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Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
a4fbe6ab | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
1da177e4 | 23 | #include "xfs_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 | */ | |
bbaaf538 | 129 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
130 | count + /* namelen */ |
131 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
132 | namelen + /* name */ | |
133 | (i8count ? /* inumber */ | |
134 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
135 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
136 | if (size > XFS_IFORK_DSIZE(dp)) | |
137 | return size; /* size value is a failure */ | |
138 | } | |
139 | /* | |
140 | * Create the output header, if it worked. | |
141 | */ | |
142 | sfhp->count = count; | |
143 | sfhp->i8count = i8count; | |
4740175e | 144 | dp->d_ops->sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
145 | return size; |
146 | } | |
147 | ||
148 | /* | |
149 | * Convert a block format directory to shortform. | |
150 | * Caller has already checked that it will fit, and built us a header. | |
151 | */ | |
152 | int /* error */ | |
153 | xfs_dir2_block_to_sf( | |
154 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 | 155 | struct xfs_buf *bp, |
1da177e4 LT |
156 | int size, /* shortform directory size */ |
157 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
158 | { | |
a64b0417 | 159 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
160 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
161 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
162 | xfs_inode_t *dp; /* incore directory inode */ | |
163 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
164 | char *endptr; /* end of data entries */ | |
165 | int error; /* error return value */ | |
166 | int logflags; /* inode logging flags */ | |
167 | xfs_mount_t *mp; /* filesystem mount point */ | |
168 | char *ptr; /* current data pointer */ | |
169 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 170 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
b3f03bac | 171 | xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */ |
1da177e4 | 172 | |
0b1b213f CH |
173 | trace_xfs_dir2_block_to_sf(args); |
174 | ||
1da177e4 LT |
175 | dp = args->dp; |
176 | mp = dp->i_mount; | |
177 | ||
178 | /* | |
b3f03bac DC |
179 | * allocate a temporary destination buffer the size of the inode |
180 | * to format the data into. Once we have formatted the data, we | |
181 | * can free the block and copy the formatted data into the inode literal | |
182 | * area. | |
1da177e4 | 183 | */ |
b3f03bac DC |
184 | dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP); |
185 | hdr = bp->b_addr; | |
4f6ae1a4 | 186 | |
1da177e4 LT |
187 | /* |
188 | * Copy the header into the newly allocate local space. | |
189 | */ | |
b3f03bac | 190 | sfp = (xfs_dir2_sf_hdr_t *)dst; |
bbaaf538 | 191 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
b3f03bac | 192 | |
1da177e4 LT |
193 | /* |
194 | * Set up to loop over the block's entries. | |
195 | */ | |
8f66193c | 196 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
2ca98774 | 197 | ptr = (char *)dp->d_ops->data_entry_p(hdr); |
bbaaf538 CH |
198 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
199 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
200 | /* |
201 | * Loop over the active and unused entries. | |
202 | * Stop when we reach the leaf/tail portion of the block. | |
203 | */ | |
204 | while (ptr < endptr) { | |
205 | /* | |
206 | * If it's unused, just skip over it. | |
207 | */ | |
208 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
209 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
210 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
211 | continue; |
212 | } | |
213 | dep = (xfs_dir2_data_entry_t *)ptr; | |
214 | /* | |
215 | * Skip . | |
216 | */ | |
217 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 218 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
219 | /* |
220 | * Skip .., but make sure the inode number is right. | |
221 | */ | |
222 | else if (dep->namelen == 2 && | |
223 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 224 | ASSERT(be64_to_cpu(dep->inumber) == |
4740175e | 225 | dp->d_ops->sf_get_parent_ino(sfp)); |
1da177e4 LT |
226 | /* |
227 | * Normal entry, copy it into shortform. | |
228 | */ | |
229 | else { | |
230 | sfep->namelen = dep->namelen; | |
bbaaf538 | 231 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 232 | (xfs_dir2_data_aoff_t) |
a64b0417 | 233 | ((char *)dep - (char *)hdr)); |
1da177e4 | 234 | memcpy(sfep->name, dep->name, dep->namelen); |
4740175e DC |
235 | dp->d_ops->sf_put_ino(sfp, sfep, |
236 | be64_to_cpu(dep->inumber)); | |
237 | dp->d_ops->sf_put_ftype(sfep, | |
9d23fc85 | 238 | dp->d_ops->data_get_ftype(dep)); |
8bc38787 | 239 | |
32c5483a | 240 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 | 241 | } |
9d23fc85 | 242 | ptr += dp->d_ops->data_entsize(dep->namelen); |
1da177e4 LT |
243 | } |
244 | ASSERT((char *)sfep - (char *)sfp == size); | |
b3f03bac DC |
245 | |
246 | /* now we are done with the block, we can shrink the inode */ | |
247 | logflags = XFS_ILOG_CORE; | |
7dda6e86 | 248 | error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp); |
b3f03bac | 249 | if (error) { |
2451337d | 250 | ASSERT(error != -ENOSPC); |
b3f03bac DC |
251 | goto out; |
252 | } | |
253 | ||
254 | /* | |
255 | * The buffer is now unconditionally gone, whether | |
256 | * xfs_dir2_shrink_inode worked or not. | |
257 | * | |
258 | * Convert the inode to local format and copy the data in. | |
259 | */ | |
260 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
261 | dp->i_df.if_flags |= XFS_IFINLINE; | |
262 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
263 | ASSERT(dp->i_df.if_bytes == 0); | |
264 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
265 | ||
266 | logflags |= XFS_ILOG_DDATA; | |
267 | memcpy(dp->i_df.if_u1.if_data, dst, size); | |
268 | dp->i_d.di_size = size; | |
1da177e4 LT |
269 | xfs_dir2_sf_check(args); |
270 | out: | |
271 | xfs_trans_log_inode(args->trans, dp, logflags); | |
b3f03bac | 272 | kmem_free(dst); |
1da177e4 LT |
273 | return error; |
274 | } | |
275 | ||
276 | /* | |
277 | * Add a name to a shortform directory. | |
278 | * There are two algorithms, "easy" and "hard" which we decide on | |
279 | * before changing anything. | |
280 | * Convert to block form if necessary, if the new entry won't fit. | |
281 | */ | |
282 | int /* error */ | |
283 | xfs_dir2_sf_addname( | |
284 | xfs_da_args_t *args) /* operation arguments */ | |
285 | { | |
1da177e4 LT |
286 | xfs_inode_t *dp; /* incore directory inode */ |
287 | int error; /* error return value */ | |
288 | int incr_isize; /* total change in size */ | |
289 | int new_isize; /* di_size after adding name */ | |
290 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 291 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 | 292 | int pick; /* which algorithm to use */ |
ac8ba50f | 293 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 294 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 295 | |
0b1b213f CH |
296 | trace_xfs_dir2_sf_addname(args); |
297 | ||
2451337d | 298 | ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT); |
1da177e4 LT |
299 | dp = args->dp; |
300 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
301 | /* | |
302 | * Make sure the shortform value has some of its header. | |
303 | */ | |
304 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
305 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 306 | return -EIO; |
1da177e4 LT |
307 | } |
308 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
309 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
310 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
311 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
312 | /* |
313 | * Compute entry (and change in) size. | |
314 | */ | |
5e06d148 | 315 | incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 | 316 | objchange = 0; |
d5cf09ba | 317 | |
1da177e4 LT |
318 | /* |
319 | * Do we have to change to 8 byte inodes? | |
320 | */ | |
ac8ba50f | 321 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 | 322 | /* |
5e06d148 | 323 | * Yes, adjust the inode size. old count + (parent + new) |
1da177e4 | 324 | */ |
1da177e4 | 325 | incr_isize += |
ac8ba50f | 326 | (sfp->count + 2) * |
1da177e4 LT |
327 | ((uint)sizeof(xfs_dir2_ino8_t) - |
328 | (uint)sizeof(xfs_dir2_ino4_t)); | |
329 | objchange = 1; | |
330 | } | |
d5cf09ba | 331 | |
5e06d148 | 332 | new_isize = (int)dp->i_d.di_size + incr_isize; |
1da177e4 LT |
333 | /* |
334 | * Won't fit as shortform any more (due to size), | |
335 | * or the pick routine says it won't (due to offset values). | |
336 | */ | |
337 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
338 | (pick = | |
339 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
340 | /* | |
341 | * Just checking or no space reservation, it doesn't fit. | |
342 | */ | |
6a178100 | 343 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
2451337d | 344 | return -ENOSPC; |
1da177e4 LT |
345 | /* |
346 | * Convert to block form then add the name. | |
347 | */ | |
348 | error = xfs_dir2_sf_to_block(args); | |
349 | if (error) | |
350 | return error; | |
351 | return xfs_dir2_block_addname(args); | |
352 | } | |
353 | /* | |
354 | * Just checking, it fits. | |
355 | */ | |
6a178100 | 356 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
357 | return 0; |
358 | /* | |
359 | * Do it the easy way - just add it at the end. | |
360 | */ | |
361 | if (pick == 1) | |
362 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
363 | /* | |
364 | * Do it the hard way - look for a place to insert the new entry. | |
365 | * Convert to 8 byte inode numbers first if necessary. | |
366 | */ | |
367 | else { | |
368 | ASSERT(pick == 2); | |
1da177e4 LT |
369 | if (objchange) |
370 | xfs_dir2_sf_toino8(args); | |
1da177e4 LT |
371 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); |
372 | } | |
373 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Add the new entry the "easy" way. | |
379 | * This is copying the old directory and adding the new entry at the end. | |
380 | * Since it's sorted by "offset" we need room after the last offset | |
381 | * that's already there, and then room to convert to a block directory. | |
382 | * This is already checked by the pick routine. | |
383 | */ | |
384 | static void | |
385 | xfs_dir2_sf_addname_easy( | |
386 | xfs_da_args_t *args, /* operation arguments */ | |
387 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
388 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
389 | int new_isize) /* new directory size */ | |
390 | { | |
391 | int byteoff; /* byte offset in sf dir */ | |
392 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 393 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
394 | |
395 | dp = args->dp; | |
396 | ||
ac8ba50f | 397 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
398 | byteoff = (int)((char *)sfep - (char *)sfp); |
399 | /* | |
400 | * Grow the in-inode space. | |
401 | */ | |
32c5483a | 402 | xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen), |
0cb97766 | 403 | XFS_DATA_FORK); |
1da177e4 LT |
404 | /* |
405 | * Need to set up again due to realloc of the inode data. | |
406 | */ | |
ac8ba50f | 407 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
408 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
409 | /* | |
410 | * Fill in the new entry. | |
411 | */ | |
412 | sfep->namelen = args->namelen; | |
bbaaf538 | 413 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 414 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
415 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
416 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1c55cece | 417 | |
1da177e4 LT |
418 | /* |
419 | * Update the header and inode. | |
420 | */ | |
ac8ba50f | 421 | sfp->count++; |
1da177e4 | 422 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) |
ac8ba50f | 423 | sfp->i8count++; |
1da177e4 LT |
424 | dp->i_d.di_size = new_isize; |
425 | xfs_dir2_sf_check(args); | |
426 | } | |
427 | ||
428 | /* | |
429 | * Add the new entry the "hard" way. | |
430 | * The caller has already converted to 8 byte inode numbers if necessary, | |
431 | * in which case we need to leave the i8count at 1. | |
432 | * Find a hole that the new entry will fit into, and copy | |
433 | * the first part of the entries, the new entry, and the last part of | |
434 | * the entries. | |
435 | */ | |
436 | /* ARGSUSED */ | |
437 | static void | |
438 | xfs_dir2_sf_addname_hard( | |
439 | xfs_da_args_t *args, /* operation arguments */ | |
440 | int objchange, /* changing inode number size */ | |
441 | int new_isize) /* new directory size */ | |
442 | { | |
443 | int add_datasize; /* data size need for new ent */ | |
444 | char *buf; /* buffer for old */ | |
445 | xfs_inode_t *dp; /* incore directory inode */ | |
446 | int eof; /* reached end of old dir */ | |
447 | int nbytes; /* temp for byte copies */ | |
448 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
449 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
450 | int old_isize; /* previous di_size */ | |
451 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 452 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 453 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 454 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
1da177e4 LT |
455 | |
456 | /* | |
457 | * Copy the old directory to the stack buffer. | |
458 | */ | |
459 | dp = args->dp; | |
460 | ||
ac8ba50f | 461 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
462 | old_isize = (int)dp->i_d.di_size; |
463 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 464 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
465 | memcpy(oldsfp, sfp, old_isize); |
466 | /* | |
467 | * Loop over the old directory finding the place we're going | |
468 | * to insert the new entry. | |
469 | * If it's going to end up at the end then oldsfep will point there. | |
470 | */ | |
1c9a5b2e | 471 | for (offset = dp->d_ops->data_first_offset, |
bbaaf538 | 472 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
9d23fc85 | 473 | add_datasize = dp->d_ops->data_entsize(args->namelen), |
1da177e4 LT |
474 | eof = (char *)oldsfep == &buf[old_isize]; |
475 | !eof; | |
9d23fc85 | 476 | offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen), |
32c5483a | 477 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep), |
1da177e4 | 478 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 479 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
480 | if (offset + add_datasize <= new_offset) |
481 | break; | |
482 | } | |
483 | /* | |
484 | * Get rid of the old directory, then allocate space for | |
485 | * the new one. We do this so xfs_idata_realloc won't copy | |
486 | * the data. | |
487 | */ | |
488 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
489 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
490 | /* | |
491 | * Reset the pointer since the buffer was reallocated. | |
492 | */ | |
ac8ba50f | 493 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
494 | /* |
495 | * Copy the first part of the directory, including the header. | |
496 | */ | |
497 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
498 | memcpy(sfp, oldsfp, nbytes); | |
499 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
500 | /* | |
501 | * Fill in the new entry, and update the header counts. | |
502 | */ | |
503 | sfep->namelen = args->namelen; | |
bbaaf538 | 504 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 505 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
506 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
507 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
ac8ba50f | 508 | sfp->count++; |
1da177e4 | 509 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) |
ac8ba50f | 510 | sfp->i8count++; |
1da177e4 LT |
511 | /* |
512 | * If there's more left to copy, do that. | |
513 | */ | |
514 | if (!eof) { | |
32c5483a | 515 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
516 | memcpy(sfep, oldsfep, old_isize - nbytes); |
517 | } | |
f0e2d93c | 518 | kmem_free(buf); |
1da177e4 LT |
519 | dp->i_d.di_size = new_isize; |
520 | xfs_dir2_sf_check(args); | |
521 | } | |
522 | ||
523 | /* | |
524 | * Decide if the new entry will fit at all. | |
525 | * If it will fit, pick between adding the new entry to the end (easy) | |
526 | * or somewhere else (hard). | |
527 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
528 | */ | |
529 | /*ARGSUSED*/ | |
530 | static int /* pick result */ | |
531 | xfs_dir2_sf_addname_pick( | |
532 | xfs_da_args_t *args, /* operation arguments */ | |
533 | int objchange, /* inode # size changes */ | |
534 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
535 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
536 | { | |
537 | xfs_inode_t *dp; /* incore directory inode */ | |
538 | int holefit; /* found hole it will fit in */ | |
539 | int i; /* entry number */ | |
1da177e4 LT |
540 | xfs_dir2_data_aoff_t offset; /* data block offset */ |
541 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 542 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
543 | int size; /* entry's data size */ |
544 | int used; /* data bytes used */ | |
545 | ||
546 | dp = args->dp; | |
1da177e4 | 547 | |
ac8ba50f | 548 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
9d23fc85 | 549 | size = dp->d_ops->data_entsize(args->namelen); |
1c9a5b2e | 550 | offset = dp->d_ops->data_first_offset; |
bbaaf538 | 551 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
552 | holefit = 0; |
553 | /* | |
554 | * Loop over sf entries. | |
555 | * Keep track of data offset and whether we've seen a place | |
556 | * to insert the new entry. | |
557 | */ | |
ac8ba50f | 558 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 559 | if (!holefit) |
bbaaf538 CH |
560 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
561 | offset = xfs_dir2_sf_get_offset(sfep) + | |
9d23fc85 | 562 | dp->d_ops->data_entsize(sfep->namelen); |
32c5483a | 563 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
564 | } |
565 | /* | |
566 | * Calculate data bytes used excluding the new entry, if this | |
567 | * was a data block (block form directory). | |
568 | */ | |
569 | used = offset + | |
ac8ba50f | 570 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
571 | (uint)sizeof(xfs_dir2_block_tail_t); |
572 | /* | |
573 | * If it won't fit in a block form then we can't insert it, | |
574 | * we'll go back, convert to block, then try the insert and convert | |
575 | * to leaf. | |
576 | */ | |
8f66193c | 577 | if (used + (holefit ? 0 : size) > args->geo->blksize) |
1da177e4 LT |
578 | return 0; |
579 | /* | |
580 | * If changing the inode number size, do it the hard way. | |
581 | */ | |
d5cf09ba | 582 | if (objchange) |
1da177e4 | 583 | return 2; |
1da177e4 LT |
584 | /* |
585 | * If it won't fit at the end then do it the hard way (use the hole). | |
586 | */ | |
8f66193c | 587 | if (used + size > args->geo->blksize) |
1da177e4 LT |
588 | return 2; |
589 | /* | |
590 | * Do it the easy way. | |
591 | */ | |
592 | *sfepp = sfep; | |
593 | *offsetp = offset; | |
594 | return 1; | |
595 | } | |
596 | ||
597 | #ifdef DEBUG | |
598 | /* | |
599 | * Check consistency of shortform directory, assert if bad. | |
600 | */ | |
601 | static void | |
602 | xfs_dir2_sf_check( | |
603 | xfs_da_args_t *args) /* operation arguments */ | |
604 | { | |
605 | xfs_inode_t *dp; /* incore directory inode */ | |
606 | int i; /* entry number */ | |
607 | int i8count; /* number of big inode#s */ | |
608 | xfs_ino_t ino; /* entry inode number */ | |
609 | int offset; /* data offset */ | |
610 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 611 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
612 | |
613 | dp = args->dp; | |
614 | ||
ac8ba50f | 615 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1c9a5b2e | 616 | offset = dp->d_ops->data_first_offset; |
4740175e | 617 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
618 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
619 | ||
bbaaf538 | 620 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 621 | i < sfp->count; |
32c5483a | 622 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
bbaaf538 | 623 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
4740175e | 624 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
625 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
626 | offset = | |
bbaaf538 | 627 | xfs_dir2_sf_get_offset(sfep) + |
9d23fc85 | 628 | dp->d_ops->data_entsize(sfep->namelen); |
4740175e | 629 | ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX); |
1da177e4 | 630 | } |
ac8ba50f | 631 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
632 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); |
633 | ASSERT(offset + | |
ac8ba50f | 634 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
8f66193c | 635 | (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize); |
1da177e4 LT |
636 | } |
637 | #endif /* DEBUG */ | |
638 | ||
639 | /* | |
640 | * Create a new (shortform) directory. | |
641 | */ | |
642 | int /* error, always 0 */ | |
643 | xfs_dir2_sf_create( | |
644 | xfs_da_args_t *args, /* operation arguments */ | |
645 | xfs_ino_t pino) /* parent inode number */ | |
646 | { | |
647 | xfs_inode_t *dp; /* incore directory inode */ | |
648 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 649 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
650 | int size; /* directory size */ |
651 | ||
0b1b213f CH |
652 | trace_xfs_dir2_sf_create(args); |
653 | ||
1da177e4 LT |
654 | dp = args->dp; |
655 | ||
656 | ASSERT(dp != NULL); | |
657 | ASSERT(dp->i_d.di_size == 0); | |
658 | /* | |
659 | * If it's currently a zero-length extent file, | |
660 | * convert it to local format. | |
661 | */ | |
662 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
663 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
664 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
665 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
666 | dp->i_df.if_flags |= XFS_IFINLINE; | |
667 | } | |
668 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
669 | ASSERT(dp->i_df.if_bytes == 0); | |
670 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 671 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
672 | /* |
673 | * Make a buffer for the data. | |
674 | */ | |
675 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
676 | /* | |
677 | * Fill in the header, | |
678 | */ | |
ac8ba50f CH |
679 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
680 | sfp->i8count = i8count; | |
1da177e4 LT |
681 | /* |
682 | * Now can put in the inode number, since i8count is set. | |
683 | */ | |
4740175e | 684 | dp->d_ops->sf_put_parent_ino(sfp, pino); |
ac8ba50f | 685 | sfp->count = 0; |
1da177e4 LT |
686 | dp->i_d.di_size = size; |
687 | xfs_dir2_sf_check(args); | |
688 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
689 | return 0; | |
690 | } | |
691 | ||
1da177e4 LT |
692 | /* |
693 | * Lookup an entry in a shortform directory. | |
694 | * Returns EEXIST if found, ENOENT if not found. | |
695 | */ | |
696 | int /* error */ | |
697 | xfs_dir2_sf_lookup( | |
698 | xfs_da_args_t *args) /* operation arguments */ | |
699 | { | |
700 | xfs_inode_t *dp; /* incore directory inode */ | |
701 | int i; /* entry index */ | |
384f3ced | 702 | int error; |
1da177e4 | 703 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 704 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 705 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 706 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 707 | |
0b1b213f CH |
708 | trace_xfs_dir2_sf_lookup(args); |
709 | ||
1da177e4 LT |
710 | xfs_dir2_sf_check(args); |
711 | dp = args->dp; | |
712 | ||
713 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
714 | /* | |
715 | * Bail out if the directory is way too short. | |
716 | */ | |
717 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
718 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 719 | return -EIO; |
1da177e4 LT |
720 | } |
721 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
722 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
723 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
724 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
725 | /* |
726 | * Special case for . | |
727 | */ | |
728 | if (args->namelen == 1 && args->name[0] == '.') { | |
729 | args->inumber = dp->i_ino; | |
5163f95a | 730 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 731 | args->filetype = XFS_DIR3_FT_DIR; |
2451337d | 732 | return -EEXIST; |
1da177e4 LT |
733 | } |
734 | /* | |
735 | * Special case for .. | |
736 | */ | |
737 | if (args->namelen == 2 && | |
738 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 739 | args->inumber = dp->d_ops->sf_get_parent_ino(sfp); |
5163f95a | 740 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 741 | args->filetype = XFS_DIR3_FT_DIR; |
2451337d | 742 | return -EEXIST; |
1da177e4 LT |
743 | } |
744 | /* | |
745 | * Loop over all the entries trying to match ours. | |
746 | */ | |
384f3ced | 747 | ci_sfep = NULL; |
ac8ba50f | 748 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 749 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
750 | /* |
751 | * Compare name and if it's an exact match, return the inode | |
752 | * number. If it's the first case-insensitive match, store the | |
753 | * inode number and continue looking for an exact match. | |
754 | */ | |
755 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
756 | sfep->namelen); | |
757 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
758 | args->cmpresult = cmp; | |
4740175e DC |
759 | args->inumber = dp->d_ops->sf_get_ino(sfp, sfep); |
760 | args->filetype = dp->d_ops->sf_get_ftype(sfep); | |
5163f95a | 761 | if (cmp == XFS_CMP_EXACT) |
2451337d | 762 | return -EEXIST; |
384f3ced | 763 | ci_sfep = sfep; |
1da177e4 LT |
764 | } |
765 | } | |
6a178100 | 766 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
767 | /* |
768 | * Here, we can only be doing a lookup (not a rename or replace). | |
2451337d | 769 | * If a case-insensitive match was not found, return -ENOENT. |
5163f95a | 770 | */ |
384f3ced | 771 | if (!ci_sfep) |
2451337d | 772 | return -ENOENT; |
384f3ced BN |
773 | /* otherwise process the CI match as required by the caller */ |
774 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
b474c7ae | 775 | return error; |
1da177e4 LT |
776 | } |
777 | ||
778 | /* | |
779 | * Remove an entry from a shortform directory. | |
780 | */ | |
781 | int /* error */ | |
782 | xfs_dir2_sf_removename( | |
783 | xfs_da_args_t *args) | |
784 | { | |
785 | int byteoff; /* offset of removed entry */ | |
786 | xfs_inode_t *dp; /* incore directory inode */ | |
787 | int entsize; /* this entry's size */ | |
788 | int i; /* shortform entry index */ | |
789 | int newsize; /* new inode size */ | |
790 | int oldsize; /* old inode size */ | |
791 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 792 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 793 | |
0b1b213f CH |
794 | trace_xfs_dir2_sf_removename(args); |
795 | ||
1da177e4 LT |
796 | dp = args->dp; |
797 | ||
798 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
799 | oldsize = (int)dp->i_d.di_size; | |
800 | /* | |
801 | * Bail out if the directory is way too short. | |
802 | */ | |
803 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
804 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 805 | return -EIO; |
1da177e4 LT |
806 | } |
807 | ASSERT(dp->i_df.if_bytes == oldsize); | |
808 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
809 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
810 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
811 | /* |
812 | * Loop over the old directory entries. | |
813 | * Find the one we're deleting. | |
814 | */ | |
ac8ba50f | 815 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 816 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
817 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
818 | XFS_CMP_EXACT) { | |
4740175e | 819 | ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) == |
8bc38787 | 820 | args->inumber); |
1da177e4 LT |
821 | break; |
822 | } | |
823 | } | |
824 | /* | |
825 | * Didn't find it. | |
826 | */ | |
ac8ba50f | 827 | if (i == sfp->count) |
2451337d | 828 | return -ENOENT; |
1da177e4 LT |
829 | /* |
830 | * Calculate sizes. | |
831 | */ | |
832 | byteoff = (int)((char *)sfep - (char *)sfp); | |
32c5483a | 833 | entsize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
834 | newsize = oldsize - entsize; |
835 | /* | |
836 | * Copy the part if any after the removed entry, sliding it down. | |
837 | */ | |
838 | if (byteoff + entsize < oldsize) | |
839 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
840 | oldsize - (byteoff + entsize)); | |
841 | /* | |
842 | * Fix up the header and file size. | |
843 | */ | |
ac8ba50f | 844 | sfp->count--; |
1da177e4 LT |
845 | dp->i_d.di_size = newsize; |
846 | /* | |
847 | * Reallocate, making it smaller. | |
848 | */ | |
849 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 850 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
851 | /* |
852 | * Are we changing inode number size? | |
853 | */ | |
854 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 855 | if (sfp->i8count == 1) |
1da177e4 LT |
856 | xfs_dir2_sf_toino4(args); |
857 | else | |
ac8ba50f | 858 | sfp->i8count--; |
1da177e4 | 859 | } |
1da177e4 LT |
860 | xfs_dir2_sf_check(args); |
861 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
862 | return 0; | |
863 | } | |
864 | ||
865 | /* | |
866 | * Replace the inode number of an entry in a shortform directory. | |
867 | */ | |
868 | int /* error */ | |
869 | xfs_dir2_sf_replace( | |
870 | xfs_da_args_t *args) /* operation arguments */ | |
871 | { | |
872 | xfs_inode_t *dp; /* incore directory inode */ | |
873 | int i; /* entry index */ | |
1da177e4 | 874 | xfs_ino_t ino=0; /* entry old inode number */ |
1da177e4 | 875 | int i8elevated; /* sf_toino8 set i8count=1 */ |
1da177e4 | 876 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 877 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 878 | |
0b1b213f CH |
879 | trace_xfs_dir2_sf_replace(args); |
880 | ||
1da177e4 LT |
881 | dp = args->dp; |
882 | ||
883 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
884 | /* | |
885 | * Bail out if the shortform directory is way too small. | |
886 | */ | |
887 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
888 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 889 | return -EIO; |
1da177e4 LT |
890 | } |
891 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
892 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
893 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
894 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
d5cf09ba | 895 | |
1da177e4 LT |
896 | /* |
897 | * New inode number is large, and need to convert to 8-byte inodes. | |
898 | */ | |
ac8ba50f | 899 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
900 | int error; /* error return value */ |
901 | int newsize; /* new inode size */ | |
902 | ||
903 | newsize = | |
904 | dp->i_df.if_bytes + | |
ac8ba50f | 905 | (sfp->count + 1) * |
1da177e4 LT |
906 | ((uint)sizeof(xfs_dir2_ino8_t) - |
907 | (uint)sizeof(xfs_dir2_ino4_t)); | |
908 | /* | |
909 | * Won't fit as shortform, convert to block then do replace. | |
910 | */ | |
911 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
912 | error = xfs_dir2_sf_to_block(args); | |
913 | if (error) { | |
914 | return error; | |
915 | } | |
916 | return xfs_dir2_block_replace(args); | |
917 | } | |
918 | /* | |
919 | * Still fits, convert to 8-byte now. | |
920 | */ | |
921 | xfs_dir2_sf_toino8(args); | |
922 | i8elevated = 1; | |
ac8ba50f | 923 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
924 | } else |
925 | i8elevated = 0; | |
d5cf09ba | 926 | |
1da177e4 LT |
927 | ASSERT(args->namelen != 1 || args->name[0] != '.'); |
928 | /* | |
929 | * Replace ..'s entry. | |
930 | */ | |
931 | if (args->namelen == 2 && | |
932 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 933 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 | 934 | ASSERT(args->inumber != ino); |
4740175e | 935 | dp->d_ops->sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
936 | } |
937 | /* | |
938 | * Normal entry, look for the name. | |
939 | */ | |
940 | else { | |
0cb97766 | 941 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 942 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
943 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
944 | XFS_CMP_EXACT) { | |
4740175e | 945 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 | 946 | ASSERT(args->inumber != ino); |
4740175e DC |
947 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
948 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1da177e4 LT |
949 | break; |
950 | } | |
951 | } | |
952 | /* | |
953 | * Didn't find it. | |
954 | */ | |
ac8ba50f | 955 | if (i == sfp->count) { |
6a178100 | 956 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
957 | if (i8elevated) |
958 | xfs_dir2_sf_toino4(args); | |
2451337d | 959 | return -ENOENT; |
1da177e4 LT |
960 | } |
961 | } | |
1da177e4 LT |
962 | /* |
963 | * See if the old number was large, the new number is small. | |
964 | */ | |
965 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
966 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
967 | /* | |
968 | * And the old count was one, so need to convert to small. | |
969 | */ | |
ac8ba50f | 970 | if (sfp->i8count == 1) |
1da177e4 LT |
971 | xfs_dir2_sf_toino4(args); |
972 | else | |
ac8ba50f | 973 | sfp->i8count--; |
1da177e4 LT |
974 | } |
975 | /* | |
976 | * See if the old number was small, the new number is large. | |
977 | */ | |
978 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
979 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
980 | /* | |
981 | * add to the i8count unless we just converted to 8-byte | |
982 | * inodes (which does an implied i8count = 1) | |
983 | */ | |
ac8ba50f | 984 | ASSERT(sfp->i8count != 0); |
1da177e4 | 985 | if (!i8elevated) |
ac8ba50f | 986 | sfp->i8count++; |
1da177e4 | 987 | } |
1da177e4 LT |
988 | xfs_dir2_sf_check(args); |
989 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
990 | return 0; | |
991 | } | |
992 | ||
1da177e4 LT |
993 | /* |
994 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
995 | * The last 8-byte inode number is gone, but the count is still 1. | |
996 | */ | |
997 | static void | |
998 | xfs_dir2_sf_toino4( | |
999 | xfs_da_args_t *args) /* operation arguments */ | |
1000 | { | |
1001 | char *buf; /* old dir's buffer */ | |
1002 | xfs_inode_t *dp; /* incore directory inode */ | |
1003 | int i; /* entry index */ | |
1da177e4 LT |
1004 | int newsize; /* new inode size */ |
1005 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1006 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1007 | int oldsize; /* old inode size */ |
1008 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1009 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1010 | |
0b1b213f CH |
1011 | trace_xfs_dir2_sf_toino4(args); |
1012 | ||
1da177e4 LT |
1013 | dp = args->dp; |
1014 | ||
1015 | /* | |
1016 | * Copy the old directory to the buffer. | |
1017 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1018 | * Don't want xfs_idata_realloc copying the data here. | |
1019 | */ | |
