raid5-cache: refactor bio allocation
Split out a helper to allocate a bio for log writes. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Shaohua Li <shli@fb.com> Signed-off-by: NeilBrown <neilb@suse.com>
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22581f58ed
Коммит
b349feb36c
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@ -276,11 +276,25 @@ static void r5l_submit_current_io(struct r5l_log *log)
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}
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}
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static struct bio *r5l_bio_alloc(struct r5l_log *log, struct r5l_io_unit *io)
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{
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struct bio *bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL, BIO_MAX_PAGES);
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bio->bi_rw = WRITE;
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bio->bi_bdev = log->rdev->bdev;
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bio->bi_iter.bi_sector = log->log_start;
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bio->bi_end_io = r5l_log_endio;
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bio->bi_private = io;
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bio_list_add(&io->bios, bio);
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atomic_inc(&io->pending_io);
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return bio;
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}
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static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log)
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{
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struct r5l_io_unit *io;
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struct r5l_meta_block *block;
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struct bio *bio;
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io = r5l_alloc_io_unit(log);
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@ -294,17 +308,8 @@ static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log)
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io->meta_offset = sizeof(struct r5l_meta_block);
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io->seq = log->seq;
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bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL, BIO_MAX_PAGES);
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io->current_bio = bio;
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bio->bi_rw = WRITE;
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bio->bi_bdev = log->rdev->bdev;
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bio->bi_iter.bi_sector = log->log_start;
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bio_add_page(bio, io->meta_page, PAGE_SIZE, 0);
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bio->bi_end_io = r5l_log_endio;
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bio->bi_private = io;
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bio_list_add(&io->bios, bio);
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atomic_inc(&io->pending_io);
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io->current_bio = r5l_bio_alloc(log, io);
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bio_add_page(io->current_bio, io->meta_page, PAGE_SIZE, 0);
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log->seq++;
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log->log_start = r5l_ring_add(log, log->log_start, BLOCK_SECTORS);
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@ -358,19 +363,9 @@ static void r5l_append_payload_page(struct r5l_log *log, struct page *page)
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struct r5l_io_unit *io = log->current_io;
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alloc_bio:
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if (!io->current_bio) {
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struct bio *bio;
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if (!io->current_bio)
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io->current_bio = r5l_bio_alloc(log, io);
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bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL, BIO_MAX_PAGES);
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bio->bi_rw = WRITE;
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bio->bi_bdev = log->rdev->bdev;
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bio->bi_iter.bi_sector = log->log_start;
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bio->bi_end_io = r5l_log_endio;
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bio->bi_private = io;
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bio_list_add(&io->bios, bio);
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atomic_inc(&io->pending_io);
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io->current_bio = bio;
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}
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if (!bio_add_page(io->current_bio, page, PAGE_SIZE, 0)) {
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io->current_bio = NULL;
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goto alloc_bio;
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