From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
With this patch NFS v2 will no longer be automatically compiled in.
Instead, users will have to select NFS_V2 during Kconfig if they want to
use it.
Signed-off-by: Bryan Schumaker <bjschuma@xxxxxxxxxx>
---
fs/nfs/Kconfig | 9 +++++++++
fs/nfs/Makefile | 5 +++--
fs/nfs/client.c | 11 ++++++++++-
3 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 2a0e6c5..4995b24 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -29,6 +29,15 @@ config NFS_FS
If unsure, say N.
+config NFS_V2
+ bool "NFS client support for NFS version 2"
+ depends on NFS_FS
+ help
+ This option enables support for version 2 of the NFS protocol
+ (RFC 1094) in the kernel's NFS client.
+
+ If unsure, say Y.
+
config NFS_V3
bool "NFS client support for NFS version 3"
depends on NFS_FS
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index b58613d..7ddd45d 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -4,11 +4,12 @@
obj-$(CONFIG_NFS_FS) += nfs.o
-nfs-y := client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \
- direct.o pagelist.o proc.o read.o symlink.o unlink.o \
+nfs-y := client.o dir.o file.o getroot.o inode.o super.o \
+ direct.o pagelist.o read.o symlink.o unlink.o \
write.o namespace.o mount_clnt.o \
dns_resolve.o cache_lib.o
nfs-$(CONFIG_ROOT_NFS) += nfsroot.o
+nfs-$(CONFIG_NFS_V2) += proc.o nfs2xdr.o
nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o
nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 08e7f24..4d793b2 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -90,7 +90,9 @@ static bool nfs4_disable_idmapping = true;
* RPC cruft for NFS
*/
static const struct rpc_version *nfs_version[5] = {
+#ifdef CONFIG_NFS_V2
[2] = &nfs_version2,
+#endif
#ifdef CONFIG_NFS_V3
[3] = &nfs_version3,
#endif
@@ -847,7 +849,7 @@ static int nfs_init_server(struct nfs_server *server,
.hostname = data->nfs_server.hostname,
.addr = (const struct sockaddr *)&data->nfs_server.address,
.addrlen = data->nfs_server.addrlen,
- .rpc_ops = &nfs_v2_clientops,
+ .rpc_ops = NULL,
.proto = data->nfs_server.protocol,
.net = data->net,
};
@@ -857,10 +859,17 @@ static int nfs_init_server(struct nfs_server *server,
dprintk("--> nfs_init_server()\n");
+
+#ifdef CONFIG_NFS_V2
+ if (data->version == 2)
+ cl_init.rpc_ops = &nfs_v2_clientops;
+#endif
#ifdef CONFIG_NFS_V3
if (data->version == 3)
cl_init.rpc_ops = &nfs_v3_clientops;
#endif
+ if (cl_init.rpc_ops == NULL)
+ return -EPROTONOSUPPORT;
nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
data->timeo, data->retrans);
--
1.7.9.4
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