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 | */ | |
517c2220 DC |
83 | STATIC void xfs_attr3_leaf_moveents(struct xfs_attr_leafblock *src_leaf, |
84 | struct xfs_attr3_icleaf_hdr *src_ichdr, int src_start, | |
85 | struct xfs_attr_leafblock *dst_leaf, | |
86 | struct xfs_attr3_icleaf_hdr *dst_ichdr, int dst_start, | |
87 | int move_count, struct xfs_mount *mp); | |
ba0f32d4 | 88 | STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index); |
726801ba | 89 | |
517c2220 DC |
90 | void |
91 | xfs_attr3_leaf_hdr_from_disk( | |
92 | struct xfs_attr3_icleaf_hdr *to, | |
93 | struct xfs_attr_leafblock *from) | |
94 | { | |
95 | int i; | |
96 | ||
97 | ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC) || | |
98 | from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)); | |
99 | ||
100 | if (from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)) { | |
101 | struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)from; | |
102 | ||
103 | to->forw = be32_to_cpu(hdr3->info.hdr.forw); | |
104 | to->back = be32_to_cpu(hdr3->info.hdr.back); | |
105 | to->magic = be16_to_cpu(hdr3->info.hdr.magic); | |
106 | to->count = be16_to_cpu(hdr3->count); | |
107 | to->usedbytes = be16_to_cpu(hdr3->usedbytes); | |
108 | to->firstused = be16_to_cpu(hdr3->firstused); | |
109 | to->holes = hdr3->holes; | |
110 | ||
111 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
112 | to->freemap[i].base = be16_to_cpu(hdr3->freemap[i].base); | |
113 | to->freemap[i].size = be16_to_cpu(hdr3->freemap[i].size); | |
114 | } | |
115 | return; | |
116 | } | |
117 | to->forw = be32_to_cpu(from->hdr.info.forw); | |
118 | to->back = be32_to_cpu(from->hdr.info.back); | |
119 | to->magic = be16_to_cpu(from->hdr.info.magic); | |
120 | to->count = be16_to_cpu(from->hdr.count); | |
121 | to->usedbytes = be16_to_cpu(from->hdr.usedbytes); | |
122 | to->firstused = be16_to_cpu(from->hdr.firstused); | |
123 | to->holes = from->hdr.holes; | |
124 | ||
125 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
126 | to->freemap[i].base = be16_to_cpu(from->hdr.freemap[i].base); | |
127 | to->freemap[i].size = be16_to_cpu(from->hdr.freemap[i].size); | |
128 | } | |
129 | } | |
130 | ||
131 | void | |
132 | xfs_attr3_leaf_hdr_to_disk( | |
133 | struct xfs_attr_leafblock *to, | |
134 | struct xfs_attr3_icleaf_hdr *from) | |
135 | { | |
136 | int i; | |
137 | ||
138 | ASSERT(from->magic == XFS_ATTR_LEAF_MAGIC || | |
139 | from->magic == XFS_ATTR3_LEAF_MAGIC); | |
140 | ||
141 | if (from->magic == XFS_ATTR3_LEAF_MAGIC) { | |
142 | struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)to; | |
143 | ||
144 | hdr3->info.hdr.forw = cpu_to_be32(from->forw); | |
145 | hdr3->info.hdr.back = cpu_to_be32(from->back); | |
146 | hdr3->info.hdr.magic = cpu_to_be16(from->magic); | |
147 | hdr3->count = cpu_to_be16(from->count); | |
148 | hdr3->usedbytes = cpu_to_be16(from->usedbytes); | |
149 | hdr3->firstused = cpu_to_be16(from->firstused); | |
150 | hdr3->holes = from->holes; | |
151 | hdr3->pad1 = 0; | |
152 | ||
153 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
154 | hdr3->freemap[i].base = cpu_to_be16(from->freemap[i].base); | |
155 | hdr3->freemap[i].size = cpu_to_be16(from->freemap[i].size); | |
156 | } | |
157 | return; | |
158 | } | |
159 | to->hdr.info.forw = cpu_to_be32(from->forw); | |
160 | to->hdr.info.back = cpu_to_be32(from->back); | |
161 | to->hdr.info.magic = cpu_to_be16(from->magic); | |
162 | to->hdr.count = cpu_to_be16(from->count); | |
163 | to->hdr.usedbytes = cpu_to_be16(from->usedbytes); | |
164 | to->hdr.firstused = cpu_to_be16(from->firstused); | |
165 | to->hdr.holes = from->holes; | |
166 | to->hdr.pad1 = 0; | |
167 | ||
168 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
169 | to->hdr.freemap[i].base = cpu_to_be16(from->freemap[i].base); | |
170 | to->hdr.freemap[i].size = cpu_to_be16(from->freemap[i].size); | |
171 | } | |
172 | } | |
173 | ||
174 | static bool | |
175 | xfs_attr3_leaf_verify( | |
ad14c33a DC |
176 | struct xfs_buf *bp) |
177 | { | |
178 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
517c2220 DC |
179 | struct xfs_attr_leafblock *leaf = bp->b_addr; |
180 | struct xfs_attr3_icleaf_hdr ichdr; | |
ad14c33a | 181 | |
517c2220 DC |
182 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
183 | ||
184 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
185 | struct xfs_da3_node_hdr *hdr3 = bp->b_addr; | |
186 | ||
187 | if (ichdr.magic != XFS_ATTR3_LEAF_MAGIC) | |
188 | return false; | |
189 | ||
190 | if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_uuid)) | |
191 | return false; | |
192 | if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn) | |
193 | return false; | |
194 | } else { | |
195 | if (ichdr.magic != XFS_ATTR_LEAF_MAGIC) | |
196 | return false; | |
ad14c33a | 197 | } |
517c2220 DC |
198 | if (ichdr.count == 0) |
199 | return false; | |
200 | ||
201 | /* XXX: need to range check rest of attr header values */ | |
202 | /* XXX: hash order check? */ | |
203 | ||
204 | return true; | |
612cfbfe DC |
205 | } |
206 | ||
207 | static void | |
517c2220 | 208 | xfs_attr3_leaf_write_verify( |
612cfbfe DC |
209 | struct xfs_buf *bp) |
210 | { | |
517c2220 DC |
211 | struct xfs_mount *mp = bp->b_target->bt_mount; |
212 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
213 | struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr; | |
214 | ||
215 | if (!xfs_attr3_leaf_verify(bp)) { | |
216 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); | |
217 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
218 | return; | |
219 | } | |
220 | ||
221 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
222 | return; | |
223 | ||
224 | if (bip) | |
225 | hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
226 | ||
227 | xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_ATTR3_LEAF_CRC_OFF); | |
612cfbfe | 228 | } |
ad14c33a | 229 | |
517c2220 DC |
230 | /* |
231 | * leaf/node format detection on trees is sketchy, so a node read can be done on | |
232 | * leaf level blocks when detection identifies the tree as a node format tree | |
233 | * incorrectly. In this case, we need to swap the verifier to match the correct | |
234 | * format of the block being read. | |
235 | */ | |
1813dd64 | 236 | static void |
517c2220 DC |
237 | xfs_attr3_leaf_read_verify( |
238 | struct xfs_buf *bp) | |
612cfbfe | 239 | { |
517c2220 DC |
240 | struct xfs_mount *mp = bp->b_target->bt_mount; |
241 | ||
242 | if ((xfs_sb_version_hascrc(&mp->m_sb) && | |
243 | !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length), | |
244 | XFS_ATTR3_LEAF_CRC_OFF)) || | |
245 | !xfs_attr3_leaf_verify(bp)) { | |
246 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); | |
247 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
248 | } | |
ad14c33a DC |
249 | } |
250 | ||
517c2220 DC |
251 | const struct xfs_buf_ops xfs_attr3_leaf_buf_ops = { |
252 | .verify_read = xfs_attr3_leaf_read_verify, | |
253 | .verify_write = xfs_attr3_leaf_write_verify, | |
1813dd64 | 254 | }; |
612cfbfe | 255 | |
ad14c33a | 256 | int |
517c2220 | 257 | xfs_attr3_leaf_read( |
ad14c33a DC |
258 | struct xfs_trans *tp, |
259 | struct xfs_inode *dp, | |
260 | xfs_dablk_t bno, | |
261 | xfs_daddr_t mappedbno, | |
262 | struct xfs_buf **bpp) | |
263 | { | |
d75afeb3 DC |
264 | int err; |
265 | ||
266 | err = xfs_da_read_buf(tp, dp, bno, mappedbno, bpp, | |
517c2220 | 267 | XFS_ATTR_FORK, &xfs_attr3_leaf_buf_ops); |
d75afeb3 | 268 | if (!err && tp) |
61fe135c | 269 | xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_ATTR_LEAF_BUF); |
d75afeb3 | 270 | return err; |
ad14c33a DC |
271 | } |
272 | ||
726801ba TS |
273 | /*======================================================================== |
274 | * Namespace helper routines | |
275 | *========================================================================*/ | |
276 | ||
726801ba TS |
277 | /* |
278 | * If namespace bits don't match return 0. | |
279 | * If all match then return 1. | |
280 | */ | |
b8f82a4a | 281 | STATIC int |
726801ba TS |
282 | xfs_attr_namesp_match(int arg_flags, int ondisk_flags) |
283 | { | |
284 | return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags); | |
285 | } | |
286 | ||
1da177e4 LT |
287 | |
288 | /*======================================================================== | |
d8cc890d | 289 | * External routines when attribute fork size < XFS_LITINO(mp). |
1da177e4 LT |
290 | *========================================================================*/ |
291 | ||
292 | /* | |
d8cc890d NS |
293 | * Query whether the requested number of additional bytes of extended |
294 | * attribute space will be able to fit inline. | |
4c393a60 | 295 | * |
d8cc890d NS |
296 | * Returns zero if not, else the di_forkoff fork offset to be used in the |
297 | * literal area for attribute data once the new bytes have been added. | |
298 | * | |
299 | * di_forkoff must be 8 byte aligned, hence is stored as a >>3 value; | |
300 | * special case for dev/uuid inodes, they have fixed size data forks. | |
1da177e4 LT |
301 | */ |
302 | int | |
d8cc890d NS |
303 | xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes) |
304 | { | |
305 | int offset; | |
306 | int minforkoff; /* lower limit on valid forkoff locations */ | |
307 | int maxforkoff; /* upper limit on valid forkoff locations */ | |
4c393a60 | 308 | int dsize; |
d8cc890d NS |
309 | xfs_mount_t *mp = dp->i_mount; |
310 | ||
56cea2d0 CH |
311 | /* rounded down */ |
312 | offset = (XFS_LITINO(mp, dp->i_d.di_version) - bytes) >> 3; | |
d8cc890d NS |
313 | |
314 | switch (dp->i_d.di_format) { | |
315 | case XFS_DINODE_FMT_DEV: | |
316 | minforkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
317 | return (offset >= minforkoff) ? minforkoff : 0; | |
318 | case XFS_DINODE_FMT_UUID: | |
319 | minforkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
320 | return (offset >= minforkoff) ? minforkoff : 0; | |
321 | } | |
322 | ||
4c393a60 CH |
323 | /* |
324 | * If the requested numbers of bytes is smaller or equal to the | |
325 | * current attribute fork size we can always proceed. | |
326 | * | |
327 | * Note that if_bytes in the data fork might actually be larger than | |
328 | * the current data fork size is due to delalloc extents. In that | |
329 | * case either the extent count will go down when they are converted | |
330 | * to real extents, or the delalloc conversion will take care of the | |
331 | * literal area rebalancing. | |
332 | */ | |
333 | if (bytes <= XFS_IFORK_ASIZE(dp)) | |
334 | return dp->i_d.di_forkoff; | |
335 | ||
336 | /* | |
337 | * For attr2 we can try to move the forkoff if there is space in the | |
338 | * literal area, but for the old format we are done if there is no | |
339 | * space in the fixed attribute fork. | |
340 | */ | |
341 | if (!(mp->m_flags & XFS_MOUNT_ATTR2)) | |
da087bad | 342 | return 0; |
da087bad | 343 | |
e5889e90 | 344 | dsize = dp->i_df.if_bytes; |
4c393a60 | 345 | |
e5889e90 BN |
346 | switch (dp->i_d.di_format) { |
347 | case XFS_DINODE_FMT_EXTENTS: | |
4c393a60 | 348 | /* |
e5889e90 | 349 | * If there is no attr fork and the data fork is extents, |
4c393a60 CH |
350 | * determine if creating the default attr fork will result |
351 | * in the extents form migrating to btree. If so, the | |
352 | * minimum offset only needs to be the space required for | |
e5889e90 | 353 | * the btree root. |
4c393a60 | 354 | */ |
1a5902c5 CH |
355 | if (!dp->i_d.di_forkoff && dp->i_df.if_bytes > |
356 | xfs_default_attroffset(dp)) | |
e5889e90 BN |
357 | dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS); |
358 | break; | |
e5889e90 BN |
359 | case XFS_DINODE_FMT_BTREE: |
360 | /* | |
4c393a60 CH |
361 | * If we have a data btree then keep forkoff if we have one, |
362 | * otherwise we are adding a new attr, so then we set | |
363 | * minforkoff to where the btree root can finish so we have | |
e5889e90 BN |
364 | * plenty of room for attrs |
365 | */ | |
366 | if (dp->i_d.di_forkoff) { | |
4c393a60 | 367 | if (offset < dp->i_d.di_forkoff) |
e5889e90 | 368 | return 0; |
4c393a60 CH |
369 | return dp->i_d.di_forkoff; |
370 | } | |
ee1a47ab | 371 | dsize = XFS_BMAP_BROOT_SPACE(mp, dp->i_df.if_broot); |
e5889e90 BN |
372 | break; |
373 | } | |
4c393a60 CH |
374 | |
375 | /* | |
376 | * A data fork btree root must have space for at least | |
e5889e90 BN |
377 | * MINDBTPTRS key/ptr pairs if the data fork is small or empty. |
378 | */ | |
379 | minforkoff = MAX(dsize, XFS_BMDR_SPACE_CALC(MINDBTPTRS)); | |
d8cc890d NS |
380 | minforkoff = roundup(minforkoff, 8) >> 3; |
381 | ||
382 | /* attr fork btree root can have at least this many key/ptr pairs */ | |
56cea2d0 CH |
383 | maxforkoff = XFS_LITINO(mp, dp->i_d.di_version) - |
384 | XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
d8cc890d NS |
385 | maxforkoff = maxforkoff >> 3; /* rounded down */ |
386 | ||
d8cc890d NS |
387 | if (offset >= maxforkoff) |
388 | return maxforkoff; | |
4c393a60 CH |
389 | if (offset >= minforkoff) |
390 | return offset; | |
d8cc890d NS |
391 | return 0; |
392 | } | |
393 | ||
394 | /* | |
395 | * Switch on the ATTR2 superblock bit (implies also FEATURES2) | |
396 | */ | |
397 | STATIC void | |
398 | xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp) | |
399 | { | |
13059ff0 | 400 | if ((mp->m_flags & XFS_MOUNT_ATTR2) && |
62118709 | 401 | !(xfs_sb_version_hasattr2(&mp->m_sb))) { |
3685c2a1 | 402 | spin_lock(&mp->m_sb_lock); |
62118709 ES |
403 | if (!xfs_sb_version_hasattr2(&mp->m_sb)) { |
404 | xfs_sb_version_addattr2(&mp->m_sb); | |
3685c2a1 | 405 | spin_unlock(&mp->m_sb_lock); |
d8cc890d NS |
406 | xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); |
407 | } else | |
3685c2a1 | 408 | spin_unlock(&mp->m_sb_lock); |
d8cc890d NS |
409 | } |
410 | } | |
411 | ||
412 | /* | |
413 | * Create the initial contents of a shortform attribute list. | |
414 | */ | |
415 | void | |
1da177e4 LT |
416 | xfs_attr_shortform_create(xfs_da_args_t *args) |
417 | { | |
418 | xfs_attr_sf_hdr_t *hdr; | |
419 | xfs_inode_t *dp; | |
420 | xfs_ifork_t *ifp; | |
421 | ||
5a5881cd DC |
422 | trace_xfs_attr_sf_create(args); |
423 | ||
1da177e4 LT |
424 | dp = args->dp; |
425 | ASSERT(dp != NULL); | |
426 | ifp = dp->i_afp; | |
427 | ASSERT(ifp != NULL); | |
428 | ASSERT(ifp->if_bytes == 0); | |
429 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) { | |
430 | ifp->if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
431 | dp->i_d.di_aformat = XFS_DINODE_FMT_LOCAL; | |
432 | ifp->if_flags |= XFS_IFINLINE; | |
433 | } else { | |
434 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
435 | } | |
436 | xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK); | |
437 | hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data; | |
438 | hdr->count = 0; | |
3b244aa8 | 439 | hdr->totsize = cpu_to_be16(sizeof(*hdr)); |
1da177e4 | 440 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
1da177e4 LT |
441 | } |
442 | ||
443 | /* | |
444 | * Add a name/value pair to the shortform attribute list. | |
445 | * Overflow from the inode has already been checked for. | |
446 | */ | |
d8cc890d NS |
447 | void |
448 | xfs_attr_shortform_add(xfs_da_args_t *args, int forkoff) | |
1da177e4 LT |
449 | { |
450 | xfs_attr_shortform_t *sf; | |
451 | xfs_attr_sf_entry_t *sfe; | |
452 | int i, offset, size; | |
d8cc890d | 453 | xfs_mount_t *mp; |
1da177e4 LT |
454 | xfs_inode_t *dp; |
455 | xfs_ifork_t *ifp; | |
456 | ||
5a5881cd DC |
457 | trace_xfs_attr_sf_add(args); |
458 | ||
1da177e4 | 459 | dp = args->dp; |
d8cc890d NS |
460 | mp = dp->i_mount; |
461 | dp->i_d.di_forkoff = forkoff; | |
d8cc890d | 462 | |
1da177e4 LT |
463 | ifp = dp->i_afp; |
464 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
465 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
466 | sfe = &sf->list[0]; | |
3b244aa8 | 467 | for (i = 0; i < sf->hdr.count; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
d8cc890d | 468 | #ifdef DEBUG |
1da177e4 LT |
469 | if (sfe->namelen != args->namelen) |
470 | continue; | |
471 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
472 | continue; | |
726801ba | 473 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 | 474 | continue; |
d8cc890d NS |
475 | ASSERT(0); |
476 | #endif | |
1da177e4 LT |
477 | } |
478 | ||
479 | offset = (char *)sfe - (char *)sf; | |
480 | size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); | |
481 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); | |
482 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
483 | sfe = (xfs_attr_sf_entry_t *)((char *)sf + offset); | |
484 | ||
485 | sfe->namelen = args->namelen; | |
3b244aa8 | 486 | sfe->valuelen = args->valuelen; |
726801ba | 487 | sfe->flags = XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
1da177e4 LT |
488 | memcpy(sfe->nameval, args->name, args->namelen); |
489 | memcpy(&sfe->nameval[args->namelen], args->value, args->valuelen); | |
3b244aa8 | 490 | sf->hdr.count++; |
413d57c9 | 491 | be16_add_cpu(&sf->hdr.totsize, size); |
1da177e4 LT |
492 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
493 | ||
d8cc890d | 494 | xfs_sbversion_add_attr2(mp, args->trans); |
1da177e4 LT |
495 | } |
496 | ||
e1486dea CH |
497 | /* |
498 | * After the last attribute is removed revert to original inode format, | |
499 | * making all literal area available to the data fork once more. | |
500 | */ | |
501 | STATIC void | |
502 | xfs_attr_fork_reset( | |
503 | struct xfs_inode *ip, | |
504 | struct xfs_trans *tp) | |
505 | { | |
506 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
507 | ip->i_d.di_forkoff = 0; | |
508 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
509 | ||
510 | ASSERT(ip->i_d.di_anextents == 0); | |
511 | ASSERT(ip->i_afp == NULL); | |
512 | ||
e1486dea CH |
513 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
514 | } | |
515 | ||
1da177e4 | 516 | /* |
d8cc890d | 517 | * Remove an attribute from the shortform attribute list structure. |
1da177e4 LT |
518 | */ |
519 | int | |
520 | xfs_attr_shortform_remove(xfs_da_args_t *args) | |
521 | { | |
522 | xfs_attr_shortform_t *sf; | |
523 | xfs_attr_sf_entry_t *sfe; | |
524 | int base, size=0, end, totsize, i; | |
d8cc890d | 525 | xfs_mount_t *mp; |
1da177e4 LT |
526 | xfs_inode_t *dp; |
527 | ||
5a5881cd DC |
528 | trace_xfs_attr_sf_remove(args); |
529 | ||
1da177e4 | 530 | dp = args->dp; |
d8cc890d | 531 | mp = dp->i_mount; |
1da177e4 LT |
532 | base = sizeof(xfs_attr_sf_hdr_t); |
533 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; | |
534 | sfe = &sf->list[0]; | |
3b244aa8 | 535 | end = sf->hdr.count; |
d8cc890d | 536 | for (i = 0; i < end; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), |
1da177e4 LT |
537 | base += size, i++) { |
538 | size = XFS_ATTR_SF_ENTSIZE(sfe); | |
539 | if (sfe->namelen != args->namelen) | |
540 | continue; | |
541 | if (memcmp(sfe->nameval, args->name, args->namelen) != 0) | |
542 | continue; | |
726801ba | 543 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
544 | continue; |
545 | break; | |
546 | } | |
d8cc890d | 547 | if (i == end) |
1da177e4 LT |
548 | return(XFS_ERROR(ENOATTR)); |
549 | ||
d8cc890d NS |
550 | /* |
551 | * Fix up the attribute fork data, covering the hole | |
552 | */ | |
1da177e4 | 553 | end = base + size; |
3b244aa8 | 554 | totsize = be16_to_cpu(sf->hdr.totsize); |
d8cc890d NS |
555 | if (end != totsize) |
556 | memmove(&((char *)sf)[base], &((char *)sf)[end], totsize - end); | |
3b244aa8 | 557 | sf->hdr.count--; |
413d57c9 | 558 | be16_add_cpu(&sf->hdr.totsize, -size); |
d8cc890d NS |
559 | |
560 | /* | |
561 | * Fix up the start offset of the attribute fork | |
562 | */ | |
563 | totsize -= size; | |
6a178100 | 564 | if (totsize == sizeof(xfs_attr_sf_hdr_t) && |
e1486dea CH |
565 | (mp->m_flags & XFS_MOUNT_ATTR2) && |
566 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && | |
567 | !(args->op_flags & XFS_DA_OP_ADDNAME)) { | |
568 | xfs_attr_fork_reset(dp, args->trans); | |
d8cc890d NS |
569 | } else { |
570 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
571 | dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize); | |
572 | ASSERT(dp->i_d.di_forkoff); | |
6a178100 BN |
573 | ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) || |
574 | (args->op_flags & XFS_DA_OP_ADDNAME) || | |
575 | !(mp->m_flags & XFS_MOUNT_ATTR2) || | |
576 | dp->i_d.di_format == XFS_DINODE_FMT_BTREE); | |
d8cc890d NS |
577 | xfs_trans_log_inode(args->trans, dp, |
578 | XFS_ILOG_CORE | XFS_ILOG_ADATA); | |
579 | } | |
580 | ||
581 | xfs_sbversion_add_attr2(mp, args->trans); | |
1da177e4 LT |
582 | |
583 | return(0); | |
584 | } | |
585 | ||
586 | /* | |
587 | * Look up a name in a shortform attribute list structure. | |
588 | */ | |
589 | /*ARGSUSED*/ | |
590 | int | |
591 | xfs_attr_shortform_lookup(xfs_da_args_t *args) | |
592 | { | |
593 | xfs_attr_shortform_t *sf; | |
594 | xfs_attr_sf_entry_t *sfe; | |
595 | int i; | |
596 | xfs_ifork_t *ifp; | |
597 | ||
5a5881cd DC |
598 | trace_xfs_attr_sf_lookup(args); |
599 | ||
1da177e4 LT |
600 | ifp = args->dp->i_afp; |
601 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
602 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
603 | sfe = &sf->list[0]; | |
3b244aa8 | 604 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
605 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
606 | if (sfe->namelen != args->namelen) | |
607 | continue; | |
608 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
609 | continue; | |
726801ba | 610 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
611 | continue; |
612 | return(XFS_ERROR(EEXIST)); | |
613 | } | |
614 | return(XFS_ERROR(ENOATTR)); | |
615 | } | |
616 | ||
617 | /* | |
618 | * Look up a name in a shortform attribute list structure. | |
619 | */ | |
620 | /*ARGSUSED*/ | |
621 | int | |
622 | xfs_attr_shortform_getvalue(xfs_da_args_t *args) | |
623 | { | |
624 | xfs_attr_shortform_t *sf; | |
625 | xfs_attr_sf_entry_t *sfe; | |
626 | int i; | |
627 | ||
914ed44b | 628 | ASSERT(args->dp->i_afp->if_flags == XFS_IFINLINE); |
1da177e4 LT |
629 | sf = (xfs_attr_shortform_t *)args->dp->i_afp->if_u1.if_data; |
630 | sfe = &sf->list[0]; | |
3b244aa8 | 631 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
632 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
633 | if (sfe->namelen != args->namelen) | |
634 | continue; | |
635 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
636 | continue; | |
726801ba | 637 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
1da177e4 LT |
638 | continue; |
639 | if (args->flags & ATTR_KERNOVAL) { | |
3b244aa8 | 640 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
641 | return(XFS_ERROR(EEXIST)); |
642 | } | |
3b244aa8 NS |
643 | if (args->valuelen < sfe->valuelen) { |
644 | args->valuelen = sfe->valuelen; | |
1da177e4 LT |
645 | return(XFS_ERROR(ERANGE)); |
646 | } | |
3b244aa8 | 647 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
648 | memcpy(args->value, &sfe->nameval[args->namelen], |
649 | args->valuelen); | |
650 | return(XFS_ERROR(EEXIST)); | |
651 | } | |
652 | return(XFS_ERROR(ENOATTR)); | |
653 | } | |
654 | ||
655 | /* | |
656 | * Convert from using the shortform to the leaf. | |
657 | */ | |
658 | int | |
659 | xfs_attr_shortform_to_leaf(xfs_da_args_t *args) | |
660 | { | |
661 | xfs_inode_t *dp; | |
662 | xfs_attr_shortform_t *sf; | |
663 | xfs_attr_sf_entry_t *sfe; | |
664 | xfs_da_args_t nargs; | |
665 | char *tmpbuffer; | |
666 | int error, i, size; | |
667 | xfs_dablk_t blkno; | |
1d9025e5 | 668 | struct xfs_buf *bp; |
1da177e4 LT |
669 | xfs_ifork_t *ifp; |
670 | ||
5a5881cd DC |
671 | trace_xfs_attr_sf_to_leaf(args); |
672 | ||
1da177e4 LT |
673 | dp = args->dp; |
674 | ifp = dp->i_afp; | |
675 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
3b244aa8 | 676 | size = be16_to_cpu(sf->hdr.totsize); |
1da177e4 LT |
677 | tmpbuffer = kmem_alloc(size, KM_SLEEP); |
678 | ASSERT(tmpbuffer != NULL); | |
679 | memcpy(tmpbuffer, ifp->if_u1.if_data, size); | |
680 | sf = (xfs_attr_shortform_t *)tmpbuffer; | |
681 | ||
682 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
f3508bcd DC |
683 | xfs_bmap_local_to_extents_empty(dp, XFS_ATTR_FORK); |
684 | ||
1da177e4 LT |
685 | bp = NULL; |
686 | error = xfs_da_grow_inode(args, &blkno); | |
687 | if (error) { | |
688 | /* | |
689 | * If we hit an IO error middle of the transaction inside | |
690 | * grow_inode(), we may have inconsistent data. Bail out. | |
691 | */ | |
692 | if (error == EIO) | |
693 | goto out; | |
694 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
695 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
696 | goto out; | |
697 | } | |
698 | ||
699 | ASSERT(blkno == 0); | |
517c2220 | 700 | error = xfs_attr3_leaf_create(args, blkno, &bp); |
1da177e4 LT |
701 | if (error) { |
702 | error = xfs_da_shrink_inode(args, 0, bp); | |
703 | bp = NULL; | |
704 | if (error) | |
705 | goto out; | |
706 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
707 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
708 | goto out; | |
709 | } | |
710 | ||
711 | memset((char *)&nargs, 0, sizeof(nargs)); | |
712 | nargs.dp = dp; | |
713 | nargs.firstblock = args->firstblock; | |
714 | nargs.flist = args->flist; | |
715 | nargs.total = args->total; | |
716 | nargs.whichfork = XFS_ATTR_FORK; | |
717 | nargs.trans = args->trans; | |
6a178100 | 718 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
1da177e4 LT |
719 | |
720 | sfe = &sf->list[0]; | |
3b244aa8 | 721 | for (i = 0; i < sf->hdr.count; i++) { |
a9273ca5 | 722 | nargs.name = sfe->nameval; |
1da177e4 | 723 | nargs.namelen = sfe->namelen; |
a9273ca5 | 724 | nargs.value = &sfe->nameval[nargs.namelen]; |
3b244aa8 | 725 | nargs.valuelen = sfe->valuelen; |
a9273ca5 | 726 | nargs.hashval = xfs_da_hashname(sfe->nameval, |
1da177e4 | 727 | sfe->namelen); |
726801ba | 728 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags); |
517c2220 | 729 | error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */ |
1da177e4 | 730 | ASSERT(error == ENOATTR); |
517c2220 | 731 | error = xfs_attr3_leaf_add(bp, &nargs); |
1da177e4 LT |
732 | ASSERT(error != ENOSPC); |
733 | if (error) | |
734 | goto out; | |
735 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
736 | } | |
737 | error = 0; | |
738 | ||
739 | out: | |
f0e2d93c | 740 | kmem_free(tmpbuffer); |
1da177e4 LT |
741 | return(error); |
742 | } | |
743 | ||
1da177e4 LT |
744 | /* |
745 | * Check a leaf attribute block to see if all the entries would fit into | |
746 | * a shortform attribute list. | |
747 | */ | |
748 | int | |
1d9025e5 | 749 | xfs_attr_shortform_allfit( |
b38958d7 DC |
750 | struct xfs_buf *bp, |
751 | struct xfs_inode *dp) | |
1da177e4 | 752 | { |
b38958d7 DC |
753 | struct xfs_attr_leafblock *leaf; |
754 | struct xfs_attr_leaf_entry *entry; | |
1da177e4 | 755 | xfs_attr_leaf_name_local_t *name_loc; |
b38958d7 DC |
756 | struct xfs_attr3_icleaf_hdr leafhdr; |
757 | int bytes; | |
758 | int i; | |
1da177e4 | 759 | |
1d9025e5 | 760 | leaf = bp->b_addr; |
b38958d7 DC |
761 | xfs_attr3_leaf_hdr_from_disk(&leafhdr, leaf); |
762 | entry = xfs_attr3_leaf_entryp(leaf); | |
1da177e4 | 763 | |
1da177e4 | 764 | bytes = sizeof(struct xfs_attr_sf_hdr); |
b38958d7 | 765 | for (i = 0; i < leafhdr.count; entry++, i++) { |
1da177e4 LT |
766 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
767 | continue; /* don't copy partial entries */ | |
768 | if (!(entry->flags & XFS_ATTR_LOCAL)) | |
769 | return(0); | |
517c2220 | 770 | name_loc = xfs_attr3_leaf_name_local(leaf, i); |
1da177e4 LT |
771 | if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
772 | return(0); | |
053b5758 | 773 | if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX) |
1da177e4 | 774 | return(0); |
b38958d7 | 775 | bytes += sizeof(struct xfs_attr_sf_entry) - 1 |
1da177e4 | 776 | + name_loc->namelen |
053b5758 | 777 | + be16_to_cpu(name_loc->valuelen); |
1da177e4 | 778 | } |
13059ff0 | 779 | if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) && |
e5889e90 | 780 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
e0144ca5 | 781 | (bytes == sizeof(struct xfs_attr_sf_hdr))) |
b38958d7 DC |
782 | return -1; |
783 | return xfs_attr_shortform_bytesfit(dp, bytes); | |
1da177e4 LT |
784 | } |
785 | ||
786 | /* | |
787 | * Convert a leaf attribute list to shortform attribute list | |
788 | */ | |
789 | int | |
517c2220 DC |
790 | xfs_attr3_leaf_to_shortform( |
791 | struct xfs_buf *bp, | |
792 | struct xfs_da_args *args, | |
793 | int forkoff) | |
1da177e4 | 794 | { |
517c2220 DC |
795 | struct xfs_attr_leafblock *leaf; |
796 | struct xfs_attr3_icleaf_hdr ichdr; | |
797 | struct xfs_attr_leaf_entry *entry; | |
798 | struct xfs_attr_leaf_name_local *name_loc; | |
799 | struct xfs_da_args nargs; | |
800 | struct xfs_inode *dp = args->dp; | |
801 | char *tmpbuffer; | |
802 | int error; | |
803 | int i; | |
1da177e4 | 804 | |
5a5881cd DC |
805 | trace_xfs_attr_leaf_to_sf(args); |
806 | ||
1da177e4 | 807 | tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP); |
517c2220 DC |
808 | if (!tmpbuffer) |
809 | return ENOMEM; | |
1da177e4 | 810 | |
1d9025e5 | 811 | memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(dp->i_mount)); |
517c2220 | 812 | |
1da177e4 | 813 | leaf = (xfs_attr_leafblock_t *)tmpbuffer; |
517c2220 DC |
814 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
815 | entry = xfs_attr3_leaf_entryp(leaf); | |
816 | ||
817 | /* XXX (dgc): buffer is about to be marked stale - why zero it? */ | |
1d9025e5 | 818 | memset(bp->b_addr, 0, XFS_LBSIZE(dp->i_mount)); |
1da177e4 LT |
819 | |
820 | /* | |
821 | * Clean out the prior contents of the attribute list. | |
822 | */ | |
823 | error = xfs_da_shrink_inode(args, 0, bp); | |
824 | if (error) | |
825 | goto out; | |
d8cc890d NS |
826 | |
827 | if (forkoff == -1) { | |
13059ff0 | 828 | ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2); |
e5889e90 | 829 | ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE); |
e1486dea | 830 | xfs_attr_fork_reset(dp, args->trans); |
1da177e4 | 831 | goto out; |
d8cc890d NS |
832 | } |
833 | ||
834 | xfs_attr_shortform_create(args); | |
1da177e4 LT |
835 | |
836 | /* | |
837 | * Copy the attributes | |
838 | */ | |
839 | memset((char *)&nargs, 0, sizeof(nargs)); | |
840 | nargs.dp = dp; | |
841 | nargs.firstblock = args->firstblock; | |
842 | nargs.flist = args->flist; | |
843 | nargs.total = args->total; | |
844 | nargs.whichfork = XFS_ATTR_FORK; | |
845 | nargs.trans = args->trans; | |
6a178100 | 846 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
517c2220 DC |
847 | |
848 | for (i = 0; i < ichdr.count; entry++, i++) { | |
1da177e4 LT |
849 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
850 | continue; /* don't copy partial entries */ | |
851 | if (!entry->nameidx) | |
852 | continue; | |
853 | ASSERT(entry->flags & XFS_ATTR_LOCAL); | |
517c2220 | 854 | name_loc = xfs_attr3_leaf_name_local(leaf, i); |
a9273ca5 | 855 | nargs.name = name_loc->nameval; |
1da177e4 | 856 | nargs.namelen = name_loc->namelen; |
a9273ca5 | 857 | nargs.value = &name_loc->nameval[nargs.namelen]; |
053b5758 | 858 | nargs.valuelen = be16_to_cpu(name_loc->valuelen); |
6b19f2d8 | 859 | nargs.hashval = be32_to_cpu(entry->hashval); |
726801ba | 860 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(entry->flags); |
d8cc890d | 861 | xfs_attr_shortform_add(&nargs, forkoff); |
1da177e4 LT |
862 | } |
863 | error = 0; | |
864 | ||
865 | out: | |
f0e2d93c | 866 | kmem_free(tmpbuffer); |
517c2220 | 867 | return error; |
1da177e4 LT |
868 | } |
869 | ||
870 | /* | |
871 | * Convert from using a single leaf to a root node and a leaf. | |
872 | */ | |
873 | int | |
517c2220 DC |
874 | xfs_attr3_leaf_to_node( |
875 | struct xfs_da_args *args) | |
1da177e4 | 876 | { |
517c2220 DC |
877 | struct xfs_attr_leafblock *leaf; |
878 | struct xfs_attr3_icleaf_hdr icleafhdr; | |
879 | struct xfs_attr_leaf_entry *entries; | |
f5ea1100 | 880 | struct xfs_da_node_entry *btree; |
517c2220 DC |
881 | struct xfs_da3_icnode_hdr icnodehdr; |
882 | struct xfs_da_intnode *node; | |
883 | struct xfs_inode *dp = args->dp; | |
884 | struct xfs_mount *mp = dp->i_mount; | |
885 | struct xfs_buf *bp1 = NULL; | |
886 | struct xfs_buf *bp2 = NULL; | |
887 | xfs_dablk_t blkno; | |
888 | int error; | |
1da177e4 | 889 | |
5a5881cd DC |
890 | trace_xfs_attr_leaf_to_node(args); |
891 | ||
1da177e4 LT |
892 | error = xfs_da_grow_inode(args, &blkno); |
893 | if (error) | |
894 | goto out; | |
517c2220 | 895 | error = xfs_attr3_leaf_read(args->trans, dp, 0, -1, &bp1); |
1da177e4 LT |
896 | if (error) |
897 | goto out; | |
ad14c33a | 898 | |
517c2220 | 899 | error = xfs_da_get_buf(args->trans, dp, blkno, -1, &bp2, XFS_ATTR_FORK); |
1da177e4 LT |
900 | if (error) |
901 | goto out; | |
517c2220 DC |
902 | |
903 | /* copy leaf to new buffer, update identifiers */ | |
61fe135c | 904 | xfs_trans_buf_set_type(args->trans, bp2, XFS_BLFT_ATTR_LEAF_BUF); |
1813dd64 | 905 | bp2->b_ops = bp1->b_ops; |
517c2220 DC |
906 | memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(mp)); |
907 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
908 | struct xfs_da3_blkinfo *hdr3 = bp2->b_addr; | |
909 | hdr3->blkno = cpu_to_be64(bp2->b_bn); | |
910 | } | |
911 | xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(mp) - 1); | |
1da177e4 LT |
912 | |
913 | /* | |
914 | * Set up the new root node. | |
915 | */ | |
f5ea1100 | 916 | error = xfs_da3_node_create(args, 0, 1, &bp1, XFS_ATTR_FORK); |
1da177e4 LT |
917 | if (error) |
918 | goto out; | |
1d9025e5 | 919 | node = bp1->b_addr; |
01ba43b8 | 920 | dp->d_ops->node_hdr_from_disk(&icnodehdr, node); |
4bceb18f | 921 | btree = dp->d_ops->node_tree_p(node); |
517c2220 | 922 | |
1d9025e5 | 923 | leaf = bp2->b_addr; |
517c2220 DC |
924 | xfs_attr3_leaf_hdr_from_disk(&icleafhdr, leaf); |
925 | entries = xfs_attr3_leaf_entryp(leaf); | |
926 | ||
1da177e4 | 927 | /* both on-disk, don't endian-flip twice */ |
517c2220 | 928 | btree[0].hashval = entries[icleafhdr.count - 1].hashval; |
f5ea1100 | 929 | btree[0].before = cpu_to_be32(blkno); |
517c2220 | 930 | icnodehdr.count = 1; |
01ba43b8 | 931 | dp->d_ops->node_hdr_to_disk(node, &icnodehdr); |
517c2220 | 932 | xfs_trans_log_buf(args->trans, bp1, 0, XFS_LBSIZE(mp) - 1); |
1da177e4 LT |
933 | error = 0; |
934 | out: | |
517c2220 | 935 | return error; |
1da177e4 LT |
936 | } |
937 | ||
1da177e4 LT |
938 | /*======================================================================== |
939 | * Routines used for growing the Btree. | |
940 | *========================================================================*/ | |
941 | ||
942 | /* | |
943 | * Create the initial contents of a leaf attribute list | |
944 | * or a leaf in a node attribute list. | |
945 | */ | |
ba0f32d4 | 946 | STATIC int |
517c2220 DC |
947 | xfs_attr3_leaf_create( |
948 | struct xfs_da_args *args, | |
949 | xfs_dablk_t blkno, | |
950 | struct xfs_buf **bpp) | |
1da177e4 | 951 | { |
517c2220 DC |
952 | struct xfs_attr_leafblock *leaf; |
953 | struct xfs_attr3_icleaf_hdr ichdr; | |
954 | struct xfs_inode *dp = args->dp; | |
955 | struct xfs_mount *mp = dp->i_mount; | |
956 | struct xfs_buf *bp; | |
957 | int error; | |
1da177e4 | 958 | |
5a5881cd DC |
959 | trace_xfs_attr_leaf_create(args); |
960 | ||
1da177e4 LT |
961 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp, |
962 | XFS_ATTR_FORK); | |
963 | if (error) | |
517c2220 DC |
964 | return error; |
965 | bp->b_ops = &xfs_attr3_leaf_buf_ops; | |
61fe135c | 966 | xfs_trans_buf_set_type(args->trans, bp, XFS_BLFT_ATTR_LEAF_BUF); |
1d9025e5 | 967 | leaf = bp->b_addr; |
517c2220 DC |
968 | memset(leaf, 0, XFS_LBSIZE(mp)); |
969 | ||
970 | memset(&ichdr, 0, sizeof(ichdr)); | |
971 | ichdr.firstused = XFS_LBSIZE(mp); | |
972 | ||
973 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
974 | struct xfs_da3_blkinfo *hdr3 = bp->b_addr; | |
975 | ||
976 | ichdr.magic = XFS_ATTR3_LEAF_MAGIC; | |
977 | ||
978 | hdr3->blkno = cpu_to_be64(bp->b_bn); | |
979 | hdr3->owner = cpu_to_be64(dp->i_ino); | |
980 | uuid_copy(&hdr3->uuid, &mp->m_sb.sb_uuid); | |
1da177e4 | 981 | |
517c2220 DC |
982 | ichdr.freemap[0].base = sizeof(struct xfs_attr3_leaf_hdr); |
983 | } else { | |
984 | ichdr.magic = XFS_ATTR_LEAF_MAGIC; | |
985 | ichdr.freemap[0].base = sizeof(struct xfs_attr_leaf_hdr); | |
986 | } | |
987 | ichdr.freemap[0].size = ichdr.firstused - ichdr.freemap[0].base; | |
1da177e4 | 988 | |
517c2220 DC |
989 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
990 | xfs_trans_log_buf(args->trans, bp, 0, XFS_LBSIZE(mp) - 1); | |
1da177e4 LT |
991 | |
992 | *bpp = bp; | |
517c2220 | 993 | return 0; |
1da177e4 LT |
994 | } |
995 | ||
996 | /* | |
997 | * Split the leaf node, rebalance, then add the new entry. | |
998 | */ | |
999 | int | |
517c2220 DC |
1000 | xfs_attr3_leaf_split( |
1001 | struct xfs_da_state *state, | |
1002 | struct xfs_da_state_blk *oldblk, | |
1003 | struct xfs_da_state_blk *newblk) | |
1da177e4 LT |
1004 | { |
1005 | xfs_dablk_t blkno; | |
1006 | int error; | |
1007 | ||
5a5881cd DC |
1008 | trace_xfs_attr_leaf_split(state->args); |
1009 | ||
1da177e4 LT |
1010 | /* |
1011 | * Allocate space for a new leaf node. | |
1012 | */ | |
1013 | ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC); | |
1014 | error = xfs_da_grow_inode(state->args, &blkno); | |
1015 | if (error) | |
1016 | return(error); | |
517c2220 | 1017 | error = xfs_attr3_leaf_create(state->args, blkno, &newblk->bp); |
1da177e4 LT |
1018 | if (error) |
1019 | return(error); | |
1020 | newblk->blkno = blkno; | |
1021 | newblk->magic = XFS_ATTR_LEAF_MAGIC; | |
1022 | ||
1023 | /* | |
1024 | * Rebalance the entries across the two leaves. | |
1025 | * NOTE: rebalance() currently depends on the 2nd block being empty. | |
1026 | */ | |
517c2220 | 1027 | xfs_attr3_leaf_rebalance(state, oldblk, newblk); |
f5ea1100 | 1028 | error = xfs_da3_blk_link(state, oldblk, newblk); |
1da177e4 LT |
1029 | if (error) |
1030 | return(error); | |
1031 | ||
1032 | /* | |
1033 | * Save info on "old" attribute for "atomic rename" ops, leaf_add() | |
1034 | * modifies the index/blkno/rmtblk/rmtblkcnt fields to show the | |
1035 | * "new" attrs info. Will need the "old" info to remove it later. | |
1036 | * | |
1037 | * Insert the "new" entry in the correct block. | |
1038 | */ | |
5a5881cd DC |
1039 | if (state->inleaf) { |
1040 | trace_xfs_attr_leaf_add_old(state->args); | |
517c2220 | 1041 | error = xfs_attr3_leaf_add(oldblk->bp, state->args); |
5a5881cd DC |
1042 | } else { |
1043 | trace_xfs_attr_leaf_add_new(state->args); | |
517c2220 | 1044 | error = xfs_attr3_leaf_add(newblk->bp, state->args); |
5a5881cd | 1045 | } |
1da177e4 LT |
1046 | |
1047 | /* | |
1048 | * Update last hashval in each block since we added the name. | |
1049 | */ | |
1050 | oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL); | |
1051 | newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL); | |
1052 | return(error); | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Add a name to the leaf attribute list structure. | |
1057 | */ | |
1058 | int | |
517c2220 | 1059 | xfs_attr3_leaf_add( |
1d9025e5 DC |
1060 | struct xfs_buf *bp, |
1061 | struct xfs_da_args *args) | |
1da177e4 | 1062 | { |
517c2220 DC |
1063 | struct xfs_attr_leafblock *leaf; |
1064 | struct xfs_attr3_icleaf_hdr ichdr; | |
1065 | int tablesize; | |
1066 | int entsize; | |
1067 | int sum; | |
1068 | int tmp; | |
1069 | int i; | |
1da177e4 | 1070 | |
5a5881cd DC |
1071 | trace_xfs_attr_leaf_add(args); |
1072 | ||
1d9025e5 | 1073 | leaf = bp->b_addr; |
517c2220 DC |
1074 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
1075 | ASSERT(args->index >= 0 && args->index <= ichdr.count); | |
aa82daa0 | 1076 | entsize = xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1da177e4 LT |
1077 | args->trans->t_mountp->m_sb.sb_blocksize, NULL); |
1078 | ||
1079 | /* | |
1080 | * Search through freemap for first-fit on new name length. | |
1081 | * (may need to figure in size of entry struct too) | |
1082 | */ | |
517c2220 DC |
1083 | tablesize = (ichdr.count + 1) * sizeof(xfs_attr_leaf_entry_t) |
1084 | + xfs_attr3_leaf_hdr_size(leaf); | |
1085 | for (sum = 0, i = XFS_ATTR_LEAF_MAPSIZE - 1; i >= 0; i--) { | |
1086 | if (tablesize > ichdr.firstused) { | |
1087 | sum += ichdr.freemap[i].size; | |
1da177e4 LT |
1088 | continue; |
1089 | } | |
517c2220 | 1090 | if (!ichdr.freemap[i].size) |
1da177e4 LT |
1091 | continue; /* no space in this map */ |
1092 | tmp = entsize; | |
517c2220 | 1093 | if (ichdr.freemap[i].base < ichdr.firstused) |
1da177e4 | 1094 | tmp += sizeof(xfs_attr_leaf_entry_t); |
517c2220 DC |
1095 | if (ichdr.freemap[i].size >= tmp) { |
1096 | tmp = xfs_attr3_leaf_add_work(bp, &ichdr, args, i); | |
1097 | goto out_log_hdr; | |
1da177e4 | 1098 | } |
517c2220 | 1099 | sum += ichdr.freemap[i].size; |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | /* | |
1103 | * If there are no holes in the address space of the block, | |
1104 | * and we don't have enough freespace, then compaction will do us | |
1105 | * no good and we should just give up. | |
1106 | */ | |
517c2220 DC |
1107 | if (!ichdr.holes && sum < entsize) |
1108 | return XFS_ERROR(ENOSPC); | |
1da177e4 LT |
1109 | |
1110 | /* | |
1111 | * Compact the entries to coalesce free space. | |
1112 | * This may change the hdr->count via dropping INCOMPLETE entries. | |
1113 | */ | |
517c2220 | 1114 | xfs_attr3_leaf_compact(args, &ichdr, bp); |
1da177e4 LT |
1115 | |
1116 | /* | |
1117 | * After compaction, the block is guaranteed to have only one | |
1118 | * free region, in freemap[0]. If it is not big enough, give up. | |
1119 | */ | |
517c2220 DC |
1120 | if (ichdr.freemap[0].size < (entsize + sizeof(xfs_attr_leaf_entry_t))) { |
1121 | tmp = ENOSPC; | |
1122 | goto out_log_hdr; | |
1123 | } | |
1124 | ||
1125 | tmp = xfs_attr3_leaf_add_work(bp, &ichdr, args, 0); | |
1da177e4 | 1126 | |
517c2220 DC |
1127 | out_log_hdr: |
1128 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); | |
1129 | xfs_trans_log_buf(args->trans, bp, | |
1130 | XFS_DA_LOGRANGE(leaf, &leaf->hdr, | |
1131 | xfs_attr3_leaf_hdr_size(leaf))); | |
1132 | return tmp; | |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | /* | |
1136 | * Add a name to a leaf attribute list structure. | |
1137 | */ | |
1138 | STATIC int | |
517c2220 DC |
1139 | xfs_attr3_leaf_add_work( |
1140 | struct xfs_buf *bp, | |
1141 | struct xfs_attr3_icleaf_hdr *ichdr, | |
1142 | struct xfs_da_args *args, | |
1143 | int mapindex) | |
1da177e4 | 1144 | { |
517c2220 DC |
1145 | struct xfs_attr_leafblock *leaf; |
1146 | struct xfs_attr_leaf_entry *entry; | |
1147 | struct xfs_attr_leaf_name_local *name_loc; | |
1148 | struct xfs_attr_leaf_name_remote *name_rmt; | |
1149 | struct xfs_mount *mp; | |
1150 | int tmp; | |
1151 | int i; | |
1da177e4 | 1152 | |
ee73259b DC |
1153 | trace_xfs_attr_leaf_add_work(args); |
1154 | ||
1d9025e5 | 1155 | leaf = bp->b_addr; |
517c2220 DC |
1156 | ASSERT(mapindex >= 0 && mapindex < XFS_ATTR_LEAF_MAPSIZE); |
1157 | ASSERT(args->index >= 0 && args->index <= ichdr->count); | |
1da177e4 LT |
1158 | |
1159 | /* | |
1160 | * Force open some space in the entry array and fill it in. | |
1161 | */ | |
517c2220 DC |
1162 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
1163 | if (args->index < ichdr->count) { | |
1164 | tmp = ichdr->count - args->index; | |
1da177e4 | 1165 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
517c2220 | 1166 | memmove(entry + 1, entry, tmp); |
1d9025e5 | 1167 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
1168 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); |
1169 | } | |
517c2220 | 1170 | ichdr->count++; |
1da177e4 LT |
1171 | |
1172 | /* | |
1173 | * Allocate space for the new string (at the end of the run). | |
1174 | */ | |
1da177e4 | 1175 | mp = args->trans->t_mountp; |
517c2220 DC |
1176 | ASSERT(ichdr->freemap[mapindex].base < XFS_LBSIZE(mp)); |
1177 | ASSERT((ichdr->freemap[mapindex].base & 0x3) == 0); | |
1178 | ASSERT(ichdr->freemap[mapindex].size >= | |
aa82daa0 NS |
1179 | xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1180 | mp->m_sb.sb_blocksize, NULL)); | |
517c2220 DC |
1181 | ASSERT(ichdr->freemap[mapindex].size < XFS_LBSIZE(mp)); |
1182 | ASSERT((ichdr->freemap[mapindex].size & 0x3) == 0); | |
1183 | ||
1184 | ichdr->freemap[mapindex].size -= | |
1185 | xfs_attr_leaf_newentsize(args->namelen, args->valuelen, | |
1186 | mp->m_sb.sb_blocksize, &tmp); | |
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); |
1da177e4 | 1231 | } |
1d9025e5 | 1232 | xfs_trans_log_buf(args->trans, bp, |
517c2220 | 1233 | XFS_DA_LOGRANGE(leaf, xfs_attr3_leaf_name(leaf, args->index), |
1da177e4 LT |
1234 | xfs_attr_leaf_entsize(leaf, args->index))); |
1235 | ||
1236 | /* | |
1237 | * Update the control info for this leaf node | |
1238 | */ | |
517c2220 DC |
1239 | if (be16_to_cpu(entry->nameidx) < ichdr->firstused) |
1240 | ichdr->firstused = be16_to_cpu(entry->nameidx); | |
1241 | ||
1242 | ASSERT(ichdr->firstused >= ichdr->count * sizeof(xfs_attr_leaf_entry_t) | |
1243 | + xfs_attr3_leaf_hdr_size(leaf)); | |
1244 | tmp = (ichdr->count - 1) * sizeof(xfs_attr_leaf_entry_t) | |
1245 | + xfs_attr3_leaf_hdr_size(leaf); | |
1246 | ||
1247 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { | |
1248 | if (ichdr->freemap[i].base == tmp) { | |
1249 | ichdr->freemap[i].base += sizeof(xfs_attr_leaf_entry_t); | |
1250 | ichdr->freemap[i].size -= sizeof(xfs_attr_leaf_entry_t); | |
1da177e4 LT |
1251 | } |
1252 | } | |
517c2220 DC |
1253 | ichdr->usedbytes += xfs_attr_leaf_entsize(leaf, args->index); |
1254 | return 0; | |
1da177e4 LT |
1255 | } |
1256 | ||
1257 | /* | |
1258 | * Garbage collect a leaf attribute list block by copying it to a new buffer. | |
1259 | */ | |
1260 | STATIC void | |
517c2220 | 1261 | xfs_attr3_leaf_compact( |
ee73259b | 1262 | struct xfs_da_args *args, |
d4c712bc | 1263 | struct xfs_attr3_icleaf_hdr *ichdr_dst, |
ee73259b | 1264 | struct xfs_buf *bp) |
1da177e4 | 1265 | { |
d4c712bc DC |
1266 | struct xfs_attr_leafblock *leaf_src; |
1267 | struct xfs_attr_leafblock *leaf_dst; | |
1268 | struct xfs_attr3_icleaf_hdr ichdr_src; | |
ee73259b DC |
1269 | struct xfs_trans *trans = args->trans; |
1270 | struct xfs_mount *mp = trans->t_mountp; | |
1271 | char *tmpbuffer; | |
1272 | ||
1273 | trace_xfs_attr_leaf_compact(args); | |
1da177e4 | 1274 | |
1da177e4 | 1275 | tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP); |
1d9025e5 DC |
1276 | memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(mp)); |
1277 | memset(bp->b_addr, 0, XFS_LBSIZE(mp)); | |
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 */ | |
1290 | ichdr_dst->firstused = XFS_LBSIZE(mp); | |
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 | */ | |
d4c712bc DC |
1305 | xfs_attr3_leaf_moveents(leaf_src, &ichdr_src, 0, leaf_dst, ichdr_dst, 0, |
1306 | ichdr_src.count, mp); | |
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 | */ | |
1d9025e5 | 1311 | xfs_trans_log_buf(trans, bp, 0, XFS_LBSIZE(mp) - 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 | */ | |
517c2220 DC |
1462 | xfs_attr3_leaf_moveents(leaf1, &ichdr1, ichdr1.count - count, |
1463 | leaf2, &ichdr2, 0, count, state->mp); | |
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 | */ | |
517c2220 DC |
1491 | xfs_attr3_leaf_moveents(leaf2, &ichdr2, 0, leaf1, &ichdr1, |
1492 | ichdr1.count, count, state->mp); | |
1da177e4 LT |
1493 | } |
1494 | ||
517c2220 DC |
1495 | xfs_attr3_leaf_hdr_to_disk(leaf1, &ichdr1); |
1496 | xfs_attr3_leaf_hdr_to_disk(leaf2, &ichdr2); | |
1497 | xfs_trans_log_buf(args->trans, blk1->bp, 0, state->blocksize-1); | |
1498 | xfs_trans_log_buf(args->trans, blk2->bp, 0, state->blocksize-1); | |
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 + | |
1593 | xfs_attr_leaf_newentsize(state->args->namelen, | |
1594 | state->args->valuelen, | |
1595 | state->blocksize, NULL); | |
1da177e4 LT |
1596 | half /= 2; |
1597 | lastdelta = state->blocksize; | |
517c2220 | 1598 | entry = xfs_attr3_leaf_entryp(leaf1); |
1da177e4 LT |
1599 | for (count = index = 0; count < max; entry++, index++, count++) { |
1600 | ||
1601 | #define XFS_ATTR_ABS(A) (((A) < 0) ? -(A) : (A)) | |
1602 | /* | |
1603 | * The new entry is in the first block, account for it. | |
1604 | */ | |
1605 | if (count == blk1->index) { | |
1606 | tmp = totallen + sizeof(*entry) + | |
aa82daa0 NS |
1607 | xfs_attr_leaf_newentsize( |
1608 | state->args->namelen, | |
1609 | state->args->valuelen, | |
1610 | state->blocksize, NULL); | |
1da177e4 LT |
1611 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) |
1612 | break; | |
1613 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1614 | totallen = tmp; | |
1615 | foundit = 1; | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * Wrap around into the second block if necessary. | |
1620 | */ | |
517c2220 | 1621 | if (count == ichdr1->count) { |
1da177e4 | 1622 | leaf1 = leaf2; |
517c2220 | 1623 | entry = xfs_attr3_leaf_entryp(leaf1); |
1da177e4 LT |
1624 | index = 0; |
1625 | } | |
1626 | ||
1627 | /* | |
1628 | * Figure out if next leaf entry would be too much. | |
1629 | */ | |
1630 | tmp = totallen + sizeof(*entry) + xfs_attr_leaf_entsize(leaf1, | |
1631 | index); | |
1632 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) | |
1633 | break; | |
1634 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1635 | totallen = tmp; | |
1636 | #undef XFS_ATTR_ABS | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * Calculate the number of usedbytes that will end up in lower block. | |
1641 | * If new entry not in lower block, fix up the count. | |
1642 | */ | |
1643 | totallen -= count * sizeof(*entry); | |
1644 | if (foundit) { | |
1645 | totallen -= sizeof(*entry) + | |
aa82daa0 NS |
1646 | xfs_attr_leaf_newentsize( |
1647 | state->args->namelen, | |
1648 | state->args->valuelen, | |
1649 | state->blocksize, NULL); | |
1da177e4 LT |
1650 | } |
1651 | ||
1652 | *countarg = count; | |
1653 | *usedbytesarg = totallen; | |
517c2220 | 1654 | return foundit; |
1da177e4 LT |
1655 | } |
1656 | ||
1657 | /*======================================================================== | |
1658 | * Routines used for shrinking the Btree. | |
1659 | *========================================================================*/ | |
1660 | ||
1661 | /* | |
1662 | * Check a leaf block and its neighbors to see if the block should be | |
1663 | * collapsed into one or the other neighbor. Always keep the block | |
1664 | * with the smaller block number. | |
1665 | * If the current block is over 50% full, don't try to join it, return 0. | |
1666 | * If the block is empty, fill in the state structure and return 2. | |
1667 | * If it can be collapsed, fill in the state structure and return 1. | |
1668 | * If nothing can be done, return 0. | |
1669 | * | |
1670 | * GROT: allow for INCOMPLETE entries in calculation. | |
1671 | */ | |
1672 | int | |
517c2220 DC |
1673 | xfs_attr3_leaf_toosmall( |
1674 | struct xfs_da_state *state, | |
1675 | int *action) | |
1da177e4 | 1676 | { |
517c2220 DC |
1677 | struct xfs_attr_leafblock *leaf; |
1678 | struct xfs_da_state_blk *blk; | |
1679 | struct xfs_attr3_icleaf_hdr ichdr; | |
1680 | struct xfs_buf *bp; | |
1681 | xfs_dablk_t blkno; | |
1682 | int bytes; | |
1683 | int forward; | |
1684 | int error; | |
1685 | int retval; | |
1686 | int i; | |
1da177e4 | 1687 | |
ee73259b DC |
1688 | trace_xfs_attr_leaf_toosmall(state->args); |
1689 | ||
1da177e4 LT |
1690 | /* |
1691 | * Check for the degenerate case of the block being over 50% full. | |
1692 | * If so, it's not worth even looking to see if we might be able | |
1693 | * to coalesce with a sibling. | |
1694 | */ | |
1695 | blk = &state->path.blk[ state->path.active-1 ]; | |
517c2220 DC |
1696 | leaf = blk->bp->b_addr; |
1697 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); | |
1698 | bytes = xfs_attr3_leaf_hdr_size(leaf) + | |
1699 | ichdr.count * sizeof(xfs_attr_leaf_entry_t) + | |
1700 | ichdr.usedbytes; | |
1da177e4 LT |
1701 | if (bytes > (state->blocksize >> 1)) { |
1702 | *action = 0; /* blk over 50%, don't try to join */ | |
1703 | return(0); | |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * Check for the degenerate case of the block being empty. | |
1708 | * If the block is empty, we'll simply delete it, no need to | |
c41564b5 | 1709 | * coalesce it with a sibling block. We choose (arbitrarily) |
1da177e4 LT |
1710 | * to merge with the forward block unless it is NULL. |
1711 | */ | |
517c2220 | 1712 | if (ichdr.count == 0) { |
1da177e4 LT |
1713 | /* |
1714 | * Make altpath point to the block we want to keep and | |
1715 | * path point to the block we want to drop (this one). | |
1716 | */ | |
517c2220 | 1717 | forward = (ichdr.forw != 0); |
1da177e4 | 1718 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
f5ea1100 | 1719 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
1da177e4 LT |
1720 | 0, &retval); |
1721 | if (error) | |
1722 | return(error); | |
1723 | if (retval) { | |
1724 | *action = 0; | |
1725 | } else { | |
1726 | *action = 2; | |
1727 | } | |
517c2220 | 1728 | return 0; |
1da177e4 LT |
1729 | } |
1730 | ||
1731 | /* | |
1732 | * Examine each sibling block to see if we can coalesce with | |
1733 | * at least 25% free space to spare. We need to figure out | |
1734 | * whether to merge with the forward or the backward block. | |
1735 | * We prefer coalescing with the lower numbered sibling so as | |
1736 | * to shrink an attribute list over time. | |
1737 | */ | |
1738 | /* start with smaller blk num */ | |
517c2220 | 1739 | forward = ichdr.forw < ichdr.back; |
1da177e4 | 1740 | for (i = 0; i < 2; forward = !forward, i++) { |
517c2220 | 1741 | struct xfs_attr3_icleaf_hdr ichdr2; |
1da177e4 | 1742 | if (forward) |
517c2220 | 1743 | blkno = ichdr.forw; |
1da177e4 | 1744 | else |
517c2220 | 1745 | blkno = ichdr.back; |
1da177e4 LT |
1746 | if (blkno == 0) |
1747 | continue; | |
517c2220 | 1748 | error = xfs_attr3_leaf_read(state->args->trans, state->args->dp, |
ad14c33a | 1749 | blkno, -1, &bp); |
1da177e4 LT |
1750 | if (error) |
1751 | return(error); | |
1da177e4 | 1752 | |
517c2220 DC |
1753 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, bp->b_addr); |
1754 | ||
1755 | bytes = state->blocksize - (state->blocksize >> 2) - | |
1756 | ichdr.usedbytes - ichdr2.usedbytes - | |
1757 | ((ichdr.count + ichdr2.count) * | |
1758 | sizeof(xfs_attr_leaf_entry_t)) - | |
1759 | xfs_attr3_leaf_hdr_size(leaf); | |
1760 | ||
1d9025e5 | 1761 | xfs_trans_brelse(state->args->trans, bp); |
1da177e4 LT |
1762 | if (bytes >= 0) |
1763 | break; /* fits with at least 25% to spare */ | |
1764 | } | |
1765 | if (i >= 2) { | |
1766 | *action = 0; | |
1767 | return(0); | |
1768 | } | |
1769 | ||
1770 | /* | |
1771 | * Make altpath point to the block we want to keep (the lower | |
1772 | * numbered block) and path point to the block we want to drop. | |
1773 | */ | |
1774 | memcpy(&state->altpath, &state->path, sizeof(state->path)); | |
1775 | if (blkno < blk->blkno) { | |
f5ea1100 | 1776 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
1da177e4 LT |
1777 | 0, &retval); |
1778 | } else { | |
f5ea1100 | 1779 | error = xfs_da3_path_shift(state, &state->path, forward, |
1da177e4 LT |
1780 | 0, &retval); |
1781 | } | |
1782 | if (error) | |
1783 | return(error); | |
1784 | if (retval) { | |
1785 | *action = 0; | |
1786 | } else { | |
1787 | *action = 1; | |
1788 | } | |
1789 | return(0); | |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * Remove a name from the leaf attribute list structure. | |
1794 | * | |
1795 | * Return 1 if leaf is less than 37% full, 0 if >= 37% full. | |
1796 | * If two leaves are 37% full, when combined they will leave 25% free. | |
1797 | */ | |
1798 | int | |
517c2220 DC |
1799 | xfs_attr3_leaf_remove( |
1800 | struct xfs_buf *bp, | |
1801 | struct xfs_da_args *args) | |
1da177e4 | 1802 | { |
517c2220 DC |
1803 | struct xfs_attr_leafblock *leaf; |
1804 | struct xfs_attr3_icleaf_hdr ichdr; | |
1805 | struct xfs_attr_leaf_entry *entry; | |
1806 | struct xfs_mount *mp = args->trans->t_mountp; | |
1807 | int before; | |
1808 | int after; | |
1809 | int smallest; | |
1810 | int entsize; | |
1811 | int tablesize; | |
1812 | int tmp; | |
1813 | int i; | |
1da177e4 | 1814 | |
ee73259b DC |
1815 | trace_xfs_attr_leaf_remove(args); |
1816 | ||
1d9025e5 | 1817 | leaf = bp->b_addr; |
517c2220 DC |
1818 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
1819 | ||
1820 | ASSERT(ichdr.count > 0 && ichdr.count < XFS_LBSIZE(mp) / 8); | |
1821 | ASSERT(args->index >= 0 && args->index < ichdr.count); | |
1822 | ASSERT(ichdr.firstused >= ichdr.count * sizeof(*entry) + | |
1823 | xfs_attr3_leaf_hdr_size(leaf)); | |
1824 | ||
1825 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; | |
1826 | ||
1827 | ASSERT(be16_to_cpu(entry->nameidx) >= ichdr.firstused); | |
6b19f2d8 | 1828 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); |
1da177e4 LT |
1829 | |
1830 | /* | |
1831 | * Scan through free region table: | |
1832 | * check for adjacency of free'd entry with an existing one, | |
1833 | * find smallest free region in case we need to replace it, | |
1834 | * adjust any map that borders the entry table, | |
1835 | */ | |
517c2220 DC |
1836 | tablesize = ichdr.count * sizeof(xfs_attr_leaf_entry_t) |
1837 | + xfs_attr3_leaf_hdr_size(leaf); | |
1838 | tmp = ichdr.freemap[0].size; | |
1da177e4 LT |
1839 | before = after = -1; |
1840 | smallest = XFS_ATTR_LEAF_MAPSIZE - 1; | |
1841 | entsize = xfs_attr_leaf_entsize(leaf, args->index); | |
517c2220 DC |
1842 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
1843 | ASSERT(ichdr.freemap[i].base < XFS_LBSIZE(mp)); | |
1844 | ASSERT(ichdr.freemap[i].size < XFS_LBSIZE(mp)); | |
1845 | if (ichdr.freemap[i].base == tablesize) { | |
1846 | ichdr.freemap[i].base -= sizeof(xfs_attr_leaf_entry_t); | |
1847 | ichdr.freemap[i].size += sizeof(xfs_attr_leaf_entry_t); | |
1da177e4 LT |
1848 | } |
1849 | ||
517c2220 DC |
1850 | if (ichdr.freemap[i].base + ichdr.freemap[i].size == |
1851 | be16_to_cpu(entry->nameidx)) { | |
1da177e4 | 1852 | before = i; |
517c2220 DC |
1853 | } else if (ichdr.freemap[i].base == |
1854 | (be16_to_cpu(entry->nameidx) + entsize)) { | |
1da177e4 | 1855 | after = i; |
517c2220 DC |
1856 | } else if (ichdr.freemap[i].size < tmp) { |
1857 | tmp = ichdr.freemap[i].size; | |
1da177e4 LT |
1858 | smallest = i; |
1859 | } | |
1860 | } | |
1861 | ||
1862 | /* | |
1863 | * Coalesce adjacent freemap regions, | |
1864 | * or replace the smallest region. | |
1865 | */ | |
1866 | if ((before >= 0) || (after >= 0)) { | |
1867 | if ((before >= 0) && (after >= 0)) { | |
517c2220 DC |
1868 | ichdr.freemap[before].size += entsize; |
1869 | ichdr.freemap[before].size += ichdr.freemap[after].size; | |
1870 | ichdr.freemap[after].base = 0; | |
1871 | ichdr.freemap[after].size = 0; | |
1da177e4 | 1872 | } else if (before >= 0) { |
517c2220 | 1873 | ichdr.freemap[before].size += entsize; |
1da177e4 | 1874 | } else { |
517c2220 DC |
1875 | ichdr.freemap[after].base = be16_to_cpu(entry->nameidx); |
1876 | ichdr.freemap[after].size += entsize; | |
1da177e4 LT |
1877 | } |
1878 | } else { | |
1879 | /* | |
1880 | * Replace smallest region (if it is smaller than free'd entry) | |
1881 | */ | |
517c2220 DC |
1882 | if (ichdr.freemap[smallest].size < entsize) { |
1883 | ichdr.freemap[smallest].base = be16_to_cpu(entry->nameidx); | |
1884 | ichdr.freemap[smallest].size = entsize; | |
1da177e4 LT |
1885 | } |
1886 | } | |
1887 | ||
1888 | /* | |
1889 | * Did we remove the first entry? | |
1890 | */ | |
517c2220 | 1891 | if (be16_to_cpu(entry->nameidx) == ichdr.firstused) |
1da177e4 LT |
1892 | smallest = 1; |
1893 | else | |
1894 | smallest = 0; | |
1895 | ||
1896 | /* | |
1897 | * Compress the remaining entries and zero out the removed stuff. | |
1898 | */ | |
517c2220 DC |
1899 | memset(xfs_attr3_leaf_name(leaf, args->index), 0, entsize); |
1900 | ichdr.usedbytes -= entsize; | |
1d9025e5 | 1901 | xfs_trans_log_buf(args->trans, bp, |
517c2220 | 1902 | XFS_DA_LOGRANGE(leaf, xfs_attr3_leaf_name(leaf, args->index), |
1da177e4 LT |
1903 | entsize)); |
1904 | ||
517c2220 DC |
1905 | tmp = (ichdr.count - args->index) * sizeof(xfs_attr_leaf_entry_t); |
1906 | memmove(entry, entry + 1, tmp); | |
1907 | ichdr.count--; | |
1d9025e5 | 1908 | xfs_trans_log_buf(args->trans, bp, |
517c2220 DC |
1909 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(xfs_attr_leaf_entry_t))); |
1910 | ||
1911 | entry = &xfs_attr3_leaf_entryp(leaf)[ichdr.count]; | |
1912 | memset(entry, 0, sizeof(xfs_attr_leaf_entry_t)); | |
1da177e4 LT |
1913 | |
1914 | /* | |
1915 | * If we removed the first entry, re-find the first used byte | |
1916 | * in the name area. Note that if the entry was the "firstused", | |
1917 | * then we don't have a "hole" in our block resulting from | |
1918 | * removing the name. | |
1919 | */ | |
1920 | if (smallest) { | |
1921 | tmp = XFS_LBSIZE(mp); | |
517c2220 DC |
1922 | entry = xfs_attr3_leaf_entryp(leaf); |
1923 | for (i = ichdr.count - 1; i >= 0; entry++, i--) { | |
1924 | ASSERT(be16_to_cpu(entry->nameidx) >= ichdr.firstused); | |
6b19f2d8 NS |
1925 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); |
1926 | ||
1927 | if (be16_to_cpu(entry->nameidx) < tmp) | |
1928 | tmp = be16_to_cpu(entry->nameidx); | |
1da177e4 | 1929 | } |
517c2220 DC |
1930 | ichdr.firstused = tmp; |
1931 | if (!ichdr.firstused) | |
1932 | ichdr.firstused = tmp - XFS_ATTR_LEAF_NAME_ALIGN; | |
1da177e4 | 1933 | } else { |
517c2220 | 1934 | ichdr.holes = 1; /* mark as needing compaction */ |
1da177e4 | 1935 | } |
517c2220 | 1936 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
1d9025e5 | 1937 | xfs_trans_log_buf(args->trans, bp, |
517c2220 DC |
1938 | XFS_DA_LOGRANGE(leaf, &leaf->hdr, |
1939 | xfs_attr3_leaf_hdr_size(leaf))); | |
1da177e4 LT |
1940 | |
1941 | /* | |
1942 | * Check if leaf is less than 50% full, caller may want to | |
1943 | * "join" the leaf with a sibling if so. | |
1944 | */ | |
517c2220 DC |
1945 | tmp = ichdr.usedbytes + xfs_attr3_leaf_hdr_size(leaf) + |
1946 | ichdr.count * sizeof(xfs_attr_leaf_entry_t); | |
1947 | ||
1948 | return tmp < mp->m_attr_magicpct; /* leaf is < 37% full */ | |
1da177e4 LT |
1949 | } |
1950 | ||
1951 | /* | |
1952 | * Move all the attribute list entries from drop_leaf into save_leaf. | |
1953 | */ | |
1954 | void | |
517c2220 DC |
1955 | xfs_attr3_leaf_unbalance( |
1956 | struct xfs_da_state *state, | |
1957 | struct xfs_da_state_blk *drop_blk, | |
1958 | struct xfs_da_state_blk *save_blk) | |
1da177e4 | 1959 | { |
517c2220 DC |
1960 | struct xfs_attr_leafblock *drop_leaf = drop_blk->bp->b_addr; |
1961 | struct xfs_attr_leafblock *save_leaf = save_blk->bp->b_addr; | |
1962 | struct xfs_attr3_icleaf_hdr drophdr; | |
1963 | struct xfs_attr3_icleaf_hdr savehdr; | |
1964 | struct xfs_attr_leaf_entry *entry; | |
1965 | struct xfs_mount *mp = state->mp; | |
1da177e4 | 1966 | |
5a5881cd DC |
1967 | trace_xfs_attr_leaf_unbalance(state->args); |
1968 | ||
1d9025e5 DC |
1969 | drop_leaf = drop_blk->bp->b_addr; |
1970 | save_leaf = save_blk->bp->b_addr; | |
517c2220 DC |
1971 | xfs_attr3_leaf_hdr_from_disk(&drophdr, drop_leaf); |
1972 | xfs_attr3_leaf_hdr_from_disk(&savehdr, save_leaf); | |
1973 | entry = xfs_attr3_leaf_entryp(drop_leaf); | |
1da177e4 LT |
1974 | |
1975 | /* | |
1976 | * Save last hashval from dying block for later Btree fixup. | |
1977 | */ | |
517c2220 | 1978 | drop_blk->hashval = be32_to_cpu(entry[drophdr.count - 1].hashval); |
1da177e4 LT |
1979 | |
1980 | /* | |
1981 | * Check if we need a temp buffer, or can we do it in place. | |
1982 | * Note that we don't check "leaf" for holes because we will | |
1983 | * always be dropping it, toosmall() decided that for us already. | |
1984 | */ | |
517c2220 | 1985 | if (savehdr.holes == 0) { |
1da177e4 LT |
1986 | /* |
1987 | * dest leaf has no holes, so we add there. May need | |
1988 | * to make some room in the entry array. | |
1989 | */ | |
517c2220 DC |
1990 | if (xfs_attr3_leaf_order(save_blk->bp, &savehdr, |
1991 | drop_blk->bp, &drophdr)) { | |
1992 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, | |
1993 | save_leaf, &savehdr, 0, | |
1994 | drophdr.count, mp); | |
1da177e4 | 1995 | } else { |
517c2220 DC |
1996 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, |
1997 | save_leaf, &savehdr, | |
1998 | savehdr.count, drophdr.count, mp); | |
1da177e4 LT |
1999 | } |
2000 | } else { | |
2001 | /* | |
2002 | * Destination has holes, so we make a temporary copy | |
2003 | * of the leaf and add them both to that. | |
2004 | */ | |
517c2220 DC |
2005 | struct xfs_attr_leafblock *tmp_leaf; |
2006 | struct xfs_attr3_icleaf_hdr tmphdr; | |
2007 | ||
8517de2a DC |
2008 | tmp_leaf = kmem_zalloc(state->blocksize, KM_SLEEP); |
2009 | ||
2010 | /* | |
2011 | * Copy the header into the temp leaf so that all the stuff | |
2012 | * not in the incore header is present and gets copied back in | |
2013 | * once we've moved all the entries. | |
2014 | */ | |
2015 | memcpy(tmp_leaf, save_leaf, xfs_attr3_leaf_hdr_size(save_leaf)); | |
517c2220 | 2016 | |
8517de2a | 2017 | memset(&tmphdr, 0, sizeof(tmphdr)); |
517c2220 DC |
2018 | tmphdr.magic = savehdr.magic; |
2019 | tmphdr.forw = savehdr.forw; | |
2020 | tmphdr.back = savehdr.back; | |
2021 | tmphdr.firstused = state->blocksize; | |
8517de2a DC |
2022 | |
2023 | /* write the header to the temp buffer to initialise it */ | |
2024 | xfs_attr3_leaf_hdr_to_disk(tmp_leaf, &tmphdr); | |
2025 | ||
517c2220 DC |
2026 | if (xfs_attr3_leaf_order(save_blk->bp, &savehdr, |
2027 | drop_blk->bp, &drophdr)) { | |
2028 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, | |
2029 | tmp_leaf, &tmphdr, 0, | |
2030 | drophdr.count, mp); | |
2031 | xfs_attr3_leaf_moveents(save_leaf, &savehdr, 0, | |
2032 | tmp_leaf, &tmphdr, tmphdr.count, | |
2033 | savehdr.count, mp); | |
1da177e4 | 2034 | } else { |
517c2220 DC |
2035 | xfs_attr3_leaf_moveents(save_leaf, &savehdr, 0, |
2036 | tmp_leaf, &tmphdr, 0, | |
2037 | savehdr.count, mp); | |
2038 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, | |
2039 | tmp_leaf, &tmphdr, tmphdr.count, | |
2040 | drophdr.count, mp); | |
1da177e4 | 2041 | } |
517c2220 DC |
2042 | memcpy(save_leaf, tmp_leaf, state->blocksize); |
2043 | savehdr = tmphdr; /* struct copy */ | |
2044 | kmem_free(tmp_leaf); | |
1da177e4 LT |
2045 | } |
2046 | ||
517c2220 | 2047 | xfs_attr3_leaf_hdr_to_disk(save_leaf, &savehdr); |
1d9025e5 | 2048 | xfs_trans_log_buf(state->args->trans, save_blk->bp, 0, |
1da177e4 LT |
2049 | state->blocksize - 1); |
2050 | ||
2051 | /* | |
2052 | * Copy out last hashval in each block for B-tree code. | |
2053 | */ | |
517c2220 DC |
2054 | entry = xfs_attr3_leaf_entryp(save_leaf); |
2055 | save_blk->hashval = be32_to_cpu(entry[savehdr.count - 1].hashval); | |
1da177e4 LT |
2056 | } |
2057 | ||
2058 | /*======================================================================== | |
2059 | * Routines used for finding things in the Btree. | |
2060 | *========================================================================*/ | |
2061 | ||
2062 | /* | |
2063 | * Look up a name in a leaf attribute list structure. | |
2064 | * This is the internal routine, it uses the caller's buffer. | |
2065 | * | |
2066 | * Note that duplicate keys are allowed, but only check within the | |
2067 | * current leaf node. The Btree code must check in adjacent leaf nodes. | |
2068 | * | |
2069 | * Return in args->index the index into the entry[] array of either | |
2070 | * the found entry, or where the entry should have been (insert before | |
2071 | * that entry). | |
2072 | * | |
2073 | * Don't change the args->value unless we find the attribute. | |
2074 | */ | |
2075 | int | |
517c2220 DC |
2076 | xfs_attr3_leaf_lookup_int( |
2077 | struct xfs_buf *bp, | |
2078 | struct xfs_da_args *args) | |
1da177e4 | 2079 | { |
517c2220 DC |
2080 | struct xfs_attr_leafblock *leaf; |
2081 | struct xfs_attr3_icleaf_hdr ichdr; | |
2082 | struct xfs_attr_leaf_entry *entry; | |
2083 | struct xfs_attr_leaf_entry *entries; | |
2084 | struct xfs_attr_leaf_name_local *name_loc; | |
2085 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2086 | xfs_dahash_t hashval; | |
2087 | int probe; | |
2088 | int span; | |
1da177e4 | 2089 | |
5a5881cd DC |
2090 | trace_xfs_attr_leaf_lookup(args); |
2091 | ||
1d9025e5 | 2092 | leaf = bp->b_addr; |
517c2220 DC |
2093 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
2094 | entries = xfs_attr3_leaf_entryp(leaf); | |
2095 | ASSERT(ichdr.count < XFS_LBSIZE(args->dp->i_mount) / 8); | |
1da177e4 LT |
2096 | |
2097 | /* | |
2098 | * Binary search. (note: small blocks will skip this loop) | |
2099 | */ | |
2100 | hashval = args->hashval; | |
517c2220 DC |
2101 | probe = span = ichdr.count / 2; |
2102 | for (entry = &entries[probe]; span > 4; entry = &entries[probe]) { | |
1da177e4 | 2103 | span /= 2; |
6b19f2d8 | 2104 | if (be32_to_cpu(entry->hashval) < hashval) |
1da177e4 | 2105 | probe += span; |
6b19f2d8 | 2106 | else if (be32_to_cpu(entry->hashval) > hashval) |
1da177e4 LT |
2107 | probe -= span; |
2108 | else | |
2109 | break; | |
2110 | } | |
517c2220 DC |
2111 | ASSERT(probe >= 0 && (!ichdr.count || probe < ichdr.count)); |
2112 | ASSERT(span <= 4 || be32_to_cpu(entry->hashval) == hashval); | |
1da177e4 LT |
2113 | |
2114 | /* | |
2115 | * Since we may have duplicate hashval's, find the first matching | |
2116 | * hashval in the leaf. | |
2117 | */ | |
517c2220 | 2118 | while (probe > 0 && be32_to_cpu(entry->hashval) >= hashval) { |
1da177e4 LT |
2119 | entry--; |
2120 | probe--; | |
2121 | } | |
517c2220 DC |
2122 | while (probe < ichdr.count && |
2123 | be32_to_cpu(entry->hashval) < hashval) { | |
1da177e4 LT |
2124 | entry++; |
2125 | probe++; | |
2126 | } | |
517c2220 | 2127 | if (probe == ichdr.count || be32_to_cpu(entry->hashval) != hashval) { |
1da177e4 | 2128 | args->index = probe; |
517c2220 | 2129 | return XFS_ERROR(ENOATTR); |
1da177e4 LT |
2130 | } |
2131 | ||
2132 | /* | |
2133 | * Duplicate keys may be present, so search all of them for a match. | |
2134 | */ | |
517c2220 | 2135 | for (; probe < ichdr.count && (be32_to_cpu(entry->hashval) == hashval); |
1da177e4 LT |
2136 | entry++, probe++) { |
2137 | /* | |
2138 | * GROT: Add code to remove incomplete entries. | |
2139 | */ | |
2140 | /* | |
2141 | * If we are looking for INCOMPLETE entries, show only those. | |
2142 | * If we are looking for complete entries, show only those. | |
2143 | */ | |
2144 | if ((args->flags & XFS_ATTR_INCOMPLETE) != | |
2145 | (entry->flags & XFS_ATTR_INCOMPLETE)) { | |
2146 | continue; | |
2147 | } | |
2148 | if (entry->flags & XFS_ATTR_LOCAL) { | |
517c2220 | 2149 | name_loc = xfs_attr3_leaf_name_local(leaf, probe); |
1da177e4 LT |
2150 | if (name_loc->namelen != args->namelen) |
2151 | continue; | |
517c2220 DC |
2152 | if (memcmp(args->name, name_loc->nameval, |
2153 | args->namelen) != 0) | |
1da177e4 | 2154 | continue; |
726801ba | 2155 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
1da177e4 LT |
2156 | continue; |
2157 | args->index = probe; | |
517c2220 | 2158 | return XFS_ERROR(EEXIST); |
1da177e4 | 2159 | } else { |
517c2220 | 2160 | name_rmt = xfs_attr3_leaf_name_remote(leaf, probe); |
1da177e4 LT |
2161 | if (name_rmt->namelen != args->namelen) |
2162 | continue; | |
517c2220 DC |
2163 | if (memcmp(args->name, name_rmt->name, |
2164 | args->namelen) != 0) | |
1da177e4 | 2165 | continue; |
726801ba | 2166 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
1da177e4 LT |
2167 | continue; |
2168 | args->index = probe; | |
e461fcb1 | 2169 | args->valuelen = be32_to_cpu(name_rmt->valuelen); |
c0f054e7 | 2170 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
ad1858d7 DC |
2171 | args->rmtblkcnt = xfs_attr3_rmt_blocks( |
2172 | args->dp->i_mount, | |
2173 | args->valuelen); | |
517c2220 | 2174 | return XFS_ERROR(EEXIST); |
1da177e4 LT |
2175 | } |
2176 | } | |
2177 | args->index = probe; | |
517c2220 | 2178 | return XFS_ERROR(ENOATTR); |
1da177e4 LT |
2179 | } |
2180 | ||
2181 | /* | |
2182 | * Get the value associated with an attribute name from a leaf attribute | |
2183 | * list structure. | |
2184 | */ | |
2185 | int | |
517c2220 DC |
2186 | xfs_attr3_leaf_getvalue( |
2187 | struct xfs_buf *bp, | |
2188 | struct xfs_da_args *args) | |
1da177e4 | 2189 | { |
517c2220 DC |
2190 | struct xfs_attr_leafblock *leaf; |
2191 | struct xfs_attr3_icleaf_hdr ichdr; | |
2192 | struct xfs_attr_leaf_entry *entry; | |
2193 | struct xfs_attr_leaf_name_local *name_loc; | |
2194 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2195 | int valuelen; | |
1da177e4 | 2196 | |
1d9025e5 | 2197 | leaf = bp->b_addr; |
517c2220 DC |
2198 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
2199 | ASSERT(ichdr.count < XFS_LBSIZE(args->dp->i_mount) / 8); | |
2200 | ASSERT(args->index < ichdr.count); | |
1da177e4 | 2201 | |
517c2220 | 2202 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
1da177e4 | 2203 | if (entry->flags & XFS_ATTR_LOCAL) { |
517c2220 | 2204 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
1da177e4 LT |
2205 | ASSERT(name_loc->namelen == args->namelen); |
2206 | ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0); | |
053b5758 | 2207 | valuelen = be16_to_cpu(name_loc->valuelen); |
1da177e4 LT |
2208 | if (args->flags & ATTR_KERNOVAL) { |
2209 | args->valuelen = valuelen; | |
517c2220 | 2210 | return 0; |
1da177e4 LT |
2211 | } |
2212 | if (args->valuelen < valuelen) { | |
2213 | args->valuelen = valuelen; | |
517c2220 | 2214 | return XFS_ERROR(ERANGE); |
1da177e4 LT |
2215 | } |
2216 | args->valuelen = valuelen; | |
2217 | memcpy(args->value, &name_loc->nameval[args->namelen], valuelen); | |
2218 | } else { | |
517c2220 | 2219 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2220 | ASSERT(name_rmt->namelen == args->namelen); |
2221 | ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0); | |
c0f054e7 NS |
2222 | valuelen = be32_to_cpu(name_rmt->valuelen); |
2223 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); | |
ad1858d7 DC |
2224 | args->rmtblkcnt = xfs_attr3_rmt_blocks(args->dp->i_mount, |
2225 | valuelen); | |
1da177e4 LT |
2226 | if (args->flags & ATTR_KERNOVAL) { |
2227 | args->valuelen = valuelen; | |
517c2220 | 2228 | return 0; |
1da177e4 LT |
2229 | } |
2230 | if (args->valuelen < valuelen) { | |
2231 | args->valuelen = valuelen; | |
517c2220 | 2232 | return XFS_ERROR(ERANGE); |
1da177e4 LT |
2233 | } |
2234 | args->valuelen = valuelen; | |
2235 | } | |
517c2220 | 2236 | return 0; |
1da177e4 LT |
2237 | } |
2238 | ||
2239 | /*======================================================================== | |
2240 | * Utility routines. | |
2241 | *========================================================================*/ | |
2242 | ||
2243 | /* | |
2244 | * Move the indicated entries from one leaf to another. | |
2245 | * NOTE: this routine modifies both source and destination leaves. | |
2246 | */ | |
2247 | /*ARGSUSED*/ | |
2248 | STATIC void | |
517c2220 DC |
2249 | xfs_attr3_leaf_moveents( |
2250 | struct xfs_attr_leafblock *leaf_s, | |
2251 | struct xfs_attr3_icleaf_hdr *ichdr_s, | |
2252 | int start_s, | |
2253 | struct xfs_attr_leafblock *leaf_d, | |
2254 | struct xfs_attr3_icleaf_hdr *ichdr_d, | |
2255 | int start_d, | |
2256 | int count, | |
2257 | struct xfs_mount *mp) | |
1da177e4 | 2258 | { |
517c2220 DC |
2259 | struct xfs_attr_leaf_entry *entry_s; |
2260 | struct xfs_attr_leaf_entry *entry_d; | |
2261 | int desti; | |
2262 | int tmp; | |
2263 | int i; | |
1da177e4 LT |
2264 | |
2265 | /* | |
2266 | * Check for nothing to do. | |
2267 | */ | |
2268 | if (count == 0) | |
2269 | return; | |
2270 | ||
2271 | /* | |
2272 | * Set up environment. | |
2273 | */ | |
517c2220 DC |
2274 | ASSERT(ichdr_s->magic == XFS_ATTR_LEAF_MAGIC || |
2275 | ichdr_s->magic == XFS_ATTR3_LEAF_MAGIC); | |
2276 | ASSERT(ichdr_s->magic == ichdr_d->magic); | |
2277 | ASSERT(ichdr_s->count > 0 && ichdr_s->count < XFS_LBSIZE(mp) / 8); | |
2278 | ASSERT(ichdr_s->firstused >= (ichdr_s->count * sizeof(*entry_s)) | |
2279 | + xfs_attr3_leaf_hdr_size(leaf_s)); | |
2280 | ASSERT(ichdr_d->count < XFS_LBSIZE(mp) / 8); | |
2281 | ASSERT(ichdr_d->firstused >= (ichdr_d->count * sizeof(*entry_d)) | |
2282 | + xfs_attr3_leaf_hdr_size(leaf_d)); | |
2283 | ||
2284 | ASSERT(start_s < ichdr_s->count); | |
2285 | ASSERT(start_d <= ichdr_d->count); | |
2286 | ASSERT(count <= ichdr_s->count); | |
2287 | ||
1da177e4 LT |
2288 | |
2289 | /* | |
2290 | * Move the entries in the destination leaf up to make a hole? | |
2291 | */ | |
517c2220 DC |
2292 | if (start_d < ichdr_d->count) { |
2293 | tmp = ichdr_d->count - start_d; | |
1da177e4 | 2294 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
517c2220 DC |
2295 | entry_s = &xfs_attr3_leaf_entryp(leaf_d)[start_d]; |
2296 | entry_d = &xfs_attr3_leaf_entryp(leaf_d)[start_d + count]; | |
2297 | memmove(entry_d, entry_s, tmp); | |
1da177e4 LT |
2298 | } |
2299 | ||
2300 | /* | |
2301 | * Copy all entry's in the same (sorted) order, | |
2302 | * but allocate attribute info packed and in sequence. | |
2303 | */ | |
517c2220 DC |
2304 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
2305 | entry_d = &xfs_attr3_leaf_entryp(leaf_d)[start_d]; | |
1da177e4 LT |
2306 | desti = start_d; |
2307 | for (i = 0; i < count; entry_s++, entry_d++, desti++, i++) { | |
517c2220 | 2308 | ASSERT(be16_to_cpu(entry_s->nameidx) >= ichdr_s->firstused); |
1da177e4 LT |
2309 | tmp = xfs_attr_leaf_entsize(leaf_s, start_s + i); |
2310 | #ifdef GROT | |
2311 | /* | |
2312 | * Code to drop INCOMPLETE entries. Difficult to use as we | |
2313 | * may also need to change the insertion index. Code turned | |
2314 | * off for 6.2, should be revisited later. | |
2315 | */ | |
2316 | if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */ | |
517c2220 DC |
2317 | memset(xfs_attr3_leaf_name(leaf_s, start_s + i), 0, tmp); |
2318 | ichdr_s->usedbytes -= tmp; | |
2319 | ichdr_s->count -= 1; | |
1da177e4 LT |
2320 | entry_d--; /* to compensate for ++ in loop hdr */ |
2321 | desti--; | |
2322 | if ((start_s + i) < offset) | |
2323 | result++; /* insertion index adjustment */ | |
2324 | } else { | |
2325 | #endif /* GROT */ | |
517c2220 | 2326 | ichdr_d->firstused -= tmp; |
1da177e4 LT |
2327 | /* both on-disk, don't endian flip twice */ |
2328 | entry_d->hashval = entry_s->hashval; | |
517c2220 | 2329 | entry_d->nameidx = cpu_to_be16(ichdr_d->firstused); |
1da177e4 | 2330 | entry_d->flags = entry_s->flags; |
6b19f2d8 | 2331 | ASSERT(be16_to_cpu(entry_d->nameidx) + tmp |
1da177e4 | 2332 | <= XFS_LBSIZE(mp)); |
517c2220 DC |
2333 | memmove(xfs_attr3_leaf_name(leaf_d, desti), |
2334 | xfs_attr3_leaf_name(leaf_s, start_s + i), tmp); | |
6b19f2d8 | 2335 | ASSERT(be16_to_cpu(entry_s->nameidx) + tmp |
1da177e4 | 2336 | <= XFS_LBSIZE(mp)); |
517c2220 DC |
2337 | memset(xfs_attr3_leaf_name(leaf_s, start_s + i), 0, tmp); |
2338 | ichdr_s->usedbytes -= tmp; | |
2339 | ichdr_d->usedbytes += tmp; | |
2340 | ichdr_s->count -= 1; | |
2341 | ichdr_d->count += 1; | |
2342 | tmp = ichdr_d->count * sizeof(xfs_attr_leaf_entry_t) | |
2343 | + xfs_attr3_leaf_hdr_size(leaf_d); | |
2344 | ASSERT(ichdr_d->firstused >= tmp); | |
1da177e4 LT |
2345 | #ifdef GROT |
2346 | } | |
2347 | #endif /* GROT */ | |
2348 | } | |
2349 | ||
2350 | /* | |
2351 | * Zero out the entries we just copied. | |
2352 | */ | |
517c2220 | 2353 | if (start_s == ichdr_s->count) { |
1da177e4 | 2354 | tmp = count * sizeof(xfs_attr_leaf_entry_t); |
517c2220 | 2355 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
1da177e4 LT |
2356 | ASSERT(((char *)entry_s + tmp) <= |
2357 | ((char *)leaf_s + XFS_LBSIZE(mp))); | |
517c2220 | 2358 | memset(entry_s, 0, tmp); |
1da177e4 LT |
2359 | } else { |
2360 | /* | |
2361 | * Move the remaining entries down to fill the hole, | |
2362 | * then zero the entries at the top. | |
2363 | */ | |
517c2220 DC |
2364 | tmp = (ichdr_s->count - count) * sizeof(xfs_attr_leaf_entry_t); |
2365 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s + count]; | |
2366 | entry_d = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; | |
2367 | memmove(entry_d, entry_s, tmp); | |
1da177e4 LT |
2368 | |
2369 | tmp = count * sizeof(xfs_attr_leaf_entry_t); | |
517c2220 | 2370 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[ichdr_s->count]; |
1da177e4 LT |
2371 | ASSERT(((char *)entry_s + tmp) <= |
2372 | ((char *)leaf_s + XFS_LBSIZE(mp))); | |
517c2220 | 2373 | memset(entry_s, 0, tmp); |
1da177e4 LT |
2374 | } |
2375 | ||
2376 | /* | |
2377 | * Fill in the freemap information | |
2378 | */ | |
517c2220 DC |
2379 | ichdr_d->freemap[0].base = xfs_attr3_leaf_hdr_size(leaf_d); |
2380 | ichdr_d->freemap[0].base += ichdr_d->count * sizeof(xfs_attr_leaf_entry_t); | |
2381 | ichdr_d->freemap[0].size = ichdr_d->firstused - ichdr_d->freemap[0].base; | |
2382 | ichdr_d->freemap[1].base = 0; | |
2383 | ichdr_d->freemap[2].base = 0; | |
2384 | ichdr_d->freemap[1].size = 0; | |
2385 | ichdr_d->freemap[2].size = 0; | |
2386 | ichdr_s->holes = 1; /* leaf may not be compact */ | |
1da177e4 LT |
2387 | } |
2388 | ||
2389 | /* | |
2390 | * Pick up the last hashvalue from a leaf block. | |
2391 | */ | |
2392 | xfs_dahash_t | |
1d9025e5 DC |
2393 | xfs_attr_leaf_lasthash( |
2394 | struct xfs_buf *bp, | |
2395 | int *count) | |
1da177e4 | 2396 | { |
517c2220 DC |
2397 | struct xfs_attr3_icleaf_hdr ichdr; |
2398 | struct xfs_attr_leaf_entry *entries; | |
1da177e4 | 2399 | |
517c2220 DC |
2400 | xfs_attr3_leaf_hdr_from_disk(&ichdr, bp->b_addr); |
2401 | entries = xfs_attr3_leaf_entryp(bp->b_addr); | |
1da177e4 | 2402 | if (count) |
517c2220 DC |
2403 | *count = ichdr.count; |
2404 | if (!ichdr.count) | |
2405 | return 0; | |
2406 | return be32_to_cpu(entries[ichdr.count - 1].hashval); | |
1da177e4 LT |
2407 | } |
2408 | ||
2409 | /* | |
2410 | * Calculate the number of bytes used to store the indicated attribute | |
2411 | * (whether local or remote only calculate bytes in this block). | |
2412 | */ | |
ba0f32d4 | 2413 | STATIC int |
1da177e4 LT |
2414 | xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index) |
2415 | { | |
517c2220 | 2416 | struct xfs_attr_leaf_entry *entries; |
1da177e4 LT |
2417 | xfs_attr_leaf_name_local_t *name_loc; |
2418 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2419 | int size; | |
2420 | ||
517c2220 DC |
2421 | entries = xfs_attr3_leaf_entryp(leaf); |
2422 | if (entries[index].flags & XFS_ATTR_LOCAL) { | |
2423 | name_loc = xfs_attr3_leaf_name_local(leaf, index); | |
c9fb86a9 | 2424 | size = xfs_attr_leaf_entsize_local(name_loc->namelen, |
053b5758 | 2425 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 | 2426 | } else { |
517c2220 | 2427 | name_rmt = xfs_attr3_leaf_name_remote(leaf, index); |
c9fb86a9 | 2428 | size = xfs_attr_leaf_entsize_remote(name_rmt->namelen); |
1da177e4 | 2429 | } |
517c2220 | 2430 | return size; |
1da177e4 LT |
2431 | } |
2432 | ||
2433 | /* | |
2434 | * Calculate the number of bytes that would be required to store the new | |
2435 | * attribute (whether local or remote only calculate bytes in this block). | |
2436 | * This routine decides as a side effect whether the attribute will be | |
2437 | * a "local" or a "remote" attribute. | |
2438 | */ | |
2439 | int | |
aa82daa0 | 2440 | xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local) |
1da177e4 LT |
2441 | { |
2442 | int size; | |
2443 | ||
c9fb86a9 ES |
2444 | size = xfs_attr_leaf_entsize_local(namelen, valuelen); |
2445 | if (size < xfs_attr_leaf_entsize_local_max(blocksize)) { | |
1da177e4 LT |
2446 | if (local) { |
2447 | *local = 1; | |
2448 | } | |
2449 | } else { | |
c9fb86a9 | 2450 | size = xfs_attr_leaf_entsize_remote(namelen); |
1da177e4 LT |
2451 | if (local) { |
2452 | *local = 0; | |
2453 | } | |
2454 | } | |
517c2220 | 2455 | return size; |
1da177e4 LT |
2456 | } |
2457 | ||
1da177e4 LT |
2458 | |
2459 | /*======================================================================== | |
2460 | * Manage the INCOMPLETE flag in a leaf entry | |
2461 | *========================================================================*/ | |
2462 | ||
2463 | /* | |
2464 | * Clear the INCOMPLETE flag on an entry in a leaf block. | |
2465 | */ | |
2466 | int | |
517c2220 DC |
2467 | xfs_attr3_leaf_clearflag( |
2468 | struct xfs_da_args *args) | |
1da177e4 | 2469 | { |
517c2220 DC |
2470 | struct xfs_attr_leafblock *leaf; |
2471 | struct xfs_attr_leaf_entry *entry; | |
2472 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2473 | struct xfs_buf *bp; | |
2474 | int error; | |
1da177e4 | 2475 | #ifdef DEBUG |
517c2220 | 2476 | struct xfs_attr3_icleaf_hdr ichdr; |
1da177e4 LT |
2477 | xfs_attr_leaf_name_local_t *name_loc; |
2478 | int namelen; | |
2479 | char *name; | |
2480 | #endif /* DEBUG */ | |
2481 | ||
5a5881cd | 2482 | trace_xfs_attr_leaf_clearflag(args); |
1da177e4 LT |
2483 | /* |
2484 | * Set up the operation. | |
2485 | */ | |
517c2220 | 2486 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); |
ad14c33a | 2487 | if (error) |
1da177e4 | 2488 | return(error); |
1da177e4 | 2489 | |
1d9025e5 | 2490 | leaf = bp->b_addr; |
517c2220 | 2491 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
1da177e4 LT |
2492 | ASSERT(entry->flags & XFS_ATTR_INCOMPLETE); |
2493 | ||
2494 | #ifdef DEBUG | |
517c2220 DC |
2495 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
2496 | ASSERT(args->index < ichdr.count); | |
2497 | ASSERT(args->index >= 0); | |
2498 | ||
1da177e4 | 2499 | if (entry->flags & XFS_ATTR_LOCAL) { |
517c2220 | 2500 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
1da177e4 LT |
2501 | namelen = name_loc->namelen; |
2502 | name = (char *)name_loc->nameval; | |
2503 | } else { | |
517c2220 | 2504 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2505 | namelen = name_rmt->namelen; |
2506 | name = (char *)name_rmt->name; | |
2507 | } | |
6b19f2d8 | 2508 | ASSERT(be32_to_cpu(entry->hashval) == args->hashval); |
1da177e4 LT |
2509 | ASSERT(namelen == args->namelen); |
2510 | ASSERT(memcmp(name, args->name, namelen) == 0); | |
2511 | #endif /* DEBUG */ | |
2512 | ||
2513 | entry->flags &= ~XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2514 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2515 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
2516 | ||
2517 | if (args->rmtblkno) { | |
2518 | ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0); | |
517c2220 | 2519 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
c0f054e7 NS |
2520 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
2521 | name_rmt->valuelen = cpu_to_be32(args->valuelen); | |
1d9025e5 | 2522 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2523 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); |
2524 | } | |
1da177e4 LT |
2525 | |
2526 | /* | |
2527 | * Commit the flag value change and start the next trans in series. | |
2528 | */ | |
322ff6b8 | 2529 | return xfs_trans_roll(&args->trans, args->dp); |
1da177e4 LT |
2530 | } |
2531 | ||
2532 | /* | |
2533 | * Set the INCOMPLETE flag on an entry in a leaf block. | |
2534 | */ | |
2535 | int | |
517c2220 DC |
2536 | xfs_attr3_leaf_setflag( |
2537 | struct xfs_da_args *args) | |
1da177e4 | 2538 | { |
517c2220 DC |
2539 | struct xfs_attr_leafblock *leaf; |
2540 | struct xfs_attr_leaf_entry *entry; | |
2541 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2542 | struct xfs_buf *bp; | |
1da177e4 | 2543 | int error; |
517c2220 DC |
2544 | #ifdef DEBUG |
2545 | struct xfs_attr3_icleaf_hdr ichdr; | |
2546 | #endif | |
1da177e4 | 2547 | |
5a5881cd DC |
2548 | trace_xfs_attr_leaf_setflag(args); |
2549 | ||
1da177e4 LT |
2550 | /* |
2551 | * Set up the operation. | |
2552 | */ | |
517c2220 | 2553 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); |
ad14c33a | 2554 | if (error) |
1da177e4 | 2555 | return(error); |
1da177e4 | 2556 | |
1d9025e5 | 2557 | leaf = bp->b_addr; |
517c2220 DC |
2558 | #ifdef DEBUG |
2559 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); | |
2560 | ASSERT(args->index < ichdr.count); | |
1da177e4 | 2561 | ASSERT(args->index >= 0); |
517c2220 DC |
2562 | #endif |
2563 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; | |
1da177e4 LT |
2564 | |
2565 | ASSERT((entry->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2566 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2567 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2568 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
2569 | if ((entry->flags & XFS_ATTR_LOCAL) == 0) { | |
517c2220 | 2570 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
1da177e4 LT |
2571 | name_rmt->valueblk = 0; |
2572 | name_rmt->valuelen = 0; | |
1d9025e5 | 2573 | xfs_trans_log_buf(args->trans, bp, |
1da177e4 LT |
2574 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); |
2575 | } | |
1da177e4 LT |
2576 | |
2577 | /* | |
2578 | * Commit the flag value change and start the next trans in series. | |
2579 | */ | |
322ff6b8 | 2580 | return xfs_trans_roll(&args->trans, args->dp); |
1da177e4 LT |
2581 | } |
2582 | ||
2583 | /* | |
2584 | * In a single transaction, clear the INCOMPLETE flag on the leaf entry | |
2585 | * given by args->blkno/index and set the INCOMPLETE flag on the leaf | |
2586 | * entry given by args->blkno2/index2. | |
2587 | * | |
2588 | * Note that they could be in different blocks, or in the same block. | |
2589 | */ | |
2590 | int | |
517c2220 DC |
2591 | xfs_attr3_leaf_flipflags( |
2592 | struct xfs_da_args *args) | |
1da177e4 | 2593 | { |
517c2220 DC |
2594 | struct xfs_attr_leafblock *leaf1; |
2595 | struct xfs_attr_leafblock *leaf2; | |
2596 | struct xfs_attr_leaf_entry *entry1; | |
2597 | struct xfs_attr_leaf_entry *entry2; | |
2598 | struct xfs_attr_leaf_name_remote *name_rmt; | |
2599 | struct xfs_buf *bp1; | |
2600 | struct xfs_buf *bp2; | |
1da177e4 LT |
2601 | int error; |
2602 | #ifdef DEBUG | |
517c2220 DC |
2603 | struct xfs_attr3_icleaf_hdr ichdr1; |
2604 | struct xfs_attr3_icleaf_hdr ichdr2; | |
1da177e4 LT |
2605 | xfs_attr_leaf_name_local_t *name_loc; |
2606 | int namelen1, namelen2; | |
2607 | char *name1, *name2; | |
2608 | #endif /* DEBUG */ | |
2609 | ||
5a5881cd DC |
2610 | trace_xfs_attr_leaf_flipflags(args); |
2611 | ||
1da177e4 LT |
2612 | /* |
2613 | * Read the block containing the "old" attr | |
2614 | */ | |
517c2220 | 2615 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp1); |
ad14c33a DC |
2616 | if (error) |
2617 | return error; | |
1da177e4 LT |
2618 | |
2619 | /* | |
2620 | * Read the block containing the "new" attr, if it is different | |
2621 | */ | |
2622 | if (args->blkno2 != args->blkno) { | |
517c2220 | 2623 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno2, |
ad14c33a DC |
2624 | -1, &bp2); |
2625 | if (error) | |
2626 | return error; | |
1da177e4 LT |
2627 | } else { |
2628 | bp2 = bp1; | |
2629 | } | |
2630 | ||
1d9025e5 | 2631 | leaf1 = bp1->b_addr; |
517c2220 | 2632 | entry1 = &xfs_attr3_leaf_entryp(leaf1)[args->index]; |
1da177e4 | 2633 | |
1d9025e5 | 2634 | leaf2 = bp2->b_addr; |
517c2220 | 2635 | entry2 = &xfs_attr3_leaf_entryp(leaf2)[args->index2]; |
1da177e4 LT |
2636 | |
2637 | #ifdef DEBUG | |
517c2220 DC |
2638 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1); |
2639 | ASSERT(args->index < ichdr1.count); | |
2640 | ASSERT(args->index >= 0); | |
2641 | ||
2642 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2); | |
2643 | ASSERT(args->index2 < ichdr2.count); | |
2644 | ASSERT(args->index2 >= 0); | |
2645 | ||
1da177e4 | 2646 | if (entry1->flags & XFS_ATTR_LOCAL) { |
517c2220 | 2647 | name_loc = xfs_attr3_leaf_name_local(leaf1, args->index); |
1da177e4 LT |
2648 | namelen1 = name_loc->namelen; |
2649 | name1 = (char *)name_loc->nameval; | |
2650 | } else { | |
517c2220 | 2651 | name_rmt = xfs_attr3_leaf_name_remote(leaf1, args->index); |
1da177e4 LT |
2652 | namelen1 = name_rmt->namelen; |
2653 | name1 = (char *)name_rmt->name; | |
2654 | } | |
2655 | if (entry2->flags & XFS_ATTR_LOCAL) { | |
517c2220 | 2656 | name_loc = xfs_attr3_leaf_name_local(leaf2, args->index2); |
1da177e4 LT |
2657 | namelen2 = name_loc->namelen; |
2658 | name2 = (char *)name_loc->nameval; | |
2659 | } else { | |
517c2220 | 2660 | name_rmt = xfs_attr3_leaf_name_remote(leaf2, args->index2); |
1da177e4 LT |
2661 | namelen2 = name_rmt->namelen; |
2662 | name2 = (char *)name_rmt->name; | |
2663 | } | |
6b19f2d8 | 2664 | ASSERT(be32_to_cpu(entry1->hashval) == be32_to_cpu(entry2->hashval)); |
1da177e4 LT |
2665 | ASSERT(namelen1 == namelen2); |
2666 | ASSERT(memcmp(name1, name2, namelen1) == 0); | |
2667 | #endif /* DEBUG */ | |
2668 | ||
2669 | ASSERT(entry1->flags & XFS_ATTR_INCOMPLETE); | |
2670 | ASSERT((entry2->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2671 | ||
2672 | entry1->flags &= ~XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2673 | xfs_trans_log_buf(args->trans, bp1, |
1da177e4 LT |
2674 | XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1))); |
2675 | if (args->rmtblkno) { | |
2676 | ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0); | |
517c2220 | 2677 | name_rmt = xfs_attr3_leaf_name_remote(leaf1, args->index); |
c0f054e7 NS |
2678 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
2679 | name_rmt->valuelen = cpu_to_be32(args->valuelen); | |
1d9025e5 | 2680 | xfs_trans_log_buf(args->trans, bp1, |
1da177e4 LT |
2681 | XFS_DA_LOGRANGE(leaf1, name_rmt, sizeof(*name_rmt))); |
2682 | } | |
2683 | ||
2684 | entry2->flags |= XFS_ATTR_INCOMPLETE; | |
1d9025e5 | 2685 | xfs_trans_log_buf(args->trans, bp2, |
1da177e4 LT |
2686 | XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2))); |
2687 | if ((entry2->flags & XFS_ATTR_LOCAL) == 0) { | |
517c2220 | 2688 | name_rmt = xfs_attr3_leaf_name_remote(leaf2, args->index2); |
1da177e4 LT |
2689 | name_rmt->valueblk = 0; |
2690 | name_rmt->valuelen = 0; | |
1d9025e5 | 2691 | xfs_trans_log_buf(args->trans, bp2, |
1da177e4 LT |
2692 | XFS_DA_LOGRANGE(leaf2, name_rmt, sizeof(*name_rmt))); |
2693 | } | |
1da177e4 LT |
2694 | |
2695 | /* | |
2696 | * Commit the flag value change and start the next trans in series. | |
2697 | */ | |
322ff6b8 | 2698 | error = xfs_trans_roll(&args->trans, args->dp); |
1da177e4 | 2699 | |
517c2220 | 2700 | return error; |
1da177e4 | 2701 | } |