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1/*
2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_btree.h"
27#include "xfs_ialloc.h"
28#include "xfs_ialloc_btree.h"
29#include "xfs_itable.h"
30#include "xfs_error.h"
31#include "xfs_trace.h"
32#include "xfs_icache.h"
33
34/*
35 * Return stat information for one inode.
36 * Return 0 if ok, else errno.
37 */
38int
39xfs_bulkstat_one_int(
40 struct xfs_mount *mp, /* mount point for filesystem */
41 xfs_ino_t ino, /* inode to get data for */
42 void __user *buffer, /* buffer to place output in */
43 int ubsize, /* size of buffer */
44 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
45 int *ubused, /* bytes used by me */
46 int *stat) /* BULKSTAT_RV_... */
47{
48 struct xfs_icdinode *dic; /* dinode core info pointer */
49 struct xfs_inode *ip; /* incore inode pointer */
50 struct inode *inode;
51 struct xfs_bstat *buf; /* return buffer */
52 int error = 0; /* error value */
53
54 *stat = BULKSTAT_RV_NOTHING;
55
56 if (!buffer || xfs_internal_inum(mp, ino))
57 return -EINVAL;
58
59 buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
60 if (!buf)
61 return -ENOMEM;
62
63 error = xfs_iget(mp, NULL, ino,
64 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
65 XFS_ILOCK_SHARED, &ip);
66 if (error)
67 goto out_free;
68
69 ASSERT(ip != NULL);
70 ASSERT(ip->i_imap.im_blkno != 0);
71 inode = VFS_I(ip);
72
73 dic = &ip->i_d;
74
75 /* xfs_iget returns the following without needing
76 * further change.
77 */
78 buf->bs_projid_lo = dic->di_projid_lo;
79 buf->bs_projid_hi = dic->di_projid_hi;
80 buf->bs_ino = ino;
81 buf->bs_uid = dic->di_uid;
82 buf->bs_gid = dic->di_gid;
83 buf->bs_size = dic->di_size;
84
85 buf->bs_nlink = inode->i_nlink;
86 buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
87 buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
88 buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
89 buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
90 buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
91 buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
92 buf->bs_gen = inode->i_generation;
93 buf->bs_mode = inode->i_mode;
94
95 buf->bs_xflags = xfs_ip2xflags(ip);
96 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
97 buf->bs_extents = dic->di_nextents;
98 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
99 buf->bs_dmevmask = dic->di_dmevmask;
100 buf->bs_dmstate = dic->di_dmstate;
101 buf->bs_aextents = dic->di_anextents;
102 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
103
104 if (dic->di_version == 3) {
105 if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
106 buf->bs_cowextsize = dic->di_cowextsize <<
107 mp->m_sb.sb_blocklog;
108 }
109
110 switch (dic->di_format) {
111 case XFS_DINODE_FMT_DEV:
112 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
113 buf->bs_blksize = BLKDEV_IOSIZE;
114 buf->bs_blocks = 0;
115 break;
116 case XFS_DINODE_FMT_LOCAL:
117 buf->bs_rdev = 0;
118 buf->bs_blksize = mp->m_sb.sb_blocksize;
119 buf->bs_blocks = 0;
120 break;
121 case XFS_DINODE_FMT_EXTENTS:
122 case XFS_DINODE_FMT_BTREE:
123 buf->bs_rdev = 0;
124 buf->bs_blksize = mp->m_sb.sb_blocksize;
125 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
126 break;
127 }
128 xfs_iunlock(ip, XFS_ILOCK_SHARED);
129 IRELE(ip);
130
131 error = formatter(buffer, ubsize, ubused, buf);
132 if (!error)
133 *stat = BULKSTAT_RV_DIDONE;
134
135 out_free:
136 kmem_free(buf);
137 return error;
138}
139
140/* Return 0 on success or positive error */
141STATIC int
142xfs_bulkstat_one_fmt(
143 void __user *ubuffer,
144 int ubsize,
145 int *ubused,
146 const xfs_bstat_t *buffer)
147{
148 if (ubsize < sizeof(*buffer))
149 return -ENOMEM;
150 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
151 return -EFAULT;
152 if (ubused)
153 *ubused = sizeof(*buffer);
154 return 0;
155}
156
157int
158xfs_bulkstat_one(
159 xfs_mount_t *mp, /* mount point for filesystem */
160 xfs_ino_t ino, /* inode number to get data for */
161 void __user *buffer, /* buffer to place output in */
162 int ubsize, /* size of buffer */
163 int *ubused, /* bytes used by me */
164 int *stat) /* BULKSTAT_RV_... */
165{
166 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
167 xfs_bulkstat_one_fmt, ubused, stat);
168}
169
170/*
171 * Loop over all clusters in a chunk for a given incore inode allocation btree
172 * record. Do a readahead if there are any allocated inodes in that cluster.
173 */
174STATIC void
175xfs_bulkstat_ichunk_ra(
176 struct xfs_mount *mp,
177 xfs_agnumber_t agno,
178 struct xfs_inobt_rec_incore *irec)
179{
180 xfs_agblock_t agbno;
181 struct blk_plug plug;
182 int blks_per_cluster;
183 int inodes_per_cluster;
184 int i; /* inode chunk index */
185
186 agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
187 blks_per_cluster = xfs_icluster_size_fsb(mp);
188 inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
189
190 blk_start_plug(&plug);
191 for (i = 0; i < XFS_INODES_PER_CHUNK;
192 i += inodes_per_cluster, agbno += blks_per_cluster) {
193 if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
194 xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
195 &xfs_inode_buf_ops);
196 }
197 }
198 blk_finish_plug(&plug);
199}
200
201/*
202 * Lookup the inode chunk that the given inode lives in and then get the record
203 * if we found the chunk. If the inode was not the last in the chunk and there
204 * are some left allocated, update the data for the pointed-to record as well as
205 * return the count of grabbed inodes.
206 */
207STATIC int
208xfs_bulkstat_grab_ichunk(
209 struct xfs_btree_cur *cur, /* btree cursor */
210 xfs_agino_t agino, /* starting inode of chunk */
211 int *icount,/* return # of inodes grabbed */
212 struct xfs_inobt_rec_incore *irec) /* btree record */
213{
214 int idx; /* index into inode chunk */
215 int stat;
216 int error = 0;
217
218 /* Lookup the inode chunk that this inode lives in */
219 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
220 if (error)
221 return error;
222 if (!stat) {
223 *icount = 0;
224 return error;
225 }
226
227 /* Get the record, should always work */
228 error = xfs_inobt_get_rec(cur, irec, &stat);
229 if (error)
230 return error;
231 XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
232
233 /* Check if the record contains the inode in request */
234 if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
235 *icount = 0;
236 return 0;
237 }
238
239 idx = agino - irec->ir_startino + 1;
240 if (idx < XFS_INODES_PER_CHUNK &&
241 (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
242 int i;
243
244 /* We got a right chunk with some left inodes allocated at it.
245 * Grab the chunk record. Mark all the uninteresting inodes
246 * free -- because they're before our start point.
247 */
248 for (i = 0; i < idx; i++) {
249 if (XFS_INOBT_MASK(i) & ~irec->ir_free)
250 irec->ir_freecount++;
251 }
252
253 irec->ir_free |= xfs_inobt_maskn(0, idx);
254 *icount = irec->ir_count - irec->ir_freecount;
255 }
256
257 return 0;
258}
259
260#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
261
262struct xfs_bulkstat_agichunk {
263 char __user **ac_ubuffer;/* pointer into user's buffer */
264 int ac_ubleft; /* bytes left in user's buffer */
265 int ac_ubelem; /* spaces used in user's buffer */
266};
267
268/*
269 * Process inodes in chunk with a pointer to a formatter function
270 * that will iget the inode and fill in the appropriate structure.
271 */
272static int
273xfs_bulkstat_ag_ichunk(
274 struct xfs_mount *mp,
275 xfs_agnumber_t agno,
276 struct xfs_inobt_rec_incore *irbp,
277 bulkstat_one_pf formatter,
278 size_t statstruct_size,
279 struct xfs_bulkstat_agichunk *acp,
280 xfs_agino_t *last_agino)
281{
282 char __user **ubufp = acp->ac_ubuffer;
283 int chunkidx;
284 int error = 0;
285 xfs_agino_t agino = irbp->ir_startino;
286
287 for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK;
288 chunkidx++, agino++) {
289 int fmterror;
290 int ubused;
291
292 /* inode won't fit in buffer, we are done */
293 if (acp->ac_ubleft < statstruct_size)
294 break;
295
296 /* Skip if this inode is free */
297 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
298 continue;
299
300 /* Get the inode and fill in a single buffer */
301 ubused = statstruct_size;
302 error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino),
303 *ubufp, acp->ac_ubleft, &ubused, &fmterror);
304
305 if (fmterror == BULKSTAT_RV_GIVEUP ||
306 (error && error != -ENOENT && error != -EINVAL)) {
307 acp->ac_ubleft = 0;
308 ASSERT(error);
309 break;
310 }
311
312 /* be careful not to leak error if at end of chunk */
313 if (fmterror == BULKSTAT_RV_NOTHING || error) {
314 error = 0;
315 continue;
316 }
317
318 *ubufp += ubused;
319 acp->ac_ubleft -= ubused;
320 acp->ac_ubelem++;
321 }
322
323 /*
324 * Post-update *last_agino. At this point, agino will always point one
325 * inode past the last inode we processed successfully. Hence we
326 * substract that inode when setting the *last_agino cursor so that we
327 * return the correct cookie to userspace. On the next bulkstat call,
328 * the inode under the lastino cookie will be skipped as we have already
329 * processed it here.
330 */
331 *last_agino = agino - 1;
332
333 return error;
334}
335
336/*
337 * Return stat information in bulk (by-inode) for the filesystem.
338 */
339int /* error status */
340xfs_bulkstat(
341 xfs_mount_t *mp, /* mount point for filesystem */
342 xfs_ino_t *lastinop, /* last inode returned */
343 int *ubcountp, /* size of buffer/count returned */
344 bulkstat_one_pf formatter, /* func that'd fill a single buf */
345 size_t statstruct_size, /* sizeof struct filling */
346 char __user *ubuffer, /* buffer with inode stats */
347 int *done) /* 1 if there are more stats to get */
348{
349 xfs_buf_t *agbp; /* agi header buffer */
350 xfs_agino_t agino; /* inode # in allocation group */
351 xfs_agnumber_t agno; /* allocation group number */
352 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
353 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
354 int nirbuf; /* size of irbuf */
355 int ubcount; /* size of user's buffer */
356 struct xfs_bulkstat_agichunk ac;
357 int error = 0;
358
359 /*
360 * Get the last inode value, see if there's nothing to do.
361 */
362 agno = XFS_INO_TO_AGNO(mp, *lastinop);
363 agino = XFS_INO_TO_AGINO(mp, *lastinop);
364 if (agno >= mp->m_sb.sb_agcount ||
365 *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) {
366 *done = 1;
367 *ubcountp = 0;
368 return 0;
369 }
370
371 ubcount = *ubcountp; /* statstruct's */
372 ac.ac_ubuffer = &ubuffer;
373 ac.ac_ubleft = ubcount * statstruct_size; /* bytes */;
374 ac.ac_ubelem = 0;
375
376 *ubcountp = 0;
377 *done = 0;
378
379 irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP);
380 if (!irbuf)
381 return -ENOMEM;
382 nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf);
383
384 /*
385 * Loop over the allocation groups, starting from the last
386 * inode returned; 0 means start of the allocation group.
387 */
388 while (agno < mp->m_sb.sb_agcount) {
389 struct xfs_inobt_rec_incore *irbp = irbuf;
390 struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf;
391 bool end_of_ag = false;
392 int icount = 0;
393 int stat;
394
395 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
396 if (error)
397 break;
398 /*
399 * Allocate and initialize a btree cursor for ialloc btree.
400 */
401 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
402 XFS_BTNUM_INO);
403 if (agino > 0) {
404 /*
405 * In the middle of an allocation group, we need to get
406 * the remainder of the chunk we're in.
407 */
408 struct xfs_inobt_rec_incore r;
409
410 error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
411 if (error)
412 goto del_cursor;
413 if (icount) {
414 irbp->ir_startino = r.ir_startino;
415 irbp->ir_holemask = r.ir_holemask;
416 irbp->ir_count = r.ir_count;
417 irbp->ir_freecount = r.ir_freecount;
418 irbp->ir_free = r.ir_free;
419 irbp++;
420 }
421 /* Increment to the next record */
422 error = xfs_btree_increment(cur, 0, &stat);
423 } else {
424 /* Start of ag. Lookup the first inode chunk */
425 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat);
426 }
427 if (error || stat == 0) {
428 end_of_ag = true;
429 goto del_cursor;
430 }
431
432 /*
433 * Loop through inode btree records in this ag,
434 * until we run out of inodes or space in the buffer.
435 */
436 while (irbp < irbufend && icount < ubcount) {
437 struct xfs_inobt_rec_incore r;
438
439 error = xfs_inobt_get_rec(cur, &r, &stat);
440 if (error || stat == 0) {
441 end_of_ag = true;
442 goto del_cursor;
443 }
444
445 /*
446 * If this chunk has any allocated inodes, save it.
447 * Also start read-ahead now for this chunk.
448 */
449 if (r.ir_freecount < r.ir_count) {
450 xfs_bulkstat_ichunk_ra(mp, agno, &r);
451 irbp->ir_startino = r.ir_startino;
452 irbp->ir_holemask = r.ir_holemask;
453 irbp->ir_count = r.ir_count;
454 irbp->ir_freecount = r.ir_freecount;
455 irbp->ir_free = r.ir_free;
456 irbp++;
457 icount += r.ir_count - r.ir_freecount;
458 }
459 error = xfs_btree_increment(cur, 0, &stat);
460 if (error || stat == 0) {
461 end_of_ag = true;
462 goto del_cursor;
463 }
464 cond_resched();
465 }
466
467 /*
468 * Drop the btree buffers and the agi buffer as we can't hold any
469 * of the locks these represent when calling iget. If there is a
470 * pending error, then we are done.
471 */
472del_cursor:
473 xfs_btree_del_cursor(cur, error ?
474 XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
475 xfs_buf_relse(agbp);
476 if (error)
477 break;
478 /*
479 * Now format all the good inodes into the user's buffer. The
480 * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer
481 * for the next loop iteration.
482 */
483 irbufend = irbp;
484 for (irbp = irbuf;
485 irbp < irbufend && ac.ac_ubleft >= statstruct_size;
486 irbp++) {
487 error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
488 formatter, statstruct_size, &ac,
489 &agino);
490 if (error)
491 break;
492
493 cond_resched();
494 }
495
496 /*
497 * If we've run out of space or had a formatting error, we
498 * are now done
499 */
500 if (ac.ac_ubleft < statstruct_size || error)
501 break;
502
503 if (end_of_ag) {
504 agno++;
505 agino = 0;
506 }
507 }
508 /*
509 * Done, we're either out of filesystem or space to put the data.
510 */
511 kmem_free(irbuf);
512 *ubcountp = ac.ac_ubelem;
513
514 /*
515 * We found some inodes, so clear the error status and return them.
516 * The lastino pointer will point directly at the inode that triggered
517 * any error that occurred, so on the next call the error will be
518 * triggered again and propagated to userspace as there will be no
519 * formatted inodes in the buffer.
520 */
521 if (ac.ac_ubelem)
522 error = 0;
523
524 /*
525 * If we ran out of filesystem, lastino will point off the end of
526 * the filesystem so the next call will return immediately.
527 */
528 *lastinop = XFS_AGINO_TO_INO(mp, agno, agino);
529 if (agno >= mp->m_sb.sb_agcount)
530 *done = 1;
531
532 return error;
533}
534
535int
536xfs_inumbers_fmt(
537 void __user *ubuffer, /* buffer to write to */
538 const struct xfs_inogrp *buffer, /* buffer to read from */
539 long count, /* # of elements to read */
540 long *written) /* # of bytes written */
541{
542 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
543 return -EFAULT;
544 *written = count * sizeof(*buffer);
545 return 0;
546}
547
548/*
549 * Return inode number table for the filesystem.
550 */
551int /* error status */
552xfs_inumbers(
553 struct xfs_mount *mp,/* mount point for filesystem */
554 xfs_ino_t *lastino,/* last inode returned */
555 int *count,/* size of buffer/count returned */
556 void __user *ubuffer,/* buffer with inode descriptions */
557 inumbers_fmt_pf formatter)
558{
559 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
560 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
561 struct xfs_btree_cur *cur = NULL;
562 struct xfs_buf *agbp = NULL;
563 struct xfs_inogrp *buffer;
564 int bcount;
565 int left = *count;
566 int bufidx = 0;
567 int error = 0;
568
569 *count = 0;
570 if (agno >= mp->m_sb.sb_agcount ||
571 *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
572 return error;
573
574 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
575 buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP);
576 do {
577 struct xfs_inobt_rec_incore r;
578 int stat;
579
580 if (!agbp) {
581 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
582 if (error)
583 break;
584
585 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
586 XFS_BTNUM_INO);
587 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
588 &stat);
589 if (error)
590 break;
591 if (!stat)
592 goto next_ag;
593 }
594
595 error = xfs_inobt_get_rec(cur, &r, &stat);
596 if (error)
597 break;
598 if (!stat)
599 goto next_ag;
600
601 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
602 buffer[bufidx].xi_startino =
603 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
604 buffer[bufidx].xi_alloccount = r.ir_count - r.ir_freecount;
605 buffer[bufidx].xi_allocmask = ~r.ir_free;
606 if (++bufidx == bcount) {
607 long written;
608
609 error = formatter(ubuffer, buffer, bufidx, &written);
610 if (error)
611 break;
612 ubuffer += written;
613 *count += bufidx;
614 bufidx = 0;
615 }
616 if (!--left)
617 break;
618
619 error = xfs_btree_increment(cur, 0, &stat);
620 if (error)
621 break;
622 if (stat)
623 continue;
624
625next_ag:
626 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
627 cur = NULL;
628 xfs_buf_relse(agbp);
629 agbp = NULL;
630 agino = 0;
631 agno++;
632 } while (agno < mp->m_sb.sb_agcount);
633
634 if (!error) {
635 if (bufidx) {
636 long written;
637
638 error = formatter(ubuffer, buffer, bufidx, &written);
639 if (!error)
640 *count += bufidx;
641 }
642 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
643 }
644
645 kmem_free(buffer);
646 if (cur)
647 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
648 XFS_BTREE_NOERROR));
649 if (agbp)
650 xfs_buf_relse(agbp);
651
652 return error;
653}
1/*
2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_bit.h"
22#include "xfs_log.h"
23#include "xfs_inum.h"
24#include "xfs_trans.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
27#include "xfs_mount.h"
28#include "xfs_bmap_btree.h"
29#include "xfs_alloc_btree.h"
30#include "xfs_ialloc_btree.h"
31#include "xfs_dinode.h"
32#include "xfs_inode.h"
33#include "xfs_ialloc.h"
34#include "xfs_itable.h"
35#include "xfs_error.h"
36#include "xfs_btree.h"
37#include "xfs_trace.h"
38
39STATIC int
40xfs_internal_inum(
41 xfs_mount_t *mp,
42 xfs_ino_t ino)
43{
44 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
45 (xfs_sb_version_hasquota(&mp->m_sb) &&
46 (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino)));
47}
48
49/*
50 * Return stat information for one inode.
51 * Return 0 if ok, else errno.
52 */
53int
54xfs_bulkstat_one_int(
55 struct xfs_mount *mp, /* mount point for filesystem */
56 xfs_ino_t ino, /* inode to get data for */
57 void __user *buffer, /* buffer to place output in */
58 int ubsize, /* size of buffer */
59 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
60 int *ubused, /* bytes used by me */
61 int *stat) /* BULKSTAT_RV_... */
62{
63 struct xfs_icdinode *dic; /* dinode core info pointer */
64 struct xfs_inode *ip; /* incore inode pointer */
65 struct inode *inode;
66 struct xfs_bstat *buf; /* return buffer */
67 int error = 0; /* error value */
68
69 *stat = BULKSTAT_RV_NOTHING;
70
71 if (!buffer || xfs_internal_inum(mp, ino))
72 return XFS_ERROR(EINVAL);
73
74 buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
75 if (!buf)
76 return XFS_ERROR(ENOMEM);
77
78 error = xfs_iget(mp, NULL, ino,
79 XFS_IGET_UNTRUSTED, XFS_ILOCK_SHARED, &ip);
80 if (error) {
81 *stat = BULKSTAT_RV_NOTHING;
82 goto out_free;
83 }
84
85 ASSERT(ip != NULL);
86 ASSERT(ip->i_imap.im_blkno != 0);
87
88 dic = &ip->i_d;
89 inode = VFS_I(ip);
90
91 /* xfs_iget returns the following without needing
92 * further change.
93 */
94 buf->bs_nlink = dic->di_nlink;
95 buf->bs_projid_lo = dic->di_projid_lo;
96 buf->bs_projid_hi = dic->di_projid_hi;
97 buf->bs_ino = ino;
98 buf->bs_mode = dic->di_mode;
99 buf->bs_uid = dic->di_uid;
100 buf->bs_gid = dic->di_gid;
101 buf->bs_size = dic->di_size;
102
103 /*
104 * We need to read the timestamps from the Linux inode because
105 * the VFS keeps writing directly into the inode structure instead
106 * of telling us about the updates.
107 */
108 buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
109 buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
110 buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
111 buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
112 buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
113 buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
114
115 buf->bs_xflags = xfs_ip2xflags(ip);
116 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
117 buf->bs_extents = dic->di_nextents;
118 buf->bs_gen = dic->di_gen;
119 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
120 buf->bs_dmevmask = dic->di_dmevmask;
121 buf->bs_dmstate = dic->di_dmstate;
122 buf->bs_aextents = dic->di_anextents;
123 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
124
125 switch (dic->di_format) {
126 case XFS_DINODE_FMT_DEV:
127 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
128 buf->bs_blksize = BLKDEV_IOSIZE;
129 buf->bs_blocks = 0;
130 break;
131 case XFS_DINODE_FMT_LOCAL:
132 case XFS_DINODE_FMT_UUID:
133 buf->bs_rdev = 0;
134 buf->bs_blksize = mp->m_sb.sb_blocksize;
135 buf->bs_blocks = 0;
136 break;
137 case XFS_DINODE_FMT_EXTENTS:
138 case XFS_DINODE_FMT_BTREE:
139 buf->bs_rdev = 0;
140 buf->bs_blksize = mp->m_sb.sb_blocksize;
141 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
142 break;
143 }
144 xfs_iunlock(ip, XFS_ILOCK_SHARED);
145 IRELE(ip);
146
147 error = formatter(buffer, ubsize, ubused, buf);
148
149 if (!error)
150 *stat = BULKSTAT_RV_DIDONE;
151
152 out_free:
153 kmem_free(buf);
154 return error;
155}
156
157/* Return 0 on success or positive error */
158STATIC int
159xfs_bulkstat_one_fmt(
160 void __user *ubuffer,
161 int ubsize,
162 int *ubused,
163 const xfs_bstat_t *buffer)
164{
165 if (ubsize < sizeof(*buffer))
166 return XFS_ERROR(ENOMEM);
167 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
168 return XFS_ERROR(EFAULT);
169 if (ubused)
170 *ubused = sizeof(*buffer);
171 return 0;
172}
173
174int
175xfs_bulkstat_one(
176 xfs_mount_t *mp, /* mount point for filesystem */
177 xfs_ino_t ino, /* inode number to get data for */
178 void __user *buffer, /* buffer to place output in */
179 int ubsize, /* size of buffer */
180 int *ubused, /* bytes used by me */
181 int *stat) /* BULKSTAT_RV_... */
182{
183 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
184 xfs_bulkstat_one_fmt, ubused, stat);
185}
186
187#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
188
189/*
190 * Return stat information in bulk (by-inode) for the filesystem.
191 */
192int /* error status */
193xfs_bulkstat(
194 xfs_mount_t *mp, /* mount point for filesystem */
195 xfs_ino_t *lastinop, /* last inode returned */
196 int *ubcountp, /* size of buffer/count returned */
197 bulkstat_one_pf formatter, /* func that'd fill a single buf */
198 size_t statstruct_size, /* sizeof struct filling */
199 char __user *ubuffer, /* buffer with inode stats */
200 int *done) /* 1 if there are more stats to get */
201{
202 xfs_agblock_t agbno=0;/* allocation group block number */
203 xfs_buf_t *agbp; /* agi header buffer */
204 xfs_agi_t *agi; /* agi header data */
205 xfs_agino_t agino; /* inode # in allocation group */
206 xfs_agnumber_t agno; /* allocation group number */
207 int chunkidx; /* current index into inode chunk */
208 int clustidx; /* current index into inode cluster */
209 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
210 int end_of_ag; /* set if we've seen the ag end */
211 int error; /* error code */
212 int fmterror;/* bulkstat formatter result */
213 int i; /* loop index */
214 int icount; /* count of inodes good in irbuf */
215 size_t irbsize; /* size of irec buffer in bytes */
216 xfs_ino_t ino; /* inode number (filesystem) */
217 xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
218 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
219 xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
220 xfs_ino_t lastino; /* last inode number returned */
221 int nbcluster; /* # of blocks in a cluster */
222 int nicluster; /* # of inodes in a cluster */
223 int nimask; /* mask for inode clusters */
224 int nirbuf; /* size of irbuf */
225 int rval; /* return value error code */
226 int tmp; /* result value from btree calls */
227 int ubcount; /* size of user's buffer */
228 int ubleft; /* bytes left in user's buffer */
229 char __user *ubufp; /* pointer into user's buffer */
230 int ubelem; /* spaces used in user's buffer */
231 int ubused; /* bytes used by formatter */
232 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
233
234 /*
235 * Get the last inode value, see if there's nothing to do.
