At 09/15/2016 12:24 PM, Dave Chinner wrote:
On Wed, Sep 14, 2016 at 09:55:22AM +0800, Qu Wenruo wrote:
Introduce _post_mount_hook(), which will be executed after mounting
scratch/test.
It's quite useful for fs(OK, only btrfs yet, again) which needs to
use ioctl other than mount option to enable some of its feature.
Just implement a _btrfs_mount() function (similar to
_overlay_mount()) to do btrfs specific things at mount time.
Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
---
common/rc | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/common/rc b/common/rc
index 23c007a..631397f 100644
--- a/common/rc
+++ b/common/rc
@@ -321,6 +321,27 @@ _overlay_scratch_unmount()
$UMOUNT_PROG $SCRATCH_MNT
}
+_run_btrfs_post_mount_hook()
+{
+ mnt_point=$1
+ for n in $ALWAYS_ENABLE_BTRFS_FEATURE; do
What's this magic, undefined, undocumented variable?
Yes this reminds me.
The biggest problem is, where is the document of all these variables?
common/config and config/examples all lacks variables like
TIME_FACTOR/LOAD_FACTOR.
Or it's the time to doc them all?
Thanks,
Qu
Cheers,
Dave.
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