Commit | Line | Data |
---|---|---|
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" | |
1da177e4 | 24 | #include "xfs_mount.h" |
1da177e4 | 25 | #include "xfs_inode.h" |
a4fbe6ab | 26 | #include "xfs_btree.h" |
1da177e4 | 27 | #include "xfs_ialloc.h" |
a4fbe6ab | 28 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
29 | #include "xfs_itable.h" |
30 | #include "xfs_error.h" | |
f2d67614 | 31 | #include "xfs_trace.h" |
33479e05 | 32 | #include "xfs_icache.h" |
1da177e4 | 33 | |
d96f8f89 | 34 | STATIC int |
6f1f2168 VA |
35 | xfs_internal_inum( |
36 | xfs_mount_t *mp, | |
37 | xfs_ino_t ino) | |
38 | { | |
39 | return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino || | |
62118709 | 40 | (xfs_sb_version_hasquota(&mp->m_sb) && |
9cad19d2 | 41 | xfs_is_quota_inode(&mp->m_sb, ino))); |
6f1f2168 VA |
42 | } |
43 | ||
7dce11db CH |
44 | /* |
45 | * Return stat information for one inode. | |
46 | * Return 0 if ok, else errno. | |
47 | */ | |
48 | int | |
49 | xfs_bulkstat_one_int( | |
50 | struct xfs_mount *mp, /* mount point for filesystem */ | |
51 | xfs_ino_t ino, /* inode to get data for */ | |
52 | void __user *buffer, /* buffer to place output in */ | |
53 | int ubsize, /* size of buffer */ | |
54 | bulkstat_one_fmt_pf formatter, /* formatter, copy to user */ | |
7dce11db CH |
55 | int *ubused, /* bytes used by me */ |
56 | int *stat) /* BULKSTAT_RV_... */ | |
1da177e4 | 57 | { |
7dce11db CH |
58 | struct xfs_icdinode *dic; /* dinode core info pointer */ |
59 | struct xfs_inode *ip; /* incore inode pointer */ | |
7dce11db CH |
60 | struct xfs_bstat *buf; /* return buffer */ |
61 | int error = 0; /* error value */ | |
62 | ||
63 | *stat = BULKSTAT_RV_NOTHING; | |
64 | ||
65 | if (!buffer || xfs_internal_inum(mp, ino)) | |
2451337d | 66 | return -EINVAL; |
7dce11db CH |
67 | |
68 | buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL); | |
69 | if (!buf) | |
2451337d | 70 | return -ENOMEM; |
1da177e4 | 71 | |
745b1f47 | 72 | error = xfs_iget(mp, NULL, ino, |
5132ba8f DC |
73 | (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED), |
74 | XFS_ILOCK_SHARED, &ip); | |
8fe65776 | 75 | if (error) |
7dce11db | 76 | goto out_free; |
1da177e4 LT |
77 | |
78 | ASSERT(ip != NULL); | |
92bfc6e7 | 79 | ASSERT(ip->i_imap.im_blkno != 0); |
1da177e4 LT |
80 | |
81 | dic = &ip->i_d; | |
82 | ||
83 | /* xfs_iget returns the following without needing | |
84 | * further change. | |
85 | */ | |
86 | buf->bs_nlink = dic->di_nlink; | |
6743099c AM |
87 | buf->bs_projid_lo = dic->di_projid_lo; |
88 | buf->bs_projid_hi = dic->di_projid_hi; | |
1da177e4 LT |
89 | buf->bs_ino = ino; |
90 | buf->bs_mode = dic->di_mode; | |
91 | buf->bs_uid = dic->di_uid; | |
92 | buf->bs_gid = dic->di_gid; | |
93 | buf->bs_size = dic->di_size; | |
8a9c9980 CH |
94 | buf->bs_atime.tv_sec = dic->di_atime.t_sec; |
95 | buf->bs_atime.tv_nsec = dic->di_atime.t_nsec; | |
96 | buf->bs_mtime.tv_sec = dic->di_mtime.t_sec; | |
97 | buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec; | |
98 | buf->bs_ctime.tv_sec = dic->di_ctime.t_sec; | |
99 | buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec; | |
1da177e4 LT |
100 | buf->bs_xflags = xfs_ip2xflags(ip); |
101 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
102 | buf->bs_extents = dic->di_nextents; | |
103 | buf->bs_gen = dic->di_gen; | |
104 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
105 | buf->bs_dmevmask = dic->di_dmevmask; | |
106 | buf->bs_dmstate = dic->di_dmstate; | |
107 | buf->bs_aextents = dic->di_anextents; | |
07000ee6 | 108 | buf->bs_forkoff = XFS_IFORK_BOFF(ip); |
1da177e4 LT |
109 | |
110 | switch (dic->di_format) { | |
111 | case XFS_DINODE_FMT_DEV: | |
112 | buf->bs_rdev = ip->i_df.if_u2.if_rdev; | |
113 | buf->bs_blksize = BLKDEV_IOSIZE; | |
114 | buf->bs_blocks = 0; | |
115 | break; | |
116 | case XFS_DINODE_FMT_LOCAL: | |
117 | case XFS_DINODE_FMT_UUID: | |
118 | buf->bs_rdev = 0; | |
119 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
120 | buf->bs_blocks = 0; | |
121 | break; | |
122 | case XFS_DINODE_FMT_EXTENTS: | |
123 | case XFS_DINODE_FMT_BTREE: | |
124 | buf->bs_rdev = 0; | |
125 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
126 | buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; | |
127 | break; | |
128 | } | |
f2d67614 CH |
129 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
130 | IRELE(ip); | |
1da177e4 | 131 | |
7dce11db | 132 | error = formatter(buffer, ubsize, ubused, buf); |
7dce11db CH |
133 | if (!error) |
134 | *stat = BULKSTAT_RV_DIDONE; | |
1da177e4 | 135 | |
7dce11db CH |
136 | out_free: |
137 | kmem_free(buf); | |
138 | return error; | |
1da177e4 LT |
139 | } |
140 | ||
65fbaf24 | 141 | /* Return 0 on success or positive error */ |
faa63e95 MM |
142 | STATIC int |
143 | xfs_bulkstat_one_fmt( | |
144 | void __user *ubuffer, | |
65fbaf24 | 145 | int ubsize, |
146 | int *ubused, | |
faa63e95 MM |
147 | const xfs_bstat_t *buffer) |
148 | { | |
65fbaf24 | 149 | if (ubsize < sizeof(*buffer)) |
2451337d | 150 | return -ENOMEM; |
faa63e95 | 151 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
2451337d | 152 | return -EFAULT; |
65fbaf24 | 153 | if (ubused) |
154 | *ubused = sizeof(*buffer); | |
155 | return 0; | |
faa63e95 MM |
156 | } |
157 | ||
2ee4fa5c | 158 | int |
159 | xfs_bulkstat_one( | |
160 | xfs_mount_t *mp, /* mount point for filesystem */ | |
161 | xfs_ino_t ino, /* inode number to get data for */ | |
162 | void __user *buffer, /* buffer to place output in */ | |
163 | int ubsize, /* size of buffer */ | |
2ee4fa5c | 164 | int *ubused, /* bytes used by me */ |
2ee4fa5c | 165 | int *stat) /* BULKSTAT_RV_... */ |
166 | { | |
167 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, | |
7b6259e7 | 168 | xfs_bulkstat_one_fmt, ubused, stat); |
8b56f083 NS |
169 | } |
170 | ||
4b8fdfec JL |
171 | /* |
172 | * Loop over all clusters in a chunk for a given incore inode allocation btree | |
173 | * record. Do a readahead if there are any allocated inodes in that cluster. | |
174 | */ | |
175 | STATIC void | |
176 | xfs_bulkstat_ichunk_ra( | |
177 | struct xfs_mount *mp, | |
178 | xfs_agnumber_t agno, | |
179 | struct xfs_inobt_rec_incore *irec) | |
180 | { | |
181 | xfs_agblock_t agbno; | |
182 | struct blk_plug plug; | |
183 | int blks_per_cluster; | |
184 | int inodes_per_cluster; | |
185 | int i; /* inode chunk index */ | |
186 | ||
187 | agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino); | |
188 | blks_per_cluster = xfs_icluster_size_fsb(mp); | |
189 | inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog; | |
190 | ||
191 | blk_start_plug(&plug); | |
192 | for (i = 0; i < XFS_INODES_PER_CHUNK; | |
193 | i += inodes_per_cluster, agbno += blks_per_cluster) { | |
194 | if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) { | |
195 | xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster, | |
196 | &xfs_inode_buf_ops); | |
197 | } | |
198 | } | |
