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SUNRPC: Make RPC portmapper use per-transport storage

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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 <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2006-08-22 20:06:15 -04:00
committed by Trond Myklebust
parent ec739ef03d
commit 4a68179d38
5 changed files with 123 additions and 81 deletions
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23
include/linux/sunrpc/clnt.h
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@@ -18,18 +18,6 @@
#include <linux/sunrpc/timer.h>
#include <asm/signal.h>
/*
* This defines an RPC port mapping
*/
struct rpc_portmap {
__u32 pm_prog;
__u32 pm_vers;
__u32 pm_prot;
__u16 pm_port;
unsigned char pm_binding : 1; /* doing a getport() */
struct rpc_wait_queue pm_bindwait; /* waiting on getport() */
};
struct rpc_inode;
/*
@@ -40,7 +28,9 @@ struct rpc_clnt {
atomic_t cl_users; /* number of references */
struct rpc_xprt * cl_xprt; /* transport */
struct rpc_procinfo * cl_procinfo; /* procedure info */
u32 cl_maxproc; /* max procedure number */
u32 cl_prog, /* RPC program number */
cl_vers, /* RPC version number */
cl_maxproc; /* max procedure number */
char * cl_server; /* server machine name */
char * cl_protname; /* protocol name */
@@ -55,7 +45,6 @@ struct rpc_clnt {
cl_dead : 1;/* abandoned */
struct rpc_rtt * cl_rtt; /* RTO estimator data */
struct rpc_portmap * cl_pmap; /* port mapping */
int cl_nodelen; /* nodename length */
char cl_nodename[UNX_MAXNODENAME];
@@ -64,14 +53,8 @@ struct rpc_clnt {
struct dentry * cl_dentry; /* inode */
struct rpc_clnt * cl_parent; /* Points to parent of clones */
struct rpc_rtt cl_rtt_default;
struct rpc_portmap cl_pmap_default;
char cl_inline_name[32];
};
#define cl_timeout cl_xprt->timeout
#define cl_prog cl_pmap->pm_prog
#define cl_vers cl_pmap->pm_vers
#define cl_port cl_pmap->pm_port
#define cl_prot cl_pmap->pm_prot
/*
* General RPC program info