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Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
70a9883c | 20 | #include "xfs_shared.h" |
a4fbe6ab | 21 | #include "xfs_format.h" |
239880ef DC |
22 | #include "xfs_log_format.h" |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 | 25 | #include "xfs_sb.h" |
a844f451 | 26 | #include "xfs_ag.h" |
1da177e4 | 27 | #include "xfs_mount.h" |
1da177e4 | 28 | #include "xfs_inode.h" |
a4fbe6ab | 29 | #include "xfs_btree.h" |
1da177e4 | 30 | #include "xfs_ialloc.h" |
a4fbe6ab | 31 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
32 | #include "xfs_itable.h" |
33 | #include "xfs_error.h" | |
f2d67614 | 34 | #include "xfs_trace.h" |
33479e05 | 35 | #include "xfs_icache.h" |
a4fbe6ab | 36 | #include "xfs_dinode.h" |
1da177e4 | 37 | |
d96f8f89 | 38 | STATIC int |
6f1f2168 VA |
39 | xfs_internal_inum( |
40 | xfs_mount_t *mp, | |
41 | xfs_ino_t ino) | |
42 | { | |
43 | return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino || | |
62118709 | 44 | (xfs_sb_version_hasquota(&mp->m_sb) && |
9cad19d2 | 45 | xfs_is_quota_inode(&mp->m_sb, ino))); |
6f1f2168 VA |
46 | } |
47 | ||
7dce11db CH |
48 | /* |
49 | * Return stat information for one inode. | |
50 | * Return 0 if ok, else errno. | |
51 | */ | |
52 | int | |
53 | xfs_bulkstat_one_int( | |
54 | struct xfs_mount *mp, /* mount point for filesystem */ | |
55 | xfs_ino_t ino, /* inode to get data for */ | |
56 | void __user *buffer, /* buffer to place output in */ | |
57 | int ubsize, /* size of buffer */ | |
58 | bulkstat_one_fmt_pf formatter, /* formatter, copy to user */ | |
7dce11db CH |
59 | int *ubused, /* bytes used by me */ |
60 | int *stat) /* BULKSTAT_RV_... */ | |
1da177e4 | 61 | { |
7dce11db CH |
62 | struct xfs_icdinode *dic; /* dinode core info pointer */ |
63 | struct xfs_inode *ip; /* incore inode pointer */ | |
7dce11db CH |
64 | struct xfs_bstat *buf; /* return buffer */ |
65 | int error = 0; /* error value */ | |
66 | ||
67 | *stat = BULKSTAT_RV_NOTHING; | |
68 | ||
69 | if (!buffer || xfs_internal_inum(mp, ino)) | |
2451337d | 70 | return -EINVAL; |
7dce11db CH |
71 | |
72 | buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL); | |
73 | if (!buf) | |
2451337d | 74 | return -ENOMEM; |
1da177e4 | 75 | |
745b1f47 | 76 | error = xfs_iget(mp, NULL, ino, |
5132ba8f DC |
77 | (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED), |
78 | XFS_ILOCK_SHARED, &ip); | |
8fe65776 | 79 | if (error) |
7dce11db | 80 | goto out_free; |
1da177e4 LT |
81 | |
82 | ASSERT(ip != NULL); | |
92bfc6e7 | 83 | ASSERT(ip->i_imap.im_blkno != 0); |
1da177e4 LT |
84 | |
85 | dic = &ip->i_d; | |
86 | ||
87 | /* xfs_iget returns the following without needing | |
88 | * further change. | |
89 | */ | |
90 | buf->bs_nlink = dic->di_nlink; | |
6743099c AM |
91 | buf->bs_projid_lo = dic->di_projid_lo; |
92 | buf->bs_projid_hi = dic->di_projid_hi; | |
1da177e4 LT |
93 | buf->bs_ino = ino; |
94 | buf->bs_mode = dic->di_mode; | |
95 | buf->bs_uid = dic->di_uid; | |
96 | buf->bs_gid = dic->di_gid; | |
97 | buf->bs_size = dic->di_size; | |
8a9c9980 CH |
98 | buf->bs_atime.tv_sec = dic->di_atime.t_sec; |
99 | buf->bs_atime.tv_nsec = dic->di_atime.t_nsec; | |
100 | buf->bs_mtime.tv_sec = dic->di_mtime.t_sec; | |
101 | buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec; | |
102 | buf->bs_ctime.tv_sec = dic->di_ctime.t_sec; | |
103 | buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec; | |
