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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 | 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" | |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
1da177e4 | 33 | #include "xfs_dir2_sf.h" |
a844f451 | 34 | #include "xfs_attr_sf.h" |
1da177e4 | 35 | #include "xfs_dinode.h" |
1da177e4 | 36 | #include "xfs_inode.h" |
a844f451 | 37 | #include "xfs_inode_item.h" |
1da177e4 | 38 | #include "xfs_alloc.h" |
a844f451 | 39 | #include "xfs_btree.h" |
8c4ed633 | 40 | #include "xfs_btree_trace.h" |
a844f451 NS |
41 | #include "xfs_ialloc.h" |
42 | #include "xfs_itable.h" | |
1da177e4 LT |
43 | #include "xfs_bmap.h" |
44 | #include "xfs_error.h" | |
45 | #include "xfs_quota.h" | |
46 | ||
1da177e4 | 47 | |
1da177e4 LT |
48 | /* |
49 | * Determine the extent state. | |
50 | */ | |
51 | /* ARGSUSED */ | |
52 | STATIC xfs_exntst_t | |
53 | xfs_extent_state( | |
54 | xfs_filblks_t blks, | |
55 | int extent_flag) | |
56 | { | |
57 | if (extent_flag) { | |
58 | ASSERT(blks != 0); /* saved for DMIG */ | |
59 | return XFS_EXT_UNWRITTEN; | |
60 | } | |
61 | return XFS_EXT_NORM; | |
62 | } | |
63 | ||
1da177e4 LT |
64 | /* |
65 | * Convert on-disk form of btree root to in-memory form. | |
66 | */ | |
67 | void | |
68 | xfs_bmdr_to_bmbt( | |
69 | xfs_bmdr_block_t *dblock, | |
70 | int dblocklen, | |
71 | xfs_bmbt_block_t *rblock, | |
72 | int rblocklen) | |
73 | { | |
74 | int dmxr; | |
75 | xfs_bmbt_key_t *fkp; | |
576039cf | 76 | __be64 *fpp; |
1da177e4 | 77 | xfs_bmbt_key_t *tkp; |
576039cf | 78 | __be64 *tpp; |
1da177e4 | 79 | |
16259e7d CH |
80 | rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
81 | rblock->bb_level = dblock->bb_level; | |
82 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
83 | rblock->bb_numrecs = dblock->bb_numrecs; | |
84 | rblock->bb_leftsib = cpu_to_be64(NULLDFSBNO); | |
85 | rblock->bb_rightsib = cpu_to_be64(NULLDFSBNO); | |
1da177e4 | 86 | dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0); |
2c36dded | 87 | fkp = XFS_BTREE_KEY_ADDR(xfs_bmdr, dblock, 1); |
1da177e4 | 88 | tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen); |
2c36dded | 89 | fpp = XFS_BTREE_PTR_ADDR(xfs_bmdr, dblock, 1, dmxr); |
1da177e4 | 90 | tpp = XFS_BMAP_BROOT_PTR_ADDR(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 | */ | |
101 | ||
7989cb8e | 102 | STATIC_INLINE void |
1da177e4 LT |
103 | __xfs_bmbt_get_all( |
104 | __uint64_t l0, | |
105 | __uint64_t l1, | |
106 | xfs_bmbt_irec_t *s) | |
107 | { | |
108 | int ext_flag; | |
109 | xfs_exntst_t st; | |
110 | ||
111 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
112 | s->br_startoff = ((xfs_fileoff_t)l0 & | |
113 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; | |
114 | #if XFS_BIG_BLKNOS | |
115 | s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) | | |
116 | (((xfs_fsblock_t)l1) >> 21); | |
117 | #else | |
118 | #ifdef DEBUG | |
119 | { | |
120 | xfs_dfsbno_t b; | |
121 | ||
122 | b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) | | |
123 | (((xfs_dfsbno_t)l1) >> 21); | |
124 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); | |
125 | s->br_startblock = (xfs_fsblock_t)b; | |
126 | } | |
127 | #else /* !DEBUG */ | |
128 | s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21); | |
129 | #endif /* DEBUG */ | |
130 | #endif /* XFS_BIG_BLKNOS */ | |
131 | s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21)); | |
132 | /* This is xfs_extent_state() in-line */ | |
133 | if (ext_flag) { | |
134 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ | |
135 | st = XFS_EXT_UNWRITTEN; | |
136 | } else | |
137 | st = XFS_EXT_NORM; | |
138 | s->br_state = st; | |
139 | } | |
140 | ||
141 | void | |
142 | xfs_bmbt_get_all( | |
