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>
57 /* gets a struct reiserfs_journal_list * from a list head */
58 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
60 #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
63 /* the number of mounted filesystems. This is used to decide when to
64 ** start and kill the commit workqueue
66 static int reiserfs_mounted_fs_count
;
68 static struct workqueue_struct
*commit_wq
;
70 #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit
72 #define BUFNR 64 /*read ahead */
74 /* cnode stat bits. Move these into reiserfs_fs.h */
76 #define BLOCK_FREED 2 /* this block was freed, and can't be written. */
77 #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */
79 #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */
80 #define BLOCK_DIRTIED 5
82 /* journal list state bits */
83 #define LIST_TOUCHED 1
85 #define LIST_COMMIT_PENDING 4 /* someone will commit this list */
87 /* flags for do_journal_end */
88 #define FLUSH_ALL 1 /* flush commit and real blocks */
89 #define COMMIT_NOW 2 /* end and commit this transaction */
90 #define WAIT 4 /* wait for the log blocks to hit the disk */
92 static int do_journal_end(struct reiserfs_transaction_handle
*,
93 struct super_block
*, unsigned long nblocks
,
95 static int flush_journal_list(struct super_block
*s
,
96 struct reiserfs_journal_list
*jl
, int flushall
);
97 static int flush_commit_list(struct super_block
*s
,
98 struct reiserfs_journal_list
*jl
, int flushall
);
99 static int can_dirty(struct reiserfs_journal_cnode
*cn
);
100 static int journal_join(struct reiserfs_transaction_handle
*th
,
101 struct super_block
*p_s_sb
, unsigned long nblocks
);
102 static int release_journal_dev(struct super_block
*super
,
103 struct reiserfs_journal
*journal
);
104 static int dirty_one_transaction(struct super_block
*s
,
105 struct reiserfs_journal_list
*jl
);
106 static void flush_async_commits(void *p
);
107 static void queue_log_writer(struct super_block
*s
);
109 /* values for join in do_journal_begin_r */
111 JBEGIN_REG
= 0, /* regular journal begin */
112 JBEGIN_JOIN
= 1, /* join the running transaction if at all possible */
113 JBEGIN_ABORT
= 2, /* called from cleanup code, ignores aborted flag */
116 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
117 struct super_block
*p_s_sb
,
118 unsigned long nblocks
, int join
);
120 static void init_journal_hash(struct super_block
*p_s_sb
)
122 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
123 memset(journal
->j_hash_table
, 0,
124 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
128 ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to
129 ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for
132 static int reiserfs_clean_and_file_buffer(struct buffer_head
*bh
)
135 clear_buffer_dirty(bh
);
136 clear_buffer_journal_test(bh
);
141 static void disable_barrier(struct super_block
*s
)
143 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_BARRIER_FLUSH
);
144 printk("reiserfs: disabling flush barriers on %s\n",
145 reiserfs_bdevname(s
));
148 static struct reiserfs_bitmap_node
*allocate_bitmap_node(struct super_block
151 struct reiserfs_bitmap_node
*bn
;
154 bn
= kmalloc(sizeof(struct reiserfs_bitmap_node
), GFP_NOFS
);
158 bn
->data
= kzalloc(p_s_sb
->s_blocksize
, GFP_NOFS
);
164 INIT_LIST_HEAD(&bn
->list
);
168 static struct reiserfs_bitmap_node
*get_bitmap_node(struct super_block
*p_s_sb
)
170 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
171 struct reiserfs_bitmap_node
*bn
= NULL
;
172 struct list_head
*entry
= journal
->j_bitmap_nodes
.next
;
174 journal
->j_used_bitmap_nodes
++;
177 if (entry
!= &journal
->j_bitmap_nodes
) {
178 bn
= list_entry(entry
, struct reiserfs_bitmap_node
, list
);
180 memset(bn
->data
, 0, p_s_sb
->s_blocksize
);
181 journal
->j_free_bitmap_nodes
--;
184 bn
= allocate_bitmap_node(p_s_sb
);
191 static inline void free_bitmap_node(struct super_block
*p_s_sb
,
192 struct reiserfs_bitmap_node
*bn
)
194 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
195 journal
->j_used_bitmap_nodes
--;
196 if (journal
->j_free_bitmap_nodes
> REISERFS_MAX_BITMAP_NODES
) {
200 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
201 journal
->j_free_bitmap_nodes
++;
205 static void allocate_bitmap_nodes(struct super_block
*p_s_sb
)
208 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
209 struct reiserfs_bitmap_node
*bn
= NULL
;
210 for (i
= 0; i
< REISERFS_MIN_BITMAP_NODES
; i
++) {
211 bn
= allocate_bitmap_node(p_s_sb
);
213 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
214 journal
->j_free_bitmap_nodes
++;
216 break; // this is ok, we'll try again when more are needed
221 static int set_bit_in_list_bitmap(struct super_block
*p_s_sb
, int block
,
222 struct reiserfs_list_bitmap
*jb
)
224 int bmap_nr
= block
/ (p_s_sb
->s_blocksize
<< 3);
225 int bit_nr
= block
% (p_s_sb
->s_blocksize
<< 3);
227 if (!jb
->bitmaps
[bmap_nr
]) {
228 jb
->bitmaps
[bmap_nr
] = get_bitmap_node(p_s_sb
);
230 set_bit(bit_nr
, (unsigned long *)jb
->bitmaps
[bmap_nr
]->data
);
234 static void cleanup_bitmap_list(struct super_block
*p_s_sb
,
235 struct reiserfs_list_bitmap
*jb
)
238 if (jb
->bitmaps
== NULL
)
241 for (i
= 0; i
< SB_BMAP_NR(p_s_sb
); i
++) {
242 if (jb
->bitmaps
[i
]) {
243 free_bitmap_node(p_s_sb
, jb
->bitmaps
[i
]);
244 jb
->bitmaps
[i
] = NULL
;
250 ** only call this on FS unmount.
252 static int free_list_bitmaps(struct super_block
*p_s_sb
,
253 struct reiserfs_list_bitmap
*jb_array
)
256 struct reiserfs_list_bitmap
*jb
;
257 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
259 jb
->journal_list
= NULL
;
260 cleanup_bitmap_list(p_s_sb
, jb
);
267 static int free_bitmap_nodes(struct super_block
*p_s_sb
)
269 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
270 struct list_head
*next
= journal
->j_bitmap_nodes
.next
;
271 struct reiserfs_bitmap_node
*bn
;
273 while (next
!= &journal
->j_bitmap_nodes
) {
274 bn
= list_entry(next
, struct reiserfs_bitmap_node
, list
);
278 next
= journal
->j_bitmap_nodes
.next
;
279 journal
->j_free_bitmap_nodes
--;
286 ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
287 ** jb_array is the array to be filled in.
289 int reiserfs_allocate_list_bitmaps(struct super_block
*p_s_sb
,
290 struct reiserfs_list_bitmap
*jb_array
,
295 struct reiserfs_list_bitmap
*jb
;
296 int mem
= bmap_nr
* sizeof(struct reiserfs_bitmap_node
*);
298 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
300 jb
->journal_list
= NULL
;
301 jb
->bitmaps
= vmalloc(mem
);
303 reiserfs_warning(p_s_sb
,
304 "clm-2000, unable to allocate bitmaps for journal lists");
308 memset(jb
->bitmaps
, 0, mem
);
311 free_list_bitmaps(p_s_sb
, jb_array
);
318 ** find an available list bitmap. If you can't find one, flush a commit list
321 static struct reiserfs_list_bitmap
*get_list_bitmap(struct super_block
*p_s_sb
,
322 struct reiserfs_journal_list
326 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
327 struct reiserfs_list_bitmap
*jb
= NULL
;
329 for (j
= 0; j
< (JOURNAL_NUM_BITMAPS
* 3); j
++) {
330 i
= journal
->j_list_bitmap_index
;
331 journal
->j_list_bitmap_index
= (i
+ 1) % JOURNAL_NUM_BITMAPS
;
332 jb
= journal
->j_list_bitmap
+ i
;
333 if (journal
->j_list_bitmap
[i
].journal_list
) {
334 flush_commit_list(p_s_sb
,
335 journal
->j_list_bitmap
[i
].
337 if (!journal
->j_list_bitmap
[i
].journal_list
) {
344 if (jb
->journal_list
) { /* double check to make sure if flushed correctly */
347 jb
->journal_list
= jl
;
352 ** allocates a new chunk of X nodes, and links them all together as a list.
353 ** Uses the cnode->next and cnode->prev pointers
354 ** returns NULL on failure
356 static struct reiserfs_journal_cnode
*allocate_cnodes(int num_cnodes
)
358 struct reiserfs_journal_cnode
*head
;
360 if (num_cnodes
<= 0) {
363 head
= vmalloc(num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
367 memset(head
, 0, num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
369 head
[0].next
= head
+ 1;
370 for (i
= 1; i
< num_cnodes
; i
++) {
371 head
[i
].prev
= head
+ (i
- 1);
372 head
[i
].next
= head
+ (i
+ 1); /* if last one, overwrite it after the if */
374 head
[num_cnodes
- 1].next
= NULL
;
379 ** pulls a cnode off the free list, or returns NULL on failure
381 static struct reiserfs_journal_cnode
*get_cnode(struct super_block
*p_s_sb
)
383 struct reiserfs_journal_cnode
*cn
;
384 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
386 reiserfs_check_lock_depth(p_s_sb
, "get_cnode");
388 if (journal
->j_cnode_free
<= 0) {
391 journal
->j_cnode_used
++;
392 journal
->j_cnode_free
--;
393 cn
= journal
->j_cnode_free_list
;
398 cn
->next
->prev
= NULL
;
400 journal
->j_cnode_free_list
= cn
->next
;
401 memset(cn
, 0, sizeof(struct reiserfs_journal_cnode
));
406 ** returns a cnode to the free list
408 static void free_cnode(struct super_block
*p_s_sb
,
409 struct reiserfs_journal_cnode
*cn
)
411 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
413 reiserfs_check_lock_depth(p_s_sb
, "free_cnode");
415 journal
->j_cnode_used
--;
416 journal
->j_cnode_free
++;
417 /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
418 cn
->next
= journal
->j_cnode_free_list
;
419 if (journal
->j_cnode_free_list
) {
420 journal
->j_cnode_free_list
->prev
= cn
;
422 cn
->prev
= NULL
; /* not needed with the memset, but I might kill the memset, and forget to do this */
423 journal
->j_cnode_free_list
= cn
;
426 static void clear_prepared_bits(struct buffer_head
*bh
)
428 clear_buffer_journal_prepared(bh
);
429 clear_buffer_journal_restore_dirty(bh
);
432 /* utility function to force a BUG if it is called without the big
433 ** kernel lock held. caller is the string printed just before calling BUG()
435 void reiserfs_check_lock_depth(struct super_block
*sb
, char *caller
)
438 if (current
->lock_depth
< 0) {
439 reiserfs_panic(sb
, "%s called without kernel lock held",
447 /* return a cnode with same dev, block number and size in table, or null if not found */
448 static inline struct reiserfs_journal_cnode
*get_journal_hash_dev(struct
452 reiserfs_journal_cnode
456 struct reiserfs_journal_cnode
*cn
;
457 cn
= journal_hash(table
, sb
, bl
);
459 if (cn
->blocknr
== bl
&& cn
->sb
== sb
)
463 return (struct reiserfs_journal_cnode
*)0;
467 ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated
468 ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
469 ** being overwritten by a replay after crashing.
471 ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting
472 ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make
473 ** sure you never write the block without logging it.
475 ** next_zero_bit is a suggestion about the next block to try for find_forward.
476 ** when bl is rejected because it is set in a journal list bitmap, we search
477 ** for the next zero bit in the bitmap that rejected bl. Then, we return that
478 ** through next_zero_bit for find_forward to try.
480 ** Just because we return something in next_zero_bit does not mean we won't
481 ** reject it on the next call to reiserfs_in_journal
484 int reiserfs_in_journal(struct super_block
*p_s_sb
,
485 int bmap_nr
, int bit_nr
, int search_all
,
486 b_blocknr_t
* next_zero_bit
)
488 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
489 struct reiserfs_journal_cnode
*cn
;
490 struct reiserfs_list_bitmap
*jb
;
494 *next_zero_bit
= 0; /* always start this at zero. */
496 PROC_INFO_INC(p_s_sb
, journal
.in_journal
);
497 /* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
498 ** if we crash before the transaction that freed it commits, this transaction won't
499 ** have committed either, and the block will never be written
502 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
503 PROC_INFO_INC(p_s_sb
, journal
.in_journal_bitmap
);
504 jb
= journal
->j_list_bitmap
+ i
;
505 if (jb
->journal_list
&& jb
->bitmaps
[bmap_nr
] &&
507 (unsigned long *)jb
->bitmaps
[bmap_nr
]->
510 find_next_zero_bit((unsigned long *)
511 (jb
->bitmaps
[bmap_nr
]->
513 p_s_sb
->s_blocksize
<< 3,
520 bl
= bmap_nr
* (p_s_sb
->s_blocksize
<< 3) + bit_nr
;
521 /* is it in any old transactions? */
524 get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
, bl
))) {
528 /* is it in the current transaction. This should never happen */
529 if ((cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, bl
))) {
534 PROC_INFO_INC(p_s_sb
, journal
.in_journal_reusable
);
539 /* insert cn into table
541 static inline void insert_journal_hash(struct reiserfs_journal_cnode
**table
,
542 struct reiserfs_journal_cnode
*cn
)
544 struct reiserfs_journal_cnode
*cn_orig
;
546 cn_orig
= journal_hash(table
, cn
->sb
, cn
->blocknr
);
552 journal_hash(table
, cn
->sb
, cn
->blocknr
) = cn
;
555 /* lock the current transaction */
556 static inline void lock_journal(struct super_block
*p_s_sb
)
558 PROC_INFO_INC(p_s_sb
, journal
.lock_journal
);
559 down(&SB_JOURNAL(p_s_sb
)->j_lock
);
562 /* unlock the current transaction */
563 static inline void unlock_journal(struct super_block
*p_s_sb
)
565 up(&SB_JOURNAL(p_s_sb
)->j_lock
);
568 static inline void get_journal_list(struct reiserfs_journal_list
*jl
)
573 static inline void put_journal_list(struct super_block
*s
,
574 struct reiserfs_journal_list
*jl
)
576 if (jl
->j_refcount
< 1) {
577 reiserfs_panic(s
, "trans id %lu, refcount at %d",
578 jl
->j_trans_id
, jl
->j_refcount
);
580 if (--jl
->j_refcount
== 0)
585 ** this used to be much more involved, and I'm keeping it just in case things get ugly again.
586 ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
589 static void cleanup_freed_for_journal_list(struct super_block
*p_s_sb
,
590 struct reiserfs_journal_list
*jl
)
593 struct reiserfs_list_bitmap
*jb
= jl
->j_list_bitmap
;
595 cleanup_bitmap_list(p_s_sb
, jb
);
597 jl
->j_list_bitmap
->journal_list
= NULL
;
598 jl
->j_list_bitmap
= NULL
;
601 static int journal_list_still_alive(struct super_block
*s
,
602 unsigned long trans_id
)
604 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
605 struct list_head
*entry
= &journal
->j_journal_list
;
606 struct reiserfs_journal_list
*jl
;
608 if (!list_empty(entry
)) {
609 jl
= JOURNAL_LIST_ENTRY(entry
->next
);
610 if (jl
->j_trans_id
<= trans_id
) {
617 static void reiserfs_end_buffer_io_sync(struct buffer_head
*bh
, int uptodate
)
619 char b
[BDEVNAME_SIZE
];
621 if (buffer_journaled(bh
)) {
622 reiserfs_warning(NULL
,
623 "clm-2084: pinned buffer %lu:%s sent to disk",
624 bh
->b_blocknr
, bdevname(bh
->b_bdev
, b
));
627 set_buffer_uptodate(bh
);
629 clear_buffer_uptodate(bh
);
634 static void reiserfs_end_ordered_io(struct buffer_head
*bh
, int uptodate
)
637 set_buffer_uptodate(bh
);
639 clear_buffer_uptodate(bh
);
644 static void submit_logged_buffer(struct buffer_head
*bh
)
647 bh
->b_end_io
= reiserfs_end_buffer_io_sync
;
648 clear_buffer_journal_new(bh
);
649 clear_buffer_dirty(bh
);
650 if (!test_clear_buffer_journal_test(bh
))
652 if (!buffer_uptodate(bh
))
654 submit_bh(WRITE
, bh
);
657 static void submit_ordered_buffer(struct buffer_head
*bh
)
660 bh
->b_end_io
= reiserfs_end_ordered_io
;
661 clear_buffer_dirty(bh
);
662 if (!buffer_uptodate(bh
))
664 submit_bh(WRITE
, bh
);
667 static int submit_barrier_buffer(struct buffer_head
*bh
)
670 bh
->b_end_io
= reiserfs_end_ordered_io
;
671 clear_buffer_dirty(bh
);
672 if (!buffer_uptodate(bh
))
674 return submit_bh(WRITE_BARRIER
, bh
);
677 static void check_barrier_completion(struct super_block
*s
,
678 struct buffer_head
*bh
)
680 if (buffer_eopnotsupp(bh
)) {
681 clear_buffer_eopnotsupp(bh
);
683 set_buffer_uptodate(bh
);
684 set_buffer_dirty(bh
);
685 sync_dirty_buffer(bh
);
689 #define CHUNK_SIZE 32
690 struct buffer_chunk
{
691 struct buffer_head
*bh
[CHUNK_SIZE
];
695 static void write_chunk(struct buffer_chunk
*chunk
)
699 for (i
= 0; i
< chunk
->nr
; i
++) {
700 submit_logged_buffer(chunk
->bh
[i
]);
706 static void write_ordered_chunk(struct buffer_chunk
*chunk
)
710 for (i
= 0; i
< chunk
->nr
; i
++) {
711 submit_ordered_buffer(chunk
->bh
[i
]);
717 static int add_to_chunk(struct buffer_chunk
*chunk
, struct buffer_head
*bh
,
718 spinlock_t
* lock
, void (fn
) (struct buffer_chunk
*))
721 if (chunk
->nr
>= CHUNK_SIZE
)
723 chunk
->bh
[chunk
->nr
++] = bh
;
724 if (chunk
->nr
>= CHUNK_SIZE
) {
735 static atomic_t nr_reiserfs_jh
= ATOMIC_INIT(0);
736 static struct reiserfs_jh
*alloc_jh(void)
738 struct reiserfs_jh
*jh
;
740 jh
= kmalloc(sizeof(*jh
), GFP_NOFS
);
742 atomic_inc(&nr_reiserfs_jh
);
750 * we want to free the jh when the buffer has been written
753 void reiserfs_free_jh(struct buffer_head
*bh
)
755 struct reiserfs_jh
*jh
;
759 bh
->b_private
= NULL
;
761 list_del_init(&jh
->list
);
763 if (atomic_read(&nr_reiserfs_jh
) <= 0)
765 atomic_dec(&nr_reiserfs_jh
);
770 static inline int __add_jh(struct reiserfs_journal
*j
, struct buffer_head
*bh
,
773 struct reiserfs_jh
*jh
;
776 spin_lock(&j
->j_dirty_buffers_lock
);
777 if (!bh
->b_private
) {
778 spin_unlock(&j
->j_dirty_buffers_lock
);
782 list_del_init(&jh
->list
);
787 spin_lock(&j
->j_dirty_buffers_lock
);
788 /* buffer must be locked for __add_jh, should be able to have
789 * two adds at the same time
796 jh
->jl
= j
->j_current_jl
;
798 list_add_tail(&jh
->list
, &jh
->jl
->j_tail_bh_list
);
800 list_add_tail(&jh
->list
, &jh
->jl
->j_bh_list
);
802 spin_unlock(&j
->j_dirty_buffers_lock
);
806 int reiserfs_add_tail_list(struct inode
*inode
, struct buffer_head
*bh
)
808 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 1);
810 int reiserfs_add_ordered_list(struct inode
*inode
, struct buffer_head
*bh
)
812 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 0);
815 #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
816 static int write_ordered_buffers(spinlock_t
* lock
,
817 struct reiserfs_journal
*j
,
818 struct reiserfs_journal_list
*jl
,
819 struct list_head
*list
)
821 struct buffer_head
*bh
;
822 struct reiserfs_jh
*jh
;
823 int ret
= j
->j_errno
;
824 struct buffer_chunk chunk
;
825 struct list_head tmp
;
826 INIT_LIST_HEAD(&tmp
);
830 while (!list_empty(list
)) {
831 jh
= JH_ENTRY(list
->next
);
834 if (test_set_buffer_locked(bh
)) {
835 if (!buffer_dirty(bh
)) {
836 list_move(&jh
->list
, &tmp
);
841 write_ordered_chunk(&chunk
);
847 /* in theory, dirty non-uptodate buffers should never get here,
848 * but the upper layer io error paths still have a few quirks.
849 * Handle them here as gracefully as we can
851 if (!buffer_uptodate(bh
) && buffer_dirty(bh
)) {
852 clear_buffer_dirty(bh
);
855 if (buffer_dirty(bh
)) {
856 list_move(&jh
->list
, &tmp
);
857 add_to_chunk(&chunk
, bh
, lock
, write_ordered_chunk
);
859 reiserfs_free_jh(bh
);
864 cond_resched_lock(lock
);
868 write_ordered_chunk(&chunk
);
871 while (!list_empty(&tmp
)) {
872 jh
= JH_ENTRY(tmp
.prev
);
875 reiserfs_free_jh(bh
);
877 if (buffer_locked(bh
)) {
882 if (!buffer_uptodate(bh
)) {
885 /* ugly interaction with invalidatepage here.
886 * reiserfs_invalidate_page will pin any buffer that has a valid
887 * journal head from an older transaction. If someone else sets
888 * our buffer dirty after we write it in the first loop, and
889 * then someone truncates the page away, nobody will ever write
890 * the buffer. We're safe if we write the page one last time
891 * after freeing the journal header.
893 if (buffer_dirty(bh
) && unlikely(bh
->b_page
->mapping
== NULL
)) {
895 ll_rw_block(WRITE
, 1, &bh
);
899 cond_resched_lock(lock
);
905 static int flush_older_commits(struct super_block
*s
,
906 struct reiserfs_journal_list
*jl
)
908 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
909 struct reiserfs_journal_list
*other_jl
;
910 struct reiserfs_journal_list
*first_jl
;
911 struct list_head
*entry
;
912 unsigned long trans_id
= jl
->j_trans_id
;
913 unsigned long other_trans_id
;
914 unsigned long first_trans_id
;
918 * first we walk backwards to find the oldest uncommitted transation
921 entry
= jl
->j_list
.prev
;
923 other_jl
= JOURNAL_LIST_ENTRY(entry
);
924 if (entry
== &journal
->j_journal_list
||
925 atomic_read(&other_jl
->j_older_commits_done
))
929 entry
= other_jl
->j_list
.prev
;
932 /* if we didn't find any older uncommitted transactions, return now */
933 if (first_jl
== jl
) {
937 first_trans_id
= first_jl
->j_trans_id
;
939 entry
= &first_jl
->j_list
;
941 other_jl
= JOURNAL_LIST_ENTRY(entry
);
942 other_trans_id
= other_jl
->j_trans_id
;
944 if (other_trans_id
< trans_id
) {
945 if (atomic_read(&other_jl
->j_commit_left
) != 0) {
946 flush_commit_list(s
, other_jl
, 0);
948 /* list we were called with is gone, return */
949 if (!journal_list_still_alive(s
, trans_id
))
952 /* the one we just flushed is gone, this means all
953 * older lists are also gone, so first_jl is no longer
954 * valid either. Go back to the beginning.
956 if (!journal_list_still_alive
957 (s
, other_trans_id
)) {
962 if (entry
== &journal
->j_journal_list
)
970 int reiserfs_async_progress_wait(struct super_block
*s
)
973 struct reiserfs_journal
*j
= SB_JOURNAL(s
);
974 if (atomic_read(&j
->j_async_throttle
))
975 blk_congestion_wait(WRITE
, HZ
/ 10);
980 ** if this journal list still has commit blocks unflushed, send them to disk.
982 ** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
983 ** Before the commit block can by written, every other log block must be safely on disk
986 static int flush_commit_list(struct super_block
*s
,
987 struct reiserfs_journal_list
*jl
, int flushall
)
991 struct buffer_head
*tbh
= NULL
;
992 unsigned long trans_id
= jl
->j_trans_id
;
993 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
998 reiserfs_check_lock_depth(s
, "flush_commit_list");
1000 if (atomic_read(&jl
->j_older_commits_done
)) {
1006 /* before we can put our commit blocks on disk, we have to make sure everyone older than
1007 ** us is on disk too
1009 BUG_ON(jl
->j_len
<= 0);
1010 BUG_ON(trans_id
== journal
->j_trans_id
);
1012 get_journal_list(jl
);
1014 if (flush_older_commits(s
, jl
) == 1) {
1015 /* list disappeared during flush_older_commits. return */
1020 /* make sure nobody is trying to flush this one at the same time */
1021 down(&jl
->j_commit_lock
);
1022 if (!journal_list_still_alive(s
, trans_id
)) {
1023 up(&jl
->j_commit_lock
);
1026 BUG_ON(jl
->j_trans_id
== 0);
1028 /* this commit is done, exit */
1029 if (atomic_read(&(jl
->j_commit_left
)) <= 0) {
1031 atomic_set(&(jl
->j_older_commits_done
), 1);
1033 up(&jl
->j_commit_lock
);
1037 if (!list_empty(&jl
->j_bh_list
)) {
1040 ret
= write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
1041 journal
, jl
, &jl
->j_bh_list
);
1042 if (ret
< 0 && retval
== 0)
1046 BUG_ON(!list_empty(&jl
->j_bh_list
));
1048 * for the description block and all the log blocks, submit any buffers
1049 * that haven't already reached the disk. Try to write at least 256
1050 * log blocks. later on, we will only wait on blocks that correspond
1051 * to this transaction, but while we're unplugging we might as well
1052 * get a chunk of data on there.
1054 atomic_inc(&journal
->j_async_throttle
);
1055 write_len
= jl
->j_len
+ 1;
1056 if (write_len
< 256)
1058 for (i
= 0 ; i
< write_len
; i
++) {
1059 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) + (jl
->j_start
+ i
) %
1060 SB_ONDISK_JOURNAL_SIZE(s
);
1061 tbh
= journal_find_get_block(s
, bn
);
1063 if (buffer_dirty(tbh
))
1064 ll_rw_block(WRITE
, 1, &tbh
) ;
1068 atomic_dec(&journal
->j_async_throttle
);
1070 /* We're skipping the commit if there's an error */
1071 if (retval
|| reiserfs_is_journal_aborted(journal
))
1074 /* wait on everything written so far before writing the commit
1075 * if we are in barrier mode, send the commit down now
1077 barrier
= reiserfs_barrier_flush(s
);
1080 lock_buffer(jl
->j_commit_bh
);
1081 ret
= submit_barrier_buffer(jl
->j_commit_bh
);
1082 if (ret
== -EOPNOTSUPP
) {
1083 set_buffer_uptodate(jl
->j_commit_bh
);
1088 for (i
= 0; i
< (jl
->j_len
+ 1); i
++) {
1089 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) +
1090 (jl
->j_start
+ i
) % SB_ONDISK_JOURNAL_SIZE(s
);
1091 tbh
= journal_find_get_block(s
, bn
);
1092 wait_on_buffer(tbh
);
1093 // since we're using ll_rw_blk above, it might have skipped over
1094 // a locked buffer. Double check here
1096 if (buffer_dirty(tbh
)) /* redundant, sync_dirty_buffer() checks */
1097 sync_dirty_buffer(tbh
);
1098 if (unlikely(!buffer_uptodate(tbh
))) {
1099 #ifdef CONFIG_REISERFS_CHECK
1100 reiserfs_warning(s
, "journal-601, buffer write failed");
1104 put_bh(tbh
); /* once for journal_find_get_block */
1105 put_bh(tbh
); /* once due to original getblk in do_journal_end */
1106 atomic_dec(&(jl
->j_commit_left
));
1109 BUG_ON(atomic_read(&(jl
->j_commit_left
)) != 1);
1112 /* If there was a write error in the journal - we can't commit
1113 * this transaction - it will be invalid and, if successful,
1114 * will just end up propogating the write error out to
1115 * the file system. */
1116 if (likely(!retval
&& !reiserfs_is_journal_aborted (journal
))) {
1117 if (buffer_dirty(jl
->j_commit_bh
))
1119 mark_buffer_dirty(jl
->j_commit_bh
) ;
1120 sync_dirty_buffer(jl
->j_commit_bh
) ;
1123 wait_on_buffer(jl
->j_commit_bh
);
1125 check_barrier_completion(s
, jl
->j_commit_bh
);
1127 /* If there was a write error in the journal - we can't commit this
1128 * transaction - it will be invalid and, if successful, will just end
1129 * up propogating the write error out to the filesystem. */
1130 if (unlikely(!buffer_uptodate(jl
->j_commit_bh
))) {
1131 #ifdef CONFIG_REISERFS_CHECK
1132 reiserfs_warning(s
, "journal-615: buffer write failed");
1136 bforget(jl
->j_commit_bh
);
1137 if (journal
->j_last_commit_id
!= 0 &&
1138 (jl
->j_trans_id
- journal
->j_last_commit_id
) != 1) {
1139 reiserfs_warning(s
, "clm-2200: last commit %lu, current %lu",
1140 journal
->j_last_commit_id
, jl
->j_trans_id
);
1142 journal
->j_last_commit_id
= jl
->j_trans_id
;
1144 /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */
1145 cleanup_freed_for_journal_list(s
, jl
);
1147 retval
= retval
? retval
: journal
->j_errno
;
1149 /* mark the metadata dirty */
1151 dirty_one_transaction(s
, jl
);
1152 atomic_dec(&(jl
->j_commit_left
));
1155 atomic_set(&(jl
->j_older_commits_done
), 1);
1157 up(&jl
->j_commit_lock
);
1159 put_journal_list(s
, jl
);
1162 reiserfs_abort(s
, retval
, "Journal write error in %s",
1169 ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or
1170 ** returns NULL if it can't find anything
1172 static struct reiserfs_journal_list
*find_newer_jl_for_cn(struct
1173 reiserfs_journal_cnode
1176 struct super_block
*sb
= cn
->sb
;
1177 b_blocknr_t blocknr
= cn
->blocknr
;
1181 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
) {
1189 static int newer_jl_done(struct reiserfs_journal_cnode
*cn
)
1191 struct super_block
*sb
= cn
->sb
;
1192 b_blocknr_t blocknr
= cn
->blocknr
;
1196 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
&&
1197 atomic_read(&cn
->jlist
->j_commit_left
) != 0)
1204 static void remove_journal_hash(struct super_block
*,
1205 struct reiserfs_journal_cnode
**,
1206 struct reiserfs_journal_list
*, unsigned long,
1210 ** once all the real blocks have been flushed, it is safe to remove them from the
1211 ** journal list for this transaction. Aside from freeing the cnode, this also allows the
1212 ** block to be reallocated for data blocks if it had been deleted.
1214 static void remove_all_from_journal_list(struct super_block
*p_s_sb
,
1215 struct reiserfs_journal_list
*jl
,
1218 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1219 struct reiserfs_journal_cnode
*cn
, *last
;
1220 cn
= jl
->j_realblock
;
1222 /* which is better, to lock once around the whole loop, or
1223 ** to lock for each call to remove_journal_hash?
1226 if (cn
->blocknr
!= 0) {
1228 reiserfs_warning(p_s_sb
,
1229 "block %u, bh is %d, state %ld",
1230 cn
->blocknr
, cn
->bh
? 1 : 0,
1234 remove_journal_hash(p_s_sb
, journal
->j_list_hash_table
,
1235 jl
, cn
->blocknr
, 1);
1239 free_cnode(p_s_sb
, last
);
1241 jl
->j_realblock
= NULL
;
1245 ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
1246 ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
1247 ** releasing blocks in this transaction for reuse as data blocks.
1248 ** called by flush_journal_list, before it calls remove_all_from_journal_list
1251 static int _update_journal_header_block(struct super_block
*p_s_sb
,
1252 unsigned long offset
,
1253 unsigned long trans_id
)
1255 struct reiserfs_journal_header
*jh
;
1256 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1258 if (reiserfs_is_journal_aborted(journal
))
1261 if (trans_id
>= journal
->j_last_flush_trans_id
) {
1262 if (buffer_locked((journal
->j_header_bh
))) {
1263 wait_on_buffer((journal
->j_header_bh
));
1264 if (unlikely(!buffer_uptodate(journal
->j_header_bh
))) {
1265 #ifdef CONFIG_REISERFS_CHECK
1266 reiserfs_warning(p_s_sb
,
1267 "journal-699: buffer write failed");
1272 journal
->j_last_flush_trans_id
= trans_id
;
1273 journal
->j_first_unflushed_offset
= offset
;
1274 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->
1276 jh
->j_last_flush_trans_id
= cpu_to_le32(trans_id
);
1277 jh
->j_first_unflushed_offset
= cpu_to_le32(offset
);
1278 jh
->j_mount_id
= cpu_to_le32(journal
->j_mount_id
);
1280 if (reiserfs_barrier_flush(p_s_sb
)) {
1282 lock_buffer(journal
->j_header_bh
);
1283 ret
= submit_barrier_buffer(journal
->j_header_bh
);
1284 if (ret
== -EOPNOTSUPP
) {
1285 set_buffer_uptodate(journal
->j_header_bh
);
1286 disable_barrier(p_s_sb
);
1289 wait_on_buffer(journal
->j_header_bh
);
1290 check_barrier_completion(p_s_sb
, journal
->j_header_bh
);
1293 set_buffer_dirty(journal
->j_header_bh
);
1294 sync_dirty_buffer(journal
->j_header_bh
);
1296 if (!buffer_uptodate(journal
->j_header_bh
)) {
1297 reiserfs_warning(p_s_sb
,
1298 "journal-837: IO error during journal replay");
1305 static int update_journal_header_block(struct super_block
*p_s_sb
,
1306 unsigned long offset
,
1307 unsigned long trans_id
)
1309 return _update_journal_header_block(p_s_sb
, offset
, trans_id
);
1313 ** flush any and all journal lists older than you are
1314 ** can only be called from flush_journal_list
1316 static int flush_older_journal_lists(struct super_block
*p_s_sb
,
1317 struct reiserfs_journal_list
*jl
)
1319 struct list_head
*entry
;
1320 struct reiserfs_journal_list
*other_jl
;
1321 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1322 unsigned long trans_id
= jl
->j_trans_id
;
1324 /* we know we are the only ones flushing things, no extra race
1325 * protection is required.
1328 entry
= journal
->j_journal_list
.next
;
1330 if (entry
== &journal
->j_journal_list
)
1332 other_jl
= JOURNAL_LIST_ENTRY(entry
);
1333 if (other_jl
->j_trans_id
< trans_id
) {
1334 BUG_ON(other_jl
->j_refcount
<= 0);
1335 /* do not flush all */
1336 flush_journal_list(p_s_sb
, other_jl
, 0);
1338 /* other_jl is now deleted from the list */
1344 static void del_from_work_list(struct super_block
*s
,
1345 struct reiserfs_journal_list
*jl
)
1347 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1348 if (!list_empty(&jl
->j_working_list
)) {
1349 list_del_init(&jl
->j_working_list
);
1350 journal
->j_num_work_lists
--;
1354 /* flush a journal list, both commit and real blocks
1356 ** always set flushall to 1, unless you are calling from inside
1357 ** flush_journal_list
1359 ** IMPORTANT. This can only be called while there are no journal writers,
1360 ** and the journal is locked. That means it can only be called from
1361 ** do_journal_end, or by journal_release
1363 static int flush_journal_list(struct super_block
*s
,
1364 struct reiserfs_journal_list
*jl
, int flushall
)
1366 struct reiserfs_journal_list
*pjl
;
1367 struct reiserfs_journal_cnode
*cn
, *last
;
1371 struct buffer_head
*saved_bh
;
1372 unsigned long j_len_saved
= jl
->j_len
;
1373 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1376 BUG_ON(j_len_saved
<= 0);
1378 if (atomic_read(&journal
->j_wcount
) != 0) {
1380 "clm-2048: flush_journal_list called with wcount %d",
1381 atomic_read(&journal
->j_wcount
));
1383 BUG_ON(jl
->j_trans_id
== 0);
1385 /* if flushall == 0, the lock is already held */
1387 down(&journal
->j_flush_sem
);
1388 } else if (!down_trylock(&journal
->j_flush_sem
)) {
1393 if (j_len_saved
> journal
->j_trans_max
) {
1395 "journal-715: flush_journal_list, length is %lu, trans id %lu\n",
1396 j_len_saved
, jl
->j_trans_id
);
1402 /* if all the work is already done, get out of here */
1403 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1404 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1405 goto flush_older_and_return
;
1408 /* start by putting the commit list on disk. This will also flush
1409 ** the commit lists of any olders transactions
1411 flush_commit_list(s
, jl
, 1);
1413 if (!(jl
->j_state
& LIST_DIRTY
)
1414 && !reiserfs_is_journal_aborted(journal
))
1417 /* are we done now? */
1418 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1419 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1420 goto flush_older_and_return
;
1423 /* loop through each cnode, see if we need to write it,
1424 ** or wait on a more recent transaction, or just ignore it
1426 if (atomic_read(&(journal
->j_wcount
)) != 0) {
1428 "journal-844: panic journal list is flushing, wcount is not 0\n");
1430 cn
= jl
->j_realblock
;
1435 /* blocknr of 0 is no longer in the hash, ignore it */
1436 if (cn
->blocknr
== 0) {
1440 /* This transaction failed commit. Don't write out to the disk */
1441 if (!(jl
->j_state
& LIST_DIRTY
))
1444 pjl
= find_newer_jl_for_cn(cn
);
1445 /* the order is important here. We check pjl to make sure we
1446 ** don't clear BH_JDirty_wait if we aren't the one writing this
1449 if (!pjl
&& cn
->bh
) {
1452 /* we do this to make sure nobody releases the buffer while
1453 ** we are working with it
1457 if (buffer_journal_dirty(saved_bh
)) {
1458 BUG_ON(!can_dirty(cn
));
1461 } else if (can_dirty(cn
)) {
1462 /* everything with !pjl && jwait should be writable */
1467 /* if someone has this block in a newer transaction, just make
1468 ** sure they are commited, and don't try writing it to disk
1471 if (atomic_read(&pjl
->j_commit_left
))
1472 flush_commit_list(s
, pjl
, 1);
1476 /* bh == NULL when the block got to disk on its own, OR,
1477 ** the block got freed in a future transaction
1479 if (saved_bh
== NULL
) {
1483 /* this should never happen. kupdate_one_transaction has this list
1484 ** locked while it works, so we should never see a buffer here that
1485 ** is not marked JDirty_wait
1487 if ((!was_jwait
) && !buffer_locked(saved_bh
)) {
1489 "journal-813: BAD! buffer %llu %cdirty %cjwait, "
1490 "not in a newer tranasction",
1491 (unsigned long long)saved_bh
->
1492 b_blocknr
, was_dirty
? ' ' : '!',
1493 was_jwait
? ' ' : '!');
1496 /* we inc again because saved_bh gets decremented at free_cnode */
1498 set_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
);
1499 lock_buffer(saved_bh
);
1500 BUG_ON(cn
->blocknr
!= saved_bh
->b_blocknr
);
1501 if (buffer_dirty(saved_bh
))
1502 submit_logged_buffer(saved_bh
);
1504 unlock_buffer(saved_bh
);
1508 "clm-2082: Unable to flush buffer %llu in %s",
1509 (unsigned long long)saved_bh
->
1510 b_blocknr
, __FUNCTION__
);
1516 /* we incremented this to keep others from taking the buffer head away */
1518 if (atomic_read(&(saved_bh
->b_count
)) < 0) {
1520 "journal-945: saved_bh->b_count < 0");
1525 cn
= jl
->j_realblock
;
1527 if (test_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
)) {
1530 "journal-1011: cn->bh is NULL\n");
1532 wait_on_buffer(cn
->bh
);
1535 "journal-1012: cn->bh is NULL\n");
1537 if (unlikely(!buffer_uptodate(cn
->bh
))) {
1538 #ifdef CONFIG_REISERFS_CHECK
1540 "journal-949: buffer write failed\n");
1544 /* note, we must clear the JDirty_wait bit after the up to date
1545 ** check, otherwise we race against our flushpage routine
1547 BUG_ON(!test_clear_buffer_journal_dirty
1550 /* undo the inc from journal_mark_dirty */
1559 reiserfs_abort(s
, -EIO
,
1560 "Write error while pushing transaction to disk in %s",
1562 flush_older_and_return
:
1564 /* before we can update the journal header block, we _must_ flush all
1565 ** real blocks from all older transactions to disk. This is because
1566 ** once the header block is updated, this transaction will not be
1567 ** replayed after a crash
1570 flush_older_journal_lists(s
, jl
);
1573 err
= journal
->j_errno
;
1574 /* before we can remove everything from the hash tables for this
1575 ** transaction, we must make sure it can never be replayed
1577 ** since we are only called from do_journal_end, we know for sure there
1578 ** are no allocations going on while we are flushing journal lists. So,
1579 ** we only need to update the journal header block for the last list
1582 if (!err
&& flushall
) {
1584 update_journal_header_block(s
,
1585 (jl
->j_start
+ jl
->j_len
+
1586 2) % SB_ONDISK_JOURNAL_SIZE(s
),
1589 reiserfs_abort(s
, -EIO
,
1590 "Write error while updating journal header in %s",
1593 remove_all_from_journal_list(s
, jl
, 0);
1594 list_del_init(&jl
->j_list
);
1595 journal
->j_num_lists
--;
1596 del_from_work_list(s
, jl
);
1598 if (journal
->j_last_flush_id
!= 0 &&
1599 (jl
->j_trans_id
- journal
->j_last_flush_id
) != 1) {
1600 reiserfs_warning(s
, "clm-2201: last flush %lu, current %lu",
1601 journal
->j_last_flush_id
, jl
->j_trans_id
);
1603 journal
->j_last_flush_id
= jl
->j_trans_id
;
1605 /* not strictly required since we are freeing the list, but it should
1606 * help find code using dead lists later on
1609 atomic_set(&(jl
->j_nonzerolen
), 0);
1611 jl
->j_realblock
= NULL
;
1612 jl
->j_commit_bh
= NULL
;
1615 put_journal_list(s
, jl
);
1617 up(&journal
->j_flush_sem
);
1622 static int test_transaction(struct super_block
*s
,
1623 struct reiserfs_journal_list
*jl
)
1625 struct reiserfs_journal_cnode
*cn
;
1627 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0)
1630 cn
= jl
->j_realblock
;
1632 /* if the blocknr == 0, this has been cleared from the hash,
1635 if (cn
->blocknr
== 0) {
1638 if (cn
->bh
&& !newer_jl_done(cn
))
1647 static int write_one_transaction(struct super_block
*s
,
1648 struct reiserfs_journal_list
*jl
,
1649 struct buffer_chunk
*chunk
)
1651 struct reiserfs_journal_cnode
*cn
;
1654 jl
->j_state
|= LIST_TOUCHED
;
1655 del_from_work_list(s
, jl
);
1656 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0) {
1660 cn
= jl
->j_realblock
;
1662 /* if the blocknr == 0, this has been cleared from the hash,
1665 if (cn
->blocknr
== 0) {
1668 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(cn
->bh
)) {
1669 struct buffer_head
*tmp_bh
;
1670 /* we can race against journal_mark_freed when we try
1671 * to lock_buffer(cn->bh), so we have to inc the buffer
1672 * count, and recheck things after locking
1676 lock_buffer(tmp_bh
);
1677 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(tmp_bh
)) {
1678 if (!buffer_journal_dirty(tmp_bh
) ||
1679 buffer_journal_prepared(tmp_bh
))
1681 add_to_chunk(chunk
, tmp_bh
, NULL
, write_chunk
);
1684 /* note, cn->bh might be null now */
1685 unlock_buffer(tmp_bh
);
1696 /* used by flush_commit_list */
1697 static int dirty_one_transaction(struct super_block
*s
,
1698 struct reiserfs_journal_list
*jl
)
1700 struct reiserfs_journal_cnode
*cn
;
1701 struct reiserfs_journal_list
*pjl
;
1704 jl
->j_state
|= LIST_DIRTY
;
1705 cn
= jl
->j_realblock
;
1707 /* look for a more recent transaction that logged this
1708 ** buffer. Only the most recent transaction with a buffer in
1709 ** it is allowed to send that buffer to disk
1711 pjl
= find_newer_jl_for_cn(cn
);
1712 if (!pjl
&& cn
->blocknr
&& cn
->bh
1713 && buffer_journal_dirty(cn
->bh
)) {
1714 BUG_ON(!can_dirty(cn
));
1715 /* if the buffer is prepared, it will either be logged
1716 * or restored. If restored, we need to make sure
1717 * it actually gets marked dirty
1719 clear_buffer_journal_new(cn
->bh
);
1720 if (buffer_journal_prepared(cn
->bh
)) {
1721 set_buffer_journal_restore_dirty(cn
->bh
);
1723 set_buffer_journal_test(cn
->bh
);
1724 mark_buffer_dirty(cn
->bh
);
1732 static int kupdate_transactions(struct super_block
*s
,
1733 struct reiserfs_journal_list
*jl
,
1734 struct reiserfs_journal_list
**next_jl
,
1735 unsigned long *next_trans_id
,
1736 int num_blocks
, int num_trans
)
1740 int transactions_flushed
= 0;
1741 unsigned long orig_trans_id
= jl
->j_trans_id
;
1742 struct buffer_chunk chunk
;
1743 struct list_head
*entry
;
1744 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1747 down(&journal
->j_flush_sem
);
1748 if (!journal_list_still_alive(s
, orig_trans_id
)) {
1752 /* we've got j_flush_sem held, nobody is going to delete any
1753 * of these lists out from underneath us
1755 while ((num_trans
&& transactions_flushed
< num_trans
) ||
1756 (!num_trans
&& written
< num_blocks
)) {
1758 if (jl
->j_len
== 0 || (jl
->j_state
& LIST_TOUCHED
) ||
1759 atomic_read(&jl
->j_commit_left
)
1760 || !(jl
->j_state
& LIST_DIRTY
)) {
1761 del_from_work_list(s
, jl
);
1764 ret
= write_one_transaction(s
, jl
, &chunk
);
1768 transactions_flushed
++;
1770 entry
= jl
->j_list
.next
;
1773 if (entry
== &journal
->j_journal_list
) {
1776 jl
= JOURNAL_LIST_ENTRY(entry
);
1778 /* don't bother with older transactions */
1779 if (jl
->j_trans_id
<= orig_trans_id
)
1783 write_chunk(&chunk
);
1787 up(&journal
->j_flush_sem
);
1791 /* for o_sync and fsync heavy applications, they tend to use
1792 ** all the journa list slots with tiny transactions. These
1793 ** trigger lots and lots of calls to update the header block, which
1794 ** adds seeks and slows things down.
1796 ** This function tries to clear out a large chunk of the journal lists
1797 ** at once, which makes everything faster since only the newest journal
1798 ** list updates the header block
1800 static int flush_used_journal_lists(struct super_block
*s
,
1801 struct reiserfs_journal_list
*jl
)
1803 unsigned long len
= 0;
1804 unsigned long cur_len
;
1808 struct reiserfs_journal_list
*tjl
;
1809 struct reiserfs_journal_list
*flush_jl
;
1810 unsigned long trans_id
;
1811 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1813 flush_jl
= tjl
= jl
;
1815 /* in data logging mode, try harder to flush a lot of blocks */
1816 if (reiserfs_data_log(s
))
1818 /* flush for 256 transactions or limit blocks, whichever comes first */
1819 for (i
= 0; i
< 256 && len
< limit
; i
++) {
1820 if (atomic_read(&tjl
->j_commit_left
) ||
1821 tjl
->j_trans_id
< jl
->j_trans_id
) {
1824 cur_len
= atomic_read(&tjl
->j_nonzerolen
);
1826 tjl
->j_state
&= ~LIST_TOUCHED
;
1830 if (tjl
->j_list
.next
== &journal
->j_journal_list
)
1832 tjl
= JOURNAL_LIST_ENTRY(tjl
->j_list
.next
);
1834 /* try to find a group of blocks we can flush across all the
1835 ** transactions, but only bother if we've actually spanned
1836 ** across multiple lists
1838 if (flush_jl
!= jl
) {
1839 ret
= kupdate_transactions(s
, jl
, &tjl
, &trans_id
, len
, i
);
1841 flush_journal_list(s
, flush_jl
, 1);
1846 ** removes any nodes in table with name block and dev as bh.
1847 ** only touchs the hnext and hprev pointers.
1849 void remove_journal_hash(struct super_block
*sb
,
1850 struct reiserfs_journal_cnode
**table
,
1851 struct reiserfs_journal_list
*jl
,
1852 unsigned long block
, int remove_freed
)
1854 struct reiserfs_journal_cnode
*cur
;
1855 struct reiserfs_journal_cnode
**head
;
1857 head
= &(journal_hash(table
, sb
, block
));
1863 if (cur
->blocknr
== block
&& cur
->sb
== sb
1864 && (jl
== NULL
|| jl
== cur
->jlist
)
1865 && (!test_bit(BLOCK_FREED
, &cur
->state
) || remove_freed
)) {
1867 cur
->hnext
->hprev
= cur
->hprev
;
1870 cur
->hprev
->hnext
= cur
->hnext
;
1877 if (cur
->bh
&& cur
->jlist
) /* anybody who clears the cur->bh will also dec the nonzerolen */
1878 atomic_dec(&(cur
->jlist
->j_nonzerolen
));
1886 static void free_journal_ram(struct super_block
*p_s_sb
)
1888 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1889 kfree(journal
->j_current_jl
);
1890 journal
->j_num_lists
--;
1892 vfree(journal
->j_cnode_free_orig
);
1893 free_list_bitmaps(p_s_sb
, journal
->j_list_bitmap
);
1894 free_bitmap_nodes(p_s_sb
); /* must be after free_list_bitmaps */
1895 if (journal
->j_header_bh
) {
1896 brelse(journal
->j_header_bh
);
1898 /* j_header_bh is on the journal dev, make sure not to release the journal
1899 * dev until we brelse j_header_bh
1901 release_journal_dev(p_s_sb
, journal
);
1906 ** call on unmount. Only set error to 1 if you haven't made your way out
1907 ** of read_super() yet. Any other caller must keep error at 0.
1909 static int do_journal_release(struct reiserfs_transaction_handle
*th
,
1910 struct super_block
*p_s_sb
, int error
)
1912 struct reiserfs_transaction_handle myth
;
1914 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1916 /* we only want to flush out transactions if we were called with error == 0
1918 if (!error
&& !(p_s_sb
->s_flags
& MS_RDONLY
)) {
1919 /* end the current trans */
1920 BUG_ON(!th
->t_trans_id
);
1921 do_journal_end(th
, p_s_sb
, 10, FLUSH_ALL
);
1923 /* make sure something gets logged to force our way into the flush code */
1924 if (!journal_join(&myth
, p_s_sb
, 1)) {
1925 reiserfs_prepare_for_journal(p_s_sb
,
1926 SB_BUFFER_WITH_SB(p_s_sb
),
1928 journal_mark_dirty(&myth
, p_s_sb
,
1929 SB_BUFFER_WITH_SB(p_s_sb
));
1930 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1935 /* this also catches errors during the do_journal_end above */
1936 if (!error
&& reiserfs_is_journal_aborted(journal
)) {
1937 memset(&myth
, 0, sizeof(myth
));
1938 if (!journal_join_abort(&myth
, p_s_sb
, 1)) {
1939 reiserfs_prepare_for_journal(p_s_sb
,
1940 SB_BUFFER_WITH_SB(p_s_sb
),
1942 journal_mark_dirty(&myth
, p_s_sb
,
1943 SB_BUFFER_WITH_SB(p_s_sb
));
1944 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1948 reiserfs_mounted_fs_count
--;
1949 /* wait for all commits to finish */
1950 cancel_delayed_work(&SB_JOURNAL(p_s_sb
)->j_work
);
1951 flush_workqueue(commit_wq
);
1952 if (!reiserfs_mounted_fs_count
) {
1953 destroy_workqueue(commit_wq
);
1957 free_journal_ram(p_s_sb
);
1963 ** call on unmount. flush all journal trans, release all alloc'd ram
1965 int journal_release(struct reiserfs_transaction_handle
*th
,
1966 struct super_block
*p_s_sb
)
1968 return do_journal_release(th
, p_s_sb
, 0);
1972 ** only call from an error condition inside reiserfs_read_super!
1974 int journal_release_error(struct reiserfs_transaction_handle
*th
,
1975 struct super_block
*p_s_sb
)
1977 return do_journal_release(th
, p_s_sb
, 1);
1980 /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */
1981 static int journal_compare_desc_commit(struct super_block
*p_s_sb
,
1982 struct reiserfs_journal_desc
*desc
,
1983 struct reiserfs_journal_commit
*commit
)
1985 if (get_commit_trans_id(commit
) != get_desc_trans_id(desc
) ||
1986 get_commit_trans_len(commit
) != get_desc_trans_len(desc
) ||
1987 get_commit_trans_len(commit
) > SB_JOURNAL(p_s_sb
)->j_trans_max
||
1988 get_commit_trans_len(commit
) <= 0) {
1994 /* returns 0 if it did not find a description block
1995 ** returns -1 if it found a corrupt commit block
1996 ** returns 1 if both desc and commit were valid
1998 static int journal_transaction_is_valid(struct super_block
*p_s_sb
,
1999 struct buffer_head
*d_bh
,
2000 unsigned long *oldest_invalid_trans_id
,
2001 unsigned long *newest_mount_id
)
2003 struct reiserfs_journal_desc
*desc
;
2004 struct reiserfs_journal_commit
*commit
;
2005 struct buffer_head
*c_bh
;
2006 unsigned long offset
;
2011 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2012 if (get_desc_trans_len(desc
) > 0
2013 && !memcmp(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8)) {
2014 if (oldest_invalid_trans_id
&& *oldest_invalid_trans_id
2015 && get_desc_trans_id(desc
) > *oldest_invalid_trans_id
) {
2016 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2017 "journal-986: transaction "
2018 "is valid returning because trans_id %d is greater than "
2019 "oldest_invalid %lu",
2020 get_desc_trans_id(desc
),
2021 *oldest_invalid_trans_id
);
2025 && *newest_mount_id
> get_desc_mount_id(desc
)) {
2026 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2027 "journal-1087: transaction "
2028 "is valid returning because mount_id %d is less than "
2029 "newest_mount_id %lu",
2030 get_desc_mount_id(desc
),
2034 if (get_desc_trans_len(desc
) > SB_JOURNAL(p_s_sb
)->j_trans_max
) {
2035 reiserfs_warning(p_s_sb
,
2036 "journal-2018: Bad transaction length %d encountered, ignoring transaction",
2037 get_desc_trans_len(desc
));
2040 offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2042 /* ok, we have a journal description block, lets see if the transaction was valid */
2044 journal_bread(p_s_sb
,
2045 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2046 ((offset
+ get_desc_trans_len(desc
) +
2047 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2050 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2051 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2052 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2053 "journal_transaction_is_valid, commit offset %ld had bad "
2054 "time %d or length %d",
2056 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2057 get_commit_trans_id(commit
),
2058 get_commit_trans_len(commit
));
2060 if (oldest_invalid_trans_id
) {
2061 *oldest_invalid_trans_id
=
2062 get_desc_trans_id(desc
);
2063 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2065 "transaction_is_valid setting oldest invalid trans_id "
2067 get_desc_trans_id(desc
));
2072 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2073 "journal-1006: found valid "
2074 "transaction start offset %llu, len %d id %d",
2076 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2077 get_desc_trans_len(desc
),
2078 get_desc_trans_id(desc
));
2085 static void brelse_array(struct buffer_head
**heads
, int num
)
2088 for (i
= 0; i
< num
; i
++) {
2094 ** given the start, and values for the oldest acceptable transactions,
2095 ** this either reads in a replays a transaction, or returns because the transaction
2096 ** is invalid, or too old.
2098 static int journal_read_transaction(struct super_block
*p_s_sb
,
2099 unsigned long cur_dblock
,
2100 unsigned long oldest_start
,
2101 unsigned long oldest_trans_id
,
2102 unsigned long newest_mount_id
)
2104 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2105 struct reiserfs_journal_desc
*desc
;
2106 struct reiserfs_journal_commit
*commit
;
2107 unsigned long trans_id
= 0;
2108 struct buffer_head
*c_bh
;
2109 struct buffer_head
*d_bh
;
2110 struct buffer_head
**log_blocks
= NULL
;
2111 struct buffer_head
**real_blocks
= NULL
;
2112 unsigned long trans_offset
;
2116 d_bh
= journal_bread(p_s_sb
, cur_dblock
);
2119 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2120 trans_offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2121 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1037: "
2122 "journal_read_transaction, offset %llu, len %d mount_id %d",
2123 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2124 get_desc_trans_len(desc
), get_desc_mount_id(desc
));
2125 if (get_desc_trans_id(desc
) < oldest_trans_id
) {
2126 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1039: "
2127 "journal_read_trans skipping because %lu is too old",
2129 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2133 if (get_desc_mount_id(desc
) != newest_mount_id
) {
2134 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1146: "
2135 "journal_read_trans skipping because %d is != "
2136 "newest_mount_id %lu", get_desc_mount_id(desc
),
2141 c_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2142 ((trans_offset
+ get_desc_trans_len(desc
) + 1) %
2143 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2148 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2149 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2150 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2151 "journal_read_transaction, "
2152 "commit offset %llu had bad time %d or length %d",
2154 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2155 get_commit_trans_id(commit
),
2156 get_commit_trans_len(commit
));
2161 trans_id
= get_desc_trans_id(desc
);
2162 /* now we know we've got a good transaction, and it was inside the valid time ranges */
2163 log_blocks
= kmalloc(get_desc_trans_len(desc
) *
2164 sizeof(struct buffer_head
*), GFP_NOFS
);
2165 real_blocks
= kmalloc(get_desc_trans_len(desc
) *
2166 sizeof(struct buffer_head
*), GFP_NOFS
);
2167 if (!log_blocks
|| !real_blocks
) {
2172 reiserfs_warning(p_s_sb
,
2173 "journal-1169: kmalloc failed, unable to mount FS");
2176 /* get all the buffer heads */
2177 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
2178 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2180 journal_getblk(p_s_sb
,
2181 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2183 i
) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2184 if (i
< trans_half
) {
2187 le32_to_cpu(desc
->j_realblock
[i
]));
2191 le32_to_cpu(commit
->
2192 j_realblock
[i
- trans_half
]));
2194 if (real_blocks
[i
]->b_blocknr
> SB_BLOCK_COUNT(p_s_sb
)) {
2195 reiserfs_warning(p_s_sb
,
2196 "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
2199 /* make sure we don't try to replay onto log or reserved area */
2200 if (is_block_in_log_or_reserved_area
2201 (p_s_sb
, real_blocks
[i
]->b_blocknr
)) {
2202 reiserfs_warning(p_s_sb
,
2203 "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block");
2205 brelse_array(log_blocks
, i
);
2206 brelse_array(real_blocks
, i
);
2214 /* read in the log blocks, memcpy to the corresponding real block */
2215 ll_rw_block(READ
, get_desc_trans_len(desc
), log_blocks
);
2216 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2217 wait_on_buffer(log_blocks
[i
]);
2218 if (!buffer_uptodate(log_blocks
[i
])) {
2219 reiserfs_warning(p_s_sb
,
2220 "journal-1212: REPLAY FAILURE fsck required! buffer write failed");
2221 brelse_array(log_blocks
+ i
,
2222 get_desc_trans_len(desc
) - i
);
2223 brelse_array(real_blocks
, get_desc_trans_len(desc
));
2230 memcpy(real_blocks
[i
]->b_data
, log_blocks
[i
]->b_data
,
2231 real_blocks
[i
]->b_size
);
2232 set_buffer_uptodate(real_blocks
[i
]);
2233 brelse(log_blocks
[i
]);
2235 /* flush out the real blocks */
2236 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2237 set_buffer_dirty(real_blocks
[i
]);
2238 ll_rw_block(SWRITE
, 1, real_blocks
+ i
);
2240 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2241 wait_on_buffer(real_blocks
[i
]);
2242 if (!buffer_uptodate(real_blocks
[i
])) {
2243 reiserfs_warning(p_s_sb
,
2244 "journal-1226: REPLAY FAILURE, fsck required! buffer write failed");
2245 brelse_array(real_blocks
+ i
,
2246 get_desc_trans_len(desc
) - i
);
2253 brelse(real_blocks
[i
]);
2256 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2257 ((trans_offset
+ get_desc_trans_len(desc
) +
2258 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2259 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2260 "journal-1095: setting journal " "start to offset %ld",
2261 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2263 /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
2264 journal
->j_start
= cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2265 journal
->j_last_flush_trans_id
= trans_id
;
2266 journal
->j_trans_id
= trans_id
+ 1;
2267 /* check for trans_id overflow */
2268 if (journal
->j_trans_id
== 0)
2269 journal
->j_trans_id
= 10;
2277 /* This function reads blocks starting from block and to max_block of bufsize
2278 size (but no more than BUFNR blocks at a time). This proved to improve
2279 mounting speed on self-rebuilding raid5 arrays at least.
2280 Right now it is only used from journal code. But later we might use it
2282 Note: Do not use journal_getblk/sb_getblk functions here! */
2283 static struct buffer_head
*reiserfs_breada(struct block_device
*dev
, int block
,
2284 int bufsize
, unsigned int max_block
)
2286 struct buffer_head
*bhlist
[BUFNR
];
2287 unsigned int blocks
= BUFNR
;
2288 struct buffer_head
*bh
;
2291 bh
= __getblk(dev
, block
, bufsize
);
2292 if (buffer_uptodate(bh
))
2295 if (block
+ BUFNR
> max_block
) {
2296 blocks
= max_block
- block
;
2300 for (i
= 1; i
< blocks
; i
++) {
2301 bh
= __getblk(dev
, block
+ i
, bufsize
);
2302 if (buffer_uptodate(bh
)) {
2308 ll_rw_block(READ
, j
, bhlist
);
2309 for (i
= 1; i
< j
; i
++)
2313 if (buffer_uptodate(bh
))
2320 ** read and replay the log
2321 ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
2322 ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast.
2324 ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
2326 ** On exit, it sets things up so the first transaction will work correctly.
2328 static int journal_read(struct super_block
*p_s_sb
)
2330 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2331 struct reiserfs_journal_desc
*desc
;
2332 unsigned long oldest_trans_id
= 0;
2333 unsigned long oldest_invalid_trans_id
= 0;
2335 unsigned long oldest_start
= 0;
2336 unsigned long cur_dblock
= 0;
2337 unsigned long newest_mount_id
= 9;
2338 struct buffer_head
*d_bh
;
2339 struct reiserfs_journal_header
*jh
;
2340 int valid_journal_header
= 0;
2341 int replay_count
= 0;
2342 int continue_replay
= 1;
2344 char b
[BDEVNAME_SIZE
];
2346 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2347 reiserfs_info(p_s_sb
, "checking transaction log (%s)\n",
2348 bdevname(journal
->j_dev_bd
, b
));
2349 start
= get_seconds();
2351 /* step 1, read in the journal header block. Check the transaction it says
2352 ** is the first unflushed, and if that transaction is not valid,
2355 journal
->j_header_bh
= journal_bread(p_s_sb
,
2356 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
)
2357 + SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2358 if (!journal
->j_header_bh
) {
2361 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
);
2362 if (le32_to_cpu(jh
->j_first_unflushed_offset
) <
2363 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)
2364 && le32_to_cpu(jh
->j_last_flush_trans_id
) > 0) {
2366 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2367 le32_to_cpu(jh
->j_first_unflushed_offset
);
2368 oldest_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2369 newest_mount_id
= le32_to_cpu(jh
->j_mount_id
);
2370 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2371 "journal-1153: found in "
2372 "header: first_unflushed_offset %d, last_flushed_trans_id "
2373 "%lu", le32_to_cpu(jh
->j_first_unflushed_offset
),
2374 le32_to_cpu(jh
->j_last_flush_trans_id
));
2375 valid_journal_header
= 1;
2377 /* now, we try to read the first unflushed offset. If it is not valid,
2378 ** there is nothing more we can do, and it makes no sense to read
2379 ** through the whole log.
2382 journal_bread(p_s_sb
,
2383 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2384 le32_to_cpu(jh
->j_first_unflushed_offset
));
2385 ret
= journal_transaction_is_valid(p_s_sb
, d_bh
, NULL
, NULL
);
2387 continue_replay
= 0;
2390 goto start_log_replay
;
2393 if (continue_replay
&& bdev_read_only(p_s_sb
->s_bdev
)) {
2394 reiserfs_warning(p_s_sb
,
2395 "clm-2076: device is readonly, unable to replay log");
2399 /* ok, there are transactions that need to be replayed. start with the first log block, find
2400 ** all the valid transactions, and pick out the oldest.
2402 while (continue_replay
2404 (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2405 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) {
2406 /* Note that it is required for blocksize of primary fs device and journal
2407 device to be the same */
2409 reiserfs_breada(journal
->j_dev_bd
, cur_dblock
,
2410 p_s_sb
->s_blocksize
,
2411 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2412 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2414 journal_transaction_is_valid(p_s_sb
, d_bh
,
2415 &oldest_invalid_trans_id
,
2418 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2419 if (oldest_start
== 0) { /* init all oldest_ values */
2420 oldest_trans_id
= get_desc_trans_id(desc
);
2421 oldest_start
= d_bh
->b_blocknr
;
2422 newest_mount_id
= get_desc_mount_id(desc
);
2423 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2424 "journal-1179: Setting "
2425 "oldest_start to offset %llu, trans_id %lu",
2427 SB_ONDISK_JOURNAL_1st_BLOCK
2428 (p_s_sb
), oldest_trans_id
);
2429 } else if (oldest_trans_id
> get_desc_trans_id(desc
)) {
2430 /* one we just read was older */
2431 oldest_trans_id
= get_desc_trans_id(desc
);
2432 oldest_start
= d_bh
->b_blocknr
;
2433 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2434 "journal-1180: Resetting "
2435 "oldest_start to offset %lu, trans_id %lu",
2437 SB_ONDISK_JOURNAL_1st_BLOCK
2438 (p_s_sb
), oldest_trans_id
);
2440 if (newest_mount_id
< get_desc_mount_id(desc
)) {
2441 newest_mount_id
= get_desc_mount_id(desc
);
2442 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2443 "journal-1299: Setting "
2444 "newest_mount_id to %d",
2445 get_desc_mount_id(desc
));
2447 cur_dblock
+= get_desc_trans_len(desc
) + 2;
2455 cur_dblock
= oldest_start
;
2456 if (oldest_trans_id
) {
2457 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2458 "journal-1206: Starting replay "
2459 "from offset %llu, trans_id %lu",
2460 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2465 while (continue_replay
&& oldest_trans_id
> 0) {
2467 journal_read_transaction(p_s_sb
, cur_dblock
, oldest_start
,
2468 oldest_trans_id
, newest_mount_id
);
2471 } else if (ret
!= 0) {
2475 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + journal
->j_start
;
2477 if (cur_dblock
== oldest_start
)
2481 if (oldest_trans_id
== 0) {
2482 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2483 "journal-1225: No valid " "transactions found");
2485 /* j_start does not get set correctly if we don't replay any transactions.
2486 ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
2487 ** copy the trans_id from the header
2489 if (valid_journal_header
&& replay_count
== 0) {
2490 journal
->j_start
= le32_to_cpu(jh
->j_first_unflushed_offset
);
2491 journal
->j_trans_id
=
2492 le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2493 /* check for trans_id overflow */
2494 if (journal
->j_trans_id
== 0)
2495 journal
->j_trans_id
= 10;
2496 journal
->j_last_flush_trans_id
=
2497 le32_to_cpu(jh
->j_last_flush_trans_id
);
2498 journal
->j_mount_id
= le32_to_cpu(jh
->j_mount_id
) + 1;
2500 journal
->j_mount_id
= newest_mount_id
+ 1;
2502 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2503 "newest_mount_id to %lu", journal
->j_mount_id
);
2504 journal
->j_first_unflushed_offset
= journal
->j_start
;
2505 if (replay_count
> 0) {
2506 reiserfs_info(p_s_sb
,
2507 "replayed %d transactions in %lu seconds\n",
2508 replay_count
, get_seconds() - start
);
2510 if (!bdev_read_only(p_s_sb
->s_bdev
) &&
2511 _update_journal_header_block(p_s_sb
, journal
->j_start
,
2512 journal
->j_last_flush_trans_id
)) {
2513 /* replay failed, caller must call free_journal_ram and abort
2521 static struct reiserfs_journal_list
*alloc_journal_list(struct super_block
*s
)
2523 struct reiserfs_journal_list
*jl
;
2524 jl
= kzalloc(sizeof(struct reiserfs_journal_list
),
2525 GFP_NOFS
| __GFP_NOFAIL
);
2526 INIT_LIST_HEAD(&jl
->j_list
);
2527 INIT_LIST_HEAD(&jl
->j_working_list
);
2528 INIT_LIST_HEAD(&jl
->j_tail_bh_list
);
2529 INIT_LIST_HEAD(&jl
->j_bh_list
);
2530 sema_init(&jl
->j_commit_lock
, 1);
2531 SB_JOURNAL(s
)->j_num_lists
++;
2532 get_journal_list(jl
);
2536 static void journal_list_init(struct super_block
*p_s_sb
)
2538 SB_JOURNAL(p_s_sb
)->j_current_jl
= alloc_journal_list(p_s_sb
);
2541 static int release_journal_dev(struct super_block
*super
,
2542 struct reiserfs_journal
*journal
)
2548 if (journal
->j_dev_file
!= NULL
) {
2549 result
= filp_close(journal
->j_dev_file
, NULL
);
2550 journal
->j_dev_file
= NULL
;
2551 journal
->j_dev_bd
= NULL
;
2552 } else if (journal
->j_dev_bd
!= NULL
) {
2553 result
= blkdev_put(journal
->j_dev_bd
);
2554 journal
->j_dev_bd
= NULL
;
2558 reiserfs_warning(super
,
2559 "sh-457: release_journal_dev: Cannot release journal device: %i",
2565 static int journal_init_dev(struct super_block
*super
,
2566 struct reiserfs_journal
*journal
,
2567 const char *jdev_name
)
2571 int blkdev_mode
= FMODE_READ
| FMODE_WRITE
;
2572 char b
[BDEVNAME_SIZE
];
2576 journal
->j_dev_bd
= NULL
;
2577 journal
->j_dev_file
= NULL
;
2578 jdev
= SB_ONDISK_JOURNAL_DEVICE(super
) ?
2579 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super
)) : super
->s_dev
;
2581 if (bdev_read_only(super
->s_bdev
))
2582 blkdev_mode
= FMODE_READ
;
2584 /* there is no "jdev" option and journal is on separate device */
2585 if ((!jdev_name
|| !jdev_name
[0])) {
2586 journal
->j_dev_bd
= open_by_devnum(jdev
, blkdev_mode
);
2587 if (IS_ERR(journal
->j_dev_bd
)) {
2588 result
= PTR_ERR(journal
->j_dev_bd
);
2589 journal
->j_dev_bd
= NULL
;
2590 reiserfs_warning(super
, "sh-458: journal_init_dev: "
2591 "cannot init journal device '%s': %i",
2592 __bdevname(jdev
, b
), result
);
2594 } else if (jdev
!= super
->s_dev
)
2595 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2599 journal
->j_dev_file
= filp_open(jdev_name
, 0, 0);
2600 if (!IS_ERR(journal
->j_dev_file
)) {
2601 struct inode
*jdev_inode
= journal
->j_dev_file
->f_mapping
->host
;
2602 if (!S_ISBLK(jdev_inode
->i_mode
)) {
2603 reiserfs_warning(super
, "journal_init_dev: '%s' is "
2604 "not a block device", jdev_name
);
2606 release_journal_dev(super
, journal
);
2609 journal
->j_dev_bd
= I_BDEV(jdev_inode
);
2610 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2611 reiserfs_info(super
,
2612 "journal_init_dev: journal device: %s\n",
2613 bdevname(journal
->j_dev_bd
, b
));
2616 result
= PTR_ERR(journal
->j_dev_file
);
2617 journal
->j_dev_file
= NULL
;
2618 reiserfs_warning(super
,
2619 "journal_init_dev: Cannot open '%s': %i",
2626 ** must be called once on fs mount. calls journal_read for you
2628 int journal_init(struct super_block
*p_s_sb
, const char *j_dev_name
,
2629 int old_format
, unsigned int commit_max_age
)
2631 int num_cnodes
= SB_ONDISK_JOURNAL_SIZE(p_s_sb
) * 2;
2632 struct buffer_head
*bhjh
;
2633 struct reiserfs_super_block
*rs
;
2634 struct reiserfs_journal_header
*jh
;
2635 struct reiserfs_journal
*journal
;
2636 struct reiserfs_journal_list
*jl
;
2637 char b
[BDEVNAME_SIZE
];
2639 journal
= SB_JOURNAL(p_s_sb
) = vmalloc(sizeof(struct reiserfs_journal
));
2641 reiserfs_warning(p_s_sb
,
2642 "journal-1256: unable to get memory for journal structure");
2645 memset(journal
, 0, sizeof(struct reiserfs_journal
));
2646 INIT_LIST_HEAD(&journal
->j_bitmap_nodes
);
2647 INIT_LIST_HEAD(&journal
->j_prealloc_list
);
2648 INIT_LIST_HEAD(&journal
->j_working_list
);
2649 INIT_LIST_HEAD(&journal
->j_journal_list
);
2650 journal
->j_persistent_trans
= 0;
2651 if (reiserfs_allocate_list_bitmaps(p_s_sb
,
2652 journal
->j_list_bitmap
,
2653 SB_BMAP_NR(p_s_sb
)))
2654 goto free_and_return
;
2655 allocate_bitmap_nodes(p_s_sb
);
2657 /* reserved for journal area support */
2658 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) = (old_format
?
2659 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2660 / p_s_sb
->s_blocksize
+
2661 SB_BMAP_NR(p_s_sb
) +
2663 REISERFS_DISK_OFFSET_IN_BYTES
/
2664 p_s_sb
->s_blocksize
+ 2);
2666 /* Sanity check to see is the standard journal fitting withing first bitmap
2667 (actual for small blocksizes) */
2668 if (!SB_ONDISK_JOURNAL_DEVICE(p_s_sb
) &&
2669 (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) +
2670 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) > p_s_sb
->s_blocksize
* 8)) {
2671 reiserfs_warning(p_s_sb
,
2672 "journal-1393: journal does not fit for area "
2673 "addressed by first of bitmap blocks. It starts at "
2674 "%u and its size is %u. Block size %ld",
2675 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
),
2676 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2677 p_s_sb
->s_blocksize
);
2678 goto free_and_return
;
2681 if (journal_init_dev(p_s_sb
, journal
, j_dev_name
) != 0) {
2682 reiserfs_warning(p_s_sb
,
2683 "sh-462: unable to initialize jornal device");
2684 goto free_and_return
;
2687 rs
= SB_DISK_SUPER_BLOCK(p_s_sb
);
2689 /* read journal header */
2690 bhjh
= journal_bread(p_s_sb
,
2691 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2692 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2694 reiserfs_warning(p_s_sb
,
2695 "sh-459: unable to read journal header");
2696 goto free_and_return
;
2698 jh
= (struct reiserfs_journal_header
*)(bhjh
->b_data
);
2700 /* make sure that journal matches to the super block */
2701 if (is_reiserfs_jr(rs
)
2702 && (le32_to_cpu(jh
->jh_journal
.jp_journal_magic
) !=
2703 sb_jp_journal_magic(rs
))) {
2704 reiserfs_warning(p_s_sb
,
2705 "sh-460: journal header magic %x "
2706 "(device %s) does not match to magic found in super "
2707 "block %x", jh
->jh_journal
.jp_journal_magic
,
2708 bdevname(journal
->j_dev_bd
, b
),
2709 sb_jp_journal_magic(rs
));
2711 goto free_and_return
;
2714 journal
->j_trans_max
= le32_to_cpu(jh
->jh_journal
.jp_journal_trans_max
);
2715 journal
->j_max_batch
= le32_to_cpu(jh
->jh_journal
.jp_journal_max_batch
);
2716 journal
->j_max_commit_age
=
2717 le32_to_cpu(jh
->jh_journal
.jp_journal_max_commit_age
);
2718 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
2720 if (journal
->j_trans_max
) {
2721 /* make sure these parameters are available, assign it if they are not */
2722 __u32 initial
= journal
->j_trans_max
;
2725 if (p_s_sb
->s_blocksize
< 4096)
2726 ratio
= 4096 / p_s_sb
->s_blocksize
;
2728 if (SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / journal
->j_trans_max
<
2730 journal
->j_trans_max
=
2731 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / JOURNAL_MIN_RATIO
;
2732 if (journal
->j_trans_max
> JOURNAL_TRANS_MAX_DEFAULT
/ ratio
)
2733 journal
->j_trans_max
=
2734 JOURNAL_TRANS_MAX_DEFAULT
/ ratio
;
2735 if (journal
->j_trans_max
< JOURNAL_TRANS_MIN_DEFAULT
/ ratio
)
2736 journal
->j_trans_max
=
2737 JOURNAL_TRANS_MIN_DEFAULT
/ ratio
;
2739 if (journal
->j_trans_max
!= initial
)
2740 reiserfs_warning(p_s_sb
,
2741 "sh-461: journal_init: wrong transaction max size (%u). Changed to %u",
2742 initial
, journal
->j_trans_max
);
2744 journal
->j_max_batch
= journal
->j_trans_max
*
2745 JOURNAL_MAX_BATCH_DEFAULT
/ JOURNAL_TRANS_MAX_DEFAULT
;
2748 if (!journal
->j_trans_max
) {
2749 /*we have the file system was created by old version of mkreiserfs
2750 so this field contains zero value */
2751 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
;
2752 journal
->j_max_batch
= JOURNAL_MAX_BATCH_DEFAULT
;
2753 journal
->j_max_commit_age
= JOURNAL_MAX_COMMIT_AGE
;
2755 /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096
2756 trans max size is decreased proportionally */
2757 if (p_s_sb
->s_blocksize
< 4096) {
2758 journal
->j_trans_max
/= (4096 / p_s_sb
->s_blocksize
);
2759 journal
->j_max_batch
= (journal
->j_trans_max
) * 9 / 10;
2763 journal
->j_default_max_commit_age
= journal
->j_max_commit_age
;
2765 if (commit_max_age
!= 0) {
2766 journal
->j_max_commit_age
= commit_max_age
;
2767 journal
->j_max_trans_age
= commit_max_age
;
2770 reiserfs_info(p_s_sb
, "journal params: device %s, size %u, "
2771 "journal first block %u, max trans len %u, max batch %u, "
2772 "max commit age %u, max trans age %u\n",
2773 bdevname(journal
->j_dev_bd
, b
),
2774 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2775 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2776 journal
->j_trans_max
,
2777 journal
->j_max_batch
,
2778 journal
->j_max_commit_age
, journal
->j_max_trans_age
);
2782 journal
->j_list_bitmap_index
= 0;
2783 journal_list_init(p_s_sb
);
2785 memset(journal
->j_list_hash_table
, 0,
2786 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
2788 INIT_LIST_HEAD(&journal
->j_dirty_buffers
);
2789 spin_lock_init(&journal
->j_dirty_buffers_lock
);
2791 journal
->j_start
= 0;
2793 journal
->j_len_alloc
= 0;
2794 atomic_set(&(journal
->j_wcount
), 0);
2795 atomic_set(&(journal
->j_async_throttle
), 0);
2796 journal
->j_bcount
= 0;
2797 journal
->j_trans_start_time
= 0;
2798 journal
->j_last
= NULL
;
2799 journal
->j_first
= NULL
;
2800 init_waitqueue_head(&(journal
->j_join_wait
));
2801 sema_init(&journal
->j_lock
, 1);
2802 sema_init(&journal
->j_flush_sem
, 1);
2804 journal
->j_trans_id
= 10;
2805 journal
->j_mount_id
= 10;
2806 journal
->j_state
= 0;
2807 atomic_set(&(journal
->j_jlock
), 0);
2808 journal
->j_cnode_free_list
= allocate_cnodes(num_cnodes
);
2809 journal
->j_cnode_free_orig
= journal
->j_cnode_free_list
;
2810 journal
->j_cnode_free
= journal
->j_cnode_free_list
? num_cnodes
: 0;
2811 journal
->j_cnode_used
= 0;
2812 journal
->j_must_wait
= 0;
2814 if (journal
->j_cnode_free
== 0) {
2815 reiserfs_warning(p_s_sb
, "journal-2004: Journal cnode memory "
2816 "allocation failed (%ld bytes). Journal is "
2817 "too large for available memory. Usually "
2818 "this is due to a journal that is too large.",
2819 sizeof (struct reiserfs_journal_cnode
) * num_cnodes
);
2820 goto free_and_return
;
2823 init_journal_hash(p_s_sb
);
2824 jl
= journal
->j_current_jl
;
2825 jl
->j_list_bitmap
= get_list_bitmap(p_s_sb
, jl
);
2826 if (!jl
->j_list_bitmap
) {
2827 reiserfs_warning(p_s_sb
,
2828 "journal-2005, get_list_bitmap failed for journal list 0");
2829 goto free_and_return
;
2831 if (journal_read(p_s_sb
) < 0) {
2832 reiserfs_warning(p_s_sb
, "Replay Failure, unable to mount");
2833 goto free_and_return
;
2836 reiserfs_mounted_fs_count
++;
2837 if (reiserfs_mounted_fs_count
<= 1)
2838 commit_wq
= create_workqueue("reiserfs");
2840 INIT_WORK(&journal
->j_work
, flush_async_commits
, p_s_sb
);
2843 free_journal_ram(p_s_sb
);
2848 ** test for a polite end of the current transaction. Used by file_write, and should
2849 ** be used by delete to make sure they don't write more than can fit inside a single
2852 int journal_transaction_should_end(struct reiserfs_transaction_handle
*th
,
2855 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2856 time_t now
= get_seconds();
2857 /* cannot restart while nested */
2858 BUG_ON(!th
->t_trans_id
);
2859 if (th
->t_refcount
> 1)
2861 if (journal
->j_must_wait
> 0 ||
2862 (journal
->j_len_alloc
+ new_alloc
) >= journal
->j_max_batch
||
2863 atomic_read(&(journal
->j_jlock
)) ||
2864 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
||
2865 journal
->j_cnode_free
< (journal
->j_trans_max
* 3)) {
2868 /* protected by the BKL here */
2869 journal
->j_len_alloc
+= new_alloc
;
2870 th
->t_blocks_allocated
+= new_alloc
;
2874 /* this must be called inside a transaction, and requires the
2875 ** kernel_lock to be held
2877 void reiserfs_block_writes(struct reiserfs_transaction_handle
*th
)
2879 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2880 BUG_ON(!th
->t_trans_id
);
2881 journal
->j_must_wait
= 1;
2882 set_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2886 /* this must be called without a transaction started, and does not
2889 void reiserfs_allow_writes(struct super_block
*s
)
2891 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2892 clear_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2893 wake_up(&journal
->j_join_wait
);
2896 /* this must be called without a transaction started, and does not
2899 void reiserfs_wait_on_write_block(struct super_block
*s
)
2901 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2902 wait_event(journal
->j_join_wait
,
2903 !test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
));
2906 static void queue_log_writer(struct super_block
*s
)
2909 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2910 set_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
2913 * we don't want to use wait_event here because
2914 * we only want to wait once.
2916 init_waitqueue_entry(&wait
, current
);
2917 add_wait_queue(&journal
->j_join_wait
, &wait
);
2918 set_current_state(TASK_UNINTERRUPTIBLE
);
2919 if (test_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2921 current
->state
= TASK_RUNNING
;
2922 remove_wait_queue(&journal
->j_join_wait
, &wait
);
2925 static void wake_queued_writers(struct super_block
*s
)
2927 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2928 if (test_and_clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2929 wake_up(&journal
->j_join_wait
);
2932 static void let_transaction_grow(struct super_block
*sb
, unsigned long trans_id
)
2934 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2935 unsigned long bcount
= journal
->j_bcount
;
2937 schedule_timeout_uninterruptible(1);
2938 journal
->j_current_jl
->j_state
|= LIST_COMMIT_PENDING
;
2939 while ((atomic_read(&journal
->j_wcount
) > 0 ||
2940 atomic_read(&journal
->j_jlock
)) &&
2941 journal
->j_trans_id
== trans_id
) {
2942 queue_log_writer(sb
);
2944 if (journal
->j_trans_id
!= trans_id
)
2946 if (bcount
== journal
->j_bcount
)
2948 bcount
= journal
->j_bcount
;
2952 /* join == true if you must join an existing transaction.
2953 ** join == false if you can deal with waiting for others to finish
2955 ** this will block until the transaction is joinable. send the number of blocks you
2956 ** expect to use in nblocks.
2958 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
2959 struct super_block
*p_s_sb
, unsigned long nblocks
,
2962 time_t now
= get_seconds();
2964 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2965 struct reiserfs_transaction_handle myth
;
2966 int sched_count
= 0;
2969 reiserfs_check_lock_depth(p_s_sb
, "journal_begin");
2970 if (nblocks
> journal
->j_trans_max
)
2973 PROC_INFO_INC(p_s_sb
, journal
.journal_being
);
2974 /* set here for journal_join */
2976 th
->t_super
= p_s_sb
;
2979 lock_journal(p_s_sb
);
2980 if (join
!= JBEGIN_ABORT
&& reiserfs_is_journal_aborted(journal
)) {
2981 unlock_journal(p_s_sb
);
2982 retval
= journal
->j_errno
;
2985 journal
->j_bcount
++;
2987 if (test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) {
2988 unlock_journal(p_s_sb
);
2989 reiserfs_wait_on_write_block(p_s_sb
);
2990 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_writers
);
2993 now
= get_seconds();
2995 /* if there is no room in the journal OR
2996 ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning
2997 ** we don't sleep if there aren't other writers
3000 if ((!join
&& journal
->j_must_wait
> 0) ||
3002 && (journal
->j_len_alloc
+ nblocks
+ 2) >= journal
->j_max_batch
)
3003 || (!join
&& atomic_read(&journal
->j_wcount
) > 0
3004 && journal
->j_trans_start_time
> 0
3005 && (now
- journal
->j_trans_start_time
) >
3006 journal
->j_max_trans_age
) || (!join
3007 && atomic_read(&journal
->j_jlock
))
3008 || (!join
&& journal
->j_cnode_free
< (journal
->j_trans_max
* 3))) {
3010 old_trans_id
= journal
->j_trans_id
;
3011 unlock_journal(p_s_sb
); /* allow others to finish this transaction */
3013 if (!join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >=
3014 journal
->j_max_batch
&&
3015 ((journal
->j_len
+ nblocks
+ 2) * 100) <
3016 (journal
->j_len_alloc
* 75)) {
3017 if (atomic_read(&journal
->j_wcount
) > 10) {
3019 queue_log_writer(p_s_sb
);
3023 /* don't mess with joining the transaction if all we have to do is
3024 * wait for someone else to do a commit
3026 if (atomic_read(&journal
->j_jlock
)) {
3027 while (journal
->j_trans_id
== old_trans_id
&&
3028 atomic_read(&journal
->j_jlock
)) {
3029 queue_log_writer(p_s_sb
);
3033 retval
= journal_join(&myth
, p_s_sb
, 1);
3037 /* someone might have ended the transaction while we joined */
3038 if (old_trans_id
!= journal
->j_trans_id
) {
3039 retval
= do_journal_end(&myth
, p_s_sb
, 1, 0);
3041 retval
= do_journal_end(&myth
, p_s_sb
, 1, COMMIT_NOW
);
3047 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_wcount
);
3050 /* we are the first writer, set trans_id */
3051 if (journal
->j_trans_start_time
== 0) {
3052 journal
->j_trans_start_time
= get_seconds();
3054 atomic_inc(&(journal
->j_wcount
));
3055 journal
->j_len_alloc
+= nblocks
;
3056 th
->t_blocks_logged
= 0;
3057 th
->t_blocks_allocated
= nblocks
;
3058 th
->t_trans_id
= journal
->j_trans_id
;
3059 unlock_journal(p_s_sb
);
3060 INIT_LIST_HEAD(&th
->t_list
);
3065 memset(th
, 0, sizeof(*th
));
3066 /* Re-set th->t_super, so we can properly keep track of how many
3067 * persistent transactions there are. We need to do this so if this
3068 * call is part of a failed restart_transaction, we can free it later */
3069 th
->t_super
= p_s_sb
;
3073 struct reiserfs_transaction_handle
*reiserfs_persistent_transaction(struct
3079 struct reiserfs_transaction_handle
*th
;
3081 /* if we're nesting into an existing transaction. It will be
3082 ** persistent on its own
3084 if (reiserfs_transaction_running(s
)) {
3085 th
= current
->journal_info
;
3087 if (th
->t_refcount
< 2) {
3092 th
= kmalloc(sizeof(struct reiserfs_transaction_handle
), GFP_NOFS
);
3095 ret
= journal_begin(th
, s
, nblocks
);
3101 SB_JOURNAL(s
)->j_persistent_trans
++;
3105 int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle
*th
)
3107 struct super_block
*s
= th
->t_super
;
3110 ret
= journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
3113 if (th
->t_refcount
== 0) {
3114 SB_JOURNAL(s
)->j_persistent_trans
--;
3120 static int journal_join(struct reiserfs_transaction_handle
*th
,
3121 struct super_block
*p_s_sb
, unsigned long nblocks
)
3123 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3125 /* this keeps do_journal_end from NULLing out the current->journal_info
3128 th
->t_handle_save
= cur_th
;
3129 if (cur_th
&& cur_th
->t_refcount
> 1) {
3132 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_JOIN
);
3135 int journal_join_abort(struct reiserfs_transaction_handle
*th
,
3136 struct super_block
*p_s_sb
, unsigned long nblocks
)
3138 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3140 /* this keeps do_journal_end from NULLing out the current->journal_info
3143 th
->t_handle_save
= cur_th
;
3144 if (cur_th
&& cur_th
->t_refcount
> 1) {
3147 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_ABORT
);
3150 int journal_begin(struct reiserfs_transaction_handle
*th
,
3151 struct super_block
*p_s_sb
, unsigned long nblocks
)
3153 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3156 th
->t_handle_save
= NULL
;
3158 /* we are nesting into the current transaction */
3159 if (cur_th
->t_super
== p_s_sb
) {
3160 BUG_ON(!cur_th
->t_refcount
);
3161 cur_th
->t_refcount
++;
3162 memcpy(th
, cur_th
, sizeof(*th
));
3163 if (th
->t_refcount
<= 1)
3164 reiserfs_warning(p_s_sb
,
3165 "BAD: refcount <= 1, but journal_info != 0");
3168 /* we've ended up with a handle from a different filesystem.
3169 ** save it and restore on journal_end. This should never
3172 reiserfs_warning(p_s_sb
,
3173 "clm-2100: nesting info a different FS");
3174 th
->t_handle_save
= current
->journal_info
;
3175 current
->journal_info
= th
;
3178 current
->journal_info
= th
;
3180 ret
= do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_REG
);
3181 if (current
->journal_info
!= th
)
3184 /* I guess this boils down to being the reciprocal of clm-2100 above.
3185 * If do_journal_begin_r fails, we need to put it back, since journal_end
3186 * won't be called to do it. */
3188 current
->journal_info
= th
->t_handle_save
;
3190 BUG_ON(!th
->t_refcount
);
3196 ** puts bh into the current transaction. If it was already there, reorders removes the
3197 ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
3199 ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the
3200 ** transaction is committed.
3202 ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
3204 int journal_mark_dirty(struct reiserfs_transaction_handle
*th
,
3205 struct super_block
*p_s_sb
, struct buffer_head
*bh
)
3207 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3208 struct reiserfs_journal_cnode
*cn
= NULL
;
3209 int count_already_incd
= 0;
3211 BUG_ON(!th
->t_trans_id
);
3213 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty
);
3214 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3215 reiserfs_panic(th
->t_super
,
3216 "journal-1577: handle trans id %ld != current trans id %ld\n",
3217 th
->t_trans_id
, journal
->j_trans_id
);
3222 prepared
= test_clear_buffer_journal_prepared(bh
);
3223 clear_buffer_journal_restore_dirty(bh
);
3224 /* already in this transaction, we are done */
3225 if (buffer_journaled(bh
)) {
3226 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_already
);
3230 /* this must be turned into a panic instead of a warning. We can't allow
3231 ** a dirty or journal_dirty or locked buffer to be logged, as some changes
3232 ** could get to disk too early. NOT GOOD.
3234 if (!prepared
|| buffer_dirty(bh
)) {
3235 reiserfs_warning(p_s_sb
, "journal-1777: buffer %llu bad state "
3236 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3237 (unsigned long long)bh
->b_blocknr
,
3238 prepared
? ' ' : '!',
3239 buffer_locked(bh
) ? ' ' : '!',
3240 buffer_dirty(bh
) ? ' ' : '!',
3241 buffer_journal_dirty(bh
) ? ' ' : '!');
3244 if (atomic_read(&(journal
->j_wcount
)) <= 0) {
3245 reiserfs_warning(p_s_sb
,
3246 "journal-1409: journal_mark_dirty returning because j_wcount was %d",
3247 atomic_read(&(journal
->j_wcount
)));
3250 /* this error means I've screwed up, and we've overflowed the transaction.
3251 ** Nothing can be done here, except make the FS readonly or panic.
3253 if (journal
->j_len
>= journal
->j_trans_max
) {
3254 reiserfs_panic(th
->t_super
,
3255 "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n",
3259 if (buffer_journal_dirty(bh
)) {
3260 count_already_incd
= 1;
3261 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_notjournal
);
3262 clear_buffer_journal_dirty(bh
);
3265 if (journal
->j_len
> journal
->j_len_alloc
) {
3266 journal
->j_len_alloc
= journal
->j_len
+ JOURNAL_PER_BALANCE_CNT
;
3269 set_buffer_journaled(bh
);
3271 /* now put this guy on the end */
3273 cn
= get_cnode(p_s_sb
);
3275 reiserfs_panic(p_s_sb
, "get_cnode failed!\n");
3278 if (th
->t_blocks_logged
== th
->t_blocks_allocated
) {
3279 th
->t_blocks_allocated
+= JOURNAL_PER_BALANCE_CNT
;
3280 journal
->j_len_alloc
+= JOURNAL_PER_BALANCE_CNT
;
3282 th
->t_blocks_logged
++;
3286 cn
->blocknr
= bh
->b_blocknr
;
3289 insert_journal_hash(journal
->j_hash_table
, cn
);
3290 if (!count_already_incd
) {
3295 cn
->prev
= journal
->j_last
;
3297 if (journal
->j_last
) {
3298 journal
->j_last
->next
= cn
;
3299 journal
->j_last
= cn
;
3301 journal
->j_first
= cn
;
3302 journal
->j_last
= cn
;
3307 int journal_end(struct reiserfs_transaction_handle
*th
,
3308 struct super_block
*p_s_sb
, unsigned long nblocks
)
3310 if (!current
->journal_info
&& th
->t_refcount
> 1)
3311 reiserfs_warning(p_s_sb
, "REISER-NESTING: th NULL, refcount %d",
3314 if (!th
->t_trans_id
) {
3320 if (th
->t_refcount
> 0) {
3321 struct reiserfs_transaction_handle
*cur_th
=
3322 current
->journal_info
;
3324 /* we aren't allowed to close a nested transaction on a different
3325 ** filesystem from the one in the task struct
3327 if (cur_th
->t_super
!= th
->t_super
)
3331 memcpy(current
->journal_info
, th
, sizeof(*th
));
3336 return do_journal_end(th
, p_s_sb
, nblocks
, 0);
3340 /* removes from the current transaction, relsing and descrementing any counters.
3341 ** also files the removed buffer directly onto the clean list
3343 ** called by journal_mark_freed when a block has been deleted
3345 ** returns 1 if it cleaned and relsed the buffer. 0 otherwise
3347 static int remove_from_transaction(struct super_block
*p_s_sb
,
3348 b_blocknr_t blocknr
, int already_cleaned
)
3350 struct buffer_head
*bh
;
3351 struct reiserfs_journal_cnode
*cn
;
3352 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3355 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3356 if (!cn
|| !cn
->bh
) {
3361 cn
->prev
->next
= cn
->next
;
3364 cn
->next
->prev
= cn
->prev
;
3366 if (cn
== journal
->j_first
) {
3367 journal
->j_first
= cn
->next
;
3369 if (cn
== journal
->j_last
) {
3370 journal
->j_last
= cn
->prev
;
3373 remove_journal_hash(p_s_sb
, journal
->j_hash_table
, NULL
,
3375 clear_buffer_journaled(bh
); /* don't log this one */
3377 if (!already_cleaned
) {
3378 clear_buffer_journal_dirty(bh
);
3379 clear_buffer_dirty(bh
);
3380 clear_buffer_journal_test(bh
);
3382 if (atomic_read(&(bh
->b_count
)) < 0) {
3383 reiserfs_warning(p_s_sb
,
3384 "journal-1752: remove from trans, b_count < 0");
3389 journal
->j_len_alloc
--;
3390 free_cnode(p_s_sb
, cn
);
3395 ** for any cnode in a journal list, it can only be dirtied of all the
3396 ** transactions that include it are commited to disk.
3397 ** this checks through each transaction, and returns 1 if you are allowed to dirty,
3398 ** and 0 if you aren't
3400 ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
3401 ** blocks for a given transaction on disk
3404 static int can_dirty(struct reiserfs_journal_cnode
*cn
)
3406 struct super_block
*sb
= cn
->sb
;
3407 b_blocknr_t blocknr
= cn
->blocknr
;
3408 struct reiserfs_journal_cnode
*cur
= cn
->hprev
;
3411 /* first test hprev. These are all newer than cn, so any node here
3412 ** with the same block number and dev means this node can't be sent
3413 ** to disk right now.
3415 while (cur
&& can_dirty
) {
3416 if (cur
->jlist
&& cur
->bh
&& cur
->blocknr
&& cur
->sb
== sb
&&
3417 cur
->blocknr
== blocknr
) {
3422 /* then test hnext. These are all older than cn. As long as they
3423 ** are committed to the log, it is safe to write cn to disk
3426 while (cur
&& can_dirty
) {
3427 if (cur
->jlist
&& cur
->jlist
->j_len
> 0 &&
3428 atomic_read(&(cur
->jlist
->j_commit_left
)) > 0 && cur
->bh
&&
3429 cur
->blocknr
&& cur
->sb
== sb
&& cur
->blocknr
== blocknr
) {
3437 /* syncs the commit blocks, but does not force the real buffers to disk
3438 ** will wait until the current transaction is done/commited before returning
3440 int journal_end_sync(struct reiserfs_transaction_handle
*th
,
3441 struct super_block
*p_s_sb
, unsigned long nblocks
)
3443 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3445 BUG_ON(!th
->t_trans_id
);
3446 /* you can sync while nested, very, very bad */
3447 if (th
->t_refcount
> 1) {
3450 if (journal
->j_len
== 0) {
3451 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3453 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3455 return do_journal_end(th
, p_s_sb
, nblocks
, COMMIT_NOW
| WAIT
);
3459 ** writeback the pending async commits to disk
3461 static void flush_async_commits(void *p
)
3463 struct super_block
*p_s_sb
= p
;
3464 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3465 struct reiserfs_journal_list
*jl
;
3466 struct list_head
*entry
;
3469 if (!list_empty(&journal
->j_journal_list
)) {
3470 /* last entry is the youngest, commit it and you get everything */
3471 entry
= journal
->j_journal_list
.prev
;
3472 jl
= JOURNAL_LIST_ENTRY(entry
);
3473 flush_commit_list(p_s_sb
, jl
, 1);
3479 ** flushes any old transactions to disk
3480 ** ends the current transaction if it is too old
3482 int reiserfs_flush_old_commits(struct super_block
*p_s_sb
)
3485 struct reiserfs_transaction_handle th
;
3486 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3488 now
= get_seconds();
3489 /* safety check so we don't flush while we are replaying the log during
3492 if (list_empty(&journal
->j_journal_list
)) {
3496 /* check the current transaction. If there are no writers, and it is
3497 * too old, finish it, and force the commit blocks to disk
3499 if (atomic_read(&journal
->j_wcount
) <= 0 &&
3500 journal
->j_trans_start_time
> 0 &&
3501 journal
->j_len
> 0 &&
3502 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3503 if (!journal_join(&th
, p_s_sb
, 1)) {
3504 reiserfs_prepare_for_journal(p_s_sb
,
3505 SB_BUFFER_WITH_SB(p_s_sb
),
3507 journal_mark_dirty(&th
, p_s_sb
,
3508 SB_BUFFER_WITH_SB(p_s_sb
));
3510 /* we're only being called from kreiserfsd, it makes no sense to do
3511 ** an async commit so that kreiserfsd can do it later
3513 do_journal_end(&th
, p_s_sb
, 1, COMMIT_NOW
| WAIT
);
3516 return p_s_sb
->s_dirt
;
3520 ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
3522 ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all
3523 ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just
3524 ** flushes the commit list and returns 0.
3526 ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait.
3528 ** Note, we can't allow the journal_end to proceed while there are still writers in the log.
3530 static int check_journal_end(struct reiserfs_transaction_handle
*th
,
3531 struct super_block
*p_s_sb
, unsigned long nblocks
,
3536 int flush
= flags
& FLUSH_ALL
;
3537 int commit_now
= flags
& COMMIT_NOW
;
3538 int wait_on_commit
= flags
& WAIT
;
3539 struct reiserfs_journal_list
*jl
;
3540 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3542 BUG_ON(!th
->t_trans_id
);
3544 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3545 reiserfs_panic(th
->t_super
,
3546 "journal-1577: handle trans id %ld != current trans id %ld\n",
3547 th
->t_trans_id
, journal
->j_trans_id
);
3550 journal
->j_len_alloc
-= (th
->t_blocks_allocated
- th
->t_blocks_logged
);
3551 if (atomic_read(&(journal
->j_wcount
)) > 0) { /* <= 0 is allowed. unmounting might not call begin */
3552 atomic_dec(&(journal
->j_wcount
));
3555 /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released
3556 ** will be dealt with by next transaction that actually writes something, but should be taken
3557 ** care of in this trans
3559 if (journal
->j_len
== 0) {
3562 /* if wcount > 0, and we are called to with flush or commit_now,
3563 ** we wait on j_join_wait. We will wake up when the last writer has
3564 ** finished the transaction, and started it on its way to the disk.
3565 ** Then, we flush the commit or journal list, and just return 0
3566 ** because the rest of journal end was already done for this transaction.
3568 if (atomic_read(&(journal
->j_wcount
)) > 0) {
3569 if (flush
|| commit_now
) {
3572 jl
= journal
->j_current_jl
;
3573 trans_id
= jl
->j_trans_id
;
3575 jl
->j_state
|= LIST_COMMIT_PENDING
;
3576 atomic_set(&(journal
->j_jlock
), 1);
3578 journal
->j_next_full_flush
= 1;
3580 unlock_journal(p_s_sb
);
3582 /* sleep while the current transaction is still j_jlocked */
3583 while (journal
->j_trans_id
== trans_id
) {
3584 if (atomic_read(&journal
->j_jlock
)) {
3585 queue_log_writer(p_s_sb
);
3587 lock_journal(p_s_sb
);
3588 if (journal
->j_trans_id
== trans_id
) {
3589 atomic_set(&(journal
->j_jlock
),
3592 unlock_journal(p_s_sb
);
3595 if (journal
->j_trans_id
== trans_id
) {
3599 && journal_list_still_alive(p_s_sb
, trans_id
)
3600 && wait_on_commit
) {
3601 flush_commit_list(p_s_sb
, jl
, 1);
3605 unlock_journal(p_s_sb
);
3609 /* deal with old transactions where we are the last writers */
3610 now
= get_seconds();
3611 if ((now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3613 journal
->j_next_async_flush
= 1;
3615 /* don't batch when someone is waiting on j_join_wait */
3616 /* don't batch when syncing the commit or flushing the whole trans */
3617 if (!(journal
->j_must_wait
> 0) && !(atomic_read(&(journal
->j_jlock
)))
3618 && !flush
&& !commit_now
&& (journal
->j_len
< journal
->j_max_batch
)
3619 && journal
->j_len_alloc
< journal
->j_max_batch
3620 && journal
->j_cnode_free
> (journal
->j_trans_max
* 3)) {
3621 journal
->j_bcount
++;
3622 unlock_journal(p_s_sb
);
3626 if (journal
->j_start
> SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
3627 reiserfs_panic(p_s_sb
,
3628 "journal-003: journal_end: j_start (%ld) is too high\n",
3635 ** Does all the work that makes deleting blocks safe.
3636 ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
3639 ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes
3640 ** before this transaction has finished.
3642 ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with
3643 ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash,
3644 ** the block can't be reallocated yet.
3646 ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
3648 int journal_mark_freed(struct reiserfs_transaction_handle
*th
,
3649 struct super_block
*p_s_sb
, b_blocknr_t blocknr
)
3651 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3652 struct reiserfs_journal_cnode
*cn
= NULL
;
3653 struct buffer_head
*bh
= NULL
;
3654 struct reiserfs_list_bitmap
*jb
= NULL
;
3656 BUG_ON(!th
->t_trans_id
);
3658 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3663 /* if it is journal new, we just remove it from this transaction */
3664 if (bh
&& buffer_journal_new(bh
)) {
3665 clear_buffer_journal_new(bh
);
3666 clear_prepared_bits(bh
);
3667 reiserfs_clean_and_file_buffer(bh
);
3668 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3670 /* set the bit for this block in the journal bitmap for this transaction */
3671 jb
= journal
->j_current_jl
->j_list_bitmap
;
3673 reiserfs_panic(p_s_sb
,
3674 "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n");
3676 set_bit_in_list_bitmap(p_s_sb
, blocknr
, jb
);
3678 /* Note, the entire while loop is not allowed to schedule. */
3681 clear_prepared_bits(bh
);
3682 reiserfs_clean_and_file_buffer(bh
);
3684 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3686 /* find all older transactions with this block, make sure they don't try to write it out */
3687 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
,
3690 if (p_s_sb
== cn
->sb
&& blocknr
== cn
->blocknr
) {
3691 set_bit(BLOCK_FREED
, &cn
->state
);
3694 /* remove_from_transaction will brelse the buffer if it was
3695 ** in the current trans
3697 clear_buffer_journal_dirty(cn
->
3699 clear_buffer_dirty(cn
->bh
);
3700 clear_buffer_journal_test(cn
->
3705 (&(cn
->bh
->b_count
)) < 0) {
3706 reiserfs_warning(p_s_sb
,
3707 "journal-2138: cn->bh->b_count < 0");
3710 if (cn
->jlist
) { /* since we are clearing the bh, we MUST dec nonzerolen */
3723 put_bh(bh
); /* get_hash grabs the buffer */
3724 if (atomic_read(&(bh
->b_count
)) < 0) {
3725 reiserfs_warning(p_s_sb
,
3726 "journal-2165: bh->b_count < 0");
3732 void reiserfs_update_inode_transaction(struct inode
*inode
)
3734 struct reiserfs_journal
*journal
= SB_JOURNAL(inode
->i_sb
);
3735 REISERFS_I(inode
)->i_jl
= journal
->j_current_jl
;
3736 REISERFS_I(inode
)->i_trans_id
= journal
->j_trans_id
;
3740 * returns -1 on error, 0 if no commits/barriers were done and 1
3741 * if a transaction was actually committed and the barrier was done
3743 static int __commit_trans_jl(struct inode
*inode
, unsigned long id
,
3744 struct reiserfs_journal_list
*jl
)
3746 struct reiserfs_transaction_handle th
;
3747 struct super_block
*sb
= inode
->i_sb
;
3748 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3751 /* is it from the current transaction, or from an unknown transaction? */
3752 if (id
== journal
->j_trans_id
) {
3753 jl
= journal
->j_current_jl
;
3754 /* try to let other writers come in and grow this transaction */
3755 let_transaction_grow(sb
, id
);
3756 if (journal
->j_trans_id
!= id
) {
3757 goto flush_commit_only
;
3760 ret
= journal_begin(&th
, sb
, 1);
3764 /* someone might have ended this transaction while we joined */
3765 if (journal
->j_trans_id
!= id
) {
3766 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
3768 journal_mark_dirty(&th
, sb
, SB_BUFFER_WITH_SB(sb
));
3769 ret
= journal_end(&th
, sb
, 1);
3770 goto flush_commit_only
;
3773 ret
= journal_end_sync(&th
, sb
, 1);
3778 /* this gets tricky, we have to make sure the journal list in
3779 * the inode still exists. We know the list is still around
3780 * if we've got a larger transaction id than the oldest list
3783 if (journal_list_still_alive(inode
->i_sb
, id
)) {
3785 * we only set ret to 1 when we know for sure
3786 * the barrier hasn't been started yet on the commit
3789 if (atomic_read(&jl
->j_commit_left
) > 1)
3791 flush_commit_list(sb
, jl
, 1);
3792 if (journal
->j_errno
)
3793 ret
= journal
->j_errno
;
3796 /* otherwise the list is gone, and long since committed */
3800 int reiserfs_commit_for_inode(struct inode
*inode
)
3802 unsigned long id
= REISERFS_I(inode
)->i_trans_id
;
3803 struct reiserfs_journal_list
*jl
= REISERFS_I(inode
)->i_jl
;
3805 /* for the whole inode, assume unset id means it was
3806 * changed in the current transaction. More conservative
3809 reiserfs_update_inode_transaction(inode
);
3810 id
= REISERFS_I(inode
)->i_trans_id
;
3811 /* jl will be updated in __commit_trans_jl */
3814 return __commit_trans_jl(inode
, id
, jl
);
3817 void reiserfs_restore_prepared_buffer(struct super_block
*p_s_sb
,
3818 struct buffer_head
*bh
)
3820 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3821 PROC_INFO_INC(p_s_sb
, journal
.restore_prepared
);
3825 if (test_clear_buffer_journal_restore_dirty(bh
) &&
3826 buffer_journal_dirty(bh
)) {
3827 struct reiserfs_journal_cnode
*cn
;
3828 cn
= get_journal_hash_dev(p_s_sb
,
3829 journal
->j_list_hash_table
,
3831 if (cn
&& can_dirty(cn
)) {
3832 set_buffer_journal_test(bh
);
3833 mark_buffer_dirty(bh
);
3836 clear_buffer_journal_prepared(bh
);
3839 extern struct tree_balance
*cur_tb
;
3841 ** before we can change a metadata block, we have to make sure it won't
3842 ** be written to disk while we are altering it. So, we must:
3847 int reiserfs_prepare_for_journal(struct super_block
*p_s_sb
,
3848 struct buffer_head
*bh
, int wait
)
3850 PROC_INFO_INC(p_s_sb
, journal
.prepare
);
3852 if (test_set_buffer_locked(bh
)) {
3857 set_buffer_journal_prepared(bh
);
3858 if (test_clear_buffer_dirty(bh
) && buffer_journal_dirty(bh
)) {
3859 clear_buffer_journal_test(bh
);
3860 set_buffer_journal_restore_dirty(bh
);
3866 static void flush_old_journal_lists(struct super_block
*s
)
3868 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
3869 struct reiserfs_journal_list
*jl
;
3870 struct list_head
*entry
;
3871 time_t now
= get_seconds();
3873 while (!list_empty(&journal
->j_journal_list
)) {
3874 entry
= journal
->j_journal_list
.next
;
3875 jl
= JOURNAL_LIST_ENTRY(entry
);
3876 /* this check should always be run, to send old lists to disk */
3877 if (jl
->j_timestamp
< (now
- (JOURNAL_MAX_TRANS_AGE
* 4)) &&
3878 atomic_read(&jl
->j_commit_left
) == 0 &&
3879 test_transaction(s
, jl
)) {
3880 flush_used_journal_lists(s
, jl
);
3888 ** long and ugly. If flush, will not return until all commit
3889 ** blocks and all real buffers in the trans are on disk.
3890 ** If no_async, won't return until all commit blocks are on disk.
3892 ** keep reading, there are comments as you go along
3894 ** If the journal is aborted, we just clean up. Things like flushing
3895 ** journal lists, etc just won't happen.
3897 static int do_journal_end(struct reiserfs_transaction_handle
*th
,
3898 struct super_block
*p_s_sb
, unsigned long nblocks
,
3901 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3902 struct reiserfs_journal_cnode
*cn
, *next
, *jl_cn
;
3903 struct reiserfs_journal_cnode
*last_cn
= NULL
;
3904 struct reiserfs_journal_desc
*desc
;
3905 struct reiserfs_journal_commit
*commit
;
3906 struct buffer_head
*c_bh
; /* commit bh */
3907 struct buffer_head
*d_bh
; /* desc bh */
3908 int cur_write_start
= 0; /* start index of current log write */
3913 struct reiserfs_journal_list
*jl
, *temp_jl
;
3914 struct list_head
*entry
, *safe
;
3915 unsigned long jindex
;
3916 unsigned long commit_trans_id
;
3919 BUG_ON(th
->t_refcount
> 1);
3920 BUG_ON(!th
->t_trans_id
);
3922 /* protect flush_older_commits from doing mistakes if the
3923 transaction ID counter gets overflowed. */
3924 if (th
->t_trans_id
== ~0UL)
3925 flags
|= FLUSH_ALL
| COMMIT_NOW
| WAIT
;
3926 flush
= flags
& FLUSH_ALL
;
3927 wait_on_commit
= flags
& WAIT
;
3930 current
->journal_info
= th
->t_handle_save
;
3931 reiserfs_check_lock_depth(p_s_sb
, "journal end");
3932 if (journal
->j_len
== 0) {
3933 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3935 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3938 lock_journal(p_s_sb
);
3939 if (journal
->j_next_full_flush
) {
3943 if (journal
->j_next_async_flush
) {
3944 flags
|= COMMIT_NOW
| WAIT
;
3948 /* check_journal_end locks the journal, and unlocks if it does not return 1
3949 ** it tells us if we should continue with the journal_end, or just return
3951 if (!check_journal_end(th
, p_s_sb
, nblocks
, flags
)) {
3953 wake_queued_writers(p_s_sb
);
3954 reiserfs_async_progress_wait(p_s_sb
);
3958 /* check_journal_end might set these, check again */
3959 if (journal
->j_next_full_flush
) {
3964 ** j must wait means we have to flush the log blocks, and the real blocks for
3967 if (journal
->j_must_wait
> 0) {
3970 #ifdef REISERFS_PREALLOCATE
3971 /* quota ops might need to nest, setup the journal_info pointer for them
3972 * and raise the refcount so that it is > 0. */
3973 current
->journal_info
= th
;
3975 reiserfs_discard_all_prealloc(th
); /* it should not involve new blocks into
3976 * the transaction */
3978 current
->journal_info
= th
->t_handle_save
;
3981 /* setup description block */
3983 journal_getblk(p_s_sb
,
3984 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3986 set_buffer_uptodate(d_bh
);
3987 desc
= (struct reiserfs_journal_desc
*)(d_bh
)->b_data
;
3988 memset(d_bh
->b_data
, 0, d_bh
->b_size
);
3989 memcpy(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8);
3990 set_desc_trans_id(desc
, journal
->j_trans_id
);
3992 /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */
3993 c_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3994 ((journal
->j_start
+ journal
->j_len
+
3995 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
3996 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
3997 memset(c_bh
->b_data
, 0, c_bh
->b_size
);
3998 set_commit_trans_id(commit
, journal
->j_trans_id
);
3999 set_buffer_uptodate(c_bh
);
4001 /* init this journal list */
4002 jl
= journal
->j_current_jl
;
4004 /* we lock the commit before doing anything because
4005 * we want to make sure nobody tries to run flush_commit_list until
4006 * the new transaction is fully setup, and we've already flushed the
4009 down(&jl
->j_commit_lock
);
4011 /* save the transaction id in case we need to commit it later */
4012 commit_trans_id
= jl
->j_trans_id
;
4014 atomic_set(&jl
->j_older_commits_done
, 0);
4015 jl
->j_trans_id
= journal
->j_trans_id
;
4016 jl
->j_timestamp
= journal
->j_trans_start_time
;
4017 jl
->j_commit_bh
= c_bh
;
4018 jl
->j_start
= journal
->j_start
;
4019 jl
->j_len
= journal
->j_len
;
4020 atomic_set(&jl
->j_nonzerolen
, journal
->j_len
);
4021 atomic_set(&jl
->j_commit_left
, journal
->j_len
+ 2);
4022 jl
->j_realblock
= NULL
;
4024 /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
4025 ** for each real block, add it to the journal list hash,
4026 ** copy into real block index array in the commit or desc block
4028 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
4029 for (i
= 0, cn
= journal
->j_first
; cn
; cn
= cn
->next
, i
++) {
4030 if (buffer_journaled(cn
->bh
)) {
4031 jl_cn
= get_cnode(p_s_sb
);
4033 reiserfs_panic(p_s_sb
,
4034 "journal-1676, get_cnode returned NULL\n");
4037 jl
->j_realblock
= jl_cn
;
4039 jl_cn
->prev
= last_cn
;
4042 last_cn
->next
= jl_cn
;
4045 /* make sure the block we are trying to log is not a block
4046 of journal or reserved area */
4048 if (is_block_in_log_or_reserved_area
4049 (p_s_sb
, cn
->bh
->b_blocknr
)) {
4050 reiserfs_panic(p_s_sb
,
4051 "journal-2332: Trying to log block %lu, which is a log block\n",
4054 jl_cn
->blocknr
= cn
->bh
->b_blocknr
;
4059 insert_journal_hash(journal
->j_list_hash_table
, jl_cn
);
4060 if (i
< trans_half
) {
4061 desc
->j_realblock
[i
] =
4062 cpu_to_le32(cn
->bh
->b_blocknr
);
4064 commit
->j_realblock
[i
- trans_half
] =
4065 cpu_to_le32(cn
->bh
->b_blocknr
);
4071 set_desc_trans_len(desc
, journal
->j_len
);
4072 set_desc_mount_id(desc
, journal
->j_mount_id
);
4073 set_desc_trans_id(desc
, journal
->j_trans_id
);
4074 set_commit_trans_len(commit
, journal
->j_len
);
4076 /* special check in case all buffers in the journal were marked for not logging */
4077 if (journal
->j_len
== 0) {
4081 /* we're about to dirty all the log blocks, mark the description block
4082 * dirty now too. Don't mark the commit block dirty until all the
4083 * others are on disk
4085 mark_buffer_dirty(d_bh
);
4087 /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
4088 cur_write_start
= journal
->j_start
;
4089 cn
= journal
->j_first
;
4090 jindex
= 1; /* start at one so we don't get the desc again */
4092 clear_buffer_journal_new(cn
->bh
);
4093 /* copy all the real blocks into log area. dirty log blocks */
4094 if (buffer_journaled(cn
->bh
)) {
4095 struct buffer_head
*tmp_bh
;
4099 journal_getblk(p_s_sb
,
4100 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
4103 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
4104 set_buffer_uptodate(tmp_bh
);
4105 page
= cn
->bh
->b_page
;
4107 memcpy(tmp_bh
->b_data
,
4108 addr
+ offset_in_page(cn
->bh
->b_data
),
4111 mark_buffer_dirty(tmp_bh
);
4113 set_buffer_journal_dirty(cn
->bh
);
4114 clear_buffer_journaled(cn
->bh
);
4116 /* JDirty cleared sometime during transaction. don't log this one */
4117 reiserfs_warning(p_s_sb
,
4118 "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!");
4122 free_cnode(p_s_sb
, cn
);
4127 /* we are done with both the c_bh and d_bh, but
4128 ** c_bh must be written after all other commit blocks,
4129 ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
4132 journal
->j_current_jl
= alloc_journal_list(p_s_sb
);
4134 /* now it is safe to insert this transaction on the main list */
4135 list_add_tail(&jl
->j_list
, &journal
->j_journal_list
);
4136 list_add_tail(&jl
->j_working_list
, &journal
->j_working_list
);
4137 journal
->j_num_work_lists
++;
4139 /* reset journal values for the next transaction */
4140 old_start
= journal
->j_start
;
4142 (journal
->j_start
+ journal
->j_len
+
4143 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
);
4144 atomic_set(&(journal
->j_wcount
), 0);
4145 journal
->j_bcount
= 0;
4146 journal
->j_last
= NULL
;
4147 journal
->j_first
= NULL
;
4149 journal
->j_trans_start_time
= 0;
4150 /* check for trans_id overflow */
4151 if (++journal
->j_trans_id
== 0)
4152 journal
->j_trans_id
= 10;
4153 journal
->j_current_jl
->j_trans_id
= journal
->j_trans_id
;
4154 journal
->j_must_wait
= 0;
4155 journal
->j_len_alloc
= 0;
4156 journal
->j_next_full_flush
= 0;
4157 journal
->j_next_async_flush
= 0;
4158 init_journal_hash(p_s_sb
);
4160 // make sure reiserfs_add_jh sees the new current_jl before we
4161 // write out the tails
4164 /* tail conversion targets have to hit the disk before we end the
4165 * transaction. Otherwise a later transaction might repack the tail
4166 * before this transaction commits, leaving the data block unflushed and
4167 * clean, if we crash before the later transaction commits, the data block
4170 if (!list_empty(&jl
->j_tail_bh_list
)) {
4172 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
4173 journal
, jl
, &jl
->j_tail_bh_list
);
4176 if (!list_empty(&jl
->j_tail_bh_list
))
4178 up(&jl
->j_commit_lock
);
4180 /* honor the flush wishes from the caller, simple commits can
4181 ** be done outside the journal lock, they are done below
4183 ** if we don't flush the commit list right now, we put it into
4184 ** the work queue so the people waiting on the async progress work
4185 ** queue don't wait for this proc to flush journal lists and such.
4188 flush_commit_list(p_s_sb
, jl
, 1);
4189 flush_journal_list(p_s_sb
, jl
, 1);
4190 } else if (!(jl
->j_state
& LIST_COMMIT_PENDING
))
4191 queue_delayed_work(commit_wq
, &journal
->j_work
, HZ
/ 10);
4193 /* if the next transaction has any chance of wrapping, flush
4194 ** transactions that might get overwritten. If any journal lists are very
4195 ** old flush them as well.
4198 list_for_each_safe(entry
, safe
, &journal
->j_journal_list
) {
4199 temp_jl
= JOURNAL_LIST_ENTRY(entry
);
4200 if (journal
->j_start
<= temp_jl
->j_start
) {
4201 if ((journal
->j_start
+ journal
->j_trans_max
+ 1) >=
4203 flush_used_journal_lists(p_s_sb
, temp_jl
);
4205 } else if ((journal
->j_start
+
4206 journal
->j_trans_max
+ 1) <
4207 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4208 /* if we don't cross into the next transaction and we don't
4209 * wrap, there is no way we can overlap any later transactions
4214 } else if ((journal
->j_start
+
4215 journal
->j_trans_max
+ 1) >
4216 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4217 if (((journal
->j_start
+ journal
->j_trans_max
+ 1) %
4218 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) >=
4220 flush_used_journal_lists(p_s_sb
, temp_jl
);
4223 /* we don't overlap anything from out start to the end of the
4224 * log, and our wrapped portion doesn't overlap anything at
4225 * the start of the log. We can break
4231 flush_old_journal_lists(p_s_sb
);
4233 journal
->j_current_jl
->j_list_bitmap
=
4234 get_list_bitmap(p_s_sb
, journal
->j_current_jl
);
4236 if (!(journal
->j_current_jl
->j_list_bitmap
)) {
4237 reiserfs_panic(p_s_sb
,
4238 "journal-1996: do_journal_end, could not get a list bitmap\n");
4241 atomic_set(&(journal
->j_jlock
), 0);
4242 unlock_journal(p_s_sb
);
4243 /* wake up any body waiting to join. */
4244 clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
4245 wake_up(&(journal
->j_join_wait
));
4247 if (!flush
&& wait_on_commit
&&
4248 journal_list_still_alive(p_s_sb
, commit_trans_id
)) {
4249 flush_commit_list(p_s_sb
, jl
, 1);
4252 reiserfs_check_lock_depth(p_s_sb
, "journal end2");
4254 memset(th
, 0, sizeof(*th
));
4255 /* Re-set th->t_super, so we can properly keep track of how many
4256 * persistent transactions there are. We need to do this so if this
4257 * call is part of a failed restart_transaction, we can free it later */
4258 th
->t_super
= p_s_sb
;
4260 return journal
->j_errno
;
4263 static void __reiserfs_journal_abort_hard(struct super_block
*sb
)
4265 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4266 if (test_bit(J_ABORTED
, &journal
->j_state
))
4269 printk(KERN_CRIT
"REISERFS: Aborting journal for filesystem on %s\n",
4270 reiserfs_bdevname(sb
));
4272 sb
->s_flags
|= MS_RDONLY
;
4273 set_bit(J_ABORTED
, &journal
->j_state
);
4275 #ifdef CONFIG_REISERFS_CHECK
4280 static void __reiserfs_journal_abort_soft(struct super_block
*sb
, int errno
)
4282 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4283 if (test_bit(J_ABORTED
, &journal
->j_state
))
4286 if (!journal
->j_errno
)
4287 journal
->j_errno
= errno
;
4289 __reiserfs_journal_abort_hard(sb
);
4292 void reiserfs_journal_abort(struct super_block
*sb
, int errno
)
4294 return __reiserfs_journal_abort_soft(sb
, errno
);