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SUNRPC: Fix rpc_sockaddr2uaddr 

rpc_sockaddr2uaddr is only used by net/sunrpc/rpcb_clnt.c, where
it is used in a non-blockable context in at least one case.

Add non-blocking capability by adding a gfp_t argument

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2011-10-17 16:08:10 -07:00
parent 45402c38ee
commit d77385f238
3 changed files with 8 additions and 6 deletions
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3
include/linux/sunrpc/clnt.h
View File

@ -9,6 +9,7 @@
#ifndef _LINUX_SUNRPC_CLNT_H
#define _LINUX_SUNRPC_CLNT_H
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>
@ -161,7 +162,7 @@ const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
size_t rpc_ntop(const struct sockaddr *, char *, const size_t);
size_t rpc_pton(const char *, const size_t,
struct sockaddr *, const size_t);
char * rpc_sockaddr2uaddr(const struct sockaddr *);
char * rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
size_t rpc_uaddr2sockaddr(const char *, const size_t,
struct sockaddr *, const size_t);

5
net/sunrpc/addr.c
View File

@ -255,12 +255,13 @@ EXPORT_SYMBOL_GPL(rpc_pton);
/**
* rpc_sockaddr2uaddr - Construct a universal address string from @sap.
* @sap: socket address
* @gfp_flags: allocation mode
*
* Returns a %NUL-terminated string in dynamically allocated memory;
* otherwise NULL is returned if an error occurred. Caller must
* free the returned string.
*/
char *rpc_sockaddr2uaddr(const struct sockaddr *sap)
char *rpc_sockaddr2uaddr(const struct sockaddr *sap, gfp_t gfp_flags)
{
char portbuf[RPCBIND_MAXUADDRPLEN];
char addrbuf[RPCBIND_MAXUADDRLEN];
@ -288,7 +289,7 @@ char *rpc_sockaddr2uaddr(const struct sockaddr *sap)
if (strlcat(addrbuf, portbuf, sizeof(addrbuf)) > sizeof(addrbuf))
return NULL;
return kstrdup(addrbuf, GFP_KERNEL);
return kstrdup(addrbuf, gfp_flags);
}
EXPORT_SYMBOL_GPL(rpc_sockaddr2uaddr);

6
net/sunrpc/rpcb_clnt.c
View File

@ -410,7 +410,7 @@ static int rpcb_register_inet4(const struct sockaddr *sap,
unsigned short port = ntohs(sin->sin_port);
int result;
map->r_addr = rpc_sockaddr2uaddr(sap);
map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
"local rpcbind\n", (port ? "" : "un"),
@ -437,7 +437,7 @@ static int rpcb_register_inet6(const struct sockaddr *sap,
unsigned short port = ntohs(sin6->sin6_port);
int result;
map->r_addr = rpc_sockaddr2uaddr(sap);
map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with "
"local rpcbind\n", (port ? "" : "un"),
@ -686,7 +686,7 @@ void rpcb_getport_async(struct rpc_task *task)
case RPCBVERS_4:
case RPCBVERS_3:
map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID);
map->r_addr = rpc_sockaddr2uaddr(sap);
map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC);
map->r_owner = "";
break;
case RPCBVERS_2: