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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" | |
25 | #include "xfs_dir.h" | |
26 | #include "xfs_dir2.h" | |
27 | #include "xfs_dmapi.h" | |
28 | #include "xfs_mount.h" | |
a844f451 | 29 | #include "xfs_da_btree.h" |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
31 | #include "xfs_dir_sf.h" |
32 | #include "xfs_dir2_sf.h" | |
a844f451 | 33 | #include "xfs_attr_sf.h" |
1da177e4 | 34 | #include "xfs_dinode.h" |
1da177e4 | 35 | #include "xfs_inode.h" |
a844f451 | 36 | #include "xfs_inode_item.h" |
1da177e4 LT |
37 | #include "xfs_dir_leaf.h" |
38 | #include "xfs_error.h" | |
39 | #include "xfs_dir2_data.h" | |
40 | #include "xfs_dir2_leaf.h" | |
41 | #include "xfs_dir2_block.h" | |
42 | #include "xfs_dir2_trace.h" | |
43 | ||
44 | /* | |
45 | * Prototypes for internal functions. | |
46 | */ | |
47 | static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, | |
48 | xfs_dir2_sf_entry_t *sfep, | |
49 | xfs_dir2_data_aoff_t offset, | |
50 | int new_isize); | |
51 | static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, | |
52 | int new_isize); | |
53 | static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, | |
54 | xfs_dir2_sf_entry_t **sfepp, | |
55 | xfs_dir2_data_aoff_t *offsetp); | |
56 | #ifdef DEBUG | |
57 | static void xfs_dir2_sf_check(xfs_da_args_t *args); | |
58 | #else | |
59 | #define xfs_dir2_sf_check(args) | |
60 | #endif /* DEBUG */ | |
61 | #if XFS_BIG_INUMS | |
62 | static void xfs_dir2_sf_toino4(xfs_da_args_t *args); | |
63 | static void xfs_dir2_sf_toino8(xfs_da_args_t *args); | |
64 | #endif /* XFS_BIG_INUMS */ | |
65 | ||
66 | /* | |
67 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
68 | * directory and a header for the sf directory, if it will fit it the | |
69 | * space currently present in the inode. If it won't fit, the output | |
70 | * size is too big (but not accurate). | |
71 | */ | |
72 | int /* size for sf form */ | |
73 | xfs_dir2_block_sfsize( | |
74 | xfs_inode_t *dp, /* incore inode pointer */ | |
75 | xfs_dir2_block_t *block, /* block directory data */ | |
76 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ | |
77 | { | |
78 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
79 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
80 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
81 | int count; /* shortform entry count */ | |
82 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
83 | int i; /* block entry index */ | |
84 | int i8count; /* count of big-inode entries */ | |
85 | int isdot; /* entry is "." */ | |
86 | int isdotdot; /* entry is ".." */ | |
87 | xfs_mount_t *mp; /* mount structure pointer */ | |
88 | int namelen; /* total name bytes */ | |
5bde1ba9 | 89 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 LT |
90 | int size=0; /* total computed size */ |
91 | ||
92 | mp = dp->i_mount; | |
93 | ||
94 | count = i8count = namelen = 0; | |
95 | btp = XFS_DIR2_BLOCK_TAIL_P(mp, block); | |
96 | blp = XFS_DIR2_BLOCK_LEAF_P(btp); | |
97 | ||
98 | /* | |
99 | * Iterate over the block's data entries by using the leaf pointers. | |
100 | */ | |
101 | for (i = 0; i < INT_GET(btp->count, ARCH_CONVERT); i++) { | |
102 | if ((addr = INT_GET(blp[i].address, ARCH_CONVERT)) == XFS_DIR2_NULL_DATAPTR) | |
103 | continue; | |
104 | /* | |
105 | * Calculate the pointer to the entry at hand. | |
106 | */ | |
107 | dep = (xfs_dir2_data_entry_t *) | |
108 | ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, addr)); | |
109 | /* | |
110 | * Detect . and .., so we can special-case them. | |
111 | * . is not included in sf directories. | |
112 | * .. is included by just the parent inode number. | |
113 | */ | |
114 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
115 | isdotdot = | |
116 | dep->namelen == 2 && | |
117 | dep->name[0] == '.' && dep->name[1] == '.'; | |
118 | #if XFS_BIG_INUMS | |
119 | if (!isdot) | |
120 | i8count += INT_GET(dep->inumber, ARCH_CONVERT) > XFS_DIR2_MAX_SHORT_INUM; | |
121 | #endif | |
122 | if (!isdot && !isdotdot) { | |
123 | count++; | |
124 | namelen += dep->namelen; | |
125 | } else if (isdotdot) | |
126 | parent = INT_GET(dep->inumber, ARCH_CONVERT); | |
127 | /* | |
128 | * Calculate the new size, see if we should give up yet. | |
129 | */ | |
130 | size = XFS_DIR2_SF_HDR_SIZE(i8count) + /* header */ | |
131 | count + /* namelen */ | |
132 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
133 | namelen + /* name */ | |
134 | (i8count ? /* inumber */ | |
135 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
136 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
137 | if (size > XFS_IFORK_DSIZE(dp)) | |
138 | return size; /* size value is a failure */ | |
139 | } | |
140 | /* | |
141 | * Create the output header, if it worked. | |
142 | */ | |
143 | sfhp->count = count; | |
144 | sfhp->i8count = i8count; | |
145 | XFS_DIR2_SF_PUT_INUMBER((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent); | |
146 | return size; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Convert a block format directory to shortform. | |
151 | * Caller has already checked that it will fit, and built us a header. | |
152 | */ | |
153 | int /* error */ | |
154 | xfs_dir2_block_to_sf( | |
155 | xfs_da_args_t *args, /* operation arguments */ | |
156 | xfs_dabuf_t *bp, /* block buffer */ | |
157 | int size, /* shortform directory size */ | |
158 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
159 | { | |
160 | xfs_dir2_block_t *block; /* block structure */ | |
161 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ | |
162 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
163 | xfs_inode_t *dp; /* incore directory inode */ | |
164 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
165 | char *endptr; /* end of data entries */ | |
166 | int error; /* error return value */ | |
167 | int logflags; /* inode logging flags */ | |
168 | xfs_mount_t *mp; /* filesystem mount point */ | |
169 | char *ptr; /* current data pointer */ | |
170 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
171 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
172 | xfs_ino_t temp; | |
173 | ||
174 | xfs_dir2_trace_args_sb("block_to_sf", args, size, bp); | |
175 | dp = args->dp; | |
176 | mp = dp->i_mount; | |
177 | ||
178 | /* | |
179 | * Make a copy of the block data, so we can shrink the inode | |
180 | * and add local data. | |
181 | */ | |
182 | block = kmem_alloc(mp->m_dirblksize, KM_SLEEP); | |
183 | memcpy(block, bp->data, mp->m_dirblksize); | |
184 | logflags = XFS_ILOG_CORE; | |
185 | if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) { | |
186 | ASSERT(error != ENOSPC); | |
187 | goto out; | |
188 | } | |
189 | /* | |
190 | * The buffer is now unconditionally gone, whether | |
191 | * xfs_dir2_shrink_inode worked or not. | |
192 | * | |
193 | * Convert the inode to local format. | |
194 | */ | |
195 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
196 | dp->i_df.if_flags |= XFS_IFINLINE; | |
197 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
198 | ASSERT(dp->i_df.if_bytes == 0); | |
199 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
200 | logflags |= XFS_ILOG_DDATA; | |
201 | /* | |
202 | * Copy the header into the newly allocate local space. | |
203 | */ | |
204 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
205 | memcpy(sfp, sfhp, XFS_DIR2_SF_HDR_SIZE(sfhp->i8count)); | |
206 | dp->i_d.di_size = size; | |
207 | /* | |
208 | * Set up to loop over the block's entries. | |
209 | */ | |
210 | btp = XFS_DIR2_BLOCK_TAIL_P(mp, block); | |
211 | ptr = (char *)block->u; | |
212 | endptr = (char *)XFS_DIR2_BLOCK_LEAF_P(btp); | |
213 | sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
214 | /* | |
215 | * Loop over the active and unused entries. | |
216 | * Stop when we reach the leaf/tail portion of the block. | |
217 | */ | |
218 | while (ptr < endptr) { | |
219 | /* | |
220 | * If it's unused, just skip over it. | |
221 | */ | |
222 | dup = (xfs_dir2_data_unused_t *)ptr; | |
223 | if (INT_GET(dup->freetag, ARCH_CONVERT) == XFS_DIR2_DATA_FREE_TAG) { | |
224 | ptr += INT_GET(dup->length, ARCH_CONVERT); | |
225 | continue; | |
226 | } | |
227 | dep = (xfs_dir2_data_entry_t *)ptr; | |
228 | /* | |
229 | * Skip . | |
230 | */ | |
231 | if (dep->namelen == 1 && dep->name[0] == '.') | |
232 | ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) == dp->i_ino); | |
233 | /* | |
234 | * Skip .., but make sure the inode number is right. | |
235 | */ | |
236 | else if (dep->namelen == 2 && | |
237 | dep->name[0] == '.' && dep->name[1] == '.') | |
238 | ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) == | |
239 | XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent)); | |
240 | /* | |
241 | * Normal entry, copy it into shortform. | |
242 | */ | |
243 | else { | |
244 | sfep->namelen = dep->namelen; | |
245 | XFS_DIR2_SF_PUT_OFFSET(sfep, | |
246 | (xfs_dir2_data_aoff_t) | |
247 | ((char *)dep - (char *)block)); | |
248 | memcpy(sfep->name, dep->name, dep->namelen); | |
249 | temp=INT_GET(dep->inumber, ARCH_CONVERT); | |
250 | XFS_DIR2_SF_PUT_INUMBER(sfp, &temp, | |
251 | XFS_DIR2_SF_INUMBERP(sfep)); | |
252 | sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep); | |
253 | } | |
254 | ptr += XFS_DIR2_DATA_ENTSIZE(dep->namelen); | |
255 | } | |
256 | ASSERT((char *)sfep - (char *)sfp == size); | |
257 | xfs_dir2_sf_check(args); | |
258 | out: | |
259 | xfs_trans_log_inode(args->trans, dp, logflags); | |
260 | kmem_free(block, mp->m_dirblksize); | |
261 | return error; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Add a name to a shortform directory. | |
266 | * There are two algorithms, "easy" and "hard" which we decide on | |
267 | * before changing anything. | |
268 | * Convert to block form if necessary, if the new entry won't fit. | |
269 | */ | |
270 | int /* error */ | |
271 | xfs_dir2_sf_addname( | |
272 | xfs_da_args_t *args) /* operation arguments */ | |
273 | { | |
274 | int add_entsize; /* size of the new entry */ | |
275 | xfs_inode_t *dp; /* incore directory inode */ | |
276 | int error; /* error return value */ | |
277 | int incr_isize; /* total change in size */ | |
278 | int new_isize; /* di_size after adding name */ | |
279 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 280 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 LT |
281 | int old_isize; /* di_size before adding name */ |
282 | int pick; /* which algorithm to use */ | |
283 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
5bde1ba9 | 284 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 LT |
285 | |
286 | xfs_dir2_trace_args("sf_addname", args); | |
287 | ASSERT(xfs_dir2_sf_lookup(args) == ENOENT); | |
288 | dp = args->dp; | |
289 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
290 | /* | |
291 | * Make sure the shortform value has some of its header. | |
292 | */ | |
293 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
294 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
295 | return XFS_ERROR(EIO); | |
296 | } | |
297 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
298 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
299 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
300 | ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)); | |
301 | /* | |
302 | * Compute entry (and change in) size. | |
303 | */ | |
304 | add_entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen); | |
305 | incr_isize = add_entsize; | |
306 | objchange = 0; | |
307 | #if XFS_BIG_INUMS | |
308 | /* | |
309 | * Do we have to change to 8 byte inodes? | |
310 | */ | |
311 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) { | |
312 | /* | |
313 | * Yes, adjust the entry size and the total size. | |
314 | */ | |
315 | add_entsize += | |
316 | (uint)sizeof(xfs_dir2_ino8_t) - | |
317 | (uint)sizeof(xfs_dir2_ino4_t); | |