a6f64d4a | 143 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
144 | xfs_bmbt_irec_t *s) |
145 | { | |
146 | __xfs_bmbt_get_all(r->l0, r->l1, s); | |
147 | } | |
148 | ||
1da177e4 LT |
149 | /* |
150 | * Extract the blockcount field from an in memory bmap extent record. | |
151 | */ | |
152 | xfs_filblks_t | |
153 | xfs_bmbt_get_blockcount( | |
a6f64d4a | 154 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
155 | { |
156 | return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21)); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Extract the startblock field from an in memory bmap extent record. | |
161 | */ | |
162 | xfs_fsblock_t | |
163 | xfs_bmbt_get_startblock( | |
a6f64d4a | 164 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
165 | { |
166 | #if XFS_BIG_BLKNOS | |
167 | return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) | | |
168 | (((xfs_fsblock_t)r->l1) >> 21); | |
169 | #else | |
170 | #ifdef DEBUG | |
171 | xfs_dfsbno_t b; | |
172 | ||
173 | b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) | | |
174 | (((xfs_dfsbno_t)r->l1) >> 21); | |
175 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); | |
176 | return (xfs_fsblock_t)b; | |
177 | #else /* !DEBUG */ | |
178 | return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21); | |
179 | #endif /* DEBUG */ | |
180 | #endif /* XFS_BIG_BLKNOS */ | |
181 | } | |
182 | ||
183 | /* | |
184 | * Extract the startoff field from an in memory bmap extent record. | |
185 | */ | |
186 | xfs_fileoff_t | |
187 | xfs_bmbt_get_startoff( | |
a6f64d4a | 188 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
189 | { |
190 | return ((xfs_fileoff_t)r->l0 & | |
191 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; | |
192 | } | |
193 | ||
194 | xfs_exntst_t | |
195 | xfs_bmbt_get_state( | |
a6f64d4a | 196 | xfs_bmbt_rec_host_t *r) |
1da177e4 LT |
197 | { |
198 | int ext_flag; | |
199 | ||
200 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
201 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), | |
202 | ext_flag); | |
203 | } | |
204 | ||
1da177e4 LT |
205 | /* Endian flipping versions of the bmbt extraction functions */ |
206 | void | |
207 | xfs_bmbt_disk_get_all( | |
208 | xfs_bmbt_rec_t *r, | |
209 | xfs_bmbt_irec_t *s) | |
210 | { | |
cd8b0a97 | 211 | __xfs_bmbt_get_all(be64_to_cpu(r->l0), be64_to_cpu(r->l1), s); |
1da177e4 LT |
212 | } |
213 | ||
214 | /* | |
215 | * Extract the blockcount field from an on disk bmap extent record. | |
216 | */ | |
217 | xfs_filblks_t | |
218 | xfs_bmbt_disk_get_blockcount( | |
219 | xfs_bmbt_rec_t *r) | |
220 | { | |
cd8b0a97 | 221 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & XFS_MASK64LO(21)); |
1da177e4 LT |
222 | } |
223 | ||
1da177e4 LT |
224 | /* |
225 | * Extract the startoff field from a disk format bmap extent record. | |
226 | */ | |
227 | xfs_fileoff_t | |
228 | xfs_bmbt_disk_get_startoff( | |
229 | xfs_bmbt_rec_t *r) | |
230 | { | |
cd8b0a97 | 231 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
1da177e4 LT |
232 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
233 | } | |
1da177e4 | 234 | |
1da177e4 | 235 | |
1da177e4 LT |
236 | /* |
237 | * Set all the fields in a bmap extent record from the arguments. | |
238 | */ | |
239 | void | |
240 | xfs_bmbt_set_allf( | |
8cba4344 CH |
241 | xfs_bmbt_rec_host_t *r, |
242 | xfs_fileoff_t startoff, | |
243 | xfs_fsblock_t startblock, | |
244 | xfs_filblks_t blockcount, | |
245 | xfs_exntst_t state) | |
1da177e4 | 246 | { |
8cba4344 CH |
247 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
248 | ||
249 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
250 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); | |
251 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 252 | |
1da177e4 | 253 | #if XFS_BIG_BLKNOS |
8cba4344 CH |
254 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
255 | ||
1da177e4 | 256 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 CH |
257 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
258 | ((xfs_bmbt_rec_base_t)startblock >> 43); | |
259 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
260 | ((xfs_bmbt_rec_base_t)blockcount & | |
1da177e4 LT |
261 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
262 | #else /* !XFS_BIG_BLKNOS */ | |
ddc6d3b3 | 263 | if (ISNULLSTARTBLOCK(startblock)) { |
1da177e4 | 264 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
8cba4344 | 265 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
1da177e4 LT |
266 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
267 | r->l1 = XFS_MASK64HI(11) | | |
8cba4344 CH |
268 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
269 | ((xfs_bmbt_rec_base_t)blockcount & | |
1da177e4 LT |
270 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
271 | } else { | |
272 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
8cba4344 CH |
273 | ((xfs_bmbt_rec_base_t)startoff << 9); |
274 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
275 | ((xfs_bmbt_rec_base_t)blockcount & | |
1da177e4 LT |
276 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
277 | } | |
278 | #endif /* XFS_BIG_BLKNOS */ | |
279 | } | |
280 | ||
1da177e4 LT |
281 | /* |
282 | * Set all the fields in a bmap extent record from the uncompressed form. | |
283 | */ | |
284 | void | |
8cba4344 CH |
285 | xfs_bmbt_set_all( |
286 | xfs_bmbt_rec_host_t *r, | |
287 | xfs_bmbt_irec_t *s) | |
1da177e4 | 288 | { |
8cba4344 CH |
289 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
290 | s->br_blockcount, s->br_state); | |
1da177e4 LT |
291 | } |
292 | ||
8cba4344 | 293 | |
1da177e4 LT |
294 | /* |
295 | * Set all the fields in a disk format bmap extent record from the arguments. | |
296 | */ | |
297 | void | |
298 | xfs_bmbt_disk_set_allf( | |
8cba4344 CH |
299 | xfs_bmbt_rec_t *r, |
300 | xfs_fileoff_t startoff, | |
301 | xfs_fsblock_t startblock, | |
302 | xfs_filblks_t blockcount, | |
303 | xfs_exntst_t state) | |
1da177e4 | 304 | { |
8cba4344 CH |
305 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
306 | ||
307 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
308 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); | |
309 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
1da177e4 | 310 | |
1da177e4 | 311 | #if XFS_BIG_BLKNOS |
8cba4344 CH |
312 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
313 | ||
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) | | |
317 | ((xfs_bmbt_rec_base_t)startblock >> 43)); | |
cd8b0a97 | 318 | r->l1 = cpu_to_be64( |
8cba4344 CH |
319 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
320 | ((xfs_bmbt_rec_base_t)blockcount & | |
321 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); | |
1da177e4 | 322 | #else /* !XFS_BIG_BLKNOS */ |
ddc6d3b3 | 323 | if (ISNULLSTARTBLOCK(startblock)) { |
cd8b0a97 | 324 | r->l0 = cpu_to_be64( |
8cba4344 CH |
325 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
326 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
327 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); | |
cd8b0a97 | 328 | r->l1 = cpu_to_be64(XFS_MASK64HI(11) | |
8cba4344 CH |
329 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
330 | ((xfs_bmbt_rec_base_t)blockcount & | |
1da177e4 LT |
331 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
332 | } else { | |
cd8b0a97 | 333 | r->l0 = cpu_to_be64( |
8cba4344 CH |
334 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
335 | ((xfs_bmbt_rec_base_t)startoff << 9)); | |
cd8b0a97 | 336 | r->l1 = cpu_to_be64( |
8cba4344 CH |
337 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
338 | ((xfs_bmbt_rec_base_t)blockcount & | |
339 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); | |
1da177e4 LT |
340 | } |
341 | #endif /* XFS_BIG_BLKNOS */ | |
342 | } | |
8cba4344 CH |
343 | |
344 | /* | |
345 | * Set all the fields in a bmap extent record from the uncompressed form. | |
346 | */ | |
347 | void | |
348 | xfs_bmbt_disk_set_all( | |
349 | xfs_bmbt_rec_t *r, | |
350 | xfs_bmbt_irec_t *s) | |
351 | { | |
352 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, | |
353 | s->br_blockcount, s->br_state); | |
354 | } | |
1da177e4 LT |
355 | |
356 | /* | |
357 | * Set the blockcount field in a bmap extent record. | |
358 | */ | |
359 | void | |
360 | xfs_bmbt_set_blockcount( | |
a6f64d4a | 361 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
362 | xfs_filblks_t v) |
363 | { | |
364 | ASSERT((v & XFS_MASK64HI(43)) == 0); | |
365 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) | | |
366 | (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21)); | |
367 | } | |
368 | ||
369 | /* | |
370 | * Set the startblock field in a bmap extent record. | |
371 | */ | |
372 | void | |
373 | xfs_bmbt_set_startblock( | |
a6f64d4a | 374 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
375 | xfs_fsblock_t v) |
376 | { | |
377 | #if XFS_BIG_BLKNOS | |
378 | ASSERT((v & XFS_MASK64HI(12)) == 0); | |
379 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) | | |
380 | (xfs_bmbt_rec_base_t)(v >> 43); | |
381 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) | | |
382 | (xfs_bmbt_rec_base_t)(v << 21); | |
383 | #else /* !XFS_BIG_BLKNOS */ | |
384 | if (ISNULLSTARTBLOCK(v)) { | |
385 | r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); | |
386 | r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) | | |
387 | ((xfs_bmbt_rec_base_t)v << 21) | | |
388 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); | |
389 | } else { | |
390 | r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9); | |
391 | r->l1 = ((xfs_bmbt_rec_base_t)v << 21) | | |
392 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); | |
393 | } | |
394 | #endif /* XFS_BIG_BLKNOS */ | |
395 | } | |
396 | ||
397 | /* | |
398 | * Set the startoff field in a bmap extent record. | |
399 | */ | |
400 | void | |
401 | xfs_bmbt_set_startoff( | |
a6f64d4a | 402 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
403 | xfs_fileoff_t v) |
404 | { | |
405 | ASSERT((v & XFS_MASK64HI(9)) == 0); | |
406 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) | | |
407 | ((xfs_bmbt_rec_base_t)v << 9) | | |
408 | (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); | |
409 | } | |
410 | ||
411 | /* | |
412 | * Set the extent state field in a bmap extent record. | |
413 | */ | |
414 | void | |
415 | xfs_bmbt_set_state( | |
a6f64d4a | 416 | xfs_bmbt_rec_host_t *r, |
1da177e4 LT |
417 | xfs_exntst_t v) |
418 | { | |
419 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); | |
420 | if (v == XFS_EXT_NORM) | |
421 | r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN); | |
422 | else | |
423 | r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN); | |
424 | } | |
425 | ||
426 | /* | |
427 | * Convert in-memory form of btree root to on-disk form. | |
428 | */ | |
429 | void | |
430 | xfs_bmbt_to_bmdr( | |
431 | xfs_bmbt_block_t *rblock, | |
432 | int rblocklen, | |
433 | xfs_bmdr_block_t *dblock, | |
434 | int dblocklen) | |
435 | { | |
436 | int dmxr; | |
437 | xfs_bmbt_key_t *fkp; | |
576039cf | 438 | __be64 *fpp; |
1da177e4 | 439 | xfs_bmbt_key_t *tkp; |
576039cf | 440 | __be64 *tpp; |
1da177e4 | 441 | |
16259e7d CH |
442 | ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC); |
443 | ASSERT(be64_to_cpu(rblock->bb_leftsib) == NULLDFSBNO); | |
444 | ASSERT(be64_to_cpu(rblock->bb_rightsib) == NULLDFSBNO); | |
445 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
446 | dblock->bb_level = rblock->bb_level; | |
447 | dblock->bb_numrecs = rblock->bb_numrecs; | |
1da177e4 LT |
448 | dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0); |
449 | fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen); | |
2c36dded | 450 | tkp = XFS_BTREE_KEY_ADDR(xfs_bmdr, dblock, 1); |
1da177e4 | 451 | fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen); |
2c36dded | 452 | tpp = XFS_BTREE_PTR_ADDR(xfs_bmdr, dblock, 1, dmxr); |
16259e7d | 453 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
1da177e4 | 454 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
576039cf | 455 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
1da177e4 LT |
456 | } |
457 | ||
1da177e4 | 458 | /* |
4eea22f0 | 459 | * Check extent records, which have just been read, for |
1da177e4 LT |
460 | * any bit in the extent flag field. ASSERT on debug |
461 | * kernels, as this condition should not occur. | |
462 | * Return an error condition (1) if any flags found, | |
463 | * otherwise return 0. | |
464 | */ | |
465 | ||
466 | int | |
467 | xfs_check_nostate_extents( | |
4eea22f0 MK |
468 | xfs_ifork_t *ifp, |
469 | xfs_extnum_t idx, | |
1da177e4 LT |
470 | xfs_extnum_t num) |
471 | { | |
4eea22f0 | 472 | for (; num > 0; num--, idx++) { |
a6f64d4a | 473 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
474 | if ((ep->l0 >> |
475 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { | |
476 | ASSERT(0); | |
477 | return 1; | |
478 | } | |
479 | } | |
480 | return 0; | |
481 | } | |
561f7d17 CH |
482 | |
483 | ||
484 | STATIC struct xfs_btree_cur * | |
485 | xfs_bmbt_dup_cursor( | |
486 | struct xfs_btree_cur *cur) | |
487 | { | |
488 | struct xfs_btree_cur *new; | |
489 | ||
490 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
491 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); | |
492 | ||
493 | /* | |
494 | * Copy the firstblock, flist, and flags values, | |
495 | * since init cursor doesn't get them. | |
496 | */ | |
497 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; | |
498 | new->bc_private.b.flist = cur->bc_private.b.flist; | |
499 | new->bc_private.b.flags = cur->bc_private.b.flags; | |
500 | ||
501 | return new; | |
502 | } | |
503 | ||
4b22a571 CH |
504 | STATIC void |
505 | xfs_bmbt_update_cursor( | |
506 | struct xfs_btree_cur *src, | |
507 | struct xfs_btree_cur *dst) | |
508 | { | |
509 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || | |
510 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); | |
511 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); | |
512 | ||
513 | dst->bc_private.b.allocated += src->bc_private.b.allocated; | |
514 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; | |
515 | ||
516 | src->bc_private.b.allocated = 0; | |
517 | } | |
518 | ||
f5eb8e7c CH |
519 | STATIC int |
520 | xfs_bmbt_alloc_block( | |
521 | struct xfs_btree_cur *cur, | |
522 | union xfs_btree_ptr *start, | |
523 | union xfs_btree_ptr *new, | |
524 | int length, | |
525 | int *stat) | |
526 | { | |
527 | xfs_alloc_arg_t args; /* block allocation args */ | |
528 | int error; /* error return value */ | |
529 | ||
530 | memset(&args, 0, sizeof(args)); | |
531 | args.tp = cur->bc_tp; | |
532 | args.mp = cur->bc_mp; | |
533 | args.fsbno = cur->bc_private.b.firstblock; | |
534 | args.firstblock = args.fsbno; | |
535 | ||
536 | if (args.fsbno == NULLFSBLOCK) { | |
537 | args.fsbno = be64_to_cpu(start->l); | |
538 | args.type = XFS_ALLOCTYPE_START_BNO; | |
539 | /* | |
540 | * Make sure there is sufficient room left in the AG to | |
541 | * complete a full tree split for an extent insert. If | |
542 | * we are converting the middle part of an extent then | |
543 | * we may need space for two tree splits. | |
544 | * | |