236 */
237 ino = (xfs_ino_t)*lastinop;
238 lastino = ino;
239 agno = XFS_INO_TO_AGNO(mp, ino);
240 agino = XFS_INO_TO_AGINO(mp, ino);
241 if (agno >= mp->m_sb.sb_agcount ||
242 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
243 *done = 1;
244 *ubcountp = 0;
245 return 0;
246 }
247 if (!ubcountp || *ubcountp <= 0) {
248 return EINVAL;
249 }
250 ubcount = *ubcountp; /* statstruct's */
251 ubleft = ubcount * statstruct_size; /* bytes */
252 *ubcountp = ubelem = 0;
253 *done = 0;
254 fmterror = 0;
255 ubufp = ubuffer;
256 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
257 mp->m_sb.sb_inopblock :
258 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
259 nimask = ~(nicluster - 1);
260 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
261 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
262 if (!irbuf)
263 return ENOMEM;
264
265 nirbuf = irbsize / sizeof(*irbuf);
266
267 /*
268 * Loop over the allocation groups, starting from the last
269 * inode returned; 0 means start of the allocation group.
270 */
271 rval = 0;
272 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
273 cond_resched();
274 bp = NULL;
275 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
276 if (error) {
277 /*
278 * Skip this allocation group and go to the next one.
279 */
280 agno++;
281 agino = 0;
282 continue;
283 }
284 agi = XFS_BUF_TO_AGI(agbp);
285 /*
286 * Allocate and initialize a btree cursor for ialloc btree.
287 */
288 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
289 irbp = irbuf;
290 irbufend = irbuf + nirbuf;
291 end_of_ag = 0;
292 /*
293 * If we're returning in the middle of an allocation group,
294 * we need to get the remainder of the chunk we're in.
295 */
296 if (agino > 0) {
297 xfs_inobt_rec_incore_t r;
298
299 /*
300 * Lookup the inode chunk that this inode lives in.
301 */
302 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE,
303 &tmp);
304 if (!error && /* no I/O error */
305 tmp && /* lookup succeeded */
306 /* got the record, should always work */
307 !(error = xfs_inobt_get_rec(cur, &r, &i)) &&
308 i == 1 &&
309 /* this is the right chunk */
310 agino < r.ir_startino + XFS_INODES_PER_CHUNK &&
311 /* lastino was not last in chunk */
312 (chunkidx = agino - r.ir_startino + 1) <
313 XFS_INODES_PER_CHUNK &&
314 /* there are some left allocated */
315 xfs_inobt_maskn(chunkidx,
316 XFS_INODES_PER_CHUNK - chunkidx) &
317 ~r.ir_free) {
318 /*
319 * Grab the chunk record. Mark all the
320 * uninteresting inodes (because they're
321 * before our start point) free.
322 */
323 for (i = 0; i < chunkidx; i++) {
324 if (XFS_INOBT_MASK(i) & ~r.ir_free)
325 r.ir_freecount++;
326 }
327 r.ir_free |= xfs_inobt_maskn(0, chunkidx);
328 irbp->ir_startino = r.ir_startino;
329 irbp->ir_freecount = r.ir_freecount;
330 irbp->ir_free = r.ir_free;
331 irbp++;
332 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
333 icount = XFS_INODES_PER_CHUNK - r.ir_freecount;
334 } else {
335 /*
336 * If any of those tests failed, bump the
337 * inode number (just in case).
338 */
339 agino++;
340 icount = 0;
341 }
342 /*
343 * In any case, increment to the next record.
344 */
345 if (!error)
346 error = xfs_btree_increment(cur, 0, &tmp);
347 } else {
348 /*
349 * Start of ag. Lookup the first inode chunk.
350 */
351 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
352 icount = 0;
353 }
354 /*
355 * Loop through inode btree records in this ag,
356 * until we run out of inodes or space in the buffer.
357 */
358 while (irbp < irbufend && icount < ubcount) {
359 xfs_inobt_rec_incore_t r;
360
361 /*
362 * Loop as long as we're unable to read the
363 * inode btree.
364 */
365 while (error) {
366 agino += XFS_INODES_PER_CHUNK;
367 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
368 be32_to_cpu(agi->agi_length))
369 break;
370 error = xfs_inobt_lookup(cur, agino,
371 XFS_LOOKUP_GE, &tmp);
372 cond_resched();
373 }
374 /*
375 * If ran off the end of the ag either with an error,
376 * or the normal way, set end and stop collecting.
377 */
378 if (error) {
379 end_of_ag = 1;
380 break;
381 }
382
383 error = xfs_inobt_get_rec(cur, &r, &i);
384 if (error || i == 0) {
385 end_of_ag = 1;
386 break;
387 }
388
389 /*
390 * If this chunk has any allocated inodes, save it.
391 * Also start read-ahead now for this chunk.
392 */
393 if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
394 /*
395 * Loop over all clusters in the next chunk.
396 * Do a readahead if there are any allocated
397 * inodes in that cluster.
398 */
399 agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
400 for (chunkidx = 0;
401 chunkidx < XFS_INODES_PER_CHUNK;
402 chunkidx += nicluster,
403 agbno += nbcluster) {
404 if (xfs_inobt_maskn(chunkidx, nicluster)
405 & ~r.ir_free)
406 xfs_btree_reada_bufs(mp, agno,
407 agbno, nbcluster);
408 }
409 irbp->ir_startino = r.ir_startino;
410 irbp->ir_freecount = r.ir_freecount;
411 irbp->ir_free = r.ir_free;
412 irbp++;
413 icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
414 }
415 /*
416 * Set agino to after this chunk and bump the cursor.
417 */
418 agino = r.ir_startino + XFS_INODES_PER_CHUNK;
419 error = xfs_btree_increment(cur, 0, &tmp);
420 cond_resched();
421 }
422 /*
423 * Drop the btree buffers and the agi buffer.
424 * We can't hold any of the locks these represent
425 * when calling iget.
426 */
427 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
428 xfs_buf_relse(agbp);
429 /*
430 * Now format all the good inodes into the user's buffer.
431 */
432 irbufend = irbp;
433 for (irbp = irbuf;
434 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
435 /*
436 * Now process this chunk of inodes.
437 */
438 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
439 XFS_BULKSTAT_UBLEFT(ubleft) &&
440 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
441 chunkidx++, clustidx++, agino++) {
442 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
443 /*
444 * Recompute agbno if this is the
445 * first inode of the cluster.
446 *
447 * Careful with clustidx. There can be
448 * multiple clusters per chunk, a single
449 * cluster per chunk or a cluster that has
450 * inodes represented from several different
451 * chunks (if blocksize is large).
452 *
453 * Because of this, the starting clustidx is
454 * initialized to zero in this loop but must
455 * later be reset after reading in the cluster
456 * buffer.
457 */
458 if ((chunkidx & (nicluster - 1)) == 0) {
459 agbno = XFS_AGINO_TO_AGBNO(mp,
460 irbp->ir_startino) +
461 ((chunkidx & nimask) >>
462 mp->m_sb.sb_inopblog);
463 }
464 ino = XFS_AGINO_TO_INO(mp, agno, agino);
465 /*
466 * Skip if this inode is free.
467 */
468 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
469 lastino = ino;
470 continue;
471 }
472 /*
473 * Count used inodes as free so we can tell
474 * when the chunk is used up.
475 */
476 irbp->ir_freecount++;
477
478 /*
479 * Get the inode and fill in a single buffer.
480 */
481 ubused = statstruct_size;
482 error = formatter(mp, ino, ubufp, ubleft,
483 &ubused, &fmterror);
484 if (fmterror == BULKSTAT_RV_NOTHING) {
485 if (error && error != ENOENT &&
486 error != EINVAL) {
487 ubleft = 0;
488 rval = error;
489 break;
490 }
491 lastino = ino;
492 continue;
493 }
494 if (fmterror == BULKSTAT_RV_GIVEUP) {
495 ubleft = 0;
496 ASSERT(error);
497 rval = error;
498 break;
499 }
500 if (ubufp)
501 ubufp += ubused;
502 ubleft -= ubused;
503 ubelem++;
504 lastino = ino;
505 }
506
507 cond_resched();
508 }
509
510 if (bp)
511 xfs_buf_relse(bp);
512
513 /*
514 * Set up for the next loop iteration.
515 */
516 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
517 if (end_of_ag) {
518 agno++;
519 agino = 0;
520 } else
521 agino = XFS_INO_TO_AGINO(mp, lastino);
522 } else
523 break;
524 }
525 /*
526 * Done, we're either out of filesystem or space to put the data.
527 */
528 kmem_free_large(irbuf);
529 *ubcountp = ubelem;
530 /*
531 * Found some inodes, return them now and return the error next time.
532 */
533 if (ubelem)
534 rval = 0;
535 if (agno >= mp->m_sb.sb_agcount) {
536 /*
537 * If we ran out of filesystem, mark lastino as off
538 * the end of the filesystem, so the next call
539 * will return immediately.
540 */
541 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
542 *done = 1;
543 } else
544 *lastinop = (xfs_ino_t)lastino;
545
546 return rval;
547}
548
549/*
550 * Return stat information in bulk (by-inode) for the filesystem.
551 * Special case for non-sequential one inode bulkstat.
552 */
553int /* error status */
554xfs_bulkstat_single(
555 xfs_mount_t *mp, /* mount point for filesystem */
556 xfs_ino_t *lastinop, /* inode to return */
557 char __user *buffer, /* buffer with inode stats */
558 int *done) /* 1 if there are more stats to get */
559{
560 int count; /* count value for bulkstat call */
561 int error; /* return value */
562 xfs_ino_t ino; /* filesystem inode number */
563 int res; /* result from bs1 */
564
565 /*
566 * note that requesting valid inode numbers which are not allocated
567 * to inodes will most likely cause xfs_itobp to generate warning
568 * messages about bad magic numbers. This is ok. The fact that
569 * the inode isn't actually an inode is handled by the
570 * error check below. Done this way to make the usual case faster
571 * at the expense of the error case.
572 */
573
574 ino = (xfs_ino_t)*lastinop;
575 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), 0, &res);
576 if (error) {
577 /*
578 * Special case way failed, do it the "long" way
579 * to see if that works.
580 */
581 (*lastinop)--;
582 count = 1;
583 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
584 sizeof(xfs_bstat_t), buffer, done))
585 return error;
586 if (count == 0 || (xfs_ino_t)*lastinop != ino)
587 return error == EFSCORRUPTED ?
588 XFS_ERROR(EINVAL) : error;
589 else
590 return 0;
591 }
592 *done = 0;
593 return 0;
594}
595
596int
597xfs_inumbers_fmt(
598 void __user *ubuffer, /* buffer to write to */
599 const xfs_inogrp_t *buffer, /* buffer to read from */
600 long count, /* # of elements to read */
601 long *written) /* # of bytes written */
602{
603 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
604 return -EFAULT;
605 *written = count * sizeof(*buffer);
606 return 0;
607}
608
609/*
610 * Return inode number table for the filesystem.
611 */
612int /* error status */
613xfs_inumbers(
614 xfs_mount_t *mp, /* mount point for filesystem */
615 xfs_ino_t *lastino, /* last inode returned */
616 int *count, /* size of buffer/count returned */
617 void __user *ubuffer,/* buffer with inode descriptions */
618 inumbers_fmt_pf formatter)
619{
620 xfs_buf_t *agbp;
621 xfs_agino_t agino;
622 xfs_agnumber_t agno;
623 int bcount;
624 xfs_inogrp_t *buffer;
625 int bufidx;
626 xfs_btree_cur_t *cur;
627 int error;
628 xfs_inobt_rec_incore_t r;
629 int i;
630 xfs_ino_t ino;
631 int left;
632 int tmp;
633
634 ino = (xfs_ino_t)*lastino;
635 agno = XFS_INO_TO_AGNO(mp, ino);
636 agino = XFS_INO_TO_AGINO(mp, ino);
637 left = *count;
638 *count = 0;
639 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
640 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
641 error = bufidx = 0;
642 cur = NULL;
643 agbp = NULL;
644 while (left > 0 && agno < mp->m_sb.sb_agcount) {
645 if (agbp == NULL) {
646 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
647 if (error) {
648 /*
649 * If we can't read the AGI of this ag,
650 * then just skip to the next one.
651 */
652 ASSERT(cur == NULL);
653 agbp = NULL;
654 agno++;
655 agino = 0;
656 continue;
657 }
658 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
659 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
660 &tmp);
661 if (error) {
662 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
663 cur = NULL;
664 xfs_buf_relse(agbp);
665 agbp = NULL;
666 /*
667 * Move up the last inode in the current
668 * chunk. The lookup_ge will always get
669 * us the first inode in the next chunk.
670 */
671 agino += XFS_INODES_PER_CHUNK - 1;
672 continue;
673 }
674 }
675 error = xfs_inobt_get_rec(cur, &r, &i);
676 if (error || i == 0) {
677 xfs_buf_relse(agbp);
678 agbp = NULL;
679 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
680 cur = NULL;
681 agno++;
682 agino = 0;
683 continue;
684 }
685 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
686 buffer[bufidx].xi_startino =
687 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
688 buffer[bufidx].xi_alloccount =
689 XFS_INODES_PER_CHUNK - r.ir_freecount;
690 buffer[bufidx].xi_allocmask = ~r.ir_free;
691 bufidx++;
692 left--;
693 if (bufidx == bcount) {
694 long written;
695 if (formatter(ubuffer, buffer, bufidx, &written)) {
696 error = XFS_ERROR(EFAULT);
697 break;
698 }
699 ubuffer += written;
700 *count += bufidx;
701 bufidx = 0;
702 }
703 if (left) {
704 error = xfs_btree_increment(cur, 0, &tmp);
705 if (error) {
706 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
707 cur = NULL;
708 xfs_buf_relse(agbp);
709 agbp = NULL;
710 /*
711 * The agino value has already been bumped.
712 * Just try to skip up to it.
713 */
714 agino += XFS_INODES_PER_CHUNK;
715 continue;
716 }
717 }
718 }
719 if (!error) {
720 if (bufidx) {
721 long written;
722 if (formatter(ubuffer, buffer, bufidx, &written))
723 error = XFS_ERROR(EFAULT);
724 else
725 *count += bufidx;
726 }
727 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
728 }
729 kmem_free(buffer);
730 if (cur)
731 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
732 XFS_BTREE_NOERROR));
733 if (agbp)
734 xfs_buf_relse(agbp);
735 return error;
736}