Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
098297b2 JM |
2 | * Write ahead logging implementation copyright Chris Mason 2000 |
3 | * | |
4 | * The background commits make this code very interrelated, and | |
5 | * overly complex. I need to rethink things a bit....The major players: | |
6 | * | |
7 | * journal_begin -- call with the number of blocks you expect to log. | |
8 | * If the current transaction is too | |
9 | * old, it will block until the current transaction is | |
10 | * finished, and then start a new one. | |
11 | * Usually, your transaction will get joined in with | |
12 | * previous ones for speed. | |
13 | * | |
14 | * journal_join -- same as journal_begin, but won't block on the current | |
15 | * transaction regardless of age. Don't ever call | |
16 | * this. Ever. There are only two places it should be | |
17 | * called from, and they are both inside this file. | |
18 | * | |
19 | * journal_mark_dirty -- adds blocks into this transaction. clears any flags | |
20 | * that might make them get sent to disk | |
21 | * and then marks them BH_JDirty. Puts the buffer head | |
22 | * into the current transaction hash. | |
23 | * | |
24 | * journal_end -- if the current transaction is batchable, it does nothing | |
25 | * otherwise, it could do an async/synchronous commit, or | |
26 | * a full flush of all log and real blocks in the | |
27 | * transaction. | |
28 | * | |
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 | |
32 | * around too long. | |
33 | * -- Note, if you call this as an immediate flush from | |
34 | * from within kupdate, it will ignore the immediate flag | |
35 | */ | |
1da177e4 | 36 | |
1da177e4 | 37 | #include <linux/time.h> |
6188e10d | 38 | #include <linux/semaphore.h> |
1da177e4 | 39 | #include <linux/vmalloc.h> |
f466c6fd | 40 | #include "reiserfs.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 | 53 | |
1da177e4 | 54 | |
1da177e4 LT |
55 | /* gets a struct reiserfs_journal_list * from a list head */ |
56 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
57 | j_list)) | |
58 | #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
59 | j_working_list)) | |
60 | ||
098297b2 JM |
61 | /* must be correct to keep the desc and commit structs at 4k */ |
62 | #define JOURNAL_TRANS_HALF 1018 | |
bd4c625c | 63 | #define BUFNR 64 /*read ahead */ |
1da177e4 LT |
64 | |
65 | /* cnode stat bits. Move these into reiserfs_fs.h */ | |
66 | ||
098297b2 JM |
67 | /* this block was freed, and can't be written. */ |
68 | #define BLOCK_FREED 2 | |
69 | /* this block was freed during this transaction, and can't be written */ | |
70 | #define BLOCK_FREED_HOLDER 3 | |
1da177e4 | 71 | |
098297b2 JM |
72 | /* used in flush_journal_list */ |
73 | #define BLOCK_NEEDS_FLUSH 4 | |
1da177e4 LT |
74 | #define BLOCK_DIRTIED 5 |
75 | ||
1da177e4 LT |
76 | /* journal list state bits */ |
77 | #define LIST_TOUCHED 1 | |
78 | #define LIST_DIRTY 2 | |
bd4c625c | 79 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ |
1da177e4 LT |
80 | |
81 | /* flags for do_journal_end */ | |
82 | #define FLUSH_ALL 1 /* flush commit and real blocks */ | |
83 | #define COMMIT_NOW 2 /* end and commit this transaction */ | |
bd4c625c LT |
84 | #define WAIT 4 /* wait for the log blocks to hit the disk */ |
85 | ||
58d85426 | 86 | static int do_journal_end(struct reiserfs_transaction_handle *, int flags); |
bd4c625c LT |
87 | static int flush_journal_list(struct super_block *s, |
88 | struct reiserfs_journal_list *jl, int flushall); | |
89 | static int flush_commit_list(struct super_block *s, | |
90 | struct reiserfs_journal_list *jl, int flushall); | |
91 | static int can_dirty(struct reiserfs_journal_cnode *cn); | |
92 | static int journal_join(struct reiserfs_transaction_handle *th, | |
b491dd17 | 93 | struct super_block *sb); |
4385bab1 | 94 | static void release_journal_dev(struct super_block *super, |
bd4c625c | 95 | struct reiserfs_journal *journal); |
1da177e4 | 96 | static int dirty_one_transaction(struct super_block *s, |
bd4c625c | 97 | struct reiserfs_journal_list *jl); |
c4028958 | 98 | static void flush_async_commits(struct work_struct *work); |
1da177e4 LT |
99 | static void queue_log_writer(struct super_block *s); |
100 | ||
101 | /* values for join in do_journal_begin_r */ | |
102 | enum { | |
bd4c625c | 103 | JBEGIN_REG = 0, /* regular journal begin */ |
098297b2 JM |
104 | /* join the running transaction if at all possible */ |
105 | JBEGIN_JOIN = 1, | |
106 | /* called from cleanup code, ignores aborted flag */ | |
107 | JBEGIN_ABORT = 2, | |
1da177e4 LT |
108 | }; |
109 | ||
110 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 111 | struct super_block *sb, |
bd4c625c | 112 | unsigned long nblocks, int join); |
1da177e4 | 113 | |
a9dd3643 | 114 | static void init_journal_hash(struct super_block *sb) |
bd4c625c | 115 | { |
a9dd3643 | 116 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
117 | memset(journal->j_hash_table, 0, |
118 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
1da177e4 LT |
119 | } |
120 | ||
121 | /* | |
098297b2 JM |
122 | * clears BH_Dirty and sticks the buffer on the clean list. Called because |
123 | * I can't allow refile_buffer to make schedule happen after I've freed a | |
124 | * block. Look at remove_from_transaction and journal_mark_freed for | |
125 | * more details. | |
126 | */ | |
bd4c625c LT |
127 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) |
128 | { | |
129 | if (bh) { | |
130 | clear_buffer_dirty(bh); | |
131 | clear_buffer_journal_test(bh); | |
132 | } | |
133 | return 0; | |
1da177e4 LT |
134 | } |
135 | ||
bd4c625c | 136 | static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block |
a9dd3643 | 137 | *sb) |
bd4c625c LT |
138 | { |
139 | struct reiserfs_bitmap_node *bn; | |
140 | static int id; | |
141 | ||
d739b42b | 142 | bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); |
bd4c625c LT |
143 | if (!bn) { |
144 | return NULL; | |
145 | } | |
a9dd3643 | 146 | bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); |
bd4c625c | 147 | if (!bn->data) { |
d739b42b | 148 | kfree(bn); |
bd4c625c LT |
149 | return NULL; |
150 | } | |
151 | bn->id = id++; | |
bd4c625c LT |
152 | INIT_LIST_HEAD(&bn->list); |
153 | return bn; | |
154 | } | |
155 | ||
a9dd3643 | 156 | static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) |
bd4c625c | 157 | { |
a9dd3643 | 158 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
159 | struct reiserfs_bitmap_node *bn = NULL; |
160 | struct list_head *entry = journal->j_bitmap_nodes.next; | |
161 | ||
162 | journal->j_used_bitmap_nodes++; | |
cf776a7a | 163 | repeat: |
bd4c625c LT |
164 | |
165 | if (entry != &journal->j_bitmap_nodes) { | |
166 | bn = list_entry(entry, struct reiserfs_bitmap_node, list); | |
167 | list_del(entry); | |
a9dd3643 | 168 | memset(bn->data, 0, sb->s_blocksize); |
bd4c625c LT |
169 | journal->j_free_bitmap_nodes--; |
170 | return bn; | |
171 | } | |
a9dd3643 | 172 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
173 | if (!bn) { |
174 | yield(); | |
175 | goto repeat; | |
176 | } | |
177 | return bn; | |
1da177e4 | 178 | } |
a9dd3643 | 179 | static inline void free_bitmap_node(struct super_block *sb, |
bd4c625c LT |
180 | struct reiserfs_bitmap_node *bn) |
181 | { | |
a9dd3643 | 182 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
183 | journal->j_used_bitmap_nodes--; |
184 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { | |
d739b42b PE |
185 | kfree(bn->data); |
186 | kfree(bn); | |
bd4c625c LT |
187 | } else { |
188 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
189 | journal->j_free_bitmap_nodes++; | |
190 | } | |
191 | } | |
192 | ||
a9dd3643 | 193 | static void allocate_bitmap_nodes(struct super_block *sb) |
bd4c625c LT |
194 | { |
195 | int i; | |
a9dd3643 | 196 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
197 | struct reiserfs_bitmap_node *bn = NULL; |
198 | for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { | |
a9dd3643 | 199 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
200 | if (bn) { |
201 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
202 | journal->j_free_bitmap_nodes++; | |
203 | } else { | |
098297b2 JM |
204 | /* this is ok, we'll try again when more are needed */ |
205 | break; | |
bd4c625c LT |
206 | } |
207 | } | |
1da177e4 LT |
208 | } |
209 | ||
a9dd3643 | 210 | static int set_bit_in_list_bitmap(struct super_block *sb, |
3ee16670 | 211 | b_blocknr_t block, |
bd4c625c LT |
212 | struct reiserfs_list_bitmap *jb) |
213 | { | |
a9dd3643 JM |
214 | unsigned int bmap_nr = block / (sb->s_blocksize << 3); |
215 | unsigned int bit_nr = block % (sb->s_blocksize << 3); | |
1da177e4 | 216 | |
bd4c625c | 217 | if (!jb->bitmaps[bmap_nr]) { |
a9dd3643 | 218 | jb->bitmaps[bmap_nr] = get_bitmap_node(sb); |
bd4c625c LT |
219 | } |
220 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); | |
221 | return 0; | |
1da177e4 LT |
222 | } |
223 | ||
a9dd3643 | 224 | static void cleanup_bitmap_list(struct super_block *sb, |
bd4c625c LT |
225 | struct reiserfs_list_bitmap *jb) |
226 | { | |
227 | int i; | |
228 | if (jb->bitmaps == NULL) | |
229 | return; | |
230 | ||
a9dd3643 | 231 | for (i = 0; i < reiserfs_bmap_count(sb); i++) { |
bd4c625c | 232 | if (jb->bitmaps[i]) { |
a9dd3643 | 233 | free_bitmap_node(sb, jb->bitmaps[i]); |
bd4c625c LT |
234 | jb->bitmaps[i] = NULL; |
235 | } | |
236 | } | |
1da177e4 LT |
237 | } |
238 | ||
239 | /* | |
098297b2 JM |
240 | * only call this on FS unmount. |
241 | */ | |
a9dd3643 | 242 | static int free_list_bitmaps(struct super_block *sb, |
bd4c625c LT |
243 | struct reiserfs_list_bitmap *jb_array) |
244 | { | |
245 | int i; | |
246 | struct reiserfs_list_bitmap *jb; | |
247 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
248 | jb = jb_array + i; | |
249 | jb->journal_list = NULL; | |
a9dd3643 | 250 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
251 | vfree(jb->bitmaps); |
252 | jb->bitmaps = NULL; | |
253 | } | |
254 | return 0; | |
255 | } | |
256 | ||
a9dd3643 | 257 | static int free_bitmap_nodes(struct super_block *sb) |
bd4c625c | 258 | { |
a9dd3643 | 259 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
260 | struct list_head *next = journal->j_bitmap_nodes.next; |
261 | struct reiserfs_bitmap_node *bn; | |
262 | ||
263 | while (next != &journal->j_bitmap_nodes) { | |
264 | bn = list_entry(next, struct reiserfs_bitmap_node, list); | |
265 | list_del(next); | |
d739b42b PE |
266 | kfree(bn->data); |
267 | kfree(bn); | |
bd4c625c LT |
268 | next = journal->j_bitmap_nodes.next; |
269 | journal->j_free_bitmap_nodes--; | |
270 | } | |
271 | ||
272 | return 0; | |
1da177e4 LT |
273 | } |
274 | ||
275 | /* | |
098297b2 JM |
276 | * get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. |
277 | * jb_array is the array to be filled in. | |
278 | */ | |
a9dd3643 | 279 | int reiserfs_allocate_list_bitmaps(struct super_block *sb, |
bd4c625c | 280 | struct reiserfs_list_bitmap *jb_array, |
3ee16670 | 281 | unsigned int bmap_nr) |
bd4c625c LT |
282 | { |
283 | int i; | |
284 | int failed = 0; | |
285 | struct reiserfs_list_bitmap *jb; | |
286 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); | |
287 | ||
288 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
289 | jb = jb_array + i; | |
290 | jb->journal_list = NULL; | |
558feb08 | 291 | jb->bitmaps = vzalloc(mem); |
bd4c625c | 292 | if (!jb->bitmaps) { |
a9dd3643 | 293 | reiserfs_warning(sb, "clm-2000", "unable to " |
45b03d5e | 294 | "allocate bitmaps for journal lists"); |
bd4c625c LT |
295 | failed = 1; |
296 | break; | |
297 | } | |
bd4c625c LT |
298 | } |
299 | if (failed) { | |
a9dd3643 | 300 | free_list_bitmaps(sb, jb_array); |
bd4c625c LT |
301 | return -1; |
302 | } | |
303 | return 0; | |
1da177e4 LT |
304 | } |
305 | ||
306 | /* | |
098297b2 JM |
307 | * find an available list bitmap. If you can't find one, flush a commit list |
308 | * and try again | |
309 | */ | |
a9dd3643 | 310 | static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, |
bd4c625c LT |
311 | struct reiserfs_journal_list |
312 | *jl) | |
313 | { | |
314 | int i, j; | |
a9dd3643 | 315 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
316 | struct reiserfs_list_bitmap *jb = NULL; |
317 | ||
318 | for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { | |
319 | i = journal->j_list_bitmap_index; | |
320 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; | |
321 | jb = journal->j_list_bitmap + i; | |
322 | if (journal->j_list_bitmap[i].journal_list) { | |
a9dd3643 | 323 | flush_commit_list(sb, |
bd4c625c LT |
324 | journal->j_list_bitmap[i]. |
325 | journal_list, 1); | |
326 | if (!journal->j_list_bitmap[i].journal_list) { | |
327 | break; | |
328 | } | |
329 | } else { | |
330 | break; | |
331 | } | |
332 | } | |
098297b2 JM |
333 | /* double check to make sure if flushed correctly */ |
334 | if (jb->journal_list) | |
bd4c625c | 335 | return NULL; |
bd4c625c LT |
336 | jb->journal_list = jl; |
337 | return jb; | |
1da177e4 LT |
338 | } |
339 | ||
0222e657 | 340 | /* |
098297b2 JM |
341 | * allocates a new chunk of X nodes, and links them all together as a list. |
342 | * Uses the cnode->next and cnode->prev pointers | |
343 | * returns NULL on failure | |
344 | */ | |
bd4c625c LT |
345 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) |
346 | { | |
347 | struct reiserfs_journal_cnode *head; | |
348 | int i; | |
349 | if (num_cnodes <= 0) { | |
350 | return NULL; | |
351 | } | |
558feb08 | 352 | head = vzalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); |
bd4c625c LT |
353 | if (!head) { |
354 | return NULL; | |
355 | } | |
bd4c625c LT |
356 | head[0].prev = NULL; |
357 | head[0].next = head + 1; | |
358 | for (i = 1; i < num_cnodes; i++) { | |
359 | head[i].prev = head + (i - 1); | |
360 | head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ | |
361 | } | |
362 | head[num_cnodes - 1].next = NULL; | |
363 | return head; | |
1da177e4 LT |
364 | } |
365 | ||
098297b2 | 366 | /* pulls a cnode off the free list, or returns NULL on failure */ |
a9dd3643 | 367 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) |
bd4c625c LT |
368 | { |
369 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 370 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 371 | |
a9dd3643 | 372 | reiserfs_check_lock_depth(sb, "get_cnode"); |
bd4c625c LT |
373 | |
374 | if (journal->j_cnode_free <= 0) { | |
375 | return NULL; | |
376 | } | |
377 | journal->j_cnode_used++; | |
378 | journal->j_cnode_free--; | |
379 | cn = journal->j_cnode_free_list; | |
380 | if (!cn) { | |
381 | return cn; | |
382 | } | |
383 | if (cn->next) { | |
384 | cn->next->prev = NULL; | |
385 | } | |
386 | journal->j_cnode_free_list = cn->next; | |
387 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); | |
388 | return cn; | |
1da177e4 LT |
389 | } |
390 | ||
391 | /* | |
098297b2 JM |
392 | * returns a cnode to the free list |
393 | */ | |
a9dd3643 | 394 | static void free_cnode(struct super_block *sb, |
bd4c625c LT |
395 | struct reiserfs_journal_cnode *cn) |
396 | { | |
a9dd3643 | 397 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 398 | |
a9dd3643 | 399 | reiserfs_check_lock_depth(sb, "free_cnode"); |
1da177e4 | 400 | |
bd4c625c LT |
401 | journal->j_cnode_used--; |
402 | journal->j_cnode_free++; | |
403 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ | |
404 | cn->next = journal->j_cnode_free_list; | |
405 | if (journal->j_cnode_free_list) { | |
406 | journal->j_cnode_free_list->prev = cn; | |
407 | } | |
408 | cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ | |
409 | journal->j_cnode_free_list = cn; | |
1da177e4 LT |
410 | } |
411 | ||
bd4c625c LT |
412 | static void clear_prepared_bits(struct buffer_head *bh) |
413 | { | |
414 | clear_buffer_journal_prepared(bh); | |
415 | clear_buffer_journal_restore_dirty(bh); | |
1da177e4 LT |
416 | } |
417 | ||
098297b2 JM |
418 | /* |
419 | * return a cnode with same dev, block number and size in table, | |
420 | * or null if not found | |
421 | */ | |
bd4c625c LT |
422 | static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct |
423 | super_block | |
424 | *sb, | |
425 | struct | |
426 | reiserfs_journal_cnode | |
427 | **table, | |
428 | long bl) | |
1da177e4 | 429 | { |
bd4c625c LT |
430 | struct reiserfs_journal_cnode *cn; |
431 | cn = journal_hash(table, sb, bl); | |
432 | while (cn) { | |
433 | if (cn->blocknr == bl && cn->sb == sb) | |
434 | return cn; | |
435 | cn = cn->hnext; | |
436 | } | |
437 | return (struct reiserfs_journal_cnode *)0; | |
1da177e4 LT |
438 | } |
439 | ||
440 | /* | |
098297b2 JM |
441 | * this actually means 'can this block be reallocated yet?'. If you set |
442 | * search_all, a block can only be allocated if it is not in the current | |
443 | * transaction, was not freed by the current transaction, and has no chance | |
444 | * of ever being overwritten by a replay after crashing. | |
445 | * | |
446 | * If you don't set search_all, a block can only be allocated if it is not | |
447 | * in the current transaction. Since deleting a block removes it from the | |
448 | * current transaction, this case should never happen. If you don't set | |
449 | * search_all, make 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 | |
454 | * that 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 | */ | |
a9dd3643 | 459 | int reiserfs_in_journal(struct super_block *sb, |
3ee16670 | 460 | unsigned int bmap_nr, int bit_nr, int search_all, |
bd4c625c LT |
461 | b_blocknr_t * next_zero_bit) |
462 | { | |
a9dd3643 | 463 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
464 | struct reiserfs_journal_cnode *cn; |
465 | struct reiserfs_list_bitmap *jb; | |
466 | int i; | |
467 | unsigned long bl; | |
468 | ||
469 | *next_zero_bit = 0; /* always start this at zero. */ | |
470 | ||
a9dd3643 | 471 | PROC_INFO_INC(sb, journal.in_journal); |
098297b2 JM |
472 | /* |
473 | * If we aren't doing a search_all, this is a metablock, and it | |
474 | * will be logged before use. if we crash before the transaction | |
475 | * that freed it commits, this transaction won't have committed | |
476 | * either, and the block will never be written | |
bd4c625c LT |
477 | */ |
478 | if (search_all) { | |
479 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
a9dd3643 | 480 | PROC_INFO_INC(sb, journal.in_journal_bitmap); |
bd4c625c LT |
481 | jb = journal->j_list_bitmap + i; |
482 | if (jb->journal_list && jb->bitmaps[bmap_nr] && | |
483 | test_bit(bit_nr, | |
484 | (unsigned long *)jb->bitmaps[bmap_nr]-> | |
485 | data)) { | |
486 | *next_zero_bit = | |
487 | find_next_zero_bit((unsigned long *) | |
488 | (jb->bitmaps[bmap_nr]-> | |
489 | data), | |
a9dd3643 | 490 | sb->s_blocksize << 3, |
bd4c625c LT |
491 | bit_nr + 1); |
492 | return 1; | |
493 | } | |
494 | } | |
495 | } | |
496 | ||
a9dd3643 | 497 | bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; |
bd4c625c LT |
498 | /* is it in any old transactions? */ |
499 | if (search_all | |
500 | && (cn = | |
a9dd3643 | 501 | get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { |
bd4c625c LT |
502 | return 1; |
503 | } | |
504 | ||
505 | /* is it in the current transaction. This should never happen */ | |
a9dd3643 | 506 | if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) { |
bd4c625c LT |
507 | BUG(); |
508 | return 1; | |
509 | } | |
510 | ||
a9dd3643 | 511 | PROC_INFO_INC(sb, journal.in_journal_reusable); |
bd4c625c LT |
512 | /* safe for reuse */ |
513 | return 0; | |
1da177e4 LT |
514 | } |
515 | ||
098297b2 | 516 | /* insert cn into table */ |
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 | /* | |
098297b2 JM |
562 | * this used to be much more involved, and I'm keeping it just in case |
563 | * things get ugly again. it gets called by flush_commit_list, and | |
564 | * cleans up any data stored about blocks freed during a 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; | |
54cc6cea | 702 | if (lock) { |
bd4c625c | 703 | spin_unlock(lock); |
54cc6cea | 704 | fn(chunk); |
bd4c625c | 705 | spin_lock(lock); |
54cc6cea FF |
706 | } else { |
707 | fn(chunk); | |
708 | } | |
bd4c625c LT |
709 | } |
710 | return ret; | |
1da177e4 LT |
711 | } |
712 | ||
1da177e4 | 713 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); |
bd4c625c LT |
714 | static struct reiserfs_jh *alloc_jh(void) |
715 | { | |
716 | struct reiserfs_jh *jh; | |
717 | while (1) { | |
718 | jh = kmalloc(sizeof(*jh), GFP_NOFS); | |
719 | if (jh) { | |
720 | atomic_inc(&nr_reiserfs_jh); | |
721 | return jh; | |
722 | } | |
723 | yield(); | |
1da177e4 | 724 | } |
1da177e4 LT |
725 | } |
726 | ||
727 | /* | |
728 | * we want to free the jh when the buffer has been written | |
729 | * and waited on | |
730 | */ | |
bd4c625c LT |
731 | void reiserfs_free_jh(struct buffer_head *bh) |
732 | { | |
733 | struct reiserfs_jh *jh; | |
734 | ||
735 | jh = bh->b_private; | |
736 | if (jh) { | |
737 | bh->b_private = NULL; | |
738 | jh->bh = NULL; | |
739 | list_del_init(&jh->list); | |
740 | kfree(jh); | |
741 | if (atomic_read(&nr_reiserfs_jh) <= 0) | |
742 | BUG(); | |
