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 void remove_journal_hash(struct super_block
*,
1190 struct reiserfs_journal_cnode
**,
1191 struct reiserfs_journal_list
*, unsigned long,
1195 ** once all the real blocks have been flushed, it is safe to remove them from the
1196 ** journal list for this transaction. Aside from freeing the cnode, this also allows the
1197 ** block to be reallocated for data blocks if it had been deleted.
1199 static void remove_all_from_journal_list(struct super_block
*p_s_sb
,
1200 struct reiserfs_journal_list
*jl
,
1203 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1204 struct reiserfs_journal_cnode
*cn
, *last
;
1205 cn
= jl
->j_realblock
;
1207 /* which is better, to lock once around the whole loop, or
1208 ** to lock for each call to remove_journal_hash?
1211 if (cn
->blocknr
!= 0) {
1213 reiserfs_warning(p_s_sb
,
1214 "block %u, bh is %d, state %ld",
1215 cn
->blocknr
, cn
->bh
? 1 : 0,
1219 remove_journal_hash(p_s_sb
, journal
->j_list_hash_table
,
1220 jl
, cn
->blocknr
, 1);
1224 free_cnode(p_s_sb
, last
);
1226 jl
->j_realblock
= NULL
;
1230 ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
1231 ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
1232 ** releasing blocks in this transaction for reuse as data blocks.
1233 ** called by flush_journal_list, before it calls remove_all_from_journal_list
1236 static int _update_journal_header_block(struct super_block
*p_s_sb
,
1237 unsigned long offset
,
1238 unsigned long trans_id
)
1240 struct reiserfs_journal_header
*jh
;
1241 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1243 if (reiserfs_is_journal_aborted(journal
))
1246 if (trans_id
>= journal
->j_last_flush_trans_id
) {
1247 if (buffer_locked((journal
->j_header_bh
))) {
1248 wait_on_buffer((journal
->j_header_bh
));
1249 if (unlikely(!buffer_uptodate(journal
->j_header_bh
))) {
1250 #ifdef CONFIG_REISERFS_CHECK
1251 reiserfs_warning(p_s_sb
,
1252 "journal-699: buffer write failed");
1257 journal
->j_last_flush_trans_id
= trans_id
;
1258 journal
->j_first_unflushed_offset
= offset
;
1259 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->
1261 jh
->j_last_flush_trans_id
= cpu_to_le32(trans_id
);
1262 jh
->j_first_unflushed_offset
= cpu_to_le32(offset
);
1263 jh
->j_mount_id
= cpu_to_le32(journal
->j_mount_id
);
1265 if (reiserfs_barrier_flush(p_s_sb
)) {
1267 lock_buffer(journal
->j_header_bh
);
1268 ret
= submit_barrier_buffer(journal
->j_header_bh
);
1269 if (ret
== -EOPNOTSUPP
) {
1270 set_buffer_uptodate(journal
->j_header_bh
);
1271 disable_barrier(p_s_sb
);
1274 wait_on_buffer(journal
->j_header_bh
);
1275 check_barrier_completion(p_s_sb
, journal
->j_header_bh
);
1278 set_buffer_dirty(journal
->j_header_bh
);
1279 sync_dirty_buffer(journal
->j_header_bh
);
1281 if (!buffer_uptodate(journal
->j_header_bh
)) {
1282 reiserfs_warning(p_s_sb
,
1283 "journal-837: IO error during journal replay");
1290 static int update_journal_header_block(struct super_block
*p_s_sb
,
1291 unsigned long offset
,
1292 unsigned long trans_id
)
1294 return _update_journal_header_block(p_s_sb
, offset
, trans_id
);
1298 ** flush any and all journal lists older than you are
1299 ** can only be called from flush_journal_list
1301 static int flush_older_journal_lists(struct super_block
*p_s_sb
,
1302 struct reiserfs_journal_list
*jl
)
1304 struct list_head
*entry
;
1305 struct reiserfs_journal_list
*other_jl
;
1306 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1307 unsigned long trans_id
= jl
->j_trans_id
;
1309 /* we know we are the only ones flushing things, no extra race
1310 * protection is required.
1313 entry
= journal
->j_journal_list
.next
;
1315 if (entry
== &journal
->j_journal_list
)
1317 other_jl
= JOURNAL_LIST_ENTRY(entry
);
1318 if (other_jl
->j_trans_id
< trans_id
) {
1319 BUG_ON(other_jl
->j_refcount
<= 0);
1320 /* do not flush all */
1321 flush_journal_list(p_s_sb
, other_jl
, 0);
1323 /* other_jl is now deleted from the list */
1329 static void del_from_work_list(struct super_block
*s
,
1330 struct reiserfs_journal_list
*jl
)
1332 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1333 if (!list_empty(&jl
->j_working_list
)) {
1334 list_del_init(&jl
->j_working_list
);
1335 journal
->j_num_work_lists
--;
1339 /* flush a journal list, both commit and real blocks
1341 ** always set flushall to 1, unless you are calling from inside
1342 ** flush_journal_list
1344 ** IMPORTANT. This can only be called while there are no journal writers,
1345 ** and the journal is locked. That means it can only be called from
1346 ** do_journal_end, or by journal_release
1348 static int flush_journal_list(struct super_block
*s
,
1349 struct reiserfs_journal_list
*jl
, int flushall
)
1351 struct reiserfs_journal_list
*pjl
;
1352 struct reiserfs_journal_cnode
*cn
, *last
;
1356 struct buffer_head
*saved_bh
;
1357 unsigned long j_len_saved
= jl
->j_len
;
1358 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1361 BUG_ON(j_len_saved
<= 0);
1363 if (atomic_read(&journal
->j_wcount
) != 0) {
1365 "clm-2048: flush_journal_list called with wcount %d",
1366 atomic_read(&journal
->j_wcount
));
1368 BUG_ON(jl
->j_trans_id
== 0);
1370 /* if flushall == 0, the lock is already held */
1372 down(&journal
->j_flush_sem
);
1373 } else if (!down_trylock(&journal
->j_flush_sem
)) {
1378 if (j_len_saved
> journal
->j_trans_max
) {
1380 "journal-715: flush_journal_list, length is %lu, trans id %lu\n",
1381 j_len_saved
, jl
->j_trans_id
);
1387 /* if all the work is already done, get out of here */
1388 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1389 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1390 goto flush_older_and_return
;
1393 /* start by putting the commit list on disk. This will also flush
1394 ** the commit lists of any olders transactions
1396 flush_commit_list(s
, jl
, 1);
1398 if (!(jl
->j_state
& LIST_DIRTY
)
1399 && !reiserfs_is_journal_aborted(journal
))
1402 /* are we done now? */
1403 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1404 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1405 goto flush_older_and_return
;
1408 /* loop through each cnode, see if we need to write it,
1409 ** or wait on a more recent transaction, or just ignore it
1411 if (atomic_read(&(journal
->j_wcount
)) != 0) {
1413 "journal-844: panic journal list is flushing, wcount is not 0\n");
1415 cn
= jl
->j_realblock
;
1420 /* blocknr of 0 is no longer in the hash, ignore it */
1421 if (cn
->blocknr
== 0) {
1425 /* This transaction failed commit. Don't write out to the disk */
1426 if (!(jl
->j_state
& LIST_DIRTY
))
1429 pjl
= find_newer_jl_for_cn(cn
);
1430 /* the order is important here. We check pjl to make sure we
1431 ** don't clear BH_JDirty_wait if we aren't the one writing this
1434 if (!pjl
&& cn
->bh
) {
1437 /* we do this to make sure nobody releases the buffer while
1438 ** we are working with it
1442 if (buffer_journal_dirty(saved_bh
)) {
1443 BUG_ON(!can_dirty(cn
));
1446 } else if (can_dirty(cn
)) {
1447 /* everything with !pjl && jwait should be writable */
1452 /* if someone has this block in a newer transaction, just make
1453 ** sure they are commited, and don't try writing it to disk
1456 if (atomic_read(&pjl
->j_commit_left
))
1457 flush_commit_list(s
, pjl
, 1);
1461 /* bh == NULL when the block got to disk on its own, OR,
1462 ** the block got freed in a future transaction
1464 if (saved_bh
== NULL
) {
1468 /* this should never happen. kupdate_one_transaction has this list
1469 ** locked while it works, so we should never see a buffer here that
1470 ** is not marked JDirty_wait
1472 if ((!was_jwait
) && !buffer_locked(saved_bh
)) {
1474 "journal-813: BAD! buffer %llu %cdirty %cjwait, "
1475 "not in a newer tranasction",
1476 (unsigned long long)saved_bh
->
1477 b_blocknr
, was_dirty
? ' ' : '!',
1478 was_jwait
? ' ' : '!');
1481 /* we inc again because saved_bh gets decremented at free_cnode */
1483 set_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
);
1484 lock_buffer(saved_bh
);
1485 BUG_ON(cn
->blocknr
!= saved_bh
->b_blocknr
);
1486 if (buffer_dirty(saved_bh
))
1487 submit_logged_buffer(saved_bh
);
1489 unlock_buffer(saved_bh
);
1493 "clm-2082: Unable to flush buffer %llu in %s",
1494 (unsigned long long)saved_bh
->
1495 b_blocknr
, __FUNCTION__
);
1501 /* we incremented this to keep others from taking the buffer head away */
1503 if (atomic_read(&(saved_bh
->b_count
)) < 0) {
1505 "journal-945: saved_bh->b_count < 0");
1510 cn
= jl
->j_realblock
;
1512 if (test_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
)) {
1515 "journal-1011: cn->bh is NULL\n");
1517 wait_on_buffer(cn
->bh
);
1520 "journal-1012: cn->bh is NULL\n");
1522 if (unlikely(!buffer_uptodate(cn
->bh
))) {
1523 #ifdef CONFIG_REISERFS_CHECK
1525 "journal-949: buffer write failed\n");
1529 /* note, we must clear the JDirty_wait bit after the up to date
1530 ** check, otherwise we race against our flushpage routine
1532 BUG_ON(!test_clear_buffer_journal_dirty
1535 /* undo the inc from journal_mark_dirty */
1544 reiserfs_abort(s
, -EIO
,
1545 "Write error while pushing transaction to disk in %s",
1547 flush_older_and_return
:
1549 /* before we can update the journal header block, we _must_ flush all
1550 ** real blocks from all older transactions to disk. This is because
1551 ** once the header block is updated, this transaction will not be
1552 ** replayed after a crash
1555 flush_older_journal_lists(s
, jl
);
1558 err
= journal
->j_errno
;
1559 /* before we can remove everything from the hash tables for this
1560 ** transaction, we must make sure it can never be replayed
1562 ** since we are only called from do_journal_end, we know for sure there
1563 ** are no allocations going on while we are flushing journal lists. So,
1564 ** we only need to update the journal header block for the last list
1567 if (!err
&& flushall
) {
1569 update_journal_header_block(s
,
1570 (jl
->j_start
+ jl
->j_len
+
1571 2) % SB_ONDISK_JOURNAL_SIZE(s
),
1574 reiserfs_abort(s
, -EIO
,
1575 "Write error while updating journal header in %s",
1578 remove_all_from_journal_list(s
, jl
, 0);
1579 list_del_init(&jl
->j_list
);
1580 journal
->j_num_lists
--;
1581 del_from_work_list(s
, jl
);
1583 if (journal
->j_last_flush_id
!= 0 &&
1584 (jl
->j_trans_id
- journal
->j_last_flush_id
) != 1) {
1585 reiserfs_warning(s
, "clm-2201: last flush %lu, current %lu",
1586 journal
->j_last_flush_id
, jl
->j_trans_id
);
1588 journal
->j_last_flush_id
= jl
->j_trans_id
;
1590 /* not strictly required since we are freeing the list, but it should
1591 * help find code using dead lists later on
1594 atomic_set(&(jl
->j_nonzerolen
), 0);
1596 jl
->j_realblock
= NULL
;
1597 jl
->j_commit_bh
= NULL
;
1600 put_journal_list(s
, jl
);
1602 up(&journal
->j_flush_sem
);
1607 static int write_one_transaction(struct super_block
*s
,
1608 struct reiserfs_journal_list
*jl
,
1609 struct buffer_chunk
*chunk
)
1611 struct reiserfs_journal_cnode
*cn
;
1614 jl
->j_state
|= LIST_TOUCHED
;
1615 del_from_work_list(s
, jl
);
1616 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0) {
1620 cn
= jl
->j_realblock
;
1622 /* if the blocknr == 0, this has been cleared from the hash,
1625 if (cn
->blocknr
== 0) {
1628 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(cn
->bh
)) {
1629 struct buffer_head
*tmp_bh
;
1630 /* we can race against journal_mark_freed when we try
