Btrfs: send, add missing error check for calls to path_loop()
The function path_loop() can return a negative integer, signaling an error, 0 if there's no path loop and 1 if there's a path loop. We were treating any non zero values as meaning that a path loop exists. Fix this by explicitly checking for errors and gracefully return them to user space. Signed-off-by: Filipe Manana <fdmanana@suse.com>
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@ -3200,6 +3200,8 @@ static int apply_dir_move(struct send_ctx *sctx, struct pending_dir_move *pm)
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sctx->send_progress = sctx->cur_ino + 1;
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ret = path_loop(sctx, name, pm->ino, pm->gen, &ancestor);
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if (ret < 0)
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goto out;
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if (ret) {
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LIST_HEAD(deleted_refs);
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ASSERT(ancestor > BTRFS_FIRST_FREE_OBJECTID);
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