1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_inode.h"
14 #include "xfs_btree.h"
15 #include "xfs_ialloc.h"
16 #include "xfs_ialloc_btree.h"
17 #include "xfs_itable.h"
18 #include "xfs_error.h"
19 #include "xfs_trace.h"
20 #include "xfs_icache.h"
21 #include "xfs_health.h"
24 * Return stat information for one inode.
25 * Return 0 if ok, else errno.
29 struct xfs_mount *mp, /* mount point for filesystem */
30 xfs_ino_t ino, /* inode to get data for */
31 void __user *buffer, /* buffer to place output in */
32 int ubsize, /* size of buffer */
33 bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
34 int *ubused, /* bytes used by me */
35 int *stat) /* BULKSTAT_RV_... */
37 struct xfs_icdinode *dic; /* dinode core info pointer */
38 struct xfs_inode *ip; /* incore inode pointer */
40 struct xfs_bstat *buf; /* return buffer */
41 int error = 0; /* error value */
43 *stat = BULKSTAT_RV_NOTHING;
45 if (!buffer || xfs_internal_inum(mp, ino))
48 buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
52 error = xfs_iget(mp, NULL, ino,
53 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
54 XFS_ILOCK_SHARED, &ip);
59 ASSERT(ip->i_imap.im_blkno != 0);
64 /* xfs_iget returns the following without needing
67 buf->bs_projid_lo = dic->di_projid_lo;
68 buf->bs_projid_hi = dic->di_projid_hi;
70 buf->bs_uid = dic->di_uid;
71 buf->bs_gid = dic->di_gid;
72 buf->bs_size = dic->di_size;
74 buf->bs_nlink = inode->i_nlink;
75 buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
76 buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
77 buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
78 buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
79 buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
80 buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
81 buf->bs_gen = inode->i_generation;
82 buf->bs_mode = inode->i_mode;
84 buf->bs_xflags = xfs_ip2xflags(ip);
85 buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
86 buf->bs_extents = dic->di_nextents;
87 memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
88 xfs_bulkstat_health(ip, buf);
89 buf->bs_dmevmask = dic->di_dmevmask;
90 buf->bs_dmstate = dic->di_dmstate;
91 buf->bs_aextents = dic->di_anextents;
92 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
94 if (dic->di_version == 3) {
95 if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
96 buf->bs_cowextsize = dic->di_cowextsize <<
100 switch (dic->di_format) {
101 case XFS_DINODE_FMT_DEV:
102 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
103 buf->bs_blksize = BLKDEV_IOSIZE;
106 case XFS_DINODE_FMT_LOCAL:
108 buf->bs_blksize = mp->m_sb.sb_blocksize;
111 case XFS_DINODE_FMT_EXTENTS:
112 case XFS_DINODE_FMT_BTREE:
114 buf->bs_blksize = mp->m_sb.sb_blocksize;
115 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
118 xfs_iunlock(ip, XFS_ILOCK_SHARED);
121 error = formatter(buffer, ubsize, ubused, buf);
123 *stat = BULKSTAT_RV_DIDONE;
130 /* Return 0 on success or positive error */
132 xfs_bulkstat_one_fmt(
133 void __user *ubuffer,
136 const xfs_bstat_t *buffer)
138 if (ubsize < sizeof(*buffer))
140 if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
143 *ubused = sizeof(*buffer);
149 xfs_mount_t *mp, /* mount point for filesystem */
150 xfs_ino_t ino, /* inode number to get data for */
151 void __user *buffer, /* buffer to place output in */
152 int ubsize, /* size of buffer */
153 int *ubused, /* bytes used by me */
154 int *stat) /* BULKSTAT_RV_... */
156 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
157 xfs_bulkstat_one_fmt, ubused, stat);
161 * Loop over all clusters in a chunk for a given incore inode allocation btree
162 * record. Do a readahead if there are any allocated inodes in that cluster.
165 xfs_bulkstat_ichunk_ra(
166 struct xfs_mount *mp,
168 struct xfs_inobt_rec_incore *irec)
170 struct xfs_ino_geometry *igeo = M_IGEO(mp);
172 struct blk_plug plug;
173 int i; /* inode chunk index */
175 agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
177 blk_start_plug(&plug);
179 i < XFS_INODES_PER_CHUNK;
180 i += igeo->inodes_per_cluster,
181 agbno += igeo->blocks_per_cluster) {
182 if (xfs_inobt_maskn(i, igeo->inodes_per_cluster) &
184 xfs_btree_reada_bufs(mp, agno, agbno,
185 igeo->blocks_per_cluster,
189 blk_finish_plug(&plug);
193 * Lookup the inode chunk that the given inode lives in and then get the record
194 * if we found the chunk. If the inode was not the last in the chunk and there
195 * are some left allocated, update the data for the pointed-to record as well as
196 * return the count of grabbed inodes.
199 xfs_bulkstat_grab_ichunk(
200 struct xfs_btree_cur *cur, /* btree cursor */
201 xfs_agino_t agino, /* starting inode of chunk */
202 int *icount,/* return # of inodes grabbed */
203 struct xfs_inobt_rec_incore *irec) /* btree record */
205 int idx; /* index into inode chunk */
209 /* Lookup the inode chunk that this inode lives in */
210 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
218 /* Get the record, should always work */
219 error = xfs_inobt_get_rec(cur, irec, &stat);
222 XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
224 /* Check if the record contains the inode in request */
225 if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
230 idx = agino - irec->ir_startino + 1;
231 if (idx < XFS_INODES_PER_CHUNK &&
232 (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
235 /* We got a right chunk with some left inodes allocated at it.
236 * Grab the chunk record. Mark all the uninteresting inodes
237 * free -- because they're before our start point.
239 for (i = 0; i < idx; i++) {
240 if (XFS_INOBT_MASK(i) & ~irec->ir_free)
241 irec->ir_freecount++;
244 irec->ir_free |= xfs_inobt_maskn(0, idx);
245 *icount = irec->ir_count - irec->ir_freecount;
251 #define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
253 struct xfs_bulkstat_agichunk {
254 char __user **ac_ubuffer;/* pointer into user's buffer */
255 int ac_ubleft; /* bytes left in user's buffer */
256 int ac_ubelem; /* spaces used in user's buffer */
260 * Process inodes in chunk with a pointer to a formatter function
261 * that will iget the inode and fill in the appropriate structure.
264 xfs_bulkstat_ag_ichunk(
265 struct xfs_mount *mp,
267 struct xfs_inobt_rec_incore *irbp,
268 bulkstat_one_pf formatter,
269 size_t statstruct_size,
270 struct xfs_bulkstat_agichunk *acp,
271 xfs_agino_t *last_agino)
273 char __user **ubufp = acp->ac_ubuffer;
276 xfs_agino_t agino = irbp->ir_startino;
278 for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK;
279 chunkidx++, agino++) {
283 /* inode won't fit in buffer, we are done */
284 if (acp->ac_ubleft < statstruct_size)
287 /* Skip if this inode is free */
288 if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
291 /* Get the inode and fill in a single buffer */
292 ubused = statstruct_size;
293 error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino),
294 *ubufp, acp->ac_ubleft, &ubused, &fmterror);
296 if (fmterror == BULKSTAT_RV_GIVEUP ||
297 (error && error != -ENOENT && error != -EINVAL)) {
303 /* be careful not to leak error if at end of chunk */
304 if (fmterror == BULKSTAT_RV_NOTHING || error) {
310 acp->ac_ubleft -= ubused;
315 * Post-update *last_agino. At this point, agino will always point one
316 * inode past the last inode we processed successfully. Hence we
317 * substract that inode when setting the *last_agino cursor so that we
318 * return the correct cookie to userspace. On the next bulkstat call,
319 * the inode under the lastino cookie will be skipped as we have already
322 *last_agino = agino - 1;
328 * Return stat information in bulk (by-inode) for the filesystem.
330 int /* error status */
332 xfs_mount_t *mp, /* mount point for filesystem */
333 xfs_ino_t *lastinop, /* last inode returned */
334 int *ubcountp, /* size of buffer/count returned */
335 bulkstat_one_pf formatter, /* func that'd fill a single buf */
336 size_t statstruct_size, /* sizeof struct filling */
337 char __user *ubuffer, /* buffer with inode stats */
338 int *done) /* 1 if there are more stats to get */
340 xfs_buf_t *agbp; /* agi header buffer */
341 xfs_agino_t agino; /* inode # in allocation group */
342 xfs_agnumber_t agno; /* allocation group number */
343 xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
344 xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
345 int nirbuf; /* size of irbuf */
346 int ubcount; /* size of user's buffer */
347 struct xfs_bulkstat_agichunk ac;
351 * Get the last inode value, see if there's nothing to do.
353 agno = XFS_INO_TO_AGNO(mp, *lastinop);
354 agino = XFS_INO_TO_AGINO(mp, *lastinop);
355 if (agno >= mp->m_sb.sb_agcount ||
356 *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) {
362 ubcount = *ubcountp; /* statstruct's */
363 ac.ac_ubuffer = &ubuffer;
364 ac.ac_ubleft = ubcount * statstruct_size; /* bytes */;
370 irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP);
373 nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf);
376 * Loop over the allocation groups, starting from the last
377 * inode returned; 0 means start of the allocation group.
379 while (agno < mp->m_sb.sb_agcount) {
380 struct xfs_inobt_rec_incore *irbp = irbuf;
381 struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf;
382 bool end_of_ag = false;
386 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
390 * Allocate and initialize a btree cursor for ialloc btree.
392 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
396 * In the middle of an allocation group, we need to get
397 * the remainder of the chunk we're in.
399 struct xfs_inobt_rec_incore r;
401 error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
405 irbp->ir_startino = r.ir_startino;
406 irbp->ir_holemask = r.ir_holemask;
407 irbp->ir_count = r.ir_count;
408 irbp->ir_freecount = r.ir_freecount;
409 irbp->ir_free = r.ir_free;
412 /* Increment to the next record */
413 error = xfs_btree_increment(cur, 0, &stat);
415 /* Start of ag. Lookup the first inode chunk */
416 error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat);
418 if (error || stat == 0) {
424 * Loop through inode btree records in this ag,
425 * until we run out of inodes or space in the buffer.
427 while (irbp < irbufend && icount < ubcount) {
428 struct xfs_inobt_rec_incore r;
430 error = xfs_inobt_get_rec(cur, &r, &stat);
431 if (error || stat == 0) {
437 * If this chunk has any allocated inodes, save it.
438 * Also start read-ahead now for this chunk.
440 if (r.ir_freecount < r.ir_count) {
441 xfs_bulkstat_ichunk_ra(mp, agno, &r);
442 irbp->ir_startino = r.ir_startino;
443 irbp->ir_holemask = r.ir_holemask;
444 irbp->ir_count = r.ir_count;
445 irbp->ir_freecount = r.ir_freecount;
446 irbp->ir_free = r.ir_free;
448 icount += r.ir_count - r.ir_freecount;
450 error = xfs_btree_increment(cur, 0, &stat);
451 if (error || stat == 0) {
459 * Drop the btree buffers and the agi buffer as we can't hold any
460 * of the locks these represent when calling iget. If there is a
461 * pending error, then we are done.
464 xfs_btree_del_cursor(cur, error);
469 * Now format all the good inodes into the user's buffer. The
470 * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer
471 * for the next loop iteration.
475 irbp < irbufend && ac.ac_ubleft >= statstruct_size;
477 error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
478 formatter, statstruct_size, &ac,
487 * If we've run out of space or had a formatting error, we
490 if (ac.ac_ubleft < statstruct_size || error)
499 * Done, we're either out of filesystem or space to put the data.
502 *ubcountp = ac.ac_ubelem;
505 * We found some inodes, so clear the error status and return them.
506 * The lastino pointer will point directly at the inode that triggered
507 * any error that occurred, so on the next call the error will be
508 * triggered again and propagated to userspace as there will be no
509 * formatted inodes in the buffer.
515 * If we ran out of filesystem, lastino will point off the end of
516 * the filesystem so the next call will return immediately.
518 *lastinop = XFS_AGINO_TO_INO(mp, agno, agino);
519 if (agno >= mp->m_sb.sb_agcount)
527 void __user *ubuffer, /* buffer to write to */
528 const struct xfs_inogrp *buffer, /* buffer to read from */
529 long count, /* # of elements to read */
530 long *written) /* # of bytes written */
532 if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
534 *written = count * sizeof(*buffer);
539 * Return inode number table for the filesystem.
541 int /* error status */
543 struct xfs_mount *mp,/* mount point for filesystem */
544 xfs_ino_t *lastino,/* last inode returned */
545 int *count,/* size of buffer/count returned */
546 void __user *ubuffer,/* buffer with inode descriptions */
547 inumbers_fmt_pf formatter)
549 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
550 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
551 struct xfs_btree_cur *cur = NULL;
552 struct xfs_buf *agbp = NULL;
553 struct xfs_inogrp *buffer;
560 if (agno >= mp->m_sb.sb_agcount ||
561 *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
564 bcount = min(left, (int)(PAGE_SIZE / sizeof(*buffer)));
565 buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP);
567 struct xfs_inobt_rec_incore r;
571 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
575 cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
577 error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
585 error = xfs_inobt_get_rec(cur, &r, &stat);
591 agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
592 buffer[bufidx].xi_startino =
593 XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
594 buffer[bufidx].xi_alloccount = r.ir_count - r.ir_freecount;
595 buffer[bufidx].xi_allocmask = ~r.ir_free;
596 if (++bufidx == bcount) {
599 error = formatter(ubuffer, buffer, bufidx, &written);
609 error = xfs_btree_increment(cur, 0, &stat);
616 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
622 } while (agno < mp->m_sb.sb_agcount);
628 error = formatter(ubuffer, buffer, bufidx, &written);
632 *lastino = XFS_AGINO_TO_INO(mp, agno, agino);
637 xfs_btree_del_cursor(cur, error);