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Commit | Line | Data |
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0b2681f4 TT |
1 | /* |
2 | * e2freefrag - report filesystem free-space fragmentation | |
3 | * | |
4 | * Copyright (C) 2009 Sun Microsystems, Inc. | |
5 | * | |
6 | * Author: Rupesh Thakare <rupesh@sun.com> | |
7 | * Andreas Dilger <adilger@sun.com> | |
8 | * | |
9 | * %Begin-Header% | |
10 | * This file may be redistributed under the terms of the GNU Public | |
11 | * License version 2. | |
12 | * %End-Header% | |
13 | */ | |
d1154eb4 | 14 | #include "config.h" |
0b2681f4 TT |
15 | #include <stdio.h> |
16 | #ifdef HAVE_UNISTD_H | |
17 | #include <unistd.h> | |
18 | #endif | |
19 | #ifdef HAVE_STDLIB_H | |
20 | #include <stdlib.h> | |
21 | #endif | |
22 | #ifdef HAVE_GETOPT_H | |
23 | #include <getopt.h> | |
24 | #else | |
25 | extern char *optarg; | |
26 | extern int optind; | |
27 | #endif | |
82424fc6 DW |
28 | #if defined(HAVE_EXT2_IOCTLS) && !defined(DEBUGFS) |
29 | # include <sys/ioctl.h> | |
30 | # include <sys/types.h> | |
31 | # include <sys/stat.h> | |
32 | # include <fcntl.h> | |
33 | # include <limits.h> | |
34 | #endif | |
0b2681f4 TT |
35 | |
36 | #include "ext2fs/ext2_fs.h" | |
37 | #include "ext2fs/ext2fs.h" | |
38 | #include "e2freefrag.h" | |
39 | ||
82424fc6 | 40 | #if defined(HAVE_EXT2_IOCTLS) && !defined(DEBUGFS) |
5598a968 | 41 | # if defined(HAVE_LINUX_FSMAP_H) && defined(HAVE_FSMAP_SIZEOF) |
82424fc6 DW |
42 | # include <linux/fsmap.h> |
43 | # endif | |
44 | # include "fsmap.h" | |
45 | #endif | |
46 | ||
97e4f235 TT |
47 | #ifndef PATH_MAX |
48 | #define PATH_MAX 4096 | |
49 | #endif | |
50 | ||
3cebf9c1 | 51 | static void usage(const char *prog) |
0b2681f4 TT |
52 | { |
53 | fprintf(stderr, "usage: %s [-c chunksize in kb] [-h] " | |
54 | "device_name\n", prog); | |
5e96c572 | 55 | #ifndef DEBUGFS |
0b2681f4 | 56 | exit(1); |
5e96c572 | 57 | #endif |
0b2681f4 TT |
58 | } |
59 | ||
60 | static int ul_log2(unsigned long arg) | |
61 | { | |
62 | int l = 0; | |
63 | ||
64 | arg >>= 1; | |
65 | while (arg) { | |
66 | l++; | |
67 | arg >>= 1; | |
68 | } | |
69 | return l; | |
70 | } | |
71 | ||
3cebf9c1 | 72 | static void init_chunk_info(ext2_filsys fs, struct chunk_info *info) |
0b2681f4 TT |
73 | { |
74 | int i; | |
75 | ||
0b2681f4 | 76 | info->blocksize_bits = ul_log2((unsigned long)fs->blocksize); |
cba91c4b TT |
77 | if (info->chunkbytes) { |
78 | info->chunkbits = ul_log2(info->chunkbytes); | |
79 | info->blks_in_chunk = info->chunkbytes >> info->blocksize_bits; | |
80 | } else { | |
81 | info->chunkbits = ul_log2(DEFAULT_CHUNKSIZE); | |
82 | info->blks_in_chunk = DEFAULT_CHUNKSIZE >> info->blocksize_bits; | |
83 | } | |
0b2681f4 TT |
84 | |
85 | info->min = ~0UL; | |
86 | info->max = info->avg = 0; | |
87 | info->real_free_chunks = 0; | |
88 | ||
ad751f11 AD |
89 | for (i = 0; i < MAX_HIST; i++) { |
90 | info->histogram.fc_chunks[i] = 0; | |
91 | info->histogram.fc_blocks[i] = 0; | |
92 | } | |
0b2681f4 TT |
93 | } |
94 | ||
3cebf9c1 TT |
95 | static void update_chunk_stats(struct chunk_info *info, |
96 | unsigned long chunk_size) | |
1e48a456 | 97 | { |
3cebf9c1 | 98 | unsigned long idx; |
1e48a456 | 99 | |
3cebf9c1 TT |
100 | idx = ul_log2(chunk_size) + 1; |
101 | if (idx >= MAX_HIST) | |
