aboutsummaryrefslogtreecommitdiff
path: root/fs/btrfs/ctree.h
diff options
context:
space:
mode:
authorDavid Sterba <dsterba@suse.cz>2013-02-09 23:38:06 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-02-20 12:59:51 -0500
commit210549ebe9047ae5a8cc47487203d3ee16a7749b (patch)
tree57c9c8123a46a1170abba0fc476ded82eac442ed /fs/btrfs/ctree.h
parentb069e0c3450ae388d7a9c94ded6d938a465de262 (diff)
btrfs: add cancellation points to defrag
The defrag operation can take very long, we want to have a way how to cancel it. The code checks for a pending signal at safe points in the defrag loops and returns EAGAIN. This means a user can press ^C after running 'btrfs fi defrag', woks for both defrag modes, files and root. Returning from the command was instant in my light tests, but may take longer depending on the aging factor of the filesystem. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
-rw-r--r--fs/btrfs/ctree.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index f1cc247f317..14f01dc70ea 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3786,4 +3786,11 @@ static inline int is_fstree(u64 rootid)
return 1;
return 0;
}
+
+static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
+{
+ return signal_pending(current);
+}
+
+
#endif