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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" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
a844f451 | 26 | #include "xfs_ag.h" |
1da177e4 LT |
27 | #include "xfs_dir.h" |
28 | #include "xfs_dir2.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
34 | #include "xfs_dir_sf.h" |
35 | #include "xfs_dir2_sf.h" | |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 LT |
37 | #include "xfs_dinode.h" |
38 | #include "xfs_inode.h" | |
39 | #include "xfs_ialloc.h" | |
40 | #include "xfs_itable.h" | |
41 | #include "xfs_error.h" | |
a844f451 | 42 | #include "xfs_btree.h" |
1da177e4 LT |
43 | |
44 | #ifndef HAVE_USERACC | |
45 | #define useracc(ubuffer, size, flags, foo) (0) | |
46 | #define unuseracc(ubuffer, size, flags) | |
47 | #endif | |
48 | ||
49 | STATIC int | |
50 | xfs_bulkstat_one_iget( | |
51 | xfs_mount_t *mp, /* mount point for filesystem */ | |
52 | xfs_ino_t ino, /* inode number to get data for */ | |
53 | xfs_daddr_t bno, /* starting bno of inode cluster */ | |
54 | xfs_bstat_t *buf, /* return buffer */ | |
55 | int *stat) /* BULKSTAT_RV_... */ | |
56 | { | |
57 | xfs_dinode_core_t *dic; /* dinode core info pointer */ | |
58 | xfs_inode_t *ip; /* incore inode pointer */ | |
42fe2b1f | 59 | vnode_t *vp; |
1da177e4 LT |
60 | int error; |
61 | ||
62 | error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, bno); | |
63 | if (error) { | |
64 | *stat = BULKSTAT_RV_NOTHING; | |
65 | return error; | |
66 | } | |
67 | ||
68 | ASSERT(ip != NULL); | |
69 | ASSERT(ip->i_blkno != (xfs_daddr_t)0); | |
70 | if (ip->i_d.di_mode == 0) { | |
71 | *stat = BULKSTAT_RV_NOTHING; | |
72 | error = XFS_ERROR(ENOENT); | |
73 | goto out_iput; | |
74 | } | |
75 | ||
42fe2b1f | 76 | vp = XFS_ITOV(ip); |
1da177e4 LT |
77 | dic = &ip->i_d; |
78 | ||
79 | /* xfs_iget returns the following without needing | |
80 | * further change. | |
81 | */ | |
82 | buf->bs_nlink = dic->di_nlink; | |
83 | buf->bs_projid = dic->di_projid; | |
84 | buf->bs_ino = ino; | |
85 | buf->bs_mode = dic->di_mode; | |
86 | buf->bs_uid = dic->di_uid; | |
87 | buf->bs_gid = dic->di_gid; | |
88 | buf->bs_size = dic->di_size; | |
ca5ccbf9 | 89 | vn_atime_to_bstime(vp, &buf->bs_atime); |
1da177e4 LT |
90 | buf->bs_mtime.tv_sec = dic->di_mtime.t_sec; |
91 | buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec; | |
92 | buf->bs_ctime.tv_sec = dic->di_ctime.t_sec; | |
93 | buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec; | |
94 | buf->bs_xflags = xfs_ip2xflags(ip); | |
95 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
96 | buf->bs_extents = dic->di_nextents; | |
97 | buf->bs_gen = dic->di_gen; | |
98 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
99 | buf->bs_dmevmask = dic->di_dmevmask; | |
100 | buf->bs_dmstate = dic->di_dmstate; | |
101 | buf->bs_aextents = dic->di_anextents; | |
102 | ||
103 | switch (dic->di_format) { | |
104 | case XFS_DINODE_FMT_DEV: | |
105 | buf->bs_rdev = ip->i_df.if_u2.if_rdev; | |
106 | buf->bs_blksize = BLKDEV_IOSIZE; | |
107 | buf->bs_blocks = 0; | |
108 | break; | |
109 | case XFS_DINODE_FMT_LOCAL: | |
110 | case XFS_DINODE_FMT_UUID: | |
111 | buf->bs_rdev = 0; | |
112 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
113 | buf->bs_blocks = 0; | |
114 | break; | |
115 | case XFS_DINODE_FMT_EXTENTS: | |
116 | case XFS_DINODE_FMT_BTREE: | |
117 | buf->bs_rdev = 0; | |
118 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
119 | buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; | |
120 | break; | |
121 | } | |
122 | ||
123 | out_iput: | |
124 | xfs_iput(ip, XFS_ILOCK_SHARED); | |
125 | return error; | |
126 | } | |
127 | ||
128 | STATIC int | |
129 | xfs_bulkstat_one_dinode( | |
130 | xfs_mount_t *mp, /* mount point for filesystem */ | |
131 | xfs_ino_t ino, /* inode number to get data for */ | |
132 | xfs_dinode_t *dip, /* dinode inode pointer */ | |
133 | xfs_bstat_t *buf) /* return buffer */ | |
134 | { | |
135 | xfs_dinode_core_t *dic; /* dinode core info pointer */ | |
136 | ||
137 | dic = &dip->di_core; | |
138 | ||
139 | /* | |
140 | * The inode format changed when we moved the link count and | |
141 | * made it 32 bits long. If this is an old format inode, | |
142 | * convert it in memory to look like a new one. If it gets | |
143 | * flushed to disk we will convert back before flushing or | |
144 | * logging it. We zero out the new projid field and the old link | |
145 | * count field. We'll handle clearing the pad field (the remains | |
146 | * of the old uuid field) when we actually convert the inode to | |
147 | * the new format. We don't change the version number so that we | |
148 | * can distinguish this from a real new format inode. | |
149 | */ | |
150 | if (INT_GET(dic->di_version, ARCH_CONVERT) == XFS_DINODE_VERSION_1) { | |
151 | buf->bs_nlink = INT_GET(dic->di_onlink, ARCH_CONVERT); | |
152 | buf->bs_projid = 0; | |
153 | } else { | |
154 | buf->bs_nlink = INT_GET(dic->di_nlink, ARCH_CONVERT); | |
155 | buf->bs_projid = INT_GET(dic->di_projid, ARCH_CONVERT); | |
156 | } | |
157 | ||
158 | buf->bs_ino = ino; | |
159 | buf->bs_mode = INT_GET(dic->di_mode, ARCH_CONVERT); | |
160 | buf->bs_uid = INT_GET(dic->di_uid, ARCH_CONVERT); | |
161 | buf->bs_gid = INT_GET(dic->di_gid, ARCH_CONVERT); | |
162 | buf->bs_size = INT_GET(dic->di_size, ARCH_CONVERT); | |
163 | buf->bs_atime.tv_sec = INT_GET(dic->di_atime.t_sec, ARCH_CONVERT); | |
164 | buf->bs_atime.tv_nsec = INT_GET(dic->di_atime.t_nsec, ARCH_CONVERT); | |
165 | buf->bs_mtime.tv_sec = INT_GET(dic->di_mtime.t_sec, ARCH_CONVERT); | |
166 | buf->bs_mtime.tv_nsec = INT_GET(dic->di_mtime.t_nsec, ARCH_CONVERT); | |
167 | buf->bs_ctime.tv_sec = INT_GET(dic->di_ctime.t_sec, ARCH_CONVERT); | |
168 | buf->bs_ctime.tv_nsec = INT_GET(dic->di_ctime.t_nsec, ARCH_CONVERT); | |
169 | buf->bs_xflags = xfs_dic2xflags(dic); | |
170 | buf->bs_extsize = INT_GET(dic->di_extsize, ARCH_CONVERT) << mp->m_sb.sb_blocklog; | |
171 | buf->bs_extents = INT_GET(dic->di_nextents, ARCH_CONVERT); | |
172 | buf->bs_gen = INT_GET(dic->di_gen, ARCH_CONVERT); | |
173 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
174 | buf->bs_dmevmask = INT_GET(dic->di_dmevmask, ARCH_CONVERT); | |
175 | buf->bs_dmstate = INT_GET(dic->di_dmstate, ARCH_CONVERT); | |
176 | buf->bs_aextents = INT_GET(dic->di_anextents, ARCH_CONVERT); | |
177 | ||
178 | switch (INT_GET(dic->di_format, ARCH_CONVERT)) { | |
179 | case XFS_DINODE_FMT_DEV: | |
180 | buf->bs_rdev = INT_GET(dip->di_u.di_dev, ARCH_CONVERT); | |
181 | buf->bs_blksize = BLKDEV_IOSIZE; | |
182 | buf->bs_blocks = 0; | |
183 | break; | |
184 | case XFS_DINODE_FMT_LOCAL: | |
185 | case XFS_DINODE_FMT_UUID: | |
186 | buf->bs_rdev = 0; | |
187 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
188 | buf->bs_blocks = 0; | |
189 | break; | |
190 | case XFS_DINODE_FMT_EXTENTS: | |
191 | case XFS_DINODE_FMT_BTREE: | |
192 | buf->bs_rdev = 0; | |
193 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
194 | buf->bs_blocks = INT_GET(dic->di_nblocks, ARCH_CONVERT); | |
195 | break; | |
196 | } | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Return stat information for one inode. | |
203 | * Return 0 if ok, else errno. | |
204 | */ | |
205 | int /* error status */ | |
206 | xfs_bulkstat_one( | |
207 | xfs_mount_t *mp, /* mount point for filesystem */ | |
208 | xfs_ino_t ino, /* inode number to get data for */ | |
209 | void __user *buffer, /* buffer to place output in */ | |
210 | int ubsize, /* size of buffer */ | |
211 | void *private_data, /* my private data */ | |
212 | xfs_daddr_t bno, /* starting bno of inode cluster */ | |
213 | int *ubused, /* bytes used by me */ | |
214 | void *dibuff, /* on-disk inode buffer */ | |
215 | int *stat) /* BULKSTAT_RV_... */ | |
216 | { | |
217 | xfs_bstat_t *buf; /* return buffer */ | |
218 | int error = 0; /* error value */ | |
219 | xfs_dinode_t *dip; /* dinode inode pointer */ | |
220 | ||
221 | dip = (xfs_dinode_t *)dibuff; | |
222 | ||
223 | if (!buffer || ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino || | |
224 | (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) && | |
225 | (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))) { | |
226 | *stat = BULKSTAT_RV_NOTHING; | |
227 | return XFS_ERROR(EINVAL); | |
228 | } | |
229 | if (ubsize < sizeof(*buf)) { | |
230 | *stat = BULKSTAT_RV_NOTHING; | |
231 | return XFS_ERROR(ENOMEM); | |
232 | } | |
233 | ||
234 | buf = kmem_alloc(sizeof(*buf), KM_SLEEP); | |
235 | ||
236 | if (dip == NULL) { | |
237 | /* We're not being passed a pointer to a dinode. This happens | |
238 | * if BULKSTAT_FG_IGET is selected. Do the iget. | |
239 | */ | |
240 | error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat); | |
241 | if (error) | |
242 | goto out_free; | |
243 | } else { | |
244 | xfs_bulkstat_one_dinode(mp, ino, dip, buf); | |
245 | } | |
246 | ||
247 | if (copy_to_user(buffer, buf, sizeof(*buf))) { | |
248 | *stat = BULKSTAT_RV_NOTHING; | |
249 | error = EFAULT; | |
250 | goto out_free; | |
251 | } | |
252 | ||
253 | *stat = BULKSTAT_RV_DIDONE; | |
254 | if (ubused) | |
255 | *ubused = sizeof(*buf); | |
256 | ||
257 | out_free: | |
258 | kmem_free(buf, sizeof(*buf)); | |
259 | return error; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Return stat information in bulk (by-inode) for the filesystem. | |
264 | */ | |
265 | int /* error status */ | |
266 | xfs_bulkstat( | |
267 | xfs_mount_t *mp, /* mount point for filesystem */ | |
268 | xfs_ino_t *lastinop, /* last inode returned */ | |
269 | int *ubcountp, /* size of buffer/count returned */ | |
270 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
271 | void *private_data,/* private data for formatter */ | |
272 | size_t statstruct_size, /* sizeof struct filling */ | |
273 | char __user *ubuffer, /* buffer with inode stats */ | |
274 | int flags, /* defined in xfs_itable.h */ | |
275 | int *done) /* 1 if there're more stats to get */ | |
276 | { | |
277 | xfs_agblock_t agbno=0;/* allocation group block number */ | |
278 | xfs_buf_t *agbp; /* agi header buffer */ | |
279 | xfs_agi_t *agi; /* agi header data */ | |
280 | xfs_agino_t agino; /* inode # in allocation group */ | |
281 | xfs_agnumber_t agno; /* allocation group number */ | |
282 | xfs_daddr_t bno; /* inode cluster start daddr */ | |
283 | int chunkidx; /* current index into inode chunk */ | |
284 | int clustidx; /* current index into inode cluster */ | |
285 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ | |
286 | int end_of_ag; /* set if we've seen the ag end */ | |
287 | int error; /* error code */ | |
288 | int fmterror;/* bulkstat formatter result */ | |
289 | __int32_t gcnt; /* current btree rec's count */ | |
290 | xfs_inofree_t gfree; /* current btree rec's free mask */ | |
291 | xfs_agino_t gino; /* current btree rec's start inode */ | |
292 | int i; /* loop index */ | |
293 | int icount; /* count of inodes good in irbuf */ | |
294 | xfs_ino_t ino; /* inode number (filesystem) */ | |
295 | xfs_inobt_rec_t *irbp; /* current irec buffer pointer */ | |
296 | xfs_inobt_rec_t *irbuf; /* start of irec buffer */ | |
297 | xfs_inobt_rec_t *irbufend; /* end of good irec buffer entries */ | |
298 | xfs_ino_t lastino=0; /* last inode number returned */ | |
299 | int nbcluster; /* # of blocks in a cluster */ | |
300 | int nicluster; /* # of inodes in a cluster */ | |
301 | int nimask; /* mask for inode clusters */ | |
302 | int nirbuf; /* size of irbuf */ | |
303 | int rval; /* return value error code */ | |
304 | int tmp; /* result value from btree calls */ | |
305 | int ubcount; /* size of user's buffer */ | |
306 | int ubleft; /* bytes left in user's buffer */ | |
307 | char __user *ubufp; /* pointer into user's buffer */ | |
308 | int ubelem; /* spaces used in user's buffer */ | |
309 | int ubused; /* bytes used by formatter */ | |
310 | xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */ | |
311 | xfs_dinode_t *dip; /* ptr into bp for specific inode */ | |
312 | xfs_inode_t *ip; /* ptr to in-core inode struct */ | |
313 | ||
314 | /* | |
315 | * Get the last inode value, see if there's nothing to do. | |
316 | */ | |
317 | ino = (xfs_ino_t)*lastinop; | |
318 | dip = NULL; | |
319 | agno = XFS_INO_TO_AGNO(mp, ino); | |
320 | agino = XFS_INO_TO_AGINO(mp, ino); | |
321 | if (agno >= mp->m_sb.sb_agcount || | |
322 | ino != XFS_AGINO_TO_INO(mp, agno, agino)) { | |
323 | *done = 1; | |
324 | *ubcountp = 0; | |
325 | return 0; | |
326 | } | |
327 | ubcount = *ubcountp; /* statstruct's */ | |
328 | ubleft = ubcount * statstruct_size; /* bytes */ | |
329 | *ubcountp = ubelem = 0; | |
330 | *done = 0; | |
331 | fmterror = 0; | |
332 | ubufp = ubuffer; | |
333 | nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ? | |
334 | mp->m_sb.sb_inopblock : | |
335 | (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog); | |
336 | nimask = ~(nicluster - 1); | |
337 | nbcluster = nicluster >> mp->m_sb.sb_inopblog; | |
338 | /* | |
339 | * Lock down the user's buffer. If a buffer was not sent, as in the case | |
340 | * disk quota code calls here, we skip this. | |
341 | */ | |
342 | if (ubuffer && | |
343 | (error = useracc(ubuffer, ubcount * statstruct_size, | |
344 | (B_READ|B_PHYS), NULL))) { | |
345 | return error; | |
346 | } | |
347 | /* | |
348 | * Allocate a page-sized buffer for inode btree records. | |
349 | * We could try allocating something smaller, but for normal | |
350 | * calls we'll always (potentially) need the whole page. | |
351 | */ | |
352 | irbuf = kmem_alloc(NBPC, KM_SLEEP); | |
353 | nirbuf = NBPC / sizeof(*irbuf); | |
354 | /* | |
355 | * Loop over the allocation groups, starting from the last | |
356 | * inode returned; 0 means start of the allocation group. | |
357 | */ | |
358 | rval = 0; | |
359 | while (ubleft >= statstruct_size && agno < mp->m_sb.sb_agcount) { | |
360 | bp = NULL; | |
361 | down_read(&mp->m_peraglock); | |
362 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); | |
363 | up_read(&mp->m_peraglock); | |
364 | if (error) { | |
365 | /* | |
366 | * Skip this allocation group and go to the next one. | |
367 | */ | |
368 | agno++; | |
369 | agino = 0; | |
370 | continue; | |
371 | } | |
372 | agi = XFS_BUF_TO_AGI(agbp); | |
373 | /* | |
374 | * Allocate and initialize a btree cursor for ialloc btree. | |
375 | */ | |
376 | cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO, | |
377 | (xfs_inode_t *)0, 0); | |
378 | irbp = irbuf; | |
379 | irbufend = irbuf + nirbuf; | |
380 | end_of_ag = 0; | |
381 | /* | |
382 | * If we're returning in the middle of an allocation group, | |
383 | * we need to get the remainder of the chunk we're in. | |
384 | */ | |
385 | if (agino > 0) { | |
386 | /* | |
387 | * Lookup the inode chunk that this inode lives in. | |
388 | */ | |
389 | error = xfs_inobt_lookup_le(cur, agino, 0, 0, &tmp); | |
390 | if (!error && /* no I/O error */ | |
391 | tmp && /* lookup succeeded */ | |
392 | /* got the record, should always work */ | |
393 | !(error = xfs_inobt_get_rec(cur, &gino, &gcnt, | |
394 | &gfree, &i)) && | |
395 | i == 1 && | |
396 | /* this is the right chunk */ | |
397 | agino < gino + XFS_INODES_PER_CHUNK && | |
398 | /* lastino was not last in chunk */ | |
399 | (chunkidx = agino - gino + 1) < | |
400 | XFS_INODES_PER_CHUNK && | |
401 | /* there are some left allocated */ | |
402 | XFS_INOBT_MASKN(chunkidx, | |
403 | XFS_INODES_PER_CHUNK - chunkidx) & ~gfree) { | |
404 | /* | |
405 | * Grab the chunk record. Mark all the | |
406 | * uninteresting inodes (because they're | |
407 | * before our start point) free. | |
408 | */ | |
409 | for (i = 0; i < chunkidx; i++) { | |
410 | if (XFS_INOBT_MASK(i) & ~gfree) | |
411 | gcnt++; | |
412 | } | |
413 | gfree |= XFS_INOBT_MASKN(0, chunkidx); | |
414 | INT_SET(irbp->ir_startino, ARCH_CONVERT, gino); | |
415 | INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt); | |
416 | INT_SET(irbp->ir_free, ARCH_CONVERT, gfree); | |
417 | irbp++; | |
418 | agino = gino + XFS_INODES_PER_CHUNK; | |
419 | icount = XFS_INODES_PER_CHUNK - gcnt; | |
420 | } else { | |
421 | /* | |
422 | * If any of those tests failed, bump the | |
423 | * inode number (just in case). | |
424 | */ | |
425 | agino++; | |
426 | icount = 0; | |
427 | } | |
428 | /* | |
429 | * In any case, increment to the next record. | |
430 | */ | |
431 | if (!error) | |
432 | error = xfs_inobt_increment(cur, 0, &tmp); | |
433 | } else { | |
434 | /* | |
435 | * Start of ag. Lookup the first inode chunk. | |
436 | */ | |
437 | error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &tmp); | |
438 | icount = 0; | |
439 | } | |
440 | /* | |
441 | * Loop through inode btree records in this ag, | |
442 | * until we run out of inodes or space in the buffer. | |
443 | */ | |
444 | while (irbp < irbufend && icount < ubcount) { | |
445 | /* | |
446 | * Loop as long as we're unable to read the | |
447 | * inode btree. | |
448 | */ | |
449 | while (error) { | |
450 | agino += XFS_INODES_PER_CHUNK; | |
451 | if (XFS_AGINO_TO_AGBNO(mp, agino) >= | |
16259e7d | 452 | be32_to_cpu(agi->agi_length)) |
1da177e4 LT |
453 | break; |
454 | error = xfs_inobt_lookup_ge(cur, agino, 0, 0, | |
455 | &tmp); | |
456 | } | |
457 | /* | |
458 | * If ran off the end of the ag either with an error, | |
459 | * or the normal way, set end and stop collecting. | |
460 | */ | |
461 | if (error || | |
462 | (error = xfs_inobt_get_rec(cur, &gino, &gcnt, | |
463 | &gfree, &i)) || | |
464 | i == 0) { | |
465 | end_of_ag = 1; | |
466 | break; | |
467 | } | |
468 | /* | |
469 | * If this chunk has any allocated inodes, save it. | |
470 | */ | |
471 | if (gcnt < XFS_INODES_PER_CHUNK) { | |
472 | INT_SET(irbp->ir_startino, ARCH_CONVERT, gino); | |
473 | INT_SET(irbp->ir_freecount, ARCH_CONVERT, gcnt); | |
474 | INT_SET(irbp->ir_free, ARCH_CONVERT, gfree); | |
475 | irbp++; | |
476 | icount += XFS_INODES_PER_CHUNK - gcnt; | |
477 | } | |
478 | /* | |
479 | * Set agino to after this chunk and bump the cursor. | |
480 | */ | |
481 | agino = gino + XFS_INODES_PER_CHUNK; | |
482 | error = xfs_inobt_increment(cur, 0, &tmp); | |
483 | } | |
484 | /* | |
485 | * Drop the btree buffers and the agi buffer. | |
486 | * We can't hold any of the locks these represent | |
487 | * when calling iget. | |
488 | */ | |
489 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
490 | xfs_buf_relse(agbp); | |
491 | /* | |
492 | * Now format all the good inodes into the user's buffer. | |
493 | */ | |
494 | irbufend = irbp; | |
495 | for (irbp = irbuf; | |
496 | irbp < irbufend && ubleft >= statstruct_size; irbp++) { | |
497 | /* | |
498 | * Read-ahead the next chunk's worth of inodes. | |
499 | */ | |
500 | if (&irbp[1] < irbufend) { | |
501 | /* | |
502 | * Loop over all clusters in the next chunk. | |
503 | * Do a readahead if there are any allocated | |
504 | * inodes in that cluster. | |
505 | */ | |
506 | for (agbno = XFS_AGINO_TO_AGBNO(mp, | |