199 | blk_finish_plug(&plug); | |
200 | } | |
201 | ||
f3d1e587 JL |
202 | /* |
203 | * Lookup the inode chunk that the given inode lives in and then get the record | |
204 | * if we found the chunk. If the inode was not the last in the chunk and there | |
205 | * are some left allocated, update the data for the pointed-to record as well as | |
206 | * return the count of grabbed inodes. | |
207 | */ | |
208 | STATIC int | |
209 | xfs_bulkstat_grab_ichunk( | |
210 | struct xfs_btree_cur *cur, /* btree cursor */ | |
211 | xfs_agino_t agino, /* starting inode of chunk */ | |
212 | int *icount,/* return # of inodes grabbed */ | |
213 | struct xfs_inobt_rec_incore *irec) /* btree record */ | |
214 | { | |
215 | int idx; /* index into inode chunk */ | |
216 | int stat; | |
217 | int error = 0; | |
218 | ||
219 | /* Lookup the inode chunk that this inode lives in */ | |
220 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat); | |
221 | if (error) | |
222 | return error; | |
223 | if (!stat) { | |
224 | *icount = 0; | |
225 | return error; | |
226 | } | |
227 | ||
228 | /* Get the record, should always work */ | |
229 | error = xfs_inobt_get_rec(cur, irec, &stat); | |
230 | if (error) | |
231 | return error; | |
232 | XFS_WANT_CORRUPTED_RETURN(stat == 1); | |
233 | ||
234 | /* Check if the record contains the inode in request */ | |
febe3cbe DC |
235 | if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) { |
236 | *icount = 0; | |
237 | return 0; | |
238 | } | |
f3d1e587 JL |
239 | |
240 | idx = agino - irec->ir_startino + 1; | |
241 | if (idx < XFS_INODES_PER_CHUNK && | |
242 | (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) { | |
243 | int i; | |
244 | ||
245 | /* We got a right chunk with some left inodes allocated at it. | |
246 | * Grab the chunk record. Mark all the uninteresting inodes | |
247 | * free -- because they're before our start point. | |
248 | */ | |
249 | for (i = 0; i < idx; i++) { | |
250 | if (XFS_INOBT_MASK(i) & ~irec->ir_free) | |
251 | irec->ir_freecount++; | |
252 | } | |
253 | ||
254 | irec->ir_free |= xfs_inobt_maskn(0, idx); | |
255 | *icount = XFS_INODES_PER_CHUNK - irec->ir_freecount; | |
256 | } | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
cd57e594 LM |
261 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
262 | ||
bf4a5af2 DC |
263 | struct xfs_bulkstat_agichunk { |
264 | char __user **ac_ubuffer;/* pointer into user's buffer */ | |
265 | int ac_ubleft; /* bytes left in user's buffer */ | |
266 | int ac_ubelem; /* spaces used in user's buffer */ | |
267 | }; | |
268 | ||
1e773c49 JL |
269 | /* |
270 | * Process inodes in chunk with a pointer to a formatter function | |
271 | * that will iget the inode and fill in the appropriate structure. | |
272 | */ | |
bf4a5af2 | 273 | static int |
1e773c49 JL |
274 | xfs_bulkstat_ag_ichunk( |
275 | struct xfs_mount *mp, | |
276 | xfs_agnumber_t agno, | |
277 | struct xfs_inobt_rec_incore *irbp, | |
278 | bulkstat_one_pf formatter, | |
279 | size_t statstruct_size, | |
bf4a5af2 | 280 | struct xfs_bulkstat_agichunk *acp, |
00275899 | 281 | xfs_agino_t *last_agino) |
1e773c49 | 282 | { |
1e773c49 | 283 | char __user **ubufp = acp->ac_ubuffer; |
2b831ac6 | 284 | int chunkidx; |
1e773c49 | 285 | int error = 0; |
00275899 | 286 | xfs_agino_t agino = irbp->ir_startino; |
1e773c49 | 287 | |
2b831ac6 DC |
288 | for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK; |
289 | chunkidx++, agino++) { | |
290 | int fmterror; | |
1e773c49 | 291 | int ubused; |
00275899 DC |
292 | |
293 | /* inode won't fit in buffer, we are done */ | |
294 | if (acp->ac_ubleft < statstruct_size) | |
295 | break; | |
1e773c49 | 296 | |
1e773c49 | 297 | /* Skip if this inode is free */ |
00275899 | 298 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) |
1e773c49 | 299 | continue; |
1e773c49 | 300 | |
1e773c49 JL |
301 | /* Get the inode and fill in a single buffer */ |
302 | ubused = statstruct_size; | |
00275899 DC |
303 | error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino), |
304 | *ubufp, acp->ac_ubleft, &ubused, &fmterror); | |
305 | ||
2b831ac6 DC |
306 | if (fmterror == BULKSTAT_RV_GIVEUP || |
307 | (error && error != -ENOENT && error != -EINVAL)) { | |
308 | acp->ac_ubleft = 0; | |
1e773c49 JL |
309 | ASSERT(error); |
310 | break; | |
311 | } | |
2b831ac6 DC |
312 | |
313 | /* be careful not to leak error if at end of chunk */ | |
314 | if (fmterror == BULKSTAT_RV_NOTHING || error) { | |
2b831ac6 DC |
315 | error = 0; |
316 | continue; | |
317 | } | |
318 | ||
319 | *ubufp += ubused; | |
320 | acp->ac_ubleft -= ubused; | |
321 | acp->ac_ubelem++; | |
2b831ac6 | 322 | } |
1e773c49 | 323 | |
00275899 DC |
324 | /* |
325 | * Post-update *last_agino. At this point, agino will always point one | |
326 | * inode past the last inode we processed successfully. Hence we | |
327 | * substract that inode when setting the *last_agino cursor so that we | |
328 | * return the correct cookie to userspace. On the next bulkstat call, | |
329 | * the inode under the lastino cookie will be skipped as we have already | |
330 | * processed it here. | |
331 | */ | |
332 | *last_agino = agino - 1; | |
333 | ||
1e773c49 JL |
334 | return error; |
335 | } | |
336 | ||
1da177e4 LT |
337 | /* |
338 | * Return stat information in bulk (by-inode) for the filesystem. | |
339 | */ | |
340 | int /* error status */ | |
341 | xfs_bulkstat( | |
342 | xfs_mount_t *mp, /* mount point for filesystem */ | |
343 | xfs_ino_t *lastinop, /* last inode returned */ | |
344 | int *ubcountp, /* size of buffer/count returned */ | |
345 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
1da177e4 LT |
346 | size_t statstruct_size, /* sizeof struct filling */ |
347 | char __user *ubuffer, /* buffer with inode stats */ | |
c41564b5 | 348 | int *done) /* 1 if there are more stats to get */ |
1da177e4 | 349 | { |
1da177e4 | 350 | xfs_buf_t *agbp; /* agi header buffer */ |
1da177e4 LT |
351 | xfs_agino_t agino; /* inode # in allocation group */ |
352 | xfs_agnumber_t agno; /* allocation group number */ | |
1da177e4 | 353 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ |
215101c3 | 354 | size_t irbsize; /* size of irec buffer in bytes */ |
26275093 | 355 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ |
1da177e4 | 356 | int nirbuf; /* size of irbuf */ |
1da177e4 | 357 | int ubcount; /* size of user's buffer */ |
bf4a5af2 | 358 | struct xfs_bulkstat_agichunk ac; |
6e57c542 | 359 | int error = 0; |
1da177e4 LT |
360 | |
361 | /* | |
362 | * Get the last inode value, see if there's nothing to do. | |
363 | */ | |
00275899 DC |
364 | agno = XFS_INO_TO_AGNO(mp, *lastinop); |
365 | agino = XFS_INO_TO_AGINO(mp, *lastinop); | |
1da177e4 | 366 | if (agno >= mp->m_sb.sb_agcount || |
00275899 | 367 | *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) { |
1da177e4 LT |
368 | *done = 1; |
369 | *ubcountp = 0; | |
370 | return 0; | |
371 | } | |
296dfd7f | 372 | |
1da177e4 | 373 | ubcount = *ubcountp; /* statstruct's */ |
bf4a5af2 DC |
374 | ac.ac_ubuffer = &ubuffer; |
375 | ac.ac_ubleft = ubcount * statstruct_size; /* bytes */; | |
376 | ac.ac_ubelem = 0; | |
377 | ||
378 | *ubcountp = 0; | |
1da177e4 | 379 | *done = 0; |
bf4a5af2 | 380 | |
bdfb0430 CH |
381 | irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4); |
382 | if (!irbuf) | |
2451337d | 383 | return -ENOMEM; |
bdfb0430 | 384 | |
bb3c7d29 NS |
385 | nirbuf = irbsize / sizeof(*irbuf); |
386 | ||
1da177e4 LT |
387 | /* |
388 | * Loop over the allocation groups, starting from the last | |
389 | * inode returned; 0 means start of the allocation group. | |
390 | */ | |
6e57c542 DC |
391 | while (agno < mp->m_sb.sb_agcount) { |
392 | struct xfs_inobt_rec_incore *irbp = irbuf; | |
393 | struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf; | |
394 | bool end_of_ag = false; | |
395 | int icount = 0; | |
396 | int stat; | |
397 | ||
1da177e4 | 398 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
d4c27348 JL |
399 | if (error) |
400 | break; | |
1da177e4 LT |
401 | /* |
402 | * Allocate and initialize a btree cursor for ialloc btree. | |
403 | */ | |
57bd3dbe BF |
404 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
405 | XFS_BTNUM_INO); | |
1da177e4 LT |
406 | if (agino > 0) { |
407 | /* | |
f3d1e587 JL |
408 | * In the middle of an allocation group, we need to get |
409 | * the remainder of the chunk we're in. | |
1da177e4 | 410 | */ |
f3d1e587 JL |
411 | struct xfs_inobt_rec_incore r; |
412 | ||
413 | error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r); | |
414 | if (error) | |
a6bbce54 | 415 | goto del_cursor; |
f3d1e587 | 416 | if (icount) { |
2e287a73 CH |
417 | irbp->ir_startino = r.ir_startino; |
418 | irbp->ir_freecount = r.ir_freecount; | |
419 | irbp->ir_free = r.ir_free; | |
1da177e4 | 420 | irbp++; |
1da177e4 | 421 | } |
f3d1e587 | 422 | /* Increment to the next record */ |
afa947cb | 423 | error = xfs_btree_increment(cur, 0, &stat); |
1da177e4 | 424 | } else { |
f3d1e587 | 425 | /* Start of ag. Lookup the first inode chunk */ |
afa947cb | 426 | error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat); |
1da177e4 | 427 | } |
afa947cb | 428 | if (error || stat == 0) { |
6e57c542 | 429 | end_of_ag = true; |
a6bbce54 | 430 | goto del_cursor; |
afa947cb | 431 | } |
d4c27348 | 432 | |
1da177e4 LT |
433 | /* |
434 | * Loop through inode btree records in this ag, | |
435 | * until we run out of inodes or space in the buffer. | |
436 | */ | |
437 | while (irbp < irbufend && icount < ubcount) { | |
d4c27348 | 438 | struct xfs_inobt_rec_incore r; |
2e287a73 | 439 | |
afa947cb DC |
440 | error = xfs_inobt_get_rec(cur, &r, &stat); |
441 | if (error || stat == 0) { | |
6e57c542 | 442 | end_of_ag = true; |
a6bbce54 | 443 | goto del_cursor; |
1da177e4 | 444 | } |
2e287a73 | 445 | |
1da177e4 LT |
446 | /* |
447 | * If this chunk has any allocated inodes, save it. | |
26275093 | 448 | * Also start read-ahead now for this chunk. |
1da177e4 | 449 | */ |
2e287a73 | 450 | if (r.ir_freecount < XFS_INODES_PER_CHUNK) { |
4b8fdfec | 451 | xfs_bulkstat_ichunk_ra(mp, agno, &r); |
2e287a73 CH |
452 | irbp->ir_startino = r.ir_startino; |
453 | irbp->ir_freecount = r.ir_freecount; | |
454 | irbp->ir_free = r.ir_free; | |
1da177e4 | 455 | irbp++; |
2e287a73 | 456 | icount += XFS_INODES_PER_CHUNK - r.ir_freecount; |
1da177e4 | 457 | } |
afa947cb DC |
458 | error = xfs_btree_increment(cur, 0, &stat); |
