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2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/include/linux/sunrpc/rpc_pipe_fs.h
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@@ -2,8 +2,6 @@
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 #ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
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 #define _LINUX_SUNRPC_RPC_PIPE_FS_H
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-#ifdef __KERNEL__
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-
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 #include <linux/workqueue.h>
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 struct rpc_pipe_dir_head {
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@@ -94,6 +92,11 @@
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 				       char __user *, size_t);
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 extern int rpc_queue_upcall(struct rpc_pipe *, struct rpc_pipe_msg *);
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+/* returns true if the msg is in-flight, i.e., already eaten by the peer */
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+static inline bool rpc_msg_is_inflight(const struct rpc_pipe_msg *msg) {
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+	return (msg->copied != 0 && list_empty(&msg->list));
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+}
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+
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 struct rpc_clnt;
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 extern struct dentry *rpc_create_client_dir(struct dentry *, const char *, struct rpc_clnt *);
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 extern int rpc_remove_client_dir(struct rpc_clnt *);
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@@ -132,5 +135,4 @@
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 extern bool gssd_running(struct net *net);
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-#endif
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 #endif