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Commit | Line | Data |
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2bd0ea18 | 1 | /* |
da23017d NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
5000d01d | 4 | * |
da23017d 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 | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
5000d01d | 8 | * |
da23017d 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. | |
5000d01d | 13 | * |
da23017d 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 | |
2bd0ea18 | 17 | */ |
2bd0ea18 NS |
18 | #include <xfs.h> |
19 | ||
2bd0ea18 NS |
20 | /* |
21 | * Determine the extent state. | |
22 | */ | |
23 | /* ARGSUSED */ | |
24 | STATIC xfs_exntst_t | |
25 | xfs_extent_state( | |
26 | xfs_filblks_t blks, | |
27 | int extent_flag) | |
28 | { | |
29 | if (extent_flag) { | |
30 | ASSERT(blks != 0); /* saved for DMIG */ | |
31 | return XFS_EXT_UNWRITTEN; | |
32 | } | |
33 | return XFS_EXT_NORM; | |
34 | } | |
35 | ||
2bd0ea18 NS |
36 | /* |
37 | * Convert on-disk form of btree root to in-memory form. | |
38 | */ | |
39 | void | |
40 | xfs_bmdr_to_bmbt( | |
b3563c19 | 41 | struct xfs_mount *mp, |
2bd0ea18 NS |
42 | xfs_bmdr_block_t *dblock, |
43 | int dblocklen, | |
b3563c19 | 44 | struct xfs_btree_block *rblock, |
2bd0ea18 NS |
45 | int rblocklen) |
46 | { | |
47 | int dmxr; | |
48 | xfs_bmbt_key_t *fkp; | |
5e656dbb | 49 | __be64 *fpp; |
2bd0ea18 | 50 | xfs_bmbt_key_t *tkp; |
5e656dbb | 51 | __be64 *tpp; |
2bd0ea18 | 52 | |
6e3140c7 NS |
53 | rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
54 | rblock->bb_level = dblock->bb_level; | |
55 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); | |
56 | rblock->bb_numrecs = dblock->bb_numrecs; | |
b3563c19 BN |
57 | rblock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO); |
58 | rblock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO); | |
59 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); | |
60 | fkp = XFS_BMDR_KEY_ADDR(dblock, 1); | |
61 | tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); | |
62 | fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); | |
63 | tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); | |
6e3140c7 | 64 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
32181a02 | 65 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
5e656dbb | 66 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
2bd0ea18 NS |
67 | } |
68 | ||
2bd0ea18 NS |
69 | /* |
70 | * Convert a compressed bmap extent record to an uncompressed form. | |
71 | * This code must be in sync with the routines xfs_bmbt_get_startoff, | |
72 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. | |
73 | */ | |
dfc130f3 | 74 | |
5e656dbb | 75 | STATIC_INLINE void |
f9e56f43 NS |
76 | __xfs_bmbt_get_all( |
77 | __uint64_t l0, | |
78 | __uint64_t l1, | |
79 | xfs_bmbt_irec_t *s) | |
2bd0ea18 NS |
80 | { |
81 | int ext_flag; | |
82 | xfs_exntst_t st; | |
83 | ||
4542f191 NS |
84 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); |
85 | s->br_startoff = ((xfs_fileoff_t)l0 & | |
2bd0ea18 | 86 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
2b288ccf | 87 | #if XFS_BIG_BLKNOS |
4542f191 NS |
88 | s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) | |
89 | (((xfs_fsblock_t)l1) >> 21); | |
2bd0ea18 NS |
90 | #else |
91 | #ifdef DEBUG | |
92 | { | |
93 | xfs_dfsbno_t b; | |
94 | ||
4542f191 NS |
95 | b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) | |
96 | (((xfs_dfsbno_t)l1) >> 21); | |
2bd0ea18 NS |
97 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); |
98 | s->br_startblock = (xfs_fsblock_t)b; | |
99 | } | |
100 | #else /* !DEBUG */ | |
4542f191 | 101 | s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21); |
2bd0ea18 | 102 | #endif /* DEBUG */ |
2b288ccf | 103 | #endif /* XFS_BIG_BLKNOS */ |
4542f191 | 104 | s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21)); |
2bd0ea18 NS |
105 | /* This is xfs_extent_state() in-line */ |
106 | if (ext_flag) { | |
107 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ | |
108 | st = XFS_EXT_UNWRITTEN; | |
109 | } else | |
110 | st = XFS_EXT_NORM; | |
111 | s->br_state = st; | |
112 | } | |
113 | ||
f9e56f43 NS |
114 | void |
115 | xfs_bmbt_get_all( | |
5e656dbb | 116 | xfs_bmbt_rec_host_t *r, |
f9e56f43 NS |
117 | xfs_bmbt_irec_t *s) |
118 | { | |
119 | __xfs_bmbt_get_all(r->l0, r->l1, s); | |
120 | } | |
121 | ||
2bd0ea18 | 122 | /* |
b34acbba | 123 | * Extract the blockcount field from an in memory bmap extent record. |
2bd0ea18 NS |
124 | */ |
125 | xfs_filblks_t | |
126 | xfs_bmbt_get_blockcount( | |
5e656dbb | 127 | xfs_bmbt_rec_host_t *r) |
2bd0ea18 | 128 | { |
f9e56f43 | 129 | return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21)); |
2bd0ea18 NS |
130 | } |
131 | ||
132 | /* | |
b34acbba | 133 | * Extract the startblock field from an in memory bmap extent record. |
2bd0ea18 NS |
134 | */ |
135 | xfs_fsblock_t | |
136 | xfs_bmbt_get_startblock( | |
5e656dbb | 137 | xfs_bmbt_rec_host_t *r) |
2bd0ea18 | 138 | { |
2b288ccf | 139 | #if XFS_BIG_BLKNOS |
f9e56f43 NS |
140 | return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) | |
141 | (((xfs_fsblock_t)r->l1) >> 21); | |
142 | #else | |
143 | #ifdef DEBUG | |
144 | xfs_dfsbno_t b; | |
145 | ||
146 | b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) | | |
147 | (((xfs_dfsbno_t)r->l1) >> 21); | |
148 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); | |
149 | return (xfs_fsblock_t)b; | |
150 | #else /* !DEBUG */ | |
151 | return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21); | |
152 | #endif /* DEBUG */ | |
2b288ccf | 153 | #endif /* XFS_BIG_BLKNOS */ |
f9e56f43 NS |
154 | } |
155 | ||
156 | /* | |
b34acbba | 157 | * Extract the startoff field from an in memory bmap extent record. |
f9e56f43 NS |
158 | */ |
159 | xfs_fileoff_t | |
160 | xfs_bmbt_get_startoff( | |
5e656dbb | 161 | xfs_bmbt_rec_host_t *r) |
f9e56f43 NS |
162 | { |
163 | return ((xfs_fileoff_t)r->l0 & | |
164 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; | |
165 | } | |
166 | ||
167 | xfs_exntst_t | |
168 | xfs_bmbt_get_state( | |
5e656dbb | 169 | xfs_bmbt_rec_host_t *r) |
f9e56f43 NS |
170 | { |
171 | int ext_flag; | |
172 | ||
173 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); | |
174 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), | |
b194c7d8 | 175 | ext_flag); |
2bd0ea18 NS |
176 | } |
177 | ||
b194c7d8 | 178 | /* Endian flipping versions of the bmbt extraction functions */ |
2bd0ea18 | 179 | void |
b194c7d8 BN |
180 | xfs_bmbt_disk_get_all( |
181 | xfs_bmbt_rec_t *r, | |
182 | xfs_bmbt_irec_t *s) | |
2bd0ea18 | 183 | { |
9c32ccfc BN |
184 | __xfs_bmbt_get_all(get_unaligned_be64(&r->l0), |
185 | get_unaligned_be64(&r->l1), s); | |
2bd0ea18 NS |
186 | } |
187 | ||
188 | /* | |
b194c7d8 | 189 | * Extract the blockcount field from an on disk bmap extent record. |
2bd0ea18 | 190 | */ |
b194c7d8 BN |
191 | xfs_filblks_t |
192 | xfs_bmbt_disk_get_blockcount( | |
193 | xfs_bmbt_rec_t *r) | |
2bd0ea18 | 194 | { |
b194c7d8 | 195 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & XFS_MASK64LO(21)); |
2bd0ea18 NS |
196 | } |
197 | ||
2bd0ea18 | 198 | /* |
b194c7d8 | 199 | * Extract the startoff field from a disk format bmap extent record. |
2bd0ea18 | 200 | */ |
b194c7d8 BN |
201 | xfs_fileoff_t |
202 | xfs_bmbt_disk_get_startoff( | |
203 | xfs_bmbt_rec_t *r) | |
2bd0ea18 | 204 | { |
b194c7d8 BN |
205 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
206 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; | |
2bd0ea18 NS |
207 | } |
208 | ||
b194c7d8 | 209 | |
f9e56f43 NS |
210 | /* |
211 | * Set all the fields in a bmap extent record from the arguments. | |
212 | */ | |
213 | void | |
214 | xfs_bmbt_set_allf( | |
5e656dbb BN |
215 | xfs_bmbt_rec_host_t *r, |
216 | xfs_fileoff_t startoff, | |
217 | xfs_fsblock_t startblock, | |
218 | xfs_filblks_t blockcount, | |
219 | xfs_exntst_t state) | |
f9e56f43 | 220 | { |
5e656dbb BN |
221 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
222 | ||
223 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
224 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); | |
225 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
f9e56f43 | 226 | |
2b288ccf | 227 | #if XFS_BIG_BLKNOS |
5e656dbb BN |
228 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
229 | ||
f9e56f43 | 230 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
5e656dbb BN |
231 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
232 | ((xfs_bmbt_rec_base_t)startblock >> 43); | |
233 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
234 | ((xfs_bmbt_rec_base_t)blockcount & | |
f9e56f43 | 235 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
2b288ccf | 236 | #else /* !XFS_BIG_BLKNOS */ |
5e656dbb | 237 | if (ISNULLSTARTBLOCK(startblock)) { |
f9e56f43 | 238 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
5e656dbb | 239 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
f9e56f43 NS |
240 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
241 | r->l1 = XFS_MASK64HI(11) | | |
5e656dbb BN |
242 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
243 | ((xfs_bmbt_rec_base_t)blockcount & | |
f9e56f43 NS |
244 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
245 | } else { | |
246 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
5e656dbb BN |
247 | ((xfs_bmbt_rec_base_t)startoff << 9); |
248 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | | |
249 | ((xfs_bmbt_rec_base_t)blockcount & | |
f9e56f43 NS |
250 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
251 | } | |
2b288ccf | 252 | #endif /* XFS_BIG_BLKNOS */ |
f9e56f43 NS |
253 | } |
254 | ||
f9e56f43 NS |
255 | /* |
256 | * Set all the fields in a bmap extent record from the uncompressed form. | |
257 | */ | |
258 | void | |
5e656dbb BN |
259 | xfs_bmbt_set_all( |
260 | xfs_bmbt_rec_host_t *r, | |
261 | xfs_bmbt_irec_t *s) | |
f9e56f43 | 262 | { |
5e656dbb BN |
263 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
264 | s->br_blockcount, s->br_state); | |
2bd0ea18 NS |
265 | } |
266 | ||
5e656dbb | 267 | |
2bd0ea18 | 268 | /* |
f9e56f43 | 269 | * Set all the fields in a disk format bmap extent record from the arguments. |
2bd0ea18 NS |
270 | */ |
271 | void | |
f9e56f43 | 272 | xfs_bmbt_disk_set_allf( |
5e656dbb BN |
273 | xfs_bmbt_rec_t *r, |
274 | xfs_fileoff_t startoff, | |
275 | xfs_fsblock_t startblock, | |
276 | xfs_filblks_t blockcount, | |
277 | xfs_exntst_t state) | |
2bd0ea18 | 278 | { |
5e656dbb BN |
279 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
280 | ||
281 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); | |
282 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); | |
283 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); | |
2bd0ea18 | 284 | |
2b288ccf | 285 | #if XFS_BIG_BLKNOS |
5e656dbb BN |
286 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
287 | ||
288 | r->l0 = cpu_to_be64( | |
289 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
290 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
291 | ((xfs_bmbt_rec_base_t)startblock >> 43)); | |
292 | r->l1 = cpu_to_be64( | |
293 | ((xfs_bmbt_rec_base_t)startblock << 21) | | |
294 | ((xfs_bmbt_rec_base_t)blockcount & | |
295 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); | |
2b288ccf | 296 | #else /* !XFS_BIG_BLKNOS */ |
5e656dbb BN |
297 | if (ISNULLSTARTBLOCK(startblock)) { |
298 | r->l0 = cpu_to_be64( | |
299 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
300 | ((xfs_bmbt_rec_base_t)startoff << 9) | | |
301 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); | |
302 | r->l1 = cpu_to_be64(XFS_MASK64HI(11) | | |
303 | ((xfs_bmbt_rec_base_t)startblock << 21) | | |
304 | ((xfs_bmbt_rec_base_t)blockcount & | |
2bd0ea18 NS |
305 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
306 | } else { | |
5e656dbb BN |
307 | r->l0 = cpu_to_be64( |
308 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | | |
309 | ((xfs_bmbt_rec_base_t)startoff << 9)); | |
310 | r->l1 = cpu_to_be64( | |
311 | ((xfs_bmbt_rec_base_t)startblock << 21) | | |
312 | ((xfs_bmbt_rec_base_t)blockcount & | |
313 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); | |
2bd0ea18 | 314 | } |
2b288ccf | 315 | #endif /* XFS_BIG_BLKNOS */ |
2bd0ea18 | 316 | } |
5e656dbb BN |
317 | |
318 | /* | |
319 | * Set all the fields in a bmap extent record from the uncompressed form. | |
320 | */ | |
321 | void | |
322 | xfs_bmbt_disk_set_all( | |
323 | xfs_bmbt_rec_t *r, | |
324 | xfs_bmbt_irec_t *s) | |
325 | { | |
326 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, | |
327 | s->br_blockcount, s->br_state); | |
328 | } | |
2bd0ea18 NS |
329 | |
330 | /* | |
331 | * Set the blockcount field in a bmap extent record. | |
332 | */ | |
333 | void | |
334 | xfs_bmbt_set_blockcount( | |
5e656dbb | 335 | xfs_bmbt_rec_host_t *r, |
2bd0ea18 NS |
336 | xfs_filblks_t v) |
337 | { | |
2bd0ea18 | 338 | ASSERT((v & XFS_MASK64HI(43)) == 0); |
f9e56f43 NS |
339 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) | |
340 | (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21)); | |
2bd0ea18 NS |
341 | } |
342 | ||
343 | /* | |
344 | * Set the startblock field in a bmap extent record. | |
345 | */ | |
346 | void | |
347 | xfs_bmbt_set_startblock( | |
5e656dbb | 348 | xfs_bmbt_rec_host_t *r, |
2bd0ea18 NS |
349 | xfs_fsblock_t v) |
350 | { | |
2b288ccf | 351 | #if XFS_BIG_BLKNOS |
2bd0ea18 | 352 | ASSERT((v & XFS_MASK64HI(12)) == 0); |
f9e56f43 NS |
353 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) | |
354 | (xfs_bmbt_rec_base_t)(v >> 43); | |
355 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) | | |
356 | (xfs_bmbt_rec_base_t)(v << 21); | |
2b288ccf | 357 | #else /* !XFS_BIG_BLKNOS */ |
2bd0ea18 | 358 | if (ISNULLSTARTBLOCK(v)) { |
f9e56f43 NS |
359 | r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
360 | r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) | | |
2bd0ea18 | 361 | ((xfs_bmbt_rec_base_t)v << 21) | |
f9e56f43 | 362 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
2bd0ea18 | 363 | } else { |
f9e56f43 NS |
364 | r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
365 | r->l1 = ((xfs_bmbt_rec_base_t)v << 21) | | |
366 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); | |
2bd0ea18 | 367 | } |
2b288ccf | 368 | #endif /* XFS_BIG_BLKNOS */ |
2bd0ea18 NS |
369 | } |
370 | ||
371 | /* | |
372 | * Set the startoff field in a bmap extent record. | |
373 | */ | |
374 | void | |
375 | xfs_bmbt_set_startoff( | |
5e656dbb | 376 | xfs_bmbt_rec_host_t *r, |
2bd0ea18 NS |
377 | xfs_fileoff_t v) |
378 | { | |
2bd0ea18 | 379 | ASSERT((v & XFS_MASK64HI(9)) == 0); |
f9e56f43 | 380 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) | |
2bd0ea18 | 381 | ((xfs_bmbt_rec_base_t)v << 9) | |
f9e56f43 | 382 | (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); |
2bd0ea18 NS |
383 | } |
384 | ||
385 | /* | |
386 | * Set the extent state field in a bmap extent record. | |
387 | */ | |
388 | void | |
389 | xfs_bmbt_set_state( | |
5e656dbb | 390 | xfs_bmbt_rec_host_t *r, |
2bd0ea18 NS |
391 | xfs_exntst_t v) |
392 | { | |
393 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); | |
394 | if (v == XFS_EXT_NORM) | |
f9e56f43 | 395 | r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN); |
2bd0ea18 | 396 | else |
f9e56f43 | 397 | r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN); |
2bd0ea18 NS |
398 | } |
399 | ||
400 | /* | |
401 | * Convert in-memory form of btree root to on-disk form. | |
402 | */ | |
403 | void | |
404 | xfs_bmbt_to_bmdr( | |
b3563c19 BN |
405 | struct xfs_mount *mp, |
406 | struct xfs_btree_block *rblock, | |
2bd0ea18 NS |
407 | int rblocklen, |
408 | xfs_bmdr_block_t *dblock, | |
409 | int dblocklen) | |
410 | { | |
411 | int dmxr; | |
412 | xfs_bmbt_key_t *fkp; | |
5e656dbb | 413 | __be64 *fpp; |
2bd0ea18 | 414 | xfs_bmbt_key_t *tkp; |
5e656dbb | 415 | __be64 *tpp; |
2bd0ea18 | 416 | |
6e3140c7 | 417 | ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC); |
b3563c19 BN |
418 | ASSERT(be64_to_cpu(rblock->bb_u.l.bb_leftsib) == NULLDFSBNO); |
419 | ASSERT(be64_to_cpu(rblock->bb_u.l.bb_rightsib) == NULLDFSBNO); | |
6e3140c7 NS |
420 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); |
421 | dblock->bb_level = rblock->bb_level; | |
422 | dblock->bb_numrecs = rblock->bb_numrecs; | |
b3563c19 BN |
423 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
424 | fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); | |
425 | tkp = XFS_BMDR_KEY_ADDR(dblock, 1); | |
426 | fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); | |
427 | tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); | |
6e3140c7 | 428 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
32181a02 | 429 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
5e656dbb | 430 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
2bd0ea18 NS |
431 | } |
432 | ||
2bd0ea18 | 433 | /* |
5e656dbb | 434 | * Check extent records, which have just been read, for |
2bd0ea18 NS |
435 | * any bit in the extent flag field. ASSERT on debug |
436 | * kernels, as this condition should not occur. | |
437 | * Return an error condition (1) if any flags found, | |
438 | * otherwise return 0. | |
439 | */ | |
dfc130f3 | 440 | |
2bd0ea18 NS |
441 | int |
442 | xfs_check_nostate_extents( | |
5e656dbb BN |
443 | xfs_ifork_t *ifp, |
444 | xfs_extnum_t idx, | |
2bd0ea18 NS |
445 | xfs_extnum_t num) |
446 | { | |
5e656dbb BN |
447 | for (; num > 0; num--, idx++) { |
448 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); | |
f9e56f43 | 449 | if ((ep->l0 >> |
4542f191 | 450 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { |
2bd0ea18 NS |
451 | ASSERT(0); |
452 | return 1; | |
453 | } | |
454 | } | |
455 | return 0; | |
456 | } | |
b194c7d8 BN |
457 | |
458 | ||
459 | STATIC struct xfs_btree_cur * | |
460 | xfs_bmbt_dup_cursor( | |
461 | struct xfs_btree_cur *cur) | |
462 | { | |
463 | struct xfs_btree_cur *new; | |
464 | ||
465 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
466 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); | |
467 | ||
468 | /* | |
469 | * Copy the firstblock, flist, and flags values, | |
470 | * since init cursor doesn't get them. | |
471 | */ | |
472 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; | |
473 | new->bc_private.b.flist = cur->bc_private.b.flist; | |
474 | new->bc_private.b.flags = cur->bc_private.b.flags; | |
475 | ||
476 | return new; | |
477 | } | |
478 | ||
479 | STATIC void | |
480 | xfs_bmbt_update_cursor( | |
481 | struct xfs_btree_cur *src, | |
482 | struct xfs_btree_cur *dst) | |
483 | { | |
484 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || | |
485 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); | |
486 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); | |
487 | ||
488 | dst->bc_private.b.allocated += src->bc_private.b.allocated; | |
489 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; | |
490 | ||
491 | src->bc_private.b.allocated = 0; | |
492 | } | |
493 | ||
494 | STATIC int | |
495 | xfs_bmbt_alloc_block( | |
496 | struct xfs_btree_cur *cur, | |
497 | union xfs_btree_ptr *start, | |
498 | union xfs_btree_ptr *new, | |
499 | int length, | |
500 | int *stat) | |
501 | { | |
502 | xfs_alloc_arg_t args; /* block allocation args */ | |
503 | int error; /* error return value */ | |
504 | ||
505 | memset(&args, 0, sizeof(args)); | |
506 | args.tp = cur->bc_tp; | |
507 | args.mp = cur->bc_mp; | |
508 | args.fsbno = cur->bc_private.b.firstblock; | |
509 | args.firstblock = args.fsbno; | |
510 | ||
511 | if (args.fsbno == NULLFSBLOCK) { | |
512 | args.fsbno = be64_to_cpu(start->l); | |
513 | args.type = XFS_ALLOCTYPE_START_BNO; | |
514 | /* | |
515 | * Make sure there is sufficient room left in the AG to | |
516 | * complete a full tree split for an extent insert. If | |
517 | * we are converting the middle part of an extent then | |
518 | * we may need space for two tree splits. | |
519 | * | |
520 | * We are relying on the caller to make the correct block | |
521 | * reservation for this operation to succeed. If the | |
522 | * reservation amount is insufficient then we may fail a | |
523 | * block allocation here and corrupt the filesystem. | |
524 | */ | |
525 | args.minleft = xfs_trans_get_block_res(args.tp); | |
526 | } else if (cur->bc_private.b.flist->xbf_low) { | |
527 | args.type = XFS_ALLOCTYPE_START_BNO; | |
528 | } else { | |
529 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
530 | } | |
531 | ||
532 | args.minlen = args.maxlen = args.prod = 1; | |
533 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; | |
534 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { | |
535 | error = XFS_ERROR(ENOSPC); | |
536 | goto error0; | |
537 | } | |
538 | error = xfs_alloc_vextent(&args); | |
539 | if (error) | |
540 | goto error0; | |
541 | ||
542 | if (args.fsbno == NULLFSBLOCK && args.minleft) { | |
543 | /* | |
544 | * Could not find an AG with enough free space to satisfy | |
545 | * a full btree split. Try again without minleft and if | |
546 | * successful activate the lowspace algorithm. | |
547 | */ | |
548 | args.fsbno = 0; | |
549 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
550 | args.minleft = 0; | |
551 | error = xfs_alloc_vextent(&args); | |
552 | if (error) | |
553 | goto error0; | |
554 | cur->bc_private.b.flist->xbf_low = 1; | |
555 | } | |
556 | if (args.fsbno == NULLFSBLOCK) { | |
557 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
558 | *stat = 0; | |
559 | return 0; | |
560 | } | |
561 | ASSERT(args.len == 1); | |
562 | cur->bc_private.b.firstblock = args.fsbno; | |
563 | cur->bc_private.b.allocated++; | |
564 | cur->bc_private.b.ip->i_d.di_nblocks++; | |
565 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); | |
566 | XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip, | |
567 | XFS_TRANS_DQ_BCOUNT, 1L); | |
568 | ||
569 | new->l = cpu_to_be64(args.fsbno); | |
570 | ||
571 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
572 | *stat = 1; | |
573 | return 0; | |
574 | ||
575 | error0: | |
576 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
577 | return error; | |
578 | } | |
579 | ||
580 | STATIC int | |
581 | xfs_bmbt_free_block( | |
582 | struct xfs_btree_cur *cur, | |
583 | struct xfs_buf *bp) | |
584 | { | |
585 | struct xfs_mount *mp = cur->bc_mp; | |
586 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
587 | struct xfs_trans *tp = cur->bc_tp; | |
588 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); | |
589 | ||
590 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); | |
591 | ip->i_d.di_nblocks--; | |
592 | ||
593 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
594 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); | |
595 | xfs_trans_binval(tp, bp); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | STATIC int | |
600 | xfs_bmbt_get_minrecs( | |
601 | struct xfs_btree_cur *cur, | |
602 | int level) | |
603 | { | |
b3563c19 BN |
604 | if (level == cur->bc_nlevels - 1) { |
605 | struct xfs_ifork *ifp; | |
606 | ||
607 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
608 | cur->bc_private.b.whichfork); | |
609 | ||
610 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
611 | ifp->if_broot_bytes, level == 0) / 2; | |
612 | } | |
613 | ||
614 | return cur->bc_mp->m_bmap_dmnr[level != 0]; | |
b194c7d8 BN |
615 | } |
616 | ||
b3563c19 | 617 | int |
b194c7d8 BN |
618 | xfs_bmbt_get_maxrecs( |
619 | struct xfs_btree_cur *cur, | |
620 | int level) | |
621 | { | |
b3563c19 BN |
622 | if (level == cur->bc_nlevels - 1) { |
623 | struct xfs_ifork *ifp; | |
624 | ||
625 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, | |
626 | cur->bc_private.b.whichfork); | |
627 | ||
628 | return xfs_bmbt_maxrecs(cur->bc_mp, | |
629 | ifp->if_broot_bytes, level == 0); | |
630 | } | |
631 | ||
632 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
633 | ||
b194c7d8 BN |
634 | } |
635 | ||
636 | /* | |
637 | * Get the maximum records we could store in the on-disk format. | |
638 | * | |
639 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but | |
640 | * for the root node this checks the available space in the dinode fork | |
641 | * so that we can resize the in-memory buffer to match it. After a | |
642 | * resize to the maximum size this function returns the same value | |
643 | * as xfs_bmbt_get_maxrecs for the root node, too. | |
644 | */ | |
645 | STATIC int | |
646 | xfs_bmbt_get_dmaxrecs( | |
647 | struct xfs_btree_cur *cur, | |
648 | int level) | |
649 | { | |
b3563c19 BN |
650 | if (level != cur->bc_nlevels - 1) |
651 | return cur->bc_mp->m_bmap_dmxr[level != 0]; | |
652 | return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize, | |
653 | level == 0); | |
b194c7d8 BN |
654 | } |
655 | ||
656 | STATIC void | |
657 | xfs_bmbt_init_key_from_rec( | |
658 | union xfs_btree_key *key, | |
659 | union xfs_btree_rec *rec) | |
660 | { | |
661 | key->bmbt.br_startoff = | |
662 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); | |
663 | } | |
664 | ||
665 | STATIC void | |
666 | xfs_bmbt_init_rec_from_key( | |
667 | union xfs_btree_key *key, | |
668 | union xfs_btree_rec *rec) | |
669 | { | |
670 | ASSERT(key->bmbt.br_startoff != 0); | |
671 | ||
672 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), | |
673 | 0, 0, XFS_EXT_NORM); | |
674 | } | |
675 | ||
676 | STATIC void | |
677 | xfs_bmbt_init_rec_from_cur( | |
678 | struct xfs_btree_cur *cur, | |
679 | union xfs_btree_rec *rec) | |
680 | { | |
681 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); | |
682 | } | |
683 | ||
684 | STATIC void | |
685 | xfs_bmbt_init_ptr_from_cur( | |
686 | struct xfs_btree_cur *cur, | |
687 | union xfs_btree_ptr *ptr) | |
688 | { | |
689 | ptr->l = 0; | |
690 | } | |
691 | ||
692 | STATIC __int64_t | |
693 | xfs_bmbt_key_diff( | |
694 | struct xfs_btree_cur *cur, | |
695 | union xfs_btree_key *key) | |
696 | { | |
697 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - | |
698 | cur->bc_rec.b.br_startoff; | |
699 | } | |
700 | ||
701 | #ifdef DEBUG | |
702 | STATIC int | |
703 | xfs_bmbt_keys_inorder( | |
704 | struct xfs_btree_cur *cur, | |
705 | union xfs_btree_key *k1, | |
706 | union xfs_btree_key *k2) | |
707 | { | |
708 | return be64_to_cpu(k1->bmbt.br_startoff) < | |
709 | be64_to_cpu(k2->bmbt.br_startoff); | |
710 | } | |
711 | ||
712 | STATIC int | |
713 | xfs_bmbt_recs_inorder( | |
714 | struct xfs_btree_cur *cur, | |
715 | union xfs_btree_rec *r1, | |
716 | union xfs_btree_rec *r2) | |
717 | { | |
718 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + | |
719 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= | |
720 | xfs_bmbt_disk_get_startoff(&r2->bmbt); | |
721 | } | |
722 | #endif /* DEBUG */ | |
723 | ||
724 | #ifdef XFS_BTREE_TRACE | |
725 | ktrace_t *xfs_bmbt_trace_buf; | |
726 | ||
727 | STATIC void | |
728 | xfs_bmbt_trace_enter( | |
729 | struct xfs_btree_cur *cur, | |
730 | const char *func, | |
731 | char *s, | |
732 | int type, | |
733 | int line, | |
734 | __psunsigned_t a0, | |
735 | __psunsigned_t a1, | |
736 | __psunsigned_t a2, | |
737 | __psunsigned_t a3, | |
738 | __psunsigned_t a4, | |
739 | __psunsigned_t a5, | |
740 | __psunsigned_t a6, | |
741 | __psunsigned_t a7, | |
742 | __psunsigned_t a8, | |
743 | __psunsigned_t a9, | |
744 | __psunsigned_t a10) | |
745 | { | |
746 | struct xfs_inode *ip = cur->bc_private.b.ip; | |
747 | int whichfork = cur->bc_private.b.whichfork; | |
748 | ||
749 | ktrace_enter(xfs_bmbt_trace_buf, | |
750 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), | |
751 | (void *)func, (void *)s, (void *)ip, (void *)cur, | |
752 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, | |
753 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, | |
754 | (void *)a8, (void *)a9, (void *)a10); | |
755 | ktrace_enter(ip->i_btrace, | |
756 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), | |
757 | (void *)func, (void *)s, (void *)ip, (void *)cur, | |
758 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, | |
759 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, | |
760 | (void *)a8, (void *)a9, (void *)a10); | |
761 | } | |
762 | ||
763 | STATIC void | |
764 | xfs_bmbt_trace_cursor( | |
765 | struct xfs_btree_cur *cur, | |
766 | __uint32_t *s0, | |
767 | __uint64_t *l0, | |
768 | __uint64_t *l1) | |
769 | { | |
770 | struct xfs_bmbt_rec_host r; | |
771 | ||
772 | xfs_bmbt_set_all(&r, &cur->bc_rec.b); | |
773 | ||
774 | *s0 = (cur->bc_nlevels << 24) | | |
775 | (cur->bc_private.b.flags << 16) | | |
776 | cur->bc_private.b.allocated; | |
777 | *l0 = r.l0; | |
778 | *l1 = r.l1; | |
779 | } | |
780 | ||
781 | STATIC void | |
782 | xfs_bmbt_trace_key( | |
783 | struct xfs_btree_cur *cur, | |
784 | union xfs_btree_key *key, | |
785 | __uint64_t *l0, | |
786 | __uint64_t *l1) | |
787 | { | |
788 | *l0 = be64_to_cpu(key->bmbt.br_startoff); | |
789 | *l1 = 0; | |
790 | } | |
791 | ||
792 | STATIC void | |
793 | xfs_bmbt_trace_record( | |
794 | struct xfs_btree_cur *cur, | |
795 | union xfs_btree_rec *rec, | |
796 | __uint64_t *l0, | |
797 | __uint64_t *l1, | |
798 | __uint64_t *l2) | |
799 | { | |
800 | struct xfs_bmbt_irec irec; | |
801 | ||
802 | xfs_bmbt_disk_get_all(&rec->bmbt, &irec); | |
803 | *l0 = irec.br_startoff; | |
804 | *l1 = irec.br_startblock; | |
805 | *l2 = irec.br_blockcount; | |
806 | } | |
807 | #endif /* XFS_BTREE_TRACE */ | |
808 | ||
809 | static const struct xfs_btree_ops xfs_bmbt_ops = { | |
810 | .rec_len = sizeof(xfs_bmbt_rec_t), | |
811 | .key_len = sizeof(xfs_bmbt_key_t), | |
812 | ||
813 | .dup_cursor = xfs_bmbt_dup_cursor, | |
814 | .update_cursor = xfs_bmbt_update_cursor, | |
815 | .alloc_block = xfs_bmbt_alloc_block, | |
816 | .free_block = xfs_bmbt_free_block, | |
817 | .get_maxrecs = xfs_bmbt_get_maxrecs, | |
818 | .get_minrecs = xfs_bmbt_get_minrecs, | |
819 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, | |
820 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, | |
821 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, | |
822 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, | |
823 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, | |
824 | .key_diff = xfs_bmbt_key_diff, | |
825 | ||
826 | #ifdef DEBUG | |
827 | .keys_inorder = xfs_bmbt_keys_inorder, | |
828 | .recs_inorder = xfs_bmbt_recs_inorder, | |
829 | #endif | |
830 | ||
831 | #ifdef XFS_BTREE_TRACE | |
832 | .trace_enter = xfs_bmbt_trace_enter, | |
833 | .trace_cursor = xfs_bmbt_trace_cursor, | |
834 | .trace_key = xfs_bmbt_trace_key, | |
835 | .trace_record = xfs_bmbt_trace_record, | |
836 | #endif | |
837 | }; | |
838 | ||
839 | /* | |
840 | * Allocate a new bmap btree cursor. | |
841 | */ | |
842 | struct xfs_btree_cur * /* new bmap btree cursor */ | |
843 | xfs_bmbt_init_cursor( | |
844 | struct xfs_mount *mp, /* file system mount point */ | |
845 | struct xfs_trans *tp, /* transaction pointer */ | |
846 | struct xfs_inode *ip, /* inode owning the btree */ | |
847 | int whichfork) /* data or attr fork */ | |
848 | { | |
849 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
850 | struct xfs_btree_cur *cur; | |
851 | ||
852 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
853 | ||
854 | cur->bc_tp = tp; | |
855 | cur->bc_mp = mp; | |
856 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
857 | cur->bc_btnum = XFS_BTNUM_BMAP; | |
858 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
859 | ||
860 | cur->bc_ops = &xfs_bmbt_ops; | |
861 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; | |
862 | ||
863 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); | |
864 | cur->bc_private.b.ip = ip; | |
865 | cur->bc_private.b.firstblock = NULLFSBLOCK; | |
866 | cur->bc_private.b.flist = NULL; | |
867 | cur->bc_private.b.allocated = 0; | |
868 | cur->bc_private.b.flags = 0; | |
869 | cur->bc_private.b.whichfork = whichfork; | |
870 | ||
871 | return cur; | |
872 | } | |
b3563c19 BN |
873 | |
874 | /* | |
875 | * Calculate number of records in a bmap btree block. | |
876 | */ | |
877 | int | |
878 | xfs_bmbt_maxrecs( | |
879 | struct xfs_mount *mp, | |
880 | int blocklen, | |
881 | int leaf) | |
882 | { | |
883 | blocklen -= XFS_BMBT_BLOCK_LEN(mp); | |
884 | ||
885 | if (leaf) | |
886 | return blocklen / sizeof(xfs_bmbt_rec_t); | |
887 | return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)); | |
888 | } | |
889 | ||
890 | /* | |
891 | * Calculate number of records in a bmap btree inode root. | |
892 | */ | |
893 | int | |
894 | xfs_bmdr_maxrecs( | |
895 | struct xfs_mount *mp, | |
896 | int blocklen, | |
897 | int leaf) | |
898 | { | |
899 | blocklen -= sizeof(xfs_bmdr_block_t); | |
900 | ||
901 | if (leaf) | |
902 | return blocklen / sizeof(xfs_bmdr_rec_t); | |
903 | return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t)); | |
904 | } |