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1da177e4 LT |
1 | /* |
2 | ** Write ahead logging implementation copyright Chris Mason 2000 | |
3 | ** | |
4 | ** The background commits make this code very interelated, 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 | */ | |
36 | ||
37 | #include <linux/config.h> | |
38 | #include <asm/uaccess.h> | |
39 | #include <asm/system.h> | |
40 | ||
41 | #include <linux/time.h> | |
42 | #include <asm/semaphore.h> | |
43 | ||
44 | #include <linux/vmalloc.h> | |
45 | #include <linux/reiserfs_fs.h> | |
46 | ||
47 | #include <linux/kernel.h> | |
48 | #include <linux/errno.h> | |
49 | #include <linux/fcntl.h> | |
50 | #include <linux/stat.h> | |
51 | #include <linux/string.h> | |
52 | #include <linux/smp_lock.h> | |
53 | #include <linux/buffer_head.h> | |
54 | #include <linux/workqueue.h> | |
55 | #include <linux/writeback.h> | |
56 | #include <linux/blkdev.h> | |
57 | ||
58 | ||
59 | /* gets a struct reiserfs_journal_list * from a list head */ | |
60 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
61 | j_list)) | |
62 | #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
63 | j_working_list)) | |
64 | ||
65 | /* the number of mounted filesystems. This is used to decide when to | |
66 | ** start and kill the commit workqueue | |
67 | */ | |
68 | static int reiserfs_mounted_fs_count; | |
69 | ||
70 | static struct workqueue_struct *commit_wq; | |
71 | ||
72 | #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit | |
73 | structs at 4k */ | |
74 | #define BUFNR 64 /*read ahead */ | |
75 | ||
76 | /* cnode stat bits. Move these into reiserfs_fs.h */ | |
77 | ||
78 | #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ | |
79 | #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ | |
80 | ||
81 | #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ | |
82 | #define BLOCK_DIRTIED 5 | |
83 | ||
84 | ||
85 | /* journal list state bits */ | |
86 | #define LIST_TOUCHED 1 | |
87 | #define LIST_DIRTY 2 | |
88 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ | |
89 | ||
90 | /* flags for do_journal_end */ | |
91 | #define FLUSH_ALL 1 /* flush commit and real blocks */ | |
92 | #define COMMIT_NOW 2 /* end and commit this transaction */ | |
93 | #define WAIT 4 /* wait for the log blocks to hit the disk*/ | |
94 | ||
95 | static int do_journal_end(struct reiserfs_transaction_handle *,struct super_block *,unsigned long nblocks,int flags) ; | |
96 | static int flush_journal_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) ; | |
97 | static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) ; | |
98 | static int can_dirty(struct reiserfs_journal_cnode *cn) ; | |
99 | static int journal_join(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks); | |
100 | static int release_journal_dev( struct super_block *super, | |
101 | struct reiserfs_journal *journal ); | |
102 | static int dirty_one_transaction(struct super_block *s, | |
103 | struct reiserfs_journal_list *jl); | |
104 | static void flush_async_commits(void *p); | |
105 | static void queue_log_writer(struct super_block *s); | |
106 | ||
107 | /* values for join in do_journal_begin_r */ | |
108 | enum { | |
109 | JBEGIN_REG = 0, /* regular journal begin */ | |
110 | JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ | |
111 | JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ | |
112 | }; | |
113 | ||
114 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, | |
115 | struct super_block * p_s_sb, | |
116 | unsigned long nblocks,int join); | |
117 | ||
118 | static void init_journal_hash(struct super_block *p_s_sb) { | |
119 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
120 | memset(journal->j_hash_table, 0, JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)) ; | |
121 | } | |
122 | ||
123 | /* | |
124 | ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to | |
125 | ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for | |
126 | ** more details. | |
127 | */ | |
128 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) { | |
129 | if (bh) { | |
130 | clear_buffer_dirty(bh); | |
131 | clear_buffer_journal_test(bh); | |
132 | } | |
133 | return 0 ; | |
134 | } | |
135 | ||
136 | static void disable_barrier(struct super_block *s) | |
137 | { | |
138 | REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_BARRIER_FLUSH); | |
139 | printk("reiserfs: disabling flush barriers on %s\n", reiserfs_bdevname(s)); | |
140 | } | |
141 | ||
142 | static struct reiserfs_bitmap_node * | |
143 | allocate_bitmap_node(struct super_block *p_s_sb) { | |
144 | struct reiserfs_bitmap_node *bn ; | |
145 | static int id; | |
146 | ||
147 | bn = reiserfs_kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS, p_s_sb) ; | |
148 | if (!bn) { | |
149 | return NULL ; | |
150 | } | |
151 | bn->data = reiserfs_kmalloc(p_s_sb->s_blocksize, GFP_NOFS, p_s_sb) ; | |
152 | if (!bn->data) { | |
153 | reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ; | |
154 | return NULL ; | |
155 | } | |
156 | bn->id = id++ ; | |
157 | memset(bn->data, 0, p_s_sb->s_blocksize) ; | |
158 | INIT_LIST_HEAD(&bn->list) ; | |
159 | return bn ; | |
160 | } | |
161 | ||
162 | static struct reiserfs_bitmap_node * | |
163 | get_bitmap_node(struct super_block *p_s_sb) { | |
164 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
165 | struct reiserfs_bitmap_node *bn = NULL; | |
166 | struct list_head *entry = journal->j_bitmap_nodes.next ; | |
167 | ||
168 | journal->j_used_bitmap_nodes++ ; | |
169 | repeat: | |
170 | ||
171 | if(entry != &journal->j_bitmap_nodes) { | |
172 | bn = list_entry(entry, struct reiserfs_bitmap_node, list) ; | |
173 | list_del(entry) ; | |
174 | memset(bn->data, 0, p_s_sb->s_blocksize) ; | |
175 | journal->j_free_bitmap_nodes-- ; | |
176 | return bn ; | |
177 | } | |
178 | bn = allocate_bitmap_node(p_s_sb) ; | |
179 | if (!bn) { | |
180 | yield(); | |
181 | goto repeat ; | |
182 | } | |
183 | return bn ; | |
184 | } | |
185 | static inline void free_bitmap_node(struct super_block *p_s_sb, | |
186 | struct reiserfs_bitmap_node *bn) { | |
187 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
188 | journal->j_used_bitmap_nodes-- ; | |
189 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { | |
190 | reiserfs_kfree(bn->data, p_s_sb->s_blocksize, p_s_sb) ; | |
191 | reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ; | |
192 | } else { | |
193 | list_add(&bn->list, &journal->j_bitmap_nodes) ; | |
194 | journal->j_free_bitmap_nodes++ ; | |
195 | } | |
196 | } | |
197 | ||
198 | static void allocate_bitmap_nodes(struct super_block *p_s_sb) { | |
199 | int i ; | |
200 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
201 | struct reiserfs_bitmap_node *bn = NULL ; | |
202 | for (i = 0 ; i < REISERFS_MIN_BITMAP_NODES ; i++) { | |
203 | bn = allocate_bitmap_node(p_s_sb) ; | |
204 | if (bn) { | |
205 | list_add(&bn->list, &journal->j_bitmap_nodes) ; | |
206 | journal->j_free_bitmap_nodes++ ; | |
207 | } else { | |
208 | break ; // this is ok, we'll try again when more are needed | |
209 | } | |
210 | } | |
211 | } | |
212 | ||
213 | static int set_bit_in_list_bitmap(struct super_block *p_s_sb, int block, | |
214 | struct reiserfs_list_bitmap *jb) { | |
215 | int bmap_nr = block / (p_s_sb->s_blocksize << 3) ; | |
216 | int bit_nr = block % (p_s_sb->s_blocksize << 3) ; | |
217 | ||
218 | if (!jb->bitmaps[bmap_nr]) { | |
219 | jb->bitmaps[bmap_nr] = get_bitmap_node(p_s_sb) ; | |
220 | } | |
221 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data) ; | |
222 | return 0 ; | |
223 | } | |
224 | ||
225 | static void cleanup_bitmap_list(struct super_block *p_s_sb, | |
226 | struct reiserfs_list_bitmap *jb) { | |
227 | int i; | |
228 | if (jb->bitmaps == NULL) | |
229 | return; | |
230 | ||
231 | for (i = 0 ; i < SB_BMAP_NR(p_s_sb) ; i++) { | |
232 | if (jb->bitmaps[i]) { | |
233 | free_bitmap_node(p_s_sb, jb->bitmaps[i]) ; | |
234 | jb->bitmaps[i] = NULL ; | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | /* | |
240 | ** only call this on FS unmount. | |
241 | */ | |
242 | static int free_list_bitmaps(struct super_block *p_s_sb, | |
243 | struct reiserfs_list_bitmap *jb_array) { | |
244 | int i ; | |
245 | struct reiserfs_list_bitmap *jb ; | |
246 | for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) { | |
247 | jb = jb_array + i ; | |
248 | jb->journal_list = NULL ; | |
249 | cleanup_bitmap_list(p_s_sb, jb) ; | |
250 | vfree(jb->bitmaps) ; | |
251 | jb->bitmaps = NULL ; | |
252 | } | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static int free_bitmap_nodes(struct super_block *p_s_sb) { | |
257 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
258 | struct list_head *next = journal->j_bitmap_nodes.next ; | |
259 | struct reiserfs_bitmap_node *bn ; | |
260 | ||
261 | while(next != &journal->j_bitmap_nodes) { | |
262 | bn = list_entry(next, struct reiserfs_bitmap_node, list) ; | |
263 | list_del(next) ; | |
264 | reiserfs_kfree(bn->data, p_s_sb->s_blocksize, p_s_sb) ; | |
265 | reiserfs_kfree(bn, sizeof(struct reiserfs_bitmap_node), p_s_sb) ; | |
266 | next = journal->j_bitmap_nodes.next ; | |
267 | journal->j_free_bitmap_nodes-- ; | |
268 | } | |
269 | ||
270 | return 0 ; | |
271 | } | |
272 | ||
273 | /* | |
274 | ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. | |
275 | ** jb_array is the array to be filled in. | |
276 | */ | |
277 | int reiserfs_allocate_list_bitmaps(struct super_block *p_s_sb, | |
278 | struct reiserfs_list_bitmap *jb_array, | |
279 | int bmap_nr) { | |
280 | int i ; | |
281 | int failed = 0 ; | |
282 | struct reiserfs_list_bitmap *jb ; | |
283 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *) ; | |
284 | ||
285 | for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) { | |
286 | jb = jb_array + i ; | |
287 | jb->journal_list = NULL ; | |
288 | jb->bitmaps = vmalloc( mem ) ; | |
289 | if (!jb->bitmaps) { | |
290 | reiserfs_warning(p_s_sb, "clm-2000, unable to allocate bitmaps for journal lists") ; | |
291 | failed = 1; | |
292 | break ; | |
293 | } | |
294 | memset(jb->bitmaps, 0, mem) ; | |
295 | } | |
296 | if (failed) { | |
297 | free_list_bitmaps(p_s_sb, jb_array) ; | |
298 | return -1 ; | |
299 | } | |
300 | return 0 ; | |
301 | } | |
302 | ||
303 | /* | |
304 | ** find an available list bitmap. If you can't find one, flush a commit list | |
305 | ** and try again | |
306 | */ | |
307 | static struct reiserfs_list_bitmap * | |
308 | get_list_bitmap(struct super_block *p_s_sb, struct reiserfs_journal_list *jl) { | |
309 | int i,j ; | |
310 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
311 | struct reiserfs_list_bitmap *jb = NULL ; | |
312 | ||
313 | for (j = 0 ; j < (JOURNAL_NUM_BITMAPS * 3) ; j++) { | |
314 | i = journal->j_list_bitmap_index ; | |
315 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS ; | |
316 | jb = journal->j_list_bitmap + i ; | |
317 | if (journal->j_list_bitmap[i].journal_list) { | |
318 | flush_commit_list(p_s_sb, journal->j_list_bitmap[i].journal_list, 1) ; | |
319 | if (!journal->j_list_bitmap[i].journal_list) { | |
320 | break ; | |
321 | } | |
322 | } else { | |
323 | break ; | |
324 | } | |
325 | } | |
326 | if (jb->journal_list) { /* double check to make sure if flushed correctly */ | |
327 | return NULL ; | |
328 | } | |
329 | jb->journal_list = jl ; | |
330 | return jb ; | |
331 | } | |
332 | ||
333 | /* | |
334 | ** allocates a new chunk of X nodes, and links them all together as a list. | |
335 | ** Uses the cnode->next and cnode->prev pointers | |
336 | ** returns NULL on failure | |
337 | */ | |
338 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) { | |
339 | struct reiserfs_journal_cnode *head ; | |
340 | int i ; | |
341 | if (num_cnodes <= 0) { | |
342 | return NULL ; | |
343 | } | |
344 | head = vmalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)) ; | |
345 | if (!head) { | |
346 | return NULL ; | |
347 | } | |
348 | memset(head, 0, num_cnodes * sizeof(struct reiserfs_journal_cnode)) ; | |
349 | head[0].prev = NULL ; | |
350 | head[0].next = head + 1 ; | |
351 | for (i = 1 ; i < num_cnodes; i++) { | |
352 | head[i].prev = head + (i - 1) ; | |
353 | head[i].next = head + (i + 1) ; /* if last one, overwrite it after the if */ | |
354 | } | |
355 | head[num_cnodes -1].next = NULL ; | |
356 | return head ; | |
357 | } | |
358 | ||
359 | /* | |
360 | ** pulls a cnode off the free list, or returns NULL on failure | |
361 | */ | |
362 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *p_s_sb) { | |
363 | struct reiserfs_journal_cnode *cn ; | |
364 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
365 | ||
366 | reiserfs_check_lock_depth(p_s_sb, "get_cnode") ; | |
367 | ||
368 | if (journal->j_cnode_free <= 0) { | |
369 | return NULL ; | |
370 | } | |
371 | journal->j_cnode_used++ ; | |
372 | journal->j_cnode_free-- ; | |
373 | cn = journal->j_cnode_free_list ; | |
374 | if (!cn) { | |
375 | return cn ; | |
376 | } | |
377 | if (cn->next) { | |
378 | cn->next->prev = NULL ; | |
379 | } | |
380 | journal->j_cnode_free_list = cn->next ; | |
381 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; | |
382 | return cn ; | |
383 | } | |
384 | ||
385 | /* | |
386 | ** returns a cnode to the free list | |
387 | */ | |
388 | static void free_cnode(struct super_block *p_s_sb, struct reiserfs_journal_cnode *cn) { | |
389 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
390 | ||
391 | reiserfs_check_lock_depth(p_s_sb, "free_cnode") ; | |
392 | ||
393 | journal->j_cnode_used-- ; | |
394 | journal->j_cnode_free++ ; | |
395 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ | |
396 | cn->next = journal->j_cnode_free_list ; | |
397 | if (journal->j_cnode_free_list) { | |
398 | journal->j_cnode_free_list->prev = cn ; | |
399 | } | |
400 | cn->prev = NULL ; /* not needed with the memset, but I might kill the memset, and forget to do this */ | |
401 | journal->j_cnode_free_list = cn ; | |
402 | } | |
403 | ||
404 | static void clear_prepared_bits(struct buffer_head *bh) { | |
405 | clear_buffer_journal_prepared (bh); | |
406 | clear_buffer_journal_restore_dirty (bh); | |
407 | } | |
408 | ||
409 | /* utility function to force a BUG if it is called without the big | |
410 | ** kernel lock held. caller is the string printed just before calling BUG() | |
411 | */ | |
412 | void reiserfs_check_lock_depth(struct super_block *sb, char *caller) { | |
413 | #ifdef CONFIG_SMP | |
414 | if (current->lock_depth < 0) { | |
415 | reiserfs_panic (sb, "%s called without kernel lock held", caller) ; | |
416 | } | |
417 | #else | |
418 | ; | |
419 | #endif | |
420 | } | |
421 | ||
422 | /* return a cnode with same dev, block number and size in table, or null if not found */ | |
423 | static inline struct reiserfs_journal_cnode * | |
424 | get_journal_hash_dev(struct super_block *sb, | |
425 | struct reiserfs_journal_cnode **table, | |
426 | long bl) | |
427 | { | |
428 | struct reiserfs_journal_cnode *cn ; | |
429 | cn = journal_hash(table, sb, bl) ; | |
430 | while(cn) { | |
431 | if (cn->blocknr == bl && cn->sb == sb) | |
432 | return cn ; | |
433 | cn = cn->hnext ; | |
434 | } | |
435 | return (struct reiserfs_journal_cnode *)0 ; | |
436 | } | |
437 | ||
438 | /* | |
439 | ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated | |
440 | ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever | |
441 | ** being overwritten by a replay after crashing. | |
442 | ** | |
443 | ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting | |
444 | ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make | |
445 | ** sure you never write the block without logging it. | |
446 | ** | |
447 | ** next_zero_bit is a suggestion about the next block to try for find_forward. | |
448 | ** when bl is rejected because it is set in a journal list bitmap, we search | |
449 | ** for the next zero bit in the bitmap that rejected bl. Then, we return that | |
450 | ** through next_zero_bit for find_forward to try. | |
451 | ** | |
452 | ** Just because we return something in next_zero_bit does not mean we won't | |
453 | ** reject it on the next call to reiserfs_in_journal | |
454 | ** | |
455 | */ | |
456 | int reiserfs_in_journal(struct super_block *p_s_sb, | |
457 | int bmap_nr, int bit_nr, int search_all, | |
458 | b_blocknr_t *next_zero_bit) { | |
459 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
460 | struct reiserfs_journal_cnode *cn ; | |
461 | struct reiserfs_list_bitmap *jb ; | |
462 | int i ; | |
463 | unsigned long bl; | |
464 | ||
465 | *next_zero_bit = 0 ; /* always start this at zero. */ | |
466 | ||
467 | PROC_INFO_INC( p_s_sb, journal.in_journal ); | |
468 | /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. | |
469 | ** if we crash before the transaction that freed it commits, this transaction won't | |
470 | ** have committed either, and the block will never be written | |
471 | */ | |
472 | if (search_all) { | |
473 | for (i = 0 ; i < JOURNAL_NUM_BITMAPS ; i++) { | |
474 | PROC_INFO_INC( p_s_sb, journal.in_journal_bitmap ); | |
475 | jb = journal->j_list_bitmap + i ; | |
476 | if (jb->journal_list && jb->bitmaps[bmap_nr] && | |
477 | test_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data)) { | |
478 | *next_zero_bit = find_next_zero_bit((unsigned long *) | |
479 | (jb->bitmaps[bmap_nr]->data), | |
480 | p_s_sb->s_blocksize << 3, bit_nr+1) ; | |
481 | return 1 ; | |
482 | } | |
483 | } | |
484 | } | |
485 | ||
486 | bl = bmap_nr * (p_s_sb->s_blocksize << 3) + bit_nr; | |
487 | /* is it in any old transactions? */ | |
488 | if (search_all && (cn = get_journal_hash_dev(p_s_sb, journal->j_list_hash_table, bl))) { | |
489 | return 1; | |
490 | } | |
491 | ||
492 | /* is it in the current transaction. This should never happen */ | |
493 | if ((cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, bl))) { | |
494 | BUG(); | |
495 | return 1; | |
496 | } | |
497 | ||
498 | PROC_INFO_INC( p_s_sb, journal.in_journal_reusable ); | |
499 | /* safe for reuse */ | |
500 | return 0 ; | |
501 | } | |
502 | ||
503 | /* insert cn into table | |
504 | */ | |
505 | static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, struct reiserfs_journal_cnode *cn) { | |
506 | struct reiserfs_journal_cnode *cn_orig ; | |
507 | ||
508 | cn_orig = journal_hash(table, cn->sb, cn->blocknr) ; | |
509 | cn->hnext = cn_orig ; | |
510 | cn->hprev = NULL ; | |
511 | if (cn_orig) { | |
512 | cn_orig->hprev = cn ; | |
513 | } | |
514 | journal_hash(table, cn->sb, cn->blocknr) = cn ; | |
515 | } | |
516 | ||
517 | /* lock the current transaction */ | |
518 | inline static void lock_journal(struct super_block *p_s_sb) { | |
519 | PROC_INFO_INC( p_s_sb, journal.lock_journal ); | |
520 | down(&SB_JOURNAL(p_s_sb)->j_lock); | |
521 | } | |
522 | ||
523 | /* unlock the current transaction */ | |
524 | inline static void unlock_journal(struct super_block *p_s_sb) { | |
525 | up(&SB_JOURNAL(p_s_sb)->j_lock); | |
526 | } | |
527 | ||
528 | static inline void get_journal_list(struct reiserfs_journal_list *jl) | |
529 | { | |
530 | jl->j_refcount++; | |
531 | } | |
532 | ||
533 | static inline void put_journal_list(struct super_block *s, | |
534 | struct reiserfs_journal_list *jl) | |
535 | { | |
536 | if (jl->j_refcount < 1) { | |
537 | reiserfs_panic (s, "trans id %lu, refcount at %d", jl->j_trans_id, | |
538 | jl->j_refcount); | |
539 | } | |
540 | if (--jl->j_refcount == 0) | |
541 | reiserfs_kfree(jl, sizeof(struct reiserfs_journal_list), s); | |
542 | } | |
543 | ||
544 | /* | |
545 | ** this used to be much more involved, and I'm keeping it just in case things get ugly again. | |
546 | ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a | |
547 | ** transaction. | |
548 | */ | |
549 | static void cleanup_freed_for_journal_list(struct super_block *p_s_sb, struct reiserfs_journal_list *jl) { | |
550 | ||
551 | struct reiserfs_list_bitmap *jb = jl->j_list_bitmap ; | |
552 | if (jb) { | |
553 | cleanup_bitmap_list(p_s_sb, jb) ; | |
554 | } | |
555 | jl->j_list_bitmap->journal_list = NULL ; | |
556 | jl->j_list_bitmap = NULL ; | |
557 | } | |
558 | ||
559 | static int journal_list_still_alive(struct super_block *s, | |
560 | unsigned long trans_id) | |
561 | { | |
562 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
563 | struct list_head *entry = &journal->j_journal_list; | |
564 | struct reiserfs_journal_list *jl; | |
565 | ||
566 | if (!list_empty(entry)) { | |
567 | jl = JOURNAL_LIST_ENTRY(entry->next); | |
568 | if (jl->j_trans_id <= trans_id) { | |
569 | return 1; | |
570 | } | |
571 | } | |
572 | return 0; | |
573 | } | |
574 | ||
575 | static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) { | |
576 | char b[BDEVNAME_SIZE]; | |
577 | ||
578 | if (buffer_journaled(bh)) { | |
579 | reiserfs_warning(NULL, "clm-2084: pinned buffer %lu:%s sent to disk", | |
580 | bh->b_blocknr, bdevname(bh->b_bdev, b)) ; | |
581 | } | |
582 | if (uptodate) | |
583 | set_buffer_uptodate(bh) ; | |
584 | else | |
585 | clear_buffer_uptodate(bh) ; | |
586 | unlock_buffer(bh) ; | |
587 | put_bh(bh) ; | |
588 | } | |
589 | ||
590 | static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) { | |
591 | if (uptodate) | |
592 | set_buffer_uptodate(bh) ; | |
593 | else | |
594 | clear_buffer_uptodate(bh) ; | |
595 | unlock_buffer(bh) ; | |
596 | put_bh(bh) ; | |
597 | } | |
598 | ||
599 | static void submit_logged_buffer(struct buffer_head *bh) { | |
600 | get_bh(bh) ; | |
601 | bh->b_end_io = reiserfs_end_buffer_io_sync ; | |
602 | clear_buffer_journal_new (bh); | |
603 | clear_buffer_dirty(bh) ; | |
604 | if (!test_clear_buffer_journal_test (bh)) | |
605 | BUG(); | |
606 | if (!buffer_uptodate(bh)) | |
607 | BUG(); | |
608 | submit_bh(WRITE, bh) ; | |
609 | } | |
610 | ||
611 | static void submit_ordered_buffer(struct buffer_head *bh) { | |
612 | get_bh(bh) ; | |
613 | bh->b_end_io = reiserfs_end_ordered_io; | |
614 | clear_buffer_dirty(bh) ; | |
615 | if (!buffer_uptodate(bh)) | |
616 | BUG(); | |
617 | submit_bh(WRITE, bh) ; | |
618 | } | |
619 | ||
620 | static int submit_barrier_buffer(struct buffer_head *bh) { | |
621 | get_bh(bh) ; | |
622 | bh->b_end_io = reiserfs_end_ordered_io; | |
623 | clear_buffer_dirty(bh) ; | |
624 | if (!buffer_uptodate(bh)) | |
625 | BUG(); | |
626 | return submit_bh(WRITE_BARRIER, bh) ; | |
627 | } | |
628 | ||
629 | static void check_barrier_completion(struct super_block *s, | |
630 | struct buffer_head *bh) { | |
631 | if (buffer_eopnotsupp(bh)) { | |
632 | clear_buffer_eopnotsupp(bh); | |
633 | disable_barrier(s); | |
634 | set_buffer_uptodate(bh); | |
635 | set_buffer_dirty(bh); | |
636 | sync_dirty_buffer(bh); | |
637 | } | |
638 | } | |
639 | ||
640 | #define CHUNK_SIZE 32 | |
641 | struct buffer_chunk { | |
642 | struct buffer_head *bh[CHUNK_SIZE]; | |
643 | int nr; | |
644 | }; | |
645 | ||
646 | static void write_chunk(struct buffer_chunk *chunk) { | |
647 | int i; | |
22e2c507 | 648 | get_fs_excl(); |
1da177e4 LT |
649 | for (i = 0; i < chunk->nr ; i++) { |
650 | submit_logged_buffer(chunk->bh[i]) ; | |
651 | } | |
652 | chunk->nr = 0; | |
22e2c507 | 653 | put_fs_excl(); |
1da177e4 LT |
654 | } |
655 | ||
656 | static void write_ordered_chunk(struct buffer_chunk *chunk) { | |
657 | int i; | |
22e2c507 | 658 | get_fs_excl(); |
1da177e4 LT |
659 | for (i = 0; i < chunk->nr ; i++) { |
660 | submit_ordered_buffer(chunk->bh[i]) ; | |
661 | } | |
662 | chunk->nr = 0; | |
22e2c507 | 663 | put_fs_excl(); |
1da177e4 LT |
664 | } |
665 | ||
666 | static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, | |
667 | spinlock_t *lock, | |
668 | void (fn)(struct buffer_chunk *)) | |
669 | { | |
670 | int ret = 0; | |
671 | if (chunk->nr >= CHUNK_SIZE) | |
672 | BUG(); | |
673 | chunk->bh[chunk->nr++] = bh; | |
674 | if (chunk->nr >= CHUNK_SIZE) { | |
675 | ret = 1; | |
676 | if (lock) | |
677 | spin_unlock(lock); | |
678 | fn(chunk); | |
679 | if (lock) | |
680 | spin_lock(lock); | |
681 | } | |
682 | return ret; | |
683 | } | |
684 | ||
685 | ||
686 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); | |
687 | static struct reiserfs_jh *alloc_jh(void) { | |
688 | struct reiserfs_jh *jh; | |
689 | while(1) { | |
690 | jh = kmalloc(sizeof(*jh), GFP_NOFS); | |
691 | if (jh) { | |
692 | atomic_inc(&nr_reiserfs_jh); | |
693 | return jh; | |
694 | } | |
695 | yield(); | |
696 | } | |
697 | } | |
698 | ||
699 | /* | |
700 | * we want to free the jh when the buffer has been written | |
701 | * and waited on | |
702 | */ | |
703 | void reiserfs_free_jh(struct buffer_head *bh) { | |
704 | struct reiserfs_jh *jh; | |
705 | ||
706 | jh = bh->b_private; | |
707 | if (jh) { | |
708 | bh->b_private = NULL; | |
709 | jh->bh = NULL; | |
710 | list_del_init(&jh->list); | |
711 | kfree(jh); | |
712 | if (atomic_read(&nr_reiserfs_jh) <= 0) | |
713 | BUG(); | |
714 | atomic_dec(&nr_reiserfs_jh); | |
715 | put_bh(bh); | |
716 | } | |
717 | } | |
718 | ||
719 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, | |
720 | int tail) | |
721 | { | |
722 | struct reiserfs_jh *jh; | |
723 | ||
724 | if (bh->b_private) { | |
725 | spin_lock(&j->j_dirty_buffers_lock); | |
726 | if (!bh->b_private) { | |
727 | spin_unlock(&j->j_dirty_buffers_lock); | |
728 | goto no_jh; | |
729 | } | |
730 | jh = bh->b_private; | |
731 | list_del_init(&jh->list); | |
732 | } else { | |
733 | no_jh: | |
734 | get_bh(bh); | |
735 | jh = alloc_jh(); | |
736 | spin_lock(&j->j_dirty_buffers_lock); | |
737 | /* buffer must be locked for __add_jh, should be able to have | |
738 | * two adds at the same time | |
739 | */ | |
740 | if (bh->b_private) | |
741 | BUG(); | |
742 | jh->bh = bh; | |
743 | bh->b_private = jh; | |
744 | } | |
745 | jh->jl = j->j_current_jl; | |
746 | if (tail) | |
747 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); | |
748 | else { | |
749 | list_add_tail(&jh->list, &jh->jl->j_bh_list); | |
750 | } | |
751 | spin_unlock(&j->j_dirty_buffers_lock); | |
752 | return 0; | |
753 | } | |
754 | ||
755 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) { | |
756 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); | |
757 | } | |
758 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) { | |
759 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); | |
760 | } | |
761 | ||
762 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) | |
763 | static int write_ordered_buffers(spinlock_t *lock, | |
764 | struct reiserfs_journal *j, | |
765 | struct reiserfs_journal_list *jl, | |
766 | struct list_head *list) | |
767 | { | |
768 | struct buffer_head *bh; | |
769 | struct reiserfs_jh *jh; | |
770 | int ret = j->j_errno; | |
771 | struct buffer_chunk chunk; | |
772 | struct list_head tmp; | |
773 | INIT_LIST_HEAD(&tmp); | |
774 | ||
775 | chunk.nr = 0; | |
776 | spin_lock(lock); | |
777 | while(!list_empty(list)) { | |
778 | jh = JH_ENTRY(list->next); | |
779 | bh = jh->bh; | |
780 | get_bh(bh); | |
781 | if (test_set_buffer_locked(bh)) { | |
782 | if (!buffer_dirty(bh)) { | |
783 | list_del_init(&jh->list); | |
784 | list_add(&jh->list, &tmp); | |
785 | goto loop_next; | |
786 | } | |
787 | spin_unlock(lock); | |
788 | if (chunk.nr) | |
789 | write_ordered_chunk(&chunk); | |
790 | wait_on_buffer(bh); | |
791 | cond_resched(); | |
792 | spin_lock(lock); | |
793 | goto loop_next; | |
794 | } | |
795 | if (buffer_dirty(bh)) { | |
796 | list_del_init(&jh->list); | |
797 | list_add(&jh->list, &tmp); | |
798 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); | |
799 | } else { | |
800 | reiserfs_free_jh(bh); | |
801 | unlock_buffer(bh); | |
802 | } | |
803 | loop_next: | |
804 | put_bh(bh); | |
805 | cond_resched_lock(lock); | |
806 | } | |
807 | if (chunk.nr) { | |
808 | spin_unlock(lock); | |
809 | write_ordered_chunk(&chunk); | |
810 | spin_lock(lock); | |
811 | } | |
812 | while(!list_empty(&tmp)) { | |
813 | jh = JH_ENTRY(tmp.prev); | |
814 | bh = jh->bh; | |
815 | get_bh(bh); | |
816 | reiserfs_free_jh(bh); | |
817 | ||
818 | if (buffer_locked(bh)) { | |
819 | spin_unlock(lock); | |
820 | wait_on_buffer(bh); | |
821 | spin_lock(lock); | |
822 | } | |
823 | if (!buffer_uptodate(bh)) { | |
824 | ret = -EIO; | |
825 | } | |
826 | put_bh(bh); | |
827 | cond_resched_lock(lock); | |
828 | } | |
829 | spin_unlock(lock); | |
830 | return ret; | |
831 | } | |
832 | ||
833 | static int flush_older_commits(struct super_block *s, struct reiserfs_journal_list *jl) { | |
834 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
835 | struct reiserfs_journal_list *other_jl; | |
836 | struct reiserfs_journal_list *first_jl; | |
837 | struct list_head *entry; | |
838 | unsigned long trans_id = jl->j_trans_id; | |
839 | unsigned long other_trans_id; | |
840 | unsigned long first_trans_id; | |
841 | ||
842 | find_first: | |
843 | /* | |
844 | * first we walk backwards to find the oldest uncommitted transation | |
845 | */ | |
846 | first_jl = jl; | |
847 | entry = jl->j_list.prev; | |
848 | while(1) { | |
849 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
850 | if (entry == &journal->j_journal_list || | |
851 | atomic_read(&other_jl->j_older_commits_done)) | |
852 | break; | |
853 | ||
854 | first_jl = other_jl; | |
855 | entry = other_jl->j_list.prev; | |
856 | } | |
857 | ||
858 | /* if we didn't find any older uncommitted transactions, return now */ | |
859 | if (first_jl == jl) { | |
860 | return 0; | |
861 | } | |
862 | ||
863 | first_trans_id = first_jl->j_trans_id; | |
864 | ||
865 | entry = &first_jl->j_list; | |
866 | while(1) { | |
867 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
868 | other_trans_id = other_jl->j_trans_id; | |
869 | ||
870 | if (other_trans_id < trans_id) { | |
871 | if (atomic_read(&other_jl->j_commit_left) != 0) { | |
872 | flush_commit_list(s, other_jl, 0); | |
873 | ||
874 | /* list we were called with is gone, return */ | |
875 | if (!journal_list_still_alive(s, trans_id)) | |
876 | return 1; | |
877 | ||
878 | /* the one we just flushed is gone, this means all | |
879 | * older lists are also gone, so first_jl is no longer | |
880 | * valid either. Go back to the beginning. | |
881 | */ | |
882 | if (!journal_list_still_alive(s, other_trans_id)) { | |
883 | goto find_first; | |
884 | } | |
885 | } | |
886 | entry = entry->next; | |
887 | if (entry == &journal->j_journal_list) | |
888 | return 0; | |
889 | } else { | |
890 | return 0; | |
891 | } | |
892 | } | |
893 | return 0; | |
894 | } | |
895 | int reiserfs_async_progress_wait(struct super_block *s) { | |
896 | DEFINE_WAIT(wait); | |
897 | struct reiserfs_journal *j = SB_JOURNAL(s); | |
898 | if (atomic_read(&j->j_async_throttle)) | |
899 | blk_congestion_wait(WRITE, HZ/10); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | /* | |
904 | ** if this journal list still has commit blocks unflushed, send them to disk. | |
905 | ** | |
906 | ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) | |
907 | ** Before the commit block can by written, every other log block must be safely on disk | |
908 | ** | |
909 | */ | |
910 | static int flush_commit_list(struct super_block *s, struct reiserfs_journal_list *jl, int flushall) { | |
911 | int i; | |
912 | int bn ; | |
913 | struct buffer_head *tbh = NULL ; | |
914 | unsigned long trans_id = jl->j_trans_id; | |
915 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
916 | int barrier = 0; | |
917 | int retval = 0; | |
918 | ||
919 | reiserfs_check_lock_depth(s, "flush_commit_list") ; | |
920 | ||
921 | if (atomic_read(&jl->j_older_commits_done)) { | |
922 | return 0 ; | |
923 | } | |
924 | ||
22e2c507 JA |
925 | get_fs_excl(); |
926 | ||
1da177e4 LT |
927 | /* before we can put our commit blocks on disk, we have to make sure everyone older than |
928 | ** us is on disk too | |
929 | */ | |
930 | BUG_ON (jl->j_len <= 0); | |
931 | BUG_ON (trans_id == journal->j_trans_id); | |
932 | ||
933 | get_journal_list(jl); | |
934 | if (flushall) { | |
935 | if (flush_older_commits(s, jl) == 1) { | |
936 | /* list disappeared during flush_older_commits. return */ | |
937 | goto put_jl; | |
938 | } | |
939 | } | |
940 | ||
941 | /* make sure nobody is trying to flush this one at the same time */ | |
942 | down(&jl->j_commit_lock); | |
943 | if (!journal_list_still_alive(s, trans_id)) { | |
944 | up(&jl->j_commit_lock); | |
945 | goto put_jl; | |
946 | } | |
947 | BUG_ON (jl->j_trans_id == 0); | |
948 | ||
949 | /* this commit is done, exit */ | |
950 | if (atomic_read(&(jl->j_commit_left)) <= 0) { | |
951 | if (flushall) { | |
952 | atomic_set(&(jl->j_older_commits_done), 1) ; | |
953 | } | |
954 | up(&jl->j_commit_lock); | |
955 | goto put_jl; | |
956 | } | |
957 | ||
958 | if (!list_empty(&jl->j_bh_list)) { | |
959 | unlock_kernel(); | |
960 | write_ordered_buffers(&journal->j_dirty_buffers_lock, | |
961 | journal, jl, &jl->j_bh_list); | |
962 | lock_kernel(); | |
963 | } | |
964 | BUG_ON (!list_empty(&jl->j_bh_list)); | |
965 | /* | |
966 | * for the description block and all the log blocks, submit any buffers | |
967 | * that haven't already reached the disk | |
968 | */ | |
969 | atomic_inc(&journal->j_async_throttle); | |
970 | for (i = 0 ; i < (jl->j_len + 1) ; i++) { | |
971 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start+i) % | |
972 | SB_ONDISK_JOURNAL_SIZE(s); | |
973 | tbh = journal_find_get_block(s, bn) ; | |
974 | if (buffer_dirty(tbh)) /* redundant, ll_rw_block() checks */ | |
975 | ll_rw_block(WRITE, 1, &tbh) ; | |
976 | put_bh(tbh) ; | |
977 | } | |
978 | atomic_dec(&journal->j_async_throttle); | |
979 | ||
980 | /* wait on everything written so far before writing the commit | |
981 | * if we are in barrier mode, send the commit down now | |
982 | */ | |
983 | barrier = reiserfs_barrier_flush(s); | |
984 | if (barrier) { | |
985 | int ret; | |
986 | lock_buffer(jl->j_commit_bh); | |
987 | ret = submit_barrier_buffer(jl->j_commit_bh); | |
988 | if (ret == -EOPNOTSUPP) { | |
989 | set_buffer_uptodate(jl->j_commit_bh); | |
990 | disable_barrier(s); | |
991 | barrier = 0; | |
992 | } | |
993 | } | |
994 | for (i = 0 ; i < (jl->j_len + 1) ; i++) { | |
995 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + | |
996 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s) ; | |
997 | tbh = journal_find_get_block(s, bn) ; | |
998 | wait_on_buffer(tbh) ; | |
999 | // since we're using ll_rw_blk above, it might have skipped over | |
1000 | // a locked buffer. Double check here | |
1001 | // | |
1002 | if (buffer_dirty(tbh)) /* redundant, sync_dirty_buffer() checks */ | |
1003 | sync_dirty_buffer(tbh); | |
1004 | if (unlikely (!buffer_uptodate(tbh))) { | |
1005 | #ifdef CONFIG_REISERFS_CHECK | |
1006 | reiserfs_warning(s, "journal-601, buffer write failed") ; | |
1007 | #endif | |
1008 | retval = -EIO; | |
1009 | } | |
1010 | put_bh(tbh) ; /* once for journal_find_get_block */ | |
1011 | put_bh(tbh) ; /* once due to original getblk in do_journal_end */ | |
1012 | atomic_dec(&(jl->j_commit_left)) ; | |
1013 | } | |
1014 | ||
1015 | BUG_ON (atomic_read(&(jl->j_commit_left)) != 1); | |
1016 | ||
1017 | if (!barrier) { | |
1018 | if (buffer_dirty(jl->j_commit_bh)) | |
1019 | BUG(); | |
1020 | mark_buffer_dirty(jl->j_commit_bh) ; | |
1021 | sync_dirty_buffer(jl->j_commit_bh) ; | |
1022 | } else | |
1023 | wait_on_buffer(jl->j_commit_bh); | |
1024 | ||
1025 | check_barrier_completion(s, jl->j_commit_bh); | |
1026 | ||
1027 | /* If there was a write error in the journal - we can't commit this | |
1028 | * transaction - it will be invalid and, if successful, will just end | |
1029 | * up propogating the write error out to the filesystem. */ | |
1030 | if (unlikely (!buffer_uptodate(jl->j_commit_bh))) { | |
1031 | #ifdef CONFIG_REISERFS_CHECK | |
1032 | reiserfs_warning(s, "journal-615: buffer write failed") ; | |
1033 | #endif | |
1034 | retval = -EIO; | |
1035 | } | |
1036 | bforget(jl->j_commit_bh) ; | |
1037 | if (journal->j_last_commit_id != 0 && | |
1038 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { | |
1039 | reiserfs_warning(s, "clm-2200: last commit %lu, current %lu", | |
1040 | journal->j_last_commit_id, | |
1041 | jl->j_trans_id); | |
1042 | } | |
1043 | journal->j_last_commit_id = jl->j_trans_id; | |
1044 | ||
1045 | /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ | |
1046 | cleanup_freed_for_journal_list(s, jl) ; | |
1047 | ||
1048 | retval = retval ? retval : journal->j_errno; | |
1049 | ||
1050 | /* mark the metadata dirty */ | |
1051 | if (!retval) | |
1052 | dirty_one_transaction(s, jl); | |
1053 | atomic_dec(&(jl->j_commit_left)) ; | |
1054 | ||
1055 | if (flushall) { | |
1056 | atomic_set(&(jl->j_older_commits_done), 1) ; | |
1057 | } | |
1058 | up(&jl->j_commit_lock); | |
1059 | put_jl: | |
1060 | put_journal_list(s, jl); | |
1061 | ||
1062 | if (retval) | |
1063 | reiserfs_abort (s, retval, "Journal write error in %s", __FUNCTION__); | |
22e2c507 | 1064 | put_fs_excl(); |
1da177e4 LT |
1065 | return retval; |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or | |
1070 | ** returns NULL if it can't find anything | |
1071 | */ | |
1072 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct reiserfs_journal_cnode *cn) { | |
1073 | struct super_block *sb = cn->sb; | |
1074 | b_blocknr_t blocknr = cn->blocknr ; | |
1075 | ||
1076 | cn = cn->hprev ; | |
1077 | while(cn) { | |
1078 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { | |
1079 | return cn->jlist ; | |
1080 | } | |
1081 | cn = cn->hprev ; | |
1082 | } | |
1083 | return NULL ; | |
1084 | } | |
1085 | ||
1086 | static void remove_journal_hash(struct super_block *, struct reiserfs_journal_cnode **, | |
1087 | struct reiserfs_journal_list *, unsigned long, int); | |
1088 | ||
1089 | /* | |
1090 | ** once all the real blocks have been flushed, it is safe to remove them from the | |
1091 | ** journal list for this transaction. Aside from freeing the cnode, this also allows the | |
1092 | ** block to be reallocated for data blocks if it had been deleted. | |
1093 | */ | |
1094 | static void remove_all_from_journal_list(struct super_block *p_s_sb, struct reiserfs_journal_list *jl, int debug) { | |
1095 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
1096 | struct reiserfs_journal_cnode *cn, *last ; | |
1097 | cn = jl->j_realblock ; | |
1098 | ||
1099 | /* which is better, to lock once around the whole loop, or | |
1100 | ** to lock for each call to remove_journal_hash? | |
1101 | */ | |
1102 | while(cn) { | |
1103 | if (cn->blocknr != 0) { | |
1104 | if (debug) { | |
1105 | reiserfs_warning (p_s_sb, "block %u, bh is %d, state %ld", cn->blocknr, | |
1106 | cn->bh ? 1: 0, cn->state) ; | |
1107 | } | |
1108 | cn->state = 0 ; | |
1109 | remove_journal_hash(p_s_sb, journal->j_list_hash_table, jl, cn->blocknr, 1) ; | |
1110 | } | |
1111 | last = cn ; | |
1112 | cn = cn->next ; | |
1113 | free_cnode(p_s_sb, last) ; | |
1114 | } | |
1115 | jl->j_realblock = NULL ; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. | |
1120 | ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start | |
1121 | ** releasing blocks in this transaction for reuse as data blocks. | |
1122 | ** called by flush_journal_list, before it calls remove_all_from_journal_list | |
1123 | ** | |
1124 | */ | |
1125 | static int _update_journal_header_block(struct super_block *p_s_sb, unsigned long offset, unsigned long trans_id) { | |
1126 | struct reiserfs_journal_header *jh ; | |
1127 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
1128 | ||
1129 | if (reiserfs_is_journal_aborted (journal)) | |
1130 | return -EIO; | |
1131 | ||
1132 | if (trans_id >= journal->j_last_flush_trans_id) { | |
1133 | if (buffer_locked((journal->j_header_bh))) { | |
1134 | wait_on_buffer((journal->j_header_bh)) ; | |
1135 | if (unlikely (!buffer_uptodate(journal->j_header_bh))) { | |
1136 | #ifdef CONFIG_REISERFS_CHECK | |
1137 | reiserfs_warning (p_s_sb, "journal-699: buffer write failed") ; | |
1138 | #endif | |
1139 | return -EIO; | |
1140 | } | |
1141 | } | |
1142 | journal->j_last_flush_trans_id = trans_id ; | |
1143 | journal->j_first_unflushed_offset = offset ; | |
1144 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data) ; | |
1145 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id) ; | |
1146 | jh->j_first_unflushed_offset = cpu_to_le32(offset) ; | |
1147 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id) ; | |
1148 | ||
1149 | if (reiserfs_barrier_flush(p_s_sb)) { | |
1150 | int ret; | |
1151 | lock_buffer(journal->j_header_bh); | |
1152 | ret = submit_barrier_buffer(journal->j_header_bh); | |
1153 | if (ret == -EOPNOTSUPP) { | |
1154 | set_buffer_uptodate(journal->j_header_bh); | |
1155 | disable_barrier(p_s_sb); | |
1156 | goto sync; | |
1157 | } | |
1158 | wait_on_buffer(journal->j_header_bh); | |
1159 | check_barrier_completion(p_s_sb, journal->j_header_bh); | |
1160 | } else { | |
1161 | sync: | |
1162 | set_buffer_dirty(journal->j_header_bh) ; | |
1163 | sync_dirty_buffer(journal->j_header_bh) ; | |
1164 | } | |
1165 | if (!buffer_uptodate(journal->j_header_bh)) { | |
1166 | reiserfs_warning (p_s_sb, "journal-837: IO error during journal replay"); | |
1167 | return -EIO ; | |
1168 | } | |
1169 | } | |
1170 | return 0 ; | |
1171 | } | |
1172 | ||
1173 | static int update_journal_header_block(struct super_block *p_s_sb, | |
1174 | unsigned long offset, | |
1175 | unsigned long trans_id) { | |
1176 | return _update_journal_header_block(p_s_sb, offset, trans_id); | |
1177 | } | |
1178 | /* | |
1179 | ** flush any and all journal lists older than you are | |
1180 | ** can only be called from flush_journal_list | |
1181 | */ | |
1182 | static int flush_older_journal_lists(struct super_block *p_s_sb, | |
1183 | struct reiserfs_journal_list *jl) | |
1184 | { | |
1185 | struct list_head *entry; | |
1186 | struct reiserfs_journal_list *other_jl ; | |
1187 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
1188 | unsigned long trans_id = jl->j_trans_id; | |
1189 | ||
1190 | /* we know we are the only ones flushing things, no extra race | |
1191 | * protection is required. | |
1192 | */ | |
1193 | restart: | |
1194 | entry = journal->j_journal_list.next; | |
1195 | /* Did we wrap? */ | |
1196 | if (entry == &journal->j_journal_list) | |
1197 | return 0; | |
1198 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
1199 | if (other_jl->j_trans_id < trans_id) { | |
1200 | BUG_ON (other_jl->j_refcount <= 0); | |
1201 | /* do not flush all */ | |
1202 | flush_journal_list(p_s_sb, other_jl, 0) ; | |
1203 | ||
1204 | /* other_jl is now deleted from the list */ | |
1205 | goto restart; | |
1206 | } | |
1207 | return 0 ; | |
1208 | } | |
1209 | ||
1210 | static void del_from_work_list(struct super_block *s, | |
1211 | struct reiserfs_journal_list *jl) { | |
1212 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
1213 | if (!list_empty(&jl->j_working_list)) { | |
1214 | list_del_init(&jl->j_working_list); | |
1215 | journal->j_num_work_lists--; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | /* flush a journal list, both commit and real blocks | |
1220 | ** | |
1221 | ** always set flushall to 1, unless you are calling from inside | |
1222 | ** flush_journal_list | |
1223 | ** | |
1224 | ** IMPORTANT. This can only be called while there are no journal writers, | |
1225 | ** and the journal is locked. That means it can only be called from | |
1226 | ** do_journal_end, or by journal_release | |
1227 | */ | |
1228 | static int flush_journal_list(struct super_block *s, | |
1229 | struct reiserfs_journal_list *jl, int flushall) { | |
1230 | struct reiserfs_journal_list *pjl ; | |
1231 | struct reiserfs_journal_cnode *cn, *last ; | |
1232 | int count ; | |
1233 | int was_jwait = 0 ; | |
1234 | int was_dirty = 0 ; | |
1235 | struct buffer_head *saved_bh ; | |
1236 | unsigned long j_len_saved = jl->j_len ; | |
1237 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
1238 | int err = 0; | |
1239 | ||
1240 | BUG_ON (j_len_saved <= 0); | |
1241 | ||
1242 | if (atomic_read(&journal->j_wcount) != 0) { | |
1243 | reiserfs_warning(s, "clm-2048: flush_journal_list called with wcount %d", | |
1244 | atomic_read(&journal->j_wcount)) ; | |
1245 | } | |
1246 | BUG_ON (jl->j_trans_id == 0); | |
1247 | ||
1248 | /* if flushall == 0, the lock is already held */ | |
1249 | if (flushall) { | |
1250 | down(&journal->j_flush_sem); | |
1251 | } else if (!down_trylock(&journal->j_flush_sem)) { | |
1252 | BUG(); | |
1253 | } | |
1254 | ||
1255 | count = 0 ; | |
1256 | if (j_len_saved > journal->j_trans_max) { | |
1257 | reiserfs_panic(s, "journal-715: flush_journal_list, length is %lu, trans id %lu\n", j_len_saved, jl->j_trans_id); | |
1258 | return 0 ; | |
1259 | } | |
1260 | ||
22e2c507 JA |
1261 | get_fs_excl(); |
1262 | ||
1da177e4 LT |
1263 | /* if all the work is already done, get out of here */ |
1264 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1265 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1266 | goto flush_older_and_return ; | |
1267 | } | |
1268 | ||
1269 | /* start by putting the commit list on disk. This will also flush | |
1270 | ** the commit lists of any olders transactions | |
1271 | */ | |
1272 | flush_commit_list(s, jl, 1) ; | |
1273 | ||
1274 | if (!(jl->j_state & LIST_DIRTY) && !reiserfs_is_journal_aborted (journal)) | |
1275 | BUG(); | |
1276 | ||
1277 | /* are we done now? */ | |
1278 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1279 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1280 | goto flush_older_and_return ; | |
1281 | } | |
1282 | ||
1283 | /* loop through each cnode, see if we need to write it, | |
1284 | ** or wait on a more recent transaction, or just ignore it | |
1285 | */ | |
1286 | if (atomic_read(&(journal->j_wcount)) != 0) { | |
1287 | reiserfs_panic(s, "journal-844: panic journal list is flushing, wcount is not 0\n") ; | |
1288 | } | |
1289 | cn = jl->j_realblock ; | |
1290 | while(cn) { | |
1291 | was_jwait = 0 ; | |
1292 | was_dirty = 0 ; | |
1293 | saved_bh = NULL ; | |
1294 | /* blocknr of 0 is no longer in the hash, ignore it */ | |
1295 | if (cn->blocknr == 0) { | |
1296 | goto free_cnode ; | |
1297 | } | |
1298 | ||
1299 | /* This transaction failed commit. Don't write out to the disk */ | |
1300 | if (!(jl->j_state & LIST_DIRTY)) | |
1301 | goto free_cnode; | |
1302 | ||
1303 | pjl = find_newer_jl_for_cn(cn) ; | |
1304 | /* the order is important here. We check pjl to make sure we | |
1305 | ** don't clear BH_JDirty_wait if we aren't the one writing this | |
1306 | ** block to disk | |
1307 | */ | |
1308 | if (!pjl && cn->bh) { | |
1309 | saved_bh = cn->bh ; | |
1310 | ||
1311 | /* we do this to make sure nobody releases the buffer while | |
1312 | ** we are working with it | |
1313 | */ | |
1314 | get_bh(saved_bh) ; | |
1315 | ||
1316 | if (buffer_journal_dirty(saved_bh)) { | |
1317 | BUG_ON (!can_dirty (cn)); | |
1318 | was_jwait = 1 ; | |
1319 | was_dirty = 1 ; | |
1320 | } else if (can_dirty(cn)) { | |
1321 | /* everything with !pjl && jwait should be writable */ | |
1322 | BUG(); | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | /* if someone has this block in a newer transaction, just make | |
1327 | ** sure they are commited, and don't try writing it to disk | |
1328 | */ | |
1329 | if (pjl) { | |
1330 | if (atomic_read(&pjl->j_commit_left)) | |
1331 | flush_commit_list(s, pjl, 1) ; | |
1332 | goto free_cnode ; | |
1333 | } | |
1334 | ||
1335 | /* bh == NULL when the block got to disk on its own, OR, | |
1336 | ** the block got freed in a future transaction | |
1337 | */ | |
1338 | if (saved_bh == NULL) { | |
1339 | goto free_cnode ; | |
1340 | } | |
1341 | ||
1342 | /* this should never happen. kupdate_one_transaction has this list | |
1343 | ** locked while it works, so we should never see a buffer here that | |
1344 | ** is not marked JDirty_wait | |
1345 | */ | |
1346 | if ((!was_jwait) && !buffer_locked(saved_bh)) { | |
1347 | reiserfs_warning (s, "journal-813: BAD! buffer %llu %cdirty %cjwait, " | |
1348 | "not in a newer tranasction", | |
1349 | (unsigned long long)saved_bh->b_blocknr, | |
1350 | was_dirty ? ' ' : '!', was_jwait ? ' ' : '!') ; | |
1351 | } | |
1352 | if (was_dirty) { | |
1353 | /* we inc again because saved_bh gets decremented at free_cnode */ | |
1354 | get_bh(saved_bh) ; | |
1355 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state) ; | |
1356 | lock_buffer(saved_bh); | |
1357 | BUG_ON (cn->blocknr != saved_bh->b_blocknr); | |
1358 | if (buffer_dirty(saved_bh)) | |
1359 | submit_logged_buffer(saved_bh) ; | |
1360 | else | |
1361 | unlock_buffer(saved_bh); | |
1362 | count++ ; | |
1363 | } else { | |
1364 | reiserfs_warning (s, "clm-2082: Unable to flush buffer %llu in %s", | |
1365 | (unsigned long long)saved_bh->b_blocknr, __FUNCTION__); | |
1366 | } | |
1367 | free_cnode: | |
1368 | last = cn ; | |
1369 | cn = cn->next ; | |
1370 | if (saved_bh) { | |
1371 | /* we incremented this to keep others from taking the buffer head away */ | |
1372 | put_bh(saved_bh) ; | |
1373 | if (atomic_read(&(saved_bh->b_count)) < 0) { | |
1374 | reiserfs_warning (s, "journal-945: saved_bh->b_count < 0"); | |
1375 | } | |
1376 | } | |
1377 | } | |
1378 | if (count > 0) { | |
1379 | cn = jl->j_realblock ; | |
1380 | while(cn) { | |
1381 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { | |
1382 | if (!cn->bh) { | |
1383 | reiserfs_panic(s, "journal-1011: cn->bh is NULL\n") ; | |
1384 | } | |
1385 | wait_on_buffer(cn->bh) ; | |
1386 | if (!cn->bh) { | |
1387 | reiserfs_panic(s, "journal-1012: cn->bh is NULL\n") ; | |
1388 | } | |
1389 | if (unlikely (!buffer_uptodate(cn->bh))) { | |
1390 | #ifdef CONFIG_REISERFS_CHECK | |
1391 | reiserfs_warning(s, "journal-949: buffer write failed\n") ; | |
1392 | #endif | |
1393 | err = -EIO; | |
1394 | } | |
1395 | /* note, we must clear the JDirty_wait bit after the up to date | |
1396 | ** check, otherwise we race against our flushpage routine | |
1397 | */ | |
1398 | BUG_ON (!test_clear_buffer_journal_dirty (cn->bh)); | |
1399 | ||
1400 | /* undo the inc from journal_mark_dirty */ | |
1401 | put_bh(cn->bh) ; | |
1402 | brelse(cn->bh) ; | |
1403 | } | |
1404 | cn = cn->next ; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | if (err) | |
1409 | reiserfs_abort (s, -EIO, "Write error while pushing transaction to disk in %s", __FUNCTION__); | |
1410 | flush_older_and_return: | |
1411 | ||
1412 | ||
1413 | /* before we can update the journal header block, we _must_ flush all | |
1414 | ** real blocks from all older transactions to disk. This is because | |
1415 | ** once the header block is updated, this transaction will not be | |
1416 | ** replayed after a crash | |
1417 | */ | |
1418 | if (flushall) { | |
1419 | flush_older_journal_lists(s, jl); | |
1420 | } | |
1421 | ||
1422 | err = journal->j_errno; | |
1423 | /* before we can remove everything from the hash tables for this | |
1424 | ** transaction, we must make sure it can never be replayed | |
1425 | ** | |
1426 | ** since we are only called from do_journal_end, we know for sure there | |
1427 | ** are no allocations going on while we are flushing journal lists. So, | |
1428 | ** we only need to update the journal header block for the last list | |
1429 | ** being flushed | |
1430 | */ | |
1431 | if (!err && flushall) { | |
1432 | err = update_journal_header_block(s, (jl->j_start + jl->j_len + 2) % SB_ONDISK_JOURNAL_SIZE(s), jl->j_trans_id) ; | |
1433 | if (err) | |
1434 | reiserfs_abort (s, -EIO, "Write error while updating journal header in %s", __FUNCTION__); | |
1435 | } | |
1436 | remove_all_from_journal_list(s, jl, 0) ; | |
1437 | list_del_init(&jl->j_list); | |
1438 | journal->j_num_lists--; | |
1439 | del_from_work_list(s, jl); | |
1440 | ||
1441 | if (journal->j_last_flush_id != 0 && | |
1442 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { | |
1443 | reiserfs_warning(s, "clm-2201: last flush %lu, current %lu", | |
1444 | journal->j_last_flush_id, | |
1445 | jl->j_trans_id); | |
1446 | } | |
1447 | journal->j_last_flush_id = jl->j_trans_id; | |
1448 | ||
1449 | /* not strictly required since we are freeing the list, but it should | |
1450 | * help find code using dead lists later on | |
1451 | */ | |
1452 | jl->j_len = 0 ; | |
1453 | atomic_set(&(jl->j_nonzerolen), 0) ; | |
1454 | jl->j_start = 0 ; | |
1455 | jl->j_realblock = NULL ; | |
1456 | jl->j_commit_bh = NULL ; | |
1457 | jl->j_trans_id = 0 ; | |
1458 | jl->j_state = 0; | |
1459 | put_journal_list(s, jl); | |
1460 | if (flushall) | |
1461 | up(&journal->j_flush_sem); | |
22e2c507 | 1462 | put_fs_excl(); |
1da177e4 LT |
1463 | return err ; |
1464 | } | |
1465 | ||
1466 | static int write_one_transaction(struct super_block *s, | |
1467 | struct reiserfs_journal_list *jl, | |
1468 | struct buffer_chunk *chunk) | |
1469 | { | |
1470 | struct reiserfs_journal_cnode *cn; | |
1471 | int ret = 0 ; | |
1472 | ||
1473 | jl->j_state |= LIST_TOUCHED; | |
1474 | del_from_work_list(s, jl); | |
1475 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | cn = jl->j_realblock ; | |
1480 | while(cn) { | |
1481 | /* if the blocknr == 0, this has been cleared from the hash, | |
1482 | ** skip it | |
1483 | */ | |
1484 | if (cn->blocknr == 0) { | |
1485 | goto next ; | |
1486 | } | |
1487 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { | |
1488 | struct buffer_head *tmp_bh; | |
1489 | /* we can race against journal_mark_freed when we try | |
1490 | * to lock_buffer(cn->bh), so we have to inc the buffer | |
1491 | * count, and recheck things after locking | |
1492 | */ | |
1493 | tmp_bh = cn->bh; | |
1494 | get_bh(tmp_bh); | |
1495 | lock_buffer(tmp_bh); | |
1496 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { | |
1497 | if (!buffer_journal_dirty(tmp_bh) || | |
1498 | buffer_journal_prepared(tmp_bh)) | |
1499 | BUG(); | |
1500 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); | |
1501 | ret++; | |
1502 | } else { | |
1503 | /* note, cn->bh might be null now */ | |
1504 | unlock_buffer(tmp_bh); | |
1505 | } | |
1506 | put_bh(tmp_bh); | |
1507 | } | |
1508 | next: | |
1509 | cn = cn->next ; | |
1510 | cond_resched(); | |
1511 | } | |
1512 | return ret ; | |
1513 | } | |
1514 | ||
1515 | /* used by flush_commit_list */ | |
1516 | static int dirty_one_transaction(struct super_block *s, | |
1517 | struct reiserfs_journal_list *jl) | |
1518 | { | |
1519 | struct reiserfs_journal_cnode *cn; | |
1520 | struct reiserfs_journal_list *pjl; | |
1521 | int ret = 0 ; | |
1522 | ||
1523 | jl->j_state |= LIST_DIRTY; | |
1524 | cn = jl->j_realblock ; | |
1525 | while(cn) { | |
1526 | /* look for a more recent transaction that logged this | |
1527 | ** buffer. Only the most recent transaction with a buffer in | |
1528 | ** it is allowed to send that buffer to disk | |
1529 | */ | |
1530 | pjl = find_newer_jl_for_cn(cn) ; | |
1531 | if (!pjl && cn->blocknr && cn->bh && buffer_journal_dirty(cn->bh)) | |
1532 | { | |
1533 | BUG_ON (!can_dirty(cn)); | |
1534 | /* if the buffer is prepared, it will either be logged | |
1535 | * or restored. If restored, we need to make sure | |
1536 | * it actually gets marked dirty | |
1537 | */ | |
1538 | clear_buffer_journal_new (cn->bh); | |
1539 | if (buffer_journal_prepared (cn->bh)) { | |
1540 | set_buffer_journal_restore_dirty (cn->bh); | |
1541 | } else { | |
1542 | set_buffer_journal_test (cn->bh); | |
1543 | mark_buffer_dirty(cn->bh); | |
1544 | } | |
1545 | } | |
1546 | cn = cn->next ; | |
1547 | } | |
1548 | return ret ; | |
1549 | } | |
1550 | ||
1551 | static int kupdate_transactions(struct super_block *s, | |
1552 | struct reiserfs_journal_list *jl, | |
1553 | struct reiserfs_journal_list **next_jl, | |
1554 | unsigned long *next_trans_id, | |
1555 | int num_blocks, | |
1556 | int num_trans) { | |
1557 | int ret = 0; | |
1558 | int written = 0 ; | |
1559 | int transactions_flushed = 0; | |
1560 | unsigned long orig_trans_id = jl->j_trans_id; | |
1561 | struct buffer_chunk chunk; | |
1562 | struct list_head *entry; | |
1563 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
1564 | chunk.nr = 0; | |
1565 | ||
1566 | down(&journal->j_flush_sem); | |
1567 | if (!journal_list_still_alive(s, orig_trans_id)) { | |
1568 | goto done; | |
1569 | } | |
1570 | ||
1571 | /* we've got j_flush_sem held, nobody is going to delete any | |
1572 | * of these lists out from underneath us | |
1573 | */ | |
1574 | while((num_trans && transactions_flushed < num_trans) || | |
1575 | (!num_trans && written < num_blocks)) { | |
1576 | ||
1577 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || | |
1578 | atomic_read(&jl->j_commit_left) || !(jl->j_state & LIST_DIRTY)) | |
1579 | { | |
1580 | del_from_work_list(s, jl); | |
1581 | break; | |
1582 | } | |
1583 | ret = write_one_transaction(s, jl, &chunk); | |
1584 | ||
1585 | if (ret < 0) | |
1586 | goto done; | |
1587 | transactions_flushed++; | |
1588 | written += ret; | |
1589 | entry = jl->j_list.next; | |
1590 | ||
1591 | /* did we wrap? */ | |
1592 | if (entry == &journal->j_journal_list) { | |
1593 | break; | |
1594 | } | |
1595 | jl = JOURNAL_LIST_ENTRY(entry); | |
1596 | ||
1597 | /* don't bother with older transactions */ | |
1598 | if (jl->j_trans_id <= orig_trans_id) | |
1599 | break; | |
1600 | } | |
1601 | if (chunk.nr) { | |
1602 | write_chunk(&chunk); | |
1603 | } | |
1604 | ||
1605 | done: | |
1606 | up(&journal->j_flush_sem); | |
1607 | return ret; | |
1608 | } | |
1609 | ||
1610 | /* for o_sync and fsync heavy applications, they tend to use | |
1611 | ** all the journa list slots with tiny transactions. These | |
1612 | ** trigger lots and lots of calls to update the header block, which | |
1613 | ** adds seeks and slows things down. | |
1614 | ** | |
1615 | ** This function tries to clear out a large chunk of the journal lists | |
1616 | ** at once, which makes everything faster since only the newest journal | |
1617 | ** list updates the header block | |
1618 | */ | |
1619 | static int flush_used_journal_lists(struct super_block *s, | |
1620 | struct reiserfs_journal_list *jl) { | |
1621 | unsigned long len = 0; | |
1622 | unsigned long cur_len; | |
1623 | int ret; | |
1624 | int i; | |
1625 | int limit = 256; | |
1626 | struct reiserfs_journal_list *tjl; | |
1627 | struct reiserfs_journal_list *flush_jl; | |
1628 | unsigned long trans_id; | |
1629 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
1630 | ||
1631 | flush_jl = tjl = jl; | |
1632 | ||
1633 | /* in data logging mode, try harder to flush a lot of blocks */ | |
1634 | if (reiserfs_data_log(s)) | |
1635 | limit = 1024; | |
1636 | /* flush for 256 transactions or limit blocks, whichever comes first */ | |
1637 | for(i = 0 ; i < 256 && len < limit ; i++) { | |
1638 | if (atomic_read(&tjl->j_commit_left) || | |
1639 | tjl->j_trans_id < jl->j_trans_id) { | |
1640 | break; | |
1641 | } | |
1642 | cur_len = atomic_read(&tjl->j_nonzerolen); | |
1643 | if (cur_len > 0) { | |
1644 | tjl->j_state &= ~LIST_TOUCHED; | |
1645 | } | |
1646 | len += cur_len; | |
1647 | flush_jl = tjl; | |
1648 | if (tjl->j_list.next == &journal->j_journal_list) | |
1649 | break; | |
1650 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); | |
1651 | } | |
1652 | /* try to find a group of blocks we can flush across all the | |
1653 | ** transactions, but only bother if we've actually spanned | |
1654 | ** across multiple lists | |
1655 | */ | |
1656 | if (flush_jl != jl) { | |
1657 | ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); | |
1658 | } | |
1659 | flush_journal_list(s, flush_jl, 1); | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | ** removes any nodes in table with name block and dev as bh. | |
1665 | ** only touchs the hnext and hprev pointers. | |
1666 | */ | |
1667 | void remove_journal_hash(struct super_block *sb, | |
1668 | struct reiserfs_journal_cnode **table, | |
1669 | struct reiserfs_journal_list *jl, | |
1670 | unsigned long block, int remove_freed) | |
1671 | { | |
1672 | struct reiserfs_journal_cnode *cur ; | |
1673 | struct reiserfs_journal_cnode **head ; | |
1674 | ||
1675 | head= &(journal_hash(table, sb, block)) ; | |
1676 | if (!head) { | |
1677 | return ; | |
1678 | } | |
1679 | cur = *head ; | |
1680 | while(cur) { | |
1681 | if (cur->blocknr == block && cur->sb == sb && (jl == NULL || jl == cur->jlist) && | |
1682 | (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { | |
1683 | if (cur->hnext) { | |
1684 | cur->hnext->hprev = cur->hprev ; | |
1685 | } | |
1686 | if (cur->hprev) { | |
1687 | cur->hprev->hnext = cur->hnext ; | |
1688 | } else { | |
1689 | *head = cur->hnext ; | |
1690 | } | |
1691 | cur->blocknr = 0 ; | |
1692 | cur->sb = NULL ; | |
1693 | cur->state = 0 ; | |
1694 | if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ | |
1695 | atomic_dec(&(cur->jlist->j_nonzerolen)) ; | |
1696 | cur->bh = NULL ; | |
1697 | cur->jlist = NULL ; | |
1698 | } | |
1699 | cur = cur->hnext ; | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | static void free_journal_ram(struct super_block *p_s_sb) { | |
1704 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); | |
1705 | reiserfs_kfree(journal->j_current_jl, | |
1706 | sizeof(struct reiserfs_journal_list), p_s_sb); | |
1707 | journal->j_num_lists--; | |
1708 | ||
1709 | vfree(journal->j_cnode_free_orig) ; | |
1710 | free_list_bitmaps(p_s_sb, journal->j_list_bitmap) ; | |
1711 | free_bitmap_nodes(p_s_sb) ; /* must be after free_list_bitmaps */ | |
1712 | if (journal->j_header_bh) { | |
1713 | brelse(journal->j_header_bh) ; | |
1714 | } | |
1715 | /* j_header_bh is on the journal dev, make sure not to release the journal | |
1716 | * dev until we brelse j_header_bh | |
1717 | */ | |
1718 | release_journal_dev(p_s_sb, journal); | |
1719 | vfree(journal) ; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | ** call on unmount. Only set error to 1 if you haven't made your way out | |
1724 | ** of read_super() yet. Any other caller must keep error at 0. | |
1725 | */ | |
1726 | static int do_journal_release(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, int error) { | |
1727 | struct reiserfs_transaction_handle myth ; | |
1728 | int flushed = 0; | |
1729 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); | |
1730 | ||
1731 | /* we only want to flush out transactions if we were called with error == 0 | |
1732 | */ | |
1733 | if (!error && !(p_s_sb->s_flags & MS_RDONLY)) { | |
1734 | /* end the current trans */ | |
1735 | BUG_ON (!th->t_trans_id); | |
1736 | do_journal_end(th, p_s_sb,10, FLUSH_ALL) ; | |
1737 | ||
1738 | /* make sure something gets logged to force our way into the flush code */ | |
1739 | if (!journal_join(&myth, p_s_sb, 1)) { | |
1740 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; | |
1741 | journal_mark_dirty(&myth, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; | |
1742 | do_journal_end(&myth, p_s_sb,1, FLUSH_ALL) ; | |
1743 | flushed = 1; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | /* this also catches errors during the do_journal_end above */ | |
1748 | if (!error && reiserfs_is_journal_aborted(journal)) { | |
1749 | memset(&myth, 0, sizeof(myth)); | |
1750 | if (!journal_join_abort(&myth, p_s_sb, 1)) { | |
1751 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; | |
1752 | journal_mark_dirty(&myth, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; | |
1753 | do_journal_end(&myth, p_s_sb, 1, FLUSH_ALL) ; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | reiserfs_mounted_fs_count-- ; | |
1758 | /* wait for all commits to finish */ | |
1759 | cancel_delayed_work(&SB_JOURNAL(p_s_sb)->j_work); | |
1760 | flush_workqueue(commit_wq); | |
1761 | if (!reiserfs_mounted_fs_count) { | |
1762 | destroy_workqueue(commit_wq); | |
1763 | commit_wq = NULL; | |
1764 | } | |
1765 | ||
1766 | free_journal_ram(p_s_sb) ; | |
1767 | ||
1768 | return 0 ; | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | ** call on unmount. flush all journal trans, release all alloc'd ram | |
1773 | */ | |
1774 | int journal_release(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb) { | |
1775 | return do_journal_release(th, p_s_sb, 0) ; | |
1776 | } | |
1777 | /* | |
1778 | ** only call from an error condition inside reiserfs_read_super! | |
1779 | */ | |
1780 | int journal_release_error(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb) { | |
1781 | return do_journal_release(th, p_s_sb, 1) ; | |
1782 | } | |
1783 | ||
1784 | /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ | |
1785 | static int journal_compare_desc_commit(struct super_block *p_s_sb, struct reiserfs_journal_desc *desc, | |
1786 | struct reiserfs_journal_commit *commit) { | |
1787 | if (get_commit_trans_id (commit) != get_desc_trans_id (desc) || | |
1788 | get_commit_trans_len (commit) != get_desc_trans_len (desc) || | |
1789 | get_commit_trans_len (commit) > SB_JOURNAL(p_s_sb)->j_trans_max || | |
1790 | get_commit_trans_len (commit) <= 0 | |
1791 | ) { | |
1792 | return 1 ; | |
1793 | } | |
1794 | return 0 ; | |
1795 | } | |
1796 | /* returns 0 if it did not find a description block | |
1797 | ** returns -1 if it found a corrupt commit block | |
1798 | ** returns 1 if both desc and commit were valid | |
1799 | */ | |
1800 | static int journal_transaction_is_valid(struct super_block *p_s_sb, struct buffer_head *d_bh, unsigned long *oldest_invalid_trans_id, unsigned long *newest_mount_id) { | |
1801 | struct reiserfs_journal_desc *desc ; | |
1802 | struct reiserfs_journal_commit *commit ; | |
1803 | struct buffer_head *c_bh ; | |
1804 | unsigned long offset ; | |
1805 | ||
1806 | if (!d_bh) | |
1807 | return 0 ; | |
1808 | ||
1809 | desc = (struct reiserfs_journal_desc *)d_bh->b_data ; | |
1810 | if (get_desc_trans_len(desc) > 0 && !memcmp(get_journal_desc_magic (d_bh), JOURNAL_DESC_MAGIC, 8)) { | |
1811 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { | |
1812 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-986: transaction " | |
1813 | "is valid returning because trans_id %d is greater than " | |
1814 | "oldest_invalid %lu", get_desc_trans_id(desc), | |
1815 | *oldest_invalid_trans_id); | |
1816 | return 0 ; | |
1817 | } | |
1818 | if (newest_mount_id && *newest_mount_id > get_desc_mount_id (desc)) { | |
1819 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1087: transaction " | |
1820 | "is valid returning because mount_id %d is less than " | |
1821 | "newest_mount_id %lu", get_desc_mount_id (desc), | |
1822 | *newest_mount_id) ; | |
1823 | return -1 ; | |
1824 | } | |
1825 | if ( get_desc_trans_len(desc) > SB_JOURNAL(p_s_sb)->j_trans_max ) { | |
1826 | reiserfs_warning(p_s_sb, "journal-2018: Bad transaction length %d encountered, ignoring transaction", get_desc_trans_len(desc)); | |
1827 | return -1 ; | |
1828 | } | |
1829 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; | |
1830 | ||
1831 | /* ok, we have a journal description block, lets see if the transaction was valid */ | |
1832 | c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + | |
1833 | ((offset + get_desc_trans_len(desc) + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; | |
1834 | if (!c_bh) | |
1835 | return 0 ; | |
1836 | commit = (struct reiserfs_journal_commit *)c_bh->b_data ; | |
1837 | if (journal_compare_desc_commit(p_s_sb, desc, commit)) { | |
1838 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, | |
1839 | "journal_transaction_is_valid, commit offset %ld had bad " | |
1840 | "time %d or length %d", | |
1841 | c_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
1842 | get_commit_trans_id (commit), | |
1843 | get_commit_trans_len(commit)); | |
1844 | brelse(c_bh) ; | |
1845 | if (oldest_invalid_trans_id) { | |
1846 | *oldest_invalid_trans_id = get_desc_trans_id(desc) ; | |
1847 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1004: " | |
1848 | "transaction_is_valid setting oldest invalid trans_id " | |
1849 | "to %d", get_desc_trans_id(desc)) ; | |
1850 | } | |
1851 | return -1; | |
1852 | } | |
1853 | brelse(c_bh) ; | |
1854 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1006: found valid " | |
1855 | "transaction start offset %llu, len %d id %d", | |
1856 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
1857 | get_desc_trans_len(desc), get_desc_trans_id(desc)) ; | |
1858 | return 1 ; | |
1859 | } else { | |
1860 | return 0 ; | |
1861 | } | |
1862 | } | |
1863 | ||
1864 | static void brelse_array(struct buffer_head **heads, int num) { | |
1865 | int i ; | |
1866 | for (i = 0 ; i < num ; i++) { | |
1867 | brelse(heads[i]) ; | |
1868 | } | |
1869 | } | |
1870 | ||
1871 | /* | |
1872 | ** given the start, and values for the oldest acceptable transactions, | |
1873 | ** this either reads in a replays a transaction, or returns because the transaction | |
1874 | ** is invalid, or too old. | |
1875 | */ | |
1876 | static int journal_read_transaction(struct super_block *p_s_sb, unsigned long cur_dblock, unsigned long oldest_start, | |
1877 | unsigned long oldest_trans_id, unsigned long newest_mount_id) { | |
1878 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
1879 | struct reiserfs_journal_desc *desc ; | |
1880 | struct reiserfs_journal_commit *commit ; | |
1881 | unsigned long trans_id = 0 ; | |
1882 | struct buffer_head *c_bh ; | |
1883 | struct buffer_head *d_bh ; | |
1884 | struct buffer_head **log_blocks = NULL ; | |
1885 | struct buffer_head **real_blocks = NULL ; | |
1886 | unsigned long trans_offset ; | |
1887 | int i; | |
1888 | int trans_half; | |
1889 | ||
1890 | d_bh = journal_bread(p_s_sb, cur_dblock) ; | |
1891 | if (!d_bh) | |
1892 | return 1 ; | |
1893 | desc = (struct reiserfs_journal_desc *)d_bh->b_data ; | |
1894 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; | |
1895 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1037: " | |
1896 | "journal_read_transaction, offset %llu, len %d mount_id %d", | |
1897 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
1898 | get_desc_trans_len(desc), get_desc_mount_id(desc)) ; | |
1899 | if (get_desc_trans_id(desc) < oldest_trans_id) { | |
1900 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1039: " | |
1901 | "journal_read_trans skipping because %lu is too old", | |
1902 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)) ; | |
1903 | brelse(d_bh) ; | |
1904 | return 1 ; | |
1905 | } | |
1906 | if (get_desc_mount_id(desc) != newest_mount_id) { | |
1907 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1146: " | |
1908 | "journal_read_trans skipping because %d is != " | |
1909 | "newest_mount_id %lu", get_desc_mount_id(desc), | |
1910 | newest_mount_id) ; | |
1911 | brelse(d_bh) ; | |
1912 | return 1 ; | |
1913 | } | |
1914 | c_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + | |
1915 | ((trans_offset + get_desc_trans_len(desc) + 1) % | |
1916 | SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; | |
1917 | if (!c_bh) { | |
1918 | brelse(d_bh) ; | |
1919 | return 1 ; | |
1920 | } | |
1921 | commit = (struct reiserfs_journal_commit *)c_bh->b_data ; | |
1922 | if (journal_compare_desc_commit(p_s_sb, desc, commit)) { | |
1923 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal_read_transaction, " | |
1924 | "commit offset %llu had bad time %d or length %d", | |
1925 | c_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
1926 | get_commit_trans_id(commit), get_commit_trans_len(commit)); | |
1927 | brelse(c_bh) ; | |
1928 | brelse(d_bh) ; | |
1929 | return 1; | |
1930 | } | |
1931 | trans_id = get_desc_trans_id(desc) ; | |
1932 | /* now we know we've got a good transaction, and it was inside the valid time ranges */ | |
1933 | log_blocks = reiserfs_kmalloc(get_desc_trans_len(desc) * sizeof(struct buffer_head *), GFP_NOFS, p_s_sb) ; | |
1934 | real_blocks = reiserfs_kmalloc(get_desc_trans_len(desc) * sizeof(struct buffer_head *), GFP_NOFS, p_s_sb) ; | |
1935 | if (!log_blocks || !real_blocks) { | |
1936 | brelse(c_bh) ; | |
1937 | brelse(d_bh) ; | |
1938 | reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
1939 | reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
1940 | reiserfs_warning(p_s_sb, "journal-1169: kmalloc failed, unable to mount FS") ; | |
1941 | return -1 ; | |
1942 | } | |
1943 | /* get all the buffer heads */ | |
1944 | trans_half = journal_trans_half (p_s_sb->s_blocksize) ; | |
1945 | for(i = 0 ; i < get_desc_trans_len(desc) ; i++) { | |
1946 | log_blocks[i] = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + (trans_offset + 1 + i) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)); | |
1947 | if (i < trans_half) { | |
1948 | real_blocks[i] = sb_getblk(p_s_sb, le32_to_cpu(desc->j_realblock[i])) ; | |
1949 | } else { | |
1950 | real_blocks[i] = sb_getblk(p_s_sb, le32_to_cpu(commit->j_realblock[i - trans_half])) ; | |
1951 | } | |
1952 | if ( real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(p_s_sb) ) { | |
1953 | reiserfs_warning(p_s_sb, "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem"); | |
1954 | goto abort_replay; | |
1955 | } | |
1956 | /* make sure we don't try to replay onto log or reserved area */ | |
1957 | if (is_block_in_log_or_reserved_area(p_s_sb, real_blocks[i]->b_blocknr)) { | |
1958 | reiserfs_warning(p_s_sb, "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block") ; | |
1959 | abort_replay: | |
1960 | brelse_array(log_blocks, i) ; | |
1961 | brelse_array(real_blocks, i) ; | |
1962 | brelse(c_bh) ; | |
1963 | brelse(d_bh) ; | |
1964 | reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
1965 | reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
1966 | return -1 ; | |
1967 | } | |
1968 | } | |
1969 | /* read in the log blocks, memcpy to the corresponding real block */ | |
1970 | ll_rw_block(READ, get_desc_trans_len(desc), log_blocks) ; | |
1971 | for (i = 0 ; i < get_desc_trans_len(desc) ; i++) { | |
1972 | wait_on_buffer(log_blocks[i]) ; | |
1973 | if (!buffer_uptodate(log_blocks[i])) { | |
1974 | reiserfs_warning(p_s_sb, "journal-1212: REPLAY FAILURE fsck required! buffer write failed") ; | |
1975 | brelse_array(log_blocks + i, get_desc_trans_len(desc) - i) ; | |
1976 | brelse_array(real_blocks, get_desc_trans_len(desc)) ; | |
1977 | brelse(c_bh) ; | |
1978 | brelse(d_bh) ; | |
1979 | reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
1980 | reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
1981 | return -1 ; | |
1982 | } | |
1983 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, real_blocks[i]->b_size) ; | |
1984 | set_buffer_uptodate(real_blocks[i]) ; | |
1985 | brelse(log_blocks[i]) ; | |
1986 | } | |
1987 | /* flush out the real blocks */ | |
1988 | for (i = 0 ; i < get_desc_trans_len(desc) ; i++) { | |
1989 | set_buffer_dirty(real_blocks[i]) ; | |
1990 | ll_rw_block(WRITE, 1, real_blocks + i) ; | |
1991 | } | |
1992 | for (i = 0 ; i < get_desc_trans_len(desc) ; i++) { | |
1993 | wait_on_buffer(real_blocks[i]) ; | |
1994 | if (!buffer_uptodate(real_blocks[i])) { | |
1995 | reiserfs_warning(p_s_sb, "journal-1226: REPLAY FAILURE, fsck required! buffer write failed") ; | |
1996 | brelse_array(real_blocks + i, get_desc_trans_len(desc) - i) ; | |
1997 | brelse(c_bh) ; | |
1998 | brelse(d_bh) ; | |
1999 | reiserfs_kfree(log_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
2000 | reiserfs_kfree(real_blocks, get_desc_trans_len(desc) * sizeof(struct buffer_head *), p_s_sb) ; | |
2001 | return -1 ; | |
2002 | } | |
2003 | brelse(real_blocks[i]) ; | |
2004 | } | |
2005 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + ((trans_offset + get_desc_trans_len(desc) + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb)) ; | |
2006 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1095: setting journal " | |
2007 | "start to offset %ld", | |
2008 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb)) ; | |
2009 | ||
2010 | /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ | |
2011 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; | |
2012 | journal->j_last_flush_trans_id = trans_id ; | |
2013 | journal->j_trans_id = trans_id + 1; | |
2014 | brelse(c_bh) ; | |
2015 | brelse(d_bh) ; | |
2016 | reiserfs_kfree(log_blocks, le32_to_cpu(desc->j_len) * sizeof(struct buffer_head *), p_s_sb) ; | |
2017 | reiserfs_kfree(real_blocks, le32_to_cpu(desc->j_len) * sizeof(struct buffer_head *), p_s_sb) ; | |
2018 | return 0 ; | |
2019 | } | |
2020 | ||
2021 | /* This function reads blocks starting from block and to max_block of bufsize | |
2022 | size (but no more than BUFNR blocks at a time). This proved to improve | |
2023 | mounting speed on self-rebuilding raid5 arrays at least. | |
2024 | Right now it is only used from journal code. But later we might use it | |
2025 | from other places. | |
2026 | Note: Do not use journal_getblk/sb_getblk functions here! */ | |
2027 | static struct buffer_head * reiserfs_breada (struct block_device *dev, int block, int bufsize, | |
2028 | unsigned int max_block) | |
2029 | { | |
2030 | struct buffer_head * bhlist[BUFNR]; | |
2031 | unsigned int blocks = BUFNR; | |
2032 | struct buffer_head * bh; | |
2033 | int i, j; | |
2034 | ||
2035 | bh = __getblk (dev, block, bufsize ); | |
2036 | if (buffer_uptodate (bh)) | |
2037 | return (bh); | |
2038 | ||
2039 | if (block + BUFNR > max_block) { | |
2040 | blocks = max_block - block; | |
2041 | } | |
2042 | bhlist[0] = bh; | |
2043 | j = 1; | |
2044 | for (i = 1; i < blocks; i++) { | |
2045 | bh = __getblk (dev, block + i, bufsize); | |
2046 | if (buffer_uptodate (bh)) { | |
2047 | brelse (bh); | |
2048 | break; | |
2049 | } | |
2050 | else bhlist[j++] = bh; | |
2051 | } | |
2052 | ll_rw_block (READ, j, bhlist); | |
2053 | for(i = 1; i < j; i++) | |
2054 | brelse (bhlist[i]); | |
2055 | bh = bhlist[0]; | |
2056 | wait_on_buffer (bh); | |
2057 | if (buffer_uptodate (bh)) | |
2058 | return bh; | |
2059 | brelse (bh); | |
2060 | return NULL; | |
2061 | } | |
2062 | ||
2063 | /* | |
2064 | ** read and replay the log | |
2065 | ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid | |
2066 | ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. | |
2067 | ** | |
2068 | ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. | |
2069 | ** | |
2070 | ** On exit, it sets things up so the first transaction will work correctly. | |
2071 | */ | |
2072 | static int journal_read(struct super_block *p_s_sb) { | |
2073 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
2074 | struct reiserfs_journal_desc *desc ; | |
2075 | unsigned long oldest_trans_id = 0; | |
2076 | unsigned long oldest_invalid_trans_id = 0 ; | |
2077 | time_t start ; | |
2078 | unsigned long oldest_start = 0; | |
2079 | unsigned long cur_dblock = 0 ; | |
2080 | unsigned long newest_mount_id = 9 ; | |
2081 | struct buffer_head *d_bh ; | |
2082 | struct reiserfs_journal_header *jh ; | |
2083 | int valid_journal_header = 0 ; | |
2084 | int replay_count = 0 ; | |
2085 | int continue_replay = 1 ; | |
2086 | int ret ; | |
2087 | char b[BDEVNAME_SIZE]; | |
2088 | ||
2089 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) ; | |
2090 | reiserfs_info (p_s_sb, "checking transaction log (%s)\n", | |
2091 | bdevname(journal->j_dev_bd, b)); | |
2092 | start = get_seconds(); | |
2093 | ||
2094 | /* step 1, read in the journal header block. Check the transaction it says | |
2095 | ** is the first unflushed, and if that transaction is not valid, | |
2096 | ** replay is done | |
2097 | */ | |
2098 | journal->j_header_bh = journal_bread(p_s_sb, | |
2099 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + | |
2100 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)); | |
2101 | if (!journal->j_header_bh) { | |
2102 | return 1 ; | |
2103 | } | |
2104 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data) ; | |
2105 | if (le32_to_cpu(jh->j_first_unflushed_offset) >= 0 && | |
2106 | le32_to_cpu(jh->j_first_unflushed_offset) < SB_ONDISK_JOURNAL_SIZE(p_s_sb) && | |
2107 | le32_to_cpu(jh->j_last_flush_trans_id) > 0) { | |
2108 | oldest_start = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + | |
2109 | le32_to_cpu(jh->j_first_unflushed_offset) ; | |
2110 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2111 | newest_mount_id = le32_to_cpu(jh->j_mount_id); | |
2112 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1153: found in " | |
2113 | "header: first_unflushed_offset %d, last_flushed_trans_id " | |
2114 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), | |
2115 | le32_to_cpu(jh->j_last_flush_trans_id)) ; | |
2116 | valid_journal_header = 1 ; | |
2117 | ||
2118 | /* now, we try to read the first unflushed offset. If it is not valid, | |
2119 | ** there is nothing more we can do, and it makes no sense to read | |
2120 | ** through the whole log. | |
2121 | */ | |
2122 | d_bh = journal_bread(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + le32_to_cpu(jh->j_first_unflushed_offset)) ; | |
2123 | ret = journal_transaction_is_valid(p_s_sb, d_bh, NULL, NULL) ; | |
2124 | if (!ret) { | |
2125 | continue_replay = 0 ; | |
2126 | } | |
2127 | brelse(d_bh) ; | |
2128 | goto start_log_replay; | |
2129 | } | |
2130 | ||
2131 | if (continue_replay && bdev_read_only(p_s_sb->s_bdev)) { | |
2132 | reiserfs_warning (p_s_sb, | |
2133 | "clm-2076: device is readonly, unable to replay log") ; | |
2134 | return -1 ; | |
2135 | } | |
2136 | ||
2137 | /* ok, there are transactions that need to be replayed. start with the first log block, find | |
2138 | ** all the valid transactions, and pick out the oldest. | |
2139 | */ | |
2140 | while(continue_replay && cur_dblock < (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb))) { | |
2141 | /* Note that it is required for blocksize of primary fs device and journal | |
2142 | device to be the same */ | |
2143 | d_bh = reiserfs_breada(journal->j_dev_bd, cur_dblock, p_s_sb->s_blocksize, | |
2144 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb)) ; | |
2145 | ret = journal_transaction_is_valid(p_s_sb, d_bh, &oldest_invalid_trans_id, &newest_mount_id) ; | |
2146 | if (ret == 1) { | |
2147 | desc = (struct reiserfs_journal_desc *)d_bh->b_data ; | |
2148 | if (oldest_start == 0) { /* init all oldest_ values */ | |
2149 | oldest_trans_id = get_desc_trans_id(desc) ; | |
2150 | oldest_start = d_bh->b_blocknr ; | |
2151 | newest_mount_id = get_desc_mount_id(desc) ; | |
2152 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1179: Setting " | |
2153 | "oldest_start to offset %llu, trans_id %lu", | |
2154 | oldest_start - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
2155 | oldest_trans_id) ; | |
2156 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { | |
2157 | /* one we just read was older */ | |
2158 | oldest_trans_id = get_desc_trans_id(desc) ; | |
2159 | oldest_start = d_bh->b_blocknr ; | |
2160 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1180: Resetting " | |
2161 | "oldest_start to offset %lu, trans_id %lu", | |
2162 | oldest_start - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
2163 | oldest_trans_id) ; | |
2164 | } | |
2165 | if (newest_mount_id < get_desc_mount_id(desc)) { | |
2166 | newest_mount_id = get_desc_mount_id(desc) ; | |
2167 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " | |
2168 | "newest_mount_id to %d", get_desc_mount_id(desc)); | |
2169 | } | |
2170 | cur_dblock += get_desc_trans_len(desc) + 2 ; | |
2171 | } else { | |
2172 | cur_dblock++ ; | |
2173 | } | |
2174 | brelse(d_bh) ; | |
2175 | } | |
2176 | ||
2177 | start_log_replay: | |
2178 | cur_dblock = oldest_start ; | |
2179 | if (oldest_trans_id) { | |
2180 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1206: Starting replay " | |
2181 | "from offset %llu, trans_id %lu", | |
2182 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
2183 | oldest_trans_id) ; | |
2184 | ||
2185 | } | |
2186 | replay_count = 0 ; | |
2187 | while(continue_replay && oldest_trans_id > 0) { | |
2188 | ret = journal_read_transaction(p_s_sb, cur_dblock, oldest_start, oldest_trans_id, newest_mount_id) ; | |
2189 | if (ret < 0) { | |
2190 | return ret ; | |
2191 | } else if (ret != 0) { | |
2192 | break ; | |
2193 | } | |
2194 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start ; | |
2195 | replay_count++ ; | |
2196 | if (cur_dblock == oldest_start) | |
2197 | break; | |
2198 | } | |
2199 | ||
2200 | if (oldest_trans_id == 0) { | |
2201 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1225: No valid " | |
2202 | "transactions found") ; | |
2203 | } | |
2204 | /* j_start does not get set correctly if we don't replay any transactions. | |
2205 | ** if we had a valid journal_header, set j_start to the first unflushed transaction value, | |
2206 | ** copy the trans_id from the header | |
2207 | */ | |
2208 | if (valid_journal_header && replay_count == 0) { | |
2209 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset) ; | |
2210 | journal->j_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2211 | journal->j_last_flush_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) ; | |
2212 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; | |
2213 | } else { | |
2214 | journal->j_mount_id = newest_mount_id + 1 ; | |
2215 | } | |
2216 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " | |
2217 | "newest_mount_id to %lu", journal->j_mount_id) ; | |
2218 | journal->j_first_unflushed_offset = journal->j_start ; | |
2219 | if (replay_count > 0) { | |
2220 | reiserfs_info (p_s_sb, "replayed %d transactions in %lu seconds\n", | |
2221 | replay_count, get_seconds() - start) ; | |
2222 | } | |
2223 | if (!bdev_read_only(p_s_sb->s_bdev) && | |
2224 | _update_journal_header_block(p_s_sb, journal->j_start, | |
2225 | journal->j_last_flush_trans_id)) | |
2226 | { | |
2227 | /* replay failed, caller must call free_journal_ram and abort | |
2228 | ** the mount | |
2229 | */ | |
2230 | return -1 ; | |
2231 | } | |
2232 | return 0 ; | |
2233 | } | |
2234 | ||
2235 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) | |
2236 | { | |
2237 | struct reiserfs_journal_list *jl; | |
2238 | retry: | |
2239 | jl = reiserfs_kmalloc(sizeof(struct reiserfs_journal_list), GFP_NOFS, s); | |
2240 | if (!jl) { | |
2241 | yield(); | |
2242 | goto retry; | |
2243 | } | |
2244 | memset(jl, 0, sizeof(*jl)); | |
2245 | INIT_LIST_HEAD(&jl->j_list); | |
2246 | INIT_LIST_HEAD(&jl->j_working_list); | |
2247 | INIT_LIST_HEAD(&jl->j_tail_bh_list); | |
2248 | INIT_LIST_HEAD(&jl->j_bh_list); | |
2249 | sema_init(&jl->j_commit_lock, 1); | |
2250 | SB_JOURNAL(s)->j_num_lists++; | |
2251 | get_journal_list(jl); | |
2252 | return jl; | |
2253 | } | |
2254 | ||
2255 | static void journal_list_init(struct super_block *p_s_sb) { | |
2256 | SB_JOURNAL(p_s_sb)->j_current_jl = alloc_journal_list(p_s_sb); | |
2257 | } | |
2258 | ||
2259 | static int release_journal_dev( struct super_block *super, | |
2260 | struct reiserfs_journal *journal ) | |
2261 | { | |
2262 | int result; | |
2263 | ||
2264 | result = 0; | |
2265 | ||
2266 | if( journal -> j_dev_file != NULL ) { | |
2267 | result = filp_close( journal -> j_dev_file, NULL ); | |
2268 | journal -> j_dev_file = NULL; | |
2269 | journal -> j_dev_bd = NULL; | |
2270 | } else if( journal -> j_dev_bd != NULL ) { | |
2271 | result = blkdev_put( journal -> j_dev_bd ); | |
2272 | journal -> j_dev_bd = NULL; | |
2273 | } | |
2274 | ||
2275 | if( result != 0 ) { | |
2276 | reiserfs_warning(super, "sh-457: release_journal_dev: Cannot release journal device: %i", result ); | |
2277 | } | |
2278 | return result; | |
2279 | } | |
2280 | ||
2281 | static int journal_init_dev( struct super_block *super, | |
2282 | struct reiserfs_journal *journal, | |
2283 | const char *jdev_name ) | |
2284 | { | |
2285 | int result; | |
2286 | dev_t jdev; | |
2287 | int blkdev_mode = FMODE_READ | FMODE_WRITE; | |
2288 | char b[BDEVNAME_SIZE]; | |
2289 | ||
2290 | result = 0; | |
2291 | ||
2292 | journal -> j_dev_bd = NULL; | |
2293 | journal -> j_dev_file = NULL; | |
2294 | jdev = SB_ONDISK_JOURNAL_DEVICE( super ) ? | |
2295 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; | |
2296 | ||
2297 | if (bdev_read_only(super->s_bdev)) | |
2298 | blkdev_mode = FMODE_READ; | |
2299 | ||
2300 | /* there is no "jdev" option and journal is on separate device */ | |
2301 | if( ( !jdev_name || !jdev_name[ 0 ] ) ) { | |
2302 | journal->j_dev_bd = open_by_devnum(jdev, blkdev_mode); | |
2303 | if (IS_ERR(journal->j_dev_bd)) { | |
2304 | result = PTR_ERR(journal->j_dev_bd); | |
2305 | journal->j_dev_bd = NULL; | |
2306 | reiserfs_warning (super, "sh-458: journal_init_dev: " | |
2307 | "cannot init journal device '%s': %i", | |
2308 | __bdevname(jdev, b), result ); | |
2309 | return result; | |
2310 | } else if (jdev != super->s_dev) | |
2311 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
2312 | return 0; | |
2313 | } | |
2314 | ||
2315 | journal -> j_dev_file = filp_open( jdev_name, 0, 0 ); | |
2316 | if( !IS_ERR( journal -> j_dev_file ) ) { | |
2317 | struct inode *jdev_inode = journal->j_dev_file->f_mapping->host; | |
2318 | if( !S_ISBLK( jdev_inode -> i_mode ) ) { | |
74f9f974 ES |
2319 | reiserfs_warning(super, "journal_init_dev: '%s' is " |
2320 | "not a block device", jdev_name ); | |
1da177e4 | 2321 | result = -ENOTBLK; |
74f9f974 | 2322 | release_journal_dev( super, journal ); |
1da177e4 LT |
2323 | } else { |
2324 | /* ok */ | |
2325 | journal->j_dev_bd = I_BDEV(jdev_inode); | |
2326 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
74f9f974 ES |
2327 | reiserfs_info(super, "journal_init_dev: journal device: %s\n", |
2328 | bdevname(journal->j_dev_bd, b)); | |
1da177e4 LT |
2329 | } |
2330 | } else { | |
2331 | result = PTR_ERR( journal -> j_dev_file ); | |
2332 | journal -> j_dev_file = NULL; | |
2333 | reiserfs_warning (super, | |
2334 | "journal_init_dev: Cannot open '%s': %i", | |
2335 | jdev_name, result ); | |
2336 | } | |
1da177e4 LT |
2337 | return result; |
2338 | } | |
2339 | ||
2340 | /* | |
2341 | ** must be called once on fs mount. calls journal_read for you | |
2342 | */ | |
2343 | int journal_init(struct super_block *p_s_sb, const char * j_dev_name, int old_format, unsigned int commit_max_age) { | |
2344 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(p_s_sb) * 2 ; | |
2345 | struct buffer_head *bhjh; | |
2346 | struct reiserfs_super_block * rs; | |
2347 | struct reiserfs_journal_header *jh; | |
2348 | struct reiserfs_journal *journal; | |
2349 | struct reiserfs_journal_list *jl; | |
2350 | char b[BDEVNAME_SIZE]; | |
2351 | ||
2352 | journal = SB_JOURNAL(p_s_sb) = vmalloc(sizeof (struct reiserfs_journal)) ; | |
2353 | if (!journal) { | |
2354 | reiserfs_warning (p_s_sb, "journal-1256: unable to get memory for journal structure") ; | |
2355 | return 1 ; | |
2356 | } | |
2357 | memset(journal, 0, sizeof(struct reiserfs_journal)) ; | |
2358 | INIT_LIST_HEAD(&journal->j_bitmap_nodes) ; | |
2359 | INIT_LIST_HEAD (&journal->j_prealloc_list); | |
2360 | INIT_LIST_HEAD(&journal->j_working_list); | |
2361 | INIT_LIST_HEAD(&journal->j_journal_list); | |
2362 | journal->j_persistent_trans = 0; | |
2363 | if (reiserfs_allocate_list_bitmaps(p_s_sb, | |
2364 | journal->j_list_bitmap, | |
2365 | SB_BMAP_NR(p_s_sb))) | |
2366 | goto free_and_return ; | |
2367 | allocate_bitmap_nodes(p_s_sb) ; | |
2368 | ||
2369 | /* reserved for journal area support */ | |
2370 | SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) = (old_format ? | |
2371 | REISERFS_OLD_DISK_OFFSET_IN_BYTES / p_s_sb->s_blocksize + | |
2372 | SB_BMAP_NR(p_s_sb) + 1 : | |
2373 | REISERFS_DISK_OFFSET_IN_BYTES / p_s_sb->s_blocksize + 2); | |
2374 | ||
2375 | /* Sanity check to see is the standard journal fitting withing first bitmap | |
2376 | (actual for small blocksizes) */ | |
2377 | if ( !SB_ONDISK_JOURNAL_DEVICE( p_s_sb ) && | |
2378 | (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb) > p_s_sb->s_blocksize * 8) ) { | |
2379 | reiserfs_warning (p_s_sb, "journal-1393: journal does not fit for area " | |
2380 | "addressed by first of bitmap blocks. It starts at " | |
2381 | "%u and its size is %u. Block size %ld", | |
2382 | SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb), | |
2383 | SB_ONDISK_JOURNAL_SIZE(p_s_sb), p_s_sb->s_blocksize); | |
2384 | goto free_and_return; | |
2385 | } | |
2386 | ||
2387 | if( journal_init_dev( p_s_sb, journal, j_dev_name ) != 0 ) { | |
2388 | reiserfs_warning (p_s_sb, "sh-462: unable to initialize jornal device"); | |
2389 | goto free_and_return; | |
2390 | } | |
2391 | ||
2392 | rs = SB_DISK_SUPER_BLOCK(p_s_sb); | |
2393 | ||
2394 | /* read journal header */ | |
2395 | bhjh = journal_bread(p_s_sb, | |
2396 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + SB_ONDISK_JOURNAL_SIZE(p_s_sb)); | |
2397 | if (!bhjh) { | |
2398 | reiserfs_warning (p_s_sb, "sh-459: unable to read journal header"); | |
2399 | goto free_and_return; | |
2400 | } | |
2401 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); | |
2402 | ||
2403 | /* make sure that journal matches to the super block */ | |
b8cc936f | 2404 | if (is_reiserfs_jr(rs) && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != sb_jp_journal_magic(rs))) { |
1da177e4 LT |
2405 | reiserfs_warning (p_s_sb, "sh-460: journal header magic %x " |
2406 | "(device %s) does not match to magic found in super " | |
2407 | "block %x", | |
2408 | jh->jh_journal.jp_journal_magic, | |
2409 | bdevname( journal->j_dev_bd, b), | |
2410 | sb_jp_journal_magic(rs)); | |
2411 | brelse (bhjh); | |
2412 | goto free_and_return; | |
2413 | } | |
2414 | ||
2415 | journal->j_trans_max = le32_to_cpu (jh->jh_journal.jp_journal_trans_max); | |
2416 | journal->j_max_batch = le32_to_cpu (jh->jh_journal.jp_journal_max_batch); | |
2417 | journal->j_max_commit_age = le32_to_cpu (jh->jh_journal.jp_journal_max_commit_age); | |
2418 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
2419 | ||
2420 | if (journal->j_trans_max) { | |
2421 | /* make sure these parameters are available, assign it if they are not */ | |
2422 | __u32 initial = journal->j_trans_max; | |
2423 | __u32 ratio = 1; | |
2424 | ||
2425 | if (p_s_sb->s_blocksize < 4096) | |
2426 | ratio = 4096 / p_s_sb->s_blocksize; | |
2427 | ||
2428 | if (SB_ONDISK_JOURNAL_SIZE(p_s_sb)/journal->j_trans_max < JOURNAL_MIN_RATIO) | |
2429 | journal->j_trans_max = SB_ONDISK_JOURNAL_SIZE(p_s_sb) / JOURNAL_MIN_RATIO; | |
2430 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio) | |
2431 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT / ratio; | |
2432 | if (journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio) | |
2433 | journal->j_trans_max = JOURNAL_TRANS_MIN_DEFAULT / ratio; | |
2434 | ||
2435 | if (journal->j_trans_max != initial) | |
2436 | reiserfs_warning (p_s_sb, "sh-461: journal_init: wrong transaction max size (%u). Changed to %u", | |
2437 | initial, journal->j_trans_max); | |
2438 | ||
2439 | journal->j_max_batch = journal->j_trans_max* | |
2440 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT; | |
2441 | } | |
2442 | ||
2443 | if (!journal->j_trans_max) { | |
2444 | /*we have the file system was created by old version of mkreiserfs | |
2445 | so this field contains zero value */ | |
2446 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT ; | |
2447 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT ; | |
2448 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE ; | |
2449 | ||
2450 | /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096 | |
2451 | trans max size is decreased proportionally */ | |
2452 | if (p_s_sb->s_blocksize < 4096) { | |
2453 | journal->j_trans_max /= (4096 / p_s_sb->s_blocksize) ; | |
2454 | journal->j_max_batch = (journal->j_trans_max) * 9 / 10 ; | |
2455 | } | |
2456 | } | |
2457 | ||
2458 | journal->j_default_max_commit_age = journal->j_max_commit_age; | |
2459 | ||
2460 | if (commit_max_age != 0) { | |
2461 | journal->j_max_commit_age = commit_max_age; | |
2462 | journal->j_max_trans_age = commit_max_age; | |
2463 | } | |
2464 | ||
2465 | reiserfs_info (p_s_sb, "journal params: device %s, size %u, " | |
2466 | "journal first block %u, max trans len %u, max batch %u, " | |
2467 | "max commit age %u, max trans age %u\n", | |
2468 | bdevname( journal->j_dev_bd, b), | |
2469 | SB_ONDISK_JOURNAL_SIZE(p_s_sb), | |
2470 | SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb), | |
2471 | journal->j_trans_max, | |
2472 | journal->j_max_batch, | |
2473 | journal->j_max_commit_age, | |
2474 | journal->j_max_trans_age); | |
2475 | ||
2476 | brelse (bhjh); | |
2477 | ||
2478 | journal->j_list_bitmap_index = 0 ; | |
2479 | journal_list_init(p_s_sb) ; | |
2480 | ||
2481 | memset(journal->j_list_hash_table, 0, JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)) ; | |
2482 | ||
2483 | INIT_LIST_HEAD(&journal->j_dirty_buffers) ; | |
2484 | spin_lock_init(&journal->j_dirty_buffers_lock) ; | |
2485 | ||
2486 | journal->j_start = 0 ; | |
2487 | journal->j_len = 0 ; | |
2488 | journal->j_len_alloc = 0 ; | |
2489 | atomic_set(&(journal->j_wcount), 0) ; | |
2490 | atomic_set(&(journal->j_async_throttle), 0) ; | |
2491 | journal->j_bcount = 0 ; | |
2492 | journal->j_trans_start_time = 0 ; | |
2493 | journal->j_last = NULL ; | |
2494 | journal->j_first = NULL ; | |
2495 | init_waitqueue_head(&(journal->j_join_wait)) ; | |
2496 | sema_init(&journal->j_lock, 1); | |
2497 | sema_init(&journal->j_flush_sem, 1); | |
2498 | ||
2499 | journal->j_trans_id = 10 ; | |
2500 | journal->j_mount_id = 10 ; | |
2501 | journal->j_state = 0 ; | |
2502 | atomic_set(&(journal->j_jlock), 0) ; | |
2503 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes) ; | |
2504 | journal->j_cnode_free_orig = journal->j_cnode_free_list ; | |
2505 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0 ; | |
2506 | journal->j_cnode_used = 0 ; | |
2507 | journal->j_must_wait = 0 ; | |
2508 | ||
2509 | init_journal_hash(p_s_sb) ; | |
2510 | jl = journal->j_current_jl; | |
2511 | jl->j_list_bitmap = get_list_bitmap(p_s_sb, jl); | |
2512 | if (!jl->j_list_bitmap) { | |
2513 | reiserfs_warning(p_s_sb, "journal-2005, get_list_bitmap failed for journal list 0") ; | |
2514 | goto free_and_return; | |
2515 | } | |
2516 | if (journal_read(p_s_sb) < 0) { | |
2517 | reiserfs_warning(p_s_sb, "Replay Failure, unable to mount") ; | |
2518 | goto free_and_return; | |
2519 | } | |
2520 | ||
2521 | reiserfs_mounted_fs_count++ ; | |
2522 | if (reiserfs_mounted_fs_count <= 1) | |
2523 | commit_wq = create_workqueue("reiserfs"); | |
2524 | ||
2525 | INIT_WORK(&journal->j_work, flush_async_commits, p_s_sb); | |
2526 | return 0 ; | |
2527 | free_and_return: | |
2528 | free_journal_ram(p_s_sb); | |
2529 | return 1; | |
2530 | } | |
2531 | ||
2532 | /* | |
2533 | ** test for a polite end of the current transaction. Used by file_write, and should | |
2534 | ** be used by delete to make sure they don't write more than can fit inside a single | |
2535 | ** transaction | |
2536 | */ | |
2537 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, int new_alloc) { | |
2538 | struct reiserfs_journal *journal = SB_JOURNAL (th->t_super); | |
2539 | time_t now = get_seconds() ; | |
2540 | /* cannot restart while nested */ | |
2541 | BUG_ON (!th->t_trans_id); | |
2542 | if (th->t_refcount > 1) | |
2543 | return 0 ; | |
2544 | if ( journal->j_must_wait > 0 || | |
2545 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || | |
2546 | atomic_read(&(journal->j_jlock)) || | |
2547 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || | |
2548 | journal->j_cnode_free < (journal->j_trans_max * 3)) { | |
2549 | return 1 ; | |
2550 | } | |
2551 | return 0 ; | |
2552 | } | |
2553 | ||
2554 | /* this must be called inside a transaction, and requires the | |
2555 | ** kernel_lock to be held | |
2556 | */ | |
2557 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) { | |
2558 | struct reiserfs_journal *journal = SB_JOURNAL (th->t_super); | |
2559 | BUG_ON (!th->t_trans_id); | |
2560 | journal->j_must_wait = 1 ; | |
2561 | set_bit(J_WRITERS_BLOCKED, &journal->j_state) ; | |
2562 | return ; | |
2563 | } | |
2564 | ||
2565 | /* this must be called without a transaction started, and does not | |
2566 | ** require BKL | |
2567 | */ | |
2568 | void reiserfs_allow_writes(struct super_block *s) { | |
2569 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
2570 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state) ; | |
2571 | wake_up(&journal->j_join_wait) ; | |
2572 | } | |
2573 | ||
2574 | /* this must be called without a transaction started, and does not | |
2575 | ** require BKL | |
2576 | */ | |
2577 | void reiserfs_wait_on_write_block(struct super_block *s) { | |
2578 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
2579 | wait_event(journal->j_join_wait, | |
2580 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)) ; | |
2581 | } | |
2582 | ||
2583 | static void queue_log_writer(struct super_block *s) { | |
2584 | wait_queue_t wait; | |
2585 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
2586 | set_bit(J_WRITERS_QUEUED, &journal->j_state); | |
2587 | ||
2588 | /* | |
2589 | * we don't want to use wait_event here because | |
2590 | * we only want to wait once. | |
2591 | */ | |
2592 | init_waitqueue_entry(&wait, current); | |
2593 | add_wait_queue(&journal->j_join_wait, &wait); | |
2594 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2595 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2596 | schedule(); | |
2597 | current->state = TASK_RUNNING; | |
2598 | remove_wait_queue(&journal->j_join_wait, &wait); | |
2599 | } | |
2600 | ||
2601 | static void wake_queued_writers(struct super_block *s) { | |
2602 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
2603 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2604 | wake_up(&journal->j_join_wait); | |
2605 | } | |
2606 | ||
2607 | static void let_transaction_grow(struct super_block *sb, | |
2608 | unsigned long trans_id) | |
2609 | { | |
2610 | struct reiserfs_journal *journal = SB_JOURNAL (sb); | |
2611 | unsigned long bcount = journal->j_bcount; | |
2612 | while(1) { | |
2613 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2614 | schedule_timeout(1); | |
2615 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; | |
2616 | while ((atomic_read(&journal->j_wcount) > 0 || | |
2617 | atomic_read(&journal->j_jlock)) && | |
2618 | journal->j_trans_id == trans_id) { | |
2619 | queue_log_writer(sb); | |
2620 | } | |
2621 | if (journal->j_trans_id != trans_id) | |
2622 | break; | |
2623 | if (bcount == journal->j_bcount) | |
2624 | break; | |
2625 | bcount = journal->j_bcount; | |
2626 | } | |
2627 | } | |
2628 | ||
2629 | /* join == true if you must join an existing transaction. | |
2630 | ** join == false if you can deal with waiting for others to finish | |
2631 | ** | |
2632 | ** this will block until the transaction is joinable. send the number of blocks you | |
2633 | ** expect to use in nblocks. | |
2634 | */ | |
2635 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb,unsigned long nblocks,int join) { | |
2636 | time_t now = get_seconds() ; | |
2637 | int old_trans_id ; | |
2638 | struct reiserfs_journal *journal = SB_JOURNAL(p_s_sb); | |
2639 | struct reiserfs_transaction_handle myth; | |
2640 | int sched_count = 0; | |
2641 | int retval; | |
2642 | ||
2643 | reiserfs_check_lock_depth(p_s_sb, "journal_begin") ; | |
bdd5b29c JK |
2644 | if (nblocks > journal->j_trans_max) |
2645 | BUG(); | |
1da177e4 LT |
2646 | |
2647 | PROC_INFO_INC( p_s_sb, journal.journal_being ); | |
2648 | /* set here for journal_join */ | |
2649 | th->t_refcount = 1; | |
2650 | th->t_super = p_s_sb ; | |
2651 | ||
2652 | relock: | |
2653 | lock_journal(p_s_sb) ; | |
2654 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted (journal)) { | |
2655 | unlock_journal (p_s_sb); | |
2656 | retval = journal->j_errno; | |
2657 | goto out_fail; | |
2658 | } | |
2659 | journal->j_bcount++; | |
2660 | ||
2661 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { | |
2662 | unlock_journal(p_s_sb) ; | |
2663 | reiserfs_wait_on_write_block(p_s_sb) ; | |
2664 | PROC_INFO_INC( p_s_sb, journal.journal_relock_writers ); | |
2665 | goto relock ; | |
2666 | } | |
2667 | now = get_seconds(); | |
2668 | ||
2669 | /* if there is no room in the journal OR | |
2670 | ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning | |
2671 | ** we don't sleep if there aren't other writers | |
2672 | */ | |
2673 | ||
2674 | if ( (!join && journal->j_must_wait > 0) || | |
2675 | ( !join && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) || | |
2676 | (!join && atomic_read(&journal->j_wcount) > 0 && journal->j_trans_start_time > 0 && | |
2677 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) || | |
2678 | (!join && atomic_read(&journal->j_jlock)) || | |
2679 | (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { | |
2680 | ||
2681 | old_trans_id = journal->j_trans_id; | |
2682 | unlock_journal(p_s_sb) ; /* allow others to finish this transaction */ | |
2683 | ||
2684 | if (!join && (journal->j_len_alloc + nblocks + 2) >= | |
2685 | journal->j_max_batch && | |
2686 | ((journal->j_len + nblocks + 2) * 100) < (journal->j_len_alloc * 75)) | |
2687 | { | |
2688 | if (atomic_read(&journal->j_wcount) > 10) { | |
2689 | sched_count++; | |
2690 | queue_log_writer(p_s_sb); | |
2691 | goto relock; | |
2692 | } | |
2693 | } | |
2694 | /* don't mess with joining the transaction if all we have to do is | |
2695 | * wait for someone else to do a commit | |
2696 | */ | |
2697 | if (atomic_read(&journal->j_jlock)) { | |
2698 | while (journal->j_trans_id == old_trans_id && | |
2699 | atomic_read(&journal->j_jlock)) { | |
2700 | queue_log_writer(p_s_sb); | |
2701 | } | |
2702 | goto relock; | |
2703 | } | |
2704 | retval = journal_join(&myth, p_s_sb, 1) ; | |
2705 | if (retval) | |
2706 | goto out_fail; | |
2707 | ||
2708 | /* someone might have ended the transaction while we joined */ | |
2709 | if (old_trans_id != journal->j_trans_id) { | |
2710 | retval = do_journal_end(&myth, p_s_sb, 1, 0) ; | |
2711 | } else { | |
2712 | retval = do_journal_end(&myth, p_s_sb, 1, COMMIT_NOW) ; | |
2713 | } | |
2714 | ||
2715 | if (retval) | |
2716 | goto out_fail; | |
2717 | ||
2718 | PROC_INFO_INC( p_s_sb, journal.journal_relock_wcount ); | |
2719 | goto relock ; | |
2720 | } | |
2721 | /* we are the first writer, set trans_id */ | |
2722 | if (journal->j_trans_start_time == 0) { | |
2723 | journal->j_trans_start_time = get_seconds(); | |
2724 | } | |
2725 | atomic_inc(&(journal->j_wcount)) ; | |
2726 | journal->j_len_alloc += nblocks ; | |
2727 | th->t_blocks_logged = 0 ; | |
2728 | th->t_blocks_allocated = nblocks ; | |
2729 | th->t_trans_id = journal->j_trans_id ; | |
2730 | unlock_journal(p_s_sb) ; | |
2731 | INIT_LIST_HEAD (&th->t_list); | |
22e2c507 | 2732 | get_fs_excl(); |
1da177e4 LT |
2733 | return 0 ; |
2734 | ||
2735 | out_fail: | |
2736 | memset (th, 0, sizeof (*th)); | |
2737 | /* Re-set th->t_super, so we can properly keep track of how many | |
2738 | * persistent transactions there are. We need to do this so if this | |
2739 | * call is part of a failed restart_transaction, we can free it later */ | |
2740 | th->t_super = p_s_sb; | |
2741 | return retval; | |
2742 | } | |
2743 | ||
2744 | struct reiserfs_transaction_handle * | |
2745 | reiserfs_persistent_transaction(struct super_block *s, int nblocks) { | |
2746 | int ret ; | |
2747 | struct reiserfs_transaction_handle *th ; | |
2748 | ||
2749 | /* if we're nesting into an existing transaction. It will be | |
2750 | ** persistent on its own | |
2751 | */ | |
2752 | if (reiserfs_transaction_running(s)) { | |
2753 | th = current->journal_info ; | |
2754 | th->t_refcount++ ; | |
2755 | if (th->t_refcount < 2) { | |
2756 | BUG() ; | |
2757 | } | |
2758 | return th ; | |
2759 | } | |
2760 | th = reiserfs_kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS, s) ; | |
2761 | if (!th) | |
2762 | return NULL; | |
2763 | ret = journal_begin(th, s, nblocks) ; | |
2764 | if (ret) { | |
2765 | reiserfs_kfree(th, sizeof(struct reiserfs_transaction_handle), s) ; | |
2766 | return NULL; | |
2767 | } | |
2768 | ||
2769 | SB_JOURNAL(s)->j_persistent_trans++; | |
2770 | return th ; | |
2771 | } | |
2772 | ||
2773 | int | |
2774 | reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) { | |
2775 | struct super_block *s = th->t_super; | |
2776 | int ret = 0; | |
2777 | if (th->t_trans_id) | |
2778 | ret = journal_end(th, th->t_super, th->t_blocks_allocated); | |
2779 | else | |
2780 | ret = -EIO; | |
2781 | if (th->t_refcount == 0) { | |
2782 | SB_JOURNAL(s)->j_persistent_trans--; | |
2783 | reiserfs_kfree(th, sizeof(struct reiserfs_transaction_handle), s) ; | |
2784 | } | |
2785 | return ret; | |
2786 | } | |
2787 | ||
2788 | static int journal_join(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { | |
2789 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
2790 | ||
2791 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
2792 | ** pointer | |
2793 | */ | |
2794 | th->t_handle_save = cur_th ; | |
2795 | if (cur_th && cur_th->t_refcount > 1) { | |
2796 | BUG() ; | |
2797 | } | |
2798 | return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_JOIN) ; | |
2799 | } | |
2800 | ||
2801 | int journal_join_abort(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { | |
2802 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
2803 | ||
2804 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
2805 | ** pointer | |
2806 | */ | |
2807 | th->t_handle_save = cur_th ; | |
2808 | if (cur_th && cur_th->t_refcount > 1) { | |
2809 | BUG() ; | |
2810 | } | |
2811 | return do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_ABORT) ; | |
2812 | } | |
2813 | ||
2814 | int journal_begin(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb, unsigned long nblocks) { | |
2815 | struct reiserfs_transaction_handle *cur_th = current->journal_info ; | |
2816 | int ret ; | |
2817 | ||
2818 | th->t_handle_save = NULL ; | |
2819 | if (cur_th) { | |
2820 | /* we are nesting into the current transaction */ | |
2821 | if (cur_th->t_super == p_s_sb) { | |
2822 | BUG_ON (!cur_th->t_refcount); | |
2823 | cur_th->t_refcount++ ; | |
2824 | memcpy(th, cur_th, sizeof(*th)); | |
2825 | if (th->t_refcount <= 1) | |
2826 | reiserfs_warning (p_s_sb, "BAD: refcount <= 1, but journal_info != 0"); | |
2827 | return 0; | |
2828 | } else { | |
2829 | /* we've ended up with a handle from a different filesystem. | |
2830 | ** save it and restore on journal_end. This should never | |
2831 | ** really happen... | |
2832 | */ | |
2833 | reiserfs_warning(p_s_sb, "clm-2100: nesting info a different FS") ; | |
2834 | th->t_handle_save = current->journal_info ; | |
2835 | current->journal_info = th; | |
2836 | } | |
2837 | } else { | |
2838 | current->journal_info = th; | |
2839 | } | |
2840 | ret = do_journal_begin_r(th, p_s_sb, nblocks, JBEGIN_REG) ; | |
2841 | if (current->journal_info != th) | |
2842 | BUG() ; | |
2843 | ||
2844 | /* I guess this boils down to being the reciprocal of clm-2100 above. | |
2845 | * If do_journal_begin_r fails, we need to put it back, since journal_end | |
2846 | * won't be called to do it. */ | |
2847 | if (ret) | |
2848 | current->journal_info = th->t_handle_save; | |
2849 | else | |
2850 | BUG_ON (!th->t_refcount); | |
2851 | ||
2852 | return ret ; | |
2853 | } | |
2854 | ||
2855 | /* | |
2856 | ** puts bh into the current transaction. If it was already there, reorders removes the | |
2857 | ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). | |
2858 | ** | |
2859 | ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the | |
2860 | ** transaction is committed. | |
2861 | ** | |
2862 | ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. | |
2863 | */ | |
2864 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, struct buffer_head *bh) { | |
2865 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
2866 | struct reiserfs_journal_cnode *cn = NULL; | |
2867 | int count_already_incd = 0 ; | |
2868 | int prepared = 0 ; | |
2869 | BUG_ON (!th->t_trans_id); | |
2870 | ||
2871 | PROC_INFO_INC( p_s_sb, journal.mark_dirty ); | |
2872 | if (th->t_trans_id != journal->j_trans_id) { | |
2873 | reiserfs_panic(th->t_super, "journal-1577: handle trans id %ld != current trans id %ld\n", | |
2874 | th->t_trans_id, journal->j_trans_id); | |
2875 | } | |
2876 | ||
2877 | p_s_sb->s_dirt = 1; | |
2878 | ||
2879 | prepared = test_clear_buffer_journal_prepared (bh); | |
2880 | clear_buffer_journal_restore_dirty (bh); | |
2881 | /* already in this transaction, we are done */ | |
2882 | if (buffer_journaled(bh)) { | |
2883 | PROC_INFO_INC( p_s_sb, journal.mark_dirty_already ); | |
2884 | return 0 ; | |
2885 | } | |
2886 | ||
2887 | /* this must be turned into a panic instead of a warning. We can't allow | |
2888 | ** a dirty or journal_dirty or locked buffer to be logged, as some changes | |
2889 | ** could get to disk too early. NOT GOOD. | |
2890 | */ | |
2891 | if (!prepared || buffer_dirty(bh)) { | |
2892 | reiserfs_warning (p_s_sb, "journal-1777: buffer %llu bad state " | |
2893 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", | |
2894 | (unsigned long long)bh->b_blocknr, prepared ? ' ' : '!', | |
2895 | buffer_locked(bh) ? ' ' : '!', | |
2896 | buffer_dirty(bh) ? ' ' : '!', | |
2897 | buffer_journal_dirty(bh) ? ' ' : '!') ; | |
2898 | } | |
2899 | ||
2900 | if (atomic_read(&(journal->j_wcount)) <= 0) { | |
2901 | reiserfs_warning (p_s_sb, "journal-1409: journal_mark_dirty returning because j_wcount was %d", atomic_read(&(journal->j_wcount))) ; | |
2902 | return 1 ; | |
2903 | } | |
2904 | /* this error means I've screwed up, and we've overflowed the transaction. | |
2905 | ** Nothing can be done here, except make the FS readonly or panic. | |
2906 | */ | |
2907 | if (journal->j_len >= journal->j_trans_max) { | |
2908 | reiserfs_panic(th->t_super, "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n", journal->j_len) ; | |
2909 | } | |
2910 | ||
2911 | if (buffer_journal_dirty(bh)) { | |
2912 | count_already_incd = 1 ; | |
2913 | PROC_INFO_INC( p_s_sb, journal.mark_dirty_notjournal ); | |
2914 | clear_buffer_journal_dirty (bh); | |
2915 | } | |
2916 | ||
2917 | if (journal->j_len > journal->j_len_alloc) { | |
2918 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT ; | |
2919 | } | |
2920 | ||
2921 | set_buffer_journaled (bh); | |
2922 | ||
2923 | /* now put this guy on the end */ | |
2924 | if (!cn) { | |
2925 | cn = get_cnode(p_s_sb) ; | |
2926 | if (!cn) { | |
2927 | reiserfs_panic(p_s_sb, "get_cnode failed!\n"); | |
2928 | } | |
2929 | ||
2930 | if (th->t_blocks_logged == th->t_blocks_allocated) { | |
2931 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT ; | |
2932 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT ; | |
2933 | } | |
2934 | th->t_blocks_logged++ ; | |
2935 | journal->j_len++ ; | |
2936 | ||
2937 | cn->bh = bh ; | |
2938 | cn->blocknr = bh->b_blocknr ; | |
2939 | cn->sb = p_s_sb; | |
2940 | cn->jlist = NULL ; | |
2941 | insert_journal_hash(journal->j_hash_table, cn) ; | |
2942 | if (!count_already_incd) { | |
2943 | get_bh(bh) ; | |
2944 | } | |
2945 | } | |
2946 | cn->next = NULL ; | |
2947 | cn->prev = journal->j_last ; | |
2948 | cn->bh = bh ; | |
2949 | if (journal->j_last) { | |
2950 | journal->j_last->next = cn ; | |
2951 | journal->j_last = cn ; | |
2952 | } else { | |
2953 | journal->j_first = cn ; | |
2954 | journal->j_last = cn ; | |
2955 | } | |
2956 | return 0 ; | |
2957 | } | |
2958 | ||
2959 | int journal_end(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { | |
2960 | if (!current->journal_info && th->t_refcount > 1) | |
2961 | reiserfs_warning (p_s_sb, "REISER-NESTING: th NULL, refcount %d", | |
2962 | th->t_refcount); | |
2963 | ||
2964 | if (!th->t_trans_id) { | |
2965 | WARN_ON (1); | |
2966 | return -EIO; | |
2967 | } | |
2968 | ||
2969 | th->t_refcount--; | |
2970 | if (th->t_refcount > 0) { | |
2971 | struct reiserfs_transaction_handle *cur_th = current->journal_info ; | |
2972 | ||
2973 | /* we aren't allowed to close a nested transaction on a different | |
2974 | ** filesystem from the one in the task struct | |
2975 | */ | |
2976 | if (cur_th->t_super != th->t_super) | |
2977 | BUG() ; | |
2978 | ||
2979 | if (th != cur_th) { | |
2980 | memcpy(current->journal_info, th, sizeof(*th)); | |
2981 | th->t_trans_id = 0; | |
2982 | } | |
2983 | return 0; | |
2984 | } else { | |
2985 | return do_journal_end(th, p_s_sb, nblocks, 0) ; | |
2986 | } | |
2987 | } | |
2988 | ||
2989 | /* removes from the current transaction, relsing and descrementing any counters. | |
2990 | ** also files the removed buffer directly onto the clean list | |
2991 | ** | |
2992 | ** called by journal_mark_freed when a block has been deleted | |
2993 | ** | |
2994 | ** returns 1 if it cleaned and relsed the buffer. 0 otherwise | |
2995 | */ | |
2996 | static int remove_from_transaction(struct super_block *p_s_sb, b_blocknr_t blocknr, int already_cleaned) { | |
2997 | struct buffer_head *bh ; | |
2998 | struct reiserfs_journal_cnode *cn ; | |
2999 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3000 | int ret = 0; | |
3001 | ||
3002 | cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr) ; | |
3003 | if (!cn || !cn->bh) { | |
3004 | return ret ; | |
3005 | } | |
3006 | bh = cn->bh ; | |
3007 | if (cn->prev) { | |
3008 | cn->prev->next = cn->next ; | |
3009 | } | |
3010 | if (cn->next) { | |
3011 | cn->next->prev = cn->prev ; | |
3012 | } | |
3013 | if (cn == journal->j_first) { | |
3014 | journal->j_first = cn->next ; | |
3015 | } | |
3016 | if (cn == journal->j_last) { | |
3017 | journal->j_last = cn->prev ; | |
3018 | } | |
3019 | if (bh) | |
3020 | remove_journal_hash(p_s_sb, journal->j_hash_table, NULL, bh->b_blocknr, 0) ; | |
3021 | clear_buffer_journaled (bh); /* don't log this one */ | |
3022 | ||
3023 | if (!already_cleaned) { | |
3024 | clear_buffer_journal_dirty (bh); | |
3025 | clear_buffer_dirty(bh); | |
3026 | clear_buffer_journal_test (bh); | |
3027 | put_bh(bh) ; | |
3028 | if (atomic_read(&(bh->b_count)) < 0) { | |
3029 | reiserfs_warning (p_s_sb, "journal-1752: remove from trans, b_count < 0"); | |
3030 | } | |
3031 | ret = 1 ; | |
3032 | } | |
3033 | journal->j_len-- ; | |
3034 | journal->j_len_alloc-- ; | |
3035 | free_cnode(p_s_sb, cn) ; | |
3036 | return ret ; | |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | ** for any cnode in a journal list, it can only be dirtied of all the | |
3041 | ** transactions that include it are commited to disk. | |
3042 | ** this checks through each transaction, and returns 1 if you are allowed to dirty, | |
3043 | ** and 0 if you aren't | |
3044 | ** | |
3045 | ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log | |
3046 | ** blocks for a given transaction on disk | |
3047 | ** | |
3048 | */ | |
3049 | static int can_dirty(struct reiserfs_journal_cnode *cn) { | |
3050 | struct super_block *sb = cn->sb; | |
3051 | b_blocknr_t blocknr = cn->blocknr ; | |
3052 | struct reiserfs_journal_cnode *cur = cn->hprev ; | |
3053 | int can_dirty = 1 ; | |
3054 | ||
3055 | /* first test hprev. These are all newer than cn, so any node here | |
3056 | ** with the same block number and dev means this node can't be sent | |
3057 | ** to disk right now. | |
3058 | */ | |
3059 | while(cur && can_dirty) { | |
3060 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && | |
3061 | cur->blocknr == blocknr) { | |
3062 | can_dirty = 0 ; | |
3063 | } | |
3064 | cur = cur->hprev ; | |
3065 | } | |
3066 | /* then test hnext. These are all older than cn. As long as they | |
3067 | ** are committed to the log, it is safe to write cn to disk | |
3068 | */ | |
3069 | cur = cn->hnext ; | |
3070 | while(cur && can_dirty) { | |
3071 | if (cur->jlist && cur->jlist->j_len > 0 && | |
3072 | atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && | |
3073 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { | |
3074 | can_dirty = 0 ; | |
3075 | } | |
3076 | cur = cur->hnext ; | |
3077 | } | |
3078 | return can_dirty ; | |
3079 | } | |
3080 | ||
3081 | /* syncs the commit blocks, but does not force the real buffers to disk | |
3082 | ** will wait until the current transaction is done/commited before returning | |
3083 | */ | |
3084 | int journal_end_sync(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, unsigned long nblocks) { | |
3085 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3086 | ||
3087 | BUG_ON (!th->t_trans_id); | |
3088 | /* you can sync while nested, very, very bad */ | |
3089 | if (th->t_refcount > 1) { | |
3090 | BUG() ; | |
3091 | } | |
3092 | if (journal->j_len == 0) { | |
3093 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; | |
3094 | journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; | |
3095 | } | |
3096 | return do_journal_end(th, p_s_sb, nblocks, COMMIT_NOW | WAIT) ; | |
3097 | } | |
3098 | ||
3099 | /* | |
3100 | ** writeback the pending async commits to disk | |
3101 | */ | |
3102 | static void flush_async_commits(void *p) { | |
3103 | struct super_block *p_s_sb = p; | |
3104 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3105 | struct reiserfs_journal_list *jl; | |
3106 | struct list_head *entry; | |
3107 | ||
3108 | lock_kernel(); | |
3109 | if (!list_empty(&journal->j_journal_list)) { | |
3110 | /* last entry is the youngest, commit it and you get everything */ | |
3111 | entry = journal->j_journal_list.prev; | |
3112 | jl = JOURNAL_LIST_ENTRY(entry); | |
3113 | flush_commit_list(p_s_sb, jl, 1); | |
3114 | } | |
3115 | unlock_kernel(); | |
3116 | /* | |
3117 | * this is a little racey, but there's no harm in missing | |
3118 | * the filemap_fdata_write | |
3119 | */ | |
3120 | if (!atomic_read(&journal->j_async_throttle) && !reiserfs_is_journal_aborted (journal)) { | |
3121 | atomic_inc(&journal->j_async_throttle); | |
3122 | filemap_fdatawrite(p_s_sb->s_bdev->bd_inode->i_mapping); | |
3123 | atomic_dec(&journal->j_async_throttle); | |
3124 | } | |
3125 | } | |
3126 | ||
3127 | /* | |
3128 | ** flushes any old transactions to disk | |
3129 | ** ends the current transaction if it is too old | |
3130 | */ | |
3131 | int reiserfs_flush_old_commits(struct super_block *p_s_sb) { | |
3132 | time_t now ; | |
3133 | struct reiserfs_transaction_handle th ; | |
3134 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3135 | ||
3136 | now = get_seconds(); | |
3137 | /* safety check so we don't flush while we are replaying the log during | |
3138 | * mount | |
3139 | */ | |
3140 | if (list_empty(&journal->j_journal_list)) { | |
3141 | return 0 ; | |
3142 | } | |
3143 | ||
3144 | /* check the current transaction. If there are no writers, and it is | |
3145 | * too old, finish it, and force the commit blocks to disk | |
3146 | */ | |
3147 | if (atomic_read(&journal->j_wcount) <= 0 && | |
3148 | journal->j_trans_start_time > 0 && | |
3149 | journal->j_len > 0 && | |
3150 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) | |
3151 | { | |
3152 | if (!journal_join(&th, p_s_sb, 1)) { | |
3153 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; | |
3154 | journal_mark_dirty(&th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; | |
3155 | ||
3156 | /* we're only being called from kreiserfsd, it makes no sense to do | |
3157 | ** an async commit so that kreiserfsd can do it later | |
3158 | */ | |
3159 | do_journal_end(&th, p_s_sb,1, COMMIT_NOW | WAIT) ; | |
3160 | } | |
3161 | } | |
3162 | return p_s_sb->s_dirt; | |
3163 | } | |
3164 | ||
3165 | /* | |
3166 | ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit | |
3167 | ** | |
3168 | ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all | |
3169 | ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just | |
3170 | ** flushes the commit list and returns 0. | |
3171 | ** | |
3172 | ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. | |
3173 | ** | |
3174 | ** Note, we can't allow the journal_end to proceed while there are still writers in the log. | |
3175 | */ | |
3176 | static int check_journal_end(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb, | |
3177 | unsigned long nblocks, int flags) { | |
3178 | ||
3179 | time_t now ; | |
3180 | int flush = flags & FLUSH_ALL ; | |
3181 | int commit_now = flags & COMMIT_NOW ; | |
3182 | int wait_on_commit = flags & WAIT ; | |
3183 | struct reiserfs_journal_list *jl; | |
3184 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3185 | ||
3186 | BUG_ON (!th->t_trans_id); | |
3187 | ||
3188 | if (th->t_trans_id != journal->j_trans_id) { | |
3189 | reiserfs_panic(th->t_super, "journal-1577: handle trans id %ld != current trans id %ld\n", | |
3190 | th->t_trans_id, journal->j_trans_id); | |
3191 | } | |
3192 | ||
3193 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged) ; | |
3194 | if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ | |
3195 | atomic_dec(&(journal->j_wcount)) ; | |
3196 | } | |
3197 | ||
3198 | /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released | |
3199 | ** will be dealt with by next transaction that actually writes something, but should be taken | |
3200 | ** care of in this trans | |
3201 | */ | |
3202 | if (journal->j_len == 0) { | |
3203 | BUG(); | |
3204 | } | |
3205 | /* if wcount > 0, and we are called to with flush or commit_now, | |
3206 | ** we wait on j_join_wait. We will wake up when the last writer has | |
3207 | ** finished the transaction, and started it on its way to the disk. | |
3208 | ** Then, we flush the commit or journal list, and just return 0 | |
3209 | ** because the rest of journal end was already done for this transaction. | |
3210 | */ | |
3211 | if (atomic_read(&(journal->j_wcount)) > 0) { | |
3212 | if (flush || commit_now) { | |
3213 | unsigned trans_id ; | |
3214 | ||
3215 | jl = journal->j_current_jl; | |
3216 | trans_id = jl->j_trans_id; | |
3217 | if (wait_on_commit) | |
3218 | jl->j_state |= LIST_COMMIT_PENDING; | |
3219 | atomic_set(&(journal->j_jlock), 1) ; | |
3220 | if (flush) { | |
3221 | journal->j_next_full_flush = 1 ; | |
3222 | } | |
3223 | unlock_journal(p_s_sb) ; | |
3224 | ||
3225 | /* sleep while the current transaction is still j_jlocked */ | |
3226 | while(journal->j_trans_id == trans_id) { | |
3227 | if (atomic_read(&journal->j_jlock)) { | |
3228 | queue_log_writer(p_s_sb); | |
3229 | } else { | |
3230 | lock_journal(p_s_sb); | |
3231 | if (journal->j_trans_id == trans_id) { | |
3232 | atomic_set(&(journal->j_jlock), 1) ; | |
3233 | } | |
3234 | unlock_journal(p_s_sb); | |
3235 | } | |
3236 | } | |
3237 | if (journal->j_trans_id == trans_id) { | |
3238 | BUG(); | |
3239 | } | |
3240 | if (commit_now && journal_list_still_alive(p_s_sb, trans_id) && | |
3241 | wait_on_commit) | |
3242 | { | |
3243 | flush_commit_list(p_s_sb, jl, 1) ; | |
3244 | } | |
3245 | return 0 ; | |
3246 | } | |
3247 | unlock_journal(p_s_sb) ; | |
3248 | return 0 ; | |
3249 | } | |
3250 | ||
3251 | /* deal with old transactions where we are the last writers */ | |
3252 | now = get_seconds(); | |
3253 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
3254 | commit_now = 1 ; | |
3255 | journal->j_next_async_flush = 1 ; | |
3256 | } | |
3257 | /* don't batch when someone is waiting on j_join_wait */ | |
3258 | /* don't batch when syncing the commit or flushing the whole trans */ | |
3259 | if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) && !flush && !commit_now && | |
3260 | (journal->j_len < journal->j_max_batch) && | |
3261 | journal->j_len_alloc < journal->j_max_batch && journal->j_cnode_free > (journal->j_trans_max * 3)) { | |
3262 | journal->j_bcount++ ; | |
3263 | unlock_journal(p_s_sb) ; | |
3264 | return 0 ; | |
3265 | } | |
3266 | ||
3267 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(p_s_sb)) { | |
3268 | reiserfs_panic(p_s_sb, "journal-003: journal_end: j_start (%ld) is too high\n", journal->j_start) ; | |
3269 | } | |
3270 | return 1 ; | |
3271 | } | |
3272 | ||
3273 | /* | |
3274 | ** Does all the work that makes deleting blocks safe. | |
3275 | ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. | |
3276 | ** | |
3277 | ** otherwise: | |
3278 | ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes | |
3279 | ** before this transaction has finished. | |
3280 | ** | |
3281 | ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with | |
3282 | ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, | |
3283 | ** the block can't be reallocated yet. | |
3284 | ** | |
3285 | ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. | |
3286 | */ | |
3287 | int journal_mark_freed(struct reiserfs_transaction_handle *th, struct super_block *p_s_sb, b_blocknr_t blocknr) { | |
3288 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3289 | struct reiserfs_journal_cnode *cn = NULL ; | |
3290 | struct buffer_head *bh = NULL ; | |
3291 | struct reiserfs_list_bitmap *jb = NULL ; | |
3292 | int cleaned = 0 ; | |
3293 | BUG_ON (!th->t_trans_id); | |
3294 | ||
3295 | cn = get_journal_hash_dev(p_s_sb, journal->j_hash_table, blocknr); | |
3296 | if (cn && cn->bh) { | |
3297 | bh = cn->bh ; | |
3298 | get_bh(bh) ; | |
3299 | } | |
3300 | /* if it is journal new, we just remove it from this transaction */ | |
3301 | if (bh && buffer_journal_new(bh)) { | |
3302 | clear_buffer_journal_new (bh); | |
3303 | clear_prepared_bits(bh) ; | |
3304 | reiserfs_clean_and_file_buffer(bh) ; | |
3305 | cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned) ; | |
3306 | } else { | |
3307 | /* set the bit for this block in the journal bitmap for this transaction */ | |
3308 | jb = journal->j_current_jl->j_list_bitmap; | |
3309 | if (!jb) { | |
3310 | reiserfs_panic(p_s_sb, "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n") ; | |
3311 | } | |
3312 | set_bit_in_list_bitmap(p_s_sb, blocknr, jb) ; | |
3313 | ||
3314 | /* Note, the entire while loop is not allowed to schedule. */ | |
3315 | ||
3316 | if (bh) { | |
3317 | clear_prepared_bits(bh) ; | |
3318 | reiserfs_clean_and_file_buffer(bh) ; | |
3319 | } | |
3320 | cleaned = remove_from_transaction(p_s_sb, blocknr, cleaned) ; | |
3321 | ||
3322 | /* find all older transactions with this block, make sure they don't try to write it out */ | |
3323 | cn = get_journal_hash_dev(p_s_sb,journal->j_list_hash_table, blocknr) ; | |
3324 | while (cn) { | |
3325 | if (p_s_sb == cn->sb && blocknr == cn->blocknr) { | |
3326 | set_bit(BLOCK_FREED, &cn->state) ; | |
3327 | if (cn->bh) { | |
3328 | if (!cleaned) { | |
3329 | /* remove_from_transaction will brelse the buffer if it was | |
3330 | ** in the current trans | |
3331 | */ | |
3332 | clear_buffer_journal_dirty (cn->bh); | |
3333 | clear_buffer_dirty(cn->bh); | |
3334 | clear_buffer_journal_test(cn->bh); | |
3335 | cleaned = 1 ; | |
3336 | put_bh(cn->bh) ; | |
3337 | if (atomic_read(&(cn->bh->b_count)) < 0) { | |
3338 | reiserfs_warning (p_s_sb, "journal-2138: cn->bh->b_count < 0"); | |
3339 | } | |
3340 | } | |
3341 | if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ | |
3342 | atomic_dec(&(cn->jlist->j_nonzerolen)) ; | |
3343 | } | |
3344 | cn->bh = NULL ; | |
3345 | } | |
3346 | } | |
3347 | cn = cn->hnext ; | |
3348 | } | |
3349 | } | |
3350 | ||
3351 | if (bh) { | |
3352 | put_bh(bh) ; /* get_hash grabs the buffer */ | |
3353 | if (atomic_read(&(bh->b_count)) < 0) { | |
3354 | reiserfs_warning (p_s_sb, "journal-2165: bh->b_count < 0"); | |
3355 | } | |
3356 | } | |
3357 | return 0 ; | |
3358 | } | |
3359 | ||
3360 | void reiserfs_update_inode_transaction(struct inode *inode) { | |
3361 | struct reiserfs_journal *journal = SB_JOURNAL (inode->i_sb); | |
3362 | REISERFS_I(inode)->i_jl = journal->j_current_jl; | |
3363 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id ; | |
3364 | } | |
3365 | ||
3366 | /* | |
3367 | * returns -1 on error, 0 if no commits/barriers were done and 1 | |
3368 | * if a transaction was actually committed and the barrier was done | |
3369 | */ | |
3370 | static int __commit_trans_jl(struct inode *inode, unsigned long id, | |
3371 | struct reiserfs_journal_list *jl) | |
3372 | { | |
3373 | struct reiserfs_transaction_handle th ; | |
3374 | struct super_block *sb = inode->i_sb ; | |
3375 | struct reiserfs_journal *journal = SB_JOURNAL (sb); | |
3376 | int ret = 0; | |
3377 | ||
3378 | /* is it from the current transaction, or from an unknown transaction? */ | |
3379 | if (id == journal->j_trans_id) { | |
3380 | jl = journal->j_current_jl; | |
3381 | /* try to let other writers come in and grow this transaction */ | |
3382 | let_transaction_grow(sb, id); | |
3383 | if (journal->j_trans_id != id) { | |
3384 | goto flush_commit_only; | |
3385 | } | |
3386 | ||
3387 | ret = journal_begin(&th, sb, 1) ; | |
3388 | if (ret) | |
3389 | return ret; | |
3390 | ||
3391 | /* someone might have ended this transaction while we joined */ | |
3392 | if (journal->j_trans_id != id) { | |
3393 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), 1) ; | |
3394 | journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)) ; | |
3395 | ret = journal_end(&th, sb, 1) ; | |
3396 | goto flush_commit_only; | |
3397 | } | |
3398 | ||
3399 | ret = journal_end_sync(&th, sb, 1) ; | |
3400 | if (!ret) | |
3401 | ret = 1; | |
3402 | ||
3403 | } else { | |
3404 | /* this gets tricky, we have to make sure the journal list in | |
3405 | * the inode still exists. We know the list is still around | |
3406 | * if we've got a larger transaction id than the oldest list | |
3407 | */ | |
3408 | flush_commit_only: | |
3409 | if (journal_list_still_alive(inode->i_sb, id)) { | |
3410 | /* | |
3411 | * we only set ret to 1 when we know for sure | |
3412 | * the barrier hasn't been started yet on the commit | |
3413 | * block. | |
3414 | */ | |
3415 | if (atomic_read(&jl->j_commit_left) > 1) | |
3416 | ret = 1; | |
3417 | flush_commit_list(sb, jl, 1) ; | |
3418 | if (journal->j_errno) | |
3419 | ret = journal->j_errno; | |
3420 | } | |
3421 | } | |
3422 | /* otherwise the list is gone, and long since committed */ | |
3423 | return ret; | |
3424 | } | |
3425 | ||
3426 | int reiserfs_commit_for_inode(struct inode *inode) { | |
3427 | unsigned long id = REISERFS_I(inode)->i_trans_id; | |
3428 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; | |
3429 | ||
3430 | /* for the whole inode, assume unset id means it was | |
3431 | * changed in the current transaction. More conservative | |
3432 | */ | |
3433 | if (!id || !jl) { | |
3434 | reiserfs_update_inode_transaction(inode) ; | |
3435 | id = REISERFS_I(inode)->i_trans_id; | |
3436 | /* jl will be updated in __commit_trans_jl */ | |
3437 | } | |
3438 | ||
3439 | return __commit_trans_jl(inode, id, jl); | |
3440 | } | |
3441 | ||
3442 | void reiserfs_restore_prepared_buffer(struct super_block *p_s_sb, | |
3443 | struct buffer_head *bh) { | |
3444 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3445 | PROC_INFO_INC( p_s_sb, journal.restore_prepared ); | |
3446 | if (!bh) { | |
3447 | return ; | |
3448 | } | |
3449 | if (test_clear_buffer_journal_restore_dirty (bh) && | |
3450 | buffer_journal_dirty(bh)) { | |
3451 | struct reiserfs_journal_cnode *cn; | |
3452 | cn = get_journal_hash_dev(p_s_sb, | |
3453 | journal->j_list_hash_table, | |
3454 | bh->b_blocknr); | |
3455 | if (cn && can_dirty(cn)) { | |
3456 | set_buffer_journal_test (bh); | |
3457 | mark_buffer_dirty(bh); | |
3458 | } | |
3459 | } | |
3460 | clear_buffer_journal_prepared (bh); | |
3461 | } | |
3462 | ||
3463 | extern struct tree_balance *cur_tb ; | |
3464 | /* | |
3465 | ** before we can change a metadata block, we have to make sure it won't | |
3466 | ** be written to disk while we are altering it. So, we must: | |
3467 | ** clean it | |
3468 | ** wait on it. | |
3469 | ** | |
3470 | */ | |
3471 | int reiserfs_prepare_for_journal(struct super_block *p_s_sb, | |
3472 | struct buffer_head *bh, int wait) { | |
3473 | PROC_INFO_INC( p_s_sb, journal.prepare ); | |
3474 | ||
3475 | if (test_set_buffer_locked(bh)) { | |
3476 | if (!wait) | |
3477 | return 0; | |
3478 | lock_buffer(bh); | |
3479 | } | |
3480 | set_buffer_journal_prepared (bh); | |
3481 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { | |
3482 | clear_buffer_journal_test (bh); | |
3483 | set_buffer_journal_restore_dirty (bh); | |
3484 | } | |
3485 | unlock_buffer(bh); | |
3486 | return 1; | |
3487 | } | |
3488 | ||
3489 | static void flush_old_journal_lists(struct super_block *s) { | |
3490 | struct reiserfs_journal *journal = SB_JOURNAL (s); | |
3491 | struct reiserfs_journal_list *jl; | |
3492 | struct list_head *entry; | |
3493 | time_t now = get_seconds(); | |
3494 | ||
3495 | while(!list_empty(&journal->j_journal_list)) { | |
3496 | entry = journal->j_journal_list.next; | |
3497 | jl = JOURNAL_LIST_ENTRY(entry); | |
3498 | /* this check should always be run, to send old lists to disk */ | |
3499 | if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4))) { | |
3500 | flush_used_journal_lists(s, jl); | |
3501 | } else { | |
3502 | break; | |
3503 | } | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | ** long and ugly. If flush, will not return until all commit | |
3509 | ** blocks and all real buffers in the trans are on disk. | |
3510 | ** If no_async, won't return until all commit blocks are on disk. | |
3511 | ** | |
3512 | ** keep reading, there are comments as you go along | |
3513 | ** | |
3514 | ** If the journal is aborted, we just clean up. Things like flushing | |
3515 | ** journal lists, etc just won't happen. | |
3516 | */ | |
3517 | static int do_journal_end(struct reiserfs_transaction_handle *th, struct super_block * p_s_sb, unsigned long nblocks, | |
3518 | int flags) { | |
3519 | struct reiserfs_journal *journal = SB_JOURNAL (p_s_sb); | |
3520 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; | |
3521 | struct reiserfs_journal_cnode *last_cn = NULL; | |
3522 | struct reiserfs_journal_desc *desc ; | |
3523 | struct reiserfs_journal_commit *commit ; | |
3524 | struct buffer_head *c_bh ; /* commit bh */ | |
3525 | struct buffer_head *d_bh ; /* desc bh */ | |
3526 | int cur_write_start = 0 ; /* start index of current log write */ | |
3527 | int old_start ; | |
3528 | int i ; | |
3529 | int flush = flags & FLUSH_ALL ; | |
3530 | int wait_on_commit = flags & WAIT ; | |
3531 | struct reiserfs_journal_list *jl, *temp_jl; | |
3532 | struct list_head *entry, *safe; | |
3533 | unsigned long jindex; | |
3534 | unsigned long commit_trans_id; | |
3535 | int trans_half; | |
3536 | ||
3537 | BUG_ON (th->t_refcount > 1); | |
3538 | BUG_ON (!th->t_trans_id); | |
3539 | ||
22e2c507 | 3540 | put_fs_excl(); |
1da177e4 LT |
3541 | current->journal_info = th->t_handle_save; |
3542 | reiserfs_check_lock_depth(p_s_sb, "journal end"); | |
3543 | if (journal->j_len == 0) { | |
3544 | reiserfs_prepare_for_journal(p_s_sb, SB_BUFFER_WITH_SB(p_s_sb), 1) ; | |
3545 | journal_mark_dirty(th, p_s_sb, SB_BUFFER_WITH_SB(p_s_sb)) ; | |
3546 | } | |
3547 | ||
3548 | lock_journal(p_s_sb) ; | |
3549 | if (journal->j_next_full_flush) { | |
3550 | flags |= FLUSH_ALL ; | |
3551 | flush = 1 ; | |
3552 | } | |
3553 | if (journal->j_next_async_flush) { | |
3554 | flags |= COMMIT_NOW | WAIT; | |
3555 | wait_on_commit = 1; | |
3556 | } | |
3557 | ||
3558 | /* check_journal_end locks the journal, and unlocks if it does not return 1 | |
3559 | ** it tells us if we should continue with the journal_end, or just return | |
3560 | */ | |
3561 | if (!check_journal_end(th, p_s_sb, nblocks, flags)) { | |
3562 | p_s_sb->s_dirt = 1; | |
3563 | wake_queued_writers(p_s_sb); | |
3564 | reiserfs_async_progress_wait(p_s_sb); | |
3565 | goto out ; | |
3566 | } | |
3567 | ||
3568 | /* check_journal_end might set these, check again */ | |
3569 | if (journal->j_next_full_flush) { | |
3570 | flush = 1 ; | |
3571 | } | |
3572 | ||
3573 | /* | |
3574 | ** j must wait means we have to flush the log blocks, and the real blocks for | |
3575 | ** this transaction | |
3576 | */ | |
3577 | if (journal->j_must_wait > 0) { | |
3578 | flush = 1 ; | |
3579 | } | |
3580 | ||
3581 | #ifdef REISERFS_PREALLOCATE | |
3582 | /* quota ops might need to nest, setup the journal_info pointer for them */ | |
3583 | current->journal_info = th ; | |
3584 | reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into | |
3585 | * the transaction */ | |
3586 | current->journal_info = th->t_handle_save ; | |
3587 | #endif | |
3588 | ||
3589 | /* setup description block */ | |
3590 | d_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + journal->j_start) ; | |
3591 | set_buffer_uptodate(d_bh); | |
3592 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data ; | |
3593 | memset(d_bh->b_data, 0, d_bh->b_size) ; | |
3594 | memcpy(get_journal_desc_magic (d_bh), JOURNAL_DESC_MAGIC, 8) ; | |
3595 | set_desc_trans_id(desc, journal->j_trans_id) ; | |
3596 | ||
3597 | /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ | |
3598 | c_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + | |
3599 | ((journal->j_start + journal->j_len + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; | |
3600 | commit = (struct reiserfs_journal_commit *)c_bh->b_data ; | |
3601 | memset(c_bh->b_data, 0, c_bh->b_size) ; | |
3602 | set_commit_trans_id(commit, journal->j_trans_id) ; | |
3603 | set_buffer_uptodate(c_bh) ; | |
3604 | ||
3605 | /* init this journal list */ | |
3606 | jl = journal->j_current_jl; | |
3607 | ||
3608 | /* we lock the commit before doing anything because | |
3609 | * we want to make sure nobody tries to run flush_commit_list until | |
3610 | * the new transaction is fully setup, and we've already flushed the | |
3611 | * ordered bh list | |
3612 | */ | |
3613 | down(&jl->j_commit_lock); | |
3614 | ||
3615 | /* save the transaction id in case we need to commit it later */ | |
3616 | commit_trans_id = jl->j_trans_id; | |
3617 | ||
3618 | atomic_set(&jl->j_older_commits_done, 0) ; | |
3619 | jl->j_trans_id = journal->j_trans_id ; | |
3620 | jl->j_timestamp = journal->j_trans_start_time ; | |
3621 | jl->j_commit_bh = c_bh ; | |
3622 | jl->j_start = journal->j_start ; | |
3623 | jl->j_len = journal->j_len ; | |
3624 | atomic_set(&jl->j_nonzerolen, journal->j_len) ; | |
3625 | atomic_set(&jl->j_commit_left, journal->j_len + 2); | |
3626 | jl->j_realblock = NULL ; | |
3627 | ||
3628 | /* The ENTIRE FOR LOOP MUST not cause schedule to occur. | |
3629 | ** for each real block, add it to the journal list hash, | |
3630 | ** copy into real block index array in the commit or desc block | |
3631 | */ | |
3632 | trans_half = journal_trans_half(p_s_sb->s_blocksize); | |
3633 | for (i = 0, cn = journal->j_first ; cn ; cn = cn->next, i++) { | |
3634 | if (buffer_journaled (cn->bh)) { | |
3635 | jl_cn = get_cnode(p_s_sb) ; | |
3636 | if (!jl_cn) { | |
3637 | reiserfs_panic(p_s_sb, "journal-1676, get_cnode returned NULL\n") ; | |
3638 | } | |
3639 | if (i == 0) { | |
3640 | jl->j_realblock = jl_cn ; | |
3641 | } | |
3642 | jl_cn->prev = last_cn ; | |
3643 | jl_cn->next = NULL ; | |
3644 | if (last_cn) { | |
3645 | last_cn->next = jl_cn ; | |
3646 | } | |
3647 | last_cn = jl_cn ; | |
3648 | /* make sure the block we are trying to log is not a block | |
3649 | of journal or reserved area */ | |
3650 | ||
3651 | if (is_block_in_log_or_reserved_area(p_s_sb, cn->bh->b_blocknr)) { | |
3652 | reiserfs_panic(p_s_sb, "journal-2332: Trying to log block %lu, which is a log block\n", cn->bh->b_blocknr) ; | |
3653 | } | |
3654 | jl_cn->blocknr = cn->bh->b_blocknr ; | |
3655 | jl_cn->state = 0 ; | |
3656 | jl_cn->sb = p_s_sb; | |
3657 | jl_cn->bh = cn->bh ; | |
3658 | jl_cn->jlist = jl; | |
3659 | insert_journal_hash(journal->j_list_hash_table, jl_cn) ; | |
3660 | if (i < trans_half) { | |
3661 | desc->j_realblock[i] = cpu_to_le32(cn->bh->b_blocknr) ; | |
3662 | } else { | |
3663 | commit->j_realblock[i - trans_half] = cpu_to_le32(cn->bh->b_blocknr) ; | |
3664 | } | |
3665 | } else { | |
3666 | i-- ; | |
3667 | } | |
3668 | } | |
3669 | set_desc_trans_len(desc, journal->j_len) ; | |
3670 | set_desc_mount_id(desc, journal->j_mount_id) ; | |
3671 | set_desc_trans_id(desc, journal->j_trans_id) ; | |
3672 | set_commit_trans_len(commit, journal->j_len); | |
3673 | ||
3674 | /* special check in case all buffers in the journal were marked for not logging */ | |
3675 | if (journal->j_len == 0) { | |
3676 | BUG(); | |
3677 | } | |
3678 | ||
3679 | /* we're about to dirty all the log blocks, mark the description block | |
3680 | * dirty now too. Don't mark the commit block dirty until all the | |
3681 | * others are on disk | |
3682 | */ | |
3683 | mark_buffer_dirty(d_bh); | |
3684 | ||
3685 | /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ | |
3686 | cur_write_start = journal->j_start ; | |
3687 | cn = journal->j_first ; | |
3688 | jindex = 1 ; /* start at one so we don't get the desc again */ | |
3689 | while(cn) { | |
3690 | clear_buffer_journal_new (cn->bh); | |
3691 | /* copy all the real blocks into log area. dirty log blocks */ | |
3692 | if (buffer_journaled (cn->bh)) { | |
3693 | struct buffer_head *tmp_bh ; | |
3694 | char *addr; | |
3695 | struct page *page; | |
3696 | tmp_bh = journal_getblk(p_s_sb, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb) + | |
3697 | ((cur_write_start + jindex) % SB_ONDISK_JOURNAL_SIZE(p_s_sb))) ; | |
3698 | set_buffer_uptodate(tmp_bh); | |
3699 | page = cn->bh->b_page; | |
3700 | addr = kmap(page); | |
3701 | memcpy(tmp_bh->b_data, addr + offset_in_page(cn->bh->b_data), | |
3702 | cn->bh->b_size); | |
3703 | kunmap(page); | |
3704 | mark_buffer_dirty(tmp_bh); | |
3705 | jindex++ ; | |
3706 | set_buffer_journal_dirty (cn->bh); | |
3707 | clear_buffer_journaled (cn->bh); | |
3708 | } else { | |
3709 | /* JDirty cleared sometime during transaction. don't log this one */ | |
3710 | reiserfs_warning(p_s_sb, "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!") ; | |
3711 | brelse(cn->bh) ; | |
3712 | } | |
3713 | next = cn->next ; | |
3714 | free_cnode(p_s_sb, cn) ; | |
3715 | cn = next ; | |
3716 | cond_resched(); | |
3717 | } | |
3718 | ||
3719 | /* we are done with both the c_bh and d_bh, but | |
3720 | ** c_bh must be written after all other commit blocks, | |
3721 | ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. | |
3722 | */ | |
3723 | ||
3724 | journal->j_current_jl = alloc_journal_list(p_s_sb); | |
3725 | ||
3726 | /* now it is safe to insert this transaction on the main list */ | |
3727 | list_add_tail(&jl->j_list, &journal->j_journal_list); | |
3728 | list_add_tail(&jl->j_working_list, &journal->j_working_list); | |
3729 | journal->j_num_work_lists++; | |
3730 | ||
3731 | /* reset journal values for the next transaction */ | |
3732 | old_start = journal->j_start ; | |
3733 | journal->j_start = (journal->j_start + journal->j_len + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb); | |
3734 | atomic_set(&(journal->j_wcount), 0) ; | |
3735 | journal->j_bcount = 0 ; | |
3736 | journal->j_last = NULL ; | |
3737 | journal->j_first = NULL ; | |
3738 | journal->j_len = 0 ; | |
3739 | journal->j_trans_start_time = 0 ; | |
3740 | journal->j_trans_id++ ; | |
3741 | journal->j_current_jl->j_trans_id = journal->j_trans_id; | |
3742 | journal->j_must_wait = 0 ; | |
3743 | journal->j_len_alloc = 0 ; | |
3744 | journal->j_next_full_flush = 0 ; | |
3745 | journal->j_next_async_flush = 0 ; | |
3746 | init_journal_hash(p_s_sb) ; | |
3747 | ||
3748 | // make sure reiserfs_add_jh sees the new current_jl before we | |
3749 | // write out the tails | |
3750 | smp_mb(); | |
3751 | ||
3752 | /* tail conversion targets have to hit the disk before we end the | |
3753 | * transaction. Otherwise a later transaction might repack the tail | |
3754 | * before this transaction commits, leaving the data block unflushed and | |
3755 | * clean, if we crash before the later transaction commits, the data block | |
3756 | * is lost. | |
3757 | */ | |
3758 | if (!list_empty(&jl->j_tail_bh_list)) { | |
3759 | unlock_kernel(); | |
3760 | write_ordered_buffers(&journal->j_dirty_buffers_lock, | |
3761 | journal, jl, &jl->j_tail_bh_list); | |
3762 | lock_kernel(); | |
3763 | } | |
3764 | if (!list_empty(&jl->j_tail_bh_list)) | |
3765 | BUG(); | |
3766 | up(&jl->j_commit_lock); | |
3767 | ||
3768 | /* honor the flush wishes from the caller, simple commits can | |
3769 | ** be done outside the journal lock, they are done below | |
3770 | ** | |
3771 | ** if we don't flush the commit list right now, we put it into | |
3772 | ** the work queue so the people waiting on the async progress work | |
3773 | ** queue don't wait for this proc to flush journal lists and such. | |
3774 | */ | |
3775 | if (flush) { | |
3776 | flush_commit_list(p_s_sb, jl, 1) ; | |
3777 | flush_journal_list(p_s_sb, jl, 1) ; | |
3778 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) | |
3779 | queue_delayed_work(commit_wq, &journal->j_work, HZ/10); | |
3780 | ||
3781 | ||
3782 | /* if the next transaction has any chance of wrapping, flush | |
3783 | ** transactions that might get overwritten. If any journal lists are very | |
3784 | ** old flush them as well. | |
3785 | */ | |
3786 | first_jl: | |
3787 | list_for_each_safe(entry, safe, &journal->j_journal_list) { | |
3788 | temp_jl = JOURNAL_LIST_ENTRY(entry); | |
3789 | if (journal->j_start <= temp_jl->j_start) { | |
3790 | if ((journal->j_start + journal->j_trans_max + 1) >= | |
3791 | temp_jl->j_start) | |
3792 | { | |
3793 | flush_used_journal_lists(p_s_sb, temp_jl); | |
3794 | goto first_jl; | |
3795 | } else if ((journal->j_start + | |
3796 | journal->j_trans_max + 1) < | |
3797 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)) | |
3798 | { | |
3799 | /* if we don't cross into the next transaction and we don't | |
3800 | * wrap, there is no way we can overlap any later transactions | |
3801 | * break now | |
3802 | */ | |
3803 | break; | |
3804 | } | |
3805 | } else if ((journal->j_start + | |
3806 | journal->j_trans_max + 1) > | |
3807 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)) | |
3808 | { | |
3809 | if (((journal->j_start + journal->j_trans_max + 1) % | |
3810 | SB_ONDISK_JOURNAL_SIZE(p_s_sb)) >= temp_jl->j_start) | |
3811 | { | |
3812 | flush_used_journal_lists(p_s_sb, temp_jl); | |
3813 | goto first_jl; | |
3814 | } else { | |
3815 | /* we don't overlap anything from out start to the end of the | |
3816 | * log, and our wrapped portion doesn't overlap anything at | |
3817 | * the start of the log. We can break | |
3818 | */ | |
3819 | break; | |
3820 | } | |
3821 | } | |
3822 | } | |
3823 | flush_old_journal_lists(p_s_sb); | |
3824 | ||
3825 | journal->j_current_jl->j_list_bitmap = get_list_bitmap(p_s_sb, journal->j_current_jl) ; | |
3826 | ||
3827 | if (!(journal->j_current_jl->j_list_bitmap)) { | |
3828 | reiserfs_panic(p_s_sb, "journal-1996: do_journal_end, could not get a list bitmap\n") ; | |
3829 | } | |
3830 | ||
3831 | atomic_set(&(journal->j_jlock), 0) ; | |
3832 | unlock_journal(p_s_sb) ; | |
3833 | /* wake up any body waiting to join. */ | |
3834 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); | |
3835 | wake_up(&(journal->j_join_wait)) ; | |
3836 | ||
3837 | if (!flush && wait_on_commit && | |
3838 | journal_list_still_alive(p_s_sb, commit_trans_id)) { | |
3839 | flush_commit_list(p_s_sb, jl, 1) ; | |
3840 | } | |
3841 | out: | |
3842 | reiserfs_check_lock_depth(p_s_sb, "journal end2"); | |
3843 | ||
3844 | memset (th, 0, sizeof (*th)); | |
3845 | /* Re-set th->t_super, so we can properly keep track of how many | |
3846 | * persistent transactions there are. We need to do this so if this | |
3847 | * call is part of a failed restart_transaction, we can free it later */ | |
3848 | th->t_super = p_s_sb; | |
3849 | ||
3850 | return journal->j_errno; | |
3851 | } | |
3852 | ||
3853 | static void | |
3854 | __reiserfs_journal_abort_hard (struct super_block *sb) | |
3855 | { | |
3856 | struct reiserfs_journal *journal = SB_JOURNAL (sb); | |
3857 | if (test_bit (J_ABORTED, &journal->j_state)) | |
3858 | return; | |
3859 | ||
3860 | printk (KERN_CRIT "REISERFS: Aborting journal for filesystem on %s\n", | |
3861 | reiserfs_bdevname (sb)); | |
3862 | ||
3863 | sb->s_flags |= MS_RDONLY; | |
3864 | set_bit (J_ABORTED, &journal->j_state); | |
3865 | ||
3866 | #ifdef CONFIG_REISERFS_CHECK | |
3867 | dump_stack(); | |
3868 | #endif | |
3869 | } | |
3870 | ||
3871 | static void | |
3872 | __reiserfs_journal_abort_soft (struct super_block *sb, int errno) | |
3873 | { | |
3874 | struct reiserfs_journal *journal = SB_JOURNAL (sb); | |
3875 | if (test_bit (J_ABORTED, &journal->j_state)) | |
3876 | return; | |
3877 | ||
3878 | if (!journal->j_errno) | |
3879 | journal->j_errno = errno; | |
3880 | ||
3881 | __reiserfs_journal_abort_hard (sb); | |
3882 | } | |
3883 | ||
3884 | void | |
3885 | reiserfs_journal_abort (struct super_block *sb, int errno) | |
3886 | { | |
3887 | return __reiserfs_journal_abort_soft (sb, errno); | |
3888 | } |