1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
7 #include <linux/sched.h>
8 #include <linux/slab.h>
9 #include <linux/spinlock.h>
10 #include <linux/completion.h>
11 #include <linux/buffer_head.h>
12 #include <linux/mempool.h>
13 #include <linux/gfs2_ondisk.h>
14 #include <linux/bio.h>
16 #include <linux/list_sort.h>
17 #include <linux/blkdev.h>
33 #include "trace_gfs2.h"
36 * gfs2_pin - Pin a buffer in memory
37 * @sdp: The superblock
38 * @bh: The buffer to be pinned
40 * The log lock must be held when calling this function
42 void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
44 struct gfs2_bufdata *bd;
46 BUG_ON(!current->journal_info);
48 clear_buffer_dirty(bh);
49 if (test_set_buffer_pinned(bh))
50 gfs2_assert_withdraw(sdp, 0);
51 if (!buffer_uptodate(bh))
52 gfs2_io_error_bh_wd(sdp, bh);
54 /* If this buffer is in the AIL and it has already been written
55 * to in-place disk block, remove it from the AIL.
57 spin_lock(&sdp->sd_ail_lock);
59 list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list);
60 spin_unlock(&sdp->sd_ail_lock);
62 atomic_inc(&sdp->sd_log_pinned);
63 trace_gfs2_pin(bd, 1);
66 static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
68 return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP;
71 static void maybe_release_space(struct gfs2_bufdata *bd)
73 struct gfs2_glock *gl = bd->bd_gl;
74 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
75 struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
76 unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
77 struct gfs2_bitmap *bi = rgd->rd_bits + index;
79 if (bi->bi_clone == NULL)
81 if (sdp->sd_args.ar_discard)
82 gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
83 memcpy(bi->bi_clone + bi->bi_offset,
84 bd->bd_bh->b_data + bi->bi_offset, bi->bi_bytes);
85 clear_bit(GBF_FULL, &bi->bi_flags);
86 rgd->rd_free_clone = rgd->rd_free;
87 rgd->rd_extfail_pt = rgd->rd_free;
91 * gfs2_unpin - Unpin a buffer
92 * @sdp: the filesystem the buffer belongs to
93 * @bh: The buffer to unpin
95 * @flags: The inode dirty flags
99 static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
100 struct gfs2_trans *tr)
102 struct gfs2_bufdata *bd = bh->b_private;
104 BUG_ON(!buffer_uptodate(bh));
105 BUG_ON(!buffer_pinned(bh));
108 mark_buffer_dirty(bh);
109 clear_buffer_pinned(bh);
111 if (buffer_is_rgrp(bd))
112 maybe_release_space(bd);
114 spin_lock(&sdp->sd_ail_lock);
116 list_del(&bd->bd_ail_st_list);
119 struct gfs2_glock *gl = bd->bd_gl;
120 list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
121 atomic_inc(&gl->gl_ail_count);
124 list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list);
125 spin_unlock(&sdp->sd_ail_lock);
127 clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
128 trace_gfs2_pin(bd, 0);
130 atomic_dec(&sdp->sd_log_pinned);
133 void gfs2_log_incr_head(struct gfs2_sbd *sdp)
135 BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
136 (sdp->sd_log_flush_head != sdp->sd_log_head));
138 if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks)
139 sdp->sd_log_flush_head = 0;
142 u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lblock)
144 struct gfs2_journal_extent *je;
146 list_for_each_entry(je, &jd->extent_list, list) {
147 if (lblock >= je->lblock && lblock < je->lblock + je->blocks)
148 return je->dblock + lblock - je->lblock;
155 * gfs2_end_log_write_bh - end log write of pagecache data with buffers
156 * @sdp: The superblock
158 * @error: The i/o status
160 * This finds the relevant buffers and unlocks them and sets the
161 * error flag according to the status of the i/o request. This is
162 * used when the log is writing data which has an in-place version
163 * that is pinned in the pagecache.
166 static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp,
167 struct bio_vec *bvec,
170 struct buffer_head *bh, *next;
171 struct page *page = bvec->bv_page;
174 bh = page_buffers(page);
176 while (bh_offset(bh) < bvec->bv_offset)
177 bh = bh->b_this_page;
180 mark_buffer_write_io_error(bh);
182 next = bh->b_this_page;
190 * gfs2_end_log_write - end of i/o to the log
193 * Each bio_vec contains either data from the pagecache or data
194 * relating to the log itself. Here we iterate over the bio_vec
195 * array, processing both kinds of data.
199 static void gfs2_end_log_write(struct bio *bio)
201 struct gfs2_sbd *sdp = bio->bi_private;
202 struct bio_vec *bvec;
204 struct bvec_iter_all iter_all;
206 if (bio->bi_status) {
207 if (!cmpxchg(&sdp->sd_log_error, 0, (int)bio->bi_status))
208 fs_err(sdp, "Error %d writing to journal, jid=%u\n",
209 bio->bi_status, sdp->sd_jdesc->jd_jid);
210 gfs2_withdraw_delayed(sdp);
211 /* prevent more writes to the journal */
212 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
213 wake_up(&sdp->sd_logd_waitq);
216 bio_for_each_segment_all(bvec, bio, iter_all) {
217 page = bvec->bv_page;
218 if (page_has_buffers(page))
219 gfs2_end_log_write_bh(sdp, bvec, bio->bi_status);
221 mempool_free(page, gfs2_page_pool);
225 if (atomic_dec_and_test(&sdp->sd_log_in_flight))
226 wake_up(&sdp->sd_log_flush_wait);
230 * gfs2_log_submit_bio - Submit any pending log bio
231 * @biop: Address of the bio pointer
232 * @opf: REQ_OP | op_flags
234 * Submit any pending part-built or full bio to the block device. If
235 * there is no pending bio, then this is a no-op.
238 void gfs2_log_submit_bio(struct bio **biop, int opf)
240 struct bio *bio = *biop;
242 struct gfs2_sbd *sdp = bio->bi_private;
243 atomic_inc(&sdp->sd_log_in_flight);
251 * gfs2_log_alloc_bio - Allocate a bio
252 * @sdp: The super block
253 * @blkno: The device block number we want to write to
254 * @end_io: The bi_end_io callback
256 * Allocate a new bio, initialize it with the given parameters and return it.
258 * Returns: The newly allocated bio
261 static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno,
262 bio_end_io_t *end_io)
264 struct super_block *sb = sdp->sd_vfs;
265 struct bio *bio = bio_alloc(GFP_NOIO, BIO_MAX_PAGES);
267 bio->bi_iter.bi_sector = blkno << sdp->sd_fsb2bb_shift;
268 bio_set_dev(bio, sb->s_bdev);
269 bio->bi_end_io = end_io;
270 bio->bi_private = sdp;
276 * gfs2_log_get_bio - Get cached log bio, or allocate a new one
277 * @sdp: The super block
278 * @blkno: The device block number we want to write to
279 * @bio: The bio to get or allocate
281 * @end_io: The bi_end_io callback
282 * @flush: Always flush the current bio and allocate a new one?
284 * If there is a cached bio, then if the next block number is sequential
285 * with the previous one, return it, otherwise flush the bio to the
286 * device. If there is no cached bio, or we just flushed it, then
287 * allocate a new one.
289 * Returns: The bio to use for log writes
292 static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno,
293 struct bio **biop, int op,
294 bio_end_io_t *end_io, bool flush)
296 struct bio *bio = *biop;
301 nblk = bio_end_sector(bio);
302 nblk >>= sdp->sd_fsb2bb_shift;
303 if (blkno == nblk && !flush)
305 gfs2_log_submit_bio(biop, op);
308 *biop = gfs2_log_alloc_bio(sdp, blkno, end_io);
313 * gfs2_log_write - write to log
314 * @sdp: the filesystem
315 * @page: the page to write
316 * @size: the size of the data to write
317 * @offset: the offset within the page
318 * @blkno: block number of the log entry
320 * Try and add the page segment to the current bio. If that fails,
321 * submit the current bio to the device and create a new one, and
322 * then add the page segment to that.
