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Linux 2.6.13-rc4
[linux-2.6/next.git] / fs / xfs / xfs_itable.c
blob8fbc8d3781885be9db2a51b21650578119c30dbe
1 /*
2 * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32
33 #include "xfs.h"
34 #include "xfs_macros.h"
35 #include "xfs_types.h"
36 #include "xfs_inum.h"
37 #include "xfs_log.h"
38 #include "xfs_trans.h"
39 #include "xfs_sb.h"
40 #include "xfs_dir.h"
41 #include "xfs_dir2.h"
42 #include "xfs_dmapi.h"
43 #include "xfs_mount.h"
44 #include "xfs_ag.h"
45 #include "xfs_alloc_btree.h"
46 #include "xfs_bmap_btree.h"
47 #include "xfs_ialloc_btree.h"
48 #include "xfs_btree.h"
49 #include "xfs_attr_sf.h"
50 #include "xfs_dir_sf.h"
51 #include "xfs_dir2_sf.h"
52 #include "xfs_dinode.h"
53 #include "xfs_inode.h"
54 #include "xfs_ialloc.h"
55 #include "xfs_itable.h"
56 #include "xfs_error.h"
57
58 #ifndef HAVE_USERACC
59 #define useracc(ubuffer, size, flags, foo) (0)
60 #define unuseracc(ubuffer, size, flags)
61 #endif
62
63 STATIC int
64 xfs_bulkstat_one_iget(
65 xfs_mount_t *mp, /* mount point for filesystem */
66 xfs_ino_t ino, /* inode number to get data for */
67 xfs_daddr_t bno, /* starting bno of inode cluster */
68 xfs_bstat_t *buf, /* return buffer */
69 int *stat) /* BULKSTAT_RV_... */
70 {
71 xfs_dinode_core_t *dic; /* dinode core info pointer */
72 xfs_inode_t *ip; /* incore inode pointer */
73 int error;
74
75 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, bno);
76 if (error) {
77 *stat = BULKSTAT_RV_NOTHING;
78 return error;
79 }
80
81 ASSERT(ip != NULL);
82 ASSERT(ip->i_blkno != (xfs_daddr_t)0);
83 if (ip->i_d.di_mode == 0) {
84 *stat = BULKSTAT_RV_NOTHING;
85 error = XFS_ERROR(ENOENT);
86 goto out_iput;
87 }
88
89 dic = &ip->i_d;
90
91 /* xfs_iget returns the following without needing
92 * further change.
93 */
94 buf->bs_nlink = dic->di_nlink;
95 buf->bs_projid = dic->di_projid;
96 buf->bs_ino = ino;
97 buf->bs_mode = dic->di_mode;
98 buf->bs_uid = dic->di_uid;
99 buf->bs_gid = dic->di_gid;
100 buf->bs_size = dic->di_size;
101 buf->bs_atime.tv_sec = dic->di_atime.t_sec;
102 buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
103 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
104 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
105 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
106 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
107 buf->bs_xflags = xfs_ip2xflags(ip);
108 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
109 buf->bs_extents = dic->di_nextents;
110 buf->bs_gen = dic->di_gen;
111 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
112 buf->bs_dmevmask = dic->di_dmevmask;
113 buf->bs_dmstate = dic->di_dmstate;
114 buf->bs_aextents = dic->di_anextents;
115
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;
120 buf->bs_blocks = 0;
121 break;
122 case XFS_DINODE_FMT_LOCAL:
123 case XFS_DINODE_FMT_UUID:
124 buf->bs_rdev = 0;
125 buf->bs_blksize = mp->m_sb.sb_blocksize;
126 buf->bs_blocks = 0;
127 break;
128 case XFS_DINODE_FMT_EXTENTS:
129 case XFS_DINODE_FMT_BTREE:
130 buf->bs_rdev = 0;
131 buf->bs_blksize = mp->m_sb.sb_blocksize;
132 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
133 break;
134 }
135
136 out_iput:
137 xfs_iput(ip, XFS_ILOCK_SHARED);
138 return error;
139 }
140
141 STATIC int
142 xfs_bulkstat_one_dinode(
143 xfs_mount_t *mp, /* mount point for filesystem */
144 xfs_ino_t ino, /* inode number to get data for */
145 xfs_dinode_t *dip, /* dinode inode pointer */
146 xfs_bstat_t *buf) /* return buffer */
147 {
148 xfs_dinode_core_t *dic; /* dinode core info pointer */
149
150 dic = &dip->di_core;
151
152 /*
153 * The inode format changed when we moved the link count and
154 * made it 32 bits long. If this is an old format inode,
155 * convert it in memory to look like a new one. If it gets
156 * flushed to disk we will convert back before flushing or
157 * logging it. We zero out the new projid field and the old link
158 * count field. We'll handle clearing the pad field (the remains
159 * of the old uuid field) when we actually convert the inode to
160 * the new format. We don't change the version number so that we
161 * can distinguish this from a real new format inode.
