From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
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: Bryan Schumaker <bjschuma@xxxxxxxxxx>
---
fs/nfs/internal.h | 1 +
fs/nfs/super.c | 151 +++++++++++++++++++++++++----------------------------
2 files changed, 71 insertions(+), 81 deletions(-)
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 4cf76e9..bf64095 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -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;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index c69c806..db636d7 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -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 @@ 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;
@@ -2041,6 +2009,60 @@ out_invalid_fh:
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;
--
1.7.10.1
--
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