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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" |
a4fbe6ab | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
1da177e4 | 23 | #include "xfs_sb.h" |
da353b0d | 24 | #include "xfs_ag.h" |
1da177e4 | 25 | #include "xfs_mount.h" |
57062787 | 26 | #include "xfs_da_format.h" |
a844f451 | 27 | #include "xfs_da_btree.h" |
1da177e4 | 28 | #include "xfs_inode.h" |
239880ef | 29 | #include "xfs_trans.h" |
a844f451 | 30 | #include "xfs_inode_item.h" |
1da177e4 | 31 | #include "xfs_error.h" |
2b9ab5ab | 32 | #include "xfs_dir2.h" |
57926640 | 33 | #include "xfs_dir2_priv.h" |
0b1b213f | 34 | #include "xfs_trace.h" |
a4fbe6ab | 35 | #include "xfs_dinode.h" |
1da177e4 LT |
36 | |
37 | /* | |
38 | * Prototypes for internal functions. | |
39 | */ | |
40 | static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, | |
41 | xfs_dir2_sf_entry_t *sfep, | |
42 | xfs_dir2_data_aoff_t offset, | |
43 | int new_isize); | |
44 | static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, | |
45 | int new_isize); | |
46 | static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, | |
47 | xfs_dir2_sf_entry_t **sfepp, | |
48 | xfs_dir2_data_aoff_t *offsetp); | |
49 | #ifdef DEBUG | |
50 | static void xfs_dir2_sf_check(xfs_da_args_t *args); | |
51 | #else | |
52 | #define xfs_dir2_sf_check(args) | |
53 | #endif /* DEBUG */ | |
54 | #if XFS_BIG_INUMS | |
55 | static void xfs_dir2_sf_toino4(xfs_da_args_t *args); | |
56 | static void xfs_dir2_sf_toino8(xfs_da_args_t *args); | |
57 | #endif /* XFS_BIG_INUMS */ | |
58 | ||
59 | /* | |
60 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
61 | * directory and a header for the sf directory, if it will fit it the | |
62 | * space currently present in the inode. If it won't fit, the output | |
63 | * size is too big (but not accurate). | |
64 | */ | |
65 | int /* size for sf form */ | |
66 | xfs_dir2_block_sfsize( | |
67 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 68 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
69 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
70 | { | |
71 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
72 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
73 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
74 | int count; /* shortform entry count */ | |
75 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
76 | int i; /* block entry index */ | |
77 | int i8count; /* count of big-inode entries */ | |
78 | int isdot; /* entry is "." */ | |
79 | int isdotdot; /* entry is ".." */ | |
80 | xfs_mount_t *mp; /* mount structure pointer */ | |
81 | int namelen; /* total name bytes */ | |
5bde1ba9 | 82 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 | 83 | int size=0; /* total computed size */ |
0cb97766 | 84 | int has_ftype; |
1da177e4 LT |
85 | |
86 | mp = dp->i_mount; | |
87 | ||
0cb97766 DC |
88 | /* |
89 | * if there is a filetype field, add the extra byte to the namelen | |
90 | * for each entry that we see. | |
91 | */ | |
92 | has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0; | |
93 | ||
1da177e4 | 94 | count = i8count = namelen = 0; |
4f6ae1a4 | 95 | btp = xfs_dir2_block_tail_p(mp, hdr); |
bbaaf538 | 96 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
97 | |
98 | /* | |
99 | * Iterate over the block's data entries by using the leaf pointers. | |
100 | */ | |
e922fffa | 101 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 102 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
103 | continue; |
104 | /* | |
105 | * Calculate the pointer to the entry at hand. | |
106 | */ | |
107 | dep = (xfs_dir2_data_entry_t *) | |
4f6ae1a4 | 108 | ((char *)hdr + xfs_dir2_dataptr_to_off(mp, addr)); |
1da177e4 LT |
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) | |
ff9901c1 | 120 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
1da177e4 | 121 | #endif |
0cb97766 | 122 | /* take into account the file type field */ |
1da177e4 LT |
123 | if (!isdot && !isdotdot) { |
124 | count++; | |
0cb97766 | 125 | namelen += dep->namelen + has_ftype; |
1da177e4 | 126 | } else if (isdotdot) |
ff9901c1 | 127 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
128 | /* |
129 | * Calculate the new size, see if we should give up yet. | |
130 | */ | |
bbaaf538 | 131 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
132 | count + /* namelen */ |
133 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
134 | namelen + /* name */ | |
135 | (i8count ? /* inumber */ | |
136 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
137 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
138 | if (size > XFS_IFORK_DSIZE(dp)) | |
139 | return size; /* size value is a failure */ | |
140 | } | |
141 | /* | |
142 | * Create the output header, if it worked. | |
143 | */ | |
144 | sfhp->count = count; | |
145 | sfhp->i8count = i8count; | |
4740175e | 146 | dp->d_ops->sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
147 | return size; |
148 | } | |
149 | ||
150 | /* | |
151 | * Convert a block format directory to shortform. | |
152 | * Caller has already checked that it will fit, and built us a header. | |
153 | */ | |
154 | int /* error */ | |
155 | xfs_dir2_block_to_sf( | |
156 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 | 157 | struct xfs_buf *bp, |
1da177e4 LT |
158 | int size, /* shortform directory size */ |
159 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
160 | { | |
a64b0417 | 161 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
162 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
163 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
164 | xfs_inode_t *dp; /* incore directory inode */ | |
165 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
166 | char *endptr; /* end of data entries */ | |
167 | int error; /* error return value */ | |
168 | int logflags; /* inode logging flags */ | |
169 | xfs_mount_t *mp; /* filesystem mount point */ | |
170 | char *ptr; /* current data pointer */ | |
171 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 172 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
1da177e4 | 173 | |
0b1b213f CH |
174 | trace_xfs_dir2_block_to_sf(args); |
175 | ||
1da177e4 LT |
176 | dp = args->dp; |
177 | mp = dp->i_mount; | |
178 | ||
179 | /* | |
180 | * Make a copy of the block data, so we can shrink the inode | |
181 | * and add local data. | |
182 | */ | |
a64b0417 | 183 | hdr = kmem_alloc(mp->m_dirblksize, KM_SLEEP); |
1d9025e5 | 184 | memcpy(hdr, bp->b_addr, mp->m_dirblksize); |
1da177e4 LT |
185 | logflags = XFS_ILOG_CORE; |
186 | if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) { | |
187 | ASSERT(error != ENOSPC); | |
188 | goto out; | |
189 | } | |
4f6ae1a4 | 190 | |
1da177e4 LT |
191 | /* |
192 | * The buffer is now unconditionally gone, whether | |
193 | * xfs_dir2_shrink_inode worked or not. | |
194 | * | |
195 | * Convert the inode to local format. | |
196 | */ | |
197 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
198 | dp->i_df.if_flags |= XFS_IFINLINE; | |
199 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
200 | ASSERT(dp->i_df.if_bytes == 0); | |
201 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
202 | logflags |= XFS_ILOG_DDATA; | |
203 | /* | |
204 | * Copy the header into the newly allocate local space. | |
205 | */ | |
ac8ba50f | 206 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
bbaaf538 | 207 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
1da177e4 LT |
208 | dp->i_d.di_size = size; |
209 | /* | |
210 | * Set up to loop over the block's entries. | |
211 | */ | |
a64b0417 | 212 | btp = xfs_dir2_block_tail_p(mp, hdr); |
f5f3d9b0 | 213 | ptr = (char *)xfs_dir3_data_entry_p(hdr); |
bbaaf538 CH |
214 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
215 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
216 | /* |
217 | * Loop over the active and unused entries. | |
218 | * Stop when we reach the leaf/tail portion of the block. | |
219 | */ | |
220 | while (ptr < endptr) { | |
221 | /* | |
222 | * If it's unused, just skip over it. | |
223 | */ | |
224 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
225 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
226 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
227 | continue; |
228 | } | |
229 | dep = (xfs_dir2_data_entry_t *)ptr; | |
230 | /* | |
231 | * Skip . | |
232 | */ | |
233 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 234 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
235 | /* |
236 | * Skip .., but make sure the inode number is right. | |
237 | */ | |
238 | else if (dep->namelen == 2 && | |
239 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 240 | ASSERT(be64_to_cpu(dep->inumber) == |
4740175e | 241 | dp->d_ops->sf_get_parent_ino(sfp)); |
1da177e4 LT |
242 | /* |
243 | * Normal entry, copy it into shortform. | |
244 | */ | |
245 | else { | |
246 | sfep->namelen = dep->namelen; | |
bbaaf538 | 247 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 248 | (xfs_dir2_data_aoff_t) |
a64b0417 | 249 | ((char *)dep - (char *)hdr)); |
1da177e4 | 250 | memcpy(sfep->name, dep->name, dep->namelen); |
4740175e DC |
251 | dp->d_ops->sf_put_ino(sfp, sfep, |
252 | be64_to_cpu(dep->inumber)); | |
253 | dp->d_ops->sf_put_ftype(sfep, | |
9d23fc85 | 254 | dp->d_ops->data_get_ftype(dep)); |
8bc38787 | 255 | |
32c5483a | 256 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 | 257 | } |
9d23fc85 | 258 | ptr += dp->d_ops->data_entsize(dep->namelen); |
1da177e4 LT |
259 | } |
260 | ASSERT((char *)sfep - (char *)sfp == size); | |
261 | xfs_dir2_sf_check(args); | |
262 | out: | |
263 | xfs_trans_log_inode(args->trans, dp, logflags); | |
a64b0417 | 264 | kmem_free(hdr); |
1da177e4 LT |
265 | return error; |
266 | } | |
267 | ||
268 | /* | |
269 | * Add a name to a shortform directory. | |
270 | * There are two algorithms, "easy" and "hard" which we decide on | |
271 | * before changing anything. | |
272 | * Convert to block form if necessary, if the new entry won't fit. | |
273 | */ | |
274 | int /* error */ | |
275 | xfs_dir2_sf_addname( | |
276 | xfs_da_args_t *args) /* operation arguments */ | |
277 | { | |
278 | int add_entsize; /* size of the new entry */ | |
279 | xfs_inode_t *dp; /* incore directory inode */ | |
280 | int error; /* error return value */ | |
281 | int incr_isize; /* total change in size */ | |
282 | int new_isize; /* di_size after adding name */ | |
283 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 284 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 LT |
285 | int old_isize; /* di_size before adding name */ |
286 | int pick; /* which algorithm to use */ | |
ac8ba50f | 287 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 288 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 289 | |
0b1b213f CH |
290 | trace_xfs_dir2_sf_addname(args); |
291 | ||
1da177e4 LT |
292 | ASSERT(xfs_dir2_sf_lookup(args) == ENOENT); |
293 | dp = args->dp; | |
294 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
295 | /* | |
296 | * Make sure the shortform value has some of its header. | |
297 | */ | |
298 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
299 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
300 | return XFS_ERROR(EIO); | |
301 | } | |
302 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
303 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
304 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
305 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
306 | /* |
307 | * Compute entry (and change in) size. | |
308 | */ | |
32c5483a | 309 | add_entsize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
310 | incr_isize = add_entsize; |
311 | objchange = 0; | |
312 | #if XFS_BIG_INUMS | |
313 | /* | |
314 | * Do we have to change to 8 byte inodes? | |
315 | */ | |
ac8ba50f | 316 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
317 | /* |
318 | * Yes, adjust the entry size and the total size. | |
319 | */ | |
320 | add_entsize += | |
321 | (uint)sizeof(xfs_dir2_ino8_t) - | |
322 | (uint)sizeof(xfs_dir2_ino4_t); | |
323 | incr_isize += | |
ac8ba50f | 324 | (sfp->count + 2) * |
1da177e4 LT |
325 | ((uint)sizeof(xfs_dir2_ino8_t) - |
326 | (uint)sizeof(xfs_dir2_ino4_t)); | |
327 | objchange = 1; | |
328 | } | |
329 | #endif | |
330 | old_isize = (int)dp->i_d.di_size; | |
331 | new_isize = old_isize + incr_isize; | |
332 | /* | |
333 | * Won't fit as shortform any more (due to size), | |
334 | * or the pick routine says it won't (due to offset values). | |
335 | */ | |
336 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
337 | (pick = | |
338 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
339 | /* | |
340 | * Just checking or no space reservation, it doesn't fit. | |
341 | */ | |
6a178100 | 342 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
1da177e4 LT |
343 | return XFS_ERROR(ENOSPC); |
344 | /* | |
345 | * Convert to block form then add the name. | |
346 | */ | |
347 | error = xfs_dir2_sf_to_block(args); | |
348 | if (error) | |
349 | return error; | |
350 | return xfs_dir2_block_addname(args); | |
351 | } | |
352 | /* | |
353 | * Just checking, it fits. | |
354 | */ | |
6a178100 | 355 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
356 | return 0; |
357 | /* | |
358 | * Do it the easy way - just add it at the end. | |
359 | */ | |
360 | if (pick == 1) | |
361 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
362 | /* | |
363 | * Do it the hard way - look for a place to insert the new entry. | |
364 | * Convert to 8 byte inode numbers first if necessary. | |
365 | */ | |
366 | else { | |
367 | ASSERT(pick == 2); | |
368 | #if XFS_BIG_INUMS | |
369 | if (objchange) | |
370 | xfs_dir2_sf_toino8(args); | |
371 | #endif | |
372 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); | |
373 | } | |
374 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | /* | |
379 | * Add the new entry the "easy" way. | |
380 | * This is copying the old directory and adding the new entry at the end. | |
381 | * Since it's sorted by "offset" we need room after the last offset | |
382 | * that's already there, and then room to convert to a block directory. | |
383 | * This is already checked by the pick routine. | |
384 | */ | |
385 | static void | |
386 | xfs_dir2_sf_addname_easy( | |
387 | xfs_da_args_t *args, /* operation arguments */ | |
388 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
389 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
390 | int new_isize) /* new directory size */ | |
391 | { | |
392 | int byteoff; /* byte offset in sf dir */ | |
393 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 394 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
395 | |
396 | dp = args->dp; | |
397 | ||
ac8ba50f | 398 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
399 | byteoff = (int)((char *)sfep - (char *)sfp); |
400 | /* | |
401 | * Grow the in-inode space. | |
402 | */ | |
32c5483a | 403 | xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen), |
0cb97766 | 404 | XFS_DATA_FORK); |
1da177e4 LT |
405 | /* |
406 | * Need to set up again due to realloc of the inode data. | |
407 | */ | |
ac8ba50f | 408 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
409 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
410 | /* | |
411 | * Fill in the new entry. | |
412 | */ | |
413 | sfep->namelen = args->namelen; | |
bbaaf538 | 414 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 415 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
416 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
417 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1c55cece | 418 | |
1da177e4 LT |
419 | /* |
420 | * Update the header and inode. | |
421 | */ | |
ac8ba50f | 422 | sfp->count++; |
1da177e4 LT |
423 | #if XFS_BIG_INUMS |
424 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) | |
ac8ba50f | 425 | sfp->i8count++; |
1da177e4 LT |
426 | #endif |
427 | dp->i_d.di_size = new_isize; | |
428 | xfs_dir2_sf_check(args); | |
429 | } | |
430 | ||
431 | /* | |
432 | * Add the new entry the "hard" way. | |
433 | * The caller has already converted to 8 byte inode numbers if necessary, | |
434 | * in which case we need to leave the i8count at 1. | |
435 | * Find a hole that the new entry will fit into, and copy | |
436 | * the first part of the entries, the new entry, and the last part of | |
437 | * the entries. | |
438 | */ | |
439 | /* ARGSUSED */ | |
440 | static void | |
441 | xfs_dir2_sf_addname_hard( | |
442 | xfs_da_args_t *args, /* operation arguments */ | |
443 | int objchange, /* changing inode number size */ | |
444 | int new_isize) /* new directory size */ | |
445 | { | |
446 | int add_datasize; /* data size need for new ent */ | |
447 | char *buf; /* buffer for old */ | |
448 | xfs_inode_t *dp; /* incore directory inode */ | |
449 | int eof; /* reached end of old dir */ | |
450 | int nbytes; /* temp for byte copies */ | |
451 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
452 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
453 | int old_isize; /* previous di_size */ | |
454 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 455 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 456 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 457 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
0cb97766 | 458 | struct xfs_mount *mp; |
1da177e4 LT |
459 | |
460 | /* | |
461 | * Copy the old directory to the stack buffer. | |
462 | */ | |
463 | dp = args->dp; | |
0cb97766 | 464 | mp = dp->i_mount; |
1da177e4 | 465 | |
ac8ba50f | 466 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
467 | old_isize = (int)dp->i_d.di_size; |
468 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 469 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
470 | memcpy(oldsfp, sfp, old_isize); |
471 | /* | |
472 | * Loop over the old directory finding the place we're going | |
473 | * to insert the new entry. | |
474 | * If it's going to end up at the end then oldsfep will point there. | |
475 | */ | |
9d23fc85 | 476 | for (offset = dp->d_ops->data_first_offset(), |
bbaaf538 | 477 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
9d23fc85 | 478 | add_datasize = dp->d_ops->data_entsize(args->namelen), |
1da177e4 LT |
479 | eof = (char *)oldsfep == &buf[old_isize]; |
480 | !eof; | |
9d23fc85 | 481 | offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen), |
32c5483a | 482 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep), |
1da177e4 | 483 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 484 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
485 | if (offset + add_datasize <= new_offset) |
486 | break; | |
487 | } | |
488 | /* | |
489 | * Get rid of the old directory, then allocate space for | |
490 | * the new one. We do this so xfs_idata_realloc won't copy | |
491 | * the data. | |
492 | */ | |
493 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
494 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
495 | /* | |
496 | * Reset the pointer since the buffer was reallocated. | |
497 | */ | |
ac8ba50f | 498 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
499 | /* |
500 | * Copy the first part of the directory, including the header. | |
501 | */ | |
502 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
503 | memcpy(sfp, oldsfp, nbytes); | |
504 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
505 | /* | |
506 | * Fill in the new entry, and update the header counts. | |
507 | */ | |
508 | sfep->namelen = args->namelen; | |
bbaaf538 | 509 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 510 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
511 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
512 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
ac8ba50f | 513 | sfp->count++; |
1da177e4 LT |
514 | #if XFS_BIG_INUMS |
515 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) | |
ac8ba50f | 516 | sfp->i8count++; |
1da177e4 LT |
517 | #endif |
518 | /* | |
519 | * If there's more left to copy, do that. | |
520 | */ | |
521 | if (!eof) { | |
32c5483a | 522 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
523 | memcpy(sfep, oldsfep, old_isize - nbytes); |
524 | } | |
f0e2d93c | 525 | kmem_free(buf); |
1da177e4 LT |
526 | dp->i_d.di_size = new_isize; |
527 | xfs_dir2_sf_check(args); | |
528 | } | |
529 | ||
530 | /* | |
531 | * Decide if the new entry will fit at all. | |
532 | * If it will fit, pick between adding the new entry to the end (easy) | |
533 | * or somewhere else (hard). | |
534 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
535 | */ | |
536 | /*ARGSUSED*/ | |
537 | static int /* pick result */ | |
538 | xfs_dir2_sf_addname_pick( | |
539 | xfs_da_args_t *args, /* operation arguments */ | |
540 | int objchange, /* inode # size changes */ | |
541 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
542 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
543 | { | |
544 | xfs_inode_t *dp; /* incore directory inode */ | |
545 | int holefit; /* found hole it will fit in */ | |
546 | int i; /* entry number */ | |
547 | xfs_mount_t *mp; /* filesystem mount point */ | |
548 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
549 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 550 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
551 | int size; /* entry's data size */ |
552 | int used; /* data bytes used */ | |
553 | ||
554 | dp = args->dp; | |
555 | mp = dp->i_mount; | |
556 | ||
ac8ba50f | 557 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
9d23fc85 DC |
558 | size = dp->d_ops->data_entsize(args->namelen); |
559 | offset = dp->d_ops->data_first_offset(); | |
bbaaf538 | 560 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
561 | holefit = 0; |
562 | /* | |
563 | * Loop over sf entries. | |
564 | * Keep track of data offset and whether we've seen a place | |
565 | * to insert the new entry. | |
566 | */ | |
ac8ba50f | 567 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 568 | if (!holefit) |
bbaaf538 CH |
569 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
570 | offset = xfs_dir2_sf_get_offset(sfep) + | |
9d23fc85 | 571 | dp->d_ops->data_entsize(sfep->namelen); |
32c5483a | 572 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
573 | } |
574 | /* | |
575 | * Calculate data bytes used excluding the new entry, if this | |
576 | * was a data block (block form directory). | |
577 | */ | |
578 | used = offset + | |
ac8ba50f | 579 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
580 | (uint)sizeof(xfs_dir2_block_tail_t); |
581 | /* | |
582 | * If it won't fit in a block form then we can't insert it, | |
583 | * we'll go back, convert to block, then try the insert and convert | |
584 | * to leaf. | |
585 | */ | |
586 | if (used + (holefit ? 0 : size) > mp->m_dirblksize) | |
587 | return 0; | |
588 | /* | |
589 | * If changing the inode number size, do it the hard way. | |
590 | */ | |
591 | #if XFS_BIG_INUMS | |
592 | if (objchange) { | |
593 | return 2; | |
594 | } | |
595 | #else | |
596 | ASSERT(objchange == 0); | |
597 | #endif | |
598 | /* | |
599 | * If it won't fit at the end then do it the hard way (use the hole). | |
600 | */ | |
601 | if (used + size > mp->m_dirblksize) | |
602 | return 2; | |
603 | /* | |
604 | * Do it the easy way. | |
605 | */ | |
606 | *sfepp = sfep; | |
607 | *offsetp = offset; | |
608 | return 1; | |
609 | } | |
610 | ||
611 | #ifdef DEBUG | |
612 | /* | |
613 | * Check consistency of shortform directory, assert if bad. | |
614 | */ | |
615 | static void | |
616 | xfs_dir2_sf_check( | |
617 | xfs_da_args_t *args) /* operation arguments */ | |
618 | { | |
619 | xfs_inode_t *dp; /* incore directory inode */ | |
620 | int i; /* entry number */ | |
621 | int i8count; /* number of big inode#s */ | |
622 | xfs_ino_t ino; /* entry inode number */ | |
623 | int offset; /* data offset */ | |
624 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 625 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
0cb97766 | 626 | struct xfs_mount *mp; |
1da177e4 LT |
627 | |
628 | dp = args->dp; | |
0cb97766 | 629 | mp = dp->i_mount; |
1da177e4 | 630 | |
ac8ba50f | 631 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
9d23fc85 | 632 | offset = dp->d_ops->data_first_offset(); |
4740175e | 633 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
634 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
635 | ||
bbaaf538 | 636 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 637 | i < sfp->count; |
32c5483a | 638 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
bbaaf538 | 639 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
4740175e | 640 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
641 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
642 | offset = | |
bbaaf538 | 643 | xfs_dir2_sf_get_offset(sfep) + |
9d23fc85 | 644 | dp->d_ops->data_entsize(sfep->namelen); |
4740175e | 645 | ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX); |
1da177e4 | 646 | } |
ac8ba50f | 647 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
648 | ASSERT(XFS_BIG_INUMS || i8count == 0); |
649 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); | |
650 | ASSERT(offset + | |
ac8ba50f | 651 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
0cb97766 | 652 | (uint)sizeof(xfs_dir2_block_tail_t) <= mp->m_dirblksize); |
1da177e4 LT |
653 | } |
654 | #endif /* DEBUG */ | |
655 | ||
656 | /* | |
657 | * Create a new (shortform) directory. | |
658 | */ | |
659 | int /* error, always 0 */ | |
660 | xfs_dir2_sf_create( | |
661 | xfs_da_args_t *args, /* operation arguments */ | |
662 | xfs_ino_t pino) /* parent inode number */ | |
663 | { | |
664 | xfs_inode_t *dp; /* incore directory inode */ | |
665 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 666 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
667 | int size; /* directory size */ |
668 | ||
0b1b213f CH |
669 | trace_xfs_dir2_sf_create(args); |
670 | ||
1da177e4 LT |
671 | dp = args->dp; |
672 | ||
673 | ASSERT(dp != NULL); | |
674 | ASSERT(dp->i_d.di_size == 0); | |
675 | /* | |
676 | * If it's currently a zero-length extent file, | |
677 | * convert it to local format. | |
678 | */ | |
679 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
680 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
681 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
682 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
683 | dp->i_df.if_flags |= XFS_IFINLINE; | |
684 | } | |
685 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
686 | ASSERT(dp->i_df.if_bytes == 0); | |
687 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 688 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
689 | /* |
690 | * Make a buffer for the data. | |
691 | */ | |
692 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
693 | /* | |
694 | * Fill in the header, | |
695 | */ | |
ac8ba50f CH |
696 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
697 | sfp->i8count = i8count; | |
1da177e4 LT |
698 | /* |
699 | * Now can put in the inode number, since i8count is set. | |
700 | */ | |
4740175e | 701 | dp->d_ops->sf_put_parent_ino(sfp, pino); |
ac8ba50f | 702 | sfp->count = 0; |
1da177e4 LT |
703 | dp->i_d.di_size = size; |
704 | xfs_dir2_sf_check(args); | |
705 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
706 | return 0; | |
707 | } | |
708 | ||
1da177e4 LT |
709 | /* |
710 | * Lookup an entry in a shortform directory. | |
711 | * Returns EEXIST if found, ENOENT if not found. | |
712 | */ | |
713 | int /* error */ | |
714 | xfs_dir2_sf_lookup( | |
715 | xfs_da_args_t *args) /* operation arguments */ | |
716 | { | |
717 | xfs_inode_t *dp; /* incore directory inode */ | |
718 | int i; /* entry index */ | |
384f3ced | 719 | int error; |
1da177e4 | 720 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 721 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 722 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 723 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 724 | |
0b1b213f CH |
725 | trace_xfs_dir2_sf_lookup(args); |
726 | ||
1da177e4 LT |
727 | xfs_dir2_sf_check(args); |
728 | dp = args->dp; | |
729 | ||
730 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
731 | /* | |
732 | * Bail out if the directory is way too short. | |
733 | */ | |
734 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
735 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
736 | return XFS_ERROR(EIO); | |
737 | } | |
738 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
739 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
740 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
741 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
742 | /* |
743 | * Special case for . | |
744 | */ | |
745 | if (args->namelen == 1 && args->name[0] == '.') { | |
746 | args->inumber = dp->i_ino; | |
5163f95a | 747 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 748 | args->filetype = XFS_DIR3_FT_DIR; |
1da177e4 LT |
749 | return XFS_ERROR(EEXIST); |
750 | } | |
751 | /* | |
752 | * Special case for .. | |
753 | */ | |
754 | if (args->namelen == 2 && | |
755 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 756 | args->inumber = dp->d_ops->sf_get_parent_ino(sfp); |
5163f95a | 757 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 758 | args->filetype = XFS_DIR3_FT_DIR; |
1da177e4 LT |
759 | return XFS_ERROR(EEXIST); |
760 | } | |
761 | /* | |
762 | * Loop over all the entries trying to match ours. | |
763 | */ | |
384f3ced | 764 | ci_sfep = NULL; |
ac8ba50f | 765 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 766 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
767 | /* |
768 | * Compare name and if it's an exact match, return the inode | |
769 | * number. If it's the first case-insensitive match, store the | |
770 | * inode number and continue looking for an exact match. | |
771 | */ | |
772 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
773 | sfep->namelen); | |
774 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
775 | args->cmpresult = cmp; | |
4740175e DC |
776 | args->inumber = dp->d_ops->sf_get_ino(sfp, sfep); |
777 | args->filetype = dp->d_ops->sf_get_ftype(sfep); | |
5163f95a BN |
778 | if (cmp == XFS_CMP_EXACT) |
779 | return XFS_ERROR(EEXIST); | |
384f3ced | 780 | ci_sfep = sfep; |
1da177e4 LT |
781 | } |
782 | } | |
6a178100 | 783 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
784 | /* |
785 | * Here, we can only be doing a lookup (not a rename or replace). | |
384f3ced | 786 | * If a case-insensitive match was not found, return ENOENT. |
5163f95a | 787 | */ |
384f3ced BN |
788 | if (!ci_sfep) |
789 | return XFS_ERROR(ENOENT); | |
790 | /* otherwise process the CI match as required by the caller */ | |
791 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
792 | return XFS_ERROR(error); | |
1da177e4 LT |
793 | } |
794 | ||
795 | /* | |
796 | * Remove an entry from a shortform directory. | |
797 | */ | |
798 | int /* error */ | |
799 | xfs_dir2_sf_removename( | |
800 | xfs_da_args_t *args) | |
801 | { | |
802 | int byteoff; /* offset of removed entry */ | |
803 | xfs_inode_t *dp; /* incore directory inode */ | |
804 | int entsize; /* this entry's size */ | |
805 | int i; /* shortform entry index */ | |
806 | int newsize; /* new inode size */ | |
807 | int oldsize; /* old inode size */ | |
808 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 809 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 810 | |
0b1b213f CH |
811 | trace_xfs_dir2_sf_removename(args); |
812 | ||
1da177e4 LT |
813 | dp = args->dp; |
814 | ||
815 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
816 | oldsize = (int)dp->i_d.di_size; | |
817 | /* | |
818 | * Bail out if the directory is way too short. | |
819 | */ | |
820 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
821 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
822 | return XFS_ERROR(EIO); | |
823 | } | |
824 | ASSERT(dp->i_df.if_bytes == oldsize); | |
825 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
826 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
827 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
828 | /* |
829 | * Loop over the old directory entries. | |
830 | * Find the one we're deleting. | |
831 | */ | |
ac8ba50f | 832 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 833 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
834 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
835 | XFS_CMP_EXACT) { | |
4740175e | 836 | ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) == |
8bc38787 | 837 | args->inumber); |
1da177e4 LT |
838 | break; |
839 | } | |
840 | } | |
841 | /* | |
842 | * Didn't find it. | |
843 | */ | |
ac8ba50f | 844 | if (i == sfp->count) |
1da177e4 | 845 | return XFS_ERROR(ENOENT); |
1da177e4 LT |
846 | /* |
847 | * Calculate sizes. | |
848 | */ | |
849 | byteoff = (int)((char *)sfep - (char *)sfp); | |
32c5483a | 850 | entsize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
851 | newsize = oldsize - entsize; |
852 | /* | |
853 | * Copy the part if any after the removed entry, sliding it down. | |
854 | */ | |
855 | if (byteoff + entsize < oldsize) | |
856 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
857 | oldsize - (byteoff + entsize)); | |
858 | /* | |
859 | * Fix up the header and file size. | |
860 | */ | |
ac8ba50f | 861 | sfp->count--; |
1da177e4 LT |
862 | dp->i_d.di_size = newsize; |
863 | /* | |
864 | * Reallocate, making it smaller. | |
865 | */ | |
866 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 867 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
868 | #if XFS_BIG_INUMS |
869 | /* | |
870 | * Are we changing inode number size? | |
871 | */ | |
872 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 873 | if (sfp->i8count == 1) |
1da177e4 LT |
874 | xfs_dir2_sf_toino4(args); |
875 | else | |
ac8ba50f | 876 | sfp->i8count--; |
1da177e4 LT |
877 | } |
878 | #endif | |
879 | xfs_dir2_sf_check(args); | |
880 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
881 | return 0; | |
882 | } | |
883 | ||
884 | /* | |
885 | * Replace the inode number of an entry in a shortform directory. | |
886 | */ | |
887 | int /* error */ | |
888 | xfs_dir2_sf_replace( | |
889 | xfs_da_args_t *args) /* operation arguments */ | |
890 | { | |
891 | xfs_inode_t *dp; /* incore directory inode */ | |
892 | int i; /* entry index */ | |
893 | #if XFS_BIG_INUMS || defined(DEBUG) | |
894 | xfs_ino_t ino=0; /* entry old inode number */ | |
895 | #endif | |
896 | #if XFS_BIG_INUMS | |
897 | int i8elevated; /* sf_toino8 set i8count=1 */ | |
898 | #endif | |
899 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 900 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 901 | |
0b1b213f CH |
902 | trace_xfs_dir2_sf_replace(args); |
903 | ||
1da177e4 LT |
904 | dp = args->dp; |
905 | ||
906 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
907 | /* | |
908 | * Bail out if the shortform directory is way too small. | |
909 | */ | |
910 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
911 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
912 | return XFS_ERROR(EIO); | |
913 | } | |
914 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
915 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
916 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
917 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
918 | #if XFS_BIG_INUMS |
919 | /* | |
920 | * New inode number is large, and need to convert to 8-byte inodes. | |
921 | */ | |
ac8ba50f | 922 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
923 | int error; /* error return value */ |
924 | int newsize; /* new inode size */ | |
925 | ||
926 | newsize = | |
927 | dp->i_df.if_bytes + | |
ac8ba50f | 928 | (sfp->count + 1) * |
1da177e4 LT |
929 | ((uint)sizeof(xfs_dir2_ino8_t) - |
930 | (uint)sizeof(xfs_dir2_ino4_t)); | |
931 | /* | |
932 | * Won't fit as shortform, convert to block then do replace. | |
933 | */ | |
934 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
935 | error = xfs_dir2_sf_to_block(args); | |
936 | if (error) { | |
937 | return error; | |
938 | } | |
939 | return xfs_dir2_block_replace(args); | |
940 | } | |
941 | /* | |
942 | * Still fits, convert to 8-byte now. | |
943 | */ | |
944 | xfs_dir2_sf_toino8(args); | |
945 | i8elevated = 1; | |
ac8ba50f | 946 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
947 | } else |
948 | i8elevated = 0; | |
949 | #endif | |
950 | ASSERT(args->namelen != 1 || args->name[0] != '.'); | |
951 | /* | |
952 | * Replace ..'s entry. | |
953 | */ | |
954 | if (args->namelen == 2 && | |
955 | args->name[0] == '.' && args->name[1] == '.') { | |
956 | #if XFS_BIG_INUMS || defined(DEBUG) | |
4740175e | 957 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
958 | ASSERT(args->inumber != ino); |
959 | #endif | |
4740175e | 960 | dp->d_ops->sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
961 | } |
962 | /* | |
963 | * Normal entry, look for the name. | |
964 | */ | |
965 | else { | |
0cb97766 | 966 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 967 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
968 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
969 | XFS_CMP_EXACT) { | |
1da177e4 | 970 | #if XFS_BIG_INUMS || defined(DEBUG) |
4740175e | 971 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
972 | ASSERT(args->inumber != ino); |
973 | #endif | |
4740175e DC |
974 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
975 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1da177e4 LT |
976 | break; |
977 | } | |
978 | } | |
979 | /* | |
980 | * Didn't find it. | |
981 | */ | |
ac8ba50f | 982 | if (i == sfp->count) { |
6a178100 | 983 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
984 | #if XFS_BIG_INUMS |
985 | if (i8elevated) | |
986 | xfs_dir2_sf_toino4(args); | |
987 | #endif | |
988 | return XFS_ERROR(ENOENT); | |
989 | } | |
990 | } | |
991 | #if XFS_BIG_INUMS | |
992 | /* | |
993 | * See if the old number was large, the new number is small. | |
994 | */ | |
995 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
996 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
997 | /* | |
998 | * And the old count was one, so need to convert to small. | |
999 | */ | |
ac8ba50f | 1000 | if (sfp->i8count == 1) |
1da177e4 LT |
1001 | xfs_dir2_sf_toino4(args); |
1002 | else | |
ac8ba50f | 1003 | sfp->i8count--; |
1da177e4 LT |
1004 | } |
1005 | /* | |
1006 | * See if the old number was small, the new number is large. | |
1007 | */ | |
1008 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
1009 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
1010 | /* | |
1011 | * add to the i8count unless we just converted to 8-byte | |
1012 | * inodes (which does an implied i8count = 1) | |
1013 | */ | |
ac8ba50f | 1014 | ASSERT(sfp->i8count != 0); |
1da177e4 | 1015 | if (!i8elevated) |
ac8ba50f | 1016 | sfp->i8count++; |
1da177e4 LT |
1017 | } |
1018 | #endif | |
1019 | xfs_dir2_sf_check(args); | |
1020 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | #if XFS_BIG_INUMS | |
1025 | /* | |
1026 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1027 | * The last 8-byte inode number is gone, but the count is still 1. | |
1028 | */ | |
1029 | static void | |
1030 | xfs_dir2_sf_toino4( | |
1031 | xfs_da_args_t *args) /* operation arguments */ | |
1032 | { | |
1033 | char *buf; /* old dir's buffer */ | |
1034 | xfs_inode_t *dp; /* incore directory inode */ | |
1035 | int i; /* entry index */ | |
1da177e4 LT |
1036 | int newsize; /* new inode size */ |
1037 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1038 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1039 | int oldsize; /* old inode size */ |
1040 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1041 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1042 | struct xfs_mount *mp; |
1da177e4 | 1043 | |
0b1b213f CH |
1044 | trace_xfs_dir2_sf_toino4(args); |
1045 | ||
1da177e4 | 1046 | dp = args->dp; |
1c55cece | 1047 | mp = dp->i_mount; |
1da177e4 LT |
1048 | |
1049 | /* | |
1050 | * Copy the old directory to the buffer. | |
1051 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1052 | * Don't want xfs_idata_realloc copying the data here. | |
1053 | */ | |
1054 | oldsize = dp->i_df.if_bytes; | |
1055 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1056 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1057 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1058 | memcpy(buf, oldsfp, oldsize); |
1059 | /* | |
1060 | * Compute the new inode size. | |
1061 | */ | |
1062 | newsize = | |
1063 | oldsize - | |
ac8ba50f | 1064 | (oldsfp->count + 1) * |
1da177e4 LT |
1065 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1066 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1067 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1068 | /* | |
1069 | * Reset our pointers, the data has moved. | |
1070 | */ | |
ac8ba50f CH |
1071 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1072 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1073 | /* |
1074 | * Fill in the new header. | |
1075 | */ | |
ac8ba50f CH |
1076 | sfp->count = oldsfp->count; |
1077 | sfp->i8count = 0; | |
4740175e | 1078 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1079 | /* |
1080 | * Copy the entries field by field. | |
1081 | */ | |
bbaaf538 CH |
1082 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1083 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1084 | i < sfp->count; |
32c5483a DC |
1085 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1086 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1087 | sfep->namelen = oldsfep->namelen; |
1088 | sfep->offset = oldsfep->offset; | |
1089 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1090 | dp->d_ops->sf_put_ino(sfp, sfep, |
1091 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1092 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1093 | } |
1094 | /* | |
1095 | * Clean up the inode. | |
1096 | */ | |
f0e2d93c | 1097 | kmem_free(buf); |
1da177e4 LT |
1098 | dp->i_d.di_size = newsize; |
1099 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Convert from 4-byte inode numbers to 8-byte inode numbers. | |
1104 | * The new 8-byte inode number is not there yet, we leave with the | |
1105 | * count 1 but no corresponding entry. | |
1106 | */ | |
1107 | static void | |
1108 | xfs_dir2_sf_toino8( | |
1109 | xfs_da_args_t *args) /* operation arguments */ | |
1110 | { | |
1111 | char *buf; /* old dir's buffer */ | |
1112 | xfs_inode_t *dp; /* incore directory inode */ | |
1113 | int i; /* entry index */ | |
1da177e4 LT |
1114 | int newsize; /* new inode size */ |
1115 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1116 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1117 | int oldsize; /* old inode size */ |
1118 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1119 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1120 | struct xfs_mount *mp; |
1da177e4 | 1121 | |
0b1b213f CH |
1122 | trace_xfs_dir2_sf_toino8(args); |
1123 | ||
1da177e4 | 1124 | dp = args->dp; |
1c55cece | 1125 | mp = dp->i_mount; |
1da177e4 LT |
1126 | |
1127 | /* | |
1128 | * Copy the old directory to the buffer. | |
1129 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1130 | * Don't want xfs_idata_realloc copying the data here. | |
1131 | */ | |
1132 | oldsize = dp->i_df.if_bytes; | |
1133 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1134 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1135 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1136 | memcpy(buf, oldsfp, oldsize); |
1137 | /* | |
1138 | * Compute the new inode size. | |
1139 | */ | |
1140 | newsize = | |
1141 | oldsize + | |
ac8ba50f | 1142 | (oldsfp->count + 1) * |
1da177e4 LT |
1143 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1144 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1145 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1146 | /* | |
1147 | * Reset our pointers, the data has moved. | |
1148 | */ | |
ac8ba50f CH |
1149 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1150 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1151 | /* |
1152 | * Fill in the new header. | |
1153 | */ | |
ac8ba50f CH |
1154 | sfp->count = oldsfp->count; |
1155 | sfp->i8count = 1; | |
4740175e | 1156 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1157 | /* |
1158 | * Copy the entries field by field. | |
1159 | */ | |
bbaaf538 CH |
1160 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1161 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1162 | i < sfp->count; |
32c5483a DC |
1163 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1164 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1165 | sfep->namelen = oldsfep->namelen; |
1166 | sfep->offset = oldsfep->offset; | |
1167 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1168 | dp->d_ops->sf_put_ino(sfp, sfep, |
1169 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1170 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1171 | } |
1172 | /* | |
1173 | * Clean up the inode. | |
1174 | */ | |
f0e2d93c | 1175 | kmem_free(buf); |
1da177e4 LT |
1176 | dp->i_d.di_size = newsize; |
1177 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1178 | } | |
1179 | #endif /* XFS_BIG_INUMS */ |