2 ** Write ahead logging implementation copyright Chris Mason 2000
4 ** The background commits make this code very interelated, 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 <asm/uaccess.h>
38 #include <asm/system.h>
40 #include <linux/time.h>
41 #include <asm/semaphore.h>
43 #include <linux/vmalloc.h>
44 #include <linux/reiserfs_fs.h>
46 #include <linux/kernel.h>
47 #include <linux/errno.h>
48 #include <linux/fcntl.h>
49 #include <linux/stat.h>
50 #include <linux/string.h>
51 #include <linux/smp_lock.h>
52 #include <linux/buffer_head.h>
53 #include <linux/workqueue.h>
54 #include <linux/writeback.h>
55 #include <linux/blkdev.h>
56 #include <linux/backing-dev.h>
58 /* gets a struct reiserfs_journal_list * from a list head */
59 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
61 #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
64 /* the number of mounted filesystems. This is used to decide when to
65 ** start and kill the commit workqueue
67 static int reiserfs_mounted_fs_count
;
69 static struct workqueue_struct
*commit_wq
;
71 #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit
73 #define BUFNR 64 /*read ahead */
75 /* cnode stat bits. Move these into reiserfs_fs.h */
77 #define BLOCK_FREED 2 /* this block was freed, and can't be written. */
78 #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */
80 #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */
81 #define BLOCK_DIRTIED 5
83 /* journal list state bits */
84 #define LIST_TOUCHED 1
86 #define LIST_COMMIT_PENDING 4 /* someone will commit this list */
88 /* flags for do_journal_end */
89 #define FLUSH_ALL 1 /* flush commit and real blocks */
90 #define COMMIT_NOW 2 /* end and commit this transaction */
91 #define WAIT 4 /* wait for the log blocks to hit the disk */
93 static int do_journal_end(struct reiserfs_transaction_handle
*,
94 struct super_block
*, unsigned long nblocks
,
96 static int flush_journal_list(struct super_block
*s
,
97 struct reiserfs_journal_list
*jl
, int flushall
);
98 static int flush_commit_list(struct super_block
*s
,
99 struct reiserfs_journal_list
*jl
, int flushall
);
100 static int can_dirty(struct reiserfs_journal_cnode
*cn
);
101 static int journal_join(struct reiserfs_transaction_handle
*th
,
102 struct super_block
*p_s_sb
, unsigned long nblocks
);
103 static int release_journal_dev(struct super_block
*super
,
104 struct reiserfs_journal
*journal
);
105 static int dirty_one_transaction(struct super_block
*s
,
106 struct reiserfs_journal_list
*jl
);
107 static void flush_async_commits(struct work_struct
*work
);
108 static void queue_log_writer(struct super_block
*s
);
110 /* values for join in do_journal_begin_r */
112 JBEGIN_REG
= 0, /* regular journal begin */
113 JBEGIN_JOIN
= 1, /* join the running transaction if at all possible */
114 JBEGIN_ABORT
= 2, /* called from cleanup code, ignores aborted flag */
117 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
118 struct super_block
*p_s_sb
,
119 unsigned long nblocks
, int join
);
121 static void init_journal_hash(struct super_block
*p_s_sb
)
123 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
124 memset(journal
->j_hash_table
, 0,
125 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
129 ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to
130 ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for
133 static int reiserfs_clean_and_file_buffer(struct buffer_head
*bh
)
136 clear_buffer_dirty(bh
);
137 clear_buffer_journal_test(bh
);
142 static void disable_barrier(struct super_block
*s
)
144 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_BARRIER_FLUSH
);
145 printk("reiserfs: disabling flush barriers on %s\n",
146 reiserfs_bdevname(s
));
149 static struct reiserfs_bitmap_node
*allocate_bitmap_node(struct super_block
152 struct reiserfs_bitmap_node
*bn
;
155 bn
= kmalloc(sizeof(struct reiserfs_bitmap_node
), GFP_NOFS
);
159 bn
->data
= kzalloc(p_s_sb
->s_blocksize
, GFP_NOFS
);
165 INIT_LIST_HEAD(&bn
->list
);
169 static struct reiserfs_bitmap_node
*get_bitmap_node(struct super_block
*p_s_sb
)
171 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
172 struct reiserfs_bitmap_node
*bn
= NULL
;
173 struct list_head
*entry
= journal
->j_bitmap_nodes
.next
;
175 journal
->j_used_bitmap_nodes
++;
178 if (entry
!= &journal
->j_bitmap_nodes
) {
179 bn
= list_entry(entry
, struct reiserfs_bitmap_node
, list
);
181 memset(bn
->data
, 0, p_s_sb
->s_blocksize
);
182 journal
->j_free_bitmap_nodes
--;
185 bn
= allocate_bitmap_node(p_s_sb
);
192 static inline void free_bitmap_node(struct super_block
*p_s_sb
,
193 struct reiserfs_bitmap_node
*bn
)
195 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
196 journal
->j_used_bitmap_nodes
--;
197 if (journal
->j_free_bitmap_nodes
> REISERFS_MAX_BITMAP_NODES
) {
201 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
202 journal
->j_free_bitmap_nodes
++;
206 static void allocate_bitmap_nodes(struct super_block
*p_s_sb
)
209 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
210 struct reiserfs_bitmap_node
*bn
= NULL
;
211 for (i
= 0; i
< REISERFS_MIN_BITMAP_NODES
; i
++) {
212 bn
= allocate_bitmap_node(p_s_sb
);
214 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
215 journal
->j_free_bitmap_nodes
++;
217 break; // this is ok, we'll try again when more are needed
222 static int set_bit_in_list_bitmap(struct super_block
*p_s_sb
, int block
,
223 struct reiserfs_list_bitmap
*jb
)
225 int bmap_nr
= block
/ (p_s_sb
->s_blocksize
<< 3);
226 int bit_nr
= block
% (p_s_sb
->s_blocksize
<< 3);
228 if (!jb
->bitmaps
[bmap_nr
]) {
229 jb
->bitmaps
[bmap_nr
] = get_bitmap_node(p_s_sb
);
231 set_bit(bit_nr
, (unsigned long *)jb
->bitmaps
[bmap_nr
]->data
);
235 static void cleanup_bitmap_list(struct super_block
*p_s_sb
,
236 struct reiserfs_list_bitmap
*jb
)
239 if (jb
->bitmaps
== NULL
)
242 for (i
= 0; i
< SB_BMAP_NR(p_s_sb
); i
++) {
243 if (jb
->bitmaps
[i
]) {
244 free_bitmap_node(p_s_sb
, jb
->bitmaps
[i
]);
245 jb
->bitmaps
[i
] = NULL
;
251 ** only call this on FS unmount.
253 static int free_list_bitmaps(struct super_block
*p_s_sb
,
254 struct reiserfs_list_bitmap
*jb_array
)
257 struct reiserfs_list_bitmap
*jb
;
258 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
260 jb
->journal_list
= NULL
;
261 cleanup_bitmap_list(p_s_sb
, jb
);
268 static int free_bitmap_nodes(struct super_block
*p_s_sb
)
270 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
271 struct list_head
*next
= journal
->j_bitmap_nodes
.next
;
272 struct reiserfs_bitmap_node
*bn
;
274 while (next
!= &journal
->j_bitmap_nodes
) {
275 bn
= list_entry(next
, struct reiserfs_bitmap_node
, list
);
279 next
= journal
->j_bitmap_nodes
.next
;
280 journal
->j_free_bitmap_nodes
--;
287 ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
288 ** jb_array is the array to be filled in.
290 int reiserfs_allocate_list_bitmaps(struct super_block
*p_s_sb
,
291 struct reiserfs_list_bitmap
*jb_array
,
296 struct reiserfs_list_bitmap
*jb
;
297 int mem
= bmap_nr
* sizeof(struct reiserfs_bitmap_node
*);
299 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
301 jb
->journal_list
= NULL
;
302 jb
->bitmaps
= vmalloc(mem
);
304 reiserfs_warning(p_s_sb
,
305 "clm-2000, unable to allocate bitmaps for journal lists");
309 memset(jb
->bitmaps
, 0, mem
);
312 free_list_bitmaps(p_s_sb
, jb_array
);
319 ** find an available list bitmap. If you can't find one, flush a commit list
322 static struct reiserfs_list_bitmap
*get_list_bitmap(struct super_block
*p_s_sb
,
323 struct reiserfs_journal_list
327 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
328 struct reiserfs_list_bitmap
*jb
= NULL
;
330 for (j
= 0; j
< (JOURNAL_NUM_BITMAPS
* 3); j
++) {
331 i
= journal
->j_list_bitmap_index
;
332 journal
->j_list_bitmap_index
= (i
+ 1) % JOURNAL_NUM_BITMAPS
;
333 jb
= journal
->j_list_bitmap
+ i
;
334 if (journal
->j_list_bitmap
[i
].journal_list
) {
335 flush_commit_list(p_s_sb
,
336 journal
->j_list_bitmap
[i
].
338 if (!journal
->j_list_bitmap
[i
].journal_list
) {
345 if (jb
->journal_list
) { /* double check to make sure if flushed correctly */
348 jb
->journal_list
= jl
;
353 ** allocates a new chunk of X nodes, and links them all together as a list.
354 ** Uses the cnode->next and cnode->prev pointers
355 ** returns NULL on failure
357 static struct reiserfs_journal_cnode
*allocate_cnodes(int num_cnodes
)
359 struct reiserfs_journal_cnode
*head
;
361 if (num_cnodes
<= 0) {
364 head
= vmalloc(num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
368 memset(head
, 0, num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
370 head
[0].next
= head
+ 1;
371 for (i
= 1; i
< num_cnodes
; i
++) {
372 head
[i
].prev
= head
+ (i
- 1);
373 head
[i
].next
= head
+ (i
+ 1); /* if last one, overwrite it after the if */
375 head
[num_cnodes
- 1].next
= NULL
;
380 ** pulls a cnode off the free list, or returns NULL on failure
382 static struct reiserfs_journal_cnode
*get_cnode(struct super_block
*p_s_sb
)
384 struct reiserfs_journal_cnode
*cn
;
385 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
387 reiserfs_check_lock_depth(p_s_sb
, "get_cnode");
389 if (journal
->j_cnode_free
<= 0) {
392 journal
->j_cnode_used
++;
393 journal
->j_cnode_free
--;
394 cn
= journal
->j_cnode_free_list
;
399 cn
->next
->prev
= NULL
;
401 journal
->j_cnode_free_list
= cn
->next
;
402 memset(cn
, 0, sizeof(struct reiserfs_journal_cnode
));
407 ** returns a cnode to the free list
409 static void free_cnode(struct super_block
*p_s_sb
,
410 struct reiserfs_journal_cnode
*cn
)
412 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
414 reiserfs_check_lock_depth(p_s_sb
, "free_cnode");
416 journal
->j_cnode_used
--;
417 journal
->j_cnode_free
++;
418 /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
419 cn
->next
= journal
->j_cnode_free_list
;
420 if (journal
->j_cnode_free_list
) {
421 journal
->j_cnode_free_list
->prev
= cn
;
423 cn
->prev
= NULL
; /* not needed with the memset, but I might kill the memset, and forget to do this */
424 journal
->j_cnode_free_list
= cn
;
427 static void clear_prepared_bits(struct buffer_head
*bh
)
429 clear_buffer_journal_prepared(bh
);
430 clear_buffer_journal_restore_dirty(bh
);
433 /* utility function to force a BUG if it is called without the big
434 ** kernel lock held. caller is the string printed just before calling BUG()
436 void reiserfs_check_lock_depth(struct super_block
*sb
, char *caller
)
439 if (current
->lock_depth
< 0) {
440 reiserfs_panic(sb
, "%s called without kernel lock held",
448 /* return a cnode with same dev, block number and size in table, or null if not found */
449 static inline struct reiserfs_journal_cnode
*get_journal_hash_dev(struct
453 reiserfs_journal_cnode
457 struct reiserfs_journal_cnode
*cn
;
458 cn
= journal_hash(table
, sb
, bl
);
460 if (cn
->blocknr
== bl
&& cn
->sb
== sb
)
464 return (struct reiserfs_journal_cnode
*)0;
468 ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated
469 ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
470 ** being overwritten by a replay after crashing.
472 ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting
473 ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make
474 ** sure you never write the block without logging it.
476 ** next_zero_bit is a suggestion about the next block to try for find_forward.
477 ** when bl is rejected because it is set in a journal list bitmap, we search
478 ** for the next zero bit in the bitmap that rejected bl. Then, we return that
479 ** through next_zero_bit for find_forward to try.
481 ** Just because we return something in next_zero_bit does not mean we won't
482 ** reject it on the next call to reiserfs_in_journal
485 int reiserfs_in_journal(struct super_block
*p_s_sb
,
486 int bmap_nr
, int bit_nr
, int search_all
,
487 b_blocknr_t
* next_zero_bit
)
489 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
490 struct reiserfs_journal_cnode
*cn
;
491 struct reiserfs_list_bitmap
*jb
;
495 *next_zero_bit
= 0; /* always start this at zero. */
497 PROC_INFO_INC(p_s_sb
, journal
.in_journal
);
498 /* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
499 ** if we crash before the transaction that freed it commits, this transaction won't
500 ** have committed either, and the block will never be written
503 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
504 PROC_INFO_INC(p_s_sb
, journal
.in_journal_bitmap
);
505 jb
= journal
->j_list_bitmap
+ i
;
506 if (jb
->journal_list
&& jb
->bitmaps
[bmap_nr
] &&
508 (unsigned long *)jb
->bitmaps
[bmap_nr
]->
511 find_next_zero_bit((unsigned long *)
512 (jb
->bitmaps
[bmap_nr
]->
514 p_s_sb
->s_blocksize
<< 3,
521 bl
= bmap_nr
* (p_s_sb
->s_blocksize
<< 3) + bit_nr
;
522 /* is it in any old transactions? */
525 get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
, bl
))) {
529 /* is it in the current transaction. This should never happen */
530 if ((cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, bl
))) {
535 PROC_INFO_INC(p_s_sb
, journal
.in_journal_reusable
);
540 /* insert cn into table
542 static inline void insert_journal_hash(struct reiserfs_journal_cnode
**table
,
543 struct reiserfs_journal_cnode
*cn
)
545 struct reiserfs_journal_cnode
*cn_orig
;
547 cn_orig
= journal_hash(table
, cn
->sb
, cn
->blocknr
);
553 journal_hash(table
, cn
->sb
, cn
->blocknr
) = cn
;
556 /* lock the current transaction */
557 static inline void lock_journal(struct super_block
*p_s_sb
)
559 PROC_INFO_INC(p_s_sb
, journal
.lock_journal
);
560 down(&SB_JOURNAL(p_s_sb
)->j_lock
);
563 /* unlock the current transaction */
564 static inline void unlock_journal(struct super_block
*p_s_sb
)
566 up(&SB_JOURNAL(p_s_sb
)->j_lock
);
569 static inline void get_journal_list(struct reiserfs_journal_list
*jl
)
574 static inline void put_journal_list(struct super_block
*s
,
575 struct reiserfs_journal_list
*jl
)
577 if (jl
->j_refcount
< 1) {
578 reiserfs_panic(s
, "trans id %lu, refcount at %d",
579 jl
->j_trans_id
, jl
->j_refcount
);
581 if (--jl
->j_refcount
== 0)
586 ** this used to be much more involved, and I'm keeping it just in case things get ugly again.
587 ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
590 static void cleanup_freed_for_journal_list(struct super_block
*p_s_sb
,
591 struct reiserfs_journal_list
*jl
)
594 struct reiserfs_list_bitmap
*jb
= jl
->j_list_bitmap
;
596 cleanup_bitmap_list(p_s_sb
, jb
);
598 jl
->j_list_bitmap
->journal_list
= NULL
;
599 jl
->j_list_bitmap
= NULL
;
602 static int journal_list_still_alive(struct super_block
*s
,
603 unsigned long trans_id
)
605 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
606 struct list_head
*entry
= &journal
->j_journal_list
;
607 struct reiserfs_journal_list
*jl
;
609 if (!list_empty(entry
)) {
610 jl
= JOURNAL_LIST_ENTRY(entry
->next
);
611 if (jl
->j_trans_id
<= trans_id
) {
619 * If page->mapping was null, we failed to truncate this page for
620 * some reason. Most likely because it was truncated after being
621 * logged via data=journal.
623 * This does a check to see if the buffer belongs to one of these
624 * lost pages before doing the final put_bh. If page->mapping was
625 * null, it tries to free buffers on the page, which should make the
626 * final page_cache_release drop the page from the lru.
628 static void release_buffer_page(struct buffer_head
*bh
)
630 struct page
*page
= bh
->b_page
;
631 if (!page
->mapping
&& !TestSetPageLocked(page
)) {
632 page_cache_get(page
);
635 try_to_free_buffers(page
);
637 page_cache_release(page
);
643 static void reiserfs_end_buffer_io_sync(struct buffer_head
*bh
, int uptodate
)
645 char b
[BDEVNAME_SIZE
];
647 if (buffer_journaled(bh
)) {
648 reiserfs_warning(NULL
,
649 "clm-2084: pinned buffer %lu:%s sent to disk",
650 bh
->b_blocknr
, bdevname(bh
->b_bdev
, b
));
653 set_buffer_uptodate(bh
);
655 clear_buffer_uptodate(bh
);
658 release_buffer_page(bh
);
661 static void reiserfs_end_ordered_io(struct buffer_head
*bh
, int uptodate
)
664 set_buffer_uptodate(bh
);
666 clear_buffer_uptodate(bh
);
671 static void submit_logged_buffer(struct buffer_head
*bh
)
674 bh
->b_end_io
= reiserfs_end_buffer_io_sync
;
675 clear_buffer_journal_new(bh
);
676 clear_buffer_dirty(bh
);
677 if (!test_clear_buffer_journal_test(bh
))
679 if (!buffer_uptodate(bh
))
681 submit_bh(WRITE
, bh
);
684 static void submit_ordered_buffer(struct buffer_head
*bh
)
687 bh
->b_end_io
= reiserfs_end_ordered_io
;
688 clear_buffer_dirty(bh
);
689 if (!buffer_uptodate(bh
))
691 submit_bh(WRITE
, bh
);
694 static int submit_barrier_buffer(struct buffer_head
*bh
)
697 bh
->b_end_io
= reiserfs_end_ordered_io
;
698 clear_buffer_dirty(bh
);
699 if (!buffer_uptodate(bh
))
701 return submit_bh(WRITE_BARRIER
, bh
);
704 static void check_barrier_completion(struct super_block
*s
,
705 struct buffer_head
*bh
)
707 if (buffer_eopnotsupp(bh
)) {
708 clear_buffer_eopnotsupp(bh
);
710 set_buffer_uptodate(bh
);
711 set_buffer_dirty(bh
);
712 sync_dirty_buffer(bh
);
716 #define CHUNK_SIZE 32
717 struct buffer_chunk
{
718 struct buffer_head
*bh
[CHUNK_SIZE
];
722 static void write_chunk(struct buffer_chunk
*chunk
)
726 for (i
= 0; i
< chunk
->nr
; i
++) {
727 submit_logged_buffer(chunk
->bh
[i
]);
733 static void write_ordered_chunk(struct buffer_chunk
*chunk
)
737 for (i
= 0; i
< chunk
->nr
; i
++) {
738 submit_ordered_buffer(chunk
->bh
[i
]);
744 static int add_to_chunk(struct buffer_chunk
*chunk
, struct buffer_head
*bh
,
745 spinlock_t
* lock
, void (fn
) (struct buffer_chunk
*))
748 BUG_ON(chunk
->nr
>= CHUNK_SIZE
);
749 chunk
->bh
[chunk
->nr
++] = bh
;
750 if (chunk
->nr
>= CHUNK_SIZE
) {
761 static atomic_t nr_reiserfs_jh
= ATOMIC_INIT(0);
762 static struct reiserfs_jh
*alloc_jh(void)
764 struct reiserfs_jh
*jh
;
766 jh
= kmalloc(sizeof(*jh
), GFP_NOFS
);
768 atomic_inc(&nr_reiserfs_jh
);
776 * we want to free the jh when the buffer has been written
779 void reiserfs_free_jh(struct buffer_head
*bh
)
781 struct reiserfs_jh
*jh
;
785 bh
->b_private
= NULL
;
787 list_del_init(&jh
->list
);
789 if (atomic_read(&nr_reiserfs_jh
) <= 0)
791 atomic_dec(&nr_reiserfs_jh
);
796 static inline int __add_jh(struct reiserfs_journal
*j
, struct buffer_head
*bh
,
799 struct reiserfs_jh
*jh
;
802 spin_lock(&j
->j_dirty_buffers_lock
);
803 if (!bh
->b_private
) {
804 spin_unlock(&j
->j_dirty_buffers_lock
);
808 list_del_init(&jh
->list
);
813 spin_lock(&j
->j_dirty_buffers_lock
);
814 /* buffer must be locked for __add_jh, should be able to have
815 * two adds at the same time
817 BUG_ON(bh
->b_private
);
821 jh
->jl
= j
->j_current_jl
;
823 list_add_tail(&jh
->list
, &jh
->jl
->j_tail_bh_list
);
825 list_add_tail(&jh
->list
, &jh
->jl
->j_bh_list
);
827 spin_unlock(&j
->j_dirty_buffers_lock
);
831 int reiserfs_add_tail_list(struct inode
*inode
, struct buffer_head
*bh
)
833 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 1);
835 int reiserfs_add_ordered_list(struct inode
*inode
, struct buffer_head
*bh
)
837 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 0);
840 #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
841 static int write_ordered_buffers(spinlock_t
* lock
,
842 struct reiserfs_journal
*j
,
843 struct reiserfs_journal_list
*jl
,
844 struct list_head
*list
)
846 struct buffer_head
*bh
;
847 struct reiserfs_jh
*jh
;
848 int ret
= j
->j_errno
;
849 struct buffer_chunk chunk
;
850 struct list_head tmp
;
851 INIT_LIST_HEAD(&tmp
);
855 while (!list_empty(list
)) {
856 jh
= JH_ENTRY(list
->next
);
859 if (test_set_buffer_locked(bh
)) {
860 if (!buffer_dirty(bh
)) {
861 list_move(&jh
->list
, &tmp
);
866 write_ordered_chunk(&chunk
);
872 /* in theory, dirty non-uptodate buffers should never get here,
873 * but the upper layer io error paths still have a few quirks.
874 * Handle them here as gracefully as we can
876 if (!buffer_uptodate(bh
) && buffer_dirty(bh
)) {
877 clear_buffer_dirty(bh
);
880 if (buffer_dirty(bh
)) {
881 list_move(&jh
->list
, &tmp
);
882 add_to_chunk(&chunk
, bh
, lock
, write_ordered_chunk
);
884 reiserfs_free_jh(bh
);
889 cond_resched_lock(lock
);
893 write_ordered_chunk(&chunk
);
896 while (!list_empty(&tmp
)) {
897 jh
= JH_ENTRY(tmp
.prev
);
900 reiserfs_free_jh(bh
);
902 if (buffer_locked(bh
)) {
907 if (!buffer_uptodate(bh
)) {
910 /* ugly interaction with invalidatepage here.
911 * reiserfs_invalidate_page will pin any buffer that has a valid
912 * journal head from an older transaction. If someone else sets
913 * our buffer dirty after we write it in the first loop, and
914 * then someone truncates the page away, nobody will ever write
915 * the buffer. We're safe if we write the page one last time
916 * after freeing the journal header.
918 if (buffer_dirty(bh
) && unlikely(bh
->b_page
->mapping
== NULL
)) {
920 ll_rw_block(WRITE
, 1, &bh
);
924 cond_resched_lock(lock
);
930 static int flush_older_commits(struct super_block
*s
,
931 struct reiserfs_journal_list
*jl
)
933 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
934 struct reiserfs_journal_list
*other_jl
;
935 struct reiserfs_journal_list
*first_jl
;
936 struct list_head
*entry
;
937 unsigned long trans_id
= jl
->j_trans_id
;
938 unsigned long other_trans_id
;
939 unsigned long first_trans_id
;
943 * first we walk backwards to find the oldest uncommitted transation
946 entry
= jl
->j_list
.prev
;
948 other_jl
= JOURNAL_LIST_ENTRY(entry
);
949 if (entry
== &journal
->j_journal_list
||
950 atomic_read(&other_jl
->j_older_commits_done
))
954 entry
= other_jl
->j_list
.prev
;
957 /* if we didn't find any older uncommitted transactions, return now */
958 if (first_jl
== jl
) {
962 first_trans_id
= first_jl
->j_trans_id
;
964 entry
= &first_jl
->j_list
;
966 other_jl
= JOURNAL_LIST_ENTRY(entry
);
967 other_trans_id
= other_jl
->j_trans_id
;
969 if (other_trans_id
< trans_id
) {
970 if (atomic_read(&other_jl
->j_commit_left
) != 0) {
971 flush_commit_list(s
, other_jl
, 0);
973 /* list we were called with is gone, return */
974 if (!journal_list_still_alive(s
, trans_id
))
977 /* the one we just flushed is gone, this means all
978 * older lists are also gone, so first_jl is no longer
979 * valid either. Go back to the beginning.
981 if (!journal_list_still_alive
982 (s
, other_trans_id
)) {
987 if (entry
== &journal
->j_journal_list
)
996 static int reiserfs_async_progress_wait(struct super_block
*s
)
999 struct reiserfs_journal
*j
= SB_JOURNAL(s
);
1000 if (atomic_read(&j
->j_async_throttle
))
1001 congestion_wait(WRITE
, HZ
/ 10);
1006 ** if this journal list still has commit blocks unflushed, send them to disk.
1008 ** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
1009 ** Before the commit block can by written, every other log block must be safely on disk
1012 static int flush_commit_list(struct super_block
*s
,
1013 struct reiserfs_journal_list
*jl
, int flushall
)
1017 struct buffer_head
*tbh
= NULL
;
1018 unsigned long trans_id
= jl
->j_trans_id
;
1019 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1024 reiserfs_check_lock_depth(s
, "flush_commit_list");
1026 if (atomic_read(&jl
->j_older_commits_done
)) {
1032 /* before we can put our commit blocks on disk, we have to make sure everyone older than
1033 ** us is on disk too
1035 BUG_ON(jl
->j_len
<= 0);
1036 BUG_ON(trans_id
== journal
->j_trans_id
);
1038 get_journal_list(jl
);
1040 if (flush_older_commits(s
, jl
) == 1) {
1041 /* list disappeared during flush_older_commits. return */
1046 /* make sure nobody is trying to flush this one at the same time */
1047 down(&jl
->j_commit_lock
);
1048 if (!journal_list_still_alive(s
, trans_id
)) {
1049 up(&jl
->j_commit_lock
);
1052 BUG_ON(jl
->j_trans_id
== 0);
1054 /* this commit is done, exit */
1055 if (atomic_read(&(jl
->j_commit_left
)) <= 0) {
1057 atomic_set(&(jl
->j_older_commits_done
), 1);
1059 up(&jl
->j_commit_lock
);
1063 if (!list_empty(&jl
->j_bh_list
)) {
1066 ret
= write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
1067 journal
, jl
, &jl
->j_bh_list
);
1068 if (ret
< 0 && retval
== 0)
1072 BUG_ON(!list_empty(&jl
->j_bh_list
));
1074 * for the description block and all the log blocks, submit any buffers
1075 * that haven't already reached the disk. Try to write at least 256
1076 * log blocks. later on, we will only wait on blocks that correspond
1077 * to this transaction, but while we're unplugging we might as well
1078 * get a chunk of data on there.
1080 atomic_inc(&journal
->j_async_throttle
);
1081 write_len
= jl
->j_len
+ 1;
1082 if (write_len
< 256)
1084 for (i
= 0 ; i
< write_len
; i
++) {
1085 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) + (jl
->j_start
+ i
) %
1086 SB_ONDISK_JOURNAL_SIZE(s
);
1087 tbh
= journal_find_get_block(s
, bn
);
1089 if (buffer_dirty(tbh
))
1090 ll_rw_block(WRITE
, 1, &tbh
) ;
1094 atomic_dec(&journal
->j_async_throttle
);
1096 /* We're skipping the commit if there's an error */
1097 if (retval
|| reiserfs_is_journal_aborted(journal
))
1100 /* wait on everything written so far before writing the commit
1101 * if we are in barrier mode, send the commit down now
1103 barrier
= reiserfs_barrier_flush(s
);
1106 lock_buffer(jl
->j_commit_bh
);
1107 ret
= submit_barrier_buffer(jl
->j_commit_bh
);
1108 if (ret
== -EOPNOTSUPP
) {
1109 set_buffer_uptodate(jl
->j_commit_bh
);
1114 for (i
= 0; i
< (jl
->j_len
+ 1); i
++) {
1115 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) +
1116 (jl
->j_start
+ i
) % SB_ONDISK_JOURNAL_SIZE(s
);
1117 tbh
= journal_find_get_block(s
, bn
);
1118 wait_on_buffer(tbh
);
1119 // since we're using ll_rw_blk above, it might have skipped over
1120 // a locked buffer. Double check here
1122 if (buffer_dirty(tbh
)) /* redundant, sync_dirty_buffer() checks */
1123 sync_dirty_buffer(tbh
);
1124 if (unlikely(!buffer_uptodate(tbh
))) {
1125 #ifdef CONFIG_REISERFS_CHECK
1126 reiserfs_warning(s
, "journal-601, buffer write failed");
1130 put_bh(tbh
); /* once for journal_find_get_block */
1131 put_bh(tbh
); /* once due to original getblk in do_journal_end */
1132 atomic_dec(&(jl
->j_commit_left
));
1135 BUG_ON(atomic_read(&(jl
->j_commit_left
)) != 1);
1138 /* If there was a write error in the journal - we can't commit
1139 * this transaction - it will be invalid and, if successful,
1140 * will just end up propagating the write error out to
1141 * the file system. */
1142 if (likely(!retval
&& !reiserfs_is_journal_aborted (journal
))) {
1143 if (buffer_dirty(jl
->j_commit_bh
))
1145 mark_buffer_dirty(jl
->j_commit_bh
) ;
1146 sync_dirty_buffer(jl
->j_commit_bh
) ;
1149 wait_on_buffer(jl
->j_commit_bh
);
1151 check_barrier_completion(s
, jl
->j_commit_bh
);
1153 /* If there was a write error in the journal - we can't commit this
1154 * transaction - it will be invalid and, if successful, will just end
1155 * up propagating the write error out to the filesystem. */
1156 if (unlikely(!buffer_uptodate(jl
->j_commit_bh
))) {
1157 #ifdef CONFIG_REISERFS_CHECK
1158 reiserfs_warning(s
, "journal-615: buffer write failed");
1162 bforget(jl
->j_commit_bh
);
1163 if (journal
->j_last_commit_id
!= 0 &&
1164 (jl
->j_trans_id
- journal
->j_last_commit_id
) != 1) {
1165 reiserfs_warning(s
, "clm-2200: last commit %lu, current %lu",
1166 journal
->j_last_commit_id
, jl
->j_trans_id
);
1168 journal
->j_last_commit_id
= jl
->j_trans_id
;
1170 /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */
1171 cleanup_freed_for_journal_list(s
, jl
);
1173 retval
= retval
? retval
: journal
->j_errno
;
1175 /* mark the metadata dirty */
1177 dirty_one_transaction(s
, jl
);
1178 atomic_dec(&(jl
->j_commit_left
));
1181 atomic_set(&(jl
->j_older_commits_done
), 1);
1183 up(&jl
->j_commit_lock
);
1185 put_journal_list(s
, jl
);
1188 reiserfs_abort(s
, retval
, "Journal write error in %s",
1195 ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or
1196 ** returns NULL if it can't find anything
1198 static struct reiserfs_journal_list
*find_newer_jl_for_cn(struct
1199 reiserfs_journal_cnode
1202 struct super_block
*sb
= cn
->sb
;
1203 b_blocknr_t blocknr
= cn
->blocknr
;
1207 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
) {
1215 static int newer_jl_done(struct reiserfs_journal_cnode
*cn
)
1217 struct super_block
*sb
= cn
->sb
;
1218 b_blocknr_t blocknr
= cn
->blocknr
;
1222 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
&&
1223 atomic_read(&cn
->jlist
->j_commit_left
) != 0)
1230 static void remove_journal_hash(struct super_block
*,
1231 struct reiserfs_journal_cnode
**,
1232 struct reiserfs_journal_list
*, unsigned long,
1236 ** once all the real blocks have been flushed, it is safe to remove them from the
1237 ** journal list for this transaction. Aside from freeing the cnode, this also allows the
1238 ** block to be reallocated for data blocks if it had been deleted.
1240 static void remove_all_from_journal_list(struct super_block
*p_s_sb
,
1241 struct reiserfs_journal_list
*jl
,
1244 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1245 struct reiserfs_journal_cnode
*cn
, *last
;
1246 cn
= jl
->j_realblock
;
1248 /* which is better, to lock once around the whole loop, or
1249 ** to lock for each call to remove_journal_hash?
1252 if (cn
->blocknr
!= 0) {
1254 reiserfs_warning(p_s_sb
,
1255 "block %u, bh is %d, state %ld",
1256 cn
->blocknr
, cn
->bh
? 1 : 0,
1260 remove_journal_hash(p_s_sb
, journal
->j_list_hash_table
,
1261 jl
, cn
->blocknr
, 1);
1265 free_cnode(p_s_sb
, last
);
1267 jl
->j_realblock
= NULL
;
1271 ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
1272 ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
1273 ** releasing blocks in this transaction for reuse as data blocks.
1274 ** called by flush_journal_list, before it calls remove_all_from_journal_list
1277 static int _update_journal_header_block(struct super_block
*p_s_sb
,
1278 unsigned long offset
,
1279 unsigned long trans_id
)
1281 struct reiserfs_journal_header
*jh
;
1282 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1284 if (reiserfs_is_journal_aborted(journal
))
1287 if (trans_id
>= journal
->j_last_flush_trans_id
) {
1288 if (buffer_locked((journal
->j_header_bh
))) {
1289 wait_on_buffer((journal
->j_header_bh
));
1290 if (unlikely(!buffer_uptodate(journal
->j_header_bh
))) {
1291 #ifdef CONFIG_REISERFS_CHECK
1292 reiserfs_warning(p_s_sb
,
1293 "journal-699: buffer write failed");
1298 journal
->j_last_flush_trans_id
= trans_id
;
1299 journal
->j_first_unflushed_offset
= offset
;
1300 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->
1302 jh
->j_last_flush_trans_id
= cpu_to_le32(trans_id
);
1303 jh
->j_first_unflushed_offset
= cpu_to_le32(offset
);
1304 jh
->j_mount_id
= cpu_to_le32(journal
->j_mount_id
);
1306 if (reiserfs_barrier_flush(p_s_sb
)) {
1308 lock_buffer(journal
->j_header_bh
);
1309 ret
= submit_barrier_buffer(journal
->j_header_bh
);
1310 if (ret
== -EOPNOTSUPP
) {
1311 set_buffer_uptodate(journal
->j_header_bh
);
1312 disable_barrier(p_s_sb
);
1315 wait_on_buffer(journal
->j_header_bh
);
1316 check_barrier_completion(p_s_sb
, journal
->j_header_bh
);
1319 set_buffer_dirty(journal
->j_header_bh
);
1320 sync_dirty_buffer(journal
->j_header_bh
);
1322 if (!buffer_uptodate(journal
->j_header_bh
)) {
1323 reiserfs_warning(p_s_sb
,
1324 "journal-837: IO error during journal replay");
1331 static int update_journal_header_block(struct super_block
*p_s_sb
,
1332 unsigned long offset
,
1333 unsigned long trans_id
)
1335 return _update_journal_header_block(p_s_sb
, offset
, trans_id
);
1339 ** flush any and all journal lists older than you are
1340 ** can only be called from flush_journal_list
1342 static int flush_older_journal_lists(struct super_block
*p_s_sb
,
1343 struct reiserfs_journal_list
*jl
)
1345 struct list_head
*entry
;
1346 struct reiserfs_journal_list
*other_jl
;
1347 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1348 unsigned long trans_id
= jl
->j_trans_id
;
1350 /* we know we are the only ones flushing things, no extra race
1351 * protection is required.
1354 entry
= journal
->j_journal_list
.next
;
1356 if (entry
== &journal
->j_journal_list
)
1358 other_jl
= JOURNAL_LIST_ENTRY(entry
);
1359 if (other_jl
->j_trans_id
< trans_id
) {
1360 BUG_ON(other_jl
->j_refcount
<= 0);
1361 /* do not flush all */
1362 flush_journal_list(p_s_sb
, other_jl
, 0);
1364 /* other_jl is now deleted from the list */
1370 static void del_from_work_list(struct super_block
*s
,
1371 struct reiserfs_journal_list
*jl
)
1373 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1374 if (!list_empty(&jl
->j_working_list
)) {
1375 list_del_init(&jl
->j_working_list
);
1376 journal
->j_num_work_lists
--;
1380 /* flush a journal list, both commit and real blocks
1382 ** always set flushall to 1, unless you are calling from inside
1383 ** flush_journal_list
1385 ** IMPORTANT. This can only be called while there are no journal writers,
1386 ** and the journal is locked. That means it can only be called from
1387 ** do_journal_end, or by journal_release
1389 static int flush_journal_list(struct super_block
*s
,
1390 struct reiserfs_journal_list
*jl
, int flushall
)
1392 struct reiserfs_journal_list
*pjl
;
1393 struct reiserfs_journal_cnode
*cn
, *last
;
1397 struct buffer_head
*saved_bh
;
1398 unsigned long j_len_saved
= jl
->j_len
;
1399 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1402 BUG_ON(j_len_saved
<= 0);
1404 if (atomic_read(&journal
->j_wcount
) != 0) {
1406 "clm-2048: flush_journal_list called with wcount %d",
1407 atomic_read(&journal
->j_wcount
));
1409 BUG_ON(jl
->j_trans_id
== 0);
1411 /* if flushall == 0, the lock is already held */
1413 down(&journal
->j_flush_sem
);
1414 } else if (!down_trylock(&journal
->j_flush_sem
)) {
1419 if (j_len_saved
> journal
->j_trans_max
) {
1421 "journal-715: flush_journal_list, length is %lu, trans id %lu\n",
1422 j_len_saved
, jl
->j_trans_id
);
1428 /* if all the work is already done, get out of here */
1429 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1430 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1431 goto flush_older_and_return
;
1434 /* start by putting the commit list on disk. This will also flush
1435 ** the commit lists of any olders transactions
1437 flush_commit_list(s
, jl
, 1);
1439 if (!(jl
->j_state
& LIST_DIRTY
)
1440 && !reiserfs_is_journal_aborted(journal
))
1443 /* are we done now? */
1444 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1445 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1446 goto flush_older_and_return
;
1449 /* loop through each cnode, see if we need to write it,
1450 ** or wait on a more recent transaction, or just ignore it
1452 if (atomic_read(&(journal
->j_wcount
)) != 0) {
1454 "journal-844: panic journal list is flushing, wcount is not 0\n");
1456 cn
= jl
->j_realblock
;
1461 /* blocknr of 0 is no longer in the hash, ignore it */
1462 if (cn
->blocknr
== 0) {
1466 /* This transaction failed commit. Don't write out to the disk */
1467 if (!(jl
->j_state
& LIST_DIRTY
))
1470 pjl
= find_newer_jl_for_cn(cn
);
1471 /* the order is important here. We check pjl to make sure we
1472 ** don't clear BH_JDirty_wait if we aren't the one writing this
1475 if (!pjl
&& cn
->bh
) {
1478 /* we do this to make sure nobody releases the buffer while
1479 ** we are working with it
1483 if (buffer_journal_dirty(saved_bh
)) {
1484 BUG_ON(!can_dirty(cn
));
1487 } else if (can_dirty(cn
)) {
1488 /* everything with !pjl && jwait should be writable */
1493 /* if someone has this block in a newer transaction, just make
1494 ** sure they are committed, and don't try writing it to disk
1497 if (atomic_read(&pjl
->j_commit_left
))
1498 flush_commit_list(s
, pjl
, 1);
1502 /* bh == NULL when the block got to disk on its own, OR,
1503 ** the block got freed in a future transaction
1505 if (saved_bh
== NULL
) {
1509 /* this should never happen. kupdate_one_transaction has this list
1510 ** locked while it works, so we should never see a buffer here that
1511 ** is not marked JDirty_wait
1513 if ((!was_jwait
) && !buffer_locked(saved_bh
)) {
1515 "journal-813: BAD! buffer %llu %cdirty %cjwait, "
1516 "not in a newer tranasction",
1517 (unsigned long long)saved_bh
->
1518 b_blocknr
, was_dirty
? ' ' : '!',
1519 was_jwait
? ' ' : '!');
1522 /* we inc again because saved_bh gets decremented at free_cnode */
1524 set_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
);
1525 lock_buffer(saved_bh
);
1526 BUG_ON(cn
->blocknr
!= saved_bh
->b_blocknr
);
1527 if (buffer_dirty(saved_bh
))
1528 submit_logged_buffer(saved_bh
);
1530 unlock_buffer(saved_bh
);
1534 "clm-2082: Unable to flush buffer %llu in %s",
1535 (unsigned long long)saved_bh
->
1536 b_blocknr
, __FUNCTION__
);
1542 /* we incremented this to keep others from taking the buffer head away */
1544 if (atomic_read(&(saved_bh
->b_count
)) < 0) {
1546 "journal-945: saved_bh->b_count < 0");
1551 cn
= jl
->j_realblock
;
1553 if (test_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
)) {
1556 "journal-1011: cn->bh is NULL\n");
1558 wait_on_buffer(cn
->bh
);
1561 "journal-1012: cn->bh is NULL\n");
1563 if (unlikely(!buffer_uptodate(cn
->bh
))) {
1564 #ifdef CONFIG_REISERFS_CHECK
1566 "journal-949: buffer write failed\n");
1570 /* note, we must clear the JDirty_wait bit after the up to date
1571 ** check, otherwise we race against our flushpage routine
1573 BUG_ON(!test_clear_buffer_journal_dirty
1576 /* drop one ref for us */
1578 /* drop one ref for journal_mark_dirty */
1579 release_buffer_page(cn
->bh
);
1586 reiserfs_abort(s
, -EIO
,
1587 "Write error while pushing transaction to disk in %s",
1589 flush_older_and_return
:
1591 /* before we can update the journal header block, we _must_ flush all
1592 ** real blocks from all older transactions to disk. This is because
1593 ** once the header block is updated, this transaction will not be
1594 ** replayed after a crash
1597 flush_older_journal_lists(s
, jl
);
1600 err
= journal
->j_errno
;
1601 /* before we can remove everything from the hash tables for this
1602 ** transaction, we must make sure it can never be replayed
1604 ** since we are only called from do_journal_end, we know for sure there
1605 ** are no allocations going on while we are flushing journal lists. So,
1606 ** we only need to update the journal header block for the last list
1609 if (!err
&& flushall
) {
1611 update_journal_header_block(s
,
1612 (jl
->j_start
+ jl
->j_len
+
1613 2) % SB_ONDISK_JOURNAL_SIZE(s
),
1616 reiserfs_abort(s
, -EIO
,
1617 "Write error while updating journal header in %s",
1620 remove_all_from_journal_list(s
, jl
, 0);
1621 list_del_init(&jl
->j_list
);
1622 journal
->j_num_lists
--;
1623 del_from_work_list(s
, jl
);
1625 if (journal
->j_last_flush_id
!= 0 &&
1626 (jl
->j_trans_id
- journal
->j_last_flush_id
) != 1) {
1627 reiserfs_warning(s
, "clm-2201: last flush %lu, current %lu",
1628 journal
->j_last_flush_id
, jl
->j_trans_id
);
1630 journal
->j_last_flush_id
= jl
->j_trans_id
;
1632 /* not strictly required since we are freeing the list, but it should
1633 * help find code using dead lists later on
1636 atomic_set(&(jl
->j_nonzerolen
), 0);
1638 jl
->j_realblock
= NULL
;
1639 jl
->j_commit_bh
= NULL
;
1642 put_journal_list(s
, jl
);
1644 up(&journal
->j_flush_sem
);
1649 static int test_transaction(struct super_block
*s
,
1650 struct reiserfs_journal_list
*jl
)
1652 struct reiserfs_journal_cnode
*cn
;
1654 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0)
1657 cn
= jl
->j_realblock
;
1659 /* if the blocknr == 0, this has been cleared from the hash,
1662 if (cn
->blocknr
== 0) {
1665 if (cn
->bh
&& !newer_jl_done(cn
))
1674 static int write_one_transaction(struct super_block
*s
,
1675 struct reiserfs_journal_list
*jl
,
1676 struct buffer_chunk
*chunk
)
1678 struct reiserfs_journal_cnode
*cn
;
1681 jl
->j_state
|= LIST_TOUCHED
;
1682 del_from_work_list(s
, jl
);
1683 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0) {
1687 cn
= jl
->j_realblock
;
1689 /* if the blocknr == 0, this has been cleared from the hash,
1692 if (cn
->blocknr
== 0) {
1695 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(cn
->bh
)) {
1696 struct buffer_head
*tmp_bh
;
1697 /* we can race against journal_mark_freed when we try
1698 * to lock_buffer(cn->bh), so we have to inc the buffer
1699 * count, and recheck things after locking
1703 lock_buffer(tmp_bh
);
1704 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(tmp_bh
)) {
1705 if (!buffer_journal_dirty(tmp_bh
) ||
1706 buffer_journal_prepared(tmp_bh
))
1708 add_to_chunk(chunk
, tmp_bh
, NULL
, write_chunk
);
1711 /* note, cn->bh might be null now */
1712 unlock_buffer(tmp_bh
);
1723 /* used by flush_commit_list */
1724 static int dirty_one_transaction(struct super_block
*s
,
1725 struct reiserfs_journal_list
*jl
)
1727 struct reiserfs_journal_cnode
*cn
;
1728 struct reiserfs_journal_list
*pjl
;
1731 jl
->j_state
|= LIST_DIRTY
;
1732 cn
= jl
->j_realblock
;
1734 /* look for a more recent transaction that logged this
1735 ** buffer. Only the most recent transaction with a buffer in
1736 ** it is allowed to send that buffer to disk
1738 pjl
= find_newer_jl_for_cn(cn
);
1739 if (!pjl
&& cn
->blocknr
&& cn
->bh
1740 && buffer_journal_dirty(cn
->bh
)) {
1741 BUG_ON(!can_dirty(cn
));
1742 /* if the buffer is prepared, it will either be logged
1743 * or restored. If restored, we need to make sure
1744 * it actually gets marked dirty
1746 clear_buffer_journal_new(cn
->bh
);
1747 if (buffer_journal_prepared(cn
->bh
)) {
1748 set_buffer_journal_restore_dirty(cn
->bh
);
1750 set_buffer_journal_test(cn
->bh
);
1751 mark_buffer_dirty(cn
->bh
);
1759 static int kupdate_transactions(struct super_block
*s
,
1760 struct reiserfs_journal_list
*jl
,
1761 struct reiserfs_journal_list
**next_jl
,
1762 unsigned long *next_trans_id
,
1763 int num_blocks
, int num_trans
)
1767 int transactions_flushed
= 0;
1768 unsigned long orig_trans_id
= jl
->j_trans_id
;
1769 struct buffer_chunk chunk
;
1770 struct list_head
*entry
;
1771 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1774 down(&journal
->j_flush_sem
);
1775 if (!journal_list_still_alive(s
, orig_trans_id
)) {
1779 /* we've got j_flush_sem held, nobody is going to delete any
1780 * of these lists out from underneath us
1782 while ((num_trans
&& transactions_flushed
< num_trans
) ||
1783 (!num_trans
&& written
< num_blocks
)) {
1785 if (jl
->j_len
== 0 || (jl
->j_state
& LIST_TOUCHED
) ||
1786 atomic_read(&jl
->j_commit_left
)
1787 || !(jl
->j_state
& LIST_DIRTY
)) {
1788 del_from_work_list(s
, jl
);
1791 ret
= write_one_transaction(s
, jl
, &chunk
);
1795 transactions_flushed
++;
1797 entry
= jl
->j_list
.next
;
1800 if (entry
== &journal
->j_journal_list
) {
1803 jl
= JOURNAL_LIST_ENTRY(entry
);
1805 /* don't bother with older transactions */
1806 if (jl
->j_trans_id
<= orig_trans_id
)
1810 write_chunk(&chunk
);
1814 up(&journal
->j_flush_sem
);
1818 /* for o_sync and fsync heavy applications, they tend to use
1819 ** all the journa list slots with tiny transactions. These
1820 ** trigger lots and lots of calls to update the header block, which
1821 ** adds seeks and slows things down.
1823 ** This function tries to clear out a large chunk of the journal lists
1824 ** at once, which makes everything faster since only the newest journal
1825 ** list updates the header block
1827 static int flush_used_journal_lists(struct super_block
*s
,
1828 struct reiserfs_journal_list
*jl
)
1830 unsigned long len
= 0;
1831 unsigned long cur_len
;
1835 struct reiserfs_journal_list
*tjl
;
1836 struct reiserfs_journal_list
*flush_jl
;
1837 unsigned long trans_id
;
1838 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1840 flush_jl
= tjl
= jl
;
1842 /* in data logging mode, try harder to flush a lot of blocks */
1843 if (reiserfs_data_log(s
))
1845 /* flush for 256 transactions or limit blocks, whichever comes first */
1846 for (i
= 0; i
< 256 && len
< limit
; i
++) {
1847 if (atomic_read(&tjl
->j_commit_left
) ||
1848 tjl
->j_trans_id
< jl
->j_trans_id
) {
1851 cur_len
= atomic_read(&tjl
->j_nonzerolen
);
1853 tjl
->j_state
&= ~LIST_TOUCHED
;
1857 if (tjl
->j_list
.next
== &journal
->j_journal_list
)
1859 tjl
= JOURNAL_LIST_ENTRY(tjl
->j_list
.next
);
1861 /* try to find a group of blocks we can flush across all the
1862 ** transactions, but only bother if we've actually spanned
1863 ** across multiple lists
1865 if (flush_jl
!= jl
) {
1866 ret
= kupdate_transactions(s
, jl
, &tjl
, &trans_id
, len
, i
);
1868 flush_journal_list(s
, flush_jl
, 1);
1873 ** removes any nodes in table with name block and dev as bh.
1874 ** only touchs the hnext and hprev pointers.
1876 void remove_journal_hash(struct super_block
*sb
,
1877 struct reiserfs_journal_cnode
**table
,
1878 struct reiserfs_journal_list
*jl
,
1879 unsigned long block
, int remove_freed
)
1881 struct reiserfs_journal_cnode
*cur
;
1882 struct reiserfs_journal_cnode
**head
;
1884 head
= &(journal_hash(table
, sb
, block
));
1890 if (cur
->blocknr
== block
&& cur
->sb
== sb
1891 && (jl
== NULL
|| jl
== cur
->jlist
)
1892 && (!test_bit(BLOCK_FREED
, &cur
->state
) || remove_freed
)) {
1894 cur
->hnext
->hprev
= cur
->hprev
;
1897 cur
->hprev
->hnext
= cur
->hnext
;
1904 if (cur
->bh
&& cur
->jlist
) /* anybody who clears the cur->bh will also dec the nonzerolen */
1905 atomic_dec(&(cur
->jlist
->j_nonzerolen
));
1913 static void free_journal_ram(struct super_block
*p_s_sb
)
1915 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1916 kfree(journal
->j_current_jl
);
1917 journal
->j_num_lists
--;
1919 vfree(journal
->j_cnode_free_orig
);
1920 free_list_bitmaps(p_s_sb
, journal
->j_list_bitmap
);
1921 free_bitmap_nodes(p_s_sb
); /* must be after free_list_bitmaps */
1922 if (journal
->j_header_bh
) {
1923 brelse(journal
->j_header_bh
);
1925 /* j_header_bh is on the journal dev, make sure not to release the journal
1926 * dev until we brelse j_header_bh
1928 release_journal_dev(p_s_sb
, journal
);
1933 ** call on unmount. Only set error to 1 if you haven't made your way out
1934 ** of read_super() yet. Any other caller must keep error at 0.
1936 static int do_journal_release(struct reiserfs_transaction_handle
*th
,
1937 struct super_block
*p_s_sb
, int error
)
1939 struct reiserfs_transaction_handle myth
;
1941 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1943 /* we only want to flush out transactions if we were called with error == 0
1945 if (!error
&& !(p_s_sb
->s_flags
& MS_RDONLY
)) {
1946 /* end the current trans */
1947 BUG_ON(!th
->t_trans_id
);
1948 do_journal_end(th
, p_s_sb
, 10, FLUSH_ALL
);
1950 /* make sure something gets logged to force our way into the flush code */
1951 if (!journal_join(&myth
, p_s_sb
, 1)) {
1952 reiserfs_prepare_for_journal(p_s_sb
,
1953 SB_BUFFER_WITH_SB(p_s_sb
),
1955 journal_mark_dirty(&myth
, p_s_sb
,
1956 SB_BUFFER_WITH_SB(p_s_sb
));
1957 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1962 /* this also catches errors during the do_journal_end above */
1963 if (!error
&& reiserfs_is_journal_aborted(journal
)) {
1964 memset(&myth
, 0, sizeof(myth
));
1965 if (!journal_join_abort(&myth
, p_s_sb
, 1)) {
1966 reiserfs_prepare_for_journal(p_s_sb
,
1967 SB_BUFFER_WITH_SB(p_s_sb
),
1969 journal_mark_dirty(&myth
, p_s_sb
,
1970 SB_BUFFER_WITH_SB(p_s_sb
));
1971 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1975 reiserfs_mounted_fs_count
--;
1976 /* wait for all commits to finish */
1977 cancel_delayed_work(&SB_JOURNAL(p_s_sb
)->j_work
);
1978 flush_workqueue(commit_wq
);
1979 if (!reiserfs_mounted_fs_count
) {
1980 destroy_workqueue(commit_wq
);
1984 free_journal_ram(p_s_sb
);
1990 ** call on unmount. flush all journal trans, release all alloc'd ram
1992 int journal_release(struct reiserfs_transaction_handle
*th
,
1993 struct super_block
*p_s_sb
)
1995 return do_journal_release(th
, p_s_sb
, 0);
1999 ** only call from an error condition inside reiserfs_read_super!
2001 int journal_release_error(struct reiserfs_transaction_handle
*th
,
2002 struct super_block
*p_s_sb
)
2004 return do_journal_release(th
, p_s_sb
, 1);
2007 /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */
2008 static int journal_compare_desc_commit(struct super_block
*p_s_sb
,
2009 struct reiserfs_journal_desc
*desc
,
2010 struct reiserfs_journal_commit
*commit
)
2012 if (get_commit_trans_id(commit
) != get_desc_trans_id(desc
) ||
2013 get_commit_trans_len(commit
) != get_desc_trans_len(desc
) ||
2014 get_commit_trans_len(commit
) > SB_JOURNAL(p_s_sb
)->j_trans_max
||
2015 get_commit_trans_len(commit
) <= 0) {
2021 /* returns 0 if it did not find a description block
2022 ** returns -1 if it found a corrupt commit block
2023 ** returns 1 if both desc and commit were valid
2025 static int journal_transaction_is_valid(struct super_block
*p_s_sb
,
2026 struct buffer_head
*d_bh
,
2027 unsigned long *oldest_invalid_trans_id
,
2028 unsigned long *newest_mount_id
)
2030 struct reiserfs_journal_desc
*desc
;
2031 struct reiserfs_journal_commit
*commit
;
2032 struct buffer_head
*c_bh
;
2033 unsigned long offset
;
2038 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2039 if (get_desc_trans_len(desc
) > 0
2040 && !memcmp(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8)) {
2041 if (oldest_invalid_trans_id
&& *oldest_invalid_trans_id
2042 && get_desc_trans_id(desc
) > *oldest_invalid_trans_id
) {
2043 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2044 "journal-986: transaction "
2045 "is valid returning because trans_id %d is greater than "
2046 "oldest_invalid %lu",
2047 get_desc_trans_id(desc
),
2048 *oldest_invalid_trans_id
);
2052 && *newest_mount_id
> get_desc_mount_id(desc
)) {
2053 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2054 "journal-1087: transaction "
2055 "is valid returning because mount_id %d is less than "
2056 "newest_mount_id %lu",
2057 get_desc_mount_id(desc
),
2061 if (get_desc_trans_len(desc
) > SB_JOURNAL(p_s_sb
)->j_trans_max
) {
2062 reiserfs_warning(p_s_sb
,
2063 "journal-2018: Bad transaction length %d encountered, ignoring transaction",
2064 get_desc_trans_len(desc
));
2067 offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2069 /* ok, we have a journal description block, lets see if the transaction was valid */
2071 journal_bread(p_s_sb
,
2072 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2073 ((offset
+ get_desc_trans_len(desc
) +
2074 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2077 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2078 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2079 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2080 "journal_transaction_is_valid, commit offset %ld had bad "
2081 "time %d or length %d",
2083 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2084 get_commit_trans_id(commit
),
2085 get_commit_trans_len(commit
));
2087 if (oldest_invalid_trans_id
) {
2088 *oldest_invalid_trans_id
=
2089 get_desc_trans_id(desc
);
2090 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2092 "transaction_is_valid setting oldest invalid trans_id "
2094 get_desc_trans_id(desc
));
2099 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2100 "journal-1006: found valid "
2101 "transaction start offset %llu, len %d id %d",
2103 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2104 get_desc_trans_len(desc
),
2105 get_desc_trans_id(desc
));
2112 static void brelse_array(struct buffer_head
**heads
, int num
)
2115 for (i
= 0; i
< num
; i
++) {
2121 ** given the start, and values for the oldest acceptable transactions,
2122 ** this either reads in a replays a transaction, or returns because the transaction
2123 ** is invalid, or too old.
2125 static int journal_read_transaction(struct super_block
*p_s_sb
,
2126 unsigned long cur_dblock
,
2127 unsigned long oldest_start
,
2128 unsigned long oldest_trans_id
,
2129 unsigned long newest_mount_id
)
2131 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2132 struct reiserfs_journal_desc
*desc
;
2133 struct reiserfs_journal_commit
*commit
;
2134 unsigned long trans_id
= 0;
2135 struct buffer_head
*c_bh
;
2136 struct buffer_head
*d_bh
;
2137 struct buffer_head
**log_blocks
= NULL
;
2138 struct buffer_head
**real_blocks
= NULL
;
2139 unsigned long trans_offset
;
2143 d_bh
= journal_bread(p_s_sb
, cur_dblock
);
2146 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2147 trans_offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2148 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1037: "
2149 "journal_read_transaction, offset %llu, len %d mount_id %d",
2150 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2151 get_desc_trans_len(desc
), get_desc_mount_id(desc
));
2152 if (get_desc_trans_id(desc
) < oldest_trans_id
) {
2153 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1039: "
2154 "journal_read_trans skipping because %lu is too old",
2156 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2160 if (get_desc_mount_id(desc
) != newest_mount_id
) {
2161 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1146: "
2162 "journal_read_trans skipping because %d is != "
2163 "newest_mount_id %lu", get_desc_mount_id(desc
),
2168 c_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2169 ((trans_offset
+ get_desc_trans_len(desc
) + 1) %
2170 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2175 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2176 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2177 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2178 "journal_read_transaction, "
2179 "commit offset %llu had bad time %d or length %d",
2181 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2182 get_commit_trans_id(commit
),
2183 get_commit_trans_len(commit
));
2188 trans_id
= get_desc_trans_id(desc
);
2189 /* now we know we've got a good transaction, and it was inside the valid time ranges */
2190 log_blocks
= kmalloc(get_desc_trans_len(desc
) *
2191 sizeof(struct buffer_head
*), GFP_NOFS
);
2192 real_blocks
= kmalloc(get_desc_trans_len(desc
) *
2193 sizeof(struct buffer_head
*), GFP_NOFS
);
2194 if (!log_blocks
|| !real_blocks
) {
2199 reiserfs_warning(p_s_sb
,
2200 "journal-1169: kmalloc failed, unable to mount FS");
2203 /* get all the buffer heads */
2204 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
2205 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2207 journal_getblk(p_s_sb
,
2208 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2210 i
) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2211 if (i
< trans_half
) {
2214 le32_to_cpu(desc
->j_realblock
[i
]));
2218 le32_to_cpu(commit
->
2219 j_realblock
[i
- trans_half
]));
2221 if (real_blocks
[i
]->b_blocknr
> SB_BLOCK_COUNT(p_s_sb
)) {
2222 reiserfs_warning(p_s_sb
,
2223 "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
2226 /* make sure we don't try to replay onto log or reserved area */
2227 if (is_block_in_log_or_reserved_area
2228 (p_s_sb
, real_blocks
[i
]->b_blocknr
)) {
2229 reiserfs_warning(p_s_sb
,
2230 "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block");
2232 brelse_array(log_blocks
, i
);
2233 brelse_array(real_blocks
, i
);
2241 /* read in the log blocks, memcpy to the corresponding real block */
2242 ll_rw_block(READ
, get_desc_trans_len(desc
), log_blocks
);
2243 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2244 wait_on_buffer(log_blocks
[i
]);
2245 if (!buffer_uptodate(log_blocks
[i
])) {
2246 reiserfs_warning(p_s_sb
,
2247 "journal-1212: REPLAY FAILURE fsck required! buffer write failed");
2248 brelse_array(log_blocks
+ i
,
2249 get_desc_trans_len(desc
) - i
);
2250 brelse_array(real_blocks
, get_desc_trans_len(desc
));
2257 memcpy(real_blocks
[i
]->b_data
, log_blocks
[i
]->b_data
,
2258 real_blocks
[i
]->b_size
);
2259 set_buffer_uptodate(real_blocks
[i
]);
2260 brelse(log_blocks
[i
]);
2262 /* flush out the real blocks */
2263 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2264 set_buffer_dirty(real_blocks
[i
]);
2265 ll_rw_block(SWRITE
, 1, real_blocks
+ i
);
2267 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2268 wait_on_buffer(real_blocks
[i
]);
2269 if (!buffer_uptodate(real_blocks
[i
])) {
2270 reiserfs_warning(p_s_sb
,
2271 "journal-1226: REPLAY FAILURE, fsck required! buffer write failed");
2272 brelse_array(real_blocks
+ i
,
2273 get_desc_trans_len(desc
) - i
);
2280 brelse(real_blocks
[i
]);
2283 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2284 ((trans_offset
+ get_desc_trans_len(desc
) +
2285 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2286 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2287 "journal-1095: setting journal " "start to offset %ld",
2288 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2290 /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
2291 journal
->j_start
= cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2292 journal
->j_last_flush_trans_id
= trans_id
;
2293 journal
->j_trans_id
= trans_id
+ 1;
2294 /* check for trans_id overflow */
2295 if (journal
->j_trans_id
== 0)
2296 journal
->j_trans_id
= 10;
2304 /* This function reads blocks starting from block and to max_block of bufsize
2305 size (but no more than BUFNR blocks at a time). This proved to improve
2306 mounting speed on self-rebuilding raid5 arrays at least.
2307 Right now it is only used from journal code. But later we might use it
2309 Note: Do not use journal_getblk/sb_getblk functions here! */
2310 static struct buffer_head
*reiserfs_breada(struct block_device
*dev
, int block
,
2311 int bufsize
, unsigned int max_block
)
2313 struct buffer_head
*bhlist
[BUFNR
];
2314 unsigned int blocks
= BUFNR
;
2315 struct buffer_head
*bh
;
2318 bh
= __getblk(dev
, block
, bufsize
);
2319 if (buffer_uptodate(bh
))
2322 if (block
+ BUFNR
> max_block
) {
2323 blocks
= max_block
- block
;
2327 for (i
= 1; i
< blocks
; i
++) {
2328 bh
= __getblk(dev
, block
+ i
, bufsize
);
2329 if (buffer_uptodate(bh
)) {
2335 ll_rw_block(READ
, j
, bhlist
);
2336 for (i
= 1; i
< j
; i
++)
2340 if (buffer_uptodate(bh
))
2347 ** read and replay the log
2348 ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
2349 ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast.
2351 ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
2353 ** On exit, it sets things up so the first transaction will work correctly.
2355 static int journal_read(struct super_block
*p_s_sb
)
2357 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2358 struct reiserfs_journal_desc
*desc
;
2359 unsigned long oldest_trans_id
= 0;
2360 unsigned long oldest_invalid_trans_id
= 0;
2362 unsigned long oldest_start
= 0;
2363 unsigned long cur_dblock
= 0;
2364 unsigned long newest_mount_id
= 9;
2365 struct buffer_head
*d_bh
;
2366 struct reiserfs_journal_header
*jh
;
2367 int valid_journal_header
= 0;
2368 int replay_count
= 0;
2369 int continue_replay
= 1;
2371 char b
[BDEVNAME_SIZE
];
2373 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2374 reiserfs_info(p_s_sb
, "checking transaction log (%s)\n",
2375 bdevname(journal
->j_dev_bd
, b
));
2376 start
= get_seconds();
2378 /* step 1, read in the journal header block. Check the transaction it says
2379 ** is the first unflushed, and if that transaction is not valid,
2382 journal
->j_header_bh
= journal_bread(p_s_sb
,
2383 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
)
2384 + SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2385 if (!journal
->j_header_bh
) {
2388 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
);
2389 if (le32_to_cpu(jh
->j_first_unflushed_offset
) <
2390 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)
2391 && le32_to_cpu(jh
->j_last_flush_trans_id
) > 0) {
2393 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2394 le32_to_cpu(jh
->j_first_unflushed_offset
);
2395 oldest_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2396 newest_mount_id
= le32_to_cpu(jh
->j_mount_id
);
2397 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2398 "journal-1153: found in "
2399 "header: first_unflushed_offset %d, last_flushed_trans_id "
2400 "%lu", le32_to_cpu(jh
->j_first_unflushed_offset
),
2401 le32_to_cpu(jh
->j_last_flush_trans_id
));
2402 valid_journal_header
= 1;
2404 /* now, we try to read the first unflushed offset. If it is not valid,
2405 ** there is nothing more we can do, and it makes no sense to read
2406 ** through the whole log.
2409 journal_bread(p_s_sb
,
2410 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2411 le32_to_cpu(jh
->j_first_unflushed_offset
));
2412 ret
= journal_transaction_is_valid(p_s_sb
, d_bh
, NULL
, NULL
);
2414 continue_replay
= 0;
2417 goto start_log_replay
;
2420 if (continue_replay
&& bdev_read_only(p_s_sb
->s_bdev
)) {
2421 reiserfs_warning(p_s_sb
,
2422 "clm-2076: device is readonly, unable to replay log");
2426 /* ok, there are transactions that need to be replayed. start with the first log block, find
2427 ** all the valid transactions, and pick out the oldest.
2429 while (continue_replay
2431 (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2432 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) {
2433 /* Note that it is required for blocksize of primary fs device and journal
2434 device to be the same */
2436 reiserfs_breada(journal
->j_dev_bd
, cur_dblock
,
2437 p_s_sb
->s_blocksize
,
2438 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2439 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2441 journal_transaction_is_valid(p_s_sb
, d_bh
,
2442 &oldest_invalid_trans_id
,
2445 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2446 if (oldest_start
== 0) { /* init all oldest_ values */
2447 oldest_trans_id
= get_desc_trans_id(desc
);
2448 oldest_start
= d_bh
->b_blocknr
;
2449 newest_mount_id
= get_desc_mount_id(desc
);
2450 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2451 "journal-1179: Setting "
2452 "oldest_start to offset %llu, trans_id %lu",
2454 SB_ONDISK_JOURNAL_1st_BLOCK
2455 (p_s_sb
), oldest_trans_id
);
2456 } else if (oldest_trans_id
> get_desc_trans_id(desc
)) {
2457 /* one we just read was older */
2458 oldest_trans_id
= get_desc_trans_id(desc
);
2459 oldest_start
= d_bh
->b_blocknr
;
2460 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2461 "journal-1180: Resetting "
2462 "oldest_start to offset %lu, trans_id %lu",
2464 SB_ONDISK_JOURNAL_1st_BLOCK
2465 (p_s_sb
), oldest_trans_id
);
2467 if (newest_mount_id
< get_desc_mount_id(desc
)) {
2468 newest_mount_id
= get_desc_mount_id(desc
);
2469 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2470 "journal-1299: Setting "
2471 "newest_mount_id to %d",
2472 get_desc_mount_id(desc
));
2474 cur_dblock
+= get_desc_trans_len(desc
) + 2;
2482 cur_dblock
= oldest_start
;
2483 if (oldest_trans_id
) {
2484 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2485 "journal-1206: Starting replay "
2486 "from offset %llu, trans_id %lu",
2487 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2492 while (continue_replay
&& oldest_trans_id
> 0) {
2494 journal_read_transaction(p_s_sb
, cur_dblock
, oldest_start
,
2495 oldest_trans_id
, newest_mount_id
);
2498 } else if (ret
!= 0) {
2502 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + journal
->j_start
;
2504 if (cur_dblock
== oldest_start
)
2508 if (oldest_trans_id
== 0) {
2509 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2510 "journal-1225: No valid " "transactions found");
2512 /* j_start does not get set correctly if we don't replay any transactions.
2513 ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
2514 ** copy the trans_id from the header
2516 if (valid_journal_header
&& replay_count
== 0) {
2517 journal
->j_start
= le32_to_cpu(jh
->j_first_unflushed_offset
);
2518 journal
->j_trans_id
=
2519 le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2520 /* check for trans_id overflow */
2521 if (journal
->j_trans_id
== 0)
2522 journal
->j_trans_id
= 10;
2523 journal
->j_last_flush_trans_id
=
2524 le32_to_cpu(jh
->j_last_flush_trans_id
);
2525 journal
->j_mount_id
= le32_to_cpu(jh
->j_mount_id
) + 1;
2527 journal
->j_mount_id
= newest_mount_id
+ 1;
2529 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2530 "newest_mount_id to %lu", journal
->j_mount_id
);
2531 journal
->j_first_unflushed_offset
= journal
->j_start
;
2532 if (replay_count
> 0) {
2533 reiserfs_info(p_s_sb
,
2534 "replayed %d transactions in %lu seconds\n",
2535 replay_count
, get_seconds() - start
);
2537 if (!bdev_read_only(p_s_sb
->s_bdev
) &&
2538 _update_journal_header_block(p_s_sb
, journal
->j_start
,
2539 journal
->j_last_flush_trans_id
)) {
2540 /* replay failed, caller must call free_journal_ram and abort
2548 static struct reiserfs_journal_list
*alloc_journal_list(struct super_block
*s
)
2550 struct reiserfs_journal_list
*jl
;
2551 jl
= kzalloc(sizeof(struct reiserfs_journal_list
),
2552 GFP_NOFS
| __GFP_NOFAIL
);
2553 INIT_LIST_HEAD(&jl
->j_list
);
2554 INIT_LIST_HEAD(&jl
->j_working_list
);
2555 INIT_LIST_HEAD(&jl
->j_tail_bh_list
);
2556 INIT_LIST_HEAD(&jl
->j_bh_list
);
2557 sema_init(&jl
->j_commit_lock
, 1);
2558 SB_JOURNAL(s
)->j_num_lists
++;
2559 get_journal_list(jl
);
2563 static void journal_list_init(struct super_block
*p_s_sb
)
2565 SB_JOURNAL(p_s_sb
)->j_current_jl
= alloc_journal_list(p_s_sb
);
2568 static int release_journal_dev(struct super_block
*super
,
2569 struct reiserfs_journal
*journal
)
2575 if (journal
->j_dev_file
!= NULL
) {
2576 result
= filp_close(journal
->j_dev_file
, NULL
);
2577 journal
->j_dev_file
= NULL
;
2578 journal
->j_dev_bd
= NULL
;
2579 } else if (journal
->j_dev_bd
!= NULL
) {
2580 result
= blkdev_put(journal
->j_dev_bd
);
2581 journal
->j_dev_bd
= NULL
;
2585 reiserfs_warning(super
,
2586 "sh-457: release_journal_dev: Cannot release journal device: %i",
2592 static int journal_init_dev(struct super_block
*super
,
2593 struct reiserfs_journal
*journal
,
2594 const char *jdev_name
)
2598 int blkdev_mode
= FMODE_READ
| FMODE_WRITE
;
2599 char b
[BDEVNAME_SIZE
];
2603 journal
->j_dev_bd
= NULL
;
2604 journal
->j_dev_file
= NULL
;
2605 jdev
= SB_ONDISK_JOURNAL_DEVICE(super
) ?
2606 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super
)) : super
->s_dev
;
2608 if (bdev_read_only(super
->s_bdev
))
2609 blkdev_mode
= FMODE_READ
;
2611 /* there is no "jdev" option and journal is on separate device */
2612 if ((!jdev_name
|| !jdev_name
[0])) {
2613 journal
->j_dev_bd
= open_by_devnum(jdev
, blkdev_mode
);
2614 if (IS_ERR(journal
->j_dev_bd
)) {
2615 result
= PTR_ERR(journal
->j_dev_bd
);
2616 journal
->j_dev_bd
= NULL
;
2617 reiserfs_warning(super
, "sh-458: journal_init_dev: "
2618 "cannot init journal device '%s': %i",
2619 __bdevname(jdev
, b
), result
);
2621 } else if (jdev
!= super
->s_dev
)
2622 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2626 journal
->j_dev_file
= filp_open(jdev_name
, 0, 0);
2627 if (!IS_ERR(journal
->j_dev_file
)) {
2628 struct inode
*jdev_inode
= journal
->j_dev_file
->f_mapping
->host
;
2629 if (!S_ISBLK(jdev_inode
->i_mode
)) {
2630 reiserfs_warning(super
, "journal_init_dev: '%s' is "
2631 "not a block device", jdev_name
);
2633 release_journal_dev(super
, journal
);
2636 journal
->j_dev_bd
= I_BDEV(jdev_inode
);
2637 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2638 reiserfs_info(super
,
2639 "journal_init_dev: journal device: %s\n",
2640 bdevname(journal
->j_dev_bd
, b
));
2643 result
= PTR_ERR(journal
->j_dev_file
);
2644 journal
->j_dev_file
= NULL
;
2645 reiserfs_warning(super
,
2646 "journal_init_dev: Cannot open '%s': %i",
2653 * When creating/tuning a file system user can assign some
2654 * journal params within boundaries which depend on the ratio
2655 * blocksize/standard_blocksize.
2657 * For blocks >= standard_blocksize transaction size should
2658 * be not less then JOURNAL_TRANS_MIN_DEFAULT, and not more
2659 * then JOURNAL_TRANS_MAX_DEFAULT.
2661 * For blocks < standard_blocksize these boundaries should be
2662 * decreased proportionally.
2664 #define REISERFS_STANDARD_BLKSIZE (4096)
2666 static int check_advise_trans_params(struct super_block
*p_s_sb
,
2667 struct reiserfs_journal
*journal
)
2669 if (journal
->j_trans_max
) {
2670 /* Non-default journal params.
2671 Do sanity check for them. */
2673 if (p_s_sb
->s_blocksize
< REISERFS_STANDARD_BLKSIZE
)
2674 ratio
= REISERFS_STANDARD_BLKSIZE
/ p_s_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(p_s_sb
) / journal
->j_trans_max
<
2679 JOURNAL_MIN_RATIO
) {
2680 reiserfs_warning(p_s_sb
,
2681 "sh-462: bad transaction max size (%u). FSCK?",
2682 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(p_s_sb
,
2688 "sh-463: bad transaction max batch (%u). FSCK?",
2689 journal
->j_max_batch
);
2693 /* Default journal params.
2694 The file system was created by old version
2695 of mkreiserfs, so some fields contain zeros,
2696 and we need to advise proper values for them */
2697 if (p_s_sb
->s_blocksize
!= REISERFS_STANDARD_BLKSIZE
)
2698 reiserfs_panic(p_s_sb
, "sh-464: bad blocksize (%u)",
2699 p_s_sb
->s_blocksize
);
2700 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
;
2701 journal
->j_max_batch
= JOURNAL_MAX_BATCH_DEFAULT
;
2702 journal
->j_max_commit_age
= JOURNAL_MAX_COMMIT_AGE
;
2708 ** must be called once on fs mount. calls journal_read for you
2710 int journal_init(struct super_block
*p_s_sb
, const char *j_dev_name
,
2711 int old_format
, unsigned int commit_max_age
)
2713 int num_cnodes
= SB_ONDISK_JOURNAL_SIZE(p_s_sb
) * 2;
2714 struct buffer_head
*bhjh
;
2715 struct reiserfs_super_block
*rs
;
2716 struct reiserfs_journal_header
*jh
;
2717 struct reiserfs_journal
*journal
;
2718 struct reiserfs_journal_list
*jl
;
2719 char b
[BDEVNAME_SIZE
];
2721 journal
= SB_JOURNAL(p_s_sb
) = vmalloc(sizeof(struct reiserfs_journal
));
2723 reiserfs_warning(p_s_sb
,
2724 "journal-1256: unable to get memory for journal structure");
2727 memset(journal
, 0, sizeof(struct reiserfs_journal
));
2728 INIT_LIST_HEAD(&journal
->j_bitmap_nodes
);
2729 INIT_LIST_HEAD(&journal
->j_prealloc_list
);
2730 INIT_LIST_HEAD(&journal
->j_working_list
);
2731 INIT_LIST_HEAD(&journal
->j_journal_list
);
2732 journal
->j_persistent_trans
= 0;
2733 if (reiserfs_allocate_list_bitmaps(p_s_sb
,
2734 journal
->j_list_bitmap
,
2735 SB_BMAP_NR(p_s_sb
)))
2736 goto free_and_return
;
2737 allocate_bitmap_nodes(p_s_sb
);
2739 /* reserved for journal area support */
2740 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) = (old_format
?
2741 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2742 / p_s_sb
->s_blocksize
+
2743 SB_BMAP_NR(p_s_sb
) +
2745 REISERFS_DISK_OFFSET_IN_BYTES
/
2746 p_s_sb
->s_blocksize
+ 2);
2748 /* Sanity check to see is the standard journal fitting withing first bitmap
2749 (actual for small blocksizes) */
2750 if (!SB_ONDISK_JOURNAL_DEVICE(p_s_sb
) &&
2751 (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) +
2752 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) > p_s_sb
->s_blocksize
* 8)) {
2753 reiserfs_warning(p_s_sb
,
2754 "journal-1393: journal does not fit for area "
2755 "addressed by first of bitmap blocks. It starts at "
2756 "%u and its size is %u. Block size %ld",
2757 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
),
2758 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2759 p_s_sb
->s_blocksize
);
2760 goto free_and_return
;
2763 if (journal_init_dev(p_s_sb
, journal
, j_dev_name
) != 0) {
2764 reiserfs_warning(p_s_sb
,
2765 "sh-462: unable to initialize jornal device");
2766 goto free_and_return
;
2769 rs
= SB_DISK_SUPER_BLOCK(p_s_sb
);
2771 /* read journal header */
2772 bhjh
= journal_bread(p_s_sb
,
2773 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2774 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2776 reiserfs_warning(p_s_sb
,
2777 "sh-459: unable to read journal header");
2778 goto free_and_return
;
2780 jh
= (struct reiserfs_journal_header
*)(bhjh
->b_data
);
2782 /* make sure that journal matches to the super block */
2783 if (is_reiserfs_jr(rs
)
2784 && (le32_to_cpu(jh
->jh_journal
.jp_journal_magic
) !=
2785 sb_jp_journal_magic(rs
))) {
2786 reiserfs_warning(p_s_sb
,
2787 "sh-460: journal header magic %x "
2788 "(device %s) does not match to magic found in super "
2789 "block %x", jh
->jh_journal
.jp_journal_magic
,
2790 bdevname(journal
->j_dev_bd
, b
),
2791 sb_jp_journal_magic(rs
));
2793 goto free_and_return
;
2796 journal
->j_trans_max
= le32_to_cpu(jh
->jh_journal
.jp_journal_trans_max
);
2797 journal
->j_max_batch
= le32_to_cpu(jh
->jh_journal
.jp_journal_max_batch
);
2798 journal
->j_max_commit_age
=
2799 le32_to_cpu(jh
->jh_journal
.jp_journal_max_commit_age
);
2800 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
2802 if (check_advise_trans_params(p_s_sb
, journal
) != 0)
2803 goto free_and_return
;
2804 journal
->j_default_max_commit_age
= journal
->j_max_commit_age
;
2806 if (commit_max_age
!= 0) {
2807 journal
->j_max_commit_age
= commit_max_age
;
2808 journal
->j_max_trans_age
= commit_max_age
;
2811 reiserfs_info(p_s_sb
, "journal params: device %s, size %u, "
2812 "journal first block %u, max trans len %u, max batch %u, "
2813 "max commit age %u, max trans age %u\n",
2814 bdevname(journal
->j_dev_bd
, b
),
2815 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2816 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2817 journal
->j_trans_max
,
2818 journal
->j_max_batch
,
2819 journal
->j_max_commit_age
, journal
->j_max_trans_age
);
2823 journal
->j_list_bitmap_index
= 0;
2824 journal_list_init(p_s_sb
);
2826 memset(journal
->j_list_hash_table
, 0,
2827 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
2829 INIT_LIST_HEAD(&journal
->j_dirty_buffers
);
2830 spin_lock_init(&journal
->j_dirty_buffers_lock
);
2832 journal
->j_start
= 0;
2834 journal
->j_len_alloc
= 0;
2835 atomic_set(&(journal
->j_wcount
), 0);
2836 atomic_set(&(journal
->j_async_throttle
), 0);
2837 journal
->j_bcount
= 0;
2838 journal
->j_trans_start_time
= 0;
2839 journal
->j_last
= NULL
;
2840 journal
->j_first
= NULL
;
2841 init_waitqueue_head(&(journal
->j_join_wait
));
2842 sema_init(&journal
->j_lock
, 1);
2843 sema_init(&journal
->j_flush_sem
, 1);
2845 journal
->j_trans_id
= 10;
2846 journal
->j_mount_id
= 10;
2847 journal
->j_state
= 0;
2848 atomic_set(&(journal
->j_jlock
), 0);
2849 journal
->j_cnode_free_list
= allocate_cnodes(num_cnodes
);
2850 journal
->j_cnode_free_orig
= journal
->j_cnode_free_list
;
2851 journal
->j_cnode_free
= journal
->j_cnode_free_list
? num_cnodes
: 0;
2852 journal
->j_cnode_used
= 0;
2853 journal
->j_must_wait
= 0;
2855 if (journal
->j_cnode_free
== 0) {
2856 reiserfs_warning(p_s_sb
, "journal-2004: Journal cnode memory "
2857 "allocation failed (%ld bytes). Journal is "
2858 "too large for available memory. Usually "
2859 "this is due to a journal that is too large.",
2860 sizeof (struct reiserfs_journal_cnode
) * num_cnodes
);
2861 goto free_and_return
;
2864 init_journal_hash(p_s_sb
);
2865 jl
= journal
->j_current_jl
;
2866 jl
->j_list_bitmap
= get_list_bitmap(p_s_sb
, jl
);
2867 if (!jl
->j_list_bitmap
) {
2868 reiserfs_warning(p_s_sb
,
2869 "journal-2005, get_list_bitmap failed for journal list 0");
2870 goto free_and_return
;
2872 if (journal_read(p_s_sb
) < 0) {
2873 reiserfs_warning(p_s_sb
, "Replay Failure, unable to mount");
2874 goto free_and_return
;
2877 reiserfs_mounted_fs_count
++;
2878 if (reiserfs_mounted_fs_count
<= 1)
2879 commit_wq
= create_workqueue("reiserfs");
2881 INIT_DELAYED_WORK(&journal
->j_work
, flush_async_commits
);
2882 journal
->j_work_sb
= p_s_sb
;
2885 free_journal_ram(p_s_sb
);
2890 ** test for a polite end of the current transaction. Used by file_write, and should
2891 ** be used by delete to make sure they don't write more than can fit inside a single
2894 int journal_transaction_should_end(struct reiserfs_transaction_handle
*th
,
2897 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2898 time_t now
= get_seconds();
2899 /* cannot restart while nested */
2900 BUG_ON(!th
->t_trans_id
);
2901 if (th
->t_refcount
> 1)
2903 if (journal
->j_must_wait
> 0 ||
2904 (journal
->j_len_alloc
+ new_alloc
) >= journal
->j_max_batch
||
2905 atomic_read(&(journal
->j_jlock
)) ||
2906 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
||
2907 journal
->j_cnode_free
< (journal
->j_trans_max
* 3)) {
2910 /* protected by the BKL here */
2911 journal
->j_len_alloc
+= new_alloc
;
2912 th
->t_blocks_allocated
+= new_alloc
;
2916 /* this must be called inside a transaction, and requires the
2917 ** kernel_lock to be held
2919 void reiserfs_block_writes(struct reiserfs_transaction_handle
*th
)
2921 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2922 BUG_ON(!th
->t_trans_id
);
2923 journal
->j_must_wait
= 1;
2924 set_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2928 /* this must be called without a transaction started, and does not
2931 void reiserfs_allow_writes(struct super_block
*s
)
2933 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2934 clear_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2935 wake_up(&journal
->j_join_wait
);
2938 /* this must be called without a transaction started, and does not
2941 void reiserfs_wait_on_write_block(struct super_block
*s
)
2943 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2944 wait_event(journal
->j_join_wait
,
2945 !test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
));
2948 static void queue_log_writer(struct super_block
*s
)
2951 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2952 set_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
2955 * we don't want to use wait_event here because
2956 * we only want to wait once.
2958 init_waitqueue_entry(&wait
, current
);
2959 add_wait_queue(&journal
->j_join_wait
, &wait
);
2960 set_current_state(TASK_UNINTERRUPTIBLE
);
2961 if (test_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2963 __set_current_state(TASK_RUNNING
);
2964 remove_wait_queue(&journal
->j_join_wait
, &wait
);
2967 static void wake_queued_writers(struct super_block
*s
)
2969 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2970 if (test_and_clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2971 wake_up(&journal
->j_join_wait
);
2974 static void let_transaction_grow(struct super_block
*sb
, unsigned long trans_id
)
2976 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2977 unsigned long bcount
= journal
->j_bcount
;
2979 schedule_timeout_uninterruptible(1);
2980 journal
->j_current_jl
->j_state
|= LIST_COMMIT_PENDING
;
2981 while ((atomic_read(&journal
->j_wcount
) > 0 ||
2982 atomic_read(&journal
->j_jlock
)) &&
2983 journal
->j_trans_id
== trans_id
) {
2984 queue_log_writer(sb
);
2986 if (journal
->j_trans_id
!= trans_id
)
2988 if (bcount
== journal
->j_bcount
)
2990 bcount
= journal
->j_bcount
;
2994 /* join == true if you must join an existing transaction.
2995 ** join == false if you can deal with waiting for others to finish
2997 ** this will block until the transaction is joinable. send the number of blocks you
2998 ** expect to use in nblocks.
3000 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
3001 struct super_block
*p_s_sb
, unsigned long nblocks
,
3004 time_t now
= get_seconds();
3006 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3007 struct reiserfs_transaction_handle myth
;
3008 int sched_count
= 0;
3011 reiserfs_check_lock_depth(p_s_sb
, "journal_begin");
3012 BUG_ON(nblocks
> journal
->j_trans_max
);
3014 PROC_INFO_INC(p_s_sb
, journal
.journal_being
);
3015 /* set here for journal_join */
3017 th
->t_super
= p_s_sb
;
3020 lock_journal(p_s_sb
);
3021 if (join
!= JBEGIN_ABORT
&& reiserfs_is_journal_aborted(journal
)) {
3022 unlock_journal(p_s_sb
);
3023 retval
= journal
->j_errno
;
3026 journal
->j_bcount
++;
3028 if (test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) {
3029 unlock_journal(p_s_sb
);
3030 reiserfs_wait_on_write_block(p_s_sb
);
3031 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_writers
);
3034 now
= get_seconds();
3036 /* if there is no room in the journal OR
3037 ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning
3038 ** we don't sleep if there aren't other writers
3041 if ((!join
&& journal
->j_must_wait
> 0) ||
3043 && (journal
->j_len_alloc
+ nblocks
+ 2) >= journal
->j_max_batch
)
3044 || (!join
&& atomic_read(&journal
->j_wcount
) > 0
3045 && journal
->j_trans_start_time
> 0
3046 && (now
- journal
->j_trans_start_time
) >
3047 journal
->j_max_trans_age
) || (!join
3048 && atomic_read(&journal
->j_jlock
))
3049 || (!join
&& journal
->j_cnode_free
< (journal
->j_trans_max
* 3))) {
3051 old_trans_id
= journal
->j_trans_id
;
3052 unlock_journal(p_s_sb
); /* allow others to finish this transaction */
3054 if (!join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >=
3055 journal
->j_max_batch
&&
3056 ((journal
->j_len
+ nblocks
+ 2) * 100) <
3057 (journal
->j_len_alloc
* 75)) {
3058 if (atomic_read(&journal
->j_wcount
) > 10) {
3060 queue_log_writer(p_s_sb
);
3064 /* don't mess with joining the transaction if all we have to do is
3065 * wait for someone else to do a commit
3067 if (atomic_read(&journal
->j_jlock
)) {
3068 while (journal
->j_trans_id
== old_trans_id
&&
3069 atomic_read(&journal
->j_jlock
)) {
3070 queue_log_writer(p_s_sb
);
3074 retval
= journal_join(&myth
, p_s_sb
, 1);
3078 /* someone might have ended the transaction while we joined */
3079 if (old_trans_id
!= journal
->j_trans_id
) {
3080 retval
= do_journal_end(&myth
, p_s_sb
, 1, 0);
3082 retval
= do_journal_end(&myth
, p_s_sb
, 1, COMMIT_NOW
);
3088 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_wcount
);
3091 /* we are the first writer, set trans_id */
3092 if (journal
->j_trans_start_time
== 0) {
3093 journal
->j_trans_start_time
= get_seconds();
3095 atomic_inc(&(journal
->j_wcount
));
3096 journal
->j_len_alloc
+= nblocks
;
3097 th
->t_blocks_logged
= 0;
3098 th
->t_blocks_allocated
= nblocks
;
3099 th
->t_trans_id
= journal
->j_trans_id
;
3100 unlock_journal(p_s_sb
);
3101 INIT_LIST_HEAD(&th
->t_list
);
3106 memset(th
, 0, sizeof(*th
));
3107 /* Re-set th->t_super, so we can properly keep track of how many
3108 * persistent transactions there are. We need to do this so if this
3109 * call is part of a failed restart_transaction, we can free it later */
3110 th
->t_super
= p_s_sb
;
3114 struct reiserfs_transaction_handle
*reiserfs_persistent_transaction(struct
3120 struct reiserfs_transaction_handle
*th
;
3122 /* if we're nesting into an existing transaction. It will be
3123 ** persistent on its own
3125 if (reiserfs_transaction_running(s
)) {
3126 th
= current
->journal_info
;
3128 BUG_ON(th
->t_refcount
< 2);
3132 th
= kmalloc(sizeof(struct reiserfs_transaction_handle
), GFP_NOFS
);
3135 ret
= journal_begin(th
, s
, nblocks
);
3141 SB_JOURNAL(s
)->j_persistent_trans
++;
3145 int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle
*th
)
3147 struct super_block
*s
= th
->t_super
;
3150 ret
= journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
3153 if (th
->t_refcount
== 0) {
3154 SB_JOURNAL(s
)->j_persistent_trans
--;
3160 static int journal_join(struct reiserfs_transaction_handle
*th
,
3161 struct super_block
*p_s_sb
, unsigned long nblocks
)
3163 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3165 /* this keeps do_journal_end from NULLing out the current->journal_info
3168 th
->t_handle_save
= cur_th
;
3169 BUG_ON(cur_th
&& cur_th
->t_refcount
> 1);
3170 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_JOIN
);
3173 int journal_join_abort(struct reiserfs_transaction_handle
*th
,
3174 struct super_block
*p_s_sb
, unsigned long nblocks
)
3176 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3178 /* this keeps do_journal_end from NULLing out the current->journal_info
3181 th
->t_handle_save
= cur_th
;
3182 BUG_ON(cur_th
&& cur_th
->t_refcount
> 1);
3183 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_ABORT
);
3186 int journal_begin(struct reiserfs_transaction_handle
*th
,
3187 struct super_block
*p_s_sb
, unsigned long nblocks
)
3189 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3192 th
->t_handle_save
= NULL
;
3194 /* we are nesting into the current transaction */
3195 if (cur_th
->t_super
== p_s_sb
) {
3196 BUG_ON(!cur_th
->t_refcount
);
3197 cur_th
->t_refcount
++;
3198 memcpy(th
, cur_th
, sizeof(*th
));
3199 if (th
->t_refcount
<= 1)
3200 reiserfs_warning(p_s_sb
,
3201 "BAD: refcount <= 1, but journal_info != 0");
3204 /* we've ended up with a handle from a different filesystem.
3205 ** save it and restore on journal_end. This should never
3208 reiserfs_warning(p_s_sb
,
3209 "clm-2100: nesting info a different FS");
3210 th
->t_handle_save
= current
->journal_info
;
3211 current
->journal_info
= th
;
3214 current
->journal_info
= th
;
3216 ret
= do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_REG
);
3217 BUG_ON(current
->journal_info
!= th
);
3219 /* I guess this boils down to being the reciprocal of clm-2100 above.
3220 * If do_journal_begin_r fails, we need to put it back, since journal_end
3221 * won't be called to do it. */
3223 current
->journal_info
= th
->t_handle_save
;
3225 BUG_ON(!th
->t_refcount
);
3231 ** puts bh into the current transaction. If it was already there, reorders removes the
3232 ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
3234 ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the
3235 ** transaction is committed.
3237 ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
3239 int journal_mark_dirty(struct reiserfs_transaction_handle
*th
,
3240 struct super_block
*p_s_sb
, struct buffer_head
*bh
)
3242 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3243 struct reiserfs_journal_cnode
*cn
= NULL
;
3244 int count_already_incd
= 0;
3246 BUG_ON(!th
->t_trans_id
);
3248 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty
);
3249 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3250 reiserfs_panic(th
->t_super
,
3251 "journal-1577: handle trans id %ld != current trans id %ld\n",
3252 th
->t_trans_id
, journal
->j_trans_id
);
3257 prepared
= test_clear_buffer_journal_prepared(bh
);
3258 clear_buffer_journal_restore_dirty(bh
);
3259 /* already in this transaction, we are done */
3260 if (buffer_journaled(bh
)) {
3261 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_already
);
3265 /* this must be turned into a panic instead of a warning. We can't allow
3266 ** a dirty or journal_dirty or locked buffer to be logged, as some changes
3267 ** could get to disk too early. NOT GOOD.
3269 if (!prepared
|| buffer_dirty(bh
)) {
3270 reiserfs_warning(p_s_sb
, "journal-1777: buffer %llu bad state "
3271 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3272 (unsigned long long)bh
->b_blocknr
,
3273 prepared
? ' ' : '!',
3274 buffer_locked(bh
) ? ' ' : '!',
3275 buffer_dirty(bh
) ? ' ' : '!',
3276 buffer_journal_dirty(bh
) ? ' ' : '!');
3279 if (atomic_read(&(journal
->j_wcount
)) <= 0) {
3280 reiserfs_warning(p_s_sb
,
3281 "journal-1409: journal_mark_dirty returning because j_wcount was %d",
3282 atomic_read(&(journal
->j_wcount
)));
3285 /* this error means I've screwed up, and we've overflowed the transaction.
3286 ** Nothing can be done here, except make the FS readonly or panic.
3288 if (journal
->j_len
>= journal
->j_trans_max
) {
3289 reiserfs_panic(th
->t_super
,
3290 "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n",
3294 if (buffer_journal_dirty(bh
)) {
3295 count_already_incd
= 1;
3296 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_notjournal
);
3297 clear_buffer_journal_dirty(bh
);
3300 if (journal
->j_len
> journal
->j_len_alloc
) {
3301 journal
->j_len_alloc
= journal
->j_len
+ JOURNAL_PER_BALANCE_CNT
;
3304 set_buffer_journaled(bh
);
3306 /* now put this guy on the end */
3308 cn
= get_cnode(p_s_sb
);
3310 reiserfs_panic(p_s_sb
, "get_cnode failed!\n");
3313 if (th
->t_blocks_logged
== th
->t_blocks_allocated
) {
3314 th
->t_blocks_allocated
+= JOURNAL_PER_BALANCE_CNT
;
3315 journal
->j_len_alloc
+= JOURNAL_PER_BALANCE_CNT
;
3317 th
->t_blocks_logged
++;
3321 cn
->blocknr
= bh
->b_blocknr
;
3324 insert_journal_hash(journal
->j_hash_table
, cn
);
3325 if (!count_already_incd
) {
3330 cn
->prev
= journal
->j_last
;
3332 if (journal
->j_last
) {
3333 journal
->j_last
->next
= cn
;
3334 journal
->j_last
= cn
;
3336 journal
->j_first
= cn
;
3337 journal
->j_last
= cn
;
3342 int journal_end(struct reiserfs_transaction_handle
*th
,
3343 struct super_block
*p_s_sb
, unsigned long nblocks
)
3345 if (!current
->journal_info
&& th
->t_refcount
> 1)
3346 reiserfs_warning(p_s_sb
, "REISER-NESTING: th NULL, refcount %d",
3349 if (!th
->t_trans_id
) {
3355 if (th
->t_refcount
> 0) {
3356 struct reiserfs_transaction_handle
*cur_th
=
3357 current
->journal_info
;
3359 /* we aren't allowed to close a nested transaction on a different
3360 ** filesystem from the one in the task struct
3362 BUG_ON(cur_th
->t_super
!= th
->t_super
);
3365 memcpy(current
->journal_info
, th
, sizeof(*th
));
3370 return do_journal_end(th
, p_s_sb
, nblocks
, 0);
3374 /* removes from the current transaction, relsing and descrementing any counters.
3375 ** also files the removed buffer directly onto the clean list
3377 ** called by journal_mark_freed when a block has been deleted
3379 ** returns 1 if it cleaned and relsed the buffer. 0 otherwise
3381 static int remove_from_transaction(struct super_block
*p_s_sb
,
3382 b_blocknr_t blocknr
, int already_cleaned
)
3384 struct buffer_head
*bh
;
3385 struct reiserfs_journal_cnode
*cn
;
3386 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3389 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3390 if (!cn
|| !cn
->bh
) {
3395 cn
->prev
->next
= cn
->next
;
3398 cn
->next
->prev
= cn
->prev
;
3400 if (cn
== journal
->j_first
) {
3401 journal
->j_first
= cn
->next
;
3403 if (cn
== journal
->j_last
) {
3404 journal
->j_last
= cn
->prev
;
3407 remove_journal_hash(p_s_sb
, journal
->j_hash_table
, NULL
,
3409 clear_buffer_journaled(bh
); /* don't log this one */
3411 if (!already_cleaned
) {
3412 clear_buffer_journal_dirty(bh
);
3413 clear_buffer_dirty(bh
);
3414 clear_buffer_journal_test(bh
);
3416 if (atomic_read(&(bh
->b_count
)) < 0) {
3417 reiserfs_warning(p_s_sb
,
3418 "journal-1752: remove from trans, b_count < 0");
3423 journal
->j_len_alloc
--;
3424 free_cnode(p_s_sb
, cn
);
3429 ** for any cnode in a journal list, it can only be dirtied of all the
3430 ** transactions that include it are committed to disk.
3431 ** this checks through each transaction, and returns 1 if you are allowed to dirty,
3432 ** and 0 if you aren't
3434 ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
3435 ** blocks for a given transaction on disk
3438 static int can_dirty(struct reiserfs_journal_cnode
*cn
)
3440 struct super_block
*sb
= cn
->sb
;
3441 b_blocknr_t blocknr
= cn
->blocknr
;
3442 struct reiserfs_journal_cnode
*cur
= cn
->hprev
;
3445 /* first test hprev. These are all newer than cn, so any node here
3446 ** with the same block number and dev means this node can't be sent
3447 ** to disk right now.
3449 while (cur
&& can_dirty
) {
3450 if (cur
->jlist
&& cur
->bh
&& cur
->blocknr
&& cur
->sb
== sb
&&
3451 cur
->blocknr
== blocknr
) {
3456 /* then test hnext. These are all older than cn. As long as they
3457 ** are committed to the log, it is safe to write cn to disk
3460 while (cur
&& can_dirty
) {
3461 if (cur
->jlist
&& cur
->jlist
->j_len
> 0 &&
3462 atomic_read(&(cur
->jlist
->j_commit_left
)) > 0 && cur
->bh
&&
3463 cur
->blocknr
&& cur
->sb
== sb
&& cur
->blocknr
== blocknr
) {
3471 /* syncs the commit blocks, but does not force the real buffers to disk
3472 ** will wait until the current transaction is done/committed before returning
3474 int journal_end_sync(struct reiserfs_transaction_handle
*th
,
3475 struct super_block
*p_s_sb
, unsigned long nblocks
)
3477 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3479 BUG_ON(!th
->t_trans_id
);
3480 /* you can sync while nested, very, very bad */
3481 BUG_ON(th
->t_refcount
> 1);
3482 if (journal
->j_len
== 0) {
3483 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3485 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3487 return do_journal_end(th
, p_s_sb
, nblocks
, COMMIT_NOW
| WAIT
);
3491 ** writeback the pending async commits to disk
3493 static void flush_async_commits(struct work_struct
*work
)
3495 struct reiserfs_journal
*journal
=
3496 container_of(work
, struct reiserfs_journal
, j_work
.work
);
3497 struct super_block
*p_s_sb
= journal
->j_work_sb
;
3498 struct reiserfs_journal_list
*jl
;
3499 struct list_head
*entry
;
3502 if (!list_empty(&journal
->j_journal_list
)) {
3503 /* last entry is the youngest, commit it and you get everything */
3504 entry
= journal
->j_journal_list
.prev
;
3505 jl
= JOURNAL_LIST_ENTRY(entry
);
3506 flush_commit_list(p_s_sb
, jl
, 1);
3512 ** flushes any old transactions to disk
3513 ** ends the current transaction if it is too old
3515 int reiserfs_flush_old_commits(struct super_block
*p_s_sb
)
3518 struct reiserfs_transaction_handle th
;
3519 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3521 now
= get_seconds();
3522 /* safety check so we don't flush while we are replaying the log during
3525 if (list_empty(&journal
->j_journal_list
)) {
3529 /* check the current transaction. If there are no writers, and it is
3530 * too old, finish it, and force the commit blocks to disk
3532 if (atomic_read(&journal
->j_wcount
) <= 0 &&
3533 journal
->j_trans_start_time
> 0 &&
3534 journal
->j_len
> 0 &&
3535 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3536 if (!journal_join(&th
, p_s_sb
, 1)) {
3537 reiserfs_prepare_for_journal(p_s_sb
,
3538 SB_BUFFER_WITH_SB(p_s_sb
),
3540 journal_mark_dirty(&th
, p_s_sb
,
3541 SB_BUFFER_WITH_SB(p_s_sb
));
3543 /* we're only being called from kreiserfsd, it makes no sense to do
3544 ** an async commit so that kreiserfsd can do it later
3546 do_journal_end(&th
, p_s_sb
, 1, COMMIT_NOW
| WAIT
);
3549 return p_s_sb
->s_dirt
;
3553 ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
3555 ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all
3556 ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just
3557 ** flushes the commit list and returns 0.
3559 ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait.
3561 ** Note, we can't allow the journal_end to proceed while there are still writers in the log.
3563 static int check_journal_end(struct reiserfs_transaction_handle
*th
,
3564 struct super_block
*p_s_sb
, unsigned long nblocks
,
3569 int flush
= flags
& FLUSH_ALL
;
3570 int commit_now
= flags
& COMMIT_NOW
;
3571 int wait_on_commit
= flags
& WAIT
;
3572 struct reiserfs_journal_list
*jl
;
3573 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3575 BUG_ON(!th
->t_trans_id
);
3577 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3578 reiserfs_panic(th
->t_super
,
3579 "journal-1577: handle trans id %ld != current trans id %ld\n",
3580 th
->t_trans_id
, journal
->j_trans_id
);
3583 journal
->j_len_alloc
-= (th
->t_blocks_allocated
- th
->t_blocks_logged
);
3584 if (atomic_read(&(journal
->j_wcount
)) > 0) { /* <= 0 is allowed. unmounting might not call begin */
3585 atomic_dec(&(journal
->j_wcount
));
3588 /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released
3589 ** will be dealt with by next transaction that actually writes something, but should be taken
3590 ** care of in this trans
3592 BUG_ON(journal
->j_len
== 0);
3594 /* if wcount > 0, and we are called to with flush or commit_now,
3595 ** we wait on j_join_wait. We will wake up when the last writer has
3596 ** finished the transaction, and started it on its way to the disk.
3597 ** Then, we flush the commit or journal list, and just return 0
3598 ** because the rest of journal end was already done for this transaction.
3600 if (atomic_read(&(journal
->j_wcount
)) > 0) {
3601 if (flush
|| commit_now
) {
3604 jl
= journal
->j_current_jl
;
3605 trans_id
= jl
->j_trans_id
;
3607 jl
->j_state
|= LIST_COMMIT_PENDING
;
3608 atomic_set(&(journal
->j_jlock
), 1);
3610 journal
->j_next_full_flush
= 1;
3612 unlock_journal(p_s_sb
);
3614 /* sleep while the current transaction is still j_jlocked */
3615 while (journal
->j_trans_id
== trans_id
) {
3616 if (atomic_read(&journal
->j_jlock
)) {
3617 queue_log_writer(p_s_sb
);
3619 lock_journal(p_s_sb
);
3620 if (journal
->j_trans_id
== trans_id
) {
3621 atomic_set(&(journal
->j_jlock
),
3624 unlock_journal(p_s_sb
);
3627 BUG_ON(journal
->j_trans_id
== trans_id
);
3630 && journal_list_still_alive(p_s_sb
, trans_id
)
3631 && wait_on_commit
) {
3632 flush_commit_list(p_s_sb
, jl
, 1);
3636 unlock_journal(p_s_sb
);
3640 /* deal with old transactions where we are the last writers */
3641 now
= get_seconds();
3642 if ((now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3644 journal
->j_next_async_flush
= 1;
3646 /* don't batch when someone is waiting on j_join_wait */
3647 /* don't batch when syncing the commit or flushing the whole trans */
3648 if (!(journal
->j_must_wait
> 0) && !(atomic_read(&(journal
->j_jlock
)))
3649 && !flush
&& !commit_now
&& (journal
->j_len
< journal
->j_max_batch
)
3650 && journal
->j_len_alloc
< journal
->j_max_batch
3651 && journal
->j_cnode_free
> (journal
->j_trans_max
* 3)) {
3652 journal
->j_bcount
++;
3653 unlock_journal(p_s_sb
);
3657 if (journal
->j_start
> SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
3658 reiserfs_panic(p_s_sb
,
3659 "journal-003: journal_end: j_start (%ld) is too high\n",
3666 ** Does all the work that makes deleting blocks safe.
3667 ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
3670 ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes
3671 ** before this transaction has finished.
3673 ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with
3674 ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash,
3675 ** the block can't be reallocated yet.
3677 ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
3679 int journal_mark_freed(struct reiserfs_transaction_handle
*th
,
3680 struct super_block
*p_s_sb
, b_blocknr_t blocknr
)
3682 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3683 struct reiserfs_journal_cnode
*cn
= NULL
;
3684 struct buffer_head
*bh
= NULL
;
3685 struct reiserfs_list_bitmap
*jb
= NULL
;
3687 BUG_ON(!th
->t_trans_id
);
3689 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3694 /* if it is journal new, we just remove it from this transaction */
3695 if (bh
&& buffer_journal_new(bh
)) {
3696 clear_buffer_journal_new(bh
);
3697 clear_prepared_bits(bh
);
3698 reiserfs_clean_and_file_buffer(bh
);
3699 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3701 /* set the bit for this block in the journal bitmap for this transaction */
3702 jb
= journal
->j_current_jl
->j_list_bitmap
;
3704 reiserfs_panic(p_s_sb
,
3705 "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n");
3707 set_bit_in_list_bitmap(p_s_sb
, blocknr
, jb
);
3709 /* Note, the entire while loop is not allowed to schedule. */
3712 clear_prepared_bits(bh
);
3713 reiserfs_clean_and_file_buffer(bh
);
3715 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3717 /* find all older transactions with this block, make sure they don't try to write it out */
3718 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
,
3721 if (p_s_sb
== cn
->sb
&& blocknr
== cn
->blocknr
) {
3722 set_bit(BLOCK_FREED
, &cn
->state
);
3725 /* remove_from_transaction will brelse the buffer if it was
3726 ** in the current trans
3728 clear_buffer_journal_dirty(cn
->
3730 clear_buffer_dirty(cn
->bh
);
3731 clear_buffer_journal_test(cn
->
3736 (&(cn
->bh
->b_count
)) < 0) {
3737 reiserfs_warning(p_s_sb
,
3738 "journal-2138: cn->bh->b_count < 0");
3741 if (cn
->jlist
) { /* since we are clearing the bh, we MUST dec nonzerolen */
3754 release_buffer_page(bh
); /* get_hash grabs the buffer */
3758 void reiserfs_update_inode_transaction(struct inode
*inode
)
3760 struct reiserfs_journal
*journal
= SB_JOURNAL(inode
->i_sb
);
3761 REISERFS_I(inode
)->i_jl
= journal
->j_current_jl
;
3762 REISERFS_I(inode
)->i_trans_id
= journal
->j_trans_id
;
3766 * returns -1 on error, 0 if no commits/barriers were done and 1
3767 * if a transaction was actually committed and the barrier was done
3769 static int __commit_trans_jl(struct inode
*inode
, unsigned long id
,
3770 struct reiserfs_journal_list
*jl
)
3772 struct reiserfs_transaction_handle th
;
3773 struct super_block
*sb
= inode
->i_sb
;
3774 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3777 /* is it from the current transaction, or from an unknown transaction? */
3778 if (id
== journal
->j_trans_id
) {
3779 jl
= journal
->j_current_jl
;
3780 /* try to let other writers come in and grow this transaction */
3781 let_transaction_grow(sb
, id
);
3782 if (journal
->j_trans_id
!= id
) {
3783 goto flush_commit_only
;
3786 ret
= journal_begin(&th
, sb
, 1);
3790 /* someone might have ended this transaction while we joined */
3791 if (journal
->j_trans_id
!= id
) {
3792 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
3794 journal_mark_dirty(&th
, sb
, SB_BUFFER_WITH_SB(sb
));
3795 ret
= journal_end(&th
, sb
, 1);
3796 goto flush_commit_only
;
3799 ret
= journal_end_sync(&th
, sb
, 1);
3804 /* this gets tricky, we have to make sure the journal list in
3805 * the inode still exists. We know the list is still around
3806 * if we've got a larger transaction id than the oldest list
3809 if (journal_list_still_alive(inode
->i_sb
, id
)) {
3811 * we only set ret to 1 when we know for sure
3812 * the barrier hasn't been started yet on the commit
3815 if (atomic_read(&jl
->j_commit_left
) > 1)
3817 flush_commit_list(sb
, jl
, 1);
3818 if (journal
->j_errno
)
3819 ret
= journal
->j_errno
;
3822 /* otherwise the list is gone, and long since committed */
3826 int reiserfs_commit_for_inode(struct inode
*inode
)
3828 unsigned long id
= REISERFS_I(inode
)->i_trans_id
;
3829 struct reiserfs_journal_list
*jl
= REISERFS_I(inode
)->i_jl
;
3831 /* for the whole inode, assume unset id means it was
3832 * changed in the current transaction. More conservative
3835 reiserfs_update_inode_transaction(inode
);
3836 id
= REISERFS_I(inode
)->i_trans_id
;
3837 /* jl will be updated in __commit_trans_jl */
3840 return __commit_trans_jl(inode
, id
, jl
);
3843 void reiserfs_restore_prepared_buffer(struct super_block
*p_s_sb
,
3844 struct buffer_head
*bh
)
3846 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3847 PROC_INFO_INC(p_s_sb
, journal
.restore_prepared
);
3851 if (test_clear_buffer_journal_restore_dirty(bh
) &&
3852 buffer_journal_dirty(bh
)) {
3853 struct reiserfs_journal_cnode
*cn
;
3854 cn
= get_journal_hash_dev(p_s_sb
,
3855 journal
->j_list_hash_table
,
3857 if (cn
&& can_dirty(cn
)) {
3858 set_buffer_journal_test(bh
);
3859 mark_buffer_dirty(bh
);
3862 clear_buffer_journal_prepared(bh
);
3865 extern struct tree_balance
*cur_tb
;
3867 ** before we can change a metadata block, we have to make sure it won't
3868 ** be written to disk while we are altering it. So, we must:
3873 int reiserfs_prepare_for_journal(struct super_block
*p_s_sb
,
3874 struct buffer_head
*bh
, int wait
)
3876 PROC_INFO_INC(p_s_sb
, journal
.prepare
);
3878 if (test_set_buffer_locked(bh
)) {
3883 set_buffer_journal_prepared(bh
);
3884 if (test_clear_buffer_dirty(bh
) && buffer_journal_dirty(bh
)) {
3885 clear_buffer_journal_test(bh
);
3886 set_buffer_journal_restore_dirty(bh
);
3892 static void flush_old_journal_lists(struct super_block
*s
)
3894 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
3895 struct reiserfs_journal_list
*jl
;
3896 struct list_head
*entry
;
3897 time_t now
= get_seconds();
3899 while (!list_empty(&journal
->j_journal_list
)) {
3900 entry
= journal
->j_journal_list
.next
;
3901 jl
= JOURNAL_LIST_ENTRY(entry
);
3902 /* this check should always be run, to send old lists to disk */
3903 if (jl
->j_timestamp
< (now
- (JOURNAL_MAX_TRANS_AGE
* 4)) &&
3904 atomic_read(&jl
->j_commit_left
) == 0 &&
3905 test_transaction(s
, jl
)) {
3906 flush_used_journal_lists(s
, jl
);
3914 ** long and ugly. If flush, will not return until all commit
3915 ** blocks and all real buffers in the trans are on disk.
3916 ** If no_async, won't return until all commit blocks are on disk.
3918 ** keep reading, there are comments as you go along
3920 ** If the journal is aborted, we just clean up. Things like flushing
3921 ** journal lists, etc just won't happen.
3923 static int do_journal_end(struct reiserfs_transaction_handle
*th
,
3924 struct super_block
*p_s_sb
, unsigned long nblocks
,
3927 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3928 struct reiserfs_journal_cnode
*cn
, *next
, *jl_cn
;
3929 struct reiserfs_journal_cnode
*last_cn
= NULL
;
3930 struct reiserfs_journal_desc
*desc
;
3931 struct reiserfs_journal_commit
*commit
;
3932 struct buffer_head
*c_bh
; /* commit bh */
3933 struct buffer_head
*d_bh
; /* desc bh */
3934 int cur_write_start
= 0; /* start index of current log write */
3939 struct reiserfs_journal_list
*jl
, *temp_jl
;
3940 struct list_head
*entry
, *safe
;
3941 unsigned long jindex
;
3942 unsigned long commit_trans_id
;
3945 BUG_ON(th
->t_refcount
> 1);
3946 BUG_ON(!th
->t_trans_id
);
3948 /* protect flush_older_commits from doing mistakes if the
3949 transaction ID counter gets overflowed. */
3950 if (th
->t_trans_id
== ~0UL)
3951 flags
|= FLUSH_ALL
| COMMIT_NOW
| WAIT
;
3952 flush
= flags
& FLUSH_ALL
;
3953 wait_on_commit
= flags
& WAIT
;
3956 current
->journal_info
= th
->t_handle_save
;
3957 reiserfs_check_lock_depth(p_s_sb
, "journal end");
3958 if (journal
->j_len
== 0) {
3959 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3961 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3964 lock_journal(p_s_sb
);
3965 if (journal
->j_next_full_flush
) {
3969 if (journal
->j_next_async_flush
) {
3970 flags
|= COMMIT_NOW
| WAIT
;
3974 /* check_journal_end locks the journal, and unlocks if it does not return 1
3975 ** it tells us if we should continue with the journal_end, or just return
3977 if (!check_journal_end(th
, p_s_sb
, nblocks
, flags
)) {
3979 wake_queued_writers(p_s_sb
);
3980 reiserfs_async_progress_wait(p_s_sb
);
3984 /* check_journal_end might set these, check again */
3985 if (journal
->j_next_full_flush
) {
3990 ** j must wait means we have to flush the log blocks, and the real blocks for
3993 if (journal
->j_must_wait
> 0) {
3996 #ifdef REISERFS_PREALLOCATE
3997 /* quota ops might need to nest, setup the journal_info pointer for them
3998 * and raise the refcount so that it is > 0. */
3999 current
->journal_info
= th
;
4001 reiserfs_discard_all_prealloc(th
); /* it should not involve new blocks into
4002 * the transaction */
4004 current
->journal_info
= th
->t_handle_save
;
4007 /* setup description block */
4009 journal_getblk(p_s_sb
,
4010 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
4012 set_buffer_uptodate(d_bh
);
4013 desc
= (struct reiserfs_journal_desc
*)(d_bh
)->b_data
;
4014 memset(d_bh
->b_data
, 0, d_bh
->b_size
);
4015 memcpy(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8);
4016 set_desc_trans_id(desc
, journal
->j_trans_id
);
4018 /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */
4019 c_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
4020 ((journal
->j_start
+ journal
->j_len
+
4021 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
4022 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
4023 memset(c_bh
->b_data
, 0, c_bh
->b_size
);
4024 set_commit_trans_id(commit
, journal
->j_trans_id
);
4025 set_buffer_uptodate(c_bh
);
4027 /* init this journal list */
4028 jl
= journal
->j_current_jl
;
4030 /* we lock the commit before doing anything because
4031 * we want to make sure nobody tries to run flush_commit_list until
4032 * the new transaction is fully setup, and we've already flushed the
4035 down(&jl
->j_commit_lock
);
4037 /* save the transaction id in case we need to commit it later */
4038 commit_trans_id
= jl
->j_trans_id
;
4040 atomic_set(&jl
->j_older_commits_done
, 0);
4041 jl
->j_trans_id
= journal
->j_trans_id
;
4042 jl
->j_timestamp
= journal
->j_trans_start_time
;
4043 jl
->j_commit_bh
= c_bh
;
4044 jl
->j_start
= journal
->j_start
;
4045 jl
->j_len
= journal
->j_len
;
4046 atomic_set(&jl
->j_nonzerolen
, journal
->j_len
);
4047 atomic_set(&jl
->j_commit_left
, journal
->j_len
+ 2);
4048 jl
->j_realblock
= NULL
;
4050 /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
4051 ** for each real block, add it to the journal list hash,
4052 ** copy into real block index array in the commit or desc block
4054 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
4055 for (i
= 0, cn
= journal
->j_first
; cn
; cn
= cn
->next
, i
++) {
4056 if (buffer_journaled(cn
->bh
)) {
4057 jl_cn
= get_cnode(p_s_sb
);
4059 reiserfs_panic(p_s_sb
,
4060 "journal-1676, get_cnode returned NULL\n");
4063 jl
->j_realblock
= jl_cn
;
4065 jl_cn
->prev
= last_cn
;
4068 last_cn
->next
= jl_cn
;
4071 /* make sure the block we are trying to log is not a block
4072 of journal or reserved area */
4074 if (is_block_in_log_or_reserved_area
4075 (p_s_sb
, cn
->bh
->b_blocknr
)) {
4076 reiserfs_panic(p_s_sb
,
4077 "journal-2332: Trying to log block %lu, which is a log block\n",
4080 jl_cn
->blocknr
= cn
->bh
->b_blocknr
;
4085 insert_journal_hash(journal
->j_list_hash_table
, jl_cn
);
4086 if (i
< trans_half
) {
4087 desc
->j_realblock
[i
] =
4088 cpu_to_le32(cn
->bh
->b_blocknr
);
4090 commit
->j_realblock
[i
- trans_half
] =
4091 cpu_to_le32(cn
->bh
->b_blocknr
);
4097 set_desc_trans_len(desc
, journal
->j_len
);
4098 set_desc_mount_id(desc
, journal
->j_mount_id
);
4099 set_desc_trans_id(desc
, journal
->j_trans_id
);
4100 set_commit_trans_len(commit
, journal
->j_len
);
4102 /* special check in case all buffers in the journal were marked for not logging */
4103 BUG_ON(journal
->j_len
== 0);
4105 /* we're about to dirty all the log blocks, mark the description block
4106 * dirty now too. Don't mark the commit block dirty until all the
4107 * others are on disk
4109 mark_buffer_dirty(d_bh
);
4111 /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
4112 cur_write_start
= journal
->j_start
;
4113 cn
= journal
->j_first
;
4114 jindex
= 1; /* start at one so we don't get the desc again */
4116 clear_buffer_journal_new(cn
->bh
);
4117 /* copy all the real blocks into log area. dirty log blocks */
4118 if (buffer_journaled(cn
->bh
)) {
4119 struct buffer_head
*tmp_bh
;
4123 journal_getblk(p_s_sb
,
4124 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
4127 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
4128 set_buffer_uptodate(tmp_bh
);
4129 page
= cn
->bh
->b_page
;
4131 memcpy(tmp_bh
->b_data
,
4132 addr
+ offset_in_page(cn
->bh
->b_data
),
4135 mark_buffer_dirty(tmp_bh
);
4137 set_buffer_journal_dirty(cn
->bh
);
4138 clear_buffer_journaled(cn
->bh
);
4140 /* JDirty cleared sometime during transaction. don't log this one */
4141 reiserfs_warning(p_s_sb
,
4142 "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!");
4146 free_cnode(p_s_sb
, cn
);
4151 /* we are done with both the c_bh and d_bh, but
4152 ** c_bh must be written after all other commit blocks,
4153 ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
4156 journal
->j_current_jl
= alloc_journal_list(p_s_sb
);
4158 /* now it is safe to insert this transaction on the main list */
4159 list_add_tail(&jl
->j_list
, &journal
->j_journal_list
);
4160 list_add_tail(&jl
->j_working_list
, &journal
->j_working_list
);
4161 journal
->j_num_work_lists
++;
4163 /* reset journal values for the next transaction */
4164 old_start
= journal
->j_start
;
4166 (journal
->j_start
+ journal
->j_len
+
4167 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
);
4168 atomic_set(&(journal
->j_wcount
), 0);
4169 journal
->j_bcount
= 0;
4170 journal
->j_last
= NULL
;
4171 journal
->j_first
= NULL
;
4173 journal
->j_trans_start_time
= 0;
4174 /* check for trans_id overflow */
4175 if (++journal
->j_trans_id
== 0)
4176 journal
->j_trans_id
= 10;
4177 journal
->j_current_jl
->j_trans_id
= journal
->j_trans_id
;
4178 journal
->j_must_wait
= 0;
4179 journal
->j_len_alloc
= 0;
4180 journal
->j_next_full_flush
= 0;
4181 journal
->j_next_async_flush
= 0;
4182 init_journal_hash(p_s_sb
);
4184 // make sure reiserfs_add_jh sees the new current_jl before we
4185 // write out the tails
4188 /* tail conversion targets have to hit the disk before we end the
4189 * transaction. Otherwise a later transaction might repack the tail
4190 * before this transaction commits, leaving the data block unflushed and
4191 * clean, if we crash before the later transaction commits, the data block
4194 if (!list_empty(&jl
->j_tail_bh_list
)) {
4196 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
4197 journal
, jl
, &jl
->j_tail_bh_list
);
4200 BUG_ON(!list_empty(&jl
->j_tail_bh_list
));
4201 up(&jl
->j_commit_lock
);
4203 /* honor the flush wishes from the caller, simple commits can
4204 ** be done outside the journal lock, they are done below
4206 ** if we don't flush the commit list right now, we put it into
4207 ** the work queue so the people waiting on the async progress work
4208 ** queue don't wait for this proc to flush journal lists and such.
4211 flush_commit_list(p_s_sb
, jl
, 1);
4212 flush_journal_list(p_s_sb
, jl
, 1);
4213 } else if (!(jl
->j_state
& LIST_COMMIT_PENDING
))
4214 queue_delayed_work(commit_wq
, &journal
->j_work
, HZ
/ 10);
4216 /* if the next transaction has any chance of wrapping, flush
4217 ** transactions that might get overwritten. If any journal lists are very
4218 ** old flush them as well.
4221 list_for_each_safe(entry
, safe
, &journal
->j_journal_list
) {
4222 temp_jl
= JOURNAL_LIST_ENTRY(entry
);
4223 if (journal
->j_start
<= temp_jl
->j_start
) {
4224 if ((journal
->j_start
+ journal
->j_trans_max
+ 1) >=
4226 flush_used_journal_lists(p_s_sb
, temp_jl
);
4228 } else if ((journal
->j_start
+
4229 journal
->j_trans_max
+ 1) <
4230 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4231 /* if we don't cross into the next transaction and we don't
4232 * wrap, there is no way we can overlap any later transactions
4237 } else if ((journal
->j_start
+
4238 journal
->j_trans_max
+ 1) >
4239 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4240 if (((journal
->j_start
+ journal
->j_trans_max
+ 1) %
4241 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) >=
4243 flush_used_journal_lists(p_s_sb
, temp_jl
);
4246 /* we don't overlap anything from out start to the end of the
4247 * log, and our wrapped portion doesn't overlap anything at
4248 * the start of the log. We can break
4254 flush_old_journal_lists(p_s_sb
);
4256 journal
->j_current_jl
->j_list_bitmap
=
4257 get_list_bitmap(p_s_sb
, journal
->j_current_jl
);
4259 if (!(journal
->j_current_jl
->j_list_bitmap
)) {
4260 reiserfs_panic(p_s_sb
,
4261 "journal-1996: do_journal_end, could not get a list bitmap\n");
4264 atomic_set(&(journal
->j_jlock
), 0);
4265 unlock_journal(p_s_sb
);
4266 /* wake up any body waiting to join. */
4267 clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
4268 wake_up(&(journal
->j_join_wait
));
4270 if (!flush
&& wait_on_commit
&&
4271 journal_list_still_alive(p_s_sb
, commit_trans_id
)) {
4272 flush_commit_list(p_s_sb
, jl
, 1);
4275 reiserfs_check_lock_depth(p_s_sb
, "journal end2");
4277 memset(th
, 0, sizeof(*th
));
4278 /* Re-set th->t_super, so we can properly keep track of how many
4279 * persistent transactions there are. We need to do this so if this
4280 * call is part of a failed restart_transaction, we can free it later */
4281 th
->t_super
= p_s_sb
;
4283 return journal
->j_errno
;
4286 static void __reiserfs_journal_abort_hard(struct super_block
*sb
)
4288 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4289 if (test_bit(J_ABORTED
, &journal
->j_state
))
4292 printk(KERN_CRIT
"REISERFS: Aborting journal for filesystem on %s\n",
4293 reiserfs_bdevname(sb
));
4295 sb
->s_flags
|= MS_RDONLY
;
4296 set_bit(J_ABORTED
, &journal
->j_state
);
4298 #ifdef CONFIG_REISERFS_CHECK
4303 static void __reiserfs_journal_abort_soft(struct super_block
*sb
, int errno
)
4305 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4306 if (test_bit(J_ABORTED
, &journal
->j_state
))
4309 if (!journal
->j_errno
)
4310 journal
->j_errno
= errno
;
4312 __reiserfs_journal_abort_hard(sb
);
4315 void reiserfs_journal_abort(struct super_block
*sb
, int errno
)
4317 return __reiserfs_journal_abort_soft(sb
, errno
);