2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/mempool.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <linux/bio.h>
19 #include <linux/list_sort.h>
20 #include <linux/blkdev.h>
35 #include "trace_gfs2.h"
38 * gfs2_pin - Pin a buffer in memory
39 * @sdp: The superblock
40 * @bh: The buffer to be pinned
42 * The log lock must be held when calling this function
44 void gfs2_pin(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
)
46 struct gfs2_bufdata
*bd
;
48 BUG_ON(!current
->journal_info
);
50 clear_buffer_dirty(bh
);
51 if (test_set_buffer_pinned(bh
))
52 gfs2_assert_withdraw(sdp
, 0);
53 if (!buffer_uptodate(bh
))
54 gfs2_io_error_bh_wd(sdp
, bh
);
56 /* If this buffer is in the AIL and it has already been written
57 * to in-place disk block, remove it from the AIL.
59 spin_lock(&sdp
->sd_ail_lock
);
61 list_move(&bd
->bd_ail_st_list
, &bd
->bd_tr
->tr_ail2_list
);
62 spin_unlock(&sdp
->sd_ail_lock
);
64 atomic_inc(&sdp
->sd_log_pinned
);
65 trace_gfs2_pin(bd
, 1);
68 static bool buffer_is_rgrp(const struct gfs2_bufdata
*bd
)
70 return bd
->bd_gl
->gl_name
.ln_type
== LM_TYPE_RGRP
;
73 static void maybe_release_space(struct gfs2_bufdata
*bd
)
75 struct gfs2_glock
*gl
= bd
->bd_gl
;
76 struct gfs2_sbd
*sdp
= gl
->gl_name
.ln_sbd
;
77 struct gfs2_rgrpd
*rgd
= gfs2_glock2rgrp(gl
);
78 unsigned int index
= bd
->bd_bh
->b_blocknr
- gl
->gl_name
.ln_number
;
79 struct gfs2_bitmap
*bi
= rgd
->rd_bits
+ index
;
81 if (bi
->bi_clone
== NULL
)
83 if (sdp
->sd_args
.ar_discard
)
84 gfs2_rgrp_send_discards(sdp
, rgd
->rd_data0
, bd
->bd_bh
, bi
, 1, NULL
);
85 memcpy(bi
->bi_clone
+ bi
->bi_offset
,
86 bd
->bd_bh
->b_data
+ bi
->bi_offset
, bi
->bi_bytes
);
87 clear_bit(GBF_FULL
, &bi
->bi_flags
);
88 rgd
->rd_free_clone
= rgd
->rd_free
;
89 rgd
->rd_extfail_pt
= rgd
->rd_free
;
93 * gfs2_unpin - Unpin a buffer
94 * @sdp: the filesystem the buffer belongs to
95 * @bh: The buffer to unpin
97 * @flags: The inode dirty flags
101 static void gfs2_unpin(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
,
102 struct gfs2_trans
*tr
)
104 struct gfs2_bufdata
*bd
= bh
->b_private
;
106 BUG_ON(!buffer_uptodate(bh
));
107 BUG_ON(!buffer_pinned(bh
));
110 mark_buffer_dirty(bh
);
111 clear_buffer_pinned(bh
);
113 if (buffer_is_rgrp(bd
))
114 maybe_release_space(bd
);
116 spin_lock(&sdp
->sd_ail_lock
);
118 list_del(&bd
->bd_ail_st_list
);
121 struct gfs2_glock
*gl
= bd
->bd_gl
;
122 list_add(&bd
->bd_ail_gl_list
, &gl
->gl_ail_list
);
123 atomic_inc(&gl
->gl_ail_count
);
126 list_add(&bd
->bd_ail_st_list
, &tr
->tr_ail1_list
);
127 spin_unlock(&sdp
->sd_ail_lock
);
129 clear_bit(GLF_LFLUSH
, &bd
->bd_gl
->gl_flags
);
130 trace_gfs2_pin(bd
, 0);
132 atomic_dec(&sdp
->sd_log_pinned
);
135 static void gfs2_log_incr_head(struct gfs2_sbd
*sdp
)
137 BUG_ON((sdp
->sd_log_flush_head
== sdp
->sd_log_tail
) &&
138 (sdp
->sd_log_flush_head
!= sdp
->sd_log_head
));
140 if (++sdp
->sd_log_flush_head
== sdp
->sd_jdesc
->jd_blocks
)
141 sdp
->sd_log_flush_head
= 0;
144 u64
gfs2_log_bmap(struct gfs2_sbd
*sdp
)
146 unsigned int lbn
= sdp
->sd_log_flush_head
;
147 struct gfs2_journal_extent
*je
;
150 list_for_each_entry(je
, &sdp
->sd_jdesc
->extent_list
, list
) {
151 if ((lbn
>= je
->lblock
) && (lbn
< (je
->lblock
+ je
->blocks
))) {
152 block
= je
->dblock
+ lbn
- je
->lblock
;
153 gfs2_log_incr_head(sdp
);
162 * gfs2_end_log_write_bh - end log write of pagecache data with buffers
163 * @sdp: The superblock
165 * @error: The i/o status
167 * This finds the relevant buffers and unlocks them and sets the
168 * error flag according to the status of the i/o request. This is
169 * used when the log is writing data which has an in-place version
170 * that is pinned in the pagecache.
173 static void gfs2_end_log_write_bh(struct gfs2_sbd
*sdp
, struct bio_vec
*bvec
,
176 struct buffer_head
*bh
, *next
;
177 struct page
*page
= bvec
->bv_page
;
180 bh
= page_buffers(page
);
182 while (bh_offset(bh
) < bvec
->bv_offset
)
183 bh
= bh
->b_this_page
;
186 mark_buffer_write_io_error(bh
);
188 next
= bh
->b_this_page
;
196 * gfs2_end_log_write - end of i/o to the log
199 * Each bio_vec contains either data from the pagecache or data
200 * relating to the log itself. Here we iterate over the bio_vec
201 * array, processing both kinds of data.
205 static void gfs2_end_log_write(struct bio
*bio
)
207 struct gfs2_sbd
*sdp
= bio
->bi_private
;
208 struct bio_vec
*bvec
;
212 if (bio
->bi_status
) {
213 fs_err(sdp
, "Error %d writing to journal, jid=%u\n",
214 bio
->bi_status
, sdp
->sd_jdesc
->jd_jid
);
215 wake_up(&sdp
->sd_logd_waitq
);
218 bio_for_each_segment_all(bvec
, bio
, i
) {
219 page
= bvec
->bv_page
;
220 if (page_has_buffers(page
))
221 gfs2_end_log_write_bh(sdp
, bvec
, bio
->bi_status
);
223 mempool_free(page
, gfs2_page_pool
);
227 if (atomic_dec_and_test(&sdp
->sd_log_in_flight
))
228 wake_up(&sdp
->sd_log_flush_wait
);
232 * gfs2_log_submit_bio - Submit any pending log bio
233 * @biop: Address of the bio pointer
234 * @opf: REQ_OP | op_flags
236 * Submit any pending part-built or full bio to the block device. If
237 * there is no pending bio, then this is a no-op.
240 void gfs2_log_submit_bio(struct bio
**biop
, int opf
)
242 struct bio
*bio
= *biop
;
244 struct gfs2_sbd
*sdp
= bio
->bi_private
;
245 atomic_inc(&sdp
->sd_log_in_flight
);
253 * gfs2_log_alloc_bio - Allocate a bio
254 * @sdp: The super block
255 * @blkno: The device block number we want to write to
256 * @end_io: The bi_end_io callback
258 * Allocate a new bio, initialize it with the given parameters and return it.
260 * Returns: The newly allocated bio
263 static struct bio
*gfs2_log_alloc_bio(struct gfs2_sbd
*sdp
, u64 blkno
,
264 bio_end_io_t
*end_io
)
266 struct super_block
*sb
= sdp
->sd_vfs
;
267 struct bio
*bio
= bio_alloc(GFP_NOIO
, BIO_MAX_PAGES
);
269 bio
->bi_iter
.bi_sector
= blkno
* (sb
->s_blocksize
>> 9);
270 bio_set_dev(bio
, sb
->s_bdev
);
271 bio
->bi_end_io
= end_io
;
272 bio
->bi_private
= sdp
;
278 * gfs2_log_get_bio - Get cached log bio, or allocate a new one
279 * @sdp: The super block
280 * @blkno: The device block number we want to write to
281 * @bio: The bio to get or allocate
283 * @end_io: The bi_end_io callback
284 * @flush: Always flush the current bio and allocate a new one?
286 * If there is a cached bio, then if the next block number is sequential
287 * with the previous one, return it, otherwise flush the bio to the
288 * device. If there is no cached bio, or we just flushed it, then
289 * allocate a new one.
291 * Returns: The bio to use for log writes
294 static struct bio
*gfs2_log_get_bio(struct gfs2_sbd
*sdp
, u64 blkno
,
295 struct bio
**biop
, int op
,
296 bio_end_io_t
*end_io
, bool flush
)
298 struct bio
*bio
= *biop
;
303 nblk
= bio_end_sector(bio
);
304 nblk
>>= sdp
->sd_fsb2bb_shift
;
305 if (blkno
== nblk
&& !flush
)
307 gfs2_log_submit_bio(biop
, op
);
310 *biop
= gfs2_log_alloc_bio(sdp
, blkno
, end_io
);
315 * gfs2_log_write - write to log
316 * @sdp: the filesystem
317 * @page: the page to write
318 * @size: the size of the data to write
319 * @offset: the offset within the page
320 * @blkno: block number of the log entry
322 * Try and add the page segment to the current bio. If that fails,
323 * submit the current bio to the device and create a new one, and
324 * then add the page segment to that.
327 void gfs2_log_write(struct gfs2_sbd
*sdp
, struct page
*page
,
328 unsigned size
, unsigned offset
, u64 blkno
)
333 bio
= gfs2_log_get_bio(sdp
, blkno
, &sdp
->sd_log_bio
, REQ_OP_WRITE
,
334 gfs2_end_log_write
, false);
335 ret
= bio_add_page(bio
, page
, size
, offset
);
337 bio
= gfs2_log_get_bio(sdp
, blkno
, &sdp
->sd_log_bio
,
338 REQ_OP_WRITE
, gfs2_end_log_write
, true);
339 ret
= bio_add_page(bio
, page
, size
, offset
);
345 * gfs2_log_write_bh - write a buffer's content to the log
346 * @sdp: The super block
347 * @bh: The buffer pointing to the in-place location
349 * This writes the content of the buffer to the next available location
350 * in the log. The buffer will be unlocked once the i/o to the log has
354 static void gfs2_log_write_bh(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
)
356 gfs2_log_write(sdp
, bh
->b_page
, bh
->b_size
, bh_offset(bh
),
361 * gfs2_log_write_page - write one block stored in a page, into the log
362 * @sdp: The superblock
363 * @page: The struct page
365 * This writes the first block-sized part of the page into the log. Note
366 * that the page must have been allocated from the gfs2_page_pool mempool
367 * and that after this has been called, ownership has been transferred and
368 * the page may be freed at any time.
371 void gfs2_log_write_page(struct gfs2_sbd
*sdp
, struct page
*page
)
373 struct super_block
*sb
= sdp
->sd_vfs
;
374 gfs2_log_write(sdp
, page
, sb
->s_blocksize
, 0,
379 * gfs2_end_log_read - end I/O callback for reads from the log
382 * Simply unlock the pages in the bio. The main thread will wait on them and
383 * process them in order as necessary.
386 static void gfs2_end_log_read(struct bio
*bio
)
389 struct bio_vec
*bvec
;
392 bio_for_each_segment_all(bvec
, bio
, i
) {
393 page
= bvec
->bv_page
;
394 if (bio
->bi_status
) {
395 int err
= blk_status_to_errno(bio
->bi_status
);
398 mapping_set_error(page
->mapping
, err
);
407 * gfs2_jhead_pg_srch - Look for the journal head in a given page.
408 * @jd: The journal descriptor
409 * @page: The page to look in
411 * Returns: 1 if found, 0 otherwise.
414 static bool gfs2_jhead_pg_srch(struct gfs2_jdesc
*jd
,
415 struct gfs2_log_header_host
*head
,
418 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
419 struct gfs2_log_header_host
uninitialized_var(lh
);
420 void *kaddr
= kmap_atomic(page
);
424 for (offset
= 0; offset
< PAGE_SIZE
; offset
+= sdp
->sd_sb
.sb_bsize
) {
425 if (!__get_log_header(sdp
, kaddr
+ offset
, 0, &lh
)) {
426 if (lh
.lh_sequence
> head
->lh_sequence
)
434 kunmap_atomic(kaddr
);
439 * gfs2_jhead_process_page - Search/cleanup a page
440 * @jd: The journal descriptor
441 * @index: Index of the page to look into
442 * @done: If set, perform only cleanup, else search and set if found.
444 * Find the page with 'index' in the journal's mapping. Search the page for
445 * the journal head if requested (cleanup == false). Release refs on the
446 * page so the page cache can reclaim it (put_page() twice). We grabbed a
447 * reference on this page two times, first when we did a find_or_create_page()
448 * to obtain the page to add it to the bio and second when we do a
449 * find_get_page() here to get the page to wait on while I/O on it is being
451 * This function is also used to free up a page we might've grabbed but not
452 * used. Maybe we added it to a bio, but not submitted it for I/O. Or we
453 * submitted the I/O, but we already found the jhead so we only need to drop
454 * our references to the page.
457 static void gfs2_jhead_process_page(struct gfs2_jdesc
*jd
, unsigned long index
,
458 struct gfs2_log_header_host
*head
,
463 page
= find_get_page(jd
->jd_inode
->i_mapping
, index
);
464 wait_on_page_locked(page
);
470 *done
= gfs2_jhead_pg_srch(jd
, head
, page
);
472 put_page(page
); /* Once for find_get_page */
473 put_page(page
); /* Once more for find_or_create_page */
477 * gfs2_find_jhead - find the head of a log
478 * @jd: The journal descriptor
479 * @head: The log descriptor for the head of the log is returned here
481 * Do a search of a journal by reading it in large chunks using bios and find
482 * the valid log entry with the highest sequence number. (i.e. the log head)
484 * Returns: 0 on success, errno otherwise
487 int gfs2_find_jhead(struct gfs2_jdesc
*jd
, struct gfs2_log_header_host
*head
)
489 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
490 struct address_space
*mapping
= jd
->jd_inode
->i_mapping
;
491 struct gfs2_journal_extent
*je
;
492 u32 block
, read_idx
= 0, submit_idx
= 0, index
= 0;
493 int shift
= PAGE_SHIFT
- sdp
->sd_sb
.sb_bsize_shift
;
494 int blocks_per_page
= 1 << shift
, sz
, ret
= 0;
495 struct bio
*bio
= NULL
;
500 memset(head
, 0, sizeof(*head
));
501 if (list_empty(&jd
->extent_list
))
502 gfs2_map_journal_extents(sdp
, jd
);
504 since
= filemap_sample_wb_err(mapping
);
505 list_for_each_entry(je
, &jd
->extent_list
, list
) {
506 for (block
= 0; block
< je
->blocks
; block
+= blocks_per_page
) {
507 index
= (je
->lblock
+ block
) >> shift
;
509 page
= find_or_create_page(mapping
, index
, GFP_NOFS
);
517 sz
= bio_add_page(bio
, page
, PAGE_SIZE
, 0);
525 bio
= gfs2_log_alloc_bio(sdp
,
526 je
->dblock
+ (index
<< shift
),
528 bio
->bi_opf
= REQ_OP_READ
;
529 sz
= bio_add_page(bio
, page
, PAGE_SIZE
, 0);
530 gfs2_assert_warn(sdp
, sz
== PAGE_SIZE
);
533 if (submit_idx
<= read_idx
+ BIO_MAX_PAGES
) {
534 /* Keep at least one bio in flight */
538 gfs2_jhead_process_page(jd
, read_idx
++, head
, &done
);
540 goto out
; /* found */
547 while (read_idx
<= index
)
548 gfs2_jhead_process_page(jd
, read_idx
++, head
, &done
);
551 ret
= filemap_check_wb_err(mapping
, since
);
556 static struct page
*gfs2_get_log_desc(struct gfs2_sbd
*sdp
, u32 ld_type
,
557 u32 ld_length
, u32 ld_data1
)
559 struct page
*page
= mempool_alloc(gfs2_page_pool
, GFP_NOIO
);
560 struct gfs2_log_descriptor
*ld
= page_address(page
);
562 ld
->ld_header
.mh_magic
= cpu_to_be32(GFS2_MAGIC
);
563 ld
->ld_header
.mh_type
= cpu_to_be32(GFS2_METATYPE_LD
);
564 ld
->ld_header
.mh_format
= cpu_to_be32(GFS2_FORMAT_LD
);
565 ld
->ld_type
= cpu_to_be32(ld_type
);
566 ld
->ld_length
= cpu_to_be32(ld_length
);
567 ld
->ld_data1
= cpu_to_be32(ld_data1
);
572 static void gfs2_check_magic(struct buffer_head
*bh
)
577 clear_buffer_escaped(bh
);
578 kaddr
= kmap_atomic(bh
->b_page
);
579 ptr
= kaddr
+ bh_offset(bh
);
580 if (*ptr
== cpu_to_be32(GFS2_MAGIC
))
581 set_buffer_escaped(bh
);
582 kunmap_atomic(kaddr
);
585 static int blocknr_cmp(void *priv
, struct list_head
*a
, struct list_head
*b
)
587 struct gfs2_bufdata
*bda
, *bdb
;
589 bda
= list_entry(a
, struct gfs2_bufdata
, bd_list
);
590 bdb
= list_entry(b
, struct gfs2_bufdata
, bd_list
);
592 if (bda
->bd_bh
->b_blocknr
< bdb
->bd_bh
->b_blocknr
)
594 if (bda
->bd_bh
->b_blocknr
> bdb
->bd_bh
->b_blocknr
)
599 static void gfs2_before_commit(struct gfs2_sbd
*sdp
, unsigned int limit
,
600 unsigned int total
, struct list_head
*blist
,
603 struct gfs2_log_descriptor
*ld
;
604 struct gfs2_bufdata
*bd1
= NULL
, *bd2
;
611 list_sort(NULL
, blist
, blocknr_cmp
);
612 bd1
= bd2
= list_prepare_entry(bd1
, blist
, bd_list
);
617 gfs2_log_unlock(sdp
);
618 page
= gfs2_get_log_desc(sdp
,
619 is_databuf
? GFS2_LOG_DESC_JDATA
:
620 GFS2_LOG_DESC_METADATA
, num
+ 1, num
);
621 ld
= page_address(page
);
623 ptr
= (__be64
*)(ld
+ 1);
626 list_for_each_entry_continue(bd1
, blist
, bd_list
) {
627 *ptr
++ = cpu_to_be64(bd1
->bd_bh
->b_blocknr
);
629 gfs2_check_magic(bd1
->bd_bh
);
630 *ptr
++ = cpu_to_be64(buffer_escaped(bd1
->bd_bh
) ? 1 : 0);
636 gfs2_log_unlock(sdp
);
637 gfs2_log_write_page(sdp
, page
);
641 list_for_each_entry_continue(bd2
, blist
, bd_list
) {
643 gfs2_log_unlock(sdp
);
644 lock_buffer(bd2
->bd_bh
);
646 if (buffer_escaped(bd2
->bd_bh
)) {
648 page
= mempool_alloc(gfs2_page_pool
, GFP_NOIO
);
649 ptr
= page_address(page
);
650 kaddr
= kmap_atomic(bd2
->bd_bh
->b_page
);
651 memcpy(ptr
, kaddr
+ bh_offset(bd2
->bd_bh
),
653 kunmap_atomic(kaddr
);
655 clear_buffer_escaped(bd2
->bd_bh
);
656 unlock_buffer(bd2
->bd_bh
);
658 gfs2_log_write_page(sdp
, page
);
660 gfs2_log_write_bh(sdp
, bd2
->bd_bh
);
670 gfs2_log_unlock(sdp
);
673 static void buf_lo_before_commit(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
675 unsigned int limit
= buf_limit(sdp
); /* 503 for 4k blocks */
679 nbuf
= tr
->tr_num_buf_new
- tr
->tr_num_buf_rm
;
680 gfs2_before_commit(sdp
, limit
, nbuf
, &tr
->tr_buf
, 0);
683 static void buf_lo_after_commit(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
685 struct list_head
*head
;
686 struct gfs2_bufdata
*bd
;
692 while (!list_empty(head
)) {
693 bd
= list_entry(head
->next
, struct gfs2_bufdata
, bd_list
);
694 list_del_init(&bd
->bd_list
);
695 gfs2_unpin(sdp
, bd
->bd_bh
, tr
);
699 static void buf_lo_before_scan(struct gfs2_jdesc
*jd
,
700 struct gfs2_log_header_host
*head
, int pass
)
705 jd
->jd_found_blocks
= 0;
706 jd
->jd_replayed_blocks
= 0;
709 static int buf_lo_scan_elements(struct gfs2_jdesc
*jd
, unsigned int start
,
710 struct gfs2_log_descriptor
*ld
, __be64
*ptr
,
713 struct gfs2_inode
*ip
= GFS2_I(jd
->jd_inode
);
714 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
715 struct gfs2_glock
*gl
= ip
->i_gl
;
716 unsigned int blks
= be32_to_cpu(ld
->ld_data1
);
717 struct buffer_head
*bh_log
, *bh_ip
;
721 if (pass
!= 1 || be32_to_cpu(ld
->ld_type
) != GFS2_LOG_DESC_METADATA
)
724 gfs2_replay_incr_blk(jd
, &start
);
726 for (; blks
; gfs2_replay_incr_blk(jd
, &start
), blks
--) {
727 blkno
= be64_to_cpu(*ptr
++);
729 jd
->jd_found_blocks
++;
731 if (gfs2_revoke_check(jd
, blkno
, start
))
734 error
= gfs2_replay_read_block(jd
, start
, &bh_log
);
738 bh_ip
= gfs2_meta_new(gl
, blkno
);
739 memcpy(bh_ip
->b_data
, bh_log
->b_data
, bh_log
->b_size
);
741 if (gfs2_meta_check(sdp
, bh_ip
))
744 mark_buffer_dirty(bh_ip
);
752 jd
->jd_replayed_blocks
++;
759 * gfs2_meta_sync - Sync all buffers associated with a glock
764 static void gfs2_meta_sync(struct gfs2_glock
*gl
)
766 struct address_space
*mapping
= gfs2_glock2aspace(gl
);
767 struct gfs2_sbd
*sdp
= gl
->gl_name
.ln_sbd
;
771 mapping
= &sdp
->sd_aspace
;
773 filemap_fdatawrite(mapping
);
774 error
= filemap_fdatawait(mapping
);
777 gfs2_io_error(gl
->gl_name
.ln_sbd
);
780 static void buf_lo_after_scan(struct gfs2_jdesc
*jd
, int error
, int pass
)
782 struct gfs2_inode
*ip
= GFS2_I(jd
->jd_inode
);
783 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
786 gfs2_meta_sync(ip
->i_gl
);
792 gfs2_meta_sync(ip
->i_gl
);
794 fs_info(sdp
, "jid=%u: Replayed %u of %u blocks\n",
795 jd
->jd_jid
, jd
->jd_replayed_blocks
, jd
->jd_found_blocks
);
798 static void revoke_lo_before_commit(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
800 struct gfs2_meta_header
*mh
;
802 struct list_head
*head
= &sdp
->sd_log_le_revoke
;
803 struct gfs2_bufdata
*bd
;
807 gfs2_write_revokes(sdp
);
808 if (!sdp
->sd_log_num_revoke
)
811 length
= gfs2_struct2blk(sdp
, sdp
->sd_log_num_revoke
, sizeof(u64
));
812 page
= gfs2_get_log_desc(sdp
, GFS2_LOG_DESC_REVOKE
, length
, sdp
->sd_log_num_revoke
);
813 offset
= sizeof(struct gfs2_log_descriptor
);
815 list_for_each_entry(bd
, head
, bd_list
) {
816 sdp
->sd_log_num_revoke
--;
818 if (offset
+ sizeof(u64
) > sdp
->sd_sb
.sb_bsize
) {
820 gfs2_log_write_page(sdp
, page
);
821 page
= mempool_alloc(gfs2_page_pool
, GFP_NOIO
);
822 mh
= page_address(page
);
824 mh
->mh_magic
= cpu_to_be32(GFS2_MAGIC
);
825 mh
->mh_type
= cpu_to_be32(GFS2_METATYPE_LB
);
826 mh
->mh_format
= cpu_to_be32(GFS2_FORMAT_LB
);
827 offset
= sizeof(struct gfs2_meta_header
);
830 *(__be64
*)(page_address(page
) + offset
) = cpu_to_be64(bd
->bd_blkno
);
831 offset
+= sizeof(u64
);
833 gfs2_assert_withdraw(sdp
, !sdp
->sd_log_num_revoke
);
835 gfs2_log_write_page(sdp
, page
);
838 static void revoke_lo_after_commit(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
840 struct list_head
*head
= &sdp
->sd_log_le_revoke
;
841 struct gfs2_bufdata
*bd
;
842 struct gfs2_glock
*gl
;
844 while (!list_empty(head
)) {
845 bd
= list_entry(head
->next
, struct gfs2_bufdata
, bd_list
);
846 list_del_init(&bd
->bd_list
);
848 atomic_dec(&gl
->gl_revokes
);
849 clear_bit(GLF_LFLUSH
, &gl
->gl_flags
);
850 kmem_cache_free(gfs2_bufdata_cachep
, bd
);
854 static void revoke_lo_before_scan(struct gfs2_jdesc
*jd
,
855 struct gfs2_log_header_host
*head
, int pass
)
860 jd
->jd_found_revokes
= 0;
861 jd
->jd_replay_tail
= head
->lh_tail
;
864 static int revoke_lo_scan_elements(struct gfs2_jdesc
*jd
, unsigned int start
,
865 struct gfs2_log_descriptor
*ld
, __be64
*ptr
,
868 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
869 unsigned int blks
= be32_to_cpu(ld
->ld_length
);
870 unsigned int revokes
= be32_to_cpu(ld
->ld_data1
);
871 struct buffer_head
*bh
;
877 if (pass
!= 0 || be32_to_cpu(ld
->ld_type
) != GFS2_LOG_DESC_REVOKE
)
880 offset
= sizeof(struct gfs2_log_descriptor
);
882 for (; blks
; gfs2_replay_incr_blk(jd
, &start
), blks
--) {
883 error
= gfs2_replay_read_block(jd
, start
, &bh
);
888 gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_LB
);
890 while (offset
+ sizeof(u64
) <= sdp
->sd_sb
.sb_bsize
) {
891 blkno
= be64_to_cpu(*(__be64
*)(bh
->b_data
+ offset
));
893 error
= gfs2_revoke_add(jd
, blkno
, start
);
899 jd
->jd_found_revokes
++;
903 offset
+= sizeof(u64
);
907 offset
= sizeof(struct gfs2_meta_header
);
914 static void revoke_lo_after_scan(struct gfs2_jdesc
*jd
, int error
, int pass
)
916 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
919 gfs2_revoke_clean(jd
);
925 fs_info(sdp
, "jid=%u: Found %u revoke tags\n",
926 jd
->jd_jid
, jd
->jd_found_revokes
);
928 gfs2_revoke_clean(jd
);
932 * databuf_lo_before_commit - Scan the data buffers, writing as we go
936 static void databuf_lo_before_commit(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
938 unsigned int limit
= databuf_limit(sdp
);
942 nbuf
= tr
->tr_num_databuf_new
- tr
->tr_num_databuf_rm
;
943 gfs2_before_commit(sdp
, limit
, nbuf
, &tr
->tr_databuf
, 1);
946 static int databuf_lo_scan_elements(struct gfs2_jdesc
*jd
, unsigned int start
,
947 struct gfs2_log_descriptor
*ld
,
948 __be64
*ptr
, int pass
)
950 struct gfs2_inode
*ip
= GFS2_I(jd
->jd_inode
);
951 struct gfs2_glock
*gl
= ip
->i_gl
;
952 unsigned int blks
= be32_to_cpu(ld
->ld_data1
);
953 struct buffer_head
*bh_log
, *bh_ip
;
958 if (pass
!= 1 || be32_to_cpu(ld
->ld_type
) != GFS2_LOG_DESC_JDATA
)
961 gfs2_replay_incr_blk(jd
, &start
);
962 for (; blks
; gfs2_replay_incr_blk(jd
, &start
), blks
--) {
963 blkno
= be64_to_cpu(*ptr
++);
964 esc
= be64_to_cpu(*ptr
++);
966 jd
->jd_found_blocks
++;
968 if (gfs2_revoke_check(jd
, blkno
, start
))
971 error
= gfs2_replay_read_block(jd
, start
, &bh_log
);
975 bh_ip
= gfs2_meta_new(gl
, blkno
);
976 memcpy(bh_ip
->b_data
, bh_log
->b_data
, bh_log
->b_size
);
980 __be32
*eptr
= (__be32
*)bh_ip
->b_data
;
981 *eptr
= cpu_to_be32(GFS2_MAGIC
);
983 mark_buffer_dirty(bh_ip
);
988 jd
->jd_replayed_blocks
++;
994 /* FIXME: sort out accounting for log blocks etc. */
996 static void databuf_lo_after_scan(struct gfs2_jdesc
*jd
, int error
, int pass
)
998 struct gfs2_inode
*ip
= GFS2_I(jd
->jd_inode
);
999 struct gfs2_sbd
*sdp
= GFS2_SB(jd
->jd_inode
);
1002 gfs2_meta_sync(ip
->i_gl
);
1009 gfs2_meta_sync(ip
->i_gl
);
1011 fs_info(sdp
, "jid=%u: Replayed %u of %u data blocks\n",
1012 jd
->jd_jid
, jd
->jd_replayed_blocks
, jd
->jd_found_blocks
);
1015 static void databuf_lo_after_commit(struct gfs2_sbd
*sdp
, struct gfs2_trans
*tr
)
1017 struct list_head
*head
;
1018 struct gfs2_bufdata
*bd
;
1023 head
= &tr
->tr_databuf
;
1024 while (!list_empty(head
)) {
1025 bd
= list_entry(head
->next
, struct gfs2_bufdata
, bd_list
);
1026 list_del_init(&bd
->bd_list
);
1027 gfs2_unpin(sdp
, bd
->bd_bh
, tr
);
1032 const struct gfs2_log_operations gfs2_buf_lops
= {
1033 .lo_before_commit
= buf_lo_before_commit
,
1034 .lo_after_commit
= buf_lo_after_commit
,
1035 .lo_before_scan
= buf_lo_before_scan
,
1036 .lo_scan_elements
= buf_lo_scan_elements
,
1037 .lo_after_scan
= buf_lo_after_scan
,
1041 const struct gfs2_log_operations gfs2_revoke_lops
= {
1042 .lo_before_commit
= revoke_lo_before_commit
,
1043 .lo_after_commit
= revoke_lo_after_commit
,
1044 .lo_before_scan
= revoke_lo_before_scan
,
1045 .lo_scan_elements
= revoke_lo_scan_elements
,
1046 .lo_after_scan
= revoke_lo_after_scan
,
1047 .lo_name
= "revoke",
1050 const struct gfs2_log_operations gfs2_databuf_lops
= {
1051 .lo_before_commit
= databuf_lo_before_commit
,
1052 .lo_after_commit
= databuf_lo_after_commit
,
1053 .lo_scan_elements
= databuf_lo_scan_elements
,
1054 .lo_after_scan
= databuf_lo_after_scan
,
1055 .lo_name
= "databuf",
1058 const struct gfs2_log_operations
*gfs2_log_ops
[] = {