459 | if (error || stat == 0) { | |
6e57c542 | 460 | end_of_ag = true; |
7a19dee1 JK |
461 | goto del_cursor; |
462 | } | |
cd57e594 | 463 | cond_resched(); |
1da177e4 | 464 | } |
a6bbce54 | 465 | |
1da177e4 | 466 | /* |
a6bbce54 DC |
467 | * Drop the btree buffers and the agi buffer as we can't hold any |
468 | * of the locks these represent when calling iget. If there is a | |
469 | * pending error, then we are done. | |
1da177e4 | 470 | */ |
a6bbce54 | 471 | del_cursor: |
1da177e4 LT |
472 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
473 | xfs_buf_relse(agbp); | |
a6bbce54 DC |
474 | if (error) |
475 | break; | |
1da177e4 | 476 | /* |
00275899 DC |
477 | * Now format all the good inodes into the user's buffer. The |
478 | * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer | |
479 | * for the next loop iteration. | |
1da177e4 LT |
480 | */ |
481 | irbufend = irbp; | |
482 | for (irbp = irbuf; | |
6e57c542 | 483 | irbp < irbufend && ac.ac_ubleft >= statstruct_size; |
bf4a5af2 | 484 | irbp++) { |
1e773c49 | 485 | error = xfs_bulkstat_ag_ichunk(mp, agno, irbp, |
bf4a5af2 | 486 | formatter, statstruct_size, &ac, |
00275899 | 487 | &agino); |
1e773c49 | 488 | if (error) |
febe3cbe | 489 | break; |
1e773c49 | 490 | |
cd57e594 | 491 | cond_resched(); |
1da177e4 | 492 | } |
bf4a5af2 | 493 | |
febe3cbe DC |
494 | /* |
495 | * If we've run out of space or had a formatting error, we | |
496 | * are now done | |
497 | */ | |
498 | if (ac.ac_ubleft < statstruct_size || error) | |
1da177e4 | 499 | break; |
6e57c542 DC |
500 | |
501 | if (end_of_ag) { | |
502 | agno++; | |
503 | agino = 0; | |
00275899 | 504 | } |
1da177e4 LT |
505 | } |
506 | /* | |
507 | * Done, we're either out of filesystem or space to put the data. | |
508 | */ | |
fdd3ccee | 509 | kmem_free(irbuf); |
bf4a5af2 | 510 | *ubcountp = ac.ac_ubelem; |
febe3cbe | 511 | |
cd57e594 | 512 | /* |
febe3cbe DC |
513 | * We found some inodes, so clear the error status and return them. |
514 | * The lastino pointer will point directly at the inode that triggered | |
515 | * any error that occurred, so on the next call the error will be | |
516 | * triggered again and propagated to userspace as there will be no | |
517 | * formatted inodes in the buffer. | |
cd57e594 | 518 | */ |
bf4a5af2 | 519 | if (ac.ac_ubelem) |
febe3cbe DC |
520 | error = 0; |
521 | ||
00275899 DC |
522 | /* |
523 | * If we ran out of filesystem, lastino will point off the end of | |
524 | * the filesystem so the next call will return immediately. | |
525 | */ | |
526 | *lastinop = XFS_AGINO_TO_INO(mp, agno, agino); | |
527 | if (agno >= mp->m_sb.sb_agcount) | |
1da177e4 | 528 | *done = 1; |
1da177e4 | 529 | |
febe3cbe | 530 | return error; |
1da177e4 LT |
531 | } |
532 | ||
faa63e95 MM |
533 | int |
534 | xfs_inumbers_fmt( | |
535 | void __user *ubuffer, /* buffer to write to */ | |
549fa006 | 536 | const struct xfs_inogrp *buffer, /* buffer to read from */ |
faa63e95 MM |
537 | long count, /* # of elements to read */ |
538 | long *written) /* # of bytes written */ | |
539 | { | |
540 | if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer))) | |
541 | return -EFAULT; | |
542 | *written = count * sizeof(*buffer); | |
543 | return 0; | |
544 | } | |
545 | ||
1da177e4 LT |
546 | /* |
547 | * Return inode number table for the filesystem. | |
548 | */ | |
549 | int /* error status */ | |
550 | xfs_inumbers( | |
549fa006 JL |
551 | struct xfs_mount *mp,/* mount point for filesystem */ |
