2 * Write ahead logging implementation copyright Chris Mason 2000
4 * The background commits make this code very interrelated, and
5 * overly complex. I need to rethink things a bit....The major players:
7 * journal_begin -- call with the number of blocks you expect to log.
8 * If the current transaction is too
9 * old, it will block until the current transaction is
10 * finished, and then start a new one.
11 * Usually, your transaction will get joined in with
12 * previous ones for speed.
14 * journal_join -- same as journal_begin, but won't block on the current
15 * transaction regardless of age. Don't ever call
16 * this. Ever. There are only two places it should be
17 * called from, and they are both inside this file.
19 * journal_mark_dirty -- adds blocks into this transaction. clears any flags
20 * that might make them get sent to disk
21 * and then marks them BH_JDirty. Puts the buffer head
22 * into the current transaction hash.
24 * journal_end -- if the current transaction is batchable, it does nothing
25 * otherwise, it could do an async/synchronous commit, or
26 * a full flush of all log and real blocks in the
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
33 * -- Note, if you call this as an immediate flush from
34 * from within kupdate, it will ignore the immediate flag
37 #include <linux/time.h>
38 #include <linux/semaphore.h>
39 #include <linux/vmalloc.h>
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>
46 #include <linux/buffer_head.h>
47 #include <linux/workqueue.h>
48 #include <linux/writeback.h>
49 #include <linux/blkdev.h>
50 #include <linux/backing-dev.h>
51 #include <linux/uaccess.h>
52 #include <linux/slab.h>
55 /* gets a struct reiserfs_journal_list * from a list head */
56 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
58 #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
61 /* must be correct to keep the desc and commit structs at 4k */
62 #define JOURNAL_TRANS_HALF 1018
63 #define BUFNR 64 /*read ahead */
65 /* cnode stat bits. Move these into reiserfs_fs.h */
67 /* this block was freed, and can't be written. */
69 /* this block was freed during this transaction, and can't be written */
70 #define BLOCK_FREED_HOLDER 3
72 /* used in flush_journal_list */
73 #define BLOCK_NEEDS_FLUSH 4
74 #define BLOCK_DIRTIED 5
76 /* journal list state bits */
77 #define LIST_TOUCHED 1
79 #define LIST_COMMIT_PENDING 4 /* someone will commit this list */
81 /* flags for do_journal_end */
82 #define FLUSH_ALL 1 /* flush commit and real blocks */
83 #define COMMIT_NOW 2 /* end and commit this transaction */
84 #define WAIT 4 /* wait for the log blocks to hit the disk */
86 static int do_journal_end(struct reiserfs_transaction_handle
*, int flags
);
87 static int flush_journal_list(struct super_block
*s
,
88 struct reiserfs_journal_list
*jl
, int flushall
);
89 static int flush_commit_list(struct super_block
*s
,
90 struct reiserfs_journal_list
*jl
, int flushall
);
91 static int can_dirty(struct reiserfs_journal_cnode
*cn
);
92 static int journal_join(struct reiserfs_transaction_handle
*th
,
93 struct super_block
*sb
);
94 static void release_journal_dev(struct super_block
*super
,
95 struct reiserfs_journal
*journal
);
96 static int dirty_one_transaction(struct super_block
*s
,
97 struct reiserfs_journal_list
*jl
);
98 static void flush_async_commits(struct work_struct
*work
);
99 static void queue_log_writer(struct super_block
*s
);
101 /* values for join in do_journal_begin_r */
103 JBEGIN_REG
= 0, /* regular journal begin */
104 /* join the running transaction if at all possible */
106 /* called from cleanup code, ignores aborted flag */
110 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
111 struct super_block
*sb
,
112 unsigned long nblocks
, int join
);
114 static void init_journal_hash(struct super_block
*sb
)
116 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
117 memset(journal
->j_hash_table
, 0,
118 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
122 * clears BH_Dirty and sticks the buffer on the clean list. Called because
123 * I can't allow refile_buffer to make schedule happen after I've freed a
124 * block. Look at remove_from_transaction and journal_mark_freed for
127 static int reiserfs_clean_and_file_buffer(struct buffer_head
*bh
)
130 clear_buffer_dirty(bh
);
131 clear_buffer_journal_test(bh
);
136 static struct reiserfs_bitmap_node
*allocate_bitmap_node(struct super_block
139 struct reiserfs_bitmap_node
*bn
;
142 bn
= kmalloc(sizeof(struct reiserfs_bitmap_node
), GFP_NOFS
);
146 bn
->data
= kzalloc(sb
->s_blocksize
, GFP_NOFS
);
152 INIT_LIST_HEAD(&bn
->list
);
156 static struct reiserfs_bitmap_node
*get_bitmap_node(struct super_block
*sb
)
158 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
159 struct reiserfs_bitmap_node
*bn
= NULL
;
160 struct list_head
*entry
= journal
->j_bitmap_nodes
.next
;
162 journal
->j_used_bitmap_nodes
++;
165 if (entry
!= &journal
->j_bitmap_nodes
) {
166 bn
= list_entry(entry
, struct reiserfs_bitmap_node
, list
);
168 memset(bn
->data
, 0, sb
->s_blocksize
);
169 journal
->j_free_bitmap_nodes
--;
172 bn
= allocate_bitmap_node(sb
);
179 static inline void free_bitmap_node(struct super_block
*sb
,
180 struct reiserfs_bitmap_node
*bn
)
182 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
183 journal
->j_used_bitmap_nodes
--;
184 if (journal
->j_free_bitmap_nodes
> REISERFS_MAX_BITMAP_NODES
) {
188 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
189 journal
->j_free_bitmap_nodes
++;
193 static void allocate_bitmap_nodes(struct super_block
*sb
)
196 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
197 struct reiserfs_bitmap_node
*bn
= NULL
;
198 for (i
= 0; i
< REISERFS_MIN_BITMAP_NODES
; i
++) {
199 bn
= allocate_bitmap_node(sb
);
201 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
202 journal
->j_free_bitmap_nodes
++;
204 /* this is ok, we'll try again when more are needed */
210 static int set_bit_in_list_bitmap(struct super_block
*sb
,
212 struct reiserfs_list_bitmap
*jb
)
214 unsigned int bmap_nr
= block
/ (sb
->s_blocksize
<< 3);
215 unsigned int bit_nr
= block
% (sb
->s_blocksize
<< 3);
217 if (!jb
->bitmaps
[bmap_nr
]) {
218 jb
->bitmaps
[bmap_nr
] = get_bitmap_node(sb
);
220 set_bit(bit_nr
, (unsigned long *)jb
->bitmaps
[bmap_nr
]->data
);
224 static void cleanup_bitmap_list(struct super_block
*sb
,
225 struct reiserfs_list_bitmap
*jb
)
228 if (jb
->bitmaps
== NULL
)
231 for (i
= 0; i
< reiserfs_bmap_count(sb
); i
++) {
232 if (jb
->bitmaps
[i
]) {
233 free_bitmap_node(sb
, jb
->bitmaps
[i
]);
234 jb
->bitmaps
[i
] = NULL
;
240 * only call this on FS unmount.
242 static int free_list_bitmaps(struct super_block
*sb
,
243 struct reiserfs_list_bitmap
*jb_array
)
246 struct reiserfs_list_bitmap
*jb
;
247 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
249 jb
->journal_list
= NULL
;
250 cleanup_bitmap_list(sb
, jb
);
257 static int free_bitmap_nodes(struct super_block
*sb
)
259 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
260 struct list_head
*next
= journal
->j_bitmap_nodes
.next
;
261 struct reiserfs_bitmap_node
*bn
;
263 while (next
!= &journal
->j_bitmap_nodes
) {
264 bn
= list_entry(next
, struct reiserfs_bitmap_node
, list
);
268 next
= journal
->j_bitmap_nodes
.next
;
269 journal
->j_free_bitmap_nodes
--;
276 * get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
277 * jb_array is the array to be filled in.
279 int reiserfs_allocate_list_bitmaps(struct super_block
*sb
,
280 struct reiserfs_list_bitmap
*jb_array
,
281 unsigned int bmap_nr
)
285 struct reiserfs_list_bitmap
*jb
;
286 int mem
= bmap_nr
* sizeof(struct reiserfs_bitmap_node
*);
288 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
290 jb
->journal_list
= NULL
;
291 jb
->bitmaps
= vzalloc(mem
);
293 reiserfs_warning(sb
, "clm-2000", "unable to "
294 "allocate bitmaps for journal lists");
300 free_list_bitmaps(sb
, jb_array
);
307 * find an available list bitmap. If you can't find one, flush a commit list
310 static struct reiserfs_list_bitmap
*get_list_bitmap(struct super_block
*sb
,
311 struct reiserfs_journal_list
315 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
316 struct reiserfs_list_bitmap
*jb
= NULL
;
318 for (j
= 0; j
< (JOURNAL_NUM_BITMAPS
* 3); j
++) {
319 i
= journal
->j_list_bitmap_index
;
320 journal
->j_list_bitmap_index
= (i
+ 1) % JOURNAL_NUM_BITMAPS
;
321 jb
= journal
->j_list_bitmap
+ i
;
322 if (journal
->j_list_bitmap
[i
].journal_list
) {
323 flush_commit_list(sb
,
324 journal
->j_list_bitmap
[i
].
326 if (!journal
->j_list_bitmap
[i
].journal_list
) {
333 /* double check to make sure if flushed correctly */
334 if (jb
->journal_list
)
336 jb
->journal_list
= jl
;
341 * allocates a new chunk of X nodes, and links them all together as a list.
342 * Uses the cnode->next and cnode->prev pointers
343 * returns NULL on failure
345 static struct reiserfs_journal_cnode
*allocate_cnodes(int num_cnodes
)
347 struct reiserfs_journal_cnode
*head
;
349 if (num_cnodes
<= 0) {
352 head
= vzalloc(num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
357 head
[0].next
= head
+ 1;
358 for (i
= 1; i
< num_cnodes
; i
++) {
359 head
[i
].prev
= head
+ (i
- 1);
360 head
[i
].next
= head
+ (i
+ 1); /* if last one, overwrite it after the if */
362 head
[num_cnodes
- 1].next
= NULL
;
366 /* pulls a cnode off the free list, or returns NULL on failure */
367 static struct reiserfs_journal_cnode
*get_cnode(struct super_block
*sb
)
369 struct reiserfs_journal_cnode
*cn
;
370 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
372 reiserfs_check_lock_depth(sb
, "get_cnode");
374 if (journal
->j_cnode_free
<= 0) {
377 journal
->j_cnode_used
++;
378 journal
->j_cnode_free
--;
379 cn
= journal
->j_cnode_free_list
;
384 cn
->next
->prev
= NULL
;
386 journal
->j_cnode_free_list
= cn
->next
;
387 memset(cn
, 0, sizeof(struct reiserfs_journal_cnode
));
392 * returns a cnode to the free list
394 static void free_cnode(struct super_block
*sb
,
395 struct reiserfs_journal_cnode
*cn
)
397 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
399 reiserfs_check_lock_depth(sb
, "free_cnode");
401 journal
->j_cnode_used
--;
402 journal
->j_cnode_free
++;
403 /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
404 cn
->next
= journal
->j_cnode_free_list
;
405 if (journal
->j_cnode_free_list
) {
406 journal
->j_cnode_free_list
->prev
= cn
;
408 cn
->prev
= NULL
; /* not needed with the memset, but I might kill the memset, and forget to do this */
409 journal
->j_cnode_free_list
= cn
;
412 static void clear_prepared_bits(struct buffer_head
*bh
)
414 clear_buffer_journal_prepared(bh
);
415 clear_buffer_journal_restore_dirty(bh
);
419 * return a cnode with same dev, block number and size in table,
420 * or null if not found
422 static inline struct reiserfs_journal_cnode
*get_journal_hash_dev(struct
426 reiserfs_journal_cnode
430 struct reiserfs_journal_cnode
*cn
;
431 cn
= journal_hash(table
, sb
, bl
);
433 if (cn
->blocknr
== bl
&& cn
->sb
== sb
)
437 return (struct reiserfs_journal_cnode
*)0;
441 * this actually means 'can this block be reallocated yet?'. If you set
442 * search_all, a block can only be allocated if it is not in the current
443 * transaction, was not freed by the current transaction, and has no chance
444 * of ever being overwritten by a replay after crashing.
446 * If you don't set search_all, a block can only be allocated if it is not
447 * in the current transaction. Since deleting a block removes it from the
448 * current transaction, this case should never happen. If you don't set
449 * search_all, make sure you never write the block without logging it.
451 * next_zero_bit is a suggestion about the next block to try for find_forward.
452 * when bl is rejected because it is set in a journal list bitmap, we search
453 * for the next zero bit in the bitmap that rejected bl. Then, we return
454 * that through next_zero_bit for find_forward to try.
456 * Just because we return something in next_zero_bit does not mean we won't
457 * reject it on the next call to reiserfs_in_journal
459 int reiserfs_in_journal(struct super_block
*sb
,
460 unsigned int bmap_nr
, int bit_nr
, int search_all
,
461 b_blocknr_t
* next_zero_bit
)
463 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
464 struct reiserfs_journal_cnode
*cn
;
465 struct reiserfs_list_bitmap
*jb
;
469 *next_zero_bit
= 0; /* always start this at zero. */
471 PROC_INFO_INC(sb
, journal
.in_journal
);
473 * If we aren't doing a search_all, this is a metablock, and it
474 * will be logged before use. if we crash before the transaction
475 * that freed it commits, this transaction won't have committed
476 * either, and the block will never be written
479 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
480 PROC_INFO_INC(sb
, journal
.in_journal_bitmap
);
481 jb
= journal
->j_list_bitmap
+ i
;
482 if (jb
->journal_list
&& jb
->bitmaps
[bmap_nr
] &&
484 (unsigned long *)jb
->bitmaps
[bmap_nr
]->
487 find_next_zero_bit((unsigned long *)
488 (jb
->bitmaps
[bmap_nr
]->
490 sb
->s_blocksize
<< 3,
497 bl
= bmap_nr
* (sb
->s_blocksize
<< 3) + bit_nr
;
498 /* is it in any old transactions? */
501 get_journal_hash_dev(sb
, journal
->j_list_hash_table
, bl
))) {
505 /* is it in the current transaction. This should never happen */
506 if ((cn
= get_journal_hash_dev(sb
, journal
->j_hash_table
, bl
))) {
511 PROC_INFO_INC(sb
, journal
.in_journal_reusable
);
516 /* insert cn into table */
517 static inline void insert_journal_hash(struct reiserfs_journal_cnode
**table
,
518 struct reiserfs_journal_cnode
*cn
)
520 struct reiserfs_journal_cnode
*cn_orig
;
522 cn_orig
= journal_hash(table
, cn
->sb
, cn
->blocknr
);
528 journal_hash(table
, cn
->sb
, cn
->blocknr
) = cn
;
531 /* lock the current transaction */
532 static inline void lock_journal(struct super_block
*sb
)
534 PROC_INFO_INC(sb
, journal
.lock_journal
);
536 reiserfs_mutex_lock_safe(&SB_JOURNAL(sb
)->j_mutex
, sb
);
539 /* unlock the current transaction */
540 static inline void unlock_journal(struct super_block
*sb
)
542 mutex_unlock(&SB_JOURNAL(sb
)->j_mutex
);
545 static inline void get_journal_list(struct reiserfs_journal_list
*jl
)
550 static inline void put_journal_list(struct super_block
*s
,
551 struct reiserfs_journal_list
*jl
)
553 if (jl
->j_refcount
< 1) {
554 reiserfs_panic(s
, "journal-2", "trans id %u, refcount at %d",
555 jl
->j_trans_id
, jl
->j_refcount
);
557 if (--jl
->j_refcount
== 0)
562 * this used to be much more involved, and I'm keeping it just in case
563 * things get ugly again. it gets called by flush_commit_list, and
564 * cleans up any data stored about blocks freed during a transaction.
566 static void cleanup_freed_for_journal_list(struct super_block
*sb
,
567 struct reiserfs_journal_list
*jl
)
570 struct reiserfs_list_bitmap
*jb
= jl
->j_list_bitmap
;
572 cleanup_bitmap_list(sb
, jb
);
574 jl
->j_list_bitmap
->journal_list
= NULL
;
575 jl
->j_list_bitmap
= NULL
;
578 static int journal_list_still_alive(struct super_block
*s
,
579 unsigned int trans_id
)
581 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
582 struct list_head
*entry
= &journal
->j_journal_list
;
583 struct reiserfs_journal_list
*jl
;
585 if (!list_empty(entry
)) {
586 jl
= JOURNAL_LIST_ENTRY(entry
->next
);
587 if (jl
->j_trans_id
<= trans_id
) {
595 * If page->mapping was null, we failed to truncate this page for
596 * some reason. Most likely because it was truncated after being
597 * logged via data=journal.
599 * This does a check to see if the buffer belongs to one of these
600 * lost pages before doing the final put_bh. If page->mapping was
601 * null, it tries to free buffers on the page, which should make the
602 * final page_cache_release drop the page from the lru.
604 static void release_buffer_page(struct buffer_head
*bh
)
606 struct page
*page
= bh
->b_page
;
607 if (!page
->mapping
&& trylock_page(page
)) {
608 page_cache_get(page
);
611 try_to_free_buffers(page
);
613 page_cache_release(page
);
619 static void reiserfs_end_buffer_io_sync(struct buffer_head
*bh
, int uptodate
)
621 char b
[BDEVNAME_SIZE
];
623 if (buffer_journaled(bh
)) {
624 reiserfs_warning(NULL
, "clm-2084",
625 "pinned buffer %lu:%s sent to disk",
626 bh
->b_blocknr
, bdevname(bh
->b_bdev
, b
));
629 set_buffer_uptodate(bh
);
631 clear_buffer_uptodate(bh
);
634 release_buffer_page(bh
);
637 static void reiserfs_end_ordered_io(struct buffer_head
*bh
, int uptodate
)
640 set_buffer_uptodate(bh
);
642 clear_buffer_uptodate(bh
);
647 static void submit_logged_buffer(struct buffer_head
*bh
)
650 bh
->b_end_io
= reiserfs_end_buffer_io_sync
;
651 clear_buffer_journal_new(bh
);
652 clear_buffer_dirty(bh
);
653 if (!test_clear_buffer_journal_test(bh
))
655 if (!buffer_uptodate(bh
))
657 submit_bh(WRITE
, bh
);
660 static void submit_ordered_buffer(struct buffer_head
*bh
)
663 bh
->b_end_io
= reiserfs_end_ordered_io
;
664 clear_buffer_dirty(bh
);
665 if (!buffer_uptodate(bh
))
667 submit_bh(WRITE
, bh
);
670 #define CHUNK_SIZE 32
671 struct buffer_chunk
{
672 struct buffer_head
*bh
[CHUNK_SIZE
];
676 static void write_chunk(struct buffer_chunk
*chunk
)
679 for (i
= 0; i
< chunk
->nr
; i
++) {
680 submit_logged_buffer(chunk
->bh
[i
]);
685 static void write_ordered_chunk(struct buffer_chunk
*chunk
)
688 for (i
= 0; i
< chunk
->nr
; i
++) {
689 submit_ordered_buffer(chunk
->bh
[i
]);
694 static int add_to_chunk(struct buffer_chunk
*chunk
, struct buffer_head
*bh
,
695 spinlock_t
* lock
, void (fn
) (struct buffer_chunk
*))
698 BUG_ON(chunk
->nr
>= CHUNK_SIZE
);
699 chunk
->bh
[chunk
->nr
++] = bh
;
700 if (chunk
->nr
>= CHUNK_SIZE
) {
711 static atomic_t nr_reiserfs_jh
= ATOMIC_INIT(0);
712 static struct reiserfs_jh
*alloc_jh(void)
714 struct reiserfs_jh
*jh
;
716 jh
= kmalloc(sizeof(*jh
), GFP_NOFS
);
718 atomic_inc(&nr_reiserfs_jh
);
726 * we want to free the jh when the buffer has been written
729 void reiserfs_free_jh(struct buffer_head
*bh
)
731 struct reiserfs_jh
*jh
;
735 bh
->b_private
= NULL
;
737 list_del_init(&jh
->list
);
739 if (atomic_read(&nr_reiserfs_jh
) <= 0)
741 atomic_dec(&nr_reiserfs_jh
);
746 static inline int __add_jh(struct reiserfs_journal
*j
, struct buffer_head
*bh
,
749 struct reiserfs_jh
*jh
;
752 spin_lock(&j
->j_dirty_buffers_lock
);
753 if (!bh
->b_private
) {
754 spin_unlock(&j
->j_dirty_buffers_lock
);
758 list_del_init(&jh
->list
);
763 spin_lock(&j
->j_dirty_buffers_lock
);
765 * buffer must be locked for __add_jh, should be able to have
766 * two adds at the same time
768 BUG_ON(bh
->b_private
);
772 jh
->jl
= j
->j_current_jl
;
774 list_add_tail(&jh
->list
, &jh
->jl
->j_tail_bh_list
);
776 list_add_tail(&jh
->list
, &jh
->jl
->j_bh_list
);
778 spin_unlock(&j
->j_dirty_buffers_lock
);
782 int reiserfs_add_tail_list(struct inode
*inode
, struct buffer_head
*bh
)
784 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 1);
786 int reiserfs_add_ordered_list(struct inode
*inode
, struct buffer_head
*bh
)
788 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 0);
791 #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
792 static int write_ordered_buffers(spinlock_t
* lock
,
793 struct reiserfs_journal
*j
,
794 struct reiserfs_journal_list
*jl
,
795 struct list_head
*list
)
797 struct buffer_head
*bh
;
798 struct reiserfs_jh
*jh
;
799 int ret
= j
->j_errno
;
800 struct buffer_chunk chunk
;
801 struct list_head tmp
;
802 INIT_LIST_HEAD(&tmp
);
806 while (!list_empty(list
)) {
807 jh
= JH_ENTRY(list
->next
);
810 if (!trylock_buffer(bh
)) {
811 if (!buffer_dirty(bh
)) {
812 list_move(&jh
->list
, &tmp
);
817 write_ordered_chunk(&chunk
);
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
828 if (!buffer_uptodate(bh
) && buffer_dirty(bh
)) {
829 clear_buffer_dirty(bh
);
832 if (buffer_dirty(bh
)) {
833 list_move(&jh
->list
, &tmp
);
834 add_to_chunk(&chunk
, bh
, lock
, write_ordered_chunk
);
836 reiserfs_free_jh(bh
);
841 cond_resched_lock(lock
);
845 write_ordered_chunk(&chunk
);
848 while (!list_empty(&tmp
)) {
849 jh
= JH_ENTRY(tmp
.prev
);
852 reiserfs_free_jh(bh
);
854 if (buffer_locked(bh
)) {
859 if (!buffer_uptodate(bh
)) {
863 * ugly interaction with invalidatepage here.
864 * reiserfs_invalidate_page will pin any buffer that has a
865 * valid journal head from an older transaction. If someone
866 * else sets our buffer dirty after we write it in the first
867 * loop, and then someone truncates the page away, nobody
868 * will ever write the buffer. We're safe if we write the
869 * page one last time after freeing the journal header.
871 if (buffer_dirty(bh
) && unlikely(bh
->b_page
->mapping
== NULL
)) {
873 ll_rw_block(WRITE
, 1, &bh
);
877 cond_resched_lock(lock
);
883 static int flush_older_commits(struct super_block
*s
,
884 struct reiserfs_journal_list
*jl
)
886 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
887 struct reiserfs_journal_list
*other_jl
;
888 struct reiserfs_journal_list
*first_jl
;
889 struct list_head
*entry
;
890 unsigned int trans_id
= jl
->j_trans_id
;
891 unsigned int other_trans_id
;
892 unsigned int first_trans_id
;
896 * first we walk backwards to find the oldest uncommitted transation
899 entry
= jl
->j_list
.prev
;
901 other_jl
= JOURNAL_LIST_ENTRY(entry
);
902 if (entry
== &journal
->j_journal_list
||
903 atomic_read(&other_jl
->j_older_commits_done
))
907 entry
= other_jl
->j_list
.prev
;
910 /* if we didn't find any older uncommitted transactions, return now */
911 if (first_jl
== jl
) {
915 first_trans_id
= first_jl
->j_trans_id
;
917 entry
= &first_jl
->j_list
;
919 other_jl
= JOURNAL_LIST_ENTRY(entry
);
920 other_trans_id
= other_jl
->j_trans_id
;
922 if (other_trans_id
< trans_id
) {
923 if (atomic_read(&other_jl
->j_commit_left
) != 0) {
924 flush_commit_list(s
, other_jl
, 0);
926 /* list we were called with is gone, return */
927 if (!journal_list_still_alive(s
, trans_id
))
931 * the one we just flushed is gone, this means
932 * all older lists are also gone, so first_jl
933 * is no longer valid either. Go back to the
936 if (!journal_list_still_alive
937 (s
, other_trans_id
)) {
942 if (entry
== &journal
->j_journal_list
)
951 static int reiserfs_async_progress_wait(struct super_block
*s
)
953 struct reiserfs_journal
*j
= SB_JOURNAL(s
);
955 if (atomic_read(&j
->j_async_throttle
)) {
958 depth
= reiserfs_write_unlock_nested(s
);
959 congestion_wait(BLK_RW_ASYNC
, HZ
/ 10);
960 reiserfs_write_lock_nested(s
, depth
);
967 * if this journal list still has commit blocks unflushed, send them to disk.
969 * log areas must be flushed in order (transaction 2 can't commit before
970 * transaction 1) Before the commit block can by written, every other log
971 * block must be safely on disk
973 static int flush_commit_list(struct super_block
*s
,
974 struct reiserfs_journal_list
*jl
, int flushall
)
978 struct buffer_head
*tbh
= NULL
;
979 unsigned int trans_id
= jl
->j_trans_id
;
980 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
985 reiserfs_check_lock_depth(s
, "flush_commit_list");
987 if (atomic_read(&jl
->j_older_commits_done
)) {
992 * before we can put our commit blocks on disk, we have to make
993 * sure everyone older than us is on disk too
995 BUG_ON(jl
->j_len
<= 0);
996 BUG_ON(trans_id
== journal
->j_trans_id
);
998 get_journal_list(jl
);
1000 if (flush_older_commits(s
, jl
) == 1) {
1002 * list disappeared during flush_older_commits.
1009 /* make sure nobody is trying to flush this one at the same time */
1010 reiserfs_mutex_lock_safe(&jl
->j_commit_mutex
, s
);
1012 if (!journal_list_still_alive(s
, trans_id
)) {
1013 mutex_unlock(&jl
->j_commit_mutex
);
1016 BUG_ON(jl
->j_trans_id
== 0);
1018 /* this commit is done, exit */
1019 if (atomic_read(&jl
->j_commit_left
) <= 0) {
1021 atomic_set(&jl
->j_older_commits_done
, 1);
1023 mutex_unlock(&jl
->j_commit_mutex
);
1027 if (!list_empty(&jl
->j_bh_list
)) {
1031 * We might sleep in numerous places inside
1032 * write_ordered_buffers. Relax the write lock.
1034 depth
= reiserfs_write_unlock_nested(s
);
1035 ret
= write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
1036 journal
, jl
, &jl
->j_bh_list
);
1037 if (ret
< 0 && retval
== 0)
1039 reiserfs_write_lock_nested(s
, depth
);
1041 BUG_ON(!list_empty(&jl
->j_bh_list
));
1043 * for the description block and all the log blocks, submit any buffers
1044 * that haven't already reached the disk. Try to write at least 256
1045 * log blocks. later on, we will only wait on blocks that correspond
1046 * to this transaction, but while we're unplugging we might as well
1047 * get a chunk of data on there.
1049 atomic_inc(&journal
->j_async_throttle
);
1050 write_len
= jl
->j_len
+ 1;
1051 if (write_len
< 256)
1053 for (i
= 0 ; i
< write_len
; i
++) {
1054 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) + (jl
->j_start
+ i
) %
1055 SB_ONDISK_JOURNAL_SIZE(s
);
1056 tbh
= journal_find_get_block(s
, bn
);
1058 if (buffer_dirty(tbh
)) {
1059 depth
= reiserfs_write_unlock_nested(s
);
1060 ll_rw_block(WRITE
, 1, &tbh
);
1061 reiserfs_write_lock_nested(s
, depth
);
1066 atomic_dec(&journal
->j_async_throttle
);
1068 for (i
= 0; i
< (jl
->j_len
+ 1); i
++) {
1069 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) +
1070 (jl
->j_start
+ i
) % SB_ONDISK_JOURNAL_SIZE(s
);
1071 tbh
= journal_find_get_block(s
, bn
);
1073 depth
= reiserfs_write_unlock_nested(s
);
1074 __wait_on_buffer(tbh
);
1075 reiserfs_write_lock_nested(s
, depth
);
1077 * since we're using ll_rw_blk above, it might have skipped
1078 * over a locked buffer. Double check here
1080 /* redundant, sync_dirty_buffer() checks */
1081 if (buffer_dirty(tbh
)) {
1082 depth
= reiserfs_write_unlock_nested(s
);
1083 sync_dirty_buffer(tbh
);
1084 reiserfs_write_lock_nested(s
, depth
);
1086 if (unlikely(!buffer_uptodate(tbh
))) {
1087 #ifdef CONFIG_REISERFS_CHECK
1088 reiserfs_warning(s
, "journal-601",
1089 "buffer write failed");
1093 /* once for journal_find_get_block */
1095 /* once due to original getblk in do_journal_end */
1097 atomic_dec(&jl
->j_commit_left
);
1100 BUG_ON(atomic_read(&jl
->j_commit_left
) != 1);
1103 * If there was a write error in the journal - we can't commit
1104 * this transaction - it will be invalid and, if successful,
1105 * will just end up propagating the write error out to
1108 if (likely(!retval
&& !reiserfs_is_journal_aborted (journal
))) {
1109 if (buffer_dirty(jl
->j_commit_bh
))
1111 mark_buffer_dirty(jl
->j_commit_bh
) ;
1112 depth
= reiserfs_write_unlock_nested(s
);
1113 if (reiserfs_barrier_flush(s
))
1114 __sync_dirty_buffer(jl
->j_commit_bh
, WRITE_FLUSH_FUA
);
1116 sync_dirty_buffer(jl
->j_commit_bh
);
1117 reiserfs_write_lock_nested(s
, depth
);
1121 * If there was a write error in the journal - we can't commit this
1122 * transaction - it will be invalid and, if successful, will just end
1123 * up propagating the write error out to the filesystem.
1125 if (unlikely(!buffer_uptodate(jl
->j_commit_bh
))) {
1126 #ifdef CONFIG_REISERFS_CHECK
1127 reiserfs_warning(s
, "journal-615", "buffer write failed");
1131 bforget(jl
->j_commit_bh
);
1132 if (journal
->j_last_commit_id
!= 0 &&
1133 (jl
->j_trans_id
- journal
->j_last_commit_id
) != 1) {
1134 reiserfs_warning(s
, "clm-2200", "last commit %lu, current %lu",
1135 journal
->j_last_commit_id
, jl
->j_trans_id
);
1137 journal
->j_last_commit_id
= jl
->j_trans_id
;
1140 * now, every commit block is on the disk. It is safe to allow
1141 * blocks freed during this transaction to be reallocated
1143 cleanup_freed_for_journal_list(s
, jl
);
1145 retval
= retval
? retval
: journal
->j_errno
;
1147 /* mark the metadata dirty */
1149 dirty_one_transaction(s
, jl
);
1150 atomic_dec(&jl
->j_commit_left
);
1153 atomic_set(&jl
->j_older_commits_done
, 1);
1155 mutex_unlock(&jl
->j_commit_mutex
);
1157 put_journal_list(s
, jl
);
1160 reiserfs_abort(s
, retval
, "Journal write error in %s",
1166 * flush_journal_list frequently needs to find a newer transaction for a
1167 * given block. This does that, or returns NULL if it can't find anything
1169 static struct reiserfs_journal_list
*find_newer_jl_for_cn(struct
1170 reiserfs_journal_cnode
1173 struct super_block
*sb
= cn
->sb
;
1174 b_blocknr_t blocknr
= cn
->blocknr
;
1178 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
) {
1186 static void remove_journal_hash(struct super_block
*,
1187 struct reiserfs_journal_cnode
**,
1188 struct reiserfs_journal_list
*, unsigned long,
1192 * once all the real blocks have been flushed, it is safe to remove them
1193 * from the journal list for this transaction. Aside from freeing the
1194 * cnode, this also allows the block to be reallocated for data blocks
1195 * if it had been deleted.
1197 static void remove_all_from_journal_list(struct super_block
*sb
,
1198 struct reiserfs_journal_list
*jl
,
1201 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
1202 struct reiserfs_journal_cnode
*cn
, *last
;
1203 cn
= jl
->j_realblock
;
1206 * which is better, to lock once around the whole loop, or
1207 * to lock for each call to remove_journal_hash?
1210 if (cn
->blocknr
!= 0) {
1212 reiserfs_warning(sb
, "reiserfs-2201",
1213 "block %u, bh is %d, state %ld",
1214 cn
->blocknr
, cn
->bh
? 1 : 0,
1218 remove_journal_hash(sb
, journal
->j_list_hash_table
,
1219 jl
, cn
->blocknr
, 1);
1223 free_cnode(sb
, last
);
1225 jl
->j_realblock
= NULL
;
1229 * if this timestamp is greater than the timestamp we wrote last to the
1230 * header block, write it to the header block. once this is done, I can
1231 * safely say the log area for this transaction won't ever be replayed,
1232 * and I can start releasing blocks in this transaction for reuse as data
1233 * blocks. called by flush_journal_list, before it calls
1234 * remove_all_from_journal_list
1236 static int _update_journal_header_block(struct super_block
*sb
,
1237 unsigned long offset
,
1238 unsigned int trans_id
)
1240 struct reiserfs_journal_header
*jh
;
1241 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
1244 if (reiserfs_is_journal_aborted(journal
))
1247 if (trans_id
>= journal
->j_last_flush_trans_id
) {
1248 if (buffer_locked((journal
->j_header_bh
))) {
1249 depth
= reiserfs_write_unlock_nested(sb
);
1250 __wait_on_buffer(journal
->j_header_bh
);
1251 reiserfs_write_lock_nested(sb
, depth
);
1252 if (unlikely(!buffer_uptodate(journal
->j_header_bh
))) {
1253 #ifdef CONFIG_REISERFS_CHECK
1254 reiserfs_warning(sb
, "journal-699",
1255 "buffer write failed");
1260 journal
->j_last_flush_trans_id
= trans_id
;
1261 journal
->j_first_unflushed_offset
= offset
;
1262 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->
1264 jh
->j_last_flush_trans_id
= cpu_to_le32(trans_id
);
1265 jh
->j_first_unflushed_offset
= cpu_to_le32(offset
);
1266 jh
->j_mount_id
= cpu_to_le32(journal
->j_mount_id
);
1268 set_buffer_dirty(journal
->j_header_bh
);
1269 depth
= reiserfs_write_unlock_nested(sb
);
1271 if (reiserfs_barrier_flush(sb
))
1272 __sync_dirty_buffer(journal
->j_header_bh
, WRITE_FLUSH_FUA
);
1274 sync_dirty_buffer(journal
->j_header_bh
);
1276 reiserfs_write_lock_nested(sb
, depth
);
1277 if (!buffer_uptodate(journal
->j_header_bh
)) {
1278 reiserfs_warning(sb
, "journal-837",
1279 "IO error during journal replay");
1286 static int update_journal_header_block(struct super_block
*sb
,
1287 unsigned long offset
,
1288 unsigned int trans_id
)
1290 return _update_journal_header_block(sb
, offset
, trans_id
);
1294 ** flush any and all journal lists older than you are
1295 ** can only be called from flush_journal_list
1297 static int flush_older_journal_lists(struct super_block
*sb
,
1298 struct reiserfs_journal_list
*jl
)
1300 struct list_head
*entry
;
1301 struct reiserfs_journal_list
*other_jl
;
1302 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
1303 unsigned int trans_id
= jl
->j_trans_id
;
1306 * we know we are the only ones flushing things, no extra race
1307 * protection is required.
1310 entry
= journal
->j_journal_list
.next
;
1312 if (entry
== &journal
->j_journal_list
)
1314 other_jl
= JOURNAL_LIST_ENTRY(entry
);
1315 if (other_jl
->j_trans_id
< trans_id
) {
1316 BUG_ON(other_jl
->j_refcount
<= 0);
1317 /* do not flush all */
1318 flush_journal_list(sb
, other_jl
, 0);
1320 /* other_jl is now deleted from the list */
1326 static void del_from_work_list(struct super_block
*s
,
1327 struct reiserfs_journal_list
*jl
)
1329 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1330 if (!list_empty(&jl
->j_working_list
)) {
1331 list_del_init(&jl
->j_working_list
);
1332 journal
->j_num_work_lists
--;
1337 * flush a journal list, both commit and real blocks
1339 * always set flushall to 1, unless you are calling from inside
1340 * flush_journal_list
1342 * IMPORTANT. This can only be called while there are no journal writers,
1343 * and the journal is locked. That means it can only be called from
1344 * do_journal_end, or by journal_release
1346 static int flush_journal_list(struct super_block
*s
,
1347 struct reiserfs_journal_list
*jl
, int flushall
)
1349 struct reiserfs_journal_list
*pjl
;
1350 struct reiserfs_journal_cnode
*cn
, *last
;
1354 struct buffer_head
*saved_bh
;
1355 unsigned long j_len_saved
= jl
->j_len
;
1356 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1360 BUG_ON(j_len_saved
<= 0);
1362 if (atomic_read(&journal
->j_wcount
) != 0) {
1363 reiserfs_warning(s
, "clm-2048", "called with wcount %d",
1364 atomic_read(&journal
->j_wcount
));
1367 /* if flushall == 0, the lock is already held */
1369 reiserfs_mutex_lock_safe(&journal
->j_flush_mutex
, s
);
1370 } else if (mutex_trylock(&journal
->j_flush_mutex
)) {
1375 if (j_len_saved
> journal
->j_trans_max
) {
1376 reiserfs_panic(s
, "journal-715", "length is %lu, trans id %lu",
1377 j_len_saved
, jl
->j_trans_id
);
1381 /* if all the work is already done, get out of here */
1382 if (atomic_read(&jl
->j_nonzerolen
) <= 0 &&
1383 atomic_read(&jl
->j_commit_left
) <= 0) {
1384 goto flush_older_and_return
;
1388 * start by putting the commit list on disk. This will also flush
1389 * the commit lists of any olders transactions
1391 flush_commit_list(s
, jl
, 1);
1393 if (!(jl
->j_state
& LIST_DIRTY
)
1394 && !reiserfs_is_journal_aborted(journal
))
1397 /* are we done now? */
1398 if (atomic_read(&jl
->j_nonzerolen
) <= 0 &&
1399 atomic_read(&jl
->j_commit_left
) <= 0) {
1400 goto flush_older_and_return
;
1404 * loop through each cnode, see if we need to write it,
1405 * or wait on a more recent transaction, or just ignore it
1407 if (atomic_read(&journal
->j_wcount
) != 0) {
1408 reiserfs_panic(s
, "journal-844", "journal list is flushing, "
1411 cn
= jl
->j_realblock
;
1416 /* blocknr of 0 is no longer in the hash, ignore it */
1417 if (cn
->blocknr
== 0) {
1422 * This transaction failed commit.
1423 * Don't write out to the disk
1425 if (!(jl
->j_state
& LIST_DIRTY
))
1428 pjl
= find_newer_jl_for_cn(cn
);
1430 * the order is important here. We check pjl to make sure we
1431 * don't clear BH_JDirty_wait if we aren't the one writing this
1434 if (!pjl
&& cn
->bh
) {
1438 * we do this to make sure nobody releases the
1439 * buffer while we are working with it
1443 if (buffer_journal_dirty(saved_bh
)) {
1444 BUG_ON(!can_dirty(cn
));
1447 } else if (can_dirty(cn
)) {
1449 * everything with !pjl && jwait
1450 * should be writable
1457 * if someone has this block in a newer transaction, just make
1458 * sure they are committed, and don't try writing it to disk
1461 if (atomic_read(&pjl
->j_commit_left
))
1462 flush_commit_list(s
, pjl
, 1);
1467 * bh == NULL when the block got to disk on its own, OR,
1468 * the block got freed in a future transaction
1470 if (saved_bh
== NULL
) {
1475 * this should never happen. kupdate_one_transaction has
1476 * this list locked while it works, so we should never see a
1477 * buffer here that is not marked JDirty_wait
1479 if ((!was_jwait
) && !buffer_locked(saved_bh
)) {
1480 reiserfs_warning(s
, "journal-813",
1481 "BAD! buffer %llu %cdirty %cjwait, "
1482 "not in a newer tranasction",
1483 (unsigned long long)saved_bh
->
1484 b_blocknr
, was_dirty
? ' ' : '!',
1485 was_jwait
? ' ' : '!');
1489 * we inc again because saved_bh gets decremented
1493 set_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
);
1494 lock_buffer(saved_bh
);
1495 BUG_ON(cn
->blocknr
!= saved_bh
->b_blocknr
);
1496 if (buffer_dirty(saved_bh
))
1497 submit_logged_buffer(saved_bh
);
1499 unlock_buffer(saved_bh
);
1502 reiserfs_warning(s
, "clm-2082",
1503 "Unable to flush buffer %llu in %s",
1504 (unsigned long long)saved_bh
->
1505 b_blocknr
, __func__
);
1512 * we incremented this to keep others from
1513 * taking the buffer head away
1516 if (atomic_read(&saved_bh
->b_count
) < 0) {
1517 reiserfs_warning(s
, "journal-945",
1518 "saved_bh->b_count < 0");
1523 cn
= jl
->j_realblock
;
1525 if (test_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
)) {
1527 reiserfs_panic(s
, "journal-1011",
1531 depth
= reiserfs_write_unlock_nested(s
);
1532 __wait_on_buffer(cn
->bh
);
1533 reiserfs_write_lock_nested(s
, depth
);
1536 reiserfs_panic(s
, "journal-1012",
1539 if (unlikely(!buffer_uptodate(cn
->bh
))) {
1540 #ifdef CONFIG_REISERFS_CHECK
1541 reiserfs_warning(s
, "journal-949",
1542 "buffer write failed");
1547 * note, we must clear the JDirty_wait bit
1548 * after the up to date check, otherwise we
1549 * race against our flushpage routine
1551 BUG_ON(!test_clear_buffer_journal_dirty
1554 /* drop one ref for us */
1556 /* drop one ref for journal_mark_dirty */
1557 release_buffer_page(cn
->bh
);
1564 reiserfs_abort(s
, -EIO
,
1565 "Write error while pushing transaction to disk in %s",
1567 flush_older_and_return
:
1570 * before we can update the journal header block, we _must_ flush all
1571 * real blocks from all older transactions to disk. This is because
1572 * once the header block is updated, this transaction will not be
1573 * replayed after a crash
1576 flush_older_journal_lists(s
, jl
);
1579 err
= journal
->j_errno
;
1581 * before we can remove everything from the hash tables for this
1582 * transaction, we must make sure it can never be replayed
1584 * since we are only called from do_journal_end, we know for sure there
1585 * are no allocations going on while we are flushing journal lists. So,
1586 * we only need to update the journal header block for the last list
1589 if (!err
&& flushall
) {
1591 update_journal_header_block(s
,
1592 (jl
->j_start
+ jl
->j_len
+
1593 2) % SB_ONDISK_JOURNAL_SIZE(s
),
1596 reiserfs_abort(s
, -EIO
,
1597 "Write error while updating journal header in %s",
1600 remove_all_from_journal_list(s
, jl
, 0);
1601 list_del_init(&jl
->j_list
);
1602 journal
->j_num_lists
--;
1603 del_from_work_list(s
, jl
);
1605 if (journal
->j_last_flush_id
!= 0 &&
1606 (jl
->j_trans_id
- journal
->j_last_flush_id
) != 1) {
1607 reiserfs_warning(s
, "clm-2201", "last flush %lu, current %lu",
1608 journal
->j_last_flush_id
, jl
->j_trans_id
);
1610 journal
->j_last_flush_id
= jl
->j_trans_id
;
1613 * not strictly required since we are freeing the list, but it should
1614 * help find code using dead lists later on
1617 atomic_set(&jl
->j_nonzerolen
, 0);
1619 jl
->j_realblock
= NULL
;
1620 jl
->j_commit_bh
= NULL
;
1623 put_journal_list(s
, jl
);
1625 mutex_unlock(&journal
->j_flush_mutex
);
1629 static int write_one_transaction(struct super_block
*s
,
1630 struct reiserfs_journal_list
*jl
,
1631 struct buffer_chunk
*chunk
)
1633 struct reiserfs_journal_cnode
*cn
;
1636 jl
->j_state
|= LIST_TOUCHED
;
1637 del_from_work_list(s
, jl
);
1638 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0) {
1642 cn
= jl
->j_realblock
;
1645 * if the blocknr == 0, this has been cleared from the hash,
1648 if (cn
->blocknr
== 0) {
1651 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(cn
->bh
)) {
1652 struct buffer_head
*tmp_bh
;
1654 * we can race against journal_mark_freed when we try
1655 * to lock_buffer(cn->bh), so we have to inc the buffer
1656 * count, and recheck things after locking
1660 lock_buffer(tmp_bh
);
1661 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(tmp_bh
)) {
1662 if (!buffer_journal_dirty(tmp_bh
) ||
1663 buffer_journal_prepared(tmp_bh
))
1665 add_to_chunk(chunk
, tmp_bh
, NULL
, write_chunk
);
1668 /* note, cn->bh might be null now */
1669 unlock_buffer(tmp_bh
);
1680 /* used by flush_commit_list */
1681 static int dirty_one_transaction(struct super_block
*s
,
1682 struct reiserfs_journal_list
*jl
)
1684 struct reiserfs_journal_cnode
*cn
;
1685 struct reiserfs_journal_list
*pjl
;
1688 jl
->j_state
|= LIST_DIRTY
;
1689 cn
= jl
->j_realblock
;
1692 * look for a more recent transaction that logged this
1693 * buffer. Only the most recent transaction with a buffer in
1694 * it is allowed to send that buffer to disk
1696 pjl
= find_newer_jl_for_cn(cn
);
1697 if (!pjl
&& cn
->blocknr
&& cn
->bh
1698 && buffer_journal_dirty(cn
->bh
)) {
1699 BUG_ON(!can_dirty(cn
));
1701 * if the buffer is prepared, it will either be logged
1702 * or restored. If restored, we need to make sure
1703 * it actually gets marked dirty
1705 clear_buffer_journal_new(cn
->bh
);
1706 if (buffer_journal_prepared(cn
->bh
)) {
1707 set_buffer_journal_restore_dirty(cn
->bh
);
1709 set_buffer_journal_test(cn
->bh
);
1710 mark_buffer_dirty(cn
->bh
);
1718 static int kupdate_transactions(struct super_block
*s
,
1719 struct reiserfs_journal_list
*jl
,
1720 struct reiserfs_journal_list
**next_jl
,
1721 unsigned int *next_trans_id
,
1722 int num_blocks
, int num_trans
)
1726 int transactions_flushed
= 0;
1727 unsigned int orig_trans_id
= jl
->j_trans_id
;
1728 struct buffer_chunk chunk
;
1729 struct list_head
*entry
;
1730 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1733 reiserfs_mutex_lock_safe(&journal
->j_flush_mutex
, s
);
1734 if (!journal_list_still_alive(s
, orig_trans_id
)) {
1739 * we've got j_flush_mutex held, nobody is going to delete any
1740 * of these lists out from underneath us
1742 while ((num_trans
&& transactions_flushed
< num_trans
) ||
1743 (!num_trans
&& written
< num_blocks
)) {
1745 if (jl
->j_len
== 0 || (jl
->j_state
& LIST_TOUCHED
) ||
1746 atomic_read(&jl
->j_commit_left
)
1747 || !(jl
->j_state
& LIST_DIRTY
)) {
1748 del_from_work_list(s
, jl
);
1751 ret
= write_one_transaction(s
, jl
, &chunk
);
1755 transactions_flushed
++;
1757 entry
= jl
->j_list
.next
;
1760 if (entry
== &journal
->j_journal_list
) {
1763 jl
= JOURNAL_LIST_ENTRY(entry
);
1765 /* don't bother with older transactions */
1766 if (jl
->j_trans_id
<= orig_trans_id
)
1770 write_chunk(&chunk
);
1774 mutex_unlock(&journal
->j_flush_mutex
);
1779 * for o_sync and fsync heavy applications, they tend to use
1780 * all the journa list slots with tiny transactions. These
1781 * trigger lots and lots of calls to update the header block, which
1782 * adds seeks and slows things down.
1784 * This function tries to clear out a large chunk of the journal lists
1785 * at once, which makes everything faster since only the newest journal
1786 * list updates the header block
1788 static int flush_used_journal_lists(struct super_block
*s
,
1789 struct reiserfs_journal_list
*jl
)
1791 unsigned long len
= 0;
1792 unsigned long cur_len
;
1796 struct reiserfs_journal_list
*tjl
;
1797 struct reiserfs_journal_list
*flush_jl
;
1798 unsigned int trans_id
;
1799 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1801 flush_jl
= tjl
= jl
;
1803 /* in data logging mode, try harder to flush a lot of blocks */
1804 if (reiserfs_data_log(s
))
1806 /* flush for 256 transactions or limit blocks, whichever comes first */
1807 for (i
= 0; i
< 256 && len
< limit
; i
++) {
1808 if (atomic_read(&tjl
->j_commit_left
) ||
1809 tjl
->j_trans_id
< jl
->j_trans_id
) {
1812 cur_len
= atomic_read(&tjl
->j_nonzerolen
);
1814 tjl
->j_state
&= ~LIST_TOUCHED
;
1818 if (tjl
->j_list
.next
== &journal
->j_journal_list
)
1820 tjl
= JOURNAL_LIST_ENTRY(tjl
->j_list
.next
);
1822 get_journal_list(jl
);
1823 get_journal_list(flush_jl
);
1826 * try to find a group of blocks we can flush across all the
1827 * transactions, but only bother if we've actually spanned
1828 * across multiple lists
1830 if (flush_jl
!= jl
) {
1831 ret
= kupdate_transactions(s
, jl
, &tjl
, &trans_id
, len
, i
);
1833 flush_journal_list(s
, flush_jl
, 1);
1834 put_journal_list(s
, flush_jl
);
1835 put_journal_list(s
, jl
);
1840 * removes any nodes in table with name block and dev as bh.
1841 * only touchs the hnext and hprev pointers.
1843 void remove_journal_hash(struct super_block
*sb
,
1844 struct reiserfs_journal_cnode
**table
,
1845 struct reiserfs_journal_list
*jl
,
1846 unsigned long block
, int remove_freed
)
1848 struct reiserfs_journal_cnode
*cur
;
1849 struct reiserfs_journal_cnode
**head
;
1851 head
= &(journal_hash(table
, sb
, block
));
1857 if (cur
->blocknr
== block
&& cur
->sb
== sb
1858 && (jl
== NULL
|| jl
== cur
->jlist
)
1859 && (!test_bit(BLOCK_FREED
, &cur
->state
) || remove_freed
)) {
1861 cur
->hnext
->hprev
= cur
->hprev
;
1864 cur
->hprev
->hnext
= cur
->hnext
;
1872 * anybody who clears the cur->bh will also
1873 * dec the nonzerolen
1875 if (cur
->bh
&& cur
->jlist
)
1876 atomic_dec(&cur
->jlist
->j_nonzerolen
);
1884 static void free_journal_ram(struct super_block
*sb
)
1886 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
1887 kfree(journal
->j_current_jl
);
1888 journal
->j_num_lists
--;
1890 vfree(journal
->j_cnode_free_orig
);
1891 free_list_bitmaps(sb
, journal
->j_list_bitmap
);
1892 free_bitmap_nodes(sb
); /* must be after free_list_bitmaps */
1893 if (journal
->j_header_bh
) {
1894 brelse(journal
->j_header_bh
);
1897 * j_header_bh is on the journal dev, make sure
1898 * not to release the journal dev until we brelse j_header_bh
1900 release_journal_dev(sb
, journal
);
1905 * call on unmount. Only set error to 1 if you haven't made your way out
1906 * of read_super() yet. Any other caller must keep error at 0.
1908 static int do_journal_release(struct reiserfs_transaction_handle
*th
,
1909 struct super_block
*sb
, int error
)
1911 struct reiserfs_transaction_handle myth
;
1913 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
1916 * we only want to flush out transactions if we were
1917 * called with error == 0
1919 if (!error
&& !(sb
->s_flags
& MS_RDONLY
)) {
1920 /* end the current trans */
1921 BUG_ON(!th
->t_trans_id
);
1922 do_journal_end(th
, FLUSH_ALL
);
1925 * make sure something gets logged to force
1926 * our way into the flush code
1928 if (!journal_join(&myth
, sb
)) {
1929 reiserfs_prepare_for_journal(sb
,
1930 SB_BUFFER_WITH_SB(sb
),
1932 journal_mark_dirty(&myth
, SB_BUFFER_WITH_SB(sb
));
1933 do_journal_end(&myth
, FLUSH_ALL
);
1938 /* this also catches errors during the do_journal_end above */
1939 if (!error
&& reiserfs_is_journal_aborted(journal
)) {
1940 memset(&myth
, 0, sizeof(myth
));
1941 if (!journal_join_abort(&myth
, sb
)) {
1942 reiserfs_prepare_for_journal(sb
,
1943 SB_BUFFER_WITH_SB(sb
),
1945 journal_mark_dirty(&myth
, SB_BUFFER_WITH_SB(sb
));
1946 do_journal_end(&myth
, FLUSH_ALL
);
1950 /* wait for all commits to finish */
1951 cancel_delayed_work(&SB_JOURNAL(sb
)->j_work
);
1954 * We must release the write lock here because
1955 * the workqueue job (flush_async_commit) needs this lock
1957 reiserfs_write_unlock(sb
);
1959 cancel_delayed_work_sync(&REISERFS_SB(sb
)->old_work
);
1960 flush_workqueue(REISERFS_SB(sb
)->commit_wq
);
1962 free_journal_ram(sb
);
1964 reiserfs_write_lock(sb
);
1969 /* * call on unmount. flush all journal trans, release all alloc'd ram */
1970 int journal_release(struct reiserfs_transaction_handle
*th
,
1971 struct super_block
*sb
)
1973 return do_journal_release(th
, sb
, 0);
1976 /* only call from an error condition inside reiserfs_read_super! */
1977 int journal_release_error(struct reiserfs_transaction_handle
*th
,
1978 struct super_block
*sb
)
1980 return do_journal_release(th
, sb
, 1);
1984 * compares description block with commit block.
1985 * returns 1 if they differ, 0 if they are the same
1987 static int journal_compare_desc_commit(struct super_block
*sb
,
1988 struct reiserfs_journal_desc
*desc
,
1989 struct reiserfs_journal_commit
*commit
)
1991 if (get_commit_trans_id(commit
) != get_desc_trans_id(desc
) ||
1992 get_commit_trans_len(commit
) != get_desc_trans_len(desc
) ||
1993 get_commit_trans_len(commit
) > SB_JOURNAL(sb
)->j_trans_max
||
1994 get_commit_trans_len(commit
) <= 0) {
2001 * returns 0 if it did not find a description block
2002 * returns -1 if it found a corrupt commit block
2003 * returns 1 if both desc and commit were valid
2004 * NOTE: only called during fs mount
2006 static int journal_transaction_is_valid(struct super_block
*sb
,
2007 struct buffer_head
*d_bh
,
2008 unsigned int *oldest_invalid_trans_id
,
2009 unsigned long *newest_mount_id
)
2011 struct reiserfs_journal_desc
*desc
;
2012 struct reiserfs_journal_commit
*commit
;
2013 struct buffer_head
*c_bh
;
2014 unsigned long offset
;
2019 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2020 if (get_desc_trans_len(desc
) > 0
2021 && !memcmp(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8)) {
2022 if (oldest_invalid_trans_id
&& *oldest_invalid_trans_id
2023 && get_desc_trans_id(desc
) > *oldest_invalid_trans_id
) {
2024 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2025 "journal-986: transaction "
2026 "is valid returning because trans_id %d is greater than "
2027 "oldest_invalid %lu",
2028 get_desc_trans_id(desc
),
2029 *oldest_invalid_trans_id
);
2033 && *newest_mount_id
> get_desc_mount_id(desc
)) {
2034 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2035 "journal-1087: transaction "
2036 "is valid returning because mount_id %d is less than "
2037 "newest_mount_id %lu",
2038 get_desc_mount_id(desc
),
2042 if (get_desc_trans_len(desc
) > SB_JOURNAL(sb
)->j_trans_max
) {
2043 reiserfs_warning(sb
, "journal-2018",
2044 "Bad transaction length %d "
2045 "encountered, ignoring transaction",
2046 get_desc_trans_len(desc
));
2049 offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(sb
);
2052 * ok, we have a journal description block,
2053 * let's see if the transaction was valid
2057 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2058 ((offset
+ get_desc_trans_len(desc
) +
2059 1) % SB_ONDISK_JOURNAL_SIZE(sb
)));
2062 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2063 if (journal_compare_desc_commit(sb
, desc
, commit
)) {
2064 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2065 "journal_transaction_is_valid, commit offset %ld had bad "
2066 "time %d or length %d",
2068 SB_ONDISK_JOURNAL_1st_BLOCK(sb
),
2069 get_commit_trans_id(commit
),
2070 get_commit_trans_len(commit
));
2072 if (oldest_invalid_trans_id
) {
2073 *oldest_invalid_trans_id
=
2074 get_desc_trans_id(desc
);
2075 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2077 "transaction_is_valid setting oldest invalid trans_id "
2079 get_desc_trans_id(desc
));
2084 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2085 "journal-1006: found valid "
2086 "transaction start offset %llu, len %d id %d",
2088 SB_ONDISK_JOURNAL_1st_BLOCK(sb
),
2089 get_desc_trans_len(desc
),
2090 get_desc_trans_id(desc
));
2097 static void brelse_array(struct buffer_head
**heads
, int num
)
2100 for (i
= 0; i
< num
; i
++) {
2106 * given the start, and values for the oldest acceptable transactions,
2107 * this either reads in a replays a transaction, or returns because the
2108 * transaction is invalid, or too old.
2109 * NOTE: only called during fs mount
2111 static int journal_read_transaction(struct super_block
*sb
,
2112 unsigned long cur_dblock
,
2113 unsigned long oldest_start
,
2114 unsigned int oldest_trans_id
,
2115 unsigned long newest_mount_id
)
2117 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2118 struct reiserfs_journal_desc
*desc
;
2119 struct reiserfs_journal_commit
*commit
;
2120 unsigned int trans_id
= 0;
2121 struct buffer_head
*c_bh
;
2122 struct buffer_head
*d_bh
;
2123 struct buffer_head
**log_blocks
= NULL
;
2124 struct buffer_head
**real_blocks
= NULL
;
2125 unsigned int trans_offset
;
2129 d_bh
= journal_bread(sb
, cur_dblock
);
2132 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2133 trans_offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(sb
);
2134 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
, "journal-1037: "
2135 "journal_read_transaction, offset %llu, len %d mount_id %d",
2136 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(sb
),
2137 get_desc_trans_len(desc
), get_desc_mount_id(desc
));
2138 if (get_desc_trans_id(desc
) < oldest_trans_id
) {
2139 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
, "journal-1039: "
2140 "journal_read_trans skipping because %lu is too old",
2142 SB_ONDISK_JOURNAL_1st_BLOCK(sb
));
2146 if (get_desc_mount_id(desc
) != newest_mount_id
) {
2147 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
, "journal-1146: "
2148 "journal_read_trans skipping because %d is != "
2149 "newest_mount_id %lu", get_desc_mount_id(desc
),
2154 c_bh
= journal_bread(sb
, SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2155 ((trans_offset
+ get_desc_trans_len(desc
) + 1) %
2156 SB_ONDISK_JOURNAL_SIZE(sb
)));
2161 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2162 if (journal_compare_desc_commit(sb
, desc
, commit
)) {
2163 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2164 "journal_read_transaction, "
2165 "commit offset %llu had bad time %d or length %d",
2167 SB_ONDISK_JOURNAL_1st_BLOCK(sb
),
2168 get_commit_trans_id(commit
),
2169 get_commit_trans_len(commit
));
2175 if (bdev_read_only(sb
->s_bdev
)) {
2176 reiserfs_warning(sb
, "clm-2076",
2177 "device is readonly, unable to replay log");
2183 trans_id
= get_desc_trans_id(desc
);
2185 * now we know we've got a good transaction, and it was
2186 * inside the valid time ranges
2188 log_blocks
= kmalloc(get_desc_trans_len(desc
) *
2189 sizeof(struct buffer_head
*), GFP_NOFS
);
2190 real_blocks
= kmalloc(get_desc_trans_len(desc
) *
2191 sizeof(struct buffer_head
*), GFP_NOFS
);
2192 if (!log_blocks
|| !real_blocks
) {
2197 reiserfs_warning(sb
, "journal-1169",
2198 "kmalloc failed, unable to mount FS");
2201 /* get all the buffer heads */
2202 trans_half
= journal_trans_half(sb
->s_blocksize
);
2203 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2206 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2208 i
) % SB_ONDISK_JOURNAL_SIZE(sb
));
2209 if (i
< trans_half
) {
2212 le32_to_cpu(desc
->j_realblock
[i
]));
2216 le32_to_cpu(commit
->
2217 j_realblock
[i
- trans_half
]));
2219 if (real_blocks
[i
]->b_blocknr
> SB_BLOCK_COUNT(sb
)) {
2220 reiserfs_warning(sb
, "journal-1207",
2221 "REPLAY FAILURE fsck required! "
2222 "Block to replay is outside of "
2226 /* make sure we don't try to replay onto log or reserved area */
2227 if (is_block_in_log_or_reserved_area
2228 (sb
, real_blocks
[i
]->b_blocknr
)) {
2229 reiserfs_warning(sb
, "journal-1204",
2230 "REPLAY FAILURE fsck required! "
2231 "Trying to replay onto a log block");
2233 brelse_array(log_blocks
, i
);
2234 brelse_array(real_blocks
, i
);
2242 /* read in the log blocks, memcpy to the corresponding real block */
2243 ll_rw_block(READ
, get_desc_trans_len(desc
), log_blocks
);
2244 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2246 wait_on_buffer(log_blocks
[i
]);
2247 if (!buffer_uptodate(log_blocks
[i
])) {
2248 reiserfs_warning(sb
, "journal-1212",
2249 "REPLAY FAILURE fsck required! "
2250 "buffer write failed");
2251 brelse_array(log_blocks
+ i
,
2252 get_desc_trans_len(desc
) - i
);
2253 brelse_array(real_blocks
, get_desc_trans_len(desc
));
2260 memcpy(real_blocks
[i
]->b_data
, log_blocks
[i
]->b_data
,
2261 real_blocks
[i
]->b_size
);
2262 set_buffer_uptodate(real_blocks
[i
]);
2263 brelse(log_blocks
[i
]);
2265 /* flush out the real blocks */
2266 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2267 set_buffer_dirty(real_blocks
[i
]);
2268 write_dirty_buffer(real_blocks
[i
], WRITE
);
2270 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2271 wait_on_buffer(real_blocks
[i
]);
2272 if (!buffer_uptodate(real_blocks
[i
])) {
2273 reiserfs_warning(sb
, "journal-1226",
2274 "REPLAY FAILURE, fsck required! "
2275 "buffer write failed");
2276 brelse_array(real_blocks
+ i
,
2277 get_desc_trans_len(desc
) - i
);
2284 brelse(real_blocks
[i
]);
2287 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2288 ((trans_offset
+ get_desc_trans_len(desc
) +
2289 2) % SB_ONDISK_JOURNAL_SIZE(sb
));
2290 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2291 "journal-1095: setting journal " "start to offset %ld",
2292 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(sb
));
2295 * init starting values for the first transaction, in case
2296 * this is the last transaction to be replayed.
2298 journal
->j_start
= cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(sb
);
2299 journal
->j_last_flush_trans_id
= trans_id
;
2300 journal
->j_trans_id
= trans_id
+ 1;
2301 /* check for trans_id overflow */
2302 if (journal
->j_trans_id
== 0)
2303 journal
->j_trans_id
= 10;
2312 * This function reads blocks starting from block and to max_block of bufsize
2313 * size (but no more than BUFNR blocks at a time). This proved to improve
2314 * mounting speed on self-rebuilding raid5 arrays at least.
2315 * Right now it is only used from journal code. But later we might use it
2316 * from other places.
2317 * Note: Do not use journal_getblk/sb_getblk functions here!
2319 static struct buffer_head
*reiserfs_breada(struct block_device
*dev
,
2320 b_blocknr_t block
, int bufsize
,
2321 b_blocknr_t max_block
)
2323 struct buffer_head
*bhlist
[BUFNR
];
2324 unsigned int blocks
= BUFNR
;
2325 struct buffer_head
*bh
;
2328 bh
= __getblk(dev
, block
, bufsize
);
2329 if (buffer_uptodate(bh
))
2332 if (block
+ BUFNR
> max_block
) {
2333 blocks
= max_block
- block
;
2337 for (i
= 1; i
< blocks
; i
++) {
2338 bh
= __getblk(dev
, block
+ i
, bufsize
);
2339 if (buffer_uptodate(bh
)) {
2345 ll_rw_block(READ
, j
, bhlist
);
2346 for (i
= 1; i
< j
; i
++)
2350 if (buffer_uptodate(bh
))
2357 * read and replay the log
2358 * on a clean unmount, the journal header's next unflushed pointer will be
2359 * to an invalid transaction. This tests that before finding all the
2360 * transactions in the log, which makes normal mount times fast.
2362 * After a crash, this starts with the next unflushed transaction, and
2363 * replays until it finds one too old, or invalid.
2365 * On exit, it sets things up so the first transaction will work correctly.
2366 * NOTE: only called during fs mount
2368 static int journal_read(struct super_block
*sb
)
2370 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2371 struct reiserfs_journal_desc
*desc
;
2372 unsigned int oldest_trans_id
= 0;
2373 unsigned int oldest_invalid_trans_id
= 0;
2375 unsigned long oldest_start
= 0;
2376 unsigned long cur_dblock
= 0;
2377 unsigned long newest_mount_id
= 9;
2378 struct buffer_head
*d_bh
;
2379 struct reiserfs_journal_header
*jh
;
2380 int valid_journal_header
= 0;
2381 int replay_count
= 0;
2382 int continue_replay
= 1;
2384 char b
[BDEVNAME_SIZE
];
2386 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(sb
);
2387 reiserfs_info(sb
, "checking transaction log (%s)\n",
2388 bdevname(journal
->j_dev_bd
, b
));
2389 start
= get_seconds();
2392 * step 1, read in the journal header block. Check the transaction
2393 * it says is the first unflushed, and if that transaction is not
2394 * valid, replay is done
2396 journal
->j_header_bh
= journal_bread(sb
,
2397 SB_ONDISK_JOURNAL_1st_BLOCK(sb
)
2398 + SB_ONDISK_JOURNAL_SIZE(sb
));
2399 if (!journal
->j_header_bh
) {
2402 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
);
2403 if (le32_to_cpu(jh
->j_first_unflushed_offset
) <
2404 SB_ONDISK_JOURNAL_SIZE(sb
)
2405 && le32_to_cpu(jh
->j_last_flush_trans_id
) > 0) {
2407 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2408 le32_to_cpu(jh
->j_first_unflushed_offset
);
2409 oldest_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2410 newest_mount_id
= le32_to_cpu(jh
->j_mount_id
);
2411 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2412 "journal-1153: found in "
2413 "header: first_unflushed_offset %d, last_flushed_trans_id "
2414 "%lu", le32_to_cpu(jh
->j_first_unflushed_offset
),
2415 le32_to_cpu(jh
->j_last_flush_trans_id
));
2416 valid_journal_header
= 1;
2419 * now, we try to read the first unflushed offset. If it
2420 * is not valid, there is nothing more we can do, and it
2421 * makes no sense to read through the whole log.
2425 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2426 le32_to_cpu(jh
->j_first_unflushed_offset
));
2427 ret
= journal_transaction_is_valid(sb
, d_bh
, NULL
, NULL
);
2429 continue_replay
= 0;
2432 goto start_log_replay
;
2436 * ok, there are transactions that need to be replayed. start
2437 * with the first log block, find all the valid transactions, and
2438 * pick out the oldest.
2440 while (continue_replay
2442 (SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2443 SB_ONDISK_JOURNAL_SIZE(sb
))) {
2445 * Note that it is required for blocksize of primary fs
2446 * device and journal device to be the same
2449 reiserfs_breada(journal
->j_dev_bd
, cur_dblock
,
2451 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2452 SB_ONDISK_JOURNAL_SIZE(sb
));
2454 journal_transaction_is_valid(sb
, d_bh
,
2455 &oldest_invalid_trans_id
,
2458 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2459 if (oldest_start
== 0) { /* init all oldest_ values */
2460 oldest_trans_id
= get_desc_trans_id(desc
);
2461 oldest_start
= d_bh
->b_blocknr
;
2462 newest_mount_id
= get_desc_mount_id(desc
);
2463 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2464 "journal-1179: Setting "
2465 "oldest_start to offset %llu, trans_id %lu",
2467 SB_ONDISK_JOURNAL_1st_BLOCK
2468 (sb
), oldest_trans_id
);
2469 } else if (oldest_trans_id
> get_desc_trans_id(desc
)) {
2470 /* one we just read was older */
2471 oldest_trans_id
= get_desc_trans_id(desc
);
2472 oldest_start
= d_bh
->b_blocknr
;
2473 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2474 "journal-1180: Resetting "
2475 "oldest_start to offset %lu, trans_id %lu",
2477 SB_ONDISK_JOURNAL_1st_BLOCK
2478 (sb
), oldest_trans_id
);
2480 if (newest_mount_id
< get_desc_mount_id(desc
)) {
2481 newest_mount_id
= get_desc_mount_id(desc
);
2482 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2483 "journal-1299: Setting "
2484 "newest_mount_id to %d",
2485 get_desc_mount_id(desc
));
2487 cur_dblock
+= get_desc_trans_len(desc
) + 2;
2495 cur_dblock
= oldest_start
;
2496 if (oldest_trans_id
) {
2497 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2498 "journal-1206: Starting replay "
2499 "from offset %llu, trans_id %lu",
2500 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(sb
),
2505 while (continue_replay
&& oldest_trans_id
> 0) {
2507 journal_read_transaction(sb
, cur_dblock
, oldest_start
,
2508 oldest_trans_id
, newest_mount_id
);
2511 } else if (ret
!= 0) {
2515 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) + journal
->j_start
;
2517 if (cur_dblock
== oldest_start
)
2521 if (oldest_trans_id
== 0) {
2522 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
,
2523 "journal-1225: No valid " "transactions found");
2526 * j_start does not get set correctly if we don't replay any
2527 * transactions. if we had a valid journal_header, set j_start
2528 * to the first unflushed transaction value, copy the trans_id
2531 if (valid_journal_header
&& replay_count
== 0) {
2532 journal
->j_start
= le32_to_cpu(jh
->j_first_unflushed_offset
);
2533 journal
->j_trans_id
=
2534 le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2535 /* check for trans_id overflow */
2536 if (journal
->j_trans_id
== 0)
2537 journal
->j_trans_id
= 10;
2538 journal
->j_last_flush_trans_id
=
2539 le32_to_cpu(jh
->j_last_flush_trans_id
);
2540 journal
->j_mount_id
= le32_to_cpu(jh
->j_mount_id
) + 1;
2542 journal
->j_mount_id
= newest_mount_id
+ 1;
2544 reiserfs_debug(sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2545 "newest_mount_id to %lu", journal
->j_mount_id
);
2546 journal
->j_first_unflushed_offset
= journal
->j_start
;
2547 if (replay_count
> 0) {
2549 "replayed %d transactions in %lu seconds\n",
2550 replay_count
, get_seconds() - start
);
2552 /* needed to satisfy the locking in _update_journal_header_block */
2553 reiserfs_write_lock(sb
);
2554 if (!bdev_read_only(sb
->s_bdev
) &&
2555 _update_journal_header_block(sb
, journal
->j_start
,
2556 journal
->j_last_flush_trans_id
)) {
2557 reiserfs_write_unlock(sb
);
2559 * replay failed, caller must call free_journal_ram and abort
2564 reiserfs_write_unlock(sb
);
2568 static struct reiserfs_journal_list
*alloc_journal_list(struct super_block
*s
)
2570 struct reiserfs_journal_list
*jl
;
2571 jl
= kzalloc(sizeof(struct reiserfs_journal_list
),
2572 GFP_NOFS
| __GFP_NOFAIL
);
2573 INIT_LIST_HEAD(&jl
->j_list
);
2574 INIT_LIST_HEAD(&jl
->j_working_list
);
2575 INIT_LIST_HEAD(&jl
->j_tail_bh_list
);
2576 INIT_LIST_HEAD(&jl
->j_bh_list
);
2577 mutex_init(&jl
->j_commit_mutex
);
2578 SB_JOURNAL(s
)->j_num_lists
++;
2579 get_journal_list(jl
);
2583 static void journal_list_init(struct super_block
*sb
)
2585 SB_JOURNAL(sb
)->j_current_jl
= alloc_journal_list(sb
);
2588 static void release_journal_dev(struct super_block
*super
,
2589 struct reiserfs_journal
*journal
)
2591 if (journal
->j_dev_bd
!= NULL
) {
2592 blkdev_put(journal
->j_dev_bd
, journal
->j_dev_mode
);
2593 journal
->j_dev_bd
= NULL
;
2597 static int journal_init_dev(struct super_block
*super
,
2598 struct reiserfs_journal
*journal
,
2599 const char *jdev_name
)
2603 fmode_t blkdev_mode
= FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
;
2604 char b
[BDEVNAME_SIZE
];
2608 journal
->j_dev_bd
= NULL
;
2609 jdev
= SB_ONDISK_JOURNAL_DEVICE(super
) ?
2610 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super
)) : super
->s_dev
;
2612 if (bdev_read_only(super
->s_bdev
))
2613 blkdev_mode
= FMODE_READ
;
2615 /* there is no "jdev" option and journal is on separate device */
2616 if ((!jdev_name
|| !jdev_name
[0])) {
2617 if (jdev
== super
->s_dev
)
2618 blkdev_mode
&= ~FMODE_EXCL
;
2619 journal
->j_dev_bd
= blkdev_get_by_dev(jdev
, blkdev_mode
,
2621 journal
->j_dev_mode
= blkdev_mode
;
2622 if (IS_ERR(journal
->j_dev_bd
)) {
2623 result
= PTR_ERR(journal
->j_dev_bd
);
2624 journal
->j_dev_bd
= NULL
;
2625 reiserfs_warning(super
, "sh-458",
2626 "cannot init journal device '%s': %i",
2627 __bdevname(jdev
, b
), result
);
2629 } else if (jdev
!= super
->s_dev
)
2630 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2635 journal
->j_dev_mode
= blkdev_mode
;
2636 journal
->j_dev_bd
= blkdev_get_by_path(jdev_name
, blkdev_mode
, journal
);
2637 if (IS_ERR(journal
->j_dev_bd
)) {
2638 result
= PTR_ERR(journal
->j_dev_bd
);
2639 journal
->j_dev_bd
= NULL
;
2640 reiserfs_warning(super
,
2641 "journal_init_dev: Cannot open '%s': %i",
2646 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2647 reiserfs_info(super
,
2648 "journal_init_dev: journal device: %s\n",
2649 bdevname(journal
->j_dev_bd
, b
));
2654 * When creating/tuning a file system user can assign some
2655 * journal params within boundaries which depend on the ratio
2656 * blocksize/standard_blocksize.
2658 * For blocks >= standard_blocksize transaction size should
2659 * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more
2660 * then JOURNAL_TRANS_MAX_DEFAULT.
2662 * For blocks < standard_blocksize these boundaries should be
2663 * decreased proportionally.
2665 #define REISERFS_STANDARD_BLKSIZE (4096)
2667 static int check_advise_trans_params(struct super_block
*sb
,
2668 struct reiserfs_journal
*journal
)
2670 if (journal
->j_trans_max
) {
2671 /* Non-default journal params. Do sanity check for them. */
2673 if (sb
->s_blocksize
< REISERFS_STANDARD_BLKSIZE
)
2674 ratio
= REISERFS_STANDARD_BLKSIZE
/ sb
->s_blocksize
;
2676 if (journal
->j_trans_max
> JOURNAL_TRANS_MAX_DEFAULT
/ ratio
||
2677 journal
->j_trans_max
< JOURNAL_TRANS_MIN_DEFAULT
/ ratio
||
2678 SB_ONDISK_JOURNAL_SIZE(sb
) / journal
->j_trans_max
<
2679 JOURNAL_MIN_RATIO
) {
2680 reiserfs_warning(sb
, "sh-462",
2681 "bad transaction max size (%u). "
2682 "FSCK?", journal
->j_trans_max
);
2685 if (journal
->j_max_batch
!= (journal
->j_trans_max
) *
2686 JOURNAL_MAX_BATCH_DEFAULT
/JOURNAL_TRANS_MAX_DEFAULT
) {
2687 reiserfs_warning(sb
, "sh-463",
2688 "bad transaction max batch (%u). "
2689 "FSCK?", journal
->j_max_batch
);
2694 * Default journal params.
2695 * The file system was created by old version
2696 * of mkreiserfs, so some fields contain zeros,
2697 * and we need to advise proper values for them
2699 if (sb
->s_blocksize
!= REISERFS_STANDARD_BLKSIZE
) {
2700 reiserfs_warning(sb
, "sh-464", "bad blocksize (%u)",
2704 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
;
2705 journal
->j_max_batch
= JOURNAL_MAX_BATCH_DEFAULT
;
2706 journal
->j_max_commit_age
= JOURNAL_MAX_COMMIT_AGE
;
2711 /* must be called once on fs mount. calls journal_read for you */
2712 int journal_init(struct super_block
*sb
, const char *j_dev_name
,
2713 int old_format
, unsigned int commit_max_age
)
2715 int num_cnodes
= SB_ONDISK_JOURNAL_SIZE(sb
) * 2;
2716 struct buffer_head
*bhjh
;
2717 struct reiserfs_super_block
*rs
;
2718 struct reiserfs_journal_header
*jh
;
2719 struct reiserfs_journal
*journal
;
2720 struct reiserfs_journal_list
*jl
;
2721 char b
[BDEVNAME_SIZE
];
2724 journal
= SB_JOURNAL(sb
) = vzalloc(sizeof(struct reiserfs_journal
));
2726 reiserfs_warning(sb
, "journal-1256",
2727 "unable to get memory for journal structure");
2730 INIT_LIST_HEAD(&journal
->j_bitmap_nodes
);
2731 INIT_LIST_HEAD(&journal
->j_prealloc_list
);
2732 INIT_LIST_HEAD(&journal
->j_working_list
);
2733 INIT_LIST_HEAD(&journal
->j_journal_list
);
2734 journal
->j_persistent_trans
= 0;
2735 if (reiserfs_allocate_list_bitmaps(sb
, journal
->j_list_bitmap
,
2736 reiserfs_bmap_count(sb
)))
2737 goto free_and_return
;
2739 allocate_bitmap_nodes(sb
);
2741 /* reserved for journal area support */
2742 SB_JOURNAL_1st_RESERVED_BLOCK(sb
) = (old_format
?
2743 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2745 reiserfs_bmap_count(sb
) +
2747 REISERFS_DISK_OFFSET_IN_BYTES
/
2748 sb
->s_blocksize
+ 2);
2751 * Sanity check to see is the standard journal fitting
2752 * within first bitmap (actual for small blocksizes)
2754 if (!SB_ONDISK_JOURNAL_DEVICE(sb
) &&
2755 (SB_JOURNAL_1st_RESERVED_BLOCK(sb
) +
2756 SB_ONDISK_JOURNAL_SIZE(sb
) > sb
->s_blocksize
* 8)) {
2757 reiserfs_warning(sb
, "journal-1393",
2758 "journal does not fit for area addressed "
2759 "by first of bitmap blocks. It starts at "
2760 "%u and its size is %u. Block size %ld",
2761 SB_JOURNAL_1st_RESERVED_BLOCK(sb
),
2762 SB_ONDISK_JOURNAL_SIZE(sb
),
2764 goto free_and_return
;
2767 if (journal_init_dev(sb
, journal
, j_dev_name
) != 0) {
2768 reiserfs_warning(sb
, "sh-462",
2769 "unable to initialize jornal device");
2770 goto free_and_return
;
2773 rs
= SB_DISK_SUPER_BLOCK(sb
);
2775 /* read journal header */
2776 bhjh
= journal_bread(sb
,
2777 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
2778 SB_ONDISK_JOURNAL_SIZE(sb
));
2780 reiserfs_warning(sb
, "sh-459",
2781 "unable to read journal header");
2782 goto free_and_return
;
2784 jh
= (struct reiserfs_journal_header
*)(bhjh
->b_data
);
2786 /* make sure that journal matches to the super block */
2787 if (is_reiserfs_jr(rs
)
2788 && (le32_to_cpu(jh
->jh_journal
.jp_journal_magic
) !=
2789 sb_jp_journal_magic(rs
))) {
2790 reiserfs_warning(sb
, "sh-460",
2791 "journal header magic %x (device %s) does "
2792 "not match to magic found in super block %x",
2793 jh
->jh_journal
.jp_journal_magic
,
2794 bdevname(journal
->j_dev_bd
, b
),
2795 sb_jp_journal_magic(rs
));
2797 goto free_and_return
;
2800 journal
->j_trans_max
= le32_to_cpu(jh
->jh_journal
.jp_journal_trans_max
);
2801 journal
->j_max_batch
= le32_to_cpu(jh
->jh_journal
.jp_journal_max_batch
);
2802 journal
->j_max_commit_age
=
2803 le32_to_cpu(jh
->jh_journal
.jp_journal_max_commit_age
);
2804 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
2806 if (check_advise_trans_params(sb
, journal
) != 0)
2807 goto free_and_return
;
2808 journal
->j_default_max_commit_age
= journal
->j_max_commit_age
;
2810 if (commit_max_age
!= 0) {
2811 journal
->j_max_commit_age
= commit_max_age
;
2812 journal
->j_max_trans_age
= commit_max_age
;
2815 reiserfs_info(sb
, "journal params: device %s, size %u, "
2816 "journal first block %u, max trans len %u, max batch %u, "
2817 "max commit age %u, max trans age %u\n",
2818 bdevname(journal
->j_dev_bd
, b
),
2819 SB_ONDISK_JOURNAL_SIZE(sb
),
2820 SB_ONDISK_JOURNAL_1st_BLOCK(sb
),
2821 journal
->j_trans_max
,
2822 journal
->j_max_batch
,
2823 journal
->j_max_commit_age
, journal
->j_max_trans_age
);
2827 journal
->j_list_bitmap_index
= 0;
2828 journal_list_init(sb
);
2830 memset(journal
->j_list_hash_table
, 0,
2831 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
2833 INIT_LIST_HEAD(&journal
->j_dirty_buffers
);
2834 spin_lock_init(&journal
->j_dirty_buffers_lock
);
2836 journal
->j_start
= 0;
2838 journal
->j_len_alloc
= 0;
2839 atomic_set(&journal
->j_wcount
, 0);
2840 atomic_set(&journal
->j_async_throttle
, 0);
2841 journal
->j_bcount
= 0;
2842 journal
->j_trans_start_time
= 0;
2843 journal
->j_last
= NULL
;
2844 journal
->j_first
= NULL
;
2845 init_waitqueue_head(&journal
->j_join_wait
);
2846 mutex_init(&journal
->j_mutex
);
2847 mutex_init(&journal
->j_flush_mutex
);
2849 journal
->j_trans_id
= 10;
2850 journal
->j_mount_id
= 10;
2851 journal
->j_state
= 0;
2852 atomic_set(&journal
->j_jlock
, 0);
2853 journal
->j_cnode_free_list
= allocate_cnodes(num_cnodes
);
2854 journal
->j_cnode_free_orig
= journal
->j_cnode_free_list
;
2855 journal
->j_cnode_free
= journal
->j_cnode_free_list
? num_cnodes
: 0;
2856 journal
->j_cnode_used
= 0;
2857 journal
->j_must_wait
= 0;
2859 if (journal
->j_cnode_free
== 0) {
2860 reiserfs_warning(sb
, "journal-2004", "Journal cnode memory "
2861 "allocation failed (%ld bytes). Journal is "
2862 "too large for available memory. Usually "
2863 "this is due to a journal that is too large.",
2864 sizeof (struct reiserfs_journal_cnode
) * num_cnodes
);
2865 goto free_and_return
;
2868 init_journal_hash(sb
);
2869 jl
= journal
->j_current_jl
;
2872 * get_list_bitmap() may call flush_commit_list() which
2873 * requires the lock. Calling flush_commit_list() shouldn't happen
2874 * this early but I like to be paranoid.
2876 reiserfs_write_lock(sb
);
2877 jl
->j_list_bitmap
= get_list_bitmap(sb
, jl
);
2878 reiserfs_write_unlock(sb
);
2879 if (!jl
->j_list_bitmap
) {
2880 reiserfs_warning(sb
, "journal-2005",
2881 "get_list_bitmap failed for journal list 0");
2882 goto free_and_return
;
2885 ret
= journal_read(sb
);
2887 reiserfs_warning(sb
, "reiserfs-2006",
2888 "Replay Failure, unable to mount");
2889 goto free_and_return
;
2892 INIT_DELAYED_WORK(&journal
->j_work
, flush_async_commits
);
2893 journal
->j_work_sb
= sb
;
2896 free_journal_ram(sb
);
2901 * test for a polite end of the current transaction. Used by file_write,
2902 * and should be used by delete to make sure they don't write more than
2903 * can fit inside a single transaction
2905 int journal_transaction_should_end(struct reiserfs_transaction_handle
*th
,
2908 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2909 time_t now
= get_seconds();
2910 /* cannot restart while nested */
2911 BUG_ON(!th
->t_trans_id
);
2912 if (th
->t_refcount
> 1)
2914 if (journal
->j_must_wait
> 0 ||
2915 (journal
->j_len_alloc
+ new_alloc
) >= journal
->j_max_batch
||
2916 atomic_read(&journal
->j_jlock
) ||
2917 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
||
2918 journal
->j_cnode_free
< (journal
->j_trans_max
* 3)) {
2922 journal
->j_len_alloc
+= new_alloc
;
2923 th
->t_blocks_allocated
+= new_alloc
;
2927 /* this must be called inside a transaction */
2928 void reiserfs_block_writes(struct reiserfs_transaction_handle
*th
)
2930 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2931 BUG_ON(!th
->t_trans_id
);
2932 journal
->j_must_wait
= 1;
2933 set_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2937 /* this must be called without a transaction started */
2938 void reiserfs_allow_writes(struct super_block
*s
)
2940 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2941 clear_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2942 wake_up(&journal
->j_join_wait
);
2945 /* this must be called without a transaction started */
2946 void reiserfs_wait_on_write_block(struct super_block
*s
)
2948 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2949 wait_event(journal
->j_join_wait
,
2950 !test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
));
2953 static void queue_log_writer(struct super_block
*s
)
2956 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2957 set_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
2960 * we don't want to use wait_event here because
2961 * we only want to wait once.
2963 init_waitqueue_entry(&wait
, current
);
2964 add_wait_queue(&journal
->j_join_wait
, &wait
);
2965 set_current_state(TASK_UNINTERRUPTIBLE
);
2966 if (test_bit(J_WRITERS_QUEUED
, &journal
->j_state
)) {
2967 int depth
= reiserfs_write_unlock_nested(s
);
2969 reiserfs_write_lock_nested(s
, depth
);
2971 __set_current_state(TASK_RUNNING
);
2972 remove_wait_queue(&journal
->j_join_wait
, &wait
);
2975 static void wake_queued_writers(struct super_block
*s
)
2977 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2978 if (test_and_clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2979 wake_up(&journal
->j_join_wait
);
2982 static void let_transaction_grow(struct super_block
*sb
, unsigned int trans_id
)
2984 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2985 unsigned long bcount
= journal
->j_bcount
;
2989 depth
= reiserfs_write_unlock_nested(sb
);
2990 schedule_timeout_uninterruptible(1);
2991 reiserfs_write_lock_nested(sb
, depth
);
2993 journal
->j_current_jl
->j_state
|= LIST_COMMIT_PENDING
;
2994 while ((atomic_read(&journal
->j_wcount
) > 0 ||
2995 atomic_read(&journal
->j_jlock
)) &&
2996 journal
->j_trans_id
== trans_id
) {
2997 queue_log_writer(sb
);
2999 if (journal
->j_trans_id
!= trans_id
)
3001 if (bcount
== journal
->j_bcount
)
3003 bcount
= journal
->j_bcount
;
3008 * join == true if you must join an existing transaction.
3009 * join == false if you can deal with waiting for others to finish
3011 * this will block until the transaction is joinable. send the number of
3012 * blocks you expect to use in nblocks.
3014 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
3015 struct super_block
*sb
, unsigned long nblocks
,
3018 time_t now
= get_seconds();
3019 unsigned int old_trans_id
;
3020 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3021 struct reiserfs_transaction_handle myth
;
3022 int sched_count
= 0;
3026 reiserfs_check_lock_depth(sb
, "journal_begin");
3027 BUG_ON(nblocks
> journal
->j_trans_max
);
3029 PROC_INFO_INC(sb
, journal
.journal_being
);
3030 /* set here for journal_join */
3036 if (join
!= JBEGIN_ABORT
&& reiserfs_is_journal_aborted(journal
)) {
3038 retval
= journal
->j_errno
;
3041 journal
->j_bcount
++;
3043 if (test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) {
3045 depth
= reiserfs_write_unlock_nested(sb
);
3046 reiserfs_wait_on_write_block(sb
);
3047 reiserfs_write_lock_nested(sb
, depth
);
3048 PROC_INFO_INC(sb
, journal
.journal_relock_writers
);
3051 now
= get_seconds();
3054 * if there is no room in the journal OR
3055 * if this transaction is too old, and we weren't called joinable,
3056 * wait for it to finish before beginning we don't sleep if there
3057 * aren't other writers
3060 if ((!join
&& journal
->j_must_wait
> 0) ||
3062 && (journal
->j_len_alloc
+ nblocks
+ 2) >= journal
->j_max_batch
)
3063 || (!join
&& atomic_read(&journal
->j_wcount
) > 0
3064 && journal
->j_trans_start_time
> 0
3065 && (now
- journal
->j_trans_start_time
) >
3066 journal
->j_max_trans_age
) || (!join
3067 && atomic_read(&journal
->j_jlock
))
3068 || (!join
&& journal
->j_cnode_free
< (journal
->j_trans_max
* 3))) {
3070 old_trans_id
= journal
->j_trans_id
;
3071 /* allow others to finish this transaction */
3074 if (!join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >=
3075 journal
->j_max_batch
&&
3076 ((journal
->j_len
+ nblocks
+ 2) * 100) <
3077 (journal
->j_len_alloc
* 75)) {
3078 if (atomic_read(&journal
->j_wcount
) > 10) {
3080 queue_log_writer(sb
);
3085 * don't mess with joining the transaction if all we
3086 * have to do is wait for someone else to do a commit
3088 if (atomic_read(&journal
->j_jlock
)) {
3089 while (journal
->j_trans_id
== old_trans_id
&&
3090 atomic_read(&journal
->j_jlock
)) {
3091 queue_log_writer(sb
);
3095 retval
= journal_join(&myth
, sb
);
3099 /* someone might have ended the transaction while we joined */
3100 if (old_trans_id
!= journal
->j_trans_id
) {
3101 retval
= do_journal_end(&myth
, 0);
3103 retval
= do_journal_end(&myth
, COMMIT_NOW
);
3109 PROC_INFO_INC(sb
, journal
.journal_relock_wcount
);
3112 /* we are the first writer, set trans_id */
3113 if (journal
->j_trans_start_time
== 0) {
3114 journal
->j_trans_start_time
= get_seconds();
3116 atomic_inc(&journal
->j_wcount
);
3117 journal
->j_len_alloc
+= nblocks
;
3118 th
->t_blocks_logged
= 0;
3119 th
->t_blocks_allocated
= nblocks
;
3120 th
->t_trans_id
= journal
->j_trans_id
;
3122 INIT_LIST_HEAD(&th
->t_list
);
3126 memset(th
, 0, sizeof(*th
));
3128 * Re-set th->t_super, so we can properly keep track of how many
3129 * persistent transactions there are. We need to do this so if this
3130 * call is part of a failed restart_transaction, we can free it later
3136 struct reiserfs_transaction_handle
*reiserfs_persistent_transaction(struct
3142 struct reiserfs_transaction_handle
*th
;
3145 * if we're nesting into an existing transaction. It will be
3146 * persistent on its own
3148 if (reiserfs_transaction_running(s
)) {
3149 th
= current
->journal_info
;
3151 BUG_ON(th
->t_refcount
< 2);
3155 th
= kmalloc(sizeof(struct reiserfs_transaction_handle
), GFP_NOFS
);
3158 ret
= journal_begin(th
, s
, nblocks
);
3164 SB_JOURNAL(s
)->j_persistent_trans
++;
3168 int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle
*th
)
3170 struct super_block
*s
= th
->t_super
;
3173 ret
= journal_end(th
);
3176 if (th
->t_refcount
== 0) {
3177 SB_JOURNAL(s
)->j_persistent_trans
--;
3183 static int journal_join(struct reiserfs_transaction_handle
*th
,
3184 struct super_block
*sb
)
3186 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3189 * this keeps do_journal_end from NULLing out the
3190 * current->journal_info pointer
3192 th
->t_handle_save
= cur_th
;
3193 BUG_ON(cur_th
&& cur_th
->t_refcount
> 1);
3194 return do_journal_begin_r(th
, sb
, 1, JBEGIN_JOIN
);
3197 int journal_join_abort(struct reiserfs_transaction_handle
*th
,
3198 struct super_block
*sb
)
3200 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3203 * this keeps do_journal_end from NULLing out the
3204 * current->journal_info pointer
3206 th
->t_handle_save
= cur_th
;
3207 BUG_ON(cur_th
&& cur_th
->t_refcount
> 1);
3208 return do_journal_begin_r(th
, sb
, 1, JBEGIN_ABORT
);
3211 int journal_begin(struct reiserfs_transaction_handle
*th
,
3212 struct super_block
*sb
, unsigned long nblocks
)
3214 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3217 th
->t_handle_save
= NULL
;
3219 /* we are nesting into the current transaction */
3220 if (cur_th
->t_super
== sb
) {
3221 BUG_ON(!cur_th
->t_refcount
);
3222 cur_th
->t_refcount
++;
3223 memcpy(th
, cur_th
, sizeof(*th
));
3224 if (th
->t_refcount
<= 1)
3225 reiserfs_warning(sb
, "reiserfs-2005",
3226 "BAD: refcount <= 1, but "
3227 "journal_info != 0");
3231 * we've ended up with a handle from a different
3232 * filesystem. save it and restore on journal_end.
3233 * This should never really happen...
3235 reiserfs_warning(sb
, "clm-2100",
3236 "nesting info a different FS");
3237 th
->t_handle_save
= current
->journal_info
;
3238 current
->journal_info
= th
;
3241 current
->journal_info
= th
;
3243 ret
= do_journal_begin_r(th
, sb
, nblocks
, JBEGIN_REG
);
3244 BUG_ON(current
->journal_info
!= th
);
3247 * I guess this boils down to being the reciprocal of clm-2100 above.
3248 * If do_journal_begin_r fails, we need to put it back, since
3249 * journal_end won't be called to do it. */
3251 current
->journal_info
= th
->t_handle_save
;
3253 BUG_ON(!th
->t_refcount
);
3259 * puts bh into the current transaction. If it was already there, reorders
3260 * removes the old pointers from the hash, and puts new ones in (to make
3261 * sure replay happen in the right order).
3263 * if it was dirty, cleans and files onto the clean list. I can't let it
3264 * be dirty again until the transaction is committed.
3266 * if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
3268 int journal_mark_dirty(struct reiserfs_transaction_handle
*th
,
3269 struct buffer_head
*bh
)
3271 struct super_block
*sb
= th
->t_super
;
3272 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3273 struct reiserfs_journal_cnode
*cn
= NULL
;
3274 int count_already_incd
= 0;
3276 BUG_ON(!th
->t_trans_id
);
3278 PROC_INFO_INC(sb
, journal
.mark_dirty
);
3279 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3280 reiserfs_panic(th
->t_super
, "journal-1577",
3281 "handle trans id %ld != current trans id %ld",
3282 th
->t_trans_id
, journal
->j_trans_id
);
3285 prepared
= test_clear_buffer_journal_prepared(bh
);
3286 clear_buffer_journal_restore_dirty(bh
);
3287 /* already in this transaction, we are done */
3288 if (buffer_journaled(bh
)) {
3289 PROC_INFO_INC(sb
, journal
.mark_dirty_already
);
3294 * this must be turned into a panic instead of a warning. We can't
3295 * allow a dirty or journal_dirty or locked buffer to be logged, as
3296 * some changes could get to disk too early. NOT GOOD.
3298 if (!prepared
|| buffer_dirty(bh
)) {
3299 reiserfs_warning(sb
, "journal-1777",
3300 "buffer %llu bad state "
3301 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3302 (unsigned long long)bh
->b_blocknr
,
3303 prepared
? ' ' : '!',
3304 buffer_locked(bh
) ? ' ' : '!',
3305 buffer_dirty(bh
) ? ' ' : '!',
3306 buffer_journal_dirty(bh
) ? ' ' : '!');
3309 if (atomic_read(&journal
->j_wcount
) <= 0) {
3310 reiserfs_warning(sb
, "journal-1409",
3311 "returning because j_wcount was %d",
3312 atomic_read(&journal
->j_wcount
));
3316 * this error means I've screwed up, and we've overflowed
3317 * the transaction. Nothing can be done here, except make the
3318 * FS readonly or panic.
3320 if (journal
->j_len
>= journal
->j_trans_max
) {
3321 reiserfs_panic(th
->t_super
, "journal-1413",
3322 "j_len (%lu) is too big",
3326 if (buffer_journal_dirty(bh
)) {
3327 count_already_incd
= 1;
3328 PROC_INFO_INC(sb
, journal
.mark_dirty_notjournal
);
3329 clear_buffer_journal_dirty(bh
);
3332 if (journal
->j_len
> journal
->j_len_alloc
) {
3333 journal
->j_len_alloc
= journal
->j_len
+ JOURNAL_PER_BALANCE_CNT
;
3336 set_buffer_journaled(bh
);
3338 /* now put this guy on the end */
3342 reiserfs_panic(sb
, "journal-4", "get_cnode failed!");
3345 if (th
->t_blocks_logged
== th
->t_blocks_allocated
) {
3346 th
->t_blocks_allocated
+= JOURNAL_PER_BALANCE_CNT
;
3347 journal
->j_len_alloc
+= JOURNAL_PER_BALANCE_CNT
;
3349 th
->t_blocks_logged
++;
3353 cn
->blocknr
= bh
->b_blocknr
;
3356 insert_journal_hash(journal
->j_hash_table
, cn
);
3357 if (!count_already_incd
) {
3362 cn
->prev
= journal
->j_last
;
3364 if (journal
->j_last
) {
3365 journal
->j_last
->next
= cn
;
3366 journal
->j_last
= cn
;
3368 journal
->j_first
= cn
;
3369 journal
->j_last
= cn
;
3371 reiserfs_schedule_old_flush(sb
);
3375 int journal_end(struct reiserfs_transaction_handle
*th
)
3377 struct super_block
*sb
= th
->t_super
;
3378 if (!current
->journal_info
&& th
->t_refcount
> 1)
3379 reiserfs_warning(sb
, "REISER-NESTING",
3380 "th NULL, refcount %d", th
->t_refcount
);
3382 if (!th
->t_trans_id
) {
3388 if (th
->t_refcount
> 0) {
3389 struct reiserfs_transaction_handle
*cur_th
=
3390 current
->journal_info
;
3393 * we aren't allowed to close a nested transaction on a
3394 * different filesystem from the one in the task struct
3396 BUG_ON(cur_th
->t_super
!= th
->t_super
);
3399 memcpy(current
->journal_info
, th
, sizeof(*th
));
3404 return do_journal_end(th
, 0);
3409 * removes from the current transaction, relsing and descrementing any counters.
3410 * also files the removed buffer directly onto the clean list
3412 * called by journal_mark_freed when a block has been deleted
3414 * returns 1 if it cleaned and relsed the buffer. 0 otherwise
3416 static int remove_from_transaction(struct super_block
*sb
,
3417 b_blocknr_t blocknr
, int already_cleaned
)
3419 struct buffer_head
*bh
;
3420 struct reiserfs_journal_cnode
*cn
;
3421 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3424 cn
= get_journal_hash_dev(sb
, journal
->j_hash_table
, blocknr
);
3425 if (!cn
|| !cn
->bh
) {
3430 cn
->prev
->next
= cn
->next
;
3433 cn
->next
->prev
= cn
->prev
;
3435 if (cn
== journal
->j_first
) {
3436 journal
->j_first
= cn
->next
;
3438 if (cn
== journal
->j_last
) {
3439 journal
->j_last
= cn
->prev
;
3442 remove_journal_hash(sb
, journal
->j_hash_table
, NULL
,
3444 clear_buffer_journaled(bh
); /* don't log this one */
3446 if (!already_cleaned
) {
3447 clear_buffer_journal_dirty(bh
);
3448 clear_buffer_dirty(bh
);
3449 clear_buffer_journal_test(bh
);
3451 if (atomic_read(&bh
->b_count
) < 0) {
3452 reiserfs_warning(sb
, "journal-1752",
3458 journal
->j_len_alloc
--;
3464 * for any cnode in a journal list, it can only be dirtied of all the
3465 * transactions that include it are committed to disk.
3466 * this checks through each transaction, and returns 1 if you are allowed
3467 * to dirty, and 0 if you aren't
3469 * it is called by dirty_journal_list, which is called after
3470 * flush_commit_list has gotten all the log blocks for a given
3471 * transaction on disk
3474 static int can_dirty(struct reiserfs_journal_cnode
*cn
)
3476 struct super_block
*sb
= cn
->sb
;
3477 b_blocknr_t blocknr
= cn
->blocknr
;
3478 struct reiserfs_journal_cnode
*cur
= cn
->hprev
;
3482 * first test hprev. These are all newer than cn, so any node here
3483 * with the same block number and dev means this node can't be sent
3484 * to disk right now.
3486 while (cur
&& can_dirty
) {
3487 if (cur
->jlist
&& cur
->bh
&& cur
->blocknr
&& cur
->sb
== sb
&&
3488 cur
->blocknr
== blocknr
) {
3494 * then test hnext. These are all older than cn. As long as they
3495 * are committed to the log, it is safe to write cn to disk
3498 while (cur
&& can_dirty
) {
3499 if (cur
->jlist
&& cur
->jlist
->j_len
> 0 &&
3500 atomic_read(&cur
->jlist
->j_commit_left
) > 0 && cur
->bh
&&
3501 cur
->blocknr
&& cur
->sb
== sb
&& cur
->blocknr
== blocknr
) {
3510 * syncs the commit blocks, but does not force the real buffers to disk
3511 * will wait until the current transaction is done/committed before returning
3513 int journal_end_sync(struct reiserfs_transaction_handle
*th
)
3515 struct super_block
*sb
= th
->t_super
;
3516 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3518 BUG_ON(!th
->t_trans_id
);
3519 /* you can sync while nested, very, very bad */
3520 BUG_ON(th
->t_refcount
> 1);
3521 if (journal
->j_len
== 0) {
3522 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
3524 journal_mark_dirty(th
, SB_BUFFER_WITH_SB(sb
));
3526 return do_journal_end(th
, COMMIT_NOW
| WAIT
);
3529 /* writeback the pending async commits to disk */
3530 static void flush_async_commits(struct work_struct
*work
)
3532 struct reiserfs_journal
*journal
=
3533 container_of(work
, struct reiserfs_journal
, j_work
.work
);
3534 struct super_block
*sb
= journal
->j_work_sb
;
3535 struct reiserfs_journal_list
*jl
;
3536 struct list_head
*entry
;
3538 reiserfs_write_lock(sb
);
3539 if (!list_empty(&journal
->j_journal_list
)) {
3540 /* last entry is the youngest, commit it and you get everything */
3541 entry
= journal
->j_journal_list
.prev
;
3542 jl
= JOURNAL_LIST_ENTRY(entry
);
3543 flush_commit_list(sb
, jl
, 1);
3545 reiserfs_write_unlock(sb
);
3549 * flushes any old transactions to disk
3550 * ends the current transaction if it is too old
3552 void reiserfs_flush_old_commits(struct super_block
*sb
)
3555 struct reiserfs_transaction_handle th
;
3556 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3558 now
= get_seconds();
3560 * safety check so we don't flush while we are replaying the log during
3563 if (list_empty(&journal
->j_journal_list
))
3567 * check the current transaction. If there are no writers, and it is
3568 * too old, finish it, and force the commit blocks to disk
3570 if (atomic_read(&journal
->j_wcount
) <= 0 &&
3571 journal
->j_trans_start_time
> 0 &&
3572 journal
->j_len
> 0 &&
3573 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3574 if (!journal_join(&th
, sb
)) {
3575 reiserfs_prepare_for_journal(sb
,
3576 SB_BUFFER_WITH_SB(sb
),
3578 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(sb
));
3581 * we're only being called from kreiserfsd, it makes
3582 * no sense to do an async commit so that kreiserfsd
3585 do_journal_end(&th
, COMMIT_NOW
| WAIT
);
3591 * returns 0 if do_journal_end should return right away, returns 1 if
3592 * do_journal_end should finish the commit
3594 * if the current transaction is too old, but still has writers, this will
3595 * wait on j_join_wait until all the writers are done. By the time it
3596 * wakes up, the transaction it was called has already ended, so it just
3597 * flushes the commit list and returns 0.
3599 * Won't batch when flush or commit_now is set. Also won't batch when
3600 * others are waiting on j_join_wait.
3602 * Note, we can't allow the journal_end to proceed while there are still
3603 * writers in the log.
3605 static int check_journal_end(struct reiserfs_transaction_handle
*th
, int flags
)
3609 int flush
= flags
& FLUSH_ALL
;
3610 int commit_now
= flags
& COMMIT_NOW
;
3611 int wait_on_commit
= flags
& WAIT
;
3612 struct reiserfs_journal_list
*jl
;
3613 struct super_block
*sb
= th
->t_super
;
3614 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3616 BUG_ON(!th
->t_trans_id
);
3618 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3619 reiserfs_panic(th
->t_super
, "journal-1577",
3620 "handle trans id %ld != current trans id %ld",
3621 th
->t_trans_id
, journal
->j_trans_id
);
3624 journal
->j_len_alloc
-= (th
->t_blocks_allocated
- th
->t_blocks_logged
);
3625 /* <= 0 is allowed. unmounting might not call begin */
3626 if (atomic_read(&journal
->j_wcount
) > 0)
3627 atomic_dec(&journal
->j_wcount
);
3630 * BUG, deal with case where j_len is 0, but people previously
3631 * freed blocks need to be released will be dealt with by next
3632 * transaction that actually writes something, but should be taken
3633 * care of in this trans
3635 BUG_ON(journal
->j_len
== 0);
3638 * if wcount > 0, and we are called to with flush or commit_now,
3639 * we wait on j_join_wait. We will wake up when the last writer has
3640 * finished the transaction, and started it on its way to the disk.
3641 * Then, we flush the commit or journal list, and just return 0
3642 * because the rest of journal end was already done for this
3645 if (atomic_read(&journal
->j_wcount
) > 0) {
3646 if (flush
|| commit_now
) {
3649 jl
= journal
->j_current_jl
;
3650 trans_id
= jl
->j_trans_id
;
3652 jl
->j_state
|= LIST_COMMIT_PENDING
;
3653 atomic_set(&journal
->j_jlock
, 1);
3655 journal
->j_next_full_flush
= 1;
3660 * sleep while the current transaction is
3663 while (journal
->j_trans_id
== trans_id
) {
3664 if (atomic_read(&journal
->j_jlock
)) {
3665 queue_log_writer(sb
);
3668 if (journal
->j_trans_id
== trans_id
) {
3669 atomic_set(&journal
->j_jlock
,
3675 BUG_ON(journal
->j_trans_id
== trans_id
);
3678 && journal_list_still_alive(sb
, trans_id
)
3679 && wait_on_commit
) {
3680 flush_commit_list(sb
, jl
, 1);
3688 /* deal with old transactions where we are the last writers */
3689 now
= get_seconds();
3690 if ((now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3692 journal
->j_next_async_flush
= 1;
3694 /* don't batch when someone is waiting on j_join_wait */
3695 /* don't batch when syncing the commit or flushing the whole trans */
3696 if (!(journal
->j_must_wait
> 0) && !(atomic_read(&journal
->j_jlock
))
3697 && !flush
&& !commit_now
&& (journal
->j_len
< journal
->j_max_batch
)
3698 && journal
->j_len_alloc
< journal
->j_max_batch
3699 && journal
->j_cnode_free
> (journal
->j_trans_max
* 3)) {
3700 journal
->j_bcount
++;
3705 if (journal
->j_start
> SB_ONDISK_JOURNAL_SIZE(sb
)) {
3706 reiserfs_panic(sb
, "journal-003",
3707 "j_start (%ld) is too high",
3714 * Does all the work that makes deleting blocks safe.
3715 * when deleting a block mark BH_JNew, just remove it from the current
3716 * transaction, clean it's buffer_head and move on.
3719 * set a bit for the block in the journal bitmap. That will prevent it from
3720 * being allocated for unformatted nodes before this transaction has finished.
3722 * mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers.
3723 * That will prevent any old transactions with this block from trying to flush
3724 * to the real location. Since we aren't removing the cnode from the
3725 * journal_list_hash, *the block can't be reallocated yet.
3727 * Then remove it from the current transaction, decrementing any counters and
3728 * filing it on the clean list.
3730 int journal_mark_freed(struct reiserfs_transaction_handle
*th
,
3731 struct super_block
*sb
, b_blocknr_t blocknr
)
3733 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3734 struct reiserfs_journal_cnode
*cn
= NULL
;
3735 struct buffer_head
*bh
= NULL
;
3736 struct reiserfs_list_bitmap
*jb
= NULL
;
3738 BUG_ON(!th
->t_trans_id
);
3740 cn
= get_journal_hash_dev(sb
, journal
->j_hash_table
, blocknr
);
3745 /* if it is journal new, we just remove it from this transaction */
3746 if (bh
&& buffer_journal_new(bh
)) {
3747 clear_buffer_journal_new(bh
);
3748 clear_prepared_bits(bh
);
3749 reiserfs_clean_and_file_buffer(bh
);
3750 cleaned
= remove_from_transaction(sb
, blocknr
, cleaned
);
3753 * set the bit for this block in the journal bitmap
3754 * for this transaction
3756 jb
= journal
->j_current_jl
->j_list_bitmap
;
3758 reiserfs_panic(sb
, "journal-1702",
3759 "journal_list_bitmap is NULL");
3761 set_bit_in_list_bitmap(sb
, blocknr
, jb
);
3763 /* Note, the entire while loop is not allowed to schedule. */
3766 clear_prepared_bits(bh
);
3767 reiserfs_clean_and_file_buffer(bh
);
3769 cleaned
= remove_from_transaction(sb
, blocknr
, cleaned
);
3772 * find all older transactions with this block,
3773 * make sure they don't try to write it out
3775 cn
= get_journal_hash_dev(sb
, journal
->j_list_hash_table
,
3778 if (sb
== cn
->sb
&& blocknr
== cn
->blocknr
) {
3779 set_bit(BLOCK_FREED
, &cn
->state
);
3782 * remove_from_transaction will brelse
3783 * the buffer if it was in the current
3787 clear_buffer_journal_dirty(cn
->
3789 clear_buffer_dirty(cn
->bh
);
3790 clear_buffer_journal_test(cn
->
3795 (&cn
->bh
->b_count
) < 0) {
3796 reiserfs_warning(sb
,
3798 "cn->bh->b_count < 0");
3802 * since we are clearing the bh,
3803 * we MUST dec nonzerolen
3806 atomic_dec(&cn
->jlist
->
3817 release_buffer_page(bh
); /* get_hash grabs the buffer */
3821 void reiserfs_update_inode_transaction(struct inode
*inode
)
3823 struct reiserfs_journal
*journal
= SB_JOURNAL(inode
->i_sb
);
3824 REISERFS_I(inode
)->i_jl
= journal
->j_current_jl
;
3825 REISERFS_I(inode
)->i_trans_id
= journal
->j_trans_id
;
3829 * returns -1 on error, 0 if no commits/barriers were done and 1
3830 * if a transaction was actually committed and the barrier was done
3832 static int __commit_trans_jl(struct inode
*inode
, unsigned long id
,
3833 struct reiserfs_journal_list
*jl
)
3835 struct reiserfs_transaction_handle th
;
3836 struct super_block
*sb
= inode
->i_sb
;
3837 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3841 * is it from the current transaction,
3842 * or from an unknown transaction?
3844 if (id
== journal
->j_trans_id
) {
3845 jl
= journal
->j_current_jl
;
3847 * try to let other writers come in and
3848 * grow this transaction
3850 let_transaction_grow(sb
, id
);
3851 if (journal
->j_trans_id
!= id
) {
3852 goto flush_commit_only
;
3855 ret
= journal_begin(&th
, sb
, 1);
3859 /* someone might have ended this transaction while we joined */
3860 if (journal
->j_trans_id
!= id
) {
3861 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
3863 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(sb
));
3864 ret
= journal_end(&th
);
3865 goto flush_commit_only
;
3868 ret
= journal_end_sync(&th
);
3874 * this gets tricky, we have to make sure the journal list in
3875 * the inode still exists. We know the list is still around
3876 * if we've got a larger transaction id than the oldest list
3879 if (journal_list_still_alive(inode
->i_sb
, id
)) {
3881 * we only set ret to 1 when we know for sure
3882 * the barrier hasn't been started yet on the commit
3885 if (atomic_read(&jl
->j_commit_left
) > 1)
3887 flush_commit_list(sb
, jl
, 1);
3888 if (journal
->j_errno
)
3889 ret
= journal
->j_errno
;
3892 /* otherwise the list is gone, and long since committed */
3896 int reiserfs_commit_for_inode(struct inode
*inode
)
3898 unsigned int id
= REISERFS_I(inode
)->i_trans_id
;
3899 struct reiserfs_journal_list
*jl
= REISERFS_I(inode
)->i_jl
;
3902 * for the whole inode, assume unset id means it was
3903 * changed in the current transaction. More conservative
3906 reiserfs_update_inode_transaction(inode
);
3907 id
= REISERFS_I(inode
)->i_trans_id
;
3908 /* jl will be updated in __commit_trans_jl */
3911 return __commit_trans_jl(inode
, id
, jl
);
3914 void reiserfs_restore_prepared_buffer(struct super_block
*sb
,
3915 struct buffer_head
*bh
)
3917 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3918 PROC_INFO_INC(sb
, journal
.restore_prepared
);
3922 if (test_clear_buffer_journal_restore_dirty(bh
) &&
3923 buffer_journal_dirty(bh
)) {
3924 struct reiserfs_journal_cnode
*cn
;
3925 reiserfs_write_lock(sb
);
3926 cn
= get_journal_hash_dev(sb
,
3927 journal
->j_list_hash_table
,
3929 if (cn
&& can_dirty(cn
)) {
3930 set_buffer_journal_test(bh
);
3931 mark_buffer_dirty(bh
);
3933 reiserfs_write_unlock(sb
);
3935 clear_buffer_journal_prepared(bh
);
3938 extern struct tree_balance
*cur_tb
;
3940 * before we can change a metadata block, we have to make sure it won't
3941 * be written to disk while we are altering it. So, we must:
3945 int reiserfs_prepare_for_journal(struct super_block
*sb
,
3946 struct buffer_head
*bh
, int wait
)
3948 PROC_INFO_INC(sb
, journal
.prepare
);
3950 if (!trylock_buffer(bh
)) {
3955 set_buffer_journal_prepared(bh
);
3956 if (test_clear_buffer_dirty(bh
) && buffer_journal_dirty(bh
)) {
3957 clear_buffer_journal_test(bh
);
3958 set_buffer_journal_restore_dirty(bh
);
3965 * long and ugly. If flush, will not return until all commit
3966 * blocks and all real buffers in the trans are on disk.
3967 * If no_async, won't return until all commit blocks are on disk.
3969 * keep reading, there are comments as you go along
3971 * If the journal is aborted, we just clean up. Things like flushing
3972 * journal lists, etc just won't happen.
3974 static int do_journal_end(struct reiserfs_transaction_handle
*th
, int flags
)
3976 struct super_block
*sb
= th
->t_super
;
3977 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3978 struct reiserfs_journal_cnode
*cn
, *next
, *jl_cn
;
3979 struct reiserfs_journal_cnode
*last_cn
= NULL
;
3980 struct reiserfs_journal_desc
*desc
;
3981 struct reiserfs_journal_commit
*commit
;
3982 struct buffer_head
*c_bh
; /* commit bh */
3983 struct buffer_head
*d_bh
; /* desc bh */
3984 int cur_write_start
= 0; /* start index of current log write */
3989 struct reiserfs_journal_list
*jl
, *temp_jl
;
3990 struct list_head
*entry
, *safe
;
3991 unsigned long jindex
;
3992 unsigned int commit_trans_id
;
3996 BUG_ON(th
->t_refcount
> 1);
3997 BUG_ON(!th
->t_trans_id
);
3998 BUG_ON(!th
->t_super
);
4001 * protect flush_older_commits from doing mistakes if the
4002 * transaction ID counter gets overflowed.
4004 if (th
->t_trans_id
== ~0U)
4005 flags
|= FLUSH_ALL
| COMMIT_NOW
| WAIT
;
4006 flush
= flags
& FLUSH_ALL
;
4007 wait_on_commit
= flags
& WAIT
;
4009 current
->journal_info
= th
->t_handle_save
;
4010 reiserfs_check_lock_depth(sb
, "journal end");
4011 if (journal
->j_len
== 0) {
4012 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
4014 journal_mark_dirty(th
, SB_BUFFER_WITH_SB(sb
));
4018 if (journal
->j_next_full_flush
) {
4022 if (journal
->j_next_async_flush
) {
4023 flags
|= COMMIT_NOW
| WAIT
;
4028 * check_journal_end locks the journal, and unlocks if it does
4029 * not return 1 it tells us if we should continue with the
4030 * journal_end, or just return
4032 if (!check_journal_end(th
, flags
)) {
4033 reiserfs_schedule_old_flush(sb
);
4034 wake_queued_writers(sb
);
4035 reiserfs_async_progress_wait(sb
);
4039 /* check_journal_end might set these, check again */
4040 if (journal
->j_next_full_flush
) {
4045 * j must wait means we have to flush the log blocks, and the
4046 * real blocks for this transaction
4048 if (journal
->j_must_wait
> 0) {
4051 #ifdef REISERFS_PREALLOCATE
4053 * quota ops might need to nest, setup the journal_info pointer
4054 * for them and raise the refcount so that it is > 0.
4056 current
->journal_info
= th
;
4059 /* it should not involve new blocks into the transaction */
4060 reiserfs_discard_all_prealloc(th
);
4063 current
->journal_info
= th
->t_handle_save
;
4066 /* setup description block */
4069 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
4071 set_buffer_uptodate(d_bh
);
4072 desc
= (struct reiserfs_journal_desc
*)(d_bh
)->b_data
;
4073 memset(d_bh
->b_data
, 0, d_bh
->b_size
);
4074 memcpy(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8);
4075 set_desc_trans_id(desc
, journal
->j_trans_id
);
4078 * setup commit block. Don't write (keep it clean too) this one
4079 * until after everyone else is written
4081 c_bh
= journal_getblk(sb
, SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
4082 ((journal
->j_start
+ journal
->j_len
+
4083 1) % SB_ONDISK_JOURNAL_SIZE(sb
)));
4084 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
4085 memset(c_bh
->b_data
, 0, c_bh
->b_size
);
4086 set_commit_trans_id(commit
, journal
->j_trans_id
);
4087 set_buffer_uptodate(c_bh
);
4089 /* init this journal list */
4090 jl
= journal
->j_current_jl
;
4093 * we lock the commit before doing anything because
4094 * we want to make sure nobody tries to run flush_commit_list until
4095 * the new transaction is fully setup, and we've already flushed the
4098 reiserfs_mutex_lock_safe(&jl
->j_commit_mutex
, sb
);
4100 /* save the transaction id in case we need to commit it later */
4101 commit_trans_id
= jl
->j_trans_id
;
4103 atomic_set(&jl
->j_older_commits_done
, 0);
4104 jl
->j_trans_id
= journal
->j_trans_id
;
4105 jl
->j_timestamp
= journal
->j_trans_start_time
;
4106 jl
->j_commit_bh
= c_bh
;
4107 jl
->j_start
= journal
->j_start
;
4108 jl
->j_len
= journal
->j_len
;
4109 atomic_set(&jl
->j_nonzerolen
, journal
->j_len
);
4110 atomic_set(&jl
->j_commit_left
, journal
->j_len
+ 2);
4111 jl
->j_realblock
= NULL
;
4114 * The ENTIRE FOR LOOP MUST not cause schedule to occur.
4115 * for each real block, add it to the journal list hash,
4116 * copy into real block index array in the commit or desc block
4118 trans_half
= journal_trans_half(sb
->s_blocksize
);
4119 for (i
= 0, cn
= journal
->j_first
; cn
; cn
= cn
->next
, i
++) {
4120 if (buffer_journaled(cn
->bh
)) {
4121 jl_cn
= get_cnode(sb
);
4123 reiserfs_panic(sb
, "journal-1676",
4124 "get_cnode returned NULL");
4127 jl
->j_realblock
= jl_cn
;
4129 jl_cn
->prev
= last_cn
;
4132 last_cn
->next
= jl_cn
;
4136 * make sure the block we are trying to log
4137 * is not a block of journal or reserved area
4139 if (is_block_in_log_or_reserved_area
4140 (sb
, cn
->bh
->b_blocknr
)) {
4141 reiserfs_panic(sb
, "journal-2332",
4142 "Trying to log block %lu, "
4143 "which is a log block",
4146 jl_cn
->blocknr
= cn
->bh
->b_blocknr
;
4151 insert_journal_hash(journal
->j_list_hash_table
, jl_cn
);
4152 if (i
< trans_half
) {
4153 desc
->j_realblock
[i
] =
4154 cpu_to_le32(cn
->bh
->b_blocknr
);
4156 commit
->j_realblock
[i
- trans_half
] =
4157 cpu_to_le32(cn
->bh
->b_blocknr
);
4163 set_desc_trans_len(desc
, journal
->j_len
);
4164 set_desc_mount_id(desc
, journal
->j_mount_id
);
4165 set_desc_trans_id(desc
, journal
->j_trans_id
);
4166 set_commit_trans_len(commit
, journal
->j_len
);
4169 * special check in case all buffers in the journal
4170 * were marked for not logging
4172 BUG_ON(journal
->j_len
== 0);
4175 * we're about to dirty all the log blocks, mark the description block
4176 * dirty now too. Don't mark the commit block dirty until all the
4177 * others are on disk
4179 mark_buffer_dirty(d_bh
);
4182 * first data block is j_start + 1, so add one to
4183 * cur_write_start wherever you use it
4185 cur_write_start
= journal
->j_start
;
4186 cn
= journal
->j_first
;
4187 jindex
= 1; /* start at one so we don't get the desc again */
4189 clear_buffer_journal_new(cn
->bh
);
4190 /* copy all the real blocks into log area. dirty log blocks */
4191 if (buffer_journaled(cn
->bh
)) {
4192 struct buffer_head
*tmp_bh
;
4197 SB_ONDISK_JOURNAL_1st_BLOCK(sb
) +
4200 SB_ONDISK_JOURNAL_SIZE(sb
)));
4201 set_buffer_uptodate(tmp_bh
);
4202 page
= cn
->bh
->b_page
;
4204 memcpy(tmp_bh
->b_data
,
4205 addr
+ offset_in_page(cn
->bh
->b_data
),
4208 mark_buffer_dirty(tmp_bh
);
4210 set_buffer_journal_dirty(cn
->bh
);
4211 clear_buffer_journaled(cn
->bh
);
4214 * JDirty cleared sometime during transaction.
4215 * don't log this one
4217 reiserfs_warning(sb
, "journal-2048",
4218 "BAD, buffer in journal hash, "
4225 reiserfs_cond_resched(sb
);
4229 * we are done with both the c_bh and d_bh, but
4230 * c_bh must be written after all other commit blocks,
4231 * so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
4234 journal
->j_current_jl
= alloc_journal_list(sb
);
4236 /* now it is safe to insert this transaction on the main list */
4237 list_add_tail(&jl
->j_list
, &journal
->j_journal_list
);
4238 list_add_tail(&jl
->j_working_list
, &journal
->j_working_list
);
4239 journal
->j_num_work_lists
++;
4241 /* reset journal values for the next transaction */
4242 old_start
= journal
->j_start
;
4244 (journal
->j_start
+ journal
->j_len
+
4245 2) % SB_ONDISK_JOURNAL_SIZE(sb
);
4246 atomic_set(&journal
->j_wcount
, 0);
4247 journal
->j_bcount
= 0;
4248 journal
->j_last
= NULL
;
4249 journal
->j_first
= NULL
;
4251 journal
->j_trans_start_time
= 0;
4252 /* check for trans_id overflow */
4253 if (++journal
->j_trans_id
== 0)
4254 journal
->j_trans_id
= 10;
4255 journal
->j_current_jl
->j_trans_id
= journal
->j_trans_id
;
4256 journal
->j_must_wait
= 0;
4257 journal
->j_len_alloc
= 0;
4258 journal
->j_next_full_flush
= 0;
4259 journal
->j_next_async_flush
= 0;
4260 init_journal_hash(sb
);
4263 * make sure reiserfs_add_jh sees the new current_jl before we
4264 * write out the tails
4269 * tail conversion targets have to hit the disk before we end the
4270 * transaction. Otherwise a later transaction might repack the tail
4271 * before this transaction commits, leaving the data block unflushed
4272 * and clean, if we crash before the later transaction commits, the
4273 * data block is lost.
4275 if (!list_empty(&jl
->j_tail_bh_list
)) {
4276 depth
= reiserfs_write_unlock_nested(sb
);
4277 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
4278 journal
, jl
, &jl
->j_tail_bh_list
);
4279 reiserfs_write_lock_nested(sb
, depth
);
4281 BUG_ON(!list_empty(&jl
->j_tail_bh_list
));
4282 mutex_unlock(&jl
->j_commit_mutex
);
4285 * honor the flush wishes from the caller, simple commits can
4286 * be done outside the journal lock, they are done below
4288 * if we don't flush the commit list right now, we put it into
4289 * the work queue so the people waiting on the async progress work
4290 * queue don't wait for this proc to flush journal lists and such.
4293 flush_commit_list(sb
, jl
, 1);
4294 flush_journal_list(sb
, jl
, 1);
4295 } else if (!(jl
->j_state
& LIST_COMMIT_PENDING
))
4296 queue_delayed_work(REISERFS_SB(sb
)->commit_wq
,
4297 &journal
->j_work
, HZ
/ 10);
4300 * if the next transaction has any chance of wrapping, flush
4301 * transactions that might get overwritten. If any journal lists
4302 * are very old flush them as well.
4305 list_for_each_safe(entry
, safe
, &journal
->j_journal_list
) {
4306 temp_jl
= JOURNAL_LIST_ENTRY(entry
);
4307 if (journal
->j_start
<= temp_jl
->j_start
) {
4308 if ((journal
->j_start
+ journal
->j_trans_max
+ 1) >=
4310 flush_used_journal_lists(sb
, temp_jl
);
4312 } else if ((journal
->j_start
+
4313 journal
->j_trans_max
+ 1) <
4314 SB_ONDISK_JOURNAL_SIZE(sb
)) {
4316 * if we don't cross into the next
4317 * transaction and we don't wrap, there is
4318 * no way we can overlap any later transactions
4323 } else if ((journal
->j_start
+
4324 journal
->j_trans_max
+ 1) >
4325 SB_ONDISK_JOURNAL_SIZE(sb
)) {
4326 if (((journal
->j_start
+ journal
->j_trans_max
+ 1) %
4327 SB_ONDISK_JOURNAL_SIZE(sb
)) >=
4329 flush_used_journal_lists(sb
, temp_jl
);
4333 * we don't overlap anything from out start
4334 * to the end of the log, and our wrapped
4335 * portion doesn't overlap anything at
4336 * the start of the log. We can break
4343 journal
->j_current_jl
->j_list_bitmap
=
4344 get_list_bitmap(sb
, journal
->j_current_jl
);
4346 if (!(journal
->j_current_jl
->j_list_bitmap
)) {
4347 reiserfs_panic(sb
, "journal-1996",
4348 "could not get a list bitmap");
4351 atomic_set(&journal
->j_jlock
, 0);
4353 /* wake up any body waiting to join. */
4354 clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
4355 wake_up(&journal
->j_join_wait
);
4357 if (!flush
&& wait_on_commit
&&
4358 journal_list_still_alive(sb
, commit_trans_id
)) {
4359 flush_commit_list(sb
, jl
, 1);
4362 reiserfs_check_lock_depth(sb
, "journal end2");
4364 memset(th
, 0, sizeof(*th
));
4366 * Re-set th->t_super, so we can properly keep track of how many
4367 * persistent transactions there are. We need to do this so if this
4368 * call is part of a failed restart_transaction, we can free it later
4372 return journal
->j_errno
;
4375 /* Send the file system read only and refuse new transactions */
4376 void reiserfs_abort_journal(struct super_block
*sb
, int errno
)
4378 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4379 if (test_bit(J_ABORTED
, &journal
->j_state
))
4382 if (!journal
->j_errno
)
4383 journal
->j_errno
= errno
;
4385 sb
->s_flags
|= MS_RDONLY
;
4386 set_bit(J_ABORTED
, &journal
->j_state
);
4388 #ifdef CONFIG_REISERFS_CHECK