545 | * We are relying on the caller to make the correct block | |
546 | * reservation for this operation to succeed. If the | |
547 | * reservation amount is insufficient then we may fail a | |
548 | * block allocation here and corrupt the filesystem. | |
549 | */ | |
550 | args.minleft = xfs_trans_get_block_res(args.tp); | |
551 | } else if (cur->bc_private.b.flist->xbf_low) { | |
552 | args.type = XFS_ALLOCTYPE_START_BNO; | |
553 | } else { | |
554 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
555 | } | |
556 | ||
557 | args.minlen = args.maxlen = args.prod = 1; | |
558 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; | |
559 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { | |
560 | error = XFS_ERROR(ENOSPC); | |
561 | goto error0; | |
562 | } | |
563 | error = xfs_alloc_vextent(&args); | |
564 | if (error) | |
565 | goto error0; | |
566 | ||
567 | if (args.fsbno == NULLFSBLOCK && args.minleft) { | |
568 | /* | |
569 | * Could not find an AG with enough free space to satisfy | |
570 | * a full btree split. Try again without minleft and if | |
571 | * successful activate the lowspace algorithm. | |
572 | */ | |
573 | args.fsbno = 0; | |
574 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
575 | args.minleft = 0; | |
576 | error = xfs_alloc_vextent(&args); | |
577 | if (error) | |
578 | goto error0; | |
579 | cur->bc_private.b.flist->xbf_low = 1; | |
580 | } | |
581 | if (args.fsbno == NULLFSBLOCK) { | |
582 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
583 | *stat = 0; | |
584 | return 0; | |
585 | } | |
586 | ASSERT(args.len == 1); | |
587 | cur->bc_private.b.firstblock = args.fsbno; | |
588 | cur->bc_private.b.allocated++; | |
589 | cur->bc_private.b.ip->i_d.di_nblocks++; | |
590 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); | |
591 | XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip, | |
592 | XFS_TRANS_DQ_BCOUNT, 1L); | |
593 | ||
594 | new->l = cpu_to_be64(args.fsbno); | |
595 | ||
596 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
597 | *stat = 1; | |
598 | return 0; | |
599 | ||
600 | error0: | |
601 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
602 | return error; | |
603 | } | |
604 | ||
d4b3a4b7 CH |
605 | STATIC int |
606 | xfs_bmbt_free_block( | |
607 | struct xfs_btree_cur *cur, | |
608 | struct xfs_buf *bp) | |
609 | { | |
610 | struct xfs_mount *mp = cur->bc_mp; | |
611 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
612 | struct xfs_trans *tp = cur->bc_tp; | |
613 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); | |
614 | ||
615 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); | |
616 | ip->i_d.di_nblocks--; | |
617 | ||
618 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
619 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); | |
620 | xfs_trans_binval(tp, bp); | |
621 | return 0; | |
622 | } | |
623 | ||
91cca5df CH |
624 | STATIC int |
625 | xfs_bmbt_get_minrecs( | |
626 | struct xfs_btree_cur *cur, | |
627 | int level) | |
628 | { | |
629 | return XFS_BMAP_BLOCK_IMINRECS(level, cur); | |
630 | } | |
631 | ||
ce5e42db CH |
632 | STATIC int |
633 | xfs_bmbt_get_maxrecs( | |
634 | struct xfs_btree_cur *cur, | |
635 | int level) | |
636 | { | |
637 | return XFS_BMAP_BLOCK_IMAXRECS(level, cur); | |
638 | } | |
639 | ||
4b22a571 CH |
640 | /* |
641 | * Get the maximum records we could store in the on-disk format. | |
642 | * | |
643 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but | |
644 | * for the root node this checks the available space in the dinode fork | |
645 | * so that we can resize the in-memory buffer to match it. After a | |
646 | * resize to the maximum size this function returns the same value | |
647 | * as xfs_bmbt_get_maxrecs for the root node, too. | |
648 | */ | |
