Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 LT |
22 | #include "xfs_log.h" |
23 | #include "xfs_trans.h" | |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_ag.h" | |
1da177e4 | 26 | #include "xfs_mount.h" |
1da177e4 | 27 | #include "xfs_bmap_btree.h" |
a844f451 | 28 | #include "xfs_alloc_btree.h" |
1da177e4 | 29 | #include "xfs_ialloc_btree.h" |
1da177e4 | 30 | #include "xfs_dinode.h" |
1da177e4 | 31 | #include "xfs_inode.h" |
a844f451 | 32 | #include "xfs_inode_item.h" |
1da177e4 | 33 | #include "xfs_alloc.h" |
a844f451 | 34 | #include "xfs_btree.h" |
a844f451 | 35 | #include "xfs_itable.h" |
1da177e4 LT |
36 | #include "xfs_bmap.h" |
37 | #include "xfs_error.h" | |
38 | #include "xfs_quota.h" | |
3d3e6f64 | 39 | #include "xfs_trace.h" |
ee1a47ab | 40 | #include "xfs_cksum.h" |
1da177e4 | 41 | |
1da177e4 LT |
42 | /* |
43 | * Determine the extent state. | |
44 | */ | |
45 | /* ARGSUSED */ | |
46 | STATIC xfs_exntst_t | |
47 | xfs_extent_state( | |
48 | xfs_filblks_t blks, | |
49 | int extent_flag) | |
50 | { | |
51 | if (extent_flag) { | |
52 | ASSERT(blks != 0); /* saved for DMIG */ | |
53 | return XFS_EXT_UNWRITTEN; | |
54 | } | |
55 | return XFS_EXT_NORM; | |
56 | } | |
57 | ||
1da177e4 LT |
58 | /* |
59 | * Convert on-disk form of btree root to in-memory form. | |
60 | */ | |
61 | void | |
62 | xfs_bmdr_to_bmbt( | |
ee1a47ab | 63 | struct xfs_inode *ip, |
1da177e4 LT |
64 | xfs_bmdr_block_t *dblock, |
65 | int dblocklen, | |
7cc95a82 | 66 | struct xfs_btree_block *rblock, |
1da177e4 LT |
67 | int rblocklen) |
68 | { | |
ee1a47ab | 69 | struct xfs_mount *mp = ip->i_mount; |
1da177e4 LT |
70 | int dmxr; |
71 | xfs_bmbt_key_t *fkp; | |
576039cf | 72 | __be64 *fpp; |
1da177e4 | 73 | xfs_bmbt_key_t *tkp; |
576039cf | 74 | __be64 *tpp; |
1da177e4 | 75 | |
ee1a47ab CH |
76 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
77 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
78 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
79 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
80 | else | |
81 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
82 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
83 | XFS_BTREE_LONG_PTRS); | |
84 | ||
16259e7d CH |
85 | rblock->bb_level = dblock->bb_level; |
86 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
87 | rblock->bb_numrecs = dblock->bb_numrecs; | |
60197e8d | 88 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
136341b4 CH |
89 | fkp = XFS_BMDR_KEY_ADDR(dblock, 1); |
90 | tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); | |
91 | fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); | |
60197e8d | 92 | tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
16259e7d | 93 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 94 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 95 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
96 | } |
97 | ||
1da177e4 LT |
98 | /* |
99 | * Convert a compressed bmap extent record to an uncompressed form. | |
100 | * This code must be in sync with the routines xfs_bmbt_get_startoff, | |
101 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. | |
102 | */ | |
b8f82a4a | 103 | STATIC void |
1da177e4 LT |
104 | __xfs_bmbt_get_all( |
105 | __uint64_t l0, | |
106 | __uint64_t l1, | |
107 | xfs_bmbt_irec_t *s) | |
108 | { | |
109 | int ext_flag; | |
110 | xfs_exntst_t st; | |
111 | ||
112 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
113 | s->br_startoff = ((xfs_fileoff_t)l0 & | |
fb82557f | 114 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 | 115 | #if XFS_BIG_BLKNOS |
fb82557f | 116 | s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 LT |
117 | (((xfs_fsblock_t)l1) >> 21); |
118 | #else | |
119 | #ifdef DEBUG | |
120 | { | |
121 | xfs_dfsbno_t b; | |
122 | ||
fb82557f | 123 | b = (((xfs_dfsbno_t)l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 124 | (((xfs_dfsbno_t)l1) >> 21); |
9d87c319 | 125 | ASSERT((b >> 32) == 0 || isnulldstartblock(b)); |
1da177e4 LT |
126 | s->br_startblock = (xfs_fsblock_t)b; |
127 | } | |
128 | #else /* !DEBUG */ | |
129 | s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21); | |
130 | #endif /* DEBUG */ | |
131 | #endif /* XFS_BIG_BLKNOS */ | |
fb82557f | 132 | s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21)); |
1da177e4 LT |
133 | /* This is xfs_extent_state() in-line */ |
134 | if (ext_flag) { | |
135 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ | |
136 | st = XFS_EXT_UNWRITTEN; | |
137 | } else | |
138 | st = XFS_EXT_NORM; | |
139 | s->br_state = st; | |
140 | } | |
141 | ||
142 | void | |
143 | xfs_bmbt_get_all( | |
a6f64d4a | 144 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
145 | xfs_bmbt_irec_t *s) |
146 | { | |
147 | __xfs_bmbt_get_all(r->l0, r->l1, s); | |
148 | } | |
149 | ||
1da177e4 LT |
150 | /* |
151 | * Extract the blockcount field from an in memory bmap extent record. | |
152 | */ | |
153 | xfs_filblks_t | |
154 | xfs_bmbt_get_blockcount( | |
a6f64d4a | 155 | xfs_bmbt_rec_host_t *r) |
1da177e4 | 156 | { |
fb82557f | 157 | return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21)); |
1da177e4 LT |
158 | } |
159 | ||
160 | /* | |
161 | * Extract the startblock field from an in memory bmap extent record. | |
162 | */ | |
163 | xfs_fsblock_t | |
164 | xfs_bmbt_get_startblock( | |
a6f64d4a | 165 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
166 | { |
167 | #if XFS_BIG_BLKNOS | |
fb82557f | 168 | return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 LT |
169 | (((xfs_fsblock_t)r->l1) >> 21); |
170 | #else | |
171 | #ifdef DEBUG | |
172 | xfs_dfsbno_t b; | |
173 | ||
fb82557f | 174 | b = (((xfs_dfsbno_t)r->l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 175 | (((xfs_dfsbno_t)r->l1) >> 21); |
9d87c319 | 176 | ASSERT((b >> 32) == 0 || isnulldstartblock(b)); |
1da177e4 LT |
177 | return (xfs_fsblock_t)b; |
178 | #else /* !DEBUG */ | |
179 | return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21); | |
180 | #endif /* DEBUG */ | |
181 | #endif /* XFS_BIG_BLKNOS */ | |
182 | } | |
183 | ||
184 | /* | |
185 | * Extract the startoff field from an in memory bmap extent record. | |
186 | */ | |
187 | xfs_fileoff_t | |
188 | xfs_bmbt_get_startoff( | |
a6f64d4a | 189 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
190 | { |
191 | return ((xfs_fileoff_t)r->l0 & | |
fb82557f | 192 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 LT |
193 | } |
194 | ||
195 | xfs_exntst_t | |
196 | xfs_bmbt_get_state( | |
a6f64d4a | 197 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
198 | { |
199 | int ext_flag; | |
200 | ||
201 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
202 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), | |
203 | ext_flag); | |
204 | } | |
205 | ||
1da177e4 LT |
206 | /* |
207 | * Extract the blockcount field from an on disk bmap extent record. | |
208 | */ | |
209 | xfs_filblks_t | |
210 | xfs_bmbt_disk_get_blockcount( | |
211 | xfs_bmbt_rec_t *r) | |
212 | { | |
fb82557f | 213 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21)); |
1da177e4 LT |
214 | } |
215 | ||
1da177e4 LT |
216 | /* |
217 | * Extract the startoff field from a disk format bmap extent record. | |
218 | */ | |
219 | xfs_fileoff_t | |
220 | xfs_bmbt_disk_get_startoff( | |
221 | xfs_bmbt_rec_t *r) | |
222 | { | |
cd8b0a97 | 223 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
fb82557f | 224 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 | 225 | } |
1da177e4 | 226 | |
1da177e4 | 227 | |
1da177e4 LT |
228 | /* |
229 | * Set all the fields in a bmap extent record from the arguments. | |
230 | */ | |
231 | void | |
232 | xfs_bmbt_set_allf( | |
8cba4344 CH |
233 | xfs_bmbt_rec_host_t *r, |
234 | xfs_fileoff_t startoff, | |
235 | xfs_fsblock_t startblock, | |
236 | xfs_filblks_t blockcount, | |
237 | xfs_exntst_t state) | |
1da177e4 | 238 | { |
8cba4344 CH |
239 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
240 | ||
241 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
242 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
243 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 244 | |
1da177e4 | 245 | #if XFS_BIG_BLKNOS |
fb82557f | 246 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 247 | |
1da177e4 | 248 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 CH |
249 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
250 | ((xfs_bmbt_rec_base_t)startblock >> 43); | |
251 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
252 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 253 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 | 254 | #else /* !XFS_BIG_BLKNOS */ |
9d87c319 | 255 | if (isnullstartblock(startblock)) { |
1da177e4 | 256 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 | 257 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
fb82557f ES |
258 | (xfs_bmbt_rec_base_t)xfs_mask64lo(9); |
259 | r->l1 = xfs_mask64hi(11) | | |
8cba4344 CH |
260 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
261 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 262 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
263 | } else { |
264 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
8cba4344 CH |
265 | ((xfs_bmbt_rec_base_t)startoff << 9); |
266 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
267 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 268 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
269 | } |
270 | #endif /* XFS_BIG_BLKNOS */ | |
271 | } | |
272 | ||
1da177e4 LT |
273 | /* |
274 | * Set all the fields in a bmap extent record from the uncompressed form. | |
275 | */ | |
276 | void | |
8cba4344 CH |
277 | xfs_bmbt_set_all( |
278 | xfs_bmbt_rec_host_t *r, | |
279 | xfs_bmbt_irec_t *s) | |
1da177e4 | 280 | { |
8cba4344 CH |
281 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
282 | s->br_blockcount, s->br_state); | |
1da177e4 LT |
283 | } |
284 | ||
8cba4344 | 285 | |
1da177e4 LT |
286 | /* |
287 | * Set all the fields in a disk format bmap extent record from the arguments. | |
288 | */ | |
289 | void | |
290 | xfs_bmbt_disk_set_allf( | |
8cba4344 CH |
291 | xfs_bmbt_rec_t *r, |
292 | xfs_fileoff_t startoff, | |
293 | xfs_fsblock_t startblock, | |
294 | xfs_filblks_t blockcount, | |
295 | xfs_exntst_t state) | |
1da177e4 | 296 | { |
8cba4344 CH |
297 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
298 | ||
299 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
300 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
301 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 302 | |
1da177e4 | 303 | #if XFS_BIG_BLKNOS |
fb82557f | 304 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 305 | |
cd8b0a97 | 306 | r->l0 = cpu_to_be64( |
8cba4344 CH |
307 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
308 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
309 | ((xfs_bmbt_rec_base_t)startblock >> 43)); | |
cd8b0a97 | 310 | r->l1 = cpu_to_be64( |
8cba4344 CH |
311 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
312 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 313 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 | 314 | #else /* !XFS_BIG_BLKNOS */ |
9d87c319 | 315 | if (isnullstartblock(startblock)) { |
cd8b0a97 | 316 | r->l0 = cpu_to_be64( |
8cba4344 CH |
317 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
318 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
fb82557f ES |
319 | (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); |
320 | r->l1 = cpu_to_be64(xfs_mask64hi(11) | | |
8cba4344 CH |
321 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
322 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 323 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 | 324 | } else { |
cd8b0a97 | 325 | r->l0 = cpu_to_be64( |
8cba4344 CH |
326 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
327 | ((xfs_bmbt_rec_base_t)startoff << 9)); | |
cd8b0a97 | 328 | r->l1 = cpu_to_be64( |
8cba4344 CH |
329 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
330 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 331 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 LT |
332 | } |
333 | #endif /* XFS_BIG_BLKNOS */ | |
334 | } | |
8cba4344 CH |
335 | |
336 | /* | |
337 | * Set all the fields in a bmap extent record from the uncompressed form. | |
338 | */ | |
5d77c0dc | 339 | STATIC void |
8cba4344 CH |
340 | xfs_bmbt_disk_set_all( |
341 | xfs_bmbt_rec_t *r, | |
342 | xfs_bmbt_irec_t *s) | |
343 | { | |
344 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, | |
345 | s->br_blockcount, s->br_state); | |
346 | } | |
1da177e4 LT |
347 | |
348 | /* | |
349 | * Set the blockcount field in a bmap extent record. | |
350 | */ | |
351 | void | |
352 | xfs_bmbt_set_blockcount( | |
a6f64d4a | 353 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
354 | xfs_filblks_t v) |
355 | { | |
fb82557f ES |
356 | ASSERT((v & xfs_mask64hi(43)) == 0); |
357 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) | | |
358 | (xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21)); | |
1da177e4 LT |
359 | } |
360 | ||
361 | /* | |
362 | * Set the startblock field in a bmap extent record. | |
363 | */ | |
364 | void | |
365 | xfs_bmbt_set_startblock( | |
a6f64d4a | 366 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
367 | xfs_fsblock_t v) |
368 | { | |
369 | #if XFS_BIG_BLKNOS | |
fb82557f ES |
370 | ASSERT((v & xfs_mask64hi(12)) == 0); |
371 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) | | |
1da177e4 | 372 | (xfs_bmbt_rec_base_t)(v >> 43); |
fb82557f | 373 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) | |
1da177e4 LT |
374 | (xfs_bmbt_rec_base_t)(v << 21); |
375 | #else /* !XFS_BIG_BLKNOS */ | |
9d87c319 | 376 | if (isnullstartblock(v)) { |
fb82557f ES |
377 | r->l0 |= (xfs_bmbt_rec_base_t)xfs_mask64lo(9); |
378 | r->l1 = (xfs_bmbt_rec_base_t)xfs_mask64hi(11) | | |
1da177e4 | 379 | ((xfs_bmbt_rec_base_t)v << 21) | |
fb82557f | 380 | (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 | 381 | } else { |
fb82557f | 382 | r->l0 &= ~(xfs_bmbt_rec_base_t)xfs_mask64lo(9); |
1da177e4 | 383 | r->l1 = ((xfs_bmbt_rec_base_t)v << 21) | |
fb82557f | 384 | (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
385 | } |
386 | #endif /* XFS_BIG_BLKNOS */ | |
387 | } | |
388 | ||
389 | /* | |
390 | * Set the startoff field in a bmap extent record. | |
391 | */ | |
392 | void | |
393 | xfs_bmbt_set_startoff( | |
a6f64d4a | 394 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
395 | xfs_fileoff_t v) |
396 | { | |
fb82557f ES |
397 | ASSERT((v & xfs_mask64hi(9)) == 0); |
398 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) | | |
1da177e4 | 399 | ((xfs_bmbt_rec_base_t)v << 9) | |
fb82557f | 400 | (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); |
1da177e4 LT |
401 | } |
402 | ||
403 | /* | |
404 | * Set the extent state field in a bmap extent record. | |
405 | */ | |
406 | void | |
407 | xfs_bmbt_set_state( | |
a6f64d4a | 408 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
409 | xfs_exntst_t v) |
410 | { | |
411 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); | |
412 | if (v == XFS_EXT_NORM) | |
fb82557f | 413 | r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN); |
1da177e4 | 414 | else |
fb82557f | 415 | r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN); |
1da177e4 LT |
416 | } |
417 | ||
418 | /* | |
419 | * Convert in-memory form of btree root to on-disk form. | |
420 | */ | |
421 | void | |
422 | xfs_bmbt_to_bmdr( | |
60197e8d | 423 | struct xfs_mount *mp, |
7cc95a82 | 424 | struct xfs_btree_block *rblock, |
1da177e4 LT |
425 | int rblocklen, |
426 | xfs_bmdr_block_t *dblock, | |
427 | int dblocklen) | |
428 | { | |
429 | int dmxr; | |
430 | xfs_bmbt_key_t *fkp; | |
576039cf | 431 | __be64 *fpp; |
1da177e4 | 432 | xfs_bmbt_key_t *tkp; |
576039cf | 433 | __be64 *tpp; |
1da177e4 | 434 | |
ee1a47ab CH |
435 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
436 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_CRC_MAGIC)); | |
437 | ASSERT(uuid_equal(&rblock->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid)); | |
438 | ASSERT(rblock->bb_u.l.bb_blkno == | |
439 | cpu_to_be64(XFS_BUF_DADDR_NULL)); | |
440 | } else | |
441 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC)); | |
69ef921b CH |
442 | ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO)); |
443 | ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO)); | |
444 | ASSERT(rblock->bb_level != 0); | |
16259e7d CH |
445 | dblock->bb_level = rblock->bb_level; |
446 | dblock->bb_numrecs = rblock->bb_numrecs; | |
60197e8d | 447 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
136341b4 CH |
448 | fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); |
449 | tkp = XFS_BMDR_KEY_ADDR(dblock, 1); | |
60197e8d | 450 | fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
136341b4 | 451 | tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); |
16259e7d | 452 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 453 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 454 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
455 | } |
456 | ||
1da177e4 | 457 | /* |
4eea22f0 | 458 | * Check extent records, which have just been read, for |
1da177e4 LT |
459 | * any bit in the extent flag field. ASSERT on debug |
460 | * kernels, as this condition should not occur. | |
461 | * Return an error condition (1) if any flags found, | |
462 | * otherwise return 0. | |
463 | */ | |
464 | ||
465 | int | |
466 | xfs_check_nostate_extents( | |
4eea22f0 MK |
467 | xfs_ifork_t *ifp, |
468 | xfs_extnum_t idx, | |
1da177e4 LT |
469 | xfs_extnum_t num) |
470 | { | |
4eea22f0 | 471 | for (; num > 0; num--, idx++) { |
a6f64d4a | 472 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
473 | if ((ep->l0 >> |
474 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { | |
475 | ASSERT(0); | |
476 | return 1; | |
477 | } | |
478 | } | |
479 | return 0; | |
480 | } | |
561f7d17 CH |
481 | |
482 | ||
483 | STATIC struct xfs_btree_cur * | |
484 | xfs_bmbt_dup_cursor( | |
485 | struct xfs_btree_cur *cur) | |
486 | { | |
487 | struct xfs_btree_cur *new; | |
488 | ||
489 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
490 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); | |
491 | ||
492 | /* | |
493 | * Copy the firstblock, flist, and flags values, | |
494 | * since init cursor doesn't get them. | |
495 | */ | |
496 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; | |
497 | new->bc_private.b.flist = cur->bc_private.b.flist; | |
498 | new->bc_private.b.flags = cur->bc_private.b.flags; | |
499 | ||
500 | return new; | |
501 | } | |
502 | ||
4b22a571 CH |
503 | STATIC void |
504 | xfs_bmbt_update_cursor( | |
505 | struct xfs_btree_cur *src, | |
506 | struct xfs_btree_cur *dst) | |
507 | { | |
508 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || | |
509 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); | |
510 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); | |
511 | ||
512 | dst->bc_private.b.allocated += src->bc_private.b.allocated; | |
513 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; | |
514 | ||
515 | src->bc_private.b.allocated = 0; | |
516 | } | |
517 | ||
f5eb8e7c CH |
518 | STATIC int |
519 | xfs_bmbt_alloc_block( | |
520 | struct xfs_btree_cur *cur, | |
521 | union xfs_btree_ptr *start, | |
522 | union xfs_btree_ptr *new, | |
523 | int length, | |
524 | int *stat) | |
525 | { | |
526 | xfs_alloc_arg_t args; /* block allocation args */ | |
527 | int error; /* error return value */ | |
528 | ||
529 | memset(&args, 0, sizeof(args)); | |
530 | args.tp = cur->bc_tp; | |
531 | args.mp = cur->bc_mp; | |
532 | args.fsbno = cur->bc_private.b.firstblock; | |
533 | args.firstblock = args.fsbno; | |
534 | ||
535 | if (args.fsbno == NULLFSBLOCK) { | |
536 | args.fsbno = be64_to_cpu(start->l); | |
537 | args.type = XFS_ALLOCTYPE_START_BNO; | |
538 | /* | |
539 | * Make sure there is sufficient room left in the AG to | |
540 | * complete a full tree split for an extent insert. If | |
541 | * we are converting the middle part of an extent then | |
542 | * we may need space for two tree splits. | |
543 | * | |
544 | * We are relying on the caller to make the correct block | |
545 | * reservation for this operation to succeed. If the | |
546 | * reservation amount is insufficient then we may fail a | |
547 | * block allocation here and corrupt the filesystem. | |
548 | */ | |
549 | args.minleft = xfs_trans_get_block_res(args.tp); | |
550 | } else if (cur->bc_private.b.flist->xbf_low) { | |
551 | args.type = XFS_ALLOCTYPE_START_BNO; | |
552 | } else { | |
553 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
554 | } | |
555 | ||
556 | args.minlen = args.maxlen = args.prod = 1; | |
557 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; | |
558 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { | |
559 | error = XFS_ERROR(ENOSPC); | |
560 | goto error0; | |
561 | } | |
562 | error = xfs_alloc_vextent(&args); | |
563 | if (error) | |
564 | goto error0; | |
565 | ||
566 | if (args.fsbno == NULLFSBLOCK && args.minleft) { | |
567 | /* | |
568 | * Could not find an AG with enough free space to satisfy | |
569 | * a full btree split. Try again without minleft and if | |
570 | * successful activate the lowspace algorithm. | |
571 | */ | |
572 | args.fsbno = 0; | |
573 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
574 | args.minleft = 0; | |
575 | error = xfs_alloc_vextent(&args); | |
576 | if (error) | |
577 | goto error0; | |
578 | cur->bc_private.b.flist->xbf_low = 1; | |
579 | } | |
580 | if (args.fsbno == NULLFSBLOCK) { | |
581 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
582 | *stat = 0; | |
583 | return 0; | |
584 | } | |
585 | ASSERT(args.len == 1); | |
586 | cur->bc_private.b.firstblock = args.fsbno; | |
587 | cur->bc_private.b.allocated++; | |
588 | cur->bc_private.b.ip->i_d.di_nblocks++; | |
589 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); | |
7d095257 | 590 | xfs_trans_mod_dquot_byino(args.tp, cur->bc_private.b.ip, |
f5eb8e7c CH |
591 | XFS_TRANS_DQ_BCOUNT, 1L); |
592 | ||
593 | new->l = cpu_to_be64(args.fsbno); | |
594 | ||
595 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
596 | *stat = 1; | |
597 | return 0; | |
598 | ||
599 | error0: | |
600 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
601 | return error; | |
602 | } | |
603 | ||
d4b3a4b7 CH |
604 | STATIC int |
605 | xfs_bmbt_free_block( | |
606 | struct xfs_btree_cur *cur, | |
607 | struct xfs_buf *bp) | |
608 | { | |
609 | struct xfs_mount *mp = cur->bc_mp; | |
610 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
611 | struct xfs_trans *tp = cur->bc_tp; | |
612 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); | |
613 | ||
614 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); | |
615 | ip->i_d.di_nblocks--; | |
616 | ||
617 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
7d095257 | 618 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
d4b3a4b7 CH |
619 | xfs_trans_binval(tp, bp); |
620 | return 0; | |
621 | } | |
622 | ||
91cca5df CH |
623 | STATIC int |
624 | xfs_bmbt_get_minrecs( | |
625 | struct xfs_btree_cur *cur, | |
626 | int level) | |
627 | { | |
60197e8d CH |
628 | if (level == cur->bc_nlevels - 1) { |
629 | struct xfs_ifork *ifp; | |
630 | ||
631 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
632 | cur->bc_private.b.whichfork); | |
633 | ||
634 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
635 | ifp->if_broot_bytes, level == 0) / 2; | |
636 | } | |
637 | ||
638 | return cur->bc_mp->m_bmap_dmnr[level != 0]; | |
91cca5df CH |
639 | } |
640 | ||
60197e8d | 641 | int |
ce5e42db CH |
642 | xfs_bmbt_get_maxrecs( |
643 | struct xfs_btree_cur *cur, | |
644 | int level) | |
645 | { | |
60197e8d CH |
646 | if (level == cur->bc_nlevels - 1) { |
647 | struct xfs_ifork *ifp; | |
648 | ||
649 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
650 | cur->bc_private.b.whichfork); | |
651 | ||
652 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
653 | ifp->if_broot_bytes, level == 0); | |
654 | } | |
655 | ||
656 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
657 | ||
ce5e42db CH |
658 | } |
659 | ||
4b22a571 CH |
660 | /* |
661 | * Get the maximum records we could store in the on-disk format. | |
662 | * | |
663 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but | |
664 | * for the root node this checks the available space in the dinode fork | |
665 | * so that we can resize the in-memory buffer to match it. After a | |
666 | * resize to the maximum size this function returns the same value | |
667 | * as xfs_bmbt_get_maxrecs for the root node, too. | |
668 | */ | |
669 | STATIC int | |
670 | xfs_bmbt_get_dmaxrecs( | |
671 | struct xfs_btree_cur *cur, | |
672 | int level) | |
673 | { | |
60197e8d CH |
674 | if (level != cur->bc_nlevels - 1) |
675 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
676 | return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize, | |
677 | level == 0); | |
4b22a571 CH |
678 | } |
679 | ||
fe033cc8 CH |
680 | STATIC void |
681 | xfs_bmbt_init_key_from_rec( | |
682 | union xfs_btree_key *key, | |
683 | union xfs_btree_rec *rec) | |
684 | { | |
685 | key->bmbt.br_startoff = | |
686 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); | |
687 | } | |
688 | ||
4b22a571 CH |
689 | STATIC void |
690 | xfs_bmbt_init_rec_from_key( | |
691 | union xfs_btree_key *key, | |
692 | union xfs_btree_rec *rec) | |
693 | { | |
694 | ASSERT(key->bmbt.br_startoff != 0); | |
695 | ||
696 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), | |
697 | 0, 0, XFS_EXT_NORM); | |
698 | } | |
699 | ||
700 | STATIC void | |
701 | xfs_bmbt_init_rec_from_cur( | |
702 | struct xfs_btree_cur *cur, | |
703 | union xfs_btree_rec *rec) | |
704 | { | |
705 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); | |
706 | } | |
707 | ||
fe033cc8 CH |
708 | STATIC void |
709 | xfs_bmbt_init_ptr_from_cur( | |
710 | struct xfs_btree_cur *cur, | |
711 | union xfs_btree_ptr *ptr) | |
712 | { | |
713 | ptr->l = 0; | |
714 | } | |
715 | ||
716 | STATIC __int64_t | |
717 | xfs_bmbt_key_diff( | |
718 | struct xfs_btree_cur *cur, | |
719 | union xfs_btree_key *key) | |
720 | { | |
721 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - | |
722 | cur->bc_rec.b.br_startoff; | |
723 | } | |
724 | ||
ee1a47ab | 725 | static int |
612cfbfe | 726 | xfs_bmbt_verify( |
3d3e6f64 DC |
727 | struct xfs_buf *bp) |
728 | { | |
729 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
730 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
731 | unsigned int level; | |
3d3e6f64 | 732 | |
ee1a47ab CH |
733 | switch (block->bb_magic) { |
734 | case cpu_to_be32(XFS_BMAP_CRC_MAGIC): | |
735 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
736 | return false; | |
737 | if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid)) | |
738 | return false; | |
739 | if (be64_to_cpu(block->bb_u.l.bb_blkno) != bp->b_bn) | |
740 | return false; | |
741 | /* | |
742 | * XXX: need a better way of verifying the owner here. Right now | |
743 | * just make sure there has been one set. | |
744 | */ | |
745 | if (be64_to_cpu(block->bb_u.l.bb_owner) == 0) | |
746 | return false; | |
747 | /* fall through */ | |
748 | case cpu_to_be32(XFS_BMAP_MAGIC): | |
749 | break; | |
750 | default: | |
751 | return false; | |
752 | } | |
753 | ||
754 | /* | |
755 | * numrecs and level verification. | |
3d3e6f64 | 756 | * |
ee1a47ab | 757 | * We don't know what fork we belong to, so just verify that the level |
3d3e6f64 DC |
758 | * is less than the maximum of the two. Later checks will be more |
759 | * precise. | |
760 | */ | |
761 | level = be16_to_cpu(block->bb_level); | |
ee1a47ab CH |
762 | if (level > max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1])) |
763 | return false; | |
764 | if (be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0]) | |
765 | return false; | |
3d3e6f64 DC |
766 | |
767 | /* sibling pointer verification */ | |
ee1a47ab CH |
768 | if (!block->bb_u.l.bb_leftsib || |
769 | (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLDFSBNO) && | |
770 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib)))) | |
771 | return false; | |
772 | if (!block->bb_u.l.bb_rightsib || | |
773 | (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLDFSBNO) && | |
774 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib)))) | |
775 | return false; | |
776 | ||
777 | return true; | |
778 | ||
612cfbfe | 779 | } |
3d3e6f64 | 780 | |
1813dd64 DC |
781 | static void |
782 | xfs_bmbt_read_verify( | |
612cfbfe DC |
783 | struct xfs_buf *bp) |
784 | { | |
ee1a47ab CH |
785 | if (!(xfs_btree_lblock_verify_crc(bp) && |
786 | xfs_bmbt_verify(bp))) { | |
787 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
788 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, | |
789 | bp->b_target->bt_mount, bp->b_addr); | |
790 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
791 | } | |
792 | ||
612cfbfe DC |
793 | } |
794 | ||
1813dd64 DC |
795 | static void |
796 | xfs_bmbt_write_verify( | |
612cfbfe DC |
797 | struct xfs_buf *bp) |
798 | { | |
ee1a47ab CH |
799 | if (!xfs_bmbt_verify(bp)) { |
800 | xfs_warn(bp->b_target->bt_mount, "bmbt daddr 0x%llx failed", bp->b_bn); | |
801 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
802 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, | |
803 | bp->b_target->bt_mount, bp->b_addr); | |
804 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
805 | return; | |
806 | } | |
807 | xfs_btree_lblock_calc_crc(bp); | |
3d3e6f64 DC |
808 | } |
809 | ||
1813dd64 DC |
810 | const struct xfs_buf_ops xfs_bmbt_buf_ops = { |
811 | .verify_read = xfs_bmbt_read_verify, | |
812 | .verify_write = xfs_bmbt_write_verify, | |
813 | }; | |
814 | ||
815 | ||
742ae1e3 | 816 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
817 | STATIC int |
818 | xfs_bmbt_keys_inorder( | |
819 | struct xfs_btree_cur *cur, | |
820 | union xfs_btree_key *k1, | |
821 | union xfs_btree_key *k2) | |
822 | { | |
823 | return be64_to_cpu(k1->bmbt.br_startoff) < | |
824 | be64_to_cpu(k2->bmbt.br_startoff); | |
825 | } | |
826 | ||
827 | STATIC int | |
828 | xfs_bmbt_recs_inorder( | |
829 | struct xfs_btree_cur *cur, | |
830 | union xfs_btree_rec *r1, | |
831 | union xfs_btree_rec *r2) | |
832 | { | |
833 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + | |
834 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= | |
835 | xfs_bmbt_disk_get_startoff(&r2->bmbt); | |
836 | } | |
837 | #endif /* DEBUG */ | |
838 | ||
561f7d17 | 839 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
65f1eaea CH |
840 | .rec_len = sizeof(xfs_bmbt_rec_t), |
841 | .key_len = sizeof(xfs_bmbt_key_t), | |
842 | ||
561f7d17 | 843 | .dup_cursor = xfs_bmbt_dup_cursor, |
4b22a571 | 844 | .update_cursor = xfs_bmbt_update_cursor, |
f5eb8e7c | 845 | .alloc_block = xfs_bmbt_alloc_block, |
d4b3a4b7 | 846 | .free_block = xfs_bmbt_free_block, |
ce5e42db | 847 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
91cca5df | 848 | .get_minrecs = xfs_bmbt_get_minrecs, |
4b22a571 | 849 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
fe033cc8 | 850 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
4b22a571 CH |
851 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, |
852 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, | |
fe033cc8 CH |
853 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
854 | .key_diff = xfs_bmbt_key_diff, | |
1813dd64 | 855 | .buf_ops = &xfs_bmbt_buf_ops, |
742ae1e3 | 856 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
857 | .keys_inorder = xfs_bmbt_keys_inorder, |
858 | .recs_inorder = xfs_bmbt_recs_inorder, | |
859 | #endif | |
561f7d17 CH |
860 | }; |
861 | ||
862 | /* | |
863 | * Allocate a new bmap btree cursor. | |
864 | */ | |
865 | struct xfs_btree_cur * /* new bmap btree cursor */ | |
866 | xfs_bmbt_init_cursor( | |
867 | struct xfs_mount *mp, /* file system mount point */ | |
868 | struct xfs_trans *tp, /* transaction pointer */ | |
869 | struct xfs_inode *ip, /* inode owning the btree */ | |
870 | int whichfork) /* data or attr fork */ | |
871 | { | |
872 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
873 | struct xfs_btree_cur *cur; | |
874 | ||
875 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
876 | ||
877 | cur->bc_tp = tp; | |
878 | cur->bc_mp = mp; | |
879 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
880 | cur->bc_btnum = XFS_BTNUM_BMAP; | |
881 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
882 | ||
883 | cur->bc_ops = &xfs_bmbt_ops; | |
e99ab90d | 884 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
ee1a47ab CH |
885 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
886 | cur->bc_flags |= XFS_BTREE_CRC_BLOCKS; | |
561f7d17 CH |
887 | |
888 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); | |
889 | cur->bc_private.b.ip = ip; | |
890 | cur->bc_private.b.firstblock = NULLFSBLOCK; | |
891 | cur->bc_private.b.flist = NULL; | |
892 | cur->bc_private.b.allocated = 0; | |
893 | cur->bc_private.b.flags = 0; | |
894 | cur->bc_private.b.whichfork = whichfork; | |
895 | ||
896 | return cur; | |
897 | } | |
60197e8d CH |
898 | |
899 | /* | |
900 | * Calculate number of records in a bmap btree block. | |
901 | */ | |
902 | int | |
903 | xfs_bmbt_maxrecs( | |
904 | struct xfs_mount *mp, | |
905 | int blocklen, | |
906 | int leaf) | |
907 | { | |
7cc95a82 | 908 | blocklen -= XFS_BMBT_BLOCK_LEN(mp); |
60197e8d CH |
909 | |
910 | if (leaf) | |
911 | return blocklen / sizeof(xfs_bmbt_rec_t); | |
912 | return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)); | |
913 | } | |
914 | ||
915 | /* | |
916 | * Calculate number of records in a bmap btree inode root. | |
917 | */ | |
918 | int | |
919 | xfs_bmdr_maxrecs( | |
920 | struct xfs_mount *mp, | |
921 | int blocklen, | |
922 | int leaf) | |
923 | { | |
924 | blocklen -= sizeof(xfs_bmdr_block_t); | |
925 | ||
926 | if (leaf) | |
927 | return blocklen / sizeof(xfs_bmdr_rec_t); | |
928 | return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t)); | |
929 | } |