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authorChuck Lever <chuck.lever@oracle.com>2008-03-14 14:10:22 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-03-19 18:00:19 -0400
commitf22d6d79fe227245363a8849ea8c85fe6c6598c3 (patch)
tree5496ddd3e912a399e0be9a7116fc1a66d6c79a10 /fs/nfs/super.c
parent78fa701f341564e60461de91cd08ff5f7fb09b31 (diff)
NFS: Save the value of the "port=" mount option
During a remount based on the mount options displayed in /proc/mounts, we want to preserve the original behavior of the mount request. Let's save the original setting of the "port=" mount option in the mount's nfs_server structure. This allows us to simplify the default behavior of port setting for NFSv4 mounts: by default, NFSv2/3 mounts first try an RPC bind to determine the NFS server's port, unless the user specified the "port=" mount option; Users can force the client to skip the RPC bind by explicitly specifying "port=<value>". NFSv4, by contrast, assumes the NFS server port is 2049 and skips the RPC bind, unless the user specifies "port=". Users can force an RPC bind for NFSv4 by explicitly specifying "port=0". I added a couple of extra comments to clarify this behavior. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/super.c')
-rw-r--r--fs/nfs/super.c37
1 files changed, 6 insertions, 31 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 53a67c6d4d2a..3c6f53aa7317 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -685,7 +685,6 @@ static int nfs_parse_mount_options(char *raw,
struct nfs_parsed_mount_data *mnt)
{
char *p, *string, *secdata;
- unsigned short port = 0;
int rc;
if (!raw) {
@@ -800,7 +799,7 @@ static int nfs_parse_mount_options(char *raw,
return 0;
if (option < 0 || option > 65535)
return 0;
- port = option;
+ mnt->nfs_server.port = option;
break;
case Opt_rsize:
if (match_int(args, &mnt->rsize))
@@ -1050,7 +1049,8 @@ static int nfs_parse_mount_options(char *raw,
}
}
- nfs_set_port((struct sockaddr *)&mnt->nfs_server.address, port);
+ nfs_set_port((struct sockaddr *)&mnt->nfs_server.address,
+ mnt->nfs_server.port);
return 1;
@@ -1171,7 +1171,9 @@ static int nfs_validate_mount_data(void *options,
args->acregmax = 60;
args->acdirmin = 30;
args->acdirmax = 60;
+ args->mount_server.port = 0; /* autobind unless user sets port */
args->mount_server.protocol = XPRT_TRANSPORT_UDP;
+ args->nfs_server.port = 0; /* autobind unless user sets port */
args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
switch (data->version) {
@@ -1708,28 +1710,6 @@ static void nfs4_fill_super(struct super_block *sb)
}
/*
- * If the user didn't specify a port, set the port number to
- * the NFS version 4 default port.
- */
-static void nfs4_default_port(struct sockaddr *sap)
-{
- switch (sap->sa_family) {
- case AF_INET: {
- struct sockaddr_in *ap = (struct sockaddr_in *)sap;
- if (ap->sin_port == 0)
- ap->sin_port = htons(NFS_PORT);
- break;
- }
- case AF_INET6: {
- struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap;
- if (ap->sin6_port == 0)
- ap->sin6_port = htons(NFS_PORT);
- break;
- }
- }
-}
-
-/*
* Validate NFSv4 mount options
*/
static int nfs4_validate_mount_data(void *options,
@@ -1753,6 +1733,7 @@ static int nfs4_validate_mount_data(void *options,
args->acregmax = 60;
args->acdirmin = 30;
args->acdirmax = 60;
+ args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */
args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
switch (data->version) {
@@ -1769,9 +1750,6 @@ static int nfs4_validate_mount_data(void *options,
&args->nfs_server.address))
goto out_no_address;
- nfs4_default_port((struct sockaddr *)
- &args->nfs_server.address);
-
switch (data->auth_flavourlen) {
case 0:
args->auth_flavors[0] = RPC_AUTH_UNIX;
@@ -1829,9 +1807,6 @@ static int nfs4_validate_mount_data(void *options,
&args->nfs_server.address))
return -EINVAL;
- nfs4_default_port((struct sockaddr *)
- &args->nfs_server.address);
-
switch (args->auth_flavor_len) {
case 0:
args->auth_flavors[0] = RPC_AUTH_UNIX;