Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
27 | #include "xfs_dir.h" | |
28 | #include "xfs_dir2.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_mount.h" | |
a844f451 | 31 | #include "xfs_da_btree.h" |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 LT |
34 | #include "xfs_ialloc_btree.h" |
35 | #include "xfs_alloc.h" | |
36 | #include "xfs_btree.h" | |
1da177e4 LT |
37 | #include "xfs_dir_sf.h" |
38 | #include "xfs_dir2_sf.h" | |
a844f451 | 39 | #include "xfs_attr_sf.h" |
1da177e4 | 40 | #include "xfs_dinode.h" |
1da177e4 | 41 | #include "xfs_inode.h" |
a844f451 | 42 | #include "xfs_inode_item.h" |
1da177e4 | 43 | #include "xfs_bmap.h" |
1da177e4 LT |
44 | #include "xfs_attr.h" |
45 | #include "xfs_attr_leaf.h" | |
46 | #include "xfs_error.h" | |
1da177e4 LT |
47 | |
48 | /* | |
49 | * xfs_attr_leaf.c | |
50 | * | |
51 | * Routines to implement leaf blocks of attributes as Btrees of hashed names. | |
52 | */ | |
53 | ||
54 | /*======================================================================== | |
55 | * Function prototypes for the kernel. | |
56 | *========================================================================*/ | |
57 | ||
58 | /* | |
59 | * Routines used for growing the Btree. | |
60 | */ | |
ba0f32d4 CH |
61 | STATIC int xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t which_block, |
62 | xfs_dabuf_t **bpp); | |
1da177e4 LT |
63 | STATIC int xfs_attr_leaf_add_work(xfs_dabuf_t *leaf_buffer, xfs_da_args_t *args, |
64 | int freemap_index); | |
65 | STATIC void xfs_attr_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *leaf_buffer); | |
66 | STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state, | |
67 | xfs_da_state_blk_t *blk1, | |
68 | xfs_da_state_blk_t *blk2); | |
69 | STATIC int xfs_attr_leaf_figure_balance(xfs_da_state_t *state, | |
70 | xfs_da_state_blk_t *leaf_blk_1, | |
71 | xfs_da_state_blk_t *leaf_blk_2, | |
72 | int *number_entries_in_blk1, | |
73 | int *number_usedbytes_in_blk1); | |
74 | ||
ba0f32d4 CH |
75 | /* |
76 | * Routines used for shrinking the Btree. | |
77 | */ | |
78 | STATIC int xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, | |
79 | xfs_dabuf_t *bp, int level); | |
80 | STATIC int xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, | |
81 | xfs_dabuf_t *bp); | |
82 | STATIC int xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp, | |
83 | xfs_dablk_t blkno, int blkcnt); | |
84 | ||
1da177e4 LT |
85 | /* |
86 | * Utility routines. | |
87 | */ | |
88 | STATIC void xfs_attr_leaf_moveents(xfs_attr_leafblock_t *src_leaf, | |
89 | int src_start, | |
90 | xfs_attr_leafblock_t *dst_leaf, | |
91 | int dst_start, int move_count, | |
92 | xfs_mount_t *mp); | |
ba0f32d4 CH |
93 | STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index); |
94 | STATIC int xfs_attr_put_listent(xfs_attr_list_context_t *context, | |
95 | attrnames_t *, char *name, int namelen, | |
96 | int valuelen); | |
1da177e4 LT |
97 | |
98 | ||
99 | /*======================================================================== | |
d8cc890d | 100 | * External routines when attribute fork size < XFS_LITINO(mp). |
1da177e4 LT |
101 | *========================================================================*/ |
102 | ||
103 | /* | |
d8cc890d NS |
104 | * Query whether the requested number of additional bytes of extended |
105 | * attribute space will be able to fit inline. | |
106 | * Returns zero if not, else the di_forkoff fork offset to be used in the | |
107 | * literal area for attribute data once the new bytes have been added. | |
108 | * | |
109 | * di_forkoff must be 8 byte aligned, hence is stored as a >>3 value; | |
110 | * special case for dev/uuid inodes, they have fixed size data forks. | |
1da177e4 LT |
111 | */ |
112 | int | |
d8cc890d NS |
113 | xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes) |
114 | { | |
115 | int offset; | |
116 | int minforkoff; /* lower limit on valid forkoff locations */ | |
117 | int maxforkoff; /* upper limit on valid forkoff locations */ | |
118 | xfs_mount_t *mp = dp->i_mount; | |
119 | ||
d8cc890d NS |
120 | offset = (XFS_LITINO(mp) - bytes) >> 3; /* rounded down */ |
121 | ||
122 | switch (dp->i_d.di_format) { | |
123 | case XFS_DINODE_FMT_DEV: | |
124 | minforkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
125 | return (offset >= minforkoff) ? minforkoff : 0; | |
126 | case XFS_DINODE_FMT_UUID: | |
127 | minforkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
128 | return (offset >= minforkoff) ? minforkoff : 0; | |
129 | } | |
130 | ||
13059ff0 | 131 | if (!(mp->m_flags & XFS_MOUNT_ATTR2)) { |
da087bad NS |
132 | if (bytes <= XFS_IFORK_ASIZE(dp)) |
133 | return mp->m_attroffset >> 3; | |
134 | return 0; | |
135 | } | |
136 | ||
d8cc890d NS |
137 | /* data fork btree root can have at least this many key/ptr pairs */ |
138 | minforkoff = MAX(dp->i_df.if_bytes, XFS_BMDR_SPACE_CALC(MINDBTPTRS)); | |
139 | minforkoff = roundup(minforkoff, 8) >> 3; | |
140 | ||
141 | /* attr fork btree root can have at least this many key/ptr pairs */ | |
142 | maxforkoff = XFS_LITINO(mp) - XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
143 | maxforkoff = maxforkoff >> 3; /* rounded down */ | |
144 | ||
145 | if (offset >= minforkoff && offset < maxforkoff) | |
146 | return offset; | |
147 | if (offset >= maxforkoff) | |
148 | return maxforkoff; | |
149 | return 0; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Switch on the ATTR2 superblock bit (implies also FEATURES2) | |
154 | */ | |
155 | STATIC void | |
156 | xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp) | |
157 | { | |
158 | unsigned long s; | |
159 | ||
13059ff0 | 160 | if ((mp->m_flags & XFS_MOUNT_ATTR2) && |
d8cc890d NS |
161 | !(XFS_SB_VERSION_HASATTR2(&mp->m_sb))) { |
162 | s = XFS_SB_LOCK(mp); | |
163 | if (!XFS_SB_VERSION_HASATTR2(&mp->m_sb)) { | |
164 | XFS_SB_VERSION_ADDATTR2(&mp->m_sb); | |
165 | XFS_SB_UNLOCK(mp, s); | |
166 | xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); | |
167 | } else | |
168 | XFS_SB_UNLOCK(mp, s); | |
169 | } | |
170 | } | |
171 | ||
172 | /* | |
173 | * Create the initial contents of a shortform attribute list. | |
174 | */ | |
175 | void | |
1da177e4 LT |
176 | xfs_attr_shortform_create(xfs_da_args_t *args) |
177 | { | |
178 | xfs_attr_sf_hdr_t *hdr; | |
179 | xfs_inode_t *dp; | |
180 | xfs_ifork_t *ifp; | |
181 | ||
182 | dp = args->dp; | |
183 | ASSERT(dp != NULL); | |
184 | ifp = dp->i_afp; | |
185 | ASSERT(ifp != NULL); | |
186 | ASSERT(ifp->if_bytes == 0); | |
187 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) { | |
188 | ifp->if_flags &= ~XFS_IFEXTENTS; /* just in case */ | |
189 | dp->i_d.di_aformat = XFS_DINODE_FMT_LOCAL; | |
190 | ifp->if_flags |= XFS_IFINLINE; | |
191 | } else { | |
192 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
193 | } | |
194 | xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK); | |
195 | hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data; | |
196 | hdr->count = 0; | |
3b244aa8 | 197 | hdr->totsize = cpu_to_be16(sizeof(*hdr)); |
1da177e4 | 198 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
1da177e4 LT |
199 | } |
200 | ||
201 | /* | |
202 | * Add a name/value pair to the shortform attribute list. | |
203 | * Overflow from the inode has already been checked for. | |
204 | */ | |
d8cc890d NS |
205 | void |
206 | xfs_attr_shortform_add(xfs_da_args_t *args, int forkoff) | |
1da177e4 LT |
207 | { |
208 | xfs_attr_shortform_t *sf; | |
209 | xfs_attr_sf_entry_t *sfe; | |
210 | int i, offset, size; | |
d8cc890d | 211 | xfs_mount_t *mp; |
1da177e4 LT |
212 | xfs_inode_t *dp; |
213 | xfs_ifork_t *ifp; | |
214 | ||
215 | dp = args->dp; | |
d8cc890d NS |
216 | mp = dp->i_mount; |
217 | dp->i_d.di_forkoff = forkoff; | |
218 | dp->i_df.if_ext_max = | |
219 | XFS_IFORK_DSIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t); | |
220 | dp->i_afp->if_ext_max = | |
221 | XFS_IFORK_ASIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t); | |
222 | ||
1da177e4 LT |
223 | ifp = dp->i_afp; |
224 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
225 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
226 | sfe = &sf->list[0]; | |
3b244aa8 | 227 | for (i = 0; i < sf->hdr.count; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
d8cc890d | 228 | #ifdef DEBUG |
1da177e4 LT |
229 | if (sfe->namelen != args->namelen) |
230 | continue; | |
231 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
232 | continue; | |
233 | if (((args->flags & ATTR_SECURE) != 0) != | |
234 | ((sfe->flags & XFS_ATTR_SECURE) != 0)) | |
235 | continue; | |
236 | if (((args->flags & ATTR_ROOT) != 0) != | |
237 | ((sfe->flags & XFS_ATTR_ROOT) != 0)) | |
238 | continue; | |
d8cc890d NS |
239 | ASSERT(0); |
240 | #endif | |
1da177e4 LT |
241 | } |
242 | ||
243 | offset = (char *)sfe - (char *)sf; | |
244 | size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); | |
245 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); | |
246 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
247 | sfe = (xfs_attr_sf_entry_t *)((char *)sf + offset); | |
248 | ||
249 | sfe->namelen = args->namelen; | |
3b244aa8 | 250 | sfe->valuelen = args->valuelen; |
1da177e4 LT |
251 | sfe->flags = (args->flags & ATTR_SECURE) ? XFS_ATTR_SECURE : |
252 | ((args->flags & ATTR_ROOT) ? XFS_ATTR_ROOT : 0); | |
253 | memcpy(sfe->nameval, args->name, args->namelen); | |
254 | memcpy(&sfe->nameval[args->namelen], args->value, args->valuelen); | |
3b244aa8 NS |
255 | sf->hdr.count++; |
256 | be16_add(&sf->hdr.totsize, size); | |
1da177e4 LT |
257 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
258 | ||
d8cc890d | 259 | xfs_sbversion_add_attr2(mp, args->trans); |
1da177e4 LT |
260 | } |
261 | ||
262 | /* | |
d8cc890d | 263 | * Remove an attribute from the shortform attribute list structure. |
1da177e4 LT |
264 | */ |
265 | int | |
266 | xfs_attr_shortform_remove(xfs_da_args_t *args) | |
267 | { | |
268 | xfs_attr_shortform_t *sf; | |
269 | xfs_attr_sf_entry_t *sfe; | |
270 | int base, size=0, end, totsize, i; | |
d8cc890d | 271 | xfs_mount_t *mp; |
1da177e4 LT |
272 | xfs_inode_t *dp; |
273 | ||
1da177e4 | 274 | dp = args->dp; |
d8cc890d | 275 | mp = dp->i_mount; |
1da177e4 LT |
276 | base = sizeof(xfs_attr_sf_hdr_t); |
277 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; | |
278 | sfe = &sf->list[0]; | |
3b244aa8 | 279 | end = sf->hdr.count; |
d8cc890d | 280 | for (i = 0; i < end; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), |
1da177e4 LT |
281 | base += size, i++) { |
282 | size = XFS_ATTR_SF_ENTSIZE(sfe); | |
283 | if (sfe->namelen != args->namelen) | |
284 | continue; | |
285 | if (memcmp(sfe->nameval, args->name, args->namelen) != 0) | |
286 | continue; | |
287 | if (((args->flags & ATTR_SECURE) != 0) != | |
288 | ((sfe->flags & XFS_ATTR_SECURE) != 0)) | |
289 | continue; | |
290 | if (((args->flags & ATTR_ROOT) != 0) != | |
291 | ((sfe->flags & XFS_ATTR_ROOT) != 0)) | |
292 | continue; | |
293 | break; | |
294 | } | |
d8cc890d | 295 | if (i == end) |
1da177e4 LT |
296 | return(XFS_ERROR(ENOATTR)); |
297 | ||
d8cc890d NS |
298 | /* |
299 | * Fix up the attribute fork data, covering the hole | |
300 | */ | |
1da177e4 | 301 | end = base + size; |
3b244aa8 | 302 | totsize = be16_to_cpu(sf->hdr.totsize); |
d8cc890d NS |
303 | if (end != totsize) |
304 | memmove(&((char *)sf)[base], &((char *)sf)[end], totsize - end); | |
3b244aa8 NS |
305 | sf->hdr.count--; |
306 | be16_add(&sf->hdr.totsize, -size); | |
d8cc890d NS |
307 | |
308 | /* | |
309 | * Fix up the start offset of the attribute fork | |
310 | */ | |
311 | totsize -= size; | |
e0144ca5 | 312 | if (totsize == sizeof(xfs_attr_sf_hdr_t) && !args->addname && |
13059ff0 | 313 | (mp->m_flags & XFS_MOUNT_ATTR2)) { |
d8cc890d NS |
314 | /* |
315 | * Last attribute now removed, revert to original | |
316 | * inode format making all literal area available | |
317 | * to the data fork once more. | |
318 | */ | |
319 | xfs_idestroy_fork(dp, XFS_ATTR_FORK); | |
320 | dp->i_d.di_forkoff = 0; | |
321 | dp->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
322 | ASSERT(dp->i_d.di_anextents == 0); | |
323 | ASSERT(dp->i_afp == NULL); | |
324 | dp->i_df.if_ext_max = | |
325 | XFS_IFORK_DSIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t); | |
326 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
327 | } else { | |
328 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
329 | dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize); | |
330 | ASSERT(dp->i_d.di_forkoff); | |
e0144ca5 | 331 | ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) || args->addname || |
13059ff0 | 332 | !(mp->m_flags & XFS_MOUNT_ATTR2)); |
d8cc890d NS |
333 | dp->i_afp->if_ext_max = |
334 | XFS_IFORK_ASIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t); | |
335 | dp->i_df.if_ext_max = | |
336 | XFS_IFORK_DSIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t); | |
337 | xfs_trans_log_inode(args->trans, dp, | |
338 | XFS_ILOG_CORE | XFS_ILOG_ADATA); | |
339 | } | |
340 | ||
341 | xfs_sbversion_add_attr2(mp, args->trans); | |
1da177e4 LT |
342 | |
343 | return(0); | |
344 | } | |
345 | ||
346 | /* | |
347 | * Look up a name in a shortform attribute list structure. | |
348 | */ | |
349 | /*ARGSUSED*/ | |
350 | int | |
351 | xfs_attr_shortform_lookup(xfs_da_args_t *args) | |
352 | { | |
353 | xfs_attr_shortform_t *sf; | |
354 | xfs_attr_sf_entry_t *sfe; | |
355 | int i; | |
356 | xfs_ifork_t *ifp; | |
357 | ||
358 | ifp = args->dp->i_afp; | |
359 | ASSERT(ifp->if_flags & XFS_IFINLINE); | |
360 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
361 | sfe = &sf->list[0]; | |
3b244aa8 | 362 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
363 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
364 | if (sfe->namelen != args->namelen) | |
365 | continue; | |
366 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
367 | continue; | |
368 | if (((args->flags & ATTR_SECURE) != 0) != | |
369 | ((sfe->flags & XFS_ATTR_SECURE) != 0)) | |
370 | continue; | |
371 | if (((args->flags & ATTR_ROOT) != 0) != | |
372 | ((sfe->flags & XFS_ATTR_ROOT) != 0)) | |
373 | continue; | |
374 | return(XFS_ERROR(EEXIST)); | |
375 | } | |
376 | return(XFS_ERROR(ENOATTR)); | |
377 | } | |
378 | ||
379 | /* | |
380 | * Look up a name in a shortform attribute list structure. | |
381 | */ | |
382 | /*ARGSUSED*/ | |
383 | int | |
384 | xfs_attr_shortform_getvalue(xfs_da_args_t *args) | |
385 | { | |
386 | xfs_attr_shortform_t *sf; | |
387 | xfs_attr_sf_entry_t *sfe; | |
388 | int i; | |
389 | ||
390 | ASSERT(args->dp->i_d.di_aformat == XFS_IFINLINE); | |
391 | sf = (xfs_attr_shortform_t *)args->dp->i_afp->if_u1.if_data; | |
392 | sfe = &sf->list[0]; | |
3b244aa8 | 393 | for (i = 0; i < sf->hdr.count; |
1da177e4 LT |
394 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
395 | if (sfe->namelen != args->namelen) | |
396 | continue; | |
397 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) | |
398 | continue; | |
399 | if (((args->flags & ATTR_SECURE) != 0) != | |
400 | ((sfe->flags & XFS_ATTR_SECURE) != 0)) | |
401 | continue; | |
402 | if (((args->flags & ATTR_ROOT) != 0) != | |
403 | ((sfe->flags & XFS_ATTR_ROOT) != 0)) | |
404 | continue; | |
405 | if (args->flags & ATTR_KERNOVAL) { | |
3b244aa8 | 406 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
407 | return(XFS_ERROR(EEXIST)); |
408 | } | |
3b244aa8 NS |
409 | if (args->valuelen < sfe->valuelen) { |
410 | args->valuelen = sfe->valuelen; | |
1da177e4 LT |
411 | return(XFS_ERROR(ERANGE)); |
412 | } | |
3b244aa8 | 413 | args->valuelen = sfe->valuelen; |
1da177e4 LT |
414 | memcpy(args->value, &sfe->nameval[args->namelen], |
415 | args->valuelen); | |
416 | return(XFS_ERROR(EEXIST)); | |
417 | } | |
418 | return(XFS_ERROR(ENOATTR)); | |
419 | } | |
420 | ||
421 | /* | |
422 | * Convert from using the shortform to the leaf. | |
423 | */ | |
424 | int | |
425 | xfs_attr_shortform_to_leaf(xfs_da_args_t *args) | |
426 | { | |
427 | xfs_inode_t *dp; | |
428 | xfs_attr_shortform_t *sf; | |
429 | xfs_attr_sf_entry_t *sfe; | |
430 | xfs_da_args_t nargs; | |
431 | char *tmpbuffer; | |
432 | int error, i, size; | |
433 | xfs_dablk_t blkno; | |
434 | xfs_dabuf_t *bp; | |
435 | xfs_ifork_t *ifp; | |
436 | ||
437 | dp = args->dp; | |
438 | ifp = dp->i_afp; | |
439 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; | |
3b244aa8 | 440 | size = be16_to_cpu(sf->hdr.totsize); |
1da177e4 LT |
441 | tmpbuffer = kmem_alloc(size, KM_SLEEP); |
442 | ASSERT(tmpbuffer != NULL); | |
443 | memcpy(tmpbuffer, ifp->if_u1.if_data, size); | |
444 | sf = (xfs_attr_shortform_t *)tmpbuffer; | |
445 | ||
446 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); | |
447 | bp = NULL; | |
448 | error = xfs_da_grow_inode(args, &blkno); | |
449 | if (error) { | |
450 | /* | |
451 | * If we hit an IO error middle of the transaction inside | |
452 | * grow_inode(), we may have inconsistent data. Bail out. | |
453 | */ | |
454 | if (error == EIO) | |
455 | goto out; | |
456 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
457 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
458 | goto out; | |
459 | } | |
460 | ||
461 | ASSERT(blkno == 0); | |
462 | error = xfs_attr_leaf_create(args, blkno, &bp); | |
463 | if (error) { | |
464 | error = xfs_da_shrink_inode(args, 0, bp); | |
465 | bp = NULL; | |
466 | if (error) | |
467 | goto out; | |
468 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ | |
469 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ | |
470 | goto out; | |
471 | } | |
472 | ||
473 | memset((char *)&nargs, 0, sizeof(nargs)); | |
474 | nargs.dp = dp; | |
475 | nargs.firstblock = args->firstblock; | |
476 | nargs.flist = args->flist; | |
477 | nargs.total = args->total; | |
478 | nargs.whichfork = XFS_ATTR_FORK; | |
479 | nargs.trans = args->trans; | |
480 | nargs.oknoent = 1; | |
481 | ||
482 | sfe = &sf->list[0]; | |
3b244aa8 | 483 | for (i = 0; i < sf->hdr.count; i++) { |
1da177e4 LT |
484 | nargs.name = (char *)sfe->nameval; |
485 | nargs.namelen = sfe->namelen; | |
486 | nargs.value = (char *)&sfe->nameval[nargs.namelen]; | |
3b244aa8 | 487 | nargs.valuelen = sfe->valuelen; |
1da177e4 LT |
488 | nargs.hashval = xfs_da_hashname((char *)sfe->nameval, |
489 | sfe->namelen); | |
490 | nargs.flags = (sfe->flags & XFS_ATTR_SECURE) ? ATTR_SECURE : | |
491 | ((sfe->flags & XFS_ATTR_ROOT) ? ATTR_ROOT : 0); | |
492 | error = xfs_attr_leaf_lookup_int(bp, &nargs); /* set a->index */ | |
493 | ASSERT(error == ENOATTR); | |
494 | error = xfs_attr_leaf_add(bp, &nargs); | |
495 | ASSERT(error != ENOSPC); | |
496 | if (error) | |
497 | goto out; | |
498 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
499 | } | |
500 | error = 0; | |
501 | ||
502 | out: | |
503 | if(bp) | |
504 | xfs_da_buf_done(bp); | |
505 | kmem_free(tmpbuffer, size); | |
506 | return(error); | |
507 | } | |
508 | ||
509 | STATIC int | |
510 | xfs_attr_shortform_compare(const void *a, const void *b) | |
511 | { | |
512 | xfs_attr_sf_sort_t *sa, *sb; | |
513 | ||
514 | sa = (xfs_attr_sf_sort_t *)a; | |
515 | sb = (xfs_attr_sf_sort_t *)b; | |
984a081a | 516 | if (sa->hash < sb->hash) { |
1da177e4 | 517 | return(-1); |
984a081a | 518 | } else if (sa->hash > sb->hash) { |
1da177e4 LT |
519 | return(1); |
520 | } else { | |
521 | return(sa->entno - sb->entno); | |
522 | } | |
523 | } | |
524 | ||
525 | /* | |
526 | * Copy out entries of shortform attribute lists for attr_list(). | |
c41564b5 | 527 | * Shortform attribute lists are not stored in hashval sorted order. |
1da177e4 LT |
528 | * If the output buffer is not large enough to hold them all, then we |
529 | * we have to calculate each entries' hashvalue and sort them before | |
530 | * we can begin returning them to the user. | |
531 | */ | |
532 | /*ARGSUSED*/ | |
533 | int | |
534 | xfs_attr_shortform_list(xfs_attr_list_context_t *context) | |
535 | { | |
536 | attrlist_cursor_kern_t *cursor; | |
537 | xfs_attr_sf_sort_t *sbuf, *sbp; | |
538 | xfs_attr_shortform_t *sf; | |
539 | xfs_attr_sf_entry_t *sfe; | |
540 | xfs_inode_t *dp; | |
541 | int sbsize, nsbuf, count, i; | |
542 | ||
543 | ASSERT(context != NULL); | |
544 | dp = context->dp; | |
545 | ASSERT(dp != NULL); | |
546 | ASSERT(dp->i_afp != NULL); | |
547 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; | |
548 | ASSERT(sf != NULL); | |
549 | if (!sf->hdr.count) | |
550 | return(0); | |
551 | cursor = context->cursor; | |
552 | ASSERT(cursor != NULL); | |
553 | ||
554 | xfs_attr_trace_l_c("sf start", context); | |
555 | ||
556 | /* | |
557 | * If the buffer is large enough, do not bother with sorting. | |
558 | * Note the generous fudge factor of 16 overhead bytes per entry. | |
559 | */ | |
3b244aa8 NS |
560 | if ((dp->i_afp->if_bytes + sf->hdr.count * 16) < context->bufsize) { |
561 | for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) { | |
1da177e4 LT |
562 | attrnames_t *namesp; |
563 | ||
564 | if (((context->flags & ATTR_SECURE) != 0) != | |
565 | ((sfe->flags & XFS_ATTR_SECURE) != 0) && | |
566 | !(context->flags & ATTR_KERNORMALS)) { | |
567 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
568 | continue; | |
569 | } | |
570 | if (((context->flags & ATTR_ROOT) != 0) != | |
571 | ((sfe->flags & XFS_ATTR_ROOT) != 0) && | |
572 | !(context->flags & ATTR_KERNROOTLS)) { | |
573 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
574 | continue; | |
575 | } | |
576 | namesp = (sfe->flags & XFS_ATTR_SECURE) ? &attr_secure: | |
577 | ((sfe->flags & XFS_ATTR_ROOT) ? &attr_trusted : | |
578 | &attr_user); | |
579 | if (context->flags & ATTR_KERNOVAL) { | |
580 | ASSERT(context->flags & ATTR_KERNAMELS); | |
581 | context->count += namesp->attr_namelen + | |
3b244aa8 | 582 | sfe->namelen + 1; |
1da177e4 LT |
583 | } |
584 | else { | |
585 | if (xfs_attr_put_listent(context, namesp, | |
586 | (char *)sfe->nameval, | |
587 | (int)sfe->namelen, | |
3b244aa8 | 588 | (int)sfe->valuelen)) |
1da177e4 LT |
589 | break; |
590 | } | |
591 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
592 | } | |
593 | xfs_attr_trace_l_c("sf big-gulp", context); | |
594 | return(0); | |
595 | } | |
596 | ||
597 | /* | |
598 | * It didn't all fit, so we have to sort everything on hashval. | |
599 | */ | |
3b244aa8 | 600 | sbsize = sf->hdr.count * sizeof(*sbuf); |
1da177e4 LT |
601 | sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP); |
602 | ||
603 | /* | |
604 | * Scan the attribute list for the rest of the entries, storing | |
605 | * the relevant info from only those that match into a buffer. | |
606 | */ | |
607 | nsbuf = 0; | |
3b244aa8 | 608 | for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) { |
1da177e4 LT |
609 | if (unlikely( |
610 | ((char *)sfe < (char *)sf) || | |
611 | ((char *)sfe >= ((char *)sf + dp->i_afp->if_bytes)))) { | |
612 | XFS_CORRUPTION_ERROR("xfs_attr_shortform_list", | |
613 | XFS_ERRLEVEL_LOW, | |
614 | context->dp->i_mount, sfe); | |
615 | xfs_attr_trace_l_c("sf corrupted", context); | |
616 | kmem_free(sbuf, sbsize); | |
617 | return XFS_ERROR(EFSCORRUPTED); | |
618 | } | |
619 | if (((context->flags & ATTR_SECURE) != 0) != | |
620 | ((sfe->flags & XFS_ATTR_SECURE) != 0) && | |
621 | !(context->flags & ATTR_KERNORMALS)) { | |
622 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
623 | continue; | |
624 | } | |
625 | if (((context->flags & ATTR_ROOT) != 0) != | |
626 | ((sfe->flags & XFS_ATTR_ROOT) != 0) && | |
627 | !(context->flags & ATTR_KERNROOTLS)) { | |
628 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
629 | continue; | |
630 | } | |
631 | sbp->entno = i; | |
984a081a | 632 | sbp->hash = xfs_da_hashname((char *)sfe->nameval, sfe->namelen); |
1da177e4 LT |
633 | sbp->name = (char *)sfe->nameval; |
634 | sbp->namelen = sfe->namelen; | |
635 | /* These are bytes, and both on-disk, don't endian-flip */ | |
636 | sbp->valuelen = sfe->valuelen; | |
637 | sbp->flags = sfe->flags; | |
638 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); | |
639 | sbp++; | |
640 | nsbuf++; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Sort the entries on hash then entno. | |
645 | */ | |
380b5dc0 | 646 | xfs_sort(sbuf, nsbuf, sizeof(*sbuf), xfs_attr_shortform_compare); |
1da177e4 LT |
647 | |
648 | /* | |
649 | * Re-find our place IN THE SORTED LIST. | |
650 | */ | |
651 | count = 0; | |
652 | cursor->initted = 1; | |
653 | cursor->blkno = 0; | |
654 | for (sbp = sbuf, i = 0; i < nsbuf; i++, sbp++) { | |
984a081a | 655 | if (sbp->hash == cursor->hashval) { |
1da177e4 LT |
656 | if (cursor->offset == count) { |
657 | break; | |
658 | } | |
659 | count++; | |
984a081a | 660 | } else if (sbp->hash > cursor->hashval) { |
1da177e4 LT |
661 | break; |
662 | } | |
663 | } | |
664 | if (i == nsbuf) { | |
665 | kmem_free(sbuf, sbsize); | |
666 | xfs_attr_trace_l_c("blk end", context); | |
667 | return(0); | |
668 | } | |
669 | ||
670 | /* | |
671 | * Loop putting entries into the user buffer. | |
672 | */ | |
673 | for ( ; i < nsbuf; i++, sbp++) { | |
674 | attrnames_t *namesp; | |
675 | ||
676 | namesp = (sbp->flags & XFS_ATTR_SECURE) ? &attr_secure : | |
677 | ((sbp->flags & XFS_ATTR_ROOT) ? &attr_trusted : | |
678 | &attr_user); | |
679 | ||
984a081a NS |
680 | if (cursor->hashval != sbp->hash) { |
681 | cursor->hashval = sbp->hash; | |
1da177e4 LT |
682 | cursor->offset = 0; |
683 | } | |
684 | if (context->flags & ATTR_KERNOVAL) { | |
685 | ASSERT(context->flags & ATTR_KERNAMELS); | |
686 | context->count += namesp->attr_namelen + | |
687 | sbp->namelen + 1; | |
688 | } else { | |
689 | if (xfs_attr_put_listent(context, namesp, | |
690 | sbp->name, sbp->namelen, | |
3b244aa8 | 691 | sbp->valuelen)) |
1da177e4 LT |
692 | break; |
693 | } | |
694 | cursor->offset++; | |
695 | } | |
696 | ||
697 | kmem_free(sbuf, sbsize); | |
698 | xfs_attr_trace_l_c("sf E-O-F", context); | |
699 | return(0); | |
700 | } | |
701 | ||
702 | /* | |
703 | * Check a leaf attribute block to see if all the entries would fit into | |
704 | * a shortform attribute list. | |
705 | */ | |
706 | int | |
707 | xfs_attr_shortform_allfit(xfs_dabuf_t *bp, xfs_inode_t *dp) | |
708 | { | |
709 | xfs_attr_leafblock_t *leaf; | |
710 | xfs_attr_leaf_entry_t *entry; | |
711 | xfs_attr_leaf_name_local_t *name_loc; | |
712 | int bytes, i; | |
713 | ||
714 | leaf = bp->data; | |
89da0544 | 715 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
716 | |
717 | entry = &leaf->entries[0]; | |
718 | bytes = sizeof(struct xfs_attr_sf_hdr); | |
918ae424 | 719 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
1da177e4 LT |
720 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
721 | continue; /* don't copy partial entries */ | |
722 | if (!(entry->flags & XFS_ATTR_LOCAL)) | |
723 | return(0); | |
724 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i); | |
725 | if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX) | |
726 | return(0); | |
053b5758 | 727 | if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX) |
1da177e4 LT |
728 | return(0); |
729 | bytes += sizeof(struct xfs_attr_sf_entry)-1 | |
730 | + name_loc->namelen | |
053b5758 | 731 | + be16_to_cpu(name_loc->valuelen); |
1da177e4 | 732 | } |
13059ff0 | 733 | if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) && |
e0144ca5 | 734 | (bytes == sizeof(struct xfs_attr_sf_hdr))) |
d8cc890d NS |
735 | return(-1); |
736 | return(xfs_attr_shortform_bytesfit(dp, bytes)); | |
1da177e4 LT |
737 | } |
738 | ||
739 | /* | |
740 | * Convert a leaf attribute list to shortform attribute list | |
741 | */ | |
742 | int | |
d8cc890d | 743 | xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff) |
1da177e4 LT |
744 | { |
745 | xfs_attr_leafblock_t *leaf; | |
746 | xfs_attr_leaf_entry_t *entry; | |
747 | xfs_attr_leaf_name_local_t *name_loc; | |
748 | xfs_da_args_t nargs; | |
749 | xfs_inode_t *dp; | |
750 | char *tmpbuffer; | |
751 | int error, i; | |
752 | ||
753 | dp = args->dp; | |
754 | tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP); | |
755 | ASSERT(tmpbuffer != NULL); | |
756 | ||
757 | ASSERT(bp != NULL); | |
758 | memcpy(tmpbuffer, bp->data, XFS_LBSIZE(dp->i_mount)); | |
759 | leaf = (xfs_attr_leafblock_t *)tmpbuffer; | |
89da0544 | 760 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
761 | memset(bp->data, 0, XFS_LBSIZE(dp->i_mount)); |
762 | ||
763 | /* | |
764 | * Clean out the prior contents of the attribute list. | |
765 | */ | |
766 | error = xfs_da_shrink_inode(args, 0, bp); | |
767 | if (error) | |
768 | goto out; | |
d8cc890d NS |
769 | |
770 | if (forkoff == -1) { | |
13059ff0 | 771 | ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2); |
e0144ca5 | 772 | |
d8cc890d NS |
773 | /* |
774 | * Last attribute was removed, revert to original | |
775 | * inode format making all literal area available | |
776 | * to the data fork once more. | |
777 | */ | |
778 | xfs_idestroy_fork(dp, XFS_ATTR_FORK); | |
779 | dp->i_d.di_forkoff = 0; | |
780 | dp->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
781 | ASSERT(dp->i_d.di_anextents == 0); | |
782 | ASSERT(dp->i_afp == NULL); | |
783 | dp->i_df.if_ext_max = | |
784 | XFS_IFORK_DSIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t); | |
785 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); | |
1da177e4 | 786 | goto out; |
d8cc890d NS |
787 | } |
788 | ||
789 | xfs_attr_shortform_create(args); | |
1da177e4 LT |
790 | |
791 | /* | |
792 | * Copy the attributes | |
793 | */ | |
794 | memset((char *)&nargs, 0, sizeof(nargs)); | |
795 | nargs.dp = dp; | |
796 | nargs.firstblock = args->firstblock; | |
797 | nargs.flist = args->flist; | |
798 | nargs.total = args->total; | |
799 | nargs.whichfork = XFS_ATTR_FORK; | |
800 | nargs.trans = args->trans; | |
801 | nargs.oknoent = 1; | |
802 | entry = &leaf->entries[0]; | |
918ae424 | 803 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
1da177e4 LT |
804 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
805 | continue; /* don't copy partial entries */ | |
806 | if (!entry->nameidx) | |
807 | continue; | |
808 | ASSERT(entry->flags & XFS_ATTR_LOCAL); | |
809 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i); | |
810 | nargs.name = (char *)name_loc->nameval; | |
811 | nargs.namelen = name_loc->namelen; | |
812 | nargs.value = (char *)&name_loc->nameval[nargs.namelen]; | |
053b5758 | 813 | nargs.valuelen = be16_to_cpu(name_loc->valuelen); |
6b19f2d8 | 814 | nargs.hashval = be32_to_cpu(entry->hashval); |
1da177e4 LT |
815 | nargs.flags = (entry->flags & XFS_ATTR_SECURE) ? ATTR_SECURE : |
816 | ((entry->flags & XFS_ATTR_ROOT) ? ATTR_ROOT : 0); | |
d8cc890d | 817 | xfs_attr_shortform_add(&nargs, forkoff); |
1da177e4 LT |
818 | } |
819 | error = 0; | |
820 | ||
821 | out: | |
822 | kmem_free(tmpbuffer, XFS_LBSIZE(dp->i_mount)); | |
823 | return(error); | |
824 | } | |
825 | ||
826 | /* | |
827 | * Convert from using a single leaf to a root node and a leaf. | |
828 | */ | |
829 | int | |
830 | xfs_attr_leaf_to_node(xfs_da_args_t *args) | |
831 | { | |
832 | xfs_attr_leafblock_t *leaf; | |
833 | xfs_da_intnode_t *node; | |
834 | xfs_inode_t *dp; | |
835 | xfs_dabuf_t *bp1, *bp2; | |
836 | xfs_dablk_t blkno; | |
837 | int error; | |
838 | ||
839 | dp = args->dp; | |
840 | bp1 = bp2 = NULL; | |
841 | error = xfs_da_grow_inode(args, &blkno); | |
842 | if (error) | |
843 | goto out; | |
844 | error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp1, | |
845 | XFS_ATTR_FORK); | |
846 | if (error) | |
847 | goto out; | |
848 | ASSERT(bp1 != NULL); | |
849 | bp2 = NULL; | |
850 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp2, | |
851 | XFS_ATTR_FORK); | |
852 | if (error) | |
853 | goto out; | |
854 | ASSERT(bp2 != NULL); | |
855 | memcpy(bp2->data, bp1->data, XFS_LBSIZE(dp->i_mount)); | |
856 | xfs_da_buf_done(bp1); | |
857 | bp1 = NULL; | |
858 | xfs_da_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1); | |
859 | ||
860 | /* | |
861 | * Set up the new root node. | |
862 | */ | |
863 | error = xfs_da_node_create(args, 0, 1, &bp1, XFS_ATTR_FORK); | |
864 | if (error) | |
865 | goto out; | |
866 | node = bp1->data; | |
867 | leaf = bp2->data; | |
89da0544 | 868 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
869 | /* both on-disk, don't endian-flip twice */ |
870 | node->btree[0].hashval = | |
918ae424 | 871 | leaf->entries[be16_to_cpu(leaf->hdr.count)-1 ].hashval; |
403432dc | 872 | node->btree[0].before = cpu_to_be32(blkno); |
fac80cce | 873 | node->hdr.count = cpu_to_be16(1); |
1da177e4 LT |
874 | xfs_da_log_buf(args->trans, bp1, 0, XFS_LBSIZE(dp->i_mount) - 1); |
875 | error = 0; | |
876 | out: | |
877 | if (bp1) | |
878 | xfs_da_buf_done(bp1); | |
879 | if (bp2) | |
880 | xfs_da_buf_done(bp2); | |
881 | return(error); | |
882 | } | |
883 | ||
884 | ||
885 | /*======================================================================== | |
886 | * Routines used for growing the Btree. | |
887 | *========================================================================*/ | |
888 | ||
889 | /* | |
890 | * Create the initial contents of a leaf attribute list | |
891 | * or a leaf in a node attribute list. | |
892 | */ | |
ba0f32d4 | 893 | STATIC int |
1da177e4 LT |
894 | xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t blkno, xfs_dabuf_t **bpp) |
895 | { | |
896 | xfs_attr_leafblock_t *leaf; | |
897 | xfs_attr_leaf_hdr_t *hdr; | |
898 | xfs_inode_t *dp; | |
899 | xfs_dabuf_t *bp; | |
900 | int error; | |
901 | ||
902 | dp = args->dp; | |
903 | ASSERT(dp != NULL); | |
904 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp, | |
905 | XFS_ATTR_FORK); | |
906 | if (error) | |
907 | return(error); | |
908 | ASSERT(bp != NULL); | |
909 | leaf = bp->data; | |
910 | memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount)); | |
911 | hdr = &leaf->hdr; | |
89da0544 | 912 | hdr->info.magic = cpu_to_be16(XFS_ATTR_LEAF_MAGIC); |
918ae424 | 913 | hdr->firstused = cpu_to_be16(XFS_LBSIZE(dp->i_mount)); |
1da177e4 | 914 | if (!hdr->firstused) { |
918ae424 | 915 | hdr->firstused = cpu_to_be16( |
1da177e4 LT |
916 | XFS_LBSIZE(dp->i_mount) - XFS_ATTR_LEAF_NAME_ALIGN); |
917 | } | |
918 | ||
918ae424 NS |
919 | hdr->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t)); |
920 | hdr->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr->firstused) - | |
921 | sizeof(xfs_attr_leaf_hdr_t)); | |
1da177e4 LT |
922 | |
923 | xfs_da_log_buf(args->trans, bp, 0, XFS_LBSIZE(dp->i_mount) - 1); | |
924 | ||
925 | *bpp = bp; | |
926 | return(0); | |
927 | } | |
928 | ||
929 | /* | |
930 | * Split the leaf node, rebalance, then add the new entry. | |
931 | */ | |
932 | int | |
933 | xfs_attr_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk, | |
934 | xfs_da_state_blk_t *newblk) | |
935 | { | |
936 | xfs_dablk_t blkno; | |
937 | int error; | |
938 | ||
939 | /* | |
940 | * Allocate space for a new leaf node. | |
941 | */ | |
942 | ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC); | |
943 | error = xfs_da_grow_inode(state->args, &blkno); | |
944 | if (error) | |
945 | return(error); | |
946 | error = xfs_attr_leaf_create(state->args, blkno, &newblk->bp); | |
947 | if (error) | |
948 | return(error); | |
949 | newblk->blkno = blkno; | |
950 | newblk->magic = XFS_ATTR_LEAF_MAGIC; | |
951 | ||
952 | /* | |
953 | * Rebalance the entries across the two leaves. | |
954 | * NOTE: rebalance() currently depends on the 2nd block being empty. | |
955 | */ | |
956 | xfs_attr_leaf_rebalance(state, oldblk, newblk); | |
957 | error = xfs_da_blk_link(state, oldblk, newblk); | |
958 | if (error) | |
959 | return(error); | |
960 | ||
961 | /* | |
962 | * Save info on "old" attribute for "atomic rename" ops, leaf_add() | |
963 | * modifies the index/blkno/rmtblk/rmtblkcnt fields to show the | |
964 | * "new" attrs info. Will need the "old" info to remove it later. | |
965 | * | |
966 | * Insert the "new" entry in the correct block. | |
967 | */ | |
968 | if (state->inleaf) | |
969 | error = xfs_attr_leaf_add(oldblk->bp, state->args); | |
970 | else | |
971 | error = xfs_attr_leaf_add(newblk->bp, state->args); | |
972 | ||
973 | /* | |
974 | * Update last hashval in each block since we added the name. | |
975 | */ | |
976 | oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL); | |
977 | newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL); | |
978 | return(error); | |
979 | } | |
980 | ||
981 | /* | |
982 | * Add a name to the leaf attribute list structure. | |
983 | */ | |
984 | int | |
985 | xfs_attr_leaf_add(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
986 | { | |
987 | xfs_attr_leafblock_t *leaf; | |
988 | xfs_attr_leaf_hdr_t *hdr; | |
989 | xfs_attr_leaf_map_t *map; | |
990 | int tablesize, entsize, sum, tmp, i; | |
991 | ||
992 | leaf = bp->data; | |
89da0544 | 993 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 | 994 | ASSERT((args->index >= 0) |
918ae424 | 995 | && (args->index <= be16_to_cpu(leaf->hdr.count))); |
1da177e4 | 996 | hdr = &leaf->hdr; |
aa82daa0 | 997 | entsize = xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1da177e4 LT |
998 | args->trans->t_mountp->m_sb.sb_blocksize, NULL); |
999 | ||
1000 | /* | |
1001 | * Search through freemap for first-fit on new name length. | |
1002 | * (may need to figure in size of entry struct too) | |
1003 | */ | |
918ae424 | 1004 | tablesize = (be16_to_cpu(hdr->count) + 1) |
1da177e4 LT |
1005 | * sizeof(xfs_attr_leaf_entry_t) |
1006 | + sizeof(xfs_attr_leaf_hdr_t); | |
1007 | map = &hdr->freemap[XFS_ATTR_LEAF_MAPSIZE-1]; | |
1008 | for (sum = 0, i = XFS_ATTR_LEAF_MAPSIZE-1; i >= 0; map--, i--) { | |
918ae424 NS |
1009 | if (tablesize > be16_to_cpu(hdr->firstused)) { |
1010 | sum += be16_to_cpu(map->size); | |
1da177e4 LT |
1011 | continue; |
1012 | } | |
1013 | if (!map->size) | |
1014 | continue; /* no space in this map */ | |
1015 | tmp = entsize; | |
918ae424 | 1016 | if (be16_to_cpu(map->base) < be16_to_cpu(hdr->firstused)) |
1da177e4 | 1017 | tmp += sizeof(xfs_attr_leaf_entry_t); |
918ae424 | 1018 | if (be16_to_cpu(map->size) >= tmp) { |
1da177e4 LT |
1019 | tmp = xfs_attr_leaf_add_work(bp, args, i); |
1020 | return(tmp); | |
1021 | } | |
918ae424 | 1022 | sum += be16_to_cpu(map->size); |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | /* | |
1026 | * If there are no holes in the address space of the block, | |
1027 | * and we don't have enough freespace, then compaction will do us | |
1028 | * no good and we should just give up. | |
1029 | */ | |
1030 | if (!hdr->holes && (sum < entsize)) | |
1031 | return(XFS_ERROR(ENOSPC)); | |
1032 | ||
1033 | /* | |
1034 | * Compact the entries to coalesce free space. | |
1035 | * This may change the hdr->count via dropping INCOMPLETE entries. | |
1036 | */ | |
1037 | xfs_attr_leaf_compact(args->trans, bp); | |
1038 | ||
1039 | /* | |
1040 | * After compaction, the block is guaranteed to have only one | |
1041 | * free region, in freemap[0]. If it is not big enough, give up. | |
1042 | */ | |
918ae424 | 1043 | if (be16_to_cpu(hdr->freemap[0].size) |
1da177e4 LT |
1044 | < (entsize + sizeof(xfs_attr_leaf_entry_t))) |
1045 | return(XFS_ERROR(ENOSPC)); | |
1046 | ||
1047 | return(xfs_attr_leaf_add_work(bp, args, 0)); | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * Add a name to a leaf attribute list structure. | |
1052 | */ | |
1053 | STATIC int | |
1054 | xfs_attr_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int mapindex) | |
1055 | { | |
1056 | xfs_attr_leafblock_t *leaf; | |
1057 | xfs_attr_leaf_hdr_t *hdr; | |
1058 | xfs_attr_leaf_entry_t *entry; | |
1059 | xfs_attr_leaf_name_local_t *name_loc; | |
1060 | xfs_attr_leaf_name_remote_t *name_rmt; | |
1061 | xfs_attr_leaf_map_t *map; | |
1062 | xfs_mount_t *mp; | |
1063 | int tmp, i; | |
1064 | ||
1065 | leaf = bp->data; | |
89da0544 | 1066 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
1067 | hdr = &leaf->hdr; |
1068 | ASSERT((mapindex >= 0) && (mapindex < XFS_ATTR_LEAF_MAPSIZE)); | |
918ae424 | 1069 | ASSERT((args->index >= 0) && (args->index <= be16_to_cpu(hdr->count))); |
1da177e4 LT |
1070 | |
1071 | /* | |
1072 | * Force open some space in the entry array and fill it in. | |
1073 | */ | |
1074 | entry = &leaf->entries[args->index]; | |
918ae424 NS |
1075 | if (args->index < be16_to_cpu(hdr->count)) { |
1076 | tmp = be16_to_cpu(hdr->count) - args->index; | |
1da177e4 LT |
1077 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
1078 | memmove((char *)(entry+1), (char *)entry, tmp); | |
1079 | xfs_da_log_buf(args->trans, bp, | |
1080 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); | |
1081 | } | |
918ae424 | 1082 | be16_add(&hdr->count, 1); |
1da177e4 LT |
1083 | |
1084 | /* | |
1085 | * Allocate space for the new string (at the end of the run). | |
1086 | */ | |
1087 | map = &hdr->freemap[mapindex]; | |
1088 | mp = args->trans->t_mountp; | |
918ae424 NS |
1089 | ASSERT(be16_to_cpu(map->base) < XFS_LBSIZE(mp)); |
1090 | ASSERT((be16_to_cpu(map->base) & 0x3) == 0); | |
1091 | ASSERT(be16_to_cpu(map->size) >= | |
aa82daa0 NS |
1092 | xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1093 | mp->m_sb.sb_blocksize, NULL)); | |
918ae424 NS |
1094 | ASSERT(be16_to_cpu(map->size) < XFS_LBSIZE(mp)); |
1095 | ASSERT((be16_to_cpu(map->size) & 0x3) == 0); | |
1096 | be16_add(&map->size, | |
aa82daa0 NS |
1097 | -xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
1098 | mp->m_sb.sb_blocksize, &tmp)); | |
6b19f2d8 NS |
1099 | entry->nameidx = cpu_to_be16(be16_to_cpu(map->base) + |
1100 | be16_to_cpu(map->size)); | |
1101 | entry->hashval = cpu_to_be32(args->hashval); | |
1da177e4 LT |
1102 | entry->flags = tmp ? XFS_ATTR_LOCAL : 0; |
1103 | entry->flags |= (args->flags & ATTR_SECURE) ? XFS_ATTR_SECURE : | |
1104 | ((args->flags & ATTR_ROOT) ? XFS_ATTR_ROOT : 0); | |
1105 | if (args->rename) { | |
1106 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
1107 | if ((args->blkno2 == args->blkno) && | |
1108 | (args->index2 <= args->index)) { | |
1109 | args->index2++; | |
1110 | } | |
1111 | } | |
1112 | xfs_da_log_buf(args->trans, bp, | |
1113 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); | |
6b19f2d8 NS |
1114 | ASSERT((args->index == 0) || |
1115 | (be32_to_cpu(entry->hashval) >= be32_to_cpu((entry-1)->hashval))); | |
918ae424 | 1116 | ASSERT((args->index == be16_to_cpu(hdr->count)-1) || |
6b19f2d8 | 1117 | (be32_to_cpu(entry->hashval) <= be32_to_cpu((entry+1)->hashval))); |
1da177e4 LT |
1118 | |
1119 | /* | |
1120 | * Copy the attribute name and value into the new space. | |
1121 | * | |
1122 | * For "remote" attribute values, simply note that we need to | |
1123 | * allocate space for the "remote" value. We can't actually | |
1124 | * allocate the extents in this transaction, and we can't decide | |
1125 | * which blocks they should be as we might allocate more blocks | |
1126 | * as part of this transaction (a split operation for example). | |
1127 | */ | |
1128 | if (entry->flags & XFS_ATTR_LOCAL) { | |
1129 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index); | |
1130 | name_loc->namelen = args->namelen; | |
053b5758 | 1131 | name_loc->valuelen = cpu_to_be16(args->valuelen); |
1da177e4 LT |
1132 | memcpy((char *)name_loc->nameval, args->name, args->namelen); |
1133 | memcpy((char *)&name_loc->nameval[args->namelen], args->value, | |
053b5758 | 1134 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 LT |
1135 | } else { |
1136 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index); | |
1137 | name_rmt->namelen = args->namelen; | |
1138 | memcpy((char *)name_rmt->name, args->name, args->namelen); | |
1139 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
1140 | /* just in case */ | |
1141 | name_rmt->valuelen = 0; | |
1142 | name_rmt->valueblk = 0; | |
1143 | args->rmtblkno = 1; | |
1144 | args->rmtblkcnt = XFS_B_TO_FSB(mp, args->valuelen); | |
1145 | } | |
1146 | xfs_da_log_buf(args->trans, bp, | |
1147 | XFS_DA_LOGRANGE(leaf, XFS_ATTR_LEAF_NAME(leaf, args->index), | |
1148 | xfs_attr_leaf_entsize(leaf, args->index))); | |
1149 | ||
1150 | /* | |
1151 | * Update the control info for this leaf node | |
1152 | */ | |
6b19f2d8 | 1153 | if (be16_to_cpu(entry->nameidx) < be16_to_cpu(hdr->firstused)) { |
1da177e4 LT |
1154 | /* both on-disk, don't endian-flip twice */ |
1155 | hdr->firstused = entry->nameidx; | |
1156 | } | |
918ae424 NS |
1157 | ASSERT(be16_to_cpu(hdr->firstused) >= |
1158 | ((be16_to_cpu(hdr->count) * sizeof(*entry)) + sizeof(*hdr))); | |
1159 | tmp = (be16_to_cpu(hdr->count)-1) * sizeof(xfs_attr_leaf_entry_t) | |
1da177e4 LT |
1160 | + sizeof(xfs_attr_leaf_hdr_t); |
1161 | map = &hdr->freemap[0]; | |
1162 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; map++, i++) { | |
918ae424 NS |
1163 | if (be16_to_cpu(map->base) == tmp) { |
1164 | be16_add(&map->base, sizeof(xfs_attr_leaf_entry_t)); | |
1165 | be16_add(&map->size, | |
1166 | -((int)sizeof(xfs_attr_leaf_entry_t))); | |
1da177e4 LT |
1167 | } |
1168 | } | |
918ae424 | 1169 | be16_add(&hdr->usedbytes, xfs_attr_leaf_entsize(leaf, args->index)); |
1da177e4 LT |
1170 | xfs_da_log_buf(args->trans, bp, |
1171 | XFS_DA_LOGRANGE(leaf, hdr, sizeof(*hdr))); | |
1172 | return(0); | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * Garbage collect a leaf attribute list block by copying it to a new buffer. | |
1177 | */ | |
1178 | STATIC void | |
1179 | xfs_attr_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *bp) | |
1180 | { | |
1181 | xfs_attr_leafblock_t *leaf_s, *leaf_d; | |
1182 | xfs_attr_leaf_hdr_t *hdr_s, *hdr_d; | |
1183 | xfs_mount_t *mp; | |
1184 | char *tmpbuffer; | |
1185 | ||
1186 | mp = trans->t_mountp; | |
1187 | tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP); | |
1188 | ASSERT(tmpbuffer != NULL); | |
1189 | memcpy(tmpbuffer, bp->data, XFS_LBSIZE(mp)); | |
1190 | memset(bp->data, 0, XFS_LBSIZE(mp)); | |
1191 | ||
1192 | /* | |
1193 | * Copy basic information | |
1194 | */ | |
1195 | leaf_s = (xfs_attr_leafblock_t *)tmpbuffer; | |
1196 | leaf_d = bp->data; | |
1197 | hdr_s = &leaf_s->hdr; | |
1198 | hdr_d = &leaf_d->hdr; | |
1199 | hdr_d->info = hdr_s->info; /* struct copy */ | |
918ae424 | 1200 | hdr_d->firstused = cpu_to_be16(XFS_LBSIZE(mp)); |
1da177e4 LT |
1201 | /* handle truncation gracefully */ |
1202 | if (!hdr_d->firstused) { | |
918ae424 | 1203 | hdr_d->firstused = cpu_to_be16( |
1da177e4 LT |
1204 | XFS_LBSIZE(mp) - XFS_ATTR_LEAF_NAME_ALIGN); |
1205 | } | |
1206 | hdr_d->usedbytes = 0; | |
1207 | hdr_d->count = 0; | |
1208 | hdr_d->holes = 0; | |
918ae424 NS |
1209 | hdr_d->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t)); |
1210 | hdr_d->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr_d->firstused) - | |
1211 | sizeof(xfs_attr_leaf_hdr_t)); | |
1da177e4 LT |
1212 | |
1213 | /* | |
1214 | * Copy all entry's in the same (sorted) order, | |
1215 | * but allocate name/value pairs packed and in sequence. | |
1216 | */ | |
1217 | xfs_attr_leaf_moveents(leaf_s, 0, leaf_d, 0, | |
918ae424 | 1218 | be16_to_cpu(hdr_s->count), mp); |
1da177e4 LT |
1219 | xfs_da_log_buf(trans, bp, 0, XFS_LBSIZE(mp) - 1); |
1220 | ||
1221 | kmem_free(tmpbuffer, XFS_LBSIZE(mp)); | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Redistribute the attribute list entries between two leaf nodes, | |
1226 | * taking into account the size of the new entry. | |
1227 | * | |
1228 | * NOTE: if new block is empty, then it will get the upper half of the | |
1229 | * old block. At present, all (one) callers pass in an empty second block. | |
1230 | * | |
1231 | * This code adjusts the args->index/blkno and args->index2/blkno2 fields | |
1232 | * to match what it is doing in splitting the attribute leaf block. Those | |
1233 | * values are used in "atomic rename" operations on attributes. Note that | |
1234 | * the "new" and "old" values can end up in different blocks. | |
1235 | */ | |
1236 | STATIC void | |
1237 | xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, | |
1238 | xfs_da_state_blk_t *blk2) | |
1239 | { | |
1240 | xfs_da_args_t *args; | |
1241 | xfs_da_state_blk_t *tmp_blk; | |
1242 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
1243 | xfs_attr_leaf_hdr_t *hdr1, *hdr2; | |
1244 | int count, totallen, max, space, swap; | |
1245 | ||
1246 | /* | |
1247 | * Set up environment. | |
1248 | */ | |
1249 | ASSERT(blk1->magic == XFS_ATTR_LEAF_MAGIC); | |
1250 | ASSERT(blk2->magic == XFS_ATTR_LEAF_MAGIC); | |
1251 | leaf1 = blk1->bp->data; | |
1252 | leaf2 = blk2->bp->data; | |
89da0544 NS |
1253 | ASSERT(be16_to_cpu(leaf1->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1254 | ASSERT(be16_to_cpu(leaf2->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); | |
1da177e4 LT |
1255 | args = state->args; |
1256 | ||
1257 | /* | |
1258 | * Check ordering of blocks, reverse if it makes things simpler. | |
1259 | * | |
1260 | * NOTE: Given that all (current) callers pass in an empty | |
1261 | * second block, this code should never set "swap". | |
1262 | */ | |
1263 | swap = 0; | |
1264 | if (xfs_attr_leaf_order(blk1->bp, blk2->bp)) { | |
1265 | tmp_blk = blk1; | |
1266 | blk1 = blk2; | |
1267 | blk2 = tmp_blk; | |
1268 | leaf1 = blk1->bp->data; | |
1269 | leaf2 = blk2->bp->data; | |
1270 | swap = 1; | |
1271 | } | |
1272 | hdr1 = &leaf1->hdr; | |
1273 | hdr2 = &leaf2->hdr; | |
1274 | ||
1275 | /* | |
1276 | * Examine entries until we reduce the absolute difference in | |
1277 | * byte usage between the two blocks to a minimum. Then get | |
1278 | * the direction to copy and the number of elements to move. | |
1279 | * | |
1280 | * "inleaf" is true if the new entry should be inserted into blk1. | |
1281 | * If "swap" is also true, then reverse the sense of "inleaf". | |
1282 | */ | |
1283 | state->inleaf = xfs_attr_leaf_figure_balance(state, blk1, blk2, | |
1284 | &count, &totallen); | |
1285 | if (swap) | |
1286 | state->inleaf = !state->inleaf; | |
1287 | ||
1288 | /* | |
1289 | * Move any entries required from leaf to leaf: | |
1290 | */ | |
918ae424 | 1291 | if (count < be16_to_cpu(hdr1->count)) { |
1da177e4 LT |
1292 | /* |
1293 | * Figure the total bytes to be added to the destination leaf. | |
1294 | */ | |
1295 | /* number entries being moved */ | |
918ae424 NS |
1296 | count = be16_to_cpu(hdr1->count) - count; |
1297 | space = be16_to_cpu(hdr1->usedbytes) - totallen; | |
1da177e4 LT |
1298 | space += count * sizeof(xfs_attr_leaf_entry_t); |
1299 | ||
1300 | /* | |
1301 | * leaf2 is the destination, compact it if it looks tight. | |
1302 | */ | |
918ae424 | 1303 | max = be16_to_cpu(hdr2->firstused) |
1da177e4 | 1304 | - sizeof(xfs_attr_leaf_hdr_t); |
918ae424 | 1305 | max -= be16_to_cpu(hdr2->count) * sizeof(xfs_attr_leaf_entry_t); |
1da177e4 LT |
1306 | if (space > max) { |
1307 | xfs_attr_leaf_compact(args->trans, blk2->bp); | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * Move high entries from leaf1 to low end of leaf2. | |
1312 | */ | |
918ae424 | 1313 | xfs_attr_leaf_moveents(leaf1, be16_to_cpu(hdr1->count) - count, |
1da177e4 LT |
1314 | leaf2, 0, count, state->mp); |
1315 | ||
1316 | xfs_da_log_buf(args->trans, blk1->bp, 0, state->blocksize-1); | |
1317 | xfs_da_log_buf(args->trans, blk2->bp, 0, state->blocksize-1); | |
918ae424 | 1318 | } else if (count > be16_to_cpu(hdr1->count)) { |
1da177e4 LT |
1319 | /* |
1320 | * I assert that since all callers pass in an empty | |
1321 | * second buffer, this code should never execute. | |
1322 | */ | |
1323 | ||
1324 | /* | |
1325 | * Figure the total bytes to be added to the destination leaf. | |
1326 | */ | |
1327 | /* number entries being moved */ | |
918ae424 NS |
1328 | count -= be16_to_cpu(hdr1->count); |
1329 | space = totallen - be16_to_cpu(hdr1->usedbytes); | |
1da177e4 LT |
1330 | space += count * sizeof(xfs_attr_leaf_entry_t); |
1331 | ||
1332 | /* | |
1333 | * leaf1 is the destination, compact it if it looks tight. | |
1334 | */ | |
918ae424 | 1335 | max = be16_to_cpu(hdr1->firstused) |
1da177e4 | 1336 | - sizeof(xfs_attr_leaf_hdr_t); |
918ae424 | 1337 | max -= be16_to_cpu(hdr1->count) * sizeof(xfs_attr_leaf_entry_t); |
1da177e4 LT |
1338 | if (space > max) { |
1339 | xfs_attr_leaf_compact(args->trans, blk1->bp); | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | * Move low entries from leaf2 to high end of leaf1. | |
1344 | */ | |
1345 | xfs_attr_leaf_moveents(leaf2, 0, leaf1, | |
918ae424 | 1346 | be16_to_cpu(hdr1->count), count, state->mp); |
1da177e4 LT |
1347 | |
1348 | xfs_da_log_buf(args->trans, blk1->bp, 0, state->blocksize-1); | |
1349 | xfs_da_log_buf(args->trans, blk2->bp, 0, state->blocksize-1); | |
1350 | } | |
1351 | ||
1352 | /* | |
1353 | * Copy out last hashval in each block for B-tree code. | |
1354 | */ | |
6b19f2d8 NS |
1355 | blk1->hashval = be32_to_cpu( |
1356 | leaf1->entries[be16_to_cpu(leaf1->hdr.count)-1].hashval); | |
1357 | blk2->hashval = be32_to_cpu( | |
1358 | leaf2->entries[be16_to_cpu(leaf2->hdr.count)-1].hashval); | |
1da177e4 LT |
1359 | |
1360 | /* | |
1361 | * Adjust the expected index for insertion. | |
1362 | * NOTE: this code depends on the (current) situation that the | |
1363 | * second block was originally empty. | |
1364 | * | |
1365 | * If the insertion point moved to the 2nd block, we must adjust | |
1366 | * the index. We must also track the entry just following the | |
1367 | * new entry for use in an "atomic rename" operation, that entry | |
1368 | * is always the "old" entry and the "new" entry is what we are | |
1369 | * inserting. The index/blkno fields refer to the "old" entry, | |
1370 | * while the index2/blkno2 fields refer to the "new" entry. | |
1371 | */ | |
918ae424 | 1372 | if (blk1->index > be16_to_cpu(leaf1->hdr.count)) { |
1da177e4 | 1373 | ASSERT(state->inleaf == 0); |
918ae424 | 1374 | blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count); |
1da177e4 LT |
1375 | args->index = args->index2 = blk2->index; |
1376 | args->blkno = args->blkno2 = blk2->blkno; | |
918ae424 | 1377 | } else if (blk1->index == be16_to_cpu(leaf1->hdr.count)) { |
1da177e4 LT |
1378 | if (state->inleaf) { |
1379 | args->index = blk1->index; | |
1380 | args->blkno = blk1->blkno; | |
1381 | args->index2 = 0; | |
1382 | args->blkno2 = blk2->blkno; | |
1383 | } else { | |
1384 | blk2->index = blk1->index | |
918ae424 | 1385 | - be16_to_cpu(leaf1->hdr.count); |
1da177e4 LT |
1386 | args->index = args->index2 = blk2->index; |
1387 | args->blkno = args->blkno2 = blk2->blkno; | |
1388 | } | |
1389 | } else { | |
1390 | ASSERT(state->inleaf == 1); | |
1391 | args->index = args->index2 = blk1->index; | |
1392 | args->blkno = args->blkno2 = blk1->blkno; | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * Examine entries until we reduce the absolute difference in | |
1398 | * byte usage between the two blocks to a minimum. | |
1399 | * GROT: Is this really necessary? With other than a 512 byte blocksize, | |
1400 | * GROT: there will always be enough room in either block for a new entry. | |
1401 | * GROT: Do a double-split for this case? | |
1402 | */ | |
1403 | STATIC int | |
1404 | xfs_attr_leaf_figure_balance(xfs_da_state_t *state, | |
1405 | xfs_da_state_blk_t *blk1, | |
1406 | xfs_da_state_blk_t *blk2, | |
1407 | int *countarg, int *usedbytesarg) | |
1408 | { | |
1409 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
1410 | xfs_attr_leaf_hdr_t *hdr1, *hdr2; | |
1411 | xfs_attr_leaf_entry_t *entry; | |
1412 | int count, max, index, totallen, half; | |
1413 | int lastdelta, foundit, tmp; | |
1414 | ||
1415 | /* | |
1416 | * Set up environment. | |
1417 | */ | |
1418 | leaf1 = blk1->bp->data; | |
1419 | leaf2 = blk2->bp->data; | |
1420 | hdr1 = &leaf1->hdr; | |
1421 | hdr2 = &leaf2->hdr; | |
1422 | foundit = 0; | |
1423 | totallen = 0; | |
1424 | ||
1425 | /* | |
1426 | * Examine entries until we reduce the absolute difference in | |
1427 | * byte usage between the two blocks to a minimum. | |
1428 | */ | |
918ae424 | 1429 | max = be16_to_cpu(hdr1->count) + be16_to_cpu(hdr2->count); |
1da177e4 | 1430 | half = (max+1) * sizeof(*entry); |
918ae424 NS |
1431 | half += be16_to_cpu(hdr1->usedbytes) + |
1432 | be16_to_cpu(hdr2->usedbytes) + | |
1433 | xfs_attr_leaf_newentsize( | |
1434 | state->args->namelen, | |
1435 | state->args->valuelen, | |
1436 | state->blocksize, NULL); | |
1da177e4 LT |
1437 | half /= 2; |
1438 | lastdelta = state->blocksize; | |
1439 | entry = &leaf1->entries[0]; | |
1440 | for (count = index = 0; count < max; entry++, index++, count++) { | |
1441 | ||
1442 | #define XFS_ATTR_ABS(A) (((A) < 0) ? -(A) : (A)) | |
1443 | /* | |
1444 | * The new entry is in the first block, account for it. | |
1445 | */ | |
1446 | if (count == blk1->index) { | |
1447 | tmp = totallen + sizeof(*entry) + | |
aa82daa0 NS |
1448 | xfs_attr_leaf_newentsize( |
1449 | state->args->namelen, | |
1450 | state->args->valuelen, | |
1451 | state->blocksize, NULL); | |
1da177e4 LT |
1452 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) |
1453 | break; | |
1454 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1455 | totallen = tmp; | |
1456 | foundit = 1; | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Wrap around into the second block if necessary. | |
1461 | */ | |
918ae424 | 1462 | if (count == be16_to_cpu(hdr1->count)) { |
1da177e4 LT |
1463 | leaf1 = leaf2; |
1464 | entry = &leaf1->entries[0]; | |
1465 | index = 0; | |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * Figure out if next leaf entry would be too much. | |
1470 | */ | |
1471 | tmp = totallen + sizeof(*entry) + xfs_attr_leaf_entsize(leaf1, | |
1472 | index); | |
1473 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) | |
1474 | break; | |
1475 | lastdelta = XFS_ATTR_ABS(half - tmp); | |
1476 | totallen = tmp; | |
1477 | #undef XFS_ATTR_ABS | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * Calculate the number of usedbytes that will end up in lower block. | |
1482 | * If new entry not in lower block, fix up the count. | |
1483 | */ | |
1484 | totallen -= count * sizeof(*entry); | |
1485 | if (foundit) { | |
1486 | totallen -= sizeof(*entry) + | |
aa82daa0 NS |
1487 | xfs_attr_leaf_newentsize( |
1488 | state->args->namelen, | |
1489 | state->args->valuelen, | |
1490 | state->blocksize, NULL); | |
1da177e4 LT |
1491 | } |
1492 | ||
1493 | *countarg = count; | |
1494 | *usedbytesarg = totallen; | |
1495 | return(foundit); | |
1496 | } | |
1497 | ||
1498 | /*======================================================================== | |
1499 | * Routines used for shrinking the Btree. | |
1500 | *========================================================================*/ | |
1501 | ||
1502 | /* | |
1503 | * Check a leaf block and its neighbors to see if the block should be | |
1504 | * collapsed into one or the other neighbor. Always keep the block | |
1505 | * with the smaller block number. | |
1506 | * If the current block is over 50% full, don't try to join it, return 0. | |
1507 | * If the block is empty, fill in the state structure and return 2. | |
1508 | * If it can be collapsed, fill in the state structure and return 1. | |
1509 | * If nothing can be done, return 0. | |
1510 | * | |
1511 | * GROT: allow for INCOMPLETE entries in calculation. | |
1512 | */ | |
1513 | int | |
1514 | xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action) | |
1515 | { | |
1516 | xfs_attr_leafblock_t *leaf; | |
1517 | xfs_da_state_blk_t *blk; | |
1518 | xfs_da_blkinfo_t *info; | |
1519 | int count, bytes, forward, error, retval, i; | |
1520 | xfs_dablk_t blkno; | |
1521 | xfs_dabuf_t *bp; | |
1522 | ||
1523 | /* | |
1524 | * Check for the degenerate case of the block being over 50% full. | |
1525 | * If so, it's not worth even looking to see if we might be able | |
1526 | * to coalesce with a sibling. | |
1527 | */ | |
1528 | blk = &state->path.blk[ state->path.active-1 ]; | |
1529 | info = blk->bp->data; | |
89da0544 | 1530 | ASSERT(be16_to_cpu(info->magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 | 1531 | leaf = (xfs_attr_leafblock_t *)info; |
918ae424 | 1532 | count = be16_to_cpu(leaf->hdr.count); |
1da177e4 LT |
1533 | bytes = sizeof(xfs_attr_leaf_hdr_t) + |
1534 | count * sizeof(xfs_attr_leaf_entry_t) + | |
918ae424 | 1535 | be16_to_cpu(leaf->hdr.usedbytes); |
1da177e4 LT |
1536 | if (bytes > (state->blocksize >> 1)) { |
1537 | *action = 0; /* blk over 50%, don't try to join */ | |
1538 | return(0); | |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * Check for the degenerate case of the block being empty. | |
1543 | * If the block is empty, we'll simply delete it, no need to | |
c41564b5 | 1544 | * coalesce it with a sibling block. We choose (arbitrarily) |
1da177e4 LT |
1545 | * to merge with the forward block unless it is NULL. |
1546 | */ | |
1547 | if (count == 0) { | |
1548 | /* | |
1549 | * Make altpath point to the block we want to keep and | |
1550 | * path point to the block we want to drop (this one). | |
1551 | */ | |
89da0544 | 1552 | forward = (info->forw != 0); |
1da177e4 LT |
1553 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
1554 | error = xfs_da_path_shift(state, &state->altpath, forward, | |
1555 | 0, &retval); | |
1556 | if (error) | |
1557 | return(error); | |
1558 | if (retval) { | |
1559 | *action = 0; | |
1560 | } else { | |
1561 | *action = 2; | |
1562 | } | |
1563 | return(0); | |
1564 | } | |
1565 | ||
1566 | /* | |
1567 | * Examine each sibling block to see if we can coalesce with | |
1568 | * at least 25% free space to spare. We need to figure out | |
1569 | * whether to merge with the forward or the backward block. | |
1570 | * We prefer coalescing with the lower numbered sibling so as | |
1571 | * to shrink an attribute list over time. | |
1572 | */ | |
1573 | /* start with smaller blk num */ | |
89da0544 | 1574 | forward = (be32_to_cpu(info->forw) < be32_to_cpu(info->back)); |
1da177e4 LT |
1575 | for (i = 0; i < 2; forward = !forward, i++) { |
1576 | if (forward) | |
89da0544 | 1577 | blkno = be32_to_cpu(info->forw); |
1da177e4 | 1578 | else |
89da0544 | 1579 | blkno = be32_to_cpu(info->back); |
1da177e4 LT |
1580 | if (blkno == 0) |
1581 | continue; | |
1582 | error = xfs_da_read_buf(state->args->trans, state->args->dp, | |
1583 | blkno, -1, &bp, XFS_ATTR_FORK); | |
1584 | if (error) | |
1585 | return(error); | |
1586 | ASSERT(bp != NULL); | |
1587 | ||
1588 | leaf = (xfs_attr_leafblock_t *)info; | |
918ae424 | 1589 | count = be16_to_cpu(leaf->hdr.count); |
1da177e4 | 1590 | bytes = state->blocksize - (state->blocksize>>2); |
918ae424 | 1591 | bytes -= be16_to_cpu(leaf->hdr.usedbytes); |
1da177e4 | 1592 | leaf = bp->data; |
89da0544 | 1593 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 NS |
1594 | count += be16_to_cpu(leaf->hdr.count); |
1595 | bytes -= be16_to_cpu(leaf->hdr.usedbytes); | |
1da177e4 LT |
1596 | bytes -= count * sizeof(xfs_attr_leaf_entry_t); |
1597 | bytes -= sizeof(xfs_attr_leaf_hdr_t); | |
1598 | xfs_da_brelse(state->args->trans, bp); | |
1599 | if (bytes >= 0) | |
1600 | break; /* fits with at least 25% to spare */ | |
1601 | } | |
1602 | if (i >= 2) { | |
1603 | *action = 0; | |
1604 | return(0); | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Make altpath point to the block we want to keep (the lower | |
1609 | * numbered block) and path point to the block we want to drop. | |
1610 | */ | |
1611 | memcpy(&state->altpath, &state->path, sizeof(state->path)); | |
1612 | if (blkno < blk->blkno) { | |
1613 | error = xfs_da_path_shift(state, &state->altpath, forward, | |
1614 | 0, &retval); | |
1615 | } else { | |
1616 | error = xfs_da_path_shift(state, &state->path, forward, | |
1617 | 0, &retval); | |
1618 | } | |
1619 | if (error) | |
1620 | return(error); | |
1621 | if (retval) { | |
1622 | *action = 0; | |
1623 | } else { | |
1624 | *action = 1; | |
1625 | } | |
1626 | return(0); | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * Remove a name from the leaf attribute list structure. | |
1631 | * | |
1632 | * Return 1 if leaf is less than 37% full, 0 if >= 37% full. | |
1633 | * If two leaves are 37% full, when combined they will leave 25% free. | |
1634 | */ | |
1635 | int | |
1636 | xfs_attr_leaf_remove(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
1637 | { | |
1638 | xfs_attr_leafblock_t *leaf; | |
1639 | xfs_attr_leaf_hdr_t *hdr; | |
1640 | xfs_attr_leaf_map_t *map; | |
1641 | xfs_attr_leaf_entry_t *entry; | |
1642 | int before, after, smallest, entsize; | |
1643 | int tablesize, tmp, i; | |
1644 | xfs_mount_t *mp; | |
1645 | ||
1646 | leaf = bp->data; | |
89da0544 | 1647 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
1648 | hdr = &leaf->hdr; |
1649 | mp = args->trans->t_mountp; | |
918ae424 NS |
1650 | ASSERT((be16_to_cpu(hdr->count) > 0) |
1651 | && (be16_to_cpu(hdr->count) < (XFS_LBSIZE(mp)/8))); | |
1da177e4 | 1652 | ASSERT((args->index >= 0) |
918ae424 NS |
1653 | && (args->index < be16_to_cpu(hdr->count))); |
1654 | ASSERT(be16_to_cpu(hdr->firstused) >= | |
1655 | ((be16_to_cpu(hdr->count) * sizeof(*entry)) + sizeof(*hdr))); | |
1da177e4 | 1656 | entry = &leaf->entries[args->index]; |
6b19f2d8 NS |
1657 | ASSERT(be16_to_cpu(entry->nameidx) >= be16_to_cpu(hdr->firstused)); |
1658 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); | |
1da177e4 LT |
1659 | |
1660 | /* | |
1661 | * Scan through free region table: | |
1662 | * check for adjacency of free'd entry with an existing one, | |
1663 | * find smallest free region in case we need to replace it, | |
1664 | * adjust any map that borders the entry table, | |
1665 | */ | |
918ae424 | 1666 | tablesize = be16_to_cpu(hdr->count) * sizeof(xfs_attr_leaf_entry_t) |
1da177e4 LT |
1667 | + sizeof(xfs_attr_leaf_hdr_t); |
1668 | map = &hdr->freemap[0]; | |
918ae424 | 1669 | tmp = be16_to_cpu(map->size); |
1da177e4 LT |
1670 | before = after = -1; |
1671 | smallest = XFS_ATTR_LEAF_MAPSIZE - 1; | |
1672 | entsize = xfs_attr_leaf_entsize(leaf, args->index); | |
1673 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; map++, i++) { | |
918ae424 NS |
1674 | ASSERT(be16_to_cpu(map->base) < XFS_LBSIZE(mp)); |
1675 | ASSERT(be16_to_cpu(map->size) < XFS_LBSIZE(mp)); | |
1676 | if (be16_to_cpu(map->base) == tablesize) { | |
1677 | be16_add(&map->base, | |
1678 | -((int)sizeof(xfs_attr_leaf_entry_t))); | |
1679 | be16_add(&map->size, sizeof(xfs_attr_leaf_entry_t)); | |
1da177e4 LT |
1680 | } |
1681 | ||
918ae424 | 1682 | if ((be16_to_cpu(map->base) + be16_to_cpu(map->size)) |
6b19f2d8 | 1683 | == be16_to_cpu(entry->nameidx)) { |
1da177e4 | 1684 | before = i; |
918ae424 | 1685 | } else if (be16_to_cpu(map->base) |
6b19f2d8 | 1686 | == (be16_to_cpu(entry->nameidx) + entsize)) { |
1da177e4 | 1687 | after = i; |
918ae424 NS |
1688 | } else if (be16_to_cpu(map->size) < tmp) { |
1689 | tmp = be16_to_cpu(map->size); | |
1da177e4 LT |
1690 | smallest = i; |
1691 | } | |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * Coalesce adjacent freemap regions, | |
1696 | * or replace the smallest region. | |
1697 | */ | |
1698 | if ((before >= 0) || (after >= 0)) { | |
1699 | if ((before >= 0) && (after >= 0)) { | |
1700 | map = &hdr->freemap[before]; | |
918ae424 NS |
1701 | be16_add(&map->size, entsize); |
1702 | be16_add(&map->size, | |
1703 | be16_to_cpu(hdr->freemap[after].size)); | |
1da177e4 LT |
1704 | hdr->freemap[after].base = 0; |
1705 | hdr->freemap[after].size = 0; | |
1706 | } else if (before >= 0) { | |
1707 | map = &hdr->freemap[before]; | |
918ae424 | 1708 | be16_add(&map->size, entsize); |
1da177e4 LT |
1709 | } else { |
1710 | map = &hdr->freemap[after]; | |
1711 | /* both on-disk, don't endian flip twice */ | |
1712 | map->base = entry->nameidx; | |
918ae424 | 1713 | be16_add(&map->size, entsize); |
1da177e4 LT |
1714 | } |
1715 | } else { | |
1716 | /* | |
1717 | * Replace smallest region (if it is smaller than free'd entry) | |
1718 | */ | |
1719 | map = &hdr->freemap[smallest]; | |
918ae424 | 1720 | if (be16_to_cpu(map->size) < entsize) { |
6b19f2d8 | 1721 | map->base = cpu_to_be16(be16_to_cpu(entry->nameidx)); |
918ae424 | 1722 | map->size = cpu_to_be16(entsize); |
1da177e4 LT |
1723 | } |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Did we remove the first entry? | |
1728 | */ | |
6b19f2d8 | 1729 | if (be16_to_cpu(entry->nameidx) == be16_to_cpu(hdr->firstused)) |
1da177e4 LT |
1730 | smallest = 1; |
1731 | else | |
1732 | smallest = 0; | |
1733 | ||
1734 | /* | |
1735 | * Compress the remaining entries and zero out the removed stuff. | |
1736 | */ | |
1737 | memset(XFS_ATTR_LEAF_NAME(leaf, args->index), 0, entsize); | |
918ae424 | 1738 | be16_add(&hdr->usedbytes, -entsize); |
1da177e4 LT |
1739 | xfs_da_log_buf(args->trans, bp, |
1740 | XFS_DA_LOGRANGE(leaf, XFS_ATTR_LEAF_NAME(leaf, args->index), | |
1741 | entsize)); | |
1742 | ||
918ae424 | 1743 | tmp = (be16_to_cpu(hdr->count) - args->index) |
1da177e4 LT |
1744 | * sizeof(xfs_attr_leaf_entry_t); |
1745 | memmove((char *)entry, (char *)(entry+1), tmp); | |
918ae424 | 1746 | be16_add(&hdr->count, -1); |
1da177e4 LT |
1747 | xfs_da_log_buf(args->trans, bp, |
1748 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); | |
918ae424 | 1749 | entry = &leaf->entries[be16_to_cpu(hdr->count)]; |
1da177e4 LT |
1750 | memset((char *)entry, 0, sizeof(xfs_attr_leaf_entry_t)); |
1751 | ||
1752 | /* | |
1753 | * If we removed the first entry, re-find the first used byte | |
1754 | * in the name area. Note that if the entry was the "firstused", | |
1755 | * then we don't have a "hole" in our block resulting from | |
1756 | * removing the name. | |
1757 | */ | |
1758 | if (smallest) { | |
1759 | tmp = XFS_LBSIZE(mp); | |
1760 | entry = &leaf->entries[0]; | |
918ae424 | 1761 | for (i = be16_to_cpu(hdr->count)-1; i >= 0; entry++, i--) { |
6b19f2d8 NS |
1762 | ASSERT(be16_to_cpu(entry->nameidx) >= |
1763 | be16_to_cpu(hdr->firstused)); | |
1764 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); | |
1765 | ||
1766 | if (be16_to_cpu(entry->nameidx) < tmp) | |
1767 | tmp = be16_to_cpu(entry->nameidx); | |
1da177e4 | 1768 | } |
918ae424 | 1769 | hdr->firstused = cpu_to_be16(tmp); |
1da177e4 | 1770 | if (!hdr->firstused) { |
918ae424 | 1771 | hdr->firstused = cpu_to_be16( |
1da177e4 LT |
1772 | tmp - XFS_ATTR_LEAF_NAME_ALIGN); |
1773 | } | |
1774 | } else { | |
1775 | hdr->holes = 1; /* mark as needing compaction */ | |
1776 | } | |
1777 | xfs_da_log_buf(args->trans, bp, | |
1778 | XFS_DA_LOGRANGE(leaf, hdr, sizeof(*hdr))); | |
1779 | ||
1780 | /* | |
1781 | * Check if leaf is less than 50% full, caller may want to | |
1782 | * "join" the leaf with a sibling if so. | |
1783 | */ | |
1784 | tmp = sizeof(xfs_attr_leaf_hdr_t); | |
918ae424 NS |
1785 | tmp += be16_to_cpu(leaf->hdr.count) * sizeof(xfs_attr_leaf_entry_t); |
1786 | tmp += be16_to_cpu(leaf->hdr.usedbytes); | |
1da177e4 LT |
1787 | return(tmp < mp->m_attr_magicpct); /* leaf is < 37% full */ |
1788 | } | |
1789 | ||
1790 | /* | |
1791 | * Move all the attribute list entries from drop_leaf into save_leaf. | |
1792 | */ | |
1793 | void | |
1794 | xfs_attr_leaf_unbalance(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk, | |
1795 | xfs_da_state_blk_t *save_blk) | |
1796 | { | |
1797 | xfs_attr_leafblock_t *drop_leaf, *save_leaf, *tmp_leaf; | |
1798 | xfs_attr_leaf_hdr_t *drop_hdr, *save_hdr, *tmp_hdr; | |
1799 | xfs_mount_t *mp; | |
1800 | char *tmpbuffer; | |
1801 | ||
1802 | /* | |
1803 | * Set up environment. | |
1804 | */ | |
1805 | mp = state->mp; | |
1806 | ASSERT(drop_blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1807 | ASSERT(save_blk->magic == XFS_ATTR_LEAF_MAGIC); | |
1808 | drop_leaf = drop_blk->bp->data; | |
1809 | save_leaf = save_blk->bp->data; | |
89da0544 NS |
1810 | ASSERT(be16_to_cpu(drop_leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1811 | ASSERT(be16_to_cpu(save_leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); | |
1da177e4 LT |
1812 | drop_hdr = &drop_leaf->hdr; |
1813 | save_hdr = &save_leaf->hdr; | |
1814 | ||
1815 | /* | |
1816 | * Save last hashval from dying block for later Btree fixup. | |
1817 | */ | |
6b19f2d8 NS |
1818 | drop_blk->hashval = be32_to_cpu( |
1819 | drop_leaf->entries[be16_to_cpu(drop_leaf->hdr.count)-1].hashval); | |
1da177e4 LT |
1820 | |
1821 | /* | |
1822 | * Check if we need a temp buffer, or can we do it in place. | |
1823 | * Note that we don't check "leaf" for holes because we will | |
1824 | * always be dropping it, toosmall() decided that for us already. | |
1825 | */ | |
1826 | if (save_hdr->holes == 0) { | |
1827 | /* | |
1828 | * dest leaf has no holes, so we add there. May need | |
1829 | * to make some room in the entry array. | |
1830 | */ | |
1831 | if (xfs_attr_leaf_order(save_blk->bp, drop_blk->bp)) { | |
1832 | xfs_attr_leaf_moveents(drop_leaf, 0, save_leaf, 0, | |
918ae424 | 1833 | be16_to_cpu(drop_hdr->count), mp); |
1da177e4 LT |
1834 | } else { |
1835 | xfs_attr_leaf_moveents(drop_leaf, 0, save_leaf, | |
918ae424 NS |
1836 | be16_to_cpu(save_hdr->count), |
1837 | be16_to_cpu(drop_hdr->count), mp); | |
1da177e4 LT |
1838 | } |
1839 | } else { | |
1840 | /* | |
1841 | * Destination has holes, so we make a temporary copy | |
1842 | * of the leaf and add them both to that. | |
1843 | */ | |
1844 | tmpbuffer = kmem_alloc(state->blocksize, KM_SLEEP); | |
1845 | ASSERT(tmpbuffer != NULL); | |
1846 | memset(tmpbuffer, 0, state->blocksize); | |
1847 | tmp_leaf = (xfs_attr_leafblock_t *)tmpbuffer; | |
1848 | tmp_hdr = &tmp_leaf->hdr; | |
1849 | tmp_hdr->info = save_hdr->info; /* struct copy */ | |
1850 | tmp_hdr->count = 0; | |
918ae424 | 1851 | tmp_hdr->firstused = cpu_to_be16(state->blocksize); |
1da177e4 | 1852 | if (!tmp_hdr->firstused) { |
918ae424 | 1853 | tmp_hdr->firstused = cpu_to_be16( |
1da177e4 LT |
1854 | state->blocksize - XFS_ATTR_LEAF_NAME_ALIGN); |
1855 | } | |
1856 | tmp_hdr->usedbytes = 0; | |
1857 | if (xfs_attr_leaf_order(save_blk->bp, drop_blk->bp)) { | |
1858 | xfs_attr_leaf_moveents(drop_leaf, 0, tmp_leaf, 0, | |
918ae424 | 1859 | be16_to_cpu(drop_hdr->count), mp); |
1da177e4 | 1860 | xfs_attr_leaf_moveents(save_leaf, 0, tmp_leaf, |
918ae424 NS |
1861 | be16_to_cpu(tmp_leaf->hdr.count), |
1862 | be16_to_cpu(save_hdr->count), mp); | |
1da177e4 LT |
1863 | } else { |
1864 | xfs_attr_leaf_moveents(save_leaf, 0, tmp_leaf, 0, | |
918ae424 | 1865 | be16_to_cpu(save_hdr->count), mp); |
1da177e4 | 1866 | xfs_attr_leaf_moveents(drop_leaf, 0, tmp_leaf, |
918ae424 NS |
1867 | be16_to_cpu(tmp_leaf->hdr.count), |
1868 | be16_to_cpu(drop_hdr->count), mp); | |
1da177e4 LT |
1869 | } |
1870 | memcpy((char *)save_leaf, (char *)tmp_leaf, state->blocksize); | |
1871 | kmem_free(tmpbuffer, state->blocksize); | |
1872 | } | |
1873 | ||
1874 | xfs_da_log_buf(state->args->trans, save_blk->bp, 0, | |
1875 | state->blocksize - 1); | |
1876 | ||
1877 | /* | |
1878 | * Copy out last hashval in each block for B-tree code. | |
1879 | */ | |
6b19f2d8 NS |
1880 | save_blk->hashval = be32_to_cpu( |
1881 | save_leaf->entries[be16_to_cpu(save_leaf->hdr.count)-1].hashval); | |
1da177e4 LT |
1882 | } |
1883 | ||
1884 | /*======================================================================== | |
1885 | * Routines used for finding things in the Btree. | |
1886 | *========================================================================*/ | |
1887 | ||
1888 | /* | |
1889 | * Look up a name in a leaf attribute list structure. | |
1890 | * This is the internal routine, it uses the caller's buffer. | |
1891 | * | |
1892 | * Note that duplicate keys are allowed, but only check within the | |
1893 | * current leaf node. The Btree code must check in adjacent leaf nodes. | |
1894 | * | |
1895 | * Return in args->index the index into the entry[] array of either | |
1896 | * the found entry, or where the entry should have been (insert before | |
1897 | * that entry). | |
1898 | * | |
1899 | * Don't change the args->value unless we find the attribute. | |
1900 | */ | |
1901 | int | |
1902 | xfs_attr_leaf_lookup_int(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
1903 | { | |
1904 | xfs_attr_leafblock_t *leaf; | |
1905 | xfs_attr_leaf_entry_t *entry; | |
1906 | xfs_attr_leaf_name_local_t *name_loc; | |
1907 | xfs_attr_leaf_name_remote_t *name_rmt; | |
1908 | int probe, span; | |
1909 | xfs_dahash_t hashval; | |
1910 | ||
1911 | leaf = bp->data; | |
89da0544 | 1912 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 | 1913 | ASSERT(be16_to_cpu(leaf->hdr.count) |
1da177e4 LT |
1914 | < (XFS_LBSIZE(args->dp->i_mount)/8)); |
1915 | ||
1916 | /* | |
1917 | * Binary search. (note: small blocks will skip this loop) | |
1918 | */ | |
1919 | hashval = args->hashval; | |
918ae424 | 1920 | probe = span = be16_to_cpu(leaf->hdr.count) / 2; |
1da177e4 LT |
1921 | for (entry = &leaf->entries[probe]; span > 4; |
1922 | entry = &leaf->entries[probe]) { | |
1923 | span /= 2; | |
6b19f2d8 | 1924 | if (be32_to_cpu(entry->hashval) < hashval) |
1da177e4 | 1925 | probe += span; |
6b19f2d8 | 1926 | else if (be32_to_cpu(entry->hashval) > hashval) |
1da177e4 LT |
1927 | probe -= span; |
1928 | else | |
1929 | break; | |
1930 | } | |
1931 | ASSERT((probe >= 0) && | |
1932 | (!leaf->hdr.count | |
918ae424 | 1933 | || (probe < be16_to_cpu(leaf->hdr.count)))); |
6b19f2d8 | 1934 | ASSERT((span <= 4) || (be32_to_cpu(entry->hashval) == hashval)); |
1da177e4 LT |
1935 | |
1936 | /* | |
1937 | * Since we may have duplicate hashval's, find the first matching | |
1938 | * hashval in the leaf. | |
1939 | */ | |
6b19f2d8 | 1940 | while ((probe > 0) && (be32_to_cpu(entry->hashval) >= hashval)) { |
1da177e4 LT |
1941 | entry--; |
1942 | probe--; | |
1943 | } | |
6b19f2d8 NS |
1944 | while ((probe < be16_to_cpu(leaf->hdr.count)) && |
1945 | (be32_to_cpu(entry->hashval) < hashval)) { | |
1da177e4 LT |
1946 | entry++; |
1947 | probe++; | |
1948 | } | |
6b19f2d8 NS |
1949 | if ((probe == be16_to_cpu(leaf->hdr.count)) || |
1950 | (be32_to_cpu(entry->hashval) != hashval)) { | |
1da177e4 LT |
1951 | args->index = probe; |
1952 | return(XFS_ERROR(ENOATTR)); | |
1953 | } | |
1954 | ||
1955 | /* | |
1956 | * Duplicate keys may be present, so search all of them for a match. | |
1957 | */ | |
6b19f2d8 NS |
1958 | for ( ; (probe < be16_to_cpu(leaf->hdr.count)) && |
1959 | (be32_to_cpu(entry->hashval) == hashval); | |
1da177e4 LT |
1960 | entry++, probe++) { |
1961 | /* | |
1962 | * GROT: Add code to remove incomplete entries. | |
1963 | */ | |
1964 | /* | |
1965 | * If we are looking for INCOMPLETE entries, show only those. | |
1966 | * If we are looking for complete entries, show only those. | |
1967 | */ | |
1968 | if ((args->flags & XFS_ATTR_INCOMPLETE) != | |
1969 | (entry->flags & XFS_ATTR_INCOMPLETE)) { | |
1970 | continue; | |
1971 | } | |
1972 | if (entry->flags & XFS_ATTR_LOCAL) { | |
1973 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, probe); | |
1974 | if (name_loc->namelen != args->namelen) | |
1975 | continue; | |
1976 | if (memcmp(args->name, (char *)name_loc->nameval, | |
1977 | args->namelen) != 0) | |
1978 | continue; | |
1979 | if (((args->flags & ATTR_SECURE) != 0) != | |
1980 | ((entry->flags & XFS_ATTR_SECURE) != 0)) | |
1981 | continue; | |
1982 | if (((args->flags & ATTR_ROOT) != 0) != | |
1983 | ((entry->flags & XFS_ATTR_ROOT) != 0)) | |
1984 | continue; | |
1985 | args->index = probe; | |
1986 | return(XFS_ERROR(EEXIST)); | |
1987 | } else { | |
1988 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, probe); | |
1989 | if (name_rmt->namelen != args->namelen) | |
1990 | continue; | |
1991 | if (memcmp(args->name, (char *)name_rmt->name, | |
1992 | args->namelen) != 0) | |
1993 | continue; | |
1994 | if (((args->flags & ATTR_SECURE) != 0) != | |
1995 | ((entry->flags & XFS_ATTR_SECURE) != 0)) | |
1996 | continue; | |
1997 | if (((args->flags & ATTR_ROOT) != 0) != | |
1998 | ((entry->flags & XFS_ATTR_ROOT) != 0)) | |
1999 | continue; | |
2000 | args->index = probe; | |
c0f054e7 | 2001 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
1da177e4 | 2002 | args->rmtblkcnt = XFS_B_TO_FSB(args->dp->i_mount, |
c0f054e7 | 2003 | be32_to_cpu(name_rmt->valuelen)); |
1da177e4 LT |
2004 | return(XFS_ERROR(EEXIST)); |
2005 | } | |
2006 | } | |
2007 | args->index = probe; | |
2008 | return(XFS_ERROR(ENOATTR)); | |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * Get the value associated with an attribute name from a leaf attribute | |
2013 | * list structure. | |
2014 | */ | |
2015 | int | |
2016 | xfs_attr_leaf_getvalue(xfs_dabuf_t *bp, xfs_da_args_t *args) | |
2017 | { | |
2018 | int valuelen; | |
2019 | xfs_attr_leafblock_t *leaf; | |
2020 | xfs_attr_leaf_entry_t *entry; | |
2021 | xfs_attr_leaf_name_local_t *name_loc; | |
2022 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2023 | ||
2024 | leaf = bp->data; | |
89da0544 | 2025 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 | 2026 | ASSERT(be16_to_cpu(leaf->hdr.count) |
1da177e4 | 2027 | < (XFS_LBSIZE(args->dp->i_mount)/8)); |
918ae424 | 2028 | ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); |
1da177e4 LT |
2029 | |
2030 | entry = &leaf->entries[args->index]; | |
2031 | if (entry->flags & XFS_ATTR_LOCAL) { | |
2032 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index); | |
2033 | ASSERT(name_loc->namelen == args->namelen); | |
2034 | ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0); | |
053b5758 | 2035 | valuelen = be16_to_cpu(name_loc->valuelen); |
1da177e4 LT |
2036 | if (args->flags & ATTR_KERNOVAL) { |
2037 | args->valuelen = valuelen; | |
2038 | return(0); | |
2039 | } | |
2040 | if (args->valuelen < valuelen) { | |
2041 | args->valuelen = valuelen; | |
2042 | return(XFS_ERROR(ERANGE)); | |
2043 | } | |
2044 | args->valuelen = valuelen; | |
2045 | memcpy(args->value, &name_loc->nameval[args->namelen], valuelen); | |
2046 | } else { | |
2047 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index); | |
2048 | ASSERT(name_rmt->namelen == args->namelen); | |
2049 | ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0); | |
c0f054e7 NS |
2050 | valuelen = be32_to_cpu(name_rmt->valuelen); |
2051 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); | |
1da177e4 LT |
2052 | args->rmtblkcnt = XFS_B_TO_FSB(args->dp->i_mount, valuelen); |
2053 | if (args->flags & ATTR_KERNOVAL) { | |
2054 | args->valuelen = valuelen; | |
2055 | return(0); | |
2056 | } | |
2057 | if (args->valuelen < valuelen) { | |
2058 | args->valuelen = valuelen; | |
2059 | return(XFS_ERROR(ERANGE)); | |
2060 | } | |
2061 | args->valuelen = valuelen; | |
2062 | } | |
2063 | return(0); | |
2064 | } | |
2065 | ||
2066 | /*======================================================================== | |
2067 | * Utility routines. | |
2068 | *========================================================================*/ | |
2069 | ||
2070 | /* | |
2071 | * Move the indicated entries from one leaf to another. | |
2072 | * NOTE: this routine modifies both source and destination leaves. | |
2073 | */ | |
2074 | /*ARGSUSED*/ | |
2075 | STATIC void | |
2076 | xfs_attr_leaf_moveents(xfs_attr_leafblock_t *leaf_s, int start_s, | |
2077 | xfs_attr_leafblock_t *leaf_d, int start_d, | |
2078 | int count, xfs_mount_t *mp) | |
2079 | { | |
2080 | xfs_attr_leaf_hdr_t *hdr_s, *hdr_d; | |
2081 | xfs_attr_leaf_entry_t *entry_s, *entry_d; | |
2082 | int desti, tmp, i; | |
2083 | ||
2084 | /* | |
2085 | * Check for nothing to do. | |
2086 | */ | |
2087 | if (count == 0) | |
2088 | return; | |
2089 | ||
2090 | /* | |
2091 | * Set up environment. | |
2092 | */ | |
89da0544 NS |
2093 | ASSERT(be16_to_cpu(leaf_s->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
2094 | ASSERT(be16_to_cpu(leaf_d->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); | |
1da177e4 LT |
2095 | hdr_s = &leaf_s->hdr; |
2096 | hdr_d = &leaf_d->hdr; | |
918ae424 NS |
2097 | ASSERT((be16_to_cpu(hdr_s->count) > 0) && |
2098 | (be16_to_cpu(hdr_s->count) < (XFS_LBSIZE(mp)/8))); | |
2099 | ASSERT(be16_to_cpu(hdr_s->firstused) >= | |
2100 | ((be16_to_cpu(hdr_s->count) | |
1da177e4 | 2101 | * sizeof(*entry_s))+sizeof(*hdr_s))); |
918ae424 NS |
2102 | ASSERT(be16_to_cpu(hdr_d->count) < (XFS_LBSIZE(mp)/8)); |
2103 | ASSERT(be16_to_cpu(hdr_d->firstused) >= | |
2104 | ((be16_to_cpu(hdr_d->count) | |
1da177e4 LT |
2105 | * sizeof(*entry_d))+sizeof(*hdr_d))); |
2106 | ||
918ae424 NS |
2107 | ASSERT(start_s < be16_to_cpu(hdr_s->count)); |
2108 | ASSERT(start_d <= be16_to_cpu(hdr_d->count)); | |
2109 | ASSERT(count <= be16_to_cpu(hdr_s->count)); | |
1da177e4 LT |
2110 | |
2111 | /* | |
2112 | * Move the entries in the destination leaf up to make a hole? | |
2113 | */ | |
918ae424 NS |
2114 | if (start_d < be16_to_cpu(hdr_d->count)) { |
2115 | tmp = be16_to_cpu(hdr_d->count) - start_d; | |
1da177e4 LT |
2116 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
2117 | entry_s = &leaf_d->entries[start_d]; | |
2118 | entry_d = &leaf_d->entries[start_d + count]; | |
2119 | memmove((char *)entry_d, (char *)entry_s, tmp); | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | * Copy all entry's in the same (sorted) order, | |
2124 | * but allocate attribute info packed and in sequence. | |
2125 | */ | |
2126 | entry_s = &leaf_s->entries[start_s]; | |
2127 | entry_d = &leaf_d->entries[start_d]; | |
2128 | desti = start_d; | |
2129 | for (i = 0; i < count; entry_s++, entry_d++, desti++, i++) { | |
6b19f2d8 | 2130 | ASSERT(be16_to_cpu(entry_s->nameidx) |
918ae424 | 2131 | >= be16_to_cpu(hdr_s->firstused)); |
1da177e4 LT |
2132 | tmp = xfs_attr_leaf_entsize(leaf_s, start_s + i); |
2133 | #ifdef GROT | |
2134 | /* | |
2135 | * Code to drop INCOMPLETE entries. Difficult to use as we | |
2136 | * may also need to change the insertion index. Code turned | |
2137 | * off for 6.2, should be revisited later. | |
2138 | */ | |
2139 | if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */ | |
2140 | memset(XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), 0, tmp); | |
918ae424 NS |
2141 | be16_add(&hdr_s->usedbytes, -tmp); |
2142 | be16_add(&hdr_s->count, -1); | |
1da177e4 LT |
2143 | entry_d--; /* to compensate for ++ in loop hdr */ |
2144 | desti--; | |
2145 | if ((start_s + i) < offset) | |
2146 | result++; /* insertion index adjustment */ | |
2147 | } else { | |
2148 | #endif /* GROT */ | |
918ae424 | 2149 | be16_add(&hdr_d->firstused, -tmp); |
1da177e4 LT |
2150 | /* both on-disk, don't endian flip twice */ |
2151 | entry_d->hashval = entry_s->hashval; | |
2152 | /* both on-disk, don't endian flip twice */ | |
2153 | entry_d->nameidx = hdr_d->firstused; | |
2154 | entry_d->flags = entry_s->flags; | |
6b19f2d8 | 2155 | ASSERT(be16_to_cpu(entry_d->nameidx) + tmp |
1da177e4 LT |
2156 | <= XFS_LBSIZE(mp)); |
2157 | memmove(XFS_ATTR_LEAF_NAME(leaf_d, desti), | |
2158 | XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), tmp); | |
6b19f2d8 | 2159 | ASSERT(be16_to_cpu(entry_s->nameidx) + tmp |
1da177e4 LT |
2160 | <= XFS_LBSIZE(mp)); |
2161 | memset(XFS_ATTR_LEAF_NAME(leaf_s, start_s + i), 0, tmp); | |
918ae424 NS |
2162 | be16_add(&hdr_s->usedbytes, -tmp); |
2163 | be16_add(&hdr_d->usedbytes, tmp); | |
2164 | be16_add(&hdr_s->count, -1); | |
2165 | be16_add(&hdr_d->count, 1); | |
2166 | tmp = be16_to_cpu(hdr_d->count) | |
1da177e4 LT |
2167 | * sizeof(xfs_attr_leaf_entry_t) |
2168 | + sizeof(xfs_attr_leaf_hdr_t); | |
918ae424 | 2169 | ASSERT(be16_to_cpu(hdr_d->firstused) >= tmp); |
1da177e4 LT |
2170 | #ifdef GROT |
2171 | } | |
2172 | #endif /* GROT */ | |
2173 | } | |
2174 | ||
2175 | /* | |
2176 | * Zero out the entries we just copied. | |
2177 | */ | |
918ae424 | 2178 | if (start_s == be16_to_cpu(hdr_s->count)) { |
1da177e4 LT |
2179 | tmp = count * sizeof(xfs_attr_leaf_entry_t); |
2180 | entry_s = &leaf_s->entries[start_s]; | |
2181 | ASSERT(((char *)entry_s + tmp) <= | |
2182 | ((char *)leaf_s + XFS_LBSIZE(mp))); | |
2183 | memset((char *)entry_s, 0, tmp); | |
2184 | } else { | |
2185 | /* | |
2186 | * Move the remaining entries down to fill the hole, | |
2187 | * then zero the entries at the top. | |
2188 | */ | |
918ae424 | 2189 | tmp = be16_to_cpu(hdr_s->count) - count; |
1da177e4 LT |
2190 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
2191 | entry_s = &leaf_s->entries[start_s + count]; | |
2192 | entry_d = &leaf_s->entries[start_s]; | |
2193 | memmove((char *)entry_d, (char *)entry_s, tmp); | |
2194 | ||
2195 | tmp = count * sizeof(xfs_attr_leaf_entry_t); | |
918ae424 | 2196 | entry_s = &leaf_s->entries[be16_to_cpu(hdr_s->count)]; |
1da177e4 LT |
2197 | ASSERT(((char *)entry_s + tmp) <= |
2198 | ((char *)leaf_s + XFS_LBSIZE(mp))); | |
2199 | memset((char *)entry_s, 0, tmp); | |
2200 | } | |
2201 | ||
2202 | /* | |
2203 | * Fill in the freemap information | |
2204 | */ | |
918ae424 NS |
2205 | hdr_d->freemap[0].base = cpu_to_be16(sizeof(xfs_attr_leaf_hdr_t)); |
2206 | be16_add(&hdr_d->freemap[0].base, be16_to_cpu(hdr_d->count) * | |
2207 | sizeof(xfs_attr_leaf_entry_t)); | |
2208 | hdr_d->freemap[0].size = cpu_to_be16(be16_to_cpu(hdr_d->firstused) | |
2209 | - be16_to_cpu(hdr_d->freemap[0].base)); | |
1da177e4 LT |
2210 | hdr_d->freemap[1].base = 0; |
2211 | hdr_d->freemap[2].base = 0; | |
2212 | hdr_d->freemap[1].size = 0; | |
2213 | hdr_d->freemap[2].size = 0; | |
2214 | hdr_s->holes = 1; /* leaf may not be compact */ | |
2215 | } | |
2216 | ||
2217 | /* | |
2218 | * Compare two leaf blocks "order". | |
2219 | * Return 0 unless leaf2 should go before leaf1. | |
2220 | */ | |
2221 | int | |
2222 | xfs_attr_leaf_order(xfs_dabuf_t *leaf1_bp, xfs_dabuf_t *leaf2_bp) | |
2223 | { | |
2224 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
2225 | ||
2226 | leaf1 = leaf1_bp->data; | |
2227 | leaf2 = leaf2_bp->data; | |
89da0544 NS |
2228 | ASSERT((be16_to_cpu(leaf1->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC) && |
2229 | (be16_to_cpu(leaf2->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC)); | |
918ae424 NS |
2230 | if ((be16_to_cpu(leaf1->hdr.count) > 0) && |
2231 | (be16_to_cpu(leaf2->hdr.count) > 0) && | |
6b19f2d8 NS |
2232 | ((be32_to_cpu(leaf2->entries[0].hashval) < |
2233 | be32_to_cpu(leaf1->entries[0].hashval)) || | |
2234 | (be32_to_cpu(leaf2->entries[ | |
2235 | be16_to_cpu(leaf2->hdr.count)-1].hashval) < | |
2236 | be32_to_cpu(leaf1->entries[ | |
2237 | be16_to_cpu(leaf1->hdr.count)-1].hashval)))) { | |
1da177e4 LT |
2238 | return(1); |
2239 | } | |
2240 | return(0); | |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * Pick up the last hashvalue from a leaf block. | |
2245 | */ | |
2246 | xfs_dahash_t | |
2247 | xfs_attr_leaf_lasthash(xfs_dabuf_t *bp, int *count) | |
2248 | { | |
2249 | xfs_attr_leafblock_t *leaf; | |
2250 | ||
2251 | leaf = bp->data; | |
89da0544 | 2252 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 | 2253 | if (count) |
918ae424 | 2254 | *count = be16_to_cpu(leaf->hdr.count); |
1da177e4 LT |
2255 | if (!leaf->hdr.count) |
2256 | return(0); | |
6b19f2d8 | 2257 | return be32_to_cpu(leaf->entries[be16_to_cpu(leaf->hdr.count)-1].hashval); |
1da177e4 LT |
2258 | } |
2259 | ||
2260 | /* | |
2261 | * Calculate the number of bytes used to store the indicated attribute | |
2262 | * (whether local or remote only calculate bytes in this block). | |
2263 | */ | |
ba0f32d4 | 2264 | STATIC int |
1da177e4 LT |
2265 | xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index) |
2266 | { | |
2267 | xfs_attr_leaf_name_local_t *name_loc; | |
2268 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2269 | int size; | |
2270 | ||
89da0544 | 2271 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
2272 | if (leaf->entries[index].flags & XFS_ATTR_LOCAL) { |
2273 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, index); | |
2274 | size = XFS_ATTR_LEAF_ENTSIZE_LOCAL(name_loc->namelen, | |
053b5758 | 2275 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 LT |
2276 | } else { |
2277 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, index); | |
2278 | size = XFS_ATTR_LEAF_ENTSIZE_REMOTE(name_rmt->namelen); | |
2279 | } | |
2280 | return(size); | |
2281 | } | |
2282 | ||
2283 | /* | |
2284 | * Calculate the number of bytes that would be required to store the new | |
2285 | * attribute (whether local or remote only calculate bytes in this block). | |
2286 | * This routine decides as a side effect whether the attribute will be | |
2287 | * a "local" or a "remote" attribute. | |
2288 | */ | |
2289 | int | |
aa82daa0 | 2290 | xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local) |
1da177e4 LT |
2291 | { |
2292 | int size; | |
2293 | ||
aa82daa0 | 2294 | size = XFS_ATTR_LEAF_ENTSIZE_LOCAL(namelen, valuelen); |
1da177e4 LT |
2295 | if (size < XFS_ATTR_LEAF_ENTSIZE_LOCAL_MAX(blocksize)) { |
2296 | if (local) { | |
2297 | *local = 1; | |
2298 | } | |
2299 | } else { | |
aa82daa0 | 2300 | size = XFS_ATTR_LEAF_ENTSIZE_REMOTE(namelen); |
1da177e4 LT |
2301 | if (local) { |
2302 | *local = 0; | |
2303 | } | |
2304 | } | |
2305 | return(size); | |
2306 | } | |
2307 | ||
2308 | /* | |
2309 | * Copy out attribute list entries for attr_list(), for leaf attribute lists. | |
2310 | */ | |
2311 | int | |
2312 | xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context) | |
2313 | { | |
2314 | attrlist_cursor_kern_t *cursor; | |
2315 | xfs_attr_leafblock_t *leaf; | |
2316 | xfs_attr_leaf_entry_t *entry; | |
2317 | xfs_attr_leaf_name_local_t *name_loc; | |
2318 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2319 | int retval, i; | |
2320 | ||
2321 | ASSERT(bp != NULL); | |
2322 | leaf = bp->data; | |
2323 | cursor = context->cursor; | |
2324 | cursor->initted = 1; | |
2325 | ||
2326 | xfs_attr_trace_l_cl("blk start", context, leaf); | |
2327 | ||
2328 | /* | |
2329 | * Re-find our place in the leaf block if this is a new syscall. | |
2330 | */ | |
2331 | if (context->resynch) { | |
2332 | entry = &leaf->entries[0]; | |
918ae424 | 2333 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
6b19f2d8 | 2334 | if (be32_to_cpu(entry->hashval) == cursor->hashval) { |
1da177e4 LT |
2335 | if (cursor->offset == context->dupcnt) { |
2336 | context->dupcnt = 0; | |
2337 | break; | |
2338 | } | |
2339 | context->dupcnt++; | |
6b19f2d8 NS |
2340 | } else if (be32_to_cpu(entry->hashval) > |
2341 | cursor->hashval) { | |
1da177e4 LT |
2342 | context->dupcnt = 0; |
2343 | break; | |
2344 | } | |
2345 | } | |
918ae424 | 2346 | if (i == be16_to_cpu(leaf->hdr.count)) { |
1da177e4 LT |
2347 | xfs_attr_trace_l_c("not found", context); |
2348 | return(0); | |
2349 | } | |
2350 | } else { | |
2351 | entry = &leaf->entries[0]; | |
2352 | i = 0; | |
2353 | } | |
2354 | context->resynch = 0; | |
2355 | ||
2356 | /* | |
2357 | * We have found our place, start copying out the new attributes. | |
2358 | */ | |
2359 | retval = 0; | |
918ae424 | 2360 | for ( ; (i < be16_to_cpu(leaf->hdr.count)) |
1da177e4 LT |
2361 | && (retval == 0); entry++, i++) { |
2362 | attrnames_t *namesp; | |
2363 | ||
6b19f2d8 NS |
2364 | if (be32_to_cpu(entry->hashval) != cursor->hashval) { |
2365 | cursor->hashval = be32_to_cpu(entry->hashval); | |
1da177e4 LT |
2366 | cursor->offset = 0; |
2367 | } | |
2368 | ||
2369 | if (entry->flags & XFS_ATTR_INCOMPLETE) | |
2370 | continue; /* skip incomplete entries */ | |
2371 | if (((context->flags & ATTR_SECURE) != 0) != | |
2372 | ((entry->flags & XFS_ATTR_SECURE) != 0) && | |
2373 | !(context->flags & ATTR_KERNORMALS)) | |
2374 | continue; /* skip non-matching entries */ | |
2375 | if (((context->flags & ATTR_ROOT) != 0) != | |
2376 | ((entry->flags & XFS_ATTR_ROOT) != 0) && | |
2377 | !(context->flags & ATTR_KERNROOTLS)) | |
2378 | continue; /* skip non-matching entries */ | |
2379 | ||
2380 | namesp = (entry->flags & XFS_ATTR_SECURE) ? &attr_secure : | |
2381 | ((entry->flags & XFS_ATTR_ROOT) ? &attr_trusted : | |
2382 | &attr_user); | |
2383 | ||
2384 | if (entry->flags & XFS_ATTR_LOCAL) { | |
2385 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, i); | |
2386 | if (context->flags & ATTR_KERNOVAL) { | |
2387 | ASSERT(context->flags & ATTR_KERNAMELS); | |
2388 | context->count += namesp->attr_namelen + | |
2389 | (int)name_loc->namelen + 1; | |
2390 | } else { | |
2391 | retval = xfs_attr_put_listent(context, namesp, | |
2392 | (char *)name_loc->nameval, | |
2393 | (int)name_loc->namelen, | |
053b5758 | 2394 | be16_to_cpu(name_loc->valuelen)); |
1da177e4 LT |
2395 | } |
2396 | } else { | |
2397 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i); | |
2398 | if (context->flags & ATTR_KERNOVAL) { | |
2399 | ASSERT(context->flags & ATTR_KERNAMELS); | |
2400 | context->count += namesp->attr_namelen + | |
2401 | (int)name_rmt->namelen + 1; | |
2402 | } else { | |
2403 | retval = xfs_attr_put_listent(context, namesp, | |
2404 | (char *)name_rmt->name, | |
2405 | (int)name_rmt->namelen, | |
c0f054e7 | 2406 | be32_to_cpu(name_rmt->valuelen)); |
1da177e4 LT |
2407 | } |
2408 | } | |
2409 | if (retval == 0) { | |
2410 | cursor->offset++; | |
2411 | } | |
2412 | } | |
2413 | xfs_attr_trace_l_cl("blk end", context, leaf); | |
2414 | return(retval); | |
2415 | } | |
2416 | ||
2417 | #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ | |
2418 | (((struct attrlist_ent *) 0)->a_name - (char *) 0) | |
2419 | #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ | |
2420 | ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \ | |
2421 | & ~(sizeof(u_int32_t)-1)) | |
2422 | ||
2423 | /* | |
2424 | * Format an attribute and copy it out to the user's buffer. | |
2425 | * Take care to check values and protect against them changing later, | |
2426 | * we may be reading them directly out of a user buffer. | |
2427 | */ | |
2428 | /*ARGSUSED*/ | |
ba0f32d4 | 2429 | STATIC int |
1da177e4 LT |
2430 | xfs_attr_put_listent(xfs_attr_list_context_t *context, |
2431 | attrnames_t *namesp, char *name, int namelen, int valuelen) | |
2432 | { | |
2433 | attrlist_ent_t *aep; | |
2434 | int arraytop; | |
2435 | ||
2436 | ASSERT(!(context->flags & ATTR_KERNOVAL)); | |
2437 | if (context->flags & ATTR_KERNAMELS) { | |
2438 | char *offset; | |
2439 | ||
2440 | ASSERT(context->count >= 0); | |
2441 | ||
2442 | arraytop = context->count + namesp->attr_namelen + namelen + 1; | |
2443 | if (arraytop > context->firstu) { | |
2444 | context->count = -1; /* insufficient space */ | |
2445 | return(1); | |
2446 | } | |
2447 | offset = (char *)context->alist + context->count; | |
2448 | strncpy(offset, namesp->attr_name, namesp->attr_namelen); | |
2449 | offset += namesp->attr_namelen; | |
2450 | strncpy(offset, name, namelen); /* real name */ | |
2451 | offset += namelen; | |
2452 | *offset = '\0'; | |
2453 | context->count += namesp->attr_namelen + namelen + 1; | |
2454 | return(0); | |
2455 | } | |
2456 | ||
2457 | ASSERT(context->count >= 0); | |
2458 | ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); | |
2459 | ASSERT(context->firstu >= sizeof(*context->alist)); | |
2460 | ASSERT(context->firstu <= context->bufsize); | |
2461 | ||
2462 | arraytop = sizeof(*context->alist) + | |
2463 | context->count * sizeof(context->alist->al_offset[0]); | |
2464 | context->firstu -= ATTR_ENTSIZE(namelen); | |
2465 | if (context->firstu < arraytop) { | |
2466 | xfs_attr_trace_l_c("buffer full", context); | |
2467 | context->alist->al_more = 1; | |
2468 | return(1); | |
2469 | } | |
2470 | ||
2471 | aep = (attrlist_ent_t *)&(((char *)context->alist)[ context->firstu ]); | |
2472 | aep->a_valuelen = valuelen; | |
2473 | memcpy(aep->a_name, name, namelen); | |
2474 | aep->a_name[ namelen ] = 0; | |
2475 | context->alist->al_offset[ context->count++ ] = context->firstu; | |
2476 | context->alist->al_count = context->count; | |
2477 | xfs_attr_trace_l_c("add", context); | |
2478 | return(0); | |
2479 | } | |
2480 | ||
2481 | /*======================================================================== | |
2482 | * Manage the INCOMPLETE flag in a leaf entry | |
2483 | *========================================================================*/ | |
2484 | ||
2485 | /* | |
2486 | * Clear the INCOMPLETE flag on an entry in a leaf block. | |
2487 | */ | |
2488 | int | |
2489 | xfs_attr_leaf_clearflag(xfs_da_args_t *args) | |
2490 | { | |
2491 | xfs_attr_leafblock_t *leaf; | |
2492 | xfs_attr_leaf_entry_t *entry; | |
2493 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2494 | xfs_dabuf_t *bp; | |
2495 | int error; | |
2496 | #ifdef DEBUG | |
2497 | xfs_attr_leaf_name_local_t *name_loc; | |
2498 | int namelen; | |
2499 | char *name; | |
2500 | #endif /* DEBUG */ | |
2501 | ||
2502 | /* | |
2503 | * Set up the operation. | |
2504 | */ | |
2505 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
2506 | XFS_ATTR_FORK); | |
2507 | if (error) { | |
2508 | return(error); | |
2509 | } | |
2510 | ASSERT(bp != NULL); | |
2511 | ||
2512 | leaf = bp->data; | |
89da0544 | 2513 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 | 2514 | ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); |
1da177e4 LT |
2515 | ASSERT(args->index >= 0); |
2516 | entry = &leaf->entries[ args->index ]; | |
2517 | ASSERT(entry->flags & XFS_ATTR_INCOMPLETE); | |
2518 | ||
2519 | #ifdef DEBUG | |
2520 | if (entry->flags & XFS_ATTR_LOCAL) { | |
2521 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf, args->index); | |
2522 | namelen = name_loc->namelen; | |
2523 | name = (char *)name_loc->nameval; | |
2524 | } else { | |
2525 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index); | |
2526 | namelen = name_rmt->namelen; | |
2527 | name = (char *)name_rmt->name; | |
2528 | } | |
6b19f2d8 | 2529 | ASSERT(be32_to_cpu(entry->hashval) == args->hashval); |
1da177e4 LT |
2530 | ASSERT(namelen == args->namelen); |
2531 | ASSERT(memcmp(name, args->name, namelen) == 0); | |
2532 | #endif /* DEBUG */ | |
2533 | ||
2534 | entry->flags &= ~XFS_ATTR_INCOMPLETE; | |
2535 | xfs_da_log_buf(args->trans, bp, | |
2536 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); | |
2537 | ||
2538 | if (args->rmtblkno) { | |
2539 | ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0); | |
2540 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index); | |
c0f054e7 NS |
2541 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
2542 | name_rmt->valuelen = cpu_to_be32(args->valuelen); | |
1da177e4 LT |
2543 | xfs_da_log_buf(args->trans, bp, |
2544 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); | |
2545 | } | |
2546 | xfs_da_buf_done(bp); | |
2547 | ||
2548 | /* | |
2549 | * Commit the flag value change and start the next trans in series. | |
2550 | */ | |
2551 | error = xfs_attr_rolltrans(&args->trans, args->dp); | |
2552 | ||
2553 | return(error); | |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | * Set the INCOMPLETE flag on an entry in a leaf block. | |
2558 | */ | |
2559 | int | |
2560 | xfs_attr_leaf_setflag(xfs_da_args_t *args) | |
2561 | { | |
2562 | xfs_attr_leafblock_t *leaf; | |
2563 | xfs_attr_leaf_entry_t *entry; | |
2564 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2565 | xfs_dabuf_t *bp; | |
2566 | int error; | |
2567 | ||
2568 | /* | |
2569 | * Set up the operation. | |
2570 | */ | |
2571 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, | |
2572 | XFS_ATTR_FORK); | |
2573 | if (error) { | |
2574 | return(error); | |
2575 | } | |
2576 | ASSERT(bp != NULL); | |
2577 | ||
2578 | leaf = bp->data; | |
89da0544 | 2579 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 | 2580 | ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); |
1da177e4 LT |
2581 | ASSERT(args->index >= 0); |
2582 | entry = &leaf->entries[ args->index ]; | |
2583 | ||
2584 | ASSERT((entry->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2585 | entry->flags |= XFS_ATTR_INCOMPLETE; | |
2586 | xfs_da_log_buf(args->trans, bp, | |
2587 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); | |
2588 | if ((entry->flags & XFS_ATTR_LOCAL) == 0) { | |
2589 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, args->index); | |
2590 | name_rmt->valueblk = 0; | |
2591 | name_rmt->valuelen = 0; | |
2592 | xfs_da_log_buf(args->trans, bp, | |
2593 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); | |
2594 | } | |
2595 | xfs_da_buf_done(bp); | |
2596 | ||
2597 | /* | |
2598 | * Commit the flag value change and start the next trans in series. | |
2599 | */ | |
2600 | error = xfs_attr_rolltrans(&args->trans, args->dp); | |
2601 | ||
2602 | return(error); | |
2603 | } | |
2604 | ||
2605 | /* | |
2606 | * In a single transaction, clear the INCOMPLETE flag on the leaf entry | |
2607 | * given by args->blkno/index and set the INCOMPLETE flag on the leaf | |
2608 | * entry given by args->blkno2/index2. | |
2609 | * | |
2610 | * Note that they could be in different blocks, or in the same block. | |
2611 | */ | |
2612 | int | |
2613 | xfs_attr_leaf_flipflags(xfs_da_args_t *args) | |
2614 | { | |
2615 | xfs_attr_leafblock_t *leaf1, *leaf2; | |
2616 | xfs_attr_leaf_entry_t *entry1, *entry2; | |
2617 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2618 | xfs_dabuf_t *bp1, *bp2; | |
2619 | int error; | |
2620 | #ifdef DEBUG | |
2621 | xfs_attr_leaf_name_local_t *name_loc; | |
2622 | int namelen1, namelen2; | |
2623 | char *name1, *name2; | |
2624 | #endif /* DEBUG */ | |
2625 | ||
2626 | /* | |
2627 | * Read the block containing the "old" attr | |
2628 | */ | |
2629 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp1, | |
2630 | XFS_ATTR_FORK); | |
2631 | if (error) { | |
2632 | return(error); | |
2633 | } | |
2634 | ASSERT(bp1 != NULL); | |
2635 | ||
2636 | /* | |
2637 | * Read the block containing the "new" attr, if it is different | |
2638 | */ | |
2639 | if (args->blkno2 != args->blkno) { | |
2640 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno2, | |
2641 | -1, &bp2, XFS_ATTR_FORK); | |
2642 | if (error) { | |
2643 | return(error); | |
2644 | } | |
2645 | ASSERT(bp2 != NULL); | |
2646 | } else { | |
2647 | bp2 = bp1; | |
2648 | } | |
2649 | ||
2650 | leaf1 = bp1->data; | |
89da0544 | 2651 | ASSERT(be16_to_cpu(leaf1->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 | 2652 | ASSERT(args->index < be16_to_cpu(leaf1->hdr.count)); |
1da177e4 LT |
2653 | ASSERT(args->index >= 0); |
2654 | entry1 = &leaf1->entries[ args->index ]; | |
2655 | ||
2656 | leaf2 = bp2->data; | |
89da0544 | 2657 | ASSERT(be16_to_cpu(leaf2->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
918ae424 | 2658 | ASSERT(args->index2 < be16_to_cpu(leaf2->hdr.count)); |
1da177e4 LT |
2659 | ASSERT(args->index2 >= 0); |
2660 | entry2 = &leaf2->entries[ args->index2 ]; | |
2661 | ||
2662 | #ifdef DEBUG | |
2663 | if (entry1->flags & XFS_ATTR_LOCAL) { | |
2664 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf1, args->index); | |
2665 | namelen1 = name_loc->namelen; | |
2666 | name1 = (char *)name_loc->nameval; | |
2667 | } else { | |
2668 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf1, args->index); | |
2669 | namelen1 = name_rmt->namelen; | |
2670 | name1 = (char *)name_rmt->name; | |
2671 | } | |
2672 | if (entry2->flags & XFS_ATTR_LOCAL) { | |
2673 | name_loc = XFS_ATTR_LEAF_NAME_LOCAL(leaf2, args->index2); | |
2674 | namelen2 = name_loc->namelen; | |
2675 | name2 = (char *)name_loc->nameval; | |
2676 | } else { | |
2677 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf2, args->index2); | |
2678 | namelen2 = name_rmt->namelen; | |
2679 | name2 = (char *)name_rmt->name; | |
2680 | } | |
6b19f2d8 | 2681 | ASSERT(be32_to_cpu(entry1->hashval) == be32_to_cpu(entry2->hashval)); |
1da177e4 LT |
2682 | ASSERT(namelen1 == namelen2); |
2683 | ASSERT(memcmp(name1, name2, namelen1) == 0); | |
2684 | #endif /* DEBUG */ | |
2685 | ||
2686 | ASSERT(entry1->flags & XFS_ATTR_INCOMPLETE); | |
2687 | ASSERT((entry2->flags & XFS_ATTR_INCOMPLETE) == 0); | |
2688 | ||
2689 | entry1->flags &= ~XFS_ATTR_INCOMPLETE; | |
2690 | xfs_da_log_buf(args->trans, bp1, | |
2691 | XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1))); | |
2692 | if (args->rmtblkno) { | |
2693 | ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0); | |
2694 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf1, args->index); | |
c0f054e7 NS |
2695 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
2696 | name_rmt->valuelen = cpu_to_be32(args->valuelen); | |
1da177e4 LT |
2697 | xfs_da_log_buf(args->trans, bp1, |
2698 | XFS_DA_LOGRANGE(leaf1, name_rmt, sizeof(*name_rmt))); | |
2699 | } | |
2700 | ||
2701 | entry2->flags |= XFS_ATTR_INCOMPLETE; | |
2702 | xfs_da_log_buf(args->trans, bp2, | |
2703 | XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2))); | |
2704 | if ((entry2->flags & XFS_ATTR_LOCAL) == 0) { | |
2705 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf2, args->index2); | |
2706 | name_rmt->valueblk = 0; | |
2707 | name_rmt->valuelen = 0; | |
2708 | xfs_da_log_buf(args->trans, bp2, | |
2709 | XFS_DA_LOGRANGE(leaf2, name_rmt, sizeof(*name_rmt))); | |
2710 | } | |
2711 | xfs_da_buf_done(bp1); | |
2712 | if (bp1 != bp2) | |
2713 | xfs_da_buf_done(bp2); | |
2714 | ||
2715 | /* | |
2716 | * Commit the flag value change and start the next trans in series. | |
2717 | */ | |
2718 | error = xfs_attr_rolltrans(&args->trans, args->dp); | |
2719 | ||
2720 | return(error); | |
2721 | } | |
2722 | ||
2723 | /*======================================================================== | |
2724 | * Indiscriminately delete the entire attribute fork | |
2725 | *========================================================================*/ | |
2726 | ||
2727 | /* | |
2728 | * Recurse (gasp!) through the attribute nodes until we find leaves. | |
2729 | * We're doing a depth-first traversal in order to invalidate everything. | |
2730 | */ | |
2731 | int | |
2732 | xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp) | |
2733 | { | |
2734 | xfs_da_blkinfo_t *info; | |
2735 | xfs_daddr_t blkno; | |
2736 | xfs_dabuf_t *bp; | |
2737 | int error; | |
2738 | ||
2739 | /* | |
2740 | * Read block 0 to see what we have to work with. | |
2741 | * We only get here if we have extents, since we remove | |
2742 | * the extents in reverse order the extent containing | |
2743 | * block 0 must still be there. | |
2744 | */ | |
2745 | error = xfs_da_read_buf(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK); | |
2746 | if (error) | |
2747 | return(error); | |
2748 | blkno = xfs_da_blkno(bp); | |
2749 | ||
2750 | /* | |
2751 | * Invalidate the tree, even if the "tree" is only a single leaf block. | |
2752 | * This is a depth-first traversal! | |
2753 | */ | |
2754 | info = bp->data; | |
89da0544 | 2755 | if (be16_to_cpu(info->magic) == XFS_DA_NODE_MAGIC) { |
1da177e4 | 2756 | error = xfs_attr_node_inactive(trans, dp, bp, 1); |
89da0544 | 2757 | } else if (be16_to_cpu(info->magic) == XFS_ATTR_LEAF_MAGIC) { |
1da177e4 LT |
2758 | error = xfs_attr_leaf_inactive(trans, dp, bp); |
2759 | } else { | |
2760 | error = XFS_ERROR(EIO); | |
2761 | xfs_da_brelse(*trans, bp); | |
2762 | } | |
2763 | if (error) | |
2764 | return(error); | |
2765 | ||
2766 | /* | |
2767 | * Invalidate the incore copy of the root block. | |
2768 | */ | |
2769 | error = xfs_da_get_buf(*trans, dp, 0, blkno, &bp, XFS_ATTR_FORK); | |
2770 | if (error) | |
2771 | return(error); | |
2772 | xfs_da_binval(*trans, bp); /* remove from cache */ | |
2773 | /* | |
2774 | * Commit the invalidate and start the next transaction. | |
2775 | */ | |
2776 | error = xfs_attr_rolltrans(trans, dp); | |
2777 | ||
2778 | return (error); | |
2779 | } | |
2780 | ||
2781 | /* | |
2782 | * Recurse (gasp!) through the attribute nodes until we find leaves. | |
2783 | * We're doing a depth-first traversal in order to invalidate everything. | |
2784 | */ | |
ba0f32d4 | 2785 | STATIC int |
1da177e4 LT |
2786 | xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp, |
2787 | int level) | |
2788 | { | |
2789 | xfs_da_blkinfo_t *info; | |
2790 | xfs_da_intnode_t *node; | |
2791 | xfs_dablk_t child_fsb; | |
2792 | xfs_daddr_t parent_blkno, child_blkno; | |
2793 | int error, count, i; | |
2794 | xfs_dabuf_t *child_bp; | |
2795 | ||
2796 | /* | |
2797 | * Since this code is recursive (gasp!) we must protect ourselves. | |
2798 | */ | |
2799 | if (level > XFS_DA_NODE_MAXDEPTH) { | |
2800 | xfs_da_brelse(*trans, bp); /* no locks for later trans */ | |
2801 | return(XFS_ERROR(EIO)); | |
2802 | } | |
2803 | ||
2804 | node = bp->data; | |
89da0544 | 2805 | ASSERT(be16_to_cpu(node->hdr.info.magic) == XFS_DA_NODE_MAGIC); |
1da177e4 | 2806 | parent_blkno = xfs_da_blkno(bp); /* save for re-read later */ |
fac80cce | 2807 | count = be16_to_cpu(node->hdr.count); |
1da177e4 LT |
2808 | if (!count) { |
2809 | xfs_da_brelse(*trans, bp); | |
2810 | return(0); | |
2811 | } | |
403432dc | 2812 | child_fsb = be32_to_cpu(node->btree[0].before); |
1da177e4 LT |
2813 | xfs_da_brelse(*trans, bp); /* no locks for later trans */ |
2814 | ||
2815 | /* | |
2816 | * If this is the node level just above the leaves, simply loop | |
2817 | * over the leaves removing all of them. If this is higher up | |
2818 | * in the tree, recurse downward. | |
2819 | */ | |
2820 | for (i = 0; i < count; i++) { | |
2821 | /* | |
2822 | * Read the subsidiary block to see what we have to work with. | |
2823 | * Don't do this in a transaction. This is a depth-first | |
2824 | * traversal of the tree so we may deal with many blocks | |
2825 | * before we come back to this one. | |
2826 | */ | |
2827 | error = xfs_da_read_buf(*trans, dp, child_fsb, -2, &child_bp, | |
2828 | XFS_ATTR_FORK); | |
2829 | if (error) | |
2830 | return(error); | |
2831 | if (child_bp) { | |
2832 | /* save for re-read later */ | |
2833 | child_blkno = xfs_da_blkno(child_bp); | |
2834 | ||
2835 | /* | |
2836 | * Invalidate the subtree, however we have to. | |
2837 | */ | |
2838 | info = child_bp->data; | |
89da0544 | 2839 | if (be16_to_cpu(info->magic) == XFS_DA_NODE_MAGIC) { |
1da177e4 LT |
2840 | error = xfs_attr_node_inactive(trans, dp, |
2841 | child_bp, level+1); | |
89da0544 | 2842 | } else if (be16_to_cpu(info->magic) == XFS_ATTR_LEAF_MAGIC) { |
1da177e4 LT |
2843 | error = xfs_attr_leaf_inactive(trans, dp, |
2844 | child_bp); | |
2845 | } else { | |
2846 | error = XFS_ERROR(EIO); | |
2847 | xfs_da_brelse(*trans, child_bp); | |
2848 | } | |
2849 | if (error) | |
2850 | return(error); | |
2851 | ||
2852 | /* | |
2853 | * Remove the subsidiary block from the cache | |
2854 | * and from the log. | |
2855 | */ | |
2856 | error = xfs_da_get_buf(*trans, dp, 0, child_blkno, | |
2857 | &child_bp, XFS_ATTR_FORK); | |
2858 | if (error) | |
2859 | return(error); | |
2860 | xfs_da_binval(*trans, child_bp); | |
2861 | } | |
2862 | ||
2863 | /* | |
2864 | * If we're not done, re-read the parent to get the next | |
2865 | * child block number. | |
2866 | */ | |
2867 | if ((i+1) < count) { | |
2868 | error = xfs_da_read_buf(*trans, dp, 0, parent_blkno, | |
2869 | &bp, XFS_ATTR_FORK); | |
2870 | if (error) | |
2871 | return(error); | |
403432dc | 2872 | child_fsb = be32_to_cpu(node->btree[i+1].before); |
1da177e4 LT |
2873 | xfs_da_brelse(*trans, bp); |
2874 | } | |
2875 | /* | |
2876 | * Atomically commit the whole invalidate stuff. | |
2877 | */ | |
2878 | if ((error = xfs_attr_rolltrans(trans, dp))) | |
2879 | return (error); | |
2880 | } | |
2881 | ||
2882 | return(0); | |
2883 | } | |
2884 | ||
2885 | /* | |
2886 | * Invalidate all of the "remote" value regions pointed to by a particular | |
2887 | * leaf block. | |
2888 | * Note that we must release the lock on the buffer so that we are not | |
2889 | * caught holding something that the logging code wants to flush to disk. | |
2890 | */ | |
ba0f32d4 | 2891 | STATIC int |
1da177e4 LT |
2892 | xfs_attr_leaf_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp) |
2893 | { | |
2894 | xfs_attr_leafblock_t *leaf; | |
2895 | xfs_attr_leaf_entry_t *entry; | |
2896 | xfs_attr_leaf_name_remote_t *name_rmt; | |
2897 | xfs_attr_inactive_list_t *list, *lp; | |
2898 | int error, count, size, tmp, i; | |
2899 | ||
2900 | leaf = bp->data; | |
89da0544 | 2901 | ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_ATTR_LEAF_MAGIC); |
1da177e4 LT |
2902 | |
2903 | /* | |
2904 | * Count the number of "remote" value extents. | |
2905 | */ | |
2906 | count = 0; | |
2907 | entry = &leaf->entries[0]; | |
918ae424 | 2908 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
6b19f2d8 NS |
2909 | if (be16_to_cpu(entry->nameidx) && |
2910 | ((entry->flags & XFS_ATTR_LOCAL) == 0)) { | |
1da177e4 LT |
2911 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i); |
2912 | if (name_rmt->valueblk) | |
2913 | count++; | |
2914 | } | |
2915 | } | |
2916 | ||
2917 | /* | |
2918 | * If there are no "remote" values, we're done. | |
2919 | */ | |
2920 | if (count == 0) { | |
2921 | xfs_da_brelse(*trans, bp); | |
2922 | return(0); | |
2923 | } | |
2924 | ||
2925 | /* | |
2926 | * Allocate storage for a list of all the "remote" value extents. | |
2927 | */ | |
2928 | size = count * sizeof(xfs_attr_inactive_list_t); | |
2929 | list = (xfs_attr_inactive_list_t *)kmem_alloc(size, KM_SLEEP); | |
2930 | ||
2931 | /* | |
2932 | * Identify each of the "remote" value extents. | |
2933 | */ | |
2934 | lp = list; | |
2935 | entry = &leaf->entries[0]; | |
918ae424 | 2936 | for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) { |
6b19f2d8 NS |
2937 | if (be16_to_cpu(entry->nameidx) && |
2938 | ((entry->flags & XFS_ATTR_LOCAL) == 0)) { | |
1da177e4 LT |
2939 | name_rmt = XFS_ATTR_LEAF_NAME_REMOTE(leaf, i); |
2940 | if (name_rmt->valueblk) { | |
d7929ff6 NS |
2941 | lp->valueblk = be32_to_cpu(name_rmt->valueblk); |
2942 | lp->valuelen = XFS_B_TO_FSB(dp->i_mount, | |
2943 | be32_to_cpu(name_rmt->valuelen)); | |
1da177e4 LT |
2944 | lp++; |
2945 | } | |
2946 | } | |
2947 | } | |
2948 | xfs_da_brelse(*trans, bp); /* unlock for trans. in freextent() */ | |
2949 | ||
2950 | /* | |
2951 | * Invalidate each of the "remote" value extents. | |
2952 | */ | |
2953 | error = 0; | |
2954 | for (lp = list, i = 0; i < count; i++, lp++) { | |
2955 | tmp = xfs_attr_leaf_freextent(trans, dp, | |
d7929ff6 NS |
2956 | lp->valueblk, lp->valuelen); |
2957 | ||
1da177e4 LT |
2958 | if (error == 0) |
2959 | error = tmp; /* save only the 1st errno */ | |
2960 | } | |
2961 | ||
2962 | kmem_free((xfs_caddr_t)list, size); | |
2963 | return(error); | |
2964 | } | |
2965 | ||
2966 | /* | |
2967 | * Look at all the extents for this logical region, | |
2968 | * invalidate any buffers that are incore/in transactions. | |
2969 | */ | |
ba0f32d4 | 2970 | STATIC int |
1da177e4 LT |
2971 | xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp, |
2972 | xfs_dablk_t blkno, int blkcnt) | |
2973 | { | |
2974 | xfs_bmbt_irec_t map; | |
2975 | xfs_dablk_t tblkno; | |
2976 | int tblkcnt, dblkcnt, nmap, error; | |
2977 | xfs_daddr_t dblkno; | |
2978 | xfs_buf_t *bp; | |
2979 | ||
2980 | /* | |
2981 | * Roll through the "value", invalidating the attribute value's | |
2982 | * blocks. | |
2983 | */ | |
2984 | tblkno = blkno; | |
2985 | tblkcnt = blkcnt; | |
2986 | while (tblkcnt > 0) { | |
2987 | /* | |
2988 | * Try to remember where we decided to put the value. | |
2989 | */ | |
2990 | nmap = 1; | |
2991 | error = xfs_bmapi(*trans, dp, (xfs_fileoff_t)tblkno, tblkcnt, | |
2992 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, | |
3e57ecf6 | 2993 | NULL, 0, &map, &nmap, NULL, NULL); |
1da177e4 LT |
2994 | if (error) { |
2995 | return(error); | |
2996 | } | |
2997 | ASSERT(nmap == 1); | |
2998 | ASSERT(map.br_startblock != DELAYSTARTBLOCK); | |
2999 | ||
3000 | /* | |
3001 | * If it's a hole, these are already unmapped | |
3002 | * so there's nothing to invalidate. | |
3003 | */ | |
3004 | if (map.br_startblock != HOLESTARTBLOCK) { | |
3005 | ||
3006 | dblkno = XFS_FSB_TO_DADDR(dp->i_mount, | |
3007 | map.br_startblock); | |
3008 | dblkcnt = XFS_FSB_TO_BB(dp->i_mount, | |
3009 | map.br_blockcount); | |
3010 | bp = xfs_trans_get_buf(*trans, | |
3011 | dp->i_mount->m_ddev_targp, | |
3012 | dblkno, dblkcnt, XFS_BUF_LOCK); | |
3013 | xfs_trans_binval(*trans, bp); | |
3014 | /* | |
3015 | * Roll to next transaction. | |
3016 | */ | |
3017 | if ((error = xfs_attr_rolltrans(trans, dp))) | |
3018 | return (error); | |
3019 | } | |
3020 | ||
3021 | tblkno += map.br_blockcount; | |
3022 | tblkcnt -= map.br_blockcount; | |
3023 | } | |
3024 | ||
3025 | return(0); | |
3026 | } | |
3027 | ||
3028 | ||
3029 | /* | |
3030 | * Roll from one trans in the sequence of PERMANENT transactions to the next. | |
3031 | */ | |
3032 | int | |
3033 | xfs_attr_rolltrans(xfs_trans_t **transp, xfs_inode_t *dp) | |
3034 | { | |
3035 | xfs_trans_t *trans; | |
3036 | unsigned int logres, count; | |
3037 | int error; | |
3038 | ||
3039 | /* | |
3040 | * Ensure that the inode is always logged. | |
3041 | */ | |
3042 | trans = *transp; | |
3043 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
3044 | ||
3045 | /* | |
3046 | * Copy the critical parameters from one trans to the next. | |
3047 | */ | |
3048 | logres = trans->t_log_res; | |
3049 | count = trans->t_log_count; | |
3050 | *transp = xfs_trans_dup(trans); | |
3051 | ||
3052 | /* | |
3053 | * Commit the current transaction. | |
3054 | * If this commit failed, then it'd just unlock those items that | |
3055 | * are not marked ihold. That also means that a filesystem shutdown | |
3056 | * is in progress. The caller takes the responsibility to cancel | |
3057 | * the duplicate transaction that gets returned. | |
3058 | */ | |
3059 | if ((error = xfs_trans_commit(trans, 0, NULL))) | |
3060 | return (error); | |
3061 | ||
3062 | trans = *transp; | |
3063 | ||
3064 | /* | |
3065 | * Reserve space in the log for th next transaction. | |
3066 | * This also pushes items in the "AIL", the list of logged items, | |
3067 | * out to disk if they are taking up space at the tail of the log | |
3068 | * that we want to use. This requires that either nothing be locked | |
3069 | * across this call, or that anything that is locked be logged in | |
3070 | * the prior and the next transactions. | |
3071 | */ | |
3072 | error = xfs_trans_reserve(trans, 0, logres, 0, | |
3073 | XFS_TRANS_PERM_LOG_RES, count); | |
3074 | /* | |
3075 | * Ensure that the inode is in the new transaction and locked. | |
3076 | */ | |
3077 | if (!error) { | |
3078 | xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL); | |
3079 | xfs_trans_ihold(trans, dp); | |
3080 | } | |
3081 | return (error); | |
3082 | ||
3083 | } |