[PATCH 05/24] SECURITY: remove nameidata arg from inode_follow_link.

Al Viro
2015-04-20T18:13:16Z

From: NeilBrown <neilb@suse.de>

No ->inode_follow_link() methods use the nameidata arg, and
it is about to become private to namei.c.
So remove from all inode_follow_link() functions.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 2 +-
include/linux/security.h | 9 +++------
security/capability.c | 3 +--
security/security.c | 4 ++--
security/selinux/hooks.c | 2 +-
5 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 3b52954..981080c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -889,7 +889,7 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
touch_atime(link);
nd_set_link(nd, NULL);

- error = security_inode_follow_link(link->dentry, nd);
+ error = security_inode_follow_link(link->dentry);
if (error)
goto out_put_nd_path;

diff --git a/include/linux/security.h b/include/linux/security.h
index 18264ea..62a6620 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -43,7 +43,6 @@ struct file;
struct vfsmount;
struct path;
struct qstr;
-struct nameidata;
struct iattr;
struct fown_struct;
struct file_operations;
@@ -477,7 +476,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
* @inode_follow_link:
* Check permission to follow a symbolic link when looking up a pathname.
* @dentry contains the dentry structure for the link.
- * @nd contains the nameidata structure for the parent directory.
* Return 0 if permission is granted.
* @inode_permission:
* Check permission before accessing an inode. This hook is called by the
@@ -1553,7 +1551,7 @@ struct security_operations {
int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry);
int (*inode_readlink) (struct dentry *dentry);
- int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
+ int (*inode_follow_link) (struct dentry *dentry);
int (*inode_permission) (struct inode *inode, int mask);
int (*inode_setattr) (struct dentry *dentry, struct iattr *attr);
int (*inode_getattr) (const struct path *path);
@@ -1839,7 +1837,7 @@ int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags);
int security_inode_readlink(struct dentry *dentry);
-int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd);
+int security_inode_follow_link(struct dentry *dentry);
int security_inode_permission(struct inode *inode, int mask);
int security_inode_setattr(struct dentry *dentry, struct iattr *attr);
int security_inode_getattr(const struct path *path);
@@ -2241,8 +2239,7 @@ static inline int security_inode_readlink(struct dentry *dentry)
return 0;
}

-static inline int security_inode_follow_link(struct dentry *dentry,
- struct nameidata *nd)
+static inline int security_inode_follow_link(struct dentry *dentry)
{
return 0;
}
diff --git a/security/capability.c b/security/capability.c
index 0d03fcc..fae99db 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -209,8 +209,7 @@ static int cap_inode_readlink(struct dentry *dentry)
return 0;
}

-static int cap_inode_follow_link(struct dentry *dentry,
- struct nameidata *nameidata)
+static int cap_inode_follow_link(struct dentry *dentry)
{
return 0;
}
diff --git a/security/security.c b/security/security.c
index 8e9b1f4..d7c30b0 100644
--- a/security/security.c
+++ b/security/security.c
@@ -581,11 +581,11 @@ int security_inode_readlink(struct dentry *dentry)
return security_ops->inode_readlink(dentry);
}

-int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
+int security_inode_follow_link(struct dentry *dentry)
{
if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
return 0;
- return security_ops->inode_follow_link(dentry, nd);
+ return security_ops->inode_follow_link(dentry);
}

int security_inode_permission(struct inode *inode, int mask)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 7dade28..8016229 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2861,7 +2861,7 @@ static int selinux_inode_readlink(struct dentry *dentry)
return dentry_has_perm(cred, dentry, FILE__READ);
}

-static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
+static int selinux_inode_follow_link(struct dentry *dentry)
{
const struct cred *cred = current_cred();

--
2.1.4