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Commit | Line | Data |
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17390c04 TT |
1 | /* |
2 | * journal.c --- code for handling the "ext3" journal | |
3b5386dc TT |
3 | * |
4 | * Copyright (C) 2000 Andreas Dilger | |
5 | * Copyright (C) 2000 Theodore Ts'o | |
6 | * | |
7 | * Parts of the code are based on fs/jfs/journal.c by Stephen C. Tweedie | |
8 | * Copyright (C) 1999 Red Hat Software | |
9 | * | |
10 | * This file may be redistributed under the terms of the | |
11 | * GNU General Public License version 2 or at your discretion | |
12 | * any later version. | |
17390c04 TT |
13 | */ |
14 | ||
3b5386dc TT |
15 | #ifdef HAVE_SYS_MOUNT_H |
16 | #include <sys/mount.h> | |
17 | #define MNT_FL (MS_MGC_VAL | MS_RDONLY) | |
18 | #endif | |
19 | #ifdef HAVE_SYS_STAT_H | |
20 | #include <sys/stat.h> | |
21 | #endif | |
17390c04 | 22 | |
53ef44c4 | 23 | #define E2FSCK_INCLUDE_INLINE_FUNCS |
0e8a9560 | 24 | #include "jfs_user.h" |
3b5386dc TT |
25 | #include "problem.h" |
26 | #include "uuid/uuid.h" | |
17390c04 | 27 | |
328a5ce4 | 28 | #ifdef JFS_DEBUG /* Enabled by configure --enable-jfs-debug */ |
3b5386dc | 29 | static int bh_count = 0; |
328a5ce4 | 30 | int journal_enable_debug = 2; |
3b5386dc TT |
31 | #endif |
32 | ||
b2f93192 TT |
33 | /* Kernel compatibility functions for handling the journal. These allow us |
34 | * to use the recovery.c file virtually unchanged from the kernel, so we | |
35 | * don't have to do much to keep kernel and user recovery in sync. | |
36 | */ | |
3b5386dc TT |
37 | int bmap(struct inode *inode, int block) |
38 | { | |
39 | int retval; | |
40 | blk_t phys; | |
41 | ||
42 | retval = ext2fs_bmap(inode->i_ctx->fs, inode->i_ino, &inode->i_ext2, | |
43 | NULL, 0, block, &phys); | |
44 | ||
45 | if (retval) | |
46 | com_err(inode->i_ctx->device_name, retval, | |
47 | _("bmap journal inode %ld, block %d\n"), | |
48 | inode->i_ino, block); | |
49 | ||
50 | return phys; | |
51 | } | |
52 | ||
53 | struct buffer_head *getblk(e2fsck_t ctx, blk_t blocknr, int blocksize) | |
54 | { | |
55 | struct buffer_head *bh; | |
56 | ||
57 | bh = e2fsck_allocate_memory(ctx, sizeof(*bh), "block buffer"); | |
58 | if (!bh) | |
59 | return NULL; | |
60 | ||
61 | jfs_debug(4, "getblk for block %lu (%d bytes)(total %d)\n", | |
53ef44c4 | 62 | (unsigned long) blocknr, blocksize, ++bh_count); |
3b5386dc TT |
63 | |
64 | bh->b_ctx = ctx; | |
65 | bh->b_size = blocksize; | |
66 | bh->b_blocknr = blocknr; | |
67 | ||
68 | return bh; | |
69 | } | |
70 | ||
0e8a9560 | 71 | void ll_rw_block(int rw, int nr, struct buffer_head *bhp[]) |
3b5386dc TT |
72 | { |
73 | int retval; | |
0e8a9560 | 74 | struct buffer_head *bh; |
3b5386dc | 75 | |
0e8a9560 TT |
76 | for (; nr > 0; --nr) { |
77 | bh = *bhp++; | |
78 | if (rw == READ && !bh->b_uptodate) { | |
79 | jfs_debug(3, "reading block %lu/%p\n", | |
53ef44c4 | 80 | (unsigned long) bh->b_blocknr, (void *) bh); |
adee8d75 | 81 | retval = io_channel_read_blk(bh->b_ctx->journal_io, |
0e8a9560 TT |
82 | bh->b_blocknr, |
83 | 1, bh->b_data); | |
84 | if (retval) { | |
85 | com_err(bh->b_ctx->device_name, retval, | |
86 | "while reading block %ld\n", | |
87 | bh->b_blocknr); | |
88 | bh->b_err = retval; | |
89 | continue; | |
90 | } | |
91 | bh->b_uptodate = 1; | |
92 | } else if (rw == WRITE && bh->b_dirty) { | |
93 | jfs_debug(3, "writing block %lu/%p\n", | |
53ef44c4 | 94 | (unsigned long) bh->b_blocknr, (void *) bh); |
adee8d75 | 95 | retval = io_channel_write_blk(bh->b_ctx->journal_io, |
0e8a9560 TT |
96 | bh->b_blocknr, |
97 | 1, bh->b_data); | |
98 | if (retval) { | |
99 | com_err(bh->b_ctx->device_name, retval, | |
100 | "while writing block %ld\n", | |
101 | bh->b_blocknr); | |
102 | bh->b_err = retval; | |
103 | continue; | |
104 | } | |
105 | bh->b_dirty = 0; | |
106 | bh->b_uptodate = 1; | |
107 | } else | |
108 | jfs_debug(3, "no-op %s for block %lu\n", | |
109 | rw == READ ? "read" : "write", | |
53ef44c4 | 110 | (unsigned long) bh->b_blocknr); |
0e8a9560 | 111 | } |
3b5386dc TT |
112 | } |
113 | ||
114 | void mark_buffer_dirty(struct buffer_head *bh, int dummy) | |
115 | { | |
116 | bh->b_dirty = dummy | 1; /* use dummy to avoid unused variable */ | |
117 | } | |
118 | ||
6a6d3d44 TT |
119 | static void mark_buffer_clean(struct buffer_head * bh) |
120 | { | |
121 | bh->b_dirty = 0; | |
122 | } | |
123 | ||
3b5386dc TT |
124 | void brelse(struct buffer_head *bh) |
125 | { | |
126 | if (bh->b_dirty) | |
0e8a9560 | 127 | ll_rw_block(WRITE, 1, &bh); |
3b5386dc | 128 | jfs_debug(3, "freeing block %lu/%p (total %d)\n", |
53ef44c4 | 129 | (unsigned long) bh->b_blocknr, (void *) bh, --bh_count); |
3b5386dc TT |
130 | ext2fs_free_mem((void **) &bh); |
131 | } | |
132 | ||
133 | int buffer_uptodate(struct buffer_head *bh) | |
134 | { | |
135 | return bh->b_uptodate; | |
136 | } | |
137 | ||
15986f79 TT |
138 | void mark_buffer_uptodate(struct buffer_head *bh, int val) |
139 | { | |
140 | bh->b_uptodate = val; | |
141 | } | |
142 | ||
3b5386dc TT |
143 | void wait_on_buffer(struct buffer_head *bh) |
144 | { | |
145 | if (!bh->b_uptodate) | |
0e8a9560 | 146 | ll_rw_block(READ, 1, &bh); |
3b5386dc TT |
147 | } |
148 | ||
80bfaa3e | 149 | |
3b5386dc TT |
150 | static void e2fsck_clear_recover(e2fsck_t ctx, int error) |
151 | { | |
5dd8f963 | 152 | ctx->fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER; |
3b5386dc TT |
153 | |
154 | /* if we had an error doing journal recovery, we need a full fsck */ | |
155 | if (error) | |
5dd8f963 | 156 | ctx->fs->super->s_state &= ~EXT2_VALID_FS; |
3b5386dc TT |
157 | ext2fs_mark_super_dirty(ctx->fs); |
158 | } | |
159 | ||
6a6d3d44 TT |
160 | static errcode_t e2fsck_journal_init_inode(e2fsck_t ctx, |
161 | struct ext2_super_block *s, | |
6a6d3d44 | 162 | journal_t **journal) |
3b5386dc TT |
163 | { |
164 | struct inode *inode; | |
3b5386dc TT |
165 | struct buffer_head *bh; |
166 | blk_t start; | |
167 | int retval; | |
168 | ||
adee8d75 | 169 | jfs_debug(1, "Using journal inode %u\n", s->s_journal_inum); |
3b5386dc TT |
170 | *journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); |
171 | if (!*journal) { | |
172 | return EXT2_ET_NO_MEMORY; | |
173 | } | |
174 | ||
175 | inode = e2fsck_allocate_memory(ctx, sizeof(*inode), "journal inode"); | |
176 | if (!inode) { | |
177 | retval = EXT2_ET_NO_MEMORY; | |
178 | goto exit_journal; | |
179 | } | |
180 | ||
181 | inode->i_ctx = ctx; | |
adee8d75 TT |
182 | inode->i_ino = s->s_journal_inum; |
183 | retval = ext2fs_read_inode(ctx->fs, s->s_journal_inum, &inode->i_ext2); | |
3b5386dc TT |
184 | if (retval) |
185 | goto exit_inode; | |
186 | ||
187 | (*journal)->j_dev = ctx; | |
188 | (*journal)->j_inode = inode; | |
189 | (*journal)->j_blocksize = ctx->fs->blocksize; | |
190 | (*journal)->j_maxlen = inode->i_ext2.i_size / (*journal)->j_blocksize; | |
adee8d75 | 191 | ctx->journal_io = ctx->fs->io; |
3b5386dc TT |
192 | |
193 | if (!inode->i_ext2.i_links_count || | |
194 | !LINUX_S_ISREG(inode->i_ext2.i_mode) || | |
195 | (*journal)->j_maxlen < JFS_MIN_JOURNAL_BLOCKS || | |
196 | (start = bmap(inode, 0)) == 0) { | |
197 | retval = EXT2_ET_BAD_INODE_NUM; | |
198 | goto exit_inode; | |
199 | } | |
200 | ||
201 | bh = getblk(ctx, start, (*journal)->j_blocksize); | |
202 | if (!bh) { | |
203 | retval = EXT2_ET_NO_MEMORY; | |
204 | goto exit_inode; | |
205 | } | |
206 | (*journal)->j_sb_buffer = bh; | |
207 | (*journal)->j_superblock = (journal_superblock_t *)bh->b_data; | |
adee8d75 | 208 | |
3b5386dc TT |
209 | return 0; |
210 | ||
211 | exit_inode: | |
212 | ext2fs_free_mem((void **)&inode); | |
213 | exit_journal: | |
214 | ext2fs_free_mem((void **)journal); | |
215 | ||
216 | return retval; | |
217 | } | |
218 | ||
adee8d75 TT |
219 | static errcode_t e2fsck_journal_init_dev(e2fsck_t ctx, |
220 | struct ext2_super_block *s, | |
221 | journal_t **journal) | |
3b5386dc | 222 | { |
adee8d75 TT |
223 | struct buffer_head *bh; |
224 | io_manager io_ptr; | |
225 | blk_t start; | |
226 | int retval; | |
227 | int blocksize = ctx->fs->blocksize; | |
228 | struct ext2_super_block jsuper; | |
3b5386dc | 229 | struct problem_context pctx; |
6d222f32 | 230 | const char *journal_name; |
3b5386dc TT |
231 | |
232 | clear_problem_context(&pctx); | |
6d222f32 TT |
233 | journal_name = ctx->journal_name; |
234 | if (!journal_name) | |
235 | journal_name = ext2fs_find_block_device(s->s_journal_dev); | |
3b5386dc | 236 | |
6d222f32 | 237 | if (!journal_name) { |
adee8d75 TT |
238 | fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx); |
239 | return EXT2_ET_LOAD_EXT_JOURNAL; | |
3b5386dc TT |
240 | } |
241 | ||
6d222f32 | 242 | jfs_debug(1, "Using journal file %s\n", journal_name); |
adee8d75 TT |
243 | |
244 | #if 1 | |
245 | io_ptr = unix_io_manager; | |
246 | #else | |
247 | io_ptr = test_io_manager; | |
248 | test_io_backing_manager = unix_io_manager; | |
249 | #endif | |
6d222f32 TT |
250 | retval = io_ptr->open(journal_name, IO_FLAG_RW, &ctx->journal_io); |
251 | if (!ctx->journal_name) | |
252 | free((void *) journal_name); | |
253 | if (retval) | |
adee8d75 TT |
254 | return retval; |
255 | ||
256 | io_channel_set_blksize(ctx->journal_io, blocksize); | |
257 | start = (blocksize == 1024) ? 1 : 0; | |
258 | bh = getblk(ctx, start, blocksize); | |
259 | if (!bh) | |
260 | return EXT2_ET_NO_MEMORY; | |
261 | ll_rw_block(READ, 1, &bh); | |
262 | if (bh->b_err) | |
263 | return bh->b_err; | |
264 | memcpy(&jsuper, start ? bh->b_data : bh->b_data + 1024, | |
265 | sizeof(jsuper)); | |
266 | brelse(bh); | |
267 | #ifdef EXT2FS_ENABLE_SWAPFS | |
268 | if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC)) | |
269 | ext2fs_swap_super(&jsuper); | |
270 | #endif | |
271 | if (jsuper.s_magic != EXT2_SUPER_MAGIC || | |
272 | !(jsuper.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
273 | fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx); | |
274 | return EXT2_ET_LOAD_EXT_JOURNAL; | |
3b5386dc | 275 | } |
adee8d75 TT |
276 | /* Make sure the journal UUID is correct */ |
277 | if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid, | |
278 | sizeof(jsuper.s_uuid))) { | |
279 | fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx); | |
280 | return EXT2_ET_LOAD_EXT_JOURNAL; | |
281 | } | |
282 | ||
283 | *journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); | |
284 | if (!*journal) { | |
285 | return EXT2_ET_NO_MEMORY; | |
3b5386dc TT |
286 | } |
287 | ||
adee8d75 TT |
288 | (*journal)->j_dev = ctx; |
289 | (*journal)->j_inode = NULL; | |
290 | (*journal)->j_blocksize = ctx->fs->blocksize; | |
291 | (*journal)->j_maxlen = jsuper.s_blocks_count; | |
292 | ||
293 | bh = getblk(ctx, start+1, (*journal)->j_blocksize); | |
294 | if (!bh) { | |
295 | retval = EXT2_ET_NO_MEMORY; | |
296 | goto errout; | |
297 | } | |
298 | (*journal)->j_sb_buffer = bh; | |
299 | (*journal)->j_superblock = (journal_superblock_t *)bh->b_data; | |
300 | ||
301 | return 0; | |
302 | ||
303 | errout: | |
304 | ext2fs_free_mem((void **)journal); | |
305 | return retval; | |
306 | } | |
307 | ||
308 | static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **journal) | |
309 | { | |
310 | struct ext2_super_block *sb = ctx->fs->super; | |
311 | ||
312 | if (uuid_is_null(sb->s_journal_uuid)) { | |
313 | if (!sb->s_journal_inum) | |
314 | return EXT2_ET_BAD_INODE_NUM; | |
315 | return e2fsck_journal_init_inode(ctx, sb, journal); | |
316 | } else { | |
317 | return e2fsck_journal_init_dev(ctx, sb, journal); | |
318 | } | |
3b5386dc TT |
319 | } |
320 | ||
6a6d3d44 TT |
321 | static errcode_t e2fsck_journal_fix_bad_inode(e2fsck_t ctx, |
322 | struct problem_context *pctx) | |
3b5386dc | 323 | { |
5dd8f963 TT |
324 | struct ext2_super_block *sb = ctx->fs->super; |
325 | int recover = ctx->fs->super->s_feature_incompat & | |
326 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
327 | int has_journal = ctx->fs->super->s_feature_compat & | |
328 | EXT3_FEATURE_COMPAT_HAS_JOURNAL; | |
3b5386dc | 329 | |
5dd8f963 | 330 | if (has_journal || sb->s_journal_inum) { |
3b5386dc | 331 | /* The journal inode is bogus, remove and force full fsck */ |
7e92dfae | 332 | pctx->ino = sb->s_journal_inum; |
3b5386dc | 333 | if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) { |
5dd8f963 | 334 | if (has_journal && sb->s_journal_inum) |
3b5386dc TT |
335 | printf("*** ext3 journal has been deleted - " |
336 | "filesystem is now ext2 only ***\n\n"); | |
5dd8f963 TT |
337 | sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
338 | sb->s_journal_inum = 0; | |
424cd2be | 339 | ctx->flags |= E2F_FLAG_JOURNAL_INODE; /* FIXME: todo */ |
3b5386dc TT |
340 | e2fsck_clear_recover(ctx, 1); |
341 | return 0; | |
342 | } | |
343 | return EXT2_ET_BAD_INODE_NUM; | |
344 | } else if (recover) { | |
345 | if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) { | |
346 | e2fsck_clear_recover(ctx, 1); | |
347 | return 0; | |
348 | } | |
349 | return EXT2_ET_UNSUPP_FEATURE; | |
350 | } | |
351 | return 0; | |
352 | } | |
353 | ||
6a6d3d44 | 354 | static errcode_t e2fsck_journal_load(journal_t *journal) |
3b5386dc TT |
355 | { |
356 | e2fsck_t ctx = journal->j_dev; | |
357 | journal_superblock_t *jsb; | |
358 | struct buffer_head *jbh = journal->j_sb_buffer; | |
359 | struct problem_context pctx; | |
360 | ||
361 | clear_problem_context(&pctx); | |
362 | ||
0e8a9560 | 363 | ll_rw_block(READ, 1, &jbh); |
3b5386dc TT |
364 | if (jbh->b_err) { |
365 | com_err(ctx->device_name, jbh->b_err, | |
366 | _("reading journal superblock\n")); | |
367 | return jbh->b_err; | |
368 | } | |
369 | ||
370 | jsb = journal->j_superblock; | |
371 | /* If we don't even have JFS_MAGIC, we probably have a wrong inode */ | |
372 | if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER)) | |
373 | return e2fsck_journal_fix_bad_inode(ctx, &pctx); | |
374 | ||
0e8a9560 TT |
375 | switch (ntohl(jsb->s_header.h_blocktype)) { |
376 | case JFS_SUPERBLOCK_V1: | |
377 | journal->j_format_version = 1; | |
378 | break; | |
379 | ||
380 | case JFS_SUPERBLOCK_V2: | |
381 | journal->j_format_version = 2; | |
adee8d75 TT |
382 | if (ntohl(jsb->s_nr_users) > 1) { |
383 | fix_problem(ctx, PR_0_JOURNAL_UNSUPP_MULTIFS, &pctx); | |
384 | return EXT2_ET_JOURNAL_UNSUPP_VERSION; | |
385 | } | |
0e8a9560 | 386 | break; |
c7f23364 TT |
387 | |
388 | /* | |
389 | * These should never appear in a journal super block, so if | |
390 | * they do, the journal is badly corrupted. | |
391 | */ | |
392 | case JFS_DESCRIPTOR_BLOCK: | |
393 | case JFS_COMMIT_BLOCK: | |
394 | case JFS_REVOKE_BLOCK: | |
395 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
0e8a9560 TT |
396 | |
397 | /* If we don't understand the superblock major type, but there | |
398 | * is a magic number, then it is likely to be a new format we | |
399 | * just don't understand, so leave it alone. */ | |
400 | default: | |
c7f23364 | 401 | return EXT2_ET_JOURNAL_UNSUPP_VERSION; |
0e8a9560 TT |
402 | } |
403 | ||
2f686ace TT |
404 | if (JFS_HAS_INCOMPAT_FEATURE(journal, ~JFS_KNOWN_INCOMPAT_FEATURES)) |
405 | return EXT2_ET_UNSUPP_FEATURE; | |
424cd2be | 406 | |
2f686ace TT |
407 | if (JFS_HAS_RO_COMPAT_FEATURE(journal, ~JFS_KNOWN_ROCOMPAT_FEATURES)) |
408 | return EXT2_ET_RO_UNSUPP_FEATURE; | |
3b5386dc | 409 | |
0e8a9560 TT |
410 | /* We have now checked whether we know enough about the journal |
411 | * format to be able to proceed safely, so any other checks that | |
412 | * fail we should attempt to recover from. */ | |
413 | if (jsb->s_blocksize != htonl(journal->j_blocksize)) { | |
414 | com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, | |
415 | _("%s: no valid journal superblock found\n"), | |
416 | ctx->device_name); | |
417 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
3b5386dc TT |
418 | } |
419 | ||
420 | if (ntohl(jsb->s_maxlen) < journal->j_maxlen) | |
421 | journal->j_maxlen = ntohl(jsb->s_maxlen); | |
422 | else if (ntohl(jsb->s_maxlen) > journal->j_maxlen) { | |
0e8a9560 TT |
423 | com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, |
424 | _("%s: journal too short\n"), | |
425 | ctx->device_name); | |
3b5386dc TT |
426 | return EXT2_ET_CORRUPT_SUPERBLOCK; |
427 | } | |
428 | ||
429 | journal->j_tail_sequence = ntohl(jsb->s_sequence); | |
ecf1b776 | 430 | journal->j_transaction_sequence = journal->j_tail_sequence; |
3b5386dc TT |
431 | journal->j_tail = ntohl(jsb->s_start); |
432 | journal->j_first = ntohl(jsb->s_first); | |
433 | journal->j_last = ntohl(jsb->s_maxlen); | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
53ef44c4 | 438 | static void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb, |
6a6d3d44 | 439 | journal_t *journal) |
3b5386dc | 440 | { |
0e8a9560 | 441 | char *p; |
424cd2be TT |
442 | union { |
443 | uuid_t uuid; | |
444 | __u32 val[4]; | |
445 | } u; | |
446 | __u32 new_seq = 0; | |
447 | int i; | |
448 | ||
0e8a9560 TT |
449 | /* Leave a valid existing V1 superblock signature alone. |
450 | * Anything unrecognisable we overwrite with a new V2 | |
451 | * signature. */ | |
452 | ||
453 | if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER) || | |
454 | jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1)) { | |
455 | jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); | |
456 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); | |
457 | } | |
458 | ||
459 | /* Zero out everything else beyond the superblock header */ | |
460 | ||
461 | p = ((char *) jsb) + sizeof(journal_header_t); | |
462 | memset (p, 0, ctx->fs->blocksize-sizeof(journal_header_t)); | |
463 | ||
3b5386dc | 464 | jsb->s_blocksize = htonl(ctx->fs->blocksize); |
0e8a9560 TT |
465 | jsb->s_maxlen = htonl(journal->j_maxlen); |
466 | jsb->s_first = htonl(1); | |
0e8a9560 | 467 | |
424cd2be TT |
468 | /* Initialize the journal sequence number so that there is "no" |
469 | * chance we will find old "valid" transactions in the journal. | |
470 | * This avoids the need to zero the whole journal (slow to do, | |
471 | * and risky when we are just recovering the filesystem). | |
472 | */ | |
473 | uuid_generate(u.uuid); | |
474 | for (i = 0; i < 4; i ++) | |
475 | new_seq ^= u.val[i]; | |
476 | jsb->s_sequence = htonl(new_seq); | |
0e8a9560 | 477 | |
c7f23364 | 478 | mark_buffer_dirty(journal->j_sb_buffer, 1); |
0e8a9560 | 479 | ll_rw_block(WRITE, 1, &journal->j_sb_buffer); |
3b5386dc TT |
480 | } |
481 | ||
6a6d3d44 TT |
482 | static errcode_t e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, |
483 | journal_t *journal, | |
484 | struct problem_context *pctx) | |
3b5386dc | 485 | { |
5dd8f963 TT |
486 | struct ext2_super_block *sb = ctx->fs->super; |
487 | int recover = ctx->fs->super->s_feature_incompat & | |
488 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc TT |
489 | |
490 | pctx->num = journal->j_inode->i_ino; | |
491 | ||
5dd8f963 | 492 | if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) { |
3b5386dc | 493 | if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) { |
b2f93192 TT |
494 | e2fsck_journal_reset_super(ctx, journal->j_superblock, |
495 | journal); | |
3b5386dc TT |
496 | journal->j_transaction_sequence = 1; |
497 | e2fsck_clear_recover(ctx, recover); | |
498 | return 0; | |
499 | } | |
500 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
501 | } else if (e2fsck_journal_fix_bad_inode(ctx, pctx)) | |
502 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
6a6d3d44 TT |
507 | static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, |
508 | int reset, int drop) | |
3b5386dc TT |
509 | { |
510 | journal_superblock_t *jsb; | |
511 | ||
6a6d3d44 TT |
512 | if (drop) |
513 | mark_buffer_clean(journal->j_sb_buffer); | |
514 | else if (!(ctx->options & E2F_OPT_READONLY)) { | |
3b5386dc TT |
515 | jsb = journal->j_superblock; |
516 | jsb->s_sequence = htonl(journal->j_transaction_sequence); | |
517 | if (reset) | |
518 | jsb->s_start = 0; /* this marks the journal as empty */ | |
519 | mark_buffer_dirty(journal->j_sb_buffer, 1); | |
520 | } | |
521 | brelse(journal->j_sb_buffer); | |
522 | ||
6d222f32 TT |
523 | if (ctx->journal_io) { |
524 | if (ctx->fs && ctx->fs->io != ctx->journal_io) | |
525 | io_channel_close(ctx->journal_io); | |
526 | ctx->journal_io = 0; | |
527 | } | |
528 | ||
3b5386dc | 529 | if (journal->j_inode) |
6a6d3d44 | 530 | ext2fs_free_mem((void **)&journal->j_inode); |
3b5386dc TT |
531 | ext2fs_free_mem((void **)&journal); |
532 | } | |
533 | ||
9b565759 TT |
534 | /* |
535 | * This function makes sure that the superblock fields regarding the | |
536 | * journal are consistent. | |
537 | */ | |
3b5386dc TT |
538 | int e2fsck_check_ext3_journal(e2fsck_t ctx) |
539 | { | |
5dd8f963 | 540 | struct ext2_super_block *sb = ctx->fs->super; |
3b5386dc | 541 | journal_t *journal; |
5dd8f963 TT |
542 | int recover = ctx->fs->super->s_feature_incompat & |
543 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc | 544 | struct problem_context pctx; |
d3f35b64 | 545 | int reset = 0, force_fsck = 0; |
3b5386dc TT |
546 | int retval; |
547 | ||
548 | /* If we don't have any journal features, don't do anything more */ | |
5dd8f963 TT |
549 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && |
550 | !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 && | |
551 | uuid_is_null(sb->s_journal_uuid)) | |
9b565759 | 552 | return 0; |
3b5386dc TT |
553 | |
554 | clear_problem_context(&pctx); | |
5dd8f963 | 555 | pctx.num = sb->s_journal_inum; |
3b5386dc TT |
556 | |
557 | retval = e2fsck_get_journal(ctx, &journal); | |
558 | if (retval) { | |
559 | if (retval == EXT2_ET_BAD_INODE_NUM) | |
560 | return e2fsck_journal_fix_bad_inode(ctx, &pctx); | |
561 | return retval; | |
562 | } | |
563 | ||
564 | retval = e2fsck_journal_load(journal); | |
565 | if (retval) { | |
c7f23364 | 566 | if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) || |
2f686ace TT |
567 | ((retval == EXT2_ET_UNSUPP_FEATURE) && |
568 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT, | |
569 | &pctx))) || | |
570 | ((retval == EXT2_ET_RO_UNSUPP_FEATURE) && | |
571 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT, | |
572 | &pctx))) || | |
c7f23364 TT |
573 | ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) && |
574 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx)))) | |
6a6d3d44 TT |
575 | retval = e2fsck_journal_fix_corrupt_super(ctx, journal, |
576 | &pctx); | |
577 | e2fsck_journal_release(ctx, journal, 0, 1); | |
3b5386dc TT |
578 | return retval; |
579 | } | |
580 | ||
581 | /* | |
582 | * We want to make the flags consistent here. We will not leave with | |
583 | * needs_recovery set but has_journal clear. We can't get in a loop | |
584 | * with -y, -n, or -p, only if a user isn't making up their mind. | |
585 | */ | |
586 | no_has_journal: | |
5dd8f963 TT |
587 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { |
588 | recover = sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc TT |
589 | pctx.str = "inode"; |
590 | if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) { | |
591 | if (recover && | |
592 | !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx)) | |
593 | goto no_has_journal; | |
d3f35b64 TT |
594 | /* |
595 | * Need a full fsck if we are releasing a | |
8c2dc521 | 596 | * journal stored on a reserved inode. |
d3f35b64 TT |
597 | */ |
598 | force_fsck = recover || | |
599 | (sb->s_journal_inum < EXT2_FIRST_INODE(sb)); | |
600 | /* Clear all of the journal fields */ | |
5dd8f963 | 601 | sb->s_journal_inum = 0; |
d3f35b64 TT |
602 | sb->s_journal_dev = 0; |
603 | memset(sb->s_journal_uuid, 0, | |
604 | sizeof(sb->s_journal_uuid)); | |
605 | e2fsck_clear_recover(ctx, force_fsck); | |
3b5386dc | 606 | } else if (!(ctx->options & E2F_OPT_READONLY)) { |
5dd8f963 | 607 | sb->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
3b5386dc TT |
608 | ext2fs_mark_super_dirty(ctx->fs); |
609 | } | |
610 | } | |
611 | ||
5dd8f963 TT |
612 | if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL && |
613 | !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) && | |
3b5386dc | 614 | journal->j_superblock->s_start != 0) { |
d3f35b64 | 615 | if (fix_problem(ctx, PR_0_JOURNAL_RESET_JOURNAL, &pctx)) { |
3b5386dc | 616 | reset = 1; |
d3f35b64 TT |
617 | sb->s_state &= ~EXT2_VALID_FS; |
618 | ext2fs_mark_super_dirty(ctx->fs); | |
619 | } | |
620 | /* | |
621 | * If the user answers no to the above question, we | |
622 | * ignore the fact that journal apparently has data; | |
623 | * accidentally replaying over valid data would be far | |
624 | * worse than skipping a questionable recovery. | |
625 | * | |
626 | * XXX should we abort with a fatal error here? What | |
627 | * will the ext3 kernel code do if a filesystem with | |
628 | * !NEEDS_RECOVERY but with a non-zero | |
629 | * journal->j_superblock->s_start is mounted? | |
630 | */ | |
3b5386dc TT |
631 | } |
632 | ||
6a6d3d44 | 633 | e2fsck_journal_release(ctx, journal, reset, 0); |
3b5386dc TT |
634 | return retval; |
635 | } | |
636 | ||
6a6d3d44 | 637 | static errcode_t recover_ext3_journal(e2fsck_t ctx) |
3b5386dc | 638 | { |
3b5386dc TT |
639 | journal_t *journal; |
640 | int retval; | |
641 | ||
642 | retval = e2fsck_get_journal(ctx, &journal); | |
643 | if (retval) | |
ecf1b776 TT |
644 | return retval; |
645 | ||
3b5386dc TT |
646 | retval = e2fsck_journal_load(journal); |
647 | if (retval) | |
6a6d3d44 | 648 | goto errout; |
3b5386dc | 649 | |
0e8a9560 TT |
650 | retval = journal_init_revoke(journal, 1024); |
651 | if (retval) | |
6a6d3d44 | 652 | goto errout; |
0e8a9560 | 653 | |
3b5386dc | 654 | retval = -journal_recover(journal); |
c0a083fa TT |
655 | if (retval) |
656 | goto errout; | |
657 | ||
658 | if (journal->j_superblock->s_errno) { | |
659 | ctx->fs->super->s_state |= EXT2_ERROR_FS; | |
660 | ext2fs_mark_super_dirty(ctx->fs); | |
661 | journal->j_superblock->s_errno = 0; | |
662 | mark_buffer_dirty(journal->j_sb_buffer, 1); | |
663 | } | |
664 | ||
6a6d3d44 TT |
665 | errout: |
666 | e2fsck_journal_release(ctx, journal, 1, 0); | |
3b5386dc TT |
667 | return retval; |
668 | } | |
669 | ||
80bfaa3e TT |
670 | int e2fsck_run_ext3_journal(e2fsck_t ctx) |
671 | { | |
672 | io_manager io_ptr = ctx->fs->io->manager; | |
673 | int blocksize = ctx->fs->blocksize; | |
ecf1b776 | 674 | errcode_t retval, recover_retval; |
8394902e TT |
675 | |
676 | printf(_("%s: recovering journal\n"), ctx->device_name); | |
ecf1b776 | 677 | if (ctx->options & E2F_OPT_READONLY) { |
8394902e | 678 | printf(_("%s: won't do journal recovery while read-only\n"), |
ecf1b776 TT |
679 | ctx->device_name); |
680 | return EXT2_ET_FILE_RO; | |
681 | } | |
682 | ||
0f2cfe25 | 683 | if (ctx->fs->flags & EXT2_FLAG_DIRTY) |
3c6b8977 | 684 | ext2fs_flush(ctx->fs); /* Force out any modifications */ |
d0515212 | 685 | |
ecf1b776 | 686 | recover_retval = recover_ext3_journal(ctx); |
80bfaa3e TT |
687 | |
688 | /* | |
689 | * Reload the filesystem context to get up-to-date data from disk | |
690 | * because journal recovery will change the filesystem under us. | |
691 | */ | |
692 | ext2fs_close(ctx->fs); | |
ecf1b776 | 693 | retval = ext2fs_open(ctx->filesystem_name, EXT2_FLAG_RW, |
80bfaa3e TT |
694 | ctx->superblock, blocksize, io_ptr, |
695 | &ctx->fs); | |
696 | ||
697 | if (retval) { | |
698 | com_err(ctx->program_name, retval, | |
699 | _("while trying to re-open %s"), | |
700 | ctx->device_name); | |
99a2cc96 | 701 | fatal_error(ctx, 0); |
80bfaa3e TT |
702 | } |
703 | ctx->fs->priv_data = ctx; | |
17390c04 | 704 | |
ecf1b776 TT |
705 | /* Set the superblock flags */ |
706 | e2fsck_clear_recover(ctx, recover_retval); | |
707 | return recover_retval; | |
17390c04 | 708 | } |
773fd8a1 TT |
709 | |
710 | /* | |
711 | * This function will move the journal inode from a visible file in | |
712 | * the filesystem directory hierarchy to the reserved inode if necessary. | |
713 | */ | |
714 | const static char * const journal_names[] = { | |
715 | ".journal", "journal", ".journal.dat", "journal.dat", 0 }; | |
716 | ||
717 | void e2fsck_move_ext3_journal(e2fsck_t ctx) | |
718 | { | |
719 | struct ext2_super_block *sb = ctx->fs->super; | |
720 | struct problem_context pctx; | |
721 | struct ext2_inode inode; | |
722 | ext2_filsys fs = ctx->fs; | |
723 | ext2_ino_t ino; | |
724 | errcode_t retval; | |
725 | const char * const * cpp; | |
726 | int group, mount_flags; | |
727 | ||
728 | /* | |
729 | * If the filesystem is opened read-only, or there is no | |
730 | * journal, or the journal is already in the hidden inode, | |
731 | * then do nothing. | |
732 | */ | |
733 | if ((ctx->options & E2F_OPT_READONLY) || | |
734 | (sb->s_journal_inum == 0) || | |
735 | (sb->s_journal_inum == EXT2_JOURNAL_INO) || | |
736 | !(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) | |
737 | return; | |
738 | ||
739 | /* | |
740 | * If the filesystem is mounted, or we can't tell whether | |
741 | * or not it's mounted, do nothing. | |
742 | */ | |
743 | retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); | |
744 | if (retval || (mount_flags & EXT2_MF_MOUNTED)) | |
745 | return; | |
746 | ||
747 | /* | |
748 | * If we can't find the name of the journal inode, then do | |
749 | * nothing. | |
750 | */ | |
751 | for (cpp = journal_names; *cpp; cpp++) { | |
752 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp, | |
753 | strlen(*cpp), 0, &ino); | |
754 | if ((retval == 0) && (ino == sb->s_journal_inum)) | |
755 | break; | |
756 | } | |
757 | if (*cpp == 0) | |
758 | return; | |
759 | ||
760 | /* | |
761 | * The inode had better have only one link and not be readable. | |
762 | */ | |
763 | if (ext2fs_read_inode(fs, ino, &inode) != 0) | |
764 | return; | |
765 | if (inode.i_links_count != 1) | |
766 | return; | |
767 | ||
768 | /* We need the inode bitmap to be loaded */ | |
769 | retval = ext2fs_read_bitmaps(fs); | |
770 | if (retval) | |
771 | return; | |
772 | ||
773 | clear_problem_context(&pctx); | |
774 | pctx.str = *cpp; | |
775 | if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx)) | |
776 | return; | |
777 | ||
778 | /* | |
779 | * OK, we've done all the checks, let's actually move the | |
780 | * journal inode. Errors at this point mean we need to force | |
781 | * an ext2 filesystem check. | |
782 | */ | |
783 | if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0) | |
784 | goto err_out; | |
785 | if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0) | |
786 | goto err_out; | |
787 | sb->s_journal_inum = EXT2_JOURNAL_INO; | |
788 | ext2fs_mark_super_dirty(fs); | |
789 | inode.i_links_count = 0; | |
790 | inode.i_dtime = time(0); | |
791 | if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0) | |
792 | goto err_out; | |
793 | ||
794 | group = ext2fs_group_of_ino(fs, ino); | |
795 | ext2fs_unmark_inode_bitmap(fs->inode_map, ino); | |
796 | ext2fs_mark_ib_dirty(fs); | |
797 | fs->group_desc[group].bg_free_inodes_count++; | |
798 | fs->super->s_free_inodes_count++; | |
799 | return; | |
800 | ||
801 | err_out: | |
802 | pctx.errcode = retval; | |
803 | fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx); | |
804 | fs->super->s_state &= ~EXT2_VALID_FS; | |
805 | ext2fs_mark_super_dirty(fs); | |
806 | return; | |
807 | } | |
808 |