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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 | 15 | #ifdef HAVE_SYS_MOUNT_H |
b34cbddb | 16 | #include <sys/param.h> |
3b5386dc TT |
17 | #include <sys/mount.h> |
18 | #define MNT_FL (MS_MGC_VAL | MS_RDONLY) | |
19 | #endif | |
20 | #ifdef HAVE_SYS_STAT_H | |
21 | #include <sys/stat.h> | |
22 | #endif | |
17390c04 | 23 | |
53ef44c4 | 24 | #define E2FSCK_INCLUDE_INLINE_FUNCS |
0e8a9560 | 25 | #include "jfs_user.h" |
3b5386dc TT |
26 | #include "problem.h" |
27 | #include "uuid/uuid.h" | |
17390c04 | 28 | |
8cf93332 | 29 | #ifdef CONFIG_JBD_DEBUG /* Enabled by configure --enable-jfs-debug */ |
3b5386dc | 30 | static int bh_count = 0; |
3b5386dc TT |
31 | #endif |
32 | ||
d1a2182a TT |
33 | /* |
34 | * Define USE_INODE_IO to use the inode_io.c / fileio.c codepaths. | |
35 | * This creates a larger static binary, and a smaller binary using | |
36 | * shared libraries. It's also probably slightly less CPU-efficient, | |
37 | * which is why it's not on by default. But, it's a good way of | |
38 | * testing the functions in inode_io.c and fileio.c. | |
39 | */ | |
40 | #undef USE_INODE_IO | |
41 | ||
b2f93192 TT |
42 | /* Kernel compatibility functions for handling the journal. These allow us |
43 | * to use the recovery.c file virtually unchanged from the kernel, so we | |
44 | * don't have to do much to keep kernel and user recovery in sync. | |
45 | */ | |
8cf93332 | 46 | int journal_bmap(journal_t *journal, blk_t block, unsigned long *phys) |
3b5386dc | 47 | { |
d1a2182a TT |
48 | #ifdef USE_INODE_IO |
49 | *phys = block; | |
50 | return 0; | |
51 | #else | |
8cf93332 TT |
52 | struct inode *inode = journal->j_inode; |
53 | errcode_t retval; | |
54 | blk_t pblk; | |
3b5386dc | 55 | |
8cf93332 TT |
56 | if (!inode) { |
57 | *phys = block; | |
58 | return 0; | |
59 | } | |
3b5386dc | 60 | |
8cf93332 TT |
61 | retval= ext2fs_bmap(inode->i_ctx->fs, inode->i_ino, |
62 | &inode->i_ext2, NULL, 0, block, &pblk); | |
63 | *phys = pblk; | |
64 | return (retval); | |
d1a2182a | 65 | #endif |
3b5386dc TT |
66 | } |
67 | ||
8cf93332 | 68 | struct buffer_head *getblk(kdev_t kdev, blk_t blocknr, int blocksize) |
3b5386dc TT |
69 | { |
70 | struct buffer_head *bh; | |
71 | ||
8cf93332 | 72 | bh = e2fsck_allocate_memory(kdev->k_ctx, sizeof(*bh), "block buffer"); |
3b5386dc TT |
73 | if (!bh) |
74 | return NULL; | |
75 | ||
76 | jfs_debug(4, "getblk for block %lu (%d bytes)(total %d)\n", | |
53ef44c4 | 77 | (unsigned long) blocknr, blocksize, ++bh_count); |
3b5386dc | 78 | |
8cf93332 TT |
79 | bh->b_ctx = kdev->k_ctx; |
80 | if (kdev->k_dev == K_DEV_FS) | |
81 | bh->b_io = kdev->k_ctx->fs->io; | |
82 | else | |
83 | bh->b_io = kdev->k_ctx->journal_io; | |
3b5386dc TT |
84 | bh->b_size = blocksize; |
85 | bh->b_blocknr = blocknr; | |
86 | ||
87 | return bh; | |
88 | } | |
89 | ||
93effaa4 TT |
90 | void sync_blockdev(kdev_t kdev) |
91 | { | |
92 | io_channel io; | |
93 | ||
94 | if (kdev->k_dev == K_DEV_FS) | |
95 | io = kdev->k_ctx->fs->io; | |
96 | else | |
97 | io = kdev->k_ctx->journal_io; | |
98 | ||
99 | io_channel_flush(io); | |
100 | } | |
101 | ||
0e8a9560 | 102 | void ll_rw_block(int rw, int nr, struct buffer_head *bhp[]) |
3b5386dc TT |
103 | { |
104 | int retval; | |
0e8a9560 | 105 | struct buffer_head *bh; |
3b5386dc | 106 | |
0e8a9560 TT |
107 | for (; nr > 0; --nr) { |
108 | bh = *bhp++; | |
109 | if (rw == READ && !bh->b_uptodate) { | |
110 | jfs_debug(3, "reading block %lu/%p\n", | |
53ef44c4 | 111 | (unsigned long) bh->b_blocknr, (void *) bh); |
8cf93332 | 112 | retval = io_channel_read_blk(bh->b_io, |
0e8a9560 TT |
113 | bh->b_blocknr, |
114 | 1, bh->b_data); | |
115 | if (retval) { | |
116 | com_err(bh->b_ctx->device_name, retval, | |
54434927 TT |
117 | "while reading block %lu\n", |
118 | (unsigned long) bh->b_blocknr); | |
0e8a9560 TT |
119 | bh->b_err = retval; |
120 | continue; | |
121 | } | |
122 | bh->b_uptodate = 1; | |
123 | } else if (rw == WRITE && bh->b_dirty) { | |
124 | jfs_debug(3, "writing block %lu/%p\n", | |
53ef44c4 | 125 | (unsigned long) bh->b_blocknr, (void *) bh); |
8cf93332 | 126 | retval = io_channel_write_blk(bh->b_io, |
0e8a9560 TT |
127 | bh->b_blocknr, |
128 | 1, bh->b_data); | |
129 | if (retval) { | |
130 | com_err(bh->b_ctx->device_name, retval, | |
54434927 TT |
131 | "while writing block %lu\n", |
132 | (unsigned long) bh->b_blocknr); | |
0e8a9560 TT |
133 | bh->b_err = retval; |
134 | continue; | |
135 | } | |
136 | bh->b_dirty = 0; | |
137 | bh->b_uptodate = 1; | |
b969b1b8 | 138 | } else { |
0e8a9560 TT |
139 | jfs_debug(3, "no-op %s for block %lu\n", |
140 | rw == READ ? "read" : "write", | |
53ef44c4 | 141 | (unsigned long) bh->b_blocknr); |
b969b1b8 | 142 | } |
0e8a9560 | 143 | } |
3b5386dc TT |
144 | } |
145 | ||
8cf93332 | 146 | void mark_buffer_dirty(struct buffer_head *bh) |
3b5386dc | 147 | { |
8cf93332 | 148 | bh->b_dirty = 1; |
3b5386dc TT |
149 | } |
150 | ||
6a6d3d44 TT |
151 | static void mark_buffer_clean(struct buffer_head * bh) |
152 | { | |
153 | bh->b_dirty = 0; | |
154 | } | |
155 | ||
3b5386dc TT |
156 | void brelse(struct buffer_head *bh) |
157 | { | |
158 | if (bh->b_dirty) | |
0e8a9560 | 159 | ll_rw_block(WRITE, 1, &bh); |
3b5386dc | 160 | jfs_debug(3, "freeing block %lu/%p (total %d)\n", |
53ef44c4 | 161 | (unsigned long) bh->b_blocknr, (void *) bh, --bh_count); |
c4e3d3f3 | 162 | ext2fs_free_mem(&bh); |
3b5386dc TT |
163 | } |
164 | ||
165 | int buffer_uptodate(struct buffer_head *bh) | |
166 | { | |
167 | return bh->b_uptodate; | |
168 | } | |
169 | ||
15986f79 TT |
170 | void mark_buffer_uptodate(struct buffer_head *bh, int val) |
171 | { | |
172 | bh->b_uptodate = val; | |
173 | } | |
174 | ||
3b5386dc TT |
175 | void wait_on_buffer(struct buffer_head *bh) |
176 | { | |
177 | if (!bh->b_uptodate) | |
0e8a9560 | 178 | ll_rw_block(READ, 1, &bh); |
3b5386dc TT |
179 | } |
180 | ||
80bfaa3e | 181 | |
3b5386dc TT |
182 | static void e2fsck_clear_recover(e2fsck_t ctx, int error) |
183 | { | |
5dd8f963 | 184 | ctx->fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER; |
3b5386dc TT |
185 | |
186 | /* if we had an error doing journal recovery, we need a full fsck */ | |
187 | if (error) | |
5dd8f963 | 188 | ctx->fs->super->s_state &= ~EXT2_VALID_FS; |
3b5386dc TT |
189 | ext2fs_mark_super_dirty(ctx->fs); |
190 | } | |
191 | ||
051afbe0 TT |
192 | /* |
193 | * This is a helper function to check the validity of the journal. | |
194 | */ | |
195 | struct process_block_struct { | |
196 | e2_blkcnt_t last_block; | |
197 | }; | |
198 | ||
199 | static int process_journal_block(ext2_filsys fs, | |
200 | blk_t *block_nr, | |
201 | e2_blkcnt_t blockcnt, | |
202 | blk_t ref_block EXT2FS_ATTR((unused)), | |
203 | int ref_offset EXT2FS_ATTR((unused)), | |
204 | void *priv_data) | |
205 | { | |
206 | struct process_block_struct *p; | |
207 | blk_t blk = *block_nr; | |
208 | ||
209 | p = (struct process_block_struct *) priv_data; | |
210 | ||
211 | if (blk < fs->super->s_first_data_block || | |
212 | blk >= fs->super->s_blocks_count) | |
213 | return BLOCK_ABORT; | |
214 | ||
215 | if (blockcnt >= 0) | |
216 | p->last_block = blockcnt; | |
217 | return 0; | |
218 | } | |
219 | ||
d1a2182a | 220 | static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal) |
3b5386dc | 221 | { |
051afbe0 | 222 | struct process_block_struct pb; |
d1a2182a TT |
223 | struct ext2_super_block *sb = ctx->fs->super; |
224 | struct ext2_super_block jsuper; | |
225 | struct problem_context pctx; | |
226 | struct buffer_head *bh; | |
227 | struct inode *j_inode = NULL; | |
228 | struct kdev_s *dev_fs = NULL, *dev_journal; | |
3e699064 | 229 | const char *journal_name = 0; |
d1a2182a | 230 | journal_t *journal = NULL; |
3e699064 TT |
231 | errcode_t retval = 0; |
232 | io_manager io_ptr = 0; | |
d1a2182a | 233 | unsigned long start = 0; |
d1a2182a | 234 | int ext_journal = 0; |
a435ec34 | 235 | int tried_backup_jnl = 0; |
2bfe0bdb | 236 | |
d1a2182a | 237 | clear_problem_context(&pctx); |
2bfe0bdb | 238 | |
d1a2182a TT |
239 | journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); |
240 | if (!journal) { | |
3b5386dc TT |
241 | return EXT2_ET_NO_MEMORY; |
242 | } | |
243 | ||
8cf93332 TT |
244 | dev_fs = e2fsck_allocate_memory(ctx, 2*sizeof(struct kdev_s), "kdev"); |
245 | if (!dev_fs) { | |
246 | retval = EXT2_ET_NO_MEMORY; | |
247 | goto errout; | |
248 | } | |
249 | dev_journal = dev_fs+1; | |
2bfe0bdb | 250 | |
8cf93332 TT |
251 | dev_fs->k_ctx = dev_journal->k_ctx = ctx; |
252 | dev_fs->k_dev = K_DEV_FS; | |
253 | dev_journal->k_dev = K_DEV_JOURNAL; | |
2bfe0bdb | 254 | |
d1a2182a TT |
255 | journal->j_dev = dev_journal; |
256 | journal->j_fs_dev = dev_fs; | |
257 | journal->j_inode = NULL; | |
258 | journal->j_blocksize = ctx->fs->blocksize; | |
3b5386dc | 259 | |
d1a2182a | 260 | if (uuid_is_null(sb->s_journal_uuid)) { |
2bfe0bdb BB |
261 | if (!sb->s_journal_inum) { |
262 | retval = EXT2_ET_BAD_INODE_NUM; | |
263 | goto errout; | |
264 | } | |
d1a2182a TT |
265 | j_inode = e2fsck_allocate_memory(ctx, sizeof(*j_inode), |
266 | "journal inode"); | |
267 | if (!j_inode) { | |
268 | retval = EXT2_ET_NO_MEMORY; | |
269 | goto errout; | |
270 | } | |
3b5386dc | 271 | |
d1a2182a TT |
272 | j_inode->i_ctx = ctx; |
273 | j_inode->i_ino = sb->s_journal_inum; | |
2bfe0bdb | 274 | |
d1a2182a TT |
275 | if ((retval = ext2fs_read_inode(ctx->fs, |
276 | sb->s_journal_inum, | |
a435ec34 TT |
277 | &j_inode->i_ext2))) { |
278 | try_backup_journal: | |
279 | if (sb->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS || | |
280 | tried_backup_jnl) | |
281 | goto errout; | |
282 | memset(&j_inode->i_ext2, 0, sizeof(struct ext2_inode)); | |
283 | memcpy(&j_inode->i_ext2.i_block[0], sb->s_jnl_blocks, | |
284 | EXT2_N_BLOCKS*4); | |
285 | j_inode->i_ext2.i_size = sb->s_jnl_blocks[16]; | |
286 | j_inode->i_ext2.i_links_count = 1; | |
287 | j_inode->i_ext2.i_mode = LINUX_S_IFREG | 0600; | |
051afbe0 TT |
288 | e2fsck_use_inode_shortcuts(ctx, 1); |
289 | ctx->stashed_ino = j_inode->i_ino; | |
290 | ctx->stashed_inode = &j_inode->i_ext2; | |
a435ec34 TT |
291 | tried_backup_jnl++; |
292 | } | |
d1a2182a TT |
293 | if (!j_inode->i_ext2.i_links_count || |
294 | !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) { | |
295 | retval = EXT2_ET_NO_JOURNAL; | |
a435ec34 | 296 | goto try_backup_journal; |
d1a2182a TT |
297 | } |
298 | if (j_inode->i_ext2.i_size / journal->j_blocksize < | |
299 | JFS_MIN_JOURNAL_BLOCKS) { | |
300 | retval = EXT2_ET_JOURNAL_TOO_SMALL; | |
a435ec34 TT |
301 | goto try_backup_journal; |
302 | } | |
051afbe0 TT |
303 | pb.last_block = -1; |
304 | retval = ext2fs_block_iterate2(ctx->fs, j_inode->i_ino, | |
305 | BLOCK_FLAG_HOLE, 0, | |
306 | process_journal_block, &pb); | |
307 | if ((pb.last_block+1) * ctx->fs->blocksize < | |
308 | j_inode->i_ext2.i_size) { | |
309 | retval = EXT2_ET_JOURNAL_TOO_SMALL; | |
310 | goto try_backup_journal; | |
d1a2182a | 311 | } |
ded28ac2 KS |
312 | if (tried_backup_jnl && !(ctx->options & E2F_OPT_READONLY)) { |
313 | retval = ext2fs_write_inode(ctx->fs, sb->s_journal_inum, | |
314 | &j_inode->i_ext2); | |
315 | if (retval) | |
316 | goto errout; | |
317 | } | |
318 | ||
d1a2182a | 319 | journal->j_maxlen = j_inode->i_ext2.i_size / journal->j_blocksize; |
3b5386dc | 320 | |
d1a2182a | 321 | #ifdef USE_INODE_IO |
a435ec34 TT |
322 | retval = ext2fs_inode_io_intern2(ctx->fs, sb->s_journal_inum, |
323 | &j_inode->i_ext2, | |
324 | &journal_name); | |
d1a2182a TT |
325 | if (retval) |
326 | goto errout; | |
3b5386dc | 327 | |
d1a2182a TT |
328 | io_ptr = inode_io_manager; |
329 | #else | |
330 | journal->j_inode = j_inode; | |
331 | ctx->journal_io = ctx->fs->io; | |
332 | if ((retval = journal_bmap(journal, 0, &start)) != 0) | |
333 | goto errout; | |
334 | #endif | |
335 | } else { | |
336 | ext_journal = 1; | |
f364093b TT |
337 | if (!ctx->journal_name) { |
338 | char uuid[37]; | |
339 | ||
340 | uuid_unparse(sb->s_journal_uuid, uuid); | |
341 | ctx->journal_name = blkid_get_devname(ctx->blkid, | |
342 | "UUID", uuid); | |
343 | if (!ctx->journal_name) | |
344 | ctx->journal_name = blkid_devno_to_devname(sb->s_journal_dev); | |
d1a2182a | 345 | } |
f364093b | 346 | journal_name = ctx->journal_name; |
2bfe0bdb | 347 | |
d1a2182a TT |
348 | if (!journal_name) { |
349 | fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx); | |
2bfe0bdb BB |
350 | retval = EXT2_ET_LOAD_EXT_JOURNAL; |
351 | goto errout; | |
d1a2182a | 352 | } |
2bfe0bdb | 353 | |
d1a2182a TT |
354 | jfs_debug(1, "Using journal file %s\n", journal_name); |
355 | io_ptr = unix_io_manager; | |
3b5386dc TT |
356 | } |
357 | ||
d1a2182a TT |
358 | #if 0 |
359 | test_io_backing_manager = io_ptr; | |
adee8d75 | 360 | io_ptr = test_io_manager; |
adee8d75 | 361 | #endif |
d1a2182a TT |
362 | #ifndef USE_INODE_IO |
363 | if (ext_journal) | |
364 | #endif | |
365 | retval = io_ptr->open(journal_name, IO_FLAG_RW, | |
366 | &ctx->journal_io); | |
6d222f32 | 367 | if (retval) |
d1a2182a | 368 | goto errout; |
adee8d75 | 369 | |
d1a2182a TT |
370 | io_channel_set_blksize(ctx->journal_io, ctx->fs->blocksize); |
371 | ||
372 | if (ext_journal) { | |
373 | if (ctx->fs->blocksize == 1024) | |
374 | start = 1; | |
375 | bh = getblk(dev_journal, start, ctx->fs->blocksize); | |
376 | if (!bh) { | |
377 | retval = EXT2_ET_NO_MEMORY; | |
378 | goto errout; | |
379 | } | |
380 | ll_rw_block(READ, 1, &bh); | |
2aa362f5 TT |
381 | if ((retval = bh->b_err) != 0) { |
382 | brelse(bh); | |
d1a2182a | 383 | goto errout; |
2aa362f5 | 384 | } |
d1a2182a TT |
385 | memcpy(&jsuper, start ? bh->b_data : bh->b_data + 1024, |
386 | sizeof(jsuper)); | |
387 | brelse(bh); | |
2eae0930 | 388 | #ifdef WORDS_BIGENDIAN |
d1a2182a TT |
389 | if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC)) |
390 | ext2fs_swap_super(&jsuper); | |
adee8d75 | 391 | #endif |
d1a2182a TT |
392 | if (jsuper.s_magic != EXT2_SUPER_MAGIC || |
393 | !(jsuper.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
394 | fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx); | |
395 | retval = EXT2_ET_LOAD_EXT_JOURNAL; | |
396 | goto errout; | |
397 | } | |
398 | /* Make sure the journal UUID is correct */ | |
399 | if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid, | |
400 | sizeof(jsuper.s_uuid))) { | |
401 | fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx); | |
402 | retval = EXT2_ET_LOAD_EXT_JOURNAL; | |
403 | goto errout; | |
404 | } | |
2bfe0bdb | 405 | |
d1a2182a TT |
406 | journal->j_maxlen = jsuper.s_blocks_count; |
407 | start++; | |
3b5386dc TT |
408 | } |
409 | ||
d1a2182a | 410 | if (!(bh = getblk(dev_journal, start, journal->j_blocksize))) { |
adee8d75 TT |
411 | retval = EXT2_ET_NO_MEMORY; |
412 | goto errout; | |
413 | } | |
2bfe0bdb | 414 | |
d1a2182a TT |
415 | journal->j_sb_buffer = bh; |
416 | journal->j_superblock = (journal_superblock_t *)bh->b_data; | |
2bfe0bdb | 417 | |
d1a2182a TT |
418 | #ifdef USE_INODE_IO |
419 | if (j_inode) | |
c4e3d3f3 | 420 | ext2fs_free_mem(&j_inode); |
d1a2182a TT |
421 | #endif |
422 | ||
423 | *ret_journal = journal; | |
051afbe0 | 424 | e2fsck_use_inode_shortcuts(ctx, 0); |
adee8d75 TT |
425 | return 0; |
426 | ||
427 | errout: | |
051afbe0 | 428 | e2fsck_use_inode_shortcuts(ctx, 0); |
d1a2182a | 429 | if (dev_fs) |
c4e3d3f3 | 430 | ext2fs_free_mem(&dev_fs); |
d1a2182a | 431 | if (j_inode) |
c4e3d3f3 | 432 | ext2fs_free_mem(&j_inode); |
d1a2182a | 433 | if (journal) |
c4e3d3f3 | 434 | ext2fs_free_mem(&journal); |
adee8d75 | 435 | return retval; |
3b5386dc TT |
436 | } |
437 | ||
6a6d3d44 TT |
438 | static errcode_t e2fsck_journal_fix_bad_inode(e2fsck_t ctx, |
439 | struct problem_context *pctx) | |
3b5386dc | 440 | { |
5dd8f963 TT |
441 | struct ext2_super_block *sb = ctx->fs->super; |
442 | int recover = ctx->fs->super->s_feature_incompat & | |
443 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
444 | int has_journal = ctx->fs->super->s_feature_compat & | |
445 | EXT3_FEATURE_COMPAT_HAS_JOURNAL; | |
3b5386dc | 446 | |
5dd8f963 | 447 | if (has_journal || sb->s_journal_inum) { |
3b5386dc | 448 | /* The journal inode is bogus, remove and force full fsck */ |
7e92dfae | 449 | pctx->ino = sb->s_journal_inum; |
3b5386dc | 450 | if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) { |
5dd8f963 | 451 | if (has_journal && sb->s_journal_inum) |
3b5386dc TT |
452 | printf("*** ext3 journal has been deleted - " |
453 | "filesystem is now ext2 only ***\n\n"); | |
5dd8f963 TT |
454 | sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
455 | sb->s_journal_inum = 0; | |
5107d0d1 | 456 | ctx->flags |= E2F_FLAG_JOURNAL_INODE; |
0cfce7f7 | 457 | ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
3b5386dc TT |
458 | e2fsck_clear_recover(ctx, 1); |
459 | return 0; | |
460 | } | |
461 | return EXT2_ET_BAD_INODE_NUM; | |
462 | } else if (recover) { | |
463 | if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) { | |
464 | e2fsck_clear_recover(ctx, 1); | |
465 | return 0; | |
466 | } | |
467 | return EXT2_ET_UNSUPP_FEATURE; | |
468 | } | |
469 | return 0; | |
470 | } | |
471 | ||
62e3e7fe TT |
472 | #define V1_SB_SIZE 0x0024 |
473 | static void clear_v2_journal_fields(journal_t *journal) | |
474 | { | |
8cf93332 | 475 | e2fsck_t ctx = journal->j_dev->k_ctx; |
62e3e7fe TT |
476 | struct problem_context pctx; |
477 | ||
478 | clear_problem_context(&pctx); | |
479 | ||
480 | if (!fix_problem(ctx, PR_0_CLEAR_V2_JOURNAL, &pctx)) | |
481 | return; | |
482 | ||
483 | memset(((char *) journal->j_superblock) + V1_SB_SIZE, 0, | |
484 | ctx->fs->blocksize-V1_SB_SIZE); | |
8cf93332 | 485 | mark_buffer_dirty(journal->j_sb_buffer); |
62e3e7fe TT |
486 | } |
487 | ||
488 | ||
6a6d3d44 | 489 | static errcode_t e2fsck_journal_load(journal_t *journal) |
3b5386dc | 490 | { |
8cf93332 | 491 | e2fsck_t ctx = journal->j_dev->k_ctx; |
3b5386dc TT |
492 | journal_superblock_t *jsb; |
493 | struct buffer_head *jbh = journal->j_sb_buffer; | |
494 | struct problem_context pctx; | |
495 | ||
496 | clear_problem_context(&pctx); | |
497 | ||
0e8a9560 | 498 | ll_rw_block(READ, 1, &jbh); |
3b5386dc TT |
499 | if (jbh->b_err) { |
500 | com_err(ctx->device_name, jbh->b_err, | |
501 | _("reading journal superblock\n")); | |
502 | return jbh->b_err; | |
503 | } | |
504 | ||
505 | jsb = journal->j_superblock; | |
506 | /* If we don't even have JFS_MAGIC, we probably have a wrong inode */ | |
507 | if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER)) | |
508 | return e2fsck_journal_fix_bad_inode(ctx, &pctx); | |
509 | ||
0e8a9560 TT |
510 | switch (ntohl(jsb->s_header.h_blocktype)) { |
511 | case JFS_SUPERBLOCK_V1: | |
512 | journal->j_format_version = 1; | |
62e3e7fe TT |
513 | if (jsb->s_feature_compat || |
514 | jsb->s_feature_incompat || | |
515 | jsb->s_feature_ro_compat || | |
516 | jsb->s_nr_users) | |
517 | clear_v2_journal_fields(journal); | |
0e8a9560 TT |
518 | break; |
519 | ||
520 | case JFS_SUPERBLOCK_V2: | |
521 | journal->j_format_version = 2; | |
b3b3d465 | 522 | if (ntohl(jsb->s_nr_users) > 1 && |
a435ec34 | 523 | uuid_is_null(ctx->fs->super->s_journal_uuid)) |
62e3e7fe | 524 | clear_v2_journal_fields(journal); |
adee8d75 TT |
525 | if (ntohl(jsb->s_nr_users) > 1) { |
526 | fix_problem(ctx, PR_0_JOURNAL_UNSUPP_MULTIFS, &pctx); | |
527 | return EXT2_ET_JOURNAL_UNSUPP_VERSION; | |
528 | } | |
0e8a9560 | 529 | break; |
c7f23364 TT |
530 | |
531 | /* | |
532 | * These should never appear in a journal super block, so if | |
533 | * they do, the journal is badly corrupted. | |
534 | */ | |
535 | case JFS_DESCRIPTOR_BLOCK: | |
536 | case JFS_COMMIT_BLOCK: | |
537 | case JFS_REVOKE_BLOCK: | |
538 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
0e8a9560 TT |
539 | |
540 | /* If we don't understand the superblock major type, but there | |
541 | * is a magic number, then it is likely to be a new format we | |
542 | * just don't understand, so leave it alone. */ | |
543 | default: | |
c7f23364 | 544 | return EXT2_ET_JOURNAL_UNSUPP_VERSION; |
0e8a9560 TT |
545 | } |
546 | ||
2f686ace TT |
547 | if (JFS_HAS_INCOMPAT_FEATURE(journal, ~JFS_KNOWN_INCOMPAT_FEATURES)) |
548 | return EXT2_ET_UNSUPP_FEATURE; | |
424cd2be | 549 | |
2f686ace TT |
550 | if (JFS_HAS_RO_COMPAT_FEATURE(journal, ~JFS_KNOWN_ROCOMPAT_FEATURES)) |
551 | return EXT2_ET_RO_UNSUPP_FEATURE; | |
3b5386dc | 552 | |
0e8a9560 TT |
553 | /* We have now checked whether we know enough about the journal |
554 | * format to be able to proceed safely, so any other checks that | |
555 | * fail we should attempt to recover from. */ | |
556 | if (jsb->s_blocksize != htonl(journal->j_blocksize)) { | |
557 | com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, | |
558 | _("%s: no valid journal superblock found\n"), | |
559 | ctx->device_name); | |
560 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
3b5386dc TT |
561 | } |
562 | ||
563 | if (ntohl(jsb->s_maxlen) < journal->j_maxlen) | |
564 | journal->j_maxlen = ntohl(jsb->s_maxlen); | |
565 | else if (ntohl(jsb->s_maxlen) > journal->j_maxlen) { | |
0e8a9560 TT |
566 | com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, |
567 | _("%s: journal too short\n"), | |
568 | ctx->device_name); | |
3b5386dc TT |
569 | return EXT2_ET_CORRUPT_SUPERBLOCK; |
570 | } | |
571 | ||
572 | journal->j_tail_sequence = ntohl(jsb->s_sequence); | |
ecf1b776 | 573 | journal->j_transaction_sequence = journal->j_tail_sequence; |
3b5386dc TT |
574 | journal->j_tail = ntohl(jsb->s_start); |
575 | journal->j_first = ntohl(jsb->s_first); | |
576 | journal->j_last = ntohl(jsb->s_maxlen); | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
53ef44c4 | 581 | static void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb, |
6a6d3d44 | 582 | journal_t *journal) |
3b5386dc | 583 | { |
0e8a9560 | 584 | char *p; |
424cd2be TT |
585 | union { |
586 | uuid_t uuid; | |
587 | __u32 val[4]; | |
588 | } u; | |
589 | __u32 new_seq = 0; | |
590 | int i; | |
591 | ||
0e8a9560 TT |
592 | /* Leave a valid existing V1 superblock signature alone. |
593 | * Anything unrecognisable we overwrite with a new V2 | |
594 | * signature. */ | |
595 | ||
596 | if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER) || | |
597 | jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1)) { | |
598 | jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); | |
599 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); | |
600 | } | |
601 | ||
602 | /* Zero out everything else beyond the superblock header */ | |
603 | ||
604 | p = ((char *) jsb) + sizeof(journal_header_t); | |
605 | memset (p, 0, ctx->fs->blocksize-sizeof(journal_header_t)); | |
606 | ||
3b5386dc | 607 | jsb->s_blocksize = htonl(ctx->fs->blocksize); |
0e8a9560 TT |
608 | jsb->s_maxlen = htonl(journal->j_maxlen); |
609 | jsb->s_first = htonl(1); | |
0e8a9560 | 610 | |
424cd2be TT |
611 | /* Initialize the journal sequence number so that there is "no" |
612 | * chance we will find old "valid" transactions in the journal. | |
613 | * This avoids the need to zero the whole journal (slow to do, | |
614 | * and risky when we are just recovering the filesystem). | |
615 | */ | |
616 | uuid_generate(u.uuid); | |
617 | for (i = 0; i < 4; i ++) | |
618 | new_seq ^= u.val[i]; | |
619 | jsb->s_sequence = htonl(new_seq); | |
0e8a9560 | 620 | |
8cf93332 | 621 | mark_buffer_dirty(journal->j_sb_buffer); |
0e8a9560 | 622 | ll_rw_block(WRITE, 1, &journal->j_sb_buffer); |
3b5386dc TT |
623 | } |
624 | ||
6a6d3d44 TT |
625 | static errcode_t e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, |
626 | journal_t *journal, | |
627 | struct problem_context *pctx) | |
3b5386dc | 628 | { |
5dd8f963 TT |
629 | struct ext2_super_block *sb = ctx->fs->super; |
630 | int recover = ctx->fs->super->s_feature_incompat & | |
631 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc | 632 | |
5dd8f963 | 633 | if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) { |
3b5386dc | 634 | if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) { |
b2f93192 TT |
635 | e2fsck_journal_reset_super(ctx, journal->j_superblock, |
636 | journal); | |
3b5386dc TT |
637 | journal->j_transaction_sequence = 1; |
638 | e2fsck_clear_recover(ctx, recover); | |
639 | return 0; | |
640 | } | |
641 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
642 | } else if (e2fsck_journal_fix_bad_inode(ctx, pctx)) | |
643 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
6a6d3d44 TT |
648 | static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, |
649 | int reset, int drop) | |
3b5386dc TT |
650 | { |
651 | journal_superblock_t *jsb; | |
652 | ||
6a6d3d44 TT |
653 | if (drop) |
654 | mark_buffer_clean(journal->j_sb_buffer); | |
655 | else if (!(ctx->options & E2F_OPT_READONLY)) { | |
3b5386dc TT |
656 | jsb = journal->j_superblock; |
657 | jsb->s_sequence = htonl(journal->j_transaction_sequence); | |
658 | if (reset) | |
659 | jsb->s_start = 0; /* this marks the journal as empty */ | |
8cf93332 | 660 | mark_buffer_dirty(journal->j_sb_buffer); |
3b5386dc TT |
661 | } |
662 | brelse(journal->j_sb_buffer); | |
663 | ||
6d222f32 TT |
664 | if (ctx->journal_io) { |
665 | if (ctx->fs && ctx->fs->io != ctx->journal_io) | |
666 | io_channel_close(ctx->journal_io); | |
667 | ctx->journal_io = 0; | |
668 | } | |
669 | ||
d1a2182a | 670 | #ifndef USE_INODE_IO |
3b5386dc | 671 | if (journal->j_inode) |
c4e3d3f3 | 672 | ext2fs_free_mem(&journal->j_inode); |
d1a2182a TT |
673 | #endif |
674 | if (journal->j_fs_dev) | |
c4e3d3f3 TT |
675 | ext2fs_free_mem(&journal->j_fs_dev); |
676 | ext2fs_free_mem(&journal); | |
3b5386dc TT |
677 | } |
678 | ||
9b565759 TT |
679 | /* |
680 | * This function makes sure that the superblock fields regarding the | |
681 | * journal are consistent. | |
682 | */ | |
3b5386dc TT |
683 | int e2fsck_check_ext3_journal(e2fsck_t ctx) |
684 | { | |
5dd8f963 | 685 | struct ext2_super_block *sb = ctx->fs->super; |
3b5386dc | 686 | journal_t *journal; |
5dd8f963 TT |
687 | int recover = ctx->fs->super->s_feature_incompat & |
688 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc | 689 | struct problem_context pctx; |
d37066a9 | 690 | problem_t problem; |
d3f35b64 | 691 | int reset = 0, force_fsck = 0; |
3b5386dc TT |
692 | int retval; |
693 | ||
694 | /* If we don't have any journal features, don't do anything more */ | |
5dd8f963 TT |
695 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && |
696 | !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 && | |
697 | uuid_is_null(sb->s_journal_uuid)) | |
9b565759 | 698 | return 0; |
3b5386dc TT |
699 | |
700 | clear_problem_context(&pctx); | |
5dd8f963 | 701 | pctx.num = sb->s_journal_inum; |
3b5386dc TT |
702 | |
703 | retval = e2fsck_get_journal(ctx, &journal); | |
704 | if (retval) { | |
f2d5c937 | 705 | if ((retval == EXT2_ET_BAD_INODE_NUM) || |
6e4fbbeb | 706 | (retval == EXT2_ET_BAD_BLOCK_NUM) || |
f2d5c937 TT |
707 | (retval == EXT2_ET_JOURNAL_TOO_SMALL) || |
708 | (retval == EXT2_ET_NO_JOURNAL)) | |
3b5386dc TT |
709 | return e2fsck_journal_fix_bad_inode(ctx, &pctx); |
710 | return retval; | |
711 | } | |
712 | ||
713 | retval = e2fsck_journal_load(journal); | |
714 | if (retval) { | |
c7f23364 | 715 | if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) || |
2f686ace TT |
716 | ((retval == EXT2_ET_UNSUPP_FEATURE) && |
717 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT, | |
718 | &pctx))) || | |
719 | ((retval == EXT2_ET_RO_UNSUPP_FEATURE) && | |
720 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT, | |
721 | &pctx))) || | |
c7f23364 TT |
722 | ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) && |
723 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx)))) | |
6a6d3d44 TT |
724 | retval = e2fsck_journal_fix_corrupt_super(ctx, journal, |
725 | &pctx); | |
726 | e2fsck_journal_release(ctx, journal, 0, 1); | |
3b5386dc TT |
727 | return retval; |
728 | } | |
729 | ||
730 | /* | |
731 | * We want to make the flags consistent here. We will not leave with | |
732 | * needs_recovery set but has_journal clear. We can't get in a loop | |
733 | * with -y, -n, or -p, only if a user isn't making up their mind. | |
734 | */ | |
735 | no_has_journal: | |
5dd8f963 TT |
736 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { |
737 | recover = sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc TT |
738 | pctx.str = "inode"; |
739 | if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) { | |
740 | if (recover && | |
741 | !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx)) | |
742 | goto no_has_journal; | |
d3f35b64 TT |
743 | /* |
744 | * Need a full fsck if we are releasing a | |
8c2dc521 | 745 | * journal stored on a reserved inode. |
d3f35b64 TT |
746 | */ |
747 | force_fsck = recover || | |
748 | (sb->s_journal_inum < EXT2_FIRST_INODE(sb)); | |
749 | /* Clear all of the journal fields */ | |
5dd8f963 | 750 | sb->s_journal_inum = 0; |
d3f35b64 TT |
751 | sb->s_journal_dev = 0; |
752 | memset(sb->s_journal_uuid, 0, | |
753 | sizeof(sb->s_journal_uuid)); | |
754 | e2fsck_clear_recover(ctx, force_fsck); | |
3b5386dc | 755 | } else if (!(ctx->options & E2F_OPT_READONLY)) { |
5dd8f963 | 756 | sb->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
0cfce7f7 | 757 | ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
3b5386dc TT |
758 | ext2fs_mark_super_dirty(ctx->fs); |
759 | } | |
760 | } | |
761 | ||
5dd8f963 TT |
762 | if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL && |
763 | !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) && | |
3b5386dc | 764 | journal->j_superblock->s_start != 0) { |
d37066a9 TT |
765 | /* Print status information */ |
766 | fix_problem(ctx, PR_0_JOURNAL_RECOVERY_CLEAR, &pctx); | |
767 | if (ctx->superblock) | |
768 | problem = PR_0_JOURNAL_RUN_DEFAULT; | |
769 | else | |
770 | problem = PR_0_JOURNAL_RUN; | |
771 | if (fix_problem(ctx, problem, &pctx)) { | |
772 | ctx->options |= E2F_OPT_FORCE; | |
773 | sb->s_feature_incompat |= | |
774 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
775 | ext2fs_mark_super_dirty(ctx->fs); | |
776 | } else if (fix_problem(ctx, | |
777 | PR_0_JOURNAL_RESET_JOURNAL, &pctx)) { | |
3b5386dc | 778 | reset = 1; |
d3f35b64 TT |
779 | sb->s_state &= ~EXT2_VALID_FS; |
780 | ext2fs_mark_super_dirty(ctx->fs); | |
781 | } | |
782 | /* | |
783 | * If the user answers no to the above question, we | |
784 | * ignore the fact that journal apparently has data; | |
785 | * accidentally replaying over valid data would be far | |
786 | * worse than skipping a questionable recovery. | |
787 | * | |
788 | * XXX should we abort with a fatal error here? What | |
789 | * will the ext3 kernel code do if a filesystem with | |
790 | * !NEEDS_RECOVERY but with a non-zero | |
791 | * journal->j_superblock->s_start is mounted? | |
792 | */ | |
3b5386dc TT |
793 | } |
794 | ||
6a6d3d44 | 795 | e2fsck_journal_release(ctx, journal, reset, 0); |
3b5386dc TT |
796 | return retval; |
797 | } | |
798 | ||
6a6d3d44 | 799 | static errcode_t recover_ext3_journal(e2fsck_t ctx) |
3b5386dc | 800 | { |
3b5386dc TT |
801 | journal_t *journal; |
802 | int retval; | |
803 | ||
8cf93332 | 804 | journal_init_revoke_caches(); |
3b5386dc TT |
805 | retval = e2fsck_get_journal(ctx, &journal); |
806 | if (retval) | |
ecf1b776 TT |
807 | return retval; |
808 | ||
3b5386dc TT |
809 | retval = e2fsck_journal_load(journal); |
810 | if (retval) | |
6a6d3d44 | 811 | goto errout; |
3b5386dc | 812 | |
0e8a9560 TT |
813 | retval = journal_init_revoke(journal, 1024); |
814 | if (retval) | |
6a6d3d44 | 815 | goto errout; |
0e8a9560 | 816 | |
3b5386dc | 817 | retval = -journal_recover(journal); |
c0a083fa TT |
818 | if (retval) |
819 | goto errout; | |
820 | ||
821 | if (journal->j_superblock->s_errno) { | |
822 | ctx->fs->super->s_state |= EXT2_ERROR_FS; | |
823 | ext2fs_mark_super_dirty(ctx->fs); | |
824 | journal->j_superblock->s_errno = 0; | |
8cf93332 | 825 | mark_buffer_dirty(journal->j_sb_buffer); |
c0a083fa TT |
826 | } |
827 | ||
6a6d3d44 | 828 | errout: |
d1a2182a | 829 | journal_destroy_revoke(journal); |
8cf93332 | 830 | journal_destroy_revoke_caches(); |
6a6d3d44 | 831 | e2fsck_journal_release(ctx, journal, 1, 0); |
3b5386dc TT |
832 | return retval; |
833 | } | |
834 | ||
80bfaa3e TT |
835 | int e2fsck_run_ext3_journal(e2fsck_t ctx) |
836 | { | |
837 | io_manager io_ptr = ctx->fs->io->manager; | |
838 | int blocksize = ctx->fs->blocksize; | |
ecf1b776 | 839 | errcode_t retval, recover_retval; |
8394902e TT |
840 | |
841 | printf(_("%s: recovering journal\n"), ctx->device_name); | |
ecf1b776 | 842 | if (ctx->options & E2F_OPT_READONLY) { |
8394902e | 843 | printf(_("%s: won't do journal recovery while read-only\n"), |
ecf1b776 TT |
844 | ctx->device_name); |
845 | return EXT2_ET_FILE_RO; | |
846 | } | |
847 | ||
0f2cfe25 | 848 | if (ctx->fs->flags & EXT2_FLAG_DIRTY) |
3c6b8977 | 849 | ext2fs_flush(ctx->fs); /* Force out any modifications */ |
d0515212 | 850 | |
ecf1b776 | 851 | recover_retval = recover_ext3_journal(ctx); |
80bfaa3e TT |
852 | |
853 | /* | |
854 | * Reload the filesystem context to get up-to-date data from disk | |
855 | * because journal recovery will change the filesystem under us. | |
856 | */ | |
857 | ext2fs_close(ctx->fs); | |
ecf1b776 | 858 | retval = ext2fs_open(ctx->filesystem_name, EXT2_FLAG_RW, |
80bfaa3e TT |
859 | ctx->superblock, blocksize, io_ptr, |
860 | &ctx->fs); | |
861 | ||
862 | if (retval) { | |
863 | com_err(ctx->program_name, retval, | |
864 | _("while trying to re-open %s"), | |
865 | ctx->device_name); | |
99a2cc96 | 866 | fatal_error(ctx, 0); |
80bfaa3e TT |
867 | } |
868 | ctx->fs->priv_data = ctx; | |
8dceb924 | 869 | ctx->fs->now = ctx->now; |
058ad1c7 | 870 | ctx->fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
17390c04 | 871 | |
ecf1b776 TT |
872 | /* Set the superblock flags */ |
873 | e2fsck_clear_recover(ctx, recover_retval); | |
874 | return recover_retval; | |
17390c04 | 875 | } |
773fd8a1 TT |
876 | |
877 | /* | |
878 | * This function will move the journal inode from a visible file in | |
879 | * the filesystem directory hierarchy to the reserved inode if necessary. | |
880 | */ | |
546a1ff1 | 881 | static const char * const journal_names[] = { |
773fd8a1 TT |
882 | ".journal", "journal", ".journal.dat", "journal.dat", 0 }; |
883 | ||
884 | void e2fsck_move_ext3_journal(e2fsck_t ctx) | |
885 | { | |
886 | struct ext2_super_block *sb = ctx->fs->super; | |
887 | struct problem_context pctx; | |
888 | struct ext2_inode inode; | |
889 | ext2_filsys fs = ctx->fs; | |
890 | ext2_ino_t ino; | |
891 | errcode_t retval; | |
892 | const char * const * cpp; | |
893 | int group, mount_flags; | |
894 | ||
a435ec34 TT |
895 | clear_problem_context(&pctx); |
896 | ||
773fd8a1 TT |
897 | /* |
898 | * If the filesystem is opened read-only, or there is no | |
a435ec34 | 899 | * journal, then do nothing. |
773fd8a1 TT |
900 | */ |
901 | if ((ctx->options & E2F_OPT_READONLY) || | |
902 | (sb->s_journal_inum == 0) || | |
773fd8a1 TT |
903 | !(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) |
904 | return; | |
905 | ||
a435ec34 TT |
906 | /* |
907 | * Read in the journal inode | |
908 | */ | |
909 | if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0) | |
910 | return; | |
911 | ||
912 | /* | |
913 | * If it's necessary to backup the journal inode, do so. | |
914 | */ | |
915 | if ((sb->s_jnl_backup_type == 0) || | |
916 | ((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) && | |
917 | memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) { | |
918 | if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) { | |
919 | memcpy(sb->s_jnl_blocks, inode.i_block, | |
920 | EXT2_N_BLOCKS*4); | |
921 | sb->s_jnl_blocks[16] = inode.i_size; | |
922 | sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; | |
923 | ext2fs_mark_super_dirty(fs); | |
27479eb2 | 924 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
a435ec34 TT |
925 | } |
926 | } | |
927 | ||
928 | /* | |
929 | * If the journal is already the hidden inode, then do nothing | |
930 | */ | |
931 | if (sb->s_journal_inum == EXT2_JOURNAL_INO) | |
932 | return; | |
933 | ||
934 | /* | |
935 | * The journal inode had better have only one link and not be readable. | |
936 | */ | |
937 | if (inode.i_links_count != 1) | |
938 | return; | |
939 | ||
773fd8a1 TT |
940 | /* |
941 | * If the filesystem is mounted, or we can't tell whether | |
942 | * or not it's mounted, do nothing. | |
943 | */ | |
944 | retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); | |
945 | if (retval || (mount_flags & EXT2_MF_MOUNTED)) | |
946 | return; | |
947 | ||
948 | /* | |
949 | * If we can't find the name of the journal inode, then do | |
950 | * nothing. | |
951 | */ | |
952 | for (cpp = journal_names; *cpp; cpp++) { | |
953 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp, | |
954 | strlen(*cpp), 0, &ino); | |
955 | if ((retval == 0) && (ino == sb->s_journal_inum)) | |
956 | break; | |
957 | } | |
958 | if (*cpp == 0) | |
959 | return; | |
960 | ||
773fd8a1 TT |
961 | /* We need the inode bitmap to be loaded */ |
962 | retval = ext2fs_read_bitmaps(fs); | |
963 | if (retval) | |
964 | return; | |
965 | ||
773fd8a1 TT |
966 | pctx.str = *cpp; |
967 | if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx)) | |
968 | return; | |
969 | ||
970 | /* | |
971 | * OK, we've done all the checks, let's actually move the | |
972 | * journal inode. Errors at this point mean we need to force | |
973 | * an ext2 filesystem check. | |
974 | */ | |
975 | if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0) | |
976 | goto err_out; | |
977 | if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0) | |
978 | goto err_out; | |
979 | sb->s_journal_inum = EXT2_JOURNAL_INO; | |
980 | ext2fs_mark_super_dirty(fs); | |
27479eb2 | 981 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
773fd8a1 | 982 | inode.i_links_count = 0; |
1f3ad14a | 983 | inode.i_dtime = ctx->now; |
773fd8a1 TT |
984 | if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0) |
985 | goto err_out; | |
986 | ||
987 | group = ext2fs_group_of_ino(fs, ino); | |
988 | ext2fs_unmark_inode_bitmap(fs->inode_map, ino); | |
989 | ext2fs_mark_ib_dirty(fs); | |
990 | fs->group_desc[group].bg_free_inodes_count++; | |
991 | fs->super->s_free_inodes_count++; | |
992 | return; | |
993 | ||
994 | err_out: | |
995 | pctx.errcode = retval; | |
996 | fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx); | |
997 | fs->super->s_state &= ~EXT2_VALID_FS; | |
998 | ext2fs_mark_super_dirty(fs); | |
999 | return; | |
1000 | } | |
1001 | ||
b1c52b26 TT |
1002 | /* |
1003 | * This function makes sure the superblock hint for the external | |
1004 | * journal is correct. | |
1005 | */ | |
1006 | int e2fsck_fix_ext3_journal_hint(e2fsck_t ctx) | |
1007 | { | |
1008 | struct ext2_super_block *sb = ctx->fs->super; | |
1009 | struct problem_context pctx; | |
1010 | char uuid[37], *journal_name; | |
1011 | struct stat st; | |
b1c52b26 TT |
1012 | |
1013 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) || | |
1014 | uuid_is_null(sb->s_journal_uuid)) | |
1015 | return 0; | |
1016 | ||
1017 | uuid_unparse(sb->s_journal_uuid, uuid); | |
1018 | journal_name = blkid_get_devname(ctx->blkid, "UUID", uuid); | |
1019 | if (!journal_name) | |
1020 | return 0; | |
1021 | ||
1022 | if (stat(journal_name, &st) < 0) | |
1023 | return 0; | |
1024 | ||
1025 | if (st.st_rdev != sb->s_journal_dev) { | |
1026 | clear_problem_context(&pctx); | |
1027 | pctx.num = st.st_rdev; | |
1028 | if (fix_problem(ctx, PR_0_EXTERNAL_JOURNAL_HINT, &pctx)) { | |
1029 | sb->s_journal_dev = st.st_rdev; | |
1030 | ext2fs_mark_super_dirty(ctx->fs); | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | free(journal_name); | |
1035 | return 0; | |
1036 | } |