162 */
163 if (INT_GET(dic->di_version, ARCH_CONVERT) == XFS_DINODE_VERSION_1) {
164 buf->bs_nlink = INT_GET(dic->di_onlink, ARCH_CONVERT);
165 buf->bs_projid = 0;
166 } else {
167 buf->bs_nlink = INT_GET(dic->di_nlink, ARCH_CONVERT);
168 buf->bs_projid = INT_GET(dic->di_projid, ARCH_CONVERT);
169 }
170
171 buf->bs_ino = ino;
172 buf->bs_mode = INT_GET(dic->di_mode, ARCH_CONVERT);
173 buf->bs_uid = INT_GET(dic->di_uid, ARCH_CONVERT);
174 buf->bs_gid = INT_GET(dic->di_gid, ARCH_CONVERT);
175 buf->bs_size = INT_GET(dic->di_size, ARCH_CONVERT);
176 buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, ARCH_CONVERT);
177 buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, ARCH_CONVERT);
178 buf->bs_mtime.tv_sec = INT_GET(dic->di_mtime.t_sec, ARCH_CONVERT);
179 buf->bs_mtime.tv_nsec = INT_GET(dic->di_mtime.t_nsec, ARCH_CONVERT);
180 buf->bs_ctime.tv_sec = INT_GET(dic->di_ctime.t_sec, ARCH_CONVERT);
181 buf->bs_ctime.tv_nsec = INT_GET(dic->di_ctime.t_nsec, ARCH_CONVERT);
182 buf->bs_xflags = xfs_dic2xflags(dic);
183 buf->bs_extsize = INT_GET(dic->di_extsize, ARCH_CONVERT) << mp->m_sb.sb_blocklog;
184 buf->bs_extents = INT_GET(dic->di_nextents, ARCH_CONVERT);
185 buf->bs_gen = INT_GET(dic->di_gen, ARCH_CONVERT);
186 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
187 buf->bs_dmevmask = INT_GET(dic->di_dmevmask, ARCH_CONVERT);
188 buf->bs_dmstate = INT_GET(dic->di_dmstate, ARCH_CONVERT);
189 buf->bs_aextents = INT_GET(dic->di_anextents, ARCH_CONVERT);
190
191 switch (INT_GET(dic->di_format, ARCH_CONVERT)) {
192 case XFS_DINODE_FMT_DEV:
193 buf->bs_rdev = INT_GET(dip->di_u.di_dev, ARCH_CONVERT);
194 buf->bs_blksize = BLKDEV_IOSIZE;
195 buf->bs_blocks = 0;
196 break;
197 case XFS_DINODE_FMT_LOCAL:
198 case XFS_DINODE_FMT_UUID:
199 buf->bs_rdev = 0;
200 buf->bs_blksize = mp->m_sb.sb_blocksize;
201 buf->bs_blocks = 0;
202 break;
203 case XFS_DINODE_FMT_EXTENTS:
204 case XFS_DINODE_FMT_BTREE:
205 buf->bs_rdev = 0;
206 buf->bs_blksize = mp->m_sb.sb_blocksize;
207 buf->bs_blocks = INT_GET(dic->di_nblocks, ARCH_CONVERT);
208 break;
209 }
210
211 return 0;
212 }
213
214 /*
215 * Return stat information for one inode.
216 * Return 0 if ok, else errno.
217 */
218 int /* error status */
219 xfs_bulkstat_one(
220 xfs_mount_t *mp, /* mount point for filesystem */
221 xfs_ino_t ino, /* inode number to get data for */
222 void __user *buffer, /* buffer to place output in */
223 int ubsize, /* size of buffer */
224 void *private_data, /* my private data */
225 xfs_daddr_t bno, /* starting bno of inode cluster */
226 int *ubused, /* bytes used by me */
227 void *dibuff, /* on-disk inode buffer */
228 int *stat) /* BULKSTAT_RV_... */
229 {
230 xfs_bstat_t *buf; /* return buffer */
231 int error = 0; /* error value */
232 xfs_dinode_t *dip; /* dinode inode pointer */
233
234 dip = (xfs_dinode_t *)dibuff;
235
236 if (!buffer || ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
237 (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
238 (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))) {
239 *stat = BULKSTAT_RV_NOTHING;
240 return XFS_ERROR(EINVAL);
241 }
242 if (ubsize < sizeof(*buf)) {
243 *stat = BULKSTAT_RV_NOTHING;
244 return XFS_ERROR(ENOMEM);
245 }
246
247 buf = kmem_alloc(sizeof(*buf), KM_SLEEP);
248
249 if (dip == NULL) {
250 /* We're not being passed a pointer to a dinode. This happens
251 * if BULKSTAT_FG_IGET is selected. Do the iget.
252 */
253 error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat);
254 if (error)
255 goto out_free;
256 } else {
257 xfs_bulkstat_one_dinode(mp, ino, dip, buf);
258 }
259
260 if (copy_to_user(buffer, buf, sizeof(*buf))) {
261 *stat = BULKSTAT_RV_NOTHING;
262 error = EFAULT;
263 goto out_free;
264 }
265
266 *stat = BULKSTAT_RV_DIDONE;
267 if (ubused)
268 *ubused = sizeof(*buf);
269
270 out_free:
271 kmem_free(buf, sizeof(*buf));
272 return error;
273 }
274
275 /*
276 * Return stat information in bulk (by-inode) for the filesystem.
277 */
278 int /* error status */
279 xfs_bulkstat(
280 xfs_mount_t *mp, /* mount point for filesystem */
281 xfs_ino_t *lastinop, /* last inode returned */
282 int *ubcountp, /* size of buffer/count returned */
283 bulkstat_one_pf formatter, /* func that'd fill a single buf */
284 void *private_data,/* private data for formatter */
285 size_t statstruct_size, /* sizeof struct filling */
286 char __user *ubuffer, /* buffer with inode stats */
287 int flags, /* defined in xfs_itable.h */
288 int *done) /* 1 if there're more stats to get */
289 {
290 xfs_agblock_t agbno=0;/* allocation group block number */
291 xfs_buf_t *agbp; /* agi header buffer */
292 xfs_agi_t *agi; /* agi header data */
293 xfs_agino_t agino; /* inode # in allocation group */
294 xfs_agnumber_t agno; /* allocation group number */
295 xfs_daddr_t bno; /* inode cluster start daddr */
296 int chunkidx; /* current index into inode chunk */
297 int clustidx; /* current index into inode cluster */
298 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
299 int end_of_ag; /* set if we've seen the ag end */
300 int error; /* error code */
301 int fmterror;/* bulkstat formatter result */
302 __int32_t gcnt; /* current btree rec's count */
303 xfs_inofree_t gfree; /* current btree rec's free mask */
304 xfs_agino_t gino; /* current btree rec's start inode */
305 int i; /* loop index */
306 int icount; /* count of inodes good in irbuf */
307 xfs_ino_t ino; /* inode number (filesystem) */
308 xfs_inobt_rec_t *irbp; /* current irec buffer pointer */
309 xfs_inobt_rec_t *irbuf; /* start of irec buffer */
310 xfs_inobt_rec_t *irbufend; /* end of good irec buffer entries */
311 xfs_ino_t lastino=0; /* last inode number returned */
312 int nbcluster; /* # of blocks in a cluster */
313 int nicluster; /* # of inodes in a cluster */
314 int nimask; /* mask for inode clusters */
315 int nirbuf; /* size of irbuf */
316 int rval; /* return value error code */
317 int tmp; /* result value from btree calls */
318 int ubcount; /* size of user's buffer */
319 int ubleft; /* bytes left in user's buffer */
320 char __user *ubufp; /* pointer into user's buffer */
321 int ubelem; /* spaces used in user's buffer */
322 int ubused; /* bytes used by formatter */
323 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
324 xfs_dinode_t *dip; /* ptr into bp for specific inode */
325 xfs_inode_t *ip; /* ptr to in-core inode struct */
326
327 /*
328 * Get the last inode value, see if there's nothing to do.
329 */
330 ino = (xfs_ino_t)*lastinop;
331 dip = NULL;
332 agno = XFS_INO_TO_AGNO(mp, ino);
333 agino = XFS_INO_TO_AGINO(mp, ino);
334 if (agno >= mp->m_sb.sb_agcount ||
335 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
336 *done = 1;
337 *ubcountp = 0;
338 return 0;
339 }
340 ubcount = *ubcountp; /* statstruct's */
341 ubleft = ubcount * statstruct_size; /* bytes */
342 *ubcountp = ubelem = 0;
343 *done = 0;
344 fmterror = 0;
345 ubufp = ubuffer;
346 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
347 mp->m_sb.sb_inopblock :
348 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
349 nimask = ~(nicluster - 1);
350 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
351 /*
352 * Lock down the user's buffer. If a buffer was not sent, as in the case
353 * disk quota code calls here, we skip this.
354 */
355 if (ubuffer &&
356 (error = useracc(ubuffer, ubcount * statstruct_size,
357 (B_READ|B_PHYS), NULL))) {
358 return error;
359 }
360 /*
361 * Allocate a page-sized buffer for inode btree records.
362 * We could try allocating something smaller, but for normal
363 * calls we'll always (potentially) need the whole page.
364 */
365 irbuf = kmem_alloc(NBPC, KM_SLEEP);
366 nirbuf = NBPC / sizeof(*irbuf);
367 /*
368 * Loop over the allocation groups, starting from the last
369 * inode returned; 0 means start of the allocation group.
370 */
371 rval = 0;
372 while (ubleft >= statstruct_size && agno < mp->m_sb.sb_agcount) {
373 bp = NULL;
374 down_read(&mp->m_peraglock);
375 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
376 up_read(&mp->m_peraglock);
377 if (error) {
378 /*
379 * Skip this allocation group and go to the next one.
380 */
381 agno++;
382 agino = 0;
383 continue;
384 }
385 agi = XFS_BUF_TO_AGI(agbp);
386 /*
387 * Allocate and initialize a btree cursor for ialloc btree.
388 */
389 cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO,
390 (xfs_inode_t *)0, 0);
391 irbp = irbuf;
392 irbufend = irbuf + nirbuf;
393 end_of_ag = 0;
394 /*
395 * If we're returning in the middle of an allocation group,
396 * we need to get the remainder of the chunk we're in.
397 */
398 if (agino > 0) {
399 /*
400 * Lookup the inode chunk that this inode lives in.
401 */
402 error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
403 if (!error && /* no I/O error */
404 tmp && /* lookup succeeded */
405 /* got the record, should always work */
406 !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
407 &gfree, &i)) &&
408 i == 1 &&
409 /* this is the right chunk */
410 agino < gino + XFS_INODES_PER_CHUNK &&
411 /* lastino was not last in chunk */
412 (chunkidx = agino - gino + 1) <
413 XFS_INODES_PER_CHUNK &&
414 /* there are some left allocated */
415 XFS_INOBT_MASKN(chunkidx,
416 XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
417 /*
418 * Grab the chunk record. Mark all the
419 * uninteresting inodes (because they're
420 * before our start point) free.
421 */
422 for (i = 0; i < chunkidx; i++) {
423 if (XFS_INOBT_MASK(i) & ~gfree)
424 gcnt++;
425 }
426 gfree |= XFS_INOBT_MASKN(0, chunkidx);
427 INT_SET(irbp->ir_startino, ARCH_CONVERT, gino);
428 INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt);
429 INT_SET(irbp->ir_free, ARCH_CONVERT, gfree);
430 irbp++;
431 agino = gino + XFS_INODES_PER_CHUNK;
432 icount = XFS_INODES_PER_CHUNK - gcnt;
433 } else {
434 /*
435 * If any of those tests failed, bump the
436 * inode number (just in case).
437 */
438 agino++;
439 icount = 0;
440 }
441 /*
442 * In any case, increment to the next record.
443 */
444 if (!error)
445 error = xfs_inobt_increment(cur, 0, &tmp);
446 } else {
447 /*
448 * Start of ag. Lookup the first inode chunk.
449 */
450 error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
451 icount = 0;
452 }
453 /*
454 * Loop through inode btree records in this ag,
455 * until we run out of inodes or space in the buffer.
456 */
457 while (irbp < irbufend && icount < ubcount) {
458 /*
459 * Loop as long as we're unable to read the
460 * inode btree.
461 */
462 while (error) {
463 agino += XFS_INODES_PER_CHUNK;
464 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
465 INT_GET(agi->agi_length, ARCH_CONVERT))
466 break;
467 error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
468 &tmp);
469 }
470 /*
471 * If ran off the end of the ag either with an error,
472 * or the normal way, set end and stop collecting.
473 */
474 if (error ||
475 (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
476 &gfree, &i)) ||
477 i == 0) {
478 end_of_ag = 1;
479 break;
480 }
481 /*
482 * If this chunk has any allocated inodes, save it.
483 */
484 if (gcnt < XFS_INODES_PER_CHUNK) {
485 INT_SET(irbp->ir_startino, ARCH_CONVERT, gino);
486 INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt);
487 INT_SET(irbp->ir_free, ARCH_CONVERT, gfree);
488 irbp++;
489 icount += XFS_INODES_PER_CHUNK - gcnt;
490 }
491 /*
492 * Set agino to after this chunk and bump the cursor.
493 */
494 agino = gino + XFS_INODES_PER_CHUNK;
495 error = xfs_inobt_increment(cur, 0, &tmp);
496 }
497 /*
498 * Drop the btree buffers and the agi buffer.
499 * We can't hold any of the locks these represent
500 * when calling iget.
501 */
502 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
503 xfs_buf_relse(agbp);
504 /*
505 * Now format all the good inodes into the user's buffer.
506 */
507 irbufend = irbp;
508 for (irbp = irbuf;
509 irbp < irbufend && ubleft >= statstruct_size; irbp++) {
510 /*
511 * Read-ahead the next chunk's worth of inodes.
512 */
513 if (&irbp[1] < irbufend) {
514 /*
515 * Loop over all clusters in the next chunk.
516 * Do a readahead if there are any allocated
517 * inodes in that cluster.
518 */
519 for (agbno = XFS_AGINO_TO_AGBNO(mp,
520 INT_GET(irbp[1].ir_startino, ARCH_CONVERT)),
521 chunkidx = 0;
522 chunkidx < XFS_INODES_PER_CHUNK;
523 chunkidx += nicluster,
524 agbno += nbcluster) {
525 if (XFS_INOBT_MASKN(chunkidx,
526 nicluster) &
527 ~(INT_GET(irbp[1].ir_free, ARCH_CONVERT)))
528 xfs_btree_reada_bufs(mp, agno,
529 agbno, nbcluster);
530 }
531 }
532 /*
533 * Now process this chunk of inodes.
534 */
535 for (agino = INT_GET(irbp->ir_startino, ARCH_CONVERT), chunkidx = 0, clustidx = 0;
536 ubleft > 0 &&
537 INT_GET(irbp->ir_freecount, ARCH_CONVERT) < XFS_INODES_PER_CHUNK;
538 chunkidx++, clustidx++, agino++) {
539 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
540 /*
541 * Recompute agbno if this is the
542 * first inode of the cluster.
543 *
544 * Careful with clustidx. There can be
545 * multple clusters per chunk, a single
546 * cluster per chunk or a cluster that has
547 * inodes represented from several different
548 * chunks (if blocksize is large).
549 *
550 * Because of this, the starting clustidx is
551 * initialized to zero in this loop but must
552 * later be reset after reading in the cluster
553 * buffer.
554 */
555 if ((chunkidx & (nicluster - 1)) == 0) {
556 agbno = XFS_AGINO_TO_AGBNO(mp,
557 INT_GET(irbp->ir_startino, ARCH_CONVERT)) +
558 ((chunkidx & nimask) >>
559 mp->m_sb.sb_inopblog);
560
561 if (flags & BULKSTAT_FG_QUICK) {
562 ino = XFS_AGINO_TO_INO(mp, agno,
563 agino);
564 bno = XFS_AGB_TO_DADDR(mp, agno,
565 agbno);
566
567 /*
568 * Get the inode cluster buffer
569 */
570 ASSERT(xfs_inode_zone != NULL);
571 ip = kmem_zone_zalloc(xfs_inode_zone,
572 KM_SLEEP);
573 ip->i_ino = ino;
574 ip->i_mount = mp;
575 if (bp)
576 xfs_buf_relse(bp);
577 error = xfs_itobp(mp, NULL, ip,
578 &dip, &bp, bno);
579 if (!error)
580 clustidx = ip->i_boffset / mp->m_sb.sb_inodesize;
581 kmem_zone_free(xfs_inode_zone, ip);
582 if (XFS_TEST_ERROR(error != 0,
583 mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
584 XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
585 bp = NULL;
586 break;
587 }
588 }
589 }
590 /*
591 * Skip if this inode is free.
592 */
593 if (XFS_INOBT_MASK(chunkidx) & INT_GET(irbp->ir_free, ARCH_CONVERT))
594 continue;
595 /*
596 * Count used inodes as free so we can tell
597 * when the chunk is used up.
598 */
599 INT_MOD(irbp->ir_freecount, ARCH_CONVERT, +1);
600 ino = XFS_AGINO_TO_INO(mp, agno, agino);
601 bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
602 if (flags & BULKSTAT_FG_QUICK) {
603 dip = (xfs_dinode_t *)xfs_buf_offset(bp,
604 (clustidx << mp->m_sb.sb_inodelog));
605
606 if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT)
607 != XFS_DINODE_MAGIC
608 || !XFS_DINODE_GOOD_VERSION(
609 INT_GET(dip->di_core.di_version, ARCH_CONVERT)))
610 continue;
611 }
612
613 /*
614 * Get the inode and fill in a single buffer.
615 * BULKSTAT_FG_QUICK uses dip to fill it in.
616 * BULKSTAT_FG_IGET uses igets.
617 * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
618 * This is also used to count inodes/blks, etc
619 * in xfs_qm_quotacheck.
620 */
621 ubused = statstruct_size;
622 error = formatter(mp, ino, ubufp,
623 ubleft, private_data,
624 bno, &ubused, dip, &fmterror);
625 if (fmterror == BULKSTAT_RV_NOTHING) {
626 if (error == ENOMEM)
627 ubleft = 0;
628 continue;
629 }
630 if (fmterror == BULKSTAT_RV_GIVEUP) {
631 ubleft = 0;
632 ASSERT(error);
633 rval = error;
634 break;
635 }
636 if (ubufp)
637 ubufp += ubused;
638 ubleft -= ubused;
639 ubelem++;
640 lastino = ino;
641 }
642 }
643
644 if (bp)
645 xfs_buf_relse(bp);
646
647 /*
648 * Set up for the next loop iteration.
649 */
650 if (ubleft > 0) {
651 if (end_of_ag) {
652 agno++;
653 agino = 0;
654 } else
655 agino = XFS_INO_TO_AGINO(mp, lastino);
656 } else
657 break;
658 }
659 /*
660 * Done, we're either out of filesystem or space to put the data.
661 */
662 kmem_free(irbuf, NBPC);
663 if (ubuffer)
664 unuseracc(ubuffer, ubcount * statstruct_size, (B_READ|B_PHYS));
665 *ubcountp = ubelem;
666 if (agno >= mp->m_sb.sb_agcount) {
667 /*
668 * If we ran out of filesystem, mark lastino as off
669 * the end of the filesystem, so the next call
670 * will return immediately.
671 */
672 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
673 *done = 1;
674 } else
675 *lastinop = (xfs_ino_t)lastino;
676
677 return rval;
678 }
679
680 /*
681 * Return stat information in bulk (by-inode) for the filesystem.
682 * Special case for non-sequential one inode bulkstat.
683 */
684 int /* error status */
685 xfs_bulkstat_single(
686 xfs_mount_t *mp, /* mount point for filesystem */
687 xfs_ino_t *lastinop, /* inode to return */
688 char __user *buffer, /* buffer with inode stats */
689 int *done) /* 1 if there're more stats to get */
690 {
691 int count; /* count value for bulkstat call */
692 int error; /* return value */
693 xfs_ino_t ino; /* filesystem inode number */
694 int res; /* result from bs1 */
695
696 /*
697 * note that requesting valid inode numbers which are not allocated
698 * to inodes will most likely cause xfs_itobp to generate warning
699 * messages about bad magic numbers. This is ok. The fact that
700 * the inode isn't actually an inode is handled by the
701 * error check below. Done this way to make the usual case faster
702 * at the expense of the error case.
703 */
704
705 ino = (xfs_ino_t)*lastinop;
706 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
707 NULL, 0, NULL, NULL, &res);
708 if (error) {
709 /*
710 * Special case way failed, do it the "long" way
711 * to see if that works.
712 */
713 (*lastinop)--;
714 count = 1;
715 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
716 NULL, sizeof(xfs_bstat_t), buffer,
717 BULKSTAT_FG_IGET, done))
718 return error;
719 if (count == 0 || (xfs_ino_t)*lastinop != ino)
720 return error == EFSCORRUPTED ?
721 XFS_ERROR(EINVAL) : error;
722 else
723 return 0;
724 }
725 *done = 0;
726 return 0;
727 }
728
729 /*
730 * Return inode number table for the filesystem.
731 */
732 int /* error status */
733 xfs_inumbers(
734 xfs_mount_t *mp, /* mount point for filesystem */
735 xfs_ino_t *lastino, /* last inode returned */
736 int *count, /* size of buffer/count returned */
737 xfs_inogrp_t __user *ubuffer)/* buffer with inode descriptions */
738 {
739 xfs_buf_t *agbp;
740 xfs_agino_t agino;
741 xfs_agnumber_t agno;
742 int bcount;
743 xfs_inogrp_t *buffer;
744 int bufidx;
745 xfs_btree_cur_t *cur;
746 int error;
747 __int32_t gcnt;
748 xfs_inofree_t gfree;
749 xfs_agino_t gino;
750 int i;
751 xfs_ino_t ino;
752 int left;
753 int tmp;
754
755 ino = (xfs_ino_t)*lastino;
756 agno = XFS_INO_TO_AGNO(mp, ino);
757 agino = XFS_INO_TO_AGINO(mp, ino);
758 left = *count;
759 *count = 0;
760 bcount = MIN(left, (int)(NBPP / sizeof(*buffer)));
761 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
762 error = bufidx = 0;
763 cur = NULL;
764 agbp = NULL;
765 while (left > 0 && agno < mp->m_sb.sb_agcount) {
766 if (agbp == NULL) {
767 down_read(&mp->m_peraglock);
768 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
769 up_read(&mp->m_peraglock);
770 if (error) {
771 /*
772 * If we can't read the AGI of this ag,
773 * then just skip to the next one.
774 */
775 ASSERT(cur == NULL);
776 agbp = NULL;
777 agno++;
778 agino = 0;
779 continue;
780 }
781 cur = xfs_btree_init_cursor(mp, NULL, agbp, agno,
782 XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
783 error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
784 if (error) {
785 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
786 cur = NULL;
787 xfs_buf_relse(agbp);
788 agbp = NULL;
789 /*
790 * Move up the the last inode in the current
791 * chunk. The lookup_ge will always get
792 * us the first inode in the next chunk.
793 */
794 agino += XFS_INODES_PER_CHUNK - 1;
795 continue;
796 }
797 }
798 if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
799 &i)) ||
800 i == 0) {
801 xfs_buf_relse(agbp);
802 agbp = NULL;
803 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
804 cur = NULL;
805 agno++;
806 agino = 0;
807 continue;
808 }
809 agino = gino + XFS_INODES_PER_CHUNK - 1;
810 buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
811 buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
812 buffer[bufidx].xi_allocmask = ~gfree;
813 bufidx++;
814 left--;
815 if (bufidx == bcount) {
816 if (copy_to_user(ubuffer, buffer,
817 bufidx * sizeof(*buffer))) {
818 error = XFS_ERROR(EFAULT);
819 break;
820 }
821 ubuffer += bufidx;
822 *count += bufidx;
823 bufidx = 0;
824 }
825 if (left) {
826 error = xfs_inobt_increment(cur, 0, &tmp);
827 if (error) {
828 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
829 cur = NULL;
830 xfs_buf_relse(agbp);
831 agbp = NULL;
832 /*
833 * The agino value has already been bumped.
834 * Just try to skip up to it.
835 */
836 agino += XFS_INODES_PER_CHUNK;
837 continue;
838 }
839 }
840 }
841 if (!error) {
842 if (bufidx) {
843 if (copy_to_user(ubuffer, buffer,
844 bufidx * sizeof(*buffer)))
845 error = XFS_ERROR(EFAULT);
846 else
847 *count += bufidx;
848 }
849 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
850 }
851 kmem_free(buffer, bcount * sizeof(*buffer));
852 if (cur)
853 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
854 XFS_BTREE_NOERROR));
855 if (agbp)
856 xfs_buf_relse(agbp);
857 return error;
858 }
linux-next