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))
72 buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
76 error = xfs_iget(mp, NULL, ino,
77 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
78 XFS_ILOCK_SHARED, &ip);
83 ASSERT(ip->i_imap.im_blkno != 0);
87 /* xfs_iget returns the following without needing
90 buf->bs_nlink = dic->di_nlink;
91 buf->bs_projid_lo = dic->di_projid_lo;
92 buf->bs_projid_hi = dic->di_projid_hi;
94 buf->bs_mode = dic->di_mode;
95 buf->bs_uid = dic->di_uid;
96 buf->bs_gid = dic->di_gid;
97 buf->bs_size = dic->di_size;
98 buf->bs_atime.tv_sec = dic->di_atime.t_sec;
99 buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
100 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
101 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
102 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
103 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
104 buf->bs_xflags = xfs_ip2xflags(ip);
105 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
106 buf->bs_extents = dic->di_nextents;
107 buf->bs_gen = dic->di_gen;
108 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
109 buf->bs_dmevmask = dic->di_dmevmask;
110 buf->bs_dmstate = dic->di_dmstate;
111 buf->bs_aextents = dic->di_anextents;
112 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
114 switch (dic->di_format) {
115 case XFS_DINODE_FMT_DEV:
116 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
117 buf->bs_blksize = BLKDEV_IOSIZE;
120 case XFS_DINODE_FMT_LOCAL:
121 case XFS_DINODE_FMT_UUID:
123 buf->bs_blksize = mp->m_sb.sb_blocksize;
126 case XFS_DINODE_FMT_EXTENTS:
127 case XFS_DINODE_FMT_BTREE:
129 buf->bs_blksize = mp->m_sb.sb_blocksize;
130 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
133 xfs_iunlock(ip, XFS_ILOCK_SHARED);
136 error = formatter(buffer, ubsize, ubused, buf);
138 *stat = BULKSTAT_RV_DIDONE;
145 /* Return 0 on success or positive error */
147 xfs_bulkstat_one_fmt(
148 void __user *ubuffer,
151 const xfs_bstat_t *buffer)
153 if (ubsize < sizeof(*buffer))
155 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
158 *ubused = sizeof(*buffer);
164 xfs_mount_t *mp, /* mount point for filesystem */
165 xfs_ino_t ino, /* inode number to get data for */
166 void __user *buffer, /* buffer to place output in */
167 int ubsize, /* size of buffer */
168 int *ubused, /* bytes used by me */
169 int *stat) /* BULKSTAT_RV_... */
171 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
172 xfs_bulkstat_one_fmt, ubused, stat);
176 * Loop over all clusters in a chunk for a given incore inode allocation btree
177 * record. Do a readahead if there are any allocated inodes in that cluster.
180 xfs_bulkstat_ichunk_ra(
181 struct xfs_mount *mp,
183 struct xfs_inobt_rec_incore *irec)
186 struct blk_plug plug;
187 int blks_per_cluster;
188 int inodes_per_cluster;
189 int i; /* inode chunk index */
191 agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
192 blks_per_cluster = xfs_icluster_size_fsb(mp);
193 inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
195 blk_start_plug(&plug);
196 for (i = 0; i < XFS_INODES_PER_CHUNK;
197 i += inodes_per_cluster, agbno += blks_per_cluster) {
198 if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
199 xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
203 blk_finish_plug(&plug);
207 * Lookup the inode chunk that the given inode lives in and then get the record
208 * if we found the chunk. If the inode was not the last in the chunk and there
209 * are some left allocated, update the data for the pointed-to record as well as
210 * return the count of grabbed inodes.
213 xfs_bulkstat_grab_ichunk(
214 struct xfs_btree_cur *cur, /* btree cursor */
215 xfs_agino_t agino, /* starting inode of chunk */
216 int *icount,/* return # of inodes grabbed */
217 struct xfs_inobt_rec_incore *irec) /* btree record */
219 int idx; /* index into inode chunk */
223 /* Lookup the inode chunk that this inode lives in */
224 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
232 /* Get the record, should always work */
233 error = xfs_inobt_get_rec(cur, irec, &stat);
236 XFS_WANT_CORRUPTED_RETURN(stat == 1);
238 /* Check if the record contains the inode in request */
239 if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino)
242 idx = agino - irec->ir_startino + 1;
243 if (idx < XFS_INODES_PER_CHUNK &&
244 (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
247 /* We got a right chunk with some left inodes allocated at it.
248 * Grab the chunk record. Mark all the uninteresting inodes
249 * free -- because they're before our start point.
251 for (i = 0; i < idx; i++) {
252 if (XFS_INOBT_MASK(i) & ~irec->ir_free)
253 irec->ir_freecount++;
256 irec->ir_free |= xfs_inobt_maskn(0, idx);
257 *icount = XFS_INODES_PER_CHUNK - irec->ir_freecount;
263 #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
266 * Process inodes in chunk with a pointer to a formatter function
267 * that will iget the inode and fill in the appropriate structure.
270 xfs_bulkstat_ag_ichunk(
271 struct xfs_mount *mp,
273 struct xfs_inobt_rec_incore *irbp,
274 bulkstat_one_pf formatter,
275 size_t statstruct_size,
276 struct xfs_bulkstat_agichunk *acp)
278 xfs_ino_t lastino = acp->ac_lastino;
279 char __user **ubufp = acp->ac_ubuffer;
280 int ubleft = acp->ac_ubleft;
281 int ubelem = acp->ac_ubelem;
282 int chunkidx, clustidx;
286 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
287 XFS_BULKSTAT_UBLEFT(ubleft) &&
288 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
289 chunkidx++, clustidx++, agino++) {
290 int fmterror; /* bulkstat formatter result */
292 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, agno, agino);
294 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
296 /* Skip if this inode is free */
297 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
303 * Count used inodes as free so we can tell when the
306 irbp->ir_freecount++;
308 /* Get the inode and fill in a single buffer */
309 ubused = statstruct_size;
310 error = formatter(mp, ino, *ubufp, ubleft, &ubused, &fmterror);
311 if (fmterror == BULKSTAT_RV_NOTHING) {
312 if (error && error != -ENOENT && error != -EINVAL) {
319 if (fmterror == BULKSTAT_RV_GIVEUP) {
331 acp->ac_lastino = lastino;
332 acp->ac_ubleft = ubleft;
333 acp->ac_ubelem = ubelem;
339 * Return stat information in bulk (by-inode) for the filesystem.
341 int /* error status */
343 xfs_mount_t *mp, /* mount point for filesystem */
344 xfs_ino_t *lastinop, /* last inode returned */
345 int *ubcountp, /* size of buffer/count returned */
346 bulkstat_one_pf formatter, /* func that'd fill a single buf */
347 size_t statstruct_size, /* sizeof struct filling */
348 char __user *ubuffer, /* buffer with inode stats */
349 int *done) /* 1 if there are more stats to get */
351 xfs_buf_t *agbp; /* agi header buffer */
352 xfs_agi_t *agi; /* agi header data */
353 xfs_agino_t agino; /* inode # in allocation group */
354 xfs_agnumber_t agno; /* allocation group number */
355 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
356 int end_of_ag; /* set if we've seen the ag end */
357 int error; /* error code */
358 int fmterror;/* bulkstat formatter result */
359 int i; /* loop index */
360 int icount; /* count of inodes good in irbuf */
361 size_t irbsize; /* size of irec buffer in bytes */
362 xfs_ino_t ino; /* inode number (filesystem) */
363 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
364 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
365 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
366 xfs_ino_t lastino; /* last inode number returned */
367 int nirbuf; /* size of irbuf */
368 int rval; /* return value error code */
369 int tmp; /* result value from btree calls */
370 int ubcount; /* size of user's buffer */
371 int ubleft; /* bytes left in user's buffer */
372 char __user *ubufp; /* pointer into user's buffer */
373 int ubelem; /* spaces used in user's buffer */
376 * Get the last inode value, see if there's nothing to do.
378 ino = (xfs_ino_t)*lastinop;
380 agno = XFS_INO_TO_AGNO(mp, ino);
381 agino = XFS_INO_TO_AGINO(mp, ino);
382 if (agno >= mp->m_sb.sb_agcount ||
383 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
389 ubcount = *ubcountp; /* statstruct's */
390 ubleft = ubcount * statstruct_size; /* bytes */
391 *ubcountp = ubelem = 0;
395 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
399 nirbuf = irbsize / sizeof(*irbuf);
402 * Loop over the allocation groups, starting from the last
403 * inode returned; 0 means start of the allocation group.
