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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" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
da353b0d | 25 | #include "xfs_ag.h" |
1da177e4 | 26 | #include "xfs_dir2.h" |
1da177e4 | 27 | #include "xfs_mount.h" |
a844f451 | 28 | #include "xfs_da_btree.h" |
1da177e4 | 29 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
30 | #include "xfs_dir2_sf.h" |
31 | #include "xfs_dinode.h" | |
1da177e4 | 32 | #include "xfs_inode.h" |
a844f451 | 33 | #include "xfs_inode_item.h" |
1da177e4 LT |
34 | #include "xfs_error.h" |
35 | #include "xfs_dir2_data.h" | |
36 | #include "xfs_dir2_leaf.h" | |
37 | #include "xfs_dir2_block.h" | |
0b1b213f | 38 | #include "xfs_trace.h" |
1da177e4 LT |
39 | |
40 | /* | |
41 | * Prototypes for internal functions. | |
42 | */ | |
43 | static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, | |
44 | xfs_dir2_sf_entry_t *sfep, | |
45 | xfs_dir2_data_aoff_t offset, | |
46 | int new_isize); | |
47 | static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, | |
48 | int new_isize); | |
49 | static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, | |
50 | xfs_dir2_sf_entry_t **sfepp, | |
51 | xfs_dir2_data_aoff_t *offsetp); | |
52 | #ifdef DEBUG | |
53 | static void xfs_dir2_sf_check(xfs_da_args_t *args); | |
54 | #else | |
55 | #define xfs_dir2_sf_check(args) | |
56 | #endif /* DEBUG */ | |
57 | #if XFS_BIG_INUMS | |
58 | static void xfs_dir2_sf_toino4(xfs_da_args_t *args); | |
59 | static void xfs_dir2_sf_toino8(xfs_da_args_t *args); | |
60 | #endif /* XFS_BIG_INUMS */ | |
61 | ||
8bc38787 CH |
62 | |
63 | /* | |
64 | * Inode numbers in short-form directories can come in two versions, | |
65 | * either 4 bytes or 8 bytes wide. These helpers deal with the | |
66 | * two forms transparently by looking at the headers i8count field. | |
67 | */ | |
68 | static xfs_ino_t | |
69 | xfs_dir2_sf_get_ino( | |
ac8ba50f | 70 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
71 | xfs_dir2_inou_t *from) |
72 | { | |
ac8ba50f | 73 | if (hdr->i8count) |
8bc38787 CH |
74 | return XFS_GET_DIR_INO8(from->i8); |
75 | else | |
76 | return XFS_GET_DIR_INO4(from->i4); | |
77 | } | |
78 | ||
79 | static void | |
80 | xfs_dir2_sf_put_ino( | |
ac8ba50f | 81 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
82 | xfs_dir2_inou_t *to, |
83 | xfs_ino_t ino) | |
84 | { | |
ac8ba50f | 85 | if (hdr->i8count) |
8bc38787 CH |
86 | XFS_PUT_DIR_INO8(ino, to->i8); |
87 | else | |
88 | XFS_PUT_DIR_INO4(ino, to->i4); | |
89 | } | |
90 | ||
91 | xfs_ino_t | |
92 | xfs_dir2_sf_get_parent_ino( | |
ac8ba50f | 93 | struct xfs_dir2_sf_hdr *hdr) |
8bc38787 | 94 | { |
ac8ba50f | 95 | return xfs_dir2_sf_get_ino(hdr, &hdr->parent); |
8bc38787 CH |
96 | } |
97 | ||
98 | static void | |
99 | xfs_dir2_sf_put_parent_ino( | |
ac8ba50f | 100 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
101 | xfs_ino_t ino) |
102 | { | |
ac8ba50f | 103 | xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino); |
8bc38787 CH |
104 | } |
105 | ||
106 | /* | |
107 | * In short-form directory entries the inode numbers are stored at variable | |
108 | * offset behind the entry name. The inode numbers may only be accessed | |
109 | * through the helpers below. | |
110 | */ | |
111 | static xfs_dir2_inou_t * | |
112 | xfs_dir2_sfe_inop( | |
113 | struct xfs_dir2_sf_entry *sfep) | |
114 | { | |
115 | return (xfs_dir2_inou_t *)&sfep->name[sfep->namelen]; | |
116 | } | |
117 | ||
118 | xfs_ino_t | |
119 | xfs_dir2_sfe_get_ino( | |
ac8ba50f | 120 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
121 | struct xfs_dir2_sf_entry *sfep) |
122 | { | |
ac8ba50f | 123 | return xfs_dir2_sf_get_ino(hdr, xfs_dir2_sfe_inop(sfep)); |
8bc38787 CH |
124 | } |
125 | ||
126 | static void | |
127 | xfs_dir2_sfe_put_ino( | |
ac8ba50f | 128 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
129 | struct xfs_dir2_sf_entry *sfep, |
130 | xfs_ino_t ino) | |
131 | { | |
ac8ba50f | 132 | xfs_dir2_sf_put_ino(hdr, xfs_dir2_sfe_inop(sfep), ino); |
8bc38787 CH |
133 | } |
134 | ||
1da177e4 LT |
135 | /* |
136 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
137 | * directory and a header for the sf directory, if it will fit it the | |
138 | * space currently present in the inode. If it won't fit, the output | |
139 | * size is too big (but not accurate). | |
140 | */ | |
141 | int /* size for sf form */ | |
142 | xfs_dir2_block_sfsize( | |
143 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 144 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
145 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
146 | { | |
147 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
148 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
149 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
150 | int count; /* shortform entry count */ | |
151 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
152 | int i; /* block entry index */ | |
153 | int i8count; /* count of big-inode entries */ | |
154 | int isdot; /* entry is "." */ | |
155 | int isdotdot; /* entry is ".." */ | |
156 | xfs_mount_t *mp; /* mount structure pointer */ | |
157 | int namelen; /* total name bytes */ | |
5bde1ba9 | 158 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 LT |
159 | int size=0; /* total computed size */ |
160 | ||
161 | mp = dp->i_mount; | |
162 | ||
163 | count = i8count = namelen = 0; | |
4f6ae1a4 | 164 | btp = xfs_dir2_block_tail_p(mp, hdr); |
bbaaf538 | 165 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
166 | |
167 | /* | |
168 | * Iterate over the block's data entries by using the leaf pointers. | |
169 | */ | |
e922fffa | 170 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 171 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
172 | continue; |
173 | /* | |
174 | * Calculate the pointer to the entry at hand. | |
175 | */ | |
176 | dep = (xfs_dir2_data_entry_t *) | |
4f6ae1a4 | 177 | ((char *)hdr + xfs_dir2_dataptr_to_off(mp, addr)); |
1da177e4 LT |
178 | /* |
179 | * Detect . and .., so we can special-case them. | |
180 | * . is not included in sf directories. | |
181 | * .. is included by just the parent inode number. | |
182 | */ | |
183 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
184 | isdotdot = | |
185 | dep->namelen == 2 && | |
186 | dep->name[0] == '.' && dep->name[1] == '.'; | |
187 | #if XFS_BIG_INUMS | |
188 | if (!isdot) | |
ff9901c1 | 189 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
1da177e4 LT |
190 | #endif |
191 | if (!isdot && !isdotdot) { | |
192 | count++; | |
193 | namelen += dep->namelen; | |
194 | } else if (isdotdot) | |
ff9901c1 | 195 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
196 | /* |
197 | * Calculate the new size, see if we should give up yet. | |
198 | */ | |
bbaaf538 | 199 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
200 | count + /* namelen */ |
201 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
202 | namelen + /* name */ | |
203 | (i8count ? /* inumber */ | |
204 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
205 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
206 | if (size > XFS_IFORK_DSIZE(dp)) | |
207 | return size; /* size value is a failure */ | |
208 | } | |
209 | /* | |
210 | * Create the output header, if it worked. | |
211 | */ | |
212 | sfhp->count = count; | |
213 | sfhp->i8count = i8count; | |
ac8ba50f | 214 | xfs_dir2_sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
215 | return size; |
216 | } | |
217 | ||
218 | /* | |
219 | * Convert a block format directory to shortform. | |
220 | * Caller has already checked that it will fit, and built us a header. | |
221 | */ | |
222 | int /* error */ | |
223 | xfs_dir2_block_to_sf( | |
224 | xfs_da_args_t *args, /* operation arguments */ | |
225 | xfs_dabuf_t *bp, /* block buffer */ | |
226 | int size, /* shortform directory size */ | |
227 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
228 | { | |
229 | xfs_dir2_block_t *block; /* block structure */ | |
230 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ | |
231 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
232 | xfs_inode_t *dp; /* incore directory inode */ | |
233 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
234 | char *endptr; /* end of data entries */ | |
235 | int error; /* error return value */ | |
236 | int logflags; /* inode logging flags */ | |
237 | xfs_mount_t *mp; /* filesystem mount point */ | |
238 | char *ptr; /* current data pointer */ | |
239 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 240 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
1da177e4 | 241 | |
0b1b213f CH |
242 | trace_xfs_dir2_block_to_sf(args); |
243 | ||
1da177e4 LT |
244 | dp = args->dp; |
245 | mp = dp->i_mount; | |
246 | ||
247 | /* | |
248 | * Make a copy of the block data, so we can shrink the inode | |
249 | * and add local data. | |
250 | */ | |
251 | block = kmem_alloc(mp->m_dirblksize, KM_SLEEP); | |
252 | memcpy(block, bp->data, mp->m_dirblksize); | |
253 | logflags = XFS_ILOG_CORE; | |
254 | if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) { | |
255 | ASSERT(error != ENOSPC); | |
256 | goto out; | |
257 | } | |
4f6ae1a4 | 258 | |
1da177e4 LT |
259 | /* |
260 | * The buffer is now unconditionally gone, whether | |
261 | * xfs_dir2_shrink_inode worked or not. | |
262 | * | |
263 | * Convert the inode to local format. | |
264 | */ | |
265 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
266 | dp->i_df.if_flags |= XFS_IFINLINE; | |
267 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
268 | ASSERT(dp->i_df.if_bytes == 0); | |
269 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
270 | logflags |= XFS_ILOG_DDATA; | |
271 | /* | |
272 | * Copy the header into the newly allocate local space. | |
273 | */ | |
ac8ba50f | 274 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
bbaaf538 | 275 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
1da177e4 LT |
276 | dp->i_d.di_size = size; |
277 | /* | |
278 | * Set up to loop over the block's entries. | |
279 | */ | |
4f6ae1a4 | 280 | btp = xfs_dir2_block_tail_p(mp, &block->hdr); |
1da177e4 | 281 | ptr = (char *)block->u; |
bbaaf538 CH |
282 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
283 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
284 | /* |
285 | * Loop over the active and unused entries. | |
286 | * Stop when we reach the leaf/tail portion of the block. | |
287 | */ | |
288 | while (ptr < endptr) { | |
289 | /* | |
290 | * If it's unused, just skip over it. | |
291 | */ | |
292 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
293 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
294 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
295 | continue; |
296 | } | |
297 | dep = (xfs_dir2_data_entry_t *)ptr; | |
298 | /* | |
299 | * Skip . | |
300 | */ | |
301 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 302 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
303 | /* |
304 | * Skip .., but make sure the inode number is right. | |
305 | */ | |
306 | else if (dep->namelen == 2 && | |
307 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 308 | ASSERT(be64_to_cpu(dep->inumber) == |
8bc38787 | 309 | xfs_dir2_sf_get_parent_ino(sfp)); |
1da177e4 LT |
310 | /* |
311 | * Normal entry, copy it into shortform. | |
312 | */ | |
313 | else { | |
314 | sfep->namelen = dep->namelen; | |
bbaaf538 | 315 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 LT |
316 | (xfs_dir2_data_aoff_t) |
317 | ((char *)dep - (char *)block)); | |
318 | memcpy(sfep->name, dep->name, dep->namelen); | |
8bc38787 CH |
319 | xfs_dir2_sfe_put_ino(sfp, sfep, |
320 | be64_to_cpu(dep->inumber)); | |
321 | ||
bbaaf538 | 322 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); |
1da177e4 | 323 | } |
bbaaf538 | 324 | ptr += xfs_dir2_data_entsize(dep->namelen); |
1da177e4 LT |
325 | } |
326 | ASSERT((char *)sfep - (char *)sfp == size); | |
327 | xfs_dir2_sf_check(args); | |
328 | out: | |
329 | xfs_trans_log_inode(args->trans, dp, logflags); | |
f0e2d93c | 330 | kmem_free(block); |
1da177e4 LT |
331 | return error; |
332 | } | |
333 | ||
334 | /* | |
335 | * Add a name to a shortform directory. | |
336 | * There are two algorithms, "easy" and "hard" which we decide on | |
337 | * before changing anything. | |
338 | * Convert to block form if necessary, if the new entry won't fit. | |
339 | */ | |
340 | int /* error */ | |
341 | xfs_dir2_sf_addname( | |
342 | xfs_da_args_t *args) /* operation arguments */ | |
343 | { | |
344 | int add_entsize; /* size of the new entry */ | |
345 | xfs_inode_t *dp; /* incore directory inode */ | |
346 | int error; /* error return value */ | |
347 | int incr_isize; /* total change in size */ | |
348 | int new_isize; /* di_size after adding name */ | |
349 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 350 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 LT |
351 | int old_isize; /* di_size before adding name */ |
352 | int pick; /* which algorithm to use */ | |
ac8ba50f | 353 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 354 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 355 | |
0b1b213f CH |
356 | trace_xfs_dir2_sf_addname(args); |
357 | ||
1da177e4 LT |
358 | ASSERT(xfs_dir2_sf_lookup(args) == ENOENT); |
359 | dp = args->dp; | |
360 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
361 | /* | |
362 | * Make sure the shortform value has some of its header. | |
363 | */ | |
364 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
365 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
366 | return XFS_ERROR(EIO); | |
367 | } | |
368 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
369 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
370 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
371 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
372 | /* |
373 | * Compute entry (and change in) size. | |
374 | */ | |
78f70cd7 | 375 | add_entsize = xfs_dir2_sf_entsize(sfp, args->namelen); |
1da177e4 LT |
376 | incr_isize = add_entsize; |
377 | objchange = 0; | |
378 | #if XFS_BIG_INUMS | |
379 | /* | |
380 | * Do we have to change to 8 byte inodes? | |
381 | */ | |
ac8ba50f | 382 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
383 | /* |
384 | * Yes, adjust the entry size and the total size. | |
385 | */ | |
386 | add_entsize += | |
387 | (uint)sizeof(xfs_dir2_ino8_t) - | |
388 | (uint)sizeof(xfs_dir2_ino4_t); | |
389 | incr_isize += | |
ac8ba50f | 390 | (sfp->count + 2) * |
1da177e4 LT |
391 | ((uint)sizeof(xfs_dir2_ino8_t) - |
392 | (uint)sizeof(xfs_dir2_ino4_t)); | |
393 | objchange = 1; | |
394 | } | |
395 | #endif | |
396 | old_isize = (int)dp->i_d.di_size; | |
397 | new_isize = old_isize + incr_isize; | |
398 | /* | |
399 | * Won't fit as shortform any more (due to size), | |
400 | * or the pick routine says it won't (due to offset values). | |
401 | */ | |
402 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
403 | (pick = | |
404 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
405 | /* | |
406 | * Just checking or no space reservation, it doesn't fit. | |
407 | */ | |
6a178100 | 408 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
1da177e4 LT |
409 | return XFS_ERROR(ENOSPC); |
410 | /* | |
411 | * Convert to block form then add the name. | |
412 | */ | |
413 | error = xfs_dir2_sf_to_block(args); | |
414 | if (error) | |
415 | return error; | |
416 | return xfs_dir2_block_addname(args); | |
417 | } | |
418 | /* | |
419 | * Just checking, it fits. | |
420 | */ | |
6a178100 | 421 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
422 | return 0; |
423 | /* | |
424 | * Do it the easy way - just add it at the end. | |
425 | */ | |
426 | if (pick == 1) | |
427 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
428 | /* | |
429 | * Do it the hard way - look for a place to insert the new entry. | |
430 | * Convert to 8 byte inode numbers first if necessary. | |
431 | */ | |
432 | else { | |
433 | ASSERT(pick == 2); | |
434 | #if XFS_BIG_INUMS | |
435 | if (objchange) | |
436 | xfs_dir2_sf_toino8(args); | |
437 | #endif | |
438 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); | |
439 | } | |
440 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | /* | |
445 | * Add the new entry the "easy" way. | |
446 | * This is copying the old directory and adding the new entry at the end. | |
447 | * Since it's sorted by "offset" we need room after the last offset | |
448 | * that's already there, and then room to convert to a block directory. | |
449 | * This is already checked by the pick routine. | |
450 | */ | |
451 | static void | |
452 | xfs_dir2_sf_addname_easy( | |
453 | xfs_da_args_t *args, /* operation arguments */ | |
454 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
455 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
456 | int new_isize) /* new directory size */ | |
457 | { | |
458 | int byteoff; /* byte offset in sf dir */ | |
459 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 460 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
461 | |
462 | dp = args->dp; | |
463 | ||
ac8ba50f | 464 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
465 | byteoff = (int)((char *)sfep - (char *)sfp); |
466 | /* | |
467 | * Grow the in-inode space. | |
468 | */ | |
78f70cd7 | 469 | xfs_idata_realloc(dp, xfs_dir2_sf_entsize(sfp, args->namelen), |
1da177e4 LT |
470 | XFS_DATA_FORK); |
471 | /* | |
472 | * Need to set up again due to realloc of the inode data. | |
473 | */ | |
ac8ba50f | 474 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
475 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
476 | /* | |
477 | * Fill in the new entry. | |
478 | */ | |
479 | sfep->namelen = args->namelen; | |
bbaaf538 | 480 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 481 | memcpy(sfep->name, args->name, sfep->namelen); |
8bc38787 | 482 | xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); |
1da177e4 LT |
483 | /* |
484 | * Update the header and inode. | |
485 | */ | |
ac8ba50f | 486 | sfp->count++; |
1da177e4 LT |
487 | #if XFS_BIG_INUMS |
488 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) | |
ac8ba50f | 489 | sfp->i8count++; |
1da177e4 LT |
490 | #endif |
491 | dp->i_d.di_size = new_isize; | |
492 | xfs_dir2_sf_check(args); | |
493 | } | |
494 | ||
495 | /* | |
496 | * Add the new entry the "hard" way. | |
497 | * The caller has already converted to 8 byte inode numbers if necessary, | |
498 | * in which case we need to leave the i8count at 1. | |
499 | * Find a hole that the new entry will fit into, and copy | |
500 | * the first part of the entries, the new entry, and the last part of | |
501 | * the entries. | |
502 | */ | |
503 | /* ARGSUSED */ | |
504 | static void | |
505 | xfs_dir2_sf_addname_hard( | |
506 | xfs_da_args_t *args, /* operation arguments */ | |
507 | int objchange, /* changing inode number size */ | |
508 | int new_isize) /* new directory size */ | |
509 | { | |
510 | int add_datasize; /* data size need for new ent */ | |
511 | char *buf; /* buffer for old */ | |
512 | xfs_inode_t *dp; /* incore directory inode */ | |
513 | int eof; /* reached end of old dir */ | |
514 | int nbytes; /* temp for byte copies */ | |
515 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
516 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
517 | int old_isize; /* previous di_size */ | |
518 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 519 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 520 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 521 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
1da177e4 LT |
522 | |
523 | /* | |
524 | * Copy the old directory to the stack buffer. | |
525 | */ | |
526 | dp = args->dp; | |
527 | ||
ac8ba50f | 528 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
529 | old_isize = (int)dp->i_d.di_size; |
530 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 531 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
532 | memcpy(oldsfp, sfp, old_isize); |
533 | /* | |
534 | * Loop over the old directory finding the place we're going | |
535 | * to insert the new entry. | |
536 | * If it's going to end up at the end then oldsfep will point there. | |
537 | */ | |
538 | for (offset = XFS_DIR2_DATA_FIRST_OFFSET, | |
bbaaf538 CH |
539 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
540 | add_datasize = xfs_dir2_data_entsize(args->namelen), | |
1da177e4 LT |
541 | eof = (char *)oldsfep == &buf[old_isize]; |
542 | !eof; | |
bbaaf538 CH |
543 | offset = new_offset + xfs_dir2_data_entsize(oldsfep->namelen), |
544 | oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep), | |
1da177e4 | 545 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 546 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
547 | if (offset + add_datasize <= new_offset) |
548 | break; | |
549 | } | |
550 | /* | |
551 | * Get rid of the old directory, then allocate space for | |
552 | * the new one. We do this so xfs_idata_realloc won't copy | |
553 | * the data. | |
554 | */ | |
555 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
556 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
557 | /* | |
558 | * Reset the pointer since the buffer was reallocated. | |
559 | */ | |
ac8ba50f | 560 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
561 | /* |
562 | * Copy the first part of the directory, including the header. | |
563 | */ | |
564 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
565 | memcpy(sfp, oldsfp, nbytes); | |
566 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
567 | /* | |
568 | * Fill in the new entry, and update the header counts. | |
569 | */ | |
570 | sfep->namelen = args->namelen; | |
bbaaf538 | 571 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 572 | memcpy(sfep->name, args->name, sfep->namelen); |
8bc38787 | 573 | xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); |
ac8ba50f | 574 | sfp->count++; |
1da177e4 LT |
575 | #if XFS_BIG_INUMS |
576 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) | |
ac8ba50f | 577 | sfp->i8count++; |
1da177e4 LT |
578 | #endif |
579 | /* | |
580 | * If there's more left to copy, do that. | |
581 | */ | |
582 | if (!eof) { | |
bbaaf538 | 583 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); |
1da177e4 LT |
584 | memcpy(sfep, oldsfep, old_isize - nbytes); |
585 | } | |
f0e2d93c | 586 | kmem_free(buf); |
1da177e4 LT |
587 | dp->i_d.di_size = new_isize; |
588 | xfs_dir2_sf_check(args); | |
589 | } | |
590 | ||
591 | /* | |
592 | * Decide if the new entry will fit at all. | |
593 | * If it will fit, pick between adding the new entry to the end (easy) | |
594 | * or somewhere else (hard). | |
595 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
596 | */ | |
597 | /*ARGSUSED*/ | |
598 | static int /* pick result */ | |
599 | xfs_dir2_sf_addname_pick( | |
600 | xfs_da_args_t *args, /* operation arguments */ | |
601 | int objchange, /* inode # size changes */ | |
602 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
603 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
604 | { | |
605 | xfs_inode_t *dp; /* incore directory inode */ | |
606 | int holefit; /* found hole it will fit in */ | |
607 | int i; /* entry number */ | |
608 | xfs_mount_t *mp; /* filesystem mount point */ | |
609 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
610 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 611 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
612 | int size; /* entry's data size */ |
613 | int used; /* data bytes used */ | |
614 | ||
615 | dp = args->dp; | |
616 | mp = dp->i_mount; | |
617 | ||
ac8ba50f | 618 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
bbaaf538 | 619 | size = xfs_dir2_data_entsize(args->namelen); |
1da177e4 | 620 | offset = XFS_DIR2_DATA_FIRST_OFFSET; |
bbaaf538 | 621 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
622 | holefit = 0; |
623 | /* | |
624 | * Loop over sf entries. | |
625 | * Keep track of data offset and whether we've seen a place | |
626 | * to insert the new entry. | |
627 | */ | |
ac8ba50f | 628 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 629 | if (!holefit) |
bbaaf538 CH |
630 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
631 | offset = xfs_dir2_sf_get_offset(sfep) + | |
632 | xfs_dir2_data_entsize(sfep->namelen); | |
633 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); | |
1da177e4 LT |
634 | } |
635 | /* | |
636 | * Calculate data bytes used excluding the new entry, if this | |
637 | * was a data block (block form directory). | |
638 | */ | |
639 | used = offset + | |
ac8ba50f | 640 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
641 | (uint)sizeof(xfs_dir2_block_tail_t); |
642 | /* | |
643 | * If it won't fit in a block form then we can't insert it, | |
644 | * we'll go back, convert to block, then try the insert and convert | |
645 | * to leaf. | |
646 | */ | |
647 | if (used + (holefit ? 0 : size) > mp->m_dirblksize) | |
648 | return 0; | |
649 | /* | |
650 | * If changing the inode number size, do it the hard way. | |
651 | */ | |
652 | #if XFS_BIG_INUMS | |
653 | if (objchange) { | |
654 | return 2; | |
655 | } | |
656 | #else | |
657 | ASSERT(objchange == 0); | |
658 | #endif | |
659 | /* | |
660 | * If it won't fit at the end then do it the hard way (use the hole). | |
661 | */ | |
662 | if (used + size > mp->m_dirblksize) | |
663 | return 2; | |
664 | /* | |
665 | * Do it the easy way. | |
666 | */ | |
667 | *sfepp = sfep; | |
668 | *offsetp = offset; | |
669 | return 1; | |
670 | } | |
671 | ||
672 | #ifdef DEBUG | |
673 | /* | |
674 | * Check consistency of shortform directory, assert if bad. | |
675 | */ | |
676 | static void | |
677 | xfs_dir2_sf_check( | |
678 | xfs_da_args_t *args) /* operation arguments */ | |
679 | { | |
680 | xfs_inode_t *dp; /* incore directory inode */ | |
681 | int i; /* entry number */ | |
682 | int i8count; /* number of big inode#s */ | |
683 | xfs_ino_t ino; /* entry inode number */ | |
684 | int offset; /* data offset */ | |
685 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 686 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
687 | |
688 | dp = args->dp; | |
689 | ||
ac8ba50f | 690 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 | 691 | offset = XFS_DIR2_DATA_FIRST_OFFSET; |
8bc38787 | 692 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
1da177e4 LT |
693 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
694 | ||
bbaaf538 | 695 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 696 | i < sfp->count; |
bbaaf538 CH |
697 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
698 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); | |
8bc38787 | 699 | ino = xfs_dir2_sfe_get_ino(sfp, sfep); |
1da177e4 LT |
700 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
701 | offset = | |
bbaaf538 CH |
702 | xfs_dir2_sf_get_offset(sfep) + |
703 | xfs_dir2_data_entsize(sfep->namelen); | |
1da177e4 | 704 | } |
ac8ba50f | 705 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
706 | ASSERT(XFS_BIG_INUMS || i8count == 0); |
707 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); | |
708 | ASSERT(offset + | |
ac8ba50f | 709 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
710 | (uint)sizeof(xfs_dir2_block_tail_t) <= |
711 | dp->i_mount->m_dirblksize); | |
712 | } | |
713 | #endif /* DEBUG */ | |
714 | ||
715 | /* | |
716 | * Create a new (shortform) directory. | |
717 | */ | |
718 | int /* error, always 0 */ | |
719 | xfs_dir2_sf_create( | |
720 | xfs_da_args_t *args, /* operation arguments */ | |
721 | xfs_ino_t pino) /* parent inode number */ | |
722 | { | |
723 | xfs_inode_t *dp; /* incore directory inode */ | |
724 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 725 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
726 | int size; /* directory size */ |
727 | ||
0b1b213f CH |
728 | trace_xfs_dir2_sf_create(args); |
729 | ||
1da177e4 LT |
730 | dp = args->dp; |
731 | ||
732 | ASSERT(dp != NULL); | |
733 | ASSERT(dp->i_d.di_size == 0); | |
734 | /* | |
735 | * If it's currently a zero-length extent file, | |
736 | * convert it to local format. | |
737 | */ | |
738 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
739 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
740 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
741 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
742 | dp->i_df.if_flags |= XFS_IFINLINE; | |
743 | } | |
744 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
745 | ASSERT(dp->i_df.if_bytes == 0); | |
746 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 747 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
748 | /* |
749 | * Make a buffer for the data. | |
750 | */ | |
751 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
752 | /* | |
753 | * Fill in the header, | |
754 | */ | |
ac8ba50f CH |
755 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
756 | sfp->i8count = i8count; | |
1da177e4 LT |
757 | /* |
758 | * Now can put in the inode number, since i8count is set. | |
759 | */ | |
8bc38787 | 760 | xfs_dir2_sf_put_parent_ino(sfp, pino); |
ac8ba50f | 761 | sfp->count = 0; |
1da177e4 LT |
762 | dp->i_d.di_size = size; |
763 | xfs_dir2_sf_check(args); | |
764 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
765 | return 0; | |
766 | } | |
767 | ||
768 | int /* error */ | |
769 | xfs_dir2_sf_getdents( | |
770 | xfs_inode_t *dp, /* incore directory inode */ | |
051e7cd4 CH |
771 | void *dirent, |
772 | xfs_off_t *offset, | |
773 | filldir_t filldir) | |
1da177e4 | 774 | { |
1da177e4 LT |
775 | int i; /* shortform entry number */ |
776 | xfs_mount_t *mp; /* filesystem mount point */ | |
777 | xfs_dir2_dataptr_t off; /* current entry's offset */ | |
1da177e4 | 778 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 779 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
051e7cd4 CH |
780 | xfs_dir2_dataptr_t dot_offset; |
781 | xfs_dir2_dataptr_t dotdot_offset; | |
782 | xfs_ino_t ino; | |
1da177e4 LT |
783 | |
784 | mp = dp->i_mount; | |
785 | ||
786 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
787 | /* | |
788 | * Give up if the directory is way too short. | |
789 | */ | |
790 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
791 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
792 | return XFS_ERROR(EIO); | |
793 | } | |
794 | ||
1da177e4 LT |
795 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); |
796 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
797 | ||
ac8ba50f | 798 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 | 799 | |
ac8ba50f | 800 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); |
1da177e4 LT |
801 | |
802 | /* | |
803 | * If the block number in the offset is out of range, we're done. | |
804 | */ | |
051e7cd4 | 805 | if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk) |
1da177e4 | 806 | return 0; |
1da177e4 LT |
807 | |
808 | /* | |
051e7cd4 CH |
809 | * Precalculate offsets for . and .. as we will always need them. |
810 | * | |
811 | * XXX(hch): the second argument is sometimes 0 and sometimes | |
812 | * mp->m_dirdatablk. | |
1da177e4 | 813 | */ |
051e7cd4 CH |
814 | dot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, |
815 | XFS_DIR2_DATA_DOT_OFFSET); | |
816 | dotdot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, | |
817 | XFS_DIR2_DATA_DOTDOT_OFFSET); | |
818 | ||
1da177e4 LT |
819 | /* |
820 | * Put . entry unless we're starting past it. | |
821 | */ | |
051e7cd4 | 822 | if (*offset <= dot_offset) { |
a19d9f88 | 823 | if (filldir(dirent, ".", 1, dot_offset & 0x7fffffff, dp->i_ino, DT_DIR)) { |
15440319 | 824 | *offset = dot_offset & 0x7fffffff; |
051e7cd4 | 825 | return 0; |
1da177e4 LT |
826 | } |
827 | } | |
828 | ||
829 | /* | |
830 | * Put .. entry unless we're starting past it. | |
831 | */ | |
051e7cd4 | 832 | if (*offset <= dotdot_offset) { |
8bc38787 | 833 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
15440319 CH |
834 | if (filldir(dirent, "..", 2, dotdot_offset & 0x7fffffff, ino, DT_DIR)) { |
835 | *offset = dotdot_offset & 0x7fffffff; | |
051e7cd4 | 836 | return 0; |
1da177e4 LT |
837 | } |
838 | } | |
839 | ||
840 | /* | |
841 | * Loop while there are more entries and put'ing works. | |
842 | */ | |
051e7cd4 | 843 | sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 844 | for (i = 0; i < sfp->count; i++) { |
bbaaf538 CH |
845 | off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, |
846 | xfs_dir2_sf_get_offset(sfep)); | |
1da177e4 | 847 | |
051e7cd4 CH |
848 | if (*offset > off) { |
849 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); | |
1da177e4 | 850 | continue; |
051e7cd4 | 851 | } |
1da177e4 | 852 | |
8bc38787 | 853 | ino = xfs_dir2_sfe_get_ino(sfp, sfep); |
4a24cb71 | 854 | if (filldir(dirent, (char *)sfep->name, sfep->namelen, |
15440319 CH |
855 | off & 0x7fffffff, ino, DT_UNKNOWN)) { |
856 | *offset = off & 0x7fffffff; | |
051e7cd4 | 857 | return 0; |
1da177e4 | 858 | } |
051e7cd4 | 859 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); |
1da177e4 LT |
860 | } |
861 | ||
15440319 CH |
862 | *offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0) & |
863 | 0x7fffffff; | |
1da177e4 LT |
864 | return 0; |
865 | } | |
866 | ||
867 | /* | |
868 | * Lookup an entry in a shortform directory. | |
869 | * Returns EEXIST if found, ENOENT if not found. | |
870 | */ | |
871 | int /* error */ | |
872 | xfs_dir2_sf_lookup( | |
873 | xfs_da_args_t *args) /* operation arguments */ | |
874 | { | |
875 | xfs_inode_t *dp; /* incore directory inode */ | |
876 | int i; /* entry index */ | |
384f3ced | 877 | int error; |
1da177e4 | 878 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 879 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 880 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 881 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 882 | |
0b1b213f CH |
883 | trace_xfs_dir2_sf_lookup(args); |
884 | ||
1da177e4 LT |
885 | xfs_dir2_sf_check(args); |
886 | dp = args->dp; | |
887 | ||
888 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
889 | /* | |
890 | * Bail out if the directory is way too short. | |
891 | */ | |
892 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
893 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
894 | return XFS_ERROR(EIO); | |
895 | } | |
896 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
897 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
898 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
899 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
900 | /* |
901 | * Special case for . | |
902 | */ | |
903 | if (args->namelen == 1 && args->name[0] == '.') { | |
904 | args->inumber = dp->i_ino; | |
5163f95a | 905 | args->cmpresult = XFS_CMP_EXACT; |
1da177e4 LT |
906 | return XFS_ERROR(EEXIST); |
907 | } | |
908 | /* | |
909 | * Special case for .. | |
910 | */ | |
911 | if (args->namelen == 2 && | |
912 | args->name[0] == '.' && args->name[1] == '.') { | |
8bc38787 | 913 | args->inumber = xfs_dir2_sf_get_parent_ino(sfp); |
5163f95a | 914 | args->cmpresult = XFS_CMP_EXACT; |
1da177e4 LT |
915 | return XFS_ERROR(EEXIST); |
916 | } | |
917 | /* | |
918 | * Loop over all the entries trying to match ours. | |
919 | */ | |
384f3ced | 920 | ci_sfep = NULL; |
ac8ba50f | 921 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
5163f95a BN |
922 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
923 | /* | |
924 | * Compare name and if it's an exact match, return the inode | |
925 | * number. If it's the first case-insensitive match, store the | |
926 | * inode number and continue looking for an exact match. | |
927 | */ | |
928 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
929 | sfep->namelen); | |
930 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
931 | args->cmpresult = cmp; | |
8bc38787 | 932 | args->inumber = xfs_dir2_sfe_get_ino(sfp, sfep); |
5163f95a BN |
933 | if (cmp == XFS_CMP_EXACT) |
934 | return XFS_ERROR(EEXIST); | |
384f3ced | 935 | ci_sfep = sfep; |
1da177e4 LT |
936 | } |
937 | } | |
6a178100 | 938 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
939 | /* |
940 | * Here, we can only be doing a lookup (not a rename or replace). | |
384f3ced | 941 | * If a case-insensitive match was not found, return ENOENT. |
5163f95a | 942 | */ |
384f3ced BN |
943 | if (!ci_sfep) |
944 | return XFS_ERROR(ENOENT); | |
945 | /* otherwise process the CI match as required by the caller */ | |
946 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
947 | return XFS_ERROR(error); | |
1da177e4 LT |
948 | } |
949 | ||
950 | /* | |
951 | * Remove an entry from a shortform directory. | |
952 | */ | |
953 | int /* error */ | |
954 | xfs_dir2_sf_removename( | |
955 | xfs_da_args_t *args) | |
956 | { | |
957 | int byteoff; /* offset of removed entry */ | |
958 | xfs_inode_t *dp; /* incore directory inode */ | |
959 | int entsize; /* this entry's size */ | |
960 | int i; /* shortform entry index */ | |
961 | int newsize; /* new inode size */ | |
962 | int oldsize; /* old inode size */ | |
963 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 964 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 965 | |
0b1b213f CH |
966 | trace_xfs_dir2_sf_removename(args); |
967 | ||
1da177e4 LT |
968 | dp = args->dp; |
969 | ||
970 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
971 | oldsize = (int)dp->i_d.di_size; | |
972 | /* | |
973 | * Bail out if the directory is way too short. | |
974 | */ | |
975 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
976 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
977 | return XFS_ERROR(EIO); | |
978 | } | |
979 | ASSERT(dp->i_df.if_bytes == oldsize); | |
980 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
981 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
982 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
983 | /* |
984 | * Loop over the old directory entries. | |
985 | * Find the one we're deleting. | |
986 | */ | |
ac8ba50f | 987 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
5163f95a BN |
988 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
989 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == | |
990 | XFS_CMP_EXACT) { | |
8bc38787 CH |
991 | ASSERT(xfs_dir2_sfe_get_ino(sfp, sfep) == |
992 | args->inumber); | |
1da177e4 LT |
993 | break; |
994 | } | |
995 | } | |
996 | /* | |
997 | * Didn't find it. | |
998 | */ | |
ac8ba50f | 999 | if (i == sfp->count) |
1da177e4 | 1000 | return XFS_ERROR(ENOENT); |
1da177e4 LT |
1001 | /* |
1002 | * Calculate sizes. | |
1003 | */ | |
1004 | byteoff = (int)((char *)sfep - (char *)sfp); | |
78f70cd7 | 1005 | entsize = xfs_dir2_sf_entsize(sfp, args->namelen); |
1da177e4 LT |
1006 | newsize = oldsize - entsize; |
1007 | /* | |
1008 | * Copy the part if any after the removed entry, sliding it down. | |
1009 | */ | |
1010 | if (byteoff + entsize < oldsize) | |
1011 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
1012 | oldsize - (byteoff + entsize)); | |
1013 | /* | |
1014 | * Fix up the header and file size. | |
1015 | */ | |
ac8ba50f | 1016 | sfp->count--; |
1da177e4 LT |
1017 | dp->i_d.di_size = newsize; |
1018 | /* | |
1019 | * Reallocate, making it smaller. | |
1020 | */ | |
1021 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 1022 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
1023 | #if XFS_BIG_INUMS |
1024 | /* | |
1025 | * Are we changing inode number size? | |
1026 | */ | |
1027 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 1028 | if (sfp->i8count == 1) |
1da177e4 LT |
1029 | xfs_dir2_sf_toino4(args); |
1030 | else | |
ac8ba50f | 1031 | sfp->i8count--; |
1da177e4 LT |
1032 | } |
1033 | #endif | |
1034 | xfs_dir2_sf_check(args); | |
1035 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Replace the inode number of an entry in a shortform directory. | |
1041 | */ | |
1042 | int /* error */ | |
1043 | xfs_dir2_sf_replace( | |
1044 | xfs_da_args_t *args) /* operation arguments */ | |
1045 | { | |
1046 | xfs_inode_t *dp; /* incore directory inode */ | |
1047 | int i; /* entry index */ | |
1048 | #if XFS_BIG_INUMS || defined(DEBUG) | |
1049 | xfs_ino_t ino=0; /* entry old inode number */ | |
1050 | #endif | |
1051 | #if XFS_BIG_INUMS | |
1052 | int i8elevated; /* sf_toino8 set i8count=1 */ | |
1053 | #endif | |
1054 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 1055 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 1056 | |
0b1b213f CH |
1057 | trace_xfs_dir2_sf_replace(args); |
1058 | ||
1da177e4 LT |
1059 | dp = args->dp; |
1060 | ||
1061 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
1062 | /* | |
1063 | * Bail out if the shortform directory is way too small. | |
1064 | */ | |
1065 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
1066 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
1067 | return XFS_ERROR(EIO); | |
1068 | } | |
1069 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
1070 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
1071 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1072 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
1073 | #if XFS_BIG_INUMS |
1074 | /* | |
1075 | * New inode number is large, and need to convert to 8-byte inodes. | |
1076 | */ | |
ac8ba50f | 1077 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
1078 | int error; /* error return value */ |
1079 | int newsize; /* new inode size */ | |
1080 | ||
1081 | newsize = | |
1082 | dp->i_df.if_bytes + | |
ac8ba50f | 1083 | (sfp->count + 1) * |
1da177e4 LT |
1084 | ((uint)sizeof(xfs_dir2_ino8_t) - |
1085 | (uint)sizeof(xfs_dir2_ino4_t)); | |
1086 | /* | |
1087 | * Won't fit as shortform, convert to block then do replace. | |
1088 | */ | |
1089 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
1090 | error = xfs_dir2_sf_to_block(args); | |
1091 | if (error) { | |
1092 | return error; | |
1093 | } | |
1094 | return xfs_dir2_block_replace(args); | |
1095 | } | |
1096 | /* | |
1097 | * Still fits, convert to 8-byte now. | |
1098 | */ | |
1099 | xfs_dir2_sf_toino8(args); | |
1100 | i8elevated = 1; | |
ac8ba50f | 1101 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
1102 | } else |
1103 | i8elevated = 0; | |
1104 | #endif | |
1105 | ASSERT(args->namelen != 1 || args->name[0] != '.'); | |
1106 | /* | |
1107 | * Replace ..'s entry. | |
1108 | */ | |
1109 | if (args->namelen == 2 && | |
1110 | args->name[0] == '.' && args->name[1] == '.') { | |
1111 | #if XFS_BIG_INUMS || defined(DEBUG) | |
8bc38787 | 1112 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
1da177e4 LT |
1113 | ASSERT(args->inumber != ino); |
1114 | #endif | |
8bc38787 | 1115 | xfs_dir2_sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
1116 | } |
1117 | /* | |
1118 | * Normal entry, look for the name. | |
1119 | */ | |
1120 | else { | |
bbaaf538 | 1121 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 1122 | i < sfp->count; |
5163f95a BN |
1123 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
1124 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == | |
1125 | XFS_CMP_EXACT) { | |
1da177e4 | 1126 | #if XFS_BIG_INUMS || defined(DEBUG) |
8bc38787 | 1127 | ino = xfs_dir2_sfe_get_ino(sfp, sfep); |
1da177e4 LT |
1128 | ASSERT(args->inumber != ino); |
1129 | #endif | |
8bc38787 | 1130 | xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); |
1da177e4 LT |
1131 | break; |
1132 | } | |
1133 | } | |
1134 | /* | |
1135 | * Didn't find it. | |
1136 | */ | |
ac8ba50f | 1137 | if (i == sfp->count) { |
6a178100 | 1138 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
1139 | #if XFS_BIG_INUMS |
1140 | if (i8elevated) | |
1141 | xfs_dir2_sf_toino4(args); | |
1142 | #endif | |
1143 | return XFS_ERROR(ENOENT); | |
1144 | } | |
1145 | } | |
1146 | #if XFS_BIG_INUMS | |
1147 | /* | |
1148 | * See if the old number was large, the new number is small. | |
1149 | */ | |
1150 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
1151 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
1152 | /* | |
1153 | * And the old count was one, so need to convert to small. | |
1154 | */ | |
ac8ba50f | 1155 | if (sfp->i8count == 1) |
1da177e4 LT |
1156 | xfs_dir2_sf_toino4(args); |
1157 | else | |
ac8ba50f | 1158 | sfp->i8count--; |
1da177e4 LT |
1159 | } |
1160 | /* | |
1161 | * See if the old number was small, the new number is large. | |
1162 | */ | |
1163 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
1164 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
1165 | /* | |
1166 | * add to the i8count unless we just converted to 8-byte | |
