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[CPUFREQ] ondemand governor automatic downscaling
[linux-2.6/mini2440.git] / fs / xfs / xfs_bmap_btree.c
blob163305a79fcc583cac98d43ce8c21ba1bc0a3fd9
1 /*
2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32
33 #include "xfs.h"
34
35 #include "xfs_macros.h"
36 #include "xfs_types.h"
37 #include "xfs_inum.h"
38 #include "xfs_log.h"
39 #include "xfs_trans.h"
40 #include "xfs_sb.h"
41 #include "xfs_ag.h"
42 #include "xfs_dir.h"
43 #include "xfs_dir2.h"
44 #include "xfs_dmapi.h"
45 #include "xfs_mount.h"
46 #include "xfs_alloc_btree.h"
47 #include "xfs_bmap_btree.h"
48 #include "xfs_ialloc_btree.h"
49 #include "xfs_btree.h"
50 #include "xfs_ialloc.h"
51 #include "xfs_itable.h"
52 #include "xfs_attr_sf.h"
53 #include "xfs_dir_sf.h"
54 #include "xfs_dir2_sf.h"
55 #include "xfs_dinode.h"
56 #include "xfs_inode_item.h"
57 #include "xfs_inode.h"
58 #include "xfs_alloc.h"
59 #include "xfs_bit.h"
60 #include "xfs_bmap.h"
61 #include "xfs_error.h"
62 #include "xfs_quota.h"
63
64 #if defined(XFS_BMBT_TRACE)
65 ktrace_t *xfs_bmbt_trace_buf;
66 #endif
67
68 /*
69 * Prototypes for internal btree functions.
70 */
71
72
73 STATIC int xfs_bmbt_killroot(xfs_btree_cur_t *);
74 STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
75 STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
76 STATIC int xfs_bmbt_lshift(xfs_btree_cur_t *, int, int *);
77 STATIC int xfs_bmbt_rshift(xfs_btree_cur_t *, int, int *);
78 STATIC int xfs_bmbt_split(xfs_btree_cur_t *, int, xfs_fsblock_t *,
79 xfs_bmbt_key_t *, xfs_btree_cur_t **, int *);
80 STATIC int xfs_bmbt_updkey(xfs_btree_cur_t *, xfs_bmbt_key_t *, int);
81
82
83 #if defined(XFS_BMBT_TRACE)
84
85 static char ARGS[] = "args";
86 static char ENTRY[] = "entry";
87 static char ERROR[] = "error";
88 #undef EXIT
89 static char EXIT[] = "exit";
90
91 /*
92 * Add a trace buffer entry for the arguments given to the routine,
93 * generic form.
94 */
95 STATIC void
96 xfs_bmbt_trace_enter(
97 char *func,
98 xfs_btree_cur_t *cur,
99 char *s,
100 int type,
101 int line,
102 __psunsigned_t a0,
103 __psunsigned_t a1,
104 __psunsigned_t a2,
105 __psunsigned_t a3,
106 __psunsigned_t a4,
107 __psunsigned_t a5,
108 __psunsigned_t a6,
109 __psunsigned_t a7,
110 __psunsigned_t a8,
111 __psunsigned_t a9,
112 __psunsigned_t a10)
113 {
114 xfs_inode_t *ip;
115 int whichfork;
116
117 ip = cur->bc_private.b.ip;
118 whichfork = cur->bc_private.b.whichfork;
119 ktrace_enter(xfs_bmbt_trace_buf,
120 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
121 (void *)func, (void *)s, (void *)ip, (void *)cur,
122 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
123 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
124 (void *)a8, (void *)a9, (void *)a10);
125 ASSERT(ip->i_btrace);
126 ktrace_enter(ip->i_btrace,
127 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
128 (void *)func, (void *)s, (void *)ip, (void *)cur,
129 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
130 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
131 (void *)a8, (void *)a9, (void *)a10);
132 }
133 /*
134 * Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
135 */
136 STATIC void
137 xfs_bmbt_trace_argbi(
138 char *func,
139 xfs_btree_cur_t *cur,
140 xfs_buf_t *b,
141 int i,
142 int line)
143 {
144 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBI, line,
145 (__psunsigned_t)b, i, 0, 0,
146 0, 0, 0, 0,
147 0, 0, 0);
148 }
149
150 /*
151 * Add a trace buffer entry for arguments, for a buffer & 2 integer args.
152 */
153 STATIC void
154 xfs_bmbt_trace_argbii(
155 char *func,
156 xfs_btree_cur_t *cur,
157 xfs_buf_t *b,
158 int i0,
159 int i1,
160 int line)
161 {
162 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBII, line,
163 (__psunsigned_t)b, i0, i1, 0,
164 0, 0, 0, 0,
165 0, 0, 0);
166 }
167
168 /*
169 * Add a trace buffer entry for arguments, for 3 block-length args
170 * and an integer arg.
171 */
172 STATIC void
173 xfs_bmbt_trace_argfffi(
174 char *func,
175 xfs_btree_cur_t *cur,
176 xfs_dfiloff_t o,
177 xfs_dfsbno_t b,
178 xfs_dfilblks_t i,
179 int j,
180 int line)
181 {
182 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGFFFI, line,
183 o >> 32, (int)o, b >> 32, (int)b,
184 i >> 32, (int)i, (int)j, 0,
185 0, 0, 0);
186 }
187
188 /*
189 * Add a trace buffer entry for arguments, for one integer arg.
190 */
191 STATIC void
192 xfs_bmbt_trace_argi(
193 char *func,
194 xfs_btree_cur_t *cur,
195 int i,
196 int line)
197 {
198 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGI, line,
199 i, 0, 0, 0,
200 0, 0, 0, 0,
201 0, 0, 0);
202 }
203
204 /*
205 * Add a trace buffer entry for arguments, for int, fsblock, key.
206 */
207 STATIC void
208 xfs_bmbt_trace_argifk(
209 char *func,
210 xfs_btree_cur_t *cur,
211 int i,
212 xfs_fsblock_t f,
213 xfs_bmbt_key_t *k,
214 int line)
215 {
216 xfs_dfsbno_t d;
217 xfs_dfiloff_t o;
218
219 d = (xfs_dfsbno_t)f;
220 o = INT_GET(k->br_startoff, ARCH_CONVERT);
221 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
222 i, d >> 32, (int)d, o >> 32,
223 (int)o, 0, 0, 0,
224 0, 0, 0);
225 }
226
227 /*
228 * Add a trace buffer entry for arguments, for int, fsblock, rec.
229 */
230 STATIC void
231 xfs_bmbt_trace_argifr(
232 char *func,
233 xfs_btree_cur_t *cur,
234 int i,
235 xfs_fsblock_t f,
236 xfs_bmbt_rec_t *r,
237 int line)
238 {
239 xfs_dfsbno_t b;
240 xfs_dfilblks_t c;
241 xfs_dfsbno_t d;
242 xfs_dfiloff_t o;
243 xfs_bmbt_irec_t s;
244
245 d = (xfs_dfsbno_t)f;
246 xfs_bmbt_disk_get_all(r, &s);
247 o = (xfs_dfiloff_t)s.br_startoff;
248 b = (xfs_dfsbno_t)s.br_startblock;
249 c = s.br_blockcount;
250 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFR, line,
251 i, d >> 32, (int)d, o >> 32,
252 (int)o, b >> 32, (int)b, c >> 32,
253 (int)c, 0, 0);
254 }
255
256 /*
257 * Add a trace buffer entry for arguments, for int, key.
258 */
259 STATIC void
260 xfs_bmbt_trace_argik(
261 char *func,
262 xfs_btree_cur_t *cur,
263 int i,
264 xfs_bmbt_key_t *k,
265 int line)
266 {
267 xfs_dfiloff_t o;
268
269 o = INT_GET(k->br_startoff, ARCH_CONVERT);
270 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
271 i, o >> 32, (int)o, 0,
272 0, 0, 0, 0,
273 0, 0, 0);
274 }
275
276 /*
277 * Add a trace buffer entry for the cursor/operation.
278 */
279 STATIC void
280 xfs_bmbt_trace_cursor(
281 char *func,
282 xfs_btree_cur_t *cur,
283 char *s,
284 int line)
285 {
286 xfs_bmbt_rec_t r;
287
288 xfs_bmbt_set_all(&r, &cur->bc_rec.b);
289 xfs_bmbt_trace_enter(func, cur, s, XFS_BMBT_KTRACE_CUR, line,
290 (cur->bc_nlevels << 24) | (cur->bc_private.b.flags << 16) |
291 cur->bc_private.b.allocated,
292 INT_GET(r.l0, ARCH_CONVERT) >> 32, (int)INT_GET(r.l0, ARCH_CONVERT), INT_GET(r.l1, ARCH_CONVERT) >> 32, (int)INT_GET(r.l1, ARCH_CONVERT),
293 (unsigned long)cur->bc_bufs[0], (unsigned long)cur->bc_bufs[1],
294 (unsigned long)cur->bc_bufs[2], (unsigned long)cur->bc_bufs[3],
295 (cur->bc_ptrs[0] << 16) | cur->bc_ptrs[1],
296 (cur->bc_ptrs[2] << 16) | cur->bc_ptrs[3]);
297 }
298
299 #define XFS_BMBT_TRACE_ARGBI(c,b,i) \
300 xfs_bmbt_trace_argbi(fname, c, b, i, __LINE__)
301 #define XFS_BMBT_TRACE_ARGBII(c,b,i,j) \
302 xfs_bmbt_trace_argbii(fname, c, b, i, j, __LINE__)
303 #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j) \
304 xfs_bmbt_trace_argfffi(fname, c, o, b, i, j, __LINE__)
305 #define XFS_BMBT_TRACE_ARGI(c,i) \
306 xfs_bmbt_trace_argi(fname, c, i, __LINE__)
307 #define XFS_BMBT_TRACE_ARGIFK(c,i,f,k) \
308 xfs_bmbt_trace_argifk(fname, c, i, f, k, __LINE__)
309 #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r) \
310 xfs_bmbt_trace_argifr(fname, c, i, f, r, __LINE__)
311 #define XFS_BMBT_TRACE_ARGIK(c,i,k) \
312 xfs_bmbt_trace_argik(fname, c, i, k, __LINE__)
313 #define XFS_BMBT_TRACE_CURSOR(c,s) \
314 xfs_bmbt_trace_cursor(fname, c, s, __LINE__)
315 #else
316 #define XFS_BMBT_TRACE_ARGBI(c,b,i)
317 #define XFS_BMBT_TRACE_ARGBII(c,b,i,j)
318 #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)
319 #define XFS_BMBT_TRACE_ARGI(c,i)
320 #define XFS_BMBT_TRACE_ARGIFK(c,i,f,k)
321 #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r)
322 #define XFS_BMBT_TRACE_ARGIK(c,i,k)
323 #define XFS_BMBT_TRACE_CURSOR(c,s)
324 #endif /* XFS_BMBT_TRACE */
325
326
327 /*
328 * Internal functions.
329 */
330
331 /*
332 * Delete record pointed to by cur/level.
333 */
334 STATIC int /* error */
335 xfs_bmbt_delrec(
336 xfs_btree_cur_t *cur,
337 int level,
338 int *stat) /* success/failure */
339 {
340 xfs_bmbt_block_t *block; /* bmap btree block */
341 xfs_fsblock_t bno; /* fs-relative block number */
342 xfs_buf_t *bp; /* buffer for block */
343 int error; /* error return value */
344 #ifdef XFS_BMBT_TRACE
345 static char fname[] = "xfs_bmbt_delrec";
346 #endif
347 int i; /* loop counter */
348 int j; /* temp state */
349 xfs_bmbt_key_t key; /* bmap btree key */
350 xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */
351 xfs_fsblock_t lbno; /* left sibling block number */
352 xfs_buf_t *lbp; /* left buffer pointer */
353 xfs_bmbt_block_t *left; /* left btree block */
354 xfs_bmbt_key_t *lkp; /* left btree key */
355 xfs_bmbt_ptr_t *lpp; /* left address pointer */
356 int lrecs=0; /* left record count */
357 xfs_bmbt_rec_t *lrp; /* left record pointer */
358 xfs_mount_t *mp; /* file system mount point */
359 xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
360 int ptr; /* key/record index */
361 xfs_fsblock_t rbno; /* right sibling block number */
362 xfs_buf_t *rbp; /* right buffer pointer */
363 xfs_bmbt_block_t *right; /* right btree block */
364 xfs_bmbt_key_t *rkp; /* right btree key */
365 xfs_bmbt_rec_t *rp; /* pointer to bmap btree rec */
366 xfs_bmbt_ptr_t *rpp; /* right address pointer */
367 xfs_bmbt_block_t *rrblock; /* right-right btree block */
368 xfs_buf_t *rrbp; /* right-right buffer pointer */
369 int rrecs=0; /* right record count */
370 xfs_bmbt_rec_t *rrp; /* right record pointer */
371 xfs_btree_cur_t *tcur; /* temporary btree cursor */
372 int numrecs; /* temporary numrec count */
373 int numlrecs, numrrecs;
374
375 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
376 XFS_BMBT_TRACE_ARGI(cur, level);
377 ptr = cur->bc_ptrs[level];
378 tcur = (xfs_btree_cur_t *)0;
379 if (ptr == 0) {
380 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
381 *stat = 0;
382 return 0;
383 }
384 block = xfs_bmbt_get_block(cur, level, &bp);
385 numrecs = INT_GET(block->bb_numrecs, ARCH_CONVERT);
386 #ifdef DEBUG
387 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
388 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
389 goto error0;
390 }
391 #endif
392 if (ptr > numrecs) {
393 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
394 *stat = 0;
395 return 0;
396 }
397 XFS_STATS_INC(xs_bmbt_delrec);
398 if (level > 0) {
399 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
400 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
401 #ifdef DEBUG
402 for (i = ptr; i < numrecs; i++) {
403 if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i], ARCH_CONVERT), level))) {
404 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
405 goto error0;
406 }
407 }
408 #endif
409 if (ptr < numrecs) {
410 memmove(&kp[ptr - 1], &kp[ptr],
411 (numrecs - ptr) * sizeof(*kp));
412 memmove(&pp[ptr - 1], &pp[ptr], /* INT_: direct copy */
413 (numrecs - ptr) * sizeof(*pp));
414 xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1);
415 xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1);
416 }
417 } else {
418 rp = XFS_BMAP_REC_IADDR(block, 1, cur);
419 if (ptr < numrecs) {
420 memmove(&rp[ptr - 1], &rp[ptr],
421 (numrecs - ptr) * sizeof(*rp));
422 xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1);
423 }
424 if (ptr == 1) {
425 INT_SET(key.br_startoff, ARCH_CONVERT, xfs_bmbt_disk_get_startoff(rp));
426 kp = &key;
427 }
428 }
429 numrecs--;
430 INT_SET(block->bb_numrecs, ARCH_CONVERT, numrecs);
431 xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
432 /*
433 * We're at the root level.
434 * First, shrink the root block in-memory.
435 * Try to get rid of the next level down.
436 * If we can't then there's nothing left to do.
437 */
438 if (level == cur->bc_nlevels - 1) {
439 xfs_iroot_realloc(cur->bc_private.b.ip, -1,
440 cur->bc_private.b.whichfork);
441 if ((error = xfs_bmbt_killroot(cur))) {
442 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
443 goto error0;
444 }
445 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
446 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
447 goto error0;
448 }
449 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
450 *stat = 1;
451 return 0;
452 }
453 if (ptr == 1 && (error = xfs_bmbt_updkey(cur, kp, level + 1))) {
454 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
455 goto error0;
456 }
457 if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
458 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
459 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
460 goto error0;
461 }
462 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
463 *stat = 1;
464 return 0;
465 }
466 rbno = INT_GET(block->bb_rightsib, ARCH_CONVERT);
467 lbno = INT_GET(block->bb_leftsib, ARCH_CONVERT);
468 /*
469 * One child of root, need to get a chance to copy its contents
470 * into the root and delete it. Can't go up to next level,
471 * there's nothing to delete there.
472 */
473 if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK &&
474 level == cur->bc_nlevels - 2) {
475 if ((error = xfs_bmbt_killroot(cur))) {
476 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
477 goto error0;
478 }
479 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
480 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
481 goto error0;
482 }
483 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
484 *stat = 1;
485 return 0;
486 }
487 ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK);
488 if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
489 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
490 goto error0;
491 }
492 bno = NULLFSBLOCK;
493 if (rbno != NULLFSBLOCK) {
494 i = xfs_btree_lastrec(tcur, level);
495 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
496 if ((error = xfs_bmbt_increment(tcur, level, &i))) {
497 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
498 goto error0;
499 }
500 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
501 i = xfs_btree_lastrec(tcur, level);
502 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
503 rbp = tcur->bc_bufs[level];
504 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
505 #ifdef DEBUG
506 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
507 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
508 goto error0;
509 }
510 #endif
511 bno = INT_GET(right->bb_leftsib, ARCH_CONVERT);
512 if (INT_GET(right->bb_numrecs, ARCH_CONVERT) - 1 >=
513 XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
514 if ((error = xfs_bmbt_lshift(tcur, level, &i))) {
515 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
516 goto error0;
517 }
518 if (i) {
519 ASSERT(INT_GET(block->bb_numrecs, ARCH_CONVERT) >=
520 XFS_BMAP_BLOCK_IMINRECS(level, tcur));
521 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
522 tcur = NULL;
523 if (level > 0) {
524 if ((error = xfs_bmbt_decrement(cur,
525 level, &i))) {
526 XFS_BMBT_TRACE_CURSOR(cur,
527 ERROR);
528 goto error0;
529 }
530 }
531 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
532 *stat = 1;
533 return 0;
534 }
535 }
536 rrecs = INT_GET(right->bb_numrecs, ARCH_CONVERT);
537 if (lbno != NULLFSBLOCK) {
538 i = xfs_btree_firstrec(tcur, level);
539 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
540 if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
541 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
542 goto error0;
543 }
544 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
545 }
546 }
547 if (lbno != NULLFSBLOCK) {
548 i = xfs_btree_firstrec(tcur, level);
549 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
550 /*
551 * decrement to last in block
552 */
553 if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
554 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
555 goto error0;
556 }
557 i = xfs_btree_firstrec(tcur, level);
558 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
559 lbp = tcur->bc_bufs[level];
560 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
561 #ifdef DEBUG
562 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
563 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
564 goto error0;
565 }
566 #endif
567 bno = INT_GET(left->bb_rightsib, ARCH_CONVERT);
568 if (INT_GET(left->bb_numrecs, ARCH_CONVERT) - 1 >=
569 XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
570 if ((error = xfs_bmbt_rshift(tcur, level, &i))) {
571 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
572 goto error0;
573 }
574 if (i) {
575 ASSERT(INT_GET(block->bb_numrecs, ARCH_CONVERT) >=
576 XFS_BMAP_BLOCK_IMINRECS(level, tcur));
577 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
578 tcur = NULL;
579 if (level == 0)
580 cur->bc_ptrs[0]++;
581 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
582 *stat = 1;
583 return 0;
584 }
585 }
586 lrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT);
587 }
588 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
589 tcur = NULL;
590 mp = cur->bc_mp;
591 ASSERT(bno != NULLFSBLOCK);
592 if (lbno != NULLFSBLOCK &&
593 lrecs + INT_GET(block->bb_numrecs, ARCH_CONVERT) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
594 rbno = bno;
595 right = block;
596 rbp = bp;
597 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp,
598 XFS_BMAP_BTREE_REF))) {
599 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
600 goto error0;
601 }
602 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
603 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
604 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
605 goto error0;
606 }
607 } else if (rbno != NULLFSBLOCK &&
608 rrecs + INT_GET(block->bb_numrecs, ARCH_CONVERT) <=
609 XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
610 lbno = bno;
611 left = block;
612 lbp = bp;
613 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp,
614 XFS_BMAP_BTREE_REF))) {
615 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
616 goto error0;
617 }
618 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
619 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
620 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
621 goto error0;
622 }
623 lrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT);
624 } else {
625 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
626 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
627 goto error0;
628 }
629 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
630 *stat = 1;
631 return 0;
632 }
633 numlrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT);
634 numrrecs = INT_GET(right->bb_numrecs, ARCH_CONVERT);
635 if (level > 0) {
636 lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur);
637 lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur);
638 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
639 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
640 #ifdef DEBUG
641 for (i = 0; i < numrrecs; i++) {
642 if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i], ARCH_CONVERT), level))) {
643 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
644 goto error0;
645 }
646 }
647 #endif
648 memcpy(lkp, rkp, numrrecs * sizeof(*lkp));
649 memcpy(lpp, rpp, numrrecs * sizeof(*lpp));
650 xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
651 xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
652 } else {
653 lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur);
654 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
655 memcpy(lrp, rrp, numrrecs * sizeof(*lrp));
656 xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
657 }
658 INT_MOD(left->bb_numrecs, ARCH_CONVERT, numrrecs);
659 left->bb_rightsib = right->bb_rightsib; /* INT_: direct copy */
660 xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS);
661 if (INT_GET(left->bb_rightsib, ARCH_CONVERT) != NULLDFSBNO) {
662 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp,
663 INT_GET(left->bb_rightsib, ARCH_CONVERT),
664 0, &rrbp, XFS_BMAP_BTREE_REF))) {
665 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
666 goto error0;
667 }
668 rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
669 if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
670 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
671 goto error0;
672 }
673 INT_SET(rrblock->bb_leftsib, ARCH_CONVERT, lbno);
674 xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
675 }
676 xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1,
677 cur->bc_private.b.flist, mp);
678 cur->bc_private.b.ip->i_d.di_nblocks--;
679 xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
680 XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip,
681 XFS_TRANS_DQ_BCOUNT, -1L);
682 xfs_trans_binval(cur->bc_tp, rbp);
683 if (bp != lbp) {
684 cur->bc_bufs[level] = lbp;
685 cur->bc_ptrs[level] += lrecs;
686 cur->bc_ra[level] = 0;
687 } else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) {
688 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
689 goto error0;
690 }
691 if (level > 0)
692 cur->bc_ptrs[level]--;
693 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
694 *stat = 2;
695 return 0;
696
697 error0:
698 if (tcur)
699 xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
700 return error;
701 }
702
703 #ifdef DEBUG
704 /*
705 * Get the data from the pointed-to record.
706 */
707 int
708 xfs_bmbt_get_rec(
709 xfs_btree_cur_t *cur,
710 xfs_fileoff_t *off,
711 xfs_fsblock_t *bno,
712 xfs_filblks_t *len,
713 xfs_exntst_t *state,
714 int *stat)
715 {
716 xfs_bmbt_block_t *block;
717 xfs_buf_t *bp;
718 #ifdef DEBUG
719 int error;
720 #endif
721 int ptr;
722 xfs_bmbt_rec_t *rp;
723
724 block = xfs_bmbt_get_block(cur, 0, &bp);
725 ptr = cur->bc_ptrs[0];
726 #ifdef DEBUG
727 if ((error = xfs_btree_check_lblock(cur, block, 0, bp)))
728 return error;
729 #endif
730 if (ptr > INT_GET(block->bb_numrecs, ARCH_CONVERT) || ptr <= 0) {
731 *stat = 0;
732 return 0;
733 }
734 rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
735 *off = xfs_bmbt_disk_get_startoff(rp);
736 *bno = xfs_bmbt_disk_get_startblock(rp);
737 *len = xfs_bmbt_disk_get_blockcount(rp);
738 *state = xfs_bmbt_disk_get_state(rp);
739 *stat = 1;
740 return 0;
741 }
742 #endif
743
744 /*
745 * Insert one record/level. Return information to the caller
746 * allowing the next level up to proceed if necessary.
747 */
748 STATIC int /* error */
749 xfs_bmbt_insrec(
750 xfs_btree_cur_t *cur,
751 int level,
752 xfs_fsblock_t *bnop,
753 xfs_bmbt_rec_t *recp,
754 xfs_btree_cur_t **curp,
755 int *stat) /* no-go/done/continue */
756 {
757 xfs_bmbt_block_t *block; /* bmap btree block */
758 xfs_buf_t *bp; /* buffer for block */
759 int error; /* error return value */
760 #ifdef XFS_BMBT_TRACE
761 static char fname[] = "xfs_bmbt_insrec";
762 #endif
763 int i; /* loop index */
764 xfs_bmbt_key_t key; /* bmap btree key */
765 xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */
766 int logflags; /* inode logging flags */
767 xfs_fsblock_t nbno; /* new block number */
768 struct xfs_btree_cur *ncur; /* new btree cursor */
769 xfs_bmbt_key_t nkey; /* new btree key value */
770 xfs_bmbt_rec_t nrec; /* new record count */
771 int optr; /* old key/record index */
772 xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
773 int ptr; /* key/record index */
774 xfs_bmbt_rec_t *rp=NULL; /* pointer to bmap btree rec */
775 int numrecs;
776
777 ASSERT(level < cur->bc_nlevels);
778 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
779 XFS_BMBT_TRACE_ARGIFR(cur, level, *bnop, recp);
780 ncur = (xfs_btree_cur_t *)0;
781 INT_SET(key.br_startoff, ARCH_CONVERT,
782 xfs_bmbt_disk_get_startoff(recp));
783 optr = ptr = cur->bc_ptrs[level];
784 if (ptr == 0) {
785 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
786 *stat = 0;
787 return 0;
788 }
789 XFS_STATS_INC(xs_bmbt_insrec);
790 block = xfs_bmbt_get_block(cur, level, &bp);
791 numrecs = INT_GET(block->bb_numrecs, ARCH_CONVERT);
792 #ifdef DEBUG
793 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
794 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
795 return error;
796 }
797 if (ptr <= numrecs) {
798 if (level == 0) {
799 rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
800 xfs_btree_check_rec(XFS_BTNUM_BMAP, recp, rp);
801 } else {
802 kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
803 xfs_btree_check_key(XFS_BTNUM_BMAP, &key, kp);
804 }
805 }
806 #endif
807 nbno = NULLFSBLOCK;
808 if (numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
809 if (numrecs < XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
810 /*
811 * A root block, that can be made bigger.
812 */
813 xfs_iroot_realloc(cur->bc_private.b.ip, 1,
814 cur->bc_private.b.whichfork);
815 block = xfs_bmbt_get_block(cur, level, &bp);
816 } else if (level == cur->bc_nlevels - 1) {
817 if ((error = xfs_bmbt_newroot(cur, &logflags, stat)) ||
818 *stat == 0) {
819 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
820 return error;
821 }
822 xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
823 logflags);
824 block = xfs_bmbt_get_block(cur, level, &bp);
825 } else {
826 if ((error = xfs_bmbt_rshift(cur, level, &i))) {
827 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
828 return error;
829 }
830 if (i) {
831 /* nothing */
832 } else {
833 if ((error = xfs_bmbt_lshift(cur, level, &i))) {
834 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
835 return error;
836 }
837 if (i) {
838 optr = ptr = cur->bc_ptrs[level];
839 } else {
840 if ((error = xfs_bmbt_split(cur, level,
841 &nbno, &nkey, &ncur,
842 &i))) {
843 XFS_BMBT_TRACE_CURSOR(cur,
844 ERROR);
845 return error;
846 }
847 if (i) {
848 block = xfs_bmbt_get_block(
849 cur, level, &bp);
850 #ifdef DEBUG
851 if ((error =
852 xfs_btree_check_lblock(cur,
853 block, level, bp))) {
854 XFS_BMBT_TRACE_CURSOR(
855 cur, ERROR);
856 return error;
857 }
858 #endif
859 ptr = cur->bc_ptrs[level];
860 xfs_bmbt_disk_set_allf(&nrec,
861 nkey.br_startoff, 0, 0,
862 XFS_EXT_NORM);
863 } else {
864 XFS_BMBT_TRACE_CURSOR(cur,
865 EXIT);
866 *stat = 0;
867 return 0;
868 }
869 }
870 }
871 }
872 }
873 numrecs = INT_GET(block->bb_numrecs, ARCH_CONVERT);
874 if (level > 0) {
875 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
876 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
877 #ifdef DEBUG
878 for (i = numrecs; i >= ptr; i--) {
879 if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i - 1], ARCH_CONVERT),
880 level))) {
881 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
882 return error;
883 }
884 }
885 #endif
886 memmove(&kp[ptr], &kp[ptr - 1],
887 (numrecs - ptr + 1) * sizeof(*kp));
888 memmove(&pp[ptr], &pp[ptr - 1], /* INT_: direct copy */
889 (numrecs - ptr + 1) * sizeof(*pp));
890 #ifdef DEBUG
891 if ((error = xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)*bnop,
892 level))) {
893 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
894 return error;
895 }
896 #endif
897 kp[ptr - 1] = key;
898 INT_SET(pp[ptr - 1], ARCH_CONVERT, *bnop);
899 numrecs++;
900 INT_SET(block->bb_numrecs, ARCH_CONVERT, numrecs);
901 xfs_bmbt_log_keys(cur, bp, ptr, numrecs);
902 xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs);
903 } else {
904 rp = XFS_BMAP_REC_IADDR(block, 1, cur);
905 memmove(&rp[ptr], &rp[ptr - 1],
906 (numrecs - ptr + 1) * sizeof(*rp));
907 rp[ptr - 1] = *recp;
908 numrecs++;
909 INT_SET(block->bb_numrecs, ARCH_CONVERT, numrecs);
910 xfs_bmbt_log_recs(cur, bp, ptr, numrecs);
911 }
912 xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
913 #ifdef DEBUG
914 if (ptr < numrecs) {
915 if (level == 0)
916 xfs_btree_check_rec(XFS_BTNUM_BMAP, rp + ptr - 1,
917 rp + ptr);
918 else
919 xfs_btree_check_key(XFS_BTNUM_BMAP, kp + ptr - 1,
920 kp + ptr);
921 }
922 #endif
923 if (optr == 1 && (error = xfs_bmbt_updkey(cur, &key, level + 1))) {
924 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
925 return error;
926 }
927 *bnop = nbno;
928 if (nbno != NULLFSBLOCK) {
929 *recp = nrec;
930 *curp = ncur;
931 }
932 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
933 *stat = 1;
934 return 0;
935 }
936
937 STATIC int
938 xfs_bmbt_killroot(
939 xfs_btree_cur_t *cur)
940 {
941 xfs_bmbt_block_t *block;
942 xfs_bmbt_block_t *cblock;
943 xfs_buf_t *cbp;
944 xfs_bmbt_key_t *ckp;
945 xfs_bmbt_ptr_t *cpp;
946 #ifdef DEBUG
947 int error;
948 #endif
949 #ifdef XFS_BMBT_TRACE
950 static char fname[] = "xfs_bmbt_killroot";
951 #endif
952 int i;
953 xfs_bmbt_key_t *kp;
954 xfs_inode_t *ip;
955 xfs_ifork_t *ifp;
956 int level;
957 xfs_bmbt_ptr_t *pp;
958
959 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
960 level = cur->bc_nlevels - 1;
961 ASSERT(level >= 1);
962 /*
963 * Don't deal with the root block needs to be a leaf case.
964 * We're just going to turn the thing back into extents anyway.
965 */
966 if (level == 1) {
967 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
968 return 0;
969 }
970 block = xfs_bmbt_get_block(cur, level, &cbp);
971 /*
972 * Give up if the root has multiple children.
973 */
974 if (INT_GET(block->bb_numrecs, ARCH_CONVERT) != 1) {
975 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
976 return 0;
977 }
978 /*
979 * Only do this if the next level will fit.
980 * Then the data must be copied up to the inode,
981 * instead of freeing the root you free the next level.
982 */
983 cbp = cur->bc_bufs[level - 1];
984 cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
985 if (INT_GET(cblock->bb_numrecs, ARCH_CONVERT) > XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
986 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
987 return 0;
988 }
989 ASSERT(INT_GET(cblock->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO);
990 ASSERT(INT_GET(cblock->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO);
991 ip = cur->bc_private.b.ip;
992 ifp = XFS_IFORK_PTR(ip, cur->bc_private.b.whichfork);
993 ASSERT(XFS_BMAP_BLOCK_IMAXRECS(level, cur) ==
994 XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes));
995 i = (int)(INT_GET(cblock->bb_numrecs, ARCH_CONVERT) - XFS_BMAP_BLOCK_IMAXRECS(level, cur));
996 if (i) {
997 xfs_iroot_realloc(ip, i, cur->bc_private.b.whichfork);
998 block = ifp->if_broot;
999 }
1000 INT_MOD(block->bb_numrecs, ARCH_CONVERT, i);
1001 ASSERT(INT_GET(block->bb_numrecs, ARCH_CONVERT) == INT_GET(cblock->bb_numrecs, ARCH_CONVERT));
1002 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
1003 ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
1004 memcpy(kp, ckp, INT_GET(block->bb_numrecs, ARCH_CONVERT) * sizeof(*kp));
1005 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
1006 cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
1007 #ifdef DEBUG
1008 for (i = 0; i < INT_GET(cblock->bb_numrecs, ARCH_CONVERT); i++) {
1009 if ((error = xfs_btree_check_lptr(cur, INT_GET(cpp[i], ARCH_CONVERT), level - 1))) {
1010 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1011 return error;
1012 }
1013 }
1014 #endif
1015 memcpy(pp, cpp, INT_GET(block->bb_numrecs, ARCH_CONVERT) * sizeof(*pp));
1016 xfs_bmap_add_free(XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(cbp)), 1,
1017 cur->bc_private.b.flist, cur->bc_mp);
1018 ip->i_d.di_nblocks--;
1019 XFS_TRANS_MOD_DQUOT_BYINO(cur->bc_mp, cur->bc_tp, ip,
1020 XFS_TRANS_DQ_BCOUNT, -1L);
1021 xfs_trans_binval(cur->bc_tp, cbp);
1022 cur->bc_bufs[level - 1] = NULL;
1023 INT_MOD(block->bb_level, ARCH_CONVERT, -1);
1024 xfs_trans_log_inode(cur->bc_tp, ip,
1025 XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1026 cur->bc_nlevels--;
1027 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1028 return 0;
1029 }
1030
1031 /*
1032 * Log key values from the btree block.
1033 */
1034 STATIC void
1035 xfs_bmbt_log_keys(
1036 xfs_btree_cur_t *cur,
1037 xfs_buf_t *bp,
1038 int kfirst,
1039 int klast)
1040 {
1041 #ifdef XFS_BMBT_TRACE
1042 static char fname[] = "xfs_bmbt_log_keys";
1043 #endif
1044 xfs_trans_t *tp;
1045
1046 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1047 XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast);
1048 tp = cur->bc_tp;
1049 if (bp) {
1050 xfs_bmbt_block_t *block;
1051 int first;
1052 xfs_bmbt_key_t *kp;
1053 int last;
1054
1055 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1056 kp = XFS_BMAP_KEY_DADDR(block, 1, cur);
1057 first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block);
1058 last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block);
1059 xfs_trans_log_buf(tp, bp, first, last);
1060 } else {
1061 xfs_inode_t *ip;
1062
1063 ip = cur->bc_private.b.ip;
1064 xfs_trans_log_inode(tp, ip,
1065 XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1066 }
1067 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1068 }
1069
1070 /*
1071 * Log pointer values from the btree block.
1072 */
1073 STATIC void
1074 xfs_bmbt_log_ptrs(
1075 xfs_btree_cur_t *cur,
1076 xfs_buf_t *bp,
1077 int pfirst,
1078 int plast)
1079 {
1080 #ifdef XFS_BMBT_TRACE
1081 static char fname[] = "xfs_bmbt_log_ptrs";
1082 #endif
1083 xfs_trans_t *tp;
1084
1085 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1086 XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast);
1087 tp = cur->bc_tp;
1088 if (bp) {
1089 xfs_bmbt_block_t *block;
1090 int first;
1091 int last;
1092 xfs_bmbt_ptr_t *pp;
1093
1094 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1095 pp = XFS_BMAP_PTR_DADDR(block, 1, cur);
1096 first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block);
1097 last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block);
1098 xfs_trans_log_buf(tp, bp, first, last);
1099 } else {
1100 xfs_inode_t *ip;
1101
1102 ip = cur->bc_private.b.ip;
1103 xfs_trans_log_inode(tp, ip,
1104 XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1105 }
1106 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1107 }
1108
1109 /*
1110 * Lookup the record. The cursor is made to point to it, based on dir.
1111 */
1112 STATIC int /* error */
1113 xfs_bmbt_lookup(
1114 xfs_btree_cur_t *cur,
1115 xfs_lookup_t dir,
1116 int *stat) /* success/failure */
1117 {
1118 xfs_bmbt_block_t *block=NULL;
1119 xfs_buf_t *bp;
1120 xfs_daddr_t d;
1121 xfs_sfiloff_t diff;
1122 int error; /* error return value */
1123 #ifdef XFS_BMBT_TRACE
1124 static char fname[] = "xfs_bmbt_lookup";
1125 #endif
1126 xfs_fsblock_t fsbno=0;
1127 int high;
1128 int i;
1129 int keyno=0;
1130 xfs_bmbt_key_t *kkbase=NULL;
1131 xfs_bmbt_key_t *kkp;
1132 xfs_bmbt_rec_t *krbase=NULL;
1133 xfs_bmbt_rec_t *krp;
1134 int level;
1135 int low;
1136 xfs_mount_t *mp;
1137 xfs_bmbt_ptr_t *pp;
1138 xfs_bmbt_irec_t *rp;
1139 xfs_fileoff_t startoff;
1140 xfs_trans_t *tp;
1141
1142 XFS_STATS_INC(xs_bmbt_lookup);
1143 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1144 XFS_BMBT_TRACE_ARGI(cur, (int)dir);
1145 tp = cur->bc_tp;
1146 mp = cur->bc_mp;
1147 rp = &cur->bc_rec.b;
1148 for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
1149 if (level < cur->bc_nlevels - 1) {
1150 d = XFS_FSB_TO_DADDR(mp, fsbno);
1151 bp = cur->bc_bufs[level];
1152 if (bp && XFS_BUF_ADDR(bp) != d)
1153 bp = (xfs_buf_t *)0;
1154 if (!bp) {
1155 if ((error = xfs_btree_read_bufl(mp, tp, fsbno,
1156 0, &bp, XFS_BMAP_BTREE_REF))) {
1157 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1158 return error;
1159 }
1160 xfs_btree_setbuf(cur, level, bp);
1161 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1162 if ((error = xfs_btree_check_lblock(cur, block,
1163 level, bp))) {
1164 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1165 return error;
1166 }
1167 } else
1168 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1169 } else
1170 block = xfs_bmbt_get_block(cur, level, &bp);
1171 if (diff == 0)
1172 keyno = 1;
1173 else {
1174 if (level > 0)
1175 kkbase = XFS_BMAP_KEY_IADDR(block, 1, cur);
1176 else
1177 krbase = XFS_BMAP_REC_IADDR(block, 1, cur);
1178 low = 1;
1179 if (!(high = INT_GET(block->bb_numrecs, ARCH_CONVERT))) {
1180 ASSERT(level == 0);
1181 cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
1182 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1183 *stat = 0;
1184 return 0;
1185 }
1186 while (low <= high) {
1187 XFS_STATS_INC(xs_bmbt_compare);
1188 keyno = (low + high) >> 1;
1189 if (level > 0) {
1190 kkp = kkbase + keyno - 1;
1191 startoff = INT_GET(kkp->br_startoff, ARCH_CONVERT);
1192 } else {
1193 krp = krbase + keyno - 1;
1194 startoff = xfs_bmbt_disk_get_startoff(krp);
1195 }
1196 diff = (xfs_sfiloff_t)
1197 (startoff - rp->br_startoff);
1198 if (diff < 0)
1199 low = keyno + 1;
1200 else if (diff > 0)
1201 high = keyno - 1;
1202 else
1203 break;
1204 }
1205 }
1206 if (level > 0) {
1207 if (diff > 0 && --keyno < 1)
1208 keyno = 1;
1209 pp = XFS_BMAP_PTR_IADDR(block, keyno, cur);
1210 #ifdef DEBUG
1211 if ((error = xfs_btree_check_lptr(cur, INT_GET(*pp, ARCH_CONVERT), level))) {
1212 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1213 return error;
1214 }
1215 #endif
1216 fsbno = INT_GET(*pp, ARCH_CONVERT);
1217 cur->bc_ptrs[level] = keyno;
1218 }
1219 }
1220 if (dir != XFS_LOOKUP_LE && diff < 0) {
1221 keyno++;
1222 /*
1223 * If ge search and we went off the end of the block, but it's
1224 * not the last block, we're in the wrong block.
1225 */
1226 if (dir == XFS_LOOKUP_GE && keyno > INT_GET(block->bb_numrecs, ARCH_CONVERT) &&
1227 INT_GET(block->bb_rightsib, ARCH_CONVERT) != NULLDFSBNO) {
1228 cur->bc_ptrs[0] = keyno;
1229 if ((error = xfs_bmbt_increment(cur, 0, &i))) {
1230 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1231 return error;
1232 }
1233 XFS_WANT_CORRUPTED_RETURN(i == 1);
1234 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1235 *stat = 1;
1236 return 0;
1237 }
1238 }
1239 else if (dir == XFS_LOOKUP_LE && diff > 0)
1240 keyno--;
1241 cur->bc_ptrs[0] = keyno;
1242 if (keyno == 0 || keyno > INT_GET(block->bb_numrecs, ARCH_CONVERT)) {
1243 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1244 *stat = 0;
1245 } else {
1246 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1247 *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0));
1248 }
1249 return 0;
1250 }
1251
1252 /*
1253 * Move 1 record left from cur/level if possible.
1254 * Update cur to reflect the new path.
1255 */
1256 STATIC int /* error */
1257 xfs_bmbt_lshift(
1258 xfs_btree_cur_t *cur,
1259 int level,
1260 int *stat) /* success/failure */
1261 {
1262 int error; /* error return value */
1263 #ifdef XFS_BMBT_TRACE
1264 static char fname[] = "xfs_bmbt_lshift";
1265 #endif
1266 #ifdef DEBUG
1267 int i; /* loop counter */
1268 #endif
1269 xfs_bmbt_key_t key; /* bmap btree key */
1270 xfs_buf_t *lbp; /* left buffer pointer */
1271 xfs_bmbt_block_t *left; /* left btree block */
1272 xfs_bmbt_key_t *lkp=NULL; /* left btree key */
1273 xfs_bmbt_ptr_t *lpp; /* left address pointer */
1274 int lrecs; /* left record count */
1275 xfs_bmbt_rec_t *lrp=NULL; /* left record pointer */
1276 xfs_mount_t *mp; /* file system mount point */
1277 xfs_buf_t *rbp; /* right buffer pointer */
1278 xfs_bmbt_block_t *right; /* right btree block */
1279 xfs_bmbt_key_t *rkp=NULL; /* right btree key */
1280 xfs_bmbt_ptr_t *rpp=NULL; /* right address pointer */
1281 xfs_bmbt_rec_t *rrp=NULL; /* right record pointer */
1282 int rrecs; /* right record count */
1283
1284 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1285 XFS_BMBT_TRACE_ARGI(cur, level);
1286 if (level == cur->bc_nlevels - 1) {
1287 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1288 *stat = 0;
1289 return 0;
1290 }
1291 rbp = cur->bc_bufs[level];
1292 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1293 #ifdef DEBUG
1294 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
1295 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1296 return error;
1297 }
1298 #endif
1299 if (INT_GET(right->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO) {
1300 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1301 *stat = 0;
1302 return 0;
1303 }
1304 if (cur->bc_ptrs[level] <= 1) {
1305 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1306 *stat = 0;
1307 return 0;
1308 }
1309 mp = cur->bc_mp;
1310 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, INT_GET(right->bb_leftsib, ARCH_CONVERT), 0,
1311 &lbp, XFS_BMAP_BTREE_REF))) {
1312 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1313 return error;
1314 }
1315 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1316 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
1317 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1318 return error;
1319 }
1320 if (INT_GET(left->bb_numrecs, ARCH_CONVERT) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
1321 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1322 *stat = 0;
1323 return 0;
1324 }
1325 lrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT) + 1;
1326 if (level > 0) {
1327 lkp = XFS_BMAP_KEY_IADDR(left, lrecs, cur);
1328 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1329 *lkp = *rkp;
1330 xfs_bmbt_log_keys(cur, lbp, lrecs, lrecs);
1331 lpp = XFS_BMAP_PTR_IADDR(left, lrecs, cur);
1332 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1333 #ifdef DEBUG
1334 if ((error = xfs_btree_check_lptr(cur, INT_GET(*rpp, ARCH_CONVERT), level))) {
1335 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1336 return error;
1337 }
1338 #endif
1339 *lpp = *rpp; /* INT_: direct copy */
1340 xfs_bmbt_log_ptrs(cur, lbp, lrecs, lrecs);
1341 } else {
1342 lrp = XFS_BMAP_REC_IADDR(left, lrecs, cur);
1343 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1344 *lrp = *rrp;
1345 xfs_bmbt_log_recs(cur, lbp, lrecs, lrecs);
1346 }
1347 INT_SET(left->bb_numrecs, ARCH_CONVERT, lrecs);
1348 xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
1349 #ifdef DEBUG
1350 if (level > 0)
1351 xfs_btree_check_key(XFS_BTNUM_BMAP, lkp - 1, lkp);
1352 else
1353 xfs_btree_check_rec(XFS_BTNUM_BMAP, lrp - 1, lrp);
1354 #endif
1355 rrecs = INT_GET(right->bb_numrecs, ARCH_CONVERT) - 1;
1356 INT_SET(right->bb_numrecs, ARCH_CONVERT, rrecs);
1357 xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
1358 if (level > 0) {
1359 #ifdef DEBUG
1360 for (i = 0; i < rrecs; i++) {
1361 if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i + 1], ARCH_CONVERT),
1362 level))) {
1363 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1364 return error;
1365 }
1366 }
1367 #endif
1368 memmove(rkp, rkp + 1, rrecs * sizeof(*rkp));
1369 memmove(rpp, rpp + 1, rrecs * sizeof(*rpp));
1370 xfs_bmbt_log_keys(cur, rbp, 1, rrecs);
1371 xfs_bmbt_log_ptrs(cur, rbp, 1, rrecs);
1372 } else {
1373 memmove(rrp, rrp + 1, rrecs * sizeof(*rrp));
1374 xfs_bmbt_log_recs(cur, rbp, 1, rrecs);
1375 INT_SET(key.br_startoff, ARCH_CONVERT,
1376 xfs_bmbt_disk_get_startoff(rrp));
1377 rkp = &key;
1378 }
1379 if ((error = xfs_bmbt_updkey(cur, rkp, level + 1))) {
1380 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1381 return error;
1382 }
1383 cur->bc_ptrs[level]--;
1384 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1385 *stat = 1;
1386 return 0;
1387 }
1388
1389 /*
1390 * Move 1 record right from cur/level if possible.
1391 * Update cur to reflect the new path.
1392 */
1393 STATIC int /* error */
1394 xfs_bmbt_rshift(
1395 xfs_btree_cur_t *cur,
1396 int level,
1397 int *stat) /* success/failure */
1398 {
1399 int error; /* error return value */
1400 #ifdef XFS_BMBT_TRACE
1401 static char fname[] = "xfs_bmbt_rshift";
1402 #endif
1403 int i; /* loop counter */
1404 xfs_bmbt_key_t key; /* bmap btree key */
1405 xfs_buf_t *lbp; /* left buffer pointer */
1406 xfs_bmbt_block_t *left; /* left btree block */
1407 xfs_bmbt_key_t *lkp; /* left btree key */
1408 xfs_bmbt_ptr_t *lpp; /* left address pointer */
1409 xfs_bmbt_rec_t *lrp; /* left record pointer */
1410 xfs_mount_t *mp; /* file system mount point */
1411 xfs_buf_t *rbp; /* right buffer pointer */
1412 xfs_bmbt_block_t *right; /* right btree block */
1413 xfs_bmbt_key_t *rkp; /* right btree key */
1414 xfs_bmbt_ptr_t *rpp; /* right address pointer */
1415 xfs_bmbt_rec_t *rrp=NULL; /* right record pointer */
1416 struct xfs_btree_cur *tcur; /* temporary btree cursor */
1417
1418 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1419 XFS_BMBT_TRACE_ARGI(cur, level);
1420 if (level == cur->bc_nlevels - 1) {
1421 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1422 *stat = 0;
1423 return 0;
1424 }
1425 lbp = cur->bc_bufs[level];
1426 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1427 #ifdef DEBUG
1428 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
1429 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1430 return error;
1431 }
1432 #endif
1433 if (INT_GET(left->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO) {
1434 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1435 *stat = 0;
1436 return 0;
1437 }
1438 if (cur->bc_ptrs[level] >= INT_GET(left->bb_numrecs, ARCH_CONVERT)) {
1439 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1440 *stat = 0;
1441 return 0;
1442 }
1443 mp = cur->bc_mp;
1444 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, INT_GET(left->bb_rightsib, ARCH_CONVERT), 0,
1445 &rbp, XFS_BMAP_BTREE_REF))) {
1446 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1447 return error;
1448 }
1449 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1450 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
1451 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1452 return error;
1453 }
1454 if (INT_GET(right->bb_numrecs, ARCH_CONVERT) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
1455 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1456 *stat = 0;
1457 return 0;
1458 }
1459 if (level > 0) {
1460 lkp = XFS_BMAP_KEY_IADDR(left, INT_GET(left->bb_numrecs, ARCH_CONVERT), cur);
1461 lpp = XFS_BMAP_PTR_IADDR(left, INT_GET(left->bb_numrecs, ARCH_CONVERT), cur);
1462 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1463 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1464 #ifdef DEBUG
1465 for (i = INT_GET(right->bb_numrecs, ARCH_CONVERT) - 1; i >= 0; i--) {
1466 if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i], ARCH_CONVERT), level))) {
1467 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1468 return error;
1469 }
1470 }
1471 #endif
1472 memmove(rkp + 1, rkp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rkp));
1473 memmove(rpp + 1, rpp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rpp));
1474 #ifdef DEBUG
1475 if ((error = xfs_btree_check_lptr(cur, INT_GET(*lpp, ARCH_CONVERT), level))) {
1476 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1477 return error;
1478 }
1479 #endif
1480 *rkp = *lkp;
1481 *rpp = *lpp; /* INT_: direct copy */
1482 xfs_bmbt_log_keys(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1);
1483 xfs_bmbt_log_ptrs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1);
1484 } else {
1485 lrp = XFS_BMAP_REC_IADDR(left, INT_GET(left->bb_numrecs, ARCH_CONVERT), cur);
1486 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1487 memmove(rrp + 1, rrp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rrp));
1488 *rrp = *lrp;
1489 xfs_bmbt_log_recs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1);
1490 INT_SET(key.br_startoff, ARCH_CONVERT,
1491 xfs_bmbt_disk_get_startoff(rrp));
1492 rkp = &key;
1493 }
1494 INT_MOD(left->bb_numrecs, ARCH_CONVERT, -1);
1495 xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
1496 INT_MOD(right->bb_numrecs, ARCH_CONVERT, +1);
1497 #ifdef DEBUG
1498 if (level > 0)
1499 xfs_btree_check_key(XFS_BTNUM_BMAP, rkp, rkp + 1);
1500 else
1501 xfs_btree_check_rec(XFS_BTNUM_BMAP, rrp, rrp + 1);
1502 #endif
1503 xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
1504 if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
1505 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1506 return error;
1507 }
1508 i = xfs_btree_lastrec(tcur, level);
1509 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
1510 if ((error = xfs_bmbt_increment(tcur, level, &i))) {
1511 XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
1512 goto error1;
1513 }
1514 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
1515 if ((error = xfs_bmbt_updkey(tcur, rkp, level + 1))) {
1516 XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
1517 goto error1;
1518 }
1519 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
1520 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1521 *stat = 1;
1522 return 0;
1523 error0:
1524 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1525 error1:
1526 xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
1527 return error;
1528 }
1529
1530 /*
1531 * Determine the extent state.
1532 */
1533 /* ARGSUSED */
1534 STATIC xfs_exntst_t
1535 xfs_extent_state(
1536 xfs_filblks_t blks,
1537 int extent_flag)
1538 {
1539 if (extent_flag) {
1540 ASSERT(blks != 0); /* saved for DMIG */
1541 return XFS_EXT_UNWRITTEN;
1542 }
1543 return XFS_EXT_NORM;
1544 }
1545
1546
1547 /*
1548 * Split cur/level block in half.
1549 * Return new block number and its first record (to be inserted into parent).
1550 */
1551 STATIC int /* error */
1552 xfs_bmbt_split(
1553 xfs_btree_cur_t *cur,
1554 int level,
1555 xfs_fsblock_t *bnop,
1556 xfs_bmbt_key_t *keyp,
1557 xfs_btree_cur_t **curp,
1558 int *stat) /* success/failure */
1559 {
1560 xfs_alloc_arg_t args; /* block allocation args */
1561 int error; /* error return value */
1562 #ifdef XFS_BMBT_TRACE
1563 static char fname[] = "xfs_bmbt_split";
1564 #endif
1565 int i; /* loop counter */
1566 xfs_fsblock_t lbno; /* left sibling block number */
1567 xfs_buf_t *lbp; /* left buffer pointer */
1568 xfs_bmbt_block_t *left; /* left btree block */
1569 xfs_bmbt_key_t *lkp; /* left btree key */
1570 xfs_bmbt_ptr_t *lpp; /* left address pointer */
1571 xfs_bmbt_rec_t *lrp; /* left record pointer */
1572 xfs_buf_t *rbp; /* right buffer pointer */
1573 xfs_bmbt_block_t *right; /* right btree block */
1574 xfs_bmbt_key_t *rkp; /* right btree key */
1575 xfs_bmbt_ptr_t *rpp; /* right address pointer */
1576 xfs_bmbt_block_t *rrblock; /* right-right btree block */
1577 xfs_buf_t *rrbp; /* right-right buffer pointer */
1578 xfs_bmbt_rec_t *rrp; /* right record pointer */
1579
1580 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1581 XFS_BMBT_TRACE_ARGIFK(cur, level, *bnop, keyp);
1582 args.tp = cur->bc_tp;
1583 args.mp = cur->bc_mp;
1584 lbp = cur->bc_bufs[level];
1585 lbno = XFS_DADDR_TO_FSB(args.mp, XFS_BUF_ADDR(lbp));
1586 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1587 args.fsbno = cur->bc_private.b.firstblock;
1588 if (args.fsbno == NULLFSBLOCK) {
1589 args.fsbno = lbno;
1590 args.type = XFS_ALLOCTYPE_START_BNO;
1591 } else if (cur->bc_private.b.flist->xbf_low)
1592 args.type = XFS_ALLOCTYPE_FIRST_AG;
1593 else
1594 args.type = XFS_ALLOCTYPE_NEAR_BNO;
1595 args.mod = args.minleft = args.alignment = args.total = args.isfl =
1596 args.userdata = args.minalignslop = 0;
1597 args.minlen = args.maxlen = args.prod = 1;
1598 args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
1599 if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
1600 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1601 return XFS_ERROR(ENOSPC);
1602 }
1603 if ((error = xfs_alloc_vextent(&args))) {
1604 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1605 return error;
1606 }
1607 if (args.fsbno == NULLFSBLOCK) {
1608 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1609 *stat = 0;
1610 return 0;
1611 }
1612 ASSERT(args.len == 1);
1613 cur->bc_private.b.firstblock = args.fsbno;
1614 cur->bc_private.b.allocated++;
1615 cur->bc_private.b.ip->i_d.di_nblocks++;
1616 xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
1617 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
1618 XFS_TRANS_DQ_BCOUNT, 1L);
1619 rbp = xfs_btree_get_bufl(args.mp, args.tp, args.fsbno, 0);
1620 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1621 #ifdef DEBUG
1622 if ((error = xfs_btree_check_lblock(cur, left, level, rbp))) {
1623 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1624 return error;
1625 }
1626 #endif
1627 INT_SET(right->bb_magic, ARCH_CONVERT, XFS_BMAP_MAGIC);
1628 right->bb_level = left->bb_level; /* INT_: direct copy */
1629 INT_SET(right->bb_numrecs, ARCH_CONVERT, (__uint16_t)(INT_GET(left->bb_numrecs, ARCH_CONVERT) / 2));
1630 if ((INT_GET(left->bb_numrecs, ARCH_CONVERT) & 1) &&
1631 cur->bc_ptrs[level] <= INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1)
1632 INT_MOD(right->bb_numrecs, ARCH_CONVERT, +1);
1633 i = INT_GET(left->bb_numrecs, ARCH_CONVERT) - INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1;
1634 if (level > 0) {
1635 lkp = XFS_BMAP_KEY_IADDR(left, i, cur);
1636 lpp = XFS_BMAP_PTR_IADDR(left, i, cur);
1637 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1638 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1639 #ifdef DEBUG
1640 for (i = 0; i < INT_GET(right->bb_numrecs, ARCH_CONVERT); i++) {
1641 if ((error = xfs_btree_check_lptr(cur, INT_GET(lpp[i], ARCH_CONVERT), level))) {
1642 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1643 return error;
1644 }
1645 }
1646 #endif
1647 memcpy(rkp, lkp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rkp));
1648 memcpy(rpp, lpp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rpp));
1649 xfs_bmbt_log_keys(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT));
1650 xfs_bmbt_log_ptrs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT));
1651 keyp->br_startoff = INT_GET(rkp->br_startoff, ARCH_CONVERT);
1652 } else {
1653 lrp = XFS_BMAP_REC_IADDR(left, i, cur);
1654 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1655 memcpy(rrp, lrp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rrp));
1656 xfs_bmbt_log_recs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT));
1657 keyp->br_startoff = xfs_bmbt_disk_get_startoff(rrp);
1658 }
1659 INT_MOD(left->bb_numrecs, ARCH_CONVERT, -(INT_GET(right->bb_numrecs, ARCH_CONVERT)));
1660 right->bb_rightsib = left->bb_rightsib; /* INT_: direct copy */
1661 INT_SET(left->bb_rightsib, ARCH_CONVERT, args.fsbno);
1662 INT_SET(right->bb_leftsib, ARCH_CONVERT, lbno);
1663 xfs_bmbt_log_block(cur, rbp, XFS_BB_ALL_BITS);
1664 xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
1665 if (INT_GET(right->bb_rightsib, ARCH_CONVERT) != NULLDFSBNO) {
1666 if ((error = xfs_btree_read_bufl(args.mp, args.tp,
1667 INT_GET(right->bb_rightsib, ARCH_CONVERT), 0, &rrbp,
1668 XFS_BMAP_BTREE_REF))) {
1669 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1670 return error;
1671 }
1672 rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
1673 if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
1674 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1675 return error;
1676 }
1677 INT_SET(rrblock->bb_leftsib, ARCH_CONVERT, args.fsbno);
1678 xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
1679 }
1680 if (cur->bc_ptrs[level] > INT_GET(left->bb_numrecs, ARCH_CONVERT) + 1) {
1681 xfs_btree_setbuf(cur, level, rbp);
1682 cur->bc_ptrs[level] -= INT_GET(left->bb_numrecs, ARCH_CONVERT);
1683 }
1684 if (level + 1 < cur->bc_nlevels) {
1685 if ((error = xfs_btree_dup_cursor(cur, curp))) {
1686 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1687 return error;
1688 }
1689 (*curp)->bc_ptrs[level + 1]++;
1690 }
1691 *bnop = args.fsbno;
1692 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1693 *stat = 1;
1694 return 0;
1695 }
1696
1697
1698 /*
1699 * Update keys for the record.
1700 */
1701 STATIC int
1702 xfs_bmbt_updkey(
1703 xfs_btree_cur_t *cur,
1704 xfs_bmbt_key_t *keyp, /* on-disk format */
1705 int level)
1706 {
1707 xfs_bmbt_block_t *block;
1708 xfs_buf_t *bp;
1709 #ifdef DEBUG
1710 int error;
1711 #endif
1712 #ifdef XFS_BMBT_TRACE
1713 static char fname[] = "xfs_bmbt_updkey";
1714 #endif
1715 xfs_bmbt_key_t *kp;
1716 int ptr;
1717
1718 ASSERT(level >= 1);
1719 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1720 XFS_BMBT_TRACE_ARGIK(cur, level, keyp);
1721 for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
1722 block = xfs_bmbt_get_block(cur, level, &bp);
1723 #ifdef DEBUG
1724 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1725 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1726 return error;
1727 }
1728 #endif
1729 ptr = cur->bc_ptrs[level];
1730 kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
1731 *kp = *keyp;
1732 xfs_bmbt_log_keys(cur, bp, ptr, ptr);
1733 }
1734 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1735 return 0;
1736 }
1737
1738 /*
1739 * Convert on-disk form of btree root to in-memory form.
1740 */
1741 void
1742 xfs_bmdr_to_bmbt(
1743 xfs_bmdr_block_t *dblock,
1744 int dblocklen,
1745 xfs_bmbt_block_t *rblock,
1746 int rblocklen)
1747 {
1748 int dmxr;
1749 xfs_bmbt_key_t *fkp;
1750 xfs_bmbt_ptr_t *fpp;
1751 xfs_bmbt_key_t *tkp;
1752 xfs_bmbt_ptr_t *tpp;
1753
1754 INT_SET(rblock->bb_magic, ARCH_CONVERT, XFS_BMAP_MAGIC);
1755 rblock->bb_level = dblock->bb_level; /* both in on-disk format */
1756 ASSERT(INT_GET(rblock->bb_level, ARCH_CONVERT) > 0);
1757 rblock->bb_numrecs = dblock->bb_numrecs;/* both in on-disk format */
1758 INT_SET(rblock->bb_leftsib, ARCH_CONVERT, NULLDFSBNO);
1759 INT_SET(rblock->bb_rightsib, ARCH_CONVERT, NULLDFSBNO);
1760 dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
1761 fkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
1762 tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
1763 fpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
1764 tpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
1765 dmxr = INT_GET(dblock->bb_numrecs, ARCH_CONVERT);
1766 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
1767 memcpy(tpp, fpp, sizeof(*fpp) * dmxr); /* INT_: direct copy */
1768 }
1769
1770 /*
1771 * Decrement cursor by one record at the level.
1772 * For nonzero levels the leaf-ward information is untouched.
1773 */
1774 int /* error */
1775 xfs_bmbt_decrement(
1776 xfs_btree_cur_t *cur,
1777 int level,
1778 int *stat) /* success/failure */
1779 {
1780 xfs_bmbt_block_t *block;
1781 xfs_buf_t *bp;
1782 int error; /* error return value */
1783 #ifdef XFS_BMBT_TRACE
1784 static char fname[] = "xfs_bmbt_decrement";
1785 #endif
1786 xfs_fsblock_t fsbno;
1787 int lev;
1788 xfs_mount_t *mp;
1789 xfs_trans_t *tp;
1790
1791 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1792 XFS_BMBT_TRACE_ARGI(cur, level);
1793 ASSERT(level < cur->bc_nlevels);
1794 if (level < cur->bc_nlevels - 1)
1795 xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
1796 if (--cur->bc_ptrs[level] > 0) {
1797 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1798 *stat = 1;
1799 return 0;
1800 }
1801 block = xfs_bmbt_get_block(cur, level, &bp);
1802 #ifdef DEBUG
1803 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1804 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1805 return error;
1806 }
1807 #endif
1808 if (INT_GET(block->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO) {
1809 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1810 *stat = 0;
1811 return 0;
1812 }
1813 for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
1814 if (--cur->bc_ptrs[lev] > 0)
1815 break;
1816 if (lev < cur->bc_nlevels - 1)
1817 xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
1818 }
1819 if (lev == cur->bc_nlevels) {
1820 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1821 *stat = 0;
1822 return 0;
1823 }
1824 tp = cur->bc_tp;
1825 mp = cur->bc_mp;
1826 for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
1827 fsbno = INT_GET(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur), ARCH_CONVERT);
1828 if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
1829 XFS_BMAP_BTREE_REF))) {
1830 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1831 return error;
1832 }
1833 lev--;
1834 xfs_btree_setbuf(cur, lev, bp);
1835 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1836 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
1837 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1838 return error;
1839 }
1840 cur->bc_ptrs[lev] = INT_GET(block->bb_numrecs, ARCH_CONVERT);
1841 }
1842 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1843 *stat = 1;
1844 return 0;
1845 }
1846
1847 /*
1848 * Delete the record pointed to by cur.
1849 */
1850 int /* error */
1851 xfs_bmbt_delete(
1852 xfs_btree_cur_t *cur,
1853 int *stat) /* success/failure */
1854 {
1855 int error; /* error return value */
1856 #ifdef XFS_BMBT_TRACE
1857 static char fname[] = "xfs_bmbt_delete";
1858 #endif
1859 int i;
1860 int level;
1861
1862 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1863 for (level = 0, i = 2; i == 2; level++) {
1864 if ((error = xfs_bmbt_delrec(cur, level, &i))) {
1865 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1866 return error;
1867 }
1868 }
1869 if (i == 0) {
1870 for (level = 1; level < cur->bc_nlevels; level++) {
1871 if (cur->bc_ptrs[level] == 0) {
1872 if ((error = xfs_bmbt_decrement(cur, level,
1873 &i))) {
1874 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1875 return error;
1876 }
1877 break;
1878 }
1879 }
1880 }
1881 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1882 *stat = i;
1883 return 0;
1884 }
1885
1886 /*
1887 * Convert a compressed bmap extent record to an uncompressed form.
1888 * This code must be in sync with the routines xfs_bmbt_get_startoff,
1889 * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
1890 */
1891
1892 STATIC __inline__ void
1893 __xfs_bmbt_get_all(
1894 __uint64_t l0,
1895 __uint64_t l1,
1896 xfs_bmbt_irec_t *s)
1897 {
1898 int ext_flag;
1899 xfs_exntst_t st;
1900
1901 ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
1902 s->br_startoff = ((xfs_fileoff_t)l0 &
1903 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
1904 #if XFS_BIG_BLKNOS
1905 s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) |
1906 (((xfs_fsblock_t)l1) >> 21);
1907 #else
1908 #ifdef DEBUG
1909 {
1910 xfs_dfsbno_t b;
1911
1912 b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) |
1913 (((xfs_dfsbno_t)l1) >> 21);
1914 ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
1915 s->br_startblock = (xfs_fsblock_t)b;
1916 }
1917 #else /* !DEBUG */
1918 s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
1919 #endif /* DEBUG */
1920 #endif /* XFS_BIG_BLKNOS */
1921 s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21));
1922 /* This is xfs_extent_state() in-line */
1923 if (ext_flag) {
1924 ASSERT(s->br_blockcount != 0); /* saved for DMIG */
1925 st = XFS_EXT_UNWRITTEN;
1926 } else
1927 st = XFS_EXT_NORM;
1928 s->br_state = st;
1929 }
1930
1931 void
1932 xfs_bmbt_get_all(
1933 xfs_bmbt_rec_t *r,
1934 xfs_bmbt_irec_t *s)
1935 {
1936 __xfs_bmbt_get_all(r->l0, r->l1, s);
1937 }
1938
1939 /*
1940 * Get the block pointer for the given level of the cursor.
1941 * Fill in the buffer pointer, if applicable.
1942 */
1943 xfs_bmbt_block_t *
1944 xfs_bmbt_get_block(
1945 xfs_btree_cur_t *cur,
1946 int level,
1947 xfs_buf_t **bpp)
1948 {
1949 xfs_ifork_t *ifp;
1950 xfs_bmbt_block_t *rval;
1951
1952 if (level < cur->bc_nlevels - 1) {
1953 *bpp = cur->bc_bufs[level];
1954 rval = XFS_BUF_TO_BMBT_BLOCK(*bpp);
1955 } else {
1956 *bpp = NULL;
1957 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
1958 cur->bc_private.b.whichfork);
1959 rval = ifp->if_broot;
1960 }
1961 return rval;
1962 }
1963
1964 /*
1965 * Extract the blockcount field from an in memory bmap extent record.
1966 */
1967 xfs_filblks_t
1968 xfs_bmbt_get_blockcount(
1969 xfs_bmbt_rec_t *r)
1970 {
1971 return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
1972 }
1973
1974 /*
1975 * Extract the startblock field from an in memory bmap extent record.
1976 */
1977 xfs_fsblock_t
1978 xfs_bmbt_get_startblock(
1979 xfs_bmbt_rec_t *r)
1980 {
1981 #if XFS_BIG_BLKNOS
1982 return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) |
1983 (((xfs_fsblock_t)r->l1) >> 21);
1984 #else
1985 #ifdef DEBUG
1986 xfs_dfsbno_t b;
1987
1988 b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) |
1989 (((xfs_dfsbno_t)r->l1) >> 21);
1990 ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
1991 return (xfs_fsblock_t)b;
1992 #else /* !DEBUG */
1993 return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
1994 #endif /* DEBUG */
1995 #endif /* XFS_BIG_BLKNOS */
1996 }
1997
1998 /*
1999 * Extract the startoff field from an in memory bmap extent record.
2000 */
2001 xfs_fileoff_t
2002 xfs_bmbt_get_startoff(
2003 xfs_bmbt_rec_t *r)
2004 {
2005 return ((xfs_fileoff_t)r->l0 &
2006 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
2007 }
2008
2009 xfs_exntst_t
2010 xfs_bmbt_get_state(
2011 xfs_bmbt_rec_t *r)
2012 {
2013 int ext_flag;
2014
2015 ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
2016 return xfs_extent_state(xfs_bmbt_get_blockcount(r),
2017 ext_flag);
2018 }
2019
2020 #if __BYTE_ORDER != __BIG_ENDIAN
2021 /* Endian flipping versions of the bmbt extraction functions */
2022 void
2023 xfs_bmbt_disk_get_all(
2024 xfs_bmbt_rec_t *r,
2025 xfs_bmbt_irec_t *s)
2026 {
2027 __uint64_t l0, l1;
2028
2029 l0 = INT_GET(r->l0, ARCH_CONVERT);
2030 l1 = INT_GET(r->l1, ARCH_CONVERT);
2031
2032 __xfs_bmbt_get_all(l0, l1, s);
2033 }
2034
2035 /*
2036 * Extract the blockcount field from an on disk bmap extent record.
2037 */
2038 xfs_filblks_t
2039 xfs_bmbt_disk_get_blockcount(
2040 xfs_bmbt_rec_t *r)
2041 {
2042 return (xfs_filblks_t)(INT_GET(r->l1, ARCH_CONVERT) & XFS_MASK64LO(21));
2043 }
2044
2045 /*
2046 * Extract the startblock field from an on disk bmap extent record.
2047 */
2048 xfs_fsblock_t
2049 xfs_bmbt_disk_get_startblock(
2050 xfs_bmbt_rec_t *r)
2051 {
2052 #if XFS_BIG_BLKNOS
2053 return (((xfs_fsblock_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
2054 (((xfs_fsblock_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
2055 #else
2056 #ifdef DEBUG
2057 xfs_dfsbno_t b;
2058
2059 b = (((xfs_dfsbno_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
2060 (((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
2061 ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
2062 return (xfs_fsblock_t)b;
2063 #else /* !DEBUG */
2064 return (xfs_fsblock_t)(((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
2065 #endif /* DEBUG */
2066 #endif /* XFS_BIG_BLKNOS */
2067 }
2068
2069 /*
2070 * Extract the startoff field from a disk format bmap extent record.
2071 */
2072 xfs_fileoff_t
2073 xfs_bmbt_disk_get_startoff(
2074 xfs_bmbt_rec_t *r)
2075 {
2076 return ((xfs_fileoff_t)INT_GET(r->l0, ARCH_CONVERT) &
2077 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
2078 }
2079
2080 xfs_exntst_t
2081 xfs_bmbt_disk_get_state(
2082 xfs_bmbt_rec_t *r)
2083 {
2084 int ext_flag;
2085
2086 ext_flag = (int)((INT_GET(r->l0, ARCH_CONVERT)) >> (64 - BMBT_EXNTFLAG_BITLEN));
2087 return xfs_extent_state(xfs_bmbt_disk_get_blockcount(r),
2088 ext_flag);
2089 }
2090 #endif
2091
2092
2093 /*
2094 * Increment cursor by one record at the level.
2095 * For nonzero levels the leaf-ward information is untouched.
2096 */
2097 int /* error */
2098 xfs_bmbt_increment(
2099 xfs_btree_cur_t *cur,
2100 int level,
2101 int *stat) /* success/failure */
2102 {
2103 xfs_bmbt_block_t *block;
2104 xfs_buf_t *bp;
2105 int error; /* error return value */
2106 #ifdef XFS_BMBT_TRACE
2107 static char fname[] = "xfs_bmbt_increment";
2108 #endif
2109 xfs_fsblock_t fsbno;
2110 int lev;
2111 xfs_mount_t *mp;
2112 xfs_trans_t *tp;
2113
2114 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2115 XFS_BMBT_TRACE_ARGI(cur, level);
2116 ASSERT(level < cur->bc_nlevels);
2117 if (level < cur->bc_nlevels - 1)
2118 xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
2119 block = xfs_bmbt_get_block(cur, level, &bp);
2120 #ifdef DEBUG
2121 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
2122 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2123 return error;
2124 }
2125 #endif
2126 if (++cur->bc_ptrs[level] <= INT_GET(block->bb_numrecs, ARCH_CONVERT)) {
2127 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2128 *stat = 1;
2129 return 0;
2130 }
2131 if (INT_GET(block->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO) {
2132 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2133 *stat = 0;
2134 return 0;
2135 }
2136 for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
2137 block = xfs_bmbt_get_block(cur, lev, &bp);
2138 #ifdef DEBUG
2139 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
2140 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2141 return error;
2142 }
2143 #endif
2144 if (++cur->bc_ptrs[lev] <= INT_GET(block->bb_numrecs, ARCH_CONVERT))
2145 break;
2146 if (lev < cur->bc_nlevels - 1)
2147 xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
2148 }
2149 if (lev == cur->bc_nlevels) {
2150 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2151 *stat = 0;
2152 return 0;
2153 }
2154 tp = cur->bc_tp;
2155 mp = cur->bc_mp;
2156 for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
2157 fsbno = INT_GET(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur), ARCH_CONVERT);
2158 if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
2159 XFS_BMAP_BTREE_REF))) {
2160 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2161 return error;
2162 }
2163 lev--;
2164 xfs_btree_setbuf(cur, lev, bp);
2165 block = XFS_BUF_TO_BMBT_BLOCK(bp);
2166 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
2167 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2168 return error;
2169 }
2170 cur->bc_ptrs[lev] = 1;
2171 }
2172 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2173 *stat = 1;
2174 return 0;
2175 }
2176
2177 /*
2178 * Insert the current record at the point referenced by cur.
2179 */
2180 int /* error */
2181 xfs_bmbt_insert(
2182 xfs_btree_cur_t *cur,
2183 int *stat) /* success/failure */
2184 {
2185 int error; /* error return value */
2186 #ifdef XFS_BMBT_TRACE
2187 static char fname[] = "xfs_bmbt_insert";
2188 #endif
2189 int i;
2190 int level;
2191 xfs_fsblock_t nbno;
2192 xfs_btree_cur_t *ncur;
2193 xfs_bmbt_rec_t nrec;
2194 xfs_btree_cur_t *pcur;
2195
2196 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2197 level = 0;
2198 nbno = NULLFSBLOCK;
2199 xfs_bmbt_disk_set_all(&nrec, &cur->bc_rec.b);
2200 ncur = (xfs_btree_cur_t *)0;
2201 pcur = cur;
2202 do {
2203 if ((error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur,
2204 &i))) {
2205 if (pcur != cur)
2206 xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR);
2207 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2208 return error;
2209 }
2210 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
2211 if (pcur != cur && (ncur || nbno == NULLFSBLOCK)) {
2212 cur->bc_nlevels = pcur->bc_nlevels;
2213 cur->bc_private.b.allocated +=
2214 pcur->bc_private.b.allocated;
2215 pcur->bc_private.b.allocated = 0;
2216 ASSERT((cur->bc_private.b.firstblock != NULLFSBLOCK) ||
2217 (cur->bc_private.b.ip->i_d.di_flags &
2218 XFS_DIFLAG_REALTIME));
2219 cur->bc_private.b.firstblock =
2220 pcur->bc_private.b.firstblock;
2221 ASSERT(cur->bc_private.b.flist ==
2222 pcur->bc_private.b.flist);
2223 xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR);
2224 }
2225 if (ncur) {
2226 pcur = ncur;
2227 ncur = (xfs_btree_cur_t *)0;
2228 }
2229 } while (nbno != NULLFSBLOCK);
2230 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2231 *stat = i;
2232 return 0;
2233 error0:
2234 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2235 return error;
2236 }
2237
2238 /*
2239 * Log fields from the btree block header.
2240 */
2241 void
2242 xfs_bmbt_log_block(
2243 xfs_btree_cur_t *cur,
2244 xfs_buf_t *bp,
2245 int fields)
2246 {
2247 int first;
2248 #ifdef XFS_BMBT_TRACE
2249 static char fname[] = "xfs_bmbt_log_block";
2250 #endif
2251 int last;
2252 xfs_trans_t *tp;
2253 static const short offsets[] = {
2254 offsetof(xfs_bmbt_block_t, bb_magic),
2255 offsetof(xfs_bmbt_block_t, bb_level),
2256 offsetof(xfs_bmbt_block_t, bb_numrecs),
2257 offsetof(xfs_bmbt_block_t, bb_leftsib),
2258 offsetof(xfs_bmbt_block_t, bb_rightsib),
2259 sizeof(xfs_bmbt_block_t)
2260 };
2261
2262 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2263 XFS_BMBT_TRACE_ARGBI(cur, bp, fields);
2264 tp = cur->bc_tp;
2265 if (bp) {
2266 xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first,
2267 &last);
2268 xfs_trans_log_buf(tp, bp, first, last);
2269 } else
2270 xfs_trans_log_inode(tp, cur->bc_private.b.ip,
2271 XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
2272 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2273 }
2274
2275 /*
2276 * Log record values from the btree block.
2277 */
2278 void
2279 xfs_bmbt_log_recs(
2280 xfs_btree_cur_t *cur,
2281 xfs_buf_t *bp,
2282 int rfirst,
2283 int rlast)
2284 {
2285 xfs_bmbt_block_t *block;
2286 int first;
2287 #ifdef XFS_BMBT_TRACE
2288 static char fname[] = "xfs_bmbt_log_recs";
2289 #endif
2290 int last;
2291 xfs_bmbt_rec_t *rp;
2292 xfs_trans_t *tp;
2293
2294 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2295 XFS_BMBT_TRACE_ARGBII(cur, bp, rfirst, rlast);
2296 ASSERT(bp);
2297 tp = cur->bc_tp;
2298 block = XFS_BUF_TO_BMBT_BLOCK(bp);
2299 rp = XFS_BMAP_REC_DADDR(block, 1, cur);
2300 first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block);
2301 last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block);
2302 xfs_trans_log_buf(tp, bp, first, last);
2303 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2304 }
2305
2306 int /* error */
2307 xfs_bmbt_lookup_eq(
2308 xfs_btree_cur_t *cur,
2309 xfs_fileoff_t off,
2310 xfs_fsblock_t bno,
2311 xfs_filblks_t len,
2312 int *stat) /* success/failure */
2313 {
2314 cur->bc_rec.b.br_startoff = off;
2315 cur->bc_rec.b.br_startblock = bno;
2316 cur->bc_rec.b.br_blockcount = len;
2317 return xfs_bmbt_lookup(cur, XFS_LOOKUP_EQ, stat);
2318 }
2319
2320 int /* error */
2321 xfs_bmbt_lookup_ge(
2322 xfs_btree_cur_t *cur,
2323 xfs_fileoff_t off,
2324 xfs_fsblock_t bno,
2325 xfs_filblks_t len,
2326 int *stat) /* success/failure */
2327 {
2328 cur->bc_rec.b.br_startoff = off;
2329 cur->bc_rec.b.br_startblock = bno;
2330 cur->bc_rec.b.br_blockcount = len;
2331 return xfs_bmbt_lookup(cur, XFS_LOOKUP_GE, stat);
2332 }
2333
2334 int /* error */
2335 xfs_bmbt_lookup_le(
2336 xfs_btree_cur_t *cur,
2337 xfs_fileoff_t off,
2338 xfs_fsblock_t bno,
2339 xfs_filblks_t len,
2340 int *stat) /* success/failure */
2341 {
2342 cur->bc_rec.b.br_startoff = off;
2343 cur->bc_rec.b.br_startblock = bno;
2344 cur->bc_rec.b.br_blockcount = len;
2345 return xfs_bmbt_lookup(cur, XFS_LOOKUP_LE, stat);
2346 }
2347
2348 /*
2349 * Give the bmap btree a new root block. Copy the old broot contents
2350 * down into a real block and make the broot point to it.
2351 */
2352 int /* error */
2353 xfs_bmbt_newroot(
2354 xfs_btree_cur_t *cur, /* btree cursor */
2355 int *logflags, /* logging flags for inode */
2356 int *stat) /* return status - 0 fail */
2357 {
2358 xfs_alloc_arg_t args; /* allocation arguments */
2359 xfs_bmbt_block_t *block; /* bmap btree block */
2360 xfs_buf_t *bp; /* buffer for block */
2361 xfs_bmbt_block_t *cblock; /* child btree block */
2362 xfs_bmbt_key_t *ckp; /* child key pointer */
2363 xfs_bmbt_ptr_t *cpp; /* child ptr pointer */
2364 int error; /* error return code */
2365 #ifdef XFS_BMBT_TRACE
2366 static char fname[] = "xfs_bmbt_newroot";
2367 #endif
2368 #ifdef DEBUG
2369 int i; /* loop counter */
2370 #endif
2371 xfs_bmbt_key_t *kp; /* pointer to bmap btree key */
2372 int level; /* btree level */
2373 xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
2374
2375 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2376 level = cur->bc_nlevels - 1;
2377 block = xfs_bmbt_get_block(cur, level, &bp);
2378 /*
2379 * Copy the root into a real block.
2380 */
2381 args.mp = cur->bc_mp;
2382 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
2383 args.tp = cur->bc_tp;
2384 args.fsbno = cur->bc_private.b.firstblock;
2385 args.mod = args.minleft = args.alignment = args.total = args.isfl =
2386 args.userdata = args.minalignslop = 0;
2387 args.minlen = args.maxlen = args.prod = 1;
2388 args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
2389 if (args.fsbno == NULLFSBLOCK) {
2390 #ifdef DEBUG
2391 if ((error = xfs_btree_check_lptr(cur, INT_GET(*pp, ARCH_CONVERT), level))) {
2392 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2393 return error;
2394 }
2395 #endif
2396 args.fsbno = INT_GET(*pp, ARCH_CONVERT);
2397 args.type = XFS_ALLOCTYPE_START_BNO;
2398 } else if (args.wasdel)
2399 args.type = XFS_ALLOCTYPE_FIRST_AG;
2400 else
2401 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2402 if ((error = xfs_alloc_vextent(&args))) {
2403 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2404 return error;
2405 }
2406 if (args.fsbno == NULLFSBLOCK) {
2407 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2408 *stat = 0;
2409 return 0;
2410 }
2411 ASSERT(args.len == 1);
2412 cur->bc_private.b.firstblock = args.fsbno;
2413 cur->bc_private.b.allocated++;
2414 cur->bc_private.b.ip->i_d.di_nblocks++;
2415 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
2416 XFS_TRANS_DQ_BCOUNT, 1L);
2417 bp = xfs_btree_get_bufl(args.mp, cur->bc_tp, args.fsbno, 0);
2418 cblock = XFS_BUF_TO_BMBT_BLOCK(bp);
2419 *cblock = *block;
2420 INT_MOD(block->bb_level, ARCH_CONVERT, +1);
2421 INT_SET(block->bb_numrecs, ARCH_CONVERT, 1);
2422 cur->bc_nlevels++;
2423 cur->bc_ptrs[level + 1] = 1;
2424 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
2425 ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
2426 memcpy(ckp, kp, INT_GET(cblock->bb_numrecs, ARCH_CONVERT) * sizeof(*kp));
2427 cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
2428 #ifdef DEBUG
2429 for (i = 0; i < INT_GET(cblock->bb_numrecs, ARCH_CONVERT); i++) {
2430 if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i], ARCH_CONVERT), level))) {
2431 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2432 return error;
2433 }
2434 }
2435 #endif
2436 memcpy(cpp, pp, INT_GET(cblock->bb_numrecs, ARCH_CONVERT) * sizeof(*pp));
2437 #ifdef DEBUG
2438 if ((error = xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)args.fsbno,
2439 level))) {
2440 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2441 return error;
2442 }
2443 #endif
2444 INT_SET(*pp, ARCH_CONVERT, args.fsbno);
2445 xfs_iroot_realloc(cur->bc_private.b.ip, 1 - INT_GET(cblock->bb_numrecs, ARCH_CONVERT),
2446 cur->bc_private.b.whichfork);
2447 xfs_btree_setbuf(cur, level, bp);
2448 /*
2449 * Do all this logging at the end so that
2450 * the root is at the right level.
2451 */
2452 xfs_bmbt_log_block(cur, bp, XFS_BB_ALL_BITS);
2453 xfs_bmbt_log_keys(cur, bp, 1, INT_GET(cblock->bb_numrecs, ARCH_CONVERT));
2454 xfs_bmbt_log_ptrs(cur, bp, 1, INT_GET(cblock->bb_numrecs, ARCH_CONVERT));
2455 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2456 *logflags |=
2457 XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork);
2458 *stat = 1;
2459 return 0;
2460 }
2461
2462 /*
2463 * Set all the fields in a bmap extent record from the uncompressed form.
2464 */
2465 void
2466 xfs_bmbt_set_all(
2467 xfs_bmbt_rec_t *r,
2468 xfs_bmbt_irec_t *s)
2469 {
2470 int extent_flag;
2471
2472 ASSERT((s->br_state == XFS_EXT_NORM) ||
2473 (s->br_state == XFS_EXT_UNWRITTEN));
2474 extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
2475 ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
2476 ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
2477 #if XFS_BIG_BLKNOS
2478 ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
2479 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2480 ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2481 ((xfs_bmbt_rec_base_t)s->br_startblock >> 43);
2482 r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2483 ((xfs_bmbt_rec_base_t)s->br_blockcount &
2484 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2485 #else /* !XFS_BIG_BLKNOS */
2486 if (ISNULLSTARTBLOCK(s->br_startblock)) {
2487 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2488 ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2489 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2490 r->l1 = XFS_MASK64HI(11) |
2491 ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2492 ((xfs_bmbt_rec_base_t)s->br_blockcount &
2493 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2494 } else {
2495 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2496 ((xfs_bmbt_rec_base_t)s->br_startoff << 9);
2497 r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2498 ((xfs_bmbt_rec_base_t)s->br_blockcount &
2499 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2500 }
2501 #endif /* XFS_BIG_BLKNOS */
2502 }
2503
2504 /*
2505 * Set all the fields in a bmap extent record from the arguments.
2506 */
2507 void
2508 xfs_bmbt_set_allf(
2509 xfs_bmbt_rec_t *r,
2510 xfs_fileoff_t o,
2511 xfs_fsblock_t b,
2512 xfs_filblks_t c,
2513 xfs_exntst_t v)
2514 {
2515 int extent_flag;
2516
2517 ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
2518 extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
2519 ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
2520 ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
2521 #if XFS_BIG_BLKNOS
2522 ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
2523 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2524 ((xfs_bmbt_rec_base_t)o << 9) |
2525 ((xfs_bmbt_rec_base_t)b >> 43);
2526 r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
2527 ((xfs_bmbt_rec_base_t)c &
2528 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2529 #else /* !XFS_BIG_BLKNOS */
2530 if (ISNULLSTARTBLOCK(b)) {
2531 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2532 ((xfs_bmbt_rec_base_t)o << 9) |
2533 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2534 r->l1 = XFS_MASK64HI(11) |
2535 ((xfs_bmbt_rec_base_t)b << 21) |
2536 ((xfs_bmbt_rec_base_t)c &
2537 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2538 } else {
2539 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2540 ((xfs_bmbt_rec_base_t)o << 9);
2541 r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
2542 ((xfs_bmbt_rec_base_t)c &
2543 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2544 }
2545 #endif /* XFS_BIG_BLKNOS */
2546 }
2547
2548 #if __BYTE_ORDER != __BIG_ENDIAN
2549 /*
2550 * Set all the fields in a bmap extent record from the uncompressed form.
2551 */
2552 void
2553 xfs_bmbt_disk_set_all(
2554 xfs_bmbt_rec_t *r,
2555 xfs_bmbt_irec_t *s)
2556 {
2557 int extent_flag;
2558
2559 ASSERT((s->br_state == XFS_EXT_NORM) ||
2560 (s->br_state == XFS_EXT_UNWRITTEN));
2561 extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
2562 ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
2563 ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
2564 #if XFS_BIG_BLKNOS
2565 ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
2566 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2567 ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2568 ((xfs_bmbt_rec_base_t)s->br_startblock >> 43));
2569 INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2570 ((xfs_bmbt_rec_base_t)s->br_blockcount &
2571 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2572 #else /* !XFS_BIG_BLKNOS */
2573 if (ISNULLSTARTBLOCK(s->br_startblock)) {
2574 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2575 ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
2576 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2577 INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
2578 ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2579 ((xfs_bmbt_rec_base_t)s->br_blockcount &
2580 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2581 } else {
2582 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2583 ((xfs_bmbt_rec_base_t)s->br_startoff << 9));
2584 INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
2585 ((xfs_bmbt_rec_base_t)s->br_blockcount &
2586 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2587 }
2588 #endif /* XFS_BIG_BLKNOS */
2589 }
2590
2591 /*
2592 * Set all the fields in a disk format bmap extent record from the arguments.
2593 */
2594 void
2595 xfs_bmbt_disk_set_allf(
2596 xfs_bmbt_rec_t *r,
2597 xfs_fileoff_t o,
2598 xfs_fsblock_t b,
2599 xfs_filblks_t c,
2600 xfs_exntst_t v)
2601 {
2602 int extent_flag;
2603
2604 ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
2605 extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
2606 ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
2607 ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
2608 #if XFS_BIG_BLKNOS
2609 ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
2610 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2611 ((xfs_bmbt_rec_base_t)o << 9) |
2612 ((xfs_bmbt_rec_base_t)b >> 43));
2613 INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
2614 ((xfs_bmbt_rec_base_t)c &
2615 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2616 #else /* !XFS_BIG_BLKNOS */
2617 if (ISNULLSTARTBLOCK(b)) {
2618 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2619 ((xfs_bmbt_rec_base_t)o << 9) |
2620 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2621 INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
2622 ((xfs_bmbt_rec_base_t)b << 21) |
2623 ((xfs_bmbt_rec_base_t)c &
2624 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2625 } else {
2626 INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2627 ((xfs_bmbt_rec_base_t)o << 9));
2628 INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
2629 ((xfs_bmbt_rec_base_t)c &
2630 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2631 }
2632 #endif /* XFS_BIG_BLKNOS */
2633 }
2634 #endif
2635
2636 /*
2637 * Set the blockcount field in a bmap extent record.
2638 */
2639 void
2640 xfs_bmbt_set_blockcount(
2641 xfs_bmbt_rec_t *r,
2642 xfs_filblks_t v)
2643 {
2644 ASSERT((v & XFS_MASK64HI(43)) == 0);
2645 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
2646 (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
2647 }
2648
2649 /*
2650 * Set the startblock field in a bmap extent record.
2651 */
2652 void
2653 xfs_bmbt_set_startblock(
2654 xfs_bmbt_rec_t *r,
2655 xfs_fsblock_t v)
2656 {
2657 #if XFS_BIG_BLKNOS
2658 ASSERT((v & XFS_MASK64HI(12)) == 0);
2659 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) |
2660 (xfs_bmbt_rec_base_t)(v >> 43);
2661 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) |
2662 (xfs_bmbt_rec_base_t)(v << 21);
2663 #else /* !XFS_BIG_BLKNOS */
2664 if (ISNULLSTARTBLOCK(v)) {
2665 r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2666 r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) |
2667 ((xfs_bmbt_rec_base_t)v << 21) |
2668 (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2669 } else {
2670 r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2671 r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
2672 (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2673 }
2674 #endif /* XFS_BIG_BLKNOS */
2675 }
2676
2677 /*
2678 * Set the startoff field in a bmap extent record.
2679 */
2680 void
2681 xfs_bmbt_set_startoff(
2682 xfs_bmbt_rec_t *r,
2683 xfs_fileoff_t v)
2684 {
2685 ASSERT((v & XFS_MASK64HI(9)) == 0);
2686 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) |
2687 ((xfs_bmbt_rec_base_t)v << 9) |
2688 (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2689 }
2690
2691 /*
2692 * Set the extent state field in a bmap extent record.
2693 */
2694 void
2695 xfs_bmbt_set_state(
2696 xfs_bmbt_rec_t *r,
2697 xfs_exntst_t v)
2698 {
2699 ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
2700 if (v == XFS_EXT_NORM)
2701 r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN);
2702 else
2703 r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN);
2704 }
2705
2706 /*
2707 * Convert in-memory form of btree root to on-disk form.
2708 */
2709 void
2710 xfs_bmbt_to_bmdr(
2711 xfs_bmbt_block_t *rblock,
2712 int rblocklen,
2713 xfs_bmdr_block_t *dblock,
2714 int dblocklen)
2715 {
2716 int dmxr;
2717 xfs_bmbt_key_t *fkp;
2718 xfs_bmbt_ptr_t *fpp;
2719 xfs_bmbt_key_t *tkp;
2720 xfs_bmbt_ptr_t *tpp;
2721
2722 ASSERT(INT_GET(rblock->bb_magic, ARCH_CONVERT) == XFS_BMAP_MAGIC);
2723 ASSERT(INT_GET(rblock->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO);
2724 ASSERT(INT_GET(rblock->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO);
2725 ASSERT(INT_GET(rblock->bb_level, ARCH_CONVERT) > 0);
2726 dblock->bb_level = rblock->bb_level; /* both in on-disk format */
2727 dblock->bb_numrecs = rblock->bb_numrecs;/* both in on-disk format */
2728 dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
2729 fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
2730 tkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
2731 fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
2732 tpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
2733 dmxr = INT_GET(dblock->bb_numrecs, ARCH_CONVERT);
2734 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
2735 memcpy(tpp, fpp, sizeof(*fpp) * dmxr); /* INT_: direct copy */
2736 }
2737
2738 /*
2739 * Update the record to the passed values.
2740 */
2741 int
2742 xfs_bmbt_update(
2743 xfs_btree_cur_t *cur,
2744 xfs_fileoff_t off,
2745 xfs_fsblock_t bno,
2746 xfs_filblks_t len,
2747 xfs_exntst_t state)
2748 {
2749 xfs_bmbt_block_t *block;
2750 xfs_buf_t *bp;
2751 int error;
2752 #ifdef XFS_BMBT_TRACE
2753 static char fname[] = "xfs_bmbt_update";
2754 #endif
2755 xfs_bmbt_key_t key;
2756 int ptr;
2757 xfs_bmbt_rec_t *rp;
2758
2759 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2760 XFS_BMBT_TRACE_ARGFFFI(cur, (xfs_dfiloff_t)off, (xfs_dfsbno_t)bno,
2761 (xfs_dfilblks_t)len, (int)state);
2762 block = xfs_bmbt_get_block(cur, 0, &bp);
2763 #ifdef DEBUG
2764 if ((error = xfs_btree_check_lblock(cur, block, 0, bp))) {
2765 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2766 return error;
2767 }
2768 #endif
2769 ptr = cur->bc_ptrs[0];
2770 rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
2771 xfs_bmbt_disk_set_allf(rp, off, bno, len, state);
2772 xfs_bmbt_log_recs(cur, bp, ptr, ptr);
2773 if (ptr > 1) {
2774 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2775 return 0;
2776 }
2777 INT_SET(key.br_startoff, ARCH_CONVERT, off);
2778 if ((error = xfs_bmbt_updkey(cur, &key, 1))) {
2779 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2780 return error;
2781 }
2782 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2783 return 0;
2784 }
2785
2786 /*
2787 * Check an extent list, which has just been read, for
2788 * any bit in the extent flag field. ASSERT on debug
2789 * kernels, as this condition should not occur.
2790 * Return an error condition (1) if any flags found,
2791 * otherwise return 0.
2792 */
2793
2794 int
2795 xfs_check_nostate_extents(
2796 xfs_bmbt_rec_t *ep,
2797 xfs_extnum_t num)
2798 {
2799 for (; num > 0; num--, ep++) {
2800 if ((ep->l0 >>
2801 (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
2802 ASSERT(0);
2803 return 1;
2804 }
2805 }
2806 return 0;
2807 }
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