Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | ** Write ahead logging implementation copyright Chris Mason 2000 | |
3 | ** | |
25985edc | 4 | ** The background commits make this code very interrelated, and |
1da177e4 LT |
5 | ** overly complex. I need to rethink things a bit....The major players: |
6 | ** | |
0222e657 | 7 | ** journal_begin -- call with the number of blocks you expect to log. |
1da177e4 | 8 | ** If the current transaction is too |
0222e657 | 9 | ** old, it will block until the current transaction is |
1da177e4 | 10 | ** finished, and then start a new one. |
0222e657 | 11 | ** Usually, your transaction will get joined in with |
1da177e4 LT |
12 | ** previous ones for speed. |
13 | ** | |
0222e657 | 14 | ** journal_join -- same as journal_begin, but won't block on the current |
1da177e4 | 15 | ** transaction regardless of age. Don't ever call |
0222e657 | 16 | ** this. Ever. There are only two places it should be |
1da177e4 LT |
17 | ** called from, and they are both inside this file. |
18 | ** | |
0222e657 | 19 | ** journal_mark_dirty -- adds blocks into this transaction. clears any flags |
1da177e4 | 20 | ** that might make them get sent to disk |
0222e657 JM |
21 | ** and then marks them BH_JDirty. Puts the buffer head |
22 | ** into the current transaction hash. | |
1da177e4 LT |
23 | ** |
24 | ** journal_end -- if the current transaction is batchable, it does nothing | |
25 | ** otherwise, it could do an async/synchronous commit, or | |
0222e657 | 26 | ** a full flush of all log and real blocks in the |
1da177e4 LT |
27 | ** transaction. |
28 | ** | |
0222e657 JM |
29 | ** flush_old_commits -- if the current transaction is too old, it is ended and |
30 | ** commit blocks are sent to disk. Forces commit blocks | |
31 | ** to disk for all backgrounded commits that have been | |
1da177e4 | 32 | ** around too long. |
0222e657 | 33 | ** -- Note, if you call this as an immediate flush from |
1da177e4 LT |
34 | ** from within kupdate, it will ignore the immediate flag |
35 | */ | |
36 | ||
1da177e4 | 37 | #include <linux/time.h> |
6188e10d | 38 | #include <linux/semaphore.h> |
1da177e4 | 39 | #include <linux/vmalloc.h> |
f466c6fd | 40 | #include "reiserfs.h" |
1da177e4 LT |
41 | #include <linux/kernel.h> |
42 | #include <linux/errno.h> | |
43 | #include <linux/fcntl.h> | |
44 | #include <linux/stat.h> | |
45 | #include <linux/string.h> | |
1da177e4 LT |
46 | #include <linux/buffer_head.h> |
47 | #include <linux/workqueue.h> | |
48 | #include <linux/writeback.h> | |
49 | #include <linux/blkdev.h> | |
3fcfab16 | 50 | #include <linux/backing-dev.h> |
90415dea | 51 | #include <linux/uaccess.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
90415dea | 53 | |
1da177e4 | 54 | |
1da177e4 LT |
55 | /* gets a struct reiserfs_journal_list * from a list head */ |
56 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
57 | j_list)) | |
58 | #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
59 | j_working_list)) | |
60 | ||
bd4c625c LT |
61 | #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit |
62 | structs at 4k */ | |
63 | #define BUFNR 64 /*read ahead */ | |
1da177e4 LT |
64 | |
65 | /* cnode stat bits. Move these into reiserfs_fs.h */ | |
66 | ||
67 | #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ | |
bd4c625c | 68 | #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ |
1da177e4 LT |
69 | |
70 | #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ | |
71 | #define BLOCK_DIRTIED 5 | |
72 | ||
1da177e4 LT |
73 | /* journal list state bits */ |
74 | #define LIST_TOUCHED 1 | |
75 | #define LIST_DIRTY 2 | |
bd4c625c | 76 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ |
1da177e4 LT |
77 | |
78 | /* flags for do_journal_end */ | |
79 | #define FLUSH_ALL 1 /* flush commit and real blocks */ | |
80 | #define COMMIT_NOW 2 /* end and commit this transaction */ | |
bd4c625c LT |
81 | #define WAIT 4 /* wait for the log blocks to hit the disk */ |
82 | ||
83 | static int do_journal_end(struct reiserfs_transaction_handle *, | |
84 | struct super_block *, unsigned long nblocks, | |
85 | int flags); | |
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, | |
a9dd3643 | 92 | struct super_block *sb, unsigned long nblocks); |
4385bab1 | 93 | static void release_journal_dev(struct super_block *super, |
bd4c625c | 94 | struct reiserfs_journal *journal); |
1da177e4 | 95 | static int 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 LT |
102 | JBEGIN_REG = 0, /* regular journal begin */ |
103 | JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ | |
104 | JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ | |
1da177e4 LT |
105 | }; |
106 | ||
107 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 108 | struct super_block *sb, |
bd4c625c | 109 | unsigned long nblocks, int join); |
1da177e4 | 110 | |
a9dd3643 | 111 | static void init_journal_hash(struct super_block *sb) |
bd4c625c | 112 | { |
a9dd3643 | 113 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
114 | memset(journal->j_hash_table, 0, |
115 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
1da177e4 LT |
116 | } |
117 | ||
118 | /* | |
119 | ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to | |
120 | ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for | |
121 | ** more details. | |
122 | */ | |
bd4c625c LT |
123 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) |
124 | { | |
125 | if (bh) { | |
126 | clear_buffer_dirty(bh); | |
127 | clear_buffer_journal_test(bh); | |
128 | } | |
129 | return 0; | |
1da177e4 LT |
130 | } |
131 | ||
bd4c625c | 132 | static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block |
a9dd3643 | 133 | *sb) |
bd4c625c LT |
134 | { |
135 | struct reiserfs_bitmap_node *bn; | |
136 | static int id; | |
137 | ||
d739b42b | 138 | bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); |
bd4c625c LT |
139 | if (!bn) { |
140 | return NULL; | |
141 | } | |
a9dd3643 | 142 | bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); |
bd4c625c | 143 | if (!bn->data) { |
d739b42b | 144 | kfree(bn); |
bd4c625c LT |
145 | return NULL; |
146 | } | |
147 | bn->id = id++; | |
bd4c625c LT |
148 | INIT_LIST_HEAD(&bn->list); |
149 | return bn; | |
150 | } | |
151 | ||
a9dd3643 | 152 | static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) |
bd4c625c | 153 | { |
a9dd3643 | 154 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
155 | struct reiserfs_bitmap_node *bn = NULL; |
156 | struct list_head *entry = journal->j_bitmap_nodes.next; | |
157 | ||
158 | journal->j_used_bitmap_nodes++; | |
159 | repeat: | |
160 | ||
161 | if (entry != &journal->j_bitmap_nodes) { | |
162 | bn = list_entry(entry, struct reiserfs_bitmap_node, list); | |
163 | list_del(entry); | |
a9dd3643 | 164 | memset(bn->data, 0, sb->s_blocksize); |
bd4c625c LT |
165 | journal->j_free_bitmap_nodes--; |
166 | return bn; | |
167 | } | |
a9dd3643 | 168 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
169 | if (!bn) { |
170 | yield(); | |
171 | goto repeat; | |
172 | } | |
173 | return bn; | |
1da177e4 | 174 | } |
a9dd3643 | 175 | static inline void free_bitmap_node(struct super_block *sb, |
bd4c625c LT |
176 | struct reiserfs_bitmap_node *bn) |
177 | { | |
a9dd3643 | 178 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
179 | journal->j_used_bitmap_nodes--; |
180 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { | |
d739b42b PE |
181 | kfree(bn->data); |
182 | kfree(bn); | |
bd4c625c LT |
183 | } else { |
184 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
185 | journal->j_free_bitmap_nodes++; | |
186 | } | |
187 | } | |
188 | ||
a9dd3643 | 189 | static void allocate_bitmap_nodes(struct super_block *sb) |
bd4c625c LT |
190 | { |
191 | int i; | |
a9dd3643 | 192 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
193 | struct reiserfs_bitmap_node *bn = NULL; |
194 | for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { | |
a9dd3643 | 195 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
196 | if (bn) { |
197 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
198 | journal->j_free_bitmap_nodes++; | |
199 | } else { | |
0222e657 | 200 | break; /* this is ok, we'll try again when more are needed */ |
bd4c625c LT |
201 | } |
202 | } | |
1da177e4 LT |
203 | } |
204 | ||
a9dd3643 | 205 | static int set_bit_in_list_bitmap(struct super_block *sb, |
3ee16670 | 206 | b_blocknr_t block, |
bd4c625c LT |
207 | struct reiserfs_list_bitmap *jb) |
208 | { | |
a9dd3643 JM |
209 | unsigned int bmap_nr = block / (sb->s_blocksize << 3); |
210 | unsigned int bit_nr = block % (sb->s_blocksize << 3); | |
1da177e4 | 211 | |
bd4c625c | 212 | if (!jb->bitmaps[bmap_nr]) { |
a9dd3643 | 213 | jb->bitmaps[bmap_nr] = get_bitmap_node(sb); |
bd4c625c LT |
214 | } |
215 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); | |
216 | return 0; | |
1da177e4 LT |
217 | } |
218 | ||
a9dd3643 | 219 | static void cleanup_bitmap_list(struct super_block *sb, |
bd4c625c LT |
220 | struct reiserfs_list_bitmap *jb) |
221 | { | |
222 | int i; | |
223 | if (jb->bitmaps == NULL) | |
224 | return; | |
225 | ||
a9dd3643 | 226 | for (i = 0; i < reiserfs_bmap_count(sb); i++) { |
bd4c625c | 227 | if (jb->bitmaps[i]) { |
a9dd3643 | 228 | free_bitmap_node(sb, jb->bitmaps[i]); |
bd4c625c LT |
229 | jb->bitmaps[i] = NULL; |
230 | } | |
231 | } | |
1da177e4 LT |
232 | } |
233 | ||
234 | /* | |
235 | ** only call this on FS unmount. | |
236 | */ | |
a9dd3643 | 237 | static int free_list_bitmaps(struct super_block *sb, |
bd4c625c LT |
238 | struct reiserfs_list_bitmap *jb_array) |
239 | { | |
240 | int i; | |
241 | struct reiserfs_list_bitmap *jb; | |
242 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
243 | jb = jb_array + i; | |
244 | jb->journal_list = NULL; | |
a9dd3643 | 245 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
246 | vfree(jb->bitmaps); |
247 | jb->bitmaps = NULL; | |
248 | } | |
249 | return 0; | |
250 | } | |
251 | ||
a9dd3643 | 252 | static int free_bitmap_nodes(struct super_block *sb) |
bd4c625c | 253 | { |
a9dd3643 | 254 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
255 | struct list_head *next = journal->j_bitmap_nodes.next; |
256 | struct reiserfs_bitmap_node *bn; | |
257 | ||
258 | while (next != &journal->j_bitmap_nodes) { | |
259 | bn = list_entry(next, struct reiserfs_bitmap_node, list); | |
260 | list_del(next); | |
d739b42b PE |
261 | kfree(bn->data); |
262 | kfree(bn); | |
bd4c625c LT |
263 | next = journal->j_bitmap_nodes.next; |
264 | journal->j_free_bitmap_nodes--; | |
265 | } | |
266 | ||
267 | return 0; | |
1da177e4 LT |
268 | } |
269 | ||
270 | /* | |
0222e657 | 271 | ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. |
1da177e4 LT |
272 | ** jb_array is the array to be filled in. |
273 | */ | |
a9dd3643 | 274 | int reiserfs_allocate_list_bitmaps(struct super_block *sb, |
bd4c625c | 275 | struct reiserfs_list_bitmap *jb_array, |
3ee16670 | 276 | unsigned int bmap_nr) |
bd4c625c LT |
277 | { |
278 | int i; | |
279 | int failed = 0; | |
280 | struct reiserfs_list_bitmap *jb; | |
281 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); | |
282 | ||
283 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
284 | jb = jb_array + i; | |
285 | jb->journal_list = NULL; | |
558feb08 | 286 | jb->bitmaps = vzalloc(mem); |
bd4c625c | 287 | if (!jb->bitmaps) { |
a9dd3643 | 288 | reiserfs_warning(sb, "clm-2000", "unable to " |
45b03d5e | 289 | "allocate bitmaps for journal lists"); |
bd4c625c LT |
290 | failed = 1; |
291 | break; | |
292 | } | |
bd4c625c LT |
293 | } |
294 | if (failed) { | |
a9dd3643 | 295 | free_list_bitmaps(sb, jb_array); |
bd4c625c LT |
296 | return -1; |
297 | } | |
298 | return 0; | |
1da177e4 LT |
299 | } |
300 | ||
301 | /* | |
0222e657 | 302 | ** find an available list bitmap. If you can't find one, flush a commit list |
1da177e4 LT |
303 | ** and try again |
304 | */ | |
a9dd3643 | 305 | static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, |
bd4c625c LT |
306 | struct reiserfs_journal_list |
307 | *jl) | |
308 | { | |
309 | int i, j; | |
a9dd3643 | 310 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
311 | struct reiserfs_list_bitmap *jb = NULL; |
312 | ||
313 | for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { | |
314 | i = journal->j_list_bitmap_index; | |
315 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; | |
316 | jb = journal->j_list_bitmap + i; | |
317 | if (journal->j_list_bitmap[i].journal_list) { | |
a9dd3643 | 318 | flush_commit_list(sb, |
bd4c625c LT |
319 | journal->j_list_bitmap[i]. |
320 | journal_list, 1); | |
321 | if (!journal->j_list_bitmap[i].journal_list) { | |
322 | break; | |
323 | } | |
324 | } else { | |
325 | break; | |
326 | } | |
327 | } | |
328 | if (jb->journal_list) { /* double check to make sure if flushed correctly */ | |
329 | return NULL; | |
330 | } | |
331 | jb->journal_list = jl; | |
332 | return jb; | |
1da177e4 LT |
333 | } |
334 | ||
0222e657 | 335 | /* |
1da177e4 LT |
336 | ** allocates a new chunk of X nodes, and links them all together as a list. |
337 | ** Uses the cnode->next and cnode->prev pointers | |
338 | ** returns NULL on failure | |
339 | */ | |
bd4c625c LT |
340 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) |
341 | { | |
342 | struct reiserfs_journal_cnode *head; | |
343 | int i; | |
344 | if (num_cnodes <= 0) { | |
345 | return NULL; | |
346 | } | |
558feb08 | 347 | head = vzalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); |
bd4c625c LT |
348 | if (!head) { |
349 | return NULL; | |
350 | } | |
bd4c625c LT |
351 | head[0].prev = NULL; |
352 | head[0].next = head + 1; | |
353 | for (i = 1; i < num_cnodes; i++) { | |
354 | head[i].prev = head + (i - 1); | |
355 | head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ | |
356 | } | |
357 | head[num_cnodes - 1].next = NULL; | |
358 | return head; | |
1da177e4 LT |
359 | } |
360 | ||
361 | /* | |
0222e657 | 362 | ** pulls a cnode off the free list, or returns NULL on failure |
1da177e4 | 363 | */ |
a9dd3643 | 364 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) |
bd4c625c LT |
365 | { |
366 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 367 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 368 | |
a9dd3643 | 369 | reiserfs_check_lock_depth(sb, "get_cnode"); |
bd4c625c LT |
370 | |
371 | if (journal->j_cnode_free <= 0) { | |
372 | return NULL; | |
373 | } | |
374 | journal->j_cnode_used++; | |
375 | journal->j_cnode_free--; | |
376 | cn = journal->j_cnode_free_list; | |
377 | if (!cn) { | |
378 | return cn; | |
379 | } | |
380 | if (cn->next) { | |
381 | cn->next->prev = NULL; | |
382 | } | |
383 | journal->j_cnode_free_list = cn->next; | |
384 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); | |
385 | return cn; | |
1da177e4 LT |
386 | } |
387 | ||
388 | /* | |
0222e657 | 389 | ** returns a cnode to the free list |
1da177e4 | 390 | */ |
a9dd3643 | 391 | static void free_cnode(struct super_block *sb, |
bd4c625c LT |
392 | struct reiserfs_journal_cnode *cn) |
393 | { | |
a9dd3643 | 394 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 395 | |
a9dd3643 | 396 | reiserfs_check_lock_depth(sb, "free_cnode"); |
1da177e4 | 397 | |
bd4c625c LT |
398 | journal->j_cnode_used--; |
399 | journal->j_cnode_free++; | |
400 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ | |
401 | cn->next = journal->j_cnode_free_list; | |
402 | if (journal->j_cnode_free_list) { | |
403 | journal->j_cnode_free_list->prev = cn; | |
404 | } | |
405 | cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ | |
406 | journal->j_cnode_free_list = cn; | |
1da177e4 LT |
407 | } |
408 | ||
bd4c625c LT |
409 | static void clear_prepared_bits(struct buffer_head *bh) |
410 | { | |
411 | clear_buffer_journal_prepared(bh); | |
412 | clear_buffer_journal_restore_dirty(bh); | |
1da177e4 LT |
413 | } |
414 | ||
1da177e4 | 415 | /* return a cnode with same dev, block number and size in table, or null if not found */ |
bd4c625c LT |
416 | static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct |
417 | super_block | |
418 | *sb, | |
419 | struct | |
420 | reiserfs_journal_cnode | |
421 | **table, | |
422 | long bl) | |
1da177e4 | 423 | { |
bd4c625c LT |
424 | struct reiserfs_journal_cnode *cn; |
425 | cn = journal_hash(table, sb, bl); | |
426 | while (cn) { | |
427 | if (cn->blocknr == bl && cn->sb == sb) | |
428 | return cn; | |
429 | cn = cn->hnext; | |
430 | } | |
431 | return (struct reiserfs_journal_cnode *)0; | |
1da177e4 LT |
432 | } |
433 | ||
434 | /* | |
435 | ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated | |
436 | ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever | |
437 | ** being overwritten by a replay after crashing. | |
438 | ** | |
439 | ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting | |
440 | ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make | |
441 | ** sure you never write the block without logging it. | |
442 | ** | |
443 | ** next_zero_bit is a suggestion about the next block to try for find_forward. | |
444 | ** when bl is rejected because it is set in a journal list bitmap, we search | |
445 | ** for the next zero bit in the bitmap that rejected bl. Then, we return that | |
446 | ** through next_zero_bit for find_forward to try. | |
447 | ** | |
448 | ** Just because we return something in next_zero_bit does not mean we won't | |
449 | ** reject it on the next call to reiserfs_in_journal | |
450 | ** | |
451 | */ | |
a9dd3643 | 452 | int reiserfs_in_journal(struct super_block *sb, |
3ee16670 | 453 | unsigned int bmap_nr, int bit_nr, int search_all, |
bd4c625c LT |
454 | b_blocknr_t * next_zero_bit) |
455 | { | |
a9dd3643 | 456 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
457 | struct reiserfs_journal_cnode *cn; |
458 | struct reiserfs_list_bitmap *jb; | |
459 | int i; | |
460 | unsigned long bl; | |
461 | ||
462 | *next_zero_bit = 0; /* always start this at zero. */ | |
463 | ||
a9dd3643 | 464 | PROC_INFO_INC(sb, journal.in_journal); |
bd4c625c LT |
465 | /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. |
466 | ** if we crash before the transaction that freed it commits, this transaction won't | |
467 | ** have committed either, and the block will never be written | |
468 | */ | |
469 | if (search_all) { | |
470 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
a9dd3643 | 471 | PROC_INFO_INC(sb, journal.in_journal_bitmap); |
bd4c625c LT |
472 | jb = journal->j_list_bitmap + i; |
473 | if (jb->journal_list && jb->bitmaps[bmap_nr] && | |
474 | test_bit(bit_nr, | |
475 | (unsigned long *)jb->bitmaps[bmap_nr]-> | |
476 | data)) { | |
477 | *next_zero_bit = | |
478 | find_next_zero_bit((unsigned long *) | |
479 | (jb->bitmaps[bmap_nr]-> | |
480 | data), | |
a9dd3643 | 481 | sb->s_blocksize << 3, |
bd4c625c LT |
482 | bit_nr + 1); |
483 | return 1; | |
484 | } | |
485 | } | |
486 | } | |
487 | ||
a9dd3643 | 488 | bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; |
bd4c625c LT |
489 | /* is it in any old transactions? */ |
490 | if (search_all | |
491 | && (cn = | |
a9dd3643 | 492 | get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { |
bd4c625c LT |
493 | return 1; |
494 | } | |
495 | ||
496 | /* is it in the current transaction. This should never happen */ | |
a9dd3643 | 497 | if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) { |
bd4c625c LT |
498 | BUG(); |
499 | return 1; | |
500 | } | |
501 | ||
a9dd3643 | 502 | PROC_INFO_INC(sb, journal.in_journal_reusable); |
bd4c625c LT |
503 | /* safe for reuse */ |
504 | return 0; | |
1da177e4 LT |
505 | } |
506 | ||
507 | /* insert cn into table | |
508 | */ | |
bd4c625c LT |
509 | static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, |
510 | struct reiserfs_journal_cnode *cn) | |
511 | { | |
512 | struct reiserfs_journal_cnode *cn_orig; | |
1da177e4 | 513 | |
bd4c625c LT |
514 | cn_orig = journal_hash(table, cn->sb, cn->blocknr); |
515 | cn->hnext = cn_orig; | |
516 | cn->hprev = NULL; | |
517 | if (cn_orig) { | |
518 | cn_orig->hprev = cn; | |
519 | } | |
520 | journal_hash(table, cn->sb, cn->blocknr) = cn; | |
1da177e4 LT |
521 | } |
522 | ||
523 | /* lock the current transaction */ | |
a9dd3643 | 524 | static inline void lock_journal(struct super_block *sb) |
bd4c625c | 525 | { |
a9dd3643 | 526 | PROC_INFO_INC(sb, journal.lock_journal); |
8ebc4232 FW |
527 | |
528 | reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb); | |
1da177e4 LT |
529 | } |
530 | ||
531 | /* unlock the current transaction */ | |
a9dd3643 | 532 | static inline void unlock_journal(struct super_block *sb) |
bd4c625c | 533 | { |
a9dd3643 | 534 | mutex_unlock(&SB_JOURNAL(sb)->j_mutex); |
1da177e4 LT |
535 | } |
536 | ||
537 | static inline void get_journal_list(struct reiserfs_journal_list *jl) | |
538 | { | |
bd4c625c | 539 | jl->j_refcount++; |
1da177e4 LT |
540 | } |
541 | ||
542 | static inline void put_journal_list(struct super_block *s, | |
bd4c625c | 543 | struct reiserfs_journal_list *jl) |
1da177e4 | 544 | { |
bd4c625c | 545 | if (jl->j_refcount < 1) { |
c3a9c210 | 546 | reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d", |
bd4c625c LT |
547 | jl->j_trans_id, jl->j_refcount); |
548 | } | |
549 | if (--jl->j_refcount == 0) | |
d739b42b | 550 | kfree(jl); |
1da177e4 LT |
551 | } |
552 | ||
553 | /* | |
554 | ** this used to be much more involved, and I'm keeping it just in case things get ugly again. | |
555 | ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a | |
556 | ** transaction. | |
557 | */ | |
a9dd3643 | 558 | static void cleanup_freed_for_journal_list(struct super_block *sb, |
bd4c625c LT |
559 | struct reiserfs_journal_list *jl) |
560 | { | |
1da177e4 | 561 | |
bd4c625c LT |
562 | struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; |
563 | if (jb) { | |
a9dd3643 | 564 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
565 | } |
566 | jl->j_list_bitmap->journal_list = NULL; | |
567 | jl->j_list_bitmap = NULL; | |
1da177e4 LT |
568 | } |
569 | ||
570 | static int journal_list_still_alive(struct super_block *s, | |
600ed416 | 571 | unsigned int trans_id) |
bd4c625c LT |
572 | { |
573 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
574 | struct list_head *entry = &journal->j_journal_list; | |
575 | struct reiserfs_journal_list *jl; | |
576 | ||
577 | if (!list_empty(entry)) { | |
578 | jl = JOURNAL_LIST_ENTRY(entry->next); | |
579 | if (jl->j_trans_id <= trans_id) { | |
580 | return 1; | |
581 | } | |
582 | } | |
583 | return 0; | |
584 | } | |
585 | ||
398c95bd CM |
586 | /* |
587 | * If page->mapping was null, we failed to truncate this page for | |
588 | * some reason. Most likely because it was truncated after being | |
589 | * logged via data=journal. | |
590 | * | |
591 | * This does a check to see if the buffer belongs to one of these | |
592 | * lost pages before doing the final put_bh. If page->mapping was | |
593 | * null, it tries to free buffers on the page, which should make the | |
594 | * final page_cache_release drop the page from the lru. | |
595 | */ | |
596 | static void release_buffer_page(struct buffer_head *bh) | |
597 | { | |
598 | struct page *page = bh->b_page; | |
529ae9aa | 599 | if (!page->mapping && trylock_page(page)) { |
398c95bd CM |
600 | page_cache_get(page); |
601 | put_bh(bh); | |
602 | if (!page->mapping) | |
603 | try_to_free_buffers(page); | |
604 | unlock_page(page); | |
605 | page_cache_release(page); | |
606 | } else { | |
607 | put_bh(bh); | |
608 | } | |
609 | } | |
610 | ||
bd4c625c LT |
611 | static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) |
612 | { | |
613 | char b[BDEVNAME_SIZE]; | |
614 | ||
615 | if (buffer_journaled(bh)) { | |
45b03d5e JM |
616 | reiserfs_warning(NULL, "clm-2084", |
617 | "pinned buffer %lu:%s sent to disk", | |
bd4c625c LT |
618 | bh->b_blocknr, bdevname(bh->b_bdev, b)); |
619 | } | |
620 | if (uptodate) | |
621 | set_buffer_uptodate(bh); | |
622 | else | |
623 | clear_buffer_uptodate(bh); | |
398c95bd | 624 | |
bd4c625c | 625 | unlock_buffer(bh); |
398c95bd | 626 | release_buffer_page(bh); |
bd4c625c LT |
627 | } |
628 | ||
629 | static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) | |
630 | { | |
631 | if (uptodate) | |
632 | set_buffer_uptodate(bh); | |
633 | else | |
634 | clear_buffer_uptodate(bh); | |
635 | unlock_buffer(bh); | |
636 | put_bh(bh); | |
637 | } | |
638 | ||
639 | static void submit_logged_buffer(struct buffer_head *bh) | |
640 | { | |
641 | get_bh(bh); | |
642 | bh->b_end_io = reiserfs_end_buffer_io_sync; | |
643 | clear_buffer_journal_new(bh); | |
644 | clear_buffer_dirty(bh); | |
645 | if (!test_clear_buffer_journal_test(bh)) | |
646 | BUG(); | |
647 | if (!buffer_uptodate(bh)) | |
648 | BUG(); | |
649 | submit_bh(WRITE, bh); | |
650 | } | |
651 | ||
652 | static void submit_ordered_buffer(struct buffer_head *bh) | |
653 | { | |
654 | get_bh(bh); | |
655 | bh->b_end_io = reiserfs_end_ordered_io; | |
656 | clear_buffer_dirty(bh); | |
657 | if (!buffer_uptodate(bh)) | |
658 | BUG(); | |
659 | submit_bh(WRITE, bh); | |
660 | } | |
661 | ||
1da177e4 LT |
662 | #define CHUNK_SIZE 32 |
663 | struct buffer_chunk { | |
bd4c625c LT |
664 | struct buffer_head *bh[CHUNK_SIZE]; |
665 | int nr; | |
1da177e4 LT |
666 | }; |
667 | ||
bd4c625c LT |
668 | static void write_chunk(struct buffer_chunk *chunk) |
669 | { | |
670 | int i; | |
bd4c625c LT |
671 | for (i = 0; i < chunk->nr; i++) { |
672 | submit_logged_buffer(chunk->bh[i]); | |
673 | } | |
674 | chunk->nr = 0; | |
1da177e4 LT |
675 | } |
676 | ||
bd4c625c LT |
677 | static void write_ordered_chunk(struct buffer_chunk *chunk) |
678 | { | |
679 | int i; | |
bd4c625c LT |
680 | for (i = 0; i < chunk->nr; i++) { |
681 | submit_ordered_buffer(chunk->bh[i]); | |
682 | } | |
683 | chunk->nr = 0; | |
1da177e4 LT |
684 | } |
685 | ||
686 | static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, | |
bd4c625c | 687 | spinlock_t * lock, void (fn) (struct buffer_chunk *)) |
1da177e4 | 688 | { |
bd4c625c | 689 | int ret = 0; |
14a61442 | 690 | BUG_ON(chunk->nr >= CHUNK_SIZE); |
bd4c625c LT |
691 | chunk->bh[chunk->nr++] = bh; |
692 | if (chunk->nr >= CHUNK_SIZE) { | |
693 | ret = 1; | |
694 | if (lock) | |
695 | spin_unlock(lock); | |
696 | fn(chunk); | |
697 | if (lock) | |
698 | spin_lock(lock); | |
699 | } | |
700 | return ret; | |
1da177e4 LT |
701 | } |
702 | ||
1da177e4 | 703 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); |
bd4c625c LT |
704 | static struct reiserfs_jh *alloc_jh(void) |
705 | { | |
706 | struct reiserfs_jh *jh; | |
707 | while (1) { | |
708 | jh = kmalloc(sizeof(*jh), GFP_NOFS); | |
709 | if (jh) { | |
710 | atomic_inc(&nr_reiserfs_jh); | |
711 | return jh; | |
712 | } | |
713 | yield(); | |
1da177e4 | 714 | } |
1da177e4 LT |
715 | } |
716 | ||
717 | /* | |
718 | * we want to free the jh when the buffer has been written | |
719 | * and waited on | |
720 | */ | |
bd4c625c LT |
721 | void reiserfs_free_jh(struct buffer_head *bh) |
722 | { | |
723 | struct reiserfs_jh *jh; | |
724 | ||
725 | jh = bh->b_private; | |
726 | if (jh) { | |
727 | bh->b_private = NULL; | |
728 | jh->bh = NULL; | |
729 | list_del_init(&jh->list); | |
730 | kfree(jh); | |
731 | if (atomic_read(&nr_reiserfs_jh) <= 0) | |
732 | BUG(); | |
733 | atomic_dec(&nr_reiserfs_jh); | |
734 | put_bh(bh); | |
735 | } | |
1da177e4 LT |
736 | } |
737 | ||
738 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, | |
bd4c625c | 739 | int tail) |
1da177e4 | 740 | { |
bd4c625c | 741 | struct reiserfs_jh *jh; |
1da177e4 | 742 | |
bd4c625c LT |
743 | if (bh->b_private) { |
744 | spin_lock(&j->j_dirty_buffers_lock); | |
745 | if (!bh->b_private) { | |
746 | spin_unlock(&j->j_dirty_buffers_lock); | |
747 | goto no_jh; | |
748 | } | |
749 | jh = bh->b_private; | |
750 | list_del_init(&jh->list); | |
751 | } else { | |
752 | no_jh: | |
753 | get_bh(bh); | |
754 | jh = alloc_jh(); | |
755 | spin_lock(&j->j_dirty_buffers_lock); | |
756 | /* buffer must be locked for __add_jh, should be able to have | |
757 | * two adds at the same time | |
758 | */ | |
14a61442 | 759 | BUG_ON(bh->b_private); |
bd4c625c LT |
760 | jh->bh = bh; |
761 | bh->b_private = jh; | |
1da177e4 | 762 | } |
bd4c625c LT |
763 | jh->jl = j->j_current_jl; |
764 | if (tail) | |
765 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); | |
766 | else { | |
767 | list_add_tail(&jh->list, &jh->jl->j_bh_list); | |
768 | } | |
769 | spin_unlock(&j->j_dirty_buffers_lock); | |
770 | return 0; | |
1da177e4 LT |
771 | } |
772 | ||
bd4c625c LT |
773 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) |
774 | { | |
775 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); | |
1da177e4 | 776 | } |
bd4c625c LT |
777 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) |
778 | { | |
779 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); | |
1da177e4 LT |
780 | } |
781 | ||
782 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) | |
bd4c625c | 783 | static int write_ordered_buffers(spinlock_t * lock, |
1da177e4 | 784 | struct reiserfs_journal *j, |
bd4c625c | 785 | struct reiserfs_journal_list *jl, |
1da177e4 LT |
786 | struct list_head *list) |
787 | { | |
bd4c625c LT |
788 | struct buffer_head *bh; |
789 | struct reiserfs_jh *jh; | |
790 | int ret = j->j_errno; | |
791 | struct buffer_chunk chunk; | |
792 | struct list_head tmp; | |
793 | INIT_LIST_HEAD(&tmp); | |
794 | ||
795 | chunk.nr = 0; | |
796 | spin_lock(lock); | |
797 | while (!list_empty(list)) { | |
798 | jh = JH_ENTRY(list->next); | |
799 | bh = jh->bh; | |
800 | get_bh(bh); | |
ca5de404 | 801 | if (!trylock_buffer(bh)) { |
bd4c625c | 802 | if (!buffer_dirty(bh)) { |
f116629d | 803 | list_move(&jh->list, &tmp); |
bd4c625c LT |
804 | goto loop_next; |
805 | } | |
806 | spin_unlock(lock); | |
807 | if (chunk.nr) | |
808 | write_ordered_chunk(&chunk); | |
809 | wait_on_buffer(bh); | |
810 | cond_resched(); | |
811 | spin_lock(lock); | |
812 | goto loop_next; | |
813 | } | |
3d4492f8 CM |
814 | /* in theory, dirty non-uptodate buffers should never get here, |
815 | * but the upper layer io error paths still have a few quirks. | |
816 | * Handle them here as gracefully as we can | |
817 | */ | |
818 | if (!buffer_uptodate(bh) && buffer_dirty(bh)) { | |
819 | clear_buffer_dirty(bh); | |
820 | ret = -EIO; | |
821 | } | |
bd4c625c | 822 | if (buffer_dirty(bh)) { |
f116629d | 823 | list_move(&jh->list, &tmp); |
bd4c625c LT |
824 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); |
825 | } else { | |
826 | reiserfs_free_jh(bh); | |
827 | unlock_buffer(bh); | |
828 | } | |
829 | loop_next: | |
830 | put_bh(bh); | |
831 | cond_resched_lock(lock); | |
832 | } | |
833 | if (chunk.nr) { | |
834 | spin_unlock(lock); | |
1da177e4 | 835 | write_ordered_chunk(&chunk); |
bd4c625c | 836 | spin_lock(lock); |
1da177e4 | 837 | } |
bd4c625c LT |
838 | while (!list_empty(&tmp)) { |
839 | jh = JH_ENTRY(tmp.prev); | |
840 | bh = jh->bh; | |
841 | get_bh(bh); | |
842 | reiserfs_free_jh(bh); | |
843 | ||
844 | if (buffer_locked(bh)) { | |
845 | spin_unlock(lock); | |
846 | wait_on_buffer(bh); | |
847 | spin_lock(lock); | |
848 | } | |
849 | if (!buffer_uptodate(bh)) { | |
850 | ret = -EIO; | |
851 | } | |
d62b1b87 CM |
852 | /* ugly interaction with invalidatepage here. |
853 | * reiserfs_invalidate_page will pin any buffer that has a valid | |
854 | * journal head from an older transaction. If someone else sets | |
855 | * our buffer dirty after we write it in the first loop, and | |
856 | * then someone truncates the page away, nobody will ever write | |
857 | * the buffer. We're safe if we write the page one last time | |
858 | * after freeing the journal header. | |
859 | */ | |
860 | if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { | |
861 | spin_unlock(lock); | |
862 | ll_rw_block(WRITE, 1, &bh); | |
863 | spin_lock(lock); | |
864 | } | |
bd4c625c LT |
865 | put_bh(bh); |
866 | cond_resched_lock(lock); | |
1da177e4 | 867 | } |
bd4c625c LT |
868 | spin_unlock(lock); |
869 | return ret; | |
870 | } | |
1da177e4 | 871 | |
bd4c625c LT |
872 | static int flush_older_commits(struct super_block *s, |
873 | struct reiserfs_journal_list *jl) | |
874 | { | |
875 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
876 | struct reiserfs_journal_list *other_jl; | |
877 | struct reiserfs_journal_list *first_jl; | |
878 | struct list_head *entry; | |
600ed416 JM |
879 | unsigned int trans_id = jl->j_trans_id; |
880 | unsigned int other_trans_id; | |
881 | unsigned int first_trans_id; | |
bd4c625c LT |
882 | |
883 | find_first: | |
884 | /* | |
885 | * first we walk backwards to find the oldest uncommitted transation | |
886 | */ | |
887 | first_jl = jl; | |
888 | entry = jl->j_list.prev; | |
889 | while (1) { | |
890 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
891 | if (entry == &journal->j_journal_list || | |
892 | atomic_read(&other_jl->j_older_commits_done)) | |
893 | break; | |
1da177e4 | 894 | |
bd4c625c LT |
895 | first_jl = other_jl; |
896 | entry = other_jl->j_list.prev; | |
897 | } | |
1da177e4 | 898 | |
bd4c625c LT |
899 | /* if we didn't find any older uncommitted transactions, return now */ |
900 | if (first_jl == jl) { | |
901 | return 0; | |
902 | } | |
1da177e4 | 903 | |
bd4c625c LT |
904 | first_trans_id = first_jl->j_trans_id; |
905 | ||
906 | entry = &first_jl->j_list; | |
907 | while (1) { | |
908 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
909 | other_trans_id = other_jl->j_trans_id; | |
910 | ||
911 | if (other_trans_id < trans_id) { | |
912 | if (atomic_read(&other_jl->j_commit_left) != 0) { | |
913 | flush_commit_list(s, other_jl, 0); | |
914 | ||
915 | /* list we were called with is gone, return */ | |
916 | if (!journal_list_still_alive(s, trans_id)) | |
917 | return 1; | |
918 | ||
919 | /* the one we just flushed is gone, this means all | |
920 | * older lists are also gone, so first_jl is no longer | |
921 | * valid either. Go back to the beginning. | |
922 | */ | |
923 | if (!journal_list_still_alive | |
924 | (s, other_trans_id)) { | |
925 | goto find_first; | |
926 | } | |
927 | } | |
928 | entry = entry->next; | |
929 | if (entry == &journal->j_journal_list) | |
930 | return 0; | |
931 | } else { | |
932 | return 0; | |
1da177e4 | 933 | } |
1da177e4 | 934 | } |
bd4c625c | 935 | return 0; |
1da177e4 | 936 | } |
deba0f49 AB |
937 | |
938 | static int reiserfs_async_progress_wait(struct super_block *s) | |
bd4c625c | 939 | { |
bd4c625c | 940 | struct reiserfs_journal *j = SB_JOURNAL(s); |
8ebc4232 FW |
941 | |
942 | if (atomic_read(&j->j_async_throttle)) { | |
278f6679 JM |
943 | int depth; |
944 | ||
945 | depth = reiserfs_write_unlock_nested(s); | |
8aa7e847 | 946 | congestion_wait(BLK_RW_ASYNC, HZ / 10); |
278f6679 | 947 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 FW |
948 | } |
949 | ||
bd4c625c | 950 | return 0; |
1da177e4 LT |
951 | } |
952 | ||
953 | /* | |
954 | ** if this journal list still has commit blocks unflushed, send them to disk. | |
955 | ** | |
956 | ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) | |
957 | ** Before the commit block can by written, every other log block must be safely on disk | |
958 | ** | |
959 | */ | |
bd4c625c LT |
960 | static int flush_commit_list(struct super_block *s, |
961 | struct reiserfs_journal_list *jl, int flushall) | |
962 | { | |
963 | int i; | |
3ee16670 | 964 | b_blocknr_t bn; |
bd4c625c | 965 | struct buffer_head *tbh = NULL; |
600ed416 | 966 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 967 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
bd4c625c | 968 | int retval = 0; |
e0e851cf | 969 | int write_len; |
278f6679 | 970 | int depth; |
bd4c625c LT |
971 | |
972 | reiserfs_check_lock_depth(s, "flush_commit_list"); | |
973 | ||
974 | if (atomic_read(&jl->j_older_commits_done)) { | |
975 | return 0; | |
976 | } | |
977 | ||
bd4c625c LT |
978 | /* before we can put our commit blocks on disk, we have to make sure everyone older than |
979 | ** us is on disk too | |
980 | */ | |
981 | BUG_ON(jl->j_len <= 0); | |
982 | BUG_ON(trans_id == journal->j_trans_id); | |
983 | ||
984 | get_journal_list(jl); | |
985 | if (flushall) { | |
986 | if (flush_older_commits(s, jl) == 1) { | |
987 | /* list disappeared during flush_older_commits. return */ | |
988 | goto put_jl; | |
989 | } | |
990 | } | |
991 | ||
992 | /* make sure nobody is trying to flush this one at the same time */ | |
8ebc4232 FW |
993 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); |
994 | ||
bd4c625c | 995 | if (!journal_list_still_alive(s, trans_id)) { |
90415dea | 996 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
997 | goto put_jl; |
998 | } | |
999 | BUG_ON(jl->j_trans_id == 0); | |
1000 | ||
1001 | /* this commit is done, exit */ | |
1002 | if (atomic_read(&(jl->j_commit_left)) <= 0) { | |
1003 | if (flushall) { | |
1004 | atomic_set(&(jl->j_older_commits_done), 1); | |
1005 | } | |
90415dea | 1006 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1007 | goto put_jl; |
1008 | } | |
1009 | ||
1010 | if (!list_empty(&jl->j_bh_list)) { | |
3d4492f8 | 1011 | int ret; |
8ebc4232 FW |
1012 | |
1013 | /* | |
1014 | * We might sleep in numerous places inside | |
1015 | * write_ordered_buffers. Relax the write lock. | |
1016 | */ | |
278f6679 | 1017 | depth = reiserfs_write_unlock_nested(s); |
3d4492f8 CM |
1018 | ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, |
1019 | journal, jl, &jl->j_bh_list); | |
1020 | if (ret < 0 && retval == 0) | |
1021 | retval = ret; | |
278f6679 | 1022 | reiserfs_write_lock_nested(s, depth); |
bd4c625c LT |
1023 | } |
1024 | BUG_ON(!list_empty(&jl->j_bh_list)); | |
1025 | /* | |
1026 | * for the description block and all the log blocks, submit any buffers | |
e0e851cf CM |
1027 | * that haven't already reached the disk. Try to write at least 256 |
1028 | * log blocks. later on, we will only wait on blocks that correspond | |
1029 | * to this transaction, but while we're unplugging we might as well | |
1030 | * get a chunk of data on there. | |
bd4c625c LT |
1031 | */ |
1032 | atomic_inc(&journal->j_async_throttle); | |
e0e851cf CM |
1033 | write_len = jl->j_len + 1; |
1034 | if (write_len < 256) | |
1035 | write_len = 256; | |
1036 | for (i = 0 ; i < write_len ; i++) { | |
bd4c625c LT |
1037 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % |
1038 | SB_ONDISK_JOURNAL_SIZE(s); | |
1039 | tbh = journal_find_get_block(s, bn); | |
e0e851cf | 1040 | if (tbh) { |
6e3647ac | 1041 | if (buffer_dirty(tbh)) { |
278f6679 | 1042 | depth = reiserfs_write_unlock_nested(s); |
6e3647ac | 1043 | ll_rw_block(WRITE, 1, &tbh); |
278f6679 | 1044 | reiserfs_write_lock_nested(s, depth); |
6e3647ac | 1045 | } |
e0e851cf CM |
1046 | put_bh(tbh) ; |
1047 | } | |
bd4c625c LT |
1048 | } |
1049 | atomic_dec(&journal->j_async_throttle); | |
1050 | ||
bd4c625c LT |
1051 | for (i = 0; i < (jl->j_len + 1); i++) { |
1052 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + | |
1053 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); | |
1054 | tbh = journal_find_get_block(s, bn); | |
8ebc4232 | 1055 | |
278f6679 JM |
1056 | depth = reiserfs_write_unlock_nested(s); |
1057 | __wait_on_buffer(tbh); | |
1058 | reiserfs_write_lock_nested(s, depth); | |
bd4c625c LT |
1059 | // since we're using ll_rw_blk above, it might have skipped over |
1060 | // a locked buffer. Double check here | |
1061 | // | |
8ebc4232 FW |
1062 | /* redundant, sync_dirty_buffer() checks */ |
1063 | if (buffer_dirty(tbh)) { | |
278f6679 | 1064 | depth = reiserfs_write_unlock_nested(s); |
bd4c625c | 1065 | sync_dirty_buffer(tbh); |
278f6679 | 1066 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 1067 | } |
bd4c625c | 1068 | if (unlikely(!buffer_uptodate(tbh))) { |
1da177e4 | 1069 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1070 | reiserfs_warning(s, "journal-601", |
1071 | "buffer write failed"); | |
1da177e4 | 1072 | #endif |
bd4c625c LT |
1073 | retval = -EIO; |
1074 | } | |
1075 | put_bh(tbh); /* once for journal_find_get_block */ | |
1076 | put_bh(tbh); /* once due to original getblk in do_journal_end */ | |
1077 | atomic_dec(&(jl->j_commit_left)); | |
1078 | } | |
1079 | ||
1080 | BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); | |
1081 | ||
7cd33ad2 CH |
1082 | /* If there was a write error in the journal - we can't commit |
1083 | * this transaction - it will be invalid and, if successful, | |
1084 | * will just end up propagating the write error out to | |
1085 | * the file system. */ | |
1086 | if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { | |
1087 | if (buffer_dirty(jl->j_commit_bh)) | |
1088 | BUG(); | |
1089 | mark_buffer_dirty(jl->j_commit_bh) ; | |
278f6679 | 1090 | depth = reiserfs_write_unlock_nested(s); |
7cd33ad2 CH |
1091 | if (reiserfs_barrier_flush(s)) |
1092 | __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); | |
1093 | else | |
1094 | sync_dirty_buffer(jl->j_commit_bh); | |
278f6679 | 1095 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 1096 | } |
bd4c625c | 1097 | |
bd4c625c LT |
1098 | /* If there was a write error in the journal - we can't commit this |
1099 | * transaction - it will be invalid and, if successful, will just end | |
beb7dd86 | 1100 | * up propagating the write error out to the filesystem. */ |
bd4c625c | 1101 | if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { |
1da177e4 | 1102 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e | 1103 | reiserfs_warning(s, "journal-615", "buffer write failed"); |
1da177e4 | 1104 | #endif |
bd4c625c LT |
1105 | retval = -EIO; |
1106 | } | |
1107 | bforget(jl->j_commit_bh); | |
1108 | if (journal->j_last_commit_id != 0 && | |
1109 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { | |
45b03d5e | 1110 | reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", |
bd4c625c LT |
1111 | journal->j_last_commit_id, jl->j_trans_id); |
1112 | } | |
1113 | journal->j_last_commit_id = jl->j_trans_id; | |
1114 | ||
1115 | /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ | |
1116 | cleanup_freed_for_journal_list(s, jl); | |
1117 | ||
1118 | retval = retval ? retval : journal->j_errno; | |
1119 | ||
1120 | /* mark the metadata dirty */ | |
1121 | if (!retval) | |
1122 | dirty_one_transaction(s, jl); | |
1123 | atomic_dec(&(jl->j_commit_left)); | |
1124 | ||
1125 | if (flushall) { | |
1126 | atomic_set(&(jl->j_older_commits_done), 1); | |
1127 | } | |
90415dea | 1128 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1129 | put_jl: |
1130 | put_journal_list(s, jl); | |
1131 | ||
1132 | if (retval) | |
1133 | reiserfs_abort(s, retval, "Journal write error in %s", | |
fbe5498b | 1134 | __func__); |
bd4c625c | 1135 | return retval; |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | /* | |
0222e657 JM |
1139 | ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or |
1140 | ** returns NULL if it can't find anything | |
1da177e4 | 1141 | */ |
bd4c625c LT |
1142 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct |
1143 | reiserfs_journal_cnode | |
1144 | *cn) | |
1145 | { | |
1146 | struct super_block *sb = cn->sb; | |
1147 | b_blocknr_t blocknr = cn->blocknr; | |
1da177e4 | 1148 | |
bd4c625c LT |
1149 | cn = cn->hprev; |
1150 | while (cn) { | |
1151 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { | |
1152 | return cn->jlist; | |
1153 | } | |
1154 | cn = cn->hprev; | |
1155 | } | |
1156 | return NULL; | |
1da177e4 LT |
1157 | } |
1158 | ||
bd4c625c LT |
1159 | static void remove_journal_hash(struct super_block *, |
1160 | struct reiserfs_journal_cnode **, | |
1161 | struct reiserfs_journal_list *, unsigned long, | |
1162 | int); | |
1da177e4 LT |
1163 | |
1164 | /* | |
1165 | ** once all the real blocks have been flushed, it is safe to remove them from the | |
1166 | ** journal list for this transaction. Aside from freeing the cnode, this also allows the | |
1167 | ** block to be reallocated for data blocks if it had been deleted. | |
1168 | */ | |
a9dd3643 | 1169 | static void remove_all_from_journal_list(struct super_block *sb, |
bd4c625c LT |
1170 | struct reiserfs_journal_list *jl, |
1171 | int debug) | |
1172 | { | |
a9dd3643 | 1173 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1174 | struct reiserfs_journal_cnode *cn, *last; |
1175 | cn = jl->j_realblock; | |
1176 | ||
1177 | /* which is better, to lock once around the whole loop, or | |
1178 | ** to lock for each call to remove_journal_hash? | |
1179 | */ | |
1180 | while (cn) { | |
1181 | if (cn->blocknr != 0) { | |
1182 | if (debug) { | |
a9dd3643 | 1183 | reiserfs_warning(sb, "reiserfs-2201", |
bd4c625c LT |
1184 | "block %u, bh is %d, state %ld", |
1185 | cn->blocknr, cn->bh ? 1 : 0, | |
1186 | cn->state); | |
1187 | } | |
1188 | cn->state = 0; | |
a9dd3643 | 1189 | remove_journal_hash(sb, journal->j_list_hash_table, |
bd4c625c LT |
1190 | jl, cn->blocknr, 1); |
1191 | } | |
1192 | last = cn; | |
1193 | cn = cn->next; | |
a9dd3643 | 1194 | free_cnode(sb, last); |
bd4c625c LT |
1195 | } |
1196 | jl->j_realblock = NULL; | |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | /* | |
1200 | ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. | |
1201 | ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start | |
1202 | ** releasing blocks in this transaction for reuse as data blocks. | |
1203 | ** called by flush_journal_list, before it calls remove_all_from_journal_list | |
1204 | ** | |
1205 | */ | |
a9dd3643 | 1206 | static int _update_journal_header_block(struct super_block *sb, |
bd4c625c | 1207 | unsigned long offset, |
600ed416 | 1208 | unsigned int trans_id) |
bd4c625c LT |
1209 | { |
1210 | struct reiserfs_journal_header *jh; | |
a9dd3643 | 1211 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
278f6679 | 1212 | int depth; |
1da177e4 | 1213 | |
bd4c625c LT |
1214 | if (reiserfs_is_journal_aborted(journal)) |
1215 | return -EIO; | |
1da177e4 | 1216 | |
bd4c625c LT |
1217 | if (trans_id >= journal->j_last_flush_trans_id) { |
1218 | if (buffer_locked((journal->j_header_bh))) { | |
278f6679 JM |
1219 | depth = reiserfs_write_unlock_nested(sb); |
1220 | __wait_on_buffer(journal->j_header_bh); | |
1221 | reiserfs_write_lock_nested(sb, depth); | |
bd4c625c | 1222 | if (unlikely(!buffer_uptodate(journal->j_header_bh))) { |
1da177e4 | 1223 | #ifdef CONFIG_REISERFS_CHECK |
a9dd3643 | 1224 | reiserfs_warning(sb, "journal-699", |
45b03d5e | 1225 | "buffer write failed"); |
1da177e4 | 1226 | #endif |
bd4c625c LT |
1227 | return -EIO; |
1228 | } | |
1229 | } | |
1230 | journal->j_last_flush_trans_id = trans_id; | |
1231 | journal->j_first_unflushed_offset = offset; | |
1232 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> | |
1233 | b_data); | |
1234 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id); | |
1235 | jh->j_first_unflushed_offset = cpu_to_le32(offset); | |
1236 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id); | |
1237 | ||
7cd33ad2 | 1238 | set_buffer_dirty(journal->j_header_bh); |
278f6679 | 1239 | depth = reiserfs_write_unlock_nested(sb); |
7cd33ad2 CH |
1240 | |
1241 | if (reiserfs_barrier_flush(sb)) | |
1242 | __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); | |
1243 | else | |
bd4c625c | 1244 | sync_dirty_buffer(journal->j_header_bh); |
7cd33ad2 | 1245 | |
278f6679 | 1246 | reiserfs_write_lock_nested(sb, depth); |
bd4c625c | 1247 | if (!buffer_uptodate(journal->j_header_bh)) { |
a9dd3643 | 1248 | reiserfs_warning(sb, "journal-837", |
45b03d5e | 1249 | "IO error during journal replay"); |
bd4c625c LT |
1250 | return -EIO; |
1251 | } | |
1252 | } | |
1253 | return 0; | |
1254 | } | |
1255 | ||
a9dd3643 | 1256 | static int update_journal_header_block(struct super_block *sb, |
bd4c625c | 1257 | unsigned long offset, |
600ed416 | 1258 | unsigned int trans_id) |
bd4c625c | 1259 | { |
a9dd3643 | 1260 | return _update_journal_header_block(sb, offset, trans_id); |
1da177e4 | 1261 | } |
bd4c625c | 1262 | |
0222e657 JM |
1263 | /* |
1264 | ** flush any and all journal lists older than you are | |
1da177e4 LT |
1265 | ** can only be called from flush_journal_list |
1266 | */ | |
a9dd3643 | 1267 | static int flush_older_journal_lists(struct super_block *sb, |
bd4c625c LT |
1268 | struct reiserfs_journal_list *jl) |
1269 | { | |
1270 | struct list_head *entry; | |
1271 | struct reiserfs_journal_list *other_jl; | |
a9dd3643 | 1272 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
600ed416 | 1273 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c LT |
1274 | |
1275 | /* we know we are the only ones flushing things, no extra race | |
1276 | * protection is required. | |
1277 | */ | |
1278 | restart: | |
1279 | entry = journal->j_journal_list.next; | |
1280 | /* Did we wrap? */ | |
1281 | if (entry == &journal->j_journal_list) | |
1282 | return 0; | |
1283 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
1284 | if (other_jl->j_trans_id < trans_id) { | |
1285 | BUG_ON(other_jl->j_refcount <= 0); | |
1286 | /* do not flush all */ | |
a9dd3643 | 1287 | flush_journal_list(sb, other_jl, 0); |
bd4c625c LT |
1288 | |
1289 | /* other_jl is now deleted from the list */ | |
1290 | goto restart; | |
1291 | } | |
1292 | return 0; | |
1da177e4 LT |
1293 | } |
1294 | ||
1295 | static void del_from_work_list(struct super_block *s, | |
bd4c625c LT |
1296 | struct reiserfs_journal_list *jl) |
1297 | { | |
1298 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1299 | if (!list_empty(&jl->j_working_list)) { | |
1300 | list_del_init(&jl->j_working_list); | |
1301 | journal->j_num_work_lists--; | |
1302 | } | |
1da177e4 LT |
1303 | } |
1304 | ||
1305 | /* flush a journal list, both commit and real blocks | |
1306 | ** | |
1307 | ** always set flushall to 1, unless you are calling from inside | |
1308 | ** flush_journal_list | |
1309 | ** | |
0222e657 JM |
1310 | ** IMPORTANT. This can only be called while there are no journal writers, |
1311 | ** and the journal is locked. That means it can only be called from | |
1da177e4 LT |
1312 | ** do_journal_end, or by journal_release |
1313 | */ | |
bd4c625c LT |
1314 | static int flush_journal_list(struct super_block *s, |
1315 | struct reiserfs_journal_list *jl, int flushall) | |
1da177e4 | 1316 | { |
bd4c625c LT |
1317 | struct reiserfs_journal_list *pjl; |
1318 | struct reiserfs_journal_cnode *cn, *last; | |
1319 | int count; | |
1320 | int was_jwait = 0; | |
1321 | int was_dirty = 0; | |
1322 | struct buffer_head *saved_bh; | |
1323 | unsigned long j_len_saved = jl->j_len; | |
1324 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1325 | int err = 0; | |
278f6679 | 1326 | int depth; |
bd4c625c LT |
1327 | |
1328 | BUG_ON(j_len_saved <= 0); | |
1329 | ||
1330 | if (atomic_read(&journal->j_wcount) != 0) { | |
45b03d5e | 1331 | reiserfs_warning(s, "clm-2048", "called with wcount %d", |
bd4c625c LT |
1332 | atomic_read(&journal->j_wcount)); |
1333 | } | |
1da177e4 | 1334 | |
bd4c625c LT |
1335 | /* if flushall == 0, the lock is already held */ |
1336 | if (flushall) { | |
8ebc4232 | 1337 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
afe70259 | 1338 | } else if (mutex_trylock(&journal->j_flush_mutex)) { |
bd4c625c LT |
1339 | BUG(); |
1340 | } | |
1da177e4 | 1341 | |
bd4c625c LT |
1342 | count = 0; |
1343 | if (j_len_saved > journal->j_trans_max) { | |
c3a9c210 | 1344 | reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", |
bd4c625c LT |
1345 | j_len_saved, jl->j_trans_id); |
1346 | return 0; | |
1347 | } | |
1da177e4 | 1348 | |
bd4c625c LT |
1349 | /* if all the work is already done, get out of here */ |
1350 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1351 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1352 | goto flush_older_and_return; | |
1353 | } | |
1354 | ||
0222e657 | 1355 | /* start by putting the commit list on disk. This will also flush |
bd4c625c LT |
1356 | ** the commit lists of any olders transactions |
1357 | */ | |
1358 | flush_commit_list(s, jl, 1); | |
1359 | ||
1360 | if (!(jl->j_state & LIST_DIRTY) | |
1361 | && !reiserfs_is_journal_aborted(journal)) | |
1362 | BUG(); | |
1363 | ||
1364 | /* are we done now? */ | |
1365 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1366 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1367 | goto flush_older_and_return; | |
1368 | } | |
1369 | ||
0222e657 JM |
1370 | /* loop through each cnode, see if we need to write it, |
1371 | ** or wait on a more recent transaction, or just ignore it | |
bd4c625c LT |
1372 | */ |
1373 | if (atomic_read(&(journal->j_wcount)) != 0) { | |
c3a9c210 JM |
1374 | reiserfs_panic(s, "journal-844", "journal list is flushing, " |
1375 | "wcount is not 0"); | |
bd4c625c LT |
1376 | } |
1377 | cn = jl->j_realblock; | |
1378 | while (cn) { | |
1379 | was_jwait = 0; | |
1380 | was_dirty = 0; | |
1381 | saved_bh = NULL; | |
1382 | /* blocknr of 0 is no longer in the hash, ignore it */ | |
1383 | if (cn->blocknr == 0) { | |
1384 | goto free_cnode; | |
1385 | } | |
1386 | ||
1387 | /* This transaction failed commit. Don't write out to the disk */ | |
1388 | if (!(jl->j_state & LIST_DIRTY)) | |
1389 | goto free_cnode; | |
1390 | ||
1391 | pjl = find_newer_jl_for_cn(cn); | |
1392 | /* the order is important here. We check pjl to make sure we | |
1393 | ** don't clear BH_JDirty_wait if we aren't the one writing this | |
1394 | ** block to disk | |
1395 | */ | |
1396 | if (!pjl && cn->bh) { | |
1397 | saved_bh = cn->bh; | |
1398 | ||
0222e657 JM |
1399 | /* we do this to make sure nobody releases the buffer while |
1400 | ** we are working with it | |
bd4c625c LT |
1401 | */ |
1402 | get_bh(saved_bh); | |
1403 | ||
1404 | if (buffer_journal_dirty(saved_bh)) { | |
1405 | BUG_ON(!can_dirty(cn)); | |
1406 | was_jwait = 1; | |
1407 | was_dirty = 1; | |
1408 | } else if (can_dirty(cn)) { | |
1409 | /* everything with !pjl && jwait should be writable */ | |
1410 | BUG(); | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | /* if someone has this block in a newer transaction, just make | |
0779bf2d | 1415 | ** sure they are committed, and don't try writing it to disk |
bd4c625c LT |
1416 | */ |
1417 | if (pjl) { | |
1418 | if (atomic_read(&pjl->j_commit_left)) | |
1419 | flush_commit_list(s, pjl, 1); | |
1420 | goto free_cnode; | |
1421 | } | |
1422 | ||
0222e657 JM |
1423 | /* bh == NULL when the block got to disk on its own, OR, |
1424 | ** the block got freed in a future transaction | |
bd4c625c LT |
1425 | */ |
1426 | if (saved_bh == NULL) { | |
1427 | goto free_cnode; | |
1428 | } | |
1429 | ||
1430 | /* this should never happen. kupdate_one_transaction has this list | |
1431 | ** locked while it works, so we should never see a buffer here that | |
1432 | ** is not marked JDirty_wait | |
1433 | */ | |
1434 | if ((!was_jwait) && !buffer_locked(saved_bh)) { | |
45b03d5e JM |
1435 | reiserfs_warning(s, "journal-813", |
1436 | "BAD! buffer %llu %cdirty %cjwait, " | |
bd4c625c LT |
1437 | "not in a newer tranasction", |
1438 | (unsigned long long)saved_bh-> | |
1439 | b_blocknr, was_dirty ? ' ' : '!', | |
1440 | was_jwait ? ' ' : '!'); | |
1441 | } | |
1442 | if (was_dirty) { | |
1443 | /* we inc again because saved_bh gets decremented at free_cnode */ | |
1444 | get_bh(saved_bh); | |
1445 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state); | |
1446 | lock_buffer(saved_bh); | |
1447 | BUG_ON(cn->blocknr != saved_bh->b_blocknr); | |
1448 | if (buffer_dirty(saved_bh)) | |
1449 | submit_logged_buffer(saved_bh); | |
1450 | else | |
1451 | unlock_buffer(saved_bh); | |
1452 | count++; | |
1453 | } else { | |
45b03d5e JM |
1454 | reiserfs_warning(s, "clm-2082", |
1455 | "Unable to flush buffer %llu in %s", | |
bd4c625c | 1456 | (unsigned long long)saved_bh-> |
fbe5498b | 1457 | b_blocknr, __func__); |
bd4c625c LT |
1458 | } |
1459 | free_cnode: | |
1460 | last = cn; | |
1461 | cn = cn->next; | |
1462 | if (saved_bh) { | |
1463 | /* we incremented this to keep others from taking the buffer head away */ | |
1464 | put_bh(saved_bh); | |
1465 | if (atomic_read(&(saved_bh->b_count)) < 0) { | |
45b03d5e JM |
1466 | reiserfs_warning(s, "journal-945", |
1467 | "saved_bh->b_count < 0"); | |
bd4c625c LT |
1468 | } |
1469 | } | |
1470 | } | |
1471 | if (count > 0) { | |
1472 | cn = jl->j_realblock; | |
1473 | while (cn) { | |
1474 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { | |
1475 | if (!cn->bh) { | |
c3a9c210 JM |
1476 | reiserfs_panic(s, "journal-1011", |
1477 | "cn->bh is NULL"); | |
bd4c625c | 1478 | } |
8ebc4232 | 1479 | |
278f6679 JM |
1480 | depth = reiserfs_write_unlock_nested(s); |
1481 | __wait_on_buffer(cn->bh); | |
1482 | reiserfs_write_lock_nested(s, depth); | |
8ebc4232 | 1483 | |
bd4c625c | 1484 | if (!cn->bh) { |
c3a9c210 JM |
1485 | reiserfs_panic(s, "journal-1012", |
1486 | "cn->bh is NULL"); | |
bd4c625c LT |
1487 | } |
1488 | if (unlikely(!buffer_uptodate(cn->bh))) { | |
1489 | #ifdef CONFIG_REISERFS_CHECK | |
45b03d5e JM |
1490 | reiserfs_warning(s, "journal-949", |
1491 | "buffer write failed"); | |
bd4c625c LT |
1492 | #endif |
1493 | err = -EIO; | |
1494 | } | |
1495 | /* note, we must clear the JDirty_wait bit after the up to date | |
1496 | ** check, otherwise we race against our flushpage routine | |
1497 | */ | |
1498 | BUG_ON(!test_clear_buffer_journal_dirty | |
1499 | (cn->bh)); | |
1500 | ||
398c95bd | 1501 | /* drop one ref for us */ |
bd4c625c | 1502 | put_bh(cn->bh); |
398c95bd CM |
1503 | /* drop one ref for journal_mark_dirty */ |
1504 | release_buffer_page(cn->bh); | |
bd4c625c LT |
1505 | } |
1506 | cn = cn->next; | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | if (err) | |
1511 | reiserfs_abort(s, -EIO, | |
1512 | "Write error while pushing transaction to disk in %s", | |
fbe5498b | 1513 | __func__); |
bd4c625c LT |
1514 | flush_older_and_return: |
1515 | ||
0222e657 | 1516 | /* before we can update the journal header block, we _must_ flush all |
bd4c625c LT |
1517 | ** real blocks from all older transactions to disk. This is because |
1518 | ** once the header block is updated, this transaction will not be | |
1519 | ** replayed after a crash | |
1520 | */ | |
1521 | if (flushall) { | |
1522 | flush_older_journal_lists(s, jl); | |
1523 | } | |
1524 | ||
1525 | err = journal->j_errno; | |
0222e657 | 1526 | /* before we can remove everything from the hash tables for this |
bd4c625c LT |
1527 | ** transaction, we must make sure it can never be replayed |
1528 | ** | |
1529 | ** since we are only called from do_journal_end, we know for sure there | |
1530 | ** are no allocations going on while we are flushing journal lists. So, | |
1531 | ** we only need to update the journal header block for the last list | |
1532 | ** being flushed | |
1533 | */ | |
1534 | if (!err && flushall) { | |
1535 | err = | |
1536 | update_journal_header_block(s, | |
1537 | (jl->j_start + jl->j_len + | |
1538 | 2) % SB_ONDISK_JOURNAL_SIZE(s), | |
1539 | jl->j_trans_id); | |
1540 | if (err) | |
1541 | reiserfs_abort(s, -EIO, | |
1542 | "Write error while updating journal header in %s", | |
fbe5498b | 1543 | __func__); |
bd4c625c LT |
1544 | } |
1545 | remove_all_from_journal_list(s, jl, 0); | |
1546 | list_del_init(&jl->j_list); | |
1547 | journal->j_num_lists--; | |
1548 | del_from_work_list(s, jl); | |
1549 | ||
1550 | if (journal->j_last_flush_id != 0 && | |
1551 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { | |
45b03d5e | 1552 | reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", |
bd4c625c LT |
1553 | journal->j_last_flush_id, jl->j_trans_id); |
1554 | } | |
1555 | journal->j_last_flush_id = jl->j_trans_id; | |
1556 | ||
1557 | /* not strictly required since we are freeing the list, but it should | |
1558 | * help find code using dead lists later on | |
1559 | */ | |
1560 | jl->j_len = 0; | |
1561 | atomic_set(&(jl->j_nonzerolen), 0); | |
1562 | jl->j_start = 0; | |
1563 | jl->j_realblock = NULL; | |
1564 | jl->j_commit_bh = NULL; | |
1565 | jl->j_trans_id = 0; | |
1566 | jl->j_state = 0; | |
1567 | put_journal_list(s, jl); | |
1568 | if (flushall) | |
afe70259 | 1569 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1570 | return err; |
1571 | } | |
1572 | ||
1573 | static int write_one_transaction(struct super_block *s, | |
1574 | struct reiserfs_journal_list *jl, | |
1575 | struct buffer_chunk *chunk) | |
1576 | { | |
1577 | struct reiserfs_journal_cnode *cn; | |
1578 | int ret = 0; | |
1579 | ||
1580 | jl->j_state |= LIST_TOUCHED; | |
1581 | del_from_work_list(s, jl); | |
1582 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { | |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | cn = jl->j_realblock; | |
1587 | while (cn) { | |
1588 | /* if the blocknr == 0, this has been cleared from the hash, | |
1589 | ** skip it | |
1590 | */ | |
1591 | if (cn->blocknr == 0) { | |
1592 | goto next; | |
1593 | } | |
1594 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { | |
1595 | struct buffer_head *tmp_bh; | |
1596 | /* we can race against journal_mark_freed when we try | |
1597 | * to lock_buffer(cn->bh), so we have to inc the buffer | |
1598 | * count, and recheck things after locking | |
1599 | */ | |
1600 | tmp_bh = cn->bh; | |
1601 | get_bh(tmp_bh); | |
1602 | lock_buffer(tmp_bh); | |
1603 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { | |
1604 | if (!buffer_journal_dirty(tmp_bh) || | |
1605 | buffer_journal_prepared(tmp_bh)) | |
1606 | BUG(); | |
1607 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); | |
1608 | ret++; | |
1609 | } else { | |
1610 | /* note, cn->bh might be null now */ | |
1611 | unlock_buffer(tmp_bh); | |
1612 | } | |
1613 | put_bh(tmp_bh); | |
1614 | } | |
1615 | next: | |
1616 | cn = cn->next; | |
1617 | cond_resched(); | |
1618 | } | |
1619 | return ret; | |
1620 | } | |
1621 | ||
1622 | /* used by flush_commit_list */ | |
1623 | static int dirty_one_transaction(struct super_block *s, | |
1624 | struct reiserfs_journal_list *jl) | |
1625 | { | |
1626 | struct reiserfs_journal_cnode *cn; | |
1627 | struct reiserfs_journal_list *pjl; | |
1628 | int ret = 0; | |
1629 | ||
1630 | jl->j_state |= LIST_DIRTY; | |
1631 | cn = jl->j_realblock; | |
1632 | while (cn) { | |
1633 | /* look for a more recent transaction that logged this | |
1634 | ** buffer. Only the most recent transaction with a buffer in | |
1635 | ** it is allowed to send that buffer to disk | |
1636 | */ | |
1637 | pjl = find_newer_jl_for_cn(cn); | |
1638 | if (!pjl && cn->blocknr && cn->bh | |
1639 | && buffer_journal_dirty(cn->bh)) { | |
1640 | BUG_ON(!can_dirty(cn)); | |
1641 | /* if the buffer is prepared, it will either be logged | |
1642 | * or restored. If restored, we need to make sure | |
1643 | * it actually gets marked dirty | |
1644 | */ | |
1645 | clear_buffer_journal_new(cn->bh); | |
1646 | if (buffer_journal_prepared(cn->bh)) { | |
1647 | set_buffer_journal_restore_dirty(cn->bh); | |
1648 | } else { | |
1649 | set_buffer_journal_test(cn->bh); | |
1650 | mark_buffer_dirty(cn->bh); | |
1651 | } | |
1652 | } | |
1653 | cn = cn->next; | |
1654 | } | |
1655 | return ret; | |
1656 | } | |
1657 | ||
1658 | static int kupdate_transactions(struct super_block *s, | |
1659 | struct reiserfs_journal_list *jl, | |
1660 | struct reiserfs_journal_list **next_jl, | |
600ed416 | 1661 | unsigned int *next_trans_id, |
bd4c625c LT |
1662 | int num_blocks, int num_trans) |
1663 | { | |
1664 | int ret = 0; | |
1665 | int written = 0; | |
1666 | int transactions_flushed = 0; | |
600ed416 | 1667 | unsigned int orig_trans_id = jl->j_trans_id; |
bd4c625c LT |
1668 | struct buffer_chunk chunk; |
1669 | struct list_head *entry; | |
1670 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1671 | chunk.nr = 0; | |
1672 | ||
a412f9ef | 1673 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
bd4c625c LT |
1674 | if (!journal_list_still_alive(s, orig_trans_id)) { |
1675 | goto done; | |
1676 | } | |
1677 | ||
afe70259 | 1678 | /* we've got j_flush_mutex held, nobody is going to delete any |
bd4c625c LT |
1679 | * of these lists out from underneath us |
1680 | */ | |
1681 | while ((num_trans && transactions_flushed < num_trans) || | |
1682 | (!num_trans && written < num_blocks)) { | |
1683 | ||
1684 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || | |
1685 | atomic_read(&jl->j_commit_left) | |
1686 | || !(jl->j_state & LIST_DIRTY)) { | |
1687 | del_from_work_list(s, jl); | |
1688 | break; | |
1689 | } | |
1690 | ret = write_one_transaction(s, jl, &chunk); | |
1691 | ||
1692 | if (ret < 0) | |
1693 | goto done; | |
1694 | transactions_flushed++; | |
1695 | written += ret; | |
1696 | entry = jl->j_list.next; | |
1697 | ||
1698 | /* did we wrap? */ | |
1699 | if (entry == &journal->j_journal_list) { | |
1700 | break; | |
1701 | } | |
1702 | jl = JOURNAL_LIST_ENTRY(entry); | |
1703 | ||
1704 | /* don't bother with older transactions */ | |
1705 | if (jl->j_trans_id <= orig_trans_id) | |
1706 | break; | |
1707 | } | |
1708 | if (chunk.nr) { | |
1709 | write_chunk(&chunk); | |
1710 | } | |
1711 | ||
1712 | done: | |
afe70259 | 1713 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1714 | return ret; |
1715 | } | |
1716 | ||
1717 | /* for o_sync and fsync heavy applications, they tend to use | |
1718 | ** all the journa list slots with tiny transactions. These | |
1719 | ** trigger lots and lots of calls to update the header block, which | |
1720 | ** adds seeks and slows things down. | |
1721 | ** | |
1722 | ** This function tries to clear out a large chunk of the journal lists | |
1723 | ** at once, which makes everything faster since only the newest journal | |
1da177e4 LT |
1724 | ** list updates the header block |
1725 | */ | |
1726 | static int flush_used_journal_lists(struct super_block *s, | |
bd4c625c LT |
1727 | struct reiserfs_journal_list *jl) |
1728 | { | |
1729 | unsigned long len = 0; | |
1730 | unsigned long cur_len; | |
1731 | int ret; | |
1732 | int i; | |
1733 | int limit = 256; | |
1734 | struct reiserfs_journal_list *tjl; | |
1735 | struct reiserfs_journal_list *flush_jl; | |
600ed416 | 1736 | unsigned int trans_id; |
bd4c625c LT |
1737 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1738 | ||
1739 | flush_jl = tjl = jl; | |
1740 | ||
1741 | /* in data logging mode, try harder to flush a lot of blocks */ | |
1742 | if (reiserfs_data_log(s)) | |
1743 | limit = 1024; | |
1744 | /* flush for 256 transactions or limit blocks, whichever comes first */ | |
1745 | for (i = 0; i < 256 && len < limit; i++) { | |
1746 | if (atomic_read(&tjl->j_commit_left) || | |
1747 | tjl->j_trans_id < jl->j_trans_id) { | |
1748 | break; | |
1749 | } | |
1750 | cur_len = atomic_read(&tjl->j_nonzerolen); | |
1751 | if (cur_len > 0) { | |
1752 | tjl->j_state &= ~LIST_TOUCHED; | |
1753 | } | |
1754 | len += cur_len; | |
1755 | flush_jl = tjl; | |
1756 | if (tjl->j_list.next == &journal->j_journal_list) | |
1757 | break; | |
1758 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); | |
1759 | } | |
721a769c JM |
1760 | get_journal_list(jl); |
1761 | get_journal_list(flush_jl); | |
bd4c625c LT |
1762 | /* try to find a group of blocks we can flush across all the |
1763 | ** transactions, but only bother if we've actually spanned | |
1764 | ** across multiple lists | |
1765 | */ | |
1766 | if (flush_jl != jl) { | |
1767 | ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); | |
1768 | } | |
1769 | flush_journal_list(s, flush_jl, 1); | |
721a769c JM |
1770 | put_journal_list(s, flush_jl); |
1771 | put_journal_list(s, jl); | |
bd4c625c | 1772 | return 0; |
1da177e4 LT |
1773 | } |
1774 | ||
1775 | /* | |
1776 | ** removes any nodes in table with name block and dev as bh. | |
1777 | ** only touchs the hnext and hprev pointers. | |
1778 | */ | |
1779 | void remove_journal_hash(struct super_block *sb, | |
bd4c625c LT |
1780 | struct reiserfs_journal_cnode **table, |
1781 | struct reiserfs_journal_list *jl, | |
1782 | unsigned long block, int remove_freed) | |
1783 | { | |
1784 | struct reiserfs_journal_cnode *cur; | |
1785 | struct reiserfs_journal_cnode **head; | |
1786 | ||
1787 | head = &(journal_hash(table, sb, block)); | |
1788 | if (!head) { | |
1789 | return; | |
1790 | } | |
1791 | cur = *head; | |
1792 | while (cur) { | |
1793 | if (cur->blocknr == block && cur->sb == sb | |
1794 | && (jl == NULL || jl == cur->jlist) | |
1795 | && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { | |
1796 | if (cur->hnext) { | |
1797 | cur->hnext->hprev = cur->hprev; | |
1798 | } | |
1799 | if (cur->hprev) { | |
1800 | cur->hprev->hnext = cur->hnext; | |
1801 | } else { | |
1802 | *head = cur->hnext; | |
1803 | } | |
1804 | cur->blocknr = 0; | |
1805 | cur->sb = NULL; | |
1806 | cur->state = 0; | |
1807 | if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ | |
1808 | atomic_dec(&(cur->jlist->j_nonzerolen)); | |
1809 | cur->bh = NULL; | |
1810 | cur->jlist = NULL; | |
1811 | } | |
1812 | cur = cur->hnext; | |
1813 | } | |
1814 | } | |
1815 | ||
a9dd3643 | 1816 | static void free_journal_ram(struct super_block *sb) |
bd4c625c | 1817 | { |
a9dd3643 | 1818 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
d739b42b | 1819 | kfree(journal->j_current_jl); |
bd4c625c LT |
1820 | journal->j_num_lists--; |
1821 | ||
1822 | vfree(journal->j_cnode_free_orig); | |
a9dd3643 JM |
1823 | free_list_bitmaps(sb, journal->j_list_bitmap); |
1824 | free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ | |
bd4c625c LT |
1825 | if (journal->j_header_bh) { |
1826 | brelse(journal->j_header_bh); | |
1827 | } | |
1828 | /* j_header_bh is on the journal dev, make sure not to release the journal | |
1829 | * dev until we brelse j_header_bh | |
1830 | */ | |
a9dd3643 | 1831 | release_journal_dev(sb, journal); |
bd4c625c | 1832 | vfree(journal); |
1da177e4 LT |
1833 | } |
1834 | ||
1835 | /* | |
1836 | ** call on unmount. Only set error to 1 if you haven't made your way out | |
1837 | ** of read_super() yet. Any other caller must keep error at 0. | |
1838 | */ | |
bd4c625c | 1839 | static int do_journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1840 | struct super_block *sb, int error) |
bd4c625c LT |
1841 | { |
1842 | struct reiserfs_transaction_handle myth; | |
1843 | int flushed = 0; | |
a9dd3643 | 1844 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1845 | |
1846 | /* we only want to flush out transactions if we were called with error == 0 | |
1847 | */ | |
a9dd3643 | 1848 | if (!error && !(sb->s_flags & MS_RDONLY)) { |
bd4c625c LT |
1849 | /* end the current trans */ |
1850 | BUG_ON(!th->t_trans_id); | |
a9dd3643 | 1851 | do_journal_end(th, sb, 10, FLUSH_ALL); |
bd4c625c LT |
1852 | |
1853 | /* make sure something gets logged to force our way into the flush code */ | |
a9dd3643 JM |
1854 | if (!journal_join(&myth, sb, 1)) { |
1855 | reiserfs_prepare_for_journal(sb, | |
1856 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1857 | 1); |
a9dd3643 JM |
1858 | journal_mark_dirty(&myth, sb, |
1859 | SB_BUFFER_WITH_SB(sb)); | |
1860 | do_journal_end(&myth, sb, 1, FLUSH_ALL); | |
bd4c625c LT |
1861 | flushed = 1; |
1862 | } | |
1863 | } | |
1864 | ||
1865 | /* this also catches errors during the do_journal_end above */ | |
1866 | if (!error && reiserfs_is_journal_aborted(journal)) { | |
1867 | memset(&myth, 0, sizeof(myth)); | |
a9dd3643 JM |
1868 | if (!journal_join_abort(&myth, sb, 1)) { |
1869 | reiserfs_prepare_for_journal(sb, | |
1870 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1871 | 1); |
a9dd3643 JM |
1872 | journal_mark_dirty(&myth, sb, |
1873 | SB_BUFFER_WITH_SB(sb)); | |
1874 | do_journal_end(&myth, sb, 1, FLUSH_ALL); | |
bd4c625c LT |
1875 | } |
1876 | } | |
1877 | ||
bd4c625c | 1878 | /* wait for all commits to finish */ |
a9dd3643 | 1879 | cancel_delayed_work(&SB_JOURNAL(sb)->j_work); |
8ebc4232 FW |
1880 | |
1881 | /* | |
1882 | * We must release the write lock here because | |
1883 | * the workqueue job (flush_async_commit) needs this lock | |
1884 | */ | |
1885 | reiserfs_write_unlock(sb); | |
033369d1 AB |
1886 | |
1887 | cancel_delayed_work_sync(&REISERFS_SB(sb)->old_work); | |
797d9016 | 1888 | flush_workqueue(REISERFS_SB(sb)->commit_wq); |
bd4c625c | 1889 | |
a9dd3643 | 1890 | free_journal_ram(sb); |
bd4c625c | 1891 | |
0523676d FW |
1892 | reiserfs_write_lock(sb); |
1893 | ||
bd4c625c | 1894 | return 0; |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | /* | |
1898 | ** call on unmount. flush all journal trans, release all alloc'd ram | |
1899 | */ | |
bd4c625c | 1900 | int journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1901 | struct super_block *sb) |
bd4c625c | 1902 | { |
a9dd3643 | 1903 | return do_journal_release(th, sb, 0); |
1da177e4 | 1904 | } |
bd4c625c | 1905 | |
1da177e4 LT |
1906 | /* |
1907 | ** only call from an error condition inside reiserfs_read_super! | |
1908 | */ | |
bd4c625c | 1909 | int journal_release_error(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1910 | struct super_block *sb) |
bd4c625c | 1911 | { |
a9dd3643 | 1912 | return do_journal_release(th, sb, 1); |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ | |
a9dd3643 | 1916 | static int journal_compare_desc_commit(struct super_block *sb, |
bd4c625c LT |
1917 | struct reiserfs_journal_desc *desc, |
1918 | struct reiserfs_journal_commit *commit) | |
1919 | { | |
1920 | if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || | |
1921 | get_commit_trans_len(commit) != get_desc_trans_len(desc) || | |
a9dd3643 | 1922 | get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || |
bd4c625c LT |
1923 | get_commit_trans_len(commit) <= 0) { |
1924 | return 1; | |
1925 | } | |
1926 | return 0; | |
1da177e4 | 1927 | } |
bd4c625c | 1928 | |
0222e657 | 1929 | /* returns 0 if it did not find a description block |
1da177e4 | 1930 | ** returns -1 if it found a corrupt commit block |
0222e657 | 1931 | ** returns 1 if both desc and commit were valid |
278f6679 | 1932 | ** NOTE: only called during fs mount |
1da177e4 | 1933 | */ |
a9dd3643 | 1934 | static int journal_transaction_is_valid(struct super_block *sb, |
bd4c625c | 1935 | struct buffer_head *d_bh, |
600ed416 | 1936 | unsigned int *oldest_invalid_trans_id, |
bd4c625c LT |
1937 | unsigned long *newest_mount_id) |
1938 | { | |
1939 | struct reiserfs_journal_desc *desc; | |
1940 | struct reiserfs_journal_commit *commit; | |
1941 | struct buffer_head *c_bh; | |
1942 | unsigned long offset; | |
1943 | ||
1944 | if (!d_bh) | |
1945 | return 0; | |
1946 | ||
1947 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
1948 | if (get_desc_trans_len(desc) > 0 | |
1949 | && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { | |
1950 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id | |
1951 | && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { | |
a9dd3643 | 1952 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
1953 | "journal-986: transaction " |
1954 | "is valid returning because trans_id %d is greater than " | |
1955 | "oldest_invalid %lu", | |
1956 | get_desc_trans_id(desc), | |
1957 | *oldest_invalid_trans_id); | |
1958 | return 0; | |
1959 | } | |
1960 | if (newest_mount_id | |
1961 | && *newest_mount_id > get_desc_mount_id(desc)) { | |
a9dd3643 | 1962 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
1963 | "journal-1087: transaction " |
1964 | "is valid returning because mount_id %d is less than " | |
1965 | "newest_mount_id %lu", | |
1966 | get_desc_mount_id(desc), | |
1967 | *newest_mount_id); | |
1968 | return -1; | |
1969 | } | |
a9dd3643 JM |
1970 | if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { |
1971 | reiserfs_warning(sb, "journal-2018", | |
45b03d5e JM |
1972 | "Bad transaction length %d " |
1973 | "encountered, ignoring transaction", | |
bd4c625c LT |
1974 | get_desc_trans_len(desc)); |
1975 | return -1; | |
1976 | } | |
a9dd3643 | 1977 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
1978 | |
1979 | /* ok, we have a journal description block, lets see if the transaction was valid */ | |
1980 | c_bh = | |
a9dd3643 JM |
1981 | journal_bread(sb, |
1982 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 1983 | ((offset + get_desc_trans_len(desc) + |
a9dd3643 | 1984 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
1985 | if (!c_bh) |
1986 | return 0; | |
1987 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
1988 | if (journal_compare_desc_commit(sb, desc, commit)) { |
1989 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
1990 | "journal_transaction_is_valid, commit offset %ld had bad " |
1991 | "time %d or length %d", | |
1992 | c_bh->b_blocknr - | |
a9dd3643 | 1993 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
1994 | get_commit_trans_id(commit), |
1995 | get_commit_trans_len(commit)); | |
1996 | brelse(c_bh); | |
1997 | if (oldest_invalid_trans_id) { | |
1998 | *oldest_invalid_trans_id = | |
1999 | get_desc_trans_id(desc); | |
a9dd3643 | 2000 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2001 | "journal-1004: " |
2002 | "transaction_is_valid setting oldest invalid trans_id " | |
2003 | "to %d", | |
2004 | get_desc_trans_id(desc)); | |
2005 | } | |
2006 | return -1; | |
2007 | } | |
2008 | brelse(c_bh); | |
a9dd3643 | 2009 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2010 | "journal-1006: found valid " |
2011 | "transaction start offset %llu, len %d id %d", | |
2012 | d_bh->b_blocknr - | |
a9dd3643 | 2013 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2014 | get_desc_trans_len(desc), |
2015 | get_desc_trans_id(desc)); | |
2016 | return 1; | |
2017 | } else { | |
2018 | return 0; | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | static void brelse_array(struct buffer_head **heads, int num) | |
2023 | { | |
2024 | int i; | |
2025 | for (i = 0; i < num; i++) { | |
2026 | brelse(heads[i]); | |
2027 | } | |
1da177e4 LT |
2028 | } |
2029 | ||
2030 | /* | |
2031 | ** given the start, and values for the oldest acceptable transactions, | |
278f6679 JM |
2032 | ** this either reads in a replays a transaction, or returns because the |
2033 | ** transaction is invalid, or too old. | |
2034 | ** NOTE: only called during fs mount | |
1da177e4 | 2035 | */ |
a9dd3643 | 2036 | static int journal_read_transaction(struct super_block *sb, |
bd4c625c LT |
2037 | unsigned long cur_dblock, |
2038 | unsigned long oldest_start, | |
600ed416 | 2039 | unsigned int oldest_trans_id, |
bd4c625c LT |
2040 | unsigned long newest_mount_id) |
2041 | { | |
a9dd3643 | 2042 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
2043 | struct reiserfs_journal_desc *desc; |
2044 | struct reiserfs_journal_commit *commit; | |
600ed416 | 2045 | unsigned int trans_id = 0; |
bd4c625c LT |
2046 | struct buffer_head *c_bh; |
2047 | struct buffer_head *d_bh; | |
2048 | struct buffer_head **log_blocks = NULL; | |
2049 | struct buffer_head **real_blocks = NULL; | |
600ed416 | 2050 | unsigned int trans_offset; |
bd4c625c LT |
2051 | int i; |
2052 | int trans_half; | |
2053 | ||
a9dd3643 | 2054 | d_bh = journal_bread(sb, cur_dblock); |
bd4c625c LT |
2055 | if (!d_bh) |
2056 | return 1; | |
2057 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
a9dd3643 JM |
2058 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2059 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " | |
bd4c625c | 2060 | "journal_read_transaction, offset %llu, len %d mount_id %d", |
a9dd3643 | 2061 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2062 | get_desc_trans_len(desc), get_desc_mount_id(desc)); |
2063 | if (get_desc_trans_id(desc) < oldest_trans_id) { | |
a9dd3643 | 2064 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " |
bd4c625c LT |
2065 | "journal_read_trans skipping because %lu is too old", |
2066 | cur_dblock - | |
a9dd3643 | 2067 | SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2068 | brelse(d_bh); |
2069 | return 1; | |
2070 | } | |
2071 | if (get_desc_mount_id(desc) != newest_mount_id) { | |
a9dd3643 | 2072 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " |
bd4c625c LT |
2073 | "journal_read_trans skipping because %d is != " |
2074 | "newest_mount_id %lu", get_desc_mount_id(desc), | |
2075 | newest_mount_id); | |
2076 | brelse(d_bh); | |
2077 | return 1; | |
2078 | } | |
a9dd3643 | 2079 | c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2080 | ((trans_offset + get_desc_trans_len(desc) + 1) % |
a9dd3643 | 2081 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2082 | if (!c_bh) { |
2083 | brelse(d_bh); | |
2084 | return 1; | |
2085 | } | |
2086 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2087 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2088 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2089 | "journal_read_transaction, " |
2090 | "commit offset %llu had bad time %d or length %d", | |
2091 | c_bh->b_blocknr - | |
a9dd3643 | 2092 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2093 | get_commit_trans_id(commit), |
2094 | get_commit_trans_len(commit)); | |
2095 | brelse(c_bh); | |
2096 | brelse(d_bh); | |
2097 | return 1; | |
2098 | } | |
3f8b5ee3 JM |
2099 | |
2100 | if (bdev_read_only(sb->s_bdev)) { | |
2101 | reiserfs_warning(sb, "clm-2076", | |
2102 | "device is readonly, unable to replay log"); | |
2103 | brelse(c_bh); | |
2104 | brelse(d_bh); | |
2105 | return -EROFS; | |
2106 | } | |
2107 | ||
bd4c625c LT |
2108 | trans_id = get_desc_trans_id(desc); |
2109 | /* now we know we've got a good transaction, and it was inside the valid time ranges */ | |
d739b42b PE |
2110 | log_blocks = kmalloc(get_desc_trans_len(desc) * |
2111 | sizeof(struct buffer_head *), GFP_NOFS); | |
2112 | real_blocks = kmalloc(get_desc_trans_len(desc) * | |
2113 | sizeof(struct buffer_head *), GFP_NOFS); | |
bd4c625c LT |
2114 | if (!log_blocks || !real_blocks) { |
2115 | brelse(c_bh); | |
2116 | brelse(d_bh); | |
d739b42b PE |
2117 | kfree(log_blocks); |
2118 | kfree(real_blocks); | |
a9dd3643 | 2119 | reiserfs_warning(sb, "journal-1169", |
45b03d5e | 2120 | "kmalloc failed, unable to mount FS"); |
bd4c625c LT |
2121 | return -1; |
2122 | } | |
2123 | /* get all the buffer heads */ | |
a9dd3643 | 2124 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
2125 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
2126 | log_blocks[i] = | |
a9dd3643 JM |
2127 | journal_getblk(sb, |
2128 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2129 | (trans_offset + 1 + |
a9dd3643 | 2130 | i) % SB_ONDISK_JOURNAL_SIZE(sb)); |
bd4c625c LT |
2131 | if (i < trans_half) { |
2132 | real_blocks[i] = | |
a9dd3643 | 2133 | sb_getblk(sb, |
bd4c625c LT |
2134 | le32_to_cpu(desc->j_realblock[i])); |
2135 | } else { | |
2136 | real_blocks[i] = | |
a9dd3643 | 2137 | sb_getblk(sb, |
bd4c625c LT |
2138 | le32_to_cpu(commit-> |
2139 | j_realblock[i - trans_half])); | |
2140 | } | |
a9dd3643 JM |
2141 | if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { |
2142 | reiserfs_warning(sb, "journal-1207", | |
45b03d5e JM |
2143 | "REPLAY FAILURE fsck required! " |
2144 | "Block to replay is outside of " | |
2145 | "filesystem"); | |
bd4c625c LT |
2146 | goto abort_replay; |
2147 | } | |
2148 | /* make sure we don't try to replay onto log or reserved area */ | |
2149 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
2150 | (sb, real_blocks[i]->b_blocknr)) { |
2151 | reiserfs_warning(sb, "journal-1204", | |
45b03d5e JM |
2152 | "REPLAY FAILURE fsck required! " |
2153 | "Trying to replay onto a log block"); | |
bd4c625c LT |
2154 | abort_replay: |
2155 | brelse_array(log_blocks, i); | |
2156 | brelse_array(real_blocks, i); | |
2157 | brelse(c_bh); | |
2158 | brelse(d_bh); | |
d739b42b PE |
2159 | kfree(log_blocks); |
2160 | kfree(real_blocks); | |
bd4c625c LT |
2161 | return -1; |
2162 | } | |
2163 | } | |
2164 | /* read in the log blocks, memcpy to the corresponding real block */ | |
2165 | ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); | |
2166 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
8ebc4232 | 2167 | |
bd4c625c LT |
2168 | wait_on_buffer(log_blocks[i]); |
2169 | if (!buffer_uptodate(log_blocks[i])) { | |
a9dd3643 | 2170 | reiserfs_warning(sb, "journal-1212", |
45b03d5e JM |
2171 | "REPLAY FAILURE fsck required! " |
2172 | "buffer write failed"); | |
bd4c625c LT |
2173 | brelse_array(log_blocks + i, |
2174 | get_desc_trans_len(desc) - i); | |
2175 | brelse_array(real_blocks, get_desc_trans_len(desc)); | |
2176 | brelse(c_bh); | |
2177 | brelse(d_bh); | |
d739b42b PE |
2178 | kfree(log_blocks); |
2179 | kfree(real_blocks); | |
bd4c625c LT |
2180 | return -1; |
2181 | } | |
2182 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, | |
2183 | real_blocks[i]->b_size); | |
2184 | set_buffer_uptodate(real_blocks[i]); | |
2185 | brelse(log_blocks[i]); | |
2186 | } | |
2187 | /* flush out the real blocks */ | |
2188 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2189 | set_buffer_dirty(real_blocks[i]); | |
9cb569d6 | 2190 | write_dirty_buffer(real_blocks[i], WRITE); |
bd4c625c LT |
2191 | } |
2192 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2193 | wait_on_buffer(real_blocks[i]); | |
2194 | if (!buffer_uptodate(real_blocks[i])) { | |
a9dd3643 | 2195 | reiserfs_warning(sb, "journal-1226", |
45b03d5e JM |
2196 | "REPLAY FAILURE, fsck required! " |
2197 | "buffer write failed"); | |
bd4c625c LT |
2198 | brelse_array(real_blocks + i, |
2199 | get_desc_trans_len(desc) - i); | |
2200 | brelse(c_bh); | |
2201 | brelse(d_bh); | |
d739b42b PE |
2202 | kfree(log_blocks); |
2203 | kfree(real_blocks); | |
bd4c625c LT |
2204 | return -1; |
2205 | } | |
2206 | brelse(real_blocks[i]); | |
2207 | } | |
2208 | cur_dblock = | |
a9dd3643 | 2209 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2210 | ((trans_offset + get_desc_trans_len(desc) + |
a9dd3643 JM |
2211 | 2) % SB_ONDISK_JOURNAL_SIZE(sb)); |
2212 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c | 2213 | "journal-1095: setting journal " "start to offset %ld", |
a9dd3643 | 2214 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2215 | |
2216 | /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ | |
a9dd3643 | 2217 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2218 | journal->j_last_flush_trans_id = trans_id; |
2219 | journal->j_trans_id = trans_id + 1; | |
a44c94a7 AZ |
2220 | /* check for trans_id overflow */ |
2221 | if (journal->j_trans_id == 0) | |
2222 | journal->j_trans_id = 10; | |
bd4c625c LT |
2223 | brelse(c_bh); |
2224 | brelse(d_bh); | |
d739b42b PE |
2225 | kfree(log_blocks); |
2226 | kfree(real_blocks); | |
bd4c625c | 2227 | return 0; |
1da177e4 LT |
2228 | } |
2229 | ||
2230 | /* This function reads blocks starting from block and to max_block of bufsize | |
2231 | size (but no more than BUFNR blocks at a time). This proved to improve | |
2232 | mounting speed on self-rebuilding raid5 arrays at least. | |
2233 | Right now it is only used from journal code. But later we might use it | |
2234 | from other places. | |
2235 | Note: Do not use journal_getblk/sb_getblk functions here! */ | |
3ee16670 JM |
2236 | static struct buffer_head *reiserfs_breada(struct block_device *dev, |
2237 | b_blocknr_t block, int bufsize, | |
2238 | b_blocknr_t max_block) | |
1da177e4 | 2239 | { |
bd4c625c | 2240 | struct buffer_head *bhlist[BUFNR]; |
1da177e4 | 2241 | unsigned int blocks = BUFNR; |
bd4c625c | 2242 | struct buffer_head *bh; |
1da177e4 | 2243 | int i, j; |
bd4c625c LT |
2244 | |
2245 | bh = __getblk(dev, block, bufsize); | |
2246 | if (buffer_uptodate(bh)) | |
2247 | return (bh); | |
2248 | ||
1da177e4 LT |
2249 | if (block + BUFNR > max_block) { |
2250 | blocks = max_block - block; | |
2251 | } | |
2252 | bhlist[0] = bh; | |
2253 | j = 1; | |
2254 | for (i = 1; i < blocks; i++) { | |
bd4c625c LT |
2255 | bh = __getblk(dev, block + i, bufsize); |
2256 | if (buffer_uptodate(bh)) { | |
2257 | brelse(bh); | |
1da177e4 | 2258 | break; |
bd4c625c LT |
2259 | } else |
2260 | bhlist[j++] = bh; | |
1da177e4 | 2261 | } |
bd4c625c LT |
2262 | ll_rw_block(READ, j, bhlist); |
2263 | for (i = 1; i < j; i++) | |
2264 | brelse(bhlist[i]); | |
1da177e4 | 2265 | bh = bhlist[0]; |
bd4c625c LT |
2266 | wait_on_buffer(bh); |
2267 | if (buffer_uptodate(bh)) | |
1da177e4 | 2268 | return bh; |
bd4c625c | 2269 | brelse(bh); |
1da177e4 LT |
2270 | return NULL; |
2271 | } | |
2272 | ||
2273 | /* | |
2274 | ** read and replay the log | |
278f6679 JM |
2275 | ** on a clean unmount, the journal header's next unflushed pointer will |
2276 | ** be to an invalid transaction. This tests that before finding all the | |
2277 | ** transactions in the log, which makes normal mount times fast. | |
2278 | ** After a crash, this starts with the next unflushed transaction, and | |
2279 | ** replays until it finds one too old, or invalid. | |
1da177e4 | 2280 | ** On exit, it sets things up so the first transaction will work correctly. |
278f6679 | 2281 | ** NOTE: only called during fs mount |
1da177e4 | 2282 | */ |
a9dd3643 | 2283 | static int journal_read(struct super_block *sb) |
bd4c625c | 2284 | { |
a9dd3643 | 2285 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 2286 | struct reiserfs_journal_desc *desc; |
600ed416 JM |
2287 | unsigned int oldest_trans_id = 0; |
2288 | unsigned int oldest_invalid_trans_id = 0; | |
bd4c625c LT |
2289 | time_t start; |
2290 | unsigned long oldest_start = 0; | |
2291 | unsigned long cur_dblock = 0; | |
2292 | unsigned long newest_mount_id = 9; | |
2293 | struct buffer_head *d_bh; | |
2294 | struct reiserfs_journal_header *jh; | |
2295 | int valid_journal_header = 0; | |
2296 | int replay_count = 0; | |
2297 | int continue_replay = 1; | |
2298 | int ret; | |
2299 | char b[BDEVNAME_SIZE]; | |
2300 | ||
a9dd3643 JM |
2301 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2302 | reiserfs_info(sb, "checking transaction log (%s)\n", | |
bd4c625c LT |
2303 | bdevname(journal->j_dev_bd, b)); |
2304 | start = get_seconds(); | |
2305 | ||
0222e657 JM |
2306 | /* step 1, read in the journal header block. Check the transaction it says |
2307 | ** is the first unflushed, and if that transaction is not valid, | |
bd4c625c LT |
2308 | ** replay is done |
2309 | */ | |
a9dd3643 JM |
2310 | journal->j_header_bh = journal_bread(sb, |
2311 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) | |
2312 | + SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c LT |
2313 | if (!journal->j_header_bh) { |
2314 | return 1; | |
2315 | } | |
2316 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); | |
c499ec24 | 2317 | if (le32_to_cpu(jh->j_first_unflushed_offset) < |
a9dd3643 | 2318 | SB_ONDISK_JOURNAL_SIZE(sb) |
bd4c625c LT |
2319 | && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { |
2320 | oldest_start = | |
a9dd3643 | 2321 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c LT |
2322 | le32_to_cpu(jh->j_first_unflushed_offset); |
2323 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2324 | newest_mount_id = le32_to_cpu(jh->j_mount_id); | |
a9dd3643 | 2325 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2326 | "journal-1153: found in " |
2327 | "header: first_unflushed_offset %d, last_flushed_trans_id " | |
2328 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), | |
2329 | le32_to_cpu(jh->j_last_flush_trans_id)); | |
2330 | valid_journal_header = 1; | |
2331 | ||
0222e657 JM |
2332 | /* now, we try to read the first unflushed offset. If it is not valid, |
2333 | ** there is nothing more we can do, and it makes no sense to read | |
bd4c625c LT |
2334 | ** through the whole log. |
2335 | */ | |
2336 | d_bh = | |
a9dd3643 JM |
2337 | journal_bread(sb, |
2338 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2339 | le32_to_cpu(jh->j_first_unflushed_offset)); |
a9dd3643 | 2340 | ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); |
bd4c625c LT |
2341 | if (!ret) { |
2342 | continue_replay = 0; | |
2343 | } | |
2344 | brelse(d_bh); | |
2345 | goto start_log_replay; | |
2346 | } | |
2347 | ||
bd4c625c LT |
2348 | /* ok, there are transactions that need to be replayed. start with the first log block, find |
2349 | ** all the valid transactions, and pick out the oldest. | |
2350 | */ | |
2351 | while (continue_replay | |
2352 | && cur_dblock < | |
a9dd3643 JM |
2353 | (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
2354 | SB_ONDISK_JOURNAL_SIZE(sb))) { | |
bd4c625c LT |
2355 | /* Note that it is required for blocksize of primary fs device and journal |
2356 | device to be the same */ | |
2357 | d_bh = | |
2358 | reiserfs_breada(journal->j_dev_bd, cur_dblock, | |
a9dd3643 JM |
2359 | sb->s_blocksize, |
2360 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2361 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2362 | ret = |
a9dd3643 | 2363 | journal_transaction_is_valid(sb, d_bh, |
bd4c625c LT |
2364 | &oldest_invalid_trans_id, |
2365 | &newest_mount_id); | |
2366 | if (ret == 1) { | |
2367 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2368 | if (oldest_start == 0) { /* init all oldest_ values */ | |
2369 | oldest_trans_id = get_desc_trans_id(desc); | |
2370 | oldest_start = d_bh->b_blocknr; | |
2371 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2372 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2373 | "journal-1179: Setting " |
2374 | "oldest_start to offset %llu, trans_id %lu", | |
2375 | oldest_start - | |
2376 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2377 | (sb), oldest_trans_id); |
bd4c625c LT |
2378 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { |
2379 | /* one we just read was older */ | |
2380 | oldest_trans_id = get_desc_trans_id(desc); | |
2381 | oldest_start = d_bh->b_blocknr; | |
a9dd3643 | 2382 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2383 | "journal-1180: Resetting " |
2384 | "oldest_start to offset %lu, trans_id %lu", | |
2385 | oldest_start - | |
2386 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2387 | (sb), oldest_trans_id); |
bd4c625c LT |
2388 | } |
2389 | if (newest_mount_id < get_desc_mount_id(desc)) { | |
2390 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2391 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2392 | "journal-1299: Setting " |
2393 | "newest_mount_id to %d", | |
2394 | get_desc_mount_id(desc)); | |
2395 | } | |
2396 | cur_dblock += get_desc_trans_len(desc) + 2; | |
2397 | } else { | |
2398 | cur_dblock++; | |
2399 | } | |
2400 | brelse(d_bh); | |
2401 | } | |
2402 | ||
2403 | start_log_replay: | |
2404 | cur_dblock = oldest_start; | |
2405 | if (oldest_trans_id) { | |
a9dd3643 | 2406 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2407 | "journal-1206: Starting replay " |
2408 | "from offset %llu, trans_id %lu", | |
a9dd3643 | 2409 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2410 | oldest_trans_id); |
2411 | ||
2412 | } | |
2413 | replay_count = 0; | |
2414 | while (continue_replay && oldest_trans_id > 0) { | |
2415 | ret = | |
a9dd3643 | 2416 | journal_read_transaction(sb, cur_dblock, oldest_start, |
bd4c625c LT |
2417 | oldest_trans_id, newest_mount_id); |
2418 | if (ret < 0) { | |
2419 | return ret; | |
2420 | } else if (ret != 0) { | |
2421 | break; | |
2422 | } | |
2423 | cur_dblock = | |
a9dd3643 | 2424 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; |
bd4c625c LT |
2425 | replay_count++; |
2426 | if (cur_dblock == oldest_start) | |
2427 | break; | |
2428 | } | |
2429 | ||
2430 | if (oldest_trans_id == 0) { | |
a9dd3643 | 2431 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2432 | "journal-1225: No valid " "transactions found"); |
2433 | } | |
2434 | /* j_start does not get set correctly if we don't replay any transactions. | |
2435 | ** if we had a valid journal_header, set j_start to the first unflushed transaction value, | |
2436 | ** copy the trans_id from the header | |
2437 | */ | |
2438 | if (valid_journal_header && replay_count == 0) { | |
2439 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); | |
2440 | journal->j_trans_id = | |
2441 | le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
a44c94a7 AZ |
2442 | /* check for trans_id overflow */ |
2443 | if (journal->j_trans_id == 0) | |
2444 | journal->j_trans_id = 10; | |
bd4c625c LT |
2445 | journal->j_last_flush_trans_id = |
2446 | le32_to_cpu(jh->j_last_flush_trans_id); | |
2447 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; | |
2448 | } else { | |
2449 | journal->j_mount_id = newest_mount_id + 1; | |
2450 | } | |
a9dd3643 | 2451 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " |
bd4c625c LT |
2452 | "newest_mount_id to %lu", journal->j_mount_id); |
2453 | journal->j_first_unflushed_offset = journal->j_start; | |
2454 | if (replay_count > 0) { | |
a9dd3643 | 2455 | reiserfs_info(sb, |
bd4c625c LT |
2456 | "replayed %d transactions in %lu seconds\n", |
2457 | replay_count, get_seconds() - start); | |
2458 | } | |
278f6679 JM |
2459 | /* needed to satisfy the locking in _update_journal_header_block */ |
2460 | reiserfs_write_lock(sb); | |
a9dd3643 JM |
2461 | if (!bdev_read_only(sb->s_bdev) && |
2462 | _update_journal_header_block(sb, journal->j_start, | |
bd4c625c | 2463 | journal->j_last_flush_trans_id)) { |
278f6679 | 2464 | reiserfs_write_unlock(sb); |
bd4c625c LT |
2465 | /* replay failed, caller must call free_journal_ram and abort |
2466 | ** the mount | |
2467 | */ | |
2468 | return -1; | |
2469 | } | |
278f6679 | 2470 | reiserfs_write_unlock(sb); |
bd4c625c | 2471 | return 0; |
1da177e4 LT |
2472 | } |
2473 | ||
2474 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) | |
2475 | { | |
bd4c625c | 2476 | struct reiserfs_journal_list *jl; |
8c777cc4 PE |
2477 | jl = kzalloc(sizeof(struct reiserfs_journal_list), |
2478 | GFP_NOFS | __GFP_NOFAIL); | |
bd4c625c LT |
2479 | INIT_LIST_HEAD(&jl->j_list); |
2480 | INIT_LIST_HEAD(&jl->j_working_list); | |
2481 | INIT_LIST_HEAD(&jl->j_tail_bh_list); | |
2482 | INIT_LIST_HEAD(&jl->j_bh_list); | |
90415dea | 2483 | mutex_init(&jl->j_commit_mutex); |
bd4c625c LT |
2484 | SB_JOURNAL(s)->j_num_lists++; |
2485 | get_journal_list(jl); | |
2486 | return jl; | |
2487 | } | |
2488 | ||
a9dd3643 | 2489 | static void journal_list_init(struct super_block *sb) |
bd4c625c | 2490 | { |
a9dd3643 | 2491 | SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
2492 | } |
2493 | ||
4385bab1 | 2494 | static void release_journal_dev(struct super_block *super, |
bd4c625c LT |
2495 | struct reiserfs_journal *journal) |
2496 | { | |
86098fa0 | 2497 | if (journal->j_dev_bd != NULL) { |
4385bab1 | 2498 | blkdev_put(journal->j_dev_bd, journal->j_dev_mode); |
bd4c625c LT |
2499 | journal->j_dev_bd = NULL; |
2500 | } | |
bd4c625c LT |
2501 | } |
2502 | ||
2503 | static int journal_init_dev(struct super_block *super, | |
2504 | struct reiserfs_journal *journal, | |
2505 | const char *jdev_name) | |
1da177e4 LT |
2506 | { |
2507 | int result; | |
2508 | dev_t jdev; | |
e525fd89 | 2509 | fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; |
1da177e4 LT |
2510 | char b[BDEVNAME_SIZE]; |
2511 | ||
2512 | result = 0; | |
2513 | ||
bd4c625c | 2514 | journal->j_dev_bd = NULL; |
bd4c625c LT |
2515 | jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? |
2516 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; | |
1da177e4 LT |
2517 | |
2518 | if (bdev_read_only(super->s_bdev)) | |
bd4c625c | 2519 | blkdev_mode = FMODE_READ; |
1da177e4 LT |
2520 | |
2521 | /* there is no "jdev" option and journal is on separate device */ | |
bd4c625c | 2522 | if ((!jdev_name || !jdev_name[0])) { |
e525fd89 TH |
2523 | if (jdev == super->s_dev) |
2524 | blkdev_mode &= ~FMODE_EXCL; | |
d4d77629 TH |
2525 | journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, |
2526 | journal); | |
e5eb8caa | 2527 | journal->j_dev_mode = blkdev_mode; |
1da177e4 LT |
2528 | if (IS_ERR(journal->j_dev_bd)) { |
2529 | result = PTR_ERR(journal->j_dev_bd); | |
2530 | journal->j_dev_bd = NULL; | |
45b03d5e | 2531 | reiserfs_warning(super, "sh-458", |
bd4c625c LT |
2532 | "cannot init journal device '%s': %i", |
2533 | __bdevname(jdev, b), result); | |
1da177e4 | 2534 | return result; |
e525fd89 | 2535 | } else if (jdev != super->s_dev) |
1da177e4 | 2536 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
86098fa0 | 2537 | |
1da177e4 LT |
2538 | return 0; |
2539 | } | |
2540 | ||
e5eb8caa | 2541 | journal->j_dev_mode = blkdev_mode; |
d4d77629 | 2542 | journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); |
86098fa0 CH |
2543 | if (IS_ERR(journal->j_dev_bd)) { |
2544 | result = PTR_ERR(journal->j_dev_bd); | |
2545 | journal->j_dev_bd = NULL; | |
bd4c625c LT |
2546 | reiserfs_warning(super, |
2547 | "journal_init_dev: Cannot open '%s': %i", | |
2548 | jdev_name, result); | |
86098fa0 | 2549 | return result; |
1da177e4 | 2550 | } |
86098fa0 CH |
2551 | |
2552 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
2553 | reiserfs_info(super, | |
2554 | "journal_init_dev: journal device: %s\n", | |
2555 | bdevname(journal->j_dev_bd, b)); | |
2556 | return 0; | |
1da177e4 LT |
2557 | } |
2558 | ||
cf3d0b81 ES |
2559 | /** |
2560 | * When creating/tuning a file system user can assign some | |
2561 | * journal params within boundaries which depend on the ratio | |
2562 | * blocksize/standard_blocksize. | |
2563 | * | |
2564 | * For blocks >= standard_blocksize transaction size should | |
2565 | * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more | |
2566 | * then JOURNAL_TRANS_MAX_DEFAULT. | |
2567 | * | |
2568 | * For blocks < standard_blocksize these boundaries should be | |
2569 | * decreased proportionally. | |
2570 | */ | |
2571 | #define REISERFS_STANDARD_BLKSIZE (4096) | |
2572 | ||
a9dd3643 | 2573 | static int check_advise_trans_params(struct super_block *sb, |
cf3d0b81 ES |
2574 | struct reiserfs_journal *journal) |
2575 | { | |
2576 | if (journal->j_trans_max) { | |
2577 | /* Non-default journal params. | |
2578 | Do sanity check for them. */ | |
2579 | int ratio = 1; | |
a9dd3643 JM |
2580 | if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) |
2581 | ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; | |
cf3d0b81 ES |
2582 | |
2583 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || | |
2584 | journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || | |
a9dd3643 | 2585 | SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < |
cf3d0b81 | 2586 | JOURNAL_MIN_RATIO) { |
a9dd3643 | 2587 | reiserfs_warning(sb, "sh-462", |
45b03d5e JM |
2588 | "bad transaction max size (%u). " |
2589 | "FSCK?", journal->j_trans_max); | |
cf3d0b81 ES |
2590 | return 1; |
2591 | } | |
2592 | if (journal->j_max_batch != (journal->j_trans_max) * | |
2593 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { | |
a9dd3643 | 2594 | reiserfs_warning(sb, "sh-463", |
45b03d5e JM |
2595 | "bad transaction max batch (%u). " |
2596 | "FSCK?", journal->j_max_batch); | |
cf3d0b81 ES |
2597 | return 1; |
2598 | } | |
2599 | } else { | |
2600 | /* Default journal params. | |
2601 | The file system was created by old version | |
2602 | of mkreiserfs, so some fields contain zeros, | |
2603 | and we need to advise proper values for them */ | |
a9dd3643 JM |
2604 | if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { |
2605 | reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", | |
2606 | sb->s_blocksize); | |
45b03d5e JM |
2607 | return 1; |
2608 | } | |
cf3d0b81 ES |
2609 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; |
2610 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; | |
2611 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; | |
2612 | } | |
2613 | return 0; | |
2614 | } | |
2615 | ||
1da177e4 LT |
2616 | /* |
2617 | ** must be called once on fs mount. calls journal_read for you | |
2618 | */ | |
a9dd3643 | 2619 | int journal_init(struct super_block *sb, const char *j_dev_name, |
bd4c625c LT |
2620 | int old_format, unsigned int commit_max_age) |
2621 | { | |
a9dd3643 | 2622 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; |
bd4c625c LT |
2623 | struct buffer_head *bhjh; |
2624 | struct reiserfs_super_block *rs; | |
2625 | struct reiserfs_journal_header *jh; | |
2626 | struct reiserfs_journal *journal; | |
2627 | struct reiserfs_journal_list *jl; | |
2628 | char b[BDEVNAME_SIZE]; | |
98ea3f50 | 2629 | int ret; |
bd4c625c | 2630 | |
558feb08 | 2631 | journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal)); |
bd4c625c | 2632 | if (!journal) { |
a9dd3643 | 2633 | reiserfs_warning(sb, "journal-1256", |
45b03d5e | 2634 | "unable to get memory for journal structure"); |
bd4c625c LT |
2635 | return 1; |
2636 | } | |
bd4c625c LT |
2637 | INIT_LIST_HEAD(&journal->j_bitmap_nodes); |
2638 | INIT_LIST_HEAD(&journal->j_prealloc_list); | |
2639 | INIT_LIST_HEAD(&journal->j_working_list); | |
2640 | INIT_LIST_HEAD(&journal->j_journal_list); | |
2641 | journal->j_persistent_trans = 0; | |
37c69b98 FW |
2642 | if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, |
2643 | reiserfs_bmap_count(sb))) | |
bd4c625c | 2644 | goto free_and_return; |
98ea3f50 | 2645 | |
a9dd3643 | 2646 | allocate_bitmap_nodes(sb); |
bd4c625c LT |
2647 | |
2648 | /* reserved for journal area support */ | |
a9dd3643 | 2649 | SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? |
bd4c625c | 2650 | REISERFS_OLD_DISK_OFFSET_IN_BYTES |
a9dd3643 JM |
2651 | / sb->s_blocksize + |
2652 | reiserfs_bmap_count(sb) + | |
bd4c625c LT |
2653 | 1 : |
2654 | REISERFS_DISK_OFFSET_IN_BYTES / | |
a9dd3643 | 2655 | sb->s_blocksize + 2); |
bd4c625c | 2656 | |
25985edc | 2657 | /* Sanity check to see is the standard journal fitting within first bitmap |
bd4c625c | 2658 | (actual for small blocksizes) */ |
a9dd3643 JM |
2659 | if (!SB_ONDISK_JOURNAL_DEVICE(sb) && |
2660 | (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + | |
2661 | SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { | |
2662 | reiserfs_warning(sb, "journal-1393", | |
45b03d5e JM |
2663 | "journal does not fit for area addressed " |
2664 | "by first of bitmap blocks. It starts at " | |
bd4c625c | 2665 | "%u and its size is %u. Block size %ld", |
a9dd3643 JM |
2666 | SB_JOURNAL_1st_RESERVED_BLOCK(sb), |
2667 | SB_ONDISK_JOURNAL_SIZE(sb), | |
2668 | sb->s_blocksize); | |
bd4c625c LT |
2669 | goto free_and_return; |
2670 | } | |
2671 | ||
a9dd3643 JM |
2672 | if (journal_init_dev(sb, journal, j_dev_name) != 0) { |
2673 | reiserfs_warning(sb, "sh-462", | |
45b03d5e | 2674 | "unable to initialize jornal device"); |
bd4c625c LT |
2675 | goto free_and_return; |
2676 | } | |
2677 | ||
a9dd3643 | 2678 | rs = SB_DISK_SUPER_BLOCK(sb); |
bd4c625c LT |
2679 | |
2680 | /* read journal header */ | |
a9dd3643 JM |
2681 | bhjh = journal_bread(sb, |
2682 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2683 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2684 | if (!bhjh) { |
a9dd3643 | 2685 | reiserfs_warning(sb, "sh-459", |
45b03d5e | 2686 | "unable to read journal header"); |
bd4c625c LT |
2687 | goto free_and_return; |
2688 | } | |
2689 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); | |
2690 | ||
2691 | /* make sure that journal matches to the super block */ | |
2692 | if (is_reiserfs_jr(rs) | |
2693 | && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != | |
2694 | sb_jp_journal_magic(rs))) { | |
a9dd3643 | 2695 | reiserfs_warning(sb, "sh-460", |
45b03d5e JM |
2696 | "journal header magic %x (device %s) does " |
2697 | "not match to magic found in super block %x", | |
2698 | jh->jh_journal.jp_journal_magic, | |
bd4c625c LT |
2699 | bdevname(journal->j_dev_bd, b), |
2700 | sb_jp_journal_magic(rs)); | |
2701 | brelse(bhjh); | |
2702 | goto free_and_return; | |
2703 | } | |
2704 | ||
2705 | journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); | |
2706 | journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); | |
2707 | journal->j_max_commit_age = | |
2708 | le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); | |
2709 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
2710 | ||
a9dd3643 | 2711 | if (check_advise_trans_params(sb, journal) != 0) |
cf3d0b81 | 2712 | goto free_and_return; |
bd4c625c LT |
2713 | journal->j_default_max_commit_age = journal->j_max_commit_age; |
2714 | ||
2715 | if (commit_max_age != 0) { | |
2716 | journal->j_max_commit_age = commit_max_age; | |
2717 | journal->j_max_trans_age = commit_max_age; | |
2718 | } | |
2719 | ||
a9dd3643 | 2720 | reiserfs_info(sb, "journal params: device %s, size %u, " |
bd4c625c LT |
2721 | "journal first block %u, max trans len %u, max batch %u, " |
2722 | "max commit age %u, max trans age %u\n", | |
2723 | bdevname(journal->j_dev_bd, b), | |
a9dd3643 JM |
2724 | SB_ONDISK_JOURNAL_SIZE(sb), |
2725 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), | |
bd4c625c LT |
2726 | journal->j_trans_max, |
2727 | journal->j_max_batch, | |
2728 | journal->j_max_commit_age, journal->j_max_trans_age); | |
2729 | ||
2730 | brelse(bhjh); | |
2731 | ||
2732 | journal->j_list_bitmap_index = 0; | |
a9dd3643 | 2733 | journal_list_init(sb); |
bd4c625c LT |
2734 | |
2735 | memset(journal->j_list_hash_table, 0, | |
2736 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
2737 | ||
2738 | INIT_LIST_HEAD(&journal->j_dirty_buffers); | |
2739 | spin_lock_init(&journal->j_dirty_buffers_lock); | |
2740 | ||
2741 | journal->j_start = 0; | |
2742 | journal->j_len = 0; | |
2743 | journal->j_len_alloc = 0; | |
2744 | atomic_set(&(journal->j_wcount), 0); | |
2745 | atomic_set(&(journal->j_async_throttle), 0); | |
2746 | journal->j_bcount = 0; | |
2747 | journal->j_trans_start_time = 0; | |
2748 | journal->j_last = NULL; | |
2749 | journal->j_first = NULL; | |
2750 | init_waitqueue_head(&(journal->j_join_wait)); | |
f68215c4 | 2751 | mutex_init(&journal->j_mutex); |
afe70259 | 2752 | mutex_init(&journal->j_flush_mutex); |
bd4c625c LT |
2753 | |
2754 | journal->j_trans_id = 10; | |
2755 | journal->j_mount_id = 10; | |
2756 | journal->j_state = 0; | |
2757 | atomic_set(&(journal->j_jlock), 0); | |
2758 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes); | |
2759 | journal->j_cnode_free_orig = journal->j_cnode_free_list; | |
2760 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; | |
2761 | journal->j_cnode_used = 0; | |
2762 | journal->j_must_wait = 0; | |
2763 | ||
576f6d79 | 2764 | if (journal->j_cnode_free == 0) { |
a9dd3643 | 2765 | reiserfs_warning(sb, "journal-2004", "Journal cnode memory " |
576f6d79 JM |
2766 | "allocation failed (%ld bytes). Journal is " |
2767 | "too large for available memory. Usually " | |
2768 | "this is due to a journal that is too large.", | |
2769 | sizeof (struct reiserfs_journal_cnode) * num_cnodes); | |
2770 | goto free_and_return; | |
2771 | } | |
2772 | ||
a9dd3643 | 2773 | init_journal_hash(sb); |
bd4c625c | 2774 | jl = journal->j_current_jl; |
37c69b98 FW |
2775 | |
2776 | /* | |
2777 | * get_list_bitmap() may call flush_commit_list() which | |
2778 | * requires the lock. Calling flush_commit_list() shouldn't happen | |
2779 | * this early but I like to be paranoid. | |
2780 | */ | |
2781 | reiserfs_write_lock(sb); | |
a9dd3643 | 2782 | jl->j_list_bitmap = get_list_bitmap(sb, jl); |
37c69b98 | 2783 | reiserfs_write_unlock(sb); |
bd4c625c | 2784 | if (!jl->j_list_bitmap) { |
a9dd3643 | 2785 | reiserfs_warning(sb, "journal-2005", |
45b03d5e | 2786 | "get_list_bitmap failed for journal list 0"); |
bd4c625c LT |
2787 | goto free_and_return; |
2788 | } | |
37c69b98 | 2789 | |
37c69b98 | 2790 | ret = journal_read(sb); |
37c69b98 | 2791 | if (ret < 0) { |
a9dd3643 | 2792 | reiserfs_warning(sb, "reiserfs-2006", |
45b03d5e | 2793 | "Replay Failure, unable to mount"); |
bd4c625c LT |
2794 | goto free_and_return; |
2795 | } | |
2796 | ||
c4028958 | 2797 | INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); |
a9dd3643 | 2798 | journal->j_work_sb = sb; |
bd4c625c LT |
2799 | return 0; |
2800 | free_and_return: | |
a9dd3643 | 2801 | free_journal_ram(sb); |
bd4c625c | 2802 | return 1; |
1da177e4 LT |
2803 | } |
2804 | ||
2805 | /* | |
2806 | ** test for a polite end of the current transaction. Used by file_write, and should | |
2807 | ** be used by delete to make sure they don't write more than can fit inside a single | |
2808 | ** transaction | |
2809 | */ | |
bd4c625c LT |
2810 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, |
2811 | int new_alloc) | |
2812 | { | |
2813 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2814 | time_t now = get_seconds(); | |
2815 | /* cannot restart while nested */ | |
2816 | BUG_ON(!th->t_trans_id); | |
2817 | if (th->t_refcount > 1) | |
2818 | return 0; | |
2819 | if (journal->j_must_wait > 0 || | |
2820 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || | |
2821 | atomic_read(&(journal->j_jlock)) || | |
2822 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || | |
2823 | journal->j_cnode_free < (journal->j_trans_max * 3)) { | |
2824 | return 1; | |
2825 | } | |
b18c1c6e | 2826 | |
6ae1ea44 CM |
2827 | journal->j_len_alloc += new_alloc; |
2828 | th->t_blocks_allocated += new_alloc ; | |
bd4c625c | 2829 | return 0; |
1da177e4 LT |
2830 | } |
2831 | ||
b18c1c6e | 2832 | /* this must be called inside a transaction |
1da177e4 | 2833 | */ |
bd4c625c LT |
2834 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) |
2835 | { | |
2836 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2837 | BUG_ON(!th->t_trans_id); | |
2838 | journal->j_must_wait = 1; | |
2839 | set_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2840 | return; | |
1da177e4 LT |
2841 | } |
2842 | ||
b18c1c6e | 2843 | /* this must be called without a transaction started |
1da177e4 | 2844 | */ |
bd4c625c LT |
2845 | void reiserfs_allow_writes(struct super_block *s) |
2846 | { | |
2847 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2848 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2849 | wake_up(&journal->j_join_wait); | |
1da177e4 LT |
2850 | } |
2851 | ||
b18c1c6e | 2852 | /* this must be called without a transaction started |
1da177e4 | 2853 | */ |
bd4c625c LT |
2854 | void reiserfs_wait_on_write_block(struct super_block *s) |
2855 | { | |
2856 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2857 | wait_event(journal->j_join_wait, | |
2858 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); | |
2859 | } | |
2860 | ||
2861 | static void queue_log_writer(struct super_block *s) | |
2862 | { | |
2863 | wait_queue_t wait; | |
2864 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2865 | set_bit(J_WRITERS_QUEUED, &journal->j_state); | |
2866 | ||
2867 | /* | |
2868 | * we don't want to use wait_event here because | |
2869 | * we only want to wait once. | |
2870 | */ | |
2871 | init_waitqueue_entry(&wait, current); | |
2872 | add_wait_queue(&journal->j_join_wait, &wait); | |
1da177e4 | 2873 | set_current_state(TASK_UNINTERRUPTIBLE); |
8ebc4232 | 2874 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { |
278f6679 | 2875 | int depth = reiserfs_write_unlock_nested(s); |
bd4c625c | 2876 | schedule(); |
278f6679 | 2877 | reiserfs_write_lock_nested(s, depth); |
8ebc4232 | 2878 | } |
5ab2f7e0 | 2879 | __set_current_state(TASK_RUNNING); |
bd4c625c LT |
2880 | remove_wait_queue(&journal->j_join_wait, &wait); |
2881 | } | |
2882 | ||
2883 | static void wake_queued_writers(struct super_block *s) | |
2884 | { | |
2885 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2886 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2887 | wake_up(&journal->j_join_wait); | |
2888 | } | |
2889 | ||
600ed416 | 2890 | static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) |
bd4c625c LT |
2891 | { |
2892 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
2893 | unsigned long bcount = journal->j_bcount; | |
2894 | while (1) { | |
278f6679 JM |
2895 | int depth; |
2896 | ||
2897 | depth = reiserfs_write_unlock_nested(sb); | |
041e0e3b | 2898 | schedule_timeout_uninterruptible(1); |
278f6679 JM |
2899 | reiserfs_write_lock_nested(sb, depth); |
2900 | ||
bd4c625c LT |
2901 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; |
2902 | while ((atomic_read(&journal->j_wcount) > 0 || | |
2903 | atomic_read(&journal->j_jlock)) && | |
2904 | journal->j_trans_id == trans_id) { | |
2905 | queue_log_writer(sb); | |
2906 | } | |
2907 | if (journal->j_trans_id != trans_id) | |
2908 | break; | |
2909 | if (bcount == journal->j_bcount) | |
2910 | break; | |
2911 | bcount = journal->j_bcount; | |
1da177e4 | 2912 | } |
1da177e4 LT |
2913 | } |
2914 | ||
2915 | /* join == true if you must join an existing transaction. | |
2916 | ** join == false if you can deal with waiting for others to finish | |
2917 | ** | |
2918 | ** this will block until the transaction is joinable. send the number of blocks you | |
2919 | ** expect to use in nblocks. | |
2920 | */ | |
bd4c625c | 2921 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
a9dd3643 | 2922 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
2923 | int join) |
2924 | { | |
2925 | time_t now = get_seconds(); | |
600ed416 | 2926 | unsigned int old_trans_id; |
a9dd3643 | 2927 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
2928 | struct reiserfs_transaction_handle myth; |
2929 | int sched_count = 0; | |
2930 | int retval; | |
278f6679 | 2931 | int depth; |
bd4c625c | 2932 | |
a9dd3643 | 2933 | reiserfs_check_lock_depth(sb, "journal_begin"); |
14a61442 | 2934 | BUG_ON(nblocks > journal->j_trans_max); |
bd4c625c | 2935 | |
a9dd3643 | 2936 | PROC_INFO_INC(sb, journal.journal_being); |
bd4c625c LT |
2937 | /* set here for journal_join */ |
2938 | th->t_refcount = 1; | |
a9dd3643 | 2939 | th->t_super = sb; |
bd4c625c LT |
2940 | |
2941 | relock: | |
a9dd3643 | 2942 | lock_journal(sb); |
bd4c625c | 2943 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { |
a9dd3643 | 2944 | unlock_journal(sb); |
bd4c625c LT |
2945 | retval = journal->j_errno; |
2946 | goto out_fail; | |
2947 | } | |
2948 | journal->j_bcount++; | |
2949 | ||
2950 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { | |
a9dd3643 | 2951 | unlock_journal(sb); |
278f6679 | 2952 | depth = reiserfs_write_unlock_nested(sb); |
a9dd3643 | 2953 | reiserfs_wait_on_write_block(sb); |
278f6679 | 2954 | reiserfs_write_lock_nested(sb, depth); |
a9dd3643 | 2955 | PROC_INFO_INC(sb, journal.journal_relock_writers); |
bd4c625c LT |
2956 | goto relock; |
2957 | } | |
2958 | now = get_seconds(); | |
2959 | ||
2960 | /* if there is no room in the journal OR | |
0222e657 | 2961 | ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning |
bd4c625c LT |
2962 | ** we don't sleep if there aren't other writers |
2963 | */ | |
2964 | ||
2965 | if ((!join && journal->j_must_wait > 0) || | |
2966 | (!join | |
2967 | && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) | |
2968 | || (!join && atomic_read(&journal->j_wcount) > 0 | |
2969 | && journal->j_trans_start_time > 0 | |
2970 | && (now - journal->j_trans_start_time) > | |
2971 | journal->j_max_trans_age) || (!join | |
2972 | && atomic_read(&journal->j_jlock)) | |
2973 | || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { | |
2974 | ||
2975 | old_trans_id = journal->j_trans_id; | |
a9dd3643 | 2976 | unlock_journal(sb); /* allow others to finish this transaction */ |
bd4c625c LT |
2977 | |
2978 | if (!join && (journal->j_len_alloc + nblocks + 2) >= | |
2979 | journal->j_max_batch && | |
2980 | ((journal->j_len + nblocks + 2) * 100) < | |
2981 | (journal->j_len_alloc * 75)) { | |
2982 | if (atomic_read(&journal->j_wcount) > 10) { | |
2983 | sched_count++; | |
a9dd3643 | 2984 | queue_log_writer(sb); |
bd4c625c LT |
2985 | goto relock; |
2986 | } | |
2987 | } | |
2988 | /* don't mess with joining the transaction if all we have to do is | |
2989 | * wait for someone else to do a commit | |
2990 | */ | |
2991 | if (atomic_read(&journal->j_jlock)) { | |
2992 | while (journal->j_trans_id == old_trans_id && | |
2993 | atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 2994 | queue_log_writer(sb); |
bd4c625c LT |
2995 | } |
2996 | goto relock; | |
2997 | } | |
a9dd3643 | 2998 | retval = journal_join(&myth, sb, 1); |
bd4c625c LT |
2999 | if (retval) |
3000 | goto out_fail; | |
3001 | ||
3002 | /* someone might have ended the transaction while we joined */ | |
3003 | if (old_trans_id != journal->j_trans_id) { | |
a9dd3643 | 3004 | retval = do_journal_end(&myth, sb, 1, 0); |
bd4c625c | 3005 | } else { |
a9dd3643 | 3006 | retval = do_journal_end(&myth, sb, 1, COMMIT_NOW); |
bd4c625c LT |
3007 | } |
3008 | ||
3009 | if (retval) | |
3010 | goto out_fail; | |
3011 | ||
a9dd3643 | 3012 | PROC_INFO_INC(sb, journal.journal_relock_wcount); |
bd4c625c LT |
3013 | goto relock; |
3014 | } | |
3015 | /* we are the first writer, set trans_id */ | |
3016 | if (journal->j_trans_start_time == 0) { | |
3017 | journal->j_trans_start_time = get_seconds(); | |
3018 | } | |
3019 | atomic_inc(&(journal->j_wcount)); | |
3020 | journal->j_len_alloc += nblocks; | |
3021 | th->t_blocks_logged = 0; | |
3022 | th->t_blocks_allocated = nblocks; | |
3023 | th->t_trans_id = journal->j_trans_id; | |
a9dd3643 | 3024 | unlock_journal(sb); |
bd4c625c | 3025 | INIT_LIST_HEAD(&th->t_list); |
bd4c625c LT |
3026 | return 0; |
3027 | ||
3028 | out_fail: | |
3029 | memset(th, 0, sizeof(*th)); | |
3030 | /* Re-set th->t_super, so we can properly keep track of how many | |
3031 | * persistent transactions there are. We need to do this so if this | |
3032 | * call is part of a failed restart_transaction, we can free it later */ | |
a9dd3643 | 3033 | th->t_super = sb; |
bd4c625c LT |
3034 | return retval; |
3035 | } | |
3036 | ||
3037 | struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct | |
3038 | super_block | |
3039 | *s, | |
3040 | int nblocks) | |
3041 | { | |
3042 | int ret; | |
3043 | struct reiserfs_transaction_handle *th; | |
3044 | ||
3045 | /* if we're nesting into an existing transaction. It will be | |
3046 | ** persistent on its own | |
3047 | */ | |
3048 | if (reiserfs_transaction_running(s)) { | |
3049 | th = current->journal_info; | |
3050 | th->t_refcount++; | |
14a61442 ES |
3051 | BUG_ON(th->t_refcount < 2); |
3052 | ||
bd4c625c LT |
3053 | return th; |
3054 | } | |
d739b42b | 3055 | th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); |
bd4c625c LT |
3056 | if (!th) |
3057 | return NULL; | |
3058 | ret = journal_begin(th, s, nblocks); | |
3059 | if (ret) { | |
d739b42b | 3060 | kfree(th); |
bd4c625c LT |
3061 | return NULL; |
3062 | } | |
3063 | ||
3064 | SB_JOURNAL(s)->j_persistent_trans++; | |
3065 | return th; | |
3066 | } | |
3067 | ||
3068 | int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) | |
3069 | { | |
3070 | struct super_block *s = th->t_super; | |
3071 | int ret = 0; | |
3072 | if (th->t_trans_id) | |
3073 | ret = journal_end(th, th->t_super, th->t_blocks_allocated); | |
3074 | else | |
3075 | ret = -EIO; | |
3076 | if (th->t_refcount == 0) { | |
3077 | SB_JOURNAL(s)->j_persistent_trans--; | |
d739b42b | 3078 | kfree(th); |
bd4c625c LT |
3079 | } |
3080 | return ret; | |
3081 | } | |
3082 | ||
3083 | static int journal_join(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3084 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3085 | { |
3086 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3087 | ||
3088 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
3089 | ** pointer | |
3090 | */ | |
3091 | th->t_handle_save = cur_th; | |
14a61442 | 3092 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
a9dd3643 | 3093 | return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN); |
bd4c625c LT |
3094 | } |
3095 | ||
3096 | int journal_join_abort(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3097 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3098 | { |
3099 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3100 | ||
3101 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
3102 | ** pointer | |
3103 | */ | |
3104 | th->t_handle_save = cur_th; | |
14a61442 | 3105 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
a9dd3643 | 3106 | return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT); |
bd4c625c LT |
3107 | } |
3108 | ||
3109 | int journal_begin(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3110 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3111 | { |
3112 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3113 | int ret; | |
3114 | ||
3115 | th->t_handle_save = NULL; | |
3116 | if (cur_th) { | |
3117 | /* we are nesting into the current transaction */ | |
a9dd3643 | 3118 | if (cur_th->t_super == sb) { |
bd4c625c LT |
3119 | BUG_ON(!cur_th->t_refcount); |
3120 | cur_th->t_refcount++; | |
3121 | memcpy(th, cur_th, sizeof(*th)); | |
3122 | if (th->t_refcount <= 1) | |
a9dd3643 | 3123 | reiserfs_warning(sb, "reiserfs-2005", |
45b03d5e JM |
3124 | "BAD: refcount <= 1, but " |
3125 | "journal_info != 0"); | |
bd4c625c LT |
3126 | return 0; |
3127 | } else { | |
3128 | /* we've ended up with a handle from a different filesystem. | |
3129 | ** save it and restore on journal_end. This should never | |
3130 | ** really happen... | |
3131 | */ | |
a9dd3643 | 3132 | reiserfs_warning(sb, "clm-2100", |
45b03d5e | 3133 | "nesting info a different FS"); |
bd4c625c LT |
3134 | th->t_handle_save = current->journal_info; |
3135 | current->journal_info = th; | |
3136 | } | |
1da177e4 | 3137 | } else { |
bd4c625c LT |
3138 | current->journal_info = th; |
3139 | } | |
a9dd3643 | 3140 | ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); |
14a61442 | 3141 | BUG_ON(current->journal_info != th); |
1da177e4 | 3142 | |
bd4c625c LT |
3143 | /* I guess this boils down to being the reciprocal of clm-2100 above. |
3144 | * If do_journal_begin_r fails, we need to put it back, since journal_end | |
3145 | * won't be called to do it. */ | |
3146 | if (ret) | |
3147 | current->journal_info = th->t_handle_save; | |
3148 | else | |
3149 | BUG_ON(!th->t_refcount); | |
1da177e4 | 3150 | |
bd4c625c | 3151 | return ret; |
1da177e4 LT |
3152 | } |
3153 | ||
3154 | /* | |
3155 | ** puts bh into the current transaction. If it was already there, reorders removes the | |
3156 | ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). | |
3157 | ** | |
3158 | ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the | |
3159 | ** transaction is committed. | |
0222e657 | 3160 | ** |
1da177e4 LT |
3161 | ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. |
3162 | */ | |
bd4c625c | 3163 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3164 | struct super_block *sb, struct buffer_head *bh) |
bd4c625c | 3165 | { |
a9dd3643 | 3166 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3167 | struct reiserfs_journal_cnode *cn = NULL; |
3168 | int count_already_incd = 0; | |
3169 | int prepared = 0; | |
3170 | BUG_ON(!th->t_trans_id); | |
3171 | ||
a9dd3643 | 3172 | PROC_INFO_INC(sb, journal.mark_dirty); |
bd4c625c | 3173 | if (th->t_trans_id != journal->j_trans_id) { |
c3a9c210 JM |
3174 | reiserfs_panic(th->t_super, "journal-1577", |
3175 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3176 | th->t_trans_id, journal->j_trans_id); |
3177 | } | |
3178 | ||
bd4c625c LT |
3179 | prepared = test_clear_buffer_journal_prepared(bh); |
3180 | clear_buffer_journal_restore_dirty(bh); | |
3181 | /* already in this transaction, we are done */ | |
3182 | if (buffer_journaled(bh)) { | |
a9dd3643 | 3183 | PROC_INFO_INC(sb, journal.mark_dirty_already); |
bd4c625c LT |
3184 | return 0; |
3185 | } | |
3186 | ||
3187 | /* this must be turned into a panic instead of a warning. We can't allow | |
3188 | ** a dirty or journal_dirty or locked buffer to be logged, as some changes | |
3189 | ** could get to disk too early. NOT GOOD. | |
3190 | */ | |
3191 | if (!prepared || buffer_dirty(bh)) { | |
a9dd3643 | 3192 | reiserfs_warning(sb, "journal-1777", |
45b03d5e | 3193 | "buffer %llu bad state " |
bd4c625c LT |
3194 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", |
3195 | (unsigned long long)bh->b_blocknr, | |
3196 | prepared ? ' ' : '!', | |
3197 | buffer_locked(bh) ? ' ' : '!', | |
3198 | buffer_dirty(bh) ? ' ' : '!', | |
3199 | buffer_journal_dirty(bh) ? ' ' : '!'); | |
3200 | } | |
3201 | ||
3202 | if (atomic_read(&(journal->j_wcount)) <= 0) { | |
a9dd3643 | 3203 | reiserfs_warning(sb, "journal-1409", |
45b03d5e | 3204 | "returning because j_wcount was %d", |
bd4c625c LT |
3205 | atomic_read(&(journal->j_wcount))); |
3206 | return 1; | |
3207 | } | |
0222e657 | 3208 | /* this error means I've screwed up, and we've overflowed the transaction. |
bd4c625c LT |
3209 | ** Nothing can be done here, except make the FS readonly or panic. |
3210 | */ | |
3211 | if (journal->j_len >= journal->j_trans_max) { | |
c3a9c210 JM |
3212 | reiserfs_panic(th->t_super, "journal-1413", |
3213 | "j_len (%lu) is too big", | |
bd4c625c LT |
3214 | journal->j_len); |
3215 | } | |
3216 | ||
3217 | if (buffer_journal_dirty(bh)) { | |
3218 | count_already_incd = 1; | |
a9dd3643 | 3219 | PROC_INFO_INC(sb, journal.mark_dirty_notjournal); |
bd4c625c LT |
3220 | clear_buffer_journal_dirty(bh); |
3221 | } | |
3222 | ||
3223 | if (journal->j_len > journal->j_len_alloc) { | |
3224 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; | |
3225 | } | |
3226 | ||
3227 | set_buffer_journaled(bh); | |
3228 | ||
3229 | /* now put this guy on the end */ | |
3230 | if (!cn) { | |
a9dd3643 | 3231 | cn = get_cnode(sb); |
bd4c625c | 3232 | if (!cn) { |
a9dd3643 | 3233 | reiserfs_panic(sb, "journal-4", "get_cnode failed!"); |
bd4c625c LT |
3234 | } |
3235 | ||
3236 | if (th->t_blocks_logged == th->t_blocks_allocated) { | |
3237 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; | |
3238 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; | |
3239 | } | |
3240 | th->t_blocks_logged++; | |
3241 | journal->j_len++; | |
3242 | ||
3243 | cn->bh = bh; | |
3244 | cn->blocknr = bh->b_blocknr; | |
a9dd3643 | 3245 | cn->sb = sb; |
bd4c625c LT |
3246 | cn->jlist = NULL; |
3247 | insert_journal_hash(journal->j_hash_table, cn); | |
3248 | if (!count_already_incd) { | |
3249 | get_bh(bh); | |
3250 | } | |
3251 | } | |
3252 | cn->next = NULL; | |
3253 | cn->prev = journal->j_last; | |
3254 | cn->bh = bh; | |
3255 | if (journal->j_last) { | |
3256 | journal->j_last->next = cn; | |
3257 | journal->j_last = cn; | |
3258 | } else { | |
3259 | journal->j_first = cn; | |
3260 | journal->j_last = cn; | |
3261 | } | |
033369d1 | 3262 | reiserfs_schedule_old_flush(sb); |
bd4c625c LT |
3263 | return 0; |
3264 | } | |
3265 | ||
3266 | int journal_end(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3267 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3268 | { |
3269 | if (!current->journal_info && th->t_refcount > 1) | |
a9dd3643 | 3270 | reiserfs_warning(sb, "REISER-NESTING", |
45b03d5e | 3271 | "th NULL, refcount %d", th->t_refcount); |
bd4c625c LT |
3272 | |
3273 | if (!th->t_trans_id) { | |
3274 | WARN_ON(1); | |
3275 | return -EIO; | |
3276 | } | |
3277 | ||
3278 | th->t_refcount--; | |
3279 | if (th->t_refcount > 0) { | |
3280 | struct reiserfs_transaction_handle *cur_th = | |
3281 | current->journal_info; | |
3282 | ||
3283 | /* we aren't allowed to close a nested transaction on a different | |
3284 | ** filesystem from the one in the task struct | |
3285 | */ | |
14a61442 | 3286 | BUG_ON(cur_th->t_super != th->t_super); |
bd4c625c LT |
3287 | |
3288 | if (th != cur_th) { | |
3289 | memcpy(current->journal_info, th, sizeof(*th)); | |
3290 | th->t_trans_id = 0; | |
3291 | } | |
3292 | return 0; | |
3293 | } else { | |
a9dd3643 | 3294 | return do_journal_end(th, sb, nblocks, 0); |
bd4c625c | 3295 | } |
1da177e4 LT |
3296 | } |
3297 | ||
0222e657 | 3298 | /* removes from the current transaction, relsing and descrementing any counters. |
1da177e4 LT |
3299 | ** also files the removed buffer directly onto the clean list |
3300 | ** | |
3301 | ** called by journal_mark_freed when a block has been deleted | |
3302 | ** | |
3303 | ** returns 1 if it cleaned and relsed the buffer. 0 otherwise | |
3304 | */ | |
a9dd3643 | 3305 | static int remove_from_transaction(struct super_block *sb, |
bd4c625c LT |
3306 | b_blocknr_t blocknr, int already_cleaned) |
3307 | { | |
3308 | struct buffer_head *bh; | |
3309 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3310 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3311 | int ret = 0; |
3312 | ||
a9dd3643 | 3313 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3314 | if (!cn || !cn->bh) { |
3315 | return ret; | |
3316 | } | |
3317 | bh = cn->bh; | |
3318 | if (cn->prev) { | |
3319 | cn->prev->next = cn->next; | |
3320 | } | |
3321 | if (cn->next) { | |
3322 | cn->next->prev = cn->prev; | |
3323 | } | |
3324 | if (cn == journal->j_first) { | |
3325 | journal->j_first = cn->next; | |
3326 | } | |
3327 | if (cn == journal->j_last) { | |
3328 | journal->j_last = cn->prev; | |
3329 | } | |
3330 | if (bh) | |
a9dd3643 | 3331 | remove_journal_hash(sb, journal->j_hash_table, NULL, |
bd4c625c LT |
3332 | bh->b_blocknr, 0); |
3333 | clear_buffer_journaled(bh); /* don't log this one */ | |
3334 | ||
3335 | if (!already_cleaned) { | |
3336 | clear_buffer_journal_dirty(bh); | |
3337 | clear_buffer_dirty(bh); | |
3338 | clear_buffer_journal_test(bh); | |
3339 | put_bh(bh); | |
3340 | if (atomic_read(&(bh->b_count)) < 0) { | |
a9dd3643 | 3341 | reiserfs_warning(sb, "journal-1752", |
45b03d5e | 3342 | "b_count < 0"); |
bd4c625c LT |
3343 | } |
3344 | ret = 1; | |
3345 | } | |
3346 | journal->j_len--; | |
3347 | journal->j_len_alloc--; | |
a9dd3643 | 3348 | free_cnode(sb, cn); |
bd4c625c | 3349 | return ret; |
1da177e4 LT |
3350 | } |
3351 | ||
3352 | /* | |
3353 | ** for any cnode in a journal list, it can only be dirtied of all the | |
0779bf2d | 3354 | ** transactions that include it are committed to disk. |
1da177e4 LT |
3355 | ** this checks through each transaction, and returns 1 if you are allowed to dirty, |
3356 | ** and 0 if you aren't | |
3357 | ** | |
3358 | ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log | |
3359 | ** blocks for a given transaction on disk | |
3360 | ** | |
3361 | */ | |
bd4c625c LT |
3362 | static int can_dirty(struct reiserfs_journal_cnode *cn) |
3363 | { | |
3364 | struct super_block *sb = cn->sb; | |
3365 | b_blocknr_t blocknr = cn->blocknr; | |
3366 | struct reiserfs_journal_cnode *cur = cn->hprev; | |
3367 | int can_dirty = 1; | |
3368 | ||
3369 | /* first test hprev. These are all newer than cn, so any node here | |
3370 | ** with the same block number and dev means this node can't be sent | |
3371 | ** to disk right now. | |
3372 | */ | |
3373 | while (cur && can_dirty) { | |
3374 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && | |
3375 | cur->blocknr == blocknr) { | |
3376 | can_dirty = 0; | |
3377 | } | |
3378 | cur = cur->hprev; | |
3379 | } | |
3380 | /* then test hnext. These are all older than cn. As long as they | |
3381 | ** are committed to the log, it is safe to write cn to disk | |
3382 | */ | |
3383 | cur = cn->hnext; | |
3384 | while (cur && can_dirty) { | |
3385 | if (cur->jlist && cur->jlist->j_len > 0 && | |
3386 | atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && | |
3387 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { | |
3388 | can_dirty = 0; | |
3389 | } | |
3390 | cur = cur->hnext; | |
3391 | } | |
3392 | return can_dirty; | |
1da177e4 LT |
3393 | } |
3394 | ||
3395 | /* syncs the commit blocks, but does not force the real buffers to disk | |
0222e657 | 3396 | ** will wait until the current transaction is done/committed before returning |
1da177e4 | 3397 | */ |
bd4c625c | 3398 | int journal_end_sync(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3399 | struct super_block *sb, unsigned long nblocks) |
bd4c625c | 3400 | { |
a9dd3643 | 3401 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 3402 | |
bd4c625c LT |
3403 | BUG_ON(!th->t_trans_id); |
3404 | /* you can sync while nested, very, very bad */ | |
14a61442 | 3405 | BUG_ON(th->t_refcount > 1); |
bd4c625c | 3406 | if (journal->j_len == 0) { |
a9dd3643 | 3407 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3408 | 1); |
a9dd3643 | 3409 | journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3410 | } |
a9dd3643 | 3411 | return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT); |
1da177e4 LT |
3412 | } |
3413 | ||
3414 | /* | |
3415 | ** writeback the pending async commits to disk | |
3416 | */ | |
c4028958 | 3417 | static void flush_async_commits(struct work_struct *work) |
bd4c625c | 3418 | { |
c4028958 DH |
3419 | struct reiserfs_journal *journal = |
3420 | container_of(work, struct reiserfs_journal, j_work.work); | |
a9dd3643 | 3421 | struct super_block *sb = journal->j_work_sb; |
bd4c625c LT |
3422 | struct reiserfs_journal_list *jl; |
3423 | struct list_head *entry; | |
3424 | ||
8ebc4232 | 3425 | reiserfs_write_lock(sb); |
bd4c625c LT |
3426 | if (!list_empty(&journal->j_journal_list)) { |
3427 | /* last entry is the youngest, commit it and you get everything */ | |
3428 | entry = journal->j_journal_list.prev; | |
3429 | jl = JOURNAL_LIST_ENTRY(entry); | |
a9dd3643 | 3430 | flush_commit_list(sb, jl, 1); |
bd4c625c | 3431 | } |
8ebc4232 | 3432 | reiserfs_write_unlock(sb); |
1da177e4 LT |
3433 | } |
3434 | ||
3435 | /* | |
3436 | ** flushes any old transactions to disk | |
3437 | ** ends the current transaction if it is too old | |
3438 | */ | |
25729b0e | 3439 | void reiserfs_flush_old_commits(struct super_block *sb) |
bd4c625c LT |
3440 | { |
3441 | time_t now; | |
3442 | struct reiserfs_transaction_handle th; | |
a9dd3643 | 3443 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3444 | |
3445 | now = get_seconds(); | |
3446 | /* safety check so we don't flush while we are replaying the log during | |
3447 | * mount | |
3448 | */ | |
25729b0e AB |
3449 | if (list_empty(&journal->j_journal_list)) |
3450 | return; | |
bd4c625c LT |
3451 | |
3452 | /* check the current transaction. If there are no writers, and it is | |
3453 | * too old, finish it, and force the commit blocks to disk | |
3454 | */ | |
3455 | if (atomic_read(&journal->j_wcount) <= 0 && | |
3456 | journal->j_trans_start_time > 0 && | |
3457 | journal->j_len > 0 && | |
3458 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
a9dd3643 JM |
3459 | if (!journal_join(&th, sb, 1)) { |
3460 | reiserfs_prepare_for_journal(sb, | |
3461 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 3462 | 1); |
a9dd3643 JM |
3463 | journal_mark_dirty(&th, sb, |
3464 | SB_BUFFER_WITH_SB(sb)); | |
bd4c625c LT |
3465 | |
3466 | /* we're only being called from kreiserfsd, it makes no sense to do | |
3467 | ** an async commit so that kreiserfsd can do it later | |
3468 | */ | |
a9dd3643 | 3469 | do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT); |
bd4c625c LT |
3470 | } |
3471 | } | |
1da177e4 LT |
3472 | } |
3473 | ||
3474 | /* | |
3475 | ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit | |
0222e657 JM |
3476 | ** |
3477 | ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all | |
1da177e4 LT |
3478 | ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just |
3479 | ** flushes the commit list and returns 0. | |
3480 | ** | |
3481 | ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. | |
0222e657 | 3482 | ** |
1da177e4 LT |
3483 | ** Note, we can't allow the journal_end to proceed while there are still writers in the log. |
3484 | */ | |
bd4c625c | 3485 | static int check_journal_end(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3486 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3487 | int flags) |
3488 | { | |
3489 | ||
3490 | time_t now; | |
3491 | int flush = flags & FLUSH_ALL; | |
3492 | int commit_now = flags & COMMIT_NOW; | |
3493 | int wait_on_commit = flags & WAIT; | |
3494 | struct reiserfs_journal_list *jl; | |
a9dd3643 | 3495 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3496 | |
3497 | BUG_ON(!th->t_trans_id); | |
3498 | ||
3499 | if (th->t_trans_id != journal->j_trans_id) { | |
c3a9c210 JM |
3500 | reiserfs_panic(th->t_super, "journal-1577", |
3501 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3502 | th->t_trans_id, journal->j_trans_id); |
3503 | } | |
3504 | ||
3505 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); | |
3506 | if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ | |
3507 | atomic_dec(&(journal->j_wcount)); | |
3508 | } | |
3509 | ||
0222e657 | 3510 | /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released |
bd4c625c LT |
3511 | ** will be dealt with by next transaction that actually writes something, but should be taken |
3512 | ** care of in this trans | |
3513 | */ | |
14a61442 ES |
3514 | BUG_ON(journal->j_len == 0); |
3515 | ||
bd4c625c LT |
3516 | /* if wcount > 0, and we are called to with flush or commit_now, |
3517 | ** we wait on j_join_wait. We will wake up when the last writer has | |
3518 | ** finished the transaction, and started it on its way to the disk. | |
0222e657 | 3519 | ** Then, we flush the commit or journal list, and just return 0 |
bd4c625c LT |
3520 | ** because the rest of journal end was already done for this transaction. |
3521 | */ | |
3522 | if (atomic_read(&(journal->j_wcount)) > 0) { | |
3523 | if (flush || commit_now) { | |
3524 | unsigned trans_id; | |
3525 | ||
3526 | jl = journal->j_current_jl; | |
3527 | trans_id = jl->j_trans_id; | |
3528 | if (wait_on_commit) | |
3529 | jl->j_state |= LIST_COMMIT_PENDING; | |
3530 | atomic_set(&(journal->j_jlock), 1); | |
3531 | if (flush) { | |
3532 | journal->j_next_full_flush = 1; | |
3533 | } | |
a9dd3643 | 3534 | unlock_journal(sb); |
bd4c625c LT |
3535 | |
3536 | /* sleep while the current transaction is still j_jlocked */ | |
3537 | while (journal->j_trans_id == trans_id) { | |
3538 | if (atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3539 | queue_log_writer(sb); |
bd4c625c | 3540 | } else { |
a9dd3643 | 3541 | lock_journal(sb); |
bd4c625c LT |
3542 | if (journal->j_trans_id == trans_id) { |
3543 | atomic_set(&(journal->j_jlock), | |
3544 | 1); | |
3545 | } | |
a9dd3643 | 3546 | unlock_journal(sb); |
bd4c625c LT |
3547 | } |
3548 | } | |
14a61442 ES |
3549 | BUG_ON(journal->j_trans_id == trans_id); |
3550 | ||
bd4c625c | 3551 | if (commit_now |
a9dd3643 | 3552 | && journal_list_still_alive(sb, trans_id) |
bd4c625c | 3553 | && wait_on_commit) { |
a9dd3643 | 3554 | flush_commit_list(sb, jl, 1); |
bd4c625c LT |
3555 | } |
3556 | return 0; | |
3557 | } | |
a9dd3643 | 3558 | unlock_journal(sb); |
bd4c625c LT |
3559 | return 0; |
3560 | } | |
3561 | ||
3562 | /* deal with old transactions where we are the last writers */ | |
3563 | now = get_seconds(); | |
3564 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
3565 | commit_now = 1; | |
3566 | journal->j_next_async_flush = 1; | |
3567 | } | |
3568 | /* don't batch when someone is waiting on j_join_wait */ | |
3569 | /* don't batch when syncing the commit or flushing the whole trans */ | |
3570 | if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) | |
3571 | && !flush && !commit_now && (journal->j_len < journal->j_max_batch) | |
3572 | && journal->j_len_alloc < journal->j_max_batch | |
3573 | && journal->j_cnode_free > (journal->j_trans_max * 3)) { | |
3574 | journal->j_bcount++; | |
a9dd3643 | 3575 | unlock_journal(sb); |
bd4c625c LT |
3576 | return 0; |
3577 | } | |
3578 | ||
a9dd3643 JM |
3579 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { |
3580 | reiserfs_panic(sb, "journal-003", | |
c3a9c210 | 3581 | "j_start (%ld) is too high", |
bd4c625c LT |
3582 | journal->j_start); |
3583 | } | |
3584 | return 1; | |
1da177e4 LT |
3585 | } |
3586 | ||
3587 | /* | |
3588 | ** Does all the work that makes deleting blocks safe. | |
3589 | ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. | |
0222e657 | 3590 | ** |
1da177e4 LT |
3591 | ** otherwise: |
3592 | ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes | |
3593 | ** before this transaction has finished. | |
3594 | ** | |
3595 | ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with | |
3596 | ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, | |
3597 | ** the block can't be reallocated yet. | |
3598 | ** | |
3599 | ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. | |
3600 | */ | |
bd4c625c | 3601 | int journal_mark_freed(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3602 | struct super_block *sb, b_blocknr_t blocknr) |
bd4c625c | 3603 | { |
a9dd3643 | 3604 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3605 | struct reiserfs_journal_cnode *cn = NULL; |
3606 | struct buffer_head *bh = NULL; | |
3607 | struct reiserfs_list_bitmap *jb = NULL; | |
3608 | int cleaned = 0; | |
3609 | BUG_ON(!th->t_trans_id); | |
3610 | ||
a9dd3643 | 3611 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3612 | if (cn && cn->bh) { |
3613 | bh = cn->bh; | |
3614 | get_bh(bh); | |
3615 | } | |
3616 | /* if it is journal new, we just remove it from this transaction */ | |
3617 | if (bh && buffer_journal_new(bh)) { | |
3618 | clear_buffer_journal_new(bh); | |
3619 | clear_prepared_bits(bh); | |
3620 | reiserfs_clean_and_file_buffer(bh); | |
a9dd3643 | 3621 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c LT |
3622 | } else { |
3623 | /* set the bit for this block in the journal bitmap for this transaction */ | |
3624 | jb = journal->j_current_jl->j_list_bitmap; | |
3625 | if (!jb) { | |
a9dd3643 | 3626 | reiserfs_panic(sb, "journal-1702", |
c3a9c210 | 3627 | "journal_list_bitmap is NULL"); |
bd4c625c | 3628 | } |
a9dd3643 | 3629 | set_bit_in_list_bitmap(sb, blocknr, jb); |
bd4c625c LT |
3630 | |
3631 | /* Note, the entire while loop is not allowed to schedule. */ | |
3632 | ||
3633 | if (bh) { | |
3634 | clear_prepared_bits(bh); | |
3635 | reiserfs_clean_and_file_buffer(bh); | |
3636 | } | |
a9dd3643 | 3637 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c LT |
3638 | |
3639 | /* find all older transactions with this block, make sure they don't try to write it out */ | |
a9dd3643 | 3640 | cn = get_journal_hash_dev(sb, journal->j_list_hash_table, |
bd4c625c LT |
3641 | blocknr); |
3642 | while (cn) { | |
a9dd3643 | 3643 | if (sb == cn->sb && blocknr == cn->blocknr) { |
bd4c625c LT |
3644 | set_bit(BLOCK_FREED, &cn->state); |
3645 | if (cn->bh) { | |
3646 | if (!cleaned) { | |
3647 | /* remove_from_transaction will brelse the buffer if it was | |
3648 | ** in the current trans | |
3649 | */ | |
3650 | clear_buffer_journal_dirty(cn-> | |
3651 | bh); | |
3652 | clear_buffer_dirty(cn->bh); | |
3653 | clear_buffer_journal_test(cn-> | |
3654 | bh); | |
3655 | cleaned = 1; | |
3656 | put_bh(cn->bh); | |
3657 | if (atomic_read | |
3658 | (&(cn->bh->b_count)) < 0) { | |
a9dd3643 | 3659 | reiserfs_warning(sb, |
45b03d5e JM |
3660 | "journal-2138", |
3661 | "cn->bh->b_count < 0"); | |
bd4c625c LT |
3662 | } |
3663 | } | |
3664 | if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ | |
3665 | atomic_dec(& | |
3666 | (cn->jlist-> | |
3667 | j_nonzerolen)); | |
3668 | } | |
3669 | cn->bh = NULL; | |
3670 | } | |
3671 | } | |
3672 | cn = cn->hnext; | |
3673 | } | |
3674 | } | |
3675 | ||
398c95bd CM |
3676 | if (bh) |
3677 | release_buffer_page(bh); /* get_hash grabs the buffer */ | |
bd4c625c LT |
3678 | return 0; |
3679 | } | |
3680 | ||
3681 | void reiserfs_update_inode_transaction(struct inode *inode) | |
3682 | { | |
3683 | struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); | |
3684 | REISERFS_I(inode)->i_jl = journal->j_current_jl; | |
3685 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id; | |
1da177e4 LT |
3686 | } |
3687 | ||
3688 | /* | |
3689 | * returns -1 on error, 0 if no commits/barriers were done and 1 | |
3690 | * if a transaction was actually committed and the barrier was done | |
3691 | */ | |
3692 | static int __commit_trans_jl(struct inode *inode, unsigned long id, | |
bd4c625c | 3693 | struct reiserfs_journal_list *jl) |
1da177e4 | 3694 | { |
bd4c625c LT |
3695 | struct reiserfs_transaction_handle th; |
3696 | struct super_block *sb = inode->i_sb; | |
3697 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
3698 | int ret = 0; | |
3699 | ||
3700 | /* is it from the current transaction, or from an unknown transaction? */ | |
3701 | if (id == journal->j_trans_id) { | |
3702 | jl = journal->j_current_jl; | |
3703 | /* try to let other writers come in and grow this transaction */ | |
3704 | let_transaction_grow(sb, id); | |
3705 | if (journal->j_trans_id != id) { | |
3706 | goto flush_commit_only; | |
3707 | } | |
1da177e4 | 3708 | |
bd4c625c LT |
3709 | ret = journal_begin(&th, sb, 1); |
3710 | if (ret) | |
3711 | return ret; | |
3712 | ||
3713 | /* someone might have ended this transaction while we joined */ | |
3714 | if (journal->j_trans_id != id) { | |
3715 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), | |
3716 | 1); | |
3717 | journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); | |
3718 | ret = journal_end(&th, sb, 1); | |
3719 | goto flush_commit_only; | |
3720 | } | |
1da177e4 | 3721 | |
bd4c625c LT |
3722 | ret = journal_end_sync(&th, sb, 1); |
3723 | if (!ret) | |
3724 | ret = 1; | |
1da177e4 | 3725 | |
bd4c625c LT |
3726 | } else { |
3727 | /* this gets tricky, we have to make sure the journal list in | |
3728 | * the inode still exists. We know the list is still around | |
3729 | * if we've got a larger transaction id than the oldest list | |
3730 | */ | |
3731 | flush_commit_only: | |
3732 | if (journal_list_still_alive(inode->i_sb, id)) { | |
3733 | /* | |
3734 | * we only set ret to 1 when we know for sure | |
3735 | * the barrier hasn't been started yet on the commit | |
3736 | * block. | |
3737 | */ | |
3738 | if (atomic_read(&jl->j_commit_left) > 1) | |
3739 | ret = 1; | |
3740 | flush_commit_list(sb, jl, 1); | |
3741 | if (journal->j_errno) | |
3742 | ret = journal->j_errno; | |
3743 | } | |
1da177e4 | 3744 | } |
bd4c625c LT |
3745 | /* otherwise the list is gone, and long since committed */ |
3746 | return ret; | |
3747 | } | |
1da177e4 | 3748 | |
bd4c625c LT |
3749 | int reiserfs_commit_for_inode(struct inode *inode) |
3750 | { | |
600ed416 | 3751 | unsigned int id = REISERFS_I(inode)->i_trans_id; |
bd4c625c | 3752 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; |
1da177e4 | 3753 | |
bd4c625c LT |
3754 | /* for the whole inode, assume unset id means it was |
3755 | * changed in the current transaction. More conservative | |
1da177e4 | 3756 | */ |
bd4c625c LT |
3757 | if (!id || !jl) { |
3758 | reiserfs_update_inode_transaction(inode); | |
3759 | id = REISERFS_I(inode)->i_trans_id; | |
3760 | /* jl will be updated in __commit_trans_jl */ | |
3761 | } | |
3762 | ||
3763 | return __commit_trans_jl(inode, id, jl); | |
3764 | } | |
3765 | ||
a9dd3643 | 3766 | void reiserfs_restore_prepared_buffer(struct super_block *sb, |
bd4c625c LT |
3767 | struct buffer_head *bh) |
3768 | { | |
a9dd3643 JM |
3769 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
3770 | PROC_INFO_INC(sb, journal.restore_prepared); | |
bd4c625c LT |
3771 | if (!bh) { |
3772 | return; | |
3773 | } | |
3774 | if (test_clear_buffer_journal_restore_dirty(bh) && | |
3775 | buffer_journal_dirty(bh)) { | |
3776 | struct reiserfs_journal_cnode *cn; | |
278f6679 | 3777 | reiserfs_write_lock(sb); |
a9dd3643 | 3778 | cn = get_journal_hash_dev(sb, |
bd4c625c LT |
3779 | journal->j_list_hash_table, |
3780 | bh->b_blocknr); | |
3781 | if (cn && can_dirty(cn)) { | |
3782 | set_buffer_journal_test(bh); | |
3783 | mark_buffer_dirty(bh); | |
3784 | } | |
278f6679 | 3785 | reiserfs_write_unlock(sb); |
bd4c625c LT |
3786 | } |
3787 | clear_buffer_journal_prepared(bh); | |
3788 | } | |
3789 | ||
3790 | extern struct tree_balance *cur_tb; | |
1da177e4 LT |
3791 | /* |
3792 | ** before we can change a metadata block, we have to make sure it won't | |
3793 | ** be written to disk while we are altering it. So, we must: | |
3794 | ** clean it | |
3795 | ** wait on it. | |
0222e657 | 3796 | ** |
1da177e4 | 3797 | */ |
a9dd3643 | 3798 | int reiserfs_prepare_for_journal(struct super_block *sb, |
bd4c625c LT |
3799 | struct buffer_head *bh, int wait) |
3800 | { | |
a9dd3643 | 3801 | PROC_INFO_INC(sb, journal.prepare); |
bd4c625c | 3802 | |
ca5de404 | 3803 | if (!trylock_buffer(bh)) { |
bd4c625c LT |
3804 | if (!wait) |
3805 | return 0; | |
3806 | lock_buffer(bh); | |
3807 | } | |
3808 | set_buffer_journal_prepared(bh); | |
3809 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { | |
3810 | clear_buffer_journal_test(bh); | |
3811 | set_buffer_journal_restore_dirty(bh); | |
3812 | } | |
3813 | unlock_buffer(bh); | |
3814 | return 1; | |
3815 | } | |
3816 | ||
0222e657 | 3817 | /* |
1da177e4 LT |
3818 | ** long and ugly. If flush, will not return until all commit |
3819 | ** blocks and all real buffers in the trans are on disk. | |
3820 | ** If no_async, won't return until all commit blocks are on disk. | |
3821 | ** | |
3822 | ** keep reading, there are comments as you go along | |
3823 | ** | |
3824 | ** If the journal is aborted, we just clean up. Things like flushing | |
3825 | ** journal lists, etc just won't happen. | |
3826 | */ | |
bd4c625c | 3827 | static int do_journal_end(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3828 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3829 | int flags) |
3830 | { | |
a9dd3643 | 3831 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3832 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; |
3833 | struct reiserfs_journal_cnode *last_cn = NULL; | |
3834 | struct reiserfs_journal_desc *desc; | |
3835 | struct reiserfs_journal_commit *commit; | |
3836 | struct buffer_head *c_bh; /* commit bh */ | |
3837 | struct buffer_head *d_bh; /* desc bh */ | |
3838 | int cur_write_start = 0; /* start index of current log write */ | |
3839 | int old_start; | |
3840 | int i; | |
a44c94a7 AZ |
3841 | int flush; |
3842 | int wait_on_commit; | |
bd4c625c LT |
3843 | struct reiserfs_journal_list *jl, *temp_jl; |
3844 | struct list_head *entry, *safe; | |
3845 | unsigned long jindex; | |
600ed416 | 3846 | unsigned int commit_trans_id; |
bd4c625c | 3847 | int trans_half; |
278f6679 | 3848 | int depth; |
bd4c625c LT |
3849 | |
3850 | BUG_ON(th->t_refcount > 1); | |
3851 | BUG_ON(!th->t_trans_id); | |
3852 | ||
a44c94a7 AZ |
3853 | /* protect flush_older_commits from doing mistakes if the |
3854 | transaction ID counter gets overflowed. */ | |
600ed416 | 3855 | if (th->t_trans_id == ~0U) |
a44c94a7 AZ |
3856 | flags |= FLUSH_ALL | COMMIT_NOW | WAIT; |
3857 | flush = flags & FLUSH_ALL; | |
3858 | wait_on_commit = flags & WAIT; | |
3859 | ||
bd4c625c | 3860 | current->journal_info = th->t_handle_save; |
a9dd3643 | 3861 | reiserfs_check_lock_depth(sb, "journal end"); |
bd4c625c | 3862 | if (journal->j_len == 0) { |
a9dd3643 | 3863 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3864 | 1); |
a9dd3643 | 3865 | journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3866 | } |
1da177e4 | 3867 | |
a9dd3643 | 3868 | lock_journal(sb); |
bd4c625c LT |
3869 | if (journal->j_next_full_flush) { |
3870 | flags |= FLUSH_ALL; | |
3871 | flush = 1; | |
3872 | } | |
3873 | if (journal->j_next_async_flush) { | |
3874 | flags |= COMMIT_NOW | WAIT; | |
3875 | wait_on_commit = 1; | |
3876 | } | |
3877 | ||
0222e657 | 3878 | /* check_journal_end locks the journal, and unlocks if it does not return 1 |
bd4c625c LT |
3879 | ** it tells us if we should continue with the journal_end, or just return |
3880 | */ | |
a9dd3643 | 3881 | if (!check_journal_end(th, sb, nblocks, flags)) { |
033369d1 | 3882 | reiserfs_schedule_old_flush(sb); |
a9dd3643 JM |
3883 | wake_queued_writers(sb); |
3884 | reiserfs_async_progress_wait(sb); | |
bd4c625c LT |
3885 | goto out; |
3886 | } | |
3887 | ||
3888 | /* check_journal_end might set these, check again */ | |
3889 | if (journal->j_next_full_flush) { | |
3890 | flush = 1; | |
3891 | } | |
3892 | ||
3893 | /* | |
3894 | ** j must wait means we have to flush the log blocks, and the real blocks for | |
3895 | ** this transaction | |
3896 | */ | |
3897 | if (journal->j_must_wait > 0) { | |
3898 | flush = 1; | |
3899 | } | |
1da177e4 | 3900 | #ifdef REISERFS_PREALLOCATE |
ef43bc4f JK |
3901 | /* quota ops might need to nest, setup the journal_info pointer for them |
3902 | * and raise the refcount so that it is > 0. */ | |
bd4c625c | 3903 | current->journal_info = th; |
ef43bc4f | 3904 | th->t_refcount++; |
bd4c625c LT |
3905 | reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into |
3906 | * the transaction */ | |
ef43bc4f | 3907 | th->t_refcount--; |
bd4c625c | 3908 | current->journal_info = th->t_handle_save; |
1da177e4 | 3909 | #endif |
bd4c625c LT |
3910 | |
3911 | /* setup description block */ | |
3912 | d_bh = | |
a9dd3643 JM |
3913 | journal_getblk(sb, |
3914 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
3915 | journal->j_start); |
3916 | set_buffer_uptodate(d_bh); | |
3917 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; | |
3918 | memset(d_bh->b_data, 0, d_bh->b_size); | |
3919 | memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); | |
3920 | set_desc_trans_id(desc, journal->j_trans_id); | |
3921 | ||
3922 | /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ | |
a9dd3643 | 3923 | c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 3924 | ((journal->j_start + journal->j_len + |
a9dd3643 | 3925 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
3926 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
3927 | memset(c_bh->b_data, 0, c_bh->b_size); | |
3928 | set_commit_trans_id(commit, journal->j_trans_id); | |
3929 | set_buffer_uptodate(c_bh); | |
3930 | ||
3931 | /* init this journal list */ | |
3932 | jl = journal->j_current_jl; | |
3933 | ||
3934 | /* we lock the commit before doing anything because | |
3935 | * we want to make sure nobody tries to run flush_commit_list until | |
3936 | * the new transaction is fully setup, and we've already flushed the | |
3937 | * ordered bh list | |
3938 | */ | |
8ebc4232 | 3939 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); |
bd4c625c LT |
3940 | |
3941 | /* save the transaction id in case we need to commit it later */ | |
3942 | commit_trans_id = jl->j_trans_id; | |
3943 | ||
3944 | atomic_set(&jl->j_older_commits_done, 0); | |
3945 | jl->j_trans_id = journal->j_trans_id; | |
3946 | jl->j_timestamp = journal->j_trans_start_time; | |
3947 | jl->j_commit_bh = c_bh; | |
3948 | jl->j_start = journal->j_start; | |
3949 | jl->j_len = journal->j_len; | |
3950 | atomic_set(&jl->j_nonzerolen, journal->j_len); | |
3951 | atomic_set(&jl->j_commit_left, journal->j_len + 2); | |
3952 | jl->j_realblock = NULL; | |
3953 | ||
3954 | /* The ENTIRE FOR LOOP MUST not cause schedule to occur. | |
3955 | ** for each real block, add it to the journal list hash, | |
3956 | ** copy into real block index array in the commit or desc block | |
3957 | */ | |
a9dd3643 | 3958 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
3959 | for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { |
3960 | if (buffer_journaled(cn->bh)) { | |
a9dd3643 | 3961 | jl_cn = get_cnode(sb); |
bd4c625c | 3962 | if (!jl_cn) { |
a9dd3643 | 3963 | reiserfs_panic(sb, "journal-1676", |
c3a9c210 | 3964 | "get_cnode returned NULL"); |
bd4c625c LT |
3965 | } |
3966 | if (i == 0) { | |
3967 | jl->j_realblock = jl_cn; | |
3968 | } | |
3969 | jl_cn->prev = last_cn; | |
3970 | jl_cn->next = NULL; | |
3971 | if (last_cn) { | |
3972 | last_cn->next = jl_cn; | |
3973 | } | |
3974 | last_cn = jl_cn; | |
0222e657 | 3975 | /* make sure the block we are trying to log is not a block |
bd4c625c LT |
3976 | of journal or reserved area */ |
3977 | ||
3978 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
3979 | (sb, cn->bh->b_blocknr)) { |
3980 | reiserfs_panic(sb, "journal-2332", | |
c3a9c210 JM |
3981 | "Trying to log block %lu, " |
3982 | "which is a log block", | |
bd4c625c LT |
3983 | cn->bh->b_blocknr); |
3984 | } | |
3985 | jl_cn->blocknr = cn->bh->b_blocknr; | |
3986 | jl_cn->state = 0; | |
a9dd3643 | 3987 | jl_cn->sb = sb; |
bd4c625c LT |
3988 | jl_cn->bh = cn->bh; |
3989 | jl_cn->jlist = jl; | |
3990 | insert_journal_hash(journal->j_list_hash_table, jl_cn); | |
3991 | if (i < trans_half) { | |
3992 | desc->j_realblock[i] = | |
3993 | cpu_to_le32(cn->bh->b_blocknr); | |
3994 | } else { | |
3995 | commit->j_realblock[i - trans_half] = | |
3996 | cpu_to_le32(cn->bh->b_blocknr); | |
3997 | } | |
3998 | } else { | |
3999 | i--; | |
4000 | } | |
4001 | } | |
4002 | set_desc_trans_len(desc, journal->j_len); | |
4003 | set_desc_mount_id(desc, journal->j_mount_id); | |
4004 | set_desc_trans_id(desc, journal->j_trans_id); | |
4005 | set_commit_trans_len(commit, journal->j_len); | |
4006 | ||
4007 | /* special check in case all buffers in the journal were marked for not logging */ | |
14a61442 | 4008 | BUG_ON(journal->j_len == 0); |
bd4c625c LT |
4009 | |
4010 | /* we're about to dirty all the log blocks, mark the description block | |
4011 | * dirty now too. Don't mark the commit block dirty until all the | |
4012 | * others are on disk | |
4013 | */ | |
4014 | mark_buffer_dirty(d_bh); | |
4015 | ||
4016 | /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ | |
4017 | cur_write_start = journal->j_start; | |
4018 | cn = journal->j_first; | |
4019 | jindex = 1; /* start at one so we don't get the desc again */ | |
4020 | while (cn) { | |
4021 | clear_buffer_journal_new(cn->bh); | |
4022 | /* copy all the real blocks into log area. dirty log blocks */ | |
4023 | if (buffer_journaled(cn->bh)) { | |
4024 | struct buffer_head *tmp_bh; | |
4025 | char *addr; | |
4026 | struct page *page; | |
4027 | tmp_bh = | |
a9dd3643 JM |
4028 | journal_getblk(sb, |
4029 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4030 | ((cur_write_start + |
4031 | jindex) % | |
a9dd3643 | 4032 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4033 | set_buffer_uptodate(tmp_bh); |
4034 | page = cn->bh->b_page; | |
4035 | addr = kmap(page); | |
4036 | memcpy(tmp_bh->b_data, | |
4037 | addr + offset_in_page(cn->bh->b_data), | |
4038 | cn->bh->b_size); | |
4039 | kunmap(page); | |
4040 | mark_buffer_dirty(tmp_bh); | |
4041 | jindex++; | |
4042 | set_buffer_journal_dirty(cn->bh); | |
4043 | clear_buffer_journaled(cn->bh); | |
4044 | } else { | |
4045 | /* JDirty cleared sometime during transaction. don't log this one */ | |
a9dd3643 | 4046 | reiserfs_warning(sb, "journal-2048", |
45b03d5e JM |
4047 | "BAD, buffer in journal hash, " |
4048 | "but not JDirty!"); | |
bd4c625c LT |
4049 | brelse(cn->bh); |
4050 | } | |
4051 | next = cn->next; | |
a9dd3643 | 4052 | free_cnode(sb, cn); |
bd4c625c | 4053 | cn = next; |
278f6679 | 4054 | reiserfs_cond_resched(sb); |
bd4c625c LT |
4055 | } |
4056 | ||
4057 | /* we are done with both the c_bh and d_bh, but | |
4058 | ** c_bh must be written after all other commit blocks, | |
4059 | ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. | |
4060 | */ | |
4061 | ||
a9dd3643 | 4062 | journal->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
4063 | |
4064 | /* now it is safe to insert this transaction on the main list */ | |
4065 | list_add_tail(&jl->j_list, &journal->j_journal_list); | |
4066 | list_add_tail(&jl->j_working_list, &journal->j_working_list); | |
4067 | journal->j_num_work_lists++; | |
4068 | ||
4069 | /* reset journal values for the next transaction */ | |
4070 | old_start = journal->j_start; | |
4071 | journal->j_start = | |
4072 | (journal->j_start + journal->j_len + | |
a9dd3643 | 4073 | 2) % SB_ONDISK_JOURNAL_SIZE(sb); |
bd4c625c LT |
4074 | atomic_set(&(journal->j_wcount), 0); |
4075 | journal->j_bcount = 0; | |
4076 | journal->j_last = NULL; | |
4077 | journal->j_first = NULL; | |
4078 | journal->j_len = 0; | |
4079 | journal->j_trans_start_time = 0; | |
a44c94a7 AZ |
4080 | /* check for trans_id overflow */ |
4081 | if (++journal->j_trans_id == 0) | |
4082 | journal->j_trans_id = 10; | |
bd4c625c LT |
4083 | journal->j_current_jl->j_trans_id = journal->j_trans_id; |
4084 | journal->j_must_wait = 0; | |
4085 | journal->j_len_alloc = 0; | |
4086 | journal->j_next_full_flush = 0; | |
4087 | journal->j_next_async_flush = 0; | |
a9dd3643 | 4088 | init_journal_hash(sb); |
bd4c625c LT |
4089 | |
4090 | // make sure reiserfs_add_jh sees the new current_jl before we | |
4091 | // write out the tails | |
4092 | smp_mb(); | |
4093 | ||
4094 | /* tail conversion targets have to hit the disk before we end the | |
4095 | * transaction. Otherwise a later transaction might repack the tail | |
4096 | * before this transaction commits, leaving the data block unflushed and | |
4097 | * clean, if we crash before the later transaction commits, the data block | |
4098 | * is lost. | |
4099 | */ | |
4100 | if (!list_empty(&jl->j_tail_bh_list)) { | |
278f6679 | 4101 | depth = reiserfs_write_unlock_nested(sb); |
bd4c625c LT |
4102 | write_ordered_buffers(&journal->j_dirty_buffers_lock, |
4103 | journal, jl, &jl->j_tail_bh_list); | |
278f6679 | 4104 | reiserfs_write_lock_nested(sb, depth); |
bd4c625c | 4105 | } |
14a61442 | 4106 | BUG_ON(!list_empty(&jl->j_tail_bh_list)); |
90415dea | 4107 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
4108 | |
4109 | /* honor the flush wishes from the caller, simple commits can | |
4110 | ** be done outside the journal lock, they are done below | |
4111 | ** | |
4112 | ** if we don't flush the commit list right now, we put it into | |
4113 | ** the work queue so the people waiting on the async progress work | |
4114 | ** queue don't wait for this proc to flush journal lists and such. | |
4115 | */ | |
4116 | if (flush) { | |
a9dd3643 JM |
4117 | flush_commit_list(sb, jl, 1); |
4118 | flush_journal_list(sb, jl, 1); | |
bd4c625c | 4119 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) |
797d9016 JM |
4120 | queue_delayed_work(REISERFS_SB(sb)->commit_wq, |
4121 | &journal->j_work, HZ / 10); | |
bd4c625c | 4122 | |
0222e657 JM |
4123 | /* if the next transaction has any chance of wrapping, flush |
4124 | ** transactions that might get overwritten. If any journal lists are very | |
4125 | ** old flush them as well. | |
bd4c625c LT |
4126 | */ |
4127 | first_jl: | |
4128 | list_for_each_safe(entry, safe, &journal->j_journal_list) { | |
4129 | temp_jl = JOURNAL_LIST_ENTRY(entry); | |
4130 | if (journal->j_start <= temp_jl->j_start) { | |
4131 | if ((journal->j_start + journal->j_trans_max + 1) >= | |
4132 | temp_jl->j_start) { | |
a9dd3643 | 4133 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4134 | goto first_jl; |
4135 | } else if ((journal->j_start + | |
4136 | journal->j_trans_max + 1) < | |
a9dd3643 | 4137 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c LT |
4138 | /* if we don't cross into the next transaction and we don't |
4139 | * wrap, there is no way we can overlap any later transactions | |
4140 | * break now | |
4141 | */ | |
4142 | break; | |
4143 | } | |
4144 | } else if ((journal->j_start + | |
4145 | journal->j_trans_max + 1) > | |
a9dd3643 | 4146 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c | 4147 | if (((journal->j_start + journal->j_trans_max + 1) % |
a9dd3643 | 4148 | SB_ONDISK_JOURNAL_SIZE(sb)) >= |
bd4c625c | 4149 | temp_jl->j_start) { |
a9dd3643 | 4150 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4151 | goto first_jl; |
4152 | } else { | |
4153 | /* we don't overlap anything from out start to the end of the | |
4154 | * log, and our wrapped portion doesn't overlap anything at | |
4155 | * the start of the log. We can break | |
4156 | */ | |
4157 | break; | |
4158 | } | |
4159 | } | |
4160 | } | |
bd4c625c LT |
4161 | |
4162 | journal->j_current_jl->j_list_bitmap = | |
a9dd3643 | 4163 | get_list_bitmap(sb, journal->j_current_jl); |
bd4c625c LT |
4164 | |
4165 | if (!(journal->j_current_jl->j_list_bitmap)) { | |
a9dd3643 | 4166 | reiserfs_panic(sb, "journal-1996", |
c3a9c210 | 4167 | "could not get a list bitmap"); |
bd4c625c LT |
4168 | } |
4169 | ||
4170 | atomic_set(&(journal->j_jlock), 0); | |
a9dd3643 | 4171 | unlock_journal(sb); |
bd4c625c LT |
4172 | /* wake up any body waiting to join. */ |
4173 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); | |
4174 | wake_up(&(journal->j_join_wait)); | |
4175 | ||
4176 | if (!flush && wait_on_commit && | |
a9dd3643 JM |
4177 | journal_list_still_alive(sb, commit_trans_id)) { |
4178 | flush_commit_list(sb, jl, 1); | |
bd4c625c LT |
4179 | } |
4180 | out: | |
a9dd3643 | 4181 | reiserfs_check_lock_depth(sb, "journal end2"); |
bd4c625c LT |
4182 | |
4183 | memset(th, 0, sizeof(*th)); | |
4184 | /* Re-set th->t_super, so we can properly keep track of how many | |
4185 | * persistent transactions there are. We need to do this so if this | |
4186 | * call is part of a failed restart_transaction, we can free it later */ | |
a9dd3643 | 4187 | th->t_super = sb; |
bd4c625c LT |
4188 | |
4189 | return journal->j_errno; | |
4190 | } | |
4191 | ||
32e8b106 JM |
4192 | /* Send the file system read only and refuse new transactions */ |
4193 | void reiserfs_abort_journal(struct super_block *sb, int errno) | |
bd4c625c LT |
4194 | { |
4195 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
4196 | if (test_bit(J_ABORTED, &journal->j_state)) | |
4197 | return; | |
4198 | ||
32e8b106 JM |
4199 | if (!journal->j_errno) |
4200 | journal->j_errno = errno; | |
bd4c625c LT |
4201 | |
4202 | sb->s_flags |= MS_RDONLY; | |
4203 | set_bit(J_ABORTED, &journal->j_state); | |
1da177e4 LT |
4204 | |
4205 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 4206 | dump_stack(); |
1da177e4 LT |
4207 | #endif |
4208 | } |