From ec739ef03dc926d05051c8c5838971445504470a Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:15 -0400 Subject: SUNRPC: Create a helper to tell whether a transport is bound Hide the contents and format of xprt->addr by eliminating direct uses of the xprt->addr.sin_port field. This change is required to support alternate RPC host address formats (eg IPv6). Test-plan: Destructive testing (unplugging the network temporarily). Repeated runs of Connectathon locking suite with UDP and TCP. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 3a0cca255b76..a71106723d71 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -269,6 +269,7 @@ int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to); #define XPRT_CONNECTED (1) #define XPRT_CONNECTING (2) #define XPRT_CLOSE_WAIT (3) +#define XPRT_BOUND (4) static inline void xprt_set_connected(struct rpc_xprt *xprt) { @@ -312,6 +313,21 @@ static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt) return test_and_set_bit(XPRT_CONNECTING, &xprt->state); } +static inline void xprt_set_bound(struct rpc_xprt *xprt) +{ + test_and_set_bit(XPRT_BOUND, &xprt->state); +} + +static inline int xprt_bound(struct rpc_xprt *xprt) +{ + return test_bit(XPRT_BOUND, &xprt->state); +} + +static inline void xprt_clear_bound(struct rpc_xprt *xprt) +{ + clear_bit(XPRT_BOUND, &xprt->state); +} + #endif /* __KERNEL__*/ #endif /* _LINUX_SUNRPC_XPRT_H */ -- cgit v1.2.3 From 4a68179d38874c37be2802442a71b847f5d1a2a9 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:15 -0400 Subject: SUNRPC: Make RPC portmapper use per-transport storage Move connection and bind state that was maintained in the rpc_clnt structure to the rpc_xprt structure. This will allow the creation of a clean API for plugging in different types of bind mechanisms. This brings improvements such as the elimination of a single spin lock to control serialization for all in-kernel RPC binding. A set of per-xprt bitops is used to serialize tasks during RPC binding, just like it now works for making RPC transport connections. Test-plan: Destructive testing (unplugging the network temporarily). Connectathon with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked. Probably need to rig a server where certain services aren't running, or that returns an error for some typical operation. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index a71106723d71..4ce82616873d 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -138,6 +138,7 @@ struct rpc_xprt { unsigned int tsh_size; /* size of transport specific header */ + struct rpc_wait_queue binding; /* requests waiting on rpcbind */ struct rpc_wait_queue sending; /* requests waiting to send */ struct rpc_wait_queue resend; /* requests waiting to resend */ struct rpc_wait_queue pending; /* requests in flight */ @@ -270,6 +271,7 @@ int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to); #define XPRT_CONNECTING (2) #define XPRT_CLOSE_WAIT (3) #define XPRT_BOUND (4) +#define XPRT_BINDING (5) static inline void xprt_set_connected(struct rpc_xprt *xprt) { @@ -328,6 +330,18 @@ static inline void xprt_clear_bound(struct rpc_xprt *xprt) clear_bit(XPRT_BOUND, &xprt->state); } +static inline void xprt_clear_binding(struct rpc_xprt *xprt) +{ + smp_mb__before_clear_bit(); + clear_bit(XPRT_BINDING, &xprt->state); + smp_mb__after_clear_bit(); +} + +static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt) +{ + return test_and_set_bit(XPRT_BINDING, &xprt->state); +} + #endif /* __KERNEL__*/ #endif /* _LINUX_SUNRPC_XPRT_H */ -- cgit v1.2.3 From bbf7c1dd2ae2b4040b41b1065ee9b1b6905b1605 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:16 -0400 Subject: SUNRPC: Introduce transport switch callout for pluggable rpcbind Introduce a clean transport switch API for plugging in different types of rpcbind mechanisms. For instance, rpcbind can cleanly replace the existing portmapper client, or a transport can choose to implement RPC binding any way it likes. Test plan: Destructive testing (unplugging the network temporarily). Connectathon with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked. Probably need to rig a server where certain services aren't running, or that returns an error for some typical operation. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 4ce82616873d..84122559fa17 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -105,6 +105,7 @@ struct rpc_xprt_ops { void (*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize); int (*reserve_xprt)(struct rpc_task *task); void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task); + void (*rpcbind)(struct rpc_task *task); void (*set_port)(struct rpc_xprt *xprt, unsigned short port); void (*connect)(struct rpc_task *task); void * (*buf_alloc)(struct rpc_task *task, size_t size); -- cgit v1.2.3 From edb267a688fcee5335d596752f117a30c7152e44 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:18 -0400 Subject: SUNRPC: add xprt switch API for printing formatted remote peer addresses Add a new method to the transport switch API to provide a way to convert the opaque contents of xprt->addr to a human-readable string. Test plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 84122559fa17..8372ab8fc9b5 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -51,6 +51,14 @@ struct rpc_timeout { unsigned char to_exponential; }; +enum rpc_display_format_t { + RPC_DISPLAY_ADDR = 0, + RPC_DISPLAY_PORT, + RPC_DISPLAY_PROTO, + RPC_DISPLAY_ALL, + RPC_DISPLAY_MAX, +}; + struct rpc_task; struct rpc_xprt; struct seq_file; @@ -103,6 +111,7 @@ struct rpc_rqst { struct rpc_xprt_ops { void (*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize); + char * (*print_addr)(struct rpc_xprt *xprt, enum rpc_display_format_t format); int (*reserve_xprt)(struct rpc_task *task); void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task); void (*rpcbind)(struct rpc_task *task); @@ -207,6 +216,8 @@ struct rpc_xprt { void (*old_data_ready)(struct sock *, int); void (*old_state_change)(struct sock *); void (*old_write_space)(struct sock *); + + char * address_strings[RPC_DISPLAY_MAX]; }; #define XPRT_LAST_FRAG (1 << 0) -- cgit v1.2.3 From c4efcb1d3e0bc76aeb9ca6301d19a5079893c6c9 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:19 -0400 Subject: SUNRPC: Use "sockaddr_storage" for storing RPC client's remote peer address IPv6 addresses are big (128 bytes). Now that no RPC client consumers treat the addr field in rpc_xprt structs as an opaque, and access it only via the API calls, we can safely widen the field in the rpc_xprt struct to accomodate larger addresses. Test plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 8372ab8fc9b5..fc05cfbd5805 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -134,7 +134,8 @@ struct rpc_xprt { struct sock * inet; /* INET layer */ struct rpc_timeout timeout; /* timeout parms */ - struct sockaddr_in addr; /* server address */ + struct sockaddr_storage addr; /* server address */ + size_t addrlen; /* size of server address */ int prot; /* IP protocol */ unsigned long cong; /* current congestion */ -- cgit v1.2.3 From c2866763b4029411d166040306691773c12d4caf Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:20 -0400 Subject: SUNRPC: use sockaddr + size when creating remote transport endpoints Prepare for more generic transport endpoint handling needed by transports that might use different forms of addressing, such as IPv6. Introduce a single function call to replace the two-call xprt_create_proto/rpc_create_client API. Define a new rpc_create_args structure that allows callers to pass in remote endpoint addresses of varying length. Test-plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index fc05cfbd5805..bc80fcfdd892 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -237,6 +237,7 @@ void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long /* * Generic internal transport functions */ +struct rpc_xprt * xprt_create_transport(int proto, struct sockaddr *addr, size_t size, struct rpc_timeout *toparms); void xprt_connect(struct rpc_task *task); void xprt_reserve(struct rpc_task *task); int xprt_reserve_xprt(struct rpc_task *task); -- cgit v1.2.3 From ff9aa5e56df60cc8565a93cc868fe25ae3f20e49 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 22 Aug 2006 20:06:21 -0400 Subject: SUNRPC: Eliminate xprt_create_proto and rpc_create_client The two function call API for creating a new RPC client is now obsolete. Remove it. Also, remove an unnecessary check to see whether the caller is capable of using privileged network services. The kernel RPC client always uses a privileged ephemeral port by default; callers are responsible for checking the authority of users to make use of any RPC service, or for specifying that a nonprivileged port is acceptable. Test plan: Repeated runs of Connectathon locking suite. Check network trace to ensure correctness of NLM requests and replies. Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index bc80fcfdd892..de4efea7c856 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -231,7 +231,6 @@ struct rpc_xprt { /* * Transport operations used by ULPs */ -struct rpc_xprt * xprt_create_proto(int proto, struct sockaddr_in *addr, struct rpc_timeout *to); void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long incr); /* -- cgit v1.2.3 From 6b6ca86b77b62b798cf9ca2599036420abce7796 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 5 Sep 2006 12:55:57 -0400 Subject: SUNRPC: Add refcounting to the struct rpc_xprt In a subsequent patch, this will allow the portmapper to take a reference to the rpc_xprt for which it is updating the port number, fixing an Oops. Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprt.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/linux/sunrpc/xprt.h') diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index de4efea7c856..bdeba8538c71 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -129,6 +130,7 @@ struct rpc_xprt_ops { }; struct rpc_xprt { + struct kref kref; /* Reference count */ struct rpc_xprt_ops * ops; /* transport methods */ struct socket * sock; /* BSD socket layer */ struct sock * inet; /* INET layer */ @@ -248,7 +250,8 @@ int xprt_adjust_timeout(struct rpc_rqst *req); void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task); void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task); void xprt_release(struct rpc_task *task); -int xprt_destroy(struct rpc_xprt *xprt); +struct rpc_xprt * xprt_get(struct rpc_xprt *xprt); +void xprt_put(struct rpc_xprt *xprt); static inline u32 *xprt_skip_transport_header(struct rpc_xprt *xprt, u32 *p) { -- cgit v1.2.3