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powerpc: Fix personality handling in ppc64_personality()
[linux/fpc-iii.git] / fs / xfs / xfs_itable.c
blob01d10a66e30243518d293f2c72a29b6135f7977b
1 /*
2 * Copyright (c) 2000-2002,2005 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_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_mount.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_alloc_btree.h"
29 #include "xfs_ialloc_btree.h"
30 #include "xfs_dinode.h"
31 #include "xfs_inode.h"
32 #include "xfs_ialloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
35 #include "xfs_btree.h"
36 #include "xfs_trace.h"
37
38 STATIC int
39 xfs_internal_inum(
40 xfs_mount_t *mp,
41 xfs_ino_t ino)
42 {
43 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
44 (xfs_sb_version_hasquota(&mp->m_sb) &&
45 (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino)));
46 }
47
48 /*
49 * Return stat information for one inode.
50 * Return 0 if ok, else errno.
51 */
52 int
53 xfs_bulkstat_one_int(
54 struct xfs_mount *mp, /* mount point for filesystem */
55 xfs_ino_t ino, /* inode to get data for */
56 void __user *buffer, /* buffer to place output in */
57 int ubsize, /* size of buffer */
58 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
59 int *ubused, /* bytes used by me */
60 int *stat) /* BULKSTAT_RV_... */
61 {
62 struct xfs_icdinode *dic; /* dinode core info pointer */
63 struct xfs_inode *ip; /* incore inode pointer */
64 struct xfs_bstat *buf; /* return buffer */
65 int error = 0; /* error value */
66
67 *stat = BULKSTAT_RV_NOTHING;
68
69 if (!buffer || xfs_internal_inum(mp, ino))
70 return XFS_ERROR(EINVAL);
71
72 buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
73 if (!buf)
74 return XFS_ERROR(ENOMEM);
75
76 error = xfs_iget(mp, NULL, ino,
77 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
78 XFS_ILOCK_SHARED, &ip);
79 if (error) {
80 *stat = BULKSTAT_RV_NOTHING;
81 goto out_free;
82 }
83
84 ASSERT(ip != NULL);
85 ASSERT(ip->i_imap.im_blkno != 0);
86
87 dic = &ip->i_d;
88
89 /* xfs_iget returns the following without needing
90 * further change.
91 */
92 buf->bs_nlink = dic->di_nlink;
93 buf->bs_projid_lo = dic->di_projid_lo;
94 buf->bs_projid_hi = dic->di_projid_hi;
95 buf->bs_ino = ino;
96 buf->bs_mode = dic->di_mode;
97 buf->bs_uid = dic->di_uid;
98 buf->bs_gid = dic->di_gid;
99 buf->bs_size = dic->di_size;
100 buf->bs_atime.tv_sec = dic->di_atime.t_sec;
101 buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
102 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
103 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
104 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
105 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
106 buf->bs_xflags = xfs_ip2xflags(ip);
107 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
108 buf->bs_extents = dic->di_nextents;
109 buf->bs_gen = dic->di_gen;
110 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
111 buf->bs_dmevmask = dic->di_dmevmask;
112 buf->bs_dmstate = dic->di_dmstate;
113 buf->bs_aextents = dic->di_anextents;
114 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
115
116 switch (dic->di_format) {
117 case XFS_DINODE_FMT_DEV:
118 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
119 buf->bs_blksize = BLKDEV_IOSIZE;
120 buf->bs_blocks = 0;
121 break;
122 case XFS_DINODE_FMT_LOCAL:
123 case XFS_DINODE_FMT_UUID:
124 buf->bs_rdev = 0;
125 buf->bs_blksize = mp->m_sb.sb_blocksize;
126 buf->bs_blocks = 0;
127 break;
128 case XFS_DINODE_FMT_EXTENTS:
129 case XFS_DINODE_FMT_BTREE:
130 buf->bs_rdev = 0;
131 buf->bs_blksize = mp->m_sb.sb_blocksize;
132 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
133 break;
134 }
135 xfs_iunlock(ip, XFS_ILOCK_SHARED);
136 IRELE(ip);
137
138 error = formatter(buffer, ubsize, ubused, buf);
139
140 if (!error)
141 *stat = BULKSTAT_RV_DIDONE;
142
143 out_free:
144 kmem_free(buf);
145 return error;
146 }
147
148 /* Return 0 on success or positive error */
149 STATIC int
150 xfs_bulkstat_one_fmt(
151 void __user *ubuffer,
152 int ubsize,
153 int *ubused,
154 const xfs_bstat_t *buffer)
155 {
156 if (ubsize < sizeof(*buffer))
157 return XFS_ERROR(ENOMEM);
158 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
159 return XFS_ERROR(EFAULT);
160 if (ubused)
161 *ubused = sizeof(*buffer);
162 return 0;
163 }
164
165 int
166 xfs_bulkstat_one(
167 xfs_mount_t *mp, /* mount point for filesystem */
168 xfs_ino_t ino, /* inode number to get data for */
169 void __user *buffer, /* buffer to place output in */
170 int ubsize, /* size of buffer */
171 int *ubused, /* bytes used by me */
172 int *stat) /* BULKSTAT_RV_... */
173 {
174 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
175 xfs_bulkstat_one_fmt, ubused, stat);
176 }
177
178 #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
179
180 /*
181 * Return stat information in bulk (by-inode) for the filesystem.
182 */
183 int /* error status */
184 xfs_bulkstat(
185 xfs_mount_t *mp, /* mount point for filesystem */
186 xfs_ino_t *lastinop, /* last inode returned */
187 int *ubcountp, /* size of buffer/count returned */
188 bulkstat_one_pf formatter, /* func that'd fill a single buf */
189 size_t statstruct_size, /* sizeof struct filling */
190 char __user *ubuffer, /* buffer with inode stats */
191 int *done) /* 1 if there are more stats to get */
192 {
193 xfs_agblock_t agbno=0;/* allocation group block number */
194 xfs_buf_t *agbp; /* agi header buffer */
195 xfs_agi_t *agi; /* agi header data */
196 xfs_agino_t agino; /* inode # in allocation group */
197 xfs_agnumber_t agno; /* allocation group number */
198 int chunkidx; /* current index into inode chunk */
199 int clustidx; /* current index into inode cluster */
200 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
201 int end_of_ag; /* set if we've seen the ag end */
202 int error; /* error code */
203 int fmterror;/* bulkstat formatter result */
204 int i; /* loop index */
205 int icount; /* count of inodes good in irbuf */
206 size_t irbsize; /* size of irec buffer in bytes */
207 xfs_ino_t ino; /* inode number (filesystem) */
208 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
209 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
210 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
211 xfs_ino_t lastino; /* last inode number returned */
212 int nbcluster; /* # of blocks in a cluster */
213 int nicluster; /* # of inodes in a cluster */
214 int nimask; /* mask for inode clusters */
215 int nirbuf; /* size of irbuf */
216 int rval; /* return value error code */
217 int tmp; /* result value from btree calls */
218 int ubcount; /* size of user's buffer */
219 int ubleft; /* bytes left in user's buffer */
220 char __user *ubufp; /* pointer into user's buffer */
221 int ubelem; /* spaces used in user's buffer */
222 int ubused; /* bytes used by formatter */
223 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
224
225 /*
226 * Get the last inode value, see if there's nothing to do.
227 */
228 ino = (xfs_ino_t)*lastinop;
229 lastino = ino;
230 agno = XFS_INO_TO_AGNO(mp, ino);
231 agino = XFS_INO_TO_AGINO(mp, ino);
232 if (agno >= mp->m_sb.sb_agcount ||
233 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
234 *done = 1;
235 *ubcountp = 0;
236 return 0;
237 }
238 if (!ubcountp || *ubcountp <= 0) {
239 return EINVAL;
240 }
241 ubcount = *ubcountp; /* statstruct's */
242 ubleft = ubcount * statstruct_size; /* bytes */
243 *ubcountp = ubelem = 0;
244 *done = 0;
245 fmterror = 0;
246 ubufp = ubuffer;
247 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
248 mp->m_sb.sb_inopblock :
249 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
250 nimask = ~(nicluster - 1);
251 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
252 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
253 if (!irbuf)
254 return ENOMEM;
255
256 nirbuf = irbsize / sizeof(*irbuf);
257
258 /*
259 * Loop over the allocation groups, starting from the last
260 * inode returned; 0 means start of the allocation group.
261 */
262 rval = 0;
263 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
264 cond_resched();
265 bp = NULL;
266 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
267 if (error) {
268 /*
269 * Skip this allocation group and go to the next one.
270 */
271 agno++;
272 agino = 0;
273 continue;
274 }
275 agi = XFS_BUF_TO_AGI(agbp);
276 /*
277 * Allocate and initialize a btree cursor for ialloc btree.
278 */
279 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
280 irbp = irbuf;
281 irbufend = irbuf + nirbuf;
282 end_of_ag = 0;
283 /*
284 * If we're returning in the middle of an allocation group,
285 * we need to get the remainder of the chunk we're in.
286 */
287 if (agino > 0) {
288 xfs_inobt_rec_incore_t r;
289
290 /*
291 * Lookup the inode chunk that this inode lives in.
292 */
293 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE,
294 &tmp);
295 if (!error && /* no I/O error */
296 tmp && /* lookup succeeded */
297 /* got the record, should always work */
298 !(error = xfs_inobt_get_rec(cur, &r, &i)) &&
299 i == 1 &&
300 /* this is the right chunk */
301 agino < r.ir_startino + XFS_INODES_PER_CHUNK &&
302 /* lastino was not last in chunk */
303 (chunkidx = agino - r.ir_startino + 1) <
304 XFS_INODES_PER_CHUNK &&
305 /* there are some left allocated */
306 xfs_inobt_maskn(chunkidx,
307 XFS_INODES_PER_CHUNK - chunkidx) &
308 ~r.ir_free) {
309 /*
310 * Grab the chunk record. Mark all the
311 * uninteresting inodes (because they're
312 * before our start point) free.
313 */
314 for (i = 0; i < chunkidx; i++) {
315 if (XFS_INOBT_MASK(i) & ~r.ir_free)
316 r.ir_freecount++;
317 }
318 r.ir_free |= xfs_inobt_maskn(0, chunkidx);
319 irbp->ir_startino = r.ir_startino;
320 irbp->ir_freecount = r.ir_freecount;
321 irbp->ir_free = r.ir_free;
322 irbp++;
323 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
324 icount = XFS_INODES_PER_CHUNK - r.ir_freecount;
325 } else {
326 /*
327 * If any of those tests failed, bump the
328 * inode number (just in case).
329 */
330 agino++;
331 icount = 0;
332 }
333 /*
334 * In any case, increment to the next record.
335 */
336 if (!error)
337 error = xfs_btree_increment(cur, 0, &tmp);
338 } else {
339 /*
340 * Start of ag. Lookup the first inode chunk.
341 */
342 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
343 icount = 0;
344 }
345 /*
346 * Loop through inode btree records in this ag,
347 * until we run out of inodes or space in the buffer.
348 */
349 while (irbp < irbufend && icount < ubcount) {
350 xfs_inobt_rec_incore_t r;
351
352 /*
353 * Loop as long as we're unable to read the
354 * inode btree.
355 */
356 while (error) {
357 agino += XFS_INODES_PER_CHUNK;
358 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
359 be32_to_cpu(agi->agi_length))
360 break;
361 error = xfs_inobt_lookup(cur, agino,
362 XFS_LOOKUP_GE, &tmp);
363 cond_resched();
364 }
365 /*
366 * If ran off the end of the ag either with an error,
367 * or the normal way, set end and stop collecting.
368 */
369 if (error) {
370 end_of_ag = 1;
371 break;
372 }
373
374 error = xfs_inobt_get_rec(cur, &r, &i);
375 if (error || i == 0) {
376 end_of_ag = 1;
377 break;
378 }
379
380 /*
381 * If this chunk has any allocated inodes, save it.
382 * Also start read-ahead now for this chunk.
383 */
384 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
385 /*
386 * Loop over all clusters in the next chunk.
387 * Do a readahead if there are any allocated
388 * inodes in that cluster.
389 */
390 agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
391 for (chunkidx = 0;
392 chunkidx < XFS_INODES_PER_CHUNK;
393 chunkidx += nicluster,
394 agbno += nbcluster) {
395 if (xfs_inobt_maskn(chunkidx, nicluster)
396 & ~r.ir_free)
397 xfs_btree_reada_bufs(mp, agno,
398 agbno, nbcluster);
399 }
400 irbp->ir_startino = r.ir_startino;
401 irbp->ir_freecount = r.ir_freecount;
402 irbp->ir_free = r.ir_free;
403 irbp++;
404 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
405 }
406 /*
407 * Set agino to after this chunk and bump the cursor.
408 */
409 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
410 error = xfs_btree_increment(cur, 0, &tmp);
411 cond_resched();
412 }
413 /*
414 * Drop the btree buffers and the agi buffer.
415 * We can't hold any of the locks these represent
416 * when calling iget.
417 */
418 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
419 xfs_buf_relse(agbp);
420 /*
421 * Now format all the good inodes into the user's buffer.
422 */
423 irbufend = irbp;
424 for (irbp = irbuf;
425 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
426 /*
427 * Now process this chunk of inodes.
428 */
429 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
430 XFS_BULKSTAT_UBLEFT(ubleft) &&
431 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
432 chunkidx++, clustidx++, agino++) {
433 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
434 /*
435 * Recompute agbno if this is the
436 * first inode of the cluster.
437 *
438 * Careful with clustidx. There can be
439 * multiple clusters per chunk, a single
440 * cluster per chunk or a cluster that has
441 * inodes represented from several different
442 * chunks (if blocksize is large).
443 *
444 * Because of this, the starting clustidx is
445 * initialized to zero in this loop but must
446 * later be reset after reading in the cluster
447 * buffer.
448 */
449 if ((chunkidx & (nicluster - 1)) == 0) {
450 agbno = XFS_AGINO_TO_AGBNO(mp,
451 irbp->ir_startino) +
452 ((chunkidx & nimask) >>
453 mp->m_sb.sb_inopblog);
454 }
455 ino = XFS_AGINO_TO_INO(mp, agno, agino);
456 /*
457 * Skip if this inode is free.
458 */
459 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
460 lastino = ino;
461 continue;
462 }
463 /*
464 * Count used inodes as free so we can tell
465 * when the chunk is used up.
466 */
467 irbp->ir_freecount++;
468
469 /*
470 * Get the inode and fill in a single buffer.
471 */
472 ubused = statstruct_size;
473 error = formatter(mp, ino, ubufp, ubleft,
474 &ubused, &fmterror);
475 if (fmterror == BULKSTAT_RV_NOTHING) {
476 if (error && error != ENOENT &&
477 error != EINVAL) {
478 ubleft = 0;
479 rval = error;
480 break;
481 }
482 lastino = ino;
483 continue;
484 }
485 if (fmterror == BULKSTAT_RV_GIVEUP) {
486 ubleft = 0;
487 ASSERT(error);
488 rval = error;
489 break;
490 }
491 if (ubufp)
492 ubufp += ubused;
493 ubleft -= ubused;
494 ubelem++;
495 lastino = ino;
496 }
497
498 cond_resched();
499 }
500
501 if (bp)
502 xfs_buf_relse(bp);
503
504 /*
505 * Set up for the next loop iteration.
506 */
507 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
508 if (end_of_ag) {
509 agno++;
510 agino = 0;
511 } else
512 agino = XFS_INO_TO_AGINO(mp, lastino);
513 } else
514 break;
515 }
516 /*
517 * Done, we're either out of filesystem or space to put the data.
518 */
519 kmem_free_large(irbuf);
520 *ubcountp = ubelem;
521 /*
522 * Found some inodes, return them now and return the error next time.
523 */
524 if (ubelem)
525 rval = 0;
526 if (agno >= mp->m_sb.sb_agcount) {
527 /*
528 * If we ran out of filesystem, mark lastino as off
529 * the end of the filesystem, so the next call
530 * will return immediately.
531 */
532 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
533 *done = 1;
534 } else
535 *lastinop = (xfs_ino_t)lastino;
536
537 return rval;
538 }
539
540 /*
541 * Return stat information in bulk (by-inode) for the filesystem.
542 * Special case for non-sequential one inode bulkstat.
543 */
544 int /* error status */
545 xfs_bulkstat_single(
546 xfs_mount_t *mp, /* mount point for filesystem */
547 xfs_ino_t *lastinop, /* inode to return */
548 char __user *buffer, /* buffer with inode stats */
549 int *done) /* 1 if there are more stats to get */
550 {
551 int count; /* count value for bulkstat call */
552 int error; /* return value */
553 xfs_ino_t ino; /* filesystem inode number */
554 int res; /* result from bs1 */
555
556 /*
557 * note that requesting valid inode numbers which are not allocated
558 * to inodes will most likely cause xfs_imap_to_bp to generate warning
559 * messages about bad magic numbers. This is ok. The fact that
560 * the inode isn't actually an inode is handled by the
561 * error check below. Done this way to make the usual case faster
562 * at the expense of the error case.
563 */
564
565 ino = (xfs_ino_t)*lastinop;
566 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), 0, &res);
567 if (error) {
568 /*
569 * Special case way failed, do it the "long" way
570 * to see if that works.
571 */
572 (*lastinop)--;
573 count = 1;
574 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
575 sizeof(xfs_bstat_t), buffer, done))
576 return error;
577 if (count == 0 || (xfs_ino_t)*lastinop != ino)
578 return error == EFSCORRUPTED ?
579 XFS_ERROR(EINVAL) : error;
580 else
581 return 0;
582 }
583 *done = 0;
584 return 0;
585 }
586
587 int
588 xfs_inumbers_fmt(
589 void __user *ubuffer, /* buffer to write to */
590 const xfs_inogrp_t *buffer, /* buffer to read from */
591 long count, /* # of elements to read */
592 long *written) /* # of bytes written */
593 {
594 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
595 return -EFAULT;
596 *written = count * sizeof(*buffer);
597 return 0;
598 }
599
600 /*
601 * Return inode number table for the filesystem.
602 */
603 int /* error status */
604 xfs_inumbers(
605 xfs_mount_t *mp, /* mount point for filesystem */
606 xfs_ino_t *lastino, /* last inode returned */
607 int *count, /* size of buffer/count returned */
608 void __user *ubuffer,/* buffer with inode descriptions */
609 inumbers_fmt_pf formatter)
610 {
611 xfs_buf_t *agbp;
612 xfs_agino_t agino;
613 xfs_agnumber_t agno;
614 int bcount;
615 xfs_inogrp_t *buffer;
616 int bufidx;
617 xfs_btree_cur_t *cur;
618 int error;
619 xfs_inobt_rec_incore_t r;
620 int i;
621 xfs_ino_t ino;
622 int left;
623 int tmp;
624
625 ino = (xfs_ino_t)*lastino;
626 agno = XFS_INO_TO_AGNO(mp, ino);
627 agino = XFS_INO_TO_AGINO(mp, ino);
628 left = *count;
629 *count = 0;
630 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
631 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
632 error = bufidx = 0;
633 cur = NULL;
634 agbp = NULL;
635 while (left > 0 && agno < mp->m_sb.sb_agcount) {
636 if (agbp == NULL) {
637 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
638 if (error) {
639 /*
640 * If we can't read the AGI of this ag,
641 * then just skip to the next one.
642 */
643 ASSERT(cur == NULL);
644 agbp = NULL;
645 agno++;
646 agino = 0;
647 continue;
648 }
649 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
650 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
651 &tmp);
652 if (error) {
653 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
654 cur = NULL;
655 xfs_buf_relse(agbp);
656 agbp = NULL;
657 /*
658 * Move up the last inode in the current
659 * chunk. The lookup_ge will always get
660 * us the first inode in the next chunk.
661 */
662 agino += XFS_INODES_PER_CHUNK - 1;
663 continue;
664 }
665 }
666 error = xfs_inobt_get_rec(cur, &r, &i);
667 if (error || i == 0) {
668 xfs_buf_relse(agbp);
669 agbp = NULL;
670 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
671 cur = NULL;
672 agno++;
673 agino = 0;
674 continue;
675 }
676 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
677 buffer[bufidx].xi_startino =
678 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
679 buffer[bufidx].xi_alloccount =
680 XFS_INODES_PER_CHUNK - r.ir_freecount;
681 buffer[bufidx].xi_allocmask = ~r.ir_free;
682 bufidx++;
683 left--;
684 if (bufidx == bcount) {
685 long written;
686 if (formatter(ubuffer, buffer, bufidx, &written)) {
687 error = XFS_ERROR(EFAULT);
688 break;
689 }
690 ubuffer += written;
691 *count += bufidx;
692 bufidx = 0;
693 }
694 if (left) {
695 error = xfs_btree_increment(cur, 0, &tmp);
696 if (error) {
697 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
698 cur = NULL;
699 xfs_buf_relse(agbp);
700 agbp = NULL;
701 /*
702 * The agino value has already been bumped.
703 * Just try to skip up to it.
704 */
705 agino += XFS_INODES_PER_CHUNK;
706 continue;
707 }
708 }
709 }
710 if (!error) {
711 if (bufidx) {
712 long written;
713 if (formatter(ubuffer, buffer, bufidx, &written))
714 error = XFS_ERROR(EFAULT);
715 else
716 *count += bufidx;
717 }
718 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
719 }
720 kmem_free(buffer);
721 if (cur)
722 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
723 XFS_BTREE_NOERROR));
724 if (agbp)
725 xfs_buf_relse(agbp);
726 return error;
727 }
Linux with added FPC-III support