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_iwalk.h"
18 #include "xfs_itable.h"
19 #include "xfs_error.h"
20 #include "xfs_icache.h"
21 #include "xfs_health.h"
22 #include "xfs_trans.h"
28 * Use the inode walking functions to fill out struct xfs_bulkstat for every
29 * allocated inode, then pass the stat information to some externally provided
33 struct xfs_bstat_chunk {
34 bulkstat_one_fmt_pf formatter;
35 struct xfs_ibulk *breq;
36 struct xfs_bulkstat *buf;
40 * Fill out the bulkstat info for a single inode and report it somewhere.
42 * bc->breq->lastino is effectively the inode cursor as we walk through the
43 * filesystem. Therefore, we update it any time we need to move the cursor
44 * forward, regardless of whether or not we're sending any bstat information
45 * back to userspace. If the inode is internal metadata or, has been freed
46 * out from under us, we just simply keep going.
48 * However, if any other type of error happens we want to stop right where we
49 * are so that userspace will call back with exact number of the bad inode and
50 * we can send back an error code.
52 * Note that if the formatter tells us there's no space left in the buffer we
53 * move the cursor forward and abort the walk.
58 struct user_namespace *mnt_userns,
61 struct xfs_bstat_chunk *bc)
63 struct user_namespace *sb_userns = mp->m_super->s_user_ns;
64 struct xfs_inode *ip; /* incore inode pointer */
66 struct xfs_bulkstat *buf = bc->buf;
69 if (xfs_internal_inum(mp, ino))
72 error = xfs_iget(mp, tp, ino,
73 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
74 XFS_ILOCK_SHARED, &ip);
75 if (error == -ENOENT || error == -EINVAL)
81 ASSERT(ip->i_imap.im_blkno != 0);
84 /* xfs_iget returns the following without needing
87 buf->bs_projectid = ip->i_projid;
89 buf->bs_uid = from_kuid(sb_userns, i_uid_into_mnt(mnt_userns, inode));
90 buf->bs_gid = from_kgid(sb_userns, i_gid_into_mnt(mnt_userns, inode));
91 buf->bs_size = ip->i_disk_size;
93 buf->bs_nlink = inode->i_nlink;
94 buf->bs_atime = inode->i_atime.tv_sec;
95 buf->bs_atime_nsec = inode->i_atime.tv_nsec;
96 buf->bs_mtime = inode->i_mtime.tv_sec;
97 buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
98 buf->bs_ctime = inode->i_ctime.tv_sec;
99 buf->bs_ctime_nsec = inode->i_ctime.tv_nsec;
100 buf->bs_gen = inode->i_generation;
101 buf->bs_mode = inode->i_mode;
103 buf->bs_xflags = xfs_ip2xflags(ip);
104 buf->bs_extsize_blks = ip->i_extsize;
105 buf->bs_extents = xfs_ifork_nextents(&ip->i_df);
106 xfs_bulkstat_health(ip, buf);
107 buf->bs_aextents = xfs_ifork_nextents(ip->i_afp);
108 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
109 buf->bs_version = XFS_BULKSTAT_VERSION_V5;
111 if (xfs_has_v3inodes(mp)) {
112 buf->bs_btime = ip->i_crtime.tv_sec;
113 buf->bs_btime_nsec = ip->i_crtime.tv_nsec;
114 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
115 buf->bs_cowextsize_blks = ip->i_cowextsize;
118 switch (ip->i_df.if_format) {
119 case XFS_DINODE_FMT_DEV:
120 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
121 buf->bs_blksize = BLKDEV_IOSIZE;
124 case XFS_DINODE_FMT_LOCAL:
126 buf->bs_blksize = mp->m_sb.sb_blocksize;
129 case XFS_DINODE_FMT_EXTENTS:
130 case XFS_DINODE_FMT_BTREE:
132 buf->bs_blksize = mp->m_sb.sb_blocksize;
133 buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
136 xfs_iunlock(ip, XFS_ILOCK_SHARED);
139 error = bc->formatter(bc->breq, buf);
140 if (error == -ECANCELED)
147 * Advance the cursor to the inode that comes after the one we just
148 * looked at. We want the caller to move along if the bulkstat
149 * information was copied successfully; if we tried to grab the inode
150 * but it's no longer allocated; or if it's internal metadata.
152 bc->breq->startino = ino + 1;
157 /* Bulkstat a single inode. */
160 struct xfs_ibulk *breq,
161 bulkstat_one_fmt_pf formatter)
163 struct xfs_bstat_chunk bc = {
164 .formatter = formatter,
167 struct xfs_trans *tp;
170 if (breq->mnt_userns != &init_user_ns) {
171 xfs_warn_ratelimited(breq->mp,
172 "bulkstat not supported inside of idmapped mounts.");
176 ASSERT(breq->icount == 1);
178 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
184 * Grab an empty transaction so that we can use its recursive buffer
185 * locking abilities to detect cycles in the inobt without deadlocking.
187 error = xfs_trans_alloc_empty(breq->mp, &tp);
191 error = xfs_bulkstat_one_int(breq->mp, breq->mnt_userns, tp,
192 breq->startino, &bc);
193 xfs_trans_cancel(tp);
198 * If we reported one inode to userspace then we abort because we hit
199 * the end of the buffer. Don't leak that back to userspace.
201 if (error == -ECANCELED)
209 struct xfs_mount *mp,
210 struct xfs_trans *tp,
214 struct xfs_bstat_chunk *bc = data;
217 error = xfs_bulkstat_one_int(mp, bc->breq->mnt_userns, tp, ino, data);
218 /* bulkstat just skips over missing inodes */
219 if (error == -ENOENT || error == -EINVAL)
225 * Check the incoming lastino parameter.
227 * We allow any inode value that could map to physical space inside the
228 * filesystem because if there are no inodes there, bulkstat moves on to the
229 * next chunk. In other words, the magic agino value of zero takes us to the
230 * first chunk in the AG, and an agino value past the end of the AG takes us to
231 * the first chunk in the next AG.
233 * Therefore we can end early if the requested inode is beyond the end of the
234 * filesystem or doesn't map properly.
237 xfs_bulkstat_already_done(
238 struct xfs_mount *mp,
241 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
242 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);
244 return agno >= mp->m_sb.sb_agcount ||
245 startino != XFS_AGINO_TO_INO(mp, agno, agino);
248 /* Return stat information in bulk (by-inode) for the filesystem. */
251 struct xfs_ibulk *breq,
252 bulkstat_one_fmt_pf formatter)
254 struct xfs_bstat_chunk bc = {
255 .formatter = formatter,
258 struct xfs_trans *tp;
261 if (breq->mnt_userns != &init_user_ns) {
262 xfs_warn_ratelimited(breq->mp,
263 "bulkstat not supported inside of idmapped mounts.");
266 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
269 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
275 * Grab an empty transaction so that we can use its recursive buffer
276 * locking abilities to detect cycles in the inobt without deadlocking.
278 error = xfs_trans_alloc_empty(breq->mp, &tp);
282 error = xfs_iwalk(breq->mp, tp, breq->startino, breq->flags,
283 xfs_bulkstat_iwalk, breq->icount, &bc);
284 xfs_trans_cancel(tp);
289 * We found some inodes, so clear the error status and return them.
290 * The lastino pointer will point directly at the inode that triggered
291 * any error that occurred, so on the next call the error will be
292 * triggered again and propagated to userspace as there will be no
293 * formatted inodes in the buffer.
295 if (breq->ocount > 0)
301 /* Convert bulkstat (v5) to bstat (v1). */
303 xfs_bulkstat_to_bstat(
304 struct xfs_mount *mp,
305 struct xfs_bstat *bs1,
306 const struct xfs_bulkstat *bstat)
308 /* memset is needed here because of padding holes in the structure. */
309 memset(bs1, 0, sizeof(struct xfs_bstat));
310 bs1->bs_ino = bstat->bs_ino;
311 bs1->bs_mode = bstat->bs_mode;
312 bs1->bs_nlink = bstat->bs_nlink;
313 bs1->bs_uid = bstat->bs_uid;
314 bs1->bs_gid = bstat->bs_gid;
315 bs1->bs_rdev = bstat->bs_rdev;
316 bs1->bs_blksize = bstat->bs_blksize;
317 bs1->bs_size = bstat->bs_size;
318 bs1->bs_atime.tv_sec = bstat->bs_atime;
319 bs1->bs_mtime.tv_sec = bstat->bs_mtime;
320 bs1->bs_ctime.tv_sec = bstat->bs_ctime;
321 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
322 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
323 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
324 bs1->bs_blocks = bstat->bs_blocks;
325 bs1->bs_xflags = bstat->bs_xflags;
326 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
327 bs1->bs_extents = bstat->bs_extents;
328 bs1->bs_gen = bstat->bs_gen;
329 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
330 bs1->bs_forkoff = bstat->bs_forkoff;
331 bs1->bs_projid_hi = bstat->bs_projectid >> 16;
332 bs1->bs_sick = bstat->bs_sick;
333 bs1->bs_checked = bstat->bs_checked;
334 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
335 bs1->bs_dmevmask = 0;
337 bs1->bs_aextents = bstat->bs_aextents;
340 struct xfs_inumbers_chunk {
341 inumbers_fmt_pf formatter;
342 struct xfs_ibulk *breq;
348 * This is how we export inode btree records to userspace, so that XFS tools
349 * can figure out where inodes are allocated.
353 * Format the inode group structure and report it somewhere.
355 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
356 * through the filesystem so we move it forward unless there was a runtime
357 * error. If the formatter tells us the buffer is now full we also move the
358 * cursor forward and abort the walk.
362 struct xfs_mount *mp,
363 struct xfs_trans *tp,
365 const struct xfs_inobt_rec_incore *irec,
368 struct xfs_inumbers inogrp = {
369 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
370 .xi_alloccount = irec->ir_count - irec->ir_freecount,
371 .xi_allocmask = ~irec->ir_free,
372 .xi_version = XFS_INUMBERS_VERSION_V5,
374 struct xfs_inumbers_chunk *ic = data;
377 error = ic->formatter(ic->breq, &inogrp);
378 if (error && error != -ECANCELED)
381 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
382 XFS_INODES_PER_CHUNK;
387 * Return inode number table for the filesystem.
391 struct xfs_ibulk *breq,
392 inumbers_fmt_pf formatter)
394 struct xfs_inumbers_chunk ic = {
395 .formatter = formatter,
398 struct xfs_trans *tp;
401 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
405 * Grab an empty transaction so that we can use its recursive buffer
406 * locking abilities to detect cycles in the inobt without deadlocking.
408 error = xfs_trans_alloc_empty(breq->mp, &tp);
412 error = xfs_inobt_walk(breq->mp, tp, breq->startino, breq->flags,
413 xfs_inumbers_walk, breq->icount, &ic);
414 xfs_trans_cancel(tp);
418 * We found some inode groups, so clear the error status and return
419 * them. The lastino pointer will point directly at the inode that
420 * triggered any error that occurred, so on the next call the error
421 * will be triggered again and propagated to userspace as there will be
422 * no formatted inode groups in the buffer.
424 if (breq->ocount > 0)
430 /* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
432 xfs_inumbers_to_inogrp(
433 struct xfs_inogrp *ig1,
434 const struct xfs_inumbers *ig)
436 /* memset is needed here because of padding holes in the structure. */
437 memset(ig1, 0, sizeof(struct xfs_inogrp));
438 ig1->xi_startino = ig->xi_startino;
439 ig1->xi_alloccount = ig->xi_alloccount;
440 ig1->xi_allocmask = ig->xi_allocmask;