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" |
a4fbe6ab | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
1da177e4 | 23 | #include "xfs_mount.h" |
57062787 | 24 | #include "xfs_da_format.h" |
a844f451 | 25 | #include "xfs_da_btree.h" |
1da177e4 | 26 | #include "xfs_inode.h" |
239880ef | 27 | #include "xfs_trans.h" |
a844f451 | 28 | #include "xfs_inode_item.h" |
1da177e4 | 29 | #include "xfs_error.h" |
2b9ab5ab | 30 | #include "xfs_dir2.h" |
57926640 | 31 | #include "xfs_dir2_priv.h" |
0b1b213f | 32 | #include "xfs_trace.h" |
1da177e4 LT |
33 | |
34 | /* | |
35 | * Prototypes for internal functions. | |
36 | */ | |
37 | static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, | |
38 | xfs_dir2_sf_entry_t *sfep, | |
39 | xfs_dir2_data_aoff_t offset, | |
40 | int new_isize); | |
41 | static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, | |
42 | int new_isize); | |
43 | static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, | |
44 | xfs_dir2_sf_entry_t **sfepp, | |
45 | xfs_dir2_data_aoff_t *offsetp); | |
46 | #ifdef DEBUG | |
47 | static void xfs_dir2_sf_check(xfs_da_args_t *args); | |
48 | #else | |
49 | #define xfs_dir2_sf_check(args) | |
50 | #endif /* DEBUG */ | |
d5cf09ba | 51 | |
1da177e4 LT |
52 | static void xfs_dir2_sf_toino4(xfs_da_args_t *args); |
53 | static void xfs_dir2_sf_toino8(xfs_da_args_t *args); | |
1da177e4 LT |
54 | |
55 | /* | |
56 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
57 | * directory and a header for the sf directory, if it will fit it the | |
58 | * space currently present in the inode. If it won't fit, the output | |
59 | * size is too big (but not accurate). | |
60 | */ | |
61 | int /* size for sf form */ | |
62 | xfs_dir2_block_sfsize( | |
63 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 64 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
65 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
66 | { | |
67 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
68 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
69 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
70 | int count; /* shortform entry count */ | |
71 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
72 | int i; /* block entry index */ | |
73 | int i8count; /* count of big-inode entries */ | |
74 | int isdot; /* entry is "." */ | |
75 | int isdotdot; /* entry is ".." */ | |
76 | xfs_mount_t *mp; /* mount structure pointer */ | |
77 | int namelen; /* total name bytes */ | |
5bde1ba9 | 78 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 | 79 | int size=0; /* total computed size */ |
0cb97766 | 80 | int has_ftype; |
8f66193c | 81 | struct xfs_da_geometry *geo; |
1da177e4 LT |
82 | |
83 | mp = dp->i_mount; | |
8f66193c | 84 | geo = mp->m_dir_geo; |
1da177e4 | 85 | |
0cb97766 DC |
86 | /* |
87 | * if there is a filetype field, add the extra byte to the namelen | |
88 | * for each entry that we see. | |
89 | */ | |
90 | has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0; | |
91 | ||
1da177e4 | 92 | count = i8count = namelen = 0; |
8f66193c | 93 | btp = xfs_dir2_block_tail_p(geo, hdr); |
bbaaf538 | 94 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * Iterate over the block's data entries by using the leaf pointers. | |
98 | */ | |
e922fffa | 99 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 100 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
101 | continue; |
102 | /* | |
103 | * Calculate the pointer to the entry at hand. | |
104 | */ | |
30028030 | 105 | dep = (xfs_dir2_data_entry_t *)((char *)hdr + |
8f66193c | 106 | xfs_dir2_dataptr_to_off(geo, addr)); |
1da177e4 LT |
107 | /* |
108 | * Detect . and .., so we can special-case them. | |
109 | * . is not included in sf directories. | |
110 | * .. is included by just the parent inode number. | |
111 | */ | |
112 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
113 | isdotdot = | |
114 | dep->namelen == 2 && | |
115 | dep->name[0] == '.' && dep->name[1] == '.'; | |
d5cf09ba | 116 | |
1da177e4 | 117 | if (!isdot) |
ff9901c1 | 118 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
d5cf09ba | 119 | |
0cb97766 | 120 | /* take into account the file type field */ |
1da177e4 LT |
121 | if (!isdot && !isdotdot) { |
122 | count++; | |
0cb97766 | 123 | namelen += dep->namelen + has_ftype; |
1da177e4 | 124 | } else if (isdotdot) |
ff9901c1 | 125 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
126 | /* |
127 | * Calculate the new size, see if we should give up yet. | |
128 | */ | |
8353a649 CH |
129 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
130 | count * 3 * sizeof(u8) + /* namelen + offset */ | |
131 | namelen + /* name */ | |
132 | (i8count ? /* inumber */ | |
266b6969 CH |
133 | count * XFS_INO64_SIZE : |
134 | count * XFS_INO32_SIZE); | |
1da177e4 LT |
135 | if (size > XFS_IFORK_DSIZE(dp)) |
136 | return size; /* size value is a failure */ | |
137 | } | |
138 | /* | |
139 | * Create the output header, if it worked. | |
140 | */ | |
141 | sfhp->count = count; | |
142 | sfhp->i8count = i8count; | |
4740175e | 143 | dp->d_ops->sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
144 | return size; |
145 | } | |
146 | ||
147 | /* | |
148 | * Convert a block format directory to shortform. | |
149 | * Caller has already checked that it will fit, and built us a header. | |
150 | */ | |
151 | int /* error */ | |
152 | xfs_dir2_block_to_sf( | |
153 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 | 154 | struct xfs_buf *bp, |
1da177e4 LT |
155 | int size, /* shortform directory size */ |
156 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
157 | { | |
a64b0417 | 158 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
159 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
160 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
161 | xfs_inode_t *dp; /* incore directory inode */ | |
162 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
163 | char *endptr; /* end of data entries */ | |
164 | int error; /* error return value */ | |
165 | int logflags; /* inode logging flags */ | |
166 | xfs_mount_t *mp; /* filesystem mount point */ | |
167 | char *ptr; /* current data pointer */ | |
168 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 169 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
b3f03bac | 170 | xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */ |
1da177e4 | 171 | |
0b1b213f CH |
172 | trace_xfs_dir2_block_to_sf(args); |
173 | ||
1da177e4 LT |
174 | dp = args->dp; |
175 | mp = dp->i_mount; | |
176 | ||
177 | /* | |
b3f03bac DC |
178 | * allocate a temporary destination buffer the size of the inode |
179 | * to format the data into. Once we have formatted the data, we | |
180 | * can free the block and copy the formatted data into the inode literal | |
181 | * area. | |
1da177e4 | 182 | */ |
b3f03bac DC |
183 | dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP); |
184 | hdr = bp->b_addr; | |
4f6ae1a4 | 185 | |
1da177e4 LT |
186 | /* |
187 | * Copy the header into the newly allocate local space. | |
188 | */ | |
b3f03bac | 189 | sfp = (xfs_dir2_sf_hdr_t *)dst; |
bbaaf538 | 190 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
b3f03bac | 191 | |
1da177e4 LT |
192 | /* |
193 | * Set up to loop over the block's entries. | |
194 | */ | |
8f66193c | 195 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
2ca98774 | 196 | ptr = (char *)dp->d_ops->data_entry_p(hdr); |
bbaaf538 CH |
197 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
198 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
199 | /* |
200 | * Loop over the active and unused entries. | |
201 | * Stop when we reach the leaf/tail portion of the block. | |
202 | */ | |
203 | while (ptr < endptr) { | |
204 | /* | |
205 | * If it's unused, just skip over it. | |
206 | */ | |
207 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
208 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
209 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
210 | continue; |
211 | } | |
212 | dep = (xfs_dir2_data_entry_t *)ptr; | |
213 | /* | |
214 | * Skip . | |
215 | */ | |
216 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 217 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
218 | /* |
219 | * Skip .., but make sure the inode number is right. | |
220 | */ | |
221 | else if (dep->namelen == 2 && | |
222 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 223 | ASSERT(be64_to_cpu(dep->inumber) == |
4740175e | 224 | dp->d_ops->sf_get_parent_ino(sfp)); |
1da177e4 LT |
225 | /* |
226 | * Normal entry, copy it into shortform. | |
227 | */ | |
228 | else { | |
229 | sfep->namelen = dep->namelen; | |
bbaaf538 | 230 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 231 | (xfs_dir2_data_aoff_t) |
a64b0417 | 232 | ((char *)dep - (char *)hdr)); |
1da177e4 | 233 | memcpy(sfep->name, dep->name, dep->namelen); |
4740175e DC |
234 | dp->d_ops->sf_put_ino(sfp, sfep, |
235 | be64_to_cpu(dep->inumber)); | |
236 | dp->d_ops->sf_put_ftype(sfep, | |
9d23fc85 | 237 | dp->d_ops->data_get_ftype(dep)); |
8bc38787 | 238 | |
32c5483a | 239 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 | 240 | } |
9d23fc85 | 241 | ptr += dp->d_ops->data_entsize(dep->namelen); |
1da177e4 LT |
242 | } |
243 | ASSERT((char *)sfep - (char *)sfp == size); | |
b3f03bac DC |
244 | |
245 | /* now we are done with the block, we can shrink the inode */ | |
246 | logflags = XFS_ILOG_CORE; | |
7dda6e86 | 247 | error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp); |
b3f03bac | 248 | if (error) { |
2451337d | 249 | ASSERT(error != -ENOSPC); |
b3f03bac DC |
250 | goto out; |
251 | } | |
252 | ||
253 | /* | |
254 | * The buffer is now unconditionally gone, whether | |
255 | * xfs_dir2_shrink_inode worked or not. | |
256 | * | |
257 | * Convert the inode to local format and copy the data in. | |
258 | */ | |
b3f03bac | 259 | ASSERT(dp->i_df.if_bytes == 0); |
143f4aed CH |
260 | xfs_init_local_fork(dp, XFS_DATA_FORK, dst, size); |
261 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
262 | dp->i_d.di_size = size; | |
b3f03bac DC |
263 | |
264 | logflags |= XFS_ILOG_DDATA; | |
1da177e4 LT |
265 | xfs_dir2_sf_check(args); |
266 | out: | |
267 | xfs_trans_log_inode(args->trans, dp, logflags); | |
b3f03bac | 268 | kmem_free(dst); |
1da177e4 LT |
269 | return error; |
270 | } | |
271 | ||
272 | /* | |
273 | * Add a name to a shortform directory. | |
274 | * There are two algorithms, "easy" and "hard" which we decide on | |
275 | * before changing anything. | |
276 | * Convert to block form if necessary, if the new entry won't fit. | |
277 | */ | |
278 | int /* error */ | |
279 | xfs_dir2_sf_addname( | |
280 | xfs_da_args_t *args) /* operation arguments */ | |
281 | { | |
1da177e4 LT |
282 | xfs_inode_t *dp; /* incore directory inode */ |
283 | int error; /* error return value */ | |
284 | int incr_isize; /* total change in size */ | |
285 | int new_isize; /* di_size after adding name */ | |
286 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 287 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 | 288 | int pick; /* which algorithm to use */ |
ac8ba50f | 289 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 290 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 291 | |
0b1b213f CH |
292 | trace_xfs_dir2_sf_addname(args); |
293 | ||
2451337d | 294 | ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT); |
1da177e4 LT |
295 | dp = args->dp; |
296 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
297 | /* | |
298 | * Make sure the shortform value has some of its header. | |
299 | */ | |
300 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
301 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 302 | return -EIO; |
1da177e4 LT |
303 | } |
304 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
305 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
306 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
307 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
308 | /* |
309 | * Compute entry (and change in) size. | |
310 | */ | |
5e06d148 | 311 | incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 | 312 | objchange = 0; |
d5cf09ba | 313 | |
1da177e4 LT |
314 | /* |
315 | * Do we have to change to 8 byte inodes? | |
316 | */ | |
ac8ba50f | 317 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 | 318 | /* |
5e06d148 | 319 | * Yes, adjust the inode size. old count + (parent + new) |
1da177e4 | 320 | */ |
266b6969 | 321 | incr_isize += (sfp->count + 2) * XFS_INO64_DIFF; |
1da177e4 LT |
322 | objchange = 1; |
323 | } | |
d5cf09ba | 324 | |
5e06d148 | 325 | new_isize = (int)dp->i_d.di_size + incr_isize; |
1da177e4 LT |
326 | /* |
327 | * Won't fit as shortform any more (due to size), | |
328 | * or the pick routine says it won't (due to offset values). | |
329 | */ | |
330 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
331 | (pick = | |
332 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
333 | /* | |
334 | * Just checking or no space reservation, it doesn't fit. | |
335 | */ | |
6a178100 | 336 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
2451337d | 337 | return -ENOSPC; |
1da177e4 LT |
338 | /* |
339 | * Convert to block form then add the name. | |
340 | */ | |
341 | error = xfs_dir2_sf_to_block(args); | |
342 | if (error) | |
343 | return error; | |
344 | return xfs_dir2_block_addname(args); | |
345 | } | |
346 | /* | |
347 | * Just checking, it fits. | |
348 | */ | |
6a178100 | 349 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
350 | return 0; |
351 | /* | |
352 | * Do it the easy way - just add it at the end. | |
353 | */ | |
354 | if (pick == 1) | |
355 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
356 | /* | |
357 | * Do it the hard way - look for a place to insert the new entry. | |
358 | * Convert to 8 byte inode numbers first if necessary. | |
359 | */ | |
360 | else { | |
361 | ASSERT(pick == 2); | |
1da177e4 LT |
362 | if (objchange) |
363 | xfs_dir2_sf_toino8(args); | |
1da177e4 LT |
364 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); |
365 | } | |
366 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
367 | return 0; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Add the new entry the "easy" way. | |
372 | * This is copying the old directory and adding the new entry at the end. | |
373 | * Since it's sorted by "offset" we need room after the last offset | |
374 | * that's already there, and then room to convert to a block directory. | |
375 | * This is already checked by the pick routine. | |
376 | */ | |
377 | static void | |
378 | xfs_dir2_sf_addname_easy( | |
379 | xfs_da_args_t *args, /* operation arguments */ | |
380 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
381 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
382 | int new_isize) /* new directory size */ | |
383 | { | |
384 | int byteoff; /* byte offset in sf dir */ | |
385 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 386 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
387 | |
388 | dp = args->dp; | |
389 | ||
ac8ba50f | 390 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
391 | byteoff = (int)((char *)sfep - (char *)sfp); |
392 | /* | |
393 | * Grow the in-inode space. | |
394 | */ | |
32c5483a | 395 | xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen), |
0cb97766 | 396 | XFS_DATA_FORK); |
1da177e4 LT |
397 | /* |
398 | * Need to set up again due to realloc of the inode data. | |
399 | */ | |
ac8ba50f | 400 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
401 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
402 | /* | |
403 | * Fill in the new entry. | |
404 | */ | |
405 | sfep->namelen = args->namelen; | |
bbaaf538 | 406 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 407 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
408 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
409 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1c55cece | 410 | |
1da177e4 LT |
411 | /* |
412 | * Update the header and inode. | |
413 | */ | |
ac8ba50f | 414 | sfp->count++; |
1da177e4 | 415 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) |
ac8ba50f | 416 | sfp->i8count++; |
1da177e4 LT |
417 | dp->i_d.di_size = new_isize; |
418 | xfs_dir2_sf_check(args); | |
419 | } | |
420 | ||
421 | /* | |
422 | * Add the new entry the "hard" way. | |
423 | * The caller has already converted to 8 byte inode numbers if necessary, | |
424 | * in which case we need to leave the i8count at 1. | |
425 | * Find a hole that the new entry will fit into, and copy | |
426 | * the first part of the entries, the new entry, and the last part of | |
427 | * the entries. | |
428 | */ | |
429 | /* ARGSUSED */ | |
430 | static void | |
431 | xfs_dir2_sf_addname_hard( | |
432 | xfs_da_args_t *args, /* operation arguments */ | |
433 | int objchange, /* changing inode number size */ | |
434 | int new_isize) /* new directory size */ | |
435 | { | |
436 | int add_datasize; /* data size need for new ent */ | |
437 | char *buf; /* buffer for old */ | |
438 | xfs_inode_t *dp; /* incore directory inode */ | |
439 | int eof; /* reached end of old dir */ | |
440 | int nbytes; /* temp for byte copies */ | |
441 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
442 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
443 | int old_isize; /* previous di_size */ | |
444 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 445 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 446 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 447 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
1da177e4 LT |
448 | |
449 | /* | |
450 | * Copy the old directory to the stack buffer. | |
451 | */ | |
452 | dp = args->dp; | |
453 | ||
ac8ba50f | 454 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
455 | old_isize = (int)dp->i_d.di_size; |
456 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 457 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
458 | memcpy(oldsfp, sfp, old_isize); |
459 | /* | |
460 | * Loop over the old directory finding the place we're going | |
461 | * to insert the new entry. | |
462 | * If it's going to end up at the end then oldsfep will point there. | |
463 | */ | |
1c9a5b2e | 464 | for (offset = dp->d_ops->data_first_offset, |
bbaaf538 | 465 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
9d23fc85 | 466 | add_datasize = dp->d_ops->data_entsize(args->namelen), |
1da177e4 LT |
467 | eof = (char *)oldsfep == &buf[old_isize]; |
468 | !eof; | |
9d23fc85 | 469 | offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen), |
32c5483a | 470 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep), |
1da177e4 | 471 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 472 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
473 | if (offset + add_datasize <= new_offset) |
474 | break; | |
475 | } | |
476 | /* | |
477 | * Get rid of the old directory, then allocate space for | |
478 | * the new one. We do this so xfs_idata_realloc won't copy | |
479 | * the data. | |
480 | */ | |
481 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
482 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
483 | /* | |
484 | * Reset the pointer since the buffer was reallocated. | |
485 | */ | |
ac8ba50f | 486 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
487 | /* |
488 | * Copy the first part of the directory, including the header. | |
489 | */ | |
490 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
491 | memcpy(sfp, oldsfp, nbytes); | |
492 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
493 | /* | |
494 | * Fill in the new entry, and update the header counts. | |
495 | */ | |
496 | sfep->namelen = args->namelen; | |
bbaaf538 | 497 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 498 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
499 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
500 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
ac8ba50f | 501 | sfp->count++; |
1da177e4 | 502 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) |
ac8ba50f | 503 | sfp->i8count++; |
1da177e4 LT |
504 | /* |
505 | * If there's more left to copy, do that. | |
506 | */ | |
507 | if (!eof) { | |
32c5483a | 508 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
509 | memcpy(sfep, oldsfep, old_isize - nbytes); |
510 | } | |
f0e2d93c | 511 | kmem_free(buf); |
1da177e4 LT |
512 | dp->i_d.di_size = new_isize; |
513 | xfs_dir2_sf_check(args); | |
514 | } | |
515 | ||
516 | /* | |
517 | * Decide if the new entry will fit at all. | |
518 | * If it will fit, pick between adding the new entry to the end (easy) | |
519 | * or somewhere else (hard). | |
520 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
521 | */ | |
522 | /*ARGSUSED*/ | |
523 | static int /* pick result */ | |
524 | xfs_dir2_sf_addname_pick( | |
525 | xfs_da_args_t *args, /* operation arguments */ | |
526 | int objchange, /* inode # size changes */ | |
527 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
528 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
529 | { | |
530 | xfs_inode_t *dp; /* incore directory inode */ | |
531 | int holefit; /* found hole it will fit in */ | |
532 | int i; /* entry number */ | |
1da177e4 LT |
533 | xfs_dir2_data_aoff_t offset; /* data block offset */ |
534 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 535 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
536 | int size; /* entry's data size */ |
537 | int used; /* data bytes used */ | |
538 | ||
539 | dp = args->dp; | |
1da177e4 | 540 | |
ac8ba50f | 541 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
9d23fc85 | 542 | size = dp->d_ops->data_entsize(args->namelen); |
1c9a5b2e | 543 | offset = dp->d_ops->data_first_offset; |
bbaaf538 | 544 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
545 | holefit = 0; |
546 | /* | |
547 | * Loop over sf entries. | |
548 | * Keep track of data offset and whether we've seen a place | |
549 | * to insert the new entry. | |
550 | */ | |
ac8ba50f | 551 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 552 | if (!holefit) |
bbaaf538 CH |
553 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
554 | offset = xfs_dir2_sf_get_offset(sfep) + | |
9d23fc85 | 555 | dp->d_ops->data_entsize(sfep->namelen); |
32c5483a | 556 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
557 | } |
558 | /* | |
