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author | Bryan Schumaker <bjschuma@netapp.com> | 2012-07-30 20:05:16 (GMT) |
---|---|---|
committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-07-30 23:04:17 (GMT) |
commit | ab7017a3a0a64b953e091619c30413b3721d925d (patch) | |
tree | 1ec947c2794b217d7ead01ee29d8cc5aae4c51f8 /fs/nfs/super.c | |
parent | a427b9ec4eda8cd6e641ea24541d30b641fc3140 (diff) | |
download | linux-ab7017a3a0a64b953e091619c30413b3721d925d.tar.xz |
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.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 95866a8..61405a7 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; |