2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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.
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.
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
20 #include "xfs_types.h"
24 #include "xfs_trans.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_ialloc.h"
38 #include "xfs_itable.h"
39 #include "xfs_error.h"
40 #include "xfs_btree.h"
43 xfs_bulkstat_one_iget(
44 xfs_mount_t *mp, /* mount point for filesystem */
45 xfs_ino_t ino, /* inode number to get data for */
46 xfs_daddr_t bno, /* starting bno of inode cluster */
47 xfs_bstat_t *buf, /* return buffer */
48 int *stat) /* BULKSTAT_RV_... */
50 xfs_dinode_core_t *dic; /* dinode core info pointer */
51 xfs_inode_t *ip; /* incore inode pointer */
55 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, bno);
57 *stat = BULKSTAT_RV_NOTHING;
62 ASSERT(ip->i_blkno != (xfs_daddr_t)0);
63 if (ip->i_d.di_mode == 0) {
64 *stat = BULKSTAT_RV_NOTHING;
65 error = XFS_ERROR(ENOENT);
72 /* xfs_iget returns the following without needing
75 buf->bs_nlink = dic->di_nlink;
76 buf->bs_projid = dic->di_projid;
78 buf->bs_mode = dic->di_mode;
79 buf->bs_uid = dic->di_uid;
80 buf->bs_gid = dic->di_gid;
81 buf->bs_size = dic->di_size;
82 vn_atime_to_bstime(vp, &buf->bs_atime);
83 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
84 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
85 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
86 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
87 buf->bs_xflags = xfs_ip2xflags(ip);
88 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
89 buf->bs_extents = dic->di_nextents;
90 buf->bs_gen = dic->di_gen;
91 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
92 buf->bs_dmevmask = dic->di_dmevmask;
93 buf->bs_dmstate = dic->di_dmstate;
94 buf->bs_aextents = dic->di_anextents;
96 switch (dic->di_format) {
97 case XFS_DINODE_FMT_DEV:
98 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
99 buf->bs_blksize = BLKDEV_IOSIZE;
102 case XFS_DINODE_FMT_LOCAL:
103 case XFS_DINODE_FMT_UUID:
105 buf->bs_blksize = mp->m_sb.sb_blocksize;
108 case XFS_DINODE_FMT_EXTENTS:
109 case XFS_DINODE_FMT_BTREE:
111 buf->bs_blksize = mp->m_sb.sb_blocksize;
112 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
117 xfs_iput(ip, XFS_ILOCK_SHARED);
122 xfs_bulkstat_one_dinode(
123 xfs_mount_t *mp, /* mount point for filesystem */
124 xfs_ino_t ino, /* inode number to get data for */
125 xfs_dinode_t *dip, /* dinode inode pointer */
126 xfs_bstat_t *buf) /* return buffer */
128 xfs_dinode_core_t *dic; /* dinode core info pointer */
133 * The inode format changed when we moved the link count and
134 * made it 32 bits long. If this is an old format inode,
135 * convert it in memory to look like a new one. If it gets
136 * flushed to disk we will convert back before flushing or
137 * logging it. We zero out the new projid field and the old link
138 * count field. We'll handle clearing the pad field (the remains
139 * of the old uuid field) when we actually convert the inode to
140 * the new format. We don't change the version number so that we
141 * can distinguish this from a real new format inode.
143 if (INT_GET(dic->di_version, ARCH_CONVERT) == XFS_DINODE_VERSION_1) {
144 buf->bs_nlink = INT_GET(dic->di_onlink, ARCH_CONVERT);
147 buf->bs_nlink = INT_GET(dic->di_nlink, ARCH_CONVERT);
148 buf->bs_projid = INT_GET(dic->di_projid, ARCH_CONVERT);
152 buf->bs_mode = INT_GET(dic->di_mode, ARCH_CONVERT);
153 buf->bs_uid = INT_GET(dic->di_uid, ARCH_CONVERT);
154 buf->bs_gid = INT_GET(dic->di_gid, ARCH_CONVERT);
155 buf->bs_size = INT_GET(dic->di_size, ARCH_CONVERT);
156 buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, ARCH_CONVERT);
157 buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, ARCH_CONVERT);
158 buf->bs_mtime.tv_sec = INT_GET(dic->di_mtime.t_sec, ARCH_CONVERT);
159 buf->bs_mtime.tv_nsec = INT_GET(dic->di_mtime.t_nsec, ARCH_CONVERT);
160 buf->bs_ctime.tv_sec = INT_GET(dic->di_ctime.t_sec, ARCH_CONVERT);
161 buf->bs_ctime.tv_nsec = INT_GET(dic->di_ctime.t_nsec, ARCH_CONVERT);
162 buf->bs_xflags = xfs_dic2xflags(dic);
163 buf->bs_extsize = INT_GET(dic->di_extsize, ARCH_CONVERT) << mp->m_sb.sb_blocklog;
164 buf->bs_extents = INT_GET(dic->di_nextents, ARCH_CONVERT);
165 buf->bs_gen = INT_GET(dic->di_gen, ARCH_CONVERT);
166 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
167 buf->bs_dmevmask = INT_GET(dic->di_dmevmask, ARCH_CONVERT);
168 buf->bs_dmstate = INT_GET(dic->di_dmstate, ARCH_CONVERT);
169 buf->bs_aextents = INT_GET(dic->di_anextents, ARCH_CONVERT);
171 switch (INT_GET(dic->di_format, ARCH_CONVERT)) {
172 case XFS_DINODE_FMT_DEV:
173 buf->bs_rdev = INT_GET(dip->di_u.di_dev, ARCH_CONVERT);
174 buf->bs_blksize = BLKDEV_IOSIZE;
177 case XFS_DINODE_FMT_LOCAL:
178 case XFS_DINODE_FMT_UUID:
180 buf->bs_blksize = mp->m_sb.sb_blocksize;
183 case XFS_DINODE_FMT_EXTENTS:
184 case XFS_DINODE_FMT_BTREE:
186 buf->bs_blksize = mp->m_sb.sb_blocksize;
187 buf->bs_blocks = INT_GET(dic->di_nblocks, ARCH_CONVERT);
195 * Return stat information for one inode.
196 * Return 0 if ok, else errno.
198 int /* error status */
200 xfs_mount_t *mp, /* mount point for filesystem */
201 xfs_ino_t ino, /* inode number to get data for */
202 void __user *buffer, /* buffer to place output in */
203 int ubsize, /* size of buffer */
204 void *private_data, /* my private data */
205 xfs_daddr_t bno, /* starting bno of inode cluster */
206 int *ubused, /* bytes used by me */
207 void *dibuff, /* on-disk inode buffer */
208 int *stat) /* BULKSTAT_RV_... */
210 xfs_bstat_t *buf; /* return buffer */
211 int error = 0; /* error value */
212 xfs_dinode_t *dip; /* dinode inode pointer */
214 dip = (xfs_dinode_t *)dibuff;
216 if (!buffer || ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
217 (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
218 (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))) {
219 *stat = BULKSTAT_RV_NOTHING;
220 return XFS_ERROR(EINVAL);
222 if (ubsize < sizeof(*buf)) {
223 *stat = BULKSTAT_RV_NOTHING;
224 return XFS_ERROR(ENOMEM);
227 buf = kmem_alloc(sizeof(*buf), KM_SLEEP);
230 /* We're not being passed a pointer to a dinode. This happens
231 * if BULKSTAT_FG_IGET is selected. Do the iget.
233 error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat);
237 xfs_bulkstat_one_dinode(mp, ino, dip, buf);
240 if (copy_to_user(buffer, buf, sizeof(*buf))) {
241 *stat = BULKSTAT_RV_NOTHING;
246 *stat = BULKSTAT_RV_DIDONE;
248 *ubused = sizeof(*buf);
251 kmem_free(buf, sizeof(*buf));
256 * Test to see whether we can use the ondisk inode directly, based
257 * on the given bulkstat flags, filling in dipp accordingly.
258 * Returns zero if the inode is dodgey.
261 xfs_bulkstat_use_dinode(
269 unsigned int aformat;
272 if (!bp || (flags & BULKSTAT_FG_IGET))
274 dip = (xfs_dinode_t *)
275 xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog);
276 if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC ||
277 !XFS_DINODE_GOOD_VERSION(
278 INT_GET(dip->di_core.di_version, ARCH_CONVERT)))
280 if (flags & BULKSTAT_FG_QUICK) {
284 /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */
285 aformat = INT_GET(dip->di_core.di_aformat, ARCH_CONVERT);
286 if ((XFS_CFORK_Q(&dip->di_core) == 0) ||
287 (aformat == XFS_DINODE_FMT_LOCAL) ||
288 (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_core.di_anextents)) {
296 * Return stat information in bulk (by-inode) for the filesystem.
298 int /* error status */
300 xfs_mount_t *mp, /* mount point for filesystem */
301 xfs_ino_t *lastinop, /* last inode returned */
302 int *ubcountp, /* size of buffer/count returned */
303 bulkstat_one_pf formatter, /* func that'd fill a single buf */
304 void *private_data,/* private data for formatter */
305 size_t statstruct_size, /* sizeof struct filling */
306 char __user *ubuffer, /* buffer with inode stats */
307 int flags, /* defined in xfs_itable.h */
308 int *done) /* 1 if there are more stats to get */
310 xfs_agblock_t agbno=0;/* allocation group block number */
311 xfs_buf_t *agbp; /* agi header buffer */
312 xfs_agi_t *agi; /* agi header data */
313 xfs_agino_t agino; /* inode # in allocation group */
314 xfs_agnumber_t agno; /* allocation group number */
315 xfs_daddr_t bno; /* inode cluster start daddr */
316 int chunkidx; /* current index into inode chunk */
317 int clustidx; /* current index into inode cluster */
318 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
319 int end_of_ag; /* set if we've seen the ag end */
320 int error; /* error code */
321 int fmterror;/* bulkstat formatter result */
322 __int32_t gcnt; /* current btree rec's count */
323 xfs_inofree_t gfree; /* current btree rec's free mask */
324 xfs_agino_t gino; /* current btree rec's start inode */
325 int i; /* loop index */
326 int icount; /* count of inodes good in irbuf */
327 xfs_ino_t ino; /* inode number (filesystem) */
328 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
329 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
330 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
331 xfs_ino_t lastino=0; /* last inode number returned */
332 int nbcluster; /* # of blocks in a cluster */
333 int nicluster; /* # of inodes in a cluster */
334 int nimask; /* mask for inode clusters */
335 int nirbuf; /* size of irbuf */
336 int rval; /* return value error code */
337 int tmp; /* result value from btree calls */
338 int ubcount; /* size of user's buffer */
339 int ubleft; /* bytes left in user's buffer */
340 char __user *ubufp; /* pointer into user's buffer */
341 int ubelem; /* spaces used in user's buffer */
342 int ubused; /* bytes used by formatter */
343 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
344 xfs_dinode_t *dip; /* ptr into bp for specific inode */
345 xfs_inode_t *ip; /* ptr to in-core inode struct */
348 * Get the last inode value, see if there's nothing to do.
350 ino = (xfs_ino_t)*lastinop;
352 agno = XFS_INO_TO_AGNO(mp, ino);
353 agino = XFS_INO_TO_AGINO(mp, ino);
354 if (agno >= mp->m_sb.sb_agcount ||
355 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
360 ubcount = *ubcountp; /* statstruct's */
361 ubleft = ubcount * statstruct_size; /* bytes */
362 *ubcountp = ubelem = 0;
366 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
367 mp->m_sb.sb_inopblock :
368 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
369 nimask = ~(nicluster - 1);
370 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
372 * Allocate a page-sized buffer for inode btree records.
373 * We could try allocating something smaller, but for normal
374 * calls we'll always (potentially) need the whole page.
376 irbuf = kmem_alloc(NBPC, KM_SLEEP);
377 nirbuf = NBPC / sizeof(*irbuf);
379 * Loop over the allocation groups, starting from the last
380 * inode returned; 0 means start of the allocation group.
383 while (ubleft >= statstruct_size && agno < mp->m_sb.sb_agcount) {
385 down_read(&mp->m_peraglock);
386 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
387 up_read(&mp->m_peraglock);
390 * Skip this allocation group and go to the next one.
396 agi = XFS_BUF_TO_AGI(agbp);
398 * Allocate and initialize a btree cursor for ialloc btree.
400 cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO,
401 (xfs_inode_t *)0, 0);
403 irbufend = irbuf + nirbuf;
406 * If we're returning in the middle of an allocation group,
407 * we need to get the remainder of the chunk we're in.
411 * Lookup the inode chunk that this inode lives in.
413 error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
414 if (!error && /* no I/O error */
415 tmp && /* lookup succeeded */
416 /* got the record, should always work */
417 !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
420 /* this is the right chunk */
421 agino < gino + XFS_INODES_PER_CHUNK &&
422 /* lastino was not last in chunk */
423 (chunkidx = agino - gino + 1) <
424 XFS_INODES_PER_CHUNK &&
425 /* there are some left allocated */
426 XFS_INOBT_MASKN(chunkidx,
427 XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
429 * Grab the chunk record. Mark all the
430 * uninteresting inodes (because they're
431 * before our start point) free.
433 for (i = 0; i < chunkidx; i++) {
434 if (XFS_INOBT_MASK(i) & ~gfree)
437 gfree |= XFS_INOBT_MASKN(0, chunkidx);
438 irbp->ir_startino = gino;
439 irbp->ir_freecount = gcnt;
440 irbp->ir_free = gfree;
442 agino = gino + XFS_INODES_PER_CHUNK;
443 icount = XFS_INODES_PER_CHUNK - gcnt;
446 * If any of those tests failed, bump the
447 * inode number (just in case).
453 * In any case, increment to the next record.
456 error = xfs_inobt_increment(cur, 0, &tmp);
459 * Start of ag. Lookup the first inode chunk.
461 error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
465 * Loop through inode btree records in this ag,
466 * until we run out of inodes or space in the buffer.
468 while (irbp < irbufend && icount < ubcount) {
470 * Loop as long as we're unable to read the
474 agino += XFS_INODES_PER_CHUNK;
475 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
476 be32_to_cpu(agi->agi_length))
478 error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
482 * If ran off the end of the ag either with an error,
483 * or the normal way, set end and stop collecting.
486 (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
493 * If this chunk has any allocated inodes, save it.
494 * Also start read-ahead now for this chunk.
496 if (gcnt < XFS_INODES_PER_CHUNK) {
498 * Loop over all clusters in the next chunk.
499 * Do a readahead if there are any allocated
500 * inodes in that cluster.
502 for (agbno = XFS_AGINO_TO_AGBNO(mp, gino),
504 chunkidx < XFS_INODES_PER_CHUNK;
505 chunkidx += nicluster,
506 agbno += nbcluster) {
507 if (XFS_INOBT_MASKN(chunkidx,
509 xfs_btree_reada_bufs(mp, agno,
512 irbp->ir_startino = gino;
513 irbp->ir_freecount = gcnt;
514 irbp->ir_free = gfree;
516 icount += XFS_INODES_PER_CHUNK - gcnt;
519 * Set agino to after this chunk and bump the cursor.
521 agino = gino + XFS_INODES_PER_CHUNK;
522 error = xfs_inobt_increment(cur, 0, &tmp);
525 * Drop the btree buffers and the agi buffer.
526 * We can't hold any of the locks these represent
529 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
532 * Now format all the good inodes into the user's buffer.
536 irbp < irbufend && ubleft >= statstruct_size; irbp++) {
538 * Now process this chunk of inodes.
540 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
542 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
543 chunkidx++, clustidx++, agino++) {
544 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
546 * Recompute agbno if this is the
547 * first inode of the cluster.
549 * Careful with clustidx. There can be
550 * multple clusters per chunk, a single
551 * cluster per chunk or a cluster that has
552 * inodes represented from several different
553 * chunks (if blocksize is large).
555 * Because of this, the starting clustidx is
556 * initialized to zero in this loop but must
557 * later be reset after reading in the cluster
560 if ((chunkidx & (nicluster - 1)) == 0) {
561 agbno = XFS_AGINO_TO_AGBNO(mp,
563 ((chunkidx & nimask) >>
564 mp->m_sb.sb_inopblog);
566 if (flags & (BULKSTAT_FG_QUICK |
567 BULKSTAT_FG_INLINE)) {
568 ino = XFS_AGINO_TO_INO(mp, agno,
570 bno = XFS_AGB_TO_DADDR(mp, agno,
574 * Get the inode cluster buffer
576 ASSERT(xfs_inode_zone != NULL);
577 ip = kmem_zone_zalloc(xfs_inode_zone,
583 error = xfs_itobp(mp, NULL, ip,
587 clustidx = ip->i_boffset / mp->m_sb.sb_inodesize;
588 kmem_zone_free(xfs_inode_zone, ip);
589 if (XFS_TEST_ERROR(error != 0,
590 mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
591 XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
600 * Skip if this inode is free.
602 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
605 * Count used inodes as free so we can tell
606 * when the chunk is used up.
608 irbp->ir_freecount++;
609 ino = XFS_AGINO_TO_INO(mp, agno, agino);
610 bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
611 if (!xfs_bulkstat_use_dinode(mp, flags, bp,
615 * If we need to do an iget, cannot hold bp.
616 * Drop it, until starting the next cluster.
618 if ((flags & BULKSTAT_FG_INLINE) && !dip) {
625 * Get the inode and fill in a single buffer.
626 * BULKSTAT_FG_QUICK uses dip to fill it in.
627 * BULKSTAT_FG_IGET uses igets.
628 * BULKSTAT_FG_INLINE uses dip if we have an
629 * inline attr fork, else igets.
630 * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
631 * This is also used to count inodes/blks, etc
632 * in xfs_qm_quotacheck.
634 ubused = statstruct_size;
635 error = formatter(mp, ino, ubufp,
636 ubleft, private_data,
637 bno, &ubused, dip, &fmterror);
638 if (fmterror == BULKSTAT_RV_NOTHING) {
643 if (fmterror == BULKSTAT_RV_GIVEUP) {
661 * Set up for the next loop iteration.
668 agino = XFS_INO_TO_AGINO(mp, lastino);
673 * Done, we're either out of filesystem or space to put the data.
675 kmem_free(irbuf, NBPC);
677 if (agno >= mp->m_sb.sb_agcount) {
679 * If we ran out of filesystem, mark lastino as off
680 * the end of the filesystem, so the next call
681 * will return immediately.
683 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
686 *lastinop = (xfs_ino_t)lastino;
692 * Return stat information in bulk (by-inode) for the filesystem.
693 * Special case for non-sequential one inode bulkstat.
695 int /* error status */
697 xfs_mount_t *mp, /* mount point for filesystem */
698 xfs_ino_t *lastinop, /* inode to return */
699 char __user *buffer, /* buffer with inode stats */
700 int *done) /* 1 if there are more stats to get */
702 int count; /* count value for bulkstat call */
703 int error; /* return value */
704 xfs_ino_t ino; /* filesystem inode number */
705 int res; /* result from bs1 */
708 * note that requesting valid inode numbers which are not allocated
709 * to inodes will most likely cause xfs_itobp to generate warning
710 * messages about bad magic numbers. This is ok. The fact that
711 * the inode isn't actually an inode is handled by the
712 * error check below. Done this way to make the usual case faster
713 * at the expense of the error case.
716 ino = (xfs_ino_t)*lastinop;
717 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
718 NULL, 0, NULL, NULL, &res);
721 * Special case way failed, do it the "long" way
722 * to see if that works.
726 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
727 NULL, sizeof(xfs_bstat_t), buffer,
728 BULKSTAT_FG_IGET, done))
730 if (count == 0 || (xfs_ino_t)*lastinop != ino)
731 return error == EFSCORRUPTED ?
732 XFS_ERROR(EINVAL) : error;
741 * Return inode number table for the filesystem.
743 int /* error status */
745 xfs_mount_t *mp, /* mount point for filesystem */
746 xfs_ino_t *lastino, /* last inode returned */
747 int *count, /* size of buffer/count returned */
748 xfs_inogrp_t __user *ubuffer)/* buffer with inode descriptions */
754 xfs_inogrp_t *buffer;
756 xfs_btree_cur_t *cur;
766 ino = (xfs_ino_t)*lastino;
767 agno = XFS_INO_TO_AGNO(mp, ino);
768 agino = XFS_INO_TO_AGINO(mp, ino);
771 bcount = MIN(left, (int)(NBPP / sizeof(*buffer)));
772 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
776 while (left > 0 && agno < mp->m_sb.sb_agcount) {
778 down_read(&mp->m_peraglock);
779 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
780 up_read(&mp->m_peraglock);
783 * If we can't read the AGI of this ag,
784 * then just skip to the next one.
792 cur = xfs_btree_init_cursor(mp, NULL, agbp, agno,
793 XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
794 error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
796 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
801 * Move up the the last inode in the current
802 * chunk. The lookup_ge will always get
803 * us the first inode in the next chunk.
805 agino += XFS_INODES_PER_CHUNK - 1;
809 if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
814 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
820 agino = gino + XFS_INODES_PER_CHUNK - 1;
821 buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
822 buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
823 buffer[bufidx].xi_allocmask = ~gfree;
826 if (bufidx == bcount) {
827 if (copy_to_user(ubuffer, buffer,
828 bufidx * sizeof(*buffer))) {
829 error = XFS_ERROR(EFAULT);
837 error = xfs_inobt_increment(cur, 0, &tmp);
839 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
844 * The agino value has already been bumped.
845 * Just try to skip up to it.
847 agino += XFS_INODES_PER_CHUNK;
854 if (copy_to_user(ubuffer, buffer,
855 bufidx * sizeof(*buffer)))
856 error = XFS_ERROR(EFAULT);
860 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
862 kmem_free(buffer, bcount * sizeof(*buffer));
864 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :