = xfs_attr3_leaf_add_work(bp, &ichdr, args, i); | |
1100 | goto out_log_hdr; | |
1da177e4 | 1101 | } |
517c2220 | 1102 | sum += ichdr.freemap[i].size; |
1da177e4 LT |
1103 | } |
1104 | ||
1105 | /* | |
1106 | * If there are no holes in the address space of the block, | |
1107 | * and we don't have enough freespace, then compaction will do us | |
1108 | * no good and we should just give up. | |
1109 | */ | |
517c2220 | 1110 | if (!ichdr.holes && sum < entsize) |
b474c7ae | 1111 | return ENOSPC; |
1da177e4 LT |
1112 | |
1113 | /* | |
1114 | * Compact the entries to coalesce free space. | |
1115 | * This may change the hdr->count via dropping INCOMPLETE entries. | |
1116 | */ | |
517c2220 | 1117 | xfs_attr3_leaf_compact(args, &ichdr, bp); |
1da177e4 LT |
1118 | |
1119 | /* | |
1120 | * After compaction, the block is guaranteed to have only one | |
1121 | * free region, in freemap[0]. If it is not big enough, give up. | |
1122 | */ | |
517c2220 DC |
1123 | if (ichdr.freemap[0].size < (entsize + sizeof(xfs_attr_leaf_entry_t))) { |
1124 | tmp = ENOSPC; | |
1125 | goto out_log_hdr; | |
1126 | } | |
1127 | ||
1128 | tmp = xfs_attr3_leaf_add_work(bp, &ichdr, args, 0); | |
1da177e4 | 1129 | |
517c2220 DC |
1130 | out_log_hdr: |
1131 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); | |
1132 | xfs_trans_log_buf(args->trans, bp, | |
1133 | XFS_DA_LOGRANGE(leaf, &leaf->hdr, | |
1134 | xfs_attr3_leaf_hdr_size(leaf))); | |
1135 | return tmp; | |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | /* | |
1139 | * Add a name to a leaf attribute list structure. | |
1140 | */ | |
1141 | STATIC int | |
517c2220 DC |
1142 | xfs_attr3_leaf_add_work( |
1143 | struct xfs_buf *bp, | |
1144 | struct xfs_attr3_icleaf_hdr *ichdr, | |
1145 | struct xfs_da_args *args, | |
1146 | int mapindex) | |
1da177e4 | 1147 | { |
517c2220 DC |
1148 | struct xfs_attr_leafblock *leaf; |
1149 | struct xfs_attr_leaf_entry *entry; | |
1150 | struct xfs_attr_leaf_name_local *name_loc; | |
1151 | struct xfs_attr_leaf_name_remote *name_rmt; | |
1152 | struct xfs_mount *mp; | |
1153 | int tmp; | |
1154 | int i; | |
1da177e4 | 1155 | |
ee73259b DC |
1156 | trace_xfs_attr_leaf_add_work(args); |
1157 | ||
1d9025e5 | 1158 | leaf = bp->b_addr; |
517c2220 DC |
1159 | ASSERT(mapindex >= 0 && mapindex < XFS_ATTR_LEAF_MAPSIZE); |
1160 | ASSERT(args->index >= 0 && args->index <= ichdr->count); | |
1da177e4 LT |
1161 | |
1162 | /* | |
1163 | * Force open some space in the entry array and fill it in. | |
1164 | */ | |
517c2220 DC |
1165 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
1166 | if (args->index < ichdr->count) { | |
1167 | tmp = ichdr->count - args->index; | |
1da177e4 | 1168 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
517c2220 | 1169 | memmove(entry + 1, entry, tmp); |
1d9025e5 | 1170 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
1171 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); |
1172 | } | |
517c2220 | 1173 | ichdr->count++; |
1da177e4 LT |
1174 | |
1175 | /* | |
1176 | * Allocate space for the new string (at the end of the run). | |
1177 | */ | |
1da177e4 | 1178 | mp = args->trans->t_mountp; |
c2c4c477 | 1179 | ASSERT(ichdr->freemap[mapindex].base < args->geo->blksize); |
517c2220 DC |
1180 | ASSERT((ichdr->freemap[mapindex].base & 0x3) == 0); |
1181 | ASSERT(ichdr->freemap[mapindex].size >= | |
c59f0ad2 | 1182 | xfs_attr_leaf_newentsize(args, NULL)); |
c2c4c477 | 1183 | ASSERT(ichdr->freemap[mapindex].size < args->geo->blksize); |
517c2220 DC |
1184 | ASSERT((ichdr->freemap[mapindex].size & 0x3) == 0); |
1185 | ||
c59f0ad2 | 1186 | ichdr->freemap[mapindex].size -= xfs_attr_leaf_newentsize(args, &tmp); |
517c2220 DC |
1187 | |
1188 | entry->nameidx = cpu_to_be16(ichdr->freemap[mapindex].base + | |
1189 | ichdr->freemap[mapindex].size); | |
6b19f2d8 | 1190 | entry->hashval = cpu_to_be32(args->hashval); |
1da177e4 | 1191 | entry->flags = tmp ? XFS_ATTR_LOCAL : 0; |
726801ba | 1192 | entry->flags |= XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
6a178100 | 1193 | if (args->op_flags & XFS_DA_OP_RENAME) { |
1da177e4 LT |
1194 | entry->flags |= XFS_ATTR_INCOMPLETE; |
1195 | if ((args->blkno2 == args->blkno) && | |
1196 | (args->index2 <= args->index)) { | |
1197 | args->index2++; | |
1198 | } | |
1199 | } | |
1d9025e5 | 1200 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 | 1201 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
6b19f2d8 NS |
1202 | ASSERT((args->index == 0) || |
1203 | (be32_to_cpu(entry->hashval) >= be32_to_cpu((entry-1)->hashval))); | |
517c2220 | 1204 | ASSERT((args->index == ichdr->count - 1) || |
6b19f2d8 | 1205 | (be32_to_cpu(entry->hashval) <= be32_to_cpu((entry+1)->hashval))); |
1da177e4 LT |
1206 | |
1207 | /* | |
1da177e4 LT |
1208 | * For "remote" attribute values, simply note that we need to |
1209 | * allocate space for the "remote" value. We can't actually | |
1210 | * allocate the extents in this transaction, and we can't decide | |
1211 | * which blocks they should be as we might allocate more blocks | |
1212 | * as part of this transaction (a split operation for example). | |
1213 | */ | |
1214 | if (entry->flags & XFS_ATTR_LOCAL) { | |
517c2220 | 1215 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
1da177e4 | 1216 | name_loc->namelen = args->namelen; |
053b5758 | 1217 | name_loc->valuelen = cpu_to_be16(args->valuelen); |
1da177e4 LT |
1218 | memcpy((char *)name_loc->nameval, args->name, args->namelen); |
1219 | memcpy((char *)&name_loc->nameval[args->namelen], args->value, | |
053b5758 | 1220 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 | 1221 | } else { |
517c2220 | 1222 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
1223 | name_rmt->namelen = args->namelen; |
1224 | memcpy((char *)name_rmt->name, args->name, args->namelen); | |
1225 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
1226 | /* just in case */ | |
1227 | name_rmt->valuelen = 0; | |
1228 | name_rmt->valueblk = 0; | |
1229 | args->rmtblkno = 1; | |
ad1858d7 | 1230 | args->rmtblkcnt = xfs_attr3_rmt_blocks(mp, args->valuelen); |
8275cdd0 | 1231 | args->rmtvaluelen = args->valuelen; |
1da177e4 | 1232 | } |
1d9025e5 | 1233 | xfs_trans_log_buf(args->trans, bp, |
517c2220 | 1234 | XFS_DA_LOGRANGE(leaf, xfs_attr3_leaf_name(leaf, args->index), |
1da177e4 LT |
1235 | xfs_attr_leaf_entsize(leaf, args->index))); |
1236 | ||
1237 | /* | |
1238 | * Update the control info for this leaf node | |
1239 | */ | |
517c2220 DC |
1240 | if (be16_to_cpu(entry->nameidx) < ichdr->firstused) |
1241 | ichdr->firstused = be16_to_cpu(entry->nameidx); | |
1242 | ||
1243 | ASSERT(ichdr->firstused >= ichdr->count * sizeof(xfs_attr_leaf_entry_t) | |
1244 | + xfs_attr3_leaf_hdr_size(leaf)); | |
1245 | tmp = (ichdr->count - 1) * sizeof(xfs_attr_leaf_entry_t) | |
1246 | + xfs_attr3_leaf_hdr_size(leaf); | |
1247 | ||
1248 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
1249 | if (ichdr->freemap[i].base == tmp) { | |
1250 | ichdr->freemap[i].base += sizeof(xfs_attr_leaf_entry_t); | |
1251 | ichdr->freemap[i].size -= sizeof(xfs_attr_leaf_entry_t); | |
1da177e4 LT |
1252 | } |
1253 | } | |
517c2220 DC |
1254 | ichdr->usedbytes += xfs_attr_leaf_entsize(leaf, args->index); |
1255 | return 0; | |
1da177e4 LT |
1256 | } |
1257 | ||
1258 | /* | |
1259 | * Garbage collect a leaf attribute list block by copying it to a new buffer. | |
1260 | */ | |
1261 | STATIC void | |
517c2220 | 1262 | xfs_attr3_leaf_compact( |
ee73259b | 1263 | struct xfs_da_args *args, |
d4c712bc | 1264 | struct xfs_attr3_icleaf_hdr *ichdr_dst, |
ee73259b | 1265 | struct xfs_buf *bp) |
1da177e4 | 1266 | { |
d4c712bc DC |
1267 | struct xfs_attr_leafblock *leaf_src; |
1268 | struct xfs_attr_leafblock *leaf_dst; | |
1269 | struct xfs_attr3_icleaf_hdr ichdr_src; | |
ee73259b | 1270 | struct xfs_trans *trans = args->trans; |
ee73259b DC |
1271 | char *tmpbuffer; |
1272 | ||
1273 | trace_xfs_attr_leaf_compact(args); | |
1da177e4 | 1274 | |
c2c4c477 DC |
1275 | tmpbuffer = kmem_alloc(args->geo->blksize, KM_SLEEP); |
1276 | memcpy(tmpbuffer, bp->b_addr, args->geo->blksize); | |
1277 | memset(bp->b_addr, 0, args->geo->blksize); | |
d4c712bc DC |
1278 | leaf_src = (xfs_attr_leafblock_t *)tmpbuffer; |
1279 | leaf_dst = bp->b_addr; | |
1da177e4 LT |
1280 | |
1281 | /* | |
d4c712bc DC |
1282 | * Copy the on-disk header back into the destination buffer to ensure |
1283 | * all the information in the header that is not part of the incore | |
1284 | * header structure is preserved. | |
1da177e4 | 1285 | */ |
d4c712bc DC |
1286 | memcpy(bp->b_addr, tmpbuffer, xfs_attr3_leaf_hdr_size(leaf_src)); |
1287 | ||
1288 | /* Initialise the incore headers */ | |
1289 | ichdr_src = *ichdr_dst; /* struct copy */ | |
c2c4c477 | 1290 | ichdr_dst->firstused = args->geo->blksize; |
d4c712bc DC |
1291 | ichdr_dst->usedbytes = 0; |
1292 | ichdr_dst->count = 0; | |
1293 | ichdr_dst->holes = 0; | |
1294 | ichdr_dst->freemap[0].base = xfs_attr3_leaf_hdr_size(leaf_src); | |
1295 | ichdr_dst->freemap[0].size = ichdr_dst->firstused - | |
1296 | ichdr_dst->freemap[0].base; | |
1297 | ||
d4c712bc DC |
1298 | /* write the header back to initialise the underlying buffer */ |
1299 | xfs_attr3_leaf_hdr_to_disk(leaf_dst, ichdr_dst); | |
1da177e4 LT |
1300 | |
1301 | /* | |
1302 | * Copy all entry's in the same (sorted) order, | |
1303 | * but allocate name/value pairs packed and in sequence. | |
1304 | */ | |
c2c4c477 DC |
1305 | xfs_attr3_leaf_moveents(args, leaf_src, &ichdr_src, 0, |
1306 | leaf_dst, ichdr_dst, 0, ichdr_src.count); | |
517c2220 DC |
1307 | /* |
1308 | * this logs the entire buffer, but the caller must write the header | |
1309 | * back to the buffer when it is finished modifying it. | |
1310 | */ | |
c2c4c477 | 1311 | xfs_trans_log_buf(trans, bp, 0, args->geo->blksize - 1); |
1da177e4 | 1312 | |
f0e2d93c | 1313 | kmem_free(tmpbuffer); |
1da177e4 LT |
1314 | } |
1315 | ||
517c2220 DC |
1316 | /* |
1317 | * Compare two leaf blocks "order". | |
1318 | * Return 0 unless leaf2 should go before leaf1. | |
1319 | */ | |
1320 | static int | |
1321 | xfs_attr3_leaf_order( | |
1322 | struct xfs_buf *leaf1_bp, | |
1323 | struct xfs_attr3_icleaf_hdr *leaf1hdr, | |
1324 | struct xfs_buf *leaf2_bp, | |
1325 | struct xfs_attr3_icleaf_hdr *leaf2hdr) | |
1326 | { | |
1327 | struct xfs_attr_leaf_entry *entries1; | |
1328 | struct xfs_attr_leaf_entry *entries2; | |
1329 | ||
1330 | entries1 = xfs_attr3_leaf_entryp(leaf1_bp->b_addr); | |
1331 | entries2 = xfs_attr3_leaf_entryp(leaf2_bp->b_addr); | |
1332 | if (leaf1hdr->count > 0 && leaf2hdr->count > 0 && | |
1333 | ((be32_to_cpu(entries2[0].hashval) < | |
1334 | be32_to_cpu(entries1[0].hashval)) || | |
1335 | (be32_to_cpu(entries2[leaf2hdr->count - 1].hashval) < | |
1336 | be32_to_cpu(entries1[leaf1hdr->count - 1].hashval)))) { | |
1337 | return 1; | |
1338 | } | |
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | int | |
1343 | xfs_attr_leaf_order( | |
1344 | struct xfs_buf *leaf1_bp, | |
1345 | struct xfs_buf *leaf2_bp) | |
1346 | { | |
1347 | struct xfs_attr3_icleaf_hdr ichdr1; | |
1348 | struct xfs_attr3_icleaf_hdr ichdr2; | |
1349 | ||
1350 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1_bp->b_addr); | |
1351 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2_bp->b_addr); | |
1352 | return xfs_attr3_leaf_order(leaf1_bp, &ichdr1, leaf2_bp, &ichdr2); | |
1353 | } | |
1354 | ||
1da177e4 LT |
1355 | /* |
1356 | * Redistribute the attribute list entries between two leaf nodes, | |
1357 | * taking into account the size of the new entry. | |
1358 | * | |
1359 | * NOTE: if new block is empty, then it will get the upper half of the | |
1360 | * old block. At present, all (one) callers pass in an empty second block. | |
1361 | * | |
1362 | * This code adjusts the args->index/blkno and args->index2/blkno2 fields | |
1363 | * to match what it is doing in splitting the attribute leaf block. Those | |
1364 | * values are used in "atomic rename" operations on attributes. Note that | |
1365 | * the "new" and "old" values can end up in different blocks. | |
1366 | */ | |
1367 | STATIC void | |
517c2220 DC |
1368 | xfs_attr3_leaf_rebalance( |
1369 | struct xfs_da_state *state, | |
1370 | struct xfs_da_state_blk *blk1, | |
1371 | struct xfs_da_state_blk *blk2) | |
1da177e4 | 1372 | { |
517c2220 DC |
1373 | struct xfs_da_args *args; |
1374 | struct xfs_attr_leafblock *leaf1; | |
1375 | struct xfs_attr_leafblock *leaf2; | |
1376 | struct xfs_attr3_icleaf_hdr ichdr1; | |
1377 | struct xfs_attr3_icleaf_hdr ichdr2; | |
1378 | struct xfs_attr_leaf_entry *entries1; | |
1379 | struct xfs_attr_leaf_entry *entries2; | |
1380 | int count; | |
1381 | int totallen; | |
1382 | int max; | |
1383 | int space; | |
1384 | int swap; | |
1da177e4 LT |
1385 | |
1386 | /* | |
1387 | * Set up environment. | |
1388 | */ | |
1389 | ASSERT(blk1->magic == XFS_ATTR_LEAF_MAGIC); | |
1390 | ASSERT(blk2->magic == XFS_ATTR_LEAF_MAGIC); | |
1d9025e5 DC |
1391 | leaf1 = blk1->bp->b_addr; |
1392 | leaf2 = blk2->bp->b_addr; | |
517c2220 DC |
1393 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1); |
1394 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2); | |
1395 | ASSERT(ichdr2.count == 0); | |
1da177e4 LT |
1396 | args = state->args; |
1397 | ||
5a5881cd DC |
1398 | trace_xfs_attr_leaf_rebalance(args); |
1399 | ||
1da177e4 LT |
1400 | /* |
1401 | * Check ordering of blocks, reverse if it makes things simpler. | |
1402 | * | |
1403 | * NOTE: Given that all (current) callers pass in an empty | |
1404 | * second block, this code should never set "swap". | |
1405 | */ | |
1406 | swap = 0; | |
517c2220 DC |
1407 | if (xfs_attr3_leaf_order(blk1->bp, &ichdr1, blk2->bp, &ichdr2)) { |
1408 | struct xfs_da_state_blk *tmp_blk; | |
1409 | struct xfs_attr3_icleaf_hdr tmp_ichdr; | |
1410 | ||
1da177e4 LT |
1411 | tmp_blk = blk1; |
1412 | blk1 = blk2; | |
1413 | blk2 = tmp_blk; | |
517c2220 DC |
1414 | |
1415 | /* struct copies to swap them rather than reconverting */ | |
1416 | tmp_ichdr = ichdr1; | |
1417 | ichdr1 = ichdr2; | |
1418 | ichdr2 = tmp_ichdr; | |
1419 | ||
1d9025e5 DC |
1420 | leaf1 = blk1->bp->b_addr; |
1421 | leaf2 = blk2->bp->b_addr; | |
1da177e4 LT |
1422 | swap = 1; |
1423 | } | |
1da177e4 LT |
1424 | |
1425 | /* | |
1426 | * Examine entries until we reduce the absolute difference in | |
1427 | * byte usage between the two blocks to a minimum. Then get | |
1428 | * the direction to copy and the number of elements to move. | |
1429 | * | |
1430 | * "inleaf" is true if the new entry should be inserted into blk1. | |
1431 | * If "swap" is also true, then reverse the sense of "inleaf". | |
1432 | */ | |
517c2220 DC |
1433 | state->inleaf = xfs_attr3_leaf_figure_balance(state, blk1, &ichdr1, |
1434 | blk2, &ichdr2, | |
1435 | &count, &totallen); | |
1da177e4 LT |
1436 | if (swap) |
1437 | state->inleaf = !state->inleaf; | |
1438 | ||
1439 | /* | |
1440 | * Move any entries required from leaf to leaf: | |
1441 | */ | |
517c2220 | 1442 | if (count < ichdr1.count) { |
1da177e4 LT |
1443 | /* |
1444 | * Figure the total bytes to be added to the destination leaf. | |
1445 | */ | |
1446 | /* number entries being moved */ | |
517c2220 DC |
1447 | count = ichdr1.count - count; |
1448 | space = ichdr1.usedbytes - totallen; | |
1da177e4 LT |
1449 | space += count * sizeof(xfs_attr_leaf_entry_t); |
1450 | ||
1451 | /* | |
1452 | * leaf2 is the destination, compact it if it looks tight. | |
1453 | */ | |
517c2220 DC |
1454 | max = ichdr2.firstused - xfs_attr3_leaf_hdr_size(leaf1); |
1455 | max -= ichdr2.count * sizeof(xfs_attr_leaf_entry_t); | |
ee73259b | 1456 | if (space > max) |
517c2220 | 1457 | xfs_attr3_leaf_compact(args, &ichdr2, blk2->bp); |
1da177e4 LT |
1458 | |
1459 | /* | |
1460 | * Move high entries from leaf1 to low end of leaf2. | |
1461 | */ | |
c2c4c477 DC |
1462 | xfs_attr3_leaf_moveents(args, leaf1, &ichdr1, |
1463 | ichdr1.count - count, leaf2, &ichdr2, 0, count); | |
1da177e4 | 1464 | |
517c2220 | 1465 | } else if (count > ichdr1.count) { |
1da177e4 LT |
1466 | /* |
1467 | * I assert that since all callers pass in an empty | |
1468 | * second buffer, this code should never execute. | |
1469 | */ | |
07428d7f | 1470 | ASSERT(0); |
1da177e4 LT |
1471 | |
1472 | /* | |
1473 | * Figure the total bytes to be added to the destination leaf. | |
1474 | */ | |
1475 | /* number entries being moved */ | |
517c2220 DC |
1476 | count -= ichdr1.count; |
1477 | space = totallen - ichdr1.usedbytes; | |
1da177e4 LT |
1478 | space += count * sizeof(xfs_attr_leaf_entry_t); |
1479 | ||
1480 | /* | |
1481 | * leaf1 is the destination, compact it if it looks tight. | |
1482 | */ | |
517c2220 DC |
1483 | max = ichdr1.firstused - xfs_attr3_leaf_hdr_size(leaf1); |
1484 | max -= ichdr1.count * sizeof(xfs_attr_leaf_entry_t); | |
ee73259b | 1485 | if (space > max) |
517c2220 | 1486 | xfs_attr3_leaf_compact(args, &ichdr1, blk1->bp); |
1da177e4 LT |
1487 | |
1488 | /* | |
1489 | * Move low entries from leaf2 to high end of leaf1. | |
1490 | */ | |
c2c4c477 DC |
1491 | xfs_attr3_leaf_moveents(args, leaf2, &ichdr2, 0, leaf1, &ichdr1, |
1492 | ichdr1.count, count); | |
1da177e4 LT |
1493 | } |
1494 | ||
517c2220 DC |
1495 | xfs_attr3_leaf_hdr_to_disk(leaf1, &ichdr1); |
1496 | xfs_attr3_leaf_hdr_to_disk(leaf2, &ichdr2); | |
b2a21e7a DC |
1497 | xfs_trans_log_buf(args->trans, blk1->bp, 0, args->geo->blksize - 1); |
1498 | xfs_trans_log_buf(args->trans, blk2->bp, 0, args->geo->blksize - 1); | |
517c2220 | 1499 | |
1da177e4 LT |
1500 | /* |
1501 | * Copy out last hashval in each block for B-tree code. | |
1502 | */ | |
517c2220 DC |
1503 | entries1 = xfs_attr3_leaf_entryp(leaf1); |
1504 | entries2 = xfs_attr3_leaf_entryp(leaf2); | |
1505 | blk1->hashval = be32_to_cpu(entries1[ichdr1.count - 1].hashval); | |
1506 | blk2->hashval = be32_to_cpu(entries2[ichdr2.count - 1].hashval); | |
1da177e4 LT |
1507 | |
1508 | /* | |
1509 | * Adjust the expected index for insertion. | |
1510 | * NOTE: this code depends on the (current) situation that the | |
1511 | * second block was originally empty. | |
1512 | * | |
1513 | * If the insertion point moved to the 2nd block, we must adjust | |
1514 | * the index. We must also track the entry just following the | |
1515 | * new entry for use in an "atomic rename" operation, that entry | |
1516 | * is always the "old" entry and the "new" entry is what we are | |
1517 | * inserting. The index/blkno fields refer to the "old" entry, | |
1518 | * while the index2/blkno2 fields refer to the "new" entry. | |
1519 | */ | |
517c2220 | 1520 | if (blk1->index > ichdr1.count) { |
1da177e4 | 1521 | ASSERT(state->inleaf == 0); |
517c2220 | 1522 | blk2->index = blk1->index - ichdr1.count; |
1da177e4 LT |
1523 | args->index = args->index2 = blk2->index; |
1524 | args->blkno = args->blkno2 = blk2->blkno; | |
517c2220 | 1525 | } else if (blk1->index == ichdr1.count) { |
1da177e4 LT |
1526 | if (state->inleaf) { |
1527 | args->index = blk1->index; | |
1528 | args->blkno = blk1->blkno; | |
1529 | args->index2 = 0; | |
1530 | args->blkno2 = blk2->blkno; | |
1531 | } else { | |
07428d7f DC |
1532 | /* |
1533 | * On a double leaf split, the original attr location | |
1534 | * is already stored in blkno2/index2, so don't | |
1535 | * overwrite it overwise we corrupt the tree. | |
1536 | */ | |
517c2220 | 1537 | blk2->index = blk1->index - ichdr1.count; |
07428d7f DC |
1538 | args->index = blk2->index; |
1539 | args->blkno = blk2->blkno; | |
1540 | if (!state->extravalid) { | |
1541 | /* | |
1542 | * set the new attr location to match the old | |
1543 | * one and let the higher level split code | |
1544 | * decide where in the leaf to place it. | |
1545 | */ | |
1546 | args->index2 = blk2->index; | |
1547 | args->blkno2 = blk2->blkno; | |
1548 | } | |
1da177e4 LT |
1549 | } |
1550 | } else { | |
1551 | ASSERT(state->inleaf == 1); | |
1552 | args->index = args->index2 = blk1->index; | |
1553 | args->blkno = args->blkno2 = blk1->blkno; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | /* | |
1558 | * Examine entries until we reduce the absolute difference in | |
1559 | * byte usage between the two blocks to a minimum. | |
1560 | * GROT: Is this really necessary? With other than a 512 byte blocksize, | |
1561 | * GROT: there will always be enough room in either block for a new entry. | |
1562 | * GROT: Do a double-split for this case? | |
1563 | */ | |
1564 | STATIC int | |
517c2220 DC |
1565 | xfs_attr3_leaf_figure_balance( |
1566 | struct xfs_da_state *state, | |
1567 | struct xfs_da_state_blk *blk1, | |
1568 | struct xfs_attr3_icleaf_hdr *ichdr1, | |
1569 | struct xfs_da_state_blk *blk2, | |
1570 | struct xfs_attr3_icleaf_hdr *ichdr2, | |
1571 | int *countarg, | |
1572 | int *usedbytesarg) | |
1da177e4 | 1573 | { |
517c2220 DC |
1574 | struct xfs_attr_leafblock *leaf1 = blk1->bp->b_addr; |
1575 | struct xfs_attr_leafblock *leaf2 = blk2->bp->b_addr; | |
1576 | struct xfs_attr_leaf_entry *entry; | |
1577 | int count; | |
1578 | int max; | |
1579 | int index; | |
1580 | int totallen = 0; | |
1581 | int half; | |
1582 | int lastdelta; | |
1583 | int foundit = 0; | |
1584 | int tmp; | |
1da177e4 LT |
1585 | |
1586 | /* | |
1587 | * Examine entries until we reduce the absolute difference in | |
1588 | * byte usage between the two blocks to a minimum. | |
1589 | */ | |
517c2220 DC |
1590 | max = ichdr1->count + ichdr2->count; |
1591 | half = (max + 1) * sizeof(*entry); | |
1592 | half += ichdr1->usedbytes + ichdr2->usedbytes + | |
c59f0ad2 | 1593 | xfs_attr_leaf_newentsize(state->args, NULL); |
1da177e4 | 1594 | half /= 2; |
b2a21e7a | 1595 | lastdelta = state->args->geo->blksize; |
517c2220 | 1596 | entry = xfs_attr3_leaf_entryp(leaf1); |
1da177e4 LT |
1597 | for (count = index = 0; count < max; entry++, index++, count++) { |
1598 | ||
1599 | #define XFS_ATTR_ABS(A) (((A) < 0) ? -(A) : (A)) | |
1600 | /* | |
1601 | * The new entry is in the first block, account for it. | |
1602 | */ | |
1603 | if (count == blk1->index) { | |
1604 | tmp = totallen + sizeof(*entry) + | |
c59f0ad2 | 1605 | xfs_attr_leaf_newentsize(state->args, NULL); |
1da177e4 LT |
1606 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) |
1607 | break; | |
1608 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1609 | totallen = tmp; | |
1610 | foundit = 1; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * Wrap around into the second block if necessary. | |
1615 | */ | |
517c2220 | 1616 | if (count == ichdr1->count) { |
1da177e4 | 1617 | leaf1 = leaf2; |
517c2220 | 1618 | entry = xfs_attr3_leaf_entryp(leaf1); |
1da177e4 LT |
1619 | index = 0; |
1620 | } | |
1621 | ||
1622 | /* | |
1623 | * Figure out if next leaf entry would be too much. | |
1624 | */ | |
1625 | tmp = totallen + sizeof(*entry) + xfs_attr_leaf_entsize(leaf1, | |
1626 | index); | |
1627 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) | |
1628 | break; | |
1629 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1630 | totallen = tmp; | |
1631 | #undef XFS_ATTR_ABS | |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Calculate the number of usedbytes that will end up in lower block. | |
1636 | * If new entry not in lower block, fix up the count. | |
1637 | */ | |
1638 | totallen -= count * sizeof(*entry); | |
1639 | if (foundit) { | |
1640 | totallen -= sizeof(*entry) + | |
c59f0ad2 | 1641 | xfs_attr_leaf_newentsize(state->args, NULL); |
1da177e4 LT |
1642 | } |
1643 | ||
1644 | *countarg = count; | |
1645 | *usedbytesarg = totallen; | |
517c2220 | 1646 | return foundit; |
1da177e4 LT |
1647 | } |
1648 | ||
1649 | /*======================================================================== | |
1650 | * Routines used for shrinking the Btree. | |
1651 | *========================================================================*/ | |
1652 | ||
1653 | /* | |
1654 | * Check a leaf block and its neighbors to see if the block should be | |
1655 | * collapsed into one or the other neighbor. Always keep the block | |
1656 | * with the smaller block number. | |
1657 | * If the current block is over 50% full, don't try to join it, return 0. | |
1658 | * If the block is empty, fill in the state structure and return 2. | |
1659 | * If it can be collapsed, fill in the state structure and return 1. | |
1660 | * If nothing can be done, return 0. | |
1661 | * | |
1662 | * GROT: allow for INCOMPLETE entries in calculation. | |
1663 | */ | |
1664 | int | |
517c2220 DC |
1665 | xfs_attr3_leaf_toosmall( |
1666 | struct xfs_da_state *state, | |
1667 | int *action) | |
1da177e4 | 1668 | { |
517c2220 DC |
1669 | struct xfs_attr_leafblock *leaf; |
1670 | struct xfs_da_state_blk *blk; | |
1671 | struct xfs_attr3_icleaf_hdr ichdr; | |
1672 | struct xfs_buf *bp; | |
1673 | xfs_dablk_t blkno; | |
1674 | int bytes; | |
1675 | int forward; | |
1676 | int error; | |
1677 | int retval; | |
1678 | int i; | |
1da177e4 | 1679 | |
ee73259b DC |
1680 | trace_xfs_attr_leaf_toosmall(state->args); |
1681 | ||
1da177e4 LT |
1682 | /* |
1683 | * Check for the degenerate case of the block being over 50% full. | |
1684 | * If so, it's not worth even looking to see if we might be able | |
1685 | * to coalesce with a sibling. | |
1686 | */ | |
1687 | blk = &state->path.blk[ state->path.active-1 ]; | |
517c2220 DC |
1688 | leaf = blk->bp->b_addr; |
1689 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); | |
1690 | bytes = xfs_attr3_leaf_hdr_size(leaf) + | |
1691 | ichdr.count * sizeof(xfs_attr_leaf_entry_t) + | |
1692 | ichdr.usedbytes; | |
b2a21e7a | 1693 | if (bytes > (state->args->geo->blksize >> 1)) { |
1da177e4 | 1694 | *action = 0; /* blk over 50%, don't try to join */ |
d99831ff | 1695 | return 0; |
1da177e4 LT |
1696 | } |
1697 | ||
1698 | /* | |
1699 | * Check for the degenerate case of the block being empty. | |
1700 | * If the block is empty, we'll simply delete it, no need to | |
c41564b5 | 1701 | * coalesce it with a sibling block. We choose (arbitrarily) |
1da177e4 LT |
1702 | * to merge with the forward block unless it is NULL. |
1703 | */ | |
517c2220 | 1704 | if (ichdr.count == 0) { |
1da177e4 LT |
1705 | /* |
1706 | * Make altpath point to the block we want to keep and | |
1707 | * path point to the block we want to drop (this one). | |
1708 | */ | |
517c2220 | 1709 | forward = (ichdr.forw != 0); |
1da177e4 | 1710 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
f5ea1100 | 1711 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
1da177e4 LT |
1712 | 0, &retval); |
1713 | if (error) | |
d99831ff | 1714 | return error; |
1da177e4 LT |
1715 | if (retval) { |
1716 | *action = 0; | |
1717 | } else { | |
1718 | *action = 2; | |
1719 | } | |
517c2220 | 1720 | return 0; |
1da177e4 LT |
1721 | } |
1722 | ||
1723 | /* | |
1724 | * Examine each sibling block to see if we can coalesce with | |
1725 | * at least 25% free space to spare. We need to figure out | |
1726 | * whether to merge with the forward or the backward block. | |
1727 | * We prefer coalescing with the lower numbered sibling so as | |
1728 | * to shrink an attribute list over time. | |
1729 | */ | |
1730 | /* start with smaller blk num */ | |
517c2220 | 1731 | forward = ichdr.forw < ichdr.back; |
1da177e4 | 1732 | for (i = 0; i < 2; forward = !forward, i++) { |
517c2220 | 1733 | struct xfs_attr3_icleaf_hdr ichdr2; |
1da177e4 | 1734 | if (forward) |
517c2220 | 1735 | blkno = ichdr.forw; |
1da177e4 | 1736 | else |
517c2220 | 1737 | blkno = ichdr.back; |
1da177e4 LT |
1738 | if (blkno == 0) |
1739 | continue; | |
517c2220 | 1740 | error = xfs_attr3_leaf_read(state->args->trans, state->args->dp, |
ad14c33a | 1741 | blkno, -1, &bp); |
1da177e4 | 1742 | if (error) |
d99831ff | 1743 | return error; |
1da177e4 | 1744 | |
517c2220 DC |
1745 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, bp->b_addr); |
1746 | ||
b2a21e7a DC |
1747 | bytes = state->args->geo->blksize - |
1748 | (state->args->geo->blksize >> 2) - | |
517c2220 DC |
1749 | ichdr.usedbytes - ichdr2.usedbytes - |
1750 | ((ichdr.count + ichdr2.count) * | |
1751 | sizeof(xfs_attr_leaf_entry_t)) - | |
1752 | xfs_attr3_leaf_hdr_size(leaf); | |
1753 | ||
1d9025e5 | 1754 | xfs_trans_brelse(state->args->trans, bp); |
1da177e4 LT |
1755 | if (bytes >= 0) |
1756 | break; /* fits with at least 25% to spare */ | |
1757 | } | |
1758 | if (i >= 2) { | |
1759 | *action = 0; | |
d99831ff | 1760 | return 0; |
1da177e4 LT |
1761 | } |
1762 | ||
1763 | /* | |
1764 | * Make altpath point to the block we want to keep (the lower | |
1765 | * numbered block) and path point to the block we want to drop. | |
1766 | */ | |
1767 | memcpy(&state->altpath, &state->path, sizeof(state->path)); | |
1768 | if (blkno < blk->blkno) { | |
f5ea1100 | 1769 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
1da177e4 LT |
1770 | 0, &retval); |
1771 | } else { | |
f5ea1100 | 1772 | error = xfs_da3_path_shift(state, &state->path, forward, |
1da177e4 LT |
1773 | 0, &retval); |
1774 | } | |
1775 | if (error) | |
d99831ff | 1776 | return error; |
1da177e4 LT |
1777 | if (retval) { |
1778 | *action = 0; | |
1779 | } else { | |
1780 | *action = 1; | |
1781 | } | |
d99831ff | 1782 | return 0; |
1da177e4 LT |
1783 | } |
1784 | ||
1785 | /* | |
1786 | * Remove a name from the leaf attribute list structure. | |
1787 | * | |
1788 | * Return 1 if leaf is less than 37% full, 0 if >= 37% full. | |
1789 | * If two leaves are 37% full, when combined they will leave 25% free. | |
1790 | */ | |
1791 | int | |
517c2220 DC |
1792 | xfs_attr3_leaf_remove( |
1793 | struct xfs_buf *bp, | |
1794 | struct xfs_da_args *args) | |
1da177e4 | 1795 | { |
517c2220 DC |
1796 | struct xfs_attr_leafblock *leaf; |
1797 | struct xfs_attr3_icleaf_hdr ichdr; | |
1798 | struct xfs_attr_leaf_entry *entry; | |
517c2220 DC |
1799 | int before; |
1800 | int after; | |
1801 | int smallest; | |
1802 | int entsize; | |
1803 | int tablesize; | |
1804 | int tmp; | |
1805 | int i; | |
1da177e4 | 1806 | |
ee73259b DC |
1807 | trace_xfs_attr_leaf_remove(args); |
1808 | ||
1d9025e5 | 1809 | leaf = bp->b_addr; |
517c2220 DC |
1810 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
1811 | ||
c2c4c477 | 1812 | ASSERT(ichdr.count > 0 && ichdr.count < args->geo->blksize / 8); |
517c2220 DC |
1813 | ASSERT(args->index >= 0 && args->index < ichdr.count); |
1814 | ASSERT(ichdr.firstused >= ichdr.count * sizeof(*entry) + | |
1815 | xfs_attr3_leaf_hdr_size(leaf)); | |
1816 | ||
1817 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; | |
1818 | ||
1819 | ASSERT(be16_to_cpu(entry->nameidx) >= ichdr.firstused); | |
c2c4c477 | 1820 | ASSERT(be16_to_cpu(entry->nameidx) < args->geo->blksize); |
1da177e4 LT |
1821 | |
1822 | /* | |
1823 | * Scan through free region table: | |
1824 | * check for adjacency of free'd entry with an existing one, | |
1825 | * find smallest free region in case we need to replace it, | |
1826 | * adjust any map that borders the entry table, | |
1827 | */ | |
517c2220 DC |
1828 | tablesize = ichdr.count * sizeof(xfs_attr_leaf_entry_t) |
1829 | + xfs_attr3_leaf_hdr_size(leaf); | |
1830 | tmp = ichdr.freemap[0].size; | |
1da177e4 LT |
1831 | before = after = -1; |
1832 | smallest = XFS_ATTR_LEAF_MAPSIZE - 1; | |
1833 | entsize = xfs_attr_leaf_entsize(leaf, args->index); | |
517c2220 | 1834 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
c2c4c477 DC |
1835 | ASSERT(ichdr.freemap[i].base < args->geo->blksize); |
1836 | ASSERT(ichdr.freemap[i].size < args->geo->blksize); | |
517c2220 DC |
1837 | if (ichdr.freemap[i].base == tablesize) { |
1838 | ichdr.freemap[i].base -= sizeof(xfs_attr_leaf_entry_t); | |
1839 | ichdr.freemap[i].size += sizeof(xfs_attr_leaf_entry_t); | |
1da177e4 LT |
1840 | } |
1841 | ||
517c2220 DC |
1842 | if (ichdr.freemap[i].base + ichdr.freemap[i].size == |
1843 | be16_to_cpu(entry->nameidx)) { | |
1da177e4 | 1844 | before = i; |
517c2220 DC |
1845 | } else if (ichdr.freemap[i].base == |
1846 | (be16_to_cpu(entry->nameidx) + entsize)) { | |
1da177e4 | 1847 | after = i; |
517c2220 DC |
1848 | } else if (ichdr.freemap[i].size < tmp) { |
1849 | tmp = ichdr.freemap[i].size; | |
1da177e4 LT |
1850 | smallest = i; |
1851 | } | |
1852 | } | |
1853 | ||
1854 | /* | |
1855 | * Coalesce adjacent freemap regions, | |
1856 | * or replace the smallest region. | |
1857 | */ | |
1858 | if ((before >= 0) || (after >= 0)) { | |
1859 | if ((before >= 0) && (after >= 0)) { | |
517c2220 DC |
1860 | ichdr.freemap[before].size += entsize; |
1861 | ichdr.freemap[before].size += ichdr.freemap[after].size; | |
1862 | ichdr.freemap[after].base = 0; | |
1863 | ichdr.freemap[after].size = 0; | |
1da177e4 | 1864 | } else if (before >= 0) { |
517c2220 | 1865 | ichdr.freemap[before].size += entsize; |
1da177e4 | 1866 | } else { |
517c2220 DC |
1867 | ichdr.freemap[after].base = be16_to_cpu(entry->nameidx); |
1868 | ichdr.freemap[after].size += entsize; | |
1da177e4 LT |
1869 | } |
1870 | } else { | |
1871 | /* | |
1872 | * Replace smallest region (if it is smaller than free'd entry) | |
1873 | */ | |
517c2220 DC |
1874 | if (ichdr.freemap[smallest].size < entsize) { |
1875 | ichdr.freemap[smallest].base = be16_to_cpu(entry->nameidx); | |
1876 | ichdr.freemap[smallest].size = entsize; | |
1da177e4 LT |
1877 | } |
1878 | } | |
1879 | ||
1880 | /* | |
1881 | * Did we remove the first entry? | |
1882 | */ | |
517c2220 | 1883 | if (be16_to_cpu(entry->nameidx) == ichdr.firstused) |
1da177e4 LT |
1884 | smallest = 1; |
1885 | else | |
1886 | smallest = 0; | |
1887 | ||
1888 | /* | |
1889 | * Compress the remaining entries and zero out the removed stuff. | |
1890 | */ | |
517c2220 DC |
1891 | memset(xfs_attr3_leaf_name(leaf, args->index), 0, entsize); |
1892 | ichdr.usedbytes -= entsize; | |
1d9025e5 | 1893 | xfs_trans_log_buf(args->trans, bp, |
517c2220 | 1894 | XFS_DA_LOGRANGE(leaf, xfs_attr3_leaf_name(leaf, args->index), |
1da177e4 LT |
1895 | entsize)); |
1896 | ||
517c2220 DC |
1897 | tmp = (ichdr.count - args->index) * sizeof(xfs_attr_leaf_entry_t); |
1898 | memmove(entry, entry + 1, tmp); | |
1899 | ichdr.count--; | |
1d9025e5 | 1900 | xfs_trans_log_buf(args->trans, bp, |
517c2220 DC |
1901 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(xfs_attr_leaf_entry_t))); |
1902 | ||
1903 | entry = &xfs_attr3_leaf_entryp(leaf)[ichdr.count]; | |
1904 | memset(entry, 0, sizeof(xfs_attr_leaf_entry_t)); | |
1da177e4 LT |
1905 | |
1906 | /* | |
1907 | * If we removed the first entry, re-find the first used byte | |
1908 | * in the name area. Note that if the entry was the "firstused", | |
1909 | * then we don't have a "hole" in our block resulting from | |
1910 | * removing the name. | |
1911 | */ | |
1912 | if (smallest) { | |
c2c4c477 | 1913 | tmp = args->geo->blksize; |
517c2220 DC |
1914 | entry = xfs_attr3_leaf_entryp(leaf); |
1915 | for (i = ichdr.count - 1; i >= 0; entry++, i--) { | |
1916 | ASSERT(be16_to_cpu(entry->nameidx) >= ichdr.firstused); | |
c2c4c477 | 1917 | ASSERT(be16_to_cpu(entry->nameidx) < args->geo->blksize); |
6b19f2d8 NS |
1918 | |
1919 | if (be16_to_cpu(entry->nameidx) < tmp) | |
1920 | tmp = be16_to_cpu(entry->nameidx); | |
1da177e4 | 1921 | } |
517c2220 DC |
1922 | ichdr.firstused = tmp; |
1923 | if (!ichdr.firstused) | |
1924 | ichdr.firstused = tmp - XFS_ATTR_LEAF_NAME_ALIGN; | |
1da177e4 | 1925 | } else { |
517c2220 | 1926 | ichdr.holes = 1; /* mark as needing compaction */ |
1da177e4 | 1927 | } |
517c2220 | 1928 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
1d9025e5 | 1929 | xfs_trans_log_buf(args->trans, bp, |
517c2220 DC |
1930 | XFS_DA_LOGRANGE(leaf, &leaf->hdr, |
1931 | xfs_attr3_leaf_hdr_size(leaf))); | |
1da177e4 LT |
1932 | |
1933 | /* | |
1934 | * Check if leaf is less than 50% full, caller may want to | |
1935 | * "join" the leaf with a sibling if so. | |
1936 | */ | |
517c2220 DC |
1937 | tmp = ichdr.usedbytes + xfs_attr3_leaf_hdr_size(leaf) + |
1938 | ichdr.count * sizeof(xfs_attr_leaf_entry_t); | |
1939 | ||
ed358c00 | 1940 | return tmp < args->geo->magicpct; /* leaf is < 37% full */ |
1da177e4 LT |
1941 | } |
1942 | ||
1943 | /* | |
1944 | * Move all the attribute list entries from drop_leaf into save_leaf. | |
1945 | */ | |
1946 | void | |
517c2220 DC |
1947 | xfs_attr3_leaf_unbalance( |
1948 | struct xfs_da_state *state, | |
1949 | struct xfs_da_state_blk *drop_blk, | |
1950 | struct xfs_da_state_blk *save_blk) | |
1da177e4 | 1951 | { |
517c2220 DC |
1952 | struct xfs_attr_leafblock *drop_leaf = drop_blk->bp->b_addr; |
1953 | struct xfs_attr_leafblock *save_leaf = save_blk->bp->b_addr; | |
1954 | struct xfs_attr3_icleaf_hdr drophdr; | |
1955 | struct xfs_attr3_icleaf_hdr savehdr; | |
1956 | struct xfs_attr_leaf_entry *entry; | |
1da177e4 | 1957 | |
5a5881cd DC |
1958 | trace_xfs_attr_leaf_unbalance(state->args); |
1959 | ||
1d9025e5 DC |
1960 | drop_leaf = drop_blk->bp->b_addr; |
1961 | save_leaf = save_blk->bp->b_addr; | |
517c2220 DC |
1962 | xfs_attr3_leaf_hdr_from_disk(&drophdr, drop_leaf); |
1963 | xfs_attr3_leaf_hdr_from_disk(&savehdr, save_leaf); | |
1964 | entry = xfs_attr3_leaf_entryp(drop_leaf); | |
1da177e4 LT |
1965 | |
1966 | /* | |
1967 | * Save last hashval from dying block for later Btree fixup. | |
1968 | */ | |
517c2220 | 1969 | drop_blk->hashval = be32_to_cpu(entry[drophdr.count - 1].hashval); |
1da177e4 LT |
1970 | |
1971 | /* | |
1972 | * Check if we need a temp buffer, or can we do it in place. | |
1973 | * Note that we don't check "leaf" for holes because we will | |
1974 | * always be dropping it, toosmall() decided that for us already. | |
1975 | */ | |
517c2220 | 1976 | if (savehdr.holes == 0) { |
1da177e4 LT |
1977 | /* |
1978 | * dest leaf has no holes, so we add there. May need | |
1979 | * to make some room in the entry array. | |
1980 | */ | |
517c2220 DC |
1981 | if (xfs_attr3_leaf_order(save_blk->bp, &savehdr, |
1982 | drop_blk->bp, &drophdr)) { | |
c2c4c477 DC |
1983 | xfs_attr3_leaf_moveents(state->args, |
1984 | drop_leaf, &drophdr, 0, | |
517c2220 | 1985 | save_leaf, &savehdr, 0, |
c2c4c477 | 1986 | drophdr.count); |
1da177e4 | 1987 | } else { |
c2c4c477 DC |
1988 | xfs_attr3_leaf_moveents(state->args, |
1989 | drop_leaf, &drophdr, 0, | |
517c2220 | 1990 | save_leaf, &savehdr, |
c2c4c477 | 1991 | savehdr.count, drophdr.count); |
1da177e4 LT |
1992 | } |
1993 | } else { | |
1994 | /* | |
1995 | * Destination has holes, so we make a temporary copy | |
1996 | * of the leaf and add them both to that. | |
1997 | */ | |
517c2220 DC |
1998 | struct xfs_attr_leafblock *tmp_leaf; |
1999 | struct xfs_attr3_icleaf_hdr tmphdr; | |
2000 | ||
b2a21e7a | 2001 | tmp_leaf = kmem_zalloc(state->args->geo->blksize, KM_SLEEP); |
8517de2a DC |
2002 | |
2003 | /* | |
2004 | * Copy the header into the temp leaf so that all the stuff | |
2005 | * not in the incore header is present and gets copied back in | |
2006 | * once we've moved all the entries. | |
2007 | */ | |
2008 | memcpy(tmp_leaf, save_leaf, xfs_attr3_leaf_hdr_size(save_leaf)); | |
517c2220 | 2009 | |
8517de2a | 2010 | memset(&tmphdr, 0, sizeof(tmphdr)); |
517c2220 DC |
2011 | tmphdr.magic = savehdr.magic; |
2012 | tmphdr.forw = savehdr.forw; | |
2013 | tmphdr.back = savehdr.back; | |
b2a21e7a | 2014 | tmphdr.firstused = state->args->geo->blksize; |
8517de2a DC |
2015 | |
2016 | /* write the header to the temp buffer to initialise it */ | |
2017 | xfs_attr3_leaf_hdr_to_disk(tmp_leaf, &tmphdr); | |
2018 | ||
517c2220 DC |
2019 | if (xfs_attr3_leaf_order(save_blk->bp, &savehdr, |
2020 | drop_blk->bp, &drophdr)) { | |
c2c4c477 DC |
2021 | xfs_attr3_leaf_moveents(state->args, |
2022 | drop_leaf, &drophdr, 0, | |
517c2220 | 2023 | tmp_leaf, &tmphdr, 0, |
c2c4c477 DC |
2024 | drophdr.count); |
2025 | xfs_attr3_leaf_moveents(state->args, | |
2026 | save_leaf, &savehdr, 0, | |
517c2220 | 2027 | tmp_leaf, &tmphdr, tmphdr.count, |
c2c4c477 | 2028 | savehdr.count); |
1da177e4 | 2029 | } else { |
c2c4c477 DC |
2030 | xfs_attr3_leaf_moveents(state->args, |
2031 | save_leaf, &savehdr, 0, | |
517c2220 | 2032 | tmp_leaf, &tmphdr, 0, |
c2c4c477 DC |
2033 | savehdr.count); |
2034 | xfs_attr3_leaf_moveents(state->args, | |
2035 | drop_leaf, &drophdr, 0, | |
517c2220 | 2036 | tmp_leaf, &tmphdr, tmphdr.count, |
c2c4c477 | 2037 | drophdr.count); |
1da177e4 | 2038 | } |
b2a21e7a | 2039 | memcpy(save_leaf, tmp_leaf, state->args->geo->blksize); |
517c2220 DC |
2040 | savehdr = tmphdr; /* struct copy */ |
2041 | kmem_free(tmp_leaf); | |
1da177e4 LT |
2042 | } |
2043 | ||
517c2220 | 2044 | xfs_attr3_leaf_hdr_to_disk(save_leaf, &savehdr); |
1d9025e5 | 2045 | xfs_trans_log_buf(state->args->trans, save_blk->bp, 0, |
b2a21e7a | 2046 | state->args->geo->blksize - 1); |
1da177e4 LT |
2047 | |
2048 | /* | |
2049 | * Copy out last hashval in each block for B-tree code. | |
2050 | */ | |
517c2220 DC |
2051 | entry = xfs_attr3_leaf_entryp(save_leaf); |
2052 | save_blk->hashval = be32_to_cpu(entry[savehdr.count - 1].hashval); | |
1da177e4 LT |
2053 | } |
2054 | ||
2055 | /*======================================================================== | |
2056 | * Routines used for finding things in the Btree. | |
2057 | *========================================================================*/ | |
2058 | ||
2059 | /* | |
2060 | * Look up a name in a leaf attribute list structure. | |
2061 | * This is the internal routine, it uses the caller's buffer. | |
2062 | * | |
2063 | * Note that duplicate keys are allowed, but only check within the | |
2064 | * current leaf node. The Btree code must check in adjacent leaf nodes. | |
2065 | * | |
2066 | * Return in args->index the index into the entry[] array of either | |
2067 | * the found entry, or where the entry should have been (insert before | |
2068 | * that entry). | |
2069 | * | |
2070 | * Don't change the args->value unless we find the attribute. | |
2071 | */ | |
2072 | int | |
517c2220 DC |
2073 | xfs_attr3_leaf_lookup_int( |
2074 | struct xfs_buf *bp, | |
2075 | struct xfs_da_args *args) | |
1da177e4 | 2076 | { |
517c2220 DC |
2077 | struct xfs_attr_leafblock *leaf; |
2078 | struct xfs_attr3_icleaf_hdr ichdr; | |
2079 | struct xfs_attr_leaf_entry *entry; | |
2080 | struct xfs_attr_leaf_entry *entries; | |
2081 | struct xfs_attr_leaf_name_local *name_loc; | |
2082 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2083 | xfs_dahash_t hashval; | |
2084 | int probe; | |
2085 | int span; | |
1da177e4 | 2086 | |
5a5881cd DC |
2087 | trace_xfs_attr_leaf_lookup(args); |
2088 | ||
1d9025e5 | 2089 | leaf = bp->b_addr; |
517c2220 DC |
2090 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
2091 | entries = xfs_attr3_leaf_entryp(leaf); | |
c2c4c477 | 2092 | ASSERT(ichdr.count < args->geo->blksize / 8); |
1da177e4 LT |
2093 | |
2094 | /* | |
2095 | * Binary search. (note: small blocks will skip this loop) | |
2096 | */ | |
2097 | hashval = args->hashval; | |
517c2220 DC |
2098 | probe = span = ichdr.count / 2; |
2099 | for (entry = &entries[probe]; span > 4; entry = &entries[probe]) { | |
1da177e4 | 2100 | span /= 2; |
6b19f2d8 | 2101 | if (be32_to_cpu(entry->hashval) < hashval) |
1da177e4 | 2102 | probe += span; |
6b19f2d8 | 2103 | else if (be32_to_cpu(entry->hashval) > hashval) |
1da177e4 LT |
2104 | probe -= span; |
2105 | else | |
2106 | break; | |
2107 | } | |
517c2220 DC |
2108 | ASSERT(probe >= 0 && (!ichdr.count || probe < ichdr.count)); |
2109 | ASSERT(span <= 4 || be32_to_cpu(entry->hashval) == hashval); | |
1da177e4 LT |
2110 | |
2111 | /* | |
2112 | * Since we may have duplicate hashval's, find the first matching | |
2113 | * hashval in the leaf. | |
2114 | */ | |
517c2220 | 2115 | while (probe > 0 && be32_to_cpu(entry->hashval) >= hashval) { |
1da177e4 LT |
2116 | entry--; |
2117 | probe--; | |
2118 | } | |
517c2220 DC |
2119 | while (probe < ichdr.count && |
2120 | be32_to_cpu(entry->hashval) < hashval) { | |
1da177e4 LT |
2121 | entry++; |
2122 | probe++; | |
2123 | } | |
517c2220 | 2124 | if (probe == ichdr.count || be32_to_cpu(entry->hashval) != hashval) { |
1da177e4 | 2125 | args->index = probe; |
b474c7ae | 2126 | return ENOATTR; |
1da177e4 LT |
2127 | } |
2128 | ||
2129 | /* | |
2130 | * Duplicate keys may be present, so search all of them for a match. | |
2131 | */ | |
517c2220 | 2132 | for (; probe < ichdr.count && (be32_to_cpu(entry->hashval) == hashval); |
1da177e4 LT |
2133 | entry++, probe++) { |
2134 | /* | |
2135 | * GROT: Add code to remove incomplete entries. | |
2136 | */ | |
2137 | /* | |
2138 | * If we are looking for INCOMPLETE entries, show only those. | |
2139 | * If we are looking for complete entries, show only those. | |
2140 | */ | |
2141 | if ((args->flags & XFS_ATTR_INCOMPLETE) != | |
2142 | (entry->flags & XFS_ATTR_INCOMPLETE)) { | |
2143 | continue; | |
2144 | } | |
2145 | if (entry->flags & XFS_ATTR_LOCAL) { | |
517c2220 | 2146 | name_loc = xfs_attr3_leaf_name_local(leaf, probe); |
1da177e4 LT |
2147 | if (name_loc->namelen != args->namelen) |
2148 | continue; | |
517c2220 DC |
2149 | if (memcmp(args->name, name_loc->nameval, |
2150 | args->namelen) != 0) | |
1da177e4 | 2151 | continue; |
726801ba | 2152 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
1da177e4 LT |
2153 | continue; |
2154 | args->index = probe; | |
b474c7ae | 2155 | return EEXIST; |
1da177e4 | 2156 | } else { |
517c2220 | 2157 | name_rmt = xfs_attr3_leaf_name_remote(leaf, probe); |
1da177e4 LT |
2158 | if (name_rmt->namelen != args->namelen) |
2159 | continue; | |
517c2220 DC |
2160 | if (memcmp(args->name, name_rmt->name, |
2161 | args->namelen) != 0) | |
1da177e4 | 2162 | continue; |
726801ba | 2163 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
1da177e4 LT |
2164 | continue; |
2165 | args->index = probe; | |
8275cdd0 | 2166 | args->rmtvaluelen = be32_to_cpu(name_rmt->valuelen); |
c0f054e7 | 2167 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
ad1858d7 DC |
2168 | args->rmtblkcnt = xfs_attr3_rmt_blocks( |
2169 | args->dp->i_mount, | |
8275cdd0 | 2170 | args->rmtvaluelen); |
b474c7ae | 2171 | return EEXIST; |
1da177e4 LT |
2172 | } |
2173 | } | |
2174 | args->index = probe; | |
b474c7ae | 2175 | return ENOATTR; |
1da177e4 LT |
2176 | } |
2177 | ||
2178 | /* | |
2179 | * Get the value associated with an attribute name from a leaf attribute | |
2180 | * list structure. | |
2181 | */ | |
2182 | int | |
517c2220 DC |
2183 | xfs_attr3_leaf_getvalue( |
2184 | struct xfs_buf *bp, | |
2185 | struct xfs_da_args *args) | |
1da177e4 | 2186 | { |
517c2220 DC |
2187 | struct xfs_attr_leafblock *leaf; |
2188 | struct xfs_attr3_icleaf_hdr ichdr; | |
2189 | struct xfs_attr_leaf_entry *entry; | |
2190 | struct xfs_attr_leaf_name_local *name_loc; | |
2191 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2192 | int valuelen; | |
1da177e4 | 2193 | |
1d9025e5 | 2194 | leaf = bp->b_addr; |
517c2220 | 2195 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
c2c4c477 | 2196 | ASSERT(ichdr.count < args->geo->blksize / 8); |
517c2220 | 2197 | ASSERT(args->index < ichdr.count); |
1da177e4 | 2198 | |
517c2220 | 2199 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
1da177e4 | 2200 | if (entry->flags & XFS_ATTR_LOCAL) { |
517c2220 | 2201 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
1da177e4 LT |
2202 | ASSERT(name_loc->namelen == args->namelen); |
2203 | ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0); | |
053b5758 | 2204 | valuelen = be16_to_cpu(name_loc->valuelen); |
1da177e4 LT |
2205 | if (args->flags & ATTR_KERNOVAL) { |
2206 | args->valuelen = valuelen; | |
517c2220 | 2207 | return 0; |
1da177e4 LT |
2208 | } |
2209 | if (args->valuelen < valuelen) { | |
2210 | args->valuelen = valuelen; | |
b474c7ae | 2211 | return ERANGE; |
1da177e4 LT |
2212 | } |
2213 | args->valuelen = valuelen; | |
2214 | memcpy(args->value, &name_loc->nameval[args->namelen], valuelen); | |
2215 | } else { | |
517c2220 | 2216 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2217 | ASSERT(name_rmt->namelen == args->namelen); |
2218 | ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0); | |
8275cdd0 | 2219 | args->rmtvaluelen = be32_to_cpu(name_rmt->valuelen); |
c0f054e7 | 2220 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
ad1858d7 | 2221 | args->rmtblkcnt = xfs_attr3_rmt_blocks(args->dp->i_mount, |
8275cdd0 | 2222 | args->rmtvaluelen); |
1da177e4 | 2223 | if (args->flags & ATTR_KERNOVAL) { |
8275cdd0 | 2224 | args->valuelen = args->rmtvaluelen; |
517c2220 | 2225 | return 0; |
1da177e4 | 2226 | } |
8275cdd0 DC |
2227 | if (args->valuelen < args->rmtvaluelen) { |
2228 | args->valuelen = args->rmtvaluelen; | |
b474c7ae | 2229 | return ERANGE; |
1da177e4 | 2230 | } |
8275cdd0 | 2231 | args->valuelen = args->rmtvaluelen; |
1da177e4 | 2232 | } |
517c2220 | 2233 | return 0; |
1da177e4 LT |
2234 | } |
2235 | ||
2236 | /*======================================================================== | |
2237 | * Utility routines. | |
2238 | *========================================================================*/ | |
2239 | ||
2240 | /* | |
2241 | * Move the indicated entries from one leaf to another. | |
2242 | * NOTE: this routine modifies both source and destination leaves. | |
2243 | */ | |
2244 | /*ARGSUSED*/ | |
2245 | STATIC void | |
517c2220 | 2246 | xfs_attr3_leaf_moveents( |
c2c4c477 | 2247 | struct xfs_da_args *args, |
517c2220 DC |
2248 | struct xfs_attr_leafblock *leaf_s, |
2249 | struct xfs_attr3_icleaf_hdr *ichdr_s, | |
2250 | int start_s, | |
2251 | struct xfs_attr_leafblock *leaf_d, | |
2252 | struct xfs_attr3_icleaf_hdr *ichdr_d, | |
2253 | int start_d, | |
c2c4c477 | 2254 | int count) |
1da177e4 | 2255 | { |
517c2220 DC |
2256 | struct xfs_attr_leaf_entry *entry_s; |
2257 | struct xfs_attr_leaf_entry *entry_d; | |
2258 | int desti; | |
2259 | int tmp; | |
2260 | int i; | |
1da177e4 LT |
2261 | |
2262 | /* | |
2263 | * Check for nothing to do. | |
2264 | */ | |
2265 | if (count == 0) | |
2266 | return; | |
2267 | ||
2268 | /* | |
2269 | * Set up environment. | |
2270 | */ | |
517c2220 DC |
2271 | ASSERT(ichdr_s->magic == XFS_ATTR_LEAF_MAGIC || |
2272 | ichdr_s->magic == XFS_ATTR3_LEAF_MAGIC); | |
2273 | ASSERT(ichdr_s->magic == ichdr_d->magic); | |
c2c4c477 | 2274 | ASSERT(ichdr_s->count > 0 && ichdr_s->count < args->geo->blksize / 8); |
517c2220 DC |
2275 | ASSERT(ichdr_s->firstused >= (ichdr_s->count * sizeof(*entry_s)) |
2276 | + xfs_attr3_leaf_hdr_size(leaf_s)); | |
c2c4c477 | 2277 | ASSERT(ichdr_d->count < args->geo->blksize / 8); |
517c2220 DC |
2278 | ASSERT(ichdr_d->firstused >= (ichdr_d->count * sizeof(*entry_d)) |
2279 | + xfs_attr3_leaf_hdr_size(leaf_d)); | |
2280 | ||
2281 | ASSERT(start_s < ichdr_s->count); | |
2282 | ASSERT(start_d <= ichdr_d->count); | |
2283 | ASSERT(count <= ichdr_s->count); | |
2284 | ||
1da177e4 LT |
2285 | |
2286 | /* | |
2287 | * Move the entries in the destination leaf up to make a hole? | |
2288 | */ | |
517c2220 DC |
2289 | if (start_d < ichdr_d->count) { |
2290 | tmp = ichdr_d->count - start_d; | |
1da177e4 | 2291 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
517c2220 DC |
2292 | entry_s = &xfs_attr3_leaf_entryp(leaf_d)[start_d]; |
2293 | entry_d = &xfs_attr3_leaf_entryp(leaf_d)[start_d + count]; | |
2294 | memmove(entry_d, entry_s, tmp); | |
1da177e4 LT |
2295 | } |
2296 | ||
2297 | /* | |
2298 | * Copy all entry's in the same (sorted) order, | |
2299 | * but allocate attribute info packed and in sequence. | |
2300 | */ | |
517c2220 DC |
2301 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
2302 | entry_d = &xfs_attr3_leaf_entryp(leaf_d)[start_d]; | |
1da177e4 LT |
2303 | desti = start_d; |
2304 | for (i = 0; i < count; entry_s++, entry_d++, desti++, i++) { | |
517c2220 | 2305 | ASSERT(be16_to_cpu(entry_s->nameidx) >= ichdr_s->firstused); |
1da177e4 LT |
2306 | tmp = xfs_attr_leaf_entsize(leaf_s, start_s + i); |
2307 | #ifdef GROT | |
2308 | /* | |
2309 | * Code to drop INCOMPLETE entries. Difficult to use as we | |
2310 | * may also need to change the insertion index. Code turned | |
2311 | * off for 6.2, should be revisited later. | |
2312 | */ | |
2313 | if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */ | |
517c2220 DC |
2314 | memset(xfs_attr3_leaf_name(leaf_s, start_s + i), 0, tmp); |
2315 | ichdr_s->usedbytes -= tmp; | |
2316 | ichdr_s->count -= 1; | |
1da177e4 LT |
2317 | entry_d--; /* to compensate for ++ in loop hdr */ |
2318 | desti--; | |
2319 | if ((start_s + i) < offset) | |
2320 | result++; /* insertion index adjustment */ | |
2321 | } else { | |
2322 | #endif /* GROT */ | |
517c2220 | 2323 | ichdr_d->firstused -= tmp; |
1da177e4 LT |
2324 | /* both on-disk, don't endian flip twice */ |
2325 | entry_d->hashval = entry_s->hashval; | |
517c2220 | 2326 | entry_d->nameidx = cpu_to_be16(ichdr_d->firstused); |
1da177e4 | 2327 | entry_d->flags = entry_s->flags; |
6b19f2d8 | 2328 | ASSERT(be16_to_cpu(entry_d->nameidx) + tmp |
c2c4c477 | 2329 | <= args->geo->blksize); |
517c2220 DC |
2330 | memmove(xfs_attr3_leaf_name(leaf_d, desti), |
2331 | xfs_attr3_leaf_name(leaf_s, start_s + i), tmp); | |
6b19f2d8 | 2332 | ASSERT(be16_to_cpu(entry_s->nameidx) + tmp |
c2c4c477 | 2333 | <= args->geo->blksize); |
517c2220 DC |
2334 | memset(xfs_attr3_leaf_name(leaf_s, start_s + i), 0, tmp); |
2335 | ichdr_s->usedbytes -= tmp; | |
2336 | ichdr_d->usedbytes += tmp; | |
2337 | ichdr_s->count -= 1; | |
2338 | ichdr_d->count += 1; | |
2339 | tmp = ichdr_d->count * sizeof(xfs_attr_leaf_entry_t) | |
2340 | + xfs_attr3_leaf_hdr_size(leaf_d); | |
2341 | ASSERT(ichdr_d->firstused >= tmp); | |
1da177e4 LT |
2342 | #ifdef GROT |
2343 | } | |
2344 | #endif /* GROT */ | |
2345 | } | |
2346 | ||
2347 | /* | |
2348 | * Zero out the entries we just copied. | |
2349 | */ | |
517c2220 | 2350 | if (start_s == ichdr_s->count) { |
1da177e4 | 2351 | tmp = count * sizeof(xfs_attr_leaf_entry_t); |
517c2220 | 2352 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
1da177e4 | 2353 | ASSERT(((char *)entry_s + tmp) <= |
c2c4c477 | 2354 | ((char *)leaf_s + args->geo->blksize)); |
517c2220 | 2355 | memset(entry_s, 0, tmp); |
1da177e4 LT |
2356 | } else { |
2357 | /* | |
2358 | * Move the remaining entries down to fill the hole, | |
2359 | * then zero the entries at the top. | |
2360 | */ | |
517c2220 DC |
2361 | tmp = (ichdr_s->count - count) * sizeof(xfs_attr_leaf_entry_t); |
2362 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s + count]; | |
2363 | entry_d = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; | |
2364 | memmove(entry_d, entry_s, tmp); | |
1da177e4 LT |
2365 | |
2366 | tmp = count * sizeof(xfs_attr_leaf_entry_t); | |
517c2220 | 2367 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[ichdr_s->count]; |
1da177e4 | 2368 | ASSERT(((char *)entry_s + tmp) <= |
c2c4c477 | 2369 | ((char *)leaf_s + args->geo->blksize)); |
517c2220 | 2370 | memset(entry_s, 0, tmp); |
1da177e4 LT |
2371 | } |
2372 | ||
2373 | /* | |
2374 | * Fill in the freemap information | |
2375 | */ | |
517c2220 DC |
2376 | ichdr_d->freemap[0].base = xfs_attr3_leaf_hdr_size(leaf_d); |
2377 | ichdr_d->freemap[0].base += ichdr_d->count * sizeof(xfs_attr_leaf_entry_t); | |
2378 | ichdr_d->freemap[0].size = ichdr_d->firstused - ichdr_d->freemap[0].base; | |
2379 | ichdr_d->freemap[1].base = 0; | |
2380 | ichdr_d->freemap[2].base = 0; | |
2381 | ichdr_d->freemap[1].size = 0; | |
2382 | ichdr_d->freemap[2].size = 0; | |
2383 | ichdr_s->holes = 1; /* leaf may not be compact */ | |
1da177e4 LT |
2384 | } |
2385 | ||
2386 | /* | |
2387 | * Pick up the last hashvalue from a leaf block. | |
2388 | */ | |
2389 | xfs_dahash_t | |
1d9025e5 DC |
2390 | xfs_attr_leaf_lasthash( |
2391 | struct xfs_buf *bp, | |
2392 | int *count) | |
1da177e4 | 2393 | { |
517c2220 DC |
2394 | struct xfs_attr3_icleaf_hdr ichdr; |
2395 | struct xfs_attr_leaf_entry *entries; | |
1da177e4 | 2396 | |
517c2220 DC |
2397 | xfs_attr3_leaf_hdr_from_disk(&ichdr, bp->b_addr); |
2398 | entries = xfs_attr3_leaf_entryp(bp->b_addr); | |
1da177e4 | 2399 | if (count) |
517c2220 DC |
2400 | *count = ichdr.count; |
2401 | if (!ichdr.count) | |
2402 | return 0; | |
2403 | return be32_to_cpu(entries[ichdr.count - 1].hashval); | |
1da177e4 LT |
2404 | } |
2405 | ||
2406 | /* | |
2407 | * Calculate the number of bytes used to store the indicated attribute | |
2408 | * (whether local or remote only calculate bytes in this block). | |
2409 | */ | |
ba0f32d4 | 2410 | STATIC int |
1da177e4 LT |
2411 | xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index) |
2412 | { | |
517c2220 | 2413 | struct xfs_attr_leaf_entry *entries; |
1da177e4 LT |
2414 | xfs_attr_leaf_name_local_t *name_loc; |
2415 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2416 | int size; | |
2417 | ||
517c2220 DC |
2418 | entries = xfs_attr3_leaf_entryp(leaf); |
2419 | if (entries[index].flags & XFS_ATTR_LOCAL) { | |
2420 | name_loc = xfs_attr3_leaf_name_local(leaf, index); | |
c9fb86a9 | 2421 | size = xfs_attr_leaf_entsize_local(name_loc->namelen, |
053b5758 | 2422 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 | 2423 | } else { |
517c2220 | 2424 | name_rmt = xfs_attr3_leaf_name_remote(leaf, index); |
c9fb86a9 | 2425 | size = xfs_attr_leaf_entsize_remote(name_rmt->namelen); |
1da177e4 | 2426 | } |
517c2220 | 2427 | return size; |
1da177e4 LT |
2428 | } |
2429 | ||
2430 | /* | |
2431 | * Calculate the number of bytes that would be required to store the new | |
2432 | * attribute (whether local or remote only calculate bytes in this block). | |
2433 | * This routine decides as a side effect whether the attribute will be | |
2434 | * a "local" or a "remote" attribute. | |
2435 | */ | |
2436 | int | |
c59f0ad2 DC |
2437 | xfs_attr_leaf_newentsize( |
2438 | struct xfs_da_args *args, | |
2439 | int *local) | |
1da177e4 | 2440 | { |
c59f0ad2 | 2441 | int size; |
1da177e4 | 2442 | |
c59f0ad2 DC |
2443 | size = xfs_attr_leaf_entsize_local(args->namelen, args->valuelen); |
2444 | if (size < xfs_attr_leaf_entsize_local_max(args->geo->blksize)) { | |
2445 | if (local) | |
1da177e4 | 2446 | *local = 1; |
c59f0ad2 | 2447 | return size; |
1da177e4 | 2448 | } |
c59f0ad2 DC |
2449 | if (local) |
2450 | *local = 0; | |
2451 | return xfs_attr_leaf_entsize_remote(args->namelen); | |
1da177e4 LT |
2452 | } |
2453 | ||
1da177e4 LT |
2454 | |
2455 | /*======================================================================== | |
2456 | * Manage the INCOMPLETE flag in a leaf entry | |
2457 | *========================================================================*/ | |
2458 | ||
2459 | /* | |
2460 | * Clear the INCOMPLETE flag on an entry in a leaf block. | |
2461 | */ | |
2462 | int | |
517c2220 DC |
2463 | xfs_attr3_leaf_clearflag( |
2464 | struct xfs_da_args *args) | |
1da177e4 | 2465 | { |
517c2220 DC |
2466 | struct xfs_attr_leafblock *leaf; |
2467 | struct xfs_attr_leaf_entry *entry; | |
2468 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2469 | struct xfs_buf *bp; | |
2470 | int error; | |
1da177e4 | 2471 | #ifdef DEBUG |
517c2220 | 2472 | struct xfs_attr3_icleaf_hdr ichdr; |
1da177e4 LT |
2473 | xfs_attr_leaf_name_local_t *name_loc; |
2474 | int namelen; | |
2475 | char *name; | |
2476 | #endif /* DEBUG */ | |
2477 | ||
5a5881cd | 2478 | trace_xfs_attr_leaf_clearflag(args); |
1da177e4 LT |
2479 | /* |
2480 | * Set up the operation. | |
2481 | */ | |
517c2220 | 2482 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); |
ad14c33a | 2483 | if (error) |
d99831ff | 2484 | return error; |
1da177e4 | 2485 | |
1d9025e5 | 2486 | leaf = bp->b_addr; |
517c2220 | 2487 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
1da177e4 LT |
2488 | ASSERT(entry->flags & XFS_ATTR_INCOMPLETE); |
2489 | ||
2490 | #ifdef DEBUG | |
517c2220 DC |
2491 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
2492 | ASSERT(args->index < ichdr.count); | |
2493 | ASSERT(args->index >= 0); | |
2494 | ||
