Commit | Line | Data |
---|---|---|
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 | * Inode numbers in short-form directories can come in two versions, | |
64 | * either 4 bytes or 8 bytes wide. These helpers deal with the | |
65 | * two forms transparently by looking at the headers i8count field. | |
218106a1 CH |
66 | * |
67 | * For 64-bit inode number the most significant byte must be zero. | |
8bc38787 CH |
68 | */ |
69 | static xfs_ino_t | |
70 | xfs_dir2_sf_get_ino( | |
ac8ba50f | 71 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
72 | xfs_dir2_inou_t *from) |
73 | { | |
ac8ba50f | 74 | if (hdr->i8count) |
218106a1 | 75 | return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL; |
8bc38787 | 76 | else |
218106a1 | 77 | return get_unaligned_be32(&from->i4.i); |
8bc38787 CH |
78 | } |
79 | ||
80 | static void | |
81 | xfs_dir2_sf_put_ino( | |
ac8ba50f | 82 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
83 | xfs_dir2_inou_t *to, |
84 | xfs_ino_t ino) | |
85 | { | |
218106a1 CH |
86 | ASSERT((ino & 0xff00000000000000ULL) == 0); |
87 | ||
ac8ba50f | 88 | if (hdr->i8count) |
218106a1 | 89 | put_unaligned_be64(ino, &to->i8.i); |
8bc38787 | 90 | else |
218106a1 | 91 | put_unaligned_be32(ino, &to->i4.i); |
8bc38787 CH |
92 | } |
93 | ||
94 | xfs_ino_t | |
95 | xfs_dir2_sf_get_parent_ino( | |
ac8ba50f | 96 | struct xfs_dir2_sf_hdr *hdr) |
8bc38787 | 97 | { |
ac8ba50f | 98 | return xfs_dir2_sf_get_ino(hdr, &hdr->parent); |
8bc38787 CH |
99 | } |
100 | ||
101 | static void | |
102 | xfs_dir2_sf_put_parent_ino( | |
ac8ba50f | 103 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
104 | xfs_ino_t ino) |
105 | { | |
ac8ba50f | 106 | xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino); |
8bc38787 CH |
107 | } |
108 | ||
109 | /* | |
110 | * In short-form directory entries the inode numbers are stored at variable | |
111 | * offset behind the entry name. The inode numbers may only be accessed | |
112 | * through the helpers below. | |
113 | */ | |
114 | static xfs_dir2_inou_t * | |
115 | xfs_dir2_sfe_inop( | |
116 | struct xfs_dir2_sf_entry *sfep) | |
117 | { | |
118 | return (xfs_dir2_inou_t *)&sfep->name[sfep->namelen]; | |
119 | } | |
120 | ||
121 | xfs_ino_t | |
122 | xfs_dir2_sfe_get_ino( | |
ac8ba50f | 123 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
124 | struct xfs_dir2_sf_entry *sfep) |
125 | { | |
ac8ba50f | 126 | return xfs_dir2_sf_get_ino(hdr, xfs_dir2_sfe_inop(sfep)); |
8bc38787 CH |
127 | } |
128 | ||
129 | static void | |
130 | xfs_dir2_sfe_put_ino( | |
ac8ba50f | 131 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
132 | struct xfs_dir2_sf_entry *sfep, |
133 | xfs_ino_t ino) | |
134 | { | |
ac8ba50f | 135 | xfs_dir2_sf_put_ino(hdr, xfs_dir2_sfe_inop(sfep), ino); |
8bc38787 CH |
136 | } |
137 | ||
1da177e4 LT |
138 | /* |
139 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
140 | * directory and a header for the sf directory, if it will fit it the | |
141 | * space currently present in the inode. If it won't fit, the output | |
142 | * size is too big (but not accurate). | |
143 | */ | |
144 | int /* size for sf form */ | |
145 | xfs_dir2_block_sfsize( | |
146 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 147 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
148 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
149 | { | |
150 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
151 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
152 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
153 | int count; /* shortform entry count */ | |
154 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
155 | int i; /* block entry index */ | |
156 | int i8count; /* count of big-inode entries */ | |
157 | int isdot; /* entry is "." */ | |
158 | int isdotdot; /* entry is ".." */ | |
159 | xfs_mount_t *mp; /* mount structure pointer */ | |
160 | int namelen; /* total name bytes */ | |
5bde1ba9 | 161 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 LT |
162 | int size=0; /* total computed size */ |
163 | ||
164 | mp = dp->i_mount; | |
165 | ||
166 | count = i8count = namelen = 0; | |
4f6ae1a4 | 167 | btp = xfs_dir2_block_tail_p(mp, hdr); |
bbaaf538 | 168 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
169 | |
170 | /* | |
171 | * Iterate over the block's data entries by using the leaf pointers. | |
172 | */ | |
e922fffa | 173 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 174 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
175 | continue; |
176 | /* | |
177 | * Calculate the pointer to the entry at hand. | |
178 | */ | |
179 | dep = (xfs_dir2_data_entry_t *) | |
4f6ae1a4 | 180 | ((char *)hdr + xfs_dir2_dataptr_to_off(mp, addr)); |
1da177e4 LT |
181 | /* |
182 | * Detect . and .., so we can special-case them. | |
183 | * . is not included in sf directories. | |
184 | * .. is included by just the parent inode number. | |
185 | */ | |
186 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
187 | isdotdot = | |
188 | dep->namelen == 2 && | |
189 | dep->name[0] == '.' && dep->name[1] == '.'; | |
190 | #if XFS_BIG_INUMS | |
191 | if (!isdot) | |
ff9901c1 | 192 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
1da177e4 LT |
193 | #endif |
194 | if (!isdot && !isdotdot) { | |
195 | count++; | |
196 | namelen += dep->namelen; | |
197 | } else if (isdotdot) | |
ff9901c1 | 198 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
199 | /* |
200 | * Calculate the new size, see if we should give up yet. | |
201 | */ | |
bbaaf538 | 202 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
203 | count + /* namelen */ |
204 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
205 | namelen + /* name */ | |
206 | (i8count ? /* inumber */ | |
207 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
208 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
209 | if (size > XFS_IFORK_DSIZE(dp)) | |
210 | return size; /* size value is a failure */ | |
211 | } | |
212 | /* | |
213 | * Create the output header, if it worked. | |
214 | */ | |
215 | sfhp->count = count; | |
216 | sfhp->i8count = i8count; | |
ac8ba50f | 217 | xfs_dir2_sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
218 | return size; |
219 | } | |
220 | ||
221 | /* | |
222 | * Convert a block format directory to shortform. | |
223 | * Caller has already checked that it will fit, and built us a header. | |
224 | */ | |
225 | int /* error */ | |
226 | xfs_dir2_block_to_sf( | |
227 | xfs_da_args_t *args, /* operation arguments */ | |
228 | xfs_dabuf_t *bp, /* block buffer */ | |
229 | int size, /* shortform directory size */ | |
230 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
231 | { | |
a64b0417 | 232 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
233 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
234 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
235 | xfs_inode_t *dp; /* incore directory inode */ | |
236 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
237 | char *endptr; /* end of data entries */ | |
238 | int error; /* error return value */ | |
239 | int logflags; /* inode logging flags */ | |
240 | xfs_mount_t *mp; /* filesystem mount point */ | |
241 | char *ptr; /* current data pointer */ | |
242 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 243 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
1da177e4 | 244 | |
0b1b213f CH |
245 | trace_xfs_dir2_block_to_sf(args); |
246 | ||
1da177e4 LT |
247 | dp = args->dp; |
248 | mp = dp->i_mount; | |
249 | ||
250 | /* | |
251 | * Make a copy of the block data, so we can shrink the inode | |
252 | * and add local data. | |
253 | */ | |
a64b0417 CH |
254 | hdr = kmem_alloc(mp->m_dirblksize, KM_SLEEP); |
255 | memcpy(hdr, bp->data, mp->m_dirblksize); | |
1da177e4 LT |
256 | logflags = XFS_ILOG_CORE; |
257 | if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) { | |
258 | ASSERT(error != ENOSPC); | |
259 | goto out; | |
260 | } | |
4f6ae1a4 | 261 | |
1da177e4 LT |
262 | /* |
263 | * The buffer is now unconditionally gone, whether | |
264 | * xfs_dir2_shrink_inode worked or not. | |
265 | * | |
266 | * Convert the inode to local format. | |
267 | */ | |
268 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
269 | dp->i_df.if_flags |= XFS_IFINLINE; | |
270 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
271 | ASSERT(dp->i_df.if_bytes == 0); | |
272 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
273 | logflags |= XFS_ILOG_DDATA; | |
274 | /* | |
275 | * Copy the header into the newly allocate local space. | |
276 | */ | |
ac8ba50f | 277 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
bbaaf538 | 278 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
1da177e4 LT |
279 | dp->i_d.di_size = size; |
280 | /* | |
281 | * Set up to loop over the block's entries. | |
282 | */ | |
a64b0417 CH |
283 | btp = xfs_dir2_block_tail_p(mp, hdr); |
284 | ptr = (char *)(hdr + 1); | |
bbaaf538 CH |
285 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
286 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
287 | /* |
288 | * Loop over the active and unused entries. | |
289 | * Stop when we reach the leaf/tail portion of the block. | |
290 | */ | |
291 | while (ptr < endptr) { | |
292 | /* | |
293 | * If it's unused, just skip over it. | |
294 | */ | |
295 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
296 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
297 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
298 | continue; |
299 | } | |
300 | dep = (xfs_dir2_data_entry_t *)ptr; | |
301 | /* | |
302 | * Skip . | |
303 | */ | |
304 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 305 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
306 | /* |
307 | * Skip .., but make sure the inode number is right. | |
308 | */ | |
309 | else if (dep->namelen == 2 && | |
310 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 311 | ASSERT(be64_to_cpu(dep->inumber) == |
8bc38787 | 312 | xfs_dir2_sf_get_parent_ino(sfp)); |
1da177e4 LT |
313 | /* |
314 | * Normal entry, copy it into shortform. | |
315 | */ | |
316 | else { | |
317 | sfep->namelen = dep->namelen; | |
bbaaf538 | 318 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 319 | (xfs_dir2_data_aoff_t) |
a64b0417 | 320 | ((char *)dep - (char *)hdr)); |
1da177e4 | 321 | memcpy(sfep->name, dep->name, dep->namelen); |
8bc38787 CH |
322 | xfs_dir2_sfe_put_ino(sfp, sfep, |
323 | be64_to_cpu(dep->inumber)); | |
324 | ||
bbaaf538 | 325 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); |
1da177e4 | 326 | } |
bbaaf538 | 327 | ptr += xfs_dir2_data_entsize(dep->namelen); |
1da177e4 LT |
328 | } |
329 | ASSERT((char *)sfep - (char *)sfp == size); | |
330 | xfs_dir2_sf_check(args); | |
331 | out: | |
332 | xfs_trans_log_inode(args->trans, dp, logflags); | |
a64b0417 | 333 | kmem_free(hdr); |
1da177e4 LT |
334 | return error; |
335 | } | |
336 | ||
337 | /* | |
338 | * Add a name to a shortform directory. | |
339 | * There are two algorithms, "easy" and "hard" which we decide on | |
340 | * before changing anything. | |
341 | * Convert to block form if necessary, if the new entry won't fit. | |
342 | */ | |
343 | int /* error */ | |
344 | xfs_dir2_sf_addname( | |
345 | xfs_da_args_t *args) /* operation arguments */ | |
346 | { | |
347 | int add_entsize; /* size of the new entry */ | |
348 | xfs_inode_t *dp; /* incore directory inode */ | |
349 | int error; /* error return value */ | |
350 | int incr_isize; /* total change in size */ | |
351 | int new_isize; /* di_size after adding name */ | |
352 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 353 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 LT |
354 | int old_isize; /* di_size before adding name */ |
355 | int pick; /* which algorithm to use */ | |
ac8ba50f | 356 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 357 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 358 | |
0b1b213f CH |
359 | trace_xfs_dir2_sf_addname(args); |
360 | ||
1da177e4 LT |
361 | ASSERT(xfs_dir2_sf_lookup(args) == ENOENT); |
362 | dp = args->dp; | |
363 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
364 | /* | |
365 | * Make sure the shortform value has some of its header. | |
366 | */ | |
367 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
368 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
369 | return XFS_ERROR(EIO); | |
370 | } | |
371 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
372 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
373 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
374 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
375 | /* |
376 | * Compute entry (and change in) size. | |
377 | */ | |
78f70cd7 | 378 | add_entsize = xfs_dir2_sf_entsize(sfp, args->namelen); |
1da177e4 LT |
379 | incr_isize = add_entsize; |
380 | objchange = 0; | |
381 | #if XFS_BIG_INUMS | |
382 | /* | |
383 | * Do we have to change to 8 byte inodes? | |
384 | */ | |
ac8ba50f | 385 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
386 | /* |
387 | * Yes, adjust the entry size and the total size. | |
388 | */ | |
389 | add_entsize += | |
390 | (uint)sizeof(xfs_dir2_ino8_t) - | |
391 | (uint)sizeof(xfs_dir2_ino4_t); | |
392 | incr_isize += | |
ac8ba50f | 393 | (sfp->count + 2) * |
1da177e4 LT |
394 | ((uint)sizeof(xfs_dir2_ino8_t) - |
395 | (uint)sizeof(xfs_dir2_ino4_t)); | |
396 | objchange = 1; | |
397 | } | |
398 | #endif | |
399 | old_isize = (int)dp->i_d.di_size; | |
400 | new_isize = old_isize + incr_isize; | |
401 | /* | |
402 | * Won't fit as shortform any more (due to size), | |
403 | * or the pick routine says it won't (due to offset values). | |
404 | */ | |
405 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
406 | (pick = | |
407 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
408 | /* | |
409 | * Just checking or no space reservation, it doesn't fit. | |
410 | */ | |
6a178100 | 411 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
1da177e4 LT |
412 | return XFS_ERROR(ENOSPC); |
413 | /* | |
414 | * Convert to block form then add the name. | |
415 | */ | |
416 | error = xfs_dir2_sf_to_block(args); | |
417 | if (error) | |
418 | return error; | |
419 | return xfs_dir2_block_addname(args); | |
420 | } | |
421 | /* | |
422 | * Just checking, it fits. | |
423 | */ | |
6a178100 | 424 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
425 | return 0; |
426 | /* | |
427 | * Do it the easy way - just add it at the end. | |
428 | */ | |
429 | if (pick == 1) | |
430 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
431 | /* | |
432 | * Do it the hard way - look for a place to insert the new entry. | |
433 | * Convert to 8 byte inode numbers first if necessary. | |
434 | */ | |
435 | else { | |
436 | ASSERT(pick == 2); | |
437 | #if XFS_BIG_INUMS | |
438 | if (objchange) | |
439 | xfs_dir2_sf_toino8(args); | |
440 | #endif | |
441 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); | |
442 | } | |
443 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Add the new entry the "easy" way. | |
449 | * This is copying the old directory and adding the new entry at the end. | |
450 | * Since it's sorted by "offset" we need room after the last offset | |
451 | * that's already there, and then room to convert to a block directory. | |
452 | * This is already checked by the pick routine. | |
453 | */ | |
454 | static void | |
455 | xfs_dir2_sf_addname_easy( | |
456 | xfs_da_args_t *args, /* operation arguments */ | |
457 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
458 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
459 | int new_isize) /* new directory size */ | |
460 | { | |
461 | int byteoff; /* byte offset in sf dir */ | |
462 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 463 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
464 | |
465 | dp = args->dp; | |
466 | ||
ac8ba50f | 467 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
468 | byteoff = (int)((char *)sfep - (char *)sfp); |
469 | /* | |
470 | * Grow the in-inode space. | |
471 | */ | |
78f70cd7 | 472 | xfs_idata_realloc(dp, xfs_dir2_sf_entsize(sfp, args->namelen), |
1da177e4 LT |
473 | XFS_DATA_FORK); |
474 | /* | |
475 | * Need to set up again due to realloc of the inode data. | |
476 | */ | |
ac8ba50f | 477 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
478 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
479 | /* | |
480 | * Fill in the new entry. | |
481 | */ | |
482 | sfep->namelen = args->namelen; | |
bbaaf538 | 483 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 484 | memcpy(sfep->name, args->name, sfep->namelen); |
8bc38787 | 485 | xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); |
1da177e4 LT |
486 | /* |
487 | * Update the header and inode. | |
488 | */ | |
ac8ba50f | 489 | sfp->count++; |
1da177e4 LT |
490 | #if XFS_BIG_INUMS |
491 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) | |
ac8ba50f | 492 | sfp->i8count++; |
1da177e4 LT |
493 | #endif |
494 | dp->i_d.di_size = new_isize; | |
495 | xfs_dir2_sf_check(args); | |
496 | } | |
497 | ||
498 | /* | |
499 | * Add the new entry the "hard" way. | |
500 | * The caller has already converted to 8 byte inode numbers if necessary, | |
501 | * in which case we need to leave the i8count at 1. | |
502 | * Find a hole that the new entry will fit into, and copy | |
503 | * the first part of the entries, the new entry, and the last part of | |
504 | * the entries. | |
505 | */ | |
506 | /* ARGSUSED */ | |
507 | static void | |
508 | xfs_dir2_sf_addname_hard( | |
509 | xfs_da_args_t *args, /* operation arguments */ | |
510 | int objchange, /* changing inode number size */ | |
511 | int new_isize) /* new directory size */ | |
512 | { | |
513 | int add_datasize; /* data size need for new ent */ | |
514 | char *buf; /* buffer for old */ | |
515 | xfs_inode_t *dp; /* incore directory inode */ | |
516 | int eof; /* reached end of old dir */ | |
517 | int nbytes; /* temp for byte copies */ | |
518 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
519 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
520 | int old_isize; /* previous di_size */ | |
521 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 522 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 523 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 524 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
1da177e4 LT |
525 | |
526 | /* | |
527 | * Copy the old directory to the stack buffer. | |
528 | */ | |
529 | dp = args->dp; | |
530 | ||
ac8ba50f | 531 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
532 | old_isize = (int)dp->i_d.di_size; |
533 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 534 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
535 | memcpy(oldsfp, sfp, old_isize); |
536 | /* | |
537 | * Loop over the old directory finding the place we're going | |
538 | * to insert the new entry. | |
539 | * If it's going to end up at the end then oldsfep will point there. | |
540 | */ | |
541 | for (offset = XFS_DIR2_DATA_FIRST_OFFSET, | |
bbaaf538 CH |
542 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
543 | add_datasize = xfs_dir2_data_entsize(args->namelen), | |
1da177e4 LT |
544 | eof = (char *)oldsfep == &buf[old_isize]; |
545 | !eof; | |
bbaaf538 CH |
546 | offset = new_offset + xfs_dir2_data_entsize(oldsfep->namelen), |
547 | oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep), | |
1da177e4 | 548 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 549 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
550 | if (offset + add_datasize <= new_offset) |
551 | break; | |
552 | } | |
553 | /* | |
554 | * Get rid of the old directory, then allocate space for | |
555 | * the new one. We do this so xfs_idata_realloc won't copy | |
556 | * the data. | |
557 | */ | |
558 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
559 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
560 | /* | |
561 | * Reset the pointer since the buffer was reallocated. | |
562 | */ | |
ac8ba50f | 563 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
564 | /* |
565 | * Copy the first part of the directory, including the header. | |
566 | */ | |
567 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
568 | memcpy(sfp, oldsfp, nbytes); | |
569 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
570 | /* | |
571 | * Fill in the new entry, and update the header counts. | |
572 | */ | |
573 | sfep->namelen = args->namelen; | |
bbaaf538 | 574 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 575 | memcpy(sfep->name, args->name, sfep->namelen); |
8bc38787 | 576 | xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); |
ac8ba50f | 577 | sfp->count++; |
1da177e4 LT |
578 | #if XFS_BIG_INUMS |
579 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) | |
ac8ba50f | 580 | sfp->i8count++; |
1da177e4 LT |
581 | #endif |
582 | /* | |
583 | * If there's more left to copy, do that. | |
584 | */ | |
585 | if (!eof) { | |
bbaaf538 | 586 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); |
1da177e4 LT |
587 | memcpy(sfep, oldsfep, old_isize - nbytes); |
588 | } | |
f0e2d93c | 589 | kmem_free(buf); |
1da177e4 LT |
590 | dp->i_d.di_size = new_isize; |
591 | xfs_dir2_sf_check(args); | |
592 | } | |
593 | ||
594 | /* | |
595 | * Decide if the new entry will fit at all. | |
596 | * If it will fit, pick between adding the new entry to the end (easy) | |
597 | * or somewhere else (hard). | |
598 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
599 | */ | |
600 | /*ARGSUSED*/ | |
601 | static int /* pick result */ | |
602 | xfs_dir2_sf_addname_pick( | |
603 | xfs_da_args_t *args, /* operation arguments */ | |
604 | int objchange, /* inode # size changes */ | |
605 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
606 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
607 | { | |
608 | xfs_inode_t *dp; /* incore directory inode */ | |
609 | int holefit; /* found hole it will fit in */ | |
610 | int i; /* entry number */ | |
611 | xfs_mount_t *mp; /* filesystem mount point */ | |
612 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
613 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 614 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
615 | int size; /* entry's data size */ |
616 | int used; /* data bytes used */ | |
617 | ||
618 | dp = args->dp; | |
619 | mp = dp->i_mount; | |
620 | ||
ac8ba50f | 621 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
bbaaf538 | 622 | size = xfs_dir2_data_entsize(args->namelen); |
1da177e4 | 623 | offset = XFS_DIR2_DATA_FIRST_OFFSET; |
bbaaf538 | 624 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
625 | holefit = 0; |
626 | /* | |
627 | * Loop over sf entries. | |
628 | * Keep track of data offset and whether we've seen a place | |
629 | * to insert the new entry. | |
630 | */ | |
ac8ba50f | 631 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 632 | if (!holefit) |
bbaaf538 CH |
633 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
634 | offset = xfs_dir2_sf_get_offset(sfep) + | |
635 | xfs_dir2_data_entsize(sfep->namelen); | |
636 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); | |
1da177e4 LT |
637 | } |
638 | /* | |
639 | * Calculate data bytes used excluding the new entry, if this | |
640 | * was a data block (block form directory). | |
641 | */ | |
642 | used = offset + | |
ac8ba50f | 643 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
644 | (uint)sizeof(xfs_dir2_block_tail_t); |
645 | /* | |
646 | * If it won't fit in a block form then we can't insert it, | |
647 | * we'll go back, convert to block, then try the insert and convert | |
648 | * to leaf. | |
649 | */ | |
650 | if (used + (holefit ? 0 : size) > mp->m_dirblksize) | |
651 | return 0; | |
652 | /* | |
653 | * If changing the inode number size, do it the hard way. | |
654 | */ | |
655 | #if XFS_BIG_INUMS | |
656 | if (objchange) { | |
657 | return 2; | |
658 | } | |
659 | #else | |
660 | ASSERT(objchange == 0); | |
661 | #endif | |
662 | /* | |
663 | * If it won't fit at the end then do it the hard way (use the hole). | |
664 | */ | |
665 | if (used + size > mp->m_dirblksize) | |
666 | return 2; | |
667 | /* | |
668 | * Do it the easy way. | |
669 | */ | |
670 | *sfepp = sfep; | |
671 | *offsetp = offset; | |
672 | return 1; | |
673 | } | |
674 | ||
675 | #ifdef DEBUG | |
676 | /* | |
677 | * Check consistency of shortform directory, assert if bad. | |
678 | */ | |
679 | static void | |
680 | xfs_dir2_sf_check( | |
681 | xfs_da_args_t *args) /* operation arguments */ | |
682 | { | |
683 | xfs_inode_t *dp; /* incore directory inode */ | |
684 | int i; /* entry number */ | |
685 | int i8count; /* number of big inode#s */ | |
686 | xfs_ino_t ino; /* entry inode number */ | |
687 | int offset; /* data offset */ | |
688 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 689 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
690 | |
691 | dp = args->dp; | |
692 | ||
ac8ba50f | 693 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 | 694 | offset = XFS_DIR2_DATA_FIRST_OFFSET; |
8bc38787 | 695 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
1da177e4 LT |
696 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
697 | ||
bbaaf538 | 698 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 699 | i < sfp->count; |
bbaaf538 CH |
700 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
701 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); | |
8bc38787 | 702 | ino = xfs_dir2_sfe_get_ino(sfp, sfep); |
1da177e4 LT |
703 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
704 | offset = | |
bbaaf538 CH |
705 | xfs_dir2_sf_get_offset(sfep) + |
706 | xfs_dir2_data_entsize(sfep->namelen); | |
1da177e4 | 707 | } |
ac8ba50f | 708 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
709 | ASSERT(XFS_BIG_INUMS || i8count == 0); |
710 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); | |
711 | ASSERT(offset + | |
ac8ba50f | 712 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
713 | (uint)sizeof(xfs_dir2_block_tail_t) <= |
714 | dp->i_mount->m_dirblksize); | |
715 | } | |
716 | #endif /* DEBUG */ | |
717 | ||
718 | /* | |
719 | * Create a new (shortform) directory. | |
720 | */ | |
721 | int /* error, always 0 */ | |
722 | xfs_dir2_sf_create( | |
723 | xfs_da_args_t *args, /* operation arguments */ | |
724 | xfs_ino_t pino) /* parent inode number */ | |
725 | { | |
726 | xfs_inode_t *dp; /* incore directory inode */ | |
727 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 728 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
729 | int size; /* directory size */ |
730 | ||
0b1b213f CH |
731 | trace_xfs_dir2_sf_create(args); |
732 | ||
1da177e4 LT |
733 | dp = args->dp; |
734 | ||
735 | ASSERT(dp != NULL); | |
736 | ASSERT(dp->i_d.di_size == 0); | |
737 | /* | |
738 | * If it's currently a zero-length extent file, | |
739 | * convert it to local format. | |
740 | */ | |
741 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
742 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
743 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
744 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
745 | dp->i_df.if_flags |= XFS_IFINLINE; | |
746 | } | |
747 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
748 | ASSERT(dp->i_df.if_bytes == 0); | |
749 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 750 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
751 | /* |
752 | * Make a buffer for the data. | |
753 | */ | |
754 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
755 | /* | |
756 | * Fill in the header, | |
757 | */ | |
ac8ba50f CH |
758 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
759 | sfp->i8count = i8count; | |
1da177e4 LT |
760 | /* |
761 | * Now can put in the inode number, since i8count is set. | |
762 | */ | |
8bc38787 | 763 | xfs_dir2_sf_put_parent_ino(sfp, pino); |
ac8ba50f | 764 | sfp->count = 0; |
1da177e4 LT |
765 | dp->i_d.di_size = size; |
766 | xfs_dir2_sf_check(args); | |
767 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | int /* error */ | |
772 | xfs_dir2_sf_getdents( | |
773 | xfs_inode_t *dp, /* incore directory inode */ | |
051e7cd4 CH |
774 | void *dirent, |
775 | xfs_off_t *offset, | |
776 | filldir_t filldir) | |
1da177e4 | 777 | { |
1da177e4 LT |
778 | int i; /* shortform entry number */ |
779 | xfs_mount_t *mp; /* filesystem mount point */ | |
780 | xfs_dir2_dataptr_t off; /* current entry's offset */ | |
1da177e4 | 781 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 782 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
051e7cd4 CH |
783 | xfs_dir2_dataptr_t dot_offset; |
784 | xfs_dir2_dataptr_t dotdot_offset; | |
785 | xfs_ino_t ino; | |
1da177e4 LT |
786 | |
787 | mp = dp->i_mount; | |
788 | ||
789 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
790 | /* | |
791 | * Give up if the directory is way too short. | |
792 | */ | |
793 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
794 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
795 | return XFS_ERROR(EIO); | |
796 | } | |
797 | ||
1da177e4 LT |
798 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); |
799 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
800 | ||
ac8ba50f | 801 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 | 802 | |
ac8ba50f | 803 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); |
1da177e4 LT |
804 | |
805 | /* | |
806 | * If the block number in the offset is out of range, we're done. | |
807 | */ | |
051e7cd4 | 808 | if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk) |
1da177e4 | 809 | return 0; |
1da177e4 LT |
810 | |
811 | /* | |
051e7cd4 CH |
812 | * Precalculate offsets for . and .. as we will always need them. |
813 | * | |
814 | * XXX(hch): the second argument is sometimes 0 and sometimes | |
815 | * mp->m_dirdatablk. | |
1da177e4 | 816 | */ |
051e7cd4 CH |
817 | dot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, |
818 | XFS_DIR2_DATA_DOT_OFFSET); | |
819 | dotdot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, | |
820 | XFS_DIR2_DATA_DOTDOT_OFFSET); | |
821 | ||
1da177e4 LT |
822 | /* |
823 | * Put . entry unless we're starting past it. | |
824 | */ | |
051e7cd4 | 825 | if (*offset <= dot_offset) { |
a19d9f88 | 826 | if (filldir(dirent, ".", 1, dot_offset & 0x7fffffff, dp->i_ino, DT_DIR)) { |
15440319 | 827 | *offset = dot_offset & 0x7fffffff; |
051e7cd4 | 828 | return 0; |
1da177e4 LT |
829 | } |
830 | } | |
831 | ||
832 | /* | |
833 | * Put .. entry unless we're starting past it. | |
834 | */ | |
051e7cd4 | 835 | if (*offset <= dotdot_offset) { |
8bc38787 | 836 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
15440319 CH |
837 | if (filldir(dirent, "..", 2, dotdot_offset & 0x7fffffff, ino, DT_DIR)) { |
838 | *offset = dotdot_offset & 0x7fffffff; | |
051e7cd4 | 839 | return 0; |
1da177e4 LT |
840 | } |
841 | } | |
842 | ||
843 | /* | |
844 | * Loop while there are more entries and put'ing works. | |
845 | */ | |
051e7cd4 | 846 | sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 847 | for (i = 0; i < sfp->count; i++) { |
bbaaf538 CH |
848 | off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, |
849 | xfs_dir2_sf_get_offset(sfep)); | |
1da177e4 | 850 | |
051e7cd4 CH |
851 | if (*offset > off) { |
852 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); | |
1da177e4 | 853 | continue; |
051e7cd4 | 854 | } |
1da177e4 | 855 | |
8bc38787 | 856 | ino = xfs_dir2_sfe_get_ino(sfp, sfep); |
4a24cb71 | 857 | if (filldir(dirent, (char *)sfep->name, sfep->namelen, |
15440319 CH |
858 | off & 0x7fffffff, ino, DT_UNKNOWN)) { |
859 | *offset = off & 0x7fffffff; | |
051e7cd4 | 860 | return 0; |
1da177e4 | 861 | } |
051e7cd4 | 862 | sfep = xfs_dir2_sf_nextentry(sfp, sfep); |
1da177e4 LT |
863 | } |
864 | ||
15440319 CH |
865 | *offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0) & |
866 | 0x7fffffff; | |
1da177e4 LT |
867 | return 0; |
868 | } | |
869 | ||
870 | /* | |
871 | * Lookup an entry in a shortform directory. | |
872 | * Returns EEXIST if found, ENOENT if not found. | |
873 | */ | |
874 | int /* error */ | |
875 | xfs_dir2_sf_lookup( | |
876 | xfs_da_args_t *args) /* operation arguments */ | |
877 | { | |
878 | xfs_inode_t *dp; /* incore directory inode */ | |
879 | int i; /* entry index */ | |
384f3ced | 880 | int error; |
1da177e4 | 881 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 882 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 883 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 884 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 885 | |
0b1b213f CH |
886 | trace_xfs_dir2_sf_lookup(args); |
887 | ||
1da177e4 LT |
888 | xfs_dir2_sf_check(args); |
889 | dp = args->dp; | |
890 | ||
891 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
892 | /* | |
893 | * Bail out if the directory is way too short. | |
894 | */ | |
895 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
896 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
897 | return XFS_ERROR(EIO); | |
898 | } | |
899 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
900 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
901 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
902 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
903 | /* |
904 | * Special case for . | |
905 | */ | |
906 | if (args->namelen == 1 && args->name[0] == '.') { | |
907 | args->inumber = dp->i_ino; | |
5163f95a | 908 | args->cmpresult = XFS_CMP_EXACT; |
1da177e4 LT |
909 | return XFS_ERROR(EEXIST); |
910 | } | |
911 | /* | |
912 | * Special case for .. | |
913 | */ | |
914 | if (args->namelen == 2 && | |
915 | args->name[0] == '.' && args->name[1] == '.') { | |
8bc38787 | 916 | args->inumber = xfs_dir2_sf_get_parent_ino(sfp); |
5163f95a | 917 | args->cmpresult = XFS_CMP_EXACT; |
1da177e4 LT |
918 | return XFS_ERROR(EEXIST); |
919 | } | |
920 | /* | |
921 | * Loop over all the entries trying to match ours. | |
922 | */ | |
384f3ced | 923 | ci_sfep = NULL; |
ac8ba50f | 924 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
5163f95a BN |
925 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
926 | /* | |
927 | * Compare name and if it's an exact match, return the inode | |
928 | * number. If it's the first case-insensitive match, store the | |
929 | * inode number and continue looking for an exact match. | |
930 | */ | |
931 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
932 | sfep->namelen); | |
933 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
934 | args->cmpresult = cmp; | |
8bc38787 | 935 | args->inumber = xfs_dir2_sfe_get_ino(sfp, sfep); |
5163f95a BN |
936 | if (cmp == XFS_CMP_EXACT) |
937 | return XFS_ERROR(EEXIST); | |
384f3ced | 938 | ci_sfep = sfep; |
1da177e4 LT |
939 | } |
940 | } | |
6a178100 | 941 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
942 | /* |
943 | * Here, we can only be doing a lookup (not a rename or replace). | |
384f3ced | 944 | * If a case-insensitive match was not found, return ENOENT. |
5163f95a | 945 | */ |
384f3ced BN |
946 | if (!ci_sfep) |
947 | return XFS_ERROR(ENOENT); | |
948 | /* otherwise process the CI match as required by the caller */ | |
949 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
950 | return XFS_ERROR(error); | |
1da177e4 LT |
951 | } |
952 | ||
953 | /* | |
954 | * Remove an entry from a shortform directory. | |
955 | */ | |
956 | int /* error */ | |
957 | xfs_dir2_sf_removename( | |
958 | xfs_da_args_t *args) | |
959 | { | |
960 | int byteoff; /* offset of removed entry */ | |
961 | xfs_inode_t *dp; /* incore directory inode */ | |
962 | int entsize; /* this entry's size */ | |
963 | int i; /* shortform entry index */ | |
964 | int newsize; /* new inode size */ | |
965 | int oldsize; /* old inode size */ | |
966 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 967 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 968 | |
0b1b213f CH |
969 | trace_xfs_dir2_sf_removename(args); |
970 | ||
1da177e4 LT |
971 | dp = args->dp; |
972 | ||
973 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
974 | oldsize = (int)dp->i_d.di_size; | |
975 | /* | |
976 | * Bail out if the directory is way too short. | |
977 | */ | |
978 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
979 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
980 | return XFS_ERROR(EIO); | |
981 | } | |
982 | ASSERT(dp->i_df.if_bytes == oldsize); | |
983 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
984 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
985 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
986 | /* |
987 | * Loop over the old directory entries. | |
988 | * Find the one we're deleting. | |
989 | */ | |
ac8ba50f | 990 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
5163f95a BN |
991 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
992 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == | |
993 | XFS_CMP_EXACT) { | |
8bc38787 CH |
994 | ASSERT(xfs_dir2_sfe_get_ino(sfp, sfep) == |
995 | args->inumber); | |
1da177e4 LT |
996 | break; |
997 | } | |
998 | } | |
999 | /* | |
1000 | * Didn't find it. | |
1001 | */ | |
ac8ba50f | 1002 | if (i == sfp->count) |
1da177e4 | 1003 | return XFS_ERROR(ENOENT); |
1da177e4 LT |
1004 | /* |
1005 | * Calculate sizes. | |
1006 | */ | |
1007 | byteoff = (int)((char *)sfep - (char *)sfp); | |
78f70cd7 | 1008 | entsize = xfs_dir2_sf_entsize(sfp, args->namelen); |
1da177e4 LT |
1009 | newsize = oldsize - entsize; |
1010 | /* | |
1011 | * Copy the part if any after the removed entry, sliding it down. | |
1012 | */ | |
1013 | if (byteoff + entsize < oldsize) | |
1014 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
1015 | oldsize - (byteoff + entsize)); | |
1016 | /* | |
1017 | * Fix up the header and file size. | |
1018 | */ | |
ac8ba50f | 1019 | sfp->count--; |
1da177e4 LT |
1020 | dp->i_d.di_size = newsize; |
1021 | /* | |
1022 | * Reallocate, making it smaller. | |
1023 | */ | |
1024 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 1025 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
1026 | #if XFS_BIG_INUMS |
1027 | /* | |
1028 | * Are we changing inode number size? | |
1029 | */ | |
1030 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 1031 | if (sfp->i8count == 1) |
1da177e4 LT |
1032 | xfs_dir2_sf_toino4(args); |
1033 | else | |
ac8ba50f | 1034 | sfp->i8count--; |
1da177e4 LT |
1035 | } |
1036 | #endif | |
1037 | xfs_dir2_sf_check(args); | |
1038 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Replace the inode number of an entry in a shortform directory. | |
1044 | */ | |
1045 | int /* error */ | |
1046 | xfs_dir2_sf_replace( | |
1047 | xfs_da_args_t *args) /* operation arguments */ | |
1048 | { | |
1049 | xfs_inode_t *dp; /* incore directory inode */ | |
1050 | int i; /* entry index */ | |
1051 | #if XFS_BIG_INUMS || defined(DEBUG) | |
1052 | xfs_ino_t ino=0; /* entry old inode number */ | |
1053 | #endif | |
1054 | #if XFS_BIG_INUMS | |
1055 | int i8elevated; /* sf_toino8 set i8count=1 */ | |
1056 | #endif | |
1057 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 1058 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 1059 | |
0b1b213f CH |
1060 | trace_xfs_dir2_sf_replace(args); |
1061 | ||
1da177e4 LT |
1062 | dp = args->dp; |
1063 | ||
1064 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
1065 | /* | |
1066 | * Bail out if the shortform directory is way too small. | |
1067 | */ | |
1068 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
1069 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
1070 | return XFS_ERROR(EIO); | |
1071 | } | |
1072 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
1073 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
1074 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1075 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
1076 | #if XFS_BIG_INUMS |
1077 | /* | |
1078 | * New inode number is large, and need to convert to 8-byte inodes. | |
1079 | */ | |
ac8ba50f | 1080 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
1081 | int error; /* error return value */ |
1082 | int newsize; /* new inode size */ | |
1083 | ||
1084 | newsize = | |
1085 | dp->i_df.if_bytes + | |
ac8ba50f | 1086 | (sfp->count + 1) * |
1da177e4 LT |
1087 | ((uint)sizeof(xfs_dir2_ino8_t) - |
1088 | (uint)sizeof(xfs_dir2_ino4_t)); | |
1089 | /* | |
1090 | * Won't fit as shortform, convert to block then do replace. | |
1091 | */ | |
1092 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
1093 | error = xfs_dir2_sf_to_block(args); | |
1094 | if (error) { | |
1095 | return error; | |
1096 | } | |
1097 | return xfs_dir2_block_replace(args); | |
1098 | } | |
1099 | /* | |
1100 | * Still fits, convert to 8-byte now. | |
1101 | */ | |
1102 | xfs_dir2_sf_toino8(args); | |
1103 | i8elevated = 1; | |
ac8ba50f | 1104 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
1105 | } else |
1106 | i8elevated = 0; | |
1107 | #endif | |
1108 | ASSERT(args->namelen != 1 || args->name[0] != '.'); | |
1109 | /* | |
1110 | * Replace ..'s entry. | |
1111 | */ | |
1112 | if (args->namelen == 2 && | |
1113 | args->name[0] == '.' && args->name[1] == '.') { | |
1114 | #if XFS_BIG_INUMS || defined(DEBUG) | |
8bc38787 | 1115 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
1da177e4 LT |
1116 | ASSERT(args->inumber != ino); |
1117 | #endif | |
8bc38787 | 1118 | xfs_dir2_sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
1119 | } |
1120 | /* | |
1121 | * Normal entry, look for the name. | |
1122 | */ | |
1123 | else { | |
bbaaf538 | 1124 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 1125 | i < sfp->count; |
5163f95a BN |
1126 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { |
1127 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == | |
1128 | XFS_CMP_EXACT) { | |
1da177e4 | 1129 | #if XFS_BIG_INUMS || defined(DEBUG) |
8bc38787 | 1130 | ino = xfs_dir2_sfe_get_ino(sfp, sfep); |
1da177e4 LT |
1131 | ASSERT(args->inumber != ino); |
1132 | #endif | |
8bc38787 | 1133 | xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); |
1da177e4 LT |
1134 | break; |
1135 | } | |
1136 | } | |
1137 | /* | |
1138 | * Didn't find it. | |
1139 | */ | |
ac8ba50f | 1140 | if (i == sfp->count) { |
6a178100 | 1141 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
1142 | #if XFS_BIG_INUMS |
1143 | if (i8elevated) | |
1144 | xfs_dir2_sf_toino4(args); | |
1145 | #endif | |
1146 | return XFS_ERROR(ENOENT); | |
1147 | } | |
1148 | } | |
1149 | #if XFS_BIG_INUMS | |
1150 | /* | |
1151 | * See if the old number was large, the new number is small. | |
1152 | */ | |
1153 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
1154 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
1155 | /* | |
1156 | * And the old count was one, so need to convert to small. | |
1157 | */ | |
ac8ba50f | 1158 | if (sfp->i8count == 1) |
1da177e4 LT |
1159 | xfs_dir2_sf_toino4(args); |
1160 | else | |
ac8ba50f | 1161 | sfp->i8count--; |
1da177e4 LT |
1162 | } |
1163 | /* | |
1164 | * See if the old number was small, the new number is large. | |
1165 | */ | |
1166 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
1167 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
1168 | /* | |
1169 | * add to the i8count unless we just converted to 8-byte | |
1170 | * inodes (which does an implied i8count = 1) | |
1171 | */ | |
ac8ba50f | 1172 | ASSERT(sfp->i8count != 0); |
1da177e4 | 1173 | if (!i8elevated) |
ac8ba50f | 1174 | sfp->i8count++; |
1da177e4 LT |
1175 | } |
1176 | #endif | |
1177 | xfs_dir2_sf_check(args); | |
1178 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | #if XFS_BIG_INUMS | |
1183 | /* | |
1184 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1185 | * The last 8-byte inode number is gone, but the count is still 1. | |
1186 | */ | |
1187 | static void | |
1188 | xfs_dir2_sf_toino4( | |
1189 | xfs_da_args_t *args) /* operation arguments */ | |
1190 | { | |
1191 | char *buf; /* old dir's buffer */ | |
1192 | xfs_inode_t *dp; /* incore directory inode */ | |
1193 | int i; /* entry index */ | |
1da177e4 LT |
1194 | int newsize; /* new inode size */ |
1195 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1196 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1197 | int oldsize; /* old inode size */ |
1198 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1199 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1200 | |
0b1b213f CH |
1201 | trace_xfs_dir2_sf_toino4(args); |
1202 | ||
1da177e4 LT |
1203 | dp = args->dp; |
1204 | ||
1205 | /* | |
1206 | * Copy the old directory to the buffer. | |
1207 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1208 | * Don't want xfs_idata_realloc copying the data here. | |
1209 | */ | |
1210 | oldsize = dp->i_df.if_bytes; | |
1211 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1212 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1213 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1214 | memcpy(buf, oldsfp, oldsize); |
1215 | /* | |
1216 | * Compute the new inode size. | |
1217 | */ | |
1218 | newsize = | |
1219 | oldsize - | |
ac8ba50f | 1220 | (oldsfp->count + 1) * |
1da177e4 LT |
1221 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1222 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1223 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1224 | /* | |
1225 | * Reset our pointers, the data has moved. | |
1226 | */ | |
ac8ba50f CH |
1227 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1228 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1229 | /* |
1230 | * Fill in the new header. | |
1231 | */ | |
ac8ba50f CH |
1232 | sfp->count = oldsfp->count; |
1233 | sfp->i8count = 0; | |
8bc38787 | 1234 | xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1235 | /* |
1236 | * Copy the entries field by field. | |
1237 | */ | |
bbaaf538 CH |
1238 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1239 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1240 | i < sfp->count; |
bbaaf538 CH |
1241 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep), |
1242 | oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1243 | sfep->namelen = oldsfep->namelen; |
1244 | sfep->offset = oldsfep->offset; | |
1245 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
8bc38787 CH |
1246 | xfs_dir2_sfe_put_ino(sfp, sfep, |
1247 | xfs_dir2_sfe_get_ino(oldsfp, oldsfep)); | |
1da177e4 LT |
1248 | } |
1249 | /* | |
1250 | * Clean up the inode. | |
1251 | */ | |
f0e2d93c | 1252 | kmem_free(buf); |
1da177e4 LT |
1253 | dp->i_d.di_size = newsize; |
1254 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * Convert from 4-byte inode numbers to 8-byte inode numbers. | |
1259 | * The new 8-byte inode number is not there yet, we leave with the | |
1260 | * count 1 but no corresponding entry. | |
1261 | */ | |
1262 | static void | |
1263 | xfs_dir2_sf_toino8( | |
1264 | xfs_da_args_t *args) /* operation arguments */ | |
1265 | { | |
1266 | char *buf; /* old dir's buffer */ | |
1267 | xfs_inode_t *dp; /* incore directory inode */ | |
1268 | int i; /* entry index */ | |
1da177e4 LT |
1269 | int newsize; /* new inode size */ |
1270 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1271 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1272 | int oldsize; /* old inode size */ |
1273 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1274 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1275 | |
0b1b213f CH |
1276 | trace_xfs_dir2_sf_toino8(args); |
1277 | ||
1da177e4 LT |
1278 | dp = args->dp; |
1279 | ||
1280 | /* | |
1281 | * Copy the old directory to the buffer. | |
1282 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1283 | * Don't want xfs_idata_realloc copying the data here. | |
1284 | */ | |
1285 | oldsize = dp->i_df.if_bytes; | |
1286 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1287 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1288 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1289 | memcpy(buf, oldsfp, oldsize); |
1290 | /* | |
1291 | * Compute the new inode size. | |
1292 | */ | |
1293 | newsize = | |
1294 | oldsize + | |
ac8ba50f | 1295 | (oldsfp->count + 1) * |
1da177e4 LT |
1296 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1297 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1298 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1299 | /* | |
1300 | * Reset our pointers, the data has moved. | |
1301 | */ | |
ac8ba50f CH |
1302 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1303 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1304 | /* |
1305 | * Fill in the new header. | |
1306 | */ | |
ac8ba50f CH |
1307 | sfp->count = oldsfp->count; |
1308 | sfp->i8count = 1; | |
8bc38787 | 1309 | xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1310 | /* |
1311 | * Copy the entries field by field. | |
1312 | */ | |
bbaaf538 CH |
1313 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1314 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1315 | i < sfp->count; |
bbaaf538 CH |
1316 | i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep), |
1317 | oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1318 | sfep->namelen = oldsfep->namelen; |
1319 | sfep->offset = oldsfep->offset; | |
1320 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
8bc38787 CH |
1321 | xfs_dir2_sfe_put_ino(sfp, sfep, |
1322 | xfs_dir2_sfe_get_ino(oldsfp, oldsfep)); | |
1da177e4 LT |
1323 | } |
1324 | /* | |
1325 | * Clean up the inode. | |
1326 | */ | |
f0e2d93c | 1327 | kmem_free(buf); |
1da177e4 LT |
1328 | dp->i_d.di_size = newsize; |
1329 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1330 | } | |
1331 | #endif /* XFS_BIG_INUMS */ |