102 | idx = MAX_HIST-1; | |
103 | info->histogram.fc_chunks[idx]++; | |
104 | info->histogram.fc_blocks[idx] += chunk_size; | |
1e48a456 TT |
105 | |
106 | if (chunk_size > info->max) | |
107 | info->max = chunk_size; | |
108 | if (chunk_size < info->min) | |
109 | info->min = chunk_size; | |
110 | info->avg += chunk_size; | |
111 | info->real_free_chunks++; | |
112 | } | |
113 | ||
3cebf9c1 | 114 | static void scan_block_bitmap(ext2_filsys fs, struct chunk_info *info) |
0b2681f4 | 115 | { |
4efbac6f | 116 | unsigned long long blocks_count = ext2fs_blocks_count(fs->super); |
0b2681f4 TT |
117 | unsigned long long chunks = (blocks_count + info->blks_in_chunk) >> |
118 | (info->chunkbits - info->blocksize_bits); | |
119 | unsigned long long chunk_num; | |
120 | unsigned long last_chunk_size = 0; | |
121 | unsigned long long chunk_start_blk = 0; | |
3e343b8d | 122 | int used; |
0b2681f4 TT |
123 | |
124 | for (chunk_num = 0; chunk_num < chunks; chunk_num++) { | |
125 | unsigned long long blk, num_blks; | |
126 | int chunk_free; | |
127 | ||
128 | /* Last chunk may be smaller */ | |
129 | if (chunk_start_blk + info->blks_in_chunk > blocks_count) | |
130 | num_blks = blocks_count - chunk_start_blk; | |
131 | else | |
132 | num_blks = info->blks_in_chunk; | |
133 | ||
134 | chunk_free = 0; | |
135 | ||
136 | /* Initialize starting block for first chunk correctly else | |
137 | * there is a segfault when blocksize = 1024 in which case | |
138 | * block_map->start = 1 */ | |
3e343b8d TT |
139 | for (blk = 0; blk < num_blks; blk++, chunk_start_blk++) { |
140 | if (chunk_num == 0 && blk == 0) { | |
141 | blk = fs->super->s_first_data_block; | |
142 | chunk_start_blk = blk; | |
143 | } | |
3c041a51 | 144 | used = ext2fs_fast_test_block_bitmap2(fs->block_map, |
554bc091 | 145 | chunk_start_blk >> fs->cluster_ratio_bits); |
0b2681f4 TT |
146 | if (!used) { |
147 | last_chunk_size++; | |
148 | chunk_free++; | |
149 | } | |
150 | ||
151 | if (used && last_chunk_size != 0) { | |
1e48a456 | 152 | update_chunk_stats(info, last_chunk_size); |
0b2681f4 TT |
153 | last_chunk_size = 0; |
154 | } | |
155 | } | |
156 | ||
157 | if (chunk_free == info->blks_in_chunk) | |
158 | info->free_chunks++; | |
159 | } | |
1e48a456 TT |
160 | if (last_chunk_size != 0) |
161 | update_chunk_stats(info, last_chunk_size); | |
0b2681f4 TT |
162 | } |
163 | ||
82424fc6 DW |
164 | #if defined(HAVE_EXT2_IOCTLS) && !defined(DEBUGFS) |
165 | # define FSMAP_EXTENTS 1024 | |
93accdce DW |
166 | static int scan_online(ext2_filsys fs, struct chunk_info *info, |
167 | blk64_t *free_blks) | |
82424fc6 DW |
168 | { |
169 | struct fsmap_head *fsmap; | |
170 | struct fsmap *extent; | |
171 | struct fsmap *p; | |
172 | char mntpoint[PATH_MAX + 1]; | |
173 | errcode_t retval; | |
174 | int mount_flags; | |
175 | int fd; | |
176 | int ret; | |
ac3256fd | 177 | unsigned int i; |
82424fc6 DW |
178 | |
179 | /* Try to open the mountpoint for a live query. */ | |
180 | retval = ext2fs_check_mount_point(fs->device_name, &mount_flags, | |
181 | mntpoint, PATH_MAX); | |
182 | if (retval) { | |
183 | com_err(fs->device_name, retval, "while checking mount status"); | |
184 | return 0; | |
185 | } | |
ac3256fd | 186 | if (!(mount_flags & EXT2_MF_MOUNTED)) |
82424fc6 DW |
187 | return 0; |
188 | fd = open(mntpoint, O_RDONLY); | |
189 | if (fd < 0) { | |
190 | com_err(mntpoint, errno, "while opening mount point"); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | fsmap = malloc(fsmap_sizeof(FSMAP_EXTENTS)); | |
195 | if (!fsmap) { | |
196 | com_err(fs->device_name, errno, "while allocating memory"); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | memset(fsmap, 0, sizeof(*fsmap)); | |
201 | fsmap->fmh_count = FSMAP_EXTENTS; | |
202 | fsmap->fmh_keys[1].fmr_device = UINT_MAX; | |
203 | fsmap->fmh_keys[1].fmr_physical = ULLONG_MAX; | |
204 | fsmap->fmh_keys[1].fmr_owner = ULLONG_MAX; | |
205 | fsmap->fmh_keys[1].fmr_offset = ULLONG_MAX; | |
206 | fsmap->fmh_keys[1].fmr_flags = UINT_MAX; | |
207 | ||
93accdce | 208 | *free_blks = 0; |
82424fc6 DW |
209 | /* Fill the extent histogram with live data */ |
210 | while (1) { | |
211 | ret = ioctl(fd, FS_IOC_GETFSMAP, fsmap); | |
212 | if (ret < 0) { | |
213 | com_err(fs->device_name, errno, "while calling fsmap"); | |
214 | free(fsmap); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | /* No more extents to map, exit */ | |
219 | if (!fsmap->fmh_entries) | |
220 | break; | |
221 | ||
222 | for (i = 0, extent = fsmap->fmh_recs; | |
223 | i < fsmap->fmh_entries; | |
224 | i++, extent++) { | |
225 | if (!(extent->fmr_flags & FMR_OF_SPECIAL_OWNER) || | |
226 | extent->fmr_owner != FMR_OWN_FREE) | |
227 | continue; | |
228 | update_chunk_stats(info, | |
229 | extent->fmr_length / fs->blocksize); | |
93accdce | 230 | *free_blks += (extent->fmr_length / fs->blocksize); |
82424fc6 DW |
231 | } |
232 | ||
233 | p = &fsmap->fmh_recs[fsmap->fmh_entries - 1]; | |
234 | if (p->fmr_flags & FMR_OF_LAST) | |
235 | break; | |
236 | fsmap_advance(fsmap); | |
237 | } | |
7d671e66 | 238 | free(fsmap); |
82424fc6 DW |
239 | return 1; |
240 | } | |
241 | #else | |
93accdce | 242 | # define scan_online(fs, info, free_blks) (0) |
82424fc6 DW |
243 | #endif /* HAVE_EXT2_IOCTLS */ |
244 | ||
93accdce DW |
245 | static errcode_t scan_offline(ext2_filsys fs, struct chunk_info *info, |
246 | blk64_t *free_blks) | |
82424fc6 DW |
247 | { |
248 | errcode_t retval; | |
249 | ||
93accdce | 250 | *free_blks = ext2fs_free_blocks_count(fs->super); |
82424fc6 DW |
251 | retval = ext2fs_read_block_bitmap(fs); |
252 | if (retval) | |
253 | return retval; | |
254 | scan_block_bitmap(fs, info); | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static errcode_t dump_chunk_info(ext2_filsys fs, struct chunk_info *info, | |
93accdce | 259 | FILE *f, blk64_t free_blks) |
0b2681f4 TT |
260 | { |
261 | unsigned long total_chunks; | |
3cebf9c1 | 262 | const char *unitp = "KMGTPEZY"; |
0b2681f4 | 263 | int units = 10; |
cf5301d7 | 264 | unsigned long start = 0, end; |
0b2681f4 TT |
265 | int i, retval = 0; |
266 | ||
f222de72 | 267 | fprintf(f, "Total blocks: %llu\nFree blocks: %llu (%0.1f%%)\n", |
33b9a60c TT |
268 | (unsigned long long) ext2fs_blocks_count(fs->super), |
269 | (unsigned long long) free_blks, | |
93accdce | 270 | (double)free_blks * 100 / |
5e96c572 | 271 | ext2fs_blocks_count(fs->super)); |
0b2681f4 | 272 | |
cba91c4b | 273 | if (info->chunkbytes) { |
5e96c572 TT |
274 | fprintf(f, "\nChunksize: %lu bytes (%u blocks)\n", |
275 | info->chunkbytes, info->blks_in_chunk); | |
4efbac6f | 276 | total_chunks = (ext2fs_blocks_count(fs->super) + |
cba91c4b TT |
277 | info->blks_in_chunk) >> |
278 | (info->chunkbits - info->blocksize_bits); | |
5e96c572 TT |
279 | fprintf(f, "Total chunks: %lu\nFree chunks: %lu (%0.1f%%)\n", |
280 | total_chunks, info->free_chunks, | |
281 | (double)info->free_chunks * 100 / total_chunks); | |
cba91c4b | 282 | } |
0b2681f4 TT |
283 | |
284 | /* Display chunk information in KB */ | |
285 | if (info->real_free_chunks) { | |
d0550895 TT |
286 | unsigned int scale = fs->blocksize >> 10; |
287 | info->min = info->min * scale; | |
288 | info->max = info->max * scale; | |
289 | info->avg = info->avg / info->real_free_chunks * scale; | |
0b2681f4 TT |
290 | } else { |
291 | info->min = 0; | |
292 | } | |
293 | ||
5e96c572 TT |
294 | fprintf(f, "\nMin. free extent: %lu KB \nMax. free extent: %lu KB\n" |
295 | "Avg. free extent: %lu KB\n", info->min, info->max, info->avg); | |
296 | fprintf(f, "Num. free extent: %lu\n", info->real_free_chunks); | |
0b2681f4 | 297 | |
5e96c572 TT |
298 | fprintf(f, "\nHISTOGRAM OF FREE EXTENT SIZES:\n"); |
299 | fprintf(f, "%s : %12s %12s %7s\n", "Extent Size Range", | |
300 | "Free extents", "Free Blocks", "Percent"); | |
0b2681f4 TT |
301 | for (i = 0; i < MAX_HIST; i++) { |
302 | end = 1 << (i + info->blocksize_bits - units); | |
1e48a456 TT |
303 | if (info->histogram.fc_chunks[i] != 0) { |
304 | char end_str[32]; | |
305 | ||
306 | sprintf(end_str, "%5lu%c-", end, *unitp); | |
307 | if (i == MAX_HIST-1) | |
308 | strcpy(end_str, "max "); | |
5e96c572 TT |
309 | fprintf(f, "%5lu%c...%7s : %12lu %12lu %6.2f%%\n", |
310 | start, *unitp, end_str, | |
311 | info->histogram.fc_chunks[i], | |
312 | info->histogram.fc_blocks[i], | |
313 | (double)info->histogram.fc_blocks[i] * 100 / | |
93accdce | 314 | free_blks); |
1e48a456 | 315 | } |
0b2681f4 TT |
316 | start = end; |
317 | if (start == 1<<10) { | |
318 | start = 1; | |
319 | units += 10; | |
320 | unitp++; | |
321 | } | |
322 | } | |
323 | ||
324 | return retval; | |
325 | } | |
326 | ||
3cebf9c1 | 327 | static void close_device(char *device_name, ext2_filsys fs) |
0b2681f4 | 328 | { |
47fee2ef | 329 | int retval = ext2fs_close_free(&fs); |
0b2681f4 TT |
330 | |
331 | if (retval) | |
332 | com_err(device_name, retval, "while closing the filesystem.\n"); | |
333 | } | |
334 | ||
3cebf9c1 | 335 | static void collect_info(ext2_filsys fs, struct chunk_info *chunk_info, FILE *f) |
0b2681f4 | 336 | { |
cf5301d7 | 337 | unsigned int retval = 0; |
93accdce | 338 | blk64_t free_blks = 0; |
0b2681f4 | 339 | |
5e96c572 TT |
340 | fprintf(f, "Device: %s\n", fs->device_name); |
341 | fprintf(f, "Blocksize: %u bytes\n", fs->blocksize); | |
0b2681f4 | 342 | |
82424fc6 | 343 | init_chunk_info(fs, chunk_info); |
93accdce | 344 | if (!scan_online(fs, chunk_info, &free_blks)) { |
82424fc6 | 345 | init_chunk_info(fs, chunk_info); |
93accdce | 346 | retval = scan_offline(fs, chunk_info, &free_blks); |
82424fc6 | 347 | } |
0b2681f4 TT |
348 | if (retval) { |
349 | com_err(fs->device_name, retval, "while reading block bitmap"); | |
350 | close_device(fs->device_name, fs); | |
351 | exit(1); | |
352 | } | |
353 | ||
93accdce | 354 | retval = dump_chunk_info(fs, chunk_info, f, free_blks); |
0b2681f4 | 355 | if (retval) { |
82424fc6 | 356 | com_err(fs->device_name, retval, "while dumping chunk info"); |
0b2681f4 TT |
357 | close_device(fs->device_name, fs); |
358 | exit(1); | |
359 | } | |
360 | } | |
361 | ||
3cebf9c1 TT |
362 | #ifndef DEBUGFS |
363 | static void open_device(char *device_name, ext2_filsys *fs) | |
0b2681f4 TT |
364 | { |
365 | int retval; | |
37d56864 | 366 | int flag = EXT2_FLAG_FORCE | EXT2_FLAG_64BITS | EXT2_FLAG_THREADS; |
0b2681f4 TT |
367 | |
368 | retval = ext2fs_open(device_name, flag, 0, 0, unix_io_manager, fs); | |
369 | if (retval) { | |
370 | com_err(device_name, retval, "while opening filesystem"); | |
371 | exit(1); | |
372 | } | |
ea2d3788 | 373 | (*fs)->default_bitmap_type = EXT2FS_BMAP64_RBTREE; |
0b2681f4 | 374 | } |
3cebf9c1 | 375 | #endif |
0b2681f4 | 376 | |
5e96c572 | 377 | #ifdef DEBUGFS |
5e96c572 TT |
378 | #include "debugfs.h" |
379 | ||
49125d40 | 380 | void do_freefrag(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)), |
2fcbcb1b | 381 | void *infop EXT2FS_ATTR((unused))) |
5e96c572 | 382 | #else |
0b2681f4 | 383 | int main(int argc, char *argv[]) |
5e96c572 | 384 | #endif |
0b2681f4 | 385 | { |
3cebf9c1 | 386 | struct chunk_info chunk_info; |
0b2681f4 | 387 | ext2_filsys fs = NULL; |
0b2681f4 | 388 | char *progname; |
b887f08f MF |
389 | char *end; |
390 | int c; | |
0b2681f4 | 391 | |
5e96c572 TT |
392 | #ifdef DEBUGFS |
393 | if (check_fs_open(argv[0])) | |
394 | return; | |
bf140bf2 | 395 | reset_getopt(); |
5e96c572 | 396 | #else |
3cebf9c1 TT |
397 | char *device_name; |
398 | ||
137a7dc0 | 399 | add_error_table(&et_ext2_error_table); |
5e96c572 | 400 | #endif |
0b2681f4 | 401 | progname = argv[0]; |
3cebf9c1 | 402 | memset(&chunk_info, 0, sizeof(chunk_info)); |
0b2681f4 TT |
403 | |
404 | while ((c = getopt(argc, argv, "c:h")) != EOF) { | |
405 | switch (c) { | |
406 | case 'c': | |
407 | chunk_info.chunkbytes = strtoull(optarg, &end, 0); | |
408 | if (*end != '\0') { | |
409 | fprintf(stderr, "%s: bad chunk size '%s'\n", | |
410 | progname, optarg); | |
411 | usage(progname); | |
412 | } | |
413 | if (chunk_info.chunkbytes & | |
414 | (chunk_info.chunkbytes - 1)) { | |
415 | fprintf(stderr, "%s: chunk size must be a " | |
aff2cf8e | 416 | "power of 2.\n", argv[0]); |
0b2681f4 TT |
417 | usage(progname); |
418 | } | |
419 | chunk_info.chunkbytes *= 1024; | |
420 | break; | |
0b2681f4 | 421 | case 'h': |
4ebbc0a3 | 422 | default: |
0b2681f4 TT |
423 | usage(progname); |
424 | break; | |
425 | } | |
426 | } | |
427 | ||
5e96c572 | 428 | #ifndef DEBUGFS |
0b2681f4 TT |
429 | if (optind == argc) { |
430 | fprintf(stderr, "%s: missing device name.\n", progname); | |
431 | usage(progname); | |
432 | } | |
433 | ||
434 | device_name = argv[optind]; | |
435 | ||
436 | open_device(device_name, &fs); | |
5e96c572 TT |
437 | #else |
438 | fs = current_fs; | |
439 | #endif | |
0b2681f4 | 440 | |
cba91c4b | 441 | if (chunk_info.chunkbytes && (chunk_info.chunkbytes < fs->blocksize)) { |
0b2681f4 TT |
442 | fprintf(stderr, "%s: chunksize must be greater than or equal " |
443 | "to filesystem blocksize.\n", progname); | |
444 | exit(1); | |
445 | } | |
5e96c572 TT |
446 | collect_info(fs, &chunk_info, stdout); |
447 | #ifndef DEBUGFS | |
0b2681f4 TT |
448 | close_device(device_name, fs); |
449 | ||
3cebf9c1 | 450 | return 0; |
5e96c572 | 451 | #endif |
0b2681f4 | 452 | } |