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NFS: Create a try_mount rpc op

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I'm already looking up the nfs subversion in nfs_fs_mount(), so I have
easy access to rpc_ops that used to be difficult to reach.  This allows
me to set up a different mount path for NFS v2/3 and NFS v4.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker 2012-07-30 16:05:18 -04:00 committed by Trond Myklebust
parent e8f25e6d6d
commit ff9099f266
8 changed files with 16 additions and 12 deletions
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2
fs/nfs/internal.h
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@ -328,6 +328,8 @@ extern struct file_system_type nfs_xdev_fs_type;
extern struct file_system_type nfs4_xdev_fs_type;
extern struct file_system_type nfs4_referral_fs_type;
#endif
struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
struct nfs_subversion *);
void nfs_initialise_sb(struct super_block *);
int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);

1
fs/nfs/nfs3proc.c
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@ -925,6 +925,7 @@ const struct nfs_rpc_ops nfs_v3_clientops = {
.file_ops = &nfs_file_operations,
.getroot = nfs3_proc_get_root,
.submount = nfs_submount,
.try_mount = nfs_try_mount,
.getattr = nfs3_proc_getattr,
.setattr = nfs3_proc_setattr,
.lookup = nfs3_proc_lookup,

2
fs/nfs/nfs4_fs.h
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@ -367,7 +367,7 @@ extern const nfs4_stateid zero_stateid;
/* nfs4super.c */
struct nfs_mount_info;
extern struct nfs_subversion nfs_v4;
struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *);
struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *);
int init_nfs_v4(void);
void exit_nfs_v4(void);

1
fs/nfs/nfs4proc.c
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@ -6870,6 +6870,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = {
.file_ops = &nfs4_file_operations,
.getroot = nfs4_proc_get_root,
.submount = nfs4_submount,
.try_mount = nfs4_try_mount,
.getattr = nfs4_proc_getattr,
.setattr = nfs4_proc_setattr,
.lookup = nfs4_proc_lookup,

3
fs/nfs/nfs4super.c
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@ -226,7 +226,8 @@ static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
}
struct dentry *nfs4_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)
{
char *export_path;
struct vfsmount *root_mnt;

1
fs/nfs/proc.c
View File

@ -774,6 +774,7 @@ const struct nfs_rpc_ops nfs_v2_clientops = {
.file_ops = &nfs_file_operations,
.getroot = nfs_proc_get_root,
.submount = nfs_submount,
.try_mount = nfs_try_mount,
.getattr = nfs_proc_getattr,
.setattr = nfs_proc_setattr,
.lookup = nfs_proc_lookup,

14
fs/nfs/super.c
View File

@ -1650,9 +1650,9 @@ static int nfs_request_mount(struct nfs_parsed_mount_data *args,
return nfs_walk_authlist(args, &request);
}
static struct dentry *nfs_try_mount(int flags, const char *dev_name,
struct nfs_mount_info *mount_info,
struct nfs_subversion *nfs_mod)
struct dentry *nfs_try_mount(int flags, const char *dev_name,
struct nfs_mount_info *mount_info,
struct nfs_subversion *nfs_mod)
{
int status;
struct nfs_server *server;
@ -2403,15 +2403,9 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
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, nfs_mod);
mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod);
put_nfs_version(nfs_mod);
out:
nfs_free_parsed_mount_data(mount_info.parsed);
nfs_free_fhandle(mount_info.mntfh);

4
include/linux/nfs_xdr.h
View File

@ -1353,6 +1353,8 @@ struct nfs_renamedata {
struct nfs_access_entry;
struct nfs_client;
struct rpc_timeout;
struct nfs_subversion;
struct nfs_mount_info;
struct nfs_client_initdata;
struct nfs_pageio_descriptor;
@ -1370,6 +1372,8 @@ struct nfs_rpc_ops {
struct nfs_fsinfo *);
struct vfsmount *(*submount) (struct nfs_server *, struct dentry *,
struct nfs_fh *, struct nfs_fattr *);
struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *,
struct nfs_subversion *);
int (*getattr) (struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *);
int (*setattr) (struct dentry *, struct nfs_fattr *,