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shmem_file_write is redundant
[wrt350n-kernel.git] / fs / xfs / xfs_bmap_btree.c
blob32b49ec00fb521510b888cab245d06653acfed17
1 /*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_types.h"
21 #include "xfs_bit.h"
22 #include "xfs_log.h"
23 #include "xfs_inum.h"
24 #include "xfs_trans.h"
25 #include "xfs_sb.h"
26 #include "xfs_ag.h"
27 #include "xfs_dir2.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dir2_sf.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_inode_item.h"
38 #include "xfs_alloc.h"
39 #include "xfs_btree.h"
40 #include "xfs_ialloc.h"
41 #include "xfs_itable.h"
42 #include "xfs_bmap.h"
43 #include "xfs_error.h"
44 #include "xfs_quota.h"
45
46 #if defined(XFS_BMBT_TRACE)
47 ktrace_t *xfs_bmbt_trace_buf;
48 #endif
49
50 /*
51 * Prototypes for internal btree functions.
52 */
53
54
55 STATIC int xfs_bmbt_killroot(xfs_btree_cur_t *);
56 STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
57 STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
58 STATIC int xfs_bmbt_lshift(xfs_btree_cur_t *, int, int *);
59 STATIC int xfs_bmbt_rshift(xfs_btree_cur_t *, int, int *);
60 STATIC int xfs_bmbt_split(xfs_btree_cur_t *, int, xfs_fsblock_t *,
61 __uint64_t *, xfs_btree_cur_t **, int *);
62 STATIC int xfs_bmbt_updkey(xfs_btree_cur_t *, xfs_bmbt_key_t *, int);
63
64
65 #if defined(XFS_BMBT_TRACE)
66
67 static char ARGS[] = "args";
68 static char ENTRY[] = "entry";
69 static char ERROR[] = "error";
70 #undef EXIT
71 static char EXIT[] = "exit";
72
73 /*
74 * Add a trace buffer entry for the arguments given to the routine,
75 * generic form.
76 */
77 STATIC void
78 xfs_bmbt_trace_enter(
79 const char *func,
80 xfs_btree_cur_t *cur,
81 char *s,
82 int type,
83 int line,
84 __psunsigned_t a0,
85 __psunsigned_t a1,
86 __psunsigned_t a2,
87 __psunsigned_t a3,
88 __psunsigned_t a4,
89 __psunsigned_t a5,
90 __psunsigned_t a6,
91 __psunsigned_t a7,
92 __psunsigned_t a8,
93 __psunsigned_t a9,
94 __psunsigned_t a10)
95 {
96 xfs_inode_t *ip;
97 int whichfork;
98
99 ip = cur->bc_private.b.ip;
100 whichfork = cur->bc_private.b.whichfork;
101 ktrace_enter(xfs_bmbt_trace_buf,
102 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
103 (void *)func, (void *)s, (void *)ip, (void *)cur,
104 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
105 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
106 (void *)a8, (void *)a9, (void *)a10);
107 ASSERT(ip->i_btrace);
108 ktrace_enter(ip->i_btrace,
109 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
110 (void *)func, (void *)s, (void *)ip, (void *)cur,
111 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
112 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
113 (void *)a8, (void *)a9, (void *)a10);
114 }
115 /*
116 * Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
117 */
118 STATIC void
119 xfs_bmbt_trace_argbi(
120 const char *func,
121 xfs_btree_cur_t *cur,
122 xfs_buf_t *b,
123 int i,
124 int line)
125 {
126 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBI, line,
127 (__psunsigned_t)b, i, 0, 0,
128 0, 0, 0, 0,
129 0, 0, 0);
130 }
131
132 /*
133 * Add a trace buffer entry for arguments, for a buffer & 2 integer args.
134 */
135 STATIC void
136 xfs_bmbt_trace_argbii(
137 const char *func,
138 xfs_btree_cur_t *cur,
139 xfs_buf_t *b,
140 int i0,
141 int i1,
142 int line)
143 {
144 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBII, line,
145 (__psunsigned_t)b, i0, i1, 0,
146 0, 0, 0, 0,
147 0, 0, 0);
148 }
149
150 /*
151 * Add a trace buffer entry for arguments, for 3 block-length args
152 * and an integer arg.
153 */
154 STATIC void
155 xfs_bmbt_trace_argfffi(
156 const char *func,
157 xfs_btree_cur_t *cur,
158 xfs_dfiloff_t o,
159 xfs_dfsbno_t b,
160 xfs_dfilblks_t i,
161 int j,
162 int line)
163 {
164 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGFFFI, line,
165 o >> 32, (int)o, b >> 32, (int)b,
166 i >> 32, (int)i, (int)j, 0,
167 0, 0, 0);
168 }
169
170 /*
171 * Add a trace buffer entry for arguments, for one integer arg.
172 */
173 STATIC void
174 xfs_bmbt_trace_argi(
175 const char *func,
176 xfs_btree_cur_t *cur,
177 int i,
178 int line)
179 {
180 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGI, line,
181 i, 0, 0, 0,
182 0, 0, 0, 0,
183 0, 0, 0);
184 }
185
186 /*
187 * Add a trace buffer entry for arguments, for int, fsblock, key.
188 */
189 STATIC void
190 xfs_bmbt_trace_argifk(
191 const char *func,
192 xfs_btree_cur_t *cur,
193 int i,
194 xfs_fsblock_t f,
195 xfs_dfiloff_t o,
196 int line)
197 {
198 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
199 i, (xfs_dfsbno_t)f >> 32, (int)f, o >> 32,
200 (int)o, 0, 0, 0,
201 0, 0, 0);
202 }
203
204 /*
205 * Add a trace buffer entry for arguments, for int, fsblock, rec.
206 */
207 STATIC void
208 xfs_bmbt_trace_argifr(
209 const char *func,
210 xfs_btree_cur_t *cur,
211 int i,
212 xfs_fsblock_t f,
213 xfs_bmbt_rec_t *r,
214 int line)
215 {
216 xfs_dfsbno_t b;
217 xfs_dfilblks_t c;
218 xfs_dfsbno_t d;
219 xfs_dfiloff_t o;
220 xfs_bmbt_irec_t s;
221
222 d = (xfs_dfsbno_t)f;
223 xfs_bmbt_disk_get_all(r, &s);
224 o = (xfs_dfiloff_t)s.br_startoff;
225 b = (xfs_dfsbno_t)s.br_startblock;
226 c = s.br_blockcount;
227 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFR, line,
228 i, d >> 32, (int)d, o >> 32,
229 (int)o, b >> 32, (int)b, c >> 32,
230 (int)c, 0, 0);
231 }
232
233 /*
234 * Add a trace buffer entry for arguments, for int, key.
235 */
236 STATIC void
237 xfs_bmbt_trace_argik(
238 const char *func,
239 xfs_btree_cur_t *cur,
240 int i,
241 xfs_bmbt_key_t *k,
242 int line)
243 {
244 xfs_dfiloff_t o;
245
246 o = be64_to_cpu(k->br_startoff);
247 xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
248 i, o >> 32, (int)o, 0,
249 0, 0, 0, 0,
250 0, 0, 0);
251 }
252
253 /*
254 * Add a trace buffer entry for the cursor/operation.
255 */
256 STATIC void
257 xfs_bmbt_trace_cursor(
258 const char *func,
259 xfs_btree_cur_t *cur,
260 char *s,
261 int line)
262 {
263 xfs_bmbt_rec_host_t r;
264
265 xfs_bmbt_set_all(&r, &cur->bc_rec.b);
266 xfs_bmbt_trace_enter(func, cur, s, XFS_BMBT_KTRACE_CUR, line,
267 (cur->bc_nlevels << 24) | (cur->bc_private.b.flags << 16) |
268 cur->bc_private.b.allocated,
269 r.l0 >> 32, (int)r.l0,
270 r.l1 >> 32, (int)r.l1,
271 (unsigned long)cur->bc_bufs[0], (unsigned long)cur->bc_bufs[1],
272 (unsigned long)cur->bc_bufs[2], (unsigned long)cur->bc_bufs[3],
273 (cur->bc_ptrs[0] << 16) | cur->bc_ptrs[1],
274 (cur->bc_ptrs[2] << 16) | cur->bc_ptrs[3]);
275 }
276
277 #define XFS_BMBT_TRACE_ARGBI(c,b,i) \
278 xfs_bmbt_trace_argbi(__FUNCTION__, c, b, i, __LINE__)
279 #define XFS_BMBT_TRACE_ARGBII(c,b,i,j) \
280 xfs_bmbt_trace_argbii(__FUNCTION__, c, b, i, j, __LINE__)
281 #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j) \
282 xfs_bmbt_trace_argfffi(__FUNCTION__, c, o, b, i, j, __LINE__)
283 #define XFS_BMBT_TRACE_ARGI(c,i) \
284 xfs_bmbt_trace_argi(__FUNCTION__, c, i, __LINE__)
285 #define XFS_BMBT_TRACE_ARGIFK(c,i,f,s) \
286 xfs_bmbt_trace_argifk(__FUNCTION__, c, i, f, s, __LINE__)
287 #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r) \
288 xfs_bmbt_trace_argifr(__FUNCTION__, c, i, f, r, __LINE__)
289 #define XFS_BMBT_TRACE_ARGIK(c,i,k) \
290 xfs_bmbt_trace_argik(__FUNCTION__, c, i, k, __LINE__)
291 #define XFS_BMBT_TRACE_CURSOR(c,s) \
292 xfs_bmbt_trace_cursor(__FUNCTION__, c, s, __LINE__)
293 #else
294 #define XFS_BMBT_TRACE_ARGBI(c,b,i)
295 #define XFS_BMBT_TRACE_ARGBII(c,b,i,j)
296 #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)
297 #define XFS_BMBT_TRACE_ARGI(c,i)
298 #define XFS_BMBT_TRACE_ARGIFK(c,i,f,s)
299 #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r)
300 #define XFS_BMBT_TRACE_ARGIK(c,i,k)
301 #define XFS_BMBT_TRACE_CURSOR(c,s)
302 #endif /* XFS_BMBT_TRACE */
303
304
305 /*
306 * Internal functions.
307 */
308
309 /*
310 * Delete record pointed to by cur/level.
311 */
312 STATIC int /* error */
313 xfs_bmbt_delrec(
314 xfs_btree_cur_t *cur,
315 int level,
316 int *stat) /* success/failure */
317 {
318 xfs_bmbt_block_t *block; /* bmap btree block */
319 xfs_fsblock_t bno; /* fs-relative block number */
320 xfs_buf_t *bp; /* buffer for block */
321 int error; /* error return value */
322 int i; /* loop counter */
323 int j; /* temp state */
324 xfs_bmbt_key_t key; /* bmap btree key */
325 xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */
326 xfs_fsblock_t lbno; /* left sibling block number */
327 xfs_buf_t *lbp; /* left buffer pointer */
328 xfs_bmbt_block_t *left; /* left btree block */
329 xfs_bmbt_key_t *lkp; /* left btree key */
330 xfs_bmbt_ptr_t *lpp; /* left address pointer */
331 int lrecs=0; /* left record count */
332 xfs_bmbt_rec_t *lrp; /* left record pointer */
333 xfs_mount_t *mp; /* file system mount point */
334 xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
335 int ptr; /* key/record index */
336 xfs_fsblock_t rbno; /* right sibling block number */
337 xfs_buf_t *rbp; /* right buffer pointer */
338 xfs_bmbt_block_t *right; /* right btree block */
339 xfs_bmbt_key_t *rkp; /* right btree key */
340 xfs_bmbt_rec_t *rp; /* pointer to bmap btree rec */
341 xfs_bmbt_ptr_t *rpp; /* right address pointer */
342 xfs_bmbt_block_t *rrblock; /* right-right btree block */
343 xfs_buf_t *rrbp; /* right-right buffer pointer */
344 int rrecs=0; /* right record count */
345 xfs_bmbt_rec_t *rrp; /* right record pointer */
346 xfs_btree_cur_t *tcur; /* temporary btree cursor */
347 int numrecs; /* temporary numrec count */
348 int numlrecs, numrrecs;
349
350 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
351 XFS_BMBT_TRACE_ARGI(cur, level);
352 ptr = cur->bc_ptrs[level];
353 tcur = NULL;
354 if (ptr == 0) {
355 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
356 *stat = 0;
357 return 0;
358 }
359 block = xfs_bmbt_get_block(cur, level, &bp);
360 numrecs = be16_to_cpu(block->bb_numrecs);
361 #ifdef DEBUG
362 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
363 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
364 goto error0;
365 }
366 #endif
367 if (ptr > numrecs) {
368 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
369 *stat = 0;
370 return 0;
371 }
372 XFS_STATS_INC(xs_bmbt_delrec);
373 if (level > 0) {
374 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
375 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
376 #ifdef DEBUG
377 for (i = ptr; i < numrecs; i++) {
378 if ((error = xfs_btree_check_lptr_disk(cur, pp[i], level))) {
379 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
380 goto error0;
381 }
382 }
383 #endif
384 if (ptr < numrecs) {
385 memmove(&kp[ptr - 1], &kp[ptr],
386 (numrecs - ptr) * sizeof(*kp));
387 memmove(&pp[ptr - 1], &pp[ptr],
388 (numrecs - ptr) * sizeof(*pp));
389 xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1);
390 xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1);
391 }
392 } else {
393 rp = XFS_BMAP_REC_IADDR(block, 1, cur);
394 if (ptr < numrecs) {
395 memmove(&rp[ptr - 1], &rp[ptr],
396 (numrecs - ptr) * sizeof(*rp));
397 xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1);
398 }
399 if (ptr == 1) {
400 key.br_startoff =
401 cpu_to_be64(xfs_bmbt_disk_get_startoff(rp));
402 kp = &key;
403 }
404 }
405 numrecs--;
406 block->bb_numrecs = cpu_to_be16(numrecs);
407 xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
408 /*
409 * We're at the root level.
410 * First, shrink the root block in-memory.
411 * Try to get rid of the next level down.
412 * If we can't then there's nothing left to do.
413 */
414 if (level == cur->bc_nlevels - 1) {
415 xfs_iroot_realloc(cur->bc_private.b.ip, -1,
416 cur->bc_private.b.whichfork);
417 if ((error = xfs_bmbt_killroot(cur))) {
418 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
419 goto error0;
420 }
421 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
422 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
423 goto error0;
424 }
425 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
426 *stat = 1;
427 return 0;
428 }
429 if (ptr == 1 && (error = xfs_bmbt_updkey(cur, kp, level + 1))) {
430 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
431 goto error0;
432 }
433 if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
434 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
435 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
436 goto error0;
437 }
438 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
439 *stat = 1;
440 return 0;
441 }
442 rbno = be64_to_cpu(block->bb_rightsib);
443 lbno = be64_to_cpu(block->bb_leftsib);
444 /*
445 * One child of root, need to get a chance to copy its contents
446 * into the root and delete it. Can't go up to next level,
447 * there's nothing to delete there.
448 */
449 if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK &&
450 level == cur->bc_nlevels - 2) {
451 if ((error = xfs_bmbt_killroot(cur))) {
452 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
453 goto error0;
454 }
455 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
456 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
457 goto error0;
458 }
459 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
460 *stat = 1;
461 return 0;
462 }
463 ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK);
464 if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
465 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
466 goto error0;
467 }
468 bno = NULLFSBLOCK;
469 if (rbno != NULLFSBLOCK) {
470 i = xfs_btree_lastrec(tcur, level);
471 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
472 if ((error = xfs_bmbt_increment(tcur, level, &i))) {
473 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
474 goto error0;
475 }
476 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
477 i = xfs_btree_lastrec(tcur, level);
478 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
479 rbp = tcur->bc_bufs[level];
480 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
481 #ifdef DEBUG
482 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
483 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
484 goto error0;
485 }
486 #endif
487 bno = be64_to_cpu(right->bb_leftsib);
488 if (be16_to_cpu(right->bb_numrecs) - 1 >=
489 XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
490 if ((error = xfs_bmbt_lshift(tcur, level, &i))) {
491 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
492 goto error0;
493 }
494 if (i) {
495 ASSERT(be16_to_cpu(block->bb_numrecs) >=
496 XFS_BMAP_BLOCK_IMINRECS(level, tcur));
497 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
498 tcur = NULL;
499 if (level > 0) {
500 if ((error = xfs_bmbt_decrement(cur,
501 level, &i))) {
502 XFS_BMBT_TRACE_CURSOR(cur,
503 ERROR);
504 goto error0;
505 }
506 }
507 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
508 *stat = 1;
509 return 0;
510 }
511 }
512 rrecs = be16_to_cpu(right->bb_numrecs);
513 if (lbno != NULLFSBLOCK) {
514 i = xfs_btree_firstrec(tcur, level);
515 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
516 if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
517 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
518 goto error0;
519 }
520 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
521 }
522 }
523 if (lbno != NULLFSBLOCK) {
524 i = xfs_btree_firstrec(tcur, level);
525 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
526 /*
527 * decrement to last in block
528 */
529 if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
530 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
531 goto error0;
532 }
533 i = xfs_btree_firstrec(tcur, level);
534 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
535 lbp = tcur->bc_bufs[level];
536 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
537 #ifdef DEBUG
538 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
539 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
540 goto error0;
541 }
542 #endif
543 bno = be64_to_cpu(left->bb_rightsib);
544 if (be16_to_cpu(left->bb_numrecs) - 1 >=
545 XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
546 if ((error = xfs_bmbt_rshift(tcur, level, &i))) {
547 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
548 goto error0;
549 }
550 if (i) {
551 ASSERT(be16_to_cpu(block->bb_numrecs) >=
552 XFS_BMAP_BLOCK_IMINRECS(level, tcur));
553 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
554 tcur = NULL;
555 if (level == 0)
556 cur->bc_ptrs[0]++;
557 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
558 *stat = 1;
559 return 0;
560 }
561 }
562 lrecs = be16_to_cpu(left->bb_numrecs);
563 }
564 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
565 tcur = NULL;
566 mp = cur->bc_mp;
567 ASSERT(bno != NULLFSBLOCK);
568 if (lbno != NULLFSBLOCK &&
569 lrecs + be16_to_cpu(block->bb_numrecs) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
570 rbno = bno;
571 right = block;
572 rbp = bp;
573 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp,
574 XFS_BMAP_BTREE_REF))) {
575 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
576 goto error0;
577 }
578 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
579 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
580 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
581 goto error0;
582 }
583 } else if (rbno != NULLFSBLOCK &&
584 rrecs + be16_to_cpu(block->bb_numrecs) <=
585 XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
586 lbno = bno;
587 left = block;
588 lbp = bp;
589 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp,
590 XFS_BMAP_BTREE_REF))) {
591 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
592 goto error0;
593 }
594 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
595 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
596 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
597 goto error0;
598 }
599 lrecs = be16_to_cpu(left->bb_numrecs);
600 } else {
601 if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
602 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
603 goto error0;
604 }
605 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
606 *stat = 1;
607 return 0;
608 }
609 numlrecs = be16_to_cpu(left->bb_numrecs);
610 numrrecs = be16_to_cpu(right->bb_numrecs);
611 if (level > 0) {
612 lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur);
613 lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur);
614 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
615 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
616 #ifdef DEBUG
617 for (i = 0; i < numrrecs; i++) {
618 if ((error = xfs_btree_check_lptr_disk(cur, rpp[i], level))) {
619 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
620 goto error0;
621 }
622 }
623 #endif
624 memcpy(lkp, rkp, numrrecs * sizeof(*lkp));
625 memcpy(lpp, rpp, numrrecs * sizeof(*lpp));
626 xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
627 xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
628 } else {
629 lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur);
630 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
631 memcpy(lrp, rrp, numrrecs * sizeof(*lrp));
632 xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
633 }
634 be16_add(&left->bb_numrecs, numrrecs);
635 left->bb_rightsib = right->bb_rightsib;
636 xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS);
637 if (be64_to_cpu(left->bb_rightsib) != NULLDFSBNO) {
638 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp,
639 be64_to_cpu(left->bb_rightsib),
640 0, &rrbp, XFS_BMAP_BTREE_REF))) {
641 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
642 goto error0;
643 }
644 rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
645 if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
646 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
647 goto error0;
648 }
649 rrblock->bb_leftsib = cpu_to_be64(lbno);
650 xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
651 }
652 xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1,
653 cur->bc_private.b.flist, mp);
654 cur->bc_private.b.ip->i_d.di_nblocks--;
655 xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
656 XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip,
657 XFS_TRANS_DQ_BCOUNT, -1L);
658 xfs_trans_binval(cur->bc_tp, rbp);
659 if (bp != lbp) {
660 cur->bc_bufs[level] = lbp;
661 cur->bc_ptrs[level] += lrecs;
662 cur->bc_ra[level] = 0;
663 } else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) {
664 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
665 goto error0;
666 }
667 if (level > 0)
668 cur->bc_ptrs[level]--;
669 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
670 *stat = 2;
671 return 0;
672
673 error0:
674 if (tcur)
675 xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
676 return error;
677 }
678
679 /*
680 * Insert one record/level. Return information to the caller
681 * allowing the next level up to proceed if necessary.
682 */
683 STATIC int /* error */
684 xfs_bmbt_insrec(
685 xfs_btree_cur_t *cur,
686 int level,
687 xfs_fsblock_t *bnop,
688 xfs_bmbt_rec_t *recp,
689 xfs_btree_cur_t **curp,
690 int *stat) /* no-go/done/continue */
691 {
692 xfs_bmbt_block_t *block; /* bmap btree block */
693 xfs_buf_t *bp; /* buffer for block */
694 int error; /* error return value */
695 int i; /* loop index */
696 xfs_bmbt_key_t key; /* bmap btree key */
697 xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */
698 int logflags; /* inode logging flags */
699 xfs_fsblock_t nbno; /* new block number */
700 struct xfs_btree_cur *ncur; /* new btree cursor */
701 __uint64_t startoff; /* new btree key value */
702 xfs_bmbt_rec_t nrec; /* new record count */
703 int optr; /* old key/record index */
704 xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
705 int ptr; /* key/record index */
706 xfs_bmbt_rec_t *rp=NULL; /* pointer to bmap btree rec */
707 int numrecs;
708
709 ASSERT(level < cur->bc_nlevels);
710 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
711 XFS_BMBT_TRACE_ARGIFR(cur, level, *bnop, recp);
712 ncur = NULL;
713 key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(recp));
714 optr = ptr = cur->bc_ptrs[level];
715 if (ptr == 0) {
716 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
717 *stat = 0;
718 return 0;
719 }
720 XFS_STATS_INC(xs_bmbt_insrec);
721 block = xfs_bmbt_get_block(cur, level, &bp);
722 numrecs = be16_to_cpu(block->bb_numrecs);
723 #ifdef DEBUG
724 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
725 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
726 return error;
727 }
728 if (ptr <= numrecs) {
729 if (level == 0) {
730 rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
731 xfs_btree_check_rec(XFS_BTNUM_BMAP, recp, rp);
732 } else {
733 kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
734 xfs_btree_check_key(XFS_BTNUM_BMAP, &key, kp);
735 }
736 }
737 #endif
738 nbno = NULLFSBLOCK;
739 if (numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
740 if (numrecs < XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
741 /*
742 * A root block, that can be made bigger.
743 */
744 xfs_iroot_realloc(cur->bc_private.b.ip, 1,
745 cur->bc_private.b.whichfork);
746 block = xfs_bmbt_get_block(cur, level, &bp);
747 } else if (level == cur->bc_nlevels - 1) {
748 if ((error = xfs_bmbt_newroot(cur, &logflags, stat)) ||
749 *stat == 0) {
750 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
751 return error;
752 }
753 xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
754 logflags);
755 block = xfs_bmbt_get_block(cur, level, &bp);
756 } else {
757 if ((error = xfs_bmbt_rshift(cur, level, &i))) {
758 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
759 return error;
760 }
761 if (i) {
762 /* nothing */
763 } else {
764 if ((error = xfs_bmbt_lshift(cur, level, &i))) {
765 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
766 return error;
767 }
768 if (i) {
769 optr = ptr = cur->bc_ptrs[level];
770 } else {
771 if ((error = xfs_bmbt_split(cur, level,
772 &nbno, &startoff, &ncur,
773 &i))) {
774 XFS_BMBT_TRACE_CURSOR(cur,
775 ERROR);
776 return error;
777 }
778 if (i) {
779 block = xfs_bmbt_get_block(
780 cur, level, &bp);
781 #ifdef DEBUG
782 if ((error =
783 xfs_btree_check_lblock(cur,
784 block, level, bp))) {
785 XFS_BMBT_TRACE_CURSOR(
786 cur, ERROR);
787 return error;
788 }
789 #endif
790 ptr = cur->bc_ptrs[level];
791 xfs_bmbt_disk_set_allf(&nrec,
792 startoff, 0, 0,
793 XFS_EXT_NORM);
794 } else {
795 XFS_BMBT_TRACE_CURSOR(cur,
796 EXIT);
797 *stat = 0;
798 return 0;
799 }
800 }
801 }
802 }
803 }
804 numrecs = be16_to_cpu(block->bb_numrecs);
805 if (level > 0) {
806 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
807 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
808 #ifdef DEBUG
809 for (i = numrecs; i >= ptr; i--) {
810 if ((error = xfs_btree_check_lptr_disk(cur, pp[i - 1],
811 level))) {
812 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
813 return error;
814 }
815 }
816 #endif
817 memmove(&kp[ptr], &kp[ptr - 1],
818 (numrecs - ptr + 1) * sizeof(*kp));
819 memmove(&pp[ptr], &pp[ptr - 1],
820 (numrecs - ptr + 1) * sizeof(*pp));
821 #ifdef DEBUG
822 if ((error = xfs_btree_check_lptr(cur, *bnop, level))) {
823 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
824 return error;
825 }
826 #endif
827 kp[ptr - 1] = key;
828 pp[ptr - 1] = cpu_to_be64(*bnop);
829 numrecs++;
830 block->bb_numrecs = cpu_to_be16(numrecs);
831 xfs_bmbt_log_keys(cur, bp, ptr, numrecs);
832 xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs);
833 } else {
834 rp = XFS_BMAP_REC_IADDR(block, 1, cur);
835 memmove(&rp[ptr], &rp[ptr - 1],
836 (numrecs - ptr + 1) * sizeof(*rp));
837 rp[ptr - 1] = *recp;
838 numrecs++;
839 block->bb_numrecs = cpu_to_be16(numrecs);
840 xfs_bmbt_log_recs(cur, bp, ptr, numrecs);
841 }
842 xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
843 #ifdef DEBUG
844 if (ptr < numrecs) {
845 if (level == 0)
846 xfs_btree_check_rec(XFS_BTNUM_BMAP, rp + ptr - 1,
847 rp + ptr);
848 else
849 xfs_btree_check_key(XFS_BTNUM_BMAP, kp + ptr - 1,
850 kp + ptr);
851 }
852 #endif
853 if (optr == 1 && (error = xfs_bmbt_updkey(cur, &key, level + 1))) {
854 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
855 return error;
856 }
857 *bnop = nbno;
858 if (nbno != NULLFSBLOCK) {
859 *recp = nrec;
860 *curp = ncur;
861 }
862 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
863 *stat = 1;
864 return 0;
865 }
866
867 STATIC int
868 xfs_bmbt_killroot(
869 xfs_btree_cur_t *cur)
870 {
871 xfs_bmbt_block_t *block;
872 xfs_bmbt_block_t *cblock;
873 xfs_buf_t *cbp;
874 xfs_bmbt_key_t *ckp;
875 xfs_bmbt_ptr_t *cpp;
876 #ifdef DEBUG
877 int error;
878 #endif
879 int i;
880 xfs_bmbt_key_t *kp;
881 xfs_inode_t *ip;
882 xfs_ifork_t *ifp;
883 int level;
884 xfs_bmbt_ptr_t *pp;
885
886 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
887 level = cur->bc_nlevels - 1;
888 ASSERT(level >= 1);
889 /*
890 * Don't deal with the root block needs to be a leaf case.
891 * We're just going to turn the thing back into extents anyway.
892 */
893 if (level == 1) {
894 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
895 return 0;
896 }
897 block = xfs_bmbt_get_block(cur, level, &cbp);
898 /*
899 * Give up if the root has multiple children.
900 */
901 if (be16_to_cpu(block->bb_numrecs) != 1) {
902 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
903 return 0;
904 }
905 /*
906 * Only do this if the next level will fit.
907 * Then the data must be copied up to the inode,
908 * instead of freeing the root you free the next level.
909 */
910 cbp = cur->bc_bufs[level - 1];
911 cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
912 if (be16_to_cpu(cblock->bb_numrecs) > XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
913 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
914 return 0;
915 }
916 ASSERT(be64_to_cpu(cblock->bb_leftsib) == NULLDFSBNO);
917 ASSERT(be64_to_cpu(cblock->bb_rightsib) == NULLDFSBNO);
918 ip = cur->bc_private.b.ip;
919 ifp = XFS_IFORK_PTR(ip, cur->bc_private.b.whichfork);
920 ASSERT(XFS_BMAP_BLOCK_IMAXRECS(level, cur) ==
921 XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes));
922 i = (int)(be16_to_cpu(cblock->bb_numrecs) - XFS_BMAP_BLOCK_IMAXRECS(level, cur));
923 if (i) {
924 xfs_iroot_realloc(ip, i, cur->bc_private.b.whichfork);
925 block = ifp->if_broot;
926 }
927 be16_add(&block->bb_numrecs, i);
928 ASSERT(block->bb_numrecs == cblock->bb_numrecs);
929 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
930 ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
931 memcpy(kp, ckp, be16_to_cpu(block->bb_numrecs) * sizeof(*kp));
932 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
933 cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
934 #ifdef DEBUG
935 for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
936 if ((error = xfs_btree_check_lptr_disk(cur, cpp[i], level - 1))) {
937 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
938 return error;
939 }
940 }
941 #endif
942 memcpy(pp, cpp, be16_to_cpu(block->bb_numrecs) * sizeof(*pp));
943 xfs_bmap_add_free(XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(cbp)), 1,
944 cur->bc_private.b.flist, cur->bc_mp);
945 ip->i_d.di_nblocks--;
946 XFS_TRANS_MOD_DQUOT_BYINO(cur->bc_mp, cur->bc_tp, ip,
947 XFS_TRANS_DQ_BCOUNT, -1L);
948 xfs_trans_binval(cur->bc_tp, cbp);
949 cur->bc_bufs[level - 1] = NULL;
950 be16_add(&block->bb_level, -1);
951 xfs_trans_log_inode(cur->bc_tp, ip,
952 XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
953 cur->bc_nlevels--;
954 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
955 return 0;
956 }
957
958 /*
959 * Log key values from the btree block.
960 */
961 STATIC void
962 xfs_bmbt_log_keys(
963 xfs_btree_cur_t *cur,
964 xfs_buf_t *bp,
965 int kfirst,
966 int klast)
967 {
968 xfs_trans_t *tp;
969
970 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
971 XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast);
972 tp = cur->bc_tp;
973 if (bp) {
974 xfs_bmbt_block_t *block;
975 int first;
976 xfs_bmbt_key_t *kp;
977 int last;
978
979 block = XFS_BUF_TO_BMBT_BLOCK(bp);
980 kp = XFS_BMAP_KEY_DADDR(block, 1, cur);
981 first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block);
982 last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block);
983 xfs_trans_log_buf(tp, bp, first, last);
984 } else {
985 xfs_inode_t *ip;
986
987 ip = cur->bc_private.b.ip;
988 xfs_trans_log_inode(tp, ip,
989 XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
990 }
991 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
992 }
993
994 /*
995 * Log pointer values from the btree block.
996 */
997 STATIC void
998 xfs_bmbt_log_ptrs(
999 xfs_btree_cur_t *cur,
1000 xfs_buf_t *bp,
1001 int pfirst,
1002 int plast)
1003 {
1004 xfs_trans_t *tp;
1005
1006 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1007 XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast);
1008 tp = cur->bc_tp;
1009 if (bp) {
1010 xfs_bmbt_block_t *block;
1011 int first;
1012 int last;
1013 xfs_bmbt_ptr_t *pp;
1014
1015 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1016 pp = XFS_BMAP_PTR_DADDR(block, 1, cur);
1017 first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block);
1018 last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block);
1019 xfs_trans_log_buf(tp, bp, first, last);
1020 } else {
1021 xfs_inode_t *ip;
1022
1023 ip = cur->bc_private.b.ip;
1024 xfs_trans_log_inode(tp, ip,
1025 XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
1026 }
1027 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1028 }
1029
1030 /*
1031 * Lookup the record. The cursor is made to point to it, based on dir.
1032 */
1033 STATIC int /* error */
1034 xfs_bmbt_lookup(
1035 xfs_btree_cur_t *cur,
1036 xfs_lookup_t dir,
1037 int *stat) /* success/failure */
1038 {
1039 xfs_bmbt_block_t *block=NULL;
1040 xfs_buf_t *bp;
1041 xfs_daddr_t d;
1042 xfs_sfiloff_t diff;
1043 int error; /* error return value */
1044 xfs_fsblock_t fsbno=0;
1045 int high;
1046 int i;
1047 int keyno=0;
1048 xfs_bmbt_key_t *kkbase=NULL;
1049 xfs_bmbt_key_t *kkp;
1050 xfs_bmbt_rec_t *krbase=NULL;
1051 xfs_bmbt_rec_t *krp;
1052 int level;
1053 int low;
1054 xfs_mount_t *mp;
1055 xfs_bmbt_ptr_t *pp;
1056 xfs_bmbt_irec_t *rp;
1057 xfs_fileoff_t startoff;
1058 xfs_trans_t *tp;
1059
1060 XFS_STATS_INC(xs_bmbt_lookup);
1061 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1062 XFS_BMBT_TRACE_ARGI(cur, (int)dir);
1063 tp = cur->bc_tp;
1064 mp = cur->bc_mp;
1065 rp = &cur->bc_rec.b;
1066 for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
1067 if (level < cur->bc_nlevels - 1) {
1068 d = XFS_FSB_TO_DADDR(mp, fsbno);
1069 bp = cur->bc_bufs[level];
1070 if (bp && XFS_BUF_ADDR(bp) != d)
1071 bp = NULL;
1072 if (!bp) {
1073 if ((error = xfs_btree_read_bufl(mp, tp, fsbno,
1074 0, &bp, XFS_BMAP_BTREE_REF))) {
1075 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1076 return error;
1077 }
1078 xfs_btree_setbuf(cur, level, bp);
1079 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1080 if ((error = xfs_btree_check_lblock(cur, block,
1081 level, bp))) {
1082 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1083 return error;
1084 }
1085 } else
1086 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1087 } else
1088 block = xfs_bmbt_get_block(cur, level, &bp);
1089 if (diff == 0)
1090 keyno = 1;
1091 else {
1092 if (level > 0)
1093 kkbase = XFS_BMAP_KEY_IADDR(block, 1, cur);
1094 else
1095 krbase = XFS_BMAP_REC_IADDR(block, 1, cur);
1096 low = 1;
1097 if (!(high = be16_to_cpu(block->bb_numrecs))) {
1098 ASSERT(level == 0);
1099 cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
1100 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1101 *stat = 0;
1102 return 0;
1103 }
1104 while (low <= high) {
1105 XFS_STATS_INC(xs_bmbt_compare);
1106 keyno = (low + high) >> 1;
1107 if (level > 0) {
1108 kkp = kkbase + keyno - 1;
1109 startoff = be64_to_cpu(kkp->br_startoff);
1110 } else {
1111 krp = krbase + keyno - 1;
1112 startoff = xfs_bmbt_disk_get_startoff(krp);
1113 }
1114 diff = (xfs_sfiloff_t)
1115 (startoff - rp->br_startoff);
1116 if (diff < 0)
1117 low = keyno + 1;
1118 else if (diff > 0)
1119 high = keyno - 1;
1120 else
1121 break;
1122 }
1123 }
1124 if (level > 0) {
1125 if (diff > 0 && --keyno < 1)
1126 keyno = 1;
1127 pp = XFS_BMAP_PTR_IADDR(block, keyno, cur);
1128 fsbno = be64_to_cpu(*pp);
1129 #ifdef DEBUG
1130 if ((error = xfs_btree_check_lptr(cur, fsbno, level))) {
1131 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1132 return error;
1133 }
1134 #endif
1135 cur->bc_ptrs[level] = keyno;
1136 }
1137 }
1138 if (dir != XFS_LOOKUP_LE && diff < 0) {
1139 keyno++;
1140 /*
1141 * If ge search and we went off the end of the block, but it's
1142 * not the last block, we're in the wrong block.
1143 */
1144 if (dir == XFS_LOOKUP_GE && keyno > be16_to_cpu(block->bb_numrecs) &&
1145 be64_to_cpu(block->bb_rightsib) != NULLDFSBNO) {
1146 cur->bc_ptrs[0] = keyno;
1147 if ((error = xfs_bmbt_increment(cur, 0, &i))) {
1148 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1149 return error;
1150 }
1151 XFS_WANT_CORRUPTED_RETURN(i == 1);
1152 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1153 *stat = 1;
1154 return 0;
1155 }
1156 }
1157 else if (dir == XFS_LOOKUP_LE && diff > 0)
1158 keyno--;
1159 cur->bc_ptrs[0] = keyno;
1160 if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs)) {
1161 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1162 *stat = 0;
1163 } else {
1164 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1165 *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0));
1166 }
1167 return 0;
1168 }
1169
1170 /*
1171 * Move 1 record left from cur/level if possible.
1172 * Update cur to reflect the new path.
1173 */
1174 STATIC int /* error */
1175 xfs_bmbt_lshift(
1176 xfs_btree_cur_t *cur,
1177 int level,
1178 int *stat) /* success/failure */
1179 {
1180 int error; /* error return value */
1181 #ifdef DEBUG
1182 int i; /* loop counter */
1183 #endif
1184 xfs_bmbt_key_t key; /* bmap btree key */
1185 xfs_buf_t *lbp; /* left buffer pointer */
1186 xfs_bmbt_block_t *left; /* left btree block */
1187 xfs_bmbt_key_t *lkp=NULL; /* left btree key */
1188 xfs_bmbt_ptr_t *lpp; /* left address pointer */
1189 int lrecs; /* left record count */
1190 xfs_bmbt_rec_t *lrp=NULL; /* left record pointer */
1191 xfs_mount_t *mp; /* file system mount point */
1192 xfs_buf_t *rbp; /* right buffer pointer */
1193 xfs_bmbt_block_t *right; /* right btree block */
1194 xfs_bmbt_key_t *rkp=NULL; /* right btree key */
1195 xfs_bmbt_ptr_t *rpp=NULL; /* right address pointer */
1196 xfs_bmbt_rec_t *rrp=NULL; /* right record pointer */
1197 int rrecs; /* right record count */
1198
1199 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1200 XFS_BMBT_TRACE_ARGI(cur, level);
1201 if (level == cur->bc_nlevels - 1) {
1202 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1203 *stat = 0;
1204 return 0;
1205 }
1206 rbp = cur->bc_bufs[level];
1207 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1208 #ifdef DEBUG
1209 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
1210 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1211 return error;
1212 }
1213 #endif
1214 if (be64_to_cpu(right->bb_leftsib) == NULLDFSBNO) {
1215 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1216 *stat = 0;
1217 return 0;
1218 }
1219 if (cur->bc_ptrs[level] <= 1) {
1220 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1221 *stat = 0;
1222 return 0;
1223 }
1224 mp = cur->bc_mp;
1225 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, be64_to_cpu(right->bb_leftsib), 0,
1226 &lbp, XFS_BMAP_BTREE_REF))) {
1227 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1228 return error;
1229 }
1230 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1231 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
1232 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1233 return error;
1234 }
1235 if (be16_to_cpu(left->bb_numrecs) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
1236 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1237 *stat = 0;
1238 return 0;
1239 }
1240 lrecs = be16_to_cpu(left->bb_numrecs) + 1;
1241 if (level > 0) {
1242 lkp = XFS_BMAP_KEY_IADDR(left, lrecs, cur);
1243 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1244 *lkp = *rkp;
1245 xfs_bmbt_log_keys(cur, lbp, lrecs, lrecs);
1246 lpp = XFS_BMAP_PTR_IADDR(left, lrecs, cur);
1247 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1248 #ifdef DEBUG
1249 if ((error = xfs_btree_check_lptr_disk(cur, *rpp, level))) {
1250 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1251 return error;
1252 }
1253 #endif
1254 *lpp = *rpp;
1255 xfs_bmbt_log_ptrs(cur, lbp, lrecs, lrecs);
1256 } else {
1257 lrp = XFS_BMAP_REC_IADDR(left, lrecs, cur);
1258 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1259 *lrp = *rrp;
1260 xfs_bmbt_log_recs(cur, lbp, lrecs, lrecs);
1261 }
1262 left->bb_numrecs = cpu_to_be16(lrecs);
1263 xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
1264 #ifdef DEBUG
1265 if (level > 0)
1266 xfs_btree_check_key(XFS_BTNUM_BMAP, lkp - 1, lkp);
1267 else
1268 xfs_btree_check_rec(XFS_BTNUM_BMAP, lrp - 1, lrp);
1269 #endif
1270 rrecs = be16_to_cpu(right->bb_numrecs) - 1;
1271 right->bb_numrecs = cpu_to_be16(rrecs);
1272 xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
1273 if (level > 0) {
1274 #ifdef DEBUG
1275 for (i = 0; i < rrecs; i++) {
1276 if ((error = xfs_btree_check_lptr_disk(cur, rpp[i + 1],
1277 level))) {
1278 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1279 return error;
1280 }
1281 }
1282 #endif
1283 memmove(rkp, rkp + 1, rrecs * sizeof(*rkp));
1284 memmove(rpp, rpp + 1, rrecs * sizeof(*rpp));
1285 xfs_bmbt_log_keys(cur, rbp, 1, rrecs);
1286 xfs_bmbt_log_ptrs(cur, rbp, 1, rrecs);
1287 } else {
1288 memmove(rrp, rrp + 1, rrecs * sizeof(*rrp));
1289 xfs_bmbt_log_recs(cur, rbp, 1, rrecs);
1290 key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(rrp));
1291 rkp = &key;
1292 }
1293 if ((error = xfs_bmbt_updkey(cur, rkp, level + 1))) {
1294 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1295 return error;
1296 }
1297 cur->bc_ptrs[level]--;
1298 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1299 *stat = 1;
1300 return 0;
1301 }
1302
1303 /*
1304 * Move 1 record right from cur/level if possible.
1305 * Update cur to reflect the new path.
1306 */
1307 STATIC int /* error */
1308 xfs_bmbt_rshift(
1309 xfs_btree_cur_t *cur,
1310 int level,
1311 int *stat) /* success/failure */
1312 {
1313 int error; /* error return value */
1314 int i; /* loop counter */
1315 xfs_bmbt_key_t key; /* bmap btree key */
1316 xfs_buf_t *lbp; /* left buffer pointer */
1317 xfs_bmbt_block_t *left; /* left btree block */
1318 xfs_bmbt_key_t *lkp; /* left btree key */
1319 xfs_bmbt_ptr_t *lpp; /* left address pointer */
1320 xfs_bmbt_rec_t *lrp; /* left record pointer */
1321 xfs_mount_t *mp; /* file system mount point */
1322 xfs_buf_t *rbp; /* right buffer pointer */
1323 xfs_bmbt_block_t *right; /* right btree block */
1324 xfs_bmbt_key_t *rkp; /* right btree key */
1325 xfs_bmbt_ptr_t *rpp; /* right address pointer */
1326 xfs_bmbt_rec_t *rrp=NULL; /* right record pointer */
1327 struct xfs_btree_cur *tcur; /* temporary btree cursor */
1328
1329 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1330 XFS_BMBT_TRACE_ARGI(cur, level);
1331 if (level == cur->bc_nlevels - 1) {
1332 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1333 *stat = 0;
1334 return 0;
1335 }
1336 lbp = cur->bc_bufs[level];
1337 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1338 #ifdef DEBUG
1339 if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
1340 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1341 return error;
1342 }
1343 #endif
1344 if (be64_to_cpu(left->bb_rightsib) == NULLDFSBNO) {
1345 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1346 *stat = 0;
1347 return 0;
1348 }
1349 if (cur->bc_ptrs[level] >= be16_to_cpu(left->bb_numrecs)) {
1350 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1351 *stat = 0;
1352 return 0;
1353 }
1354 mp = cur->bc_mp;
1355 if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, be64_to_cpu(left->bb_rightsib), 0,
1356 &rbp, XFS_BMAP_BTREE_REF))) {
1357 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1358 return error;
1359 }
1360 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1361 if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
1362 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1363 return error;
1364 }
1365 if (be16_to_cpu(right->bb_numrecs) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
1366 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1367 *stat = 0;
1368 return 0;
1369 }
1370 if (level > 0) {
1371 lkp = XFS_BMAP_KEY_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
1372 lpp = XFS_BMAP_PTR_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
1373 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1374 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1375 #ifdef DEBUG
1376 for (i = be16_to_cpu(right->bb_numrecs) - 1; i >= 0; i--) {
1377 if ((error = xfs_btree_check_lptr_disk(cur, rpp[i], level))) {
1378 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1379 return error;
1380 }
1381 }
1382 #endif
1383 memmove(rkp + 1, rkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
1384 memmove(rpp + 1, rpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
1385 #ifdef DEBUG
1386 if ((error = xfs_btree_check_lptr_disk(cur, *lpp, level))) {
1387 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1388 return error;
1389 }
1390 #endif
1391 *rkp = *lkp;
1392 *rpp = *lpp;
1393 xfs_bmbt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
1394 xfs_bmbt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
1395 } else {
1396 lrp = XFS_BMAP_REC_IADDR(left, be16_to_cpu(left->bb_numrecs), cur);
1397 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1398 memmove(rrp + 1, rrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
1399 *rrp = *lrp;
1400 xfs_bmbt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
1401 key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(rrp));
1402 rkp = &key;
1403 }
1404 be16_add(&left->bb_numrecs, -1);
1405 xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
1406 be16_add(&right->bb_numrecs, 1);
1407 #ifdef DEBUG
1408 if (level > 0)
1409 xfs_btree_check_key(XFS_BTNUM_BMAP, rkp, rkp + 1);
1410 else
1411 xfs_btree_check_rec(XFS_BTNUM_BMAP, rrp, rrp + 1);
1412 #endif
1413 xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
1414 if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
1415 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1416 return error;
1417 }
1418 i = xfs_btree_lastrec(tcur, level);
1419 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
1420 if ((error = xfs_bmbt_increment(tcur, level, &i))) {
1421 XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
1422 goto error1;
1423 }
1424 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
1425 if ((error = xfs_bmbt_updkey(tcur, rkp, level + 1))) {
1426 XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
1427 goto error1;
1428 }
1429 xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
1430 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1431 *stat = 1;
1432 return 0;
1433 error0:
1434 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1435 error1:
1436 xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
1437 return error;
1438 }
1439
1440 /*
1441 * Determine the extent state.
1442 */
1443 /* ARGSUSED */
1444 STATIC xfs_exntst_t
1445 xfs_extent_state(
1446 xfs_filblks_t blks,
1447 int extent_flag)
1448 {
1449 if (extent_flag) {
1450 ASSERT(blks != 0); /* saved for DMIG */
1451 return XFS_EXT_UNWRITTEN;
1452 }
1453 return XFS_EXT_NORM;
1454 }
1455
1456
1457 /*
1458 * Split cur/level block in half.
1459 * Return new block number and its first record (to be inserted into parent).
1460 */
1461 STATIC int /* error */
1462 xfs_bmbt_split(
1463 xfs_btree_cur_t *cur,
1464 int level,
1465 xfs_fsblock_t *bnop,
1466 __uint64_t *startoff,
1467 xfs_btree_cur_t **curp,
1468 int *stat) /* success/failure */
1469 {
1470 xfs_alloc_arg_t args; /* block allocation args */
1471 int error; /* error return value */
1472 int i; /* loop counter */
1473 xfs_fsblock_t lbno; /* left sibling block number */
1474 xfs_buf_t *lbp; /* left buffer pointer */
1475 xfs_bmbt_block_t *left; /* left btree block */
1476 xfs_bmbt_key_t *lkp; /* left btree key */
1477 xfs_bmbt_ptr_t *lpp; /* left address pointer */
1478 xfs_bmbt_rec_t *lrp; /* left record pointer */
1479 xfs_buf_t *rbp; /* right buffer pointer */
1480 xfs_bmbt_block_t *right; /* right btree block */
1481 xfs_bmbt_key_t *rkp; /* right btree key */
1482 xfs_bmbt_ptr_t *rpp; /* right address pointer */
1483 xfs_bmbt_block_t *rrblock; /* right-right btree block */
1484 xfs_buf_t *rrbp; /* right-right buffer pointer */
1485 xfs_bmbt_rec_t *rrp; /* right record pointer */
1486
1487 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1488 XFS_BMBT_TRACE_ARGIFK(cur, level, *bnop, *startoff);
1489 args.tp = cur->bc_tp;
1490 args.mp = cur->bc_mp;
1491 lbp = cur->bc_bufs[level];
1492 lbno = XFS_DADDR_TO_FSB(args.mp, XFS_BUF_ADDR(lbp));
1493 left = XFS_BUF_TO_BMBT_BLOCK(lbp);
1494 args.fsbno = cur->bc_private.b.firstblock;
1495 args.firstblock = args.fsbno;
1496 if (args.fsbno == NULLFSBLOCK) {
1497 args.fsbno = lbno;
1498 args.type = XFS_ALLOCTYPE_START_BNO;
1499 } else
1500 args.type = XFS_ALLOCTYPE_NEAR_BNO;
1501 args.mod = args.minleft = args.alignment = args.total = args.isfl =
1502 args.userdata = args.minalignslop = 0;
1503 args.minlen = args.maxlen = args.prod = 1;
1504 args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
1505 if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
1506 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1507 return XFS_ERROR(ENOSPC);
1508 }
1509 if ((error = xfs_alloc_vextent(&args))) {
1510 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1511 return error;
1512 }
1513 if (args.fsbno == NULLFSBLOCK) {
1514 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1515 *stat = 0;
1516 return 0;
1517 }
1518 ASSERT(args.len == 1);
1519 cur->bc_private.b.firstblock = args.fsbno;
1520 cur->bc_private.b.allocated++;
1521 cur->bc_private.b.ip->i_d.di_nblocks++;
1522 xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
1523 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
1524 XFS_TRANS_DQ_BCOUNT, 1L);
1525 rbp = xfs_btree_get_bufl(args.mp, args.tp, args.fsbno, 0);
1526 right = XFS_BUF_TO_BMBT_BLOCK(rbp);
1527 #ifdef DEBUG
1528 if ((error = xfs_btree_check_lblock(cur, left, level, rbp))) {
1529 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1530 return error;
1531 }
1532 #endif
1533 right->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
1534 right->bb_level = left->bb_level;
1535 right->bb_numrecs = cpu_to_be16(be16_to_cpu(left->bb_numrecs) / 2);
1536 if ((be16_to_cpu(left->bb_numrecs) & 1) &&
1537 cur->bc_ptrs[level] <= be16_to_cpu(right->bb_numrecs) + 1)
1538 be16_add(&right->bb_numrecs, 1);
1539 i = be16_to_cpu(left->bb_numrecs) - be16_to_cpu(right->bb_numrecs) + 1;
1540 if (level > 0) {
1541 lkp = XFS_BMAP_KEY_IADDR(left, i, cur);
1542 lpp = XFS_BMAP_PTR_IADDR(left, i, cur);
1543 rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
1544 rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
1545 #ifdef DEBUG
1546 for (i = 0; i < be16_to_cpu(right->bb_numrecs); i++) {
1547 if ((error = xfs_btree_check_lptr_disk(cur, lpp[i], level))) {
1548 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1549 return error;
1550 }
1551 }
1552 #endif
1553 memcpy(rkp, lkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
1554 memcpy(rpp, lpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
1555 xfs_bmbt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
1556 xfs_bmbt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
1557 *startoff = be64_to_cpu(rkp->br_startoff);
1558 } else {
1559 lrp = XFS_BMAP_REC_IADDR(left, i, cur);
1560 rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
1561 memcpy(rrp, lrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
1562 xfs_bmbt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
1563 *startoff = xfs_bmbt_disk_get_startoff(rrp);
1564 }
1565 be16_add(&left->bb_numrecs, -(be16_to_cpu(right->bb_numrecs)));
1566 right->bb_rightsib = left->bb_rightsib;
1567 left->bb_rightsib = cpu_to_be64(args.fsbno);
1568 right->bb_leftsib = cpu_to_be64(lbno);
1569 xfs_bmbt_log_block(cur, rbp, XFS_BB_ALL_BITS);
1570 xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
1571 if (be64_to_cpu(right->bb_rightsib) != NULLDFSBNO) {
1572 if ((error = xfs_btree_read_bufl(args.mp, args.tp,
1573 be64_to_cpu(right->bb_rightsib), 0, &rrbp,
1574 XFS_BMAP_BTREE_REF))) {
1575 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1576 return error;
1577 }
1578 rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
1579 if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
1580 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1581 return error;
1582 }
1583 rrblock->bb_leftsib = cpu_to_be64(args.fsbno);
1584 xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
1585 }
1586 if (cur->bc_ptrs[level] > be16_to_cpu(left->bb_numrecs) + 1) {
1587 xfs_btree_setbuf(cur, level, rbp);
1588 cur->bc_ptrs[level] -= be16_to_cpu(left->bb_numrecs);
1589 }
1590 if (level + 1 < cur->bc_nlevels) {
1591 if ((error = xfs_btree_dup_cursor(cur, curp))) {
1592 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1593 return error;
1594 }
1595 (*curp)->bc_ptrs[level + 1]++;
1596 }
1597 *bnop = args.fsbno;
1598 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1599 *stat = 1;
1600 return 0;
1601 }
1602
1603
1604 /*
1605 * Update keys for the record.
1606 */
1607 STATIC int
1608 xfs_bmbt_updkey(
1609 xfs_btree_cur_t *cur,
1610 xfs_bmbt_key_t *keyp, /* on-disk format */
1611 int level)
1612 {
1613 xfs_bmbt_block_t *block;
1614 xfs_buf_t *bp;
1615 #ifdef DEBUG
1616 int error;
1617 #endif
1618 xfs_bmbt_key_t *kp;
1619 int ptr;
1620
1621 ASSERT(level >= 1);
1622 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1623 XFS_BMBT_TRACE_ARGIK(cur, level, keyp);
1624 for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
1625 block = xfs_bmbt_get_block(cur, level, &bp);
1626 #ifdef DEBUG
1627 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1628 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1629 return error;
1630 }
1631 #endif
1632 ptr = cur->bc_ptrs[level];
1633 kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
1634 *kp = *keyp;
1635 xfs_bmbt_log_keys(cur, bp, ptr, ptr);
1636 }
1637 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1638 return 0;
1639 }
1640
1641 /*
1642 * Convert on-disk form of btree root to in-memory form.
1643 */
1644 void
1645 xfs_bmdr_to_bmbt(
1646 xfs_bmdr_block_t *dblock,
1647 int dblocklen,
1648 xfs_bmbt_block_t *rblock,
1649 int rblocklen)
1650 {
1651 int dmxr;
1652 xfs_bmbt_key_t *fkp;
1653 __be64 *fpp;
1654 xfs_bmbt_key_t *tkp;
1655 __be64 *tpp;
1656
1657 rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
1658 rblock->bb_level = dblock->bb_level;
1659 ASSERT(be16_to_cpu(rblock->bb_level) > 0);
1660 rblock->bb_numrecs = dblock->bb_numrecs;
1661 rblock->bb_leftsib = cpu_to_be64(NULLDFSBNO);
1662 rblock->bb_rightsib = cpu_to_be64(NULLDFSBNO);
1663 dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
1664 fkp = XFS_BTREE_KEY_ADDR(xfs_bmdr, dblock, 1);
1665 tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
1666 fpp = XFS_BTREE_PTR_ADDR(xfs_bmdr, dblock, 1, dmxr);
1667 tpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
1668 dmxr = be16_to_cpu(dblock->bb_numrecs);
1669 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
1670 memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
1671 }
1672
1673 /*
1674 * Decrement cursor by one record at the level.
1675 * For nonzero levels the leaf-ward information is untouched.
1676 */
1677 int /* error */
1678 xfs_bmbt_decrement(
1679 xfs_btree_cur_t *cur,
1680 int level,
1681 int *stat) /* success/failure */
1682 {
1683 xfs_bmbt_block_t *block;
1684 xfs_buf_t *bp;
1685 int error; /* error return value */
1686 xfs_fsblock_t fsbno;
1687 int lev;
1688 xfs_mount_t *mp;
1689 xfs_trans_t *tp;
1690
1691 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1692 XFS_BMBT_TRACE_ARGI(cur, level);
1693 ASSERT(level < cur->bc_nlevels);
1694 if (level < cur->bc_nlevels - 1)
1695 xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
1696 if (--cur->bc_ptrs[level] > 0) {
1697 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1698 *stat = 1;
1699 return 0;
1700 }
1701 block = xfs_bmbt_get_block(cur, level, &bp);
1702 #ifdef DEBUG
1703 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1704 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1705 return error;
1706 }
1707 #endif
1708 if (be64_to_cpu(block->bb_leftsib) == NULLDFSBNO) {
1709 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1710 *stat = 0;
1711 return 0;
1712 }
1713 for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
1714 if (--cur->bc_ptrs[lev] > 0)
1715 break;
1716 if (lev < cur->bc_nlevels - 1)
1717 xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
1718 }
1719 if (lev == cur->bc_nlevels) {
1720 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1721 *stat = 0;
1722 return 0;
1723 }
1724 tp = cur->bc_tp;
1725 mp = cur->bc_mp;
1726 for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
1727 fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur));
1728 if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
1729 XFS_BMAP_BTREE_REF))) {
1730 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1731 return error;
1732 }
1733 lev--;
1734 xfs_btree_setbuf(cur, lev, bp);
1735 block = XFS_BUF_TO_BMBT_BLOCK(bp);
1736 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
1737 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1738 return error;
1739 }
1740 cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs);
1741 }
1742 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1743 *stat = 1;
1744 return 0;
1745 }
1746
1747 /*
1748 * Delete the record pointed to by cur.
1749 */
1750 int /* error */
1751 xfs_bmbt_delete(
1752 xfs_btree_cur_t *cur,
1753 int *stat) /* success/failure */
1754 {
1755 int error; /* error return value */
1756 int i;
1757 int level;
1758
1759 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1760 for (level = 0, i = 2; i == 2; level++) {
1761 if ((error = xfs_bmbt_delrec(cur, level, &i))) {
1762 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1763 return error;
1764 }
1765 }
1766 if (i == 0) {
1767 for (level = 1; level < cur->bc_nlevels; level++) {
1768 if (cur->bc_ptrs[level] == 0) {
1769 if ((error = xfs_bmbt_decrement(cur, level,
1770 &i))) {
1771 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1772 return error;
1773 }
1774 break;
1775 }
1776 }
1777 }
1778 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1779 *stat = i;
1780 return 0;
1781 }
1782
1783 /*
1784 * Convert a compressed bmap extent record to an uncompressed form.
1785 * This code must be in sync with the routines xfs_bmbt_get_startoff,
1786 * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
1787 */
1788
1789 STATIC_INLINE void
1790 __xfs_bmbt_get_all(
1791 __uint64_t l0,
1792 __uint64_t l1,
1793 xfs_bmbt_irec_t *s)
1794 {
1795 int ext_flag;
1796 xfs_exntst_t st;
1797
1798 ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
1799 s->br_startoff = ((xfs_fileoff_t)l0 &
1800 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
1801 #if XFS_BIG_BLKNOS
1802 s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) |
1803 (((xfs_fsblock_t)l1) >> 21);
1804 #else
1805 #ifdef DEBUG
1806 {
1807 xfs_dfsbno_t b;
1808
1809 b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) |
1810 (((xfs_dfsbno_t)l1) >> 21);
1811 ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
1812 s->br_startblock = (xfs_fsblock_t)b;
1813 }
1814 #else /* !DEBUG */
1815 s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
1816 #endif /* DEBUG */
1817 #endif /* XFS_BIG_BLKNOS */
1818 s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21));
1819 /* This is xfs_extent_state() in-line */
1820 if (ext_flag) {
1821 ASSERT(s->br_blockcount != 0); /* saved for DMIG */
1822 st = XFS_EXT_UNWRITTEN;
1823 } else
1824 st = XFS_EXT_NORM;
1825 s->br_state = st;
1826 }
1827
1828 void
1829 xfs_bmbt_get_all(
1830 xfs_bmbt_rec_host_t *r,
1831 xfs_bmbt_irec_t *s)
1832 {
1833 __xfs_bmbt_get_all(r->l0, r->l1, s);
1834 }
1835
1836 /*
1837 * Get the block pointer for the given level of the cursor.
1838 * Fill in the buffer pointer, if applicable.
1839 */
1840 xfs_bmbt_block_t *
1841 xfs_bmbt_get_block(
1842 xfs_btree_cur_t *cur,
1843 int level,
1844 xfs_buf_t **bpp)
1845 {
1846 xfs_ifork_t *ifp;
1847 xfs_bmbt_block_t *rval;
1848
1849 if (level < cur->bc_nlevels - 1) {
1850 *bpp = cur->bc_bufs[level];
1851 rval = XFS_BUF_TO_BMBT_BLOCK(*bpp);
1852 } else {
1853 *bpp = NULL;
1854 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
1855 cur->bc_private.b.whichfork);
1856 rval = ifp->if_broot;
1857 }
1858 return rval;
1859 }
1860
1861 /*
1862 * Extract the blockcount field from an in memory bmap extent record.
1863 */
1864 xfs_filblks_t
1865 xfs_bmbt_get_blockcount(
1866 xfs_bmbt_rec_host_t *r)
1867 {
1868 return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
1869 }
1870
1871 /*
1872 * Extract the startblock field from an in memory bmap extent record.
1873 */
1874 xfs_fsblock_t
1875 xfs_bmbt_get_startblock(
1876 xfs_bmbt_rec_host_t *r)
1877 {
1878 #if XFS_BIG_BLKNOS
1879 return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) |
1880 (((xfs_fsblock_t)r->l1) >> 21);
1881 #else
1882 #ifdef DEBUG
1883 xfs_dfsbno_t b;
1884
1885 b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) |
1886 (((xfs_dfsbno_t)r->l1) >> 21);
1887 ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
1888 return (xfs_fsblock_t)b;
1889 #else /* !DEBUG */
1890 return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
1891 #endif /* DEBUG */
1892 #endif /* XFS_BIG_BLKNOS */
1893 }
1894
1895 /*
1896 * Extract the startoff field from an in memory bmap extent record.
1897 */
1898 xfs_fileoff_t
1899 xfs_bmbt_get_startoff(
1900 xfs_bmbt_rec_host_t *r)
1901 {
1902 return ((xfs_fileoff_t)r->l0 &
1903 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
1904 }
1905
1906 xfs_exntst_t
1907 xfs_bmbt_get_state(
1908 xfs_bmbt_rec_host_t *r)
1909 {
1910 int ext_flag;
1911
1912 ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
1913 return xfs_extent_state(xfs_bmbt_get_blockcount(r),
1914 ext_flag);
1915 }
1916
1917 /* Endian flipping versions of the bmbt extraction functions */
1918 void
1919 xfs_bmbt_disk_get_all(
1920 xfs_bmbt_rec_t *r,
1921 xfs_bmbt_irec_t *s)
1922 {
1923 __xfs_bmbt_get_all(be64_to_cpu(r->l0), be64_to_cpu(r->l1), s);
1924 }
1925
1926 /*
1927 * Extract the blockcount field from an on disk bmap extent record.
1928 */
1929 xfs_filblks_t
1930 xfs_bmbt_disk_get_blockcount(
1931 xfs_bmbt_rec_t *r)
1932 {
1933 return (xfs_filblks_t)(be64_to_cpu(r->l1) & XFS_MASK64LO(21));
1934 }
1935
1936 /*
1937 * Extract the startoff field from a disk format bmap extent record.
1938 */
1939 xfs_fileoff_t
1940 xfs_bmbt_disk_get_startoff(
1941 xfs_bmbt_rec_t *r)
1942 {
1943 return ((xfs_fileoff_t)be64_to_cpu(r->l0) &
1944 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
1945 }
1946
1947 /*
1948 * Increment cursor by one record at the level.
1949 * For nonzero levels the leaf-ward information is untouched.
1950 */
1951 int /* error */
1952 xfs_bmbt_increment(
1953 xfs_btree_cur_t *cur,
1954 int level,
1955 int *stat) /* success/failure */
1956 {
1957 xfs_bmbt_block_t *block;
1958 xfs_buf_t *bp;
1959 int error; /* error return value */
1960 xfs_fsblock_t fsbno;
1961 int lev;
1962 xfs_mount_t *mp;
1963 xfs_trans_t *tp;
1964
1965 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
1966 XFS_BMBT_TRACE_ARGI(cur, level);
1967 ASSERT(level < cur->bc_nlevels);
1968 if (level < cur->bc_nlevels - 1)
1969 xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
1970 block = xfs_bmbt_get_block(cur, level, &bp);
1971 #ifdef DEBUG
1972 if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
1973 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1974 return error;
1975 }
1976 #endif
1977 if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) {
1978 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1979 *stat = 1;
1980 return 0;
1981 }
1982 if (be64_to_cpu(block->bb_rightsib) == NULLDFSBNO) {
1983 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
1984 *stat = 0;
1985 return 0;
1986 }
1987 for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
1988 block = xfs_bmbt_get_block(cur, lev, &bp);
1989 #ifdef DEBUG
1990 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
1991 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
1992 return error;
1993 }
1994 #endif
1995 if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs))
1996 break;
1997 if (lev < cur->bc_nlevels - 1)
1998 xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
1999 }
2000 if (lev == cur->bc_nlevels) {
2001 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2002 *stat = 0;
2003 return 0;
2004 }
2005 tp = cur->bc_tp;
2006 mp = cur->bc_mp;
2007 for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
2008 fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur));
2009 if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
2010 XFS_BMAP_BTREE_REF))) {
2011 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2012 return error;
2013 }
2014 lev--;
2015 xfs_btree_setbuf(cur, lev, bp);
2016 block = XFS_BUF_TO_BMBT_BLOCK(bp);
2017 if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
2018 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2019 return error;
2020 }
2021 cur->bc_ptrs[lev] = 1;
2022 }
2023 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2024 *stat = 1;
2025 return 0;
2026 }
2027
2028 /*
2029 * Insert the current record at the point referenced by cur.
2030 */
2031 int /* error */
2032 xfs_bmbt_insert(
2033 xfs_btree_cur_t *cur,
2034 int *stat) /* success/failure */
2035 {
2036 int error; /* error return value */
2037 int i;
2038 int level;
2039 xfs_fsblock_t nbno;
2040 xfs_btree_cur_t *ncur;
2041 xfs_bmbt_rec_t nrec;
2042 xfs_btree_cur_t *pcur;
2043
2044 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2045 level = 0;
2046 nbno = NULLFSBLOCK;
2047 xfs_bmbt_disk_set_all(&nrec, &cur->bc_rec.b);
2048 ncur = NULL;
2049 pcur = cur;
2050 do {
2051 if ((error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur,
2052 &i))) {
2053 if (pcur != cur)
2054 xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR);
2055 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2056 return error;
2057 }
2058 XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
2059 if (pcur != cur && (ncur || nbno == NULLFSBLOCK)) {
2060 cur->bc_nlevels = pcur->bc_nlevels;
2061 cur->bc_private.b.allocated +=
2062 pcur->bc_private.b.allocated;
2063 pcur->bc_private.b.allocated = 0;
2064 ASSERT((cur->bc_private.b.firstblock != NULLFSBLOCK) ||
2065 (cur->bc_private.b.ip->i_d.di_flags &
2066 XFS_DIFLAG_REALTIME));
2067 cur->bc_private.b.firstblock =
2068 pcur->bc_private.b.firstblock;
2069 ASSERT(cur->bc_private.b.flist ==
2070 pcur->bc_private.b.flist);
2071 xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR);
2072 }
2073 if (ncur) {
2074 pcur = ncur;
2075 ncur = NULL;
2076 }
2077 } while (nbno != NULLFSBLOCK);
2078 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2079 *stat = i;
2080 return 0;
2081 error0:
2082 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2083 return error;
2084 }
2085
2086 /*
2087 * Log fields from the btree block header.
2088 */
2089 void
2090 xfs_bmbt_log_block(
2091 xfs_btree_cur_t *cur,
2092 xfs_buf_t *bp,
2093 int fields)
2094 {
2095 int first;
2096 int last;
2097 xfs_trans_t *tp;
2098 static const short offsets[] = {
2099 offsetof(xfs_bmbt_block_t, bb_magic),
2100 offsetof(xfs_bmbt_block_t, bb_level),
2101 offsetof(xfs_bmbt_block_t, bb_numrecs),
2102 offsetof(xfs_bmbt_block_t, bb_leftsib),
2103 offsetof(xfs_bmbt_block_t, bb_rightsib),
2104 sizeof(xfs_bmbt_block_t)
2105 };
2106
2107 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2108 XFS_BMBT_TRACE_ARGBI(cur, bp, fields);
2109 tp = cur->bc_tp;
2110 if (bp) {
2111 xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first,
2112 &last);
2113 xfs_trans_log_buf(tp, bp, first, last);
2114 } else
2115 xfs_trans_log_inode(tp, cur->bc_private.b.ip,
2116 XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
2117 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2118 }
2119
2120 /*
2121 * Log record values from the btree block.
2122 */
2123 void
2124 xfs_bmbt_log_recs(
2125 xfs_btree_cur_t *cur,
2126 xfs_buf_t *bp,
2127 int rfirst,
2128 int rlast)
2129 {
2130 xfs_bmbt_block_t *block;
2131 int first;
2132 int last;
2133 xfs_bmbt_rec_t *rp;
2134 xfs_trans_t *tp;
2135
2136 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2137 XFS_BMBT_TRACE_ARGBII(cur, bp, rfirst, rlast);
2138 ASSERT(bp);
2139 tp = cur->bc_tp;
2140 block = XFS_BUF_TO_BMBT_BLOCK(bp);
2141 rp = XFS_BMAP_REC_DADDR(block, 1, cur);
2142 first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block);
2143 last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block);
2144 xfs_trans_log_buf(tp, bp, first, last);
2145 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2146 }
2147
2148 int /* error */
2149 xfs_bmbt_lookup_eq(
2150 xfs_btree_cur_t *cur,
2151 xfs_fileoff_t off,
2152 xfs_fsblock_t bno,
2153 xfs_filblks_t len,
2154 int *stat) /* success/failure */
2155 {
2156 cur->bc_rec.b.br_startoff = off;
2157 cur->bc_rec.b.br_startblock = bno;
2158 cur->bc_rec.b.br_blockcount = len;
2159 return xfs_bmbt_lookup(cur, XFS_LOOKUP_EQ, stat);
2160 }
2161
2162 int /* error */
2163 xfs_bmbt_lookup_ge(
2164 xfs_btree_cur_t *cur,
2165 xfs_fileoff_t off,
2166 xfs_fsblock_t bno,
2167 xfs_filblks_t len,
2168 int *stat) /* success/failure */
2169 {
2170 cur->bc_rec.b.br_startoff = off;
2171 cur->bc_rec.b.br_startblock = bno;
2172 cur->bc_rec.b.br_blockcount = len;
2173 return xfs_bmbt_lookup(cur, XFS_LOOKUP_GE, stat);
2174 }
2175
2176 /*
2177 * Give the bmap btree a new root block. Copy the old broot contents
2178 * down into a real block and make the broot point to it.
2179 */
2180 int /* error */
2181 xfs_bmbt_newroot(
2182 xfs_btree_cur_t *cur, /* btree cursor */
2183 int *logflags, /* logging flags for inode */
2184 int *stat) /* return status - 0 fail */
2185 {
2186 xfs_alloc_arg_t args; /* allocation arguments */
2187 xfs_bmbt_block_t *block; /* bmap btree block */
2188 xfs_buf_t *bp; /* buffer for block */
2189 xfs_bmbt_block_t *cblock; /* child btree block */
2190 xfs_bmbt_key_t *ckp; /* child key pointer */
2191 xfs_bmbt_ptr_t *cpp; /* child ptr pointer */
2192 int error; /* error return code */
2193 #ifdef DEBUG
2194 int i; /* loop counter */
2195 #endif
2196 xfs_bmbt_key_t *kp; /* pointer to bmap btree key */
2197 int level; /* btree level */
2198 xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */
2199
2200 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2201 level = cur->bc_nlevels - 1;
2202 block = xfs_bmbt_get_block(cur, level, &bp);
2203 /*
2204 * Copy the root into a real block.
2205 */
2206 args.mp = cur->bc_mp;
2207 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
2208 args.tp = cur->bc_tp;
2209 args.fsbno = cur->bc_private.b.firstblock;
2210 args.mod = args.minleft = args.alignment = args.total = args.isfl =
2211 args.userdata = args.minalignslop = 0;
2212 args.minlen = args.maxlen = args.prod = 1;
2213 args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
2214 args.firstblock = args.fsbno;
2215 if (args.fsbno == NULLFSBLOCK) {
2216 #ifdef DEBUG
2217 if ((error = xfs_btree_check_lptr_disk(cur, *pp, level))) {
2218 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2219 return error;
2220 }
2221 #endif
2222 args.fsbno = be64_to_cpu(*pp);
2223 args.type = XFS_ALLOCTYPE_START_BNO;
2224 } else
2225 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2226 if ((error = xfs_alloc_vextent(&args))) {
2227 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2228 return error;
2229 }
2230 if (args.fsbno == NULLFSBLOCK) {
2231 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2232 *stat = 0;
2233 return 0;
2234 }
2235 ASSERT(args.len == 1);
2236 cur->bc_private.b.firstblock = args.fsbno;
2237 cur->bc_private.b.allocated++;
2238 cur->bc_private.b.ip->i_d.di_nblocks++;
2239 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
2240 XFS_TRANS_DQ_BCOUNT, 1L);
2241 bp = xfs_btree_get_bufl(args.mp, cur->bc_tp, args.fsbno, 0);
2242 cblock = XFS_BUF_TO_BMBT_BLOCK(bp);
2243 *cblock = *block;
2244 be16_add(&block->bb_level, 1);
2245 block->bb_numrecs = cpu_to_be16(1);
2246 cur->bc_nlevels++;
2247 cur->bc_ptrs[level + 1] = 1;
2248 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
2249 ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
2250 memcpy(ckp, kp, be16_to_cpu(cblock->bb_numrecs) * sizeof(*kp));
2251 cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
2252 #ifdef DEBUG
2253 for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
2254 if ((error = xfs_btree_check_lptr_disk(cur, pp[i], level))) {
2255 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2256 return error;
2257 }
2258 }
2259 #endif
2260 memcpy(cpp, pp, be16_to_cpu(cblock->bb_numrecs) * sizeof(*pp));
2261 #ifdef DEBUG
2262 if ((error = xfs_btree_check_lptr(cur, args.fsbno, level))) {
2263 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2264 return error;
2265 }
2266 #endif
2267 *pp = cpu_to_be64(args.fsbno);
2268 xfs_iroot_realloc(cur->bc_private.b.ip, 1 - be16_to_cpu(cblock->bb_numrecs),
2269 cur->bc_private.b.whichfork);
2270 xfs_btree_setbuf(cur, level, bp);
2271 /*
2272 * Do all this logging at the end so that
2273 * the root is at the right level.
2274 */
2275 xfs_bmbt_log_block(cur, bp, XFS_BB_ALL_BITS);
2276 xfs_bmbt_log_keys(cur, bp, 1, be16_to_cpu(cblock->bb_numrecs));
2277 xfs_bmbt_log_ptrs(cur, bp, 1, be16_to_cpu(cblock->bb_numrecs));
2278 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2279 *logflags |=
2280 XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork);
2281 *stat = 1;
2282 return 0;
2283 }
2284
2285 /*
2286 * Set all the fields in a bmap extent record from the arguments.
2287 */
2288 void
2289 xfs_bmbt_set_allf(
2290 xfs_bmbt_rec_host_t *r,
2291 xfs_fileoff_t startoff,
2292 xfs_fsblock_t startblock,
2293 xfs_filblks_t blockcount,
2294 xfs_exntst_t state)
2295 {
2296 int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
2297
2298 ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
2299 ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
2300 ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
2301
2302 #if XFS_BIG_BLKNOS
2303 ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
2304
2305 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2306 ((xfs_bmbt_rec_base_t)startoff << 9) |
2307 ((xfs_bmbt_rec_base_t)startblock >> 43);
2308 r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
2309 ((xfs_bmbt_rec_base_t)blockcount &
2310 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2311 #else /* !XFS_BIG_BLKNOS */
2312 if (ISNULLSTARTBLOCK(startblock)) {
2313 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2314 ((xfs_bmbt_rec_base_t)startoff << 9) |
2315 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2316 r->l1 = XFS_MASK64HI(11) |
2317 ((xfs_bmbt_rec_base_t)startblock << 21) |
2318 ((xfs_bmbt_rec_base_t)blockcount &
2319 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2320 } else {
2321 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2322 ((xfs_bmbt_rec_base_t)startoff << 9);
2323 r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
2324 ((xfs_bmbt_rec_base_t)blockcount &
2325 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2326 }
2327 #endif /* XFS_BIG_BLKNOS */
2328 }
2329
2330 /*
2331 * Set all the fields in a bmap extent record from the uncompressed form.
2332 */
2333 void
2334 xfs_bmbt_set_all(
2335 xfs_bmbt_rec_host_t *r,
2336 xfs_bmbt_irec_t *s)
2337 {
2338 xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock,
2339 s->br_blockcount, s->br_state);
2340 }
2341
2342
2343 /*
2344 * Set all the fields in a disk format bmap extent record from the arguments.
2345 */
2346 void
2347 xfs_bmbt_disk_set_allf(
2348 xfs_bmbt_rec_t *r,
2349 xfs_fileoff_t startoff,
2350 xfs_fsblock_t startblock,
2351 xfs_filblks_t blockcount,
2352 xfs_exntst_t state)
2353 {
2354 int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
2355
2356 ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
2357 ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
2358 ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
2359
2360 #if XFS_BIG_BLKNOS
2361 ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
2362
2363 r->l0 = cpu_to_be64(
2364 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2365 ((xfs_bmbt_rec_base_t)startoff << 9) |
2366 ((xfs_bmbt_rec_base_t)startblock >> 43));
2367 r->l1 = cpu_to_be64(
2368 ((xfs_bmbt_rec_base_t)startblock << 21) |
2369 ((xfs_bmbt_rec_base_t)blockcount &
2370 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2371 #else /* !XFS_BIG_BLKNOS */
2372 if (ISNULLSTARTBLOCK(startblock)) {
2373 r->l0 = cpu_to_be64(
2374 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2375 ((xfs_bmbt_rec_base_t)startoff << 9) |
2376 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2377 r->l1 = cpu_to_be64(XFS_MASK64HI(11) |
2378 ((xfs_bmbt_rec_base_t)startblock << 21) |
2379 ((xfs_bmbt_rec_base_t)blockcount &
2380 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2381 } else {
2382 r->l0 = cpu_to_be64(
2383 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
2384 ((xfs_bmbt_rec_base_t)startoff << 9));
2385 r->l1 = cpu_to_be64(
2386 ((xfs_bmbt_rec_base_t)startblock << 21) |
2387 ((xfs_bmbt_rec_base_t)blockcount &
2388 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
2389 }
2390 #endif /* XFS_BIG_BLKNOS */
2391 }
2392
2393 /*
2394 * Set all the fields in a bmap extent record from the uncompressed form.
2395 */
2396 void
2397 xfs_bmbt_disk_set_all(
2398 xfs_bmbt_rec_t *r,
2399 xfs_bmbt_irec_t *s)
2400 {
2401 xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock,
2402 s->br_blockcount, s->br_state);
2403 }
2404
2405 /*
2406 * Set the blockcount field in a bmap extent record.
2407 */
2408 void
2409 xfs_bmbt_set_blockcount(
2410 xfs_bmbt_rec_host_t *r,
2411 xfs_filblks_t v)
2412 {
2413 ASSERT((v & XFS_MASK64HI(43)) == 0);
2414 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
2415 (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
2416 }
2417
2418 /*
2419 * Set the startblock field in a bmap extent record.
2420 */
2421 void
2422 xfs_bmbt_set_startblock(
2423 xfs_bmbt_rec_host_t *r,
2424 xfs_fsblock_t v)
2425 {
2426 #if XFS_BIG_BLKNOS
2427 ASSERT((v & XFS_MASK64HI(12)) == 0);
2428 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) |
2429 (xfs_bmbt_rec_base_t)(v >> 43);
2430 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) |
2431 (xfs_bmbt_rec_base_t)(v << 21);
2432 #else /* !XFS_BIG_BLKNOS */
2433 if (ISNULLSTARTBLOCK(v)) {
2434 r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2435 r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) |
2436 ((xfs_bmbt_rec_base_t)v << 21) |
2437 (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2438 } else {
2439 r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
2440 r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
2441 (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
2442 }
2443 #endif /* XFS_BIG_BLKNOS */
2444 }
2445
2446 /*
2447 * Set the startoff field in a bmap extent record.
2448 */
2449 void
2450 xfs_bmbt_set_startoff(
2451 xfs_bmbt_rec_host_t *r,
2452 xfs_fileoff_t v)
2453 {
2454 ASSERT((v & XFS_MASK64HI(9)) == 0);
2455 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) |
2456 ((xfs_bmbt_rec_base_t)v << 9) |
2457 (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
2458 }
2459
2460 /*
2461 * Set the extent state field in a bmap extent record.
2462 */
2463 void
2464 xfs_bmbt_set_state(
2465 xfs_bmbt_rec_host_t *r,
2466 xfs_exntst_t v)
2467 {
2468 ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
2469 if (v == XFS_EXT_NORM)
2470 r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN);
2471 else
2472 r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN);
2473 }
2474
2475 /*
2476 * Convert in-memory form of btree root to on-disk form.
2477 */
2478 void
2479 xfs_bmbt_to_bmdr(
2480 xfs_bmbt_block_t *rblock,
2481 int rblocklen,
2482 xfs_bmdr_block_t *dblock,
2483 int dblocklen)
2484 {
2485 int dmxr;
2486 xfs_bmbt_key_t *fkp;
2487 __be64 *fpp;
2488 xfs_bmbt_key_t *tkp;
2489 __be64 *tpp;
2490
2491 ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC);
2492 ASSERT(be64_to_cpu(rblock->bb_leftsib) == NULLDFSBNO);
2493 ASSERT(be64_to_cpu(rblock->bb_rightsib) == NULLDFSBNO);
2494 ASSERT(be16_to_cpu(rblock->bb_level) > 0);
2495 dblock->bb_level = rblock->bb_level;
2496 dblock->bb_numrecs = rblock->bb_numrecs;
2497 dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
2498 fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
2499 tkp = XFS_BTREE_KEY_ADDR(xfs_bmdr, dblock, 1);
2500 fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
2501 tpp = XFS_BTREE_PTR_ADDR(xfs_bmdr, dblock, 1, dmxr);
2502 dmxr = be16_to_cpu(dblock->bb_numrecs);
2503 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
2504 memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
2505 }
2506
2507 /*
2508 * Update the record to the passed values.
2509 */
2510 int
2511 xfs_bmbt_update(
2512 xfs_btree_cur_t *cur,
2513 xfs_fileoff_t off,
2514 xfs_fsblock_t bno,
2515 xfs_filblks_t len,
2516 xfs_exntst_t state)
2517 {
2518 xfs_bmbt_block_t *block;
2519 xfs_buf_t *bp;
2520 int error;
2521 xfs_bmbt_key_t key;
2522 int ptr;
2523 xfs_bmbt_rec_t *rp;
2524
2525 XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
2526 XFS_BMBT_TRACE_ARGFFFI(cur, (xfs_dfiloff_t)off, (xfs_dfsbno_t)bno,
2527 (xfs_dfilblks_t)len, (int)state);
2528 block = xfs_bmbt_get_block(cur, 0, &bp);
2529 #ifdef DEBUG
2530 if ((error = xfs_btree_check_lblock(cur, block, 0, bp))) {
2531 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2532 return error;
2533 }
2534 #endif
2535 ptr = cur->bc_ptrs[0];
2536 rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
2537 xfs_bmbt_disk_set_allf(rp, off, bno, len, state);
2538 xfs_bmbt_log_recs(cur, bp, ptr, ptr);
2539 if (ptr > 1) {
2540 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2541 return 0;
2542 }
2543 key.br_startoff = cpu_to_be64(off);
2544 if ((error = xfs_bmbt_updkey(cur, &key, 1))) {
2545 XFS_BMBT_TRACE_CURSOR(cur, ERROR);
2546 return error;
2547 }
2548 XFS_BMBT_TRACE_CURSOR(cur, EXIT);
2549 return 0;
2550 }
2551
2552 /*
2553 * Check extent records, which have just been read, for
2554 * any bit in the extent flag field. ASSERT on debug
2555 * kernels, as this condition should not occur.
2556 * Return an error condition (1) if any flags found,
2557 * otherwise return 0.
2558 */
2559
2560 int
2561 xfs_check_nostate_extents(
2562 xfs_ifork_t *ifp,
2563 xfs_extnum_t idx,
2564 xfs_extnum_t num)
2565 {
2566 for (; num > 0; num--, idx++) {
2567 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
2568 if ((ep->l0 >>
2569 (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
2570 ASSERT(0);
2571 return 1;
2572 }
2573 }
2574 return 0;
2575 }
WRT350N Kernel Patches