318 | incr_isize += | |
319 | (sfp->hdr.count + 2) * | |
320 | ((uint)sizeof(xfs_dir2_ino8_t) - | |
321 | (uint)sizeof(xfs_dir2_ino4_t)); | |
322 | objchange = 1; | |
323 | } | |
324 | #endif | |
325 | old_isize = (int)dp->i_d.di_size; | |
326 | new_isize = old_isize + incr_isize; | |
327 | /* | |
328 | * Won't fit as shortform any more (due to size), | |
329 | * or the pick routine says it won't (due to offset values). | |
330 | */ | |
331 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
332 | (pick = | |
333 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
334 | /* | |
335 | * Just checking or no space reservation, it doesn't fit. | |
336 | */ | |
337 | if (args->justcheck || args->total == 0) | |
338 | return XFS_ERROR(ENOSPC); | |
339 | /* | |
340 | * Convert to block form then add the name. | |
341 | */ | |
342 | error = xfs_dir2_sf_to_block(args); | |
343 | if (error) | |
344 | return error; | |
345 | return xfs_dir2_block_addname(args); | |
346 | } | |
347 | /* | |
348 | * Just checking, it fits. | |
349 | */ | |
350 | if (args->justcheck) | |
351 | return 0; | |
352 | /* | |
353 | * Do it the easy way - just add it at the end. | |
354 | */ | |
355 | if (pick == 1) | |
356 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
357 | /* | |
358 | * Do it the hard way - look for a place to insert the new entry. | |
359 | * Convert to 8 byte inode numbers first if necessary. | |
360 | */ | |
361 | else { | |
362 | ASSERT(pick == 2); | |
363 | #if XFS_BIG_INUMS | |
364 | if (objchange) | |
365 | xfs_dir2_sf_toino8(args); | |
366 | #endif | |
367 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); | |
368 | } | |
369 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | /* | |
374 | * Add the new entry the "easy" way. | |
375 | * This is copying the old directory and adding the new entry at the end. | |
376 | * Since it's sorted by "offset" we need room after the last offset | |
377 | * that's already there, and then room to convert to a block directory. | |
378 | * This is already checked by the pick routine. | |
379 | */ | |
380 | static void | |
381 | xfs_dir2_sf_addname_easy( | |
382 | xfs_da_args_t *args, /* operation arguments */ | |
383 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
384 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
385 | int new_isize) /* new directory size */ | |
386 | { | |
387 | int byteoff; /* byte offset in sf dir */ | |
388 | xfs_inode_t *dp; /* incore directory inode */ | |
389 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
390 | ||
391 | dp = args->dp; | |
392 | ||
393 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
394 | byteoff = (int)((char *)sfep - (char *)sfp); | |
395 | /* | |
396 | * Grow the in-inode space. | |
397 | */ | |
398 | xfs_idata_realloc(dp, XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen), | |
399 | XFS_DATA_FORK); | |
400 | /* | |
401 | * Need to set up again due to realloc of the inode data. | |
402 | */ | |
403 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
404 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); | |
405 | /* | |
406 | * Fill in the new entry. | |
407 | */ | |
408 | sfep->namelen = args->namelen; | |
409 | XFS_DIR2_SF_PUT_OFFSET(sfep, offset); | |
410 | memcpy(sfep->name, args->name, sfep->namelen); | |
411 | XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, | |
412 | XFS_DIR2_SF_INUMBERP(sfep)); | |
413 | /* | |
414 | * Update the header and inode. | |
415 | */ | |
416 | sfp->hdr.count++; | |
417 | #if XFS_BIG_INUMS | |
418 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) | |
419 | sfp->hdr.i8count++; | |
420 | #endif | |
421 | dp->i_d.di_size = new_isize; | |
422 | xfs_dir2_sf_check(args); | |
423 | } | |
424 | ||
425 | /* | |
426 | * Add the new entry the "hard" way. | |
427 | * The caller has already converted to 8 byte inode numbers if necessary, | |
428 | * in which case we need to leave the i8count at 1. | |
429 | * Find a hole that the new entry will fit into, and copy | |
430 | * the first part of the entries, the new entry, and the last part of | |
431 | * the entries. | |
432 | */ | |
433 | /* ARGSUSED */ | |
434 | static void | |
435 | xfs_dir2_sf_addname_hard( | |
436 | xfs_da_args_t *args, /* operation arguments */ | |
437 | int objchange, /* changing inode number size */ | |
438 | int new_isize) /* new directory size */ | |
439 | { | |
440 | int add_datasize; /* data size need for new ent */ | |
441 | char *buf; /* buffer for old */ | |
442 | xfs_inode_t *dp; /* incore directory inode */ | |
443 | int eof; /* reached end of old dir */ | |
444 | int nbytes; /* temp for byte copies */ | |
445 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
446 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
447 | int old_isize; /* previous di_size */ | |
448 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
449 | xfs_dir2_sf_t *oldsfp; /* original shortform dir */ | |
450 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ | |
451 | xfs_dir2_sf_t *sfp; /* new shortform dir */ | |
452 | ||
453 | /* | |
454 | * Copy the old directory to the stack buffer. | |
455 | */ | |
456 | dp = args->dp; | |
457 | ||
458 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
459 | old_isize = (int)dp->i_d.di_size; | |
460 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
461 | oldsfp = (xfs_dir2_sf_t *)buf; | |
462 | memcpy(oldsfp, sfp, old_isize); | |
463 | /* | |
464 | * Loop over the old directory finding the place we're going | |
465 | * to insert the new entry. | |
466 | * If it's going to end up at the end then oldsfep will point there. | |
467 | */ | |
468 | for (offset = XFS_DIR2_DATA_FIRST_OFFSET, | |
469 | oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp), | |
470 | add_datasize = XFS_DIR2_DATA_ENTSIZE(args->namelen), | |
471 | eof = (char *)oldsfep == &buf[old_isize]; | |
472 | !eof; | |
473 | offset = new_offset + XFS_DIR2_DATA_ENTSIZE(oldsfep->namelen), | |
474 | oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep), | |
475 | eof = (char *)oldsfep == &buf[old_isize]) { | |
476 | new_offset = XFS_DIR2_SF_GET_OFFSET(oldsfep); | |
477 | if (offset + add_datasize <= new_offset) | |
478 | break; | |
479 | } | |
480 | /* | |
481 | * Get rid of the old directory, then allocate space for | |
482 | * the new one. We do this so xfs_idata_realloc won't copy | |
483 | * the data. | |
484 | */ | |
485 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
486 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
487 | /* | |
488 | * Reset the pointer since the buffer was reallocated. | |
489 | */ | |
490 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
491 | /* | |
492 | * Copy the first part of the directory, including the header. | |
493 | */ | |
494 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
495 | memcpy(sfp, oldsfp, nbytes); | |
496 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
497 | /* | |
498 | * Fill in the new entry, and update the header counts. | |
499 | */ | |
500 | sfep->namelen = args->namelen; | |
501 | XFS_DIR2_SF_PUT_OFFSET(sfep, offset); | |
502 | memcpy(sfep->name, args->name, sfep->namelen); | |
503 | XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, | |
504 | XFS_DIR2_SF_INUMBERP(sfep)); | |
505 | sfp->hdr.count++; | |
506 | #if XFS_BIG_INUMS | |
507 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) | |
508 | sfp->hdr.i8count++; | |
509 | #endif | |
510 | /* | |
511 | * If there's more left to copy, do that. | |
512 | */ | |
513 | if (!eof) { | |
514 | sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep); | |
515 | memcpy(sfep, oldsfep, old_isize - nbytes); | |
516 | } | |
517 | kmem_free(buf, old_isize); | |
518 | dp->i_d.di_size = new_isize; | |
519 | xfs_dir2_sf_check(args); | |
520 | } | |
521 | ||
522 | /* | |
523 | * Decide if the new entry will fit at all. | |
524 | * If it will fit, pick between adding the new entry to the end (easy) | |
525 | * or somewhere else (hard). | |
526 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
527 | */ | |
528 | /*ARGSUSED*/ | |
529 | static int /* pick result */ | |
530 | xfs_dir2_sf_addname_pick( | |
531 | xfs_da_args_t *args, /* operation arguments */ | |
532 | int objchange, /* inode # size changes */ | |
533 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
534 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
535 | { | |
536 | xfs_inode_t *dp; /* incore directory inode */ | |
537 | int holefit; /* found hole it will fit in */ | |
538 | int i; /* entry number */ | |
539 | xfs_mount_t *mp; /* filesystem mount point */ | |
540 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
541 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
542 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
543 | int size; /* entry's data size */ | |
544 | int used; /* data bytes used */ | |
545 | ||
546 | dp = args->dp; | |
547 | mp = dp->i_mount; | |
548 | ||
549 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
550 | size = XFS_DIR2_DATA_ENTSIZE(args->namelen); | |
551 | offset = XFS_DIR2_DATA_FIRST_OFFSET; | |
552 | sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
553 | holefit = 0; | |
554 | /* | |
555 | * Loop over sf entries. | |
556 | * Keep track of data offset and whether we've seen a place | |
557 | * to insert the new entry. | |
558 | */ | |
559 | for (i = 0; i < sfp->hdr.count; i++) { | |
560 | if (!holefit) | |
561 | holefit = offset + size <= XFS_DIR2_SF_GET_OFFSET(sfep); | |
562 | offset = XFS_DIR2_SF_GET_OFFSET(sfep) + | |
563 | XFS_DIR2_DATA_ENTSIZE(sfep->namelen); | |
564 | sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep); | |
565 | } | |
566 | /* | |
567 | * Calculate data bytes used excluding the new entry, if this | |
568 | * was a data block (block form directory). | |
569 | */ | |
570 | used = offset + | |
571 | (sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + | |
572 | (uint)sizeof(xfs_dir2_block_tail_t); | |
573 | /* | |
574 | * If it won't fit in a block form then we can't insert it, | |
575 | * we'll go back, convert to block, then try the insert and convert | |
576 | * to leaf. | |
577 | */ | |
578 | if (used + (holefit ? 0 : size) > mp->m_dirblksize) | |
579 | return 0; | |
580 | /* | |
581 | * If changing the inode number size, do it the hard way. | |
582 | */ | |
583 | #if XFS_BIG_INUMS | |
584 | if (objchange) { | |
585 | return 2; | |
586 | } | |
587 | #else | |
588 | ASSERT(objchange == 0); | |
589 | #endif | |
590 | /* | |
591 | * If it won't fit at the end then do it the hard way (use the hole). | |
592 | */ | |
593 | if (used + size > mp->m_dirblksize) | |
594 | return 2; | |
595 | /* | |
596 | * Do it the easy way. | |
597 | */ | |
598 | *sfepp = sfep; | |
599 | *offsetp = offset; | |
600 | return 1; | |
601 | } | |
602 | ||
603 | #ifdef DEBUG | |
604 | /* | |
605 | * Check consistency of shortform directory, assert if bad. | |
606 | */ | |
607 | static void | |
608 | xfs_dir2_sf_check( | |
609 | xfs_da_args_t *args) /* operation arguments */ | |
610 | { | |
611 | xfs_inode_t *dp; /* incore directory inode */ | |
612 | int i; /* entry number */ | |
613 | int i8count; /* number of big inode#s */ | |
614 | xfs_ino_t ino; /* entry inode number */ | |
615 | int offset; /* data offset */ | |
616 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
617 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
618 | ||
619 | dp = args->dp; | |
620 | ||
621 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
622 | offset = XFS_DIR2_DATA_FIRST_OFFSET; | |
623 | ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent); | |
624 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; | |
625 | ||
626 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
627 | i < sfp->hdr.count; | |
628 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) { | |
629 | ASSERT(XFS_DIR2_SF_GET_OFFSET(sfep) >= offset); | |
