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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)) | |
70 | return XFS_ERROR(EINVAL); | |
71 | ||
72 | buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL); | |
73 | if (!buf) | |
74 | return XFS_ERROR(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); | |
1da177e4 LT |
79 | if (error) { |
80 | *stat = BULKSTAT_RV_NOTHING; | |
7dce11db | 81 | goto out_free; |
1da177e4 LT |
82 | } |
83 | ||
84 | ASSERT(ip != NULL); | |
92bfc6e7 | 85 | ASSERT(ip->i_imap.im_blkno != 0); |
1da177e4 LT |
86 | |
87 | dic = &ip->i_d; | |
88 | ||
89 | /* xfs_iget returns the following without needing | |
90 | * further change. | |
91 | */ | |
92 | buf->bs_nlink = dic->di_nlink; | |
6743099c AM |
93 | buf->bs_projid_lo = dic->di_projid_lo; |
94 | buf->bs_projid_hi = dic->di_projid_hi; | |
1da177e4 LT |
95 | buf->bs_ino = ino; |
96 | buf->bs_mode = dic->di_mode; | |
97 | buf->bs_uid = dic->di_uid; | |
98 | buf->bs_gid = dic->di_gid; | |
99 | buf->bs_size = dic->di_size; | |
8a9c9980 CH |
100 | buf->bs_atime.tv_sec = dic->di_atime.t_sec; |
101 | buf->bs_atime.tv_nsec = dic->di_atime.t_nsec; | |
102 | buf->bs_mtime.tv_sec = dic->di_mtime.t_sec; | |
103 | buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec; | |
104 | buf->bs_ctime.tv_sec = dic->di_ctime.t_sec; | |
105 | buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec; | |
1da177e4 LT |
106 | buf->bs_xflags = xfs_ip2xflags(ip); |
107 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
108 | buf->bs_extents = dic->di_nextents; | |
109 | buf->bs_gen = dic->di_gen; | |
110 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
111 | buf->bs_dmevmask = dic->di_dmevmask; | |
112 | buf->bs_dmstate = dic->di_dmstate; | |
113 | buf->bs_aextents = dic->di_anextents; | |
07000ee6 | 114 | buf->bs_forkoff = XFS_IFORK_BOFF(ip); |
1da177e4 LT |
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 | } | |
f2d67614 CH |
135 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
136 | IRELE(ip); | |
1da177e4 | 137 | |
7dce11db | 138 | error = formatter(buffer, ubsize, ubused, buf); |
1da177e4 | 139 | |
7dce11db CH |
140 | if (!error) |
141 | *stat = BULKSTAT_RV_DIDONE; | |
1da177e4 | 142 | |
7dce11db CH |
143 | out_free: |
144 | kmem_free(buf); | |
145 | return error; | |
1da177e4 LT |
146 | } |
147 | ||
65fbaf24 | 148 | /* Return 0 on success or positive error */ |
faa63e95 MM |
149 | STATIC int |
150 | xfs_bulkstat_one_fmt( | |
151 | void __user *ubuffer, | |
65fbaf24 | 152 | int ubsize, |
153 | int *ubused, | |
faa63e95 MM |
154 | const xfs_bstat_t *buffer) |
155 | { | |
65fbaf24 | 156 | if (ubsize < sizeof(*buffer)) |
157 | return XFS_ERROR(ENOMEM); | |
faa63e95 | 158 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
65fbaf24 | 159 | return XFS_ERROR(EFAULT); |
160 | if (ubused) | |
161 | *ubused = sizeof(*buffer); | |
162 | return 0; | |
faa63e95 MM |
163 | } |
164 | ||
2ee4fa5c | 165 | int |
166 | xfs_bulkstat_one( | |
167 | xfs_mount_t *mp, /* mount point for filesystem */ | |
168 | xfs_ino_t ino, /* inode number to get data for */ | |
169 | void __user *buffer, /* buffer to place output in */ | |
170 | int ubsize, /* size of buffer */ | |
2ee4fa5c | 171 | int *ubused, /* bytes used by me */ |
2ee4fa5c | 172 | int *stat) /* BULKSTAT_RV_... */ |
173 | { | |
