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"
47 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
48 (xfs_sb_version_hasquota(&mp->m_sb) &&
49 (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino)));
53 xfs_bulkstat_one_iget(
54 xfs_mount_t *mp, /* mount point for filesystem */
55 xfs_ino_t ino, /* inode number to get data for */
56 xfs_daddr_t bno, /* starting bno of inode cluster */
57 xfs_bstat_t *buf, /* return buffer */
58 int *stat) /* BULKSTAT_RV_... */
60 xfs_icdinode_t *dic; /* dinode core info pointer */
61 xfs_inode_t *ip; /* incore inode pointer */
64 error = xfs_iget(mp, NULL, ino,
65 XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno);
67 *stat = BULKSTAT_RV_NOTHING;
72 ASSERT(ip->i_blkno != (xfs_daddr_t)0);
76 /* xfs_iget returns the following without needing
79 buf->bs_nlink = dic->di_nlink;
80 buf->bs_projid = dic->di_projid;
82 buf->bs_mode = dic->di_mode;
83 buf->bs_uid = dic->di_uid;
84 buf->bs_gid = dic->di_gid;
85 buf->bs_size = dic->di_size;
86 vn_atime_to_bstime(VFS_I(ip), &buf->bs_atime);
87 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
88 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
89 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
90 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
91 buf->bs_xflags = xfs_ip2xflags(ip);
92 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
93 buf->bs_extents = dic->di_nextents;
94 buf->bs_gen = dic->di_gen;
95 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
96 buf->bs_dmevmask = dic->di_dmevmask;
97 buf->bs_dmstate = dic->di_dmstate;
98 buf->bs_aextents = dic->di_anextents;
100 switch (dic->di_format) {
101 case XFS_DINODE_FMT_DEV:
102 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
103 buf->bs_blksize = BLKDEV_IOSIZE;
106 case XFS_DINODE_FMT_LOCAL:
107 case XFS_DINODE_FMT_UUID:
109 buf->bs_blksize = mp->m_sb.sb_blocksize;
112 case XFS_DINODE_FMT_EXTENTS:
113 case XFS_DINODE_FMT_BTREE:
115 buf->bs_blksize = mp->m_sb.sb_blocksize;
116 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
120 xfs_iput(ip, XFS_ILOCK_SHARED);
125 xfs_bulkstat_one_dinode(
126 xfs_mount_t *mp, /* mount point for filesystem */
127 xfs_ino_t ino, /* inode number to get data for */
128 xfs_dinode_t *dip, /* dinode inode pointer */
129 xfs_bstat_t *buf) /* return buffer */
131 xfs_dinode_core_t *dic; /* dinode core info pointer */
136 * The inode format changed when we moved the link count and
137 * made it 32 bits long. If this is an old format inode,
138 * convert it in memory to look like a new one. If it gets
139 * flushed to disk we will convert back before flushing or
140 * logging it. We zero out the new projid field and the old link
141 * count field. We'll handle clearing the pad field (the remains
142 * of the old uuid field) when we actually convert the inode to
143 * the new format. We don't change the version number so that we
144 * can distinguish this from a real new format inode.
146 if (dic->di_version == XFS_DINODE_VERSION_1) {
147 buf->bs_nlink = be16_to_cpu(dic->di_onlink);
150 buf->bs_nlink = be32_to_cpu(dic->di_nlink);
151 buf->bs_projid = be16_to_cpu(dic->di_projid);
155 buf->bs_mode = be16_to_cpu(dic->di_mode);
156 buf->bs_uid = be32_to_cpu(dic->di_uid);
157 buf->bs_gid = be32_to_cpu(dic->di_gid);
158 buf->bs_size = be64_to_cpu(dic->di_size);
159 buf->bs_atime.tv_sec = be32_to_cpu(dic->di_atime.t_sec);
160 buf->bs_atime.tv_nsec = be32_to_cpu(dic->di_atime.t_nsec);
161 buf->bs_mtime.tv_sec = be32_to_cpu(dic->di_mtime.t_sec);
162 buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec);
163 buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec);
164 buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec);
165 buf->bs_xflags = xfs_dic2xflags(dip);
166 buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog;
167 buf->bs_extents = be32_to_cpu(dic->di_nextents);
168 buf->bs_gen = be32_to_cpu(dic->di_gen);
169 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
170 buf->bs_dmevmask = be32_to_cpu(dic->di_dmevmask);
171 buf->bs_dmstate = be16_to_cpu(dic->di_dmstate);
172 buf->bs_aextents = be16_to_cpu(dic->di_anextents);
174 switch (dic->di_format) {
175 case XFS_DINODE_FMT_DEV:
176 buf->bs_rdev = be32_to_cpu(dip->di_u.di_dev);
177 buf->bs_blksize = BLKDEV_IOSIZE;
180 case XFS_DINODE_FMT_LOCAL:
181 case XFS_DINODE_FMT_UUID:
183 buf->bs_blksize = mp->m_sb.sb_blocksize;
186 case XFS_DINODE_FMT_EXTENTS:
187 case XFS_DINODE_FMT_BTREE:
189 buf->bs_blksize = mp->m_sb.sb_blocksize;
190 buf->bs_blocks = be64_to_cpu(dic->di_nblocks);
196 xfs_bulkstat_one_fmt(
197 void __user *ubuffer,
198 const xfs_bstat_t *buffer)
200 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
202 return sizeof(*buffer);
206 * Return stat information for one inode.
207 * Return 0 if ok, else errno.
209 int /* error status */
211 xfs_mount_t *mp, /* mount point for filesystem */
212 xfs_ino_t ino, /* inode number to get data for */
213 void __user *buffer, /* buffer to place output in */
214 int ubsize, /* size of buffer */
215 void *private_data, /* my private data */
216 xfs_daddr_t bno, /* starting bno of inode cluster */
217 int *ubused, /* bytes used by me */
218 void *dibuff, /* on-disk inode buffer */
219 int *stat) /* BULKSTAT_RV_... */
221 xfs_bstat_t *buf; /* return buffer */
222 int error = 0; /* error value */
223 xfs_dinode_t *dip; /* dinode inode pointer */
224 bulkstat_one_fmt_pf formatter = private_data ? : xfs_bulkstat_one_fmt;
226 dip = (xfs_dinode_t *)dibuff;
227 *stat = BULKSTAT_RV_NOTHING;
229 if (!buffer || xfs_internal_inum(mp, ino))
230 return XFS_ERROR(EINVAL);
231 if (ubsize < sizeof(*buf))
232 return XFS_ERROR(ENOMEM);
234 buf = kmem_alloc(sizeof(*buf), KM_SLEEP);
237 /* We're not being passed a pointer to a dinode. This happens
238 * if BULKSTAT_FG_IGET is selected. Do the iget.
240 error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat);
244 xfs_bulkstat_one_dinode(mp, ino, dip, buf);
247 error = formatter(buffer, buf);
253 *stat = BULKSTAT_RV_DIDONE;
263 * Test to see whether we can use the ondisk inode directly, based
264 * on the given bulkstat flags, filling in dipp accordingly.
265 * Returns zero if the inode is dodgey.
268 xfs_bulkstat_use_dinode(
276 unsigned int aformat;
279 if (!bp || (flags & BULKSTAT_FG_IGET))
281 dip = (xfs_dinode_t *)
282 xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog);
284 * Check the buffer containing the on-disk inode for di_mode == 0.
285 * This is to prevent xfs_bulkstat from picking up just reclaimed
286 * inodes that have their in-core state initialized but not flushed
287 * to disk yet. This is a temporary hack that would require a proper
290 if (be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC ||
291 !XFS_DINODE_GOOD_VERSION(dip->di_core.di_version) ||
292 !dip->di_core.di_mode)
294 if (flags & BULKSTAT_FG_QUICK) {
298 /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */
299 aformat = dip->di_core.di_aformat;
300 if ((XFS_DFORK_Q(dip) == 0) ||
301 (aformat == XFS_DINODE_FMT_LOCAL) ||
302 (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_core.di_anextents)) {
309 #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
312 * Return stat information in bulk (by-inode) for the filesystem.
314 int /* error status */
316 xfs_mount_t *mp, /* mount point for filesystem */
317 xfs_ino_t *lastinop, /* last inode returned */
318 int *ubcountp, /* size of buffer/count returned */
319 bulkstat_one_pf formatter, /* func that'd fill a single buf */
320 void *private_data,/* private data for formatter */
321 size_t statstruct_size, /* sizeof struct filling */
322 char __user *ubuffer, /* buffer with inode stats */
323 int flags, /* defined in xfs_itable.h */
324 int *done) /* 1 if there are more stats to get */
326 xfs_agblock_t agbno=0;/* allocation group block number */
327 xfs_buf_t *agbp; /* agi header buffer */
328 xfs_agi_t *agi; /* agi header data */
329 xfs_agino_t agino; /* inode # in allocation group */
330 xfs_agnumber_t agno; /* allocation group number */
331 xfs_daddr_t bno; /* inode cluster start daddr */
332 int chunkidx; /* current index into inode chunk */
333 int clustidx; /* current index into inode cluster */
334 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
335 int end_of_ag; /* set if we've seen the ag end */
336 int error; /* error code */
337 int fmterror;/* bulkstat formatter result */
338 __int32_t gcnt; /* current btree rec's count */
339 xfs_inofree_t gfree; /* current btree rec's free mask */
340 xfs_agino_t gino; /* current btree rec's start inode */
341 int i; /* loop index */
342 int icount; /* count of inodes good in irbuf */
343 size_t irbsize; /* size of irec buffer in bytes */
344 xfs_ino_t ino; /* inode number (filesystem) */
345 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
346 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
347 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
348 xfs_ino_t lastino; /* last inode number returned */
349 int nbcluster; /* # of blocks in a cluster */
350 int nicluster; /* # of inodes in a cluster */
351 int nimask; /* mask for inode clusters */
352 int nirbuf; /* size of irbuf */
353 int rval; /* return value error code */
354 int tmp; /* result value from btree calls */
355 int ubcount; /* size of user's buffer */
356 int ubleft; /* bytes left in user's buffer */
357 char __user *ubufp; /* pointer into user's buffer */
358 int ubelem; /* spaces used in user's buffer */
359 int ubused; /* bytes used by formatter */
360 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
361 xfs_dinode_t *dip; /* ptr into bp for specific inode */
364 * Get the last inode value, see if there's nothing to do.
366 ino = (xfs_ino_t)*lastinop;
369 agno = XFS_INO_TO_AGNO(mp, ino);
370 agino = XFS_INO_TO_AGINO(mp, ino);
371 if (agno >= mp->m_sb.sb_agcount ||
372 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
377 if (!ubcountp || *ubcountp <= 0) {
380 ubcount = *ubcountp; /* statstruct's */
381 ubleft = ubcount * statstruct_size; /* bytes */
382 *ubcountp = ubelem = 0;
386 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
387 mp->m_sb.sb_inopblock :
388 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
389 nimask = ~(nicluster - 1);
390 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
391 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4,
392 KM_SLEEP | KM_MAYFAIL | KM_LARGE);
393 nirbuf = irbsize / sizeof(*irbuf);
396 * Loop over the allocation groups, starting from the last
397 * inode returned; 0 means start of the allocation group.
400 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
403 down_read(&mp->m_peraglock);
404 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
405 up_read(&mp->m_peraglock);
408 * Skip this allocation group and go to the next one.
414 agi = XFS_BUF_TO_AGI(agbp);
416 * Allocate and initialize a btree cursor for ialloc btree.
418 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
420 irbufend = irbuf + nirbuf;
423 * If we're returning in the middle of an allocation group,
424 * we need to get the remainder of the chunk we're in.
428 * Lookup the inode chunk that this inode lives in.
430 error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
431 if (!error && /* no I/O error */
432 tmp && /* lookup succeeded */
433 /* got the record, should always work */
434 !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
437 /* this is the right chunk */
438 agino < gino + XFS_INODES_PER_CHUNK &&
439 /* lastino was not last in chunk */
440 (chunkidx = agino - gino + 1) <
441 XFS_INODES_PER_CHUNK &&
442 /* there are some left allocated */
443 XFS_INOBT_MASKN(chunkidx,
444 XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
446 * Grab the chunk record. Mark all the
447 * uninteresting inodes (because they're
448 * before our start point) free.
450 for (i = 0; i < chunkidx; i++) {
451 if (XFS_INOBT_MASK(i) & ~gfree)
454 gfree |= XFS_INOBT_MASKN(0, chunkidx);
455 irbp->ir_startino = gino;
456 irbp->ir_freecount = gcnt;
457 irbp->ir_free = gfree;
459 agino = gino + XFS_INODES_PER_CHUNK;
460 icount = XFS_INODES_PER_CHUNK - gcnt;
463 * If any of those tests failed, bump the
464 * inode number (just in case).
470 * In any case, increment to the next record.
473 error = xfs_btree_increment(cur, 0, &tmp);
476 * Start of ag. Lookup the first inode chunk.
478 error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
482 * Loop through inode btree records in this ag,
483 * until we run out of inodes or space in the buffer.
485 while (irbp < irbufend && icount < ubcount) {
487 * Loop as long as we're unable to read the
491 agino += XFS_INODES_PER_CHUNK;
492 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
493 be32_to_cpu(agi->agi_length))
495 error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
500 * If ran off the end of the ag either with an error,
501 * or the normal way, set end and stop collecting.
504 (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
511 * If this chunk has any allocated inodes, save it.
512 * Also start read-ahead now for this chunk.
514 if (gcnt < XFS_INODES_PER_CHUNK) {
516 * Loop over all clusters in the next chunk.
517 * Do a readahead if there are any allocated
518 * inodes in that cluster.
520 for (agbno = XFS_AGINO_TO_AGBNO(mp, gino),
522 chunkidx < XFS_INODES_PER_CHUNK;
523 chunkidx += nicluster,
524 agbno += nbcluster) {
525 if (XFS_INOBT_MASKN(chunkidx,
527 xfs_btree_reada_bufs(mp, agno,
530 irbp->ir_startino = gino;
531 irbp->ir_freecount = gcnt;
532 irbp->ir_free = gfree;
534 icount += XFS_INODES_PER_CHUNK - gcnt;
537 * Set agino to after this chunk and bump the cursor.
539 agino = gino + XFS_INODES_PER_CHUNK;
540 error = xfs_btree_increment(cur, 0, &tmp);
544 * Drop the btree buffers and the agi buffer.
545 * We can't hold any of the locks these represent
548 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
551 * Now format all the good inodes into the user's buffer.
555 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
557 * Now process this chunk of inodes.
559 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
560 XFS_BULKSTAT_UBLEFT(ubleft) &&
561 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
562 chunkidx++, clustidx++, agino++) {
563 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
565 * Recompute agbno if this is the
566 * first inode of the cluster.
568 * Careful with clustidx. There can be
569 * multple clusters per chunk, a single
570 * cluster per chunk or a cluster that has
571 * inodes represented from several different
572 * chunks (if blocksize is large).
574 * Because of this, the starting clustidx is
575 * initialized to zero in this loop but must
576 * later be reset after reading in the cluster
579 if ((chunkidx & (nicluster - 1)) == 0) {
580 agbno = XFS_AGINO_TO_AGBNO(mp,
582 ((chunkidx & nimask) >>
583 mp->m_sb.sb_inopblog);
585 if (flags & (BULKSTAT_FG_QUICK |
586 BULKSTAT_FG_INLINE)) {
589 ino = XFS_AGINO_TO_INO(mp, agno,
591 bno = XFS_AGB_TO_DADDR(mp, agno,
595 * Get the inode cluster buffer
600 error = xfs_inotobp(mp, NULL, ino, &dip,
605 clustidx = offset / mp->m_sb.sb_inodesize;
606 if (XFS_TEST_ERROR(error != 0,
607 mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
608 XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
616 ino = XFS_AGINO_TO_INO(mp, agno, agino);
617 bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
619 * Skip if this inode is free.
621 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
626 * Count used inodes as free so we can tell
627 * when the chunk is used up.
629 irbp->ir_freecount++;
630 if (!xfs_bulkstat_use_dinode(mp, flags, bp,
636 * If we need to do an iget, cannot hold bp.
637 * Drop it, until starting the next cluster.
639 if ((flags & BULKSTAT_FG_INLINE) && !dip) {
646 * Get the inode and fill in a single buffer.
647 * BULKSTAT_FG_QUICK uses dip to fill it in.
648 * BULKSTAT_FG_IGET uses igets.
649 * BULKSTAT_FG_INLINE uses dip if we have an
650 * inline attr fork, else igets.
651 * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
652 * This is also used to count inodes/blks, etc
653 * in xfs_qm_quotacheck.
655 ubused = statstruct_size;
656 error = formatter(mp, ino, ubufp,
657 ubleft, private_data,
658 bno, &ubused, dip, &fmterror);
659 if (fmterror == BULKSTAT_RV_NOTHING) {
660 if (error && error != ENOENT &&
669 if (fmterror == BULKSTAT_RV_GIVEUP) {
689 * Set up for the next loop iteration.
691 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
696 agino = XFS_INO_TO_AGINO(mp, lastino);
701 * Done, we're either out of filesystem or space to put the data.
706 * Found some inodes, return them now and return the error next time.
710 if (agno >= mp->m_sb.sb_agcount) {
712 * If we ran out of filesystem, mark lastino as off
713 * the end of the filesystem, so the next call
714 * will return immediately.
716 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
719 *lastinop = (xfs_ino_t)lastino;
725 * Return stat information in bulk (by-inode) for the filesystem.
726 * Special case for non-sequential one inode bulkstat.
728 int /* error status */
730 xfs_mount_t *mp, /* mount point for filesystem */
731 xfs_ino_t *lastinop, /* inode to return */
732 char __user *buffer, /* buffer with inode stats */
733 int *done) /* 1 if there are more stats to get */
735 int count; /* count value for bulkstat call */
736 int error; /* return value */
737 xfs_ino_t ino; /* filesystem inode number */
738 int res; /* result from bs1 */
741 * note that requesting valid inode numbers which are not allocated
742 * to inodes will most likely cause xfs_itobp to generate warning
743 * messages about bad magic numbers. This is ok. The fact that
744 * the inode isn't actually an inode is handled by the
745 * error check below. Done this way to make the usual case faster
746 * at the expense of the error case.
749 ino = (xfs_ino_t)*lastinop;
750 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
751 NULL, 0, NULL, NULL, &res);
754 * Special case way failed, do it the "long" way
755 * to see if that works.
759 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
760 NULL, sizeof(xfs_bstat_t), buffer,
761 BULKSTAT_FG_IGET, done))
763 if (count == 0 || (xfs_ino_t)*lastinop != ino)
764 return error == EFSCORRUPTED ?
765 XFS_ERROR(EINVAL) : error;
775 void __user *ubuffer, /* buffer to write to */
776 const xfs_inogrp_t *buffer, /* buffer to read from */
777 long count, /* # of elements to read */
778 long *written) /* # of bytes written */
780 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
782 *written = count * sizeof(*buffer);
787 * Return inode number table for the filesystem.
789 int /* error status */
791 xfs_mount_t *mp, /* mount point for filesystem */
792 xfs_ino_t *lastino, /* last inode returned */
793 int *count, /* size of buffer/count returned */
794 void __user *ubuffer,/* buffer with inode descriptions */
795 inumbers_fmt_pf formatter)
801 xfs_inogrp_t *buffer;
803 xfs_btree_cur_t *cur;
813 ino = (xfs_ino_t)*lastino;
814 agno = XFS_INO_TO_AGNO(mp, ino);
815 agino = XFS_INO_TO_AGINO(mp, ino);
818 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
819 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
823 while (left > 0 && agno < mp->m_sb.sb_agcount) {
825 down_read(&mp->m_peraglock);
826 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
827 up_read(&mp->m_peraglock);
830 * If we can't read the AGI of this ag,
831 * then just skip to the next one.
839 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
840 error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
842 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
847 * Move up the last inode in the current
848 * chunk. The lookup_ge will always get
849 * us the first inode in the next chunk.
851 agino += XFS_INODES_PER_CHUNK - 1;
855 if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
860 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
866 agino = gino + XFS_INODES_PER_CHUNK - 1;
867 buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
868 buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
869 buffer[bufidx].xi_allocmask = ~gfree;
872 if (bufidx == bcount) {
874 if (formatter(ubuffer, buffer, bufidx, &written)) {
875 error = XFS_ERROR(EFAULT);
883 error = xfs_btree_increment(cur, 0, &tmp);
885 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
890 * The agino value has already been bumped.
891 * Just try to skip up to it.
893 agino += XFS_INODES_PER_CHUNK;
901 if (formatter(ubuffer, buffer, bufidx, &written))
902 error = XFS_ERROR(EFAULT);
906 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
910 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :