This is a note to let you know that I've just added the patch titled
Btrfs: add missing compression property remove in btrfs_ioctl_setflags
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-add-missing-compression-property-remove-in-btrfs_ioctl_setflags.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 78a017a2c92df9b571db0a55a016280f9019c65e Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@xxxxxxxx>
Date: Thu, 11 Sep 2014 11:44:49 +0100
Subject: Btrfs: add missing compression property remove in btrfs_ioctl_setflags
From: Filipe Manana <fdmanana@xxxxxxxx>
commit 78a017a2c92df9b571db0a55a016280f9019c65e upstream.
The behaviour of a 'chattr -c' consists of getting the current flags,
clearing the FS_COMPR_FL bit and then sending the result to the set
flags ioctl - this means the bit FS_NOCOMP_FL isn't set in the flags
passed to the ioctl. This results in the compression property not being
cleared from the inode - it was cleared only if the bit FS_NOCOMP_FL
was set in the received flags.
Reproducer:
$ mkfs.btrfs -f /dev/sdd
$ mount /dev/sdd /mnt && cd /mnt
$ mkdir a
$ chattr +c a
$ touch a/file
$ lsattr a/file
--------c------- a/file
$ chattr -c a
$ touch a/file2
$ lsattr a/file2
--------c------- a/file2
$ lsattr -d a
---------------- a
Reported-by: Andreas Schneider <asn@xxxxxxxxxxxxxx>
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/ioctl.c | 3 +++
1 file changed, 3 insertions(+)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -332,6 +332,9 @@ static int btrfs_ioctl_setflags(struct f
goto out_drop;
} else {
+ ret = btrfs_set_prop(inode, "btrfs.compression", NULL, 0, 0);
+ if (ret && ret != -ENODATA)
+ goto out_drop;
ip->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
}
Patches currently in stable-queue which might be from fdmanana@xxxxxxxx are
queue-3.17/btrfs-add-missing-compression-property-remove-in-btrfs_ioctl_setflags.patch
queue-3.17/revert-btrfs-race-free-update-of-commit-root-for-ro-snapshots.patch
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