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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
23/*
24 * Bulk Stat
25 * =========
26 *
27 * Use the inode walking functions to fill out struct xfs_bulkstat for every
28 * allocated inode, then pass the stat information to some externally provided
29 * iteration function.
30 */
31
32struct xfs_bstat_chunk {
33 bulkstat_one_fmt_pf formatter;
34 struct xfs_ibulk *breq;
35 struct xfs_bulkstat *buf;
36};
37
38/*
39 * Fill out the bulkstat info for a single inode and report it somewhere.
40 *
41 * bc->breq->lastino is effectively the inode cursor as we walk through the
42 * filesystem. Therefore, we update it any time we need to move the cursor
43 * forward, regardless of whether or not we're sending any bstat information
44 * back to userspace. If the inode is internal metadata or, has been freed
45 * out from under us, we just simply keep going.
46 *
47 * However, if any other type of error happens we want to stop right where we
48 * are so that userspace will call back with exact number of the bad inode and
49 * we can send back an error code.
50 *
51 * Note that if the formatter tells us there's no space left in the buffer we
52 * move the cursor forward and abort the walk.
53 */
54STATIC int
55xfs_bulkstat_one_int(
56 struct xfs_mount *mp,
57 struct user_namespace *mnt_userns,
58 struct xfs_trans *tp,
59 xfs_ino_t ino,
60 struct xfs_bstat_chunk *bc)
61{
62 struct user_namespace *sb_userns = mp->m_super->s_user_ns;
63 struct xfs_inode *ip; /* incore inode pointer */
64 struct inode *inode;
65 struct xfs_bulkstat *buf = bc->buf;
66 int error = -EINVAL;
67
68 if (xfs_internal_inum(mp, ino))
69 goto out_advance;
70
71 error = xfs_iget(mp, tp, ino,
72 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
73 XFS_ILOCK_SHARED, &ip);
74 if (error == -ENOENT || error == -EINVAL)
75 goto out_advance;
76 if (error)
77 goto out;
78
79 ASSERT(ip != NULL);
80 ASSERT(ip->i_imap.im_blkno != 0);
81 inode = VFS_I(ip);
82
83 /* xfs_iget returns the following without needing
84 * further change.
85 */
86 buf->bs_projectid = ip->i_projid;
87 buf->bs_ino = ino;
88 buf->bs_uid = from_kuid(sb_userns, i_uid_into_mnt(mnt_userns, inode));
89 buf->bs_gid = from_kgid(sb_userns, i_gid_into_mnt(mnt_userns, inode));
90 buf->bs_size = ip->i_disk_size;
91
92 buf->bs_nlink = inode->i_nlink;
93 buf->bs_atime = inode->i_atime.tv_sec;
94 buf->bs_atime_nsec = inode->i_atime.tv_nsec;
95 buf->bs_mtime = inode->i_mtime.tv_sec;
96 buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
97 buf->bs_ctime = inode->i_ctime.tv_sec;
98 buf->bs_ctime_nsec = inode->i_ctime.tv_nsec;
99 buf->bs_gen = inode->i_generation;
100 buf->bs_mode = inode->i_mode;
101
102 buf->bs_xflags = xfs_ip2xflags(ip);
103 buf->bs_extsize_blks = ip->i_extsize;
104 buf->bs_extents = xfs_ifork_nextents(&ip->i_df);
105 xfs_bulkstat_health(ip, buf);
106 buf->bs_aextents = xfs_ifork_nextents(ip->i_afp);
107 buf->bs_forkoff = XFS_IFORK_BOFF(ip);
108 buf->bs_version = XFS_BULKSTAT_VERSION_V5;
109
110 if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
111 buf->bs_btime = ip->i_crtime.tv_sec;
112 buf->bs_btime_nsec = ip->i_crtime.tv_nsec;
113 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
114 buf->bs_cowextsize_blks = ip->i_cowextsize;
115 }
116
117 switch (ip->i_df.if_format) {
118 case XFS_DINODE_FMT_DEV:
119 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
120 buf->bs_blksize = BLKDEV_IOSIZE;
121 buf->bs_blocks = 0;
122 break;
123 case XFS_DINODE_FMT_LOCAL:
124 buf->bs_rdev = 0;
125 buf->bs_blksize = mp->m_sb.sb_blocksize;
126 buf->bs_blocks = 0;
127 break;
128 case XFS_DINODE_FMT_EXTENTS:
129 case XFS_DINODE_FMT_BTREE:
130 buf->bs_rdev = 0;
131 buf->bs_blksize = mp->m_sb.sb_blocksize;
132 buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
133 break;
134 }
135 xfs_iunlock(ip, XFS_ILOCK_SHARED);
136 xfs_irele(ip);
137
138 error = bc->formatter(bc->breq, buf);
139 if (error == -ECANCELED)
140 goto out_advance;
141 if (error)
142 goto out;
143
144out_advance:
145 /*
146 * Advance the cursor to the inode that comes after the one we just
147 * looked at. We want the caller to move along if the bulkstat
148 * information was copied successfully; if we tried to grab the inode
149 * but it's no longer allocated; or if it's internal metadata.
150 */
151 bc->breq->startino = ino + 1;
152out:
153 return error;
154}
155
156/* Bulkstat a single inode. */
157int
158xfs_bulkstat_one(
159 struct xfs_ibulk *breq,
160 bulkstat_one_fmt_pf formatter)
161{
162 struct xfs_bstat_chunk bc = {
163 .formatter = formatter,
164 .breq = breq,
165 };
166 int error;
167
168 if (breq->mnt_userns != &init_user_ns) {
169 xfs_warn_ratelimited(breq->mp,
170 "bulkstat not supported inside of idmapped mounts.");
171 return -EINVAL;
172 }
173
174 ASSERT(breq->icount == 1);
175
176 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
177 KM_MAYFAIL);
178 if (!bc.buf)
179 return -ENOMEM;
180
181 error = xfs_bulkstat_one_int(breq->mp, breq->mnt_userns, NULL,
182 breq->startino, &bc);
183
184 kmem_free(bc.buf);
185
186 /*
187 * If we reported one inode to userspace then we abort because we hit
188 * the end of the buffer. Don't leak that back to userspace.
189 */
190 if (error == -ECANCELED)
191 error = 0;
192
193 return error;
194}
195
196static int
197xfs_bulkstat_iwalk(
198 struct xfs_mount *mp,
199 struct xfs_trans *tp,
200 xfs_ino_t ino,
201 void *data)
202{
203 struct xfs_bstat_chunk *bc = data;
204 int error;
205
206 error = xfs_bulkstat_one_int(mp, bc->breq->mnt_userns, tp, ino, data);
207 /* bulkstat just skips over missing inodes */
208 if (error == -ENOENT || error == -EINVAL)
209 return 0;
210 return error;
211}
212
213/*
214 * Check the incoming lastino parameter.
215 *
216 * We allow any inode value that could map to physical space inside the
217 * filesystem because if there are no inodes there, bulkstat moves on to the
218 * next chunk. In other words, the magic agino value of zero takes us to the
219 * first chunk in the AG, and an agino value past the end of the AG takes us to
220 * the first chunk in the next AG.
221 *
222 * Therefore we can end early if the requested inode is beyond the end of the
223 * filesystem or doesn't map properly.
224 */
225static inline bool
226xfs_bulkstat_already_done(
227 struct xfs_mount *mp,
228 xfs_ino_t startino)
229{
230 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
231 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);
232
233 return agno >= mp->m_sb.sb_agcount ||
234 startino != XFS_AGINO_TO_INO(mp, agno, agino);
235}
236
237/* Return stat information in bulk (by-inode) for the filesystem. */
238int
239xfs_bulkstat(
240 struct xfs_ibulk *breq,
241 bulkstat_one_fmt_pf formatter)
242{
243 struct xfs_bstat_chunk bc = {
244 .formatter = formatter,
245 .breq = breq,
246 };
247 int error;
248
249 if (breq->mnt_userns != &init_user_ns) {
250 xfs_warn_ratelimited(breq->mp,
251 "bulkstat not supported inside of idmapped mounts.");
252 return -EINVAL;
253 }
254 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
255 return 0;
256
257 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
258 KM_MAYFAIL);
259 if (!bc.buf)
260 return -ENOMEM;
261
262 error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags,
263 xfs_bulkstat_iwalk, breq->icount, &bc);
264
265 kmem_free(bc.buf);
266
267 /*
268 * We found some inodes, so clear the error status and return them.
269 * The lastino pointer will point directly at the inode that triggered
270 * any error that occurred, so on the next call the error will be
271 * triggered again and propagated to userspace as there will be no
272 * formatted inodes in the buffer.
273 */
274 if (breq->ocount > 0)
275 error = 0;
276
277 return error;
278}
279
280/* Convert bulkstat (v5) to bstat (v1). */
281void
282xfs_bulkstat_to_bstat(
283 struct xfs_mount *mp,
284 struct xfs_bstat *bs1,
285 const struct xfs_bulkstat *bstat)
286{
287 /* memset is needed here because of padding holes in the structure. */
288 memset(bs1, 0, sizeof(struct xfs_bstat));
289 bs1->bs_ino = bstat->bs_ino;
290 bs1->bs_mode = bstat->bs_mode;
291 bs1->bs_nlink = bstat->bs_nlink;
292 bs1->bs_uid = bstat->bs_uid;
293 bs1->bs_gid = bstat->bs_gid;
294 bs1->bs_rdev = bstat->bs_rdev;
295 bs1->bs_blksize = bstat->bs_blksize;
296 bs1->bs_size = bstat->bs_size;
297 bs1->bs_atime.tv_sec = bstat->bs_atime;
298 bs1->bs_mtime.tv_sec = bstat->bs_mtime;
299 bs1->bs_ctime.tv_sec = bstat->bs_ctime;
300 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
301 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
302 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
303 bs1->bs_blocks = bstat->bs_blocks;
304 bs1->bs_xflags = bstat->bs_xflags;
305 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
306 bs1->bs_extents = bstat->bs_extents;
307 bs1->bs_gen = bstat->bs_gen;
308 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
309 bs1->bs_forkoff = bstat->bs_forkoff;
310 bs1->bs_projid_hi = bstat->bs_projectid >> 16;
311 bs1->bs_sick = bstat->bs_sick;
312 bs1->bs_checked = bstat->bs_checked;
313 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
314 bs1->bs_dmevmask = 0;
315 bs1->bs_dmstate = 0;
316 bs1->bs_aextents = bstat->bs_aextents;
317}
318
319struct xfs_inumbers_chunk {
320 inumbers_fmt_pf formatter;
321 struct xfs_ibulk *breq;
322};
323
324/*
325 * INUMBERS
326 * ========
327 * This is how we export inode btree records to userspace, so that XFS tools
328 * can figure out where inodes are allocated.
329 */
330
331/*
332 * Format the inode group structure and report it somewhere.
333 *
334 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
335 * through the filesystem so we move it forward unless there was a runtime
336 * error. If the formatter tells us the buffer is now full we also move the
337 * cursor forward and abort the walk.
338 */
339STATIC int
340xfs_inumbers_walk(
341 struct xfs_mount *mp,
342 struct xfs_trans *tp,
343 xfs_agnumber_t agno,
344 const struct xfs_inobt_rec_incore *irec,
345 void *data)
346{
347 struct xfs_inumbers inogrp = {
348 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
349 .xi_alloccount = irec->ir_count - irec->ir_freecount,
350 .xi_allocmask = ~irec->ir_free,
351 .xi_version = XFS_INUMBERS_VERSION_V5,
352 };
353 struct xfs_inumbers_chunk *ic = data;
354 int error;
355
356 error = ic->formatter(ic->breq, &inogrp);
357 if (error && error != -ECANCELED)
358 return error;
359
360 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
361 XFS_INODES_PER_CHUNK;
362 return error;
363}
364
365/*
366 * Return inode number table for the filesystem.
367 */
368int
369xfs_inumbers(
370 struct xfs_ibulk *breq,
371 inumbers_fmt_pf formatter)
372{
373 struct xfs_inumbers_chunk ic = {
374 .formatter = formatter,
375 .breq = breq,
376 };
377 int error = 0;
378
379 if (xfs_bulkstat_already_done(breq->mp, breq->startino))
380 return 0;
381
382 error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags,
383 xfs_inumbers_walk, breq->icount, &ic);
384
385 /*
386 * We found some inode groups, so clear the error status and return
387 * them. The lastino pointer will point directly at the inode that
388 * triggered any error that occurred, so on the next call the error
389 * will be triggered again and propagated to userspace as there will be
390 * no formatted inode groups in the buffer.
391 */
392 if (breq->ocount > 0)
393 error = 0;
394
395 return error;
396}
397
398/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
399void
400xfs_inumbers_to_inogrp(
401 struct xfs_inogrp *ig1,
402 const struct xfs_inumbers *ig)
403{
404 /* memset is needed here because of padding holes in the structure. */
405 memset(ig1, 0, sizeof(struct xfs_inogrp));
406 ig1->xi_startino = ig->xi_startino;
407 ig1->xi_alloccount = ig->xi_alloccount;
408 ig1->xi_allocmask = ig->xi_allocmask;
409}
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}