1631 * to lock_buffer(cn->bh), so we have to inc the buffer
1632 * count, and recheck things after locking
1636 lock_buffer(tmp_bh
);
1637 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(tmp_bh
)) {
1638 if (!buffer_journal_dirty(tmp_bh
) ||
1639 buffer_journal_prepared(tmp_bh
))
1641 add_to_chunk(chunk
, tmp_bh
, NULL
, write_chunk
);
1644 /* note, cn->bh might be null now */
1645 unlock_buffer(tmp_bh
);
1656 /* used by flush_commit_list */
1657 static int dirty_one_transaction(struct super_block
*s
,
1658 struct reiserfs_journal_list
*jl
)
1660 struct reiserfs_journal_cnode
*cn
;
1661 struct reiserfs_journal_list
*pjl
;
1664 jl
->j_state
|= LIST_DIRTY
;
1665 cn
= jl
->j_realblock
;
1667 /* look for a more recent transaction that logged this
1668 ** buffer. Only the most recent transaction with a buffer in
1669 ** it is allowed to send that buffer to disk
1671 pjl
= find_newer_jl_for_cn(cn
);
1672 if (!pjl
&& cn
->blocknr
&& cn
->bh
1673 && buffer_journal_dirty(cn
->bh
)) {
1674 BUG_ON(!can_dirty(cn
));
1675 /* if the buffer is prepared, it will either be logged
1676 * or restored. If restored, we need to make sure
1677 * it actually gets marked dirty
1679 clear_buffer_journal_new(cn
->bh
);
1680 if (buffer_journal_prepared(cn
->bh
)) {
1681 set_buffer_journal_restore_dirty(cn
->bh
);
1683 set_buffer_journal_test(cn
->bh
);
1684 mark_buffer_dirty(cn
->bh
);
1692 static int kupdate_transactions(struct super_block
*s
,
1693 struct reiserfs_journal_list
*jl
,
1694 struct reiserfs_journal_list
**next_jl
,
1695 unsigned long *next_trans_id
,
1696 int num_blocks
, int num_trans
)
1700 int transactions_flushed
= 0;
1701 unsigned long orig_trans_id
= jl
->j_trans_id
;
1702 struct buffer_chunk chunk
;
1703 struct list_head
*entry
;
1704 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1707 down(&journal
->j_flush_sem
);
1708 if (!journal_list_still_alive(s
, orig_trans_id
)) {
1712 /* we've got j_flush_sem held, nobody is going to delete any
1713 * of these lists out from underneath us
1715 while ((num_trans
&& transactions_flushed
< num_trans
) ||
1716 (!num_trans
&& written
< num_blocks
)) {
1718 if (jl
->j_len
== 0 || (jl
->j_state
& LIST_TOUCHED
) ||
1719 atomic_read(&jl
->j_commit_left
)
1720 || !(jl
->j_state
& LIST_DIRTY
)) {
1721 del_from_work_list(s
, jl
);
1724 ret
= write_one_transaction(s
, jl
, &chunk
);
1728 transactions_flushed
++;
1730 entry
= jl
->j_list
.next
;
1733 if (entry
== &journal
->j_journal_list
) {
1736 jl
= JOURNAL_LIST_ENTRY(entry
);
1738 /* don't bother with older transactions */
1739 if (jl
->j_trans_id
<= orig_trans_id
)
1743 write_chunk(&chunk
);
1747 up(&journal
->j_flush_sem
);
1751 /* for o_sync and fsync heavy applications, they tend to use
1752 ** all the journa list slots with tiny transactions. These
1753 ** trigger lots and lots of calls to update the header block, which
1754 ** adds seeks and slows things down.
1756 ** This function tries to clear out a large chunk of the journal lists
1757 ** at once, which makes everything faster since only the newest journal
1758 ** list updates the header block
1760 static int flush_used_journal_lists(struct super_block
*s
,
1761 struct reiserfs_journal_list
*jl
)
1763 unsigned long len
= 0;
1764 unsigned long cur_len
;
1768 struct reiserfs_journal_list
*tjl
;
1769 struct reiserfs_journal_list
*flush_jl
;
1770 unsigned long trans_id
;
1771 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1773 flush_jl
= tjl
= jl
;
1775 /* in data logging mode, try harder to flush a lot of blocks */
1776 if (reiserfs_data_log(s
))
1778 /* flush for 256 transactions or limit blocks, whichever comes first */
1779 for (i
= 0; i
< 256 && len
< limit
; i
++) {
1780 if (atomic_read(&tjl
->j_commit_left
) ||
1781 tjl
->j_trans_id
< jl
->j_trans_id
) {
1784 cur_len
= atomic_read(&tjl
->j_nonzerolen
);
1786 tjl
->j_state
&= ~LIST_TOUCHED
;
1790 if (tjl
->j_list
.next
== &journal
->j_journal_list
)
1792 tjl
= JOURNAL_LIST_ENTRY(tjl
->j_list
.next
);
1794 /* try to find a group of blocks we can flush across all the
1795 ** transactions, but only bother if we've actually spanned
1796 ** across multiple lists
1798 if (flush_jl
!= jl
) {
1799 ret
= kupdate_transactions(s
, jl
, &tjl
, &trans_id
, len
, i
);
1801 flush_journal_list(s
, flush_jl
, 1);
1806 ** removes any nodes in table with name block and dev as bh.
1807 ** only touchs the hnext and hprev pointers.
1809 void remove_journal_hash(struct super_block
*sb
,
1810 struct reiserfs_journal_cnode
**table
,
1811 struct reiserfs_journal_list
*jl
,
1812 unsigned long block
, int remove_freed
)
1814 struct reiserfs_journal_cnode
*cur
;
1815 struct reiserfs_journal_cnode
**head
;
1817 head
= &(journal_hash(table
, sb
, block
));
1823 if (cur
->blocknr
== block
&& cur
->sb
== sb
1824 && (jl
== NULL
|| jl
== cur
->jlist
)
1825 && (!test_bit(BLOCK_FREED
, &cur
->state
) || remove_freed
)) {
1827 cur
->hnext
->hprev
= cur
->hprev
;
1830 cur
->hprev
->hnext
= cur
->hnext
;
1837 if (cur
->bh
&& cur
->jlist
) /* anybody who clears the cur->bh will also dec the nonzerolen */
1838 atomic_dec(&(cur
->jlist
->j_nonzerolen
));
1846 static void free_journal_ram(struct super_block
*p_s_sb
)
1848 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1849 kfree(journal
->j_current_jl
);
1850 journal
->j_num_lists
--;
1852 vfree(journal
->j_cnode_free_orig
);
1853 free_list_bitmaps(p_s_sb
, journal
->j_list_bitmap
);
1854 free_bitmap_nodes(p_s_sb
); /* must be after free_list_bitmaps */
1855 if (journal
->j_header_bh
) {
1856 brelse(journal
->j_header_bh
);
1858 /* j_header_bh is on the journal dev, make sure not to release the journal
1859 * dev until we brelse j_header_bh
1861 release_journal_dev(p_s_sb
, journal
);
1866 ** call on unmount. Only set error to 1 if you haven't made your way out
1867 ** of read_super() yet. Any other caller must keep error at 0.
1869 static int do_journal_release(struct reiserfs_transaction_handle
*th
,
1870 struct super_block
*p_s_sb
, int error
)
1872 struct reiserfs_transaction_handle myth
;
1874 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1876 /* we only want to flush out transactions if we were called with error == 0
1878 if (!error
&& !(p_s_sb
->s_flags
& MS_RDONLY
)) {
1879 /* end the current trans */
1880 BUG_ON(!th
->t_trans_id
);
1881 do_journal_end(th
, p_s_sb
, 10, FLUSH_ALL
);
1883 /* make sure something gets logged to force our way into the flush code */
1884 if (!journal_join(&myth
, p_s_sb
, 1)) {
1885 reiserfs_prepare_for_journal(p_s_sb
,
1886 SB_BUFFER_WITH_SB(p_s_sb
),
1888 journal_mark_dirty(&myth
, p_s_sb
,
1889 SB_BUFFER_WITH_SB(p_s_sb
));
1890 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1895 /* this also catches errors during the do_journal_end above */
1896 if (!error
&& reiserfs_is_journal_aborted(journal
)) {
1897 memset(&myth
, 0, sizeof(myth
));
1898 if (!journal_join_abort(&myth
, p_s_sb
, 1)) {
1899 reiserfs_prepare_for_journal(p_s_sb
,
1900 SB_BUFFER_WITH_SB(p_s_sb
),
1902 journal_mark_dirty(&myth
, p_s_sb
,
1903 SB_BUFFER_WITH_SB(p_s_sb
));
1904 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1908 reiserfs_mounted_fs_count
--;
1909 /* wait for all commits to finish */
1910 cancel_delayed_work(&SB_JOURNAL(p_s_sb
)->j_work
);
1911 flush_workqueue(commit_wq
);
1912 if (!reiserfs_mounted_fs_count
) {
1913 destroy_workqueue(commit_wq
);
1917 free_journal_ram(p_s_sb
);
1923 ** call on unmount. flush all journal trans, release all alloc'd ram
1925 int journal_release(struct reiserfs_transaction_handle
*th
,
1926 struct super_block
*p_s_sb
)
1928 return do_journal_release(th
, p_s_sb
, 0);
1932 ** only call from an error condition inside reiserfs_read_super!
1934 int journal_release_error(struct reiserfs_transaction_handle
*th
,
1935 struct super_block
*p_s_sb
)
1937 return do_journal_release(th
, p_s_sb
, 1);
1940 /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */
1941 static int journal_compare_desc_commit(struct super_block
*p_s_sb
,
1942 struct reiserfs_journal_desc
*desc
,
1943 struct reiserfs_journal_commit
*commit
)
1945 if (get_commit_trans_id(commit
) != get_desc_trans_id(desc
) ||
1946 get_commit_trans_len(commit
) != get_desc_trans_len(desc
) ||
1947 get_commit_trans_len(commit
) > SB_JOURNAL(p_s_sb
)->j_trans_max
||
1948 get_commit_trans_len(commit
) <= 0) {
1954 /* returns 0 if it did not find a description block
1955 ** returns -1 if it found a corrupt commit block
1956 ** returns 1 if both desc and commit were valid
1958 static int journal_transaction_is_valid(struct super_block
*p_s_sb
,
1959 struct buffer_head
*d_bh
,
1960 unsigned long *oldest_invalid_trans_id
,
1961 unsigned long *newest_mount_id
)
1963 struct reiserfs_journal_desc
*desc
;
1964 struct reiserfs_journal_commit
*commit
;
1965 struct buffer_head
*c_bh
;
1966 unsigned long offset
;
1971 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
1972 if (get_desc_trans_len(desc
) > 0
1973 && !memcmp(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8)) {
1974 if (oldest_invalid_trans_id
&& *oldest_invalid_trans_id
1975 && get_desc_trans_id(desc
) > *oldest_invalid_trans_id
) {
1976 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
1977 "journal-986: transaction "
1978 "is valid returning because trans_id %d is greater than "
1979 "oldest_invalid %lu",
1980 get_desc_trans_id(desc
),
1981 *oldest_invalid_trans_id
);
1985 && *newest_mount_id
> get_desc_mount_id(desc
)) {
1986 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
1987 "journal-1087: transaction "
1988 "is valid returning because mount_id %d is less than "
1989 "newest_mount_id %lu",
1990 get_desc_mount_id(desc
),
1994 if (get_desc_trans_len(desc
) > SB_JOURNAL(p_s_sb
)->j_trans_max
) {
1995 reiserfs_warning(p_s_sb
,
1996 "journal-2018: Bad transaction length %d encountered, ignoring transaction",
1997 get_desc_trans_len(desc
));
2000 offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2002 /* ok, we have a journal description block, lets see if the transaction was valid */
2004 journal_bread(p_s_sb
,
2005 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2006 ((offset
+ get_desc_trans_len(desc
) +
2007 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2010 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2011 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2012 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2013 "journal_transaction_is_valid, commit offset %ld had bad "
2014 "time %d or length %d",
2016 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2017 get_commit_trans_id(commit
),
2018 get_commit_trans_len(commit
));
2020 if (oldest_invalid_trans_id
) {
2021 *oldest_invalid_trans_id
=
2022 get_desc_trans_id(desc
);
2023 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2025 "transaction_is_valid setting oldest invalid trans_id "
2027 get_desc_trans_id(desc
));
2032 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2033 "journal-1006: found valid "
2034 "transaction start offset %llu, len %d id %d",
2036 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2037 get_desc_trans_len(desc
),
2038 get_desc_trans_id(desc
));
2045 static void brelse_array(struct buffer_head
**heads
, int num
)
2048 for (i
= 0; i
< num
; i
++) {
2054 ** given the start, and values for the oldest acceptable transactions,
2055 ** this either reads in a replays a transaction, or returns because the transaction
2056 ** is invalid, or too old.
2058 static int journal_read_transaction(struct super_block
*p_s_sb
,
2059 unsigned long cur_dblock
,
2060 unsigned long oldest_start
,
2061 unsigned long oldest_trans_id
,
2062 unsigned long newest_mount_id
)
2064 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2065 struct reiserfs_journal_desc
*desc
;
2066 struct reiserfs_journal_commit
*commit
;
2067 unsigned long trans_id
= 0;
2068 struct buffer_head
*c_bh
;
2069 struct buffer_head
*d_bh
;
2070 struct buffer_head
**log_blocks
= NULL
;
2071 struct buffer_head
**real_blocks
= NULL
;
2072 unsigned long trans_offset
;
2076 d_bh
= journal_bread(p_s_sb
, cur_dblock
);
2079 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2080 trans_offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2081 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1037: "
2082 "journal_read_transaction, offset %llu, len %d mount_id %d",
2083 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2084 get_desc_trans_len(desc
), get_desc_mount_id(desc
));
2085 if (get_desc_trans_id(desc
) < oldest_trans_id
) {
2086 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1039: "
2087 "journal_read_trans skipping because %lu is too old",
2089 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2093 if (get_desc_mount_id(desc
) != newest_mount_id
) {
2094 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1146: "
2095 "journal_read_trans skipping because %d is != "
2096 "newest_mount_id %lu", get_desc_mount_id(desc
),
2101 c_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2102 ((trans_offset
+ get_desc_trans_len(desc
) + 1) %
2103 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2108 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2109 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2110 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2111 "journal_read_transaction, "
2112 "commit offset %llu had bad time %d or length %d",
2114 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2115 get_commit_trans_id(commit
),
2116 get_commit_trans_len(commit
));
2121 trans_id
= get_desc_trans_id(desc
);
2122 /* now we know we've got a good transaction, and it was inside the valid time ranges */
2123 log_blocks
= kmalloc(get_desc_trans_len(desc
) *
2124 sizeof(struct buffer_head
*), GFP_NOFS
);
2125 real_blocks
= kmalloc(get_desc_trans_len(desc
) *
2126 sizeof(struct buffer_head
*), GFP_NOFS
);
2127 if (!log_blocks
|| !real_blocks
) {
2132 reiserfs_warning(p_s_sb
,
2133 "journal-1169: kmalloc failed, unable to mount FS");
2136 /* get all the buffer heads */
2137 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
2138 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2140 journal_getblk(p_s_sb
,
2141 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2143 i
) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2144 if (i
< trans_half
) {
2147 le32_to_cpu(desc
->j_realblock
[i
]));
2151 le32_to_cpu(commit
->
2152 j_realblock
[i
- trans_half
]));
2154 if (real_blocks
[i
]->b_blocknr
> SB_BLOCK_COUNT(p_s_sb
)) {
2155 reiserfs_warning(p_s_sb
,
2156 "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
2159 /* make sure we don't try to replay onto log or reserved area */
2160 if (is_block_in_log_or_reserved_area
2161 (p_s_sb
, real_blocks
[i
]->b_blocknr
)) {
2162 reiserfs_warning(p_s_sb
,
2163 "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block");
2165 brelse_array(log_blocks
, i
);
2166 brelse_array(real_blocks
, i
);
2174 /* read in the log blocks, memcpy to the corresponding real block */
2175 ll_rw_block(READ
, get_desc_trans_len(desc
), log_blocks
);
2176 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2177 wait_on_buffer(log_blocks
[i
]);
2178 if (!buffer_uptodate(log_blocks
[i
])) {
2179 reiserfs_warning(p_s_sb
,
2180 "journal-1212: REPLAY FAILURE fsck required! buffer write failed");
2181 brelse_array(log_blocks
+ i
,
2182 get_desc_trans_len(desc
) - i
);
2183 brelse_array(real_blocks
, get_desc_trans_len(desc
));
2190 memcpy(real_blocks
[i
]->b_data
, log_blocks
[i
]->b_data
,
2191 real_blocks
[i
]->b_size
);
2192 set_buffer_uptodate(real_blocks
[i
]);
2193 brelse(log_blocks
[i
]);
2195 /* flush out the real blocks */
2196 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2197 set_buffer_dirty(real_blocks
[i
]);
2198 ll_rw_block(SWRITE
, 1, real_blocks
+ i
);
2200 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2201 wait_on_buffer(real_blocks
[i
]);
2202 if (!buffer_uptodate(real_blocks
[i
])) {
2203 reiserfs_warning(p_s_sb
,
2204 "journal-1226: REPLAY FAILURE, fsck required! buffer write failed");
2205 brelse_array(real_blocks
+ i
,
2206 get_desc_trans_len(desc
) - i
);
2213 brelse(real_blocks
[i
]);
2216 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2217 ((trans_offset
+ get_desc_trans_len(desc
) +
2218 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2219 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2220 "journal-1095: setting journal " "start to offset %ld",
2221 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2223 /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
2224 journal
->j_start
= cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2225 journal
->j_last_flush_trans_id
= trans_id
;
2226 journal
->j_trans_id
= trans_id
+ 1;
2227 /* check for trans_id overflow */
2228 if (journal
->j_trans_id
== 0)
2229 journal
->j_trans_id
= 10;
2237 /* This function reads blocks starting from block and to max_block of bufsize
2238 size (but no more than BUFNR blocks at a time). This proved to improve
2239 mounting speed on self-rebuilding raid5 arrays at least.
2240 Right now it is only used from journal code. But later we might use it
2242 Note: Do not use journal_getblk/sb_getblk functions here! */
2243 static struct buffer_head
*reiserfs_breada(struct block_device
*dev
, int block
,
2244 int bufsize
, unsigned int max_block
)
2246 struct buffer_head
*bhlist
[BUFNR
];
2247 unsigned int blocks
= BUFNR
;
2248 struct buffer_head
*bh
;
2251 bh
= __getblk(dev
, block
, bufsize
);
2252 if (buffer_uptodate(bh
))
2255 if (block
+ BUFNR
> max_block
) {
2256 blocks
= max_block
- block
;
2260 for (i
= 1; i
< blocks
; i
++) {
2261 bh
= __getblk(dev
, block
+ i
, bufsize
);
2262 if (buffer_uptodate(bh
)) {
2268 ll_rw_block(READ
, j
, bhlist
);
2269 for (i
= 1; i
< j
; i
++)
2273 if (buffer_uptodate(bh
))
2280 ** read and replay the log
2281 ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
2282 ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast.
2284 ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
2286 ** On exit, it sets things up so the first transaction will work correctly.
2288 static int journal_read(struct super_block
*p_s_sb
)
2290 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2291 struct reiserfs_journal_desc
*desc
;
2292 unsigned long oldest_trans_id
= 0;
2293 unsigned long oldest_invalid_trans_id
= 0;
2295 unsigned long oldest_start
= 0;
2296 unsigned long cur_dblock
= 0;
2297 unsigned long newest_mount_id
= 9;
2298 struct buffer_head
*d_bh
;
2299 struct reiserfs_journal_header
*jh
;
2300 int valid_journal_header
= 0;
2301 int replay_count
= 0;
2302 int continue_replay
= 1;
2304 char b
[BDEVNAME_SIZE
];
2306 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2307 reiserfs_info(p_s_sb
, "checking transaction log (%s)\n",
2308 bdevname(journal
->j_dev_bd
, b
));
2309 start
= get_seconds();
2311 /* step 1, read in the journal header block. Check the transaction it says
2312 ** is the first unflushed, and if that transaction is not valid,
2315 journal
->j_header_bh
= journal_bread(p_s_sb
,
2316 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
)
2317 + SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2318 if (!journal
->j_header_bh
) {
2321 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
);
2322 if (le32_to_cpu(jh
->j_first_unflushed_offset
) <
2323 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)
2324 && le32_to_cpu(jh
->j_last_flush_trans_id
) > 0) {
2326 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2327 le32_to_cpu(jh
->j_first_unflushed_offset
);
2328 oldest_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2329 newest_mount_id
= le32_to_cpu(jh
->j_mount_id
);
2330 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2331 "journal-1153: found in "
2332 "header: first_unflushed_offset %d, last_flushed_trans_id "
2333 "%lu", le32_to_cpu(jh
->j_first_unflushed_offset
),
2334 le32_to_cpu(jh
->j_last_flush_trans_id
));
2335 valid_journal_header
= 1;
2337 /* now, we try to read the first unflushed offset. If it is not valid,
2338 ** there is nothing more we can do, and it makes no sense to read
2339 ** through the whole log.
2342 journal_bread(p_s_sb
,
2343 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2344 le32_to_cpu(jh
->j_first_unflushed_offset
));
2345 ret
= journal_transaction_is_valid(p_s_sb
, d_bh
, NULL
, NULL
);
2347 continue_replay
= 0;
2350 goto start_log_replay
;
2353 if (continue_replay
&& bdev_read_only(p_s_sb
->s_bdev
)) {
2354 reiserfs_warning(p_s_sb
,
2355 "clm-2076: device is readonly, unable to replay log");
2359 /* ok, there are transactions that need to be replayed. start with the first log block, find
2360 ** all the valid transactions, and pick out the oldest.
2362 while (continue_replay
2364 (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2365 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) {
2366 /* Note that it is required for blocksize of primary fs device and journal
2367 device to be the same */
2369 reiserfs_breada(journal
->j_dev_bd
, cur_dblock
,
2370 p_s_sb
->s_blocksize
,
2371 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2372 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2374 journal_transaction_is_valid(p_s_sb
, d_bh
,
2375 &oldest_invalid_trans_id
,
2378 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2379 if (oldest_start
== 0) { /* init all oldest_ values */
2380 oldest_trans_id
= get_desc_trans_id(desc
);
2381 oldest_start
= d_bh
->b_blocknr
;
2382 newest_mount_id
= get_desc_mount_id(desc
);
2383 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2384 "journal-1179: Setting "
2385 "oldest_start to offset %llu, trans_id %lu",
2387 SB_ONDISK_JOURNAL_1st_BLOCK
2388 (p_s_sb
), oldest_trans_id
);
2389 } else if (oldest_trans_id
> get_desc_trans_id(desc
)) {
2390 /* one we just read was older */
2391 oldest_trans_id
= get_desc_trans_id(desc
);
2392 oldest_start
= d_bh
->b_blocknr
;
2393 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2394 "journal-1180: Resetting "
2395 "oldest_start to offset %lu, trans_id %lu",
2397 SB_ONDISK_JOURNAL_1st_BLOCK
2398 (p_s_sb
), oldest_trans_id
);
2400 if (newest_mount_id
< get_desc_mount_id(desc
)) {
2401 newest_mount_id
= get_desc_mount_id(desc
);
2402 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2403 "journal-1299: Setting "
2404 "newest_mount_id to %d",
2405 get_desc_mount_id(desc
));
2407 cur_dblock
+= get_desc_trans_len(desc
) + 2;
2415 cur_dblock
= oldest_start
;
2416 if (oldest_trans_id
) {
2417 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2418 "journal-1206: Starting replay "
2419 "from offset %llu, trans_id %lu",
2420 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2425 while (continue_replay
&& oldest_trans_id
> 0) {
2427 journal_read_transaction(p_s_sb
, cur_dblock
, oldest_start
,
2428 oldest_trans_id
, newest_mount_id
);
2431 } else if (ret
!= 0) {
2435 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + journal
->j_start
;
2437 if (cur_dblock
== oldest_start
)
2441 if (oldest_trans_id
== 0) {
2442 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2443 "journal-1225: No valid " "transactions found");
2445 /* j_start does not get set correctly if we don't replay any transactions.
2446 ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
2447 ** copy the trans_id from the header
2449 if (valid_journal_header
&& replay_count
== 0) {
2450 journal
->j_start
= le32_to_cpu(jh
->j_first_unflushed_offset
);
2451 journal
->j_trans_id
=
2452 le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2453 /* check for trans_id overflow */
2454 if (journal
->j_trans_id
== 0)
2455 journal
->j_trans_id
= 10;
2456 journal
->j_last_flush_trans_id
=
2457 le32_to_cpu(jh
->j_last_flush_trans_id
);
2458 journal
->j_mount_id
= le32_to_cpu(jh
->j_mount_id
) + 1;
2460 journal
->j_mount_id
= newest_mount_id
+ 1;
2462 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2463 "newest_mount_id to %lu", journal
->j_mount_id
);
2464 journal
->j_first_unflushed_offset
= journal
->j_start
;
2465 if (replay_count
> 0) {
2466 reiserfs_info(p_s_sb
,
2467 "replayed %d transactions in %lu seconds\n",
2468 replay_count
, get_seconds() - start
);
2470 if (!bdev_read_only(p_s_sb
->s_bdev
) &&
2471 _update_journal_header_block(p_s_sb
, journal
->j_start
,
2472 journal
->j_last_flush_trans_id
)) {
2473 /* replay failed, caller must call free_journal_ram and abort
2481 static struct reiserfs_journal_list
*alloc_journal_list(struct super_block
*s
)
2483 struct reiserfs_journal_list
*jl
;
2484 jl
= kzalloc(sizeof(struct reiserfs_journal_list
),
2485 GFP_NOFS
| __GFP_NOFAIL
);
2486 INIT_LIST_HEAD(&jl
->j_list
);
2487 INIT_LIST_HEAD(&jl
->j_working_list
);
2488 INIT_LIST_HEAD(&jl
->j_tail_bh_list
);
2489 INIT_LIST_HEAD(&jl
->j_bh_list
);
2490 sema_init(&jl
->j_commit_lock
, 1);
2491 SB_JOURNAL(s
)->j_num_lists
++;
2492 get_journal_list(jl
);
2496 static void journal_list_init(struct super_block
*p_s_sb
)
2498 SB_JOURNAL(p_s_sb
)->j_current_jl
= alloc_journal_list(p_s_sb
);
2501 static int release_journal_dev(struct super_block
*super
,
2502 struct reiserfs_journal
*journal
)
2508 if (journal
->j_dev_file
!= NULL
) {
2509 result
= filp_close(journal
->j_dev_file
, NULL
);
2510 journal
->j_dev_file
= NULL
;
2511 journal
->j_dev_bd
= NULL
;
2512 } else if (journal
->j_dev_bd
!= NULL
) {
2513 result
= blkdev_put(journal
->j_dev_bd
);
2514 journal
->j_dev_bd
= NULL
;
2518 reiserfs_warning(super
,
2519 "sh-457: release_journal_dev: Cannot release journal device: %i",
2525 static int journal_init_dev(struct super_block
*super
,
2526 struct reiserfs_journal
*journal
,
2527 const char *jdev_name
)
2531 int blkdev_mode
= FMODE_READ
| FMODE_WRITE
;
2532 char b
[BDEVNAME_SIZE
];
2536 journal
->j_dev_bd
= NULL
;
2537 journal
->j_dev_file
= NULL
;
2538 jdev
= SB_ONDISK_JOURNAL_DEVICE(super
) ?
2539 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super
)) : super
->s_dev
;
2541 if (bdev_read_only(super
->s_bdev
))
2542 blkdev_mode
= FMODE_READ
;
2544 /* there is no "jdev" option and journal is on separate device */
2545 if ((!jdev_name
|| !jdev_name
[0])) {
2546 journal
->j_dev_bd
= open_by_devnum(jdev
, blkdev_mode
);
2547 if (IS_ERR(journal
->j_dev_bd
)) {
2548 result
= PTR_ERR(journal
->j_dev_bd
);
2549 journal
->j_dev_bd
= NULL
;
2550 reiserfs_warning(super
, "sh-458: journal_init_dev: "
2551 "cannot init journal device '%s': %i",
2552 __bdevname(jdev
, b
), result
);
2554 } else if (jdev
!= super
->s_dev
)
2555 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2559 journal
->j_dev_file
= filp_open(jdev_name
, 0, 0);
2560 if (!IS_ERR(journal
->j_dev_file
)) {
2561 struct inode
*jdev_inode
= journal
->j_dev_file
->f_mapping
->host
;
2562 if (!S_ISBLK(jdev_inode
->i_mode
)) {
2563 reiserfs_warning(super
, "journal_init_dev: '%s' is "
2564 "not a block device", jdev_name
);
2566 release_journal_dev(super
, journal
);
2569 journal
->j_dev_bd
= I_BDEV(jdev_inode
);
2570 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2571 reiserfs_info(super
,
2572 "journal_init_dev: journal device: %s\n",
2573 bdevname(journal
->j_dev_bd
, b
));
2576 result
= PTR_ERR(journal
->j_dev_file
);
2577 journal
->j_dev_file
= NULL
;
2578 reiserfs_warning(super
,
2579 "journal_init_dev: Cannot open '%s': %i",
2586 ** must be called once on fs mount. calls journal_read for you
2588 int journal_init(struct super_block
*p_s_sb
, const char *j_dev_name
,
2589 int old_format
, unsigned int commit_max_age
)
2591 int num_cnodes
= SB_ONDISK_JOURNAL_SIZE(p_s_sb
) * 2;
2592 struct buffer_head
*bhjh
;
2593 struct reiserfs_super_block
*rs
;
2594 struct reiserfs_journal_header
*jh
;
2595 struct reiserfs_journal
*journal
;
2596 struct reiserfs_journal_list
*jl
;
2597 char b
[BDEVNAME_SIZE
];
2599 journal
= SB_JOURNAL(p_s_sb
) = vmalloc(sizeof(struct reiserfs_journal
));
2601 reiserfs_warning(p_s_sb
,
2602 "journal-1256: unable to get memory for journal structure");
2605 memset(journal
, 0, sizeof(struct reiserfs_journal
));
2606 INIT_LIST_HEAD(&journal
->j_bitmap_nodes
);
2607 INIT_LIST_HEAD(&journal
->j_prealloc_list
);
2608 INIT_LIST_HEAD(&journal
->j_working_list
);
2609 INIT_LIST_HEAD(&journal
->j_journal_list
);
2610 journal
->j_persistent_trans
= 0;
2611 if (reiserfs_allocate_list_bitmaps(p_s_sb
,
2612 journal
->j_list_bitmap
,
2613 SB_BMAP_NR(p_s_sb
)))
2614 goto free_and_return
;
2615 allocate_bitmap_nodes(p_s_sb
);
2617 /* reserved for journal area support */
2618 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) = (old_format
?
2619 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2620 / p_s_sb
->s_blocksize
+
2621 SB_BMAP_NR(p_s_sb
) +
2623 REISERFS_DISK_OFFSET_IN_BYTES
/
2624 p_s_sb
->s_blocksize
+ 2);
2626 /* Sanity check to see is the standard journal fitting withing first bitmap
2627 (actual for small blocksizes) */
2628 if (!SB_ONDISK_JOURNAL_DEVICE(p_s_sb
) &&
2629 (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) +
2630 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) > p_s_sb
->s_blocksize
* 8)) {
2631 reiserfs_warning(p_s_sb
,
2632 "journal-1393: journal does not fit for area "
2633 "addressed by first of bitmap blocks. It starts at "
2634 "%u and its size is %u. Block size %ld",
2635 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
),
2636 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2637 p_s_sb
->s_blocksize
);
2638 goto free_and_return
;
2641 if (journal_init_dev(p_s_sb
, journal
, j_dev_name
) != 0) {
2642 reiserfs_warning(p_s_sb
,
2643 "sh-462: unable to initialize jornal device");
2644 goto free_and_return
;
2647 rs
= SB_DISK_SUPER_BLOCK(p_s_sb
);
2649 /* read journal header */
2650 bhjh
= journal_bread(p_s_sb
,
2651 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2652 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2654 reiserfs_warning(p_s_sb
,
2655 "sh-459: unable to read journal header");
2656 goto free_and_return
;
2658 jh
= (struct reiserfs_journal_header
*)(bhjh
->b_data
);
2660 /* make sure that journal matches to the super block */
2661 if (is_reiserfs_jr(rs
)
2662 && (le32_to_cpu(jh
->jh_journal
.jp_journal_magic
) !=
2663 sb_jp_journal_magic(rs
))) {
2664 reiserfs_warning(p_s_sb
,
2665 "sh-460: journal header magic %x "
2666 "(device %s) does not match to magic found in super "
2667 "block %x", jh
->jh_journal
.jp_journal_magic
,
2668 bdevname(journal
->j_dev_bd
, b
),
2669 sb_jp_journal_magic(rs
));
2671 goto free_and_return
;
2674 journal
->j_trans_max
= le32_to_cpu(jh
->jh_journal
.jp_journal_trans_max
);
2675 journal
->j_max_batch
= le32_to_cpu(jh
->jh_journal
.jp_journal_max_batch
);
2676 journal
->j_max_commit_age
=
2677 le32_to_cpu(jh
->jh_journal
.jp_journal_max_commit_age
);
2678 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
2680 if (journal
->j_trans_max
) {
2681 /* make sure these parameters are available, assign it if they are not */
2682 __u32 initial
= journal
->j_trans_max
;
2685 if (p_s_sb
->s_blocksize
< 4096)
2686 ratio
= 4096 / p_s_sb
->s_blocksize
;
2688 if (SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / journal
->j_trans_max
<
2690 journal
->j_trans_max
=
2691 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / JOURNAL_MIN_RATIO
;
2692 if (journal
->j_trans_max
> JOURNAL_TRANS_MAX_DEFAULT
/ ratio
)
2693 journal
->j_trans_max
=
2694 JOURNAL_TRANS_MAX_DEFAULT
/ ratio
;
2695 if (journal
->j_trans_max
< JOURNAL_TRANS_MIN_DEFAULT
/ ratio
)
2696 journal
->j_trans_max
=
2697 JOURNAL_TRANS_MIN_DEFAULT
/ ratio
;
2699 if (journal
->j_trans_max
!= initial
)
2700 reiserfs_warning(p_s_sb
,
2701 "sh-461: journal_init: wrong transaction max size (%u). Changed to %u",
2702 initial
, journal
->j_trans_max
);
2704 journal
->j_max_batch
= journal
->j_trans_max
*
2705 JOURNAL_MAX_BATCH_DEFAULT
/ JOURNAL_TRANS_MAX_DEFAULT
;
2708 if (!journal
->j_trans_max
) {
2709 /*we have the file system was created by old version of mkreiserfs
2710 so this field contains zero value */
2711 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
;
2712 journal
->j_max_batch
= JOURNAL_MAX_BATCH_DEFAULT
;
2713 journal
->j_max_commit_age
= JOURNAL_MAX_COMMIT_AGE
;
2715 /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096
2716 trans max size is decreased proportionally */
2717 if (p_s_sb
->s_blocksize
< 4096) {
2718 journal
->j_trans_max
/= (4096 / p_s_sb
->s_blocksize
);
2719 journal
->j_max_batch
= (journal
->j_trans_max
) * 9 / 10;
2723 journal
->j_default_max_commit_age
= journal
->j_max_commit_age
;
2725 if (commit_max_age
!= 0) {
2726 journal
->j_max_commit_age
= commit_max_age
;
2727 journal
->j_max_trans_age
= commit_max_age
;
2730 reiserfs_info(p_s_sb
, "journal params: device %s, size %u, "
2731 "journal first block %u, max trans len %u, max batch %u, "
2732 "max commit age %u, max trans age %u\n",
2733 bdevname(journal
->j_dev_bd
, b
),
2734 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2735 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2736 journal
->j_trans_max
,
2737 journal
->j_max_batch
,
2738 journal
->j_max_commit_age
, journal
->j_max_trans_age
);
2742 journal
->j_list_bitmap_index
= 0;
2743 journal_list_init(p_s_sb
);
2745 memset(journal
->j_list_hash_table
, 0,
2746 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
2748 INIT_LIST_HEAD(&journal
->j_dirty_buffers
);
2749 spin_lock_init(&journal
->j_dirty_buffers_lock
);
2751 journal
->j_start
= 0;
2753 journal
->j_len_alloc
= 0;
2754 atomic_set(&(journal
->j_wcount
), 0);
2755 atomic_set(&(journal
->j_async_throttle
), 0);
2756 journal
->j_bcount
= 0;
2757 journal
->j_trans_start_time
= 0;
2758 journal
->j_last
= NULL
;
2759 journal
->j_first
= NULL
;
2760 init_waitqueue_head(&(journal
->j_join_wait
));
2761 sema_init(&journal
->j_lock
, 1);
2762 sema_init(&journal
->j_flush_sem
, 1);
2764 journal
->j_trans_id
= 10;
2765 journal
->j_mount_id
= 10;
2766 journal
->j_state
= 0;
2767 atomic_set(&(journal
->j_jlock
), 0);
2768 journal
->j_cnode_free_list
= allocate_cnodes(num_cnodes
);
2769 journal
->j_cnode_free_orig
= journal
->j_cnode_free_list
;
2770 journal
->j_cnode_free
= journal
->j_cnode_free_list
? num_cnodes
: 0;
2771 journal
->j_cnode_used
= 0;
2772 journal
->j_must_wait
= 0;
2774 if (journal
->j_cnode_free
== 0) {
2775 reiserfs_warning(p_s_sb
, "journal-2004: Journal cnode memory "
2776 "allocation failed (%ld bytes). Journal is "
2777 "too large for available memory. Usually "
2778 "this is due to a journal that is too large.",
2779 sizeof (struct reiserfs_journal_cnode
) * num_cnodes
);
2780 goto free_and_return
;
2783 init_journal_hash(p_s_sb
);
2784 jl
= journal
->j_current_jl
;
2785 jl
->j_list_bitmap
= get_list_bitmap(p_s_sb
, jl
);
2786 if (!jl
->j_list_bitmap
) {
2787 reiserfs_warning(p_s_sb
,
2788 "journal-2005, get_list_bitmap failed for journal list 0");
2789 goto free_and_return
;
2791 if (journal_read(p_s_sb
) < 0) {
2792 reiserfs_warning(p_s_sb
, "Replay Failure, unable to mount");
2793 goto free_and_return
;
2796 reiserfs_mounted_fs_count
++;
2797 if (reiserfs_mounted_fs_count
<= 1)
2798 commit_wq
= create_workqueue("reiserfs");
2800 INIT_WORK(&journal
->j_work
, flush_async_commits
, p_s_sb
);
2803 free_journal_ram(p_s_sb
);
2808 ** test for a polite end of the current transaction. Used by file_write, and should
2809 ** be used by delete to make sure they don't write more than can fit inside a single
2812 int journal_transaction_should_end(struct reiserfs_transaction_handle
*th
,
2815 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2816 time_t now
= get_seconds();
2817 /* cannot restart while nested */
2818 BUG_ON(!th
->t_trans_id
);
2819 if (th
->t_refcount
> 1)
2821 if (journal
->j_must_wait
> 0 ||
2822 (journal
->j_len_alloc
+ new_alloc
) >= journal
->j_max_batch
||
2823 atomic_read(&(journal
->j_jlock
)) ||
2824 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
||
2825 journal
->j_cnode_free
< (journal
->j_trans_max
* 3)) {
2828 /* protected by the BKL here */
2829 journal
->j_len_alloc
+= new_alloc
;
2830 th
->t_blocks_allocated
+= new_alloc
;
2834 /* this must be called inside a transaction, and requires the
2835 ** kernel_lock to be held
2837 void reiserfs_block_writes(struct reiserfs_transaction_handle
*th
)
2839 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2840 BUG_ON(!th
->t_trans_id
);
2841 journal
->j_must_wait
= 1;
2842 set_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2846 /* this must be called without a transaction started, and does not
2849 void reiserfs_allow_writes(struct super_block
*s
)
2851 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2852 clear_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2853 wake_up(&journal
->j_join_wait
);
2856 /* this must be called without a transaction started, and does not
2859 void reiserfs_wait_on_write_block(struct super_block
*s
)
2861 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2862 wait_event(journal
->j_join_wait
,
2863 !test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
));
2866 static void queue_log_writer(struct super_block
*s
)
2869 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2870 set_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
2873 * we don't want to use wait_event here because
2874 * we only want to wait once.
2876 init_waitqueue_entry(&wait
, current
);
2877 add_wait_queue(&journal
->j_join_wait
, &wait
);
2878 set_current_state(TASK_UNINTERRUPTIBLE
);
2879 if (test_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2881 current
->state
= TASK_RUNNING
;
2882 remove_wait_queue(&journal
->j_join_wait
, &wait
);
2885 static void wake_queued_writers(struct super_block
*s
)
2887 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2888 if (test_and_clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2889 wake_up(&journal
->j_join_wait
);
2892 static void let_transaction_grow(struct super_block
*sb
, unsigned long trans_id
)
2894 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2895 unsigned long bcount
= journal
->j_bcount
;
2897 schedule_timeout_uninterruptible(1);
2898 journal
->j_current_jl
->j_state
|= LIST_COMMIT_PENDING
;
2899 while ((atomic_read(&journal
->j_wcount
) > 0 ||
2900 atomic_read(&journal
->j_jlock
)) &&
2901 journal
->j_trans_id
== trans_id
) {
2902 queue_log_writer(sb
);
2904 if (journal
->j_trans_id
!= trans_id
)
2906 if (bcount
== journal
->j_bcount
)
2908 bcount
= journal
->j_bcount
;
2912 /* join == true if you must join an existing transaction.
2913 ** join == false if you can deal with waiting for others to finish
2915 ** this will block until the transaction is joinable. send the number of blocks you
2916 ** expect to use in nblocks.
2918 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
2919 struct super_block
*p_s_sb
, unsigned long nblocks
,
2922 time_t now
= get_seconds();
2924 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2925 struct reiserfs_transaction_handle myth
;
2926 int sched_count
= 0;
2929 reiserfs_check_lock_depth(p_s_sb
, "journal_begin");
2930 if (nblocks
> journal
->j_trans_max
)
2933 PROC_INFO_INC(p_s_sb
, journal
.journal_being
);
2934 /* set here for journal_join */
2936 th
->t_super
= p_s_sb
;
2939 lock_journal(p_s_sb
);
2940 if (join
!= JBEGIN_ABORT
&& reiserfs_is_journal_aborted(journal
)) {
2941 unlock_journal(p_s_sb
);
2942 retval
= journal
->j_errno
;
2945 journal
->j_bcount
++;
2947 if (test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) {
2948 unlock_journal(p_s_sb
);
2949 reiserfs_wait_on_write_block(p_s_sb
);
2950 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_writers
);
2953 now
= get_seconds();
2955 /* if there is no room in the journal OR
2956 ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning
2957 ** we don't sleep if there aren't other writers
2960 if ((!join
&& journal
->j_must_wait
> 0) ||
2962 && (journal
->j_len_alloc
+ nblocks
+ 2) >= journal
->j_max_batch
)
2963 || (!join
&& atomic_read(&journal
->j_wcount
) > 0
2964 && journal
->j_trans_start_time
> 0
2965 && (now
- journal
->j_trans_start_time
) >
2966 journal
->j_max_trans_age
) || (!join
2967 && atomic_read(&journal
->j_jlock
))
2968 || (!join
&& journal
->j_cnode_free
< (journal
->j_trans_max
* 3))) {
2970 old_trans_id
= journal
->j_trans_id
;
2971 unlock_journal(p_s_sb
); /* allow others to finish this transaction */
2973 if (!join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >=
2974 journal
->j_max_batch
&&
2975 ((journal
->j_len
+ nblocks
+ 2) * 100) <
2976 (journal
->j_len_alloc
* 75)) {
2977 if (atomic_read(&journal
->j_wcount
) > 10) {
2979 queue_log_writer(p_s_sb
);
2983 /* don't mess with joining the transaction if all we have to do is
2984 * wait for someone else to do a commit
2986 if (atomic_read(&journal
->j_jlock
)) {
2987 while (journal
->j_trans_id
== old_trans_id
&&
2988 atomic_read(&journal
->j_jlock
)) {
2989 queue_log_writer(p_s_sb
);
2993 retval
= journal_join(&myth
, p_s_sb
, 1);
2997 /* someone might have ended the transaction while we joined */
2998 if (old_trans_id
!= journal
->j_trans_id
) {
2999 retval
= do_journal_end(&myth
, p_s_sb
, 1, 0);
3001 retval
= do_journal_end(&myth
, p_s_sb
, 1, COMMIT_NOW
);
3007 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_wcount
);
3010 /* we are the first writer, set trans_id */
3011 if (journal
->j_trans_start_time
== 0) {
3012 journal
->j_trans_start_time
= get_seconds();
3014 atomic_inc(&(journal
->j_wcount
));
3015 journal
->j_len_alloc
+= nblocks
;
3016 th
->t_blocks_logged
= 0;
3017 th
->t_blocks_allocated
= nblocks
;
3018 th
->t_trans_id
= journal
->j_trans_id
;
3019 unlock_journal(p_s_sb
);
3020 INIT_LIST_HEAD(&th
->t_list
);
3025 memset(th
, 0, sizeof(*th
));
3026 /* Re-set th->t_super, so we can properly keep track of how many
3027 * persistent transactions there are. We need to do this so if this
3028 * call is part of a failed restart_transaction, we can free it later */
3029 th
->t_super
= p_s_sb
;
3033 struct reiserfs_transaction_handle
*reiserfs_persistent_transaction(struct
3039 struct reiserfs_transaction_handle
*th
;
3041 /* if we're nesting into an existing transaction. It will be
3042 ** persistent on its own
3044 if (reiserfs_transaction_running(s
)) {
3045 th
= current
->journal_info
;
3047 if (th
->t_refcount
< 2) {
3052 th
= kmalloc(sizeof(struct reiserfs_transaction_handle
), GFP_NOFS
);
3055 ret
= journal_begin(th
, s
, nblocks
);
3061 SB_JOURNAL(s
)->j_persistent_trans
++;
3065 int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle
*th
)
3067 struct super_block
*s
= th
->t_super
;
3070 ret
= journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
3073 if (th
->t_refcount
== 0) {
3074 SB_JOURNAL(s
)->j_persistent_trans
--;
3080 static int journal_join(struct reiserfs_transaction_handle
*th
,
3081 struct super_block
*p_s_sb
, unsigned long nblocks
)
3083 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3085 /* this keeps do_journal_end from NULLing out the current->journal_info
3088 th
->t_handle_save
= cur_th
;
3089 if (cur_th
&& cur_th
->t_refcount
> 1) {
3092 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_JOIN
);
3095 int journal_join_abort(struct reiserfs_transaction_handle
*th
,
3096 struct super_block
*p_s_sb
, unsigned long nblocks
)
3098 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3100 /* this keeps do_journal_end from NULLing out the current->journal_info
3103 th
->t_handle_save
= cur_th
;
3104 if (cur_th
&& cur_th
->t_refcount
> 1) {
3107 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_ABORT
);
3110 int journal_begin(struct reiserfs_transaction_handle
*th
,
3111 struct super_block
*p_s_sb
, unsigned long nblocks
)
3113 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3116 th
->t_handle_save
= NULL
;
3118 /* we are nesting into the current transaction */
3119 if (cur_th
->t_super
== p_s_sb
) {
3120 BUG_ON(!cur_th
->t_refcount
);
3121 cur_th
->t_refcount
++;
3122 memcpy(th
, cur_th
, sizeof(*th
));
3123 if (th
->t_refcount
<= 1)
3124 reiserfs_warning(p_s_sb
,
3125 "BAD: refcount <= 1, but journal_info != 0");
3128 /* we've ended up with a handle from a different filesystem.
3129 ** save it and restore on journal_end. This should never
3132 reiserfs_warning(p_s_sb
,
3133 "clm-2100: nesting info a different FS");
3134 th
->t_handle_save
= current
->journal_info
;
3135 current
->journal_info
= th
;
3138 current
->journal_info
= th
;
3140 ret
= do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_REG
);
3141 if (current
->journal_info
!= th
)
3144 /* I guess this boils down to being the reciprocal of clm-2100 above.
3145 * If do_journal_begin_r fails, we need to put it back, since journal_end
3146 * won't be called to do it. */
3148 current
->journal_info
= th
->t_handle_save
;
3150 BUG_ON(!th
->t_refcount
);
3156 ** puts bh into the current transaction. If it was already there, reorders removes the
3157 ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
3159 ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the
3160 ** transaction is committed.
3162 ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
3164 int journal_mark_dirty(struct reiserfs_transaction_handle
*th
,
3165 struct super_block
*p_s_sb
, struct buffer_head
*bh
)
3167 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3168 struct reiserfs_journal_cnode
*cn
= NULL
;
3169 int count_already_incd
= 0;
3171 BUG_ON(!th
->t_trans_id
);
3173 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty
);
3174 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3175 reiserfs_panic(th
->t_super
,
3176 "journal-1577: handle trans id %ld != current trans id %ld\n",
3177 th
->t_trans_id
, journal
->j_trans_id
);
3182 prepared
= test_clear_buffer_journal_prepared(bh
);
3183 clear_buffer_journal_restore_dirty(bh
);
3184 /* already in this transaction, we are done */
3185 if (buffer_journaled(bh
)) {
3186 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_already
);
3190 /* this must be turned into a panic instead of a warning. We can't allow
3191 ** a dirty or journal_dirty or locked buffer to be logged, as some changes
3192 ** could get to disk too early. NOT GOOD.
3194 if (!prepared
|| buffer_dirty(bh
)) {
3195 reiserfs_warning(p_s_sb
, "journal-1777: buffer %llu bad state "
3196 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3197 (unsigned long long)bh
->b_blocknr
,
3198 prepared
? ' ' : '!',
3199 buffer_locked(bh
) ? ' ' : '!',
3200 buffer_dirty(bh
) ? ' ' : '!',
3201 buffer_journal_dirty(bh
) ? ' ' : '!');
3204 if (atomic_read(&(journal
->j_wcount
)) <= 0) {
3205 reiserfs_warning(p_s_sb
,
3206 "journal-1409: journal_mark_dirty returning because j_wcount was %d",
3207 atomic_read(&(journal
->j_wcount
)));
3210 /* this error means I've screwed up, and we've overflowed the transaction.
3211 ** Nothing can be done here, except make the FS readonly or panic.
3213 if (journal
->j_len
>= journal
->j_trans_max
) {
3214 reiserfs_panic(th
->t_super
,
3215 "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n",
3219 if (buffer_journal_dirty(bh
)) {
3220 count_already_incd
= 1;
3221 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_notjournal
);
3222 clear_buffer_journal_dirty(bh
);
3225 if (journal
->j_len
> journal
->j_len_alloc
) {
3226 journal
->j_len_alloc
= journal
->j_len
+ JOURNAL_PER_BALANCE_CNT
;
3229 set_buffer_journaled(bh
);
3231 /* now put this guy on the end */
3233 cn
= get_cnode(p_s_sb
);
3235 reiserfs_panic(p_s_sb
, "get_cnode failed!\n");
3238 if (th
->t_blocks_logged
== th
->t_blocks_allocated
) {
3239 th
->t_blocks_allocated
+= JOURNAL_PER_BALANCE_CNT
;
3240 journal
->j_len_alloc
+= JOURNAL_PER_BALANCE_CNT
;
3242 th
->t_blocks_logged
++;
3246 cn
->blocknr
= bh
->b_blocknr
;
3249 insert_journal_hash(journal
->j_hash_table
, cn
);
3250 if (!count_already_incd
) {
3255 cn
->prev
= journal
->j_last
;
3257 if (journal
->j_last
) {
3258 journal
->j_last
->next
= cn
;
3259 journal
->j_last
= cn
;
3261 journal
->j_first
= cn
;
3262 journal
->j_last
= cn
;
3267 int journal_end(struct reiserfs_transaction_handle
*th
,
3268 struct super_block
*p_s_sb
, unsigned long nblocks
)
3270 if (!current
->journal_info
&& th
->t_refcount
> 1)
3271 reiserfs_warning(p_s_sb
, "REISER-NESTING: th NULL, refcount %d",
3274 if (!th
->t_trans_id
) {
3280 if (th
->t_refcount
> 0) {
3281 struct reiserfs_transaction_handle
*cur_th
=
3282 current
->journal_info
;
3284 /* we aren't allowed to close a nested transaction on a different
3285 ** filesystem from the one in the task struct
3287 if (cur_th
->t_super
!= th
->t_super
)
3291 memcpy(current
->journal_info
, th
, sizeof(*th
));
3296 return do_journal_end(th
, p_s_sb
, nblocks
, 0);
3300 /* removes from the current transaction, relsing and descrementing any counters.
3301 ** also files the removed buffer directly onto the clean list
3303 ** called by journal_mark_freed when a block has been deleted
3305 ** returns 1 if it cleaned and relsed the buffer. 0 otherwise
3307 static int remove_from_transaction(struct super_block
*p_s_sb
,
3308 b_blocknr_t blocknr
, int already_cleaned
)
3310 struct buffer_head
*bh
;
3311 struct reiserfs_journal_cnode
*cn
;
3312 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3315 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3316 if (!cn
|| !cn
->bh
) {
3321 cn
->prev
->next
= cn
->next
;
3324 cn
->next
->prev
= cn
->prev
;
3326 if (cn
== journal
->j_first
) {
3327 journal
->j_first
= cn
->next
;
3329 if (cn
== journal
->j_last
) {
3330 journal
->j_last
= cn
->prev
;
3333 remove_journal_hash(p_s_sb
, journal
->j_hash_table
, NULL
,
3335 clear_buffer_journaled(bh
); /* don't log this one */
3337 if (!already_cleaned
) {
3338 clear_buffer_journal_dirty(bh
);
3339 clear_buffer_dirty(bh
);
3340 clear_buffer_journal_test(bh
);
3342 if (atomic_read(&(bh
->b_count
)) < 0) {
3343 reiserfs_warning(p_s_sb
,
3344 "journal-1752: remove from trans, b_count < 0");
3349 journal
->j_len_alloc
--;
3350 free_cnode(p_s_sb
, cn
);
3355 ** for any cnode in a journal list, it can only be dirtied of all the
3356 ** transactions that include it are commited to disk.
3357 ** this checks through each transaction, and returns 1 if you are allowed to dirty,
3358 ** and 0 if you aren't
3360 ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
3361 ** blocks for a given transaction on disk
3364 static int can_dirty(struct reiserfs_journal_cnode
*cn
)
3366 struct super_block
*sb
= cn
->sb
;
3367 b_blocknr_t blocknr
= cn
->blocknr
;
3368 struct reiserfs_journal_cnode
*cur
= cn
->hprev
;
3371 /* first test hprev. These are all newer than cn, so any node here
3372 ** with the same block number and dev means this node can't be sent
3373 ** to disk right now.
3375 while (cur
&& can_dirty
) {
3376 if (cur
->jlist
&& cur
->bh
&& cur
->blocknr
&& cur
->sb
== sb
&&
3377 cur
->blocknr
== blocknr
) {
3382 /* then test hnext. These are all older than cn. As long as they
3383 ** are committed to the log, it is safe to write cn to disk
3386 while (cur
&& can_dirty
) {
3387 if (cur
->jlist
&& cur
->jlist
->j_len
> 0 &&
3388 atomic_read(&(cur
->jlist
->j_commit_left
)) > 0 && cur
->bh
&&
3389 cur
->blocknr
&& cur
->sb
== sb
&& cur
->blocknr
== blocknr
) {
3397 /* syncs the commit blocks, but does not force the real buffers to disk
3398 ** will wait until the current transaction is done/commited before returning
3400 int journal_end_sync(struct reiserfs_transaction_handle
*th
,
3401 struct super_block
*p_s_sb
, unsigned long nblocks
)
3403 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3405 BUG_ON(!th
->t_trans_id
);
3406 /* you can sync while nested, very, very bad */
3407 if (th
->t_refcount
> 1) {
3410 if (journal
->j_len
== 0) {
3411 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3413 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3415 return do_journal_end(th
, p_s_sb
, nblocks
, COMMIT_NOW
| WAIT
);
3419 ** writeback the pending async commits to disk
3421 static void flush_async_commits(void *p
)
3423 struct super_block
*p_s_sb
= p
;
3424 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3425 struct reiserfs_journal_list
*jl
;
3426 struct list_head
*entry
;
3429 if (!list_empty(&journal
->j_journal_list
)) {
3430 /* last entry is the youngest, commit it and you get everything */
3431 entry
= journal
->j_journal_list
.prev
;
3432 jl
= JOURNAL_LIST_ENTRY(entry
);
3433 flush_commit_list(p_s_sb
, jl
, 1);
3437 * this is a little racey, but there's no harm in missing
3438 * the filemap_fdata_write
3440 if (!atomic_read(&journal
->j_async_throttle
)
3441 && !reiserfs_is_journal_aborted(journal
)) {
3442 atomic_inc(&journal
->j_async_throttle
);
3443 filemap_fdatawrite(p_s_sb
->s_bdev
->bd_inode
->i_mapping
);
3444 atomic_dec(&journal
->j_async_throttle
);
3449 ** flushes any old transactions to disk
3450 ** ends the current transaction if it is too old
3452 int reiserfs_flush_old_commits(struct super_block
*p_s_sb
)
3455 struct reiserfs_transaction_handle th
;
3456 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3458 now
= get_seconds();
3459 /* safety check so we don't flush while we are replaying the log during
3462 if (list_empty(&journal
->j_journal_list
)) {
3466 /* check the current transaction. If there are no writers, and it is
3467 * too old, finish it, and force the commit blocks to disk
3469 if (atomic_read(&journal
->j_wcount
) <= 0 &&
3470 journal
->j_trans_start_time
> 0 &&
3471 journal
->j_len
> 0 &&
3472 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3473 if (!journal_join(&th
, p_s_sb
, 1)) {
3474 reiserfs_prepare_for_journal(p_s_sb
,
3475 SB_BUFFER_WITH_SB(p_s_sb
),
3477 journal_mark_dirty(&th
, p_s_sb
,
3478 SB_BUFFER_WITH_SB(p_s_sb
));
3480 /* we're only being called from kreiserfsd, it makes no sense to do
3481 ** an async commit so that kreiserfsd can do it later
3483 do_journal_end(&th
, p_s_sb
, 1, COMMIT_NOW
| WAIT
);
3486 return p_s_sb
->s_dirt
;
3490 ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
3492 ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all
3493 ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just
3494 ** flushes the commit list and returns 0.
3496 ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait.
3498 ** Note, we can't allow the journal_end to proceed while there are still writers in the log.
3500 static int check_journal_end(struct reiserfs_transaction_handle
*th
,
3501 struct super_block
*p_s_sb
, unsigned long nblocks
,
3506 int flush
= flags
& FLUSH_ALL
;
3507 int commit_now
= flags
& COMMIT_NOW
;
3508 int wait_on_commit
= flags
& WAIT
;
3509 struct reiserfs_journal_list
*jl
;
3510 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3512 BUG_ON(!th
->t_trans_id
);
3514 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3515 reiserfs_panic(th
->t_super
,
3516 "journal-1577: handle trans id %ld != current trans id %ld\n",
3517 th
->t_trans_id
, journal
->j_trans_id
);
3520 journal
->j_len_alloc
-= (th
->t_blocks_allocated
- th
->t_blocks_logged
);
3521 if (atomic_read(&(journal
->j_wcount
)) > 0) { /* <= 0 is allowed. unmounting might not call begin */
3522 atomic_dec(&(journal
->j_wcount
));
3525 /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released
3526 ** will be dealt with by next transaction that actually writes something, but should be taken
3527 ** care of in this trans
3529 if (journal
->j_len
== 0) {
3532 /* if wcount > 0, and we are called to with flush or commit_now,
3533 ** we wait on j_join_wait. We will wake up when the last writer has
3534 ** finished the transaction, and started it on its way to the disk.
3535 ** Then, we flush the commit or journal list, and just return 0
3536 ** because the rest of journal end was already done for this transaction.
3538 if (atomic_read(&(journal
->j_wcount
)) > 0) {
3539 if (flush
|| commit_now
) {
3542 jl
= journal
->j_current_jl
;
3543 trans_id
= jl
->j_trans_id
;
3545 jl
->j_state
|= LIST_COMMIT_PENDING
;
3546 atomic_set(&(journal
->j_jlock
), 1);
3548 journal
->j_next_full_flush
= 1;
3550 unlock_journal(p_s_sb
);
3552 /* sleep while the current transaction is still j_jlocked */
3553 while (journal
->j_trans_id
== trans_id
) {
3554 if (atomic_read(&journal
->j_jlock
)) {
3555 queue_log_writer(p_s_sb
);
3557 lock_journal(p_s_sb
);
3558 if (journal
->j_trans_id
== trans_id
) {
3559 atomic_set(&(journal
->j_jlock
),
3562 unlock_journal(p_s_sb
);
3565 if (journal
->j_trans_id
== trans_id
) {
3569 && journal_list_still_alive(p_s_sb
, trans_id
)
3570 && wait_on_commit
) {
3571 flush_commit_list(p_s_sb
, jl
, 1);
3575 unlock_journal(p_s_sb
);
3579 /* deal with old transactions where we are the last writers */
3580 now
= get_seconds();
3581 if ((now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3583 journal
->j_next_async_flush
= 1;
3585 /* don't batch when someone is waiting on j_join_wait */
3586 /* don't batch when syncing the commit or flushing the whole trans */
3587 if (!(journal
->j_must_wait
> 0) && !(atomic_read(&(journal
->j_jlock
)))
3588 && !flush
&& !commit_now
&& (journal
->j_len
< journal
->j_max_batch
)
3589 && journal
->j_len_alloc
< journal
->j_max_batch
3590 && journal
->j_cnode_free
> (journal
->j_trans_max
* 3)) {
3591 journal
->j_bcount
++;
3592 unlock_journal(p_s_sb
);
3596 if (journal
->j_start
> SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
3597 reiserfs_panic(p_s_sb
,
3598 "journal-003: journal_end: j_start (%ld) is too high\n",
3605 ** Does all the work that makes deleting blocks safe.
3606 ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
3609 ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes
3610 ** before this transaction has finished.
3612 ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with
3613 ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash,
3614 ** the block can't be reallocated yet.
3616 ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
3618 int journal_mark_freed(struct reiserfs_transaction_handle
*th
,
3619 struct super_block
*p_s_sb
, b_blocknr_t blocknr
)
3621 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3622 struct reiserfs_journal_cnode
*cn
= NULL
;
3623 struct buffer_head
*bh
= NULL
;
3624 struct reiserfs_list_bitmap
*jb
= NULL
;
3626 BUG_ON(!th
->t_trans_id
);
3628 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3633 /* if it is journal new, we just remove it from this transaction */
3634 if (bh
&& buffer_journal_new(bh
)) {
3635 clear_buffer_journal_new(bh
);
3636 clear_prepared_bits(bh
);
3637 reiserfs_clean_and_file_buffer(bh
);
3638 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3640 /* set the bit for this block in the journal bitmap for this transaction */
3641 jb
= journal
->j_current_jl
->j_list_bitmap
;
3643 reiserfs_panic(p_s_sb
,
3644 "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n");
3646 set_bit_in_list_bitmap(p_s_sb
, blocknr
, jb
);
3648 /* Note, the entire while loop is not allowed to schedule. */
3651 clear_prepared_bits(bh
);
3652 reiserfs_clean_and_file_buffer(bh
);
3654 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3656 /* find all older transactions with this block, make sure they don't try to write it out */
3657 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
,
3660 if (p_s_sb
== cn
->sb
&& blocknr
== cn
->blocknr
) {
3661 set_bit(BLOCK_FREED
, &cn
->state
);
3664 /* remove_from_transaction will brelse the buffer if it was
3665 ** in the current trans
3667 clear_buffer_journal_dirty(cn
->
3669 clear_buffer_dirty(cn
->bh
);
3670 clear_buffer_journal_test(cn
->
3675 (&(cn
->bh
->b_count
)) < 0) {
3676 reiserfs_warning(p_s_sb
,
3677 "journal-2138: cn->bh->b_count < 0");
3680 if (cn
->jlist
) { /* since we are clearing the bh, we MUST dec nonzerolen */
3693 put_bh(bh
); /* get_hash grabs the buffer */
3694 if (atomic_read(&(bh
->b_count
)) < 0) {
3695 reiserfs_warning(p_s_sb
,
3696 "journal-2165: bh->b_count < 0");
3702 void reiserfs_update_inode_transaction(struct inode
*inode
)
3704 struct reiserfs_journal
*journal
= SB_JOURNAL(inode
->i_sb
);
3705 REISERFS_I(inode
)->i_jl
= journal
->j_current_jl
;
3706 REISERFS_I(inode
)->i_trans_id
= journal
->j_trans_id
;
3710 * returns -1 on error, 0 if no commits/barriers were done and 1
3711 * if a transaction was actually committed and the barrier was done
3713 static int __commit_trans_jl(struct inode
*inode
, unsigned long id
,
3714 struct reiserfs_journal_list
*jl
)
3716 struct reiserfs_transaction_handle th
;
3717 struct super_block
*sb
= inode
->i_sb
;
3718 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3721 /* is it from the current transaction, or from an unknown transaction? */
3722 if (id
== journal
->j_trans_id
) {
3723 jl
= journal
->j_current_jl
;
3724 /* try to let other writers come in and grow this transaction */
3725 let_transaction_grow(sb
, id
);
3726 if (journal
->j_trans_id
!= id
) {
3727 goto flush_commit_only
;
3730 ret
= journal_begin(&th
, sb
, 1);
3734 /* someone might have ended this transaction while we joined */
3735 if (journal
->j_trans_id
!= id
) {
3736 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
3738 journal_mark_dirty(&th
, sb
, SB_BUFFER_WITH_SB(sb
));
3739 ret
= journal_end(&th
, sb
, 1);
3740 goto flush_commit_only
;
3743 ret
= journal_end_sync(&th
, sb
, 1);
3748 /* this gets tricky, we have to make sure the journal list in
3749 * the inode still exists. We know the list is still around
3750 * if we've got a larger transaction id than the oldest list
3753 if (journal_list_still_alive(inode
->i_sb
, id
)) {
3755 * we only set ret to 1 when we know for sure
3756 * the barrier hasn't been started yet on the commit
3759 if (atomic_read(&jl
->j_commit_left
) > 1)
3761 flush_commit_list(sb
, jl
, 1);
3762 if (journal
->j_errno
)
3763 ret
= journal
->j_errno
;
3766 /* otherwise the list is gone, and long since committed */
3770 int reiserfs_commit_for_inode(struct inode
*inode
)
3772 unsigned long id
= REISERFS_I(inode
)->i_trans_id
;
3773 struct reiserfs_journal_list
*jl
= REISERFS_I(inode
)->i_jl
;
3775 /* for the whole inode, assume unset id means it was
3776 * changed in the current transaction. More conservative
3779 reiserfs_update_inode_transaction(inode
);
3780 id
= REISERFS_I(inode
)->i_trans_id
;
3781 /* jl will be updated in __commit_trans_jl */
3784 return __commit_trans_jl(inode
, id
, jl
);
3787 void reiserfs_restore_prepared_buffer(struct super_block
*p_s_sb
,
3788 struct buffer_head
*bh
)
3790 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3791 PROC_INFO_INC(p_s_sb
, journal
.restore_prepared
);
3795 if (test_clear_buffer_journal_restore_dirty(bh
) &&
3796 buffer_journal_dirty(bh
)) {
3797 struct reiserfs_journal_cnode
*cn
;
3798 cn
= get_journal_hash_dev(p_s_sb
,
3799 journal
->j_list_hash_table
,
3801 if (cn
&& can_dirty(cn
)) {
3802 set_buffer_journal_test(bh
);
3803 mark_buffer_dirty(bh
);
3806 clear_buffer_journal_prepared(bh
);
3809 extern struct tree_balance
*cur_tb
;
3811 ** before we can change a metadata block, we have to make sure it won't
3812 ** be written to disk while we are altering it. So, we must:
3817 int reiserfs_prepare_for_journal(struct super_block
*p_s_sb
,
3818 struct buffer_head
*bh
, int wait
)
3820 PROC_INFO_INC(p_s_sb
, journal
.prepare
);
3822 if (test_set_buffer_locked(bh
)) {
3827 set_buffer_journal_prepared(bh
);
3828 if (test_clear_buffer_dirty(bh
) && buffer_journal_dirty(bh
)) {
3829 clear_buffer_journal_test(bh
);
3830 set_buffer_journal_restore_dirty(bh
);
3836 static void flush_old_journal_lists(struct super_block
*s
)
3838 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
3839 struct reiserfs_journal_list
*jl
;
3840 struct list_head
*entry
;
3841 time_t now
= get_seconds();
3843 while (!list_empty(&journal
->j_journal_list
)) {
3844 entry
= journal
->j_journal_list
.next
;
3845 jl
= JOURNAL_LIST_ENTRY(entry
);
3846 /* this check should always be run, to send old lists to disk */
3847 if (jl
->j_timestamp
< (now
- (JOURNAL_MAX_TRANS_AGE
* 4))) {
3848 flush_used_journal_lists(s
, jl
);
3856 ** long and ugly. If flush, will not return until all commit
3857 ** blocks and all real buffers in the trans are on disk.
3858 ** If no_async, won't return until all commit blocks are on disk.
3860 ** keep reading, there are comments as you go along
3862 ** If the journal is aborted, we just clean up. Things like flushing
3863 ** journal lists, etc just won't happen.
3865 static int do_journal_end(struct reiserfs_transaction_handle
*th
,
3866 struct super_block
*p_s_sb
, unsigned long nblocks
,
3869 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3870 struct reiserfs_journal_cnode
*cn
, *next
, *jl_cn
;
3871 struct reiserfs_journal_cnode
*last_cn
= NULL
;
3872 struct reiserfs_journal_desc
*desc
;
3873 struct reiserfs_journal_commit
*commit
;
3874 struct buffer_head
*c_bh
; /* commit bh */
3875 struct buffer_head
*d_bh
; /* desc bh */
3876 int cur_write_start
= 0; /* start index of current log write */
3881 struct reiserfs_journal_list
*jl
, *temp_jl
;
3882 struct list_head
*entry
, *safe
;
3883 unsigned long jindex
;
3884 unsigned long commit_trans_id
;
3887 BUG_ON(th
->t_refcount
> 1);
3888 BUG_ON(!th
->t_trans_id
);
3890 /* protect flush_older_commits from doing mistakes if the
3891 transaction ID counter gets overflowed. */
3892 if (th
->t_trans_id
== ~0UL)
3893 flags
|= FLUSH_ALL
| COMMIT_NOW
| WAIT
;
3894 flush
= flags
& FLUSH_ALL
;
3895 wait_on_commit
= flags
& WAIT
;
3898 current
->journal_info
= th
->t_handle_save
;
3899 reiserfs_check_lock_depth(p_s_sb
, "journal end");
3900 if (journal
->j_len
== 0) {
3901 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3903 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3906 lock_journal(p_s_sb
);
3907 if (journal
->j_next_full_flush
) {
3911 if (journal
->j_next_async_flush
) {
3912 flags
|= COMMIT_NOW
| WAIT
;
3916 /* check_journal_end locks the journal, and unlocks if it does not return 1
3917 ** it tells us if we should continue with the journal_end, or just return
3919 if (!check_journal_end(th
, p_s_sb
, nblocks
, flags
)) {
3921 wake_queued_writers(p_s_sb
);
3922 reiserfs_async_progress_wait(p_s_sb
);
3926 /* check_journal_end might set these, check again */
3927 if (journal
->j_next_full_flush
) {
3932 ** j must wait means we have to flush the log blocks, and the real blocks for
3935 if (journal
->j_must_wait
> 0) {
3938 #ifdef REISERFS_PREALLOCATE
3939 /* quota ops might need to nest, setup the journal_info pointer for them
3940 * and raise the refcount so that it is > 0. */
3941 current
->journal_info
= th
;
3943 reiserfs_discard_all_prealloc(th
); /* it should not involve new blocks into
3944 * the transaction */
3946 current
->journal_info
= th
->t_handle_save
;
3949 /* setup description block */
3951 journal_getblk(p_s_sb
,
3952 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3954 set_buffer_uptodate(d_bh
);
3955 desc
= (struct reiserfs_journal_desc
*)(d_bh
)->b_data
;
3956 memset(d_bh
->b_data
, 0, d_bh
->b_size
);
3957 memcpy(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8);
3958 set_desc_trans_id(desc
, journal
->j_trans_id
);
3960 /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */
3961 c_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3962 ((journal
->j_start
+ journal
->j_len
+
3963 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
3964 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
3965 memset(c_bh
->b_data
, 0, c_bh
->b_size
);
3966 set_commit_trans_id(commit
, journal
->j_trans_id
);
3967 set_buffer_uptodate(c_bh
);
3969 /* init this journal list */
3970 jl
= journal
->j_current_jl
;
3972 /* we lock the commit before doing anything because
3973 * we want to make sure nobody tries to run flush_commit_list until
3974 * the new transaction is fully setup, and we've already flushed the
3977 down(&jl
->j_commit_lock
);
3979 /* save the transaction id in case we need to commit it later */
3980 commit_trans_id
= jl
->j_trans_id
;
3982 atomic_set(&jl
->j_older_commits_done
, 0);
3983 jl
->j_trans_id
= journal
->j_trans_id
;
3984 jl
->j_timestamp
= journal
->j_trans_start_time
;
3985 jl
->j_commit_bh
= c_bh
;
3986 jl
->j_start
= journal
->j_start
;
3987 jl
->j_len
= journal
->j_len
;
3988 atomic_set(&jl
->j_nonzerolen
, journal
->j_len
);
3989 atomic_set(&jl
->j_commit_left
, journal
->j_len
+ 2);
3990 jl
->j_realblock
= NULL
;
3992 /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
3993 ** for each real block, add it to the journal list hash,
3994 ** copy into real block index array in the commit or desc block
3996 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
3997 for (i
= 0, cn
= journal
->j_first
; cn
; cn
= cn
->next
, i
++) {
3998 if (buffer_journaled(cn
->bh
)) {
3999 jl_cn
= get_cnode(p_s_sb
);
4001 reiserfs_panic(p_s_sb
,
4002 "journal-1676, get_cnode returned NULL\n");
4005 jl
->j_realblock
= jl_cn
;
4007 jl_cn
->prev
= last_cn
;
4010 last_cn
->next
= jl_cn
;
4013 /* make sure the block we are trying to log is not a block
4014 of journal or reserved area */
4016 if (is_block_in_log_or_reserved_area
4017 (p_s_sb
, cn
->bh
->b_blocknr
)) {
4018 reiserfs_panic(p_s_sb
,
4019 "journal-2332: Trying to log block %lu, which is a log block\n",
4022 jl_cn
->blocknr
= cn
->bh
->b_blocknr
;
4027 insert_journal_hash(journal
->j_list_hash_table
, jl_cn
);
4028 if (i
< trans_half
) {
4029 desc
->j_realblock
[i
] =
4030 cpu_to_le32(cn
->bh
->b_blocknr
);
4032 commit
->j_realblock
[i
- trans_half
] =
4033 cpu_to_le32(cn
->bh
->b_blocknr
);
4039 set_desc_trans_len(desc
, journal
->j_len
);
4040 set_desc_mount_id(desc
, journal
->j_mount_id
);
4041 set_desc_trans_id(desc
, journal
->j_trans_id
);
4042 set_commit_trans_len(commit
, journal
->j_len
);
4044 /* special check in case all buffers in the journal were marked for not logging */
4045 if (journal
->j_len
== 0) {
4049 /* we're about to dirty all the log blocks, mark the description block
4050 * dirty now too. Don't mark the commit block dirty until all the
4051 * others are on disk
4053 mark_buffer_dirty(d_bh
);
4055 /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
4056 cur_write_start
= journal
->j_start
;
4057 cn
= journal
->j_first
;
4058 jindex
= 1; /* start at one so we don't get the desc again */
4060 clear_buffer_journal_new(cn
->bh
);
4061 /* copy all the real blocks into log area. dirty log blocks */
4062 if (buffer_journaled(cn
->bh
)) {
4063 struct buffer_head
*tmp_bh
;
4067 journal_getblk(p_s_sb
,
4068 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
4071 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
4072 set_buffer_uptodate(tmp_bh
);
4073 page
= cn
->bh
->b_page
;
4075 memcpy(tmp_bh
->b_data
,
4076 addr
+ offset_in_page(cn
->bh
->b_data
),
4079 mark_buffer_dirty(tmp_bh
);
4081 set_buffer_journal_dirty(cn
->bh
);
4082 clear_buffer_journaled(cn
->bh
);
4084 /* JDirty cleared sometime during transaction. don't log this one */
4085 reiserfs_warning(p_s_sb
,
4086 "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!");
4090 free_cnode(p_s_sb
, cn
);
4095 /* we are done with both the c_bh and d_bh, but
4096 ** c_bh must be written after all other commit blocks,
4097 ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
4100 journal
->j_current_jl
= alloc_journal_list(p_s_sb
);
4102 /* now it is safe to insert this transaction on the main list */
4103 list_add_tail(&jl
->j_list
, &journal
->j_journal_list
);
4104 list_add_tail(&jl
->j_working_list
, &journal
->j_working_list
);
4105 journal
->j_num_work_lists
++;
4107 /* reset journal values for the next transaction */
4108 old_start
= journal
->j_start
;
4110 (journal
->j_start
+ journal
->j_len
+
4111 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
);
4112 atomic_set(&(journal
->j_wcount
), 0);
4113 journal
->j_bcount
= 0;
4114 journal
->j_last
= NULL
;
4115 journal
->j_first
= NULL
;
4117 journal
->j_trans_start_time
= 0;
4118 /* check for trans_id overflow */
4119 if (++journal
->j_trans_id
== 0)
4120 journal
->j_trans_id
= 10;
4121 journal
->j_current_jl
->j_trans_id
= journal
->j_trans_id
;
4122 journal
->j_must_wait
= 0;
4123 journal
->j_len_alloc
= 0;
4124 journal
->j_next_full_flush
= 0;
4125 journal
->j_next_async_flush
= 0;
4126 init_journal_hash(p_s_sb
);
4128 // make sure reiserfs_add_jh sees the new current_jl before we
4129 // write out the tails
4132 /* tail conversion targets have to hit the disk before we end the
4133 * transaction. Otherwise a later transaction might repack the tail
4134 * before this transaction commits, leaving the data block unflushed and
4135 * clean, if we crash before the later transaction commits, the data block
4138 if (!list_empty(&jl
->j_tail_bh_list
)) {
4140 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
4141 journal
, jl
, &jl
->j_tail_bh_list
);
4144 if (!list_empty(&jl
->j_tail_bh_list
))
4146 up(&jl
->j_commit_lock
);
4148 /* honor the flush wishes from the caller, simple commits can
4149 ** be done outside the journal lock, they are done below
4151 ** if we don't flush the commit list right now, we put it into
4152 ** the work queue so the people waiting on the async progress work
4153 ** queue don't wait for this proc to flush journal lists and such.
4156 flush_commit_list(p_s_sb
, jl
, 1);
4157 flush_journal_list(p_s_sb
, jl
, 1);
4158 } else if (!(jl
->j_state
& LIST_COMMIT_PENDING
))
4159 queue_delayed_work(commit_wq
, &journal
->j_work
, HZ
/ 10);
4161 /* if the next transaction has any chance of wrapping, flush
4162 ** transactions that might get overwritten. If any journal lists are very
4163 ** old flush them as well.
4166 list_for_each_safe(entry
, safe
, &journal
->j_journal_list
) {
4167 temp_jl
= JOURNAL_LIST_ENTRY(entry
);
4168 if (journal
->j_start
<= temp_jl
->j_start
) {
4169 if ((journal
->j_start
+ journal
->j_trans_max
+ 1) >=
4171 flush_used_journal_lists(p_s_sb
, temp_jl
);
4173 } else if ((journal
->j_start
+
4174 journal
->j_trans_max
+ 1) <
4175 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4176 /* if we don't cross into the next transaction and we don't
4177 * wrap, there is no way we can overlap any later transactions
4182 } else if ((journal
->j_start
+
4183 journal
->j_trans_max
+ 1) >
4184 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4185 if (((journal
->j_start
+ journal
->j_trans_max
+ 1) %
4186 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) >=
4188 flush_used_journal_lists(p_s_sb
, temp_jl
);
4191 /* we don't overlap anything from out start to the end of the
4192 * log, and our wrapped portion doesn't overlap anything at
4193 * the start of the log. We can break
4199 flush_old_journal_lists(p_s_sb
);
4201 journal
->j_current_jl
->j_list_bitmap
=
4202 get_list_bitmap(p_s_sb
, journal
->j_current_jl
);
4204 if (!(journal
->j_current_jl
->j_list_bitmap
)) {
4205 reiserfs_panic(p_s_sb
,
4206 "journal-1996: do_journal_end, could not get a list bitmap\n");
4209 atomic_set(&(journal
->j_jlock
), 0);
4210 unlock_journal(p_s_sb
);
4211 /* wake up any body waiting to join. */
4212 clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
4213 wake_up(&(journal
->j_join_wait
));
4215 if (!flush
&& wait_on_commit
&&
4216 journal_list_still_alive(p_s_sb
, commit_trans_id
)) {
4217 flush_commit_list(p_s_sb
, jl
, 1);
4220 reiserfs_check_lock_depth(p_s_sb
, "journal end2");
4222 memset(th
, 0, sizeof(*th
));
4223 /* Re-set th->t_super, so we can properly keep track of how many
4224 * persistent transactions there are. We need to do this so if this
4225 * call is part of a failed restart_transaction, we can free it later */
4226 th
->t_super
= p_s_sb
;
4228 return journal
->j_errno
;
4231 static void __reiserfs_journal_abort_hard(struct super_block
*sb
)
4233 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4234 if (test_bit(J_ABORTED
, &journal
->j_state
))
4237 printk(KERN_CRIT
"REISERFS: Aborting journal for filesystem on %s\n",
4238 reiserfs_bdevname(sb
));
4240 sb
->s_flags
|= MS_RDONLY
;
4241 set_bit(J_ABORTED
, &journal
->j_state
);
4243 #ifdef CONFIG_REISERFS_CHECK
4248 static void __reiserfs_journal_abort_soft(struct super_block
*sb
, int errno
)
4250 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4251 if (test_bit(J_ABORTED
, &journal
->j_state
))
4254 if (!journal
->j_errno
)
4255 journal
->j_errno
= errno
;
4257 __reiserfs_journal_abort_hard(sb
);
4260 void reiserfs_journal_abort(struct super_block
*sb
, int errno
)
4262 return __reiserfs_journal_abort_soft(sb
, errno
);