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 <linux/config.h>
38 #include <asm/uaccess.h>
39 #include <asm/system.h>
41 #include <linux/time.h>
42 #include <asm/semaphore.h>
44 #include <linux/vmalloc.h>
45 #include <linux/reiserfs_fs.h>
47 #include <linux/kernel.h>
48 #include <linux/errno.h>
49 #include <linux/fcntl.h>
50 #include <linux/stat.h>
51 #include <linux/string.h>
52 #include <linux/smp_lock.h>
53 #include <linux/buffer_head.h>
54 #include <linux/workqueue.h>
55 #include <linux/writeback.h>
56 #include <linux/blkdev.h>
59 /* gets a struct reiserfs_journal_list * from a list head */
60 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
62 #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
65 /* the number of mounted filesystems. This is used to decide when to
66 ** start and kill the commit workqueue
68 static int reiserfs_mounted_fs_count
;
70 static struct workqueue_struct
*commit_wq
;
72 #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit
74 #define BUFNR 64 /*read ahead */
76 /* cnode stat bits. Move these into reiserfs_fs.h */
78 #define BLOCK_FREED 2 /* this block was freed, and can't be written. */
79 #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */
81 #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */
82 #define BLOCK_DIRTIED 5
85 /* journal list state bits */
86 #define LIST_TOUCHED 1
88 #define LIST_COMMIT_PENDING 4 /* someone will commit this list */
90 /* flags for do_journal_end */
91 #define FLUSH_ALL 1 /* flush commit and real blocks */
92 #define COMMIT_NOW 2 /* end and commit this transaction */
93 #define WAIT 4 /* wait for the log blocks to hit the disk*/
95 static int do_journal_end(struct reiserfs_transaction_handle
*,struct super_block
*,unsigned long nblocks
,int flags
) ;
96 static int flush_journal_list(struct super_block
*s
, struct reiserfs_journal_list
*jl
, int flushall
) ;
97 static int flush_commit_list(struct super_block
*s
, struct reiserfs_journal_list
*jl
, int flushall
) ;
98 static int can_dirty(struct reiserfs_journal_cnode
*cn
) ;
99 static int journal_join(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, unsigned long nblocks
);
100 static int release_journal_dev( struct super_block
*super
,
101 struct reiserfs_journal
*journal
);
102 static int dirty_one_transaction(struct super_block
*s
,
103 struct reiserfs_journal_list
*jl
);
104 static void flush_async_commits(void *p
);
105 static void queue_log_writer(struct super_block
*s
);
107 /* values for join in do_journal_begin_r */
109 JBEGIN_REG
= 0, /* regular journal begin */
110 JBEGIN_JOIN
= 1, /* join the running transaction if at all possible */
111 JBEGIN_ABORT
= 2, /* called from cleanup code, ignores aborted flag */
114 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
115 struct super_block
* p_s_sb
,
116 unsigned long nblocks
,int join
);
118 static void init_journal_hash(struct super_block
*p_s_sb
) {
119 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
120 memset(journal
->j_hash_table
, 0, JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*)) ;
124 ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to
125 ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for
128 static int reiserfs_clean_and_file_buffer(struct buffer_head
*bh
) {
130 clear_buffer_dirty(bh
);
131 clear_buffer_journal_test(bh
);
136 static void disable_barrier(struct super_block
*s
)
138 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_BARRIER_FLUSH
);
139 printk("reiserfs: disabling flush barriers on %s\n", reiserfs_bdevname(s
));
142 static struct reiserfs_bitmap_node
*
143 allocate_bitmap_node(struct super_block
*p_s_sb
) {
144 struct reiserfs_bitmap_node
*bn
;
147 bn
= reiserfs_kmalloc(sizeof(struct reiserfs_bitmap_node
), GFP_NOFS
, p_s_sb
) ;
151 bn
->data
= reiserfs_kmalloc(p_s_sb
->s_blocksize
, GFP_NOFS
, p_s_sb
) ;
153 reiserfs_kfree(bn
, sizeof(struct reiserfs_bitmap_node
), p_s_sb
) ;
157 memset(bn
->data
, 0, p_s_sb
->s_blocksize
) ;
158 INIT_LIST_HEAD(&bn
->list
) ;
162 static struct reiserfs_bitmap_node
*
163 get_bitmap_node(struct super_block
*p_s_sb
) {
164 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
165 struct reiserfs_bitmap_node
*bn
= NULL
;
166 struct list_head
*entry
= journal
->j_bitmap_nodes
.next
;
168 journal
->j_used_bitmap_nodes
++ ;
171 if(entry
!= &journal
->j_bitmap_nodes
) {
172 bn
= list_entry(entry
, struct reiserfs_bitmap_node
, list
) ;
174 memset(bn
->data
, 0, p_s_sb
->s_blocksize
) ;
175 journal
->j_free_bitmap_nodes
-- ;
178 bn
= allocate_bitmap_node(p_s_sb
) ;
185 static inline void free_bitmap_node(struct super_block
*p_s_sb
,
186 struct reiserfs_bitmap_node
*bn
) {
187 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
188 journal
->j_used_bitmap_nodes
-- ;
189 if (journal
->j_free_bitmap_nodes
> REISERFS_MAX_BITMAP_NODES
) {
190 reiserfs_kfree(bn
->data
, p_s_sb
->s_blocksize
, p_s_sb
) ;
191 reiserfs_kfree(bn
, sizeof(struct reiserfs_bitmap_node
), p_s_sb
) ;
193 list_add(&bn
->list
, &journal
->j_bitmap_nodes
) ;
194 journal
->j_free_bitmap_nodes
++ ;
198 static void allocate_bitmap_nodes(struct super_block
*p_s_sb
) {
200 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
201 struct reiserfs_bitmap_node
*bn
= NULL
;
202 for (i
= 0 ; i
< REISERFS_MIN_BITMAP_NODES
; i
++) {
203 bn
= allocate_bitmap_node(p_s_sb
) ;
205 list_add(&bn
->list
, &journal
->j_bitmap_nodes
) ;
206 journal
->j_free_bitmap_nodes
++ ;
208 break ; // this is ok, we'll try again when more are needed
213 static int set_bit_in_list_bitmap(struct super_block
*p_s_sb
, int block
,
214 struct reiserfs_list_bitmap
*jb
) {
215 int bmap_nr
= block
/ (p_s_sb
->s_blocksize
<< 3) ;
216 int bit_nr
= block
% (p_s_sb
->s_blocksize
<< 3) ;
218 if (!jb
->bitmaps
[bmap_nr
]) {
219 jb
->bitmaps
[bmap_nr
] = get_bitmap_node(p_s_sb
) ;
221 set_bit(bit_nr
, (unsigned long *)jb
->bitmaps
[bmap_nr
]->data
) ;
225 static void cleanup_bitmap_list(struct super_block
*p_s_sb
,
226 struct reiserfs_list_bitmap
*jb
) {
228 if (jb
->bitmaps
== NULL
)
231 for (i
= 0 ; i
< SB_BMAP_NR(p_s_sb
) ; i
++) {
232 if (jb
->bitmaps
[i
]) {
233 free_bitmap_node(p_s_sb
, jb
->bitmaps
[i
]) ;
234 jb
->bitmaps
[i
] = NULL
;
240 ** only call this on FS unmount.
242 static int free_list_bitmaps(struct super_block
*p_s_sb
,
243 struct reiserfs_list_bitmap
*jb_array
) {
245 struct reiserfs_list_bitmap
*jb
;
246 for (i
= 0 ; i
< JOURNAL_NUM_BITMAPS
; i
++) {
248 jb
->journal_list
= NULL
;
249 cleanup_bitmap_list(p_s_sb
, jb
) ;
256 static int free_bitmap_nodes(struct super_block
*p_s_sb
) {
257 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
258 struct list_head
*next
= journal
->j_bitmap_nodes
.next
;
259 struct reiserfs_bitmap_node
*bn
;
261 while(next
!= &journal
->j_bitmap_nodes
) {
262 bn
= list_entry(next
, struct reiserfs_bitmap_node
, list
) ;
264 reiserfs_kfree(bn
->data
, p_s_sb
->s_blocksize
, p_s_sb
) ;
265 reiserfs_kfree(bn
, sizeof(struct reiserfs_bitmap_node
), p_s_sb
) ;
266 next
= journal
->j_bitmap_nodes
.next
;
267 journal
->j_free_bitmap_nodes
-- ;
274 ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
275 ** jb_array is the array to be filled in.
277 int reiserfs_allocate_list_bitmaps(struct super_block
*p_s_sb
,
278 struct reiserfs_list_bitmap
*jb_array
,
282 struct reiserfs_list_bitmap
*jb
;
283 int mem
= bmap_nr
* sizeof(struct reiserfs_bitmap_node
*) ;
285 for (i
= 0 ; i
< JOURNAL_NUM_BITMAPS
; i
++) {
287 jb
->journal_list
= NULL
;
288 jb
->bitmaps
= vmalloc( mem
) ;
290 reiserfs_warning(p_s_sb
, "clm-2000, unable to allocate bitmaps for journal lists") ;
294 memset(jb
->bitmaps
, 0, mem
) ;
297 free_list_bitmaps(p_s_sb
, jb_array
) ;
304 ** find an available list bitmap. If you can't find one, flush a commit list
307 static struct reiserfs_list_bitmap
*
308 get_list_bitmap(struct super_block
*p_s_sb
, struct reiserfs_journal_list
*jl
) {
310 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
311 struct reiserfs_list_bitmap
*jb
= NULL
;
313 for (j
= 0 ; j
< (JOURNAL_NUM_BITMAPS
* 3) ; j
++) {
314 i
= journal
->j_list_bitmap_index
;
315 journal
->j_list_bitmap_index
= (i
+ 1) % JOURNAL_NUM_BITMAPS
;
316 jb
= journal
->j_list_bitmap
+ i
;
317 if (journal
->j_list_bitmap
[i
].journal_list
) {
318 flush_commit_list(p_s_sb
, journal
->j_list_bitmap
[i
].journal_list
, 1) ;
319 if (!journal
->j_list_bitmap
[i
].journal_list
) {
326 if (jb
->journal_list
) { /* double check to make sure if flushed correctly */
329 jb
->journal_list
= jl
;
334 ** allocates a new chunk of X nodes, and links them all together as a list.
335 ** Uses the cnode->next and cnode->prev pointers
336 ** returns NULL on failure
338 static struct reiserfs_journal_cnode
*allocate_cnodes(int num_cnodes
) {
339 struct reiserfs_journal_cnode
*head
;
341 if (num_cnodes
<= 0) {
344 head
= vmalloc(num_cnodes
* sizeof(struct reiserfs_journal_cnode
)) ;
348 memset(head
, 0, num_cnodes
* sizeof(struct reiserfs_journal_cnode
)) ;
349 head
[0].prev
= NULL
;
350 head
[0].next
= head
+ 1 ;
351 for (i
= 1 ; i
< num_cnodes
; i
++) {
352 head
[i
].prev
= head
+ (i
- 1) ;
353 head
[i
].next
= head
+ (i
+ 1) ; /* if last one, overwrite it after the if */
355 head
[num_cnodes
-1].next
= NULL
;
360 ** pulls a cnode off the free list, or returns NULL on failure
362 static struct reiserfs_journal_cnode
*get_cnode(struct super_block
*p_s_sb
) {
363 struct reiserfs_journal_cnode
*cn
;
364 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
366 reiserfs_check_lock_depth(p_s_sb
, "get_cnode") ;
368 if (journal
->j_cnode_free
<= 0) {
371 journal
->j_cnode_used
++ ;
372 journal
->j_cnode_free
-- ;
373 cn
= journal
->j_cnode_free_list
;
378 cn
->next
->prev
= NULL
;
380 journal
->j_cnode_free_list
= cn
->next
;
381 memset(cn
, 0, sizeof(struct reiserfs_journal_cnode
)) ;
386 ** returns a cnode to the free list
388 static void free_cnode(struct super_block
*p_s_sb
, struct reiserfs_journal_cnode
*cn
) {
389 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
391 reiserfs_check_lock_depth(p_s_sb
, "free_cnode") ;
393 journal
->j_cnode_used
-- ;
394 journal
->j_cnode_free
++ ;
395 /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
396 cn
->next
= journal
->j_cnode_free_list
;
397 if (journal
->j_cnode_free_list
) {
398 journal
->j_cnode_free_list
->prev
= cn
;
400 cn
->prev
= NULL
; /* not needed with the memset, but I might kill the memset, and forget to do this */
401 journal
->j_cnode_free_list
= cn
;
404 static void clear_prepared_bits(struct buffer_head
*bh
) {
405 clear_buffer_journal_prepared (bh
);
406 clear_buffer_journal_restore_dirty (bh
);
409 /* utility function to force a BUG if it is called without the big
410 ** kernel lock held. caller is the string printed just before calling BUG()
412 void reiserfs_check_lock_depth(struct super_block
*sb
, char *caller
) {
414 if (current
->lock_depth
< 0) {
415 reiserfs_panic (sb
, "%s called without kernel lock held", caller
) ;
422 /* return a cnode with same dev, block number and size in table, or null if not found */
423 static inline struct reiserfs_journal_cnode
*
424 get_journal_hash_dev(struct super_block
*sb
,
425 struct reiserfs_journal_cnode
**table
,
428 struct reiserfs_journal_cnode
*cn
;
429 cn
= journal_hash(table
, sb
, bl
) ;
431 if (cn
->blocknr
== bl
&& cn
->sb
== sb
)
435 return (struct reiserfs_journal_cnode
*)0 ;
439 ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated
440 ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
441 ** being overwritten by a replay after crashing.
443 ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting
444 ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make
445 ** sure you never write the block without logging it.
447 ** next_zero_bit is a suggestion about the next block to try for find_forward.
448 ** when bl is rejected because it is set in a journal list bitmap, we search
449 ** for the next zero bit in the bitmap that rejected bl. Then, we return that
450 ** through next_zero_bit for find_forward to try.
452 ** Just because we return something in next_zero_bit does not mean we won't
453 ** reject it on the next call to reiserfs_in_journal
456 int reiserfs_in_journal(struct super_block
*p_s_sb
,
457 int bmap_nr
, int bit_nr
, int search_all
,
458 b_blocknr_t
*next_zero_bit
) {
459 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
460 struct reiserfs_journal_cnode
*cn
;
461 struct reiserfs_list_bitmap
*jb
;
465 *next_zero_bit
= 0 ; /* always start this at zero. */
467 PROC_INFO_INC( p_s_sb
, journal
.in_journal
);
468 /* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
469 ** if we crash before the transaction that freed it commits, this transaction won't
470 ** have committed either, and the block will never be written
473 for (i
= 0 ; i
< JOURNAL_NUM_BITMAPS
; i
++) {
474 PROC_INFO_INC( p_s_sb
, journal
.in_journal_bitmap
);
475 jb
= journal
->j_list_bitmap
+ i
;
476 if (jb
->journal_list
&& jb
->bitmaps
[bmap_nr
] &&
477 test_bit(bit_nr
, (unsigned long *)jb
->bitmaps
[bmap_nr
]->data
)) {
478 *next_zero_bit
= find_next_zero_bit((unsigned long *)
479 (jb
->bitmaps
[bmap_nr
]->data
),
480 p_s_sb
->s_blocksize
<< 3, bit_nr
+1) ;
486 bl
= bmap_nr
* (p_s_sb
->s_blocksize
<< 3) + bit_nr
;
487 /* is it in any old transactions? */
488 if (search_all
&& (cn
= get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
, bl
))) {
492 /* is it in the current transaction. This should never happen */
493 if ((cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, bl
))) {
498 PROC_INFO_INC( p_s_sb
, journal
.in_journal_reusable
);
503 /* insert cn into table
505 static inline void insert_journal_hash(struct reiserfs_journal_cnode
**table
, struct reiserfs_journal_cnode
*cn
) {
506 struct reiserfs_journal_cnode
*cn_orig
;
508 cn_orig
= journal_hash(table
, cn
->sb
, cn
->blocknr
) ;
509 cn
->hnext
= cn_orig
;
512 cn_orig
->hprev
= cn
;
514 journal_hash(table
, cn
->sb
, cn
->blocknr
) = cn
;
517 /* lock the current transaction */
518 inline static void lock_journal(struct super_block
*p_s_sb
) {
519 PROC_INFO_INC( p_s_sb
, journal
.lock_journal
);
520 down(&SB_JOURNAL(p_s_sb
)->j_lock
);
523 /* unlock the current transaction */
524 inline static void unlock_journal(struct super_block
*p_s_sb
) {
525 up(&SB_JOURNAL(p_s_sb
)->j_lock
);
528 static inline void get_journal_list(struct reiserfs_journal_list
*jl
)
533 static inline void put_journal_list(struct super_block
*s
,
534 struct reiserfs_journal_list
*jl
)
536 if (jl
->j_refcount
< 1) {
537 reiserfs_panic (s
, "trans id %lu, refcount at %d", jl
->j_trans_id
,
540 if (--jl
->j_refcount
== 0)
541 reiserfs_kfree(jl
, sizeof(struct reiserfs_journal_list
), s
);
545 ** this used to be much more involved, and I'm keeping it just in case things get ugly again.
546 ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
549 static void cleanup_freed_for_journal_list(struct super_block
*p_s_sb
, struct reiserfs_journal_list
*jl
) {
551 struct reiserfs_list_bitmap
*jb
= jl
->j_list_bitmap
;
553 cleanup_bitmap_list(p_s_sb
, jb
) ;
555 jl
->j_list_bitmap
->journal_list
= NULL
;
556 jl
->j_list_bitmap
= NULL
;
559 static int journal_list_still_alive(struct super_block
*s
,
560 unsigned long trans_id
)
562 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
563 struct list_head
*entry
= &journal
->j_journal_list
;
564 struct reiserfs_journal_list
*jl
;
566 if (!list_empty(entry
)) {
567 jl
= JOURNAL_LIST_ENTRY(entry
->next
);
568 if (jl
->j_trans_id
<= trans_id
) {
575 static void reiserfs_end_buffer_io_sync(struct buffer_head
*bh
, int uptodate
) {
576 char b
[BDEVNAME_SIZE
];
578 if (buffer_journaled(bh
)) {
579 reiserfs_warning(NULL
, "clm-2084: pinned buffer %lu:%s sent to disk",
580 bh
->b_blocknr
, bdevname(bh
->b_bdev
, b
)) ;
583 set_buffer_uptodate(bh
) ;
585 clear_buffer_uptodate(bh
) ;
590 static void reiserfs_end_ordered_io(struct buffer_head
*bh
, int uptodate
) {
592 set_buffer_uptodate(bh
) ;
594 clear_buffer_uptodate(bh
) ;
599 static void submit_logged_buffer(struct buffer_head
*bh
) {
601 bh
->b_end_io
= reiserfs_end_buffer_io_sync
;
602 clear_buffer_journal_new (bh
);
603 clear_buffer_dirty(bh
) ;
604 if (!test_clear_buffer_journal_test (bh
))
606 if (!buffer_uptodate(bh
))
608 submit_bh(WRITE
, bh
) ;
611 static void submit_ordered_buffer(struct buffer_head
*bh
) {
613 bh
->b_end_io
= reiserfs_end_ordered_io
;
614 clear_buffer_dirty(bh
) ;
615 if (!buffer_uptodate(bh
))
617 submit_bh(WRITE
, bh
) ;
620 static int submit_barrier_buffer(struct buffer_head
*bh
) {
622 bh
->b_end_io
= reiserfs_end_ordered_io
;
623 clear_buffer_dirty(bh
) ;
624 if (!buffer_uptodate(bh
))
626 return submit_bh(WRITE_BARRIER
, bh
) ;
629 static void check_barrier_completion(struct super_block
*s
,
630 struct buffer_head
*bh
) {
631 if (buffer_eopnotsupp(bh
)) {
632 clear_buffer_eopnotsupp(bh
);
634 set_buffer_uptodate(bh
);
635 set_buffer_dirty(bh
);
636 sync_dirty_buffer(bh
);
640 #define CHUNK_SIZE 32
641 struct buffer_chunk
{
642 struct buffer_head
*bh
[CHUNK_SIZE
];
646 static void write_chunk(struct buffer_chunk
*chunk
) {
648 for (i
= 0; i
< chunk
->nr
; i
++) {
649 submit_logged_buffer(chunk
->bh
[i
]) ;
654 static void write_ordered_chunk(struct buffer_chunk
*chunk
) {
656 for (i
= 0; i
< chunk
->nr
; i
++) {
657 submit_ordered_buffer(chunk
->bh
[i
]) ;
662 static int add_to_chunk(struct buffer_chunk
*chunk
, struct buffer_head
*bh
,
664 void (fn
)(struct buffer_chunk
*))
667 if (chunk
->nr
>= CHUNK_SIZE
)
669 chunk
->bh
[chunk
->nr
++] = bh
;
670 if (chunk
->nr
>= CHUNK_SIZE
) {
682 static atomic_t nr_reiserfs_jh
= ATOMIC_INIT(0);
683 static struct reiserfs_jh
*alloc_jh(void) {
684 struct reiserfs_jh
*jh
;
686 jh
= kmalloc(sizeof(*jh
), GFP_NOFS
);
688 atomic_inc(&nr_reiserfs_jh
);
696 * we want to free the jh when the buffer has been written
699 void reiserfs_free_jh(struct buffer_head
*bh
) {
700 struct reiserfs_jh
*jh
;
704 bh
->b_private
= NULL
;
706 list_del_init(&jh
->list
);
708 if (atomic_read(&nr_reiserfs_jh
) <= 0)
710 atomic_dec(&nr_reiserfs_jh
);
715 static inline int __add_jh(struct reiserfs_journal
*j
, struct buffer_head
*bh
,
718 struct reiserfs_jh
*jh
;
721 spin_lock(&j
->j_dirty_buffers_lock
);
722 if (!bh
->b_private
) {
723 spin_unlock(&j
->j_dirty_buffers_lock
);
727 list_del_init(&jh
->list
);
732 spin_lock(&j
->j_dirty_buffers_lock
);
733 /* buffer must be locked for __add_jh, should be able to have
734 * two adds at the same time
741 jh
->jl
= j
->j_current_jl
;
743 list_add_tail(&jh
->list
, &jh
->jl
->j_tail_bh_list
);
745 list_add_tail(&jh
->list
, &jh
->jl
->j_bh_list
);
747 spin_unlock(&j
->j_dirty_buffers_lock
);
751 int reiserfs_add_tail_list(struct inode
*inode
, struct buffer_head
*bh
) {
752 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 1);
754 int reiserfs_add_ordered_list(struct inode
*inode
, struct buffer_head
*bh
) {
755 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 0);
758 #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
759 static int write_ordered_buffers(spinlock_t
*lock
,
760 struct reiserfs_journal
*j
,
761 struct reiserfs_journal_list
*jl
,
762 struct list_head
*list
)
764 struct buffer_head
*bh
;
765 struct reiserfs_jh
*jh
;
766 int ret
= j
->j_errno
;
767 struct buffer_chunk chunk
;
768 struct list_head tmp
;
769 INIT_LIST_HEAD(&tmp
);
773 while(!list_empty(list
)) {
774 jh
= JH_ENTRY(list
->next
);
777 if (test_set_buffer_locked(bh
)) {
778 if (!buffer_dirty(bh
)) {
779 list_del_init(&jh
->list
);
780 list_add(&jh
->list
, &tmp
);
785 write_ordered_chunk(&chunk
);
791 if (buffer_dirty(bh
)) {
792 list_del_init(&jh
->list
);
793 list_add(&jh
->list
, &tmp
);
794 add_to_chunk(&chunk
, bh
, lock
, write_ordered_chunk
);
796 reiserfs_free_jh(bh
);
801 cond_resched_lock(lock
);
805 write_ordered_chunk(&chunk
);
808 while(!list_empty(&tmp
)) {
809 jh
= JH_ENTRY(tmp
.prev
);
812 reiserfs_free_jh(bh
);
814 if (buffer_locked(bh
)) {
819 if (!buffer_uptodate(bh
)) {
823 cond_resched_lock(lock
);
829 static int flush_older_commits(struct super_block
*s
, struct reiserfs_journal_list
*jl
) {
830 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
831 struct reiserfs_journal_list
*other_jl
;
832 struct reiserfs_journal_list
*first_jl
;
833 struct list_head
*entry
;
834 unsigned long trans_id
= jl
->j_trans_id
;
835 unsigned long other_trans_id
;
836 unsigned long first_trans_id
;
840 * first we walk backwards to find the oldest uncommitted transation
843 entry
= jl
->j_list
.prev
;
845 other_jl
= JOURNAL_LIST_ENTRY(entry
);
846 if (entry
== &journal
->j_journal_list
||
847 atomic_read(&other_jl
->j_older_commits_done
))
851 entry
= other_jl
->j_list
.prev
;
854 /* if we didn't find any older uncommitted transactions, return now */
855 if (first_jl
== jl
) {
859 first_trans_id
= first_jl
->j_trans_id
;
861 entry
= &first_jl
->j_list
;
863 other_jl
= JOURNAL_LIST_ENTRY(entry
);
864 other_trans_id
= other_jl
->j_trans_id
;
866 if (other_trans_id
< trans_id
) {
867 if (atomic_read(&other_jl
->j_commit_left
) != 0) {
868 flush_commit_list(s
, other_jl
, 0);
870 /* list we were called with is gone, return */
871 if (!journal_list_still_alive(s
, trans_id
))
874 /* the one we just flushed is gone, this means all
875 * older lists are also gone, so first_jl is no longer
876 * valid either. Go back to the beginning.
878 if (!journal_list_still_alive(s
, other_trans_id
)) {
883 if (entry
== &journal
->j_journal_list
)
891 int reiserfs_async_progress_wait(struct super_block
*s
) {
893 struct reiserfs_journal
*j
= SB_JOURNAL(s
);
894 if (atomic_read(&j
->j_async_throttle
))
895 blk_congestion_wait(WRITE
, HZ
/10);
900 ** if this journal list still has commit blocks unflushed, send them to disk.
902 ** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
903 ** Before the commit block can by written, every other log block must be safely on disk
906 static int flush_commit_list(struct super_block
*s
, struct reiserfs_journal_list
*jl
, int flushall
) {
909 struct buffer_head
*tbh
= NULL
;
910 unsigned long trans_id
= jl
->j_trans_id
;
911 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
915 reiserfs_check_lock_depth(s
, "flush_commit_list") ;
917 if (atomic_read(&jl
->j_older_commits_done
)) {
921 /* before we can put our commit blocks on disk, we have to make sure everyone older than
924 BUG_ON (jl
->j_len
<= 0);
925 BUG_ON (trans_id
== journal
->j_trans_id
);
927 get_journal_list(jl
);
929 if (flush_older_commits(s
, jl
) == 1) {
930 /* list disappeared during flush_older_commits. return */
935 /* make sure nobody is trying to flush this one at the same time */
936 down(&jl
->j_commit_lock
);
937 if (!journal_list_still_alive(s
, trans_id
)) {
938 up(&jl
->j_commit_lock
);
941 BUG_ON (jl
->j_trans_id
== 0);
943 /* this commit is done, exit */
944 if (atomic_read(&(jl
->j_commit_left
)) <= 0) {
946 atomic_set(&(jl
->j_older_commits_done
), 1) ;
948 up(&jl
->j_commit_lock
);
952 if (!list_empty(&jl
->j_bh_list
)) {
954 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
955 journal
, jl
, &jl
->j_bh_list
);
958 BUG_ON (!list_empty(&jl
->j_bh_list
));
960 * for the description block and all the log blocks, submit any buffers
961 * that haven't already reached the disk
963 atomic_inc(&journal
->j_async_throttle
);
964 for (i
= 0 ; i
< (jl
->j_len
+ 1) ; i
++) {
965 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) + (jl
->j_start
+i
) %
966 SB_ONDISK_JOURNAL_SIZE(s
);
967 tbh
= journal_find_get_block(s
, bn
) ;
968 if (buffer_dirty(tbh
)) /* redundant, ll_rw_block() checks */
969 ll_rw_block(WRITE
, 1, &tbh
) ;
972 atomic_dec(&journal
->j_async_throttle
);
974 /* wait on everything written so far before writing the commit
975 * if we are in barrier mode, send the commit down now
977 barrier
= reiserfs_barrier_flush(s
);
980 lock_buffer(jl
->j_commit_bh
);
981 ret
= submit_barrier_buffer(jl
->j_commit_bh
);
982 if (ret
== -EOPNOTSUPP
) {
983 set_buffer_uptodate(jl
->j_commit_bh
);
988 for (i
= 0 ; i
< (jl
->j_len
+ 1) ; i
++) {
989 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) +
990 (jl
->j_start
+ i
) % SB_ONDISK_JOURNAL_SIZE(s
) ;
991 tbh
= journal_find_get_block(s
, bn
) ;
992 wait_on_buffer(tbh
) ;
993 // since we're using ll_rw_blk above, it might have skipped over
994 // a locked buffer. Double check here
996 if (buffer_dirty(tbh
)) /* redundant, sync_dirty_buffer() checks */
997 sync_dirty_buffer(tbh
);
998 if (unlikely (!buffer_uptodate(tbh
))) {
999 #ifdef CONFIG_REISERFS_CHECK
1000 reiserfs_warning(s
, "journal-601, buffer write failed") ;
1004 put_bh(tbh
) ; /* once for journal_find_get_block */
1005 put_bh(tbh
) ; /* once due to original getblk in do_journal_end */
1006 atomic_dec(&(jl
->j_commit_left
)) ;
1009 BUG_ON (atomic_read(&(jl
->j_commit_left
)) != 1);
1012 if (buffer_dirty(jl
->j_commit_bh
))
1014 mark_buffer_dirty(jl
->j_commit_bh
) ;
1015 sync_dirty_buffer(jl
->j_commit_bh
) ;
1017 wait_on_buffer(jl
->j_commit_bh
);
1019 check_barrier_completion(s
, jl
->j_commit_bh
);
1021 /* If there was a write error in the journal - we can't commit this
1022 * transaction - it will be invalid and, if successful, will just end
1023 * up propogating the write error out to the filesystem. */
1024 if (unlikely (!buffer_uptodate(jl
->j_commit_bh
))) {
1025 #ifdef CONFIG_REISERFS_CHECK
1026 reiserfs_warning(s
, "journal-615: buffer write failed") ;
1030 bforget(jl
->j_commit_bh
) ;
1031 if (journal
->j_last_commit_id
!= 0 &&
1032 (jl
->j_trans_id
- journal
->j_last_commit_id
) != 1) {
1033 reiserfs_warning(s
, "clm-2200: last commit %lu, current %lu",
1034 journal
->j_last_commit_id
,
1037 journal
->j_last_commit_id
= jl
->j_trans_id
;
1039 /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */
1040 cleanup_freed_for_journal_list(s
, jl
) ;
1042 retval
= retval
? retval
: journal
->j_errno
;
1044 /* mark the metadata dirty */
1046 dirty_one_transaction(s
, jl
);
1047 atomic_dec(&(jl
->j_commit_left
)) ;
1050 atomic_set(&(jl
->j_older_commits_done
), 1) ;
1052 up(&jl
->j_commit_lock
);
1054 put_journal_list(s
, jl
);
1057 reiserfs_abort (s
, retval
, "Journal write error in %s", __FUNCTION__
);
1062 ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or
1063 ** returns NULL if it can't find anything
1065 static struct reiserfs_journal_list
*find_newer_jl_for_cn(struct reiserfs_journal_cnode
*cn
) {
1066 struct super_block
*sb
= cn
->sb
;
1067 b_blocknr_t blocknr
= cn
->blocknr
;
1071 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
) {
1079 static void remove_journal_hash(struct super_block
*, struct reiserfs_journal_cnode
**,
1080 struct reiserfs_journal_list
*, unsigned long, int);
1083 ** once all the real blocks have been flushed, it is safe to remove them from the
1084 ** journal list for this transaction. Aside from freeing the cnode, this also allows the
1085 ** block to be reallocated for data blocks if it had been deleted.
1087 static void remove_all_from_journal_list(struct super_block
*p_s_sb
, struct reiserfs_journal_list
*jl
, int debug
) {
1088 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
1089 struct reiserfs_journal_cnode
*cn
, *last
;
1090 cn
= jl
->j_realblock
;
1092 /* which is better, to lock once around the whole loop, or
1093 ** to lock for each call to remove_journal_hash?
1096 if (cn
->blocknr
!= 0) {
1098 reiserfs_warning (p_s_sb
, "block %u, bh is %d, state %ld", cn
->blocknr
,
1099 cn
->bh
? 1: 0, cn
->state
) ;
1102 remove_journal_hash(p_s_sb
, journal
->j_list_hash_table
, jl
, cn
->blocknr
, 1) ;
1106 free_cnode(p_s_sb
, last
) ;
1108 jl
->j_realblock
= NULL
;
1112 ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
1113 ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
1114 ** releasing blocks in this transaction for reuse as data blocks.
1115 ** called by flush_journal_list, before it calls remove_all_from_journal_list
1118 static int _update_journal_header_block(struct super_block
*p_s_sb
, unsigned long offset
, unsigned long trans_id
) {
1119 struct reiserfs_journal_header
*jh
;
1120 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
1122 if (reiserfs_is_journal_aborted (journal
))
1125 if (trans_id
>= journal
->j_last_flush_trans_id
) {
1126 if (buffer_locked((journal
->j_header_bh
))) {
1127 wait_on_buffer((journal
->j_header_bh
)) ;
1128 if (unlikely (!buffer_uptodate(journal
->j_header_bh
))) {
1129 #ifdef CONFIG_REISERFS_CHECK
1130 reiserfs_warning (p_s_sb
, "journal-699: buffer write failed") ;
1135 journal
->j_last_flush_trans_id
= trans_id
;
1136 journal
->j_first_unflushed_offset
= offset
;
1137 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
) ;
1138 jh
->j_last_flush_trans_id
= cpu_to_le32(trans_id
) ;
1139 jh
->j_first_unflushed_offset
= cpu_to_le32(offset
) ;
1140 jh
->j_mount_id
= cpu_to_le32(journal
->j_mount_id
) ;
1142 if (reiserfs_barrier_flush(p_s_sb
)) {
1144 lock_buffer(journal
->j_header_bh
);
1145 ret
= submit_barrier_buffer(journal
->j_header_bh
);
1146 if (ret
== -EOPNOTSUPP
) {
1147 set_buffer_uptodate(journal
->j_header_bh
);
1148 disable_barrier(p_s_sb
);
1151 wait_on_buffer(journal
->j_header_bh
);
1152 check_barrier_completion(p_s_sb
, journal
->j_header_bh
);
1155 set_buffer_dirty(journal
->j_header_bh
) ;
1156 sync_dirty_buffer(journal
->j_header_bh
) ;
1158 if (!buffer_uptodate(journal
->j_header_bh
)) {
1159 reiserfs_warning (p_s_sb
, "journal-837: IO error during journal replay");
1166 static int update_journal_header_block(struct super_block
*p_s_sb
,
1167 unsigned long offset
,
1168 unsigned long trans_id
) {
1169 return _update_journal_header_block(p_s_sb
, offset
, trans_id
);
1172 ** flush any and all journal lists older than you are
1173 ** can only be called from flush_journal_list
1175 static int flush_older_journal_lists(struct super_block
*p_s_sb
,
1176 struct reiserfs_journal_list
*jl
)
1178 struct list_head
*entry
;
1179 struct reiserfs_journal_list
*other_jl
;
1180 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
1181 unsigned long trans_id
= jl
->j_trans_id
;
1183 /* we know we are the only ones flushing things, no extra race
1184 * protection is required.
1187 entry
= journal
->j_journal_list
.next
;
1189 if (entry
== &journal
->j_journal_list
)
1191 other_jl
= JOURNAL_LIST_ENTRY(entry
);
1192 if (other_jl
->j_trans_id
< trans_id
) {
1193 BUG_ON (other_jl
->j_refcount
<= 0);
1194 /* do not flush all */
1195 flush_journal_list(p_s_sb
, other_jl
, 0) ;
1197 /* other_jl is now deleted from the list */
1203 static void del_from_work_list(struct super_block
*s
,
1204 struct reiserfs_journal_list
*jl
) {
1205 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
1206 if (!list_empty(&jl
->j_working_list
)) {
1207 list_del_init(&jl
->j_working_list
);
1208 journal
->j_num_work_lists
--;
1212 /* flush a journal list, both commit and real blocks
1214 ** always set flushall to 1, unless you are calling from inside
1215 ** flush_journal_list
1217 ** IMPORTANT. This can only be called while there are no journal writers,
1218 ** and the journal is locked. That means it can only be called from
1219 ** do_journal_end, or by journal_release
1221 static int flush_journal_list(struct super_block
*s
,
1222 struct reiserfs_journal_list
*jl
, int flushall
) {
1223 struct reiserfs_journal_list
*pjl
;
1224 struct reiserfs_journal_cnode
*cn
, *last
;
1228 struct buffer_head
*saved_bh
;
1229 unsigned long j_len_saved
= jl
->j_len
;
1230 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
1233 BUG_ON (j_len_saved
<= 0);
1235 if (atomic_read(&journal
->j_wcount
) != 0) {
1236 reiserfs_warning(s
, "clm-2048: flush_journal_list called with wcount %d",
1237 atomic_read(&journal
->j_wcount
)) ;
1239 BUG_ON (jl
->j_trans_id
== 0);
1241 /* if flushall == 0, the lock is already held */
1243 down(&journal
->j_flush_sem
);
1244 } else if (!down_trylock(&journal
->j_flush_sem
)) {
1249 if (j_len_saved
> journal
->j_trans_max
) {
1250 reiserfs_panic(s
, "journal-715: flush_journal_list, length is %lu, trans id %lu\n", j_len_saved
, jl
->j_trans_id
);
1254 /* if all the work is already done, get out of here */
1255 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1256 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1257 goto flush_older_and_return
;
1260 /* start by putting the commit list on disk. This will also flush
1261 ** the commit lists of any olders transactions
1263 flush_commit_list(s
, jl
, 1) ;
1265 if (!(jl
->j_state
& LIST_DIRTY
) && !reiserfs_is_journal_aborted (journal
))
1268 /* are we done now? */
1269 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1270 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1271 goto flush_older_and_return
;
1274 /* loop through each cnode, see if we need to write it,
1275 ** or wait on a more recent transaction, or just ignore it
1277 if (atomic_read(&(journal
->j_wcount
)) != 0) {
1278 reiserfs_panic(s
, "journal-844: panic journal list is flushing, wcount is not 0\n") ;
1280 cn
= jl
->j_realblock
;
1285 /* blocknr of 0 is no longer in the hash, ignore it */
1286 if (cn
->blocknr
== 0) {
1290 /* This transaction failed commit. Don't write out to the disk */
1291 if (!(jl
->j_state
& LIST_DIRTY
))
1294 pjl
= find_newer_jl_for_cn(cn
) ;
1295 /* the order is important here. We check pjl to make sure we
1296 ** don't clear BH_JDirty_wait if we aren't the one writing this
1299 if (!pjl
&& cn
->bh
) {
1302 /* we do this to make sure nobody releases the buffer while
1303 ** we are working with it
1307 if (buffer_journal_dirty(saved_bh
)) {
1308 BUG_ON (!can_dirty (cn
));
1311 } else if (can_dirty(cn
)) {
1312 /* everything with !pjl && jwait should be writable */
1317 /* if someone has this block in a newer transaction, just make
1318 ** sure they are commited, and don't try writing it to disk
1321 if (atomic_read(&pjl
->j_commit_left
))
1322 flush_commit_list(s
, pjl
, 1) ;
1326 /* bh == NULL when the block got to disk on its own, OR,
1327 ** the block got freed in a future transaction
1329 if (saved_bh
== NULL
) {
1333 /* this should never happen. kupdate_one_transaction has this list
1334 ** locked while it works, so we should never see a buffer here that
1335 ** is not marked JDirty_wait
1337 if ((!was_jwait
) && !buffer_locked(saved_bh
)) {
1338 reiserfs_warning (s
, "journal-813: BAD! buffer %llu %cdirty %cjwait, "
1339 "not in a newer tranasction",
1340 (unsigned long long)saved_bh
->b_blocknr
,
1341 was_dirty
? ' ' : '!', was_jwait
? ' ' : '!') ;
1344 /* we inc again because saved_bh gets decremented at free_cnode */
1346 set_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
) ;
1347 lock_buffer(saved_bh
);
1348 BUG_ON (cn
->blocknr
!= saved_bh
->b_blocknr
);
1349 if (buffer_dirty(saved_bh
))
1350 submit_logged_buffer(saved_bh
) ;
1352 unlock_buffer(saved_bh
);
1355 reiserfs_warning (s
, "clm-2082: Unable to flush buffer %llu in %s",
1356 (unsigned long long)saved_bh
->b_blocknr
, __FUNCTION__
);
1362 /* we incremented this to keep others from taking the buffer head away */
1364 if (atomic_read(&(saved_bh
->b_count
)) < 0) {
1365 reiserfs_warning (s
, "journal-945: saved_bh->b_count < 0");
1370 cn
= jl
->j_realblock
;
1372 if (test_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
)) {
1374 reiserfs_panic(s
, "journal-1011: cn->bh is NULL\n") ;
1376 wait_on_buffer(cn
->bh
) ;
1378 reiserfs_panic(s
, "journal-1012: cn->bh is NULL\n") ;
1380 if (unlikely (!buffer_uptodate(cn
->bh
))) {
1381 #ifdef CONFIG_REISERFS_CHECK
1382 reiserfs_warning(s
, "journal-949: buffer write failed\n") ;
1386 /* note, we must clear the JDirty_wait bit after the up to date
1387 ** check, otherwise we race against our flushpage routine
1389 BUG_ON (!test_clear_buffer_journal_dirty (cn
->bh
));
1391 /* undo the inc from journal_mark_dirty */
1400 reiserfs_abort (s
, -EIO
, "Write error while pushing transaction to disk in %s", __FUNCTION__
);
1401 flush_older_and_return
:
1404 /* before we can update the journal header block, we _must_ flush all
1405 ** real blocks from all older transactions to disk. This is because
1406 ** once the header block is updated, this transaction will not be
1407 ** replayed after a crash
1410 flush_older_journal_lists(s
, jl
);
1413 err
= journal
->j_errno
;
1414 /* before we can remove everything from the hash tables for this
1415 ** transaction, we must make sure it can never be replayed
1417 ** since we are only called from do_journal_end, we know for sure there
1418 ** are no allocations going on while we are flushing journal lists. So,
1419 ** we only need to update the journal header block for the last list
1422 if (!err
&& flushall
) {
1423 err
= update_journal_header_block(s
, (jl
->j_start
+ jl
->j_len
+ 2) % SB_ONDISK_JOURNAL_SIZE(s
), jl
->j_trans_id
) ;
1425 reiserfs_abort (s
, -EIO
, "Write error while updating journal header in %s", __FUNCTION__
);
1427 remove_all_from_journal_list(s
, jl
, 0) ;
1428 list_del_init(&jl
->j_list
);
1429 journal
->j_num_lists
--;
1430 del_from_work_list(s
, jl
);
1432 if (journal
->j_last_flush_id
!= 0 &&
1433 (jl
->j_trans_id
- journal
->j_last_flush_id
) != 1) {
1434 reiserfs_warning(s
, "clm-2201: last flush %lu, current %lu",
1435 journal
->j_last_flush_id
,
1438 journal
->j_last_flush_id
= jl
->j_trans_id
;
1440 /* not strictly required since we are freeing the list, but it should
1441 * help find code using dead lists later on
1444 atomic_set(&(jl
->j_nonzerolen
), 0) ;
1446 jl
->j_realblock
= NULL
;
1447 jl
->j_commit_bh
= NULL
;
1448 jl
->j_trans_id
= 0 ;
1450 put_journal_list(s
, jl
);
1452 up(&journal
->j_flush_sem
);
1456 static int write_one_transaction(struct super_block
*s
,
1457 struct reiserfs_journal_list
*jl
,
1458 struct buffer_chunk
*chunk
)
1460 struct reiserfs_journal_cnode
*cn
;
1463 jl
->j_state
|= LIST_TOUCHED
;
1464 del_from_work_list(s
, jl
);
1465 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0) {
1469 cn
= jl
->j_realblock
;
1471 /* if the blocknr == 0, this has been cleared from the hash,
1474 if (cn
->blocknr
== 0) {
1477 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(cn
->bh
)) {
1478 struct buffer_head
*tmp_bh
;
1479 /* we can race against journal_mark_freed when we try
1480 * to lock_buffer(cn->bh), so we have to inc the buffer
1481 * count, and recheck things after locking
1485 lock_buffer(tmp_bh
);
1486 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(tmp_bh
)) {
1487 if (!buffer_journal_dirty(tmp_bh
) ||
1488 buffer_journal_prepared(tmp_bh
))
1490 add_to_chunk(chunk
, tmp_bh
, NULL
, write_chunk
);
1493 /* note, cn->bh might be null now */
1494 unlock_buffer(tmp_bh
);
1505 /* used by flush_commit_list */
1506 static int dirty_one_transaction(struct super_block
*s
,
1507 struct reiserfs_journal_list
*jl
)
1509 struct reiserfs_journal_cnode
*cn
;
1510 struct reiserfs_journal_list
*pjl
;
1513 jl
->j_state
|= LIST_DIRTY
;
1514 cn
= jl
->j_realblock
;
1516 /* look for a more recent transaction that logged this
1517 ** buffer. Only the most recent transaction with a buffer in
1518 ** it is allowed to send that buffer to disk
1520 pjl
= find_newer_jl_for_cn(cn
) ;
1521 if (!pjl
&& cn
->blocknr
&& cn
->bh
&& buffer_journal_dirty(cn
->bh
))
1523 BUG_ON (!can_dirty(cn
));
1524 /* if the buffer is prepared, it will either be logged
1525 * or restored. If restored, we need to make sure
1526 * it actually gets marked dirty
1528 clear_buffer_journal_new (cn
->bh
);
1529 if (buffer_journal_prepared (cn
->bh
)) {
1530 set_buffer_journal_restore_dirty (cn
->bh
);
1532 set_buffer_journal_test (cn
->bh
);
1533 mark_buffer_dirty(cn
->bh
);
1541 static int kupdate_transactions(struct super_block
*s
,
1542 struct reiserfs_journal_list
*jl
,
1543 struct reiserfs_journal_list
**next_jl
,
1544 unsigned long *next_trans_id
,
1549 int transactions_flushed
= 0;
1550 unsigned long orig_trans_id
= jl
->j_trans_id
;
1551 struct buffer_chunk chunk
;
1552 struct list_head
*entry
;
1553 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
1556 down(&journal
->j_flush_sem
);
1557 if (!journal_list_still_alive(s
, orig_trans_id
)) {
1561 /* we've got j_flush_sem held, nobody is going to delete any
1562 * of these lists out from underneath us
1564 while((num_trans
&& transactions_flushed
< num_trans
) ||
1565 (!num_trans
&& written
< num_blocks
)) {
1567 if (jl
->j_len
== 0 || (jl
->j_state
& LIST_TOUCHED
) ||
1568 atomic_read(&jl
->j_commit_left
) || !(jl
->j_state
& LIST_DIRTY
))
1570 del_from_work_list(s
, jl
);
1573 ret
= write_one_transaction(s
, jl
, &chunk
);
1577 transactions_flushed
++;
1579 entry
= jl
->j_list
.next
;
1582 if (entry
== &journal
->j_journal_list
) {
1585 jl
= JOURNAL_LIST_ENTRY(entry
);
1587 /* don't bother with older transactions */
1588 if (jl
->j_trans_id
<= orig_trans_id
)
1592 write_chunk(&chunk
);
1596 up(&journal
->j_flush_sem
);
1600 /* for o_sync and fsync heavy applications, they tend to use
1601 ** all the journa list slots with tiny transactions. These
1602 ** trigger lots and lots of calls to update the header block, which
1603 ** adds seeks and slows things down.
1605 ** This function tries to clear out a large chunk of the journal lists
1606 ** at once, which makes everything faster since only the newest journal
1607 ** list updates the header block
1609 static int flush_used_journal_lists(struct super_block
*s
,
1610 struct reiserfs_journal_list
*jl
) {
1611 unsigned long len
= 0;
1612 unsigned long cur_len
;
1616 struct reiserfs_journal_list
*tjl
;
1617 struct reiserfs_journal_list
*flush_jl
;
1618 unsigned long trans_id
;
1619 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
1621 flush_jl
= tjl
= jl
;
1623 /* in data logging mode, try harder to flush a lot of blocks */
1624 if (reiserfs_data_log(s
))
1626 /* flush for 256 transactions or limit blocks, whichever comes first */
1627 for(i
= 0 ; i
< 256 && len
< limit
; i
++) {
1628 if (atomic_read(&tjl
->j_commit_left
) ||
1629 tjl
->j_trans_id
< jl
->j_trans_id
) {
1632 cur_len
= atomic_read(&tjl
->j_nonzerolen
);
1634 tjl
->j_state
&= ~LIST_TOUCHED
;
1638 if (tjl
->j_list
.next
== &journal
->j_journal_list
)
1640 tjl
= JOURNAL_LIST_ENTRY(tjl
->j_list
.next
);
1642 /* try to find a group of blocks we can flush across all the
1643 ** transactions, but only bother if we've actually spanned
1644 ** across multiple lists
1646 if (flush_jl
!= jl
) {
1647 ret
= kupdate_transactions(s
, jl
, &tjl
, &trans_id
, len
, i
);
1649 flush_journal_list(s
, flush_jl
, 1);
1654 ** removes any nodes in table with name block and dev as bh.
1655 ** only touchs the hnext and hprev pointers.
1657 void remove_journal_hash(struct super_block
*sb
,
1658 struct reiserfs_journal_cnode
**table
,
1659 struct reiserfs_journal_list
*jl
,
1660 unsigned long block
, int remove_freed
)
1662 struct reiserfs_journal_cnode
*cur
;
1663 struct reiserfs_journal_cnode
**head
;
1665 head
= &(journal_hash(table
, sb
, block
)) ;
1671 if (cur
->blocknr
== block
&& cur
->sb
== sb
&& (jl
== NULL
|| jl
== cur
->jlist
) &&
1672 (!test_bit(BLOCK_FREED
, &cur
->state
) || remove_freed
)) {
1674 cur
->hnext
->hprev
= cur
->hprev
;
1677 cur
->hprev
->hnext
= cur
->hnext
;
1679 *head
= cur
->hnext
;
1684 if (cur
->bh
&& cur
->jlist
) /* anybody who clears the cur->bh will also dec the nonzerolen */
1685 atomic_dec(&(cur
->jlist
->j_nonzerolen
)) ;
1693 static void free_journal_ram(struct super_block
*p_s_sb
) {
1694 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1695 reiserfs_kfree(journal
->j_current_jl
,
1696 sizeof(struct reiserfs_journal_list
), p_s_sb
);
1697 journal
->j_num_lists
--;
1699 vfree(journal
->j_cnode_free_orig
) ;
1700 free_list_bitmaps(p_s_sb
, journal
->j_list_bitmap
) ;
1701 free_bitmap_nodes(p_s_sb
) ; /* must be after free_list_bitmaps */
1702 if (journal
->j_header_bh
) {
1703 brelse(journal
->j_header_bh
) ;
1705 /* j_header_bh is on the journal dev, make sure not to release the journal
1706 * dev until we brelse j_header_bh
1708 release_journal_dev(p_s_sb
, journal
);
1713 ** call on unmount. Only set error to 1 if you haven't made your way out
1714 ** of read_super() yet. Any other caller must keep error at 0.
1716 static int do_journal_release(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, int error
) {
1717 struct reiserfs_transaction_handle myth
;
1719 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1721 /* we only want to flush out transactions if we were called with error == 0
1723 if (!error
&& !(p_s_sb
->s_flags
& MS_RDONLY
)) {
1724 /* end the current trans */
1725 BUG_ON (!th
->t_trans_id
);
1726 do_journal_end(th
, p_s_sb
,10, FLUSH_ALL
) ;
1728 /* make sure something gets logged to force our way into the flush code */
1729 if (!journal_join(&myth
, p_s_sb
, 1)) {
1730 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
), 1) ;
1731 journal_mark_dirty(&myth
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
)) ;
1732 do_journal_end(&myth
, p_s_sb
,1, FLUSH_ALL
) ;
1737 /* this also catches errors during the do_journal_end above */
1738 if (!error
&& reiserfs_is_journal_aborted(journal
)) {
1739 memset(&myth
, 0, sizeof(myth
));
1740 if (!journal_join_abort(&myth
, p_s_sb
, 1)) {
1741 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
), 1) ;
1742 journal_mark_dirty(&myth
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
)) ;
1743 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
) ;
1747 reiserfs_mounted_fs_count
-- ;
1748 /* wait for all commits to finish */
1749 cancel_delayed_work(&SB_JOURNAL(p_s_sb
)->j_work
);
1750 flush_workqueue(commit_wq
);
1751 if (!reiserfs_mounted_fs_count
) {
1752 destroy_workqueue(commit_wq
);
1756 free_journal_ram(p_s_sb
) ;
1762 ** call on unmount. flush all journal trans, release all alloc'd ram
1764 int journal_release(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
) {
1765 return do_journal_release(th
, p_s_sb
, 0) ;
1768 ** only call from an error condition inside reiserfs_read_super!
1770 int journal_release_error(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
) {
1771 return do_journal_release(th
, p_s_sb
, 1) ;
1774 /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */
1775 static int journal_compare_desc_commit(struct super_block
*p_s_sb
, struct reiserfs_journal_desc
*desc
,
1776 struct reiserfs_journal_commit
*commit
) {
1777 if (get_commit_trans_id (commit
) != get_desc_trans_id (desc
) ||
1778 get_commit_trans_len (commit
) != get_desc_trans_len (desc
) ||
1779 get_commit_trans_len (commit
) > SB_JOURNAL(p_s_sb
)->j_trans_max
||
1780 get_commit_trans_len (commit
) <= 0
1786 /* returns 0 if it did not find a description block
1787 ** returns -1 if it found a corrupt commit block
1788 ** returns 1 if both desc and commit were valid
1790 static int journal_transaction_is_valid(struct super_block
*p_s_sb
, struct buffer_head
*d_bh
, unsigned long *oldest_invalid_trans_id
, unsigned long *newest_mount_id
) {
1791 struct reiserfs_journal_desc
*desc
;
1792 struct reiserfs_journal_commit
*commit
;
1793 struct buffer_head
*c_bh
;
1794 unsigned long offset
;
1799 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
1800 if (get_desc_trans_len(desc
) > 0 && !memcmp(get_journal_desc_magic (d_bh
), JOURNAL_DESC_MAGIC
, 8)) {
1801 if (oldest_invalid_trans_id
&& *oldest_invalid_trans_id
&& get_desc_trans_id(desc
) > *oldest_invalid_trans_id
) {
1802 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-986: transaction "
1803 "is valid returning because trans_id %d is greater than "
1804 "oldest_invalid %lu", get_desc_trans_id(desc
),
1805 *oldest_invalid_trans_id
);
1808 if (newest_mount_id
&& *newest_mount_id
> get_desc_mount_id (desc
)) {
1809 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1087: transaction "
1810 "is valid returning because mount_id %d is less than "
1811 "newest_mount_id %lu", get_desc_mount_id (desc
),
1815 if ( get_desc_trans_len(desc
) > SB_JOURNAL(p_s_sb
)->j_trans_max
) {
1816 reiserfs_warning(p_s_sb
, "journal-2018: Bad transaction length %d encountered, ignoring transaction", get_desc_trans_len(desc
));
1819 offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) ;
1821 /* ok, we have a journal description block, lets see if the transaction was valid */
1822 c_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
1823 ((offset
+ get_desc_trans_len(desc
) + 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) ;
1826 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
1827 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
1828 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
1829 "journal_transaction_is_valid, commit offset %ld had bad "
1830 "time %d or length %d",
1831 c_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
1832 get_commit_trans_id (commit
),
1833 get_commit_trans_len(commit
));
1835 if (oldest_invalid_trans_id
) {
1836 *oldest_invalid_trans_id
= get_desc_trans_id(desc
) ;
1837 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1004: "
1838 "transaction_is_valid setting oldest invalid trans_id "
1839 "to %d", get_desc_trans_id(desc
)) ;
1844 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1006: found valid "
1845 "transaction start offset %llu, len %d id %d",
1846 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
1847 get_desc_trans_len(desc
), get_desc_trans_id(desc
)) ;
1854 static void brelse_array(struct buffer_head
**heads
, int num
) {
1856 for (i
= 0 ; i
< num
; i
++) {
1862 ** given the start, and values for the oldest acceptable transactions,
1863 ** this either reads in a replays a transaction, or returns because the transaction
1864 ** is invalid, or too old.
1866 static int journal_read_transaction(struct super_block
*p_s_sb
, unsigned long cur_dblock
, unsigned long oldest_start
,
1867 unsigned long oldest_trans_id
, unsigned long newest_mount_id
) {
1868 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
1869 struct reiserfs_journal_desc
*desc
;
1870 struct reiserfs_journal_commit
*commit
;
1871 unsigned long trans_id
= 0 ;
1872 struct buffer_head
*c_bh
;
1873 struct buffer_head
*d_bh
;
1874 struct buffer_head
**log_blocks
= NULL
;
1875 struct buffer_head
**real_blocks
= NULL
;
1876 unsigned long trans_offset
;
1880 d_bh
= journal_bread(p_s_sb
, cur_dblock
) ;
1883 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
1884 trans_offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) ;
1885 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1037: "
1886 "journal_read_transaction, offset %llu, len %d mount_id %d",
1887 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
1888 get_desc_trans_len(desc
), get_desc_mount_id(desc
)) ;
1889 if (get_desc_trans_id(desc
) < oldest_trans_id
) {
1890 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1039: "
1891 "journal_read_trans skipping because %lu is too old",
1892 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
)) ;
1896 if (get_desc_mount_id(desc
) != newest_mount_id
) {
1897 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1146: "
1898 "journal_read_trans skipping because %d is != "
1899 "newest_mount_id %lu", get_desc_mount_id(desc
),
1904 c_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
1905 ((trans_offset
+ get_desc_trans_len(desc
) + 1) %
1906 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) ;
1911 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
1912 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
1913 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal_read_transaction, "
1914 "commit offset %llu had bad time %d or length %d",
1915 c_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
1916 get_commit_trans_id(commit
), get_commit_trans_len(commit
));
1921 trans_id
= get_desc_trans_id(desc
) ;
1922 /* now we know we've got a good transaction, and it was inside the valid time ranges */
1923 log_blocks
= reiserfs_kmalloc(get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), GFP_NOFS
, p_s_sb
) ;
1924 real_blocks
= reiserfs_kmalloc(get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), GFP_NOFS
, p_s_sb
) ;
1925 if (!log_blocks
|| !real_blocks
) {
1928 reiserfs_kfree(log_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1929 reiserfs_kfree(real_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1930 reiserfs_warning(p_s_sb
, "journal-1169: kmalloc failed, unable to mount FS") ;
1933 /* get all the buffer heads */
1934 trans_half
= journal_trans_half (p_s_sb
->s_blocksize
) ;
1935 for(i
= 0 ; i
< get_desc_trans_len(desc
) ; i
++) {
1936 log_blocks
[i
] = journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + (trans_offset
+ 1 + i
) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
1937 if (i
< trans_half
) {
1938 real_blocks
[i
] = sb_getblk(p_s_sb
, le32_to_cpu(desc
->j_realblock
[i
])) ;
1940 real_blocks
[i
] = sb_getblk(p_s_sb
, le32_to_cpu(commit
->j_realblock
[i
- trans_half
])) ;
1942 if ( real_blocks
[i
]->b_blocknr
> SB_BLOCK_COUNT(p_s_sb
) ) {
1943 reiserfs_warning(p_s_sb
, "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
1946 /* make sure we don't try to replay onto log or reserved area */
1947 if (is_block_in_log_or_reserved_area(p_s_sb
, real_blocks
[i
]->b_blocknr
)) {
1948 reiserfs_warning(p_s_sb
, "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block") ;
1950 brelse_array(log_blocks
, i
) ;
1951 brelse_array(real_blocks
, i
) ;
1954 reiserfs_kfree(log_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1955 reiserfs_kfree(real_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1959 /* read in the log blocks, memcpy to the corresponding real block */
1960 ll_rw_block(READ
, get_desc_trans_len(desc
), log_blocks
) ;
1961 for (i
= 0 ; i
< get_desc_trans_len(desc
) ; i
++) {
1962 wait_on_buffer(log_blocks
[i
]) ;
1963 if (!buffer_uptodate(log_blocks
[i
])) {
1964 reiserfs_warning(p_s_sb
, "journal-1212: REPLAY FAILURE fsck required! buffer write failed") ;
1965 brelse_array(log_blocks
+ i
, get_desc_trans_len(desc
) - i
) ;
1966 brelse_array(real_blocks
, get_desc_trans_len(desc
)) ;
1969 reiserfs_kfree(log_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1970 reiserfs_kfree(real_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1973 memcpy(real_blocks
[i
]->b_data
, log_blocks
[i
]->b_data
, real_blocks
[i
]->b_size
) ;
1974 set_buffer_uptodate(real_blocks
[i
]) ;
1975 brelse(log_blocks
[i
]) ;
1977 /* flush out the real blocks */
1978 for (i
= 0 ; i
< get_desc_trans_len(desc
) ; i
++) {
1979 set_buffer_dirty(real_blocks
[i
]) ;
1980 ll_rw_block(WRITE
, 1, real_blocks
+ i
) ;
1982 for (i
= 0 ; i
< get_desc_trans_len(desc
) ; i
++) {
1983 wait_on_buffer(real_blocks
[i
]) ;
1984 if (!buffer_uptodate(real_blocks
[i
])) {
1985 reiserfs_warning(p_s_sb
, "journal-1226: REPLAY FAILURE, fsck required! buffer write failed") ;
1986 brelse_array(real_blocks
+ i
, get_desc_trans_len(desc
) - i
) ;
1989 reiserfs_kfree(log_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1990 reiserfs_kfree(real_blocks
, get_desc_trans_len(desc
) * sizeof(struct buffer_head
*), p_s_sb
) ;
1993 brelse(real_blocks
[i
]) ;
1995 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + ((trans_offset
+ get_desc_trans_len(desc
) + 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) ;
1996 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1095: setting journal "
1997 "start to offset %ld",
1998 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
)) ;
2000 /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
2001 journal
->j_start
= cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) ;
2002 journal
->j_last_flush_trans_id
= trans_id
;
2003 journal
->j_trans_id
= trans_id
+ 1;
2006 reiserfs_kfree(log_blocks
, le32_to_cpu(desc
->j_len
) * sizeof(struct buffer_head
*), p_s_sb
) ;
2007 reiserfs_kfree(real_blocks
, le32_to_cpu(desc
->j_len
) * sizeof(struct buffer_head
*), p_s_sb
) ;
2011 /* This function reads blocks starting from block and to max_block of bufsize
2012 size (but no more than BUFNR blocks at a time). This proved to improve
2013 mounting speed on self-rebuilding raid5 arrays at least.
2014 Right now it is only used from journal code. But later we might use it
2016 Note: Do not use journal_getblk/sb_getblk functions here! */
2017 static struct buffer_head
* reiserfs_breada (struct block_device
*dev
, int block
, int bufsize
,
2018 unsigned int max_block
)
2020 struct buffer_head
* bhlist
[BUFNR
];
2021 unsigned int blocks
= BUFNR
;
2022 struct buffer_head
* bh
;
2025 bh
= __getblk (dev
, block
, bufsize
);
2026 if (buffer_uptodate (bh
))
2029 if (block
+ BUFNR
> max_block
) {
2030 blocks
= max_block
- block
;
2034 for (i
= 1; i
< blocks
; i
++) {
2035 bh
= __getblk (dev
, block
+ i
, bufsize
);
2036 if (buffer_uptodate (bh
)) {
2040 else bhlist
[j
++] = bh
;
2042 ll_rw_block (READ
, j
, bhlist
);
2043 for(i
= 1; i
< j
; i
++)
2046 wait_on_buffer (bh
);
2047 if (buffer_uptodate (bh
))
2054 ** read and replay the log
2055 ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
2056 ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast.
2058 ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
2060 ** On exit, it sets things up so the first transaction will work correctly.
2062 static int journal_read(struct super_block
*p_s_sb
) {
2063 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
2064 struct reiserfs_journal_desc
*desc
;
2065 unsigned long oldest_trans_id
= 0;
2066 unsigned long oldest_invalid_trans_id
= 0 ;
2068 unsigned long oldest_start
= 0;
2069 unsigned long cur_dblock
= 0 ;
2070 unsigned long newest_mount_id
= 9 ;
2071 struct buffer_head
*d_bh
;
2072 struct reiserfs_journal_header
*jh
;
2073 int valid_journal_header
= 0 ;
2074 int replay_count
= 0 ;
2075 int continue_replay
= 1 ;
2077 char b
[BDEVNAME_SIZE
];
2079 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) ;
2080 reiserfs_info (p_s_sb
, "checking transaction log (%s)\n",
2081 bdevname(journal
->j_dev_bd
, b
));
2082 start
= get_seconds();
2084 /* step 1, read in the journal header block. Check the transaction it says
2085 ** is the first unflushed, and if that transaction is not valid,
2088 journal
->j_header_bh
= journal_bread(p_s_sb
,
2089 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2090 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2091 if (!journal
->j_header_bh
) {
2094 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
) ;
2095 if (le32_to_cpu(jh
->j_first_unflushed_offset
) >= 0 &&
2096 le32_to_cpu(jh
->j_first_unflushed_offset
) < SB_ONDISK_JOURNAL_SIZE(p_s_sb
) &&
2097 le32_to_cpu(jh
->j_last_flush_trans_id
) > 0) {
2098 oldest_start
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2099 le32_to_cpu(jh
->j_first_unflushed_offset
) ;
2100 oldest_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2101 newest_mount_id
= le32_to_cpu(jh
->j_mount_id
);
2102 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1153: found in "
2103 "header: first_unflushed_offset %d, last_flushed_trans_id "
2104 "%lu", le32_to_cpu(jh
->j_first_unflushed_offset
),
2105 le32_to_cpu(jh
->j_last_flush_trans_id
)) ;
2106 valid_journal_header
= 1 ;
2108 /* now, we try to read the first unflushed offset. If it is not valid,
2109 ** there is nothing more we can do, and it makes no sense to read
2110 ** through the whole log.
2112 d_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + le32_to_cpu(jh
->j_first_unflushed_offset
)) ;
2113 ret
= journal_transaction_is_valid(p_s_sb
, d_bh
, NULL
, NULL
) ;
2115 continue_replay
= 0 ;
2118 goto start_log_replay
;
2121 if (continue_replay
&& bdev_read_only(p_s_sb
->s_bdev
)) {
2122 reiserfs_warning (p_s_sb
,
2123 "clm-2076: device is readonly, unable to replay log") ;
2127 /* ok, there are transactions that need to be replayed. start with the first log block, find
2128 ** all the valid transactions, and pick out the oldest.
2130 while(continue_replay
&& cur_dblock
< (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) {
2131 /* Note that it is required for blocksize of primary fs device and journal
2132 device to be the same */
2133 d_bh
= reiserfs_breada(journal
->j_dev_bd
, cur_dblock
, p_s_sb
->s_blocksize
,
2134 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) ;
2135 ret
= journal_transaction_is_valid(p_s_sb
, d_bh
, &oldest_invalid_trans_id
, &newest_mount_id
) ;
2137 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2138 if (oldest_start
== 0) { /* init all oldest_ values */
2139 oldest_trans_id
= get_desc_trans_id(desc
) ;
2140 oldest_start
= d_bh
->b_blocknr
;
2141 newest_mount_id
= get_desc_mount_id(desc
) ;
2142 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1179: Setting "
2143 "oldest_start to offset %llu, trans_id %lu",
2144 oldest_start
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2146 } else if (oldest_trans_id
> get_desc_trans_id(desc
)) {
2147 /* one we just read was older */
2148 oldest_trans_id
= get_desc_trans_id(desc
) ;
2149 oldest_start
= d_bh
->b_blocknr
;
2150 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1180: Resetting "
2151 "oldest_start to offset %lu, trans_id %lu",
2152 oldest_start
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2155 if (newest_mount_id
< get_desc_mount_id(desc
)) {
2156 newest_mount_id
= get_desc_mount_id(desc
) ;
2157 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2158 "newest_mount_id to %d", get_desc_mount_id(desc
));
2160 cur_dblock
+= get_desc_trans_len(desc
) + 2 ;
2168 cur_dblock
= oldest_start
;
2169 if (oldest_trans_id
) {
2170 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1206: Starting replay "
2171 "from offset %llu, trans_id %lu",
2172 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2177 while(continue_replay
&& oldest_trans_id
> 0) {
2178 ret
= journal_read_transaction(p_s_sb
, cur_dblock
, oldest_start
, oldest_trans_id
, newest_mount_id
) ;
2181 } else if (ret
!= 0) {
2184 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + journal
->j_start
;
2186 if (cur_dblock
== oldest_start
)
2190 if (oldest_trans_id
== 0) {
2191 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1225: No valid "
2192 "transactions found") ;
2194 /* j_start does not get set correctly if we don't replay any transactions.
2195 ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
2196 ** copy the trans_id from the header
2198 if (valid_journal_header
&& replay_count
== 0) {
2199 journal
->j_start
= le32_to_cpu(jh
->j_first_unflushed_offset
) ;
2200 journal
->j_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2201 journal
->j_last_flush_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) ;
2202 journal
->j_mount_id
= le32_to_cpu(jh
->j_mount_id
) + 1;
2204 journal
->j_mount_id
= newest_mount_id
+ 1 ;
2206 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2207 "newest_mount_id to %lu", journal
->j_mount_id
) ;
2208 journal
->j_first_unflushed_offset
= journal
->j_start
;
2209 if (replay_count
> 0) {
2210 reiserfs_info (p_s_sb
, "replayed %d transactions in %lu seconds\n",
2211 replay_count
, get_seconds() - start
) ;
2213 if (!bdev_read_only(p_s_sb
->s_bdev
) &&
2214 _update_journal_header_block(p_s_sb
, journal
->j_start
,
2215 journal
->j_last_flush_trans_id
))
2217 /* replay failed, caller must call free_journal_ram and abort
2225 static struct reiserfs_journal_list
*alloc_journal_list(struct super_block
*s
)
2227 struct reiserfs_journal_list
*jl
;
2229 jl
= reiserfs_kmalloc(sizeof(struct reiserfs_journal_list
), GFP_NOFS
, s
);
2234 memset(jl
, 0, sizeof(*jl
));
2235 INIT_LIST_HEAD(&jl
->j_list
);
2236 INIT_LIST_HEAD(&jl
->j_working_list
);
2237 INIT_LIST_HEAD(&jl
->j_tail_bh_list
);
2238 INIT_LIST_HEAD(&jl
->j_bh_list
);
2239 sema_init(&jl
->j_commit_lock
, 1);
2240 SB_JOURNAL(s
)->j_num_lists
++;
2241 get_journal_list(jl
);
2245 static void journal_list_init(struct super_block
*p_s_sb
) {
2246 SB_JOURNAL(p_s_sb
)->j_current_jl
= alloc_journal_list(p_s_sb
);
2249 static int release_journal_dev( struct super_block
*super
,
2250 struct reiserfs_journal
*journal
)
2256 if( journal
-> j_dev_file
!= NULL
) {
2257 result
= filp_close( journal
-> j_dev_file
, NULL
);
2258 journal
-> j_dev_file
= NULL
;
2259 journal
-> j_dev_bd
= NULL
;
2260 } else if( journal
-> j_dev_bd
!= NULL
) {
2261 result
= blkdev_put( journal
-> j_dev_bd
);
2262 journal
-> j_dev_bd
= NULL
;
2266 reiserfs_warning(super
, "sh-457: release_journal_dev: Cannot release journal device: %i", result
);
2271 static int journal_init_dev( struct super_block
*super
,
2272 struct reiserfs_journal
*journal
,
2273 const char *jdev_name
)
2277 int blkdev_mode
= FMODE_READ
| FMODE_WRITE
;
2278 char b
[BDEVNAME_SIZE
];
2282 journal
-> j_dev_bd
= NULL
;
2283 journal
-> j_dev_file
= NULL
;
2284 jdev
= SB_ONDISK_JOURNAL_DEVICE( super
) ?
2285 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super
)) : super
->s_dev
;
2287 if (bdev_read_only(super
->s_bdev
))
2288 blkdev_mode
= FMODE_READ
;
2290 /* there is no "jdev" option and journal is on separate device */
2291 if( ( !jdev_name
|| !jdev_name
[ 0 ] ) ) {
2292 journal
->j_dev_bd
= open_by_devnum(jdev
, blkdev_mode
);
2293 if (IS_ERR(journal
->j_dev_bd
)) {
2294 result
= PTR_ERR(journal
->j_dev_bd
);
2295 journal
->j_dev_bd
= NULL
;
2296 reiserfs_warning (super
, "sh-458: journal_init_dev: "
2297 "cannot init journal device '%s': %i",
2298 __bdevname(jdev
, b
), result
);
2300 } else if (jdev
!= super
->s_dev
)
2301 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2305 journal
-> j_dev_file
= filp_open( jdev_name
, 0, 0 );
2306 if( !IS_ERR( journal
-> j_dev_file
) ) {
2307 struct inode
*jdev_inode
= journal
->j_dev_file
->f_mapping
->host
;
2308 if( !S_ISBLK( jdev_inode
-> i_mode
) ) {
2309 reiserfs_warning (super
, "journal_init_dev: '%s' is "
2310 "not a block device", jdev_name
);
2314 journal
->j_dev_bd
= I_BDEV(jdev_inode
);
2315 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2318 result
= PTR_ERR( journal
-> j_dev_file
);
2319 journal
-> j_dev_file
= NULL
;
2320 reiserfs_warning (super
,
2321 "journal_init_dev: Cannot open '%s': %i",
2322 jdev_name
, result
);
2325 release_journal_dev( super
, journal
);
2327 reiserfs_info(super
, "journal_init_dev: journal device: %s\n",
2328 bdevname(journal
->j_dev_bd
, b
));
2333 ** must be called once on fs mount. calls journal_read for you
2335 int journal_init(struct super_block
*p_s_sb
, const char * j_dev_name
, int old_format
, unsigned int commit_max_age
) {
2336 int num_cnodes
= SB_ONDISK_JOURNAL_SIZE(p_s_sb
) * 2 ;
2337 struct buffer_head
*bhjh
;
2338 struct reiserfs_super_block
* rs
;
2339 struct reiserfs_journal_header
*jh
;
2340 struct reiserfs_journal
*journal
;
2341 struct reiserfs_journal_list
*jl
;
2342 char b
[BDEVNAME_SIZE
];
2344 journal
= SB_JOURNAL(p_s_sb
) = vmalloc(sizeof (struct reiserfs_journal
)) ;
2346 reiserfs_warning (p_s_sb
, "journal-1256: unable to get memory for journal structure") ;
2349 memset(journal
, 0, sizeof(struct reiserfs_journal
)) ;
2350 INIT_LIST_HEAD(&journal
->j_bitmap_nodes
) ;
2351 INIT_LIST_HEAD (&journal
->j_prealloc_list
);
2352 INIT_LIST_HEAD(&journal
->j_working_list
);
2353 INIT_LIST_HEAD(&journal
->j_journal_list
);
2354 journal
->j_persistent_trans
= 0;
2355 if (reiserfs_allocate_list_bitmaps(p_s_sb
,
2356 journal
->j_list_bitmap
,
2357 SB_BMAP_NR(p_s_sb
)))
2358 goto free_and_return
;
2359 allocate_bitmap_nodes(p_s_sb
) ;
2361 /* reserved for journal area support */
2362 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) = (old_format
?
2363 REISERFS_OLD_DISK_OFFSET_IN_BYTES
/ p_s_sb
->s_blocksize
+
2364 SB_BMAP_NR(p_s_sb
) + 1 :
2365 REISERFS_DISK_OFFSET_IN_BYTES
/ p_s_sb
->s_blocksize
+ 2);
2367 /* Sanity check to see is the standard journal fitting withing first bitmap
2368 (actual for small blocksizes) */
2369 if ( !SB_ONDISK_JOURNAL_DEVICE( p_s_sb
) &&
2370 (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) + SB_ONDISK_JOURNAL_SIZE(p_s_sb
) > p_s_sb
->s_blocksize
* 8) ) {
2371 reiserfs_warning (p_s_sb
, "journal-1393: journal does not fit for area "
2372 "addressed by first of bitmap blocks. It starts at "
2373 "%u and its size is %u. Block size %ld",
2374 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
),
2375 SB_ONDISK_JOURNAL_SIZE(p_s_sb
), p_s_sb
->s_blocksize
);
2376 goto free_and_return
;
2379 if( journal_init_dev( p_s_sb
, journal
, j_dev_name
) != 0 ) {
2380 reiserfs_warning (p_s_sb
, "sh-462: unable to initialize jornal device");
2381 goto free_and_return
;
2384 rs
= SB_DISK_SUPER_BLOCK(p_s_sb
);
2386 /* read journal header */
2387 bhjh
= journal_bread(p_s_sb
,
2388 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2390 reiserfs_warning (p_s_sb
, "sh-459: unable to read journal header");
2391 goto free_and_return
;
2393 jh
= (struct reiserfs_journal_header
*)(bhjh
->b_data
);
2395 /* make sure that journal matches to the super block */
2396 if (is_reiserfs_jr(rs
) && (jh
->jh_journal
.jp_journal_magic
!= sb_jp_journal_magic(rs
))) {
2397 reiserfs_warning (p_s_sb
, "sh-460: journal header magic %x "
2398 "(device %s) does not match to magic found in super "
2400 jh
->jh_journal
.jp_journal_magic
,
2401 bdevname( journal
->j_dev_bd
, b
),
2402 sb_jp_journal_magic(rs
));
2404 goto free_and_return
;
2407 journal
->j_trans_max
= le32_to_cpu (jh
->jh_journal
.jp_journal_trans_max
);
2408 journal
->j_max_batch
= le32_to_cpu (jh
->jh_journal
.jp_journal_max_batch
);
2409 journal
->j_max_commit_age
= le32_to_cpu (jh
->jh_journal
.jp_journal_max_commit_age
);
2410 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
2412 if (journal
->j_trans_max
) {
2413 /* make sure these parameters are available, assign it if they are not */
2414 __u32 initial
= journal
->j_trans_max
;
2417 if (p_s_sb
->s_blocksize
< 4096)
2418 ratio
= 4096 / p_s_sb
->s_blocksize
;
2420 if (SB_ONDISK_JOURNAL_SIZE(p_s_sb
)/journal
->j_trans_max
< JOURNAL_MIN_RATIO
)
2421 journal
->j_trans_max
= SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / JOURNAL_MIN_RATIO
;
2422 if (journal
->j_trans_max
> JOURNAL_TRANS_MAX_DEFAULT
/ ratio
)
2423 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
/ ratio
;
2424 if (journal
->j_trans_max
< JOURNAL_TRANS_MIN_DEFAULT
/ ratio
)
2425 journal
->j_trans_max
= JOURNAL_TRANS_MIN_DEFAULT
/ ratio
;
2427 if (journal
->j_trans_max
!= initial
)
2428 reiserfs_warning (p_s_sb
, "sh-461: journal_init: wrong transaction max size (%u). Changed to %u",
2429 initial
, journal
->j_trans_max
);
2431 journal
->j_max_batch
= journal
->j_trans_max
*
2432 JOURNAL_MAX_BATCH_DEFAULT
/JOURNAL_TRANS_MAX_DEFAULT
;
2435 if (!journal
->j_trans_max
) {
2436 /*we have the file system was created by old version of mkreiserfs
2437 so this field contains zero value */
2438 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
;
2439 journal
->j_max_batch
= JOURNAL_MAX_BATCH_DEFAULT
;
2440 journal
->j_max_commit_age
= JOURNAL_MAX_COMMIT_AGE
;
2442 /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096
2443 trans max size is decreased proportionally */
2444 if (p_s_sb
->s_blocksize
< 4096) {
2445 journal
->j_trans_max
/= (4096 / p_s_sb
->s_blocksize
) ;
2446 journal
->j_max_batch
= (journal
->j_trans_max
) * 9 / 10 ;
2450 journal
->j_default_max_commit_age
= journal
->j_max_commit_age
;
2452 if (commit_max_age
!= 0) {
2453 journal
->j_max_commit_age
= commit_max_age
;
2454 journal
->j_max_trans_age
= commit_max_age
;
2457 reiserfs_info (p_s_sb
, "journal params: device %s, size %u, "
2458 "journal first block %u, max trans len %u, max batch %u, "
2459 "max commit age %u, max trans age %u\n",
2460 bdevname( journal
->j_dev_bd
, b
),
2461 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2462 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2463 journal
->j_trans_max
,
2464 journal
->j_max_batch
,
2465 journal
->j_max_commit_age
,
2466 journal
->j_max_trans_age
);
2470 journal
->j_list_bitmap_index
= 0 ;
2471 journal_list_init(p_s_sb
) ;
2473 memset(journal
->j_list_hash_table
, 0, JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*)) ;
2475 INIT_LIST_HEAD(&journal
->j_dirty_buffers
) ;
2476 spin_lock_init(&journal
->j_dirty_buffers_lock
) ;
2478 journal
->j_start
= 0 ;
2479 journal
->j_len
= 0 ;
2480 journal
->j_len_alloc
= 0 ;
2481 atomic_set(&(journal
->j_wcount
), 0) ;
2482 atomic_set(&(journal
->j_async_throttle
), 0) ;
2483 journal
->j_bcount
= 0 ;
2484 journal
->j_trans_start_time
= 0 ;
2485 journal
->j_last
= NULL
;
2486 journal
->j_first
= NULL
;
2487 init_waitqueue_head(&(journal
->j_join_wait
)) ;
2488 sema_init(&journal
->j_lock
, 1);
2489 sema_init(&journal
->j_flush_sem
, 1);
2491 journal
->j_trans_id
= 10 ;
2492 journal
->j_mount_id
= 10 ;
2493 journal
->j_state
= 0 ;
2494 atomic_set(&(journal
->j_jlock
), 0) ;
2495 journal
->j_cnode_free_list
= allocate_cnodes(num_cnodes
) ;
2496 journal
->j_cnode_free_orig
= journal
->j_cnode_free_list
;
2497 journal
->j_cnode_free
= journal
->j_cnode_free_list
? num_cnodes
: 0 ;
2498 journal
->j_cnode_used
= 0 ;
2499 journal
->j_must_wait
= 0 ;
2501 init_journal_hash(p_s_sb
) ;
2502 jl
= journal
->j_current_jl
;
2503 jl
->j_list_bitmap
= get_list_bitmap(p_s_sb
, jl
);
2504 if (!jl
->j_list_bitmap
) {
2505 reiserfs_warning(p_s_sb
, "journal-2005, get_list_bitmap failed for journal list 0") ;
2506 goto free_and_return
;
2508 if (journal_read(p_s_sb
) < 0) {
2509 reiserfs_warning(p_s_sb
, "Replay Failure, unable to mount") ;
2510 goto free_and_return
;
2513 reiserfs_mounted_fs_count
++ ;
2514 if (reiserfs_mounted_fs_count
<= 1)
2515 commit_wq
= create_workqueue("reiserfs");
2517 INIT_WORK(&journal
->j_work
, flush_async_commits
, p_s_sb
);
2520 free_journal_ram(p_s_sb
);
2525 ** test for a polite end of the current transaction. Used by file_write, and should
2526 ** be used by delete to make sure they don't write more than can fit inside a single
2529 int journal_transaction_should_end(struct reiserfs_transaction_handle
*th
, int new_alloc
) {
2530 struct reiserfs_journal
*journal
= SB_JOURNAL (th
->t_super
);
2531 time_t now
= get_seconds() ;
2532 /* cannot restart while nested */
2533 BUG_ON (!th
->t_trans_id
);
2534 if (th
->t_refcount
> 1)
2536 if ( journal
->j_must_wait
> 0 ||
2537 (journal
->j_len_alloc
+ new_alloc
) >= journal
->j_max_batch
||
2538 atomic_read(&(journal
->j_jlock
)) ||
2539 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
||
2540 journal
->j_cnode_free
< (journal
->j_trans_max
* 3)) {
2546 /* this must be called inside a transaction, and requires the
2547 ** kernel_lock to be held
2549 void reiserfs_block_writes(struct reiserfs_transaction_handle
*th
) {
2550 struct reiserfs_journal
*journal
= SB_JOURNAL (th
->t_super
);
2551 BUG_ON (!th
->t_trans_id
);
2552 journal
->j_must_wait
= 1 ;
2553 set_bit(J_WRITERS_BLOCKED
, &journal
->j_state
) ;
2557 /* this must be called without a transaction started, and does not
2560 void reiserfs_allow_writes(struct super_block
*s
) {
2561 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
2562 clear_bit(J_WRITERS_BLOCKED
, &journal
->j_state
) ;
2563 wake_up(&journal
->j_join_wait
) ;
2566 /* this must be called without a transaction started, and does not
2569 void reiserfs_wait_on_write_block(struct super_block
*s
) {
2570 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
2571 wait_event(journal
->j_join_wait
,
2572 !test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) ;
2575 static void queue_log_writer(struct super_block
*s
) {
2577 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
2578 set_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
2581 * we don't want to use wait_event here because
2582 * we only want to wait once.
2584 init_waitqueue_entry(&wait
, current
);
2585 add_wait_queue(&journal
->j_join_wait
, &wait
);
2586 set_current_state(TASK_UNINTERRUPTIBLE
);
2587 if (test_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2589 current
->state
= TASK_RUNNING
;
2590 remove_wait_queue(&journal
->j_join_wait
, &wait
);
2593 static void wake_queued_writers(struct super_block
*s
) {
2594 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
2595 if (test_and_clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2596 wake_up(&journal
->j_join_wait
);
2599 static void let_transaction_grow(struct super_block
*sb
,
2600 unsigned long trans_id
)
2602 struct reiserfs_journal
*journal
= SB_JOURNAL (sb
);
2603 unsigned long bcount
= journal
->j_bcount
;
2605 set_current_state(TASK_UNINTERRUPTIBLE
);
2606 schedule_timeout(1);
2607 journal
->j_current_jl
->j_state
|= LIST_COMMIT_PENDING
;
2608 while ((atomic_read(&journal
->j_wcount
) > 0 ||
2609 atomic_read(&journal
->j_jlock
)) &&
2610 journal
->j_trans_id
== trans_id
) {
2611 queue_log_writer(sb
);
2613 if (journal
->j_trans_id
!= trans_id
)
2615 if (bcount
== journal
->j_bcount
)
2617 bcount
= journal
->j_bcount
;
2621 /* join == true if you must join an existing transaction.
2622 ** join == false if you can deal with waiting for others to finish
2624 ** this will block until the transaction is joinable. send the number of blocks you
2625 ** expect to use in nblocks.
2627 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
, struct super_block
* p_s_sb
,unsigned long nblocks
,int join
) {
2628 time_t now
= get_seconds() ;
2630 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2631 struct reiserfs_transaction_handle myth
;
2632 int sched_count
= 0;
2635 reiserfs_check_lock_depth(p_s_sb
, "journal_begin") ;
2637 PROC_INFO_INC( p_s_sb
, journal
.journal_being
);
2638 /* set here for journal_join */
2640 th
->t_super
= p_s_sb
;
2643 lock_journal(p_s_sb
) ;
2644 if (join
!= JBEGIN_ABORT
&& reiserfs_is_journal_aborted (journal
)) {
2645 unlock_journal (p_s_sb
);
2646 retval
= journal
->j_errno
;
2649 journal
->j_bcount
++;
2651 if (test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) {
2652 unlock_journal(p_s_sb
) ;
2653 reiserfs_wait_on_write_block(p_s_sb
) ;
2654 PROC_INFO_INC( p_s_sb
, journal
.journal_relock_writers
);
2657 now
= get_seconds();
2659 /* if there is no room in the journal OR
2660 ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning
2661 ** we don't sleep if there aren't other writers
2664 if ( (!join
&& journal
->j_must_wait
> 0) ||
2665 ( !join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >= journal
->j_max_batch
) ||
2666 (!join
&& atomic_read(&journal
->j_wcount
) > 0 && journal
->j_trans_start_time
> 0 &&
2667 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) ||
2668 (!join
&& atomic_read(&journal
->j_jlock
)) ||
2669 (!join
&& journal
->j_cnode_free
< (journal
->j_trans_max
* 3))) {
2671 old_trans_id
= journal
->j_trans_id
;
2672 unlock_journal(p_s_sb
) ; /* allow others to finish this transaction */
2674 if (!join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >=
2675 journal
->j_max_batch
&&
2676 ((journal
->j_len
+ nblocks
+ 2) * 100) < (journal
->j_len_alloc
* 75))
2678 if (atomic_read(&journal
->j_wcount
) > 10) {
2680 queue_log_writer(p_s_sb
);
2684 /* don't mess with joining the transaction if all we have to do is
2685 * wait for someone else to do a commit
2687 if (atomic_read(&journal
->j_jlock
)) {
2688 while (journal
->j_trans_id
== old_trans_id
&&
2689 atomic_read(&journal
->j_jlock
)) {
2690 queue_log_writer(p_s_sb
);
2694 retval
= journal_join(&myth
, p_s_sb
, 1) ;
2698 /* someone might have ended the transaction while we joined */
2699 if (old_trans_id
!= journal
->j_trans_id
) {
2700 retval
= do_journal_end(&myth
, p_s_sb
, 1, 0) ;
2702 retval
= do_journal_end(&myth
, p_s_sb
, 1, COMMIT_NOW
) ;
2708 PROC_INFO_INC( p_s_sb
, journal
.journal_relock_wcount
);
2711 /* we are the first writer, set trans_id */
2712 if (journal
->j_trans_start_time
== 0) {
2713 journal
->j_trans_start_time
= get_seconds();
2715 atomic_inc(&(journal
->j_wcount
)) ;
2716 journal
->j_len_alloc
+= nblocks
;
2717 th
->t_blocks_logged
= 0 ;
2718 th
->t_blocks_allocated
= nblocks
;
2719 th
->t_trans_id
= journal
->j_trans_id
;
2720 unlock_journal(p_s_sb
) ;
2721 INIT_LIST_HEAD (&th
->t_list
);
2725 memset (th
, 0, sizeof (*th
));
2726 /* Re-set th->t_super, so we can properly keep track of how many
2727 * persistent transactions there are. We need to do this so if this
2728 * call is part of a failed restart_transaction, we can free it later */
2729 th
->t_super
= p_s_sb
;
2733 struct reiserfs_transaction_handle
*
2734 reiserfs_persistent_transaction(struct super_block
*s
, int nblocks
) {
2736 struct reiserfs_transaction_handle
*th
;
2738 /* if we're nesting into an existing transaction. It will be
2739 ** persistent on its own
2741 if (reiserfs_transaction_running(s
)) {
2742 th
= current
->journal_info
;
2744 if (th
->t_refcount
< 2) {
2749 th
= reiserfs_kmalloc(sizeof(struct reiserfs_transaction_handle
), GFP_NOFS
, s
) ;
2752 ret
= journal_begin(th
, s
, nblocks
) ;
2754 reiserfs_kfree(th
, sizeof(struct reiserfs_transaction_handle
), s
) ;
2758 SB_JOURNAL(s
)->j_persistent_trans
++;
2763 reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle
*th
) {
2764 struct super_block
*s
= th
->t_super
;
2767 ret
= journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
2770 if (th
->t_refcount
== 0) {
2771 SB_JOURNAL(s
)->j_persistent_trans
--;
2772 reiserfs_kfree(th
, sizeof(struct reiserfs_transaction_handle
), s
) ;
2777 static int journal_join(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, unsigned long nblocks
) {
2778 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
2780 /* this keeps do_journal_end from NULLing out the current->journal_info
2783 th
->t_handle_save
= cur_th
;
2784 if (cur_th
&& cur_th
->t_refcount
> 1) {
2787 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_JOIN
) ;
2790 int journal_join_abort(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, unsigned long nblocks
) {
2791 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
2793 /* this keeps do_journal_end from NULLing out the current->journal_info
2796 th
->t_handle_save
= cur_th
;
2797 if (cur_th
&& cur_th
->t_refcount
> 1) {
2800 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_ABORT
) ;
2803 int journal_begin(struct reiserfs_transaction_handle
*th
, struct super_block
* p_s_sb
, unsigned long nblocks
) {
2804 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
2807 th
->t_handle_save
= NULL
;
2809 /* we are nesting into the current transaction */
2810 if (cur_th
->t_super
== p_s_sb
) {
2811 BUG_ON (!cur_th
->t_refcount
);
2812 cur_th
->t_refcount
++ ;
2813 memcpy(th
, cur_th
, sizeof(*th
));
2814 if (th
->t_refcount
<= 1)
2815 reiserfs_warning (p_s_sb
, "BAD: refcount <= 1, but journal_info != 0");
2818 /* we've ended up with a handle from a different filesystem.
2819 ** save it and restore on journal_end. This should never
2822 reiserfs_warning(p_s_sb
, "clm-2100: nesting info a different FS") ;
2823 th
->t_handle_save
= current
->journal_info
;
2824 current
->journal_info
= th
;
2827 current
->journal_info
= th
;
2829 ret
= do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_REG
) ;
2830 if (current
->journal_info
!= th
)
2833 /* I guess this boils down to being the reciprocal of clm-2100 above.
2834 * If do_journal_begin_r fails, we need to put it back, since journal_end
2835 * won't be called to do it. */
2837 current
->journal_info
= th
->t_handle_save
;
2839 BUG_ON (!th
->t_refcount
);
2845 ** puts bh into the current transaction. If it was already there, reorders removes the
2846 ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
2848 ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the
2849 ** transaction is committed.
2851 ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
2853 int journal_mark_dirty(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, struct buffer_head
*bh
) {
2854 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
2855 struct reiserfs_journal_cnode
*cn
= NULL
;
2856 int count_already_incd
= 0 ;
2858 BUG_ON (!th
->t_trans_id
);
2860 PROC_INFO_INC( p_s_sb
, journal
.mark_dirty
);
2861 if (th
->t_trans_id
!= journal
->j_trans_id
) {
2862 reiserfs_panic(th
->t_super
, "journal-1577: handle trans id %ld != current trans id %ld\n",
2863 th
->t_trans_id
, journal
->j_trans_id
);
2868 prepared
= test_clear_buffer_journal_prepared (bh
);
2869 clear_buffer_journal_restore_dirty (bh
);
2870 /* already in this transaction, we are done */
2871 if (buffer_journaled(bh
)) {
2872 PROC_INFO_INC( p_s_sb
, journal
.mark_dirty_already
);
2876 /* this must be turned into a panic instead of a warning. We can't allow
2877 ** a dirty or journal_dirty or locked buffer to be logged, as some changes
2878 ** could get to disk too early. NOT GOOD.
2880 if (!prepared
|| buffer_dirty(bh
)) {
2881 reiserfs_warning (p_s_sb
, "journal-1777: buffer %llu bad state "
2882 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
2883 (unsigned long long)bh
->b_blocknr
, prepared
? ' ' : '!',
2884 buffer_locked(bh
) ? ' ' : '!',
2885 buffer_dirty(bh
) ? ' ' : '!',
2886 buffer_journal_dirty(bh
) ? ' ' : '!') ;
2889 if (atomic_read(&(journal
->j_wcount
)) <= 0) {
2890 reiserfs_warning (p_s_sb
, "journal-1409: journal_mark_dirty returning because j_wcount was %d", atomic_read(&(journal
->j_wcount
))) ;
2893 /* this error means I've screwed up, and we've overflowed the transaction.
2894 ** Nothing can be done here, except make the FS readonly or panic.
2896 if (journal
->j_len
>= journal
->j_trans_max
) {
2897 reiserfs_panic(th
->t_super
, "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n", journal
->j_len
) ;
2900 if (buffer_journal_dirty(bh
)) {
2901 count_already_incd
= 1 ;
2902 PROC_INFO_INC( p_s_sb
, journal
.mark_dirty_notjournal
);
2903 clear_buffer_journal_dirty (bh
);
2906 if (journal
->j_len
> journal
->j_len_alloc
) {
2907 journal
->j_len_alloc
= journal
->j_len
+ JOURNAL_PER_BALANCE_CNT
;
2910 set_buffer_journaled (bh
);
2912 /* now put this guy on the end */
2914 cn
= get_cnode(p_s_sb
) ;
2916 reiserfs_panic(p_s_sb
, "get_cnode failed!\n");
2919 if (th
->t_blocks_logged
== th
->t_blocks_allocated
) {
2920 th
->t_blocks_allocated
+= JOURNAL_PER_BALANCE_CNT
;
2921 journal
->j_len_alloc
+= JOURNAL_PER_BALANCE_CNT
;
2923 th
->t_blocks_logged
++ ;
2927 cn
->blocknr
= bh
->b_blocknr
;
2930 insert_journal_hash(journal
->j_hash_table
, cn
) ;
2931 if (!count_already_incd
) {
2936 cn
->prev
= journal
->j_last
;
2938 if (journal
->j_last
) {
2939 journal
->j_last
->next
= cn
;
2940 journal
->j_last
= cn
;
2942 journal
->j_first
= cn
;
2943 journal
->j_last
= cn
;
2948 int journal_end(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, unsigned long nblocks
) {
2949 if (!current
->journal_info
&& th
->t_refcount
> 1)
2950 reiserfs_warning (p_s_sb
, "REISER-NESTING: th NULL, refcount %d",
2953 if (!th
->t_trans_id
) {
2959 if (th
->t_refcount
> 0) {
2960 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
2962 /* we aren't allowed to close a nested transaction on a different
2963 ** filesystem from the one in the task struct
2965 if (cur_th
->t_super
!= th
->t_super
)
2969 memcpy(current
->journal_info
, th
, sizeof(*th
));
2974 return do_journal_end(th
, p_s_sb
, nblocks
, 0) ;
2978 /* removes from the current transaction, relsing and descrementing any counters.
2979 ** also files the removed buffer directly onto the clean list
2981 ** called by journal_mark_freed when a block has been deleted
2983 ** returns 1 if it cleaned and relsed the buffer. 0 otherwise
2985 static int remove_from_transaction(struct super_block
*p_s_sb
, b_blocknr_t blocknr
, int already_cleaned
) {
2986 struct buffer_head
*bh
;
2987 struct reiserfs_journal_cnode
*cn
;
2988 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
2991 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
) ;
2992 if (!cn
|| !cn
->bh
) {
2997 cn
->prev
->next
= cn
->next
;
3000 cn
->next
->prev
= cn
->prev
;
3002 if (cn
== journal
->j_first
) {
3003 journal
->j_first
= cn
->next
;
3005 if (cn
== journal
->j_last
) {
3006 journal
->j_last
= cn
->prev
;
3009 remove_journal_hash(p_s_sb
, journal
->j_hash_table
, NULL
, bh
->b_blocknr
, 0) ;
3010 clear_buffer_journaled (bh
); /* don't log this one */
3012 if (!already_cleaned
) {
3013 clear_buffer_journal_dirty (bh
);
3014 clear_buffer_dirty(bh
);
3015 clear_buffer_journal_test (bh
);
3017 if (atomic_read(&(bh
->b_count
)) < 0) {
3018 reiserfs_warning (p_s_sb
, "journal-1752: remove from trans, b_count < 0");
3023 journal
->j_len_alloc
-- ;
3024 free_cnode(p_s_sb
, cn
) ;
3029 ** for any cnode in a journal list, it can only be dirtied of all the
3030 ** transactions that include it are commited to disk.
3031 ** this checks through each transaction, and returns 1 if you are allowed to dirty,
3032 ** and 0 if you aren't
3034 ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
3035 ** blocks for a given transaction on disk
3038 static int can_dirty(struct reiserfs_journal_cnode
*cn
) {
3039 struct super_block
*sb
= cn
->sb
;
3040 b_blocknr_t blocknr
= cn
->blocknr
;
3041 struct reiserfs_journal_cnode
*cur
= cn
->hprev
;
3044 /* first test hprev. These are all newer than cn, so any node here
3045 ** with the same block number and dev means this node can't be sent
3046 ** to disk right now.
3048 while(cur
&& can_dirty
) {
3049 if (cur
->jlist
&& cur
->bh
&& cur
->blocknr
&& cur
->sb
== sb
&&
3050 cur
->blocknr
== blocknr
) {
3055 /* then test hnext. These are all older than cn. As long as they
3056 ** are committed to the log, it is safe to write cn to disk
3059 while(cur
&& can_dirty
) {
3060 if (cur
->jlist
&& cur
->jlist
->j_len
> 0 &&
3061 atomic_read(&(cur
->jlist
->j_commit_left
)) > 0 && cur
->bh
&&
3062 cur
->blocknr
&& cur
->sb
== sb
&& cur
->blocknr
== blocknr
) {
3070 /* syncs the commit blocks, but does not force the real buffers to disk
3071 ** will wait until the current transaction is done/commited before returning
3073 int journal_end_sync(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, unsigned long nblocks
) {
3074 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3076 BUG_ON (!th
->t_trans_id
);
3077 /* you can sync while nested, very, very bad */
3078 if (th
->t_refcount
> 1) {
3081 if (journal
->j_len
== 0) {
3082 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
), 1) ;
3083 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
)) ;
3085 return do_journal_end(th
, p_s_sb
, nblocks
, COMMIT_NOW
| WAIT
) ;
3089 ** writeback the pending async commits to disk
3091 static void flush_async_commits(void *p
) {
3092 struct super_block
*p_s_sb
= p
;
3093 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3094 struct reiserfs_journal_list
*jl
;
3095 struct list_head
*entry
;
3098 if (!list_empty(&journal
->j_journal_list
)) {
3099 /* last entry is the youngest, commit it and you get everything */
3100 entry
= journal
->j_journal_list
.prev
;
3101 jl
= JOURNAL_LIST_ENTRY(entry
);
3102 flush_commit_list(p_s_sb
, jl
, 1);
3106 * this is a little racey, but there's no harm in missing
3107 * the filemap_fdata_write
3109 if (!atomic_read(&journal
->j_async_throttle
) && !reiserfs_is_journal_aborted (journal
)) {
3110 atomic_inc(&journal
->j_async_throttle
);
3111 filemap_fdatawrite(p_s_sb
->s_bdev
->bd_inode
->i_mapping
);
3112 atomic_dec(&journal
->j_async_throttle
);
3117 ** flushes any old transactions to disk
3118 ** ends the current transaction if it is too old
3120 int reiserfs_flush_old_commits(struct super_block
*p_s_sb
) {
3122 struct reiserfs_transaction_handle th
;
3123 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3125 now
= get_seconds();
3126 /* safety check so we don't flush while we are replaying the log during
3129 if (list_empty(&journal
->j_journal_list
)) {
3133 /* check the current transaction. If there are no writers, and it is
3134 * too old, finish it, and force the commit blocks to disk
3136 if (atomic_read(&journal
->j_wcount
) <= 0 &&
3137 journal
->j_trans_start_time
> 0 &&
3138 journal
->j_len
> 0 &&
3139 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
)
3141 if (!journal_join(&th
, p_s_sb
, 1)) {
3142 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
), 1) ;
3143 journal_mark_dirty(&th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
)) ;
3145 /* we're only being called from kreiserfsd, it makes no sense to do
3146 ** an async commit so that kreiserfsd can do it later
3148 do_journal_end(&th
, p_s_sb
,1, COMMIT_NOW
| WAIT
) ;
3151 return p_s_sb
->s_dirt
;
3155 ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
3157 ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all
3158 ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just
3159 ** flushes the commit list and returns 0.
3161 ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait.
3163 ** Note, we can't allow the journal_end to proceed while there are still writers in the log.
3165 static int check_journal_end(struct reiserfs_transaction_handle
*th
, struct super_block
* p_s_sb
,
3166 unsigned long nblocks
, int flags
) {
3169 int flush
= flags
& FLUSH_ALL
;
3170 int commit_now
= flags
& COMMIT_NOW
;
3171 int wait_on_commit
= flags
& WAIT
;
3172 struct reiserfs_journal_list
*jl
;
3173 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3175 BUG_ON (!th
->t_trans_id
);
3177 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3178 reiserfs_panic(th
->t_super
, "journal-1577: handle trans id %ld != current trans id %ld\n",
3179 th
->t_trans_id
, journal
->j_trans_id
);
3182 journal
->j_len_alloc
-= (th
->t_blocks_allocated
- th
->t_blocks_logged
) ;
3183 if (atomic_read(&(journal
->j_wcount
)) > 0) { /* <= 0 is allowed. unmounting might not call begin */
3184 atomic_dec(&(journal
->j_wcount
)) ;
3187 /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released
3188 ** will be dealt with by next transaction that actually writes something, but should be taken
3189 ** care of in this trans
3191 if (journal
->j_len
== 0) {
3194 /* if wcount > 0, and we are called to with flush or commit_now,
3195 ** we wait on j_join_wait. We will wake up when the last writer has
3196 ** finished the transaction, and started it on its way to the disk.
3197 ** Then, we flush the commit or journal list, and just return 0
3198 ** because the rest of journal end was already done for this transaction.
3200 if (atomic_read(&(journal
->j_wcount
)) > 0) {
3201 if (flush
|| commit_now
) {
3204 jl
= journal
->j_current_jl
;
3205 trans_id
= jl
->j_trans_id
;
3207 jl
->j_state
|= LIST_COMMIT_PENDING
;
3208 atomic_set(&(journal
->j_jlock
), 1) ;
3210 journal
->j_next_full_flush
= 1 ;
3212 unlock_journal(p_s_sb
) ;
3214 /* sleep while the current transaction is still j_jlocked */
3215 while(journal
->j_trans_id
== trans_id
) {
3216 if (atomic_read(&journal
->j_jlock
)) {
3217 queue_log_writer(p_s_sb
);
3219 lock_journal(p_s_sb
);
3220 if (journal
->j_trans_id
== trans_id
) {
3221 atomic_set(&(journal
->j_jlock
), 1) ;
3223 unlock_journal(p_s_sb
);
3226 if (journal
->j_trans_id
== trans_id
) {
3229 if (commit_now
&& journal_list_still_alive(p_s_sb
, trans_id
) &&
3232 flush_commit_list(p_s_sb
, jl
, 1) ;
3236 unlock_journal(p_s_sb
) ;
3240 /* deal with old transactions where we are the last writers */
3241 now
= get_seconds();
3242 if ((now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3244 journal
->j_next_async_flush
= 1 ;
3246 /* don't batch when someone is waiting on j_join_wait */
3247 /* don't batch when syncing the commit or flushing the whole trans */
3248 if (!(journal
->j_must_wait
> 0) && !(atomic_read(&(journal
->j_jlock
))) && !flush
&& !commit_now
&&
3249 (journal
->j_len
< journal
->j_max_batch
) &&
3250 journal
->j_len_alloc
< journal
->j_max_batch
&& journal
->j_cnode_free
> (journal
->j_trans_max
* 3)) {
3251 journal
->j_bcount
++ ;
3252 unlock_journal(p_s_sb
) ;
3256 if (journal
->j_start
> SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
3257 reiserfs_panic(p_s_sb
, "journal-003: journal_end: j_start (%ld) is too high\n", journal
->j_start
) ;
3263 ** Does all the work that makes deleting blocks safe.
3264 ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
3267 ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes
3268 ** before this transaction has finished.
3270 ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with
3271 ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash,
3272 ** the block can't be reallocated yet.
3274 ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
3276 int journal_mark_freed(struct reiserfs_transaction_handle
*th
, struct super_block
*p_s_sb
, b_blocknr_t blocknr
) {
3277 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3278 struct reiserfs_journal_cnode
*cn
= NULL
;
3279 struct buffer_head
*bh
= NULL
;
3280 struct reiserfs_list_bitmap
*jb
= NULL
;
3282 BUG_ON (!th
->t_trans_id
);
3284 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3289 /* if it is journal new, we just remove it from this transaction */
3290 if (bh
&& buffer_journal_new(bh
)) {
3291 clear_buffer_journal_new (bh
);
3292 clear_prepared_bits(bh
) ;
3293 reiserfs_clean_and_file_buffer(bh
) ;
3294 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
) ;
3296 /* set the bit for this block in the journal bitmap for this transaction */
3297 jb
= journal
->j_current_jl
->j_list_bitmap
;
3299 reiserfs_panic(p_s_sb
, "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n") ;
3301 set_bit_in_list_bitmap(p_s_sb
, blocknr
, jb
) ;
3303 /* Note, the entire while loop is not allowed to schedule. */
3306 clear_prepared_bits(bh
) ;
3307 reiserfs_clean_and_file_buffer(bh
) ;
3309 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
) ;
3311 /* find all older transactions with this block, make sure they don't try to write it out */
3312 cn
= get_journal_hash_dev(p_s_sb
,journal
->j_list_hash_table
, blocknr
) ;
3314 if (p_s_sb
== cn
->sb
&& blocknr
== cn
->blocknr
) {
3315 set_bit(BLOCK_FREED
, &cn
->state
) ;
3318 /* remove_from_transaction will brelse the buffer if it was
3319 ** in the current trans
3321 clear_buffer_journal_dirty (cn
->bh
);
3322 clear_buffer_dirty(cn
->bh
);
3323 clear_buffer_journal_test(cn
->bh
);
3326 if (atomic_read(&(cn
->bh
->b_count
)) < 0) {
3327 reiserfs_warning (p_s_sb
, "journal-2138: cn->bh->b_count < 0");
3330 if (cn
->jlist
) { /* since we are clearing the bh, we MUST dec nonzerolen */
3331 atomic_dec(&(cn
->jlist
->j_nonzerolen
)) ;
3341 put_bh(bh
) ; /* get_hash grabs the buffer */
3342 if (atomic_read(&(bh
->b_count
)) < 0) {
3343 reiserfs_warning (p_s_sb
, "journal-2165: bh->b_count < 0");
3349 void reiserfs_update_inode_transaction(struct inode
*inode
) {
3350 struct reiserfs_journal
*journal
= SB_JOURNAL (inode
->i_sb
);
3351 REISERFS_I(inode
)->i_jl
= journal
->j_current_jl
;
3352 REISERFS_I(inode
)->i_trans_id
= journal
->j_trans_id
;
3356 * returns -1 on error, 0 if no commits/barriers were done and 1
3357 * if a transaction was actually committed and the barrier was done
3359 static int __commit_trans_jl(struct inode
*inode
, unsigned long id
,
3360 struct reiserfs_journal_list
*jl
)
3362 struct reiserfs_transaction_handle th
;
3363 struct super_block
*sb
= inode
->i_sb
;
3364 struct reiserfs_journal
*journal
= SB_JOURNAL (sb
);
3367 /* is it from the current transaction, or from an unknown transaction? */
3368 if (id
== journal
->j_trans_id
) {
3369 jl
= journal
->j_current_jl
;
3370 /* try to let other writers come in and grow this transaction */
3371 let_transaction_grow(sb
, id
);
3372 if (journal
->j_trans_id
!= id
) {
3373 goto flush_commit_only
;
3376 ret
= journal_begin(&th
, sb
, 1) ;
3380 /* someone might have ended this transaction while we joined */
3381 if (journal
->j_trans_id
!= id
) {
3382 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
), 1) ;
3383 journal_mark_dirty(&th
, sb
, SB_BUFFER_WITH_SB(sb
)) ;
3384 ret
= journal_end(&th
, sb
, 1) ;
3385 goto flush_commit_only
;
3388 ret
= journal_end_sync(&th
, sb
, 1) ;
3393 /* this gets tricky, we have to make sure the journal list in
3394 * the inode still exists. We know the list is still around
3395 * if we've got a larger transaction id than the oldest list
3398 if (journal_list_still_alive(inode
->i_sb
, id
)) {
3400 * we only set ret to 1 when we know for sure
3401 * the barrier hasn't been started yet on the commit
3404 if (atomic_read(&jl
->j_commit_left
) > 1)
3406 flush_commit_list(sb
, jl
, 1) ;
3407 if (journal
->j_errno
)
3408 ret
= journal
->j_errno
;
3411 /* otherwise the list is gone, and long since committed */
3415 int reiserfs_commit_for_inode(struct inode
*inode
) {
3416 unsigned long id
= REISERFS_I(inode
)->i_trans_id
;
3417 struct reiserfs_journal_list
*jl
= REISERFS_I(inode
)->i_jl
;
3419 /* for the whole inode, assume unset id means it was
3420 * changed in the current transaction. More conservative
3423 reiserfs_update_inode_transaction(inode
) ;
3424 id
= REISERFS_I(inode
)->i_trans_id
;
3425 /* jl will be updated in __commit_trans_jl */
3428 return __commit_trans_jl(inode
, id
, jl
);
3431 void reiserfs_restore_prepared_buffer(struct super_block
*p_s_sb
,
3432 struct buffer_head
*bh
) {
3433 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3434 PROC_INFO_INC( p_s_sb
, journal
.restore_prepared
);
3438 if (test_clear_buffer_journal_restore_dirty (bh
) &&
3439 buffer_journal_dirty(bh
)) {
3440 struct reiserfs_journal_cnode
*cn
;
3441 cn
= get_journal_hash_dev(p_s_sb
,
3442 journal
->j_list_hash_table
,
3444 if (cn
&& can_dirty(cn
)) {
3445 set_buffer_journal_test (bh
);
3446 mark_buffer_dirty(bh
);
3449 clear_buffer_journal_prepared (bh
);
3452 extern struct tree_balance
*cur_tb
;
3454 ** before we can change a metadata block, we have to make sure it won't
3455 ** be written to disk while we are altering it. So, we must:
3460 int reiserfs_prepare_for_journal(struct super_block
*p_s_sb
,
3461 struct buffer_head
*bh
, int wait
) {
3462 PROC_INFO_INC( p_s_sb
, journal
.prepare
);
3464 if (test_set_buffer_locked(bh
)) {
3469 set_buffer_journal_prepared (bh
);
3470 if (test_clear_buffer_dirty(bh
) && buffer_journal_dirty(bh
)) {
3471 clear_buffer_journal_test (bh
);
3472 set_buffer_journal_restore_dirty (bh
);
3478 static void flush_old_journal_lists(struct super_block
*s
) {
3479 struct reiserfs_journal
*journal
= SB_JOURNAL (s
);
3480 struct reiserfs_journal_list
*jl
;
3481 struct list_head
*entry
;
3482 time_t now
= get_seconds();
3484 while(!list_empty(&journal
->j_journal_list
)) {
3485 entry
= journal
->j_journal_list
.next
;
3486 jl
= JOURNAL_LIST_ENTRY(entry
);
3487 /* this check should always be run, to send old lists to disk */
3488 if (jl
->j_timestamp
< (now
- (JOURNAL_MAX_TRANS_AGE
* 4))) {
3489 flush_used_journal_lists(s
, jl
);
3497 ** long and ugly. If flush, will not return until all commit
3498 ** blocks and all real buffers in the trans are on disk.
3499 ** If no_async, won't return until all commit blocks are on disk.
3501 ** keep reading, there are comments as you go along
3503 ** If the journal is aborted, we just clean up. Things like flushing
3504 ** journal lists, etc just won't happen.
3506 static int do_journal_end(struct reiserfs_transaction_handle
*th
, struct super_block
* p_s_sb
, unsigned long nblocks
,
3508 struct reiserfs_journal
*journal
= SB_JOURNAL (p_s_sb
);
3509 struct reiserfs_journal_cnode
*cn
, *next
, *jl_cn
;
3510 struct reiserfs_journal_cnode
*last_cn
= NULL
;
3511 struct reiserfs_journal_desc
*desc
;
3512 struct reiserfs_journal_commit
*commit
;
3513 struct buffer_head
*c_bh
; /* commit bh */
3514 struct buffer_head
*d_bh
; /* desc bh */
3515 int cur_write_start
= 0 ; /* start index of current log write */
3518 int flush
= flags
& FLUSH_ALL
;
3519 int wait_on_commit
= flags
& WAIT
;
3520 struct reiserfs_journal_list
*jl
, *temp_jl
;
3521 struct list_head
*entry
, *safe
;
3522 unsigned long jindex
;
3523 unsigned long commit_trans_id
;
3526 BUG_ON (th
->t_refcount
> 1);
3527 BUG_ON (!th
->t_trans_id
);
3529 current
->journal_info
= th
->t_handle_save
;
3530 reiserfs_check_lock_depth(p_s_sb
, "journal end");
3531 if (journal
->j_len
== 0) {
3532 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
), 1) ;
3533 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
)) ;
3536 lock_journal(p_s_sb
) ;
3537 if (journal
->j_next_full_flush
) {
3538 flags
|= FLUSH_ALL
;
3541 if (journal
->j_next_async_flush
) {
3542 flags
|= COMMIT_NOW
| WAIT
;
3546 /* check_journal_end locks the journal, and unlocks if it does not return 1
3547 ** it tells us if we should continue with the journal_end, or just return
3549 if (!check_journal_end(th
, p_s_sb
, nblocks
, flags
)) {
3551 wake_queued_writers(p_s_sb
);
3552 reiserfs_async_progress_wait(p_s_sb
);
3556 /* check_journal_end might set these, check again */
3557 if (journal
->j_next_full_flush
) {
3562 ** j must wait means we have to flush the log blocks, and the real blocks for
3565 if (journal
->j_must_wait
> 0) {
3569 #ifdef REISERFS_PREALLOCATE
3570 /* quota ops might need to nest, setup the journal_info pointer for them */
3571 current
->journal_info
= th
;
3572 reiserfs_discard_all_prealloc(th
); /* it should not involve new blocks into
3573 * the transaction */
3574 current
->journal_info
= th
->t_handle_save
;
3577 /* setup description block */
3578 d_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + journal
->j_start
) ;
3579 set_buffer_uptodate(d_bh
);
3580 desc
= (struct reiserfs_journal_desc
*)(d_bh
)->b_data
;
3581 memset(d_bh
->b_data
, 0, d_bh
->b_size
) ;
3582 memcpy(get_journal_desc_magic (d_bh
), JOURNAL_DESC_MAGIC
, 8) ;
3583 set_desc_trans_id(desc
, journal
->j_trans_id
) ;
3585 /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */
3586 c_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3587 ((journal
->j_start
+ journal
->j_len
+ 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) ;
3588 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
3589 memset(c_bh
->b_data
, 0, c_bh
->b_size
) ;
3590 set_commit_trans_id(commit
, journal
->j_trans_id
) ;
3591 set_buffer_uptodate(c_bh
) ;
3593 /* init this journal list */
3594 jl
= journal
->j_current_jl
;
3596 /* we lock the commit before doing anything because
3597 * we want to make sure nobody tries to run flush_commit_list until
3598 * the new transaction is fully setup, and we've already flushed the
3601 down(&jl
->j_commit_lock
);
3603 /* save the transaction id in case we need to commit it later */
3604 commit_trans_id
= jl
->j_trans_id
;
3606 atomic_set(&jl
->j_older_commits_done
, 0) ;
3607 jl
->j_trans_id
= journal
->j_trans_id
;
3608 jl
->j_timestamp
= journal
->j_trans_start_time
;
3609 jl
->j_commit_bh
= c_bh
;
3610 jl
->j_start
= journal
->j_start
;
3611 jl
->j_len
= journal
->j_len
;
3612 atomic_set(&jl
->j_nonzerolen
, journal
->j_len
) ;
3613 atomic_set(&jl
->j_commit_left
, journal
->j_len
+ 2);
3614 jl
->j_realblock
= NULL
;
3616 /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
3617 ** for each real block, add it to the journal list hash,
3618 ** copy into real block index array in the commit or desc block
3620 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
3621 for (i
= 0, cn
= journal
->j_first
; cn
; cn
= cn
->next
, i
++) {
3622 if (buffer_journaled (cn
->bh
)) {
3623 jl_cn
= get_cnode(p_s_sb
) ;
3625 reiserfs_panic(p_s_sb
, "journal-1676, get_cnode returned NULL\n") ;
3628 jl
->j_realblock
= jl_cn
;
3630 jl_cn
->prev
= last_cn
;
3631 jl_cn
->next
= NULL
;
3633 last_cn
->next
= jl_cn
;
3636 /* make sure the block we are trying to log is not a block
3637 of journal or reserved area */
3639 if (is_block_in_log_or_reserved_area(p_s_sb
, cn
->bh
->b_blocknr
)) {
3640 reiserfs_panic(p_s_sb
, "journal-2332: Trying to log block %lu, which is a log block\n", cn
->bh
->b_blocknr
) ;
3642 jl_cn
->blocknr
= cn
->bh
->b_blocknr
;
3645 jl_cn
->bh
= cn
->bh
;
3647 insert_journal_hash(journal
->j_list_hash_table
, jl_cn
) ;
3648 if (i
< trans_half
) {
3649 desc
->j_realblock
[i
] = cpu_to_le32(cn
->bh
->b_blocknr
) ;
3651 commit
->j_realblock
[i
- trans_half
] = cpu_to_le32(cn
->bh
->b_blocknr
) ;
3657 set_desc_trans_len(desc
, journal
->j_len
) ;
3658 set_desc_mount_id(desc
, journal
->j_mount_id
) ;
3659 set_desc_trans_id(desc
, journal
->j_trans_id
) ;
3660 set_commit_trans_len(commit
, journal
->j_len
);
3662 /* special check in case all buffers in the journal were marked for not logging */
3663 if (journal
->j_len
== 0) {
3667 /* we're about to dirty all the log blocks, mark the description block
3668 * dirty now too. Don't mark the commit block dirty until all the
3669 * others are on disk
3671 mark_buffer_dirty(d_bh
);
3673 /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
3674 cur_write_start
= journal
->j_start
;
3675 cn
= journal
->j_first
;
3676 jindex
= 1 ; /* start at one so we don't get the desc again */
3678 clear_buffer_journal_new (cn
->bh
);
3679 /* copy all the real blocks into log area. dirty log blocks */
3680 if (buffer_journaled (cn
->bh
)) {
3681 struct buffer_head
*tmp_bh
;
3684 tmp_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3685 ((cur_write_start
+ jindex
) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) ;
3686 set_buffer_uptodate(tmp_bh
);
3687 page
= cn
->bh
->b_page
;
3689 memcpy(tmp_bh
->b_data
, addr
+ offset_in_page(cn
->bh
->b_data
),
3692 mark_buffer_dirty(tmp_bh
);
3694 set_buffer_journal_dirty (cn
->bh
);
3695 clear_buffer_journaled (cn
->bh
);
3697 /* JDirty cleared sometime during transaction. don't log this one */
3698 reiserfs_warning(p_s_sb
, "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!") ;
3702 free_cnode(p_s_sb
, cn
) ;
3707 /* we are done with both the c_bh and d_bh, but
3708 ** c_bh must be written after all other commit blocks,
3709 ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
3712 journal
->j_current_jl
= alloc_journal_list(p_s_sb
);
3714 /* now it is safe to insert this transaction on the main list */
3715 list_add_tail(&jl
->j_list
, &journal
->j_journal_list
);
3716 list_add_tail(&jl
->j_working_list
, &journal
->j_working_list
);
3717 journal
->j_num_work_lists
++;
3719 /* reset journal values for the next transaction */
3720 old_start
= journal
->j_start
;
3721 journal
->j_start
= (journal
->j_start
+ journal
->j_len
+ 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
);
3722 atomic_set(&(journal
->j_wcount
), 0) ;
3723 journal
->j_bcount
= 0 ;
3724 journal
->j_last
= NULL
;
3725 journal
->j_first
= NULL
;
3726 journal
->j_len
= 0 ;
3727 journal
->j_trans_start_time
= 0 ;
3728 journal
->j_trans_id
++ ;
3729 journal
->j_current_jl
->j_trans_id
= journal
->j_trans_id
;
3730 journal
->j_must_wait
= 0 ;
3731 journal
->j_len_alloc
= 0 ;
3732 journal
->j_next_full_flush
= 0 ;
3733 journal
->j_next_async_flush
= 0 ;
3734 init_journal_hash(p_s_sb
) ;
3736 // make sure reiserfs_add_jh sees the new current_jl before we
3737 // write out the tails
3740 /* tail conversion targets have to hit the disk before we end the
3741 * transaction. Otherwise a later transaction might repack the tail
3742 * before this transaction commits, leaving the data block unflushed and
3743 * clean, if we crash before the later transaction commits, the data block
3746 if (!list_empty(&jl
->j_tail_bh_list
)) {
3748 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
3749 journal
, jl
, &jl
->j_tail_bh_list
);
3752 if (!list_empty(&jl
->j_tail_bh_list
))
3754 up(&jl
->j_commit_lock
);
3756 /* honor the flush wishes from the caller, simple commits can
3757 ** be done outside the journal lock, they are done below
3759 ** if we don't flush the commit list right now, we put it into
3760 ** the work queue so the people waiting on the async progress work
3761 ** queue don't wait for this proc to flush journal lists and such.
3764 flush_commit_list(p_s_sb
, jl
, 1) ;
3765 flush_journal_list(p_s_sb
, jl
, 1) ;
3766 } else if (!(jl
->j_state
& LIST_COMMIT_PENDING
))
3767 queue_delayed_work(commit_wq
, &journal
->j_work
, HZ
/10);
3770 /* if the next transaction has any chance of wrapping, flush
3771 ** transactions that might get overwritten. If any journal lists are very
3772 ** old flush them as well.
3775 list_for_each_safe(entry
, safe
, &journal
->j_journal_list
) {
3776 temp_jl
= JOURNAL_LIST_ENTRY(entry
);
3777 if (journal
->j_start
<= temp_jl
->j_start
) {
3778 if ((journal
->j_start
+ journal
->j_trans_max
+ 1) >=
3781 flush_used_journal_lists(p_s_sb
, temp_jl
);
3783 } else if ((journal
->j_start
+
3784 journal
->j_trans_max
+ 1) <
3785 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))
3787 /* if we don't cross into the next transaction and we don't
3788 * wrap, there is no way we can overlap any later transactions
3793 } else if ((journal
->j_start
+
3794 journal
->j_trans_max
+ 1) >
3795 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))
3797 if (((journal
->j_start
+ journal
->j_trans_max
+ 1) %
3798 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) >= temp_jl
->j_start
)
3800 flush_used_journal_lists(p_s_sb
, temp_jl
);
3803 /* we don't overlap anything from out start to the end of the
3804 * log, and our wrapped portion doesn't overlap anything at
3805 * the start of the log. We can break
3811 flush_old_journal_lists(p_s_sb
);
3813 journal
->j_current_jl
->j_list_bitmap
= get_list_bitmap(p_s_sb
, journal
->j_current_jl
) ;
3815 if (!(journal
->j_current_jl
->j_list_bitmap
)) {
3816 reiserfs_panic(p_s_sb
, "journal-1996: do_journal_end, could not get a list bitmap\n") ;
3819 atomic_set(&(journal
->j_jlock
), 0) ;
3820 unlock_journal(p_s_sb
) ;
3821 /* wake up any body waiting to join. */
3822 clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
3823 wake_up(&(journal
->j_join_wait
)) ;
3825 if (!flush
&& wait_on_commit
&&
3826 journal_list_still_alive(p_s_sb
, commit_trans_id
)) {
3827 flush_commit_list(p_s_sb
, jl
, 1) ;
3830 reiserfs_check_lock_depth(p_s_sb
, "journal end2");
3832 memset (th
, 0, sizeof (*th
));
3833 /* Re-set th->t_super, so we can properly keep track of how many
3834 * persistent transactions there are. We need to do this so if this
3835 * call is part of a failed restart_transaction, we can free it later */
3836 th
->t_super
= p_s_sb
;
3838 return journal
->j_errno
;
3842 __reiserfs_journal_abort_hard (struct super_block
*sb
)
3844 struct reiserfs_journal
*journal
= SB_JOURNAL (sb
);
3845 if (test_bit (J_ABORTED
, &journal
->j_state
))
3848 printk (KERN_CRIT
"REISERFS: Aborting journal for filesystem on %s\n",
3849 reiserfs_bdevname (sb
));
3851 sb
->s_flags
|= MS_RDONLY
;
3852 set_bit (J_ABORTED
, &journal
->j_state
);
3854 #ifdef CONFIG_REISERFS_CHECK
3860 __reiserfs_journal_abort_soft (struct super_block
*sb
, int errno
)
3862 struct reiserfs_journal
*journal
= SB_JOURNAL (sb
);
3863 if (test_bit (J_ABORTED
, &journal
->j_state
))
3866 if (!journal
->j_errno
)
3867 journal
->j_errno
= errno
;
3869 __reiserfs_journal_abort_hard (sb
);
3873 reiserfs_journal_abort (struct super_block
*sb
, int errno
)
3875 return __reiserfs_journal_abort_soft (sb
, errno
);