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SUNRPC: Allow rpc_create() to request that TCP slots be unlimited

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This is mainly for use by NFSv4.1, where the session negotiation
ultimately wants to decide how many RPC slots we can fill.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-04-14 11:42:00 -04:00
parent ba60eb25ff
commit b7993cebb8
4 changed files with 11 additions and 1 deletions
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1
include/linux/sunrpc/clnt.h
View file

@ -124,6 +124,7 @@ struct rpc_create_args {
#define RPC_CLNT_CREATE_NOPING (1UL << 4)
#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
#define RPC_CLNT_CREATE_QUIET (1UL << 6)
#define RPC_CLNT_CREATE_INFINITE_SLOTS (1UL << 7)
struct rpc_clnt *rpc_create(struct rpc_create_args *args);
struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,

3
include/linux/sunrpc/xprt.h
View file

@ -255,6 +255,8 @@ static inline int bc_prealloc(struct rpc_rqst *req)
}
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
#define XPRT_CREATE_INFINITE_SLOTS (1U)
struct xprt_create {
int ident; /* XPRT_TRANSPORT identifier */
struct net * net;
@ -263,6 +265,7 @@ struct xprt_create {
size_t addrlen;
const char *servername;
struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
unsigned int flags;
};
struct xprt_class {

2
net/sunrpc/clnt.c
View file

@ -414,6 +414,8 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
};
char servername[48];
if (args->flags & RPC_CLNT_CREATE_INFINITE_SLOTS)
xprtargs.flags |= XPRT_CREATE_INFINITE_SLOTS;
/*
* If the caller chooses not to specify a hostname, whip
* up a string representation of the passed-in address.

6
net/sunrpc/xprtsock.c
View file

@ -2762,9 +2762,13 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
struct rpc_xprt *xprt;
struct sock_xprt *transport;
struct rpc_xprt *ret;
unsigned int max_slot_table_size = xprt_max_tcp_slot_table_entries;
if (args->flags & XPRT_CREATE_INFINITE_SLOTS)
max_slot_table_size = RPC_MAX_SLOT_TABLE_LIMIT;
xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
xprt_max_tcp_slot_table_entries);
max_slot_table_size);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);