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authorBryan Schumaker <bjschuma@netapp.com>2012-07-30 16:05:16 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-07-30 19:04:17 -0400
commitab7017a3a0a64b953e091619c30413b3721d925d (patch)
tree1ec947c2794b217d7ead01ee29d8cc5aae4c51f8 /fs/nfs/super.c
parenta427b9ec4eda8cd6e641ea24541d30b641fc3140 (diff)
downloadleg-kernel-ab7017a3a0a64b953e091619c30413b3721d925d.tar.gz
NFS: Add version registering framework
This patch adds in the code to track multiple versions of the NFS protocol. I created default structures for v2, v3 and v4 so that each version can continue to work while I convert them into kernel modules. I also removed the const parameter from the rpc_version array so that I can change it at runtime. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/super.c')
-rw-r--r--fs/nfs/super.c32
1 files changed, 22 insertions, 10 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 95866a8c21bb..61405a7a6b3c 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -64,6 +64,7 @@
#include "internal.h"
#include "fscache.h"
#include "pnfs.h"
+#include "nfs.h"
#define NFSDBG_FACILITY NFSDBG_VFS
#define NFS_TEXT_DATA 1
@@ -281,7 +282,7 @@ static match_table_t nfs_vers_tokens = {
static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
-static struct file_system_type nfs_fs_type = {
+struct file_system_type nfs_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
.mount = nfs_fs_mount,
@@ -1650,7 +1651,8 @@ static int nfs_request_mount(struct nfs_parsed_mount_data *args,
}
static struct dentry *nfs_try_mount(int flags, const char *dev_name,
- struct nfs_mount_info *mount_info)
+ struct nfs_mount_info *mount_info,
+ struct nfs_subversion *nfs_mod)
{
int status;
struct nfs_server *server;
@@ -1662,11 +1664,11 @@ static struct dentry *nfs_try_mount(int flags, const char *dev_name,
}
/* Get a volume representation */
- server = nfs_create_server(mount_info->parsed, mount_info->mntfh);
+ server = nfs_create_server(mount_info->parsed, mount_info->mntfh, nfs_mod);
if (IS_ERR(server))
return ERR_CAST(server);
- return nfs_fs_mount_common(&nfs_fs_type, server, flags, dev_name, mount_info);
+ return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod);
}
/*
@@ -2297,10 +2299,10 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot,
return 0;
}
-struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
- struct nfs_server *server,
+struct dentry *nfs_fs_mount_common(struct nfs_server *server,
int flags, const char *dev_name,
- struct nfs_mount_info *mount_info)
+ struct nfs_mount_info *mount_info,
+ struct nfs_subversion *nfs_mod)
{
struct super_block *s;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
@@ -2319,7 +2321,7 @@ struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
sb_mntdata.mntflags |= MS_SYNCHRONOUS;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, compare_super, nfs_set_super, flags, &sb_mntdata);
+ s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata);
if (IS_ERR(s)) {
mntroot = ERR_CAST(s);
goto out_err_nosb;
@@ -2378,6 +2380,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
.set_security = nfs_set_sb_security,
};
struct dentry *mntroot = ERR_PTR(-ENOMEM);
+ struct nfs_subversion *nfs_mod;
int error;
mount_info.parsed = nfs_alloc_parsed_mount_data();
@@ -2394,12 +2397,20 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
goto out;
}
+ nfs_mod = get_nfs_version(mount_info.parsed->version);
+ if (IS_ERR(nfs_mod)) {
+ mntroot = ERR_CAST(nfs_mod);
+ goto out;
+ }
+
#ifdef CONFIG_NFS_V4
if (mount_info.parsed->version == 4)
mntroot = nfs4_try_mount(flags, dev_name, &mount_info);
else
#endif /* CONFIG_NFS_V4 */
- mntroot = nfs_try_mount(flags, dev_name, &mount_info);
+ mntroot = nfs_try_mount(flags, dev_name, &mount_info, nfs_mod);
+
+ put_nfs_version(nfs_mod);
out:
nfs_free_parsed_mount_data(mount_info.parsed);
@@ -2440,6 +2451,7 @@ nfs_xdev_mount_common(struct file_system_type *fs_type, int flags,
struct nfs_clone_mount *data = mount_info->cloned;
struct nfs_server *server;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
+ struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod;
int error;
dprintk("--> nfs_xdev_mount_common()\n");
@@ -2453,7 +2465,7 @@ nfs_xdev_mount_common(struct file_system_type *fs_type, int flags,
goto out_err;
}
- mntroot = nfs_fs_mount_common(fs_type, server, flags, dev_name, mount_info);
+ mntroot = nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod);
dprintk("<-- nfs_xdev_mount_common() = 0\n");
out:
return mntroot;