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_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
27 #include "xfs_mount.h"
28 #include "xfs_inode.h"
29 #include "xfs_btree.h"
30 #include "xfs_ialloc.h"
31 #include "xfs_ialloc_btree.h"
32 #include "xfs_itable.h"
33 #include "xfs_error.h"
34 #include "xfs_trace.h"
35 #include "xfs_icache.h"
36 #include "xfs_dinode.h"
43 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
44 (xfs_sb_version_hasquota(&mp->m_sb) &&
45 xfs_is_quota_inode(&mp->m_sb, ino)));
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 blks_per_cluster; /* # of blocks per cluster */
213 int inodes_per_cluster;/* # of inodes per cluster */
214 int nirbuf; /* size of irbuf */
215 int rval; /* return value error code */
216 int tmp; /* result value from btree calls */
217 int ubcount; /* size of user's buffer */
218 int ubleft; /* bytes left in user's buffer */
219 char __user *ubufp; /* pointer into user's buffer */
220 int ubelem; /* spaces used in user's buffer */
221 int ubused; /* bytes used by formatter */
224 * Get the last inode value, see if there's nothing to do.
226 ino = (xfs_ino_t)*lastinop;
228 agno = XFS_INO_TO_AGNO(mp, ino);
229 agino = XFS_INO_TO_AGINO(mp, ino);
230 if (agno >= mp->m_sb.sb_agcount ||
231 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
236 if (!ubcountp || *ubcountp <= 0) {
239 ubcount = *ubcountp; /* statstruct's */
240 ubleft = ubcount * statstruct_size; /* bytes */
241 *ubcountp = ubelem = 0;
245 blks_per_cluster = xfs_icluster_size_fsb(mp);
246 inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
247 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
251 nirbuf = irbsize / sizeof(*irbuf);
254 * Loop over the allocation groups, starting from the last
255 * inode returned; 0 means start of the allocation group.
258 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
260 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
263 * Skip this allocation group and go to the next one.
269 agi = XFS_BUF_TO_AGI(agbp);
271 * Allocate and initialize a btree cursor for ialloc btree.
273 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
275 irbufend = irbuf + nirbuf;
278 * If we're returning in the middle of an allocation group,
279 * we need to get the remainder of the chunk we're in.
282 xfs_inobt_rec_incore_t r;
285 * Lookup the inode chunk that this inode lives in.
287 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE,
289 if (!error && /* no I/O error */
290 tmp && /* lookup succeeded */
291 /* got the record, should always work */
292 !(error = xfs_inobt_get_rec(cur, &r, &i)) &&
294 /* this is the right chunk */
295 agino < r.ir_startino + XFS_INODES_PER_CHUNK &&
296 /* lastino was not last in chunk */
297 (chunkidx = agino - r.ir_startino + 1) <
298 XFS_INODES_PER_CHUNK &&
299 /* there are some left allocated */
300 xfs_inobt_maskn(chunkidx,
301 XFS_INODES_PER_CHUNK - chunkidx) &
304 * Grab the chunk record. Mark all the
305 * uninteresting inodes (because they're
306 * before our start point) free.
308 for (i = 0; i < chunkidx; i++) {
309 if (XFS_INOBT_MASK(i) & ~r.ir_free)
312 r.ir_free |= xfs_inobt_maskn(0, chunkidx);
313 irbp->ir_startino = r.ir_startino;
314 irbp->ir_freecount = r.ir_freecount;
315 irbp->ir_free = r.ir_free;
317 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
318 icount = XFS_INODES_PER_CHUNK - r.ir_freecount;
321 * If any of those tests failed, bump the
322 * inode number (just in case).
328 * In any case, increment to the next record.
331 error = xfs_btree_increment(cur, 0, &tmp);
334 * Start of ag. Lookup the first inode chunk.
336 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
340 * Loop through inode btree records in this ag,
341 * until we run out of inodes or space in the buffer.
343 while (irbp < irbufend && icount < ubcount) {
344 xfs_inobt_rec_incore_t r;
347 * Loop as long as we're unable to read the
351 agino += XFS_INODES_PER_CHUNK;
352 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
353 be32_to_cpu(agi->agi_length))
355 error = xfs_inobt_lookup(cur, agino,
356 XFS_LOOKUP_GE, &tmp);
360 * If ran off the end of the ag either with an error,
361 * or the normal way, set end and stop collecting.
368 error = xfs_inobt_get_rec(cur, &r, &i);
369 if (error || i == 0) {
375 * If this chunk has any allocated inodes, save it.
376 * Also start read-ahead now for this chunk.
378 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
379 struct blk_plug plug;
381 * Loop over all clusters in the next chunk.
382 * Do a readahead if there are any allocated
383 * inodes in that cluster.
385 blk_start_plug(&plug);
386 agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
388 chunkidx < XFS_INODES_PER_CHUNK;
389 chunkidx += inodes_per_cluster,
390 agbno += blks_per_cluster) {
391 if (xfs_inobt_maskn(chunkidx,
392 inodes_per_cluster) & ~r.ir_free)
393 xfs_btree_reada_bufs(mp, agno,
394 agbno, blks_per_cluster,
397 blk_finish_plug(&plug);
398 irbp->ir_startino = r.ir_startino;
399 irbp->ir_freecount = r.ir_freecount;
400 irbp->ir_free = r.ir_free;
402 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
405 * Set agino to after this chunk and bump the cursor.
407 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
408 error = xfs_btree_increment(cur, 0, &tmp);
412 * Drop the btree buffers and the agi buffer.
413 * We can't hold any of the locks these represent
416 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
419 * Now format all the good inodes into the user's buffer.
423 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
425 * Now process this chunk of inodes.
427 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
428 XFS_BULKSTAT_UBLEFT(ubleft) &&
429 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
430 chunkidx++, clustidx++, agino++) {
431 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
433 ino = XFS_AGINO_TO_INO(mp, agno, agino);
435 * Skip if this inode is free.
437 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
442 * Count used inodes as free so we can tell
443 * when the chunk is used up.
445 irbp->ir_freecount++;
448 * Get the inode and fill in a single buffer.
450 ubused = statstruct_size;
451 error = formatter(mp, ino, ubufp, ubleft,
453 if (fmterror == BULKSTAT_RV_NOTHING) {
454 if (error && error != ENOENT &&
463 if (fmterror == BULKSTAT_RV_GIVEUP) {
479 * Set up for the next loop iteration.
481 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
486 agino = XFS_INO_TO_AGINO(mp, lastino);
491 * Done, we're either out of filesystem or space to put the data.
496 * Found some inodes, return them now and return the error next time.
500 if (agno >= mp->m_sb.sb_agcount) {
502 * If we ran out of filesystem, mark lastino as off
503 * the end of the filesystem, so the next call
504 * will return immediately.
506 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
509 *lastinop = (xfs_ino_t)lastino;
515 * Return stat information in bulk (by-inode) for the filesystem.
516 * Special case for non-sequential one inode bulkstat.
518 int /* error status */
520 xfs_mount_t *mp, /* mount point for filesystem */
521 xfs_ino_t *lastinop, /* inode to return */
522 char __user *buffer, /* buffer with inode stats */
523 int *done) /* 1 if there are more stats to get */
525 int count; /* count value for bulkstat call */
526 int error; /* return value */
527 xfs_ino_t ino; /* filesystem inode number */
528 int res; /* result from bs1 */
531 * note that requesting valid inode numbers which are not allocated
532 * to inodes will most likely cause xfs_imap_to_bp to generate warning
533 * messages about bad magic numbers. This is ok. The fact that
534 * the inode isn't actually an inode is handled by the
535 * error check below. Done this way to make the usual case faster
536 * at the expense of the error case.
540 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
544 * Special case way failed, do it the "long" way
545 * to see if that works.
549 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
550 sizeof(xfs_bstat_t), buffer, done))
552 if (count == 0 || (xfs_ino_t)*lastinop != ino)
553 return error == EFSCORRUPTED ?
554 XFS_ERROR(EINVAL) : error;
564 void __user *ubuffer, /* buffer to write to */
565 const xfs_inogrp_t *buffer, /* buffer to read from */
566 long count, /* # of elements to read */
567 long *written) /* # of bytes written */
569 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
571 *written = count * sizeof(*buffer);
576 * Return inode number table for the filesystem.
578 int /* error status */
580 xfs_mount_t *mp, /* mount point for filesystem */
581 xfs_ino_t *lastino, /* last inode returned */
582 int *count, /* size of buffer/count returned */
583 void __user *ubuffer,/* buffer with inode descriptions */
584 inumbers_fmt_pf formatter)
590 xfs_inogrp_t *buffer;
592 xfs_btree_cur_t *cur;
594 xfs_inobt_rec_incore_t r;
600 ino = (xfs_ino_t)*lastino;
601 agno = XFS_INO_TO_AGNO(mp, ino);
602 agino = XFS_INO_TO_AGINO(mp, ino);
605 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
606 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
610 while (left > 0 && agno < mp->m_sb.sb_agcount) {
612 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
615 * If we can't read the AGI of this ag,
616 * then just skip to the next one.
624 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
625 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
628 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
633 * Move up the last inode in the current
634 * chunk. The lookup_ge will always get
635 * us the first inode in the next chunk.
637 agino += XFS_INODES_PER_CHUNK - 1;
641 error = xfs_inobt_get_rec(cur, &r, &i);
642 if (error || i == 0) {
645 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
651 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
652 buffer[bufidx].xi_startino =
653 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
654 buffer[bufidx].xi_alloccount =
655 XFS_INODES_PER_CHUNK - r.ir_freecount;
656 buffer[bufidx].xi_allocmask = ~r.ir_free;
659 if (bufidx == bcount) {
661 if (formatter(ubuffer, buffer, bufidx, &written)) {
662 error = XFS_ERROR(EFAULT);
670 error = xfs_btree_increment(cur, 0, &tmp);
672 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
677 * The agino value has already been bumped.
678 * Just try to skip up to it.
680 agino += XFS_INODES_PER_CHUNK;
688 if (formatter(ubuffer, buffer, bufidx, &written))
689 error = XFS_ERROR(EFAULT);
693 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
697 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :