Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
1da177e4 LT |
21 | #include "xfs_log.h" |
22 | #include "xfs_trans.h" | |
23 | #include "xfs_sb.h" | |
da353b0d | 24 | #include "xfs_ag.h" |
1da177e4 | 25 | #include "xfs_mount.h" |
a844f451 | 26 | #include "xfs_da_btree.h" |
1da177e4 | 27 | #include "xfs_bmap_btree.h" |
1da177e4 | 28 | #include "xfs_dinode.h" |
1da177e4 | 29 | #include "xfs_inode.h" |
a844f451 | 30 | #include "xfs_inode_item.h" |
1da177e4 | 31 | #include "xfs_error.h" |
57926640 | 32 | #include "xfs_dir2_format.h" |
2b9ab5ab | 33 | #include "xfs_dir2.h" |
57926640 | 34 | #include "xfs_dir2_priv.h" |
0b1b213f | 35 | #include "xfs_trace.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 | ||
8bc38787 CH |
59 | /* |
60 | * Inode numbers in short-form directories can come in two versions, | |
61 | * either 4 bytes or 8 bytes wide. These helpers deal with the | |
62 | * two forms transparently by looking at the headers i8count field. | |
218106a1 CH |
63 | * |
64 | * For 64-bit inode number the most significant byte must be zero. | |
8bc38787 CH |
65 | */ |
66 | static xfs_ino_t | |
67 | xfs_dir2_sf_get_ino( | |
ac8ba50f | 68 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
69 | xfs_dir2_inou_t *from) |
70 | { | |
ac8ba50f | 71 | if (hdr->i8count) |
218106a1 | 72 | return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL; |
8bc38787 | 73 | else |
218106a1 | 74 | return get_unaligned_be32(&from->i4.i); |
8bc38787 CH |
75 | } |
76 | ||
77 | static void | |
78 | xfs_dir2_sf_put_ino( | |
ac8ba50f | 79 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
80 | xfs_dir2_inou_t *to, |
81 | xfs_ino_t ino) | |
82 | { | |
218106a1 CH |
83 | ASSERT((ino & 0xff00000000000000ULL) == 0); |
84 | ||
ac8ba50f | 85 | if (hdr->i8count) |
218106a1 | 86 | put_unaligned_be64(ino, &to->i8.i); |
8bc38787 | 87 | else |
218106a1 | 88 | put_unaligned_be32(ino, &to->i4.i); |
8bc38787 CH |
89 | } |
90 | ||
91 | xfs_ino_t | |
92 | xfs_dir2_sf_get_parent_ino( | |
ac8ba50f | 93 | struct xfs_dir2_sf_hdr *hdr) |
8bc38787 | 94 | { |
ac8ba50f | 95 | return xfs_dir2_sf_get_ino(hdr, &hdr->parent); |
8bc38787 CH |
96 | } |
97 | ||
2b9ab5ab | 98 | void |
8bc38787 | 99 | xfs_dir2_sf_put_parent_ino( |
ac8ba50f | 100 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
101 | xfs_ino_t ino) |
102 | { | |
ac8ba50f | 103 | xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino); |
8bc38787 CH |
104 | } |
105 | ||
106 | /* | |
107 | * In short-form directory entries the inode numbers are stored at variable | |
0cb97766 DC |
108 | * offset behind the entry name. If the entry stores a filetype value, then it |
109 | * sits between the name and the inode number. Hence the inode numbers may only | |
110 | * be accessed through the helpers below. | |
8bc38787 CH |
111 | */ |
112 | static xfs_dir2_inou_t * | |
0cb97766 DC |
113 | xfs_dir3_sfe_inop( |
114 | struct xfs_mount *mp, | |
8bc38787 CH |
115 | struct xfs_dir2_sf_entry *sfep) |
116 | { | |
0cb97766 DC |
117 | __uint8_t *ptr = &sfep->name[sfep->namelen]; |
118 | if (xfs_sb_version_hasftype(&mp->m_sb)) | |
119 | ptr++; | |
120 | return (xfs_dir2_inou_t *)ptr; | |
8bc38787 CH |
121 | } |
122 | ||
123 | xfs_ino_t | |
0cb97766 DC |
124 | xfs_dir3_sfe_get_ino( |
125 | struct xfs_mount *mp, | |
ac8ba50f | 126 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
127 | struct xfs_dir2_sf_entry *sfep) |
128 | { | |
0cb97766 | 129 | return xfs_dir2_sf_get_ino(hdr, xfs_dir3_sfe_inop(mp, sfep)); |
8bc38787 CH |
130 | } |
131 | ||
98f7462c | 132 | static void |
0cb97766 DC |
133 | xfs_dir3_sfe_put_ino( |
134 | struct xfs_mount *mp, | |
ac8ba50f | 135 | struct xfs_dir2_sf_hdr *hdr, |
8bc38787 CH |
136 | struct xfs_dir2_sf_entry *sfep, |
137 | xfs_ino_t ino) | |
138 | { | |
0cb97766 | 139 | xfs_dir2_sf_put_ino(hdr, xfs_dir3_sfe_inop(mp, sfep), ino); |
8bc38787 CH |
140 | } |
141 | ||
1da177e4 LT |
142 | /* |
143 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
144 | * directory and a header for the sf directory, if it will fit it the | |
145 | * space currently present in the inode. If it won't fit, the output | |
146 | * size is too big (but not accurate). | |
147 | */ | |
148 | int /* size for sf form */ | |
149 | xfs_dir2_block_sfsize( | |
150 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 151 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
152 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
153 | { | |
154 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
155 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
156 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
157 | int count; /* shortform entry count */ | |
158 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
159 | int i; /* block entry index */ | |
160 | int i8count; /* count of big-inode entries */ | |
161 | int isdot; /* entry is "." */ | |
162 | int isdotdot; /* entry is ".." */ | |
163 | xfs_mount_t *mp; /* mount structure pointer */ | |
164 | int namelen; /* total name bytes */ | |
5bde1ba9 | 165 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 | 166 | int size=0; /* total computed size */ |
0cb97766 | 167 | int has_ftype; |
1da177e4 LT |
168 | |
169 | mp = dp->i_mount; | |
170 | ||
0cb97766 DC |
171 | /* |
172 | * if there is a filetype field, add the extra byte to the namelen | |
173 | * for each entry that we see. | |
174 | */ | |
175 | has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0; | |
176 | ||
1da177e4 | 177 | count = i8count = namelen = 0; |
4f6ae1a4 | 178 | btp = xfs_dir2_block_tail_p(mp, hdr); |
bbaaf538 | 179 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
180 | |
181 | /* | |
182 | * Iterate over the block's data entries by using the leaf pointers. | |
183 | */ | |
e922fffa | 184 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 185 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
186 | continue; |
187 | /* | |
188 | * Calculate the pointer to the entry at hand. | |
189 | */ | |
190 | dep = (xfs_dir2_data_entry_t *) | |
4f6ae1a4 | 191 | ((char *)hdr + xfs_dir2_dataptr_to_off(mp, addr)); |
1da177e4 LT |
192 | /* |
193 | * Detect . and .., so we can special-case them. | |
194 | * . is not included in sf directories. | |
195 | * .. is included by just the parent inode number. | |
196 | */ | |
197 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
198 | isdotdot = | |
199 | dep->namelen == 2 && | |
200 | dep->name[0] == '.' && dep->name[1] == '.'; | |
201 | #if XFS_BIG_INUMS | |
202 | if (!isdot) | |
ff9901c1 | 203 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
1da177e4 | 204 | #endif |
0cb97766 | 205 | /* take into account the file type field */ |
1da177e4 LT |
206 | if (!isdot && !isdotdot) { |
207 | count++; | |
0cb97766 | 208 | namelen += dep->namelen + has_ftype; |
1da177e4 | 209 | } else if (isdotdot) |
ff9901c1 | 210 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
211 | /* |
212 | * Calculate the new size, see if we should give up yet. | |
213 | */ | |
bbaaf538 | 214 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
215 | count + /* namelen */ |
216 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
217 | namelen + /* name */ | |
218 | (i8count ? /* inumber */ | |
219 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
220 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
221 | if (size > XFS_IFORK_DSIZE(dp)) | |
222 | return size; /* size value is a failure */ | |
223 | } | |
224 | /* | |
225 | * Create the output header, if it worked. | |
226 | */ | |
227 | sfhp->count = count; | |
228 | sfhp->i8count = i8count; | |
ac8ba50f | 229 | xfs_dir2_sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
230 | return size; |
231 | } | |
232 | ||
233 | /* | |
234 | * Convert a block format directory to shortform. | |
235 | * Caller has already checked that it will fit, and built us a header. | |
236 | */ | |
237 | int /* error */ | |
238 | xfs_dir2_block_to_sf( | |
239 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 | 240 | struct xfs_buf *bp, |
1da177e4 LT |
241 | int size, /* shortform directory size */ |
242 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
243 | { | |
a64b0417 | 244 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
245 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
246 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
247 | xfs_inode_t *dp; /* incore directory inode */ | |
248 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
249 | char *endptr; /* end of data entries */ | |
250 | int error; /* error return value */ | |
251 | int logflags; /* inode logging flags */ | |
252 | xfs_mount_t *mp; /* filesystem mount point */ | |
253 | char *ptr; /* current data pointer */ | |
254 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 255 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
1da177e4 | 256 | |
0b1b213f CH |
257 | trace_xfs_dir2_block_to_sf(args); |
258 | ||
1da177e4 LT |
259 | dp = args->dp; |
260 | mp = dp->i_mount; | |
261 | ||
262 | /* | |
263 | * Make a copy of the block data, so we can shrink the inode | |
264 | * and add local data. | |
265 | */ | |
a64b0417 | 266 | hdr = kmem_alloc(mp->m_dirblksize, KM_SLEEP); |
1d9025e5 | 267 | memcpy(hdr, bp->b_addr, mp->m_dirblksize); |
1da177e4 LT |
268 | logflags = XFS_ILOG_CORE; |
269 | if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) { | |
270 | ASSERT(error != ENOSPC); | |
271 | goto out; | |
272 | } | |
4f6ae1a4 | 273 | |
1da177e4 LT |
274 | /* |
275 | * The buffer is now unconditionally gone, whether | |
276 | * xfs_dir2_shrink_inode worked or not. | |
277 | * | |
278 | * Convert the inode to local format. | |
279 | */ | |
280 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
281 | dp->i_df.if_flags |= XFS_IFINLINE; | |
282 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
283 | ASSERT(dp->i_df.if_bytes == 0); | |
284 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
285 | logflags |= XFS_ILOG_DDATA; | |
286 | /* | |
287 | * Copy the header into the newly allocate local space. | |
288 | */ | |
ac8ba50f | 289 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
bbaaf538 | 290 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
1da177e4 LT |
291 | dp->i_d.di_size = size; |
292 | /* | |
293 | * Set up to loop over the block's entries. | |
294 | */ | |
a64b0417 | 295 | btp = xfs_dir2_block_tail_p(mp, hdr); |
f5f3d9b0 | 296 | ptr = (char *)xfs_dir3_data_entry_p(hdr); |
bbaaf538 CH |
297 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
298 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
299 | /* |
300 | * Loop over the active and unused entries. | |
301 | * Stop when we reach the leaf/tail portion of the block. | |
302 | */ | |
303 | while (ptr < endptr) { | |
304 | /* | |
305 | * If it's unused, just skip over it. | |
306 | */ | |
307 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
308 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
309 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
310 | continue; |
311 | } | |
312 | dep = (xfs_dir2_data_entry_t *)ptr; | |
313 | /* | |
314 | * Skip . | |
315 | */ | |
316 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 317 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
318 | /* |
319 | * Skip .., but make sure the inode number is right. | |
320 | */ | |
321 | else if (dep->namelen == 2 && | |
322 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 323 | ASSERT(be64_to_cpu(dep->inumber) == |
8bc38787 | 324 | xfs_dir2_sf_get_parent_ino(sfp)); |
1da177e4 LT |
325 | /* |
326 | * Normal entry, copy it into shortform. | |
327 | */ | |
328 | else { | |
329 | sfep->namelen = dep->namelen; | |
bbaaf538 | 330 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 331 | (xfs_dir2_data_aoff_t) |
a64b0417 | 332 | ((char *)dep - (char *)hdr)); |
1da177e4 | 333 | memcpy(sfep->name, dep->name, dep->namelen); |
0cb97766 | 334 | xfs_dir3_sfe_put_ino(mp, sfp, sfep, |
8bc38787 | 335 | be64_to_cpu(dep->inumber)); |
1c55cece DC |
336 | xfs_dir3_sfe_put_ftype(mp, sfp, sfep, |
337 | xfs_dir3_dirent_get_ftype(mp, dep)); | |
8bc38787 | 338 | |
0cb97766 | 339 | sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep); |
1da177e4 | 340 | } |
0cb97766 | 341 | ptr += xfs_dir3_data_entsize(mp, dep->namelen); |
1da177e4 LT |
342 | } |
343 | ASSERT((char *)sfep - (char *)sfp == size); | |
344 | xfs_dir2_sf_check(args); | |
345 | out: | |
346 | xfs_trans_log_inode(args->trans, dp, logflags); | |
a64b0417 | 347 | kmem_free(hdr); |
1da177e4 LT |
348 | return error; |
349 | } | |
350 | ||
351 | /* | |
352 | * Add a name to a shortform directory. | |
353 | * There are two algorithms, "easy" and "hard" which we decide on | |
354 | * before changing anything. | |
355 | * Convert to block form if necessary, if the new entry won't fit. | |
356 | */ | |
357 | int /* error */ | |
358 | xfs_dir2_sf_addname( | |
359 | xfs_da_args_t *args) /* operation arguments */ | |
360 | { | |
361 | int add_entsize; /* size of the new entry */ | |
362 | xfs_inode_t *dp; /* incore directory inode */ | |
363 | int error; /* error return value */ | |
364 | int incr_isize; /* total change in size */ | |
365 | int new_isize; /* di_size after adding name */ | |
366 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 367 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 LT |
368 | int old_isize; /* di_size before adding name */ |
369 | int pick; /* which algorithm to use */ | |
ac8ba50f | 370 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 371 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 372 | |
0b1b213f CH |
373 | trace_xfs_dir2_sf_addname(args); |
374 | ||
1da177e4 LT |
375 | ASSERT(xfs_dir2_sf_lookup(args) == ENOENT); |
376 | dp = args->dp; | |
377 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
378 | /* | |
379 | * Make sure the shortform value has some of its header. | |
380 | */ | |
381 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
382 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
383 | return XFS_ERROR(EIO); | |
384 | } | |
385 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
386 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
387 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
388 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
389 | /* |
390 | * Compute entry (and change in) size. | |
391 | */ | |
0cb97766 | 392 | add_entsize = xfs_dir3_sf_entsize(dp->i_mount, sfp, args->namelen); |
1da177e4 LT |
393 | incr_isize = add_entsize; |
394 | objchange = 0; | |
395 | #if XFS_BIG_INUMS | |
396 | /* | |
397 | * Do we have to change to 8 byte inodes? | |
398 | */ | |
ac8ba50f | 399 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
400 | /* |
401 | * Yes, adjust the entry size and the total size. | |
402 | */ | |
403 | add_entsize += | |
404 | (uint)sizeof(xfs_dir2_ino8_t) - | |
405 | (uint)sizeof(xfs_dir2_ino4_t); | |
406 | incr_isize += | |
ac8ba50f | 407 | (sfp->count + 2) * |
1da177e4 LT |
408 | ((uint)sizeof(xfs_dir2_ino8_t) - |
409 | (uint)sizeof(xfs_dir2_ino4_t)); | |
410 | objchange = 1; | |
411 | } | |
412 | #endif | |
413 | old_isize = (int)dp->i_d.di_size; | |
414 | new_isize = old_isize + incr_isize; | |
415 | /* | |
416 | * Won't fit as shortform any more (due to size), | |
417 | * or the pick routine says it won't (due to offset values). | |
418 | */ | |
419 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
420 | (pick = | |
421 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
422 | /* | |
423 | * Just checking or no space reservation, it doesn't fit. | |
424 | */ | |
6a178100 | 425 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
1da177e4 LT |
426 | return XFS_ERROR(ENOSPC); |
427 | /* | |
428 | * Convert to block form then add the name. | |
429 | */ | |
430 | error = xfs_dir2_sf_to_block(args); | |
431 | if (error) | |
432 | return error; | |
433 | return xfs_dir2_block_addname(args); | |
434 | } | |
435 | /* | |
436 | * Just checking, it fits. | |
437 | */ | |
6a178100 | 438 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
439 | return 0; |
440 | /* | |
441 | * Do it the easy way - just add it at the end. | |
442 | */ | |
443 | if (pick == 1) | |
444 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
445 | /* | |
446 | * Do it the hard way - look for a place to insert the new entry. | |
447 | * Convert to 8 byte inode numbers first if necessary. | |
448 | */ | |
449 | else { | |
450 | ASSERT(pick == 2); | |
451 | #if XFS_BIG_INUMS | |
452 | if (objchange) | |
453 | xfs_dir2_sf_toino8(args); | |
454 | #endif | |
455 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); | |
456 | } | |
457 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
458 | return 0; | |
459 | } | |
460 | ||
461 | /* | |
462 | * Add the new entry the "easy" way. | |
463 | * This is copying the old directory and adding the new entry at the end. | |
464 | * Since it's sorted by "offset" we need room after the last offset | |
465 | * that's already there, and then room to convert to a block directory. | |
466 | * This is already checked by the pick routine. | |
467 | */ | |
468 | static void | |
469 | xfs_dir2_sf_addname_easy( | |
470 | xfs_da_args_t *args, /* operation arguments */ | |
471 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
472 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
473 | int new_isize) /* new directory size */ | |
474 | { | |
475 | int byteoff; /* byte offset in sf dir */ | |
476 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 477 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
478 | |
479 | dp = args->dp; | |
480 | ||
ac8ba50f | 481 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
482 | byteoff = (int)((char *)sfep - (char *)sfp); |
483 | /* | |
484 | * Grow the in-inode space. | |
485 | */ | |
0cb97766 DC |
486 | xfs_idata_realloc(dp, |
487 | xfs_dir3_sf_entsize(dp->i_mount, sfp, args->namelen), | |
488 | XFS_DATA_FORK); | |
1da177e4 LT |
489 | /* |
490 | * Need to set up again due to realloc of the inode data. | |
491 | */ | |
ac8ba50f | 492 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
493 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
494 | /* | |
495 | * Fill in the new entry. | |
496 | */ | |
497 | sfep->namelen = args->namelen; | |
bbaaf538 | 498 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 499 | memcpy(sfep->name, args->name, sfep->namelen); |
0cb97766 | 500 | xfs_dir3_sfe_put_ino(dp->i_mount, sfp, sfep, args->inumber); |
1c55cece DC |
501 | xfs_dir3_sfe_put_ftype(dp->i_mount, sfp, sfep, args->filetype); |
502 | ||
1da177e4 LT |
503 | /* |
504 | * Update the header and inode. | |
505 | */ | |
ac8ba50f | 506 | sfp->count++; |
1da177e4 LT |
507 | #if XFS_BIG_INUMS |
508 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) | |
ac8ba50f | 509 | sfp->i8count++; |
1da177e4 LT |
510 | #endif |
511 | dp->i_d.di_size = new_isize; | |
512 | xfs_dir2_sf_check(args); | |
513 | } | |
514 | ||
515 | /* | |
516 | * Add the new entry the "hard" way. | |
517 | * The caller has already converted to 8 byte inode numbers if necessary, | |
518 | * in which case we need to leave the i8count at 1. | |
519 | * Find a hole that the new entry will fit into, and copy | |
520 | * the first part of the entries, the new entry, and the last part of | |
521 | * the entries. | |
522 | */ | |
523 | /* ARGSUSED */ | |
524 | static void | |
525 | xfs_dir2_sf_addname_hard( | |
526 | xfs_da_args_t *args, /* operation arguments */ | |
527 | int objchange, /* changing inode number size */ | |
528 | int new_isize) /* new directory size */ | |
529 | { | |
530 | int add_datasize; /* data size need for new ent */ | |
531 | char *buf; /* buffer for old */ | |
532 | xfs_inode_t *dp; /* incore directory inode */ | |
533 | int eof; /* reached end of old dir */ | |
534 | int nbytes; /* temp for byte copies */ | |
535 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
536 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
537 | int old_isize; /* previous di_size */ | |
538 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 539 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 540 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 541 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
0cb97766 | 542 | struct xfs_mount *mp; |
1da177e4 LT |
543 | |
544 | /* | |
545 | * Copy the old directory to the stack buffer. | |
546 | */ | |
547 | dp = args->dp; | |
0cb97766 | 548 | mp = dp->i_mount; |
1da177e4 | 549 | |
ac8ba50f | 550 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
551 | old_isize = (int)dp->i_d.di_size; |
552 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 553 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
554 | memcpy(oldsfp, sfp, old_isize); |
555 | /* | |
556 | * Loop over the old directory finding the place we're going | |
557 | * to insert the new entry. | |
558 | * If it's going to end up at the end then oldsfep will point there. | |
559 | */ | |
0cb97766 | 560 | for (offset = XFS_DIR3_DATA_FIRST_OFFSET(mp), |
bbaaf538 | 561 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
0cb97766 | 562 | add_datasize = xfs_dir3_data_entsize(mp, args->namelen), |
1da177e4 LT |
563 | eof = (char *)oldsfep == &buf[old_isize]; |
564 | !eof; | |
0cb97766 DC |
565 | offset = new_offset + xfs_dir3_data_entsize(mp, oldsfep->namelen), |
566 | oldsfep = xfs_dir3_sf_nextentry(mp, oldsfp, oldsfep), | |
1da177e4 | 567 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 568 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
569 | if (offset + add_datasize <= new_offset) |
570 | break; | |
571 | } | |
572 | /* | |
573 | * Get rid of the old directory, then allocate space for | |
574 | * the new one. We do this so xfs_idata_realloc won't copy | |
575 | * the data. | |
576 | */ | |
577 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
578 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
579 | /* | |
580 | * Reset the pointer since the buffer was reallocated. | |
581 | */ | |
ac8ba50f | 582 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
583 | /* |
584 | * Copy the first part of the directory, including the header. | |
585 | */ | |
586 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
587 | memcpy(sfp, oldsfp, nbytes); | |
588 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
589 | /* | |
590 | * Fill in the new entry, and update the header counts. | |
591 | */ | |
592 | sfep->namelen = args->namelen; | |
bbaaf538 | 593 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 594 | memcpy(sfep->name, args->name, sfep->namelen); |
0cb97766 | 595 | xfs_dir3_sfe_put_ino(mp, sfp, sfep, args->inumber); |
1c55cece | 596 | xfs_dir3_sfe_put_ftype(mp, sfp, sfep, args->filetype); |
ac8ba50f | 597 | sfp->count++; |
1da177e4 LT |
598 | #if XFS_BIG_INUMS |
599 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) | |
ac8ba50f | 600 | sfp->i8count++; |
1da177e4 LT |
601 | #endif |
602 | /* | |
603 | * If there's more left to copy, do that. | |
604 | */ | |
605 | if (!eof) { | |
0cb97766 | 606 | sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep); |
1da177e4 LT |
607 | memcpy(sfep, oldsfep, old_isize - nbytes); |
608 | } | |
f0e2d93c | 609 | kmem_free(buf); |
1da177e4 LT |
610 | dp->i_d.di_size = new_isize; |
611 | xfs_dir2_sf_check(args); | |
612 | } | |
613 | ||
614 | /* | |
615 | * Decide if the new entry will fit at all. | |
616 | * If it will fit, pick between adding the new entry to the end (easy) | |
617 | * or somewhere else (hard). | |
618 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
619 | */ | |
620 | /*ARGSUSED*/ | |
621 | static int /* pick result */ | |
622 | xfs_dir2_sf_addname_pick( | |
623 | xfs_da_args_t *args, /* operation arguments */ | |
624 | int objchange, /* inode # size changes */ | |
625 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
626 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
627 | { | |
628 | xfs_inode_t *dp; /* incore directory inode */ | |
629 | int holefit; /* found hole it will fit in */ | |
630 | int i; /* entry number */ | |
631 | xfs_mount_t *mp; /* filesystem mount point */ | |
632 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
633 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 634 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
635 | int size; /* entry's data size */ |
636 | int used; /* data bytes used */ | |
637 | ||
638 | dp = args->dp; | |
639 | mp = dp->i_mount; | |
640 | ||
ac8ba50f | 641 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
0cb97766 | 642 | size = xfs_dir3_data_entsize(mp, args->namelen); |
6b2647a1 | 643 | offset = XFS_DIR3_DATA_FIRST_OFFSET(mp); |
bbaaf538 | 644 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
645 | holefit = 0; |
646 | /* | |
647 | * Loop over sf entries. | |
648 | * Keep track of data offset and whether we've seen a place | |
649 | * to insert the new entry. | |
650 | */ | |
ac8ba50f | 651 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 652 | if (!holefit) |
bbaaf538 CH |
653 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
654 | offset = xfs_dir2_sf_get_offset(sfep) + | |
0cb97766 DC |
655 | xfs_dir3_data_entsize(mp, sfep->namelen); |
656 | sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep); | |
1da177e4 LT |
657 | } |
658 | /* | |
659 | * Calculate data bytes used excluding the new entry, if this | |
660 | * was a data block (block form directory). | |
661 | */ | |
662 | used = offset + | |
ac8ba50f | 663 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
664 | (uint)sizeof(xfs_dir2_block_tail_t); |
665 | /* | |
666 | * If it won't fit in a block form then we can't insert it, | |
667 | * we'll go back, convert to block, then try the insert and convert | |
668 | * to leaf. | |
669 | */ | |
670 | if (used + (holefit ? 0 : size) > mp->m_dirblksize) | |
671 | return 0; | |
672 | /* | |
673 | * If changing the inode number size, do it the hard way. | |
674 | */ | |
675 | #if XFS_BIG_INUMS | |
676 | if (objchange) { | |
677 | return 2; | |
678 | } | |
679 | #else | |
680 | ASSERT(objchange == 0); | |
681 | #endif | |
682 | /* | |
683 | * If it won't fit at the end then do it the hard way (use the hole). | |
684 | */ | |
685 | if (used + size > mp->m_dirblksize) | |
686 | return 2; | |
687 | /* | |
688 | * Do it the easy way. | |
689 | */ | |
690 | *sfepp = sfep; | |
691 | *offsetp = offset; | |
692 | return 1; | |
693 | } | |
694 | ||
695 | #ifdef DEBUG | |
696 | /* | |
697 | * Check consistency of shortform directory, assert if bad. | |
698 | */ | |
699 | static void | |
700 | xfs_dir2_sf_check( | |
701 | xfs_da_args_t *args) /* operation arguments */ | |
702 | { | |
703 | xfs_inode_t *dp; /* incore directory inode */ | |
704 | int i; /* entry number */ | |
705 | int i8count; /* number of big inode#s */ | |
706 | xfs_ino_t ino; /* entry inode number */ | |
707 | int offset; /* data offset */ | |
708 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 709 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
0cb97766 | 710 | struct xfs_mount *mp; |
1da177e4 LT |
711 | |
712 | dp = args->dp; | |
0cb97766 | 713 | mp = dp->i_mount; |
1da177e4 | 714 | |
ac8ba50f | 715 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
0cb97766 | 716 | offset = XFS_DIR3_DATA_FIRST_OFFSET(mp); |
8bc38787 | 717 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
1da177e4 LT |
718 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
719 | ||
bbaaf538 | 720 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 721 | i < sfp->count; |
0cb97766 | 722 | i++, sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep)) { |
bbaaf538 | 723 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
0cb97766 | 724 | ino = xfs_dir3_sfe_get_ino(mp, sfp, sfep); |
1da177e4 LT |
725 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
726 | offset = | |
bbaaf538 | 727 | xfs_dir2_sf_get_offset(sfep) + |
0cb97766 DC |
728 | xfs_dir3_data_entsize(mp, sfep->namelen); |
729 | ASSERT(xfs_dir3_sfe_get_ftype(mp, sfp, sfep) < | |
730 | XFS_DIR3_FT_MAX); | |
1da177e4 | 731 | } |
ac8ba50f | 732 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
733 | ASSERT(XFS_BIG_INUMS || i8count == 0); |
734 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); | |
735 | ASSERT(offset + | |
ac8ba50f | 736 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
0cb97766 | 737 | (uint)sizeof(xfs_dir2_block_tail_t) <= mp->m_dirblksize); |
1da177e4 LT |
738 | } |
739 | #endif /* DEBUG */ | |
740 | ||
741 | /* | |
742 | * Create a new (shortform) directory. | |
743 | */ | |
744 | int /* error, always 0 */ | |
745 | xfs_dir2_sf_create( | |
746 | xfs_da_args_t *args, /* operation arguments */ | |
747 | xfs_ino_t pino) /* parent inode number */ | |
748 | { | |
749 | xfs_inode_t *dp; /* incore directory inode */ | |
750 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 751 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
752 | int size; /* directory size */ |
753 | ||
0b1b213f CH |
754 | trace_xfs_dir2_sf_create(args); |
755 | ||
1da177e4 LT |
756 | dp = args->dp; |
757 | ||
758 | ASSERT(dp != NULL); | |
759 | ASSERT(dp->i_d.di_size == 0); | |
760 | /* | |
761 | * If it's currently a zero-length extent file, | |
762 | * convert it to local format. | |
763 | */ | |
764 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
765 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
766 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
767 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
768 | dp->i_df.if_flags |= XFS_IFINLINE; | |
769 | } | |
770 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
771 | ASSERT(dp->i_df.if_bytes == 0); | |
772 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 773 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
774 | /* |
775 | * Make a buffer for the data. | |
776 | */ | |
777 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
778 | /* | |
779 | * Fill in the header, | |
780 | */ | |
ac8ba50f CH |
781 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
782 | sfp->i8count = i8count; | |
1da177e4 LT |
783 | /* |
784 | * Now can put in the inode number, since i8count is set. | |
785 | */ | |
8bc38787 | 786 | xfs_dir2_sf_put_parent_ino(sfp, pino); |
ac8ba50f | 787 | sfp->count = 0; |
1da177e4 LT |
788 | dp->i_d.di_size = size; |
789 | xfs_dir2_sf_check(args); | |
790 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
791 | return 0; | |
792 | } | |
793 | ||
1da177e4 LT |
794 | /* |
795 | * Lookup an entry in a shortform directory. | |
796 | * Returns EEXIST if found, ENOENT if not found. | |
797 | */ | |
798 | int /* error */ | |
799 | xfs_dir2_sf_lookup( | |
800 | xfs_da_args_t *args) /* operation arguments */ | |
801 | { | |
802 | xfs_inode_t *dp; /* incore directory inode */ | |
803 | int i; /* entry index */ | |
384f3ced | 804 | int error; |
1da177e4 | 805 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 806 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 807 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 808 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 809 | |
0b1b213f CH |
810 | trace_xfs_dir2_sf_lookup(args); |
811 | ||
1da177e4 LT |
812 | xfs_dir2_sf_check(args); |
813 | dp = args->dp; | |
814 | ||
815 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
816 | /* | |
817 | * Bail out if the directory is way too short. | |
818 | */ | |
819 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
820 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
821 | return XFS_ERROR(EIO); | |
822 | } | |
823 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
824 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
825 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
826 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
827 | /* |
828 | * Special case for . | |
829 | */ | |
830 | if (args->namelen == 1 && args->name[0] == '.') { | |
831 | args->inumber = dp->i_ino; | |
5163f95a | 832 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 833 | args->filetype = XFS_DIR3_FT_DIR; |
1da177e4 LT |
834 | return XFS_ERROR(EEXIST); |
835 | } | |
836 | /* | |
837 | * Special case for .. | |
838 | */ | |
839 | if (args->namelen == 2 && | |
840 | args->name[0] == '.' && args->name[1] == '.') { | |
8bc38787 | 841 | args->inumber = xfs_dir2_sf_get_parent_ino(sfp); |
5163f95a | 842 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 843 | args->filetype = XFS_DIR3_FT_DIR; |
1da177e4 LT |
844 | return XFS_ERROR(EEXIST); |
845 | } | |
846 | /* | |
847 | * Loop over all the entries trying to match ours. | |
848 | */ | |
384f3ced | 849 | ci_sfep = NULL; |
ac8ba50f | 850 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
0cb97766 | 851 | i++, sfep = xfs_dir3_sf_nextentry(dp->i_mount, sfp, sfep)) { |
5163f95a BN |
852 | /* |
853 | * Compare name and if it's an exact match, return the inode | |
854 | * number. If it's the first case-insensitive match, store the | |
855 | * inode number and continue looking for an exact match. | |
856 | */ | |
857 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
858 | sfep->namelen); | |
859 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
860 | args->cmpresult = cmp; | |
0cb97766 DC |
861 | args->inumber = xfs_dir3_sfe_get_ino(dp->i_mount, |
862 | sfp, sfep); | |
1c55cece DC |
863 | args->filetype = xfs_dir3_sfe_get_ftype(dp->i_mount, |
864 | sfp, sfep); | |
5163f95a BN |
865 | if (cmp == XFS_CMP_EXACT) |
866 | return XFS_ERROR(EEXIST); | |
384f3ced | 867 | ci_sfep = sfep; |
1da177e4 LT |
868 | } |
869 | } | |
6a178100 | 870 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
871 | /* |
872 | * Here, we can only be doing a lookup (not a rename or replace). | |
384f3ced | 873 | * If a case-insensitive match was not found, return ENOENT. |
5163f95a | 874 | */ |
384f3ced BN |
875 | if (!ci_sfep) |
876 | return XFS_ERROR(ENOENT); | |
877 | /* otherwise process the CI match as required by the caller */ | |
878 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
879 | return XFS_ERROR(error); | |
1da177e4 LT |
880 | } |
881 | ||
882 | /* | |
883 | * Remove an entry from a shortform directory. | |
884 | */ | |
885 | int /* error */ | |
886 | xfs_dir2_sf_removename( | |
887 | xfs_da_args_t *args) | |
888 | { | |
889 | int byteoff; /* offset of removed entry */ | |
890 | xfs_inode_t *dp; /* incore directory inode */ | |
891 | int entsize; /* this entry's size */ | |
892 | int i; /* shortform entry index */ | |
893 | int newsize; /* new inode size */ | |
894 | int oldsize; /* old inode size */ | |
895 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 896 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 897 | |
0b1b213f CH |
898 | trace_xfs_dir2_sf_removename(args); |
899 | ||
1da177e4 LT |
900 | dp = args->dp; |
901 | ||
902 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
903 | oldsize = (int)dp->i_d.di_size; | |
904 | /* | |
905 | * Bail out if the directory is way too short. | |
906 | */ | |
907 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
908 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
909 | return XFS_ERROR(EIO); | |
910 | } | |
911 | ASSERT(dp->i_df.if_bytes == oldsize); | |
912 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
913 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
914 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
915 | /* |
916 | * Loop over the old directory entries. | |
917 | * Find the one we're deleting. | |
918 | */ | |
ac8ba50f | 919 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
0cb97766 | 920 | i++, sfep = xfs_dir3_sf_nextentry(dp->i_mount, sfp, sfep)) { |
5163f95a BN |
921 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
922 | XFS_CMP_EXACT) { | |
0cb97766 | 923 | ASSERT(xfs_dir3_sfe_get_ino(dp->i_mount, sfp, sfep) == |
8bc38787 | 924 | args->inumber); |
1da177e4 LT |
925 | break; |
926 | } | |
927 | } | |
928 | /* | |
929 | * Didn't find it. | |
930 | */ | |
ac8ba50f | 931 | if (i == sfp->count) |
1da177e4 | 932 | return XFS_ERROR(ENOENT); |
1da177e4 LT |
933 | /* |
934 | * Calculate sizes. | |
935 | */ | |
936 | byteoff = (int)((char *)sfep - (char *)sfp); | |
0cb97766 | 937 | entsize = xfs_dir3_sf_entsize(dp->i_mount, sfp, args->namelen); |
1da177e4 LT |
938 | newsize = oldsize - entsize; |
939 | /* | |
940 | * Copy the part if any after the removed entry, sliding it down. | |
941 | */ | |
942 | if (byteoff + entsize < oldsize) | |
943 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
944 | oldsize - (byteoff + entsize)); | |
945 | /* | |
946 | * Fix up the header and file size. | |
947 | */ | |
ac8ba50f | 948 | sfp->count--; |
1da177e4 LT |
949 | dp->i_d.di_size = newsize; |
950 | /* | |
951 | * Reallocate, making it smaller. | |
952 | */ | |
953 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 954 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
955 | #if XFS_BIG_INUMS |
956 | /* | |
957 | * Are we changing inode number size? | |
958 | */ | |
959 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 960 | if (sfp->i8count == 1) |
1da177e4 LT |
961 | xfs_dir2_sf_toino4(args); |
962 | else | |
ac8ba50f | 963 | sfp->i8count--; |
1da177e4 LT |
964 | } |
965 | #endif | |
966 | xfs_dir2_sf_check(args); | |
967 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
968 | return 0; | |
969 | } | |
970 | ||
971 | /* | |
972 | * Replace the inode number of an entry in a shortform directory. | |
973 | */ | |
974 | int /* error */ | |
975 | xfs_dir2_sf_replace( | |
976 | xfs_da_args_t *args) /* operation arguments */ | |
977 | { | |
978 | xfs_inode_t *dp; /* incore directory inode */ | |
979 | int i; /* entry index */ | |
980 | #if XFS_BIG_INUMS || defined(DEBUG) | |
981 | xfs_ino_t ino=0; /* entry old inode number */ | |
982 | #endif | |
983 | #if XFS_BIG_INUMS | |
984 | int i8elevated; /* sf_toino8 set i8count=1 */ | |
985 | #endif | |
986 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 987 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 988 | |
0b1b213f CH |
989 | trace_xfs_dir2_sf_replace(args); |
990 | ||
1da177e4 LT |
991 | dp = args->dp; |
992 | ||
993 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
994 | /* | |
995 | * Bail out if the shortform directory is way too small. | |
996 | */ | |
997 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
998 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
999 | return XFS_ERROR(EIO); | |
1000 | } | |
1001 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
1002 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
1003 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1004 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
1005 | #if XFS_BIG_INUMS |
1006 | /* | |
1007 | * New inode number is large, and need to convert to 8-byte inodes. | |
1008 | */ | |
ac8ba50f | 1009 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
1010 | int error; /* error return value */ |
1011 | int newsize; /* new inode size */ | |
1012 | ||
1013 | newsize = | |
1014 | dp->i_df.if_bytes + | |
ac8ba50f | 1015 | (sfp->count + 1) * |
1da177e4 LT |
1016 | ((uint)sizeof(xfs_dir2_ino8_t) - |
1017 | (uint)sizeof(xfs_dir2_ino4_t)); | |
1018 | /* | |
1019 | * Won't fit as shortform, convert to block then do replace. | |
1020 | */ | |
1021 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
1022 | error = xfs_dir2_sf_to_block(args); | |
1023 | if (error) { | |
1024 | return error; | |
1025 | } | |
1026 | return xfs_dir2_block_replace(args); | |
1027 | } | |
1028 | /* | |
1029 | * Still fits, convert to 8-byte now. | |
1030 | */ | |
1031 | xfs_dir2_sf_toino8(args); | |
1032 | i8elevated = 1; | |
ac8ba50f | 1033 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
1034 | } else |
1035 | i8elevated = 0; | |
1036 | #endif | |
1037 | ASSERT(args->namelen != 1 || args->name[0] != '.'); | |
1038 | /* | |
1039 | * Replace ..'s entry. | |
1040 | */ | |
1041 | if (args->namelen == 2 && | |
1042 | args->name[0] == '.' && args->name[1] == '.') { | |
1043 | #if XFS_BIG_INUMS || defined(DEBUG) | |
8bc38787 | 1044 | ino = xfs_dir2_sf_get_parent_ino(sfp); |
1da177e4 LT |
1045 | ASSERT(args->inumber != ino); |
1046 | #endif | |
8bc38787 | 1047 | xfs_dir2_sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
1048 | } |
1049 | /* | |
1050 | * Normal entry, look for the name. | |
1051 | */ | |
1052 | else { | |
0cb97766 DC |
1053 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
1054 | i++, sfep = xfs_dir3_sf_nextentry(dp->i_mount, sfp, sfep)) { | |
5163f95a BN |
1055 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
1056 | XFS_CMP_EXACT) { | |
1da177e4 | 1057 | #if XFS_BIG_INUMS || defined(DEBUG) |
0cb97766 DC |
1058 | ino = xfs_dir3_sfe_get_ino(dp->i_mount, |
1059 | sfp, sfep); | |
1da177e4 LT |
1060 | ASSERT(args->inumber != ino); |
1061 | #endif | |
0cb97766 DC |
1062 | xfs_dir3_sfe_put_ino(dp->i_mount, sfp, sfep, |
1063 | args->inumber); | |
1c55cece DC |
1064 | xfs_dir3_sfe_put_ftype(dp->i_mount, sfp, sfep, |
1065 | args->filetype); | |
1da177e4 LT |
1066 | break; |
1067 | } | |
1068 | } | |
1069 | /* | |
1070 | * Didn't find it. | |
1071 | */ | |
ac8ba50f | 1072 | if (i == sfp->count) { |
6a178100 | 1073 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
1074 | #if XFS_BIG_INUMS |
1075 | if (i8elevated) | |
1076 | xfs_dir2_sf_toino4(args); | |
1077 | #endif | |
1078 | return XFS_ERROR(ENOENT); | |
1079 | } | |
1080 | } | |
1081 | #if XFS_BIG_INUMS | |
1082 | /* | |
1083 | * See if the old number was large, the new number is small. | |
1084 | */ | |
1085 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
1086 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
1087 | /* | |
1088 | * And the old count was one, so need to convert to small. | |
1089 | */ | |
ac8ba50f | 1090 | if (sfp->i8count == 1) |
1da177e4 LT |
1091 | xfs_dir2_sf_toino4(args); |
1092 | else | |
ac8ba50f | 1093 | sfp->i8count--; |
1da177e4 LT |
1094 | } |
1095 | /* | |
1096 | * See if the old number was small, the new number is large. | |
1097 | */ | |
1098 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
1099 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
1100 | /* | |
1101 | * add to the i8count unless we just converted to 8-byte | |
1102 | * inodes (which does an implied i8count = 1) | |
1103 | */ | |
ac8ba50f | 1104 | ASSERT(sfp->i8count != 0); |
1da177e4 | 1105 | if (!i8elevated) |
ac8ba50f | 1106 | sfp->i8count++; |
1da177e4 LT |
1107 | } |
1108 | #endif | |
1109 | xfs_dir2_sf_check(args); | |
1110 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | #if XFS_BIG_INUMS | |
1115 | /* | |
1116 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1117 | * The last 8-byte inode number is gone, but the count is still 1. | |
1118 | */ | |
1119 | static void | |
1120 | xfs_dir2_sf_toino4( | |
1121 | xfs_da_args_t *args) /* operation arguments */ | |
1122 | { | |
1123 | char *buf; /* old dir's buffer */ | |
1124 | xfs_inode_t *dp; /* incore directory inode */ | |
1125 | int i; /* entry index */ | |
1da177e4 LT |
1126 | int newsize; /* new inode size */ |
1127 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1128 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1129 | int oldsize; /* old inode size */ |
1130 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1131 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1132 | struct xfs_mount *mp; |
1da177e4 | 1133 | |
0b1b213f CH |
1134 | trace_xfs_dir2_sf_toino4(args); |
1135 | ||
1da177e4 | 1136 | dp = args->dp; |
1c55cece | 1137 | mp = dp->i_mount; |
1da177e4 LT |
1138 | |
1139 | /* | |
1140 | * Copy the old directory to the buffer. | |
1141 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1142 | * Don't want xfs_idata_realloc copying the data here. | |
1143 | */ | |
1144 | oldsize = dp->i_df.if_bytes; | |
1145 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1146 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1147 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1148 | memcpy(buf, oldsfp, oldsize); |
1149 | /* | |
1150 | * Compute the new inode size. | |
1151 | */ | |
1152 | newsize = | |
1153 | oldsize - | |
ac8ba50f | 1154 | (oldsfp->count + 1) * |
1da177e4 LT |
1155 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1156 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1157 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1158 | /* | |
1159 | * Reset our pointers, the data has moved. | |
1160 | */ | |
ac8ba50f CH |
1161 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1162 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1163 | /* |
1164 | * Fill in the new header. | |
1165 | */ | |
ac8ba50f CH |
1166 | sfp->count = oldsfp->count; |
1167 | sfp->i8count = 0; | |
8bc38787 | 1168 | xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1169 | /* |
1170 | * Copy the entries field by field. | |
1171 | */ | |
bbaaf538 CH |
1172 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1173 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1174 | i < sfp->count; |
1c55cece DC |
1175 | i++, sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep), |
1176 | oldsfep = xfs_dir3_sf_nextentry(mp, oldsfp, oldsfep)) { | |
1da177e4 LT |
1177 | sfep->namelen = oldsfep->namelen; |
1178 | sfep->offset = oldsfep->offset; | |
1179 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
1c55cece DC |
1180 | xfs_dir3_sfe_put_ino(mp, sfp, sfep, |
1181 | xfs_dir3_sfe_get_ino(mp, oldsfp, oldsfep)); | |
1182 | xfs_dir3_sfe_put_ftype(mp, sfp, sfep, | |
1183 | xfs_dir3_sfe_get_ftype(mp, oldsfp, oldsfep)); | |
1da177e4 LT |
1184 | } |
1185 | /* | |
1186 | * Clean up the inode. | |
1187 | */ | |
f0e2d93c | 1188 | kmem_free(buf); |
1da177e4 LT |
1189 | dp->i_d.di_size = newsize; |
1190 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * Convert from 4-byte inode numbers to 8-byte inode numbers. | |
1195 | * The new 8-byte inode number is not there yet, we leave with the | |
1196 | * count 1 but no corresponding entry. | |
1197 | */ | |
1198 | static void | |
1199 | xfs_dir2_sf_toino8( | |
1200 | xfs_da_args_t *args) /* operation arguments */ | |
1201 | { | |
1202 | char *buf; /* old dir's buffer */ | |
1203 | xfs_inode_t *dp; /* incore directory inode */ | |
1204 | int i; /* entry index */ | |
1da177e4 LT |
1205 | int newsize; /* new inode size */ |
1206 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1207 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1208 | int oldsize; /* old inode size */ |
1209 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1210 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1211 | struct xfs_mount *mp; |
1da177e4 | 1212 | |
0b1b213f CH |
1213 | trace_xfs_dir2_sf_toino8(args); |
1214 | ||
1da177e4 | 1215 | dp = args->dp; |
1c55cece | 1216 | mp = dp->i_mount; |
1da177e4 LT |
1217 | |
1218 | /* | |
1219 | * Copy the old directory to the buffer. | |
1220 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1221 | * Don't want xfs_idata_realloc copying the data here. | |
1222 | */ | |
1223 | oldsize = dp->i_df.if_bytes; | |
1224 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1225 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1226 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1227 | memcpy(buf, oldsfp, oldsize); |
1228 | /* | |
1229 | * Compute the new inode size. | |
1230 | */ | |
1231 | newsize = | |
1232 | oldsize + | |
ac8ba50f | 1233 | (oldsfp->count + 1) * |
1da177e4 LT |
1234 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1235 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1236 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1237 | /* | |
1238 | * Reset our pointers, the data has moved. | |
1239 | */ | |
ac8ba50f CH |
1240 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1241 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1242 | /* |
1243 | * Fill in the new header. | |
1244 | */ | |
ac8ba50f CH |
1245 | sfp->count = oldsfp->count; |
1246 | sfp->i8count = 1; | |
8bc38787 | 1247 | xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1248 | /* |
1249 | * Copy the entries field by field. | |
1250 | */ | |
bbaaf538 CH |
1251 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1252 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1253 | i < sfp->count; |
1c55cece DC |
1254 | i++, sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep), |
1255 | oldsfep = xfs_dir3_sf_nextentry(mp, oldsfp, oldsfep)) { | |
1da177e4 LT |
1256 | sfep->namelen = oldsfep->namelen; |
1257 | sfep->offset = oldsfep->offset; | |
1258 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
1c55cece DC |
1259 | xfs_dir3_sfe_put_ino(mp, sfp, sfep, |
1260 | xfs_dir3_sfe_get_ino(mp, oldsfp, oldsfep)); | |
1261 | xfs_dir3_sfe_put_ftype(mp, sfp, sfep, | |
1262 | xfs_dir3_sfe_get_ftype(mp, oldsfp, oldsfep)); | |
1da177e4 LT |
1263 | } |
1264 | /* | |
1265 | * Clean up the inode. | |
1266 | */ | |
f0e2d93c | 1267 | kmem_free(buf); |
1da177e4 LT |
1268 | dp->i_d.di_size = newsize; |
1269 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1270 | } | |
1271 | #endif /* XFS_BIG_INUMS */ |