提交 b72e4f42 编写于 作者: B Bryan Schumaker 提交者: Trond Myklebust

NFS: Create a single function for text mount data

The v2/3 and v4 cases were very similar, with just a few parameters
changed.  This makes it easy to share code.
Signed-off-by: NBryan Schumaker <bjschuma@netapp.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
上级 486aa699
......@@ -103,6 +103,7 @@ struct nfs_parsed_mount_data {
unsigned int version;
unsigned int minorversion;
char *fscache_uniq;
bool need_mount;
struct {
struct sockaddr_storage address;
......
......@@ -66,6 +66,7 @@
#include "pnfs.h"
#define NFSDBG_FACILITY NFSDBG_VFS
#define NFS_TEXT_DATA 1
#ifdef CONFIG_NFS_V3
#define NFS_DEFAULT_VERSION 3
......@@ -333,8 +334,7 @@ static const struct super_operations nfs_sops = {
};
#ifdef CONFIG_NFS_V4
static int nfs4_validate_text_mount_data(void *options,
struct nfs_parsed_mount_data *args, const char *dev_name);
static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
struct nfs_parsed_mount_data *data);
static struct dentry *nfs4_mount(struct file_system_type *fs_type,
......@@ -964,6 +964,7 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
data->auth_flavors[0] = RPC_AUTH_UNIX;
data->auth_flavor_len = 1;
data->minorversion = 0;
data->need_mount = true;
data->net = current->nsproxy->net_ns;
security_init_mnt_opts(&data->lsm_opts);
}
......@@ -1754,9 +1755,11 @@ static struct dentry *nfs_try_mount(int flags, const char *dev_name,
int status;
struct nfs_server *server;
status = nfs_request_mount(mount_info->parsed, mntfh);
if (status)
return ERR_PTR(status);
if (mount_info->parsed->need_mount) {
status = nfs_request_mount(mount_info->parsed, mntfh);
if (status)
return ERR_PTR(status);
}
/* Get a volume representation */
server = nfs_create_server(mount_info->parsed, mntfh);
......@@ -1911,6 +1914,7 @@ static int nfs_validate_mount_data(void *options,
args->acregmax = data->acregmax;
args->acdirmin = data->acdirmin;
args->acdirmax = data->acdirmax;
args->need_mount = false;
memcpy(sap, &data->addr, sizeof(data->addr));
args->nfs_server.addrlen = sizeof(data->addr);
......@@ -1962,38 +1966,8 @@ static int nfs_validate_mount_data(void *options,
}
break;
default: {
int status;
if (nfs_parse_mount_options((char *)options, args) == 0)
return -EINVAL;
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_port(sap, &args->nfs_server.port, 0);
nfs_set_mount_transport_protocol(args);
status = nfs_parse_devname(dev_name,
&args->nfs_server.hostname,
PAGE_SIZE,
&args->nfs_server.export_path,
NFS_MAXPATHLEN);
if (status)
return status;
break;
}
default:
return NFS_TEXT_DATA;
}
#ifndef CONFIG_NFS_V3
......@@ -2022,12 +1996,6 @@ static int nfs_validate_mount_data(void *options,
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;
......@@ -2041,6 +2009,60 @@ static int nfs_validate_mount_data(void *options,
return -EINVAL;
}
static int nfs_validate_text_mount_data(void *options,
struct nfs_parsed_mount_data *args,
const char *dev_name)
{
int port = 0;
int max_namelen = PAGE_SIZE;
int max_pathlen = NFS_MAXPATHLEN;
struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
if (nfs_parse_mount_options((char *)options, args) == 0)
return -EINVAL;
if (!nfs_verify_server_address(sap))
goto out_no_address;
if (args->version == 4) {
#ifdef CONFIG_NFS_V4
port = NFS_PORT;
max_namelen = NFS4_MAXNAMLEN;
max_pathlen = NFS4_MAXPATHLEN;
nfs_validate_transport_protocol(args);
nfs4_validate_mount_flags(args);
#else
goto out_v4_not_compiled;
#endif /* CONFIG_NFS_V4 */
} else
nfs_set_mount_transport_protocol(args);
nfs_set_port(sap, &args->nfs_server.port, port);
if (args->auth_flavor_len > 1)
goto out_bad_auth;
return nfs_parse_devname(dev_name,
&args->nfs_server.hostname,
max_namelen,
&args->nfs_server.export_path,
max_pathlen);
#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_no_address:
dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
return -EINVAL;
out_bad_auth:
dfprintk(MOUNT, "NFS: Too many RPC auth flavours specified\n");
return -EINVAL;
}
static int
nfs_compare_remount_data(struct nfs_server *nfss,
struct nfs_parsed_mount_data *data)
......@@ -2438,6 +2460,8 @@ static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
/* Validate the mount data */
error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
if (error == NFS_TEXT_DATA)
error = nfs_validate_text_mount_data(raw_data, data, dev_name);
if (error < 0) {
mntroot = ERR_PTR(error);
goto out;
......@@ -2572,37 +2596,6 @@ static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
}
static int nfs4_validate_text_mount_data(void *options,
struct nfs_parsed_mount_data *args,
const char *dev_name)
{
struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
nfs_set_port(sap, &args->nfs_server.port, NFS_PORT);
nfs_validate_transport_protocol(args);
nfs4_validate_mount_flags(args);
if (args->version != 4) {
dfprintk(MOUNT,
"NFS4: Illegal mount version\n");
return -EINVAL;
}
if (args->auth_flavor_len > 1) {
dfprintk(MOUNT,
"NFS4: Too many RPC auth flavours specified\n");
return -EINVAL;
}
return nfs_parse_devname(dev_name,
&args->nfs_server.hostname,
NFS4_MAXNAMLEN,
&args->nfs_server.export_path,
NFS4_MAXPATHLEN);
}
/*
* Validate NFSv4 mount options
*/
......@@ -2673,13 +2666,7 @@ static int nfs4_validate_mount_data(void *options,
break;
default:
if (nfs_parse_mount_options((char *)options, args) == 0)
return -EINVAL;
if (!nfs_verify_server_address(sap))
return -EINVAL;
return nfs4_validate_text_mount_data(options, args, dev_name);
return NFS_TEXT_DATA;
}
return 0;
......@@ -2880,6 +2867,8 @@ static struct dentry *nfs4_mount(struct file_system_type *fs_type,
/* Validate the mount data */
error = nfs4_validate_mount_data(raw_data, data, dev_name);
if (error == NFS_TEXT_DATA)
error = nfs_validate_text_mount_data(raw_data, data, dev_name);
if (error < 0) {
res = ERR_PTR(error);
goto out;
......
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