174 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, | |
7b6259e7 | 175 | xfs_bulkstat_one_fmt, ubused, stat); |
8b56f083 NS |
176 | } |
177 | ||
cd57e594 LM |
178 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
179 | ||
1da177e4 LT |
180 | /* |
181 | * Return stat information in bulk (by-inode) for the filesystem. | |
182 | */ | |
183 | int /* error status */ | |
184 | xfs_bulkstat( | |
185 | xfs_mount_t *mp, /* mount point for filesystem */ | |
186 | xfs_ino_t *lastinop, /* last inode returned */ | |
187 | int *ubcountp, /* size of buffer/count returned */ | |
188 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
1da177e4 LT |
189 | size_t statstruct_size, /* sizeof struct filling */ |
190 | char __user *ubuffer, /* buffer with inode stats */ | |
c41564b5 | 191 | int *done) /* 1 if there are more stats to get */ |
1da177e4 LT |
192 | { |
193 | xfs_agblock_t agbno=0;/* allocation group block number */ | |
194 | xfs_buf_t *agbp; /* agi header buffer */ | |
195 | xfs_agi_t *agi; /* agi header data */ | |
196 | xfs_agino_t agino; /* inode # in allocation group */ | |
197 | xfs_agnumber_t agno; /* allocation group number */ | |
1da177e4 LT |
198 | int chunkidx; /* current index into inode chunk */ |
199 | int clustidx; /* current index into inode cluster */ | |
200 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ | |
201 | int end_of_ag; /* set if we've seen the ag end */ | |
202 | int error; /* error code */ | |
203 | int fmterror;/* bulkstat formatter result */ | |
1da177e4 LT |
204 | int i; /* loop index */ |
205 | int icount; /* count of inodes good in irbuf */ | |
215101c3 | 206 | size_t irbsize; /* size of irec buffer in bytes */ |
1da177e4 | 207 | xfs_ino_t ino; /* inode number (filesystem) */ |
26275093 NS |
208 | xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */ |
209 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ | |
210 | xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */ | |
cd57e594 | 211 | xfs_ino_t lastino; /* last inode number returned */ |
1da177e4 LT |
212 | int nbcluster; /* # of blocks in a cluster */ |
213 | int nicluster; /* # of inodes in a cluster */ | |
214 | int nimask; /* mask for inode clusters */ | |
215 | int nirbuf; /* size of irbuf */ | |
216 | int rval; /* return value error code */ | |
217 | int tmp; /* result value from btree calls */ | |
218 | int ubcount; /* size of user's buffer */ | |
219 | int ubleft; /* bytes left in user's buffer */ | |
220 | char __user *ubufp; /* pointer into user's buffer */ | |
221 | int ubelem; /* spaces used in user's buffer */ | |
222 | int ubused; /* bytes used by formatter */ | |
1da177e4 LT |
223 | |
224 | /* | |
225 | * Get the last inode value, see if there's nothing to do. | |
226 | */ | |
227 | ino = (xfs_ino_t)*lastinop; | |
cd57e594 | 228 | lastino = ino; |
1da177e4 LT |
229 | agno = XFS_INO_TO_AGNO(mp, ino); |
230 | agino = XFS_INO_TO_AGINO(mp, ino); | |
231 | if (agno >= mp->m_sb.sb_agcount || | |
232 | ino != XFS_AGINO_TO_INO(mp, agno, agino)) { | |
233 | *done = 1; | |
234 | *ubcountp = 0; | |
235 | return 0; | |
236 | } | |
cd57e594 LM |
237 | if (!ubcountp || *ubcountp <= 0) { |
238 | return EINVAL; | |
239 | } | |
1da177e4 LT |
240 | ubcount = *ubcountp; /* statstruct's */ |
241 | ubleft = ubcount * statstruct_size; /* bytes */ | |
