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" |
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_dir2.h" |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
1da177e4 | 33 | #include "xfs_dir2_sf.h" |
a844f451 | 34 | #include "xfs_attr_sf.h" |
1da177e4 LT |
35 | #include "xfs_dinode.h" |
36 | #include "xfs_inode.h" | |
37 | #include "xfs_ialloc.h" | |
38 | #include "xfs_itable.h" | |
39 | #include "xfs_error.h" | |
a844f451 | 40 | #include "xfs_btree.h" |
1da177e4 | 41 | |
d96f8f89 | 42 | STATIC int |
6f1f2168 VA |
43 | xfs_internal_inum( |
44 | xfs_mount_t *mp, | |
45 | xfs_ino_t ino) | |
46 | { | |
47 | return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino || | |
62118709 | 48 | (xfs_sb_version_hasquota(&mp->m_sb) && |
6f1f2168 VA |
49 | (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino))); |
50 | } | |
51 | ||
1da177e4 LT |
52 | STATIC int |
53 | xfs_bulkstat_one_iget( | |
54 | xfs_mount_t *mp, /* mount point for filesystem */ | |
55 | xfs_ino_t ino, /* inode number to get data for */ | |
56 | xfs_daddr_t bno, /* starting bno of inode cluster */ | |
57 | xfs_bstat_t *buf, /* return buffer */ | |
58 | int *stat) /* BULKSTAT_RV_... */ | |
59 | { | |
347d1c01 | 60 | xfs_icdinode_t *dic; /* dinode core info pointer */ |
1da177e4 | 61 | xfs_inode_t *ip; /* incore inode pointer */ |
f9581b14 | 62 | struct inode *inode; |
1da177e4 LT |
63 | int error; |
64 | ||
745b1f47 NS |
65 | error = xfs_iget(mp, NULL, ino, |
66 | XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno); | |
1da177e4 LT |
67 | if (error) { |
68 | *stat = BULKSTAT_RV_NOTHING; | |
69 | return error; | |
70 | } | |
71 | ||
72 | ASSERT(ip != NULL); | |
92bfc6e7 | 73 | ASSERT(ip->i_imap.im_blkno != 0); |
1da177e4 LT |
74 | |
75 | dic = &ip->i_d; | |
f9581b14 | 76 | inode = VFS_I(ip); |
1da177e4 LT |
77 | |
78 | /* xfs_iget returns the following without needing | |
79 | * further change. | |
80 | */ | |
81 | buf->bs_nlink = dic->di_nlink; | |
82 | buf->bs_projid = dic->di_projid; | |
83 | buf->bs_ino = ino; | |
84 | buf->bs_mode = dic->di_mode; | |
85 | buf->bs_uid = dic->di_uid; | |
86 | buf->bs_gid = dic->di_gid; | |
87 | buf->bs_size = dic->di_size; | |
f9581b14 | 88 | |
8fab451e | 89 | /* |
f9581b14 CH |
90 | * We need to read the timestamps from the Linux inode because |
91 | * the VFS keeps writing directly into the inode structure instead | |
92 | * of telling us about the updates. | |
8fab451e | 93 | */ |
f9581b14 CH |
94 | buf->bs_atime.tv_sec = inode->i_atime.tv_sec; |
95 | buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec; | |
96 | buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec; | |
97 | buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec; | |
98 | buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec; | |
99 | buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec; | |
100 | ||
1da177e4 LT |
101 | buf->bs_xflags = xfs_ip2xflags(ip); |
102 | buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
103 | buf->bs_extents = dic->di_nextents; | |
104 | buf->bs_gen = dic->di_gen; | |
105 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); | |
106 | buf->bs_dmevmask = dic->di_dmevmask; | |
107 | buf->bs_dmstate = dic->di_dmstate; | |
108 | buf->bs_aextents = dic->di_anextents; | |
07000ee6 | 109 | buf->bs_forkoff = XFS_IFORK_BOFF(ip); |
1da177e4 LT |
110 | |
111 | switch (dic->di_format) { | |
112 | case XFS_DINODE_FMT_DEV: | |
113 | buf->bs_rdev = ip->i_df.if_u2.if_rdev; | |
114 | buf->bs_blksize = BLKDEV_IOSIZE; | |
115 | buf->bs_blocks = 0; | |
116 | break; | |
117 | case XFS_DINODE_FMT_LOCAL: | |
118 | case XFS_DINODE_FMT_UUID: | |
119 | buf->bs_rdev = 0; | |
120 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
121 | buf->bs_blocks = 0; | |
122 | break; | |
123 | case XFS_DINODE_FMT_EXTENTS: | |
124 | case XFS_DINODE_FMT_BTREE: | |
125 | buf->bs_rdev = 0; | |
126 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
127 | buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; | |
128 | break; | |
129 | } | |
130 | ||
1da177e4 LT |
131 | xfs_iput(ip, XFS_ILOCK_SHARED); |
132 | return error; | |
133 | } | |
134 | ||
7b073390 | 135 | STATIC void |
1da177e4 LT |
136 | xfs_bulkstat_one_dinode( |
137 | xfs_mount_t *mp, /* mount point for filesystem */ | |
138 | xfs_ino_t ino, /* inode number to get data for */ | |
81591fe2 | 139 | xfs_dinode_t *dic, /* dinode inode pointer */ |
1da177e4 LT |
140 | xfs_bstat_t *buf) /* return buffer */ |
141 | { | |
1da177e4 LT |
142 | /* |
143 | * The inode format changed when we moved the link count and | |
144 | * made it 32 bits long. If this is an old format inode, | |
145 | * convert it in memory to look like a new one. If it gets | |
146 | * flushed to disk we will convert back before flushing or | |
147 | * logging it. We zero out the new projid field and the old link | |
148 | * count field. We'll handle clearing the pad field (the remains | |
149 | * of the old uuid field) when we actually convert the inode to | |
150 | * the new format. We don't change the version number so that we | |
151 | * can distinguish this from a real new format inode. | |
152 | */ | |
51ce16d5 | 153 | if (dic->di_version == 1) { |
347d1c01 | 154 | buf->bs_nlink = be16_to_cpu(dic->di_onlink); |
1da177e4 LT |
155 | buf->bs_projid = 0; |
156 | } else { | |
347d1c01 CH |
157 | buf->bs_nlink = be32_to_cpu(dic->di_nlink); |
158 | buf->bs_projid = be16_to_cpu(dic->di_projid); | |
1da177e4 LT |
159 | } |
160 | ||
161 | buf->bs_ino = ino; | |
347d1c01 CH |
162 | buf->bs_mode = be16_to_cpu(dic->di_mode); |
163 | buf->bs_uid = be32_to_cpu(dic->di_uid); | |
164 | buf->bs_gid = be32_to_cpu(dic->di_gid); | |
165 | buf->bs_size = be64_to_cpu(dic->di_size); | |
166 | buf->bs_atime.tv_sec = be32_to_cpu(dic->di_atime.t_sec); | |
167 | buf->bs_atime.tv_nsec = be32_to_cpu(dic->di_atime.t_nsec); | |
168 | buf->bs_mtime.tv_sec = be32_to_cpu(dic->di_mtime.t_sec); | |
169 | buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec); | |
170 | buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec); | |
171 | buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec); | |
81591fe2 | 172 | buf->bs_xflags = xfs_dic2xflags(dic); |
347d1c01 CH |
173 | buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog; |
174 | buf->bs_extents = be32_to_cpu(dic->di_nextents); | |
175 | buf->bs_gen = be32_to_cpu(dic->di_gen); | |
1da177e4 | 176 | memset(buf->bs_pad, 0, sizeof(buf->bs_pad)); |
347d1c01 CH |
177 | buf->bs_dmevmask = be32_to_cpu(dic->di_dmevmask); |
178 | buf->bs_dmstate = be16_to_cpu(dic->di_dmstate); | |
179 | buf->bs_aextents = be16_to_cpu(dic->di_anextents); | |
07000ee6 | 180 | buf->bs_forkoff = XFS_DFORK_BOFF(dic); |
1da177e4 | 181 | |
347d1c01 | 182 | switch (dic->di_format) { |
1da177e4 | 183 | case XFS_DINODE_FMT_DEV: |
81591fe2 | 184 | buf->bs_rdev = xfs_dinode_get_rdev(dic); |
1da177e4 LT |
185 | buf->bs_blksize = BLKDEV_IOSIZE; |
186 | buf->bs_blocks = 0; | |
187 | break; | |
188 | case XFS_DINODE_FMT_LOCAL: | |
189 | case XFS_DINODE_FMT_UUID: | |
190 | buf->bs_rdev = 0; | |
191 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
192 | buf->bs_blocks = 0; | |
193 | break; | |
194 | case XFS_DINODE_FMT_EXTENTS: | |
195 | case XFS_DINODE_FMT_BTREE: | |
196 | buf->bs_rdev = 0; | |
197 | buf->bs_blksize = mp->m_sb.sb_blocksize; | |
347d1c01 | 198 | buf->bs_blocks = be64_to_cpu(dic->di_nblocks); |
1da177e4 LT |
199 | break; |
200 | } | |
1da177e4 LT |
201 | } |
202 | ||
65fbaf24 | 203 | /* Return 0 on success or positive error */ |
faa63e95 MM |
204 | STATIC int |
205 | xfs_bulkstat_one_fmt( | |
206 | void __user *ubuffer, | |
65fbaf24 | 207 | int ubsize, |
208 | int *ubused, | |
faa63e95 MM |
209 | const xfs_bstat_t *buffer) |
210 | { | |
65fbaf24 | 211 | if (ubsize < sizeof(*buffer)) |
212 | return XFS_ERROR(ENOMEM); | |
faa63e95 | 213 | if (copy_to_user(ubuffer, buffer, sizeof(*buffer))) |
65fbaf24 | 214 | return XFS_ERROR(EFAULT); |
215 | if (ubused) | |
216 | *ubused = sizeof(*buffer); | |
217 | return 0; | |
faa63e95 MM |
218 | } |
219 | ||
1da177e4 LT |
220 | /* |
221 | * Return stat information for one inode. | |
222 | * Return 0 if ok, else errno. | |
223 | */ | |
2ee4fa5c | 224 | int /* error status */ |
225 | xfs_bulkstat_one_int( | |
1da177e4 LT |
226 | xfs_mount_t *mp, /* mount point for filesystem */ |
227 | xfs_ino_t ino, /* inode number to get data for */ | |
228 | void __user *buffer, /* buffer to place output in */ | |
229 | int ubsize, /* size of buffer */ | |
2ee4fa5c | 230 | bulkstat_one_fmt_pf formatter, /* formatter, copy to user */ |
1da177e4 LT |
231 | xfs_daddr_t bno, /* starting bno of inode cluster */ |
232 | int *ubused, /* bytes used by me */ | |
233 | void *dibuff, /* on-disk inode buffer */ | |
234 | int *stat) /* BULKSTAT_RV_... */ | |
235 | { | |
236 | xfs_bstat_t *buf; /* return buffer */ | |
237 | int error = 0; /* error value */ | |
238 | xfs_dinode_t *dip; /* dinode inode pointer */ | |
239 | ||
240 | dip = (xfs_dinode_t *)dibuff; | |
6f1f2168 | 241 | *stat = BULKSTAT_RV_NOTHING; |
1da177e4 | 242 | |
6f1f2168 | 243 | if (!buffer || xfs_internal_inum(mp, ino)) |
1da177e4 | 244 | return XFS_ERROR(EINVAL); |
1da177e4 LT |
245 | |
246 | buf = kmem_alloc(sizeof(*buf), KM_SLEEP); | |
247 | ||
248 | if (dip == NULL) { | |
249 | /* We're not being passed a pointer to a dinode. This happens | |
250 | * if BULKSTAT_FG_IGET is selected. Do the iget. | |
251 | */ | |
252 | error = xfs_bulkstat_one_iget(mp, ino, bno, buf, stat); | |
253 | if (error) | |
254 | goto out_free; | |
255 | } else { | |
256 | xfs_bulkstat_one_dinode(mp, ino, dip, buf); | |
257 | } | |
258 | ||
65fbaf24 | 259 | error = formatter(buffer, ubsize, ubused, buf); |
260 | if (error) | |
1da177e4 | 261 | goto out_free; |
1da177e4 LT |
262 | |
263 | *stat = BULKSTAT_RV_DIDONE; | |
1da177e4 LT |
264 | |
265 | out_free: | |
f0e2d93c | 266 | kmem_free(buf); |
1da177e4 LT |
267 | return error; |
268 | } | |
269 | ||
2ee4fa5c | 270 | int |
271 | xfs_bulkstat_one( | |
272 | xfs_mount_t *mp, /* mount point for filesystem */ | |
273 | xfs_ino_t ino, /* inode number to get data for */ | |
274 | void __user *buffer, /* buffer to place output in */ | |
275 | int ubsize, /* size of buffer */ | |
276 | void *private_data, /* my private data */ | |
277 | xfs_daddr_t bno, /* starting bno of inode cluster */ | |
278 | int *ubused, /* bytes used by me */ | |
279 | void *dibuff, /* on-disk inode buffer */ | |
280 | int *stat) /* BULKSTAT_RV_... */ | |
281 | { | |
282 | return xfs_bulkstat_one_int(mp, ino, buffer, ubsize, | |
283 | xfs_bulkstat_one_fmt, bno, | |
284 | ubused, dibuff, stat); | |
285 | } | |
286 | ||
8b56f083 NS |
287 | /* |
288 | * Test to see whether we can use the ondisk inode directly, based | |
289 | * on the given bulkstat flags, filling in dipp accordingly. | |
290 | * Returns zero if the inode is dodgey. | |
291 | */ | |
292 | STATIC int | |
293 | xfs_bulkstat_use_dinode( | |
294 | xfs_mount_t *mp, | |
295 | int flags, | |
296 | xfs_buf_t *bp, | |
297 | int clustidx, | |
298 | xfs_dinode_t **dipp) | |
299 | { | |
300 | xfs_dinode_t *dip; | |
301 | unsigned int aformat; | |
302 | ||
303 | *dipp = NULL; | |
304 | if (!bp || (flags & BULKSTAT_FG_IGET)) | |
305 | return 1; | |
306 | dip = (xfs_dinode_t *) | |
307 | xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog); | |
859d7182 | 308 | /* |
c319b58b | 309 | * Check the buffer containing the on-disk inode for di_mode == 0. |
859d7182 VA |
310 | * This is to prevent xfs_bulkstat from picking up just reclaimed |
311 | * inodes that have their in-core state initialized but not flushed | |
312 | * to disk yet. This is a temporary hack that would require a proper | |
313 | * fix in the future. | |
314 | */ | |
81591fe2 CH |
315 | if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC || |
316 | !XFS_DINODE_GOOD_VERSION(dip->di_version) || | |
317 | !dip->di_mode) | |
8b56f083 NS |
318 | return 0; |
319 | if (flags & BULKSTAT_FG_QUICK) { | |
320 | *dipp = dip; | |
321 | return 1; | |
322 | } | |
323 | /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */ | |
81591fe2 | 324 | aformat = dip->di_aformat; |
45ba598e | 325 | if ((XFS_DFORK_Q(dip) == 0) || |
8b56f083 | 326 | (aformat == XFS_DINODE_FMT_LOCAL) || |
81591fe2 | 327 | (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_anextents)) { |
8b56f083 NS |
328 | *dipp = dip; |
329 | return 1; | |
330 | } | |
331 | return 1; | |
332 | } | |
333 | ||
cd57e594 LM |
334 | #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size) |
335 | ||
1da177e4 LT |
336 | /* |
337 | * Return stat information in bulk (by-inode) for the filesystem. | |
338 | */ | |
339 | int /* error status */ | |
340 | xfs_bulkstat( | |
341 | xfs_mount_t *mp, /* mount point for filesystem */ | |
342 | xfs_ino_t *lastinop, /* last inode returned */ | |
343 | int *ubcountp, /* size of buffer/count returned */ | |
344 | bulkstat_one_pf formatter, /* func that'd fill a single buf */ | |
345 | void *private_data,/* private data for formatter */ | |
346 | size_t statstruct_size, /* sizeof struct filling */ | |
347 | char __user *ubuffer, /* buffer with inode stats */ | |
348 | int flags, /* defined in xfs_itable.h */ | |
c41564b5 | 349 | int *done) /* 1 if there are more stats to get */ |
1da177e4 LT |
350 | { |
351 | xfs_agblock_t agbno=0;/* allocation group block number */ | |
352 | xfs_buf_t *agbp; /* agi header buffer */ | |
353 | xfs_agi_t *agi; /* agi header data */ | |
354 | xfs_agino_t agino; /* inode # in allocation group */ | |
355 | xfs_agnumber_t agno; /* allocation group number */ | |
356 | xfs_daddr_t bno; /* inode cluster start daddr */ | |
357 | int chunkidx; /* current index into inode chunk */ | |
358 | int clustidx; /* current index into inode cluster */ | |
359 | xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */ | |
360 | int end_of_ag; /* set if we've seen the ag end */ | |
361 | int error; /* error code */ | |
362 | int fmterror;/* bulkstat formatter result */ | |
1da177e4 LT |
363 | int i; /* loop index */ |
364 | int icount; /* count of inodes good in irbuf */ | |
215101c3 | 365 | size_t irbsize; /* size of irec buffer in bytes */ |
1da177e4 | 366 | xfs_ino_t ino; /* inode number (filesystem) */ |
26275093 NS |
367 | xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */ |
368 | xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */ | |
369 | xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */ | |
cd57e594 | 370 | xfs_ino_t lastino; /* last inode number returned */ |
1da177e4 LT |
371 | int nbcluster; /* # of blocks in a cluster */ |
372 | int nicluster; /* # of inodes in a cluster */ | |
373 | int nimask; /* mask for inode clusters */ | |
374 | int nirbuf; /* size of irbuf */ | |
375 | int rval; /* return value error code */ | |
376 | int tmp; /* result value from btree calls */ | |
377 | int ubcount; /* size of user's buffer */ | |
378 | int ubleft; /* bytes left in user's buffer */ | |
379 | char __user *ubufp; /* pointer into user's buffer */ | |
380 | int ubelem; /* spaces used in user's buffer */ | |
381 | int ubused; /* bytes used by formatter */ | |
382 | xfs_buf_t *bp; /* ptr to on-disk inode cluster buf */ | |
383 | xfs_dinode_t *dip; /* ptr into bp for specific inode */ | |
1da177e4 LT |
384 | |
385 | /* | |
386 | * Get the last inode value, see if there's nothing to do. | |
387 | */ | |
388 | ino = (xfs_ino_t)*lastinop; | |
cd57e594 | 389 | lastino = ino; |
1da177e4 LT |
390 | dip = NULL; |
391 | agno = XFS_INO_TO_AGNO(mp, ino); | |
392 | agino = XFS_INO_TO_AGINO(mp, ino); | |
393 | if (agno >= mp->m_sb.sb_agcount || | |
394 | ino != XFS_AGINO_TO_INO(mp, agno, agino)) { | |
395 | *done = 1; | |
396 | *ubcountp = 0; | |
397 | return 0; | |
398 | } | |
cd57e594 LM |
399 | if (!ubcountp || *ubcountp <= 0) { |
400 | return EINVAL; | |
401 | } | |
1da177e4 LT |
402 | ubcount = *ubcountp; /* statstruct's */ |
403 | ubleft = ubcount * statstruct_size; /* bytes */ | |
404 | *ubcountp = ubelem = 0; | |
405 | *done = 0; | |
406 | fmterror = 0; | |
407 | ubufp = ubuffer; | |
408 | nicluster = mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp) ? | |
409 | mp->m_sb.sb_inopblock : | |
410 | (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog); | |
411 | nimask = ~(nicluster - 1); | |
412 | nbcluster = nicluster >> mp->m_sb.sb_inopblog; | |
bdfb0430 CH |
413 | irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4); |
414 | if (!irbuf) | |
415 | return ENOMEM; | |
416 | ||
bb3c7d29 NS |
417 | nirbuf = irbsize / sizeof(*irbuf); |
418 | ||
1da177e4 LT |
419 | /* |
420 | * Loop over the allocation groups, starting from the last | |
421 | * inode returned; 0 means start of the allocation group. | |
422 | */ | |
423 | rval = 0; | |
cd57e594 LM |
424 | while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) { |
425 | cond_resched(); | |
1da177e4 | 426 | bp = NULL; |
1da177e4 | 427 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
1da177e4 LT |
428 | if (error) { |
429 | /* | |
430 | * Skip this allocation group and go to the next one. | |
431 | */ | |
432 | agno++; | |
433 | agino = 0; | |
434 | continue; | |
435 | } | |
436 | agi = XFS_BUF_TO_AGI(agbp); | |
437 | /* | |
438 | * Allocate and initialize a btree cursor for ialloc btree. | |
439 | */ | |
561f7d17 | 440 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno); |
1da177e4 LT |
441 | irbp = irbuf; |
442 | irbufend = irbuf + nirbuf; | |
443 | end_of_ag = 0; | |
444 | /* | |
445 | * If we're returning in the middle of an allocation group, | |
446 | * we need to get the remainder of the chunk we're in. | |
447 | */ | |
448 | if (agino > 0) { | |
2e287a73 CH |
449 | xfs_inobt_rec_incore_t r; |
450 | ||
1da177e4 LT |
451 | /* |
452 | * Lookup the inode chunk that this inode lives in. | |
453 | */ | |
21875505 CH |
454 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, |
455 | &tmp); | |
1da177e4 LT |
456 | if (!error && /* no I/O error */ |
457 | tmp && /* lookup succeeded */ | |
458 | /* got the record, should always work */ | |
2e287a73 | 459 | !(error = xfs_inobt_get_rec(cur, &r, &i)) && |
1da177e4 LT |
460 | i == 1 && |
461 | /* this is the right chunk */ | |
2e287a73 | 462 | agino < r.ir_startino + XFS_INODES_PER_CHUNK && |
1da177e4 | 463 | /* lastino was not last in chunk */ |
2e287a73 | 464 | (chunkidx = agino - r.ir_startino + 1) < |
1da177e4 LT |
465 | XFS_INODES_PER_CHUNK && |
466 | /* there are some left allocated */ | |
9d87c319 | 467 | xfs_inobt_maskn(chunkidx, |
2e287a73 CH |
468 | XFS_INODES_PER_CHUNK - chunkidx) & |
469 | ~r.ir_free) { | |
1da177e4 LT |
470 | /* |
471 | * Grab the chunk record. Mark all the | |
472 | * uninteresting inodes (because they're | |
473 | * before our start point) free. | |
474 | */ | |
475 | for (i = 0; i < chunkidx; i++) { | |
2e287a73 CH |
476 | if (XFS_INOBT_MASK(i) & ~r.ir_free) |
477 | r.ir_freecount++; | |
1da177e4 | 478 | } |
2e287a73 CH |
479 | r.ir_free |= xfs_inobt_maskn(0, chunkidx); |
480 | irbp->ir_startino = r.ir_startino; | |
481 | irbp->ir_freecount = r.ir_freecount; | |
482 | irbp->ir_free = r.ir_free; | |
1da177e4 | 483 | irbp++; |
2e287a73 CH |
484 | agino = r.ir_startino + XFS_INODES_PER_CHUNK; |
485 | icount = XFS_INODES_PER_CHUNK - r.ir_freecount; | |
1da177e4 LT |
486 | } else { |
487 | /* | |
488 | * If any of those tests failed, bump the | |
489 | * inode number (just in case). | |
490 | */ | |
491 | agino++; | |
492 | icount = 0; | |
493 | } | |
494 | /* | |
495 | * In any case, increment to the next record. | |
496 | */ | |
497 | if (!error) | |
637aa50f | 498 | error = xfs_btree_increment(cur, 0, &tmp); |
1da177e4 LT |
499 | } else { |
500 | /* | |
501 | * Start of ag. Lookup the first inode chunk. | |
502 | */ | |
21875505 | 503 | error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp); |
1da177e4 LT |
504 | icount = 0; |
505 | } | |
506 | /* | |
507 | * Loop through inode btree records in this ag, | |
508 | * until we run out of inodes or space in the buffer. | |
509 | */ | |
510 | while (irbp < irbufend && icount < ubcount) { | |
2e287a73 CH |
511 | xfs_inobt_rec_incore_t r; |
512 | ||
1da177e4 LT |
513 | /* |
514 | * Loop as long as we're unable to read the | |
515 | * inode btree. | |
516 | */ | |
517 | while (error) { | |
518 | agino += XFS_INODES_PER_CHUNK; | |
519 | if (XFS_AGINO_TO_AGBNO(mp, agino) >= | |
16259e7d | 520 | be32_to_cpu(agi->agi_length)) |
1da177e4 | 521 | break; |
21875505 CH |
522 | error = xfs_inobt_lookup(cur, agino, |
523 | XFS_LOOKUP_GE, &tmp); | |
cd57e594 | 524 | cond_resched(); |
1da177e4 LT |
525 | } |
526 | /* | |
527 | * If ran off the end of the ag either with an error, | |
528 | * or the normal way, set end and stop collecting. | |
529 | */ | |
2e287a73 CH |
530 | if (error) { |
531 | end_of_ag = 1; | |
532 | break; | |
533 | } | |
534 | ||
535 | error = xfs_inobt_get_rec(cur, &r, &i); | |
536 | if (error || i == 0) { | |
1da177e4 LT |
537 | end_of_ag = 1; |
538 | break; | |
539 | } | |
2e287a73 | 540 | |
1da177e4 LT |
541 | /* |
542 | * If this chunk has any allocated inodes, save it. | |
26275093 | 543 | * Also start read-ahead now for this chunk. |
1da177e4 | 544 | */ |
2e287a73 | 545 | if (r.ir_freecount < XFS_INODES_PER_CHUNK) { |
26275093 NS |
546 | /* |
547 | * Loop over all clusters in the next chunk. | |
548 | * Do a readahead if there are any allocated | |
549 | * inodes in that cluster. | |
550 | */ | |
2e287a73 CH |
551 | agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino); |
552 | for (chunkidx = 0; | |
26275093 NS |
553 | chunkidx < XFS_INODES_PER_CHUNK; |
554 | chunkidx += nicluster, | |
555 | agbno += nbcluster) { | |
2e287a73 CH |
556 | if (xfs_inobt_maskn(chunkidx, nicluster) |
557 | & ~r.ir_free) | |
26275093 NS |
558 | xfs_btree_reada_bufs(mp, agno, |
559 | agbno, nbcluster); | |
560 | } | |
2e287a73 CH |
561 | irbp->ir_startino = r.ir_startino; |
562 | irbp->ir_freecount = r.ir_freecount; | |
563 | irbp->ir_free = r.ir_free; | |
1da177e4 | 564 | irbp++; |
2e287a73 | 565 | icount += XFS_INODES_PER_CHUNK - r.ir_freecount; |
1da177e4 LT |
566 | } |
567 | /* | |
568 | * Set agino to after this chunk and bump the cursor. | |
569 | */ | |
2e287a73 | 570 | agino = r.ir_startino + XFS_INODES_PER_CHUNK; |
637aa50f | 571 | error = xfs_btree_increment(cur, 0, &tmp); |
cd57e594 | 572 | cond_resched(); |
1da177e4 LT |
573 | } |
574 | /* | |
575 | * Drop the btree buffers and the agi buffer. | |
576 | * We can't hold any of the locks these represent | |
577 | * when calling iget. | |
578 | */ | |
579 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
580 | xfs_buf_relse(agbp); | |
581 | /* | |
582 | * Now format all the good inodes into the user's buffer. | |
583 | */ | |
584 | irbufend = irbp; | |
585 | for (irbp = irbuf; | |
cd57e594 | 586 | irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) { |
1da177e4 LT |
587 | /* |
588 | * Now process this chunk of inodes. | |
589 | */ | |
26275093 | 590 | for (agino = irbp->ir_startino, chunkidx = clustidx = 0; |
cd57e594 | 591 | XFS_BULKSTAT_UBLEFT(ubleft) && |
26275093 | 592 | irbp->ir_freecount < XFS_INODES_PER_CHUNK; |
1da177e4 LT |
593 | chunkidx++, clustidx++, agino++) { |
594 | ASSERT(chunkidx < XFS_INODES_PER_CHUNK); | |
595 | /* | |
596 | * Recompute agbno if this is the | |
597 | * first inode of the cluster. | |
598 | * | |
599 | * Careful with clustidx. There can be | |
9da096fd | 600 | * multiple clusters per chunk, a single |
1da177e4 LT |
601 | * cluster per chunk or a cluster that has |
602 | * inodes represented from several different | |
603 | * chunks (if blocksize is large). | |
604 | * | |
605 | * Because of this, the starting clustidx is | |
606 | * initialized to zero in this loop but must | |
607 | * later be reset after reading in the cluster | |
608 | * buffer. | |
609 | */ | |
610 | if ((chunkidx & (nicluster - 1)) == 0) { | |
611 | agbno = XFS_AGINO_TO_AGBNO(mp, | |
26275093 | 612 | irbp->ir_startino) + |
1da177e4 LT |
613 | ((chunkidx & nimask) >> |
614 | mp->m_sb.sb_inopblog); | |
615 | ||
8b56f083 NS |
616 | if (flags & (BULKSTAT_FG_QUICK | |
617 | BULKSTAT_FG_INLINE)) { | |
c679eef0 CH |
618 | int offset; |
619 | ||
1da177e4 LT |
620 | ino = XFS_AGINO_TO_INO(mp, agno, |
621 | agino); | |
622 | bno = XFS_AGB_TO_DADDR(mp, agno, | |
623 | agbno); | |
624 | ||
625 | /* | |
626 | * Get the inode cluster buffer | |
627 | */ | |
1da177e4 LT |
628 | if (bp) |
629 | xfs_buf_relse(bp); | |
c679eef0 CH |
630 | |
631 | error = xfs_inotobp(mp, NULL, ino, &dip, | |
632 | &bp, &offset, | |
b48d8d64 | 633 | XFS_IGET_BULKSTAT); |
c679eef0 | 634 | |
1da177e4 | 635 | if (!error) |
c679eef0 | 636 | clustidx = offset / mp->m_sb.sb_inodesize; |
1da177e4 LT |
637 | if (XFS_TEST_ERROR(error != 0, |
638 | mp, XFS_ERRTAG_BULKSTAT_READ_CHUNK, | |
639 | XFS_RANDOM_BULKSTAT_READ_CHUNK)) { | |
640 | bp = NULL; | |
b12dd342 NS |
641 | ubleft = 0; |
642 | rval = error; | |
1da177e4 LT |
643 | break; |
644 | } | |
645 | } | |
646 | } | |
c2cba57e LM |
647 | ino = XFS_AGINO_TO_INO(mp, agno, agino); |
648 | bno = XFS_AGB_TO_DADDR(mp, agno, agbno); | |
1da177e4 LT |
649 | /* |
650 | * Skip if this inode is free. | |
651 | */ | |
c2cba57e LM |
652 | if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) { |
653 | lastino = ino; | |
1da177e4 | 654 | continue; |
c2cba57e | 655 | } |
1da177e4 LT |
656 | /* |
657 | * Count used inodes as free so we can tell | |
658 | * when the chunk is used up. | |
659 | */ | |
26275093 | 660 | irbp->ir_freecount++; |
8b56f083 | 661 | if (!xfs_bulkstat_use_dinode(mp, flags, bp, |
c2cba57e LM |
662 | clustidx, &dip)) { |
663 | lastino = ino; | |
8b56f083 | 664 | continue; |
c2cba57e | 665 | } |
8b56f083 NS |
666 | /* |
667 | * If we need to do an iget, cannot hold bp. | |
668 | * Drop it, until starting the next cluster. | |
669 | */ | |
670 | if ((flags & BULKSTAT_FG_INLINE) && !dip) { | |
671 | if (bp) | |
672 | xfs_buf_relse(bp); | |
673 | bp = NULL; | |
1da177e4 LT |
674 | } |
675 | ||
676 | /* | |
677 | * Get the inode and fill in a single buffer. | |
678 | * BULKSTAT_FG_QUICK uses dip to fill it in. | |
679 | * BULKSTAT_FG_IGET uses igets. | |
8b56f083 NS |
680 | * BULKSTAT_FG_INLINE uses dip if we have an |
681 | * inline attr fork, else igets. | |
1da177e4 LT |
682 | * See: xfs_bulkstat_one & xfs_dm_bulkstat_one. |
683 | * This is also used to count inodes/blks, etc | |
684 | * in xfs_qm_quotacheck. | |
685 | */ | |
686 | ubused = statstruct_size; | |
687 | error = formatter(mp, ino, ubufp, | |
688 | ubleft, private_data, | |
689 | bno, &ubused, dip, &fmterror); | |
690 | if (fmterror == BULKSTAT_RV_NOTHING) { | |
cd57e594 LM |
691 | if (error && error != ENOENT && |
692 | error != EINVAL) { | |
e132f54c | 693 | ubleft = 0; |
cd57e594 LM |
694 | rval = error; |
695 | break; | |
696 | } | |
697 | lastino = ino; | |
1da177e4 LT |
698 | continue; |
699 | } | |
700 | if (fmterror == BULKSTAT_RV_GIVEUP) { | |
701 | ubleft = 0; | |
702 | ASSERT(error); | |
703 | rval = error; | |
704 | break; | |
705 | } | |
706 | if (ubufp) | |
707 | ubufp += ubused; | |
708 | ubleft -= ubused; | |
709 | ubelem++; | |
710 | lastino = ino; | |
711 | } | |
cd57e594 LM |
712 | |
713 | cond_resched(); | |
1da177e4 LT |
714 | } |
715 | ||
716 | if (bp) | |
717 | xfs_buf_relse(bp); | |
718 | ||
719 | /* | |
720 | * Set up for the next loop iteration. | |
721 | */ | |
cd57e594 | 722 | if (XFS_BULKSTAT_UBLEFT(ubleft)) { |
1da177e4 LT |
723 | if (end_of_ag) { |
724 | agno++; | |
725 | agino = 0; | |
cd57e594 LM |
726 | } else |
727 | agino = XFS_INO_TO_AGINO(mp, lastino); | |
1da177e4 LT |
728 | } else |
729 | break; | |
730 | } | |
731 | /* | |
732 | * Done, we're either out of filesystem or space to put the data. | |
733 | */ | |
bdfb0430 | 734 | kmem_free_large(irbuf); |
1da177e4 | 735 | *ubcountp = ubelem; |
cd57e594 LM |
736 | /* |
737 | * Found some inodes, return them now and return the error next time. | |
738 | */ | |
739 | if (ubelem) | |
740 | rval = 0; | |
1da177e4 LT |
741 | if (agno >= mp->m_sb.sb_agcount) { |
742 | /* | |
743 | * If we ran out of filesystem, mark lastino as off | |
744 | * the end of the filesystem, so the next call | |
745 | * will return immediately. | |
746 | */ | |
747 | *lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0); | |
748 | *done = 1; | |
749 | } else | |
750 | *lastinop = (xfs_ino_t)lastino; | |
751 | ||
752 | return rval; | |
753 | } | |
754 | ||
755 | /* | |
756 | * Return stat information in bulk (by-inode) for the filesystem. | |
757 | * Special case for non-sequential one inode bulkstat. | |
758 | */ | |
759 | int /* error status */ | |
760 | xfs_bulkstat_single( | |
761 | xfs_mount_t *mp, /* mount point for filesystem */ | |
762 | xfs_ino_t *lastinop, /* inode to return */ | |
763 | char __user *buffer, /* buffer with inode stats */ | |
c41564b5 | 764 | int *done) /* 1 if there are more stats to get */ |
1da177e4 LT |
765 | { |
766 | int count; /* count value for bulkstat call */ | |
767 | int error; /* return value */ | |
768 | xfs_ino_t ino; /* filesystem inode number */ | |
769 | int res; /* result from bs1 */ | |
770 | ||
771 | /* | |
772 | * note that requesting valid inode numbers which are not allocated | |
773 | * to inodes will most likely cause xfs_itobp to generate warning | |
774 | * messages about bad magic numbers. This is ok. The fact that | |
775 | * the inode isn't actually an inode is handled by the | |
776 | * error check below. Done this way to make the usual case faster | |
777 | * at the expense of the error case. | |
778 | */ | |
779 | ||
780 | ino = (xfs_ino_t)*lastinop; | |
781 | error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), | |
782 | NULL, 0, NULL, NULL, &res); | |
783 | if (error) { | |
784 | /* | |
785 | * Special case way failed, do it the "long" way | |
786 | * to see if that works. | |
787 | */ | |
788 | (*lastinop)--; | |
789 | count = 1; | |
790 | if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one, | |
791 | NULL, sizeof(xfs_bstat_t), buffer, | |
792 | BULKSTAT_FG_IGET, done)) | |
793 | return error; | |
794 | if (count == 0 || (xfs_ino_t)*lastinop != ino) | |
795 | return error == EFSCORRUPTED ? | |
796 | XFS_ERROR(EINVAL) : error; | |
797 | else | |
798 | return 0; | |
799 | } | |
800 | *done = 0; | |
801 | return 0; | |
802 | } | |
803 | ||
faa63e95 MM |
804 | int |
805 | xfs_inumbers_fmt( | |
806 | void __user *ubuffer, /* buffer to write to */ | |
807 | const xfs_inogrp_t *buffer, /* buffer to read from */ | |
808 | long count, /* # of elements to read */ | |
809 | long *written) /* # of bytes written */ | |
810 | { | |
811 | if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer))) | |
812 | return -EFAULT; | |
813 | *written = count * sizeof(*buffer); | |
814 | return 0; | |
815 | } | |
816 | ||
1da177e4 LT |
817 | /* |
818 | * Return inode number table for the filesystem. | |
819 | */ | |
820 | int /* error status */ | |
821 | xfs_inumbers( | |
822 | xfs_mount_t *mp, /* mount point for filesystem */ | |
823 | xfs_ino_t *lastino, /* last inode returned */ | |
824 | int *count, /* size of buffer/count returned */ | |
faa63e95 MM |
825 | void __user *ubuffer,/* buffer with inode descriptions */ |
826 | inumbers_fmt_pf formatter) | |
1da177e4 LT |
827 | { |
828 | xfs_buf_t *agbp; | |
829 | xfs_agino_t agino; | |
830 | xfs_agnumber_t agno; | |
831 | int bcount; | |
832 | xfs_inogrp_t *buffer; | |
833 | int bufidx; | |
834 | xfs_btree_cur_t *cur; | |
835 | int error; | |
2e287a73 | 836 | xfs_inobt_rec_incore_t r; |
1da177e4 LT |
837 | int i; |
838 | xfs_ino_t ino; | |
839 | int left; | |
840 | int tmp; | |
841 | ||
842 | ino = (xfs_ino_t)*lastino; | |
843 | agno = XFS_INO_TO_AGNO(mp, ino); | |
844 | agino = XFS_INO_TO_AGINO(mp, ino); | |
845 | left = *count; | |
846 | *count = 0; | |
e6a4b37f | 847 | bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer))); |
1da177e4 LT |
848 | buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP); |
849 | error = bufidx = 0; | |
850 | cur = NULL; | |
851 | agbp = NULL; | |
852 | while (left > 0 && agno < mp->m_sb.sb_agcount) { | |
853 | if (agbp == NULL) { | |
1da177e4 | 854 | error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp); |
1da177e4 LT |
855 | if (error) { |
856 | /* | |
857 | * If we can't read the AGI of this ag, | |
858 | * then just skip to the next one. | |
859 | */ | |
860 | ASSERT(cur == NULL); | |
861 | agbp = NULL; | |
862 | agno++; | |
863 | agino = 0; | |
864 | continue; | |
865 | } | |
561f7d17 | 866 | cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno); |
21875505 CH |
867 | error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE, |
868 | &tmp); | |
1da177e4 LT |
869 | if (error) { |
870 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
871 | cur = NULL; | |
872 | xfs_buf_relse(agbp); | |
873 | agbp = NULL; | |
874 | /* | |
59c51591 | 875 | * Move up the last inode in the current |
1da177e4 LT |
876 | * chunk. The lookup_ge will always get |
877 | * us the first inode in the next chunk. | |
878 | */ | |
879 | agino += XFS_INODES_PER_CHUNK - 1; | |
880 | continue; | |
881 | } | |
882 | } | |
2e287a73 CH |
883 | error = xfs_inobt_get_rec(cur, &r, &i); |
884 | if (error || i == 0) { | |
1da177e4 LT |
885 | xfs_buf_relse(agbp); |
886 | agbp = NULL; | |
887 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
888 | cur = NULL; | |
889 | agno++; | |
890 | agino = 0; | |
891 | continue; | |
892 | } | |
2e287a73 CH |
893 | agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1; |
894 | buffer[bufidx].xi_startino = | |
895 | XFS_AGINO_TO_INO(mp, agno, r.ir_startino); | |
896 | buffer[bufidx].xi_alloccount = | |
897 | XFS_INODES_PER_CHUNK - r.ir_freecount; | |
898 | buffer[bufidx].xi_allocmask = ~r.ir_free; | |
1da177e4 LT |
899 | bufidx++; |
900 | left--; | |
901 | if (bufidx == bcount) { | |
faa63e95 MM |
902 | long written; |
903 | if (formatter(ubuffer, buffer, bufidx, &written)) { | |
1da177e4 LT |
904 | error = XFS_ERROR(EFAULT); |
905 | break; | |
906 | } | |
faa63e95 | 907 | ubuffer += written; |
1da177e4 LT |
908 | *count += bufidx; |
909 | bufidx = 0; | |
910 | } | |
911 | if (left) { | |
637aa50f | 912 | error = xfs_btree_increment(cur, 0, &tmp); |
1da177e4 LT |
913 | if (error) { |
914 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
915 | cur = NULL; | |
916 | xfs_buf_relse(agbp); | |
917 | agbp = NULL; | |
918 | /* | |
919 | * The agino value has already been bumped. | |
920 | * Just try to skip up to it. | |
921 | */ | |
922 | agino += XFS_INODES_PER_CHUNK; | |
923 | continue; | |
924 | } | |
925 | } | |
926 | } | |
927 | if (!error) { | |
928 | if (bufidx) { | |
faa63e95 MM |
929 | long written; |
930 | if (formatter(ubuffer, buffer, bufidx, &written)) | |
1da177e4 LT |
931 | error = XFS_ERROR(EFAULT); |
932 | else | |
933 | *count += bufidx; | |
934 | } | |
935 | *lastino = XFS_AGINO_TO_INO(mp, agno, agino); | |
936 | } | |
f0e2d93c | 937 | kmem_free(buffer); |
1da177e4 LT |
938 | if (cur) |
939 | xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR : | |
940 | XFS_BTREE_NOERROR)); | |
941 | if (agbp) | |
942 | xfs_buf_relse(agbp); | |
943 | return error; | |
944 | } |