1da177e4 | 2495 | if (entry->flags & XFS_ATTR_LOCAL) { |
517c2220 | 2496 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
1da177e4 LT |
2497 | namelen = name_loc->namelen; |
2498 | name = (char *)name_loc->nameval; | |
2499 | } else { | |
517c2220 | 2500 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2501 | namelen = name_rmt->namelen; |
2502 | name = (char *)name_rmt->name; | |
2503 | } | |
6b19f2d8 | 2504 | ASSERT(be32_to_cpu(entry->hashval) == args->hashval); |
1da177e4 LT |
2505 | ASSERT(namelen == args->namelen); |
2506 | ASSERT(memcmp(name, args->name, namelen) == 0); | |
2507 | #endif /* DEBUG */ | |
2508 | ||
2509 | entry->flags &= ~XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2510 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2511 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
2512 | ||
2513 | if (args->rmtblkno) { | |
2514 | ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0); | |
517c2220 | 2515 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
c0f054e7 | 2516 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
8275cdd0 | 2517 | name_rmt->valuelen = cpu_to_be32(args->rmtvaluelen); |
1d9025e5 | 2518 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2519 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); |
2520 | } | |
1da177e4 LT |
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 | |
517c2220 DC |
2532 | xfs_attr3_leaf_setflag( |
2533 | struct xfs_da_args *args) | |
1da177e4 | 2534 | { |
517c2220 DC |
2535 | struct xfs_attr_leafblock *leaf; |
2536 | struct xfs_attr_leaf_entry *entry; | |
2537 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2538 | struct xfs_buf *bp; | |
1da177e4 | 2539 | int error; |
517c2220 DC |
2540 | #ifdef DEBUG |
2541 | struct xfs_attr3_icleaf_hdr ichdr; | |
2542 | #endif | |
1da177e4 | 2543 | |
5a5881cd DC |
2544 | trace_xfs_attr_leaf_setflag(args); |
2545 | ||
1da177e4 LT |
2546 | /* |
2547 | * Set up the operation. | |
2548 | */ | |
517c2220 | 2549 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); |
ad14c33a | 2550 | if (error) |
d99831ff | 2551 | return error; |
1da177e4 | 2552 | |
1d9025e5 | 2553 | leaf = bp->b_addr; |
517c2220 DC |
2554 | #ifdef DEBUG |
2555 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); | |
2556 | ASSERT(args->index < ichdr.count); | |
1da177e4 | 2557 | ASSERT(args->index >= 0); |
517c2220 DC |
2558 | #endif |
2559 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; | |
1da177e4 LT |
2560 | |
2561 | ASSERT((entry->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2562 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2563 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2564 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
2565 | if ((entry->flags & XFS_ATTR_LOCAL) == 0) { | |
517c2220 | 2566 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2567 | name_rmt->valueblk = 0; |
2568 | name_rmt->valuelen = 0; | |
1d9025e5 | 2569 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2570 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); |
2571 | } | |
1da177e4 LT |
2572 | |
2573 | /* | |
2574 | * Commit the flag value change and start the next trans in series. | |
2575 | */ | |
322ff6b8 | 2576 | return xfs_trans_roll(&args->trans, args->dp); |
1da177e4 LT |
2577 | } |
2578 | ||
2579 | /* | |
2580 | * In a single transaction, clear the INCOMPLETE flag on the leaf entry | |
2581 | * given by args->blkno/index and set the INCOMPLETE flag on the leaf | |
2582 | * entry given by args->blkno2/index2. | |
2583 | * | |
2584 | * Note that they could be in different blocks, or in the same block. | |
2585 | */ | |
2586 | int | |
517c2220 DC |
2587 | xfs_attr3_leaf_flipflags( |
2588 | struct xfs_da_args *args) | |
1da177e4 | 2589 | { |
517c2220 DC |
2590 | struct xfs_attr_leafblock *leaf1; |
2591 | struct xfs_attr_leafblock *leaf2; | |
2592 | struct xfs_attr_leaf_entry *entry1; | |
2593 | struct xfs_attr_leaf_entry *entry2; | |
2594 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2595 | struct xfs_buf *bp1; | |
2596 | struct xfs_buf *bp2; | |
1da177e4 LT |
2597 | int error; |
2598 | #ifdef DEBUG | |
517c2220 DC |
2599 | struct xfs_attr3_icleaf_hdr ichdr1; |
2600 | struct xfs_attr3_icleaf_hdr ichdr2; | |
1da177e4 LT |
2601 | xfs_attr_leaf_name_local_t *name_loc; |
2602 | int namelen1, namelen2; | |
2603 | char *name1, *name2; | |
2604 | #endif /* DEBUG */ | |
2605 | ||
5a5881cd DC |
2606 | trace_xfs_attr_leaf_flipflags(args); |
2607 | ||
1da177e4 LT |
2608 | /* |
2609 | * Read the block containing the "old" attr | |
2610 | */ | |
517c2220 | 2611 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp1); |
ad14c33a DC |
2612 | if (error) |
2613 | return error; | |
1da177e4 LT |
2614 | |
2615 | /* | |
2616 | * Read the block containing the "new" attr, if it is different | |
2617 | */ | |
2618 | if (args->blkno2 != args->blkno) { | |
517c2220 | 2619 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno2, |
ad14c33a DC |
2620 | -1, &bp2); |
2621 | if (error) | |
2622 | return error; | |
1da177e4 LT |
2623 | } else { |
2624 | bp2 = bp1; | |
2625 | } | |
2626 | ||
1d9025e5 | 2627 | leaf1 = bp1->b_addr; |
517c2220 | 2628 | entry1 = &xfs_attr3_leaf_entryp(leaf1)[args->index]; |
1da177e4 | 2629 | |
1d9025e5 | 2630 | leaf2 = bp2->b_addr; |
517c2220 | 2631 | entry2 = &xfs_attr3_leaf_entryp(leaf2)[args->index2]; |
1da177e4 LT |
2632 | |
2633 | #ifdef DEBUG | |
517c2220 DC |
2634 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1); |
2635 | ASSERT(args->index < ichdr1.count); | |
2636 | ASSERT(args->index >= 0); | |
2637 | ||
2638 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2); | |
2639 | ASSERT(args->index2 < ichdr2.count); | |
2640 | ASSERT(args->index2 >= 0); | |
2641 | ||
1da177e4 | 2642 | if (entry1->flags & XFS_ATTR_LOCAL) { |
517c2220 | 2643 | name_loc = xfs_attr3_leaf_name_local(leaf1, args->index); |
1da177e4 LT |
2644 | namelen1 = name_loc->namelen; |
2645 | name1 = (char *)name_loc->nameval; | |
2646 | } else { | |
517c2220 | 2647 | name_rmt = xfs_attr3_leaf_name_remote(leaf1, args->index); |
1da177e4 LT |
2648 | namelen1 = name_rmt->namelen; |
2649 | name1 = (char *)name_rmt->name; | |
2650 | } | |
2651 | if (entry2->flags & XFS_ATTR_LOCAL) { | |
517c2220 | 2652 | name_loc = xfs_attr3_leaf_name_local(leaf2, args->index2); |
1da177e4 LT |
2653 | namelen2 = name_loc->namelen; |
2654 | name2 = (char *)name_loc->nameval; | |
2655 | } else { | |
517c2220 | 2656 | name_rmt = xfs_attr3_leaf_name_remote(leaf2, args->index2); |
1da177e4 LT |
2657 | namelen2 = name_rmt->namelen; |
2658 | name2 = (char *)name_rmt->name; | |
2659 | } | |
6b19f2d8 | 2660 | ASSERT(be32_to_cpu(entry1->hashval) == be32_to_cpu(entry2->hashval)); |
1da177e4 LT |
2661 | ASSERT(namelen1 == namelen2); |
2662 | ASSERT(memcmp(name1, name2, namelen1) == 0); | |
2663 | #endif /* DEBUG */ | |
2664 | ||
2665 | ASSERT(entry1->flags & XFS_ATTR_INCOMPLETE); | |
2666 | ASSERT((entry2->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2667 | ||
2668 | entry1->flags &= ~XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2669 | xfs_trans_log_buf(args->trans, bp1, |
1da177e4 LT |
2670 | XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1))); |
2671 | if (args->rmtblkno) { | |
2672 | ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0); | |
517c2220 | 2673 | name_rmt = xfs_attr3_leaf_name_remote(leaf1, args->index); |
c0f054e7 | 2674 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
8275cdd0 | 2675 | name_rmt->valuelen = cpu_to_be32(args->rmtvaluelen); |
1d9025e5 | 2676 | xfs_trans_log_buf(args->trans, bp1, |
1da177e4 LT |
2677 | XFS_DA_LOGRANGE(leaf1, name_rmt, sizeof(*name_rmt))); |
2678 | } | |
2679 | ||
2680 | entry2->flags |= XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2681 | xfs_trans_log_buf(args->trans, bp2, |
1da177e4 LT |
2682 | XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2))); |
2683 | if ((entry2->flags & XFS_ATTR_LOCAL) == 0) { | |
517c2220 | 2684 | name_rmt = xfs_attr3_leaf_name_remote(leaf2, args->index2); |
1da177e4 LT |
2685 | name_rmt->valueblk = 0; |
2686 | name_rmt->valuelen = 0; | |
1d9025e5 | 2687 | xfs_trans_log_buf(args->trans, bp2, |
1da177e4 LT |
2688 | XFS_DA_LOGRANGE(leaf2, name_rmt, sizeof(*name_rmt))); |
2689 | } | |
1da177e4 LT |
2690 | |
2691 | /* | |
2692 | * Commit the flag value change and start the next trans in series. | |
2693 | */ | |
322ff6b8 | 2694 | error = xfs_trans_roll(&args->trans, args->dp); |
1da177e4 | 2695 | |
517c2220 | 2696 | return error; |
1da177e4 | 2697 | } |