[PATCH v6 09/27] nfs: don't bother passing nfs_subversion to ->try_mount() and nfs_fs_mount_common()

Scott Mayhew
2019-12-10T12:32:58Z

From: Al Viro <viro@zeniv.linux.org.uk>

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/internal.h | 6 ++----
fs/nfs/nfs4_fs.h | 2 +-
fs/nfs/nfs4super.c | 5 ++---
fs/nfs/super.c | 19 ++++++++-----------
include/linux/nfs_xdr.h | 3 +--
5 files changed, 14 insertions(+), 21 deletions(-)

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 9888e9c7abe2..4a0ba66bc3aa 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -393,12 +393,10 @@ extern struct file_system_type nfs_xdev_fs_type;
extern struct file_system_type nfs4_referral_fs_type;
#endif
bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
-struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
- struct nfs_subversion *);
+struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *);
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 *);
-struct dentry *nfs_fs_mount_common(int, const char *,
- struct nfs_mount_info *, struct nfs_subversion *);
+struct dentry *nfs_fs_mount_common(int, const char *, struct nfs_mount_info *);
struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
const char *, struct nfs_mount_info *);
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index a7a73b1d1fec..5d539dce9cef 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -526,7 +526,7 @@ extern const nfs4_stateid invalid_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 nfs_subversion *);
+struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *);
extern bool nfs4_disable_idmapping;
extern unsigned short max_session_slots;
extern unsigned short max_session_cb_slots;
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 6e5417027021..2b34d8e124cd 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -98,7 +98,7 @@ static struct dentry *
nfs4_remote_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *info)
{
- return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4);
+ return nfs_fs_mount_common(flags, dev_name, info);
}

struct nfs_referral_count {
@@ -216,8 +216,7 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags,
}

struct dentry *nfs4_try_mount(int flags, const char *dev_name,
- struct nfs_mount_info *mount_info,
- struct nfs_subversion *nfs_mod)
+ struct nfs_mount_info *mount_info)
{
struct nfs_parsed_mount_data *data = mount_info->parsed;
struct dentry *res;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 6189f768aa59..cb0ead628842 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1893,15 +1893,15 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf
}

struct dentry *nfs_try_mount(int flags, const char *dev_name,
- struct nfs_mount_info *mount_info,
- struct nfs_subversion *nfs_mod)
+ struct nfs_mount_info *mount_info)
{
+ struct nfs_subversion *nfs_mod = mount_info->nfs_mod;
if (mount_info->parsed->need_mount)
mount_info->server = nfs_try_mount_request(mount_info, nfs_mod);
else
mount_info->server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);

- return nfs_fs_mount_common(flags, dev_name, mount_info, nfs_mod);
+ return nfs_fs_mount_common(flags, dev_name, mount_info);
}
EXPORT_SYMBOL_GPL(nfs_try_mount);

@@ -2648,8 +2648,7 @@ static void nfs_set_readahead(struct backing_dev_info *bdi,
}

struct dentry *nfs_fs_mount_common(int flags, const char *dev_name,
- struct nfs_mount_info *mount_info,
- struct nfs_subversion *nfs_mod)
+ struct nfs_mount_info *mount_info)
{
struct super_block *s;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
@@ -2677,7 +2676,8 @@ struct dentry *nfs_fs_mount_common(int flags, const char *dev_name,
sb_mntdata.mntflags |= SB_SYNCHRONOUS;

/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata);
+ s = sget(mount_info->nfs_mod->nfs_fs, compare_super, nfs_set_super,
+ flags, &sb_mntdata);
if (IS_ERR(s)) {
mntroot = ERR_CAST(s);
goto out_err_nosb;
@@ -2763,7 +2763,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
}
mount_info.nfs_mod = nfs_mod;

- mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod);
+ mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info);

put_nfs_version(nfs_mod);
out:
@@ -2797,10 +2797,7 @@ static struct dentry *
nfs_xdev_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data)
{
- struct nfs_mount_info *info = raw_data;
- struct nfs_subversion *nfs_mod = NFS_SB(info->cloned->sb)->nfs_client->cl_nfs_mod;
-
- return nfs_fs_mount_common(flags, dev_name, info, nfs_mod);
+ return nfs_fs_mount_common(flags, dev_name, raw_data);
}

#if IS_ENABLED(CONFIG_NFS_V4)
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 72d5695c1b47..3ee2ad642cbc 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1655,8 +1655,7 @@ 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 *);
+ struct dentry *(*try_mount) (int, const char *, struct nfs_mount_info *);
int (*getattr) (struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *, struct nfs4_label *,
struct inode *);
--
2.17.2