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