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>
58 /* gets a struct reiserfs_journal_list * from a list head */
59 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
61 #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
64 /* the number of mounted filesystems. This is used to decide when to
65 ** start and kill the commit workqueue
67 static int reiserfs_mounted_fs_count
;
69 static struct workqueue_struct
*commit_wq
;
71 #define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit
73 #define BUFNR 64 /*read ahead */
75 /* cnode stat bits. Move these into reiserfs_fs.h */
77 #define BLOCK_FREED 2 /* this block was freed, and can't be written. */
78 #define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */
80 #define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */
81 #define BLOCK_DIRTIED 5
83 /* journal list state bits */
84 #define LIST_TOUCHED 1
86 #define LIST_COMMIT_PENDING 4 /* someone will commit this list */
88 /* flags for do_journal_end */
89 #define FLUSH_ALL 1 /* flush commit and real blocks */
90 #define COMMIT_NOW 2 /* end and commit this transaction */
91 #define WAIT 4 /* wait for the log blocks to hit the disk */
93 static int do_journal_end(struct reiserfs_transaction_handle
*,
94 struct super_block
*, unsigned long nblocks
,
96 static int flush_journal_list(struct super_block
*s
,
97 struct reiserfs_journal_list
*jl
, int flushall
);
98 static int flush_commit_list(struct super_block
*s
,
99 struct reiserfs_journal_list
*jl
, int flushall
);
100 static int can_dirty(struct reiserfs_journal_cnode
*cn
);
101 static int journal_join(struct reiserfs_transaction_handle
*th
,
102 struct super_block
*p_s_sb
, unsigned long nblocks
);
103 static int release_journal_dev(struct super_block
*super
,
104 struct reiserfs_journal
*journal
);
105 static int dirty_one_transaction(struct super_block
*s
,
106 struct reiserfs_journal_list
*jl
);
107 static void flush_async_commits(void *p
);
108 static void queue_log_writer(struct super_block
*s
);
110 /* values for join in do_journal_begin_r */
112 JBEGIN_REG
= 0, /* regular journal begin */
113 JBEGIN_JOIN
= 1, /* join the running transaction if at all possible */
114 JBEGIN_ABORT
= 2, /* called from cleanup code, ignores aborted flag */
117 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
118 struct super_block
*p_s_sb
,
119 unsigned long nblocks
, int join
);
121 static void init_journal_hash(struct super_block
*p_s_sb
)
123 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
124 memset(journal
->j_hash_table
, 0,
125 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
129 ** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to
130 ** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for
133 static int reiserfs_clean_and_file_buffer(struct buffer_head
*bh
)
136 clear_buffer_dirty(bh
);
137 clear_buffer_journal_test(bh
);
142 static void disable_barrier(struct super_block
*s
)
144 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_BARRIER_FLUSH
);
145 printk("reiserfs: disabling flush barriers on %s\n",
146 reiserfs_bdevname(s
));
149 static struct reiserfs_bitmap_node
*allocate_bitmap_node(struct super_block
152 struct reiserfs_bitmap_node
*bn
;
155 bn
= kmalloc(sizeof(struct reiserfs_bitmap_node
), GFP_NOFS
);
159 bn
->data
= kzalloc(p_s_sb
->s_blocksize
, GFP_NOFS
);
165 INIT_LIST_HEAD(&bn
->list
);
169 static struct reiserfs_bitmap_node
*get_bitmap_node(struct super_block
*p_s_sb
)
171 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
172 struct reiserfs_bitmap_node
*bn
= NULL
;
173 struct list_head
*entry
= journal
->j_bitmap_nodes
.next
;
175 journal
->j_used_bitmap_nodes
++;
178 if (entry
!= &journal
->j_bitmap_nodes
) {
179 bn
= list_entry(entry
, struct reiserfs_bitmap_node
, list
);
181 memset(bn
->data
, 0, p_s_sb
->s_blocksize
);
182 journal
->j_free_bitmap_nodes
--;
185 bn
= allocate_bitmap_node(p_s_sb
);
192 static inline void free_bitmap_node(struct super_block
*p_s_sb
,
193 struct reiserfs_bitmap_node
*bn
)
195 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
196 journal
->j_used_bitmap_nodes
--;
197 if (journal
->j_free_bitmap_nodes
> REISERFS_MAX_BITMAP_NODES
) {
201 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
202 journal
->j_free_bitmap_nodes
++;
206 static void allocate_bitmap_nodes(struct super_block
*p_s_sb
)
209 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
210 struct reiserfs_bitmap_node
*bn
= NULL
;
211 for (i
= 0; i
< REISERFS_MIN_BITMAP_NODES
; i
++) {
212 bn
= allocate_bitmap_node(p_s_sb
);
214 list_add(&bn
->list
, &journal
->j_bitmap_nodes
);
215 journal
->j_free_bitmap_nodes
++;
217 break; // this is ok, we'll try again when more are needed
222 static int set_bit_in_list_bitmap(struct super_block
*p_s_sb
, int block
,
223 struct reiserfs_list_bitmap
*jb
)
225 int bmap_nr
= block
/ (p_s_sb
->s_blocksize
<< 3);
226 int bit_nr
= block
% (p_s_sb
->s_blocksize
<< 3);
228 if (!jb
->bitmaps
[bmap_nr
]) {
229 jb
->bitmaps
[bmap_nr
] = get_bitmap_node(p_s_sb
);
231 set_bit(bit_nr
, (unsigned long *)jb
->bitmaps
[bmap_nr
]->data
);
235 static void cleanup_bitmap_list(struct super_block
*p_s_sb
,
236 struct reiserfs_list_bitmap
*jb
)
239 if (jb
->bitmaps
== NULL
)
242 for (i
= 0; i
< SB_BMAP_NR(p_s_sb
); i
++) {
243 if (jb
->bitmaps
[i
]) {
244 free_bitmap_node(p_s_sb
, jb
->bitmaps
[i
]);
245 jb
->bitmaps
[i
] = NULL
;
251 ** only call this on FS unmount.
253 static int free_list_bitmaps(struct super_block
*p_s_sb
,
254 struct reiserfs_list_bitmap
*jb_array
)
257 struct reiserfs_list_bitmap
*jb
;
258 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
260 jb
->journal_list
= NULL
;
261 cleanup_bitmap_list(p_s_sb
, jb
);
268 static int free_bitmap_nodes(struct super_block
*p_s_sb
)
270 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
271 struct list_head
*next
= journal
->j_bitmap_nodes
.next
;
272 struct reiserfs_bitmap_node
*bn
;
274 while (next
!= &journal
->j_bitmap_nodes
) {
275 bn
= list_entry(next
, struct reiserfs_bitmap_node
, list
);
279 next
= journal
->j_bitmap_nodes
.next
;
280 journal
->j_free_bitmap_nodes
--;
287 ** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
288 ** jb_array is the array to be filled in.
290 int reiserfs_allocate_list_bitmaps(struct super_block
*p_s_sb
,
291 struct reiserfs_list_bitmap
*jb_array
,
296 struct reiserfs_list_bitmap
*jb
;
297 int mem
= bmap_nr
* sizeof(struct reiserfs_bitmap_node
*);
299 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
301 jb
->journal_list
= NULL
;
302 jb
->bitmaps
= vmalloc(mem
);
304 reiserfs_warning(p_s_sb
,
305 "clm-2000, unable to allocate bitmaps for journal lists");
309 memset(jb
->bitmaps
, 0, mem
);
312 free_list_bitmaps(p_s_sb
, jb_array
);
319 ** find an available list bitmap. If you can't find one, flush a commit list
322 static struct reiserfs_list_bitmap
*get_list_bitmap(struct super_block
*p_s_sb
,
323 struct reiserfs_journal_list
327 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
328 struct reiserfs_list_bitmap
*jb
= NULL
;
330 for (j
= 0; j
< (JOURNAL_NUM_BITMAPS
* 3); j
++) {
331 i
= journal
->j_list_bitmap_index
;
332 journal
->j_list_bitmap_index
= (i
+ 1) % JOURNAL_NUM_BITMAPS
;
333 jb
= journal
->j_list_bitmap
+ i
;
334 if (journal
->j_list_bitmap
[i
].journal_list
) {
335 flush_commit_list(p_s_sb
,
336 journal
->j_list_bitmap
[i
].
338 if (!journal
->j_list_bitmap
[i
].journal_list
) {
345 if (jb
->journal_list
) { /* double check to make sure if flushed correctly */
348 jb
->journal_list
= jl
;
353 ** allocates a new chunk of X nodes, and links them all together as a list.
354 ** Uses the cnode->next and cnode->prev pointers
355 ** returns NULL on failure
357 static struct reiserfs_journal_cnode
*allocate_cnodes(int num_cnodes
)
359 struct reiserfs_journal_cnode
*head
;
361 if (num_cnodes
<= 0) {
364 head
= vmalloc(num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
368 memset(head
, 0, num_cnodes
* sizeof(struct reiserfs_journal_cnode
));
370 head
[0].next
= head
+ 1;
371 for (i
= 1; i
< num_cnodes
; i
++) {
372 head
[i
].prev
= head
+ (i
- 1);
373 head
[i
].next
= head
+ (i
+ 1); /* if last one, overwrite it after the if */
375 head
[num_cnodes
- 1].next
= NULL
;
380 ** pulls a cnode off the free list, or returns NULL on failure
382 static struct reiserfs_journal_cnode
*get_cnode(struct super_block
*p_s_sb
)
384 struct reiserfs_journal_cnode
*cn
;
385 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
387 reiserfs_check_lock_depth(p_s_sb
, "get_cnode");
389 if (journal
->j_cnode_free
<= 0) {
392 journal
->j_cnode_used
++;
393 journal
->j_cnode_free
--;
394 cn
= journal
->j_cnode_free_list
;
399 cn
->next
->prev
= NULL
;
401 journal
->j_cnode_free_list
= cn
->next
;
402 memset(cn
, 0, sizeof(struct reiserfs_journal_cnode
));
407 ** returns a cnode to the free list
409 static void free_cnode(struct super_block
*p_s_sb
,
410 struct reiserfs_journal_cnode
*cn
)
412 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
414 reiserfs_check_lock_depth(p_s_sb
, "free_cnode");
416 journal
->j_cnode_used
--;
417 journal
->j_cnode_free
++;
418 /* memset(cn, 0, sizeof(struct reiserfs_journal_cnode)) ; */
419 cn
->next
= journal
->j_cnode_free_list
;
420 if (journal
->j_cnode_free_list
) {
421 journal
->j_cnode_free_list
->prev
= cn
;
423 cn
->prev
= NULL
; /* not needed with the memset, but I might kill the memset, and forget to do this */
424 journal
->j_cnode_free_list
= cn
;
427 static void clear_prepared_bits(struct buffer_head
*bh
)
429 clear_buffer_journal_prepared(bh
);
430 clear_buffer_journal_restore_dirty(bh
);
433 /* utility function to force a BUG if it is called without the big
434 ** kernel lock held. caller is the string printed just before calling BUG()
436 void reiserfs_check_lock_depth(struct super_block
*sb
, char *caller
)
439 if (current
->lock_depth
< 0) {
440 reiserfs_panic(sb
, "%s called without kernel lock held",
448 /* return a cnode with same dev, block number and size in table, or null if not found */
449 static inline struct reiserfs_journal_cnode
*get_journal_hash_dev(struct
453 reiserfs_journal_cnode
457 struct reiserfs_journal_cnode
*cn
;
458 cn
= journal_hash(table
, sb
, bl
);
460 if (cn
->blocknr
== bl
&& cn
->sb
== sb
)
464 return (struct reiserfs_journal_cnode
*)0;
468 ** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated
469 ** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
470 ** being overwritten by a replay after crashing.
472 ** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting
473 ** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make
474 ** sure you never write the block without logging it.
476 ** next_zero_bit is a suggestion about the next block to try for find_forward.
477 ** when bl is rejected because it is set in a journal list bitmap, we search
478 ** for the next zero bit in the bitmap that rejected bl. Then, we return that
479 ** through next_zero_bit for find_forward to try.
481 ** Just because we return something in next_zero_bit does not mean we won't
482 ** reject it on the next call to reiserfs_in_journal
485 int reiserfs_in_journal(struct super_block
*p_s_sb
,
486 int bmap_nr
, int bit_nr
, int search_all
,
487 b_blocknr_t
* next_zero_bit
)
489 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
490 struct reiserfs_journal_cnode
*cn
;
491 struct reiserfs_list_bitmap
*jb
;
495 *next_zero_bit
= 0; /* always start this at zero. */
497 PROC_INFO_INC(p_s_sb
, journal
.in_journal
);
498 /* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
499 ** if we crash before the transaction that freed it commits, this transaction won't
500 ** have committed either, and the block will never be written
503 for (i
= 0; i
< JOURNAL_NUM_BITMAPS
; i
++) {
504 PROC_INFO_INC(p_s_sb
, journal
.in_journal_bitmap
);
505 jb
= journal
->j_list_bitmap
+ i
;
506 if (jb
->journal_list
&& jb
->bitmaps
[bmap_nr
] &&
508 (unsigned long *)jb
->bitmaps
[bmap_nr
]->
511 find_next_zero_bit((unsigned long *)
512 (jb
->bitmaps
[bmap_nr
]->
514 p_s_sb
->s_blocksize
<< 3,
521 bl
= bmap_nr
* (p_s_sb
->s_blocksize
<< 3) + bit_nr
;
522 /* is it in any old transactions? */
525 get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
, bl
))) {
529 /* is it in the current transaction. This should never happen */
530 if ((cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, bl
))) {
535 PROC_INFO_INC(p_s_sb
, journal
.in_journal_reusable
);
540 /* insert cn into table
542 static inline void insert_journal_hash(struct reiserfs_journal_cnode
**table
,
543 struct reiserfs_journal_cnode
*cn
)
545 struct reiserfs_journal_cnode
*cn_orig
;
547 cn_orig
= journal_hash(table
, cn
->sb
, cn
->blocknr
);
553 journal_hash(table
, cn
->sb
, cn
->blocknr
) = cn
;
556 /* lock the current transaction */
557 static inline void lock_journal(struct super_block
*p_s_sb
)
559 PROC_INFO_INC(p_s_sb
, journal
.lock_journal
);
560 down(&SB_JOURNAL(p_s_sb
)->j_lock
);
563 /* unlock the current transaction */
564 static inline void unlock_journal(struct super_block
*p_s_sb
)
566 up(&SB_JOURNAL(p_s_sb
)->j_lock
);
569 static inline void get_journal_list(struct reiserfs_journal_list
*jl
)
574 static inline void put_journal_list(struct super_block
*s
,
575 struct reiserfs_journal_list
*jl
)
577 if (jl
->j_refcount
< 1) {
578 reiserfs_panic(s
, "trans id %lu, refcount at %d",
579 jl
->j_trans_id
, jl
->j_refcount
);
581 if (--jl
->j_refcount
== 0)
586 ** this used to be much more involved, and I'm keeping it just in case things get ugly again.
587 ** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
590 static void cleanup_freed_for_journal_list(struct super_block
*p_s_sb
,
591 struct reiserfs_journal_list
*jl
)
594 struct reiserfs_list_bitmap
*jb
= jl
->j_list_bitmap
;
596 cleanup_bitmap_list(p_s_sb
, jb
);
598 jl
->j_list_bitmap
->journal_list
= NULL
;
599 jl
->j_list_bitmap
= NULL
;
602 static int journal_list_still_alive(struct super_block
*s
,
603 unsigned long trans_id
)
605 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
606 struct list_head
*entry
= &journal
->j_journal_list
;
607 struct reiserfs_journal_list
*jl
;
609 if (!list_empty(entry
)) {
610 jl
= JOURNAL_LIST_ENTRY(entry
->next
);
611 if (jl
->j_trans_id
<= trans_id
) {
618 static void reiserfs_end_buffer_io_sync(struct buffer_head
*bh
, int uptodate
)
620 char b
[BDEVNAME_SIZE
];
622 if (buffer_journaled(bh
)) {
623 reiserfs_warning(NULL
,
624 "clm-2084: pinned buffer %lu:%s sent to disk",
625 bh
->b_blocknr
, bdevname(bh
->b_bdev
, b
));
628 set_buffer_uptodate(bh
);
630 clear_buffer_uptodate(bh
);
635 static void reiserfs_end_ordered_io(struct buffer_head
*bh
, int uptodate
)
638 set_buffer_uptodate(bh
);
640 clear_buffer_uptodate(bh
);
645 static void submit_logged_buffer(struct buffer_head
*bh
)
648 bh
->b_end_io
= reiserfs_end_buffer_io_sync
;
649 clear_buffer_journal_new(bh
);
650 clear_buffer_dirty(bh
);
651 if (!test_clear_buffer_journal_test(bh
))
653 if (!buffer_uptodate(bh
))
655 submit_bh(WRITE
, bh
);
658 static void submit_ordered_buffer(struct buffer_head
*bh
)
661 bh
->b_end_io
= reiserfs_end_ordered_io
;
662 clear_buffer_dirty(bh
);
663 if (!buffer_uptodate(bh
))
665 submit_bh(WRITE
, bh
);
668 static int submit_barrier_buffer(struct buffer_head
*bh
)
671 bh
->b_end_io
= reiserfs_end_ordered_io
;
672 clear_buffer_dirty(bh
);
673 if (!buffer_uptodate(bh
))
675 return submit_bh(WRITE_BARRIER
, bh
);
678 static void check_barrier_completion(struct super_block
*s
,
679 struct buffer_head
*bh
)
681 if (buffer_eopnotsupp(bh
)) {
682 clear_buffer_eopnotsupp(bh
);
684 set_buffer_uptodate(bh
);
685 set_buffer_dirty(bh
);
686 sync_dirty_buffer(bh
);
690 #define CHUNK_SIZE 32
691 struct buffer_chunk
{
692 struct buffer_head
*bh
[CHUNK_SIZE
];
696 static void write_chunk(struct buffer_chunk
*chunk
)
700 for (i
= 0; i
< chunk
->nr
; i
++) {
701 submit_logged_buffer(chunk
->bh
[i
]);
707 static void write_ordered_chunk(struct buffer_chunk
*chunk
)
711 for (i
= 0; i
< chunk
->nr
; i
++) {
712 submit_ordered_buffer(chunk
->bh
[i
]);
718 static int add_to_chunk(struct buffer_chunk
*chunk
, struct buffer_head
*bh
,
719 spinlock_t
* lock
, void (fn
) (struct buffer_chunk
*))
722 if (chunk
->nr
>= CHUNK_SIZE
)
724 chunk
->bh
[chunk
->nr
++] = bh
;
725 if (chunk
->nr
>= CHUNK_SIZE
) {
736 static atomic_t nr_reiserfs_jh
= ATOMIC_INIT(0);
737 static struct reiserfs_jh
*alloc_jh(void)
739 struct reiserfs_jh
*jh
;
741 jh
= kmalloc(sizeof(*jh
), GFP_NOFS
);
743 atomic_inc(&nr_reiserfs_jh
);
751 * we want to free the jh when the buffer has been written
754 void reiserfs_free_jh(struct buffer_head
*bh
)
756 struct reiserfs_jh
*jh
;
760 bh
->b_private
= NULL
;
762 list_del_init(&jh
->list
);
764 if (atomic_read(&nr_reiserfs_jh
) <= 0)
766 atomic_dec(&nr_reiserfs_jh
);
771 static inline int __add_jh(struct reiserfs_journal
*j
, struct buffer_head
*bh
,
774 struct reiserfs_jh
*jh
;
777 spin_lock(&j
->j_dirty_buffers_lock
);
778 if (!bh
->b_private
) {
779 spin_unlock(&j
->j_dirty_buffers_lock
);
783 list_del_init(&jh
->list
);
788 spin_lock(&j
->j_dirty_buffers_lock
);
789 /* buffer must be locked for __add_jh, should be able to have
790 * two adds at the same time
797 jh
->jl
= j
->j_current_jl
;
799 list_add_tail(&jh
->list
, &jh
->jl
->j_tail_bh_list
);
801 list_add_tail(&jh
->list
, &jh
->jl
->j_bh_list
);
803 spin_unlock(&j
->j_dirty_buffers_lock
);
807 int reiserfs_add_tail_list(struct inode
*inode
, struct buffer_head
*bh
)
809 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 1);
811 int reiserfs_add_ordered_list(struct inode
*inode
, struct buffer_head
*bh
)
813 return __add_jh(SB_JOURNAL(inode
->i_sb
), bh
, 0);
816 #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
817 static int write_ordered_buffers(spinlock_t
* lock
,
818 struct reiserfs_journal
*j
,
819 struct reiserfs_journal_list
*jl
,
820 struct list_head
*list
)
822 struct buffer_head
*bh
;
823 struct reiserfs_jh
*jh
;
824 int ret
= j
->j_errno
;
825 struct buffer_chunk chunk
;
826 struct list_head tmp
;
827 INIT_LIST_HEAD(&tmp
);
831 while (!list_empty(list
)) {
832 jh
= JH_ENTRY(list
->next
);
835 if (test_set_buffer_locked(bh
)) {
836 if (!buffer_dirty(bh
)) {
837 list_del_init(&jh
->list
);
838 list_add(&jh
->list
, &tmp
);
843 write_ordered_chunk(&chunk
);
849 if (buffer_dirty(bh
)) {
850 list_del_init(&jh
->list
);
851 list_add(&jh
->list
, &tmp
);
852 add_to_chunk(&chunk
, bh
, lock
, write_ordered_chunk
);
854 reiserfs_free_jh(bh
);
859 cond_resched_lock(lock
);
863 write_ordered_chunk(&chunk
);
866 while (!list_empty(&tmp
)) {
867 jh
= JH_ENTRY(tmp
.prev
);
870 reiserfs_free_jh(bh
);
872 if (buffer_locked(bh
)) {
877 if (!buffer_uptodate(bh
)) {
880 /* ugly interaction with invalidatepage here.
881 * reiserfs_invalidate_page will pin any buffer that has a valid
882 * journal head from an older transaction. If someone else sets
883 * our buffer dirty after we write it in the first loop, and
884 * then someone truncates the page away, nobody will ever write
885 * the buffer. We're safe if we write the page one last time
886 * after freeing the journal header.
888 if (buffer_dirty(bh
) && unlikely(bh
->b_page
->mapping
== NULL
)) {
890 ll_rw_block(WRITE
, 1, &bh
);
894 cond_resched_lock(lock
);
900 static int flush_older_commits(struct super_block
*s
,
901 struct reiserfs_journal_list
*jl
)
903 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
904 struct reiserfs_journal_list
*other_jl
;
905 struct reiserfs_journal_list
*first_jl
;
906 struct list_head
*entry
;
907 unsigned long trans_id
= jl
->j_trans_id
;
908 unsigned long other_trans_id
;
909 unsigned long first_trans_id
;
913 * first we walk backwards to find the oldest uncommitted transation
916 entry
= jl
->j_list
.prev
;
918 other_jl
= JOURNAL_LIST_ENTRY(entry
);
919 if (entry
== &journal
->j_journal_list
||
920 atomic_read(&other_jl
->j_older_commits_done
))
924 entry
= other_jl
->j_list
.prev
;
927 /* if we didn't find any older uncommitted transactions, return now */
928 if (first_jl
== jl
) {
932 first_trans_id
= first_jl
->j_trans_id
;
934 entry
= &first_jl
->j_list
;
936 other_jl
= JOURNAL_LIST_ENTRY(entry
);
937 other_trans_id
= other_jl
->j_trans_id
;
939 if (other_trans_id
< trans_id
) {
940 if (atomic_read(&other_jl
->j_commit_left
) != 0) {
941 flush_commit_list(s
, other_jl
, 0);
943 /* list we were called with is gone, return */
944 if (!journal_list_still_alive(s
, trans_id
))
947 /* the one we just flushed is gone, this means all
948 * older lists are also gone, so first_jl is no longer
949 * valid either. Go back to the beginning.
951 if (!journal_list_still_alive
952 (s
, other_trans_id
)) {
957 if (entry
== &journal
->j_journal_list
)
965 int reiserfs_async_progress_wait(struct super_block
*s
)
968 struct reiserfs_journal
*j
= SB_JOURNAL(s
);
969 if (atomic_read(&j
->j_async_throttle
))
970 blk_congestion_wait(WRITE
, HZ
/ 10);
975 ** if this journal list still has commit blocks unflushed, send them to disk.
977 ** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
978 ** Before the commit block can by written, every other log block must be safely on disk
981 static int flush_commit_list(struct super_block
*s
,
982 struct reiserfs_journal_list
*jl
, int flushall
)
986 struct buffer_head
*tbh
= NULL
;
987 unsigned long trans_id
= jl
->j_trans_id
;
988 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
993 reiserfs_check_lock_depth(s
, "flush_commit_list");
995 if (atomic_read(&jl
->j_older_commits_done
)) {
1001 /* before we can put our commit blocks on disk, we have to make sure everyone older than
1002 ** us is on disk too
1004 BUG_ON(jl
->j_len
<= 0);
1005 BUG_ON(trans_id
== journal
->j_trans_id
);
1007 get_journal_list(jl
);
1009 if (flush_older_commits(s
, jl
) == 1) {
1010 /* list disappeared during flush_older_commits. return */
1015 /* make sure nobody is trying to flush this one at the same time */
1016 down(&jl
->j_commit_lock
);
1017 if (!journal_list_still_alive(s
, trans_id
)) {
1018 up(&jl
->j_commit_lock
);
1021 BUG_ON(jl
->j_trans_id
== 0);
1023 /* this commit is done, exit */
1024 if (atomic_read(&(jl
->j_commit_left
)) <= 0) {
1026 atomic_set(&(jl
->j_older_commits_done
), 1);
1028 up(&jl
->j_commit_lock
);
1032 if (!list_empty(&jl
->j_bh_list
)) {
1034 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
1035 journal
, jl
, &jl
->j_bh_list
);
1038 BUG_ON(!list_empty(&jl
->j_bh_list
));
1040 * for the description block and all the log blocks, submit any buffers
1041 * that haven't already reached the disk. Try to write at least 256
1042 * log blocks. later on, we will only wait on blocks that correspond
1043 * to this transaction, but while we're unplugging we might as well
1044 * get a chunk of data on there.
1046 atomic_inc(&journal
->j_async_throttle
);
1047 write_len
= jl
->j_len
+ 1;
1048 if (write_len
< 256)
1050 for (i
= 0 ; i
< write_len
; i
++) {
1051 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) + (jl
->j_start
+ i
) %
1052 SB_ONDISK_JOURNAL_SIZE(s
);
1053 tbh
= journal_find_get_block(s
, bn
);
1055 if (buffer_dirty(tbh
))
1056 ll_rw_block(WRITE
, 1, &tbh
) ;
1060 atomic_dec(&journal
->j_async_throttle
);
1062 /* We're skipping the commit if there's an error */
1063 if (retval
|| reiserfs_is_journal_aborted(journal
))
1066 /* wait on everything written so far before writing the commit
1067 * if we are in barrier mode, send the commit down now
1069 barrier
= reiserfs_barrier_flush(s
);
1072 lock_buffer(jl
->j_commit_bh
);
1073 ret
= submit_barrier_buffer(jl
->j_commit_bh
);
1074 if (ret
== -EOPNOTSUPP
) {
1075 set_buffer_uptodate(jl
->j_commit_bh
);
1080 for (i
= 0; i
< (jl
->j_len
+ 1); i
++) {
1081 bn
= SB_ONDISK_JOURNAL_1st_BLOCK(s
) +
1082 (jl
->j_start
+ i
) % SB_ONDISK_JOURNAL_SIZE(s
);
1083 tbh
= journal_find_get_block(s
, bn
);
1084 wait_on_buffer(tbh
);
1085 // since we're using ll_rw_blk above, it might have skipped over
1086 // a locked buffer. Double check here
1088 if (buffer_dirty(tbh
)) /* redundant, sync_dirty_buffer() checks */
1089 sync_dirty_buffer(tbh
);
1090 if (unlikely(!buffer_uptodate(tbh
))) {
1091 #ifdef CONFIG_REISERFS_CHECK
1092 reiserfs_warning(s
, "journal-601, buffer write failed");
1096 put_bh(tbh
); /* once for journal_find_get_block */
1097 put_bh(tbh
); /* once due to original getblk in do_journal_end */
1098 atomic_dec(&(jl
->j_commit_left
));
1101 BUG_ON(atomic_read(&(jl
->j_commit_left
)) != 1);
1104 /* If there was a write error in the journal - we can't commit
1105 * this transaction - it will be invalid and, if successful,
1106 * will just end up propogating the write error out to
1107 * the file system. */
1108 if (likely(!retval
&& !reiserfs_is_journal_aborted (journal
))) {
1109 if (buffer_dirty(jl
->j_commit_bh
))
1111 mark_buffer_dirty(jl
->j_commit_bh
) ;
1112 sync_dirty_buffer(jl
->j_commit_bh
) ;
1115 wait_on_buffer(jl
->j_commit_bh
);
1117 check_barrier_completion(s
, jl
->j_commit_bh
);
1119 /* If there was a write error in the journal - we can't commit this
1120 * transaction - it will be invalid and, if successful, will just end
1121 * up propogating the write error out to the filesystem. */
1122 if (unlikely(!buffer_uptodate(jl
->j_commit_bh
))) {
1123 #ifdef CONFIG_REISERFS_CHECK
1124 reiserfs_warning(s
, "journal-615: buffer write failed");
1128 bforget(jl
->j_commit_bh
);
1129 if (journal
->j_last_commit_id
!= 0 &&
1130 (jl
->j_trans_id
- journal
->j_last_commit_id
) != 1) {
1131 reiserfs_warning(s
, "clm-2200: last commit %lu, current %lu",
1132 journal
->j_last_commit_id
, jl
->j_trans_id
);
1134 journal
->j_last_commit_id
= jl
->j_trans_id
;
1136 /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */
1137 cleanup_freed_for_journal_list(s
, jl
);
1139 retval
= retval
? retval
: journal
->j_errno
;
1141 /* mark the metadata dirty */
1143 dirty_one_transaction(s
, jl
);
1144 atomic_dec(&(jl
->j_commit_left
));
1147 atomic_set(&(jl
->j_older_commits_done
), 1);
1149 up(&jl
->j_commit_lock
);
1151 put_journal_list(s
, jl
);
1154 reiserfs_abort(s
, retval
, "Journal write error in %s",
1161 ** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or
1162 ** returns NULL if it can't find anything
1164 static struct reiserfs_journal_list
*find_newer_jl_for_cn(struct
1165 reiserfs_journal_cnode
1168 struct super_block
*sb
= cn
->sb
;
1169 b_blocknr_t blocknr
= cn
->blocknr
;
1173 if (cn
->sb
== sb
&& cn
->blocknr
== blocknr
&& cn
->jlist
) {
1181 static void remove_journal_hash(struct super_block
*,
1182 struct reiserfs_journal_cnode
**,
1183 struct reiserfs_journal_list
*, unsigned long,
1187 ** once all the real blocks have been flushed, it is safe to remove them from the
1188 ** journal list for this transaction. Aside from freeing the cnode, this also allows the
1189 ** block to be reallocated for data blocks if it had been deleted.
1191 static void remove_all_from_journal_list(struct super_block
*p_s_sb
,
1192 struct reiserfs_journal_list
*jl
,
1195 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1196 struct reiserfs_journal_cnode
*cn
, *last
;
1197 cn
= jl
->j_realblock
;
1199 /* which is better, to lock once around the whole loop, or
1200 ** to lock for each call to remove_journal_hash?
1203 if (cn
->blocknr
!= 0) {
1205 reiserfs_warning(p_s_sb
,
1206 "block %u, bh is %d, state %ld",
1207 cn
->blocknr
, cn
->bh
? 1 : 0,
1211 remove_journal_hash(p_s_sb
, journal
->j_list_hash_table
,
1212 jl
, cn
->blocknr
, 1);
1216 free_cnode(p_s_sb
, last
);
1218 jl
->j_realblock
= NULL
;
1222 ** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
1223 ** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
1224 ** releasing blocks in this transaction for reuse as data blocks.
1225 ** called by flush_journal_list, before it calls remove_all_from_journal_list
1228 static int _update_journal_header_block(struct super_block
*p_s_sb
,
1229 unsigned long offset
,
1230 unsigned long trans_id
)
1232 struct reiserfs_journal_header
*jh
;
1233 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1235 if (reiserfs_is_journal_aborted(journal
))
1238 if (trans_id
>= journal
->j_last_flush_trans_id
) {
1239 if (buffer_locked((journal
->j_header_bh
))) {
1240 wait_on_buffer((journal
->j_header_bh
));
1241 if (unlikely(!buffer_uptodate(journal
->j_header_bh
))) {
1242 #ifdef CONFIG_REISERFS_CHECK
1243 reiserfs_warning(p_s_sb
,
1244 "journal-699: buffer write failed");
1249 journal
->j_last_flush_trans_id
= trans_id
;
1250 journal
->j_first_unflushed_offset
= offset
;
1251 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->
1253 jh
->j_last_flush_trans_id
= cpu_to_le32(trans_id
);
1254 jh
->j_first_unflushed_offset
= cpu_to_le32(offset
);
1255 jh
->j_mount_id
= cpu_to_le32(journal
->j_mount_id
);
1257 if (reiserfs_barrier_flush(p_s_sb
)) {
1259 lock_buffer(journal
->j_header_bh
);
1260 ret
= submit_barrier_buffer(journal
->j_header_bh
);
1261 if (ret
== -EOPNOTSUPP
) {
1262 set_buffer_uptodate(journal
->j_header_bh
);
1263 disable_barrier(p_s_sb
);
1266 wait_on_buffer(journal
->j_header_bh
);
1267 check_barrier_completion(p_s_sb
, journal
->j_header_bh
);
1270 set_buffer_dirty(journal
->j_header_bh
);
1271 sync_dirty_buffer(journal
->j_header_bh
);
1273 if (!buffer_uptodate(journal
->j_header_bh
)) {
1274 reiserfs_warning(p_s_sb
,
1275 "journal-837: IO error during journal replay");
1282 static int update_journal_header_block(struct super_block
*p_s_sb
,
1283 unsigned long offset
,
1284 unsigned long trans_id
)
1286 return _update_journal_header_block(p_s_sb
, offset
, trans_id
);
1290 ** flush any and all journal lists older than you are
1291 ** can only be called from flush_journal_list
1293 static int flush_older_journal_lists(struct super_block
*p_s_sb
,
1294 struct reiserfs_journal_list
*jl
)
1296 struct list_head
*entry
;
1297 struct reiserfs_journal_list
*other_jl
;
1298 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1299 unsigned long trans_id
= jl
->j_trans_id
;
1301 /* we know we are the only ones flushing things, no extra race
1302 * protection is required.
1305 entry
= journal
->j_journal_list
.next
;
1307 if (entry
== &journal
->j_journal_list
)
1309 other_jl
= JOURNAL_LIST_ENTRY(entry
);
1310 if (other_jl
->j_trans_id
< trans_id
) {
1311 BUG_ON(other_jl
->j_refcount
<= 0);
1312 /* do not flush all */
1313 flush_journal_list(p_s_sb
, other_jl
, 0);
1315 /* other_jl is now deleted from the list */
1321 static void del_from_work_list(struct super_block
*s
,
1322 struct reiserfs_journal_list
*jl
)
1324 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1325 if (!list_empty(&jl
->j_working_list
)) {
1326 list_del_init(&jl
->j_working_list
);
1327 journal
->j_num_work_lists
--;
1331 /* flush a journal list, both commit and real blocks
1333 ** always set flushall to 1, unless you are calling from inside
1334 ** flush_journal_list
1336 ** IMPORTANT. This can only be called while there are no journal writers,
1337 ** and the journal is locked. That means it can only be called from
1338 ** do_journal_end, or by journal_release
1340 static int flush_journal_list(struct super_block
*s
,
1341 struct reiserfs_journal_list
*jl
, int flushall
)
1343 struct reiserfs_journal_list
*pjl
;
1344 struct reiserfs_journal_cnode
*cn
, *last
;
1348 struct buffer_head
*saved_bh
;
1349 unsigned long j_len_saved
= jl
->j_len
;
1350 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1353 BUG_ON(j_len_saved
<= 0);
1355 if (atomic_read(&journal
->j_wcount
) != 0) {
1357 "clm-2048: flush_journal_list called with wcount %d",
1358 atomic_read(&journal
->j_wcount
));
1360 BUG_ON(jl
->j_trans_id
== 0);
1362 /* if flushall == 0, the lock is already held */
1364 down(&journal
->j_flush_sem
);
1365 } else if (!down_trylock(&journal
->j_flush_sem
)) {
1370 if (j_len_saved
> journal
->j_trans_max
) {
1372 "journal-715: flush_journal_list, length is %lu, trans id %lu\n",
1373 j_len_saved
, jl
->j_trans_id
);
1379 /* if all the work is already done, get out of here */
1380 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1381 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1382 goto flush_older_and_return
;
1385 /* start by putting the commit list on disk. This will also flush
1386 ** the commit lists of any olders transactions
1388 flush_commit_list(s
, jl
, 1);
1390 if (!(jl
->j_state
& LIST_DIRTY
)
1391 && !reiserfs_is_journal_aborted(journal
))
1394 /* are we done now? */
1395 if (atomic_read(&(jl
->j_nonzerolen
)) <= 0 &&
1396 atomic_read(&(jl
->j_commit_left
)) <= 0) {
1397 goto flush_older_and_return
;
1400 /* loop through each cnode, see if we need to write it,
1401 ** or wait on a more recent transaction, or just ignore it
1403 if (atomic_read(&(journal
->j_wcount
)) != 0) {
1405 "journal-844: panic journal list is flushing, wcount is not 0\n");
1407 cn
= jl
->j_realblock
;
1412 /* blocknr of 0 is no longer in the hash, ignore it */
1413 if (cn
->blocknr
== 0) {
1417 /* This transaction failed commit. Don't write out to the disk */
1418 if (!(jl
->j_state
& LIST_DIRTY
))
1421 pjl
= find_newer_jl_for_cn(cn
);
1422 /* the order is important here. We check pjl to make sure we
1423 ** don't clear BH_JDirty_wait if we aren't the one writing this
1426 if (!pjl
&& cn
->bh
) {
1429 /* we do this to make sure nobody releases the buffer while
1430 ** we are working with it
1434 if (buffer_journal_dirty(saved_bh
)) {
1435 BUG_ON(!can_dirty(cn
));
1438 } else if (can_dirty(cn
)) {
1439 /* everything with !pjl && jwait should be writable */
1444 /* if someone has this block in a newer transaction, just make
1445 ** sure they are commited, and don't try writing it to disk
1448 if (atomic_read(&pjl
->j_commit_left
))
1449 flush_commit_list(s
, pjl
, 1);
1453 /* bh == NULL when the block got to disk on its own, OR,
1454 ** the block got freed in a future transaction
1456 if (saved_bh
== NULL
) {
1460 /* this should never happen. kupdate_one_transaction has this list
1461 ** locked while it works, so we should never see a buffer here that
1462 ** is not marked JDirty_wait
1464 if ((!was_jwait
) && !buffer_locked(saved_bh
)) {
1466 "journal-813: BAD! buffer %llu %cdirty %cjwait, "
1467 "not in a newer tranasction",
1468 (unsigned long long)saved_bh
->
1469 b_blocknr
, was_dirty
? ' ' : '!',
1470 was_jwait
? ' ' : '!');
1473 /* we inc again because saved_bh gets decremented at free_cnode */
1475 set_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
);
1476 lock_buffer(saved_bh
);
1477 BUG_ON(cn
->blocknr
!= saved_bh
->b_blocknr
);
1478 if (buffer_dirty(saved_bh
))
1479 submit_logged_buffer(saved_bh
);
1481 unlock_buffer(saved_bh
);
1485 "clm-2082: Unable to flush buffer %llu in %s",
1486 (unsigned long long)saved_bh
->
1487 b_blocknr
, __FUNCTION__
);
1493 /* we incremented this to keep others from taking the buffer head away */
1495 if (atomic_read(&(saved_bh
->b_count
)) < 0) {
1497 "journal-945: saved_bh->b_count < 0");
1502 cn
= jl
->j_realblock
;
1504 if (test_bit(BLOCK_NEEDS_FLUSH
, &cn
->state
)) {
1507 "journal-1011: cn->bh is NULL\n");
1509 wait_on_buffer(cn
->bh
);
1512 "journal-1012: cn->bh is NULL\n");
1514 if (unlikely(!buffer_uptodate(cn
->bh
))) {
1515 #ifdef CONFIG_REISERFS_CHECK
1517 "journal-949: buffer write failed\n");
1521 /* note, we must clear the JDirty_wait bit after the up to date
1522 ** check, otherwise we race against our flushpage routine
1524 BUG_ON(!test_clear_buffer_journal_dirty
1527 /* undo the inc from journal_mark_dirty */
1536 reiserfs_abort(s
, -EIO
,
1537 "Write error while pushing transaction to disk in %s",
1539 flush_older_and_return
:
1541 /* before we can update the journal header block, we _must_ flush all
1542 ** real blocks from all older transactions to disk. This is because
1543 ** once the header block is updated, this transaction will not be
1544 ** replayed after a crash
1547 flush_older_journal_lists(s
, jl
);
1550 err
= journal
->j_errno
;
1551 /* before we can remove everything from the hash tables for this
1552 ** transaction, we must make sure it can never be replayed
1554 ** since we are only called from do_journal_end, we know for sure there
1555 ** are no allocations going on while we are flushing journal lists. So,
1556 ** we only need to update the journal header block for the last list
1559 if (!err
&& flushall
) {
1561 update_journal_header_block(s
,
1562 (jl
->j_start
+ jl
->j_len
+
1563 2) % SB_ONDISK_JOURNAL_SIZE(s
),
1566 reiserfs_abort(s
, -EIO
,
1567 "Write error while updating journal header in %s",
1570 remove_all_from_journal_list(s
, jl
, 0);
1571 list_del_init(&jl
->j_list
);
1572 journal
->j_num_lists
--;
1573 del_from_work_list(s
, jl
);
1575 if (journal
->j_last_flush_id
!= 0 &&
1576 (jl
->j_trans_id
- journal
->j_last_flush_id
) != 1) {
1577 reiserfs_warning(s
, "clm-2201: last flush %lu, current %lu",
1578 journal
->j_last_flush_id
, jl
->j_trans_id
);
1580 journal
->j_last_flush_id
= jl
->j_trans_id
;
1582 /* not strictly required since we are freeing the list, but it should
1583 * help find code using dead lists later on
1586 atomic_set(&(jl
->j_nonzerolen
), 0);
1588 jl
->j_realblock
= NULL
;
1589 jl
->j_commit_bh
= NULL
;
1592 put_journal_list(s
, jl
);
1594 up(&journal
->j_flush_sem
);
1599 static int write_one_transaction(struct super_block
*s
,
1600 struct reiserfs_journal_list
*jl
,
1601 struct buffer_chunk
*chunk
)
1603 struct reiserfs_journal_cnode
*cn
;
1606 jl
->j_state
|= LIST_TOUCHED
;
1607 del_from_work_list(s
, jl
);
1608 if (jl
->j_len
== 0 || atomic_read(&jl
->j_nonzerolen
) == 0) {
1612 cn
= jl
->j_realblock
;
1614 /* if the blocknr == 0, this has been cleared from the hash,
1617 if (cn
->blocknr
== 0) {
1620 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(cn
->bh
)) {
1621 struct buffer_head
*tmp_bh
;
1622 /* we can race against journal_mark_freed when we try
1623 * to lock_buffer(cn->bh), so we have to inc the buffer
1624 * count, and recheck things after locking
1628 lock_buffer(tmp_bh
);
1629 if (cn
->bh
&& can_dirty(cn
) && buffer_dirty(tmp_bh
)) {
1630 if (!buffer_journal_dirty(tmp_bh
) ||
1631 buffer_journal_prepared(tmp_bh
))
1633 add_to_chunk(chunk
, tmp_bh
, NULL
, write_chunk
);
1636 /* note, cn->bh might be null now */
1637 unlock_buffer(tmp_bh
);
1648 /* used by flush_commit_list */
1649 static int dirty_one_transaction(struct super_block
*s
,
1650 struct reiserfs_journal_list
*jl
)
1652 struct reiserfs_journal_cnode
*cn
;
1653 struct reiserfs_journal_list
*pjl
;
1656 jl
->j_state
|= LIST_DIRTY
;
1657 cn
= jl
->j_realblock
;
1659 /* look for a more recent transaction that logged this
1660 ** buffer. Only the most recent transaction with a buffer in
1661 ** it is allowed to send that buffer to disk
1663 pjl
= find_newer_jl_for_cn(cn
);
1664 if (!pjl
&& cn
->blocknr
&& cn
->bh
1665 && buffer_journal_dirty(cn
->bh
)) {
1666 BUG_ON(!can_dirty(cn
));
1667 /* if the buffer is prepared, it will either be logged
1668 * or restored. If restored, we need to make sure
1669 * it actually gets marked dirty
1671 clear_buffer_journal_new(cn
->bh
);
1672 if (buffer_journal_prepared(cn
->bh
)) {
1673 set_buffer_journal_restore_dirty(cn
->bh
);
1675 set_buffer_journal_test(cn
->bh
);
1676 mark_buffer_dirty(cn
->bh
);
1684 static int kupdate_transactions(struct super_block
*s
,
1685 struct reiserfs_journal_list
*jl
,
1686 struct reiserfs_journal_list
**next_jl
,
1687 unsigned long *next_trans_id
,
1688 int num_blocks
, int num_trans
)
1692 int transactions_flushed
= 0;
1693 unsigned long orig_trans_id
= jl
->j_trans_id
;
1694 struct buffer_chunk chunk
;
1695 struct list_head
*entry
;
1696 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1699 down(&journal
->j_flush_sem
);
1700 if (!journal_list_still_alive(s
, orig_trans_id
)) {
1704 /* we've got j_flush_sem held, nobody is going to delete any
1705 * of these lists out from underneath us
1707 while ((num_trans
&& transactions_flushed
< num_trans
) ||
1708 (!num_trans
&& written
< num_blocks
)) {
1710 if (jl
->j_len
== 0 || (jl
->j_state
& LIST_TOUCHED
) ||
1711 atomic_read(&jl
->j_commit_left
)
1712 || !(jl
->j_state
& LIST_DIRTY
)) {
1713 del_from_work_list(s
, jl
);
1716 ret
= write_one_transaction(s
, jl
, &chunk
);
1720 transactions_flushed
++;
1722 entry
= jl
->j_list
.next
;
1725 if (entry
== &journal
->j_journal_list
) {
1728 jl
= JOURNAL_LIST_ENTRY(entry
);
1730 /* don't bother with older transactions */
1731 if (jl
->j_trans_id
<= orig_trans_id
)
1735 write_chunk(&chunk
);
1739 up(&journal
->j_flush_sem
);
1743 /* for o_sync and fsync heavy applications, they tend to use
1744 ** all the journa list slots with tiny transactions. These
1745 ** trigger lots and lots of calls to update the header block, which
1746 ** adds seeks and slows things down.
1748 ** This function tries to clear out a large chunk of the journal lists
1749 ** at once, which makes everything faster since only the newest journal
1750 ** list updates the header block
1752 static int flush_used_journal_lists(struct super_block
*s
,
1753 struct reiserfs_journal_list
*jl
)
1755 unsigned long len
= 0;
1756 unsigned long cur_len
;
1760 struct reiserfs_journal_list
*tjl
;
1761 struct reiserfs_journal_list
*flush_jl
;
1762 unsigned long trans_id
;
1763 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1765 flush_jl
= tjl
= jl
;
1767 /* in data logging mode, try harder to flush a lot of blocks */
1768 if (reiserfs_data_log(s
))
1770 /* flush for 256 transactions or limit blocks, whichever comes first */
1771 for (i
= 0; i
< 256 && len
< limit
; i
++) {
1772 if (atomic_read(&tjl
->j_commit_left
) ||
1773 tjl
->j_trans_id
< jl
->j_trans_id
) {
1776 cur_len
= atomic_read(&tjl
->j_nonzerolen
);
1778 tjl
->j_state
&= ~LIST_TOUCHED
;
1782 if (tjl
->j_list
.next
== &journal
->j_journal_list
)
1784 tjl
= JOURNAL_LIST_ENTRY(tjl
->j_list
.next
);
1786 /* try to find a group of blocks we can flush across all the
1787 ** transactions, but only bother if we've actually spanned
1788 ** across multiple lists
1790 if (flush_jl
!= jl
) {
1791 ret
= kupdate_transactions(s
, jl
, &tjl
, &trans_id
, len
, i
);
1793 flush_journal_list(s
, flush_jl
, 1);
1798 ** removes any nodes in table with name block and dev as bh.
1799 ** only touchs the hnext and hprev pointers.
1801 void remove_journal_hash(struct super_block
*sb
,
1802 struct reiserfs_journal_cnode
**table
,
1803 struct reiserfs_journal_list
*jl
,
1804 unsigned long block
, int remove_freed
)
1806 struct reiserfs_journal_cnode
*cur
;
1807 struct reiserfs_journal_cnode
**head
;
1809 head
= &(journal_hash(table
, sb
, block
));
1815 if (cur
->blocknr
== block
&& cur
->sb
== sb
1816 && (jl
== NULL
|| jl
== cur
->jlist
)
1817 && (!test_bit(BLOCK_FREED
, &cur
->state
) || remove_freed
)) {
1819 cur
->hnext
->hprev
= cur
->hprev
;
1822 cur
->hprev
->hnext
= cur
->hnext
;
1829 if (cur
->bh
&& cur
->jlist
) /* anybody who clears the cur->bh will also dec the nonzerolen */
1830 atomic_dec(&(cur
->jlist
->j_nonzerolen
));
1838 static void free_journal_ram(struct super_block
*p_s_sb
)
1840 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1841 kfree(journal
->j_current_jl
);
1842 journal
->j_num_lists
--;
1844 vfree(journal
->j_cnode_free_orig
);
1845 free_list_bitmaps(p_s_sb
, journal
->j_list_bitmap
);
1846 free_bitmap_nodes(p_s_sb
); /* must be after free_list_bitmaps */
1847 if (journal
->j_header_bh
) {
1848 brelse(journal
->j_header_bh
);
1850 /* j_header_bh is on the journal dev, make sure not to release the journal
1851 * dev until we brelse j_header_bh
1853 release_journal_dev(p_s_sb
, journal
);
1858 ** call on unmount. Only set error to 1 if you haven't made your way out
1859 ** of read_super() yet. Any other caller must keep error at 0.
1861 static int do_journal_release(struct reiserfs_transaction_handle
*th
,
1862 struct super_block
*p_s_sb
, int error
)
1864 struct reiserfs_transaction_handle myth
;
1866 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
1868 /* we only want to flush out transactions if we were called with error == 0
1870 if (!error
&& !(p_s_sb
->s_flags
& MS_RDONLY
)) {
1871 /* end the current trans */
1872 BUG_ON(!th
->t_trans_id
);
1873 do_journal_end(th
, p_s_sb
, 10, FLUSH_ALL
);
1875 /* make sure something gets logged to force our way into the flush code */
1876 if (!journal_join(&myth
, p_s_sb
, 1)) {
1877 reiserfs_prepare_for_journal(p_s_sb
,
1878 SB_BUFFER_WITH_SB(p_s_sb
),
1880 journal_mark_dirty(&myth
, p_s_sb
,
1881 SB_BUFFER_WITH_SB(p_s_sb
));
1882 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1887 /* this also catches errors during the do_journal_end above */
1888 if (!error
&& reiserfs_is_journal_aborted(journal
)) {
1889 memset(&myth
, 0, sizeof(myth
));
1890 if (!journal_join_abort(&myth
, p_s_sb
, 1)) {
1891 reiserfs_prepare_for_journal(p_s_sb
,
1892 SB_BUFFER_WITH_SB(p_s_sb
),
1894 journal_mark_dirty(&myth
, p_s_sb
,
1895 SB_BUFFER_WITH_SB(p_s_sb
));
1896 do_journal_end(&myth
, p_s_sb
, 1, FLUSH_ALL
);
1900 reiserfs_mounted_fs_count
--;
1901 /* wait for all commits to finish */
1902 cancel_delayed_work(&SB_JOURNAL(p_s_sb
)->j_work
);
1903 flush_workqueue(commit_wq
);
1904 if (!reiserfs_mounted_fs_count
) {
1905 destroy_workqueue(commit_wq
);
1909 free_journal_ram(p_s_sb
);
1915 ** call on unmount. flush all journal trans, release all alloc'd ram
1917 int journal_release(struct reiserfs_transaction_handle
*th
,
1918 struct super_block
*p_s_sb
)
1920 return do_journal_release(th
, p_s_sb
, 0);
1924 ** only call from an error condition inside reiserfs_read_super!
1926 int journal_release_error(struct reiserfs_transaction_handle
*th
,
1927 struct super_block
*p_s_sb
)
1929 return do_journal_release(th
, p_s_sb
, 1);
1932 /* compares description block with commit block. returns 1 if they differ, 0 if they are the same */
1933 static int journal_compare_desc_commit(struct super_block
*p_s_sb
,
1934 struct reiserfs_journal_desc
*desc
,
1935 struct reiserfs_journal_commit
*commit
)
1937 if (get_commit_trans_id(commit
) != get_desc_trans_id(desc
) ||
1938 get_commit_trans_len(commit
) != get_desc_trans_len(desc
) ||
1939 get_commit_trans_len(commit
) > SB_JOURNAL(p_s_sb
)->j_trans_max
||
1940 get_commit_trans_len(commit
) <= 0) {
1946 /* returns 0 if it did not find a description block
1947 ** returns -1 if it found a corrupt commit block
1948 ** returns 1 if both desc and commit were valid
1950 static int journal_transaction_is_valid(struct super_block
*p_s_sb
,
1951 struct buffer_head
*d_bh
,
1952 unsigned long *oldest_invalid_trans_id
,
1953 unsigned long *newest_mount_id
)
1955 struct reiserfs_journal_desc
*desc
;
1956 struct reiserfs_journal_commit
*commit
;
1957 struct buffer_head
*c_bh
;
1958 unsigned long offset
;
1963 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
1964 if (get_desc_trans_len(desc
) > 0
1965 && !memcmp(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8)) {
1966 if (oldest_invalid_trans_id
&& *oldest_invalid_trans_id
1967 && get_desc_trans_id(desc
) > *oldest_invalid_trans_id
) {
1968 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
1969 "journal-986: transaction "
1970 "is valid returning because trans_id %d is greater than "
1971 "oldest_invalid %lu",
1972 get_desc_trans_id(desc
),
1973 *oldest_invalid_trans_id
);
1977 && *newest_mount_id
> get_desc_mount_id(desc
)) {
1978 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
1979 "journal-1087: transaction "
1980 "is valid returning because mount_id %d is less than "
1981 "newest_mount_id %lu",
1982 get_desc_mount_id(desc
),
1986 if (get_desc_trans_len(desc
) > SB_JOURNAL(p_s_sb
)->j_trans_max
) {
1987 reiserfs_warning(p_s_sb
,
1988 "journal-2018: Bad transaction length %d encountered, ignoring transaction",
1989 get_desc_trans_len(desc
));
1992 offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
1994 /* ok, we have a journal description block, lets see if the transaction was valid */
1996 journal_bread(p_s_sb
,
1997 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
1998 ((offset
+ get_desc_trans_len(desc
) +
1999 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2002 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2003 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2004 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2005 "journal_transaction_is_valid, commit offset %ld had bad "
2006 "time %d or length %d",
2008 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2009 get_commit_trans_id(commit
),
2010 get_commit_trans_len(commit
));
2012 if (oldest_invalid_trans_id
) {
2013 *oldest_invalid_trans_id
=
2014 get_desc_trans_id(desc
);
2015 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2017 "transaction_is_valid setting oldest invalid trans_id "
2019 get_desc_trans_id(desc
));
2024 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2025 "journal-1006: found valid "
2026 "transaction start offset %llu, len %d id %d",
2028 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2029 get_desc_trans_len(desc
),
2030 get_desc_trans_id(desc
));
2037 static void brelse_array(struct buffer_head
**heads
, int num
)
2040 for (i
= 0; i
< num
; i
++) {
2046 ** given the start, and values for the oldest acceptable transactions,
2047 ** this either reads in a replays a transaction, or returns because the transaction
2048 ** is invalid, or too old.
2050 static int journal_read_transaction(struct super_block
*p_s_sb
,
2051 unsigned long cur_dblock
,
2052 unsigned long oldest_start
,
2053 unsigned long oldest_trans_id
,
2054 unsigned long newest_mount_id
)
2056 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2057 struct reiserfs_journal_desc
*desc
;
2058 struct reiserfs_journal_commit
*commit
;
2059 unsigned long trans_id
= 0;
2060 struct buffer_head
*c_bh
;
2061 struct buffer_head
*d_bh
;
2062 struct buffer_head
**log_blocks
= NULL
;
2063 struct buffer_head
**real_blocks
= NULL
;
2064 unsigned long trans_offset
;
2068 d_bh
= journal_bread(p_s_sb
, cur_dblock
);
2071 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2072 trans_offset
= d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2073 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1037: "
2074 "journal_read_transaction, offset %llu, len %d mount_id %d",
2075 d_bh
->b_blocknr
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2076 get_desc_trans_len(desc
), get_desc_mount_id(desc
));
2077 if (get_desc_trans_id(desc
) < oldest_trans_id
) {
2078 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1039: "
2079 "journal_read_trans skipping because %lu is too old",
2081 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2085 if (get_desc_mount_id(desc
) != newest_mount_id
) {
2086 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1146: "
2087 "journal_read_trans skipping because %d is != "
2088 "newest_mount_id %lu", get_desc_mount_id(desc
),
2093 c_bh
= journal_bread(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2094 ((trans_offset
+ get_desc_trans_len(desc
) + 1) %
2095 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
2100 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
2101 if (journal_compare_desc_commit(p_s_sb
, desc
, commit
)) {
2102 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2103 "journal_read_transaction, "
2104 "commit offset %llu had bad time %d or length %d",
2106 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2107 get_commit_trans_id(commit
),
2108 get_commit_trans_len(commit
));
2113 trans_id
= get_desc_trans_id(desc
);
2114 /* now we know we've got a good transaction, and it was inside the valid time ranges */
2115 log_blocks
= kmalloc(get_desc_trans_len(desc
) *
2116 sizeof(struct buffer_head
*), GFP_NOFS
);
2117 real_blocks
= kmalloc(get_desc_trans_len(desc
) *
2118 sizeof(struct buffer_head
*), GFP_NOFS
);
2119 if (!log_blocks
|| !real_blocks
) {
2124 reiserfs_warning(p_s_sb
,
2125 "journal-1169: kmalloc failed, unable to mount FS");
2128 /* get all the buffer heads */
2129 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
2130 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2132 journal_getblk(p_s_sb
,
2133 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2135 i
) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2136 if (i
< trans_half
) {
2139 le32_to_cpu(desc
->j_realblock
[i
]));
2143 le32_to_cpu(commit
->
2144 j_realblock
[i
- trans_half
]));
2146 if (real_blocks
[i
]->b_blocknr
> SB_BLOCK_COUNT(p_s_sb
)) {
2147 reiserfs_warning(p_s_sb
,
2148 "journal-1207: REPLAY FAILURE fsck required! Block to replay is outside of filesystem");
2151 /* make sure we don't try to replay onto log or reserved area */
2152 if (is_block_in_log_or_reserved_area
2153 (p_s_sb
, real_blocks
[i
]->b_blocknr
)) {
2154 reiserfs_warning(p_s_sb
,
2155 "journal-1204: REPLAY FAILURE fsck required! Trying to replay onto a log block");
2157 brelse_array(log_blocks
, i
);
2158 brelse_array(real_blocks
, i
);
2166 /* read in the log blocks, memcpy to the corresponding real block */
2167 ll_rw_block(READ
, get_desc_trans_len(desc
), log_blocks
);
2168 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2169 wait_on_buffer(log_blocks
[i
]);
2170 if (!buffer_uptodate(log_blocks
[i
])) {
2171 reiserfs_warning(p_s_sb
,
2172 "journal-1212: REPLAY FAILURE fsck required! buffer write failed");
2173 brelse_array(log_blocks
+ i
,
2174 get_desc_trans_len(desc
) - i
);
2175 brelse_array(real_blocks
, get_desc_trans_len(desc
));
2182 memcpy(real_blocks
[i
]->b_data
, log_blocks
[i
]->b_data
,
2183 real_blocks
[i
]->b_size
);
2184 set_buffer_uptodate(real_blocks
[i
]);
2185 brelse(log_blocks
[i
]);
2187 /* flush out the real blocks */
2188 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2189 set_buffer_dirty(real_blocks
[i
]);
2190 ll_rw_block(SWRITE
, 1, real_blocks
+ i
);
2192 for (i
= 0; i
< get_desc_trans_len(desc
); i
++) {
2193 wait_on_buffer(real_blocks
[i
]);
2194 if (!buffer_uptodate(real_blocks
[i
])) {
2195 reiserfs_warning(p_s_sb
,
2196 "journal-1226: REPLAY FAILURE, fsck required! buffer write failed");
2197 brelse_array(real_blocks
+ i
,
2198 get_desc_trans_len(desc
) - i
);
2205 brelse(real_blocks
[i
]);
2208 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2209 ((trans_offset
+ get_desc_trans_len(desc
) +
2210 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2211 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2212 "journal-1095: setting journal " "start to offset %ld",
2213 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
));
2215 /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
2216 journal
->j_start
= cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2217 journal
->j_last_flush_trans_id
= trans_id
;
2218 journal
->j_trans_id
= trans_id
+ 1;
2226 /* This function reads blocks starting from block and to max_block of bufsize
2227 size (but no more than BUFNR blocks at a time). This proved to improve
2228 mounting speed on self-rebuilding raid5 arrays at least.
2229 Right now it is only used from journal code. But later we might use it
2231 Note: Do not use journal_getblk/sb_getblk functions here! */
2232 static struct buffer_head
*reiserfs_breada(struct block_device
*dev
, int block
,
2233 int bufsize
, unsigned int max_block
)
2235 struct buffer_head
*bhlist
[BUFNR
];
2236 unsigned int blocks
= BUFNR
;
2237 struct buffer_head
*bh
;
2240 bh
= __getblk(dev
, block
, bufsize
);
2241 if (buffer_uptodate(bh
))
2244 if (block
+ BUFNR
> max_block
) {
2245 blocks
= max_block
- block
;
2249 for (i
= 1; i
< blocks
; i
++) {
2250 bh
= __getblk(dev
, block
+ i
, bufsize
);
2251 if (buffer_uptodate(bh
)) {
2257 ll_rw_block(READ
, j
, bhlist
);
2258 for (i
= 1; i
< j
; i
++)
2262 if (buffer_uptodate(bh
))
2269 ** read and replay the log
2270 ** on a clean unmount, the journal header's next unflushed pointer will be to an invalid
2271 ** transaction. This tests that before finding all the transactions in the log, which makes normal mount times fast.
2273 ** After a crash, this starts with the next unflushed transaction, and replays until it finds one too old, or invalid.
2275 ** On exit, it sets things up so the first transaction will work correctly.
2277 static int journal_read(struct super_block
*p_s_sb
)
2279 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2280 struct reiserfs_journal_desc
*desc
;
2281 unsigned long oldest_trans_id
= 0;
2282 unsigned long oldest_invalid_trans_id
= 0;
2284 unsigned long oldest_start
= 0;
2285 unsigned long cur_dblock
= 0;
2286 unsigned long newest_mount_id
= 9;
2287 struct buffer_head
*d_bh
;
2288 struct reiserfs_journal_header
*jh
;
2289 int valid_journal_header
= 0;
2290 int replay_count
= 0;
2291 int continue_replay
= 1;
2293 char b
[BDEVNAME_SIZE
];
2295 cur_dblock
= SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
);
2296 reiserfs_info(p_s_sb
, "checking transaction log (%s)\n",
2297 bdevname(journal
->j_dev_bd
, b
));
2298 start
= get_seconds();
2300 /* step 1, read in the journal header block. Check the transaction it says
2301 ** is the first unflushed, and if that transaction is not valid,
2304 journal
->j_header_bh
= journal_bread(p_s_sb
,
2305 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
)
2306 + SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2307 if (!journal
->j_header_bh
) {
2310 jh
= (struct reiserfs_journal_header
*)(journal
->j_header_bh
->b_data
);
2311 if (le32_to_cpu(jh
->j_first_unflushed_offset
) >= 0 &&
2312 le32_to_cpu(jh
->j_first_unflushed_offset
) <
2313 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)
2314 && le32_to_cpu(jh
->j_last_flush_trans_id
) > 0) {
2316 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2317 le32_to_cpu(jh
->j_first_unflushed_offset
);
2318 oldest_trans_id
= le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2319 newest_mount_id
= le32_to_cpu(jh
->j_mount_id
);
2320 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2321 "journal-1153: found in "
2322 "header: first_unflushed_offset %d, last_flushed_trans_id "
2323 "%lu", le32_to_cpu(jh
->j_first_unflushed_offset
),
2324 le32_to_cpu(jh
->j_last_flush_trans_id
));
2325 valid_journal_header
= 1;
2327 /* now, we try to read the first unflushed offset. If it is not valid,
2328 ** there is nothing more we can do, and it makes no sense to read
2329 ** through the whole log.
2332 journal_bread(p_s_sb
,
2333 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2334 le32_to_cpu(jh
->j_first_unflushed_offset
));
2335 ret
= journal_transaction_is_valid(p_s_sb
, d_bh
, NULL
, NULL
);
2337 continue_replay
= 0;
2340 goto start_log_replay
;
2343 if (continue_replay
&& bdev_read_only(p_s_sb
->s_bdev
)) {
2344 reiserfs_warning(p_s_sb
,
2345 "clm-2076: device is readonly, unable to replay log");
2349 /* ok, there are transactions that need to be replayed. start with the first log block, find
2350 ** all the valid transactions, and pick out the oldest.
2352 while (continue_replay
2354 (SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2355 SB_ONDISK_JOURNAL_SIZE(p_s_sb
))) {
2356 /* Note that it is required for blocksize of primary fs device and journal
2357 device to be the same */
2359 reiserfs_breada(journal
->j_dev_bd
, cur_dblock
,
2360 p_s_sb
->s_blocksize
,
2361 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2362 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2364 journal_transaction_is_valid(p_s_sb
, d_bh
,
2365 &oldest_invalid_trans_id
,
2368 desc
= (struct reiserfs_journal_desc
*)d_bh
->b_data
;
2369 if (oldest_start
== 0) { /* init all oldest_ values */
2370 oldest_trans_id
= get_desc_trans_id(desc
);
2371 oldest_start
= d_bh
->b_blocknr
;
2372 newest_mount_id
= get_desc_mount_id(desc
);
2373 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2374 "journal-1179: Setting "
2375 "oldest_start to offset %llu, trans_id %lu",
2377 SB_ONDISK_JOURNAL_1st_BLOCK
2378 (p_s_sb
), oldest_trans_id
);
2379 } else if (oldest_trans_id
> get_desc_trans_id(desc
)) {
2380 /* one we just read was older */
2381 oldest_trans_id
= get_desc_trans_id(desc
);
2382 oldest_start
= d_bh
->b_blocknr
;
2383 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2384 "journal-1180: Resetting "
2385 "oldest_start to offset %lu, trans_id %lu",
2387 SB_ONDISK_JOURNAL_1st_BLOCK
2388 (p_s_sb
), oldest_trans_id
);
2390 if (newest_mount_id
< get_desc_mount_id(desc
)) {
2391 newest_mount_id
= get_desc_mount_id(desc
);
2392 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2393 "journal-1299: Setting "
2394 "newest_mount_id to %d",
2395 get_desc_mount_id(desc
));
2397 cur_dblock
+= get_desc_trans_len(desc
) + 2;
2405 cur_dblock
= oldest_start
;
2406 if (oldest_trans_id
) {
2407 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2408 "journal-1206: Starting replay "
2409 "from offset %llu, trans_id %lu",
2410 cur_dblock
- SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2415 while (continue_replay
&& oldest_trans_id
> 0) {
2417 journal_read_transaction(p_s_sb
, cur_dblock
, oldest_start
,
2418 oldest_trans_id
, newest_mount_id
);
2421 } else if (ret
!= 0) {
2425 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) + journal
->j_start
;
2427 if (cur_dblock
== oldest_start
)
2431 if (oldest_trans_id
== 0) {
2432 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
,
2433 "journal-1225: No valid " "transactions found");
2435 /* j_start does not get set correctly if we don't replay any transactions.
2436 ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
2437 ** copy the trans_id from the header
2439 if (valid_journal_header
&& replay_count
== 0) {
2440 journal
->j_start
= le32_to_cpu(jh
->j_first_unflushed_offset
);
2441 journal
->j_trans_id
=
2442 le32_to_cpu(jh
->j_last_flush_trans_id
) + 1;
2443 journal
->j_last_flush_trans_id
=
2444 le32_to_cpu(jh
->j_last_flush_trans_id
);
2445 journal
->j_mount_id
= le32_to_cpu(jh
->j_mount_id
) + 1;
2447 journal
->j_mount_id
= newest_mount_id
+ 1;
2449 reiserfs_debug(p_s_sb
, REISERFS_DEBUG_CODE
, "journal-1299: Setting "
2450 "newest_mount_id to %lu", journal
->j_mount_id
);
2451 journal
->j_first_unflushed_offset
= journal
->j_start
;
2452 if (replay_count
> 0) {
2453 reiserfs_info(p_s_sb
,
2454 "replayed %d transactions in %lu seconds\n",
2455 replay_count
, get_seconds() - start
);
2457 if (!bdev_read_only(p_s_sb
->s_bdev
) &&
2458 _update_journal_header_block(p_s_sb
, journal
->j_start
,
2459 journal
->j_last_flush_trans_id
)) {
2460 /* replay failed, caller must call free_journal_ram and abort
2468 static struct reiserfs_journal_list
*alloc_journal_list(struct super_block
*s
)
2470 struct reiserfs_journal_list
*jl
;
2471 jl
= kzalloc(sizeof(struct reiserfs_journal_list
),
2472 GFP_NOFS
| __GFP_NOFAIL
);
2473 INIT_LIST_HEAD(&jl
->j_list
);
2474 INIT_LIST_HEAD(&jl
->j_working_list
);
2475 INIT_LIST_HEAD(&jl
->j_tail_bh_list
);
2476 INIT_LIST_HEAD(&jl
->j_bh_list
);
2477 sema_init(&jl
->j_commit_lock
, 1);
2478 SB_JOURNAL(s
)->j_num_lists
++;
2479 get_journal_list(jl
);
2483 static void journal_list_init(struct super_block
*p_s_sb
)
2485 SB_JOURNAL(p_s_sb
)->j_current_jl
= alloc_journal_list(p_s_sb
);
2488 static int release_journal_dev(struct super_block
*super
,
2489 struct reiserfs_journal
*journal
)
2495 if (journal
->j_dev_file
!= NULL
) {
2496 result
= filp_close(journal
->j_dev_file
, NULL
);
2497 journal
->j_dev_file
= NULL
;
2498 journal
->j_dev_bd
= NULL
;
2499 } else if (journal
->j_dev_bd
!= NULL
) {
2500 result
= blkdev_put(journal
->j_dev_bd
);
2501 journal
->j_dev_bd
= NULL
;
2505 reiserfs_warning(super
,
2506 "sh-457: release_journal_dev: Cannot release journal device: %i",
2512 static int journal_init_dev(struct super_block
*super
,
2513 struct reiserfs_journal
*journal
,
2514 const char *jdev_name
)
2518 int blkdev_mode
= FMODE_READ
| FMODE_WRITE
;
2519 char b
[BDEVNAME_SIZE
];
2523 journal
->j_dev_bd
= NULL
;
2524 journal
->j_dev_file
= NULL
;
2525 jdev
= SB_ONDISK_JOURNAL_DEVICE(super
) ?
2526 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super
)) : super
->s_dev
;
2528 if (bdev_read_only(super
->s_bdev
))
2529 blkdev_mode
= FMODE_READ
;
2531 /* there is no "jdev" option and journal is on separate device */
2532 if ((!jdev_name
|| !jdev_name
[0])) {
2533 journal
->j_dev_bd
= open_by_devnum(jdev
, blkdev_mode
);
2534 if (IS_ERR(journal
->j_dev_bd
)) {
2535 result
= PTR_ERR(journal
->j_dev_bd
);
2536 journal
->j_dev_bd
= NULL
;
2537 reiserfs_warning(super
, "sh-458: journal_init_dev: "
2538 "cannot init journal device '%s': %i",
2539 __bdevname(jdev
, b
), result
);
2541 } else if (jdev
!= super
->s_dev
)
2542 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2546 journal
->j_dev_file
= filp_open(jdev_name
, 0, 0);
2547 if (!IS_ERR(journal
->j_dev_file
)) {
2548 struct inode
*jdev_inode
= journal
->j_dev_file
->f_mapping
->host
;
2549 if (!S_ISBLK(jdev_inode
->i_mode
)) {
2550 reiserfs_warning(super
, "journal_init_dev: '%s' is "
2551 "not a block device", jdev_name
);
2553 release_journal_dev(super
, journal
);
2556 journal
->j_dev_bd
= I_BDEV(jdev_inode
);
2557 set_blocksize(journal
->j_dev_bd
, super
->s_blocksize
);
2558 reiserfs_info(super
,
2559 "journal_init_dev: journal device: %s\n",
2560 bdevname(journal
->j_dev_bd
, b
));
2563 result
= PTR_ERR(journal
->j_dev_file
);
2564 journal
->j_dev_file
= NULL
;
2565 reiserfs_warning(super
,
2566 "journal_init_dev: Cannot open '%s': %i",
2573 ** must be called once on fs mount. calls journal_read for you
2575 int journal_init(struct super_block
*p_s_sb
, const char *j_dev_name
,
2576 int old_format
, unsigned int commit_max_age
)
2578 int num_cnodes
= SB_ONDISK_JOURNAL_SIZE(p_s_sb
) * 2;
2579 struct buffer_head
*bhjh
;
2580 struct reiserfs_super_block
*rs
;
2581 struct reiserfs_journal_header
*jh
;
2582 struct reiserfs_journal
*journal
;
2583 struct reiserfs_journal_list
*jl
;
2584 char b
[BDEVNAME_SIZE
];
2586 journal
= SB_JOURNAL(p_s_sb
) = vmalloc(sizeof(struct reiserfs_journal
));
2588 reiserfs_warning(p_s_sb
,
2589 "journal-1256: unable to get memory for journal structure");
2592 memset(journal
, 0, sizeof(struct reiserfs_journal
));
2593 INIT_LIST_HEAD(&journal
->j_bitmap_nodes
);
2594 INIT_LIST_HEAD(&journal
->j_prealloc_list
);
2595 INIT_LIST_HEAD(&journal
->j_working_list
);
2596 INIT_LIST_HEAD(&journal
->j_journal_list
);
2597 journal
->j_persistent_trans
= 0;
2598 if (reiserfs_allocate_list_bitmaps(p_s_sb
,
2599 journal
->j_list_bitmap
,
2600 SB_BMAP_NR(p_s_sb
)))
2601 goto free_and_return
;
2602 allocate_bitmap_nodes(p_s_sb
);
2604 /* reserved for journal area support */
2605 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) = (old_format
?
2606 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2607 / p_s_sb
->s_blocksize
+
2608 SB_BMAP_NR(p_s_sb
) +
2610 REISERFS_DISK_OFFSET_IN_BYTES
/
2611 p_s_sb
->s_blocksize
+ 2);
2613 /* Sanity check to see is the standard journal fitting withing first bitmap
2614 (actual for small blocksizes) */
2615 if (!SB_ONDISK_JOURNAL_DEVICE(p_s_sb
) &&
2616 (SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
) +
2617 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) > p_s_sb
->s_blocksize
* 8)) {
2618 reiserfs_warning(p_s_sb
,
2619 "journal-1393: journal does not fit for area "
2620 "addressed by first of bitmap blocks. It starts at "
2621 "%u and its size is %u. Block size %ld",
2622 SB_JOURNAL_1st_RESERVED_BLOCK(p_s_sb
),
2623 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2624 p_s_sb
->s_blocksize
);
2625 goto free_and_return
;
2628 if (journal_init_dev(p_s_sb
, journal
, j_dev_name
) != 0) {
2629 reiserfs_warning(p_s_sb
,
2630 "sh-462: unable to initialize jornal device");
2631 goto free_and_return
;
2634 rs
= SB_DISK_SUPER_BLOCK(p_s_sb
);
2636 /* read journal header */
2637 bhjh
= journal_bread(p_s_sb
,
2638 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
2639 SB_ONDISK_JOURNAL_SIZE(p_s_sb
));
2641 reiserfs_warning(p_s_sb
,
2642 "sh-459: unable to read journal header");
2643 goto free_and_return
;
2645 jh
= (struct reiserfs_journal_header
*)(bhjh
->b_data
);
2647 /* make sure that journal matches to the super block */
2648 if (is_reiserfs_jr(rs
)
2649 && (le32_to_cpu(jh
->jh_journal
.jp_journal_magic
) !=
2650 sb_jp_journal_magic(rs
))) {
2651 reiserfs_warning(p_s_sb
,
2652 "sh-460: journal header magic %x "
2653 "(device %s) does not match to magic found in super "
2654 "block %x", jh
->jh_journal
.jp_journal_magic
,
2655 bdevname(journal
->j_dev_bd
, b
),
2656 sb_jp_journal_magic(rs
));
2658 goto free_and_return
;
2661 journal
->j_trans_max
= le32_to_cpu(jh
->jh_journal
.jp_journal_trans_max
);
2662 journal
->j_max_batch
= le32_to_cpu(jh
->jh_journal
.jp_journal_max_batch
);
2663 journal
->j_max_commit_age
=
2664 le32_to_cpu(jh
->jh_journal
.jp_journal_max_commit_age
);
2665 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
2667 if (journal
->j_trans_max
) {
2668 /* make sure these parameters are available, assign it if they are not */
2669 __u32 initial
= journal
->j_trans_max
;
2672 if (p_s_sb
->s_blocksize
< 4096)
2673 ratio
= 4096 / p_s_sb
->s_blocksize
;
2675 if (SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / journal
->j_trans_max
<
2677 journal
->j_trans_max
=
2678 SB_ONDISK_JOURNAL_SIZE(p_s_sb
) / JOURNAL_MIN_RATIO
;
2679 if (journal
->j_trans_max
> JOURNAL_TRANS_MAX_DEFAULT
/ ratio
)
2680 journal
->j_trans_max
=
2681 JOURNAL_TRANS_MAX_DEFAULT
/ ratio
;
2682 if (journal
->j_trans_max
< JOURNAL_TRANS_MIN_DEFAULT
/ ratio
)
2683 journal
->j_trans_max
=
2684 JOURNAL_TRANS_MIN_DEFAULT
/ ratio
;
2686 if (journal
->j_trans_max
!= initial
)
2687 reiserfs_warning(p_s_sb
,
2688 "sh-461: journal_init: wrong transaction max size (%u). Changed to %u",
2689 initial
, journal
->j_trans_max
);
2691 journal
->j_max_batch
= journal
->j_trans_max
*
2692 JOURNAL_MAX_BATCH_DEFAULT
/ JOURNAL_TRANS_MAX_DEFAULT
;
2695 if (!journal
->j_trans_max
) {
2696 /*we have the file system was created by old version of mkreiserfs
2697 so this field contains zero value */
2698 journal
->j_trans_max
= JOURNAL_TRANS_MAX_DEFAULT
;
2699 journal
->j_max_batch
= JOURNAL_MAX_BATCH_DEFAULT
;
2700 journal
->j_max_commit_age
= JOURNAL_MAX_COMMIT_AGE
;
2702 /* for blocksize >= 4096 - max transaction size is 1024. For block size < 4096
2703 trans max size is decreased proportionally */
2704 if (p_s_sb
->s_blocksize
< 4096) {
2705 journal
->j_trans_max
/= (4096 / p_s_sb
->s_blocksize
);
2706 journal
->j_max_batch
= (journal
->j_trans_max
) * 9 / 10;
2710 journal
->j_default_max_commit_age
= journal
->j_max_commit_age
;
2712 if (commit_max_age
!= 0) {
2713 journal
->j_max_commit_age
= commit_max_age
;
2714 journal
->j_max_trans_age
= commit_max_age
;
2717 reiserfs_info(p_s_sb
, "journal params: device %s, size %u, "
2718 "journal first block %u, max trans len %u, max batch %u, "
2719 "max commit age %u, max trans age %u\n",
2720 bdevname(journal
->j_dev_bd
, b
),
2721 SB_ONDISK_JOURNAL_SIZE(p_s_sb
),
2722 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
),
2723 journal
->j_trans_max
,
2724 journal
->j_max_batch
,
2725 journal
->j_max_commit_age
, journal
->j_max_trans_age
);
2729 journal
->j_list_bitmap_index
= 0;
2730 journal_list_init(p_s_sb
);
2732 memset(journal
->j_list_hash_table
, 0,
2733 JOURNAL_HASH_SIZE
* sizeof(struct reiserfs_journal_cnode
*));
2735 INIT_LIST_HEAD(&journal
->j_dirty_buffers
);
2736 spin_lock_init(&journal
->j_dirty_buffers_lock
);
2738 journal
->j_start
= 0;
2740 journal
->j_len_alloc
= 0;
2741 atomic_set(&(journal
->j_wcount
), 0);
2742 atomic_set(&(journal
->j_async_throttle
), 0);
2743 journal
->j_bcount
= 0;
2744 journal
->j_trans_start_time
= 0;
2745 journal
->j_last
= NULL
;
2746 journal
->j_first
= NULL
;
2747 init_waitqueue_head(&(journal
->j_join_wait
));
2748 sema_init(&journal
->j_lock
, 1);
2749 sema_init(&journal
->j_flush_sem
, 1);
2751 journal
->j_trans_id
= 10;
2752 journal
->j_mount_id
= 10;
2753 journal
->j_state
= 0;
2754 atomic_set(&(journal
->j_jlock
), 0);
2755 journal
->j_cnode_free_list
= allocate_cnodes(num_cnodes
);
2756 journal
->j_cnode_free_orig
= journal
->j_cnode_free_list
;
2757 journal
->j_cnode_free
= journal
->j_cnode_free_list
? num_cnodes
: 0;
2758 journal
->j_cnode_used
= 0;
2759 journal
->j_must_wait
= 0;
2761 if (journal
->j_cnode_free
== 0) {
2762 reiserfs_warning(p_s_sb
, "journal-2004: Journal cnode memory "
2763 "allocation failed (%ld bytes). Journal is "
2764 "too large for available memory. Usually "
2765 "this is due to a journal that is too large.",
2766 sizeof (struct reiserfs_journal_cnode
) * num_cnodes
);
2767 goto free_and_return
;
2770 init_journal_hash(p_s_sb
);
2771 jl
= journal
->j_current_jl
;
2772 jl
->j_list_bitmap
= get_list_bitmap(p_s_sb
, jl
);
2773 if (!jl
->j_list_bitmap
) {
2774 reiserfs_warning(p_s_sb
,
2775 "journal-2005, get_list_bitmap failed for journal list 0");
2776 goto free_and_return
;
2778 if (journal_read(p_s_sb
) < 0) {
2779 reiserfs_warning(p_s_sb
, "Replay Failure, unable to mount");
2780 goto free_and_return
;
2783 reiserfs_mounted_fs_count
++;
2784 if (reiserfs_mounted_fs_count
<= 1)
2785 commit_wq
= create_workqueue("reiserfs");
2787 INIT_WORK(&journal
->j_work
, flush_async_commits
, p_s_sb
);
2790 free_journal_ram(p_s_sb
);
2795 ** test for a polite end of the current transaction. Used by file_write, and should
2796 ** be used by delete to make sure they don't write more than can fit inside a single
2799 int journal_transaction_should_end(struct reiserfs_transaction_handle
*th
,
2802 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2803 time_t now
= get_seconds();
2804 /* cannot restart while nested */
2805 BUG_ON(!th
->t_trans_id
);
2806 if (th
->t_refcount
> 1)
2808 if (journal
->j_must_wait
> 0 ||
2809 (journal
->j_len_alloc
+ new_alloc
) >= journal
->j_max_batch
||
2810 atomic_read(&(journal
->j_jlock
)) ||
2811 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
||
2812 journal
->j_cnode_free
< (journal
->j_trans_max
* 3)) {
2818 /* this must be called inside a transaction, and requires the
2819 ** kernel_lock to be held
2821 void reiserfs_block_writes(struct reiserfs_transaction_handle
*th
)
2823 struct reiserfs_journal
*journal
= SB_JOURNAL(th
->t_super
);
2824 BUG_ON(!th
->t_trans_id
);
2825 journal
->j_must_wait
= 1;
2826 set_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2830 /* this must be called without a transaction started, and does not
2833 void reiserfs_allow_writes(struct super_block
*s
)
2835 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2836 clear_bit(J_WRITERS_BLOCKED
, &journal
->j_state
);
2837 wake_up(&journal
->j_join_wait
);
2840 /* this must be called without a transaction started, and does not
2843 void reiserfs_wait_on_write_block(struct super_block
*s
)
2845 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2846 wait_event(journal
->j_join_wait
,
2847 !test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
));
2850 static void queue_log_writer(struct super_block
*s
)
2853 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2854 set_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
2857 * we don't want to use wait_event here because
2858 * we only want to wait once.
2860 init_waitqueue_entry(&wait
, current
);
2861 add_wait_queue(&journal
->j_join_wait
, &wait
);
2862 set_current_state(TASK_UNINTERRUPTIBLE
);
2863 if (test_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2865 current
->state
= TASK_RUNNING
;
2866 remove_wait_queue(&journal
->j_join_wait
, &wait
);
2869 static void wake_queued_writers(struct super_block
*s
)
2871 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
2872 if (test_and_clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
))
2873 wake_up(&journal
->j_join_wait
);
2876 static void let_transaction_grow(struct super_block
*sb
, unsigned long trans_id
)
2878 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
2879 unsigned long bcount
= journal
->j_bcount
;
2881 schedule_timeout_uninterruptible(1);
2882 journal
->j_current_jl
->j_state
|= LIST_COMMIT_PENDING
;
2883 while ((atomic_read(&journal
->j_wcount
) > 0 ||
2884 atomic_read(&journal
->j_jlock
)) &&
2885 journal
->j_trans_id
== trans_id
) {
2886 queue_log_writer(sb
);
2888 if (journal
->j_trans_id
!= trans_id
)
2890 if (bcount
== journal
->j_bcount
)
2892 bcount
= journal
->j_bcount
;
2896 /* join == true if you must join an existing transaction.
2897 ** join == false if you can deal with waiting for others to finish
2899 ** this will block until the transaction is joinable. send the number of blocks you
2900 ** expect to use in nblocks.
2902 static int do_journal_begin_r(struct reiserfs_transaction_handle
*th
,
2903 struct super_block
*p_s_sb
, unsigned long nblocks
,
2906 time_t now
= get_seconds();
2908 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
2909 struct reiserfs_transaction_handle myth
;
2910 int sched_count
= 0;
2913 reiserfs_check_lock_depth(p_s_sb
, "journal_begin");
2914 if (nblocks
> journal
->j_trans_max
)
2917 PROC_INFO_INC(p_s_sb
, journal
.journal_being
);
2918 /* set here for journal_join */
2920 th
->t_super
= p_s_sb
;
2923 lock_journal(p_s_sb
);
2924 if (join
!= JBEGIN_ABORT
&& reiserfs_is_journal_aborted(journal
)) {
2925 unlock_journal(p_s_sb
);
2926 retval
= journal
->j_errno
;
2929 journal
->j_bcount
++;
2931 if (test_bit(J_WRITERS_BLOCKED
, &journal
->j_state
)) {
2932 unlock_journal(p_s_sb
);
2933 reiserfs_wait_on_write_block(p_s_sb
);
2934 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_writers
);
2937 now
= get_seconds();
2939 /* if there is no room in the journal OR
2940 ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning
2941 ** we don't sleep if there aren't other writers
2944 if ((!join
&& journal
->j_must_wait
> 0) ||
2946 && (journal
->j_len_alloc
+ nblocks
+ 2) >= journal
->j_max_batch
)
2947 || (!join
&& atomic_read(&journal
->j_wcount
) > 0
2948 && journal
->j_trans_start_time
> 0
2949 && (now
- journal
->j_trans_start_time
) >
2950 journal
->j_max_trans_age
) || (!join
2951 && atomic_read(&journal
->j_jlock
))
2952 || (!join
&& journal
->j_cnode_free
< (journal
->j_trans_max
* 3))) {
2954 old_trans_id
= journal
->j_trans_id
;
2955 unlock_journal(p_s_sb
); /* allow others to finish this transaction */
2957 if (!join
&& (journal
->j_len_alloc
+ nblocks
+ 2) >=
2958 journal
->j_max_batch
&&
2959 ((journal
->j_len
+ nblocks
+ 2) * 100) <
2960 (journal
->j_len_alloc
* 75)) {
2961 if (atomic_read(&journal
->j_wcount
) > 10) {
2963 queue_log_writer(p_s_sb
);
2967 /* don't mess with joining the transaction if all we have to do is
2968 * wait for someone else to do a commit
2970 if (atomic_read(&journal
->j_jlock
)) {
2971 while (journal
->j_trans_id
== old_trans_id
&&
2972 atomic_read(&journal
->j_jlock
)) {
2973 queue_log_writer(p_s_sb
);
2977 retval
= journal_join(&myth
, p_s_sb
, 1);
2981 /* someone might have ended the transaction while we joined */
2982 if (old_trans_id
!= journal
->j_trans_id
) {
2983 retval
= do_journal_end(&myth
, p_s_sb
, 1, 0);
2985 retval
= do_journal_end(&myth
, p_s_sb
, 1, COMMIT_NOW
);
2991 PROC_INFO_INC(p_s_sb
, journal
.journal_relock_wcount
);
2994 /* we are the first writer, set trans_id */
2995 if (journal
->j_trans_start_time
== 0) {
2996 journal
->j_trans_start_time
= get_seconds();
2998 atomic_inc(&(journal
->j_wcount
));
2999 journal
->j_len_alloc
+= nblocks
;
3000 th
->t_blocks_logged
= 0;
3001 th
->t_blocks_allocated
= nblocks
;
3002 th
->t_trans_id
= journal
->j_trans_id
;
3003 unlock_journal(p_s_sb
);
3004 INIT_LIST_HEAD(&th
->t_list
);
3009 memset(th
, 0, sizeof(*th
));
3010 /* Re-set th->t_super, so we can properly keep track of how many
3011 * persistent transactions there are. We need to do this so if this
3012 * call is part of a failed restart_transaction, we can free it later */
3013 th
->t_super
= p_s_sb
;
3017 struct reiserfs_transaction_handle
*reiserfs_persistent_transaction(struct
3023 struct reiserfs_transaction_handle
*th
;
3025 /* if we're nesting into an existing transaction. It will be
3026 ** persistent on its own
3028 if (reiserfs_transaction_running(s
)) {
3029 th
= current
->journal_info
;
3031 if (th
->t_refcount
< 2) {
3036 th
= kmalloc(sizeof(struct reiserfs_transaction_handle
), GFP_NOFS
);
3039 ret
= journal_begin(th
, s
, nblocks
);
3045 SB_JOURNAL(s
)->j_persistent_trans
++;
3049 int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle
*th
)
3051 struct super_block
*s
= th
->t_super
;
3054 ret
= journal_end(th
, th
->t_super
, th
->t_blocks_allocated
);
3057 if (th
->t_refcount
== 0) {
3058 SB_JOURNAL(s
)->j_persistent_trans
--;
3064 static int journal_join(struct reiserfs_transaction_handle
*th
,
3065 struct super_block
*p_s_sb
, unsigned long nblocks
)
3067 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3069 /* this keeps do_journal_end from NULLing out the current->journal_info
3072 th
->t_handle_save
= cur_th
;
3073 if (cur_th
&& cur_th
->t_refcount
> 1) {
3076 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_JOIN
);
3079 int journal_join_abort(struct reiserfs_transaction_handle
*th
,
3080 struct super_block
*p_s_sb
, unsigned long nblocks
)
3082 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3084 /* this keeps do_journal_end from NULLing out the current->journal_info
3087 th
->t_handle_save
= cur_th
;
3088 if (cur_th
&& cur_th
->t_refcount
> 1) {
3091 return do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_ABORT
);
3094 int journal_begin(struct reiserfs_transaction_handle
*th
,
3095 struct super_block
*p_s_sb
, unsigned long nblocks
)
3097 struct reiserfs_transaction_handle
*cur_th
= current
->journal_info
;
3100 th
->t_handle_save
= NULL
;
3102 /* we are nesting into the current transaction */
3103 if (cur_th
->t_super
== p_s_sb
) {
3104 BUG_ON(!cur_th
->t_refcount
);
3105 cur_th
->t_refcount
++;
3106 memcpy(th
, cur_th
, sizeof(*th
));
3107 if (th
->t_refcount
<= 1)
3108 reiserfs_warning(p_s_sb
,
3109 "BAD: refcount <= 1, but journal_info != 0");
3112 /* we've ended up with a handle from a different filesystem.
3113 ** save it and restore on journal_end. This should never
3116 reiserfs_warning(p_s_sb
,
3117 "clm-2100: nesting info a different FS");
3118 th
->t_handle_save
= current
->journal_info
;
3119 current
->journal_info
= th
;
3122 current
->journal_info
= th
;
3124 ret
= do_journal_begin_r(th
, p_s_sb
, nblocks
, JBEGIN_REG
);
3125 if (current
->journal_info
!= th
)
3128 /* I guess this boils down to being the reciprocal of clm-2100 above.
3129 * If do_journal_begin_r fails, we need to put it back, since journal_end
3130 * won't be called to do it. */
3132 current
->journal_info
= th
->t_handle_save
;
3134 BUG_ON(!th
->t_refcount
);
3140 ** puts bh into the current transaction. If it was already there, reorders removes the
3141 ** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
3143 ** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the
3144 ** transaction is committed.
3146 ** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
3148 int journal_mark_dirty(struct reiserfs_transaction_handle
*th
,
3149 struct super_block
*p_s_sb
, struct buffer_head
*bh
)
3151 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3152 struct reiserfs_journal_cnode
*cn
= NULL
;
3153 int count_already_incd
= 0;
3155 BUG_ON(!th
->t_trans_id
);
3157 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty
);
3158 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3159 reiserfs_panic(th
->t_super
,
3160 "journal-1577: handle trans id %ld != current trans id %ld\n",
3161 th
->t_trans_id
, journal
->j_trans_id
);
3166 prepared
= test_clear_buffer_journal_prepared(bh
);
3167 clear_buffer_journal_restore_dirty(bh
);
3168 /* already in this transaction, we are done */
3169 if (buffer_journaled(bh
)) {
3170 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_already
);
3174 /* this must be turned into a panic instead of a warning. We can't allow
3175 ** a dirty or journal_dirty or locked buffer to be logged, as some changes
3176 ** could get to disk too early. NOT GOOD.
3178 if (!prepared
|| buffer_dirty(bh
)) {
3179 reiserfs_warning(p_s_sb
, "journal-1777: buffer %llu bad state "
3180 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3181 (unsigned long long)bh
->b_blocknr
,
3182 prepared
? ' ' : '!',
3183 buffer_locked(bh
) ? ' ' : '!',
3184 buffer_dirty(bh
) ? ' ' : '!',
3185 buffer_journal_dirty(bh
) ? ' ' : '!');
3188 if (atomic_read(&(journal
->j_wcount
)) <= 0) {
3189 reiserfs_warning(p_s_sb
,
3190 "journal-1409: journal_mark_dirty returning because j_wcount was %d",
3191 atomic_read(&(journal
->j_wcount
)));
3194 /* this error means I've screwed up, and we've overflowed the transaction.
3195 ** Nothing can be done here, except make the FS readonly or panic.
3197 if (journal
->j_len
>= journal
->j_trans_max
) {
3198 reiserfs_panic(th
->t_super
,
3199 "journal-1413: journal_mark_dirty: j_len (%lu) is too big\n",
3203 if (buffer_journal_dirty(bh
)) {
3204 count_already_incd
= 1;
3205 PROC_INFO_INC(p_s_sb
, journal
.mark_dirty_notjournal
);
3206 clear_buffer_journal_dirty(bh
);
3209 if (journal
->j_len
> journal
->j_len_alloc
) {
3210 journal
->j_len_alloc
= journal
->j_len
+ JOURNAL_PER_BALANCE_CNT
;
3213 set_buffer_journaled(bh
);
3215 /* now put this guy on the end */
3217 cn
= get_cnode(p_s_sb
);
3219 reiserfs_panic(p_s_sb
, "get_cnode failed!\n");
3222 if (th
->t_blocks_logged
== th
->t_blocks_allocated
) {
3223 th
->t_blocks_allocated
+= JOURNAL_PER_BALANCE_CNT
;
3224 journal
->j_len_alloc
+= JOURNAL_PER_BALANCE_CNT
;
3226 th
->t_blocks_logged
++;
3230 cn
->blocknr
= bh
->b_blocknr
;
3233 insert_journal_hash(journal
->j_hash_table
, cn
);
3234 if (!count_already_incd
) {
3239 cn
->prev
= journal
->j_last
;
3241 if (journal
->j_last
) {
3242 journal
->j_last
->next
= cn
;
3243 journal
->j_last
= cn
;
3245 journal
->j_first
= cn
;
3246 journal
->j_last
= cn
;
3251 int journal_end(struct reiserfs_transaction_handle
*th
,
3252 struct super_block
*p_s_sb
, unsigned long nblocks
)
3254 if (!current
->journal_info
&& th
->t_refcount
> 1)
3255 reiserfs_warning(p_s_sb
, "REISER-NESTING: th NULL, refcount %d",
3258 if (!th
->t_trans_id
) {
3264 if (th
->t_refcount
> 0) {
3265 struct reiserfs_transaction_handle
*cur_th
=
3266 current
->journal_info
;
3268 /* we aren't allowed to close a nested transaction on a different
3269 ** filesystem from the one in the task struct
3271 if (cur_th
->t_super
!= th
->t_super
)
3275 memcpy(current
->journal_info
, th
, sizeof(*th
));
3280 return do_journal_end(th
, p_s_sb
, nblocks
, 0);
3284 /* removes from the current transaction, relsing and descrementing any counters.
3285 ** also files the removed buffer directly onto the clean list
3287 ** called by journal_mark_freed when a block has been deleted
3289 ** returns 1 if it cleaned and relsed the buffer. 0 otherwise
3291 static int remove_from_transaction(struct super_block
*p_s_sb
,
3292 b_blocknr_t blocknr
, int already_cleaned
)
3294 struct buffer_head
*bh
;
3295 struct reiserfs_journal_cnode
*cn
;
3296 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3299 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3300 if (!cn
|| !cn
->bh
) {
3305 cn
->prev
->next
= cn
->next
;
3308 cn
->next
->prev
= cn
->prev
;
3310 if (cn
== journal
->j_first
) {
3311 journal
->j_first
= cn
->next
;
3313 if (cn
== journal
->j_last
) {
3314 journal
->j_last
= cn
->prev
;
3317 remove_journal_hash(p_s_sb
, journal
->j_hash_table
, NULL
,
3319 clear_buffer_journaled(bh
); /* don't log this one */
3321 if (!already_cleaned
) {
3322 clear_buffer_journal_dirty(bh
);
3323 clear_buffer_dirty(bh
);
3324 clear_buffer_journal_test(bh
);
3326 if (atomic_read(&(bh
->b_count
)) < 0) {
3327 reiserfs_warning(p_s_sb
,
3328 "journal-1752: remove from trans, b_count < 0");
3333 journal
->j_len_alloc
--;
3334 free_cnode(p_s_sb
, cn
);
3339 ** for any cnode in a journal list, it can only be dirtied of all the
3340 ** transactions that include it are commited to disk.
3341 ** this checks through each transaction, and returns 1 if you are allowed to dirty,
3342 ** and 0 if you aren't
3344 ** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
3345 ** blocks for a given transaction on disk
3348 static int can_dirty(struct reiserfs_journal_cnode
*cn
)
3350 struct super_block
*sb
= cn
->sb
;
3351 b_blocknr_t blocknr
= cn
->blocknr
;
3352 struct reiserfs_journal_cnode
*cur
= cn
->hprev
;
3355 /* first test hprev. These are all newer than cn, so any node here
3356 ** with the same block number and dev means this node can't be sent
3357 ** to disk right now.
3359 while (cur
&& can_dirty
) {
3360 if (cur
->jlist
&& cur
->bh
&& cur
->blocknr
&& cur
->sb
== sb
&&
3361 cur
->blocknr
== blocknr
) {
3366 /* then test hnext. These are all older than cn. As long as they
3367 ** are committed to the log, it is safe to write cn to disk
3370 while (cur
&& can_dirty
) {
3371 if (cur
->jlist
&& cur
->jlist
->j_len
> 0 &&
3372 atomic_read(&(cur
->jlist
->j_commit_left
)) > 0 && cur
->bh
&&
3373 cur
->blocknr
&& cur
->sb
== sb
&& cur
->blocknr
== blocknr
) {
3381 /* syncs the commit blocks, but does not force the real buffers to disk
3382 ** will wait until the current transaction is done/commited before returning
3384 int journal_end_sync(struct reiserfs_transaction_handle
*th
,
3385 struct super_block
*p_s_sb
, unsigned long nblocks
)
3387 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3389 BUG_ON(!th
->t_trans_id
);
3390 /* you can sync while nested, very, very bad */
3391 if (th
->t_refcount
> 1) {
3394 if (journal
->j_len
== 0) {
3395 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3397 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3399 return do_journal_end(th
, p_s_sb
, nblocks
, COMMIT_NOW
| WAIT
);
3403 ** writeback the pending async commits to disk
3405 static void flush_async_commits(void *p
)
3407 struct super_block
*p_s_sb
= p
;
3408 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3409 struct reiserfs_journal_list
*jl
;
3410 struct list_head
*entry
;
3413 if (!list_empty(&journal
->j_journal_list
)) {
3414 /* last entry is the youngest, commit it and you get everything */
3415 entry
= journal
->j_journal_list
.prev
;
3416 jl
= JOURNAL_LIST_ENTRY(entry
);
3417 flush_commit_list(p_s_sb
, jl
, 1);
3421 * this is a little racey, but there's no harm in missing
3422 * the filemap_fdata_write
3424 if (!atomic_read(&journal
->j_async_throttle
)
3425 && !reiserfs_is_journal_aborted(journal
)) {
3426 atomic_inc(&journal
->j_async_throttle
);
3427 filemap_fdatawrite(p_s_sb
->s_bdev
->bd_inode
->i_mapping
);
3428 atomic_dec(&journal
->j_async_throttle
);
3433 ** flushes any old transactions to disk
3434 ** ends the current transaction if it is too old
3436 int reiserfs_flush_old_commits(struct super_block
*p_s_sb
)
3439 struct reiserfs_transaction_handle th
;
3440 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3442 now
= get_seconds();
3443 /* safety check so we don't flush while we are replaying the log during
3446 if (list_empty(&journal
->j_journal_list
)) {
3450 /* check the current transaction. If there are no writers, and it is
3451 * too old, finish it, and force the commit blocks to disk
3453 if (atomic_read(&journal
->j_wcount
) <= 0 &&
3454 journal
->j_trans_start_time
> 0 &&
3455 journal
->j_len
> 0 &&
3456 (now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3457 if (!journal_join(&th
, p_s_sb
, 1)) {
3458 reiserfs_prepare_for_journal(p_s_sb
,
3459 SB_BUFFER_WITH_SB(p_s_sb
),
3461 journal_mark_dirty(&th
, p_s_sb
,
3462 SB_BUFFER_WITH_SB(p_s_sb
));
3464 /* we're only being called from kreiserfsd, it makes no sense to do
3465 ** an async commit so that kreiserfsd can do it later
3467 do_journal_end(&th
, p_s_sb
, 1, COMMIT_NOW
| WAIT
);
3470 return p_s_sb
->s_dirt
;
3474 ** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
3476 ** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all
3477 ** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just
3478 ** flushes the commit list and returns 0.
3480 ** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait.
3482 ** Note, we can't allow the journal_end to proceed while there are still writers in the log.
3484 static int check_journal_end(struct reiserfs_transaction_handle
*th
,
3485 struct super_block
*p_s_sb
, unsigned long nblocks
,
3490 int flush
= flags
& FLUSH_ALL
;
3491 int commit_now
= flags
& COMMIT_NOW
;
3492 int wait_on_commit
= flags
& WAIT
;
3493 struct reiserfs_journal_list
*jl
;
3494 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3496 BUG_ON(!th
->t_trans_id
);
3498 if (th
->t_trans_id
!= journal
->j_trans_id
) {
3499 reiserfs_panic(th
->t_super
,
3500 "journal-1577: handle trans id %ld != current trans id %ld\n",
3501 th
->t_trans_id
, journal
->j_trans_id
);
3504 journal
->j_len_alloc
-= (th
->t_blocks_allocated
- th
->t_blocks_logged
);
3505 if (atomic_read(&(journal
->j_wcount
)) > 0) { /* <= 0 is allowed. unmounting might not call begin */
3506 atomic_dec(&(journal
->j_wcount
));
3509 /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released
3510 ** will be dealt with by next transaction that actually writes something, but should be taken
3511 ** care of in this trans
3513 if (journal
->j_len
== 0) {
3516 /* if wcount > 0, and we are called to with flush or commit_now,
3517 ** we wait on j_join_wait. We will wake up when the last writer has
3518 ** finished the transaction, and started it on its way to the disk.
3519 ** Then, we flush the commit or journal list, and just return 0
3520 ** because the rest of journal end was already done for this transaction.
3522 if (atomic_read(&(journal
->j_wcount
)) > 0) {
3523 if (flush
|| commit_now
) {
3526 jl
= journal
->j_current_jl
;
3527 trans_id
= jl
->j_trans_id
;
3529 jl
->j_state
|= LIST_COMMIT_PENDING
;
3530 atomic_set(&(journal
->j_jlock
), 1);
3532 journal
->j_next_full_flush
= 1;
3534 unlock_journal(p_s_sb
);
3536 /* sleep while the current transaction is still j_jlocked */
3537 while (journal
->j_trans_id
== trans_id
) {
3538 if (atomic_read(&journal
->j_jlock
)) {
3539 queue_log_writer(p_s_sb
);
3541 lock_journal(p_s_sb
);
3542 if (journal
->j_trans_id
== trans_id
) {
3543 atomic_set(&(journal
->j_jlock
),
3546 unlock_journal(p_s_sb
);
3549 if (journal
->j_trans_id
== trans_id
) {
3553 && journal_list_still_alive(p_s_sb
, trans_id
)
3554 && wait_on_commit
) {
3555 flush_commit_list(p_s_sb
, jl
, 1);
3559 unlock_journal(p_s_sb
);
3563 /* deal with old transactions where we are the last writers */
3564 now
= get_seconds();
3565 if ((now
- journal
->j_trans_start_time
) > journal
->j_max_trans_age
) {
3567 journal
->j_next_async_flush
= 1;
3569 /* don't batch when someone is waiting on j_join_wait */
3570 /* don't batch when syncing the commit or flushing the whole trans */
3571 if (!(journal
->j_must_wait
> 0) && !(atomic_read(&(journal
->j_jlock
)))
3572 && !flush
&& !commit_now
&& (journal
->j_len
< journal
->j_max_batch
)
3573 && journal
->j_len_alloc
< journal
->j_max_batch
3574 && journal
->j_cnode_free
> (journal
->j_trans_max
* 3)) {
3575 journal
->j_bcount
++;
3576 unlock_journal(p_s_sb
);
3580 if (journal
->j_start
> SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
3581 reiserfs_panic(p_s_sb
,
3582 "journal-003: journal_end: j_start (%ld) is too high\n",
3589 ** Does all the work that makes deleting blocks safe.
3590 ** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
3593 ** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes
3594 ** before this transaction has finished.
3596 ** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with
3597 ** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash,
3598 ** the block can't be reallocated yet.
3600 ** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
3602 int journal_mark_freed(struct reiserfs_transaction_handle
*th
,
3603 struct super_block
*p_s_sb
, b_blocknr_t blocknr
)
3605 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3606 struct reiserfs_journal_cnode
*cn
= NULL
;
3607 struct buffer_head
*bh
= NULL
;
3608 struct reiserfs_list_bitmap
*jb
= NULL
;
3610 BUG_ON(!th
->t_trans_id
);
3612 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_hash_table
, blocknr
);
3617 /* if it is journal new, we just remove it from this transaction */
3618 if (bh
&& buffer_journal_new(bh
)) {
3619 clear_buffer_journal_new(bh
);
3620 clear_prepared_bits(bh
);
3621 reiserfs_clean_and_file_buffer(bh
);
3622 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3624 /* set the bit for this block in the journal bitmap for this transaction */
3625 jb
= journal
->j_current_jl
->j_list_bitmap
;
3627 reiserfs_panic(p_s_sb
,
3628 "journal-1702: journal_mark_freed, journal_list_bitmap is NULL\n");
3630 set_bit_in_list_bitmap(p_s_sb
, blocknr
, jb
);
3632 /* Note, the entire while loop is not allowed to schedule. */
3635 clear_prepared_bits(bh
);
3636 reiserfs_clean_and_file_buffer(bh
);
3638 cleaned
= remove_from_transaction(p_s_sb
, blocknr
, cleaned
);
3640 /* find all older transactions with this block, make sure they don't try to write it out */
3641 cn
= get_journal_hash_dev(p_s_sb
, journal
->j_list_hash_table
,
3644 if (p_s_sb
== cn
->sb
&& blocknr
== cn
->blocknr
) {
3645 set_bit(BLOCK_FREED
, &cn
->state
);
3648 /* remove_from_transaction will brelse the buffer if it was
3649 ** in the current trans
3651 clear_buffer_journal_dirty(cn
->
3653 clear_buffer_dirty(cn
->bh
);
3654 clear_buffer_journal_test(cn
->
3659 (&(cn
->bh
->b_count
)) < 0) {
3660 reiserfs_warning(p_s_sb
,
3661 "journal-2138: cn->bh->b_count < 0");
3664 if (cn
->jlist
) { /* since we are clearing the bh, we MUST dec nonzerolen */
3677 put_bh(bh
); /* get_hash grabs the buffer */
3678 if (atomic_read(&(bh
->b_count
)) < 0) {
3679 reiserfs_warning(p_s_sb
,
3680 "journal-2165: bh->b_count < 0");
3686 void reiserfs_update_inode_transaction(struct inode
*inode
)
3688 struct reiserfs_journal
*journal
= SB_JOURNAL(inode
->i_sb
);
3689 REISERFS_I(inode
)->i_jl
= journal
->j_current_jl
;
3690 REISERFS_I(inode
)->i_trans_id
= journal
->j_trans_id
;
3694 * returns -1 on error, 0 if no commits/barriers were done and 1
3695 * if a transaction was actually committed and the barrier was done
3697 static int __commit_trans_jl(struct inode
*inode
, unsigned long id
,
3698 struct reiserfs_journal_list
*jl
)
3700 struct reiserfs_transaction_handle th
;
3701 struct super_block
*sb
= inode
->i_sb
;
3702 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
3705 /* is it from the current transaction, or from an unknown transaction? */
3706 if (id
== journal
->j_trans_id
) {
3707 jl
= journal
->j_current_jl
;
3708 /* try to let other writers come in and grow this transaction */
3709 let_transaction_grow(sb
, id
);
3710 if (journal
->j_trans_id
!= id
) {
3711 goto flush_commit_only
;
3714 ret
= journal_begin(&th
, sb
, 1);
3718 /* someone might have ended this transaction while we joined */
3719 if (journal
->j_trans_id
!= id
) {
3720 reiserfs_prepare_for_journal(sb
, SB_BUFFER_WITH_SB(sb
),
3722 journal_mark_dirty(&th
, sb
, SB_BUFFER_WITH_SB(sb
));
3723 ret
= journal_end(&th
, sb
, 1);
3724 goto flush_commit_only
;
3727 ret
= journal_end_sync(&th
, sb
, 1);
3732 /* this gets tricky, we have to make sure the journal list in
3733 * the inode still exists. We know the list is still around
3734 * if we've got a larger transaction id than the oldest list
3737 if (journal_list_still_alive(inode
->i_sb
, id
)) {
3739 * we only set ret to 1 when we know for sure
3740 * the barrier hasn't been started yet on the commit
3743 if (atomic_read(&jl
->j_commit_left
) > 1)
3745 flush_commit_list(sb
, jl
, 1);
3746 if (journal
->j_errno
)
3747 ret
= journal
->j_errno
;
3750 /* otherwise the list is gone, and long since committed */
3754 int reiserfs_commit_for_inode(struct inode
*inode
)
3756 unsigned long id
= REISERFS_I(inode
)->i_trans_id
;
3757 struct reiserfs_journal_list
*jl
= REISERFS_I(inode
)->i_jl
;
3759 /* for the whole inode, assume unset id means it was
3760 * changed in the current transaction. More conservative
3763 reiserfs_update_inode_transaction(inode
);
3764 id
= REISERFS_I(inode
)->i_trans_id
;
3765 /* jl will be updated in __commit_trans_jl */
3768 return __commit_trans_jl(inode
, id
, jl
);
3771 void reiserfs_restore_prepared_buffer(struct super_block
*p_s_sb
,
3772 struct buffer_head
*bh
)
3774 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3775 PROC_INFO_INC(p_s_sb
, journal
.restore_prepared
);
3779 if (test_clear_buffer_journal_restore_dirty(bh
) &&
3780 buffer_journal_dirty(bh
)) {
3781 struct reiserfs_journal_cnode
*cn
;
3782 cn
= get_journal_hash_dev(p_s_sb
,
3783 journal
->j_list_hash_table
,
3785 if (cn
&& can_dirty(cn
)) {
3786 set_buffer_journal_test(bh
);
3787 mark_buffer_dirty(bh
);
3790 clear_buffer_journal_prepared(bh
);
3793 extern struct tree_balance
*cur_tb
;
3795 ** before we can change a metadata block, we have to make sure it won't
3796 ** be written to disk while we are altering it. So, we must:
3801 int reiserfs_prepare_for_journal(struct super_block
*p_s_sb
,
3802 struct buffer_head
*bh
, int wait
)
3804 PROC_INFO_INC(p_s_sb
, journal
.prepare
);
3806 if (test_set_buffer_locked(bh
)) {
3811 set_buffer_journal_prepared(bh
);
3812 if (test_clear_buffer_dirty(bh
) && buffer_journal_dirty(bh
)) {
3813 clear_buffer_journal_test(bh
);
3814 set_buffer_journal_restore_dirty(bh
);
3820 static void flush_old_journal_lists(struct super_block
*s
)
3822 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
3823 struct reiserfs_journal_list
*jl
;
3824 struct list_head
*entry
;
3825 time_t now
= get_seconds();
3827 while (!list_empty(&journal
->j_journal_list
)) {
3828 entry
= journal
->j_journal_list
.next
;
3829 jl
= JOURNAL_LIST_ENTRY(entry
);
3830 /* this check should always be run, to send old lists to disk */
3831 if (jl
->j_timestamp
< (now
- (JOURNAL_MAX_TRANS_AGE
* 4))) {
3832 flush_used_journal_lists(s
, jl
);
3840 ** long and ugly. If flush, will not return until all commit
3841 ** blocks and all real buffers in the trans are on disk.
3842 ** If no_async, won't return until all commit blocks are on disk.
3844 ** keep reading, there are comments as you go along
3846 ** If the journal is aborted, we just clean up. Things like flushing
3847 ** journal lists, etc just won't happen.
3849 static int do_journal_end(struct reiserfs_transaction_handle
*th
,
3850 struct super_block
*p_s_sb
, unsigned long nblocks
,
3853 struct reiserfs_journal
*journal
= SB_JOURNAL(p_s_sb
);
3854 struct reiserfs_journal_cnode
*cn
, *next
, *jl_cn
;
3855 struct reiserfs_journal_cnode
*last_cn
= NULL
;
3856 struct reiserfs_journal_desc
*desc
;
3857 struct reiserfs_journal_commit
*commit
;
3858 struct buffer_head
*c_bh
; /* commit bh */
3859 struct buffer_head
*d_bh
; /* desc bh */
3860 int cur_write_start
= 0; /* start index of current log write */
3863 int flush
= flags
& FLUSH_ALL
;
3864 int wait_on_commit
= flags
& WAIT
;
3865 struct reiserfs_journal_list
*jl
, *temp_jl
;
3866 struct list_head
*entry
, *safe
;
3867 unsigned long jindex
;
3868 unsigned long commit_trans_id
;
3871 BUG_ON(th
->t_refcount
> 1);
3872 BUG_ON(!th
->t_trans_id
);
3875 current
->journal_info
= th
->t_handle_save
;
3876 reiserfs_check_lock_depth(p_s_sb
, "journal end");
3877 if (journal
->j_len
== 0) {
3878 reiserfs_prepare_for_journal(p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
),
3880 journal_mark_dirty(th
, p_s_sb
, SB_BUFFER_WITH_SB(p_s_sb
));
3883 lock_journal(p_s_sb
);
3884 if (journal
->j_next_full_flush
) {
3888 if (journal
->j_next_async_flush
) {
3889 flags
|= COMMIT_NOW
| WAIT
;
3893 /* check_journal_end locks the journal, and unlocks if it does not return 1
3894 ** it tells us if we should continue with the journal_end, or just return
3896 if (!check_journal_end(th
, p_s_sb
, nblocks
, flags
)) {
3898 wake_queued_writers(p_s_sb
);
3899 reiserfs_async_progress_wait(p_s_sb
);
3903 /* check_journal_end might set these, check again */
3904 if (journal
->j_next_full_flush
) {
3909 ** j must wait means we have to flush the log blocks, and the real blocks for
3912 if (journal
->j_must_wait
> 0) {
3915 #ifdef REISERFS_PREALLOCATE
3916 /* quota ops might need to nest, setup the journal_info pointer for them
3917 * and raise the refcount so that it is > 0. */
3918 current
->journal_info
= th
;
3920 reiserfs_discard_all_prealloc(th
); /* it should not involve new blocks into
3921 * the transaction */
3923 current
->journal_info
= th
->t_handle_save
;
3926 /* setup description block */
3928 journal_getblk(p_s_sb
,
3929 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3931 set_buffer_uptodate(d_bh
);
3932 desc
= (struct reiserfs_journal_desc
*)(d_bh
)->b_data
;
3933 memset(d_bh
->b_data
, 0, d_bh
->b_size
);
3934 memcpy(get_journal_desc_magic(d_bh
), JOURNAL_DESC_MAGIC
, 8);
3935 set_desc_trans_id(desc
, journal
->j_trans_id
);
3937 /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */
3938 c_bh
= journal_getblk(p_s_sb
, SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
3939 ((journal
->j_start
+ journal
->j_len
+
3940 1) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
3941 commit
= (struct reiserfs_journal_commit
*)c_bh
->b_data
;
3942 memset(c_bh
->b_data
, 0, c_bh
->b_size
);
3943 set_commit_trans_id(commit
, journal
->j_trans_id
);
3944 set_buffer_uptodate(c_bh
);
3946 /* init this journal list */
3947 jl
= journal
->j_current_jl
;
3949 /* we lock the commit before doing anything because
3950 * we want to make sure nobody tries to run flush_commit_list until
3951 * the new transaction is fully setup, and we've already flushed the
3954 down(&jl
->j_commit_lock
);
3956 /* save the transaction id in case we need to commit it later */
3957 commit_trans_id
= jl
->j_trans_id
;
3959 atomic_set(&jl
->j_older_commits_done
, 0);
3960 jl
->j_trans_id
= journal
->j_trans_id
;
3961 jl
->j_timestamp
= journal
->j_trans_start_time
;
3962 jl
->j_commit_bh
= c_bh
;
3963 jl
->j_start
= journal
->j_start
;
3964 jl
->j_len
= journal
->j_len
;
3965 atomic_set(&jl
->j_nonzerolen
, journal
->j_len
);
3966 atomic_set(&jl
->j_commit_left
, journal
->j_len
+ 2);
3967 jl
->j_realblock
= NULL
;
3969 /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
3970 ** for each real block, add it to the journal list hash,
3971 ** copy into real block index array in the commit or desc block
3973 trans_half
= journal_trans_half(p_s_sb
->s_blocksize
);
3974 for (i
= 0, cn
= journal
->j_first
; cn
; cn
= cn
->next
, i
++) {
3975 if (buffer_journaled(cn
->bh
)) {
3976 jl_cn
= get_cnode(p_s_sb
);
3978 reiserfs_panic(p_s_sb
,
3979 "journal-1676, get_cnode returned NULL\n");
3982 jl
->j_realblock
= jl_cn
;
3984 jl_cn
->prev
= last_cn
;
3987 last_cn
->next
= jl_cn
;
3990 /* make sure the block we are trying to log is not a block
3991 of journal or reserved area */
3993 if (is_block_in_log_or_reserved_area
3994 (p_s_sb
, cn
->bh
->b_blocknr
)) {
3995 reiserfs_panic(p_s_sb
,
3996 "journal-2332: Trying to log block %lu, which is a log block\n",
3999 jl_cn
->blocknr
= cn
->bh
->b_blocknr
;
4004 insert_journal_hash(journal
->j_list_hash_table
, jl_cn
);
4005 if (i
< trans_half
) {
4006 desc
->j_realblock
[i
] =
4007 cpu_to_le32(cn
->bh
->b_blocknr
);
4009 commit
->j_realblock
[i
- trans_half
] =
4010 cpu_to_le32(cn
->bh
->b_blocknr
);
4016 set_desc_trans_len(desc
, journal
->j_len
);
4017 set_desc_mount_id(desc
, journal
->j_mount_id
);
4018 set_desc_trans_id(desc
, journal
->j_trans_id
);
4019 set_commit_trans_len(commit
, journal
->j_len
);
4021 /* special check in case all buffers in the journal were marked for not logging */
4022 if (journal
->j_len
== 0) {
4026 /* we're about to dirty all the log blocks, mark the description block
4027 * dirty now too. Don't mark the commit block dirty until all the
4028 * others are on disk
4030 mark_buffer_dirty(d_bh
);
4032 /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
4033 cur_write_start
= journal
->j_start
;
4034 cn
= journal
->j_first
;
4035 jindex
= 1; /* start at one so we don't get the desc again */
4037 clear_buffer_journal_new(cn
->bh
);
4038 /* copy all the real blocks into log area. dirty log blocks */
4039 if (buffer_journaled(cn
->bh
)) {
4040 struct buffer_head
*tmp_bh
;
4044 journal_getblk(p_s_sb
,
4045 SB_ONDISK_JOURNAL_1st_BLOCK(p_s_sb
) +
4048 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)));
4049 set_buffer_uptodate(tmp_bh
);
4050 page
= cn
->bh
->b_page
;
4052 memcpy(tmp_bh
->b_data
,
4053 addr
+ offset_in_page(cn
->bh
->b_data
),
4056 mark_buffer_dirty(tmp_bh
);
4058 set_buffer_journal_dirty(cn
->bh
);
4059 clear_buffer_journaled(cn
->bh
);
4061 /* JDirty cleared sometime during transaction. don't log this one */
4062 reiserfs_warning(p_s_sb
,
4063 "journal-2048: do_journal_end: BAD, buffer in journal hash, but not JDirty!");
4067 free_cnode(p_s_sb
, cn
);
4072 /* we are done with both the c_bh and d_bh, but
4073 ** c_bh must be written after all other commit blocks,
4074 ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
4077 journal
->j_current_jl
= alloc_journal_list(p_s_sb
);
4079 /* now it is safe to insert this transaction on the main list */
4080 list_add_tail(&jl
->j_list
, &journal
->j_journal_list
);
4081 list_add_tail(&jl
->j_working_list
, &journal
->j_working_list
);
4082 journal
->j_num_work_lists
++;
4084 /* reset journal values for the next transaction */
4085 old_start
= journal
->j_start
;
4087 (journal
->j_start
+ journal
->j_len
+
4088 2) % SB_ONDISK_JOURNAL_SIZE(p_s_sb
);
4089 atomic_set(&(journal
->j_wcount
), 0);
4090 journal
->j_bcount
= 0;
4091 journal
->j_last
= NULL
;
4092 journal
->j_first
= NULL
;
4094 journal
->j_trans_start_time
= 0;
4095 journal
->j_trans_id
++;
4096 journal
->j_current_jl
->j_trans_id
= journal
->j_trans_id
;
4097 journal
->j_must_wait
= 0;
4098 journal
->j_len_alloc
= 0;
4099 journal
->j_next_full_flush
= 0;
4100 journal
->j_next_async_flush
= 0;
4101 init_journal_hash(p_s_sb
);
4103 // make sure reiserfs_add_jh sees the new current_jl before we
4104 // write out the tails
4107 /* tail conversion targets have to hit the disk before we end the
4108 * transaction. Otherwise a later transaction might repack the tail
4109 * before this transaction commits, leaving the data block unflushed and
4110 * clean, if we crash before the later transaction commits, the data block
4113 if (!list_empty(&jl
->j_tail_bh_list
)) {
4115 write_ordered_buffers(&journal
->j_dirty_buffers_lock
,
4116 journal
, jl
, &jl
->j_tail_bh_list
);
4119 if (!list_empty(&jl
->j_tail_bh_list
))
4121 up(&jl
->j_commit_lock
);
4123 /* honor the flush wishes from the caller, simple commits can
4124 ** be done outside the journal lock, they are done below
4126 ** if we don't flush the commit list right now, we put it into
4127 ** the work queue so the people waiting on the async progress work
4128 ** queue don't wait for this proc to flush journal lists and such.
4131 flush_commit_list(p_s_sb
, jl
, 1);
4132 flush_journal_list(p_s_sb
, jl
, 1);
4133 } else if (!(jl
->j_state
& LIST_COMMIT_PENDING
))
4134 queue_delayed_work(commit_wq
, &journal
->j_work
, HZ
/ 10);
4136 /* if the next transaction has any chance of wrapping, flush
4137 ** transactions that might get overwritten. If any journal lists are very
4138 ** old flush them as well.
4141 list_for_each_safe(entry
, safe
, &journal
->j_journal_list
) {
4142 temp_jl
= JOURNAL_LIST_ENTRY(entry
);
4143 if (journal
->j_start
<= temp_jl
->j_start
) {
4144 if ((journal
->j_start
+ journal
->j_trans_max
+ 1) >=
4146 flush_used_journal_lists(p_s_sb
, temp_jl
);
4148 } else if ((journal
->j_start
+
4149 journal
->j_trans_max
+ 1) <
4150 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4151 /* if we don't cross into the next transaction and we don't
4152 * wrap, there is no way we can overlap any later transactions
4157 } else if ((journal
->j_start
+
4158 journal
->j_trans_max
+ 1) >
4159 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) {
4160 if (((journal
->j_start
+ journal
->j_trans_max
+ 1) %
4161 SB_ONDISK_JOURNAL_SIZE(p_s_sb
)) >=
4163 flush_used_journal_lists(p_s_sb
, temp_jl
);
4166 /* we don't overlap anything from out start to the end of the
4167 * log, and our wrapped portion doesn't overlap anything at
4168 * the start of the log. We can break
4174 flush_old_journal_lists(p_s_sb
);
4176 journal
->j_current_jl
->j_list_bitmap
=
4177 get_list_bitmap(p_s_sb
, journal
->j_current_jl
);
4179 if (!(journal
->j_current_jl
->j_list_bitmap
)) {
4180 reiserfs_panic(p_s_sb
,
4181 "journal-1996: do_journal_end, could not get a list bitmap\n");
4184 atomic_set(&(journal
->j_jlock
), 0);
4185 unlock_journal(p_s_sb
);
4186 /* wake up any body waiting to join. */
4187 clear_bit(J_WRITERS_QUEUED
, &journal
->j_state
);
4188 wake_up(&(journal
->j_join_wait
));
4190 if (!flush
&& wait_on_commit
&&
4191 journal_list_still_alive(p_s_sb
, commit_trans_id
)) {
4192 flush_commit_list(p_s_sb
, jl
, 1);
4195 reiserfs_check_lock_depth(p_s_sb
, "journal end2");
4197 memset(th
, 0, sizeof(*th
));
4198 /* Re-set th->t_super, so we can properly keep track of how many
4199 * persistent transactions there are. We need to do this so if this
4200 * call is part of a failed restart_transaction, we can free it later */
4201 th
->t_super
= p_s_sb
;
4203 return journal
->j_errno
;
4206 static void __reiserfs_journal_abort_hard(struct super_block
*sb
)
4208 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4209 if (test_bit(J_ABORTED
, &journal
->j_state
))
4212 printk(KERN_CRIT
"REISERFS: Aborting journal for filesystem on %s\n",
4213 reiserfs_bdevname(sb
));
4215 sb
->s_flags
|= MS_RDONLY
;
4216 set_bit(J_ABORTED
, &journal
->j_state
);
4218 #ifdef CONFIG_REISERFS_CHECK
4223 static void __reiserfs_journal_abort_soft(struct super_block
*sb
, int errno
)
4225 struct reiserfs_journal
*journal
= SB_JOURNAL(sb
);
4226 if (test_bit(J_ABORTED
, &journal
->j_state
))
4229 if (!journal
->j_errno
)
4230 journal
->j_errno
= errno
;
4232 __reiserfs_journal_abort_hard(sb
);
4235 void reiserfs_journal_abort(struct super_block
*sb
, int errno
)
4237 return __reiserfs_journal_abort_soft(sb
, errno
);