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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
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"
23
24/*
25 * Bulk Stat
26 * =========
27 *
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
30 * iteration function.
31 */
32
33struct xfs_bstat_chunk {
34 bulkstat_one_fmt_pf formatter;
35 struct xfs_ibulk *breq;
36 struct xfs_bulkstat *buf;
37};
38
39static inline bool
40want_metadir_file(
41 struct xfs_inode *ip,
42 struct xfs_ibulk *breq)
43{
44 return xfs_is_metadir_inode(ip) && (breq->flags & XFS_IBULK_METADIR);
45}
46
47/*
48 * Fill out the bulkstat info for a single inode and report it somewhere.
49 *
50 * bc->breq->lastino is effectively the inode cursor as we walk through the
51 * filesystem. Therefore, we update it any time we need to move the cursor
52 * forward, regardless of whether or not we're sending any bstat information
53 * back to userspace. If the inode is internal metadata or, has been freed
54 * out from under us, we just simply keep going.
55 *
56 * However, if any other type of error happens we want to stop right where we
57 * are so that userspace will call back with exact number of the bad inode and
58 * we can send back an error code.
59 *
60 * Note that if the formatter tells us there's no space left in the buffer we
61 * move the cursor forward and abort the walk.
62 */
63STATIC int
64xfs_bulkstat_one_int(
65 struct xfs_mount *mp,
66 struct mnt_idmap *idmap,
67 struct xfs_trans *tp,
68 xfs_ino_t ino,
69 struct xfs_bstat_chunk *bc)
70{
71 struct user_namespace *sb_userns = mp->m_super->s_user_ns;
72 struct xfs_inode *ip; /* incore inode pointer */
73 struct inode *inode;
74 struct xfs_bulkstat *buf = bc->buf;
75 xfs_extnum_t nextents;
76 int error = -EINVAL;
77 vfsuid_t vfsuid;
78 vfsgid_t vfsgid;
79
80 error = xfs_iget(mp, tp, ino,
81 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
82 XFS_ILOCK_SHARED, &ip);
83 if (error == -ENOENT || error == -EINVAL)
84 goto out_advance;
85 if (error)
86 goto out;
87
88 /* Reload the incore unlinked list to avoid failure in inodegc. */
89 if (xfs_inode_unlinked_incomplete(ip)) {
90 error = xfs_inode_reload_unlinked_bucket(tp, ip);
91 if (error) {
92 xfs_iunlock(ip, XFS_ILOCK_SHARED);
93 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
94 xfs_irele(ip);
95 return error;
96 }
97 }
98
99 ASSERT(ip != NULL);
100 ASSERT(ip->i_imap.im_blkno != 0);
101 inode = VFS_I(ip);
102 vfsuid = i_uid_into_vfsuid(idmap, inode);
103 vfsgid = i_gid_into_vfsgid(idmap, inode);
104
105 /*
106 * If caller wants files from the metadata directories, push out the
107 * bare minimum information for enabling scrub.
108 */
109 if (want_metadir_file(ip, bc->breq)) {
110 memset(buf, 0, sizeof(*buf));
111 buf->bs_ino = ino;
112 buf->bs_gen = inode->i_generation;
113 buf->bs_mode = inode->i_mode & S_IFMT;
114 xfs_bulkstat_health(ip, buf);
115 buf->bs_version = XFS_BULKSTAT_VERSION_V5;
116 xfs_iunlock(ip, XFS_ILOCK_SHARED);
117 xfs_irele(ip);
118
119 error = bc->formatter(bc->breq, buf);
120 if (!error || error == -ECANCELED)
121 goto out_advance;
122 goto out;
123 }
124
125 /* If this is a private inode, don't leak its details to userspace. */
126 if (IS_PRIVATE(inode) || xfs_is_sb_inum(mp, ino)) {
127 xfs_iunlock(ip, XFS_ILOCK_SHARED);
128 xfs_irele(ip);
129 error = -EINVAL;
130 goto out_advance;
131 }
132
133 /* xfs_iget returns the following without needing
134 * further change.
135 */
136 buf->bs_projectid = ip->i_projid;
137 buf->bs_ino = ino;
138 buf->bs_uid = from_kuid(sb_userns, vfsuid_into_kuid(vfsuid));
139 buf->bs_gid = from_kgid(sb_userns, vfsgid_into_kgid(vfsgid));
140 buf->bs_size = ip->i_disk_size;
141
142 buf->bs_nlink = inode->i_nlink;
143 buf->bs_atime = inode_get_atime_sec(inode);
144 buf->bs_atime_nsec = inode_get_atime_nsec(inode);
145 buf->bs_mtime = inode_get_mtime_sec(inode);
146 buf->bs_mtime_nsec = inode_get_mtime_nsec(inode);
147 buf->bs_ctime = inode_get_ctime_sec(inode);
148 buf->bs_ctime_nsec = inode_get_ctime_nsec(inode);
149 buf->bs_gen = inode->i_generation;
150 buf->bs_mode = inode->i_mode;
151
152 buf->bs_xflags = xfs_ip2xflags(ip);
153 buf->bs_extsize_blks = ip->i_extsize;
154
155 nextents = xfs_ifork_nextents(&ip->i_df);
156 if (!(bc->breq->flags & XFS_IBULK_NREXT64))
157 buf->bs_extents = min(nextents, XFS_MAX_EXTCNT_DATA_FORK_SMALL);
158 else
159 buf->bs_extents64 = nextents;
160
161 xfs_bulkstat_health(ip, buf);
162 buf->bs_aextents = xfs_ifork_nextents(&ip->i_af);
163 buf->bs_forkoff = xfs_inode_fork_boff(ip);
164 buf->bs_version = XFS_BULKSTAT_VERSION_V5;
165
166 if (xfs_has_v3inodes(mp)) {
167 buf->bs_btime = ip->i_crtime.tv_sec;
168 buf->bs_btime_nsec = ip->i_crtime.tv_nsec;
169 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
170 buf->bs_cowextsize_blks = ip->i_cowextsize;
171 }
172
173 switch (ip->i_df.if_format) {
174 case XFS_DINODE_FMT_DEV:
175 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
176 buf->bs_blksize = BLKDEV_IOSIZE;
177 buf->bs_blocks = 0;
178 break;
179 case XFS_DINODE_FMT_LOCAL:
180 buf->bs_rdev = 0;
181 buf->bs_blksize = mp->m_sb.sb_blocksize;
182 buf->bs_blocks = 0;
183 break;
184 case XFS_DINODE_FMT_EXTENTS:
185 case XFS_DINODE_FMT_BTREE:
186 buf->bs_rdev = 0;
187 buf->bs_blksize = mp->m_sb.sb_blocksize;
188 buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
189 break;
190 }
191 xfs_iunlock(ip, XFS_ILOCK_SHARED);
192 xfs_irele(ip);
193
194 error = bc->formatter(bc->breq, buf);
195 if (error == -ECANCELED)
196 goto out_advance;
197 if (error)
198 goto out;
199
200out_advance:
201 /*
202 * Advance the cursor to the inode that comes after the one we just
203 * looked at. We want the caller to move along if the bulkstat
204 * information was copied successfully; if we tried to grab the inode
205 * but it's no longer allocated; or if it's internal metadata.
206 */
207 bc->breq->startino = ino + 1;
208out:
209 return error;
210}
211
212/* Bulkstat a single inode. */
213int
214xfs_bulkstat_one(
215 struct xfs_ibulk *breq,
216 bulkstat_one_fmt_pf formatter)
217{
218 struct xfs_bstat_chunk bc = {
219 .formatter = formatter,
220 .breq = breq,
221 };
222 struct xfs_trans *tp;
223 int error;
224
225 if (breq->idmap != &nop_mnt_idmap) {
226 xfs_warn_ratelimited(breq->mp,
227 "bulkstat not supported inside of idmapped mounts.");
228 return -EINVAL;
229 }
230
231 ASSERT(breq->icount == 1);
232
233 bc.buf = kzalloc(sizeof(struct xfs_bulkstat),
234 GFP_KERNEL | __GFP_RETRY_MAYFAIL);
235 if (!bc.buf)
236 return -ENOMEM;
237
238 /*
239 * Grab an empty transaction so that we can use its recursive buffer
240 * locking abilities to detect cycles in the inobt without deadlocking.
241 */
242 error = xfs_trans_alloc_empty(breq->mp, &tp);
243 if (error)
244 goto out;
245
246 error = xfs_bulkstat_one_int(breq->mp, breq->idmap, tp,
247 breq->startino, &bc);
248 xfs_trans_cancel(tp);
249out:
250 kfree(bc.buf);
251
252 /*
253 * If we reported one inode to userspace then we abort because we hit
254 * the end of the buffer. Don't leak that back to userspace.
255 */
256 if (error == -ECANCELED)
257 error = 0;
258
259 return error;
260}
261
262static int
263xfs_bulkstat_iwalk(
264 struct xfs_mount *mp,
265 struct xfs_trans *tp,
266 xfs_ino_t ino,
267 void *data)
268{
269 struct xfs_bstat_chunk *bc = data;
270 int error;
271
272 error = xfs_bulkstat_one_int(mp, bc->breq->idmap, tp, ino, data);
273 /* bulkstat just skips over missing inodes */
274 if (error == -ENOENT || error == -EINVAL)
275 return 0;
276 return error;
277}
278
279/*
280 * Check the incoming lastino parameter.
281 *
282 * We allow any inode value that could map to physical space inside the
283 * filesystem because if there are no inodes there, bulkstat moves on to the
284 * next chunk. In other words, the magic agino value of zero takes us to the
285 * first chunk in the AG, and an agino value past the end of the AG takes us to
286 * the first chunk in the next AG.
287 *
288 * Therefore we can end early if the requested inode is beyond the end of the
289 * filesystem or doesn't map properly.
290 */
291static inline bool
292xfs_bulkstat_already_done(
293 struct xfs_mount *mp,
294 xfs_ino_t startino)
295{
296 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
297 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);
298
299 return agno >= mp->m_sb.sb_agcount ||
300 startino != XFS_AGINO_TO_INO(mp, agno, agino);
301}
302
303/* Return stat information in bulk (by-inode) for the filesystem. */
304int
305xfs_bulkstat(
306 struct xfs_ibulk *breq,
307 bulkstat_one_fmt_pf formatter)
308{
309 struct xfs_bstat_chunk bc = {
310 .formatter = formatter,
311 .breq = breq,
312 };
313 struct xfs_trans *tp;
314 unsigned int iwalk_flags = 0;
315 int error;
316
317 if (breq->idmap != &nop_mnt_idmap) {
318 xfs_warn_ratelimited(breq->mp,
319 "bulkstat not supported inside of idmapped mounts.");
320 return -EINVAL;
321 }
322 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
323 return 0;
324
325 bc.buf = kzalloc(sizeof(struct xfs_bulkstat),
326 GFP_KERNEL | __GFP_RETRY_MAYFAIL);
327 if (!bc.buf)
328 return -ENOMEM;
329
330 /*
331 * Grab an empty transaction so that we can use its recursive buffer
332 * locking abilities to detect cycles in the inobt without deadlocking.
333 */
334 error = xfs_trans_alloc_empty(breq->mp, &tp);
335 if (error)
336 goto out;
337
338 if (breq->flags & XFS_IBULK_SAME_AG)
339 iwalk_flags |= XFS_IWALK_SAME_AG;
340
341 error = xfs_iwalk(breq->mp, tp, breq->startino, iwalk_flags,
342 xfs_bulkstat_iwalk, breq->icount, &bc);
343 xfs_trans_cancel(tp);
344out:
345 kfree(bc.buf);
346
347 /*
348 * We found some inodes, so clear the error status and return them.
349 * The lastino pointer will point directly at the inode that triggered
350 * any error that occurred, so on the next call the error will be
351 * triggered again and propagated to userspace as there will be no
352 * formatted inodes in the buffer.
353 */
354 if (breq->ocount > 0)
355 error = 0;
356
357 return error;
358}
359
360/* Convert bulkstat (v5) to bstat (v1). */
361void
362xfs_bulkstat_to_bstat(
363 struct xfs_mount *mp,
364 struct xfs_bstat *bs1,
365 const struct xfs_bulkstat *bstat)
366{
367 /* memset is needed here because of padding holes in the structure. */
368 memset(bs1, 0, sizeof(struct xfs_bstat));
369 bs1->bs_ino = bstat->bs_ino;
370 bs1->bs_mode = bstat->bs_mode;
371 bs1->bs_nlink = bstat->bs_nlink;
372 bs1->bs_uid = bstat->bs_uid;
373 bs1->bs_gid = bstat->bs_gid;
374 bs1->bs_rdev = bstat->bs_rdev;
375 bs1->bs_blksize = bstat->bs_blksize;
376 bs1->bs_size = bstat->bs_size;
377 bs1->bs_atime.tv_sec = bstat->bs_atime;
378 bs1->bs_mtime.tv_sec = bstat->bs_mtime;
379 bs1->bs_ctime.tv_sec = bstat->bs_ctime;
380 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
381 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
382 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
383 bs1->bs_blocks = bstat->bs_blocks;
384 bs1->bs_xflags = bstat->bs_xflags;
385 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
386 bs1->bs_extents = bstat->bs_extents;
387 bs1->bs_gen = bstat->bs_gen;
388 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
389 bs1->bs_forkoff = bstat->bs_forkoff;
390 bs1->bs_projid_hi = bstat->bs_projectid >> 16;
391 bs1->bs_sick = bstat->bs_sick;
392 bs1->bs_checked = bstat->bs_checked;
393 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
394 bs1->bs_dmevmask = 0;
395 bs1->bs_dmstate = 0;
396 bs1->bs_aextents = bstat->bs_aextents;
397}
398
399struct xfs_inumbers_chunk {
400 inumbers_fmt_pf formatter;
401 struct xfs_ibulk *breq;
402};
403
404/*
405 * INUMBERS
406 * ========
407 * This is how we export inode btree records to userspace, so that XFS tools
408 * can figure out where inodes are allocated.
409 */
410
411/*
412 * Format the inode group structure and report it somewhere.
413 *
414 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
415 * through the filesystem so we move it forward unless there was a runtime
416 * error. If the formatter tells us the buffer is now full we also move the
417 * cursor forward and abort the walk.
418 */
419STATIC int
420xfs_inumbers_walk(
421 struct xfs_mount *mp,
422 struct xfs_trans *tp,
423 xfs_agnumber_t agno,
424 const struct xfs_inobt_rec_incore *irec,
425 void *data)
426{
427 struct xfs_inumbers inogrp = {
428 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
429 .xi_alloccount = irec->ir_count - irec->ir_freecount,
430 .xi_allocmask = ~irec->ir_free,
431 .xi_version = XFS_INUMBERS_VERSION_V5,
432 };
433 struct xfs_inumbers_chunk *ic = data;
434 int error;
435
436 error = ic->formatter(ic->breq, &inogrp);
437 if (error && error != -ECANCELED)
438 return error;
439
440 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
441 XFS_INODES_PER_CHUNK;
442 return error;
443}
444
445/*
446 * Return inode number table for the filesystem.
447 */
448int
449xfs_inumbers(
450 struct xfs_ibulk *breq,
451 inumbers_fmt_pf formatter)
452{
453 struct xfs_inumbers_chunk ic = {
454 .formatter = formatter,
455 .breq = breq,
456 };
457 struct xfs_trans *tp;
458 int error = 0;
459
460 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
461 return 0;
462
463 /*
464 * Grab an empty transaction so that we can use its recursive buffer
465 * locking abilities to detect cycles in the inobt without deadlocking.
466 */
467 error = xfs_trans_alloc_empty(breq->mp, &tp);
468 if (error)
469 goto out;
470
471 error = xfs_inobt_walk(breq->mp, tp, breq->startino, breq->flags,
472 xfs_inumbers_walk, breq->icount, &ic);
473 xfs_trans_cancel(tp);
474out:
475
476 /*
477 * We found some inode groups, so clear the error status and return
478 * them. The lastino pointer will point directly at the inode that
479 * triggered any error that occurred, so on the next call the error
480 * will be triggered again and propagated to userspace as there will be
481 * no formatted inode groups in the buffer.
482 */
483 if (breq->ocount > 0)
484 error = 0;
485
486 return error;
487}
488
489/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
490void
491xfs_inumbers_to_inogrp(
492 struct xfs_inogrp *ig1,
493 const struct xfs_inumbers *ig)
494{
495 /* memset is needed here because of padding holes in the structure. */
496 memset(ig1, 0, sizeof(struct xfs_inogrp));
497 ig1->xi_startino = ig->xi_startino;
498 ig1->xi_alloccount = ig->xi_alloccount;
499 ig1->xi_allocmask = ig->xi_allocmask;
500}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
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"
23
24/*
25 * Bulk Stat
26 * =========
27 *
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
30 * iteration function.
31 */
32
33struct xfs_bstat_chunk {
34 bulkstat_one_fmt_pf formatter;
35 struct xfs_ibulk *breq;
36 struct xfs_bulkstat *buf;
37};
38
39/*
40 * Fill out the bulkstat info for a single inode and report it somewhere.
41 *
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.
47 *
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.
51 *
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.
54 */
55STATIC int
56xfs_bulkstat_one_int(
57 struct xfs_mount *mp,
58 struct mnt_idmap *idmap,
59 struct xfs_trans *tp,
60 xfs_ino_t ino,
61 struct xfs_bstat_chunk *bc)
62{
63 struct user_namespace *sb_userns = mp->m_super->s_user_ns;
64 struct xfs_inode *ip; /* incore inode pointer */
65 struct inode *inode;
66 struct xfs_bulkstat *buf = bc->buf;
67 xfs_extnum_t nextents;
68 int error = -EINVAL;
69 vfsuid_t vfsuid;
70 vfsgid_t vfsgid;
71
72 if (xfs_internal_inum(mp, ino))
73 goto out_advance;
74
75 error = xfs_iget(mp, tp, ino,
76 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
77 XFS_ILOCK_SHARED, &ip);
78 if (error == -ENOENT || error == -EINVAL)
79 goto out_advance;
80 if (error)
81 goto out;
82
83 /* Reload the incore unlinked list to avoid failure in inodegc. */
84 if (xfs_inode_unlinked_incomplete(ip)) {
85 error = xfs_inode_reload_unlinked_bucket(tp, ip);
86 if (error) {
87 xfs_iunlock(ip, XFS_ILOCK_SHARED);
88 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
89 xfs_irele(ip);
90 return error;
91 }
92 }
93
94 ASSERT(ip != NULL);
95 ASSERT(ip->i_imap.im_blkno != 0);
96 inode = VFS_I(ip);
97 vfsuid = i_uid_into_vfsuid(idmap, inode);
98 vfsgid = i_gid_into_vfsgid(idmap, inode);
99
100 /* xfs_iget returns the following without needing
101 * further change.
102 */
103 buf->bs_projectid = ip->i_projid;
104 buf->bs_ino = ino;
105 buf->bs_uid = from_kuid(sb_userns, vfsuid_into_kuid(vfsuid));
106 buf->bs_gid = from_kgid(sb_userns, vfsgid_into_kgid(vfsgid));
107 buf->bs_size = ip->i_disk_size;
108
109 buf->bs_nlink = inode->i_nlink;
110 buf->bs_atime = inode_get_atime_sec(inode);
111 buf->bs_atime_nsec = inode_get_atime_nsec(inode);
112 buf->bs_mtime = inode_get_mtime_sec(inode);
113 buf->bs_mtime_nsec = inode_get_mtime_nsec(inode);
114 buf->bs_ctime = inode_get_ctime_sec(inode);
115 buf->bs_ctime_nsec = inode_get_ctime_nsec(inode);
116 buf->bs_gen = inode->i_generation;
117 buf->bs_mode = inode->i_mode;
118
119 buf->bs_xflags = xfs_ip2xflags(ip);
120 buf->bs_extsize_blks = ip->i_extsize;
121
122 nextents = xfs_ifork_nextents(&ip->i_df);
123 if (!(bc->breq->flags & XFS_IBULK_NREXT64))
124 buf->bs_extents = min(nextents, XFS_MAX_EXTCNT_DATA_FORK_SMALL);
125 else
126 buf->bs_extents64 = nextents;
127
128 xfs_bulkstat_health(ip, buf);
129 buf->bs_aextents = xfs_ifork_nextents(&ip->i_af);
130 buf->bs_forkoff = xfs_inode_fork_boff(ip);
131 buf->bs_version = XFS_BULKSTAT_VERSION_V5;
132
133 if (xfs_has_v3inodes(mp)) {
134 buf->bs_btime = ip->i_crtime.tv_sec;
135 buf->bs_btime_nsec = ip->i_crtime.tv_nsec;
136 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
137 buf->bs_cowextsize_blks = ip->i_cowextsize;
138 }
139
140 switch (ip->i_df.if_format) {
141 case XFS_DINODE_FMT_DEV:
142 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
143 buf->bs_blksize = BLKDEV_IOSIZE;
144 buf->bs_blocks = 0;
145 break;
146 case XFS_DINODE_FMT_LOCAL:
147 buf->bs_rdev = 0;
148 buf->bs_blksize = mp->m_sb.sb_blocksize;
149 buf->bs_blocks = 0;
150 break;
151 case XFS_DINODE_FMT_EXTENTS:
152 case XFS_DINODE_FMT_BTREE:
153 buf->bs_rdev = 0;
154 buf->bs_blksize = mp->m_sb.sb_blocksize;
155 buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
156 break;
157 }
158 xfs_iunlock(ip, XFS_ILOCK_SHARED);
159 xfs_irele(ip);
160
161 error = bc->formatter(bc->breq, buf);
162 if (error == -ECANCELED)
163 goto out_advance;
164 if (error)
165 goto out;
166
167out_advance:
168 /*
169 * Advance the cursor to the inode that comes after the one we just
170 * looked at. We want the caller to move along if the bulkstat
171 * information was copied successfully; if we tried to grab the inode
172 * but it's no longer allocated; or if it's internal metadata.
173 */
174 bc->breq->startino = ino + 1;
175out:
176 return error;
177}
178
179/* Bulkstat a single inode. */
180int
181xfs_bulkstat_one(
182 struct xfs_ibulk *breq,
183 bulkstat_one_fmt_pf formatter)
184{
185 struct xfs_bstat_chunk bc = {
186 .formatter = formatter,
187 .breq = breq,
188 };
189 struct xfs_trans *tp;
190 int error;
191
192 if (breq->idmap != &nop_mnt_idmap) {
193 xfs_warn_ratelimited(breq->mp,
194 "bulkstat not supported inside of idmapped mounts.");
195 return -EINVAL;
196 }
197
198 ASSERT(breq->icount == 1);
199
200 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
201 KM_MAYFAIL);
202 if (!bc.buf)
203 return -ENOMEM;
204
205 /*
206 * Grab an empty transaction so that we can use its recursive buffer
207 * locking abilities to detect cycles in the inobt without deadlocking.
208 */
209 error = xfs_trans_alloc_empty(breq->mp, &tp);
210 if (error)
211 goto out;
212
213 error = xfs_bulkstat_one_int(breq->mp, breq->idmap, tp,
214 breq->startino, &bc);
215 xfs_trans_cancel(tp);
216out:
217 kmem_free(bc.buf);
218
219 /*
220 * If we reported one inode to userspace then we abort because we hit
221 * the end of the buffer. Don't leak that back to userspace.
222 */
223 if (error == -ECANCELED)
224 error = 0;
225
226 return error;
227}
228
229static int
230xfs_bulkstat_iwalk(
231 struct xfs_mount *mp,
232 struct xfs_trans *tp,
233 xfs_ino_t ino,
234 void *data)
235{
236 struct xfs_bstat_chunk *bc = data;
237 int error;
238
239 error = xfs_bulkstat_one_int(mp, bc->breq->idmap, tp, ino, data);
240 /* bulkstat just skips over missing inodes */
241 if (error == -ENOENT || error == -EINVAL)
242 return 0;
243 return error;
244}
245
246/*
247 * Check the incoming lastino parameter.
248 *
249 * We allow any inode value that could map to physical space inside the
250 * filesystem because if there are no inodes there, bulkstat moves on to the
251 * next chunk. In other words, the magic agino value of zero takes us to the
252 * first chunk in the AG, and an agino value past the end of the AG takes us to
253 * the first chunk in the next AG.
254 *
255 * Therefore we can end early if the requested inode is beyond the end of the
256 * filesystem or doesn't map properly.
257 */
258static inline bool
259xfs_bulkstat_already_done(
260 struct xfs_mount *mp,
261 xfs_ino_t startino)
262{
263 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
264 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);
265
266 return agno >= mp->m_sb.sb_agcount ||
267 startino != XFS_AGINO_TO_INO(mp, agno, agino);
268}
269
270/* Return stat information in bulk (by-inode) for the filesystem. */
271int
272xfs_bulkstat(
273 struct xfs_ibulk *breq,
274 bulkstat_one_fmt_pf formatter)
275{
276 struct xfs_bstat_chunk bc = {
277 .formatter = formatter,
278 .breq = breq,
279 };
280 struct xfs_trans *tp;
281 unsigned int iwalk_flags = 0;
282 int error;
283
284 if (breq->idmap != &nop_mnt_idmap) {
285 xfs_warn_ratelimited(breq->mp,
286 "bulkstat not supported inside of idmapped mounts.");
287 return -EINVAL;
288 }
289 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
290 return 0;
291
292 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
293 KM_MAYFAIL);
294 if (!bc.buf)
295 return -ENOMEM;
296
297 /*
298 * Grab an empty transaction so that we can use its recursive buffer
299 * locking abilities to detect cycles in the inobt without deadlocking.
300 */
301 error = xfs_trans_alloc_empty(breq->mp, &tp);
302 if (error)
303 goto out;
304
305 if (breq->flags & XFS_IBULK_SAME_AG)
306 iwalk_flags |= XFS_IWALK_SAME_AG;
307
308 error = xfs_iwalk(breq->mp, tp, breq->startino, iwalk_flags,
309 xfs_bulkstat_iwalk, breq->icount, &bc);
310 xfs_trans_cancel(tp);
311out:
312 kmem_free(bc.buf);
313
314 /*
315 * We found some inodes, so clear the error status and return them.
316 * The lastino pointer will point directly at the inode that triggered
317 * any error that occurred, so on the next call the error will be
318 * triggered again and propagated to userspace as there will be no
319 * formatted inodes in the buffer.
320 */
321 if (breq->ocount > 0)
322 error = 0;
323
324 return error;
325}
326
327/* Convert bulkstat (v5) to bstat (v1). */
328void
329xfs_bulkstat_to_bstat(
330 struct xfs_mount *mp,
331 struct xfs_bstat *bs1,
332 const struct xfs_bulkstat *bstat)
333{
334 /* memset is needed here because of padding holes in the structure. */
335 memset(bs1, 0, sizeof(struct xfs_bstat));
336 bs1->bs_ino = bstat->bs_ino;
337 bs1->bs_mode = bstat->bs_mode;
338 bs1->bs_nlink = bstat->bs_nlink;
339 bs1->bs_uid = bstat->bs_uid;
340 bs1->bs_gid = bstat->bs_gid;
341 bs1->bs_rdev = bstat->bs_rdev;
342 bs1->bs_blksize = bstat->bs_blksize;
343 bs1->bs_size = bstat->bs_size;
344 bs1->bs_atime.tv_sec = bstat->bs_atime;
345 bs1->bs_mtime.tv_sec = bstat->bs_mtime;
346 bs1->bs_ctime.tv_sec = bstat->bs_ctime;
347 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
348 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
349 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
350 bs1->bs_blocks = bstat->bs_blocks;
351 bs1->bs_xflags = bstat->bs_xflags;
352 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
353 bs1->bs_extents = bstat->bs_extents;
354 bs1->bs_gen = bstat->bs_gen;
355 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
356 bs1->bs_forkoff = bstat->bs_forkoff;
357 bs1->bs_projid_hi = bstat->bs_projectid >> 16;
358 bs1->bs_sick = bstat->bs_sick;
359 bs1->bs_checked = bstat->bs_checked;
360 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
361 bs1->bs_dmevmask = 0;
362 bs1->bs_dmstate = 0;
363 bs1->bs_aextents = bstat->bs_aextents;
364}
365
366struct xfs_inumbers_chunk {
367 inumbers_fmt_pf formatter;
368 struct xfs_ibulk *breq;
369};
370
371/*
372 * INUMBERS
373 * ========
374 * This is how we export inode btree records to userspace, so that XFS tools
375 * can figure out where inodes are allocated.
376 */
377
378/*
379 * Format the inode group structure and report it somewhere.
380 *
381 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
382 * through the filesystem so we move it forward unless there was a runtime
383 * error. If the formatter tells us the buffer is now full we also move the
384 * cursor forward and abort the walk.
385 */
386STATIC int
387xfs_inumbers_walk(
388 struct xfs_mount *mp,
389 struct xfs_trans *tp,
390 xfs_agnumber_t agno,
391 const struct xfs_inobt_rec_incore *irec,
392 void *data)
393{
394 struct xfs_inumbers inogrp = {
395 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
396 .xi_alloccount = irec->ir_count - irec->ir_freecount,
397 .xi_allocmask = ~irec->ir_free,
398 .xi_version = XFS_INUMBERS_VERSION_V5,
399 };
400 struct xfs_inumbers_chunk *ic = data;
401 int error;
402
403 error = ic->formatter(ic->breq, &inogrp);
404 if (error && error != -ECANCELED)
405 return error;
406
407 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
408 XFS_INODES_PER_CHUNK;
409 return error;
410}
411
412/*
413 * Return inode number table for the filesystem.
414 */
415int
416xfs_inumbers(
417 struct xfs_ibulk *breq,
418 inumbers_fmt_pf formatter)
419{
420 struct xfs_inumbers_chunk ic = {
421 .formatter = formatter,
422 .breq = breq,
423 };
424 struct xfs_trans *tp;
425 int error = 0;
426
427 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
428 return 0;
429
430 /*
431 * Grab an empty transaction so that we can use its recursive buffer
432 * locking abilities to detect cycles in the inobt without deadlocking.
433 */
434 error = xfs_trans_alloc_empty(breq->mp, &tp);
435 if (error)
436 goto out;
437
438 error = xfs_inobt_walk(breq->mp, tp, breq->startino, breq->flags,
439 xfs_inumbers_walk, breq->icount, &ic);
440 xfs_trans_cancel(tp);
441out:
442
443 /*
444 * We found some inode groups, so clear the error status and return
445 * them. The lastino pointer will point directly at the inode that
446 * triggered any error that occurred, so on the next call the error
447 * will be triggered again and propagated to userspace as there will be
448 * no formatted inode groups in the buffer.
449 */
450 if (breq->ocount > 0)
451 error = 0;
452
453 return error;
454}
455
456/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
457void
458xfs_inumbers_to_inogrp(
459 struct xfs_inogrp *ig1,
460 const struct xfs_inumbers *ig)
461{
462 /* memset is needed here because of padding holes in the structure. */
463 memset(ig1, 0, sizeof(struct xfs_inogrp));
464 ig1->xi_startino = ig->xi_startino;
465 ig1->xi_alloccount = ig->xi_alloccount;
466 ig1->xi_allocmask = ig->xi_allocmask;
467}