linux-kernel - [PATCH 3/3] btrfs: set FS_SUPPORTS_SEEK

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Date:	Mon, 20 Apr 2015 15:27:52 +1000
From:	NeilBrown <neilb@...e.de>
To:	David Howells <dhowells@...hat.com>, Chris Mason <clm@...com>,
	Al Viro <viro@...IV.linux.org.uk>, Josef Bacik <jbacik@...com>,
	David Sterba <dsterba@...e.cz>
Cc:	linux-cachefs@...r.kernel.org, Dave Chinner <david@...morbit.com>,
	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: [PATCH 3/3] btrfs: set FS_SUPPORTS_SEEK_HOLE flag.

This allows fscache to cachefiles in a btrfs filesystem.

Signed-off-by: NeilBrown <neilb@...e.de>
---
 fs/btrfs/super.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 05fef198ff94..d3c5d2b40f8e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1904,7 +1904,8 @@ static struct file_system_type btrfs_fs_type = {
 	.name		= "btrfs",
 	.mount		= btrfs_mount,
 	.kill_sb	= btrfs_kill_super,
-	.fs_flags	= FS_REQUIRES_DEV | FS_BINARY_MOUNTDATA,
+	.fs_flags	= FS_REQUIRES_DEV | FS_BINARY_MOUNTDATA |
+			  FS_SUPPORTS_SEEK_HOLE,
 };
 MODULE_ALIAS_FS("btrfs");
 


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