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 | |
26788097 | 34 | 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 */ | |
3987848c | 60 | struct inode *inode; |
7dce11db CH |
61 | struct xfs_bstat *buf; /* return buffer */ |
62 | int error = 0; /* error value */ | |
63 | ||
64 | *stat = BULKSTAT_RV_NOTHING; | |
65 | ||
66 | if (!buffer || xfs_internal_inum(mp, ino)) | |
2451337d | 67 | return -EINVAL; |
7dce11db | 68 | |
f7ca3522 | 69 | buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL); |
7dce11db | 70 | if (!buf) |
2451337d | 71 | return -ENOMEM; |
1da177e4 | 72 | |
745b1f47 | 73 | error = xfs_iget(mp, NULL, ino, |
5132ba8f DC |
74 | (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED), |
75 | XFS_ILOCK_SHARED, &ip); | |
8fe65776 | 76 | if (error) |
7dce11db | 77 | goto out_free; |
1da177e4 LT |
78 | |
79 | ASSERT(ip != NULL); | |
92bfc6e7 | 80 | ASSERT(ip->i_imap.im_blkno != 0); |
3987848c | 81 | inode = VFS_I(ip); |
1da177e4 LT |
82 | |
83 | dic = &ip->i_d; | |
84 | ||
85 | /* xfs_iget returns the following without needing | |
86 | * further change. | |
87 | */ | |
6743099c AM |
88 | buf->bs_projid_lo = dic->di_projid_lo; |
89 | buf->bs_projid_hi = dic->di_projid_hi; | |
1da177e4 | 90 | buf->bs_ino = ino; |
1da177e4 LT |
91 | buf->bs_uid = dic->di_uid; |
92 | buf->bs_gid = dic->di_gid; | |
93 | buf->bs_size = dic->di_size; | |
3987848c | 94 | |
54d7b5c1 | 95 | buf->bs_nlink = inode->i_nlink; |
3987848c DC |
96 | buf->bs_atime.tv_sec = inode->i_atime.tv_sec; |
97 | buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec; | |
98 | buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec; | |
99 | buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec; | |
100 | buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec; | |
101 | buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec; | |
9e9a2674 | 102 | buf->bs_gen = inode->i_generation; |
c19b3b05 | 103 | buf->bs_mode = inode->i_mode; |
3987848c | 104 | |
1da177e4 LT |
105 | buf->bs_xflags = xfs_ip2xflags(ip); |
106 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
107 | buf->bs_extents = dic->di_nextents; | |
1da177e4 LT |
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 | 113 | |
f7ca3522 DW |
114 | if (dic->di_version == 3) { |
115 | if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE) | |
116 | buf->bs_cowextsize = dic->di_cowextsize << | |
117 | mp->m_sb.sb_blocklog; | |
118 | } | |
119 | ||
1da177e4 LT |
120 | switch (dic->di_format) { |
121 | case XFS_DINODE_FMT_DEV: | |
122 | buf->bs_rdev = ip->i_df.if_u2.if_rdev; | |
123 | buf->bs_blksize = BLKDEV_IOSIZE; | |
124 | buf->bs_blocks = 0; | |
125 | break; | |
126 | case XFS_DINODE_FMT_LOCAL: | |
127 | case XFS_DINODE_FMT_UUID: | |
128 | buf->bs_rdev = 0; | |
129 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
130 | buf->bs_blocks = 0; | |
131 | break; | |
132 | case XFS_DINODE_FMT_EXTENTS: | |
133 | case XFS_DINODE_FMT_BTREE: | |
134 | buf->bs_rdev = 0; | |
135 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
136 | buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; | |
137 | break; | |
138 | } | |
f2d67614 CH |
139 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
140 | IRELE(ip); | |
1da177e4 | 141 | |
7dce11db | 142 | error = formatter(buffer, ubsize, ubused, buf); |
7dce11db CH |
143 | if (!error) |
144 | *stat = BULKSTAT_RV_DIDONE; | |
1da177e4 | 145 | |
7dce11db CH |
146 | out_free: |
147 | kmem_free(buf); | |
148 | return error; | |
1da177e4 LT |
149 | } |
150 | ||
65fbaf24 | 151 | /* Return 0 on success or positive error */ |
faa63e95 MM |
152 | STATIC int |
153 | xfs_bulkstat_one_fmt( | |
154 | void __user *ubuffer, | |