1020 | oldsize = dp->i_df.if_bytes; | |
1021 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1022 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1023 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1024 | memcpy(buf, oldsfp, oldsize); |
1025 | /* | |
1026 | * Compute the new inode size. | |
1027 | */ | |
1028 | newsize = | |
1029 | oldsize - | |
ac8ba50f | 1030 | (oldsfp->count + 1) * |
1da177e4 LT |
1031 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1032 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1033 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1034 | /* | |
1035 | * Reset our pointers, the data has moved. | |
1036 | */ | |
ac8ba50f CH |
1037 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1038 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1039 | /* |
1040 | * Fill in the new header. | |
1041 | */ | |
ac8ba50f CH |
1042 | sfp->count = oldsfp->count; |
1043 | sfp->i8count = 0; | |
4740175e | 1044 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1045 | /* |
1046 | * Copy the entries field by field. | |
1047 | */ | |
bbaaf538 CH |
1048 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1049 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1050 | i < sfp->count; |
32c5483a DC |
1051 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1052 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1053 | sfep->namelen = oldsfep->namelen; |
1054 | sfep->offset = oldsfep->offset; | |
1055 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1056 | dp->d_ops->sf_put_ino(sfp, sfep, |
1057 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1058 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1059 | } |
1060 | /* | |
1061 | * Clean up the inode. | |
1062 | */ | |
f0e2d93c | 1063 | kmem_free(buf); |
1da177e4 LT |
1064 | dp->i_d.di_size = newsize; |
1065 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1066 | } | |
1067 | ||
1068 | /* | |
5e06d148 ES |
1069 | * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers. |
1070 | * The new entry w/ an 8-byte inode number is not there yet; we leave with | |
1071 | * i8count set to 1, but no corresponding 8-byte entry. | |
1da177e4 LT |
1072 | */ |
1073 | static void | |
1074 | xfs_dir2_sf_toino8( | |
1075 | xfs_da_args_t *args) /* operation arguments */ | |
1076 | { | |
1077 | char *buf; /* old dir's buffer */ | |
1078 | xfs_inode_t *dp; /* incore directory inode */ | |
1079 | int i; /* entry index */ | |
1da177e4 LT |
1080 | int newsize; /* new inode size */ |
1081 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1082 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1083 | int oldsize; /* old inode size */ |
1084 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1085 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1da177e4 | 1086 | |
0b1b213f CH |
1087 | trace_xfs_dir2_sf_toino8(args); |
1088 | ||
1da177e4 LT |
1089 | dp = args->dp; |
1090 | ||
1091 | /* | |
1092 | * Copy the old directory to the buffer. | |
1093 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1094 | * Don't want xfs_idata_realloc copying the data here. | |
1095 | */ | |
1096 | oldsize = dp->i_df.if_bytes; | |
1097 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1098 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1099 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1100 | memcpy(buf, oldsfp, oldsize); |
1101 | /* | |
5e06d148 | 1102 | * Compute the new inode size (nb: entry count + 1 for parent) |
1da177e4 LT |
1103 | */ |
1104 | newsize = | |
1105 | oldsize + | |
ac8ba50f | 1106 | (oldsfp->count + 1) * |
1da177e4 LT |
1107 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1108 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1109 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1110 | /* | |
1111 | * Reset our pointers, the data has moved. | |
1112 | */ | |
ac8ba50f CH |
1113 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1114 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1115 | /* |
1116 | * Fill in the new header. | |
1117 | */ | |
ac8ba50f CH |
1118 | sfp->count = oldsfp->count; |
1119 | sfp->i8count = 1; | |
4740175e | 1120 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1121 | /* |
1122 | * Copy the entries field by field. | |
1123 | */ | |
bbaaf538 CH |
1124 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1125 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1126 | i < sfp->count; |
32c5483a DC |
1127 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1128 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1129 | sfep->namelen = oldsfep->namelen; |
1130 | sfep->offset = oldsfep->offset; | |
1131 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1132 | dp->d_ops->sf_put_ino(sfp, sfep, |
1133 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1134 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1135 | } |
1136 | /* | |
1137 | * Clean up the inode. | |
1138 | */ | |
f0e2d93c | 1139 | kmem_free(buf); |
1da177e4 LT |
1140 | dp->i_d.di_size = newsize; |
1141 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1142 | } |