649 | STATIC int | |
650 | xfs_bmbt_get_dmaxrecs( | |
651 | struct xfs_btree_cur *cur, | |
652 | int level) | |
653 | { | |
654 | return XFS_BMAP_BLOCK_DMAXRECS(level, cur); | |
655 | } | |
656 | ||
fe033cc8 CH |
657 | STATIC void |
658 | xfs_bmbt_init_key_from_rec( | |
659 | union xfs_btree_key *key, | |
660 | union xfs_btree_rec *rec) | |
661 | { | |
662 | key->bmbt.br_startoff = | |
663 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); | |
664 | } | |
665 | ||
4b22a571 CH |
666 | STATIC void |
667 | xfs_bmbt_init_rec_from_key( | |
668 | union xfs_btree_key *key, | |
669 | union xfs_btree_rec *rec) | |
670 | { | |
671 | ASSERT(key->bmbt.br_startoff != 0); | |
672 | ||
673 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), | |
674 | 0, 0, XFS_EXT_NORM); | |
675 | } | |
676 | ||
677 | STATIC void | |
678 | xfs_bmbt_init_rec_from_cur( | |
679 | struct xfs_btree_cur *cur, | |
680 | union xfs_btree_rec *rec) | |
681 | { | |
682 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); | |
683 | } | |
684 | ||
fe033cc8 CH |
685 | STATIC void |
686 | xfs_bmbt_init_ptr_from_cur( | |
687 | struct xfs_btree_cur *cur, | |
688 | union xfs_btree_ptr *ptr) | |
689 | { | |
690 | ptr->l = 0; | |
691 | } | |
692 | ||
693 | STATIC __int64_t | |
694 | xfs_bmbt_key_diff( | |
695 | struct xfs_btree_cur *cur, | |
696 | union xfs_btree_key *key) | |
697 | { | |
698 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - | |
699 | cur->bc_rec.b.br_startoff; | |
700 | } | |
701 | ||
4a26e66e CH |
702 | #ifdef DEBUG |
703 | STATIC int | |
704 | xfs_bmbt_keys_inorder( | |
705 | struct xfs_btree_cur *cur, | |
706 | union xfs_btree_key *k1, | |
707 | union xfs_btree_key *k2) | |
708 | { | |
709 | return be64_to_cpu(k1->bmbt.br_startoff) < | |
710 | be64_to_cpu(k2->bmbt.br_startoff); | |
711 | } | |
712 | ||
713 | STATIC int | |
714 | xfs_bmbt_recs_inorder( | |
715 | struct xfs_btree_cur *cur, | |
716 | union xfs_btree_rec *r1, | |
717 | union xfs_btree_rec *r2) | |
718 | { | |
719 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + | |
720 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= | |
721 | xfs_bmbt_disk_get_startoff(&r2->bmbt); | |
722 | } | |
723 | #endif /* DEBUG */ | |
724 | ||
8c4ed633 CH |
725 | #ifdef XFS_BTREE_TRACE |
726 | ktrace_t *xfs_bmbt_trace_buf; | |
727 | ||
728 | STATIC void | |
729 | xfs_bmbt_trace_enter( | |
730 | struct xfs_btree_cur *cur, | |
731 | const char *func, | |
732 | char *s, | |
733 | int type, | |
734 | int line, | |
735 | __psunsigned_t a0, | |
736 | __psunsigned_t a1, | |
737 | __psunsigned_t a2, | |
738 | __psunsigned_t a3, | |
739 | __psunsigned_t a4, | |
740 | __psunsigned_t a5, | |
741 | __psunsigned_t a6, | |
742 | __psunsigned_t a7, | |
743 | __psunsigned_t a8, | |
744 | __psunsigned_t a9, | |
745 | __psunsigned_t a10) | |
746 | { | |
747 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
748 | int whichfork = cur->bc_private.b.whichfork; | |
749 | ||
750 | ktrace_enter(xfs_bmbt_trace_buf, | |
751 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), | |
752 | (void *)func, (void *)s, (void *)ip, (void *)cur, | |
753 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, | |
754 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, | |
755 | (void *)a8, (void *)a9, (void *)a10); | |
756 | ktrace_enter(ip->i_btrace, | |
757 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), | |
758 | (void *)func, (void *)s, (void *)ip, (void *)cur, | |
759 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, | |
760 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, | |
761 | (void *)a8, (void *)a9, (void *)a10); | |
762 | } | |
763 | ||
764 | STATIC void | |
765 | xfs_bmbt_trace_cursor( | |
766 | struct xfs_btree_cur *cur, | |
767 | __uint32_t *s0, | |
768 | __uint64_t *l0, | |
769 | __uint64_t *l1) | |
770 | { | |
771 | struct xfs_bmbt_rec_host r; | |
772 | ||
773 | xfs_bmbt_set_all(&r, &cur->bc_rec.b); | |
774 | ||
775 | *s0 = (cur->bc_nlevels << 24) | | |
776 | (cur->bc_private.b.flags << 16) | | |
777 | cur->bc_private.b.allocated; | |
778 | *l0 = r.l0; | |
779 | *l1 = r.l1; | |
780 | } | |
781 | ||
782 | STATIC void | |
783 | xfs_bmbt_trace_key( | |
784 | struct xfs_btree_cur *cur, | |
785 | union xfs_btree_key *key, | |
786 | __uint64_t *l0, | |
787 | __uint64_t *l1) | |
788 | { | |
789 | *l0 = be64_to_cpu(key->bmbt.br_startoff); | |
790 | *l1 = 0; | |
791 | } | |
792 | ||
793 | STATIC void | |
794 | xfs_bmbt_trace_record( | |
795 | struct xfs_btree_cur *cur, | |
796 | union xfs_btree_rec *rec, | |
797 | __uint64_t *l0, | |
798 | __uint64_t *l1, | |
799 | __uint64_t *l2) | |
800 | { | |
801 | struct xfs_bmbt_irec irec; | |
802 | ||
803 | xfs_bmbt_disk_get_all(&rec->bmbt, &irec); | |
804 | *l0 = irec.br_startoff; | |
805 | *l1 = irec.br_startblock; | |
806 | *l2 = irec.br_blockcount; | |
807 | } | |
808 | #endif /* XFS_BTREE_TRACE */ | |
809 | ||
561f7d17 | 810 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
65f1eaea CH |
811 | .rec_len = sizeof(xfs_bmbt_rec_t), |
812 | .key_len = sizeof(xfs_bmbt_key_t), | |
813 | ||
561f7d17 | 814 | .dup_cursor = xfs_bmbt_dup_cursor, |
4b22a571 | 815 | .update_cursor = xfs_bmbt_update_cursor, |
f5eb8e7c | 816 | .alloc_block = xfs_bmbt_alloc_block, |
d4b3a4b7 | 817 | .free_block = xfs_bmbt_free_block, |
ce5e42db | 818 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
91cca5df | 819 | .get_minrecs = xfs_bmbt_get_minrecs, |
4b22a571 | 820 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
fe033cc8 | 821 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
4b22a571 CH |
822 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, |
823 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, | |
fe033cc8 CH |
824 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
825 | .key_diff = xfs_bmbt_key_diff, | |
8c4ed633 | 826 | |
4a26e66e CH |
827 | #ifdef DEBUG |
828 | .keys_inorder = xfs_bmbt_keys_inorder, | |
829 | .recs_inorder = xfs_bmbt_recs_inorder, | |
830 | #endif | |
831 | ||
8c4ed633 CH |
832 | #ifdef XFS_BTREE_TRACE |
833 | .trace_enter = xfs_bmbt_trace_enter, | |
834 | .trace_cursor = xfs_bmbt_trace_cursor, | |
835 | .trace_key = xfs_bmbt_trace_key, | |
836 | .trace_record = xfs_bmbt_trace_record, | |
837 | #endif | |
561f7d17 CH |
838 | }; |
839 | ||
840 | /* | |
841 | * Allocate a new bmap btree cursor. | |
842 | */ | |
843 | struct xfs_btree_cur * /* new bmap btree cursor */ | |
844 | xfs_bmbt_init_cursor( | |
845 | struct xfs_mount *mp, /* file system mount point */ | |
846 | struct xfs_trans *tp, /* transaction pointer */ | |
847 | struct xfs_inode *ip, /* inode owning the btree */ | |
848 | int whichfork) /* data or attr fork */ | |
849 | { | |
850 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
851 | struct xfs_btree_cur *cur; | |
852 | ||
853 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
854 | ||
855 | cur->bc_tp = tp; | |
856 | cur->bc_mp = mp; | |
857 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
858 | cur->bc_btnum = XFS_BTNUM_BMAP; | |
859 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
860 | ||
861 | cur->bc_ops = &xfs_bmbt_ops; | |
e99ab90d | 862 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
561f7d17 CH |
863 | |
864 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); | |
865 | cur->bc_private.b.ip = ip; | |
866 | cur->bc_private.b.firstblock = NULLFSBLOCK; | |
867 | cur->bc_private.b.flist = NULL; | |
868 | cur->bc_private.b.allocated = 0; | |
869 | cur->bc_private.b.flags = 0; | |
870 | cur->bc_private.b.whichfork = whichfork; | |
871 | ||
872 | return cur; | |
873 | } |