325 void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
326 unsigned size, unsigned offset, u64 blkno)
331 bio = gfs2_log_get_bio(sdp, blkno, &sdp->sd_log_bio, REQ_OP_WRITE,
332 gfs2_end_log_write, false);
333 ret = bio_add_page(bio, page, size, offset);
335 bio = gfs2_log_get_bio(sdp, blkno, &sdp->sd_log_bio,
336 REQ_OP_WRITE, gfs2_end_log_write, true);
337 ret = bio_add_page(bio, page, size, offset);
343 * gfs2_log_write_bh - write a buffer's content to the log
344 * @sdp: The super block
345 * @bh: The buffer pointing to the in-place location
347 * This writes the content of the buffer to the next available location
348 * in the log. The buffer will be unlocked once the i/o to the log has
352 static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh)
356 dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head);
357 gfs2_log_incr_head(sdp);
358 gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh), dblock);
362 * gfs2_log_write_page - write one block stored in a page, into the log
363 * @sdp: The superblock
364 * @page: The struct page
366 * This writes the first block-sized part of the page into the log. Note
367 * that the page must have been allocated from the gfs2_page_pool mempool
368 * and that after this has been called, ownership has been transferred and
369 * the page may be freed at any time.
372 void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
374 struct super_block *sb = sdp->sd_vfs;
377 dblock = gfs2_log_bmap(sdp->sd_jdesc, sdp->sd_log_flush_head);
378 gfs2_log_incr_head(sdp);
379 gfs2_log_write(sdp, page, sb->s_blocksize, 0, dblock);
383 * gfs2_end_log_read - end I/O callback for reads from the log
386 * Simply unlock the pages in the bio. The main thread will wait on them and
387 * process them in order as necessary.
390 static void gfs2_end_log_read(struct bio *bio)
393 struct bio_vec *bvec;
394 struct bvec_iter_all iter_all;
396 bio_for_each_segment_all(bvec, bio, iter_all) {
397 page = bvec->bv_page;
398 if (bio->bi_status) {
399 int err = blk_status_to_errno(bio->bi_status);
402 mapping_set_error(page->mapping, err);
411 * gfs2_jhead_pg_srch - Look for the journal head in a given page.
412 * @jd: The journal descriptor
413 * @page: The page to look in
415 * Returns: 1 if found, 0 otherwise.
418 static bool gfs2_jhead_pg_srch(struct gfs2_jdesc *jd,
419 struct gfs2_log_header_host *head,
422 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
423 struct gfs2_log_header_host lh;
424 void *kaddr = kmap_atomic(page);
428 for (offset = 0; offset < PAGE_SIZE; offset += sdp->sd_sb.sb_bsize) {
429 if (!__get_log_header(sdp, kaddr + offset, 0, &lh)) {
430 if (lh.lh_sequence >= head->lh_sequence)
438 kunmap_atomic(kaddr);
443 * gfs2_jhead_process_page - Search/cleanup a page
444 * @jd: The journal descriptor
445 * @index: Index of the page to look into
446 * @done: If set, perform only cleanup, else search and set if found.
448 * Find the page with 'index' in the journal's mapping. Search the page for
449 * the journal head if requested (cleanup == false). Release refs on the
450 * page so the page cache can reclaim it (put_page() twice). We grabbed a
451 * reference on this page two times, first when we did a find_or_create_page()
452 * to obtain the page to add it to the bio and second when we do a
453 * find_get_page() here to get the page to wait on while I/O on it is being
455 * This function is also used to free up a page we might've grabbed but not
456 * used. Maybe we added it to a bio, but not submitted it for I/O. Or we
457 * submitted the I/O, but we already found the jhead so we only need to drop
458 * our references to the page.
461 static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index,
462 struct gfs2_log_header_host *head,
467 page = find_get_page(jd->jd_inode->i_mapping, index);
468 wait_on_page_locked(page);
474 *done = gfs2_jhead_pg_srch(jd, head, page);
476 put_page(page); /* Once for find_get_page */
477 put_page(page); /* Once more for find_or_create_page */
480 static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs)
484 new = bio_alloc(GFP_NOIO, nr_iovecs);
485 bio_copy_dev(new, prev);
486 new->bi_iter.bi_sector = bio_end_sector(prev);
487 new->bi_opf = prev->bi_opf;
488 new->bi_write_hint = prev->bi_write_hint;
489 bio_chain(new, prev);
495 * gfs2_find_jhead - find the head of a log
496 * @jd: The journal descriptor
497 * @head: The log descriptor for the head of the log is returned here
499 * Do a search of a journal by reading it in large chunks using bios and find
500 * the valid log entry with the highest sequence number. (i.e. the log head)
502 * Returns: 0 on success, errno otherwise
504 int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head,
507 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
508 struct address_space *mapping = jd->jd_inode->i_mapping;
509 unsigned int block = 0, blocks_submitted = 0, blocks_read = 0;
510 unsigned int bsize = sdp->sd_sb.sb_bsize, off;
511 unsigned int bsize_shift = sdp->sd_sb.sb_bsize_shift;
512 unsigned int shift = PAGE_SHIFT - bsize_shift;
513 unsigned int max_blocks = 2 * 1024 * 1024 >> bsize_shift;
514 struct gfs2_journal_extent *je;
516 struct bio *bio = NULL;
517 struct page *page = NULL;
521 memset(head, 0, sizeof(*head));
522 if (list_empty(&jd->extent_list))
523 gfs2_map_journal_extents(sdp, jd);
525 since = filemap_sample_wb_err(mapping);
526 list_for_each_entry(je, &jd->extent_list, list) {
527 u64 dblock = je->dblock;
529 for (; block < je->lblock + je->blocks; block++, dblock++) {
531 page = find_or_create_page(mapping,
532 block >> shift, GFP_NOFS);
541 if (bio && (off || block < blocks_submitted + max_blocks)) {
542 sector_t sector = dblock << sdp->sd_fsb2bb_shift;
544 if (bio_end_sector(bio) == sector) {
545 sz = bio_add_page(bio, page, bsize, off);
550 unsigned int blocks =
551 (PAGE_SIZE - off) >> bsize_shift;
553 bio = gfs2_chain_bio(bio, blocks);
554 goto add_block_to_new_bio;
559 blocks_submitted = block;
563 bio = gfs2_log_alloc_bio(sdp, dblock, gfs2_end_log_read);
564 bio->bi_opf = REQ_OP_READ;
565 add_block_to_new_bio:
566 sz = bio_add_page(bio, page, bsize, off);
570 if (off == PAGE_SIZE)
572 if (blocks_submitted <= blocks_read + max_blocks) {
573 /* Keep at least one bio in flight */
577 gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done);
578 blocks_read += PAGE_SIZE >> bsize_shift;
580 goto out; /* found */
587 while (blocks_read < block) {
588 gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done);
589 blocks_read += PAGE_SIZE >> bsize_shift;
593 ret = filemap_check_wb_err(mapping, since);
596 truncate_inode_pages(mapping, 0);
601 static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type,
602 u32 ld_length, u32 ld_data1)
604 struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
605 struct gfs2_log_descriptor *ld = page_address(page);
607 ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
608 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
609 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
610 ld->ld_type = cpu_to_be32(ld_type);
611 ld->ld_length = cpu_to_be32(ld_length);
612 ld->ld_data1 = cpu_to_be32(ld_data1);
617 static void gfs2_check_magic(struct buffer_head *bh)
622 clear_buffer_escaped(bh);
623 kaddr = kmap_atomic(bh->b_page);
624 ptr = kaddr + bh_offset(bh);
625 if (*ptr == cpu_to_be32(GFS2_MAGIC))
626 set_buffer_escaped(bh);
627 kunmap_atomic(kaddr);
630 static int blocknr_cmp(void *priv, const struct list_head *a,
631 const struct list_head *b)
633 struct gfs2_bufdata *bda, *bdb;
635 bda = list_entry(a, struct gfs2_bufdata, bd_list);
636 bdb = list_entry(b, struct gfs2_bufdata, bd_list);
638 if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr)
640 if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr)
645 static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
646 unsigned int total, struct list_head *blist,
649 struct gfs2_log_descriptor *ld;
650 struct gfs2_bufdata *bd1 = NULL, *bd2;
657 list_sort(NULL, blist, blocknr_cmp);
658 bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list);
663 gfs2_log_unlock(sdp);
664 page = gfs2_get_log_desc(sdp,
665 is_databuf ? GFS2_LOG_DESC_JDATA :
666 GFS2_LOG_DESC_METADATA, num + 1, num);
667 ld = page_address(page);
669 ptr = (__be64 *)(ld + 1);
672 list_for_each_entry_continue(bd1, blist, bd_list) {
673 *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
675 gfs2_check_magic(bd1->bd_bh);
676 *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0);
682 gfs2_log_unlock(sdp);
683 gfs2_log_write_page(sdp, page);
687 list_for_each_entry_continue(bd2, blist, bd_list) {
689 gfs2_log_unlock(sdp);
690 lock_buffer(bd2->bd_bh);
692 if (buffer_escaped(bd2->bd_bh)) {
694 page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
695 ptr = page_address(page);
696 kaddr = kmap_atomic(bd2->bd_bh->b_page);
697 memcpy(ptr, kaddr + bh_offset(bd2->bd_bh),
699 kunmap_atomic(kaddr);
701 clear_buffer_escaped(bd2->bd_bh);
702 unlock_buffer(bd2->bd_bh);
704 gfs2_log_write_page(sdp, page);
706 gfs2_log_write_bh(sdp, bd2->bd_bh);
716 gfs2_log_unlock(sdp);
719 static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
721 unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */
725 nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm;
726 gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0);
729 static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
731 struct list_head *head;
732 struct gfs2_bufdata *bd;
738 while (!list_empty(head)) {
739 bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
740 list_del_init(&bd->bd_list);
741 gfs2_unpin(sdp, bd->bd_bh, tr);
745 static void buf_lo_before_scan(struct gfs2_jdesc *jd,
746 struct gfs2_log_header_host *head, int pass)
751 jd->jd_found_blocks = 0;
752 jd->jd_replayed_blocks = 0;
755 static int buf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
756 struct gfs2_log_descriptor *ld, __be64 *ptr,
759 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
760 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
761 struct gfs2_glock *gl = ip->i_gl;
762 unsigned int blks = be32_to_cpu(ld->ld_data1);
763 struct buffer_head *bh_log, *bh_ip;
767 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
770 gfs2_replay_incr_blk(jd, &start);
772 for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) {
773 blkno = be64_to_cpu(*ptr++);
775 jd->jd_found_blocks++;
777 if (gfs2_revoke_check(jd, blkno, start))
780 error = gfs2_replay_read_block(jd, start, &bh_log);
784 bh_ip = gfs2_meta_new(gl, blkno);
785 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
787 if (gfs2_meta_check(sdp, bh_ip))
790 struct gfs2_meta_header *mh =
791 (struct gfs2_meta_header *)bh_ip->b_data;
793 if (mh->mh_type == cpu_to_be32(GFS2_METATYPE_RG)) {
794 struct gfs2_rgrpd *rgd;
796 rgd = gfs2_blk2rgrpd(sdp, blkno, false);
797 if (rgd && rgd->rd_addr == blkno &&
798 rgd->rd_bits && rgd->rd_bits->bi_bh) {
799 fs_info(sdp, "Replaying 0x%llx but we "
800 "already have a bh!\n",
801 (unsigned long long)blkno);
802 fs_info(sdp, "busy:%d, pinned:%d\n",
803 buffer_busy(rgd->rd_bits->bi_bh) ? 1 : 0,
804 buffer_pinned(rgd->rd_bits->bi_bh));
805 gfs2_dump_glock(NULL, rgd->rd_gl, true);
808 mark_buffer_dirty(bh_ip);
816 jd->jd_replayed_blocks++;
822 static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
824 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
825 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
828 gfs2_inode_metasync(ip->i_gl);
834 gfs2_inode_metasync(ip->i_gl);
836 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
837 jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks);
840 static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
842 struct gfs2_meta_header *mh;
844 struct list_head *head = &sdp->sd_log_revokes;
845 struct gfs2_bufdata *bd;
849 gfs2_write_revokes(sdp);
850 if (!sdp->sd_log_num_revoke)
853 length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke);
854 page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
855 offset = sizeof(struct gfs2_log_descriptor);
857 list_for_each_entry(bd, head, bd_list) {
858 sdp->sd_log_num_revoke--;
860 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
862 gfs2_log_write_page(sdp, page);
863 page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
864 mh = page_address(page);
866 mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
867 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
868 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
869 offset = sizeof(struct gfs2_meta_header);
872 *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno);
873 offset += sizeof(u64);
875 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
877 gfs2_log_write_page(sdp, page);
880 static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
882 struct list_head *head = &sdp->sd_log_revokes;
883 struct gfs2_bufdata *bd;
884 struct gfs2_glock *gl;
886 while (!list_empty(head)) {
887 bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
888 list_del_init(&bd->bd_list);
890 gfs2_glock_remove_revoke(gl);
891 kmem_cache_free(gfs2_bufdata_cachep, bd);
895 static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
896 struct gfs2_log_header_host *head, int pass)
901 jd->jd_found_revokes = 0;
902 jd->jd_replay_tail = head->lh_tail;
905 static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
906 struct gfs2_log_descriptor *ld, __be64 *ptr,
909 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
910 unsigned int blks = be32_to_cpu(ld->ld_length);
911 unsigned int revokes = be32_to_cpu(ld->ld_data1);
912 struct buffer_head *bh;
918 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
921 offset = sizeof(struct gfs2_log_descriptor);
923 for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) {
924 error = gfs2_replay_read_block(jd, start, &bh);
929 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
931 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
932 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
934 error = gfs2_revoke_add(jd, blkno, start);
940 jd->jd_found_revokes++;
944 offset += sizeof(u64);
948 offset = sizeof(struct gfs2_meta_header);
955 static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
957 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
960 gfs2_revoke_clean(jd);
966 fs_info(sdp, "jid=%u: Found %u revoke tags\n",
967 jd->jd_jid, jd->jd_found_revokes);
969 gfs2_revoke_clean(jd);
973 * databuf_lo_before_commit - Scan the data buffers, writing as we go
977 static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
979 unsigned int limit = databuf_limit(sdp);
983 nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm;
984 gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1);
987 static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
988 struct gfs2_log_descriptor *ld,
989 __be64 *ptr, int pass)
991 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
992 struct gfs2_glock *gl = ip->i_gl;
993 unsigned int blks = be32_to_cpu(ld->ld_data1);
994 struct buffer_head *bh_log, *bh_ip;
999 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
1002 gfs2_replay_incr_blk(jd, &start);
1003 for (; blks; gfs2_replay_incr_blk(jd, &start), blks--) {
1004 blkno = be64_to_cpu(*ptr++);
1005 esc = be64_to_cpu(*ptr++);
1007 jd->jd_found_blocks++;
1009 if (gfs2_revoke_check(jd, blkno, start))
1012 error = gfs2_replay_read_block(jd, start, &bh_log);
1016 bh_ip = gfs2_meta_new(gl, blkno);
1017 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
1021 __be32 *eptr = (__be32 *)bh_ip->b_data;
1022 *eptr = cpu_to_be32(GFS2_MAGIC);
1024 mark_buffer_dirty(bh_ip);
1029 jd->jd_replayed_blocks++;
1035 /* FIXME: sort out accounting for log blocks etc. */
1037 static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
1039 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
1040 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
1043 gfs2_inode_metasync(ip->i_gl);
1050 gfs2_inode_metasync(ip->i_gl);
1052 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
1053 jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks);
1056 static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
1058 struct list_head *head;
1059 struct gfs2_bufdata *bd;
1064 head = &tr->tr_databuf;
1065 while (!list_empty(head)) {
1066 bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
1067 list_del_init(&bd->bd_list);
1068 gfs2_unpin(sdp, bd->bd_bh, tr);
1073 static const struct gfs2_log_operations gfs2_buf_lops = {
1074 .lo_before_commit = buf_lo_before_commit,
1075 .lo_after_commit = buf_lo_after_commit,
1076 .lo_before_scan = buf_lo_before_scan,
1077 .lo_scan_elements = buf_lo_scan_elements,
1078 .lo_after_scan = buf_lo_after_scan,
1082 static const struct gfs2_log_operations gfs2_revoke_lops = {
1083 .lo_before_commit = revoke_lo_before_commit,
1084 .lo_after_commit = revoke_lo_after_commit,
1085 .lo_before_scan = revoke_lo_before_scan,
1086 .lo_scan_elements = revoke_lo_scan_elements,
1087 .lo_after_scan = revoke_lo_after_scan,
1088 .lo_name = "revoke",
1091 static const struct gfs2_log_operations gfs2_databuf_lops = {
1092 .lo_before_commit = databuf_lo_before_commit,
1093 .lo_after_commit = databuf_lo_after_commit,
1094 .lo_scan_elements = databuf_lo_scan_elements,
1095 .lo_after_scan = databuf_lo_after_scan,
1096 .lo_name = "databuf",
1099 const struct gfs2_log_operations *gfs2_log_ops[] = {