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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110019#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_types.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_trans.h"
25#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110026#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_dir2.h"
28#include "xfs_dmapi.h"
29#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110031#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_dir2_sf.h"
Nathan Scotta844f452005-11-02 14:38:42 +110034#include "xfs_attr_sf.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_dinode.h"
36#include "xfs_inode.h"
37#include "xfs_ialloc.h"
38#include "xfs_itable.h"
39#include "xfs_error.h"
Nathan Scotta844f452005-11-02 14:38:42 +110040#include "xfs_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Vlad Apostolov6f1f2162006-09-28 11:06:15 +100042int
43xfs_internal_inum(
44 xfs_mount_t *mp,
45 xfs_ino_t ino)
46{
47 return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
Eric Sandeen62118702008-03-06 13:44:28 +110048 (xfs_sb_version_hasquota(&mp->m_sb) &&
Vlad Apostolov6f1f2162006-09-28 11:06:15 +100049 (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino)));
50}
51
Linus Torvalds1da177e2005-04-16 15:20:36 -070052STATIC int
53xfs_bulkstat_one_iget(
54 xfs_mount_t *mp, /* mount point for filesystem */
55 xfs_ino_t ino, /* inode number to get data for */
56 xfs_daddr_t bno, /* starting bno of inode cluster */
57 xfs_bstat_t *buf, /* return buffer */
58 int *stat) /* BULKSTAT_RV_... */
59{
Christoph Hellwig347d1c02007-08-28 13:57:51 +100060 xfs_icdinode_t *dic; /* dinode core info pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 xfs_inode_t *ip; /* incore inode pointer */
62 int error;
63
Nathan Scott745b1f472006-09-28 11:02:23 +100064 error = xfs_iget(mp, NULL, ino,
65 XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 if (error) {
67 *stat = BULKSTAT_RV_NOTHING;
68 return error;
69 }
70
71 ASSERT(ip != NULL);
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +110072 ASSERT(ip->i_imap.im_blkno != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
74 dic = &ip->i_d;
75
76 /* xfs_iget returns the following without needing
77 * further change.
78 */
79 buf->bs_nlink = dic->di_nlink;
80 buf->bs_projid = dic->di_projid;
81 buf->bs_ino = ino;
82 buf->bs_mode = dic->di_mode;
83 buf->bs_uid = dic->di_uid;
84 buf->bs_gid = dic->di_gid;
85 buf->bs_size = dic->di_size;
Christoph Hellwig8fab4512009-03-16 08:24:46 +010086 /*
87 * We are reading the atime from the Linux inode because the
88 * dinode might not be uptodate.
89 */
90 buf->bs_atime.tv_sec = VFS_I(ip)->i_atime.tv_sec;
91 buf->bs_atime.tv_nsec = VFS_I(ip)->i_atime.tv_nsec;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
93 buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
94 buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
95 buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
96 buf->bs_xflags = xfs_ip2xflags(ip);
97 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
98 buf->bs_extents = dic->di_nextents;
99 buf->bs_gen = dic->di_gen;
100 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
101 buf->bs_dmevmask = dic->di_dmevmask;
102 buf->bs_dmstate = dic->di_dmstate;
103 buf->bs_aextents = dic->di_anextents;
104
105 switch (dic->di_format) {
106 case XFS_DINODE_FMT_DEV:
107 buf->bs_rdev = ip->i_df.if_u2.if_rdev;
108 buf->bs_blksize = BLKDEV_IOSIZE;
109 buf->bs_blocks = 0;
110 break;
111 case XFS_DINODE_FMT_LOCAL:
112 case XFS_DINODE_FMT_UUID:
113 buf->bs_rdev = 0;
114 buf->bs_blksize = mp->m_sb.sb_blocksize;
115 buf->bs_blocks = 0;
116 break;
117 case XFS_DINODE_FMT_EXTENTS:
118 case XFS_DINODE_FMT_BTREE:
119 buf->bs_rdev = 0;
120 buf->bs_blksize = mp->m_sb.sb_blocksize;
121 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
122 break;
123 }
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 xfs_iput(ip, XFS_ILOCK_SHARED);
126 return error;
127}
128
David Chinner7b073392008-04-10 12:24:04 +1000129STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130xfs_bulkstat_one_dinode(
131 xfs_mount_t *mp, /* mount point for filesystem */
132 xfs_ino_t ino, /* inode number to get data for */
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100133 xfs_dinode_t *dic, /* dinode inode pointer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 xfs_bstat_t *buf) /* return buffer */
135{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 /*
137 * The inode format changed when we moved the link count and
138 * made it 32 bits long. If this is an old format inode,
139 * convert it in memory to look like a new one. If it gets
140 * flushed to disk we will convert back before flushing or
141 * logging it. We zero out the new projid field and the old link
142 * count field. We'll handle clearing the pad field (the remains
143 * of the old uuid field) when we actually convert the inode to
144 * the new format. We don't change the version number so that we
145 * can distinguish this from a real new format inode.