507 | INT_GET(irbp[1].ir_startino, ARCH_CONVERT)), | |
508 | chunkidx = 0; | |
509 | chunkidx < XFS_INODES_PER_CHUNK; | |
510 | chunkidx += nicluster, | |
511 | agbno += nbcluster) { | |
512 | if (XFS_INOBT_MASKN(chunkidx, | |
513 | nicluster) & | |
514 | ~(INT_GET(irbp[1].ir_free, ARCH_CONVERT))) | |
515 | xfs_btree_reada_bufs(mp, agno, | |
516 | agbno, nbcluster); | |
517 | } | |
518 | } | |
519 | /* | |
520 | * Now process this chunk of inodes. | |
521 | */ | |
522 | for (agino = INT_GET(irbp->ir_startino, ARCH_CONVERT), chunkidx = 0, clustidx = 0; | |
523 | ubleft > 0 && | |
524 | INT_GET(irbp->ir_freecount, ARCH_CONVERT) < XFS_INODES_PER_CHUNK; | |
525 | chunkidx++, clustidx++, agino++) { | |
526 | ASSERT(chunkidx < XFS_INODES_PER_CHUNK); | |
527 | /* | |
528 | * Recompute agbno if this is the | |
529 | * first inode of the cluster. | |
530 | * | |
531 | * Careful with clustidx. There can be | |
532 | * multple clusters per chunk, a single | |
533 | * cluster per chunk or a cluster that has | |
534 | * inodes represented from several different | |
535 | * chunks (if blocksize is large). | |
536 | * | |
537 | * Because of this, the starting clustidx is | |
538 | * initialized to zero in this loop but must | |
539 | * later be reset after reading in the cluster | |
540 | * buffer. | |
541 | */ | |
542 | if ((chunkidx & (nicluster - 1)) == 0) { | |
543 | agbno = XFS_AGINO_TO_AGBNO(mp, | |
544 | INT_GET(irbp->ir_startino, ARCH_CONVERT)) + | |
545 | ((chunkidx & nimask) >> | |
546 | mp->m_sb.sb_inopblog); | |
547 | ||
548 | if (flags & BULKSTAT_FG_QUICK) { | |
549 | ino = XFS_AGINO_TO_INO(mp, agno, | |
550 | agino); | |
551 | bno = XFS_AGB_TO_DADDR(mp, agno, | |
552 | agbno); | |
553 | ||
554 | /* | |
555 | * Get the inode cluster buffer | |
556 | */ | |
557 | ASSERT(xfs_inode_zone != NULL); | |
558 | ip = kmem_zone_zalloc(xfs_inode_zone, | |
559 | KM_SLEEP); | |
560 | ip->i_ino = ino; | |
561 | ip->i_mount = mp; | |
562 | if (bp) | |
563 | xfs_buf_relse(bp); | |
564 | error = xfs_itobp(mp, NULL, ip, | |
b12dd342 NS |
565 | &dip, &bp, bno, |
566 | XFS_IMAP_BULKSTAT); | |
1da177e4 LT |
567 | if (!error) |
568 | clustidx = ip->i_boffset / mp->m_sb.sb_inodesize; | |
569 | kmem_zone_free(xfs_inode_zone, ip); | |
570 | if (XFS_TEST_ERROR(error != 0, | |
571 | mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK, | |
572 | XFS_RANDOM_BULKSTAT_READ_CHUNK)) { | |
573 | bp = NULL; | |
b12dd342 NS |
574 | ubleft = 0; |
575 | rval = error; | |
1da177e4 LT |
576 | break; |
577 | } | |
578 | } | |
579 | } | |
580 | /* | |
581 | * Skip if this inode is free. | |
582 | */ | |
583 | if (XFS_INOBT_MASK(chunkidx) & INT_GET(irbp->ir_free, ARCH_CONVERT)) | |
584 | continue; | |
585 | /* | |
586 | * Count used inodes as free so we can tell | |
587 | * when the chunk is used up. | |
588 | */ | |
589 | INT_MOD(irbp->ir_freecount, ARCH_CONVERT, +1); | |
590 | ino = XFS_AGINO_TO_INO(mp, agno, agino); | |
591 | bno = XFS_AGB_TO_DADDR(mp, agno, agbno); | |
592 | if (flags & BULKSTAT_FG_QUICK) { | |
593 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, | |
594 | (clustidx << mp->m_sb.sb_inodelog)); | |
595 | ||
596 | if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT) | |
597 | != XFS_DINODE_MAGIC | |
598 | || !XFS_DINODE_GOOD_VERSION( | |
599 | INT_GET(dip->di_core.di_version, ARCH_CONVERT))) | |
600 | continue; | |
601 | } | |
602 | ||
603 | /* | |
604 | * Get the inode and fill in a single buffer. | |
605 | * BULKSTAT_FG_QUICK uses dip to fill it in. | |
606 | * BULKSTAT_FG_IGET uses igets. | |
607 | * See: xfs_bulkstat_one & xfs_dm_bulkstat_one. | |
608 | * This is also used to count inodes/blks, etc | |
609 | * in xfs_qm_quotacheck. | |
610 | */ | |
611 | ubused = statstruct_size; | |
612 | error = formatter(mp, ino, ubufp, | |
613 | ubleft, private_data, | |
614 | bno, &ubused, dip, &fmterror); | |
615 | if (fmterror == BULKSTAT_RV_NOTHING) { | |
616 | if (error == ENOMEM) | |
617 | ubleft = 0; | |
618 | continue; | |
619 | } | |
620 | if (fmterror == BULKSTAT_RV_GIVEUP) { | |
621 | ubleft = 0; | |
622 | ASSERT(error); | |
623 | rval = error; | |
624 | break; | |
625 | } | |
626 | if (ubufp) | |
627 | ubufp += ubused; | |
628 | ubleft -= ubused; | |
629 | ubelem++; | |
630 | lastino = ino; | |
631 | } | |
632 | } | |
633 | ||
634 | if (bp) | |
635 | xfs_buf_relse(bp); | |
636 | ||
637 | /* | |
638 | * Set up for the next loop iteration. | |
639 | */ | |
640 | if (ubleft > 0) { | |
641 | if (end_of_ag) { | |
642 | agno++; | |
643 | agino = 0; | |
644 | } else | |
645 | agino = XFS_INO_TO_AGINO(mp, lastino); | |
646 | } else | |
647 | break; | |
648 | } | |
649 | /* | |
650 | * Done, we're either out of filesystem or space to put the data. | |
651 | */ | |
652 | kmem_free(irbuf, NBPC); | |
653 | if (ubuffer) | |
654 | unuseracc(ubuffer, ubcount * statstruct_size, (B_READ|B_PHYS)); | |
655 | *ubcountp = ubelem; | |
656 | if (agno >= mp->m_sb.sb_agcount) { | |
657 | /* | |
658 | * If we ran out of filesystem, mark lastino as off | |
659 | * the end of the filesystem, so the next call | |
660 | * will return immediately. | |
661 | */ | |
662 | *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0); | |
663 | *done = 1; | |
664 | } else | |
665 | *lastinop = (xfs_ino_t)lastino; | |
666 | ||
667 | return rval; | |
668 | } | |
669 | ||
670 | /* | |
671 | * Return stat information in bulk (by-inode) for the filesystem. | |
672 | * Special case for non-sequential one inode bulkstat. | |
673 | */ | |
674 | int /* error status */ | |
675 | xfs_bulkstat_single( | |
676 | xfs_mount_t *mp, /* mount point for filesystem */ | |
677 | xfs_ino_t *lastinop, /* inode to return */ | |
678 | char __user *buffer, /* buffer with inode stats */ | |
679 | int *done) /* 1 if there're more stats to get */ | |
680 | { | |
681 | int count; /* count value for bulkstat call */ | |
682 | int error; /* return value */ | |
683 | xfs_ino_t ino; /* filesystem inode number */ | |
684 | int res; /* result from bs1 */ | |
685 | ||
686 | /* | |
687 | * note that requesting valid inode numbers which are not allocated | |
688 | * to inodes will most likely cause xfs_itobp to generate warning | |
689 | * messages about bad magic numbers. This is ok. The fact that | |
690 | * the inode isn't actually an inode is handled by the | |
691 | * error check below. Done this way to make the usual case faster | |
692 | * at the expense of the error case. | |
693 | */ | |
694 | ||
695 | ino = (xfs_ino_t)*lastinop; | |
696 | error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), | |
697 | NULL, 0, NULL, NULL, &res); | |
698 | if (error) { | |
699 | /* | |
700 | * Special case way failed, do it the "long" way | |
701 | * to see if that works. | |
702 | */ | |
703 | (*lastinop)--; | |
704 | count = 1; | |
705 | if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one, | |
706 | NULL, sizeof(xfs_bstat_t), buffer, | |
707 | BULKSTAT_FG_IGET, done)) | |
708 | return error; | |
709 | if (count == 0 || (xfs_ino_t)*lastinop != ino) | |
710 | return error == EFSCORRUPTED ? | |
711 | XFS_ERROR(EINVAL) : error; | |
712 | else | |
713 | return 0; | |
714 | } | |
715 | *done = 0; | |
716 | return 0; | |
717 | } | |
718 | ||
719 | /* | |
720 | * Return inode number table for the filesystem. | |
721 | */ | |
722 | int /* error status */ | |
723 | xfs_inumbers( | |
724 | xfs_mount_t *mp, /* mount point for filesystem */ | |
725 | xfs_ino_t *lastino, /* last inode returned */ | |
726 | int *count, /* size of buffer/count returned */ | |
727 | xfs_inogrp_t __user *ubuffer)/* buffer with inode descriptions */ | |
728 | { | |
729 | xfs_buf_t *agbp; | |
730 | xfs_agino_t agino; | |
731 | xfs_agnumber_t agno; | |
732 | int bcount; | |
733 | xfs_inogrp_t *buffer; | |
734 | int bufidx; | |
735 | xfs_btree_cur_t *cur; | |
736 | int error; | |
737 | __int32_t gcnt; | |
738 | xfs_inofree_t gfree; | |
739 | xfs_agino_t gino; | |
740 | int i; | |
741 | xfs_ino_t ino; | |
742 | int left; | |
743 | int tmp; | |
744 | ||
745 | ino = (xfs_ino_t)*lastino; | |
746 | agno = XFS_INO_TO_AGNO(mp, ino); | |
747 | agino = XFS_INO_TO_AGINO(mp, ino); | |
748 | left = *count; | |
749 | *count = 0; | |
750 | bcount = MIN(left, (int)(NBPP / sizeof(*buffer))); | |
751 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); | |
752 | error = bufidx = 0; | |
753 | cur = NULL; | |
754 | agbp = NULL; | |
755 | while (left > 0 && agno < mp->m_sb.sb_agcount) { | |
756 | if (agbp == NULL) { | |
757 | down_read(&mp->m_peraglock); | |
758 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); | |
759 | up_read(&mp->m_peraglock); | |
760 | if (error) { | |
761 | /* | |
762 | * If we can't read the AGI of this ag, | |
763 | * then just skip to the next one. | |
764 | */ | |
765 | ASSERT(cur == NULL); | |
766 | agbp = NULL; | |
767 | agno++; | |
768 | agino = 0; | |
769 | continue; | |
770 | } | |
771 | cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, | |
772 | XFS_BTNUM_INO, (xfs_inode_t *)0, 0); | |
773 | error = xfs_inobt_lookup_ge(cur, agino, 0, 0, &tmp); | |
774 | if (error) { | |
775 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
776 | cur = NULL; | |
777 | xfs_buf_relse(agbp); | |
778 | agbp = NULL; | |
779 | /* | |
780 | * Move up the the last inode in the current | |
781 | * chunk. The lookup_ge will always get | |
782 | * us the first inode in the next chunk. | |
783 | */ | |
784 | agino += XFS_INODES_PER_CHUNK - 1; | |
785 | continue; | |
786 | } | |
787 | } | |
788 | if ((error = xfs_inobt_get_rec(cur, &gino, &gcnt, &gfree, | |
789 | &i)) || | |
790 | i == 0) { | |
791 | xfs_buf_relse(agbp); | |
792 | agbp = NULL; | |
793 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
794 | cur = NULL; | |
795 | agno++; | |
796 | agino = 0; | |
797 | continue; | |
798 | } | |
799 | agino = gino + XFS_INODES_PER_CHUNK - 1; | |
800 | buffer[bufidx].xi_startino = XFS_AGINO_TO_INO(mp, agno, gino); | |
801 | buffer[bufidx].xi_alloccount = XFS_INODES_PER_CHUNK - gcnt; | |
802 | buffer[bufidx].xi_allocmask = ~gfree; | |
803 | bufidx++; | |
804 | left--; | |
805 | if (bufidx == bcount) { | |
806 | if (copy_to_user(ubuffer, buffer, | |
807 | bufidx * sizeof(*buffer))) { | |
808 | error = XFS_ERROR(EFAULT); | |
809 | break; | |
810 | } | |
811 | ubuffer += bufidx; | |
812 | *count += bufidx; | |
813 | bufidx = 0; | |
814 | } | |
815 | if (left) { | |
816 | error = xfs_inobt_increment(cur, 0, &tmp); | |
817 | if (error) { | |
818 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
819 | cur = NULL; | |
820 | xfs_buf_relse(agbp); | |
821 | agbp = NULL; | |
822 | /* | |
823 | * The agino value has already been bumped. | |
824 | * Just try to skip up to it. | |
825 | */ | |
826 | agino += XFS_INODES_PER_CHUNK; | |
827 | continue; | |
828 | } | |
829 | } | |
830 | } | |
831 | if (!error) { | |
832 | if (bufidx) { | |
833 | if (copy_to_user(ubuffer, buffer, | |
834 | bufidx * sizeof(*buffer))) | |
835 | error = XFS_ERROR(EFAULT); | |
836 | else | |
837 | *count += bufidx; | |
838 | } | |
839 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); | |
840 | } | |
841 | kmem_free(buffer, bcount * sizeof(*buffer)); | |
842 | if (cur) | |
843 | xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : | |
844 | XFS_BTREE_NOERROR)); | |
845 | if (agbp) | |
846 | xfs_buf_relse(agbp); | |
847 | return error; | |
848 | } |