65fbaf24 | 155 | int ubsize, |
156 | int *ubused, | |
faa63e95 MM |
157 | const xfs_bstat_t *buffer) |
158 | { | |
65fbaf24 | 159 | if (ubsize < sizeof(*buffer)) |
2451337d | 160 | return -ENOMEM; |
faa63e95 | 161 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
2451337d | 162 | return -EFAULT; |
65fbaf24 | 163 | if (ubused) |
164 | *ubused = sizeof(*buffer); | |
165 | return 0; | |
faa63e95 MM |
166 | } |
167 | ||
2ee4fa5c | 168 | int |
169 | xfs_bulkstat_one( | |
170 | xfs_mount_t *mp, /* mount point for filesystem */ | |
171 | xfs_ino_t ino, /* inode number to get data for */ | |
172 | void __user *buffer, /* buffer to place output in */ | |
173 | int ubsize, /* size of buffer */ | |
2ee4fa5c | 174 | int *ubused, /* bytes used by me */ |
2ee4fa5c | 175 | int *stat) /* BULKSTAT_RV_... */ |
176 | { | |
177 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, | |
7b6259e7 | 178 | xfs_bulkstat_one_fmt, ubused, stat); |
8b56f083 NS |
179 | } |
180 | ||
4b8fdfec JL |
181 | /* |
182 | * Loop over all clusters in a chunk for a given incore inode allocation btree | |
183 | * record. Do a readahead if there are any allocated inodes in that cluster. | |
184 | */ | |
185 | STATIC void | |
186 | xfs_bulkstat_ichunk_ra( | |
187 | struct xfs_mount *mp, | |
188 | xfs_agnumber_t agno, | |
189 | struct xfs_inobt_rec_incore *irec) | |
190 | { | |
191 | xfs_agblock_t agbno; | |
192 | struct blk_plug plug; | |
193 | int blks_per_cluster; | |
194 | int inodes_per_cluster; | |
195 | int i; /* inode chunk index */ | |
196 | ||
197 | agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino); | |
198 | blks_per_cluster = xfs_icluster_size_fsb(mp); | |
199 | inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog; | |
200 | ||
201 | blk_start_plug(&plug); | |
202 | for (i = 0; i < XFS_INODES_PER_CHUNK; | |
203 | i += inodes_per_cluster, agbno += blks_per_cluster) { | |
204 | if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) { | |
205 | xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster, | |
206 | &xfs_inode_buf_ops); | |
207 | } | |
208 | } | |
209 | blk_finish_plug(&plug); | |
210 | } | |
211 | ||
f3d1e587 JL |
212 | /* |
213 | * Lookup the inode chunk that the given inode lives in and then get the record | |
214 | * if we found the chunk. If the inode was not the last in the chunk and there | |
215 | * are some left allocated, update the data for the pointed-to record as well as | |
216 | * return the count of grabbed inodes. | |
217 | */ | |
218 | STATIC int | |
219 | xfs_bulkstat_grab_ichunk( | |
220 | struct xfs_btree_cur *cur, /* btree cursor */ | |
221 | xfs_agino_t agino, /* starting inode of chunk */ | |
222 | int *icount,/* return # of inodes grabbed */ | |
223 | struct xfs_inobt_rec_incore *irec) /* btree record */ | |
224 | { | |
225 | int idx; /* index into inode chunk */ | |
226 | int stat; | |
227 | int error = 0; | |
228 | ||
229 | /* Lookup the inode chunk that this inode lives in */ | |
230 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat); | |
231 | if (error) | |
232 | return error; | |
233 | if (!stat) { | |
234 | *icount = 0; | |
235 | return error; | |
236 | } | |
237 | ||
238 | /* Get the record, should always work */ | |
239 | error = xfs_inobt_get_rec(cur, irec, &stat); | |
240 | if (error) | |
241 | return error; | |
5fb5aeee | 242 | XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1); |
f3d1e587 JL |
243 | |
244 | /* Check if the record contains the inode in request */ | |
febe3cbe DC |
245 | if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) { |
246 | *icount = 0; | |
247 | return 0; | |
248 | } | |
f3d1e587 JL |
249 | |
250 | idx = agino - irec->ir_startino + 1; | |
251 | if (idx < XFS_INODES_PER_CHUNK && | |
252 | (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) { | |
253 | int i; | |
254 | ||
255 | /* We got a right chunk with some left inodes allocated at it. | |
256 | * Grab the chunk record. Mark all the uninteresting inodes | |
257 | * free -- because they're before our start point. | |
258 | */ | |
259 | for (i = 0; i < idx; i++) { | |
260 | if (XFS_INOBT_MASK(i) & ~irec->ir_free) | |
261 | irec->ir_freecount++; | |
262 | } | |
263 | ||
264 | irec->ir_free |= xfs_inobt_maskn(0, idx); | |
12d0714d | 265 | *icount = irec->ir_count - irec->ir_freecount; |
f3d1e587 JL |
266 | } |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
cd57e594 LM |
271 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
272 | ||
bf4a5af2 DC |
273 | struct xfs_bulkstat_agichunk { |
274 | char __user **ac_ubuffer;/* pointer into user's buffer */ | |
275 | int ac_ubleft; /* bytes left in user's buffer */ | |
276 | int ac_ubelem; /* spaces used in user's buffer */ | |
277 | }; | |
278 | ||
1e773c49 JL |
279 | /* |
280 | * Process inodes in chunk with a pointer to a formatter function | |
281 | * that will iget the inode and fill in the appropriate structure. | |
282 | */ | |
bf4a5af2 | 283 | static int |
1e773c49 JL |
284 | xfs_bulkstat_ag_ichunk( |
285 | struct xfs_mount *mp, | |
286 | xfs_agnumber_t agno, | |
287 | struct xfs_inobt_rec_incore *irbp, | |
288 | bulkstat_one_pf formatter, | |
289 | size_t statstruct_size, | |
bf4a5af2 | 290 | struct xfs_bulkstat_agichunk *acp, |
00275899 | 291 | xfs_agino_t *last_agino) |
1e773c49 | 292 | { |
1e773c49 | 293 | char __user **ubufp = acp->ac_ubuffer; |
2b831ac6 | 294 | int chunkidx; |
1e773c49 | 295 | int error = 0; |
00275899 | 296 | xfs_agino_t agino = irbp->ir_startino; |
1e773c49 | 297 | |
2b831ac6 DC |
298 | for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK; |
299 | chunkidx++, agino++) { | |
300 | int fmterror; | |
1e773c49 | 301 | int ubused; |
00275899 DC |
302 | |
303 | /* inode won't fit in buffer, we are done */ | |
304 | if (acp->ac_ubleft < statstruct_size) | |
305 | break; | |
1e773c49 | 306 | |
1e773c49 | 307 | /* Skip if this inode is free */ |
00275899 | 308 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) |
1e773c49 | 309 | continue; |
1e773c49 | 310 | |
1e773c49 JL |
311 | /* Get the inode and fill in a single buffer */ |
312 | ubused = statstruct_size; | |
00275899 DC |
313 | error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino), |
314 | *ubufp, acp->ac_ubleft, &ubused, &fmterror); | |
315 | ||
2b831ac6 DC |
316 | if (fmterror == BULKSTAT_RV_GIVEUP || |
317 | (error && error != -ENOENT && error != -EINVAL)) { | |
318 | acp->ac_ubleft = 0; | |
1e773c49 JL |
319 | ASSERT(error); |
320 | break; | |
321 | } | |
2b831ac6 DC |
322 | |
323 | /* be careful not to leak error if at end of chunk */ | |
324 | if (fmterror == BULKSTAT_RV_NOTHING || error) { | |
2b831ac6 DC |
325 | error = 0; |
326 | continue; | |
327 | } | |
328 | ||
329 | *ubufp += ubused; | |
330 | acp->ac_ubleft -= ubused; | |
331 | acp->ac_ubelem++; | |
2b831ac6 | 332 | } |
1e773c49 | 333 | |
00275899 DC |
334 | /* |
335 | * Post-update *last_agino. At this point, agino will always point one | |
336 | * inode past the last inode we processed successfully. Hence we | |
337 | * substract that inode when setting the *last_agino cursor so that we | |
338 | * return the correct cookie to userspace. On the next bulkstat call, | |
339 | * the inode under the lastino cookie will be skipped as we have already | |
340 | * processed it here. | |
341 | */ | |
342 | *last_agino = agino - 1; | |
343 | ||
1e773c49 JL |
344 | return error; |
345 | } | |
346 | ||
1da177e4 LT |
347 | /* |
348 | * Return stat information in bulk (by-inode) for the filesystem. | |
349 | */ | |
350 | int /* error status */ | |
351 | xfs_bulkstat( | |
352 | xfs_mount_t *mp, /* mount point for filesystem */ | |
353 | xfs_ino_t *lastinop, /* last inode returned */ | |
354 | int *ubcountp, /* size of buffer/count returned */ | |
355 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
1da177e4 LT |
356 | size_t statstruct_size, /* sizeof struct filling */ |
357 | char __user *ubuffer, /* buffer with inode stats */ | |
c41564b5 | 358 | int *done) /* 1 if there are more stats to get */ |
1da177e4 | 359 | { |
1da177e4 | 360 | xfs_buf_t *agbp; /* agi header buffer */ |
1da177e4 LT |
361 | xfs_agino_t agino; /* inode # in allocation group */ |
362 | xfs_agnumber_t agno; /* allocation group number */ | |
1da177e4 | 363 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ |
26275093 | 364 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ |
1da177e4 | 365 | int nirbuf; /* size of irbuf */ |
1da177e4 | 366 | int ubcount; /* size of user's buffer */ |
bf4a5af2 | 367 | struct xfs_bulkstat_agichunk ac; |
6e57c542 | 368 | int error = 0; |
1da177e4 LT |
369 | |
370 | /* | |
371 | * Get the last inode value, see if there's nothing to do. | |
372 | */ | |
00275899 DC |
373 | agno = XFS_INO_TO_AGNO(mp, *lastinop); |
374 | agino = XFS_INO_TO_AGINO(mp, *lastinop); | |
1da177e4 | 375 | if (agno >= mp->m_sb.sb_agcount || |
00275899 | 376 | *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) { |
1da177e4 LT |
377 | *done = 1; |
378 | *ubcountp = 0; | |
379 | return 0; | |
380 | } | |
296dfd7f | 381 | |
1da177e4 | 382 | ubcount = *ubcountp; /* statstruct's */ |
bf4a5af2 DC |
383 | ac.ac_ubuffer = &ubuffer; |
384 | ac.ac_ubleft = ubcount * statstruct_size; /* bytes */; | |
385 | ac.ac_ubelem = 0; | |
386 | ||
387 | *ubcountp = 0; | |
1da177e4 | 388 | *done = 0; |
bf4a5af2 | 389 | |
08b005f1 | 390 | irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP); |
bdfb0430 | 391 | if (!irbuf) |
2451337d | 392 | return -ENOMEM; |
08b005f1 | 393 | nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf); |
bb3c7d29 | 394 | |
1da177e4 LT |
395 | /* |
396 | * Loop over the allocation groups, starting from the last | |
397 | * inode returned; 0 means start of the allocation group. | |
398 | */ | |
6e57c542 DC |
399 | while (agno < mp->m_sb.sb_agcount) { |
400 | struct xfs_inobt_rec_incore *irbp = irbuf; | |
401 | struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf; | |
402 | bool end_of_ag = false; | |
403 | int icount = 0; | |
404 | int stat; | |
405 | ||
1da177e4 | 406 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
d4c27348 JL |
407 | if (error) |
408 | break; | |
1da177e4 LT |
409 | /* |
410 | * Allocate and initialize a btree cursor for ialloc btree. | |
411 | */ | |
57bd3dbe BF |
412 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
413 | XFS_BTNUM_INO); | |
1da177e4 LT |
414 | if (agino > 0) { |
415 | /* | |
f3d1e587 JL |
416 | * In the middle of an allocation group, we need to get |
417 | * the remainder of the chunk we're in. | |
1da177e4 | 418 | */ |
f3d1e587 JL |
419 | struct xfs_inobt_rec_incore r; |
420 | ||
421 | error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r); | |
422 | if (error) | |
a6bbce54 | 423 | goto del_cursor; |
f3d1e587 | 424 | if (icount) { |
2e287a73 | 425 | irbp->ir_startino = r.ir_startino; |
12d0714d BF |
426 | irbp->ir_holemask = r.ir_holemask; |
427 | irbp->ir_count = r.ir_count; | |
2e287a73 CH |
428 | irbp->ir_freecount = r.ir_freecount; |
429 | irbp->ir_free = r.ir_free; | |
