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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 | ||
d1154eb4 | 15 | #include "config.h" |
3b5386dc | 16 | #ifdef HAVE_SYS_MOUNT_H |
b34cbddb | 17 | #include <sys/param.h> |
3b5386dc TT |
18 | #include <sys/mount.h> |
19 | #define MNT_FL (MS_MGC_VAL | MS_RDONLY) | |
20 | #endif | |
21 | #ifdef HAVE_SYS_STAT_H | |
22 | #include <sys/stat.h> | |
23 | #endif | |
17390c04 | 24 | |
53ef44c4 | 25 | #define E2FSCK_INCLUDE_INLINE_FUNCS |
0e8a9560 | 26 | #include "jfs_user.h" |
3b5386dc TT |
27 | #include "problem.h" |
28 | #include "uuid/uuid.h" | |
17390c04 | 29 | |
8cf93332 | 30 | #ifdef CONFIG_JBD_DEBUG /* Enabled by configure --enable-jfs-debug */ |
3b5386dc | 31 | static int bh_count = 0; |
3b5386dc TT |
32 | #endif |
33 | ||
d1a2182a TT |
34 | /* |
35 | * Define USE_INODE_IO to use the inode_io.c / fileio.c codepaths. | |
36 | * This creates a larger static binary, and a smaller binary using | |
37 | * shared libraries. It's also probably slightly less CPU-efficient, | |
38 | * which is why it's not on by default. But, it's a good way of | |
39 | * testing the functions in inode_io.c and fileio.c. | |
40 | */ | |
41 | #undef USE_INODE_IO | |
42 | ||
b2795949 | 43 | /* Checksumming functions */ |
fd9ca825 TT |
44 | static int e2fsck_journal_verify_csum_type(journal_t *j, |
45 | journal_superblock_t *jsb) | |
b2795949 DW |
46 | { |
47 | if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2)) | |
48 | return 1; | |
49 | ||
50 | return jsb->s_checksum_type == JBD2_CRC32C_CHKSUM; | |
51 | } | |
52 | ||
fd9ca825 | 53 | static __u32 e2fsck_journal_sb_csum(journal_superblock_t *jsb) |
b2795949 DW |
54 | { |
55 | __u32 crc, old_crc; | |
56 | ||
57 | old_crc = jsb->s_checksum; | |
58 | jsb->s_checksum = 0; | |
59 | crc = ext2fs_crc32c_le(~0, (unsigned char *)jsb, | |
60 | sizeof(journal_superblock_t)); | |
61 | jsb->s_checksum = old_crc; | |
62 | ||
63 | return crc; | |
64 | } | |
65 | ||
fd9ca825 TT |
66 | static int e2fsck_journal_sb_csum_verify(journal_t *j, |
67 | journal_superblock_t *jsb) | |
b2795949 DW |
68 | { |
69 | __u32 provided, calculated; | |
70 | ||
71 | if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2)) | |
72 | return 1; | |
73 | ||
74 | provided = ext2fs_be32_to_cpu(jsb->s_checksum); | |
fd9ca825 | 75 | calculated = e2fsck_journal_sb_csum(jsb); |
b2795949 DW |
76 | |
77 | return provided == calculated; | |
78 | } | |
79 | ||
fd9ca825 TT |
80 | static errcode_t e2fsck_journal_sb_csum_set(journal_t *j, |
81 | journal_superblock_t *jsb) | |
b2795949 DW |
82 | { |
83 | __u32 crc; | |
84 | ||
85 | if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2)) | |
86 | return 0; | |
87 | ||
fd9ca825 | 88 | crc = e2fsck_journal_sb_csum(jsb); |
b2795949 DW |
89 | jsb->s_checksum = ext2fs_cpu_to_be32(crc); |
90 | return 0; | |
91 | } | |
92 | ||
b2f93192 TT |
93 | /* Kernel compatibility functions for handling the journal. These allow us |
94 | * to use the recovery.c file virtually unchanged from the kernel, so we | |
95 | * don't have to do much to keep kernel and user recovery in sync. | |
96 | */ | |
3b693d0b | 97 | int journal_bmap(journal_t *journal, blk64_t block, unsigned long long *phys) |
3b5386dc | 98 | { |
d1a2182a TT |
99 | #ifdef USE_INODE_IO |
100 | *phys = block; | |
101 | return 0; | |
102 | #else | |
8cf93332 TT |
103 | struct inode *inode = journal->j_inode; |
104 | errcode_t retval; | |
6dc64392 | 105 | blk64_t pblk; |
3b5386dc | 106 | |
8cf93332 TT |
107 | if (!inode) { |
108 | *phys = block; | |
109 | return 0; | |
110 | } | |
3b5386dc | 111 | |
6dc64392 VAH |
112 | retval= ext2fs_bmap2(inode->i_ctx->fs, inode->i_ino, |
113 | &inode->i_ext2, NULL, 0, block, 0, &pblk); | |
8cf93332 | 114 | *phys = pblk; |
974d57d3 | 115 | return (int) retval; |
d1a2182a | 116 | #endif |
3b5386dc TT |
117 | } |
118 | ||
6dc64392 | 119 | struct buffer_head *getblk(kdev_t kdev, blk64_t blocknr, int blocksize) |
3b5386dc TT |
120 | { |
121 | struct buffer_head *bh; | |
e35d548b TT |
122 | int bufsize = sizeof(*bh) + kdev->k_ctx->fs->blocksize - |
123 | sizeof(bh->b_data); | |
3b5386dc | 124 | |
e35d548b | 125 | bh = e2fsck_allocate_memory(kdev->k_ctx, bufsize, "block buffer"); |
3b5386dc TT |
126 | if (!bh) |
127 | return NULL; | |
128 | ||
185c4aea TT |
129 | #ifdef CONFIG_JBD_DEBUG |
130 | if (journal_enable_debug >= 3) | |
131 | bh_count++; | |
132 | #endif | |
3b693d0b TT |
133 | jfs_debug(4, "getblk for block %llu (%d bytes)(total %d)\n", |
134 | (unsigned long long) blocknr, blocksize, bh_count); | |
3b5386dc | 135 | |
8cf93332 TT |
136 | bh->b_ctx = kdev->k_ctx; |
137 | if (kdev->k_dev == K_DEV_FS) | |
138 | bh->b_io = kdev->k_ctx->fs->io; | |
efc6f628 | 139 | else |
8cf93332 | 140 | bh->b_io = kdev->k_ctx->journal_io; |
3b5386dc TT |
141 | bh->b_size = blocksize; |
142 | bh->b_blocknr = blocknr; | |
143 | ||
144 | return bh; | |
145 | } | |
146 | ||
13af4b93 | 147 | int sync_blockdev(kdev_t kdev) |
93effaa4 TT |
148 | { |
149 | io_channel io; | |
150 | ||
151 | if (kdev->k_dev == K_DEV_FS) | |
152 | io = kdev->k_ctx->fs->io; | |
efc6f628 | 153 | else |
93effaa4 TT |
154 | io = kdev->k_ctx->journal_io; |
155 | ||
13af4b93 | 156 | return io_channel_flush(io) ? EIO : 0; |
93effaa4 TT |
157 | } |
158 | ||
0e8a9560 | 159 | void ll_rw_block(int rw, int nr, struct buffer_head *bhp[]) |
3b5386dc | 160 | { |
974d57d3 | 161 | errcode_t retval; |
0e8a9560 | 162 | struct buffer_head *bh; |
3b5386dc | 163 | |
0e8a9560 TT |
164 | for (; nr > 0; --nr) { |
165 | bh = *bhp++; | |
166 | if (rw == READ && !bh->b_uptodate) { | |
3b693d0b TT |
167 | jfs_debug(3, "reading block %llu/%p\n", |
168 | bh->b_blocknr, (void *) bh); | |
24a117ab | 169 | retval = io_channel_read_blk64(bh->b_io, |
0e8a9560 TT |
170 | bh->b_blocknr, |
171 | 1, bh->b_data); | |
172 | if (retval) { | |
173 | com_err(bh->b_ctx->device_name, retval, | |
3b693d0b TT |
174 | "while reading block %llu\n", |
175 | bh->b_blocknr); | |
974d57d3 | 176 | bh->b_err = (int) retval; |
0e8a9560 TT |
177 | continue; |
178 | } | |
179 | bh->b_uptodate = 1; | |
180 | } else if (rw == WRITE && bh->b_dirty) { | |
3b693d0b TT |
181 | jfs_debug(3, "writing block %llu/%p\n", |
182 | bh->b_blocknr, | |
183 | (void *) bh); | |
24a117ab | 184 | retval = io_channel_write_blk64(bh->b_io, |
0e8a9560 TT |
185 | bh->b_blocknr, |
186 | 1, bh->b_data); | |
187 | if (retval) { | |
188 | com_err(bh->b_ctx->device_name, retval, | |
3b693d0b TT |
189 | "while writing block %llu\n", |
190 | bh->b_blocknr); | |
974d57d3 | 191 | bh->b_err = (int) retval; |
0e8a9560 TT |
192 | continue; |
193 | } | |
194 | bh->b_dirty = 0; | |
195 | bh->b_uptodate = 1; | |
b969b1b8 | 196 | } else { |
3b693d0b | 197 | jfs_debug(3, "no-op %s for block %llu\n", |
efc6f628 | 198 | rw == READ ? "read" : "write", |
3b693d0b | 199 | bh->b_blocknr); |
b969b1b8 | 200 | } |
0e8a9560 | 201 | } |
3b5386dc TT |
202 | } |
203 | ||
8cf93332 | 204 | void mark_buffer_dirty(struct buffer_head *bh) |
3b5386dc | 205 | { |
8cf93332 | 206 | bh->b_dirty = 1; |
3b5386dc TT |
207 | } |
208 | ||
6a6d3d44 TT |
209 | static void mark_buffer_clean(struct buffer_head * bh) |
210 | { | |
211 | bh->b_dirty = 0; | |
212 | } | |
213 | ||
3b5386dc TT |
214 | void brelse(struct buffer_head *bh) |
215 | { | |
216 | if (bh->b_dirty) | |
0e8a9560 | 217 | ll_rw_block(WRITE, 1, &bh); |
3b693d0b TT |
218 | jfs_debug(3, "freeing block %llu/%p (total %d)\n", |
219 | bh->b_blocknr, (void *) bh, --bh_count); | |
c4e3d3f3 | 220 | ext2fs_free_mem(&bh); |
3b5386dc TT |
221 | } |
222 | ||
223 | int buffer_uptodate(struct buffer_head *bh) | |
224 | { | |
225 | return bh->b_uptodate; | |
226 | } | |
227 | ||
15986f79 TT |
228 | void mark_buffer_uptodate(struct buffer_head *bh, int val) |
229 | { | |
230 | bh->b_uptodate = val; | |
231 | } | |
232 | ||
3b5386dc TT |
233 | void wait_on_buffer(struct buffer_head *bh) |
234 | { | |
235 | if (!bh->b_uptodate) | |
0e8a9560 | 236 | ll_rw_block(READ, 1, &bh); |
3b5386dc TT |
237 | } |
238 | ||
80bfaa3e | 239 | |
3b5386dc TT |
240 | static void e2fsck_clear_recover(e2fsck_t ctx, int error) |
241 | { | |
5dd8f963 | 242 | ctx->fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER; |
3b5386dc TT |
243 | |
244 | /* if we had an error doing journal recovery, we need a full fsck */ | |
245 | if (error) | |
5dd8f963 | 246 | ctx->fs->super->s_state &= ~EXT2_VALID_FS; |
3b5386dc TT |
247 | ext2fs_mark_super_dirty(ctx->fs); |
248 | } | |
249 | ||
051afbe0 TT |
250 | /* |
251 | * This is a helper function to check the validity of the journal. | |
252 | */ | |
253 | struct process_block_struct { | |
254 | e2_blkcnt_t last_block; | |
255 | }; | |
256 | ||
257 | static int process_journal_block(ext2_filsys fs, | |
6dc64392 | 258 | blk64_t *block_nr, |
051afbe0 | 259 | e2_blkcnt_t blockcnt, |
6dc64392 | 260 | blk64_t ref_block EXT2FS_ATTR((unused)), |
051afbe0 TT |
261 | int ref_offset EXT2FS_ATTR((unused)), |
262 | void *priv_data) | |
263 | { | |
264 | struct process_block_struct *p; | |
6dc64392 | 265 | blk64_t blk = *block_nr; |
051afbe0 TT |
266 | |
267 | p = (struct process_block_struct *) priv_data; | |
268 | ||
5750e5f9 | 269 | if (!blk || blk < fs->super->s_first_data_block || |
4efbac6f | 270 | blk >= ext2fs_blocks_count(fs->super)) |
051afbe0 TT |
271 | return BLOCK_ABORT; |
272 | ||
273 | if (blockcnt >= 0) | |
274 | p->last_block = blockcnt; | |
275 | return 0; | |
276 | } | |
277 | ||
d1a2182a | 278 | static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal) |
3b5386dc | 279 | { |
051afbe0 | 280 | struct process_block_struct pb; |
d1a2182a TT |
281 | struct ext2_super_block *sb = ctx->fs->super; |
282 | struct ext2_super_block jsuper; | |
283 | struct problem_context pctx; | |
284 | struct buffer_head *bh; | |
285 | struct inode *j_inode = NULL; | |
286 | struct kdev_s *dev_fs = NULL, *dev_journal; | |
3e699064 | 287 | const char *journal_name = 0; |
d1a2182a | 288 | journal_t *journal = NULL; |
3e699064 TT |
289 | errcode_t retval = 0; |
290 | io_manager io_ptr = 0; | |
3b693d0b | 291 | unsigned long long start = 0; |
d1a2182a | 292 | int ext_journal = 0; |
a435ec34 | 293 | int tried_backup_jnl = 0; |
2bfe0bdb | 294 | |
d1a2182a | 295 | clear_problem_context(&pctx); |
2bfe0bdb | 296 | |
d1a2182a TT |
297 | journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal"); |
298 | if (!journal) { | |
3b5386dc TT |
299 | return EXT2_ET_NO_MEMORY; |
300 | } | |
301 | ||
8cf93332 TT |
302 | dev_fs = e2fsck_allocate_memory(ctx, 2*sizeof(struct kdev_s), "kdev"); |
303 | if (!dev_fs) { | |
304 | retval = EXT2_ET_NO_MEMORY; | |
305 | goto errout; | |
306 | } | |
307 | dev_journal = dev_fs+1; | |
2bfe0bdb | 308 | |
8cf93332 TT |
309 | dev_fs->k_ctx = dev_journal->k_ctx = ctx; |
310 | dev_fs->k_dev = K_DEV_FS; | |
311 | dev_journal->k_dev = K_DEV_JOURNAL; | |
2bfe0bdb | 312 | |
d1a2182a TT |
313 | journal->j_dev = dev_journal; |
314 | journal->j_fs_dev = dev_fs; | |
315 | journal->j_inode = NULL; | |
316 | journal->j_blocksize = ctx->fs->blocksize; | |
3b5386dc | 317 | |
d1a2182a | 318 | if (uuid_is_null(sb->s_journal_uuid)) { |
2bfe0bdb BB |
319 | if (!sb->s_journal_inum) { |
320 | retval = EXT2_ET_BAD_INODE_NUM; | |
321 | goto errout; | |
322 | } | |
d1a2182a TT |
323 | j_inode = e2fsck_allocate_memory(ctx, sizeof(*j_inode), |
324 | "journal inode"); | |
325 | if (!j_inode) { | |
326 | retval = EXT2_ET_NO_MEMORY; | |
327 | goto errout; | |
328 | } | |
3b5386dc | 329 | |
d1a2182a TT |
330 | j_inode->i_ctx = ctx; |
331 | j_inode->i_ino = sb->s_journal_inum; | |
2bfe0bdb | 332 | |
d1a2182a TT |
333 | if ((retval = ext2fs_read_inode(ctx->fs, |
334 | sb->s_journal_inum, | |
a435ec34 TT |
335 | &j_inode->i_ext2))) { |
336 | try_backup_journal: | |
337 | if (sb->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS || | |
338 | tried_backup_jnl) | |
339 | goto errout; | |
340 | memset(&j_inode->i_ext2, 0, sizeof(struct ext2_inode)); | |
efc6f628 | 341 | memcpy(&j_inode->i_ext2.i_block[0], sb->s_jnl_blocks, |
a435ec34 | 342 | EXT2_N_BLOCKS*4); |
931b58e1 | 343 | j_inode->i_ext2.i_size_high = sb->s_jnl_blocks[15]; |
a435ec34 TT |
344 | j_inode->i_ext2.i_size = sb->s_jnl_blocks[16]; |
345 | j_inode->i_ext2.i_links_count = 1; | |
346 | j_inode->i_ext2.i_mode = LINUX_S_IFREG | 0600; | |
051afbe0 TT |
347 | e2fsck_use_inode_shortcuts(ctx, 1); |
348 | ctx->stashed_ino = j_inode->i_ino; | |
349 | ctx->stashed_inode = &j_inode->i_ext2; | |
a435ec34 TT |
350 | tried_backup_jnl++; |
351 | } | |
d1a2182a TT |
352 | if (!j_inode->i_ext2.i_links_count || |
353 | !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) { | |
354 | retval = EXT2_ET_NO_JOURNAL; | |
a435ec34 | 355 | goto try_backup_journal; |
d1a2182a | 356 | } |
931b58e1 | 357 | if (EXT2_I_SIZE(&j_inode->i_ext2) / journal->j_blocksize < |
d1a2182a TT |
358 | JFS_MIN_JOURNAL_BLOCKS) { |
359 | retval = EXT2_ET_JOURNAL_TOO_SMALL; | |
a435ec34 TT |
360 | goto try_backup_journal; |
361 | } | |
051afbe0 | 362 | pb.last_block = -1; |
6dc64392 | 363 | retval = ext2fs_block_iterate3(ctx->fs, j_inode->i_ino, |
efc6f628 | 364 | BLOCK_FLAG_HOLE, 0, |
051afbe0 | 365 | process_journal_block, &pb); |
931b58e1 | 366 | if ((pb.last_block + 1) * ctx->fs->blocksize < |
68477355 | 367 | (int) EXT2_I_SIZE(&j_inode->i_ext2)) { |
051afbe0 TT |
368 | retval = EXT2_ET_JOURNAL_TOO_SMALL; |
369 | goto try_backup_journal; | |
d1a2182a | 370 | } |
ded28ac2 KS |
371 | if (tried_backup_jnl && !(ctx->options & E2F_OPT_READONLY)) { |
372 | retval = ext2fs_write_inode(ctx->fs, sb->s_journal_inum, | |
373 | &j_inode->i_ext2); | |
374 | if (retval) | |
375 | goto errout; | |
376 | } | |
377 | ||
931b58e1 AD |
378 | journal->j_maxlen = EXT2_I_SIZE(&j_inode->i_ext2) / |
379 | journal->j_blocksize; | |
3b5386dc | 380 | |
d1a2182a | 381 | #ifdef USE_INODE_IO |
a435ec34 TT |
382 | retval = ext2fs_inode_io_intern2(ctx->fs, sb->s_journal_inum, |
383 | &j_inode->i_ext2, | |
384 | &journal_name); | |
d1a2182a TT |
385 | if (retval) |
386 | goto errout; | |
3b5386dc | 387 | |
d1a2182a TT |
388 | io_ptr = inode_io_manager; |
389 | #else | |
390 | journal->j_inode = j_inode; | |
391 | ctx->journal_io = ctx->fs->io; | |
974d57d3 | 392 | if ((retval = (errcode_t) journal_bmap(journal, 0, &start)) != 0) |
d1a2182a TT |
393 | goto errout; |
394 | #endif | |
395 | } else { | |
396 | ext_journal = 1; | |
f364093b TT |
397 | if (!ctx->journal_name) { |
398 | char uuid[37]; | |
399 | ||
400 | uuid_unparse(sb->s_journal_uuid, uuid); | |
401 | ctx->journal_name = blkid_get_devname(ctx->blkid, | |
402 | "UUID", uuid); | |
403 | if (!ctx->journal_name) | |
404 | ctx->journal_name = blkid_devno_to_devname(sb->s_journal_dev); | |
d1a2182a | 405 | } |
f364093b | 406 | journal_name = ctx->journal_name; |
2bfe0bdb | 407 | |
d1a2182a TT |
408 | if (!journal_name) { |
409 | fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx); | |
2bfe0bdb BB |
410 | retval = EXT2_ET_LOAD_EXT_JOURNAL; |
411 | goto errout; | |
d1a2182a | 412 | } |
2bfe0bdb | 413 | |
d1a2182a TT |
414 | jfs_debug(1, "Using journal file %s\n", journal_name); |
415 | io_ptr = unix_io_manager; | |
3b5386dc TT |
416 | } |
417 | ||
d1a2182a TT |
418 | #if 0 |
419 | test_io_backing_manager = io_ptr; | |
adee8d75 | 420 | io_ptr = test_io_manager; |
adee8d75 | 421 | #endif |
d1a2182a TT |
422 | #ifndef USE_INODE_IO |
423 | if (ext_journal) | |
424 | #endif | |
26991d02 TT |
425 | { |
426 | int flags = IO_FLAG_RW; | |
427 | if (!(ctx->mount_flags & EXT2_MF_ISROOT && | |
428 | ctx->mount_flags & EXT2_MF_READONLY)) | |
429 | flags |= IO_FLAG_EXCLUSIVE; | |
430 | if ((ctx->mount_flags & EXT2_MF_READONLY) && | |
431 | (ctx->options & E2F_OPT_FORCE)) | |
432 | flags &= ~IO_FLAG_EXCLUSIVE; | |
433 | ||
434 | ||
435 | retval = io_ptr->open(journal_name, flags, | |
d1a2182a | 436 | &ctx->journal_io); |
26991d02 | 437 | } |
6d222f32 | 438 | if (retval) |
d1a2182a | 439 | goto errout; |
adee8d75 | 440 | |
d1a2182a TT |
441 | io_channel_set_blksize(ctx->journal_io, ctx->fs->blocksize); |
442 | ||
443 | if (ext_journal) { | |
27dc24de TT |
444 | blk64_t maxlen; |
445 | ||
7f33024a | 446 | start = ext2fs_journal_sb_start(ctx->fs->blocksize) - 1; |
d1a2182a TT |
447 | bh = getblk(dev_journal, start, ctx->fs->blocksize); |
448 | if (!bh) { | |
449 | retval = EXT2_ET_NO_MEMORY; | |
450 | goto errout; | |
451 | } | |
452 | ll_rw_block(READ, 1, &bh); | |
2aa362f5 TT |
453 | if ((retval = bh->b_err) != 0) { |
454 | brelse(bh); | |
d1a2182a | 455 | goto errout; |
2aa362f5 | 456 | } |
7f33024a | 457 | memcpy(&jsuper, start ? bh->b_data : bh->b_data + SUPERBLOCK_OFFSET, |
d1a2182a TT |
458 | sizeof(jsuper)); |
459 | brelse(bh); | |
2eae0930 | 460 | #ifdef WORDS_BIGENDIAN |
efc6f628 | 461 | if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC)) |
d1a2182a | 462 | ext2fs_swap_super(&jsuper); |
adee8d75 | 463 | #endif |
d1a2182a TT |
464 | if (jsuper.s_magic != EXT2_SUPER_MAGIC || |
465 | !(jsuper.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { | |
466 | fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx); | |
467 | retval = EXT2_ET_LOAD_EXT_JOURNAL; | |
468 | goto errout; | |
469 | } | |
470 | /* Make sure the journal UUID is correct */ | |
471 | if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid, | |
472 | sizeof(jsuper.s_uuid))) { | |
473 | fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx); | |
474 | retval = EXT2_ET_LOAD_EXT_JOURNAL; | |
475 | goto errout; | |
476 | } | |
2bfe0bdb | 477 | |
4dbfd79d | 478 | maxlen = ext2fs_blocks_count(&jsuper); |
27dc24de | 479 | journal->j_maxlen = (maxlen < 1ULL << 32) ? maxlen : (1ULL << 32) - 1; |
d1a2182a | 480 | start++; |
3b5386dc TT |
481 | } |
482 | ||
d1a2182a | 483 | if (!(bh = getblk(dev_journal, start, journal->j_blocksize))) { |
adee8d75 TT |
484 | retval = EXT2_ET_NO_MEMORY; |
485 | goto errout; | |
486 | } | |
2bfe0bdb | 487 | |
d1a2182a TT |
488 | journal->j_sb_buffer = bh; |
489 | journal->j_superblock = (journal_superblock_t *)bh->b_data; | |
2bfe0bdb | 490 | |
d1a2182a TT |
491 | #ifdef USE_INODE_IO |
492 | if (j_inode) | |
c4e3d3f3 | 493 | ext2fs_free_mem(&j_inode); |
d1a2182a TT |
494 | #endif |
495 | ||
496 | *ret_journal = journal; | |
051afbe0 | 497 | e2fsck_use_inode_shortcuts(ctx, 0); |
adee8d75 TT |
498 | return 0; |
499 | ||
500 | errout: | |
051afbe0 | 501 | e2fsck_use_inode_shortcuts(ctx, 0); |
d1a2182a | 502 | if (dev_fs) |
c4e3d3f3 | 503 | ext2fs_free_mem(&dev_fs); |
d1a2182a | 504 | if (j_inode) |
c4e3d3f3 | 505 | ext2fs_free_mem(&j_inode); |
d1a2182a | 506 | if (journal) |
c4e3d3f3 | 507 | ext2fs_free_mem(&journal); |
adee8d75 | 508 | return retval; |
3b5386dc TT |
509 | } |
510 | ||
6a6d3d44 TT |
511 | static errcode_t e2fsck_journal_fix_bad_inode(e2fsck_t ctx, |
512 | struct problem_context *pctx) | |
3b5386dc | 513 | { |
5dd8f963 TT |
514 | struct ext2_super_block *sb = ctx->fs->super; |
515 | int recover = ctx->fs->super->s_feature_incompat & | |
516 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
517 | int has_journal = ctx->fs->super->s_feature_compat & | |
518 | EXT3_FEATURE_COMPAT_HAS_JOURNAL; | |
3b5386dc | 519 | |
5dd8f963 | 520 | if (has_journal || sb->s_journal_inum) { |
3b5386dc | 521 | /* The journal inode is bogus, remove and force full fsck */ |
7e92dfae | 522 | pctx->ino = sb->s_journal_inum; |
3b5386dc | 523 | if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) { |
5dd8f963 | 524 | if (has_journal && sb->s_journal_inum) |
3b5386dc TT |
525 | printf("*** ext3 journal has been deleted - " |
526 | "filesystem is now ext2 only ***\n\n"); | |
5dd8f963 TT |
527 | sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
528 | sb->s_journal_inum = 0; | |
5107d0d1 | 529 | ctx->flags |= E2F_FLAG_JOURNAL_INODE; |
0cfce7f7 | 530 | ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
3b5386dc TT |
531 | e2fsck_clear_recover(ctx, 1); |
532 | return 0; | |
533 | } | |
534 | return EXT2_ET_BAD_INODE_NUM; | |
535 | } else if (recover) { | |
536 | if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) { | |
537 | e2fsck_clear_recover(ctx, 1); | |
538 | return 0; | |
539 | } | |
540 | return EXT2_ET_UNSUPP_FEATURE; | |
541 | } | |
542 | return 0; | |
543 | } | |
544 | ||
62e3e7fe TT |
545 | #define V1_SB_SIZE 0x0024 |
546 | static void clear_v2_journal_fields(journal_t *journal) | |
547 | { | |
8cf93332 | 548 | e2fsck_t ctx = journal->j_dev->k_ctx; |
62e3e7fe TT |
549 | struct problem_context pctx; |
550 | ||
551 | clear_problem_context(&pctx); | |
552 | ||
553 | if (!fix_problem(ctx, PR_0_CLEAR_V2_JOURNAL, &pctx)) | |
554 | return; | |
555 | ||
556 | memset(((char *) journal->j_superblock) + V1_SB_SIZE, 0, | |
557 | ctx->fs->blocksize-V1_SB_SIZE); | |
8cf93332 | 558 | mark_buffer_dirty(journal->j_sb_buffer); |
62e3e7fe TT |
559 | } |
560 | ||
561 | ||
6a6d3d44 | 562 | static errcode_t e2fsck_journal_load(journal_t *journal) |
3b5386dc | 563 | { |
8cf93332 | 564 | e2fsck_t ctx = journal->j_dev->k_ctx; |
3b5386dc TT |
565 | journal_superblock_t *jsb; |
566 | struct buffer_head *jbh = journal->j_sb_buffer; | |
567 | struct problem_context pctx; | |
568 | ||
569 | clear_problem_context(&pctx); | |
570 | ||
0e8a9560 | 571 | ll_rw_block(READ, 1, &jbh); |
3b5386dc | 572 | if (jbh->b_err) { |
45ff69ff | 573 | com_err(ctx->device_name, jbh->b_err, "%s", |
3b5386dc TT |
574 | _("reading journal superblock\n")); |
575 | return jbh->b_err; | |
576 | } | |
577 | ||
578 | jsb = journal->j_superblock; | |
579 | /* If we don't even have JFS_MAGIC, we probably have a wrong inode */ | |
580 | if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER)) | |
581 | return e2fsck_journal_fix_bad_inode(ctx, &pctx); | |
582 | ||
0e8a9560 TT |
583 | switch (ntohl(jsb->s_header.h_blocktype)) { |
584 | case JFS_SUPERBLOCK_V1: | |
585 | journal->j_format_version = 1; | |
62e3e7fe TT |
586 | if (jsb->s_feature_compat || |
587 | jsb->s_feature_incompat || | |
588 | jsb->s_feature_ro_compat || | |
589 | jsb->s_nr_users) | |
590 | clear_v2_journal_fields(journal); | |
0e8a9560 | 591 | break; |
efc6f628 | 592 | |
0e8a9560 TT |
593 | case JFS_SUPERBLOCK_V2: |
594 | journal->j_format_version = 2; | |
b3b3d465 | 595 | if (ntohl(jsb->s_nr_users) > 1 && |
a435ec34 | 596 | uuid_is_null(ctx->fs->super->s_journal_uuid)) |
62e3e7fe | 597 | clear_v2_journal_fields(journal); |
adee8d75 TT |
598 | if (ntohl(jsb->s_nr_users) > 1) { |
599 | fix_problem(ctx, PR_0_JOURNAL_UNSUPP_MULTIFS, &pctx); | |
600 | return EXT2_ET_JOURNAL_UNSUPP_VERSION; | |
601 | } | |
0e8a9560 | 602 | break; |
c7f23364 TT |
603 | |
604 | /* | |
605 | * These should never appear in a journal super block, so if | |
606 | * they do, the journal is badly corrupted. | |
607 | */ | |
608 | case JFS_DESCRIPTOR_BLOCK: | |
609 | case JFS_COMMIT_BLOCK: | |
610 | case JFS_REVOKE_BLOCK: | |
611 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
efc6f628 | 612 | |
0e8a9560 TT |
613 | /* If we don't understand the superblock major type, but there |
614 | * is a magic number, then it is likely to be a new format we | |
615 | * just don't understand, so leave it alone. */ | |
616 | default: | |
c7f23364 | 617 | return EXT2_ET_JOURNAL_UNSUPP_VERSION; |
0e8a9560 TT |
618 | } |
619 | ||
2f686ace TT |
620 | if (JFS_HAS_INCOMPAT_FEATURE(journal, ~JFS_KNOWN_INCOMPAT_FEATURES)) |
621 | return EXT2_ET_UNSUPP_FEATURE; | |
efc6f628 | 622 | |
2f686ace TT |
623 | if (JFS_HAS_RO_COMPAT_FEATURE(journal, ~JFS_KNOWN_ROCOMPAT_FEATURES)) |
624 | return EXT2_ET_RO_UNSUPP_FEATURE; | |
3b5386dc | 625 | |
b2795949 DW |
626 | /* Checksum v1 and v2 are mutually exclusive features. */ |
627 | if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_CSUM_V2) && | |
628 | JFS_HAS_COMPAT_FEATURE(journal, JFS_FEATURE_COMPAT_CHECKSUM)) | |
629 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
630 | ||
631 | if (!e2fsck_journal_verify_csum_type(journal, jsb) || | |
632 | !e2fsck_journal_sb_csum_verify(journal, jsb)) | |
633 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
634 | ||
13af4b93 DW |
635 | if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_CSUM_V2)) |
636 | journal->j_csum_seed = jbd2_chksum(journal, ~0, jsb->s_uuid, | |
637 | sizeof(jsb->s_uuid)); | |
638 | ||
0e8a9560 TT |
639 | /* We have now checked whether we know enough about the journal |
640 | * format to be able to proceed safely, so any other checks that | |
641 | * fail we should attempt to recover from. */ | |
642 | if (jsb->s_blocksize != htonl(journal->j_blocksize)) { | |
643 | com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, | |
644 | _("%s: no valid journal superblock found\n"), | |
645 | ctx->device_name); | |
646 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
3b5386dc TT |
647 | } |
648 | ||
649 | if (ntohl(jsb->s_maxlen) < journal->j_maxlen) | |
650 | journal->j_maxlen = ntohl(jsb->s_maxlen); | |
651 | else if (ntohl(jsb->s_maxlen) > journal->j_maxlen) { | |
0e8a9560 TT |
652 | com_err(ctx->program_name, EXT2_ET_CORRUPT_SUPERBLOCK, |
653 | _("%s: journal too short\n"), | |
654 | ctx->device_name); | |
3b5386dc TT |
655 | return EXT2_ET_CORRUPT_SUPERBLOCK; |
656 | } | |
657 | ||
658 | journal->j_tail_sequence = ntohl(jsb->s_sequence); | |
ecf1b776 | 659 | journal->j_transaction_sequence = journal->j_tail_sequence; |
3b5386dc TT |
660 | journal->j_tail = ntohl(jsb->s_start); |
661 | journal->j_first = ntohl(jsb->s_first); | |
662 | journal->j_last = ntohl(jsb->s_maxlen); | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
53ef44c4 | 667 | static void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb, |
6a6d3d44 | 668 | journal_t *journal) |
3b5386dc | 669 | { |
0e8a9560 | 670 | char *p; |
424cd2be TT |
671 | union { |
672 | uuid_t uuid; | |
673 | __u32 val[4]; | |
674 | } u; | |
675 | __u32 new_seq = 0; | |
676 | int i; | |
677 | ||
0e8a9560 TT |
678 | /* Leave a valid existing V1 superblock signature alone. |
679 | * Anything unrecognisable we overwrite with a new V2 | |
680 | * signature. */ | |
efc6f628 | 681 | |
0e8a9560 TT |
682 | if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER) || |
683 | jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1)) { | |
684 | jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER); | |
685 | jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2); | |
686 | } | |
687 | ||
688 | /* Zero out everything else beyond the superblock header */ | |
efc6f628 | 689 | |
0e8a9560 TT |
690 | p = ((char *) jsb) + sizeof(journal_header_t); |
691 | memset (p, 0, ctx->fs->blocksize-sizeof(journal_header_t)); | |
692 | ||
3b5386dc | 693 | jsb->s_blocksize = htonl(ctx->fs->blocksize); |
0e8a9560 TT |
694 | jsb->s_maxlen = htonl(journal->j_maxlen); |
695 | jsb->s_first = htonl(1); | |
0e8a9560 | 696 | |
424cd2be TT |
697 | /* Initialize the journal sequence number so that there is "no" |
698 | * chance we will find old "valid" transactions in the journal. | |
699 | * This avoids the need to zero the whole journal (slow to do, | |
700 | * and risky when we are just recovering the filesystem). | |
701 | */ | |
702 | uuid_generate(u.uuid); | |
703 | for (i = 0; i < 4; i ++) | |
704 | new_seq ^= u.val[i]; | |
705 | jsb->s_sequence = htonl(new_seq); | |
b2795949 | 706 | e2fsck_journal_sb_csum_set(journal, jsb); |
0e8a9560 | 707 | |
8cf93332 | 708 | mark_buffer_dirty(journal->j_sb_buffer); |
0e8a9560 | 709 | ll_rw_block(WRITE, 1, &journal->j_sb_buffer); |
3b5386dc TT |
710 | } |
711 | ||
6a6d3d44 TT |
712 | static errcode_t e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, |
713 | journal_t *journal, | |
714 | struct problem_context *pctx) | |
3b5386dc | 715 | { |
5dd8f963 TT |
716 | struct ext2_super_block *sb = ctx->fs->super; |
717 | int recover = ctx->fs->super->s_feature_incompat & | |
718 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc | 719 | |
5dd8f963 | 720 | if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) { |
3b5386dc | 721 | if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) { |
b2f93192 TT |
722 | e2fsck_journal_reset_super(ctx, journal->j_superblock, |
723 | journal); | |
3b5386dc TT |
724 | journal->j_transaction_sequence = 1; |
725 | e2fsck_clear_recover(ctx, recover); | |
726 | return 0; | |
727 | } | |
728 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
729 | } else if (e2fsck_journal_fix_bad_inode(ctx, pctx)) | |
730 | return EXT2_ET_CORRUPT_SUPERBLOCK; | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
6a6d3d44 TT |
735 | static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, |
736 | int reset, int drop) | |
3b5386dc TT |
737 | { |
738 | journal_superblock_t *jsb; | |
739 | ||
6a6d3d44 TT |
740 | if (drop) |
741 | mark_buffer_clean(journal->j_sb_buffer); | |
742 | else if (!(ctx->options & E2F_OPT_READONLY)) { | |
3b5386dc TT |
743 | jsb = journal->j_superblock; |
744 | jsb->s_sequence = htonl(journal->j_transaction_sequence); | |
745 | if (reset) | |
746 | jsb->s_start = 0; /* this marks the journal as empty */ | |
b2795949 | 747 | e2fsck_journal_sb_csum_set(journal, jsb); |
8cf93332 | 748 | mark_buffer_dirty(journal->j_sb_buffer); |
3b5386dc TT |
749 | } |
750 | brelse(journal->j_sb_buffer); | |
751 | ||
6d222f32 TT |
752 | if (ctx->journal_io) { |
753 | if (ctx->fs && ctx->fs->io != ctx->journal_io) | |
754 | io_channel_close(ctx->journal_io); | |
755 | ctx->journal_io = 0; | |
756 | } | |
efc6f628 | 757 | |
d1a2182a | 758 | #ifndef USE_INODE_IO |
3b5386dc | 759 | if (journal->j_inode) |
c4e3d3f3 | 760 | ext2fs_free_mem(&journal->j_inode); |
d1a2182a TT |
761 | #endif |
762 | if (journal->j_fs_dev) | |
c4e3d3f3 TT |
763 | ext2fs_free_mem(&journal->j_fs_dev); |
764 | ext2fs_free_mem(&journal); | |
3b5386dc TT |
765 | } |
766 | ||
9b565759 TT |
767 | /* |
768 | * This function makes sure that the superblock fields regarding the | |
769 | * journal are consistent. | |
770 | */ | |
974d57d3 | 771 | errcode_t e2fsck_check_ext3_journal(e2fsck_t ctx) |
3b5386dc | 772 | { |
5dd8f963 | 773 | struct ext2_super_block *sb = ctx->fs->super; |
3b5386dc | 774 | journal_t *journal; |
5dd8f963 TT |
775 | int recover = ctx->fs->super->s_feature_incompat & |
776 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc | 777 | struct problem_context pctx; |
d37066a9 | 778 | problem_t problem; |
d3f35b64 | 779 | int reset = 0, force_fsck = 0; |
974d57d3 | 780 | errcode_t retval; |
3b5386dc TT |
781 | |
782 | /* If we don't have any journal features, don't do anything more */ | |
5dd8f963 TT |
783 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && |
784 | !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 && | |
785 | uuid_is_null(sb->s_journal_uuid)) | |
9b565759 | 786 | return 0; |
3b5386dc TT |
787 | |
788 | clear_problem_context(&pctx); | |
5dd8f963 | 789 | pctx.num = sb->s_journal_inum; |
3b5386dc TT |
790 | |
791 | retval = e2fsck_get_journal(ctx, &journal); | |
792 | if (retval) { | |
f2d5c937 | 793 | if ((retval == EXT2_ET_BAD_INODE_NUM) || |
6e4fbbeb | 794 | (retval == EXT2_ET_BAD_BLOCK_NUM) || |
f2d5c937 TT |
795 | (retval == EXT2_ET_JOURNAL_TOO_SMALL) || |
796 | (retval == EXT2_ET_NO_JOURNAL)) | |
3b5386dc TT |
797 | return e2fsck_journal_fix_bad_inode(ctx, &pctx); |
798 | return retval; | |
799 | } | |
800 | ||
801 | retval = e2fsck_journal_load(journal); | |
802 | if (retval) { | |
c7f23364 | 803 | if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) || |
2f686ace TT |
804 | ((retval == EXT2_ET_UNSUPP_FEATURE) && |
805 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT, | |
806 | &pctx))) || | |
807 | ((retval == EXT2_ET_RO_UNSUPP_FEATURE) && | |
808 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT, | |
809 | &pctx))) || | |
c7f23364 TT |
810 | ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) && |
811 | (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx)))) | |
6a6d3d44 TT |
812 | retval = e2fsck_journal_fix_corrupt_super(ctx, journal, |
813 | &pctx); | |
814 | e2fsck_journal_release(ctx, journal, 0, 1); | |
3b5386dc TT |
815 | return retval; |
816 | } | |
817 | ||
818 | /* | |
819 | * We want to make the flags consistent here. We will not leave with | |
820 | * needs_recovery set but has_journal clear. We can't get in a loop | |
821 | * with -y, -n, or -p, only if a user isn't making up their mind. | |
822 | */ | |
823 | no_has_journal: | |
5dd8f963 TT |
824 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) { |
825 | recover = sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER; | |
3b5386dc TT |
826 | if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) { |
827 | if (recover && | |
828 | !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx)) | |
829 | goto no_has_journal; | |
d3f35b64 TT |
830 | /* |
831 | * Need a full fsck if we are releasing a | |
8c2dc521 | 832 | * journal stored on a reserved inode. |
d3f35b64 TT |
833 | */ |
834 | force_fsck = recover || | |
835 | (sb->s_journal_inum < EXT2_FIRST_INODE(sb)); | |
836 | /* Clear all of the journal fields */ | |
5dd8f963 | 837 | sb->s_journal_inum = 0; |
d3f35b64 TT |
838 | sb->s_journal_dev = 0; |
839 | memset(sb->s_journal_uuid, 0, | |
840 | sizeof(sb->s_journal_uuid)); | |
841 | e2fsck_clear_recover(ctx, force_fsck); | |
3b5386dc | 842 | } else if (!(ctx->options & E2F_OPT_READONLY)) { |
5dd8f963 | 843 | sb->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
0cfce7f7 | 844 | ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
3b5386dc TT |
845 | ext2fs_mark_super_dirty(ctx->fs); |
846 | } | |
847 | } | |
848 | ||
5dd8f963 TT |
849 | if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL && |
850 | !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) && | |
3b5386dc | 851 | journal->j_superblock->s_start != 0) { |
d37066a9 TT |
852 | /* Print status information */ |
853 | fix_problem(ctx, PR_0_JOURNAL_RECOVERY_CLEAR, &pctx); | |
854 | if (ctx->superblock) | |
855 | problem = PR_0_JOURNAL_RUN_DEFAULT; | |
856 | else | |
857 | problem = PR_0_JOURNAL_RUN; | |
858 | if (fix_problem(ctx, problem, &pctx)) { | |
859 | ctx->options |= E2F_OPT_FORCE; | |
860 | sb->s_feature_incompat |= | |
861 | EXT3_FEATURE_INCOMPAT_RECOVER; | |
862 | ext2fs_mark_super_dirty(ctx->fs); | |
863 | } else if (fix_problem(ctx, | |
864 | PR_0_JOURNAL_RESET_JOURNAL, &pctx)) { | |
3b5386dc | 865 | reset = 1; |
d3f35b64 TT |
866 | sb->s_state &= ~EXT2_VALID_FS; |
867 | ext2fs_mark_super_dirty(ctx->fs); | |
868 | } | |
869 | /* | |
870 | * If the user answers no to the above question, we | |
871 | * ignore the fact that journal apparently has data; | |
872 | * accidentally replaying over valid data would be far | |
873 | * worse than skipping a questionable recovery. | |
efc6f628 | 874 | * |
d3f35b64 TT |
875 | * XXX should we abort with a fatal error here? What |
876 | * will the ext3 kernel code do if a filesystem with | |
877 | * !NEEDS_RECOVERY but with a non-zero | |
878 | * journal->j_superblock->s_start is mounted? | |
879 | */ | |
3b5386dc TT |
880 | } |
881 | ||
6d75685e TT |
882 | /* |
883 | * If we don't need to do replay the journal, check to see if | |
884 | * the journal's errno is set; if so, we need to mark the file | |
885 | * system as being corrupt and clear the journal's s_errno. | |
886 | */ | |
887 | if (!(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) && | |
888 | journal->j_superblock->s_errno) { | |
889 | ctx->fs->super->s_state |= EXT2_ERROR_FS; | |
890 | ext2fs_mark_super_dirty(ctx->fs); | |
891 | journal->j_superblock->s_errno = 0; | |
b2795949 | 892 | e2fsck_journal_sb_csum_set(journal, journal->j_superblock); |
6d75685e TT |
893 | mark_buffer_dirty(journal->j_sb_buffer); |
894 | } | |
895 | ||
6a6d3d44 | 896 | e2fsck_journal_release(ctx, journal, reset, 0); |
3b5386dc TT |
897 | return retval; |
898 | } | |
899 | ||
6a6d3d44 | 900 | static errcode_t recover_ext3_journal(e2fsck_t ctx) |
3b5386dc | 901 | { |
185c4aea | 902 | struct problem_context pctx; |
3b5386dc | 903 | journal_t *journal; |
974d57d3 | 904 | errcode_t retval; |
3b5386dc | 905 | |
185c4aea TT |
906 | clear_problem_context(&pctx); |
907 | ||
8cf93332 | 908 | journal_init_revoke_caches(); |
3b5386dc TT |
909 | retval = e2fsck_get_journal(ctx, &journal); |
910 | if (retval) | |
ecf1b776 TT |
911 | return retval; |
912 | ||
3b5386dc TT |
913 | retval = e2fsck_journal_load(journal); |
914 | if (retval) | |
6a6d3d44 | 915 | goto errout; |
3b5386dc | 916 | |
0e8a9560 TT |
917 | retval = journal_init_revoke(journal, 1024); |
918 | if (retval) | |
6a6d3d44 | 919 | goto errout; |
efc6f628 | 920 | |
3b5386dc | 921 | retval = -journal_recover(journal); |
c0a083fa TT |
922 | if (retval) |
923 | goto errout; | |
efc6f628 | 924 | |
185c4aea TT |
925 | if (journal->j_failed_commit) { |
926 | pctx.ino = journal->j_failed_commit; | |
927 | fix_problem(ctx, PR_0_JNL_TXN_CORRUPT, &pctx); | |
63b3913d | 928 | journal->j_superblock->s_errno = -EINVAL; |
8cf93332 | 929 | mark_buffer_dirty(journal->j_sb_buffer); |
c0a083fa | 930 | } |
efc6f628 | 931 | |
6a6d3d44 | 932 | errout: |
d1a2182a | 933 | journal_destroy_revoke(journal); |
8cf93332 | 934 | journal_destroy_revoke_caches(); |
6a6d3d44 | 935 | e2fsck_journal_release(ctx, journal, 1, 0); |
3b5386dc TT |
936 | return retval; |
937 | } | |
938 | ||
974d57d3 | 939 | errcode_t e2fsck_run_ext3_journal(e2fsck_t ctx) |
80bfaa3e TT |
940 | { |
941 | io_manager io_ptr = ctx->fs->io->manager; | |
942 | int blocksize = ctx->fs->blocksize; | |
ecf1b776 | 943 | errcode_t retval, recover_retval; |
27a407df TT |
944 | io_stats stats = 0; |
945 | unsigned long long kbytes_written = 0; | |
8394902e TT |
946 | |
947 | printf(_("%s: recovering journal\n"), ctx->device_name); | |
ecf1b776 | 948 | if (ctx->options & E2F_OPT_READONLY) { |
8394902e | 949 | printf(_("%s: won't do journal recovery while read-only\n"), |
ecf1b776 TT |
950 | ctx->device_name); |
951 | return EXT2_ET_FILE_RO; | |
952 | } | |
953 | ||
0f2cfe25 | 954 | if (ctx->fs->flags & EXT2_FLAG_DIRTY) |
3c6b8977 | 955 | ext2fs_flush(ctx->fs); /* Force out any modifications */ |
d0515212 | 956 | |
ecf1b776 | 957 | recover_retval = recover_ext3_journal(ctx); |
efc6f628 | 958 | |
80bfaa3e TT |
959 | /* |
960 | * Reload the filesystem context to get up-to-date data from disk | |
961 | * because journal recovery will change the filesystem under us. | |
962 | */ | |
27a407df TT |
963 | if (ctx->fs->super->s_kbytes_written && |
964 | ctx->fs->io->manager->get_stats) | |
965 | ctx->fs->io->manager->get_stats(ctx->fs->io, &stats); | |
966 | if (stats && stats->bytes_written) | |
967 | kbytes_written = stats->bytes_written >> 10; | |
0f5eba75 AD |
968 | |
969 | ext2fs_mmp_stop(ctx->fs); | |
27a407df | 970 | ext2fs_free(ctx->fs); |
0d19ccbd | 971 | retval = ext2fs_open(ctx->filesystem_name, ctx->openfs_flags, |
80bfaa3e TT |
972 | ctx->superblock, blocksize, io_ptr, |
973 | &ctx->fs); | |
80bfaa3e TT |
974 | if (retval) { |
975 | com_err(ctx->program_name, retval, | |
976 | _("while trying to re-open %s"), | |
977 | ctx->device_name); | |
99a2cc96 | 978 | fatal_error(ctx, 0); |
80bfaa3e TT |
979 | } |
980 | ctx->fs->priv_data = ctx; | |
8dceb924 | 981 | ctx->fs->now = ctx->now; |
058ad1c7 | 982 | ctx->fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
27a407df | 983 | ctx->fs->super->s_kbytes_written += kbytes_written; |
17390c04 | 984 | |
ecf1b776 | 985 | /* Set the superblock flags */ |
974d57d3 | 986 | e2fsck_clear_recover(ctx, recover_retval != 0); |
63b3913d TT |
987 | |
988 | /* | |
989 | * Do one last sanity check, and propagate journal->s_errno to | |
990 | * the EXT2_ERROR_FS flag in the fs superblock if needed. | |
991 | */ | |
992 | retval = e2fsck_check_ext3_journal(ctx); | |
993 | return retval ? retval : recover_retval; | |
17390c04 | 994 | } |
773fd8a1 TT |
995 | |
996 | /* | |
997 | * This function will move the journal inode from a visible file in | |
998 | * the filesystem directory hierarchy to the reserved inode if necessary. | |
999 | */ | |
546a1ff1 | 1000 | static const char * const journal_names[] = { |
773fd8a1 TT |
1001 | ".journal", "journal", ".journal.dat", "journal.dat", 0 }; |
1002 | ||
1003 | void e2fsck_move_ext3_journal(e2fsck_t ctx) | |
1004 | { | |
1005 | struct ext2_super_block *sb = ctx->fs->super; | |
1006 | struct problem_context pctx; | |
1007 | struct ext2_inode inode; | |
1008 | ext2_filsys fs = ctx->fs; | |
1009 | ext2_ino_t ino; | |
1010 | errcode_t retval; | |
1011 | const char * const * cpp; | |
3971bfe8 TT |
1012 | dgrp_t group; |
1013 | int mount_flags; | |
efc6f628 | 1014 | |
a435ec34 TT |
1015 | clear_problem_context(&pctx); |
1016 | ||
773fd8a1 TT |
1017 | /* |
1018 | * If the filesystem is opened read-only, or there is no | |
a435ec34 | 1019 | * journal, then do nothing. |
773fd8a1 TT |
1020 | */ |
1021 | if ((ctx->options & E2F_OPT_READONLY) || | |
1022 | (sb->s_journal_inum == 0) || | |
773fd8a1 TT |
1023 | !(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) |
1024 | return; | |
1025 | ||
a435ec34 TT |
1026 | /* |
1027 | * Read in the journal inode | |
1028 | */ | |
1029 | if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0) | |
1030 | return; | |
1031 | ||
1032 | /* | |
1033 | * If it's necessary to backup the journal inode, do so. | |
1034 | */ | |
1035 | if ((sb->s_jnl_backup_type == 0) || | |
1036 | ((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) && | |
1037 | memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) { | |
1038 | if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) { | |
1039 | memcpy(sb->s_jnl_blocks, inode.i_block, | |
1040 | EXT2_N_BLOCKS*4); | |
931b58e1 | 1041 | sb->s_jnl_blocks[15] = inode.i_size_high; |
a435ec34 TT |
1042 | sb->s_jnl_blocks[16] = inode.i_size; |
1043 | sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; | |
1044 | ext2fs_mark_super_dirty(fs); | |
27479eb2 | 1045 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
a435ec34 TT |
1046 | } |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * If the journal is already the hidden inode, then do nothing | |
1051 | */ | |
1052 | if (sb->s_journal_inum == EXT2_JOURNAL_INO) | |
1053 | return; | |
efc6f628 | 1054 | |
a435ec34 TT |
1055 | /* |
1056 | * The journal inode had better have only one link and not be readable. | |
1057 | */ | |
1058 | if (inode.i_links_count != 1) | |
1059 | return; | |
1060 | ||
773fd8a1 TT |
1061 | /* |
1062 | * If the filesystem is mounted, or we can't tell whether | |
1063 | * or not it's mounted, do nothing. | |
1064 | */ | |
1065 | retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); | |
1066 | if (retval || (mount_flags & EXT2_MF_MOUNTED)) | |
1067 | return; | |
1068 | ||
1069 | /* | |
1070 | * If we can't find the name of the journal inode, then do | |
1071 | * nothing. | |
1072 | */ | |
1073 | for (cpp = journal_names; *cpp; cpp++) { | |
1074 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp, | |
1075 | strlen(*cpp), 0, &ino); | |
1076 | if ((retval == 0) && (ino == sb->s_journal_inum)) | |
1077 | break; | |
1078 | } | |
1079 | if (*cpp == 0) | |
1080 | return; | |
1081 | ||
773fd8a1 TT |
1082 | /* We need the inode bitmap to be loaded */ |
1083 | retval = ext2fs_read_bitmaps(fs); | |
1084 | if (retval) | |
1085 | return; | |
1086 | ||
773fd8a1 TT |
1087 | pctx.str = *cpp; |
1088 | if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx)) | |
1089 | return; | |
efc6f628 | 1090 | |
773fd8a1 TT |
1091 | /* |
1092 | * OK, we've done all the checks, let's actually move the | |
1093 | * journal inode. Errors at this point mean we need to force | |
1094 | * an ext2 filesystem check. | |
1095 | */ | |
1096 | if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0) | |
1097 | goto err_out; | |
1098 | if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0) | |
1099 | goto err_out; | |
1100 | sb->s_journal_inum = EXT2_JOURNAL_INO; | |
1101 | ext2fs_mark_super_dirty(fs); | |
27479eb2 | 1102 | fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
773fd8a1 | 1103 | inode.i_links_count = 0; |
1f3ad14a | 1104 | inode.i_dtime = ctx->now; |
773fd8a1 TT |
1105 | if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0) |
1106 | goto err_out; | |
1107 | ||
1108 | group = ext2fs_group_of_ino(fs, ino); | |
c5d2f50d | 1109 | ext2fs_unmark_inode_bitmap2(fs->inode_map, ino); |
773fd8a1 | 1110 | ext2fs_mark_ib_dirty(fs); |
d7cca6b0 | 1111 | ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) + 1); |
49a7360b | 1112 | ext2fs_group_desc_csum_set(fs, group); |
773fd8a1 TT |
1113 | fs->super->s_free_inodes_count++; |
1114 | return; | |
1115 | ||
1116 | err_out: | |
1117 | pctx.errcode = retval; | |
1118 | fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx); | |
1119 | fs->super->s_state &= ~EXT2_VALID_FS; | |
1120 | ext2fs_mark_super_dirty(fs); | |
1121 | return; | |
1122 | } | |
1123 | ||
b1c52b26 TT |
1124 | /* |
1125 | * This function makes sure the superblock hint for the external | |
1126 | * journal is correct. | |
1127 | */ | |
1128 | int e2fsck_fix_ext3_journal_hint(e2fsck_t ctx) | |
1129 | { | |
1130 | struct ext2_super_block *sb = ctx->fs->super; | |
1131 | struct problem_context pctx; | |
1132 | char uuid[37], *journal_name; | |
1133 | struct stat st; | |
b1c52b26 TT |
1134 | |
1135 | if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) || | |
1136 | uuid_is_null(sb->s_journal_uuid)) | |
1137 | return 0; | |
1138 | ||
1139 | uuid_unparse(sb->s_journal_uuid, uuid); | |
1140 | journal_name = blkid_get_devname(ctx->blkid, "UUID", uuid); | |
1141 | if (!journal_name) | |
1142 | return 0; | |
1143 | ||
f0131bdc DW |
1144 | if (stat(journal_name, &st) < 0) { |
1145 | free(journal_name); | |
b1c52b26 | 1146 | return 0; |
f0131bdc | 1147 | } |
b1c52b26 TT |
1148 | |
1149 | if (st.st_rdev != sb->s_journal_dev) { | |
1150 | clear_problem_context(&pctx); | |
1151 | pctx.num = st.st_rdev; | |
1152 | if (fix_problem(ctx, PR_0_EXTERNAL_JOURNAL_HINT, &pctx)) { | |
1153 | sb->s_journal_dev = st.st_rdev; | |
1154 | ext2fs_mark_super_dirty(ctx->fs); | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | free(journal_name); | |
1159 | return 0; | |
1160 | } |