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 LT |
39 | #include <linux/vmalloc.h> |
40 | #include <linux/reiserfs_fs.h> | |
1da177e4 LT |
41 | #include <linux/kernel.h> |
42 | #include <linux/errno.h> | |
43 | #include <linux/fcntl.h> | |
44 | #include <linux/stat.h> | |
45 | #include <linux/string.h> | |
1da177e4 LT |
46 | #include <linux/buffer_head.h> |
47 | #include <linux/workqueue.h> | |
48 | #include <linux/writeback.h> | |
49 | #include <linux/blkdev.h> | |
3fcfab16 | 50 | #include <linux/backing-dev.h> |
90415dea | 51 | #include <linux/uaccess.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
90415dea JM |
53 | |
54 | #include <asm/system.h> | |
1da177e4 | 55 | |
1da177e4 LT |
56 | /* gets a struct reiserfs_journal_list * from a list head */ |
57 | #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
58 | j_list)) | |
59 | #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \ | |
60 | j_working_list)) | |
61 | ||
62 | /* the number of mounted filesystems. This is used to decide when to | |
63 | ** start and kill the commit workqueue | |
64 | */ | |
65 | static int reiserfs_mounted_fs_count; | |
66 | ||
67 | static struct workqueue_struct *commit_wq; | |
68 | ||
bd4c625c LT |
69 | #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit |
70 | structs at 4k */ | |
71 | #define BUFNR 64 /*read ahead */ | |
1da177e4 LT |
72 | |
73 | /* cnode stat bits. Move these into reiserfs_fs.h */ | |
74 | ||
75 | #define BLOCK_FREED 2 /* this block was freed, and can't be written. */ | |
bd4c625c | 76 | #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */ |
1da177e4 LT |
77 | |
78 | #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */ | |
79 | #define BLOCK_DIRTIED 5 | |
80 | ||
1da177e4 LT |
81 | /* journal list state bits */ |
82 | #define LIST_TOUCHED 1 | |
83 | #define LIST_DIRTY 2 | |
bd4c625c | 84 | #define LIST_COMMIT_PENDING 4 /* someone will commit this list */ |
1da177e4 LT |
85 | |
86 | /* flags for do_journal_end */ | |
87 | #define FLUSH_ALL 1 /* flush commit and real blocks */ | |
88 | #define COMMIT_NOW 2 /* end and commit this transaction */ | |
bd4c625c LT |
89 | #define WAIT 4 /* wait for the log blocks to hit the disk */ |
90 | ||
91 | static int do_journal_end(struct reiserfs_transaction_handle *, | |
92 | struct super_block *, unsigned long nblocks, | |
93 | int flags); | |
94 | static int flush_journal_list(struct super_block *s, | |
95 | struct reiserfs_journal_list *jl, int flushall); | |
96 | static int flush_commit_list(struct super_block *s, | |
97 | struct reiserfs_journal_list *jl, int flushall); | |
98 | static int can_dirty(struct reiserfs_journal_cnode *cn); | |
99 | static int journal_join(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 100 | struct super_block *sb, unsigned long nblocks); |
bd4c625c LT |
101 | static int release_journal_dev(struct super_block *super, |
102 | struct reiserfs_journal *journal); | |
1da177e4 | 103 | static int dirty_one_transaction(struct super_block *s, |
bd4c625c | 104 | struct reiserfs_journal_list *jl); |
c4028958 | 105 | static void flush_async_commits(struct work_struct *work); |
1da177e4 LT |
106 | static void queue_log_writer(struct super_block *s); |
107 | ||
108 | /* values for join in do_journal_begin_r */ | |
109 | enum { | |
bd4c625c LT |
110 | JBEGIN_REG = 0, /* regular journal begin */ |
111 | JBEGIN_JOIN = 1, /* join the running transaction if at all possible */ | |
112 | JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */ | |
1da177e4 LT |
113 | }; |
114 | ||
115 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 116 | struct super_block *sb, |
bd4c625c | 117 | unsigned long nblocks, int join); |
1da177e4 | 118 | |
a9dd3643 | 119 | static void init_journal_hash(struct super_block *sb) |
bd4c625c | 120 | { |
a9dd3643 | 121 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
122 | memset(journal->j_hash_table, 0, |
123 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
1da177e4 LT |
124 | } |
125 | ||
126 | /* | |
127 | ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to | |
128 | ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for | |
129 | ** more details. | |
130 | */ | |
bd4c625c LT |
131 | static int reiserfs_clean_and_file_buffer(struct buffer_head *bh) |
132 | { | |
133 | if (bh) { | |
134 | clear_buffer_dirty(bh); | |
135 | clear_buffer_journal_test(bh); | |
136 | } | |
137 | return 0; | |
1da177e4 LT |
138 | } |
139 | ||
bd4c625c | 140 | static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block |
a9dd3643 | 141 | *sb) |
bd4c625c LT |
142 | { |
143 | struct reiserfs_bitmap_node *bn; | |
144 | static int id; | |
145 | ||
d739b42b | 146 | bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS); |
bd4c625c LT |
147 | if (!bn) { |
148 | return NULL; | |
149 | } | |
a9dd3643 | 150 | bn->data = kzalloc(sb->s_blocksize, GFP_NOFS); |
bd4c625c | 151 | if (!bn->data) { |
d739b42b | 152 | kfree(bn); |
bd4c625c LT |
153 | return NULL; |
154 | } | |
155 | bn->id = id++; | |
bd4c625c LT |
156 | INIT_LIST_HEAD(&bn->list); |
157 | return bn; | |
158 | } | |
159 | ||
a9dd3643 | 160 | static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb) |
bd4c625c | 161 | { |
a9dd3643 | 162 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
163 | struct reiserfs_bitmap_node *bn = NULL; |
164 | struct list_head *entry = journal->j_bitmap_nodes.next; | |
165 | ||
166 | journal->j_used_bitmap_nodes++; | |
167 | repeat: | |
168 | ||
169 | if (entry != &journal->j_bitmap_nodes) { | |
170 | bn = list_entry(entry, struct reiserfs_bitmap_node, list); | |
171 | list_del(entry); | |
a9dd3643 | 172 | memset(bn->data, 0, sb->s_blocksize); |
bd4c625c LT |
173 | journal->j_free_bitmap_nodes--; |
174 | return bn; | |
175 | } | |
a9dd3643 | 176 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
177 | if (!bn) { |
178 | yield(); | |
179 | goto repeat; | |
180 | } | |
181 | return bn; | |
1da177e4 | 182 | } |
a9dd3643 | 183 | static inline void free_bitmap_node(struct super_block *sb, |
bd4c625c LT |
184 | struct reiserfs_bitmap_node *bn) |
185 | { | |
a9dd3643 | 186 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
187 | journal->j_used_bitmap_nodes--; |
188 | if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) { | |
d739b42b PE |
189 | kfree(bn->data); |
190 | kfree(bn); | |
bd4c625c LT |
191 | } else { |
192 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
193 | journal->j_free_bitmap_nodes++; | |
194 | } | |
195 | } | |
196 | ||
a9dd3643 | 197 | static void allocate_bitmap_nodes(struct super_block *sb) |
bd4c625c LT |
198 | { |
199 | int i; | |
a9dd3643 | 200 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
201 | struct reiserfs_bitmap_node *bn = NULL; |
202 | for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) { | |
a9dd3643 | 203 | bn = allocate_bitmap_node(sb); |
bd4c625c LT |
204 | if (bn) { |
205 | list_add(&bn->list, &journal->j_bitmap_nodes); | |
206 | journal->j_free_bitmap_nodes++; | |
207 | } else { | |
0222e657 | 208 | break; /* this is ok, we'll try again when more are needed */ |
bd4c625c LT |
209 | } |
210 | } | |
1da177e4 LT |
211 | } |
212 | ||
a9dd3643 | 213 | static int set_bit_in_list_bitmap(struct super_block *sb, |
3ee16670 | 214 | b_blocknr_t block, |
bd4c625c LT |
215 | struct reiserfs_list_bitmap *jb) |
216 | { | |
a9dd3643 JM |
217 | unsigned int bmap_nr = block / (sb->s_blocksize << 3); |
218 | unsigned int bit_nr = block % (sb->s_blocksize << 3); | |
1da177e4 | 219 | |
bd4c625c | 220 | if (!jb->bitmaps[bmap_nr]) { |
a9dd3643 | 221 | jb->bitmaps[bmap_nr] = get_bitmap_node(sb); |
bd4c625c LT |
222 | } |
223 | set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data); | |
224 | return 0; | |
1da177e4 LT |
225 | } |
226 | ||
a9dd3643 | 227 | static void cleanup_bitmap_list(struct super_block *sb, |
bd4c625c LT |
228 | struct reiserfs_list_bitmap *jb) |
229 | { | |
230 | int i; | |
231 | if (jb->bitmaps == NULL) | |
232 | return; | |
233 | ||
a9dd3643 | 234 | for (i = 0; i < reiserfs_bmap_count(sb); i++) { |
bd4c625c | 235 | if (jb->bitmaps[i]) { |
a9dd3643 | 236 | free_bitmap_node(sb, jb->bitmaps[i]); |
bd4c625c LT |
237 | jb->bitmaps[i] = NULL; |
238 | } | |
239 | } | |
1da177e4 LT |
240 | } |
241 | ||
242 | /* | |
243 | ** only call this on FS unmount. | |
244 | */ | |
a9dd3643 | 245 | static int free_list_bitmaps(struct super_block *sb, |
bd4c625c LT |
246 | struct reiserfs_list_bitmap *jb_array) |
247 | { | |
248 | int i; | |
249 | struct reiserfs_list_bitmap *jb; | |
250 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
251 | jb = jb_array + i; | |
252 | jb->journal_list = NULL; | |
a9dd3643 | 253 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
254 | vfree(jb->bitmaps); |
255 | jb->bitmaps = NULL; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
a9dd3643 | 260 | static int free_bitmap_nodes(struct super_block *sb) |
bd4c625c | 261 | { |
a9dd3643 | 262 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
263 | struct list_head *next = journal->j_bitmap_nodes.next; |
264 | struct reiserfs_bitmap_node *bn; | |
265 | ||
266 | while (next != &journal->j_bitmap_nodes) { | |
267 | bn = list_entry(next, struct reiserfs_bitmap_node, list); | |
268 | list_del(next); | |
d739b42b PE |
269 | kfree(bn->data); |
270 | kfree(bn); | |
bd4c625c LT |
271 | next = journal->j_bitmap_nodes.next; |
272 | journal->j_free_bitmap_nodes--; | |
273 | } | |
274 | ||
275 | return 0; | |
1da177e4 LT |
276 | } |
277 | ||
278 | /* | |
0222e657 | 279 | ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps. |
1da177e4 LT |
280 | ** jb_array is the array to be filled in. |
281 | */ | |
a9dd3643 | 282 | int reiserfs_allocate_list_bitmaps(struct super_block *sb, |
bd4c625c | 283 | struct reiserfs_list_bitmap *jb_array, |
3ee16670 | 284 | unsigned int bmap_nr) |
bd4c625c LT |
285 | { |
286 | int i; | |
287 | int failed = 0; | |
288 | struct reiserfs_list_bitmap *jb; | |
289 | int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *); | |
290 | ||
291 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
292 | jb = jb_array + i; | |
293 | jb->journal_list = NULL; | |
294 | jb->bitmaps = vmalloc(mem); | |
295 | if (!jb->bitmaps) { | |
a9dd3643 | 296 | reiserfs_warning(sb, "clm-2000", "unable to " |
45b03d5e | 297 | "allocate bitmaps for journal lists"); |
bd4c625c LT |
298 | failed = 1; |
299 | break; | |
300 | } | |
301 | memset(jb->bitmaps, 0, mem); | |
302 | } | |
303 | if (failed) { | |
a9dd3643 | 304 | free_list_bitmaps(sb, jb_array); |
bd4c625c LT |
305 | return -1; |
306 | } | |
307 | return 0; | |
1da177e4 LT |
308 | } |
309 | ||
310 | /* | |
0222e657 | 311 | ** find an available list bitmap. If you can't find one, flush a commit list |
1da177e4 LT |
312 | ** and try again |
313 | */ | |
a9dd3643 | 314 | static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb, |
bd4c625c LT |
315 | struct reiserfs_journal_list |
316 | *jl) | |
317 | { | |
318 | int i, j; | |
a9dd3643 | 319 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
320 | struct reiserfs_list_bitmap *jb = NULL; |
321 | ||
322 | for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) { | |
323 | i = journal->j_list_bitmap_index; | |
324 | journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS; | |
325 | jb = journal->j_list_bitmap + i; | |
326 | if (journal->j_list_bitmap[i].journal_list) { | |
a9dd3643 | 327 | flush_commit_list(sb, |
bd4c625c LT |
328 | journal->j_list_bitmap[i]. |
329 | journal_list, 1); | |
330 | if (!journal->j_list_bitmap[i].journal_list) { | |
331 | break; | |
332 | } | |
333 | } else { | |
334 | break; | |
335 | } | |
336 | } | |
337 | if (jb->journal_list) { /* double check to make sure if flushed correctly */ | |
338 | return NULL; | |
339 | } | |
340 | jb->journal_list = jl; | |
341 | return jb; | |
1da177e4 LT |
342 | } |
343 | ||
0222e657 | 344 | /* |
1da177e4 LT |
345 | ** allocates a new chunk of X nodes, and links them all together as a list. |
346 | ** Uses the cnode->next and cnode->prev pointers | |
347 | ** returns NULL on failure | |
348 | */ | |
bd4c625c LT |
349 | static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes) |
350 | { | |
351 | struct reiserfs_journal_cnode *head; | |
352 | int i; | |
353 | if (num_cnodes <= 0) { | |
354 | return NULL; | |
355 | } | |
356 | head = vmalloc(num_cnodes * sizeof(struct reiserfs_journal_cnode)); | |
357 | if (!head) { | |
358 | return NULL; | |
359 | } | |
360 | memset(head, 0, num_cnodes * sizeof(struct reiserfs_journal_cnode)); | |
361 | head[0].prev = NULL; | |
362 | head[0].next = head + 1; | |
363 | for (i = 1; i < num_cnodes; i++) { | |
364 | head[i].prev = head + (i - 1); | |
365 | head[i].next = head + (i + 1); /* if last one, overwrite it after the if */ | |
366 | } | |
367 | head[num_cnodes - 1].next = NULL; | |
368 | return head; | |
1da177e4 LT |
369 | } |
370 | ||
371 | /* | |
0222e657 | 372 | ** pulls a cnode off the free list, or returns NULL on failure |
1da177e4 | 373 | */ |
a9dd3643 | 374 | static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb) |
bd4c625c LT |
375 | { |
376 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 377 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 378 | |
a9dd3643 | 379 | reiserfs_check_lock_depth(sb, "get_cnode"); |
bd4c625c LT |
380 | |
381 | if (journal->j_cnode_free <= 0) { | |
382 | return NULL; | |
383 | } | |
384 | journal->j_cnode_used++; | |
385 | journal->j_cnode_free--; | |
386 | cn = journal->j_cnode_free_list; | |
387 | if (!cn) { | |
388 | return cn; | |
389 | } | |
390 | if (cn->next) { | |
391 | cn->next->prev = NULL; | |
392 | } | |
393 | journal->j_cnode_free_list = cn->next; | |
394 | memset(cn, 0, sizeof(struct reiserfs_journal_cnode)); | |
395 | return cn; | |
1da177e4 LT |
396 | } |
397 | ||
398 | /* | |
0222e657 | 399 | ** returns a cnode to the free list |
1da177e4 | 400 | */ |
a9dd3643 | 401 | static void free_cnode(struct super_block *sb, |
bd4c625c LT |
402 | struct reiserfs_journal_cnode *cn) |
403 | { | |
a9dd3643 | 404 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 405 | |
a9dd3643 | 406 | reiserfs_check_lock_depth(sb, "free_cnode"); |
1da177e4 | 407 | |
bd4c625c LT |
408 | journal->j_cnode_used--; |
409 | journal->j_cnode_free++; | |
410 | /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */ | |
411 | cn->next = journal->j_cnode_free_list; | |
412 | if (journal->j_cnode_free_list) { | |
413 | journal->j_cnode_free_list->prev = cn; | |
414 | } | |
415 | cn->prev = NULL; /* not needed with the memset, but I might kill the memset, and forget to do this */ | |
416 | journal->j_cnode_free_list = cn; | |
1da177e4 LT |
417 | } |
418 | ||
bd4c625c LT |
419 | static void clear_prepared_bits(struct buffer_head *bh) |
420 | { | |
421 | clear_buffer_journal_prepared(bh); | |
422 | clear_buffer_journal_restore_dirty(bh); | |
1da177e4 LT |
423 | } |
424 | ||
1da177e4 | 425 | /* return a cnode with same dev, block number and size in table, or null if not found */ |
bd4c625c LT |
426 | static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct |
427 | super_block | |
428 | *sb, | |
429 | struct | |
430 | reiserfs_journal_cnode | |
431 | **table, | |
432 | long bl) | |
1da177e4 | 433 | { |
bd4c625c LT |
434 | struct reiserfs_journal_cnode *cn; |
435 | cn = journal_hash(table, sb, bl); | |
436 | while (cn) { | |
437 | if (cn->blocknr == bl && cn->sb == sb) | |
438 | return cn; | |
439 | cn = cn->hnext; | |
440 | } | |
441 | return (struct reiserfs_journal_cnode *)0; | |
1da177e4 LT |
442 | } |
443 | ||
444 | /* | |
445 | ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated | |
446 | ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever | |
447 | ** being overwritten by a replay after crashing. | |
448 | ** | |
449 | ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting | |
450 | ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make | |
451 | ** sure you never write the block without logging it. | |
452 | ** | |
453 | ** next_zero_bit is a suggestion about the next block to try for find_forward. | |
454 | ** when bl is rejected because it is set in a journal list bitmap, we search | |
455 | ** for the next zero bit in the bitmap that rejected bl. Then, we return that | |
456 | ** through next_zero_bit for find_forward to try. | |
457 | ** | |
458 | ** Just because we return something in next_zero_bit does not mean we won't | |
459 | ** reject it on the next call to reiserfs_in_journal | |
460 | ** | |
461 | */ | |
a9dd3643 | 462 | int reiserfs_in_journal(struct super_block *sb, |
3ee16670 | 463 | unsigned int bmap_nr, int bit_nr, int search_all, |
bd4c625c LT |
464 | b_blocknr_t * next_zero_bit) |
465 | { | |
a9dd3643 | 466 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
467 | struct reiserfs_journal_cnode *cn; |
468 | struct reiserfs_list_bitmap *jb; | |
469 | int i; | |
470 | unsigned long bl; | |
471 | ||
472 | *next_zero_bit = 0; /* always start this at zero. */ | |
473 | ||
a9dd3643 | 474 | PROC_INFO_INC(sb, journal.in_journal); |
bd4c625c LT |
475 | /* If we aren't doing a search_all, this is a metablock, and it will be logged before use. |
476 | ** if we crash before the transaction that freed it commits, this transaction won't | |
477 | ** have committed either, and the block will never be written | |
478 | */ | |
479 | if (search_all) { | |
480 | for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) { | |
a9dd3643 | 481 | PROC_INFO_INC(sb, journal.in_journal_bitmap); |
bd4c625c LT |
482 | jb = journal->j_list_bitmap + i; |
483 | if (jb->journal_list && jb->bitmaps[bmap_nr] && | |
484 | test_bit(bit_nr, | |
485 | (unsigned long *)jb->bitmaps[bmap_nr]-> | |
486 | data)) { | |
487 | *next_zero_bit = | |
488 | find_next_zero_bit((unsigned long *) | |
489 | (jb->bitmaps[bmap_nr]-> | |
490 | data), | |
a9dd3643 | 491 | sb->s_blocksize << 3, |
bd4c625c LT |
492 | bit_nr + 1); |
493 | return 1; | |
494 | } | |
495 | } | |
496 | } | |
497 | ||
a9dd3643 | 498 | bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr; |
bd4c625c LT |
499 | /* is it in any old transactions? */ |
500 | if (search_all | |
501 | && (cn = | |
a9dd3643 | 502 | get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) { |
bd4c625c LT |
503 | return 1; |
504 | } | |
505 | ||
506 | /* is it in the current transaction. This should never happen */ | |
a9dd3643 | 507 | if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) { |
bd4c625c LT |
508 | BUG(); |
509 | return 1; | |
510 | } | |
511 | ||
a9dd3643 | 512 | PROC_INFO_INC(sb, journal.in_journal_reusable); |
bd4c625c LT |
513 | /* safe for reuse */ |
514 | return 0; | |
1da177e4 LT |
515 | } |
516 | ||
517 | /* insert cn into table | |
518 | */ | |
bd4c625c LT |
519 | static inline void insert_journal_hash(struct reiserfs_journal_cnode **table, |
520 | struct reiserfs_journal_cnode *cn) | |
521 | { | |
522 | struct reiserfs_journal_cnode *cn_orig; | |
1da177e4 | 523 | |
bd4c625c LT |
524 | cn_orig = journal_hash(table, cn->sb, cn->blocknr); |
525 | cn->hnext = cn_orig; | |
526 | cn->hprev = NULL; | |
527 | if (cn_orig) { | |
528 | cn_orig->hprev = cn; | |
529 | } | |
530 | journal_hash(table, cn->sb, cn->blocknr) = cn; | |
1da177e4 LT |
531 | } |
532 | ||
533 | /* lock the current transaction */ | |
a9dd3643 | 534 | static inline void lock_journal(struct super_block *sb) |
bd4c625c | 535 | { |
a9dd3643 | 536 | PROC_INFO_INC(sb, journal.lock_journal); |
8ebc4232 FW |
537 | |
538 | reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb); | |
1da177e4 LT |
539 | } |
540 | ||
541 | /* unlock the current transaction */ | |
a9dd3643 | 542 | static inline void unlock_journal(struct super_block *sb) |
bd4c625c | 543 | { |
a9dd3643 | 544 | mutex_unlock(&SB_JOURNAL(sb)->j_mutex); |
1da177e4 LT |
545 | } |
546 | ||
547 | static inline void get_journal_list(struct reiserfs_journal_list *jl) | |
548 | { | |
bd4c625c | 549 | jl->j_refcount++; |
1da177e4 LT |
550 | } |
551 | ||
552 | static inline void put_journal_list(struct super_block *s, | |
bd4c625c | 553 | struct reiserfs_journal_list *jl) |
1da177e4 | 554 | { |
bd4c625c | 555 | if (jl->j_refcount < 1) { |
c3a9c210 | 556 | reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d", |
bd4c625c LT |
557 | jl->j_trans_id, jl->j_refcount); |
558 | } | |
559 | if (--jl->j_refcount == 0) | |
d739b42b | 560 | kfree(jl); |
1da177e4 LT |
561 | } |
562 | ||
563 | /* | |
564 | ** this used to be much more involved, and I'm keeping it just in case things get ugly again. | |
565 | ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a | |
566 | ** transaction. | |
567 | */ | |
a9dd3643 | 568 | static void cleanup_freed_for_journal_list(struct super_block *sb, |
bd4c625c LT |
569 | struct reiserfs_journal_list *jl) |
570 | { | |
1da177e4 | 571 | |
bd4c625c LT |
572 | struct reiserfs_list_bitmap *jb = jl->j_list_bitmap; |
573 | if (jb) { | |
a9dd3643 | 574 | cleanup_bitmap_list(sb, jb); |
bd4c625c LT |
575 | } |
576 | jl->j_list_bitmap->journal_list = NULL; | |
577 | jl->j_list_bitmap = NULL; | |
1da177e4 LT |
578 | } |
579 | ||
580 | static int journal_list_still_alive(struct super_block *s, | |
600ed416 | 581 | unsigned int trans_id) |
bd4c625c LT |
582 | { |
583 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
584 | struct list_head *entry = &journal->j_journal_list; | |
585 | struct reiserfs_journal_list *jl; | |
586 | ||
587 | if (!list_empty(entry)) { | |
588 | jl = JOURNAL_LIST_ENTRY(entry->next); | |
589 | if (jl->j_trans_id <= trans_id) { | |
590 | return 1; | |
591 | } | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
398c95bd CM |
596 | /* |
597 | * If page->mapping was null, we failed to truncate this page for | |
598 | * some reason. Most likely because it was truncated after being | |
599 | * logged via data=journal. | |
600 | * | |
601 | * This does a check to see if the buffer belongs to one of these | |
602 | * lost pages before doing the final put_bh. If page->mapping was | |
603 | * null, it tries to free buffers on the page, which should make the | |
604 | * final page_cache_release drop the page from the lru. | |
605 | */ | |
606 | static void release_buffer_page(struct buffer_head *bh) | |
607 | { | |
608 | struct page *page = bh->b_page; | |
529ae9aa | 609 | if (!page->mapping && trylock_page(page)) { |
398c95bd CM |
610 | page_cache_get(page); |
611 | put_bh(bh); | |
612 | if (!page->mapping) | |
613 | try_to_free_buffers(page); | |
614 | unlock_page(page); | |
615 | page_cache_release(page); | |
616 | } else { | |
617 | put_bh(bh); | |
618 | } | |
619 | } | |
620 | ||
bd4c625c LT |
621 | static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate) |
622 | { | |
623 | char b[BDEVNAME_SIZE]; | |
624 | ||
625 | if (buffer_journaled(bh)) { | |
45b03d5e JM |
626 | reiserfs_warning(NULL, "clm-2084", |
627 | "pinned buffer %lu:%s sent to disk", | |
bd4c625c LT |
628 | bh->b_blocknr, bdevname(bh->b_bdev, b)); |
629 | } | |
630 | if (uptodate) | |
631 | set_buffer_uptodate(bh); | |
632 | else | |
633 | clear_buffer_uptodate(bh); | |
398c95bd | 634 | |
bd4c625c | 635 | unlock_buffer(bh); |
398c95bd | 636 | release_buffer_page(bh); |
bd4c625c LT |
637 | } |
638 | ||
639 | static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate) | |
640 | { | |
641 | if (uptodate) | |
642 | set_buffer_uptodate(bh); | |
643 | else | |
644 | clear_buffer_uptodate(bh); | |
645 | unlock_buffer(bh); | |
646 | put_bh(bh); | |
647 | } | |
648 | ||
649 | static void submit_logged_buffer(struct buffer_head *bh) | |
650 | { | |
651 | get_bh(bh); | |
652 | bh->b_end_io = reiserfs_end_buffer_io_sync; | |
653 | clear_buffer_journal_new(bh); | |
654 | clear_buffer_dirty(bh); | |
655 | if (!test_clear_buffer_journal_test(bh)) | |
656 | BUG(); | |
657 | if (!buffer_uptodate(bh)) | |
658 | BUG(); | |
659 | submit_bh(WRITE, bh); | |
660 | } | |
661 | ||
662 | static void submit_ordered_buffer(struct buffer_head *bh) | |
663 | { | |
664 | get_bh(bh); | |
665 | bh->b_end_io = reiserfs_end_ordered_io; | |
666 | clear_buffer_dirty(bh); | |
667 | if (!buffer_uptodate(bh)) | |
668 | BUG(); | |
669 | submit_bh(WRITE, bh); | |
670 | } | |
671 | ||
1da177e4 LT |
672 | #define CHUNK_SIZE 32 |
673 | struct buffer_chunk { | |
bd4c625c LT |
674 | struct buffer_head *bh[CHUNK_SIZE]; |
675 | int nr; | |
1da177e4 LT |
676 | }; |
677 | ||
bd4c625c LT |
678 | static void write_chunk(struct buffer_chunk *chunk) |
679 | { | |
680 | int i; | |
bd4c625c LT |
681 | for (i = 0; i < chunk->nr; i++) { |
682 | submit_logged_buffer(chunk->bh[i]); | |
683 | } | |
684 | chunk->nr = 0; | |
1da177e4 LT |
685 | } |
686 | ||
bd4c625c LT |
687 | static void write_ordered_chunk(struct buffer_chunk *chunk) |
688 | { | |
689 | int i; | |
bd4c625c LT |
690 | for (i = 0; i < chunk->nr; i++) { |
691 | submit_ordered_buffer(chunk->bh[i]); | |
692 | } | |
693 | chunk->nr = 0; | |
1da177e4 LT |
694 | } |
695 | ||
696 | static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh, | |
bd4c625c | 697 | spinlock_t * lock, void (fn) (struct buffer_chunk *)) |
1da177e4 | 698 | { |
bd4c625c | 699 | int ret = 0; |
14a61442 | 700 | BUG_ON(chunk->nr >= CHUNK_SIZE); |
bd4c625c LT |
701 | chunk->bh[chunk->nr++] = bh; |
702 | if (chunk->nr >= CHUNK_SIZE) { | |
703 | ret = 1; | |
704 | if (lock) | |
705 | spin_unlock(lock); | |
706 | fn(chunk); | |
707 | if (lock) | |
708 | spin_lock(lock); | |
709 | } | |
710 | return ret; | |
1da177e4 LT |
711 | } |
712 | ||
1da177e4 | 713 | static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0); |
bd4c625c LT |
714 | static struct reiserfs_jh *alloc_jh(void) |
715 | { | |
716 | struct reiserfs_jh *jh; | |
717 | while (1) { | |
718 | jh = kmalloc(sizeof(*jh), GFP_NOFS); | |
719 | if (jh) { | |
720 | atomic_inc(&nr_reiserfs_jh); | |
721 | return jh; | |
722 | } | |
723 | yield(); | |
1da177e4 | 724 | } |
1da177e4 LT |
725 | } |
726 | ||
727 | /* | |
728 | * we want to free the jh when the buffer has been written | |
729 | * and waited on | |
730 | */ | |
bd4c625c LT |
731 | void reiserfs_free_jh(struct buffer_head *bh) |
732 | { | |
733 | struct reiserfs_jh *jh; | |
734 | ||
735 | jh = bh->b_private; | |
736 | if (jh) { | |
737 | bh->b_private = NULL; | |
738 | jh->bh = NULL; | |
739 | list_del_init(&jh->list); | |
740 | kfree(jh); | |
741 | if (atomic_read(&nr_reiserfs_jh) <= 0) | |
742 | BUG(); | |
743 | atomic_dec(&nr_reiserfs_jh); | |
744 | put_bh(bh); | |
745 | } | |
1da177e4 LT |
746 | } |
747 | ||
748 | static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh, | |
bd4c625c | 749 | int tail) |
1da177e4 | 750 | { |
bd4c625c | 751 | struct reiserfs_jh *jh; |
1da177e4 | 752 | |
bd4c625c LT |
753 | if (bh->b_private) { |
754 | spin_lock(&j->j_dirty_buffers_lock); | |
755 | if (!bh->b_private) { | |
756 | spin_unlock(&j->j_dirty_buffers_lock); | |
757 | goto no_jh; | |
758 | } | |
759 | jh = bh->b_private; | |
760 | list_del_init(&jh->list); | |
761 | } else { | |
762 | no_jh: | |
763 | get_bh(bh); | |
764 | jh = alloc_jh(); | |
765 | spin_lock(&j->j_dirty_buffers_lock); | |
766 | /* buffer must be locked for __add_jh, should be able to have | |
767 | * two adds at the same time | |
768 | */ | |
14a61442 | 769 | BUG_ON(bh->b_private); |
bd4c625c LT |
770 | jh->bh = bh; |
771 | bh->b_private = jh; | |
1da177e4 | 772 | } |
bd4c625c LT |
773 | jh->jl = j->j_current_jl; |
774 | if (tail) | |
775 | list_add_tail(&jh->list, &jh->jl->j_tail_bh_list); | |
776 | else { | |
777 | list_add_tail(&jh->list, &jh->jl->j_bh_list); | |
778 | } | |
779 | spin_unlock(&j->j_dirty_buffers_lock); | |
780 | return 0; | |
1da177e4 LT |
781 | } |
782 | ||
bd4c625c LT |
783 | int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh) |
784 | { | |
785 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1); | |
1da177e4 | 786 | } |
bd4c625c LT |
787 | int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh) |
788 | { | |
789 | return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0); | |
1da177e4 LT |
790 | } |
791 | ||
792 | #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list) | |
bd4c625c | 793 | static int write_ordered_buffers(spinlock_t * lock, |
1da177e4 | 794 | struct reiserfs_journal *j, |
bd4c625c | 795 | struct reiserfs_journal_list *jl, |
1da177e4 LT |
796 | struct list_head *list) |
797 | { | |
bd4c625c LT |
798 | struct buffer_head *bh; |
799 | struct reiserfs_jh *jh; | |
800 | int ret = j->j_errno; | |
801 | struct buffer_chunk chunk; | |
802 | struct list_head tmp; | |
803 | INIT_LIST_HEAD(&tmp); | |
804 | ||
805 | chunk.nr = 0; | |
806 | spin_lock(lock); | |
807 | while (!list_empty(list)) { | |
808 | jh = JH_ENTRY(list->next); | |
809 | bh = jh->bh; | |
810 | get_bh(bh); | |
ca5de404 | 811 | if (!trylock_buffer(bh)) { |
bd4c625c | 812 | if (!buffer_dirty(bh)) { |
f116629d | 813 | list_move(&jh->list, &tmp); |
bd4c625c LT |
814 | goto loop_next; |
815 | } | |
816 | spin_unlock(lock); | |
817 | if (chunk.nr) | |
818 | write_ordered_chunk(&chunk); | |
819 | wait_on_buffer(bh); | |
820 | cond_resched(); | |
821 | spin_lock(lock); | |
822 | goto loop_next; | |
823 | } | |
3d4492f8 CM |
824 | /* in theory, dirty non-uptodate buffers should never get here, |
825 | * but the upper layer io error paths still have a few quirks. | |
826 | * Handle them here as gracefully as we can | |
827 | */ | |
828 | if (!buffer_uptodate(bh) && buffer_dirty(bh)) { | |
829 | clear_buffer_dirty(bh); | |
830 | ret = -EIO; | |
831 | } | |
bd4c625c | 832 | if (buffer_dirty(bh)) { |
f116629d | 833 | list_move(&jh->list, &tmp); |
bd4c625c LT |
834 | add_to_chunk(&chunk, bh, lock, write_ordered_chunk); |
835 | } else { | |
836 | reiserfs_free_jh(bh); | |
837 | unlock_buffer(bh); | |
838 | } | |
839 | loop_next: | |
840 | put_bh(bh); | |
841 | cond_resched_lock(lock); | |
842 | } | |
843 | if (chunk.nr) { | |
844 | spin_unlock(lock); | |
1da177e4 | 845 | write_ordered_chunk(&chunk); |
bd4c625c | 846 | spin_lock(lock); |
1da177e4 | 847 | } |
bd4c625c LT |
848 | while (!list_empty(&tmp)) { |
849 | jh = JH_ENTRY(tmp.prev); | |
850 | bh = jh->bh; | |
851 | get_bh(bh); | |
852 | reiserfs_free_jh(bh); | |
853 | ||
854 | if (buffer_locked(bh)) { | |
855 | spin_unlock(lock); | |
856 | wait_on_buffer(bh); | |
857 | spin_lock(lock); | |
858 | } | |
859 | if (!buffer_uptodate(bh)) { | |
860 | ret = -EIO; | |
861 | } | |
d62b1b87 CM |
862 | /* ugly interaction with invalidatepage here. |
863 | * reiserfs_invalidate_page will pin any buffer that has a valid | |
864 | * journal head from an older transaction. If someone else sets | |
865 | * our buffer dirty after we write it in the first loop, and | |
866 | * then someone truncates the page away, nobody will ever write | |
867 | * the buffer. We're safe if we write the page one last time | |
868 | * after freeing the journal header. | |
869 | */ | |
870 | if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) { | |
871 | spin_unlock(lock); | |
872 | ll_rw_block(WRITE, 1, &bh); | |
873 | spin_lock(lock); | |
874 | } | |
bd4c625c LT |
875 | put_bh(bh); |
876 | cond_resched_lock(lock); | |
1da177e4 | 877 | } |
bd4c625c LT |
878 | spin_unlock(lock); |
879 | return ret; | |
880 | } | |
1da177e4 | 881 | |
bd4c625c LT |
882 | static int flush_older_commits(struct super_block *s, |
883 | struct reiserfs_journal_list *jl) | |
884 | { | |
885 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
886 | struct reiserfs_journal_list *other_jl; | |
887 | struct reiserfs_journal_list *first_jl; | |
888 | struct list_head *entry; | |
600ed416 JM |
889 | unsigned int trans_id = jl->j_trans_id; |
890 | unsigned int other_trans_id; | |
891 | unsigned int first_trans_id; | |
bd4c625c LT |
892 | |
893 | find_first: | |
894 | /* | |
895 | * first we walk backwards to find the oldest uncommitted transation | |
896 | */ | |
897 | first_jl = jl; | |
898 | entry = jl->j_list.prev; | |
899 | while (1) { | |
900 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
901 | if (entry == &journal->j_journal_list || | |
902 | atomic_read(&other_jl->j_older_commits_done)) | |
903 | break; | |
1da177e4 | 904 | |
bd4c625c LT |
905 | first_jl = other_jl; |
906 | entry = other_jl->j_list.prev; | |
907 | } | |
1da177e4 | 908 | |
bd4c625c LT |
909 | /* if we didn't find any older uncommitted transactions, return now */ |
910 | if (first_jl == jl) { | |
911 | return 0; | |
912 | } | |
1da177e4 | 913 | |
bd4c625c LT |
914 | first_trans_id = first_jl->j_trans_id; |
915 | ||
916 | entry = &first_jl->j_list; | |
917 | while (1) { | |
918 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
919 | other_trans_id = other_jl->j_trans_id; | |
920 | ||
921 | if (other_trans_id < trans_id) { | |
922 | if (atomic_read(&other_jl->j_commit_left) != 0) { | |
923 | flush_commit_list(s, other_jl, 0); | |
924 | ||
925 | /* list we were called with is gone, return */ | |
926 | if (!journal_list_still_alive(s, trans_id)) | |
927 | return 1; | |
928 | ||
929 | /* the one we just flushed is gone, this means all | |
930 | * older lists are also gone, so first_jl is no longer | |
931 | * valid either. Go back to the beginning. | |
932 | */ | |
933 | if (!journal_list_still_alive | |
934 | (s, other_trans_id)) { | |
935 | goto find_first; | |
936 | } | |
937 | } | |
938 | entry = entry->next; | |
939 | if (entry == &journal->j_journal_list) | |
940 | return 0; | |
941 | } else { | |
942 | return 0; | |
1da177e4 | 943 | } |
1da177e4 | 944 | } |
bd4c625c | 945 | return 0; |
1da177e4 | 946 | } |
deba0f49 AB |
947 | |
948 | static int reiserfs_async_progress_wait(struct super_block *s) | |
bd4c625c | 949 | { |
bd4c625c | 950 | struct reiserfs_journal *j = SB_JOURNAL(s); |
8ebc4232 FW |
951 | |
952 | if (atomic_read(&j->j_async_throttle)) { | |
953 | reiserfs_write_unlock(s); | |
8aa7e847 | 954 | congestion_wait(BLK_RW_ASYNC, HZ / 10); |
8ebc4232 FW |
955 | reiserfs_write_lock(s); |
956 | } | |
957 | ||
bd4c625c | 958 | return 0; |
1da177e4 LT |
959 | } |
960 | ||
961 | /* | |
962 | ** if this journal list still has commit blocks unflushed, send them to disk. | |
963 | ** | |
964 | ** log areas must be flushed in order (transaction 2 can't commit before transaction 1) | |
965 | ** Before the commit block can by written, every other log block must be safely on disk | |
966 | ** | |
967 | */ | |
bd4c625c LT |
968 | static int flush_commit_list(struct super_block *s, |
969 | struct reiserfs_journal_list *jl, int flushall) | |
970 | { | |
971 | int i; | |
3ee16670 | 972 | b_blocknr_t bn; |
bd4c625c | 973 | struct buffer_head *tbh = NULL; |
600ed416 | 974 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c | 975 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
bd4c625c | 976 | int retval = 0; |
e0e851cf | 977 | int write_len; |
bd4c625c LT |
978 | |
979 | reiserfs_check_lock_depth(s, "flush_commit_list"); | |
980 | ||
981 | if (atomic_read(&jl->j_older_commits_done)) { | |
982 | return 0; | |
983 | } | |
984 | ||
bd4c625c LT |
985 | /* before we can put our commit blocks on disk, we have to make sure everyone older than |
986 | ** us is on disk too | |
987 | */ | |
988 | BUG_ON(jl->j_len <= 0); | |
989 | BUG_ON(trans_id == journal->j_trans_id); | |
990 | ||
991 | get_journal_list(jl); | |
992 | if (flushall) { | |
993 | if (flush_older_commits(s, jl) == 1) { | |
994 | /* list disappeared during flush_older_commits. return */ | |
995 | goto put_jl; | |
996 | } | |
997 | } | |
998 | ||
999 | /* make sure nobody is trying to flush this one at the same time */ | |
8ebc4232 FW |
1000 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s); |
1001 | ||
bd4c625c | 1002 | if (!journal_list_still_alive(s, trans_id)) { |
90415dea | 1003 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1004 | goto put_jl; |
1005 | } | |
1006 | BUG_ON(jl->j_trans_id == 0); | |
1007 | ||
1008 | /* this commit is done, exit */ | |
1009 | if (atomic_read(&(jl->j_commit_left)) <= 0) { | |
1010 | if (flushall) { | |
1011 | atomic_set(&(jl->j_older_commits_done), 1); | |
1012 | } | |
90415dea | 1013 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1014 | goto put_jl; |
1015 | } | |
1016 | ||
1017 | if (!list_empty(&jl->j_bh_list)) { | |
3d4492f8 | 1018 | int ret; |
8ebc4232 FW |
1019 | |
1020 | /* | |
1021 | * We might sleep in numerous places inside | |
1022 | * write_ordered_buffers. Relax the write lock. | |
1023 | */ | |
1024 | reiserfs_write_unlock(s); | |
3d4492f8 CM |
1025 | ret = write_ordered_buffers(&journal->j_dirty_buffers_lock, |
1026 | journal, jl, &jl->j_bh_list); | |
1027 | if (ret < 0 && retval == 0) | |
1028 | retval = ret; | |
8ebc4232 | 1029 | reiserfs_write_lock(s); |
bd4c625c LT |
1030 | } |
1031 | BUG_ON(!list_empty(&jl->j_bh_list)); | |
1032 | /* | |
1033 | * for the description block and all the log blocks, submit any buffers | |
e0e851cf CM |
1034 | * that haven't already reached the disk. Try to write at least 256 |
1035 | * log blocks. later on, we will only wait on blocks that correspond | |
1036 | * to this transaction, but while we're unplugging we might as well | |
1037 | * get a chunk of data on there. | |
bd4c625c LT |
1038 | */ |
1039 | atomic_inc(&journal->j_async_throttle); | |
e0e851cf CM |
1040 | write_len = jl->j_len + 1; |
1041 | if (write_len < 256) | |
1042 | write_len = 256; | |
1043 | for (i = 0 ; i < write_len ; i++) { | |
bd4c625c LT |
1044 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) % |
1045 | SB_ONDISK_JOURNAL_SIZE(s); | |
1046 | tbh = journal_find_get_block(s, bn); | |
e0e851cf | 1047 | if (tbh) { |
6e3647ac FW |
1048 | if (buffer_dirty(tbh)) { |
1049 | reiserfs_write_unlock(s); | |
1050 | ll_rw_block(WRITE, 1, &tbh); | |
1051 | reiserfs_write_lock(s); | |
1052 | } | |
e0e851cf CM |
1053 | put_bh(tbh) ; |
1054 | } | |
bd4c625c LT |
1055 | } |
1056 | atomic_dec(&journal->j_async_throttle); | |
1057 | ||
bd4c625c LT |
1058 | for (i = 0; i < (jl->j_len + 1); i++) { |
1059 | bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + | |
1060 | (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s); | |
1061 | tbh = journal_find_get_block(s, bn); | |
8ebc4232 FW |
1062 | |
1063 | reiserfs_write_unlock(s); | |
bd4c625c | 1064 | wait_on_buffer(tbh); |
8ebc4232 | 1065 | reiserfs_write_lock(s); |
bd4c625c LT |
1066 | // since we're using ll_rw_blk above, it might have skipped over |
1067 | // a locked buffer. Double check here | |
1068 | // | |
8ebc4232 FW |
1069 | /* redundant, sync_dirty_buffer() checks */ |
1070 | if (buffer_dirty(tbh)) { | |
1071 | reiserfs_write_unlock(s); | |
bd4c625c | 1072 | sync_dirty_buffer(tbh); |
8ebc4232 FW |
1073 | reiserfs_write_lock(s); |
1074 | } | |
bd4c625c | 1075 | if (unlikely(!buffer_uptodate(tbh))) { |
1da177e4 | 1076 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e JM |
1077 | reiserfs_warning(s, "journal-601", |
1078 | "buffer write failed"); | |
1da177e4 | 1079 | #endif |
bd4c625c LT |
1080 | retval = -EIO; |
1081 | } | |
1082 | put_bh(tbh); /* once for journal_find_get_block */ | |
1083 | put_bh(tbh); /* once due to original getblk in do_journal_end */ | |
1084 | atomic_dec(&(jl->j_commit_left)); | |
1085 | } | |
1086 | ||
1087 | BUG_ON(atomic_read(&(jl->j_commit_left)) != 1); | |
1088 | ||
7cd33ad2 CH |
1089 | /* If there was a write error in the journal - we can't commit |
1090 | * this transaction - it will be invalid and, if successful, | |
1091 | * will just end up propagating the write error out to | |
1092 | * the file system. */ | |
1093 | if (likely(!retval && !reiserfs_is_journal_aborted (journal))) { | |
1094 | if (buffer_dirty(jl->j_commit_bh)) | |
1095 | BUG(); | |
1096 | mark_buffer_dirty(jl->j_commit_bh) ; | |
8ebc4232 | 1097 | reiserfs_write_unlock(s); |
7cd33ad2 CH |
1098 | if (reiserfs_barrier_flush(s)) |
1099 | __sync_dirty_buffer(jl->j_commit_bh, WRITE_FLUSH_FUA); | |
1100 | else | |
1101 | sync_dirty_buffer(jl->j_commit_bh); | |
8ebc4232 FW |
1102 | reiserfs_write_lock(s); |
1103 | } | |
bd4c625c | 1104 | |
bd4c625c LT |
1105 | /* If there was a write error in the journal - we can't commit this |
1106 | * transaction - it will be invalid and, if successful, will just end | |
beb7dd86 | 1107 | * up propagating the write error out to the filesystem. */ |
bd4c625c | 1108 | if (unlikely(!buffer_uptodate(jl->j_commit_bh))) { |
1da177e4 | 1109 | #ifdef CONFIG_REISERFS_CHECK |
45b03d5e | 1110 | reiserfs_warning(s, "journal-615", "buffer write failed"); |
1da177e4 | 1111 | #endif |
bd4c625c LT |
1112 | retval = -EIO; |
1113 | } | |
1114 | bforget(jl->j_commit_bh); | |
1115 | if (journal->j_last_commit_id != 0 && | |
1116 | (jl->j_trans_id - journal->j_last_commit_id) != 1) { | |
45b03d5e | 1117 | reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu", |
bd4c625c LT |
1118 | journal->j_last_commit_id, jl->j_trans_id); |
1119 | } | |
1120 | journal->j_last_commit_id = jl->j_trans_id; | |
1121 | ||
1122 | /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */ | |
1123 | cleanup_freed_for_journal_list(s, jl); | |
1124 | ||
1125 | retval = retval ? retval : journal->j_errno; | |
1126 | ||
1127 | /* mark the metadata dirty */ | |
1128 | if (!retval) | |
1129 | dirty_one_transaction(s, jl); | |
1130 | atomic_dec(&(jl->j_commit_left)); | |
1131 | ||
1132 | if (flushall) { | |
1133 | atomic_set(&(jl->j_older_commits_done), 1); | |
1134 | } | |
90415dea | 1135 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
1136 | put_jl: |
1137 | put_journal_list(s, jl); | |
1138 | ||
1139 | if (retval) | |
1140 | reiserfs_abort(s, retval, "Journal write error in %s", | |
fbe5498b | 1141 | __func__); |
bd4c625c | 1142 | return retval; |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | /* | |
0222e657 JM |
1146 | ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or |
1147 | ** returns NULL if it can't find anything | |
1da177e4 | 1148 | */ |
bd4c625c LT |
1149 | static struct reiserfs_journal_list *find_newer_jl_for_cn(struct |
1150 | reiserfs_journal_cnode | |
1151 | *cn) | |
1152 | { | |
1153 | struct super_block *sb = cn->sb; | |
1154 | b_blocknr_t blocknr = cn->blocknr; | |
1da177e4 | 1155 | |
bd4c625c LT |
1156 | cn = cn->hprev; |
1157 | while (cn) { | |
1158 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) { | |
1159 | return cn->jlist; | |
1160 | } | |
1161 | cn = cn->hprev; | |
1162 | } | |
1163 | return NULL; | |
1da177e4 LT |
1164 | } |
1165 | ||
a3172027 CM |
1166 | static int newer_jl_done(struct reiserfs_journal_cnode *cn) |
1167 | { | |
1168 | struct super_block *sb = cn->sb; | |
1169 | b_blocknr_t blocknr = cn->blocknr; | |
1170 | ||
1171 | cn = cn->hprev; | |
1172 | while (cn) { | |
1173 | if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist && | |
1174 | atomic_read(&cn->jlist->j_commit_left) != 0) | |
1175 | return 0; | |
1176 | cn = cn->hprev; | |
1177 | } | |
1178 | return 1; | |
1179 | } | |
1180 | ||
bd4c625c LT |
1181 | static void remove_journal_hash(struct super_block *, |
1182 | struct reiserfs_journal_cnode **, | |
1183 | struct reiserfs_journal_list *, unsigned long, | |
1184 | int); | |
1da177e4 LT |
1185 | |
1186 | /* | |
1187 | ** once all the real blocks have been flushed, it is safe to remove them from the | |
1188 | ** journal list for this transaction. Aside from freeing the cnode, this also allows the | |
1189 | ** block to be reallocated for data blocks if it had been deleted. | |
1190 | */ | |
a9dd3643 | 1191 | static void remove_all_from_journal_list(struct super_block *sb, |
bd4c625c LT |
1192 | struct reiserfs_journal_list *jl, |
1193 | int debug) | |
1194 | { | |
a9dd3643 | 1195 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1196 | struct reiserfs_journal_cnode *cn, *last; |
1197 | cn = jl->j_realblock; | |
1198 | ||
1199 | /* which is better, to lock once around the whole loop, or | |
1200 | ** to lock for each call to remove_journal_hash? | |
1201 | */ | |
1202 | while (cn) { | |
1203 | if (cn->blocknr != 0) { | |
1204 | if (debug) { | |
a9dd3643 | 1205 | reiserfs_warning(sb, "reiserfs-2201", |
bd4c625c LT |
1206 | "block %u, bh is %d, state %ld", |
1207 | cn->blocknr, cn->bh ? 1 : 0, | |
1208 | cn->state); | |
1209 | } | |
1210 | cn->state = 0; | |
a9dd3643 | 1211 | remove_journal_hash(sb, journal->j_list_hash_table, |
bd4c625c LT |
1212 | jl, cn->blocknr, 1); |
1213 | } | |
1214 | last = cn; | |
1215 | cn = cn->next; | |
a9dd3643 | 1216 | free_cnode(sb, last); |
bd4c625c LT |
1217 | } |
1218 | jl->j_realblock = NULL; | |
1da177e4 LT |
1219 | } |
1220 | ||
1221 | /* | |
1222 | ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block. | |
1223 | ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start | |
1224 | ** releasing blocks in this transaction for reuse as data blocks. | |
1225 | ** called by flush_journal_list, before it calls remove_all_from_journal_list | |
1226 | ** | |
1227 | */ | |
a9dd3643 | 1228 | static int _update_journal_header_block(struct super_block *sb, |
bd4c625c | 1229 | unsigned long offset, |
600ed416 | 1230 | unsigned int trans_id) |
bd4c625c LT |
1231 | { |
1232 | struct reiserfs_journal_header *jh; | |
a9dd3643 | 1233 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 1234 | |
bd4c625c LT |
1235 | if (reiserfs_is_journal_aborted(journal)) |
1236 | return -EIO; | |
1da177e4 | 1237 | |
bd4c625c LT |
1238 | if (trans_id >= journal->j_last_flush_trans_id) { |
1239 | if (buffer_locked((journal->j_header_bh))) { | |
8ebc4232 | 1240 | reiserfs_write_unlock(sb); |
bd4c625c | 1241 | wait_on_buffer((journal->j_header_bh)); |
8ebc4232 | 1242 | reiserfs_write_lock(sb); |
bd4c625c | 1243 | if (unlikely(!buffer_uptodate(journal->j_header_bh))) { |
1da177e4 | 1244 | #ifdef CONFIG_REISERFS_CHECK |
a9dd3643 | 1245 | reiserfs_warning(sb, "journal-699", |
45b03d5e | 1246 | "buffer write failed"); |
1da177e4 | 1247 | #endif |
bd4c625c LT |
1248 | return -EIO; |
1249 | } | |
1250 | } | |
1251 | journal->j_last_flush_trans_id = trans_id; | |
1252 | journal->j_first_unflushed_offset = offset; | |
1253 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh-> | |
1254 | b_data); | |
1255 | jh->j_last_flush_trans_id = cpu_to_le32(trans_id); | |
1256 | jh->j_first_unflushed_offset = cpu_to_le32(offset); | |
1257 | jh->j_mount_id = cpu_to_le32(journal->j_mount_id); | |
1258 | ||
7cd33ad2 CH |
1259 | set_buffer_dirty(journal->j_header_bh); |
1260 | reiserfs_write_unlock(sb); | |
1261 | ||
1262 | if (reiserfs_barrier_flush(sb)) | |
1263 | __sync_dirty_buffer(journal->j_header_bh, WRITE_FLUSH_FUA); | |
1264 | else | |
bd4c625c | 1265 | sync_dirty_buffer(journal->j_header_bh); |
7cd33ad2 CH |
1266 | |
1267 | reiserfs_write_lock(sb); | |
bd4c625c | 1268 | if (!buffer_uptodate(journal->j_header_bh)) { |
a9dd3643 | 1269 | reiserfs_warning(sb, "journal-837", |
45b03d5e | 1270 | "IO error during journal replay"); |
bd4c625c LT |
1271 | return -EIO; |
1272 | } | |
1273 | } | |
1274 | return 0; | |
1275 | } | |
1276 | ||
a9dd3643 | 1277 | static int update_journal_header_block(struct super_block *sb, |
bd4c625c | 1278 | unsigned long offset, |
600ed416 | 1279 | unsigned int trans_id) |
bd4c625c | 1280 | { |
a9dd3643 | 1281 | return _update_journal_header_block(sb, offset, trans_id); |
1da177e4 | 1282 | } |
bd4c625c | 1283 | |
0222e657 JM |
1284 | /* |
1285 | ** flush any and all journal lists older than you are | |
1da177e4 LT |
1286 | ** can only be called from flush_journal_list |
1287 | */ | |
a9dd3643 | 1288 | static int flush_older_journal_lists(struct super_block *sb, |
bd4c625c LT |
1289 | struct reiserfs_journal_list *jl) |
1290 | { | |
1291 | struct list_head *entry; | |
1292 | struct reiserfs_journal_list *other_jl; | |
a9dd3643 | 1293 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
600ed416 | 1294 | unsigned int trans_id = jl->j_trans_id; |
bd4c625c LT |
1295 | |
1296 | /* we know we are the only ones flushing things, no extra race | |
1297 | * protection is required. | |
1298 | */ | |
1299 | restart: | |
1300 | entry = journal->j_journal_list.next; | |
1301 | /* Did we wrap? */ | |
1302 | if (entry == &journal->j_journal_list) | |
1303 | return 0; | |
1304 | other_jl = JOURNAL_LIST_ENTRY(entry); | |
1305 | if (other_jl->j_trans_id < trans_id) { | |
1306 | BUG_ON(other_jl->j_refcount <= 0); | |
1307 | /* do not flush all */ | |
a9dd3643 | 1308 | flush_journal_list(sb, other_jl, 0); |
bd4c625c LT |
1309 | |
1310 | /* other_jl is now deleted from the list */ | |
1311 | goto restart; | |
1312 | } | |
1313 | return 0; | |
1da177e4 LT |
1314 | } |
1315 | ||
1316 | static void del_from_work_list(struct super_block *s, | |
bd4c625c LT |
1317 | struct reiserfs_journal_list *jl) |
1318 | { | |
1319 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1320 | if (!list_empty(&jl->j_working_list)) { | |
1321 | list_del_init(&jl->j_working_list); | |
1322 | journal->j_num_work_lists--; | |
1323 | } | |
1da177e4 LT |
1324 | } |
1325 | ||
1326 | /* flush a journal list, both commit and real blocks | |
1327 | ** | |
1328 | ** always set flushall to 1, unless you are calling from inside | |
1329 | ** flush_journal_list | |
1330 | ** | |
0222e657 JM |
1331 | ** IMPORTANT. This can only be called while there are no journal writers, |
1332 | ** and the journal is locked. That means it can only be called from | |
1da177e4 LT |
1333 | ** do_journal_end, or by journal_release |
1334 | */ | |
bd4c625c LT |
1335 | static int flush_journal_list(struct super_block *s, |
1336 | struct reiserfs_journal_list *jl, int flushall) | |
1da177e4 | 1337 | { |
bd4c625c LT |
1338 | struct reiserfs_journal_list *pjl; |
1339 | struct reiserfs_journal_cnode *cn, *last; | |
1340 | int count; | |
1341 | int was_jwait = 0; | |
1342 | int was_dirty = 0; | |
1343 | struct buffer_head *saved_bh; | |
1344 | unsigned long j_len_saved = jl->j_len; | |
1345 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1346 | int err = 0; | |
1347 | ||
1348 | BUG_ON(j_len_saved <= 0); | |
1349 | ||
1350 | if (atomic_read(&journal->j_wcount) != 0) { | |
45b03d5e | 1351 | reiserfs_warning(s, "clm-2048", "called with wcount %d", |
bd4c625c LT |
1352 | atomic_read(&journal->j_wcount)); |
1353 | } | |
1354 | BUG_ON(jl->j_trans_id == 0); | |
1da177e4 | 1355 | |
bd4c625c LT |
1356 | /* if flushall == 0, the lock is already held */ |
1357 | if (flushall) { | |
8ebc4232 | 1358 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
afe70259 | 1359 | } else if (mutex_trylock(&journal->j_flush_mutex)) { |
bd4c625c LT |
1360 | BUG(); |
1361 | } | |
1da177e4 | 1362 | |
bd4c625c LT |
1363 | count = 0; |
1364 | if (j_len_saved > journal->j_trans_max) { | |
c3a9c210 | 1365 | reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu", |
bd4c625c LT |
1366 | j_len_saved, jl->j_trans_id); |
1367 | return 0; | |
1368 | } | |
1da177e4 | 1369 | |
bd4c625c LT |
1370 | /* if all the work is already done, get out of here */ |
1371 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1372 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1373 | goto flush_older_and_return; | |
1374 | } | |
1375 | ||
0222e657 | 1376 | /* start by putting the commit list on disk. This will also flush |
bd4c625c LT |
1377 | ** the commit lists of any olders transactions |
1378 | */ | |
1379 | flush_commit_list(s, jl, 1); | |
1380 | ||
1381 | if (!(jl->j_state & LIST_DIRTY) | |
1382 | && !reiserfs_is_journal_aborted(journal)) | |
1383 | BUG(); | |
1384 | ||
1385 | /* are we done now? */ | |
1386 | if (atomic_read(&(jl->j_nonzerolen)) <= 0 && | |
1387 | atomic_read(&(jl->j_commit_left)) <= 0) { | |
1388 | goto flush_older_and_return; | |
1389 | } | |
1390 | ||
0222e657 JM |
1391 | /* loop through each cnode, see if we need to write it, |
1392 | ** or wait on a more recent transaction, or just ignore it | |
bd4c625c LT |
1393 | */ |
1394 | if (atomic_read(&(journal->j_wcount)) != 0) { | |
c3a9c210 JM |
1395 | reiserfs_panic(s, "journal-844", "journal list is flushing, " |
1396 | "wcount is not 0"); | |
bd4c625c LT |
1397 | } |
1398 | cn = jl->j_realblock; | |
1399 | while (cn) { | |
1400 | was_jwait = 0; | |
1401 | was_dirty = 0; | |
1402 | saved_bh = NULL; | |
1403 | /* blocknr of 0 is no longer in the hash, ignore it */ | |
1404 | if (cn->blocknr == 0) { | |
1405 | goto free_cnode; | |
1406 | } | |
1407 | ||
1408 | /* This transaction failed commit. Don't write out to the disk */ | |
1409 | if (!(jl->j_state & LIST_DIRTY)) | |
1410 | goto free_cnode; | |
1411 | ||
1412 | pjl = find_newer_jl_for_cn(cn); | |
1413 | /* the order is important here. We check pjl to make sure we | |
1414 | ** don't clear BH_JDirty_wait if we aren't the one writing this | |
1415 | ** block to disk | |
1416 | */ | |
1417 | if (!pjl && cn->bh) { | |
1418 | saved_bh = cn->bh; | |
1419 | ||
0222e657 JM |
1420 | /* we do this to make sure nobody releases the buffer while |
1421 | ** we are working with it | |
bd4c625c LT |
1422 | */ |
1423 | get_bh(saved_bh); | |
1424 | ||
1425 | if (buffer_journal_dirty(saved_bh)) { | |
1426 | BUG_ON(!can_dirty(cn)); | |
1427 | was_jwait = 1; | |
1428 | was_dirty = 1; | |
1429 | } else if (can_dirty(cn)) { | |
1430 | /* everything with !pjl && jwait should be writable */ | |
1431 | BUG(); | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* if someone has this block in a newer transaction, just make | |
0779bf2d | 1436 | ** sure they are committed, and don't try writing it to disk |
bd4c625c LT |
1437 | */ |
1438 | if (pjl) { | |
1439 | if (atomic_read(&pjl->j_commit_left)) | |
1440 | flush_commit_list(s, pjl, 1); | |
1441 | goto free_cnode; | |
1442 | } | |
1443 | ||
0222e657 JM |
1444 | /* bh == NULL when the block got to disk on its own, OR, |
1445 | ** the block got freed in a future transaction | |
bd4c625c LT |
1446 | */ |
1447 | if (saved_bh == NULL) { | |
1448 | goto free_cnode; | |
1449 | } | |
1450 | ||
1451 | /* this should never happen. kupdate_one_transaction has this list | |
1452 | ** locked while it works, so we should never see a buffer here that | |
1453 | ** is not marked JDirty_wait | |
1454 | */ | |
1455 | if ((!was_jwait) && !buffer_locked(saved_bh)) { | |
45b03d5e JM |
1456 | reiserfs_warning(s, "journal-813", |
1457 | "BAD! buffer %llu %cdirty %cjwait, " | |
bd4c625c LT |
1458 | "not in a newer tranasction", |
1459 | (unsigned long long)saved_bh-> | |
1460 | b_blocknr, was_dirty ? ' ' : '!', | |
1461 | was_jwait ? ' ' : '!'); | |
1462 | } | |
1463 | if (was_dirty) { | |
1464 | /* we inc again because saved_bh gets decremented at free_cnode */ | |
1465 | get_bh(saved_bh); | |
1466 | set_bit(BLOCK_NEEDS_FLUSH, &cn->state); | |
1467 | lock_buffer(saved_bh); | |
1468 | BUG_ON(cn->blocknr != saved_bh->b_blocknr); | |
1469 | if (buffer_dirty(saved_bh)) | |
1470 | submit_logged_buffer(saved_bh); | |
1471 | else | |
1472 | unlock_buffer(saved_bh); | |
1473 | count++; | |
1474 | } else { | |
45b03d5e JM |
1475 | reiserfs_warning(s, "clm-2082", |
1476 | "Unable to flush buffer %llu in %s", | |
bd4c625c | 1477 | (unsigned long long)saved_bh-> |
fbe5498b | 1478 | b_blocknr, __func__); |
bd4c625c LT |
1479 | } |
1480 | free_cnode: | |
1481 | last = cn; | |
1482 | cn = cn->next; | |
1483 | if (saved_bh) { | |
1484 | /* we incremented this to keep others from taking the buffer head away */ | |
1485 | put_bh(saved_bh); | |
1486 | if (atomic_read(&(saved_bh->b_count)) < 0) { | |
45b03d5e JM |
1487 | reiserfs_warning(s, "journal-945", |
1488 | "saved_bh->b_count < 0"); | |
bd4c625c LT |
1489 | } |
1490 | } | |
1491 | } | |
1492 | if (count > 0) { | |
1493 | cn = jl->j_realblock; | |
1494 | while (cn) { | |
1495 | if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) { | |
1496 | if (!cn->bh) { | |
c3a9c210 JM |
1497 | reiserfs_panic(s, "journal-1011", |
1498 | "cn->bh is NULL"); | |
bd4c625c | 1499 | } |
8ebc4232 FW |
1500 | |
1501 | reiserfs_write_unlock(s); | |
bd4c625c | 1502 | wait_on_buffer(cn->bh); |
8ebc4232 FW |
1503 | reiserfs_write_lock(s); |
1504 | ||
bd4c625c | 1505 | if (!cn->bh) { |
c3a9c210 JM |
1506 | reiserfs_panic(s, "journal-1012", |
1507 | "cn->bh is NULL"); | |
bd4c625c LT |
1508 | } |
1509 | if (unlikely(!buffer_uptodate(cn->bh))) { | |
1510 | #ifdef CONFIG_REISERFS_CHECK | |
45b03d5e JM |
1511 | reiserfs_warning(s, "journal-949", |
1512 | "buffer write failed"); | |
bd4c625c LT |
1513 | #endif |
1514 | err = -EIO; | |
1515 | } | |
1516 | /* note, we must clear the JDirty_wait bit after the up to date | |
1517 | ** check, otherwise we race against our flushpage routine | |
1518 | */ | |
1519 | BUG_ON(!test_clear_buffer_journal_dirty | |
1520 | (cn->bh)); | |
1521 | ||
398c95bd | 1522 | /* drop one ref for us */ |
bd4c625c | 1523 | put_bh(cn->bh); |
398c95bd CM |
1524 | /* drop one ref for journal_mark_dirty */ |
1525 | release_buffer_page(cn->bh); | |
bd4c625c LT |
1526 | } |
1527 | cn = cn->next; | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | if (err) | |
1532 | reiserfs_abort(s, -EIO, | |
1533 | "Write error while pushing transaction to disk in %s", | |
fbe5498b | 1534 | __func__); |
bd4c625c LT |
1535 | flush_older_and_return: |
1536 | ||
0222e657 | 1537 | /* before we can update the journal header block, we _must_ flush all |
bd4c625c LT |
1538 | ** real blocks from all older transactions to disk. This is because |
1539 | ** once the header block is updated, this transaction will not be | |
1540 | ** replayed after a crash | |
1541 | */ | |
1542 | if (flushall) { | |
1543 | flush_older_journal_lists(s, jl); | |
1544 | } | |
1545 | ||
1546 | err = journal->j_errno; | |
0222e657 | 1547 | /* before we can remove everything from the hash tables for this |
bd4c625c LT |
1548 | ** transaction, we must make sure it can never be replayed |
1549 | ** | |
1550 | ** since we are only called from do_journal_end, we know for sure there | |
1551 | ** are no allocations going on while we are flushing journal lists. So, | |
1552 | ** we only need to update the journal header block for the last list | |
1553 | ** being flushed | |
1554 | */ | |
1555 | if (!err && flushall) { | |
1556 | err = | |
1557 | update_journal_header_block(s, | |
1558 | (jl->j_start + jl->j_len + | |
1559 | 2) % SB_ONDISK_JOURNAL_SIZE(s), | |
1560 | jl->j_trans_id); | |
1561 | if (err) | |
1562 | reiserfs_abort(s, -EIO, | |
1563 | "Write error while updating journal header in %s", | |
fbe5498b | 1564 | __func__); |
bd4c625c LT |
1565 | } |
1566 | remove_all_from_journal_list(s, jl, 0); | |
1567 | list_del_init(&jl->j_list); | |
1568 | journal->j_num_lists--; | |
1569 | del_from_work_list(s, jl); | |
1570 | ||
1571 | if (journal->j_last_flush_id != 0 && | |
1572 | (jl->j_trans_id - journal->j_last_flush_id) != 1) { | |
45b03d5e | 1573 | reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu", |
bd4c625c LT |
1574 | journal->j_last_flush_id, jl->j_trans_id); |
1575 | } | |
1576 | journal->j_last_flush_id = jl->j_trans_id; | |
1577 | ||
1578 | /* not strictly required since we are freeing the list, but it should | |
1579 | * help find code using dead lists later on | |
1580 | */ | |
1581 | jl->j_len = 0; | |
1582 | atomic_set(&(jl->j_nonzerolen), 0); | |
1583 | jl->j_start = 0; | |
1584 | jl->j_realblock = NULL; | |
1585 | jl->j_commit_bh = NULL; | |
1586 | jl->j_trans_id = 0; | |
1587 | jl->j_state = 0; | |
1588 | put_journal_list(s, jl); | |
1589 | if (flushall) | |
afe70259 | 1590 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1591 | return err; |
1592 | } | |
1593 | ||
a3172027 CM |
1594 | static int test_transaction(struct super_block *s, |
1595 | struct reiserfs_journal_list *jl) | |
1596 | { | |
1597 | struct reiserfs_journal_cnode *cn; | |
1598 | ||
1599 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) | |
1600 | return 1; | |
1601 | ||
1602 | cn = jl->j_realblock; | |
1603 | while (cn) { | |
1604 | /* if the blocknr == 0, this has been cleared from the hash, | |
1605 | ** skip it | |
1606 | */ | |
1607 | if (cn->blocknr == 0) { | |
1608 | goto next; | |
1609 | } | |
1610 | if (cn->bh && !newer_jl_done(cn)) | |
1611 | return 0; | |
1612 | next: | |
1613 | cn = cn->next; | |
1614 | cond_resched(); | |
1615 | } | |
1616 | return 0; | |
1617 | } | |
1618 | ||
bd4c625c LT |
1619 | static int write_one_transaction(struct super_block *s, |
1620 | struct reiserfs_journal_list *jl, | |
1621 | struct buffer_chunk *chunk) | |
1622 | { | |
1623 | struct reiserfs_journal_cnode *cn; | |
1624 | int ret = 0; | |
1625 | ||
1626 | jl->j_state |= LIST_TOUCHED; | |
1627 | del_from_work_list(s, jl); | |
1628 | if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) { | |
1629 | return 0; | |
1630 | } | |
1631 | ||
1632 | cn = jl->j_realblock; | |
1633 | while (cn) { | |
1634 | /* if the blocknr == 0, this has been cleared from the hash, | |
1635 | ** skip it | |
1636 | */ | |
1637 | if (cn->blocknr == 0) { | |
1638 | goto next; | |
1639 | } | |
1640 | if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) { | |
1641 | struct buffer_head *tmp_bh; | |
1642 | /* we can race against journal_mark_freed when we try | |
1643 | * to lock_buffer(cn->bh), so we have to inc the buffer | |
1644 | * count, and recheck things after locking | |
1645 | */ | |
1646 | tmp_bh = cn->bh; | |
1647 | get_bh(tmp_bh); | |
1648 | lock_buffer(tmp_bh); | |
1649 | if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) { | |
1650 | if (!buffer_journal_dirty(tmp_bh) || | |
1651 | buffer_journal_prepared(tmp_bh)) | |
1652 | BUG(); | |
1653 | add_to_chunk(chunk, tmp_bh, NULL, write_chunk); | |
1654 | ret++; | |
1655 | } else { | |
1656 | /* note, cn->bh might be null now */ | |
1657 | unlock_buffer(tmp_bh); | |
1658 | } | |
1659 | put_bh(tmp_bh); | |
1660 | } | |
1661 | next: | |
1662 | cn = cn->next; | |
1663 | cond_resched(); | |
1664 | } | |
1665 | return ret; | |
1666 | } | |
1667 | ||
1668 | /* used by flush_commit_list */ | |
1669 | static int dirty_one_transaction(struct super_block *s, | |
1670 | struct reiserfs_journal_list *jl) | |
1671 | { | |
1672 | struct reiserfs_journal_cnode *cn; | |
1673 | struct reiserfs_journal_list *pjl; | |
1674 | int ret = 0; | |
1675 | ||
1676 | jl->j_state |= LIST_DIRTY; | |
1677 | cn = jl->j_realblock; | |
1678 | while (cn) { | |
1679 | /* look for a more recent transaction that logged this | |
1680 | ** buffer. Only the most recent transaction with a buffer in | |
1681 | ** it is allowed to send that buffer to disk | |
1682 | */ | |
1683 | pjl = find_newer_jl_for_cn(cn); | |
1684 | if (!pjl && cn->blocknr && cn->bh | |
1685 | && buffer_journal_dirty(cn->bh)) { | |
1686 | BUG_ON(!can_dirty(cn)); | |
1687 | /* if the buffer is prepared, it will either be logged | |
1688 | * or restored. If restored, we need to make sure | |
1689 | * it actually gets marked dirty | |
1690 | */ | |
1691 | clear_buffer_journal_new(cn->bh); | |
1692 | if (buffer_journal_prepared(cn->bh)) { | |
1693 | set_buffer_journal_restore_dirty(cn->bh); | |
1694 | } else { | |
1695 | set_buffer_journal_test(cn->bh); | |
1696 | mark_buffer_dirty(cn->bh); | |
1697 | } | |
1698 | } | |
1699 | cn = cn->next; | |
1700 | } | |
1701 | return ret; | |
1702 | } | |
1703 | ||
1704 | static int kupdate_transactions(struct super_block *s, | |
1705 | struct reiserfs_journal_list *jl, | |
1706 | struct reiserfs_journal_list **next_jl, | |
600ed416 | 1707 | unsigned int *next_trans_id, |
bd4c625c LT |
1708 | int num_blocks, int num_trans) |
1709 | { | |
1710 | int ret = 0; | |
1711 | int written = 0; | |
1712 | int transactions_flushed = 0; | |
600ed416 | 1713 | unsigned int orig_trans_id = jl->j_trans_id; |
bd4c625c LT |
1714 | struct buffer_chunk chunk; |
1715 | struct list_head *entry; | |
1716 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
1717 | chunk.nr = 0; | |
1718 | ||
a412f9ef | 1719 | reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s); |
bd4c625c LT |
1720 | if (!journal_list_still_alive(s, orig_trans_id)) { |
1721 | goto done; | |
1722 | } | |
1723 | ||
afe70259 | 1724 | /* we've got j_flush_mutex held, nobody is going to delete any |
bd4c625c LT |
1725 | * of these lists out from underneath us |
1726 | */ | |
1727 | while ((num_trans && transactions_flushed < num_trans) || | |
1728 | (!num_trans && written < num_blocks)) { | |
1729 | ||
1730 | if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) || | |
1731 | atomic_read(&jl->j_commit_left) | |
1732 | || !(jl->j_state & LIST_DIRTY)) { | |
1733 | del_from_work_list(s, jl); | |
1734 | break; | |
1735 | } | |
1736 | ret = write_one_transaction(s, jl, &chunk); | |
1737 | ||
1738 | if (ret < 0) | |
1739 | goto done; | |
1740 | transactions_flushed++; | |
1741 | written += ret; | |
1742 | entry = jl->j_list.next; | |
1743 | ||
1744 | /* did we wrap? */ | |
1745 | if (entry == &journal->j_journal_list) { | |
1746 | break; | |
1747 | } | |
1748 | jl = JOURNAL_LIST_ENTRY(entry); | |
1749 | ||
1750 | /* don't bother with older transactions */ | |
1751 | if (jl->j_trans_id <= orig_trans_id) | |
1752 | break; | |
1753 | } | |
1754 | if (chunk.nr) { | |
1755 | write_chunk(&chunk); | |
1756 | } | |
1757 | ||
1758 | done: | |
afe70259 | 1759 | mutex_unlock(&journal->j_flush_mutex); |
bd4c625c LT |
1760 | return ret; |
1761 | } | |
1762 | ||
1763 | /* for o_sync and fsync heavy applications, they tend to use | |
1764 | ** all the journa list slots with tiny transactions. These | |
1765 | ** trigger lots and lots of calls to update the header block, which | |
1766 | ** adds seeks and slows things down. | |
1767 | ** | |
1768 | ** This function tries to clear out a large chunk of the journal lists | |
1769 | ** at once, which makes everything faster since only the newest journal | |
1da177e4 LT |
1770 | ** list updates the header block |
1771 | */ | |
1772 | static int flush_used_journal_lists(struct super_block *s, | |
bd4c625c LT |
1773 | struct reiserfs_journal_list *jl) |
1774 | { | |
1775 | unsigned long len = 0; | |
1776 | unsigned long cur_len; | |
1777 | int ret; | |
1778 | int i; | |
1779 | int limit = 256; | |
1780 | struct reiserfs_journal_list *tjl; | |
1781 | struct reiserfs_journal_list *flush_jl; | |
600ed416 | 1782 | unsigned int trans_id; |
bd4c625c LT |
1783 | struct reiserfs_journal *journal = SB_JOURNAL(s); |
1784 | ||
1785 | flush_jl = tjl = jl; | |
1786 | ||
1787 | /* in data logging mode, try harder to flush a lot of blocks */ | |
1788 | if (reiserfs_data_log(s)) | |
1789 | limit = 1024; | |
1790 | /* flush for 256 transactions or limit blocks, whichever comes first */ | |
1791 | for (i = 0; i < 256 && len < limit; i++) { | |
1792 | if (atomic_read(&tjl->j_commit_left) || | |
1793 | tjl->j_trans_id < jl->j_trans_id) { | |
1794 | break; | |
1795 | } | |
1796 | cur_len = atomic_read(&tjl->j_nonzerolen); | |
1797 | if (cur_len > 0) { | |
1798 | tjl->j_state &= ~LIST_TOUCHED; | |
1799 | } | |
1800 | len += cur_len; | |
1801 | flush_jl = tjl; | |
1802 | if (tjl->j_list.next == &journal->j_journal_list) | |
1803 | break; | |
1804 | tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next); | |
1805 | } | |
1806 | /* try to find a group of blocks we can flush across all the | |
1807 | ** transactions, but only bother if we've actually spanned | |
1808 | ** across multiple lists | |
1809 | */ | |
1810 | if (flush_jl != jl) { | |
1811 | ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i); | |
1812 | } | |
1813 | flush_journal_list(s, flush_jl, 1); | |
1814 | return 0; | |
1da177e4 LT |
1815 | } |
1816 | ||
1817 | /* | |
1818 | ** removes any nodes in table with name block and dev as bh. | |
1819 | ** only touchs the hnext and hprev pointers. | |
1820 | */ | |
1821 | void remove_journal_hash(struct super_block *sb, | |
bd4c625c LT |
1822 | struct reiserfs_journal_cnode **table, |
1823 | struct reiserfs_journal_list *jl, | |
1824 | unsigned long block, int remove_freed) | |
1825 | { | |
1826 | struct reiserfs_journal_cnode *cur; | |
1827 | struct reiserfs_journal_cnode **head; | |
1828 | ||
1829 | head = &(journal_hash(table, sb, block)); | |
1830 | if (!head) { | |
1831 | return; | |
1832 | } | |
1833 | cur = *head; | |
1834 | while (cur) { | |
1835 | if (cur->blocknr == block && cur->sb == sb | |
1836 | && (jl == NULL || jl == cur->jlist) | |
1837 | && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) { | |
1838 | if (cur->hnext) { | |
1839 | cur->hnext->hprev = cur->hprev; | |
1840 | } | |
1841 | if (cur->hprev) { | |
1842 | cur->hprev->hnext = cur->hnext; | |
1843 | } else { | |
1844 | *head = cur->hnext; | |
1845 | } | |
1846 | cur->blocknr = 0; | |
1847 | cur->sb = NULL; | |
1848 | cur->state = 0; | |
1849 | if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */ | |
1850 | atomic_dec(&(cur->jlist->j_nonzerolen)); | |
1851 | cur->bh = NULL; | |
1852 | cur->jlist = NULL; | |
1853 | } | |
1854 | cur = cur->hnext; | |
1855 | } | |
1856 | } | |
1857 | ||
a9dd3643 | 1858 | static void free_journal_ram(struct super_block *sb) |
bd4c625c | 1859 | { |
a9dd3643 | 1860 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
d739b42b | 1861 | kfree(journal->j_current_jl); |
bd4c625c LT |
1862 | journal->j_num_lists--; |
1863 | ||
1864 | vfree(journal->j_cnode_free_orig); | |
a9dd3643 JM |
1865 | free_list_bitmaps(sb, journal->j_list_bitmap); |
1866 | free_bitmap_nodes(sb); /* must be after free_list_bitmaps */ | |
bd4c625c LT |
1867 | if (journal->j_header_bh) { |
1868 | brelse(journal->j_header_bh); | |
1869 | } | |
1870 | /* j_header_bh is on the journal dev, make sure not to release the journal | |
1871 | * dev until we brelse j_header_bh | |
1872 | */ | |
a9dd3643 | 1873 | release_journal_dev(sb, journal); |
bd4c625c | 1874 | vfree(journal); |
1da177e4 LT |
1875 | } |
1876 | ||
1877 | /* | |
1878 | ** call on unmount. Only set error to 1 if you haven't made your way out | |
1879 | ** of read_super() yet. Any other caller must keep error at 0. | |
1880 | */ | |
bd4c625c | 1881 | static int do_journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1882 | struct super_block *sb, int error) |
bd4c625c LT |
1883 | { |
1884 | struct reiserfs_transaction_handle myth; | |
1885 | int flushed = 0; | |
a9dd3643 | 1886 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
1887 | |
1888 | /* we only want to flush out transactions if we were called with error == 0 | |
1889 | */ | |
a9dd3643 | 1890 | if (!error && !(sb->s_flags & MS_RDONLY)) { |
bd4c625c LT |
1891 | /* end the current trans */ |
1892 | BUG_ON(!th->t_trans_id); | |
a9dd3643 | 1893 | do_journal_end(th, sb, 10, FLUSH_ALL); |
bd4c625c LT |
1894 | |
1895 | /* make sure something gets logged to force our way into the flush code */ | |
a9dd3643 JM |
1896 | if (!journal_join(&myth, sb, 1)) { |
1897 | reiserfs_prepare_for_journal(sb, | |
1898 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1899 | 1); |
a9dd3643 JM |
1900 | journal_mark_dirty(&myth, sb, |
1901 | SB_BUFFER_WITH_SB(sb)); | |
1902 | do_journal_end(&myth, sb, 1, FLUSH_ALL); | |
bd4c625c LT |
1903 | flushed = 1; |
1904 | } | |
1905 | } | |
1906 | ||
1907 | /* this also catches errors during the do_journal_end above */ | |
1908 | if (!error && reiserfs_is_journal_aborted(journal)) { | |
1909 | memset(&myth, 0, sizeof(myth)); | |
a9dd3643 JM |
1910 | if (!journal_join_abort(&myth, sb, 1)) { |
1911 | reiserfs_prepare_for_journal(sb, | |
1912 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 1913 | 1); |
a9dd3643 JM |
1914 | journal_mark_dirty(&myth, sb, |
1915 | SB_BUFFER_WITH_SB(sb)); | |
1916 | do_journal_end(&myth, sb, 1, FLUSH_ALL); | |
bd4c625c LT |
1917 | } |
1918 | } | |
1919 | ||
1920 | reiserfs_mounted_fs_count--; | |
1921 | /* wait for all commits to finish */ | |
a9dd3643 | 1922 | cancel_delayed_work(&SB_JOURNAL(sb)->j_work); |
8ebc4232 FW |
1923 | |
1924 | /* | |
1925 | * We must release the write lock here because | |
1926 | * the workqueue job (flush_async_commit) needs this lock | |
1927 | */ | |
1928 | reiserfs_write_unlock(sb); | |
bd4c625c | 1929 | flush_workqueue(commit_wq); |
8ebc4232 | 1930 | |
bd4c625c LT |
1931 | if (!reiserfs_mounted_fs_count) { |
1932 | destroy_workqueue(commit_wq); | |
1933 | commit_wq = NULL; | |
1934 | } | |
1935 | ||
a9dd3643 | 1936 | free_journal_ram(sb); |
bd4c625c | 1937 | |
0523676d FW |
1938 | reiserfs_write_lock(sb); |
1939 | ||
bd4c625c | 1940 | return 0; |
1da177e4 LT |
1941 | } |
1942 | ||
1943 | /* | |
1944 | ** call on unmount. flush all journal trans, release all alloc'd ram | |
1945 | */ | |
bd4c625c | 1946 | int journal_release(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1947 | struct super_block *sb) |
bd4c625c | 1948 | { |
a9dd3643 | 1949 | return do_journal_release(th, sb, 0); |
1da177e4 | 1950 | } |
bd4c625c | 1951 | |
1da177e4 LT |
1952 | /* |
1953 | ** only call from an error condition inside reiserfs_read_super! | |
1954 | */ | |
bd4c625c | 1955 | int journal_release_error(struct reiserfs_transaction_handle *th, |
a9dd3643 | 1956 | struct super_block *sb) |
bd4c625c | 1957 | { |
a9dd3643 | 1958 | return do_journal_release(th, sb, 1); |
1da177e4 LT |
1959 | } |
1960 | ||
1961 | /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */ | |
a9dd3643 | 1962 | static int journal_compare_desc_commit(struct super_block *sb, |
bd4c625c LT |
1963 | struct reiserfs_journal_desc *desc, |
1964 | struct reiserfs_journal_commit *commit) | |
1965 | { | |
1966 | if (get_commit_trans_id(commit) != get_desc_trans_id(desc) || | |
1967 | get_commit_trans_len(commit) != get_desc_trans_len(desc) || | |
a9dd3643 | 1968 | get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max || |
bd4c625c LT |
1969 | get_commit_trans_len(commit) <= 0) { |
1970 | return 1; | |
1971 | } | |
1972 | return 0; | |
1da177e4 | 1973 | } |
bd4c625c | 1974 | |
0222e657 | 1975 | /* returns 0 if it did not find a description block |
1da177e4 | 1976 | ** returns -1 if it found a corrupt commit block |
0222e657 | 1977 | ** returns 1 if both desc and commit were valid |
1da177e4 | 1978 | */ |
a9dd3643 | 1979 | static int journal_transaction_is_valid(struct super_block *sb, |
bd4c625c | 1980 | struct buffer_head *d_bh, |
600ed416 | 1981 | unsigned int *oldest_invalid_trans_id, |
bd4c625c LT |
1982 | unsigned long *newest_mount_id) |
1983 | { | |
1984 | struct reiserfs_journal_desc *desc; | |
1985 | struct reiserfs_journal_commit *commit; | |
1986 | struct buffer_head *c_bh; | |
1987 | unsigned long offset; | |
1988 | ||
1989 | if (!d_bh) | |
1990 | return 0; | |
1991 | ||
1992 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
1993 | if (get_desc_trans_len(desc) > 0 | |
1994 | && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) { | |
1995 | if (oldest_invalid_trans_id && *oldest_invalid_trans_id | |
1996 | && get_desc_trans_id(desc) > *oldest_invalid_trans_id) { | |
a9dd3643 | 1997 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
1998 | "journal-986: transaction " |
1999 | "is valid returning because trans_id %d is greater than " | |
2000 | "oldest_invalid %lu", | |
2001 | get_desc_trans_id(desc), | |
2002 | *oldest_invalid_trans_id); | |
2003 | return 0; | |
2004 | } | |
2005 | if (newest_mount_id | |
2006 | && *newest_mount_id > get_desc_mount_id(desc)) { | |
a9dd3643 | 2007 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2008 | "journal-1087: transaction " |
2009 | "is valid returning because mount_id %d is less than " | |
2010 | "newest_mount_id %lu", | |
2011 | get_desc_mount_id(desc), | |
2012 | *newest_mount_id); | |
2013 | return -1; | |
2014 | } | |
a9dd3643 JM |
2015 | if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) { |
2016 | reiserfs_warning(sb, "journal-2018", | |
45b03d5e JM |
2017 | "Bad transaction length %d " |
2018 | "encountered, ignoring transaction", | |
bd4c625c LT |
2019 | get_desc_trans_len(desc)); |
2020 | return -1; | |
2021 | } | |
a9dd3643 | 2022 | offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2023 | |
2024 | /* ok, we have a journal description block, lets see if the transaction was valid */ | |
2025 | c_bh = | |
a9dd3643 JM |
2026 | journal_bread(sb, |
2027 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2028 | ((offset + get_desc_trans_len(desc) + |
a9dd3643 | 2029 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2030 | if (!c_bh) |
2031 | return 0; | |
2032 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2033 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2034 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2035 | "journal_transaction_is_valid, commit offset %ld had bad " |
2036 | "time %d or length %d", | |
2037 | c_bh->b_blocknr - | |
a9dd3643 | 2038 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2039 | get_commit_trans_id(commit), |
2040 | get_commit_trans_len(commit)); | |
2041 | brelse(c_bh); | |
2042 | if (oldest_invalid_trans_id) { | |
2043 | *oldest_invalid_trans_id = | |
2044 | get_desc_trans_id(desc); | |
a9dd3643 | 2045 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2046 | "journal-1004: " |
2047 | "transaction_is_valid setting oldest invalid trans_id " | |
2048 | "to %d", | |
2049 | get_desc_trans_id(desc)); | |
2050 | } | |
2051 | return -1; | |
2052 | } | |
2053 | brelse(c_bh); | |
a9dd3643 | 2054 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2055 | "journal-1006: found valid " |
2056 | "transaction start offset %llu, len %d id %d", | |
2057 | d_bh->b_blocknr - | |
a9dd3643 | 2058 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2059 | get_desc_trans_len(desc), |
2060 | get_desc_trans_id(desc)); | |
2061 | return 1; | |
2062 | } else { | |
2063 | return 0; | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | static void brelse_array(struct buffer_head **heads, int num) | |
2068 | { | |
2069 | int i; | |
2070 | for (i = 0; i < num; i++) { | |
2071 | brelse(heads[i]); | |
2072 | } | |
1da177e4 LT |
2073 | } |
2074 | ||
2075 | /* | |
2076 | ** given the start, and values for the oldest acceptable transactions, | |
2077 | ** this either reads in a replays a transaction, or returns because the transaction | |
2078 | ** is invalid, or too old. | |
2079 | */ | |
a9dd3643 | 2080 | static int journal_read_transaction(struct super_block *sb, |
bd4c625c LT |
2081 | unsigned long cur_dblock, |
2082 | unsigned long oldest_start, | |
600ed416 | 2083 | unsigned int oldest_trans_id, |
bd4c625c LT |
2084 | unsigned long newest_mount_id) |
2085 | { | |
a9dd3643 | 2086 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
2087 | struct reiserfs_journal_desc *desc; |
2088 | struct reiserfs_journal_commit *commit; | |
600ed416 | 2089 | unsigned int trans_id = 0; |
bd4c625c LT |
2090 | struct buffer_head *c_bh; |
2091 | struct buffer_head *d_bh; | |
2092 | struct buffer_head **log_blocks = NULL; | |
2093 | struct buffer_head **real_blocks = NULL; | |
600ed416 | 2094 | unsigned int trans_offset; |
bd4c625c LT |
2095 | int i; |
2096 | int trans_half; | |
2097 | ||
a9dd3643 | 2098 | d_bh = journal_bread(sb, cur_dblock); |
bd4c625c LT |
2099 | if (!d_bh) |
2100 | return 1; | |
2101 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
a9dd3643 JM |
2102 | trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2103 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: " | |
bd4c625c | 2104 | "journal_read_transaction, offset %llu, len %d mount_id %d", |
a9dd3643 | 2105 | d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2106 | get_desc_trans_len(desc), get_desc_mount_id(desc)); |
2107 | if (get_desc_trans_id(desc) < oldest_trans_id) { | |
a9dd3643 | 2108 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: " |
bd4c625c LT |
2109 | "journal_read_trans skipping because %lu is too old", |
2110 | cur_dblock - | |
a9dd3643 | 2111 | SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2112 | brelse(d_bh); |
2113 | return 1; | |
2114 | } | |
2115 | if (get_desc_mount_id(desc) != newest_mount_id) { | |
a9dd3643 | 2116 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: " |
bd4c625c LT |
2117 | "journal_read_trans skipping because %d is != " |
2118 | "newest_mount_id %lu", get_desc_mount_id(desc), | |
2119 | newest_mount_id); | |
2120 | brelse(d_bh); | |
2121 | return 1; | |
2122 | } | |
a9dd3643 | 2123 | c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2124 | ((trans_offset + get_desc_trans_len(desc) + 1) % |
a9dd3643 | 2125 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
2126 | if (!c_bh) { |
2127 | brelse(d_bh); | |
2128 | return 1; | |
2129 | } | |
2130 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; | |
a9dd3643 JM |
2131 | if (journal_compare_desc_commit(sb, desc, commit)) { |
2132 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c LT |
2133 | "journal_read_transaction, " |
2134 | "commit offset %llu had bad time %d or length %d", | |
2135 | c_bh->b_blocknr - | |
a9dd3643 | 2136 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2137 | get_commit_trans_id(commit), |
2138 | get_commit_trans_len(commit)); | |
2139 | brelse(c_bh); | |
2140 | brelse(d_bh); | |
2141 | return 1; | |
2142 | } | |
3f8b5ee3 JM |
2143 | |
2144 | if (bdev_read_only(sb->s_bdev)) { | |
2145 | reiserfs_warning(sb, "clm-2076", | |
2146 | "device is readonly, unable to replay log"); | |
2147 | brelse(c_bh); | |
2148 | brelse(d_bh); | |
2149 | return -EROFS; | |
2150 | } | |
2151 | ||
bd4c625c LT |
2152 | trans_id = get_desc_trans_id(desc); |
2153 | /* now we know we've got a good transaction, and it was inside the valid time ranges */ | |
d739b42b PE |
2154 | log_blocks = kmalloc(get_desc_trans_len(desc) * |
2155 | sizeof(struct buffer_head *), GFP_NOFS); | |
2156 | real_blocks = kmalloc(get_desc_trans_len(desc) * | |
2157 | sizeof(struct buffer_head *), GFP_NOFS); | |
bd4c625c LT |
2158 | if (!log_blocks || !real_blocks) { |
2159 | brelse(c_bh); | |
2160 | brelse(d_bh); | |
d739b42b PE |
2161 | kfree(log_blocks); |
2162 | kfree(real_blocks); | |
a9dd3643 | 2163 | reiserfs_warning(sb, "journal-1169", |
45b03d5e | 2164 | "kmalloc failed, unable to mount FS"); |
bd4c625c LT |
2165 | return -1; |
2166 | } | |
2167 | /* get all the buffer heads */ | |
a9dd3643 | 2168 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
2169 | for (i = 0; i < get_desc_trans_len(desc); i++) { |
2170 | log_blocks[i] = | |
a9dd3643 JM |
2171 | journal_getblk(sb, |
2172 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2173 | (trans_offset + 1 + |
a9dd3643 | 2174 | i) % SB_ONDISK_JOURNAL_SIZE(sb)); |
bd4c625c LT |
2175 | if (i < trans_half) { |
2176 | real_blocks[i] = | |
a9dd3643 | 2177 | sb_getblk(sb, |
bd4c625c LT |
2178 | le32_to_cpu(desc->j_realblock[i])); |
2179 | } else { | |
2180 | real_blocks[i] = | |
a9dd3643 | 2181 | sb_getblk(sb, |
bd4c625c LT |
2182 | le32_to_cpu(commit-> |
2183 | j_realblock[i - trans_half])); | |
2184 | } | |
a9dd3643 JM |
2185 | if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) { |
2186 | reiserfs_warning(sb, "journal-1207", | |
45b03d5e JM |
2187 | "REPLAY FAILURE fsck required! " |
2188 | "Block to replay is outside of " | |
2189 | "filesystem"); | |
bd4c625c LT |
2190 | goto abort_replay; |
2191 | } | |
2192 | /* make sure we don't try to replay onto log or reserved area */ | |
2193 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
2194 | (sb, real_blocks[i]->b_blocknr)) { |
2195 | reiserfs_warning(sb, "journal-1204", | |
45b03d5e JM |
2196 | "REPLAY FAILURE fsck required! " |
2197 | "Trying to replay onto a log block"); | |
bd4c625c LT |
2198 | abort_replay: |
2199 | brelse_array(log_blocks, i); | |
2200 | brelse_array(real_blocks, i); | |
2201 | brelse(c_bh); | |
2202 | brelse(d_bh); | |
d739b42b PE |
2203 | kfree(log_blocks); |
2204 | kfree(real_blocks); | |
bd4c625c LT |
2205 | return -1; |
2206 | } | |
2207 | } | |
2208 | /* read in the log blocks, memcpy to the corresponding real block */ | |
2209 | ll_rw_block(READ, get_desc_trans_len(desc), log_blocks); | |
2210 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
8ebc4232 FW |
2211 | |
2212 | reiserfs_write_unlock(sb); | |
bd4c625c | 2213 | wait_on_buffer(log_blocks[i]); |
8ebc4232 FW |
2214 | reiserfs_write_lock(sb); |
2215 | ||
bd4c625c | 2216 | if (!buffer_uptodate(log_blocks[i])) { |
a9dd3643 | 2217 | reiserfs_warning(sb, "journal-1212", |
45b03d5e JM |
2218 | "REPLAY FAILURE fsck required! " |
2219 | "buffer write failed"); | |
bd4c625c LT |
2220 | brelse_array(log_blocks + i, |
2221 | get_desc_trans_len(desc) - i); | |
2222 | brelse_array(real_blocks, get_desc_trans_len(desc)); | |
2223 | brelse(c_bh); | |
2224 | brelse(d_bh); | |
d739b42b PE |
2225 | kfree(log_blocks); |
2226 | kfree(real_blocks); | |
bd4c625c LT |
2227 | return -1; |
2228 | } | |
2229 | memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data, | |
2230 | real_blocks[i]->b_size); | |
2231 | set_buffer_uptodate(real_blocks[i]); | |
2232 | brelse(log_blocks[i]); | |
2233 | } | |
2234 | /* flush out the real blocks */ | |
2235 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2236 | set_buffer_dirty(real_blocks[i]); | |
9cb569d6 | 2237 | write_dirty_buffer(real_blocks[i], WRITE); |
bd4c625c LT |
2238 | } |
2239 | for (i = 0; i < get_desc_trans_len(desc); i++) { | |
2240 | wait_on_buffer(real_blocks[i]); | |
2241 | if (!buffer_uptodate(real_blocks[i])) { | |
a9dd3643 | 2242 | reiserfs_warning(sb, "journal-1226", |
45b03d5e JM |
2243 | "REPLAY FAILURE, fsck required! " |
2244 | "buffer write failed"); | |
bd4c625c LT |
2245 | brelse_array(real_blocks + i, |
2246 | get_desc_trans_len(desc) - i); | |
2247 | brelse(c_bh); | |
2248 | brelse(d_bh); | |
d739b42b PE |
2249 | kfree(log_blocks); |
2250 | kfree(real_blocks); | |
bd4c625c LT |
2251 | return -1; |
2252 | } | |
2253 | brelse(real_blocks[i]); | |
2254 | } | |
2255 | cur_dblock = | |
a9dd3643 | 2256 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 2257 | ((trans_offset + get_desc_trans_len(desc) + |
a9dd3643 JM |
2258 | 2) % SB_ONDISK_JOURNAL_SIZE(sb)); |
2259 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, | |
bd4c625c | 2260 | "journal-1095: setting journal " "start to offset %ld", |
a9dd3643 | 2261 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb)); |
bd4c625c LT |
2262 | |
2263 | /* init starting values for the first transaction, in case this is the last transaction to be replayed. */ | |
a9dd3643 | 2264 | journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
bd4c625c LT |
2265 | journal->j_last_flush_trans_id = trans_id; |
2266 | journal->j_trans_id = trans_id + 1; | |
a44c94a7 AZ |
2267 | /* check for trans_id overflow */ |
2268 | if (journal->j_trans_id == 0) | |
2269 | journal->j_trans_id = 10; | |
bd4c625c LT |
2270 | brelse(c_bh); |
2271 | brelse(d_bh); | |
d739b42b PE |
2272 | kfree(log_blocks); |
2273 | kfree(real_blocks); | |
bd4c625c | 2274 | return 0; |
1da177e4 LT |
2275 | } |
2276 | ||
2277 | /* This function reads blocks starting from block and to max_block of bufsize | |
2278 | size (but no more than BUFNR blocks at a time). This proved to improve | |
2279 | mounting speed on self-rebuilding raid5 arrays at least. | |
2280 | Right now it is only used from journal code. But later we might use it | |
2281 | from other places. | |
2282 | Note: Do not use journal_getblk/sb_getblk functions here! */ | |
3ee16670 JM |
2283 | static struct buffer_head *reiserfs_breada(struct block_device *dev, |
2284 | b_blocknr_t block, int bufsize, | |
2285 | b_blocknr_t max_block) | |
1da177e4 | 2286 | { |
bd4c625c | 2287 | struct buffer_head *bhlist[BUFNR]; |
1da177e4 | 2288 | unsigned int blocks = BUFNR; |
bd4c625c | 2289 | struct buffer_head *bh; |
1da177e4 | 2290 | int i, j; |
bd4c625c LT |
2291 | |
2292 | bh = __getblk(dev, block, bufsize); | |
2293 | if (buffer_uptodate(bh)) | |
2294 | return (bh); | |
2295 | ||
1da177e4 LT |
2296 | if (block + BUFNR > max_block) { |
2297 | blocks = max_block - block; | |
2298 | } | |
2299 | bhlist[0] = bh; | |
2300 | j = 1; | |
2301 | for (i = 1; i < blocks; i++) { | |
bd4c625c LT |
2302 | bh = __getblk(dev, block + i, bufsize); |
2303 | if (buffer_uptodate(bh)) { | |
2304 | brelse(bh); | |
1da177e4 | 2305 | break; |
bd4c625c LT |
2306 | } else |
2307 | bhlist[j++] = bh; | |
1da177e4 | 2308 | } |
bd4c625c LT |
2309 | ll_rw_block(READ, j, bhlist); |
2310 | for (i = 1; i < j; i++) | |
2311 | brelse(bhlist[i]); | |
1da177e4 | 2312 | bh = bhlist[0]; |
bd4c625c LT |
2313 | wait_on_buffer(bh); |
2314 | if (buffer_uptodate(bh)) | |
1da177e4 | 2315 | return bh; |
bd4c625c | 2316 | brelse(bh); |
1da177e4 LT |
2317 | return NULL; |
2318 | } | |
2319 | ||
2320 | /* | |
2321 | ** read and replay the log | |
2322 | ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid | |
2323 | ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast. | |
2324 | ** | |
2325 | ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid. | |
2326 | ** | |
2327 | ** On exit, it sets things up so the first transaction will work correctly. | |
2328 | */ | |
a9dd3643 | 2329 | static int journal_read(struct super_block *sb) |
bd4c625c | 2330 | { |
a9dd3643 | 2331 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c | 2332 | struct reiserfs_journal_desc *desc; |
600ed416 JM |
2333 | unsigned int oldest_trans_id = 0; |
2334 | unsigned int oldest_invalid_trans_id = 0; | |
bd4c625c LT |
2335 | time_t start; |
2336 | unsigned long oldest_start = 0; | |
2337 | unsigned long cur_dblock = 0; | |
2338 | unsigned long newest_mount_id = 9; | |
2339 | struct buffer_head *d_bh; | |
2340 | struct reiserfs_journal_header *jh; | |
2341 | int valid_journal_header = 0; | |
2342 | int replay_count = 0; | |
2343 | int continue_replay = 1; | |
2344 | int ret; | |
2345 | char b[BDEVNAME_SIZE]; | |
2346 | ||
a9dd3643 JM |
2347 | cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb); |
2348 | reiserfs_info(sb, "checking transaction log (%s)\n", | |
bd4c625c LT |
2349 | bdevname(journal->j_dev_bd, b)); |
2350 | start = get_seconds(); | |
2351 | ||
0222e657 JM |
2352 | /* step 1, read in the journal header block. Check the transaction it says |
2353 | ** is the first unflushed, and if that transaction is not valid, | |
bd4c625c LT |
2354 | ** replay is done |
2355 | */ | |
a9dd3643 JM |
2356 | journal->j_header_bh = journal_bread(sb, |
2357 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) | |
2358 | + SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c LT |
2359 | if (!journal->j_header_bh) { |
2360 | return 1; | |
2361 | } | |
2362 | jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data); | |
c499ec24 | 2363 | if (le32_to_cpu(jh->j_first_unflushed_offset) < |
a9dd3643 | 2364 | SB_ONDISK_JOURNAL_SIZE(sb) |
bd4c625c LT |
2365 | && le32_to_cpu(jh->j_last_flush_trans_id) > 0) { |
2366 | oldest_start = | |
a9dd3643 | 2367 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c LT |
2368 | le32_to_cpu(jh->j_first_unflushed_offset); |
2369 | oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
2370 | newest_mount_id = le32_to_cpu(jh->j_mount_id); | |
a9dd3643 | 2371 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2372 | "journal-1153: found in " |
2373 | "header: first_unflushed_offset %d, last_flushed_trans_id " | |
2374 | "%lu", le32_to_cpu(jh->j_first_unflushed_offset), | |
2375 | le32_to_cpu(jh->j_last_flush_trans_id)); | |
2376 | valid_journal_header = 1; | |
2377 | ||
0222e657 JM |
2378 | /* now, we try to read the first unflushed offset. If it is not valid, |
2379 | ** there is nothing more we can do, and it makes no sense to read | |
bd4c625c LT |
2380 | ** through the whole log. |
2381 | */ | |
2382 | d_bh = | |
a9dd3643 JM |
2383 | journal_bread(sb, |
2384 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c | 2385 | le32_to_cpu(jh->j_first_unflushed_offset)); |
a9dd3643 | 2386 | ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL); |
bd4c625c LT |
2387 | if (!ret) { |
2388 | continue_replay = 0; | |
2389 | } | |
2390 | brelse(d_bh); | |
2391 | goto start_log_replay; | |
2392 | } | |
2393 | ||
bd4c625c LT |
2394 | /* ok, there are transactions that need to be replayed. start with the first log block, find |
2395 | ** all the valid transactions, and pick out the oldest. | |
2396 | */ | |
2397 | while (continue_replay | |
2398 | && cur_dblock < | |
a9dd3643 JM |
2399 | (SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
2400 | SB_ONDISK_JOURNAL_SIZE(sb))) { | |
bd4c625c LT |
2401 | /* Note that it is required for blocksize of primary fs device and journal |
2402 | device to be the same */ | |
2403 | d_bh = | |
2404 | reiserfs_breada(journal->j_dev_bd, cur_dblock, | |
a9dd3643 JM |
2405 | sb->s_blocksize, |
2406 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2407 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2408 | ret = |
a9dd3643 | 2409 | journal_transaction_is_valid(sb, d_bh, |
bd4c625c LT |
2410 | &oldest_invalid_trans_id, |
2411 | &newest_mount_id); | |
2412 | if (ret == 1) { | |
2413 | desc = (struct reiserfs_journal_desc *)d_bh->b_data; | |
2414 | if (oldest_start == 0) { /* init all oldest_ values */ | |
2415 | oldest_trans_id = get_desc_trans_id(desc); | |
2416 | oldest_start = d_bh->b_blocknr; | |
2417 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2418 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2419 | "journal-1179: Setting " |
2420 | "oldest_start to offset %llu, trans_id %lu", | |
2421 | oldest_start - | |
2422 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2423 | (sb), oldest_trans_id); |
bd4c625c LT |
2424 | } else if (oldest_trans_id > get_desc_trans_id(desc)) { |
2425 | /* one we just read was older */ | |
2426 | oldest_trans_id = get_desc_trans_id(desc); | |
2427 | oldest_start = d_bh->b_blocknr; | |
a9dd3643 | 2428 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2429 | "journal-1180: Resetting " |
2430 | "oldest_start to offset %lu, trans_id %lu", | |
2431 | oldest_start - | |
2432 | SB_ONDISK_JOURNAL_1st_BLOCK | |
a9dd3643 | 2433 | (sb), oldest_trans_id); |
bd4c625c LT |
2434 | } |
2435 | if (newest_mount_id < get_desc_mount_id(desc)) { | |
2436 | newest_mount_id = get_desc_mount_id(desc); | |
a9dd3643 | 2437 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2438 | "journal-1299: Setting " |
2439 | "newest_mount_id to %d", | |
2440 | get_desc_mount_id(desc)); | |
2441 | } | |
2442 | cur_dblock += get_desc_trans_len(desc) + 2; | |
2443 | } else { | |
2444 | cur_dblock++; | |
2445 | } | |
2446 | brelse(d_bh); | |
2447 | } | |
2448 | ||
2449 | start_log_replay: | |
2450 | cur_dblock = oldest_start; | |
2451 | if (oldest_trans_id) { | |
a9dd3643 | 2452 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2453 | "journal-1206: Starting replay " |
2454 | "from offset %llu, trans_id %lu", | |
a9dd3643 | 2455 | cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb), |
bd4c625c LT |
2456 | oldest_trans_id); |
2457 | ||
2458 | } | |
2459 | replay_count = 0; | |
2460 | while (continue_replay && oldest_trans_id > 0) { | |
2461 | ret = | |
a9dd3643 | 2462 | journal_read_transaction(sb, cur_dblock, oldest_start, |
bd4c625c LT |
2463 | oldest_trans_id, newest_mount_id); |
2464 | if (ret < 0) { | |
2465 | return ret; | |
2466 | } else if (ret != 0) { | |
2467 | break; | |
2468 | } | |
2469 | cur_dblock = | |
a9dd3643 | 2470 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start; |
bd4c625c LT |
2471 | replay_count++; |
2472 | if (cur_dblock == oldest_start) | |
2473 | break; | |
2474 | } | |
2475 | ||
2476 | if (oldest_trans_id == 0) { | |
a9dd3643 | 2477 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, |
bd4c625c LT |
2478 | "journal-1225: No valid " "transactions found"); |
2479 | } | |
2480 | /* j_start does not get set correctly if we don't replay any transactions. | |
2481 | ** if we had a valid journal_header, set j_start to the first unflushed transaction value, | |
2482 | ** copy the trans_id from the header | |
2483 | */ | |
2484 | if (valid_journal_header && replay_count == 0) { | |
2485 | journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset); | |
2486 | journal->j_trans_id = | |
2487 | le32_to_cpu(jh->j_last_flush_trans_id) + 1; | |
a44c94a7 AZ |
2488 | /* check for trans_id overflow */ |
2489 | if (journal->j_trans_id == 0) | |
2490 | journal->j_trans_id = 10; | |
bd4c625c LT |
2491 | journal->j_last_flush_trans_id = |
2492 | le32_to_cpu(jh->j_last_flush_trans_id); | |
2493 | journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1; | |
2494 | } else { | |
2495 | journal->j_mount_id = newest_mount_id + 1; | |
2496 | } | |
a9dd3643 | 2497 | reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting " |
bd4c625c LT |
2498 | "newest_mount_id to %lu", journal->j_mount_id); |
2499 | journal->j_first_unflushed_offset = journal->j_start; | |
2500 | if (replay_count > 0) { | |
a9dd3643 | 2501 | reiserfs_info(sb, |
bd4c625c LT |
2502 | "replayed %d transactions in %lu seconds\n", |
2503 | replay_count, get_seconds() - start); | |
2504 | } | |
a9dd3643 JM |
2505 | if (!bdev_read_only(sb->s_bdev) && |
2506 | _update_journal_header_block(sb, journal->j_start, | |
bd4c625c LT |
2507 | journal->j_last_flush_trans_id)) { |
2508 | /* replay failed, caller must call free_journal_ram and abort | |
2509 | ** the mount | |
2510 | */ | |
2511 | return -1; | |
2512 | } | |
2513 | return 0; | |
1da177e4 LT |
2514 | } |
2515 | ||
2516 | static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s) | |
2517 | { | |
bd4c625c | 2518 | struct reiserfs_journal_list *jl; |
8c777cc4 PE |
2519 | jl = kzalloc(sizeof(struct reiserfs_journal_list), |
2520 | GFP_NOFS | __GFP_NOFAIL); | |
bd4c625c LT |
2521 | INIT_LIST_HEAD(&jl->j_list); |
2522 | INIT_LIST_HEAD(&jl->j_working_list); | |
2523 | INIT_LIST_HEAD(&jl->j_tail_bh_list); | |
2524 | INIT_LIST_HEAD(&jl->j_bh_list); | |
90415dea | 2525 | mutex_init(&jl->j_commit_mutex); |
bd4c625c LT |
2526 | SB_JOURNAL(s)->j_num_lists++; |
2527 | get_journal_list(jl); | |
2528 | return jl; | |
2529 | } | |
2530 | ||
a9dd3643 | 2531 | static void journal_list_init(struct super_block *sb) |
bd4c625c | 2532 | { |
a9dd3643 | 2533 | SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
2534 | } |
2535 | ||
2536 | static int release_journal_dev(struct super_block *super, | |
2537 | struct reiserfs_journal *journal) | |
2538 | { | |
2539 | int result; | |
2540 | ||
2541 | result = 0; | |
2542 | ||
86098fa0 | 2543 | if (journal->j_dev_bd != NULL) { |
e5eb8caa | 2544 | result = blkdev_put(journal->j_dev_bd, journal->j_dev_mode); |
bd4c625c LT |
2545 | journal->j_dev_bd = NULL; |
2546 | } | |
2547 | ||
2548 | if (result != 0) { | |
45b03d5e JM |
2549 | reiserfs_warning(super, "sh-457", |
2550 | "Cannot release journal device: %i", result); | |
bd4c625c LT |
2551 | } |
2552 | return result; | |
2553 | } | |
2554 | ||
2555 | static int journal_init_dev(struct super_block *super, | |
2556 | struct reiserfs_journal *journal, | |
2557 | const char *jdev_name) | |
1da177e4 LT |
2558 | { |
2559 | int result; | |
2560 | dev_t jdev; | |
e525fd89 | 2561 | fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; |
1da177e4 LT |
2562 | char b[BDEVNAME_SIZE]; |
2563 | ||
2564 | result = 0; | |
2565 | ||
bd4c625c | 2566 | journal->j_dev_bd = NULL; |
bd4c625c LT |
2567 | jdev = SB_ONDISK_JOURNAL_DEVICE(super) ? |
2568 | new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev; | |
1da177e4 LT |
2569 | |
2570 | if (bdev_read_only(super->s_bdev)) | |
bd4c625c | 2571 | blkdev_mode = FMODE_READ; |
1da177e4 LT |
2572 | |
2573 | /* there is no "jdev" option and journal is on separate device */ | |
bd4c625c | 2574 | if ((!jdev_name || !jdev_name[0])) { |
e525fd89 TH |
2575 | if (jdev == super->s_dev) |
2576 | blkdev_mode &= ~FMODE_EXCL; | |
d4d77629 TH |
2577 | journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode, |
2578 | journal); | |
e5eb8caa | 2579 | journal->j_dev_mode = blkdev_mode; |
1da177e4 LT |
2580 | if (IS_ERR(journal->j_dev_bd)) { |
2581 | result = PTR_ERR(journal->j_dev_bd); | |
2582 | journal->j_dev_bd = NULL; | |
45b03d5e | 2583 | reiserfs_warning(super, "sh-458", |
bd4c625c LT |
2584 | "cannot init journal device '%s': %i", |
2585 | __bdevname(jdev, b), result); | |
1da177e4 | 2586 | return result; |
e525fd89 | 2587 | } else if (jdev != super->s_dev) |
1da177e4 | 2588 | set_blocksize(journal->j_dev_bd, super->s_blocksize); |
86098fa0 | 2589 | |
1da177e4 LT |
2590 | return 0; |
2591 | } | |
2592 | ||
e5eb8caa | 2593 | journal->j_dev_mode = blkdev_mode; |
d4d77629 | 2594 | journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal); |
86098fa0 CH |
2595 | if (IS_ERR(journal->j_dev_bd)) { |
2596 | result = PTR_ERR(journal->j_dev_bd); | |
2597 | journal->j_dev_bd = NULL; | |
bd4c625c LT |
2598 | reiserfs_warning(super, |
2599 | "journal_init_dev: Cannot open '%s': %i", | |
2600 | jdev_name, result); | |
86098fa0 | 2601 | return result; |
1da177e4 | 2602 | } |
86098fa0 CH |
2603 | |
2604 | set_blocksize(journal->j_dev_bd, super->s_blocksize); | |
2605 | reiserfs_info(super, | |
2606 | "journal_init_dev: journal device: %s\n", | |
2607 | bdevname(journal->j_dev_bd, b)); | |
2608 | return 0; | |
1da177e4 LT |
2609 | } |
2610 | ||
cf3d0b81 ES |
2611 | /** |
2612 | * When creating/tuning a file system user can assign some | |
2613 | * journal params within boundaries which depend on the ratio | |
2614 | * blocksize/standard_blocksize. | |
2615 | * | |
2616 | * For blocks >= standard_blocksize transaction size should | |
2617 | * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more | |
2618 | * then JOURNAL_TRANS_MAX_DEFAULT. | |
2619 | * | |
2620 | * For blocks < standard_blocksize these boundaries should be | |
2621 | * decreased proportionally. | |
2622 | */ | |
2623 | #define REISERFS_STANDARD_BLKSIZE (4096) | |
2624 | ||
a9dd3643 | 2625 | static int check_advise_trans_params(struct super_block *sb, |
cf3d0b81 ES |
2626 | struct reiserfs_journal *journal) |
2627 | { | |
2628 | if (journal->j_trans_max) { | |
2629 | /* Non-default journal params. | |
2630 | Do sanity check for them. */ | |
2631 | int ratio = 1; | |
a9dd3643 JM |
2632 | if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE) |
2633 | ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize; | |
cf3d0b81 ES |
2634 | |
2635 | if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio || | |
2636 | journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio || | |
a9dd3643 | 2637 | SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max < |
cf3d0b81 | 2638 | JOURNAL_MIN_RATIO) { |
a9dd3643 | 2639 | reiserfs_warning(sb, "sh-462", |
45b03d5e JM |
2640 | "bad transaction max size (%u). " |
2641 | "FSCK?", journal->j_trans_max); | |
cf3d0b81 ES |
2642 | return 1; |
2643 | } | |
2644 | if (journal->j_max_batch != (journal->j_trans_max) * | |
2645 | JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) { | |
a9dd3643 | 2646 | reiserfs_warning(sb, "sh-463", |
45b03d5e JM |
2647 | "bad transaction max batch (%u). " |
2648 | "FSCK?", journal->j_max_batch); | |
cf3d0b81 ES |
2649 | return 1; |
2650 | } | |
2651 | } else { | |
2652 | /* Default journal params. | |
2653 | The file system was created by old version | |
2654 | of mkreiserfs, so some fields contain zeros, | |
2655 | and we need to advise proper values for them */ | |
a9dd3643 JM |
2656 | if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) { |
2657 | reiserfs_warning(sb, "sh-464", "bad blocksize (%u)", | |
2658 | sb->s_blocksize); | |
45b03d5e JM |
2659 | return 1; |
2660 | } | |
cf3d0b81 ES |
2661 | journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT; |
2662 | journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT; | |
2663 | journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE; | |
2664 | } | |
2665 | return 0; | |
2666 | } | |
2667 | ||
1da177e4 LT |
2668 | /* |
2669 | ** must be called once on fs mount. calls journal_read for you | |
2670 | */ | |
a9dd3643 | 2671 | int journal_init(struct super_block *sb, const char *j_dev_name, |
bd4c625c LT |
2672 | int old_format, unsigned int commit_max_age) |
2673 | { | |
a9dd3643 | 2674 | int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2; |
bd4c625c LT |
2675 | struct buffer_head *bhjh; |
2676 | struct reiserfs_super_block *rs; | |
2677 | struct reiserfs_journal_header *jh; | |
2678 | struct reiserfs_journal *journal; | |
2679 | struct reiserfs_journal_list *jl; | |
2680 | char b[BDEVNAME_SIZE]; | |
98ea3f50 | 2681 | int ret; |
bd4c625c | 2682 | |
98ea3f50 FW |
2683 | /* |
2684 | * Unlock here to avoid various RECLAIM-FS-ON <-> IN-RECLAIM-FS | |
2685 | * dependency inversion warnings. | |
2686 | */ | |
2687 | reiserfs_write_unlock(sb); | |
a9dd3643 | 2688 | journal = SB_JOURNAL(sb) = vmalloc(sizeof(struct reiserfs_journal)); |
bd4c625c | 2689 | if (!journal) { |
a9dd3643 | 2690 | reiserfs_warning(sb, "journal-1256", |
45b03d5e | 2691 | "unable to get memory for journal structure"); |
98ea3f50 | 2692 | reiserfs_write_lock(sb); |
bd4c625c LT |
2693 | return 1; |
2694 | } | |
2695 | memset(journal, 0, sizeof(struct reiserfs_journal)); | |
2696 | INIT_LIST_HEAD(&journal->j_bitmap_nodes); | |
2697 | INIT_LIST_HEAD(&journal->j_prealloc_list); | |
2698 | INIT_LIST_HEAD(&journal->j_working_list); | |
2699 | INIT_LIST_HEAD(&journal->j_journal_list); | |
2700 | journal->j_persistent_trans = 0; | |
98ea3f50 FW |
2701 | ret = reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap, |
2702 | reiserfs_bmap_count(sb)); | |
2703 | reiserfs_write_lock(sb); | |
2704 | if (ret) | |
bd4c625c | 2705 | goto free_and_return; |
98ea3f50 | 2706 | |
a9dd3643 | 2707 | allocate_bitmap_nodes(sb); |
bd4c625c LT |
2708 | |
2709 | /* reserved for journal area support */ | |
a9dd3643 | 2710 | SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ? |
bd4c625c | 2711 | REISERFS_OLD_DISK_OFFSET_IN_BYTES |
a9dd3643 JM |
2712 | / sb->s_blocksize + |
2713 | reiserfs_bmap_count(sb) + | |
bd4c625c LT |
2714 | 1 : |
2715 | REISERFS_DISK_OFFSET_IN_BYTES / | |
a9dd3643 | 2716 | sb->s_blocksize + 2); |
bd4c625c | 2717 | |
25985edc | 2718 | /* Sanity check to see is the standard journal fitting within first bitmap |
bd4c625c | 2719 | (actual for small blocksizes) */ |
a9dd3643 JM |
2720 | if (!SB_ONDISK_JOURNAL_DEVICE(sb) && |
2721 | (SB_JOURNAL_1st_RESERVED_BLOCK(sb) + | |
2722 | SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) { | |
2723 | reiserfs_warning(sb, "journal-1393", | |
45b03d5e JM |
2724 | "journal does not fit for area addressed " |
2725 | "by first of bitmap blocks. It starts at " | |
bd4c625c | 2726 | "%u and its size is %u. Block size %ld", |
a9dd3643 JM |
2727 | SB_JOURNAL_1st_RESERVED_BLOCK(sb), |
2728 | SB_ONDISK_JOURNAL_SIZE(sb), | |
2729 | sb->s_blocksize); | |
bd4c625c LT |
2730 | goto free_and_return; |
2731 | } | |
2732 | ||
193be0ee FW |
2733 | /* |
2734 | * We need to unlock here to avoid creating the following | |
2735 | * dependency: | |
2736 | * reiserfs_lock -> sysfs_mutex | |
2737 | * Because the reiserfs mmap path creates the following dependency: | |
2738 | * mm->mmap -> reiserfs_lock, hence we have | |
2739 | * mm->mmap -> reiserfs_lock ->sysfs_mutex | |
2740 | * This would ends up in a circular dependency with sysfs readdir path | |
2741 | * which does sysfs_mutex -> mm->mmap_sem | |
2742 | * This is fine because the reiserfs lock is useless in mount path, | |
2743 | * at least until we call journal_begin. We keep it for paranoid | |
2744 | * reasons. | |
2745 | */ | |
2746 | reiserfs_write_unlock(sb); | |
a9dd3643 | 2747 | if (journal_init_dev(sb, journal, j_dev_name) != 0) { |
193be0ee | 2748 | reiserfs_write_lock(sb); |
a9dd3643 | 2749 | reiserfs_warning(sb, "sh-462", |
45b03d5e | 2750 | "unable to initialize jornal device"); |
bd4c625c LT |
2751 | goto free_and_return; |
2752 | } | |
193be0ee | 2753 | reiserfs_write_lock(sb); |
bd4c625c | 2754 | |
a9dd3643 | 2755 | rs = SB_DISK_SUPER_BLOCK(sb); |
bd4c625c LT |
2756 | |
2757 | /* read journal header */ | |
a9dd3643 JM |
2758 | bhjh = journal_bread(sb, |
2759 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
2760 | SB_ONDISK_JOURNAL_SIZE(sb)); | |
bd4c625c | 2761 | if (!bhjh) { |
a9dd3643 | 2762 | reiserfs_warning(sb, "sh-459", |
45b03d5e | 2763 | "unable to read journal header"); |
bd4c625c LT |
2764 | goto free_and_return; |
2765 | } | |
2766 | jh = (struct reiserfs_journal_header *)(bhjh->b_data); | |
2767 | ||
2768 | /* make sure that journal matches to the super block */ | |
2769 | if (is_reiserfs_jr(rs) | |
2770 | && (le32_to_cpu(jh->jh_journal.jp_journal_magic) != | |
2771 | sb_jp_journal_magic(rs))) { | |
a9dd3643 | 2772 | reiserfs_warning(sb, "sh-460", |
45b03d5e JM |
2773 | "journal header magic %x (device %s) does " |
2774 | "not match to magic found in super block %x", | |
2775 | jh->jh_journal.jp_journal_magic, | |
bd4c625c LT |
2776 | bdevname(journal->j_dev_bd, b), |
2777 | sb_jp_journal_magic(rs)); | |
2778 | brelse(bhjh); | |
2779 | goto free_and_return; | |
2780 | } | |
2781 | ||
2782 | journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max); | |
2783 | journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch); | |
2784 | journal->j_max_commit_age = | |
2785 | le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age); | |
2786 | journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE; | |
2787 | ||
a9dd3643 | 2788 | if (check_advise_trans_params(sb, journal) != 0) |
cf3d0b81 | 2789 | goto free_and_return; |
bd4c625c LT |
2790 | journal->j_default_max_commit_age = journal->j_max_commit_age; |
2791 | ||
2792 | if (commit_max_age != 0) { | |
2793 | journal->j_max_commit_age = commit_max_age; | |
2794 | journal->j_max_trans_age = commit_max_age; | |
2795 | } | |
2796 | ||
a9dd3643 | 2797 | reiserfs_info(sb, "journal params: device %s, size %u, " |
bd4c625c LT |
2798 | "journal first block %u, max trans len %u, max batch %u, " |
2799 | "max commit age %u, max trans age %u\n", | |
2800 | bdevname(journal->j_dev_bd, b), | |
a9dd3643 JM |
2801 | SB_ONDISK_JOURNAL_SIZE(sb), |
2802 | SB_ONDISK_JOURNAL_1st_BLOCK(sb), | |
bd4c625c LT |
2803 | journal->j_trans_max, |
2804 | journal->j_max_batch, | |
2805 | journal->j_max_commit_age, journal->j_max_trans_age); | |
2806 | ||
2807 | brelse(bhjh); | |
2808 | ||
2809 | journal->j_list_bitmap_index = 0; | |
a9dd3643 | 2810 | journal_list_init(sb); |
bd4c625c LT |
2811 | |
2812 | memset(journal->j_list_hash_table, 0, | |
2813 | JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *)); | |
2814 | ||
2815 | INIT_LIST_HEAD(&journal->j_dirty_buffers); | |
2816 | spin_lock_init(&journal->j_dirty_buffers_lock); | |
2817 | ||
2818 | journal->j_start = 0; | |
2819 | journal->j_len = 0; | |
2820 | journal->j_len_alloc = 0; | |
2821 | atomic_set(&(journal->j_wcount), 0); | |
2822 | atomic_set(&(journal->j_async_throttle), 0); | |
2823 | journal->j_bcount = 0; | |
2824 | journal->j_trans_start_time = 0; | |
2825 | journal->j_last = NULL; | |
2826 | journal->j_first = NULL; | |
2827 | init_waitqueue_head(&(journal->j_join_wait)); | |
f68215c4 | 2828 | mutex_init(&journal->j_mutex); |
afe70259 | 2829 | mutex_init(&journal->j_flush_mutex); |
bd4c625c LT |
2830 | |
2831 | journal->j_trans_id = 10; | |
2832 | journal->j_mount_id = 10; | |
2833 | journal->j_state = 0; | |
2834 | atomic_set(&(journal->j_jlock), 0); | |
bbec9191 | 2835 | reiserfs_write_unlock(sb); |
bd4c625c | 2836 | journal->j_cnode_free_list = allocate_cnodes(num_cnodes); |
bbec9191 | 2837 | reiserfs_write_lock(sb); |
bd4c625c LT |
2838 | journal->j_cnode_free_orig = journal->j_cnode_free_list; |
2839 | journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0; | |
2840 | journal->j_cnode_used = 0; | |
2841 | journal->j_must_wait = 0; | |
2842 | ||
576f6d79 | 2843 | if (journal->j_cnode_free == 0) { |
a9dd3643 | 2844 | reiserfs_warning(sb, "journal-2004", "Journal cnode memory " |
576f6d79 JM |
2845 | "allocation failed (%ld bytes). Journal is " |
2846 | "too large for available memory. Usually " | |
2847 | "this is due to a journal that is too large.", | |
2848 | sizeof (struct reiserfs_journal_cnode) * num_cnodes); | |
2849 | goto free_and_return; | |
2850 | } | |
2851 | ||
a9dd3643 | 2852 | init_journal_hash(sb); |
bd4c625c | 2853 | jl = journal->j_current_jl; |
a9dd3643 | 2854 | jl->j_list_bitmap = get_list_bitmap(sb, jl); |
bd4c625c | 2855 | if (!jl->j_list_bitmap) { |
a9dd3643 | 2856 | reiserfs_warning(sb, "journal-2005", |
45b03d5e | 2857 | "get_list_bitmap failed for journal list 0"); |
bd4c625c LT |
2858 | goto free_and_return; |
2859 | } | |
a9dd3643 JM |
2860 | if (journal_read(sb) < 0) { |
2861 | reiserfs_warning(sb, "reiserfs-2006", | |
45b03d5e | 2862 | "Replay Failure, unable to mount"); |
bd4c625c LT |
2863 | goto free_and_return; |
2864 | } | |
2865 | ||
2866 | reiserfs_mounted_fs_count++; | |
48f6ba5e FW |
2867 | if (reiserfs_mounted_fs_count <= 1) { |
2868 | reiserfs_write_unlock(sb); | |
28aadf51 | 2869 | commit_wq = alloc_workqueue("reiserfs", WQ_MEM_RECLAIM, 0); |
48f6ba5e FW |
2870 | reiserfs_write_lock(sb); |
2871 | } | |
bd4c625c | 2872 | |
c4028958 | 2873 | INIT_DELAYED_WORK(&journal->j_work, flush_async_commits); |
a9dd3643 | 2874 | journal->j_work_sb = sb; |
bd4c625c LT |
2875 | return 0; |
2876 | free_and_return: | |
a9dd3643 | 2877 | free_journal_ram(sb); |
bd4c625c | 2878 | return 1; |
1da177e4 LT |
2879 | } |
2880 | ||
2881 | /* | |
2882 | ** test for a polite end of the current transaction. Used by file_write, and should | |
2883 | ** be used by delete to make sure they don't write more than can fit inside a single | |
2884 | ** transaction | |
2885 | */ | |
bd4c625c LT |
2886 | int journal_transaction_should_end(struct reiserfs_transaction_handle *th, |
2887 | int new_alloc) | |
2888 | { | |
2889 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2890 | time_t now = get_seconds(); | |
2891 | /* cannot restart while nested */ | |
2892 | BUG_ON(!th->t_trans_id); | |
2893 | if (th->t_refcount > 1) | |
2894 | return 0; | |
2895 | if (journal->j_must_wait > 0 || | |
2896 | (journal->j_len_alloc + new_alloc) >= journal->j_max_batch || | |
2897 | atomic_read(&(journal->j_jlock)) || | |
2898 | (now - journal->j_trans_start_time) > journal->j_max_trans_age || | |
2899 | journal->j_cnode_free < (journal->j_trans_max * 3)) { | |
2900 | return 1; | |
2901 | } | |
6ae1ea44 CM |
2902 | /* protected by the BKL here */ |
2903 | journal->j_len_alloc += new_alloc; | |
2904 | th->t_blocks_allocated += new_alloc ; | |
bd4c625c | 2905 | return 0; |
1da177e4 LT |
2906 | } |
2907 | ||
0222e657 | 2908 | /* this must be called inside a transaction, and requires the |
1da177e4 LT |
2909 | ** kernel_lock to be held |
2910 | */ | |
bd4c625c LT |
2911 | void reiserfs_block_writes(struct reiserfs_transaction_handle *th) |
2912 | { | |
2913 | struct reiserfs_journal *journal = SB_JOURNAL(th->t_super); | |
2914 | BUG_ON(!th->t_trans_id); | |
2915 | journal->j_must_wait = 1; | |
2916 | set_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2917 | return; | |
1da177e4 LT |
2918 | } |
2919 | ||
2920 | /* this must be called without a transaction started, and does not | |
2921 | ** require BKL | |
2922 | */ | |
bd4c625c LT |
2923 | void reiserfs_allow_writes(struct super_block *s) |
2924 | { | |
2925 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2926 | clear_bit(J_WRITERS_BLOCKED, &journal->j_state); | |
2927 | wake_up(&journal->j_join_wait); | |
1da177e4 LT |
2928 | } |
2929 | ||
2930 | /* this must be called without a transaction started, and does not | |
2931 | ** require BKL | |
2932 | */ | |
bd4c625c LT |
2933 | void reiserfs_wait_on_write_block(struct super_block *s) |
2934 | { | |
2935 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2936 | wait_event(journal->j_join_wait, | |
2937 | !test_bit(J_WRITERS_BLOCKED, &journal->j_state)); | |
2938 | } | |
2939 | ||
2940 | static void queue_log_writer(struct super_block *s) | |
2941 | { | |
2942 | wait_queue_t wait; | |
2943 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2944 | set_bit(J_WRITERS_QUEUED, &journal->j_state); | |
2945 | ||
2946 | /* | |
2947 | * we don't want to use wait_event here because | |
2948 | * we only want to wait once. | |
2949 | */ | |
2950 | init_waitqueue_entry(&wait, current); | |
2951 | add_wait_queue(&journal->j_join_wait, &wait); | |
1da177e4 | 2952 | set_current_state(TASK_UNINTERRUPTIBLE); |
8ebc4232 FW |
2953 | if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) { |
2954 | reiserfs_write_unlock(s); | |
bd4c625c | 2955 | schedule(); |
8ebc4232 FW |
2956 | reiserfs_write_lock(s); |
2957 | } | |
5ab2f7e0 | 2958 | __set_current_state(TASK_RUNNING); |
bd4c625c LT |
2959 | remove_wait_queue(&journal->j_join_wait, &wait); |
2960 | } | |
2961 | ||
2962 | static void wake_queued_writers(struct super_block *s) | |
2963 | { | |
2964 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
2965 | if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state)) | |
2966 | wake_up(&journal->j_join_wait); | |
2967 | } | |
2968 | ||
600ed416 | 2969 | static void let_transaction_grow(struct super_block *sb, unsigned int trans_id) |
bd4c625c LT |
2970 | { |
2971 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
2972 | unsigned long bcount = journal->j_bcount; | |
2973 | while (1) { | |
8ebc4232 | 2974 | reiserfs_write_unlock(sb); |
041e0e3b | 2975 | schedule_timeout_uninterruptible(1); |
8ebc4232 | 2976 | reiserfs_write_lock(sb); |
bd4c625c LT |
2977 | journal->j_current_jl->j_state |= LIST_COMMIT_PENDING; |
2978 | while ((atomic_read(&journal->j_wcount) > 0 || | |
2979 | atomic_read(&journal->j_jlock)) && | |
2980 | journal->j_trans_id == trans_id) { | |
2981 | queue_log_writer(sb); | |
2982 | } | |
2983 | if (journal->j_trans_id != trans_id) | |
2984 | break; | |
2985 | if (bcount == journal->j_bcount) | |
2986 | break; | |
2987 | bcount = journal->j_bcount; | |
1da177e4 | 2988 | } |
1da177e4 LT |
2989 | } |
2990 | ||
2991 | /* join == true if you must join an existing transaction. | |
2992 | ** join == false if you can deal with waiting for others to finish | |
2993 | ** | |
2994 | ** this will block until the transaction is joinable. send the number of blocks you | |
2995 | ** expect to use in nblocks. | |
2996 | */ | |
bd4c625c | 2997 | static int do_journal_begin_r(struct reiserfs_transaction_handle *th, |
a9dd3643 | 2998 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
2999 | int join) |
3000 | { | |
3001 | time_t now = get_seconds(); | |
600ed416 | 3002 | unsigned int old_trans_id; |
a9dd3643 | 3003 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3004 | struct reiserfs_transaction_handle myth; |
3005 | int sched_count = 0; | |
3006 | int retval; | |
3007 | ||
a9dd3643 | 3008 | reiserfs_check_lock_depth(sb, "journal_begin"); |
14a61442 | 3009 | BUG_ON(nblocks > journal->j_trans_max); |
bd4c625c | 3010 | |
a9dd3643 | 3011 | PROC_INFO_INC(sb, journal.journal_being); |
bd4c625c LT |
3012 | /* set here for journal_join */ |
3013 | th->t_refcount = 1; | |
a9dd3643 | 3014 | th->t_super = sb; |
bd4c625c LT |
3015 | |
3016 | relock: | |
a9dd3643 | 3017 | lock_journal(sb); |
bd4c625c | 3018 | if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) { |
a9dd3643 | 3019 | unlock_journal(sb); |
bd4c625c LT |
3020 | retval = journal->j_errno; |
3021 | goto out_fail; | |
3022 | } | |
3023 | journal->j_bcount++; | |
3024 | ||
3025 | if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) { | |
a9dd3643 | 3026 | unlock_journal(sb); |
8ebc4232 | 3027 | reiserfs_write_unlock(sb); |
a9dd3643 | 3028 | reiserfs_wait_on_write_block(sb); |
8ebc4232 | 3029 | reiserfs_write_lock(sb); |
a9dd3643 | 3030 | PROC_INFO_INC(sb, journal.journal_relock_writers); |
bd4c625c LT |
3031 | goto relock; |
3032 | } | |
3033 | now = get_seconds(); | |
3034 | ||
3035 | /* if there is no room in the journal OR | |
0222e657 | 3036 | ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning |
bd4c625c LT |
3037 | ** we don't sleep if there aren't other writers |
3038 | */ | |
3039 | ||
3040 | if ((!join && journal->j_must_wait > 0) || | |
3041 | (!join | |
3042 | && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch) | |
3043 | || (!join && atomic_read(&journal->j_wcount) > 0 | |
3044 | && journal->j_trans_start_time > 0 | |
3045 | && (now - journal->j_trans_start_time) > | |
3046 | journal->j_max_trans_age) || (!join | |
3047 | && atomic_read(&journal->j_jlock)) | |
3048 | || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) { | |
3049 | ||
3050 | old_trans_id = journal->j_trans_id; | |
a9dd3643 | 3051 | unlock_journal(sb); /* allow others to finish this transaction */ |
bd4c625c LT |
3052 | |
3053 | if (!join && (journal->j_len_alloc + nblocks + 2) >= | |
3054 | journal->j_max_batch && | |
3055 | ((journal->j_len + nblocks + 2) * 100) < | |
3056 | (journal->j_len_alloc * 75)) { | |
3057 | if (atomic_read(&journal->j_wcount) > 10) { | |
3058 | sched_count++; | |
a9dd3643 | 3059 | queue_log_writer(sb); |
bd4c625c LT |
3060 | goto relock; |
3061 | } | |
3062 | } | |
3063 | /* don't mess with joining the transaction if all we have to do is | |
3064 | * wait for someone else to do a commit | |
3065 | */ | |
3066 | if (atomic_read(&journal->j_jlock)) { | |
3067 | while (journal->j_trans_id == old_trans_id && | |
3068 | atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3069 | queue_log_writer(sb); |
bd4c625c LT |
3070 | } |
3071 | goto relock; | |
3072 | } | |
a9dd3643 | 3073 | retval = journal_join(&myth, sb, 1); |
bd4c625c LT |
3074 | if (retval) |
3075 | goto out_fail; | |
3076 | ||
3077 | /* someone might have ended the transaction while we joined */ | |
3078 | if (old_trans_id != journal->j_trans_id) { | |
a9dd3643 | 3079 | retval = do_journal_end(&myth, sb, 1, 0); |
bd4c625c | 3080 | } else { |
a9dd3643 | 3081 | retval = do_journal_end(&myth, sb, 1, COMMIT_NOW); |
bd4c625c LT |
3082 | } |
3083 | ||
3084 | if (retval) | |
3085 | goto out_fail; | |
3086 | ||
a9dd3643 | 3087 | PROC_INFO_INC(sb, journal.journal_relock_wcount); |
bd4c625c LT |
3088 | goto relock; |
3089 | } | |
3090 | /* we are the first writer, set trans_id */ | |
3091 | if (journal->j_trans_start_time == 0) { | |
3092 | journal->j_trans_start_time = get_seconds(); | |
3093 | } | |
3094 | atomic_inc(&(journal->j_wcount)); | |
3095 | journal->j_len_alloc += nblocks; | |
3096 | th->t_blocks_logged = 0; | |
3097 | th->t_blocks_allocated = nblocks; | |
3098 | th->t_trans_id = journal->j_trans_id; | |
a9dd3643 | 3099 | unlock_journal(sb); |
bd4c625c | 3100 | INIT_LIST_HEAD(&th->t_list); |
bd4c625c LT |
3101 | return 0; |
3102 | ||
3103 | out_fail: | |
3104 | memset(th, 0, sizeof(*th)); | |
3105 | /* Re-set th->t_super, so we can properly keep track of how many | |
3106 | * persistent transactions there are. We need to do this so if this | |
3107 | * call is part of a failed restart_transaction, we can free it later */ | |
a9dd3643 | 3108 | th->t_super = sb; |
bd4c625c LT |
3109 | return retval; |
3110 | } | |
3111 | ||
3112 | struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct | |
3113 | super_block | |
3114 | *s, | |
3115 | int nblocks) | |
3116 | { | |
3117 | int ret; | |
3118 | struct reiserfs_transaction_handle *th; | |
3119 | ||
3120 | /* if we're nesting into an existing transaction. It will be | |
3121 | ** persistent on its own | |
3122 | */ | |
3123 | if (reiserfs_transaction_running(s)) { | |
3124 | th = current->journal_info; | |
3125 | th->t_refcount++; | |
14a61442 ES |
3126 | BUG_ON(th->t_refcount < 2); |
3127 | ||
bd4c625c LT |
3128 | return th; |
3129 | } | |
d739b42b | 3130 | th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS); |
bd4c625c LT |
3131 | if (!th) |
3132 | return NULL; | |
3133 | ret = journal_begin(th, s, nblocks); | |
3134 | if (ret) { | |
d739b42b | 3135 | kfree(th); |
bd4c625c LT |
3136 | return NULL; |
3137 | } | |
3138 | ||
3139 | SB_JOURNAL(s)->j_persistent_trans++; | |
3140 | return th; | |
3141 | } | |
3142 | ||
3143 | int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th) | |
3144 | { | |
3145 | struct super_block *s = th->t_super; | |
3146 | int ret = 0; | |
3147 | if (th->t_trans_id) | |
3148 | ret = journal_end(th, th->t_super, th->t_blocks_allocated); | |
3149 | else | |
3150 | ret = -EIO; | |
3151 | if (th->t_refcount == 0) { | |
3152 | SB_JOURNAL(s)->j_persistent_trans--; | |
d739b42b | 3153 | kfree(th); |
bd4c625c LT |
3154 | } |
3155 | return ret; | |
3156 | } | |
3157 | ||
3158 | static int journal_join(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3159 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3160 | { |
3161 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3162 | ||
3163 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
3164 | ** pointer | |
3165 | */ | |
3166 | th->t_handle_save = cur_th; | |
14a61442 | 3167 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
a9dd3643 | 3168 | return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN); |
bd4c625c LT |
3169 | } |
3170 | ||
3171 | int journal_join_abort(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3172 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3173 | { |
3174 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3175 | ||
3176 | /* this keeps do_journal_end from NULLing out the current->journal_info | |
3177 | ** pointer | |
3178 | */ | |
3179 | th->t_handle_save = cur_th; | |
14a61442 | 3180 | BUG_ON(cur_th && cur_th->t_refcount > 1); |
a9dd3643 | 3181 | return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT); |
bd4c625c LT |
3182 | } |
3183 | ||
3184 | int journal_begin(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3185 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3186 | { |
3187 | struct reiserfs_transaction_handle *cur_th = current->journal_info; | |
3188 | int ret; | |
3189 | ||
3190 | th->t_handle_save = NULL; | |
3191 | if (cur_th) { | |
3192 | /* we are nesting into the current transaction */ | |
a9dd3643 | 3193 | if (cur_th->t_super == sb) { |
bd4c625c LT |
3194 | BUG_ON(!cur_th->t_refcount); |
3195 | cur_th->t_refcount++; | |
3196 | memcpy(th, cur_th, sizeof(*th)); | |
3197 | if (th->t_refcount <= 1) | |
a9dd3643 | 3198 | reiserfs_warning(sb, "reiserfs-2005", |
45b03d5e JM |
3199 | "BAD: refcount <= 1, but " |
3200 | "journal_info != 0"); | |
bd4c625c LT |
3201 | return 0; |
3202 | } else { | |
3203 | /* we've ended up with a handle from a different filesystem. | |
3204 | ** save it and restore on journal_end. This should never | |
3205 | ** really happen... | |
3206 | */ | |
a9dd3643 | 3207 | reiserfs_warning(sb, "clm-2100", |
45b03d5e | 3208 | "nesting info a different FS"); |
bd4c625c LT |
3209 | th->t_handle_save = current->journal_info; |
3210 | current->journal_info = th; | |
3211 | } | |
1da177e4 | 3212 | } else { |
bd4c625c LT |
3213 | current->journal_info = th; |
3214 | } | |
a9dd3643 | 3215 | ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG); |
14a61442 | 3216 | BUG_ON(current->journal_info != th); |
1da177e4 | 3217 | |
bd4c625c LT |
3218 | /* I guess this boils down to being the reciprocal of clm-2100 above. |
3219 | * If do_journal_begin_r fails, we need to put it back, since journal_end | |
3220 | * won't be called to do it. */ | |
3221 | if (ret) | |
3222 | current->journal_info = th->t_handle_save; | |
3223 | else | |
3224 | BUG_ON(!th->t_refcount); | |
1da177e4 | 3225 | |
bd4c625c | 3226 | return ret; |
1da177e4 LT |
3227 | } |
3228 | ||
3229 | /* | |
3230 | ** puts bh into the current transaction. If it was already there, reorders removes the | |
3231 | ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order). | |
3232 | ** | |
3233 | ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the | |
3234 | ** transaction is committed. | |
0222e657 | 3235 | ** |
1da177e4 LT |
3236 | ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len. |
3237 | */ | |
bd4c625c | 3238 | int journal_mark_dirty(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3239 | struct super_block *sb, struct buffer_head *bh) |
bd4c625c | 3240 | { |
a9dd3643 | 3241 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3242 | struct reiserfs_journal_cnode *cn = NULL; |
3243 | int count_already_incd = 0; | |
3244 | int prepared = 0; | |
3245 | BUG_ON(!th->t_trans_id); | |
3246 | ||
a9dd3643 | 3247 | PROC_INFO_INC(sb, journal.mark_dirty); |
bd4c625c | 3248 | if (th->t_trans_id != journal->j_trans_id) { |
c3a9c210 JM |
3249 | reiserfs_panic(th->t_super, "journal-1577", |
3250 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3251 | th->t_trans_id, journal->j_trans_id); |
3252 | } | |
3253 | ||
a9dd3643 | 3254 | sb->s_dirt = 1; |
bd4c625c LT |
3255 | |
3256 | prepared = test_clear_buffer_journal_prepared(bh); | |
3257 | clear_buffer_journal_restore_dirty(bh); | |
3258 | /* already in this transaction, we are done */ | |
3259 | if (buffer_journaled(bh)) { | |
a9dd3643 | 3260 | PROC_INFO_INC(sb, journal.mark_dirty_already); |
bd4c625c LT |
3261 | return 0; |
3262 | } | |
3263 | ||
3264 | /* this must be turned into a panic instead of a warning. We can't allow | |
3265 | ** a dirty or journal_dirty or locked buffer to be logged, as some changes | |
3266 | ** could get to disk too early. NOT GOOD. | |
3267 | */ | |
3268 | if (!prepared || buffer_dirty(bh)) { | |
a9dd3643 | 3269 | reiserfs_warning(sb, "journal-1777", |
45b03d5e | 3270 | "buffer %llu bad state " |
bd4c625c LT |
3271 | "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT", |
3272 | (unsigned long long)bh->b_blocknr, | |
3273 | prepared ? ' ' : '!', | |
3274 | buffer_locked(bh) ? ' ' : '!', | |
3275 | buffer_dirty(bh) ? ' ' : '!', | |
3276 | buffer_journal_dirty(bh) ? ' ' : '!'); | |
3277 | } | |
3278 | ||
3279 | if (atomic_read(&(journal->j_wcount)) <= 0) { | |
a9dd3643 | 3280 | reiserfs_warning(sb, "journal-1409", |
45b03d5e | 3281 | "returning because j_wcount was %d", |
bd4c625c LT |
3282 | atomic_read(&(journal->j_wcount))); |
3283 | return 1; | |
3284 | } | |
0222e657 | 3285 | /* this error means I've screwed up, and we've overflowed the transaction. |
bd4c625c LT |
3286 | ** Nothing can be done here, except make the FS readonly or panic. |
3287 | */ | |
3288 | if (journal->j_len >= journal->j_trans_max) { | |
c3a9c210 JM |
3289 | reiserfs_panic(th->t_super, "journal-1413", |
3290 | "j_len (%lu) is too big", | |
bd4c625c LT |
3291 | journal->j_len); |
3292 | } | |
3293 | ||
3294 | if (buffer_journal_dirty(bh)) { | |
3295 | count_already_incd = 1; | |
a9dd3643 | 3296 | PROC_INFO_INC(sb, journal.mark_dirty_notjournal); |
bd4c625c LT |
3297 | clear_buffer_journal_dirty(bh); |
3298 | } | |
3299 | ||
3300 | if (journal->j_len > journal->j_len_alloc) { | |
3301 | journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT; | |
3302 | } | |
3303 | ||
3304 | set_buffer_journaled(bh); | |
3305 | ||
3306 | /* now put this guy on the end */ | |
3307 | if (!cn) { | |
a9dd3643 | 3308 | cn = get_cnode(sb); |
bd4c625c | 3309 | if (!cn) { |
a9dd3643 | 3310 | reiserfs_panic(sb, "journal-4", "get_cnode failed!"); |
bd4c625c LT |
3311 | } |
3312 | ||
3313 | if (th->t_blocks_logged == th->t_blocks_allocated) { | |
3314 | th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT; | |
3315 | journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT; | |
3316 | } | |
3317 | th->t_blocks_logged++; | |
3318 | journal->j_len++; | |
3319 | ||
3320 | cn->bh = bh; | |
3321 | cn->blocknr = bh->b_blocknr; | |
a9dd3643 | 3322 | cn->sb = sb; |
bd4c625c LT |
3323 | cn->jlist = NULL; |
3324 | insert_journal_hash(journal->j_hash_table, cn); | |
3325 | if (!count_already_incd) { | |
3326 | get_bh(bh); | |
3327 | } | |
3328 | } | |
3329 | cn->next = NULL; | |
3330 | cn->prev = journal->j_last; | |
3331 | cn->bh = bh; | |
3332 | if (journal->j_last) { | |
3333 | journal->j_last->next = cn; | |
3334 | journal->j_last = cn; | |
3335 | } else { | |
3336 | journal->j_first = cn; | |
3337 | journal->j_last = cn; | |
3338 | } | |
3339 | return 0; | |
3340 | } | |
3341 | ||
3342 | int journal_end(struct reiserfs_transaction_handle *th, | |
a9dd3643 | 3343 | struct super_block *sb, unsigned long nblocks) |
bd4c625c LT |
3344 | { |
3345 | if (!current->journal_info && th->t_refcount > 1) | |
a9dd3643 | 3346 | reiserfs_warning(sb, "REISER-NESTING", |
45b03d5e | 3347 | "th NULL, refcount %d", th->t_refcount); |
bd4c625c LT |
3348 | |
3349 | if (!th->t_trans_id) { | |
3350 | WARN_ON(1); | |
3351 | return -EIO; | |
3352 | } | |
3353 | ||
3354 | th->t_refcount--; | |
3355 | if (th->t_refcount > 0) { | |
3356 | struct reiserfs_transaction_handle *cur_th = | |
3357 | current->journal_info; | |
3358 | ||
3359 | /* we aren't allowed to close a nested transaction on a different | |
3360 | ** filesystem from the one in the task struct | |
3361 | */ | |
14a61442 | 3362 | BUG_ON(cur_th->t_super != th->t_super); |
bd4c625c LT |
3363 | |
3364 | if (th != cur_th) { | |
3365 | memcpy(current->journal_info, th, sizeof(*th)); | |
3366 | th->t_trans_id = 0; | |
3367 | } | |
3368 | return 0; | |
3369 | } else { | |
a9dd3643 | 3370 | return do_journal_end(th, sb, nblocks, 0); |
bd4c625c | 3371 | } |
1da177e4 LT |
3372 | } |
3373 | ||
0222e657 | 3374 | /* removes from the current transaction, relsing and descrementing any counters. |
1da177e4 LT |
3375 | ** also files the removed buffer directly onto the clean list |
3376 | ** | |
3377 | ** called by journal_mark_freed when a block has been deleted | |
3378 | ** | |
3379 | ** returns 1 if it cleaned and relsed the buffer. 0 otherwise | |
3380 | */ | |
a9dd3643 | 3381 | static int remove_from_transaction(struct super_block *sb, |
bd4c625c LT |
3382 | b_blocknr_t blocknr, int already_cleaned) |
3383 | { | |
3384 | struct buffer_head *bh; | |
3385 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3386 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3387 | int ret = 0; |
3388 | ||
a9dd3643 | 3389 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3390 | if (!cn || !cn->bh) { |
3391 | return ret; | |
3392 | } | |
3393 | bh = cn->bh; | |
3394 | if (cn->prev) { | |
3395 | cn->prev->next = cn->next; | |
3396 | } | |
3397 | if (cn->next) { | |
3398 | cn->next->prev = cn->prev; | |
3399 | } | |
3400 | if (cn == journal->j_first) { | |
3401 | journal->j_first = cn->next; | |
3402 | } | |
3403 | if (cn == journal->j_last) { | |
3404 | journal->j_last = cn->prev; | |
3405 | } | |
3406 | if (bh) | |
a9dd3643 | 3407 | remove_journal_hash(sb, journal->j_hash_table, NULL, |
bd4c625c LT |
3408 | bh->b_blocknr, 0); |
3409 | clear_buffer_journaled(bh); /* don't log this one */ | |
3410 | ||
3411 | if (!already_cleaned) { | |
3412 | clear_buffer_journal_dirty(bh); | |
3413 | clear_buffer_dirty(bh); | |
3414 | clear_buffer_journal_test(bh); | |
3415 | put_bh(bh); | |
3416 | if (atomic_read(&(bh->b_count)) < 0) { | |
a9dd3643 | 3417 | reiserfs_warning(sb, "journal-1752", |
45b03d5e | 3418 | "b_count < 0"); |
bd4c625c LT |
3419 | } |
3420 | ret = 1; | |
3421 | } | |
3422 | journal->j_len--; | |
3423 | journal->j_len_alloc--; | |
a9dd3643 | 3424 | free_cnode(sb, cn); |
bd4c625c | 3425 | return ret; |
1da177e4 LT |
3426 | } |
3427 | ||
3428 | /* | |
3429 | ** for any cnode in a journal list, it can only be dirtied of all the | |
0779bf2d | 3430 | ** transactions that include it are committed to disk. |
1da177e4 LT |
3431 | ** this checks through each transaction, and returns 1 if you are allowed to dirty, |
3432 | ** and 0 if you aren't | |
3433 | ** | |
3434 | ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log | |
3435 | ** blocks for a given transaction on disk | |
3436 | ** | |
3437 | */ | |
bd4c625c LT |
3438 | static int can_dirty(struct reiserfs_journal_cnode *cn) |
3439 | { | |
3440 | struct super_block *sb = cn->sb; | |
3441 | b_blocknr_t blocknr = cn->blocknr; | |
3442 | struct reiserfs_journal_cnode *cur = cn->hprev; | |
3443 | int can_dirty = 1; | |
3444 | ||
3445 | /* first test hprev. These are all newer than cn, so any node here | |
3446 | ** with the same block number and dev means this node can't be sent | |
3447 | ** to disk right now. | |
3448 | */ | |
3449 | while (cur && can_dirty) { | |
3450 | if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb && | |
3451 | cur->blocknr == blocknr) { | |
3452 | can_dirty = 0; | |
3453 | } | |
3454 | cur = cur->hprev; | |
3455 | } | |
3456 | /* then test hnext. These are all older than cn. As long as they | |
3457 | ** are committed to the log, it is safe to write cn to disk | |
3458 | */ | |
3459 | cur = cn->hnext; | |
3460 | while (cur && can_dirty) { | |
3461 | if (cur->jlist && cur->jlist->j_len > 0 && | |
3462 | atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh && | |
3463 | cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) { | |
3464 | can_dirty = 0; | |
3465 | } | |
3466 | cur = cur->hnext; | |
3467 | } | |
3468 | return can_dirty; | |
1da177e4 LT |
3469 | } |
3470 | ||
3471 | /* syncs the commit blocks, but does not force the real buffers to disk | |
0222e657 | 3472 | ** will wait until the current transaction is done/committed before returning |
1da177e4 | 3473 | */ |
bd4c625c | 3474 | int journal_end_sync(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3475 | struct super_block *sb, unsigned long nblocks) |
bd4c625c | 3476 | { |
a9dd3643 | 3477 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
1da177e4 | 3478 | |
bd4c625c LT |
3479 | BUG_ON(!th->t_trans_id); |
3480 | /* you can sync while nested, very, very bad */ | |
14a61442 | 3481 | BUG_ON(th->t_refcount > 1); |
bd4c625c | 3482 | if (journal->j_len == 0) { |
a9dd3643 | 3483 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3484 | 1); |
a9dd3643 | 3485 | journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3486 | } |
a9dd3643 | 3487 | return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT); |
1da177e4 LT |
3488 | } |
3489 | ||
3490 | /* | |
3491 | ** writeback the pending async commits to disk | |
3492 | */ | |
c4028958 | 3493 | static void flush_async_commits(struct work_struct *work) |
bd4c625c | 3494 | { |
c4028958 DH |
3495 | struct reiserfs_journal *journal = |
3496 | container_of(work, struct reiserfs_journal, j_work.work); | |
a9dd3643 | 3497 | struct super_block *sb = journal->j_work_sb; |
bd4c625c LT |
3498 | struct reiserfs_journal_list *jl; |
3499 | struct list_head *entry; | |
3500 | ||
8ebc4232 | 3501 | reiserfs_write_lock(sb); |
bd4c625c LT |
3502 | if (!list_empty(&journal->j_journal_list)) { |
3503 | /* last entry is the youngest, commit it and you get everything */ | |
3504 | entry = journal->j_journal_list.prev; | |
3505 | jl = JOURNAL_LIST_ENTRY(entry); | |
a9dd3643 | 3506 | flush_commit_list(sb, jl, 1); |
bd4c625c | 3507 | } |
8ebc4232 | 3508 | reiserfs_write_unlock(sb); |
1da177e4 LT |
3509 | } |
3510 | ||
3511 | /* | |
3512 | ** flushes any old transactions to disk | |
3513 | ** ends the current transaction if it is too old | |
3514 | */ | |
a9dd3643 | 3515 | int reiserfs_flush_old_commits(struct super_block *sb) |
bd4c625c LT |
3516 | { |
3517 | time_t now; | |
3518 | struct reiserfs_transaction_handle th; | |
a9dd3643 | 3519 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3520 | |
3521 | now = get_seconds(); | |
3522 | /* safety check so we don't flush while we are replaying the log during | |
3523 | * mount | |
3524 | */ | |
3525 | if (list_empty(&journal->j_journal_list)) { | |
3526 | return 0; | |
3527 | } | |
3528 | ||
3529 | /* check the current transaction. If there are no writers, and it is | |
3530 | * too old, finish it, and force the commit blocks to disk | |
3531 | */ | |
3532 | if (atomic_read(&journal->j_wcount) <= 0 && | |
3533 | journal->j_trans_start_time > 0 && | |
3534 | journal->j_len > 0 && | |
3535 | (now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
a9dd3643 JM |
3536 | if (!journal_join(&th, sb, 1)) { |
3537 | reiserfs_prepare_for_journal(sb, | |
3538 | SB_BUFFER_WITH_SB(sb), | |
bd4c625c | 3539 | 1); |
a9dd3643 JM |
3540 | journal_mark_dirty(&th, sb, |
3541 | SB_BUFFER_WITH_SB(sb)); | |
bd4c625c LT |
3542 | |
3543 | /* we're only being called from kreiserfsd, it makes no sense to do | |
3544 | ** an async commit so that kreiserfsd can do it later | |
3545 | */ | |
a9dd3643 | 3546 | do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT); |
bd4c625c LT |
3547 | } |
3548 | } | |
a9dd3643 | 3549 | return sb->s_dirt; |
1da177e4 LT |
3550 | } |
3551 | ||
3552 | /* | |
3553 | ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit | |
0222e657 JM |
3554 | ** |
3555 | ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all | |
1da177e4 LT |
3556 | ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just |
3557 | ** flushes the commit list and returns 0. | |
3558 | ** | |
3559 | ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait. | |
0222e657 | 3560 | ** |
1da177e4 LT |
3561 | ** Note, we can't allow the journal_end to proceed while there are still writers in the log. |
3562 | */ | |
bd4c625c | 3563 | static int check_journal_end(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3564 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3565 | int flags) |
3566 | { | |
3567 | ||
3568 | time_t now; | |
3569 | int flush = flags & FLUSH_ALL; | |
3570 | int commit_now = flags & COMMIT_NOW; | |
3571 | int wait_on_commit = flags & WAIT; | |
3572 | struct reiserfs_journal_list *jl; | |
a9dd3643 | 3573 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3574 | |
3575 | BUG_ON(!th->t_trans_id); | |
3576 | ||
3577 | if (th->t_trans_id != journal->j_trans_id) { | |
c3a9c210 JM |
3578 | reiserfs_panic(th->t_super, "journal-1577", |
3579 | "handle trans id %ld != current trans id %ld", | |
bd4c625c LT |
3580 | th->t_trans_id, journal->j_trans_id); |
3581 | } | |
3582 | ||
3583 | journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged); | |
3584 | if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */ | |
3585 | atomic_dec(&(journal->j_wcount)); | |
3586 | } | |
3587 | ||
0222e657 | 3588 | /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released |
bd4c625c LT |
3589 | ** will be dealt with by next transaction that actually writes something, but should be taken |
3590 | ** care of in this trans | |
3591 | */ | |
14a61442 ES |
3592 | BUG_ON(journal->j_len == 0); |
3593 | ||
bd4c625c LT |
3594 | /* if wcount > 0, and we are called to with flush or commit_now, |
3595 | ** we wait on j_join_wait. We will wake up when the last writer has | |
3596 | ** finished the transaction, and started it on its way to the disk. | |
0222e657 | 3597 | ** Then, we flush the commit or journal list, and just return 0 |
bd4c625c LT |
3598 | ** because the rest of journal end was already done for this transaction. |
3599 | */ | |
3600 | if (atomic_read(&(journal->j_wcount)) > 0) { | |
3601 | if (flush || commit_now) { | |
3602 | unsigned trans_id; | |
3603 | ||
3604 | jl = journal->j_current_jl; | |
3605 | trans_id = jl->j_trans_id; | |
3606 | if (wait_on_commit) | |
3607 | jl->j_state |= LIST_COMMIT_PENDING; | |
3608 | atomic_set(&(journal->j_jlock), 1); | |
3609 | if (flush) { | |
3610 | journal->j_next_full_flush = 1; | |
3611 | } | |
a9dd3643 | 3612 | unlock_journal(sb); |
bd4c625c LT |
3613 | |
3614 | /* sleep while the current transaction is still j_jlocked */ | |
3615 | while (journal->j_trans_id == trans_id) { | |
3616 | if (atomic_read(&journal->j_jlock)) { | |
a9dd3643 | 3617 | queue_log_writer(sb); |
bd4c625c | 3618 | } else { |
a9dd3643 | 3619 | lock_journal(sb); |
bd4c625c LT |
3620 | if (journal->j_trans_id == trans_id) { |
3621 | atomic_set(&(journal->j_jlock), | |
3622 | 1); | |
3623 | } | |
a9dd3643 | 3624 | unlock_journal(sb); |
bd4c625c LT |
3625 | } |
3626 | } | |
14a61442 ES |
3627 | BUG_ON(journal->j_trans_id == trans_id); |
3628 | ||
bd4c625c | 3629 | if (commit_now |
a9dd3643 | 3630 | && journal_list_still_alive(sb, trans_id) |
bd4c625c | 3631 | && wait_on_commit) { |
a9dd3643 | 3632 | flush_commit_list(sb, jl, 1); |
bd4c625c LT |
3633 | } |
3634 | return 0; | |
3635 | } | |
a9dd3643 | 3636 | unlock_journal(sb); |
bd4c625c LT |
3637 | return 0; |
3638 | } | |
3639 | ||
3640 | /* deal with old transactions where we are the last writers */ | |
3641 | now = get_seconds(); | |
3642 | if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) { | |
3643 | commit_now = 1; | |
3644 | journal->j_next_async_flush = 1; | |
3645 | } | |
3646 | /* don't batch when someone is waiting on j_join_wait */ | |
3647 | /* don't batch when syncing the commit or flushing the whole trans */ | |
3648 | if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock))) | |
3649 | && !flush && !commit_now && (journal->j_len < journal->j_max_batch) | |
3650 | && journal->j_len_alloc < journal->j_max_batch | |
3651 | && journal->j_cnode_free > (journal->j_trans_max * 3)) { | |
3652 | journal->j_bcount++; | |
a9dd3643 | 3653 | unlock_journal(sb); |
bd4c625c LT |
3654 | return 0; |
3655 | } | |
3656 | ||
a9dd3643 JM |
3657 | if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) { |
3658 | reiserfs_panic(sb, "journal-003", | |
c3a9c210 | 3659 | "j_start (%ld) is too high", |
bd4c625c LT |
3660 | journal->j_start); |
3661 | } | |
3662 | return 1; | |
1da177e4 LT |
3663 | } |
3664 | ||
3665 | /* | |
3666 | ** Does all the work that makes deleting blocks safe. | |
3667 | ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on. | |
0222e657 | 3668 | ** |
1da177e4 LT |
3669 | ** otherwise: |
3670 | ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes | |
3671 | ** before this transaction has finished. | |
3672 | ** | |
3673 | ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with | |
3674 | ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash, | |
3675 | ** the block can't be reallocated yet. | |
3676 | ** | |
3677 | ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list. | |
3678 | */ | |
bd4c625c | 3679 | int journal_mark_freed(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3680 | struct super_block *sb, b_blocknr_t blocknr) |
bd4c625c | 3681 | { |
a9dd3643 | 3682 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3683 | struct reiserfs_journal_cnode *cn = NULL; |
3684 | struct buffer_head *bh = NULL; | |
3685 | struct reiserfs_list_bitmap *jb = NULL; | |
3686 | int cleaned = 0; | |
3687 | BUG_ON(!th->t_trans_id); | |
3688 | ||
a9dd3643 | 3689 | cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr); |
bd4c625c LT |
3690 | if (cn && cn->bh) { |
3691 | bh = cn->bh; | |
3692 | get_bh(bh); | |
3693 | } | |
3694 | /* if it is journal new, we just remove it from this transaction */ | |
3695 | if (bh && buffer_journal_new(bh)) { | |
3696 | clear_buffer_journal_new(bh); | |
3697 | clear_prepared_bits(bh); | |
3698 | reiserfs_clean_and_file_buffer(bh); | |
a9dd3643 | 3699 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c LT |
3700 | } else { |
3701 | /* set the bit for this block in the journal bitmap for this transaction */ | |
3702 | jb = journal->j_current_jl->j_list_bitmap; | |
3703 | if (!jb) { | |
a9dd3643 | 3704 | reiserfs_panic(sb, "journal-1702", |
c3a9c210 | 3705 | "journal_list_bitmap is NULL"); |
bd4c625c | 3706 | } |
a9dd3643 | 3707 | set_bit_in_list_bitmap(sb, blocknr, jb); |
bd4c625c LT |
3708 | |
3709 | /* Note, the entire while loop is not allowed to schedule. */ | |
3710 | ||
3711 | if (bh) { | |
3712 | clear_prepared_bits(bh); | |
3713 | reiserfs_clean_and_file_buffer(bh); | |
3714 | } | |
a9dd3643 | 3715 | cleaned = remove_from_transaction(sb, blocknr, cleaned); |
bd4c625c LT |
3716 | |
3717 | /* find all older transactions with this block, make sure they don't try to write it out */ | |
a9dd3643 | 3718 | cn = get_journal_hash_dev(sb, journal->j_list_hash_table, |
bd4c625c LT |
3719 | blocknr); |
3720 | while (cn) { | |
a9dd3643 | 3721 | if (sb == cn->sb && blocknr == cn->blocknr) { |
bd4c625c LT |
3722 | set_bit(BLOCK_FREED, &cn->state); |
3723 | if (cn->bh) { | |
3724 | if (!cleaned) { | |
3725 | /* remove_from_transaction will brelse the buffer if it was | |
3726 | ** in the current trans | |
3727 | */ | |
3728 | clear_buffer_journal_dirty(cn-> | |
3729 | bh); | |
3730 | clear_buffer_dirty(cn->bh); | |
3731 | clear_buffer_journal_test(cn-> | |
3732 | bh); | |
3733 | cleaned = 1; | |
3734 | put_bh(cn->bh); | |
3735 | if (atomic_read | |
3736 | (&(cn->bh->b_count)) < 0) { | |
a9dd3643 | 3737 | reiserfs_warning(sb, |
45b03d5e JM |
3738 | "journal-2138", |
3739 | "cn->bh->b_count < 0"); | |
bd4c625c LT |
3740 | } |
3741 | } | |
3742 | if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */ | |
3743 | atomic_dec(& | |
3744 | (cn->jlist-> | |
3745 | j_nonzerolen)); | |
3746 | } | |
3747 | cn->bh = NULL; | |
3748 | } | |
3749 | } | |
3750 | cn = cn->hnext; | |
3751 | } | |
3752 | } | |
3753 | ||
398c95bd CM |
3754 | if (bh) |
3755 | release_buffer_page(bh); /* get_hash grabs the buffer */ | |
bd4c625c LT |
3756 | return 0; |
3757 | } | |
3758 | ||
3759 | void reiserfs_update_inode_transaction(struct inode *inode) | |
3760 | { | |
3761 | struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb); | |
3762 | REISERFS_I(inode)->i_jl = journal->j_current_jl; | |
3763 | REISERFS_I(inode)->i_trans_id = journal->j_trans_id; | |
1da177e4 LT |
3764 | } |
3765 | ||
3766 | /* | |
3767 | * returns -1 on error, 0 if no commits/barriers were done and 1 | |
3768 | * if a transaction was actually committed and the barrier was done | |
3769 | */ | |
3770 | static int __commit_trans_jl(struct inode *inode, unsigned long id, | |
bd4c625c | 3771 | struct reiserfs_journal_list *jl) |
1da177e4 | 3772 | { |
bd4c625c LT |
3773 | struct reiserfs_transaction_handle th; |
3774 | struct super_block *sb = inode->i_sb; | |
3775 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
3776 | int ret = 0; | |
3777 | ||
3778 | /* is it from the current transaction, or from an unknown transaction? */ | |
3779 | if (id == journal->j_trans_id) { | |
3780 | jl = journal->j_current_jl; | |
3781 | /* try to let other writers come in and grow this transaction */ | |
3782 | let_transaction_grow(sb, id); | |
3783 | if (journal->j_trans_id != id) { | |
3784 | goto flush_commit_only; | |
3785 | } | |
1da177e4 | 3786 | |
bd4c625c LT |
3787 | ret = journal_begin(&th, sb, 1); |
3788 | if (ret) | |
3789 | return ret; | |
3790 | ||
3791 | /* someone might have ended this transaction while we joined */ | |
3792 | if (journal->j_trans_id != id) { | |
3793 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), | |
3794 | 1); | |
3795 | journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb)); | |
3796 | ret = journal_end(&th, sb, 1); | |
3797 | goto flush_commit_only; | |
3798 | } | |
1da177e4 | 3799 | |
bd4c625c LT |
3800 | ret = journal_end_sync(&th, sb, 1); |
3801 | if (!ret) | |
3802 | ret = 1; | |
1da177e4 | 3803 | |
bd4c625c LT |
3804 | } else { |
3805 | /* this gets tricky, we have to make sure the journal list in | |
3806 | * the inode still exists. We know the list is still around | |
3807 | * if we've got a larger transaction id than the oldest list | |
3808 | */ | |
3809 | flush_commit_only: | |
3810 | if (journal_list_still_alive(inode->i_sb, id)) { | |
3811 | /* | |
3812 | * we only set ret to 1 when we know for sure | |
3813 | * the barrier hasn't been started yet on the commit | |
3814 | * block. | |
3815 | */ | |
3816 | if (atomic_read(&jl->j_commit_left) > 1) | |
3817 | ret = 1; | |
3818 | flush_commit_list(sb, jl, 1); | |
3819 | if (journal->j_errno) | |
3820 | ret = journal->j_errno; | |
3821 | } | |
1da177e4 | 3822 | } |
bd4c625c LT |
3823 | /* otherwise the list is gone, and long since committed */ |
3824 | return ret; | |
3825 | } | |
1da177e4 | 3826 | |
bd4c625c LT |
3827 | int reiserfs_commit_for_inode(struct inode *inode) |
3828 | { | |
600ed416 | 3829 | unsigned int id = REISERFS_I(inode)->i_trans_id; |
bd4c625c | 3830 | struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl; |
1da177e4 | 3831 | |
bd4c625c LT |
3832 | /* for the whole inode, assume unset id means it was |
3833 | * changed in the current transaction. More conservative | |
1da177e4 | 3834 | */ |
bd4c625c LT |
3835 | if (!id || !jl) { |
3836 | reiserfs_update_inode_transaction(inode); | |
3837 | id = REISERFS_I(inode)->i_trans_id; | |
3838 | /* jl will be updated in __commit_trans_jl */ | |
3839 | } | |
3840 | ||
3841 | return __commit_trans_jl(inode, id, jl); | |
3842 | } | |
3843 | ||
a9dd3643 | 3844 | void reiserfs_restore_prepared_buffer(struct super_block *sb, |
bd4c625c LT |
3845 | struct buffer_head *bh) |
3846 | { | |
a9dd3643 JM |
3847 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
3848 | PROC_INFO_INC(sb, journal.restore_prepared); | |
bd4c625c LT |
3849 | if (!bh) { |
3850 | return; | |
3851 | } | |
3852 | if (test_clear_buffer_journal_restore_dirty(bh) && | |
3853 | buffer_journal_dirty(bh)) { | |
3854 | struct reiserfs_journal_cnode *cn; | |
a9dd3643 | 3855 | cn = get_journal_hash_dev(sb, |
bd4c625c LT |
3856 | journal->j_list_hash_table, |
3857 | bh->b_blocknr); | |
3858 | if (cn && can_dirty(cn)) { | |
3859 | set_buffer_journal_test(bh); | |
3860 | mark_buffer_dirty(bh); | |
3861 | } | |
3862 | } | |
3863 | clear_buffer_journal_prepared(bh); | |
3864 | } | |
3865 | ||
3866 | extern struct tree_balance *cur_tb; | |
1da177e4 LT |
3867 | /* |
3868 | ** before we can change a metadata block, we have to make sure it won't | |
3869 | ** be written to disk while we are altering it. So, we must: | |
3870 | ** clean it | |
3871 | ** wait on it. | |
0222e657 | 3872 | ** |
1da177e4 | 3873 | */ |
a9dd3643 | 3874 | int reiserfs_prepare_for_journal(struct super_block *sb, |
bd4c625c LT |
3875 | struct buffer_head *bh, int wait) |
3876 | { | |
a9dd3643 | 3877 | PROC_INFO_INC(sb, journal.prepare); |
bd4c625c | 3878 | |
ca5de404 | 3879 | if (!trylock_buffer(bh)) { |
bd4c625c LT |
3880 | if (!wait) |
3881 | return 0; | |
3882 | lock_buffer(bh); | |
3883 | } | |
3884 | set_buffer_journal_prepared(bh); | |
3885 | if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) { | |
3886 | clear_buffer_journal_test(bh); | |
3887 | set_buffer_journal_restore_dirty(bh); | |
3888 | } | |
3889 | unlock_buffer(bh); | |
3890 | return 1; | |
3891 | } | |
3892 | ||
3893 | static void flush_old_journal_lists(struct super_block *s) | |
3894 | { | |
3895 | struct reiserfs_journal *journal = SB_JOURNAL(s); | |
3896 | struct reiserfs_journal_list *jl; | |
3897 | struct list_head *entry; | |
3898 | time_t now = get_seconds(); | |
3899 | ||
3900 | while (!list_empty(&journal->j_journal_list)) { | |
3901 | entry = journal->j_journal_list.next; | |
3902 | jl = JOURNAL_LIST_ENTRY(entry); | |
3903 | /* this check should always be run, to send old lists to disk */ | |
a3172027 CM |
3904 | if (jl->j_timestamp < (now - (JOURNAL_MAX_TRANS_AGE * 4)) && |
3905 | atomic_read(&jl->j_commit_left) == 0 && | |
3906 | test_transaction(s, jl)) { | |
bd4c625c LT |
3907 | flush_used_journal_lists(s, jl); |
3908 | } else { | |
3909 | break; | |
3910 | } | |
1da177e4 | 3911 | } |
1da177e4 LT |
3912 | } |
3913 | ||
0222e657 | 3914 | /* |
1da177e4 LT |
3915 | ** long and ugly. If flush, will not return until all commit |
3916 | ** blocks and all real buffers in the trans are on disk. | |
3917 | ** If no_async, won't return until all commit blocks are on disk. | |
3918 | ** | |
3919 | ** keep reading, there are comments as you go along | |
3920 | ** | |
3921 | ** If the journal is aborted, we just clean up. Things like flushing | |
3922 | ** journal lists, etc just won't happen. | |
3923 | */ | |
bd4c625c | 3924 | static int do_journal_end(struct reiserfs_transaction_handle *th, |
a9dd3643 | 3925 | struct super_block *sb, unsigned long nblocks, |
bd4c625c LT |
3926 | int flags) |
3927 | { | |
a9dd3643 | 3928 | struct reiserfs_journal *journal = SB_JOURNAL(sb); |
bd4c625c LT |
3929 | struct reiserfs_journal_cnode *cn, *next, *jl_cn; |
3930 | struct reiserfs_journal_cnode *last_cn = NULL; | |
3931 | struct reiserfs_journal_desc *desc; | |
3932 | struct reiserfs_journal_commit *commit; | |
3933 | struct buffer_head *c_bh; /* commit bh */ | |
3934 | struct buffer_head *d_bh; /* desc bh */ | |
3935 | int cur_write_start = 0; /* start index of current log write */ | |
3936 | int old_start; | |
3937 | int i; | |
a44c94a7 AZ |
3938 | int flush; |
3939 | int wait_on_commit; | |
bd4c625c LT |
3940 | struct reiserfs_journal_list *jl, *temp_jl; |
3941 | struct list_head *entry, *safe; | |
3942 | unsigned long jindex; | |
600ed416 | 3943 | unsigned int commit_trans_id; |
bd4c625c LT |
3944 | int trans_half; |
3945 | ||
3946 | BUG_ON(th->t_refcount > 1); | |
3947 | BUG_ON(!th->t_trans_id); | |
3948 | ||
a44c94a7 AZ |
3949 | /* protect flush_older_commits from doing mistakes if the |
3950 | transaction ID counter gets overflowed. */ | |
600ed416 | 3951 | if (th->t_trans_id == ~0U) |
a44c94a7 AZ |
3952 | flags |= FLUSH_ALL | COMMIT_NOW | WAIT; |
3953 | flush = flags & FLUSH_ALL; | |
3954 | wait_on_commit = flags & WAIT; | |
3955 | ||
bd4c625c | 3956 | current->journal_info = th->t_handle_save; |
a9dd3643 | 3957 | reiserfs_check_lock_depth(sb, "journal end"); |
bd4c625c | 3958 | if (journal->j_len == 0) { |
a9dd3643 | 3959 | reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb), |
bd4c625c | 3960 | 1); |
a9dd3643 | 3961 | journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb)); |
bd4c625c | 3962 | } |
1da177e4 | 3963 | |
a9dd3643 | 3964 | lock_journal(sb); |
bd4c625c LT |
3965 | if (journal->j_next_full_flush) { |
3966 | flags |= FLUSH_ALL; | |
3967 | flush = 1; | |
3968 | } | |
3969 | if (journal->j_next_async_flush) { | |
3970 | flags |= COMMIT_NOW | WAIT; | |
3971 | wait_on_commit = 1; | |
3972 | } | |
3973 | ||
0222e657 | 3974 | /* check_journal_end locks the journal, and unlocks if it does not return 1 |
bd4c625c LT |
3975 | ** it tells us if we should continue with the journal_end, or just return |
3976 | */ | |
a9dd3643 JM |
3977 | if (!check_journal_end(th, sb, nblocks, flags)) { |
3978 | sb->s_dirt = 1; | |
3979 | wake_queued_writers(sb); | |
3980 | reiserfs_async_progress_wait(sb); | |
bd4c625c LT |
3981 | goto out; |
3982 | } | |
3983 | ||
3984 | /* check_journal_end might set these, check again */ | |
3985 | if (journal->j_next_full_flush) { | |
3986 | flush = 1; | |
3987 | } | |
3988 | ||
3989 | /* | |
3990 | ** j must wait means we have to flush the log blocks, and the real blocks for | |
3991 | ** this transaction | |
3992 | */ | |
3993 | if (journal->j_must_wait > 0) { | |
3994 | flush = 1; | |
3995 | } | |
1da177e4 | 3996 | #ifdef REISERFS_PREALLOCATE |
ef43bc4f JK |
3997 | /* quota ops might need to nest, setup the journal_info pointer for them |
3998 | * and raise the refcount so that it is > 0. */ | |
bd4c625c | 3999 | current->journal_info = th; |
ef43bc4f | 4000 | th->t_refcount++; |
bd4c625c LT |
4001 | reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into |
4002 | * the transaction */ | |
ef43bc4f | 4003 | th->t_refcount--; |
bd4c625c | 4004 | current->journal_info = th->t_handle_save; |
1da177e4 | 4005 | #endif |
bd4c625c LT |
4006 | |
4007 | /* setup description block */ | |
4008 | d_bh = | |
a9dd3643 JM |
4009 | journal_getblk(sb, |
4010 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4011 | journal->j_start); |
4012 | set_buffer_uptodate(d_bh); | |
4013 | desc = (struct reiserfs_journal_desc *)(d_bh)->b_data; | |
4014 | memset(d_bh->b_data, 0, d_bh->b_size); | |
4015 | memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8); | |
4016 | set_desc_trans_id(desc, journal->j_trans_id); | |
4017 | ||
4018 | /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */ | |
a9dd3643 | 4019 | c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) + |
bd4c625c | 4020 | ((journal->j_start + journal->j_len + |
a9dd3643 | 4021 | 1) % SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4022 | commit = (struct reiserfs_journal_commit *)c_bh->b_data; |
4023 | memset(c_bh->b_data, 0, c_bh->b_size); | |
4024 | set_commit_trans_id(commit, journal->j_trans_id); | |
4025 | set_buffer_uptodate(c_bh); | |
4026 | ||
4027 | /* init this journal list */ | |
4028 | jl = journal->j_current_jl; | |
4029 | ||
4030 | /* we lock the commit before doing anything because | |
4031 | * we want to make sure nobody tries to run flush_commit_list until | |
4032 | * the new transaction is fully setup, and we've already flushed the | |
4033 | * ordered bh list | |
4034 | */ | |
8ebc4232 | 4035 | reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb); |
bd4c625c LT |
4036 | |
4037 | /* save the transaction id in case we need to commit it later */ | |
4038 | commit_trans_id = jl->j_trans_id; | |
4039 | ||
4040 | atomic_set(&jl->j_older_commits_done, 0); | |
4041 | jl->j_trans_id = journal->j_trans_id; | |
4042 | jl->j_timestamp = journal->j_trans_start_time; | |
4043 | jl->j_commit_bh = c_bh; | |
4044 | jl->j_start = journal->j_start; | |
4045 | jl->j_len = journal->j_len; | |
4046 | atomic_set(&jl->j_nonzerolen, journal->j_len); | |
4047 | atomic_set(&jl->j_commit_left, journal->j_len + 2); | |
4048 | jl->j_realblock = NULL; | |
4049 | ||
4050 | /* The ENTIRE FOR LOOP MUST not cause schedule to occur. | |
4051 | ** for each real block, add it to the journal list hash, | |
4052 | ** copy into real block index array in the commit or desc block | |
4053 | */ | |
a9dd3643 | 4054 | trans_half = journal_trans_half(sb->s_blocksize); |
bd4c625c LT |
4055 | for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) { |
4056 | if (buffer_journaled(cn->bh)) { | |
a9dd3643 | 4057 | jl_cn = get_cnode(sb); |
bd4c625c | 4058 | if (!jl_cn) { |
a9dd3643 | 4059 | reiserfs_panic(sb, "journal-1676", |
c3a9c210 | 4060 | "get_cnode returned NULL"); |
bd4c625c LT |
4061 | } |
4062 | if (i == 0) { | |
4063 | jl->j_realblock = jl_cn; | |
4064 | } | |
4065 | jl_cn->prev = last_cn; | |
4066 | jl_cn->next = NULL; | |
4067 | if (last_cn) { | |
4068 | last_cn->next = jl_cn; | |
4069 | } | |
4070 | last_cn = jl_cn; | |
0222e657 | 4071 | /* make sure the block we are trying to log is not a block |
bd4c625c LT |
4072 | of journal or reserved area */ |
4073 | ||
4074 | if (is_block_in_log_or_reserved_area | |
a9dd3643 JM |
4075 | (sb, cn->bh->b_blocknr)) { |
4076 | reiserfs_panic(sb, "journal-2332", | |
c3a9c210 JM |
4077 | "Trying to log block %lu, " |
4078 | "which is a log block", | |
bd4c625c LT |
4079 | cn->bh->b_blocknr); |
4080 | } | |
4081 | jl_cn->blocknr = cn->bh->b_blocknr; | |
4082 | jl_cn->state = 0; | |
a9dd3643 | 4083 | jl_cn->sb = sb; |
bd4c625c LT |
4084 | jl_cn->bh = cn->bh; |
4085 | jl_cn->jlist = jl; | |
4086 | insert_journal_hash(journal->j_list_hash_table, jl_cn); | |
4087 | if (i < trans_half) { | |
4088 | desc->j_realblock[i] = | |
4089 | cpu_to_le32(cn->bh->b_blocknr); | |
4090 | } else { | |
4091 | commit->j_realblock[i - trans_half] = | |
4092 | cpu_to_le32(cn->bh->b_blocknr); | |
4093 | } | |
4094 | } else { | |
4095 | i--; | |
4096 | } | |
4097 | } | |
4098 | set_desc_trans_len(desc, journal->j_len); | |
4099 | set_desc_mount_id(desc, journal->j_mount_id); | |
4100 | set_desc_trans_id(desc, journal->j_trans_id); | |
4101 | set_commit_trans_len(commit, journal->j_len); | |
4102 | ||
4103 | /* special check in case all buffers in the journal were marked for not logging */ | |
14a61442 | 4104 | BUG_ON(journal->j_len == 0); |
bd4c625c LT |
4105 | |
4106 | /* we're about to dirty all the log blocks, mark the description block | |
4107 | * dirty now too. Don't mark the commit block dirty until all the | |
4108 | * others are on disk | |
4109 | */ | |
4110 | mark_buffer_dirty(d_bh); | |
4111 | ||
4112 | /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */ | |
4113 | cur_write_start = journal->j_start; | |
4114 | cn = journal->j_first; | |
4115 | jindex = 1; /* start at one so we don't get the desc again */ | |
4116 | while (cn) { | |
4117 | clear_buffer_journal_new(cn->bh); | |
4118 | /* copy all the real blocks into log area. dirty log blocks */ | |
4119 | if (buffer_journaled(cn->bh)) { | |
4120 | struct buffer_head *tmp_bh; | |
4121 | char *addr; | |
4122 | struct page *page; | |
4123 | tmp_bh = | |
a9dd3643 JM |
4124 | journal_getblk(sb, |
4125 | SB_ONDISK_JOURNAL_1st_BLOCK(sb) + | |
bd4c625c LT |
4126 | ((cur_write_start + |
4127 | jindex) % | |
a9dd3643 | 4128 | SB_ONDISK_JOURNAL_SIZE(sb))); |
bd4c625c LT |
4129 | set_buffer_uptodate(tmp_bh); |
4130 | page = cn->bh->b_page; | |
4131 | addr = kmap(page); | |
4132 | memcpy(tmp_bh->b_data, | |
4133 | addr + offset_in_page(cn->bh->b_data), | |
4134 | cn->bh->b_size); | |
4135 | kunmap(page); | |
4136 | mark_buffer_dirty(tmp_bh); | |
4137 | jindex++; | |
4138 | set_buffer_journal_dirty(cn->bh); | |
4139 | clear_buffer_journaled(cn->bh); | |
4140 | } else { | |
4141 | /* JDirty cleared sometime during transaction. don't log this one */ | |
a9dd3643 | 4142 | reiserfs_warning(sb, "journal-2048", |
45b03d5e JM |
4143 | "BAD, buffer in journal hash, " |
4144 | "but not JDirty!"); | |
bd4c625c LT |
4145 | brelse(cn->bh); |
4146 | } | |
4147 | next = cn->next; | |
a9dd3643 | 4148 | free_cnode(sb, cn); |
bd4c625c | 4149 | cn = next; |
e6950a4d | 4150 | reiserfs_write_unlock(sb); |
bd4c625c | 4151 | cond_resched(); |
e6950a4d | 4152 | reiserfs_write_lock(sb); |
bd4c625c LT |
4153 | } |
4154 | ||
4155 | /* we are done with both the c_bh and d_bh, but | |
4156 | ** c_bh must be written after all other commit blocks, | |
4157 | ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1. | |
4158 | */ | |
4159 | ||
a9dd3643 | 4160 | journal->j_current_jl = alloc_journal_list(sb); |
bd4c625c LT |
4161 | |
4162 | /* now it is safe to insert this transaction on the main list */ | |
4163 | list_add_tail(&jl->j_list, &journal->j_journal_list); | |
4164 | list_add_tail(&jl->j_working_list, &journal->j_working_list); | |
4165 | journal->j_num_work_lists++; | |
4166 | ||
4167 | /* reset journal values for the next transaction */ | |
4168 | old_start = journal->j_start; | |
4169 | journal->j_start = | |
4170 | (journal->j_start + journal->j_len + | |
a9dd3643 | 4171 | 2) % SB_ONDISK_JOURNAL_SIZE(sb); |
bd4c625c LT |
4172 | atomic_set(&(journal->j_wcount), 0); |
4173 | journal->j_bcount = 0; | |
4174 | journal->j_last = NULL; | |
4175 | journal->j_first = NULL; | |
4176 | journal->j_len = 0; | |
4177 | journal->j_trans_start_time = 0; | |
a44c94a7 AZ |
4178 | /* check for trans_id overflow */ |
4179 | if (++journal->j_trans_id == 0) | |
4180 | journal->j_trans_id = 10; | |
bd4c625c LT |
4181 | journal->j_current_jl->j_trans_id = journal->j_trans_id; |
4182 | journal->j_must_wait = 0; | |
4183 | journal->j_len_alloc = 0; | |
4184 | journal->j_next_full_flush = 0; | |
4185 | journal->j_next_async_flush = 0; | |
a9dd3643 | 4186 | init_journal_hash(sb); |
bd4c625c LT |
4187 | |
4188 | // make sure reiserfs_add_jh sees the new current_jl before we | |
4189 | // write out the tails | |
4190 | smp_mb(); | |
4191 | ||
4192 | /* tail conversion targets have to hit the disk before we end the | |
4193 | * transaction. Otherwise a later transaction might repack the tail | |
4194 | * before this transaction commits, leaving the data block unflushed and | |
4195 | * clean, if we crash before the later transaction commits, the data block | |
4196 | * is lost. | |
4197 | */ | |
4198 | if (!list_empty(&jl->j_tail_bh_list)) { | |
8ebc4232 | 4199 | reiserfs_write_unlock(sb); |
bd4c625c LT |
4200 | write_ordered_buffers(&journal->j_dirty_buffers_lock, |
4201 | journal, jl, &jl->j_tail_bh_list); | |
8ebc4232 | 4202 | reiserfs_write_lock(sb); |
bd4c625c | 4203 | } |
14a61442 | 4204 | BUG_ON(!list_empty(&jl->j_tail_bh_list)); |
90415dea | 4205 | mutex_unlock(&jl->j_commit_mutex); |
bd4c625c LT |
4206 | |
4207 | /* honor the flush wishes from the caller, simple commits can | |
4208 | ** be done outside the journal lock, they are done below | |
4209 | ** | |
4210 | ** if we don't flush the commit list right now, we put it into | |
4211 | ** the work queue so the people waiting on the async progress work | |
4212 | ** queue don't wait for this proc to flush journal lists and such. | |
4213 | */ | |
4214 | if (flush) { | |
a9dd3643 JM |
4215 | flush_commit_list(sb, jl, 1); |
4216 | flush_journal_list(sb, jl, 1); | |
bd4c625c LT |
4217 | } else if (!(jl->j_state & LIST_COMMIT_PENDING)) |
4218 | queue_delayed_work(commit_wq, &journal->j_work, HZ / 10); | |
4219 | ||
0222e657 JM |
4220 | /* if the next transaction has any chance of wrapping, flush |
4221 | ** transactions that might get overwritten. If any journal lists are very | |
4222 | ** old flush them as well. | |
bd4c625c LT |
4223 | */ |
4224 | first_jl: | |
4225 | list_for_each_safe(entry, safe, &journal->j_journal_list) { | |
4226 | temp_jl = JOURNAL_LIST_ENTRY(entry); | |
4227 | if (journal->j_start <= temp_jl->j_start) { | |
4228 | if ((journal->j_start + journal->j_trans_max + 1) >= | |
4229 | temp_jl->j_start) { | |
a9dd3643 | 4230 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4231 | goto first_jl; |
4232 | } else if ((journal->j_start + | |
4233 | journal->j_trans_max + 1) < | |
a9dd3643 | 4234 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c LT |
4235 | /* if we don't cross into the next transaction and we don't |
4236 | * wrap, there is no way we can overlap any later transactions | |
4237 | * break now | |
4238 | */ | |
4239 | break; | |
4240 | } | |
4241 | } else if ((journal->j_start + | |
4242 | journal->j_trans_max + 1) > | |
a9dd3643 | 4243 | SB_ONDISK_JOURNAL_SIZE(sb)) { |
bd4c625c | 4244 | if (((journal->j_start + journal->j_trans_max + 1) % |
a9dd3643 | 4245 | SB_ONDISK_JOURNAL_SIZE(sb)) >= |
bd4c625c | 4246 | temp_jl->j_start) { |
a9dd3643 | 4247 | flush_used_journal_lists(sb, temp_jl); |
bd4c625c LT |
4248 | goto first_jl; |
4249 | } else { | |
4250 | /* we don't overlap anything from out start to the end of the | |
4251 | * log, and our wrapped portion doesn't overlap anything at | |
4252 | * the start of the log. We can break | |
4253 | */ | |
4254 | break; | |
4255 | } | |
4256 | } | |
4257 | } | |
a9dd3643 | 4258 | flush_old_journal_lists(sb); |
bd4c625c LT |
4259 | |
4260 | journal->j_current_jl->j_list_bitmap = | |
a9dd3643 | 4261 | get_list_bitmap(sb, journal->j_current_jl); |
bd4c625c LT |
4262 | |
4263 | if (!(journal->j_current_jl->j_list_bitmap)) { | |
a9dd3643 | 4264 | reiserfs_panic(sb, "journal-1996", |
c3a9c210 | 4265 | "could not get a list bitmap"); |
bd4c625c LT |
4266 | } |
4267 | ||
4268 | atomic_set(&(journal->j_jlock), 0); | |
a9dd3643 | 4269 | unlock_journal(sb); |
bd4c625c LT |
4270 | /* wake up any body waiting to join. */ |
4271 | clear_bit(J_WRITERS_QUEUED, &journal->j_state); | |
4272 | wake_up(&(journal->j_join_wait)); | |
4273 | ||
4274 | if (!flush && wait_on_commit && | |
a9dd3643 JM |
4275 | journal_list_still_alive(sb, commit_trans_id)) { |
4276 | flush_commit_list(sb, jl, 1); | |
bd4c625c LT |
4277 | } |
4278 | out: | |
a9dd3643 | 4279 | reiserfs_check_lock_depth(sb, "journal end2"); |
bd4c625c LT |
4280 | |
4281 | memset(th, 0, sizeof(*th)); | |
4282 | /* Re-set th->t_super, so we can properly keep track of how many | |
4283 | * persistent transactions there are. We need to do this so if this | |
4284 | * call is part of a failed restart_transaction, we can free it later */ | |
a9dd3643 | 4285 | th->t_super = sb; |
bd4c625c LT |
4286 | |
4287 | return journal->j_errno; | |
4288 | } | |
4289 | ||
32e8b106 JM |
4290 | /* Send the file system read only and refuse new transactions */ |
4291 | void reiserfs_abort_journal(struct super_block *sb, int errno) | |
bd4c625c LT |
4292 | { |
4293 | struct reiserfs_journal *journal = SB_JOURNAL(sb); | |
4294 | if (test_bit(J_ABORTED, &journal->j_state)) | |
4295 | return; | |
4296 | ||
32e8b106 JM |
4297 | if (!journal->j_errno) |
4298 | journal->j_errno = errno; | |
bd4c625c LT |
4299 | |
4300 | sb->s_flags |= MS_RDONLY; | |
4301 | set_bit(J_ABORTED, &journal->j_state); | |
1da177e4 LT |
4302 | |
4303 | #ifdef CONFIG_REISERFS_CHECK | |
bd4c625c | 4304 | dump_stack(); |
1da177e4 LT |
4305 | #endif |
4306 | } |