630 | ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep)); | |
631 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; | |
632 | offset = | |
633 | XFS_DIR2_SF_GET_OFFSET(sfep) + | |
634 | XFS_DIR2_DATA_ENTSIZE(sfep->namelen); | |
635 | } | |
636 | ASSERT(i8count == sfp->hdr.i8count); | |
637 | ASSERT(XFS_BIG_INUMS || i8count == 0); | |
638 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); | |
639 | ASSERT(offset + | |
640 | (sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + | |
641 | (uint)sizeof(xfs_dir2_block_tail_t) <= | |
642 | dp->i_mount->m_dirblksize); | |
643 | } | |
644 | #endif /* DEBUG */ | |
645 | ||
646 | /* | |
647 | * Create a new (shortform) directory. | |
648 | */ | |
649 | int /* error, always 0 */ | |
650 | xfs_dir2_sf_create( | |
651 | xfs_da_args_t *args, /* operation arguments */ | |
652 | xfs_ino_t pino) /* parent inode number */ | |
653 | { | |
654 | xfs_inode_t *dp; /* incore directory inode */ | |
655 | int i8count; /* parent inode is an 8-byte number */ | |
656 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
657 | int size; /* directory size */ | |
658 | ||
659 | xfs_dir2_trace_args_i("sf_create", args, pino); | |
660 | dp = args->dp; | |
661 | ||
662 | ASSERT(dp != NULL); | |
663 | ASSERT(dp->i_d.di_size == 0); | |
664 | /* | |
665 | * If it's currently a zero-length extent file, | |
666 | * convert it to local format. | |
667 | */ | |
668 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
669 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
670 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
671 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
672 | dp->i_df.if_flags |= XFS_IFINLINE; | |
673 | } | |
674 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
675 | ASSERT(dp->i_df.if_bytes == 0); | |
676 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
677 | size = XFS_DIR2_SF_HDR_SIZE(i8count); | |
678 | /* | |
679 | * Make a buffer for the data. | |
680 | */ | |
681 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
682 | /* | |
683 | * Fill in the header, | |
684 | */ | |
685 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
686 | sfp->hdr.i8count = i8count; | |
687 | /* | |
688 | * Now can put in the inode number, since i8count is set. | |
689 | */ | |
690 | XFS_DIR2_SF_PUT_INUMBER(sfp, &pino, &sfp->hdr.parent); | |
691 | sfp->hdr.count = 0; | |
692 | dp->i_d.di_size = size; | |
693 | xfs_dir2_sf_check(args); | |
694 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | int /* error */ | |
699 | xfs_dir2_sf_getdents( | |
700 | xfs_inode_t *dp, /* incore directory inode */ | |
701 | uio_t *uio, /* caller's buffer control */ | |
702 | int *eofp, /* eof reached? (out) */ | |
703 | xfs_dirent_t *dbp, /* caller's buffer */ | |
704 | xfs_dir2_put_t put) /* abi's formatting function */ | |
705 | { | |
706 | int error; /* error return value */ | |
707 | int i; /* shortform entry number */ | |
708 | xfs_mount_t *mp; /* filesystem mount point */ | |
709 | xfs_dir2_dataptr_t off; /* current entry's offset */ | |
710 | xfs_dir2_put_args_t p; /* arg package for put rtn */ | |
711 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
712 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
713 | xfs_off_t dir_offset; | |
714 | ||
715 | mp = dp->i_mount; | |
716 | ||
717 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
718 | /* | |
719 | * Give up if the directory is way too short. | |
720 | */ | |
721 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
722 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
723 | return XFS_ERROR(EIO); | |
724 | } | |
725 | ||
726 | dir_offset = uio->uio_offset; | |
727 | ||
728 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
729 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
730 | ||
731 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
732 | ||
733 | ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)); | |
734 | ||
735 | /* | |
736 | * If the block number in the offset is out of range, we're done. | |
737 | */ | |
738 | if (XFS_DIR2_DATAPTR_TO_DB(mp, dir_offset) > mp->m_dirdatablk) { | |
739 | *eofp = 1; | |
740 | return 0; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Set up putargs structure. | |
745 | */ | |
746 | p.dbp = dbp; | |
747 | p.put = put; | |
748 | p.uio = uio; | |
749 | /* | |
750 | * Put . entry unless we're starting past it. | |
751 | */ | |
752 | if (dir_offset <= | |
753 | XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
754 | XFS_DIR2_DATA_DOT_OFFSET)) { | |
755 | p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, 0, | |
756 | XFS_DIR2_DATA_DOTDOT_OFFSET); | |
757 | p.ino = dp->i_ino; | |
758 | #if XFS_BIG_INUMS | |
759 | p.ino += mp->m_inoadd; | |
760 | #endif | |
761 | p.name = "."; | |
762 | p.namelen = 1; | |
763 | ||
764 | error = p.put(&p); | |
765 | ||
766 | if (!p.done) { | |
767 | uio->uio_offset = | |
768 | XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
769 | XFS_DIR2_DATA_DOT_OFFSET); | |
770 | return error; | |
771 | } | |
772 | } | |
773 | ||
774 | /* | |
775 | * Put .. entry unless we're starting past it. | |
776 | */ | |
777 | if (dir_offset <= | |
778 | XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
779 | XFS_DIR2_DATA_DOTDOT_OFFSET)) { | |
780 | p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
781 | XFS_DIR2_DATA_FIRST_OFFSET); | |
782 | p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent); | |
783 | #if XFS_BIG_INUMS | |
784 | p.ino += mp->m_inoadd; | |
785 | #endif | |
786 | p.name = ".."; | |
787 | p.namelen = 2; | |
788 | ||
789 | error = p.put(&p); | |
790 | ||
791 | if (!p.done) { | |
792 | uio->uio_offset = | |
793 | XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
794 | XFS_DIR2_DATA_DOTDOT_OFFSET); | |
795 | return error; | |
796 | } | |
797 | } | |
798 | ||
799 | /* | |
800 | * Loop while there are more entries and put'ing works. | |
801 | */ | |
802 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
803 | i < sfp->hdr.count; | |
804 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) { | |
805 | ||
806 | off = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
807 | XFS_DIR2_SF_GET_OFFSET(sfep)); | |
808 | ||
809 | if (dir_offset > off) | |
810 | continue; | |
811 | ||
812 | p.namelen = sfep->namelen; | |
813 | ||
814 | p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk, | |
815 | XFS_DIR2_SF_GET_OFFSET(sfep) + | |
816 | XFS_DIR2_DATA_ENTSIZE(p.namelen)); | |
817 | ||
818 | p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep)); | |
819 | #if XFS_BIG_INUMS | |
820 | p.ino += mp->m_inoadd; | |
821 | #endif | |
822 | p.name = (char *)sfep->name; | |
823 | ||
824 | error = p.put(&p); | |
825 | ||
826 | if (!p.done) { | |
827 | uio->uio_offset = off; | |
828 | return error; | |
829 | } | |
830 | } | |
831 | ||
832 | /* | |
833 | * They all fit. | |
834 | */ | |
835 | *eofp = 1; | |
836 | ||
837 | uio->uio_offset = | |
838 | XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | /* | |
844 | * Lookup an entry in a shortform directory. | |
845 | * Returns EEXIST if found, ENOENT if not found. | |
846 | */ | |
847 | int /* error */ | |
848 | xfs_dir2_sf_lookup( | |
849 | xfs_da_args_t *args) /* operation arguments */ | |
850 | { | |
851 | xfs_inode_t *dp; /* incore directory inode */ | |
852 | int i; /* entry index */ | |
853 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
854 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
855 | ||
856 | xfs_dir2_trace_args("sf_lookup", args); | |
857 | xfs_dir2_sf_check(args); | |
858 | dp = args->dp; | |
859 | ||
860 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
861 | /* | |
862 | * Bail out if the directory is way too short. | |
863 | */ | |
864 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
865 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
866 | return XFS_ERROR(EIO); | |
867 | } | |
868 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
869 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
870 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
871 | ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)); | |
872 | /* | |
873 | * Special case for . | |
874 | */ | |
875 | if (args->namelen == 1 && args->name[0] == '.') { | |
876 | args->inumber = dp->i_ino; | |
877 | return XFS_ERROR(EEXIST); | |
878 | } | |
879 | /* | |
880 | * Special case for .. | |
881 | */ | |
882 | if (args->namelen == 2 && | |
883 | args->name[0] == '.' && args->name[1] == '.') { | |
884 | args->inumber = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent); | |
885 | return XFS_ERROR(EEXIST); | |
886 | } | |
887 | /* | |
888 | * Loop over all the entries trying to match ours. | |
889 | */ | |
890 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
891 | i < sfp->hdr.count; | |
892 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) { | |
893 | if (sfep->namelen == args->namelen && | |
894 | sfep->name[0] == args->name[0] && | |
895 | memcmp(args->name, sfep->name, args->namelen) == 0) { | |
896 | args->inumber = | |
897 | XFS_DIR2_SF_GET_INUMBER(sfp, | |
898 | XFS_DIR2_SF_INUMBERP(sfep)); | |
899 | return XFS_ERROR(EEXIST); | |
900 | } | |
901 | } | |
902 | /* | |
903 | * Didn't find it. | |
904 | */ | |
905 | ASSERT(args->oknoent); | |
906 | return XFS_ERROR(ENOENT); | |
907 | } | |
908 | ||
909 | /* | |
910 | * Remove an entry from a shortform directory. | |
911 | */ | |
912 | int /* error */ | |
913 | xfs_dir2_sf_removename( | |
914 | xfs_da_args_t *args) | |
915 | { | |
916 | int byteoff; /* offset of removed entry */ | |
917 | xfs_inode_t *dp; /* incore directory inode */ | |
918 | int entsize; /* this entry's size */ | |
919 | int i; /* shortform entry index */ | |
920 | int newsize; /* new inode size */ | |
921 | int oldsize; /* old inode size */ | |
922 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
923 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
924 | ||
925 | xfs_dir2_trace_args("sf_removename", args); | |
926 | dp = args->dp; | |
927 | ||
928 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
929 | oldsize = (int)dp->i_d.di_size; | |
930 | /* | |
931 | * Bail out if the directory is way too short. | |
932 | */ | |
933 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
934 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
935 | return XFS_ERROR(EIO); | |
936 | } | |
937 | ASSERT(dp->i_df.if_bytes == oldsize); | |
938 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
939 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
940 | ASSERT(oldsize >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)); | |
941 | /* | |
942 | * Loop over the old directory entries. | |
943 | * Find the one we're deleting. | |
944 | */ | |
945 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
946 | i < sfp->hdr.count; | |
947 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) { | |
948 | if (sfep->namelen == args->namelen && | |
949 | sfep->name[0] == args->name[0] && | |
950 | memcmp(sfep->name, args->name, args->namelen) == 0) { | |
951 | ASSERT(XFS_DIR2_SF_GET_INUMBER(sfp, | |
952 | XFS_DIR2_SF_INUMBERP(sfep)) == | |
953 | args->inumber); | |
954 | break; | |
955 | } | |
956 | } | |
957 | /* | |
958 | * Didn't find it. | |
959 | */ | |
960 | if (i == sfp->hdr.count) { | |
961 | return XFS_ERROR(ENOENT); | |
962 | } | |
963 | /* | |
964 | * Calculate sizes. | |
965 | */ | |
966 | byteoff = (int)((char *)sfep - (char *)sfp); | |
967 | entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen); | |
968 | newsize = oldsize - entsize; | |
969 | /* | |
970 | * Copy the part if any after the removed entry, sliding it down. | |
971 | */ | |
972 | if (byteoff + entsize < oldsize) | |
973 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
974 | oldsize - (byteoff + entsize)); | |
975 | /* | |
976 | * Fix up the header and file size. | |
977 | */ | |
978 | sfp->hdr.count--; | |
979 | dp->i_d.di_size = newsize; | |
980 | /* | |
981 | * Reallocate, making it smaller. | |
982 | */ | |
983 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
984 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
985 | #if XFS_BIG_INUMS | |
986 | /* | |
987 | * Are we changing inode number size? | |
988 | */ | |
989 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
990 | if (sfp->hdr.i8count == 1) | |
991 | xfs_dir2_sf_toino4(args); | |
992 | else | |
993 | sfp->hdr.i8count--; | |
994 | } | |
995 | #endif | |
996 | xfs_dir2_sf_check(args); | |
997 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * Replace the inode number of an entry in a shortform directory. | |
1003 | */ | |
1004 | int /* error */ | |
1005 | xfs_dir2_sf_replace( | |
1006 | xfs_da_args_t *args) /* operation arguments */ | |
1007 | { | |
1008 | xfs_inode_t *dp; /* incore directory inode */ | |
1009 | int i; /* entry index */ | |
1010 | #if XFS_BIG_INUMS || defined(DEBUG) | |
1011 | xfs_ino_t ino=0; /* entry old inode number */ | |
1012 | #endif | |
1013 | #if XFS_BIG_INUMS | |
1014 | int i8elevated; /* sf_toino8 set i8count=1 */ | |
1015 | #endif | |
1016 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
1017 | xfs_dir2_sf_t *sfp; /* shortform structure */ | |
1018 | ||
1019 | xfs_dir2_trace_args("sf_replace", args); | |
1020 | dp = args->dp; | |
1021 | ||
1022 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
1023 | /* | |
1024 | * Bail out if the shortform directory is way too small. | |
1025 | */ | |
1026 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
1027 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
1028 | return XFS_ERROR(EIO); | |
1029 | } | |
1030 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
1031 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
1032 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
1033 | ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)); | |
1034 | #if XFS_BIG_INUMS | |
1035 | /* | |
1036 | * New inode number is large, and need to convert to 8-byte inodes. | |
1037 | */ | |
1038 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) { | |
1039 | int error; /* error return value */ | |
1040 | int newsize; /* new inode size */ | |
1041 | ||
1042 | newsize = | |
1043 | dp->i_df.if_bytes + | |
1044 | (sfp->hdr.count + 1) * | |
1045 | ((uint)sizeof(xfs_dir2_ino8_t) - | |
1046 | (uint)sizeof(xfs_dir2_ino4_t)); | |
1047 | /* | |
1048 | * Won't fit as shortform, convert to block then do replace. | |
1049 | */ | |
1050 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
1051 | error = xfs_dir2_sf_to_block(args); | |
1052 | if (error) { | |
1053 | return error; | |
1054 | } | |
1055 | return xfs_dir2_block_replace(args); | |
1056 | } | |
1057 | /* | |
1058 | * Still fits, convert to 8-byte now. | |
1059 | */ | |
1060 | xfs_dir2_sf_toino8(args); | |
1061 | i8elevated = 1; | |
1062 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
1063 | } else | |
1064 | i8elevated = 0; | |
1065 | #endif | |
1066 | ASSERT(args->namelen != 1 || args->name[0] != '.'); | |
1067 | /* | |
1068 | * Replace ..'s entry. | |
1069 | */ | |
1070 | if (args->namelen == 2 && | |
1071 | args->name[0] == '.' && args->name[1] == '.') { | |
1072 | #if XFS_BIG_INUMS || defined(DEBUG) | |
1073 | ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent); | |
1074 | ASSERT(args->inumber != ino); | |
1075 | #endif | |
1076 | XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, &sfp->hdr.parent); | |
1077 | } | |
1078 | /* | |
1079 | * Normal entry, look for the name. | |
1080 | */ | |
1081 | else { | |
1082 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp); | |
1083 | i < sfp->hdr.count; | |
1084 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) { | |
1085 | if (sfep->namelen == args->namelen && | |
1086 | sfep->name[0] == args->name[0] && | |
1087 | memcmp(args->name, sfep->name, args->namelen) == 0) { | |
1088 | #if XFS_BIG_INUMS || defined(DEBUG) | |
1089 | ino = XFS_DIR2_SF_GET_INUMBER(sfp, | |
1090 | XFS_DIR2_SF_INUMBERP(sfep)); | |
1091 | ASSERT(args->inumber != ino); | |
1092 | #endif | |
1093 | XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, | |
1094 | XFS_DIR2_SF_INUMBERP(sfep)); | |
1095 | break; | |
1096 | } | |
1097 | } | |
1098 | /* | |
1099 | * Didn't find it. | |
1100 | */ | |
1101 | if (i == sfp->hdr.count) { | |
1102 | ASSERT(args->oknoent); | |
1103 | #if XFS_BIG_INUMS | |
1104 | if (i8elevated) | |
1105 | xfs_dir2_sf_toino4(args); | |
1106 | #endif | |
1107 | return XFS_ERROR(ENOENT); | |
1108 | } | |
1109 | } | |
1110 | #if XFS_BIG_INUMS | |
1111 | /* | |
1112 | * See if the old number was large, the new number is small. | |
1113 | */ | |
1114 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
1115 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
1116 | /* | |
1117 | * And the old count was one, so need to convert to small. | |
1118 | */ | |
1119 | if (sfp->hdr.i8count == 1) | |
1120 | xfs_dir2_sf_toino4(args); | |
1121 | else | |
1122 | sfp->hdr.i8count--; | |
1123 | } | |
1124 | /* | |
1125 | * See if the old number was small, the new number is large. | |
1126 | */ | |
1127 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
1128 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
1129 | /* | |
1130 | * add to the i8count unless we just converted to 8-byte | |
1131 | * inodes (which does an implied i8count = 1) | |
1132 | */ | |
1133 | ASSERT(sfp->hdr.i8count != 0); | |
1134 | if (!i8elevated) | |
1135 | sfp->hdr.i8count++; | |
1136 | } | |
1137 | #endif | |
1138 | xfs_dir2_sf_check(args); | |
1139 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | #if XFS_BIG_INUMS | |
1144 | /* | |
1145 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1146 | * The last 8-byte inode number is gone, but the count is still 1. | |
1147 | */ | |
1148 | static void | |
1149 | xfs_dir2_sf_toino4( | |
1150 | xfs_da_args_t *args) /* operation arguments */ | |
1151 | { | |
1152 | char *buf; /* old dir's buffer */ | |
1153 | xfs_inode_t *dp; /* incore directory inode */ | |
1154 | int i; /* entry index */ | |
1155 | xfs_ino_t ino; /* entry inode number */ | |
1156 | int newsize; /* new inode size */ | |
1157 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
1158 | xfs_dir2_sf_t *oldsfp; /* old sf directory */ | |
1159 | int oldsize; /* old inode size */ | |
1160 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
1161 | xfs_dir2_sf_t *sfp; /* new sf directory */ | |
1162 | ||
1163 | xfs_dir2_trace_args("sf_toino4", args); | |
1164 | dp = args->dp; | |
1165 | ||
1166 | /* | |
1167 | * Copy the old directory to the buffer. | |
1168 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1169 | * Don't want xfs_idata_realloc copying the data here. | |
1170 | */ | |
1171 | oldsize = dp->i_df.if_bytes; | |
1172 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
1173 | oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
1174 | ASSERT(oldsfp->hdr.i8count == 1); | |
1175 | memcpy(buf, oldsfp, oldsize); | |
1176 | /* | |
1177 | * Compute the new inode size. | |
1178 | */ | |
1179 | newsize = | |
1180 | oldsize - | |
1181 | (oldsfp->hdr.count + 1) * | |
1182 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); | |
1183 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1184 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1185 | /* | |
1186 | * Reset our pointers, the data has moved. | |
1187 | */ | |
1188 | oldsfp = (xfs_dir2_sf_t *)buf; | |
1189 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
1190 | /* | |
1191 | * Fill in the new header. | |
1192 | */ | |
1193 | sfp->hdr.count = oldsfp->hdr.count; | |
1194 | sfp->hdr.i8count = 0; | |
1195 | ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent); | |
1196 | XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent); | |
1197 | /* | |
1198 | * Copy the entries field by field. | |
1199 | */ | |
1200 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp), | |
1201 | oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp); | |
1202 | i < sfp->hdr.count; | |
1203 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep), | |
1204 | oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) { | |
1205 | sfep->namelen = oldsfep->namelen; | |
1206 | sfep->offset = oldsfep->offset; | |
1207 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
1208 | ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, | |
1209 | XFS_DIR2_SF_INUMBERP(oldsfep)); | |
1210 | XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep)); | |
1211 | } | |
1212 | /* | |
1213 | * Clean up the inode. | |
1214 | */ | |
1215 | kmem_free(buf, oldsize); | |
1216 | dp->i_d.di_size = newsize; | |
1217 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * Convert from 4-byte inode numbers to 8-byte inode numbers. | |
1222 | * The new 8-byte inode number is not there yet, we leave with the | |
1223 | * count 1 but no corresponding entry. | |
1224 | */ | |
1225 | static void | |
1226 | xfs_dir2_sf_toino8( | |
1227 | xfs_da_args_t *args) /* operation arguments */ | |
1228 | { | |
1229 | char *buf; /* old dir's buffer */ | |
1230 | xfs_inode_t *dp; /* incore directory inode */ | |
1231 | int i; /* entry index */ | |
1232 | xfs_ino_t ino; /* entry inode number */ | |
1233 | int newsize; /* new inode size */ | |
1234 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
1235 | xfs_dir2_sf_t *oldsfp; /* old sf directory */ | |
1236 | int oldsize; /* old inode size */ | |
1237 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
1238 | xfs_dir2_sf_t *sfp; /* new sf directory */ | |
1239 | ||
1240 | xfs_dir2_trace_args("sf_toino8", args); | |
1241 | dp = args->dp; | |
1242 | ||
1243 | /* | |
1244 | * Copy the old directory to the buffer. | |
1245 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1246 | * Don't want xfs_idata_realloc copying the data here. | |
1247 | */ | |
1248 | oldsize = dp->i_df.if_bytes; | |
1249 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
1250 | oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
1251 | ASSERT(oldsfp->hdr.i8count == 0); | |
1252 | memcpy(buf, oldsfp, oldsize); | |
1253 | /* | |
1254 | * Compute the new inode size. | |
1255 | */ | |
1256 | newsize = | |
1257 | oldsize + | |
1258 | (oldsfp->hdr.count + 1) * | |
1259 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); | |
1260 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1261 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1262 | /* | |
1263 | * Reset our pointers, the data has moved. | |
1264 | */ | |
1265 | oldsfp = (xfs_dir2_sf_t *)buf; | |
1266 | sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data; | |
1267 | /* | |
1268 | * Fill in the new header. | |
1269 | */ | |
1270 | sfp->hdr.count = oldsfp->hdr.count; | |
1271 | sfp->hdr.i8count = 1; | |
1272 | ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent); | |
1273 | XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent); | |
1274 | /* | |
1275 | * Copy the entries field by field. | |
1276 | */ | |
1277 | for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp), | |
1278 | oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp); | |
1279 | i < sfp->hdr.count; | |
1280 | i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep), | |
1281 | oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) { | |
1282 | sfep->namelen = oldsfep->namelen; | |
1283 | sfep->offset = oldsfep->offset; | |
1284 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
1285 | ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, | |
1286 | XFS_DIR2_SF_INUMBERP(oldsfep)); | |
1287 | XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep)); | |
1288 | } | |
1289 | /* | |
1290 | * Clean up the inode. | |
1291 | */ | |
1292 | kmem_free(buf, oldsize); | |
1293 | dp->i_d.di_size = newsize; | |
1294 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1295 | } | |
1296 | #endif /* XFS_BIG_INUMS */ |