1da177e4 LT |
104 | buf->bs_xflags = xfs_ip2xflags(ip); |
105 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
106 | buf->bs_extents = dic->di_nextents; | |
107 | buf->bs_gen = dic->di_gen; | |
108 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
109 | buf->bs_dmevmask = dic->di_dmevmask; | |
110 | buf->bs_dmstate = dic->di_dmstate; | |
111 | buf->bs_aextents = dic->di_anextents; | |
07000ee6 | 112 | buf->bs_forkoff = XFS_IFORK_BOFF(ip); |
1da177e4 LT |
113 | |
114 | switch (dic->di_format) { | |
115 | case XFS_DINODE_FMT_DEV: | |
116 | buf->bs_rdev = ip->i_df.if_u2.if_rdev; | |
117 | buf->bs_blksize = BLKDEV_IOSIZE; | |
118 | buf->bs_blocks = 0; | |
119 | break; | |
120 | case XFS_DINODE_FMT_LOCAL: | |
121 | case XFS_DINODE_FMT_UUID: | |
122 | buf->bs_rdev = 0; | |
123 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
124 | buf->bs_blocks = 0; | |
125 | break; | |
126 | case XFS_DINODE_FMT_EXTENTS: | |
127 | case XFS_DINODE_FMT_BTREE: | |
128 | buf->bs_rdev = 0; | |
129 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
130 | buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; | |
131 | break; | |
132 | } | |
f2d67614 CH |
133 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
134 | IRELE(ip); | |
1da177e4 | 135 | |
7dce11db | 136 | error = formatter(buffer, ubsize, ubused, buf); |
7dce11db CH |
137 | if (!error) |
138 | *stat = BULKSTAT_RV_DIDONE; | |
1da177e4 | 139 | |
7dce11db CH |
140 | out_free: |
141 | kmem_free(buf); | |
142 | return error; | |
1da177e4 LT |
143 | } |
144 | ||
65fbaf24 | 145 | /* Return 0 on success or positive error */ |
faa63e95 MM |
146 | STATIC int |
147 | xfs_bulkstat_one_fmt( | |
148 | void __user *ubuffer, | |
65fbaf24 | 149 | int ubsize, |
150 | int *ubused, | |
faa63e95 MM |
151 | const xfs_bstat_t *buffer) |
152 | { | |
65fbaf24 | 153 | if (ubsize < sizeof(*buffer)) |
2451337d | 154 | return -ENOMEM; |
faa63e95 | 155 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
2451337d | 156 | return -EFAULT; |
65fbaf24 | 157 | if (ubused) |
158 | *ubused = sizeof(*buffer); | |
159 | return 0; | |
faa63e95 MM |
160 | } |
161 | ||
2ee4fa5c | 162 | int |
163 | xfs_bulkstat_one( | |
164 | xfs_mount_t *mp, /* mount point for filesystem */ | |
165 | xfs_ino_t ino, /* inode number to get data for */ | |
166 | void __user *buffer, /* buffer to place output in */ | |
167 | int ubsize, /* size of buffer */ | |
2ee4fa5c | 168 | int *ubused, /* bytes used by me */ |
2ee4fa5c | 169 | int *stat) /* BULKSTAT_RV_... */ |
170 | { | |
171 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, | |
7b6259e7 | 172 | xfs_bulkstat_one_fmt, ubused, stat); |
8b56f083 NS |
173 | } |
174 | ||
4b8fdfec JL |
175 | /* |
176 | * Loop over all clusters in a chunk for a given incore inode allocation btree | |
177 | * record. Do a readahead if there are any allocated inodes in that cluster. | |
178 | */ | |
179 | STATIC void | |
180 | xfs_bulkstat_ichunk_ra( | |
181 | struct xfs_mount *mp, | |
182 | xfs_agnumber_t agno, | |
183 | struct xfs_inobt_rec_incore *irec) | |
184 | { | |
185 | xfs_agblock_t agbno; | |
186 | struct blk_plug plug; | |
187 | int blks_per_cluster; | |
188 | int inodes_per_cluster; | |
189 | int i; /* inode chunk index */ | |
190 | ||
191 | agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino); | |
192 | blks_per_cluster = xfs_icluster_size_fsb(mp); | |
193 | inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog; | |
194 | ||
195 | blk_start_plug(&plug); | |
196 | for (i = 0; i < XFS_INODES_PER_CHUNK; | |
197 | i += inodes_per_cluster, agbno += blks_per_cluster) { | |
198 | if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) { | |
199 | xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster, | |
200 | &xfs_inode_buf_ops); | |
201 | } | |
202 | } | |
203 | blk_finish_plug(&plug); | |
204 | } | |
205 | ||
f3d1e587 JL |
206 | /* |
207 | * Lookup the inode chunk that the given inode lives in and then get the record | |
208 | * if we found the chunk. If the inode was not the last in the chunk and there | |
209 | * are some left allocated, update the data for the pointed-to record as well as | |
210 | * return the count of grabbed inodes. | |
211 | */ | |
212 | STATIC int | |
213 | xfs_bulkstat_grab_ichunk( | |
214 | struct xfs_btree_cur *cur, /* btree cursor */ | |
215 | xfs_agino_t agino, /* starting inode of chunk */ | |
216 | int *icount,/* return # of inodes grabbed */ | |
217 | struct xfs_inobt_rec_incore *irec) /* btree record */ | |
218 | { | |
219 | int idx; /* index into inode chunk */ | |
220 | int stat; | |
221 | int error = 0; | |
222 | ||
223 | /* Lookup the inode chunk that this inode lives in */ | |
224 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat); | |
225 | if (error) | |
226 | return error; | |
227 | if (!stat) { | |
228 | *icount = 0; | |
229 | return error; | |
230 | } | |
231 | ||
232 | /* Get the record, should always work */ | |
233 | error = xfs_inobt_get_rec(cur, irec, &stat); | |
234 | if (error) | |
235 | return error; | |
236 | XFS_WANT_CORRUPTED_RETURN(stat == 1); | |
237 | ||
238 | /* Check if the record contains the inode in request */ | |
239 | if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) | |
240 | return -EINVAL; | |
241 | ||
242 | idx = agino - irec->ir_startino + 1; | |
243 | if (idx < XFS_INODES_PER_CHUNK && | |
244 | (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) { | |
245 | int i; | |
246 | ||
247 | /* We got a right chunk with some left inodes allocated at it. | |
248 | * Grab the chunk record. Mark all the uninteresting inodes | |
249 | * free -- because they're before our start point. | |
250 | */ | |
251 | for (i = 0; i < idx; i++) { | |
252 | if (XFS_INOBT_MASK(i) & ~irec->ir_free) | |
253 | irec->ir_freecount++; | |
254 | } | |
255 | ||
256 | irec->ir_free |= xfs_inobt_maskn(0, idx); | |
257 | *icount = XFS_INODES_PER_CHUNK - irec->ir_freecount; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
cd57e594 LM |
263 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
264 | ||
1e773c49 JL |
265 | /* |
266 | * Process inodes in chunk with a pointer to a formatter function | |
267 | * that will iget the inode and fill in the appropriate structure. | |
268 | */ | |
269 | int | |
270 | xfs_bulkstat_ag_ichunk( | |
271 | struct xfs_mount *mp, | |
272 | xfs_agnumber_t agno, | |
273 | struct xfs_inobt_rec_incore *irbp, | |
274 | bulkstat_one_pf formatter, | |
275 | size_t statstruct_size, | |
276 | struct xfs_bulkstat_agichunk *acp) | |
277 | { | |
278 | xfs_ino_t lastino = acp->ac_lastino; | |
279 | char __user **ubufp = acp->ac_ubuffer; | |
280 | int ubleft = acp->ac_ubleft; | |
281 | int ubelem = acp->ac_ubelem; | |
282 | int chunkidx, clustidx; | |
283 | int error = 0; | |
284 | xfs_agino_t agino; | |
285 | ||
286 | for (agino = irbp->ir_startino, chunkidx = clustidx = 0; | |
287 | XFS_BULKSTAT_UBLEFT(ubleft) && | |
288 | irbp->ir_freecount < XFS_INODES_PER_CHUNK; | |
289 | chunkidx++, clustidx++, agino++) { | |
290 | int fmterror; /* bulkstat formatter result */ | |
291 | int ubused; | |
292 | xfs_ino_t ino = XFS_AGINO_TO_INO(mp, agno, agino); | |
293 | ||
294 | ASSERT(chunkidx < XFS_INODES_PER_CHUNK); | |
295 | ||
296 | /* Skip if this inode is free */ | |
297 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) { | |
298 | lastino = ino; | |
299 | continue; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Count used inodes as free so we can tell when the | |
304 | * chunk is used up. | |
305 | */ | |
306 | irbp->ir_freecount++; | |
307 | ||
308 | /* Get the inode and fill in a single buffer */ | |
309 | ubused = statstruct_size; | |
310 | error = formatter(mp, ino, *ubufp, ubleft, &ubused, &fmterror); | |
311 | if (fmterror == BULKSTAT_RV_NOTHING) { | |
312 | if (error && error != -ENOENT && error != -EINVAL) { | |
313 | ubleft = 0; | |
314 | break; | |
315 | } | |
316 | lastino = ino; | |
317 | continue; | |
318 | } | |
319 | if (fmterror == BULKSTAT_RV_GIVEUP) { | |
320 | ubleft = 0; | |
321 | ASSERT(error); | |
322 | break; | |
323 | } | |
324 | if (*ubufp) | |
325 | *ubufp += ubused; | |
326 | ubleft -= ubused; | |
327 | ubelem++; | |
328 | lastino = ino; | |
329 | } | |
330 | ||
331 | acp->ac_lastino = lastino; | |
332 | acp->ac_ubleft = ubleft; | |
333 | acp->ac_ubelem = ubelem; | |
334 | ||
335 | return error; | |
336 | } | |
337 | ||
1da177e4 LT |
338 | /* |
339 | * Return stat information in bulk (by-inode) for the filesystem. | |
340 | */ | |
341 | int /* error status */ | |
342 | xfs_bulkstat( | |
343 | xfs_mount_t *mp, /* mount point for filesystem */ | |
344 | xfs_ino_t *lastinop, /* last inode returned */ | |
345 | int *ubcountp, /* size of buffer/count returned */ | |
346 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
1da177e4 LT |
347 | size_t statstruct_size, /* sizeof struct filling */ |
348 | char __user *ubuffer, /* buffer with inode stats */ | |
c41564b5 | 349 | int *done) /* 1 if there are more stats to get */ |
1da177e4 | 350 | { |
1da177e4 LT |
351 | xfs_buf_t *agbp; /* agi header buffer */ |
352 | xfs_agi_t *agi; /* agi header data */ | |
353 | xfs_agino_t agino; /* inode # in allocation group */ | |
354 | xfs_agnumber_t agno; /* allocation group number */ | |
1da177e4 LT |
355 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ |
356 | int end_of_ag; /* set if we've seen the ag end */ | |
357 | int error; /* error code */ | |
358 | int fmterror;/* bulkstat formatter result */ | |
1da177e4 LT |
359 | int i; /* loop index */ |
360 | int icount; /* count of inodes good in irbuf */ | |
215101c3 | 361 | size_t irbsize; /* size of irec buffer in bytes */ |
1da177e4 | 362 | xfs_ino_t ino; /* inode number (filesystem) */ |
26275093 NS |
363 | xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */ |
364 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ | |
365 | xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */ | |
cd57e594 | 366 | xfs_ino_t lastino; /* last inode number returned */ |
1da177e4 LT |
367 | int nirbuf; /* size of irbuf */ |
368 | int rval; /* return value error code */ | |
369 | int tmp; /* result value from btree calls */ | |
370 | int ubcount; /* size of user's buffer */ | |
371 | int ubleft; /* bytes left in user's buffer */ | |
372 | char __user *ubufp; /* pointer into user's buffer */ | |
373 | int ubelem; /* spaces used in user's buffer */ | |
1da177e4 LT |
374 | |
375 | /* | |
376 | * Get the last inode value, see if there's nothing to do. | |
377 | */ | |
378 | ino = (xfs_ino_t)*lastinop; | |
cd57e594 | 379 | lastino = ino; |
1da177e4 LT |
380 | agno = XFS_INO_TO_AGNO(mp, ino); |
381 | agino = XFS_INO_TO_AGINO(mp, ino); | |
382 | if (agno >= mp->m_sb.sb_agcount || | |
383 | ino != XFS_AGINO_TO_INO(mp, agno, agino)) { | |
384 | *done = 1; | |
385 | *ubcountp = 0; | |
386 | return 0; | |
387 | } | |
296dfd7f | 388 | |
1da177e4 LT |
389 | ubcount = *ubcountp; /* statstruct's */ |
390 | ubleft = ubcount * statstruct_size; /* bytes */ | |
391 | *ubcountp = ubelem = 0; | |
392 | *done = 0; | |
393 | fmterror = 0; | |
394 | ubufp = ubuffer; | |
bdfb0430 CH |
395 | irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4); |
396 | if (!irbuf) | |
2451337d | 397 | return -ENOMEM; |
bdfb0430 | 398 | |
bb3c7d29 NS |
399 | nirbuf = irbsize / sizeof(*irbuf); |
400 | ||
1da177e4 LT |
401 | /* |
402 | * Loop over the allocation groups, starting from the last | |
403 | * inode returned; 0 means start of the allocation group. | |
404 | */ | |
405 | rval = 0; | |
cd57e594 LM |
406 | while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) { |
407 | cond_resched(); | |
1da177e4 | 408 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
d4c27348 JL |
409 | if (error) |
410 | break; | |
1da177e4 LT |
411 | agi = XFS_BUF_TO_AGI(agbp); |
412 | /* | |
413 | * Allocate and initialize a btree cursor for ialloc btree. | |
414 | */ | |
57bd3dbe BF |
415 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
416 | XFS_BTNUM_INO); | |
1da177e4 LT |
417 | irbp = irbuf; |
418 | irbufend = irbuf + nirbuf; | |
419 | end_of_ag = 0; | |
f3d1e587 | 420 | icount = 0; |
1da177e4 LT |
421 | if (agino > 0) { |
422 | /* | |
f3d1e587 JL |
423 | * In the middle of an allocation group, we need to get |
424 | * the remainder of the chunk we're in. | |
1da177e4 | 425 | */ |
f3d1e587 JL |
426 | struct xfs_inobt_rec_incore r; |
427 | ||
428 | error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r); | |
429 | if (error) | |
430 | break; | |
431 | if (icount) { | |
2e287a73 CH |
432 | irbp->ir_startino = r.ir_startino; |
433 | irbp->ir_freecount = r.ir_freecount; | |
434 | irbp->ir_free = r.ir_free; | |
1da177e4 | 435 | irbp++; |
2e287a73 | 436 | agino = r.ir_startino + XFS_INODES_PER_CHUNK; |
1da177e4 | 437 | } |
f3d1e587 JL |
438 | /* Increment to the next record */ |
439 | error = xfs_btree_increment(cur, 0, &tmp); | |
1da177e4 | 440 | } else { |
f3d1e587 | 441 | /* Start of ag. Lookup the first inode chunk */ |
21875505 | 442 | error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp); |
1da177e4 | 443 | } |
d4c27348 JL |
444 | if (error) |
445 | break; | |
446 | ||
1da177e4 LT |
447 | /* |
448 | * Loop through inode btree records in this ag, | |
449 | * until we run out of inodes or space in the buffer. | |
450 | */ | |
451 | while (irbp < irbufend && icount < ubcount) { | |
d4c27348 | 452 | struct xfs_inobt_rec_incore r; |
2e287a73 CH |
453 | |
454 | error = xfs_inobt_get_rec(cur, &r, &i); | |
455 | if (error || i == 0) { | |
1da177e4 LT |
456 | end_of_ag = 1; |
457 | break; | |
458 | } | |
2e287a73 | 459 | |
1da177e4 LT |
460 | /* |
461 | * If this chunk has any allocated inodes, save it. | |
26275093 | 462 | * Also start read-ahead now for this chunk. |
1da177e4 | 463 | */ |
2e287a73 | 464 | if (r.ir_freecount < XFS_INODES_PER_CHUNK) { |
4b8fdfec | 465 | xfs_bulkstat_ichunk_ra(mp, agno, &r); |
2e287a73 CH |
466 | irbp->ir_startino = r.ir_startino; |
467 | irbp->ir_freecount = r.ir_freecount; | |
468 | irbp->ir_free = r.ir_free; | |
1da177e4 | 469 | irbp++; |
2e287a73 | 470 | icount += XFS_INODES_PER_CHUNK - r.ir_freecount; |
1da177e4 LT |
471 | } |
472 | /* | |
473 | * Set agino to after this chunk and bump the cursor. | |
474 | */ | |
2e287a73 | 475 | agino = r.ir_startino + XFS_INODES_PER_CHUNK; |
637aa50f | 476 | error = xfs_btree_increment(cur, 0, &tmp); |
cd57e594 | 477 | cond_resched(); |
1da177e4 LT |
478 | } |
479 | /* | |
480 | * Drop the btree buffers and the agi buffer. | |
481 | * We can't hold any of the locks these represent | |
482 | * when calling iget. | |
483 | */ | |
484 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
485 | xfs_buf_relse(agbp); | |
486 | /* | |
487 | * Now format all the good inodes into the user's buffer. | |
488 | */ | |
489 | irbufend = irbp; | |
490 | for (irbp = irbuf; | |
cd57e594 | 491 | irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) { |
1e773c49 JL |
492 | struct xfs_bulkstat_agichunk ac; |
493 | ||
494 | ac.ac_lastino = lastino; | |
495 | ac.ac_ubuffer = &ubuffer; | |
496 | ac.ac_ubleft = ubleft; | |
497 | ac.ac_ubelem = ubelem; | |
498 | error = xfs_bulkstat_ag_ichunk(mp, agno, irbp, | |
499 | formatter, statstruct_size, &ac); | |
500 | if (error) | |
501 | rval = error; | |
502 | ||
503 | lastino = ac.ac_lastino; | |
504 | ubleft = ac.ac_ubleft; | |
505 | ubelem = ac.ac_ubelem; | |
cd57e594 LM |
506 | |
507 | cond_resched(); | |
1da177e4 | 508 | } |
1da177e4 LT |
509 | /* |
510 | * Set up for the next loop iteration. | |
511 | */ | |
cd57e594 | 512 | if (XFS_BULKSTAT_UBLEFT(ubleft)) { |
1da177e4 LT |
513 | if (end_of_ag) { |
514 | agno++; | |
515 | agino = 0; | |
cd57e594 LM |
516 | } else |
517 | agino = XFS_INO_TO_AGINO(mp, lastino); | |
1da177e4 LT |
518 | } else |
519 | break; | |
520 | } | |
521 | /* | |
522 | * Done, we're either out of filesystem or space to put the data. | |
523 | */ | |
fdd3ccee | 524 | kmem_free(irbuf); |
1da177e4 | 525 | *ubcountp = ubelem; |
cd57e594 LM |
526 | /* |
527 | * Found some inodes, return them now and return the error next time. | |
528 | */ | |
529 | if (ubelem) | |
530 | rval = 0; | |
1da177e4 LT |
531 | if (agno >= mp->m_sb.sb_agcount) { |
532 | /* | |
533 | * If we ran out of filesystem, mark lastino as off | |
534 | * the end of the filesystem, so the next call | |
535 | * will return immediately. | |
536 | */ | |
537 | *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0); | |
538 | *done = 1; | |
539 | } else | |
540 | *lastinop = (xfs_ino_t)lastino; | |
541 | ||
542 | return rval; | |
543 | } | |
544 | ||
faa63e95 MM |
545 | int |
546 | xfs_inumbers_fmt( | |
547 | void __user *ubuffer, /* buffer to write to */ | |
549fa006 | 548 | const struct xfs_inogrp *buffer, /* buffer to read from */ |
faa63e95 MM |
549 | long count, /* # of elements to read */ |
550 | long *written) /* # of bytes written */ | |
551 | { | |
552 | if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer))) | |
553 | return -EFAULT; | |
554 | *written = count * sizeof(*buffer); | |
555 | return 0; | |
556 | } | |
557 | ||
1da177e4 LT |
558 | /* |
559 | * Return inode number table for the filesystem. | |
560 | */ | |
561 | int /* error status */ | |
562 | xfs_inumbers( | |
549fa006 JL |
563 | struct xfs_mount *mp,/* mount point for filesystem */ |
