From 5cc2b17e80cf5770f2e585c2d90fd8af1b901258 Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Mon, 2 Mar 2015 20:53:52 +0000 Subject: [PATCH] Btrfs: send, add missing check for dead clone root After we locked the root's root item, a concurrent snapshot deletion call might have set the dead flag on it. So check if the dead flag is set and abort if it is, just like we do for the parent root. Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: Chris Mason --- fs/btrfs/send.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index d6033f540cc7..6ec28f13659e 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -5855,7 +5855,8 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_) clone_sources_to_rollback = i + 1; spin_lock(&clone_root->root_item_lock); clone_root->send_in_progress++; - if (!btrfs_root_readonly(clone_root)) { + if (!btrfs_root_readonly(clone_root) || + btrfs_root_dead(clone_root)) { spin_unlock(&clone_root->root_item_lock); srcu_read_unlock(&fs_info->subvol_srcu, index); ret = -EPERM;