On 10/11/2013 01:40 AM, Ilya Dryomov wrote:
I have a question in my mind.
Can we reach a state that there is operation in progress when filesystem
has been readonly?If we do cancel operations on a ro filesystem, we should
get "No operations in progress" .
Thanks,
Wang
For both balance and replace, cancelling involves changing the on-disk
state and committing a transaction, which is not a good thing to do on
read-only filesystems.
Cc: Stefan Behrens <sbehrens@xxxxxxxxxxxxxxxx>
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
---
fs/btrfs/dev-replace.c | 3 +++
fs/btrfs/volumes.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 9efb94e..98df261 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -650,6 +650,9 @@ static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
u64 result;
int ret;
+ if (fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
btrfs_dev_replace_lock(dev_replace);
switch (dev_replace->replace_state) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index a306db9..2630f38 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3424,6 +3424,9 @@ int btrfs_pause_balance(struct btrfs_fs_info *fs_info)
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info)
{
+ if (fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
mutex_lock(&fs_info->balance_mutex);
if (!fs_info->balance_ctl) {
mutex_unlock(&fs_info->balance_mutex);
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
