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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | ** Write ahead logging implementation copyright Chris Mason 2000 | |
3 | ** | |
25985edc | 4 | ** The background commits make this code very interrelated, and |
1da177e4 LT |
5 | ** overly complex. I need to rethink things a bit....The major players: |
6 | ** | |
0222e657 | 7 | ** journal_begin -- call with the number of blocks you expect to log. |
1da177e4 | 8 | ** If the current transaction is too |
0222e657 | 9 | ** old, it will block until the current transaction is |
1da177e4 | 10 | ** finished, and then start a new one. |
0222e657 | 11 | ** Usually, your transaction will get joined in with |
1da177e4 LT |
12 | ** previous ones for speed. |
13 | ** | |
0222e657 | 14 | ** journal_join -- same as journal_begin, but won't block on the current |
1da177e4 | 15 | ** transaction regardless of age. Don't ever call |
0222e657 | 16 | ** this. Ever. There are only two places it should be |
1da177e4 LT |
17 | ** called from, and they are both inside this file. |
18 | ** | |
0222e657 | 19 | ** journal_mark_dirty -- adds blocks into this transaction. clears any flags |
1da177e4 | 20 | ** that might make them get sent to disk |
0222e657 JM |
21 | ** and then marks them BH_JDirty. Puts the buffer head |
22 | ** into the current transaction hash. | |
1da177e4 LT |
23 | ** |
24 | ** journal_end -- if the current transaction is batchable, it does nothing | |
25 | ** otherwise, it could do an async/synchronous commit, or | |
0222e657 | 26 | ** a full flush of all log and real blocks in the |
1da177e4 LT |
27 | ** transaction. |
28 | ** | |
0222e657 JM |
29 | ** flush_old_commits -- if the current transaction is too old, it is ended and |
30 | ** commit blocks are sent to disk. Forces commit blocks | |
31 | ** to disk for all backgrounded commits that have been | |
1da177e4 | 32 | ** around too long. |
0222e657 | 33 | ** -- Note, if you call this as an immediate flush from |
1da177e4 LT |
34 | ** from within kupdate, it will ignore the immediate flag |
35 | */ | |
36 | ||
1da177e4 | 37 | #include <linux/time.h> |
6188e10d | 38 | #include <linux/semaphore.h> |
1da177e4 LT |
39 | #include <linux/vmalloc.h> |
40 | #include <linux/reiserfs_fs.h> | |
1da177e4 LT |
41 | #include <linux/kernel.h> |
42 | #include <linux/errno.h> | |
43 | #include <linux/fcntl.h> | |
44 | #include <linux/stat.h> | |
45 | #include <linux/string.h> | |
1da177e4 LT |
46 | #include <linux/buffer_head.h> |
47 | #include <linux/workqueue.h> | |
48 | #include <linux/writeback.h> | |
49 | #include <linux/blkdev.h> | |
3fcfab16 | 50 | #include <linux/backing-dev.h> |
90415dea | 51 | #include <linux/uaccess.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
90415dea JM |
53 | |
54 | #include <asm/system.h> | |
1da177e4 | 55 | |
1da177e4 LT |
56 | /* gets a struct reiserfs_journal_list * from a list head */ |
57 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
58 | j_list)) | |
59 | #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
60 | j_working_list)) | |
61 | ||
62 | /* the number of mounted filesystems. This is used to decide when to | |
63 | ** start and kill the commit workqueue | |
64 | */ | |
65 | static int reiserfs_mounted_fs_count; | |
66 | ||
67 | static struct workqueue_struct *commit_wq; | |
68 | ||
bd4c625c LT |
69 | #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit |
70 | structs at 4k */ | |
71 | #define BUFNR 64 /*read ahead */ | |
1da177e4 LT |
72 | |
73 | /* cnode stat bits. Move these into reiserfs_fs.h */ | |
74 | ||
75 | #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ | |
bd4c625c | 76 | #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ |
1da177e4 LT |
77 | |
78 | #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ | |
79 | #define BLOCK_DIRTIED 5 | |
80 | ||
1da177e4 LT |
81 | /* journal list state bits */ |
82 | #define LIST_TOUCHED 1 | |
83 | #define LIST_DIRTY 2 | |
bd4c625c | 84 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ |
1da177e4 LT |
85 | |
86 | /* flags for do_journal_end */ | |
87 | #define FLUSH_ALL 1 /* flush commit and real blocks */ | |
88 | #define COMMIT_NOW 2 /* end and commit this transaction */ | |
bd4c625c LT |
89 | #define WAIT 4 /* wait for the log blocks to hit the disk */ |
90 | ||
91 | static int do_journal_end(struct reiserfs_transaction_handle *, | |
92 | struct super_block *, unsigned long nblocks, | |
93 | int flags); | |
94 | static int flush_journal_list(struct super_block *s, | |
95 | struct reiserfs_journal_list *jl, int flushall); | |
96 | static int flush_commit_list(struct super_block *s, | |
97 | struct reiserfs_journal_list *jl, int flushall); | |
98 | static int can_dirty(struct reiserfs_journal_cnode *cn); | |
99 | static int journal_join(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 100 | struct super_block *sb, unsigned long nblocks); |
bd4c625c LT |
101 | static int release_journal_dev(struct super_block *super, |
102 | struct reiserfs_journal *journal); | |
1da177e4 | 103 | static int dirty_one_transaction(struct super_block *s, |
bd4c625c | 104 | struct reiserfs_journal_list *jl); |
c4028958 | 105 | static void flush_async_commits(struct work_struct *work); |
1da177e4 LT |
106 | static void queue_log_writer(struct super_block *s); |
107 | ||
108 | /* values for join in do_journal_begin_r */ | |
109 | enum { | |
bd4c625c LT |
110 | JBEGIN_REG = 0, /* regular journal begin */ |
111 | JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ | |
112 | JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ | |
1da177e4 LT |
113 | }; |
114 | ||
115 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 116 | struct super_block *sb, |
bd4c625c | 117 | unsigned long nblocks, int join); |
1da177e4 | 118 | |
a9dd3643 | 119 | static void init_journal_hash(struct super_block *sb) |
bd4c625c | 120 | { |
a9dd3643 | 121 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
122 | memset(journal->j_hash_table, 0, |
123 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
1da177e4 LT |
124 | } |
125 | ||
126 | /* | |
127 | ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to | |
128 | ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for | |
129 | ** more details. | |
130 | */ | |
bd4c625c LT |
131 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) |
132 | { | |
133 | if (bh) { | |
134 | clear_buffer_dirty(bh); | |
135 | clear_buffer_journal_test(bh); | |
136 | } | |
137 | return 0; | |
1da177e4 LT |
138 | } |
139 | ||
bd4c625c | 140 | static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block |
a9dd3643 | 141 | *sb) |
bd4c625c LT |
142 | { |
143 | struct reiserfs_bitmap_node *bn; | |
144 | static int id; | |
145 | ||
d739b42b | 146 | bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); |
bd4c625c LT |
147 | if (!bn) { |
148 | return NULL; | |
149 | } | |
a9dd3643 | 150 | bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); |
bd4c625c | 151 | if (!bn->data) { |
d739b42b | 152 | kfree(bn); |
bd4c625c LT |
153 | return NULL; |
154 | } | |
155 | bn->id = id++; | |
bd4c625c LT |
156 | INIT_LIST_HEAD(&bn->list); |
157 | return bn; | |
158 | } | |
159 | ||
a9dd3643 | 160 | static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) |
bd4c625c | 161 | { |
a9dd3643 | 162 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
163 | struct reiserfs_bitmap_node *bn = NULL; |
164 | struct list_head *entry = journal->j_bitmap_nodes.next; | |
165 | ||
166 | journal->j_used_bitmap_nodes++; | |
167 | repeat: | |
168 | ||
169 | if (entry != &journal->j_bitmap_nodes) { | |
170 | bn = list_entry(entry, struct reiserfs_bitmap_node, list); | |
171 | list_del(entry); | |
a9dd3643 | 172 | memset(bn->data, 0, sb->s_blocksize); |
bd4c625c LT |
173 | journal->j_free_bitmap_nodes--; |
174 | return bn; | |
175 | } | |
a9dd3643 | 176 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
177 | if (!bn) { |
178 | yield(); | |
179 | goto repeat; | |
180 | } | |
181 | return bn; | |
1da177e4 | 182 | } |
a9dd3643 | 183 | static inline void free_bitmap_node(struct super_block *sb, |
bd4c625c LT |
184 | struct reiserfs_bitmap_node *bn) |
185 | { | |
a9dd3643 | 186 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
187 | journal->j_used_bitmap_nodes--; |
188 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { | |
d739b42b PE |
189 | kfree(bn->data); |
190 | kfree(bn); | |
bd4c625c LT |
191 | } else { |
192 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
193 | journal->j_free_bitmap_nodes++; | |
194 | } | |
195 | } | |
196 | ||
a9dd3643 | 197 | static void allocate_bitmap_nodes(struct super_block *sb) |
bd4c625c LT |
198 | { |
199 | int i; | |
a9dd3643 | 200 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
201 | struct reiserfs_bitmap_node *bn = NULL; |
202 | for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { | |
a9dd3643 | 203 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
204 | if (bn) { |
205 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
206 | journal->j_free_bitmap_nodes++; | |
207 | } else { | |
0222e657 | 208 | break; /* this is ok, we'll try again when more are needed */ |
bd4c625c LT |
209 | } |
210 | } | |
1da177e4 LT |
211 | } |
212 | ||
a9dd3643 | 213 | static int set_bit_in_list_bitmap(struct super_block *sb, |
3ee16670 | 214 | b_blocknr_t block, |
bd4c625c LT |
215 | struct reiserfs_list_bitmap *jb) |
216 | { | |
a9dd3643 JM |
217 | unsigned int bmap_nr = block / (sb->s_blocksize << 3); |
218 | unsigned int bit_nr = block % (sb->s_blocksize << 3); | |
1da177e4 | 219 | |
bd4c625c | 220 | if (!jb->bitmaps[bmap_nr]) { |
a9dd3643 | 221 | jb->bitmaps[bmap_nr] = get_bitmap_node(sb); |
bd4c625c LT |
222 | } |
223 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); | |
224 | return 0; | |
1da177e4 LT |
225 | } |
226 | ||
a9dd3643 | 227 | static void cleanup_bitmap_list(struct super_block *sb, |
bd4c625c LT |
228 | struct reiserfs_list_bitmap *jb) |
229 | { | |
230 | int i; | |
231 | if (jb->bitmaps == NULL) | |
232 | return; | |
233 | ||
a9dd3643 | 234 | for (i = 0; i < reiserfs_bmap_count(sb); i++) { |
bd4c625c | 235 | if (jb->bitmaps[i]) { |
a9dd3643 | 236 | free_bitmap_node(sb, jb->bitmaps[i]); |
bd4c625c LT |
237 | jb->bitmaps[i] = NULL; |
238 | } | |
239 | } | |
1da177e4 LT |
240 | } |
241 | ||
242 | /* | |
243 | ** only call this on FS unmount. | |
244 | */ | |
a9dd3643 | 245 | static int free_list_bitmaps(struct super_block *sb, |
bd4c625c LT |
246 | struct reiserfs_list_bitmap *jb_array) |
247 | { | |
248 | int i; | |
249 | struct reiserfs_list_bitmap *jb; | |
250 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
251 | jb = jb_array + i; | |
252 | jb->journal_list = NULL; | |
a9dd3643 | 253 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
254 | vfree(jb->bitmaps); |
255 | jb->bitmaps = NULL; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
a9dd3643 | 260 | static int free_bitmap_nodes(struct super_block *sb) |
bd4c625c | 261 | { |
a9dd3643 | 262 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
263 | struct list_head *next = journal->j_bitmap_nodes.next; |
264 | struct reiserfs_bitmap_node *bn; | |
265 | ||
266 | while (next != &journal->j_bitmap_nodes) { | |
267 | bn = list_entry(next, struct reiserfs_bitmap_node, list); | |
268 | list_del(next); | |
d739b42b PE |
269 | kfree(bn->data); |
270 | kfree(bn); | |
bd4c625c LT |
271 | next = journal->j_bitmap_nodes.next; |
272 | journal->j_free_bitmap_nodes--; | |
273 | } | |
274 | ||
275 | return 0; | |
1da177e4 LT |
276 | } |
277 | ||
278 | /* | |
0222e657 | 279 | ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. |
1da177e4 LT |
280 | ** jb_array is the array to be filled in. |
281 | */ | |
a9dd3643 | 282 | int reiserfs_allocate_list_bitmaps(struct super_block *sb, |
bd4c625c | 283 | struct reiserfs_list_bitmap *jb_array, |
3ee16670 | 284 | unsigned int bmap_nr) |
bd4c625c LT |
285 | { |
286 | int i; | |
287 | int failed = 0; | |
288 | struct reiserfs_list_bitmap *jb; | |
289 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); | |
290 | ||
291 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
292 | jb = jb_array + i; | |
293 | jb->journal_list = NULL; | |
558feb08 | 294 | jb->bitmaps = vzalloc(mem); |
bd4c625c | 295 | if (!jb->bitmaps) { |
a9dd3643 | 296 | reiserfs_warning(sb, "clm-2000", "unable to " |
45b03d5e | 297 | "allocate bitmaps for journal lists"); |
bd4c625c LT |
298 | failed = 1; |
299 | break; | |
300 | } | |
bd4c625c LT |
301 | } |
302 | if (failed) { | |
a9dd3643 | 303 | free_list_bitmaps(sb, jb_array); |
bd4c625c LT |
304 | return -1; |
305 | } | |
306 | return 0; | |
1da177e4 LT |
307 | } |
308 | ||
309 | /* | |
0222e657 | 310 | ** find an available list bitmap. If you can't find one, flush a commit list |
1da177e4 LT |
311 | ** and try again |
312 | */ | |
a9dd3643 | 313 | static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, |
bd4c625c LT |
314 | struct reiserfs_journal_list |
315 | *jl) | |
316 | { | |
317 | int i, j; | |
a9dd3643 | 318 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
319 | struct reiserfs_list_bitmap *jb = NULL; |
320 | ||
321 | for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { | |
322 | i = journal->j_list_bitmap_index; | |
323 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; | |
324 | jb = journal->j_list_bitmap + i; | |
325 | if (journal->j_list_bitmap[i].journal_list) { | |
a9dd3643 | 326 | flush_commit_list(sb, |
bd4c625c LT |
327 | journal->j_list_bitmap[i]. |
328 | journal_list, 1); | |
329 | if (!journal->j_list_bitmap[i].journal_list) { | |
330 | break; | |
331 | } | |
332 | } else { | |
333 | break; | |
334 | } | |
335 | } | |
336 | if (jb->journal_list) { /* double check to make sure if flushed correctly */ | |
337 | return NULL; | |
338 | } | |
339 | jb->journal_list = jl; | |
340 | return jb; | |
1da177e4 LT |
341 | } |
342 | ||
0222e657 | 343 | /* |
1da177e4 LT |
344 | ** allocates a new chunk of X nodes, and links them all together as a list. |
345 | ** Uses the cnode->next and cnode->prev pointers | |
346 | ** returns NULL on failure | |
347 | */ | |
bd4c625c LT |
348 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) |
349 | { | |
350 | struct reiserfs_journal_cnode *head; | |
351 | int i; | |
352 | if (num_cnodes <= 0) { | |
353 | return NULL; | |
354 | } | |
558feb08 | 355 | head = vzalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); |
bd4c625c LT |
356 | if (!head) { |
357 | return NULL; | |
358 | } | |
bd4c625c LT |
359 | head[0].prev = NULL; |
360 | head[0].next = head + 1; | |
361 | for (i = 1; i < num_cnodes; i++) { | |
362 | head[i].prev = head + (i - 1); | |
363 | head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ | |
364 | } | |
365 | head[num_cnodes - 1].next = NULL; | |
366 | return head; | |
1da177e4 LT |
367 | } |
368 | ||
369 | /* | |
0222e657 | 370 | ** pulls a cnode off the free list, or returns NULL on failure |
1da177e4 | 371 | */ |
a9dd3643 | 372 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) |
bd4c625c LT |
373 | { |
374 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 375 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 376 | |
a9dd3643 | 377 | reiserfs_check_lock_depth(sb, "get_cnode"); |
bd4c625c LT |
378 | |
379 | if (journal->j_cnode_free <= 0) { | |
380 | return NULL; | |
381 | } | |
382 | journal->j_cnode_used++; | |
383 | journal->j_cnode_free--; | |
384 | cn = journal->j_cnode_free_list; | |
385 | if (!cn) { | |
386 | return cn; | |
387 | } | |
388 | if (cn->next) { | |
389 | cn->next->prev = NULL; | |
390 | } | |
391 | journal->j_cnode_free_list = cn->next; | |
392 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); | |
393 | return cn; | |
1da177e4 LT |
394 | } |
395 | ||
396 | /* | |
0222e657 | 397 | ** returns a cnode to the free list |
1da177e4 | 398 | */ |
a9dd3643 | 399 | static void free_cnode(struct super_block *sb, |
bd4c625c LT |
400 | struct reiserfs_journal_cnode *cn) |
401 | { | |
a9dd3643 | 402 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 403 | |
a9dd3643 | 404 | reiserfs_check_lock_depth(sb, "free_cnode"); |
1da177e4 | 405 | |
bd4c625c LT |
406 | journal->j_cnode_used--; |
407 | journal->j_cnode_free++; | |
408 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ | |
409 | cn->next = journal->j_cnode_free_list; | |
410 | if (journal->j_cnode_free_list) { | |
411 | journal->j_cnode_free_list->prev = cn; | |
412 | } | |
413 | cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ | |
414 | journal->j_cnode_free_list = cn; | |
1da177e4 LT |
415 | } |
416 | ||
bd4c625c LT |
417 | static void clear_prepared_bits(struct buffer_head *bh) |
418 | { | |
419 | clear_buffer_journal_prepared(bh); | |
420 | clear_buffer_journal_restore_dirty(bh); | |
1da177e4 LT |
421 | } |
422 | ||
1da177e4 | 423 | /* return a cnode with same dev, block number and size in table, or null if not found */ |
bd4c625c LT |
424 | static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct |
425 | super_block | |
426 | *sb, | |
427 | struct | |
428 | reiserfs_journal_cnode | |
429 | **table, | |
430 | long bl) | |
1da177e4 | 431 | { |
bd4c625c LT |
432 | struct reiserfs_journal_cnode *cn; |
433 | cn = journal_hash(table, sb, bl); | |
434 | while (cn) { | |
435 | if (cn->blocknr == bl && cn->sb == sb) | |
436 | return cn; | |
437 | cn = cn->hnext; | |
438 | } | |
439 | return (struct reiserfs_journal_cnode *)0; | |
1da177e4 LT |
440 | } |
441 | ||
442 | /* | |
443 | ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated | |
444 | ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever | |
445 | ** being overwritten by a replay after crashing. | |
446 | ** | |
447 | ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting | |
448 | ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make | |
449 | ** sure you never write the block without logging it. | |
450 | ** | |
451 | ** next_zero_bit is a suggestion about the next block to try for find_forward. | |
452 | ** when bl is rejected because it is set in a journal list bitmap, we search | |
453 | ** for the next zero bit in the bitmap that rejected bl. Then, we return that | |
454 | ** through next_zero_bit for find_forward to try. | |
455 | ** | |
456 | ** Just because we return something in next_zero_bit does not mean we won't | |
457 | ** reject it on the next call to reiserfs_in_journal | |
458 | ** | |
459 | */ | |
a9dd3643 | 460 | int reiserfs_in_journal(struct super_block *sb, |
3ee16670 | 461 | unsigned int bmap_nr, int bit_nr, int search_all, |
bd4c625c LT |
462 | b_blocknr_t * next_zero_bit) |
463 | { | |
a9dd3643 | 464 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
465 | struct reiserfs_journal_cnode *cn; |
466 | struct reiserfs_list_bitmap *jb; | |
467 | int i; | |
468 | unsigned long bl; | |
469 | ||
470 | *next_zero_bit = 0; /* always start this at zero. */ | |
471 | ||
a9dd3643 | 472 | PROC_INFO_INC(sb, journal.in_journal); |
bd4c625c LT |
473 | /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. |
474 | ** if we crash before the transaction that freed it commits, this transaction won't | |
475 | ** have committed either, and the block will never be written | |
476 | */ | |
477 | if (search_all) { | |
478 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
a9dd3643 | 479 | PROC_INFO_INC(sb, journal.in_journal_bitmap); |
bd4c625c LT |
480 | jb = journal->j_list_bitmap + i; |
481 | if (jb->journal_list && jb->bitmaps[bmap_nr] && | |
482 | test_bit(bit_nr, | |
483 | (unsigned long *)jb->bitmaps[bmap_nr]-> | |
484 | data)) { | |
485 | *next_zero_bit = | |
486 | find_next_zero_bit((unsigned long *) | |
487 | (jb->bitmaps[bmap_nr]-> | |
488 | data), | |
a9dd3643 | 489 | sb->s_blocksize << 3, |
bd4c625c LT |
490 | bit_nr + 1); |
491 | return 1; | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
a9dd3643 | 496 | bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; |
bd4c625c LT |
497 | /* is it in any old transactions? */ |
498 | if (search_all | |
499 | && (cn = | |
a9dd3643 | 500 | get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { |
bd4c625c LT |
501 | return 1; |
502 | } | |
503 | ||
504 | /* is it in the current transaction. This should never happen */ | |
a9dd3643 | 505 | if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) { |
bd4c625c LT |
506 | BUG(); |
507 | return 1; | |
508 | } | |
509 | ||
a9dd3643 | 510 | PROC_INFO_INC(sb, journal.in_journal_reusable); |
bd4c625c LT |
511 | /* safe for reuse */ |
512 | return 0; | |
1da177e4 LT |
513 | } |
514 | ||
515 | /* insert cn into table | |
516 | */ | |
bd4c625c LT |
517 | static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, |
518 | struct reiserfs_journal_cnode *cn) | |
519 | { | |
520 | struct reiserfs_journal_cnode *cn_orig; | |
1da177e4 | 521 | |
bd4c625c LT |
522 | cn_orig = journal_hash(table, cn->sb, cn->blocknr); |
523 | cn->hnext = cn_orig; | |
524 | cn->hprev = NULL; | |
525 | if (cn_orig) { | |
526 | cn_orig->hprev = cn; | |
527 | } | |
528 | journal_hash(table, cn->sb, cn->blocknr) = cn; | |
1da177e4 LT |
529 | } |
530 | ||
531 | /* lock the current transaction */ | |
a9dd3643 | 532 | static inline void lock_journal(struct super_block *sb) |
bd4c625c | 533 | { |
a9dd3643 | 534 | PROC_INFO_INC(sb, journal.lock_journal); |
8ebc4232 FW |
535 | |
536 | reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb); | |
1da177e4 LT |
537 | } |
538 | ||
539 | /* unlock the current transaction */ | |
a9dd3643 | 540 | static inline void unlock_journal(struct super_block *sb) |
bd4c625c | 541 | { |
a9dd3643 | 542 | mutex_unlock(&SB_JOURNAL(sb)->j_mutex); |
1da177e4 LT |
543 | } |
544 | ||
545 | static inline void get_journal_list(struct reiserfs_journal_list *jl) | |
546 | { | |
bd4c625c | 547 | jl->j_refcount++; |
1da177e4 LT |
548 | } |
549 | ||
550 | static inline void put_journal_list(struct super_block *s, | |
bd4c625c | 551 | struct reiserfs_journal_list *jl) |
1da177e4 | 552 | { |
bd4c625c | 553 | if (jl->j_refcount < 1) { |
c3a9c210 | 554 | reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d", |
bd4c625c LT |
555 | jl->j_trans_id, jl->j_refcount); |
556 | } | |
557 | if (--jl->j_refcount == 0) | |
d739b42b | 558 | kfree(jl); |
1da177e4 LT |
559 | } |
560 | ||
561 | /* | |
562 | ** this used to be much more involved, and I'm keeping it just in case things get ugly again. | |
563 | ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a | |
564 | ** transaction. | |
565 | */ | |
a9dd3643 | 566 | static void cleanup_freed_for_journal_list(struct super_block *sb, |
bd4c625c LT |
567 | struct reiserfs_journal_list *jl) |
568 | { | |
1da177e4 | 569 | |
bd4c625c LT |
570 | struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; |
571 | if (jb) { | |
a9dd3643 | 572 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
573 | } |
574 | jl->j_list_bitmap->journal_list = NULL; | |
575 | jl->j_list_bitmap = NULL; | |
1da177e4 LT |
576 | } |
577 | ||
578 | static int journal_list_still_alive(struct super_block *s, | |
600ed416 | 579 | unsigned int trans_id) |
bd4c625c LT |
580 | { |
581 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
582 | struct list_head *entry = &journal->j_journal_list; | |
583 | struct reiserfs_journal_list *jl; | |
584 | ||
585 | if (!list_empty(entry)) { | |
586 | jl = JOURNAL_LIST_ENTRY(entry->next); | |
587 | if (jl->j_trans_id <= trans_id) { | |
588 | return 1; | |
589 | } | |
590 | } | |
591 | return 0; | |
592 | } | |
593 | ||
398c95bd CM |
594 | /* |
595 | * If page->mapping was null, we failed to truncate this page for | |
596 | * some reason. Most likely because it was truncated after being | |
597 | * logged via data=journal. | |
598 | * | |
599 | * This does a check to see if the buffer belongs to one of these | |
600 | * lost pages before doing the final put_bh. If page->mapping was | |
601 | * null, it tries to free buffers on the page, which should make the | |
602 | * final page_cache_release drop the page from the lru. | |
603 | */ | |
604 | static void release_buffer_page(struct buffer_head *bh) | |
605 | { | |
606 | struct page *page = bh->b_page; | |
529ae9aa | 607 | if (!page->mapping && trylock_page(page)) { |
398c95bd CM |
608 | page_cache_get(page); |
609 | put_bh(bh); | |
610 | if (!page->mapping) | |
611 | try_to_free_buffers(page); | |
612 | unlock_page(page); | |
613 | page_cache_release(page); | |
614 | } else { | |
615 | put_bh(bh); | |
616 | } | |
617 | } | |
618 | ||
bd4c625c LT |
619 | static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) |
620 | { | |
621 | char b[BDEVNAME_SIZE]; | |
622 | ||
623 | if (buffer_journaled(bh)) { | |
45b03d5e JM |
624 | reiserfs_warning(NULL, "clm-2084", |
625 | "pinned buffer %lu:%s sent to disk", | |
bd4c625c LT |
626 | bh->b_blocknr, bdevname(bh->b_bdev, b)); |
627 | } | |
628 | if (uptodate) | |
629 | set_buffer_uptodate(bh); | |
630 | else | |
631 | clear_buffer_uptodate(bh); | |
398c95bd | 632 | |
bd4c625c | 633 | unlock_buffer(bh); |
398c95bd | 634 | release_buffer_page(bh); |
bd4c625c LT |
635 | } |
636 | ||
637 | static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) | |
638 | { | |
639 | if (uptodate) | |
640 | set_buffer_uptodate(bh); | |
641 | else | |
642 | clear_buffer_uptodate(bh); | |
643 | unlock_buffer(bh); | |
644 | put_bh(bh); | |
645 | } | |
646 | ||
647 | static void submit_logged_buffer(struct buffer_head *bh) | |
648 | { | |
649 | get_bh(bh); | |
650 | bh->b_end_io = reiserfs_end_buffer_io_sync; | |
651 | clear_buffer_journal_new(bh); | |
652 | clear_buffer_dirty(bh); | |
653 | if (!test_clear_buffer_journal_test(bh)) | |
654 | BUG(); | |
655 | if (!buffer_uptodate(bh)) | |
656 | BUG(); | |
657 | submit_bh(WRITE, bh); | |
658 | } | |
659 | ||
660 | static void submit_ordered_buffer(struct buffer_head *bh) | |
661 | { | |
662 | get_bh(bh); | |
663 | bh->b_end_io = reiserfs_end_ordered_io; | |
664 | clear_buffer_dirty(bh); | |
665 | if (!buffer_uptodate(bh)) | |
666 | BUG(); | |
667 | submit_bh(WRITE, bh); | |
668 | } | |
669 | ||
1da177e4 LT |
670 | #define CHUNK_SIZE 32 |
671 | struct buffer_chunk { | |
bd4c625c LT |
672 | struct buffer_head *bh[CHUNK_SIZE]; |
673 | int nr; | |
1da177e4 LT |
674 | }; |
675 | ||
bd4c625c LT |
676 | static void write_chunk(struct buffer_chunk *chunk) |
677 | { | |
678 | int i; | |
bd4c625c LT |
679 | for (i = 0; i < chunk->nr; i++) { |
680 | submit_logged_buffer(chunk->bh[i]); | |
681 | } | |
682 | chunk->nr = 0; | |
1da177e4 LT |
683 | } |
684 | ||
bd4c625c LT |
685 | static void write_ordered_chunk(struct buffer_chunk *chunk) |
686 | { | |
687 | int i; | |
bd4c625c LT |
688 | for (i = 0; i < chunk->nr; i++) { |
689 | submit_ordered_buffer(chunk->bh[i]); | |
690 | } | |
691 | chunk->nr = 0; | |
1da177e4 LT |
692 | } |
693 | ||
694 | static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, | |
bd4c625c | 695 | spinlock_t * lock, void (fn) (struct buffer_chunk *)) |
1da177e4 | 696 | { |
bd4c625c | 697 | int ret = 0; |
14a61442 | 698 | BUG_ON(chunk->nr >= CHUNK_SIZE); |
bd4c625c LT |
699 | chunk->bh[chunk->nr++] = bh; |
700 | if (chunk->nr >= CHUNK_SIZE) { | |
701 | ret = 1; | |
702 | if (lock) | |
703 | spin_unlock(lock); | |
704 | fn(chunk); | |
705 | if (lock) | |
706 | spin_lock(lock); | |
707 | } | |
708 | return ret; | |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 | 711 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); |
bd4c625c LT |
712 | static struct reiserfs_jh *alloc_jh(void) |
713 | { | |
714 | struct reiserfs_jh *jh; | |
715 | while (1) { | |
716 | jh = kmalloc(sizeof(*jh), GFP_NOFS); | |
717 | if (jh) { | |
718 | atomic_inc(&nr_reiserfs_jh); | |
719 | return jh; | |
720 | } | |
721 | yield(); | |
1da177e4 | 722 | } |
1da177e4 LT |
723 | } |
724 | ||
725 | /* | |
726 | * we want to free the jh when the buffer has been written | |
727 | * and waited on | |
728 | */ | |
bd4c625c LT |
729 | void reiserfs_free_jh(struct buffer_head *bh) |
730 | { | |
731 | struct reiserfs_jh *jh; | |
732 | ||
733 | jh = bh->b_private; | |
734 | if (jh) { | |
735 | bh->b_private = NULL; | |
736 | jh->bh = NULL; | |
737 | list_del_init(&jh->list); | |
738 | kfree(jh); | |
739 | if (atomic_read(&nr_reiserfs_jh) <= 0) | |
740 | BUG(); | |
741 | atomic_dec(&nr_reiserfs_jh); | |
742 | put_bh(bh); | |
743 | } | |
1da177e4 LT |
744 | } |
745 | ||
746 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, | |
bd4c625c | 747 | int tail) |
1da177e4 | 748 | { |
bd4c625c | 749 | struct reiserfs_jh *jh; |
1da177e4 | 750 | |
bd4c625c LT |
751 | if (bh->b_private) { |
752 | spin_lock(&j->j_dirty_buffers_lock); | |
753 | if (!bh->b_private) { | |
754 | spin_unlock(&j->j_dirty_buffers_lock); | |
755 | goto no_jh; | |
756 | } | |
757 | jh = bh->b_private; | |
758 | list_del_init(&jh->list); | |
759 | } else { | |
760 | no_jh: | |
761 | get_bh(bh); | |
762 | jh = alloc_jh(); | |
763 | spin_lock(&j->j_dirty_buffers_lock); | |
764 | /* buffer must be locked for __add_jh, should be able to have | |
765 | * two adds at the same time | |
766 | */ | |
14a61442 | 767 | BUG_ON(bh->b_private); |
bd4c625c LT |
768 | jh->bh = bh; |
769 | bh->b_private = jh; | |
1da177e4 | 770 | } |
bd4c625c LT |
771 | jh->jl = j->j_current_jl; |
772 | if (tail) | |
773 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); | |
774 | else { | |
775 | list_add_tail(&jh->list, &jh->jl->j_bh_list); | |
776 | } | |
777 | spin_unlock(&j->j_dirty_buffers_lock); | |
778 | return 0; | |
1da177e4 LT |
779 | } |
780 | ||
bd4c625c LT |
781 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) |
782 | { | |
783 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); | |
1da177e4 | 784 | } |
bd4c625c LT |
785 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) |
786 | { | |
787 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); | |
1da177e4 LT |
788 | } |
789 | ||
790 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) | |
bd4c625c | 791 | static int write_ordered_buffers(spinlock_t * lock, |
1da177e4 | 792 | struct reiserfs_journal *j, |
bd4c625c | 793 | struct reiserfs_journal_list *jl, |
1da177e4 LT |
794 | struct list_head *list) |
795 | { | |
bd4c625c LT |
796 | struct buffer_head *bh; |
797 | struct reiserfs_jh *jh; | |
798 | int ret = j->j_errno; | |
799 | struct buffer_chunk chunk; | |
800 | struct list_head tmp; | |
801 | INIT_LIST_HEAD(&tmp); | |
802 | ||
803 | chunk.nr = 0; | |
804 | spin_lock(lock); | |
805 | while (!list_empty(list)) { | |
806 | jh = JH_ENTRY(list->next); | |
807 | bh = jh->bh; | |
808 | get_bh(bh); | |
ca5de404 | 809 | if (!trylock_buffer(bh)) { |
bd4c625c | 810 | if (!buffer_dirty(bh)) { |
f116629d | 811 | list_move(&jh->list, &tmp); |
bd4c625c LT |
812 | goto loop_next; |
813 | } | |
814 | spin_unlock(lock); | |
815 | if (chunk.nr) | |
816 | write_ordered_chunk(&chunk); | |
817 | wait_on_buffer(bh); | |
818 | cond_resched(); | |
819 | spin_lock(lock); | |
820 | goto loop_next; | |
821 | } | |
3d4492f8 CM |
822 | /* in theory, dirty non-uptodate buffers should never get here, |
823 | * but the upper layer io error paths still have a few quirks. | |
824 | * Handle them here as gracefully as we can | |
825 | */ | |
826 | if (!buffer_uptodate(bh) && buffer_dirty(bh)) { | |
827 | clear_buffer_dirty(bh); | |
828 | ret = -EIO; | |
829 | } | |
bd4c625c | 830 | if (buffer_dirty(bh)) { |
f116629d | 831 | list_move(&jh->list, &tmp); |
bd4c625c LT |
832 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); |
833 | } else { | |
834 | reiserfs_free_jh(bh); | |
835 | unlock_buffer(bh); | |
836 | } | |
837 | loop_next: | |
838 | put_bh(bh); | |
839 | cond_resched_lock(lock); | |
840 | } | |
841 | if (chunk.nr) { | |
842 | spin_unlock(lock); | |
1da177e4 | 843 | write_ordered_chunk(&chunk); |
bd4c625c | 844 | spin_lock(lock); |
1da177e4 | 845 | } |
bd4c625c LT |
846 | while (!list_empty(&tmp)) { |
847 | jh = JH_ENTRY(tmp.prev); | |
848 | bh = jh->bh; | |
849 | get_bh(bh); | |
850 | reiserfs_free_jh(bh); | |
851 | ||
852 | if (buffer_locked(bh)) { | |
853 | spin_unlock(lock); | |
854 | wait_on_buffer(bh); | |
855 | spin_lock(lock); | |
856 | } | |
857 | if (!buffer_uptodate(bh)) { | |
858 | ret = -EIO; | |
859 | } | |
d62b1b87 CM |
860 | /* ugly interaction with invalidatepage here. |
861 | * reiserfs_invalidate_page will pin any buffer that has a valid | |
862 | * journal head from an older transaction. If someone else sets | |
863 | * our buffer dirty after we write it in the first loop, and | |
864 | * then someone truncates the page away, nobody will ever write | |
865 | * the buffer. We're safe if we write the page one last time | |
866 | * after freeing the journal header. | |
867 | */ | |
868 | if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { | |
869 | spin_unlock(lock); | |
870 | ll_rw_block(WRITE, 1, &bh); | |
871 | spin_lock(lock); | |
872 | } | |
bd4c625c LT |
873 | put_bh(bh); |
874 | cond_resched_lock(lock); | |
1da177e4 | 875 | } |
bd4c625c LT |
876 | spin_unlock(lock); |
877 | return ret; | |
878 | } | |
1da177e4 | 879 | |
bd4c625c LT |
880 | static int flush_older_commits(struct super_block *s, |
881 | struct reiserfs_journal_list *jl) | |
882 | { | |
883 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
884 | struct reiserfs_journal_list *other_jl; | |
885 | struct reiserfs_journal_list *first_jl; | |
886 | struct list_head *entry; | |
600ed416 JM |
887 | unsigned int trans_id = jl->j_trans_id; |
888 | unsigned int other_trans_id; | |
889 | unsigned int first_trans_id; | |
bd4c625c LT |
890 | |
891 | find_first: | |
892 | /* | |
893 | * first we walk backwards to find the oldest uncommitted transation | |
894 | */ | |
895 | first_jl = jl; | |
896 | entry = jl->j_list.prev; | |
897 | while (1) { | |
898 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
899 | if (entry == &journal->j_journal_list || | |
900 | atomic_read(&other_jl->j_older_commits_done)) | |
901 | break; | |
1da177e4 | 902 | |
bd4c625c LT |
903 | first_jl = other_jl; |
904 | entry = other_jl->j_list.prev; | |
905 | } | |
1da177e4 | 906 | |
bd4c625c LT |
907 | /* if we didn't find any older uncommitted transactions, return now */ |
908 | if (first_jl == jl) { | |
909 | return 0; | |
910 | } | |
1da177e4 | 911 | |
bd4c625c LT |
912 | first_trans_id = first_jl->j_trans_id; |
913 | ||
914 | entry = &first_jl->j_list; | |
915 | while (1) { | |
916 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
917 | other_trans_id = other_jl->j_trans_id; | |
918 | ||
919 | if (other_trans_id < trans_id) { | |
920 | if (atomic_read(&other_jl->j_commit_left) != 0) { | |
921 | flush_commit_list(s, other_jl, 0); | |
922 | ||
923 | /* list we were called with is gone, return */ | |
924 | if (!journal_list_still_alive(s, trans_id)) | |
925 | return 1; | |
926 | ||
927 | /* the one we just flushed is gone, this means all | |
928 | * older lists are also gone, so first_jl is no longer | |
929 | * valid either. Go back to the beginning. | |
930 | */ | |
931 | if (!journal_list_still_alive | |
932 | (s, other_trans_id)) { | |
933 | goto find_first; | |
934 | } | |
935 | } | |
936 | entry = entry->next; | |
937 | if (entry == &journal->j_journal_list) | |
938 | return 0; | |
939 | } else { | |
940 | return 0; | |
1da177e4 | 941 | } |
1da177e4 | 942 | } |
bd4c625c | 943 | return 0; |
1da177e4 | 944 | } |
deba0f49 AB |
945 | |
946 | static int reiserfs_async_progress_wait(struct super_block *s) | |
bd4c625c | 947 | { |
bd4c625c | 948 | struct reiserfs_journal *j = SB_JOURNAL(s); |
8ebc4232 FW |
949 | |
950 | if (atomic_read(&j->j_async_throttle)) { | |
951 | reiserfs_write_unlock(s); | |
8aa7e847 | 952 | congestion_wait(BLK_RW_ASYNC, HZ / 10); |
8ebc4232 FW |
953 | reiserfs_write_lock(s); |
954 | } | |
955 | ||
bd4c625c | 956 | return 0; |
1da177e4 LT |
957 | } |
958 | ||
959 | /* | |
960 | ** if this journal list still has commit blocks unflushed, send them to disk. | |
961 | ** | |
962 | ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) | |
963 | ** Before the commit block can by written, every other log block must be safely on disk | |
964 | ** | |
965 | */ | |
bd4c625c LT |
966 | static int flush_commit_list(struct super_block *s, |
967 | struct reiserfs_journal_list *jl, int flushall) | |
968 | { | |
969 | int i; | |
3ee16670 | 970 | b_blocknr_t bn; |
bd4c625c | 971 | struct buffer_head *tbh = NULL; |
600ed416 | 972 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 973 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
bd4c625c | 974 | int retval = 0; |
e0e851cf | 975 | int write_len; |
bd4c625c LT |
976 | |
977 | reiserfs_check_lock_depth(s, "flush_commit_list"); | |
978 | ||
979 | if (atomic_read(&jl->j_older_commits_done)) { | |
980 | return 0; | |
981 | } | |
982 | ||
bd4c625c LT |
983 | /* before we can put our commit blocks on disk, we have to make sure everyone older than |
984 | ** us is on disk too | |
985 | */ | |
986 | BUG_ON(jl->j_len <= 0); | |
987 | BUG_ON(trans_id == journal->j_trans_id); | |
988 | ||
989 | get_journal_list(jl); | |
990 | if (flushall) { | |
991 | if (flush_older_commits(s, jl) == 1) { | |
992 | /* list disappeared during flush_older_commits. return */ | |
993 | goto put_jl; | |
994 | } | |
995 | } | |
996 | ||
997 | /* make sure nobody is trying to flush this one at the same time */ | |
8ebc4232 FW |
998 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); |
999 | ||
bd4c625c | 1000 | if (!journal_list_still_alive(s, trans_id)) { |
90415dea | 1001 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1002 | goto put_jl; |
1003 | } | |
1004 | BUG_ON(jl->j_trans_id == 0); | |
1005 | ||
1006 | /* this commit is done, exit */ | |
1007 | if (atomic_read(&(jl->j_commit_left)) <= 0) { | |
1008 | if (flushall) { | |
1009 | atomic_set(&(jl->j_older_commits_done), 1); | |
1010 | } | |
90415dea | 1011 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1012 | goto put_jl; |
1013 | } | |
1014 | ||
1015 | if (!list_empty(&jl->j_bh_list)) { | |
3d4492f8 | 1016 | int ret; |
8ebc4232 FW |
1017 | |
1018 | /* | |
1019 | * We might sleep in numerous places inside | |
1020 | * write_ordered_buffers. Relax the write lock. | |
1021 | */ | |
1022 | reiserfs_write_unlock(s); | |
3d4492f8 CM |
1023 | ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, |
1024 | journal, jl, &jl->j_bh_list); | |
1025 | if (ret < 0 && retval == 0) | |
1026 | retval = ret; | |
8ebc4232 | 1027 | reiserfs_write_lock(s); |
bd4c625c LT |
1028 | } |
1029 | BUG_ON(!list_empty(&jl->j_bh_list)); | |
1030 | /* | |
1031 | * for the description block and all the log blocks, submit any buffers | |
e0e851cf CM |
1032 | * that haven't already reached the disk. Try to write at least 256 |
1033 | * log blocks. later on, we will only wait on blocks that correspond | |
1034 | * to this transaction, but while we're unplugging we might as well | |
1035 | * get a chunk of data on there. | |
bd4c625c LT |
1036 | */ |
1037 | atomic_inc(&journal->j_async_throttle); | |
e0e851cf CM |
1038 | write_len = jl->j_len + 1; |
1039 | if (write_len < 256) | |
1040 | write_len = 256; | |
1041 | for (i = 0 ; i < write_len ; i++) { | |
bd4c625c LT |
1042 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % |
1043 | SB_ONDISK_JOURNAL_SIZE(s); | |
1044 | tbh = journal_find_get_block(s, bn); | |
e0e851cf | 1045 | if (tbh) { |
6e3647ac FW |
1046 | if (buffer_dirty(tbh)) { |
1047 | reiserfs_write_unlock(s); | |
1048 | ll_rw_block(WRITE, 1, &tbh); | |
1049 | reiserfs_write_lock(s); | |
1050 | } | |
e0e851cf CM |
1051 | put_bh(tbh) ; |
1052 | } | |
bd4c625c LT |
1053 | } |
1054 | atomic_dec(&journal->j_async_throttle); | |
1055 | ||
bd4c625c LT |
1056 | for (i = 0; i < (jl->j_len + 1); i++) { |
1057 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + | |
1058 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); | |
1059 | tbh = journal_find_get_block(s, bn); | |
8ebc4232 FW |
1060 | |
1061 | reiserfs_write_unlock(s); | |
bd4c625c | 1062 | wait_on_buffer(tbh); |
8ebc4232 | 1063 | reiserfs_write_lock(s); |
bd4c625c LT |
1064 | // since we're using ll_rw_blk above, it might have skipped over |
1065 | // a locked buffer. Double check here | |
1066 | // | |
8ebc4232 FW |
1067 | /* redundant, sync_dirty_buffer() checks */ |
1068 | if (buffer_dirty(tbh)) { | |
1069 | reiserfs_write_unlock(s); | |
bd4c625c | 1070 | sync_dirty_buffer(tbh); |
8ebc4232 FW |
1071 | reiserfs_write_lock(s); |
1072 | } | |
bd4c625c | 1073 | if (unlikely(!buffer_uptodate(tbh))) { |
1da177e4 | 1074 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1075 | reiserfs_warning(s, "journal-601", |
1076 | "buffer write failed"); | |
1da177e4 | 1077 | #endif |
bd4c625c LT |
1078 | retval = -EIO; |
1079 | } | |
1080 | put_bh(tbh); /* once for journal_find_get_block */ | |
1081 | put_bh(tbh); /* once due to original getblk in do_journal_end */ | |
1082 | atomic_dec(&(jl->j_commit_left)); | |
1083 | } | |
1084 | ||
1085 | BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); | |
1086 | ||
7cd33ad2 CH |
1087 | /* If there was a write error in the journal - we can't commit |
1088 | * this transaction - it will be invalid and, if successful, | |
1089 | * will just end up propagating the write error out to | |
1090 | * the file system. */ | |
1091 | if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { | |
1092 | if (buffer_dirty(jl->j_commit_bh)) | |
1093 | BUG(); | |
1094 | mark_buffer_dirty(jl->j_commit_bh) ; | |
8ebc4232 | 1095 | reiserfs_write_unlock(s); |
7cd33ad2 CH |
1096 | if (reiserfs_barrier_flush(s)) |
1097 | __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); | |
1098 | else | |
1099 | sync_dirty_buffer(jl->j_commit_bh); | |
8ebc4232 FW |
1100 | reiserfs_write_lock(s); |
1101 | } | |
bd4c625c | 1102 | |
bd4c625c LT |
1103 | /* If there was a write error in the journal - we can't commit this |
1104 | * transaction - it will be invalid and, if successful, will just end | |
beb7dd86 | 1105 | * up propagating the write error out to the filesystem. */ |
bd4c625c | 1106 | if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { |
1da177e4 | 1107 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e | 1108 | reiserfs_warning(s, "journal-615", "buffer write failed"); |
1da177e4 | 1109 | #endif |
bd4c625c LT |
1110 | retval = -EIO; |
1111 | } | |
1112 | bforget(jl->j_commit_bh); | |
1113 | if (journal->j_last_commit_id != 0 && | |
1114 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { | |
45b03d5e | 1115 | reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", |
bd4c625c LT |
1116 | journal->j_last_commit_id, jl->j_trans_id); |
1117 | } | |
1118 | journal->j_last_commit_id = jl->j_trans_id; | |
1119 | ||
1120 | /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ | |
1121 | cleanup_freed_for_journal_list(s, jl); | |
1122 | ||
1123 | retval = retval ? retval : journal->j_errno; | |
1124 | ||
1125 | /* mark the metadata dirty */ | |
1126 | if (!retval) | |
1127 | dirty_one_transaction(s, jl); | |
1128 | atomic_dec(&(jl->j_commit_left)); | |
1129 | ||
1130 | if (flushall) { | |
1131 | atomic_set(&(jl->j_older_commits_done), 1); | |
1132 | } | |
90415dea | 1133 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1134 | put_jl: |
1135 | put_journal_list(s, jl); | |
1136 | ||
1137 | if (retval) | |
1138 | reiserfs_abort(s, retval, "Journal write error in %s", | |
fbe5498b | 1139 | __func__); |
bd4c625c | 1140 | return retval; |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | /* | |
0222e657 JM |
1144 | ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or |
1145 | ** returns NULL if it can't find anything | |
1da177e4 | 1146 | */ |
bd4c625c LT |
1147 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct |
1148 | reiserfs_journal_cnode | |
1149 | *cn) | |
1150 | { | |
1151 | struct super_block *sb = cn->sb; | |
1152 | b_blocknr_t blocknr = cn->blocknr; | |
1da177e4 | 1153 | |
bd4c625c LT |
1154 | cn = cn->hprev; |
1155 | while (cn) { | |
1156 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { | |
1157 | return cn->jlist; | |
1158 | } | |
1159 | cn = cn->hprev; | |
1160 | } | |
1161 | return NULL; | |
1da177e4 LT |
1162 | } |
1163 | ||
a3172027 CM |
1164 | static int newer_jl_done(struct reiserfs_journal_cnode *cn) |
1165 | { | |
1166 | struct super_block *sb = cn->sb; | |
1167 | b_blocknr_t blocknr = cn->blocknr; | |
1168 | ||
1169 | cn = cn->hprev; | |
1170 | while (cn) { | |
1171 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist && | |
1172 | atomic_read(&cn->jlist->j_commit_left) != 0) | |
1173 | return 0; | |
1174 | cn = cn->hprev; | |
1175 | } | |
1176 | return 1; | |
1177 | } | |
1178 | ||
bd4c625c LT |
1179 | static void remove_journal_hash(struct super_block *, |
1180 | struct reiserfs_journal_cnode **, | |
1181 | struct reiserfs_journal_list *, unsigned long, | |
1182 | int); | |
1da177e4 LT |
1183 | |
1184 | /* | |
1185 | ** once all the real blocks have been flushed, it is safe to remove them from the | |
1186 | ** journal list for this transaction. Aside from freeing the cnode, this also allows the | |
1187 | ** block to be reallocated for data blocks if it had been deleted. | |
1188 | */ | |
a9dd3643 | 1189 | static void remove_all_from_journal_list(struct super_block *sb, |
bd4c625c LT |
1190 | struct reiserfs_journal_list *jl, |
1191 | int debug) | |
1192 | { | |
a9dd3643 | 1193 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1194 | struct reiserfs_journal_cnode *cn, *last; |
1195 | cn = jl->j_realblock; | |
1196 | ||
1197 | /* which is better, to lock once around the whole loop, or | |
1198 | ** to lock for each call to remove_journal_hash? | |
1199 | */ | |
1200 | while (cn) { | |
1201 | if (cn->blocknr != 0) { | |
1202 | if (debug) { | |
a9dd3643 | 1203 | reiserfs_warning(sb, "reiserfs-2201", |
bd4c625c LT |
1204 | "block %u, bh is %d, state %ld", |
1205 | cn->blocknr, cn->bh ? 1 : 0, | |
1206 | cn->state); | |
1207 | } | |
1208 | cn->state = 0; | |
a9dd3643 | 1209 | remove_journal_hash(sb, journal->j_list_hash_table, |
bd4c625c LT |
1210 | jl, cn->blocknr, 1); |
1211 | } | |
1212 | last = cn; | |
1213 | cn = cn->next; | |
a9dd3643 | 1214 | free_cnode(sb, last); |
bd4c625c LT |
1215 | } |
1216 | jl->j_realblock = NULL; | |
1da177e4 LT |
1217 | } |
1218 | ||
1219 | /* | |
1220 | ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. | |
1221 | ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start | |
1222 | ** releasing blocks in this transaction for reuse as data blocks. | |
1223 | ** called by flush_journal_list, before it calls remove_all_from_journal_list | |
1224 | ** | |
1225 | */ | |
a9dd3643 | 1226 | static int _update_journal_header_block(struct super_block *sb, |
bd4c625c | 1227 | unsigned long offset, |
600ed416 | 1228 | unsigned int trans_id) |
bd4c625c LT |
1229 | { |
1230 | struct reiserfs_journal_header *jh; | |
a9dd3643 | 1231 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 1232 | |
bd4c625c LT |
1233 | if (reiserfs_is_journal_aborted(journal)) |
1234 | return -EIO; | |
1da177e4 | 1235 | |
bd4c625c LT |
1236 | if (trans_id >= journal->j_last_flush_trans_id) { |
1237 | if (buffer_locked((journal->j_header_bh))) { | |
8ebc4232 | 1238 | reiserfs_write_unlock(sb); |
bd4c625c | 1239 | wait_on_buffer((journal->j_header_bh)); |
8ebc4232 | 1240 | reiserfs_write_lock(sb); |
bd4c625c | 1241 | if (unlikely(!buffer_uptodate(journal->j_header_bh))) { |
1da177e4 | 1242 | #ifdef CONFIG_REISERFS_CHECK |
a9dd3643 | 1243 | reiserfs_warning(sb, "journal-699", |
45b03d5e | 1244 | "buffer write failed"); |
1da177e4 | 1245 | #endif |
bd4c625c LT |
1246 | return -EIO; |
1247 | } | |
1248 | } | |
1249 | journal->j_last_flush_trans_id = trans_id; | |
1250 | journal->j_first_unflushed_offset = offset; | |
1251 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> | |
1252 | b_data); | |
1253 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id); | |
1254 | jh->j_first_unflushed_offset = cpu_to_le32(offset); | |
1255 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id); | |
1256 | ||
7cd33ad2 CH |
1257 | set_buffer_dirty(journal->j_header_bh); |
1258 | reiserfs_write_unlock(sb); | |
1259 | ||
1260 | if (reiserfs_barrier_flush(sb)) | |
1261 | __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); | |
1262 | else | |
bd4c625c | 1263 | sync_dirty_buffer(journal->j_header_bh); |
7cd33ad2 CH |
1264 | |
1265 | reiserfs_write_lock(sb); | |
bd4c625c | 1266 | if (!buffer_uptodate(journal->j_header_bh)) { |
a9dd3643 | 1267 | reiserfs_warning(sb, "journal-837", |
45b03d5e | 1268 | "IO error during journal replay"); |
bd4c625c LT |
1269 | return -EIO; |
1270 | } | |
1271 | } | |
1272 | return 0; | |
1273 | } | |
1274 | ||
a9dd3643 | 1275 | static int update_journal_header_block(struct super_block *sb, |
bd4c625c | 1276 | unsigned long offset, |
600ed416 | 1277 | unsigned int trans_id) |
bd4c625c | 1278 | { |
a9dd3643 | 1279 | return _update_journal_header_block(sb, offset, trans_id); |
1da177e4 | 1280 | } |
bd4c625c | 1281 | |
0222e657 JM |
1282 | /* |
1283 | ** flush any and all journal lists older than you are | |
1da177e4 LT |
1284 | ** can only be called from flush_journal_list |
1285 | */ | |
a9dd3643 | 1286 | static int flush_older_journal_lists(struct super_block *sb, |
bd4c625c LT |
1287 | struct reiserfs_journal_list *jl) |
1288 | { | |
1289 | struct list_head *entry; | |
1290 | struct reiserfs_journal_list *other_jl; | |
a9dd3643 | 1291 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
600ed416 | 1292 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c LT |
1293 | |
1294 | /* we know we are the only ones flushing things, no extra race | |
1295 | * protection is required. | |
1296 | */ | |
1297 | restart: | |
1298 | entry = journal->j_journal_list.next; | |
1299 | /* Did we wrap? */ | |
1300 | if (entry == &journal->j_journal_list) | |
1301 | return 0; | |
1302 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
1303 | if (other_jl->j_trans_id < trans_id) { | |
1304 | BUG_ON(other_jl->j_refcount <= 0); | |
1305 | /* do not flush all */ | |
a9dd3643 | 1306 | flush_journal_list(sb, other_jl, 0); |
bd4c625c LT |
1307 | |
1308 | /* other_jl is now deleted from the list */ | |
1309 | goto restart; | |
1310 | } | |
1311 | return 0; | |
1da177e4 LT |
1312 | } |
1313 | ||
1314 | static void del_from_work_list(struct super_block *s, | |
bd4c625c LT |
1315 | struct reiserfs_journal_list *jl) |
1316 | { | |
1317 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1318 | if (!list_empty(&jl->j_working_list)) { | |
1319 | list_del_init(&jl->j_working_list); | |
1320 | journal->j_num_work_lists--; | |
1321 | } | |
1da177e4 LT |
1322 | } |
1323 | ||
1324 | /* flush a journal list, both commit and real blocks | |
1325 | ** | |
1326 | ** always set flushall to 1, unless you are calling from inside | |
1327 | ** flush_journal_list | |
1328 | ** | |
0222e657 JM |
1329 | ** IMPORTANT. This can only be called while there are no journal writers, |
1330 | ** and the journal is locked. That means it can only be called from | |
1da177e4 LT |
1331 | ** do_journal_end, or by journal_release |
1332 | */ | |
bd4c625c LT |
1333 | static int flush_journal_list(struct super_block *s, |
1334 | struct reiserfs_journal_list *jl, int flushall) | |
1da177e4 | 1335 | { |
bd4c625c LT |
1336 | struct reiserfs_journal_list *pjl; |
1337 | struct reiserfs_journal_cnode *cn, *last; | |
1338 | int count; | |
1339 | int was_jwait = 0; | |
1340 | int was_dirty = 0; | |
1341 | struct buffer_head *saved_bh; | |
1342 | unsigned long j_len_saved = jl->j_len; | |
1343 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1344 | int err = 0; | |
1345 | ||
1346 | BUG_ON(j_len_saved <= 0); | |
1347 | ||
1348 | if (atomic_read(&journal->j_wcount) != 0) { | |
45b03d5e | 1349 | reiserfs_warning(s, "clm-2048", "called with wcount %d", |
bd4c625c LT |
1350 | atomic_read(&journal->j_wcount)); |
1351 | } | |
1352 | BUG_ON(jl->j_trans_id == 0); | |
1da177e4 | 1353 | |
bd4c625c LT |
1354 | /* if flushall == 0, the lock is already held */ |
1355 | if (flushall) { | |
8ebc4232 | 1356 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
afe70259 | 1357 | } else if (mutex_trylock(&journal->j_flush_mutex)) { |
bd4c625c LT |
1358 | BUG(); |
1359 | } | |
1da177e4 | 1360 | |
bd4c625c LT |
1361 | count = 0; |
1362 | if (j_len_saved > journal->j_trans_max) { | |
c3a9c210 | 1363 | reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", |
bd4c625c LT |
1364 | j_len_saved, jl->j_trans_id); |
1365 | return 0; | |
1366 | } | |
1da177e4 | 1367 | |
bd4c625c LT |
1368 | /* if all the work is already done, get out of here */ |
1369 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1370 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1371 | goto flush_older_and_return; | |
1372 | } | |
1373 | ||
0222e657 | 1374 | /* start by putting the commit list on disk. This will also flush |
bd4c625c LT |
1375 | ** the commit lists of any olders transactions |
1376 | */ | |
1377 | flush_commit_list(s, jl, 1); | |
1378 | ||
1379 | if (!(jl->j_state & LIST_DIRTY) | |
1380 | && !reiserfs_is_journal_aborted(journal)) | |
1381 | BUG(); | |
1382 | ||
1383 | /* are we done now? */ | |
1384 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1385 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1386 | goto flush_older_and_return; | |
1387 | } | |
1388 | ||
0222e657 JM |
1389 | /* loop through each cnode, see if we need to write it, |
1390 | ** or wait on a more recent transaction, or just ignore it | |
bd4c625c LT |
1391 | */ |
1392 | if (atomic_read(&(journal->j_wcount)) != 0) { | |
c3a9c210 JM |
1393 | reiserfs_panic(s, "journal-844", "journal list is flushing, " |
1394 | "wcount is not 0"); | |
bd4c625c LT |
1395 | } |
1396 | cn = jl->j_realblock; | |
1397 | while (cn) { | |
1398 | was_jwait = 0; | |
1399 | was_dirty = 0; | |
1400 | saved_bh = NULL; | |
1401 | /* blocknr of 0 is no longer in the hash, ignore it */ | |
1402 | if (cn->blocknr == 0) { | |
1403 | goto free_cnode; | |
1404 | } | |
1405 | ||
1406 | /* This transaction failed commit. Don't write out to the disk */ | |
1407 | if (!(jl->j_state & LIST_DIRTY)) | |
1408 | goto free_cnode; | |
1409 | ||
1410 | pjl = find_newer_jl_for_cn(cn); | |
1411 | /* the order is important here. We check pjl to make sure we | |
1412 | ** don't clear BH_JDirty_wait if we aren't the one writing this | |
1413 | ** block to disk | |
1414 | */ | |
1415 | if (!pjl && cn->bh) { | |
1416 | saved_bh = cn->bh; | |
1417 | ||
0222e657 JM |
1418 | /* we do this to make sure nobody releases the buffer while |
1419 | ** we are working with it | |
bd4c625c LT |
1420 | */ |
1421 | get_bh(saved_bh); | |
1422 | ||
1423 | if (buffer_journal_dirty(saved_bh)) { | |
1424 | BUG_ON(!can_dirty(cn)); | |
1425 | was_jwait = 1; | |
1426 | was_dirty = 1; | |
1427 | } else if (can_dirty(cn)) { | |
1428 | /* everything with !pjl && jwait should be writable */ | |
1429 | BUG(); | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | /* if someone has this block in a newer transaction, just make | |
0779bf2d | 1434 | ** sure they are committed, and don't try writing it to disk |
bd4c625c LT |
1435 | */ |
1436 | if (pjl) { | |
1437 | if (atomic_read(&pjl->j_commit_left)) | |
1438 | flush_commit_list(s, pjl, 1); | |
1439 | goto free_cnode; | |
1440 | } | |
1441 | ||
0222e657 JM |
1442 | /* bh == NULL when the block got to disk on its own, OR, |
1443 | ** the block got freed in a future transaction | |
bd4c625c LT |
1444 | */ |
1445 | if (saved_bh == NULL) { | |
1446 | goto free_cnode; | |
1447 | } | |
1448 | ||
1449 | /* this should never happen. kupdate_one_transaction has this list | |
1450 | ** locked while it works, so we should never see a buffer here that | |
1451 | ** is not marked JDirty_wait | |
1452 | */ | |
1453 | if ((!was_jwait) && !buffer_locked(saved_bh)) { | |
45b03d5e JM |
1454 | reiserfs_warning(s, "journal-813", |
1455 | "BAD! buffer %llu %cdirty %cjwait, " | |
bd4c625c LT |
1456 | "not in a newer tranasction", |
1457 | (unsigned long long)saved_bh-> | |
1458 | b_blocknr, was_dirty ? ' ' : '!', | |
1459 | was_jwait ? ' ' : '!'); | |
1460 | } | |
1461 | if (was_dirty) { | |
1462 | /* we inc again because saved_bh gets decremented at free_cnode */ | |
1463 | get_bh(saved_bh); | |
1464 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state); | |
1465 | lock_buffer(saved_bh); | |
1466 | BUG_ON(cn->blocknr != saved_bh->b_blocknr); | |
1467 | if (buffer_dirty(saved_bh)) | |
1468 | submit_logged_buffer(saved_bh); | |
1469 | else | |
1470 | unlock_buffer(saved_bh); | |
1471 | count++; | |
1472 | } else { | |
45b03d5e JM |
1473 | reiserfs_warning(s, "clm-2082", |
1474 | "Unable to flush buffer %llu in %s", | |
bd4c625c | 1475 | (unsigned long long)saved_bh-> |
fbe5498b | 1476 | b_blocknr, __func__); |
bd4c625c LT |
1477 | } |
1478 | free_cnode: | |
1479 | last = cn; | |
1480 | cn = cn->next; | |
1481 | if (saved_bh) { | |
1482 | /* we incremented this to keep others from taking the buffer head away */ | |
1483 | put_bh(saved_bh); | |
1484 | if (atomic_read(&(saved_bh->b_count)) < 0) { | |
45b03d5e JM |
1485 | reiserfs_warning(s, "journal-945", |
1486 | "saved_bh->b_count < 0"); | |
bd4c625c LT |
1487 | } |
1488 | } | |
1489 | } | |
1490 | if (count > 0) { | |
1491 | cn = jl->j_realblock; | |
1492 | while (cn) { | |
1493 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { | |
1494 | if (!cn->bh) { | |
c3a9c210 JM |
1495 | reiserfs_panic(s, "journal-1011", |
1496 | "cn->bh is NULL"); | |
bd4c625c | 1497 | } |
8ebc4232 FW |
1498 | |
1499 | reiserfs_write_unlock(s); | |
bd4c625c | 1500 | wait_on_buffer(cn->bh); |
8ebc4232 FW |
1501 | reiserfs_write_lock(s); |
1502 | ||
bd4c625c | 1503 | if (!cn->bh) { |
c3a9c210 JM |
1504 | reiserfs_panic(s, "journal-1012", |
1505 | "cn->bh is NULL"); | |
bd4c625c LT |
1506 | } |
1507 | if (unlikely(!buffer_uptodate(cn->bh))) { | |
1508 | #ifdef CONFIG_REISERFS_CHECK | |
45b03d5e JM |
1509 | reiserfs_warning(s, "journal-949", |
1510 | "buffer write failed"); | |
bd4c625c LT |
1511 | #endif |
1512 | err = -EIO; | |
1513 | } | |
1514 | /* note, we must clear the JDirty_wait bit after the up to date | |
1515 | ** check, otherwise we race against our flushpage routine | |
1516 | */ | |
1517 | BUG_ON(!test_clear_buffer_journal_dirty | |
1518 | (cn->bh)); | |
1519 | ||
398c95bd | 1520 | /* drop one ref for us */ |
bd4c625c | 1521 | put_bh(cn->bh); |
398c95bd CM |
1522 | /* drop one ref for journal_mark_dirty */ |
1523 | release_buffer_page(cn->bh); | |
bd4c625c LT |
1524 | } |
1525 | cn = cn->next; | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | if (err) | |
1530 | reiserfs_abort(s, -EIO, | |
1531 | "Write error while pushing transaction to disk in %s", | |
fbe5498b | 1532 | __func__); |
bd4c625c LT |
1533 | flush_older_and_return: |
1534 | ||
0222e657 | 1535 | /* before we can update the journal header block, we _must_ flush all |
bd4c625c LT |
1536 | ** real blocks from all older transactions to disk. This is because |
1537 | ** once the header block is updated, this transaction will not be | |
1538 | ** replayed after a crash | |
1539 | */ | |
1540 | if (flushall) { | |
1541 | flush_older_journal_lists(s, jl); | |
1542 | } | |
1543 | ||
1544 | err = journal->j_errno; | |
0222e657 | 1545 | /* before we can remove everything from the hash tables for this |
bd4c625c LT |
1546 | ** transaction, we must make sure it can never be replayed |
1547 | ** | |
1548 | ** since we are only called from do_journal_end, we know for sure there | |
1549 | ** are no allocations going on while we are flushing journal lists. So, | |
1550 | ** we only need to update the journal header block for the last list | |
1551 | ** being flushed | |
1552 | */ | |
1553 | if (!err && flushall) { | |
1554 | err = | |
1555 | update_journal_header_block(s, | |
1556 | (jl->j_start + jl->j_len + | |
1557 | 2) % SB_ONDISK_JOURNAL_SIZE(s), | |
1558 | jl->j_trans_id); | |
1559 | if (err) | |
1560 | reiserfs_abort(s, -EIO, | |
1561 | "Write error while updating journal header in %s", | |
fbe5498b | 1562 | __func__); |
bd4c625c LT |
1563 | } |
1564 | remove_all_from_journal_list(s, jl, 0); | |
1565 | list_del_init(&jl->j_list); | |
1566 | journal->j_num_lists--; | |
1567 | del_from_work_list(s, jl); | |
1568 | ||
1569 | if (journal->j_last_flush_id != 0 && | |
1570 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { | |
45b03d5e | 1571 | reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", |
bd4c625c LT |
1572 | journal->j_last_flush_id, jl->j_trans_id); |
1573 | } | |
1574 | journal->j_last_flush_id = jl->j_trans_id; | |
1575 | ||
1576 | /* not strictly required since we are freeing the list, but it should | |
1577 | * help find code using dead lists later on | |
1578 | */ | |
1579 | jl->j_len = 0; | |
1580 | atomic_set(&(jl->j_nonzerolen), 0); | |
1581 | jl->j_start = 0; | |
1582 | jl->j_realblock = NULL; | |
1583 | jl->j_commit_bh = NULL; | |
1584 | jl->j_trans_id = 0; | |
1585 | jl->j_state = 0; | |
1586 | put_journal_list(s, jl); | |
1587 | if (flushall) | |
afe70259 | 1588 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1589 | return err; |
1590 | } | |
1591 | ||
a3172027 CM |
1592 | static int test_transaction(struct super_block *s, |
1593 | struct reiserfs_journal_list *jl) | |
1594 | { | |
1595 | struct reiserfs_journal_cnode *cn; | |
1596 | ||
1597 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) | |
1598 | return 1; | |
1599 | ||
1600 | cn = jl->j_realblock; | |
1601 | while (cn) { | |
1602 | /* if the blocknr == 0, this has been cleared from the hash, | |
1603 | ** skip it | |
1604 | */ | |
1605 | if (cn->blocknr == 0) { | |
1606 | goto next; | |
1607 | } | |
1608 | if (cn->bh && !newer_jl_done(cn)) | |
1609 | return 0; | |
1610 | next: | |
1611 | cn = cn->next; | |
1612 | cond_resched(); | |
1613 | } | |
1614 | return 0; | |
1615 | } | |
1616 | ||
bd4c625c LT |
1617 | static int write_one_transaction(struct super_block *s, |
1618 | struct reiserfs_journal_list *jl, | |
1619 | struct buffer_chunk *chunk) | |
1620 | { | |
1621 | struct reiserfs_journal_cnode *cn; | |
1622 | int ret = 0; | |
1623 | ||
1624 | jl->j_state |= LIST_TOUCHED; | |
1625 | del_from_work_list(s, jl); | |
1626 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { | |
1627 | return 0; | |
1628 | } | |
1629 | ||
1630 | cn = jl->j_realblock; | |
1631 | while (cn) { | |
1632 | /* if the blocknr == 0, this has been cleared from the hash, | |
1633 | ** skip it | |
1634 | */ | |
1635 | if (cn->blocknr == 0) { | |
1636 | goto next; | |
1637 | } | |
1638 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { | |
1639 | struct buffer_head *tmp_bh; | |
1640 | /* we can race against journal_mark_freed when we try | |
1641 | * to lock_buffer(cn->bh), so we have to inc the buffer | |
1642 | * count, and recheck things after locking | |
1643 | */ | |
1644 | tmp_bh = cn->bh; | |
1645 | get_bh(tmp_bh); | |
1646 | lock_buffer(tmp_bh); | |
1647 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { | |
1648 | if (!buffer_journal_dirty(tmp_bh) || | |
1649 | buffer_journal_prepared(tmp_bh)) | |
1650 | BUG(); | |
1651 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); | |
1652 | ret++; | |
1653 | } else { | |
1654 | /* note, cn->bh might be null now */ | |
1655 | unlock_buffer(tmp_bh); | |
1656 | } | |
1657 | put_bh(tmp_bh); | |
1658 | } | |
1659 | next: | |
1660 | cn = cn->next; | |
1661 | cond_resched(); | |
1662 | } | |
1663 | return ret; | |
1664 | } | |
1665 | ||
1666 | /* used by flush_commit_list */ | |
1667 | static int dirty_one_transaction(struct super_block *s, | |
1668 | struct reiserfs_journal_list *jl) | |
1669 | { | |
1670 | struct reiserfs_journal_cnode *cn; | |
1671 | struct reiserfs_journal_list *pjl; | |
1672 | int ret = 0; | |
1673 | ||
1674 | jl->j_state |= LIST_DIRTY; | |
1675 | cn = jl->j_realblock; | |
1676 | while (cn) { | |
1677 | /* look for a more recent transaction that logged this | |
1678 | ** buffer. Only the most recent transaction with a buffer in | |
1679 | ** it is allowed to send that buffer to disk | |
1680 | */ | |
1681 | pjl = find_newer_jl_for_cn(cn); | |
1682 | if (!pjl && cn->blocknr && cn->bh | |
1683 | && buffer_journal_dirty(cn->bh)) { | |
1684 | BUG_ON(!can_dirty(cn)); | |
1685 | /* if the buffer is prepared, it will either be logged | |
1686 | * or restored. If restored, we need to make sure | |
1687 | * it actually gets marked dirty | |
1688 | */ | |
1689 | clear_buffer_journal_new(cn->bh); | |
1690 | if (buffer_journal_prepared(cn->bh)) { | |
1691 | set_buffer_journal_restore_dirty(cn->bh); | |
1692 | } else { | |
1693 | set_buffer_journal_test(cn->bh); | |
1694 | mark_buffer_dirty(cn->bh); | |
1695 | } | |
1696 | } | |
1697 | cn = cn->next; | |
1698 | } | |
1699 | return ret; | |
1700 | } | |
1701 | ||
1702 | static int kupdate_transactions(struct super_block *s, | |
1703 | struct reiserfs_journal_list *jl, | |
1704 | struct reiserfs_journal_list **next_jl, | |
600ed416 | 1705 | unsigned int *next_trans_id, |
bd4c625c LT |
1706 | int num_blocks, int num_trans) |
1707 | { | |
1708 | int ret = 0; | |
1709 | int written = 0; | |
1710 | int transactions_flushed = 0; | |
600ed416 | 1711 | unsigned int orig_trans_id = jl->j_trans_id; |
bd4c625c LT |
1712 | struct buffer_chunk chunk; |
1713 | struct list_head *entry; | |
1714 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1715 | chunk.nr = 0; | |
1716 | ||
a412f9ef | 1717 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
bd4c625c LT |
1718 | if (!journal_list_still_alive(s, orig_trans_id)) { |
1719 | goto done; | |
1720 | } | |
1721 | ||
afe70259 | 1722 | /* we've got j_flush_mutex held, nobody is going to delete any |
bd4c625c LT |
1723 | * of these lists out from underneath us |
1724 | */ | |
1725 | while ((num_trans && transactions_flushed < num_trans) || | |
1726 | (!num_trans && written < num_blocks)) { | |
1727 | ||
1728 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || | |
1729 | atomic_read(&jl->j_commit_left) | |
1730 | || !(jl->j_state & LIST_DIRTY)) { | |
1731 | del_from_work_list(s, jl); | |
1732 | break; | |
1733 | } | |
1734 | ret = write_one_transaction(s, jl, &chunk); | |
1735 | ||
1736 | if (ret < 0) | |
1737 | goto done; | |
1738 | transactions_flushed++; | |
1739 | written += ret; | |
1740 | entry = jl->j_list.next; | |
1741 | ||
1742 | /* did we wrap? */ | |
1743 | if (entry == &journal->j_journal_list) { | |
1744 | break; | |
1745 | } | |
1746 | jl = JOURNAL_LIST_ENTRY(entry); | |
1747 | ||
1748 | /* don't bother with older transactions */ | |
1749 | if (jl->j_trans_id <= orig_trans_id) | |
1750 | break; | |
1751 | } | |
1752 | if (chunk.nr) { | |
1753 | write_chunk(&chunk); | |
1754 | } | |
1755 | ||
1756 | done: | |
afe70259 | 1757 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1758 | return ret; |
1759 | } | |
1760 | ||
1761 | /* for o_sync and fsync heavy applications, they tend to use | |
1762 | ** all the journa list slots with tiny transactions. These | |
1763 | ** trigger lots and lots of calls to update the header block, which | |
1764 | ** adds seeks and slows things down. | |
1765 | ** | |
1766 | ** This function tries to clear out a large chunk of the journal lists | |
1767 | ** at once, which makes everything faster since only the newest journal | |
1da177e4 LT |
1768 | ** list updates the header block |
1769 | */ | |
1770 | static int flush_used_journal_lists(struct super_block *s, | |
bd4c625c LT |
1771 | struct reiserfs_journal_list *jl) |
1772 | { | |
1773 | unsigned long len = 0; | |
1774 | unsigned long cur_len; | |
1775 | int ret; | |
1776 | int i; | |
1777 | int limit = 256; | |
1778 | struct reiserfs_journal_list *tjl; | |
1779 | struct reiserfs_journal_list *flush_jl; | |
600ed416 | 1780 | unsigned int trans_id; |
bd4c625c LT |
1781 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1782 | ||
1783 | flush_jl = tjl = jl; | |
1784 | ||
1785 | /* in data logging mode, try harder to flush a lot of blocks */ | |
1786 | if (reiserfs_data_log(s)) | |
1787 | limit = 1024; | |
1788 | /* flush for 256 transactions or limit blocks, whichever comes first */ | |
1789 | for (i = 0; i < 256 && len < limit; i++) { | |
1790 | if (atomic_read(&tjl->j_commit_left) || | |
1791 | tjl->j_trans_id < jl->j_trans_id) { | |
1792 | break; | |
1793 | } | |
1794 | cur_len = atomic_read(&tjl->j_nonzerolen); | |
1795 | if (cur_len > 0) { | |
1796 | tjl->j_state &= ~LIST_TOUCHED; | |
1797 | } | |
1798 | len += cur_len; | |
1799 | flush_jl = tjl; | |
1800 | if (tjl->j_list.next == &journal->j_journal_list) | |
1801 | break; | |
1802 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); | |
1803 | } | |
1804 | /* try to find a group of blocks we can flush across all the | |
1805 | ** transactions, but only bother if we've actually spanned | |
1806 | ** across multiple lists | |
1807 | */ | |
1808 | if (flush_jl != jl) { | |
1809 | ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); | |
1810 | } | |
1811 | flush_journal_list(s, flush_jl, 1); | |
1812 | return 0; | |
1da177e4 LT |
1813 | } |
1814 | ||
1815 | /* | |
1816 | ** removes any nodes in table with name block and dev as bh. | |
1817 | ** only touchs the hnext and hprev pointers. | |
1818 | */ | |
1819 | void remove_journal_hash(struct super_block *sb, | |
bd4c625c LT |
1820 | struct reiserfs_journal_cnode **table, |
1821 | struct reiserfs_journal_list *jl, | |
1822 | unsigned long block, int remove_freed) | |
1823 | { | |
1824 | struct reiserfs_journal_cnode *cur; | |
1825 | struct reiserfs_journal_cnode **head; | |
1826 | ||
1827 | head = &(journal_hash(table, sb, block)); | |
1828 | if (!head) { | |
1829 | return; | |
1830 | } | |
1831 | cur = *head; | |
1832 | while (cur) { | |
1833 | if (cur->blocknr == block && cur->sb == sb | |
1834 | && (jl == NULL || jl == cur->jlist) | |
1835 | && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { | |
1836 | if (cur->hnext) { | |
1837 | cur->hnext->hprev = cur->hprev; | |
1838 | } | |
1839 | if (cur->hprev) { | |
1840 | cur->hprev->hnext = cur->hnext; | |
1841 | } else { | |
1842 | *head = cur->hnext; | |
1843 | } | |
1844 | cur->blocknr = 0; | |
1845 | cur->sb = NULL; | |
1846 | cur->state = 0; | |
1847 | if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ | |
1848 | atomic_dec(&(cur->jlist->j_nonzerolen)); | |
1849 | cur->bh = NULL; | |
1850 | cur->jlist = NULL; | |
1851 | } | |
1852 | cur = cur->hnext; | |
1853 | } | |
1854 | } | |
1855 | ||
a9dd3643 | 1856 | static void free_journal_ram(struct super_block *sb) |
bd4c625c | 1857 | { |
a9dd3643 | 1858 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
d739b42b | 1859 | kfree(journal->j_current_jl); |
bd4c625c LT |
1860 | journal->j_num_lists--; |
1861 | ||
1862 | vfree(journal->j_cnode_free_orig); | |
a9dd3643 JM |
1863 | free_list_bitmaps(sb, journal->j_list_bitmap); |
1864 | free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ | |
bd4c625c LT |
1865 | if (journal->j_header_bh) { |
1866 | brelse(journal->j_header_bh); | |
1867 | } | |
1868 | /* j_header_bh is on the journal dev, make sure not to release the journal | |
1869 | * dev until we brelse j_header_bh | |
1870 | */ | |
a9dd3643 | 1871 | release_journal_dev(sb, journal); |
bd4c625c | 1872 | vfree(journal); |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | /* | |
1876 | ** call on unmount. Only set error to 1 if you haven't made your way out | |
1877 | ** of read_super() yet. Any other caller must keep error at 0. | |
1878 | */ | |
bd4c625c | 1879 | static int do_journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1880 | struct super_block *sb, int error) |
bd4c625c LT |
1881 | { |
1882 | struct reiserfs_transaction_handle myth; | |
1883 | int flushed = 0; | |
a9dd3643 | 1884 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1885 | |
1886 | /* we only want to flush out transactions if we were called with error == 0 | |
1887 | */ | |
a9dd3643 | 1888 | if (!error && !(sb->s_flags & MS_RDONLY)) { |
bd4c625c LT |
1889 | /* end the current trans */ |
1890 | BUG_ON(!th->t_trans_id); | |
a9dd3643 | 1891 | do_journal_end(th, sb, 10, FLUSH_ALL); |
bd4c625c LT |
1892 | |
1893 | /* make sure something gets logged to force our way into the flush code */ | |
a9dd3643 JM |
1894 | if (!journal_join(&myth, sb, 1)) { |
1895 | reiserfs_prepare_for_journal(sb, | |
1896 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1897 | 1); |
a9dd3643 JM |
1898 | journal_mark_dirty(&myth, sb, |
1899 | SB_BUFFER_WITH_SB(sb)); | |
1900 | do_journal_end(&myth, sb, 1, FLUSH_ALL); | |
bd4c625c LT |
1901 | flushed = 1; |
1902 | } | |
1903 | } | |
1904 | ||
1905 | /* this also catches errors during the do_journal_end above */ | |
1906 | if (!error && reiserfs_is_journal_aborted(journal)) { | |
1907 | memset(&myth, 0, sizeof(myth)); | |
a9dd3643 JM |
1908 | if (!journal_join_abort(&myth, sb, 1)) { |
1909 | reiserfs_prepare_for_journal(sb, | |
1910 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1911 | 1); |
a9dd3643 JM |
1912 | journal_mark_dirty(&myth, sb, |
1913 | SB_BUFFER_WITH_SB(sb)); | |
1914 | do_journal_end(&myth, sb, 1, FLUSH_ALL); | |
bd4c625c LT |
1915 | } |
1916 | } | |
1917 | ||
1918 | reiserfs_mounted_fs_count--; | |
1919 | /* wait for all commits to finish */ | |
a9dd3643 | 1920 | cancel_delayed_work(&SB_JOURNAL(sb)->j_work); |
8ebc4232 FW |
1921 | |
1922 | /* | |
1923 | * We must release the write lock here because | |
1924 | * the workqueue job (flush_async_commit) needs this lock | |
1925 | */ | |
1926 | reiserfs_write_unlock(sb); | |
bd4c625c | 1927 | flush_workqueue(commit_wq); |
8ebc4232 | 1928 | |
bd4c625c LT |
1929 | if (!reiserfs_mounted_fs_count) { |
1930 | destroy_workqueue(commit_wq); | |
1931 | commit_wq = NULL; | |
1932 | } | |
1933 | ||
a9dd3643 | 1934 | free_journal_ram(sb); |
bd4c625c | 1935 | |
0523676d FW |
1936 | reiserfs_write_lock(sb); |
1937 | ||
bd4c625c | 1938 | return 0; |
1da177e4 LT |
1939 | } |
1940 | ||
1941 | /* | |
1942 | ** call on unmount. flush all journal trans, release all alloc'd ram | |
1943 | */ | |
bd4c625c | 1944 | int journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1945 | struct super_block *sb) |
bd4c625c | 1946 | { |
a9dd3643 | 1947 | return do_journal_release(th, sb, 0); |
1da177e4 | 1948 | } |
bd4c625c | 1949 | |
1da177e4 LT |
1950 | /* |
1951 | ** only call from an error condition inside reiserfs_read_super! | |
1952 | */ | |
bd4c625c | 1953 | int journal_release_error(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1954 | struct super_block *sb) |
bd4c625c | 1955 | { |
a9dd3643 | 1956 | return do_journal_release(th, sb, 1); |
1da177e4 LT |
1957 | } |
1958 | ||
1959 | /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ | |
a9dd3643 | 1960 | static int journal_compare_desc_commit(struct super_block *sb, |
bd4c625c LT |
1961 | struct reiserfs_journal_desc *desc, |
1962 | struct reiserfs_journal_commit *commit) | |
1963 | { | |
1964 | if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || | |
1965 | get_commit_trans_len(commit) != get_desc_trans_len(desc) || | |
a9dd3643 | 1966 | get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || |
bd4c625c LT |
1967 | get_commit_trans_len(commit) <= 0) { |
1968 | return 1; | |
1969 | } | |
1970 | return 0; | |
1da177e4 | 1971 | } |
bd4c625c | 1972 | |
0222e657 | 1973 | /* returns 0 if it did not find a description block |
1da177e4 | 1974 | ** returns -1 if it found a corrupt commit block |
0222e657 | 1975 | ** returns 1 if both desc and commit were valid |
1da177e4 | 1976 | */ |
a9dd3643 | 1977 | static int journal_transaction_is_valid(struct super_block *sb, |
bd4c625c | 1978 | struct buffer_head *d_bh, |
600ed416 | 1979 | unsigned int *oldest_invalid_trans_id, |
bd4c625c LT |
1980 | unsigned long *newest_mount_id) |
1981 | { | |
1982 | struct reiserfs_journal_desc *desc; | |
1983 | struct reiserfs_journal_commit *commit; | |
1984 | struct buffer_head *c_bh; | |
1985 | unsigned long offset; | |
1986 | ||
1987 | if (!d_bh) | |
1988 | return 0; | |
1989 | ||
1990 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
1991 | if (get_desc_trans_len(desc) > 0 | |
1992 | && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { | |
1993 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id | |
1994 | && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { | |
a9dd3643 | 1995 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
1996 | "journal-986: transaction " |
1997 | "is valid returning because trans_id %d is greater than " | |
1998 | "oldest_invalid %lu", | |
1999 | get_desc_trans_id(desc), | |
2000 | *oldest_invalid_trans_id); | |
2001 | return 0; | |
2002 | } | |
2003 | if (newest_mount_id | |
2004 | && *newest_mount_id > get_desc_mount_id(desc)) { | |
a9dd3643 | 2005 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2006 | "journal-1087: transaction " |
2007 | "is valid returning because mount_id %d is less than " | |
2008 | "newest_mount_id %lu", | |
2009 | get_desc_mount_id(desc), | |
2010 | *newest_mount_id); | |
2011 | return -1; | |
2012 | } | |
a9dd3643 JM |
2013 | if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { |
2014 | reiserfs_warning(sb, "journal-2018", | |
45b03d5e JM |
2015 | "Bad transaction length %d " |
2016 | "encountered, ignoring transaction", | |
bd4c625c LT |
2017 | get_desc_trans_len(desc)); |
2018 | return -1; | |
2019 | } | |
a9dd3643 | 2020 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2021 | |
2022 | /* ok, we have a journal description block, lets see if the transaction was valid */ | |
2023 | c_bh = | |
a9dd3643 JM |
2024 | journal_bread(sb, |
2025 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2026 | ((offset + get_desc_trans_len(desc) + |
a9dd3643 | 2027 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2028 | if (!c_bh) |
2029 | return 0; | |
2030 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2031 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2032 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2033 | "journal_transaction_is_valid, commit offset %ld had bad " |
2034 | "time %d or length %d", | |
2035 | c_bh->b_blocknr - | |
a9dd3643 | 2036 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2037 | get_commit_trans_id(commit), |
2038 | get_commit_trans_len(commit)); | |
2039 | brelse(c_bh); | |
2040 | if (oldest_invalid_trans_id) { | |
2041 | *oldest_invalid_trans_id = | |
2042 | get_desc_trans_id(desc); | |
a9dd3643 | 2043 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2044 | "journal-1004: " |
2045 | "transaction_is_valid setting oldest invalid trans_id " | |
2046 | "to %d", | |
2047 | get_desc_trans_id(desc)); | |
2048 | } | |
2049 | return -1; | |
2050 | } | |
2051 | brelse(c_bh); | |
a9dd3643 | 2052 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2053 | "journal-1006: found valid " |
2054 | "transaction start offset %llu, len %d id %d", | |
2055 | d_bh->b_blocknr - | |
a9dd3643 | 2056 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2057 | get_desc_trans_len(desc), |
2058 | get_desc_trans_id(desc)); | |
2059 | return 1; | |
2060 | } else { | |
2061 | return 0; | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | static void brelse_array(struct buffer_head **heads, int num) | |
2066 | { | |
2067 | int i; | |
2068 | for (i = 0; i < num; i++) { | |
2069 | brelse(heads[i]); | |
2070 | } | |
1da177e4 LT |
2071 | } |
2072 | ||
2073 | /* | |
2074 | ** given the start, and values for the oldest acceptable transactions, | |
2075 | ** this either reads in a replays a transaction, or returns because the transaction | |
2076 | ** is invalid, or too old. | |
2077 | */ | |
a9dd3643 | 2078 | static int journal_read_transaction(struct super_block *sb, |
bd4c625c LT |
2079 | unsigned long cur_dblock, |
2080 | unsigned long oldest_start, | |
600ed416 | 2081 | unsigned int oldest_trans_id, |
bd4c625c LT |
2082 | unsigned long newest_mount_id) |
2083 | { | |
a9dd3643 | 2084 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
2085 | struct reiserfs_journal_desc *desc; |
2086 | struct reiserfs_journal_commit *commit; | |
600ed416 | 2087 | unsigned int trans_id = 0; |
bd4c625c LT |
2088 | struct buffer_head *c_bh; |
2089 | struct buffer_head *d_bh; | |
2090 | struct buffer_head **log_blocks = NULL; | |
2091 | struct buffer_head **real_blocks = NULL; | |
600ed416 | 2092 | unsigned int trans_offset; |
bd4c625c LT |
2093 | int i; |
2094 | int trans_half; | |
2095 | ||
a9dd3643 | 2096 | d_bh = journal_bread(sb, cur_dblock); |
bd4c625c LT |
2097 | if (!d_bh) |
2098 | return 1; | |
2099 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
a9dd3643 JM |
2100 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2101 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " | |
bd4c625c | 2102 | "journal_read_transaction, offset %llu, len %d mount_id %d", |
a9dd3643 | 2103 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2104 | get_desc_trans_len(desc), get_desc_mount_id(desc)); |
2105 | if (get_desc_trans_id(desc) < oldest_trans_id) { | |
a9dd3643 | 2106 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " |
bd4c625c LT |
2107 | "journal_read_trans skipping because %lu is too old", |
2108 | cur_dblock - | |
a9dd3643 | 2109 | SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2110 | brelse(d_bh); |
2111 | return 1; | |
2112 | } | |
2113 | if (get_desc_mount_id(desc) != newest_mount_id) { | |
a9dd3643 | 2114 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " |
bd4c625c LT |
2115 | "journal_read_trans skipping because %d is != " |
2116 | "newest_mount_id %lu", get_desc_mount_id(desc), | |
2117 | newest_mount_id); | |
2118 | brelse(d_bh); | |
2119 | return 1; | |
2120 | } | |
a9dd3643 | 2121 | c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2122 | ((trans_offset + get_desc_trans_len(desc) + 1) % |
a9dd3643 | 2123 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2124 | if (!c_bh) { |
2125 | brelse(d_bh); | |
2126 | return 1; | |
2127 | } | |
2128 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2129 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2130 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2131 | "journal_read_transaction, " |
2132 | "commit offset %llu had bad time %d or length %d", | |
2133 | c_bh->b_blocknr - | |
a9dd3643 | 2134 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2135 | get_commit_trans_id(commit), |
2136 | get_commit_trans_len(commit)); | |
2137 | brelse(c_bh); | |
2138 | brelse(d_bh); | |
2139 | return 1; | |
2140 | } | |
3f8b5ee3 JM |
2141 | |
2142 | if (bdev_read_only(sb->s_bdev)) { | |
2143 | reiserfs_warning(sb, "clm-2076", | |
2144 | "device is readonly, unable to replay log"); | |
2145 | brelse(c_bh); | |
2146 | brelse(d_bh); | |
2147 | return -EROFS; | |
2148 | } | |
2149 | ||
bd4c625c LT |
2150 | trans_id = get_desc_trans_id(desc); |
2151 | /* now we know we've got a good transaction, and it was inside the valid time ranges */ | |
d739b42b PE |
2152 | log_blocks = kmalloc(get_desc_trans_len(desc) * |
2153 | sizeof(struct buffer_head *), GFP_NOFS); | |
2154 | real_blocks = kmalloc(get_desc_trans_len(desc) * | |
2155 | sizeof(struct buffer_head *), GFP_NOFS); | |
bd4c625c LT |
2156 | if (!log_blocks || !real_blocks) { |
2157 | brelse(c_bh); | |
2158 | brelse(d_bh); | |
d739b42b PE |
2159 | kfree(log_blocks); |
2160 | kfree(real_blocks); | |
a9dd3643 | 2161 | reiserfs_warning(sb, "journal-1169", |
45b03d5e | 2162 | "kmalloc failed, unable to mount FS"); |
bd4c625c LT |
2163 | return -1; |
2164 | } | |
2165 | /* get all the buffer heads */ | |
a9dd3643 | 2166 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
2167 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
2168 | log_blocks[i] = | |
a9dd3643 JM |
2169 | journal_getblk(sb, |
2170 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2171 | (trans_offset + 1 + |
a9dd3643 | 2172 | i) % SB_ONDISK_JOURNAL_SIZE(sb)); |
bd4c625c LT |
2173 | if (i < trans_half) { |
2174 | real_blocks[i] = | |
a9dd3643 | 2175 | sb_getblk(sb, |
bd4c625c LT |
2176 | le32_to_cpu(desc->j_realblock[i])); |
2177 | } else { | |
2178 | real_blocks[i] = | |
a9dd3643 | 2179 | sb_getblk(sb, |
bd4c625c LT |
2180 | le32_to_cpu(commit-> |
2181 | j_realblock[i - trans_half])); | |
2182 | } | |
a9dd3643 JM |
2183 | if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { |
2184 | reiserfs_warning(sb, "journal-1207", | |
45b03d5e JM |
2185 | "REPLAY FAILURE fsck required! " |
2186 | "Block to replay is outside of " | |
2187 | "filesystem"); | |
bd4c625c LT |
2188 | goto abort_replay; |
2189 | } | |
2190 | /* make sure we don't try to replay onto log or reserved area */ | |
2191 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
2192 | (sb, real_blocks[i]->b_blocknr)) { |
2193 | reiserfs_warning(sb, "journal-1204", | |
45b03d5e JM |
2194 | "REPLAY FAILURE fsck required! " |
2195 | "Trying to replay onto a log block"); | |
bd4c625c LT |
2196 | abort_replay: |
2197 | brelse_array(log_blocks, i); | |
2198 | brelse_array(real_blocks, i); | |
2199 | brelse(c_bh); | |
2200 | brelse(d_bh); | |
d739b42b PE |
2201 | kfree(log_blocks); |
2202 | kfree(real_blocks); | |
bd4c625c LT |
2203 | return -1; |
2204 | } | |
2205 | } | |
2206 | /* read in the log blocks, memcpy to the corresponding real block */ | |
2207 | ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); | |
2208 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
8ebc4232 FW |
2209 | |
2210 | reiserfs_write_unlock(sb); | |
bd4c625c | 2211 | wait_on_buffer(log_blocks[i]); |
8ebc4232 FW |
2212 | reiserfs_write_lock(sb); |
2213 | ||
bd4c625c | 2214 | if (!buffer_uptodate(log_blocks[i])) { |
a9dd3643 | 2215 | reiserfs_warning(sb, "journal-1212", |
45b03d5e JM |
2216 | "REPLAY FAILURE fsck required! " |
2217 | "buffer write failed"); | |
bd4c625c LT |
2218 | brelse_array(log_blocks + i, |
2219 | get_desc_trans_len(desc) - i); | |
2220 | brelse_array(real_blocks, get_desc_trans_len(desc)); | |
2221 | brelse(c_bh); | |
2222 | brelse(d_bh); | |
d739b42b PE |
2223 | kfree(log_blocks); |
2224 | kfree(real_blocks); | |
bd4c625c LT |
2225 | return -1; |
2226 | } | |
2227 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, | |
2228 | real_blocks[i]->b_size); | |
2229 | set_buffer_uptodate(real_blocks[i]); | |
2230 | brelse(log_blocks[i]); | |
2231 | } | |
2232 | /* flush out the real blocks */ | |
2233 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2234 | set_buffer_dirty(real_blocks[i]); | |
9cb569d6 | 2235 | write_dirty_buffer(real_blocks[i], WRITE); |
bd4c625c LT |
2236 | } |
2237 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2238 | wait_on_buffer(real_blocks[i]); | |
2239 | if (!buffer_uptodate(real_blocks[i])) { | |
a9dd3643 | 2240 | reiserfs_warning(sb, "journal-1226", |
45b03d5e JM |
2241 | "REPLAY FAILURE, fsck required! " |
2242 | "buffer write failed"); | |
bd4c625c LT |
2243 | brelse_array(real_blocks + i, |
2244 | get_desc_trans_len(desc) - i); | |
2245 | brelse(c_bh); | |
2246 | brelse(d_bh); | |
d739b42b PE |
2247 | kfree(log_blocks); |
2248 | kfree(real_blocks); | |
bd4c625c LT |
2249 | return -1; |
2250 | } | |
2251 | brelse(real_blocks[i]); | |
2252 | } | |
2253 | cur_dblock = | |
a9dd3643 | 2254 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2255 | ((trans_offset + get_desc_trans_len(desc) + |
a9dd3643 JM |
2256 | 2) % SB_ONDISK_JOURNAL_SIZE(sb)); |
2257 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c | 2258 | "journal-1095: setting journal " "start to offset %ld", |
a9dd3643 | 2259 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2260 | |
2261 | /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ | |
a9dd3643 | 2262 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2263 | journal->j_last_flush_trans_id = trans_id; |
2264 | journal->j_trans_id = trans_id + 1; | |
a44c94a7 AZ |
2265 | /* check for trans_id overflow */ |
2266 | if (journal->j_trans_id == 0) | |
2267 | journal->j_trans_id = 10; | |
bd4c625c LT |
2268 | brelse(c_bh); |
2269 | brelse(d_bh); | |
d739b42b PE |
2270 | kfree(log_blocks); |
2271 | kfree(real_blocks); | |
bd4c625c | 2272 | return 0; |
1da177e4 LT |
2273 | } |
2274 | ||
2275 | /* This function reads blocks starting from block and to max_block of bufsize | |
2276 | size (but no more than BUFNR blocks at a time). This proved to improve | |
2277 | mounting speed on self-rebuilding raid5 arrays at least. | |
2278 | Right now it is only used from journal code. But later we might use it | |
2279 | from other places. | |
2280 | Note: Do not use journal_getblk/sb_getblk functions here! */ | |
3ee16670 JM |
2281 | static struct buffer_head *reiserfs_breada(struct block_device *dev, |
2282 | b_blocknr_t block, int bufsize, | |
2283 | b_blocknr_t max_block) | |
1da177e4 | 2284 | { |
bd4c625c | 2285 | struct buffer_head *bhlist[BUFNR]; |
1da177e4 | 2286 | unsigned int blocks = BUFNR; |
bd4c625c | 2287 | struct buffer_head *bh; |
1da177e4 | 2288 | int i, j; |
bd4c625c LT |
2289 | |
2290 | bh = __getblk(dev, block, bufsize); | |
2291 | if (buffer_uptodate(bh)) | |
2292 | return (bh); | |
2293 | ||
1da177e4 LT |
2294 | if (block + BUFNR > max_block) { |
2295 | blocks = max_block - block; | |
2296 | } | |
2297 | bhlist[0] = bh; | |
2298 | j = 1; | |
2299 | for (i = 1; i < blocks; i++) { | |
bd4c625c LT |
2300 | bh = __getblk(dev, block + i, bufsize); |
2301 | if (buffer_uptodate(bh)) { | |
2302 | brelse(bh); | |
1da177e4 | 2303 | break; |
bd4c625c LT |
2304 | } else |
2305 | bhlist[j++] = bh; | |
1da177e4 | 2306 | } |
bd4c625c LT |
2307 | ll_rw_block(READ, j, bhlist); |
2308 | for (i = 1; i < j; i++) | |
2309 | brelse(bhlist[i]); | |
1da177e4 | 2310 | bh = bhlist[0]; |
bd4c625c LT |
2311 | wait_on_buffer(bh); |
2312 | if (buffer_uptodate(bh)) | |
1da177e4 | 2313 | return bh; |
bd4c625c | 2314 | brelse(bh); |
1da177e4 LT |
2315 | return NULL; |
2316 | } | |
2317 | ||
2318 | /* | |
2319 | ** read and replay the log | |
2320 | ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid | |
2321 | ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. | |
2322 | ** | |
2323 | ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. | |
2324 | ** | |
2325 | ** On exit, it sets things up so the first transaction will work correctly. | |
2326 | */ | |
a9dd3643 | 2327 | static int journal_read(struct super_block *sb) |
bd4c625c | 2328 | { |
a9dd3643 | 2329 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 2330 | struct reiserfs_journal_desc *desc; |
600ed416 JM |
2331 | unsigned int oldest_trans_id = 0; |
2332 | unsigned int oldest_invalid_trans_id = 0; | |
bd4c625c LT |
2333 | time_t start; |
2334 | unsigned long oldest_start = 0; | |
2335 | unsigned long cur_dblock = 0; | |
2336 | unsigned long newest_mount_id = 9; | |
2337 | struct buffer_head *d_bh; | |
2338 | struct reiserfs_journal_header *jh; | |
2339 | int valid_journal_header = 0; | |
2340 | int replay_count = 0; | |
2341 | int continue_replay = 1; | |
2342 | int ret; | |
2343 | char b[BDEVNAME_SIZE]; | |
2344 | ||
a9dd3643 JM |
2345 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2346 | reiserfs_info(sb, "checking transaction log (%s)\n", | |
bd4c625c LT |
2347 | bdevname(journal->j_dev_bd, b)); |
2348 | start = get_seconds(); | |
2349 | ||
0222e657 JM |
2350 | /* step 1, read in the journal header block. Check the transaction it says |
2351 | ** is the first unflushed, and if that transaction is not valid, | |
bd4c625c LT |
2352 | ** replay is done |
2353 | */ | |
a9dd3643 JM |
2354 | journal->j_header_bh = journal_bread(sb, |
2355 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) | |
2356 | + SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c LT |
2357 | if (!journal->j_header_bh) { |
2358 | return 1; | |
2359 | } | |
2360 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); | |
c499ec24 | 2361 | if (le32_to_cpu(jh->j_first_unflushed_offset) < |
a9dd3643 | 2362 | SB_ONDISK_JOURNAL_SIZE(sb) |
bd4c625c LT |
2363 | && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { |
2364 | oldest_start = | |
a9dd3643 | 2365 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c LT |
2366 | le32_to_cpu(jh->j_first_unflushed_offset); |
2367 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2368 | newest_mount_id = le32_to_cpu(jh->j_mount_id); | |
a9dd3643 | 2369 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2370 | "journal-1153: found in " |
2371 | "header: first_unflushed_offset %d, last_flushed_trans_id " | |
2372 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), | |
2373 | le32_to_cpu(jh->j_last_flush_trans_id)); | |
2374 | valid_journal_header = 1; | |
2375 | ||
0222e657 JM |
2376 | /* now, we try to read the first unflushed offset. If it is not valid, |
2377 | ** there is nothing more we can do, and it makes no sense to read | |
bd4c625c LT |
2378 | ** through the whole log. |
2379 | */ | |
2380 | d_bh = | |
a9dd3643 JM |
2381 | journal_bread(sb, |
2382 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2383 | le32_to_cpu(jh->j_first_unflushed_offset)); |
a9dd3643 | 2384 | ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); |
bd4c625c LT |
2385 | if (!ret) { |
2386 | continue_replay = 0; | |
2387 | } | |
2388 | brelse(d_bh); | |
2389 | goto start_log_replay; | |
2390 | } | |
2391 | ||
bd4c625c LT |
2392 | /* ok, there are transactions that need to be replayed. start with the first log block, find |
2393 | ** all the valid transactions, and pick out the oldest. | |
2394 | */ | |
2395 | while (continue_replay | |
2396 | && cur_dblock < | |
a9dd3643 JM |
2397 | (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
2398 | SB_ONDISK_JOURNAL_SIZE(sb))) { | |
bd4c625c LT |
2399 | /* Note that it is required for blocksize of primary fs device and journal |
2400 | device to be the same */ | |
2401 | d_bh = | |
2402 | reiserfs_breada(journal->j_dev_bd, cur_dblock, | |
a9dd3643 JM |
2403 | sb->s_blocksize, |
2404 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2405 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2406 | ret = |
a9dd3643 | 2407 | journal_transaction_is_valid(sb, d_bh, |
bd4c625c LT |
2408 | &oldest_invalid_trans_id, |
2409 | &newest_mount_id); | |
2410 | if (ret == 1) { | |
2411 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2412 | if (oldest_start == 0) { /* init all oldest_ values */ | |
2413 | oldest_trans_id = get_desc_trans_id(desc); | |
2414 | oldest_start = d_bh->b_blocknr; | |
2415 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2416 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2417 | "journal-1179: Setting " |
2418 | "oldest_start to offset %llu, trans_id %lu", | |
2419 | oldest_start - | |
2420 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2421 | (sb), oldest_trans_id); |
bd4c625c LT |
2422 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { |
2423 | /* one we just read was older */ | |
2424 | oldest_trans_id = get_desc_trans_id(desc); | |
2425 | oldest_start = d_bh->b_blocknr; | |
a9dd3643 | 2426 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2427 | "journal-1180: Resetting " |
2428 | "oldest_start to offset %lu, trans_id %lu", | |
2429 | oldest_start - | |
2430 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2431 | (sb), oldest_trans_id); |
bd4c625c LT |
2432 | } |
2433 | if (newest_mount_id < get_desc_mount_id(desc)) { | |
2434 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2435 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2436 | "journal-1299: Setting " |
2437 | "newest_mount_id to %d", | |
2438 | get_desc_mount_id(desc)); | |
2439 | } | |
2440 | cur_dblock += get_desc_trans_len(desc) + 2; | |
2441 | } else { | |
2442 | cur_dblock++; | |
2443 | } | |
2444 | brelse(d_bh); | |
2445 | } | |
2446 | ||
2447 | start_log_replay: | |
2448 | cur_dblock = oldest_start; | |
2449 | if (oldest_trans_id) { | |
a9dd3643 | 2450 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2451 | "journal-1206: Starting replay " |
2452 | "from offset %llu, trans_id %lu", | |
a9dd3643 | 2453 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2454 | oldest_trans_id); |
2455 | ||
2456 | } | |
2457 | replay_count = 0; | |
2458 | while (continue_replay && oldest_trans_id > 0) { | |
2459 | ret = | |
a9dd3643 | 2460 | journal_read_transaction(sb, cur_dblock, oldest_start, |
bd4c625c LT |
2461 | oldest_trans_id, newest_mount_id); |
2462 | if (ret < 0) { | |
2463 | return ret; | |
2464 | } else if (ret != 0) { | |
2465 | break; | |
2466 | } | |
2467 | cur_dblock = | |
a9dd3643 | 2468 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; |
bd4c625c LT |
2469 | replay_count++; |
2470 | if (cur_dblock == oldest_start) | |
2471 | break; | |
2472 | } | |
2473 | ||
2474 | if (oldest_trans_id == 0) { | |
a9dd3643 | 2475 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2476 | "journal-1225: No valid " "transactions found"); |
2477 | } | |
2478 | /* j_start does not get set correctly if we don't replay any transactions. | |
2479 | ** if we had a valid journal_header, set j_start to the first unflushed transaction value, | |
2480 | ** copy the trans_id from the header | |
2481 | */ | |
2482 | if (valid_journal_header && replay_count == 0) { | |
2483 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); | |
2484 | journal->j_trans_id = | |
2485 | le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
a44c94a7 AZ |
2486 | /* check for trans_id overflow */ |
2487 | if (journal->j_trans_id == 0) | |
2488 | journal->j_trans_id = 10; | |
bd4c625c LT |
2489 | journal->j_last_flush_trans_id = |
2490 | le32_to_cpu(jh->j_last_flush_trans_id); | |
2491 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; | |
2492 | } else { | |
2493 | journal->j_mount_id = newest_mount_id + 1; | |
2494 | } | |
a9dd3643 | 2495 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " |
bd4c625c LT |
2496 | "newest_mount_id to %lu", journal->j_mount_id); |
2497 | journal->j_first_unflushed_offset = journal->j_start; | |
2498 | if (replay_count > 0) { | |
a9dd3643 | 2499 | reiserfs_info(sb, |
bd4c625c LT |
2500 | "replayed %d transactions in %lu seconds\n", |
2501 | replay_count, get_seconds() - start); | |
2502 | } | |
a9dd3643 JM |
2503 | if (!bdev_read_only(sb->s_bdev) && |
2504 | _update_journal_header_block(sb, journal->j_start, | |
bd4c625c LT |
2505 | journal->j_last_flush_trans_id)) { |
2506 | /* replay failed, caller must call free_journal_ram and abort | |
2507 | ** the mount | |
2508 | */ | |
2509 | return -1; | |
2510 | } | |
2511 | return 0; | |
1da177e4 LT |
2512 | } |
2513 | ||
2514 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) | |
2515 | { | |
bd4c625c | 2516 | struct reiserfs_journal_list *jl; |
8c777cc4 PE |
2517 | jl = kzalloc(sizeof(struct reiserfs_journal_list), |
2518 | GFP_NOFS | __GFP_NOFAIL); | |
bd4c625c LT |
2519 | INIT_LIST_HEAD(&jl->j_list); |
2520 | INIT_LIST_HEAD(&jl->j_working_list); | |
2521 | INIT_LIST_HEAD(&jl->j_tail_bh_list); | |
2522 | INIT_LIST_HEAD(&jl->j_bh_list); | |
90415dea | 2523 | mutex_init(&jl->j_commit_mutex); |
bd4c625c LT |
2524 | SB_JOURNAL(s)->j_num_lists++; |
2525 | get_journal_list(jl); | |
2526 | return jl; | |
2527 | } | |
2528 | ||
a9dd3643 | 2529 | static void journal_list_init(struct super_block *sb) |
bd4c625c | 2530 | { |
a9dd3643 | 2531 | SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
2532 | } |
2533 | ||
2534 | static int release_journal_dev(struct super_block *super, | |
2535 | struct reiserfs_journal *journal) | |
2536 | { | |
2537 | int result; | |
2538 | ||
2539 | result = 0; | |
2540 | ||
86098fa0 | 2541 | if (journal->j_dev_bd != NULL) { |
e5eb8caa | 2542 | result = blkdev_put(journal->j_dev_bd, journal->j_dev_mode); |
bd4c625c LT |
2543 | journal->j_dev_bd = NULL; |
2544 | } | |
2545 | ||
2546 | if (result != 0) { | |
45b03d5e JM |
2547 | reiserfs_warning(super, "sh-457", |
2548 | "Cannot release journal device: %i", result); | |
bd4c625c LT |
2549 | } |
2550 | return result; | |
2551 | } | |
2552 | ||
2553 | static int journal_init_dev(struct super_block *super, | |
2554 | struct reiserfs_journal *journal, | |
2555 | const char *jdev_name) | |
1da177e4 LT |
2556 | { |
2557 | int result; | |
2558 | dev_t jdev; | |
e525fd89 | 2559 | fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; |
1da177e4 LT |
2560 | char b[BDEVNAME_SIZE]; |
2561 | ||
2562 | result = 0; | |
2563 | ||
bd4c625c | 2564 | journal->j_dev_bd = NULL; |
bd4c625c LT |
2565 | jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? |
2566 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; | |
1da177e4 LT |
2567 | |
2568 | if (bdev_read_only(super->s_bdev)) | |
bd4c625c | 2569 | blkdev_mode = FMODE_READ; |
1da177e4 LT |
2570 | |
2571 | /* there is no "jdev" option and journal is on separate device */ | |
bd4c625c | 2572 | if ((!jdev_name || !jdev_name[0])) { |
e525fd89 TH |
2573 | if (jdev == super->s_dev) |
2574 | blkdev_mode &= ~FMODE_EXCL; | |
d4d77629 TH |
2575 | journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, |
2576 | journal); | |
e5eb8caa | 2577 | journal->j_dev_mode = blkdev_mode; |
1da177e4 LT |
2578 | if (IS_ERR(journal->j_dev_bd)) { |
2579 | result = PTR_ERR(journal->j_dev_bd); | |
2580 | journal->j_dev_bd = NULL; | |
45b03d5e | 2581 | reiserfs_warning(super, "sh-458", |
bd4c625c LT |
2582 | "cannot init journal device '%s': %i", |
2583 | __bdevname(jdev, b), result); | |
1da177e4 | 2584 | return result; |
e525fd89 | 2585 | } else if (jdev != super->s_dev) |
1da177e4 | 2586 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
86098fa0 | 2587 | |
1da177e4 LT |
2588 | return 0; |
2589 | } | |
2590 | ||
e5eb8caa | 2591 | journal->j_dev_mode = blkdev_mode; |
d4d77629 | 2592 | journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); |
86098fa0 CH |
2593 | if (IS_ERR(journal->j_dev_bd)) { |
2594 | result = PTR_ERR(journal->j_dev_bd); | |
2595 | journal->j_dev_bd = NULL; | |
bd4c625c LT |
2596 | reiserfs_warning(super, |
2597 | "journal_init_dev: Cannot open '%s': %i", | |
2598 | jdev_name, result); | |
86098fa0 | 2599 | return result; |
1da177e4 | 2600 | } |
86098fa0 CH |
2601 | |
2602 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
2603 | reiserfs_info(super, | |
2604 | "journal_init_dev: journal device: %s\n", | |
2605 | bdevname(journal->j_dev_bd, b)); | |
2606 | return 0; | |
1da177e4 LT |
2607 | } |
2608 | ||
cf3d0b81 ES |
2609 | /** |
2610 | * When creating/tuning a file system user can assign some | |
2611 | * journal params within boundaries which depend on the ratio | |
2612 | * blocksize/standard_blocksize. | |
2613 | * | |
2614 | * For blocks >= standard_blocksize transaction size should | |
2615 | * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more | |
2616 | * then JOURNAL_TRANS_MAX_DEFAULT. | |
2617 | * | |
2618 | * For blocks < standard_blocksize these boundaries should be | |
2619 | * decreased proportionally. | |
2620 | */ | |
2621 | #define REISERFS_STANDARD_BLKSIZE (4096) | |
2622 | ||
a9dd3643 | 2623 | static int check_advise_trans_params(struct super_block *sb, |
cf3d0b81 ES |
2624 | struct reiserfs_journal *journal) |
2625 | { | |
2626 | if (journal->j_trans_max) { | |
2627 | /* Non-default journal params. | |
2628 | Do sanity check for them. */ | |
2629 | int ratio = 1; | |
a9dd3643 JM |
2630 | if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) |
2631 | ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; | |
cf3d0b81 ES |
2632 | |
2633 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || | |
2634 | journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || | |
a9dd3643 | 2635 | SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < |
cf3d0b81 | 2636 | JOURNAL_MIN_RATIO) { |
a9dd3643 | 2637 | reiserfs_warning(sb, "sh-462", |
45b03d5e JM |
2638 | "bad transaction max size (%u). " |
2639 | "FSCK?", journal->j_trans_max); | |
cf3d0b81 ES |
2640 | return 1; |
2641 | } | |
2642 | if (journal->j_max_batch != (journal->j_trans_max) * | |
2643 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { | |
a9dd3643 | 2644 | reiserfs_warning(sb, "sh-463", |
45b03d5e JM |
2645 | "bad transaction max batch (%u). " |
2646 | "FSCK?", journal->j_max_batch); | |
cf3d0b81 ES |
2647 | return 1; |
2648 | } | |
2649 | } else { | |
2650 | /* Default journal params. | |
2651 | The file system was created by old version | |
2652 | of mkreiserfs, so some fields contain zeros, | |
2653 | and we need to advise proper values for them */ | |
a9dd3643 JM |
2654 | if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { |
2655 | reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", | |
2656 | sb->s_blocksize); | |
45b03d5e JM |
2657 | return 1; |
2658 | } | |
cf3d0b81 ES |
2659 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; |
2660 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; | |
2661 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; | |
2662 | } | |
2663 | return 0; | |
2664 | } | |
2665 | ||
1da177e4 LT |
2666 | /* |
2667 | ** must be called once on fs mount. calls journal_read for you | |
2668 | */ | |
a9dd3643 | 2669 | int journal_init(struct super_block *sb, const char *j_dev_name, |
bd4c625c LT |
2670 | int old_format, unsigned int commit_max_age) |
2671 | { | |
a9dd3643 | 2672 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; |
bd4c625c LT |
2673 | struct buffer_head *bhjh; |
2674 | struct reiserfs_super_block *rs; | |
2675 | struct reiserfs_journal_header *jh; | |
2676 | struct reiserfs_journal *journal; | |
2677 | struct reiserfs_journal_list *jl; | |
2678 | char b[BDEVNAME_SIZE]; | |
98ea3f50 | 2679 | int ret; |
bd4c625c | 2680 | |
98ea3f50 FW |
2681 | /* |
2682 | * Unlock here to avoid various RECLAIM-FS-ON <-> IN-RECLAIM-FS | |
2683 | * dependency inversion warnings. | |
2684 | */ | |
2685 | reiserfs_write_unlock(sb); | |
558feb08 | 2686 | journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); |
bd4c625c | 2687 | if (!journal) { |
a9dd3643 | 2688 | reiserfs_warning(sb, "journal-1256", |
45b03d5e | 2689 | "unable to get memory for journal structure"); |
98ea3f50 | 2690 | reiserfs_write_lock(sb); |
bd4c625c LT |
2691 | return 1; |
2692 | } | |
bd4c625c LT |
2693 | INIT_LIST_HEAD(&journal->j_bitmap_nodes); |
2694 | INIT_LIST_HEAD(&journal->j_prealloc_list); | |
2695 | INIT_LIST_HEAD(&journal->j_working_list); | |
2696 | INIT_LIST_HEAD(&journal->j_journal_list); | |
2697 | journal->j_persistent_trans = 0; | |
98ea3f50 FW |
2698 | ret = reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, |
2699 | reiserfs_bmap_count(sb)); | |
2700 | reiserfs_write_lock(sb); | |
2701 | if (ret) | |
bd4c625c | 2702 | goto free_and_return; |
98ea3f50 | 2703 | |
a9dd3643 | 2704 | allocate_bitmap_nodes(sb); |
bd4c625c LT |
2705 | |
2706 | /* reserved for journal area support */ | |
a9dd3643 | 2707 | SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? |
bd4c625c | 2708 | REISERFS_OLD_DISK_OFFSET_IN_BYTES |
a9dd3643 JM |
2709 | / sb->s_blocksize + |
2710 | reiserfs_bmap_count(sb) + | |
bd4c625c LT |
2711 | 1 : |
2712 | REISERFS_DISK_OFFSET_IN_BYTES / | |
a9dd3643 | 2713 | sb->s_blocksize + 2); |
bd4c625c | 2714 | |
25985edc | 2715 | /* Sanity check to see is the standard journal fitting within first bitmap |
bd4c625c | 2716 | (actual for small blocksizes) */ |
a9dd3643 JM |
2717 | if (!SB_ONDISK_JOURNAL_DEVICE(sb) && |
2718 | (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + | |
2719 | SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { | |
2720 | reiserfs_warning(sb, "journal-1393", | |
45b03d5e JM |
2721 | "journal does not fit for area addressed " |
2722 | "by first of bitmap blocks. It starts at " | |
bd4c625c | 2723 | "%u and its size is %u. Block size %ld", |
a9dd3643 JM |
2724 | SB_JOURNAL_1st_RESERVED_BLOCK(sb), |
2725 | SB_ONDISK_JOURNAL_SIZE(sb), | |
2726 | sb->s_blocksize); | |
bd4c625c LT |
2727 | goto free_and_return; |
2728 | } | |
2729 | ||
193be0ee FW |
2730 | /* |
2731 | * We need to unlock here to avoid creating the following | |
2732 | * dependency: | |
2733 | * reiserfs_lock -> sysfs_mutex | |
2734 | * Because the reiserfs mmap path creates the following dependency: | |
2735 | * mm->mmap -> reiserfs_lock, hence we have | |
2736 | * mm->mmap -> reiserfs_lock ->sysfs_mutex | |
2737 | * This would ends up in a circular dependency with sysfs readdir path | |
2738 | * which does sysfs_mutex -> mm->mmap_sem | |
2739 | * This is fine because the reiserfs lock is useless in mount path, | |
2740 | * at least until we call journal_begin. We keep it for paranoid | |
2741 | * reasons. | |
2742 | */ | |
2743 | reiserfs_write_unlock(sb); | |
a9dd3643 | 2744 | if (journal_init_dev(sb, journal, j_dev_name) != 0) { |
193be0ee | 2745 | reiserfs_write_lock(sb); |
a9dd3643 | 2746 | reiserfs_warning(sb, "sh-462", |
45b03d5e | 2747 | "unable to initialize jornal device"); |
bd4c625c LT |
2748 | goto free_and_return; |
2749 | } | |
193be0ee | 2750 | reiserfs_write_lock(sb); |
bd4c625c | 2751 | |
a9dd3643 | 2752 | rs = SB_DISK_SUPER_BLOCK(sb); |
bd4c625c LT |
2753 | |
2754 | /* read journal header */ | |
a9dd3643 JM |
2755 | bhjh = journal_bread(sb, |
2756 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2757 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2758 | if (!bhjh) { |
a9dd3643 | 2759 | reiserfs_warning(sb, "sh-459", |
45b03d5e | 2760 | "unable to read journal header"); |
bd4c625c LT |
2761 | goto free_and_return; |
2762 | } | |
2763 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); | |
2764 | ||
2765 | /* make sure that journal matches to the super block */ | |
2766 | if (is_reiserfs_jr(rs) | |
2767 | && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != | |
2768 | sb_jp_journal_magic(rs))) { | |
a9dd3643 | 2769 | reiserfs_warning(sb, "sh-460", |
45b03d5e JM |
2770 | "journal header magic %x (device %s) does " |
2771 | "not match to magic found in super block %x", | |
2772 | jh->jh_journal.jp_journal_magic, | |
bd4c625c LT |
2773 | bdevname(journal->j_dev_bd, b), |
2774 | sb_jp_journal_magic(rs)); | |
2775 | brelse(bhjh); | |
2776 | goto free_and_return; | |
2777 | } | |
2778 | ||
2779 | journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); | |
2780 | journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); | |
2781 | journal->j_max_commit_age = | |
2782 | le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); | |
2783 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
2784 | ||
a9dd3643 | 2785 | if (check_advise_trans_params(sb, journal) != 0) |
cf3d0b81 | 2786 | goto free_and_return; |
bd4c625c LT |
2787 | journal->j_default_max_commit_age = journal->j_max_commit_age; |
2788 | ||
2789 | if (commit_max_age != 0) { | |
2790 | journal->j_max_commit_age = commit_max_age; | |
2791 | journal->j_max_trans_age = commit_max_age; | |
2792 | } | |
2793 | ||
a9dd3643 | 2794 | reiserfs_info(sb, "journal params: device %s, size %u, " |
bd4c625c LT |
2795 | "journal first block %u, max trans len %u, max batch %u, " |
2796 | "max commit age %u, max trans age %u\n", | |
2797 | bdevname(journal->j_dev_bd, b), | |
a9dd3643 JM |
2798 | SB_ONDISK_JOURNAL_SIZE(sb), |
2799 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), | |
bd4c625c LT |
2800 | journal->j_trans_max, |
2801 | journal->j_max_batch, | |
2802 | journal->j_max_commit_age, journal->j_max_trans_age); | |
2803 | ||
2804 | brelse(bhjh); | |
2805 | ||
2806 | journal->j_list_bitmap_index = 0; | |
a9dd3643 | 2807 | journal_list_init(sb); |
bd4c625c LT |
2808 | |
2809 | memset(journal->j_list_hash_table, 0, | |
2810 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
2811 | ||
2812 | INIT_LIST_HEAD(&journal->j_dirty_buffers); | |
2813 | spin_lock_init(&journal->j_dirty_buffers_lock); | |
2814 | ||
2815 | journal->j_start = 0; | |
2816 | journal->j_len = 0; | |
2817 | journal->j_len_alloc = 0; | |
2818 | atomic_set(&(journal->j_wcount), 0); | |
2819 | atomic_set(&(journal->j_async_throttle), 0); | |
2820 | journal->j_bcount = 0; | |
2821 | journal->j_trans_start_time = 0; | |
2822 | journal->j_last = NULL; | |
2823 | journal->j_first = NULL; | |
2824 | init_waitqueue_head(&(journal->j_join_wait)); | |
f68215c4 | 2825 | mutex_init(&journal->j_mutex); |
afe70259 | 2826 | mutex_init(&journal->j_flush_mutex); |
bd4c625c LT |
2827 | |
2828 | journal->j_trans_id = 10; | |
2829 | journal->j_mount_id = 10; | |
2830 | journal->j_state = 0; | |
2831 | atomic_set(&(journal->j_jlock), 0); | |
bbec9191 | 2832 | reiserfs_write_unlock(sb); |
bd4c625c | 2833 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes); |
bbec9191 | 2834 | reiserfs_write_lock(sb); |
bd4c625c LT |
2835 | journal->j_cnode_free_orig = journal->j_cnode_free_list; |
2836 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; | |
2837 | journal->j_cnode_used = 0; | |
2838 | journal->j_must_wait = 0; | |
2839 | ||
576f6d79 | 2840 | if (journal->j_cnode_free == 0) { |
a9dd3643 | 2841 | reiserfs_warning(sb, "journal-2004", "Journal cnode memory " |
576f6d79 JM |
2842 | "allocation failed (%ld bytes). Journal is " |
2843 | "too large for available memory. Usually " | |
2844 | "this is due to a journal that is too large.", | |
2845 | sizeof (struct reiserfs_journal_cnode) * num_cnodes); | |
2846 | goto free_and_return; | |
2847 | } | |
2848 | ||
a9dd3643 | 2849 | init_journal_hash(sb); |
bd4c625c | 2850 | jl = journal->j_current_jl; |
a9dd3643 | 2851 | jl->j_list_bitmap = get_list_bitmap(sb, jl); |
bd4c625c | 2852 | if (!jl->j_list_bitmap) { |
a9dd3643 | 2853 | reiserfs_warning(sb, "journal-2005", |
45b03d5e | 2854 | "get_list_bitmap failed for journal list 0"); |
bd4c625c LT |
2855 | goto free_and_return; |
2856 | } | |
a9dd3643 JM |
2857 | if (journal_read(sb) < 0) { |
2858 | reiserfs_warning(sb, "reiserfs-2006", | |
45b03d5e | 2859 | "Replay Failure, unable to mount"); |
bd4c625c LT |
2860 | goto free_and_return; |
2861 | } | |
2862 | ||
2863 | reiserfs_mounted_fs_count++; | |
48f6ba5e FW |
2864 | if (reiserfs_mounted_fs_count <= 1) { |
2865 | reiserfs_write_unlock(sb); | |
28aadf51 | 2866 | commit_wq = alloc_workqueue("reiserfs", WQ_MEM_RECLAIM, 0); |
48f6ba5e FW |
2867 | reiserfs_write_lock(sb); |
2868 | } | |
bd4c625c | 2869 | |
c4028958 | 2870 | INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); |
a9dd3643 | 2871 | journal->j_work_sb = sb; |
bd4c625c LT |
2872 | return 0; |
2873 | free_and_return: | |
a9dd3643 | 2874 | free_journal_ram(sb); |
bd4c625c | 2875 | return 1; |
1da177e4 LT |
2876 | } |
2877 | ||
2878 | /* | |
2879 | ** test for a polite end of the current transaction. Used by file_write, and should | |
2880 | ** be used by delete to make sure they don't write more than can fit inside a single | |
2881 | ** transaction | |
2882 | */ | |
bd4c625c LT |
2883 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, |
2884 | int new_alloc) | |
2885 | { | |
2886 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2887 | time_t now = get_seconds(); | |
2888 | /* cannot restart while nested */ | |
2889 | BUG_ON(!th->t_trans_id); | |
2890 | if (th->t_refcount > 1) | |
2891 | return 0; | |
2892 | if (journal->j_must_wait > 0 || | |
2893 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || | |
2894 | atomic_read(&(journal->j_jlock)) || | |
2895 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || | |
2896 | journal->j_cnode_free < (journal->j_trans_max * 3)) { | |
2897 | return 1; | |
2898 | } | |
6ae1ea44 CM |
2899 | /* protected by the BKL here */ |
2900 | journal->j_len_alloc += new_alloc; | |
2901 | th->t_blocks_allocated += new_alloc ; | |
bd4c625c | 2902 | return 0; |
1da177e4 LT |
2903 | } |
2904 | ||
0222e657 | 2905 | /* this must be called inside a transaction, and requires the |
1da177e4 LT |
2906 | ** kernel_lock to be held |
2907 | */ | |
bd4c625c LT |
2908 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) |
2909 | { | |
2910 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2911 | BUG_ON(!th->t_trans_id); | |
2912 | journal->j_must_wait = 1; | |
2913 | set_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2914 | return; | |
1da177e4 LT |
2915 | } |
2916 | ||
2917 | /* this must be called without a transaction started, and does not | |
2918 | ** require BKL | |
2919 | */ | |
bd4c625c LT |
2920 | void reiserfs_allow_writes(struct super_block *s) |
2921 | { | |
2922 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2923 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2924 | wake_up(&journal->j_join_wait); | |
1da177e4 LT |
2925 | } |
2926 | ||
2927 | /* this must be called without a transaction started, and does not | |
2928 | ** require BKL | |
2929 | */ | |
bd4c625c LT |
2930 | void reiserfs_wait_on_write_block(struct super_block *s) |
2931 | { | |
2932 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2933 | wait_event(journal->j_join_wait, | |
2934 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); | |
2935 | } | |
2936 | ||
2937 | static void queue_log_writer(struct super_block *s) | |
2938 | { | |
2939 | wait_queue_t wait; | |
2940 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2941 | set_bit(J_WRITERS_QUEUED, &journal->j_state); | |
2942 | ||
2943 | /* | |
2944 | * we don't want to use wait_event here because | |
2945 | * we only want to wait once. | |
2946 | */ | |
2947 | init_waitqueue_entry(&wait, current); | |
2948 | add_wait_queue(&journal->j_join_wait, &wait); | |
1da177e4 | 2949 | set_current_state(TASK_UNINTERRUPTIBLE); |
8ebc4232 FW |
2950 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { |
2951 | reiserfs_write_unlock(s); | |
bd4c625c | 2952 | schedule(); |
8ebc4232 FW |
2953 | reiserfs_write_lock(s); |
2954 | } | |
5ab2f7e0 | 2955 | __set_current_state(TASK_RUNNING); |
bd4c625c LT |
2956 | remove_wait_queue(&journal->j_join_wait, &wait); |
2957 | } | |
2958 | ||
2959 | static void wake_queued_writers(struct super_block *s) | |
2960 | { | |
2961 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2962 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2963 | wake_up(&journal->j_join_wait); | |
2964 | } | |
2965 | ||
600ed416 | 2966 | static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) |
bd4c625c LT |
2967 | { |
2968 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
2969 | unsigned long bcount = journal->j_bcount; | |
2970 | while (1) { | |
8ebc4232 | 2971 | reiserfs_write_unlock(sb); |
041e0e3b | 2972 | schedule_timeout_uninterruptible(1); |
8ebc4232 | 2973 | reiserfs_write_lock(sb); |
bd4c625c LT |
2974 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; |
2975 | while ((atomic_read(&journal->j_wcount) > 0 || | |
2976 | atomic_read(&journal->j_jlock)) && | |
2977 | journal->j_trans_id == trans_id) { | |
2978 | queue_log_writer(sb); | |
2979 | } | |
2980 | if (journal->j_trans_id != trans_id) | |
2981 | break; | |
2982 | if (bcount == journal->j_bcount) | |
2983 | break; | |
2984 | bcount = journal->j_bcount; | |
1da177e4 | 2985 | } |
1da177e4 LT |
2986 | } |
2987 | ||
2988 | /* join == true if you must join an existing transaction. | |
2989 | ** join == false if you can deal with waiting for others to finish | |
2990 | ** | |
2991 | ** this will block until the transaction is joinable. send the number of blocks you | |
2992 | ** expect to use in nblocks. | |
2993 | */ | |
bd4c625c | 2994 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
a9dd3643 | 2995 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
2996 | int join) |
2997 | { | |
2998 | time_t now = get_seconds(); | |
600ed416 | 2999 | unsigned int old_trans_id; |
a9dd3643 | 3000 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3001 | struct reiserfs_transaction_handle myth; |
3002 | int sched_count = 0; | |
3003 | int retval; | |
3004 | ||
a9dd3643 | 3005 | reiserfs_check_lock_depth(sb, "journal_begin"); |
14a61442 | 3006 | BUG_ON(nblocks > journal->j_trans_max); |
bd4c625c | 3007 | |
a9dd3643 | 3008 | PROC_INFO_INC(sb, journal.journal_being); |
bd4c625c LT |
3009 | /* set here for journal_join */ |
3010 | th->t_refcount = 1; | |
a9dd3643 | 3011 | th->t_super = sb; |
bd4c625c LT |
3012 | |
3013 | relock: | |
a9dd3643 | 3014 | lock_journal(sb); |
bd4c625c | 3015 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { |
a9dd3643 | 3016 | unlock_journal(sb); |
bd4c625c LT |
3017 | retval = journal->j_errno; |
3018 | goto out_fail; | |
3019 | } | |
3020 | journal->j_bcount++; | |
3021 | ||
3022 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { | |
a9dd3643 | 3023 | unlock_journal(sb); |
8ebc4232 | 3024 | reiserfs_write_unlock(sb); |
a9dd3643 | 3025 | reiserfs_wait_on_write_block(sb); |
8ebc4232 | 3026 | reiserfs_write_lock(sb); |
a9dd3643 | 3027 | PROC_INFO_INC(sb, journal.journal_relock_writers); |
bd4c625c LT |
3028 | goto relock; |
3029 | } | |
3030 | now = get_seconds(); | |
3031 | ||
3032 | /* if there is no room in the journal OR | |
0222e657 | 3033 | ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning |
bd4c625c LT |
3034 | ** we don't sleep if there aren't other writers |
3035 | */ | |
3036 | ||
3037 | if ((!join && journal->j_must_wait > 0) || | |
3038 | (!join | |
3039 | && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) | |
3040 | || (!join && atomic_read(&journal->j_wcount) > 0 | |
3041 | && journal->j_trans_start_time > 0 | |
3042 | && (now - journal->j_trans_start_time) > | |
3043 | journal->j_max_trans_age) || (!join | |
3044 | && atomic_read(&journal->j_jlock)) | |
3045 | || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { | |
3046 | ||
3047 | old_trans_id = journal->j_trans_id; | |
a9dd3643 | 3048 | unlock_journal(sb); /* allow others to finish this transaction */ |
bd4c625c LT |
3049 | |
3050 | if (!join && (journal->j_len_alloc + nblocks + 2) >= | |
3051 | journal->j_max_batch && | |
3052 | ((journal->j_len + nblocks + 2) * 100) < | |
3053 | (journal->j_len_alloc * 75)) { | |
3054 | if (atomic_read(&journal->j_wcount) > 10) { | |
3055 | sched_count++; | |
a9dd3643 | 3056 | queue_log_writer(sb); |
bd4c625c LT |
3057 | goto relock; |
3058 | } | |
3059 | } | |
3060 | /* don't mess with joining the transaction if all we have to do is | |
3061 | * wait for someone else to do a commit | |
3062 | */ | |
3063 | if (atomic_read(&journal->j_jlock)) { | |
3064 | while (journal->j_trans_id == old_trans_id && | |
3065 | atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3066 | queue_log_writer(sb); |
bd4c625c LT |
3067 | } |
3068 | goto relock; | |
3069 | } | |
a9dd3643 | 3070 | retval = journal_join(&myth, sb, 1); |
bd4c625c LT |
3071 | if (retval) |
3072 | goto out_fail; | |
3073 | ||
3074 | /* someone might have ended the transaction while we joined */ | |
3075 | if (old_trans_id != journal->j_trans_id) { | |
a9dd3643 | 3076 | retval = do_journal_end(&myth, sb, 1, 0); |
bd4c625c | 3077 | } else { |
a9dd3643 | 3078 | retval = do_journal_end(&myth, sb, 1, COMMIT_NOW); |
bd4c625c LT |
3079 | } |
3080 | ||
3081 | if (retval) | |
3082 | goto out_fail; | |
3083 | ||
a9dd3643 | 3084 | PROC_INFO_INC(sb, journal.journal_relock_wcount); |
bd4c625c LT |
3085 | goto relock; |
3086 | } | |
3087 | /* we are the first writer, set trans_id */ | |
3088 | if (journal->j_trans_start_time == 0) { | |
3089 | journal->j_trans_start_time = get_seconds(); | |
3090 | } | |
3091 | atomic_inc(&(journal->j_wcount)); | |
3092 | journal->j_len_alloc += nblocks; | |
3093 | th->t_blocks_logged = 0; | |
3094 | th->t_blocks_allocated = nblocks; | |
3095 | th->t_trans_id = journal->j_trans_id; | |
a9dd3643 | 3096 | unlock_journal(sb); |
bd4c625c | 3097 | INIT_LIST_HEAD(&th->t_list); |
bd4c625c LT |
3098 | return 0; |
3099 | ||
3100 | out_fail: | |
3101 | memset(th, 0, sizeof(*th)); | |
3102 | /* Re-set th->t_super, so we can properly keep track of how many | |
3103 | * persistent transactions there are. We need to do this so if this | |
3104 | * call is part of a failed restart_transaction, we can free it later */ | |
a9dd3643 | 3105 | th->t_super = sb; |
bd4c625c LT |
3106 | return retval; |
3107 | } | |
3108 | ||
3109 | struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct | |
3110 | super_block | |
3111 | *s, | |
3112 | int nblocks) | |
3113 | { | |
3114 | int ret; | |
3115 | struct reiserfs_transaction_handle *th; | |
3116 | ||
3117 | /* if we're nesting into an existing transaction. It will be | |
3118 | ** persistent on its own | |
3119 | */ | |
3120 | if (reiserfs_transaction_running(s)) { | |
3121 | th = current->journal_info; | |
3122 | th->t_refcount++; | |
14a61442 ES |
3123 | BUG_ON(th->t_refcount < 2); |
3124 | ||
bd4c625c LT |
3125 | return th; |
3126 | } | |
d739b42b | 3127 | th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); |
bd4c625c LT |
3128 | if (!th) |
3129 | return NULL; | |
3130 | ret = journal_begin(th, s, nblocks); | |
3131 | if (ret) { | |
d739b42b | 3132 | kfree(th); |
bd4c625c LT |
3133 | return NULL; |
3134 | } | |
3135 | ||
3136 | SB_JOURNAL(s)->j_persistent_trans++; | |
3137 | return th; | |
3138 | } | |
3139 | ||
3140 | int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) | |
3141 | { | |
3142 | struct super_block *s = th->t_super; | |
3143 | int ret = 0; | |
3144 | if (th->t_trans_id) | |
3145 | ret = journal_end(th, th->t_super, th->t_blocks_allocated); | |
3146 | else | |
3147 | ret = -EIO; | |
3148 | if (th->t_refcount == 0) { | |
3149 | SB_JOURNAL(s)->j_persistent_trans--; | |
d739b42b | 3150 | kfree(th); |
bd4c625c LT |
3151 | } |
3152 | return ret; | |
3153 | } | |
3154 | ||
3155 | static int journal_join(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3156 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3157 | { |
3158 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3159 | ||
3160 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
3161 | ** pointer | |
3162 | */ | |
3163 | th->t_handle_save = cur_th; | |
14a61442 | 3164 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
a9dd3643 | 3165 | return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN); |
bd4c625c LT |
3166 | } |
3167 | ||
3168 | int journal_join_abort(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3169 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3170 | { |
3171 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3172 | ||
3173 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
3174 | ** pointer | |
3175 | */ | |
3176 | th->t_handle_save = cur_th; | |
14a61442 | 3177 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
a9dd3643 | 3178 | return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT); |
bd4c625c LT |
3179 | } |
3180 | ||
3181 | int journal_begin(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3182 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3183 | { |
3184 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3185 | int ret; | |
3186 | ||
3187 | th->t_handle_save = NULL; | |
3188 | if (cur_th) { | |
3189 | /* we are nesting into the current transaction */ | |
a9dd3643 | 3190 | if (cur_th->t_super == sb) { |
bd4c625c LT |
3191 | BUG_ON(!cur_th->t_refcount); |
3192 | cur_th->t_refcount++; | |
3193 | memcpy(th, cur_th, sizeof(*th)); | |
3194 | if (th->t_refcount <= 1) | |
a9dd3643 | 3195 | reiserfs_warning(sb, "reiserfs-2005", |
45b03d5e JM |
3196 | "BAD: refcount <= 1, but " |
3197 | "journal_info != 0"); | |
bd4c625c LT |
3198 | return 0; |
3199 | } else { | |
3200 | /* we've ended up with a handle from a different filesystem. | |
3201 | ** save it and restore on journal_end. This should never | |
3202 | ** really happen... | |
3203 | */ | |
a9dd3643 | 3204 | reiserfs_warning(sb, "clm-2100", |
45b03d5e | 3205 | "nesting info a different FS"); |
bd4c625c LT |
3206 | th->t_handle_save = current->journal_info; |
3207 | current->journal_info = th; | |
3208 | } | |
1da177e4 | 3209 | } else { |
bd4c625c LT |
3210 | current->journal_info = th; |
3211 | } | |
a9dd3643 | 3212 | ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); |
14a61442 | 3213 | BUG_ON(current->journal_info != th); |
1da177e4 | 3214 | |
bd4c625c LT |
3215 | /* I guess this boils down to being the reciprocal of clm-2100 above. |
3216 | * If do_journal_begin_r fails, we need to put it back, since journal_end | |
3217 | * won't be called to do it. */ | |
3218 | if (ret) | |
3219 | current->journal_info = th->t_handle_save; | |
3220 | else | |
3221 | BUG_ON(!th->t_refcount); | |
1da177e4 | 3222 | |
bd4c625c | 3223 | return ret; |
1da177e4 LT |
3224 | } |
3225 | ||
3226 | /* | |
3227 | ** puts bh into the current transaction. If it was already there, reorders removes the | |
3228 | ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). | |
3229 | ** | |
3230 | ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the | |
3231 | ** transaction is committed. | |
0222e657 | 3232 | ** |
1da177e4 LT |
3233 | ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. |
3234 | */ | |
bd4c625c | 3235 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3236 | struct super_block *sb, struct buffer_head *bh) |
bd4c625c | 3237 | { |
a9dd3643 | 3238 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3239 | struct reiserfs_journal_cnode *cn = NULL; |
3240 | int count_already_incd = 0; | |
3241 | int prepared = 0; | |
3242 | BUG_ON(!th->t_trans_id); | |
3243 | ||
a9dd3643 | 3244 | PROC_INFO_INC(sb, journal.mark_dirty); |
bd4c625c | 3245 | if (th->t_trans_id != journal->j_trans_id) { |
c3a9c210 JM |
3246 | reiserfs_panic(th->t_super, "journal-1577", |
3247 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3248 | th->t_trans_id, journal->j_trans_id); |
3249 | } | |
3250 | ||
a9dd3643 | 3251 | sb->s_dirt = 1; |
bd4c625c LT |
3252 | |
3253 | prepared = test_clear_buffer_journal_prepared(bh); | |
3254 | clear_buffer_journal_restore_dirty(bh); | |
3255 | /* already in this transaction, we are done */ | |
3256 | if (buffer_journaled(bh)) { | |
a9dd3643 | 3257 | PROC_INFO_INC(sb, journal.mark_dirty_already); |
bd4c625c LT |
3258 | return 0; |
3259 | } | |
3260 | ||
3261 | /* this must be turned into a panic instead of a warning. We can't allow | |
3262 | ** a dirty or journal_dirty or locked buffer to be logged, as some changes | |
3263 | ** could get to disk too early. NOT GOOD. | |
3264 | */ | |
3265 | if (!prepared || buffer_dirty(bh)) { | |
a9dd3643 | 3266 | reiserfs_warning(sb, "journal-1777", |
45b03d5e | 3267 | "buffer %llu bad state " |
bd4c625c LT |
3268 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", |
3269 | (unsigned long long)bh->b_blocknr, | |
3270 | prepared ? ' ' : '!', | |
3271 | buffer_locked(bh) ? ' ' : '!', | |
3272 | buffer_dirty(bh) ? ' ' : '!', | |
3273 | buffer_journal_dirty(bh) ? ' ' : '!'); | |
3274 | } | |
3275 | ||
3276 | if (atomic_read(&(journal->j_wcount)) <= 0) { | |
a9dd3643 | 3277 | reiserfs_warning(sb, "journal-1409", |
45b03d5e | 3278 | "returning because j_wcount was %d", |
bd4c625c LT |
3279 | atomic_read(&(journal->j_wcount))); |
3280 | return 1; | |
3281 | } | |
0222e657 | 3282 | /* this error means I've screwed up, and we've overflowed the transaction. |
bd4c625c LT |
3283 | ** Nothing can be done here, except make the FS readonly or panic. |
3284 | */ | |
3285 | if (journal->j_len >= journal->j_trans_max) { | |
c3a9c210 JM |
3286 | reiserfs_panic(th->t_super, "journal-1413", |
3287 | "j_len (%lu) is too big", | |
bd4c625c LT |
3288 | journal->j_len); |
3289 | } | |
3290 | ||
3291 | if (buffer_journal_dirty(bh)) { | |
3292 | count_already_incd = 1; | |
a9dd3643 | 3293 | PROC_INFO_INC(sb, journal.mark_dirty_notjournal); |
bd4c625c LT |
3294 | clear_buffer_journal_dirty(bh); |
3295 | } | |
3296 | ||
3297 | if (journal->j_len > journal->j_len_alloc) { | |
3298 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; | |
3299 | } | |
3300 | ||
3301 | set_buffer_journaled(bh); | |
3302 | ||
3303 | /* now put this guy on the end */ | |
3304 | if (!cn) { | |
a9dd3643 | 3305 | cn = get_cnode(sb); |
bd4c625c | 3306 | if (!cn) { |
a9dd3643 | 3307 | reiserfs_panic(sb, "journal-4", "get_cnode failed!"); |
bd4c625c LT |
3308 | } |
3309 | ||
3310 | if (th->t_blocks_logged == th->t_blocks_allocated) { | |
3311 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; | |
3312 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; | |
3313 | } | |
3314 | th->t_blocks_logged++; | |
3315 | journal->j_len++; | |
3316 | ||
3317 | cn->bh = bh; | |
3318 | cn->blocknr = bh->b_blocknr; | |
a9dd3643 | 3319 | cn->sb = sb; |
bd4c625c LT |
3320 | cn->jlist = NULL; |
3321 | insert_journal_hash(journal->j_hash_table, cn); | |
3322 | if (!count_already_incd) { | |
3323 | get_bh(bh); | |
3324 | } | |
3325 | } | |
3326 | cn->next = NULL; | |
3327 | cn->prev = journal->j_last; | |
3328 | cn->bh = bh; | |
3329 | if (journal->j_last) { | |
3330 | journal->j_last->next = cn; | |
3331 | journal->j_last = cn; | |
3332 | } else { | |
3333 | journal->j_first = cn; | |
3334 | journal->j_last = cn; | |
3335 | } | |
3336 | return 0; | |
3337 | } | |
3338 | ||
3339 | int journal_end(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3340 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3341 | { |
3342 | if (!current->journal_info && th->t_refcount > 1) | |
a9dd3643 | 3343 | reiserfs_warning(sb, "REISER-NESTING", |
45b03d5e | 3344 | "th NULL, refcount %d", th->t_refcount); |
bd4c625c LT |
3345 | |
3346 | if (!th->t_trans_id) { | |
3347 | WARN_ON(1); | |
3348 | return -EIO; | |
3349 | } | |
3350 | ||
3351 | th->t_refcount--; | |
3352 | if (th->t_refcount > 0) { | |
3353 | struct reiserfs_transaction_handle *cur_th = | |
3354 | current->journal_info; | |
3355 | ||
3356 | /* we aren't allowed to close a nested transaction on a different | |
3357 | ** filesystem from the one in the task struct | |
3358 | */ | |
14a61442 | 3359 | BUG_ON(cur_th->t_super != th->t_super); |
bd4c625c LT |
3360 | |
3361 | if (th != cur_th) { | |
3362 | memcpy(current->journal_info, th, sizeof(*th)); | |
3363 | th->t_trans_id = 0; | |
3364 | } | |
3365 | return 0; | |
3366 | } else { | |
a9dd3643 | 3367 | return do_journal_end(th, sb, nblocks, 0); |
bd4c625c | 3368 | } |
1da177e4 LT |
3369 | } |
3370 | ||
0222e657 | 3371 | /* removes from the current transaction, relsing and descrementing any counters. |
1da177e4 LT |
3372 | ** also files the removed buffer directly onto the clean list |
3373 | ** | |
3374 | ** called by journal_mark_freed when a block has been deleted | |
3375 | ** | |
3376 | ** returns 1 if it cleaned and relsed the buffer. 0 otherwise | |
3377 | */ | |
a9dd3643 | 3378 | static int remove_from_transaction(struct super_block *sb, |
bd4c625c LT |
3379 | b_blocknr_t blocknr, int already_cleaned) |
3380 | { | |
3381 | struct buffer_head *bh; | |
3382 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3383 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3384 | int ret = 0; |
3385 | ||
a9dd3643 | 3386 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3387 | if (!cn || !cn->bh) { |
3388 | return ret; | |
3389 | } | |
3390 | bh = cn->bh; | |
3391 | if (cn->prev) { | |
3392 | cn->prev->next = cn->next; | |
3393 | } | |
3394 | if (cn->next) { | |
3395 | cn->next->prev = cn->prev; | |
3396 | } | |
3397 | if (cn == journal->j_first) { | |
3398 | journal->j_first = cn->next; | |
3399 | } | |
3400 | if (cn == journal->j_last) { | |
3401 | journal->j_last = cn->prev; | |
3402 | } | |
3403 | if (bh) | |
a9dd3643 | 3404 | remove_journal_hash(sb, journal->j_hash_table, NULL, |
bd4c625c LT |
3405 | bh->b_blocknr, 0); |
3406 | clear_buffer_journaled(bh); /* don't log this one */ | |
3407 | ||
3408 | if (!already_cleaned) { | |
3409 | clear_buffer_journal_dirty(bh); | |
3410 | clear_buffer_dirty(bh); | |
3411 | clear_buffer_journal_test(bh); | |
3412 | put_bh(bh); | |
3413 | if (atomic_read(&(bh->b_count)) < 0) { | |
a9dd3643 | 3414 | reiserfs_warning(sb, "journal-1752", |
45b03d5e | 3415 | "b_count < 0"); |
bd4c625c LT |
3416 | } |
3417 | ret = 1; | |
3418 | } | |
3419 | journal->j_len--; | |
3420 | journal->j_len_alloc--; | |
a9dd3643 | 3421 | free_cnode(sb, cn); |
bd4c625c | 3422 | return ret; |
1da177e4 LT |
3423 | } |
3424 | ||
3425 | /* | |
3426 | ** for any cnode in a journal list, it can only be dirtied of all the | |
0779bf2d | 3427 | ** transactions that include it are committed to disk. |
1da177e4 LT |
3428 | ** this checks through each transaction, and returns 1 if you are allowed to dirty, |
3429 | ** and 0 if you aren't | |
3430 | ** | |
3431 | ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log | |
3432 | ** blocks for a given transaction on disk | |
3433 | ** | |
3434 | */ | |
bd4c625c LT |
3435 | static int can_dirty(struct reiserfs_journal_cnode *cn) |
3436 | { | |
3437 | struct super_block *sb = cn->sb; | |
3438 | b_blocknr_t blocknr = cn->blocknr; | |
3439 | struct reiserfs_journal_cnode *cur = cn->hprev; | |
3440 | int can_dirty = 1; | |
3441 | ||
3442 | /* first test hprev. These are all newer than cn, so any node here | |
3443 | ** with the same block number and dev means this node can't be sent | |
3444 | ** to disk right now. | |
3445 | */ | |
3446 | while (cur && can_dirty) { | |
3447 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && | |
3448 | cur->blocknr == blocknr) { | |
3449 | can_dirty = 0; | |
3450 | } | |
3451 | cur = cur->hprev; | |
3452 | } | |
3453 | /* then test hnext. These are all older than cn. As long as they | |
3454 | ** are committed to the log, it is safe to write cn to disk | |
3455 | */ | |
3456 | cur = cn->hnext; | |
3457 | while (cur && can_dirty) { | |
3458 | if (cur->jlist && cur->jlist->j_len > 0 && | |
3459 | atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && | |
3460 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { | |
3461 | can_dirty = 0; | |
3462 | } | |
3463 | cur = cur->hnext; | |
3464 | } | |
3465 | return can_dirty; | |
1da177e4 LT |
3466 | } |
3467 | ||
3468 | /* syncs the commit blocks, but does not force the real buffers to disk | |
0222e657 | 3469 | ** will wait until the current transaction is done/committed before returning |
1da177e4 | 3470 | */ |
bd4c625c | 3471 | int journal_end_sync(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3472 | struct super_block *sb, unsigned long nblocks) |
bd4c625c | 3473 | { |
a9dd3643 | 3474 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 3475 | |
bd4c625c LT |
3476 | BUG_ON(!th->t_trans_id); |
3477 | /* you can sync while nested, very, very bad */ | |
14a61442 | 3478 | BUG_ON(th->t_refcount > 1); |
bd4c625c | 3479 | if (journal->j_len == 0) { |
a9dd3643 | 3480 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3481 | 1); |
a9dd3643 | 3482 | journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3483 | } |
a9dd3643 | 3484 | return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT); |
1da177e4 LT |
3485 | } |
3486 | ||
3487 | /* | |
3488 | ** writeback the pending async commits to disk | |
3489 | */ | |
c4028958 | 3490 | static void flush_async_commits(struct work_struct *work) |
bd4c625c | 3491 | { |
c4028958 DH |
3492 | struct reiserfs_journal *journal = |
3493 | container_of(work, struct reiserfs_journal, j_work.work); | |
a9dd3643 | 3494 | struct super_block *sb = journal->j_work_sb; |
bd4c625c LT |
3495 | struct reiserfs_journal_list *jl; |
3496 | struct list_head *entry; | |
3497 | ||
8ebc4232 | 3498 | reiserfs_write_lock(sb); |
bd4c625c LT |
3499 | if (!list_empty(&journal->j_journal_list)) { |
3500 | /* last entry is the youngest, commit it and you get everything */ | |
3501 | entry = journal->j_journal_list.prev; | |
3502 | jl = JOURNAL_LIST_ENTRY(entry); | |
a9dd3643 | 3503 | flush_commit_list(sb, jl, 1); |
bd4c625c | 3504 | } |
8ebc4232 | 3505 | reiserfs_write_unlock(sb); |
1da177e4 LT |
3506 | } |
3507 | ||
3508 | /* | |
3509 | ** flushes any old transactions to disk | |
3510 | ** ends the current transaction if it is too old | |
3511 | */ | |
a9dd3643 | 3512 | int reiserfs_flush_old_commits(struct super_block *sb) |
bd4c625c LT |
3513 | { |
3514 | time_t now; | |
3515 | struct reiserfs_transaction_handle th; | |
a9dd3643 | 3516 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3517 | |
3518 | now = get_seconds(); | |
3519 | /* safety check so we don't flush while we are replaying the log during | |
3520 | * mount | |
3521 | */ | |
3522 | if (list_empty(&journal->j_journal_list)) { | |
3523 | return 0; | |
3524 | } | |
3525 | ||
3526 | /* check the current transaction. If there are no writers, and it is | |
3527 | * too old, finish it, and force the commit blocks to disk | |
3528 | */ | |
3529 | if (atomic_read(&journal->j_wcount) <= 0 && | |
3530 | journal->j_trans_start_time > 0 && | |
3531 | journal->j_len > 0 && | |
3532 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
a9dd3643 JM |
3533 | if (!journal_join(&th, sb, 1)) { |
3534 | reiserfs_prepare_for_journal(sb, | |
3535 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 3536 | 1); |
a9dd3643 JM |
3537 | journal_mark_dirty(&th, sb, |
3538 | SB_BUFFER_WITH_SB(sb)); | |
bd4c625c LT |
3539 | |
3540 | /* we're only being called from kreiserfsd, it makes no sense to do | |
3541 | ** an async commit so that kreiserfsd can do it later | |
3542 | */ | |
a9dd3643 | 3543 | do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT); |
bd4c625c LT |
3544 | } |
3545 | } | |
a9dd3643 | 3546 | return sb->s_dirt; |
1da177e4 LT |
3547 | } |
3548 | ||
3549 | /* | |
3550 | ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit | |
0222e657 JM |
3551 | ** |
3552 | ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all | |
1da177e4 LT |
3553 | ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just |
3554 | ** flushes the commit list and returns 0. | |
3555 | ** | |
3556 | ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. | |
0222e657 | 3557 | ** |
1da177e4 LT |
3558 | ** Note, we can't allow the journal_end to proceed while there are still writers in the log. |
3559 | */ | |
bd4c625c | 3560 | static int check_journal_end(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3561 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3562 | int flags) |
3563 | { | |
3564 | ||
3565 | time_t now; | |
3566 | int flush = flags & FLUSH_ALL; | |
3567 | int commit_now = flags & COMMIT_NOW; | |
3568 | int wait_on_commit = flags & WAIT; | |
3569 | struct reiserfs_journal_list *jl; | |
a9dd3643 | 3570 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3571 | |
3572 | BUG_ON(!th->t_trans_id); | |
3573 | ||
3574 | if (th->t_trans_id != journal->j_trans_id) { | |
c3a9c210 JM |
3575 | reiserfs_panic(th->t_super, "journal-1577", |
3576 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3577 | th->t_trans_id, journal->j_trans_id); |
3578 | } | |
3579 | ||
3580 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); | |
3581 | if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ | |
3582 | atomic_dec(&(journal->j_wcount)); | |
3583 | } | |
3584 | ||
0222e657 | 3585 | /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released |
bd4c625c LT |
3586 | ** will be dealt with by next transaction that actually writes something, but should be taken |
3587 | ** care of in this trans | |
3588 | */ | |
14a61442 ES |
3589 | BUG_ON(journal->j_len == 0); |
3590 | ||
bd4c625c LT |
3591 | /* if wcount > 0, and we are called to with flush or commit_now, |
3592 | ** we wait on j_join_wait. We will wake up when the last writer has | |
3593 | ** finished the transaction, and started it on its way to the disk. | |
0222e657 | 3594 | ** Then, we flush the commit or journal list, and just return 0 |
bd4c625c LT |
3595 | ** because the rest of journal end was already done for this transaction. |
3596 | */ | |
3597 | if (atomic_read(&(journal->j_wcount)) > 0) { | |
3598 | if (flush || commit_now) { | |
3599 | unsigned trans_id; | |
3600 | ||
3601 | jl = journal->j_current_jl; | |
3602 | trans_id = jl->j_trans_id; | |
3603 | if (wait_on_commit) | |
3604 | jl->j_state |= LIST_COMMIT_PENDING; | |
3605 | atomic_set(&(journal->j_jlock), 1); | |
3606 | if (flush) { | |
3607 | journal->j_next_full_flush = 1; | |
3608 | } | |
a9dd3643 | 3609 | unlock_journal(sb); |
bd4c625c LT |
3610 | |
3611 | /* sleep while the current transaction is still j_jlocked */ | |
3612 | while (journal->j_trans_id == trans_id) { | |
3613 | if (atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3614 | queue_log_writer(sb); |
bd4c625c | 3615 | } else { |
a9dd3643 | 3616 | lock_journal(sb); |
bd4c625c LT |
3617 | if (journal->j_trans_id == trans_id) { |
3618 | atomic_set(&(journal->j_jlock), | |
3619 | 1); | |
3620 | } | |
a9dd3643 | 3621 | unlock_journal(sb); |
bd4c625c LT |
3622 | } |
3623 | } | |
14a61442 ES |
3624 | BUG_ON(journal->j_trans_id == trans_id); |
3625 | ||
bd4c625c | 3626 | if (commit_now |
a9dd3643 | 3627 | && journal_list_still_alive(sb, trans_id) |
bd4c625c | 3628 | && wait_on_commit) { |
a9dd3643 | 3629 | flush_commit_list(sb, jl, 1); |
bd4c625c LT |
3630 | } |
3631 | return 0; | |
3632 | } | |
a9dd3643 | 3633 | unlock_journal(sb); |
bd4c625c LT |
3634 | return 0; |
3635 | } | |
3636 | ||
3637 | /* deal with old transactions where we are the last writers */ | |
3638 | now = get_seconds(); | |
3639 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
3640 | commit_now = 1; | |
3641 | journal->j_next_async_flush = 1; | |
3642 | } | |
3643 | /* don't batch when someone is waiting on j_join_wait */ | |
3644 | /* don't batch when syncing the commit or flushing the whole trans */ | |
3645 | if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) | |
3646 | && !flush && !commit_now && (journal->j_len < journal->j_max_batch) | |
3647 | && journal->j_len_alloc < journal->j_max_batch | |
3648 | && journal->j_cnode_free > (journal->j_trans_max * 3)) { | |
3649 | journal->j_bcount++; | |
a9dd3643 | 3650 | unlock_journal(sb); |
bd4c625c LT |
3651 | return 0; |
3652 | } | |
3653 | ||
a9dd3643 JM |
3654 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { |
3655 | reiserfs_panic(sb, "journal-003", | |
c3a9c210 | 3656 | "j_start (%ld) is too high", |
bd4c625c LT |
3657 | journal->j_start); |
3658 | } | |
3659 | return 1; | |
1da177e4 LT |
3660 | } |
3661 | ||
3662 | /* | |
3663 | ** Does all the work that makes deleting blocks safe. | |
3664 | ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. | |
0222e657 | 3665 | ** |
1da177e4 LT |
3666 | ** otherwise: |
3667 | ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes | |
3668 | ** before this transaction has finished. | |
3669 | ** | |
3670 | ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with | |
3671 | ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, | |
3672 | ** the block can't be reallocated yet. | |
3673 | ** | |
3674 | ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. | |
3675 | */ | |
bd4c625c | 3676 | int journal_mark_freed(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3677 | struct super_block *sb, b_blocknr_t blocknr) |
bd4c625c | 3678 | { |
a9dd3643 | 3679 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3680 | struct reiserfs_journal_cnode *cn = NULL; |
3681 | struct buffer_head *bh = NULL; | |
3682 | struct reiserfs_list_bitmap *jb = NULL; | |
3683 | int cleaned = 0; | |
3684 | BUG_ON(!th->t_trans_id); | |
3685 | ||
a9dd3643 | 3686 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3687 | if (cn && cn->bh) { |
3688 | bh = cn->bh; | |
3689 | get_bh(bh); | |
3690 | } | |
3691 | /* if it is journal new, we just remove it from this transaction */ | |
3692 | if (bh && buffer_journal_new(bh)) { | |
3693 | clear_buffer_journal_new(bh); | |
3694 | clear_prepared_bits(bh); | |
3695 | reiserfs_clean_and_file_buffer(bh); | |
a9dd3643 | 3696 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c LT |
3697 | } else { |
3698 | /* set the bit for this block in the journal bitmap for this transaction */ | |
3699 | jb = journal->j_current_jl->j_list_bitmap; | |
3700 | if (!jb) { | |
a9dd3643 | 3701 | reiserfs_panic(sb, "journal-1702", |
c3a9c210 | 3702 | "journal_list_bitmap is NULL"); |
bd4c625c | 3703 | } |
a9dd3643 | 3704 | set_bit_in_list_bitmap(sb, blocknr, jb); |
bd4c625c LT |
3705 | |
3706 | /* Note, the entire while loop is not allowed to schedule. */ | |
3707 | ||
3708 | if (bh) { | |
3709 | clear_prepared_bits(bh); | |
3710 | reiserfs_clean_and_file_buffer(bh); | |
3711 | } | |
a9dd3643 | 3712 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c LT |
3713 | |
3714 | /* find all older transactions with this block, make sure they don't try to write it out */ | |
a9dd3643 | 3715 | cn = get_journal_hash_dev(sb, journal->j_list_hash_table, |
bd4c625c LT |
3716 | blocknr); |
3717 | while (cn) { | |
a9dd3643 | 3718 | if (sb == cn->sb && blocknr == cn->blocknr) { |
bd4c625c LT |
3719 | set_bit(BLOCK_FREED, &cn->state); |
3720 | if (cn->bh) { | |
3721 | if (!cleaned) { | |
3722 | /* remove_from_transaction will brelse the buffer if it was | |
3723 | ** in the current trans | |
3724 | */ | |
3725 | clear_buffer_journal_dirty(cn-> | |
3726 | bh); | |
3727 | clear_buffer_dirty(cn->bh); | |
3728 | clear_buffer_journal_test(cn-> | |
3729 | bh); | |
3730 | cleaned = 1; | |
3731 | put_bh(cn->bh); | |
3732 | if (atomic_read | |
3733 | (&(cn->bh->b_count)) < 0) { | |
a9dd3643 | 3734 | reiserfs_warning(sb, |
45b03d5e JM |
3735 | "journal-2138", |
3736 | "cn->bh->b_count < 0"); | |
bd4c625c LT |
3737 | } |
3738 | } | |
3739 | if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ | |
3740 | atomic_dec(& | |
3741 | (cn->jlist-> | |
3742 | j_nonzerolen)); | |
3743 | } | |
3744 | cn->bh = NULL; | |
3745 | } | |
3746 | } | |
3747 | cn = cn->hnext; | |
3748 | } | |
3749 | } | |
3750 | ||
398c95bd CM |
3751 | if (bh) |
3752 | release_buffer_page(bh); /* get_hash grabs the buffer */ | |
bd4c625c LT |
3753 | return 0; |
3754 | } | |
3755 | ||
3756 | void reiserfs_update_inode_transaction(struct inode *inode) | |
3757 | { | |
3758 | struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); | |
3759 | REISERFS_I(inode)->i_jl = journal->j_current_jl; | |
3760 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id; | |
1da177e4 LT |
3761 | } |
3762 | ||
3763 | /* | |
3764 | * returns -1 on error, 0 if no commits/barriers were done and 1 | |
3765 | * if a transaction was actually committed and the barrier was done | |
3766 | */ | |
3767 | static int __commit_trans_jl(struct inode *inode, unsigned long id, | |
bd4c625c | 3768 | struct reiserfs_journal_list *jl) |
1da177e4 | 3769 | { |
bd4c625c LT |
3770 | struct reiserfs_transaction_handle th; |
3771 | struct super_block *sb = inode->i_sb; | |
3772 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
3773 | int ret = 0; | |
3774 | ||
3775 | /* is it from the current transaction, or from an unknown transaction? */ | |
3776 | if (id == journal->j_trans_id) { | |
3777 | jl = journal->j_current_jl; | |
3778 | /* try to let other writers come in and grow this transaction */ | |
3779 | let_transaction_grow(sb, id); | |
3780 | if (journal->j_trans_id != id) { | |
3781 | goto flush_commit_only; | |
3782 | } | |
1da177e4 | 3783 | |
bd4c625c LT |
3784 | ret = journal_begin(&th, sb, 1); |
3785 | if (ret) | |
3786 | return ret; | |
3787 | ||
3788 | /* someone might have ended this transaction while we joined */ | |
3789 | if (journal->j_trans_id != id) { | |
3790 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), | |
3791 | 1); | |
3792 | journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); | |
3793 | ret = journal_end(&th, sb, 1); | |
3794 | goto flush_commit_only; | |
3795 | } | |
1da177e4 | 3796 | |
bd4c625c LT |
3797 | ret = journal_end_sync(&th, sb, 1); |
3798 | if (!ret) | |
3799 | ret = 1; | |
1da177e4 | 3800 | |
bd4c625c LT |
3801 | } else { |
3802 | /* this gets tricky, we have to make sure the journal list in | |
3803 | * the inode still exists. We know the list is still around | |
3804 | * if we've got a larger transaction id than the oldest list | |
3805 | */ | |
3806 | flush_commit_only: | |
3807 | if (journal_list_still_alive(inode->i_sb, id)) { | |
3808 | /* | |
3809 | * we only set ret to 1 when we know for sure | |
3810 | * the barrier hasn't been started yet on the commit | |
3811 | * block. | |
3812 | */ | |
3813 | if (atomic_read(&jl->j_commit_left) > 1) | |
3814 | ret = 1; | |
3815 | flush_commit_list(sb, jl, 1); | |
3816 | if (journal->j_errno) | |
3817 | ret = journal->j_errno; | |
3818 | } | |
1da177e4 | 3819 | } |
bd4c625c LT |
3820 | /* otherwise the list is gone, and long since committed */ |
3821 | return ret; | |
3822 | } | |
1da177e4 | 3823 | |
bd4c625c LT |
3824 | int reiserfs_commit_for_inode(struct inode *inode) |
3825 | { | |
600ed416 | 3826 | unsigned int id = REISERFS_I(inode)->i_trans_id; |
bd4c625c | 3827 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; |
1da177e4 | 3828 | |
bd4c625c LT |
3829 | /* for the whole inode, assume unset id means it was |
3830 | * changed in the current transaction. More conservative | |
1da177e4 | 3831 | */ |
bd4c625c LT |
3832 | if (!id || !jl) { |
3833 | reiserfs_update_inode_transaction(inode); | |
3834 | id = REISERFS_I(inode)->i_trans_id; | |
3835 | /* jl will be updated in __commit_trans_jl */ | |
3836 | } | |
3837 | ||
3838 | return __commit_trans_jl(inode, id, jl); | |
3839 | } | |
3840 | ||
a9dd3643 | 3841 | void reiserfs_restore_prepared_buffer(struct super_block *sb, |
bd4c625c LT |
3842 | struct buffer_head *bh) |
3843 | { | |
a9dd3643 JM |
3844 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
3845 | PROC_INFO_INC(sb, journal.restore_prepared); | |
bd4c625c LT |
3846 | if (!bh) { |
3847 | return; | |
3848 | } | |
3849 | if (test_clear_buffer_journal_restore_dirty(bh) && | |
3850 | buffer_journal_dirty(bh)) { | |
3851 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3852 | cn = get_journal_hash_dev(sb, |
bd4c625c LT |
3853 | journal->j_list_hash_table, |
3854 | bh->b_blocknr); | |
3855 | if (cn && can_dirty(cn)) { | |
3856 | set_buffer_journal_test(bh); | |
3857 | mark_buffer_dirty(bh); | |
3858 | } | |
3859 | } | |
3860 | clear_buffer_journal_prepared(bh); | |
3861 | } | |
3862 | ||
3863 | extern struct tree_balance *cur_tb; | |
1da177e4 LT |
3864 | /* |
3865 | ** before we can change a metadata block, we have to make sure it won't | |
3866 | ** be written to disk while we are altering it. So, we must: | |
3867 | ** clean it | |
3868 | ** wait on it. | |
0222e657 | 3869 | ** |
1da177e4 | 3870 | */ |
a9dd3643 | 3871 | int reiserfs_prepare_for_journal(struct super_block *sb, |
bd4c625c LT |
3872 | struct buffer_head *bh, int wait) |
3873 | { | |
a9dd3643 | 3874 | PROC_INFO_INC(sb, journal.prepare); |
bd4c625c | 3875 | |
ca5de404 | 3876 | if (!trylock_buffer(bh)) { |
bd4c625c LT |
3877 | if (!wait) |
3878 | return 0; | |
3879 | lock_buffer(bh); | |
3880 | } | |
3881 | set_buffer_journal_prepared(bh); | |
3882 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { | |
3883 | clear_buffer_journal_test(bh); | |
3884 | set_buffer_journal_restore_dirty(bh); | |
3885 | } | |
3886 | unlock_buffer(bh); | |
3887 | return 1; | |
3888 | } | |
3889 | ||
3890 | static void flush_old_journal_lists(struct super_block *s) | |
3891 | { | |
3892 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
3893 | struct reiserfs_journal_list *jl; | |
3894 | struct list_head *entry; | |
3895 | time_t now = get_seconds(); | |
3896 | ||
3897 | while (!list_empty(&journal->j_journal_list)) { | |
3898 | entry = journal->j_journal_list.next; | |
3899 | jl = JOURNAL_LIST_ENTRY(entry); | |
3900 | /* this check should always be run, to send old lists to disk */ | |
a3172027 CM |
3901 | if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4)) && |
3902 | atomic_read(&jl->j_commit_left) == 0 && | |
3903 | test_transaction(s, jl)) { | |
bd4c625c LT |
3904 | flush_used_journal_lists(s, jl); |
3905 | } else { | |
3906 | break; | |
3907 | } | |
1da177e4 | 3908 | } |
1da177e4 LT |
3909 | } |
3910 | ||
0222e657 | 3911 | /* |
1da177e4 LT |
3912 | ** long and ugly. If flush, will not return until all commit |
3913 | ** blocks and all real buffers in the trans are on disk. | |
3914 | ** If no_async, won't return until all commit blocks are on disk. | |
3915 | ** | |
3916 | ** keep reading, there are comments as you go along | |
3917 | ** | |
3918 | ** If the journal is aborted, we just clean up. Things like flushing | |
3919 | ** journal lists, etc just won't happen. | |
3920 | */ | |
bd4c625c | 3921 | static int do_journal_end(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3922 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3923 | int flags) |
3924 | { | |
a9dd3643 | 3925 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3926 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; |
3927 | struct reiserfs_journal_cnode *last_cn = NULL; | |
3928 | struct reiserfs_journal_desc *desc; | |
3929 | struct reiserfs_journal_commit *commit; | |
3930 | struct buffer_head *c_bh; /* commit bh */ | |
3931 | struct buffer_head *d_bh; /* desc bh */ | |
3932 | int cur_write_start = 0; /* start index of current log write */ | |
3933 | int old_start; | |
3934 | int i; | |
a44c94a7 AZ |
3935 | int flush; |
3936 | int wait_on_commit; | |
bd4c625c LT |
3937 | struct reiserfs_journal_list *jl, *temp_jl; |
3938 | struct list_head *entry, *safe; | |
3939 | unsigned long jindex; | |
600ed416 | 3940 | unsigned int commit_trans_id; |
bd4c625c LT |
3941 | int trans_half; |
3942 | ||
3943 | BUG_ON(th->t_refcount > 1); | |
3944 | BUG_ON(!th->t_trans_id); | |
3945 | ||
a44c94a7 AZ |
3946 | /* protect flush_older_commits from doing mistakes if the |
3947 | transaction ID counter gets overflowed. */ | |
600ed416 | 3948 | if (th->t_trans_id == ~0U) |
a44c94a7 AZ |
3949 | flags |= FLUSH_ALL | COMMIT_NOW | WAIT; |
3950 | flush = flags & FLUSH_ALL; | |
3951 | wait_on_commit = flags & WAIT; | |
3952 | ||
bd4c625c | 3953 | current->journal_info = th->t_handle_save; |
a9dd3643 | 3954 | reiserfs_check_lock_depth(sb, "journal end"); |
bd4c625c | 3955 | if (journal->j_len == 0) { |
a9dd3643 | 3956 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3957 | 1); |
a9dd3643 | 3958 | journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3959 | } |
1da177e4 | 3960 | |
a9dd3643 | 3961 | lock_journal(sb); |
bd4c625c LT |
3962 | if (journal->j_next_full_flush) { |
3963 | flags |= FLUSH_ALL; | |
3964 | flush = 1; | |
3965 | } | |
3966 | if (journal->j_next_async_flush) { | |
3967 | flags |= COMMIT_NOW | WAIT; | |
3968 | wait_on_commit = 1; | |
3969 | } | |
3970 | ||
0222e657 | 3971 | /* check_journal_end locks the journal, and unlocks if it does not return 1 |
bd4c625c LT |
3972 | ** it tells us if we should continue with the journal_end, or just return |
3973 | */ | |
a9dd3643 JM |
3974 | if (!check_journal_end(th, sb, nblocks, flags)) { |
3975 | sb->s_dirt = 1; | |
3976 | wake_queued_writers(sb); | |
3977 | reiserfs_async_progress_wait(sb); | |
bd4c625c LT |
3978 | goto out; |
3979 | } | |
3980 | ||
3981 | /* check_journal_end might set these, check again */ | |
3982 | if (journal->j_next_full_flush) { | |
3983 | flush = 1; | |
3984 | } | |
3985 | ||
3986 | /* | |
3987 | ** j must wait means we have to flush the log blocks, and the real blocks for | |
3988 | ** this transaction | |
3989 | */ | |
3990 | if (journal->j_must_wait > 0) { | |
3991 | flush = 1; | |
3992 | } | |
1da177e4 | 3993 | #ifdef REISERFS_PREALLOCATE |
ef43bc4f JK |
3994 | /* quota ops might need to nest, setup the journal_info pointer for them |
3995 | * and raise the refcount so that it is > 0. */ | |
bd4c625c | 3996 | current->journal_info = th; |
ef43bc4f | 3997 | th->t_refcount++; |
bd4c625c LT |
3998 | reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into |
3999 | * the transaction */ | |
ef43bc4f | 4000 | th->t_refcount--; |
bd4c625c | 4001 | current->journal_info = th->t_handle_save; |
1da177e4 | 4002 | #endif |
bd4c625c LT |
4003 | |
4004 | /* setup description block */ | |
4005 | d_bh = | |
a9dd3643 JM |
4006 | journal_getblk(sb, |
4007 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4008 | journal->j_start); |
4009 | set_buffer_uptodate(d_bh); | |
4010 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; | |
4011 | memset(d_bh->b_data, 0, d_bh->b_size); | |
4012 | memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); | |
4013 | set_desc_trans_id(desc, journal->j_trans_id); | |
4014 | ||
4015 | /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ | |
a9dd3643 | 4016 | c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 4017 | ((journal->j_start + journal->j_len + |
a9dd3643 | 4018 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4019 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
4020 | memset(c_bh->b_data, 0, c_bh->b_size); | |
4021 | set_commit_trans_id(commit, journal->j_trans_id); | |
4022 | set_buffer_uptodate(c_bh); | |
4023 | ||
4024 | /* init this journal list */ | |
4025 | jl = journal->j_current_jl; | |
4026 | ||
4027 | /* we lock the commit before doing anything because | |
4028 | * we want to make sure nobody tries to run flush_commit_list until | |
4029 | * the new transaction is fully setup, and we've already flushed the | |
4030 | * ordered bh list | |
4031 | */ | |
8ebc4232 | 4032 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); |
bd4c625c LT |
4033 | |
4034 | /* save the transaction id in case we need to commit it later */ | |
4035 | commit_trans_id = jl->j_trans_id; | |
4036 | ||
4037 | atomic_set(&jl->j_older_commits_done, 0); | |
4038 | jl->j_trans_id = journal->j_trans_id; | |
4039 | jl->j_timestamp = journal->j_trans_start_time; | |
4040 | jl->j_commit_bh = c_bh; | |
4041 | jl->j_start = journal->j_start; | |
4042 | jl->j_len = journal->j_len; | |
4043 | atomic_set(&jl->j_nonzerolen, journal->j_len); | |
4044 | atomic_set(&jl->j_commit_left, journal->j_len + 2); | |
4045 | jl->j_realblock = NULL; | |
4046 | ||
4047 | /* The ENTIRE FOR LOOP MUST not cause schedule to occur. | |
4048 | ** for each real block, add it to the journal list hash, | |
4049 | ** copy into real block index array in the commit or desc block | |
4050 | */ | |
a9dd3643 | 4051 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
4052 | for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { |
4053 | if (buffer_journaled(cn->bh)) { | |
a9dd3643 | 4054 | jl_cn = get_cnode(sb); |
bd4c625c | 4055 | if (!jl_cn) { |
a9dd3643 | 4056 | reiserfs_panic(sb, "journal-1676", |
c3a9c210 | 4057 | "get_cnode returned NULL"); |
bd4c625c LT |
4058 | } |
4059 | if (i == 0) { | |
4060 | jl->j_realblock = jl_cn; | |
4061 | } | |
4062 | jl_cn->prev = last_cn; | |
4063 | jl_cn->next = NULL; | |
4064 | if (last_cn) { | |
4065 | last_cn->next = jl_cn; | |
4066 | } | |
4067 | last_cn = jl_cn; | |
0222e657 | 4068 | /* make sure the block we are trying to log is not a block |
bd4c625c LT |
4069 | of journal or reserved area */ |
4070 | ||
4071 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
4072 | (sb, cn->bh->b_blocknr)) { |
4073 | reiserfs_panic(sb, "journal-2332", | |
c3a9c210 JM |
4074 | "Trying to log block %lu, " |
4075 | "which is a log block", | |
bd4c625c LT |
4076 | cn->bh->b_blocknr); |
4077 | } | |
4078 | jl_cn->blocknr = cn->bh->b_blocknr; | |
4079 | jl_cn->state = 0; | |
a9dd3643 | 4080 | jl_cn->sb = sb; |
bd4c625c LT |
4081 | jl_cn->bh = cn->bh; |
4082 | jl_cn->jlist = jl; | |
4083 | insert_journal_hash(journal->j_list_hash_table, jl_cn); | |
4084 | if (i < trans_half) { | |
4085 | desc->j_realblock[i] = | |
4086 | cpu_to_le32(cn->bh->b_blocknr); | |
4087 | } else { | |
4088 | commit->j_realblock[i - trans_half] = | |
4089 | cpu_to_le32(cn->bh->b_blocknr); | |
4090 | } | |
4091 | } else { | |
4092 | i--; | |
4093 | } | |
4094 | } | |
4095 | set_desc_trans_len(desc, journal->j_len); | |
4096 | set_desc_mount_id(desc, journal->j_mount_id); | |
4097 | set_desc_trans_id(desc, journal->j_trans_id); | |
4098 | set_commit_trans_len(commit, journal->j_len); | |
4099 | ||
4100 | /* special check in case all buffers in the journal were marked for not logging */ | |
14a61442 | 4101 | BUG_ON(journal->j_len == 0); |
bd4c625c LT |
4102 | |
4103 | /* we're about to dirty all the log blocks, mark the description block | |
4104 | * dirty now too. Don't mark the commit block dirty until all the | |
4105 | * others are on disk | |
4106 | */ | |
4107 | mark_buffer_dirty(d_bh); | |
4108 | ||
4109 | /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ | |
4110 | cur_write_start = journal->j_start; | |
4111 | cn = journal->j_first; | |
4112 | jindex = 1; /* start at one so we don't get the desc again */ | |
4113 | while (cn) { | |
4114 | clear_buffer_journal_new(cn->bh); | |
4115 | /* copy all the real blocks into log area. dirty log blocks */ | |
4116 | if (buffer_journaled(cn->bh)) { | |
4117 | struct buffer_head *tmp_bh; | |
4118 | char *addr; | |
4119 | struct page *page; | |
4120 | tmp_bh = | |
a9dd3643 JM |
4121 | journal_getblk(sb, |
4122 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4123 | ((cur_write_start + |
4124 | jindex) % | |
a9dd3643 | 4125 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4126 | set_buffer_uptodate(tmp_bh); |
4127 | page = cn->bh->b_page; | |
4128 | addr = kmap(page); | |
4129 | memcpy(tmp_bh->b_data, | |
4130 | addr + offset_in_page(cn->bh->b_data), | |
4131 | cn->bh->b_size); | |
4132 | kunmap(page); | |
4133 | mark_buffer_dirty(tmp_bh); | |
4134 | jindex++; | |
4135 | set_buffer_journal_dirty(cn->bh); | |
4136 | clear_buffer_journaled(cn->bh); | |
4137 | } else { | |
4138 | /* JDirty cleared sometime during transaction. don't log this one */ | |
a9dd3643 | 4139 | reiserfs_warning(sb, "journal-2048", |
45b03d5e JM |
4140 | "BAD, buffer in journal hash, " |
4141 | "but not JDirty!"); | |
bd4c625c LT |
4142 | brelse(cn->bh); |
4143 | } | |
4144 | next = cn->next; | |
a9dd3643 | 4145 | free_cnode(sb, cn); |
bd4c625c | 4146 | cn = next; |
e6950a4d | 4147 | reiserfs_write_unlock(sb); |
bd4c625c | 4148 | cond_resched(); |
e6950a4d | 4149 | reiserfs_write_lock(sb); |
bd4c625c LT |
4150 | } |
4151 | ||
4152 | /* we are done with both the c_bh and d_bh, but | |
4153 | ** c_bh must be written after all other commit blocks, | |
4154 | ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. | |
4155 | */ | |
4156 | ||
a9dd3643 | 4157 | journal->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
4158 | |
4159 | /* now it is safe to insert this transaction on the main list */ | |
4160 | list_add_tail(&jl->j_list, &journal->j_journal_list); | |
4161 | list_add_tail(&jl->j_working_list, &journal->j_working_list); | |
4162 | journal->j_num_work_lists++; | |
4163 | ||
4164 | /* reset journal values for the next transaction */ | |
4165 | old_start = journal->j_start; | |
4166 | journal->j_start = | |
4167 | (journal->j_start + journal->j_len + | |
a9dd3643 | 4168 | 2) % SB_ONDISK_JOURNAL_SIZE(sb); |
bd4c625c LT |
4169 | atomic_set(&(journal->j_wcount), 0); |
4170 | journal->j_bcount = 0; | |
4171 | journal->j_last = NULL; | |
4172 | journal->j_first = NULL; | |
4173 | journal->j_len = 0; | |
4174 | journal->j_trans_start_time = 0; | |
a44c94a7 AZ |
4175 | /* check for trans_id overflow */ |
4176 | if (++journal->j_trans_id == 0) | |
4177 | journal->j_trans_id = 10; | |
bd4c625c LT |
4178 | journal->j_current_jl->j_trans_id = journal->j_trans_id; |
4179 | journal->j_must_wait = 0; | |
4180 | journal->j_len_alloc = 0; | |
4181 | journal->j_next_full_flush = 0; | |
4182 | journal->j_next_async_flush = 0; | |
a9dd3643 | 4183 | init_journal_hash(sb); |
bd4c625c LT |
4184 | |
4185 | // make sure reiserfs_add_jh sees the new current_jl before we | |
4186 | // write out the tails | |
4187 | smp_mb(); | |
4188 | ||
4189 | /* tail conversion targets have to hit the disk before we end the | |
4190 | * transaction. Otherwise a later transaction might repack the tail | |
4191 | * before this transaction commits, leaving the data block unflushed and | |
4192 | * clean, if we crash before the later transaction commits, the data block | |
4193 | * is lost. | |
4194 | */ | |
4195 | if (!list_empty(&jl->j_tail_bh_list)) { | |
8ebc4232 | 4196 | reiserfs_write_unlock(sb); |
bd4c625c LT |
4197 | write_ordered_buffers(&journal->j_dirty_buffers_lock, |
4198 | journal, jl, &jl->j_tail_bh_list); | |
8ebc4232 | 4199 | reiserfs_write_lock(sb); |
bd4c625c | 4200 | } |
14a61442 | 4201 | BUG_ON(!list_empty(&jl->j_tail_bh_list)); |
90415dea | 4202 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
4203 | |
4204 | /* honor the flush wishes from the caller, simple commits can | |
4205 | ** be done outside the journal lock, they are done below | |
4206 | ** | |
4207 | ** if we don't flush the commit list right now, we put it into | |
4208 | ** the work queue so the people waiting on the async progress work | |
4209 | ** queue don't wait for this proc to flush journal lists and such. | |
4210 | */ | |
4211 | if (flush) { | |
a9dd3643 JM |
4212 | flush_commit_list(sb, jl, 1); |
4213 | flush_journal_list(sb, jl, 1); | |
bd4c625c LT |
4214 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) |
4215 | queue_delayed_work(commit_wq, &journal->j_work, HZ / 10); | |
4216 | ||
0222e657 JM |
4217 | /* if the next transaction has any chance of wrapping, flush |
4218 | ** transactions that might get overwritten. If any journal lists are very | |
4219 | ** old flush them as well. | |
bd4c625c LT |
4220 | */ |
4221 | first_jl: | |
4222 | list_for_each_safe(entry, safe, &journal->j_journal_list) { | |
4223 | temp_jl = JOURNAL_LIST_ENTRY(entry); | |
4224 | if (journal->j_start <= temp_jl->j_start) { | |
4225 | if ((journal->j_start + journal->j_trans_max + 1) >= | |
4226 | temp_jl->j_start) { | |
a9dd3643 | 4227 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4228 | goto first_jl; |
4229 | } else if ((journal->j_start + | |
4230 | journal->j_trans_max + 1) < | |
a9dd3643 | 4231 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c LT |
4232 | /* if we don't cross into the next transaction and we don't |
4233 | * wrap, there is no way we can overlap any later transactions | |
4234 | * break now | |
4235 | */ | |
4236 | break; | |
4237 | } | |
4238 | } else if ((journal->j_start + | |
4239 | journal->j_trans_max + 1) > | |
a9dd3643 | 4240 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c | 4241 | if (((journal->j_start + journal->j_trans_max + 1) % |
a9dd3643 | 4242 | SB_ONDISK_JOURNAL_SIZE(sb)) >= |
bd4c625c | 4243 | temp_jl->j_start) { |
a9dd3643 | 4244 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4245 | goto first_jl; |
4246 | } else { | |
4247 | /* we don't overlap anything from out start to the end of the | |
4248 | * log, and our wrapped portion doesn't overlap anything at | |
4249 | * the start of the log. We can break | |
4250 | */ | |
4251 | break; | |
4252 | } | |
4253 | } | |
4254 | } | |
a9dd3643 | 4255 | flush_old_journal_lists(sb); |
bd4c625c LT |
4256 | |
4257 | journal->j_current_jl->j_list_bitmap = | |
a9dd3643 | 4258 | get_list_bitmap(sb, journal->j_current_jl); |
bd4c625c LT |
4259 | |
4260 | if (!(journal->j_current_jl->j_list_bitmap)) { | |
a9dd3643 | 4261 | reiserfs_panic(sb, "journal-1996", |
c3a9c210 | 4262 | "could not get a list bitmap"); |
bd4c625c LT |
4263 | } |
4264 | ||
4265 | atomic_set(&(journal->j_jlock), 0); | |
a9dd3643 | 4266 | unlock_journal(sb); |
bd4c625c LT |
4267 | /* wake up any body waiting to join. */ |
4268 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); | |
4269 | wake_up(&(journal->j_join_wait)); | |
4270 | ||
4271 | if (!flush && wait_on_commit && | |
a9dd3643 JM |
4272 | journal_list_still_alive(sb, commit_trans_id)) { |
4273 | flush_commit_list(sb, jl, 1); | |
bd4c625c LT |
4274 | } |
4275 | out: | |
a9dd3643 | 4276 | reiserfs_check_lock_depth(sb, "journal end2"); |
bd4c625c LT |
4277 | |
4278 | memset(th, 0, sizeof(*th)); | |
4279 | /* Re-set th->t_super, so we can properly keep track of how many | |
4280 | * persistent transactions there are. We need to do this so if this | |
4281 | * call is part of a failed restart_transaction, we can free it later */ | |
a9dd3643 | 4282 | th->t_super = sb; |
bd4c625c LT |
4283 | |
4284 | return journal->j_errno; | |
4285 | } | |
4286 | ||
32e8b106 JM |
4287 | /* Send the file system read only and refuse new transactions */ |
4288 | void reiserfs_abort_journal(struct super_block *sb, int errno) | |
bd4c625c LT |
4289 | { |
4290 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
4291 | if (test_bit(J_ABORTED, &journal->j_state)) | |
4292 | return; | |
4293 | ||
32e8b106 JM |
4294 | if (!journal->j_errno) |
4295 | journal->j_errno = errno; | |
bd4c625c LT |
4296 | |
4297 | sb->s_flags |= MS_RDONLY; | |
4298 | set_bit(J_ABORTED, &journal->j_state); | |
1da177e4 LT |
4299 | |
4300 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 4301 | dump_stack(); |
1da177e4 LT |
4302 | #endif |
4303 | } |