743 | atomic_dec(&nr_reiserfs_jh); | |
744 | put_bh(bh); | |
745 | } | |
1da177e4 LT |
746 | } |
747 | ||
748 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, | |
bd4c625c | 749 | int tail) |
1da177e4 | 750 | { |
bd4c625c | 751 | struct reiserfs_jh *jh; |
1da177e4 | 752 | |
bd4c625c LT |
753 | if (bh->b_private) { |
754 | spin_lock(&j->j_dirty_buffers_lock); | |
755 | if (!bh->b_private) { | |
756 | spin_unlock(&j->j_dirty_buffers_lock); | |
757 | goto no_jh; | |
758 | } | |
759 | jh = bh->b_private; | |
760 | list_del_init(&jh->list); | |
761 | } else { | |
cf776a7a | 762 | no_jh: |
bd4c625c LT |
763 | get_bh(bh); |
764 | jh = alloc_jh(); | |
765 | spin_lock(&j->j_dirty_buffers_lock); | |
098297b2 JM |
766 | /* |
767 | * buffer must be locked for __add_jh, should be able to have | |
bd4c625c LT |
768 | * two adds at the same time |
769 | */ | |
14a61442 | 770 | BUG_ON(bh->b_private); |
bd4c625c LT |
771 | jh->bh = bh; |
772 | bh->b_private = jh; | |
1da177e4 | 773 | } |
bd4c625c LT |
774 | jh->jl = j->j_current_jl; |
775 | if (tail) | |
776 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); | |
777 | else { | |
778 | list_add_tail(&jh->list, &jh->jl->j_bh_list); | |
779 | } | |
780 | spin_unlock(&j->j_dirty_buffers_lock); | |
781 | return 0; | |
1da177e4 LT |
782 | } |
783 | ||
bd4c625c LT |
784 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) |
785 | { | |
786 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); | |
1da177e4 | 787 | } |
bd4c625c LT |
788 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) |
789 | { | |
790 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); | |
1da177e4 LT |
791 | } |
792 | ||
793 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) | |
bd4c625c | 794 | static int write_ordered_buffers(spinlock_t * lock, |
1da177e4 | 795 | struct reiserfs_journal *j, |
bd4c625c | 796 | struct reiserfs_journal_list *jl, |
1da177e4 LT |
797 | struct list_head *list) |
798 | { | |
bd4c625c LT |
799 | struct buffer_head *bh; |
800 | struct reiserfs_jh *jh; | |
801 | int ret = j->j_errno; | |
802 | struct buffer_chunk chunk; | |
803 | struct list_head tmp; | |
804 | INIT_LIST_HEAD(&tmp); | |
805 | ||
806 | chunk.nr = 0; | |
807 | spin_lock(lock); | |
808 | while (!list_empty(list)) { | |
809 | jh = JH_ENTRY(list->next); | |
810 | bh = jh->bh; | |
811 | get_bh(bh); | |
ca5de404 | 812 | if (!trylock_buffer(bh)) { |
bd4c625c | 813 | if (!buffer_dirty(bh)) { |
f116629d | 814 | list_move(&jh->list, &tmp); |
bd4c625c LT |
815 | goto loop_next; |
816 | } | |
817 | spin_unlock(lock); | |
818 | if (chunk.nr) | |
819 | write_ordered_chunk(&chunk); | |
820 | wait_on_buffer(bh); | |
821 | cond_resched(); | |
822 | spin_lock(lock); | |
823 | goto loop_next; | |
824 | } | |
098297b2 JM |
825 | /* |
826 | * in theory, dirty non-uptodate buffers should never get here, | |
3d4492f8 CM |
827 | * but the upper layer io error paths still have a few quirks. |
828 | * Handle them here as gracefully as we can | |
829 | */ | |
830 | if (!buffer_uptodate(bh) && buffer_dirty(bh)) { | |
831 | clear_buffer_dirty(bh); | |
832 | ret = -EIO; | |
833 | } | |
bd4c625c | 834 | if (buffer_dirty(bh)) { |
f116629d | 835 | list_move(&jh->list, &tmp); |
bd4c625c LT |
836 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); |
837 | } else { | |
838 | reiserfs_free_jh(bh); | |
839 | unlock_buffer(bh); | |
840 | } | |
cf776a7a | 841 | loop_next: |
bd4c625c LT |
842 | put_bh(bh); |
843 | cond_resched_lock(lock); | |
844 | } | |
845 | if (chunk.nr) { | |
846 | spin_unlock(lock); | |
1da177e4 | 847 | write_ordered_chunk(&chunk); |
bd4c625c | 848 | spin_lock(lock); |
1da177e4 | 849 | } |
bd4c625c LT |
850 | while (!list_empty(&tmp)) { |
851 | jh = JH_ENTRY(tmp.prev); | |
852 | bh = jh->bh; | |
853 | get_bh(bh); | |
854 | reiserfs_free_jh(bh); | |
855 | ||
856 | if (buffer_locked(bh)) { | |
857 | spin_unlock(lock); | |
858 | wait_on_buffer(bh); | |
859 | spin_lock(lock); | |
860 | } | |
861 | if (!buffer_uptodate(bh)) { | |
862 | ret = -EIO; | |
863 | } | |
098297b2 JM |
864 | /* |
865 | * ugly interaction with invalidatepage here. | |
866 | * reiserfs_invalidate_page will pin any buffer that has a | |
867 | * valid journal head from an older transaction. If someone | |
868 | * else sets our buffer dirty after we write it in the first | |
869 | * loop, and then someone truncates the page away, nobody | |
870 | * will ever write the buffer. We're safe if we write the | |
871 | * page one last time after freeing the journal header. | |
d62b1b87 CM |
872 | */ |
873 | if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { | |
874 | spin_unlock(lock); | |
875 | ll_rw_block(WRITE, 1, &bh); | |
876 | spin_lock(lock); | |
877 | } | |
bd4c625c LT |
878 | put_bh(bh); |
879 | cond_resched_lock(lock); | |
1da177e4 | 880 | } |
bd4c625c LT |
881 | spin_unlock(lock); |
882 | return ret; | |
883 | } | |
1da177e4 | 884 | |
bd4c625c LT |
885 | static int flush_older_commits(struct super_block *s, |
886 | struct reiserfs_journal_list *jl) | |
887 | { | |
888 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
889 | struct reiserfs_journal_list *other_jl; | |
890 | struct reiserfs_journal_list *first_jl; | |
891 | struct list_head *entry; | |
600ed416 JM |
892 | unsigned int trans_id = jl->j_trans_id; |
893 | unsigned int other_trans_id; | |
894 | unsigned int first_trans_id; | |
bd4c625c | 895 | |
cf776a7a | 896 | find_first: |
bd4c625c LT |
897 | /* |
898 | * first we walk backwards to find the oldest uncommitted transation | |
899 | */ | |
900 | first_jl = jl; | |
901 | entry = jl->j_list.prev; | |
902 | while (1) { | |
903 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
904 | if (entry == &journal->j_journal_list || | |
905 | atomic_read(&other_jl->j_older_commits_done)) | |
906 | break; | |
1da177e4 | 907 | |
bd4c625c LT |
908 | first_jl = other_jl; |
909 | entry = other_jl->j_list.prev; | |
910 | } | |
1da177e4 | 911 | |
bd4c625c LT |
912 | /* if we didn't find any older uncommitted transactions, return now */ |
913 | if (first_jl == jl) { | |
914 | return 0; | |
915 | } | |
1da177e4 | 916 | |
bd4c625c LT |
917 | first_trans_id = first_jl->j_trans_id; |
918 | ||
919 | entry = &first_jl->j_list; | |
920 | while (1) { | |
921 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
922 | other_trans_id = other_jl->j_trans_id; | |
923 | ||
924 | if (other_trans_id < trans_id) { | |
925 | if (atomic_read(&other_jl->j_commit_left) != 0) { | |
926 | flush_commit_list(s, other_jl, 0); | |
927 | ||
928 | /* list we were called with is gone, return */ | |
929 | if (!journal_list_still_alive(s, trans_id)) | |
930 | return 1; | |
931 | ||
098297b2 JM |
932 | /* |
933 | * the one we just flushed is gone, this means | |
934 | * all older lists are also gone, so first_jl | |
935 | * is no longer valid either. Go back to the | |
936 | * beginning. | |
bd4c625c LT |
937 | */ |
938 | if (!journal_list_still_alive | |
939 | (s, other_trans_id)) { | |
940 | goto find_first; | |
941 | } | |
942 | } | |
943 | entry = entry->next; | |
944 | if (entry == &journal->j_journal_list) | |
945 | return 0; | |
946 | } else { | |
947 | return 0; | |
1da177e4 | 948 | } |
1da177e4 | 949 | } |
bd4c625c | 950 | return 0; |
1da177e4 | 951 | } |
deba0f49 AB |
952 | |
953 | static int reiserfs_async_progress_wait(struct super_block *s) | |
bd4c625c | 954 | { |
bd4c625c | 955 | struct reiserfs_journal *j = SB_JOURNAL(s); |
8ebc4232 FW |
956 | |
957 | if (atomic_read(&j->j_async_throttle)) { | |
278f6679 JM |
958 | int depth; |
959 | ||
960 | depth = reiserfs_write_unlock_nested(s); | |
8aa7e847 | 961 | congestion_wait(BLK_RW_ASYNC, HZ / 10); |
278f6679 | 962 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 FW |
963 | } |
964 | ||
bd4c625c | 965 | return 0; |
1da177e4 LT |
966 | } |
967 | ||
968 | /* | |
098297b2 JM |
969 | * if this journal list still has commit blocks unflushed, send them to disk. |
970 | * | |
971 | * log areas must be flushed in order (transaction 2 can't commit before | |
972 | * transaction 1) Before the commit block can by written, every other log | |
973 | * block must be safely on disk | |
974 | */ | |
bd4c625c LT |
975 | static int flush_commit_list(struct super_block *s, |
976 | struct reiserfs_journal_list *jl, int flushall) | |
977 | { | |
978 | int i; | |
3ee16670 | 979 | b_blocknr_t bn; |
bd4c625c | 980 | struct buffer_head *tbh = NULL; |
600ed416 | 981 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 982 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
bd4c625c | 983 | int retval = 0; |
e0e851cf | 984 | int write_len; |
278f6679 | 985 | int depth; |
bd4c625c LT |
986 | |
987 | reiserfs_check_lock_depth(s, "flush_commit_list"); | |
988 | ||
989 | if (atomic_read(&jl->j_older_commits_done)) { | |
990 | return 0; | |
991 | } | |
992 | ||
098297b2 JM |
993 | /* |
994 | * before we can put our commit blocks on disk, we have to make | |
995 | * sure everyone older than us is on disk too | |
bd4c625c LT |
996 | */ |
997 | BUG_ON(jl->j_len <= 0); | |
998 | BUG_ON(trans_id == journal->j_trans_id); | |
999 | ||
1000 | get_journal_list(jl); | |
1001 | if (flushall) { | |
1002 | if (flush_older_commits(s, jl) == 1) { | |
098297b2 JM |
1003 | /* |
1004 | * list disappeared during flush_older_commits. | |
1005 | * return | |
1006 | */ | |
bd4c625c LT |
1007 | goto put_jl; |
1008 | } | |
1009 | } | |
1010 | ||
1011 | /* make sure nobody is trying to flush this one at the same time */ | |
8ebc4232 FW |
1012 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); |
1013 | ||
bd4c625c | 1014 | if (!journal_list_still_alive(s, trans_id)) { |
90415dea | 1015 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1016 | goto put_jl; |
1017 | } | |
1018 | BUG_ON(jl->j_trans_id == 0); | |
1019 | ||
1020 | /* this commit is done, exit */ | |
a228bf8f | 1021 | if (atomic_read(&jl->j_commit_left) <= 0) { |
bd4c625c | 1022 | if (flushall) { |
a228bf8f | 1023 | atomic_set(&jl->j_older_commits_done, 1); |
bd4c625c | 1024 | } |
90415dea | 1025 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1026 | goto put_jl; |
1027 | } | |
1028 | ||
1029 | if (!list_empty(&jl->j_bh_list)) { | |
3d4492f8 | 1030 | int ret; |
8ebc4232 FW |
1031 | |
1032 | /* | |
1033 | * We might sleep in numerous places inside | |
1034 | * write_ordered_buffers. Relax the write lock. | |
1035 | */ | |
278f6679 | 1036 | depth = reiserfs_write_unlock_nested(s); |
3d4492f8 CM |
1037 | ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, |
1038 | journal, jl, &jl->j_bh_list); | |
1039 | if (ret < 0 && retval == 0) | |
1040 | retval = ret; | |
278f6679 | 1041 | reiserfs_write_lock_nested(s, depth); |
bd4c625c LT |
1042 | } |
1043 | BUG_ON(!list_empty(&jl->j_bh_list)); | |
1044 | /* | |
1045 | * for the description block and all the log blocks, submit any buffers | |
e0e851cf CM |
1046 | * that haven't already reached the disk. Try to write at least 256 |
1047 | * log blocks. later on, we will only wait on blocks that correspond | |
1048 | * to this transaction, but while we're unplugging we might as well | |
1049 | * get a chunk of data on there. | |
bd4c625c LT |
1050 | */ |
1051 | atomic_inc(&journal->j_async_throttle); | |
e0e851cf CM |
1052 | write_len = jl->j_len + 1; |
1053 | if (write_len < 256) | |
1054 | write_len = 256; | |
1055 | for (i = 0 ; i < write_len ; i++) { | |
bd4c625c LT |
1056 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % |
1057 | SB_ONDISK_JOURNAL_SIZE(s); | |
1058 | tbh = journal_find_get_block(s, bn); | |
e0e851cf | 1059 | if (tbh) { |
6e3647ac | 1060 | if (buffer_dirty(tbh)) { |
278f6679 | 1061 | depth = reiserfs_write_unlock_nested(s); |
6e3647ac | 1062 | ll_rw_block(WRITE, 1, &tbh); |
278f6679 | 1063 | reiserfs_write_lock_nested(s, depth); |
6e3647ac | 1064 | } |
e0e851cf CM |
1065 | put_bh(tbh) ; |
1066 | } | |
bd4c625c LT |
1067 | } |
1068 | atomic_dec(&journal->j_async_throttle); | |
1069 | ||
bd4c625c LT |
1070 | for (i = 0; i < (jl->j_len + 1); i++) { |
1071 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + | |
1072 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); | |
1073 | tbh = journal_find_get_block(s, bn); | |
8ebc4232 | 1074 | |
278f6679 JM |
1075 | depth = reiserfs_write_unlock_nested(s); |
1076 | __wait_on_buffer(tbh); | |
1077 | reiserfs_write_lock_nested(s, depth); | |
098297b2 JM |
1078 | /* |
1079 | * since we're using ll_rw_blk above, it might have skipped | |
1080 | * over a locked buffer. Double check here | |
1081 | */ | |
8ebc4232 FW |
1082 | /* redundant, sync_dirty_buffer() checks */ |
1083 | if (buffer_dirty(tbh)) { | |
278f6679 | 1084 | depth = reiserfs_write_unlock_nested(s); |
bd4c625c | 1085 | sync_dirty_buffer(tbh); |
278f6679 | 1086 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 1087 | } |
bd4c625c | 1088 | if (unlikely(!buffer_uptodate(tbh))) { |
1da177e4 | 1089 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1090 | reiserfs_warning(s, "journal-601", |
1091 | "buffer write failed"); | |
1da177e4 | 1092 | #endif |
bd4c625c LT |
1093 | retval = -EIO; |
1094 | } | |
098297b2 JM |
1095 | /* once for journal_find_get_block */ |
1096 | put_bh(tbh); | |
1097 | /* once due to original getblk in do_journal_end */ | |
1098 | put_bh(tbh); | |
a228bf8f | 1099 | atomic_dec(&jl->j_commit_left); |
bd4c625c LT |
1100 | } |
1101 | ||
a228bf8f | 1102 | BUG_ON(atomic_read(&jl->j_commit_left) != 1); |
bd4c625c | 1103 | |
098297b2 JM |
1104 | /* |
1105 | * If there was a write error in the journal - we can't commit | |
7cd33ad2 CH |
1106 | * this transaction - it will be invalid and, if successful, |
1107 | * will just end up propagating the write error out to | |
098297b2 JM |
1108 | * the file system. |
1109 | */ | |
7cd33ad2 CH |
1110 | if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { |
1111 | if (buffer_dirty(jl->j_commit_bh)) | |
1112 | BUG(); | |
1113 | mark_buffer_dirty(jl->j_commit_bh) ; | |
278f6679 | 1114 | depth = reiserfs_write_unlock_nested(s); |
7cd33ad2 CH |
1115 | if (reiserfs_barrier_flush(s)) |
1116 | __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); | |
1117 | else | |
1118 | sync_dirty_buffer(jl->j_commit_bh); | |
278f6679 | 1119 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 1120 | } |
bd4c625c | 1121 | |
098297b2 JM |
1122 | /* |
1123 | * If there was a write error in the journal - we can't commit this | |
bd4c625c | 1124 | * transaction - it will be invalid and, if successful, will just end |
098297b2 JM |
1125 | * up propagating the write error out to the filesystem. |
1126 | */ | |
bd4c625c | 1127 | if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { |
1da177e4 | 1128 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e | 1129 | reiserfs_warning(s, "journal-615", "buffer write failed"); |
1da177e4 | 1130 | #endif |
bd4c625c LT |
1131 | retval = -EIO; |
1132 | } | |
1133 | bforget(jl->j_commit_bh); | |
1134 | if (journal->j_last_commit_id != 0 && | |
1135 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { | |
45b03d5e | 1136 | reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", |
bd4c625c LT |
1137 | journal->j_last_commit_id, jl->j_trans_id); |
1138 | } | |
1139 | journal->j_last_commit_id = jl->j_trans_id; | |
1140 | ||
098297b2 JM |
1141 | /* |
1142 | * now, every commit block is on the disk. It is safe to allow | |
1143 | * blocks freed during this transaction to be reallocated | |
1144 | */ | |
bd4c625c LT |
1145 | cleanup_freed_for_journal_list(s, jl); |
1146 | ||
1147 | retval = retval ? retval : journal->j_errno; | |
1148 | ||
1149 | /* mark the metadata dirty */ | |
1150 | if (!retval) | |
1151 | dirty_one_transaction(s, jl); | |
a228bf8f | 1152 | atomic_dec(&jl->j_commit_left); |
bd4c625c LT |
1153 | |
1154 | if (flushall) { | |
a228bf8f | 1155 | atomic_set(&jl->j_older_commits_done, 1); |
bd4c625c | 1156 | } |
90415dea | 1157 | mutex_unlock(&jl->j_commit_mutex); |
cf776a7a | 1158 | put_jl: |
bd4c625c LT |
1159 | put_journal_list(s, jl); |
1160 | ||
1161 | if (retval) | |
1162 | reiserfs_abort(s, retval, "Journal write error in %s", | |
fbe5498b | 1163 | __func__); |
bd4c625c | 1164 | return retval; |
1da177e4 LT |
1165 | } |
1166 | ||
1167 | /* | |
098297b2 JM |
1168 | * flush_journal_list frequently needs to find a newer transaction for a |
1169 | * given block. This does that, or returns NULL if it can't find anything | |
1170 | */ | |
bd4c625c LT |
1171 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct |
1172 | reiserfs_journal_cnode | |
1173 | *cn) | |
1174 | { | |
1175 | struct super_block *sb = cn->sb; | |
1176 | b_blocknr_t blocknr = cn->blocknr; | |
1da177e4 | 1177 | |
bd4c625c LT |
1178 | cn = cn->hprev; |
1179 | while (cn) { | |
1180 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { | |
1181 | return cn->jlist; | |
1182 | } | |
1183 | cn = cn->hprev; | |
1184 | } | |
1185 | return NULL; | |
1da177e4 LT |
1186 | } |
1187 | ||
bd4c625c LT |
1188 | static void remove_journal_hash(struct super_block *, |
1189 | struct reiserfs_journal_cnode **, | |
1190 | struct reiserfs_journal_list *, unsigned long, | |
1191 | int); | |
1da177e4 LT |
1192 | |
1193 | /* | |
098297b2 JM |
1194 | * once all the real blocks have been flushed, it is safe to remove them |
1195 | * from the journal list for this transaction. Aside from freeing the | |
1196 | * cnode, this also allows the block to be reallocated for data blocks | |
1197 | * if it had been deleted. | |
1198 | */ | |
a9dd3643 | 1199 | static void remove_all_from_journal_list(struct super_block *sb, |
bd4c625c LT |
1200 | struct reiserfs_journal_list *jl, |
1201 | int debug) | |
1202 | { | |
a9dd3643 | 1203 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1204 | struct reiserfs_journal_cnode *cn, *last; |
1205 | cn = jl->j_realblock; | |
1206 | ||
098297b2 JM |
1207 | /* |
1208 | * which is better, to lock once around the whole loop, or | |
1209 | * to lock for each call to remove_journal_hash? | |
bd4c625c LT |
1210 | */ |
1211 | while (cn) { | |
1212 | if (cn->blocknr != 0) { | |
1213 | if (debug) { | |
a9dd3643 | 1214 | reiserfs_warning(sb, "reiserfs-2201", |
bd4c625c LT |
1215 | "block %u, bh is %d, state %ld", |
1216 | cn->blocknr, cn->bh ? 1 : 0, | |
1217 | cn->state); | |
1218 | } | |
1219 | cn->state = 0; | |
a9dd3643 | 1220 | remove_journal_hash(sb, journal->j_list_hash_table, |
bd4c625c LT |
1221 | jl, cn->blocknr, 1); |
1222 | } | |
1223 | last = cn; | |
1224 | cn = cn->next; | |
a9dd3643 | 1225 | free_cnode(sb, last); |
bd4c625c LT |
1226 | } |
1227 | jl->j_realblock = NULL; | |
1da177e4 LT |
1228 | } |
1229 | ||
1230 | /* | |
098297b2 JM |
1231 | * if this timestamp is greater than the timestamp we wrote last to the |
1232 | * header block, write it to the header block. once this is done, I can | |
1233 | * safely say the log area for this transaction won't ever be replayed, | |
1234 | * and I can start releasing blocks in this transaction for reuse as data | |
1235 | * blocks. called by flush_journal_list, before it calls | |
1236 | * remove_all_from_journal_list | |
1237 | */ | |
a9dd3643 | 1238 | static int _update_journal_header_block(struct super_block *sb, |
bd4c625c | 1239 | unsigned long offset, |
600ed416 | 1240 | unsigned int trans_id) |
bd4c625c LT |
1241 | { |
1242 | struct reiserfs_journal_header *jh; | |
a9dd3643 | 1243 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
278f6679 | 1244 | int depth; |
1da177e4 | 1245 | |
bd4c625c LT |
1246 | if (reiserfs_is_journal_aborted(journal)) |
1247 | return -EIO; | |
1da177e4 | 1248 | |
bd4c625c LT |
1249 | if (trans_id >= journal->j_last_flush_trans_id) { |
1250 | if (buffer_locked((journal->j_header_bh))) { | |
278f6679 JM |
1251 | depth = reiserfs_write_unlock_nested(sb); |
1252 | __wait_on_buffer(journal->j_header_bh); | |
1253 | reiserfs_write_lock_nested(sb, depth); | |
bd4c625c | 1254 | if (unlikely(!buffer_uptodate(journal->j_header_bh))) { |
1da177e4 | 1255 | #ifdef CONFIG_REISERFS_CHECK |
a9dd3643 | 1256 | reiserfs_warning(sb, "journal-699", |
45b03d5e | 1257 | "buffer write failed"); |
1da177e4 | 1258 | #endif |
bd4c625c LT |
1259 | return -EIO; |
1260 | } | |
1261 | } | |
1262 | journal->j_last_flush_trans_id = trans_id; | |
1263 | journal->j_first_unflushed_offset = offset; | |
1264 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> | |
1265 | b_data); | |
1266 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id); | |
1267 | jh->j_first_unflushed_offset = cpu_to_le32(offset); | |
1268 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id); | |
1269 | ||
7cd33ad2 | 1270 | set_buffer_dirty(journal->j_header_bh); |
278f6679 | 1271 | depth = reiserfs_write_unlock_nested(sb); |
7cd33ad2 CH |
1272 | |
1273 | if (reiserfs_barrier_flush(sb)) | |
1274 | __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); | |
1275 | else | |
bd4c625c | 1276 | sync_dirty_buffer(journal->j_header_bh); |
7cd33ad2 | 1277 | |
278f6679 | 1278 | reiserfs_write_lock_nested(sb, depth); |
bd4c625c | 1279 | if (!buffer_uptodate(journal->j_header_bh)) { |
a9dd3643 | 1280 | reiserfs_warning(sb, "journal-837", |
45b03d5e | 1281 | "IO error during journal replay"); |
