From b6f3409b2197e8fcedb43e6600e37b7cfbe0715b Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Tue, 20 Sep 2011 14:48:51 -0400 Subject: [PATCH] Btrfs: reserve sufficient space for ioctl clone Fix a crash/BUG_ON in the clone ioctl due to insufficient reservation. We need to reserve space for: - adjusting the old extent (possibly splitting it) - adding the new extent - updating the inode Signed-off-by: Sage Weil Signed-off-by: Chris Mason --- fs/btrfs/ioctl.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9947a0ac7bd5..6f89bcc4e555 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2336,7 +2336,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, else new_key.offset = destoff; - trans = btrfs_start_transaction(root, 1); + /* + * 1 - adjusting old extent (we may have to split it) + * 1 - add new extent + * 1 - inode update + */ + trans = btrfs_start_transaction(root, 3); if (IS_ERR(trans)) { ret = PTR_ERR(trans); goto out; -- 2.20.1