From 6915ea9d8dd8690570fe4a9864b898447a4f3da0 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Fri, 30 Jun 2017 17:19:02 +0800 Subject: [PATCH] f2fs: introduce __check_sit_bitmap After we introduce discard thread, discard command can be issued concurrently with data allocating, this patch adds new function to heck sit bitmap to ensure that userdata was invalid in which on-going discard command covered. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/segment.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 6eaa98ea8ec6..4c246e351103 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -763,6 +763,30 @@ static void f2fs_submit_discard_endio(struct bio *bio) bio_put(bio); } +void __check_sit_bitmap(struct f2fs_sb_info *sbi, + block_t start, block_t end) +{ +#ifdef CONFIG_F2FS_CHECK_FS + struct seg_entry *sentry; + unsigned int segno; + block_t blk = start; + unsigned long offset, size, max_blocks = sbi->blocks_per_seg; + unsigned long *map; + + while (blk < end) { + segno = GET_SEGNO(sbi, blk); + sentry = get_seg_entry(sbi, segno); + offset = GET_BLKOFF_FROM_SEG0(sbi, blk); + + size = min((unsigned long)(end - blk), max_blocks); + map = (unsigned long *)(sentry->cur_valid_map); + offset = __find_rev_next_bit(map, size, offset); + f2fs_bug_on(sbi, offset != size); + blk += size; + } +#endif +} + /* this function is copied from blkdev_issue_discard from block/blk-lib.c */ static void __submit_discard_cmd(struct f2fs_sb_info *sbi, struct discard_cmd *dc) @@ -790,6 +814,7 @@ static void __submit_discard_cmd(struct f2fs_sb_info *sbi, bio->bi_opf |= REQ_SYNC; submit_bio(bio); list_move_tail(&dc->list, &dcc->wait_list); + __check_sit_bitmap(sbi, dc->start, dc->start + dc->len); } } else { __remove_discard_cmd(sbi, dc);