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[v3.1,3/7] btrfs: Do chunk level degradation check for remount

Message ID 20170309013442.19957-4-quwenruo@cn.fujitsu.com (mailing list archive)
State New, archived
Headers show

Commit Message

Qu Wenruo March 9, 2017, 1:34 a.m. UTC 
Just the same for mount time check, use btrfs_check_rw_degradable() to
check if we are OK to be remounted rw.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Tested-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>
Tested-by: Adam Borowski <kilobyte@angband.pl>
Tested-by: Dmitrii Tcvetkov <demfloro@demfloro.ru>
---
 fs/btrfs/super.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
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Patch

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index da687dc79cce..1f5772501c92 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1784,9 +1784,8 @@  static int btrfs_remount(struct super_block *sb, int *flags, char *data)
 			goto restore;
 		}
 
-		if (fs_info->fs_devices->missing_devices >
-		     fs_info->num_tolerated_disk_barrier_failures &&
-		    !(*flags & MS_RDONLY)) {
+		if (!(*flags & MS_RDONLY) &&
+		    !btrfs_check_rw_degradable(fs_info)) {
 			btrfs_warn(fs_info,
 				"too many missing devices, writeable remount is not allowed");
 			ret = -EACCES;