242 | *ubcountp = ubelem = 0; | |
243 | *done = 0; | |
244 | fmterror = 0; | |
245 | ubufp = ubuffer; | |
246 | nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ? | |
247 | mp->m_sb.sb_inopblock : | |
248 | (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog); | |
249 | nimask = ~(nicluster - 1); | |
250 | nbcluster = nicluster >> mp->m_sb.sb_inopblog; | |
bdfb0430 CH |
251 | irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4); |
252 | if (!irbuf) | |
253 | return ENOMEM; | |
254 | ||
bb3c7d29 NS |
255 | nirbuf = irbsize / sizeof(*irbuf); |
256 | ||
1da177e4 LT |
257 | /* |
258 | * Loop over the allocation groups, starting from the last | |
259 | * inode returned; 0 means start of the allocation group. | |
260 | */ | |
261 | rval = 0; | |
cd57e594 LM |
262 | while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) { |
263 | cond_resched(); | |
1da177e4 | 264 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
1da177e4 LT |
265 | if (error) { |
266 | /* | |
267 | * Skip this allocation group and go to the next one. | |
268 | */ | |
269 | agno++; | |
270 | agino = 0; | |
271 | continue; | |
272 | } | |
273 | agi = XFS_BUF_TO_AGI(agbp); | |
274 | /* | |
275 | * Allocate and initialize a btree cursor for ialloc btree. | |
276 | */ | |
561f7d17 | 277 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno); |
1da177e4 LT |
278 | irbp = irbuf; |
279 | irbufend = irbuf + nirbuf; | |
280 | end_of_ag = 0; | |
281 | /* | |
282 | * If we're returning in the middle of an allocation group, | |
283 | * we need to get the remainder of the chunk we're in. | |
284 | */ | |
285 | if (agino > 0) { | |
2e287a73 CH |
286 | xfs_inobt_rec_incore_t r; |
287 | ||
1da177e4 LT |
288 | /* |
289 | * Lookup the inode chunk that this inode lives in. | |
290 | */ | |
21875505 CH |
291 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, |
292 | &tmp); | |
1da177e4 LT |
293 | if (!error && /* no I/O error */ |
294 | tmp && /* lookup succeeded */ | |
295 | /* got the record, should always work */ | |
2e287a73 | 296 | !(error = xfs_inobt_get_rec(cur, &r, &i)) && |
1da177e4 LT |
297 | i == 1 && |
298 | /* this is the right chunk */ | |
2e287a73 | 299 | agino < r.ir_startino + XFS_INODES_PER_CHUNK && |
1da177e4 | 300 | /* lastino was not last in chunk */ |
2e287a73 | 301 | (chunkidx = agino - r.ir_startino + 1) < |
1da177e4 LT |
302 | XFS_INODES_PER_CHUNK && |
303 | /* there are some left allocated */ | |
9d87c319 | 304 | xfs_inobt_maskn(chunkidx, |
2e287a73 CH |
305 | XFS_INODES_PER_CHUNK - chunkidx) & |
306 | ~r.ir_free) { | |
1da177e4 LT |
307 | /* |
308 | * Grab the chunk record. Mark all the | |
309 | * uninteresting inodes (because they're | |
310 | * before our start point) free. | |
311 | */ | |
312 | for (i = 0; i < chunkidx; i++) { | |
2e287a73 CH |
313 | if (XFS_INOBT_MASK(i) & ~r.ir_free) |
314 | r.ir_freecount++; | |
1da177e4 | 315 | } |
2e287a73 CH |
316 | r.ir_free |= xfs_inobt_maskn(0, chunkidx); |
317 | irbp->ir_startino = r.ir_startino; | |
318 | irbp->ir_freecount = r.ir_freecount; | |
319 | irbp->ir_free = r.ir_free; | |
1da177e4 | 320 | irbp++; |
2e287a73 CH |
321 | agino = r.ir_startino + XFS_INODES_PER_CHUNK; |
322 | icount = XFS_INODES_PER_CHUNK - r.ir_freecount; | |
1da177e4 LT |
323 | } else { |
324 | /* | |
325 | * If any of those tests failed, bump the | |
