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_imap.im_blkno != 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 *dic, /* dinode inode pointer */
129 xfs_bstat_t *buf) /* return buffer */
132 * The inode format changed when we moved the link count and
133 * made it 32 bits long. If this is an old format inode,
134 * convert it in memory to look like a new one. If it gets
135 * flushed to disk we will convert back before flushing or
136 * logging it. We zero out the new projid field and the old link
137 * count field. We'll handle clearing the pad field (the remains
138 * of the old uuid field) when we actually convert the inode to
139 * the new format. We don't change the version number so that we
140 * can distinguish this from a real new format inode.
142 if (dic->di_version == 1) {
143 buf->bs_nlink = be16_to_cpu(dic->di_onlink);
146 buf->bs_nlink = be32_to_cpu(dic->di_nlink);
147 buf->bs_projid = be16_to_cpu(dic->di_projid);
151 buf->bs_mode = be16_to_cpu(dic->di_mode);
152 buf->bs_uid = be32_to_cpu(dic->di_uid);
153 buf->bs_gid = be32_to_cpu(dic->di_gid);
154 buf->bs_size = be64_to_cpu(dic->di_size);
155 buf->bs_atime.tv_sec = be32_to_cpu(dic->di_atime.t_sec);
156 buf->bs_atime.tv_nsec = be32_to_cpu(dic->di_atime.t_nsec);
157 buf->bs_mtime.tv_sec = be32_to_cpu(dic->di_mtime.t_sec);
158 buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec);
159 buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec);
160 buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec);
161 buf->bs_xflags = xfs_dic2xflags(dic);
162 buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog;
163 buf->bs_extents = be32_to_cpu(dic->di_nextents);
164 buf->bs_gen = be32_to_cpu(dic->di_gen);
165 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
166 buf->bs_dmevmask = be32_to_cpu(dic->di_dmevmask);
167 buf->bs_dmstate = be16_to_cpu(dic->di_dmstate);
168 buf->bs_aextents = be16_to_cpu(dic->di_anextents);
170 switch (dic->di_format) {
171 case XFS_DINODE_FMT_DEV:
172 buf->bs_rdev = xfs_dinode_get_rdev(dic);
173 buf->bs_blksize = BLKDEV_IOSIZE;
176 case XFS_DINODE_FMT_LOCAL:
177 case XFS_DINODE_FMT_UUID:
179 buf->bs_blksize = mp->m_sb.sb_blocksize;
182 case XFS_DINODE_FMT_EXTENTS:
183 case XFS_DINODE_FMT_BTREE:
185 buf->bs_blksize = mp->m_sb.sb_blocksize;
186 buf->bs_blocks = be64_to_cpu(dic->di_nblocks);
192 xfs_bulkstat_one_fmt(
193 void __user *ubuffer,
194 const xfs_bstat_t *buffer)
196 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
198 return sizeof(*buffer);
202 * Return stat information for one inode.
203 * Return 0 if ok, else errno.
205 int /* error status */
206 xfs_bulkstat_one_int(
207 xfs_mount_t *mp, /* mount point for filesystem */
208 xfs_ino_t ino, /* inode number to get data for */
209 void __user *buffer, /* buffer to place output in */
210 int ubsize, /* size of buffer */
211 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
212 xfs_daddr_t bno, /* starting bno of inode cluster */
213 int *ubused, /* bytes used by me */
214 void *dibuff, /* on-disk inode buffer */
215 int *stat) /* BULKSTAT_RV_... */
217 xfs_bstat_t *buf; /* return buffer */
218 int error = 0; /* error value */
219 xfs_dinode_t *dip; /* dinode inode pointer */
221 dip = (xfs_dinode_t *)dibuff;
222 *stat = BULKSTAT_RV_NOTHING;
224 if (!buffer || xfs_internal_inum(mp, ino))
225 return XFS_ERROR(EINVAL);
226 if (ubsize < sizeof(*buf))
227 return XFS_ERROR(ENOMEM);
229 buf = kmem_alloc(sizeof(*buf), KM_SLEEP);
232 /* We're not being passed a pointer to a dinode. This happens
233 * if BULKSTAT_FG_IGET is selected. Do the iget.
235 error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat);
239 xfs_bulkstat_one_dinode(mp, ino, dip, buf);
242 error = formatter(buffer, buf);
248 *stat = BULKSTAT_RV_DIDONE;
259 xfs_mount_t *mp, /* mount point for filesystem */
260 xfs_ino_t ino, /* inode number to get data for */
261 void __user *buffer, /* buffer to place output in */
262 int ubsize, /* size of buffer */
263 void *private_data, /* my private data */
264 xfs_daddr_t bno, /* starting bno of inode cluster */
265 int *ubused, /* bytes used by me */
266 void *dibuff, /* on-disk inode buffer */
267 int *stat) /* BULKSTAT_RV_... */
269 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
270 xfs_bulkstat_one_fmt, bno,
271 ubused, dibuff, stat);
275 * Test to see whether we can use the ondisk inode directly, based
276 * on the given bulkstat flags, filling in dipp accordingly.
277 * Returns zero if the inode is dodgey.
280 xfs_bulkstat_use_dinode(
288 unsigned int aformat;
291 if (!bp || (flags & BULKSTAT_FG_IGET))
293 dip = (xfs_dinode_t *)
294 xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog);
296 * Check the buffer containing the on-disk inode for di_mode == 0.
297 * This is to prevent xfs_bulkstat from picking up just reclaimed
298 * inodes that have their in-core state initialized but not flushed
299 * to disk yet. This is a temporary hack that would require a proper
302 if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
303 !XFS_DINODE_GOOD_VERSION(dip->di_version) ||
306 if (flags & BULKSTAT_FG_QUICK) {
310 /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */
311 aformat = dip->di_aformat;
312 if ((XFS_DFORK_Q(dip) == 0) ||
313 (aformat == XFS_DINODE_FMT_LOCAL) ||
314 (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_anextents)) {
321 #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
324 * Return stat information in bulk (by-inode) for the filesystem.
326 int /* error status */
328 xfs_mount_t *mp, /* mount point for filesystem */
329 xfs_ino_t *lastinop, /* last inode returned */
330 int *ubcountp, /* size of buffer/count returned */
331 bulkstat_one_pf formatter, /* func that'd fill a single buf */
332 void *private_data,/* private data for formatter */
333 size_t statstruct_size, /* sizeof struct filling */
334 char __user *ubuffer, /* buffer with inode stats */
335 int flags, /* defined in xfs_itable.h */
336 int *done) /* 1 if there are more stats to get */
338 xfs_agblock_t agbno=0;/* allocation group block number */
339 xfs_buf_t *agbp; /* agi header buffer */
340 xfs_agi_t *agi; /* agi header data */
341 xfs_agino_t agino; /* inode # in allocation group */
342 xfs_agnumber_t agno; /* allocation group number */
343 xfs_daddr_t bno; /* inode cluster start daddr */
344 int chunkidx; /* current index into inode chunk */
345 int clustidx; /* current index into inode cluster */
346 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
347 int end_of_ag; /* set if we've seen the ag end */
348 int error; /* error code */
349 int fmterror;/* bulkstat formatter result */
350 __int32_t gcnt; /* current btree rec's count */
351 xfs_inofree_t gfree; /* current btree rec's free mask */
352 xfs_agino_t gino; /* current btree rec's start inode */
353 int i; /* loop index */
354 int icount; /* count of inodes good in irbuf */
355 size_t irbsize; /* size of irec buffer in bytes */
356 xfs_ino_t ino; /* inode number (filesystem) */
357 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
358 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
359 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
360 xfs_ino_t lastino; /* last inode number returned */
361 int nbcluster; /* # of blocks in a cluster */
362 int nicluster; /* # of inodes in a cluster */
363 int nimask; /* mask for inode clusters */
364 int nirbuf; /* size of irbuf */
365 int rval; /* return value error code */
366 int tmp; /* result value from btree calls */
367 int ubcount; /* size of user's buffer */
368 int ubleft; /* bytes left in user's buffer */
369 char __user *ubufp; /* pointer into user's buffer */
370 int ubelem; /* spaces used in user's buffer */
371 int ubused; /* bytes used by formatter */
372 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
373 xfs_dinode_t *dip; /* ptr into bp for specific inode */
376 * Get the last inode value, see if there's nothing to do.
378 ino = (xfs_ino_t)*lastinop;
381 agno = XFS_INO_TO_AGNO(mp, ino);
382 agino = XFS_INO_TO_AGINO(mp, ino);
383 if (agno >= mp->m_sb.sb_agcount ||
384 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
389 if (!ubcountp || *ubcountp <= 0) {
392 ubcount = *ubcountp; /* statstruct's */
393 ubleft = ubcount * statstruct_size; /* bytes */
394 *ubcountp = ubelem = 0;
398 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
399 mp->m_sb.sb_inopblock :
400 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
401 nimask = ~(nicluster - 1);
402 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
403 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4,
404 KM_SLEEP | KM_MAYFAIL | KM_LARGE);
405 nirbuf = irbsize / sizeof(*irbuf);
408 * Loop over the allocation groups, starting from the last
409 * inode returned; 0 means start of the allocation group.
412 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
415 down_read(&mp->m_peraglock);
416 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
417 up_read(&mp->m_peraglock);
420 * Skip this allocation group and go to the next one.
426 agi = XFS_BUF_TO_AGI(agbp);
428 * Allocate and initialize a btree cursor for ialloc btree.
430 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
432 irbufend = irbuf + nirbuf;
435 * If we're returning in the middle of an allocation group,
436 * we need to get the remainder of the chunk we're in.
440 * Lookup the inode chunk that this inode lives in.
442 error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
443 if (!error && /* no I/O error */
444 tmp && /* lookup succeeded */
445 /* got the record, should always work */
446 !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
449 /* this is the right chunk */
450 agino < gino + XFS_INODES_PER_CHUNK &&
451 /* lastino was not last in chunk */
452 (chunkidx = agino - gino + 1) <
453 XFS_INODES_PER_CHUNK &&
454 /* there are some left allocated */
455 XFS_INOBT_MASKN(chunkidx,
456 XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
458 * Grab the chunk record. Mark all the
459 * uninteresting inodes (because they're
460 * before our start point) free.
462 for (i = 0; i < chunkidx; i++) {
463 if (XFS_INOBT_MASK(i) & ~gfree)
466 gfree |= XFS_INOBT_MASKN(0, chunkidx);
467 irbp->ir_startino = gino;
468 irbp->ir_freecount = gcnt;
469 irbp->ir_free = gfree;
471 agino = gino + XFS_INODES_PER_CHUNK;
472 icount = XFS_INODES_PER_CHUNK - gcnt;
475 * If any of those tests failed, bump the
476 * inode number (just in case).
482 * In any case, increment to the next record.
485 error = xfs_btree_increment(cur, 0, &tmp);
488 * Start of ag. Lookup the first inode chunk.
490 error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
494 * Loop through inode btree records in this ag,
495 * until we run out of inodes or space in the buffer.
497 while (irbp < irbufend && icount < ubcount) {
499 * Loop as long as we're unable to read the
503 agino += XFS_INODES_PER_CHUNK;
504 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
505 be32_to_cpu(agi->agi_length))
507 error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
512 * If ran off the end of the ag either with an error,
513 * or the normal way, set end and stop collecting.
516 (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
523 * If this chunk has any allocated inodes, save it.
524 * Also start read-ahead now for this chunk.
526 if (gcnt < XFS_INODES_PER_CHUNK) {
528 * Loop over all clusters in the next chunk.
529 * Do a readahead if there are any allocated
530 * inodes in that cluster.
532 for (agbno = XFS_AGINO_TO_AGBNO(mp, gino),
534 chunkidx < XFS_INODES_PER_CHUNK;
535 chunkidx += nicluster,
536 agbno += nbcluster) {
537 if (XFS_INOBT_MASKN(chunkidx,
539 xfs_btree_reada_bufs(mp, agno,
542 irbp->ir_startino = gino;
543 irbp->ir_freecount = gcnt;
544 irbp->ir_free = gfree;
546 icount += XFS_INODES_PER_CHUNK - gcnt;
549 * Set agino to after this chunk and bump the cursor.
551 agino = gino + XFS_INODES_PER_CHUNK;
552 error = xfs_btree_increment(cur, 0, &tmp);
556 * Drop the btree buffers and the agi buffer.
557 * We can't hold any of the locks these represent
560 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
563 * Now format all the good inodes into the user's buffer.
567 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
569 * Now process this chunk of inodes.
571 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
572 XFS_BULKSTAT_UBLEFT(ubleft) &&
573 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
574 chunkidx++, clustidx++, agino++) {
575 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
577 * Recompute agbno if this is the
578 * first inode of the cluster.
580 * Careful with clustidx. There can be
581 * multple clusters per chunk, a single
582 * cluster per chunk or a cluster that has
583 * inodes represented from several different
584 * chunks (if blocksize is large).
586 * Because of this, the starting clustidx is
587 * initialized to zero in this loop but must
588 * later be reset after reading in the cluster
591 if ((chunkidx & (nicluster - 1)) == 0) {
592 agbno = XFS_AGINO_TO_AGBNO(mp,
594 ((chunkidx & nimask) >>
595 mp->m_sb.sb_inopblog);
597 if (flags & (BULKSTAT_FG_QUICK |
598 BULKSTAT_FG_INLINE)) {
601 ino = XFS_AGINO_TO_INO(mp, agno,
603 bno = XFS_AGB_TO_DADDR(mp, agno,
607 * Get the inode cluster buffer
612 error = xfs_inotobp(mp, NULL, ino, &dip,
617 clustidx = offset / mp->m_sb.sb_inodesize;
618 if (XFS_TEST_ERROR(error != 0,
619 mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
620 XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
628 ino = XFS_AGINO_TO_INO(mp, agno, agino);
629 bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
631 * Skip if this inode is free.
633 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
638 * Count used inodes as free so we can tell
639 * when the chunk is used up.
641 irbp->ir_freecount++;
642 if (!xfs_bulkstat_use_dinode(mp, flags, bp,
648 * If we need to do an iget, cannot hold bp.
649 * Drop it, until starting the next cluster.
651 if ((flags & BULKSTAT_FG_INLINE) && !dip) {
658 * Get the inode and fill in a single buffer.
659 * BULKSTAT_FG_QUICK uses dip to fill it in.
660 * BULKSTAT_FG_IGET uses igets.
661 * BULKSTAT_FG_INLINE uses dip if we have an
662 * inline attr fork, else igets.
663 * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
664 * This is also used to count inodes/blks, etc
665 * in xfs_qm_quotacheck.
667 ubused = statstruct_size;
668 error = formatter(mp, ino, ubufp,
669 ubleft, private_data,
670 bno, &ubused, dip, &fmterror);
671 if (fmterror == BULKSTAT_RV_NOTHING) {
672 if (error && error != ENOENT &&
681 if (fmterror == BULKSTAT_RV_GIVEUP) {
701 * Set up for the next loop iteration.
703 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
708 agino = XFS_INO_TO_AGINO(mp, lastino);
713 * Done, we're either out of filesystem or space to put the data.
718 * Found some inodes, return them now and return the error next time.
722 if (agno >= mp->m_sb.sb_agcount) {
724 * If we ran out of filesystem, mark lastino as off
725 * the end of the filesystem, so the next call
726 * will return immediately.
728 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
731 *lastinop = (xfs_ino_t)lastino;
737 * Return stat information in bulk (by-inode) for the filesystem.
738 * Special case for non-sequential one inode bulkstat.
740 int /* error status */
742 xfs_mount_t *mp, /* mount point for filesystem */
743 xfs_ino_t *lastinop, /* inode to return */
744 char __user *buffer, /* buffer with inode stats */
745 int *done) /* 1 if there are more stats to get */
747 int count; /* count value for bulkstat call */
748 int error; /* return value */
749 xfs_ino_t ino; /* filesystem inode number */
750 int res; /* result from bs1 */
753 * note that requesting valid inode numbers which are not allocated
754 * to inodes will most likely cause xfs_itobp to generate warning
755 * messages about bad magic numbers. This is ok. The fact that
756 * the inode isn't actually an inode is handled by the
757 * error check below. Done this way to make the usual case faster
758 * at the expense of the error case.
761 ino = (xfs_ino_t)*lastinop;
762 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
763 NULL, 0, NULL, NULL, &res);
766 * Special case way failed, do it the "long" way
767 * to see if that works.
771 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
772 NULL, sizeof(xfs_bstat_t), buffer,
773 BULKSTAT_FG_IGET, done))
775 if (count == 0 || (xfs_ino_t)*lastinop != ino)
776 return error == EFSCORRUPTED ?
777 XFS_ERROR(EINVAL) : error;
787 void __user *ubuffer, /* buffer to write to */
788 const xfs_inogrp_t *buffer, /* buffer to read from */
789 long count, /* # of elements to read */
790 long *written) /* # of bytes written */
792 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
794 *written = count * sizeof(*buffer);
799 * Return inode number table for the filesystem.
801 int /* error status */
803 xfs_mount_t *mp, /* mount point for filesystem */
804 xfs_ino_t *lastino, /* last inode returned */
805 int *count, /* size of buffer/count returned */
806 void __user *ubuffer,/* buffer with inode descriptions */
807 inumbers_fmt_pf formatter)
813 xfs_inogrp_t *buffer;
815 xfs_btree_cur_t *cur;
825 ino = (xfs_ino_t)*lastino;
826 agno = XFS_INO_TO_AGNO(mp, ino);
827 agino = XFS_INO_TO_AGINO(mp, ino);
830 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
831 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
835 while (left > 0 && agno < mp->m_sb.sb_agcount) {
837 down_read(&mp->m_peraglock);
838 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
839 up_read(&mp->m_peraglock);
842 * If we can't read the AGI of this ag,
843 * then just skip to the next one.
851 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
852 error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
854 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
859 * Move up the last inode in the current
860 * chunk. The lookup_ge will always get
861 * us the first inode in the next chunk.
863 agino += XFS_INODES_PER_CHUNK - 1;
867 if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
872 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
878 agino = gino + XFS_INODES_PER_CHUNK - 1;
879 buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
880 buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
881 buffer[bufidx].xi_allocmask = ~gfree;
884 if (bufidx == bcount) {
886 if (formatter(ubuffer, buffer, bufidx, &written)) {
887 error = XFS_ERROR(EFAULT);
895 error = xfs_btree_increment(cur, 0, &tmp);
897 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
902 * The agino value has already been bumped.
903 * Just try to skip up to it.
905 agino += XFS_INODES_PER_CHUNK;
913 if (formatter(ubuffer, buffer, bufidx, &written))
914 error = XFS_ERROR(EFAULT);
918 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
922 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :