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NFS: Allow the "nfs" file system type to support NFSv4

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When mounting an "nfs" type file system, recognize "v4," "vers=4," or
"nfsvers=4" mount options, and convert the file system to "nfs4" under
the covers.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
[trondmy: fixed up binary mount code so it sets the 'version' field too]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2009-09-08 19:50:03 -04:00 committed by Trond Myklebust
parent a6fe23be90
commit 764302ccb8
3 changed files with 48 additions and 2 deletions
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1
fs/nfs/internal.h
View File

@ -68,6 +68,7 @@ struct nfs_parsed_mount_data {
unsigned int auth_flavor_len;
rpc_authflavor_t auth_flavors[1];
char *client_address;
unsigned int version;
unsigned int minorversion;
char *fscache_uniq;

48
fs/nfs/super.c
View File

@ -73,7 +73,7 @@ enum {
Opt_cto, Opt_nocto,
Opt_ac, Opt_noac,
Opt_lock, Opt_nolock,
Opt_v2, Opt_v3,
Opt_v2, Opt_v3, Opt_v4,
Opt_udp, Opt_tcp, Opt_rdma,
Opt_acl, Opt_noacl,
Opt_rdirplus, Opt_nordirplus,
@ -127,6 +127,7 @@ static const match_table_t nfs_mount_option_tokens = {
{ Opt_nolock, "nolock" },
{ Opt_v2, "v2" },
{ Opt_v3, "v3" },
{ Opt_v4, "v4" },
{ Opt_udp, "udp" },
{ Opt_tcp, "tcp" },
{ Opt_rdma, "rdma" },
@ -934,10 +935,18 @@ static int nfs_parse_mount_options(char *raw,
break;
case Opt_v2:
mnt->flags &= ~NFS_MOUNT_VER3;
mnt->version = 2;
break;
case Opt_v3:
mnt->flags |= NFS_MOUNT_VER3;
mnt->version = 3;
break;
#ifdef CONFIG_NFS_V4
case Opt_v4:
mnt->flags &= ~NFS_MOUNT_VER3;
mnt->version = 4;
break;
#endif
case Opt_udp:
mnt->flags &= ~NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
@ -1151,10 +1160,18 @@ static int nfs_parse_mount_options(char *raw,
switch (option) {
case NFS2_VERSION:
mnt->flags &= ~NFS_MOUNT_VER3;
mnt->version = 2;
break;
case NFS3_VERSION:
mnt->flags |= NFS_MOUNT_VER3;
mnt->version = 3;
break;
#ifdef CONFIG_NFS_V4
case NFS4_VERSION:
mnt->flags &= ~NFS_MOUNT_VER3;
mnt->version = 4;
break;
#endif
default:
goto out_invalid_value;
}
@ -1629,6 +1646,7 @@ static int nfs_validate_mount_data(void *options,
args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
args->auth_flavors[0] = RPC_AUTH_UNIX;
args->auth_flavor_len = 1;
args->minorversion = 0;
switch (data->version) {
case 1:
@ -1650,8 +1668,11 @@ static int nfs_validate_mount_data(void *options,
if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
goto out_invalid_fh;
mntfh->size = data->root.size;
} else
args->version = 3;
} else {
mntfh->size = NFS2_FHSIZE;
args->version = 2;
}
memcpy(mntfh->data, data->root.data, mntfh->size);
@ -1726,6 +1747,14 @@ static int nfs_validate_mount_data(void *options,
if (!nfs_verify_server_address(sap))
goto out_no_address;
if (args->version == 4)
#ifdef CONFIG_NFS_V4
return nfs4_validate_text_mount_data(options,
args, dev_name);
#else
goto out_v4_not_compiled;
#endif
nfs_set_default_port(sap, args->nfs_server.port, 0);
nfs_set_mount_transport_protocol(args);
@ -1774,6 +1803,12 @@ out_v3_not_compiled:
return -EPROTONOSUPPORT;
#endif /* !CONFIG_NFS_V3 */
#ifndef CONFIG_NFS_V4
out_v4_not_compiled:
dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
return -EPROTONOSUPPORT;
#endif /* !CONFIG_NFS_V4 */
out_nomem:
dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n");
return -ENOMEM;
@ -2069,6 +2104,14 @@ static int nfs_get_sb(struct file_system_type *fs_type,
if (error < 0)
goto out;
#ifdef CONFIG_NFS_V4
if (data->version == 4) {
error = nfs4_try_mount(flags, dev_name, data, mnt);
kfree(data->client_address);
goto out;
}
#endif /* CONFIG_NFS_V4 */
/* Get a volume representation */
server = nfs_create_server(data, mntfh);
if (IS_ERR(server)) {
@ -2320,6 +2363,7 @@ static int nfs4_validate_mount_data(void *options,
args->nfs_server.port = NFS_UNSPEC_PORT;
args->auth_flavors[0] = RPC_AUTH_UNIX;
args->auth_flavor_len = 1;
args->version = 4;
args->minorversion = 0;
switch (data->version) {

1
include/linux/nfs4.h
View File

@ -472,6 +472,7 @@ enum lock_type4 {
#define NFSPROC4_NULL 0
#define NFSPROC4_COMPOUND 1
#define NFS4_VERSION 4
#define NFS4_MINOR_VERSION 0
#if defined(CONFIG_NFS_V4_1)