1da177e4 | 430 | irbp++; |
1da177e4 | 431 | } |
f3d1e587 | 432 | /* Increment to the next record */ |
afa947cb | 433 | error = xfs_btree_increment(cur, 0, &stat); |
1da177e4 | 434 | } else { |
f3d1e587 | 435 | /* Start of ag. Lookup the first inode chunk */ |
afa947cb | 436 | error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat); |
1da177e4 | 437 | } |
afa947cb | 438 | if (error || stat == 0) { |
6e57c542 | 439 | end_of_ag = true; |
a6bbce54 | 440 | goto del_cursor; |
afa947cb | 441 | } |
d4c27348 | 442 | |
1da177e4 LT |
443 | /* |
444 | * Loop through inode btree records in this ag, | |
445 | * until we run out of inodes or space in the buffer. | |
446 | */ | |
447 | while (irbp < irbufend && icount < ubcount) { | |
d4c27348 | 448 | struct xfs_inobt_rec_incore r; |
2e287a73 | 449 | |
afa947cb DC |
450 | error = xfs_inobt_get_rec(cur, &r, &stat); |
451 | if (error || stat == 0) { | |
6e57c542 | 452 | end_of_ag = true; |
a6bbce54 | 453 | goto del_cursor; |
1da177e4 | 454 | } |
2e287a73 | 455 | |
1da177e4 LT |
456 | /* |
457 | * If this chunk has any allocated inodes, save it. | |
26275093 | 458 | * Also start read-ahead now for this chunk. |
1da177e4 | 459 | */ |
12d0714d | 460 | if (r.ir_freecount < r.ir_count) { |
4b8fdfec | 461 | xfs_bulkstat_ichunk_ra(mp, agno, &r); |
2e287a73 | 462 | irbp->ir_startino = r.ir_startino; |
12d0714d BF |
463 | irbp->ir_holemask = r.ir_holemask; |
464 | irbp->ir_count = r.ir_count; | |
2e287a73 CH |
465 | irbp->ir_freecount = r.ir_freecount; |
466 | irbp->ir_free = r.ir_free; | |
1da177e4 | 467 | irbp++; |
12d0714d | 468 | icount += r.ir_count - r.ir_freecount; |
1da177e4 | 469 | } |
afa947cb DC |
470 | error = xfs_btree_increment(cur, 0, &stat); |
471 | if (error || stat == 0) { | |
6e57c542 | 472 | end_of_ag = true; |
7a19dee1 JK |
473 | goto del_cursor; |
474 | } | |
cd57e594 | 475 | cond_resched(); |
1da177e4 | 476 | } |
a6bbce54 | 477 | |
1da177e4 | 478 | /* |
a6bbce54 DC |
479 | * Drop the btree buffers and the agi buffer as we can't hold any |
480 | * of the locks these represent when calling iget. If there is a | |
481 | * pending error, then we are done. | |
1da177e4 | 482 | */ |
a6bbce54 | 483 | del_cursor: |
f307080a BF |
484 | xfs_btree_del_cursor(cur, error ? |
485 | XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
1da177e4 | 486 | xfs_buf_relse(agbp); |
a6bbce54 DC |
487 | if (error) |
488 | break; | |
1da177e4 | 489 | /* |
00275899 DC |
490 | * Now format all the good inodes into the user's buffer. The |
491 | * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer | |
492 | * for the next loop iteration. | |
1da177e4 LT |
493 | */ |
494 | irbufend = irbp; | |
495 | for (irbp = irbuf; | |
6e57c542 | 496 | irbp < irbufend && ac.ac_ubleft >= statstruct_size; |
bf4a5af2 | 497 | irbp++) { |
1e773c49 | 498 | error = xfs_bulkstat_ag_ichunk(mp, agno, irbp, |
bf4a5af2 | 499 | formatter, statstruct_size, &ac, |
00275899 | 500 | &agino); |
1e773c49 | 501 | if (error) |
febe3cbe | 502 | break; |
1e773c49 | 503 | |
cd57e594 | 504 | cond_resched(); |
1da177e4 | 505 | } |
bf4a5af2 | 506 | |
febe3cbe DC |
507 | /* |
508 | * If we've run out of space or had a formatting error, we | |
509 | * are now done | |
510 | */ | |
511 | if (ac.ac_ubleft < statstruct_size || error) | |
1da177e4 | 512 | break; |
6e57c542 DC |
513 | |
514 | if (end_of_ag) { | |
515 | agno++; | |
516 | agino = 0; | |
00275899 | 517 | } |
1da177e4 LT |
518 | } |
519 | /* | |
520 | * Done, we're either out of filesystem or space to put the data. | |
521 | */ | |
fdd3ccee | 522 | kmem_free(irbuf); |
bf4a5af2 | 523 | *ubcountp = ac.ac_ubelem; |
febe3cbe | 524 | |
cd57e594 | 525 | /* |
febe3cbe DC |
526 | * We found some inodes, so clear the error status and return them. |
527 | * The lastino pointer will point directly at the inode that triggered | |
528 | * any error that occurred, so on the next call the error will be | |
529 | * triggered again and propagated to userspace as there will be no | |
530 | * formatted inodes in the buffer. | |
cd57e594 | 531 | */ |
bf4a5af2 | 532 | if (ac.ac_ubelem) |
febe3cbe DC |
533 | error = 0; |
534 | ||
00275899 DC |
535 | /* |
536 | * If we ran out of filesystem, lastino will point off the end of | |
537 | * the filesystem so the next call will return immediately. | |
538 | */ | |
539 | *lastinop = XFS_AGINO_TO_INO(mp, agno, agino); | |
540 | if (agno >= mp->m_sb.sb_agcount) | |
1da177e4 | 541 | *done = 1; |
1da177e4 | 542 | |
febe3cbe | 543 | return error; |
1da177e4 LT |
544 | } |
545 | ||
faa63e95 MM |
546 | int |
547 | xfs_inumbers_fmt( | |
548 | void __user *ubuffer, /* buffer to write to */ | |
549fa006 | 549 | const struct xfs_inogrp *buffer, /* buffer to read from */ |
faa63e95 MM |
550 | long count, /* # of elements to read */ |
551 | long *written) /* # of bytes written */ | |
552 | { | |
553 | if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer))) | |
554 | return -EFAULT; | |
555 | *written = count * sizeof(*buffer); | |
556 | return 0; | |
557 | } | |
558 | ||
1da177e4 LT |
559 | /* |
560 | * Return inode number table for the filesystem. | |
561 | */ | |
562 | int /* error status */ | |
563 | xfs_inumbers( | |
549fa006 JL |
564 | struct xfs_mount *mp,/* mount point for filesystem */ |
565 | xfs_ino_t *lastino,/* last inode returned */ | |
566 | int *count,/* size of buffer/count returned */ | |
567 | void __user *ubuffer,/* buffer with inode descriptions */ | |
568 | inumbers_fmt_pf formatter) | |
1da177e4 | 569 | { |
549fa006 JL |
570 | xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino); |
571 | xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino); | |
572 | struct xfs_btree_cur *cur = NULL; | |
c7cb51dc | 573 | struct xfs_buf *agbp = NULL; |
549fa006 JL |
574 | struct xfs_inogrp *buffer; |
575 | int bcount; | |
576 | int left = *count; | |
577 | int bufidx = 0; | |
578 | int error = 0; | |
579 | ||
1da177e4 | 580 | *count = 0; |
549fa006 JL |
581 | if (agno >= mp->m_sb.sb_agcount || |
582 | *lastino != XFS_AGINO_TO_INO(mp, agno, agino)) | |
583 | return error; | |
584 | ||
e6a4b37f | 585 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
bf9216f9 | 586 | buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP); |
c7cb51dc | 587 | do { |
549fa006 JL |
588 | struct xfs_inobt_rec_incore r; |
589 | int stat; | |
590 | ||
c7cb51dc | 591 | if (!agbp) { |
1da177e4 | 592 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
c7cb51dc JL |
593 | if (error) |
594 | break; | |
595 | ||
57bd3dbe BF |
596 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno, |
597 | XFS_BTNUM_INO); | |
21875505 | 598 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE, |
549fa006 | 599 | &stat); |
c7cb51dc JL |
600 | if (error) |
601 | break; | |
602 | if (!stat) | |
603 | goto next_ag; | |
1da177e4 | 604 | } |
c7cb51dc | 605 | |
549fa006 | 606 | error = xfs_inobt_get_rec(cur, &r, &stat); |
c7cb51dc JL |
607 | if (error) |
608 | break; | |
609 | if (!stat) | |
610 | goto next_ag; | |
611 | ||
2e287a73 CH |
612 | agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1; |
613 | buffer[bufidx].xi_startino = | |
614 | XFS_AGINO_TO_INO(mp, agno, r.ir_startino); | |
12d0714d | 615 | buffer[bufidx].xi_alloccount = r.ir_count - r.ir_freecount; |
2e287a73 | 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 | } |