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authorDarrick J. Wong <darrick.wong@oracle.com>2017-04-30 00:36:53 -0400
committerTheodore Ts'o <tytso@mit.edu>2017-04-30 00:36:53 -0400
commit0c9ec4beecac94cb450c8abb2ac8b7e8a79240ea (patch)
tree95dec5ec2bd1b53c425c29bc98e7506e41e4747e
parentd0649f0416feb616d34d15e541716cb8a555e899 (diff)
ext4: support GETFSMAP ioctls
Support the GETFSMAP ioctls so that we can use the xfs free space management tools to probe ext4 as well. Note that this is a partial implementation -- we only report fixed-location metadata and free space; everything else is reported as "unknown". Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat
-rw-r--r--fs/ext4/Makefile10
-rw-r--r--fs/ext4/fsmap.c722
-rw-r--r--fs/ext4/fsmap.h69
-rw-r--r--fs/ext4/ioctl.c90
-rw-r--r--fs/ext4/mballoc.c49
-rw-r--r--fs/ext4/mballoc.h17
-rw-r--r--fs/ext4/super.c1
-rw-r--r--include/trace/events/ext4.h74
8 files changed, 1027 insertions, 5 deletions
diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
index 354103f3490c..d9beca1653c5 100644
--- a/fs/ext4/Makefile
+++ b/fs/ext4/Makefile
@@ -4,11 +4,11 @@
4 4
5obj-$(CONFIG_EXT4_FS) += ext4.o 5obj-$(CONFIG_EXT4_FS) += ext4.o
6 6
7ext4-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o page-io.o \ 7ext4-y := balloc.o bitmap.o block_validity.o dir.o ext4_jbd2.o extents.o \
8 ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \ 8 extents_status.o file.o fsmap.o fsync.o hash.o ialloc.o \
9 ext4_jbd2.o migrate.o mballoc.o block_validity.o move_extent.o \ 9 indirect.o inline.o inode.o ioctl.o mballoc.o migrate.o \
10 mmp.o indirect.o extents_status.o xattr.o xattr_user.o \ 10 mmp.o move_extent.o namei.o page-io.o readpage.o resize.o \
11 xattr_trusted.o inline.o readpage.o sysfs.o 11 super.o symlink.o sysfs.o xattr.o xattr_trusted.o xattr_user.o
12 12
13ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o 13ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o
14ext4-$(CONFIG_EXT4_FS_SECURITY) += xattr_security.o 14ext4-$(CONFIG_EXT4_FS_SECURITY) += xattr_security.o
diff --git a/fs/ext4/fsmap.c b/fs/ext4/fsmap.c
new file mode 100644
index 000000000000..b19436098837
--- /dev/null
+++ b/fs/ext4/fsmap.c
@@ -0,0 +1,722 @@
1/*
2 * Copyright (C) 2017 Oracle. All Rights Reserved.
3 *
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it would be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20#include "ext4.h"
21#include <linux/fsmap.h>
22#include "fsmap.h"
23#include "mballoc.h"
24#include <linux/sort.h>
25#include <linux/list_sort.h>
26#include <trace/events/ext4.h>
27
28/* Convert an ext4_fsmap to an fsmap. */
29void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest,
30 struct ext4_fsmap *src)
31{
32 dest->fmr_device = src->fmr_device;
33 dest->fmr_flags = src->fmr_flags;
34 dest->fmr_physical = src->fmr_physical << sb->s_blocksize_bits;
35 dest->fmr_owner = src->fmr_owner;
36 dest->fmr_offset = 0;
37 dest->fmr_length = src->fmr_length << sb->s_blocksize_bits;
38 dest->fmr_reserved[0] = 0;
39 dest->fmr_reserved[1] = 0;
40 dest->fmr_reserved[2] = 0;
41}
42
43/* Convert an fsmap to an ext4_fsmap. */
44void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest,
45 struct fsmap *src)
46{
47 dest->fmr_device = src->fmr_device;
48 dest->fmr_flags = src->fmr_flags;
49 dest->fmr_physical = src->fmr_physical >> sb->s_blocksize_bits;
50 dest->fmr_owner = src->fmr_owner;
51 dest->fmr_length = src->fmr_length >> sb->s_blocksize_bits;
52}
53
54/* getfsmap query state */
55struct ext4_getfsmap_info {
56 struct ext4_fsmap_head *gfi_head;
57 ext4_fsmap_format_t gfi_formatter; /* formatting fn */
58 void *gfi_format_arg;/* format buffer */
59 ext4_fsblk_t gfi_next_fsblk; /* next fsblock we expect */
60 u32 gfi_dev; /* device id */
61 ext4_group_t gfi_agno; /* bg number, if applicable */
62 struct ext4_fsmap gfi_low; /* low rmap key */
63 struct ext4_fsmap gfi_high; /* high rmap key */
64 struct ext4_fsmap gfi_lastfree; /* free ext at end of last bg */
65 struct list_head gfi_meta_list; /* fixed metadata list */
66 bool gfi_last; /* last extent? */
67};
68
69/* Associate a device with a getfsmap handler. */
70struct ext4_getfsmap_dev {
71 int (*gfd_fn)(struct super_block *sb,
72 struct ext4_fsmap *keys,
73 struct ext4_getfsmap_info *info);
74 u32 gfd_dev;
75};
76
77/* Compare two getfsmap device handlers. */
78static int ext4_getfsmap_dev_compare(const void *p1, const void *p2)
79{
80 const struct ext4_getfsmap_dev *d1 = p1;
81 const struct ext4_getfsmap_dev *d2 = p2;
82
83 return d1->gfd_dev - d2->gfd_dev;
84}
85
86/* Compare a record against our starting point */
87static bool ext4_getfsmap_rec_before_low_key(struct ext4_getfsmap_info *info,
88 struct ext4_fsmap *rec)
89{
90 return rec->fmr_physical < info->gfi_low.fmr_physical;
91}
92
93/*
94 * Format a reverse mapping for getfsmap, having translated rm_startblock
95 * into the appropriate daddr units.
96 */
97static int ext4_getfsmap_helper(struct super_block *sb,
98 struct ext4_getfsmap_info *info,
99 struct ext4_fsmap *rec)
100{
101 struct ext4_fsmap fmr;
102 struct ext4_sb_info *sbi = EXT4_SB(sb);
103 ext4_fsblk_t rec_fsblk = rec->fmr_physical;
104 ext4_group_t agno;
105 ext4_grpblk_t cno;
106 int error;
107
108 if (fatal_signal_pending(current))
109 return -EINTR;
110
111 /*
112 * Filter out records that start before our startpoint, if the
113 * caller requested that.
114 */
115 if (ext4_getfsmap_rec_before_low_key(info, rec)) {
116 rec_fsblk += rec->fmr_length;
117 if (info->gfi_next_fsblk < rec_fsblk)
118 info->gfi_next_fsblk = rec_fsblk;
119 return EXT4_QUERY_RANGE_CONTINUE;
120 }
121
122 /* Are we just counting mappings? */
123 if (info->gfi_head->fmh_count == 0) {
124 if (rec_fsblk > info->gfi_next_fsblk)
125 info->gfi_head->fmh_entries++;
126
127 if (info->gfi_last)
128 return EXT4_QUERY_RANGE_CONTINUE;
129
130 info->gfi_head->fmh_entries++;
131
132 rec_fsblk += rec->fmr_length;
133 if (info->gfi_next_fsblk < rec_fsblk)
134 info->gfi_next_fsblk = rec_fsblk;
135 return EXT4_QUERY_RANGE_CONTINUE;
136 }
137
138 /*
139 * If the record starts past the last physical block we saw,
140 * then we've found a gap. Report the gap as being owned by
141 * whatever the caller specified is the missing owner.
142 */
143 if (rec_fsblk > info->gfi_next_fsblk) {
144 if (info->gfi_head->fmh_entries >= info->gfi_head->fmh_count)
145 return EXT4_QUERY_RANGE_ABORT;
146
147 ext4_get_group_no_and_offset(sb, info->gfi_next_fsblk,
148 &agno, &cno);
149 trace_ext4_fsmap_mapping(sb, info->gfi_dev, agno,
150 EXT4_C2B(sbi, cno),
151 rec_fsblk - info->gfi_next_fsblk,
152 EXT4_FMR_OWN_UNKNOWN);
153
154 fmr.fmr_device = info->gfi_dev;
155 fmr.fmr_physical = info->gfi_next_fsblk;
156 fmr.fmr_owner = EXT4_FMR_OWN_UNKNOWN;
157 fmr.fmr_length = rec_fsblk - info->gfi_next_fsblk;
158 fmr.fmr_flags = FMR_OF_SPECIAL_OWNER;
159 error = info->gfi_formatter(&fmr, info->gfi_format_arg);
160 if (error)
161 return error;
162 info->gfi_head->fmh_entries++;
163 }
164
165 if (info->gfi_last)
166 goto out;
167
168 /* Fill out the extent we found */
169 if (info->gfi_head->fmh_entries >= info->gfi_head->fmh_count)
170 return EXT4_QUERY_RANGE_ABORT;
171
172 ext4_get_group_no_and_offset(sb, rec_fsblk, &agno, &cno);
173 trace_ext4_fsmap_mapping(sb, info->gfi_dev, agno, EXT4_C2B(sbi, cno),
174 rec->fmr_length, rec->fmr_owner);
175
176 fmr.fmr_device = info->gfi_dev;
177 fmr.fmr_physical = rec_fsblk;
178 fmr.fmr_owner = rec->fmr_owner;
179 fmr.fmr_flags = FMR_OF_SPECIAL_OWNER;
180 fmr.fmr_length = rec->fmr_length;
181 error = info->gfi_formatter(&fmr, info->gfi_format_arg);
182 if (error)
183 return error;
184 info->gfi_head->fmh_entries++;
185
186out:
187 rec_fsblk += rec->fmr_length;
188 if (info->gfi_next_fsblk < rec_fsblk)
189 info->gfi_next_fsblk = rec_fsblk;
190 return EXT4_QUERY_RANGE_CONTINUE;
191}
192
193static inline ext4_fsblk_t ext4_fsmap_next_pblk(struct ext4_fsmap *fmr)
194{
195 return fmr->fmr_physical + fmr->fmr_length;
196}
197
198/* Transform a blockgroup's free record into a fsmap */
199static int ext4_getfsmap_datadev_helper(struct super_block *sb,
200 ext4_group_t agno, ext4_grpblk_t start,
201 ext4_grpblk_t len, void *priv)
202{
203 struct ext4_fsmap irec;
204 struct ext4_getfsmap_info *info = priv;
205 struct ext4_fsmap *p;
206 struct ext4_fsmap *tmp;
207 struct ext4_sb_info *sbi = EXT4_SB(sb);
208 ext4_fsblk_t fsb;
209 ext4_fsblk_t fslen;
210 int error;
211
212 fsb = (EXT4_C2B(sbi, start) + ext4_group_first_block_no(sb, agno));
213 fslen = EXT4_C2B(sbi, len);
214
215 /* If the retained free extent record is set... */
216 if (info->gfi_lastfree.fmr_owner) {
217 /* ...and abuts this one, lengthen it and return. */
218 if (ext4_fsmap_next_pblk(&info->gfi_lastfree) == fsb) {
219 info->gfi_lastfree.fmr_length += fslen;
220 return 0;
221 }
222
223 /*
224 * There's a gap between the two free extents; emit the
225 * retained extent prior to merging the meta_list.
226 */
227 error = ext4_getfsmap_helper(sb, info, &info->gfi_lastfree);
228 if (error)
229 return error;
230 info->gfi_lastfree.fmr_owner = 0;
231 }
232
233 /* Merge in any relevant extents from the meta_list */
234 list_for_each_entry_safe(p, tmp, &info->gfi_meta_list, fmr_list) {
235 if (p->fmr_physical + p->fmr_length <= info->gfi_next_fsblk) {
236 list_del(&p->fmr_list);
237 kfree(p);
238 } else if (p->fmr_physical < fsb) {
239 error = ext4_getfsmap_helper(sb, info, p);
240 if (error)
241 return error;
242
243 list_del(&p->fmr_list);
244 kfree(p);
245 }
246 }
247
248 irec.fmr_device = 0;
249 irec.fmr_physical = fsb;
250 irec.fmr_length = fslen;
251 irec.fmr_owner = EXT4_FMR_OWN_FREE;
252 irec.fmr_flags = 0;
253
254 /* If this is a free extent at the end of a bg, buffer it. */
255 if (ext4_fsmap_next_pblk(&irec) ==
256 ext4_group_first_block_no(sb, agno + 1)) {
257 info->gfi_lastfree = irec;
258 return 0;
259 }
260
261 /* Otherwise, emit it */
262 return ext4_getfsmap_helper(sb, info, &irec);
263}
264
265/* Execute a getfsmap query against the log device. */
266static int ext4_getfsmap_logdev(struct super_block *sb, struct ext4_fsmap *keys,
267 struct ext4_getfsmap_info *info)
268{
269 journal_t *journal = EXT4_SB(sb)->s_journal;
270 struct ext4_fsmap irec;
271
272 /* Set up search keys */
273 info->gfi_low = keys[0];
274 info->gfi_low.fmr_length = 0;
275
276 memset(&info->gfi_high, 0xFF, sizeof(info->gfi_high));
277
278 trace_ext4_fsmap_low_key(sb, info->gfi_dev, 0,
279 info->gfi_low.fmr_physical,
280 info->gfi_low.fmr_length,
281 info->gfi_low.fmr_owner);
282
283 trace_ext4_fsmap_high_key(sb, info->gfi_dev, 0,
284 info->gfi_high.fmr_physical,
285 info->gfi_high.fmr_length,
286 info->gfi_high.fmr_owner);
287
288 if (keys[0].fmr_physical > 0)
289 return 0;
290
291 /* Fabricate an rmap entry for the external log device. */
292 irec.fmr_physical = journal->j_blk_offset;
293 irec.fmr_length = journal->j_maxlen;
294 irec.fmr_owner = EXT4_FMR_OWN_LOG;
295 irec.fmr_flags = 0;
296
297 return ext4_getfsmap_helper(sb, info, &irec);
298}
299
300/* Helper to fill out an ext4_fsmap. */
301static inline int ext4_getfsmap_fill(struct list_head *meta_list,
302 ext4_fsblk_t fsb, ext4_fsblk_t len,
303 uint64_t owner)
304{
305 struct ext4_fsmap *fsm;
306
307 fsm = kmalloc(sizeof(*fsm), GFP_NOFS);
308 if (!fsm)
309 return -ENOMEM;
310 fsm->fmr_device = 0;
311 fsm->fmr_flags = 0;
312 fsm->fmr_physical = fsb;
313 fsm->fmr_owner = owner;
314 fsm->fmr_length = len;
315 list_add_tail(&fsm->fmr_list, meta_list);
316
317 return 0;
318}
319
320/*
321 * This function returns the number of file system metadata blocks at
322 * the beginning of a block group, including the reserved gdt blocks.
323 */
324static unsigned int ext4_getfsmap_find_sb(struct super_block *sb,
325 ext4_group_t agno,
326 struct list_head *meta_list)
327{
328 struct ext4_sb_info *sbi = EXT4_SB(sb);
329 ext4_fsblk_t fsb = ext4_group_first_block_no(sb, agno);
330 ext4_fsblk_t len;
331 unsigned long first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
332 unsigned long metagroup = agno / EXT4_DESC_PER_BLOCK(sb);
333 int error;
334
335 /* Record the superblock. */
336 if (ext4_bg_has_super(sb, agno)) {
337 error = ext4_getfsmap_fill(meta_list, fsb, 1, EXT4_FMR_OWN_FS);
338 if (error)
339 return error;
340 fsb++;
341 }
342
343 /* Record the group descriptors. */
344 len = ext4_bg_num_gdb(sb, agno);
345 if (!len)
346 return 0;
347 error = ext4_getfsmap_fill(meta_list, fsb, len,
348 EXT4_FMR_OWN_GDT);
349 if (error)
350 return error;
351 fsb += len;
352
353 /* Reserved GDT blocks */
354 if (!ext4_has_feature_meta_bg(sb) || metagroup < first_meta_bg) {
355 len = le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks);
356 error = ext4_getfsmap_fill(meta_list, fsb, len,
357 EXT4_FMR_OWN_RESV_GDT);
358 if (error)
359 return error;
360 }
361
362 return 0;
363}
364
365/* Compare two fsmap items. */
366static int ext4_getfsmap_compare(void *priv,
367 struct list_head *a,
368 struct list_head *b)
369{
370 struct ext4_fsmap *fa;
371 struct ext4_fsmap *fb;
372
373 fa = container_of(a, struct ext4_fsmap, fmr_list);
374 fb = container_of(b, struct ext4_fsmap, fmr_list);
375 if (fa->fmr_physical < fb->fmr_physical)
376 return -1;
377 else if (fa->fmr_physical > fb->fmr_physical)
378 return 1;
379 return 0;
380}
381
382/* Merge adjacent extents of fixed metadata. */
383static void ext4_getfsmap_merge_fixed_metadata(struct list_head *meta_list)
384{
385 struct ext4_fsmap *p;
386 struct ext4_fsmap *prev = NULL;
387 struct ext4_fsmap *tmp;
388
389 list_for_each_entry_safe(p, tmp, meta_list, fmr_list) {
390 if (!prev) {
391 prev = p;
392 continue;
393 }
394
395 if (prev->fmr_owner == p->fmr_owner &&
396 prev->fmr_physical + prev->fmr_length == p->fmr_physical) {
397 prev->fmr_length += p->fmr_length;
398 list_del(&p->fmr_list);
399 kfree(p);
400 } else
401 prev = p;
402 }
403}
404
405/* Free a list of fixed metadata. */
406static void ext4_getfsmap_free_fixed_metadata(struct list_head *meta_list)
407{
408 struct ext4_fsmap *p;
409 struct ext4_fsmap *tmp;
410
411 list_for_each_entry_safe(p, tmp, meta_list, fmr_list) {
412 list_del(&p->fmr_list);
413 kfree(p);
414 }
415}
416
417/* Find all the fixed metadata in the filesystem. */
418int ext4_getfsmap_find_fixed_metadata(struct super_block *sb,
419 struct list_head *meta_list)
420{
421 struct ext4_group_desc *gdp;
422 ext4_group_t agno;
423 int error;
424
425 INIT_LIST_HEAD(meta_list);
426
427 /* Collect everything. */
428 for (agno = 0; agno < EXT4_SB(sb)->s_groups_count; agno++) {
429 gdp = ext4_get_group_desc(sb, agno, NULL);
430 if (!gdp) {
431 error = -EFSCORRUPTED;
432 goto err;
433 }
434
435 /* Superblock & GDT */
436 error = ext4_getfsmap_find_sb(sb, agno, meta_list);
437 if (error)
438 goto err;
439
440 /* Block bitmap */
441 error = ext4_getfsmap_fill(meta_list,
442 ext4_block_bitmap(sb, gdp), 1,
443 EXT4_FMR_OWN_BLKBM);
444 if (error)
445 goto err;
446
447 /* Inode bitmap */
448 error = ext4_getfsmap_fill(meta_list,
449 ext4_inode_bitmap(sb, gdp), 1,
450 EXT4_FMR_OWN_INOBM);
451 if (error)
452 goto err;
453
454 /* Inodes */
455 error = ext4_getfsmap_fill(meta_list,
456 ext4_inode_table(sb, gdp),
457 EXT4_SB(sb)->s_itb_per_group,
458 EXT4_FMR_OWN_INODES);
459 if (error)
460 goto err;
461 }
462
463 /* Sort the list */
464 list_sort(NULL, meta_list, ext4_getfsmap_compare);
465
466 /* Merge adjacent extents */
467 ext4_getfsmap_merge_fixed_metadata(meta_list);
468
469 return 0;
470err:
471 ext4_getfsmap_free_fixed_metadata(meta_list);
472 return error;
473}
474
475/* Execute a getfsmap query against the buddy bitmaps */
476static int ext4_getfsmap_datadev(struct super_block *sb,
477 struct ext4_fsmap *keys,
478 struct ext4_getfsmap_info *info)
479{
480 struct ext4_sb_info *sbi = EXT4_SB(sb);
481 ext4_fsblk_t start_fsb;
482 ext4_fsblk_t end_fsb;
483 ext4_fsblk_t eofs;
484 ext4_group_t start_ag;
485 ext4_group_t end_ag;
486 ext4_grpblk_t first_cluster;
487 ext4_grpblk_t last_cluster;
488 int error = 0;
489
490 eofs = ext4_blocks_count(sbi->s_es);
491 if (keys[0].fmr_physical >= eofs)
492 return 0;
493 if (keys[1].fmr_physical >= eofs)
494 keys[1].fmr_physical = eofs - 1;
495 start_fsb = keys[0].fmr_physical;
496 end_fsb = keys[1].fmr_physical;
497
498 /* Determine first and last group to examine based on start and end */
499 ext4_get_group_no_and_offset(sb, start_fsb, &start_ag, &first_cluster);
500 ext4_get_group_no_and_offset(sb, end_fsb, &end_ag, &last_cluster);
501
502 /*
503 * Convert the fsmap low/high keys to bg based keys. Initialize
504 * low to the fsmap low key and max out the high key to the end
505 * of the bg.
506 */
507 info->gfi_low = keys[0];
508 info->gfi_low.fmr_physical = EXT4_C2B(sbi, first_cluster);
509 info->gfi_low.fmr_length = 0;
510
511 memset(&info->gfi_high, 0xFF, sizeof(info->gfi_high));
512
513 /* Assemble a list of all the fixed-location metadata. */
514 error = ext4_getfsmap_find_fixed_metadata(sb, &info->gfi_meta_list);
515 if (error)
516 goto err;
517
518 /* Query each bg */
519 for (info->gfi_agno = start_ag;
520 info->gfi_agno <= end_ag;
521 info->gfi_agno++) {
522 /*
523 * Set the bg high key from the fsmap high key if this
524 * is the last bg that we're querying.
525 */
526 if (info->gfi_agno == end_ag) {
527 info->gfi_high = keys[1];
528 info->gfi_high.fmr_physical = EXT4_C2B(sbi,
529 last_cluster);
530 info->gfi_high.fmr_length = 0;
531 }
532
533 trace_ext4_fsmap_low_key(sb, info->gfi_dev, info->gfi_agno,
534 info->gfi_low.fmr_physical,
535 info->gfi_low.fmr_length,
536 info->gfi_low.fmr_owner);
537
538 trace_ext4_fsmap_high_key(sb, info->gfi_dev, info->gfi_agno,
539 info->gfi_high.fmr_physical,
540 info->gfi_high.fmr_length,
541 info->gfi_high.fmr_owner);
542
543 error = ext4_mballoc_query_range(sb, info->gfi_agno,
544 EXT4_B2C(sbi, info->gfi_low.fmr_physical),
545 EXT4_B2C(sbi, info->gfi_high.fmr_physical),
546 ext4_getfsmap_datadev_helper, info);
547 if (error)
548 goto err;
549
550 /*
551 * Set the bg low key to the start of the bg prior to
552 * moving on to the next bg.
553 */
554 if (info->gfi_agno == start_ag)
555 memset(&info->gfi_low, 0, sizeof(info->gfi_low));
556 }
557
558 /* Do we have a retained free extent? */
559 if (info->gfi_lastfree.fmr_owner) {
560 error = ext4_getfsmap_helper(sb, info, &info->gfi_lastfree);
561 if (error)
562 goto err;
563 }
564
565 /* Report any gaps at the end of the bg */
566 info->gfi_last = true;
567 error = ext4_getfsmap_datadev_helper(sb, end_ag, last_cluster, 0, info);
568 if (error)
569 goto err;
570
571err:
572 ext4_getfsmap_free_fixed_metadata(&info->gfi_meta_list);
573 return error;
574}
575
576/* Do we recognize the device? */
577static bool ext4_getfsmap_is_valid_device(struct super_block *sb,
578 struct ext4_fsmap *fm)
579{
580 if (fm->fmr_device == 0 || fm->fmr_device == UINT_MAX ||
581 fm->fmr_device == new_encode_dev(sb->s_bdev->bd_dev))
582 return true;
583 if (EXT4_SB(sb)->journal_bdev &&
584 fm->fmr_device == new_encode_dev(EXT4_SB(sb)->journal_bdev->bd_dev))
585 return true;
586 return false;
587}
588
589/* Ensure that the low key is less than the high key. */
590static bool ext4_getfsmap_check_keys(struct ext4_fsmap *low_key,
591 struct ext4_fsmap *high_key)
592{
593 if (low_key->fmr_device > high_key->fmr_device)
594 return false;
595 if (low_key->fmr_device < high_key->fmr_device)
596 return true;
597
598 if (low_key->fmr_physical > high_key->fmr_physical)
599 return false;
600 if (low_key->fmr_physical < high_key->fmr_physical)
601 return true;
602
603 if (low_key->fmr_owner > high_key->fmr_owner)
604 return false;
605 if (low_key->fmr_owner < high_key->fmr_owner)
606 return true;
607
608 return false;
609}
610
611#define EXT4_GETFSMAP_DEVS 2
612/*
613 * Get filesystem's extents as described in head, and format for
614 * output. Calls formatter to fill the user's buffer until all
615 * extents are mapped, until the passed-in head->fmh_count slots have
616 * been filled, or until the formatter short-circuits the loop, if it
617 * is tracking filled-in extents on its own.
618 *
619 * Key to Confusion
620 * ----------------
621 * There are multiple levels of keys and counters at work here:
622 * _fsmap_head.fmh_keys -- low and high fsmap keys passed in;
623 * these reflect fs-wide block addrs.
624 * dkeys -- fmh_keys used to query each device;
625 * these are fmh_keys but w/ the low key
626 * bumped up by fmr_length.
627 * _getfsmap_info.gfi_next_fsblk-- next fs block we expect to see; this
628 * is how we detect gaps in the fsmap
629 * records and report them.
630 * _getfsmap_info.gfi_low/high -- per-bg low/high keys computed from
631 * dkeys; used to query the free space.
632 */
633int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head,
634 ext4_fsmap_format_t formatter, void *arg)
635{
636 struct ext4_fsmap dkeys[2]; /* per-dev keys */
637 struct ext4_getfsmap_dev handlers[EXT4_GETFSMAP_DEVS];
638 struct ext4_getfsmap_info info = {0};
639 int i;
640 int error = 0;
641
642 if (head->fmh_iflags & ~FMH_IF_VALID)
643 return -EINVAL;
644 if (!ext4_getfsmap_is_valid_device(sb, &head->fmh_keys[0]) ||
645 !ext4_getfsmap_is_valid_device(sb, &head->fmh_keys[1]))
646 return -EINVAL;
647
648 head->fmh_entries = 0;
649
650 /* Set up our device handlers. */
651 memset(handlers, 0, sizeof(handlers));
652 handlers[0].gfd_dev = new_encode_dev(sb->s_bdev->bd_dev);
653 handlers[0].gfd_fn = ext4_getfsmap_datadev;
654 if (EXT4_SB(sb)->journal_bdev) {
655 handlers[1].gfd_dev = new_encode_dev(
656 EXT4_SB(sb)->journal_bdev->bd_dev);
657 handlers[1].gfd_fn = ext4_getfsmap_logdev;
658 }
659
660 sort(handlers, EXT4_GETFSMAP_DEVS, sizeof(struct ext4_getfsmap_dev),
661 ext4_getfsmap_dev_compare, NULL);
662
663 /*
664 * To continue where we left off, we allow userspace to use the
665 * last mapping from a previous call as the low key of the next.
666 * This is identified by a non-zero length in the low key. We
667 * have to increment the low key in this scenario to ensure we
668 * don't return the same mapping again, and instead return the
669 * very next mapping.
670 *
671 * Bump the physical offset as there can be no other mapping for
672 * the same physical block range.
673 */
674 dkeys[0] = head->fmh_keys[0];
675 dkeys[0].fmr_physical += dkeys[0].fmr_length;
676 dkeys[0].fmr_owner = 0;
677 dkeys[0].fmr_length = 0;
678 memset(&dkeys[1], 0xFF, sizeof(struct ext4_fsmap));
679
680 if (!ext4_getfsmap_check_keys(dkeys, &head->fmh_keys[1]))
681 return -EINVAL;
682
683 info.gfi_next_fsblk = head->fmh_keys[0].fmr_physical +
684 head->fmh_keys[0].fmr_length;
685 info.gfi_formatter = formatter;
686 info.gfi_format_arg = arg;
687 info.gfi_head = head;
688
689 /* For each device we support... */
690 for (i = 0; i < EXT4_GETFSMAP_DEVS; i++) {
691 /* Is this device within the range the user asked for? */
692 if (!handlers[i].gfd_fn)
693 continue;
694 if (head->fmh_keys[0].fmr_device > handlers[i].gfd_dev)
695 continue;
696 if (head->fmh_keys[1].fmr_device < handlers[i].gfd_dev)
697 break;
698
699 /*
700 * If this device number matches the high key, we have
701 * to pass the high key to the handler to limit the
702 * query results. If the device number exceeds the
703 * low key, zero out the low key so that we get
704 * everything from the beginning.
705 */
706 if (handlers[i].gfd_dev == head->fmh_keys[1].fmr_device)
707 dkeys[1] = head->fmh_keys[1];
708 if (handlers[i].gfd_dev > head->fmh_keys[0].fmr_device)
709 memset(&dkeys[0], 0, sizeof(struct ext4_fsmap));
710
711 info.gfi_dev = handlers[i].gfd_dev;
712 info.gfi_last = false;
713 info.gfi_agno = -1;
714 error = handlers[i].gfd_fn(sb, dkeys, &info);
715 if (error)
716 break;
717 info.gfi_next_fsblk = 0;
718 }
719
720 head->fmh_oflags = FMH_OF_DEV_T;
721 return error;
722}
diff --git a/fs/ext4/fsmap.h b/fs/ext4/fsmap.h
new file mode 100644
index 000000000000..9a2cd367cc66
--- /dev/null
+++ b/fs/ext4/fsmap.h
@@ -0,0 +1,69 @@
1/*
2 * Copyright (C) 2017 Oracle. All Rights Reserved.
3 *
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it would be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20#ifndef __EXT4_FSMAP_H__
21#define __EXT4_FSMAP_H__
22
23struct fsmap;
24
25/* internal fsmap representation */
26struct ext4_fsmap {
27 struct list_head fmr_list;
28 dev_t fmr_device; /* device id */
29 uint32_t fmr_flags; /* mapping flags */
30 uint64_t fmr_physical; /* device offset of segment */
31 uint64_t fmr_owner; /* owner id */
32 uint64_t fmr_length; /* length of segment, blocks */
33};
34
35struct ext4_fsmap_head {
36 uint32_t fmh_iflags; /* control flags */
37 uint32_t fmh_oflags; /* output flags */
38 unsigned int fmh_count; /* # of entries in array incl. input */
39 unsigned int fmh_entries; /* # of entries filled in (output). */
40
41 struct ext4_fsmap fmh_keys[2]; /* low and high keys */
42};
43
44void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest,
45 struct ext4_fsmap *src);
46void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest,
47 struct fsmap *src);
48
49/* fsmap to userspace formatter - copy to user & advance pointer */
50typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *);
51
52int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head,
53 ext4_fsmap_format_t formatter, void *arg);
54
55#define EXT4_QUERY_RANGE_ABORT 1
56#define EXT4_QUERY_RANGE_CONTINUE 0
57
58/* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */
59#define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */
60#define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */
61#define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */
62#define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */
63#define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */
64#define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */
65#define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */
66#define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */
67#define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */
68
69#endif /* __EXT4_FSMAP_H__ */
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a4273ddb9922..dfcb815275f1 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -19,6 +19,9 @@
19#include <linux/delay.h> 19#include <linux/delay.h>
20#include "ext4_jbd2.h" 20#include "ext4_jbd2.h"
21#include "ext4.h" 21#include "ext4.h"
22#include <linux/fsmap.h>
23#include "fsmap.h"
24#include <trace/events/ext4.h>
22 25
23/** 26/**
24 * Swap memory between @a and @b for @len bytes. 27 * Swap memory between @a and @b for @len bytes.
@@ -489,6 +492,90 @@ int ext4_shutdown(struct super_block *sb, unsigned long arg)
489 return 0; 492 return 0;
490} 493}
491 494
495struct getfsmap_info {
496 struct super_block *gi_sb;
497 struct fsmap_head __user *gi_data;
498 unsigned int gi_idx;
499 __u32 gi_last_flags;
500};
501
502static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
503{
504 struct getfsmap_info *info = priv;
505 struct fsmap fm;
506
507 trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
508
509 info->gi_last_flags = xfm->fmr_flags;
510 ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
511 if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
512 sizeof(struct fsmap)))
513 return -EFAULT;
514
515 return 0;
516}
517
518static int ext4_ioc_getfsmap(struct super_block *sb,
519 struct fsmap_head __user *arg)
520{
521 struct getfsmap_info info = {0};
522 struct ext4_fsmap_head xhead = {0};
523 struct fsmap_head head;
524 bool aborted = false;
525 int error;
526
527 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
528 return -EFAULT;
529 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
530 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
531 sizeof(head.fmh_keys[0].fmr_reserved)) ||
532 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
533 sizeof(head.fmh_keys[1].fmr_reserved)))
534 return -EINVAL;
535 /*
536 * ext4 doesn't report file extents at all, so the only valid
537 * file offsets are the magic ones (all zeroes or all ones).
538 */
539 if (head.fmh_keys[0].fmr_offset ||
540 (head.fmh_keys[1].fmr_offset != 0 &&
541 head.fmh_keys[1].fmr_offset != -1ULL))
542 return -EINVAL;
543
544 xhead.fmh_iflags = head.fmh_iflags;
545 xhead.fmh_count = head.fmh_count;
546 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
547 ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
548
549 trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
550 trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
551
552 info.gi_sb = sb;
553 info.gi_data = arg;
554 error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
555 if (error == EXT4_QUERY_RANGE_ABORT) {
556 error = 0;
557 aborted = true;
558 } else if (error)
559 return error;
560
561 /* If we didn't abort, set the "last" flag in the last fmx */
562 if (!aborted && info.gi_idx) {
563 info.gi_last_flags |= FMR_OF_LAST;
564 if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
565 &info.gi_last_flags,
566 sizeof(info.gi_last_flags)))
567 return -EFAULT;
568 }
569
570 /* copy back header */
571 head.fmh_entries = xhead.fmh_entries;
572 head.fmh_oflags = xhead.fmh_oflags;
573 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
574 return -EFAULT;
575
576 return 0;
577}
578
492long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 579long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
493{ 580{
494 struct inode *inode = file_inode(filp); 581 struct inode *inode = file_inode(filp);
@@ -499,6 +586,8 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
499 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 586 ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
500 587
501 switch (cmd) { 588 switch (cmd) {
589 case FS_IOC_GETFSMAP:
590 return ext4_ioc_getfsmap(sb, (void __user *)arg);
502 case EXT4_IOC_GETFLAGS: 591 case EXT4_IOC_GETFLAGS:
503 ext4_get_inode_flags(ei); 592 ext4_get_inode_flags(ei);
504 flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 593 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
@@ -1009,6 +1098,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1009 case EXT4_IOC_GET_ENCRYPTION_PWSALT: 1098 case EXT4_IOC_GET_ENCRYPTION_PWSALT:
1010 case EXT4_IOC_GET_ENCRYPTION_POLICY: 1099 case EXT4_IOC_GET_ENCRYPTION_POLICY:
1011 case EXT4_IOC_SHUTDOWN: 1100 case EXT4_IOC_SHUTDOWN:
1101 case FS_IOC_GETFSMAP:
1012 break; 1102 break;
1013 default: 1103 default:
1014 return -ENOIOCTLCMD; 1104 return -ENOIOCTLCMD;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index dbe51301c2bb..36de58a37653 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -5277,3 +5277,52 @@ out:
5277 range->len = EXT4_C2B(EXT4_SB(sb), trimmed) << sb->s_blocksize_bits; 5277 range->len = EXT4_C2B(EXT4_SB(sb), trimmed) << sb->s_blocksize_bits;
5278 return ret; 5278 return ret;
5279} 5279}
5280
5281/* Iterate all the free extents in the group. */
5282int
5283ext4_mballoc_query_range(
5284 struct super_block *sb,
5285 ext4_group_t group,
5286 ext4_grpblk_t start,
5287 ext4_grpblk_t end,
5288 ext4_mballoc_query_range_fn formatter,
5289 void *priv)
5290{
5291 void *bitmap;
5292 ext4_grpblk_t next;
5293 struct ext4_buddy e4b;
5294 int error;
5295
5296 error = ext4_mb_load_buddy(sb, group, &e4b);
5297 if (error)
5298 return error;
5299 bitmap = e4b.bd_bitmap;
5300
5301 ext4_lock_group(sb, group);
5302
5303 start = (e4b.bd_info->bb_first_free > start) ?
5304 e4b.bd_info->bb_first_free : start;
5305 if (end >= EXT4_CLUSTERS_PER_GROUP(sb))
5306 end = EXT4_CLUSTERS_PER_GROUP(sb) - 1;
5307
5308 while (start <= end) {
5309 start = mb_find_next_zero_bit(bitmap, end + 1, start);
5310 if (start > end)
5311 break;
5312 next = mb_find_next_bit(bitmap, end + 1, start);
5313
5314 ext4_unlock_group(sb, group);
5315 error = formatter(sb, group, start, next - start, priv);
5316 if (error)
5317 goto out_unload;
5318 ext4_lock_group(sb, group);
5319
5320 start = next + 1;
5321 }
5322
5323 ext4_unlock_group(sb, group);
5324out_unload:
5325 ext4_mb_unload_buddy(&e4b);
5326
5327 return error;
5328}
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 1aba469f8220..2bed62084a8c 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -199,4 +199,21 @@ static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
199 return ext4_group_first_block_no(sb, fex->fe_group) + 199 return ext4_group_first_block_no(sb, fex->fe_group) +
200 (fex->fe_start << EXT4_SB(sb)->s_cluster_bits); 200 (fex->fe_start << EXT4_SB(sb)->s_cluster_bits);
201} 201}
202
203typedef int (*ext4_mballoc_query_range_fn)(
204 struct super_block *sb,
205 ext4_group_t agno,
206 ext4_grpblk_t start,
207 ext4_grpblk_t len,
208 void *priv);
209
210int
211ext4_mballoc_query_range(
212 struct super_block *sb,
213 ext4_group_t agno,
214 ext4_grpblk_t start,
215 ext4_grpblk_t end,
216 ext4_mballoc_query_range_fn formatter,
217 void *priv);
218
202#endif 219#endif
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 7b82487401d2..9ec8963ba604 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -49,6 +49,7 @@
49#include "xattr.h" 49#include "xattr.h"
50#include "acl.h" 50#include "acl.h"
51#include "mballoc.h" 51#include "mballoc.h"
52#include "fsmap.h"
52 53
53#define CREATE_TRACE_POINTS 54#define CREATE_TRACE_POINTS
54#include <trace/events/ext4.h> 55#include <trace/events/ext4.h>
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 09c71e9aaebf..dfae175ddebc 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -15,6 +15,7 @@ struct ext4_inode_info;
15struct mpage_da_data; 15struct mpage_da_data;
16struct ext4_map_blocks; 16struct ext4_map_blocks;
17struct extent_status; 17struct extent_status;
18struct ext4_fsmap;
18 19
19#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode)) 20#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
20 21
@@ -2529,6 +2530,79 @@ TRACE_EVENT(ext4_es_shrink,
2529 __entry->scan_time, __entry->nr_skipped, __entry->retried) 2530 __entry->scan_time, __entry->nr_skipped, __entry->retried)
2530); 2531);
2531 2532
2533/* fsmap traces */
2534DECLARE_EVENT_CLASS(ext4_fsmap_class,
2535 TP_PROTO(struct super_block *sb, u32 keydev, u32 agno, u64 bno, u64 len,
2536 u64 owner),
2537 TP_ARGS(sb, keydev, agno, bno, len, owner),
2538 TP_STRUCT__entry(
2539 __field(dev_t, dev)
2540 __field(dev_t, keydev)
2541 __field(u32, agno)
2542 __field(u64, bno)
2543 __field(u64, len)
2544 __field(u64, owner)
2545 ),
2546 TP_fast_assign(
2547 __entry->dev = sb->s_bdev->bd_dev;
2548 __entry->keydev = new_decode_dev(keydev);
2549 __entry->agno = agno;
2550 __entry->bno = bno;
2551 __entry->len = len;
2552 __entry->owner = owner;
2553 ),
2554 TP_printk("dev %d:%d keydev %d:%d agno %u bno %llu len %llu owner %lld\n",
2555 MAJOR(__entry->dev), MINOR(__entry->dev),
2556 MAJOR(__entry->keydev), MINOR(__entry->keydev),
2557 __entry->agno,
2558 __entry->bno,
2559 __entry->len,
2560 __entry->owner)
2561)
2562#define DEFINE_FSMAP_EVENT(name) \
2563DEFINE_EVENT(ext4_fsmap_class, name, \
2564 TP_PROTO(struct super_block *sb, u32 keydev, u32 agno, u64 bno, u64 len, \
2565 u64 owner), \
2566 TP_ARGS(sb, keydev, agno, bno, len, owner))
2567DEFINE_FSMAP_EVENT(ext4_fsmap_low_key);
2568DEFINE_FSMAP_EVENT(ext4_fsmap_high_key);
2569DEFINE_FSMAP_EVENT(ext4_fsmap_mapping);
2570
2571DECLARE_EVENT_CLASS(ext4_getfsmap_class,
2572 TP_PROTO(struct super_block *sb, struct ext4_fsmap *fsmap),
2573 TP_ARGS(sb, fsmap),
2574 TP_STRUCT__entry(
2575 __field(dev_t, dev)
2576 __field(dev_t, keydev)
2577 __field(u64, block)
2578 __field(u64, len)
2579 __field(u64, owner)
2580 __field(u64, flags)
2581 ),
2582 TP_fast_assign(
2583 __entry->dev = sb->s_bdev->bd_dev;
2584 __entry->keydev = new_decode_dev(fsmap->fmr_device);
2585 __entry->block = fsmap->fmr_physical;
2586 __entry->len = fsmap->fmr_length;
2587 __entry->owner = fsmap->fmr_owner;
2588 __entry->flags = fsmap->fmr_flags;
2589 ),
2590 TP_printk("dev %d:%d keydev %d:%d block %llu len %llu owner %lld flags 0x%llx\n",
2591 MAJOR(__entry->dev), MINOR(__entry->dev),
2592 MAJOR(__entry->keydev), MINOR(__entry->keydev),
2593 __entry->block,
2594 __entry->len,
2595 __entry->owner,
2596 __entry->flags)
2597)
2598#define DEFINE_GETFSMAP_EVENT(name) \
2599DEFINE_EVENT(ext4_getfsmap_class, name, \
2600 TP_PROTO(struct super_block *sb, struct ext4_fsmap *fsmap), \
2601 TP_ARGS(sb, fsmap))
2602DEFINE_GETFSMAP_EVENT(ext4_getfsmap_low_key);
2603DEFINE_GETFSMAP_EVENT(ext4_getfsmap_high_key);
2604DEFINE_GETFSMAP_EVENT(ext4_getfsmap_mapping);
2605
2532#endif /* _TRACE_EXT4_H */ 2606#endif /* _TRACE_EXT4_H */
2533 2607
2534/* This part must be outside protection */ 2608/* This part must be outside protection */
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-23 14:02:41 -0400