146 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +1100147 if (dic->di_version == 1) {
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000148 buf->bs_nlink = be16_to_cpu(dic->di_onlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 buf->bs_projid = 0;
150 } else {
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000151 buf->bs_nlink = be32_to_cpu(dic->di_nlink);
152 buf->bs_projid = be16_to_cpu(dic->di_projid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 }
154
155 buf->bs_ino = ino;
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000156 buf->bs_mode = be16_to_cpu(dic->di_mode);
157 buf->bs_uid = be32_to_cpu(dic->di_uid);
158 buf->bs_gid = be32_to_cpu(dic->di_gid);
159 buf->bs_size = be64_to_cpu(dic->di_size);
160 buf->bs_atime.tv_sec = be32_to_cpu(dic->di_atime.t_sec);
161 buf->bs_atime.tv_nsec = be32_to_cpu(dic->di_atime.t_nsec);
162 buf->bs_mtime.tv_sec = be32_to_cpu(dic->di_mtime.t_sec);
163 buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec);
164 buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec);
165 buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec);
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100166 buf->bs_xflags = xfs_dic2xflags(dic);
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000167 buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog;
168 buf->bs_extents = be32_to_cpu(dic->di_nextents);
169 buf->bs_gen = be32_to_cpu(dic->di_gen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000171 buf->bs_dmevmask = be32_to_cpu(dic->di_dmevmask);
172 buf->bs_dmstate = be16_to_cpu(dic->di_dmstate);
173 buf->bs_aextents = be16_to_cpu(dic->di_anextents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000175 switch (dic->di_format) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 case XFS_DINODE_FMT_DEV:
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100177 buf->bs_rdev = xfs_dinode_get_rdev(dic);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 buf->bs_blksize = BLKDEV_IOSIZE;
179 buf->bs_blocks = 0;
180 break;
181 case XFS_DINODE_FMT_LOCAL:
182 case XFS_DINODE_FMT_UUID:
183 buf->bs_rdev = 0;
184 buf->bs_blksize = mp->m_sb.sb_blocksize;
185 buf->bs_blocks = 0;
186 break;
187 case XFS_DINODE_FMT_EXTENTS:
188 case XFS_DINODE_FMT_BTREE:
189 buf->bs_rdev = 0;
190 buf->bs_blksize = mp->m_sb.sb_blocksize;
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000191 buf->bs_blocks = be64_to_cpu(dic->di_nblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 break;
193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194}
195
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600196/* Return 0 on success or positive error */
Michal Marekfaa63e92007-07-11 11:10:19 +1000197STATIC int
198xfs_bulkstat_one_fmt(
199 void __user *ubuffer,
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600200 int ubsize,
201 int *ubused,
Michal Marekfaa63e92007-07-11 11:10:19 +1000202 const xfs_bstat_t *buffer)
203{
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600204 if (ubsize < sizeof(*buffer))
205 return XFS_ERROR(ENOMEM);
Michal Marekfaa63e92007-07-11 11:10:19 +1000206 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600207 return XFS_ERROR(EFAULT);
208 if (ubused)
209 *ubused = sizeof(*buffer);
210 return 0;
Michal Marekfaa63e92007-07-11 11:10:19 +1000211}
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213/*
214 * Return stat information for one inode.
215 * Return 0 if ok, else errno.
216 */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600217int /* error status */
218xfs_bulkstat_one_int(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 xfs_mount_t *mp, /* mount point for filesystem */
220 xfs_ino_t ino, /* inode number to get data for */
221 void __user *buffer, /* buffer to place output in */
222 int ubsize, /* size of buffer */
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600223 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 xfs_daddr_t bno, /* starting bno of inode cluster */
225 int *ubused, /* bytes used by me */
226 void *dibuff, /* on-disk inode buffer */
227 int *stat) /* BULKSTAT_RV_... */
228{
229 xfs_bstat_t *buf; /* return buffer */
230 int error = 0; /* error value */
231 xfs_dinode_t *dip; /* dinode inode pointer */
232
233 dip = (xfs_dinode_t *)dibuff;
Vlad Apostolov6f1f2162006-09-28 11:06:15 +1000234 *stat = BULKSTAT_RV_NOTHING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Vlad Apostolov6f1f2162006-09-28 11:06:15 +1000236 if (!buffer || xfs_internal_inum(mp, ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 return XFS_ERROR(EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239 buf = kmem_alloc(sizeof(*buf), KM_SLEEP);
240
241 if (dip == NULL) {
242 /* We're not being passed a pointer to a dinode. This happens
243 * if BULKSTAT_FG_IGET is selected. Do the iget.
244 */
245 error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat);
246 if (error)
247 goto out_free;
248 } else {
249 xfs_bulkstat_one_dinode(mp, ino, dip, buf);
250 }
251
sandeen@sandeen.net65fbaf22008-11-25 21:20:12 -0600252 error = formatter(buffer, ubsize, ubused, buf);
253 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 *stat = BULKSTAT_RV_DIDONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 out_free:
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000259 kmem_free(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 return error;
261}
262
sandeen@sandeen.net2ee4fa52008-11-25 21:20:11 -0600263int
264xfs_bulkstat_one(
265 xfs_mount_t *mp, /* mount point for filesystem */
266 xfs_ino_t ino, /* inode number to get data for */
267 void __user *buffer, /* buffer to place output in */
268 int ubsize, /* size of buffer */
269 void *private_data, /* my private data */
270 xfs_daddr_t bno, /* starting bno of inode cluster */
271 int *ubused, /* bytes used by me */
272 void *dibuff, /* on-disk inode buffer */
273 int *stat) /* BULKSTAT_RV_... */
274{
275 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
276 xfs_bulkstat_one_fmt, bno,
277 ubused, dibuff, stat);
278}
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280/*
Nathan Scott8b56f082006-09-28 11:01:46 +1000281 * Test to see whether we can use the ondisk inode directly, based
282 * on the given bulkstat flags, filling in dipp accordingly.
283 * Returns zero if the inode is dodgey.
284 */
285STATIC int
286xfs_bulkstat_use_dinode(
287 xfs_mount_t *mp,
288 int flags,
289 xfs_buf_t *bp,
290 int clustidx,
291 xfs_dinode_t **dipp)
292{
293 xfs_dinode_t *dip;
294 unsigned int aformat;
295
296 *dipp = NULL;
297 if (!bp || (flags & BULKSTAT_FG_IGET))
298 return 1;
299 dip = (xfs_dinode_t *)
300 xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog);
Vlad Apostolov859d7182007-10-11 17:44:18 +1000301 /*
Vlad Apostolovc319b582007-11-23 16:27:51 +1100302 * Check the buffer containing the on-disk inode for di_mode == 0.
Vlad Apostolov859d7182007-10-11 17:44:18 +1000303 * This is to prevent xfs_bulkstat from picking up just reclaimed
304 * inodes that have their in-core state initialized but not flushed
305 * to disk yet. This is a temporary hack that would require a proper
306 * fix in the future.
307 */
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100308 if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
309 !XFS_DINODE_GOOD_VERSION(dip->di_version) ||
310 !dip->di_mode)
Nathan Scott8b56f082006-09-28 11:01:46 +1000311 return 0;
312 if (flags & BULKSTAT_FG_QUICK) {
313 *dipp = dip;
314 return 1;
315 }
316 /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100317 aformat = dip->di_aformat;
Christoph Hellwig45ba5982007-12-07 14:07:20 +1100318 if ((XFS_DFORK_Q(dip) == 0) ||
Nathan Scott8b56f082006-09-28 11:01:46 +1000319 (aformat == XFS_DINODE_FMT_LOCAL) ||
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100320 (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_anextents)) {
Nathan Scott8b56f082006-09-28 11:01:46 +1000321 *dipp = dip;
322 return 1;
323 }
324 return 1;
325}
326
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100327#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
328
Nathan Scott8b56f082006-09-28 11:01:46 +1000329/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 * Return stat information in bulk (by-inode) for the filesystem.
331 */
332int /* error status */
333xfs_bulkstat(
334 xfs_mount_t *mp, /* mount point for filesystem */
335 xfs_ino_t *lastinop, /* last inode returned */
336 int *ubcountp, /* size of buffer/count returned */
337 bulkstat_one_pf formatter, /* func that'd fill a single buf */
338 void *private_data,/* private data for formatter */
339 size_t statstruct_size, /* sizeof struct filling */
340 char __user *ubuffer, /* buffer with inode stats */
341 int flags, /* defined in xfs_itable.h */
Nathan Scottc41564b2006-03-29 08:55:14 +1000342 int *done) /* 1 if there are more stats to get */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343{
344 xfs_agblock_t agbno=0;/* allocation group block number */
345 xfs_buf_t *agbp; /* agi header buffer */
346 xfs_agi_t *agi; /* agi header data */
347 xfs_agino_t agino; /* inode # in allocation group */
348 xfs_agnumber_t agno; /* allocation group number */
349 xfs_daddr_t bno; /* inode cluster start daddr */
350 int chunkidx; /* current index into inode chunk */
351 int clustidx; /* current index into inode cluster */
352 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
353 int end_of_ag; /* set if we've seen the ag end */
354 int error; /* error code */
355 int fmterror;/* bulkstat formatter result */
356 __int32_t gcnt; /* current btree rec's count */
357 xfs_inofree_t gfree; /* current btree rec's free mask */
358 xfs_agino_t gino; /* current btree rec's start inode */
359 int i; /* loop index */
360 int icount; /* count of inodes good in irbuf */
Nathan Scott215101c2006-09-28 11:04:43 +1000361 size_t irbsize; /* size of irec buffer in bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 xfs_ino_t ino; /* inode number (filesystem) */
Nathan Scott262750932006-09-28 11:02:03 +1000363 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 */
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100366 xfs_ino_t lastino; /* last inode number returned */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 int nbcluster; /* # of blocks in a cluster */
368 int nicluster; /* # of inodes in a cluster */
369 int nimask; /* mask for inode clusters */
370 int nirbuf; /* size of irbuf */
371 int rval; /* return value error code */
372 int tmp; /* result value from btree calls */
373 int ubcount; /* size of user's buffer */
374 int ubleft; /* bytes left in user's buffer */
375 char __user *ubufp; /* pointer into user's buffer */
376 int ubelem; /* spaces used in user's buffer */
377 int ubused; /* bytes used by formatter */
378 xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */
379 xfs_dinode_t *dip; /* ptr into bp for specific inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 /*
382 * Get the last inode value, see if there's nothing to do.
383 */
384 ino = (xfs_ino_t)*lastinop;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100385 lastino = ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 dip = NULL;
387 agno = XFS_INO_TO_AGNO(mp, ino);
388 agino = XFS_INO_TO_AGINO(mp, ino);
389 if (agno >= mp->m_sb.sb_agcount ||
390 ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
391 *done = 1;
392 *ubcountp = 0;
393 return 0;
394 }
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100395 if (!ubcountp || *ubcountp <= 0) {
396 return EINVAL;
397 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 ubcount = *ubcountp; /* statstruct's */
399 ubleft = ubcount * statstruct_size; /* bytes */
400 *ubcountp = ubelem = 0;
401 *done = 0;
402 fmterror = 0;
403 ubufp = ubuffer;
404 nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ?
405 mp->m_sb.sb_inopblock :
406 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
407 nimask = ~(nicluster - 1);
408 nbcluster = nicluster >> mp->m_sb.sb_inopblog;
Tim Shimmine6a4b372007-11-23 16:30:42 +1100409 irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4,
Nathan Scott77e46352006-09-28 11:03:27 +1000410 KM_SLEEP | KM_MAYFAIL | KM_LARGE);
Nathan Scottbb3c7d22006-09-28 11:02:09 +1000411 nirbuf = irbsize / sizeof(*irbuf);
412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 /*
414 * Loop over the allocation groups, starting from the last
415 * inode returned; 0 means start of the allocation group.
416 */
417 rval = 0;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100418 while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
419 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 bp = NULL;
421 down_read(&mp->m_peraglock);
422 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
423 up_read(&mp->m_peraglock);
424 if (error) {
425 /*
426 * Skip this allocation group and go to the next one.
427 */
428 agno++;
429 agino = 0;
430 continue;
431 }
432 agi = XFS_BUF_TO_AGI(agbp);
433 /*
434 * Allocate and initialize a btree cursor for ialloc btree.
435 */
Christoph Hellwig561f7d12008-10-30 16:53:59 +1100436 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 irbp = irbuf;
438 irbufend = irbuf + nirbuf;
439 end_of_ag = 0;
440 /*
441 * If we're returning in the middle of an allocation group,
442 * we need to get the remainder of the chunk we're in.
443 */
444 if (agino > 0) {
445 /*
446 * Lookup the inode chunk that this inode lives in.
447 */
448 error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp);
449 if (!error && /* no I/O error */
450 tmp && /* lookup succeeded */
451 /* got the record, should always work */
452 !(error = xfs_inobt_get_rec(cur, &gino, &gcnt,
453 &gfree, &i)) &&
454 i == 1 &&
455 /* this is the right chunk */
456 agino < gino + XFS_INODES_PER_CHUNK &&
457 /* lastino was not last in chunk */
458 (chunkidx = agino - gino + 1) <
459 XFS_INODES_PER_CHUNK &&
460 /* there are some left allocated */
Eric Sandeen9d87c312009-01-14 23:22:07 -0600461 xfs_inobt_maskn(chunkidx,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) {
463 /*
464 * Grab the chunk record. Mark all the
465 * uninteresting inodes (because they're
466 * before our start point) free.
467 */
468 for (i = 0; i < chunkidx; i++) {
469 if (XFS_INOBT_MASK(i) & ~gfree)
470 gcnt++;
471 }
Eric Sandeen9d87c312009-01-14 23:22:07 -0600472 gfree |= xfs_inobt_maskn(0, chunkidx);
Nathan Scott262750932006-09-28 11:02:03 +1000473 irbp->ir_startino = gino;
474 irbp->ir_freecount = gcnt;
475 irbp->ir_free = gfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 irbp++;
477 agino = gino + XFS_INODES_PER_CHUNK;
478 icount = XFS_INODES_PER_CHUNK - gcnt;
479 } else {
480 /*
481 * If any of those tests failed, bump the
482 * inode number (just in case).
483 */
484 agino++;
485 icount = 0;
486 }
487 /*
488 * In any case, increment to the next record.
489 */
490 if (!error)
Christoph Hellwig637aa502008-10-30 16:55:45 +1100491 error = xfs_btree_increment(cur, 0, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 } else {
493 /*
494 * Start of ag. Lookup the first inode chunk.
495 */
496 error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp);
497 icount = 0;
498 }
499 /*
500 * Loop through inode btree records in this ag,
501 * until we run out of inodes or space in the buffer.
502 */
503 while (irbp < irbufend && icount < ubcount) {
504 /*
505 * Loop as long as we're unable to read the
506 * inode btree.
507 */
508 while (error) {
509 agino += XFS_INODES_PER_CHUNK;
510 if (XFS_AGINO_TO_AGBNO(mp, agino) >=
Christoph Hellwig16259e72005-11-02 15:11:25 +1100511 be32_to_cpu(agi->agi_length))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 break;
513 error = xfs_inobt_lookup_ge(cur, agino, 0, 0,
514 &tmp);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100515 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 }
517 /*
518 * If ran off the end of the ag either with an error,
519 * or the normal way, set end and stop collecting.
520 */
521 if (error ||
522 (error = xfs_inobt_get_rec(cur, &gino, &gcnt,
523 &gfree, &i)) ||
524 i == 0) {
525 end_of_ag = 1;
526 break;
527 }
528 /*
529 * If this chunk has any allocated inodes, save it.
Nathan Scott262750932006-09-28 11:02:03 +1000530 * Also start read-ahead now for this chunk.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 */
532 if (gcnt < XFS_INODES_PER_CHUNK) {
Nathan Scott262750932006-09-28 11:02:03 +1000533 /*
534 * Loop over all clusters in the next chunk.
535 * Do a readahead if there are any allocated
536 * inodes in that cluster.
537 */
538 for (agbno = XFS_AGINO_TO_AGBNO(mp, gino),
539 chunkidx = 0;
540 chunkidx < XFS_INODES_PER_CHUNK;
541 chunkidx += nicluster,
542 agbno += nbcluster) {
Eric Sandeen9d87c312009-01-14 23:22:07 -0600543 if (xfs_inobt_maskn(chunkidx,
Nathan Scott262750932006-09-28 11:02:03 +1000544 nicluster) & ~gfree)
545 xfs_btree_reada_bufs(mp, agno,
546 agbno, nbcluster);
547 }
548 irbp->ir_startino = gino;
549 irbp->ir_freecount = gcnt;
550 irbp->ir_free = gfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 irbp++;
552 icount += XFS_INODES_PER_CHUNK - gcnt;
553 }
554 /*
555 * Set agino to after this chunk and bump the cursor.
556 */
557 agino = gino + XFS_INODES_PER_CHUNK;
Christoph Hellwig637aa502008-10-30 16:55:45 +1100558 error = xfs_btree_increment(cur, 0, &tmp);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100559 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 }
561 /*
562 * Drop the btree buffers and the agi buffer.
563 * We can't hold any of the locks these represent
564 * when calling iget.
565 */
566 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
567 xfs_buf_relse(agbp);
568 /*
569 * Now format all the good inodes into the user's buffer.
570 */
571 irbufend = irbp;
572 for (irbp = irbuf;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100573 irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 * Now process this chunk of inodes.
576 */
Nathan Scott262750932006-09-28 11:02:03 +1000577 for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100578 XFS_BULKSTAT_UBLEFT(ubleft) &&
Nathan Scott262750932006-09-28 11:02:03 +1000579 irbp->ir_freecount < XFS_INODES_PER_CHUNK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 chunkidx++, clustidx++, agino++) {
581 ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
582 /*
583 * Recompute agbno if this is the
584 * first inode of the cluster.
585 *
586 * Careful with clustidx. There can be
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200587 * multiple clusters per chunk, a single
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 * cluster per chunk or a cluster that has
589 * inodes represented from several different
590 * chunks (if blocksize is large).
591 *
592 * Because of this, the starting clustidx is
593 * initialized to zero in this loop but must
594 * later be reset after reading in the cluster
595 * buffer.
596 */
597 if ((chunkidx & (nicluster - 1)) == 0) {
598 agbno = XFS_AGINO_TO_AGBNO(mp,
Nathan Scott262750932006-09-28 11:02:03 +1000599 irbp->ir_startino) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 ((chunkidx & nimask) >>
601 mp->m_sb.sb_inopblog);
602
Nathan Scott8b56f082006-09-28 11:01:46 +1000603 if (flags & (BULKSTAT_FG_QUICK |
604 BULKSTAT_FG_INLINE)) {
Christoph Hellwigc679eef2008-10-30 18:04:13 +1100605 int offset;
606
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 ino = XFS_AGINO_TO_INO(mp, agno,
608 agino);
609 bno = XFS_AGB_TO_DADDR(mp, agno,
610 agbno);
611
612 /*
613 * Get the inode cluster buffer
614 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (bp)
616 xfs_buf_relse(bp);
Christoph Hellwigc679eef2008-10-30 18:04:13 +1100617
618 error = xfs_inotobp(mp, NULL, ino, &dip,
619 &bp, &offset,
Christoph Hellwigb48d8d62008-11-28 14:23:41 +1100620 XFS_IGET_BULKSTAT);
Christoph Hellwigc679eef2008-10-30 18:04:13 +1100621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 if (!error)
Christoph Hellwigc679eef2008-10-30 18:04:13 +1100623 clustidx = offset / mp->m_sb.sb_inodesize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 if (XFS_TEST_ERROR(error != 0,
625 mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK,
626 XFS_RANDOM_BULKSTAT_READ_CHUNK)) {
627 bp = NULL;
Nathan Scottb12dd342006-03-17 17:26:04 +1100628 ubleft = 0;
629 rval = error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 break;
631 }
632 }
633 }
Lachlan McIlroyc2cba572007-10-12 11:12:20 +1000634 ino = XFS_AGINO_TO_INO(mp, agno, agino);
635 bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 /*
637 * Skip if this inode is free.
638 */
Lachlan McIlroyc2cba572007-10-12 11:12:20 +1000639 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
640 lastino = ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 continue;
Lachlan McIlroyc2cba572007-10-12 11:12:20 +1000642 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 /*
644 * Count used inodes as free so we can tell
645 * when the chunk is used up.
646 */
Nathan Scott262750932006-09-28 11:02:03 +1000647 irbp->ir_freecount++;
Nathan Scott8b56f082006-09-28 11:01:46 +1000648 if (!xfs_bulkstat_use_dinode(mp, flags, bp,
Lachlan McIlroyc2cba572007-10-12 11:12:20 +1000649 clustidx, &dip)) {
650 lastino = ino;
Nathan Scott8b56f082006-09-28 11:01:46 +1000651 continue;
Lachlan McIlroyc2cba572007-10-12 11:12:20 +1000652 }
Nathan Scott8b56f082006-09-28 11:01:46 +1000653 /*
654 * If we need to do an iget, cannot hold bp.
655 * Drop it, until starting the next cluster.
656 */
657 if ((flags & BULKSTAT_FG_INLINE) && !dip) {
658 if (bp)
659 xfs_buf_relse(bp);
660 bp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
662
663 /*
664 * Get the inode and fill in a single buffer.
665 * BULKSTAT_FG_QUICK uses dip to fill it in.
666 * BULKSTAT_FG_IGET uses igets.
Nathan Scott8b56f082006-09-28 11:01:46 +1000667 * BULKSTAT_FG_INLINE uses dip if we have an
668 * inline attr fork, else igets.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 * See: xfs_bulkstat_one & xfs_dm_bulkstat_one.
670 * This is also used to count inodes/blks, etc
671 * in xfs_qm_quotacheck.
672 */
673 ubused = statstruct_size;
674 error = formatter(mp, ino, ubufp,
675 ubleft, private_data,
676 bno, &ubused, dip, &fmterror);
677 if (fmterror == BULKSTAT_RV_NOTHING) {
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100678 if (error && error != ENOENT &&
679 error != EINVAL) {
Vlad Apostolove132f542006-09-28 11:04:31 +1000680 ubleft = 0;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100681 rval = error;
682 break;
683 }
684 lastino = ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 continue;
686 }
687 if (fmterror == BULKSTAT_RV_GIVEUP) {
688 ubleft = 0;
689 ASSERT(error);
690 rval = error;
691 break;
692 }
693 if (ubufp)
694 ubufp += ubused;
695 ubleft -= ubused;
696 ubelem++;
697 lastino = ino;
698 }
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100699
700 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 }
702
703 if (bp)
704 xfs_buf_relse(bp);
705
706 /*
707 * Set up for the next loop iteration.
708 */
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100709 if (XFS_BULKSTAT_UBLEFT(ubleft)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 if (end_of_ag) {
711 agno++;
712 agino = 0;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100713 } else
714 agino = XFS_INO_TO_AGINO(mp, lastino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 } else
716 break;
717 }
718 /*
719 * Done, we're either out of filesystem or space to put the data.
720 */
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000721 kmem_free(irbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 *ubcountp = ubelem;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100723 /*
724 * Found some inodes, return them now and return the error next time.
725 */
726 if (ubelem)
727 rval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 if (agno >= mp->m_sb.sb_agcount) {
729 /*
730 * If we ran out of filesystem, mark lastino as off
731 * the end of the filesystem, so the next call
732 * will return immediately.
733 */
734 *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
735 *done = 1;
736 } else
737 *lastinop = (xfs_ino_t)lastino;
738
739 return rval;
740}
741
742/*
743 * Return stat information in bulk (by-inode) for the filesystem.
744 * Special case for non-sequential one inode bulkstat.
745 */
746int /* error status */
747xfs_bulkstat_single(
748 xfs_mount_t *mp, /* mount point for filesystem */
749 xfs_ino_t *lastinop, /* inode to return */
750 char __user *buffer, /* buffer with inode stats */
Nathan Scottc41564b2006-03-29 08:55:14 +1000751 int *done) /* 1 if there are more stats to get */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752{
753 int count; /* count value for bulkstat call */
754 int error; /* return value */
755 xfs_ino_t ino; /* filesystem inode number */
756 int res; /* result from bs1 */
757
758 /*
759 * note that requesting valid inode numbers which are not allocated
760 * to inodes will most likely cause xfs_itobp to generate warning
761 * messages about bad magic numbers. This is ok. The fact that
762 * the inode isn't actually an inode is handled by the
763 * error check below. Done this way to make the usual case faster
764 * at the expense of the error case.
765 */
766
767 ino = (xfs_ino_t)*lastinop;
768 error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
769 NULL, 0, NULL, NULL, &res);
770 if (error) {
771 /*
772 * Special case way failed, do it the "long" way
773 * to see if that works.
774 */
775 (*lastinop)--;
776 count = 1;
777 if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
778 NULL, sizeof(xfs_bstat_t), buffer,
779 BULKSTAT_FG_IGET, done))
780 return error;
781 if (count == 0 || (xfs_ino_t)*lastinop != ino)
782 return error == EFSCORRUPTED ?
