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"
23 #include "xfs_trans.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"
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)));
49 * Return stat information for one inode.
50 * Return 0 if ok, else errno.
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_... */
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 */
67 *stat = BULKSTAT_RV_NOTHING;
69 if (!buffer || xfs_internal_inum(mp, ino))
70 return XFS_ERROR(EINVAL);
72 buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
74 return XFS_ERROR(ENOMEM);
76 error = xfs_iget(mp, NULL, ino,
77 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
78 XFS_ILOCK_SHARED, &ip);
80 *stat = BULKSTAT_RV_NOTHING;
85 ASSERT(ip->i_imap.im_blkno != 0);
89 /* xfs_iget returns the following without needing
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;
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);
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;
122 case XFS_DINODE_FMT_LOCAL:
123 case XFS_DINODE_FMT_UUID:
125 buf->bs_blksize = mp->m_sb.sb_blocksize;
128 case XFS_DINODE_FMT_EXTENTS:
129 case XFS_DINODE_FMT_BTREE:
131 buf->bs_blksize = mp->m_sb.sb_blocksize;
132 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
135 xfs_iunlock(ip, XFS_ILOCK_SHARED);
138 error = formatter(buffer, ubsize, ubused, buf);
141 *stat = BULKSTAT_RV_DIDONE;
148 /* Return 0 on success or positive error */
150 xfs_bulkstat_one_fmt(
151 void __user *ubuffer,
154 const xfs_bstat_t *buffer)
156 if (ubsize < sizeof(*buffer))
157 return XFS_ERROR(ENOMEM);
158 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
159 return XFS_ERROR(EFAULT);
161 *ubused = sizeof(*buffer);
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_... */
174 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
175 xfs_bulkstat_one_fmt, ubused, stat);
178 #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
181 * Return stat information in bulk (by-inode) for the filesystem.
183 int /* error status */
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 */
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 */
226 * Get the last inode value, see if there's nothing to do.
228 ino = (xfs_ino_t)*lastinop;
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)) {
238 if (!ubcountp || *ubcountp <= 0) {
241 ubcount = *ubcountp; /* statstruct's */
242 ubleft = ubcount * statstruct_size; /* bytes */
243 *ubcountp = ubelem = 0;
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);
256 nirbuf = irbsize / sizeof(*irbuf);
259 * Loop over the allocation groups, starting from the last
260 * inode returned; 0 means start of the allocation group.
263 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
266 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
269 * Skip this allocation group and go to the next one.
275 agi = XFS_BUF_TO_AGI(agbp);
277 * Allocate and initialize a btree cursor for ialloc btree.
279 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
281 irbufend = irbuf + nirbuf;
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.
288 xfs_inobt_rec_incore_t r;
291 * Lookup the inode chunk that this inode lives in.
293 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE,
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)) &&
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) &
310 * Grab the chunk record. Mark all the
311 * uninteresting inodes (because they're
312 * before our start point) free.
314 for (i = 0; i < chunkidx; i++) {
315 if (XFS_INOBT_MASK(i) & ~r.ir_free)
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;
323 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
324 icount = XFS_INODES_PER_CHUNK - r.ir_freecount;
327 * If any of those tests failed, bump the
328 * inode number (just in case).
334 * In any case, increment to the next record.
337 error = xfs_btree_increment(cur, 0, &tmp);
340 * Start of ag. Lookup the first inode chunk.
342 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
346 * Loop through inode btree records in this ag,
347 * until we run out of inodes or space in the buffer.
349 while (irbp < irbufend && icount < ubcount) {
350 xfs_inobt_rec_incore_t r;
353 * Loop as long as we're unable to read the
357 agino += XFS_INODES_PER_CHUNK;
358 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
359 be32_to_cpu(agi->agi_length))
361 error = xfs_inobt_lookup(cur, agino,
362 XFS_LOOKUP_GE, &tmp);
366 * If ran off the end of the ag either with an error,
367 * or the normal way, set end and stop collecting.
374 error = xfs_inobt_get_rec(cur, &r, &i);
375 if (error || i == 0) {
381 * If this chunk has any allocated inodes, save it.
382 * Also start read-ahead now for this chunk.
384 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
386 * Loop over all clusters in the next chunk.
387 * Do a readahead if there are any allocated
388 * inodes in that cluster.
390 agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
392 chunkidx < XFS_INODES_PER_CHUNK;
393 chunkidx += nicluster,
394 agbno += nbcluster) {
395 if (xfs_inobt_maskn(chunkidx, nicluster)
397 xfs_btree_reada_bufs(mp, agno,
400 irbp->ir_startino = r.ir_startino;
401 irbp->ir_freecount = r.ir_freecount;
402 irbp->ir_free = r.ir_free;
404 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
407 * Set agino to after this chunk and bump the cursor.
409 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
410 error = xfs_btree_increment(cur, 0, &tmp);
414 * Drop the btree buffers and the agi buffer.
415 * We can't hold any of the locks these represent
418 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
421 * Now format all the good inodes into the user's buffer.
425 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
427 * Now process this chunk of inodes.
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);
435 * Recompute agbno if this is the
436 * first inode of the cluster.
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).
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
449 if ((chunkidx & (nicluster - 1)) == 0) {
450 agbno = XFS_AGINO_TO_AGBNO(mp,
452 ((chunkidx & nimask) >>
453 mp->m_sb.sb_inopblog);
455 ino = XFS_AGINO_TO_INO(mp, agno, agino);
457 * Skip if this inode is free.
459 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
464 * Count used inodes as free so we can tell
465 * when the chunk is used up.
467 irbp->ir_freecount++;
470 * Get the inode and fill in a single buffer.
472 ubused = statstruct_size;
473 error = formatter(mp, ino, ubufp, ubleft,
475 if (fmterror == BULKSTAT_RV_NOTHING) {
476 if (error && error != ENOENT &&
485 if (fmterror == BULKSTAT_RV_GIVEUP) {
505 * Set up for the next loop iteration.
507 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
512 agino = XFS_INO_TO_AGINO(mp, lastino);
517 * Done, we're either out of filesystem or space to put the data.
519 kmem_free_large(irbuf);
522 * Found some inodes, return them now and return the error next time.
526 if (agno >= mp->m_sb.sb_agcount) {
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.
532 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
535 *lastinop = (xfs_ino_t)lastino;
541 * Return stat information in bulk (by-inode) for the filesystem.
542 * Special case for non-sequential one inode bulkstat.
544 int /* error status */
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 */
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 */
557 * note that requesting valid inode numbers which are not allocated
558 * to inodes will most likely cause xfs_itobp 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.
565 ino = (xfs_ino_t)*lastinop;
566 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), 0, &res);
569 * Special case way failed, do it the "long" way
570 * to see if that works.
574 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
575 sizeof(xfs_bstat_t), buffer, done))
577 if (count == 0 || (xfs_ino_t)*lastinop != ino)
578 return error == EFSCORRUPTED ?
579 XFS_ERROR(EINVAL) : error;
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 */
594 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
596 *written = count * sizeof(*buffer);
601 * Return inode number table for the filesystem.
603 int /* error status */
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)
615 xfs_inogrp_t *buffer;
617 xfs_btree_cur_t *cur;
619 xfs_inobt_rec_incore_t r;
625 ino = (xfs_ino_t)*lastino;
626 agno = XFS_INO_TO_AGNO(mp, ino);
627 agino = XFS_INO_TO_AGINO(mp, ino);
630 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
631 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
635 while (left > 0 && agno < mp->m_sb.sb_agcount) {
637 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
640 * If we can't read the AGI of this ag,
641 * then just skip to the next one.
649 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
650 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
653 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
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.
662 agino += XFS_INODES_PER_CHUNK - 1;
666 error = xfs_inobt_get_rec(cur, &r, &i);
667 if (error || i == 0) {
670 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
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;
684 if (bufidx == bcount) {
686 if (formatter(ubuffer, buffer, bufidx, &written)) {
687 error = XFS_ERROR(EFAULT);
695 error = xfs_btree_increment(cur, 0, &tmp);
697 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
702 * The agino value has already been bumped.
703 * Just try to skip up to it.
705 agino += XFS_INODES_PER_CHUNK;
713 if (formatter(ubuffer, buffer, bufidx, &written))
714 error = XFS_ERROR(EFAULT);
718 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
722 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :