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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
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 user_namespace *mnt_userns,
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 ASSERT(ip != NULL);
84 ASSERT(ip->i_imap.im_blkno != 0);
85 inode = VFS_I(ip);
86 vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
87 vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
88
89 /* xfs_iget returns the following without needing
90 * further change.
91 */
92 buf->bs_projectid = ip->i_projid;
93 buf->bs_ino = ino;
94 buf->bs_uid = from_kuid(sb_userns, vfsuid_into_kuid(vfsuid));
95 buf->bs_gid = from_kgid(sb_userns, vfsgid_into_kgid(vfsgid));
96 buf->bs_size = ip->i_disk_size;
97
98 buf->bs_nlink = inode->i_nlink;
99 buf->bs_atime = inode->i_atime.tv_sec;
100 buf->bs_atime_nsec = inode->i_atime.tv_nsec;
101 buf->bs_mtime = inode->i_mtime.tv_sec;
102 buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
103 buf->bs_ctime = inode->i_ctime.tv_sec;
104 buf->bs_ctime_nsec = inode->i_ctime.tv_nsec;
105 buf->bs_gen = inode->i_generation;
106 buf->bs_mode = inode->i_mode;
107
108 buf->bs_xflags = xfs_ip2xflags(ip);
109 buf->bs_extsize_blks = ip->i_extsize;
110
111 nextents = xfs_ifork_nextents(&ip->i_df);
112 if (!(bc->breq->flags & XFS_IBULK_NREXT64))
113 buf->bs_extents = min(nextents, XFS_MAX_EXTCNT_DATA_FORK_SMALL);
114 else
115 buf->bs_extents64 = nextents;
116
117 xfs_bulkstat_health(ip, buf);
118 buf->bs_aextents = xfs_ifork_nextents(&ip->i_af);
119 buf->bs_forkoff = xfs_inode_fork_boff(ip);
120 buf->bs_version = XFS_BULKSTAT_VERSION_V5;
121
122 if (xfs_has_v3inodes(mp)) {
123 buf->bs_btime = ip->i_crtime.tv_sec;
124 buf->bs_btime_nsec = ip->i_crtime.tv_nsec;
125 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
126 buf->bs_cowextsize_blks = ip->i_cowextsize;
127 }
128
129 switch (ip->i_df.if_format) {
130 case XFS_DINODE_FMT_DEV:
131 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
132 buf->bs_blksize = BLKDEV_IOSIZE;
133 buf->bs_blocks = 0;
134 break;
135 case XFS_DINODE_FMT_LOCAL:
136 buf->bs_rdev = 0;
137 buf->bs_blksize = mp->m_sb.sb_blocksize;
138 buf->bs_blocks = 0;
139 break;
140 case XFS_DINODE_FMT_EXTENTS:
141 case XFS_DINODE_FMT_BTREE:
142 buf->bs_rdev = 0;
143 buf->bs_blksize = mp->m_sb.sb_blocksize;
144 buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
145 break;
146 }
147 xfs_iunlock(ip, XFS_ILOCK_SHARED);
148 xfs_irele(ip);
149
150 error = bc->formatter(bc->breq, buf);
151 if (error == -ECANCELED)
152 goto out_advance;
153 if (error)
154 goto out;
155
156out_advance:
157 /*
158 * Advance the cursor to the inode that comes after the one we just
159 * looked at. We want the caller to move along if the bulkstat
160 * information was copied successfully; if we tried to grab the inode
161 * but it's no longer allocated; or if it's internal metadata.
162 */
163 bc->breq->startino = ino + 1;
164out:
165 return error;
166}
167
168/* Bulkstat a single inode. */
169int
170xfs_bulkstat_one(
171 struct xfs_ibulk *breq,
172 bulkstat_one_fmt_pf formatter)
173{
174 struct xfs_bstat_chunk bc = {
175 .formatter = formatter,
176 .breq = breq,
177 };
178 struct xfs_trans *tp;
179 int error;
180
181 if (breq->mnt_userns != &init_user_ns) {
182 xfs_warn_ratelimited(breq->mp,
183 "bulkstat not supported inside of idmapped mounts.");
184 return -EINVAL;
185 }
186
187 ASSERT(breq->icount == 1);
188
189 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
190 KM_MAYFAIL);
191 if (!bc.buf)
192 return -ENOMEM;
193
194 /*
195 * Grab an empty transaction so that we can use its recursive buffer
196 * locking abilities to detect cycles in the inobt without deadlocking.
197 */
198 error = xfs_trans_alloc_empty(breq->mp, &tp);
199 if (error)
200 goto out;
201
202 error = xfs_bulkstat_one_int(breq->mp, breq->mnt_userns, tp,
203 breq->startino, &bc);
204 xfs_trans_cancel(tp);
205out:
206 kmem_free(bc.buf);
207
208 /*
209 * If we reported one inode to userspace then we abort because we hit
210 * the end of the buffer. Don't leak that back to userspace.
211 */
212 if (error == -ECANCELED)
213 error = 0;
214
215 return error;
216}
217
218static int
219xfs_bulkstat_iwalk(
220 struct xfs_mount *mp,
221 struct xfs_trans *tp,
222 xfs_ino_t ino,
223 void *data)
224{
225 struct xfs_bstat_chunk *bc = data;
226 int error;
227
228 error = xfs_bulkstat_one_int(mp, bc->breq->mnt_userns, tp, ino, data);
229 /* bulkstat just skips over missing inodes */
230 if (error == -ENOENT || error == -EINVAL)
231 return 0;
232 return error;
233}
234
235/*
236 * Check the incoming lastino parameter.
237 *
238 * We allow any inode value that could map to physical space inside the
239 * filesystem because if there are no inodes there, bulkstat moves on to the
240 * next chunk. In other words, the magic agino value of zero takes us to the
241 * first chunk in the AG, and an agino value past the end of the AG takes us to
242 * the first chunk in the next AG.
243 *
244 * Therefore we can end early if the requested inode is beyond the end of the
245 * filesystem or doesn't map properly.
246 */
247static inline bool
248xfs_bulkstat_already_done(
249 struct xfs_mount *mp,
250 xfs_ino_t startino)
251{
252 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
253 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);
254
255 return agno >= mp->m_sb.sb_agcount ||
256 startino != XFS_AGINO_TO_INO(mp, agno, agino);
257}
258
259/* Return stat information in bulk (by-inode) for the filesystem. */
260int
261xfs_bulkstat(
262 struct xfs_ibulk *breq,
263 bulkstat_one_fmt_pf formatter)
264{
265 struct xfs_bstat_chunk bc = {
266 .formatter = formatter,
267 .breq = breq,
268 };
269 struct xfs_trans *tp;
270 unsigned int iwalk_flags = 0;
271 int error;
272
273 if (breq->mnt_userns != &init_user_ns) {
274 xfs_warn_ratelimited(breq->mp,
275 "bulkstat not supported inside of idmapped mounts.");
276 return -EINVAL;
277 }
278 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
279 return 0;
280
281 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
282 KM_MAYFAIL);
283 if (!bc.buf)
284 return -ENOMEM;
285
286 /*
287 * Grab an empty transaction so that we can use its recursive buffer
288 * locking abilities to detect cycles in the inobt without deadlocking.
289 */
290 error = xfs_trans_alloc_empty(breq->mp, &tp);
291 if (error)
292 goto out;
293
294 if (breq->flags & XFS_IBULK_SAME_AG)
295 iwalk_flags |= XFS_IWALK_SAME_AG;
296
297 error = xfs_iwalk(breq->mp, tp, breq->startino, iwalk_flags,
298 xfs_bulkstat_iwalk, breq->icount, &bc);
299 xfs_trans_cancel(tp);
300out:
301 kmem_free(bc.buf);
302
303 /*
304 * We found some inodes, so clear the error status and return them.
305 * The lastino pointer will point directly at the inode that triggered
306 * any error that occurred, so on the next call the error will be
307 * triggered again and propagated to userspace as there will be no
308 * formatted inodes in the buffer.
309 */
310 if (breq->ocount > 0)
311 error = 0;
312
313 return error;
314}
315
316/* Convert bulkstat (v5) to bstat (v1). */
317void
318xfs_bulkstat_to_bstat(
319 struct xfs_mount *mp,
320 struct xfs_bstat *bs1,
321 const struct xfs_bulkstat *bstat)
322{
323 /* memset is needed here because of padding holes in the structure. */
324 memset(bs1, 0, sizeof(struct xfs_bstat));
325 bs1->bs_ino = bstat->bs_ino;
326 bs1->bs_mode = bstat->bs_mode;
327 bs1->bs_nlink = bstat->bs_nlink;
328 bs1->bs_uid = bstat->bs_uid;
329 bs1->bs_gid = bstat->bs_gid;
330 bs1->bs_rdev = bstat->bs_rdev;
331 bs1->bs_blksize = bstat->bs_blksize;
332 bs1->bs_size = bstat->bs_size;
333 bs1->bs_atime.tv_sec = bstat->bs_atime;
334 bs1->bs_mtime.tv_sec = bstat->bs_mtime;
335 bs1->bs_ctime.tv_sec = bstat->bs_ctime;
336 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
337 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
338 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
339 bs1->bs_blocks = bstat->bs_blocks;
340 bs1->bs_xflags = bstat->bs_xflags;
341 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
342 bs1->bs_extents = bstat->bs_extents;
343 bs1->bs_gen = bstat->bs_gen;
344 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
345 bs1->bs_forkoff = bstat->bs_forkoff;
346 bs1->bs_projid_hi = bstat->bs_projectid >> 16;
347 bs1->bs_sick = bstat->bs_sick;
348 bs1->bs_checked = bstat->bs_checked;
349 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
350 bs1->bs_dmevmask = 0;
351 bs1->bs_dmstate = 0;
352 bs1->bs_aextents = bstat->bs_aextents;
353}
354
355struct xfs_inumbers_chunk {
356 inumbers_fmt_pf formatter;
357 struct xfs_ibulk *breq;
358};
359
360/*
361 * INUMBERS
362 * ========
363 * This is how we export inode btree records to userspace, so that XFS tools
364 * can figure out where inodes are allocated.
365 */
366
367/*
368 * Format the inode group structure and report it somewhere.
369 *
370 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
371 * through the filesystem so we move it forward unless there was a runtime
372 * error. If the formatter tells us the buffer is now full we also move the
373 * cursor forward and abort the walk.
374 */
375STATIC int
376xfs_inumbers_walk(
377 struct xfs_mount *mp,
378 struct xfs_trans *tp,
379 xfs_agnumber_t agno,
380 const struct xfs_inobt_rec_incore *irec,
381 void *data)
382{
383 struct xfs_inumbers inogrp = {
384 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
385 .xi_alloccount = irec->ir_count - irec->ir_freecount,
386 .xi_allocmask = ~irec->ir_free,
387 .xi_version = XFS_INUMBERS_VERSION_V5,
388 };
389 struct xfs_inumbers_chunk *ic = data;
390 int error;
391
392 error = ic->formatter(ic->breq, &inogrp);
393 if (error && error != -ECANCELED)
394 return error;
395
396 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
397 XFS_INODES_PER_CHUNK;
398 return error;
399}
400
401/*
402 * Return inode number table for the filesystem.
403 */
404int
405xfs_inumbers(
406 struct xfs_ibulk *breq,
407 inumbers_fmt_pf formatter)
408{
409 struct xfs_inumbers_chunk ic = {
410 .formatter = formatter,
411 .breq = breq,
412 };
413 struct xfs_trans *tp;
414 int error = 0;
415
416 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
417 return 0;
418
419 /*
420 * Grab an empty transaction so that we can use its recursive buffer
421 * locking abilities to detect cycles in the inobt without deadlocking.
422 */
423 error = xfs_trans_alloc_empty(breq->mp, &tp);
424 if (error)
425 goto out;
426
427 error = xfs_inobt_walk(breq->mp, tp, breq->startino, breq->flags,
428 xfs_inumbers_walk, breq->icount, &ic);
429 xfs_trans_cancel(tp);
430out:
431
432 /*
433 * We found some inode groups, so clear the error status and return
434 * them. The lastino pointer will point directly at the inode that
435 * triggered any error that occurred, so on the next call the error
436 * will be triggered again and propagated to userspace as there will be
437 * no formatted inode groups in the buffer.
438 */
439 if (breq->ocount > 0)
440 error = 0;
441
442 return error;
443}
444
445/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
446void
447xfs_inumbers_to_inogrp(
448 struct xfs_inogrp *ig1,
449 const struct xfs_inumbers *ig)
450{
451 /* memset is needed here because of padding holes in the structure. */
452 memset(ig1, 0, sizeof(struct xfs_inogrp));
453 ig1->xi_startino = ig->xi_startino;
454 ig1->xi_alloccount = ig->xi_alloccount;
455 ig1->xi_allocmask = ig->xi_allocmask;
456}
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}