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btrfs: fix error handling when run_delayed_extent_op fails
In __btrfs_run_delayed_refs, the error path when run_delayed_extent_op
fails sets locked_ref->processing = 0 but doesn't re-increment
delayed_refs->num_heads_ready. As a result, we end up triggering
the WARN_ON in btrfs_select_ref_head.
Fixes: d7df2c796d
(Btrfs: attach delayed ref updates to delayed ref heads)
Reported-by: Jon Nelson <jnelson-suse@jamponi.net>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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@ -2572,7 +2572,10 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
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*/
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if (must_insert_reserved)
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locked_ref->must_insert_reserved = 1;
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spin_lock(&delayed_refs->lock);
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locked_ref->processing = 0;
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delayed_refs->num_heads_ready++;
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spin_unlock(&delayed_refs->lock);
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btrfs_debug(fs_info,
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"run_delayed_extent_op returned %d",
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ret);
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