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_sb.h" |
1da177e4 | 24 | #include "xfs_mount.h" |
57062787 | 25 | #include "xfs_da_format.h" |
a844f451 | 26 | #include "xfs_da_btree.h" |
1da177e4 | 27 | #include "xfs_inode.h" |
239880ef | 28 | #include "xfs_trans.h" |
a844f451 | 29 | #include "xfs_inode_item.h" |
1da177e4 | 30 | #include "xfs_error.h" |
2b9ab5ab | 31 | #include "xfs_dir2.h" |
57926640 | 32 | #include "xfs_dir2_priv.h" |
0b1b213f | 33 | #include "xfs_trace.h" |
1da177e4 LT |
34 | |
35 | /* | |
36 | * Prototypes for internal functions. | |
37 | */ | |
38 | static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, | |
39 | xfs_dir2_sf_entry_t *sfep, | |
40 | xfs_dir2_data_aoff_t offset, | |
41 | int new_isize); | |
42 | static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, | |
43 | int new_isize); | |
44 | static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, | |
45 | xfs_dir2_sf_entry_t **sfepp, | |
46 | xfs_dir2_data_aoff_t *offsetp); | |
47 | #ifdef DEBUG | |
48 | static void xfs_dir2_sf_check(xfs_da_args_t *args); | |
49 | #else | |
50 | #define xfs_dir2_sf_check(args) | |
51 | #endif /* DEBUG */ | |
d5cf09ba | 52 | |
1da177e4 LT |
53 | static void xfs_dir2_sf_toino4(xfs_da_args_t *args); |
54 | static void xfs_dir2_sf_toino8(xfs_da_args_t *args); | |
1da177e4 LT |
55 | |
56 | /* | |
57 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
58 | * directory and a header for the sf directory, if it will fit it the | |
59 | * space currently present in the inode. If it won't fit, the output | |
60 | * size is too big (but not accurate). | |
61 | */ | |
62 | int /* size for sf form */ | |
63 | xfs_dir2_block_sfsize( | |
64 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 65 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
66 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
67 | { | |
68 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
69 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
70 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
71 | int count; /* shortform entry count */ | |
72 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
73 | int i; /* block entry index */ | |
74 | int i8count; /* count of big-inode entries */ | |
75 | int isdot; /* entry is "." */ | |
76 | int isdotdot; /* entry is ".." */ | |
77 | xfs_mount_t *mp; /* mount structure pointer */ | |
78 | int namelen; /* total name bytes */ | |
5bde1ba9 | 79 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 | 80 | int size=0; /* total computed size */ |
0cb97766 | 81 | int has_ftype; |
8f66193c | 82 | struct xfs_da_geometry *geo; |
1da177e4 LT |
83 | |
84 | mp = dp->i_mount; | |
8f66193c | 85 | geo = mp->m_dir_geo; |
1da177e4 | 86 | |
0cb97766 DC |
87 | /* |
88 | * if there is a filetype field, add the extra byte to the namelen | |
89 | * for each entry that we see. | |
90 | */ | |
91 | has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0; | |
92 | ||
1da177e4 | 93 | count = i8count = namelen = 0; |
8f66193c | 94 | btp = xfs_dir2_block_tail_p(geo, hdr); |
bbaaf538 | 95 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
96 | |
97 | /* | |
98 | * Iterate over the block's data entries by using the leaf pointers. | |
99 | */ | |
e922fffa | 100 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 101 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
102 | continue; |
103 | /* | |
104 | * Calculate the pointer to the entry at hand. | |
105 | */ | |
30028030 | 106 | dep = (xfs_dir2_data_entry_t *)((char *)hdr + |
8f66193c | 107 | xfs_dir2_dataptr_to_off(geo, addr)); |
1da177e4 LT |
108 | /* |
109 | * Detect . and .., so we can special-case them. | |
110 | * . is not included in sf directories. | |
111 | * .. is included by just the parent inode number. | |
112 | */ | |
113 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
114 | isdotdot = | |
115 | dep->namelen == 2 && | |
116 | dep->name[0] == '.' && dep->name[1] == '.'; | |
d5cf09ba | 117 | |
1da177e4 | 118 | if (!isdot) |
ff9901c1 | 119 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
d5cf09ba | 120 | |
0cb97766 | 121 | /* take into account the file type field */ |
1da177e4 LT |
122 | if (!isdot && !isdotdot) { |
123 | count++; | |
0cb97766 | 124 | namelen += dep->namelen + has_ftype; |
1da177e4 | 125 | } else if (isdotdot) |
ff9901c1 | 126 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
127 | /* |
128 | * Calculate the new size, see if we should give up yet. | |
129 | */ | |
bbaaf538 | 130 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
131 | count + /* namelen */ |
132 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
133 | namelen + /* name */ | |
134 | (i8count ? /* inumber */ | |
135 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
136 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
137 | if (size > XFS_IFORK_DSIZE(dp)) | |
138 | return size; /* size value is a failure */ | |
139 | } | |
140 | /* | |
141 | * Create the output header, if it worked. | |
142 | */ | |
143 | sfhp->count = count; | |
144 | sfhp->i8count = i8count; | |
4740175e | 145 | dp->d_ops->sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
146 | return size; |
147 | } | |
148 | ||
149 | /* | |
150 | * Convert a block format directory to shortform. | |
151 | * Caller has already checked that it will fit, and built us a header. | |
152 | */ | |
153 | int /* error */ | |
154 | xfs_dir2_block_to_sf( | |
155 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 | 156 | struct xfs_buf *bp, |
1da177e4 LT |
157 | int size, /* shortform directory size */ |
158 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
159 | { | |
a64b0417 | 160 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
161 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
162 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
163 | xfs_inode_t *dp; /* incore directory inode */ | |
164 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
165 | char *endptr; /* end of data entries */ | |
166 | int error; /* error return value */ | |
167 | int logflags; /* inode logging flags */ | |
168 | xfs_mount_t *mp; /* filesystem mount point */ | |
169 | char *ptr; /* current data pointer */ | |
170 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 171 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
b3f03bac | 172 | xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */ |
1da177e4 | 173 | |
0b1b213f CH |
174 | trace_xfs_dir2_block_to_sf(args); |
175 | ||
1da177e4 LT |
176 | dp = args->dp; |
177 | mp = dp->i_mount; | |
178 | ||
179 | /* | |
b3f03bac DC |
180 | * allocate a temporary destination buffer the size of the inode |
181 | * to format the data into. Once we have formatted the data, we | |
182 | * can free the block and copy the formatted data into the inode literal | |
183 | * area. | |
1da177e4 | 184 | */ |
b3f03bac DC |
185 | dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP); |
186 | hdr = bp->b_addr; | |
4f6ae1a4 | 187 | |
1da177e4 LT |
188 | /* |
189 | * Copy the header into the newly allocate local space. | |
190 | */ | |
b3f03bac | 191 | sfp = (xfs_dir2_sf_hdr_t *)dst; |
bbaaf538 | 192 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
b3f03bac | 193 | |
1da177e4 LT |
194 | /* |
195 | * Set up to loop over the block's entries. | |
196 | */ | |
8f66193c | 197 | btp = xfs_dir2_block_tail_p(args->geo, hdr); |
2ca98774 | 198 | ptr = (char *)dp->d_ops->data_entry_p(hdr); |
bbaaf538 CH |
199 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
200 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
201 | /* |
202 | * Loop over the active and unused entries. | |
203 | * Stop when we reach the leaf/tail portion of the block. | |
204 | */ | |
205 | while (ptr < endptr) { | |
206 | /* | |
207 | * If it's unused, just skip over it. | |
208 | */ | |
209 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
210 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
211 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
212 | continue; |
213 | } | |
214 | dep = (xfs_dir2_data_entry_t *)ptr; | |
215 | /* | |
216 | * Skip . | |
217 | */ | |
218 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 219 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
220 | /* |
221 | * Skip .., but make sure the inode number is right. | |
222 | */ | |
223 | else if (dep->namelen == 2 && | |
224 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 225 | ASSERT(be64_to_cpu(dep->inumber) == |
4740175e | 226 | dp->d_ops->sf_get_parent_ino(sfp)); |
1da177e4 LT |
227 | /* |
228 | * Normal entry, copy it into shortform. | |
229 | */ | |
230 | else { | |
231 | sfep->namelen = dep->namelen; | |
bbaaf538 | 232 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 233 | (xfs_dir2_data_aoff_t) |
a64b0417 | 234 | ((char *)dep - (char *)hdr)); |
1da177e4 | 235 | memcpy(sfep->name, dep->name, dep->namelen); |
4740175e DC |
236 | dp->d_ops->sf_put_ino(sfp, sfep, |
237 | be64_to_cpu(dep->inumber)); | |
238 | dp->d_ops->sf_put_ftype(sfep, | |
9d23fc85 | 239 | dp->d_ops->data_get_ftype(dep)); |
8bc38787 | 240 | |
32c5483a | 241 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 | 242 | } |
9d23fc85 | 243 | ptr += dp->d_ops->data_entsize(dep->namelen); |
1da177e4 LT |
244 | } |
245 | ASSERT((char *)sfep - (char *)sfp == size); | |
b3f03bac DC |
246 | |
247 | /* now we are done with the block, we can shrink the inode */ | |
248 | logflags = XFS_ILOG_CORE; | |
7dda6e86 | 249 | error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp); |
b3f03bac | 250 | if (error) { |
2451337d | 251 | ASSERT(error != -ENOSPC); |
b3f03bac DC |
252 | goto out; |
253 | } | |
254 | ||
255 | /* | |
256 | * The buffer is now unconditionally gone, whether | |
257 | * xfs_dir2_shrink_inode worked or not. | |
258 | * | |
259 | * Convert the inode to local format and copy the data in. | |
260 | */ | |
261 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
262 | dp->i_df.if_flags |= XFS_IFINLINE; | |
263 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
264 | ASSERT(dp->i_df.if_bytes == 0); | |
265 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
266 | ||
267 | logflags |= XFS_ILOG_DDATA; | |
268 | memcpy(dp->i_df.if_u1.if_data, dst, size); | |
269 | dp->i_d.di_size = size; | |
1da177e4 LT |
270 | xfs_dir2_sf_check(args); |
271 | out: | |
272 | xfs_trans_log_inode(args->trans, dp, logflags); | |
b3f03bac | 273 | kmem_free(dst); |
1da177e4 LT |
274 | return error; |
275 | } | |
276 | ||
277 | /* | |
278 | * Add a name to a shortform directory. | |
279 | * There are two algorithms, "easy" and "hard" which we decide on | |
280 | * before changing anything. | |
281 | * Convert to block form if necessary, if the new entry won't fit. | |
282 | */ | |
283 | int /* error */ | |
284 | xfs_dir2_sf_addname( | |
285 | xfs_da_args_t *args) /* operation arguments */ | |
286 | { | |
1da177e4 LT |
287 | xfs_inode_t *dp; /* incore directory inode */ |
288 | int error; /* error return value */ | |
289 | int incr_isize; /* total change in size */ | |
290 | int new_isize; /* di_size after adding name */ | |
291 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 292 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 | 293 | int pick; /* which algorithm to use */ |
ac8ba50f | 294 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 295 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 296 | |
0b1b213f CH |
297 | trace_xfs_dir2_sf_addname(args); |
298 | ||
2451337d | 299 | ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT); |
1da177e4 LT |
300 | dp = args->dp; |
301 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
302 | /* | |
303 | * Make sure the shortform value has some of its header. | |
304 | */ | |
305 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
306 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 307 | return -EIO; |
1da177e4 LT |
308 | } |
309 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
310 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
311 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
312 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
313 | /* |
314 | * Compute entry (and change in) size. | |
315 | */ | |
5e06d148 | 316 | incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 | 317 | objchange = 0; |
d5cf09ba | 318 | |
1da177e4 LT |
319 | /* |
320 | * Do we have to change to 8 byte inodes? | |
321 | */ | |
ac8ba50f | 322 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 | 323 | /* |
5e06d148 | 324 | * Yes, adjust the inode size. old count + (parent + new) |
1da177e4 | 325 | */ |
1da177e4 | 326 | incr_isize += |
ac8ba50f | 327 | (sfp->count + 2) * |
1da177e4 LT |
328 | ((uint)sizeof(xfs_dir2_ino8_t) - |
329 | (uint)sizeof(xfs_dir2_ino4_t)); | |
330 | objchange = 1; | |
331 | } | |
d5cf09ba | 332 | |
5e06d148 | 333 | new_isize = (int)dp->i_d.di_size + incr_isize; |
1da177e4 LT |
334 | /* |
335 | * Won't fit as shortform any more (due to size), | |
336 | * or the pick routine says it won't (due to offset values). | |
337 | */ | |
338 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
339 | (pick = | |
340 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
341 | /* | |
342 | * Just checking or no space reservation, it doesn't fit. | |
343 | */ | |
6a178100 | 344 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
2451337d | 345 | return -ENOSPC; |
1da177e4 LT |
346 | /* |
347 | * Convert to block form then add the name. | |
348 | */ | |
349 | error = xfs_dir2_sf_to_block(args); | |
350 | if (error) | |
351 | return error; | |
352 | return xfs_dir2_block_addname(args); | |
353 | } | |
354 | /* | |
355 | * Just checking, it fits. | |
356 | */ | |
6a178100 | 357 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
358 | return 0; |
359 | /* | |
360 | * Do it the easy way - just add it at the end. | |
361 | */ | |
362 | if (pick == 1) | |
363 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
364 | /* | |
365 | * Do it the hard way - look for a place to insert the new entry. | |
366 | * Convert to 8 byte inode numbers first if necessary. | |
367 | */ | |
368 | else { | |
369 | ASSERT(pick == 2); | |
1da177e4 LT |
370 | if (objchange) |
371 | xfs_dir2_sf_toino8(args); | |
1da177e4 LT |
372 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); |
373 | } | |
374 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | /* | |
379 | * Add the new entry the "easy" way. | |
380 | * This is copying the old directory and adding the new entry at the end. | |
381 | * Since it's sorted by "offset" we need room after the last offset | |
382 | * that's already there, and then room to convert to a block directory. | |
383 | * This is already checked by the pick routine. | |
384 | */ | |
385 | static void | |
386 | xfs_dir2_sf_addname_easy( | |
387 | xfs_da_args_t *args, /* operation arguments */ | |
388 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
389 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
390 | int new_isize) /* new directory size */ | |
391 | { | |
392 | int byteoff; /* byte offset in sf dir */ | |
393 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 394 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
395 | |
396 | dp = args->dp; | |
397 | ||
ac8ba50f | 398 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
399 | byteoff = (int)((char *)sfep - (char *)sfp); |
400 | /* | |
401 | * Grow the in-inode space. | |
402 | */ | |
32c5483a | 403 | xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen), |
0cb97766 | 404 | XFS_DATA_FORK); |
1da177e4 LT |
405 | /* |
406 | * Need to set up again due to realloc of the inode data. | |
407 | */ | |
ac8ba50f | 408 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
409 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
410 | /* | |
411 | * Fill in the new entry. | |
412 | */ | |
413 | sfep->namelen = args->namelen; | |
bbaaf538 | 414 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 415 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
416 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
417 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1c55cece | 418 | |
1da177e4 LT |
419 | /* |
420 | * Update the header and inode. | |
421 | */ | |
ac8ba50f | 422 | sfp->count++; |
1da177e4 | 423 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) |
ac8ba50f | 424 | sfp->i8count++; |
1da177e4 LT |
425 | dp->i_d.di_size = new_isize; |
426 | xfs_dir2_sf_check(args); | |
427 | } | |
428 | ||
429 | /* | |
430 | * Add the new entry the "hard" way. | |
431 | * The caller has already converted to 8 byte inode numbers if necessary, | |
432 | * in which case we need to leave the i8count at 1. | |
433 | * Find a hole that the new entry will fit into, and copy | |
434 | * the first part of the entries, the new entry, and the last part of | |
435 | * the entries. | |
436 | */ | |
437 | /* ARGSUSED */ | |
438 | static void | |
439 | xfs_dir2_sf_addname_hard( | |
440 | xfs_da_args_t *args, /* operation arguments */ | |
441 | int objchange, /* changing inode number size */ | |
442 | int new_isize) /* new directory size */ | |
443 | { | |
444 | int add_datasize; /* data size need for new ent */ | |
445 | char *buf; /* buffer for old */ | |
446 | xfs_inode_t *dp; /* incore directory inode */ | |
447 | int eof; /* reached end of old dir */ | |
448 | int nbytes; /* temp for byte copies */ | |
449 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
450 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
451 | int old_isize; /* previous di_size */ | |
452 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 453 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 454 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 455 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
0cb97766 | 456 | struct xfs_mount *mp; |
1da177e4 LT |
457 | |
458 | /* | |
459 | * Copy the old directory to the stack buffer. | |
460 | */ | |
461 | dp = args->dp; | |
0cb97766 | 462 | mp = dp->i_mount; |
1da177e4 | 463 | |
ac8ba50f | 464 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
465 | old_isize = (int)dp->i_d.di_size; |
466 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 467 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
468 | memcpy(oldsfp, sfp, old_isize); |
469 | /* | |
470 | * Loop over the old directory finding the place we're going | |
471 | * to insert the new entry. | |
472 | * If it's going to end up at the end then oldsfep will point there. | |
473 | */ | |
1c9a5b2e | 474 | for (offset = dp->d_ops->data_first_offset, |
bbaaf538 | 475 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
9d23fc85 | 476 | add_datasize = dp->d_ops->data_entsize(args->namelen), |
1da177e4 LT |
477 | eof = (char *)oldsfep == &buf[old_isize]; |
478 | !eof; | |
9d23fc85 | 479 | offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen), |
32c5483a | 480 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep), |
1da177e4 | 481 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 482 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
483 | if (offset + add_datasize <= new_offset) |
484 | break; | |
485 | } | |
486 | /* | |
487 | * Get rid of the old directory, then allocate space for | |
488 | * the new one. We do this so xfs_idata_realloc won't copy | |
489 | * the data. | |
490 | */ | |
491 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
492 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
493 | /* | |
494 | * Reset the pointer since the buffer was reallocated. | |
495 | */ | |
ac8ba50f | 496 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
497 | /* |
498 | * Copy the first part of the directory, including the header. | |
499 | */ | |
500 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
501 | memcpy(sfp, oldsfp, nbytes); | |
502 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
503 | /* | |
504 | * Fill in the new entry, and update the header counts. | |
505 | */ | |
506 | sfep->namelen = args->namelen; | |
bbaaf538 | 507 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 508 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
509 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
510 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
ac8ba50f | 511 | sfp->count++; |
1da177e4 | 512 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) |
ac8ba50f | 513 | sfp->i8count++; |
1da177e4 LT |
514 | /* |
515 | * If there's more left to copy, do that. | |
516 | */ | |
517 | if (!eof) { | |
32c5483a | 518 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
519 | memcpy(sfep, oldsfep, old_isize - nbytes); |
520 | } | |
f0e2d93c | 521 | kmem_free(buf); |
1da177e4 LT |
522 | dp->i_d.di_size = new_isize; |
523 | xfs_dir2_sf_check(args); | |
524 | } | |
525 | ||
526 | /* | |
527 | * Decide if the new entry will fit at all. | |
528 | * If it will fit, pick between adding the new entry to the end (easy) | |
529 | * or somewhere else (hard). | |
530 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
531 | */ | |
532 | /*ARGSUSED*/ | |
533 | static int /* pick result */ | |
534 | xfs_dir2_sf_addname_pick( | |
535 | xfs_da_args_t *args, /* operation arguments */ | |
536 | int objchange, /* inode # size changes */ | |
537 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
538 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
539 | { | |
540 | xfs_inode_t *dp; /* incore directory inode */ | |
541 | int holefit; /* found hole it will fit in */ | |
542 | int i; /* entry number */ | |
543 | xfs_mount_t *mp; /* filesystem mount point */ | |
544 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
545 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 546 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
547 | int size; /* entry's data size */ |
548 | int used; /* data bytes used */ | |
549 | ||
550 | dp = args->dp; | |
551 | mp = dp->i_mount; | |
552 | ||
ac8ba50f | 553 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
9d23fc85 | 554 | size = dp->d_ops->data_entsize(args->namelen); |
1c9a5b2e | 555 | offset = dp->d_ops->data_first_offset; |
bbaaf538 | 556 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
557 | holefit = 0; |
558 | /* | |
559 | * Loop over sf entries. | |
560 | * Keep track of data offset and whether we've seen a place | |
561 | * to insert the new entry. | |
562 | */ | |
ac8ba50f | 563 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 564 | if (!holefit) |
bbaaf538 CH |
565 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
566 | offset = xfs_dir2_sf_get_offset(sfep) + | |
9d23fc85 | 567 | dp->d_ops->data_entsize(sfep->namelen); |
32c5483a | 568 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
569 | } |
570 | /* | |
571 | * Calculate data bytes used excluding the new entry, if this | |
572 | * was a data block (block form directory). | |
573 | */ | |
574 | used = offset + | |
ac8ba50f | 575 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
576 | (uint)sizeof(xfs_dir2_block_tail_t); |
577 | /* | |
578 | * If it won't fit in a block form then we can't insert it, | |
579 | * we'll go back, convert to block, then try the insert and convert | |
580 | * to leaf. | |
581 | */ | |
8f66193c | 582 | if (used + (holefit ? 0 : size) > args->geo->blksize) |
1da177e4 LT |
583 | return 0; |
584 | /* | |
585 | * If changing the inode number size, do it the hard way. | |
586 | */ | |
d5cf09ba | 587 | if (objchange) |
1da177e4 | 588 | return 2; |
1da177e4 LT |
589 | /* |
590 | * If it won't fit at the end then do it the hard way (use the hole). | |
591 | */ | |
8f66193c | 592 | if (used + size > args->geo->blksize) |
1da177e4 LT |
593 | return 2; |
594 | /* | |
595 | * Do it the easy way. | |
596 | */ | |
597 | *sfepp = sfep; | |
598 | *offsetp = offset; | |
599 | return 1; | |
600 | } | |
601 | ||
602 | #ifdef DEBUG | |
603 | /* | |
604 | * Check consistency of shortform directory, assert if bad. | |
605 | */ | |
606 | static void | |
607 | xfs_dir2_sf_check( | |
608 | xfs_da_args_t *args) /* operation arguments */ | |
609 | { | |
610 | xfs_inode_t *dp; /* incore directory inode */ | |
611 | int i; /* entry number */ | |
612 | int i8count; /* number of big inode#s */ | |
613 | xfs_ino_t ino; /* entry inode number */ | |
614 | int offset; /* data offset */ | |
615 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 616 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
0cb97766 | 617 | struct xfs_mount *mp; |
1da177e4 LT |
618 | |
619 | dp = args->dp; | |
0cb97766 | 620 | mp = dp->i_mount; |
1da177e4 | 621 | |
ac8ba50f | 622 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1c9a5b2e | 623 | offset = dp->d_ops->data_first_offset; |
4740175e | 624 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
625 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
626 | ||
bbaaf538 | 627 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 628 | i < sfp->count; |
32c5483a | 629 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
bbaaf538 | 630 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
4740175e | 631 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
632 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
633 | offset = | |
bbaaf538 | 634 | xfs_dir2_sf_get_offset(sfep) + |
9d23fc85 | 635 | dp->d_ops->data_entsize(sfep->namelen); |
4740175e | 636 | ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX); |
1da177e4 | 637 | } |
ac8ba50f | 638 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
639 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); |
640 | ASSERT(offset + | |
ac8ba50f | 641 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
8f66193c | 642 | (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize); |
1da177e4 LT |
643 | } |
644 | #endif /* DEBUG */ | |
645 | ||
646 | /* | |
647 | * Create a new (shortform) directory. | |
648 | */ | |
649 | int /* error, always 0 */ | |
650 | xfs_dir2_sf_create( | |
651 | xfs_da_args_t *args, /* operation arguments */ | |
652 | xfs_ino_t pino) /* parent inode number */ | |
653 | { | |
654 | xfs_inode_t *dp; /* incore directory inode */ | |
655 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 656 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
657 | int size; /* directory size */ |
658 | ||
0b1b213f CH |
659 | trace_xfs_dir2_sf_create(args); |
660 | ||
1da177e4 LT |
661 | dp = args->dp; |
662 | ||
663 | ASSERT(dp != NULL); | |
664 | ASSERT(dp->i_d.di_size == 0); | |
665 | /* | |
666 | * If it's currently a zero-length extent file, | |
667 | * convert it to local format. | |
668 | */ | |
669 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
670 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
671 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
672 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
673 | dp->i_df.if_flags |= XFS_IFINLINE; | |
674 | } | |
675 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
676 | ASSERT(dp->i_df.if_bytes == 0); | |
677 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 678 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
679 | /* |
680 | * Make a buffer for the data. | |
681 | */ | |
682 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
683 | /* | |
684 | * Fill in the header, | |
685 | */ | |
ac8ba50f CH |
686 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
687 | sfp->i8count = i8count; | |
1da177e4 LT |
688 | /* |
689 | * Now can put in the inode number, since i8count is set. | |
690 | */ | |
4740175e | 691 | dp->d_ops->sf_put_parent_ino(sfp, pino); |
ac8ba50f | 692 | sfp->count = 0; |
1da177e4 LT |
693 | dp->i_d.di_size = size; |
694 | xfs_dir2_sf_check(args); | |
695 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
696 | return 0; | |
697 | } | |
698 | ||
1da177e4 LT |
699 | /* |
700 | * Lookup an entry in a shortform directory. | |
701 | * Returns EEXIST if found, ENOENT if not found. | |
702 | */ | |
703 | int /* error */ | |
704 | xfs_dir2_sf_lookup( | |
705 | xfs_da_args_t *args) /* operation arguments */ | |
706 | { | |
707 | xfs_inode_t *dp; /* incore directory inode */ | |
708 | int i; /* entry index */ | |
384f3ced | 709 | int error; |
1da177e4 | 710 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 711 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 712 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 713 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 714 | |
0b1b213f CH |
715 | trace_xfs_dir2_sf_lookup(args); |
716 | ||
1da177e4 LT |
717 | xfs_dir2_sf_check(args); |
718 | dp = args->dp; | |
719 | ||
720 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
721 | /* | |
722 | * Bail out if the directory is way too short. | |
723 | */ | |
724 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
725 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 726 | return -EIO; |
1da177e4 LT |
727 | } |
728 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
729 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
730 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
731 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
732 | /* |
733 | * Special case for . | |
734 | */ | |
735 | if (args->namelen == 1 && args->name[0] == '.') { | |
736 | args->inumber = dp->i_ino; | |
5163f95a | 737 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 738 | args->filetype = XFS_DIR3_FT_DIR; |
2451337d | 739 | return -EEXIST; |
1da177e4 LT |
740 | } |
741 | /* | |
742 | * Special case for .. | |
743 | */ | |
744 | if (args->namelen == 2 && | |
745 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 746 | args->inumber = dp->d_ops->sf_get_parent_ino(sfp); |
5163f95a | 747 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 748 | args->filetype = XFS_DIR3_FT_DIR; |
2451337d | 749 | return -EEXIST; |
1da177e4 LT |
750 | } |
751 | /* | |
752 | * Loop over all the entries trying to match ours. | |
753 | */ | |
384f3ced | 754 | ci_sfep = NULL; |
ac8ba50f | 755 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 756 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
757 | /* |
758 | * Compare name and if it's an exact match, return the inode | |
759 | * number. If it's the first case-insensitive match, store the | |
760 | * inode number and continue looking for an exact match. | |
761 | */ | |
762 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
763 | sfep->namelen); | |
764 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
765 | args->cmpresult = cmp; | |
4740175e DC |
766 | args->inumber = dp->d_ops->sf_get_ino(sfp, sfep); |
767 | args->filetype = dp->d_ops->sf_get_ftype(sfep); | |
5163f95a | 768 | if (cmp == XFS_CMP_EXACT) |
2451337d | 769 | return -EEXIST; |
384f3ced | 770 | ci_sfep = sfep; |
1da177e4 LT |
771 | } |
772 | } | |
6a178100 | 773 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
774 | /* |
775 | * Here, we can only be doing a lookup (not a rename or replace). | |
2451337d | 776 | * If a case-insensitive match was not found, return -ENOENT. |
5163f95a | 777 | */ |
384f3ced | 778 | if (!ci_sfep) |
2451337d | 779 | return -ENOENT; |
384f3ced BN |
780 | /* otherwise process the CI match as required by the caller */ |
781 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
b474c7ae | 782 | return error; |
1da177e4 LT |
783 | } |
784 | ||
785 | /* | |
786 | * Remove an entry from a shortform directory. | |
787 | */ | |
788 | int /* error */ | |
789 | xfs_dir2_sf_removename( | |
790 | xfs_da_args_t *args) | |
791 | { | |
792 | int byteoff; /* offset of removed entry */ | |
793 | xfs_inode_t *dp; /* incore directory inode */ | |
794 | int entsize; /* this entry's size */ | |
795 | int i; /* shortform entry index */ | |
796 | int newsize; /* new inode size */ | |
797 | int oldsize; /* old inode size */ | |
798 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 799 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 800 | |
0b1b213f CH |
801 | trace_xfs_dir2_sf_removename(args); |
802 | ||
1da177e4 LT |
803 | dp = args->dp; |
804 | ||
805 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
806 | oldsize = (int)dp->i_d.di_size; | |
807 | /* | |
808 | * Bail out if the directory is way too short. | |
809 | */ | |
810 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
811 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 812 | return -EIO; |
1da177e4 LT |
813 | } |
814 | ASSERT(dp->i_df.if_bytes == oldsize); | |
815 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
816 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
817 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
818 | /* |
819 | * Loop over the old directory entries. | |
820 | * Find the one we're deleting. | |
821 | */ | |
ac8ba50f | 822 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 823 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
824 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
825 | XFS_CMP_EXACT) { | |
4740175e | 826 | ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) == |
8bc38787 | 827 | args->inumber); |
1da177e4 LT |
828 | break; |
829 | } | |
830 | } | |
831 | /* | |
832 | * Didn't find it. | |
833 | */ | |
ac8ba50f | 834 | if (i == sfp->count) |
2451337d | 835 | return -ENOENT; |
1da177e4 LT |
836 | /* |
837 | * Calculate sizes. | |
838 | */ | |
839 | byteoff = (int)((char *)sfep - (char *)sfp); | |
32c5483a | 840 | entsize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
841 | newsize = oldsize - entsize; |
842 | /* | |
843 | * Copy the part if any after the removed entry, sliding it down. | |
844 | */ | |
845 | if (byteoff + entsize < oldsize) | |
846 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
847 | oldsize - (byteoff + entsize)); | |
848 | /* | |
849 | * Fix up the header and file size. | |
850 | */ | |
ac8ba50f | 851 | sfp->count--; |
1da177e4 LT |
852 | dp->i_d.di_size = newsize; |
853 | /* | |
854 | * Reallocate, making it smaller. | |
855 | */ | |
856 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 857 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
858 | /* |
859 | * Are we changing inode number size? | |
860 | */ | |
861 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 862 | if (sfp->i8count == 1) |
1da177e4 LT |
863 | xfs_dir2_sf_toino4(args); |
864 | else | |
ac8ba50f | 865 | sfp->i8count--; |
1da177e4 | 866 | } |
1da177e4 LT |
867 | xfs_dir2_sf_check(args); |
868 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
869 | return 0; | |
870 | } | |
871 | ||
872 | /* | |
873 | * Replace the inode number of an entry in a shortform directory. | |
874 | */ | |
875 | int /* error */ | |
876 | xfs_dir2_sf_replace( | |
877 | xfs_da_args_t *args) /* operation arguments */ | |
878 | { | |
879 | xfs_inode_t *dp; /* incore directory inode */ | |
880 | int i; /* entry index */ | |
1da177e4 | 881 | xfs_ino_t ino=0; /* entry old inode number */ |
1da177e4 | 882 | int i8elevated; /* sf_toino8 set i8count=1 */ |
1da177e4 | 883 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 884 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 885 | |
0b1b213f CH |
886 | trace_xfs_dir2_sf_replace(args); |
887 | ||
1da177e4 LT |
888 | dp = args->dp; |
889 | ||
890 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
891 | /* | |
892 | * Bail out if the shortform directory is way too small. | |
893 | */ | |
894 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
895 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
2451337d | 896 | return -EIO; |
1da177e4 LT |
897 | } |
898 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
899 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
900 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
901 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
d5cf09ba | 902 | |
1da177e4 LT |
903 | /* |
904 | * New inode number is large, and need to convert to 8-byte inodes. | |
905 | */ | |
ac8ba50f | 906 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
907 | int error; /* error return value */ |
908 | int newsize; /* new inode size */ | |
909 | ||
910 | newsize = | |
911 | dp->i_df.if_bytes + | |
ac8ba50f | 912 | (sfp->count + 1) * |
1da177e4 LT |
913 | ((uint)sizeof(xfs_dir2_ino8_t) - |
914 | (uint)sizeof(xfs_dir2_ino4_t)); | |
915 | /* | |
916 | * Won't fit as shortform, convert to block then do replace. | |
917 | */ | |
918 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
919 | error = xfs_dir2_sf_to_block(args); | |
920 | if (error) { | |
921 | return error; | |
922 | } | |
923 | return xfs_dir2_block_replace(args); | |
924 | } | |
925 | /* | |
926 | * Still fits, convert to 8-byte now. | |
927 | */ | |
928 | xfs_dir2_sf_toino8(args); | |
929 | i8elevated = 1; | |
ac8ba50f | 930 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
931 | } else |
932 | i8elevated = 0; | |
d5cf09ba | 933 | |
1da177e4 LT |
934 | ASSERT(args->namelen != 1 || args->name[0] != '.'); |
935 | /* | |
936 | * Replace ..'s entry. | |
937 | */ | |
938 | if (args->namelen == 2 && | |
939 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 940 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 | 941 | ASSERT(args->inumber != ino); |
4740175e | 942 | dp->d_ops->sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
943 | } |
944 | /* | |
945 | * Normal entry, look for the name. | |
946 | */ | |
947 | else { | |
0cb97766 | 948 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 949 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
950 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
951 | XFS_CMP_EXACT) { | |
4740175e | 952 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 | 953 | ASSERT(args->inumber != ino); |
4740175e DC |
954 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
955 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1da177e4 LT |
956 | break; |
957 | } | |
958 | } | |
959 | /* | |
960 | * Didn't find it. | |
961 | */ | |
ac8ba50f | 962 | if (i == sfp->count) { |
6a178100 | 963 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
964 | if (i8elevated) |
965 | xfs_dir2_sf_toino4(args); | |
2451337d | 966 | return -ENOENT; |
1da177e4 LT |
967 | } |
968 | } | |
1da177e4 LT |
969 | /* |
970 | * See if the old number was large, the new number is small. | |
971 | */ | |
972 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
973 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
974 | /* | |
975 | * And the old count was one, so need to convert to small. | |
976 | */ | |
ac8ba50f | 977 | if (sfp->i8count == 1) |
1da177e4 LT |
978 | xfs_dir2_sf_toino4(args); |
979 | else | |
ac8ba50f | 980 | sfp->i8count--; |
1da177e4 LT |
981 | } |
982 | /* | |
983 | * See if the old number was small, the new number is large. | |
984 | */ | |
985 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
986 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
987 | /* | |
988 | * add to the i8count unless we just converted to 8-byte | |
989 | * inodes (which does an implied i8count = 1) | |
990 | */ | |
ac8ba50f | 991 | ASSERT(sfp->i8count != 0); |
1da177e4 | 992 | if (!i8elevated) |
ac8ba50f | 993 | sfp->i8count++; |
1da177e4 | 994 | } |
1da177e4 LT |
995 | xfs_dir2_sf_check(args); |
996 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
997 | return 0; | |
998 | } | |
999 | ||
1da177e4 LT |
1000 | /* |
1001 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1002 | * The last 8-byte inode number is gone, but the count is still 1. | |
1003 | */ | |
1004 | static void | |
1005 | xfs_dir2_sf_toino4( | |
1006 | xfs_da_args_t *args) /* operation arguments */ | |
1007 | { | |
1008 | char *buf; /* old dir's buffer */ | |
1009 | xfs_inode_t *dp; /* incore directory inode */ | |
1010 | int i; /* entry index */ | |
1da177e4 LT |
1011 | int newsize; /* new inode size */ |
1012 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1013 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1014 | int oldsize; /* old inode size */ |
1015 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1016 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1017 | struct xfs_mount *mp; |
1da177e4 | 1018 | |
0b1b213f CH |
1019 | trace_xfs_dir2_sf_toino4(args); |
1020 | ||
1da177e4 | 1021 | dp = args->dp; |
1c55cece | 1022 | mp = dp->i_mount; |
1da177e4 LT |
1023 | |
1024 | /* | |
1025 | * Copy the old directory to the buffer. | |
1026 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1027 | * Don't want xfs_idata_realloc copying the data here. | |
1028 | */ | |
1029 | oldsize = dp->i_df.if_bytes; | |
1030 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1031 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1032 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1033 | memcpy(buf, oldsfp, oldsize); |
1034 | /* | |
1035 | * Compute the new inode size. | |
1036 | */ | |
1037 | newsize = | |
1038 | oldsize - | |
ac8ba50f | 1039 | (oldsfp->count + 1) * |
1da177e4 LT |
1040 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1041 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1042 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1043 | /* | |
1044 | * Reset our pointers, the data has moved. | |
1045 | */ | |
ac8ba50f CH |
1046 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1047 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1048 | /* |
1049 | * Fill in the new header. | |
1050 | */ | |
ac8ba50f CH |
1051 | sfp->count = oldsfp->count; |
1052 | sfp->i8count = 0; | |
4740175e | 1053 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1054 | /* |
1055 | * Copy the entries field by field. | |
1056 | */ | |
bbaaf538 CH |
1057 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1058 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1059 | i < sfp->count; |
32c5483a DC |
1060 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1061 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1062 | sfep->namelen = oldsfep->namelen; |
1063 | sfep->offset = oldsfep->offset; | |
1064 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1065 | dp->d_ops->sf_put_ino(sfp, sfep, |
1066 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1067 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1068 | } |
1069 | /* | |
1070 | * Clean up the inode. | |
1071 | */ | |
f0e2d93c | 1072 | kmem_free(buf); |
1da177e4 LT |
1073 | dp->i_d.di_size = newsize; |
1074 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1075 | } | |
1076 | ||
1077 | /* | |
5e06d148 ES |
1078 | * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers. |
1079 | * The new entry w/ an 8-byte inode number is not there yet; we leave with | |
1080 | * i8count set to 1, but no corresponding 8-byte entry. | |
1da177e4 LT |
1081 | */ |
1082 | static void | |
1083 | xfs_dir2_sf_toino8( | |
1084 | xfs_da_args_t *args) /* operation arguments */ | |
1085 | { | |
1086 | char *buf; /* old dir's buffer */ | |
1087 | xfs_inode_t *dp; /* incore directory inode */ | |
1088 | int i; /* entry index */ | |
1da177e4 LT |
1089 | int newsize; /* new inode size */ |
1090 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1091 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1092 | int oldsize; /* old inode size */ |
1093 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1094 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1095 | struct xfs_mount *mp; |
1da177e4 | 1096 | |
0b1b213f CH |
1097 | trace_xfs_dir2_sf_toino8(args); |
1098 | ||
1da177e4 | 1099 | dp = args->dp; |
1c55cece | 1100 | mp = dp->i_mount; |
1da177e4 LT |
1101 | |
1102 | /* | |
1103 | * Copy the old directory to the buffer. | |
1104 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1105 | * Don't want xfs_idata_realloc copying the data here. | |
1106 | */ | |
1107 | oldsize = dp->i_df.if_bytes; | |
1108 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1109 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1110 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1111 | memcpy(buf, oldsfp, oldsize); |
1112 | /* | |
5e06d148 | 1113 | * Compute the new inode size (nb: entry count + 1 for parent) |
1da177e4 LT |
1114 | */ |
1115 | newsize = | |
1116 | oldsize + | |
ac8ba50f | 1117 | (oldsfp->count + 1) * |
1da177e4 LT |
1118 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1119 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1120 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1121 | /* | |
1122 | * Reset our pointers, the data has moved. | |
1123 | */ | |
ac8ba50f CH |
1124 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1125 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1126 | /* |
1127 | * Fill in the new header. | |
1128 | */ | |
ac8ba50f CH |
1129 | sfp->count = oldsfp->count; |
1130 | sfp->i8count = 1; | |
4740175e | 1131 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1132 | /* |
1133 | * Copy the entries field by field. | |
1134 | */ | |
bbaaf538 CH |
1135 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1136 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1137 | i < sfp->count; |
32c5483a DC |
1138 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1139 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1140 | sfep->namelen = oldsfep->namelen; |
1141 | sfep->offset = oldsfep->offset; | |
1142 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1143 | dp->d_ops->sf_put_ino(sfp, sfep, |
1144 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1145 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1146 | } |
1147 | /* | |
1148 | * Clean up the inode. | |
1149 | */ | |
f0e2d93c | 1150 | kmem_free(buf); |
1da177e4 LT |
1151 | dp->i_d.di_size = newsize; |
1152 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1153 | } |