1167 | * inodes (which does an implied i8count = 1) | |
1168 | */ | |
ac8ba50f | 1169 | ASSERT(sfp->i8count != 0); |
1da177e4 | 1170 | if (!i8elevated) |
ac8ba50f | 1171 | sfp->i8count++; |
1da177e4 LT |
1172 | } |
1173 | #endif | |
1174 | xfs_dir2_sf_check(args); | |
1175 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | #if XFS_BIG_INUMS | |
1180 | /* | |
1181 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1182 | * The last 8-byte inode number is gone, but the count is still 1. | |
1183 | */ | |
1184 | static void | |
1185 | xfs_dir2_sf_toino4( | |
1186 | xfs_da_args_t *args) /* operation arguments */ | |
1187 | { | |
1188 | char *buf; /* old dir's buffer */ | |
1189 | xfs_inode_t *dp; /* incore directory inode */ | |
1190 | int i; /* entry index */ | |
1da177e4 LT |
1191 | int newsize; /* new inode size */ |
1192 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1193 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1194 | int oldsize; /* old inode size */ |
1195 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1196 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1197 | |
0b1b213f CH |
1198 | trace_xfs_dir2_sf_toino4(args); |
1199 | ||
1da177e4 LT |
1200 | dp = args->dp; |
1201 | ||
1202 | /* | |
1203 | * Copy the old directory to the buffer. | |
1204 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1205 | * Don't want xfs_idata_realloc copying the data here. | |
1206 | */ | |
1207 | oldsize = dp->i_df.if_bytes; | |
1208 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1209 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1210 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1211 | memcpy(buf, oldsfp, oldsize); |
1212 | /* | |
1213 | * Compute the new inode size. | |
1214 | */ | |
1215 | newsize = | |
1216 | oldsize - | |
ac8ba50f | 1217 | (oldsfp->count + 1) * |
1da177e4 LT |
1218 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1219 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1220 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1221 | /* | |
1222 | * Reset our pointers, the data has moved. | |
1223 | */ | |
ac8ba50f CH |
1224 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1225 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1226 | /* |
1227 | * Fill in the new header. | |
1228 | */ | |
ac8ba50f CH |
1229 | sfp->count = oldsfp->count; |
1230 | sfp->i8count = 0; | |
8bc38787 | 1231 | xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1232 | /* |
1233 | * Copy the entries field by field. | |
1234 | */ | |
bbaaf538 CH |
1235 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1236 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1237 | i < sfp->count; |
bbaaf538 CH |
1238 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep), |
1239 | oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1240 | sfep->namelen = oldsfep->namelen; |
1241 | sfep->offset = oldsfep->offset; | |
1242 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
8bc38787 CH |
1243 | xfs_dir2_sfe_put_ino(sfp, sfep, |
1244 | xfs_dir2_sfe_get_ino(oldsfp, oldsfep)); | |
1da177e4 LT |
1245 | } |
1246 | /* | |
1247 | * Clean up the inode. | |
1248 | */ | |
f0e2d93c | 1249 | kmem_free(buf); |
1da177e4 LT |
1250 | dp->i_d.di_size = newsize; |
1251 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Convert from 4-byte inode numbers to 8-byte inode numbers. | |
1256 | * The new 8-byte inode number is not there yet, we leave with the | |
1257 | * count 1 but no corresponding entry. | |
1258 | */ | |
1259 | static void | |
1260 | xfs_dir2_sf_toino8( | |
1261 | xfs_da_args_t *args) /* operation arguments */ | |
1262 | { | |
1263 | char *buf; /* old dir's buffer */ | |
1264 | xfs_inode_t *dp; /* incore directory inode */ | |
1265 | int i; /* entry index */ | |
1da177e4 LT |
1266 | int newsize; /* new inode size */ |
1267 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1268 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1269 | int oldsize; /* old inode size */ |
1270 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1271 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1272 | |
0b1b213f CH |
1273 | trace_xfs_dir2_sf_toino8(args); |
1274 | ||
1da177e4 LT |
1275 | dp = args->dp; |
1276 | ||
1277 | /* | |
1278 | * Copy the old directory to the buffer. | |
1279 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1280 | * Don't want xfs_idata_realloc copying the data here. | |
1281 | */ | |
1282 | oldsize = dp->i_df.if_bytes; | |
1283 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1284 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1285 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1286 | memcpy(buf, oldsfp, oldsize); |
1287 | /* | |
1288 | * Compute the new inode size. | |
1289 | */ | |
1290 | newsize = | |
1291 | oldsize + | |
ac8ba50f | 1292 | (oldsfp->count + 1) * |
1da177e4 LT |
1293 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1294 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1295 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1296 | /* | |
1297 | * Reset our pointers, the data has moved. | |
1298 | */ | |
ac8ba50f CH |
1299 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1300 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1301 | /* |
1302 | * Fill in the new header. | |
1303 | */ | |
ac8ba50f CH |
1304 | sfp->count = oldsfp->count; |
1305 | sfp->i8count = 1; | |
8bc38787 | 1306 | xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1307 | /* |
1308 | * Copy the entries field by field. | |
1309 | */ | |
bbaaf538 CH |
1310 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1311 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1312 | i < sfp->count; |
bbaaf538 CH |
1313 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep), |
1314 | oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1315 | sfep->namelen = oldsfep->namelen; |
1316 | sfep->offset = oldsfep->offset; | |
1317 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
8bc38787 CH |
1318 | xfs_dir2_sfe_put_ino(sfp, sfep, |
1319 | xfs_dir2_sfe_get_ino(oldsfp, oldsfep)); | |
1da177e4 LT |
1320 | } |
1321 | /* | |
1322 | * Clean up the inode. | |
1323 | */ | |
f0e2d93c | 1324 | kmem_free(buf); |
1da177e4 LT |
1325 | dp->i_d.di_size = newsize; |
1326 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1327 | } | |
1328 | #endif /* XFS_BIG_INUMS */ |