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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-06-04 05:29:38 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-06-13 21:55:21 +0300 |
| commit | 36abef4e796d382e81a0c2d21ea5327481dd7154 (patch) | |
| tree | 64ddad32e0f684ef7a5b5d734bbc7a4684c8bafa /fs/f2fs/segment.c | |
| parent | aa987273290d206b298e9d09db83e32ead661098 (diff) | |
| download | linux-36abef4e796d382e81a0c2d21ea5327481dd7154.tar.xz | |
f2fs: introduce mode=lfs mount option
This mount option is to enable original log-structured filesystem forcefully.
So, there should be no random writes for main area.
Especially, this supports host-managed SMR device.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index eff046a792ad..4792f94089f7 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -707,6 +707,7 @@ void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc) struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); unsigned long *prefree_map = dirty_i->dirty_segmap[PRE]; unsigned int start = 0, end = -1; + unsigned int secno, start_segno; mutex_lock(&dirty_i->seglist_lock); @@ -726,8 +727,22 @@ void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc) if (!test_opt(sbi, DISCARD)) continue; - f2fs_issue_discard(sbi, START_BLOCK(sbi, start), + if (!test_opt(sbi, LFS) || sbi->segs_per_sec == 1) { + f2fs_issue_discard(sbi, START_BLOCK(sbi, start), (end - start) << sbi->log_blocks_per_seg); + continue; + } +next: + secno = GET_SECNO(sbi, start); + start_segno = secno * sbi->segs_per_sec; + if (!IS_CURSEC(sbi, secno) && + !get_valid_blocks(sbi, start, sbi->segs_per_sec)) + f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno), + sbi->segs_per_sec << sbi->log_blocks_per_seg); + + start = start_segno + sbi->segs_per_sec; + if (start < end) + goto next; } mutex_unlock(&dirty_i->seglist_lock); @@ -1221,6 +1236,9 @@ void allocate_new_segments(struct f2fs_sb_info *sbi) { int i; + if (test_opt(sbi, LFS)) + return; + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) __allocate_new_segments(sbi, i); } |