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" |
da353b0d | 24 | #include "xfs_ag.h" |
1da177e4 | 25 | #include "xfs_mount.h" |
57062787 | 26 | #include "xfs_da_format.h" |
a844f451 | 27 | #include "xfs_da_btree.h" |
1da177e4 | 28 | #include "xfs_inode.h" |
239880ef | 29 | #include "xfs_trans.h" |
a844f451 | 30 | #include "xfs_inode_item.h" |
1da177e4 | 31 | #include "xfs_error.h" |
2b9ab5ab | 32 | #include "xfs_dir2.h" |
57926640 | 33 | #include "xfs_dir2_priv.h" |
0b1b213f | 34 | #include "xfs_trace.h" |
a4fbe6ab | 35 | #include "xfs_dinode.h" |
1da177e4 LT |
36 | |
37 | /* | |
38 | * Prototypes for internal functions. | |
39 | */ | |
40 | static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, | |
41 | xfs_dir2_sf_entry_t *sfep, | |
42 | xfs_dir2_data_aoff_t offset, | |
43 | int new_isize); | |
44 | static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, | |
45 | int new_isize); | |
46 | static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, | |
47 | xfs_dir2_sf_entry_t **sfepp, | |
48 | xfs_dir2_data_aoff_t *offsetp); | |
49 | #ifdef DEBUG | |
50 | static void xfs_dir2_sf_check(xfs_da_args_t *args); | |
51 | #else | |
52 | #define xfs_dir2_sf_check(args) | |
53 | #endif /* DEBUG */ | |
54 | #if XFS_BIG_INUMS | |
55 | static void xfs_dir2_sf_toino4(xfs_da_args_t *args); | |
56 | static void xfs_dir2_sf_toino8(xfs_da_args_t *args); | |
57 | #endif /* XFS_BIG_INUMS */ | |
58 | ||
59 | /* | |
60 | * Given a block directory (dp/block), calculate its size as a shortform (sf) | |
61 | * directory and a header for the sf directory, if it will fit it the | |
62 | * space currently present in the inode. If it won't fit, the output | |
63 | * size is too big (but not accurate). | |
64 | */ | |
65 | int /* size for sf form */ | |
66 | xfs_dir2_block_sfsize( | |
67 | xfs_inode_t *dp, /* incore inode pointer */ | |
4f6ae1a4 | 68 | xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
1da177e4 LT |
69 | xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
70 | { | |
71 | xfs_dir2_dataptr_t addr; /* data entry address */ | |
72 | xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ | |
73 | xfs_dir2_block_tail_t *btp; /* tail area of the block */ | |
74 | int count; /* shortform entry count */ | |
75 | xfs_dir2_data_entry_t *dep; /* data entry in the block */ | |
76 | int i; /* block entry index */ | |
77 | int i8count; /* count of big-inode entries */ | |
78 | int isdot; /* entry is "." */ | |
79 | int isdotdot; /* entry is ".." */ | |
80 | xfs_mount_t *mp; /* mount structure pointer */ | |
81 | int namelen; /* total name bytes */ | |
5bde1ba9 | 82 | xfs_ino_t parent = 0; /* parent inode number */ |
1da177e4 | 83 | int size=0; /* total computed size */ |
0cb97766 | 84 | int has_ftype; |
1da177e4 LT |
85 | |
86 | mp = dp->i_mount; | |
87 | ||
0cb97766 DC |
88 | /* |
89 | * if there is a filetype field, add the extra byte to the namelen | |
90 | * for each entry that we see. | |
91 | */ | |
92 | has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0; | |
93 | ||
1da177e4 | 94 | count = i8count = namelen = 0; |
4f6ae1a4 | 95 | btp = xfs_dir2_block_tail_p(mp, hdr); |
bbaaf538 | 96 | blp = xfs_dir2_block_leaf_p(btp); |
1da177e4 LT |
97 | |
98 | /* | |
99 | * Iterate over the block's data entries by using the leaf pointers. | |
100 | */ | |
e922fffa | 101 | for (i = 0; i < be32_to_cpu(btp->count); i++) { |
3c1f9c15 | 102 | if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
1da177e4 LT |
103 | continue; |
104 | /* | |
105 | * Calculate the pointer to the entry at hand. | |
106 | */ | |
107 | dep = (xfs_dir2_data_entry_t *) | |
4f6ae1a4 | 108 | ((char *)hdr + xfs_dir2_dataptr_to_off(mp, addr)); |
1da177e4 LT |
109 | /* |
110 | * Detect . and .., so we can special-case them. | |
111 | * . is not included in sf directories. | |
112 | * .. is included by just the parent inode number. | |
113 | */ | |
114 | isdot = dep->namelen == 1 && dep->name[0] == '.'; | |
115 | isdotdot = | |
116 | dep->namelen == 2 && | |
117 | dep->name[0] == '.' && dep->name[1] == '.'; | |
118 | #if XFS_BIG_INUMS | |
119 | if (!isdot) | |
ff9901c1 | 120 | i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
1da177e4 | 121 | #endif |
0cb97766 | 122 | /* take into account the file type field */ |
1da177e4 LT |
123 | if (!isdot && !isdotdot) { |
124 | count++; | |
0cb97766 | 125 | namelen += dep->namelen + has_ftype; |
1da177e4 | 126 | } else if (isdotdot) |
ff9901c1 | 127 | parent = be64_to_cpu(dep->inumber); |
1da177e4 LT |
128 | /* |
129 | * Calculate the new size, see if we should give up yet. | |
130 | */ | |
bbaaf538 | 131 | size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
1da177e4 LT |
132 | count + /* namelen */ |
133 | count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */ | |
134 | namelen + /* name */ | |
135 | (i8count ? /* inumber */ | |
136 | (uint)sizeof(xfs_dir2_ino8_t) * count : | |
137 | (uint)sizeof(xfs_dir2_ino4_t) * count); | |
138 | if (size > XFS_IFORK_DSIZE(dp)) | |
139 | return size; /* size value is a failure */ | |
140 | } | |
141 | /* | |
142 | * Create the output header, if it worked. | |
143 | */ | |
144 | sfhp->count = count; | |
145 | sfhp->i8count = i8count; | |
4740175e | 146 | dp->d_ops->sf_put_parent_ino(sfhp, parent); |
1da177e4 LT |
147 | return size; |
148 | } | |
149 | ||
150 | /* | |
151 | * Convert a block format directory to shortform. | |
152 | * Caller has already checked that it will fit, and built us a header. | |
153 | */ | |
154 | int /* error */ | |
155 | xfs_dir2_block_to_sf( | |
156 | xfs_da_args_t *args, /* operation arguments */ | |
1d9025e5 | 157 | struct xfs_buf *bp, |
1da177e4 LT |
158 | int size, /* shortform directory size */ |
159 | xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */ | |
160 | { | |
a64b0417 | 161 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
1da177e4 LT |
162 | xfs_dir2_block_tail_t *btp; /* block tail pointer */ |
163 | xfs_dir2_data_entry_t *dep; /* data entry pointer */ | |
164 | xfs_inode_t *dp; /* incore directory inode */ | |
165 | xfs_dir2_data_unused_t *dup; /* unused data pointer */ | |
166 | char *endptr; /* end of data entries */ | |
167 | int error; /* error return value */ | |
168 | int logflags; /* inode logging flags */ | |
169 | xfs_mount_t *mp; /* filesystem mount point */ | |
170 | char *ptr; /* current data pointer */ | |
171 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 172 | xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */ |
b3f03bac | 173 | xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */ |
1da177e4 | 174 | |
0b1b213f CH |
175 | trace_xfs_dir2_block_to_sf(args); |
176 | ||
1da177e4 LT |
177 | dp = args->dp; |
178 | mp = dp->i_mount; | |
179 | ||
180 | /* | |
b3f03bac DC |
181 | * allocate a temporary destination buffer the size of the inode |
182 | * to format the data into. Once we have formatted the data, we | |
183 | * can free the block and copy the formatted data into the inode literal | |
184 | * area. | |
1da177e4 | 185 | */ |
b3f03bac DC |
186 | dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP); |
187 | hdr = bp->b_addr; | |
4f6ae1a4 | 188 | |
1da177e4 LT |
189 | /* |
190 | * Copy the header into the newly allocate local space. | |
191 | */ | |
b3f03bac | 192 | sfp = (xfs_dir2_sf_hdr_t *)dst; |
bbaaf538 | 193 | memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
b3f03bac | 194 | |
1da177e4 LT |
195 | /* |
196 | * Set up to loop over the block's entries. | |
197 | */ | |
a64b0417 | 198 | btp = xfs_dir2_block_tail_p(mp, hdr); |
2ca98774 | 199 | ptr = (char *)dp->d_ops->data_entry_p(hdr); |
bbaaf538 CH |
200 | endptr = (char *)xfs_dir2_block_leaf_p(btp); |
201 | sfep = xfs_dir2_sf_firstentry(sfp); | |
1da177e4 LT |
202 | /* |
203 | * Loop over the active and unused entries. | |
204 | * Stop when we reach the leaf/tail portion of the block. | |
205 | */ | |
206 | while (ptr < endptr) { | |
207 | /* | |
208 | * If it's unused, just skip over it. | |
209 | */ | |
210 | dup = (xfs_dir2_data_unused_t *)ptr; | |
ad354eb3 NS |
211 | if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
212 | ptr += be16_to_cpu(dup->length); | |
1da177e4 LT |
213 | continue; |
214 | } | |
215 | dep = (xfs_dir2_data_entry_t *)ptr; | |
216 | /* | |
217 | * Skip . | |
218 | */ | |
219 | if (dep->namelen == 1 && dep->name[0] == '.') | |
ff9901c1 | 220 | ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
1da177e4 LT |
221 | /* |
222 | * Skip .., but make sure the inode number is right. | |
223 | */ | |
224 | else if (dep->namelen == 2 && | |
225 | dep->name[0] == '.' && dep->name[1] == '.') | |
ff9901c1 | 226 | ASSERT(be64_to_cpu(dep->inumber) == |
4740175e | 227 | dp->d_ops->sf_get_parent_ino(sfp)); |
1da177e4 LT |
228 | /* |
229 | * Normal entry, copy it into shortform. | |
230 | */ | |
231 | else { | |
232 | sfep->namelen = dep->namelen; | |
bbaaf538 | 233 | xfs_dir2_sf_put_offset(sfep, |
1da177e4 | 234 | (xfs_dir2_data_aoff_t) |
a64b0417 | 235 | ((char *)dep - (char *)hdr)); |
1da177e4 | 236 | memcpy(sfep->name, dep->name, dep->namelen); |
4740175e DC |
237 | dp->d_ops->sf_put_ino(sfp, sfep, |
238 | be64_to_cpu(dep->inumber)); | |
239 | dp->d_ops->sf_put_ftype(sfep, | |
9d23fc85 | 240 | dp->d_ops->data_get_ftype(dep)); |
8bc38787 | 241 | |
32c5483a | 242 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 | 243 | } |
9d23fc85 | 244 | ptr += dp->d_ops->data_entsize(dep->namelen); |
1da177e4 LT |
245 | } |
246 | ASSERT((char *)sfep - (char *)sfp == size); | |
b3f03bac DC |
247 | |
248 | /* now we are done with the block, we can shrink the inode */ | |
249 | logflags = XFS_ILOG_CORE; | |
250 | error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp); | |
251 | if (error) { | |
252 | ASSERT(error != ENOSPC); | |
253 | goto out; | |
254 | } | |
255 | ||
256 | /* | |
257 | * The buffer is now unconditionally gone, whether | |
258 | * xfs_dir2_shrink_inode worked or not. | |
259 | * | |
260 | * Convert the inode to local format and copy the data in. | |
261 | */ | |
262 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; | |
263 | dp->i_df.if_flags |= XFS_IFINLINE; | |
264 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
265 | ASSERT(dp->i_df.if_bytes == 0); | |
266 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
267 | ||
268 | logflags |= XFS_ILOG_DDATA; | |
269 | memcpy(dp->i_df.if_u1.if_data, dst, size); | |
270 | dp->i_d.di_size = size; | |
1da177e4 LT |
271 | xfs_dir2_sf_check(args); |
272 | out: | |
273 | xfs_trans_log_inode(args->trans, dp, logflags); | |
b3f03bac | 274 | kmem_free(dst); |
1da177e4 LT |
275 | return error; |
276 | } | |
277 | ||
278 | /* | |
279 | * Add a name to a shortform directory. | |
280 | * There are two algorithms, "easy" and "hard" which we decide on | |
281 | * before changing anything. | |
282 | * Convert to block form if necessary, if the new entry won't fit. | |
283 | */ | |
284 | int /* error */ | |
285 | xfs_dir2_sf_addname( | |
286 | xfs_da_args_t *args) /* operation arguments */ | |
287 | { | |
1da177e4 LT |
288 | xfs_inode_t *dp; /* incore directory inode */ |
289 | int error; /* error return value */ | |
290 | int incr_isize; /* total change in size */ | |
291 | int new_isize; /* di_size after adding name */ | |
292 | int objchange; /* changing to 8-byte inodes */ | |
5bde1ba9 | 293 | xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
1da177e4 | 294 | int pick; /* which algorithm to use */ |
ac8ba50f | 295 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5bde1ba9 | 296 | xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
1da177e4 | 297 | |
0b1b213f CH |
298 | trace_xfs_dir2_sf_addname(args); |
299 | ||
1da177e4 LT |
300 | ASSERT(xfs_dir2_sf_lookup(args) == ENOENT); |
301 | dp = args->dp; | |
302 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
303 | /* | |
304 | * Make sure the shortform value has some of its header. | |
305 | */ | |
306 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
307 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
308 | return XFS_ERROR(EIO); | |
309 | } | |
310 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
311 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
312 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
313 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
314 | /* |
315 | * Compute entry (and change in) size. | |
316 | */ | |
5e06d148 | 317 | incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
318 | objchange = 0; |
319 | #if XFS_BIG_INUMS | |
320 | /* | |
321 | * Do we have to change to 8 byte inodes? | |
322 | */ | |
ac8ba50f | 323 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 | 324 | /* |
5e06d148 | 325 | * Yes, adjust the inode size. old count + (parent + new) |
1da177e4 | 326 | */ |
1da177e4 | 327 | incr_isize += |
ac8ba50f | 328 | (sfp->count + 2) * |
1da177e4 LT |
329 | ((uint)sizeof(xfs_dir2_ino8_t) - |
330 | (uint)sizeof(xfs_dir2_ino4_t)); | |
331 | objchange = 1; | |
332 | } | |
333 | #endif | |
5e06d148 | 334 | new_isize = (int)dp->i_d.di_size + incr_isize; |
1da177e4 LT |
335 | /* |
336 | * Won't fit as shortform any more (due to size), | |
337 | * or the pick routine says it won't (due to offset values). | |
338 | */ | |
339 | if (new_isize > XFS_IFORK_DSIZE(dp) || | |
340 | (pick = | |
341 | xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { | |
342 | /* | |
343 | * Just checking or no space reservation, it doesn't fit. | |
344 | */ | |
6a178100 | 345 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
1da177e4 LT |
346 | return XFS_ERROR(ENOSPC); |
347 | /* | |
348 | * Convert to block form then add the name. | |
349 | */ | |
350 | error = xfs_dir2_sf_to_block(args); | |
351 | if (error) | |
352 | return error; | |
353 | return xfs_dir2_block_addname(args); | |
354 | } | |
355 | /* | |
356 | * Just checking, it fits. | |
357 | */ | |
6a178100 | 358 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
1da177e4 LT |
359 | return 0; |
360 | /* | |
361 | * Do it the easy way - just add it at the end. | |
362 | */ | |
363 | if (pick == 1) | |
364 | xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); | |
365 | /* | |
366 | * Do it the hard way - look for a place to insert the new entry. | |
367 | * Convert to 8 byte inode numbers first if necessary. | |
368 | */ | |
369 | else { | |
370 | ASSERT(pick == 2); | |
371 | #if XFS_BIG_INUMS | |
372 | if (objchange) | |
373 | xfs_dir2_sf_toino8(args); | |
374 | #endif | |
375 | xfs_dir2_sf_addname_hard(args, objchange, new_isize); | |
376 | } | |
377 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* | |
382 | * Add the new entry the "easy" way. | |
383 | * This is copying the old directory and adding the new entry at the end. | |
384 | * Since it's sorted by "offset" we need room after the last offset | |
385 | * that's already there, and then room to convert to a block directory. | |
386 | * This is already checked by the pick routine. | |
387 | */ | |
388 | static void | |
389 | xfs_dir2_sf_addname_easy( | |
390 | xfs_da_args_t *args, /* operation arguments */ | |
391 | xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ | |
392 | xfs_dir2_data_aoff_t offset, /* offset to use for new ent */ | |
393 | int new_isize) /* new directory size */ | |
394 | { | |
395 | int byteoff; /* byte offset in sf dir */ | |
396 | xfs_inode_t *dp; /* incore directory inode */ | |
ac8ba50f | 397 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
398 | |
399 | dp = args->dp; | |
400 | ||
ac8ba50f | 401 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
402 | byteoff = (int)((char *)sfep - (char *)sfp); |
403 | /* | |
404 | * Grow the in-inode space. | |
405 | */ | |
32c5483a | 406 | xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen), |
0cb97766 | 407 | XFS_DATA_FORK); |
1da177e4 LT |
408 | /* |
409 | * Need to set up again due to realloc of the inode data. | |
410 | */ | |
ac8ba50f | 411 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
412 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
413 | /* | |
414 | * Fill in the new entry. | |
415 | */ | |
416 | sfep->namelen = args->namelen; | |
bbaaf538 | 417 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 418 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
419 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
420 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1c55cece | 421 | |
1da177e4 LT |
422 | /* |
423 | * Update the header and inode. | |
424 | */ | |
ac8ba50f | 425 | sfp->count++; |
1da177e4 LT |
426 | #if XFS_BIG_INUMS |
427 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) | |
ac8ba50f | 428 | sfp->i8count++; |
1da177e4 LT |
429 | #endif |
430 | dp->i_d.di_size = new_isize; | |
431 | xfs_dir2_sf_check(args); | |
432 | } | |
433 | ||
434 | /* | |
435 | * Add the new entry the "hard" way. | |
436 | * The caller has already converted to 8 byte inode numbers if necessary, | |
437 | * in which case we need to leave the i8count at 1. | |
438 | * Find a hole that the new entry will fit into, and copy | |
439 | * the first part of the entries, the new entry, and the last part of | |
440 | * the entries. | |
441 | */ | |
442 | /* ARGSUSED */ | |
443 | static void | |
444 | xfs_dir2_sf_addname_hard( | |
445 | xfs_da_args_t *args, /* operation arguments */ | |
446 | int objchange, /* changing inode number size */ | |
447 | int new_isize) /* new directory size */ | |
448 | { | |
449 | int add_datasize; /* data size need for new ent */ | |
450 | char *buf; /* buffer for old */ | |
451 | xfs_inode_t *dp; /* incore directory inode */ | |
452 | int eof; /* reached end of old dir */ | |
453 | int nbytes; /* temp for byte copies */ | |
454 | xfs_dir2_data_aoff_t new_offset; /* next offset value */ | |
455 | xfs_dir2_data_aoff_t offset; /* current offset value */ | |
456 | int old_isize; /* previous di_size */ | |
457 | xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ | |
ac8ba50f | 458 | xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
1da177e4 | 459 | xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
ac8ba50f | 460 | xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
0cb97766 | 461 | struct xfs_mount *mp; |
1da177e4 LT |
462 | |
463 | /* | |
464 | * Copy the old directory to the stack buffer. | |
465 | */ | |
466 | dp = args->dp; | |
0cb97766 | 467 | mp = dp->i_mount; |
1da177e4 | 468 | |
ac8ba50f | 469 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
470 | old_isize = (int)dp->i_d.di_size; |
471 | buf = kmem_alloc(old_isize, KM_SLEEP); | |
ac8ba50f | 472 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1da177e4 LT |
473 | memcpy(oldsfp, sfp, old_isize); |
474 | /* | |
475 | * Loop over the old directory finding the place we're going | |
476 | * to insert the new entry. | |
477 | * If it's going to end up at the end then oldsfep will point there. | |
478 | */ | |
1c9a5b2e | 479 | for (offset = dp->d_ops->data_first_offset, |
bbaaf538 | 480 | oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
9d23fc85 | 481 | add_datasize = dp->d_ops->data_entsize(args->namelen), |
1da177e4 LT |
482 | eof = (char *)oldsfep == &buf[old_isize]; |
483 | !eof; | |
9d23fc85 | 484 | offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen), |
32c5483a | 485 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep), |
1da177e4 | 486 | eof = (char *)oldsfep == &buf[old_isize]) { |
bbaaf538 | 487 | new_offset = xfs_dir2_sf_get_offset(oldsfep); |
1da177e4 LT |
488 | if (offset + add_datasize <= new_offset) |
489 | break; | |
490 | } | |
491 | /* | |
492 | * Get rid of the old directory, then allocate space for | |
493 | * the new one. We do this so xfs_idata_realloc won't copy | |
494 | * the data. | |
495 | */ | |
496 | xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); | |
497 | xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); | |
498 | /* | |
499 | * Reset the pointer since the buffer was reallocated. | |
500 | */ | |
ac8ba50f | 501 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
502 | /* |
503 | * Copy the first part of the directory, including the header. | |
504 | */ | |
505 | nbytes = (int)((char *)oldsfep - (char *)oldsfp); | |
506 | memcpy(sfp, oldsfp, nbytes); | |
507 | sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); | |
508 | /* | |
509 | * Fill in the new entry, and update the header counts. | |
510 | */ | |
511 | sfep->namelen = args->namelen; | |
bbaaf538 | 512 | xfs_dir2_sf_put_offset(sfep, offset); |
1da177e4 | 513 | memcpy(sfep->name, args->name, sfep->namelen); |
4740175e DC |
514 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
515 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
ac8ba50f | 516 | sfp->count++; |
1da177e4 LT |
517 | #if XFS_BIG_INUMS |
518 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) | |
ac8ba50f | 519 | sfp->i8count++; |
1da177e4 LT |
520 | #endif |
521 | /* | |
522 | * If there's more left to copy, do that. | |
523 | */ | |
524 | if (!eof) { | |
32c5483a | 525 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
526 | memcpy(sfep, oldsfep, old_isize - nbytes); |
527 | } | |
f0e2d93c | 528 | kmem_free(buf); |
1da177e4 LT |
529 | dp->i_d.di_size = new_isize; |
530 | xfs_dir2_sf_check(args); | |
531 | } | |
532 | ||
533 | /* | |
534 | * Decide if the new entry will fit at all. | |
535 | * If it will fit, pick between adding the new entry to the end (easy) | |
536 | * or somewhere else (hard). | |
537 | * Return 0 (won't fit), 1 (easy), 2 (hard). | |
538 | */ | |
539 | /*ARGSUSED*/ | |
540 | static int /* pick result */ | |
541 | xfs_dir2_sf_addname_pick( | |
542 | xfs_da_args_t *args, /* operation arguments */ | |
543 | int objchange, /* inode # size changes */ | |
544 | xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ | |
545 | xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ | |
546 | { | |
547 | xfs_inode_t *dp; /* incore directory inode */ | |
548 | int holefit; /* found hole it will fit in */ | |
549 | int i; /* entry number */ | |
550 | xfs_mount_t *mp; /* filesystem mount point */ | |
551 | xfs_dir2_data_aoff_t offset; /* data block offset */ | |
552 | xfs_dir2_sf_entry_t *sfep; /* shortform entry */ | |
ac8ba50f | 553 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
554 | int size; /* entry's data size */ |
555 | int used; /* data bytes used */ | |
556 | ||
557 | dp = args->dp; | |
558 | mp = dp->i_mount; | |
559 | ||
ac8ba50f | 560 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
9d23fc85 | 561 | size = dp->d_ops->data_entsize(args->namelen); |
1c9a5b2e | 562 | offset = dp->d_ops->data_first_offset; |
bbaaf538 | 563 | sfep = xfs_dir2_sf_firstentry(sfp); |
1da177e4 LT |
564 | holefit = 0; |
565 | /* | |
566 | * Loop over sf entries. | |
567 | * Keep track of data offset and whether we've seen a place | |
568 | * to insert the new entry. | |
569 | */ | |
ac8ba50f | 570 | for (i = 0; i < sfp->count; i++) { |
1da177e4 | 571 | if (!holefit) |
bbaaf538 CH |
572 | holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
573 | offset = xfs_dir2_sf_get_offset(sfep) + | |
9d23fc85 | 574 | dp->d_ops->data_entsize(sfep->namelen); |
32c5483a | 575 | sfep = dp->d_ops->sf_nextentry(sfp, sfep); |
1da177e4 LT |
576 | } |
577 | /* | |
578 | * Calculate data bytes used excluding the new entry, if this | |
579 | * was a data block (block form directory). | |
580 | */ | |
581 | used = offset + | |
ac8ba50f | 582 | (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
1da177e4 LT |
583 | (uint)sizeof(xfs_dir2_block_tail_t); |
584 | /* | |
585 | * If it won't fit in a block form then we can't insert it, | |
586 | * we'll go back, convert to block, then try the insert and convert | |
587 | * to leaf. | |
588 | */ | |
589 | if (used + (holefit ? 0 : size) > mp->m_dirblksize) | |
590 | return 0; | |
591 | /* | |
592 | * If changing the inode number size, do it the hard way. | |
593 | */ | |
594 | #if XFS_BIG_INUMS | |
595 | if (objchange) { | |
596 | return 2; | |
597 | } | |
598 | #else | |
599 | ASSERT(objchange == 0); | |
600 | #endif | |
601 | /* | |
602 | * If it won't fit at the end then do it the hard way (use the hole). | |
603 | */ | |
604 | if (used + size > mp->m_dirblksize) | |
605 | return 2; | |
606 | /* | |
607 | * Do it the easy way. | |
608 | */ | |
609 | *sfepp = sfep; | |
610 | *offsetp = offset; | |
611 | return 1; | |
612 | } | |
613 | ||
614 | #ifdef DEBUG | |
615 | /* | |
616 | * Check consistency of shortform directory, assert if bad. | |
617 | */ | |
618 | static void | |
619 | xfs_dir2_sf_check( | |
620 | xfs_da_args_t *args) /* operation arguments */ | |
621 | { | |
622 | xfs_inode_t *dp; /* incore directory inode */ | |
623 | int i; /* entry number */ | |
624 | int i8count; /* number of big inode#s */ | |
625 | xfs_ino_t ino; /* entry inode number */ | |
626 | int offset; /* data offset */ | |
627 | xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ | |
ac8ba50f | 628 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
0cb97766 | 629 | struct xfs_mount *mp; |
1da177e4 LT |
630 | |
631 | dp = args->dp; | |
0cb97766 | 632 | mp = dp->i_mount; |
1da177e4 | 633 | |
ac8ba50f | 634 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1c9a5b2e | 635 | offset = dp->d_ops->data_first_offset; |
4740175e | 636 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
637 | i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
638 | ||
bbaaf538 | 639 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
ac8ba50f | 640 | i < sfp->count; |
32c5483a | 641 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
bbaaf538 | 642 | ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
4740175e | 643 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
644 | i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
645 | offset = | |
bbaaf538 | 646 | xfs_dir2_sf_get_offset(sfep) + |
9d23fc85 | 647 | dp->d_ops->data_entsize(sfep->namelen); |
4740175e | 648 | ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX); |
1da177e4 | 649 | } |
ac8ba50f | 650 | ASSERT(i8count == sfp->i8count); |
1da177e4 LT |
651 | ASSERT(XFS_BIG_INUMS || i8count == 0); |
652 | ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size); | |
653 | ASSERT(offset + | |
ac8ba50f | 654 | (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
0cb97766 | 655 | (uint)sizeof(xfs_dir2_block_tail_t) <= mp->m_dirblksize); |
1da177e4 LT |
656 | } |
657 | #endif /* DEBUG */ | |
658 | ||
659 | /* | |
660 | * Create a new (shortform) directory. | |
661 | */ | |
662 | int /* error, always 0 */ | |
663 | xfs_dir2_sf_create( | |
664 | xfs_da_args_t *args, /* operation arguments */ | |
665 | xfs_ino_t pino) /* parent inode number */ | |
666 | { | |
667 | xfs_inode_t *dp; /* incore directory inode */ | |
668 | int i8count; /* parent inode is an 8-byte number */ | |
ac8ba50f | 669 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 LT |
670 | int size; /* directory size */ |
671 | ||
0b1b213f CH |
672 | trace_xfs_dir2_sf_create(args); |
673 | ||
1da177e4 LT |
674 | dp = args->dp; |
675 | ||
676 | ASSERT(dp != NULL); | |
677 | ASSERT(dp->i_d.di_size == 0); | |
678 | /* | |
679 | * If it's currently a zero-length extent file, | |
680 | * convert it to local format. | |
681 | */ | |
682 | if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) { | |
683 | dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
684 | dp->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
685 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
686 | dp->i_df.if_flags |= XFS_IFINLINE; | |
687 | } | |
688 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
689 | ASSERT(dp->i_df.if_bytes == 0); | |
690 | i8count = pino > XFS_DIR2_MAX_SHORT_INUM; | |
bbaaf538 | 691 | size = xfs_dir2_sf_hdr_size(i8count); |
1da177e4 LT |
692 | /* |
693 | * Make a buffer for the data. | |
694 | */ | |
695 | xfs_idata_realloc(dp, size, XFS_DATA_FORK); | |
696 | /* | |
697 | * Fill in the header, | |
698 | */ | |
ac8ba50f CH |
699 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
700 | sfp->i8count = i8count; | |
1da177e4 LT |
701 | /* |
702 | * Now can put in the inode number, since i8count is set. | |
703 | */ | |
4740175e | 704 | dp->d_ops->sf_put_parent_ino(sfp, pino); |
ac8ba50f | 705 | sfp->count = 0; |
1da177e4 LT |
706 | dp->i_d.di_size = size; |
707 | xfs_dir2_sf_check(args); | |
708 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
709 | return 0; | |
710 | } | |
711 | ||
1da177e4 LT |
712 | /* |
713 | * Lookup an entry in a shortform directory. | |
714 | * Returns EEXIST if found, ENOENT if not found. | |
715 | */ | |
716 | int /* error */ | |
717 | xfs_dir2_sf_lookup( | |
718 | xfs_da_args_t *args) /* operation arguments */ | |
719 | { | |
720 | xfs_inode_t *dp; /* incore directory inode */ | |
721 | int i; /* entry index */ | |
384f3ced | 722 | int error; |
1da177e4 | 723 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
ac8ba50f | 724 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
5163f95a | 725 | enum xfs_dacmp cmp; /* comparison result */ |
384f3ced | 726 | xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
1da177e4 | 727 | |
0b1b213f CH |
728 | trace_xfs_dir2_sf_lookup(args); |
729 | ||
1da177e4 LT |
730 | xfs_dir2_sf_check(args); |
731 | dp = args->dp; | |
732 | ||
733 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
734 | /* | |
735 | * Bail out if the directory is way too short. | |
736 | */ | |
737 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
738 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
739 | return XFS_ERROR(EIO); | |
740 | } | |
741 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
742 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
743 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
744 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
745 | /* |
746 | * Special case for . | |
747 | */ | |
748 | if (args->namelen == 1 && args->name[0] == '.') { | |
749 | args->inumber = dp->i_ino; | |
5163f95a | 750 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 751 | args->filetype = XFS_DIR3_FT_DIR; |
1da177e4 LT |
752 | return XFS_ERROR(EEXIST); |
753 | } | |
754 | /* | |
755 | * Special case for .. | |
756 | */ | |
757 | if (args->namelen == 2 && | |
758 | args->name[0] == '.' && args->name[1] == '.') { | |
4740175e | 759 | args->inumber = dp->d_ops->sf_get_parent_ino(sfp); |
5163f95a | 760 | args->cmpresult = XFS_CMP_EXACT; |
1c55cece | 761 | args->filetype = XFS_DIR3_FT_DIR; |
1da177e4 LT |
762 | return XFS_ERROR(EEXIST); |
763 | } | |
764 | /* | |
765 | * Loop over all the entries trying to match ours. | |
766 | */ | |
384f3ced | 767 | ci_sfep = NULL; |
ac8ba50f | 768 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 769 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
770 | /* |
771 | * Compare name and if it's an exact match, return the inode | |
772 | * number. If it's the first case-insensitive match, store the | |
773 | * inode number and continue looking for an exact match. | |
774 | */ | |
775 | cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name, | |
776 | sfep->namelen); | |
777 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { | |
778 | args->cmpresult = cmp; | |
4740175e DC |
779 | args->inumber = dp->d_ops->sf_get_ino(sfp, sfep); |
780 | args->filetype = dp->d_ops->sf_get_ftype(sfep); | |
5163f95a BN |
781 | if (cmp == XFS_CMP_EXACT) |
782 | return XFS_ERROR(EEXIST); | |
384f3ced | 783 | ci_sfep = sfep; |
1da177e4 LT |
784 | } |
785 | } | |
6a178100 | 786 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
5163f95a BN |
787 | /* |
788 | * Here, we can only be doing a lookup (not a rename or replace). | |
384f3ced | 789 | * If a case-insensitive match was not found, return ENOENT. |
5163f95a | 790 | */ |
384f3ced BN |
791 | if (!ci_sfep) |
792 | return XFS_ERROR(ENOENT); | |
793 | /* otherwise process the CI match as required by the caller */ | |
794 | error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); | |
795 | return XFS_ERROR(error); | |
1da177e4 LT |
796 | } |
797 | ||
798 | /* | |
799 | * Remove an entry from a shortform directory. | |
800 | */ | |
801 | int /* error */ | |
802 | xfs_dir2_sf_removename( | |
803 | xfs_da_args_t *args) | |
804 | { | |
805 | int byteoff; /* offset of removed entry */ | |
806 | xfs_inode_t *dp; /* incore directory inode */ | |
807 | int entsize; /* this entry's size */ | |
808 | int i; /* shortform entry index */ | |
809 | int newsize; /* new inode size */ | |
810 | int oldsize; /* old inode size */ | |
811 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 812 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 813 | |
0b1b213f CH |
814 | trace_xfs_dir2_sf_removename(args); |
815 | ||
1da177e4 LT |
816 | dp = args->dp; |
817 | ||
818 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
819 | oldsize = (int)dp->i_d.di_size; | |
820 | /* | |
821 | * Bail out if the directory is way too short. | |
822 | */ | |
823 | if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
824 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
825 | return XFS_ERROR(EIO); | |
826 | } | |
827 | ASSERT(dp->i_df.if_bytes == oldsize); | |
828 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
829 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
830 | ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
831 | /* |
832 | * Loop over the old directory entries. | |
833 | * Find the one we're deleting. | |
834 | */ | |
ac8ba50f | 835 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 836 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
837 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
838 | XFS_CMP_EXACT) { | |
4740175e | 839 | ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) == |
8bc38787 | 840 | args->inumber); |
1da177e4 LT |
841 | break; |
842 | } | |
843 | } | |
844 | /* | |
845 | * Didn't find it. | |
846 | */ | |
ac8ba50f | 847 | if (i == sfp->count) |
1da177e4 | 848 | return XFS_ERROR(ENOENT); |
1da177e4 LT |
849 | /* |
850 | * Calculate sizes. | |
851 | */ | |
852 | byteoff = (int)((char *)sfep - (char *)sfp); | |
32c5483a | 853 | entsize = dp->d_ops->sf_entsize(sfp, args->namelen); |
1da177e4 LT |
854 | newsize = oldsize - entsize; |
855 | /* | |
856 | * Copy the part if any after the removed entry, sliding it down. | |
857 | */ | |
858 | if (byteoff + entsize < oldsize) | |
859 | memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, | |
860 | oldsize - (byteoff + entsize)); | |
861 | /* | |
862 | * Fix up the header and file size. | |
863 | */ | |
ac8ba50f | 864 | sfp->count--; |
1da177e4 LT |
865 | dp->i_d.di_size = newsize; |
866 | /* | |
867 | * Reallocate, making it smaller. | |
868 | */ | |
869 | xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); | |
ac8ba50f | 870 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
871 | #if XFS_BIG_INUMS |
872 | /* | |
873 | * Are we changing inode number size? | |
874 | */ | |
875 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
ac8ba50f | 876 | if (sfp->i8count == 1) |
1da177e4 LT |
877 | xfs_dir2_sf_toino4(args); |
878 | else | |
ac8ba50f | 879 | sfp->i8count--; |
1da177e4 LT |
880 | } |
881 | #endif | |
882 | xfs_dir2_sf_check(args); | |
883 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
884 | return 0; | |
885 | } | |
886 | ||
887 | /* | |
888 | * Replace the inode number of an entry in a shortform directory. | |
889 | */ | |
890 | int /* error */ | |
891 | xfs_dir2_sf_replace( | |
892 | xfs_da_args_t *args) /* operation arguments */ | |
893 | { | |
894 | xfs_inode_t *dp; /* incore directory inode */ | |
895 | int i; /* entry index */ | |
896 | #if XFS_BIG_INUMS || defined(DEBUG) | |
897 | xfs_ino_t ino=0; /* entry old inode number */ | |
898 | #endif | |
899 | #if XFS_BIG_INUMS | |
900 | int i8elevated; /* sf_toino8 set i8count=1 */ | |
901 | #endif | |
902 | xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ | |
ac8ba50f | 903 | xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
1da177e4 | 904 | |
0b1b213f CH |
905 | trace_xfs_dir2_sf_replace(args); |
906 | ||
1da177e4 LT |
907 | dp = args->dp; |
908 | ||
909 | ASSERT(dp->i_df.if_flags & XFS_IFINLINE); | |
910 | /* | |
911 | * Bail out if the shortform directory is way too small. | |
912 | */ | |
913 | if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { | |
914 | ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); | |
915 | return XFS_ERROR(EIO); | |
916 | } | |
917 | ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); | |
918 | ASSERT(dp->i_df.if_u1.if_data != NULL); | |
ac8ba50f CH |
919 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
920 | ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); | |
1da177e4 LT |
921 | #if XFS_BIG_INUMS |
922 | /* | |
923 | * New inode number is large, and need to convert to 8-byte inodes. | |
924 | */ | |
ac8ba50f | 925 | if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
1da177e4 LT |
926 | int error; /* error return value */ |
927 | int newsize; /* new inode size */ | |
928 | ||
929 | newsize = | |
930 | dp->i_df.if_bytes + | |
ac8ba50f | 931 | (sfp->count + 1) * |
1da177e4 LT |
932 | ((uint)sizeof(xfs_dir2_ino8_t) - |
933 | (uint)sizeof(xfs_dir2_ino4_t)); | |
934 | /* | |
935 | * Won't fit as shortform, convert to block then do replace. | |
936 | */ | |
937 | if (newsize > XFS_IFORK_DSIZE(dp)) { | |
938 | error = xfs_dir2_sf_to_block(args); | |
939 | if (error) { | |
940 | return error; | |
941 | } | |
942 | return xfs_dir2_block_replace(args); | |
943 | } | |
944 | /* | |
945 | * Still fits, convert to 8-byte now. | |
946 | */ | |
947 | xfs_dir2_sf_toino8(args); | |
948 | i8elevated = 1; | |
ac8ba50f | 949 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1da177e4 LT |
950 | } else |
951 | i8elevated = 0; | |
952 | #endif | |
953 | ASSERT(args->namelen != 1 || args->name[0] != '.'); | |
954 | /* | |
955 | * Replace ..'s entry. | |
956 | */ | |
957 | if (args->namelen == 2 && | |
958 | args->name[0] == '.' && args->name[1] == '.') { | |
959 | #if XFS_BIG_INUMS || defined(DEBUG) | |
4740175e | 960 | ino = dp->d_ops->sf_get_parent_ino(sfp); |
1da177e4 LT |
961 | ASSERT(args->inumber != ino); |
962 | #endif | |
4740175e | 963 | dp->d_ops->sf_put_parent_ino(sfp, args->inumber); |
1da177e4 LT |
964 | } |
965 | /* | |
966 | * Normal entry, look for the name. | |
967 | */ | |
968 | else { | |
0cb97766 | 969 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
32c5483a | 970 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { |
5163f95a BN |
971 | if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
972 | XFS_CMP_EXACT) { | |
1da177e4 | 973 | #if XFS_BIG_INUMS || defined(DEBUG) |
4740175e | 974 | ino = dp->d_ops->sf_get_ino(sfp, sfep); |
1da177e4 LT |
975 | ASSERT(args->inumber != ino); |
976 | #endif | |
4740175e DC |
977 | dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); |
978 | dp->d_ops->sf_put_ftype(sfep, args->filetype); | |
1da177e4 LT |
979 | break; |
980 | } | |
981 | } | |
982 | /* | |
983 | * Didn't find it. | |
984 | */ | |
ac8ba50f | 985 | if (i == sfp->count) { |
6a178100 | 986 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
1da177e4 LT |
987 | #if XFS_BIG_INUMS |
988 | if (i8elevated) | |
989 | xfs_dir2_sf_toino4(args); | |
990 | #endif | |
991 | return XFS_ERROR(ENOENT); | |
992 | } | |
993 | } | |
994 | #if XFS_BIG_INUMS | |
995 | /* | |
996 | * See if the old number was large, the new number is small. | |
997 | */ | |
998 | if (ino > XFS_DIR2_MAX_SHORT_INUM && | |
999 | args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { | |
1000 | /* | |
1001 | * And the old count was one, so need to convert to small. | |
1002 | */ | |
ac8ba50f | 1003 | if (sfp->i8count == 1) |
1da177e4 LT |
1004 | xfs_dir2_sf_toino4(args); |
1005 | else | |
ac8ba50f | 1006 | sfp->i8count--; |
1da177e4 LT |
1007 | } |
1008 | /* | |
1009 | * See if the old number was small, the new number is large. | |
1010 | */ | |
1011 | if (ino <= XFS_DIR2_MAX_SHORT_INUM && | |
1012 | args->inumber > XFS_DIR2_MAX_SHORT_INUM) { | |
1013 | /* | |
1014 | * add to the i8count unless we just converted to 8-byte | |
1015 | * inodes (which does an implied i8count = 1) | |
1016 | */ | |
ac8ba50f | 1017 | ASSERT(sfp->i8count != 0); |
1da177e4 | 1018 | if (!i8elevated) |
ac8ba50f | 1019 | sfp->i8count++; |
1da177e4 LT |
1020 | } |
1021 | #endif | |
1022 | xfs_dir2_sf_check(args); | |
1023 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); | |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | #if XFS_BIG_INUMS | |
1028 | /* | |
1029 | * Convert from 8-byte inode numbers to 4-byte inode numbers. | |
1030 | * The last 8-byte inode number is gone, but the count is still 1. | |
1031 | */ | |
1032 | static void | |
1033 | xfs_dir2_sf_toino4( | |
1034 | xfs_da_args_t *args) /* operation arguments */ | |
1035 | { | |
1036 | char *buf; /* old dir's buffer */ | |
1037 | xfs_inode_t *dp; /* incore directory inode */ | |
1038 | int i; /* entry index */ | |
1da177e4 LT |
1039 | int newsize; /* new inode size */ |
1040 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1041 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1042 | int oldsize; /* old inode size */ |
1043 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1044 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1045 | struct xfs_mount *mp; |
1da177e4 | 1046 | |
0b1b213f CH |
1047 | trace_xfs_dir2_sf_toino4(args); |
1048 | ||
1da177e4 | 1049 | dp = args->dp; |
1c55cece | 1050 | mp = dp->i_mount; |
1da177e4 LT |
1051 | |
1052 | /* | |
1053 | * Copy the old directory to the buffer. | |
1054 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1055 | * Don't want xfs_idata_realloc copying the data here. | |
1056 | */ | |
1057 | oldsize = dp->i_df.if_bytes; | |
1058 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1059 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1060 | ASSERT(oldsfp->i8count == 1); | |
1da177e4 LT |
1061 | memcpy(buf, oldsfp, oldsize); |
1062 | /* | |
1063 | * Compute the new inode size. | |
1064 | */ | |
1065 | newsize = | |
1066 | oldsize - | |
ac8ba50f | 1067 | (oldsfp->count + 1) * |
1da177e4 LT |
1068 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1069 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1070 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1071 | /* | |
1072 | * Reset our pointers, the data has moved. | |
1073 | */ | |
ac8ba50f CH |
1074 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1075 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1076 | /* |
1077 | * Fill in the new header. | |
1078 | */ | |
ac8ba50f CH |
1079 | sfp->count = oldsfp->count; |
1080 | sfp->i8count = 0; | |
4740175e | 1081 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1082 | /* |
1083 | * Copy the entries field by field. | |
1084 | */ | |
bbaaf538 CH |
1085 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1086 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1087 | i < sfp->count; |
32c5483a DC |
1088 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1089 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1090 | sfep->namelen = oldsfep->namelen; |
1091 | sfep->offset = oldsfep->offset; | |
1092 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1093 | dp->d_ops->sf_put_ino(sfp, sfep, |
1094 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1095 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1096 | } |
1097 | /* | |
1098 | * Clean up the inode. | |
1099 | */ | |
f0e2d93c | 1100 | kmem_free(buf); |
1da177e4 LT |
1101 | dp->i_d.di_size = newsize; |
1102 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1103 | } | |
1104 | ||
1105 | /* | |
5e06d148 ES |
1106 | * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers. |
1107 | * The new entry w/ an 8-byte inode number is not there yet; we leave with | |
1108 | * i8count set to 1, but no corresponding 8-byte entry. | |
1da177e4 LT |
1109 | */ |
1110 | static void | |
1111 | xfs_dir2_sf_toino8( | |
1112 | xfs_da_args_t *args) /* operation arguments */ | |
1113 | { | |
1114 | char *buf; /* old dir's buffer */ | |
1115 | xfs_inode_t *dp; /* incore directory inode */ | |
1116 | int i; /* entry index */ | |
1da177e4 LT |
1117 | int newsize; /* new inode size */ |
1118 | xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ | |
ac8ba50f | 1119 | xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
1da177e4 LT |
1120 | int oldsize; /* old inode size */ |
1121 | xfs_dir2_sf_entry_t *sfep; /* new sf entry */ | |
ac8ba50f | 1122 | xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
1c55cece | 1123 | struct xfs_mount *mp; |
1da177e4 | 1124 | |
0b1b213f CH |
1125 | trace_xfs_dir2_sf_toino8(args); |
1126 | ||
1da177e4 | 1127 | dp = args->dp; |
1c55cece | 1128 | mp = dp->i_mount; |
1da177e4 LT |
1129 | |
1130 | /* | |
1131 | * Copy the old directory to the buffer. | |
1132 | * Then nuke it from the inode, and add the new buffer to the inode. | |
1133 | * Don't want xfs_idata_realloc copying the data here. | |
1134 | */ | |
1135 | oldsize = dp->i_df.if_bytes; | |
1136 | buf = kmem_alloc(oldsize, KM_SLEEP); | |
ac8ba50f CH |
1137 | oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
1138 | ASSERT(oldsfp->i8count == 0); | |
1da177e4 LT |
1139 | memcpy(buf, oldsfp, oldsize); |
1140 | /* | |
5e06d148 | 1141 | * Compute the new inode size (nb: entry count + 1 for parent) |
1da177e4 LT |
1142 | */ |
1143 | newsize = | |
1144 | oldsize + | |
ac8ba50f | 1145 | (oldsfp->count + 1) * |
1da177e4 LT |
1146 | ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); |
1147 | xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); | |
1148 | xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); | |
1149 | /* | |
1150 | * Reset our pointers, the data has moved. | |
1151 | */ | |
ac8ba50f CH |
1152 | oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
1153 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; | |
1da177e4 LT |
1154 | /* |
1155 | * Fill in the new header. | |
1156 | */ | |
ac8ba50f CH |
1157 | sfp->count = oldsfp->count; |
1158 | sfp->i8count = 1; | |
4740175e | 1159 | dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); |
1da177e4 LT |
1160 | /* |
1161 | * Copy the entries field by field. | |
1162 | */ | |
bbaaf538 CH |
1163 | for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
1164 | oldsfep = xfs_dir2_sf_firstentry(oldsfp); | |
ac8ba50f | 1165 | i < sfp->count; |
32c5483a DC |
1166 | i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep), |
1167 | oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) { | |
1da177e4 LT |
1168 | sfep->namelen = oldsfep->namelen; |
1169 | sfep->offset = oldsfep->offset; | |
1170 | memcpy(sfep->name, oldsfep->name, sfep->namelen); | |
4740175e DC |
1171 | dp->d_ops->sf_put_ino(sfp, sfep, |
1172 | dp->d_ops->sf_get_ino(oldsfp, oldsfep)); | |
1173 | dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); | |
1da177e4 LT |
1174 | } |
1175 | /* | |
1176 | * Clean up the inode. | |
1177 | */ | |
f0e2d93c | 1178 | kmem_free(buf); |
1da177e4 LT |
1179 | dp->i_d.di_size = newsize; |
1180 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); | |
1181 | } | |
1182 | #endif /* XFS_BIG_INUMS */ |