552 | xfs_ino_t *lastino,/* last inode returned */ | |
553 | int *count,/* size of buffer/count returned */ | |
554 | void __user *ubuffer,/* buffer with inode descriptions */ | |
555 | inumbers_fmt_pf formatter) | |
1da177e4 | 556 | { |
549fa006 JL |
557 | xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino); |
558 | xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino); | |
559 | struct xfs_btree_cur *cur = NULL; | |
c7cb51dc | 560 | struct xfs_buf *agbp = NULL; |
549fa006 JL |
561 | struct xfs_inogrp *buffer; |
562 | int bcount; | |
563 | int left = *count; | |
564 | int bufidx = 0; | |
565 | int error = 0; | |
566 | ||
1da177e4 | 567 | *count = 0; |
549fa006 JL |
568 | if (agno >= mp->m_sb.sb_agcount || |
569 | *lastino != XFS_AGINO_TO_INO(mp, agno, agino)) | |
570 | return error; | |
571 | ||
e6a4b37f | 572 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
1da177e4 | 573 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); |
c7cb51dc | 574 | do { |
549fa006 JL |
575 | struct xfs_inobt_rec_incore r; |
576 | int stat; | |
577 | ||
c7cb51dc | 578 | if (!agbp) { |
1da177e4 | 579 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
c7cb51dc JL |
580 | if (error) |
581 | break; | |
582 | ||
57bd3dbe BF |
583 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
584 | XFS_BTNUM_INO); | |
21875505 | 585 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE, |
549fa006 | 586 | &stat); |
c7cb51dc JL |
587 | if (error) |
588 | break; | |
589 | if (!stat) | |
590 | goto next_ag; | |
1da177e4 | 591 | } |
c7cb51dc | 592 | |
549fa006 | 593 | error = xfs_inobt_get_rec(cur, &r, &stat); |
c7cb51dc JL |
594 | if (error) |
595 | break; | |
596 | if (!stat) | |
597 | goto next_ag; | |
598 | ||
2e287a73 CH |
599 | agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1; |
600 | buffer[bufidx].xi_startino = | |
601 | XFS_AGINO_TO_INO(mp, agno, r.ir_startino); | |
602 | buffer[bufidx].xi_alloccount = | |
603 | XFS_INODES_PER_CHUNK - r.ir_freecount; | |
604 | buffer[bufidx].xi_allocmask = ~r.ir_free; | |
c7cb51dc JL |
605 | if (++bufidx == bcount) { |
606 | long written; | |
607 | ||
549fa006 JL |
608 | error = formatter(ubuffer, buffer, bufidx, &written); |
609 | if (error) | |
1da177e4 | 610 | break; |
faa63e95 | 611 | ubuffer += written; |
1da177e4 LT |
612 | *count += bufidx; |
613 | bufidx = 0; | |
614 | } | |
c7cb51dc JL |
615 | if (!--left) |
616 | break; | |
617 | ||
618 | error = xfs_btree_increment(cur, 0, &stat); | |
619 | if (error) | |
620 | break; | |
621 | if (stat) | |
622 | continue; | |
623 | ||
624 | next_ag: | |
625 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
626 | cur = NULL; | |
627 | xfs_buf_relse(agbp); | |
628 | agbp = NULL; | |
629 | agino = 0; | |
a8b1ee8b ES |
630 | agno++; |
631 | } while (agno < mp->m_sb.sb_agcount); | |
c7cb51dc | 632 | |
1da177e4 LT |
633 | if (!error) { |
634 | if (bufidx) { | |
c7cb51dc JL |
635 | long written; |
636 | ||
549fa006 JL |
637 | error = formatter(ubuffer, buffer, bufidx, &written); |
638 | if (!error) | |
1da177e4 LT |
639 | *count += bufidx; |
640 | } | |
641 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); | |
642 | } | |
c7cb51dc | 643 | |
f0e2d93c | 644 | kmem_free(buffer); |
1da177e4 LT |
645 | if (cur) |
646 | xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : | |
647 | XFS_BTREE_NOERROR)); | |
648 | if (agbp) | |
649 | xfs_buf_relse(agbp); | |
c7cb51dc | 650 | |
1da177e4 LT |
651 | return error; |
652 | } |