564 | xfs_ino_t *lastino,/* last inode returned */ | |
565 | int *count,/* size of buffer/count returned */ | |
566 | void __user *ubuffer,/* buffer with inode descriptions */ | |
567 | inumbers_fmt_pf formatter) | |
1da177e4 | 568 | { |
549fa006 JL |
569 | xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino); |
570 | xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino); | |
571 | struct xfs_btree_cur *cur = NULL; | |
c7cb51dc | 572 | struct xfs_buf *agbp = NULL; |
549fa006 JL |
573 | struct xfs_inogrp *buffer; |
574 | int bcount; | |
575 | int left = *count; | |
576 | int bufidx = 0; | |
577 | int error = 0; | |
578 | ||
1da177e4 | 579 | *count = 0; |
549fa006 JL |
580 | if (agno >= mp->m_sb.sb_agcount || |
581 | *lastino != XFS_AGINO_TO_INO(mp, agno, agino)) | |
582 | return error; | |
583 | ||
e6a4b37f | 584 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
1da177e4 | 585 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); |
c7cb51dc | 586 | do { |
549fa006 JL |
587 | struct xfs_inobt_rec_incore r; |
588 | int stat; | |
589 | ||
c7cb51dc | 590 | if (!agbp) { |
1da177e4 | 591 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
c7cb51dc JL |
592 | if (error) |
593 | break; | |
594 | ||
57bd3dbe BF |
595 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
596 | XFS_BTNUM_INO); | |
21875505 | 597 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE, |
549fa006 | 598 | &stat); |
c7cb51dc JL |
599 | if (error) |
600 | break; | |
601 | if (!stat) | |
602 | goto next_ag; | |
1da177e4 | 603 | } |
c7cb51dc | 604 | |
549fa006 | 605 | error = xfs_inobt_get_rec(cur, &r, &stat); |
c7cb51dc JL |
606 | if (error) |
607 | break; | |
608 | if (!stat) | |
609 | goto next_ag; | |
610 | ||
2e287a73 CH |
611 | agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1; |
612 | buffer[bufidx].xi_startino = | |
613 | XFS_AGINO_TO_INO(mp, agno, r.ir_startino); | |
614 | buffer[bufidx].xi_alloccount = | |
615 | XFS_INODES_PER_CHUNK - r.ir_freecount; | |
616 | buffer[bufidx].xi_allocmask = ~r.ir_free; | |
c7cb51dc JL |
617 | if (++bufidx == bcount) { |
618 | long written; | |
619 | ||
549fa006 JL |
620 | error = formatter(ubuffer, buffer, bufidx, &written); |
621 | if (error) | |
1da177e4 | 622 | break; |
faa63e95 | 623 | ubuffer += written; |
1da177e4 LT |
624 | *count += bufidx; |
625 | bufidx = 0; | |
626 | } | |
c7cb51dc JL |
627 | if (!--left) |
628 | break; | |
629 | ||
630 | error = xfs_btree_increment(cur, 0, &stat); | |
631 | if (error) | |
632 | break; | |
633 | if (stat) | |
634 | continue; | |
635 | ||
636 | next_ag: | |
637 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
638 | cur = NULL; | |
639 | xfs_buf_relse(agbp); | |
640 | agbp = NULL; | |
641 | agino = 0; | |
a8b1ee8b ES |
642 | agno++; |
643 | } while (agno < mp->m_sb.sb_agcount); | |
c7cb51dc | 644 | |
1da177e4 LT |
645 | if (!error) { |
646 | if (bufidx) { | |
c7cb51dc JL |
647 | long written; |
648 | ||
549fa006 JL |
649 | error = formatter(ubuffer, buffer, bufidx, &written); |
650 | if (!error) | |
1da177e4 LT |
651 | *count += bufidx; |
652 | } | |
653 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); | |
654 | } | |
c7cb51dc | 655 | |
f0e2d93c | 656 | kmem_free(buffer); |
1da177e4 LT |
657 | if (cur) |
658 | xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : | |
659 | XFS_BTREE_NOERROR)); | |
660 | if (agbp) | |
661 | xfs_buf_relse(agbp); | |
c7cb51dc | 662 | |
1da177e4 LT |
663 | return error; |
664 | } |