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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
098297b2 JM |
3 | * Write ahead logging implementation copyright Chris Mason 2000 |
4 | * | |
5 | * The background commits make this code very interrelated, and | |
6 | * overly complex. I need to rethink things a bit....The major players: | |
7 | * | |
8 | * journal_begin -- call with the number of blocks you expect to log. | |
9 | * If the current transaction is too | |
10 | * old, it will block until the current transaction is | |
11 | * finished, and then start a new one. | |
12 | * Usually, your transaction will get joined in with | |
13 | * previous ones for speed. | |
14 | * | |
15 | * journal_join -- same as journal_begin, but won't block on the current | |
16 | * transaction regardless of age. Don't ever call | |
17 | * this. Ever. There are only two places it should be | |
18 | * called from, and they are both inside this file. | |
19 | * | |
20 | * journal_mark_dirty -- adds blocks into this transaction. clears any flags | |
21 | * that might make them get sent to disk | |
22 | * and then marks them BH_JDirty. Puts the buffer head | |
23 | * into the current transaction hash. | |
24 | * | |
25 | * journal_end -- if the current transaction is batchable, it does nothing | |
26 | * otherwise, it could do an async/synchronous commit, or | |
27 | * a full flush of all log and real blocks in the | |
28 | * transaction. | |
29 | * | |
30 | * flush_old_commits -- if the current transaction is too old, it is ended and | |
31 | * commit blocks are sent to disk. Forces commit blocks | |
32 | * to disk for all backgrounded commits that have been | |
33 | * around too long. | |
34 | * -- Note, if you call this as an immediate flush from | |
9436fb4d | 35 | * within kupdate, it will ignore the immediate flag |
098297b2 | 36 | */ |
1da177e4 | 37 | |
1da177e4 | 38 | #include <linux/time.h> |
6188e10d | 39 | #include <linux/semaphore.h> |
1da177e4 | 40 | #include <linux/vmalloc.h> |
f466c6fd | 41 | #include "reiserfs.h" |
1da177e4 LT |
42 | #include <linux/kernel.h> |
43 | #include <linux/errno.h> | |
44 | #include <linux/fcntl.h> | |
45 | #include <linux/stat.h> | |
46 | #include <linux/string.h> | |
1da177e4 LT |
47 | #include <linux/buffer_head.h> |
48 | #include <linux/workqueue.h> | |
49 | #include <linux/writeback.h> | |
50 | #include <linux/blkdev.h> | |
3fcfab16 | 51 | #include <linux/backing-dev.h> |
90415dea | 52 | #include <linux/uaccess.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
90415dea | 54 | |
1da177e4 | 55 | |
1da177e4 LT |
56 | /* gets a struct reiserfs_journal_list * from a list head */ |
57 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
58 | j_list)) | |
1da177e4 | 59 | |
098297b2 JM |
60 | /* must be correct to keep the desc and commit structs at 4k */ |
61 | #define JOURNAL_TRANS_HALF 1018 | |
bd4c625c | 62 | #define BUFNR 64 /*read ahead */ |
1da177e4 LT |
63 | |
64 | /* cnode stat bits. Move these into reiserfs_fs.h */ | |
65 | ||
098297b2 JM |
66 | /* this block was freed, and can't be written. */ |
67 | #define BLOCK_FREED 2 | |
68 | /* this block was freed during this transaction, and can't be written */ | |
69 | #define BLOCK_FREED_HOLDER 3 | |
1da177e4 | 70 | |
098297b2 JM |
71 | /* used in flush_journal_list */ |
72 | #define BLOCK_NEEDS_FLUSH 4 | |
1da177e4 LT |
73 | #define BLOCK_DIRTIED 5 |
74 | ||
1da177e4 LT |
75 | /* journal list state bits */ |
76 | #define LIST_TOUCHED 1 | |
77 | #define LIST_DIRTY 2 | |
bd4c625c | 78 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ |
1da177e4 LT |
79 | |
80 | /* flags for do_journal_end */ | |
81 | #define FLUSH_ALL 1 /* flush commit and real blocks */ | |
82 | #define COMMIT_NOW 2 /* end and commit this transaction */ | |
bd4c625c LT |
83 | #define WAIT 4 /* wait for the log blocks to hit the disk */ |
84 | ||
58d85426 | 85 | static int do_journal_end(struct reiserfs_transaction_handle *, int flags); |
bd4c625c LT |
86 | static int flush_journal_list(struct super_block *s, |
87 | struct reiserfs_journal_list *jl, int flushall); | |
88 | static int flush_commit_list(struct super_block *s, | |
89 | struct reiserfs_journal_list *jl, int flushall); | |
90 | static int can_dirty(struct reiserfs_journal_cnode *cn); | |
91 | static int journal_join(struct reiserfs_transaction_handle *th, | |
b491dd17 | 92 | struct super_block *sb); |
4385bab1 | 93 | static void release_journal_dev(struct super_block *super, |
bd4c625c | 94 | struct reiserfs_journal *journal); |
dc0dde61 | 95 | static void dirty_one_transaction(struct super_block *s, |
bd4c625c | 96 | struct reiserfs_journal_list *jl); |
c4028958 | 97 | static void flush_async_commits(struct work_struct *work); |
1da177e4 LT |
98 | static void queue_log_writer(struct super_block *s); |
99 | ||
100 | /* values for join in do_journal_begin_r */ | |
101 | enum { | |
bd4c625c | 102 | JBEGIN_REG = 0, /* regular journal begin */ |
098297b2 JM |
103 | /* join the running transaction if at all possible */ |
104 | JBEGIN_JOIN = 1, | |
105 | /* called from cleanup code, ignores aborted flag */ | |
106 | JBEGIN_ABORT = 2, | |
1da177e4 LT |
107 | }; |
108 | ||
109 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 110 | struct super_block *sb, |
bd4c625c | 111 | unsigned long nblocks, int join); |
1da177e4 | 112 | |
a9dd3643 | 113 | static void init_journal_hash(struct super_block *sb) |
bd4c625c | 114 | { |
a9dd3643 | 115 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
116 | memset(journal->j_hash_table, 0, |
117 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
1da177e4 LT |
118 | } |
119 | ||
120 | /* | |
098297b2 JM |
121 | * clears BH_Dirty and sticks the buffer on the clean list. Called because |
122 | * I can't allow refile_buffer to make schedule happen after I've freed a | |
123 | * block. Look at remove_from_transaction and journal_mark_freed for | |
124 | * more details. | |
125 | */ | |
bd4c625c LT |
126 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) |
127 | { | |
128 | if (bh) { | |
129 | clear_buffer_dirty(bh); | |
130 | clear_buffer_journal_test(bh); | |
131 | } | |
132 | return 0; | |
1da177e4 LT |
133 | } |
134 | ||
bd4c625c | 135 | static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block |
a9dd3643 | 136 | *sb) |
bd4c625c LT |
137 | { |
138 | struct reiserfs_bitmap_node *bn; | |
139 | static int id; | |
140 | ||
d739b42b | 141 | bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); |
bd4c625c LT |
142 | if (!bn) { |
143 | return NULL; | |
144 | } | |
a9dd3643 | 145 | bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); |
bd4c625c | 146 | if (!bn->data) { |
d739b42b | 147 | kfree(bn); |
bd4c625c LT |
148 | return NULL; |
149 | } | |
150 | bn->id = id++; | |
bd4c625c LT |
151 | INIT_LIST_HEAD(&bn->list); |
152 | return bn; | |
153 | } | |
154 | ||
a9dd3643 | 155 | static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) |
bd4c625c | 156 | { |
a9dd3643 | 157 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
158 | struct reiserfs_bitmap_node *bn = NULL; |
159 | struct list_head *entry = journal->j_bitmap_nodes.next; | |
160 | ||
161 | journal->j_used_bitmap_nodes++; | |
cf776a7a | 162 | repeat: |
bd4c625c LT |
163 | |
164 | if (entry != &journal->j_bitmap_nodes) { | |
165 | bn = list_entry(entry, struct reiserfs_bitmap_node, list); | |
166 | list_del(entry); | |
a9dd3643 | 167 | memset(bn->data, 0, sb->s_blocksize); |
bd4c625c LT |
168 | journal->j_free_bitmap_nodes--; |
169 | return bn; | |
170 | } | |
a9dd3643 | 171 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
172 | if (!bn) { |
173 | yield(); | |
174 | goto repeat; | |
175 | } | |
176 | return bn; | |
1da177e4 | 177 | } |
a9dd3643 | 178 | static inline void free_bitmap_node(struct super_block *sb, |
bd4c625c LT |
179 | struct reiserfs_bitmap_node *bn) |
180 | { | |
a9dd3643 | 181 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
182 | journal->j_used_bitmap_nodes--; |
183 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { | |
d739b42b PE |
184 | kfree(bn->data); |
185 | kfree(bn); | |
bd4c625c LT |
186 | } else { |
187 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
188 | journal->j_free_bitmap_nodes++; | |
189 | } | |
190 | } | |
191 | ||
a9dd3643 | 192 | static void allocate_bitmap_nodes(struct super_block *sb) |
bd4c625c LT |
193 | { |
194 | int i; | |
a9dd3643 | 195 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
196 | struct reiserfs_bitmap_node *bn = NULL; |
197 | for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { | |
a9dd3643 | 198 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
199 | if (bn) { |
200 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
201 | journal->j_free_bitmap_nodes++; | |
202 | } else { | |
098297b2 JM |
203 | /* this is ok, we'll try again when more are needed */ |
204 | break; | |
bd4c625c LT |
205 | } |
206 | } | |
1da177e4 LT |
207 | } |
208 | ||
a9dd3643 | 209 | static int set_bit_in_list_bitmap(struct super_block *sb, |
3ee16670 | 210 | b_blocknr_t block, |
bd4c625c LT |
211 | struct reiserfs_list_bitmap *jb) |
212 | { | |
a9dd3643 JM |
213 | unsigned int bmap_nr = block / (sb->s_blocksize << 3); |
214 | unsigned int bit_nr = block % (sb->s_blocksize << 3); | |
1da177e4 | 215 | |
bd4c625c | 216 | if (!jb->bitmaps[bmap_nr]) { |
a9dd3643 | 217 | jb->bitmaps[bmap_nr] = get_bitmap_node(sb); |
bd4c625c LT |
218 | } |
219 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); | |
220 | return 0; | |
1da177e4 LT |
221 | } |
222 | ||
a9dd3643 | 223 | static void cleanup_bitmap_list(struct super_block *sb, |
bd4c625c LT |
224 | struct reiserfs_list_bitmap *jb) |
225 | { | |
226 | int i; | |
227 | if (jb->bitmaps == NULL) | |
228 | return; | |
229 | ||
a9dd3643 | 230 | for (i = 0; i < reiserfs_bmap_count(sb); i++) { |
bd4c625c | 231 | if (jb->bitmaps[i]) { |
a9dd3643 | 232 | free_bitmap_node(sb, jb->bitmaps[i]); |
bd4c625c LT |
233 | jb->bitmaps[i] = NULL; |
234 | } | |
235 | } | |
1da177e4 LT |
236 | } |
237 | ||
238 | /* | |
098297b2 JM |
239 | * only call this on FS unmount. |
240 | */ | |
a9dd3643 | 241 | static int free_list_bitmaps(struct super_block *sb, |
bd4c625c LT |
242 | struct reiserfs_list_bitmap *jb_array) |
243 | { | |
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; | |
a9dd3643 | 249 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
250 | vfree(jb->bitmaps); |
251 | jb->bitmaps = NULL; | |
252 | } | |
253 | return 0; | |
254 | } | |
255 | ||
a9dd3643 | 256 | static int free_bitmap_nodes(struct super_block *sb) |
bd4c625c | 257 | { |
a9dd3643 | 258 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
259 | struct list_head *next = journal->j_bitmap_nodes.next; |
260 | struct reiserfs_bitmap_node *bn; | |
261 | ||
262 | while (next != &journal->j_bitmap_nodes) { | |
263 | bn = list_entry(next, struct reiserfs_bitmap_node, list); | |
264 | list_del(next); | |
d739b42b PE |
265 | kfree(bn->data); |
266 | kfree(bn); | |
bd4c625c LT |
267 | next = journal->j_bitmap_nodes.next; |
268 | journal->j_free_bitmap_nodes--; | |
269 | } | |
270 | ||
271 | return 0; | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* | |
098297b2 JM |
275 | * get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. |
276 | * jb_array is the array to be filled in. | |
277 | */ | |
a9dd3643 | 278 | int reiserfs_allocate_list_bitmaps(struct super_block *sb, |
bd4c625c | 279 | struct reiserfs_list_bitmap *jb_array, |
3ee16670 | 280 | unsigned int bmap_nr) |
bd4c625c LT |
281 | { |
282 | int i; | |
283 | int failed = 0; | |
284 | struct reiserfs_list_bitmap *jb; | |
285 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); | |
286 | ||
287 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
288 | jb = jb_array + i; | |
289 | jb->journal_list = NULL; | |
558feb08 | 290 | jb->bitmaps = vzalloc(mem); |
bd4c625c | 291 | if (!jb->bitmaps) { |
a9dd3643 | 292 | reiserfs_warning(sb, "clm-2000", "unable to " |
45b03d5e | 293 | "allocate bitmaps for journal lists"); |
bd4c625c LT |
294 | failed = 1; |
295 | break; | |
296 | } | |
bd4c625c LT |
297 | } |
298 | if (failed) { | |
a9dd3643 | 299 | free_list_bitmaps(sb, jb_array); |
bd4c625c LT |
300 | return -1; |
301 | } | |
302 | return 0; | |
1da177e4 LT |
303 | } |
304 | ||
305 | /* | |
098297b2 JM |
306 | * find an available list bitmap. If you can't find one, flush a commit list |
307 | * and try again | |
308 | */ | |
a9dd3643 | 309 | static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, |
bd4c625c LT |
310 | struct reiserfs_journal_list |
311 | *jl) | |
312 | { | |
313 | int i, j; | |
a9dd3643 | 314 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
315 | struct reiserfs_list_bitmap *jb = NULL; |
316 | ||
317 | for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { | |
318 | i = journal->j_list_bitmap_index; | |
319 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; | |
320 | jb = journal->j_list_bitmap + i; | |
321 | if (journal->j_list_bitmap[i].journal_list) { | |
a9dd3643 | 322 | flush_commit_list(sb, |
bd4c625c LT |
323 | journal->j_list_bitmap[i]. |
324 | journal_list, 1); | |
325 | if (!journal->j_list_bitmap[i].journal_list) { | |
326 | break; | |
327 | } | |
328 | } else { | |
329 | break; | |
330 | } | |
331 | } | |
098297b2 JM |
332 | /* double check to make sure if flushed correctly */ |
333 | if (jb->journal_list) | |
bd4c625c | 334 | return NULL; |
bd4c625c LT |
335 | jb->journal_list = jl; |
336 | return jb; | |
1da177e4 LT |
337 | } |
338 | ||
0222e657 | 339 | /* |
098297b2 JM |
340 | * allocates a new chunk of X nodes, and links them all together as a list. |
341 | * Uses the cnode->next and cnode->prev pointers | |
342 | * returns NULL on failure | |
343 | */ | |
bd4c625c LT |
344 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) |
345 | { | |
346 | struct reiserfs_journal_cnode *head; | |
347 | int i; | |
348 | if (num_cnodes <= 0) { | |
349 | return NULL; | |
350 | } | |
fad953ce KC |
351 | head = vzalloc(array_size(num_cnodes, |
352 | sizeof(struct reiserfs_journal_cnode))); | |
bd4c625c LT |
353 | if (!head) { |
354 | return NULL; | |
355 | } | |
bd4c625c LT |
356 | head[0].prev = NULL; |
357 | head[0].next = head + 1; | |
358 | for (i = 1; i < num_cnodes; i++) { | |
359 | head[i].prev = head + (i - 1); | |
360 | head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ | |
361 | } | |
362 | head[num_cnodes - 1].next = NULL; | |
363 | return head; | |
1da177e4 LT |
364 | } |
365 | ||
098297b2 | 366 | /* pulls a cnode off the free list, or returns NULL on failure */ |
a9dd3643 | 367 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) |
bd4c625c LT |
368 | { |
369 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 370 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 371 | |
a9dd3643 | 372 | reiserfs_check_lock_depth(sb, "get_cnode"); |
bd4c625c LT |
373 | |
374 | if (journal->j_cnode_free <= 0) { | |
375 | return NULL; | |
376 | } | |
377 | journal->j_cnode_used++; | |
378 | journal->j_cnode_free--; | |
379 | cn = journal->j_cnode_free_list; | |
380 | if (!cn) { | |
381 | return cn; | |
382 | } | |
383 | if (cn->next) { | |
384 | cn->next->prev = NULL; | |
385 | } | |
386 | journal->j_cnode_free_list = cn->next; | |
387 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); | |
388 | return cn; | |
1da177e4 LT |
389 | } |
390 | ||
391 | /* | |
098297b2 JM |
392 | * returns a cnode to the free list |
393 | */ | |
a9dd3643 | 394 | static void free_cnode(struct super_block *sb, |
bd4c625c LT |
395 | struct reiserfs_journal_cnode *cn) |
396 | { | |
a9dd3643 | 397 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 398 | |
a9dd3643 | 399 | reiserfs_check_lock_depth(sb, "free_cnode"); |
1da177e4 | 400 | |
bd4c625c LT |
401 | journal->j_cnode_used--; |
402 | journal->j_cnode_free++; | |
403 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ | |
404 | cn->next = journal->j_cnode_free_list; | |
405 | if (journal->j_cnode_free_list) { | |
406 | journal->j_cnode_free_list->prev = cn; | |
407 | } | |
408 | cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ | |
409 | journal->j_cnode_free_list = cn; | |
1da177e4 LT |
410 | } |
411 | ||
bd4c625c LT |
412 | static void clear_prepared_bits(struct buffer_head *bh) |
413 | { | |
414 | clear_buffer_journal_prepared(bh); | |
415 | clear_buffer_journal_restore_dirty(bh); | |
1da177e4 LT |
416 | } |
417 | ||
098297b2 JM |
418 | /* |
419 | * return a cnode with same dev, block number and size in table, | |
420 | * or null if not found | |
421 | */ | |
bd4c625c LT |
422 | static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct |
423 | super_block | |
424 | *sb, | |
425 | struct | |
426 | reiserfs_journal_cnode | |
427 | **table, | |
428 | long bl) | |
1da177e4 | 429 | { |
bd4c625c LT |
430 | struct reiserfs_journal_cnode *cn; |
431 | cn = journal_hash(table, sb, bl); | |
432 | while (cn) { | |
433 | if (cn->blocknr == bl && cn->sb == sb) | |
434 | return cn; | |
435 | cn = cn->hnext; | |
436 | } | |
437 | return (struct reiserfs_journal_cnode *)0; | |
1da177e4 LT |
438 | } |
439 | ||
440 | /* | |
098297b2 JM |
441 | * this actually means 'can this block be reallocated yet?'. If you set |
442 | * search_all, a block can only be allocated if it is not in the current | |
443 | * transaction, was not freed by the current transaction, and has no chance | |
444 | * of ever being overwritten by a replay after crashing. | |
445 | * | |
446 | * If you don't set search_all, a block can only be allocated if it is not | |
447 | * in the current transaction. Since deleting a block removes it from the | |
448 | * current transaction, this case should never happen. If you don't set | |
449 | * search_all, make sure you never write the block without logging it. | |
450 | * | |
451 | * next_zero_bit is a suggestion about the next block to try for find_forward. | |
452 | * when bl is rejected because it is set in a journal list bitmap, we search | |
453 | * for the next zero bit in the bitmap that rejected bl. Then, we return | |
454 | * that through next_zero_bit for find_forward to try. | |
455 | * | |
456 | * Just because we return something in next_zero_bit does not mean we won't | |
457 | * reject it on the next call to reiserfs_in_journal | |
458 | */ | |
a9dd3643 | 459 | int reiserfs_in_journal(struct super_block *sb, |
3ee16670 | 460 | unsigned int bmap_nr, int bit_nr, int search_all, |
bd4c625c LT |
461 | b_blocknr_t * next_zero_bit) |
462 | { | |
a9dd3643 | 463 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
464 | struct reiserfs_list_bitmap *jb; |
465 | int i; | |
466 | unsigned long bl; | |
467 | ||
468 | *next_zero_bit = 0; /* always start this at zero. */ | |
469 | ||
a9dd3643 | 470 | PROC_INFO_INC(sb, journal.in_journal); |
098297b2 JM |
471 | /* |
472 | * If we aren't doing a search_all, this is a metablock, and it | |
473 | * will be logged before use. if we crash before the transaction | |
474 | * that freed it commits, this transaction won't have committed | |
475 | * either, and the block will never be written | |
bd4c625c LT |
476 | */ |
477 | if (search_all) { | |
478 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
a9dd3643 | 479 | PROC_INFO_INC(sb, journal.in_journal_bitmap); |
bd4c625c LT |
480 | jb = journal->j_list_bitmap + i; |
481 | if (jb->journal_list && jb->bitmaps[bmap_nr] && | |
482 | test_bit(bit_nr, | |
483 | (unsigned long *)jb->bitmaps[bmap_nr]-> | |
484 | data)) { | |
485 | *next_zero_bit = | |
486 | find_next_zero_bit((unsigned long *) | |
487 | (jb->bitmaps[bmap_nr]-> | |
488 | data), | |
a9dd3643 | 489 | sb->s_blocksize << 3, |
bd4c625c LT |
490 | bit_nr + 1); |
491 | return 1; | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
a9dd3643 | 496 | bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; |
bd4c625c LT |
497 | /* is it in any old transactions? */ |
498 | if (search_all | |
a3cc754a | 499 | && (get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { |
bd4c625c LT |
500 | return 1; |
501 | } | |
502 | ||
503 | /* is it in the current transaction. This should never happen */ | |
a3cc754a | 504 | if ((get_journal_hash_dev(sb, journal->j_hash_table, bl))) { |
bd4c625c LT |
505 | BUG(); |
506 | return 1; | |
507 | } | |
508 | ||
a9dd3643 | 509 | PROC_INFO_INC(sb, journal.in_journal_reusable); |
bd4c625c LT |
510 | /* safe for reuse */ |
511 | return 0; | |
1da177e4 LT |
512 | } |
513 | ||
098297b2 | 514 | /* insert cn into table */ |
bd4c625c LT |
515 | static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, |
516 | struct reiserfs_journal_cnode *cn) | |
517 | { | |
518 | struct reiserfs_journal_cnode *cn_orig; | |
1da177e4 | 519 | |
bd4c625c LT |
520 | cn_orig = journal_hash(table, cn->sb, cn->blocknr); |
521 | cn->hnext = cn_orig; | |
522 | cn->hprev = NULL; | |
523 | if (cn_orig) { | |
524 | cn_orig->hprev = cn; | |
525 | } | |
526 | journal_hash(table, cn->sb, cn->blocknr) = cn; | |
1da177e4 LT |
527 | } |
528 | ||
529 | /* lock the current transaction */ | |
a9dd3643 | 530 | static inline void lock_journal(struct super_block *sb) |
bd4c625c | 531 | { |
a9dd3643 | 532 | PROC_INFO_INC(sb, journal.lock_journal); |
8ebc4232 FW |
533 | |
534 | reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb); | |
1da177e4 LT |
535 | } |
536 | ||
537 | /* unlock the current transaction */ | |
a9dd3643 | 538 | static inline void unlock_journal(struct super_block *sb) |
bd4c625c | 539 | { |
a9dd3643 | 540 | mutex_unlock(&SB_JOURNAL(sb)->j_mutex); |
1da177e4 LT |
541 | } |
542 | ||
543 | static inline void get_journal_list(struct reiserfs_journal_list *jl) | |
544 | { | |
bd4c625c | 545 | jl->j_refcount++; |
1da177e4 LT |
546 | } |
547 | ||
548 | static inline void put_journal_list(struct super_block *s, | |
bd4c625c | 549 | struct reiserfs_journal_list *jl) |
1da177e4 | 550 | { |
bd4c625c | 551 | if (jl->j_refcount < 1) { |
c3a9c210 | 552 | reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d", |
bd4c625c LT |
553 | jl->j_trans_id, jl->j_refcount); |
554 | } | |
555 | if (--jl->j_refcount == 0) | |
d739b42b | 556 | kfree(jl); |
1da177e4 LT |
557 | } |
558 | ||
559 | /* | |
098297b2 JM |
560 | * this used to be much more involved, and I'm keeping it just in case |
561 | * things get ugly again. it gets called by flush_commit_list, and | |
562 | * cleans up any data stored about blocks freed during a transaction. | |
563 | */ | |
a9dd3643 | 564 | static void cleanup_freed_for_journal_list(struct super_block *sb, |
bd4c625c LT |
565 | struct reiserfs_journal_list *jl) |
566 | { | |
1da177e4 | 567 | |
bd4c625c LT |
568 | struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; |
569 | if (jb) { | |
a9dd3643 | 570 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
571 | } |
572 | jl->j_list_bitmap->journal_list = NULL; | |
573 | jl->j_list_bitmap = NULL; | |
1da177e4 LT |
574 | } |
575 | ||
576 | static int journal_list_still_alive(struct super_block *s, | |
600ed416 | 577 | unsigned int trans_id) |
bd4c625c LT |
578 | { |
579 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
580 | struct list_head *entry = &journal->j_journal_list; | |
581 | struct reiserfs_journal_list *jl; | |
582 | ||
583 | if (!list_empty(entry)) { | |
584 | jl = JOURNAL_LIST_ENTRY(entry->next); | |
585 | if (jl->j_trans_id <= trans_id) { | |
586 | return 1; | |
587 | } | |
588 | } | |
589 | return 0; | |
590 | } | |
591 | ||
398c95bd CM |
592 | /* |
593 | * If page->mapping was null, we failed to truncate this page for | |
594 | * some reason. Most likely because it was truncated after being | |
595 | * logged via data=journal. | |
596 | * | |
597 | * This does a check to see if the buffer belongs to one of these | |
598 | * lost pages before doing the final put_bh. If page->mapping was | |
599 | * null, it tries to free buffers on the page, which should make the | |
ea1754a0 | 600 | * final put_page drop the page from the lru. |
398c95bd CM |
601 | */ |
602 | static void release_buffer_page(struct buffer_head *bh) | |
603 | { | |
604 | struct page *page = bh->b_page; | |
529ae9aa | 605 | if (!page->mapping && trylock_page(page)) { |
09cbfeaf | 606 | get_page(page); |
398c95bd CM |
607 | put_bh(bh); |
608 | if (!page->mapping) | |
609 | try_to_free_buffers(page); | |
610 | unlock_page(page); | |
09cbfeaf | 611 | put_page(page); |
398c95bd CM |
612 | } else { |
613 | put_bh(bh); | |
614 | } | |
615 | } | |
616 | ||
bd4c625c LT |
617 | static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) |
618 | { | |
bd4c625c | 619 | if (buffer_journaled(bh)) { |
45b03d5e | 620 | reiserfs_warning(NULL, "clm-2084", |
a1c6f057 DM |
621 | "pinned buffer %lu:%pg sent to disk", |
622 | bh->b_blocknr, bh->b_bdev); | |
bd4c625c LT |
623 | } |
624 | if (uptodate) | |
625 | set_buffer_uptodate(bh); | |
626 | else | |
627 | clear_buffer_uptodate(bh); | |
398c95bd | 628 | |
bd4c625c | 629 | unlock_buffer(bh); |
398c95bd | 630 | release_buffer_page(bh); |
bd4c625c LT |
631 | } |
632 | ||
633 | static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) | |
634 | { | |
635 | if (uptodate) | |
636 | set_buffer_uptodate(bh); | |
637 | else | |
638 | clear_buffer_uptodate(bh); | |
639 | unlock_buffer(bh); | |
640 | put_bh(bh); | |
641 | } | |
642 | ||
643 | static void submit_logged_buffer(struct buffer_head *bh) | |
644 | { | |
645 | get_bh(bh); | |
646 | bh->b_end_io = reiserfs_end_buffer_io_sync; | |
647 | clear_buffer_journal_new(bh); | |
648 | clear_buffer_dirty(bh); | |
649 | if (!test_clear_buffer_journal_test(bh)) | |
650 | BUG(); | |
651 | if (!buffer_uptodate(bh)) | |
652 | BUG(); | |
2a222ca9 | 653 | submit_bh(REQ_OP_WRITE, 0, bh); |
bd4c625c LT |
654 | } |
655 | ||
656 | static void submit_ordered_buffer(struct buffer_head *bh) | |
657 | { | |
658 | get_bh(bh); | |
659 | bh->b_end_io = reiserfs_end_ordered_io; | |
660 | clear_buffer_dirty(bh); | |
661 | if (!buffer_uptodate(bh)) | |
662 | BUG(); | |
2a222ca9 | 663 | submit_bh(REQ_OP_WRITE, 0, bh); |
bd4c625c LT |
664 | } |
665 | ||
1da177e4 LT |
666 | #define CHUNK_SIZE 32 |
667 | struct buffer_chunk { | |
bd4c625c LT |
668 | struct buffer_head *bh[CHUNK_SIZE]; |
669 | int nr; | |
1da177e4 LT |
670 | }; |
671 | ||
bd4c625c LT |
672 | static void write_chunk(struct buffer_chunk *chunk) |
673 | { | |
674 | int i; | |
bd4c625c LT |
675 | for (i = 0; i < chunk->nr; i++) { |
676 | submit_logged_buffer(chunk->bh[i]); | |
677 | } | |
678 | chunk->nr = 0; | |
1da177e4 LT |
679 | } |
680 | ||
bd4c625c LT |
681 | static void write_ordered_chunk(struct buffer_chunk *chunk) |
682 | { | |
683 | int i; | |
bd4c625c LT |
684 | for (i = 0; i < chunk->nr; i++) { |
685 | submit_ordered_buffer(chunk->bh[i]); | |
686 | } | |
687 | chunk->nr = 0; | |
1da177e4 LT |
688 | } |
689 | ||
690 | static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, | |
bd4c625c | 691 | spinlock_t * lock, void (fn) (struct buffer_chunk *)) |
1da177e4 | 692 | { |
bd4c625c | 693 | int ret = 0; |
14a61442 | 694 | BUG_ON(chunk->nr >= CHUNK_SIZE); |
bd4c625c LT |
695 | chunk->bh[chunk->nr++] = bh; |
696 | if (chunk->nr >= CHUNK_SIZE) { | |
697 | ret = 1; | |
54cc6cea | 698 | if (lock) { |
bd4c625c | 699 | spin_unlock(lock); |
54cc6cea | 700 | fn(chunk); |
bd4c625c | 701 | spin_lock(lock); |
54cc6cea FF |
702 | } else { |
703 | fn(chunk); | |
704 | } | |
bd4c625c LT |
705 | } |
706 | return ret; | |
1da177e4 LT |
707 | } |
708 | ||
1da177e4 | 709 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); |
bd4c625c LT |
710 | static struct reiserfs_jh *alloc_jh(void) |
711 | { | |
712 | struct reiserfs_jh *jh; | |
713 | while (1) { | |
714 | jh = kmalloc(sizeof(*jh), GFP_NOFS); | |
715 | if (jh) { | |
716 | atomic_inc(&nr_reiserfs_jh); | |
717 | return jh; | |
718 | } | |
719 | yield(); | |
1da177e4 | 720 | } |
1da177e4 LT |
721 | } |
722 | ||
723 | /* | |
724 | * we want to free the jh when the buffer has been written | |
725 | * and waited on | |
726 | */ | |
bd4c625c LT |
727 | void reiserfs_free_jh(struct buffer_head *bh) |
728 | { | |
729 | struct reiserfs_jh *jh; | |
730 | ||
731 | jh = bh->b_private; | |
732 | if (jh) { | |
733 | bh->b_private = NULL; | |
734 | jh->bh = NULL; | |
735 | list_del_init(&jh->list); | |
736 | kfree(jh); | |
737 | if (atomic_read(&nr_reiserfs_jh) <= 0) | |
738 | BUG(); | |
739 | atomic_dec(&nr_reiserfs_jh); | |
740 | put_bh(bh); | |
741 | } | |
1da177e4 LT |
742 | } |
743 | ||
744 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, | |
bd4c625c | 745 | int tail) |
1da177e4 | 746 | { |
bd4c625c | 747 | struct reiserfs_jh *jh; |
1da177e4 | 748 | |
bd4c625c LT |
749 | if (bh->b_private) { |
750 | spin_lock(&j->j_dirty_buffers_lock); | |
751 | if (!bh->b_private) { | |
752 | spin_unlock(&j->j_dirty_buffers_lock); | |
753 | goto no_jh; | |
754 | } | |
755 | jh = bh->b_private; | |
756 | list_del_init(&jh->list); | |
757 | } else { | |
cf776a7a | 758 | no_jh: |
bd4c625c LT |
759 | get_bh(bh); |
760 | jh = alloc_jh(); | |
761 | spin_lock(&j->j_dirty_buffers_lock); | |
098297b2 JM |
762 | /* |
763 | * buffer must be locked for __add_jh, should be able to have | |
bd4c625c LT |
764 | * two adds at the same time |
765 | */ | |
14a61442 | 766 | BUG_ON(bh->b_private); |
bd4c625c LT |
767 | jh->bh = bh; |
768 | bh->b_private = jh; | |
1da177e4 | 769 | } |
bd4c625c LT |
770 | jh->jl = j->j_current_jl; |
771 | if (tail) | |
772 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); | |
773 | else { | |
774 | list_add_tail(&jh->list, &jh->jl->j_bh_list); | |
775 | } | |
776 | spin_unlock(&j->j_dirty_buffers_lock); | |
777 | return 0; | |
1da177e4 LT |
778 | } |
779 | ||
bd4c625c LT |
780 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) |
781 | { | |
782 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); | |
1da177e4 | 783 | } |
bd4c625c LT |
784 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) |
785 | { | |
786 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); | |
1da177e4 LT |
787 | } |
788 | ||
789 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) | |
bd4c625c | 790 | static int write_ordered_buffers(spinlock_t * lock, |
1da177e4 | 791 | struct reiserfs_journal *j, |
bd4c625c | 792 | struct reiserfs_journal_list *jl, |
1da177e4 LT |
793 | struct list_head *list) |
794 | { | |
bd4c625c LT |
795 | struct buffer_head *bh; |
796 | struct reiserfs_jh *jh; | |
797 | int ret = j->j_errno; | |
798 | struct buffer_chunk chunk; | |
799 | struct list_head tmp; | |
800 | INIT_LIST_HEAD(&tmp); | |
801 | ||
802 | chunk.nr = 0; | |
803 | spin_lock(lock); | |
804 | while (!list_empty(list)) { | |
805 | jh = JH_ENTRY(list->next); | |
806 | bh = jh->bh; | |
807 | get_bh(bh); | |
ca5de404 | 808 | if (!trylock_buffer(bh)) { |
bd4c625c | 809 | if (!buffer_dirty(bh)) { |
f116629d | 810 | list_move(&jh->list, &tmp); |
bd4c625c LT |
811 | goto loop_next; |
812 | } | |
813 | spin_unlock(lock); | |
814 | if (chunk.nr) | |
815 | write_ordered_chunk(&chunk); | |
816 | wait_on_buffer(bh); | |
817 | cond_resched(); | |
818 | spin_lock(lock); | |
819 | goto loop_next; | |
820 | } | |
098297b2 JM |
821 | /* |
822 | * in theory, dirty non-uptodate buffers should never get here, | |
3d4492f8 CM |
823 | * but the upper layer io error paths still have a few quirks. |
824 | * Handle them here as gracefully as we can | |
825 | */ | |
826 | if (!buffer_uptodate(bh) && buffer_dirty(bh)) { | |
827 | clear_buffer_dirty(bh); | |
828 | ret = -EIO; | |
829 | } | |
bd4c625c | 830 | if (buffer_dirty(bh)) { |
f116629d | 831 | list_move(&jh->list, &tmp); |
bd4c625c LT |
832 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); |
833 | } else { | |
834 | reiserfs_free_jh(bh); | |
835 | unlock_buffer(bh); | |
836 | } | |
cf776a7a | 837 | loop_next: |
bd4c625c LT |
838 | put_bh(bh); |
839 | cond_resched_lock(lock); | |
840 | } | |
841 | if (chunk.nr) { | |
842 | spin_unlock(lock); | |
1da177e4 | 843 | write_ordered_chunk(&chunk); |
bd4c625c | 844 | spin_lock(lock); |
1da177e4 | 845 | } |
bd4c625c LT |
846 | while (!list_empty(&tmp)) { |
847 | jh = JH_ENTRY(tmp.prev); | |
848 | bh = jh->bh; | |
849 | get_bh(bh); | |
850 | reiserfs_free_jh(bh); | |
851 | ||
852 | if (buffer_locked(bh)) { | |
853 | spin_unlock(lock); | |
854 | wait_on_buffer(bh); | |
855 | spin_lock(lock); | |
856 | } | |
857 | if (!buffer_uptodate(bh)) { | |
858 | ret = -EIO; | |
859 | } | |
098297b2 JM |
860 | /* |
861 | * ugly interaction with invalidatepage here. | |
862 | * reiserfs_invalidate_page will pin any buffer that has a | |
863 | * valid journal head from an older transaction. If someone | |
864 | * else sets our buffer dirty after we write it in the first | |
865 | * loop, and then someone truncates the page away, nobody | |
866 | * will ever write the buffer. We're safe if we write the | |
867 | * page one last time after freeing the journal header. | |
d62b1b87 CM |
868 | */ |
869 | if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { | |
870 | spin_unlock(lock); | |
dfec8a14 | 871 | ll_rw_block(REQ_OP_WRITE, 0, 1, &bh); |
d62b1b87 CM |
872 | spin_lock(lock); |
873 | } | |
bd4c625c LT |
874 | put_bh(bh); |
875 | cond_resched_lock(lock); | |
1da177e4 | 876 | } |
bd4c625c LT |
877 | spin_unlock(lock); |
878 | return ret; | |
879 | } | |
1da177e4 | 880 | |
bd4c625c LT |
881 | static int flush_older_commits(struct super_block *s, |
882 | struct reiserfs_journal_list *jl) | |
883 | { | |
884 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
885 | struct reiserfs_journal_list *other_jl; | |
886 | struct reiserfs_journal_list *first_jl; | |
887 | struct list_head *entry; | |
600ed416 JM |
888 | unsigned int trans_id = jl->j_trans_id; |
889 | unsigned int other_trans_id; | |
bd4c625c | 890 | |
cf776a7a | 891 | find_first: |
bd4c625c LT |
892 | /* |
893 | * first we walk backwards to find the oldest uncommitted transation | |
894 | */ | |
895 | first_jl = jl; | |
896 | entry = jl->j_list.prev; | |
897 | while (1) { | |
898 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
899 | if (entry == &journal->j_journal_list || | |
900 | atomic_read(&other_jl->j_older_commits_done)) | |
901 | break; | |
1da177e4 | 902 | |
bd4c625c LT |
903 | first_jl = other_jl; |
904 | entry = other_jl->j_list.prev; | |
905 | } | |
1da177e4 | 906 | |
bd4c625c LT |
907 | /* if we didn't find any older uncommitted transactions, return now */ |
908 | if (first_jl == jl) { | |
909 | return 0; | |
910 | } | |
1da177e4 | 911 | |
bd4c625c LT |
912 | entry = &first_jl->j_list; |
913 | while (1) { | |
914 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
915 | other_trans_id = other_jl->j_trans_id; | |
916 | ||
917 | if (other_trans_id < trans_id) { | |
918 | if (atomic_read(&other_jl->j_commit_left) != 0) { | |
919 | flush_commit_list(s, other_jl, 0); | |
920 | ||
921 | /* list we were called with is gone, return */ | |
922 | if (!journal_list_still_alive(s, trans_id)) | |
923 | return 1; | |
924 | ||
098297b2 JM |
925 | /* |
926 | * the one we just flushed is gone, this means | |
927 | * all older lists are also gone, so first_jl | |
928 | * is no longer valid either. Go back to the | |
929 | * beginning. | |
bd4c625c LT |
930 | */ |
931 | if (!journal_list_still_alive | |
932 | (s, other_trans_id)) { | |
933 | goto find_first; | |
934 | } | |
935 | } | |
936 | entry = entry->next; | |
937 | if (entry == &journal->j_journal_list) | |
938 | return 0; | |
939 | } else { | |
940 | return 0; | |
1da177e4 | 941 | } |
1da177e4 | 942 | } |
bd4c625c | 943 | return 0; |
1da177e4 | 944 | } |
deba0f49 AB |
945 | |
946 | static int reiserfs_async_progress_wait(struct super_block *s) | |
bd4c625c | 947 | { |
bd4c625c | 948 | struct reiserfs_journal *j = SB_JOURNAL(s); |
8ebc4232 FW |
949 | |
950 | if (atomic_read(&j->j_async_throttle)) { | |
278f6679 JM |
951 | int depth; |
952 | ||
953 | depth = reiserfs_write_unlock_nested(s); | |
8aa7e847 | 954 | congestion_wait(BLK_RW_ASYNC, HZ / 10); |
278f6679 | 955 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 FW |
956 | } |
957 | ||
bd4c625c | 958 | return 0; |
1da177e4 LT |
959 | } |
960 | ||
961 | /* | |
098297b2 JM |
962 | * if this journal list still has commit blocks unflushed, send them to disk. |
963 | * | |
964 | * log areas must be flushed in order (transaction 2 can't commit before | |
965 | * transaction 1) Before the commit block can by written, every other log | |
966 | * block must be safely on disk | |
967 | */ | |
bd4c625c LT |
968 | static int flush_commit_list(struct super_block *s, |
969 | struct reiserfs_journal_list *jl, int flushall) | |
970 | { | |
971 | int i; | |
3ee16670 | 972 | b_blocknr_t bn; |
bd4c625c | 973 | struct buffer_head *tbh = NULL; |
600ed416 | 974 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 975 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
bd4c625c | 976 | int retval = 0; |
e0e851cf | 977 | int write_len; |
278f6679 | 978 | int depth; |
bd4c625c LT |
979 | |
980 | reiserfs_check_lock_depth(s, "flush_commit_list"); | |
981 | ||
982 | if (atomic_read(&jl->j_older_commits_done)) { | |
983 | return 0; | |
984 | } | |
985 | ||
098297b2 JM |
986 | /* |
987 | * before we can put our commit blocks on disk, we have to make | |
988 | * sure everyone older than us is on disk too | |
bd4c625c LT |
989 | */ |
990 | BUG_ON(jl->j_len <= 0); | |
991 | BUG_ON(trans_id == journal->j_trans_id); | |
992 | ||
993 | get_journal_list(jl); | |
994 | if (flushall) { | |
995 | if (flush_older_commits(s, jl) == 1) { | |
098297b2 JM |
996 | /* |
997 | * list disappeared during flush_older_commits. | |
998 | * return | |
999 | */ | |
bd4c625c LT |
1000 | goto put_jl; |
1001 | } | |
1002 | } | |
1003 | ||
1004 | /* make sure nobody is trying to flush this one at the same time */ | |
8ebc4232 FW |
1005 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); |
1006 | ||
bd4c625c | 1007 | if (!journal_list_still_alive(s, trans_id)) { |
90415dea | 1008 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1009 | goto put_jl; |
1010 | } | |
1011 | BUG_ON(jl->j_trans_id == 0); | |
1012 | ||
1013 | /* this commit is done, exit */ | |
a228bf8f | 1014 | if (atomic_read(&jl->j_commit_left) <= 0) { |
bd4c625c | 1015 | if (flushall) { |
a228bf8f | 1016 | atomic_set(&jl->j_older_commits_done, 1); |
bd4c625c | 1017 | } |
90415dea | 1018 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1019 | goto put_jl; |
1020 | } | |
1021 | ||
1022 | if (!list_empty(&jl->j_bh_list)) { | |
3d4492f8 | 1023 | int ret; |
8ebc4232 FW |
1024 | |
1025 | /* | |
1026 | * We might sleep in numerous places inside | |
1027 | * write_ordered_buffers. Relax the write lock. | |
1028 | */ | |
278f6679 | 1029 | depth = reiserfs_write_unlock_nested(s); |
3d4492f8 CM |
1030 | ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, |
1031 | journal, jl, &jl->j_bh_list); | |
1032 | if (ret < 0 && retval == 0) | |
1033 | retval = ret; | |
278f6679 | 1034 | reiserfs_write_lock_nested(s, depth); |
bd4c625c LT |
1035 | } |
1036 | BUG_ON(!list_empty(&jl->j_bh_list)); | |
1037 | /* | |
1038 | * for the description block and all the log blocks, submit any buffers | |
e0e851cf CM |
1039 | * that haven't already reached the disk. Try to write at least 256 |
1040 | * log blocks. later on, we will only wait on blocks that correspond | |
1041 | * to this transaction, but while we're unplugging we might as well | |
1042 | * get a chunk of data on there. | |
bd4c625c LT |
1043 | */ |
1044 | atomic_inc(&journal->j_async_throttle); | |
e0e851cf CM |
1045 | write_len = jl->j_len + 1; |
1046 | if (write_len < 256) | |
1047 | write_len = 256; | |
1048 | for (i = 0 ; i < write_len ; i++) { | |
bd4c625c LT |
1049 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % |
1050 | SB_ONDISK_JOURNAL_SIZE(s); | |
1051 | tbh = journal_find_get_block(s, bn); | |
e0e851cf | 1052 | if (tbh) { |
6e3647ac | 1053 | if (buffer_dirty(tbh)) { |
278f6679 | 1054 | depth = reiserfs_write_unlock_nested(s); |
dfec8a14 | 1055 | ll_rw_block(REQ_OP_WRITE, 0, 1, &tbh); |
278f6679 | 1056 | reiserfs_write_lock_nested(s, depth); |
6e3647ac | 1057 | } |
e0e851cf CM |
1058 | put_bh(tbh) ; |
1059 | } | |
bd4c625c LT |
1060 | } |
1061 | atomic_dec(&journal->j_async_throttle); | |
1062 | ||
bd4c625c LT |
1063 | for (i = 0; i < (jl->j_len + 1); i++) { |
1064 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + | |
1065 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); | |
1066 | tbh = journal_find_get_block(s, bn); | |
8ebc4232 | 1067 | |
278f6679 JM |
1068 | depth = reiserfs_write_unlock_nested(s); |
1069 | __wait_on_buffer(tbh); | |
1070 | reiserfs_write_lock_nested(s, depth); | |
098297b2 JM |
1071 | /* |
1072 | * since we're using ll_rw_blk above, it might have skipped | |
1073 | * over a locked buffer. Double check here | |
1074 | */ | |
8ebc4232 FW |
1075 | /* redundant, sync_dirty_buffer() checks */ |
1076 | if (buffer_dirty(tbh)) { | |
278f6679 | 1077 | depth = reiserfs_write_unlock_nested(s); |
bd4c625c | 1078 | sync_dirty_buffer(tbh); |
278f6679 | 1079 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 1080 | } |
bd4c625c | 1081 | if (unlikely(!buffer_uptodate(tbh))) { |
1da177e4 | 1082 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1083 | reiserfs_warning(s, "journal-601", |
1084 | "buffer write failed"); | |
1da177e4 | 1085 | #endif |
bd4c625c LT |
1086 | retval = -EIO; |
1087 | } | |
098297b2 JM |
1088 | /* once for journal_find_get_block */ |
1089 | put_bh(tbh); | |
1090 | /* once due to original getblk in do_journal_end */ | |
1091 | put_bh(tbh); | |
a228bf8f | 1092 | atomic_dec(&jl->j_commit_left); |
bd4c625c LT |
1093 | } |
1094 | ||
a228bf8f | 1095 | BUG_ON(atomic_read(&jl->j_commit_left) != 1); |
bd4c625c | 1096 | |
098297b2 JM |
1097 | /* |
1098 | * If there was a write error in the journal - we can't commit | |
7cd33ad2 CH |
1099 | * this transaction - it will be invalid and, if successful, |
1100 | * will just end up propagating the write error out to | |
098297b2 JM |
1101 | * the file system. |
1102 | */ | |
7cd33ad2 CH |
1103 | if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { |
1104 | if (buffer_dirty(jl->j_commit_bh)) | |
1105 | BUG(); | |
1106 | mark_buffer_dirty(jl->j_commit_bh) ; | |
278f6679 | 1107 | depth = reiserfs_write_unlock_nested(s); |
7cd33ad2 | 1108 | if (reiserfs_barrier_flush(s)) |
70fd7614 | 1109 | __sync_dirty_buffer(jl->j_commit_bh, |
d8747d64 | 1110 | REQ_SYNC | REQ_PREFLUSH | REQ_FUA); |
7cd33ad2 CH |
1111 | else |
1112 | sync_dirty_buffer(jl->j_commit_bh); | |
278f6679 | 1113 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 1114 | } |
bd4c625c | 1115 | |
098297b2 JM |
1116 | /* |
1117 | * If there was a write error in the journal - we can't commit this | |
bd4c625c | 1118 | * transaction - it will be invalid and, if successful, will just end |
098297b2 JM |
1119 | * up propagating the write error out to the filesystem. |
1120 | */ | |
bd4c625c | 1121 | if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { |
1da177e4 | 1122 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e | 1123 | reiserfs_warning(s, "journal-615", "buffer write failed"); |
1da177e4 | 1124 | #endif |
bd4c625c LT |
1125 | retval = -EIO; |
1126 | } | |
1127 | bforget(jl->j_commit_bh); | |
1128 | if (journal->j_last_commit_id != 0 && | |
1129 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { | |
45b03d5e | 1130 | reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", |
bd4c625c LT |
1131 | journal->j_last_commit_id, jl->j_trans_id); |
1132 | } | |
1133 | journal->j_last_commit_id = jl->j_trans_id; | |
1134 | ||
098297b2 JM |
1135 | /* |
1136 | * now, every commit block is on the disk. It is safe to allow | |
1137 | * blocks freed during this transaction to be reallocated | |
1138 | */ | |
bd4c625c LT |
1139 | cleanup_freed_for_journal_list(s, jl); |
1140 | ||
1141 | retval = retval ? retval : journal->j_errno; | |
1142 | ||
1143 | /* mark the metadata dirty */ | |
1144 | if (!retval) | |
1145 | dirty_one_transaction(s, jl); | |
a228bf8f | 1146 | atomic_dec(&jl->j_commit_left); |
bd4c625c LT |
1147 | |
1148 | if (flushall) { | |
a228bf8f | 1149 | atomic_set(&jl->j_older_commits_done, 1); |
bd4c625c | 1150 | } |
90415dea | 1151 | mutex_unlock(&jl->j_commit_mutex); |
cf776a7a | 1152 | put_jl: |
bd4c625c LT |
1153 | put_journal_list(s, jl); |
1154 | ||
1155 | if (retval) | |
1156 | reiserfs_abort(s, retval, "Journal write error in %s", | |
fbe5498b | 1157 | __func__); |
bd4c625c | 1158 | return retval; |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | /* | |
098297b2 JM |
1162 | * flush_journal_list frequently needs to find a newer transaction for a |
1163 | * given block. This does that, or returns NULL if it can't find anything | |
1164 | */ | |
bd4c625c LT |
1165 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct |
1166 | reiserfs_journal_cnode | |
1167 | *cn) | |
1168 | { | |
1169 | struct super_block *sb = cn->sb; | |
1170 | b_blocknr_t blocknr = cn->blocknr; | |
1da177e4 | 1171 | |
bd4c625c LT |
1172 | cn = cn->hprev; |
1173 | while (cn) { | |
1174 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { | |
1175 | return cn->jlist; | |
1176 | } | |
1177 | cn = cn->hprev; | |
1178 | } | |
1179 | return NULL; | |
1da177e4 LT |
1180 | } |
1181 | ||
bd4c625c LT |
1182 | static void remove_journal_hash(struct super_block *, |
1183 | struct reiserfs_journal_cnode **, | |
1184 | struct reiserfs_journal_list *, unsigned long, | |
1185 | int); | |
1da177e4 LT |
1186 | |
1187 | /* | |
098297b2 JM |
1188 | * once all the real blocks have been flushed, it is safe to remove them |
1189 | * from the journal list for this transaction. Aside from freeing the | |
1190 | * cnode, this also allows the block to be reallocated for data blocks | |
1191 | * if it had been deleted. | |
1192 | */ | |
a9dd3643 | 1193 | static void remove_all_from_journal_list(struct super_block *sb, |
bd4c625c LT |
1194 | struct reiserfs_journal_list *jl, |
1195 | int debug) | |
1196 | { | |
a9dd3643 | 1197 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1198 | struct reiserfs_journal_cnode *cn, *last; |
1199 | cn = jl->j_realblock; | |
1200 | ||
098297b2 JM |
1201 | /* |
1202 | * which is better, to lock once around the whole loop, or | |
1203 | * to lock for each call to remove_journal_hash? | |
bd4c625c LT |
1204 | */ |
1205 | while (cn) { | |
1206 | if (cn->blocknr != 0) { | |
1207 | if (debug) { | |
a9dd3643 | 1208 | reiserfs_warning(sb, "reiserfs-2201", |
bd4c625c LT |
1209 | "block %u, bh is %d, state %ld", |
1210 | cn->blocknr, cn->bh ? 1 : 0, | |
1211 | cn->state); | |
1212 | } | |
1213 | cn->state = 0; | |
a9dd3643 | 1214 | remove_journal_hash(sb, journal->j_list_hash_table, |
bd4c625c LT |
1215 | jl, cn->blocknr, 1); |
1216 | } | |
1217 | last = cn; | |
1218 | cn = cn->next; | |
a9dd3643 | 1219 | free_cnode(sb, last); |
bd4c625c LT |
1220 | } |
1221 | jl->j_realblock = NULL; | |
1da177e4 LT |
1222 | } |
1223 | ||
1224 | /* | |
098297b2 JM |
1225 | * if this timestamp is greater than the timestamp we wrote last to the |
1226 | * header block, write it to the header block. once this is done, I can | |
1227 | * safely say the log area for this transaction won't ever be replayed, | |
1228 | * and I can start releasing blocks in this transaction for reuse as data | |
1229 | * blocks. called by flush_journal_list, before it calls | |
1230 | * remove_all_from_journal_list | |
1231 | */ | |
a9dd3643 | 1232 | static int _update_journal_header_block(struct super_block *sb, |
bd4c625c | 1233 | unsigned long offset, |
600ed416 | 1234 | unsigned int trans_id) |
bd4c625c LT |
1235 | { |
1236 | struct reiserfs_journal_header *jh; | |
a9dd3643 | 1237 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
278f6679 | 1238 | int depth; |
1da177e4 | 1239 | |
bd4c625c LT |
1240 | if (reiserfs_is_journal_aborted(journal)) |
1241 | return -EIO; | |
1da177e4 | 1242 | |
bd4c625c LT |
1243 | if (trans_id >= journal->j_last_flush_trans_id) { |
1244 | if (buffer_locked((journal->j_header_bh))) { | |
278f6679 JM |
1245 | depth = reiserfs_write_unlock_nested(sb); |
1246 | __wait_on_buffer(journal->j_header_bh); | |
1247 | reiserfs_write_lock_nested(sb, depth); | |
bd4c625c | 1248 | if (unlikely(!buffer_uptodate(journal->j_header_bh))) { |
1da177e4 | 1249 | #ifdef CONFIG_REISERFS_CHECK |
a9dd3643 | 1250 | reiserfs_warning(sb, "journal-699", |
45b03d5e | 1251 | "buffer write failed"); |
1da177e4 | 1252 | #endif |
bd4c625c LT |
1253 | return -EIO; |
1254 | } | |
1255 | } | |
1256 | journal->j_last_flush_trans_id = trans_id; | |
1257 | journal->j_first_unflushed_offset = offset; | |
1258 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> | |
1259 | b_data); | |
1260 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id); | |
1261 | jh->j_first_unflushed_offset = cpu_to_le32(offset); | |
1262 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id); | |
1263 | ||
7cd33ad2 | 1264 | set_buffer_dirty(journal->j_header_bh); |
278f6679 | 1265 | depth = reiserfs_write_unlock_nested(sb); |
7cd33ad2 CH |
1266 | |
1267 | if (reiserfs_barrier_flush(sb)) | |
70fd7614 | 1268 | __sync_dirty_buffer(journal->j_header_bh, |
d8747d64 | 1269 | REQ_SYNC | REQ_PREFLUSH | REQ_FUA); |
7cd33ad2 | 1270 | else |
bd4c625c | 1271 | sync_dirty_buffer(journal->j_header_bh); |
7cd33ad2 | 1272 | |
278f6679 | 1273 | reiserfs_write_lock_nested(sb, depth); |
bd4c625c | 1274 | if (!buffer_uptodate(journal->j_header_bh)) { |
a9dd3643 | 1275 | reiserfs_warning(sb, "journal-837", |
45b03d5e | 1276 | "IO error during journal replay"); |
bd4c625c LT |
1277 | return -EIO; |
1278 | } | |
1279 | } | |
1280 | return 0; | |
1281 | } | |
1282 | ||
a9dd3643 | 1283 | static int update_journal_header_block(struct super_block *sb, |
bd4c625c | 1284 | unsigned long offset, |
600ed416 | 1285 | unsigned int trans_id) |
bd4c625c | 1286 | { |
a9dd3643 | 1287 | return _update_journal_header_block(sb, offset, trans_id); |
1da177e4 | 1288 | } |
bd4c625c | 1289 | |
0222e657 JM |
1290 | /* |
1291 | ** flush any and all journal lists older than you are | |
1da177e4 LT |
1292 | ** can only be called from flush_journal_list |
1293 | */ | |
a9dd3643 | 1294 | static int flush_older_journal_lists(struct super_block *sb, |
bd4c625c LT |
1295 | struct reiserfs_journal_list *jl) |
1296 | { | |
1297 | struct list_head *entry; | |
1298 | struct reiserfs_journal_list *other_jl; | |
a9dd3643 | 1299 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
600ed416 | 1300 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 1301 | |
098297b2 JM |
1302 | /* |
1303 | * we know we are the only ones flushing things, no extra race | |
bd4c625c LT |
1304 | * protection is required. |
1305 | */ | |
cf776a7a | 1306 | restart: |
bd4c625c LT |
1307 | entry = journal->j_journal_list.next; |
1308 | /* Did we wrap? */ | |
1309 | if (entry == &journal->j_journal_list) | |
1310 | return 0; | |
1311 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
1312 | if (other_jl->j_trans_id < trans_id) { | |
1313 | BUG_ON(other_jl->j_refcount <= 0); | |
1314 | /* do not flush all */ | |
a9dd3643 | 1315 | flush_journal_list(sb, other_jl, 0); |
bd4c625c LT |
1316 | |
1317 | /* other_jl is now deleted from the list */ | |
1318 | goto restart; | |
1319 | } | |
1320 | return 0; | |
1da177e4 LT |
1321 | } |
1322 | ||
1323 | static void del_from_work_list(struct super_block *s, | |
bd4c625c LT |
1324 | struct reiserfs_journal_list *jl) |
1325 | { | |
1326 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1327 | if (!list_empty(&jl->j_working_list)) { | |
1328 | list_del_init(&jl->j_working_list); | |
1329 | journal->j_num_work_lists--; | |
1330 | } | |
1da177e4 LT |
1331 | } |
1332 | ||
098297b2 JM |
1333 | /* |
1334 | * flush a journal list, both commit and real blocks | |
1335 | * | |
1336 | * always set flushall to 1, unless you are calling from inside | |
1337 | * flush_journal_list | |
1338 | * | |
1339 | * IMPORTANT. This can only be called while there are no journal writers, | |
1340 | * and the journal is locked. That means it can only be called from | |
1341 | * do_journal_end, or by journal_release | |
1342 | */ | |
bd4c625c LT |
1343 | static int flush_journal_list(struct super_block *s, |
1344 | struct reiserfs_journal_list *jl, int flushall) | |
1da177e4 | 1345 | { |
bd4c625c | 1346 | struct reiserfs_journal_list *pjl; |
6e9ca45f | 1347 | struct reiserfs_journal_cnode *cn; |
bd4c625c LT |
1348 | int count; |
1349 | int was_jwait = 0; | |
1350 | int was_dirty = 0; | |
1351 | struct buffer_head *saved_bh; | |
1352 | unsigned long j_len_saved = jl->j_len; | |
1353 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1354 | int err = 0; | |
278f6679 | 1355 | int depth; |
bd4c625c LT |
1356 | |
1357 | BUG_ON(j_len_saved <= 0); | |
1358 | ||
1359 | if (atomic_read(&journal->j_wcount) != 0) { | |
45b03d5e | 1360 | reiserfs_warning(s, "clm-2048", "called with wcount %d", |
bd4c625c LT |
1361 | atomic_read(&journal->j_wcount)); |
1362 | } | |
1da177e4 | 1363 | |
bd4c625c LT |
1364 | /* if flushall == 0, the lock is already held */ |
1365 | if (flushall) { | |
8ebc4232 | 1366 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
afe70259 | 1367 | } else if (mutex_trylock(&journal->j_flush_mutex)) { |
bd4c625c LT |
1368 | BUG(); |
1369 | } | |
1da177e4 | 1370 | |
bd4c625c LT |
1371 | count = 0; |
1372 | if (j_len_saved > journal->j_trans_max) { | |
c3a9c210 | 1373 | reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", |
bd4c625c LT |
1374 | j_len_saved, jl->j_trans_id); |
1375 | return 0; | |
1376 | } | |
1da177e4 | 1377 | |
bd4c625c | 1378 | /* if all the work is already done, get out of here */ |
a228bf8f JM |
1379 | if (atomic_read(&jl->j_nonzerolen) <= 0 && |
1380 | atomic_read(&jl->j_commit_left) <= 0) { | |
bd4c625c LT |
1381 | goto flush_older_and_return; |
1382 | } | |
1383 | ||
098297b2 JM |
1384 | /* |
1385 | * start by putting the commit list on disk. This will also flush | |
1386 | * the commit lists of any olders transactions | |
bd4c625c LT |
1387 | */ |
1388 | flush_commit_list(s, jl, 1); | |
1389 | ||
1390 | if (!(jl->j_state & LIST_DIRTY) | |
1391 | && !reiserfs_is_journal_aborted(journal)) | |
1392 | BUG(); | |
1393 | ||
1394 | /* are we done now? */ | |
a228bf8f JM |
1395 | if (atomic_read(&jl->j_nonzerolen) <= 0 && |
1396 | atomic_read(&jl->j_commit_left) <= 0) { | |
bd4c625c LT |
1397 | goto flush_older_and_return; |
1398 | } | |
1399 | ||
098297b2 JM |
1400 | /* |
1401 | * loop through each cnode, see if we need to write it, | |
1402 | * or wait on a more recent transaction, or just ignore it | |
bd4c625c | 1403 | */ |
a228bf8f | 1404 | if (atomic_read(&journal->j_wcount) != 0) { |
c3a9c210 JM |
1405 | reiserfs_panic(s, "journal-844", "journal list is flushing, " |
1406 | "wcount is not 0"); | |
bd4c625c LT |
1407 | } |
1408 | cn = jl->j_realblock; | |
1409 | while (cn) { | |
1410 | was_jwait = 0; | |
1411 | was_dirty = 0; | |
1412 | saved_bh = NULL; | |
1413 | /* blocknr of 0 is no longer in the hash, ignore it */ | |
1414 | if (cn->blocknr == 0) { | |
1415 | goto free_cnode; | |
1416 | } | |
1417 | ||
098297b2 JM |
1418 | /* |
1419 | * This transaction failed commit. | |
1420 | * Don't write out to the disk | |
1421 | */ | |
bd4c625c LT |
1422 | if (!(jl->j_state & LIST_DIRTY)) |
1423 | goto free_cnode; | |
1424 | ||
1425 | pjl = find_newer_jl_for_cn(cn); | |
098297b2 JM |
1426 | /* |
1427 | * the order is important here. We check pjl to make sure we | |
1428 | * don't clear BH_JDirty_wait if we aren't the one writing this | |
1429 | * block to disk | |
bd4c625c LT |
1430 | */ |
1431 | if (!pjl && cn->bh) { | |
1432 | saved_bh = cn->bh; | |
1433 | ||
098297b2 JM |
1434 | /* |
1435 | * we do this to make sure nobody releases the | |
1436 | * buffer while we are working with it | |
bd4c625c LT |
1437 | */ |
1438 | get_bh(saved_bh); | |
1439 | ||
1440 | if (buffer_journal_dirty(saved_bh)) { | |
1441 | BUG_ON(!can_dirty(cn)); | |
1442 | was_jwait = 1; | |
1443 | was_dirty = 1; | |
1444 | } else if (can_dirty(cn)) { | |
098297b2 JM |
1445 | /* |
1446 | * everything with !pjl && jwait | |
1447 | * should be writable | |
1448 | */ | |
bd4c625c LT |
1449 | BUG(); |
1450 | } | |
1451 | } | |
1452 | ||
098297b2 JM |
1453 | /* |
1454 | * if someone has this block in a newer transaction, just make | |
1455 | * sure they are committed, and don't try writing it to disk | |
bd4c625c LT |
1456 | */ |
1457 | if (pjl) { | |
1458 | if (atomic_read(&pjl->j_commit_left)) | |
1459 | flush_commit_list(s, pjl, 1); | |
1460 | goto free_cnode; | |
1461 | } | |
1462 | ||
098297b2 JM |
1463 | /* |
1464 | * bh == NULL when the block got to disk on its own, OR, | |
1465 | * the block got freed in a future transaction | |
bd4c625c LT |
1466 | */ |
1467 | if (saved_bh == NULL) { | |
1468 | goto free_cnode; | |
1469 | } | |
1470 | ||
098297b2 JM |
1471 | /* |
1472 | * this should never happen. kupdate_one_transaction has | |
1473 | * this list locked while it works, so we should never see a | |
1474 | * buffer here that is not marked JDirty_wait | |
bd4c625c LT |
1475 | */ |
1476 | if ((!was_jwait) && !buffer_locked(saved_bh)) { | |
45b03d5e JM |
1477 | reiserfs_warning(s, "journal-813", |
1478 | "BAD! buffer %llu %cdirty %cjwait, " | |
65f2b263 | 1479 | "not in a newer transaction", |
bd4c625c LT |
1480 | (unsigned long long)saved_bh-> |
1481 | b_blocknr, was_dirty ? ' ' : '!', | |
1482 | was_jwait ? ' ' : '!'); | |
1483 | } | |
1484 | if (was_dirty) { | |
098297b2 JM |
1485 | /* |
1486 | * we inc again because saved_bh gets decremented | |
1487 | * at free_cnode | |
1488 | */ | |
bd4c625c LT |
1489 | get_bh(saved_bh); |
1490 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state); | |
1491 | lock_buffer(saved_bh); | |
1492 | BUG_ON(cn->blocknr != saved_bh->b_blocknr); | |
1493 | if (buffer_dirty(saved_bh)) | |
1494 | submit_logged_buffer(saved_bh); | |
1495 | else | |
1496 | unlock_buffer(saved_bh); | |
1497 | count++; | |
1498 | } else { | |
45b03d5e JM |
1499 | reiserfs_warning(s, "clm-2082", |
1500 | "Unable to flush buffer %llu in %s", | |
bd4c625c | 1501 | (unsigned long long)saved_bh-> |
fbe5498b | 1502 | b_blocknr, __func__); |
bd4c625c | 1503 | } |
cf776a7a | 1504 | free_cnode: |
bd4c625c LT |
1505 | cn = cn->next; |
1506 | if (saved_bh) { | |
098297b2 JM |
1507 | /* |
1508 | * we incremented this to keep others from | |
1509 | * taking the buffer head away | |
1510 | */ | |
bd4c625c | 1511 | put_bh(saved_bh); |
a228bf8f | 1512 | if (atomic_read(&saved_bh->b_count) < 0) { |
45b03d5e JM |
1513 | reiserfs_warning(s, "journal-945", |
1514 | "saved_bh->b_count < 0"); | |
bd4c625c LT |
1515 | } |
1516 | } | |
1517 | } | |
1518 | if (count > 0) { | |
1519 | cn = jl->j_realblock; | |
1520 | while (cn) { | |
1521 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { | |
1522 | if (!cn->bh) { | |
c3a9c210 JM |
1523 | reiserfs_panic(s, "journal-1011", |
1524 | "cn->bh is NULL"); | |
bd4c625c | 1525 | } |
8ebc4232 | 1526 | |
278f6679 JM |
1527 | depth = reiserfs_write_unlock_nested(s); |
1528 | __wait_on_buffer(cn->bh); | |
1529 | reiserfs_write_lock_nested(s, depth); | |
8ebc4232 | 1530 | |
bd4c625c | 1531 | if (!cn->bh) { |
c3a9c210 JM |
1532 | reiserfs_panic(s, "journal-1012", |
1533 | "cn->bh is NULL"); | |
bd4c625c LT |
1534 | } |
1535 | if (unlikely(!buffer_uptodate(cn->bh))) { | |
1536 | #ifdef CONFIG_REISERFS_CHECK | |
45b03d5e JM |
1537 | reiserfs_warning(s, "journal-949", |
1538 | "buffer write failed"); | |
bd4c625c LT |
1539 | #endif |
1540 | err = -EIO; | |
1541 | } | |
098297b2 JM |
1542 | /* |
1543 | * note, we must clear the JDirty_wait bit | |
1544 | * after the up to date check, otherwise we | |
1545 | * race against our flushpage routine | |
bd4c625c LT |
1546 | */ |
1547 | BUG_ON(!test_clear_buffer_journal_dirty | |
1548 | (cn->bh)); | |
1549 | ||
398c95bd | 1550 | /* drop one ref for us */ |
bd4c625c | 1551 | put_bh(cn->bh); |
398c95bd CM |
1552 | /* drop one ref for journal_mark_dirty */ |
1553 | release_buffer_page(cn->bh); | |
bd4c625c LT |
1554 | } |
1555 | cn = cn->next; | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | if (err) | |
1560 | reiserfs_abort(s, -EIO, | |
1561 | "Write error while pushing transaction to disk in %s", | |
fbe5498b | 1562 | __func__); |
cf776a7a | 1563 | flush_older_and_return: |
bd4c625c | 1564 | |
098297b2 JM |
1565 | /* |
1566 | * before we can update the journal header block, we _must_ flush all | |
1567 | * real blocks from all older transactions to disk. This is because | |
1568 | * once the header block is updated, this transaction will not be | |
1569 | * replayed after a crash | |
bd4c625c LT |
1570 | */ |
1571 | if (flushall) { | |
1572 | flush_older_journal_lists(s, jl); | |
1573 | } | |
1574 | ||
1575 | err = journal->j_errno; | |
098297b2 JM |
1576 | /* |
1577 | * before we can remove everything from the hash tables for this | |
1578 | * transaction, we must make sure it can never be replayed | |
1579 | * | |
1580 | * since we are only called from do_journal_end, we know for sure there | |
1581 | * are no allocations going on while we are flushing journal lists. So, | |
1582 | * we only need to update the journal header block for the last list | |
1583 | * being flushed | |
bd4c625c LT |
1584 | */ |
1585 | if (!err && flushall) { | |
1586 | err = | |
1587 | update_journal_header_block(s, | |
1588 | (jl->j_start + jl->j_len + | |
1589 | 2) % SB_ONDISK_JOURNAL_SIZE(s), | |
1590 | jl->j_trans_id); | |
1591 | if (err) | |
1592 | reiserfs_abort(s, -EIO, | |
1593 | "Write error while updating journal header in %s", | |
fbe5498b | 1594 | __func__); |
bd4c625c LT |
1595 | } |
1596 | remove_all_from_journal_list(s, jl, 0); | |
1597 | list_del_init(&jl->j_list); | |
1598 | journal->j_num_lists--; | |
1599 | del_from_work_list(s, jl); | |
1600 | ||
1601 | if (journal->j_last_flush_id != 0 && | |
1602 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { | |
45b03d5e | 1603 | reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", |
bd4c625c LT |
1604 | journal->j_last_flush_id, jl->j_trans_id); |
1605 | } | |
1606 | journal->j_last_flush_id = jl->j_trans_id; | |
1607 | ||
098297b2 JM |
1608 | /* |
1609 | * not strictly required since we are freeing the list, but it should | |
bd4c625c LT |
1610 | * help find code using dead lists later on |
1611 | */ | |
1612 | jl->j_len = 0; | |
a228bf8f | 1613 | atomic_set(&jl->j_nonzerolen, 0); |
bd4c625c LT |
1614 | jl->j_start = 0; |
1615 | jl->j_realblock = NULL; | |
1616 | jl->j_commit_bh = NULL; | |
1617 | jl->j_trans_id = 0; | |
1618 | jl->j_state = 0; | |
1619 | put_journal_list(s, jl); | |
1620 | if (flushall) | |
afe70259 | 1621 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1622 | return err; |
1623 | } | |
1624 | ||
1625 | static int write_one_transaction(struct super_block *s, | |
1626 | struct reiserfs_journal_list *jl, | |
1627 | struct buffer_chunk *chunk) | |
1628 | { | |
1629 | struct reiserfs_journal_cnode *cn; | |
1630 | int ret = 0; | |
1631 | ||
1632 | jl->j_state |= LIST_TOUCHED; | |
1633 | del_from_work_list(s, jl); | |
1634 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | cn = jl->j_realblock; | |
1639 | while (cn) { | |
098297b2 JM |
1640 | /* |
1641 | * if the blocknr == 0, this has been cleared from the hash, | |
1642 | * skip it | |
bd4c625c LT |
1643 | */ |
1644 | if (cn->blocknr == 0) { | |
1645 | goto next; | |
1646 | } | |
1647 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { | |
1648 | struct buffer_head *tmp_bh; | |
098297b2 JM |
1649 | /* |
1650 | * we can race against journal_mark_freed when we try | |
bd4c625c LT |
1651 | * to lock_buffer(cn->bh), so we have to inc the buffer |
1652 | * count, and recheck things after locking | |
1653 | */ | |
1654 | tmp_bh = cn->bh; | |
1655 | get_bh(tmp_bh); | |
1656 | lock_buffer(tmp_bh); | |
1657 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { | |
1658 | if (!buffer_journal_dirty(tmp_bh) || | |
1659 | buffer_journal_prepared(tmp_bh)) | |
1660 | BUG(); | |
1661 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); | |
1662 | ret++; | |
1663 | } else { | |
1664 | /* note, cn->bh might be null now */ | |
1665 | unlock_buffer(tmp_bh); | |
1666 | } | |
1667 | put_bh(tmp_bh); | |
1668 | } | |
cf776a7a | 1669 | next: |
bd4c625c LT |
1670 | cn = cn->next; |
1671 | cond_resched(); | |
1672 | } | |
1673 | return ret; | |
1674 | } | |
1675 | ||
1676 | /* used by flush_commit_list */ | |
dc0dde61 | 1677 | static void dirty_one_transaction(struct super_block *s, |
bd4c625c LT |
1678 | struct reiserfs_journal_list *jl) |
1679 | { | |
1680 | struct reiserfs_journal_cnode *cn; | |
1681 | struct reiserfs_journal_list *pjl; | |
bd4c625c LT |
1682 | |
1683 | jl->j_state |= LIST_DIRTY; | |
1684 | cn = jl->j_realblock; | |
1685 | while (cn) { | |
098297b2 JM |
1686 | /* |
1687 | * look for a more recent transaction that logged this | |
1688 | * buffer. Only the most recent transaction with a buffer in | |
1689 | * it is allowed to send that buffer to disk | |
bd4c625c LT |
1690 | */ |
1691 | pjl = find_newer_jl_for_cn(cn); | |
1692 | if (!pjl && cn->blocknr && cn->bh | |
1693 | && buffer_journal_dirty(cn->bh)) { | |
1694 | BUG_ON(!can_dirty(cn)); | |
098297b2 JM |
1695 | /* |
1696 | * if the buffer is prepared, it will either be logged | |
bd4c625c LT |
1697 | * or restored. If restored, we need to make sure |
1698 | * it actually gets marked dirty | |
1699 | */ | |
1700 | clear_buffer_journal_new(cn->bh); | |
1701 | if (buffer_journal_prepared(cn->bh)) { | |
1702 | set_buffer_journal_restore_dirty(cn->bh); | |
1703 | } else { | |
1704 | set_buffer_journal_test(cn->bh); | |
1705 | mark_buffer_dirty(cn->bh); | |
1706 | } | |
1707 | } | |
1708 | cn = cn->next; | |
1709 | } | |
bd4c625c LT |
1710 | } |
1711 | ||
1712 | static int kupdate_transactions(struct super_block *s, | |
1713 | struct reiserfs_journal_list *jl, | |
1714 | struct reiserfs_journal_list **next_jl, | |
600ed416 | 1715 | unsigned int *next_trans_id, |
bd4c625c LT |
1716 | int num_blocks, int num_trans) |
1717 | { | |
1718 | int ret = 0; | |
1719 | int written = 0; | |
1720 | int transactions_flushed = 0; | |
600ed416 | 1721 | unsigned int orig_trans_id = jl->j_trans_id; |
bd4c625c LT |
1722 | struct buffer_chunk chunk; |
1723 | struct list_head *entry; | |
1724 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1725 | chunk.nr = 0; | |
1726 | ||
a412f9ef | 1727 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
bd4c625c LT |
1728 | if (!journal_list_still_alive(s, orig_trans_id)) { |
1729 | goto done; | |
1730 | } | |
1731 | ||
098297b2 JM |
1732 | /* |
1733 | * we've got j_flush_mutex held, nobody is going to delete any | |
bd4c625c LT |
1734 | * of these lists out from underneath us |
1735 | */ | |
1736 | while ((num_trans && transactions_flushed < num_trans) || | |
1737 | (!num_trans && written < num_blocks)) { | |
1738 | ||
1739 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || | |
1740 | atomic_read(&jl->j_commit_left) | |
1741 | || !(jl->j_state & LIST_DIRTY)) { | |
1742 | del_from_work_list(s, jl); | |
1743 | break; | |
1744 | } | |
1745 | ret = write_one_transaction(s, jl, &chunk); | |
1746 | ||
1747 | if (ret < 0) | |
1748 | goto done; | |
1749 | transactions_flushed++; | |
1750 | written += ret; | |
1751 | entry = jl->j_list.next; | |
1752 | ||
1753 | /* did we wrap? */ | |
1754 | if (entry == &journal->j_journal_list) { | |
1755 | break; | |
1756 | } | |
1757 | jl = JOURNAL_LIST_ENTRY(entry); | |
1758 | ||
1759 | /* don't bother with older transactions */ | |
1760 | if (jl->j_trans_id <= orig_trans_id) | |
1761 | break; | |
1762 | } | |
1763 | if (chunk.nr) { | |
1764 | write_chunk(&chunk); | |
1765 | } | |
1766 | ||
cf776a7a | 1767 | done: |
afe70259 | 1768 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1769 | return ret; |
1770 | } | |
1771 | ||
098297b2 JM |
1772 | /* |
1773 | * for o_sync and fsync heavy applications, they tend to use | |
1774 | * all the journa list slots with tiny transactions. These | |
1775 | * trigger lots and lots of calls to update the header block, which | |
1776 | * adds seeks and slows things down. | |
1777 | * | |
1778 | * This function tries to clear out a large chunk of the journal lists | |
1779 | * at once, which makes everything faster since only the newest journal | |
1780 | * list updates the header block | |
1781 | */ | |
1da177e4 | 1782 | static int flush_used_journal_lists(struct super_block *s, |
bd4c625c LT |
1783 | struct reiserfs_journal_list *jl) |
1784 | { | |
1785 | unsigned long len = 0; | |
1786 | unsigned long cur_len; | |
bd4c625c LT |
1787 | int i; |
1788 | int limit = 256; | |
1789 | struct reiserfs_journal_list *tjl; | |
1790 | struct reiserfs_journal_list *flush_jl; | |
600ed416 | 1791 | unsigned int trans_id; |
bd4c625c LT |
1792 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1793 | ||
1794 | flush_jl = tjl = jl; | |
1795 | ||
1796 | /* in data logging mode, try harder to flush a lot of blocks */ | |
1797 | if (reiserfs_data_log(s)) | |
1798 | limit = 1024; | |
1799 | /* flush for 256 transactions or limit blocks, whichever comes first */ | |
1800 | for (i = 0; i < 256 && len < limit; i++) { | |
1801 | if (atomic_read(&tjl->j_commit_left) || | |
1802 | tjl->j_trans_id < jl->j_trans_id) { | |
1803 | break; | |
1804 | } | |
1805 | cur_len = atomic_read(&tjl->j_nonzerolen); | |
1806 | if (cur_len > 0) { | |
1807 | tjl->j_state &= ~LIST_TOUCHED; | |
1808 | } | |
1809 | len += cur_len; | |
1810 | flush_jl = tjl; | |
1811 | if (tjl->j_list.next == &journal->j_journal_list) | |
1812 | break; | |
1813 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); | |
1814 | } | |
721a769c JM |
1815 | get_journal_list(jl); |
1816 | get_journal_list(flush_jl); | |
098297b2 JM |
1817 | |
1818 | /* | |
1819 | * try to find a group of blocks we can flush across all the | |
1820 | * transactions, but only bother if we've actually spanned | |
1821 | * across multiple lists | |
bd4c625c | 1822 | */ |
3e9fd5a4 JY |
1823 | if (flush_jl != jl) |
1824 | kupdate_transactions(s, jl, &tjl, &trans_id, len, i); | |
1825 | ||
bd4c625c | 1826 | flush_journal_list(s, flush_jl, 1); |
721a769c JM |
1827 | put_journal_list(s, flush_jl); |
1828 | put_journal_list(s, jl); | |
bd4c625c | 1829 | return 0; |
1da177e4 LT |
1830 | } |
1831 | ||
1832 | /* | |
098297b2 JM |
1833 | * removes any nodes in table with name block and dev as bh. |
1834 | * only touchs the hnext and hprev pointers. | |
1835 | */ | |
5d552ad7 | 1836 | static void remove_journal_hash(struct super_block *sb, |
bd4c625c LT |
1837 | struct reiserfs_journal_cnode **table, |
1838 | struct reiserfs_journal_list *jl, | |
1839 | unsigned long block, int remove_freed) | |
1840 | { | |
1841 | struct reiserfs_journal_cnode *cur; | |
1842 | struct reiserfs_journal_cnode **head; | |
1843 | ||
1844 | head = &(journal_hash(table, sb, block)); | |
1845 | if (!head) { | |
1846 | return; | |
1847 | } | |
1848 | cur = *head; | |
1849 | while (cur) { | |
1850 | if (cur->blocknr == block && cur->sb == sb | |
1851 | && (jl == NULL || jl == cur->jlist) | |
1852 | && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { | |
1853 | if (cur->hnext) { | |
1854 | cur->hnext->hprev = cur->hprev; | |
1855 | } | |
1856 | if (cur->hprev) { | |
1857 | cur->hprev->hnext = cur->hnext; | |
1858 | } else { | |
1859 | *head = cur->hnext; | |
1860 | } | |
1861 | cur->blocknr = 0; | |
1862 | cur->sb = NULL; | |
1863 | cur->state = 0; | |
098297b2 JM |
1864 | /* |
1865 | * anybody who clears the cur->bh will also | |
1866 | * dec the nonzerolen | |
1867 | */ | |
1868 | if (cur->bh && cur->jlist) | |
a228bf8f | 1869 | atomic_dec(&cur->jlist->j_nonzerolen); |
bd4c625c LT |
1870 | cur->bh = NULL; |
1871 | cur->jlist = NULL; | |
1872 | } | |
1873 | cur = cur->hnext; | |
1874 | } | |
1875 | } | |
1876 | ||
a9dd3643 | 1877 | static void free_journal_ram(struct super_block *sb) |
bd4c625c | 1878 | { |
a9dd3643 | 1879 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
d739b42b | 1880 | kfree(journal->j_current_jl); |
bd4c625c LT |
1881 | journal->j_num_lists--; |
1882 | ||
1883 | vfree(journal->j_cnode_free_orig); | |
a9dd3643 JM |
1884 | free_list_bitmaps(sb, journal->j_list_bitmap); |
1885 | free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ | |
bd4c625c LT |
1886 | if (journal->j_header_bh) { |
1887 | brelse(journal->j_header_bh); | |
1888 | } | |
098297b2 JM |
1889 | /* |
1890 | * j_header_bh is on the journal dev, make sure | |
1891 | * not to release the journal dev until we brelse j_header_bh | |
bd4c625c | 1892 | */ |
a9dd3643 | 1893 | release_journal_dev(sb, journal); |
bd4c625c | 1894 | vfree(journal); |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | /* | |
098297b2 JM |
1898 | * call on unmount. Only set error to 1 if you haven't made your way out |
1899 | * of read_super() yet. Any other caller must keep error at 0. | |
1900 | */ | |
bd4c625c | 1901 | static int do_journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1902 | struct super_block *sb, int error) |
bd4c625c LT |
1903 | { |
1904 | struct reiserfs_transaction_handle myth; | |
a9dd3643 | 1905 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 1906 | |
098297b2 JM |
1907 | /* |
1908 | * we only want to flush out transactions if we were | |
1909 | * called with error == 0 | |
bd4c625c | 1910 | */ |
bc98a42c | 1911 | if (!error && !sb_rdonly(sb)) { |
bd4c625c LT |
1912 | /* end the current trans */ |
1913 | BUG_ON(!th->t_trans_id); | |
58d85426 | 1914 | do_journal_end(th, FLUSH_ALL); |
bd4c625c | 1915 | |
098297b2 JM |
1916 | /* |
1917 | * make sure something gets logged to force | |
1918 | * our way into the flush code | |
1919 | */ | |
b491dd17 | 1920 | if (!journal_join(&myth, sb)) { |
a9dd3643 JM |
1921 | reiserfs_prepare_for_journal(sb, |
1922 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1923 | 1); |
09f1b80b | 1924 | journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb)); |
58d85426 | 1925 | do_journal_end(&myth, FLUSH_ALL); |
bd4c625c LT |
1926 | } |
1927 | } | |
1928 | ||
1929 | /* this also catches errors during the do_journal_end above */ | |
1930 | if (!error && reiserfs_is_journal_aborted(journal)) { | |
1931 | memset(&myth, 0, sizeof(myth)); | |
b491dd17 | 1932 | if (!journal_join_abort(&myth, sb)) { |
a9dd3643 JM |
1933 | reiserfs_prepare_for_journal(sb, |
1934 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1935 | 1); |
09f1b80b | 1936 | journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb)); |
58d85426 | 1937 | do_journal_end(&myth, FLUSH_ALL); |
bd4c625c LT |
1938 | } |
1939 | } | |
1940 | ||
8ebc4232 FW |
1941 | |
1942 | /* | |
1943 | * We must release the write lock here because | |
1944 | * the workqueue job (flush_async_commit) needs this lock | |
1945 | */ | |
1946 | reiserfs_write_unlock(sb); | |
033369d1 | 1947 | |
01777836 JK |
1948 | /* |
1949 | * Cancel flushing of old commits. Note that neither of these works | |
1950 | * will be requeued because superblock is being shutdown and doesn't | |
1751e8a6 | 1951 | * have SB_ACTIVE set. |
01777836 | 1952 | */ |
71b0576b | 1953 | reiserfs_cancel_old_flush(sb); |
01777836 JK |
1954 | /* wait for all commits to finish */ |
1955 | cancel_delayed_work_sync(&SB_JOURNAL(sb)->j_work); | |
bd4c625c | 1956 | |
a9dd3643 | 1957 | free_journal_ram(sb); |
bd4c625c | 1958 | |
0523676d FW |
1959 | reiserfs_write_lock(sb); |
1960 | ||
bd4c625c | 1961 | return 0; |
1da177e4 LT |
1962 | } |
1963 | ||
098297b2 | 1964 | /* * call on unmount. flush all journal trans, release all alloc'd ram */ |
bd4c625c | 1965 | int journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1966 | struct super_block *sb) |
bd4c625c | 1967 | { |
a9dd3643 | 1968 | return do_journal_release(th, sb, 0); |
1da177e4 | 1969 | } |
bd4c625c | 1970 | |
098297b2 | 1971 | /* only call from an error condition inside reiserfs_read_super! */ |
bd4c625c | 1972 | int journal_release_error(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1973 | struct super_block *sb) |
bd4c625c | 1974 | { |
a9dd3643 | 1975 | return do_journal_release(th, sb, 1); |
1da177e4 LT |
1976 | } |
1977 | ||
098297b2 JM |
1978 | /* |
1979 | * compares description block with commit block. | |
1980 | * returns 1 if they differ, 0 if they are the same | |
1981 | */ | |
a9dd3643 | 1982 | static int journal_compare_desc_commit(struct super_block *sb, |
bd4c625c LT |
1983 | struct reiserfs_journal_desc *desc, |
1984 | struct reiserfs_journal_commit *commit) | |
1985 | { | |
1986 | if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || | |
1987 | get_commit_trans_len(commit) != get_desc_trans_len(desc) || | |
a9dd3643 | 1988 | get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || |
bd4c625c LT |
1989 | get_commit_trans_len(commit) <= 0) { |
1990 | return 1; | |
1991 | } | |
1992 | return 0; | |
1da177e4 | 1993 | } |
bd4c625c | 1994 | |
098297b2 JM |
1995 | /* |
1996 | * returns 0 if it did not find a description block | |
1997 | * returns -1 if it found a corrupt commit block | |
1998 | * returns 1 if both desc and commit were valid | |
1999 | * NOTE: only called during fs mount | |
2000 | */ | |
a9dd3643 | 2001 | static int journal_transaction_is_valid(struct super_block *sb, |
bd4c625c | 2002 | struct buffer_head *d_bh, |
600ed416 | 2003 | unsigned int *oldest_invalid_trans_id, |
bd4c625c LT |
2004 | unsigned long *newest_mount_id) |
2005 | { | |
2006 | struct reiserfs_journal_desc *desc; | |
2007 | struct reiserfs_journal_commit *commit; | |
2008 | struct buffer_head *c_bh; | |
2009 | unsigned long offset; | |
2010 | ||
2011 | if (!d_bh) | |
2012 | return 0; | |
2013 | ||
2014 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2015 | if (get_desc_trans_len(desc) > 0 | |
2016 | && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { | |
2017 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id | |
2018 | && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { | |
a9dd3643 | 2019 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2020 | "journal-986: transaction " |
2021 | "is valid returning because trans_id %d is greater than " | |
2022 | "oldest_invalid %lu", | |
2023 | get_desc_trans_id(desc), | |
2024 | *oldest_invalid_trans_id); | |
2025 | return 0; | |
2026 | } | |
2027 | if (newest_mount_id | |
2028 | && *newest_mount_id > get_desc_mount_id(desc)) { | |
a9dd3643 | 2029 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2030 | "journal-1087: transaction " |
2031 | "is valid returning because mount_id %d is less than " | |
2032 | "newest_mount_id %lu", | |
2033 | get_desc_mount_id(desc), | |
2034 | *newest_mount_id); | |
2035 | return -1; | |
2036 | } | |
a9dd3643 JM |
2037 | if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { |
2038 | reiserfs_warning(sb, "journal-2018", | |
45b03d5e JM |
2039 | "Bad transaction length %d " |
2040 | "encountered, ignoring transaction", | |
bd4c625c LT |
2041 | get_desc_trans_len(desc)); |
2042 | return -1; | |
2043 | } | |
a9dd3643 | 2044 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c | 2045 | |
098297b2 JM |
2046 | /* |
2047 | * ok, we have a journal description block, | |
2048 | * let's see if the transaction was valid | |
2049 | */ | |
bd4c625c | 2050 | c_bh = |
a9dd3643 JM |
2051 | journal_bread(sb, |
2052 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2053 | ((offset + get_desc_trans_len(desc) + |
a9dd3643 | 2054 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2055 | if (!c_bh) |
2056 | return 0; | |
2057 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2058 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2059 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2060 | "journal_transaction_is_valid, commit offset %ld had bad " |
2061 | "time %d or length %d", | |
2062 | c_bh->b_blocknr - | |
a9dd3643 | 2063 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2064 | get_commit_trans_id(commit), |
2065 | get_commit_trans_len(commit)); | |
2066 | brelse(c_bh); | |
2067 | if (oldest_invalid_trans_id) { | |
2068 | *oldest_invalid_trans_id = | |
2069 | get_desc_trans_id(desc); | |
a9dd3643 | 2070 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2071 | "journal-1004: " |
2072 | "transaction_is_valid setting oldest invalid trans_id " | |
2073 | "to %d", | |
2074 | get_desc_trans_id(desc)); | |
2075 | } | |
2076 | return -1; | |
2077 | } | |
2078 | brelse(c_bh); | |
a9dd3643 | 2079 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2080 | "journal-1006: found valid " |
2081 | "transaction start offset %llu, len %d id %d", | |
2082 | d_bh->b_blocknr - | |
a9dd3643 | 2083 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2084 | get_desc_trans_len(desc), |
2085 | get_desc_trans_id(desc)); | |
2086 | return 1; | |
2087 | } else { | |
2088 | return 0; | |
2089 | } | |
2090 | } | |
2091 | ||
2092 | static void brelse_array(struct buffer_head **heads, int num) | |
2093 | { | |
2094 | int i; | |
2095 | for (i = 0; i < num; i++) { | |
2096 | brelse(heads[i]); | |
2097 | } | |
1da177e4 LT |
2098 | } |
2099 | ||
2100 | /* | |
098297b2 JM |
2101 | * given the start, and values for the oldest acceptable transactions, |
2102 | * this either reads in a replays a transaction, or returns because the | |
2103 | * transaction is invalid, or too old. | |
2104 | * NOTE: only called during fs mount | |
2105 | */ | |
a9dd3643 | 2106 | static int journal_read_transaction(struct super_block *sb, |
bd4c625c LT |
2107 | unsigned long cur_dblock, |
2108 | unsigned long oldest_start, | |
600ed416 | 2109 | unsigned int oldest_trans_id, |
bd4c625c LT |
2110 | unsigned long newest_mount_id) |
2111 | { | |
a9dd3643 | 2112 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
2113 | struct reiserfs_journal_desc *desc; |
2114 | struct reiserfs_journal_commit *commit; | |
600ed416 | 2115 | unsigned int trans_id = 0; |
bd4c625c LT |
2116 | struct buffer_head *c_bh; |
2117 | struct buffer_head *d_bh; | |
2118 | struct buffer_head **log_blocks = NULL; | |
2119 | struct buffer_head **real_blocks = NULL; | |
600ed416 | 2120 | unsigned int trans_offset; |
bd4c625c LT |
2121 | int i; |
2122 | int trans_half; | |
2123 | ||
a9dd3643 | 2124 | d_bh = journal_bread(sb, cur_dblock); |
bd4c625c LT |
2125 | if (!d_bh) |
2126 | return 1; | |
2127 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
a9dd3643 JM |
2128 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2129 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " | |
bd4c625c | 2130 | "journal_read_transaction, offset %llu, len %d mount_id %d", |
a9dd3643 | 2131 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2132 | get_desc_trans_len(desc), get_desc_mount_id(desc)); |
2133 | if (get_desc_trans_id(desc) < oldest_trans_id) { | |
a9dd3643 | 2134 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " |
bd4c625c LT |
2135 | "journal_read_trans skipping because %lu is too old", |
2136 | cur_dblock - | |
a9dd3643 | 2137 | SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2138 | brelse(d_bh); |
2139 | return 1; | |
2140 | } | |
2141 | if (get_desc_mount_id(desc) != newest_mount_id) { | |
a9dd3643 | 2142 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " |
bd4c625c LT |
2143 | "journal_read_trans skipping because %d is != " |
2144 | "newest_mount_id %lu", get_desc_mount_id(desc), | |
2145 | newest_mount_id); | |
2146 | brelse(d_bh); | |
2147 | return 1; | |
2148 | } | |
a9dd3643 | 2149 | c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2150 | ((trans_offset + get_desc_trans_len(desc) + 1) % |
a9dd3643 | 2151 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2152 | if (!c_bh) { |
2153 | brelse(d_bh); | |
2154 | return 1; | |
2155 | } | |
2156 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2157 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2158 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2159 | "journal_read_transaction, " |
2160 | "commit offset %llu had bad time %d or length %d", | |
2161 | c_bh->b_blocknr - | |
a9dd3643 | 2162 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2163 | get_commit_trans_id(commit), |
2164 | get_commit_trans_len(commit)); | |
2165 | brelse(c_bh); | |
2166 | brelse(d_bh); | |
2167 | return 1; | |
2168 | } | |
3f8b5ee3 JM |
2169 | |
2170 | if (bdev_read_only(sb->s_bdev)) { | |
2171 | reiserfs_warning(sb, "clm-2076", | |
2172 | "device is readonly, unable to replay log"); | |
2173 | brelse(c_bh); | |
2174 | brelse(d_bh); | |
2175 | return -EROFS; | |
2176 | } | |
2177 | ||
bd4c625c | 2178 | trans_id = get_desc_trans_id(desc); |
098297b2 JM |
2179 | /* |
2180 | * now we know we've got a good transaction, and it was | |
2181 | * inside the valid time ranges | |
2182 | */ | |
6da2ec56 KC |
2183 | log_blocks = kmalloc_array(get_desc_trans_len(desc), |
2184 | sizeof(struct buffer_head *), | |
2185 | GFP_NOFS); | |
2186 | real_blocks = kmalloc_array(get_desc_trans_len(desc), | |
2187 | sizeof(struct buffer_head *), | |
2188 | GFP_NOFS); | |
bd4c625c LT |
2189 | if (!log_blocks || !real_blocks) { |
2190 | brelse(c_bh); | |
2191 | brelse(d_bh); | |
d739b42b PE |
2192 | kfree(log_blocks); |
2193 | kfree(real_blocks); | |
a9dd3643 | 2194 | reiserfs_warning(sb, "journal-1169", |
45b03d5e | 2195 | "kmalloc failed, unable to mount FS"); |
bd4c625c LT |
2196 | return -1; |
2197 | } | |
2198 | /* get all the buffer heads */ | |
a9dd3643 | 2199 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
2200 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
2201 | log_blocks[i] = | |
a9dd3643 JM |
2202 | journal_getblk(sb, |
2203 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2204 | (trans_offset + 1 + |
a9dd3643 | 2205 | i) % SB_ONDISK_JOURNAL_SIZE(sb)); |
bd4c625c LT |
2206 | if (i < trans_half) { |
2207 | real_blocks[i] = | |
a9dd3643 | 2208 | sb_getblk(sb, |
bd4c625c LT |
2209 | le32_to_cpu(desc->j_realblock[i])); |
2210 | } else { | |
2211 | real_blocks[i] = | |
a9dd3643 | 2212 | sb_getblk(sb, |
bd4c625c LT |
2213 | le32_to_cpu(commit-> |
2214 | j_realblock[i - trans_half])); | |
2215 | } | |
a9dd3643 JM |
2216 | if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { |
2217 | reiserfs_warning(sb, "journal-1207", | |
45b03d5e JM |
2218 | "REPLAY FAILURE fsck required! " |
2219 | "Block to replay is outside of " | |
2220 | "filesystem"); | |
bd4c625c LT |
2221 | goto abort_replay; |
2222 | } | |
2223 | /* make sure we don't try to replay onto log or reserved area */ | |
2224 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
2225 | (sb, real_blocks[i]->b_blocknr)) { |
2226 | reiserfs_warning(sb, "journal-1204", | |
45b03d5e JM |
2227 | "REPLAY FAILURE fsck required! " |
2228 | "Trying to replay onto a log block"); | |
cf776a7a | 2229 | abort_replay: |
bd4c625c LT |
2230 | brelse_array(log_blocks, i); |
2231 | brelse_array(real_blocks, i); | |
2232 | brelse(c_bh); | |
2233 | brelse(d_bh); | |
d739b42b PE |
2234 | kfree(log_blocks); |
2235 | kfree(real_blocks); | |
bd4c625c LT |
2236 | return -1; |
2237 | } | |
2238 | } | |
2239 | /* read in the log blocks, memcpy to the corresponding real block */ | |
dfec8a14 | 2240 | ll_rw_block(REQ_OP_READ, 0, get_desc_trans_len(desc), log_blocks); |
bd4c625c | 2241 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
8ebc4232 | 2242 | |
bd4c625c LT |
2243 | wait_on_buffer(log_blocks[i]); |
2244 | if (!buffer_uptodate(log_blocks[i])) { | |
a9dd3643 | 2245 | reiserfs_warning(sb, "journal-1212", |
45b03d5e JM |
2246 | "REPLAY FAILURE fsck required! " |
2247 | "buffer write failed"); | |
bd4c625c LT |
2248 | brelse_array(log_blocks + i, |
2249 | get_desc_trans_len(desc) - i); | |
2250 | brelse_array(real_blocks, get_desc_trans_len(desc)); | |
2251 | brelse(c_bh); | |
2252 | brelse(d_bh); | |
d739b42b PE |
2253 | kfree(log_blocks); |
2254 | kfree(real_blocks); | |
bd4c625c LT |
2255 | return -1; |
2256 | } | |
2257 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, | |
2258 | real_blocks[i]->b_size); | |
2259 | set_buffer_uptodate(real_blocks[i]); | |
2260 | brelse(log_blocks[i]); | |
2261 | } | |
2262 | /* flush out the real blocks */ | |
2263 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2264 | set_buffer_dirty(real_blocks[i]); | |
2a222ca9 | 2265 | write_dirty_buffer(real_blocks[i], 0); |
bd4c625c LT |
2266 | } |
2267 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2268 | wait_on_buffer(real_blocks[i]); | |
2269 | if (!buffer_uptodate(real_blocks[i])) { | |
a9dd3643 | 2270 | reiserfs_warning(sb, "journal-1226", |
45b03d5e JM |
2271 | "REPLAY FAILURE, fsck required! " |
2272 | "buffer write failed"); | |
bd4c625c LT |
2273 | brelse_array(real_blocks + i, |
2274 | get_desc_trans_len(desc) - i); | |
2275 | brelse(c_bh); | |
2276 | brelse(d_bh); | |
d739b42b PE |
2277 | kfree(log_blocks); |
2278 | kfree(real_blocks); | |
bd4c625c LT |
2279 | return -1; |
2280 | } | |
2281 | brelse(real_blocks[i]); | |
2282 | } | |
2283 | cur_dblock = | |
a9dd3643 | 2284 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2285 | ((trans_offset + get_desc_trans_len(desc) + |
a9dd3643 JM |
2286 | 2) % SB_ONDISK_JOURNAL_SIZE(sb)); |
2287 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c | 2288 | "journal-1095: setting journal " "start to offset %ld", |
a9dd3643 | 2289 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c | 2290 | |
098297b2 JM |
2291 | /* |
2292 | * init starting values for the first transaction, in case | |
2293 | * this is the last transaction to be replayed. | |
2294 | */ | |
a9dd3643 | 2295 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2296 | journal->j_last_flush_trans_id = trans_id; |
2297 | journal->j_trans_id = trans_id + 1; | |
a44c94a7 AZ |
2298 | /* check for trans_id overflow */ |
2299 | if (journal->j_trans_id == 0) | |
2300 | journal->j_trans_id = 10; | |
bd4c625c LT |
2301 | brelse(c_bh); |
2302 | brelse(d_bh); | |
d739b42b PE |
2303 | kfree(log_blocks); |
2304 | kfree(real_blocks); | |
bd4c625c | 2305 | return 0; |
1da177e4 LT |
2306 | } |
2307 | ||
098297b2 JM |
2308 | /* |
2309 | * This function reads blocks starting from block and to max_block of bufsize | |
2310 | * size (but no more than BUFNR blocks at a time). This proved to improve | |
2311 | * mounting speed on self-rebuilding raid5 arrays at least. | |
2312 | * Right now it is only used from journal code. But later we might use it | |
2313 | * from other places. | |
2314 | * Note: Do not use journal_getblk/sb_getblk functions here! | |
2315 | */ | |
3ee16670 JM |
2316 | static struct buffer_head *reiserfs_breada(struct block_device *dev, |
2317 | b_blocknr_t block, int bufsize, | |
2318 | b_blocknr_t max_block) | |
1da177e4 | 2319 | { |
bd4c625c | 2320 | struct buffer_head *bhlist[BUFNR]; |
1da177e4 | 2321 | unsigned int blocks = BUFNR; |
bd4c625c | 2322 | struct buffer_head *bh; |
1da177e4 | 2323 | int i, j; |
bd4c625c LT |
2324 | |
2325 | bh = __getblk(dev, block, bufsize); | |
2326 | if (buffer_uptodate(bh)) | |
2327 | return (bh); | |
2328 | ||
1da177e4 LT |
2329 | if (block + BUFNR > max_block) { |
2330 | blocks = max_block - block; | |
2331 | } | |
2332 | bhlist[0] = bh; | |
2333 | j = 1; | |
2334 | for (i = 1; i < blocks; i++) { | |
bd4c625c LT |
2335 | bh = __getblk(dev, block + i, bufsize); |
2336 | if (buffer_uptodate(bh)) { | |
2337 | brelse(bh); | |
1da177e4 | 2338 | break; |
bd4c625c LT |
2339 | } else |
2340 | bhlist[j++] = bh; | |
1da177e4 | 2341 | } |
dfec8a14 | 2342 | ll_rw_block(REQ_OP_READ, 0, j, bhlist); |
bd4c625c LT |
2343 | for (i = 1; i < j; i++) |
2344 | brelse(bhlist[i]); | |
1da177e4 | 2345 | bh = bhlist[0]; |
bd4c625c LT |
2346 | wait_on_buffer(bh); |
2347 | if (buffer_uptodate(bh)) | |
1da177e4 | 2348 | return bh; |
bd4c625c | 2349 | brelse(bh); |
1da177e4 LT |
2350 | return NULL; |
2351 | } | |
2352 | ||
2353 | /* | |
098297b2 JM |
2354 | * read and replay the log |
2355 | * on a clean unmount, the journal header's next unflushed pointer will be | |
2356 | * to an invalid transaction. This tests that before finding all the | |
2357 | * transactions in the log, which makes normal mount times fast. | |
2358 | * | |
2359 | * After a crash, this starts with the next unflushed transaction, and | |
2360 | * replays until it finds one too old, or invalid. | |
2361 | * | |
2362 | * On exit, it sets things up so the first transaction will work correctly. | |
2363 | * NOTE: only called during fs mount | |
2364 | */ | |
a9dd3643 | 2365 | static int journal_read(struct super_block *sb) |
bd4c625c | 2366 | { |
a9dd3643 | 2367 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 2368 | struct reiserfs_journal_desc *desc; |
600ed416 JM |
2369 | unsigned int oldest_trans_id = 0; |
2370 | unsigned int oldest_invalid_trans_id = 0; | |
34d08260 | 2371 | time64_t start; |
bd4c625c LT |
2372 | unsigned long oldest_start = 0; |
2373 | unsigned long cur_dblock = 0; | |
2374 | unsigned long newest_mount_id = 9; | |
2375 | struct buffer_head *d_bh; | |
2376 | struct reiserfs_journal_header *jh; | |
2377 | int valid_journal_header = 0; | |
2378 | int replay_count = 0; | |
2379 | int continue_replay = 1; | |
2380 | int ret; | |
bd4c625c | 2381 | |
a9dd3643 | 2382 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
a1c6f057 DM |
2383 | reiserfs_info(sb, "checking transaction log (%pg)\n", |
2384 | journal->j_dev_bd); | |
34d08260 | 2385 | start = ktime_get_seconds(); |
bd4c625c | 2386 | |
098297b2 JM |
2387 | /* |
2388 | * step 1, read in the journal header block. Check the transaction | |
2389 | * it says is the first unflushed, and if that transaction is not | |
2390 | * valid, replay is done | |
bd4c625c | 2391 | */ |
a9dd3643 JM |
2392 | journal->j_header_bh = journal_bread(sb, |
2393 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) | |
2394 | + SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c LT |
2395 | if (!journal->j_header_bh) { |
2396 | return 1; | |
2397 | } | |
2398 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); | |
c499ec24 | 2399 | if (le32_to_cpu(jh->j_first_unflushed_offset) < |
a9dd3643 | 2400 | SB_ONDISK_JOURNAL_SIZE(sb) |
bd4c625c LT |
2401 | && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { |
2402 | oldest_start = | |
a9dd3643 | 2403 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c LT |
2404 | le32_to_cpu(jh->j_first_unflushed_offset); |
2405 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2406 | newest_mount_id = le32_to_cpu(jh->j_mount_id); | |
a9dd3643 | 2407 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2408 | "journal-1153: found in " |
2409 | "header: first_unflushed_offset %d, last_flushed_trans_id " | |
2410 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), | |
2411 | le32_to_cpu(jh->j_last_flush_trans_id)); | |
2412 | valid_journal_header = 1; | |
2413 | ||
098297b2 JM |
2414 | /* |
2415 | * now, we try to read the first unflushed offset. If it | |
2416 | * is not valid, there is nothing more we can do, and it | |
2417 | * makes no sense to read through the whole log. | |
bd4c625c LT |
2418 | */ |
2419 | d_bh = | |
a9dd3643 JM |
2420 | journal_bread(sb, |
2421 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2422 | le32_to_cpu(jh->j_first_unflushed_offset)); |
a9dd3643 | 2423 | ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); |
bd4c625c LT |
2424 | if (!ret) { |
2425 | continue_replay = 0; | |
2426 | } | |
2427 | brelse(d_bh); | |
2428 | goto start_log_replay; | |
2429 | } | |
2430 | ||
098297b2 JM |
2431 | /* |
2432 | * ok, there are transactions that need to be replayed. start | |
2433 | * with the first log block, find all the valid transactions, and | |
2434 | * pick out the oldest. | |
bd4c625c LT |
2435 | */ |
2436 | while (continue_replay | |
2437 | && cur_dblock < | |
a9dd3643 JM |
2438 | (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
2439 | SB_ONDISK_JOURNAL_SIZE(sb))) { | |
098297b2 JM |
2440 | /* |
2441 | * Note that it is required for blocksize of primary fs | |
2442 | * device and journal device to be the same | |
2443 | */ | |
bd4c625c LT |
2444 | d_bh = |
2445 | reiserfs_breada(journal->j_dev_bd, cur_dblock, | |
a9dd3643 JM |
2446 | sb->s_blocksize, |
2447 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2448 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2449 | ret = |
a9dd3643 | 2450 | journal_transaction_is_valid(sb, d_bh, |
bd4c625c LT |
2451 | &oldest_invalid_trans_id, |
2452 | &newest_mount_id); | |
2453 | if (ret == 1) { | |
2454 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2455 | if (oldest_start == 0) { /* init all oldest_ values */ | |
2456 | oldest_trans_id = get_desc_trans_id(desc); | |
2457 | oldest_start = d_bh->b_blocknr; | |
2458 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2459 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2460 | "journal-1179: Setting " |
2461 | "oldest_start to offset %llu, trans_id %lu", | |
2462 | oldest_start - | |
2463 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2464 | (sb), oldest_trans_id); |
bd4c625c LT |
2465 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { |
2466 | /* one we just read was older */ | |
2467 | oldest_trans_id = get_desc_trans_id(desc); | |
2468 | oldest_start = d_bh->b_blocknr; | |
a9dd3643 | 2469 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2470 | "journal-1180: Resetting " |
2471 | "oldest_start to offset %lu, trans_id %lu", | |
2472 | oldest_start - | |
2473 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2474 | (sb), oldest_trans_id); |
bd4c625c LT |
2475 | } |
2476 | if (newest_mount_id < get_desc_mount_id(desc)) { | |
2477 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2478 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2479 | "journal-1299: Setting " |
2480 | "newest_mount_id to %d", | |
2481 | get_desc_mount_id(desc)); | |
2482 | } | |
2483 | cur_dblock += get_desc_trans_len(desc) + 2; | |
2484 | } else { | |
2485 | cur_dblock++; | |
2486 | } | |
2487 | brelse(d_bh); | |
2488 | } | |
2489 | ||
cf776a7a | 2490 | start_log_replay: |
bd4c625c LT |
2491 | cur_dblock = oldest_start; |
2492 | if (oldest_trans_id) { | |
a9dd3643 | 2493 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2494 | "journal-1206: Starting replay " |
2495 | "from offset %llu, trans_id %lu", | |
a9dd3643 | 2496 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2497 | oldest_trans_id); |
2498 | ||
2499 | } | |
2500 | replay_count = 0; | |
2501 | while (continue_replay && oldest_trans_id > 0) { | |
2502 | ret = | |
a9dd3643 | 2503 | journal_read_transaction(sb, cur_dblock, oldest_start, |
bd4c625c LT |
2504 | oldest_trans_id, newest_mount_id); |
2505 | if (ret < 0) { | |
2506 | return ret; | |
2507 | } else if (ret != 0) { | |
2508 | break; | |
2509 | } | |
2510 | cur_dblock = | |
a9dd3643 | 2511 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; |
bd4c625c LT |
2512 | replay_count++; |
2513 | if (cur_dblock == oldest_start) | |
2514 | break; | |
2515 | } | |
2516 | ||
2517 | if (oldest_trans_id == 0) { | |
a9dd3643 | 2518 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2519 | "journal-1225: No valid " "transactions found"); |
2520 | } | |
098297b2 JM |
2521 | /* |
2522 | * j_start does not get set correctly if we don't replay any | |
2523 | * transactions. if we had a valid journal_header, set j_start | |
2524 | * to the first unflushed transaction value, copy the trans_id | |
2525 | * from the header | |
bd4c625c LT |
2526 | */ |
2527 | if (valid_journal_header && replay_count == 0) { | |
2528 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); | |
2529 | journal->j_trans_id = | |
2530 | le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
a44c94a7 AZ |
2531 | /* check for trans_id overflow */ |
2532 | if (journal->j_trans_id == 0) | |
2533 | journal->j_trans_id = 10; | |
bd4c625c LT |
2534 | journal->j_last_flush_trans_id = |
2535 | le32_to_cpu(jh->j_last_flush_trans_id); | |
2536 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; | |
2537 | } else { | |
2538 | journal->j_mount_id = newest_mount_id + 1; | |
2539 | } | |
a9dd3643 | 2540 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " |
bd4c625c LT |
2541 | "newest_mount_id to %lu", journal->j_mount_id); |
2542 | journal->j_first_unflushed_offset = journal->j_start; | |
2543 | if (replay_count > 0) { | |
a9dd3643 | 2544 | reiserfs_info(sb, |
bd4c625c | 2545 | "replayed %d transactions in %lu seconds\n", |
34d08260 | 2546 | replay_count, ktime_get_seconds() - start); |
bd4c625c | 2547 | } |
278f6679 JM |
2548 | /* needed to satisfy the locking in _update_journal_header_block */ |
2549 | reiserfs_write_lock(sb); | |
a9dd3643 JM |
2550 | if (!bdev_read_only(sb->s_bdev) && |
2551 | _update_journal_header_block(sb, journal->j_start, | |
bd4c625c | 2552 | journal->j_last_flush_trans_id)) { |
278f6679 | 2553 | reiserfs_write_unlock(sb); |
098297b2 JM |
2554 | /* |
2555 | * replay failed, caller must call free_journal_ram and abort | |
2556 | * the mount | |
bd4c625c LT |
2557 | */ |
2558 | return -1; | |
2559 | } | |
278f6679 | 2560 | reiserfs_write_unlock(sb); |
bd4c625c | 2561 | return 0; |
1da177e4 LT |
2562 | } |
2563 | ||
2564 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) | |
2565 | { | |
bd4c625c | 2566 | struct reiserfs_journal_list *jl; |
8c777cc4 PE |
2567 | jl = kzalloc(sizeof(struct reiserfs_journal_list), |
2568 | GFP_NOFS | __GFP_NOFAIL); | |
bd4c625c LT |
2569 | INIT_LIST_HEAD(&jl->j_list); |
2570 | INIT_LIST_HEAD(&jl->j_working_list); | |
2571 | INIT_LIST_HEAD(&jl->j_tail_bh_list); | |
2572 | INIT_LIST_HEAD(&jl->j_bh_list); | |
90415dea | 2573 | mutex_init(&jl->j_commit_mutex); |
bd4c625c LT |
2574 | SB_JOURNAL(s)->j_num_lists++; |
2575 | get_journal_list(jl); | |
2576 | return jl; | |
2577 | } | |
2578 | ||
a9dd3643 | 2579 | static void journal_list_init(struct super_block *sb) |
bd4c625c | 2580 | { |
a9dd3643 | 2581 | SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
2582 | } |
2583 | ||
4385bab1 | 2584 | static void release_journal_dev(struct super_block *super, |
bd4c625c LT |
2585 | struct reiserfs_journal *journal) |
2586 | { | |
86098fa0 | 2587 | if (journal->j_dev_bd != NULL) { |
4385bab1 | 2588 | blkdev_put(journal->j_dev_bd, journal->j_dev_mode); |
bd4c625c LT |
2589 | journal->j_dev_bd = NULL; |
2590 | } | |
bd4c625c LT |
2591 | } |
2592 | ||
2593 | static int journal_init_dev(struct super_block *super, | |
2594 | struct reiserfs_journal *journal, | |
2595 | const char *jdev_name) | |
1da177e4 LT |
2596 | { |
2597 | int result; | |
2598 | dev_t jdev; | |
e525fd89 | 2599 | fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; |
1da177e4 LT |
2600 | |
2601 | result = 0; | |
2602 | ||
bd4c625c | 2603 | journal->j_dev_bd = NULL; |
bd4c625c LT |
2604 | jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? |
2605 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; | |
1da177e4 LT |
2606 | |
2607 | if (bdev_read_only(super->s_bdev)) | |
bd4c625c | 2608 | blkdev_mode = FMODE_READ; |
1da177e4 LT |
2609 | |
2610 | /* there is no "jdev" option and journal is on separate device */ | |
bd4c625c | 2611 | if ((!jdev_name || !jdev_name[0])) { |
e525fd89 TH |
2612 | if (jdev == super->s_dev) |
2613 | blkdev_mode &= ~FMODE_EXCL; | |
d4d77629 TH |
2614 | journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, |
2615 | journal); | |
e5eb8caa | 2616 | journal->j_dev_mode = blkdev_mode; |
1da177e4 LT |
2617 | if (IS_ERR(journal->j_dev_bd)) { |
2618 | result = PTR_ERR(journal->j_dev_bd); | |
2619 | journal->j_dev_bd = NULL; | |
45b03d5e | 2620 | reiserfs_warning(super, "sh-458", |
ea3edd4d CH |
2621 | "cannot init journal device unknown-block(%u,%u): %i", |
2622 | MAJOR(jdev), MINOR(jdev), result); | |
1da177e4 | 2623 | return result; |
e525fd89 | 2624 | } else if (jdev != super->s_dev) |
1da177e4 | 2625 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
86098fa0 | 2626 | |
1da177e4 LT |
2627 | return 0; |
2628 | } | |
2629 | ||
e5eb8caa | 2630 | journal->j_dev_mode = blkdev_mode; |
d4d77629 | 2631 | journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); |
86098fa0 CH |
2632 | if (IS_ERR(journal->j_dev_bd)) { |
2633 | result = PTR_ERR(journal->j_dev_bd); | |
2634 | journal->j_dev_bd = NULL; | |
9ad553ab | 2635 | reiserfs_warning(super, "sh-457", |
bd4c625c LT |
2636 | "journal_init_dev: Cannot open '%s': %i", |
2637 | jdev_name, result); | |
86098fa0 | 2638 | return result; |
1da177e4 | 2639 | } |
86098fa0 CH |
2640 | |
2641 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
2642 | reiserfs_info(super, | |
a1c6f057 DM |
2643 | "journal_init_dev: journal device: %pg\n", |
2644 | journal->j_dev_bd); | |
86098fa0 | 2645 | return 0; |
1da177e4 LT |
2646 | } |
2647 | ||
098297b2 | 2648 | /* |
cf3d0b81 ES |
2649 | * When creating/tuning a file system user can assign some |
2650 | * journal params within boundaries which depend on the ratio | |
2651 | * blocksize/standard_blocksize. | |
2652 | * | |
2653 | * For blocks >= standard_blocksize transaction size should | |
2654 | * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more | |
2655 | * then JOURNAL_TRANS_MAX_DEFAULT. | |
2656 | * | |
2657 | * For blocks < standard_blocksize these boundaries should be | |
2658 | * decreased proportionally. | |
2659 | */ | |
2660 | #define REISERFS_STANDARD_BLKSIZE (4096) | |
2661 | ||
a9dd3643 | 2662 | static int check_advise_trans_params(struct super_block *sb, |
cf3d0b81 ES |
2663 | struct reiserfs_journal *journal) |
2664 | { | |
2665 | if (journal->j_trans_max) { | |
098297b2 | 2666 | /* Non-default journal params. Do sanity check for them. */ |
cf3d0b81 | 2667 | int ratio = 1; |
a9dd3643 JM |
2668 | if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) |
2669 | ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; | |
cf3d0b81 ES |
2670 | |
2671 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || | |
2672 | journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || | |
a9dd3643 | 2673 | SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < |
cf3d0b81 | 2674 | JOURNAL_MIN_RATIO) { |
a9dd3643 | 2675 | reiserfs_warning(sb, "sh-462", |
45b03d5e JM |
2676 | "bad transaction max size (%u). " |
2677 | "FSCK?", journal->j_trans_max); | |
cf3d0b81 ES |
2678 | return 1; |
2679 | } | |
2680 | if (journal->j_max_batch != (journal->j_trans_max) * | |
2681 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { | |
a9dd3643 | 2682 | reiserfs_warning(sb, "sh-463", |
45b03d5e JM |
2683 | "bad transaction max batch (%u). " |
2684 | "FSCK?", journal->j_max_batch); | |
cf3d0b81 ES |
2685 | return 1; |
2686 | } | |
2687 | } else { | |
098297b2 JM |
2688 | /* |
2689 | * Default journal params. | |
2690 | * The file system was created by old version | |
2691 | * of mkreiserfs, so some fields contain zeros, | |
2692 | * and we need to advise proper values for them | |
2693 | */ | |
a9dd3643 JM |
2694 | if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { |
2695 | reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", | |
2696 | sb->s_blocksize); | |
45b03d5e JM |
2697 | return 1; |
2698 | } | |
cf3d0b81 ES |
2699 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; |
2700 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; | |
2701 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; | |
2702 | } | |
2703 | return 0; | |
2704 | } | |
2705 | ||
098297b2 | 2706 | /* must be called once on fs mount. calls journal_read for you */ |
a9dd3643 | 2707 | int journal_init(struct super_block *sb, const char *j_dev_name, |
bd4c625c LT |
2708 | int old_format, unsigned int commit_max_age) |
2709 | { | |
a9dd3643 | 2710 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; |
bd4c625c LT |
2711 | struct buffer_head *bhjh; |
2712 | struct reiserfs_super_block *rs; | |
2713 | struct reiserfs_journal_header *jh; | |
2714 | struct reiserfs_journal *journal; | |
2715 | struct reiserfs_journal_list *jl; | |
98ea3f50 | 2716 | int ret; |
bd4c625c | 2717 | |
558feb08 | 2718 | journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); |
bd4c625c | 2719 | if (!journal) { |
a9dd3643 | 2720 | reiserfs_warning(sb, "journal-1256", |
45b03d5e | 2721 | "unable to get memory for journal structure"); |
bd4c625c LT |
2722 | return 1; |
2723 | } | |
bd4c625c LT |
2724 | INIT_LIST_HEAD(&journal->j_bitmap_nodes); |
2725 | INIT_LIST_HEAD(&journal->j_prealloc_list); | |
2726 | INIT_LIST_HEAD(&journal->j_working_list); | |
2727 | INIT_LIST_HEAD(&journal->j_journal_list); | |
2728 | journal->j_persistent_trans = 0; | |
37c69b98 FW |
2729 | if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, |
2730 | reiserfs_bmap_count(sb))) | |
bd4c625c | 2731 | goto free_and_return; |
98ea3f50 | 2732 | |
a9dd3643 | 2733 | allocate_bitmap_nodes(sb); |
bd4c625c LT |
2734 | |
2735 | /* reserved for journal area support */ | |
a9dd3643 | 2736 | SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? |
bd4c625c | 2737 | REISERFS_OLD_DISK_OFFSET_IN_BYTES |
a9dd3643 JM |
2738 | / sb->s_blocksize + |
2739 | reiserfs_bmap_count(sb) + | |
bd4c625c LT |
2740 | 1 : |
2741 | REISERFS_DISK_OFFSET_IN_BYTES / | |
a9dd3643 | 2742 | sb->s_blocksize + 2); |
bd4c625c | 2743 | |
098297b2 JM |
2744 | /* |
2745 | * Sanity check to see is the standard journal fitting | |
2746 | * within first bitmap (actual for small blocksizes) | |
2747 | */ | |
a9dd3643 JM |
2748 | if (!SB_ONDISK_JOURNAL_DEVICE(sb) && |
2749 | (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + | |
2750 | SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { | |
2751 | reiserfs_warning(sb, "journal-1393", | |
45b03d5e JM |
2752 | "journal does not fit for area addressed " |
2753 | "by first of bitmap blocks. It starts at " | |
bd4c625c | 2754 | "%u and its size is %u. Block size %ld", |
a9dd3643 JM |
2755 | SB_JOURNAL_1st_RESERVED_BLOCK(sb), |
2756 | SB_ONDISK_JOURNAL_SIZE(sb), | |
2757 | sb->s_blocksize); | |
bd4c625c LT |
2758 | goto free_and_return; |
2759 | } | |
2760 | ||
a149127b PS |
2761 | /* |
2762 | * Sanity check to see if journal first block is correct. | |
2763 | * If journal first block is invalid it can cause | |
2764 | * zeroing important superblock members. | |
2765 | */ | |
2766 | if (!SB_ONDISK_JOURNAL_DEVICE(sb) && | |
2767 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) < SB_JOURNAL_1st_RESERVED_BLOCK(sb)) { | |
2768 | reiserfs_warning(sb, "journal-1393", | |
2769 | "journal 1st super block is invalid: 1st reserved block %d, but actual 1st block is %d", | |
2770 | SB_JOURNAL_1st_RESERVED_BLOCK(sb), | |
2771 | SB_ONDISK_JOURNAL_1st_BLOCK(sb)); | |
2772 | goto free_and_return; | |
2773 | } | |
2774 | ||
a9dd3643 JM |
2775 | if (journal_init_dev(sb, journal, j_dev_name) != 0) { |
2776 | reiserfs_warning(sb, "sh-462", | |
6774def6 | 2777 | "unable to initialize journal device"); |
bd4c625c LT |
2778 | goto free_and_return; |
2779 | } | |
2780 | ||
a9dd3643 | 2781 | rs = SB_DISK_SUPER_BLOCK(sb); |
bd4c625c LT |
2782 | |
2783 | /* read journal header */ | |
a9dd3643 JM |
2784 | bhjh = journal_bread(sb, |
2785 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2786 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2787 | if (!bhjh) { |
a9dd3643 | 2788 | reiserfs_warning(sb, "sh-459", |
45b03d5e | 2789 | "unable to read journal header"); |
bd4c625c LT |
2790 | goto free_and_return; |
2791 | } | |
2792 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); | |
2793 | ||
2794 | /* make sure that journal matches to the super block */ | |
2795 | if (is_reiserfs_jr(rs) | |
2796 | && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != | |
2797 | sb_jp_journal_magic(rs))) { | |
a9dd3643 | 2798 | reiserfs_warning(sb, "sh-460", |
a1c6f057 | 2799 | "journal header magic %x (device %pg) does " |
45b03d5e JM |
2800 | "not match to magic found in super block %x", |
2801 | jh->jh_journal.jp_journal_magic, | |
a1c6f057 | 2802 | journal->j_dev_bd, |
bd4c625c LT |
2803 | sb_jp_journal_magic(rs)); |
2804 | brelse(bhjh); | |
2805 | goto free_and_return; | |
2806 | } | |
2807 | ||
2808 | journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); | |
2809 | journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); | |
2810 | journal->j_max_commit_age = | |
2811 | le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); | |
2812 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
2813 | ||
a9dd3643 | 2814 | if (check_advise_trans_params(sb, journal) != 0) |
cf3d0b81 | 2815 | goto free_and_return; |
bd4c625c LT |
2816 | journal->j_default_max_commit_age = journal->j_max_commit_age; |
2817 | ||
2818 | if (commit_max_age != 0) { | |
2819 | journal->j_max_commit_age = commit_max_age; | |
2820 | journal->j_max_trans_age = commit_max_age; | |
2821 | } | |
2822 | ||
a1c6f057 | 2823 | reiserfs_info(sb, "journal params: device %pg, size %u, " |
bd4c625c LT |
2824 | "journal first block %u, max trans len %u, max batch %u, " |
2825 | "max commit age %u, max trans age %u\n", | |
a1c6f057 | 2826 | journal->j_dev_bd, |
a9dd3643 JM |
2827 | SB_ONDISK_JOURNAL_SIZE(sb), |
2828 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), | |
bd4c625c LT |
2829 | journal->j_trans_max, |
2830 | journal->j_max_batch, | |
2831 | journal->j_max_commit_age, journal->j_max_trans_age); | |
2832 | ||
2833 | brelse(bhjh); | |
2834 | ||
2835 | journal->j_list_bitmap_index = 0; | |
a9dd3643 | 2836 | journal_list_init(sb); |
bd4c625c LT |
2837 | |
2838 | memset(journal->j_list_hash_table, 0, | |
2839 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
2840 | ||
2841 | INIT_LIST_HEAD(&journal->j_dirty_buffers); | |
2842 | spin_lock_init(&journal->j_dirty_buffers_lock); | |
2843 | ||
2844 | journal->j_start = 0; | |
2845 | journal->j_len = 0; | |
2846 | journal->j_len_alloc = 0; | |
a228bf8f JM |
2847 | atomic_set(&journal->j_wcount, 0); |
2848 | atomic_set(&journal->j_async_throttle, 0); | |
bd4c625c LT |
2849 | journal->j_bcount = 0; |
2850 | journal->j_trans_start_time = 0; | |
2851 | journal->j_last = NULL; | |
2852 | journal->j_first = NULL; | |
a228bf8f | 2853 | init_waitqueue_head(&journal->j_join_wait); |
f68215c4 | 2854 | mutex_init(&journal->j_mutex); |
afe70259 | 2855 | mutex_init(&journal->j_flush_mutex); |
bd4c625c LT |
2856 | |
2857 | journal->j_trans_id = 10; | |
2858 | journal->j_mount_id = 10; | |
2859 | journal->j_state = 0; | |
a228bf8f | 2860 | atomic_set(&journal->j_jlock, 0); |
bd4c625c LT |
2861 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes); |
2862 | journal->j_cnode_free_orig = journal->j_cnode_free_list; | |
2863 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; | |
2864 | journal->j_cnode_used = 0; | |
2865 | journal->j_must_wait = 0; | |
2866 | ||
576f6d79 | 2867 | if (journal->j_cnode_free == 0) { |
a9dd3643 | 2868 | reiserfs_warning(sb, "journal-2004", "Journal cnode memory " |
576f6d79 JM |
2869 | "allocation failed (%ld bytes). Journal is " |
2870 | "too large for available memory. Usually " | |
2871 | "this is due to a journal that is too large.", | |
2872 | sizeof (struct reiserfs_journal_cnode) * num_cnodes); | |
2873 | goto free_and_return; | |
2874 | } | |
2875 | ||
a9dd3643 | 2876 | init_journal_hash(sb); |
bd4c625c | 2877 | jl = journal->j_current_jl; |
37c69b98 FW |
2878 | |
2879 | /* | |
2880 | * get_list_bitmap() may call flush_commit_list() which | |
2881 | * requires the lock. Calling flush_commit_list() shouldn't happen | |
2882 | * this early but I like to be paranoid. | |
2883 | */ | |
2884 | reiserfs_write_lock(sb); | |
a9dd3643 | 2885 | jl->j_list_bitmap = get_list_bitmap(sb, jl); |
37c69b98 | 2886 | reiserfs_write_unlock(sb); |
bd4c625c | 2887 | if (!jl->j_list_bitmap) { |
a9dd3643 | 2888 | reiserfs_warning(sb, "journal-2005", |
45b03d5e | 2889 | "get_list_bitmap failed for journal list 0"); |
bd4c625c LT |
2890 | goto free_and_return; |
2891 | } | |
37c69b98 | 2892 | |
37c69b98 | 2893 | ret = journal_read(sb); |
37c69b98 | 2894 | if (ret < 0) { |
a9dd3643 | 2895 | reiserfs_warning(sb, "reiserfs-2006", |
45b03d5e | 2896 | "Replay Failure, unable to mount"); |
bd4c625c LT |
2897 | goto free_and_return; |
2898 | } | |
2899 | ||
c4028958 | 2900 | INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); |
a9dd3643 | 2901 | journal->j_work_sb = sb; |
bd4c625c | 2902 | return 0; |
cf776a7a | 2903 | free_and_return: |
a9dd3643 | 2904 | free_journal_ram(sb); |
bd4c625c | 2905 | return 1; |
1da177e4 LT |
2906 | } |
2907 | ||
2908 | /* | |
098297b2 JM |
2909 | * test for a polite end of the current transaction. Used by file_write, |
2910 | * and should be used by delete to make sure they don't write more than | |
2911 | * can fit inside a single transaction | |
2912 | */ | |
bd4c625c LT |
2913 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, |
2914 | int new_alloc) | |
2915 | { | |
2916 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
34d08260 | 2917 | time64_t now = ktime_get_seconds(); |
bd4c625c LT |
2918 | /* cannot restart while nested */ |
2919 | BUG_ON(!th->t_trans_id); | |
2920 | if (th->t_refcount > 1) | |
2921 | return 0; | |
2922 | if (journal->j_must_wait > 0 || | |
2923 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || | |
a228bf8f | 2924 | atomic_read(&journal->j_jlock) || |
bd4c625c LT |
2925 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || |
2926 | journal->j_cnode_free < (journal->j_trans_max * 3)) { | |
2927 | return 1; | |
2928 | } | |
b18c1c6e | 2929 | |
6ae1ea44 CM |
2930 | journal->j_len_alloc += new_alloc; |
2931 | th->t_blocks_allocated += new_alloc ; | |
bd4c625c | 2932 | return 0; |
1da177e4 LT |
2933 | } |
2934 | ||
098297b2 | 2935 | /* this must be called inside a transaction */ |
bd4c625c LT |
2936 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) |
2937 | { | |
2938 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2939 | BUG_ON(!th->t_trans_id); | |
2940 | journal->j_must_wait = 1; | |
2941 | set_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2942 | return; | |
1da177e4 LT |
2943 | } |
2944 | ||
098297b2 | 2945 | /* this must be called without a transaction started */ |
bd4c625c LT |
2946 | void reiserfs_allow_writes(struct super_block *s) |
2947 | { | |
2948 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2949 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2950 | wake_up(&journal->j_join_wait); | |
1da177e4 LT |
2951 | } |
2952 | ||
098297b2 | 2953 | /* this must be called without a transaction started */ |
bd4c625c LT |
2954 | void reiserfs_wait_on_write_block(struct super_block *s) |
2955 | { | |
2956 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2957 | wait_event(journal->j_join_wait, | |
2958 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); | |
2959 | } | |
2960 | ||
2961 | static void queue_log_writer(struct super_block *s) | |
2962 | { | |
ac6424b9 | 2963 | wait_queue_entry_t wait; |
bd4c625c LT |
2964 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
2965 | set_bit(J_WRITERS_QUEUED, &journal->j_state); | |
2966 | ||
2967 | /* | |
2968 | * we don't want to use wait_event here because | |
2969 | * we only want to wait once. | |
2970 | */ | |
2971 | init_waitqueue_entry(&wait, current); | |
2972 | add_wait_queue(&journal->j_join_wait, &wait); | |
1da177e4 | 2973 | set_current_state(TASK_UNINTERRUPTIBLE); |
8ebc4232 | 2974 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { |
278f6679 | 2975 | int depth = reiserfs_write_unlock_nested(s); |
bd4c625c | 2976 | schedule(); |
278f6679 | 2977 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 2978 | } |
5ab2f7e0 | 2979 | __set_current_state(TASK_RUNNING); |
bd4c625c LT |
2980 | remove_wait_queue(&journal->j_join_wait, &wait); |
2981 | } | |
2982 | ||
2983 | static void wake_queued_writers(struct super_block *s) | |
2984 | { | |
2985 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2986 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2987 | wake_up(&journal->j_join_wait); | |
2988 | } | |
2989 | ||
600ed416 | 2990 | static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) |
bd4c625c LT |
2991 | { |
2992 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
2993 | unsigned long bcount = journal->j_bcount; | |
2994 | while (1) { | |
278f6679 JM |
2995 | int depth; |
2996 | ||
2997 | depth = reiserfs_write_unlock_nested(sb); | |
041e0e3b | 2998 | schedule_timeout_uninterruptible(1); |
278f6679 JM |
2999 | reiserfs_write_lock_nested(sb, depth); |
3000 | ||
bd4c625c LT |
3001 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; |
3002 | while ((atomic_read(&journal->j_wcount) > 0 || | |
3003 | atomic_read(&journal->j_jlock)) && | |
3004 | journal->j_trans_id == trans_id) { | |
3005 | queue_log_writer(sb); | |
3006 | } | |
3007 | if (journal->j_trans_id != trans_id) | |
3008 | break; | |
3009 | if (bcount == journal->j_bcount) | |
3010 | break; | |
3011 | bcount = journal->j_bcount; | |
1da177e4 | 3012 | } |
1da177e4 LT |
3013 | } |
3014 | ||
098297b2 JM |
3015 | /* |
3016 | * join == true if you must join an existing transaction. | |
3017 | * join == false if you can deal with waiting for others to finish | |
3018 | * | |
3019 | * this will block until the transaction is joinable. send the number of | |
3020 | * blocks you expect to use in nblocks. | |
1da177e4 | 3021 | */ |
bd4c625c | 3022 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3023 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3024 | int join) |
3025 | { | |
34d08260 | 3026 | time64_t now = ktime_get_seconds(); |
600ed416 | 3027 | unsigned int old_trans_id; |
a9dd3643 | 3028 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3029 | struct reiserfs_transaction_handle myth; |
3030 | int sched_count = 0; | |
3031 | int retval; | |
278f6679 | 3032 | int depth; |
bd4c625c | 3033 | |
a9dd3643 | 3034 | reiserfs_check_lock_depth(sb, "journal_begin"); |
14a61442 | 3035 | BUG_ON(nblocks > journal->j_trans_max); |
bd4c625c | 3036 | |
a9dd3643 | 3037 | PROC_INFO_INC(sb, journal.journal_being); |
bd4c625c LT |
3038 | /* set here for journal_join */ |
3039 | th->t_refcount = 1; | |
a9dd3643 | 3040 | th->t_super = sb; |
bd4c625c | 3041 | |
cf776a7a | 3042 | relock: |
a9dd3643 | 3043 | lock_journal(sb); |
bd4c625c | 3044 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { |
a9dd3643 | 3045 | unlock_journal(sb); |
bd4c625c LT |
3046 | retval = journal->j_errno; |
3047 | goto out_fail; | |
3048 | } | |
3049 | journal->j_bcount++; | |
3050 | ||
3051 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { | |
a9dd3643 | 3052 | unlock_journal(sb); |
278f6679 | 3053 | depth = reiserfs_write_unlock_nested(sb); |
a9dd3643 | 3054 | reiserfs_wait_on_write_block(sb); |
278f6679 | 3055 | reiserfs_write_lock_nested(sb, depth); |
a9dd3643 | 3056 | PROC_INFO_INC(sb, journal.journal_relock_writers); |
bd4c625c LT |
3057 | goto relock; |
3058 | } | |
34d08260 | 3059 | now = ktime_get_seconds(); |
bd4c625c | 3060 | |
098297b2 JM |
3061 | /* |
3062 | * if there is no room in the journal OR | |
3063 | * if this transaction is too old, and we weren't called joinable, | |
3064 | * wait for it to finish before beginning we don't sleep if there | |
3065 | * aren't other writers | |
bd4c625c LT |
3066 | */ |
3067 | ||
3068 | if ((!join && journal->j_must_wait > 0) || | |
3069 | (!join | |
3070 | && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) | |
3071 | || (!join && atomic_read(&journal->j_wcount) > 0 | |
3072 | && journal->j_trans_start_time > 0 | |
3073 | && (now - journal->j_trans_start_time) > | |
3074 | journal->j_max_trans_age) || (!join | |
3075 | && atomic_read(&journal->j_jlock)) | |
3076 | || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { | |
3077 | ||
3078 | old_trans_id = journal->j_trans_id; | |
098297b2 JM |
3079 | /* allow others to finish this transaction */ |
3080 | unlock_journal(sb); | |
bd4c625c LT |
3081 | |
3082 | if (!join && (journal->j_len_alloc + nblocks + 2) >= | |
3083 | journal->j_max_batch && | |
3084 | ((journal->j_len + nblocks + 2) * 100) < | |
3085 | (journal->j_len_alloc * 75)) { | |
3086 | if (atomic_read(&journal->j_wcount) > 10) { | |
3087 | sched_count++; | |
a9dd3643 | 3088 | queue_log_writer(sb); |
bd4c625c LT |
3089 | goto relock; |
3090 | } | |
3091 | } | |
098297b2 JM |
3092 | /* |
3093 | * don't mess with joining the transaction if all we | |
3094 | * have to do is wait for someone else to do a commit | |
bd4c625c LT |
3095 | */ |
3096 | if (atomic_read(&journal->j_jlock)) { | |
3097 | while (journal->j_trans_id == old_trans_id && | |
3098 | atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3099 | queue_log_writer(sb); |
bd4c625c LT |
3100 | } |
3101 | goto relock; | |
3102 | } | |
b491dd17 | 3103 | retval = journal_join(&myth, sb); |
bd4c625c LT |
3104 | if (retval) |
3105 | goto out_fail; | |
3106 | ||
3107 | /* someone might have ended the transaction while we joined */ | |
3108 | if (old_trans_id != journal->j_trans_id) { | |
58d85426 | 3109 | retval = do_journal_end(&myth, 0); |
bd4c625c | 3110 | } else { |
58d85426 | 3111 | retval = do_journal_end(&myth, COMMIT_NOW); |
bd4c625c LT |
3112 | } |
3113 | ||
3114 | if (retval) | |
3115 | goto out_fail; | |
3116 | ||
a9dd3643 | 3117 | PROC_INFO_INC(sb, journal.journal_relock_wcount); |
bd4c625c LT |
3118 | goto relock; |
3119 | } | |
3120 | /* we are the first writer, set trans_id */ | |
3121 | if (journal->j_trans_start_time == 0) { | |
34d08260 | 3122 | journal->j_trans_start_time = ktime_get_seconds(); |
bd4c625c | 3123 | } |
a228bf8f | 3124 | atomic_inc(&journal->j_wcount); |
bd4c625c LT |
3125 | journal->j_len_alloc += nblocks; |
3126 | th->t_blocks_logged = 0; | |
3127 | th->t_blocks_allocated = nblocks; | |
3128 | th->t_trans_id = journal->j_trans_id; | |
a9dd3643 | 3129 | unlock_journal(sb); |
bd4c625c | 3130 | INIT_LIST_HEAD(&th->t_list); |
bd4c625c LT |
3131 | return 0; |
3132 | ||
cf776a7a | 3133 | out_fail: |
bd4c625c | 3134 | memset(th, 0, sizeof(*th)); |
098297b2 JM |
3135 | /* |
3136 | * Re-set th->t_super, so we can properly keep track of how many | |
bd4c625c | 3137 | * persistent transactions there are. We need to do this so if this |
098297b2 JM |
3138 | * call is part of a failed restart_transaction, we can free it later |
3139 | */ | |
a9dd3643 | 3140 | th->t_super = sb; |
bd4c625c LT |
3141 | return retval; |
3142 | } | |
3143 | ||
3144 | struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct | |
3145 | super_block | |
3146 | *s, | |
3147 | int nblocks) | |
3148 | { | |
3149 | int ret; | |
3150 | struct reiserfs_transaction_handle *th; | |
3151 | ||
098297b2 JM |
3152 | /* |
3153 | * if we're nesting into an existing transaction. It will be | |
3154 | * persistent on its own | |
bd4c625c LT |
3155 | */ |
3156 | if (reiserfs_transaction_running(s)) { | |
3157 | th = current->journal_info; | |
3158 | th->t_refcount++; | |
14a61442 | 3159 | BUG_ON(th->t_refcount < 2); |
098297b2 | 3160 | |
bd4c625c LT |
3161 | return th; |
3162 | } | |
d739b42b | 3163 | th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); |
bd4c625c LT |
3164 | if (!th) |
3165 | return NULL; | |
3166 | ret = journal_begin(th, s, nblocks); | |
3167 | if (ret) { | |
d739b42b | 3168 | kfree(th); |
bd4c625c LT |
3169 | return NULL; |
3170 | } | |
3171 | ||
3172 | SB_JOURNAL(s)->j_persistent_trans++; | |
3173 | return th; | |
3174 | } | |
3175 | ||
3176 | int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) | |
3177 | { | |
3178 | struct super_block *s = th->t_super; | |
3179 | int ret = 0; | |
3180 | if (th->t_trans_id) | |
58d85426 | 3181 | ret = journal_end(th); |
bd4c625c LT |
3182 | else |
3183 | ret = -EIO; | |
3184 | if (th->t_refcount == 0) { | |
3185 | SB_JOURNAL(s)->j_persistent_trans--; | |
d739b42b | 3186 | kfree(th); |
bd4c625c LT |
3187 | } |
3188 | return ret; | |
3189 | } | |
3190 | ||
3191 | static int journal_join(struct reiserfs_transaction_handle *th, | |
b491dd17 | 3192 | struct super_block *sb) |
bd4c625c LT |
3193 | { |
3194 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3195 | ||
098297b2 JM |
3196 | /* |
3197 | * this keeps do_journal_end from NULLing out the | |
3198 | * current->journal_info pointer | |
bd4c625c LT |
3199 | */ |
3200 | th->t_handle_save = cur_th; | |
14a61442 | 3201 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
b491dd17 | 3202 | return do_journal_begin_r(th, sb, 1, JBEGIN_JOIN); |
bd4c625c LT |
3203 | } |
3204 | ||
3205 | int journal_join_abort(struct reiserfs_transaction_handle *th, | |
b491dd17 | 3206 | struct super_block *sb) |
bd4c625c LT |
3207 | { |
3208 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3209 | ||
098297b2 JM |
3210 | /* |
3211 | * this keeps do_journal_end from NULLing out the | |
3212 | * current->journal_info pointer | |
bd4c625c LT |
3213 | */ |
3214 | th->t_handle_save = cur_th; | |
14a61442 | 3215 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
b491dd17 | 3216 | return do_journal_begin_r(th, sb, 1, JBEGIN_ABORT); |
bd4c625c LT |
3217 | } |
3218 | ||
3219 | int journal_begin(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3220 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3221 | { |
3222 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3223 | int ret; | |
3224 | ||
3225 | th->t_handle_save = NULL; | |
3226 | if (cur_th) { | |
3227 | /* we are nesting into the current transaction */ | |
a9dd3643 | 3228 | if (cur_th->t_super == sb) { |
bd4c625c LT |
3229 | BUG_ON(!cur_th->t_refcount); |
3230 | cur_th->t_refcount++; | |
3231 | memcpy(th, cur_th, sizeof(*th)); | |
3232 | if (th->t_refcount <= 1) | |
a9dd3643 | 3233 | reiserfs_warning(sb, "reiserfs-2005", |
45b03d5e JM |
3234 | "BAD: refcount <= 1, but " |
3235 | "journal_info != 0"); | |
bd4c625c LT |
3236 | return 0; |
3237 | } else { | |
098297b2 JM |
3238 | /* |
3239 | * we've ended up with a handle from a different | |
3240 | * filesystem. save it and restore on journal_end. | |
3241 | * This should never really happen... | |
bd4c625c | 3242 | */ |
a9dd3643 | 3243 | reiserfs_warning(sb, "clm-2100", |
45b03d5e | 3244 | "nesting info a different FS"); |
bd4c625c LT |
3245 | th->t_handle_save = current->journal_info; |
3246 | current->journal_info = th; | |
3247 | } | |
1da177e4 | 3248 | } else { |
bd4c625c LT |
3249 | current->journal_info = th; |
3250 | } | |
a9dd3643 | 3251 | ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); |
14a61442 | 3252 | BUG_ON(current->journal_info != th); |
1da177e4 | 3253 | |
098297b2 JM |
3254 | /* |
3255 | * I guess this boils down to being the reciprocal of clm-2100 above. | |
3256 | * If do_journal_begin_r fails, we need to put it back, since | |
3257 | * journal_end won't be called to do it. */ | |
bd4c625c LT |
3258 | if (ret) |
3259 | current->journal_info = th->t_handle_save; | |
3260 | else | |
3261 | BUG_ON(!th->t_refcount); | |
1da177e4 | 3262 | |
bd4c625c | 3263 | return ret; |
1da177e4 LT |
3264 | } |
3265 | ||
3266 | /* | |
098297b2 JM |
3267 | * puts bh into the current transaction. If it was already there, reorders |
3268 | * removes the old pointers from the hash, and puts new ones in (to make | |
3269 | * sure replay happen in the right order). | |
3270 | * | |
3271 | * if it was dirty, cleans and files onto the clean list. I can't let it | |
3272 | * be dirty again until the transaction is committed. | |
3273 | * | |
3274 | * if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. | |
3275 | */ | |
bd4c625c | 3276 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, |
09f1b80b | 3277 | struct buffer_head *bh) |
bd4c625c | 3278 | { |
09f1b80b | 3279 | struct super_block *sb = th->t_super; |
a9dd3643 | 3280 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3281 | struct reiserfs_journal_cnode *cn = NULL; |
3282 | int count_already_incd = 0; | |
3283 | int prepared = 0; | |
3284 | BUG_ON(!th->t_trans_id); | |
3285 | ||
a9dd3643 | 3286 | PROC_INFO_INC(sb, journal.mark_dirty); |
bd4c625c | 3287 | if (th->t_trans_id != journal->j_trans_id) { |
c3a9c210 JM |
3288 | reiserfs_panic(th->t_super, "journal-1577", |
3289 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3290 | th->t_trans_id, journal->j_trans_id); |
3291 | } | |
3292 | ||
bd4c625c LT |
3293 | prepared = test_clear_buffer_journal_prepared(bh); |
3294 | clear_buffer_journal_restore_dirty(bh); | |
3295 | /* already in this transaction, we are done */ | |
3296 | if (buffer_journaled(bh)) { | |
a9dd3643 | 3297 | PROC_INFO_INC(sb, journal.mark_dirty_already); |
bd4c625c LT |
3298 | return 0; |
3299 | } | |
3300 | ||
098297b2 JM |
3301 | /* |
3302 | * this must be turned into a panic instead of a warning. We can't | |
3303 | * allow a dirty or journal_dirty or locked buffer to be logged, as | |
3304 | * some changes could get to disk too early. NOT GOOD. | |
bd4c625c LT |
3305 | */ |
3306 | if (!prepared || buffer_dirty(bh)) { | |
a9dd3643 | 3307 | reiserfs_warning(sb, "journal-1777", |
45b03d5e | 3308 | "buffer %llu bad state " |
bd4c625c LT |
3309 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", |
3310 | (unsigned long long)bh->b_blocknr, | |
3311 | prepared ? ' ' : '!', | |
3312 | buffer_locked(bh) ? ' ' : '!', | |
3313 | buffer_dirty(bh) ? ' ' : '!', | |
3314 | buffer_journal_dirty(bh) ? ' ' : '!'); | |
3315 | } | |
3316 | ||
a228bf8f | 3317 | if (atomic_read(&journal->j_wcount) <= 0) { |
a9dd3643 | 3318 | reiserfs_warning(sb, "journal-1409", |
45b03d5e | 3319 | "returning because j_wcount was %d", |
a228bf8f | 3320 | atomic_read(&journal->j_wcount)); |
bd4c625c LT |
3321 | return 1; |
3322 | } | |
098297b2 JM |
3323 | /* |
3324 | * this error means I've screwed up, and we've overflowed | |
3325 | * the transaction. Nothing can be done here, except make the | |
3326 | * FS readonly or panic. | |
bd4c625c LT |
3327 | */ |
3328 | if (journal->j_len >= journal->j_trans_max) { | |
c3a9c210 JM |
3329 | reiserfs_panic(th->t_super, "journal-1413", |
3330 | "j_len (%lu) is too big", | |
bd4c625c LT |
3331 | journal->j_len); |
3332 | } | |
3333 | ||
3334 | if (buffer_journal_dirty(bh)) { | |
3335 | count_already_incd = 1; | |
a9dd3643 | 3336 | PROC_INFO_INC(sb, journal.mark_dirty_notjournal); |
bd4c625c LT |
3337 | clear_buffer_journal_dirty(bh); |
3338 | } | |
3339 | ||
3340 | if (journal->j_len > journal->j_len_alloc) { | |
3341 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; | |
3342 | } | |
3343 | ||
3344 | set_buffer_journaled(bh); | |
3345 | ||
3346 | /* now put this guy on the end */ | |
3347 | if (!cn) { | |
a9dd3643 | 3348 | cn = get_cnode(sb); |
bd4c625c | 3349 | if (!cn) { |
a9dd3643 | 3350 | reiserfs_panic(sb, "journal-4", "get_cnode failed!"); |
bd4c625c LT |
3351 | } |
3352 | ||
3353 | if (th->t_blocks_logged == th->t_blocks_allocated) { | |
3354 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; | |
3355 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; | |
3356 | } | |
3357 | th->t_blocks_logged++; | |
3358 | journal->j_len++; | |
3359 | ||
3360 | cn->bh = bh; | |
3361 | cn->blocknr = bh->b_blocknr; | |
a9dd3643 | 3362 | cn->sb = sb; |
bd4c625c LT |
3363 | cn->jlist = NULL; |
3364 | insert_journal_hash(journal->j_hash_table, cn); | |
3365 | if (!count_already_incd) { | |
3366 | get_bh(bh); | |
3367 | } | |
3368 | } | |
3369 | cn->next = NULL; | |
3370 | cn->prev = journal->j_last; | |
3371 | cn->bh = bh; | |
3372 | if (journal->j_last) { | |
3373 | journal->j_last->next = cn; | |
3374 | journal->j_last = cn; | |
3375 | } else { | |
3376 | journal->j_first = cn; | |
3377 | journal->j_last = cn; | |
3378 | } | |
033369d1 | 3379 | reiserfs_schedule_old_flush(sb); |
bd4c625c LT |
3380 | return 0; |
3381 | } | |
3382 | ||
58d85426 | 3383 | int journal_end(struct reiserfs_transaction_handle *th) |
bd4c625c | 3384 | { |
58d85426 | 3385 | struct super_block *sb = th->t_super; |
bd4c625c | 3386 | if (!current->journal_info && th->t_refcount > 1) |
a9dd3643 | 3387 | reiserfs_warning(sb, "REISER-NESTING", |
45b03d5e | 3388 | "th NULL, refcount %d", th->t_refcount); |
bd4c625c LT |
3389 | |
3390 | if (!th->t_trans_id) { | |
3391 | WARN_ON(1); | |
3392 | return -EIO; | |
3393 | } | |
3394 | ||
3395 | th->t_refcount--; | |
3396 | if (th->t_refcount > 0) { | |
3397 | struct reiserfs_transaction_handle *cur_th = | |
3398 | current->journal_info; | |
3399 | ||
098297b2 JM |
3400 | /* |
3401 | * we aren't allowed to close a nested transaction on a | |
3402 | * different filesystem from the one in the task struct | |
bd4c625c | 3403 | */ |
14a61442 | 3404 | BUG_ON(cur_th->t_super != th->t_super); |
bd4c625c LT |
3405 | |
3406 | if (th != cur_th) { | |
3407 | memcpy(current->journal_info, th, sizeof(*th)); | |
3408 | th->t_trans_id = 0; | |
3409 | } | |
3410 | return 0; | |
3411 | } else { | |
58d85426 | 3412 | return do_journal_end(th, 0); |
bd4c625c | 3413 | } |
1da177e4 LT |
3414 | } |
3415 | ||
098297b2 JM |
3416 | /* |
3417 | * removes from the current transaction, relsing and descrementing any counters. | |
3418 | * also files the removed buffer directly onto the clean list | |
3419 | * | |
3420 | * called by journal_mark_freed when a block has been deleted | |
3421 | * | |
3422 | * returns 1 if it cleaned and relsed the buffer. 0 otherwise | |
3423 | */ | |
a9dd3643 | 3424 | static int remove_from_transaction(struct super_block *sb, |
bd4c625c LT |
3425 | b_blocknr_t blocknr, int already_cleaned) |
3426 | { | |
3427 | struct buffer_head *bh; | |
3428 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3429 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3430 | int ret = 0; |
3431 | ||
a9dd3643 | 3432 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3433 | if (!cn || !cn->bh) { |
3434 | return ret; | |
3435 | } | |
3436 | bh = cn->bh; | |
3437 | if (cn->prev) { | |
3438 | cn->prev->next = cn->next; | |
3439 | } | |
3440 | if (cn->next) { | |
3441 | cn->next->prev = cn->prev; | |
3442 | } | |
3443 | if (cn == journal->j_first) { | |
3444 | journal->j_first = cn->next; | |
3445 | } | |
3446 | if (cn == journal->j_last) { | |
3447 | journal->j_last = cn->prev; | |
3448 | } | |
d256085b JJB |
3449 | remove_journal_hash(sb, journal->j_hash_table, NULL, |
3450 | bh->b_blocknr, 0); | |
bd4c625c LT |
3451 | clear_buffer_journaled(bh); /* don't log this one */ |
3452 | ||
3453 | if (!already_cleaned) { | |
3454 | clear_buffer_journal_dirty(bh); | |
3455 | clear_buffer_dirty(bh); | |
3456 | clear_buffer_journal_test(bh); | |
3457 | put_bh(bh); | |
a228bf8f | 3458 | if (atomic_read(&bh->b_count) < 0) { |
a9dd3643 | 3459 | reiserfs_warning(sb, "journal-1752", |
45b03d5e | 3460 | "b_count < 0"); |
bd4c625c LT |
3461 | } |
3462 | ret = 1; | |
3463 | } | |
3464 | journal->j_len--; | |
3465 | journal->j_len_alloc--; | |
a9dd3643 | 3466 | free_cnode(sb, cn); |
bd4c625c | 3467 | return ret; |
1da177e4 LT |
3468 | } |
3469 | ||
3470 | /* | |
098297b2 JM |
3471 | * for any cnode in a journal list, it can only be dirtied of all the |
3472 | * transactions that include it are committed to disk. | |
3473 | * this checks through each transaction, and returns 1 if you are allowed | |
3474 | * to dirty, and 0 if you aren't | |
3475 | * | |
3476 | * it is called by dirty_journal_list, which is called after | |
3477 | * flush_commit_list has gotten all the log blocks for a given | |
3478 | * transaction on disk | |
3479 | * | |
3480 | */ | |
bd4c625c LT |
3481 | static int can_dirty(struct reiserfs_journal_cnode *cn) |
3482 | { | |
3483 | struct super_block *sb = cn->sb; | |
3484 | b_blocknr_t blocknr = cn->blocknr; | |
3485 | struct reiserfs_journal_cnode *cur = cn->hprev; | |
3486 | int can_dirty = 1; | |
3487 | ||
098297b2 JM |
3488 | /* |
3489 | * first test hprev. These are all newer than cn, so any node here | |
3490 | * with the same block number and dev means this node can't be sent | |
3491 | * to disk right now. | |
bd4c625c LT |
3492 | */ |
3493 | while (cur && can_dirty) { | |
3494 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && | |
3495 | cur->blocknr == blocknr) { | |
3496 | can_dirty = 0; | |
3497 | } | |
3498 | cur = cur->hprev; | |
3499 | } | |
098297b2 JM |
3500 | /* |
3501 | * then test hnext. These are all older than cn. As long as they | |
3502 | * are committed to the log, it is safe to write cn to disk | |
bd4c625c LT |
3503 | */ |
3504 | cur = cn->hnext; | |
3505 | while (cur && can_dirty) { | |
3506 | if (cur->jlist && cur->jlist->j_len > 0 && | |
a228bf8f | 3507 | atomic_read(&cur->jlist->j_commit_left) > 0 && cur->bh && |
bd4c625c LT |
3508 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { |
3509 | can_dirty = 0; | |
3510 | } | |
3511 | cur = cur->hnext; | |
3512 | } | |
3513 | return can_dirty; | |
1da177e4 LT |
3514 | } |
3515 | ||
098297b2 JM |
3516 | /* |
3517 | * syncs the commit blocks, but does not force the real buffers to disk | |
3518 | * will wait until the current transaction is done/committed before returning | |
3519 | */ | |
58d85426 | 3520 | int journal_end_sync(struct reiserfs_transaction_handle *th) |
bd4c625c | 3521 | { |
58d85426 | 3522 | struct super_block *sb = th->t_super; |
a9dd3643 | 3523 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 3524 | |
bd4c625c LT |
3525 | BUG_ON(!th->t_trans_id); |
3526 | /* you can sync while nested, very, very bad */ | |
14a61442 | 3527 | BUG_ON(th->t_refcount > 1); |
bd4c625c | 3528 | if (journal->j_len == 0) { |
a9dd3643 | 3529 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3530 | 1); |
09f1b80b | 3531 | journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3532 | } |
58d85426 | 3533 | return do_journal_end(th, COMMIT_NOW | WAIT); |
1da177e4 LT |
3534 | } |
3535 | ||
098297b2 | 3536 | /* writeback the pending async commits to disk */ |
c4028958 | 3537 | static void flush_async_commits(struct work_struct *work) |
bd4c625c | 3538 | { |
c4028958 DH |
3539 | struct reiserfs_journal *journal = |
3540 | container_of(work, struct reiserfs_journal, j_work.work); | |
a9dd3643 | 3541 | struct super_block *sb = journal->j_work_sb; |
bd4c625c LT |
3542 | struct reiserfs_journal_list *jl; |
3543 | struct list_head *entry; | |
3544 | ||
8ebc4232 | 3545 | reiserfs_write_lock(sb); |
bd4c625c LT |
3546 | if (!list_empty(&journal->j_journal_list)) { |
3547 | /* last entry is the youngest, commit it and you get everything */ | |
3548 | entry = journal->j_journal_list.prev; | |
3549 | jl = JOURNAL_LIST_ENTRY(entry); | |
a9dd3643 | 3550 | flush_commit_list(sb, jl, 1); |
bd4c625c | 3551 | } |
8ebc4232 | 3552 | reiserfs_write_unlock(sb); |
1da177e4 LT |
3553 | } |
3554 | ||
3555 | /* | |
098297b2 JM |
3556 | * flushes any old transactions to disk |
3557 | * ends the current transaction if it is too old | |
3558 | */ | |
25729b0e | 3559 | void reiserfs_flush_old_commits(struct super_block *sb) |
bd4c625c | 3560 | { |
34d08260 | 3561 | time64_t now; |
bd4c625c | 3562 | struct reiserfs_transaction_handle th; |
a9dd3643 | 3563 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 3564 | |
34d08260 | 3565 | now = ktime_get_seconds(); |
098297b2 JM |
3566 | /* |
3567 | * safety check so we don't flush while we are replaying the log during | |
bd4c625c LT |
3568 | * mount |
3569 | */ | |
25729b0e AB |
3570 | if (list_empty(&journal->j_journal_list)) |
3571 | return; | |
bd4c625c | 3572 | |
098297b2 JM |
3573 | /* |
3574 | * check the current transaction. If there are no writers, and it is | |
bd4c625c LT |
3575 | * too old, finish it, and force the commit blocks to disk |
3576 | */ | |
3577 | if (atomic_read(&journal->j_wcount) <= 0 && | |
3578 | journal->j_trans_start_time > 0 && | |
3579 | journal->j_len > 0 && | |
3580 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
b491dd17 | 3581 | if (!journal_join(&th, sb)) { |
a9dd3643 JM |
3582 | reiserfs_prepare_for_journal(sb, |
3583 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 3584 | 1); |
09f1b80b | 3585 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3586 | |
098297b2 JM |
3587 | /* |
3588 | * we're only being called from kreiserfsd, it makes | |
3589 | * no sense to do an async commit so that kreiserfsd | |
3590 | * can do it later | |
bd4c625c | 3591 | */ |
58d85426 | 3592 | do_journal_end(&th, COMMIT_NOW | WAIT); |
bd4c625c LT |
3593 | } |
3594 | } | |
1da177e4 LT |
3595 | } |
3596 | ||
3597 | /* | |
098297b2 JM |
3598 | * returns 0 if do_journal_end should return right away, returns 1 if |
3599 | * do_journal_end should finish the commit | |
3600 | * | |
3601 | * if the current transaction is too old, but still has writers, this will | |
3602 | * wait on j_join_wait until all the writers are done. By the time it | |
3603 | * wakes up, the transaction it was called has already ended, so it just | |
3604 | * flushes the commit list and returns 0. | |
3605 | * | |
3606 | * Won't batch when flush or commit_now is set. Also won't batch when | |
3607 | * others are waiting on j_join_wait. | |
3608 | * | |
3609 | * Note, we can't allow the journal_end to proceed while there are still | |
3610 | * writers in the log. | |
3611 | */ | |
58d85426 | 3612 | static int check_journal_end(struct reiserfs_transaction_handle *th, int flags) |
bd4c625c LT |
3613 | { |
3614 | ||
34d08260 | 3615 | time64_t now; |
bd4c625c LT |
3616 | int flush = flags & FLUSH_ALL; |
3617 | int commit_now = flags & COMMIT_NOW; | |
3618 | int wait_on_commit = flags & WAIT; | |
3619 | struct reiserfs_journal_list *jl; | |
58d85426 | 3620 | struct super_block *sb = th->t_super; |
a9dd3643 | 3621 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3622 | |
3623 | BUG_ON(!th->t_trans_id); | |
3624 | ||
3625 | if (th->t_trans_id != journal->j_trans_id) { | |
c3a9c210 JM |
3626 | reiserfs_panic(th->t_super, "journal-1577", |
3627 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3628 | th->t_trans_id, journal->j_trans_id); |
3629 | } | |
3630 | ||
3631 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); | |
098297b2 | 3632 | /* <= 0 is allowed. unmounting might not call begin */ |
a228bf8f JM |
3633 | if (atomic_read(&journal->j_wcount) > 0) |
3634 | atomic_dec(&journal->j_wcount); | |
bd4c625c | 3635 | |
098297b2 JM |
3636 | /* |
3637 | * BUG, deal with case where j_len is 0, but people previously | |
3638 | * freed blocks need to be released will be dealt with by next | |
3639 | * transaction that actually writes something, but should be taken | |
3640 | * care of in this trans | |
bd4c625c | 3641 | */ |
14a61442 ES |
3642 | BUG_ON(journal->j_len == 0); |
3643 | ||
098297b2 JM |
3644 | /* |
3645 | * if wcount > 0, and we are called to with flush or commit_now, | |
3646 | * we wait on j_join_wait. We will wake up when the last writer has | |
3647 | * finished the transaction, and started it on its way to the disk. | |
3648 | * Then, we flush the commit or journal list, and just return 0 | |
3649 | * because the rest of journal end was already done for this | |
3650 | * transaction. | |
bd4c625c | 3651 | */ |
a228bf8f | 3652 | if (atomic_read(&journal->j_wcount) > 0) { |
bd4c625c LT |
3653 | if (flush || commit_now) { |
3654 | unsigned trans_id; | |
3655 | ||
3656 | jl = journal->j_current_jl; | |
3657 | trans_id = jl->j_trans_id; | |
3658 | if (wait_on_commit) | |
3659 | jl->j_state |= LIST_COMMIT_PENDING; | |
a228bf8f | 3660 | atomic_set(&journal->j_jlock, 1); |
bd4c625c LT |
3661 | if (flush) { |
3662 | journal->j_next_full_flush = 1; | |
3663 | } | |
a9dd3643 | 3664 | unlock_journal(sb); |
bd4c625c | 3665 | |
098297b2 JM |
3666 | /* |
3667 | * sleep while the current transaction is | |
3668 | * still j_jlocked | |
3669 | */ | |
bd4c625c LT |
3670 | while (journal->j_trans_id == trans_id) { |
3671 | if (atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3672 | queue_log_writer(sb); |
bd4c625c | 3673 | } else { |
a9dd3643 | 3674 | lock_journal(sb); |
bd4c625c | 3675 | if (journal->j_trans_id == trans_id) { |
a228bf8f | 3676 | atomic_set(&journal->j_jlock, |
bd4c625c LT |
3677 | 1); |
3678 | } | |
a9dd3643 | 3679 | unlock_journal(sb); |
bd4c625c LT |
3680 | } |
3681 | } | |
14a61442 | 3682 | BUG_ON(journal->j_trans_id == trans_id); |
098297b2 | 3683 | |
bd4c625c | 3684 | if (commit_now |
a9dd3643 | 3685 | && journal_list_still_alive(sb, trans_id) |
bd4c625c | 3686 | && wait_on_commit) { |
a9dd3643 | 3687 | flush_commit_list(sb, jl, 1); |
bd4c625c LT |
3688 | } |
3689 | return 0; | |
3690 | } | |
a9dd3643 | 3691 | unlock_journal(sb); |
bd4c625c LT |
3692 | return 0; |
3693 | } | |
3694 | ||
3695 | /* deal with old transactions where we are the last writers */ | |
34d08260 | 3696 | now = ktime_get_seconds(); |
bd4c625c LT |
3697 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { |
3698 | commit_now = 1; | |
3699 | journal->j_next_async_flush = 1; | |
3700 | } | |
3701 | /* don't batch when someone is waiting on j_join_wait */ | |
3702 | /* don't batch when syncing the commit or flushing the whole trans */ | |
a228bf8f | 3703 | if (!(journal->j_must_wait > 0) && !(atomic_read(&journal->j_jlock)) |
bd4c625c LT |
3704 | && !flush && !commit_now && (journal->j_len < journal->j_max_batch) |
3705 | && journal->j_len_alloc < journal->j_max_batch | |
3706 | && journal->j_cnode_free > (journal->j_trans_max * 3)) { | |
3707 | journal->j_bcount++; | |
a9dd3643 | 3708 | unlock_journal(sb); |
bd4c625c LT |
3709 | return 0; |
3710 | } | |
3711 | ||
a9dd3643 JM |
3712 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { |
3713 | reiserfs_panic(sb, "journal-003", | |
c3a9c210 | 3714 | "j_start (%ld) is too high", |
bd4c625c LT |
3715 | journal->j_start); |
3716 | } | |
3717 | return 1; | |
1da177e4 LT |
3718 | } |
3719 | ||
3720 | /* | |
098297b2 JM |
3721 | * Does all the work that makes deleting blocks safe. |
3722 | * when deleting a block mark BH_JNew, just remove it from the current | |
3723 | * transaction, clean it's buffer_head and move on. | |
3724 | * | |
3725 | * otherwise: | |
3726 | * set a bit for the block in the journal bitmap. That will prevent it from | |
3727 | * being allocated for unformatted nodes before this transaction has finished. | |
3728 | * | |
3729 | * mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. | |
3730 | * That will prevent any old transactions with this block from trying to flush | |
3731 | * to the real location. Since we aren't removing the cnode from the | |
3732 | * journal_list_hash, *the block can't be reallocated yet. | |
3733 | * | |
3734 | * Then remove it from the current transaction, decrementing any counters and | |
3735 | * filing it on the clean list. | |
3736 | */ | |
bd4c625c | 3737 | int journal_mark_freed(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3738 | struct super_block *sb, b_blocknr_t blocknr) |
bd4c625c | 3739 | { |
a9dd3643 | 3740 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3741 | struct reiserfs_journal_cnode *cn = NULL; |
3742 | struct buffer_head *bh = NULL; | |
3743 | struct reiserfs_list_bitmap *jb = NULL; | |
3744 | int cleaned = 0; | |
3745 | BUG_ON(!th->t_trans_id); | |
3746 | ||
a9dd3643 | 3747 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3748 | if (cn && cn->bh) { |
3749 | bh = cn->bh; | |
3750 | get_bh(bh); | |
3751 | } | |
3752 | /* if it is journal new, we just remove it from this transaction */ | |
3753 | if (bh && buffer_journal_new(bh)) { | |
3754 | clear_buffer_journal_new(bh); | |
3755 | clear_prepared_bits(bh); | |
3756 | reiserfs_clean_and_file_buffer(bh); | |
a9dd3643 | 3757 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c | 3758 | } else { |
098297b2 JM |
3759 | /* |
3760 | * set the bit for this block in the journal bitmap | |
3761 | * for this transaction | |
3762 | */ | |
bd4c625c LT |
3763 | jb = journal->j_current_jl->j_list_bitmap; |
3764 | if (!jb) { | |
a9dd3643 | 3765 | reiserfs_panic(sb, "journal-1702", |
c3a9c210 | 3766 | "journal_list_bitmap is NULL"); |
bd4c625c | 3767 | } |
a9dd3643 | 3768 | set_bit_in_list_bitmap(sb, blocknr, jb); |
bd4c625c LT |
3769 | |
3770 | /* Note, the entire while loop is not allowed to schedule. */ | |
3771 | ||
3772 | if (bh) { | |
3773 | clear_prepared_bits(bh); | |
3774 | reiserfs_clean_and_file_buffer(bh); | |
3775 | } | |
a9dd3643 | 3776 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c | 3777 | |
098297b2 JM |
3778 | /* |
3779 | * find all older transactions with this block, | |
3780 | * make sure they don't try to write it out | |
3781 | */ | |
a9dd3643 | 3782 | cn = get_journal_hash_dev(sb, journal->j_list_hash_table, |
bd4c625c LT |
3783 | blocknr); |
3784 | while (cn) { | |
a9dd3643 | 3785 | if (sb == cn->sb && blocknr == cn->blocknr) { |
bd4c625c LT |
3786 | set_bit(BLOCK_FREED, &cn->state); |
3787 | if (cn->bh) { | |
098297b2 JM |
3788 | /* |
3789 | * remove_from_transaction will brelse | |
3790 | * the buffer if it was in the current | |
3791 | * trans | |
3792 | */ | |
bd4c625c | 3793 | if (!cleaned) { |
bd4c625c LT |
3794 | clear_buffer_journal_dirty(cn-> |
3795 | bh); | |
3796 | clear_buffer_dirty(cn->bh); | |
3797 | clear_buffer_journal_test(cn-> | |
3798 | bh); | |
3799 | cleaned = 1; | |
3800 | put_bh(cn->bh); | |
3801 | if (atomic_read | |
a228bf8f | 3802 | (&cn->bh->b_count) < 0) { |
a9dd3643 | 3803 | reiserfs_warning(sb, |
45b03d5e JM |
3804 | "journal-2138", |
3805 | "cn->bh->b_count < 0"); | |
bd4c625c LT |
3806 | } |
3807 | } | |
098297b2 JM |
3808 | /* |
3809 | * since we are clearing the bh, | |
3810 | * we MUST dec nonzerolen | |
3811 | */ | |
3812 | if (cn->jlist) { | |
a228bf8f JM |
3813 | atomic_dec(&cn->jlist-> |
3814 | j_nonzerolen); | |
bd4c625c LT |
3815 | } |
3816 | cn->bh = NULL; | |
3817 | } | |
3818 | } | |
3819 | cn = cn->hnext; | |
3820 | } | |
3821 | } | |
3822 | ||
398c95bd CM |
3823 | if (bh) |
3824 | release_buffer_page(bh); /* get_hash grabs the buffer */ | |
bd4c625c LT |
3825 | return 0; |
3826 | } | |
3827 | ||
3828 | void reiserfs_update_inode_transaction(struct inode *inode) | |
3829 | { | |
3830 | struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); | |
3831 | REISERFS_I(inode)->i_jl = journal->j_current_jl; | |
3832 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id; | |
1da177e4 LT |
3833 | } |
3834 | ||
3835 | /* | |
3836 | * returns -1 on error, 0 if no commits/barriers were done and 1 | |
3837 | * if a transaction was actually committed and the barrier was done | |
3838 | */ | |
3839 | static int __commit_trans_jl(struct inode *inode, unsigned long id, | |
bd4c625c | 3840 | struct reiserfs_journal_list *jl) |
1da177e4 | 3841 | { |
bd4c625c LT |
3842 | struct reiserfs_transaction_handle th; |
3843 | struct super_block *sb = inode->i_sb; | |
3844 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
3845 | int ret = 0; | |
3846 | ||
098297b2 JM |
3847 | /* |
3848 | * is it from the current transaction, | |
3849 | * or from an unknown transaction? | |
3850 | */ | |
bd4c625c LT |
3851 | if (id == journal->j_trans_id) { |
3852 | jl = journal->j_current_jl; | |
098297b2 JM |
3853 | /* |
3854 | * try to let other writers come in and | |
3855 | * grow this transaction | |
3856 | */ | |
bd4c625c LT |
3857 | let_transaction_grow(sb, id); |
3858 | if (journal->j_trans_id != id) { | |
3859 | goto flush_commit_only; | |
3860 | } | |
1da177e4 | 3861 | |
bd4c625c LT |
3862 | ret = journal_begin(&th, sb, 1); |
3863 | if (ret) | |
3864 | return ret; | |
3865 | ||
3866 | /* someone might have ended this transaction while we joined */ | |
3867 | if (journal->j_trans_id != id) { | |
3868 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), | |
3869 | 1); | |
09f1b80b | 3870 | journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb)); |
58d85426 | 3871 | ret = journal_end(&th); |
bd4c625c LT |
3872 | goto flush_commit_only; |
3873 | } | |
1da177e4 | 3874 | |
58d85426 | 3875 | ret = journal_end_sync(&th); |
bd4c625c LT |
3876 | if (!ret) |
3877 | ret = 1; | |
1da177e4 | 3878 | |
bd4c625c | 3879 | } else { |
098297b2 JM |
3880 | /* |
3881 | * this gets tricky, we have to make sure the journal list in | |
bd4c625c LT |
3882 | * the inode still exists. We know the list is still around |
3883 | * if we've got a larger transaction id than the oldest list | |
3884 | */ | |
cf776a7a | 3885 | flush_commit_only: |
bd4c625c LT |
3886 | if (journal_list_still_alive(inode->i_sb, id)) { |
3887 | /* | |
3888 | * we only set ret to 1 when we know for sure | |
3889 | * the barrier hasn't been started yet on the commit | |
3890 | * block. | |
3891 | */ | |
3892 | if (atomic_read(&jl->j_commit_left) > 1) | |
3893 | ret = 1; | |
3894 | flush_commit_list(sb, jl, 1); | |
3895 | if (journal->j_errno) | |
3896 | ret = journal->j_errno; | |
3897 | } | |
1da177e4 | 3898 | } |
bd4c625c LT |
3899 | /* otherwise the list is gone, and long since committed */ |
3900 | return ret; | |
3901 | } | |
1da177e4 | 3902 | |
bd4c625c LT |
3903 | int reiserfs_commit_for_inode(struct inode *inode) |
3904 | { | |
600ed416 | 3905 | unsigned int id = REISERFS_I(inode)->i_trans_id; |
bd4c625c | 3906 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; |
1da177e4 | 3907 | |
098297b2 JM |
3908 | /* |
3909 | * for the whole inode, assume unset id means it was | |
bd4c625c | 3910 | * changed in the current transaction. More conservative |
1da177e4 | 3911 | */ |
bd4c625c LT |
3912 | if (!id || !jl) { |
3913 | reiserfs_update_inode_transaction(inode); | |
3914 | id = REISERFS_I(inode)->i_trans_id; | |
3915 | /* jl will be updated in __commit_trans_jl */ | |
3916 | } | |
3917 | ||
3918 | return __commit_trans_jl(inode, id, jl); | |
3919 | } | |
3920 | ||
a9dd3643 | 3921 | void reiserfs_restore_prepared_buffer(struct super_block *sb, |
bd4c625c LT |
3922 | struct buffer_head *bh) |
3923 | { | |
a9dd3643 JM |
3924 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
3925 | PROC_INFO_INC(sb, journal.restore_prepared); | |
bd4c625c LT |
3926 | if (!bh) { |
3927 | return; | |
3928 | } | |
3929 | if (test_clear_buffer_journal_restore_dirty(bh) && | |
3930 | buffer_journal_dirty(bh)) { | |
3931 | struct reiserfs_journal_cnode *cn; | |
278f6679 | 3932 | reiserfs_write_lock(sb); |
a9dd3643 | 3933 | cn = get_journal_hash_dev(sb, |
bd4c625c LT |
3934 | journal->j_list_hash_table, |
3935 | bh->b_blocknr); | |
3936 | if (cn && can_dirty(cn)) { | |
3937 | set_buffer_journal_test(bh); | |
3938 | mark_buffer_dirty(bh); | |
3939 | } | |
278f6679 | 3940 | reiserfs_write_unlock(sb); |
bd4c625c LT |
3941 | } |
3942 | clear_buffer_journal_prepared(bh); | |
3943 | } | |
3944 | ||
3945 | extern struct tree_balance *cur_tb; | |
1da177e4 | 3946 | /* |
098297b2 JM |
3947 | * before we can change a metadata block, we have to make sure it won't |
3948 | * be written to disk while we are altering it. So, we must: | |
3949 | * clean it | |
3950 | * wait on it. | |
3951 | */ | |
a9dd3643 | 3952 | int reiserfs_prepare_for_journal(struct super_block *sb, |
bd4c625c LT |
3953 | struct buffer_head *bh, int wait) |
3954 | { | |
a9dd3643 | 3955 | PROC_INFO_INC(sb, journal.prepare); |
bd4c625c | 3956 | |
ca5de404 | 3957 | if (!trylock_buffer(bh)) { |
bd4c625c LT |
3958 | if (!wait) |
3959 | return 0; | |
3960 | lock_buffer(bh); | |
3961 | } | |
3962 | set_buffer_journal_prepared(bh); | |
3963 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { | |
3964 | clear_buffer_journal_test(bh); | |
3965 | set_buffer_journal_restore_dirty(bh); | |
3966 | } | |
3967 | unlock_buffer(bh); | |
3968 | return 1; | |
3969 | } | |
3970 | ||
0222e657 | 3971 | /* |
098297b2 JM |
3972 | * long and ugly. If flush, will not return until all commit |
3973 | * blocks and all real buffers in the trans are on disk. | |
3974 | * If no_async, won't return until all commit blocks are on disk. | |
3975 | * | |
3976 | * keep reading, there are comments as you go along | |
3977 | * | |
3978 | * If the journal is aborted, we just clean up. Things like flushing | |
3979 | * journal lists, etc just won't happen. | |
3980 | */ | |
58d85426 | 3981 | static int do_journal_end(struct reiserfs_transaction_handle *th, int flags) |
bd4c625c | 3982 | { |
58d85426 | 3983 | struct super_block *sb = th->t_super; |
a9dd3643 | 3984 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3985 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; |
3986 | struct reiserfs_journal_cnode *last_cn = NULL; | |
3987 | struct reiserfs_journal_desc *desc; | |
3988 | struct reiserfs_journal_commit *commit; | |
3989 | struct buffer_head *c_bh; /* commit bh */ | |
3990 | struct buffer_head *d_bh; /* desc bh */ | |
3991 | int cur_write_start = 0; /* start index of current log write */ | |
bd4c625c | 3992 | int i; |
a44c94a7 AZ |
3993 | int flush; |
3994 | int wait_on_commit; | |
bd4c625c LT |
3995 | struct reiserfs_journal_list *jl, *temp_jl; |
3996 | struct list_head *entry, *safe; | |
3997 | unsigned long jindex; | |
600ed416 | 3998 | unsigned int commit_trans_id; |
bd4c625c | 3999 | int trans_half; |
278f6679 | 4000 | int depth; |
bd4c625c LT |
4001 | |
4002 | BUG_ON(th->t_refcount > 1); | |
4003 | BUG_ON(!th->t_trans_id); | |
58d85426 | 4004 | BUG_ON(!th->t_super); |
bd4c625c | 4005 | |
098297b2 JM |
4006 | /* |
4007 | * protect flush_older_commits from doing mistakes if the | |
4008 | * transaction ID counter gets overflowed. | |
4009 | */ | |
600ed416 | 4010 | if (th->t_trans_id == ~0U) |
a44c94a7 AZ |
4011 | flags |= FLUSH_ALL | COMMIT_NOW | WAIT; |
4012 | flush = flags & FLUSH_ALL; | |
4013 | wait_on_commit = flags & WAIT; | |
4014 | ||
bd4c625c | 4015 | current->journal_info = th->t_handle_save; |
a9dd3643 | 4016 | reiserfs_check_lock_depth(sb, "journal end"); |
bd4c625c | 4017 | if (journal->j_len == 0) { |
a9dd3643 | 4018 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 4019 | 1); |
09f1b80b | 4020 | journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 4021 | } |
1da177e4 | 4022 | |
a9dd3643 | 4023 | lock_journal(sb); |
bd4c625c LT |
4024 | if (journal->j_next_full_flush) { |
4025 | flags |= FLUSH_ALL; | |
4026 | flush = 1; | |
4027 | } | |
4028 | if (journal->j_next_async_flush) { | |
4029 | flags |= COMMIT_NOW | WAIT; | |
4030 | wait_on_commit = 1; | |
4031 | } | |
4032 | ||
098297b2 JM |
4033 | /* |
4034 | * check_journal_end locks the journal, and unlocks if it does | |
4035 | * not return 1 it tells us if we should continue with the | |
4036 | * journal_end, or just return | |
bd4c625c | 4037 | */ |
58d85426 | 4038 | if (!check_journal_end(th, flags)) { |
033369d1 | 4039 | reiserfs_schedule_old_flush(sb); |
a9dd3643 JM |
4040 | wake_queued_writers(sb); |
4041 | reiserfs_async_progress_wait(sb); | |
bd4c625c LT |
4042 | goto out; |
4043 | } | |
4044 | ||
4045 | /* check_journal_end might set these, check again */ | |
4046 | if (journal->j_next_full_flush) { | |
4047 | flush = 1; | |
4048 | } | |
4049 | ||
4050 | /* | |
098297b2 JM |
4051 | * j must wait means we have to flush the log blocks, and the |
4052 | * real blocks for this transaction | |
bd4c625c LT |
4053 | */ |
4054 | if (journal->j_must_wait > 0) { | |
4055 | flush = 1; | |
4056 | } | |
1da177e4 | 4057 | #ifdef REISERFS_PREALLOCATE |
098297b2 JM |
4058 | /* |
4059 | * quota ops might need to nest, setup the journal_info pointer | |
4060 | * for them and raise the refcount so that it is > 0. | |
4061 | */ | |
bd4c625c | 4062 | current->journal_info = th; |
ef43bc4f | 4063 | th->t_refcount++; |
098297b2 JM |
4064 | |
4065 | /* it should not involve new blocks into the transaction */ | |
4066 | reiserfs_discard_all_prealloc(th); | |
4067 | ||
ef43bc4f | 4068 | th->t_refcount--; |
bd4c625c | 4069 | current->journal_info = th->t_handle_save; |
1da177e4 | 4070 | #endif |
bd4c625c LT |
4071 | |
4072 | /* setup description block */ | |
4073 | d_bh = | |
a9dd3643 JM |
4074 | journal_getblk(sb, |
4075 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4076 | journal->j_start); |
4077 | set_buffer_uptodate(d_bh); | |
4078 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; | |
4079 | memset(d_bh->b_data, 0, d_bh->b_size); | |
4080 | memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); | |
4081 | set_desc_trans_id(desc, journal->j_trans_id); | |
4082 | ||
098297b2 JM |
4083 | /* |
4084 | * setup commit block. Don't write (keep it clean too) this one | |
4085 | * until after everyone else is written | |
4086 | */ | |
a9dd3643 | 4087 | c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 4088 | ((journal->j_start + journal->j_len + |
a9dd3643 | 4089 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4090 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
4091 | memset(c_bh->b_data, 0, c_bh->b_size); | |
4092 | set_commit_trans_id(commit, journal->j_trans_id); | |
4093 | set_buffer_uptodate(c_bh); | |
4094 | ||
4095 | /* init this journal list */ | |
4096 | jl = journal->j_current_jl; | |
4097 | ||
098297b2 JM |
4098 | /* |
4099 | * we lock the commit before doing anything because | |
bd4c625c LT |
4100 | * we want to make sure nobody tries to run flush_commit_list until |
4101 | * the new transaction is fully setup, and we've already flushed the | |
4102 | * ordered bh list | |
4103 | */ | |
8ebc4232 | 4104 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); |
bd4c625c LT |
4105 | |
4106 | /* save the transaction id in case we need to commit it later */ | |
4107 | commit_trans_id = jl->j_trans_id; | |
4108 | ||
4109 | atomic_set(&jl->j_older_commits_done, 0); | |
4110 | jl->j_trans_id = journal->j_trans_id; | |
4111 | jl->j_timestamp = journal->j_trans_start_time; | |
4112 | jl->j_commit_bh = c_bh; | |
4113 | jl->j_start = journal->j_start; | |
4114 | jl->j_len = journal->j_len; | |
4115 | atomic_set(&jl->j_nonzerolen, journal->j_len); | |
4116 | atomic_set(&jl->j_commit_left, journal->j_len + 2); | |
4117 | jl->j_realblock = NULL; | |
4118 | ||
098297b2 JM |
4119 | /* |
4120 | * The ENTIRE FOR LOOP MUST not cause schedule to occur. | |
4121 | * for each real block, add it to the journal list hash, | |
4122 | * copy into real block index array in the commit or desc block | |
bd4c625c | 4123 | */ |
a9dd3643 | 4124 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
4125 | for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { |
4126 | if (buffer_journaled(cn->bh)) { | |
a9dd3643 | 4127 | jl_cn = get_cnode(sb); |
bd4c625c | 4128 | if (!jl_cn) { |
a9dd3643 | 4129 | reiserfs_panic(sb, "journal-1676", |
c3a9c210 | 4130 | "get_cnode returned NULL"); |
bd4c625c LT |
4131 | } |
4132 | if (i == 0) { | |
4133 | jl->j_realblock = jl_cn; | |
4134 | } | |
4135 | jl_cn->prev = last_cn; | |
4136 | jl_cn->next = NULL; | |
4137 | if (last_cn) { | |
4138 | last_cn->next = jl_cn; | |
4139 | } | |
4140 | last_cn = jl_cn; | |
098297b2 JM |
4141 | /* |
4142 | * make sure the block we are trying to log | |
4143 | * is not a block of journal or reserved area | |
4144 | */ | |
bd4c625c | 4145 | if (is_block_in_log_or_reserved_area |
a9dd3643 JM |
4146 | (sb, cn->bh->b_blocknr)) { |
4147 | reiserfs_panic(sb, "journal-2332", | |
c3a9c210 JM |
4148 | "Trying to log block %lu, " |
4149 | "which is a log block", | |
bd4c625c LT |
4150 | cn->bh->b_blocknr); |
4151 | } | |
4152 | jl_cn->blocknr = cn->bh->b_blocknr; | |
4153 | jl_cn->state = 0; | |
a9dd3643 | 4154 | jl_cn->sb = sb; |
bd4c625c LT |
4155 | jl_cn->bh = cn->bh; |
4156 | jl_cn->jlist = jl; | |
4157 | insert_journal_hash(journal->j_list_hash_table, jl_cn); | |
4158 | if (i < trans_half) { | |
4159 | desc->j_realblock[i] = | |
4160 | cpu_to_le32(cn->bh->b_blocknr); | |
4161 | } else { | |
4162 | commit->j_realblock[i - trans_half] = | |
4163 | cpu_to_le32(cn->bh->b_blocknr); | |
4164 | } | |
4165 | } else { | |
4166 | i--; | |
4167 | } | |
4168 | } | |
4169 | set_desc_trans_len(desc, journal->j_len); | |
4170 | set_desc_mount_id(desc, journal->j_mount_id); | |
4171 | set_desc_trans_id(desc, journal->j_trans_id); | |
4172 | set_commit_trans_len(commit, journal->j_len); | |
4173 | ||
098297b2 JM |
4174 | /* |
4175 | * special check in case all buffers in the journal | |
4176 | * were marked for not logging | |
4177 | */ | |
14a61442 | 4178 | BUG_ON(journal->j_len == 0); |
bd4c625c | 4179 | |
098297b2 JM |
4180 | /* |
4181 | * we're about to dirty all the log blocks, mark the description block | |
bd4c625c LT |
4182 | * dirty now too. Don't mark the commit block dirty until all the |
4183 | * others are on disk | |
4184 | */ | |
4185 | mark_buffer_dirty(d_bh); | |
4186 | ||
098297b2 JM |
4187 | /* |
4188 | * first data block is j_start + 1, so add one to | |
4189 | * cur_write_start wherever you use it | |
4190 | */ | |
bd4c625c LT |
4191 | cur_write_start = journal->j_start; |
4192 | cn = journal->j_first; | |
098297b2 | 4193 | jindex = 1; /* start at one so we don't get the desc again */ |
bd4c625c LT |
4194 | while (cn) { |
4195 | clear_buffer_journal_new(cn->bh); | |
4196 | /* copy all the real blocks into log area. dirty log blocks */ | |
4197 | if (buffer_journaled(cn->bh)) { | |
4198 | struct buffer_head *tmp_bh; | |
4199 | char *addr; | |
4200 | struct page *page; | |
4201 | tmp_bh = | |
a9dd3643 JM |
4202 | journal_getblk(sb, |
4203 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4204 | ((cur_write_start + |
4205 | jindex) % | |
a9dd3643 | 4206 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4207 | set_buffer_uptodate(tmp_bh); |
4208 | page = cn->bh->b_page; | |
4209 | addr = kmap(page); | |
4210 | memcpy(tmp_bh->b_data, | |
4211 | addr + offset_in_page(cn->bh->b_data), | |
4212 | cn->bh->b_size); | |
4213 | kunmap(page); | |
4214 | mark_buffer_dirty(tmp_bh); | |
4215 | jindex++; | |
4216 | set_buffer_journal_dirty(cn->bh); | |
4217 | clear_buffer_journaled(cn->bh); | |
4218 | } else { | |
098297b2 JM |
4219 | /* |
4220 | * JDirty cleared sometime during transaction. | |
4221 | * don't log this one | |
4222 | */ | |
a9dd3643 | 4223 | reiserfs_warning(sb, "journal-2048", |
45b03d5e JM |
4224 | "BAD, buffer in journal hash, " |
4225 | "but not JDirty!"); | |
bd4c625c LT |
4226 | brelse(cn->bh); |
4227 | } | |
4228 | next = cn->next; | |
a9dd3643 | 4229 | free_cnode(sb, cn); |
bd4c625c | 4230 | cn = next; |
278f6679 | 4231 | reiserfs_cond_resched(sb); |
bd4c625c LT |
4232 | } |
4233 | ||
098297b2 JM |
4234 | /* |
4235 | * we are done with both the c_bh and d_bh, but | |
4236 | * c_bh must be written after all other commit blocks, | |
4237 | * so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. | |
bd4c625c LT |
4238 | */ |
4239 | ||
a9dd3643 | 4240 | journal->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
4241 | |
4242 | /* now it is safe to insert this transaction on the main list */ | |
4243 | list_add_tail(&jl->j_list, &journal->j_journal_list); | |
4244 | list_add_tail(&jl->j_working_list, &journal->j_working_list); | |
4245 | journal->j_num_work_lists++; | |
4246 | ||
4247 | /* reset journal values for the next transaction */ | |
bd4c625c LT |
4248 | journal->j_start = |
4249 | (journal->j_start + journal->j_len + | |
a9dd3643 | 4250 | 2) % SB_ONDISK_JOURNAL_SIZE(sb); |
a228bf8f | 4251 | atomic_set(&journal->j_wcount, 0); |
bd4c625c LT |
4252 | journal->j_bcount = 0; |
4253 | journal->j_last = NULL; | |
4254 | journal->j_first = NULL; | |
4255 | journal->j_len = 0; | |
4256 | journal->j_trans_start_time = 0; | |
a44c94a7 AZ |
4257 | /* check for trans_id overflow */ |
4258 | if (++journal->j_trans_id == 0) | |
4259 | journal->j_trans_id = 10; | |
bd4c625c LT |
4260 | journal->j_current_jl->j_trans_id = journal->j_trans_id; |
4261 | journal->j_must_wait = 0; | |
4262 | journal->j_len_alloc = 0; | |
4263 | journal->j_next_full_flush = 0; | |
4264 | journal->j_next_async_flush = 0; | |
a9dd3643 | 4265 | init_journal_hash(sb); |
bd4c625c | 4266 | |
098297b2 JM |
4267 | /* |
4268 | * make sure reiserfs_add_jh sees the new current_jl before we | |
4269 | * write out the tails | |
4270 | */ | |
bd4c625c LT |
4271 | smp_mb(); |
4272 | ||
098297b2 JM |
4273 | /* |
4274 | * tail conversion targets have to hit the disk before we end the | |
bd4c625c | 4275 | * transaction. Otherwise a later transaction might repack the tail |
098297b2 JM |
4276 | * before this transaction commits, leaving the data block unflushed |
4277 | * and clean, if we crash before the later transaction commits, the | |
4278 | * data block is lost. | |
bd4c625c LT |
4279 | */ |
4280 | if (!list_empty(&jl->j_tail_bh_list)) { | |
278f6679 | 4281 | depth = reiserfs_write_unlock_nested(sb); |
bd4c625c LT |
4282 | write_ordered_buffers(&journal->j_dirty_buffers_lock, |
4283 | journal, jl, &jl->j_tail_bh_list); | |
278f6679 | 4284 | reiserfs_write_lock_nested(sb, depth); |
bd4c625c | 4285 | } |
14a61442 | 4286 | BUG_ON(!list_empty(&jl->j_tail_bh_list)); |
90415dea | 4287 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c | 4288 | |
098297b2 JM |
4289 | /* |
4290 | * honor the flush wishes from the caller, simple commits can | |
4291 | * be done outside the journal lock, they are done below | |
4292 | * | |
4293 | * if we don't flush the commit list right now, we put it into | |
4294 | * the work queue so the people waiting on the async progress work | |
4295 | * queue don't wait for this proc to flush journal lists and such. | |
bd4c625c LT |
4296 | */ |
4297 | if (flush) { | |
a9dd3643 JM |
4298 | flush_commit_list(sb, jl, 1); |
4299 | flush_journal_list(sb, jl, 1); | |
01777836 JK |
4300 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) { |
4301 | /* | |
4302 | * Avoid queueing work when sb is being shut down. Transaction | |
4303 | * will be flushed on journal shutdown. | |
4304 | */ | |
1751e8a6 | 4305 | if (sb->s_flags & SB_ACTIVE) |
01777836 JK |
4306 | queue_delayed_work(REISERFS_SB(sb)->commit_wq, |
4307 | &journal->j_work, HZ / 10); | |
4308 | } | |
bd4c625c | 4309 | |
098297b2 JM |
4310 | /* |
4311 | * if the next transaction has any chance of wrapping, flush | |
4312 | * transactions that might get overwritten. If any journal lists | |
4313 | * are very old flush them as well. | |
bd4c625c | 4314 | */ |
cf776a7a | 4315 | first_jl: |
bd4c625c LT |
4316 | list_for_each_safe(entry, safe, &journal->j_journal_list) { |
4317 | temp_jl = JOURNAL_LIST_ENTRY(entry); | |
4318 | if (journal->j_start <= temp_jl->j_start) { | |
4319 | if ((journal->j_start + journal->j_trans_max + 1) >= | |
4320 | temp_jl->j_start) { | |
a9dd3643 | 4321 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4322 | goto first_jl; |
4323 | } else if ((journal->j_start + | |
4324 | journal->j_trans_max + 1) < | |
a9dd3643 | 4325 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
098297b2 JM |
4326 | /* |
4327 | * if we don't cross into the next | |
4328 | * transaction and we don't wrap, there is | |
4329 | * no way we can overlap any later transactions | |
bd4c625c LT |
4330 | * break now |
4331 | */ | |
4332 | break; | |
4333 | } | |
4334 | } else if ((journal->j_start + | |
4335 | journal->j_trans_max + 1) > | |
a9dd3643 | 4336 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c | 4337 | if (((journal->j_start + journal->j_trans_max + 1) % |
a9dd3643 | 4338 | SB_ONDISK_JOURNAL_SIZE(sb)) >= |
bd4c625c | 4339 | temp_jl->j_start) { |
a9dd3643 | 4340 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4341 | goto first_jl; |
4342 | } else { | |
098297b2 JM |
4343 | /* |
4344 | * we don't overlap anything from out start | |
4345 | * to the end of the log, and our wrapped | |
4346 | * portion doesn't overlap anything at | |
4347 | * the start of the log. We can break | |
4348 | */ | |
bd4c625c LT |
4349 | break; |
4350 | } | |
4351 | } | |
4352 | } | |
bd4c625c LT |
4353 | |
4354 | journal->j_current_jl->j_list_bitmap = | |
a9dd3643 | 4355 | get_list_bitmap(sb, journal->j_current_jl); |
bd4c625c LT |
4356 | |
4357 | if (!(journal->j_current_jl->j_list_bitmap)) { | |
a9dd3643 | 4358 | reiserfs_panic(sb, "journal-1996", |
c3a9c210 | 4359 | "could not get a list bitmap"); |
bd4c625c LT |
4360 | } |
4361 | ||
a228bf8f | 4362 | atomic_set(&journal->j_jlock, 0); |
a9dd3643 | 4363 | unlock_journal(sb); |
bd4c625c LT |
4364 | /* wake up any body waiting to join. */ |
4365 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); | |
a228bf8f | 4366 | wake_up(&journal->j_join_wait); |
bd4c625c LT |
4367 | |
4368 | if (!flush && wait_on_commit && | |
a9dd3643 JM |
4369 | journal_list_still_alive(sb, commit_trans_id)) { |
4370 | flush_commit_list(sb, jl, 1); | |
bd4c625c | 4371 | } |
cf776a7a | 4372 | out: |
a9dd3643 | 4373 | reiserfs_check_lock_depth(sb, "journal end2"); |
bd4c625c LT |
4374 | |
4375 | memset(th, 0, sizeof(*th)); | |
098297b2 JM |
4376 | /* |
4377 | * Re-set th->t_super, so we can properly keep track of how many | |
bd4c625c | 4378 | * persistent transactions there are. We need to do this so if this |
098297b2 JM |
4379 | * call is part of a failed restart_transaction, we can free it later |
4380 | */ | |
a9dd3643 | 4381 | th->t_super = sb; |
bd4c625c LT |
4382 | |
4383 | return journal->j_errno; | |
4384 | } | |
4385 | ||
32e8b106 JM |
4386 | /* Send the file system read only and refuse new transactions */ |
4387 | void reiserfs_abort_journal(struct super_block *sb, int errno) | |
bd4c625c LT |
4388 | { |
4389 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
4390 | if (test_bit(J_ABORTED, &journal->j_state)) | |
4391 | return; | |
4392 | ||
32e8b106 JM |
4393 | if (!journal->j_errno) |
4394 | journal->j_errno = errno; | |
bd4c625c | 4395 | |
1751e8a6 | 4396 | sb->s_flags |= SB_RDONLY; |
bd4c625c | 4397 | set_bit(J_ABORTED, &journal->j_state); |
1da177e4 LT |
4398 | |
4399 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 4400 | dump_stack(); |
1da177e4 LT |
4401 | #endif |
4402 | } |