326 | * inode number (just in case). | |
327 | */ | |
328 | agino++; | |
329 | icount = 0; | |
330 | } | |
331 | /* | |
332 | * In any case, increment to the next record. | |
333 | */ | |
334 | if (!error) | |
637aa50f | 335 | error = xfs_btree_increment(cur, 0, &tmp); |
1da177e4 LT |
336 | } else { |
337 | /* | |
338 | * Start of ag. Lookup the first inode chunk. | |
339 | */ | |
21875505 | 340 | error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp); |
1da177e4 LT |
341 | icount = 0; |
342 | } | |
343 | /* | |
344 | * Loop through inode btree records in this ag, | |
345 | * until we run out of inodes or space in the buffer. | |
346 | */ | |
347 | while (irbp < irbufend && icount < ubcount) { | |
2e287a73 CH |
348 | xfs_inobt_rec_incore_t r; |
349 | ||
1da177e4 LT |
350 | /* |
351 | * Loop as long as we're unable to read the | |
352 | * inode btree. | |
353 | */ | |
354 | while (error) { | |
355 | agino += XFS_INODES_PER_CHUNK; | |
356 | if (XFS_AGINO_TO_AGBNO(mp, agino) >= | |
16259e7d | 357 | be32_to_cpu(agi->agi_length)) |
1da177e4 | 358 | break; |
21875505 CH |
359 | error = xfs_inobt_lookup(cur, agino, |
360 | XFS_LOOKUP_GE, &tmp); | |
cd57e594 | 361 | cond_resched(); |
1da177e4 LT |
362 | } |
363 | /* | |
364 | * If ran off the end of the ag either with an error, | |
365 | * or the normal way, set end and stop collecting. | |
366 | */ | |
2e287a73 CH |
367 | if (error) { |
368 | end_of_ag = 1; | |
369 | break; | |
370 | } | |
371 | ||
372 | error = xfs_inobt_get_rec(cur, &r, &i); | |
373 | if (error || i == 0) { | |
1da177e4 LT |
374 | end_of_ag = 1; |
375 | break; | |
376 | } | |
2e287a73 | 377 | |
1da177e4 LT |
378 | /* |
379 | * If this chunk has any allocated inodes, save it. | |
26275093 | 380 | * Also start read-ahead now for this chunk. |
1da177e4 | 381 | */ |
2e287a73 | 382 | if (r.ir_freecount < XFS_INODES_PER_CHUNK) { |
cbb2864a | 383 | struct blk_plug plug; |
26275093 NS |
384 | /* |
385 | * Loop over all clusters in the next chunk. | |
386 | * Do a readahead if there are any allocated | |
387 | * inodes in that cluster. | |
388 | */ | |
cbb2864a | 389 | blk_start_plug(&plug); |
2e287a73 CH |
390 | agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino); |
391 | for (chunkidx = 0; | |
26275093 NS |
392 | chunkidx < XFS_INODES_PER_CHUNK; |
393 | chunkidx += nicluster, | |
394 | agbno += nbcluster) { | |
2e287a73 CH |
395 | if (xfs_inobt_maskn(chunkidx, nicluster) |
396 | & ~r.ir_free) | |
26275093 | 397 | xfs_btree_reada_bufs(mp, agno, |
3d3e6f64 | 398 | agbno, nbcluster, |
1813dd64 | 399 | &xfs_inode_buf_ops); |
26275093 | 400 | } |
cbb2864a | 401 | blk_finish_plug(&plug); |
2e287a73 CH |
402 | irbp->ir_startino = r.ir_startino; |
403 | irbp->ir_freecount = r.ir_freecount; | |
404 | irbp->ir_free = r.ir_free; | |
1da177e4 | 405 | irbp++; |
2e287a73 | 406 | icount += XFS_INODES_PER_CHUNK - r.ir_freecount; |
1da177e4 LT |
407 | } |
408 | /* | |
409 | * Set agino to after this chunk and bump the cursor. | |
410 | */ | |
2e287a73 | 411 | agino = r.ir_startino + XFS_INODES_PER_CHUNK; |
637aa50f | 412 | error = xfs_btree_increment(cur, 0, &tmp); |
cd57e594 | 413 | cond_resched(); |
1da177e4 LT |
414 | } |
415 | /* | |
416 | * Drop the btree buffers and the agi buffer. | |
417 | * We can't hold any of the locks these represent | |
