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Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
f5f3d9b0 | 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" |
a4fbe6ab | 21 | #include "xfs_format.h" |
239880ef DC |
22 | #include "xfs_log_format.h" |
23 | #include "xfs_trans_resv.h" | |
1da177e4 | 24 | #include "xfs_mount.h" |
57062787 | 25 | #include "xfs_da_format.h" |
a844f451 | 26 | #include "xfs_da_btree.h" |
1da177e4 | 27 | #include "xfs_inode.h" |
239880ef | 28 | #include "xfs_trans.h" |
a844f451 | 29 | #include "xfs_inode_item.h" |
f3508bcd | 30 | #include "xfs_bmap.h" |
f5f3d9b0 | 31 | #include "xfs_buf_item.h" |
2b9ab5ab | 32 | #include "xfs_dir2.h" |
57926640 | 33 | #include "xfs_dir2_priv.h" |
1da177e4 | 34 | #include "xfs_error.h" |
0b1b213f | 35 | #include "xfs_trace.h" |
f5f3d9b0 | 36 | #include "xfs_cksum.h" |
a45086e2 | 37 | #include "xfs_log.h" |
1da177e4 LT |
38 | |
39 | /* | |
40 | * Local function prototypes. | |
41 | */ | |
1d9025e5 DC |
42 | static void xfs_dir2_block_log_leaf(xfs_trans_t *tp, struct xfs_buf *bp, |
43 | int first, int last); | |
44 | static void xfs_dir2_block_log_tail(xfs_trans_t *tp, struct xfs_buf *bp); | |
45 | static int xfs_dir2_block_lookup_int(xfs_da_args_t *args, struct xfs_buf **bpp, | |
1da177e4 LT |
46 | int *entno); |
47 | static int xfs_dir2_block_sort(const void *a, const void *b); | |
48 | ||
f6c2d1fa NS |
49 | static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot; |
50 | ||
51 | /* | |
52 | * One-time startup routine called from xfs_init(). | |
53 | */ | |
54 | void | |
55 | xfs_dir_startup(void) | |
56 | { | |
4a24cb71 DC |
57 | xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1); |
58 | xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2); | |
f6c2d1fa NS |
59 | } |
60 | ||
f5f3d9b0 DC |
61 | static bool |
62 | xfs_dir3_block_verify( | |
82025d7f DC |
63 | struct xfs_buf *bp) |
64 | { | |
65 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
f5f3d9b0 DC |
66 | struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; |
67 | ||
68 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
69 | if (hdr3->magic != cpu_to_be32(XFS_DIR3_BLOCK_MAGIC)) | |
70 | return false; | |
ce748eaa | 71 | if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) |
f5f3d9b0 DC |
72 | return false; |
73 | if (be64_to_cpu(hdr3->blkno) != bp->b_bn) | |
74 | return false; | |
a45086e2 BF |
75 | if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) |
76 | return false; | |
f5f3d9b0 DC |
77 | } else { |
78 | if (hdr3->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) | |
79 | return false; | |
82025d7f | 80 | } |
33363fee | 81 | if (__xfs_dir3_data_check(NULL, bp)) |
f5f3d9b0 DC |
82 | return false; |
83 | return true; | |
612cfbfe | 84 | } |
82025d7f | 85 | |
612cfbfe | 86 | static void |
f5f3d9b0 | 87 | xfs_dir3_block_read_verify( |
612cfbfe DC |
88 | struct xfs_buf *bp) |
89 | { | |
f5f3d9b0 DC |
90 | struct xfs_mount *mp = bp->b_target->bt_mount; |
91 | ||
ce5028cf ES |
92 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
93 | !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF)) | |
2451337d | 94 | xfs_buf_ioerror(bp, -EFSBADCRC); |
ce5028cf | 95 | else if (!xfs_dir3_block_verify(bp)) |
2451337d | 96 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf ES |
97 | |
98 | if (bp->b_error) | |
99 | xfs_verifier_error(bp); | |
612cfbfe DC |
100 | } |
101 | ||
1813dd64 | 102 | static void |
f5f3d9b0 | 103 | xfs_dir3_block_write_verify( |
612cfbfe DC |
104 | struct xfs_buf *bp) |
105 | { | |
f5f3d9b0 DC |
106 | struct xfs_mount *mp = bp->b_target->bt_mount; |
107 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
108 | struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; | |
109 | ||
110 | if (!xfs_dir3_block_verify(bp)) { | |
2451337d | 111 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf | 112 | xfs_verifier_error(bp); |
f5f3d9b0 DC |
113 | return; |
114 | } | |
115 | ||
116 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
117 | return; | |
118 | ||
119 | if (bip) | |
120 | hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
121 | ||
f1dbcd7e | 122 | xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF); |
82025d7f DC |
123 | } |
124 | ||
f5f3d9b0 DC |
125 | const struct xfs_buf_ops xfs_dir3_block_buf_ops = { |
126 | .verify_read = xfs_dir3_block_read_verify, | |
127 | .verify_write = xfs_dir3_block_write_verify, | |
1813dd64 DC |
128 | }; |
129 | ||
4a8af273 | 130 | int |
f5f3d9b0 | 131 | xfs_dir3_block_read( |
20f7e9f3 DC |
132 | struct xfs_trans *tp, |
133 | struct xfs_inode *dp, | |
134 | struct xfs_buf **bpp) | |
135 | { | |
136 | struct xfs_mount *mp = dp->i_mount; | |
d75afeb3 | 137 | int err; |
20f7e9f3 | 138 | |
7dda6e86 | 139 | err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk, -1, bpp, |
f5f3d9b0 | 140 | XFS_DATA_FORK, &xfs_dir3_block_buf_ops); |
d75afeb3 | 141 | if (!err && tp) |
61fe135c | 142 | xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF); |
d75afeb3 | 143 | return err; |
f5f3d9b0 DC |
144 | } |
145 | ||
146 | static void | |
147 | xfs_dir3_block_init( | |
148 | struct xfs_mount *mp, | |
d75afeb3 | 149 | struct xfs_trans *tp, |
f5f3d9b0 DC |
150 | struct xfs_buf *bp, |
151 | struct xfs_inode *dp) | |
152 | { | |
153 | struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; | |
154 | ||
155 | bp->b_ops = &xfs_dir3_block_buf_ops; | |
61fe135c | 156 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF); |
f5f3d9b0 DC |
157 | |
158 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
159 | memset(hdr3, 0, sizeof(*hdr3)); | |
160 | hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); | |
161 | hdr3->blkno = cpu_to_be64(bp->b_bn); | |
162 | hdr3->owner = cpu_to_be64(dp->i_ino); | |
ce748eaa | 163 | uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); |
f5f3d9b0 DC |
164 | return; |
165 | ||
166 | } | |
167 | hdr3->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC); | |
20f7e9f3 DC |
168 | } |
169 | ||
170 | static void | |
171 | xfs_dir2_block_need_space( | |
2ca98774 | 172 | struct xfs_inode *dp, |
20f7e9f3 DC |
173 | struct xfs_dir2_data_hdr *hdr, |
174 | struct xfs_dir2_block_tail *btp, | |
175 | struct xfs_dir2_leaf_entry *blp, | |
176 | __be16 **tagpp, | |
177 | struct xfs_dir2_data_unused **dupp, | |
178 | struct xfs_dir2_data_unused **enddupp, | |
179 | int *compact, | |
180 | int len) | |
181 | { | |
182 | struct xfs_dir2_data_free *bf; | |
183 | __be16 *tagp = NULL; | |
184 | struct xfs_dir2_data_unused *dup = NULL; | |
185 | struct xfs_dir2_data_unused *enddup = NULL; | |
186 | ||
187 | *compact = 0; | |
2ca98774 | 188 | bf = dp->d_ops->data_bestfree_p(hdr); |
20f7e9f3 DC |
189 | |
190 | /* | |
191 | * If there are stale entries we'll use one for the leaf. | |
192 | */ | |
193 | if (btp->stale) { | |
194 | if (be16_to_cpu(bf[0].length) >= len) { | |
195 | /* | |
196 | * The biggest entry enough to avoid compaction. | |
197 | */ | |
198 | dup = (xfs_dir2_data_unused_t *) | |
199 | ((char *)hdr + be16_to_cpu(bf[0].offset)); | |
200 | goto out; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Will need to compact to make this work. | |
205 | * Tag just before the first leaf entry. | |
206 | */ | |
207 | *compact = 1; | |
208 | tagp = (__be16 *)blp - 1; | |
209 | ||
210 | /* Data object just before the first leaf entry. */ | |
211 | dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); | |
212 | ||
213 | /* | |
214 | * If it's not free then the data will go where the | |
215 | * leaf data starts now, if it works at all. | |
216 | */ | |
217 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { | |
218 | if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) * | |
219 | (uint)sizeof(*blp) < len) | |
220 | dup = NULL; | |
221 | } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len) | |
222 | dup = NULL; | |
223 | else | |
224 | dup = (xfs_dir2_data_unused_t *)blp; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | /* | |
229 | * no stale entries, so just use free space. | |
230 | * Tag just before the first leaf entry. | |
231 | */ | |
232 | tagp = (__be16 *)blp - 1; | |
233 | ||
234 | /* Data object just before the first leaf entry. */ | |
235 | enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); | |
236 | ||
237 | /* | |
238 | * If it's not free then can't do this add without cleaning up: | |
239 | * the space before the first leaf entry needs to be free so it | |
240 | * can be expanded to hold the pointer to the new entry. | |
241 | */ | |
242 | if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) { | |
243 | /* | |
244 | * Check out the biggest freespace and see if it's the same one. | |
245 | */ | |
246 | dup = (xfs_dir2_data_unused_t *) | |
247 | ((char *)hdr + be16_to_cpu(bf[0].offset)); | |
248 | if (dup != enddup) { | |
249 | /* | |
250 | * Not the same free entry, just check its length. | |
251 | */ | |
252 | if (be16_to_cpu(dup->length) < len) | |
253 | dup = NULL; | |
254 | goto out; | |
255 | } | |
256 | ||
257 | /* | |
258 | * It is the biggest freespace, can it hold the leaf too? | |
259 | */ | |
260 | if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) { | |
261 | /* | |
262 | * Yes, use the second-largest entry instead if it works. | |
263 | */ | |
264 | if (be16_to_cpu(bf[1].length) >= len) | |
265 | dup = (xfs_dir2_data_unused_t *) | |
266 | ((char *)hdr + be16_to_cpu(bf[1].offset)); | |
267 | else | |
268 | dup = NULL; | |
269 | } | |
270 | } | |
271 | out: | |
272 | *tagpp = tagp; | |
273 | *dupp = dup; | |
274 | *enddupp = enddup; | |
275 | } | |
276 | ||
277 | /* | |
278 | * compact the leaf entries. | |
279 | * Leave the highest-numbered stale entry stale. | |
280 | * XXX should be the one closest to mid but mid is not yet computed. | |
281 | */ | |
282 | static void | |
283 | xfs_dir2_block_compact( | |
bc85178a | 284 | struct xfs_da_args *args, |
20f7e9f3 DC |
285 | struct xfs_buf *bp, |
286 | struct xfs_dir2_data_hdr *hdr, | |
287 | struct xfs_dir2_block_tail *btp, | |
288 | struct xfs_dir2_leaf_entry *blp, | |
289 | int *needlog, | |
290 | int *lfloghigh, | |
291 | int *lfloglow) | |
292 | { | |
293 | int fromidx; /* source leaf index */ | |
294 | int toidx; /* target leaf index */ | |
295 | int needscan = 0; | |
296 | int highstale; /* high stale index */ | |
297 | ||
298 | fromidx = toidx = be32_to_cpu(btp->count) - 1; | |
299 | highstale = *lfloghigh = -1; | |
300 | for (; fromidx >= 0; fromidx--) { | |
301 | if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) { | |
302 | if (highstale == -1) | |
303 | highstale = toidx; | |
304 | else { | |
305 | if (*lfloghigh == -1) | |
306 | *lfloghigh = toidx; | |
307 | continue; | |
308 | } | |
309 | } | |
310 | if (fromidx < toidx) | |
311 | blp[toidx] = blp[fromidx]; | |
312 | toidx--; | |
313 | } | |
314 | *lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1); | |
315 | *lfloghigh -= be32_to_cpu(btp->stale) - 1; | |
316 | be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1)); | |
bc85178a | 317 | xfs_dir2_data_make_free(args, bp, |
20f7e9f3 DC |
318 | (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr), |
319 | (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)), | |
320 | needlog, &needscan); | |
20f7e9f3 DC |
321 | btp->stale = cpu_to_be32(1); |
322 | /* | |
323 | * If we now need to rebuild the bestfree map, do so. | |
324 | * This needs to happen before the next call to use_free. | |
325 | */ | |
326 | if (needscan) | |
bc85178a | 327 | xfs_dir2_data_freescan(args->dp, hdr, needlog); |
20f7e9f3 DC |
328 | } |
329 | ||
1da177e4 LT |
330 | /* |
331 | * Add an entry to a block directory. | |
332 | */ | |
333 | int /* error */ | |
334 | xfs_dir2_block_addname( | |
335 | xfs_da_args_t *args) /* directory op arguments */ | |
336 | { | |
4f6ae1a4 | 337 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 | 338 | xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ |
1d9025e5 | 339 | struct xfs_buf *bp; /* buffer for block */ |
1da177e4 LT |
340 | xfs_dir2_block_tail_t *btp; /* block tail */ |
341 | int compact; /* need to compact leaf ents */ | |
342 | xfs_dir2_data_entry_t *dep; /* block data entry */ | |
343 | xfs_inode_t *dp; /* directory inode */ | |
344 | xfs_dir2_data_unused_t *dup; /* block unused entry */ | |
345 | int error; /* error return value */ | |
346 | xfs_dir2_data_unused_t *enddup=NULL; /* unused at end of data */ | |
347 | xfs_dahash_t hash; /* hash value of found entry */ | |
348 | int high; /* high index for binary srch */ | |
349 | int highstale; /* high stale index */ | |
350 | int lfloghigh=0; /* last final leaf to log */ | |
351 | int lfloglow=0; /* first final leaf to log */ | |
352 | int len; /* length of the new entry */ | |
353 | int low; /* low index for binary srch */ | |
354 | int lowstale; /* low stale index */ | |
355 | int mid=0; /* midpoint for binary srch */ | |
1da177e4 LT |
356 | int needlog; /* need to log header */ |
357 | int needscan; /* need to rescan freespace */ | |
3d693c6e | 358 | __be16 *tagp; /* pointer to tag value */ |
1da177e4 LT |
359 | xfs_trans_t *tp; /* transaction structure */ |
360 | ||
0b1b213f CH |
361 | trace_xfs_dir2_block_addname(args); |
362 | ||
1da177e4 LT |
363 | dp = args->dp; |
364 | tp = args->trans; | |
20f7e9f3 DC |
365 | |
366 | /* Read the (one and only) directory block into bp. */ | |
f5f3d9b0 | 367 | error = xfs_dir3_block_read(tp, dp, &bp); |
4bb20a83 | 368 | if (error) |
1da177e4 | 369 | return error; |
20f7e9f3 | 370 | |
9d23fc85 | 371 | len = dp->d_ops->data_entsize(args->namelen); |
20f7e9f3 | 372 | |
1da177e4 LT |
373 | /* |
374 | * Set up pointers to parts of the block. | |
375 | */ | |
20f7e9f3 | 376 | hdr = bp->b_addr; |
8f66193c | 377 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
bbaaf538 | 378 | blp = xfs_dir2_block_leaf_p(btp); |
20f7e9f3 | 379 | |
1da177e4 | 380 | /* |
20f7e9f3 DC |
381 | * Find out if we can reuse stale entries or whether we need extra |
382 | * space for entry and new leaf. | |
1da177e4 | 383 | */ |
2ca98774 | 384 | xfs_dir2_block_need_space(dp, hdr, btp, blp, &tagp, &dup, |
20f7e9f3 DC |
385 | &enddup, &compact, len); |
386 | ||
1da177e4 | 387 | /* |
20f7e9f3 | 388 | * Done everything we need for a space check now. |
1da177e4 | 389 | */ |
20f7e9f3 | 390 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) { |
1d9025e5 | 391 | xfs_trans_brelse(tp, bp); |
20f7e9f3 | 392 | if (!dup) |
2451337d | 393 | return -ENOSPC; |
20f7e9f3 DC |
394 | return 0; |
395 | } | |
396 | ||
1da177e4 LT |
397 | /* |
398 | * If we don't have space for the new entry & leaf ... | |
399 | */ | |
400 | if (!dup) { | |
20f7e9f3 DC |
401 | /* Don't have a space reservation: return no-space. */ |
402 | if (args->total == 0) | |
2451337d | 403 | return -ENOSPC; |
1da177e4 LT |
404 | /* |
405 | * Convert to the next larger format. | |
406 | * Then add the new entry in that format. | |
407 | */ | |
408 | error = xfs_dir2_block_to_leaf(args, bp); | |
1da177e4 LT |
409 | if (error) |
410 | return error; | |
411 | return xfs_dir2_leaf_addname(args); | |
412 | } | |
20f7e9f3 | 413 | |
1da177e4 | 414 | needlog = needscan = 0; |
20f7e9f3 | 415 | |
1da177e4 LT |
416 | /* |
417 | * If need to compact the leaf entries, do it now. | |
1da177e4 | 418 | */ |
37f13561 | 419 | if (compact) { |
bc85178a | 420 | xfs_dir2_block_compact(args, bp, hdr, btp, blp, &needlog, |
20f7e9f3 | 421 | &lfloghigh, &lfloglow); |
37f13561 ES |
422 | /* recalculate blp post-compaction */ |
423 | blp = xfs_dir2_block_leaf_p(btp); | |
424 | } else if (btp->stale) { | |
1da177e4 | 425 | /* |
20f7e9f3 DC |
426 | * Set leaf logging boundaries to impossible state. |
427 | * For the no-stale case they're set explicitly. | |
1da177e4 | 428 | */ |
e922fffa | 429 | lfloglow = be32_to_cpu(btp->count); |
1da177e4 LT |
430 | lfloghigh = -1; |
431 | } | |
20f7e9f3 | 432 | |
1da177e4 LT |
433 | /* |
434 | * Find the slot that's first lower than our hash value, -1 if none. | |
435 | */ | |
e922fffa | 436 | for (low = 0, high = be32_to_cpu(btp->count) - 1; low <= high; ) { |
1da177e4 | 437 | mid = (low + high) >> 1; |
3c1f9c15 | 438 | if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval) |
1da177e4 LT |
439 | break; |
440 | if (hash < args->hashval) | |
441 | low = mid + 1; | |
442 | else | |
443 | high = mid - 1; | |
444 | } | |
3c1f9c15 | 445 | while (mid >= 0 && be32_to_cpu(blp[mid].hashval) >= args->hashval) { |
1da177e4 LT |
446 | mid--; |
447 | } | |
448 | /* | |
449 | * No stale entries, will use enddup space to hold new leaf. | |
450 | */ | |
451 | if (!btp->stale) { | |
452 | /* | |
453 | * Mark the space needed for the new leaf entry, now in use. | |
454 | */ | |
bc85178a | 455 | xfs_dir2_data_use_free(args, bp, enddup, |
1da177e4 | 456 | (xfs_dir2_data_aoff_t) |
4f6ae1a4 | 457 | ((char *)enddup - (char *)hdr + be16_to_cpu(enddup->length) - |
1da177e4 LT |
458 | sizeof(*blp)), |
459 | (xfs_dir2_data_aoff_t)sizeof(*blp), | |
460 | &needlog, &needscan); | |
461 | /* | |
462 | * Update the tail (entry count). | |
463 | */ | |
413d57c9 | 464 | be32_add_cpu(&btp->count, 1); |
1da177e4 LT |
465 | /* |
466 | * If we now need to rebuild the bestfree map, do so. | |
467 | * This needs to happen before the next call to use_free. | |
468 | */ | |
469 | if (needscan) { | |
9d23fc85 | 470 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
1da177e4 LT |
471 | needscan = 0; |
472 | } | |
473 | /* | |
474 | * Adjust pointer to the first leaf entry, we're about to move | |
475 | * the table up one to open up space for the new leaf entry. | |
476 | * Then adjust our index to match. | |
477 | */ | |
478 | blp--; | |
479 | mid++; | |
480 | if (mid) | |
481 | memmove(blp, &blp[1], mid * sizeof(*blp)); | |
482 | lfloglow = 0; | |
483 | lfloghigh = mid; | |
484 | } | |
485 | /* | |
486 | * Use a stale leaf for our new entry. | |
487 | */ | |
488 | else { | |
489 | for (lowstale = mid; | |
490 | lowstale >= 0 && | |
69ef921b CH |
491 | blp[lowstale].address != |
492 | cpu_to_be32(XFS_DIR2_NULL_DATAPTR); | |
1da177e4 LT |
493 | lowstale--) |
494 | continue; | |
495 | for (highstale = mid + 1; | |
e922fffa | 496 | highstale < be32_to_cpu(btp->count) && |
69ef921b CH |
497 | blp[highstale].address != |
498 | cpu_to_be32(XFS_DIR2_NULL_DATAPTR) && | |
1da177e4 LT |
499 | (lowstale < 0 || mid - lowstale > highstale - mid); |
500 | highstale++) | |
501 | continue; | |
502 | /* | |
503 | * Move entries toward the low-numbered stale entry. | |
504 | */ | |
505 | if (lowstale >= 0 && | |
e922fffa | 506 | (highstale == be32_to_cpu(btp->count) || |
1da177e4 LT |
507 | mid - lowstale <= highstale - mid)) { |
508 | if (mid - lowstale) | |
509 | memmove(&blp[lowstale], &blp[lowstale + 1], | |
510 | (mid - lowstale) * sizeof(*blp)); | |
511 | lfloglow = MIN(lowstale, lfloglow); | |
512 | lfloghigh = MAX(mid, lfloghigh); | |
513 | } | |
514 | /* | |
515 | * Move entries toward the high-numbered stale entry. | |
516 | */ | |
517 | else { | |
e922fffa | 518 | ASSERT(highstale < be32_to_cpu(btp->count)); |
1da177e4 LT |
519 | mid++; |
520 | if (highstale - mid) | |
521 | memmove(&blp[mid + 1], &blp[mid], | |
522 | (highstale - mid) * sizeof(*blp)); | |
523 | lfloglow = MIN(mid, lfloglow); | |
524 | lfloghigh = MAX(highstale, lfloghigh); | |
525 | } | |
413d57c9 | 526 | be32_add_cpu(&btp->stale, -1); |
1da177e4 LT |
527 | } |
528 | /* | |
529 | * Point to the new data entry. | |
530 | */ | |
531 | dep = (xfs_dir2_data_entry_t *)dup; | |
532 | /* | |
533 | * Fill in the leaf entry. | |
534 | */ | |
3c1f9c15 | 535 | blp[mid].hashval = cpu_to_be32(args->hashval); |
25994053 | 536 | blp[mid].address = cpu_to_be32(xfs_dir2_byte_to_dataptr( |
4f6ae1a4 | 537 | (char *)dep - (char *)hdr)); |
1da177e4 LT |
538 | xfs_dir2_block_log_leaf(tp, bp, lfloglow, lfloghigh); |
539 | /* | |
540 | * Mark space for the data entry used. | |
541 | */ | |
bc85178a | 542 | xfs_dir2_data_use_free(args, bp, dup, |
4f6ae1a4 | 543 | (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), |
1da177e4 LT |
544 | (xfs_dir2_data_aoff_t)len, &needlog, &needscan); |
545 | /* | |
546 | * Create the new data entry. | |
547 | */ | |
ff9901c1 | 548 | dep->inumber = cpu_to_be64(args->inumber); |
1da177e4 LT |
549 | dep->namelen = args->namelen; |
550 | memcpy(dep->name, args->name, args->namelen); | |
9d23fc85 DC |
551 | dp->d_ops->data_put_ftype(dep, args->filetype); |
552 | tagp = dp->d_ops->data_entry_tag_p(dep); | |
4f6ae1a4 | 553 | *tagp = cpu_to_be16((char *)dep - (char *)hdr); |
1da177e4 LT |
554 | /* |
555 | * Clean up the bestfree array and log the header, tail, and entry. | |
556 | */ | |
557 | if (needscan) | |
9d23fc85 | 558 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
1da177e4 | 559 | if (needlog) |
bc85178a | 560 | xfs_dir2_data_log_header(args, bp); |
1da177e4 | 561 | xfs_dir2_block_log_tail(tp, bp); |
bc85178a | 562 | xfs_dir2_data_log_entry(args, bp, dep); |
33363fee | 563 | xfs_dir3_data_check(dp, bp); |
1da177e4 LT |
564 | return 0; |
565 | } | |
566 | ||
1da177e4 LT |
567 | /* |
568 | * Log leaf entries from the block. | |
569 | */ | |
570 | static void | |
571 | xfs_dir2_block_log_leaf( | |
572 | xfs_trans_t *tp, /* transaction structure */ | |
1d9025e5 | 573 | struct xfs_buf *bp, /* block buffer */ |
1da177e4 LT |
574 | int first, /* index of first logged leaf */ |
575 | int last) /* index of last logged leaf */ | |
576 | { | |
1d9025e5 | 577 | xfs_dir2_data_hdr_t *hdr = bp->b_addr; |
4f6ae1a4 CH |
578 | xfs_dir2_leaf_entry_t *blp; |
579 | xfs_dir2_block_tail_t *btp; | |
1da177e4 | 580 | |
8f66193c | 581 | btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr); |
bbaaf538 | 582 | blp = xfs_dir2_block_leaf_p(btp); |
1d9025e5 | 583 | xfs_trans_log_buf(tp, bp, (uint)((char *)&blp[first] - (char *)hdr), |
4f6ae1a4 | 584 | (uint)((char *)&blp[last + 1] - (char *)hdr - 1)); |
1da177e4 LT |
585 | } |
586 | ||
587 | /* | |
588 | * Log the block tail. | |
589 | */ | |
590 | static void | |
591 | xfs_dir2_block_log_tail( | |
592 | xfs_trans_t *tp, /* transaction structure */ | |
1d9025e5 | 593 | struct xfs_buf *bp) /* block buffer */ |
1da177e4 | 594 | { |
1d9025e5 | 595 | xfs_dir2_data_hdr_t *hdr = bp->b_addr; |
4f6ae1a4 | 596 | xfs_dir2_block_tail_t *btp; |
1da177e4 | 597 | |
8f66193c | 598 | btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr); |
1d9025e5 | 599 | xfs_trans_log_buf(tp, bp, (uint)((char *)btp - (char *)hdr), |
4f6ae1a4 | 600 | (uint)((char *)(btp + 1) - (char *)hdr - 1)); |
1da177e4 LT |
601 | } |
602 | ||
603 | /* | |
604 | * Look up an entry in the block. This is the external routine, | |
605 | * xfs_dir2_block_lookup_int does the real work. | |
606 | */ | |
607 | int /* error */ | |
608 | xfs_dir2_block_lookup( | |
609 | xfs_da_args_t *args) /* dir lookup arguments */ | |
610 | { | |
4f6ae1a4 | 611 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 | 612 | xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ |
1d9025e5 | 613 | struct xfs_buf *bp; /* block buffer */ |
1da177e4 LT |
614 | xfs_dir2_block_tail_t *btp; /* block tail */ |
615 | xfs_dir2_data_entry_t *dep; /* block data entry */ | |
616 | xfs_inode_t *dp; /* incore inode */ | |
617 | int ent; /* entry index */ | |
618 | int error; /* error return value */ | |
1da177e4 | 619 | |
0b1b213f CH |
620 | trace_xfs_dir2_block_lookup(args); |
621 | ||
1da177e4 LT |
622 | /* |
623 | * Get the buffer, look up the entry. | |
624 | * If not found (ENOENT) then return, have no buffer. | |
625 | */ | |
626 | if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) | |
627 | return error; | |
628 | dp = args->dp; | |
1d9025e5 | 629 | hdr = bp->b_addr; |
33363fee | 630 | xfs_dir3_data_check(dp, bp); |
8f66193c | 631 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
bbaaf538 | 632 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
633 | /* |
634 | * Get the offset from the leaf entry, to point to the data. | |
635 | */ | |
4f6ae1a4 | 636 | dep = (xfs_dir2_data_entry_t *)((char *)hdr + |
30028030 DC |
637 | xfs_dir2_dataptr_to_off(args->geo, |
638 | be32_to_cpu(blp[ent].address))); | |
1da177e4 | 639 | /* |
384f3ced | 640 | * Fill in inode number, CI name if appropriate, release the block. |
1da177e4 | 641 | */ |
ff9901c1 | 642 | args->inumber = be64_to_cpu(dep->inumber); |
9d23fc85 | 643 | args->filetype = dp->d_ops->data_get_ftype(dep); |
384f3ced | 644 | error = xfs_dir_cilookup_result(args, dep->name, dep->namelen); |
1d9025e5 | 645 | xfs_trans_brelse(args->trans, bp); |
b474c7ae | 646 | return error; |
1da177e4 LT |
647 | } |
648 | ||
649 | /* | |
650 | * Internal block lookup routine. | |
651 | */ | |
652 | static int /* error */ | |
653 | xfs_dir2_block_lookup_int( | |
654 | xfs_da_args_t *args, /* dir lookup arguments */ | |
1d9025e5 | 655 | struct xfs_buf **bpp, /* returned block buffer */ |
1da177e4 LT |
656 | int *entno) /* returned entry number */ |
657 | { | |
658 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
4f6ae1a4 | 659 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 | 660 | xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ |
1d9025e5 | 661 | struct xfs_buf *bp; /* block buffer */ |
1da177e4 LT |
662 | xfs_dir2_block_tail_t *btp; /* block tail */ |
663 | xfs_dir2_data_entry_t *dep; /* block data entry */ | |
664 | xfs_inode_t *dp; /* incore inode */ | |
665 | int error; /* error return value */ | |
666 | xfs_dahash_t hash; /* found hash value */ | |
667 | int high; /* binary search high index */ | |
668 | int low; /* binary search low index */ | |
669 | int mid; /* binary search current idx */ | |
670 | xfs_mount_t *mp; /* filesystem mount point */ | |
671 | xfs_trans_t *tp; /* transaction pointer */ | |
5163f95a | 672 | enum xfs_dacmp cmp; /* comparison result */ |
1da177e4 LT |
673 | |
674 | dp = args->dp; | |
675 | tp = args->trans; | |
676 | mp = dp->i_mount; | |
20f7e9f3 | 677 | |
f5f3d9b0 | 678 | error = xfs_dir3_block_read(tp, dp, &bp); |
4bb20a83 | 679 | if (error) |
1da177e4 | 680 | return error; |
20f7e9f3 | 681 | |
1d9025e5 | 682 | hdr = bp->b_addr; |
33363fee | 683 | xfs_dir3_data_check(dp, bp); |
8f66193c | 684 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
bbaaf538 | 685 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
686 | /* |
687 | * Loop doing a binary search for our hash value. | |
688 | * Find our entry, ENOENT if it's not there. | |
689 | */ | |
e922fffa | 690 | for (low = 0, high = be32_to_cpu(btp->count) - 1; ; ) { |
1da177e4 LT |
691 | ASSERT(low <= high); |
692 | mid = (low + high) >> 1; | |
3c1f9c15 | 693 | if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval) |
1da177e4 LT |
694 | break; |
695 | if (hash < args->hashval) | |
696 | low = mid + 1; | |
697 | else | |
698 | high = mid - 1; | |
699 | if (low > high) { | |
6a178100 | 700 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1d9025e5 | 701 | xfs_trans_brelse(tp, bp); |
2451337d | 702 | return -ENOENT; |
1da177e4 LT |
703 | } |
704 | } | |
705 | /* | |
706 | * Back up to the first one with the right hash value. | |
707 | */ | |
3c1f9c15 | 708 | while (mid > 0 && be32_to_cpu(blp[mid - 1].hashval) == args->hashval) { |
1da177e4 LT |
709 | mid--; |
710 | } | |
711 | /* | |
712 | * Now loop forward through all the entries with the | |
713 | * right hash value looking for our name. | |
714 | */ | |
715 | do { | |
3c1f9c15 | 716 | if ((addr = be32_to_cpu(blp[mid].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
717 | continue; |
718 | /* | |
719 | * Get pointer to the entry from the leaf. | |
720 | */ | |
721 | dep = (xfs_dir2_data_entry_t *) | |
30028030 | 722 | ((char *)hdr + xfs_dir2_dataptr_to_off(args->geo, addr)); |
1da177e4 | 723 | /* |
5163f95a BN |
724 | * Compare name and if it's an exact match, return the index |
725 | * and buffer. If it's the first case-insensitive match, store | |
726 | * the index and buffer and continue looking for an exact match. | |
1da177e4 | 727 | */ |
5163f95a BN |
728 | cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen); |
729 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
730 | args->cmpresult = cmp; | |
1da177e4 LT |
731 | *bpp = bp; |
732 | *entno = mid; | |
5163f95a BN |
733 | if (cmp == XFS_CMP_EXACT) |
734 | return 0; | |
1da177e4 | 735 | } |
5163f95a BN |
736 | } while (++mid < be32_to_cpu(btp->count) && |
737 | be32_to_cpu(blp[mid].hashval) == hash); | |
738 | ||
6a178100 | 739 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
740 | /* |
741 | * Here, we can only be doing a lookup (not a rename or replace). | |
742 | * If a case-insensitive match was found earlier, return success. | |
743 | */ | |
744 | if (args->cmpresult == XFS_CMP_CASE) | |
745 | return 0; | |
1da177e4 LT |
746 | /* |
747 | * No match, release the buffer and return ENOENT. | |
748 | */ | |
1d9025e5 | 749 | xfs_trans_brelse(tp, bp); |
2451337d | 750 | return -ENOENT; |
1da177e4 LT |
751 | } |
752 | ||
753 | /* | |
754 | * Remove an entry from a block format directory. | |
755 | * If that makes the block small enough to fit in shortform, transform it. | |
756 | */ | |
757 | int /* error */ | |
758 | xfs_dir2_block_removename( | |
759 | xfs_da_args_t *args) /* directory operation args */ | |
760 | { | |
4f6ae1a4 | 761 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 | 762 | xfs_dir2_leaf_entry_t *blp; /* block leaf pointer */ |
1d9025e5 | 763 | struct xfs_buf *bp; /* block buffer */ |
1da177e4 LT |
764 | xfs_dir2_block_tail_t *btp; /* block tail */ |
765 | xfs_dir2_data_entry_t *dep; /* block data entry */ | |
766 | xfs_inode_t *dp; /* incore inode */ | |
767 | int ent; /* block leaf entry index */ | |
768 | int error; /* error return value */ | |
1da177e4 LT |
769 | int needlog; /* need to log block header */ |
770 | int needscan; /* need to fixup bestfree */ | |
771 | xfs_dir2_sf_hdr_t sfh; /* shortform header */ | |
772 | int size; /* shortform size */ | |
773 | xfs_trans_t *tp; /* transaction pointer */ | |
774 | ||
0b1b213f CH |
775 | trace_xfs_dir2_block_removename(args); |
776 | ||
1da177e4 LT |
777 | /* |
778 | * Look up the entry in the block. Gets the buffer and entry index. | |
779 | * It will always be there, the vnodeops level does a lookup first. | |
780 | */ | |
781 | if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) { | |
782 | return error; | |
783 | } | |
784 | dp = args->dp; | |
785 | tp = args->trans; | |
1d9025e5 | 786 | hdr = bp->b_addr; |
8f66193c | 787 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
bbaaf538 | 788 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
789 | /* |
790 | * Point to the data entry using the leaf entry. | |
791 | */ | |
30028030 DC |
792 | dep = (xfs_dir2_data_entry_t *)((char *)hdr + |
793 | xfs_dir2_dataptr_to_off(args->geo, | |
794 | be32_to_cpu(blp[ent].address))); | |
1da177e4 LT |
795 | /* |
796 | * Mark the data entry's space free. | |
797 | */ | |
798 | needlog = needscan = 0; | |
bc85178a | 799 | xfs_dir2_data_make_free(args, bp, |
4f6ae1a4 | 800 | (xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr), |
9d23fc85 | 801 | dp->d_ops->data_entsize(dep->namelen), &needlog, &needscan); |
1da177e4 LT |
802 | /* |
803 | * Fix up the block tail. | |
804 | */ | |
413d57c9 | 805 | be32_add_cpu(&btp->stale, 1); |
1da177e4 LT |
806 | xfs_dir2_block_log_tail(tp, bp); |
807 | /* | |
808 | * Remove the leaf entry by marking it stale. | |
809 | */ | |
3c1f9c15 | 810 | blp[ent].address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR); |
1da177e4 LT |
811 | xfs_dir2_block_log_leaf(tp, bp, ent, ent); |
812 | /* | |
813 | * Fix up bestfree, log the header if necessary. | |
814 | */ | |
815 | if (needscan) | |
9d23fc85 | 816 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
1da177e4 | 817 | if (needlog) |
bc85178a | 818 | xfs_dir2_data_log_header(args, bp); |
33363fee | 819 | xfs_dir3_data_check(dp, bp); |
1da177e4 LT |
820 | /* |
821 | * See if the size as a shortform is good enough. | |
822 | */ | |
4f6ae1a4 | 823 | size = xfs_dir2_block_sfsize(dp, hdr, &sfh); |
1d9025e5 | 824 | if (size > XFS_IFORK_DSIZE(dp)) |
1da177e4 | 825 | return 0; |
1d9025e5 | 826 | |
1da177e4 LT |
827 | /* |
828 | * If it works, do the conversion. | |
829 | */ | |
830 | return xfs_dir2_block_to_sf(args, bp, size, &sfh); | |
831 | } | |
832 | ||
833 | /* | |
834 | * Replace an entry in a V2 block directory. | |
835 | * Change the inode number to the new value. | |
836 | */ | |
837 | int /* error */ | |
838 | xfs_dir2_block_replace( | |
839 | xfs_da_args_t *args) /* directory operation args */ | |
840 | { | |
4f6ae1a4 | 841 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 | 842 | xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ |
1d9025e5 | 843 | struct xfs_buf *bp; /* block buffer */ |
1da177e4 LT |
844 | xfs_dir2_block_tail_t *btp; /* block tail */ |
845 | xfs_dir2_data_entry_t *dep; /* block data entry */ | |
846 | xfs_inode_t *dp; /* incore inode */ | |
847 | int ent; /* leaf entry index */ | |
848 | int error; /* error return value */ | |
1da177e4 | 849 | |
0b1b213f CH |
850 | trace_xfs_dir2_block_replace(args); |
851 | ||
1da177e4 LT |
852 | /* |
853 | * Lookup the entry in the directory. Get buffer and entry index. | |
854 | * This will always succeed since the caller has already done a lookup. | |
855 | */ | |
856 | if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) { | |
857 | return error; | |
858 | } | |
859 | dp = args->dp; | |
1d9025e5 | 860 | hdr = bp->b_addr; |
8f66193c | 861 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
bbaaf538 | 862 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
863 | /* |
864 | * Point to the data entry we need to change. | |
865 | */ | |
30028030 DC |
866 | dep = (xfs_dir2_data_entry_t *)((char *)hdr + |
867 | xfs_dir2_dataptr_to_off(args->geo, | |
868 | be32_to_cpu(blp[ent].address))); | |
ff9901c1 | 869 | ASSERT(be64_to_cpu(dep->inumber) != args->inumber); |
1da177e4 LT |
870 | /* |
871 | * Change the inode number to the new value. | |
872 | */ | |
ff9901c1 | 873 | dep->inumber = cpu_to_be64(args->inumber); |
9d23fc85 | 874 | dp->d_ops->data_put_ftype(dep, args->filetype); |
bc85178a | 875 | xfs_dir2_data_log_entry(args, bp, dep); |
33363fee | 876 | xfs_dir3_data_check(dp, bp); |
1da177e4 LT |
877 | return 0; |
878 | } | |
879 | ||
880 | /* | |
881 | * Qsort comparison routine for the block leaf entries. | |
882 | */ | |
883 | static int /* sort order */ | |
884 | xfs_dir2_block_sort( | |
885 | const void *a, /* first leaf entry */ | |
886 | const void *b) /* second leaf entry */ | |
887 | { | |
888 | const xfs_dir2_leaf_entry_t *la; /* first leaf entry */ | |
889 | const xfs_dir2_leaf_entry_t *lb; /* second leaf entry */ | |
890 | ||
891 | la = a; | |
892 | lb = b; | |
3c1f9c15 NS |
893 | return be32_to_cpu(la->hashval) < be32_to_cpu(lb->hashval) ? -1 : |
894 | (be32_to_cpu(la->hashval) > be32_to_cpu(lb->hashval) ? 1 : 0); | |
1da177e4 LT |
895 | } |
896 | ||
897 | /* | |
898 | * Convert a V2 leaf directory to a V2 block directory if possible. | |
899 | */ | |
900 | int /* error */ | |
901 | xfs_dir2_leaf_to_block( | |
902 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 DC |
903 | struct xfs_buf *lbp, /* leaf buffer */ |
904 | struct xfs_buf *dbp) /* data buffer */ | |
1da177e4 | 905 | { |
68b3a102 | 906 | __be16 *bestsp; /* leaf bests table */ |
4f6ae1a4 | 907 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
908 | xfs_dir2_block_tail_t *btp; /* block tail */ |
909 | xfs_inode_t *dp; /* incore directory inode */ | |
910 | xfs_dir2_data_unused_t *dup; /* unused data entry */ | |
911 | int error; /* error return value */ | |
912 | int from; /* leaf from index */ | |
913 | xfs_dir2_leaf_t *leaf; /* leaf structure */ | |
914 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ | |
915 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ | |
916 | xfs_mount_t *mp; /* file system mount point */ | |
917 | int needlog; /* need to log data header */ | |
918 | int needscan; /* need to scan for bestfree */ | |
919 | xfs_dir2_sf_hdr_t sfh; /* shortform header */ | |
920 | int size; /* bytes used */ | |
3d693c6e | 921 | __be16 *tagp; /* end of entry (tag) */ |
1da177e4 LT |
922 | int to; /* block/leaf to index */ |
923 | xfs_trans_t *tp; /* transaction pointer */ | |
24df33b4 DC |
924 | struct xfs_dir2_leaf_entry *ents; |
925 | struct xfs_dir3_icleaf_hdr leafhdr; | |
1da177e4 | 926 | |
0b1b213f CH |
927 | trace_xfs_dir2_leaf_to_block(args); |
928 | ||
1da177e4 LT |
929 | dp = args->dp; |
930 | tp = args->trans; | |
931 | mp = dp->i_mount; | |
1d9025e5 | 932 | leaf = lbp->b_addr; |
01ba43b8 | 933 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
4141956a | 934 | ents = dp->d_ops->leaf_ents_p(leaf); |
8f66193c | 935 | ltp = xfs_dir2_leaf_tail_p(args->geo, leaf); |
24df33b4 DC |
936 | |
937 | ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC || | |
938 | leafhdr.magic == XFS_DIR3_LEAF1_MAGIC); | |
1da177e4 LT |
939 | /* |
940 | * If there are data blocks other than the first one, take this | |
941 | * opportunity to remove trailing empty data blocks that may have | |
942 | * been left behind during no-space-reservation operations. | |
943 | * These will show up in the leaf bests table. | |
944 | */ | |
8f66193c | 945 | while (dp->i_d.di_size > args->geo->blksize) { |
f5f3d9b0 DC |
946 | int hdrsz; |
947 | ||
1c9a5b2e | 948 | hdrsz = dp->d_ops->data_entry_offset; |
bbaaf538 | 949 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
afbcb3f9 | 950 | if (be16_to_cpu(bestsp[be32_to_cpu(ltp->bestcount) - 1]) == |
8f66193c | 951 | args->geo->blksize - hdrsz) { |
1da177e4 LT |
952 | if ((error = |
953 | xfs_dir2_leaf_trim_data(args, lbp, | |
afbcb3f9 | 954 | (xfs_dir2_db_t)(be32_to_cpu(ltp->bestcount) - 1)))) |
1d9025e5 DC |
955 | return error; |
956 | } else | |
957 | return 0; | |
1da177e4 LT |
958 | } |
959 | /* | |
960 | * Read the data block if we don't already have it, give up if it fails. | |
961 | */ | |
4bb20a83 | 962 | if (!dbp) { |
7dda6e86 | 963 | error = xfs_dir3_data_read(tp, dp, args->geo->datablk, -1, &dbp); |
4bb20a83 DC |
964 | if (error) |
965 | return error; | |
1da177e4 | 966 | } |
1d9025e5 | 967 | hdr = dbp->b_addr; |
33363fee DC |
968 | ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) || |
969 | hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC)); | |
970 | ||
1da177e4 LT |
971 | /* |
972 | * Size of the "leaf" area in the block. | |
973 | */ | |
4f6ae1a4 | 974 | size = (uint)sizeof(xfs_dir2_block_tail_t) + |
24df33b4 | 975 | (uint)sizeof(*lep) * (leafhdr.count - leafhdr.stale); |
1da177e4 LT |
976 | /* |
977 | * Look at the last data entry. | |
978 | */ | |
8f66193c | 979 | tagp = (__be16 *)((char *)hdr + args->geo->blksize) - 1; |
4f6ae1a4 | 980 | dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); |
1da177e4 LT |
981 | /* |
982 | * If it's not free or is too short we can't do it. | |
983 | */ | |
ad354eb3 | 984 | if (be16_to_cpu(dup->freetag) != XFS_DIR2_DATA_FREE_TAG || |
1d9025e5 DC |
985 | be16_to_cpu(dup->length) < size) |
986 | return 0; | |
987 | ||
1da177e4 LT |
988 | /* |
989 | * Start converting it to block form. | |
990 | */ | |
d75afeb3 | 991 | xfs_dir3_block_init(mp, tp, dbp, dp); |
f5f3d9b0 | 992 | |
1da177e4 LT |
993 | needlog = 1; |
994 | needscan = 0; | |
995 | /* | |
996 | * Use up the space at the end of the block (blp/btp). | |
997 | */ | |
bc85178a | 998 | xfs_dir2_data_use_free(args, dbp, dup, args->geo->blksize - size, size, |
1da177e4 LT |
999 | &needlog, &needscan); |
1000 | /* | |
1001 | * Initialize the block tail. | |
1002 | */ | |
8f66193c | 1003 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
24df33b4 | 1004 | btp->count = cpu_to_be32(leafhdr.count - leafhdr.stale); |
1da177e4 LT |
1005 | btp->stale = 0; |
1006 | xfs_dir2_block_log_tail(tp, dbp); | |
1007 | /* | |
1008 | * Initialize the block leaf area. We compact out stale entries. | |
1009 | */ | |
bbaaf538 | 1010 | lep = xfs_dir2_block_leaf_p(btp); |
24df33b4 DC |
1011 | for (from = to = 0; from < leafhdr.count; from++) { |
1012 | if (ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) | |
1da177e4 | 1013 | continue; |
24df33b4 | 1014 | lep[to++] = ents[from]; |
1da177e4 | 1015 | } |
e922fffa NS |
1016 | ASSERT(to == be32_to_cpu(btp->count)); |
1017 | xfs_dir2_block_log_leaf(tp, dbp, 0, be32_to_cpu(btp->count) - 1); | |
1da177e4 LT |
1018 | /* |
1019 | * Scan the bestfree if we need it and log the data block header. | |
1020 | */ | |
1021 | if (needscan) | |
9d23fc85 | 1022 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
1da177e4 | 1023 | if (needlog) |
bc85178a | 1024 | xfs_dir2_data_log_header(args, dbp); |
1da177e4 LT |
1025 | /* |
1026 | * Pitch the old leaf block. | |
1027 | */ | |
7dda6e86 | 1028 | error = xfs_da_shrink_inode(args, args->geo->leafblk, lbp); |
1d9025e5 DC |
1029 | if (error) |
1030 | return error; | |
1031 | ||
1da177e4 LT |
1032 | /* |
1033 | * Now see if the resulting block can be shrunken to shortform. | |
1034 | */ | |
4f6ae1a4 | 1035 | size = xfs_dir2_block_sfsize(dp, hdr, &sfh); |
1d9025e5 DC |
1036 | if (size > XFS_IFORK_DSIZE(dp)) |
1037 | return 0; | |
1038 | ||
1da177e4 | 1039 | return xfs_dir2_block_to_sf(args, dbp, size, &sfh); |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | /* | |
1043 | * Convert the shortform directory to block form. | |
1044 | */ | |
1045 | int /* error */ | |
1046 | xfs_dir2_sf_to_block( | |
1047 | xfs_da_args_t *args) /* operation arguments */ | |
1048 | { | |
1049 | xfs_dir2_db_t blkno; /* dir-relative block # (0) */ | |
4f6ae1a4 | 1050 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 | 1051 | xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ |
1d9025e5 | 1052 | struct xfs_buf *bp; /* block buffer */ |
1da177e4 | 1053 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
1da177e4 LT |
1054 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ |
1055 | xfs_inode_t *dp; /* incore directory inode */ | |
1056 | int dummy; /* trash */ | |
1057 | xfs_dir2_data_unused_t *dup; /* unused entry pointer */ | |
1058 | int endoffset; /* end of data objects */ | |
1059 | int error; /* error return value */ | |
1060 | int i; /* index */ | |
1061 | xfs_mount_t *mp; /* filesystem mount point */ | |
1062 | int needlog; /* need to log block header */ | |
1063 | int needscan; /* need to scan block freespc */ | |
1064 | int newoffset; /* offset from current entry */ | |
1065 | int offset; /* target block offset */ | |
1066 | xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */ | |
ac8ba50f CH |
1067 | xfs_dir2_sf_hdr_t *oldsfp; /* old shortform header */ |
1068 | xfs_dir2_sf_hdr_t *sfp; /* shortform header */ | |
3d693c6e | 1069 | __be16 *tagp; /* end of data entry */ |
1da177e4 | 1070 | xfs_trans_t *tp; /* transaction pointer */ |
5163f95a | 1071 | struct xfs_name name; |
f3508bcd | 1072 | struct xfs_ifork *ifp; |
1da177e4 | 1073 | |
0b1b213f CH |
1074 | trace_xfs_dir2_sf_to_block(args); |
1075 | ||
1da177e4 LT |
1076 | dp = args->dp; |
1077 | tp = args->trans; | |
1078 | mp = dp->i_mount; | |
f3508bcd DC |
1079 | ifp = XFS_IFORK_PTR(dp, XFS_DATA_FORK); |
1080 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
1da177e4 LT |
1081 | /* |
1082 | * Bomb out if the shortform directory is way too short. | |
1083 | */ | |
1084 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
1085 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
2451337d | 1086 | return -EIO; |
1da177e4 | 1087 | } |
ac8ba50f | 1088 | |
f3508bcd | 1089 | oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data; |
ac8ba50f | 1090 | |
f3508bcd DC |
1091 | ASSERT(ifp->if_bytes == dp->i_d.di_size); |
1092 | ASSERT(ifp->if_u1.if_data != NULL); | |
ac8ba50f | 1093 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count)); |
f3508bcd | 1094 | ASSERT(dp->i_d.di_nextents == 0); |
ac8ba50f | 1095 | |
1da177e4 | 1096 | /* |
ac8ba50f | 1097 | * Copy the directory into a temporary buffer. |
1da177e4 LT |
1098 | * Then pitch the incore inode data so we can make extents. |
1099 | */ | |
f3508bcd DC |
1100 | sfp = kmem_alloc(ifp->if_bytes, KM_SLEEP); |
1101 | memcpy(sfp, oldsfp, ifp->if_bytes); | |
1da177e4 | 1102 | |
f3508bcd DC |
1103 | xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK); |
1104 | xfs_bmap_local_to_extents_empty(dp, XFS_DATA_FORK); | |
1da177e4 | 1105 | dp->i_d.di_size = 0; |
ac8ba50f | 1106 | |
1da177e4 LT |
1107 | /* |
1108 | * Add block 0 to the inode. | |
1109 | */ | |
1110 | error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno); | |
1111 | if (error) { | |
ac8ba50f | 1112 | kmem_free(sfp); |
1da177e4 LT |
1113 | return error; |
1114 | } | |
1115 | /* | |
f5f3d9b0 | 1116 | * Initialize the data block, then convert it to block format. |
1da177e4 | 1117 | */ |
f5f3d9b0 | 1118 | error = xfs_dir3_data_init(args, blkno, &bp); |
1da177e4 | 1119 | if (error) { |
ac8ba50f | 1120 | kmem_free(sfp); |
1da177e4 LT |
1121 | return error; |
1122 | } | |
d75afeb3 | 1123 | xfs_dir3_block_init(mp, tp, bp, dp); |
1d9025e5 | 1124 | hdr = bp->b_addr; |
f5f3d9b0 | 1125 | |
1da177e4 LT |
1126 | /* |
1127 | * Compute size of block "tail" area. | |
1128 | */ | |
1129 | i = (uint)sizeof(*btp) + | |
ac8ba50f | 1130 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t); |
1da177e4 LT |
1131 | /* |
1132 | * The whole thing is initialized to free by the init routine. | |
1133 | * Say we're using the leaf and tail area. | |
1134 | */ | |
2ca98774 | 1135 | dup = dp->d_ops->data_unused_p(hdr); |
1da177e4 | 1136 | needlog = needscan = 0; |
bc85178a | 1137 | xfs_dir2_data_use_free(args, bp, dup, args->geo->blksize - i, |
8f66193c | 1138 | i, &needlog, &needscan); |
1da177e4 LT |
1139 | ASSERT(needscan == 0); |
1140 | /* | |
1141 | * Fill in the tail. | |
1142 | */ | |
8f66193c | 1143 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
ac8ba50f | 1144 | btp->count = cpu_to_be32(sfp->count + 2); /* ., .. */ |
1da177e4 | 1145 | btp->stale = 0; |
bbaaf538 | 1146 | blp = xfs_dir2_block_leaf_p(btp); |
4f6ae1a4 | 1147 | endoffset = (uint)((char *)blp - (char *)hdr); |
1da177e4 LT |
1148 | /* |
1149 | * Remove the freespace, we'll manage it. | |
1150 | */ | |
bc85178a | 1151 | xfs_dir2_data_use_free(args, bp, dup, |
4f6ae1a4 | 1152 | (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), |
ad354eb3 | 1153 | be16_to_cpu(dup->length), &needlog, &needscan); |
1da177e4 LT |
1154 | /* |
1155 | * Create entry for . | |
1156 | */ | |
9d23fc85 | 1157 | dep = dp->d_ops->data_dot_entry_p(hdr); |
ff9901c1 | 1158 | dep->inumber = cpu_to_be64(dp->i_ino); |
1da177e4 LT |
1159 | dep->namelen = 1; |
1160 | dep->name[0] = '.'; | |
9d23fc85 DC |
1161 | dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR); |
1162 | tagp = dp->d_ops->data_entry_tag_p(dep); | |
4f6ae1a4 | 1163 | *tagp = cpu_to_be16((char *)dep - (char *)hdr); |
bc85178a | 1164 | xfs_dir2_data_log_entry(args, bp, dep); |
3c1f9c15 | 1165 | blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot); |
25994053 | 1166 | blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr( |
4f6ae1a4 | 1167 | (char *)dep - (char *)hdr)); |
1da177e4 LT |
1168 | /* |
1169 | * Create entry for .. | |
1170 | */ | |
9d23fc85 | 1171 | dep = dp->d_ops->data_dotdot_entry_p(hdr); |
4740175e | 1172 | dep->inumber = cpu_to_be64(dp->d_ops->sf_get_parent_ino(sfp)); |
1da177e4 LT |
1173 | dep->namelen = 2; |
1174 | dep->name[0] = dep->name[1] = '.'; | |
9d23fc85 DC |
1175 | dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR); |
1176 | tagp = dp->d_ops->data_entry_tag_p(dep); | |
4f6ae1a4 | 1177 | *tagp = cpu_to_be16((char *)dep - (char *)hdr); |
bc85178a | 1178 | xfs_dir2_data_log_entry(args, bp, dep); |
3c1f9c15 | 1179 | blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot); |
25994053 | 1180 | blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr( |
4f6ae1a4 | 1181 | (char *)dep - (char *)hdr)); |
1c9a5b2e | 1182 | offset = dp->d_ops->data_first_offset; |
1da177e4 LT |
1183 | /* |
1184 | * Loop over existing entries, stuff them in. | |
1185 | */ | |
ac8ba50f CH |
1186 | i = 0; |
1187 | if (!sfp->count) | |
1da177e4 LT |
1188 | sfep = NULL; |
1189 | else | |
bbaaf538 | 1190 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
1191 | /* |
1192 | * Need to preserve the existing offset values in the sf directory. | |
1193 | * Insert holes (unused entries) where necessary. | |
1194 | */ | |
1195 | while (offset < endoffset) { | |
1196 | /* | |
1197 | * sfep is null when we reach the end of the list. | |
1198 | */ | |
1199 | if (sfep == NULL) | |
1200 | newoffset = endoffset; | |
1201 | else | |
bbaaf538 | 1202 | newoffset = xfs_dir2_sf_get_offset(sfep); |
1da177e4 LT |
1203 | /* |
1204 | * There should be a hole here, make one. | |
1205 | */ | |
1206 | if (offset < newoffset) { | |
4f6ae1a4 | 1207 | dup = (xfs_dir2_data_unused_t *)((char *)hdr + offset); |
ad354eb3 NS |
1208 | dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG); |
1209 | dup->length = cpu_to_be16(newoffset - offset); | |
bbaaf538 | 1210 | *xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16( |
4f6ae1a4 | 1211 | ((char *)dup - (char *)hdr)); |
bc85178a | 1212 | xfs_dir2_data_log_unused(args, bp, dup); |
2ca98774 DC |
1213 | xfs_dir2_data_freeinsert(hdr, |
1214 | dp->d_ops->data_bestfree_p(hdr), | |
1215 | dup, &dummy); | |
ad354eb3 | 1216 | offset += be16_to_cpu(dup->length); |
1da177e4 LT |
1217 | continue; |
1218 | } | |
1219 | /* | |
1220 | * Copy a real entry. | |
1221 | */ | |
4f6ae1a4 | 1222 | dep = (xfs_dir2_data_entry_t *)((char *)hdr + newoffset); |
4740175e | 1223 | dep->inumber = cpu_to_be64(dp->d_ops->sf_get_ino(sfp, sfep)); |
1da177e4 | 1224 | dep->namelen = sfep->namelen; |
9d23fc85 | 1225 | dp->d_ops->data_put_ftype(dep, dp->d_ops->sf_get_ftype(sfep)); |
1da177e4 | 1226 | memcpy(dep->name, sfep->name, dep->namelen); |
9d23fc85 | 1227 | tagp = dp->d_ops->data_entry_tag_p(dep); |
4f6ae1a4 | 1228 | *tagp = cpu_to_be16((char *)dep - (char *)hdr); |
bc85178a | 1229 | xfs_dir2_data_log_entry(args, bp, dep); |
5163f95a BN |
1230 | name.name = sfep->name; |
1231 | name.len = sfep->namelen; | |
1232 | blp[2 + i].hashval = cpu_to_be32(mp->m_dirnameops-> | |
1233 | hashname(&name)); | |
25994053 | 1234 | blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr( |
4f6ae1a4 CH |
1235 | (char *)dep - (char *)hdr)); |
1236 | offset = (int)((char *)(tagp + 1) - (char *)hdr); | |
ac8ba50f | 1237 | if (++i == sfp->count) |
1da177e4 LT |
1238 | sfep = NULL; |
1239 | else | |
32c5483a | 1240 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
1241 | } |
1242 | /* Done with the temporary buffer */ | |
ac8ba50f | 1243 | kmem_free(sfp); |
1da177e4 LT |
1244 | /* |
1245 | * Sort the leaf entries by hash value. | |
1246 | */ | |
e922fffa | 1247 | xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort); |
1da177e4 LT |
1248 | /* |
1249 | * Log the leaf entry area and tail. | |
1250 | * Already logged the header in data_init, ignore needlog. | |
1251 | */ | |
1252 | ASSERT(needscan == 0); | |
e922fffa | 1253 | xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1); |
1da177e4 | 1254 | xfs_dir2_block_log_tail(tp, bp); |
33363fee | 1255 | xfs_dir3_data_check(dp, bp); |
1da177e4 LT |
1256 | return 0; |
1257 | } |