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authorChao Yu <chao2.yu@samsung.com>2015-09-18 16:55:26 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2015-10-09 16:20:53 -0700
commit9cd81ce3c2f01fc599b9156b94b868b4f578698c (patch)
treec9eda5db2740d8cc45083c7aa81754e5aeaf3715 /fs/f2fs
parent46c9e1413f3c4ecbbe775e545063e88feb1f9871 (diff)
downloadop-kernel-dev-9cd81ce3c2f01fc599b9156b94b868b4f578698c.zip
op-kernel-dev-9cd81ce3c2f01fc599b9156b94b868b4f578698c.tar.gz
f2fs: disallow switch extent_cache option dynamically
Swith extent_cache option dynamically when remount may casue consistency issue between extent cache and dnode page. Fix in this patch to avoid that condition. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/super.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index f794781..16442ec 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -742,6 +742,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
int err, active_logs;
bool need_restart_gc = false;
bool need_stop_gc = false;
+ bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
sync_filesystem(sb);
@@ -767,6 +768,14 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
goto skip;
+ /* disallow enable/disable extent_cache dynamically */
+ if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
+ err = -EINVAL;
+ f2fs_msg(sbi->sb, KERN_WARNING,
+ "switch extent_cache option is not allowed");
+ goto restore_opts;
+ }
+
/*
* We stop the GC thread if FS is mounted as RO
* or if background_gc = off is passed in mount
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