Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 | 27 | #include "xfs_dir2.h" |
1da177e4 | 28 | #include "xfs_mount.h" |
a844f451 | 29 | #include "xfs_da_btree.h" |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
31 | #include "xfs_dir2_sf.h" |
32 | #include "xfs_dinode.h" | |
33 | #include "xfs_inode.h" | |
34 | #include "xfs_bmap.h" | |
1da177e4 LT |
35 | #include "xfs_dir2_data.h" |
36 | #include "xfs_dir2_leaf.h" | |
37 | #include "xfs_dir2_block.h" | |
38 | #include "xfs_dir2_node.h" | |
1da177e4 | 39 | #include "xfs_error.h" |
0b1b213f | 40 | #include "xfs_trace.h" |
1da177e4 LT |
41 | |
42 | /* | |
43 | * Local function declarations. | |
44 | */ | |
45 | #ifdef DEBUG | |
46 | static void xfs_dir2_leaf_check(xfs_inode_t *dp, xfs_dabuf_t *bp); | |
47 | #else | |
48 | #define xfs_dir2_leaf_check(dp, bp) | |
49 | #endif | |
50 | static int xfs_dir2_leaf_lookup_int(xfs_da_args_t *args, xfs_dabuf_t **lbpp, | |
51 | int *indexp, xfs_dabuf_t **dbpp); | |
ba0f32d4 CH |
52 | static void xfs_dir2_leaf_log_bests(struct xfs_trans *tp, struct xfs_dabuf *bp, |
53 | int first, int last); | |
6add2c42 | 54 | static void xfs_dir2_leaf_log_tail(struct xfs_trans *tp, struct xfs_dabuf *bp); |
ba0f32d4 | 55 | |
1da177e4 LT |
56 | |
57 | /* | |
58 | * Convert a block form directory to a leaf form directory. | |
59 | */ | |
60 | int /* error */ | |
61 | xfs_dir2_block_to_leaf( | |
62 | xfs_da_args_t *args, /* operation arguments */ | |
63 | xfs_dabuf_t *dbp) /* input block's buffer */ | |
64 | { | |
68b3a102 | 65 | __be16 *bestsp; /* leaf's bestsp entries */ |
1da177e4 LT |
66 | xfs_dablk_t blkno; /* leaf block's bno */ |
67 | xfs_dir2_block_t *block; /* block structure */ | |
68 | xfs_dir2_leaf_entry_t *blp; /* block's leaf entries */ | |
69 | xfs_dir2_block_tail_t *btp; /* block's tail */ | |
70 | xfs_inode_t *dp; /* incore directory inode */ | |
71 | int error; /* error return code */ | |
72 | xfs_dabuf_t *lbp; /* leaf block's buffer */ | |
73 | xfs_dir2_db_t ldb; /* leaf block's bno */ | |
74 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
75 | xfs_dir2_leaf_tail_t *ltp; /* leaf's tail */ | |
76 | xfs_mount_t *mp; /* filesystem mount point */ | |
77 | int needlog; /* need to log block header */ | |
78 | int needscan; /* need to rescan bestfree */ | |
79 | xfs_trans_t *tp; /* transaction pointer */ | |
80 | ||
0b1b213f CH |
81 | trace_xfs_dir2_block_to_leaf(args); |
82 | ||
1da177e4 LT |
83 | dp = args->dp; |
84 | mp = dp->i_mount; | |
85 | tp = args->trans; | |
86 | /* | |
87 | * Add the leaf block to the inode. | |
88 | * This interface will only put blocks in the leaf/node range. | |
89 | * Since that's empty now, we'll get the root (block 0 in range). | |
90 | */ | |
91 | if ((error = xfs_da_grow_inode(args, &blkno))) { | |
92 | return error; | |
93 | } | |
bbaaf538 | 94 | ldb = xfs_dir2_da_to_db(mp, blkno); |
1da177e4 LT |
95 | ASSERT(ldb == XFS_DIR2_LEAF_FIRSTDB(mp)); |
96 | /* | |
97 | * Initialize the leaf block, get a buffer for it. | |
98 | */ | |
99 | if ((error = xfs_dir2_leaf_init(args, ldb, &lbp, XFS_DIR2_LEAF1_MAGIC))) { | |
100 | return error; | |
101 | } | |
102 | ASSERT(lbp != NULL); | |
103 | leaf = lbp->data; | |
104 | block = dbp->data; | |
105 | xfs_dir2_data_check(dp, dbp); | |
bbaaf538 CH |
106 | btp = xfs_dir2_block_tail_p(mp, block); |
107 | blp = xfs_dir2_block_leaf_p(btp); | |
1da177e4 LT |
108 | /* |
109 | * Set the counts in the leaf header. | |
110 | */ | |
a818e5de NS |
111 | leaf->hdr.count = cpu_to_be16(be32_to_cpu(btp->count)); |
112 | leaf->hdr.stale = cpu_to_be16(be32_to_cpu(btp->stale)); | |
1da177e4 LT |
113 | /* |
114 | * Could compact these but I think we always do the conversion | |
115 | * after squeezing out stale entries. | |
116 | */ | |
e922fffa | 117 | memcpy(leaf->ents, blp, be32_to_cpu(btp->count) * sizeof(xfs_dir2_leaf_entry_t)); |
a818e5de | 118 | xfs_dir2_leaf_log_ents(tp, lbp, 0, be16_to_cpu(leaf->hdr.count) - 1); |
1da177e4 LT |
119 | needscan = 0; |
120 | needlog = 1; | |
121 | /* | |
122 | * Make the space formerly occupied by the leaf entries and block | |
123 | * tail be free. | |
124 | */ | |
125 | xfs_dir2_data_make_free(tp, dbp, | |
126 | (xfs_dir2_data_aoff_t)((char *)blp - (char *)block), | |
127 | (xfs_dir2_data_aoff_t)((char *)block + mp->m_dirblksize - | |
128 | (char *)blp), | |
129 | &needlog, &needscan); | |
130 | /* | |
131 | * Fix up the block header, make it a data block. | |
132 | */ | |
70e73f59 | 133 | block->hdr.magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC); |
1da177e4 | 134 | if (needscan) |
ef497f8a | 135 | xfs_dir2_data_freescan(mp, (xfs_dir2_data_t *)block, &needlog); |
1da177e4 LT |
136 | /* |
137 | * Set up leaf tail and bests table. | |
138 | */ | |
bbaaf538 | 139 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
afbcb3f9 | 140 | ltp->bestcount = cpu_to_be32(1); |
bbaaf538 | 141 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
70e73f59 | 142 | bestsp[0] = block->hdr.bestfree[0].length; |
1da177e4 LT |
143 | /* |
144 | * Log the data header and leaf bests table. | |
145 | */ | |
146 | if (needlog) | |
147 | xfs_dir2_data_log_header(tp, dbp); | |
148 | xfs_dir2_leaf_check(dp, lbp); | |
149 | xfs_dir2_data_check(dp, dbp); | |
150 | xfs_dir2_leaf_log_bests(tp, lbp, 0, 0); | |
151 | xfs_da_buf_done(lbp); | |
152 | return 0; | |
153 | } | |
154 | ||
4fb44c82 CH |
155 | struct xfs_dir2_leaf_entry * |
156 | xfs_dir2_leaf_find_entry( | |
157 | xfs_dir2_leaf_t *leaf, /* leaf structure */ | |
158 | int index, /* leaf table position */ | |
159 | int compact, /* need to compact leaves */ | |
160 | int lowstale, /* index of prev stale leaf */ | |
161 | int highstale, /* index of next stale leaf */ | |
162 | int *lfloglow, /* low leaf logging index */ | |
163 | int *lfloghigh) /* high leaf logging index */ | |
164 | { | |
165 | if (!leaf->hdr.stale) { | |
166 | xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */ | |
167 | ||
168 | /* | |
169 | * Now we need to make room to insert the leaf entry. | |
170 | * | |
171 | * If there are no stale entries, just insert a hole at index. | |
172 | */ | |
173 | lep = &leaf->ents[index]; | |
174 | if (index < be16_to_cpu(leaf->hdr.count)) | |
175 | memmove(lep + 1, lep, | |
176 | (be16_to_cpu(leaf->hdr.count) - index) * | |
177 | sizeof(*lep)); | |
178 | ||
179 | /* | |
180 | * Record low and high logging indices for the leaf. | |
181 | */ | |
182 | *lfloglow = index; | |
183 | *lfloghigh = be16_to_cpu(leaf->hdr.count); | |
184 | be16_add_cpu(&leaf->hdr.count, 1); | |
185 | return lep; | |
186 | } | |
187 | ||
188 | /* | |
189 | * There are stale entries. | |
190 | * | |
191 | * We will use one of them for the new entry. It's probably not at | |
192 | * the right location, so we'll have to shift some up or down first. | |
193 | * | |
194 | * If we didn't compact before, we need to find the nearest stale | |
195 | * entries before and after our insertion point. | |
196 | */ | |
197 | if (compact == 0) { | |
198 | /* | |
199 | * Find the first stale entry before the insertion point, | |
200 | * if any. | |
201 | */ | |
202 | for (lowstale = index - 1; | |
203 | lowstale >= 0 && | |
204 | be32_to_cpu(leaf->ents[lowstale].address) != | |
205 | XFS_DIR2_NULL_DATAPTR; | |
206 | lowstale--) | |
207 | continue; | |
208 | ||
209 | /* | |
210 | * Find the next stale entry at or after the insertion point, | |
211 | * if any. Stop if we go so far that the lowstale entry | |
212 | * would be better. | |
213 | */ | |
214 | for (highstale = index; | |
215 | highstale < be16_to_cpu(leaf->hdr.count) && | |
216 | be32_to_cpu(leaf->ents[highstale].address) != | |
217 | XFS_DIR2_NULL_DATAPTR && | |
218 | (lowstale < 0 || | |
219 | index - lowstale - 1 >= highstale - index); | |
220 | highstale++) | |
221 | continue; | |
222 | } | |
223 | ||
224 | /* | |
225 | * If the low one is better, use it. | |
226 | */ | |
227 | if (lowstale >= 0 && | |
228 | (highstale == be16_to_cpu(leaf->hdr.count) || | |
229 | index - lowstale - 1 < highstale - index)) { | |
230 | ASSERT(index - lowstale - 1 >= 0); | |
231 | ASSERT(be32_to_cpu(leaf->ents[lowstale].address) == | |
232 | XFS_DIR2_NULL_DATAPTR); | |
233 | ||
234 | /* | |
235 | * Copy entries up to cover the stale entry and make room | |
236 | * for the new entry. | |
237 | */ | |
238 | if (index - lowstale - 1 > 0) { | |
239 | memmove(&leaf->ents[lowstale], | |
240 | &leaf->ents[lowstale + 1], | |
241 | (index - lowstale - 1) * | |
242 | sizeof(xfs_dir2_leaf_entry_t)); | |
243 | } | |
244 | *lfloglow = MIN(lowstale, *lfloglow); | |
245 | *lfloghigh = MAX(index - 1, *lfloghigh); | |
246 | be16_add_cpu(&leaf->hdr.stale, -1); | |
247 | return &leaf->ents[index - 1]; | |
248 | } | |
249 | ||
250 | /* | |
251 | * The high one is better, so use that one. | |
252 | */ | |
253 | ASSERT(highstale - index >= 0); | |
254 | ASSERT(be32_to_cpu(leaf->ents[highstale].address) == | |
255 | XFS_DIR2_NULL_DATAPTR); | |
256 | ||
257 | /* | |
258 | * Copy entries down to cover the stale entry and make room for the | |
259 | * new entry. | |
260 | */ | |
261 | if (highstale - index > 0) { | |
262 | memmove(&leaf->ents[index + 1], | |
263 | &leaf->ents[index], | |
264 | (highstale - index) * sizeof(xfs_dir2_leaf_entry_t)); | |
265 | } | |
266 | *lfloglow = MIN(index, *lfloglow); | |
267 | *lfloghigh = MAX(highstale, *lfloghigh); | |
268 | be16_add_cpu(&leaf->hdr.stale, -1); | |
269 | return &leaf->ents[index]; | |
270 | } | |
271 | ||
1da177e4 LT |
272 | /* |
273 | * Add an entry to a leaf form directory. | |
274 | */ | |
275 | int /* error */ | |
276 | xfs_dir2_leaf_addname( | |
277 | xfs_da_args_t *args) /* operation arguments */ | |
278 | { | |
68b3a102 | 279 | __be16 *bestsp; /* freespace table in leaf */ |
1da177e4 LT |
280 | int compact; /* need to compact leaves */ |
281 | xfs_dir2_data_t *data; /* data block structure */ | |
282 | xfs_dabuf_t *dbp; /* data block buffer */ | |
283 | xfs_dir2_data_entry_t *dep; /* data block entry */ | |
284 | xfs_inode_t *dp; /* incore directory inode */ | |
285 | xfs_dir2_data_unused_t *dup; /* data unused entry */ | |
286 | int error; /* error return value */ | |
287 | int grown; /* allocated new data block */ | |
288 | int highstale; /* index of next stale leaf */ | |
289 | int i; /* temporary, index */ | |
290 | int index; /* leaf table position */ | |
291 | xfs_dabuf_t *lbp; /* leaf's buffer */ | |
292 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
293 | int length; /* length of new entry */ | |
294 | xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */ | |
295 | int lfloglow; /* low leaf logging index */ | |
296 | int lfloghigh; /* high leaf logging index */ | |
297 | int lowstale; /* index of prev stale leaf */ | |
298 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */ | |
299 | xfs_mount_t *mp; /* filesystem mount point */ | |
300 | int needbytes; /* leaf block bytes needed */ | |
301 | int needlog; /* need to log data header */ | |
302 | int needscan; /* need to rescan data free */ | |
3d693c6e | 303 | __be16 *tagp; /* end of data entry */ |
1da177e4 LT |
304 | xfs_trans_t *tp; /* transaction pointer */ |
305 | xfs_dir2_db_t use_block; /* data block number */ | |
306 | ||
0b1b213f CH |
307 | trace_xfs_dir2_leaf_addname(args); |
308 | ||
1da177e4 LT |
309 | dp = args->dp; |
310 | tp = args->trans; | |
311 | mp = dp->i_mount; | |
312 | /* | |
313 | * Read the leaf block. | |
314 | */ | |
315 | error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp, | |
316 | XFS_DATA_FORK); | |
317 | if (error) { | |
318 | return error; | |
319 | } | |
320 | ASSERT(lbp != NULL); | |
321 | /* | |
322 | * Look up the entry by hash value and name. | |
323 | * We know it's not there, our caller has already done a lookup. | |
324 | * So the index is of the entry to insert in front of. | |
325 | * But if there are dup hash values the index is of the first of those. | |
326 | */ | |
327 | index = xfs_dir2_leaf_search_hash(args, lbp); | |
328 | leaf = lbp->data; | |
bbaaf538 CH |
329 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
330 | bestsp = xfs_dir2_leaf_bests_p(ltp); | |
331 | length = xfs_dir2_data_entsize(args->namelen); | |
1da177e4 LT |
332 | /* |
333 | * See if there are any entries with the same hash value | |
334 | * and space in their block for the new entry. | |
335 | * This is good because it puts multiple same-hash value entries | |
336 | * in a data block, improving the lookup of those entries. | |
337 | */ | |
338 | for (use_block = -1, lep = &leaf->ents[index]; | |
3c1f9c15 | 339 | index < be16_to_cpu(leaf->hdr.count) && be32_to_cpu(lep->hashval) == args->hashval; |
1da177e4 | 340 | index++, lep++) { |
3c1f9c15 | 341 | if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 | 342 | continue; |
bbaaf538 | 343 | i = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address)); |
afbcb3f9 | 344 | ASSERT(i < be32_to_cpu(ltp->bestcount)); |
68b3a102 NS |
345 | ASSERT(be16_to_cpu(bestsp[i]) != NULLDATAOFF); |
346 | if (be16_to_cpu(bestsp[i]) >= length) { | |
1da177e4 LT |
347 | use_block = i; |
348 | break; | |
349 | } | |
350 | } | |
351 | /* | |
352 | * Didn't find a block yet, linear search all the data blocks. | |
353 | */ | |
354 | if (use_block == -1) { | |
afbcb3f9 | 355 | for (i = 0; i < be32_to_cpu(ltp->bestcount); i++) { |
1da177e4 LT |
356 | /* |
357 | * Remember a block we see that's missing. | |
358 | */ | |
68b3a102 | 359 | if (be16_to_cpu(bestsp[i]) == NULLDATAOFF && use_block == -1) |
1da177e4 | 360 | use_block = i; |
68b3a102 | 361 | else if (be16_to_cpu(bestsp[i]) >= length) { |
1da177e4 LT |
362 | use_block = i; |
363 | break; | |
364 | } | |
365 | } | |
366 | } | |
367 | /* | |
368 | * How many bytes do we need in the leaf block? | |
369 | */ | |
370 | needbytes = | |
371 | (leaf->hdr.stale ? 0 : (uint)sizeof(leaf->ents[0])) + | |
372 | (use_block != -1 ? 0 : (uint)sizeof(leaf->bests[0])); | |
373 | /* | |
374 | * Now kill use_block if it refers to a missing block, so we | |
375 | * can use it as an indication of allocation needed. | |
376 | */ | |
68b3a102 | 377 | if (use_block != -1 && be16_to_cpu(bestsp[use_block]) == NULLDATAOFF) |
1da177e4 LT |
378 | use_block = -1; |
379 | /* | |
380 | * If we don't have enough free bytes but we can make enough | |
381 | * by compacting out stale entries, we'll do that. | |
382 | */ | |
6a178100 BN |
383 | if ((char *)bestsp - (char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] < |
384 | needbytes && be16_to_cpu(leaf->hdr.stale) > 1) { | |
1da177e4 LT |
385 | compact = 1; |
386 | } | |
387 | /* | |
388 | * Otherwise if we don't have enough free bytes we need to | |
389 | * convert to node form. | |
390 | */ | |
6a178100 BN |
391 | else if ((char *)bestsp - (char *)&leaf->ents[be16_to_cpu( |
392 | leaf->hdr.count)] < needbytes) { | |
1da177e4 LT |
393 | /* |
394 | * Just checking or no space reservation, give up. | |
395 | */ | |
6a178100 BN |
396 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || |
397 | args->total == 0) { | |
1da177e4 LT |
398 | xfs_da_brelse(tp, lbp); |
399 | return XFS_ERROR(ENOSPC); | |
400 | } | |
401 | /* | |
402 | * Convert to node form. | |
403 | */ | |
404 | error = xfs_dir2_leaf_to_node(args, lbp); | |
405 | xfs_da_buf_done(lbp); | |
406 | if (error) | |
407 | return error; | |
408 | /* | |
409 | * Then add the new entry. | |
410 | */ | |
411 | return xfs_dir2_node_addname(args); | |
412 | } | |
413 | /* | |
414 | * Otherwise it will fit without compaction. | |
415 | */ | |
416 | else | |
417 | compact = 0; | |
418 | /* | |
419 | * If just checking, then it will fit unless we needed to allocate | |
420 | * a new data block. | |
421 | */ | |
6a178100 | 422 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) { |
1da177e4 LT |
423 | xfs_da_brelse(tp, lbp); |
424 | return use_block == -1 ? XFS_ERROR(ENOSPC) : 0; | |
425 | } | |
426 | /* | |
427 | * If no allocations are allowed, return now before we've | |
428 | * changed anything. | |
429 | */ | |
430 | if (args->total == 0 && use_block == -1) { | |
431 | xfs_da_brelse(tp, lbp); | |
432 | return XFS_ERROR(ENOSPC); | |
433 | } | |
434 | /* | |
435 | * Need to compact the leaf entries, removing stale ones. | |
436 | * Leave one stale entry behind - the one closest to our | |
437 | * insertion index - and we'll shift that one to our insertion | |
438 | * point later. | |
439 | */ | |
440 | if (compact) { | |
441 | xfs_dir2_leaf_compact_x1(lbp, &index, &lowstale, &highstale, | |
442 | &lfloglow, &lfloghigh); | |
443 | } | |
444 | /* | |
445 | * There are stale entries, so we'll need log-low and log-high | |
446 | * impossibly bad values later. | |
447 | */ | |
a818e5de NS |
448 | else if (be16_to_cpu(leaf->hdr.stale)) { |
449 | lfloglow = be16_to_cpu(leaf->hdr.count); | |
1da177e4 LT |
450 | lfloghigh = -1; |
451 | } | |
452 | /* | |
453 | * If there was no data block space found, we need to allocate | |
454 | * a new one. | |
455 | */ | |
456 | if (use_block == -1) { | |
457 | /* | |
458 | * Add the new data block. | |
459 | */ | |
460 | if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, | |
461 | &use_block))) { | |
462 | xfs_da_brelse(tp, lbp); | |
463 | return error; | |
464 | } | |
465 | /* | |
466 | * Initialize the block. | |
467 | */ | |
468 | if ((error = xfs_dir2_data_init(args, use_block, &dbp))) { | |
469 | xfs_da_brelse(tp, lbp); | |
470 | return error; | |
471 | } | |
472 | /* | |
473 | * If we're adding a new data block on the end we need to | |
474 | * extend the bests table. Copy it up one entry. | |
475 | */ | |
afbcb3f9 | 476 | if (use_block >= be32_to_cpu(ltp->bestcount)) { |
1da177e4 LT |
477 | bestsp--; |
478 | memmove(&bestsp[0], &bestsp[1], | |
afbcb3f9 | 479 | be32_to_cpu(ltp->bestcount) * sizeof(bestsp[0])); |
413d57c9 | 480 | be32_add_cpu(<p->bestcount, 1); |
1da177e4 | 481 | xfs_dir2_leaf_log_tail(tp, lbp); |
afbcb3f9 | 482 | xfs_dir2_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
1da177e4 LT |
483 | } |
484 | /* | |
485 | * If we're filling in a previously empty block just log it. | |
486 | */ | |
487 | else | |
488 | xfs_dir2_leaf_log_bests(tp, lbp, use_block, use_block); | |
489 | data = dbp->data; | |
70e73f59 | 490 | bestsp[use_block] = data->hdr.bestfree[0].length; |
1da177e4 LT |
491 | grown = 1; |
492 | } | |
493 | /* | |
494 | * Already had space in some data block. | |
495 | * Just read that one in. | |
496 | */ | |
497 | else { | |
498 | if ((error = | |
bbaaf538 | 499 | xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, use_block), |
1da177e4 LT |
500 | -1, &dbp, XFS_DATA_FORK))) { |
501 | xfs_da_brelse(tp, lbp); | |
502 | return error; | |
503 | } | |
504 | data = dbp->data; | |
505 | grown = 0; | |
506 | } | |
507 | xfs_dir2_data_check(dp, dbp); | |
508 | /* | |
509 | * Point to the biggest freespace in our data block. | |
510 | */ | |
511 | dup = (xfs_dir2_data_unused_t *) | |
70e73f59 | 512 | ((char *)data + be16_to_cpu(data->hdr.bestfree[0].offset)); |
ad354eb3 | 513 | ASSERT(be16_to_cpu(dup->length) >= length); |
1da177e4 LT |
514 | needscan = needlog = 0; |
515 | /* | |
516 | * Mark the initial part of our freespace in use for the new entry. | |
517 | */ | |
518 | xfs_dir2_data_use_free(tp, dbp, dup, | |
519 | (xfs_dir2_data_aoff_t)((char *)dup - (char *)data), length, | |
520 | &needlog, &needscan); | |
521 | /* | |
522 | * Initialize our new entry (at last). | |
523 | */ | |
524 | dep = (xfs_dir2_data_entry_t *)dup; | |
ff9901c1 | 525 | dep->inumber = cpu_to_be64(args->inumber); |
1da177e4 LT |
526 | dep->namelen = args->namelen; |
527 | memcpy(dep->name, args->name, dep->namelen); | |
bbaaf538 | 528 | tagp = xfs_dir2_data_entry_tag_p(dep); |
3d693c6e | 529 | *tagp = cpu_to_be16((char *)dep - (char *)data); |
1da177e4 LT |
530 | /* |
531 | * Need to scan fix up the bestfree table. | |
532 | */ | |
533 | if (needscan) | |
ef497f8a | 534 | xfs_dir2_data_freescan(mp, data, &needlog); |
1da177e4 LT |
535 | /* |
536 | * Need to log the data block's header. | |
537 | */ | |
538 | if (needlog) | |
539 | xfs_dir2_data_log_header(tp, dbp); | |
540 | xfs_dir2_data_log_entry(tp, dbp, dep); | |
541 | /* | |
542 | * If the bests table needs to be changed, do it. | |
543 | * Log the change unless we've already done that. | |
544 | */ | |
68b3a102 | 545 | if (be16_to_cpu(bestsp[use_block]) != be16_to_cpu(data->hdr.bestfree[0].length)) { |
70e73f59 | 546 | bestsp[use_block] = data->hdr.bestfree[0].length; |
1da177e4 LT |
547 | if (!grown) |
548 | xfs_dir2_leaf_log_bests(tp, lbp, use_block, use_block); | |
549 | } | |
4fb44c82 CH |
550 | |
551 | lep = xfs_dir2_leaf_find_entry(leaf, index, compact, lowstale, | |
552 | highstale, &lfloglow, &lfloghigh); | |
553 | ||
1da177e4 LT |
554 | /* |
555 | * Fill in the new leaf entry. | |
556 | */ | |
3c1f9c15 | 557 | lep->hashval = cpu_to_be32(args->hashval); |
bbaaf538 | 558 | lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(mp, use_block, |
3d693c6e | 559 | be16_to_cpu(*tagp))); |
1da177e4 LT |
560 | /* |
561 | * Log the leaf fields and give up the buffers. | |
562 | */ | |
563 | xfs_dir2_leaf_log_header(tp, lbp); | |
564 | xfs_dir2_leaf_log_ents(tp, lbp, lfloglow, lfloghigh); | |
565 | xfs_dir2_leaf_check(dp, lbp); | |
566 | xfs_da_buf_done(lbp); | |
567 | xfs_dir2_data_check(dp, dbp); | |
568 | xfs_da_buf_done(dbp); | |
569 | return 0; | |
570 | } | |
571 | ||
572 | #ifdef DEBUG | |
573 | /* | |
574 | * Check the internal consistency of a leaf1 block. | |
575 | * Pop an assert if something is wrong. | |
576 | */ | |
3180e66d | 577 | STATIC void |
1da177e4 LT |
578 | xfs_dir2_leaf_check( |
579 | xfs_inode_t *dp, /* incore directory inode */ | |
580 | xfs_dabuf_t *bp) /* leaf's buffer */ | |
581 | { | |
582 | int i; /* leaf index */ | |
583 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
584 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */ | |
585 | xfs_mount_t *mp; /* filesystem mount point */ | |
586 | int stale; /* count of stale leaves */ | |
587 | ||
588 | leaf = bp->data; | |
589 | mp = dp->i_mount; | |
89da0544 | 590 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC); |
1da177e4 LT |
591 | /* |
592 | * This value is not restrictive enough. | |
593 | * Should factor in the size of the bests table as well. | |
594 | * We can deduce a value for that from di_size. | |
595 | */ | |
bbaaf538 CH |
596 | ASSERT(be16_to_cpu(leaf->hdr.count) <= xfs_dir2_max_leaf_ents(mp)); |
597 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); | |
1da177e4 LT |
598 | /* |
599 | * Leaves and bests don't overlap. | |
600 | */ | |
a818e5de | 601 | ASSERT((char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] <= |
bbaaf538 | 602 | (char *)xfs_dir2_leaf_bests_p(ltp)); |
1da177e4 LT |
603 | /* |
604 | * Check hash value order, count stale entries. | |
605 | */ | |
a818e5de NS |
606 | for (i = stale = 0; i < be16_to_cpu(leaf->hdr.count); i++) { |
607 | if (i + 1 < be16_to_cpu(leaf->hdr.count)) | |
3c1f9c15 NS |
608 | ASSERT(be32_to_cpu(leaf->ents[i].hashval) <= |
609 | be32_to_cpu(leaf->ents[i + 1].hashval)); | |
610 | if (be32_to_cpu(leaf->ents[i].address) == XFS_DIR2_NULL_DATAPTR) | |
1da177e4 LT |
611 | stale++; |
612 | } | |
a818e5de | 613 | ASSERT(be16_to_cpu(leaf->hdr.stale) == stale); |
1da177e4 LT |
614 | } |
615 | #endif /* DEBUG */ | |
616 | ||
617 | /* | |
618 | * Compact out any stale entries in the leaf. | |
619 | * Log the header and changed leaf entries, if any. | |
620 | */ | |
621 | void | |
622 | xfs_dir2_leaf_compact( | |
623 | xfs_da_args_t *args, /* operation arguments */ | |
624 | xfs_dabuf_t *bp) /* leaf buffer */ | |
625 | { | |
626 | int from; /* source leaf index */ | |
627 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
628 | int loglow; /* first leaf entry to log */ | |
629 | int to; /* target leaf index */ | |
630 | ||
631 | leaf = bp->data; | |
632 | if (!leaf->hdr.stale) { | |
633 | return; | |
634 | } | |
635 | /* | |
636 | * Compress out the stale entries in place. | |
637 | */ | |
a818e5de | 638 | for (from = to = 0, loglow = -1; from < be16_to_cpu(leaf->hdr.count); from++) { |
3c1f9c15 | 639 | if (be32_to_cpu(leaf->ents[from].address) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
640 | continue; |
641 | /* | |
642 | * Only actually copy the entries that are different. | |
643 | */ | |
644 | if (from > to) { | |
645 | if (loglow == -1) | |
646 | loglow = to; | |
647 | leaf->ents[to] = leaf->ents[from]; | |
648 | } | |
649 | to++; | |
650 | } | |
651 | /* | |
652 | * Update and log the header, log the leaf entries. | |
653 | */ | |
a818e5de | 654 | ASSERT(be16_to_cpu(leaf->hdr.stale) == from - to); |
413d57c9 | 655 | be16_add_cpu(&leaf->hdr.count, -(be16_to_cpu(leaf->hdr.stale))); |
1da177e4 LT |
656 | leaf->hdr.stale = 0; |
657 | xfs_dir2_leaf_log_header(args->trans, bp); | |
658 | if (loglow != -1) | |
659 | xfs_dir2_leaf_log_ents(args->trans, bp, loglow, to - 1); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Compact the leaf entries, removing stale ones. | |
664 | * Leave one stale entry behind - the one closest to our | |
665 | * insertion index - and the caller will shift that one to our insertion | |
666 | * point later. | |
667 | * Return new insertion index, where the remaining stale entry is, | |
668 | * and leaf logging indices. | |
669 | */ | |
670 | void | |
671 | xfs_dir2_leaf_compact_x1( | |
672 | xfs_dabuf_t *bp, /* leaf buffer */ | |
673 | int *indexp, /* insertion index */ | |
674 | int *lowstalep, /* out: stale entry before us */ | |
675 | int *highstalep, /* out: stale entry after us */ | |
676 | int *lowlogp, /* out: low log index */ | |
677 | int *highlogp) /* out: high log index */ | |
678 | { | |
679 | int from; /* source copy index */ | |
680 | int highstale; /* stale entry at/after index */ | |
681 | int index; /* insertion index */ | |
682 | int keepstale; /* source index of kept stale */ | |
683 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
684 | int lowstale; /* stale entry before index */ | |
685 | int newindex=0; /* new insertion index */ | |
686 | int to; /* destination copy index */ | |
687 | ||
688 | leaf = bp->data; | |
a818e5de | 689 | ASSERT(be16_to_cpu(leaf->hdr.stale) > 1); |
1da177e4 LT |
690 | index = *indexp; |
691 | /* | |
692 | * Find the first stale entry before our index, if any. | |
693 | */ | |
694 | for (lowstale = index - 1; | |
695 | lowstale >= 0 && | |
3c1f9c15 | 696 | be32_to_cpu(leaf->ents[lowstale].address) != XFS_DIR2_NULL_DATAPTR; |
1da177e4 LT |
697 | lowstale--) |
698 | continue; | |
699 | /* | |
700 | * Find the first stale entry at or after our index, if any. | |
701 | * Stop if the answer would be worse than lowstale. | |
702 | */ | |
703 | for (highstale = index; | |
a818e5de | 704 | highstale < be16_to_cpu(leaf->hdr.count) && |
3c1f9c15 | 705 | be32_to_cpu(leaf->ents[highstale].address) != XFS_DIR2_NULL_DATAPTR && |
1da177e4 LT |
706 | (lowstale < 0 || index - lowstale > highstale - index); |
707 | highstale++) | |
708 | continue; | |
709 | /* | |
710 | * Pick the better of lowstale and highstale. | |
711 | */ | |
712 | if (lowstale >= 0 && | |
a818e5de | 713 | (highstale == be16_to_cpu(leaf->hdr.count) || |
1da177e4 LT |
714 | index - lowstale <= highstale - index)) |
715 | keepstale = lowstale; | |
716 | else | |
717 | keepstale = highstale; | |
718 | /* | |
719 | * Copy the entries in place, removing all the stale entries | |
720 | * except keepstale. | |
721 | */ | |
a818e5de | 722 | for (from = to = 0; from < be16_to_cpu(leaf->hdr.count); from++) { |
1da177e4 LT |
723 | /* |
724 | * Notice the new value of index. | |
725 | */ | |
726 | if (index == from) | |
727 | newindex = to; | |
728 | if (from != keepstale && | |
3c1f9c15 | 729 | be32_to_cpu(leaf->ents[from].address) == XFS_DIR2_NULL_DATAPTR) { |
1da177e4 LT |
730 | if (from == to) |
731 | *lowlogp = to; | |
732 | continue; | |
733 | } | |
734 | /* | |
735 | * Record the new keepstale value for the insertion. | |
736 | */ | |
737 | if (from == keepstale) | |
738 | lowstale = highstale = to; | |
739 | /* | |
740 | * Copy only the entries that have moved. | |
741 | */ | |
742 | if (from > to) | |
743 | leaf->ents[to] = leaf->ents[from]; | |
744 | to++; | |
745 | } | |
746 | ASSERT(from > to); | |
747 | /* | |
748 | * If the insertion point was past the last entry, | |
749 | * set the new insertion point accordingly. | |
750 | */ | |
751 | if (index == from) | |
752 | newindex = to; | |
753 | *indexp = newindex; | |
754 | /* | |
755 | * Adjust the leaf header values. | |
756 | */ | |
413d57c9 | 757 | be16_add_cpu(&leaf->hdr.count, -(from - to)); |
a818e5de | 758 | leaf->hdr.stale = cpu_to_be16(1); |
1da177e4 LT |
759 | /* |
760 | * Remember the low/high stale value only in the "right" | |
761 | * direction. | |
762 | */ | |
763 | if (lowstale >= newindex) | |
764 | lowstale = -1; | |
765 | else | |
a818e5de NS |
766 | highstale = be16_to_cpu(leaf->hdr.count); |
767 | *highlogp = be16_to_cpu(leaf->hdr.count) - 1; | |
1da177e4 LT |
768 | *lowstalep = lowstale; |
769 | *highstalep = highstale; | |
770 | } | |
771 | ||
772 | /* | |
773 | * Getdents (readdir) for leaf and node directories. | |
774 | * This reads the data blocks only, so is the same for both forms. | |
775 | */ | |
776 | int /* error */ | |
777 | xfs_dir2_leaf_getdents( | |
1da177e4 | 778 | xfs_inode_t *dp, /* incore directory inode */ |
051e7cd4 CH |
779 | void *dirent, |
780 | size_t bufsize, | |
781 | xfs_off_t *offset, | |
782 | filldir_t filldir) | |
1da177e4 LT |
783 | { |
784 | xfs_dabuf_t *bp; /* data block buffer */ | |
785 | int byteoff; /* offset in current block */ | |
786 | xfs_dir2_db_t curdb; /* db for current block */ | |
787 | xfs_dir2_off_t curoff; /* current overall offset */ | |
788 | xfs_dir2_data_t *data; /* data block structure */ | |
789 | xfs_dir2_data_entry_t *dep; /* data entry */ | |
790 | xfs_dir2_data_unused_t *dup; /* unused entry */ | |
f6d75cbe | 791 | int error = 0; /* error return value */ |
1da177e4 LT |
792 | int i; /* temporary loop index */ |
793 | int j; /* temporary loop index */ | |
794 | int length; /* temporary length value */ | |
795 | xfs_bmbt_irec_t *map; /* map vector for blocks */ | |
796 | xfs_extlen_t map_blocks; /* number of fsbs in map */ | |
797 | xfs_dablk_t map_off; /* last mapped file offset */ | |
798 | int map_size; /* total entries in *map */ | |
799 | int map_valid; /* valid entries in *map */ | |
800 | xfs_mount_t *mp; /* filesystem mount point */ | |
801 | xfs_dir2_off_t newoff; /* new curoff after new blk */ | |
802 | int nmap; /* mappings to ask xfs_bmapi */ | |
f6d75cbe | 803 | char *ptr = NULL; /* pointer to current data */ |
1da177e4 LT |
804 | int ra_current; /* number of read-ahead blks */ |
805 | int ra_index; /* *map index for read-ahead */ | |
806 | int ra_offset; /* map entry offset for ra */ | |
807 | int ra_want; /* readahead count wanted */ | |
808 | ||
809 | /* | |
810 | * If the offset is at or past the largest allowed value, | |
051e7cd4 | 811 | * give up right away. |
1da177e4 | 812 | */ |
051e7cd4 | 813 | if (*offset >= XFS_DIR2_MAX_DATAPTR) |
1da177e4 | 814 | return 0; |
051e7cd4 | 815 | |
1da177e4 | 816 | mp = dp->i_mount; |
051e7cd4 | 817 | |
1da177e4 LT |
818 | /* |
819 | * Set up to bmap a number of blocks based on the caller's | |
820 | * buffer size, the directory block size, and the filesystem | |
821 | * block size. | |
822 | */ | |
051e7cd4 | 823 | map_size = howmany(bufsize + mp->m_dirblksize, mp->m_sb.sb_blocksize); |
1da177e4 LT |
824 | map = kmem_alloc(map_size * sizeof(*map), KM_SLEEP); |
825 | map_valid = ra_index = ra_offset = ra_current = map_blocks = 0; | |
826 | bp = NULL; | |
051e7cd4 | 827 | |
1da177e4 LT |
828 | /* |
829 | * Inside the loop we keep the main offset value as a byte offset | |
830 | * in the directory file. | |
831 | */ | |
051e7cd4 CH |
832 | curoff = xfs_dir2_dataptr_to_byte(mp, *offset); |
833 | ||
1da177e4 LT |
834 | /* |
835 | * Force this conversion through db so we truncate the offset | |
836 | * down to get the start of the data block. | |
837 | */ | |
bbaaf538 | 838 | map_off = xfs_dir2_db_to_da(mp, xfs_dir2_byte_to_db(mp, curoff)); |
1da177e4 LT |
839 | /* |
840 | * Loop over directory entries until we reach the end offset. | |
841 | * Get more blocks and readahead as necessary. | |
842 | */ | |
843 | while (curoff < XFS_DIR2_LEAF_OFFSET) { | |
844 | /* | |
845 | * If we have no buffer, or we're off the end of the | |
846 | * current buffer, need to get another one. | |
847 | */ | |
848 | if (!bp || ptr >= (char *)bp->data + mp->m_dirblksize) { | |
849 | /* | |
850 | * If we have a buffer, we need to release it and | |
851 | * take it out of the mapping. | |
852 | */ | |
853 | if (bp) { | |
051e7cd4 | 854 | xfs_da_brelse(NULL, bp); |
1da177e4 LT |
855 | bp = NULL; |
856 | map_blocks -= mp->m_dirblkfsbs; | |
857 | /* | |
858 | * Loop to get rid of the extents for the | |
859 | * directory block. | |
860 | */ | |
861 | for (i = mp->m_dirblkfsbs; i > 0; ) { | |
862 | j = MIN((int)map->br_blockcount, i); | |
863 | map->br_blockcount -= j; | |
864 | map->br_startblock += j; | |
865 | map->br_startoff += j; | |
866 | /* | |
867 | * If mapping is done, pitch it from | |
868 | * the table. | |
869 | */ | |
870 | if (!map->br_blockcount && --map_valid) | |
871 | memmove(&map[0], &map[1], | |
872 | sizeof(map[0]) * | |
873 | map_valid); | |
874 | i -= j; | |
875 | } | |
876 | } | |
877 | /* | |
878 | * Recalculate the readahead blocks wanted. | |
879 | */ | |
051e7cd4 | 880 | ra_want = howmany(bufsize + mp->m_dirblksize, |
1da177e4 | 881 | mp->m_sb.sb_blocksize) - 1; |
8e69ce14 | 882 | ASSERT(ra_want >= 0); |
051e7cd4 | 883 | |
1da177e4 LT |
884 | /* |
885 | * If we don't have as many as we want, and we haven't | |
886 | * run out of data blocks, get some more mappings. | |
887 | */ | |
888 | if (1 + ra_want > map_blocks && | |
889 | map_off < | |
bbaaf538 | 890 | xfs_dir2_byte_to_da(mp, XFS_DIR2_LEAF_OFFSET)) { |
1da177e4 LT |
891 | /* |
892 | * Get more bmaps, fill in after the ones | |
893 | * we already have in the table. | |
894 | */ | |
895 | nmap = map_size - map_valid; | |
051e7cd4 | 896 | error = xfs_bmapi(NULL, dp, |
1da177e4 | 897 | map_off, |
bbaaf538 | 898 | xfs_dir2_byte_to_da(mp, |
1da177e4 LT |
899 | XFS_DIR2_LEAF_OFFSET) - map_off, |
900 | XFS_BMAPI_METADATA, NULL, 0, | |
b4e9181e | 901 | &map[map_valid], &nmap, NULL); |
1da177e4 LT |
902 | /* |
903 | * Don't know if we should ignore this or | |
904 | * try to return an error. | |
905 | * The trouble with returning errors | |
906 | * is that readdir will just stop without | |
907 | * actually passing the error through. | |
908 | */ | |
909 | if (error) | |
910 | break; /* XXX */ | |
911 | /* | |
912 | * If we got all the mappings we asked for, | |
913 | * set the final map offset based on the | |
914 | * last bmap value received. | |
915 | * Otherwise, we've reached the end. | |
916 | */ | |
917 | if (nmap == map_size - map_valid) | |
918 | map_off = | |
919 | map[map_valid + nmap - 1].br_startoff + | |
920 | map[map_valid + nmap - 1].br_blockcount; | |
921 | else | |
922 | map_off = | |
bbaaf538 | 923 | xfs_dir2_byte_to_da(mp, |
1da177e4 LT |
924 | XFS_DIR2_LEAF_OFFSET); |
925 | /* | |
926 | * Look for holes in the mapping, and | |
927 | * eliminate them. Count up the valid blocks. | |
928 | */ | |
929 | for (i = map_valid; i < map_valid + nmap; ) { | |
930 | if (map[i].br_startblock == | |
931 | HOLESTARTBLOCK) { | |
932 | nmap--; | |
933 | length = map_valid + nmap - i; | |
934 | if (length) | |
935 | memmove(&map[i], | |
936 | &map[i + 1], | |
937 | sizeof(map[i]) * | |
938 | length); | |
939 | } else { | |
940 | map_blocks += | |
941 | map[i].br_blockcount; | |
942 | i++; | |
943 | } | |
944 | } | |
945 | map_valid += nmap; | |
946 | } | |
947 | /* | |
948 | * No valid mappings, so no more data blocks. | |
949 | */ | |
950 | if (!map_valid) { | |
bbaaf538 | 951 | curoff = xfs_dir2_da_to_byte(mp, map_off); |
1da177e4 LT |
952 | break; |
953 | } | |
954 | /* | |
955 | * Read the directory block starting at the first | |
956 | * mapping. | |
957 | */ | |
bbaaf538 | 958 | curdb = xfs_dir2_da_to_db(mp, map->br_startoff); |
051e7cd4 | 959 | error = xfs_da_read_buf(NULL, dp, map->br_startoff, |
1da177e4 LT |
960 | map->br_blockcount >= mp->m_dirblkfsbs ? |
961 | XFS_FSB_TO_DADDR(mp, map->br_startblock) : | |
962 | -1, | |
963 | &bp, XFS_DATA_FORK); | |
964 | /* | |
965 | * Should just skip over the data block instead | |
966 | * of giving up. | |
967 | */ | |
968 | if (error) | |
969 | break; /* XXX */ | |
970 | /* | |
971 | * Adjust the current amount of read-ahead: we just | |
972 | * read a block that was previously ra. | |
973 | */ | |
974 | if (ra_current) | |
975 | ra_current -= mp->m_dirblkfsbs; | |
976 | /* | |
977 | * Do we need more readahead? | |
978 | */ | |
979 | for (ra_index = ra_offset = i = 0; | |
980 | ra_want > ra_current && i < map_blocks; | |
981 | i += mp->m_dirblkfsbs) { | |
982 | ASSERT(ra_index < map_valid); | |
983 | /* | |
984 | * Read-ahead a contiguous directory block. | |
985 | */ | |
986 | if (i > ra_current && | |
987 | map[ra_index].br_blockcount >= | |
988 | mp->m_dirblkfsbs) { | |
1a1a3e97 | 989 | xfs_buf_readahead(mp->m_ddev_targp, |
1da177e4 LT |
990 | XFS_FSB_TO_DADDR(mp, |
991 | map[ra_index].br_startblock + | |
992 | ra_offset), | |
993 | (int)BTOBB(mp->m_dirblksize)); | |
994 | ra_current = i; | |
995 | } | |
996 | /* | |
997 | * Read-ahead a non-contiguous directory block. | |
998 | * This doesn't use our mapping, but this | |
999 | * is a very rare case. | |
1000 | */ | |
1001 | else if (i > ra_current) { | |
051e7cd4 | 1002 | (void)xfs_da_reada_buf(NULL, dp, |
1da177e4 LT |
1003 | map[ra_index].br_startoff + |
1004 | ra_offset, XFS_DATA_FORK); | |
1005 | ra_current = i; | |
1006 | } | |
1007 | /* | |
1008 | * Advance offset through the mapping table. | |
1009 | */ | |
1010 | for (j = 0; j < mp->m_dirblkfsbs; j++) { | |
1011 | /* | |
1012 | * The rest of this extent but not | |
1013 | * more than a dir block. | |
1014 | */ | |
1015 | length = MIN(mp->m_dirblkfsbs, | |
1016 | (int)(map[ra_index].br_blockcount - | |
1017 | ra_offset)); | |
1018 | j += length; | |
1019 | ra_offset += length; | |
1020 | /* | |
1021 | * Advance to the next mapping if | |
1022 | * this one is used up. | |
1023 | */ | |
1024 | if (ra_offset == | |
1025 | map[ra_index].br_blockcount) { | |
1026 | ra_offset = 0; | |
1027 | ra_index++; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | /* | |
1032 | * Having done a read, we need to set a new offset. | |
1033 | */ | |
bbaaf538 | 1034 | newoff = xfs_dir2_db_off_to_byte(mp, curdb, 0); |
1da177e4 LT |
1035 | /* |
1036 | * Start of the current block. | |
1037 | */ | |
1038 | if (curoff < newoff) | |
1039 | curoff = newoff; | |
1040 | /* | |
1041 | * Make sure we're in the right block. | |
1042 | */ | |
1043 | else if (curoff > newoff) | |
bbaaf538 | 1044 | ASSERT(xfs_dir2_byte_to_db(mp, curoff) == |
1da177e4 LT |
1045 | curdb); |
1046 | data = bp->data; | |
1047 | xfs_dir2_data_check(dp, bp); | |
1048 | /* | |
1049 | * Find our position in the block. | |
1050 | */ | |
1051 | ptr = (char *)&data->u; | |
bbaaf538 | 1052 | byteoff = xfs_dir2_byte_to_off(mp, curoff); |
1da177e4 LT |
1053 | /* |
1054 | * Skip past the header. | |
1055 | */ | |
1056 | if (byteoff == 0) | |
1057 | curoff += (uint)sizeof(data->hdr); | |
1058 | /* | |
1059 | * Skip past entries until we reach our offset. | |
1060 | */ | |
1061 | else { | |
1062 | while ((char *)ptr - (char *)data < byteoff) { | |
1063 | dup = (xfs_dir2_data_unused_t *)ptr; | |
1064 | ||
ad354eb3 | 1065 | if (be16_to_cpu(dup->freetag) |
1da177e4 LT |
1066 | == XFS_DIR2_DATA_FREE_TAG) { |
1067 | ||
ad354eb3 | 1068 | length = be16_to_cpu(dup->length); |
1da177e4 LT |
1069 | ptr += length; |
1070 | continue; | |
1071 | } | |
1072 | dep = (xfs_dir2_data_entry_t *)ptr; | |
1073 | length = | |
bbaaf538 | 1074 | xfs_dir2_data_entsize(dep->namelen); |
1da177e4 LT |
1075 | ptr += length; |
1076 | } | |
1077 | /* | |
1078 | * Now set our real offset. | |
1079 | */ | |
1080 | curoff = | |
bbaaf538 CH |
1081 | xfs_dir2_db_off_to_byte(mp, |
1082 | xfs_dir2_byte_to_db(mp, curoff), | |
1da177e4 LT |
1083 | (char *)ptr - (char *)data); |
1084 | if (ptr >= (char *)data + mp->m_dirblksize) { | |
1085 | continue; | |
1086 | } | |
1087 | } | |
1088 | } | |
1089 | /* | |
1090 | * We have a pointer to an entry. | |
1091 | * Is it a live one? | |
1092 | */ | |
1093 | dup = (xfs_dir2_data_unused_t *)ptr; | |
1094 | /* | |
1095 | * No, it's unused, skip over it. | |
1096 | */ | |
ad354eb3 NS |
1097 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
1098 | length = be16_to_cpu(dup->length); | |
1da177e4 LT |
1099 | ptr += length; |
1100 | curoff += length; | |
1101 | continue; | |
1102 | } | |
1103 | ||
1da177e4 | 1104 | dep = (xfs_dir2_data_entry_t *)ptr; |
051e7cd4 | 1105 | length = xfs_dir2_data_entsize(dep->namelen); |
1da177e4 | 1106 | |
4a24cb71 | 1107 | if (filldir(dirent, (char *)dep->name, dep->namelen, |
15440319 | 1108 | xfs_dir2_byte_to_dataptr(mp, curoff) & 0x7fffffff, |
a19d9f88 | 1109 | be64_to_cpu(dep->inumber), DT_UNKNOWN)) |
1da177e4 | 1110 | break; |
051e7cd4 | 1111 | |
1da177e4 LT |
1112 | /* |
1113 | * Advance to next entry in the block. | |
1114 | */ | |
1115 | ptr += length; | |
1116 | curoff += length; | |
8e69ce14 ES |
1117 | /* bufsize may have just been a guess; don't go negative */ |
1118 | bufsize = bufsize > length ? bufsize - length : 0; | |
1da177e4 LT |
1119 | } |
1120 | ||
1121 | /* | |
1122 | * All done. Set output offset value to current offset. | |
1123 | */ | |
bbaaf538 | 1124 | if (curoff > xfs_dir2_dataptr_to_byte(mp, XFS_DIR2_MAX_DATAPTR)) |
15440319 | 1125 | *offset = XFS_DIR2_MAX_DATAPTR & 0x7fffffff; |
1da177e4 | 1126 | else |
15440319 | 1127 | *offset = xfs_dir2_byte_to_dataptr(mp, curoff) & 0x7fffffff; |
f0e2d93c | 1128 | kmem_free(map); |
1da177e4 | 1129 | if (bp) |
051e7cd4 | 1130 | xfs_da_brelse(NULL, bp); |
1da177e4 LT |
1131 | return error; |
1132 | } | |
1133 | ||
1134 | /* | |
1135 | * Initialize a new leaf block, leaf1 or leafn magic accepted. | |
1136 | */ | |
1137 | int | |
1138 | xfs_dir2_leaf_init( | |
1139 | xfs_da_args_t *args, /* operation arguments */ | |
1140 | xfs_dir2_db_t bno, /* directory block number */ | |
1141 | xfs_dabuf_t **bpp, /* out: leaf buffer */ | |
1142 | int magic) /* magic number for block */ | |
1143 | { | |
1144 | xfs_dabuf_t *bp; /* leaf buffer */ | |
1145 | xfs_inode_t *dp; /* incore directory inode */ | |
1146 | int error; /* error return code */ | |
1147 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1148 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ | |
1149 | xfs_mount_t *mp; /* filesystem mount point */ | |
1150 | xfs_trans_t *tp; /* transaction pointer */ | |
1151 | ||
1152 | dp = args->dp; | |
1153 | ASSERT(dp != NULL); | |
1154 | tp = args->trans; | |
1155 | mp = dp->i_mount; | |
1156 | ASSERT(bno >= XFS_DIR2_LEAF_FIRSTDB(mp) && | |
1157 | bno < XFS_DIR2_FREE_FIRSTDB(mp)); | |
1158 | /* | |
1159 | * Get the buffer for the block. | |
1160 | */ | |
bbaaf538 | 1161 | error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp, |
1da177e4 LT |
1162 | XFS_DATA_FORK); |
1163 | if (error) { | |
1164 | return error; | |
1165 | } | |
1166 | ASSERT(bp != NULL); | |
1167 | leaf = bp->data; | |
1168 | /* | |
1169 | * Initialize the header. | |
1170 | */ | |
89da0544 | 1171 | leaf->hdr.info.magic = cpu_to_be16(magic); |
1da177e4 LT |
1172 | leaf->hdr.info.forw = 0; |
1173 | leaf->hdr.info.back = 0; | |
1174 | leaf->hdr.count = 0; | |
1175 | leaf->hdr.stale = 0; | |
1176 | xfs_dir2_leaf_log_header(tp, bp); | |
1177 | /* | |
1178 | * If it's a leaf-format directory initialize the tail. | |
1179 | * In this case our caller has the real bests table to copy into | |
1180 | * the block. | |
1181 | */ | |
1182 | if (magic == XFS_DIR2_LEAF1_MAGIC) { | |
bbaaf538 | 1183 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
1da177e4 LT |
1184 | ltp->bestcount = 0; |
1185 | xfs_dir2_leaf_log_tail(tp, bp); | |
1186 | } | |
1187 | *bpp = bp; | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Log the bests entries indicated from a leaf1 block. | |
1193 | */ | |
ba0f32d4 | 1194 | static void |
1da177e4 LT |
1195 | xfs_dir2_leaf_log_bests( |
1196 | xfs_trans_t *tp, /* transaction pointer */ | |
1197 | xfs_dabuf_t *bp, /* leaf buffer */ | |
1198 | int first, /* first entry to log */ | |
1199 | int last) /* last entry to log */ | |
1200 | { | |
68b3a102 NS |
1201 | __be16 *firstb; /* pointer to first entry */ |
1202 | __be16 *lastb; /* pointer to last entry */ | |
1da177e4 LT |
1203 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
1204 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ | |
1205 | ||
1206 | leaf = bp->data; | |
89da0544 | 1207 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC); |
bbaaf538 CH |
1208 | ltp = xfs_dir2_leaf_tail_p(tp->t_mountp, leaf); |
1209 | firstb = xfs_dir2_leaf_bests_p(ltp) + first; | |
1210 | lastb = xfs_dir2_leaf_bests_p(ltp) + last; | |
1da177e4 LT |
1211 | xfs_da_log_buf(tp, bp, (uint)((char *)firstb - (char *)leaf), |
1212 | (uint)((char *)lastb - (char *)leaf + sizeof(*lastb) - 1)); | |
1213 | } | |
1214 | ||
1215 | /* | |
1216 | * Log the leaf entries indicated from a leaf1 or leafn block. | |
1217 | */ | |
1218 | void | |
1219 | xfs_dir2_leaf_log_ents( | |
1220 | xfs_trans_t *tp, /* transaction pointer */ | |
1221 | xfs_dabuf_t *bp, /* leaf buffer */ | |
1222 | int first, /* first entry to log */ | |
1223 | int last) /* last entry to log */ | |
1224 | { | |
1225 | xfs_dir2_leaf_entry_t *firstlep; /* pointer to first entry */ | |
1226 | xfs_dir2_leaf_entry_t *lastlep; /* pointer to last entry */ | |
1227 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1228 | ||
1229 | leaf = bp->data; | |
89da0544 NS |
1230 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC || |
1231 | be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC); | |
1da177e4 LT |
1232 | firstlep = &leaf->ents[first]; |
1233 | lastlep = &leaf->ents[last]; | |
1234 | xfs_da_log_buf(tp, bp, (uint)((char *)firstlep - (char *)leaf), | |
1235 | (uint)((char *)lastlep - (char *)leaf + sizeof(*lastlep) - 1)); | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Log the header of the leaf1 or leafn block. | |
1240 | */ | |
1241 | void | |
1242 | xfs_dir2_leaf_log_header( | |
1243 | xfs_trans_t *tp, /* transaction pointer */ | |
1244 | xfs_dabuf_t *bp) /* leaf buffer */ | |
1245 | { | |
1246 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1247 | ||
1248 | leaf = bp->data; | |
89da0544 NS |
1249 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC || |
1250 | be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC); | |
1da177e4 LT |
1251 | xfs_da_log_buf(tp, bp, (uint)((char *)&leaf->hdr - (char *)leaf), |
1252 | (uint)(sizeof(leaf->hdr) - 1)); | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Log the tail of the leaf1 block. | |
1257 | */ | |
ba0f32d4 | 1258 | STATIC void |
1da177e4 LT |
1259 | xfs_dir2_leaf_log_tail( |
1260 | xfs_trans_t *tp, /* transaction pointer */ | |
1261 | xfs_dabuf_t *bp) /* leaf buffer */ | |
1262 | { | |
1263 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1264 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ | |
1265 | xfs_mount_t *mp; /* filesystem mount point */ | |
1266 | ||
1267 | mp = tp->t_mountp; | |
1268 | leaf = bp->data; | |
89da0544 | 1269 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC); |
bbaaf538 | 1270 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
1da177e4 LT |
1271 | xfs_da_log_buf(tp, bp, (uint)((char *)ltp - (char *)leaf), |
1272 | (uint)(mp->m_dirblksize - 1)); | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Look up the entry referred to by args in the leaf format directory. | |
1277 | * Most of the work is done by the xfs_dir2_leaf_lookup_int routine which | |
1278 | * is also used by the node-format code. | |
1279 | */ | |
1280 | int | |
1281 | xfs_dir2_leaf_lookup( | |
1282 | xfs_da_args_t *args) /* operation arguments */ | |
1283 | { | |
1284 | xfs_dabuf_t *dbp; /* data block buffer */ | |
1285 | xfs_dir2_data_entry_t *dep; /* data block entry */ | |
1286 | xfs_inode_t *dp; /* incore directory inode */ | |
1287 | int error; /* error return code */ | |
1288 | int index; /* found entry index */ | |
1289 | xfs_dabuf_t *lbp; /* leaf buffer */ | |
1290 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1291 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ | |
1292 | xfs_trans_t *tp; /* transaction pointer */ | |
1293 | ||
0b1b213f CH |
1294 | trace_xfs_dir2_leaf_lookup(args); |
1295 | ||
1da177e4 LT |
1296 | /* |
1297 | * Look up name in the leaf block, returning both buffers and index. | |
1298 | */ | |
1299 | if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) { | |
1300 | return error; | |
1301 | } | |
1302 | tp = args->trans; | |
1303 | dp = args->dp; | |
1304 | xfs_dir2_leaf_check(dp, lbp); | |
1305 | leaf = lbp->data; | |
1306 | /* | |
1307 | * Get to the leaf entry and contained data entry address. | |
1308 | */ | |
1309 | lep = &leaf->ents[index]; | |
1310 | /* | |
1311 | * Point to the data entry. | |
1312 | */ | |
1313 | dep = (xfs_dir2_data_entry_t *) | |
1314 | ((char *)dbp->data + | |
bbaaf538 | 1315 | xfs_dir2_dataptr_to_off(dp->i_mount, be32_to_cpu(lep->address))); |
1da177e4 | 1316 | /* |
384f3ced | 1317 | * Return the found inode number & CI name if appropriate |
1da177e4 | 1318 | */ |
ff9901c1 | 1319 | args->inumber = be64_to_cpu(dep->inumber); |
384f3ced | 1320 | error = xfs_dir_cilookup_result(args, dep->name, dep->namelen); |
1da177e4 LT |
1321 | xfs_da_brelse(tp, dbp); |
1322 | xfs_da_brelse(tp, lbp); | |
384f3ced | 1323 | return XFS_ERROR(error); |
1da177e4 LT |
1324 | } |
1325 | ||
1326 | /* | |
1327 | * Look up name/hash in the leaf block. | |
1328 | * Fill in indexp with the found index, and dbpp with the data buffer. | |
1329 | * If not found dbpp will be NULL, and ENOENT comes back. | |
1330 | * lbpp will always be filled in with the leaf buffer unless there's an error. | |
1331 | */ | |
1332 | static int /* error */ | |
1333 | xfs_dir2_leaf_lookup_int( | |
1334 | xfs_da_args_t *args, /* operation arguments */ | |
1335 | xfs_dabuf_t **lbpp, /* out: leaf buffer */ | |
1336 | int *indexp, /* out: index in leaf block */ | |
1337 | xfs_dabuf_t **dbpp) /* out: data buffer */ | |
1338 | { | |
07fe4dd4 BN |
1339 | xfs_dir2_db_t curdb = -1; /* current data block number */ |
1340 | xfs_dabuf_t *dbp = NULL; /* data buffer */ | |
1da177e4 LT |
1341 | xfs_dir2_data_entry_t *dep; /* data entry */ |
1342 | xfs_inode_t *dp; /* incore directory inode */ | |
1343 | int error; /* error return code */ | |
1344 | int index; /* index in leaf block */ | |
1345 | xfs_dabuf_t *lbp; /* leaf buffer */ | |
1346 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ | |
1347 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1348 | xfs_mount_t *mp; /* filesystem mount point */ | |
1349 | xfs_dir2_db_t newdb; /* new data block number */ | |
1350 | xfs_trans_t *tp; /* transaction pointer */ | |
07fe4dd4 | 1351 | xfs_dir2_db_t cidb = -1; /* case match data block no. */ |
5163f95a | 1352 | enum xfs_dacmp cmp; /* name compare result */ |
1da177e4 LT |
1353 | |
1354 | dp = args->dp; | |
1355 | tp = args->trans; | |
1356 | mp = dp->i_mount; | |
1357 | /* | |
1358 | * Read the leaf block into the buffer. | |
1359 | */ | |
07fe4dd4 BN |
1360 | error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp, |
1361 | XFS_DATA_FORK); | |
1362 | if (error) | |
1da177e4 | 1363 | return error; |
1da177e4 LT |
1364 | *lbpp = lbp; |
1365 | leaf = lbp->data; | |
1366 | xfs_dir2_leaf_check(dp, lbp); | |
1367 | /* | |
1368 | * Look for the first leaf entry with our hash value. | |
1369 | */ | |
1370 | index = xfs_dir2_leaf_search_hash(args, lbp); | |
1371 | /* | |
1372 | * Loop over all the entries with the right hash value | |
1373 | * looking to match the name. | |
1374 | */ | |
07fe4dd4 | 1375 | for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) && |
5163f95a BN |
1376 | be32_to_cpu(lep->hashval) == args->hashval; |
1377 | lep++, index++) { | |
1da177e4 LT |
1378 | /* |
1379 | * Skip over stale leaf entries. | |
1380 | */ | |
3c1f9c15 | 1381 | if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
1382 | continue; |
1383 | /* | |
1384 | * Get the new data block number. | |
1385 | */ | |
bbaaf538 | 1386 | newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address)); |
1da177e4 LT |
1387 | /* |
1388 | * If it's not the same as the old data block number, | |
1389 | * need to pitch the old one and read the new one. | |
1390 | */ | |
1391 | if (newdb != curdb) { | |
07fe4dd4 | 1392 | if (dbp) |
1da177e4 | 1393 | xfs_da_brelse(tp, dbp); |
5163f95a BN |
1394 | error = xfs_da_read_buf(tp, dp, |
1395 | xfs_dir2_db_to_da(mp, newdb), | |
1396 | -1, &dbp, XFS_DATA_FORK); | |
1397 | if (error) { | |
1da177e4 LT |
1398 | xfs_da_brelse(tp, lbp); |
1399 | return error; | |
1400 | } | |
1401 | xfs_dir2_data_check(dp, dbp); | |
1402 | curdb = newdb; | |
1403 | } | |
1404 | /* | |
1405 | * Point to the data entry. | |
1406 | */ | |
5163f95a BN |
1407 | dep = (xfs_dir2_data_entry_t *)((char *)dbp->data + |
1408 | xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address))); | |
1da177e4 | 1409 | /* |
5163f95a BN |
1410 | * Compare name and if it's an exact match, return the index |
1411 | * and buffer. If it's the first case-insensitive match, store | |
1412 | * the index and buffer and continue looking for an exact match. | |
1da177e4 | 1413 | */ |
5163f95a BN |
1414 | cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen); |
1415 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
1416 | args->cmpresult = cmp; | |
1da177e4 | 1417 | *indexp = index; |
07fe4dd4 | 1418 | /* case exact match: return the current buffer. */ |
5163f95a | 1419 | if (cmp == XFS_CMP_EXACT) { |
5163f95a BN |
1420 | *dbpp = dbp; |
1421 | return 0; | |
1422 | } | |
07fe4dd4 | 1423 | cidb = curdb; |
1da177e4 LT |
1424 | } |
1425 | } | |
6a178100 | 1426 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a | 1427 | /* |
07fe4dd4 BN |
1428 | * Here, we can only be doing a lookup (not a rename or remove). |
1429 | * If a case-insensitive match was found earlier, re-read the | |
1430 | * appropriate data block if required and return it. | |
5163f95a BN |
1431 | */ |
1432 | if (args->cmpresult == XFS_CMP_CASE) { | |
07fe4dd4 BN |
1433 | ASSERT(cidb != -1); |
1434 | if (cidb != curdb) { | |
5163f95a | 1435 | xfs_da_brelse(tp, dbp); |
07fe4dd4 BN |
1436 | error = xfs_da_read_buf(tp, dp, |
1437 | xfs_dir2_db_to_da(mp, cidb), | |
1438 | -1, &dbp, XFS_DATA_FORK); | |
1439 | if (error) { | |
1440 | xfs_da_brelse(tp, lbp); | |
1441 | return error; | |
1442 | } | |
1443 | } | |
1444 | *dbpp = dbp; | |
5163f95a BN |
1445 | return 0; |
1446 | } | |
1da177e4 LT |
1447 | /* |
1448 | * No match found, return ENOENT. | |
1449 | */ | |
07fe4dd4 | 1450 | ASSERT(cidb == -1); |
1da177e4 LT |
1451 | if (dbp) |
1452 | xfs_da_brelse(tp, dbp); | |
1453 | xfs_da_brelse(tp, lbp); | |
1454 | return XFS_ERROR(ENOENT); | |
1455 | } | |
1456 | ||
1457 | /* | |
1458 | * Remove an entry from a leaf format directory. | |
1459 | */ | |
1460 | int /* error */ | |
1461 | xfs_dir2_leaf_removename( | |
1462 | xfs_da_args_t *args) /* operation arguments */ | |
1463 | { | |
68b3a102 | 1464 | __be16 *bestsp; /* leaf block best freespace */ |
1da177e4 LT |
1465 | xfs_dir2_data_t *data; /* data block structure */ |
1466 | xfs_dir2_db_t db; /* data block number */ | |
1467 | xfs_dabuf_t *dbp; /* data block buffer */ | |
1468 | xfs_dir2_data_entry_t *dep; /* data entry structure */ | |
1469 | xfs_inode_t *dp; /* incore directory inode */ | |
1470 | int error; /* error return code */ | |
1471 | xfs_dir2_db_t i; /* temporary data block # */ | |
1472 | int index; /* index into leaf entries */ | |
1473 | xfs_dabuf_t *lbp; /* leaf buffer */ | |
1474 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1475 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ | |
1476 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ | |
1477 | xfs_mount_t *mp; /* filesystem mount point */ | |
1478 | int needlog; /* need to log data header */ | |
1479 | int needscan; /* need to rescan data frees */ | |
1480 | xfs_dir2_data_off_t oldbest; /* old value of best free */ | |
1481 | xfs_trans_t *tp; /* transaction pointer */ | |
1482 | ||
0b1b213f CH |
1483 | trace_xfs_dir2_leaf_removename(args); |
1484 | ||
1da177e4 LT |
1485 | /* |
1486 | * Lookup the leaf entry, get the leaf and data blocks read in. | |
1487 | */ | |
1488 | if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) { | |
1489 | return error; | |
1490 | } | |
1491 | dp = args->dp; | |
1492 | tp = args->trans; | |
1493 | mp = dp->i_mount; | |
1494 | leaf = lbp->data; | |
1495 | data = dbp->data; | |
1496 | xfs_dir2_data_check(dp, dbp); | |
1497 | /* | |
1498 | * Point to the leaf entry, use that to point to the data entry. | |
1499 | */ | |
1500 | lep = &leaf->ents[index]; | |
bbaaf538 | 1501 | db = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address)); |
1da177e4 | 1502 | dep = (xfs_dir2_data_entry_t *) |
bbaaf538 | 1503 | ((char *)data + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address))); |
1da177e4 | 1504 | needscan = needlog = 0; |
70e73f59 | 1505 | oldbest = be16_to_cpu(data->hdr.bestfree[0].length); |
bbaaf538 CH |
1506 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
1507 | bestsp = xfs_dir2_leaf_bests_p(ltp); | |
68b3a102 | 1508 | ASSERT(be16_to_cpu(bestsp[db]) == oldbest); |
1da177e4 LT |
1509 | /* |
1510 | * Mark the former data entry unused. | |
1511 | */ | |
1512 | xfs_dir2_data_make_free(tp, dbp, | |
1513 | (xfs_dir2_data_aoff_t)((char *)dep - (char *)data), | |
bbaaf538 | 1514 | xfs_dir2_data_entsize(dep->namelen), &needlog, &needscan); |
1da177e4 LT |
1515 | /* |
1516 | * We just mark the leaf entry stale by putting a null in it. | |
1517 | */ | |
413d57c9 | 1518 | be16_add_cpu(&leaf->hdr.stale, 1); |
1da177e4 | 1519 | xfs_dir2_leaf_log_header(tp, lbp); |
3c1f9c15 | 1520 | lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR); |
1da177e4 LT |
1521 | xfs_dir2_leaf_log_ents(tp, lbp, index, index); |
1522 | /* | |
1523 | * Scan the freespace in the data block again if necessary, | |
1524 | * log the data block header if necessary. | |
1525 | */ | |
1526 | if (needscan) | |
ef497f8a | 1527 | xfs_dir2_data_freescan(mp, data, &needlog); |
1da177e4 LT |
1528 | if (needlog) |
1529 | xfs_dir2_data_log_header(tp, dbp); | |
1530 | /* | |
1531 | * If the longest freespace in the data block has changed, | |
1532 | * put the new value in the bests table and log that. | |
1533 | */ | |
70e73f59 NS |
1534 | if (be16_to_cpu(data->hdr.bestfree[0].length) != oldbest) { |
1535 | bestsp[db] = data->hdr.bestfree[0].length; | |
1da177e4 LT |
1536 | xfs_dir2_leaf_log_bests(tp, lbp, db, db); |
1537 | } | |
1538 | xfs_dir2_data_check(dp, dbp); | |
1539 | /* | |
1540 | * If the data block is now empty then get rid of the data block. | |
1541 | */ | |
70e73f59 | 1542 | if (be16_to_cpu(data->hdr.bestfree[0].length) == |
1da177e4 LT |
1543 | mp->m_dirblksize - (uint)sizeof(data->hdr)) { |
1544 | ASSERT(db != mp->m_dirdatablk); | |
1545 | if ((error = xfs_dir2_shrink_inode(args, db, dbp))) { | |
1546 | /* | |
1547 | * Nope, can't get rid of it because it caused | |
1548 | * allocation of a bmap btree block to do so. | |
1549 | * Just go on, returning success, leaving the | |
1550 | * empty block in place. | |
1551 | */ | |
1552 | if (error == ENOSPC && args->total == 0) { | |
1553 | xfs_da_buf_done(dbp); | |
1554 | error = 0; | |
1555 | } | |
1556 | xfs_dir2_leaf_check(dp, lbp); | |
1557 | xfs_da_buf_done(lbp); | |
1558 | return error; | |
1559 | } | |
1560 | dbp = NULL; | |
1561 | /* | |
1562 | * If this is the last data block then compact the | |
1563 | * bests table by getting rid of entries. | |
1564 | */ | |
afbcb3f9 | 1565 | if (db == be32_to_cpu(ltp->bestcount) - 1) { |
1da177e4 LT |
1566 | /* |
1567 | * Look for the last active entry (i). | |
1568 | */ | |
1569 | for (i = db - 1; i > 0; i--) { | |
68b3a102 | 1570 | if (be16_to_cpu(bestsp[i]) != NULLDATAOFF) |
1da177e4 LT |
1571 | break; |
1572 | } | |
1573 | /* | |
1574 | * Copy the table down so inactive entries at the | |
1575 | * end are removed. | |
1576 | */ | |
1577 | memmove(&bestsp[db - i], bestsp, | |
afbcb3f9 | 1578 | (be32_to_cpu(ltp->bestcount) - (db - i)) * sizeof(*bestsp)); |
413d57c9 | 1579 | be32_add_cpu(<p->bestcount, -(db - i)); |
1da177e4 | 1580 | xfs_dir2_leaf_log_tail(tp, lbp); |
afbcb3f9 | 1581 | xfs_dir2_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
1da177e4 | 1582 | } else |
68b3a102 | 1583 | bestsp[db] = cpu_to_be16(NULLDATAOFF); |
1da177e4 LT |
1584 | } |
1585 | /* | |
1586 | * If the data block was not the first one, drop it. | |
1587 | */ | |
1588 | else if (db != mp->m_dirdatablk && dbp != NULL) { | |
1589 | xfs_da_buf_done(dbp); | |
1590 | dbp = NULL; | |
1591 | } | |
1592 | xfs_dir2_leaf_check(dp, lbp); | |
1593 | /* | |
1594 | * See if we can convert to block form. | |
1595 | */ | |
1596 | return xfs_dir2_leaf_to_block(args, lbp, dbp); | |
1597 | } | |
1598 | ||
1599 | /* | |
1600 | * Replace the inode number in a leaf format directory entry. | |
1601 | */ | |
1602 | int /* error */ | |
1603 | xfs_dir2_leaf_replace( | |
1604 | xfs_da_args_t *args) /* operation arguments */ | |
1605 | { | |
1606 | xfs_dabuf_t *dbp; /* data block buffer */ | |
1607 | xfs_dir2_data_entry_t *dep; /* data block entry */ | |
1608 | xfs_inode_t *dp; /* incore directory inode */ | |
1609 | int error; /* error return code */ | |
1610 | int index; /* index of leaf entry */ | |
1611 | xfs_dabuf_t *lbp; /* leaf buffer */ | |
1612 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1613 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ | |
1614 | xfs_trans_t *tp; /* transaction pointer */ | |
1615 | ||
0b1b213f CH |
1616 | trace_xfs_dir2_leaf_replace(args); |
1617 | ||
1da177e4 LT |
1618 | /* |
1619 | * Look up the entry. | |
1620 | */ | |
1621 | if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) { | |
1622 | return error; | |
1623 | } | |
1624 | dp = args->dp; | |
1625 | leaf = lbp->data; | |
1626 | /* | |
1627 | * Point to the leaf entry, get data address from it. | |
1628 | */ | |
1629 | lep = &leaf->ents[index]; | |
1630 | /* | |
1631 | * Point to the data entry. | |
1632 | */ | |
1633 | dep = (xfs_dir2_data_entry_t *) | |
1634 | ((char *)dbp->data + | |
bbaaf538 | 1635 | xfs_dir2_dataptr_to_off(dp->i_mount, be32_to_cpu(lep->address))); |
ff9901c1 | 1636 | ASSERT(args->inumber != be64_to_cpu(dep->inumber)); |
1da177e4 LT |
1637 | /* |
1638 | * Put the new inode number in, log it. | |
1639 | */ | |
ff9901c1 | 1640 | dep->inumber = cpu_to_be64(args->inumber); |
1da177e4 LT |
1641 | tp = args->trans; |
1642 | xfs_dir2_data_log_entry(tp, dbp, dep); | |
1643 | xfs_da_buf_done(dbp); | |
1644 | xfs_dir2_leaf_check(dp, lbp); | |
1645 | xfs_da_brelse(tp, lbp); | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | /* | |
1650 | * Return index in the leaf block (lbp) which is either the first | |
1651 | * one with this hash value, or if there are none, the insert point | |
1652 | * for that hash value. | |
1653 | */ | |
1654 | int /* index value */ | |
1655 | xfs_dir2_leaf_search_hash( | |
1656 | xfs_da_args_t *args, /* operation arguments */ | |
1657 | xfs_dabuf_t *lbp) /* leaf buffer */ | |
1658 | { | |
1659 | xfs_dahash_t hash=0; /* hash from this entry */ | |
1660 | xfs_dahash_t hashwant; /* hash value looking for */ | |
1661 | int high; /* high leaf index */ | |
1662 | int low; /* low leaf index */ | |
1663 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1664 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ | |
1665 | int mid=0; /* current leaf index */ | |
1666 | ||
1667 | leaf = lbp->data; | |
1668 | #ifndef __KERNEL__ | |
1669 | if (!leaf->hdr.count) | |
1670 | return 0; | |
1671 | #endif | |
1672 | /* | |
1673 | * Note, the table cannot be empty, so we have to go through the loop. | |
1674 | * Binary search the leaf entries looking for our hash value. | |
1675 | */ | |
a818e5de | 1676 | for (lep = leaf->ents, low = 0, high = be16_to_cpu(leaf->hdr.count) - 1, |
1da177e4 LT |
1677 | hashwant = args->hashval; |
1678 | low <= high; ) { | |
1679 | mid = (low + high) >> 1; | |
3c1f9c15 | 1680 | if ((hash = be32_to_cpu(lep[mid].hashval)) == hashwant) |
1da177e4 LT |
1681 | break; |
1682 | if (hash < hashwant) | |
1683 | low = mid + 1; | |
1684 | else | |
1685 | high = mid - 1; | |
1686 | } | |
1687 | /* | |
1688 | * Found one, back up through all the equal hash values. | |
1689 | */ | |
1690 | if (hash == hashwant) { | |
3c1f9c15 | 1691 | while (mid > 0 && be32_to_cpu(lep[mid - 1].hashval) == hashwant) { |
1da177e4 LT |
1692 | mid--; |
1693 | } | |
1694 | } | |
1695 | /* | |
1696 | * Need to point to an entry higher than ours. | |
1697 | */ | |
1698 | else if (hash < hashwant) | |
1699 | mid++; | |
1700 | return mid; | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * Trim off a trailing data block. We know it's empty since the leaf | |
1705 | * freespace table says so. | |
1706 | */ | |
1707 | int /* error */ | |
1708 | xfs_dir2_leaf_trim_data( | |
1709 | xfs_da_args_t *args, /* operation arguments */ | |
1710 | xfs_dabuf_t *lbp, /* leaf buffer */ | |
1711 | xfs_dir2_db_t db) /* data block number */ | |
1712 | { | |
68b3a102 | 1713 | __be16 *bestsp; /* leaf bests table */ |
1da177e4 LT |
1714 | #ifdef DEBUG |
1715 | xfs_dir2_data_t *data; /* data block structure */ | |
1716 | #endif | |
1717 | xfs_dabuf_t *dbp; /* data block buffer */ | |
1718 | xfs_inode_t *dp; /* incore directory inode */ | |
1719 | int error; /* error return value */ | |
1720 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1721 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ | |
1722 | xfs_mount_t *mp; /* filesystem mount point */ | |
1723 | xfs_trans_t *tp; /* transaction pointer */ | |
1724 | ||
1725 | dp = args->dp; | |
1726 | mp = dp->i_mount; | |
1727 | tp = args->trans; | |
1728 | /* | |
1729 | * Read the offending data block. We need its buffer. | |
1730 | */ | |
bbaaf538 | 1731 | if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp, |
1da177e4 LT |
1732 | XFS_DATA_FORK))) { |
1733 | return error; | |
1734 | } | |
1735 | #ifdef DEBUG | |
1736 | data = dbp->data; | |
70e73f59 | 1737 | ASSERT(be32_to_cpu(data->hdr.magic) == XFS_DIR2_DATA_MAGIC); |
1da177e4 LT |
1738 | #endif |
1739 | /* this seems to be an error | |
1740 | * data is only valid if DEBUG is defined? | |
1741 | * RMC 09/08/1999 | |
1742 | */ | |
1743 | ||
1744 | leaf = lbp->data; | |
bbaaf538 | 1745 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
70e73f59 | 1746 | ASSERT(be16_to_cpu(data->hdr.bestfree[0].length) == |
1da177e4 | 1747 | mp->m_dirblksize - (uint)sizeof(data->hdr)); |
afbcb3f9 | 1748 | ASSERT(db == be32_to_cpu(ltp->bestcount) - 1); |
1da177e4 LT |
1749 | /* |
1750 | * Get rid of the data block. | |
1751 | */ | |
1752 | if ((error = xfs_dir2_shrink_inode(args, db, dbp))) { | |
1753 | ASSERT(error != ENOSPC); | |
1754 | xfs_da_brelse(tp, dbp); | |
1755 | return error; | |
1756 | } | |
1757 | /* | |
1758 | * Eliminate the last bests entry from the table. | |
1759 | */ | |
bbaaf538 | 1760 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
413d57c9 | 1761 | be32_add_cpu(<p->bestcount, -1); |
afbcb3f9 | 1762 | memmove(&bestsp[1], &bestsp[0], be32_to_cpu(ltp->bestcount) * sizeof(*bestsp)); |
1da177e4 | 1763 | xfs_dir2_leaf_log_tail(tp, lbp); |
afbcb3f9 | 1764 | xfs_dir2_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
1da177e4 LT |
1765 | return 0; |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * Convert node form directory to leaf form directory. | |
1770 | * The root of the node form dir needs to already be a LEAFN block. | |
1771 | * Just return if we can't do anything. | |
1772 | */ | |
1773 | int /* error */ | |
1774 | xfs_dir2_node_to_leaf( | |
1775 | xfs_da_state_t *state) /* directory operation state */ | |
1776 | { | |
1777 | xfs_da_args_t *args; /* operation arguments */ | |
1778 | xfs_inode_t *dp; /* incore directory inode */ | |
1779 | int error; /* error return code */ | |
1780 | xfs_dabuf_t *fbp; /* buffer for freespace block */ | |
1781 | xfs_fileoff_t fo; /* freespace file offset */ | |
1782 | xfs_dir2_free_t *free; /* freespace structure */ | |
1783 | xfs_dabuf_t *lbp; /* buffer for leaf block */ | |
1784 | xfs_dir2_leaf_tail_t *ltp; /* tail of leaf structure */ | |
1785 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
1786 | xfs_mount_t *mp; /* filesystem mount point */ | |
1787 | int rval; /* successful free trim? */ | |
1788 | xfs_trans_t *tp; /* transaction pointer */ | |
1789 | ||
1790 | /* | |
1791 | * There's more than a leaf level in the btree, so there must | |
1792 | * be multiple leafn blocks. Give up. | |
1793 | */ | |
1794 | if (state->path.active > 1) | |
1795 | return 0; | |
1796 | args = state->args; | |
0b1b213f CH |
1797 | |
1798 | trace_xfs_dir2_node_to_leaf(args); | |
1799 | ||
1da177e4 LT |
1800 | mp = state->mp; |
1801 | dp = args->dp; | |
1802 | tp = args->trans; | |
1803 | /* | |
1804 | * Get the last offset in the file. | |
1805 | */ | |
1806 | if ((error = xfs_bmap_last_offset(tp, dp, &fo, XFS_DATA_FORK))) { | |
1807 | return error; | |
1808 | } | |
1809 | fo -= mp->m_dirblkfsbs; | |
1810 | /* | |
1811 | * If there are freespace blocks other than the first one, | |
1812 | * take this opportunity to remove trailing empty freespace blocks | |
1813 | * that may have been left behind during no-space-reservation | |
1814 | * operations. | |
1815 | */ | |
1816 | while (fo > mp->m_dirfreeblk) { | |
1817 | if ((error = xfs_dir2_node_trim_free(args, fo, &rval))) { | |
1818 | return error; | |
1819 | } | |
1820 | if (rval) | |
1821 | fo -= mp->m_dirblkfsbs; | |
1822 | else | |
1823 | return 0; | |
1824 | } | |
1825 | /* | |
1826 | * Now find the block just before the freespace block. | |
1827 | */ | |
1828 | if ((error = xfs_bmap_last_before(tp, dp, &fo, XFS_DATA_FORK))) { | |
1829 | return error; | |
1830 | } | |
1831 | /* | |
1832 | * If it's not the single leaf block, give up. | |
1833 | */ | |
1834 | if (XFS_FSB_TO_B(mp, fo) > XFS_DIR2_LEAF_OFFSET + mp->m_dirblksize) | |
1835 | return 0; | |
1836 | lbp = state->path.blk[0].bp; | |
1837 | leaf = lbp->data; | |
89da0544 | 1838 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC); |
1da177e4 LT |
1839 | /* |
1840 | * Read the freespace block. | |
1841 | */ | |
1842 | if ((error = xfs_da_read_buf(tp, dp, mp->m_dirfreeblk, -1, &fbp, | |
1843 | XFS_DATA_FORK))) { | |
1844 | return error; | |
1845 | } | |
1846 | free = fbp->data; | |
0ba962ef | 1847 | ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC); |
1da177e4 LT |
1848 | ASSERT(!free->hdr.firstdb); |
1849 | /* | |
1850 | * Now see if the leafn and free data will fit in a leaf1. | |
1851 | * If not, release the buffer and give up. | |
1852 | */ | |
1853 | if ((uint)sizeof(leaf->hdr) + | |
a818e5de | 1854 | (be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale)) * (uint)sizeof(leaf->ents[0]) + |
0ba962ef | 1855 | be32_to_cpu(free->hdr.nvalid) * (uint)sizeof(leaf->bests[0]) + |
1da177e4 LT |
1856 | (uint)sizeof(leaf->tail) > |
1857 | mp->m_dirblksize) { | |
1858 | xfs_da_brelse(tp, fbp); | |
1859 | return 0; | |
1860 | } | |
1861 | /* | |
1862 | * If the leaf has any stale entries in it, compress them out. | |
1863 | * The compact routine will log the header. | |
1864 | */ | |
a818e5de | 1865 | if (be16_to_cpu(leaf->hdr.stale)) |
1da177e4 LT |
1866 | xfs_dir2_leaf_compact(args, lbp); |
1867 | else | |
1868 | xfs_dir2_leaf_log_header(tp, lbp); | |
89da0544 | 1869 | leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAF1_MAGIC); |
1da177e4 LT |
1870 | /* |
1871 | * Set up the leaf tail from the freespace block. | |
1872 | */ | |
bbaaf538 | 1873 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
0ba962ef | 1874 | ltp->bestcount = free->hdr.nvalid; |
1da177e4 LT |
1875 | /* |
1876 | * Set up the leaf bests table. | |
1877 | */ | |
bbaaf538 | 1878 | memcpy(xfs_dir2_leaf_bests_p(ltp), free->bests, |
afbcb3f9 NS |
1879 | be32_to_cpu(ltp->bestcount) * sizeof(leaf->bests[0])); |
1880 | xfs_dir2_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); | |
1da177e4 LT |
1881 | xfs_dir2_leaf_log_tail(tp, lbp); |
1882 | xfs_dir2_leaf_check(dp, lbp); | |
1883 | /* | |
1884 | * Get rid of the freespace block. | |
1885 | */ | |
1886 | error = xfs_dir2_shrink_inode(args, XFS_DIR2_FREE_FIRSTDB(mp), fbp); | |
1887 | if (error) { | |
1888 | /* | |
1889 | * This can't fail here because it can only happen when | |
1890 | * punching out the middle of an extent, and this is an | |
1891 | * isolated block. | |
1892 | */ | |
1893 | ASSERT(error != ENOSPC); | |
1894 | return error; | |
1895 | } | |
1896 | fbp = NULL; | |
1897 | /* | |
1898 | * Now see if we can convert the single-leaf directory | |
1899 | * down to a block form directory. | |
1900 | * This routine always kills the dabuf for the leaf, so | |
1901 | * eliminate it from the path. | |
1902 | */ | |
1903 | error = xfs_dir2_leaf_to_block(args, lbp, NULL); | |
1904 | state->path.blk[0].bp = NULL; | |
1905 | return error; | |
1906 | } |