559 | * Calculate data bytes used excluding the new entry, if this | |
560 | * was a data block (block form directory). | |
561 | */ | |
562 | used = offset + | |
ac8ba50f | 563 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
564 | (uint)sizeof(xfs_dir2_block_tail_t); |
565 | /* | |
566 | * If it won't fit in a block form then we can't insert it, | |
567 | * we'll go back, convert to block, then try the insert and convert | |
568 | * to leaf. | |
569 | */ | |
8f66193c | 570 | if (used + (holefit ? 0 : size) > args->geo->blksize) |
1da177e4 LT |
571 | return 0; |
572 | /* | |
573 | * If changing the inode number size, do it the hard way. | |
574 | */ | |
d5cf09ba | 575 | if (objchange) |
1da177e4 | 576 | return 2; |
1da177e4 LT |
577 | /* |
578 | * If it won't fit at the end then do it the hard way (use the hole). | |
579 | */ | |
8f66193c | 580 | if (used + size > args->geo->blksize) |
1da177e4 LT |
581 | return 2; |
582 | /* | |
583 | * Do it the easy way. | |
584 | */ | |
585 | *sfepp = sfep; | |
586 | *offsetp = offset; | |
587 | return 1; | |
588 | } | |
589 | ||
590 | #ifdef DEBUG | |
591 | /* | |
592 | * Check consistency of shortform directory, assert if bad. | |
593 | */ | |
594 | static void | |
595 | xfs_dir2_sf_check( | |
596 | xfs_da_args_t *args) /* operation arguments */ | |
597 | { | |
598 | xfs_inode_t *dp; /* incore directory inode */ | |
599 | int i; /* entry number */ | |
600 | int i8count; /* number of big inode#s */ | |
601 | xfs_ino_t ino; /* entry inode number */ | |
602 | int offset; /* data offset */ | |
603 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 604 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
605 | |
606 | dp = args->dp; | |
607 | ||
ac8ba50f | 608 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1c9a5b2e | 609 | offset = dp->d_ops->data_first_offset; |
4740175e | 610 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
611 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
612 | ||
bbaaf538 | 613 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 614 | i < sfp->count; |
32c5483a | 615 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
bbaaf538 | 616 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
4740175e | 617 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
618 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
619 | offset = | |
bbaaf538 | 620 | xfs_dir2_sf_get_offset(sfep) + |
9d23fc85 | 621 | dp->d_ops->data_entsize(sfep->namelen); |
4740175e | 622 | ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX); |
1da177e4 | 623 | } |
ac8ba50f | 624 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
625 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); |
626 | ASSERT(offset + | |
ac8ba50f | 627 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
8f66193c | 628 | (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize); |
1da177e4 LT |
629 | } |
630 | #endif /* DEBUG */ | |
631 | ||
632 | /* | |
633 | * Create a new (shortform) directory. | |
634 | */ | |
635 | int /* error, always 0 */ | |
636 | xfs_dir2_sf_create( | |
637 | xfs_da_args_t *args, /* operation arguments */ | |
638 | xfs_ino_t pino) /* parent inode number */ | |
639 | { | |
640 | xfs_inode_t *dp; /* incore directory inode */ | |
641 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 642 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
643 | int size; /* directory size */ |
644 | ||
0b1b213f CH |
645 | trace_xfs_dir2_sf_create(args); |
646 | ||
1da177e4 LT |
647 | dp = args->dp; |
648 | ||
649 | ASSERT(dp != NULL); | |
650 | ASSERT(dp->i_d.di_size == 0); | |
651 | /* | |
652 | * If it's currently a zero-length extent file, | |
653 | * convert it to local format. | |
654 | */ | |
655 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
656 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
657 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
658 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
659 | dp->i_df.if_flags |= XFS_IFINLINE; | |
660 | } | |
661 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
662 | ASSERT(dp->i_df.if_bytes == 0); | |
663 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 664 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
665 | /* |
666 | * Make a buffer for the data. | |
667 | */ | |
668 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
669 | /* | |
670 | * Fill in the header, | |
671 | */ | |
ac8ba50f CH |
672 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
673 | sfp->i8count = i8count; | |
1da177e4 LT |
674 | /* |
675 | * Now can put in the inode number, since i8count is set. | |
676 | */ | |
4740175e | 677 | dp->d_ops->sf_put_parent_ino(sfp, pino); |
ac8ba50f | 678 | sfp->count = 0; |
1da177e4 LT |
679 | dp->i_d.di_size = size; |
680 | xfs_dir2_sf_check(args); | |
681 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
682 | return 0; | |
683 | } | |
684 | ||
1da177e4 LT |
685 | /* |
686 | * Lookup an entry in a shortform directory. | |
687 | * Returns EEXIST if found, ENOENT if not found. | |
688 | */ | |
689 | int /* error */ | |
690 | xfs_dir2_sf_lookup( | |
691 | xfs_da_args_t *args) /* operation arguments */ | |
692 | { | |
693 | xfs_inode_t *dp; /* incore directory inode */ | |
694 | int i; /* entry index */ | |
384f3ced | 695 | int error; |
1da177e4 | 696 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 697 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 698 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 699 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 700 | |
0b1b213f CH |
701 | trace_xfs_dir2_sf_lookup(args); |
702 | ||
1da177e4 LT |
703 | xfs_dir2_sf_check(args); |
704 | dp = args->dp; | |
705 | ||
706 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
707 | /* | |
708 | * Bail out if the directory is way too short. | |
709 | */ | |
710 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
711 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 712 | return -EIO; |
1da177e4 LT |
713 | } |
714 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
715 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
716 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
717 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
718 | /* |
719 | * Special case for . | |
720 | */ | |
721 | if (args->namelen == 1 && args->name[0] == '.') { | |
722 | args->inumber = dp->i_ino; | |
5163f95a | 723 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 724 | args->filetype = XFS_DIR3_FT_DIR; |
2451337d | 725 | return -EEXIST; |
1da177e4 LT |
726 | } |
727 | /* | |
728 | * Special case for .. | |
729 | */ | |
730 | if (args->namelen == 2 && | |
731 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 732 | args->inumber = dp->d_ops->sf_get_parent_ino(sfp); |
5163f95a | 733 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 734 | args->filetype = XFS_DIR3_FT_DIR; |
2451337d | 735 | return -EEXIST; |
1da177e4 LT |
736 | } |
737 | /* | |
738 | * Loop over all the entries trying to match ours. | |
739 | */ | |
384f3ced | 740 | ci_sfep = NULL; |
ac8ba50f | 741 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 742 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
743 | /* |
744 | * Compare name and if it's an exact match, return the inode | |
745 | * number. If it's the first case-insensitive match, store the | |
746 | * inode number and continue looking for an exact match. | |
747 | */ | |
748 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
749 | sfep->namelen); | |
750 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
751 | args->cmpresult = cmp; | |
4740175e DC |
752 | args->inumber = dp->d_ops->sf_get_ino(sfp, sfep); |
753 | args->filetype = dp->d_ops->sf_get_ftype(sfep); | |
5163f95a | 754 | if (cmp == XFS_CMP_EXACT) |
2451337d | 755 | return -EEXIST; |
384f3ced | 756 | ci_sfep = sfep; |
1da177e4 LT |
757 | } |
758 | } | |
6a178100 | 759 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
760 | /* |
761 | * Here, we can only be doing a lookup (not a rename or replace). | |
2451337d | 762 | * If a case-insensitive match was not found, return -ENOENT. |
5163f95a | 763 | */ |
384f3ced | 764 | if (!ci_sfep) |
2451337d | 765 | return -ENOENT; |
384f3ced BN |
766 | /* otherwise process the CI match as required by the caller */ |
767 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
b474c7ae | 768 | return error; |
1da177e4 LT |
769 | } |
770 | ||
771 | /* | |
772 | * Remove an entry from a shortform directory. | |
773 | */ | |
774 | int /* error */ | |
775 | xfs_dir2_sf_removename( | |
776 | xfs_da_args_t *args) | |
777 | { | |
778 | int byteoff; /* offset of removed entry */ | |
779 | xfs_inode_t *dp; /* incore directory inode */ | |
780 | int entsize; /* this entry's size */ | |
781 | int i; /* shortform entry index */ | |
782 | int newsize; /* new inode size */ | |
783 | int oldsize; /* old inode size */ | |
784 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 785 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 786 | |
0b1b213f CH |
787 | trace_xfs_dir2_sf_removename(args); |
788 | ||
1da177e4 LT |
789 | dp = args->dp; |
790 | ||
791 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
792 | oldsize = (int)dp->i_d.di_size; | |
793 | /* | |
794 | * Bail out if the directory is way too short. | |
795 | */ | |
796 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
797 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 798 | return -EIO; |
1da177e4 LT |
799 | } |
800 | ASSERT(dp->i_df.if_bytes == oldsize); | |
801 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
802 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
803 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
804 | /* |
805 | * Loop over the old directory entries. | |
806 | * Find the one we're deleting. | |
807 | */ | |
ac8ba50f | 808 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 809 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
810 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
811 | XFS_CMP_EXACT) { | |
4740175e | 812 | ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) == |
8bc38787 | 813 | args->inumber); |
1da177e4 LT |
814 | break; |
815 | } | |
816 | } | |
817 | /* | |
818 | * Didn't find it. | |
819 | */ | |
ac8ba50f | 820 | if (i == sfp->count) |
2451337d | 821 | return -ENOENT; |
1da177e4 LT |
822 | /* |
823 | * Calculate sizes. | |
824 | */ | |
825 | byteoff = (int)((char *)sfep - (char *)sfp); | |
32c5483a | 826 | entsize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
827 | newsize = oldsize - entsize; |
828 | /* | |
829 | * Copy the part if any after the removed entry, sliding it down. | |
830 | */ | |
831 | if (byteoff + entsize < oldsize) | |
832 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
833 | oldsize - (byteoff + entsize)); | |
834 | /* | |
835 | * Fix up the header and file size. | |
836 | */ | |
ac8ba50f | 837 | sfp->count--; |
1da177e4 LT |
838 | dp->i_d.di_size = newsize; |
839 | /* | |
840 | * Reallocate, making it smaller. | |
841 | */ | |
842 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 843 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
844 | /* |
845 | * Are we changing inode number size? | |
846 | */ | |
847 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 848 | if (sfp->i8count == 1) |
1da177e4 LT |
849 | xfs_dir2_sf_toino4(args); |
850 | else | |
ac8ba50f | 851 | sfp->i8count--; |
1da177e4 | 852 | } |
1da177e4 LT |
853 | xfs_dir2_sf_check(args); |
854 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | /* | |
859 | * Replace the inode number of an entry in a shortform directory. | |
860 | */ | |
861 | int /* error */ | |
862 | xfs_dir2_sf_replace( | |
863 | xfs_da_args_t *args) /* operation arguments */ | |
864 | { | |
865 | xfs_inode_t *dp; /* incore directory inode */ | |
866 | int i; /* entry index */ | |
1da177e4 | 867 | xfs_ino_t ino=0; /* entry old inode number */ |
1da177e4 | 868 | int i8elevated; /* sf_toino8 set i8count=1 */ |
1da177e4 | 869 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 870 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 871 | |
0b1b213f CH |
872 | trace_xfs_dir2_sf_replace(args); |
873 | ||
1da177e4 LT |
874 | dp = args->dp; |
875 | ||
876 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
877 | /* | |
878 | * Bail out if the shortform directory is way too small. | |
879 | */ | |
880 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
881 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 882 | return -EIO; |
1da177e4 LT |
883 | } |
884 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
885 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
886 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
887 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
d5cf09ba | 888 | |
1da177e4 LT |
889 | /* |
890 | * New inode number is large, and need to convert to 8-byte inodes. | |
891 | */ | |
ac8ba50f | 892 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
893 | int error; /* error return value */ |
894 | int newsize; /* new inode size */ | |
895 | ||
266b6969 | 896 | newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF; |
1da177e4 LT |
897 | /* |
898 | * Won't fit as shortform, convert to block then do replace. | |
899 | */ | |
900 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
901 | error = xfs_dir2_sf_to_block(args); | |
902 | if (error) { | |
903 | return error; | |
904 | } | |
905 | return xfs_dir2_block_replace(args); | |
906 | } | |
907 | /* | |
908 | * Still fits, convert to 8-byte now. | |
909 | */ | |
910 | xfs_dir2_sf_toino8(args); | |
911 | i8elevated = 1; | |
ac8ba50f | 912 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
913 | } else |
914 | i8elevated = 0; | |
d5cf09ba | 915 | |
1da177e4 LT |
916 | ASSERT(args->namelen != 1 || args->name[0] != '.'); |
917 | /* | |
918 | * Replace ..'s entry. | |
919 | */ | |
920 | if (args->namelen == 2 && | |
921 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 922 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 | 923 | ASSERT(args->inumber != ino); |
4740175e | 924 | dp->d_ops->sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
925 | } |
926 | /* | |
927 | * Normal entry, look for the name. | |
928 | */ | |
929 | else { | |
0cb97766 | 930 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 931 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
932 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
933 | XFS_CMP_EXACT) { | |
4740175e | 934 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 | 935 | ASSERT(args->inumber != ino); |
4740175e DC |
936 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
937 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1da177e4 LT |
938 | break; |
939 | } | |
940 | } | |
941 | /* | |
942 | * Didn't find it. | |
943 | */ | |
ac8ba50f | 944 | if (i == sfp->count) { |
6a178100 | 945 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
946 | if (i8elevated) |
947 | xfs_dir2_sf_toino4(args); | |
2451337d | 948 | return -ENOENT; |
1da177e4 LT |
949 | } |
950 | } | |
1da177e4 LT |
951 | /* |
952 | * See if the old number was large, the new number is small. | |
953 | */ | |
954 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
955 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
956 | /* | |
957 | * And the old count was one, so need to convert to small. | |
958 | */ | |
ac8ba50f | 959 | if (sfp->i8count == 1) |
1da177e4 LT |
960 | xfs_dir2_sf_toino4(args); |
961 | else | |
ac8ba50f | 962 | sfp->i8count--; |
1da177e4 LT |
963 | } |
964 | /* | |
965 | * See if the old number was small, the new number is large. | |
966 | */ | |
967 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
968 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
969 | /* | |
970 | * add to the i8count unless we just converted to 8-byte | |
971 | * inodes (which does an implied i8count = 1) | |
972 | */ | |
ac8ba50f | 973 | ASSERT(sfp->i8count != 0); |
1da177e4 | 974 | if (!i8elevated) |
ac8ba50f | 975 | sfp->i8count++; |
1da177e4 | 976 | } |
1da177e4 LT |
977 | xfs_dir2_sf_check(args); |
978 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
979 | return 0; | |
980 | } | |
981 | ||
1da177e4 LT |
982 | /* |
983 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
984 | * The last 8-byte inode number is gone, but the count is still 1. | |
985 | */ | |
986 | static void | |
987 | xfs_dir2_sf_toino4( | |
988 | xfs_da_args_t *args) /* operation arguments */ | |
989 | { | |
990 | char *buf; /* old dir's buffer */ | |
991 | xfs_inode_t *dp; /* incore directory inode */ | |
992 | int i; /* entry index */ | |
1da177e4 LT |
993 | int newsize; /* new inode size */ |
994 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 995 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
996 | int oldsize; /* old inode size */ |
997 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 998 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 999 | |
0b1b213f CH |
1000 | trace_xfs_dir2_sf_toino4(args); |
1001 | ||
1da177e4 LT |
1002 | dp = args->dp; |
1003 | ||
1004 | /* | |
1005 | * Copy the old directory to the buffer. | |
1006 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1007 | * Don't want xfs_idata_realloc copying the data here. | |
1008 | */ | |
1009 | oldsize = dp->i_df.if_bytes; | |
1010 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1011 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1012 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1013 | memcpy(buf, oldsfp, oldsize); |
1014 | /* | |
1015 | * Compute the new inode size. | |
1016 | */ | |
266b6969 | 1017 | newsize = oldsize - (oldsfp->count + 1) * XFS_INO64_DIFF; |
1da177e4 LT |
1018 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); |
1019 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1020 | /* | |
1021 | * Reset our pointers, the data has moved. | |
1022 | */ | |
ac8ba50f CH |
1023 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1024 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1025 | /* |
1026 | * Fill in the new header. | |
1027 | */ | |
ac8ba50f CH |
1028 | sfp->count = oldsfp->count; |
1029 | sfp->i8count = 0; | |
4740175e | 1030 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1031 | /* |
1032 | * Copy the entries field by field. | |
1033 | */ | |
bbaaf538 CH |
1034 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1035 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1036 | i < sfp->count; |
32c5483a DC |
1037 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1038 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 | 1039 | sfep->namelen = oldsfep->namelen; |
8353a649 | 1040 | memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset)); |
1da177e4 | 1041 | memcpy(sfep->name, oldsfep->name, sfep->namelen); |
4740175e DC |
1042 | dp->d_ops->sf_put_ino(sfp, sfep, |
1043 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1044 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1045 | } |
1046 | /* | |
1047 | * Clean up the inode. | |
1048 | */ | |
f0e2d93c | 1049 | kmem_free(buf); |
1da177e4 LT |
1050 | dp->i_d.di_size = newsize; |
1051 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1052 | } | |
1053 | ||
1054 | /* | |
5e06d148 ES |
1055 | * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers. |
1056 | * The new entry w/ an 8-byte inode number is not there yet; we leave with | |
1057 | * i8count set to 1, but no corresponding 8-byte entry. | |
1da177e4 LT |
1058 | */ |
1059 | static void | |
1060 | xfs_dir2_sf_toino8( | |
1061 | xfs_da_args_t *args) /* operation arguments */ | |
1062 | { | |
1063 | char *buf; /* old dir's buffer */ | |
1064 | xfs_inode_t *dp; /* incore directory inode */ | |
1065 | int i; /* entry index */ | |
1da177e4 LT |
1066 | int newsize; /* new inode size */ |
1067 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1068 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1069 | int oldsize; /* old inode size */ |
1070 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1071 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1072 | |
0b1b213f CH |
1073 | trace_xfs_dir2_sf_toino8(args); |
1074 | ||
1da177e4 LT |
1075 | dp = args->dp; |
1076 | ||
1077 | /* | |
1078 | * Copy the old directory to the buffer. | |
1079 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1080 | * Don't want xfs_idata_realloc copying the data here. | |
1081 | */ | |
1082 | oldsize = dp->i_df.if_bytes; | |
1083 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1084 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1085 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1086 | memcpy(buf, oldsfp, oldsize); |
1087 | /* | |
5e06d148 | 1088 | * Compute the new inode size (nb: entry count + 1 for parent) |
1da177e4 | 1089 | */ |
266b6969 | 1090 | newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF; |
1da177e4 LT |
1091 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); |
1092 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1093 | /* | |
1094 | * Reset our pointers, the data has moved. | |
1095 | */ | |
ac8ba50f CH |
1096 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1097 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1098 | /* |
1099 | * Fill in the new header. | |
1100 | */ | |
ac8ba50f CH |
1101 | sfp->count = oldsfp->count; |
1102 | sfp->i8count = 1; | |
4740175e | 1103 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1104 | /* |
1105 | * Copy the entries field by field. | |
1106 | */ | |
bbaaf538 CH |
1107 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1108 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1109 | i < sfp->count; |
32c5483a DC |
1110 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1111 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 | 1112 | sfep->namelen = oldsfep->namelen; |
8353a649 | 1113 | memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset)); |
1da177e4 | 1114 | memcpy(sfep->name, oldsfep->name, sfep->namelen); |
4740175e DC |
1115 | dp->d_ops->sf_put_ino(sfp, sfep, |
1116 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1117 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1118 | } |
1119 | /* | |
1120 | * Clean up the inode. | |
1121 | */ | |
f0e2d93c | 1122 | kmem_free(buf); |
1da177e4 LT |
1123 | dp->i_d.di_size = newsize; |
1124 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1125 | } |