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Update release notes, etc., for the 1.47.2 release
[e2fsprogs.git] / debugfs / set_fields.c
blobbfe8a139b8294b3f503991c8c7896996425bc990
1 /*
2 * set_fields.c --- set a superblock value
3 *
4 * Copyright (C) 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12 #define _XOPEN_SOURCE 600 /* for inclusion of strptime() and strtoull */
13
14 #ifdef HAVE_STRTOULL
15 #define STRTOULL strtoull
16 #else
17 #define STRTOULL strtoul
18 #endif
19
20 #include "config.h"
21 #include <stdio.h>
22 #include <unistd.h>
23 #include <stdlib.h>
24 #include <ctype.h>
25 #include <string.h>
26 #include <strings.h>
27 #include <time.h>
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #ifdef HAVE_ERRNO_H
31 #include <errno.h>
32 #endif
33 #include <assert.h>
34 #if HAVE_STRINGS_H
35 #include <strings.h>
36 #endif
37 #include <fcntl.h>
38 #include <utime.h>
39
40 #include "debugfs.h"
41 #include "uuid/uuid.h"
42 #include "e2p/e2p.h"
43 #include "support/quotaio.h"
44
45 static struct ext2_super_block set_sb;
46 static struct ext2_inode_large set_inode;
47 static struct ext2_group_desc set_gd;
48 static struct ext4_group_desc set_gd4;
49 static struct mmp_struct set_mmp;
50 static dgrp_t set_bg;
51 static ext2_ino_t set_ino;
52 static int array_idx;
53
54 #define FLAG_ARRAY 0x0001
55 #define FLAG_ALIAS 0x0002 /* Data intersects with other field */
56 #define FLAG_CSUM 0x0004
57
58 struct field_set_info {
59 const char *name;
60 void *ptr;
61 void *ptr2;
62 unsigned int size;
63 errcode_t (*func)(struct field_set_info *info, char *field, char *arg);
64 int flags;
65 int max_idx;
66 };
67
68 static errcode_t parse_uint(struct field_set_info *info, char *field, char *arg);
69 static errcode_t parse_int(struct field_set_info *info, char *field, char *arg);
70 static errcode_t parse_string(struct field_set_info *info, char *field, char *arg);
71 static errcode_t parse_uuid(struct field_set_info *info, char *field, char *arg);
72 static errcode_t parse_hashalg(struct field_set_info *info, char *field, char *arg);
73 static errcode_t parse_encoding(struct field_set_info *info, char *field, char *arg);
74 static errcode_t parse_sb_time(struct field_set_info *info, char *field, char *arg);
75 static errcode_t parse_ino_time(struct field_set_info *info, char *field, char *arg);
76
77 static errcode_t parse_bmap(struct field_set_info *info, char *field, char *arg);
78 static errcode_t parse_gd_csum(struct field_set_info *info, char *field, char *arg);
79 static errcode_t parse_inode_csum(struct field_set_info *info, char *field,
80 char *arg);
81 static errcode_t parse_mmp_clear(struct field_set_info *info, char *field,
82 char *arg);
83
84 #if __GNUC_PREREQ (4, 6) || defined(__clang__)
85 #pragma GCC diagnostic push
86 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
87 #endif
88
89 static struct field_set_info super_fields[] = {
90 { "inodes_count", &set_sb.s_inodes_count, NULL, 4, parse_uint },
91 { "blocks_count", &set_sb.s_blocks_count, &set_sb.s_blocks_count_hi,
92 4, parse_uint },
93 { "r_blocks_count", &set_sb.s_r_blocks_count,
94 &set_sb.s_r_blocks_count_hi, 4, parse_uint },
95 { "free_blocks_count", &set_sb.s_free_blocks_count,
96 &set_sb.s_free_blocks_hi, 4, parse_uint },
97 { "free_inodes_count", &set_sb.s_free_inodes_count, NULL, 4, parse_uint },
98 { "first_data_block", &set_sb.s_first_data_block, NULL, 4, parse_uint },
99 { "log_block_size", &set_sb.s_log_block_size, NULL, 4, parse_uint },
100 { "log_cluster_size", &set_sb.s_log_cluster_size, NULL, 4, parse_int },
101 { "blocks_per_group", &set_sb.s_blocks_per_group, NULL, 4, parse_uint },
102 { "clusters_per_group", &set_sb.s_clusters_per_group, NULL, 4, parse_uint },
103 { "inodes_per_group", &set_sb.s_inodes_per_group, NULL, 4, parse_uint },
104 { "mtime", &set_sb.s_mtime, &set_sb.s_mtime_hi, 5, parse_sb_time },
105 { "wtime", &set_sb.s_wtime, &set_sb.s_wtime_hi, 5, parse_sb_time },
106 { "mnt_count", &set_sb.s_mnt_count, NULL, 2, parse_uint },
107 { "max_mnt_count", &set_sb.s_max_mnt_count, NULL, 2, parse_int },
108 /* s_magic */
109 { "state", &set_sb.s_state, NULL, 2, parse_uint },
110 { "errors", &set_sb.s_errors, NULL, 2, parse_uint },
111 { "minor_rev_level", &set_sb.s_minor_rev_level, NULL, 2, parse_uint },
112 { "lastcheck", &set_sb.s_lastcheck, &set_sb.s_lastcheck_hi, 5,
113 parse_sb_time },
114 { "checkinterval", &set_sb.s_checkinterval, NULL, 4, parse_uint },
115 { "creator_os", &set_sb.s_creator_os, NULL, 4, parse_uint },
116 { "rev_level", &set_sb.s_rev_level, NULL, 4, parse_uint },
117 { "def_resuid", &set_sb.s_def_resuid, NULL, 2, parse_uint },
118 { "def_resgid", &set_sb.s_def_resgid, NULL, 2, parse_uint },
119 { "first_ino", &set_sb.s_first_ino, NULL, 4, parse_uint },
120 { "inode_size", &set_sb.s_inode_size, NULL, 2, parse_uint },
121 { "block_group_nr", &set_sb.s_block_group_nr, NULL, 2, parse_uint },
122 { "feature_compat", &set_sb.s_feature_compat, NULL, 4, parse_uint },
123 { "feature_incompat", &set_sb.s_feature_incompat, NULL, 4, parse_uint },
124 { "feature_ro_compat", &set_sb.s_feature_ro_compat, NULL, 4, parse_uint },
125 { "uuid", &set_sb.s_uuid, NULL, 16, parse_uuid },
126 { "volume_name", &set_sb.s_volume_name, NULL, 16, parse_string },
127 { "last_mounted", &set_sb.s_last_mounted, NULL, 64, parse_string },
128 { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap, NULL,
129 4, parse_uint },
130 { "prealloc_blocks", &set_sb.s_prealloc_blocks, NULL, 1, parse_uint },
131 { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, NULL, 1,
132 parse_uint },
133 { "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, NULL, 2,
134 parse_uint },
135 { "journal_uuid", &set_sb.s_journal_uuid, NULL, 16, parse_uuid },
136 { "journal_inum", &set_sb.s_journal_inum, NULL, 4, parse_uint },
137 { "journal_dev", &set_sb.s_journal_dev, NULL, 4, parse_uint },
138 { "last_orphan", &set_sb.s_last_orphan, NULL, 4, parse_uint },
139 { "hash_seed", &set_sb.s_hash_seed, NULL, 16, parse_uuid },
140 { "def_hash_version", &set_sb.s_def_hash_version, NULL, 1, parse_hashalg },
141 { "jnl_backup_type", &set_sb.s_jnl_backup_type, NULL, 1, parse_uint },
142 { "desc_size", &set_sb.s_desc_size, NULL, 2, parse_uint },
143 { "default_mount_opts", &set_sb.s_default_mount_opts, NULL, 4, parse_uint },
144 { "first_meta_bg", &set_sb.s_first_meta_bg, NULL, 4, parse_uint },
145 { "mkfs_time", &set_sb.s_mkfs_time, &set_sb.s_mkfs_time_hi, 5,
146 parse_sb_time },
147 { "jnl_blocks", &set_sb.s_jnl_blocks[0], NULL, 4, parse_uint, FLAG_ARRAY,
148 17 },
149 { "min_extra_isize", &set_sb.s_min_extra_isize, NULL, 2, parse_uint },
150 { "want_extra_isize", &set_sb.s_want_extra_isize, NULL, 2, parse_uint },
151 { "flags", &set_sb.s_flags, NULL, 4, parse_uint },
152 { "raid_stride", &set_sb.s_raid_stride, NULL, 2, parse_uint },
153 { "mmp_interval", &set_sb.s_mmp_update_interval, NULL, 2, parse_uint },
154 { "mmp_block", &set_sb.s_mmp_block, NULL, 8, parse_uint },
155 { "raid_stripe_width", &set_sb.s_raid_stripe_width, NULL, 4, parse_uint },
156 { "log_groups_per_flex", &set_sb.s_log_groups_per_flex, NULL, 1, parse_uint },
157 { "kbytes_written", &set_sb.s_kbytes_written, NULL, 8, parse_uint },
158 { "snapshot_inum", &set_sb.s_snapshot_inum, NULL, 4, parse_uint },
159 { "snapshot_id", &set_sb.s_snapshot_id, NULL, 4, parse_uint },
160 { "snapshot_r_blocks_count", &set_sb.s_snapshot_r_blocks_count,
161 NULL, 8, parse_uint },
162 { "snapshot_list", &set_sb.s_snapshot_list, NULL, 4, parse_uint },
163 { "mount_opts", &set_sb.s_mount_opts, NULL, 64, parse_string },
164 { "usr_quota_inum", &set_sb.s_usr_quota_inum, NULL, 4, parse_uint },
165 { "grp_quota_inum", &set_sb.s_grp_quota_inum, NULL, 4, parse_uint },
166 { "prj_quota_inum", &set_sb.s_prj_quota_inum, NULL, 4, parse_uint },
167 { "overhead_clusters", &set_sb.s_overhead_clusters, NULL, 4, parse_uint },
168 { "backup_bgs", &set_sb.s_backup_bgs[0], NULL, 4, parse_uint,
169 FLAG_ARRAY, 2 },
170 { "checksum", &set_sb.s_checksum, NULL, 4, parse_uint },
171 { "checksum_type", &set_sb.s_checksum_type, NULL, 1, parse_uint },
172 { "encryption_level", &set_sb.s_encryption_level, NULL, 1, parse_uint },
173 { "error_count", &set_sb.s_error_count, NULL, 4, parse_uint },
174 { "first_error_time", &set_sb.s_first_error_time,
175 &set_sb.s_first_error_time_hi, 5, parse_sb_time },
176 { "first_error_ino", &set_sb.s_first_error_ino, NULL, 4, parse_uint },
177 { "first_error_block", &set_sb.s_first_error_block, NULL, 8, parse_uint },
178 { "first_error_func", &set_sb.s_first_error_func, NULL, 32, parse_string },
179 { "first_error_line", &set_sb.s_first_error_line, NULL, 4, parse_uint },
180 { "last_error_time", &set_sb.s_last_error_time,
181 &set_sb.s_last_error_time_hi, 5, parse_sb_time },
182 { "last_error_ino", &set_sb.s_last_error_ino, NULL, 4, parse_uint },
183 { "last_error_block", &set_sb.s_last_error_block, NULL, 8, parse_uint },
184 { "last_error_func", &set_sb.s_last_error_func, NULL, 32, parse_string },
185 { "last_error_line", &set_sb.s_last_error_line, NULL, 4, parse_uint },
186 { "encrypt_algos", &set_sb.s_encrypt_algos, NULL, 1, parse_uint,
187 FLAG_ARRAY, 4 },
188 { "encrypt_pw_salt", &set_sb.s_encrypt_pw_salt, NULL, 16, parse_uuid },
189 { "lpf_ino", &set_sb.s_lpf_ino, NULL, 4, parse_uint },
190 { "checksum_seed", &set_sb.s_checksum_seed, NULL, 4, parse_uint },
191 { "encoding", &set_sb.s_encoding, NULL, 2, parse_encoding },
192 { "orphan_file_inum", &set_sb.s_orphan_file_inum, NULL, 4, parse_uint },
193 { 0, 0, 0, 0 }
194 };
195
196 static struct field_set_info inode_fields[] = {
197 { "mode", &set_inode.i_mode, NULL, 2, parse_uint },
198 { "uid", &set_inode.i_uid, &set_inode.osd2.linux2.l_i_uid_high,
199 2, parse_uint },
200 { "size", &set_inode.i_size, &set_inode.i_size_high, 4, parse_uint },
201 { "atime", &set_inode.i_atime, &set_inode.i_atime_extra,
202 4, parse_ino_time },
203 { "ctime", &set_inode.i_ctime, &set_inode.i_ctime_extra,
204 4, parse_ino_time },
205 { "mtime", &set_inode.i_mtime, &set_inode.i_mtime_extra,
206 4, parse_ino_time },
207 { "dtime", &set_inode.i_dtime, NULL,
208 4, parse_ino_time },
209 { "gid", &set_inode.i_gid, &set_inode.osd2.linux2.l_i_gid_high,
210 2, parse_uint },
211 { "links_count", &set_inode.i_links_count, NULL, 2, parse_uint },
212 /* Special case: i_blocks is 4 bytes, i_blocks_high is 2 bytes */
213 { "blocks", &set_inode.i_blocks, &set_inode.osd2.linux2.l_i_blocks_hi,
214 6, parse_uint },
215 { "flags", &set_inode.i_flags, NULL, 4, parse_uint },
216 { "version", &set_inode.osd1.linux1.l_i_version,
217 &set_inode.i_version_hi, 4, parse_uint },
218 { "translator", &set_inode.osd1.hurd1.h_i_translator, NULL,
219 4, parse_uint, FLAG_ALIAS },
220 { "block", &set_inode.i_block[0], NULL, 4, parse_uint, FLAG_ARRAY,
221 EXT2_NDIR_BLOCKS },
222 { "block[IND]", &set_inode.i_block[EXT2_IND_BLOCK], NULL, 4, parse_uint },
223 { "block[DIND]", &set_inode.i_block[EXT2_DIND_BLOCK], NULL, 4, parse_uint },
224 { "block[TIND]", &set_inode.i_block[EXT2_TIND_BLOCK], NULL, 4, parse_uint },
225 { "generation", &set_inode.i_generation, NULL, 4, parse_uint },
226 /* Special case: i_file_acl_high is 2 bytes */
227 { "file_acl", &set_inode.i_file_acl,
228 &set_inode.osd2.linux2.l_i_file_acl_high, 6, parse_uint },
229 { "faddr", &set_inode.i_faddr, NULL, 4, parse_uint },
230 { "frag", &set_inode.osd2.hurd2.h_i_frag, NULL, 1, parse_uint, FLAG_ALIAS },
231 { "fsize", &set_inode.osd2.hurd2.h_i_fsize, NULL, 1, parse_uint },
232 { "checksum", &set_inode.osd2.linux2.l_i_checksum_lo,
233 &set_inode.i_checksum_hi, 2, parse_inode_csum, FLAG_CSUM },
234 { "author", &set_inode.osd2.hurd2.h_i_author, NULL,
235 4, parse_uint, FLAG_ALIAS },
236 { "extra_isize", &set_inode.i_extra_isize, NULL,
237 2, parse_uint },
238 { "ctime_extra", &set_inode.i_ctime_extra, NULL,
239 4, parse_uint, FLAG_ALIAS },
240 { "mtime_extra", &set_inode.i_mtime_extra, NULL,
241 4, parse_uint, FLAG_ALIAS },
242 { "atime_extra", &set_inode.i_atime_extra, NULL,
243 4, parse_uint, FLAG_ALIAS },
244 { "crtime", &set_inode.i_crtime, &set_inode.i_crtime_extra,
245 4, parse_ino_time },
246 { "crtime_extra", &set_inode.i_crtime_extra, NULL,
247 4, parse_uint, FLAG_ALIAS },
248 { "projid", &set_inode.i_projid, NULL, 4, parse_uint },
249 { "bmap", NULL, NULL, 4, parse_bmap, FLAG_ARRAY },
250 { 0, 0, 0, 0 }
251 };
252
253 static struct field_set_info ext2_bg_fields[] = {
254 { "block_bitmap", &set_gd.bg_block_bitmap, NULL, 4, parse_uint },
255 { "inode_bitmap", &set_gd.bg_inode_bitmap, NULL, 4, parse_uint },
256 { "inode_table", &set_gd.bg_inode_table, NULL, 4, parse_uint },
257 { "free_blocks_count", &set_gd.bg_free_blocks_count, NULL, 2, parse_uint },
258 { "free_inodes_count", &set_gd.bg_free_inodes_count, NULL, 2, parse_uint },
259 { "used_dirs_count", &set_gd.bg_used_dirs_count, NULL, 2, parse_uint },
260 { "flags", &set_gd.bg_flags, NULL, 2, parse_uint },
261 { "itable_unused", &set_gd.bg_itable_unused, NULL, 2, parse_uint },
262 { "checksum", &set_gd.bg_checksum, NULL, 2, parse_gd_csum },
263 { 0, 0, 0, 0 }
264 };
265
266 static struct field_set_info ext4_bg_fields[] = {
267 { "block_bitmap", &set_gd4.bg_block_bitmap,
268 &set_gd4.bg_block_bitmap_hi, 4, parse_uint },
269 { "inode_bitmap", &set_gd4.bg_inode_bitmap,
270 &set_gd4.bg_inode_bitmap_hi, 4, parse_uint },
271 { "inode_table", &set_gd4.bg_inode_table,
272 &set_gd4.bg_inode_table_hi, 4, parse_uint },
273 { "free_blocks_count", &set_gd4.bg_free_blocks_count,
274 &set_gd4.bg_free_blocks_count_hi, 2, parse_uint },
275 { "free_inodes_count", &set_gd4.bg_free_inodes_count,
276 &set_gd4.bg_free_inodes_count_hi, 2, parse_uint },
277 { "used_dirs_count", &set_gd4.bg_used_dirs_count,
278 &set_gd4.bg_used_dirs_count_hi, 2, parse_uint },
279 { "flags", &set_gd4.bg_flags, NULL, 2, parse_uint },
280 { "exclude_bitmap", &set_gd4.bg_exclude_bitmap_lo,
281 &set_gd4.bg_exclude_bitmap_hi, 4, parse_uint },
282 { "block_bitmap_csum", &set_gd4.bg_block_bitmap_csum_lo,
283 &set_gd4.bg_block_bitmap_csum_hi, 2, parse_uint },
284 { "inode_bitmap_csum", &set_gd4.bg_inode_bitmap_csum_lo,
285 &set_gd4.bg_inode_bitmap_csum_hi, 2, parse_uint },
286 { "itable_unused", &set_gd4.bg_itable_unused,
287 &set_gd4.bg_itable_unused_hi, 2, parse_uint },
288 { "checksum", &set_gd4.bg_checksum, NULL, 2, parse_gd_csum },
289 { 0, 0, 0, 0 }
290 };
291
292 static struct field_set_info mmp_fields[] = {
293 { "clear", &set_mmp.mmp_magic, NULL, sizeof(set_mmp),
294 parse_mmp_clear, FLAG_ALIAS },
295 { "magic", &set_mmp.mmp_magic, NULL, 4, parse_uint },
296 { "seq", &set_mmp.mmp_seq, NULL, 4, parse_uint },
297 { "time", &set_mmp.mmp_time, NULL, 8, parse_uint },
298 { "nodename", &set_mmp.mmp_nodename, NULL, sizeof(set_mmp.mmp_nodename),
299 parse_string },
300 { "bdevname", &set_mmp.mmp_bdevname, NULL, sizeof(set_mmp.mmp_bdevname),
301 parse_string },
302 { "check_interval", &set_mmp.mmp_check_interval, NULL, 2, parse_uint },
303 { "checksum", &set_mmp.mmp_checksum, NULL, 4, parse_uint },
304 { 0, 0, 0, 0 }
305 };
306 #if __GNUC_PREREQ (4, 6)
307 #pragma GCC diagnostic pop
308 #endif
309
310 #ifdef UNITTEST
311
312
313 static void do_verify_field_set_info(struct field_set_info *fields,
314 const void *data, size_t size)
315 {
316 struct field_set_info *ss, *ss2;
317 const char *begin = (char *)data;
318 const char *end = begin + size;
319
320 for (ss = fields ; ss->name ; ss++) {
321 const char *ptr;
322
323 /* Check pointers */
324 ptr = ss->ptr;
325 assert(!ptr || (ptr >= begin && ptr < end));
326 ptr = ss->ptr2;
327 assert(!ptr || (ptr >= begin && ptr < end));
328
329 /* Check function */
330 assert(ss->func);
331
332 for (ss2 = fields ; ss2 != ss ; ss2++) {
333 /* Check duplicate names */
334 assert(strcmp(ss->name, ss2->name));
335
336 if (ss->flags & FLAG_ALIAS || ss2->flags & FLAG_ALIAS)
337 continue;
338 /* Check false aliases, might be copy-n-paste error */
339 assert(!ss->ptr || (ss->ptr != ss2->ptr &&
340 ss->ptr != ss2->ptr2));
341 assert(!ss->ptr2 || (ss->ptr2 != ss2->ptr &&
342 ss->ptr2 != ss2->ptr2));
343 }
344 }
345 }
346
347 int main(int argc, char **argv)
348 {
349 do_verify_field_set_info(super_fields, &set_sb, sizeof(set_sb));
350 do_verify_field_set_info(inode_fields, &set_inode, sizeof(set_inode));
351 do_verify_field_set_info(ext2_bg_fields, &set_gd, sizeof(set_gd));
352 do_verify_field_set_info(ext4_bg_fields, &set_gd4, sizeof(set_gd4));
353 do_verify_field_set_info(mmp_fields, &set_mmp, sizeof(set_mmp));
354 return 0;
355 }
356
357 ext2_filsys current_fs;
358 ext2_ino_t root, cwd;
359
360 #endif /* UNITTEST */
361
362 static int check_suffix(const char *field)
363 {
364 int len = strlen(field);
365
366 if (len <= 3)
367 return 0;
368 field += len-3;
369 if (!strcmp(field, "_lo"))
370 return 1;
371 if (!strcmp(field, "_hi"))
372 return 2;
373 return 0;
374 }
375
376 static struct field_set_info *find_field(struct field_set_info *fields,
377 char *field)
378 {
379 struct field_set_info *ss;
380 const char *prefix;
381 char *arg, *delim, *idx, *tmp;
382 int suffix, prefix_len;
383
384 if (fields == super_fields)
385 prefix = "s_";
386 else if (fields == inode_fields)
387 prefix = "i_";
388 else
389 prefix = "bg_";
390 prefix_len = strlen(prefix);
391 if (strncmp(field, prefix, prefix_len) == 0)
392 field += prefix_len;
393
394 arg = malloc(strlen(field)+1);
395 if (!arg)
396 return NULL;
397 strcpy(arg, field);
398
399 idx = strchr(arg, '[');
400 if (idx) {
401 *idx++ = 0;
402 delim = idx + strlen(idx) - 1;
403 if (!*idx || *delim != ']')
404 idx = 0;
405 else
406 *delim = 0;
407 }
408 /*
409 * Can we parse the number?
410 */
411 if (idx) {
412 array_idx = strtol(idx, &tmp, 0);
413 if (*tmp) {
414 *(--idx) = '[';
415 *delim = ']';
416 idx = 0;
417 }
418 }
419
420 /*
421 * If there is a valid _hi or a _lo suffix, strip it off
422 */
423 suffix = check_suffix(arg);
424 if (suffix > 0)
425 arg[strlen(arg)-3] = 0;
426
427 for (ss = fields ; ss->name ; ss++) {
428 if (suffix && ss->ptr2 == 0)
429 continue;
430 if (ss->flags & FLAG_ARRAY) {
431 if (!idx || (strcmp(ss->name, arg) != 0))
432 continue;
433 if (ss->max_idx > 0 && array_idx >= ss->max_idx)
434 continue;
435 } else {
436 if (strcmp(ss->name, arg) != 0)
437 continue;
438 }
439 free(arg);
440 return ss;
441 }
442 free(arg);
443 return NULL;
444 }
445
446 /*
447 * Note: info->size == 6 is special; this means a base size 4 bytes,
448 * and secondary (high) size of 2 bytes. This is needed for the
449 * special case of i_blocks_high and i_file_acl_high.
450 *
451 * Similarly, info->size == 5 is for superblock timestamps, which have
452 * a 4-byte primary field and a 1-byte _hi field.
453 */
454 static errcode_t parse_uint(struct field_set_info *info, char *field,
455 char *arg)
456 {
457 unsigned long long n, num, mask, limit;
458 int suffix = check_suffix(field);
459 char *tmp;
460 void *field1 = info->ptr, *field2 = info->ptr2;
461 unsigned int size = (info->size == 6 || info->size == 5) ? 4 :
462 info->size;
463 union {
464 __u64 *ptr64;
465 __u32 *ptr32;
466 __u16 *ptr16;
467 __u8 *ptr8;
468 } u;
469
470 if (suffix == 1)
471 field2 = 0;
472 if (suffix == 2) {
473 field1 = field2;
474 field2 = 0;
475 }
476
477 u.ptr8 = (__u8 *) field1;
478 if (info->flags & FLAG_ARRAY)
479 u.ptr8 += array_idx * info->size;
480
481 errno = 0;
482 num = STRTOULL(arg, &tmp, 0);
483 if (*tmp || errno) {
484 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
485 arg, info->name);
486 return EINVAL;
487 }
488 mask = ~0ULL >> ((8 - size) * 8);
489 limit = ~0ULL >> ((8 - info->size) * 8);
490 if (field2 && (info->size != 6 && info->size != 5))
491 limit = ~0ULL >> ((8 - info->size*2) * 8);
492
493 if (num > limit) {
494 fprintf(stderr, "Value '%s' exceeds field %s maximum %llu.\n",
495 arg, info->name, limit);
496 return EINVAL;
497 }
498 n = num & mask;
499 switch (size) {
500 case 8:
501 *u.ptr64 = n;
502 break;
503 case 4:
504 *u.ptr32 = n;
505 break;
506 case 2:
507 *u.ptr16 = n;
508 break;
509 case 1:
510 *u.ptr8 = n;
511 break;
512 }
513 if (!field2)
514 return 0;
515 n = (size == 8) ? 0 : (num >> (size*8));
516 u.ptr8 = (__u8 *) field2;
517 if (info->size > size)
518 size = info->size - size;
519 switch (size) {
520 case 8:
521 /* Should never get here */
522 fprintf(stderr,
523 "64-bit field %s has a second 64-bit field defined; BUG?!?\n",
524 info->name);
525 *u.ptr64 = 0;
526 break;
527 case 4:
528 *u.ptr32 = n;
529 break;
530 case 2:
531 *u.ptr16 = n;
532 break;
533 case 1:
534 *u.ptr8 = n;
535 break;
536 }
537 return 0;
538 }
539
540 static errcode_t parse_int(struct field_set_info *info,
541 char *field EXT2FS_ATTR((unused)), char *arg)
542 {
543 long num;
544 char *tmp;
545 __s32 *ptr32;
546 __s16 *ptr16;
547 __s8 *ptr8;
548
549 num = strtol(arg, &tmp, 0);
550 if (*tmp) {
551 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
552 arg, info->name);
553 return EINVAL;
554 }
555 switch (info->size) {
556 case 4:
557 ptr32 = (__s32 *) info->ptr;
558 *ptr32 = num;
559 break;
560 case 2:
561 ptr16 = (__s16 *) info->ptr;
562 *ptr16 = num;
563 break;
564 case 1:
565 ptr8 = (__s8 *) info->ptr;
566 *ptr8 = num;
567 break;
568 }
569 return 0;
570 }
571
572 static errcode_t parse_string(struct field_set_info *info,
573 char *field EXT2FS_ATTR((unused)), char *arg)
574 {
575 char *cp = (char *) info->ptr;
576
577 if (strlen(arg) >= info->size) {
578 fprintf(stderr, "Error maximum size for %s is %d.\n",
579 info->name, info->size);
580 return EINVAL;
581 }
582 strcpy(cp, arg);
583 return 0;
584 }
585
586 static errcode_t parse_sb_time(struct field_set_info *info,
587 char *field, char *arg)
588 {
589 __s64 t;
590 __u32 t_low, t_high;
591 __u32 *ptr_low;
592 __u8 *ptr_high;
593
594 if (check_suffix(field))
595 return parse_uint(info, field, arg);
596
597 ptr_low = (__u32 *) info->ptr;
598 ptr_high = (__u8 *) info->ptr2;
599
600 t = string_to_time(arg);
601
602 if (t == -1) {
603 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
604 arg, info->name);
605 return EINVAL;
606 }
607 t_low = (__u32) t;
608 t_high = ((t - (__s32)t) >> 32) & EXT4_EPOCH_MASK;
609 *ptr_low = t_low;
610 if (ptr_high)
611 *ptr_high = (*ptr_high & ~EXT4_EPOCH_MASK) | t_high;
612 return 0;
613 }
614
615 static errcode_t parse_ino_time(struct field_set_info *info,
616 char *field, char *arg)
617 {
618 __s64 t;
619 __u32 t_low, t_high;
620 __u32 *ptr_low, *ptr_high;
621
622 if (check_suffix(field))
623 return parse_uint(info, field, arg);
624
625 ptr_low = (__u32 *) info->ptr;
626 ptr_high = (__u32 *) info->ptr2;
627
628 t = string_to_time(arg);
629
630 if (t == -1) {
631 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
632 arg, info->name);
633 return EINVAL;
634 }
635 t_low = (__u32) t;
636 t_high = __encode_extra_time(t, 0);
637 *ptr_low = t_low;
638 if (ptr_high)
639 *ptr_high = t_high;
640 return 0;
641 }
642
643 static errcode_t parse_uuid(struct field_set_info *info,
644 char *field EXT2FS_ATTR((unused)), char *arg)
645 {
646 unsigned char * p = (unsigned char *) info->ptr;
647
648 if ((strcasecmp(arg, "null") == 0) ||
649 (strcasecmp(arg, "clear") == 0)) {
650 uuid_clear(p);
651 } else if (strcasecmp(arg, "time") == 0) {
652 uuid_generate_time(p);
653 } else if (strcasecmp(arg, "random") == 0) {
654 uuid_generate(p);
655 } else if (uuid_parse(arg, p)) {
656 fprintf(stderr, "Invalid UUID format: %s\n", arg);
657 return EINVAL;
658 }
659 return 0;
660 }
661
662 static errcode_t parse_hashalg(struct field_set_info *info,
663 char *field EXT2FS_ATTR((unused)), char *arg)
664 {
665 int hashv;
666 unsigned char *p = (unsigned char *) info->ptr;
667
668 hashv = e2p_string2hash(arg);
669 if (hashv < 0) {
670 fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
671 return EINVAL;
672 }
673 *p = hashv;
674 return 0;
675 }
676
677 static errcode_t parse_encoding(struct field_set_info *info,
678 char *field EXT2FS_ATTR((unused)), char *arg)
679 {
680 int encoding;
681 unsigned char *p = (unsigned char *) info->ptr;
682
683 encoding = e2p_str2encoding(arg);
684 if (encoding < 0)
685 return parse_uint(info, field, arg);
686 *p = encoding;
687 return 0;
688 }
689
690 static errcode_t parse_bmap(struct field_set_info *info,
691 char *field EXT2FS_ATTR((unused)), char *arg)
692 {
693 blk64_t blk;
694 errcode_t retval;
695 char *tmp;
696
697 blk = strtoull(arg, &tmp, 0);
698 if (*tmp) {
699 fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
700 arg, info->name);
701 return EINVAL;
702 }
703
704 retval = ext2fs_bmap2(current_fs, set_ino,
705 (struct ext2_inode *) &set_inode,
706 NULL, BMAP_ALLOC | BMAP_SET, array_idx, NULL,
707 &blk);
708 if (retval) {
709 com_err("set_inode", retval, "while setting block map");
710 }
711 return retval;
712 }
713
714 static errcode_t parse_gd_csum(struct field_set_info *info, char *field,
715 char *arg)
716 {
717 __u16 *checksum = info->ptr;
718
719 if (strcmp(arg, "calc") == 0) {
720 *checksum = ext2fs_group_desc_csum(current_fs, set_bg);
721 printf("Checksum set to 0x%04x\n", *checksum);
722 return 0;
723 }
724 return parse_uint(info, field, arg);
725 }
726
727 static errcode_t parse_inode_csum(struct field_set_info *info, char *field,
728 char *arg)
729 {
730 errcode_t retval = 0;
731 __u32 crc;
732 int is_large_inode = 0;
733
734 if (strcmp(arg, "calc") == 0) {
735 size_t sz = EXT2_INODE_SIZE(current_fs->super);
736 struct ext2_inode_large *tmp_inode = NULL;
737
738 retval = ext2fs_get_mem(sz, &tmp_inode);
739 if (retval)
740 goto out;
741
742 retval = ext2fs_read_inode_full(current_fs, set_ino,
743 (struct ext2_inode *) tmp_inode,
744 sz);
745 if (retval)
746 goto out;
747
748 #ifdef WORDS_BIGENDIAN
749 ext2fs_swap_inode_full(current_fs, tmp_inode,
750 tmp_inode, 1, sz);
751 #endif
752
753 if (sz > EXT2_GOOD_OLD_INODE_SIZE)
754 is_large_inode = 1;
755
756 retval = ext2fs_inode_csum_set(current_fs, set_ino,
757 tmp_inode);
758 if (retval)
759 goto out;
760 #ifdef WORDS_BIGENDIAN
761 crc = set_inode.i_checksum_lo =
762 ext2fs_swab16(tmp_inode->i_checksum_lo);
763
764 #else
765 crc = set_inode.i_checksum_lo = tmp_inode->i_checksum_lo;
766 #endif
767 if (is_large_inode &&
768 set_inode.i_extra_isize >=
769 (offsetof(struct ext2_inode_large,
770 i_checksum_hi) -
771 EXT2_GOOD_OLD_INODE_SIZE)) {
772 #ifdef WORDS_BIGENDIAN
773 set_inode.i_checksum_lo =
774 ext2fs_swab16(tmp_inode->i_checksum_lo);
775 #else
776 set_inode.i_checksum_hi = tmp_inode->i_checksum_hi;
777 #endif
778 crc |= ((__u32)set_inode.i_checksum_hi) << 16;
779 }
780 printf("Checksum set to 0x%08x\n", crc);
781 out:
782 ext2fs_free_mem(&tmp_inode);
783 return retval;
784 }
785 return parse_uint(info, field, arg);
786 }
787
788 static void print_possible_fields(struct field_set_info *fields)
789 {
790 struct field_set_info *ss;
791 const char *type, *cmd;
792 FILE *f;
793 char name[40], idx[40];
794
795 if (fields == super_fields) {
796 type = "Superblock";
797 cmd = "set_super_value";
798 } else if (fields == inode_fields) {
799 type = "Inode";
800 cmd = "set_inode";
801 } else if (fields == mmp_fields) {
802 type = "MMP";
803 cmd = "set_mmp_value";
804 } else {
805 type = "Block group descriptor";
806 cmd = "set_block_group";
807 }
808 f = open_pager();
809
810 fprintf(f, "%s fields supported by the %s command:\n", type, cmd);
811
812 for (ss = fields ; ss->name ; ss++) {
813 type = "unknown";
814 if (ss->func == parse_string)
815 type = "string";
816 else if (ss->func == parse_int)
817 type = "integer";
818 else if (ss->func == parse_uint)
819 type = "unsigned integer";
820 else if (ss->func == parse_uuid)
821 type = "UUID";
822 else if (ss->func == parse_hashalg)
823 type = "hash algorithm";
824 else if ((ss->func == parse_sb_time) ||
825 (ss->func == parse_ino_time))
826 type = "date/time";
827 else if (ss->func == parse_bmap)
828 type = "set physical->logical block map";
829 else if (ss->func == parse_gd_csum)
830 type = "unsigned integer OR \"calc\"";
831 strcpy(name, ss->name);
832 if (ss->flags & FLAG_ARRAY) {
833 if (ss->max_idx > 0)
834 sprintf(idx, "[%d]", ss->max_idx);
835 else
836 strcpy(idx, "[]");
837 strcat(name, idx);
838 }
839 if (ss->ptr2)
840 strcat(name, "[_hi|_lo]");
841 fprintf(f, "\t%-25s\t%s\n", name, type);
842 }
843 close_pager(f);
844 }
845
846
847 void do_set_super(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
848 void *infop EXT2FS_ATTR((unused)))
849 {
850 const char *usage = "<field> <value>\n"
851 "\t\"set_super_value -l\" will list the names of "
852 "superblock fields\n\twhich can be set.";
853 static struct field_set_info *ss;
854
855 if ((argc == 2) && !strcmp(argv[1], "-l")) {
856 print_possible_fields(super_fields);
857 return;
858 }
859
860 if (common_args_process(argc, argv, 3, 3, "set_super_value",
861 usage, CHECK_FS_RW))
862 return;
863
864 if ((ss = find_field(super_fields, argv[1])) == 0) {
865 com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
866 return;
867 }
868 set_sb = *current_fs->super;
869 if (ss->func(ss, argv[1], argv[2]) == 0) {
870 *current_fs->super = set_sb;
871 ext2fs_mark_super_dirty(current_fs);
872 }
873 }
874
875 void do_set_inode(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
876 void *infop EXT2FS_ATTR((unused)))
877 {
878 const char *usage = "<inode> <field> <value>\n"
879 "\t\"set_inode_field -l\" will list the names of "
880 "the fields in an ext2 inode\n\twhich can be set.";
881 static struct field_set_info *ss;
882
883 if ((argc == 2) && !strcmp(argv[1], "-l")) {
884 print_possible_fields(inode_fields);
885 return;
886 }
887
888 if (common_args_process(argc, argv, 4, 4, "set_inode",
889 usage, CHECK_FS_RW))
890 return;
891
892 if ((ss = find_field(inode_fields, argv[2])) == 0) {
893 com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
894 return;
895 }
896
897 set_ino = string_to_inode(argv[1]);
898 if (!set_ino)
899 return;
900
901 if (debugfs_read_inode2(set_ino,
902 (struct ext2_inode *) &set_inode, argv[1],
903 sizeof(set_inode),
904 (ss->flags & FLAG_CSUM) ?
905 READ_INODE_NOCSUM : 0))
906 return;
907
908 if (ss->func(ss, argv[2], argv[3]) == 0) {
909 debugfs_write_inode2(set_ino,
910 (struct ext2_inode *) &set_inode,
911 argv[1], sizeof(set_inode),
912 (ss->flags & FLAG_CSUM) ?
913 WRITE_INODE_NOCSUM : 0);
914 }
915 }
916
917 void do_set_block_group_descriptor(int argc, ss_argv_t argv,
918 int sci_idx EXT2FS_ATTR((unused)),
919 void *infop EXT2FS_ATTR((unused)))
920 {
921 const char *usage = "<bg number> <field> <value>\n"
922 "\t\"set_block_group -l\" will list the names of "
923 "the fields in a block group descriptor\n\twhich can be set.";
924 struct field_set_info *table;
925 struct field_set_info *ss;
926 char *end;
927 void *edit, *target;
928 int size;
929
930 /*
931 * Determine whether we are editing an ext2 or ext4 block group
932 * descriptor. Descriptors larger than ext4_group_desc cannot
933 * have their fields edited yet, because they do not have any
934 * names assigned. When that happens, this function needs to
935 * be updated for the new descriptor struct and fields.
936 */
937 if (current_fs &&
938 EXT2_DESC_SIZE(current_fs->super) >= EXT2_MIN_DESC_SIZE_64BIT) {
939 table = ext4_bg_fields;
940 edit = &set_gd4;
941 size = sizeof(set_gd4);
942 } else {
943 table = ext2_bg_fields;
944 edit = &set_gd;
945 size = sizeof(set_gd);
946 }
947
948 if ((argc == 2) && !strcmp(argv[1], "-l")) {
949 print_possible_fields(table);
950 return;
951 }
952
953 if (common_args_process(argc, argv, 4, 4, "set_block_group",
954 usage, CHECK_FS_RW))
955 return;
956
957 set_bg = strtoul(argv[1], &end, 0);
958 if (*end) {
959 com_err(argv[0], 0, "invalid block group number: %s", argv[1]);
960 return;
961 }
962
963 if (set_bg >= current_fs->group_desc_count) {
964 com_err(argv[0], 0, "block group number too big: %d", set_bg);
965 return;
966 }
967
968 if ((ss = find_field(table, argv[2])) == 0) {
969 com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
970 return;
971 }
972
973 target = ext2fs_group_desc(current_fs, current_fs->group_desc, set_bg);
974 memcpy(edit, target, size);
975 if (ss->func(ss, argv[2], argv[3]) == 0) {
976 memcpy(target, edit, size);
977 ext2fs_mark_super_dirty(current_fs);
978 }
979 }
980
981 static errcode_t parse_mmp_clear(struct field_set_info *info,
982 char *field EXT2FS_ATTR((unused)),
983 char *arg EXT2FS_ATTR((unused)))
984 {
985 errcode_t retval;
986
987 retval = ext2fs_mmp_clear(current_fs);
988 if (retval != 0)
989 com_err("set_mmp_value", retval, "while clearing MMP block\n");
990 else
991 memcpy(info->ptr, current_fs->mmp_buf, info->size);
992
993 return 1; /* we don't need the MMP block written again */
994 }
995
996 #ifdef CONFIG_MMP
997 void do_set_mmp_value(int argc, ss_argv_t argv, int sci_idx EXT2FS_ATTR((unused)),
998 void *infop EXT2FS_ATTR((unused)))
999 {
1000 const char *usage = "<field> <value>\n"
1001 "\t\"set_mmp_value -l\" will list the names of "
1002 "MMP fields\n\twhich can be set.";
1003 static struct field_set_info *smmp;
1004 struct mmp_struct *mmp_s;
1005 errcode_t retval;
1006
1007 if (argc == 2 && strcmp(argv[1], "-l") == 0) {
1008 print_possible_fields(mmp_fields);
1009 return;
1010 }
1011
1012 if (check_fs_open(argv[0]))
1013 return;
1014
1015 if (current_fs->super->s_mmp_block == 0) {
1016 com_err(argv[0], 0, "no MMP block allocated\n");
1017 return;
1018 }
1019
1020 if (common_args_process(argc, argv, 2, 3, "set_mmp_value",
1021 usage, CHECK_FS_RW))
1022 return;
1023
1024 mmp_s = current_fs->mmp_buf;
1025 if (mmp_s == NULL) {
1026 retval = ext2fs_get_mem(current_fs->blocksize, &mmp_s);
1027 if (retval) {
1028 com_err(argv[0], retval, "allocating MMP buffer\n");
1029 return;
1030 }
1031 retval = ext2fs_mmp_read(current_fs,
1032 current_fs->super->s_mmp_block, mmp_s);
1033 if (retval) {
1034 com_err(argv[0], retval, "reading MMP block %llu.\n",
1035 (long long)current_fs->super->s_mmp_block);
1036 ext2fs_free_mem(&mmp_s);
1037 return;
1038 }
1039 current_fs->mmp_buf = mmp_s;
1040 }
1041
1042 smmp = find_field(mmp_fields, argv[1]);
1043 if (smmp == 0) {
1044 com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
1045 return;
1046 }
1047
1048 set_mmp = *mmp_s;
1049 if (smmp->func(smmp, argv[1], argv[2]) == 0) {
1050 ext2fs_mmp_write(current_fs, current_fs->super->s_mmp_block,
1051 &set_mmp);
1052 *mmp_s = set_mmp;
1053 }
1054 }
1055 #else
1056 void do_set_mmp_value(int argc EXT2FS_ATTR((unused)),
1057 ss_argv_t argv EXT2FS_ATTR((unused)),
1058 int sci_idx EXT2FS_ATTR((unused)),
1059 void *infop EXT2FS_ATTR((unused)))
1060 {
1061 fprintf(stdout, "MMP is unsupported, please recompile with "
1062 "--enable-mmp\n");
1063 }
1064 #endif
1065
Ext 2/3/4 filesystem utilities