bd4c625c LT |
1282 | return -EIO; |
1283 | } | |
1284 | } | |
1285 | return 0; | |
1286 | } | |
1287 | ||
a9dd3643 | 1288 | static int update_journal_header_block(struct super_block *sb, |
bd4c625c | 1289 | unsigned long offset, |
600ed416 | 1290 | unsigned int trans_id) |
bd4c625c | 1291 | { |
a9dd3643 | 1292 | return _update_journal_header_block(sb, offset, trans_id); |
1da177e4 | 1293 | } |
bd4c625c | 1294 | |
0222e657 JM |
1295 | /* |
1296 | ** flush any and all journal lists older than you are | |
1da177e4 LT |
1297 | ** can only be called from flush_journal_list |
1298 | */ | |
a9dd3643 | 1299 | static int flush_older_journal_lists(struct super_block *sb, |
bd4c625c LT |
1300 | struct reiserfs_journal_list *jl) |
1301 | { | |
1302 | struct list_head *entry; | |
1303 | struct reiserfs_journal_list *other_jl; | |
a9dd3643 | 1304 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
600ed416 | 1305 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 1306 | |
098297b2 JM |
1307 | /* |
1308 | * we know we are the only ones flushing things, no extra race | |
bd4c625c LT |
1309 | * protection is required. |
1310 | */ | |
cf776a7a | 1311 | restart: |
bd4c625c LT |
1312 | entry = journal->j_journal_list.next; |
1313 | /* Did we wrap? */ | |
1314 | if (entry == &journal->j_journal_list) | |
1315 | return 0; | |
1316 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
1317 | if (other_jl->j_trans_id < trans_id) { | |
1318 | BUG_ON(other_jl->j_refcount <= 0); | |
1319 | /* do not flush all */ | |
a9dd3643 | 1320 | flush_journal_list(sb, other_jl, 0); |
bd4c625c LT |
1321 | |
1322 | /* other_jl is now deleted from the list */ | |
1323 | goto restart; | |
1324 | } | |
1325 | return 0; | |
1da177e4 LT |
1326 | } |
1327 | ||
1328 | static void del_from_work_list(struct super_block *s, | |
bd4c625c LT |
1329 | struct reiserfs_journal_list *jl) |
1330 | { | |
1331 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1332 | if (!list_empty(&jl->j_working_list)) { | |
1333 | list_del_init(&jl->j_working_list); | |
1334 | journal->j_num_work_lists--; | |
1335 | } | |
1da177e4 LT |
1336 | } |
1337 | ||
098297b2 JM |
1338 | /* |
1339 | * flush a journal list, both commit and real blocks | |
1340 | * | |
1341 | * always set flushall to 1, unless you are calling from inside | |
1342 | * flush_journal_list | |
1343 | * | |
1344 | * IMPORTANT. This can only be called while there are no journal writers, | |
1345 | * and the journal is locked. That means it can only be called from | |
1346 | * do_journal_end, or by journal_release | |
1347 | */ | |
bd4c625c LT |
1348 | static int flush_journal_list(struct super_block *s, |
1349 | struct reiserfs_journal_list *jl, int flushall) | |
1da177e4 | 1350 | { |
bd4c625c LT |
1351 | struct reiserfs_journal_list *pjl; |
1352 | struct reiserfs_journal_cnode *cn, *last; | |
1353 | int count; | |
1354 | int was_jwait = 0; | |
1355 | int was_dirty = 0; | |
1356 | struct buffer_head *saved_bh; | |
1357 | unsigned long j_len_saved = jl->j_len; | |
1358 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1359 | int err = 0; | |
278f6679 | 1360 | int depth; |
bd4c625c LT |
1361 | |
1362 | BUG_ON(j_len_saved <= 0); | |
1363 | ||
1364 | if (atomic_read(&journal->j_wcount) != 0) { | |
45b03d5e | 1365 | reiserfs_warning(s, "clm-2048", "called with wcount %d", |
bd4c625c LT |
1366 | atomic_read(&journal->j_wcount)); |
1367 | } | |
1da177e4 | 1368 | |
bd4c625c LT |
1369 | /* if flushall == 0, the lock is already held */ |
1370 | if (flushall) { | |
8ebc4232 | 1371 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
afe70259 | 1372 | } else if (mutex_trylock(&journal->j_flush_mutex)) { |
bd4c625c LT |
1373 | BUG(); |
1374 | } | |
1da177e4 | 1375 | |
bd4c625c LT |
1376 | count = 0; |
1377 | if (j_len_saved > journal->j_trans_max) { | |
c3a9c210 | 1378 | reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", |
bd4c625c LT |
1379 | j_len_saved, jl->j_trans_id); |
1380 | return 0; | |
1381 | } | |
1da177e4 | 1382 | |
bd4c625c | 1383 | /* if all the work is already done, get out of here */ |
a228bf8f JM |
1384 | if (atomic_read(&jl->j_nonzerolen) <= 0 && |
1385 | atomic_read(&jl->j_commit_left) <= 0) { | |
bd4c625c LT |
1386 | goto flush_older_and_return; |
1387 | } | |
1388 | ||
098297b2 JM |
1389 | /* |
1390 | * start by putting the commit list on disk. This will also flush | |
1391 | * the commit lists of any olders transactions | |
bd4c625c LT |
1392 | */ |
1393 | flush_commit_list(s, jl, 1); | |
1394 | ||
1395 | if (!(jl->j_state & LIST_DIRTY) | |
1396 | && !reiserfs_is_journal_aborted(journal)) | |
1397 | BUG(); | |
1398 | ||
1399 | /* are we done now? */ | |
a228bf8f JM |
1400 | if (atomic_read(&jl->j_nonzerolen) <= 0 && |
1401 | atomic_read(&jl->j_commit_left) <= 0) { | |
bd4c625c LT |
1402 | goto flush_older_and_return; |
1403 | } | |
1404 | ||
098297b2 JM |
1405 | /* |
1406 | * loop through each cnode, see if we need to write it, | |
1407 | * or wait on a more recent transaction, or just ignore it | |
bd4c625c | 1408 | */ |
a228bf8f | 1409 | if (atomic_read(&journal->j_wcount) != 0) { |
c3a9c210 JM |
1410 | reiserfs_panic(s, "journal-844", "journal list is flushing, " |
1411 | "wcount is not 0"); | |
bd4c625c LT |
1412 | } |
1413 | cn = jl->j_realblock; | |
1414 | while (cn) { | |
1415 | was_jwait = 0; | |
1416 | was_dirty = 0; | |
1417 | saved_bh = NULL; | |
1418 | /* blocknr of 0 is no longer in the hash, ignore it */ | |
1419 | if (cn->blocknr == 0) { | |
1420 | goto free_cnode; | |
1421 | } | |
1422 | ||
098297b2 JM |
1423 | /* |
1424 | * This transaction failed commit. | |
1425 | * Don't write out to the disk | |
1426 | */ | |
bd4c625c LT |
1427 | if (!(jl->j_state & LIST_DIRTY)) |
1428 | goto free_cnode; | |
1429 | ||
1430 | pjl = find_newer_jl_for_cn(cn); | |
098297b2 JM |
1431 | /* |
1432 | * the order is important here. We check pjl to make sure we | |
1433 | * don't clear BH_JDirty_wait if we aren't the one writing this | |
1434 | * block to disk | |
bd4c625c LT |
1435 | */ |
1436 | if (!pjl && cn->bh) { | |
1437 | saved_bh = cn->bh; | |
1438 | ||
098297b2 JM |
1439 | /* |
1440 | * we do this to make sure nobody releases the | |
1441 | * buffer while we are working with it | |
bd4c625c LT |
1442 | */ |
1443 | get_bh(saved_bh); | |
1444 | ||
1445 | if (buffer_journal_dirty(saved_bh)) { | |
1446 | BUG_ON(!can_dirty(cn)); | |
1447 | was_jwait = 1; | |
1448 | was_dirty = 1; | |
1449 | } else if (can_dirty(cn)) { | |
098297b2 JM |
1450 | /* |
1451 | * everything with !pjl && jwait | |
1452 | * should be writable | |
1453 | */ | |
bd4c625c LT |
1454 | BUG(); |
1455 | } | |
1456 | } | |
1457 | ||
098297b2 JM |
1458 | /* |
1459 | * if someone has this block in a newer transaction, just make | |
1460 | * sure they are committed, and don't try writing it to disk | |
bd4c625c LT |
1461 | */ |
1462 | if (pjl) { | |
1463 | if (atomic_read(&pjl->j_commit_left)) | |
1464 | flush_commit_list(s, pjl, 1); | |
1465 | goto free_cnode; | |
1466 | } | |
1467 | ||
098297b2 JM |
1468 | /* |
1469 | * bh == NULL when the block got to disk on its own, OR, | |
1470 | * the block got freed in a future transaction | |
bd4c625c LT |
1471 | */ |
1472 | if (saved_bh == NULL) { | |
1473 | goto free_cnode; | |
1474 | } | |
1475 | ||
098297b2 JM |
1476 | /* |
1477 | * this should never happen. kupdate_one_transaction has | |
1478 | * this list locked while it works, so we should never see a | |
1479 | * buffer here that is not marked JDirty_wait | |
bd4c625c LT |
1480 | */ |
1481 | if ((!was_jwait) && !buffer_locked(saved_bh)) { | |
45b03d5e JM |
1482 | reiserfs_warning(s, "journal-813", |
1483 | "BAD! buffer %llu %cdirty %cjwait, " | |
bd4c625c LT |
1484 | "not in a newer tranasction", |
1485 | (unsigned long long)saved_bh-> | |
1486 | b_blocknr, was_dirty ? ' ' : '!', | |
1487 | was_jwait ? ' ' : '!'); | |
1488 | } | |
1489 | if (was_dirty) { | |
098297b2 JM |
1490 | /* |
1491 | * we inc again because saved_bh gets decremented | |
1492 | * at free_cnode | |
1493 | */ | |
bd4c625c LT |
1494 | get_bh(saved_bh); |
1495 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state); | |
1496 | lock_buffer(saved_bh); | |
1497 | BUG_ON(cn->blocknr != saved_bh->b_blocknr); | |
1498 | if (buffer_dirty(saved_bh)) | |
1499 | submit_logged_buffer(saved_bh); | |
1500 | else | |
1501 | unlock_buffer(saved_bh); | |
1502 | count++; | |
1503 | } else { | |
45b03d5e JM |
1504 | reiserfs_warning(s, "clm-2082", |
1505 | "Unable to flush buffer %llu in %s", | |
bd4c625c | 1506 | (unsigned long long)saved_bh-> |
fbe5498b | 1507 | b_blocknr, __func__); |
bd4c625c | 1508 | } |
cf776a7a | 1509 | free_cnode: |
bd4c625c LT |
1510 | last = cn; |
1511 | cn = cn->next; | |
1512 | if (saved_bh) { | |
098297b2 JM |
1513 | /* |
1514 | * we incremented this to keep others from | |
1515 | * taking the buffer head away | |
1516 | */ | |
bd4c625c | 1517 | put_bh(saved_bh); |
a228bf8f | 1518 | if (atomic_read(&saved_bh->b_count) < 0) { |
45b03d5e JM |
1519 | reiserfs_warning(s, "journal-945", |
1520 | "saved_bh->b_count < 0"); | |
bd4c625c LT |
1521 | } |
1522 | } | |
1523 | } | |
1524 | if (count > 0) { | |
1525 | cn = jl->j_realblock; | |
1526 | while (cn) { | |
1527 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { | |
1528 | if (!cn->bh) { | |
c3a9c210 JM |
1529 | reiserfs_panic(s, "journal-1011", |
1530 | "cn->bh is NULL"); | |
bd4c625c | 1531 | } |
8ebc4232 | 1532 | |
278f6679 JM |
1533 | depth = reiserfs_write_unlock_nested(s); |
1534 | __wait_on_buffer(cn->bh); | |
1535 | reiserfs_write_lock_nested(s, depth); | |
8ebc4232 | 1536 | |
bd4c625c | 1537 | if (!cn->bh) { |
c3a9c210 JM |
1538 | reiserfs_panic(s, "journal-1012", |
1539 | "cn->bh is NULL"); | |
bd4c625c LT |
1540 | } |
1541 | if (unlikely(!buffer_uptodate(cn->bh))) { | |
1542 | #ifdef CONFIG_REISERFS_CHECK | |
45b03d5e JM |
1543 | reiserfs_warning(s, "journal-949", |
1544 | "buffer write failed"); | |
bd4c625c LT |
1545 | #endif |
1546 | err = -EIO; | |
1547 | } | |
098297b2 JM |
1548 | /* |
1549 | * note, we must clear the JDirty_wait bit | |
1550 | * after the up to date check, otherwise we | |
1551 | * race against our flushpage routine | |
bd4c625c LT |
1552 | */ |
1553 | BUG_ON(!test_clear_buffer_journal_dirty | |
1554 | (cn->bh)); | |
1555 | ||
398c95bd | 1556 | /* drop one ref for us */ |
bd4c625c | 1557 | put_bh(cn->bh); |
398c95bd CM |
1558 | /* drop one ref for journal_mark_dirty */ |
1559 | release_buffer_page(cn->bh); | |
bd4c625c LT |
1560 | } |
1561 | cn = cn->next; | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | if (err) | |
1566 | reiserfs_abort(s, -EIO, | |
1567 | "Write error while pushing transaction to disk in %s", | |
fbe5498b | 1568 | __func__); |
cf776a7a | 1569 | flush_older_and_return: |
bd4c625c | 1570 | |
098297b2 JM |
1571 | /* |
1572 | * before we can update the journal header block, we _must_ flush all | |
1573 | * real blocks from all older transactions to disk. This is because | |
1574 | * once the header block is updated, this transaction will not be | |
1575 | * replayed after a crash | |
bd4c625c LT |
1576 | */ |
1577 | if (flushall) { | |
1578 | flush_older_journal_lists(s, jl); | |
1579 | } | |
1580 | ||
1581 | err = journal->j_errno; | |
098297b2 JM |
1582 | /* |
1583 | * before we can remove everything from the hash tables for this | |
1584 | * transaction, we must make sure it can never be replayed | |
1585 | * | |
1586 | * since we are only called from do_journal_end, we know for sure there | |
1587 | * are no allocations going on while we are flushing journal lists. So, | |
1588 | * we only need to update the journal header block for the last list | |
1589 | * being flushed | |
bd4c625c LT |
1590 | */ |
1591 | if (!err && flushall) { | |
1592 | err = | |
1593 | update_journal_header_block(s, | |
1594 | (jl->j_start + jl->j_len + | |
1595 | 2) % SB_ONDISK_JOURNAL_SIZE(s), | |
1596 | jl->j_trans_id); | |
1597 | if (err) | |
1598 | reiserfs_abort(s, -EIO, | |
1599 | "Write error while updating journal header in %s", | |
fbe5498b | 1600 | __func__); |
bd4c625c LT |
1601 | } |
1602 | remove_all_from_journal_list(s, jl, 0); | |
1603 | list_del_init(&jl->j_list); | |
1604 | journal->j_num_lists--; | |
1605 | del_from_work_list(s, jl); | |
1606 | ||
1607 | if (journal->j_last_flush_id != 0 && | |
1608 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { | |
45b03d5e | 1609 | reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", |
bd4c625c LT |
1610 | journal->j_last_flush_id, jl->j_trans_id); |
1611 | } | |
1612 | journal->j_last_flush_id = jl->j_trans_id; | |
1613 | ||
098297b2 JM |
1614 | /* |
1615 | * not strictly required since we are freeing the list, but it should | |
bd4c625c LT |
1616 | * help find code using dead lists later on |
1617 | */ | |
1618 | jl->j_len = 0; | |
a228bf8f | 1619 | atomic_set(&jl->j_nonzerolen, 0); |
bd4c625c LT |
1620 | jl->j_start = 0; |
1621 | jl->j_realblock = NULL; | |
1622 | jl->j_commit_bh = NULL; | |
1623 | jl->j_trans_id = 0; | |
1624 | jl->j_state = 0; | |
1625 | put_journal_list(s, jl); | |
1626 | if (flushall) | |
afe70259 | 1627 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1628 | return err; |
1629 | } | |
1630 | ||
1631 | static int write_one_transaction(struct super_block *s, | |
1632 | struct reiserfs_journal_list *jl, | |
1633 | struct buffer_chunk *chunk) | |
1634 | { | |
1635 | struct reiserfs_journal_cnode *cn; | |
1636 | int ret = 0; | |
1637 | ||
1638 | jl->j_state |= LIST_TOUCHED; | |
1639 | del_from_work_list(s, jl); | |
1640 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { | |
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | cn = jl->j_realblock; | |
1645 | while (cn) { | |
098297b2 JM |
1646 | /* |
1647 | * if the blocknr == 0, this has been cleared from the hash, | |
1648 | * skip it | |
bd4c625c LT |
1649 | */ |
1650 | if (cn->blocknr == 0) { | |
1651 | goto next; | |
1652 | } | |
1653 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { | |
1654 | struct buffer_head *tmp_bh; | |
098297b2 JM |
1655 | /* |
1656 | * we can race against journal_mark_freed when we try | |
bd4c625c LT |
1657 | * to lock_buffer(cn->bh), so we have to inc the buffer |
1658 | * count, and recheck things after locking | |
1659 | */ | |
1660 | tmp_bh = cn->bh; | |
1661 | get_bh(tmp_bh); | |
1662 | lock_buffer(tmp_bh); | |
1663 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { | |
1664 | if (!buffer_journal_dirty(tmp_bh) || | |
1665 | buffer_journal_prepared(tmp_bh)) | |
1666 | BUG(); | |
1667 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); | |
1668 | ret++; | |
1669 | } else { | |
1670 | /* note, cn->bh might be null now */ | |
1671 | unlock_buffer(tmp_bh); | |
1672 | } | |
1673 | put_bh(tmp_bh); | |
1674 | } | |
cf776a7a | 1675 | next: |
bd4c625c LT |
1676 | cn = cn->next; |
1677 | cond_resched(); | |
1678 | } | |
1679 | return ret; | |
1680 | } | |
1681 | ||
1682 | /* used by flush_commit_list */ | |
1683 | static int dirty_one_transaction(struct super_block *s, | |
1684 | struct reiserfs_journal_list *jl) | |
1685 | { | |
1686 | struct reiserfs_journal_cnode *cn; | |
1687 | struct reiserfs_journal_list *pjl; | |
1688 | int ret = 0; | |
1689 | ||
1690 | jl->j_state |= LIST_DIRTY; | |
1691 | cn = jl->j_realblock; | |
1692 | while (cn) { | |
098297b2 JM |
1693 | /* |
1694 | * look for a more recent transaction that logged this | |
1695 | * buffer. Only the most recent transaction with a buffer in | |
1696 | * it is allowed to send that buffer to disk | |
bd4c625c LT |
1697 | */ |
1698 | pjl = find_newer_jl_for_cn(cn); | |
1699 | if (!pjl && cn->blocknr && cn->bh | |
1700 | && buffer_journal_dirty(cn->bh)) { | |
1701 | BUG_ON(!can_dirty(cn)); | |
098297b2 JM |
1702 | /* |
1703 | * if the buffer is prepared, it will either be logged | |
bd4c625c LT |
1704 | * or restored. If restored, we need to make sure |
1705 | * it actually gets marked dirty | |
1706 | */ | |
1707 | clear_buffer_journal_new(cn->bh); | |
1708 | if (buffer_journal_prepared(cn->bh)) { | |
1709 | set_buffer_journal_restore_dirty(cn->bh); | |
1710 | } else { | |
1711 | set_buffer_journal_test(cn->bh); | |
1712 | mark_buffer_dirty(cn->bh); | |
1713 | } | |
1714 | } | |
1715 | cn = cn->next; | |
1716 | } | |
1717 | return ret; | |
1718 | } | |
1719 | ||
1720 | static int kupdate_transactions(struct super_block *s, | |
1721 | struct reiserfs_journal_list *jl, | |
1722 | struct reiserfs_journal_list **next_jl, | |
600ed416 | 1723 | unsigned int *next_trans_id, |
bd4c625c LT |
1724 | int num_blocks, int num_trans) |
1725 | { | |
1726 | int ret = 0; | |
1727 | int written = 0; | |
1728 | int transactions_flushed = 0; | |
600ed416 | 1729 | unsigned int orig_trans_id = jl->j_trans_id; |
bd4c625c LT |
1730 | struct buffer_chunk chunk; |
1731 | struct list_head *entry; | |
1732 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1733 | chunk.nr = 0; | |
1734 | ||
a412f9ef | 1735 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
bd4c625c LT |
1736 | if (!journal_list_still_alive(s, orig_trans_id)) { |
1737 | goto done; | |
1738 | } | |
1739 | ||
098297b2 JM |
1740 | /* |
1741 | * we've got j_flush_mutex held, nobody is going to delete any | |
bd4c625c LT |
1742 | * of these lists out from underneath us |
1743 | */ | |
1744 | while ((num_trans && transactions_flushed < num_trans) || | |
1745 | (!num_trans && written < num_blocks)) { | |
1746 | ||
1747 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || | |
1748 | atomic_read(&jl->j_commit_left) | |
1749 | || !(jl->j_state & LIST_DIRTY)) { | |
1750 | del_from_work_list(s, jl); | |
1751 | break; | |
1752 | } | |
1753 | ret = write_one_transaction(s, jl, &chunk); | |
1754 | ||
1755 | if (ret < 0) | |
1756 | goto done; | |
1757 | transactions_flushed++; | |
1758 | written += ret; | |
1759 | entry = jl->j_list.next; | |
1760 | ||
1761 | /* did we wrap? */ | |
1762 | if (entry == &journal->j_journal_list) { | |
1763 | break; | |
1764 | } | |
1765 | jl = JOURNAL_LIST_ENTRY(entry); | |
1766 | ||
1767 | /* don't bother with older transactions */ | |
1768 | if (jl->j_trans_id <= orig_trans_id) | |
1769 | break; | |
1770 | } | |
1771 | if (chunk.nr) { | |
1772 | write_chunk(&chunk); | |
1773 | } | |
1774 | ||
cf776a7a | 1775 | done: |
afe70259 | 1776 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1777 | return ret; |
1778 | } | |
1779 | ||
098297b2 JM |
1780 | /* |
1781 | * for o_sync and fsync heavy applications, they tend to use | |
1782 | * all the journa list slots with tiny transactions. These | |
1783 | * trigger lots and lots of calls to update the header block, which | |
1784 | * adds seeks and slows things down. | |
1785 | * | |
1786 | * This function tries to clear out a large chunk of the journal lists | |
1787 | * at once, which makes everything faster since only the newest journal | |
1788 | * list updates the header block | |
1789 | */ | |
1da177e4 | 1790 | static int flush_used_journal_lists(struct super_block *s, |
bd4c625c LT |
1791 | struct reiserfs_journal_list *jl) |
1792 | { | |
1793 | unsigned long len = 0; | |
1794 | unsigned long cur_len; | |
1795 | int ret; | |
1796 | int i; | |
1797 | int limit = 256; | |
1798 | struct reiserfs_journal_list *tjl; | |
1799 | struct reiserfs_journal_list *flush_jl; | |
600ed416 | 1800 | unsigned int trans_id; |
bd4c625c LT |
1801 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1802 | ||
1803 | flush_jl = tjl = jl; | |
1804 | ||
1805 | /* in data logging mode, try harder to flush a lot of blocks */ | |
1806 | if (reiserfs_data_log(s)) | |
1807 | limit = 1024; | |
1808 | /* flush for 256 transactions or limit blocks, whichever comes first */ | |
1809 | for (i = 0; i < 256 && len < limit; i++) { | |
1810 | if (atomic_read(&tjl->j_commit_left) || | |
1811 | tjl->j_trans_id < jl->j_trans_id) { | |
1812 | break; | |
1813 | } | |
1814 | cur_len = atomic_read(&tjl->j_nonzerolen); | |
1815 | if (cur_len > 0) { | |
1816 | tjl->j_state &= ~LIST_TOUCHED; | |
1817 | } | |
1818 | len += cur_len; | |
1819 | flush_jl = tjl; | |
1820 | if (tjl->j_list.next == &journal->j_journal_list) | |
1821 | break; | |
1822 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); | |
1823 | } | |
721a769c JM |
1824 | get_journal_list(jl); |
1825 | get_journal_list(flush_jl); | |
098297b2 JM |
1826 | |
1827 | /* | |
1828 | * try to find a group of blocks we can flush across all the | |
1829 | * transactions, but only bother if we've actually spanned | |
1830 | * across multiple lists | |
bd4c625c LT |
1831 | */ |
1832 | if (flush_jl != jl) { | |
1833 | ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); | |
1834 | } | |
1835 | flush_journal_list(s, flush_jl, 1); | |
721a769c JM |
1836 | put_journal_list(s, flush_jl); |
1837 | put_journal_list(s, jl); | |
bd4c625c | 1838 | return 0; |
1da177e4 LT |
1839 | } |
1840 | ||
1841 | /* | |
098297b2 JM |
1842 | * removes any nodes in table with name block and dev as bh. |
1843 | * only touchs the hnext and hprev pointers. | |
1844 | */ | |
1da177e4 | 1845 | void remove_journal_hash(struct super_block *sb, |
bd4c625c LT |
1846 | struct reiserfs_journal_cnode **table, |
1847 | struct reiserfs_journal_list *jl, | |
1848 | unsigned long block, int remove_freed) | |
1849 | { | |
1850 | struct reiserfs_journal_cnode *cur; | |
1851 | struct reiserfs_journal_cnode **head; | |
1852 | ||
1853 | head = &(journal_hash(table, sb, block)); | |
1854 | if (!head) { | |
1855 | return; | |
1856 | } | |
1857 | cur = *head; | |
1858 | while (cur) { | |
1859 | if (cur->blocknr == block && cur->sb == sb | |
1860 | && (jl == NULL || jl == cur->jlist) | |
1861 | && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { | |
1862 | if (cur->hnext) { | |
1863 | cur->hnext->hprev = cur->hprev; | |
1864 | } | |
1865 | if (cur->hprev) { | |
1866 | cur->hprev->hnext = cur->hnext; | |
1867 | } else { | |
1868 | *head = cur->hnext; | |
1869 | } | |
1870 | cur->blocknr = 0; | |
1871 | cur->sb = NULL; | |
1872 | cur->state = 0; | |
098297b2 JM |
1873 | /* |
1874 | * anybody who clears the cur->bh will also | |
1875 | * dec the nonzerolen | |
1876 | */ | |
1877 | if (cur->bh && cur->jlist) | |
a228bf8f | 1878 | atomic_dec(&cur->jlist->j_nonzerolen); |
bd4c625c LT |
1879 | cur->bh = NULL; |
1880 | cur->jlist = NULL; | |
1881 | } | |
1882 | cur = cur->hnext; | |
1883 | } | |
1884 | } | |
1885 | ||
a9dd3643 | 1886 | static void free_journal_ram(struct super_block *sb) |
bd4c625c | 1887 | { |
a9dd3643 | 1888 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
d739b42b | 1889 | kfree(journal->j_current_jl); |
bd4c625c LT |
1890 | journal->j_num_lists--; |
1891 | ||
1892 | vfree(journal->j_cnode_free_orig); | |
a9dd3643 JM |
1893 | free_list_bitmaps(sb, journal->j_list_bitmap); |
1894 | free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ | |
bd4c625c LT |
1895 | if (journal->j_header_bh) { |
1896 | brelse(journal->j_header_bh); | |
1897 | } | |
098297b2 JM |
1898 | /* |
1899 | * j_header_bh is on the journal dev, make sure | |
1900 | * not to release the journal dev until we brelse j_header_bh | |
bd4c625c | 1901 | */ |
a9dd3643 | 1902 | release_journal_dev(sb, journal); |
bd4c625c | 1903 | vfree(journal); |
1da177e4 LT |
1904 | } |
1905 | ||
1906 | /* | |
098297b2 JM |
1907 | * call on unmount. Only set error to 1 if you haven't made your way out |
1908 | * of read_super() yet. Any other caller must keep error at 0. | |
1909 | */ | |
bd4c625c | 1910 | static int do_journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1911 | struct super_block *sb, int error) |
bd4c625c LT |
1912 | { |
1913 | struct reiserfs_transaction_handle myth; | |
1914 | int flushed = 0; | |
a9dd3643 | 1915 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 1916 | |
098297b2 JM |
1917 | /* |
1918 | * we only want to flush out transactions if we were | |
1919 | * called with error == 0 | |
bd4c625c | 1920 | */ |
a9dd3643 | 1921 | if (!error && !(sb->s_flags & MS_RDONLY)) { |
bd4c625c LT |
1922 | /* end the current trans */ |
1923 | BUG_ON(!th->t_trans_id); | |
58d85426 | 1924 | do_journal_end(th, FLUSH_ALL); |
bd4c625c | 1925 | |
098297b2 JM |
1926 | /* |
1927 | * make sure something gets logged to force | |
1928 | * our way into the flush code | |
1929 | */ | |
b491dd17 | 1930 | if (!journal_join(&myth, sb)) { |
a9dd3643 JM |
1931 | reiserfs_prepare_for_journal(sb, |
1932 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1933 | 1); |
09f1b80b | 1934 | journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb)); |
58d85426 | 1935 | do_journal_end(&myth, FLUSH_ALL); |
bd4c625c LT |
1936 | flushed = 1; |
1937 | } | |
1938 | } | |
1939 | ||
1940 | /* this also catches errors during the do_journal_end above */ | |
1941 | if (!error && reiserfs_is_journal_aborted(journal)) { | |
1942 | memset(&myth, 0, sizeof(myth)); | |
b491dd17 | 1943 | if (!journal_join_abort(&myth, sb)) { |
a9dd3643 JM |
1944 | reiserfs_prepare_for_journal(sb, |
1945 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1946 | 1); |
09f1b80b | 1947 | journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb)); |
58d85426 | 1948 | do_journal_end(&myth, FLUSH_ALL); |
bd4c625c LT |
1949 | } |
1950 | } | |
1951 | ||
8ebc4232 FW |
1952 | |
1953 | /* | |
1954 | * We must release the write lock here because | |
1955 | * the workqueue job (flush_async_commit) needs this lock | |
1956 | */ | |
1957 | reiserfs_write_unlock(sb); | |
033369d1 | 1958 | |
01777836 JK |
1959 | /* |
1960 | * Cancel flushing of old commits. Note that neither of these works | |
1961 | * will be requeued because superblock is being shutdown and doesn't | |
1962 | * have MS_ACTIVE set. | |
1963 | */ | |
033369d1 | 1964 | cancel_delayed_work_sync(&REISERFS_SB(sb)->old_work); |
01777836 JK |
1965 | /* wait for all commits to finish */ |
1966 | cancel_delayed_work_sync(&SB_JOURNAL(sb)->j_work); | |
bd4c625c | 1967 | |
a9dd3643 | 1968 | free_journal_ram(sb); |
bd4c625c | 1969 | |
0523676d FW |
1970 | reiserfs_write_lock(sb); |
1971 | ||
bd4c625c | 1972 | return 0; |
1da177e4 LT |
1973 | } |
1974 | ||
098297b2 | 1975 | /* * call on unmount. flush all journal trans, release all alloc'd ram */ |
bd4c625c | 1976 | int journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1977 | struct super_block *sb) |
bd4c625c | 1978 | { |
a9dd3643 | 1979 | return do_journal_release(th, sb, 0); |
1da177e4 | 1980 | } |
bd4c625c | 1981 | |
098297b2 | 1982 | /* only call from an error condition inside reiserfs_read_super! */ |
bd4c625c | 1983 | int journal_release_error(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1984 | struct super_block *sb) |
bd4c625c | 1985 | { |
a9dd3643 | 1986 | return do_journal_release(th, sb, 1); |
1da177e4 LT |
1987 | } |
1988 | ||
098297b2 JM |
1989 | /* |
1990 | * compares description block with commit block. | |
1991 | * returns 1 if they differ, 0 if they are the same | |
1992 | */ | |
a9dd3643 | 1993 | static int journal_compare_desc_commit(struct super_block *sb, |
bd4c625c LT |
1994 | struct reiserfs_journal_desc *desc, |
1995 | struct reiserfs_journal_commit *commit) | |
1996 | { | |
1997 | if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || | |
1998 | get_commit_trans_len(commit) != get_desc_trans_len(desc) || | |
a9dd3643 | 1999 | get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || |
bd4c625c LT |
2000 | get_commit_trans_len(commit) <= 0) { |
2001 | return 1; | |
2002 | } | |
2003 | return 0; | |
1da177e4 | 2004 | } |
bd4c625c | 2005 | |
098297b2 JM |
2006 | /* |
2007 | * returns 0 if it did not find a description block | |
2008 | * returns -1 if it found a corrupt commit block | |
2009 | * returns 1 if both desc and commit were valid | |
2010 | * NOTE: only called during fs mount | |
2011 | */ | |
a9dd3643 | 2012 | static int journal_transaction_is_valid(struct super_block *sb, |
bd4c625c | 2013 | struct buffer_head *d_bh, |
600ed416 | 2014 | unsigned int *oldest_invalid_trans_id, |
bd4c625c LT |
2015 | unsigned long *newest_mount_id) |
2016 | { | |
2017 | struct reiserfs_journal_desc *desc; | |
2018 | struct reiserfs_journal_commit *commit; | |
2019 | struct buffer_head *c_bh; | |
2020 | unsigned long offset; | |
2021 | ||
2022 | if (!d_bh) | |
2023 | return 0; | |
2024 | ||
2025 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2026 | if (get_desc_trans_len(desc) > 0 | |
2027 | && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { | |
2028 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id | |
2029 | && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { | |
a9dd3643 | 2030 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2031 | "journal-986: transaction " |
2032 | "is valid returning because trans_id %d is greater than " | |
2033 | "oldest_invalid %lu", | |
2034 | get_desc_trans_id(desc), | |
2035 | *oldest_invalid_trans_id); | |
2036 | return 0; | |
2037 | } | |
2038 | if (newest_mount_id | |
2039 | && *newest_mount_id > get_desc_mount_id(desc)) { | |
a9dd3643 | 2040 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2041 | "journal-1087: transaction " |
2042 | "is valid returning because mount_id %d is less than " | |
2043 | "newest_mount_id %lu", | |
2044 | get_desc_mount_id(desc), | |
2045 | *newest_mount_id); | |
2046 | return -1; | |
2047 | } | |
a9dd3643 JM |
2048 | if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { |
2049 | reiserfs_warning(sb, "journal-2018", | |
45b03d5e JM |
2050 | "Bad transaction length %d " |
2051 | "encountered, ignoring transaction", | |
bd4c625c LT |
2052 | get_desc_trans_len(desc)); |
2053 | return -1; | |
2054 | } | |
a9dd3643 | 2055 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c | 2056 | |
098297b2 JM |
2057 | /* |
2058 | * ok, we have a journal description block, | |
2059 | * let's see if the transaction was valid | |
2060 | */ | |
bd4c625c | 2061 | c_bh = |
a9dd3643 JM |
2062 | journal_bread(sb, |
2063 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2064 | ((offset + get_desc_trans_len(desc) + |
a9dd3643 | 2065 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2066 | if (!c_bh) |
2067 | return 0; | |
2068 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2069 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2070 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2071 | "journal_transaction_is_valid, commit offset %ld had bad " |
2072 | "time %d or length %d", | |
2073 | c_bh->b_blocknr - | |
a9dd3643 | 2074 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2075 | get_commit_trans_id(commit), |
2076 | get_commit_trans_len(commit)); | |
2077 | brelse(c_bh); | |
2078 | if (oldest_invalid_trans_id) { | |
2079 | *oldest_invalid_trans_id = | |
2080 | get_desc_trans_id(desc); | |
a9dd3643 | 2081 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2082 | "journal-1004: " |
2083 | "transaction_is_valid setting oldest invalid trans_id " | |
2084 | "to %d", | |
2085 | get_desc_trans_id(desc)); | |
2086 | } | |
2087 | return -1; | |
2088 | } | |
2089 | brelse(c_bh); | |
a9dd3643 | 2090 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2091 | "journal-1006: found valid " |
2092 | "transaction start offset %llu, len %d id %d", | |
2093 | d_bh->b_blocknr - | |
a9dd3643 | 2094 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2095 | get_desc_trans_len(desc), |
2096 | get_desc_trans_id(desc)); | |
2097 | return 1; | |
2098 | } else { | |
2099 | return 0; | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | static void brelse_array(struct buffer_head **heads, int num) | |
2104 | { | |
2105 | int i; | |
2106 | for (i = 0; i < num; i++) { | |
2107 | brelse(heads[i]); | |
2108 | } | |
1da177e4 LT |
2109 | } |
2110 | ||
2111 | /* | |
098297b2 JM |
2112 | * given the start, and values for the oldest acceptable transactions, |
2113 | * this either reads in a replays a transaction, or returns because the | |
2114 | * transaction is invalid, or too old. | |
2115 | * NOTE: only called during fs mount | |
2116 | */ | |
a9dd3643 | 2117 | static int journal_read_transaction(struct super_block *sb, |
bd4c625c LT |
2118 | unsigned long cur_dblock, |
2119 | unsigned long oldest_start, | |
600ed416 | 2120 | unsigned int oldest_trans_id, |
bd4c625c LT |
2121 | unsigned long newest_mount_id) |
2122 | { | |
a9dd3643 | 2123 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
2124 | struct reiserfs_journal_desc *desc; |
2125 | struct reiserfs_journal_commit *commit; | |
600ed416 | 2126 | unsigned int trans_id = 0; |
bd4c625c LT |
2127 | struct buffer_head *c_bh; |
2128 | struct buffer_head *d_bh; | |
2129 | struct buffer_head **log_blocks = NULL; | |
2130 | struct buffer_head **real_blocks = NULL; | |
600ed416 | 2131 | unsigned int trans_offset; |
bd4c625c LT |
2132 | int i; |
2133 | int trans_half; | |
2134 | ||
a9dd3643 | 2135 | d_bh = journal_bread(sb, cur_dblock); |
bd4c625c LT |
2136 | if (!d_bh) |
2137 | return 1; | |
2138 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
a9dd3643 JM |
2139 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2140 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " | |
bd4c625c | 2141 | "journal_read_transaction, offset %llu, len %d mount_id %d", |
a9dd3643 | 2142 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2143 | get_desc_trans_len(desc), get_desc_mount_id(desc)); |
2144 | if (get_desc_trans_id(desc) < oldest_trans_id) { | |
a9dd3643 | 2145 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " |
bd4c625c LT |
2146 | "journal_read_trans skipping because %lu is too old", |
2147 | cur_dblock - | |
a9dd3643 | 2148 | SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2149 | brelse(d_bh); |
2150 | return 1; | |
2151 | } | |
2152 | if (get_desc_mount_id(desc) != newest_mount_id) { | |
a9dd3643 | 2153 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " |
bd4c625c LT |
2154 | "journal_read_trans skipping because %d is != " |
2155 | "newest_mount_id %lu", get_desc_mount_id(desc), | |
2156 | newest_mount_id); | |
2157 | brelse(d_bh); | |
2158 | return 1; | |
2159 | } | |
a9dd3643 | 2160 | c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2161 | ((trans_offset + get_desc_trans_len(desc) + 1) % |
a9dd3643 | 2162 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2163 | if (!c_bh) { |
2164 | brelse(d_bh); | |
2165 | return 1; | |
2166 | } | |
2167 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2168 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2169 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2170 | "journal_read_transaction, " |
2171 | "commit offset %llu had bad time %d or length %d", | |
2172 | c_bh->b_blocknr - | |
a9dd3643 | 2173 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2174 | get_commit_trans_id(commit), |
2175 | get_commit_trans_len(commit)); | |
2176 | brelse(c_bh); | |
2177 | brelse(d_bh); | |
2178 | return 1; | |
2179 | } | |
3f8b5ee3 JM |
2180 | |
2181 | if (bdev_read_only(sb->s_bdev)) { | |
2182 | reiserfs_warning(sb, "clm-2076", | |
2183 | "device is readonly, unable to replay log"); | |
2184 | brelse(c_bh); | |
2185 | brelse(d_bh); | |
2186 | return -EROFS; | |
2187 | } | |
2188 | ||
bd4c625c | 2189 | trans_id = get_desc_trans_id(desc); |
098297b2 JM |
2190 | /* |
2191 | * now we know we've got a good transaction, and it was | |
2192 | * inside the valid time ranges | |
2193 | */ | |
d739b42b PE |
2194 | log_blocks = kmalloc(get_desc_trans_len(desc) * |
2195 | sizeof(struct buffer_head *), GFP_NOFS); | |
2196 | real_blocks = kmalloc(get_desc_trans_len(desc) * | |
2197 | sizeof(struct buffer_head *), GFP_NOFS); | |
bd4c625c LT |
2198 | if (!log_blocks || !real_blocks) { |
2199 | brelse(c_bh); | |
2200 | brelse(d_bh); | |
d739b42b PE |
2201 | kfree(log_blocks); |
2202 | kfree(real_blocks); | |
a9dd3643 | 2203 | reiserfs_warning(sb, "journal-1169", |
45b03d5e | 2204 | "kmalloc failed, unable to mount FS"); |
bd4c625c LT |
2205 | return -1; |
2206 | } | |
2207 | /* get all the buffer heads */ | |
a9dd3643 | 2208 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
2209 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
2210 | log_blocks[i] = | |
a9dd3643 JM |
2211 | journal_getblk(sb, |
2212 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2213 | (trans_offset + 1 + |
a9dd3643 | 2214 | i) % SB_ONDISK_JOURNAL_SIZE(sb)); |
bd4c625c LT |
2215 | if (i < trans_half) { |
2216 | real_blocks[i] = | |
a9dd3643 | 2217 | sb_getblk(sb, |
bd4c625c LT |
2218 | le32_to_cpu(desc->j_realblock[i])); |
2219 | } else { | |
2220 | real_blocks[i] = | |
a9dd3643 | 2221 | sb_getblk(sb, |
bd4c625c LT |
2222 | le32_to_cpu(commit-> |
2223 | j_realblock[i - trans_half])); | |
2224 | } | |
a9dd3643 JM |
2225 | if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { |
2226 | reiserfs_warning(sb, "journal-1207", | |
45b03d5e JM |
2227 | "REPLAY FAILURE fsck required! " |
2228 | "Block to replay is outside of " | |
2229 | "filesystem"); | |
bd4c625c LT |
2230 | goto abort_replay; |
2231 | } | |
2232 | /* make sure we don't try to replay onto log or reserved area */ | |
2233 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
2234 | (sb, real_blocks[i]->b_blocknr)) { |
2235 | reiserfs_warning(sb, "journal-1204", | |
45b03d5e JM |
2236 | "REPLAY FAILURE fsck required! " |
2237 | "Trying to replay onto a log block"); | |
cf776a7a | 2238 | abort_replay: |
bd4c625c LT |
2239 | brelse_array(log_blocks, i); |
2240 | brelse_array(real_blocks, i); | |
2241 | brelse(c_bh); | |
2242 | brelse(d_bh); | |
d739b42b PE |
2243 | kfree(log_blocks); |
2244 | kfree(real_blocks); | |
bd4c625c LT |
2245 | return -1; |
2246 | } | |
2247 | } | |
2248 | /* read in the log blocks, memcpy to the corresponding real block */ | |
2249 | ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); | |
2250 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
8ebc4232 | 2251 | |
bd4c625c LT |
2252 | wait_on_buffer(log_blocks[i]); |
2253 | if (!buffer_uptodate(log_blocks[i])) { | |
a9dd3643 | 2254 | reiserfs_warning(sb, "journal-1212", |
45b03d5e JM |
2255 | "REPLAY FAILURE fsck required! " |
2256 | "buffer write failed"); | |
bd4c625c LT |
2257 | brelse_array(log_blocks + i, |
2258 | get_desc_trans_len(desc) - i); | |
2259 | brelse_array(real_blocks, get_desc_trans_len(desc)); | |
2260 | brelse(c_bh); | |
2261 | brelse(d_bh); | |
d739b42b PE |
2262 | kfree(log_blocks); |
2263 | kfree(real_blocks); | |
bd4c625c LT |
2264 | return -1; |
2265 | } | |
2266 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, | |
2267 | real_blocks[i]->b_size); | |
2268 | set_buffer_uptodate(real_blocks[i]); | |
2269 | brelse(log_blocks[i]); | |
2270 | } | |
2271 | /* flush out the real blocks */ | |
2272 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2273 | set_buffer_dirty(real_blocks[i]); | |
9cb569d6 | 2274 | write_dirty_buffer(real_blocks[i], WRITE); |
bd4c625c LT |
2275 | } |
2276 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2277 | wait_on_buffer(real_blocks[i]); | |
2278 | if (!buffer_uptodate(real_blocks[i])) { | |
a9dd3643 | 2279 | reiserfs_warning(sb, "journal-1226", |
45b03d5e JM |
2280 | "REPLAY FAILURE, fsck required! " |
2281 | "buffer write failed"); | |
bd4c625c LT |
2282 | brelse_array(real_blocks + i, |
2283 | get_desc_trans_len(desc) - i); | |
2284 | brelse(c_bh); | |
2285 | brelse(d_bh); | |
d739b42b PE |
2286 | kfree(log_blocks); |
2287 | kfree(real_blocks); | |
bd4c625c LT |
2288 | return -1; |
2289 | } | |
2290 | brelse(real_blocks[i]); | |
2291 | } | |
2292 | cur_dblock = | |
a9dd3643 | 2293 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2294 | ((trans_offset + get_desc_trans_len(desc) + |
a9dd3643 JM |
2295 | 2) % SB_ONDISK_JOURNAL_SIZE(sb)); |
2296 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c | 2297 | "journal-1095: setting journal " "start to offset %ld", |
a9dd3643 | 2298 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c | 2299 | |
098297b2 JM |
2300 | /* |
2301 | * init starting values for the first transaction, in case | |
2302 | * this is the last transaction to be replayed. | |
2303 | */ | |
a9dd3643 | 2304 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2305 | journal->j_last_flush_trans_id = trans_id; |
2306 | journal->j_trans_id = trans_id + 1; | |
a44c94a7 AZ |
2307 | /* check for trans_id overflow */ |
2308 | if (journal->j_trans_id == 0) | |
2309 | journal->j_trans_id = 10; | |
bd4c625c LT |
2310 | brelse(c_bh); |
2311 | brelse(d_bh); | |
d739b42b PE |
2312 | kfree(log_blocks); |
2313 | kfree(real_blocks); | |
bd4c625c | 2314 | return 0; |
1da177e4 LT |
2315 | } |
2316 | ||
098297b2 JM |
2317 | /* |
2318 | * This function reads blocks starting from block and to max_block of bufsize | |
2319 | * size (but no more than BUFNR blocks at a time). This proved to improve | |
2320 | * mounting speed on self-rebuilding raid5 arrays at least. | |
2321 | * Right now it is only used from journal code. But later we might use it | |
2322 | * from other places. | |
2323 | * Note: Do not use journal_getblk/sb_getblk functions here! | |
2324 | */ | |
3ee16670 JM |
2325 | static struct buffer_head *reiserfs_breada(struct block_device *dev, |
2326 | b_blocknr_t block, int bufsize, | |
2327 | b_blocknr_t max_block) | |
1da177e4 | 2328 | { |
bd4c625c | 2329 | struct buffer_head *bhlist[BUFNR]; |
1da177e4 | 2330 | unsigned int blocks = BUFNR; |
bd4c625c | 2331 | struct buffer_head *bh; |
1da177e4 | 2332 | int i, j; |
bd4c625c LT |
2333 | |
2334 | bh = __getblk(dev, block, bufsize); | |
2335 | if (buffer_uptodate(bh)) | |
2336 | return (bh); | |
2337 | ||
1da177e4 LT |
2338 | if (block + BUFNR > max_block) { |
2339 | blocks = max_block - block; | |
2340 | } | |
2341 | bhlist[0] = bh; | |
2342 | j = 1; | |
2343 | for (i = 1; i < blocks; i++) { | |
bd4c625c LT |
2344 | bh = __getblk(dev, block + i, bufsize); |
2345 | if (buffer_uptodate(bh)) { | |
2346 | brelse(bh); | |
1da177e4 | 2347 | break; |
bd4c625c LT |
2348 | } else |
2349 | bhlist[j++] = bh; | |
1da177e4 | 2350 | } |
bd4c625c LT |
2351 | ll_rw_block(READ, j, bhlist); |
2352 | for (i = 1; i < j; i++) | |
2353 | brelse(bhlist[i]); | |
1da177e4 | 2354 | bh = bhlist[0]; |
bd4c625c LT |
2355 | wait_on_buffer(bh); |
2356 | if (buffer_uptodate(bh)) | |
1da177e4 | 2357 | return bh; |
bd4c625c | 2358 | brelse(bh); |
1da177e4 LT |
2359 | return NULL; |
2360 | } | |
2361 | ||
2362 | /* | |
098297b2 JM |
2363 | * read and replay the log |
2364 | * on a clean unmount, the journal header's next unflushed pointer will be | |
2365 | * to an invalid transaction. This tests that before finding all the | |
2366 | * transactions in the log, which makes normal mount times fast. | |
2367 | * | |
2368 | * After a crash, this starts with the next unflushed transaction, and | |
2369 | * replays until it finds one too old, or invalid. | |
2370 | * | |
2371 | * On exit, it sets things up so the first transaction will work correctly. | |
2372 | * NOTE: only called during fs mount | |
2373 | */ | |
a9dd3643 | 2374 | static int journal_read(struct super_block *sb) |
bd4c625c | 2375 | { |
a9dd3643 | 2376 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 2377 | struct reiserfs_journal_desc *desc; |
600ed416 JM |
2378 | unsigned int oldest_trans_id = 0; |
2379 | unsigned int oldest_invalid_trans_id = 0; | |
bd4c625c LT |
2380 | time_t start; |
2381 | unsigned long oldest_start = 0; | |
2382 | unsigned long cur_dblock = 0; | |
2383 | unsigned long newest_mount_id = 9; | |
2384 | struct buffer_head *d_bh; | |
2385 | struct reiserfs_journal_header *jh; | |
2386 | int valid_journal_header = 0; | |
2387 | int replay_count = 0; | |
2388 | int continue_replay = 1; | |
2389 | int ret; | |
2390 | char b[BDEVNAME_SIZE]; | |
2391 | ||
a9dd3643 JM |
2392 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2393 | reiserfs_info(sb, "checking transaction log (%s)\n", | |
bd4c625c LT |
2394 | bdevname(journal->j_dev_bd, b)); |
2395 | start = get_seconds(); | |
2396 | ||
098297b2 JM |
2397 | /* |
2398 | * step 1, read in the journal header block. Check the transaction | |
2399 | * it says is the first unflushed, and if that transaction is not | |
2400 | * valid, replay is done | |
bd4c625c | 2401 | */ |
a9dd3643 JM |
2402 | journal->j_header_bh = journal_bread(sb, |
2403 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) | |
2404 | + SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c LT |
2405 | if (!journal->j_header_bh) { |
2406 | return 1; | |
2407 | } | |
2408 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); | |
c499ec24 | 2409 | if (le32_to_cpu(jh->j_first_unflushed_offset) < |
a9dd3643 | 2410 | SB_ONDISK_JOURNAL_SIZE(sb) |
bd4c625c LT |
2411 | && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { |
2412 | oldest_start = | |
a9dd3643 | 2413 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c LT |
2414 | le32_to_cpu(jh->j_first_unflushed_offset); |
2415 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2416 | newest_mount_id = le32_to_cpu(jh->j_mount_id); | |
a9dd3643 | 2417 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2418 | "journal-1153: found in " |
2419 | "header: first_unflushed_offset %d, last_flushed_trans_id " | |
2420 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), | |
2421 | le32_to_cpu(jh->j_last_flush_trans_id)); | |
2422 | valid_journal_header = 1; | |
2423 | ||
098297b2 JM |
2424 | /* |
2425 | * now, we try to read the first unflushed offset. If it | |
2426 | * is not valid, there is nothing more we can do, and it | |
2427 | * makes no sense to read through the whole log. | |
bd4c625c LT |
2428 | */ |
2429 | d_bh = | |
a9dd3643 JM |
2430 | journal_bread(sb, |
2431 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2432 | le32_to_cpu(jh->j_first_unflushed_offset)); |
a9dd3643 | 2433 | ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); |
bd4c625c LT |
2434 | if (!ret) { |
2435 | continue_replay = 0; | |
2436 | } | |
2437 | brelse(d_bh); | |
2438 | goto start_log_replay; | |
2439 | } | |
2440 | ||
098297b2 JM |
2441 | /* |
2442 | * ok, there are transactions that need to be replayed. start | |
2443 | * with the first log block, find all the valid transactions, and | |
2444 | * pick out the oldest. | |
bd4c625c LT |
2445 | */ |
2446 | while (continue_replay | |
2447 | && cur_dblock < | |
a9dd3643 JM |
2448 | (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
2449 | SB_ONDISK_JOURNAL_SIZE(sb))) { | |
098297b2 JM |
2450 | /* |
2451 | * Note that it is required for blocksize of primary fs | |
2452 | * device and journal device to be the same | |
2453 | */ | |
bd4c625c LT |
2454 | d_bh = |
2455 | reiserfs_breada(journal->j_dev_bd, cur_dblock, | |
a9dd3643 JM |
2456 | sb->s_blocksize, |
2457 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2458 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2459 | ret = |
a9dd3643 | 2460 | journal_transaction_is_valid(sb, d_bh, |
bd4c625c LT |
2461 | &oldest_invalid_trans_id, |
2462 | &newest_mount_id); | |
2463 | if (ret == 1) { | |
2464 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2465 | if (oldest_start == 0) { /* init all oldest_ values */ | |
2466 | oldest_trans_id = get_desc_trans_id(desc); | |
2467 | oldest_start = d_bh->b_blocknr; | |
2468 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2469 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2470 | "journal-1179: Setting " |
2471 | "oldest_start to offset %llu, trans_id %lu", | |
2472 | oldest_start - | |
2473 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2474 | (sb), oldest_trans_id); |
bd4c625c LT |
2475 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { |
2476 | /* one we just read was older */ | |
2477 | oldest_trans_id = get_desc_trans_id(desc); | |
2478 | oldest_start = d_bh->b_blocknr; | |
a9dd3643 | 2479 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2480 | "journal-1180: Resetting " |
2481 | "oldest_start to offset %lu, trans_id %lu", | |
2482 | oldest_start - | |
2483 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2484 | (sb), oldest_trans_id); |
bd4c625c LT |
2485 | } |
2486 | if (newest_mount_id < get_desc_mount_id(desc)) { | |
2487 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2488 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2489 | "journal-1299: Setting " |
2490 | "newest_mount_id to %d", | |
2491 | get_desc_mount_id(desc)); | |
2492 | } | |
2493 | cur_dblock += get_desc_trans_len(desc) + 2; | |
2494 | } else { | |
2495 | cur_dblock++; | |
2496 | } | |
2497 | brelse(d_bh); | |
2498 | } | |
2499 | ||
cf776a7a | 2500 | start_log_replay: |
bd4c625c LT |
2501 | cur_dblock = oldest_start; |
2502 | if (oldest_trans_id) { | |
a9dd3643 | 2503 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2504 | "journal-1206: Starting replay " |
2505 | "from offset %llu, trans_id %lu", | |
a9dd3643 | 2506 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2507 | oldest_trans_id); |
2508 | ||
2509 | } | |
2510 | replay_count = 0; | |
2511 | while (continue_replay && oldest_trans_id > 0) { | |
2512 | ret = | |
a9dd3643 | 2513 | journal_read_transaction(sb, cur_dblock, oldest_start, |
bd4c625c LT |
2514 | oldest_trans_id, newest_mount_id); |
2515 | if (ret < 0) { | |
2516 | return ret; | |
2517 | } else if (ret != 0) { | |
2518 | break; | |
2519 | } | |
2520 | cur_dblock = | |
a9dd3643 | 2521 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; |
bd4c625c LT |
2522 | replay_count++; |
2523 | if (cur_dblock == oldest_start) | |
2524 | break; | |
2525 | } | |
2526 | ||
2527 | if (oldest_trans_id == 0) { | |
a9dd3643 | 2528 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2529 | "journal-1225: No valid " "transactions found"); |
2530 | } | |
098297b2 JM |
2531 | /* |
2532 | * j_start does not get set correctly if we don't replay any | |
2533 | * transactions. if we had a valid journal_header, set j_start | |
2534 | * to the first unflushed transaction value, copy the trans_id | |
2535 | * from the header | |
bd4c625c LT |
2536 | */ |
2537 | if (valid_journal_header && replay_count == 0) { | |
2538 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); | |
2539 | journal->j_trans_id = | |
2540 | le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
a44c94a7 AZ |
2541 | /* check for trans_id overflow */ |
2542 | if (journal->j_trans_id == 0) | |
2543 | journal->j_trans_id = 10; | |
bd4c625c LT |
2544 | journal->j_last_flush_trans_id = |
2545 | le32_to_cpu(jh->j_last_flush_trans_id); | |
2546 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; | |
2547 | } else { | |
2548 | journal->j_mount_id = newest_mount_id + 1; | |
2549 | } | |
a9dd3643 | 2550 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " |
bd4c625c LT |
2551 | "newest_mount_id to %lu", journal->j_mount_id); |
2552 | journal->j_first_unflushed_offset = journal->j_start; | |
2553 | if (replay_count > 0) { | |
a9dd3643 | 2554 | reiserfs_info(sb, |
bd4c625c LT |
2555 | "replayed %d transactions in %lu seconds\n", |
2556 | replay_count, get_seconds() - start); | |
2557 | } | |
278f6679 JM |
2558 | /* needed to satisfy the locking in _update_journal_header_block */ |
2559 | reiserfs_write_lock(sb); | |
a9dd3643 JM |
2560 | if (!bdev_read_only(sb->s_bdev) && |
2561 | _update_journal_header_block(sb, journal->j_start, | |
bd4c625c | 2562 | journal->j_last_flush_trans_id)) { |
278f6679 | 2563 | reiserfs_write_unlock(sb); |
098297b2 JM |
2564 | /* |
2565 | * replay failed, caller must call free_journal_ram and abort | |
2566 | * the mount | |
bd4c625c LT |
2567 | */ |
2568 | return -1; | |
2569 | } | |
278f6679 | 2570 | reiserfs_write_unlock(sb); |
bd4c625c | 2571 | return 0; |
1da177e4 LT |
2572 | } |
2573 | ||
2574 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) | |
2575 | { | |
bd4c625c | 2576 | struct reiserfs_journal_list *jl; |
8c777cc4 PE |
2577 | jl = kzalloc(sizeof(struct reiserfs_journal_list), |
2578 | GFP_NOFS | __GFP_NOFAIL); | |
bd4c625c LT |
2579 | INIT_LIST_HEAD(&jl->j_list); |
2580 | INIT_LIST_HEAD(&jl->j_working_list); | |
2581 | INIT_LIST_HEAD(&jl->j_tail_bh_list); | |
2582 | INIT_LIST_HEAD(&jl->j_bh_list); | |
90415dea | 2583 | mutex_init(&jl->j_commit_mutex); |
bd4c625c LT |
2584 | SB_JOURNAL(s)->j_num_lists++; |
2585 | get_journal_list(jl); | |
2586 | return jl; | |
2587 | } | |
2588 | ||
a9dd3643 | 2589 | static void journal_list_init(struct super_block *sb) |
bd4c625c | 2590 | { |
a9dd3643 | 2591 | SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
2592 | } |
2593 | ||
4385bab1 | 2594 | static void release_journal_dev(struct super_block *super, |
bd4c625c LT |
2595 | struct reiserfs_journal *journal) |
2596 | { | |
86098fa0 | 2597 | if (journal->j_dev_bd != NULL) { |
4385bab1 | 2598 | blkdev_put(journal->j_dev_bd, journal->j_dev_mode); |
bd4c625c LT |
2599 | journal->j_dev_bd = NULL; |
2600 | } | |
bd4c625c LT |
2601 | } |
2602 | ||
2603 | static int journal_init_dev(struct super_block *super, | |
2604 | struct reiserfs_journal *journal, | |
2605 | const char *jdev_name) | |
1da177e4 LT |
2606 | { |
2607 | int result; | |
2608 | dev_t jdev; | |
e525fd89 | 2609 | fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; |
1da177e4 LT |
2610 | char b[BDEVNAME_SIZE]; |
2611 | ||
2612 | result = 0; | |
2613 | ||
bd4c625c | 2614 | journal->j_dev_bd = NULL; |
bd4c625c LT |
2615 | jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? |
2616 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; | |
1da177e4 LT |
2617 | |
2618 | if (bdev_read_only(super->s_bdev)) | |
bd4c625c | 2619 | blkdev_mode = FMODE_READ; |
1da177e4 LT |
2620 | |
2621 | /* there is no "jdev" option and journal is on separate device */ | |
bd4c625c | 2622 | if ((!jdev_name || !jdev_name[0])) { |
e525fd89 TH |
2623 | if (jdev == super->s_dev) |
2624 | blkdev_mode &= ~FMODE_EXCL; | |
d4d77629 TH |
2625 | journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, |
2626 | journal); | |
e5eb8caa | 2627 | journal->j_dev_mode = blkdev_mode; |
1da177e4 LT |
2628 | if (IS_ERR(journal->j_dev_bd)) { |
2629 | result = PTR_ERR(journal->j_dev_bd); | |
2630 | journal->j_dev_bd = NULL; | |
45b03d5e | 2631 | reiserfs_warning(super, "sh-458", |
bd4c625c LT |
2632 | "cannot init journal device '%s': %i", |
2633 | __bdevname(jdev, b), result); | |
1da177e4 | 2634 | return result; |
e525fd89 | 2635 | } else if (jdev != super->s_dev) |
1da177e4 | 2636 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
86098fa0 | 2637 | |
1da177e4 LT |
2638 | return 0; |
2639 | } | |
2640 | ||
e5eb8caa | 2641 | journal->j_dev_mode = blkdev_mode; |
d4d77629 | 2642 | journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); |
86098fa0 CH |
2643 | if (IS_ERR(journal->j_dev_bd)) { |
2644 | result = PTR_ERR(journal->j_dev_bd); | |
2645 | journal->j_dev_bd = NULL; | |
bd4c625c LT |
2646 | reiserfs_warning(super, |
2647 | "journal_init_dev: Cannot open '%s': %i", | |
2648 | jdev_name, result); | |
86098fa0 | 2649 | return result; |
1da177e4 | 2650 | } |
86098fa0 CH |
2651 | |
2652 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
2653 | reiserfs_info(super, | |
2654 | "journal_init_dev: journal device: %s\n", | |
2655 | bdevname(journal->j_dev_bd, b)); | |
2656 | return 0; | |
1da177e4 LT |
2657 | } |
2658 | ||
098297b2 | 2659 | /* |
cf3d0b81 ES |
2660 | * When creating/tuning a file system user can assign some |
2661 | * journal params within boundaries which depend on the ratio | |
2662 | * blocksize/standard_blocksize. | |
2663 | * | |
2664 | * For blocks >= standard_blocksize transaction size should | |
2665 | * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more | |
2666 | * then JOURNAL_TRANS_MAX_DEFAULT. | |
2667 | * | |
2668 | * For blocks < standard_blocksize these boundaries should be | |
2669 | * decreased proportionally. | |
2670 | */ | |
2671 | #define REISERFS_STANDARD_BLKSIZE (4096) | |
2672 | ||
a9dd3643 | 2673 | static int check_advise_trans_params(struct super_block *sb, |
cf3d0b81 ES |
2674 | struct reiserfs_journal *journal) |
2675 | { | |
2676 | if (journal->j_trans_max) { | |
098297b2 | 2677 | /* Non-default journal params. Do sanity check for them. */ |
cf3d0b81 | 2678 | int ratio = 1; |
a9dd3643 JM |
2679 | if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) |
2680 | ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; | |
cf3d0b81 ES |
2681 | |
2682 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || | |
2683 | journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || | |
a9dd3643 | 2684 | SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < |
cf3d0b81 | 2685 | JOURNAL_MIN_RATIO) { |
a9dd3643 | 2686 | reiserfs_warning(sb, "sh-462", |
45b03d5e JM |
2687 | "bad transaction max size (%u). " |
2688 | "FSCK?", journal->j_trans_max); | |
cf3d0b81 ES |
2689 | return 1; |
2690 | } | |
2691 | if (journal->j_max_batch != (journal->j_trans_max) * | |
2692 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { | |
a9dd3643 | 2693 | reiserfs_warning(sb, "sh-463", |
45b03d5e JM |
2694 | "bad transaction max batch (%u). " |
2695 | "FSCK?", journal->j_max_batch); | |
cf3d0b81 ES |
2696 | return 1; |
2697 | } | |
2698 | } else { | |
098297b2 JM |
2699 | /* |
2700 | * Default journal params. | |
2701 | * The file system was created by old version | |
2702 | * of mkreiserfs, so some fields contain zeros, | |
2703 | * and we need to advise proper values for them | |
2704 | */ | |
a9dd3643 JM |
2705 | if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { |
2706 | reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", | |
2707 | sb->s_blocksize); | |
45b03d5e JM |
2708 | return 1; |
2709 | } | |
cf3d0b81 ES |
2710 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; |
2711 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; | |
2712 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; | |
2713 | } | |
2714 | return 0; | |
2715 | } | |
2716 | ||
098297b2 | 2717 | /* must be called once on fs mount. calls journal_read for you */ |
a9dd3643 | 2718 | int journal_init(struct super_block *sb, const char *j_dev_name, |
bd4c625c LT |
2719 | int old_format, unsigned int commit_max_age) |
2720 | { | |
a9dd3643 | 2721 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; |
bd4c625c LT |
2722 | struct buffer_head *bhjh; |
2723 | struct reiserfs_super_block *rs; | |
2724 | struct reiserfs_journal_header *jh; | |
2725 | struct reiserfs_journal *journal; | |
2726 | struct reiserfs_journal_list *jl; | |
2727 | char b[BDEVNAME_SIZE]; | |
98ea3f50 | 2728 | int ret; |
bd4c625c | 2729 | |
558feb08 | 2730 | journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); |
bd4c625c | 2731 | if (!journal) { |
a9dd3643 | 2732 | reiserfs_warning(sb, "journal-1256", |
45b03d5e | 2733 | "unable to get memory for journal structure"); |
bd4c625c LT |
2734 | return 1; |
2735 | } | |
bd4c625c LT |
2736 | INIT_LIST_HEAD(&journal->j_bitmap_nodes); |
2737 | INIT_LIST_HEAD(&journal->j_prealloc_list); | |
2738 | INIT_LIST_HEAD(&journal->j_working_list); | |
2739 | INIT_LIST_HEAD(&journal->j_journal_list); | |
2740 | journal->j_persistent_trans = 0; | |
37c69b98 FW |
2741 | if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, |
2742 | reiserfs_bmap_count(sb))) | |
bd4c625c | 2743 | goto free_and_return; |
98ea3f50 | 2744 | |
a9dd3643 | 2745 | allocate_bitmap_nodes(sb); |
bd4c625c LT |
2746 | |
2747 | /* reserved for journal area support */ | |
a9dd3643 | 2748 | SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? |
bd4c625c | 2749 | REISERFS_OLD_DISK_OFFSET_IN_BYTES |
a9dd3643 JM |
2750 | / sb->s_blocksize + |
2751 | reiserfs_bmap_count(sb) + | |
bd4c625c LT |
2752 | 1 : |
2753 | REISERFS_DISK_OFFSET_IN_BYTES / | |
a9dd3643 | 2754 | sb->s_blocksize + 2); |
bd4c625c | 2755 | |
098297b2 JM |
2756 | /* |
2757 | * Sanity check to see is the standard journal fitting | |
2758 | * within first bitmap (actual for small blocksizes) | |
2759 | */ | |
a9dd3643 JM |
2760 | if (!SB_ONDISK_JOURNAL_DEVICE(sb) && |
2761 | (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + | |
2762 | SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { | |
2763 | reiserfs_warning(sb, "journal-1393", | |
45b03d5e JM |
2764 | "journal does not fit for area addressed " |
2765 | "by first of bitmap blocks. It starts at " | |
bd4c625c | 2766 | "%u and its size is %u. Block size %ld", |
a9dd3643 JM |
2767 | SB_JOURNAL_1st_RESERVED_BLOCK(sb), |
2768 | SB_ONDISK_JOURNAL_SIZE(sb), | |
2769 | sb->s_blocksize); | |
bd4c625c LT |
2770 | goto free_and_return; |
2771 | } | |
2772 | ||
a9dd3643 JM |
2773 | if (journal_init_dev(sb, journal, j_dev_name) != 0) { |
2774 | reiserfs_warning(sb, "sh-462", | |
6774def6 | 2775 | "unable to initialize journal device"); |
bd4c625c LT |
2776 | goto free_and_return; |
2777 | } | |
2778 | ||
a9dd3643 | 2779 | rs = SB_DISK_SUPER_BLOCK(sb); |
bd4c625c LT |
2780 | |
2781 | /* read journal header */ | |
a9dd3643 JM |
2782 | bhjh = journal_bread(sb, |
2783 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2784 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2785 | if (!bhjh) { |
a9dd3643 | 2786 | reiserfs_warning(sb, "sh-459", |
45b03d5e | 2787 | "unable to read journal header"); |
bd4c625c LT |
2788 | goto free_and_return; |
2789 | } | |
2790 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); | |
2791 | ||
2792 | /* make sure that journal matches to the super block */ | |
2793 | if (is_reiserfs_jr(rs) | |
2794 | && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != | |
2795 | sb_jp_journal_magic(rs))) { | |
a9dd3643 | 2796 | reiserfs_warning(sb, "sh-460", |
45b03d5e JM |
2797 | "journal header magic %x (device %s) does " |
2798 | "not match to magic found in super block %x", | |
2799 | jh->jh_journal.jp_journal_magic, | |
bd4c625c LT |
2800 | bdevname(journal->j_dev_bd, b), |
2801 | sb_jp_journal_magic(rs)); | |
2802 | brelse(bhjh); | |
2803 | goto free_and_return; | |
2804 | } | |
2805 | ||
2806 | journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); | |
2807 | journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); | |
2808 | journal->j_max_commit_age = | |
2809 | le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); | |
2810 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
2811 | ||
a9dd3643 | 2812 | if (check_advise_trans_params(sb, journal) != 0) |
cf3d0b81 | 2813 | goto free_and_return; |
bd4c625c LT |
2814 | journal->j_default_max_commit_age = journal->j_max_commit_age; |
2815 | ||
2816 | if (commit_max_age != 0) { | |
2817 | journal->j_max_commit_age = commit_max_age; | |
2818 | journal->j_max_trans_age = commit_max_age; | |
2819 | } | |
2820 | ||
a9dd3643 | 2821 | reiserfs_info(sb, "journal params: device %s, size %u, " |
bd4c625c LT |
2822 | "journal first block %u, max trans len %u, max batch %u, " |
2823 | "max commit age %u, max trans age %u\n", | |
2824 | bdevname(journal->j_dev_bd, b), | |
a9dd3643 JM |
2825 | SB_ONDISK_JOURNAL_SIZE(sb), |
2826 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), | |
bd4c625c LT |
2827 | journal->j_trans_max, |
2828 | journal->j_max_batch, | |
2829 | journal->j_max_commit_age, journal->j_max_trans_age); | |
2830 | ||
2831 | brelse(bhjh); | |
2832 | ||
2833 | journal->j_list_bitmap_index = 0; | |
a9dd3643 | 2834 | journal_list_init(sb); |
bd4c625c LT |
2835 | |
2836 | memset(journal->j_list_hash_table, 0, | |
2837 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
2838 | ||
2839 | INIT_LIST_HEAD(&journal->j_dirty_buffers); | |
2840 | spin_lock_init(&journal->j_dirty_buffers_lock); | |
2841 | ||
2842 | journal->j_start = 0; | |
2843 | journal->j_len = 0; | |
2844 | journal->j_len_alloc = 0; | |
a228bf8f JM |
2845 | atomic_set(&journal->j_wcount, 0); |
2846 | atomic_set(&journal->j_async_throttle, 0); | |
bd4c625c LT |
2847 | journal->j_bcount = 0; |
2848 | journal->j_trans_start_time = 0; | |
2849 | journal->j_last = NULL; | |
2850 | journal->j_first = NULL; | |
a228bf8f | 2851 | init_waitqueue_head(&journal->j_join_wait); |
f68215c4 | 2852 | mutex_init(&journal->j_mutex); |
afe70259 | 2853 | mutex_init(&journal->j_flush_mutex); |
bd4c625c LT |
2854 | |
2855 | journal->j_trans_id = 10; | |
2856 | journal->j_mount_id = 10; | |
2857 | journal->j_state = 0; | |
a228bf8f | 2858 | atomic_set(&journal->j_jlock, 0); |
bd4c625c LT |
2859 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes); |
2860 | journal->j_cnode_free_orig = journal->j_cnode_free_list; | |
2861 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; | |
2862 | journal->j_cnode_used = 0; | |
2863 | journal->j_must_wait = 0; | |
2864 | ||
576f6d79 | 2865 | if (journal->j_cnode_free == 0) { |
a9dd3643 | 2866 | reiserfs_warning(sb, "journal-2004", "Journal cnode memory " |
576f6d79 JM |
2867 | "allocation failed (%ld bytes). Journal is " |
2868 | "too large for available memory. Usually " | |
2869 | "this is due to a journal that is too large.", | |
2870 | sizeof (struct reiserfs_journal_cnode) * num_cnodes); | |
2871 | goto free_and_return; | |
2872 | } | |
2873 | ||
a9dd3643 | 2874 | init_journal_hash(sb); |
bd4c625c | 2875 | jl = journal->j_current_jl; |
37c69b98 FW |
2876 | |
2877 | /* | |
2878 | * get_list_bitmap() may call flush_commit_list() which | |
2879 | * requires the lock. Calling flush_commit_list() shouldn't happen | |
2880 | * this early but I like to be paranoid. | |
2881 | */ | |
2882 | reiserfs_write_lock(sb); | |
a9dd3643 | 2883 | jl->j_list_bitmap = get_list_bitmap(sb, jl); |
37c69b98 | 2884 | reiserfs_write_unlock(sb); |
bd4c625c | 2885 | if (!jl->j_list_bitmap) { |
a9dd3643 | 2886 | reiserfs_warning(sb, "journal-2005", |
45b03d5e | 2887 | "get_list_bitmap failed for journal list 0"); |
bd4c625c LT |
2888 | goto free_and_return; |
2889 | } | |
37c69b98 | 2890 | |
37c69b98 | 2891 | ret = journal_read(sb); |
37c69b98 | 2892 | if (ret < 0) { |
a9dd3643 | 2893 | reiserfs_warning(sb, "reiserfs-2006", |
45b03d5e | 2894 | "Replay Failure, unable to mount"); |
bd4c625c LT |
2895 | goto free_and_return; |
2896 | } | |
2897 | ||
c4028958 | 2898 | INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); |
a9dd3643 | 2899 | journal->j_work_sb = sb; |
bd4c625c | 2900 | return 0; |
cf776a7a | 2901 | free_and_return: |
a9dd3643 | 2902 | free_journal_ram(sb); |
bd4c625c | 2903 | return 1; |
1da177e4 LT |
2904 | } |
2905 | ||
2906 | /* | |
098297b2 JM |
2907 | * test for a polite end of the current transaction. Used by file_write, |
2908 | * and should be used by delete to make sure they don't write more than | |
2909 | * can fit inside a single transaction | |
2910 | */ | |
bd4c625c LT |
2911 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, |
2912 | int new_alloc) | |
2913 | { | |
2914 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2915 | time_t now = get_seconds(); | |
2916 | /* cannot restart while nested */ | |
2917 | BUG_ON(!th->t_trans_id); | |
2918 | if (th->t_refcount > 1) | |
2919 | return 0; | |
2920 | if (journal->j_must_wait > 0 || | |
2921 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || | |
a228bf8f | 2922 | atomic_read(&journal->j_jlock) || |
bd4c625c LT |
2923 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || |
2924 | journal->j_cnode_free < (journal->j_trans_max * 3)) { | |
2925 | return 1; | |
2926 | } | |
b18c1c6e | 2927 | |
6ae1ea44 CM |
2928 | journal->j_len_alloc += new_alloc; |
2929 | th->t_blocks_allocated += new_alloc ; | |
bd4c625c | 2930 | return 0; |
1da177e4 LT |
2931 | } |
2932 | ||
098297b2 | 2933 | /* this must be called inside a transaction */ |
bd4c625c LT |
2934 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) |
2935 | { | |
2936 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2937 | BUG_ON(!th->t_trans_id); | |
2938 | journal->j_must_wait = 1; | |
2939 | set_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2940 | return; | |
1da177e4 LT |
2941 | } |
2942 | ||
098297b2 | 2943 | /* this must be called without a transaction started */ |
bd4c625c LT |
2944 | void reiserfs_allow_writes(struct super_block *s) |
2945 | { | |
2946 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2947 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2948 | wake_up(&journal->j_join_wait); | |
1da177e4 LT |
2949 | } |
2950 | ||
098297b2 | 2951 | /* this must be called without a transaction started */ |
bd4c625c LT |
2952 | void reiserfs_wait_on_write_block(struct super_block *s) |
2953 | { | |
2954 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2955 | wait_event(journal->j_join_wait, | |
2956 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); | |
2957 | } | |
2958 | ||
2959 | static void queue_log_writer(struct super_block *s) | |
2960 | { | |
2961 | wait_queue_t wait; | |
2962 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2963 | set_bit(J_WRITERS_QUEUED, &journal->j_state); | |
2964 | ||
2965 | /* | |
2966 | * we don't want to use wait_event here because | |
2967 | * we only want to wait once. | |
2968 | */ | |
2969 | init_waitqueue_entry(&wait, current); | |
2970 | add_wait_queue(&journal->j_join_wait, &wait); | |
1da177e4 | 2971 | set_current_state(TASK_UNINTERRUPTIBLE); |
8ebc4232 | 2972 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { |
278f6679 | 2973 | int depth = reiserfs_write_unlock_nested(s); |
bd4c625c | 2974 | schedule(); |
278f6679 | 2975 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 2976 | } |
5ab2f7e0 | 2977 | __set_current_state(TASK_RUNNING); |
bd4c625c LT |
2978 | remove_wait_queue(&journal->j_join_wait, &wait); |
2979 | } | |
2980 | ||
2981 | static void wake_queued_writers(struct super_block *s) | |
2982 | { | |
2983 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2984 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2985 | wake_up(&journal->j_join_wait); | |
2986 | } | |
2987 | ||
600ed416 | 2988 | static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) |
bd4c625c LT |
2989 | { |
2990 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
2991 | unsigned long bcount = journal->j_bcount; | |
2992 | while (1) { | |
278f6679 JM |
2993 | int depth; |
2994 | ||
2995 | depth = reiserfs_write_unlock_nested(sb); | |
041e0e3b | 2996 | schedule_timeout_uninterruptible(1); |
278f6679 JM |
2997 | reiserfs_write_lock_nested(sb, depth); |
2998 | ||
bd4c625c LT |
2999 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; |
3000 | while ((atomic_read(&journal->j_wcount) > 0 || | |
3001 | atomic_read(&journal->j_jlock)) && | |
3002 | journal->j_trans_id == trans_id) { | |
3003 | queue_log_writer(sb); | |
3004 | } | |
3005 | if (journal->j_trans_id != trans_id) | |
3006 | break; | |
3007 | if (bcount == journal->j_bcount) | |
3008 | break; | |
3009 | bcount = journal->j_bcount; | |
1da177e4 | 3010 | } |
1da177e4 LT |
3011 | } |
3012 | ||
098297b2 JM |
3013 | /* |
3014 | * join == true if you must join an existing transaction. | |
3015 | * join == false if you can deal with waiting for others to finish | |
3016 | * | |
3017 | * this will block until the transaction is joinable. send the number of | |
3018 | * blocks you expect to use in nblocks. | |
1da177e4 | 3019 | */ |
bd4c625c | 3020 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3021 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3022 | int join) |
3023 | { | |
3024 | time_t now = get_seconds(); | |
600ed416 | 3025 | unsigned int old_trans_id; |
a9dd3643 | 3026 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3027 | struct reiserfs_transaction_handle myth; |
3028 | int sched_count = 0; | |
3029 | int retval; | |
278f6679 | 3030 | int depth; |
bd4c625c | 3031 | |
a9dd3643 | 3032 | reiserfs_check_lock_depth(sb, "journal_begin"); |
14a61442 | 3033 | BUG_ON(nblocks > journal->j_trans_max); |
bd4c625c | 3034 | |
a9dd3643 | 3035 | PROC_INFO_INC(sb, journal.journal_being); |
bd4c625c LT |
3036 | /* set here for journal_join */ |
3037 | th->t_refcount = 1; | |
a9dd3643 | 3038 | th->t_super = sb; |
bd4c625c | 3039 | |
cf776a7a | 3040 | relock: |
a9dd3643 | 3041 | lock_journal(sb); |
bd4c625c | 3042 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { |
a9dd3643 | 3043 | unlock_journal(sb); |
bd4c625c LT |
3044 | retval = journal->j_errno; |
3045 | goto out_fail; | |
3046 | } | |
3047 | journal->j_bcount++; | |
3048 | ||
3049 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { | |
a9dd3643 | 3050 | unlock_journal(sb); |
278f6679 | 3051 | depth = reiserfs_write_unlock_nested(sb); |
a9dd3643 | 3052 | reiserfs_wait_on_write_block(sb); |
278f6679 | 3053 | reiserfs_write_lock_nested(sb, depth); |
a9dd3643 | 3054 | PROC_INFO_INC(sb, journal.journal_relock_writers); |
bd4c625c LT |
3055 | goto relock; |
3056 | } | |
3057 | now = get_seconds(); | |
3058 | ||
098297b2 JM |
3059 | /* |
3060 | * if there is no room in the journal OR | |
3061 | * if this transaction is too old, and we weren't called joinable, | |
3062 | * wait for it to finish before beginning we don't sleep if there | |
3063 | * aren't other writers | |
bd4c625c LT |
3064 | */ |
3065 | ||
3066 | if ((!join && journal->j_must_wait > 0) || | |
3067 | (!join | |
3068 | && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) | |
3069 | || (!join && atomic_read(&journal->j_wcount) > 0 | |
3070 | && journal->j_trans_start_time > 0 | |
3071 | && (now - journal->j_trans_start_time) > | |
3072 | journal->j_max_trans_age) || (!join | |
3073 | && atomic_read(&journal->j_jlock)) | |
3074 | || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { | |
3075 | ||
3076 | old_trans_id = journal->j_trans_id; | |
098297b2 JM |
3077 | /* allow others to finish this transaction */ |
3078 | unlock_journal(sb); | |
bd4c625c LT |
3079 | |
3080 | if (!join && (journal->j_len_alloc + nblocks + 2) >= | |
3081 | journal->j_max_batch && | |
3082 | ((journal->j_len + nblocks + 2) * 100) < | |
3083 | (journal->j_len_alloc * 75)) { | |
3084 | if (atomic_read(&journal->j_wcount) > 10) { | |
3085 | sched_count++; | |
a9dd3643 | 3086 | queue_log_writer(sb); |
bd4c625c LT |
3087 | goto relock; |
3088 | } | |
3089 | } | |
098297b2 JM |
3090 | /* |
3091 | * don't mess with joining the transaction if all we | |
3092 | * have to do is wait for someone else to do a commit | |
bd4c625c LT |
3093 | */ |
3094 | if (atomic_read(&journal->j_jlock)) { | |
3095 | while (journal->j_trans_id == old_trans_id && | |
3096 | atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3097 | queue_log_writer(sb); |
bd4c625c LT |
3098 | } |
3099 | goto relock; | |
3100 | } | |
b491dd17 | 3101 | retval = journal_join(&myth, sb); |
bd4c625c LT |
3102 | if (retval) |
3103 | goto out_fail; | |
3104 | ||
3105 | /* someone might have ended the transaction while we joined */ | |
3106 | if (old_trans_id != journal->j_trans_id) { | |
58d85426 | 3107 | retval = do_journal_end(&myth, 0); |
bd4c625c | 3108 | } else { |
58d85426 | 3109 | retval = do_journal_end(&myth, COMMIT_NOW); |
bd4c625c LT |
3110 | } |
3111 | ||
3112 | if (retval) | |
3113 | goto out_fail; | |
3114 | ||
a9dd3643 | 3115 | PROC_INFO_INC(sb, journal.journal_relock_wcount); |
bd4c625c LT |
3116 | goto relock; |
3117 | } | |
3118 | /* we are the first writer, set trans_id */ | |
3119 | if (journal->j_trans_start_time == 0) { | |
3120 | journal->j_trans_start_time = get_seconds(); | |
3121 | } | |
a228bf8f | 3122 | atomic_inc(&journal->j_wcount); |
bd4c625c LT |
3123 | journal->j_len_alloc += nblocks; |
3124 | th->t_blocks_logged = 0; | |
3125 | th->t_blocks_allocated = nblocks; | |
3126 | th->t_trans_id = journal->j_trans_id; | |
a9dd3643 | 3127 | unlock_journal(sb); |
bd4c625c | 3128 | INIT_LIST_HEAD(&th->t_list); |
bd4c625c LT |
3129 | return 0; |
3130 | ||
cf776a7a | 3131 | out_fail: |
bd4c625c | 3132 | memset(th, 0, sizeof(*th)); |
098297b2 JM |
3133 | /* |
3134 | * Re-set th->t_super, so we can properly keep track of how many | |
bd4c625c | 3135 | * persistent transactions there are. We need to do this so if this |
098297b2 JM |
3136 | * call is part of a failed restart_transaction, we can free it later |
3137 | */ | |
a9dd3643 | 3138 | th->t_super = sb; |
bd4c625c LT |
3139 | return retval; |
3140 | } | |
3141 | ||
3142 | struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct | |
3143 | super_block | |
3144 | *s, | |
3145 | int nblocks) | |
3146 | { | |
3147 | int ret; | |
3148 | struct reiserfs_transaction_handle *th; | |
3149 | ||
098297b2 JM |
3150 | /* |
3151 | * if we're nesting into an existing transaction. It will be | |
3152 | * persistent on its own | |
bd4c625c LT |
3153 | */ |
3154 | if (reiserfs_transaction_running(s)) { | |
3155 | th = current->journal_info; | |
3156 | th->t_refcount++; | |
14a61442 | 3157 | BUG_ON(th->t_refcount < 2); |
098297b2 | 3158 | |
bd4c625c LT |
3159 | return th; |
3160 | } | |
d739b42b | 3161 | th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); |
bd4c625c LT |
3162 | if (!th) |
3163 | return NULL; | |
3164 | ret = journal_begin(th, s, nblocks); | |
3165 | if (ret) { | |
d739b42b | 3166 | kfree(th); |
bd4c625c LT |
3167 | return NULL; |
3168 | } | |
3169 | ||
3170 | SB_JOURNAL(s)->j_persistent_trans++; | |
3171 | return th; | |
3172 | } | |
3173 | ||
3174 | int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) | |
3175 | { | |
3176 | struct super_block *s = th->t_super; | |
3177 | int ret = 0; | |
3178 | if (th->t_trans_id) | |
58d85426 | 3179 | ret = journal_end(th); |
bd4c625c LT |
3180 | else |
3181 | ret = -EIO; | |
3182 | if (th->t_refcount == 0) { | |
3183 | SB_JOURNAL(s)->j_persistent_trans--; | |
d739b42b | 3184 | kfree(th); |
bd4c625c LT |
3185 | } |
3186 | return ret; | |
3187 | } | |
3188 | ||
3189 | static int journal_join(struct reiserfs_transaction_handle *th, | |
b491dd17 | 3190 | struct super_block *sb) |
bd4c625c LT |
3191 | { |
3192 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3193 | ||
098297b2 JM |
3194 | /* |
3195 | * this keeps do_journal_end from NULLing out the | |
3196 | * current->journal_info pointer | |
bd4c625c LT |
3197 | */ |
3198 | th->t_handle_save = cur_th; | |
14a61442 | 3199 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
b491dd17 | 3200 | return do_journal_begin_r(th, sb, 1, JBEGIN_JOIN); |
bd4c625c LT |
3201 | } |
3202 | ||
3203 | int journal_join_abort(struct reiserfs_transaction_handle *th, | |
b491dd17 | 3204 | struct super_block *sb) |
bd4c625c LT |
3205 | { |
3206 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3207 | ||
098297b2 JM |
3208 | /* |
3209 | * this keeps do_journal_end from NULLing out the | |
3210 | * current->journal_info pointer | |
bd4c625c LT |
3211 | */ |
3212 | th->t_handle_save = cur_th; | |
14a61442 | 3213 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
b491dd17 | 3214 | return do_journal_begin_r(th, sb, 1, JBEGIN_ABORT); |
bd4c625c LT |
3215 | } |
3216 | ||
3217 | int journal_begin(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3218 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3219 | { |
3220 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3221 | int ret; | |
3222 | ||
3223 | th->t_handle_save = NULL; | |
3224 | if (cur_th) { | |
3225 | /* we are nesting into the current transaction */ | |
a9dd3643 | 3226 | if (cur_th->t_super == sb) { |
bd4c625c LT |
3227 | BUG_ON(!cur_th->t_refcount); |
3228 | cur_th->t_refcount++; | |
3229 | memcpy(th, cur_th, sizeof(*th)); | |
3230 | if (th->t_refcount <= 1) | |
a9dd3643 | 3231 | reiserfs_warning(sb, "reiserfs-2005", |
45b03d5e JM |
3232 | "BAD: refcount <= 1, but " |
3233 | "journal_info != 0"); | |
bd4c625c LT |
3234 | return 0; |
3235 | } else { | |
098297b2 JM |
3236 | /* |
3237 | * we've ended up with a handle from a different | |
3238 | * filesystem. save it and restore on journal_end. | |
3239 | * This should never really happen... | |
bd4c625c | 3240 | */ |
a9dd3643 | 3241 | reiserfs_warning(sb, "clm-2100", |
45b03d5e | 3242 | "nesting info a different FS"); |
bd4c625c LT |
3243 | th->t_handle_save = current->journal_info; |
3244 | current->journal_info = th; | |
3245 | } | |
1da177e4 | 3246 | } else { |
bd4c625c LT |
3247 | current->journal_info = th; |
3248 | } | |
a9dd3643 | 3249 | ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); |
14a61442 | 3250 | BUG_ON(current->journal_info != th); |
1da177e4 | 3251 | |
098297b2 JM |
3252 | /* |
3253 | * I guess this boils down to being the reciprocal of clm-2100 above. | |
3254 | * If do_journal_begin_r fails, we need to put it back, since | |
3255 | * journal_end won't be called to do it. */ | |
bd4c625c LT |
3256 | if (ret) |
3257 | current->journal_info = th->t_handle_save; | |
3258 | else | |
3259 | BUG_ON(!th->t_refcount); | |
1da177e4 | 3260 | |
bd4c625c | 3261 | return ret; |
1da177e4 LT |
3262 | } |
3263 | ||
3264 | /* | |
098297b2 JM |
3265 | * puts bh into the current transaction. If it was already there, reorders |
3266 | * removes the old pointers from the hash, and puts new ones in (to make | |
3267 | * sure replay happen in the right order). | |
3268 | * | |
3269 | * if it was dirty, cleans and files onto the clean list. I can't let it | |
3270 | * be dirty again until the transaction is committed. | |
3271 | * | |
3272 | * if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. | |
3273 | */ | |
bd4c625c | 3274 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, |
09f1b80b | 3275 | struct buffer_head *bh) |
bd4c625c | 3276 | { |
09f1b80b | 3277 | struct super_block *sb = th->t_super; |
a9dd3643 | 3278 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3279 | struct reiserfs_journal_cnode *cn = NULL; |
3280 | int count_already_incd = 0; | |
3281 | int prepared = 0; | |
3282 | BUG_ON(!th->t_trans_id); | |
3283 | ||
a9dd3643 | 3284 | PROC_INFO_INC(sb, journal.mark_dirty); |
bd4c625c | 3285 | if (th->t_trans_id != journal->j_trans_id) { |
c3a9c210 JM |
3286 | reiserfs_panic(th->t_super, "journal-1577", |
3287 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3288 | th->t_trans_id, journal->j_trans_id); |
3289 | } | |
3290 | ||
bd4c625c LT |
3291 | prepared = test_clear_buffer_journal_prepared(bh); |
3292 | clear_buffer_journal_restore_dirty(bh); | |
3293 | /* already in this transaction, we are done */ | |
3294 | if (buffer_journaled(bh)) { | |
a9dd3643 | 3295 | PROC_INFO_INC(sb, journal.mark_dirty_already); |
bd4c625c LT |
3296 | return 0; |
3297 | } | |
3298 | ||
098297b2 JM |
3299 | /* |
3300 | * this must be turned into a panic instead of a warning. We can't | |
3301 | * allow a dirty or journal_dirty or locked buffer to be logged, as | |
3302 | * some changes could get to disk too early. NOT GOOD. | |
bd4c625c LT |
3303 | */ |
3304 | if (!prepared || buffer_dirty(bh)) { | |
a9dd3643 | 3305 | reiserfs_warning(sb, "journal-1777", |
45b03d5e | 3306 | "buffer %llu bad state " |
bd4c625c LT |
3307 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", |
3308 | (unsigned long long)bh->b_blocknr, | |
3309 | prepared ? ' ' : '!', | |
3310 | buffer_locked(bh) ? ' ' : '!', | |
3311 | buffer_dirty(bh) ? ' ' : '!', | |
3312 | buffer_journal_dirty(bh) ? ' ' : '!'); | |
3313 | } | |
3314 | ||
a228bf8f | 3315 | if (atomic_read(&journal->j_wcount) <= 0) { |
a9dd3643 | 3316 | reiserfs_warning(sb, "journal-1409", |
45b03d5e | 3317 | "returning because j_wcount was %d", |
a228bf8f | 3318 | atomic_read(&journal->j_wcount)); |
bd4c625c LT |
3319 | return 1; |
3320 | } | |
098297b2 JM |
3321 | /* |
3322 | * this error means I've screwed up, and we've overflowed | |
3323 | * the transaction. Nothing can be done here, except make the | |
3324 | * FS readonly or panic. | |
bd4c625c LT |
3325 | */ |
3326 | if (journal->j_len >= journal->j_trans_max) { | |
c3a9c210 JM |
3327 | reiserfs_panic(th->t_super, "journal-1413", |
3328 | "j_len (%lu) is too big", | |
bd4c625c LT |
3329 | journal->j_len); |
3330 | } | |
3331 | ||
3332 | if (buffer_journal_dirty(bh)) { | |
3333 | count_already_incd = 1; | |
a9dd3643 | 3334 | PROC_INFO_INC(sb, journal.mark_dirty_notjournal); |
bd4c625c LT |
3335 | clear_buffer_journal_dirty(bh); |
3336 | } | |
3337 | ||
3338 | if (journal->j_len > journal->j_len_alloc) { | |
3339 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; | |
3340 | } | |
3341 | ||
3342 | set_buffer_journaled(bh); | |
3343 | ||
3344 | /* now put this guy on the end */ | |
3345 | if (!cn) { | |
a9dd3643 | 3346 | cn = get_cnode(sb); |
bd4c625c | 3347 | if (!cn) { |
a9dd3643 | 3348 | reiserfs_panic(sb, "journal-4", "get_cnode failed!"); |
bd4c625c LT |
3349 | } |
3350 | ||
3351 | if (th->t_blocks_logged == th->t_blocks_allocated) { | |
3352 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; | |
3353 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; | |
3354 | } | |
3355 | th->t_blocks_logged++; | |
3356 | journal->j_len++; | |
3357 | ||
3358 | cn->bh = bh; | |
3359 | cn->blocknr = bh->b_blocknr; | |
a9dd3643 | 3360 | cn->sb = sb; |
bd4c625c LT |
3361 | cn->jlist = NULL; |
3362 | insert_journal_hash(journal->j_hash_table, cn); | |
3363 | if (!count_already_incd) { | |
3364 | get_bh(bh); | |
3365 | } | |
3366 | } | |
3367 | cn->next = NULL; | |
3368 | cn->prev = journal->j_last; | |
3369 | cn->bh = bh; | |
3370 | if (journal->j_last) { | |
3371 | journal->j_last->next = cn; | |
3372 | journal->j_last = cn; | |
3373 | } else { | |
3374 | journal->j_first = cn; | |
3375 | journal->j_last = cn; | |
3376 | } | |
033369d1 | 3377 | reiserfs_schedule_old_flush(sb); |
bd4c625c LT |
3378 | return 0; |
3379 | } | |
3380 | ||
58d85426 | 3381 | int journal_end(struct reiserfs_transaction_handle *th) |
bd4c625c | 3382 | { |
58d85426 | 3383 | struct super_block *sb = th->t_super; |
bd4c625c | 3384 | if (!current->journal_info && th->t_refcount > 1) |
a9dd3643 | 3385 | reiserfs_warning(sb, "REISER-NESTING", |
45b03d5e | 3386 | "th NULL, refcount %d", th->t_refcount); |
bd4c625c LT |
3387 | |
3388 | if (!th->t_trans_id) { | |
3389 | WARN_ON(1); | |
3390 | return -EIO; | |
3391 | } | |
3392 | ||
3393 | th->t_refcount--; | |
3394 | if (th->t_refcount > 0) { | |
3395 | struct reiserfs_transaction_handle *cur_th = | |
3396 | current->journal_info; | |
3397 | ||
098297b2 JM |
3398 | /* |
3399 | * we aren't allowed to close a nested transaction on a | |
3400 | * different filesystem from the one in the task struct | |
bd4c625c | 3401 | */ |
14a61442 | 3402 | BUG_ON(cur_th->t_super != th->t_super); |
bd4c625c LT |
3403 | |
3404 | if (th != cur_th) { | |
3405 | memcpy(current->journal_info, th, sizeof(*th)); | |
3406 | th->t_trans_id = 0; | |
3407 | } | |
3408 | return 0; | |
3409 | } else { | |
58d85426 | 3410 | return do_journal_end(th, 0); |
bd4c625c | 3411 | } |
1da177e4 LT |
3412 | } |
3413 | ||
098297b2 JM |
3414 | /* |
3415 | * removes from the current transaction, relsing and descrementing any counters. | |
3416 | * also files the removed buffer directly onto the clean list | |
3417 | * | |
3418 | * called by journal_mark_freed when a block has been deleted | |
3419 | * | |
3420 | * returns 1 if it cleaned and relsed the buffer. 0 otherwise | |
3421 | */ | |
a9dd3643 | 3422 | static int remove_from_transaction(struct super_block *sb, |
bd4c625c LT |
3423 | b_blocknr_t blocknr, int already_cleaned) |
3424 | { | |
3425 | struct buffer_head *bh; | |
3426 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3427 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3428 | int ret = 0; |
3429 | ||
a9dd3643 | 3430 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3431 | if (!cn || !cn->bh) { |
3432 | return ret; | |
3433 | } | |
3434 | bh = cn->bh; | |
3435 | if (cn->prev) { | |
3436 | cn->prev->next = cn->next; | |
3437 | } | |
3438 | if (cn->next) { | |
3439 | cn->next->prev = cn->prev; | |
3440 | } | |
3441 | if (cn == journal->j_first) { | |
3442 | journal->j_first = cn->next; | |
3443 | } | |
3444 | if (cn == journal->j_last) { | |
3445 | journal->j_last = cn->prev; | |
3446 | } | |
3447 | if (bh) | |
a9dd3643 | 3448 | remove_journal_hash(sb, journal->j_hash_table, NULL, |
bd4c625c LT |
3449 | bh->b_blocknr, 0); |
3450 | clear_buffer_journaled(bh); /* don't log this one */ | |
3451 | ||
3452 | if (!already_cleaned) { | |
3453 | clear_buffer_journal_dirty(bh); | |
3454 | clear_buffer_dirty(bh); | |
3455 | clear_buffer_journal_test(bh); | |
3456 | put_bh(bh); | |
a228bf8f | 3457 | if (atomic_read(&bh->b_count) < 0) { |
a9dd3643 | 3458 | reiserfs_warning(sb, "journal-1752", |
45b03d5e | 3459 | "b_count < 0"); |
bd4c625c LT |
3460 | } |
3461 | ret = 1; | |
3462 | } | |
3463 | journal->j_len--; | |
3464 | journal->j_len_alloc--; | |
a9dd3643 | 3465 | free_cnode(sb, cn); |
bd4c625c | 3466 | return ret; |
1da177e4 LT |
3467 | } |
3468 | ||
3469 | /* | |
098297b2 JM |
3470 | * for any cnode in a journal list, it can only be dirtied of all the |
3471 | * transactions that include it are committed to disk. | |
3472 | * this checks through each transaction, and returns 1 if you are allowed | |
3473 | * to dirty, and 0 if you aren't | |
3474 | * | |
3475 | * it is called by dirty_journal_list, which is called after | |
3476 | * flush_commit_list has gotten all the log blocks for a given | |
3477 | * transaction on disk | |
3478 | * | |
3479 | */ | |
bd4c625c LT |
3480 | static int can_dirty(struct reiserfs_journal_cnode *cn) |
3481 | { | |
3482 | struct super_block *sb = cn->sb; | |
3483 | b_blocknr_t blocknr = cn->blocknr; | |
3484 | struct reiserfs_journal_cnode *cur = cn->hprev; | |
3485 | int can_dirty = 1; | |
3486 | ||
098297b2 JM |
3487 | /* |
3488 | * first test hprev. These are all newer than cn, so any node here | |
3489 | * with the same block number and dev means this node can't be sent | |
3490 | * to disk right now. | |
bd4c625c LT |
3491 | */ |
3492 | while (cur && can_dirty) { | |
3493 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && | |
3494 | cur->blocknr == blocknr) { | |
3495 | can_dirty = 0; | |
3496 | } | |
3497 | cur = cur->hprev; | |
3498 | } | |
098297b2 JM |
3499 | /* |
3500 | * then test hnext. These are all older than cn. As long as they | |
3501 | * are committed to the log, it is safe to write cn to disk | |
bd4c625c LT |
3502 | */ |
3503 | cur = cn->hnext; | |
3504 | while (cur && can_dirty) { | |
3505 | if (cur->jlist && cur->jlist->j_len > 0 && | |
a228bf8f | 3506 | atomic_read(&cur->jlist->j_commit_left) > 0 && cur->bh && |
bd4c625c LT |
3507 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { |
3508 | can_dirty = 0; | |
3509 | } | |
3510 | cur = cur->hnext; | |
3511 | } | |
3512 | return can_dirty; | |
1da177e4 LT |
3513 | } |
3514 | ||
098297b2 JM |
3515 | /* |
3516 | * syncs the commit blocks, but does not force the real buffers to disk | |
3517 | * will wait until the current transaction is done/committed before returning | |
3518 | */ | |
58d85426 | 3519 | int journal_end_sync(struct reiserfs_transaction_handle *th) |
bd4c625c | 3520 | { |
58d85426 | 3521 | struct super_block *sb = th->t_super; |
a9dd3643 | 3522 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 3523 | |
bd4c625c LT |
3524 | BUG_ON(!th->t_trans_id); |
3525 | /* you can sync while nested, very, very bad */ | |
14a61442 | 3526 | BUG_ON(th->t_refcount > 1); |
bd4c625c | 3527 | if (journal->j_len == 0) { |
a9dd3643 | 3528 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3529 | 1); |
09f1b80b | 3530 | journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3531 | } |
58d85426 | 3532 | return do_journal_end(th, COMMIT_NOW | WAIT); |
1da177e4 LT |
3533 | } |
3534 | ||
098297b2 | 3535 | /* writeback the pending async commits to disk */ |
c4028958 | 3536 | static void flush_async_commits(struct work_struct *work) |
bd4c625c | 3537 | { |
c4028958 DH |
3538 | struct reiserfs_journal *journal = |
3539 | container_of(work, struct reiserfs_journal, j_work.work); | |
a9dd3643 | 3540 | struct super_block *sb = journal->j_work_sb; |
bd4c625c LT |
3541 | struct reiserfs_journal_list *jl; |
3542 | struct list_head *entry; | |
3543 | ||
8ebc4232 | 3544 | reiserfs_write_lock(sb); |
bd4c625c LT |
3545 | if (!list_empty(&journal->j_journal_list)) { |
3546 | /* last entry is the youngest, commit it and you get everything */ | |
3547 | entry = journal->j_journal_list.prev; | |
3548 | jl = JOURNAL_LIST_ENTRY(entry); | |
a9dd3643 | 3549 | flush_commit_list(sb, jl, 1); |
bd4c625c | 3550 | } |
8ebc4232 | 3551 | reiserfs_write_unlock(sb); |
1da177e4 LT |
3552 | } |
3553 | ||
3554 | /* | |
098297b2 JM |
3555 | * flushes any old transactions to disk |
3556 | * ends the current transaction if it is too old | |
3557 | */ | |
25729b0e | 3558 | void reiserfs_flush_old_commits(struct super_block *sb) |
bd4c625c LT |
3559 | { |
3560 | time_t now; | |
3561 | struct reiserfs_transaction_handle th; | |
a9dd3643 | 3562 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3563 | |
3564 | now = get_seconds(); | |
098297b2 JM |
3565 | /* |
3566 | * safety check so we don't flush while we are replaying the log during | |
bd4c625c LT |
3567 | * mount |
3568 | */ | |
25729b0e AB |
3569 | if (list_empty(&journal->j_journal_list)) |
3570 | return; | |
bd4c625c | 3571 | |
098297b2 JM |
3572 | /* |
3573 | * check the current transaction. If there are no writers, and it is | |
bd4c625c LT |
3574 | * too old, finish it, and force the commit blocks to disk |
3575 | */ | |
3576 | if (atomic_read(&journal->j_wcount) <= 0 && | |
3577 | journal->j_trans_start_time > 0 && | |
3578 | journal->j_len > 0 && | |
3579 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
b491dd17 | 3580 | if (!journal_join(&th, sb)) { |
a9dd3643 JM |
3581 | reiserfs_prepare_for_journal(sb, |
3582 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 3583 | 1); |
09f1b80b | 3584 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3585 | |
098297b2 JM |
3586 | /* |
3587 | * we're only being called from kreiserfsd, it makes | |
3588 | * no sense to do an async commit so that kreiserfsd | |
3589 | * can do it later | |
bd4c625c | 3590 | */ |
58d85426 | 3591 | do_journal_end(&th, COMMIT_NOW | WAIT); |
bd4c625c LT |
3592 | } |
3593 | } | |
1da177e4 LT |
3594 | } |
3595 | ||
3596 | /* | |
098297b2 JM |
3597 | * returns 0 if do_journal_end should return right away, returns 1 if |
3598 | * do_journal_end should finish the commit | |
3599 | * | |
3600 | * if the current transaction is too old, but still has writers, this will | |
3601 | * wait on j_join_wait until all the writers are done. By the time it | |
3602 | * wakes up, the transaction it was called has already ended, so it just | |
3603 | * flushes the commit list and returns 0. | |
3604 | * | |
3605 | * Won't batch when flush or commit_now is set. Also won't batch when | |
3606 | * others are waiting on j_join_wait. | |
3607 | * | |
3608 | * Note, we can't allow the journal_end to proceed while there are still | |
3609 | * writers in the log. | |
3610 | */ | |
58d85426 | 3611 | static int check_journal_end(struct reiserfs_transaction_handle *th, int flags) |
bd4c625c LT |
3612 | { |
3613 | ||
3614 | time_t now; | |
3615 | int flush = flags & FLUSH_ALL; | |
3616 | int commit_now = flags & COMMIT_NOW; | |
3617 | int wait_on_commit = flags & WAIT; | |
3618 | struct reiserfs_journal_list *jl; | |
58d85426 | 3619 | struct super_block *sb = th->t_super; |
a9dd3643 | 3620 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3621 | |
3622 | BUG_ON(!th->t_trans_id); | |
3623 | ||
3624 | if (th->t_trans_id != journal->j_trans_id) { | |
c3a9c210 JM |
3625 | reiserfs_panic(th->t_super, "journal-1577", |
3626 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3627 | th->t_trans_id, journal->j_trans_id); |
3628 | } | |
3629 | ||
3630 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); | |
098297b2 | 3631 | /* <= 0 is allowed. unmounting might not call begin */ |
a228bf8f JM |
3632 | if (atomic_read(&journal->j_wcount) > 0) |
3633 | atomic_dec(&journal->j_wcount); | |
bd4c625c | 3634 | |
098297b2 JM |
3635 | /* |
3636 | * BUG, deal with case where j_len is 0, but people previously | |
3637 | * freed blocks need to be released will be dealt with by next | |
3638 | * transaction that actually writes something, but should be taken | |
3639 | * care of in this trans | |
bd4c625c | 3640 | */ |
14a61442 ES |
3641 | BUG_ON(journal->j_len == 0); |
3642 | ||
098297b2 JM |
3643 | /* |
3644 | * if wcount > 0, and we are called to with flush or commit_now, | |
3645 | * we wait on j_join_wait. We will wake up when the last writer has | |
3646 | * finished the transaction, and started it on its way to the disk. | |
3647 | * Then, we flush the commit or journal list, and just return 0 | |
3648 | * because the rest of journal end was already done for this | |
3649 | * transaction. | |
bd4c625c | 3650 | */ |
a228bf8f | 3651 | if (atomic_read(&journal->j_wcount) > 0) { |
bd4c625c LT |
3652 | if (flush || commit_now) { |
3653 | unsigned trans_id; | |
3654 | ||
3655 | jl = journal->j_current_jl; | |
3656 | trans_id = jl->j_trans_id; | |
3657 | if (wait_on_commit) | |
3658 | jl->j_state |= LIST_COMMIT_PENDING; | |
a228bf8f | 3659 | atomic_set(&journal->j_jlock, 1); |
bd4c625c LT |
3660 | if (flush) { |
3661 | journal->j_next_full_flush = 1; | |
3662 | } | |
a9dd3643 | 3663 | unlock_journal(sb); |
bd4c625c | 3664 | |
098297b2 JM |
3665 | /* |
3666 | * sleep while the current transaction is | |
3667 | * still j_jlocked | |
3668 | */ | |
bd4c625c LT |
3669 | while (journal->j_trans_id == trans_id) { |
3670 | if (atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3671 | queue_log_writer(sb); |
bd4c625c | 3672 | } else { |
a9dd3643 | 3673 | lock_journal(sb); |
bd4c625c | 3674 | if (journal->j_trans_id == trans_id) { |
a228bf8f | 3675 | atomic_set(&journal->j_jlock, |
bd4c625c LT |
3676 | 1); |
3677 | } | |
a9dd3643 | 3678 | unlock_journal(sb); |
bd4c625c LT |
3679 | } |
3680 | } | |
14a61442 | 3681 | BUG_ON(journal->j_trans_id == trans_id); |
098297b2 | 3682 | |
bd4c625c | 3683 | if (commit_now |
a9dd3643 | 3684 | && journal_list_still_alive(sb, trans_id) |
bd4c625c | 3685 | && wait_on_commit) { |
a9dd3643 | 3686 | flush_commit_list(sb, jl, 1); |
bd4c625c LT |
3687 | } |
3688 | return 0; | |
3689 | } | |
a9dd3643 | 3690 | unlock_journal(sb); |
bd4c625c LT |
3691 | return 0; |
3692 | } | |
3693 | ||
3694 | /* deal with old transactions where we are the last writers */ | |
3695 | now = get_seconds(); | |
3696 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
3697 | commit_now = 1; | |
3698 | journal->j_next_async_flush = 1; | |
3699 | } | |
3700 | /* don't batch when someone is waiting on j_join_wait */ | |
3701 | /* don't batch when syncing the commit or flushing the whole trans */ | |
a228bf8f | 3702 | if (!(journal->j_must_wait > 0) && !(atomic_read(&journal->j_jlock)) |
bd4c625c LT |
3703 | && !flush && !commit_now && (journal->j_len < journal->j_max_batch) |
3704 | && journal->j_len_alloc < journal->j_max_batch | |
3705 | && journal->j_cnode_free > (journal->j_trans_max * 3)) { | |
3706 | journal->j_bcount++; | |
a9dd3643 | 3707 | unlock_journal(sb); |
bd4c625c LT |
3708 | return 0; |
3709 | } | |
3710 | ||
a9dd3643 JM |
3711 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { |
3712 | reiserfs_panic(sb, "journal-003", | |
c3a9c210 | 3713 | "j_start (%ld) is too high", |
bd4c625c LT |
3714 | journal->j_start); |
3715 | } | |
3716 | return 1; | |
1da177e4 LT |
3717 | } |
3718 | ||
3719 | /* | |
098297b2 JM |
3720 | * Does all the work that makes deleting blocks safe. |
3721 | * when deleting a block mark BH_JNew, just remove it from the current | |
3722 | * transaction, clean it's buffer_head and move on. | |
3723 | * | |
3724 | * otherwise: | |
3725 | * set a bit for the block in the journal bitmap. That will prevent it from | |
3726 | * being allocated for unformatted nodes before this transaction has finished. | |
3727 | * | |
3728 | * mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. | |
3729 | * That will prevent any old transactions with this block from trying to flush | |
3730 | * to the real location. Since we aren't removing the cnode from the | |
3731 | * journal_list_hash, *the block can't be reallocated yet. | |
3732 | * | |
3733 | * Then remove it from the current transaction, decrementing any counters and | |
3734 | * filing it on the clean list. | |
3735 | */ | |
bd4c625c | 3736 | int journal_mark_freed(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3737 | struct super_block *sb, b_blocknr_t blocknr) |
bd4c625c | 3738 | { |
a9dd3643 | 3739 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3740 | struct reiserfs_journal_cnode *cn = NULL; |
3741 | struct buffer_head *bh = NULL; | |
3742 | struct reiserfs_list_bitmap *jb = NULL; | |
3743 | int cleaned = 0; | |
3744 | BUG_ON(!th->t_trans_id); | |
3745 | ||
a9dd3643 | 3746 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3747 | if (cn && cn->bh) { |
3748 | bh = cn->bh; | |
3749 | get_bh(bh); | |
3750 | } | |
3751 | /* if it is journal new, we just remove it from this transaction */ | |
3752 | if (bh && buffer_journal_new(bh)) { | |
3753 | clear_buffer_journal_new(bh); | |
3754 | clear_prepared_bits(bh); | |
3755 | reiserfs_clean_and_file_buffer(bh); | |
a9dd3643 | 3756 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c | 3757 | } else { |
098297b2 JM |
3758 | /* |
3759 | * set the bit for this block in the journal bitmap | |
3760 | * for this transaction | |
3761 | */ | |
bd4c625c LT |
3762 | jb = journal->j_current_jl->j_list_bitmap; |
3763 | if (!jb) { | |
a9dd3643 | 3764 | reiserfs_panic(sb, "journal-1702", |
c3a9c210 | 3765 | "journal_list_bitmap is NULL"); |
bd4c625c | 3766 | } |
a9dd3643 | 3767 | set_bit_in_list_bitmap(sb, blocknr, jb); |
bd4c625c LT |
3768 | |
3769 | /* Note, the entire while loop is not allowed to schedule. */ | |
3770 | ||
3771 | if (bh) { | |
3772 | clear_prepared_bits(bh); | |
3773 | reiserfs_clean_and_file_buffer(bh); | |
3774 | } | |
a9dd3643 | 3775 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c | 3776 | |
098297b2 JM |
3777 | /* |
3778 | * find all older transactions with this block, | |
3779 | * make sure they don't try to write it out | |
3780 | */ | |
a9dd3643 | 3781 | cn = get_journal_hash_dev(sb, journal->j_list_hash_table, |
bd4c625c LT |
3782 | blocknr); |
3783 | while (cn) { | |
a9dd3643 | 3784 | if (sb == cn->sb && blocknr == cn->blocknr) { |
bd4c625c LT |
3785 | set_bit(BLOCK_FREED, &cn->state); |
3786 | if (cn->bh) { | |
098297b2 JM |
3787 | /* |
3788 | * remove_from_transaction will brelse | |
3789 | * the buffer if it was in the current | |
3790 | * trans | |
3791 | */ | |
bd4c625c | 3792 | if (!cleaned) { |
bd4c625c LT |
3793 | clear_buffer_journal_dirty(cn-> |
3794 | bh); | |
3795 | clear_buffer_dirty(cn->bh); | |
3796 | clear_buffer_journal_test(cn-> | |
3797 | bh); | |
3798 | cleaned = 1; | |
3799 | put_bh(cn->bh); | |
3800 | if (atomic_read | |
a228bf8f | 3801 | (&cn->bh->b_count) < 0) { |
a9dd3643 | 3802 | reiserfs_warning(sb, |
45b03d5e JM |
3803 | "journal-2138", |
3804 | "cn->bh->b_count < 0"); | |
bd4c625c LT |
3805 | } |
3806 | } | |
098297b2 JM |
3807 | /* |
3808 | * since we are clearing the bh, | |
3809 | * we MUST dec nonzerolen | |
3810 | */ | |
3811 | if (cn->jlist) { | |
a228bf8f JM |
3812 | atomic_dec(&cn->jlist-> |
3813 | j_nonzerolen); | |
bd4c625c LT |
3814 | } |
3815 | cn->bh = NULL; | |
3816 | } | |
3817 | } | |
3818 | cn = cn->hnext; | |
3819 | } | |
3820 | } | |
3821 | ||
398c95bd CM |
3822 | if (bh) |
3823 | release_buffer_page(bh); /* get_hash grabs the buffer */ | |
bd4c625c LT |
3824 | return 0; |
3825 | } | |
3826 | ||
3827 | void reiserfs_update_inode_transaction(struct inode *inode) | |
3828 | { | |
3829 | struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); | |
3830 | REISERFS_I(inode)->i_jl = journal->j_current_jl; | |
3831 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id; | |
1da177e4 LT |
3832 | } |
3833 | ||
3834 | /* | |
3835 | * returns -1 on error, 0 if no commits/barriers were done and 1 | |
3836 | * if a transaction was actually committed and the barrier was done | |
3837 | */ | |
3838 | static int __commit_trans_jl(struct inode *inode, unsigned long id, | |
bd4c625c | 3839 | struct reiserfs_journal_list *jl) |
1da177e4 | 3840 | { |
bd4c625c LT |
3841 | struct reiserfs_transaction_handle th; |
3842 | struct super_block *sb = inode->i_sb; | |
3843 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
3844 | int ret = 0; | |
3845 | ||
098297b2 JM |
3846 | /* |
3847 | * is it from the current transaction, | |
3848 | * or from an unknown transaction? | |
3849 | */ | |
bd4c625c LT |
3850 | if (id == journal->j_trans_id) { |
3851 | jl = journal->j_current_jl; | |
098297b2 JM |
3852 | /* |
3853 | * try to let other writers come in and | |
3854 | * grow this transaction | |
3855 | */ | |
bd4c625c LT |
3856 | let_transaction_grow(sb, id); |
3857 | if (journal->j_trans_id != id) { | |
3858 | goto flush_commit_only; | |
3859 | } | |
1da177e4 | 3860 | |
bd4c625c LT |
3861 | ret = journal_begin(&th, sb, 1); |
3862 | if (ret) | |
3863 | return ret; | |
3864 | ||
3865 | /* someone might have ended this transaction while we joined */ | |
3866 | if (journal->j_trans_id != id) { | |
3867 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), | |
3868 | 1); | |
09f1b80b | 3869 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb)); |
58d85426 | 3870 | ret = journal_end(&th); |
bd4c625c LT |
3871 | goto flush_commit_only; |
3872 | } | |
1da177e4 | 3873 | |
58d85426 | 3874 | ret = journal_end_sync(&th); |
bd4c625c LT |
3875 | if (!ret) |
3876 | ret = 1; | |
1da177e4 | 3877 | |
bd4c625c | 3878 | } else { |
098297b2 JM |
3879 | /* |
3880 | * this gets tricky, we have to make sure the journal list in | |
bd4c625c LT |
3881 | * the inode still exists. We know the list is still around |
3882 | * if we've got a larger transaction id than the oldest list | |
3883 | */ | |
cf776a7a | 3884 | flush_commit_only: |
bd4c625c LT |
3885 | if (journal_list_still_alive(inode->i_sb, id)) { |
3886 | /* | |
3887 | * we only set ret to 1 when we know for sure | |
3888 | * the barrier hasn't been started yet on the commit | |
3889 | * block. | |
3890 | */ | |
3891 | if (atomic_read(&jl->j_commit_left) > 1) | |
3892 | ret = 1; | |
3893 | flush_commit_list(sb, jl, 1); | |
3894 | if (journal->j_errno) | |
3895 | ret = journal->j_errno; | |
3896 | } | |
1da177e4 | 3897 | } |
bd4c625c LT |
3898 | /* otherwise the list is gone, and long since committed */ |
3899 | return ret; | |
3900 | } | |
1da177e4 | 3901 | |
bd4c625c LT |
3902 | int reiserfs_commit_for_inode(struct inode *inode) |
3903 | { | |
600ed416 | 3904 | unsigned int id = REISERFS_I(inode)->i_trans_id; |
bd4c625c | 3905 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; |
1da177e4 | 3906 | |
098297b2 JM |
3907 | /* |
3908 | * for the whole inode, assume unset id means it was | |
bd4c625c | 3909 | * changed in the current transaction. More conservative |
1da177e4 | 3910 | */ |
bd4c625c LT |
3911 | if (!id || !jl) { |
3912 | reiserfs_update_inode_transaction(inode); | |
3913 | id = REISERFS_I(inode)->i_trans_id; | |
3914 | /* jl will be updated in __commit_trans_jl */ | |
3915 | } | |
3916 | ||
3917 | return __commit_trans_jl(inode, id, jl); | |
3918 | } | |
3919 | ||
a9dd3643 | 3920 | void reiserfs_restore_prepared_buffer(struct super_block *sb, |
bd4c625c LT |
3921 | struct buffer_head *bh) |
3922 | { | |
a9dd3643 JM |
3923 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
3924 | PROC_INFO_INC(sb, journal.restore_prepared); | |
bd4c625c LT |
3925 | if (!bh) { |
3926 | return; | |
3927 | } | |
3928 | if (test_clear_buffer_journal_restore_dirty(bh) && | |
3929 | buffer_journal_dirty(bh)) { | |
3930 | struct reiserfs_journal_cnode *cn; | |
278f6679 | 3931 | reiserfs_write_lock(sb); |
a9dd3643 | 3932 | cn = get_journal_hash_dev(sb, |
bd4c625c LT |
3933 | journal->j_list_hash_table, |
3934 | bh->b_blocknr); | |
3935 | if (cn && can_dirty(cn)) { | |
3936 | set_buffer_journal_test(bh); | |
3937 | mark_buffer_dirty(bh); | |
3938 | } | |
278f6679 | 3939 | reiserfs_write_unlock(sb); |
bd4c625c LT |
3940 | } |
3941 | clear_buffer_journal_prepared(bh); | |
3942 | } | |
3943 | ||
3944 | extern struct tree_balance *cur_tb; | |
1da177e4 | 3945 | /* |
098297b2 JM |
3946 | * before we can change a metadata block, we have to make sure it won't |
3947 | * be written to disk while we are altering it. So, we must: | |
3948 | * clean it | |
3949 | * wait on it. | |
3950 | */ | |
a9dd3643 | 3951 | int reiserfs_prepare_for_journal(struct super_block *sb, |
bd4c625c LT |
3952 | struct buffer_head *bh, int wait) |
3953 | { | |
a9dd3643 | 3954 | PROC_INFO_INC(sb, journal.prepare); |
bd4c625c | 3955 | |
ca5de404 | 3956 | if (!trylock_buffer(bh)) { |
bd4c625c LT |
3957 | if (!wait) |
3958 | return 0; | |
3959 | lock_buffer(bh); | |
3960 | } | |
3961 | set_buffer_journal_prepared(bh); | |
3962 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { | |
3963 | clear_buffer_journal_test(bh); | |
3964 | set_buffer_journal_restore_dirty(bh); | |
3965 | } | |
3966 | unlock_buffer(bh); | |
3967 | return 1; | |
3968 | } | |
3969 | ||
0222e657 | 3970 | /* |
098297b2 JM |
3971 | * long and ugly. If flush, will not return until all commit |
3972 | * blocks and all real buffers in the trans are on disk. | |
3973 | * If no_async, won't return until all commit blocks are on disk. | |
3974 | * | |
3975 | * keep reading, there are comments as you go along | |
3976 | * | |
3977 | * If the journal is aborted, we just clean up. Things like flushing | |
3978 | * journal lists, etc just won't happen. | |
3979 | */ | |
58d85426 | 3980 | static int do_journal_end(struct reiserfs_transaction_handle *th, int flags) |
bd4c625c | 3981 | { |
58d85426 | 3982 | struct super_block *sb = th->t_super; |
a9dd3643 | 3983 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3984 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; |
3985 | struct reiserfs_journal_cnode *last_cn = NULL; | |
3986 | struct reiserfs_journal_desc *desc; | |
3987 | struct reiserfs_journal_commit *commit; | |
3988 | struct buffer_head *c_bh; /* commit bh */ | |
3989 | struct buffer_head *d_bh; /* desc bh */ | |
3990 | int cur_write_start = 0; /* start index of current log write */ | |
3991 | int old_start; | |
3992 | int i; | |
a44c94a7 AZ |
3993 | int flush; |
3994 | int wait_on_commit; | |
bd4c625c LT |
3995 | struct reiserfs_journal_list *jl, *temp_jl; |
3996 | struct list_head *entry, *safe; | |
3997 | unsigned long jindex; | |
600ed416 | 3998 | unsigned int commit_trans_id; |
bd4c625c | 3999 | int trans_half; |
278f6679 | 4000 | int depth; |
bd4c625c LT |
4001 | |
4002 | BUG_ON(th->t_refcount > 1); | |
4003 | BUG_ON(!th->t_trans_id); | |
58d85426 | 4004 | BUG_ON(!th->t_super); |
bd4c625c | 4005 | |
098297b2 JM |
4006 | /* |
4007 | * protect flush_older_commits from doing mistakes if the | |
4008 | * transaction ID counter gets overflowed. | |
4009 | */ | |
600ed416 | 4010 | if (th->t_trans_id == ~0U) |
a44c94a7 AZ |
4011 | flags |= FLUSH_ALL | COMMIT_NOW | WAIT; |
4012 | flush = flags & FLUSH_ALL; | |
4013 | wait_on_commit = flags & WAIT; | |
4014 | ||
bd4c625c | 4015 | current->journal_info = th->t_handle_save; |
a9dd3643 | 4016 | reiserfs_check_lock_depth(sb, "journal end"); |
bd4c625c | 4017 | if (journal->j_len == 0) { |
a9dd3643 | 4018 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 4019 | 1); |
09f1b80b | 4020 | journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 4021 | } |
1da177e4 | 4022 | |
a9dd3643 | 4023 | lock_journal(sb); |
bd4c625c LT |
4024 | if (journal->j_next_full_flush) { |
4025 | flags |= FLUSH_ALL; | |
4026 | flush = 1; | |
4027 | } | |
4028 | if (journal->j_next_async_flush) { | |
4029 | flags |= COMMIT_NOW | WAIT; | |
4030 | wait_on_commit = 1; | |
4031 | } | |
4032 | ||
098297b2 JM |
4033 | /* |
4034 | * check_journal_end locks the journal, and unlocks if it does | |
4035 | * not return 1 it tells us if we should continue with the | |
4036 | * journal_end, or just return | |
bd4c625c | 4037 | */ |
58d85426 | 4038 | if (!check_journal_end(th, flags)) { |
033369d1 | 4039 | reiserfs_schedule_old_flush(sb); |
a9dd3643 JM |
4040 | wake_queued_writers(sb); |
4041 | reiserfs_async_progress_wait(sb); | |
bd4c625c LT |
4042 | goto out; |
4043 | } | |
4044 | ||
4045 | /* check_journal_end might set these, check again */ | |
4046 | if (journal->j_next_full_flush) { | |
4047 | flush = 1; | |
4048 | } | |
4049 | ||
4050 | /* | |
098297b2 JM |
4051 | * j must wait means we have to flush the log blocks, and the |
4052 | * real blocks for this transaction | |
bd4c625c LT |
4053 | */ |
4054 | if (journal->j_must_wait > 0) { | |
4055 | flush = 1; | |
4056 | } | |
1da177e4 | 4057 | #ifdef REISERFS_PREALLOCATE |
098297b2 JM |
4058 | /* |
4059 | * quota ops might need to nest, setup the journal_info pointer | |
4060 | * for them and raise the refcount so that it is > 0. | |
4061 | */ | |
bd4c625c | 4062 | current->journal_info = th; |
ef43bc4f | 4063 | th->t_refcount++; |
098297b2 JM |
4064 | |
4065 | /* it should not involve new blocks into the transaction */ | |
4066 | reiserfs_discard_all_prealloc(th); | |
4067 | ||
ef43bc4f | 4068 | th->t_refcount--; |
bd4c625c | 4069 | current->journal_info = th->t_handle_save; |
1da177e4 | 4070 | #endif |
bd4c625c LT |
4071 | |
4072 | /* setup description block */ | |
4073 | d_bh = | |
a9dd3643 JM |
4074 | journal_getblk(sb, |
4075 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4076 | journal->j_start); |
4077 | set_buffer_uptodate(d_bh); | |
4078 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; | |
4079 | memset(d_bh->b_data, 0, d_bh->b_size); | |
4080 | memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); | |
4081 | set_desc_trans_id(desc, journal->j_trans_id); | |
4082 | ||
098297b2 JM |
4083 | /* |
4084 | * setup commit block. Don't write (keep it clean too) this one | |
4085 | * until after everyone else is written | |
4086 | */ | |
a9dd3643 | 4087 | c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 4088 | ((journal->j_start + journal->j_len + |
a9dd3643 | 4089 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4090 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
4091 | memset(c_bh->b_data, 0, c_bh->b_size); | |
4092 | set_commit_trans_id(commit, journal->j_trans_id); | |
4093 | set_buffer_uptodate(c_bh); | |
4094 | ||
4095 | /* init this journal list */ | |
4096 | jl = journal->j_current_jl; | |
4097 | ||
098297b2 JM |
4098 | /* |
4099 | * we lock the commit before doing anything because | |
bd4c625c LT |
4100 | * we want to make sure nobody tries to run flush_commit_list until |
4101 | * the new transaction is fully setup, and we've already flushed the | |
4102 | * ordered bh list | |
4103 | */ | |
8ebc4232 | 4104 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); |
bd4c625c LT |
4105 | |
4106 | /* save the transaction id in case we need to commit it later */ | |
4107 | commit_trans_id = jl->j_trans_id; | |
4108 | ||
4109 | atomic_set(&jl->j_older_commits_done, 0); | |
4110 | jl->j_trans_id = journal->j_trans_id; | |
4111 | jl->j_timestamp = journal->j_trans_start_time; | |
4112 | jl->j_commit_bh = c_bh; | |
4113 | jl->j_start = journal->j_start; | |
4114 | jl->j_len = journal->j_len; | |
4115 | atomic_set(&jl->j_nonzerolen, journal->j_len); | |
4116 | atomic_set(&jl->j_commit_left, journal->j_len + 2); | |
4117 | jl->j_realblock = NULL; | |
4118 | ||
098297b2 JM |
4119 | /* |
4120 | * The ENTIRE FOR LOOP MUST not cause schedule to occur. | |
4121 | * for each real block, add it to the journal list hash, | |
4122 | * copy into real block index array in the commit or desc block | |
bd4c625c | 4123 | */ |
a9dd3643 | 4124 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
4125 | for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { |
4126 | if (buffer_journaled(cn->bh)) { | |
a9dd3643 | 4127 | jl_cn = get_cnode(sb); |
bd4c625c | 4128 | if (!jl_cn) { |
a9dd3643 | 4129 | reiserfs_panic(sb, "journal-1676", |
c3a9c210 | 4130 | "get_cnode returned NULL"); |
bd4c625c LT |
4131 | } |
4132 | if (i == 0) { | |
4133 | jl->j_realblock = jl_cn; | |
4134 | } | |
4135 | jl_cn->prev = last_cn; | |
4136 | jl_cn->next = NULL; | |
4137 | if (last_cn) { | |
4138 | last_cn->next = jl_cn; | |
4139 | } | |
4140 | last_cn = jl_cn; | |
098297b2 JM |
4141 | /* |
4142 | * make sure the block we are trying to log | |
4143 | * is not a block of journal or reserved area | |
4144 | */ | |
bd4c625c | 4145 | if (is_block_in_log_or_reserved_area |
a9dd3643 JM |
4146 | (sb, cn->bh->b_blocknr)) { |
4147 | reiserfs_panic(sb, "journal-2332", | |
c3a9c210 JM |
4148 | "Trying to log block %lu, " |
4149 | "which is a log block", | |
bd4c625c LT |
4150 | cn->bh->b_blocknr); |
4151 | } | |
4152 | jl_cn->blocknr = cn->bh->b_blocknr; | |
4153 | jl_cn->state = 0; | |
a9dd3643 | 4154 | jl_cn->sb = sb; |
bd4c625c LT |
4155 | jl_cn->bh = cn->bh; |
4156 | jl_cn->jlist = jl; | |
4157 | insert_journal_hash(journal->j_list_hash_table, jl_cn); | |
4158 | if (i < trans_half) { | |
4159 | desc->j_realblock[i] = | |
4160 | cpu_to_le32(cn->bh->b_blocknr); | |
4161 | } else { | |
4162 | commit->j_realblock[i - trans_half] = | |
4163 | cpu_to_le32(cn->bh->b_blocknr); | |
4164 | } | |
4165 | } else { | |
4166 | i--; | |
4167 | } | |
4168 | } | |
4169 | set_desc_trans_len(desc, journal->j_len); | |
4170 | set_desc_mount_id(desc, journal->j_mount_id); | |
4171 | set_desc_trans_id(desc, journal->j_trans_id); | |
4172 | set_commit_trans_len(commit, journal->j_len); | |
4173 | ||
098297b2 JM |
4174 | /* |
4175 | * special check in case all buffers in the journal | |
4176 | * were marked for not logging | |
4177 | */ | |
14a61442 | 4178 | BUG_ON(journal->j_len == 0); |
bd4c625c | 4179 | |
098297b2 JM |
4180 | /* |
4181 | * we're about to dirty all the log blocks, mark the description block | |
bd4c625c LT |
4182 | * dirty now too. Don't mark the commit block dirty until all the |
4183 | * others are on disk | |
4184 | */ | |
4185 | mark_buffer_dirty(d_bh); | |
4186 | ||
098297b2 JM |
4187 | /* |
4188 | * first data block is j_start + 1, so add one to | |
4189 | * cur_write_start wherever you use it | |
4190 | */ | |
bd4c625c LT |
4191 | cur_write_start = journal->j_start; |
4192 | cn = journal->j_first; | |
098297b2 | 4193 | jindex = 1; /* start at one so we don't get the desc again */ |
bd4c625c LT |
4194 | while (cn) { |
4195 | clear_buffer_journal_new(cn->bh); | |
4196 | /* copy all the real blocks into log area. dirty log blocks */ | |
4197 | if (buffer_journaled(cn->bh)) { | |
4198 | struct buffer_head *tmp_bh; | |
4199 | char *addr; | |
4200 | struct page *page; | |
4201 | tmp_bh = | |
a9dd3643 JM |
4202 | journal_getblk(sb, |
4203 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4204 | ((cur_write_start + |
4205 | jindex) % | |
a9dd3643 | 4206 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4207 | set_buffer_uptodate(tmp_bh); |
4208 | page = cn->bh->b_page; | |
4209 | addr = kmap(page); | |
4210 | memcpy(tmp_bh->b_data, | |
4211 | addr + offset_in_page(cn->bh->b_data), | |
4212 | cn->bh->b_size); | |
4213 | kunmap(page); | |
4214 | mark_buffer_dirty(tmp_bh); | |
4215 | jindex++; | |
4216 | set_buffer_journal_dirty(cn->bh); | |
4217 | clear_buffer_journaled(cn->bh); | |
4218 | } else { | |
098297b2 JM |
4219 | /* |
4220 | * JDirty cleared sometime during transaction. | |
4221 | * don't log this one | |
4222 | */ | |
a9dd3643 | 4223 | reiserfs_warning(sb, "journal-2048", |
45b03d5e JM |
4224 | "BAD, buffer in journal hash, " |
4225 | "but not JDirty!"); | |
bd4c625c LT |
4226 | brelse(cn->bh); |
4227 | } | |
4228 | next = cn->next; | |
a9dd3643 | 4229 | free_cnode(sb, cn); |
bd4c625c | 4230 | cn = next; |
278f6679 | 4231 | reiserfs_cond_resched(sb); |
bd4c625c LT |
4232 | } |
4233 | ||
098297b2 JM |
4234 | /* |
4235 | * we are done with both the c_bh and d_bh, but | |
4236 | * c_bh must be written after all other commit blocks, | |
4237 | * so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. | |
bd4c625c LT |
4238 | */ |
4239 | ||
a9dd3643 | 4240 | journal->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
4241 | |
4242 | /* now it is safe to insert this transaction on the main list */ | |
4243 | list_add_tail(&jl->j_list, &journal->j_journal_list); | |
4244 | list_add_tail(&jl->j_working_list, &journal->j_working_list); | |
4245 | journal->j_num_work_lists++; | |
4246 | ||
4247 | /* reset journal values for the next transaction */ | |
4248 | old_start = journal->j_start; | |
4249 | journal->j_start = | |
4250 | (journal->j_start + journal->j_len + | |
a9dd3643 | 4251 | 2) % SB_ONDISK_JOURNAL_SIZE(sb); |
a228bf8f | 4252 | atomic_set(&journal->j_wcount, 0); |
bd4c625c LT |
4253 | journal->j_bcount = 0; |
4254 | journal->j_last = NULL; | |
4255 | journal->j_first = NULL; | |
4256 | journal->j_len = 0; | |
4257 | journal->j_trans_start_time = 0; | |
a44c94a7 AZ |
4258 | /* check for trans_id overflow */ |
4259 | if (++journal->j_trans_id == 0) | |
4260 | journal->j_trans_id = 10; | |
bd4c625c LT |
4261 | journal->j_current_jl->j_trans_id = journal->j_trans_id; |
4262 | journal->j_must_wait = 0; | |
4263 | journal->j_len_alloc = 0; | |
4264 | journal->j_next_full_flush = 0; | |
4265 | journal->j_next_async_flush = 0; | |
a9dd3643 | 4266 | init_journal_hash(sb); |
bd4c625c | 4267 | |
098297b2 JM |
4268 | /* |
4269 | * make sure reiserfs_add_jh sees the new current_jl before we | |
4270 | * write out the tails | |
4271 | */ | |
bd4c625c LT |
4272 | smp_mb(); |
4273 | ||
098297b2 JM |
4274 | /* |
4275 | * tail conversion targets have to hit the disk before we end the | |
bd4c625c | 4276 | * transaction. Otherwise a later transaction might repack the tail |
098297b2 JM |
4277 | * before this transaction commits, leaving the data block unflushed |
4278 | * and clean, if we crash before the later transaction commits, the | |
4279 | * data block is lost. | |
bd4c625c LT |
4280 | */ |
4281 | if (!list_empty(&jl->j_tail_bh_list)) { | |
278f6679 | 4282 | depth = reiserfs_write_unlock_nested(sb); |
bd4c625c LT |
4283 | write_ordered_buffers(&journal->j_dirty_buffers_lock, |
4284 | journal, jl, &jl->j_tail_bh_list); | |
278f6679 | 4285 | reiserfs_write_lock_nested(sb, depth); |
bd4c625c | 4286 | } |
14a61442 | 4287 | BUG_ON(!list_empty(&jl->j_tail_bh_list)); |
90415dea | 4288 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c | 4289 | |
098297b2 JM |
4290 | /* |
4291 | * honor the flush wishes from the caller, simple commits can | |
4292 | * be done outside the journal lock, they are done below | |
4293 | * | |
4294 | * if we don't flush the commit list right now, we put it into | |
4295 | * the work queue so the people waiting on the async progress work | |
4296 | * queue don't wait for this proc to flush journal lists and such. | |
bd4c625c LT |
4297 | */ |
4298 | if (flush) { | |
a9dd3643 JM |
4299 | flush_commit_list(sb, jl, 1); |
4300 | flush_journal_list(sb, jl, 1); | |
01777836 JK |
4301 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) { |
4302 | /* | |
4303 | * Avoid queueing work when sb is being shut down. Transaction | |
4304 | * will be flushed on journal shutdown. | |
4305 | */ | |
4306 | if (sb->s_flags & MS_ACTIVE) | |
4307 | queue_delayed_work(REISERFS_SB(sb)->commit_wq, | |
4308 | &journal->j_work, HZ / 10); | |
4309 | } | |
bd4c625c | 4310 | |
098297b2 JM |
4311 | /* |
4312 | * if the next transaction has any chance of wrapping, flush | |
4313 | * transactions that might get overwritten. If any journal lists | |
4314 | * are very old flush them as well. | |
bd4c625c | 4315 | */ |
cf776a7a | 4316 | first_jl: |
bd4c625c LT |
4317 | list_for_each_safe(entry, safe, &journal->j_journal_list) { |
4318 | temp_jl = JOURNAL_LIST_ENTRY(entry); | |
4319 | if (journal->j_start <= temp_jl->j_start) { | |
4320 | if ((journal->j_start + journal->j_trans_max + 1) >= | |
4321 | temp_jl->j_start) { | |
a9dd3643 | 4322 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4323 | goto first_jl; |
4324 | } else if ((journal->j_start + | |
4325 | journal->j_trans_max + 1) < | |
a9dd3643 | 4326 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
098297b2 JM |
4327 | /* |
4328 | * if we don't cross into the next | |
4329 | * transaction and we don't wrap, there is | |
4330 | * no way we can overlap any later transactions | |
bd4c625c LT |
4331 | * break now |
4332 | */ | |
4333 | break; | |
4334 | } | |
4335 | } else if ((journal->j_start + | |
4336 | journal->j_trans_max + 1) > | |
a9dd3643 | 4337 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c | 4338 | if (((journal->j_start + journal->j_trans_max + 1) % |
a9dd3643 | 4339 | SB_ONDISK_JOURNAL_SIZE(sb)) >= |
bd4c625c | 4340 | temp_jl->j_start) { |
a9dd3643 | 4341 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4342 | goto first_jl; |
4343 | } else { | |
098297b2 JM |
4344 | /* |
4345 | * we don't overlap anything from out start | |
4346 | * to the end of the log, and our wrapped | |
4347 | * portion doesn't overlap anything at | |
4348 | * the start of the log. We can break | |
4349 | */ | |
bd4c625c LT |
4350 | break; |
4351 | } | |
4352 | } | |
4353 | } | |
bd4c625c LT |
4354 | |
4355 | journal->j_current_jl->j_list_bitmap = | |
a9dd3643 | 4356 | get_list_bitmap(sb, journal->j_current_jl); |
bd4c625c LT |
4357 | |
4358 | if (!(journal->j_current_jl->j_list_bitmap)) { | |
a9dd3643 | 4359 | reiserfs_panic(sb, "journal-1996", |
c3a9c210 | 4360 | "could not get a list bitmap"); |
bd4c625c LT |
4361 | } |
4362 | ||
a228bf8f | 4363 | atomic_set(&journal->j_jlock, 0); |
a9dd3643 | 4364 | unlock_journal(sb); |
bd4c625c LT |
4365 | /* wake up any body waiting to join. */ |
4366 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); | |
a228bf8f | 4367 | wake_up(&journal->j_join_wait); |
bd4c625c LT |
4368 | |
4369 | if (!flush && wait_on_commit && | |
a9dd3643 JM |
4370 | journal_list_still_alive(sb, commit_trans_id)) { |
4371 | flush_commit_list(sb, jl, 1); | |
bd4c625c | 4372 | } |
cf776a7a | 4373 | out: |
a9dd3643 | 4374 | reiserfs_check_lock_depth(sb, "journal end2"); |
bd4c625c LT |
4375 | |
4376 | memset(th, 0, sizeof(*th)); | |
098297b2 JM |
4377 | /* |
4378 | * Re-set th->t_super, so we can properly keep track of how many | |
bd4c625c | 4379 | * persistent transactions there are. We need to do this so if this |
098297b2 JM |
4380 | * call is part of a failed restart_transaction, we can free it later |
4381 | */ | |
a9dd3643 | 4382 | th->t_super = sb; |
bd4c625c LT |
4383 | |
4384 | return journal->j_errno; | |
4385 | } | |
4386 | ||
32e8b106 JM |
4387 | /* Send the file system read only and refuse new transactions */ |
4388 | void reiserfs_abort_journal(struct super_block *sb, int errno) | |
bd4c625c LT |
4389 | { |
4390 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
4391 | if (test_bit(J_ABORTED, &journal->j_state)) | |
4392 | return; | |
4393 | ||
32e8b106 JM |
4394 | if (!journal->j_errno) |
4395 | journal->j_errno = errno; | |
bd4c625c LT |
4396 | |
4397 | sb->s_flags |= MS_RDONLY; | |
4398 | set_bit(J_ABORTED, &journal->j_state); | |
1da177e4 LT |
4399 | |
4400 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 4401 | dump_stack(); |
1da177e4 LT |
4402 | #endif |
4403 | } |