f2fs: introduce background_gc=sync mount option
This patch introduce background_gc=sync enabling synchronous cleaning in
background.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 16442ec..ba058d0 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -292,11 +292,16 @@
if (!name)
return -ENOMEM;
- if (strlen(name) == 2 && !strncmp(name, "on", 2))
+ if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
set_opt(sbi, BG_GC);
- else if (strlen(name) == 3 && !strncmp(name, "off", 3))
+ clear_opt(sbi, FORCE_FG_GC);
+ } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
clear_opt(sbi, BG_GC);
- else {
+ clear_opt(sbi, FORCE_FG_GC);
+ } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
+ set_opt(sbi, BG_GC);
+ set_opt(sbi, FORCE_FG_GC);
+ } else {
kfree(name);
return -EINVAL;
}
@@ -631,10 +636,14 @@
{
struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
- if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC))
- seq_printf(seq, ",background_gc=%s", "on");
- else
+ if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
+ if (test_opt(sbi, FORCE_FG_GC))
+ seq_printf(seq, ",background_gc=%s", "sync");
+ else
+ seq_printf(seq, ",background_gc=%s", "on");
+ } else {
seq_printf(seq, ",background_gc=%s", "off");
+ }
if (test_opt(sbi, DISABLE_ROLL_FORWARD))
seq_puts(seq, ",disable_roll_forward");
if (test_opt(sbi, DISCARD))