418 | * when calling iget. | |
419 | */ | |
420 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
421 | xfs_buf_relse(agbp); | |
422 | /* | |
423 | * Now format all the good inodes into the user's buffer. | |
424 | */ | |
425 | irbufend = irbp; | |
426 | for (irbp = irbuf; | |
cd57e594 | 427 | irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) { |
1da177e4 LT |
428 | /* |
429 | * Now process this chunk of inodes. | |
430 | */ | |
26275093 | 431 | for (agino = irbp->ir_startino, chunkidx = clustidx = 0; |
cd57e594 | 432 | XFS_BULKSTAT_UBLEFT(ubleft) && |
26275093 | 433 | irbp->ir_freecount < XFS_INODES_PER_CHUNK; |
1da177e4 LT |
434 | chunkidx++, clustidx++, agino++) { |
435 | ASSERT(chunkidx < XFS_INODES_PER_CHUNK); | |
9cee4c5b | 436 | |
c2cba57e | 437 | ino = XFS_AGINO_TO_INO(mp, agno, agino); |
1da177e4 LT |
438 | /* |
439 | * Skip if this inode is free. | |
440 | */ | |
c2cba57e LM |
441 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) { |
442 | lastino = ino; | |
1da177e4 | 443 | continue; |
c2cba57e | 444 | } |
1da177e4 LT |
445 | /* |
446 | * Count used inodes as free so we can tell | |
447 | * when the chunk is used up. | |
448 | */ | |
26275093 | 449 | irbp->ir_freecount++; |
1da177e4 LT |
450 | |
451 | /* | |
452 | * Get the inode and fill in a single buffer. | |
1da177e4 LT |
453 | */ |
454 | ubused = statstruct_size; | |
7b6259e7 | 455 | error = formatter(mp, ino, ubufp, ubleft, |
7dce11db | 456 | &ubused, &fmterror); |
1da177e4 | 457 | if (fmterror == BULKSTAT_RV_NOTHING) { |
cd57e594 LM |
458 | if (error && error != ENOENT && |
459 | error != EINVAL) { | |
e132f54c | 460 | ubleft = 0; |
cd57e594 LM |
461 | rval = error; |
462 | break; | |
463 | } | |
464 | lastino = ino; | |
1da177e4 LT |
465 | continue; |
466 | } | |
467 | if (fmterror == BULKSTAT_RV_GIVEUP) { | |
468 | ubleft = 0; | |
469 | ASSERT(error); | |
470 | rval = error; | |
471 | break; | |
472 | } | |
473 | if (ubufp) | |
474 | ubufp += ubused; | |
475 | ubleft -= ubused; | |
476 | ubelem++; | |
477 | lastino = ino; | |
478 | } | |
cd57e594 LM |
479 | |
480 | cond_resched(); | |
1da177e4 | 481 | } |
1da177e4 LT |
482 | /* |
483 | * Set up for the next loop iteration. | |
484 | */ | |
cd57e594 | 485 | if (XFS_BULKSTAT_UBLEFT(ubleft)) { |
1da177e4 LT |
486 | if (end_of_ag) { |
487 | agno++; | |
488 | agino = 0; | |
cd57e594 LM |
489 | } else |
490 | agino = XFS_INO_TO_AGINO(mp, lastino); | |
1da177e4 LT |
491 | } else |
492 | break; | |
493 | } | |
494 | /* | |
495 | * Done, we're either out of filesystem or space to put the data. | |
496 | */ | |
fdd3ccee | 497 | kmem_free(irbuf); |
1da177e4 | 498 | *ubcountp = ubelem; |
cd57e594 LM |
499 | /* |
500 | * Found some inodes, return them now and return the error next time. | |
501 | */ | |
502 | if (ubelem) | |
503 | rval = 0; | |
1da177e4 LT |
504 | if (agno >= mp->m_sb.sb_agcount) { |
505 | /* | |
506 | * If we ran out of filesystem, mark lastino as off | |
507 | * the end of the filesystem, so the next call | |
508 | * will return immediately. | |
509 | */ | |
510 | *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0); | |
511 | *done = 1; | |
512 | } else | |
513 | *lastinop = (xfs_ino_t)lastino; | |
514 | ||
515 | return rval; | |
516 | } | |
517 | ||
518 | /* | |
519 | * Return stat information in bulk (by-inode) for the filesystem. | |
