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authorChao Yu <yuchao0@huawei.com>2017-06-30 12:19:02 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2017-07-07 20:34:43 +0300
commit6915ea9d8dd8690570fe4a9864b898447a4f3da0 (patch)
tree4869631259426e1b6985d66002761d10e5bef037 /fs/f2fs
parentcce1325247b9faafc520c5789fe60feef1fd7092 (diff)
downloadlinux-6915ea9d8dd8690570fe4a9864b898447a4f3da0.tar.xz
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 <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/segment.c25
1 files changed, 25 insertions, 0 deletions
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);