406 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
408 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
411 agi = XFS_BUF_TO_AGI(agbp);
413 * Allocate and initialize a btree cursor for ialloc btree.
415 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
418 irbufend = irbuf + nirbuf;
423 * In the middle of an allocation group, we need to get
424 * the remainder of the chunk we're in.
426 struct xfs_inobt_rec_incore r;
428 error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
432 irbp->ir_startino = r.ir_startino;
433 irbp->ir_freecount = r.ir_freecount;
434 irbp->ir_free = r.ir_free;
436 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
438 /* Increment to the next record */
439 error = xfs_btree_increment(cur, 0, &tmp);
441 /* Start of ag. Lookup the first inode chunk */
442 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
448 * Loop through inode btree records in this ag,
449 * until we run out of inodes or space in the buffer.
451 while (irbp < irbufend && icount < ubcount) {
452 struct xfs_inobt_rec_incore r;
454 error = xfs_inobt_get_rec(cur, &r, &i);
455 if (error || i == 0) {
461 * If this chunk has any allocated inodes, save it.
462 * Also start read-ahead now for this chunk.
464 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
465 xfs_bulkstat_ichunk_ra(mp, agno, &r);
466 irbp->ir_startino = r.ir_startino;
467 irbp->ir_freecount = r.ir_freecount;
468 irbp->ir_free = r.ir_free;
470 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
473 * Set agino to after this chunk and bump the cursor.
475 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
476 error = xfs_btree_increment(cur, 0, &tmp);
480 * Drop the btree buffers and the agi buffer.
481 * We can't hold any of the locks these represent
484 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
487 * Now format all the good inodes into the user's buffer.
491 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
492 struct xfs_bulkstat_agichunk ac;
494 ac.ac_lastino = lastino;
495 ac.ac_ubuffer = &ubuffer;
496 ac.ac_ubleft = ubleft;
497 ac.ac_ubelem = ubelem;
498 error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
499 formatter, statstruct_size, &ac);
503 lastino = ac.ac_lastino;
504 ubleft = ac.ac_ubleft;
505 ubelem = ac.ac_ubelem;
510 * Set up for the next loop iteration.
512 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
517 agino = XFS_INO_TO_AGINO(mp, lastino);
522 * Done, we're either out of filesystem or space to put the data.
527 * Found some inodes, return them now and return the error next time.
531 if (agno >= mp->m_sb.sb_agcount) {
533 * If we ran out of filesystem, mark lastino as off
534 * the end of the filesystem, so the next call
535 * will return immediately.
537 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
540 *lastinop = (xfs_ino_t)lastino;
547 void __user *ubuffer, /* buffer to write to */
548 const struct xfs_inogrp *buffer, /* buffer to read from */
549 long count, /* # of elements to read */
550 long *written) /* # of bytes written */
552 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
554 *written = count * sizeof(*buffer);
559 * Return inode number table for the filesystem.
561 int /* error status */
563 struct xfs_mount *mp,/* mount point for filesystem */
564 xfs_ino_t *lastino,/* last inode returned */
565 int *count,/* size of buffer/count returned */
566 void __user *ubuffer,/* buffer with inode descriptions */
567 inumbers_fmt_pf formatter)
569 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
570 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
571 struct xfs_btree_cur *cur = NULL;
572 struct xfs_buf *agbp = NULL;
573 struct xfs_inogrp *buffer;
580 if (agno >= mp->m_sb.sb_agcount ||
581 *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
584 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
585 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
587 struct xfs_inobt_rec_incore r;
591 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
595 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
597 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
605 error = xfs_inobt_get_rec(cur, &r, &stat);
611 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
612 buffer[bufidx].xi_startino =
613 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
614 buffer[bufidx].xi_alloccount =
615 XFS_INODES_PER_CHUNK - r.ir_freecount;
616 buffer[bufidx].xi_allocmask = ~r.ir_free;
617 if (++bufidx == bcount) {
620 error = formatter(ubuffer, buffer, bufidx, &written);
630 error = xfs_btree_increment(cur, 0, &stat);
637 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
643 } while (agno < mp->m_sb.sb_agcount);
649 error = formatter(ubuffer, buffer, bufidx, &written);
653 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
658 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :