Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
6ca1c906 | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
a844f451 | 23 | #include "xfs_bit.h" |
1da177e4 LT |
24 | #include "xfs_sb.h" |
25 | #include "xfs_ag.h" | |
1da177e4 | 26 | #include "xfs_mount.h" |
1da177e4 | 27 | #include "xfs_inode.h" |
239880ef | 28 | #include "xfs_trans.h" |
a844f451 | 29 | #include "xfs_inode_item.h" |
1da177e4 | 30 | #include "xfs_alloc.h" |
a844f451 | 31 | #include "xfs_btree.h" |
a4fbe6ab | 32 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
33 | #include "xfs_bmap.h" |
34 | #include "xfs_error.h" | |
35 | #include "xfs_quota.h" | |
3d3e6f64 | 36 | #include "xfs_trace.h" |
ee1a47ab | 37 | #include "xfs_cksum.h" |
a4fbe6ab | 38 | #include "xfs_dinode.h" |
1da177e4 | 39 | |
1da177e4 LT |
40 | /* |
41 | * Determine the extent state. | |
42 | */ | |
43 | /* ARGSUSED */ | |
44 | STATIC xfs_exntst_t | |
45 | xfs_extent_state( | |
46 | xfs_filblks_t blks, | |
47 | int extent_flag) | |
48 | { | |
49 | if (extent_flag) { | |
50 | ASSERT(blks != 0); /* saved for DMIG */ | |
51 | return XFS_EXT_UNWRITTEN; | |
52 | } | |
53 | return XFS_EXT_NORM; | |
54 | } | |
55 | ||
1da177e4 LT |
56 | /* |
57 | * Convert on-disk form of btree root to in-memory form. | |
58 | */ | |
59 | void | |
60 | xfs_bmdr_to_bmbt( | |
ee1a47ab | 61 | struct xfs_inode *ip, |
1da177e4 LT |
62 | xfs_bmdr_block_t *dblock, |
63 | int dblocklen, | |
7cc95a82 | 64 | struct xfs_btree_block *rblock, |
1da177e4 LT |
65 | int rblocklen) |
66 | { | |
ee1a47ab | 67 | struct xfs_mount *mp = ip->i_mount; |
1da177e4 LT |
68 | int dmxr; |
69 | xfs_bmbt_key_t *fkp; | |
576039cf | 70 | __be64 *fpp; |
1da177e4 | 71 | xfs_bmbt_key_t *tkp; |
576039cf | 72 | __be64 *tpp; |
1da177e4 | 73 | |
ee1a47ab CH |
74 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
75 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
76 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
77 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
78 | else | |
79 | xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL, | |
80 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
81 | XFS_BTREE_LONG_PTRS); | |
82 | ||
16259e7d CH |
83 | rblock->bb_level = dblock->bb_level; |
84 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
85 | rblock->bb_numrecs = dblock->bb_numrecs; | |
60197e8d | 86 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
136341b4 CH |
87 | fkp = XFS_BMDR_KEY_ADDR(dblock, 1); |
88 | tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); | |
89 | fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); | |
60197e8d | 90 | tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
16259e7d | 91 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 92 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 93 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
94 | } |
95 | ||
1da177e4 LT |
96 | /* |
97 | * Convert a compressed bmap extent record to an uncompressed form. | |
98 | * This code must be in sync with the routines xfs_bmbt_get_startoff, | |
99 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. | |
100 | */ | |
b8f82a4a | 101 | STATIC void |
1da177e4 LT |
102 | __xfs_bmbt_get_all( |
103 | __uint64_t l0, | |
104 | __uint64_t l1, | |
105 | xfs_bmbt_irec_t *s) | |
106 | { | |
107 | int ext_flag; | |
108 | xfs_exntst_t st; | |
109 | ||
110 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
111 | s->br_startoff = ((xfs_fileoff_t)l0 & | |
fb82557f | 112 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 | 113 | #if XFS_BIG_BLKNOS |
fb82557f | 114 | s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 LT |
115 | (((xfs_fsblock_t)l1) >> 21); |
116 | #else | |
117 | #ifdef DEBUG | |
118 | { | |
119 | xfs_dfsbno_t b; | |
120 | ||
fb82557f | 121 | b = (((xfs_dfsbno_t)l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 122 | (((xfs_dfsbno_t)l1) >> 21); |
9d87c319 | 123 | ASSERT((b >> 32) == 0 || isnulldstartblock(b)); |
1da177e4 LT |
124 | s->br_startblock = (xfs_fsblock_t)b; |
125 | } | |
126 | #else /* !DEBUG */ | |
127 | s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21); | |
128 | #endif /* DEBUG */ | |
129 | #endif /* XFS_BIG_BLKNOS */ | |
fb82557f | 130 | s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21)); |
1da177e4 LT |
131 | /* This is xfs_extent_state() in-line */ |
132 | if (ext_flag) { | |
133 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ | |
134 | st = XFS_EXT_UNWRITTEN; | |
135 | } else | |
136 | st = XFS_EXT_NORM; | |
137 | s->br_state = st; | |
138 | } | |
139 | ||
140 | void | |
141 | xfs_bmbt_get_all( | |
a6f64d4a | 142 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
143 | xfs_bmbt_irec_t *s) |
144 | { | |
145 | __xfs_bmbt_get_all(r->l0, r->l1, s); | |
146 | } | |
147 | ||
1da177e4 LT |
148 | /* |
149 | * Extract the blockcount field from an in memory bmap extent record. | |
150 | */ | |
151 | xfs_filblks_t | |
152 | xfs_bmbt_get_blockcount( | |
a6f64d4a | 153 | xfs_bmbt_rec_host_t *r) |
1da177e4 | 154 | { |
fb82557f | 155 | return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21)); |
1da177e4 LT |
156 | } |
157 | ||
158 | /* | |
159 | * Extract the startblock field from an in memory bmap extent record. | |
160 | */ | |
161 | xfs_fsblock_t | |
162 | xfs_bmbt_get_startblock( | |
a6f64d4a | 163 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
164 | { |
165 | #if XFS_BIG_BLKNOS | |
fb82557f | 166 | return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 LT |
167 | (((xfs_fsblock_t)r->l1) >> 21); |
168 | #else | |
169 | #ifdef DEBUG | |
170 | xfs_dfsbno_t b; | |
171 | ||
fb82557f | 172 | b = (((xfs_dfsbno_t)r->l0 & xfs_mask64lo(9)) << 43) | |
1da177e4 | 173 | (((xfs_dfsbno_t)r->l1) >> 21); |
9d87c319 | 174 | ASSERT((b >> 32) == 0 || isnulldstartblock(b)); |
1da177e4 LT |
175 | return (xfs_fsblock_t)b; |
176 | #else /* !DEBUG */ | |
177 | return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21); | |
178 | #endif /* DEBUG */ | |
179 | #endif /* XFS_BIG_BLKNOS */ | |
180 | } | |
181 | ||
182 | /* | |
183 | * Extract the startoff field from an in memory bmap extent record. | |
184 | */ | |
185 | xfs_fileoff_t | |
186 | xfs_bmbt_get_startoff( | |
a6f64d4a | 187 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
188 | { |
189 | return ((xfs_fileoff_t)r->l0 & | |
fb82557f | 190 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 LT |
191 | } |
192 | ||
193 | xfs_exntst_t | |
194 | xfs_bmbt_get_state( | |
a6f64d4a | 195 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
196 | { |
197 | int ext_flag; | |
198 | ||
199 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
200 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), | |
201 | ext_flag); | |
202 | } | |
203 | ||
1da177e4 LT |
204 | /* |
205 | * Extract the blockcount field from an on disk bmap extent record. | |
206 | */ | |
207 | xfs_filblks_t | |
208 | xfs_bmbt_disk_get_blockcount( | |
209 | xfs_bmbt_rec_t *r) | |
210 | { | |
fb82557f | 211 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21)); |
1da177e4 LT |
212 | } |
213 | ||
1da177e4 LT |
214 | /* |
215 | * Extract the startoff field from a disk format bmap extent record. | |
216 | */ | |
217 | xfs_fileoff_t | |
218 | xfs_bmbt_disk_get_startoff( | |
219 | xfs_bmbt_rec_t *r) | |
220 | { | |
cd8b0a97 | 221 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
fb82557f | 222 | xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
1da177e4 | 223 | } |
1da177e4 | 224 | |
1da177e4 | 225 | |
1da177e4 LT |
226 | /* |
227 | * Set all the fields in a bmap extent record from the arguments. | |
228 | */ | |
229 | void | |
230 | xfs_bmbt_set_allf( | |
8cba4344 CH |
231 | xfs_bmbt_rec_host_t *r, |
232 | xfs_fileoff_t startoff, | |
233 | xfs_fsblock_t startblock, | |
234 | xfs_filblks_t blockcount, | |
235 | xfs_exntst_t state) | |
1da177e4 | 236 | { |
8cba4344 CH |
237 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
238 | ||
239 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
240 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
241 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 242 | |
1da177e4 | 243 | #if XFS_BIG_BLKNOS |
fb82557f | 244 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 245 | |
1da177e4 | 246 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 CH |
247 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
248 | ((xfs_bmbt_rec_base_t)startblock >> 43); | |
249 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
250 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 251 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 | 252 | #else /* !XFS_BIG_BLKNOS */ |
9d87c319 | 253 | if (isnullstartblock(startblock)) { |
1da177e4 | 254 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 | 255 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
fb82557f ES |
256 | (xfs_bmbt_rec_base_t)xfs_mask64lo(9); |
257 | r->l1 = xfs_mask64hi(11) | | |
8cba4344 CH |
258 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
259 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 260 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
261 | } else { |
262 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
8cba4344 CH |
263 | ((xfs_bmbt_rec_base_t)startoff << 9); |
264 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
265 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 266 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
267 | } |
268 | #endif /* XFS_BIG_BLKNOS */ | |
269 | } | |
270 | ||
1da177e4 LT |
271 | /* |
272 | * Set all the fields in a bmap extent record from the uncompressed form. | |
273 | */ | |
274 | void | |
8cba4344 CH |
275 | xfs_bmbt_set_all( |
276 | xfs_bmbt_rec_host_t *r, | |
277 | xfs_bmbt_irec_t *s) | |
1da177e4 | 278 | { |
8cba4344 CH |
279 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
280 | s->br_blockcount, s->br_state); | |
1da177e4 LT |
281 | } |
282 | ||
8cba4344 | 283 | |
1da177e4 LT |
284 | /* |
285 | * Set all the fields in a disk format bmap extent record from the arguments. | |
286 | */ | |
287 | void | |
288 | xfs_bmbt_disk_set_allf( | |
8cba4344 CH |
289 | xfs_bmbt_rec_t *r, |
290 | xfs_fileoff_t startoff, | |
291 | xfs_fsblock_t startblock, | |
292 | xfs_filblks_t blockcount, | |
293 | xfs_exntst_t state) | |
1da177e4 | 294 | { |
8cba4344 CH |
295 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
296 | ||
297 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
fb82557f ES |
298 | ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); |
299 | ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 300 | |
1da177e4 | 301 | #if XFS_BIG_BLKNOS |
fb82557f | 302 | ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
8cba4344 | 303 | |
cd8b0a97 | 304 | r->l0 = cpu_to_be64( |
8cba4344 CH |
305 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
306 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
307 | ((xfs_bmbt_rec_base_t)startblock >> 43)); | |
cd8b0a97 | 308 | r->l1 = cpu_to_be64( |
8cba4344 CH |
309 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
310 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 311 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 | 312 | #else /* !XFS_BIG_BLKNOS */ |
9d87c319 | 313 | if (isnullstartblock(startblock)) { |
cd8b0a97 | 314 | r->l0 = cpu_to_be64( |
8cba4344 CH |
315 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
316 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
fb82557f ES |
317 | (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); |
318 | r->l1 = cpu_to_be64(xfs_mask64hi(11) | | |
8cba4344 CH |
319 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
320 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 321 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 | 322 | } else { |
cd8b0a97 | 323 | r->l0 = cpu_to_be64( |
8cba4344 CH |
324 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
325 | ((xfs_bmbt_rec_base_t)startoff << 9)); | |
cd8b0a97 | 326 | r->l1 = cpu_to_be64( |
8cba4344 CH |
327 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
328 | ((xfs_bmbt_rec_base_t)blockcount & | |
fb82557f | 329 | (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); |
1da177e4 LT |
330 | } |
331 | #endif /* XFS_BIG_BLKNOS */ | |
332 | } | |
8cba4344 CH |
333 | |
334 | /* | |
335 | * Set all the fields in a bmap extent record from the uncompressed form. | |
336 | */ | |
5d77c0dc | 337 | STATIC void |
8cba4344 CH |
338 | xfs_bmbt_disk_set_all( |
339 | xfs_bmbt_rec_t *r, | |
340 | xfs_bmbt_irec_t *s) | |
341 | { | |
342 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, | |
343 | s->br_blockcount, s->br_state); | |
344 | } | |
1da177e4 LT |
345 | |
346 | /* | |
347 | * Set the blockcount field in a bmap extent record. | |
348 | */ | |
349 | void | |
350 | xfs_bmbt_set_blockcount( | |
a6f64d4a | 351 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
352 | xfs_filblks_t v) |
353 | { | |
fb82557f ES |
354 | ASSERT((v & xfs_mask64hi(43)) == 0); |
355 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) | | |
356 | (xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21)); | |
1da177e4 LT |
357 | } |
358 | ||
359 | /* | |
360 | * Set the startblock field in a bmap extent record. | |
361 | */ | |
362 | void | |
363 | xfs_bmbt_set_startblock( | |
a6f64d4a | 364 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
365 | xfs_fsblock_t v) |
366 | { | |
367 | #if XFS_BIG_BLKNOS | |
fb82557f ES |
368 | ASSERT((v & xfs_mask64hi(12)) == 0); |
369 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) | | |
1da177e4 | 370 | (xfs_bmbt_rec_base_t)(v >> 43); |
fb82557f | 371 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) | |
1da177e4 LT |
372 | (xfs_bmbt_rec_base_t)(v << 21); |
373 | #else /* !XFS_BIG_BLKNOS */ | |
9d87c319 | 374 | if (isnullstartblock(v)) { |
fb82557f ES |
375 | r->l0 |= (xfs_bmbt_rec_base_t)xfs_mask64lo(9); |
376 | r->l1 = (xfs_bmbt_rec_base_t)xfs_mask64hi(11) | | |
1da177e4 | 377 | ((xfs_bmbt_rec_base_t)v << 21) | |
fb82557f | 378 | (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 | 379 | } else { |
fb82557f | 380 | r->l0 &= ~(xfs_bmbt_rec_base_t)xfs_mask64lo(9); |
1da177e4 | 381 | r->l1 = ((xfs_bmbt_rec_base_t)v << 21) | |
fb82557f | 382 | (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); |
1da177e4 LT |
383 | } |
384 | #endif /* XFS_BIG_BLKNOS */ | |
385 | } | |
386 | ||
387 | /* | |
388 | * Set the startoff field in a bmap extent record. | |
389 | */ | |
390 | void | |
391 | xfs_bmbt_set_startoff( | |
a6f64d4a | 392 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
393 | xfs_fileoff_t v) |
394 | { | |
fb82557f ES |
395 | ASSERT((v & xfs_mask64hi(9)) == 0); |
396 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) | | |
1da177e4 | 397 | ((xfs_bmbt_rec_base_t)v << 9) | |
fb82557f | 398 | (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); |
1da177e4 LT |
399 | } |
400 | ||
401 | /* | |
402 | * Set the extent state field in a bmap extent record. | |
403 | */ | |
404 | void | |
405 | xfs_bmbt_set_state( | |
a6f64d4a | 406 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
407 | xfs_exntst_t v) |
408 | { | |
409 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); | |
410 | if (v == XFS_EXT_NORM) | |
fb82557f | 411 | r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN); |
1da177e4 | 412 | else |
fb82557f | 413 | r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN); |
1da177e4 LT |
414 | } |
415 | ||
416 | /* | |
417 | * Convert in-memory form of btree root to on-disk form. | |
418 | */ | |
419 | void | |
420 | xfs_bmbt_to_bmdr( | |
60197e8d | 421 | struct xfs_mount *mp, |
7cc95a82 | 422 | struct xfs_btree_block *rblock, |
1da177e4 LT |
423 | int rblocklen, |
424 | xfs_bmdr_block_t *dblock, | |
425 | int dblocklen) | |
426 | { | |
427 | int dmxr; | |
428 | xfs_bmbt_key_t *fkp; | |
576039cf | 429 | __be64 *fpp; |
1da177e4 | 430 | xfs_bmbt_key_t *tkp; |
576039cf | 431 | __be64 *tpp; |
1da177e4 | 432 | |
ee1a47ab CH |
433 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
434 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_CRC_MAGIC)); | |
435 | ASSERT(uuid_equal(&rblock->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid)); | |
436 | ASSERT(rblock->bb_u.l.bb_blkno == | |
437 | cpu_to_be64(XFS_BUF_DADDR_NULL)); | |
438 | } else | |
439 | ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC)); | |
69ef921b CH |
440 | ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO)); |
441 | ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO)); | |
442 | ASSERT(rblock->bb_level != 0); | |
16259e7d CH |
443 | dblock->bb_level = rblock->bb_level; |
444 | dblock->bb_numrecs = rblock->bb_numrecs; | |
60197e8d | 445 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
136341b4 CH |
446 | fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); |
447 | tkp = XFS_BMDR_KEY_ADDR(dblock, 1); | |
60197e8d | 448 | fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
136341b4 | 449 | tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); |
16259e7d | 450 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 451 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 452 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
453 | } |
454 | ||
1da177e4 | 455 | /* |
4eea22f0 | 456 | * Check extent records, which have just been read, for |
1da177e4 LT |
457 | * any bit in the extent flag field. ASSERT on debug |
458 | * kernels, as this condition should not occur. | |
459 | * Return an error condition (1) if any flags found, | |
460 | * otherwise return 0. | |
461 | */ | |
462 | ||
463 | int | |
464 | xfs_check_nostate_extents( | |
4eea22f0 MK |
465 | xfs_ifork_t *ifp, |
466 | xfs_extnum_t idx, | |
1da177e4 LT |
467 | xfs_extnum_t num) |
468 | { | |
4eea22f0 | 469 | for (; num > 0; num--, idx++) { |
a6f64d4a | 470 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
471 | if ((ep->l0 >> |
472 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { | |
473 | ASSERT(0); | |
474 | return 1; | |
475 | } | |
476 | } | |
477 | return 0; | |
478 | } | |
561f7d17 CH |
479 | |
480 | ||
481 | STATIC struct xfs_btree_cur * | |
482 | xfs_bmbt_dup_cursor( | |
483 | struct xfs_btree_cur *cur) | |
484 | { | |
485 | struct xfs_btree_cur *new; | |
486 | ||
487 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
488 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); | |
489 | ||
490 | /* | |
491 | * Copy the firstblock, flist, and flags values, | |
492 | * since init cursor doesn't get them. | |
493 | */ | |
494 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; | |
495 | new->bc_private.b.flist = cur->bc_private.b.flist; | |
496 | new->bc_private.b.flags = cur->bc_private.b.flags; | |
497 | ||
498 | return new; | |
499 | } | |
500 | ||
4b22a571 CH |
501 | STATIC void |
502 | xfs_bmbt_update_cursor( | |
503 | struct xfs_btree_cur *src, | |
504 | struct xfs_btree_cur *dst) | |
505 | { | |
506 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || | |
507 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); | |
508 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); | |
509 | ||
510 | dst->bc_private.b.allocated += src->bc_private.b.allocated; | |
511 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; | |
512 | ||
513 | src->bc_private.b.allocated = 0; | |
514 | } | |
515 | ||
f5eb8e7c CH |
516 | STATIC int |
517 | xfs_bmbt_alloc_block( | |
518 | struct xfs_btree_cur *cur, | |
519 | union xfs_btree_ptr *start, | |
520 | union xfs_btree_ptr *new, | |
521 | int length, | |
522 | int *stat) | |
523 | { | |
524 | xfs_alloc_arg_t args; /* block allocation args */ | |
525 | int error; /* error return value */ | |
526 | ||
527 | memset(&args, 0, sizeof(args)); | |
528 | args.tp = cur->bc_tp; | |
529 | args.mp = cur->bc_mp; | |
530 | args.fsbno = cur->bc_private.b.firstblock; | |
531 | args.firstblock = args.fsbno; | |
532 | ||
533 | if (args.fsbno == NULLFSBLOCK) { | |
534 | args.fsbno = be64_to_cpu(start->l); | |
535 | args.type = XFS_ALLOCTYPE_START_BNO; | |
536 | /* | |
537 | * Make sure there is sufficient room left in the AG to | |
538 | * complete a full tree split for an extent insert. If | |
539 | * we are converting the middle part of an extent then | |
540 | * we may need space for two tree splits. | |
541 | * | |
542 | * We are relying on the caller to make the correct block | |
543 | * reservation for this operation to succeed. If the | |
544 | * reservation amount is insufficient then we may fail a | |
545 | * block allocation here and corrupt the filesystem. | |
546 | */ | |
547 | args.minleft = xfs_trans_get_block_res(args.tp); | |
548 | } else if (cur->bc_private.b.flist->xbf_low) { | |
549 | args.type = XFS_ALLOCTYPE_START_BNO; | |
550 | } else { | |
551 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
552 | } | |
553 | ||
554 | args.minlen = args.maxlen = args.prod = 1; | |
555 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; | |
556 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { | |
557 | error = XFS_ERROR(ENOSPC); | |
558 | goto error0; | |
559 | } | |
560 | error = xfs_alloc_vextent(&args); | |
561 | if (error) | |
562 | goto error0; | |
563 | ||
564 | if (args.fsbno == NULLFSBLOCK && args.minleft) { | |
565 | /* | |
566 | * Could not find an AG with enough free space to satisfy | |
567 | * a full btree split. Try again without minleft and if | |
568 | * successful activate the lowspace algorithm. | |
569 | */ | |
570 | args.fsbno = 0; | |
571 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
572 | args.minleft = 0; | |
573 | error = xfs_alloc_vextent(&args); | |
574 | if (error) | |
575 | goto error0; | |
576 | cur->bc_private.b.flist->xbf_low = 1; | |
577 | } | |
578 | if (args.fsbno == NULLFSBLOCK) { | |
579 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
580 | *stat = 0; | |
581 | return 0; | |
582 | } | |
583 | ASSERT(args.len == 1); | |
584 | cur->bc_private.b.firstblock = args.fsbno; | |
585 | cur->bc_private.b.allocated++; | |
586 | cur->bc_private.b.ip->i_d.di_nblocks++; | |
587 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); | |
7d095257 | 588 | xfs_trans_mod_dquot_byino(args.tp, cur->bc_private.b.ip, |
f5eb8e7c CH |
589 | XFS_TRANS_DQ_BCOUNT, 1L); |
590 | ||
591 | new->l = cpu_to_be64(args.fsbno); | |
592 | ||
593 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
594 | *stat = 1; | |
595 | return 0; | |
596 | ||
597 | error0: | |
598 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
599 | return error; | |
600 | } | |
601 | ||
d4b3a4b7 CH |
602 | STATIC int |
603 | xfs_bmbt_free_block( | |
604 | struct xfs_btree_cur *cur, | |
605 | struct xfs_buf *bp) | |
606 | { | |
607 | struct xfs_mount *mp = cur->bc_mp; | |
608 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
609 | struct xfs_trans *tp = cur->bc_tp; | |
610 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); | |
611 | ||
612 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); | |
613 | ip->i_d.di_nblocks--; | |
614 | ||
615 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
7d095257 | 616 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
d4b3a4b7 CH |
617 | xfs_trans_binval(tp, bp); |
618 | return 0; | |
619 | } | |
620 | ||
91cca5df CH |
621 | STATIC int |
622 | xfs_bmbt_get_minrecs( | |
623 | struct xfs_btree_cur *cur, | |
624 | int level) | |
625 | { | |
60197e8d CH |
626 | if (level == cur->bc_nlevels - 1) { |
627 | struct xfs_ifork *ifp; | |
628 | ||
629 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
630 | cur->bc_private.b.whichfork); | |
631 | ||
632 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
633 | ifp->if_broot_bytes, level == 0) / 2; | |
634 | } | |
635 | ||
636 | return cur->bc_mp->m_bmap_dmnr[level != 0]; | |
91cca5df CH |
637 | } |
638 | ||
60197e8d | 639 | int |
ce5e42db CH |
640 | xfs_bmbt_get_maxrecs( |
641 | struct xfs_btree_cur *cur, | |
642 | int level) | |
643 | { | |
60197e8d CH |
644 | if (level == cur->bc_nlevels - 1) { |
645 | struct xfs_ifork *ifp; | |
646 | ||
647 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
648 | cur->bc_private.b.whichfork); | |
649 | ||
650 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
651 | ifp->if_broot_bytes, level == 0); | |
652 | } | |
653 | ||
654 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
655 | ||
ce5e42db CH |
656 | } |
657 | ||
4b22a571 CH |
658 | /* |
659 | * Get the maximum records we could store in the on-disk format. | |
660 | * | |
661 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but | |
662 | * for the root node this checks the available space in the dinode fork | |
663 | * so that we can resize the in-memory buffer to match it. After a | |
664 | * resize to the maximum size this function returns the same value | |
665 | * as xfs_bmbt_get_maxrecs for the root node, too. | |
666 | */ | |
667 | STATIC int | |
668 | xfs_bmbt_get_dmaxrecs( | |
669 | struct xfs_btree_cur *cur, | |
670 | int level) | |
671 | { | |
60197e8d CH |
672 | if (level != cur->bc_nlevels - 1) |
673 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
674 | return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize, | |
675 | level == 0); | |
4b22a571 CH |
676 | } |
677 | ||
fe033cc8 CH |
678 | STATIC void |
679 | xfs_bmbt_init_key_from_rec( | |
680 | union xfs_btree_key *key, | |
681 | union xfs_btree_rec *rec) | |
682 | { | |
683 | key->bmbt.br_startoff = | |
684 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); | |
685 | } | |
686 | ||
4b22a571 CH |
687 | STATIC void |
688 | xfs_bmbt_init_rec_from_key( | |
689 | union xfs_btree_key *key, | |
690 | union xfs_btree_rec *rec) | |
691 | { | |
692 | ASSERT(key->bmbt.br_startoff != 0); | |
693 | ||
694 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), | |
695 | 0, 0, XFS_EXT_NORM); | |
696 | } | |
697 | ||
698 | STATIC void | |
699 | xfs_bmbt_init_rec_from_cur( | |
700 | struct xfs_btree_cur *cur, | |
701 | union xfs_btree_rec *rec) | |
702 | { | |
703 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); | |
704 | } | |
705 | ||
fe033cc8 CH |
706 | STATIC void |
707 | xfs_bmbt_init_ptr_from_cur( | |
708 | struct xfs_btree_cur *cur, | |
709 | union xfs_btree_ptr *ptr) | |
710 | { | |
711 | ptr->l = 0; | |
712 | } | |
713 | ||
714 | STATIC __int64_t | |
715 | xfs_bmbt_key_diff( | |
716 | struct xfs_btree_cur *cur, | |
717 | union xfs_btree_key *key) | |
718 | { | |
719 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - | |
720 | cur->bc_rec.b.br_startoff; | |
721 | } | |
722 | ||
c5c249b4 | 723 | static bool |
612cfbfe | 724 | xfs_bmbt_verify( |
3d3e6f64 DC |
725 | struct xfs_buf *bp) |
726 | { | |
727 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
728 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
729 | unsigned int level; | |
3d3e6f64 | 730 | |
ee1a47ab CH |
731 | switch (block->bb_magic) { |
732 | case cpu_to_be32(XFS_BMAP_CRC_MAGIC): | |
733 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
734 | return false; | |
735 | if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid)) | |
736 | return false; | |
737 | if (be64_to_cpu(block->bb_u.l.bb_blkno) != bp->b_bn) | |
738 | return false; | |
739 | /* | |
740 | * XXX: need a better way of verifying the owner here. Right now | |
741 | * just make sure there has been one set. | |
742 | */ | |
743 | if (be64_to_cpu(block->bb_u.l.bb_owner) == 0) | |
744 | return false; | |
745 | /* fall through */ | |
746 | case cpu_to_be32(XFS_BMAP_MAGIC): | |
747 | break; | |
748 | default: | |
749 | return false; | |
750 | } | |
751 | ||
752 | /* | |
753 | * numrecs and level verification. | |
3d3e6f64 | 754 | * |
ee1a47ab | 755 | * We don't know what fork we belong to, so just verify that the level |
3d3e6f64 DC |
756 | * is less than the maximum of the two. Later checks will be more |
757 | * precise. | |
758 | */ | |
759 | level = be16_to_cpu(block->bb_level); | |
ee1a47ab CH |
760 | if (level > max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1])) |
761 | return false; | |
762 | if (be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0]) | |
763 | return false; | |
3d3e6f64 DC |
764 | |
765 | /* sibling pointer verification */ | |
ee1a47ab CH |
766 | if (!block->bb_u.l.bb_leftsib || |
767 | (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLDFSBNO) && | |
768 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib)))) | |
769 | return false; | |
770 | if (!block->bb_u.l.bb_rightsib || | |
771 | (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLDFSBNO) && | |
772 | !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib)))) | |
773 | return false; | |
774 | ||
775 | return true; | |
612cfbfe | 776 | } |
3d3e6f64 | 777 | |
1813dd64 DC |
778 | static void |
779 | xfs_bmbt_read_verify( | |
612cfbfe DC |
780 | struct xfs_buf *bp) |
781 | { | |
ee1a47ab CH |
782 | if (!(xfs_btree_lblock_verify_crc(bp) && |
783 | xfs_bmbt_verify(bp))) { | |
784 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
785 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, | |
786 | bp->b_target->bt_mount, bp->b_addr); | |
787 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
788 | } | |
612cfbfe DC |
789 | } |
790 | ||
1813dd64 DC |
791 | static void |
792 | xfs_bmbt_write_verify( | |
612cfbfe DC |
793 | struct xfs_buf *bp) |
794 | { | |
ee1a47ab CH |
795 | if (!xfs_bmbt_verify(bp)) { |
796 | xfs_warn(bp->b_target->bt_mount, "bmbt daddr 0x%llx failed", bp->b_bn); | |
797 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
798 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, | |
799 | bp->b_target->bt_mount, bp->b_addr); | |
800 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
801 | return; | |
802 | } | |
803 | xfs_btree_lblock_calc_crc(bp); | |
3d3e6f64 DC |
804 | } |
805 | ||
1813dd64 DC |
806 | const struct xfs_buf_ops xfs_bmbt_buf_ops = { |
807 | .verify_read = xfs_bmbt_read_verify, | |
808 | .verify_write = xfs_bmbt_write_verify, | |
809 | }; | |
810 | ||
811 | ||
742ae1e3 | 812 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
813 | STATIC int |
814 | xfs_bmbt_keys_inorder( | |
815 | struct xfs_btree_cur *cur, | |
816 | union xfs_btree_key *k1, | |
817 | union xfs_btree_key *k2) | |
818 | { | |
819 | return be64_to_cpu(k1->bmbt.br_startoff) < | |
820 | be64_to_cpu(k2->bmbt.br_startoff); | |
821 | } | |
822 | ||
823 | STATIC int | |
824 | xfs_bmbt_recs_inorder( | |
825 | struct xfs_btree_cur *cur, | |
826 | union xfs_btree_rec *r1, | |
827 | union xfs_btree_rec *r2) | |
828 | { | |
829 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + | |
830 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= | |
831 | xfs_bmbt_disk_get_startoff(&r2->bmbt); | |
832 | } | |
833 | #endif /* DEBUG */ | |
834 | ||
561f7d17 | 835 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
65f1eaea CH |
836 | .rec_len = sizeof(xfs_bmbt_rec_t), |
837 | .key_len = sizeof(xfs_bmbt_key_t), | |
838 | ||
561f7d17 | 839 | .dup_cursor = xfs_bmbt_dup_cursor, |
4b22a571 | 840 | .update_cursor = xfs_bmbt_update_cursor, |
f5eb8e7c | 841 | .alloc_block = xfs_bmbt_alloc_block, |
d4b3a4b7 | 842 | .free_block = xfs_bmbt_free_block, |
ce5e42db | 843 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
91cca5df | 844 | .get_minrecs = xfs_bmbt_get_minrecs, |
4b22a571 | 845 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
fe033cc8 | 846 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
4b22a571 CH |
847 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, |
848 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, | |
fe033cc8 CH |
849 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
850 | .key_diff = xfs_bmbt_key_diff, | |
1813dd64 | 851 | .buf_ops = &xfs_bmbt_buf_ops, |
742ae1e3 | 852 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
853 | .keys_inorder = xfs_bmbt_keys_inorder, |
854 | .recs_inorder = xfs_bmbt_recs_inorder, | |
855 | #endif | |
561f7d17 CH |
856 | }; |
857 | ||
858 | /* | |
859 | * Allocate a new bmap btree cursor. | |
860 | */ | |
861 | struct xfs_btree_cur * /* new bmap btree cursor */ | |
862 | xfs_bmbt_init_cursor( | |
863 | struct xfs_mount *mp, /* file system mount point */ | |
864 | struct xfs_trans *tp, /* transaction pointer */ | |
865 | struct xfs_inode *ip, /* inode owning the btree */ | |
866 | int whichfork) /* data or attr fork */ | |
867 | { | |
868 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
869 | struct xfs_btree_cur *cur; | |
870 | ||
871 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
872 | ||
873 | cur->bc_tp = tp; | |
874 | cur->bc_mp = mp; | |
875 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
876 | cur->bc_btnum = XFS_BTNUM_BMAP; | |
877 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
878 | ||
879 | cur->bc_ops = &xfs_bmbt_ops; | |
e99ab90d | 880 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
ee1a47ab CH |
881 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
882 | cur->bc_flags |= XFS_BTREE_CRC_BLOCKS; | |
561f7d17 CH |
883 | |
884 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); | |
885 | cur->bc_private.b.ip = ip; | |
886 | cur->bc_private.b.firstblock = NULLFSBLOCK; | |
887 | cur->bc_private.b.flist = NULL; | |
888 | cur->bc_private.b.allocated = 0; | |
889 | cur->bc_private.b.flags = 0; | |
890 | cur->bc_private.b.whichfork = whichfork; | |
891 | ||
892 | return cur; | |
893 | } | |
60197e8d CH |
894 | |
895 | /* | |
896 | * Calculate number of records in a bmap btree block. | |
897 | */ | |
898 | int | |
899 | xfs_bmbt_maxrecs( | |
900 | struct xfs_mount *mp, | |
901 | int blocklen, | |
902 | int leaf) | |
903 | { | |
7cc95a82 | 904 | blocklen -= XFS_BMBT_BLOCK_LEN(mp); |
60197e8d CH |
905 | |
906 | if (leaf) | |
907 | return blocklen / sizeof(xfs_bmbt_rec_t); | |
908 | return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)); | |
909 | } | |
910 | ||
911 | /* | |
912 | * Calculate number of records in a bmap btree inode root. | |
913 | */ | |
914 | int | |
915 | xfs_bmdr_maxrecs( | |
916 | struct xfs_mount *mp, | |
917 | int blocklen, | |
918 | int leaf) | |
919 | { | |
920 | blocklen -= sizeof(xfs_bmdr_block_t); | |
921 | ||
922 | if (leaf) | |
923 | return blocklen / sizeof(xfs_bmdr_rec_t); | |
924 | return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t)); | |
925 | } | |
21b5c978 DC |
926 | |
927 | /* | |
928 | * Change the owner of a btree format fork fo the inode passed in. Change it to | |
929 | * the owner of that is passed in so that we can change owners before or after | |
930 | * we switch forks between inodes. The operation that the caller is doing will | |
931 | * determine whether is needs to change owner before or after the switch. | |
932 | * | |
638f4416 DC |
933 | * For demand paged transactional modification, the fork switch should be done |
934 | * after reading in all the blocks, modifying them and pinning them in the | |
935 | * transaction. For modification when the buffers are already pinned in memory, | |
936 | * the fork switch can be done before changing the owner as we won't need to | |
937 | * validate the owner until the btree buffers are unpinned and writes can occur | |
938 | * again. | |
939 | * | |
940 | * For recovery based ownership change, there is no transactional context and | |
941 | * so a buffer list must be supplied so that we can record the buffers that we | |
942 | * modified for the caller to issue IO on. | |
21b5c978 DC |
943 | */ |
944 | int | |
945 | xfs_bmbt_change_owner( | |
946 | struct xfs_trans *tp, | |
947 | struct xfs_inode *ip, | |
948 | int whichfork, | |
638f4416 DC |
949 | xfs_ino_t new_owner, |
950 | struct list_head *buffer_list) | |
21b5c978 DC |
951 | { |
952 | struct xfs_btree_cur *cur; | |
953 | int error; | |
954 | ||
638f4416 DC |
955 | ASSERT(tp || buffer_list); |
956 | ASSERT(!(tp && buffer_list)); | |
21b5c978 | 957 | if (whichfork == XFS_DATA_FORK) |
aa9e1040 | 958 | ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_BTREE); |
21b5c978 | 959 | else |
aa9e1040 | 960 | ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE); |
21b5c978 DC |
961 | |
962 | cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork); | |
638f4416 DC |
963 | if (!cur) |
964 | return ENOMEM; | |
965 | ||
966 | error = xfs_btree_change_owner(cur, new_owner, buffer_list); | |
21b5c978 DC |
967 | xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
968 | return error; | |
969 | } |