520 | * Special case for non-sequential one inode bulkstat. | |
521 | */ | |
522 | int /* error status */ | |
523 | xfs_bulkstat_single( | |
524 | xfs_mount_t *mp, /* mount point for filesystem */ | |
525 | xfs_ino_t *lastinop, /* inode to return */ | |
526 | char __user *buffer, /* buffer with inode stats */ | |
c41564b5 | 527 | int *done) /* 1 if there are more stats to get */ |
1da177e4 LT |
528 | { |
529 | int count; /* count value for bulkstat call */ | |
530 | int error; /* return value */ | |
531 | xfs_ino_t ino; /* filesystem inode number */ | |
532 | int res; /* result from bs1 */ | |
533 | ||
534 | /* | |
535 | * note that requesting valid inode numbers which are not allocated | |
475ee413 | 536 | * to inodes will most likely cause xfs_imap_to_bp to generate warning |
1da177e4 LT |
537 | * messages about bad magic numbers. This is ok. The fact that |
538 | * the inode isn't actually an inode is handled by the | |
539 | * error check below. Done this way to make the usual case faster | |
540 | * at the expense of the error case. | |
541 | */ | |
542 | ||
a30b0367 DC |
543 | ino = *lastinop; |
544 | error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), | |
545 | NULL, &res); | |
1da177e4 LT |
546 | if (error) { |
547 | /* | |
548 | * Special case way failed, do it the "long" way | |
549 | * to see if that works. | |
550 | */ | |
551 | (*lastinop)--; | |
552 | count = 1; | |
553 | if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one, | |
7dce11db | 554 | sizeof(xfs_bstat_t), buffer, done)) |
1da177e4 LT |
555 | return error; |
556 | if (count == 0 || (xfs_ino_t)*lastinop != ino) | |
557 | return error == EFSCORRUPTED ? | |
558 | XFS_ERROR(EINVAL) : error; | |
559 | else | |
560 | return 0; | |
561 | } | |
562 | *done = 0; | |
563 | return 0; | |
564 | } | |
565 | ||
faa63e95 MM |
566 | int |
567 | xfs_inumbers_fmt( | |
568 | void __user *ubuffer, /* buffer to write to */ | |
569 | const xfs_inogrp_t *buffer, /* buffer to read from */ | |
570 | long count, /* # of elements to read */ | |
571 | long *written) /* # of bytes written */ | |
572 | { | |
573 | if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer))) | |
574 | return -EFAULT; | |
575 | *written = count * sizeof(*buffer); | |
576 | return 0; | |
577 | } | |
578 | ||
1da177e4 LT |
579 | /* |
580 | * Return inode number table for the filesystem. | |
581 | */ | |
582 | int /* error status */ | |
583 | xfs_inumbers( | |
584 | xfs_mount_t *mp, /* mount point for filesystem */ | |
585 | xfs_ino_t *lastino, /* last inode returned */ | |
586 | int *count, /* size of buffer/count returned */ | |
faa63e95 MM |
587 | void __user *ubuffer,/* buffer with inode descriptions */ |
588 | inumbers_fmt_pf formatter) | |
1da177e4 LT |
589 | { |
590 | xfs_buf_t *agbp; | |
591 | xfs_agino_t agino; | |
592 | xfs_agnumber_t agno; | |
593 | int bcount; | |
594 | xfs_inogrp_t *buffer; | |
595 | int bufidx; | |
596 | xfs_btree_cur_t *cur; | |
597 | int error; | |
2e287a73 | 598 | xfs_inobt_rec_incore_t r; |
1da177e4 LT |
599 | int i; |
600 | xfs_ino_t ino; | |
601 | int left; | |
602 | int tmp; | |
603 | ||
604 | ino = (xfs_ino_t)*lastino; | |
605 | agno = XFS_INO_TO_AGNO(mp, ino); | |
606 | agino = XFS_INO_TO_AGINO(mp, ino); | |
607 | left = *count; | |
608 | *count = 0; | |
e6a4b37f | 609 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
1da177e4 LT |
610 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); |
611 | error = bufidx = 0; | |
612 | cur = NULL; | |
613 | agbp = NULL; | |
614 | while (left > 0 && agno < mp->m_sb.sb_agcount) { | |
615 | if (agbp == NULL) { | |
1da177e4 | 616 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
1da177e4 LT |
617 | if (error) { |
618 | /* | |
619 | * If we can't read the AGI of this ag, | |
620 | * then just skip to the next one. | |
621 | */ | |
622 | ASSERT(cur == NULL); | |
623 | agbp = NULL; | |
624 | agno++; | |
625 | agino = 0; | |
626 | continue; | |
627 | } | |
561f7d17 | 628 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno); |
21875505 CH |
629 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE, |
630 | &tmp); | |
1da177e4 LT |
631 | if (error) { |
632 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
633 | cur = NULL; | |
634 | xfs_buf_relse(agbp); | |
635 | agbp = NULL; | |
636 | /* | |
59c51591 | 637 | * Move up the last inode in the current |
1da177e4 LT |
638 | * chunk. The lookup_ge will always get |
639 | * us the first inode in the next chunk. | |
640 | */ | |
641 | agino += XFS_INODES_PER_CHUNK - 1; | |
642 | continue; | |
643 | } | |
644 | } | |
2e287a73 CH |
645 | error = xfs_inobt_get_rec(cur, &r, &i); |
646 | if (error || i == 0) { | |
1da177e4 LT |
647 | xfs_buf_relse(agbp); |
648 | agbp = NULL; | |
649 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
650 | cur = NULL; | |
651 | agno++; | |
652 | agino = 0; | |
653 | continue; | |
654 | } | |
2e287a73 CH |
655 | agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1; |
656 | buffer[bufidx].xi_startino = | |
657 | XFS_AGINO_TO_INO(mp, agno, r.ir_startino); | |
658 | buffer[bufidx].xi_alloccount = | |
659 | XFS_INODES_PER_CHUNK - r.ir_freecount; | |
660 | buffer[bufidx].xi_allocmask = ~r.ir_free; | |
1da177e4 LT |
661 | bufidx++; |
662 | left--; | |
663 | if (bufidx == bcount) { | |
faa63e95 MM |
664 | long written; |
665 | if (formatter(ubuffer, buffer, bufidx, &written)) { | |
1da177e4 LT |
666 | error = XFS_ERROR(EFAULT); |
667 | break; | |
668 | } | |
faa63e95 | 669 | ubuffer += written; |
1da177e4 LT |
670 | *count += bufidx; |
671 | bufidx = 0; | |
672 | } | |
673 | if (left) { | |
637aa50f | 674 | error = xfs_btree_increment(cur, 0, &tmp); |
1da177e4 LT |
675 | if (error) { |
676 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
677 | cur = NULL; | |
678 | xfs_buf_relse(agbp); | |
679 | agbp = NULL; | |
680 | /* | |
681 | * The agino value has already been bumped. | |
682 | * Just try to skip up to it. | |
683 | */ | |
684 | agino += XFS_INODES_PER_CHUNK; | |
685 | continue; | |
686 | } | |
687 | } | |
688 | } | |
689 | if (!error) { | |
690 | if (bufidx) { | |
faa63e95 MM |
691 | long written; |
692 | if (formatter(ubuffer, buffer, bufidx, &written)) | |
1da177e4 LT |
693 | error = XFS_ERROR(EFAULT); |
694 | else | |
695 | *count += bufidx; | |
696 | } | |
697 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); | |
698 | } | |
f0e2d93c | 699 | kmem_free(buffer); |
1da177e4 LT |
700 | if (cur) |
701 | xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : | |
702 | XFS_BTREE_NOERROR)); | |
703 | if (agbp) | |
704 | xfs_buf_relse(agbp); | |
705 | return error; | |
706 | } |