783 XFS_ERROR(EINVAL) : error;
784 else
785 return 0;
786 }
787 *done = 0;
788 return 0;
789}
790
Michal Marekfaa63e92007-07-11 11:10:19 +1000791int
792xfs_inumbers_fmt(
793 void __user *ubuffer, /* buffer to write to */
794 const xfs_inogrp_t *buffer, /* buffer to read from */
795 long count, /* # of elements to read */
796 long *written) /* # of bytes written */
797{
798 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
799 return -EFAULT;
800 *written = count * sizeof(*buffer);
801 return 0;
802}
803
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804/*
805 * Return inode number table for the filesystem.
806 */
807int /* error status */
808xfs_inumbers(
809 xfs_mount_t *mp, /* mount point for filesystem */
810 xfs_ino_t *lastino, /* last inode returned */
811 int *count, /* size of buffer/count returned */
Michal Marekfaa63e92007-07-11 11:10:19 +1000812 void __user *ubuffer,/* buffer with inode descriptions */
813 inumbers_fmt_pf formatter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814{
815 xfs_buf_t *agbp;
816 xfs_agino_t agino;
817 xfs_agnumber_t agno;
818 int bcount;
819 xfs_inogrp_t *buffer;
820 int bufidx;
821 xfs_btree_cur_t *cur;
822 int error;
823 __int32_t gcnt;
824 xfs_inofree_t gfree;
825 xfs_agino_t gino;
826 int i;
827 xfs_ino_t ino;
828 int left;
829 int tmp;
830
831 ino = (xfs_ino_t)*lastino;
832 agno = XFS_INO_TO_AGNO(mp, ino);
833 agino = XFS_INO_TO_AGINO(mp, ino);
834 left = *count;
835 *count = 0;
Tim Shimmine6a4b372007-11-23 16:30:42 +1100836 bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
838 error = bufidx = 0;
839 cur = NULL;
840 agbp = NULL;
841 while (left > 0 && agno < mp->m_sb.sb_agcount) {
842 if (agbp == NULL) {
843 down_read(&mp->m_peraglock);
844 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
845 up_read(&mp->m_peraglock);
846 if (error) {
847 /*
848 * If we can't read the AGI of this ag,
849 * then just skip to the next one.
850 */
851 ASSERT(cur == NULL);
852 agbp = NULL;
853 agno++;
854 agino = 0;
855 continue;
856 }
Christoph Hellwig561f7d12008-10-30 16:53:59 +1100857 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp);
859 if (error) {
860 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
861 cur = NULL;
862 xfs_buf_relse(agbp);
863 agbp = NULL;
864 /*
Michael Opdenacker59c51592007-05-09 08:57:56 +0200865 * Move up the last inode in the current
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 * chunk. The lookup_ge will always get
867 * us the first inode in the next chunk.
868 */
869 agino += XFS_INODES_PER_CHUNK - 1;
870 continue;
871 }
872 }
873 if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree,
874 &i)) ||
875 i == 0) {
876 xfs_buf_relse(agbp);
877 agbp = NULL;
878 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
879 cur = NULL;
880 agno++;
881 agino = 0;
882 continue;
883 }
884 agino = gino + XFS_INODES_PER_CHUNK - 1;
885 buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino);
886 buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt;
887 buffer[bufidx].xi_allocmask = ~gfree;
888 bufidx++;
889 left--;
890 if (bufidx == bcount) {
Michal Marekfaa63e92007-07-11 11:10:19 +1000891 long written;
892 if (formatter(ubuffer, buffer, bufidx, &written)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 error = XFS_ERROR(EFAULT);
894 break;
895 }
Michal Marekfaa63e92007-07-11 11:10:19 +1000896 ubuffer += written;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 *count += bufidx;
898 bufidx = 0;
899 }
900 if (left) {
Christoph Hellwig637aa502008-10-30 16:55:45 +1100901 error = xfs_btree_increment(cur, 0, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 if (error) {
903 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
904 cur = NULL;
905 xfs_buf_relse(agbp);
906 agbp = NULL;
907 /*
908 * The agino value has already been bumped.
909 * Just try to skip up to it.
910 */
911 agino += XFS_INODES_PER_CHUNK;
912 continue;
913 }
914 }
915 }
916 if (!error) {
917 if (bufidx) {
Michal Marekfaa63e92007-07-11 11:10:19 +1000918 long written;
919 if (formatter(ubuffer, buffer, bufidx, &written))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 error = XFS_ERROR(EFAULT);
921 else
922 *count += bufidx;
923 }
924 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
925 }
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000926 kmem_free(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 if (cur)
928 xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
929 XFS_BTREE_NOERROR));
930 if (agbp)
931 xfs_buf_relse(agbp);
932 return error;
933}