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Subject[RFC 9/28] Pass struct vfsmount to the inode_mknod LSM hook
Pass struct vfsmount to the inode_mknod LSM hook

Signed-off-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>

Index: linux-2.6/fs/namei.c
===================================================================
--- linux-2.6.orig/fs/namei.c
+++ linux-2.6/fs/namei.c
@@ -1851,7 +1851,7 @@ int vfs_mknod(struct inode *dir, struct
if (!dir->i_op || !dir->i_op->mknod)
return -EPERM;

- error = security_inode_mknod(dir, dentry, mode, dev);
+ error = security_inode_mknod(dir, dentry, mnt, mode, dev);
if (error)
return error;

Index: linux-2.6/include/linux/security.h
===================================================================
--- linux-2.6.orig/include/linux/security.h
+++ linux-2.6/include/linux/security.h
@@ -323,6 +323,7 @@ struct request_sock;
* and not this hook.
* @dir contains the inode structure of parent of the new file.
* @dentry contains the dentry structure of the new file.
+ * @mnt is the vfsmount corresponding to @dentry (may be NULL).
* @mode contains the mode of the new file.
* @dev contains the the device number.
* Return 0 if permission is granted.
@@ -1218,7 +1219,7 @@ struct security_operations {
struct vfsmount *mnt, int mode);
int (*inode_rmdir) (struct inode *dir, struct dentry *dentry);
int (*inode_mknod) (struct inode *dir, struct dentry *dentry,
- int mode, dev_t dev);
+ struct vfsmount *mnt, int mode, dev_t dev);
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);
@@ -1670,11 +1671,12 @@ static inline int security_inode_rmdir (

static inline int security_inode_mknod (struct inode *dir,
struct dentry *dentry,
+ struct vfsmount *mnt,
int mode, dev_t dev)
{
if (unlikely (IS_PRIVATE (dir)))
return 0;
- return security_ops->inode_mknod (dir, dentry, mode, dev);
+ return security_ops->inode_mknod (dir, dentry, mnt, mode, dev);
}

static inline int security_inode_rename (struct inode *old_dir,
@@ -2388,6 +2390,7 @@ static inline int security_inode_rmdir (

static inline int security_inode_mknod (struct inode *dir,
struct dentry *dentry,
+ struct vfsmount *mnt,
int mode, dev_t dev)
{
return 0;
Index: linux-2.6/security/dummy.c
===================================================================
--- linux-2.6.orig/security/dummy.c
+++ linux-2.6/security/dummy.c
@@ -299,7 +299,7 @@ static int dummy_inode_rmdir (struct ino
}

static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
- int mode, dev_t dev)
+ struct vfsmount *mnt, int mode, dev_t dev)
{
return 0;
}
Index: linux-2.6/security/selinux/hooks.c
===================================================================
--- linux-2.6.orig/security/selinux/hooks.c
+++ linux-2.6/security/selinux/hooks.c
@@ -2177,11 +2177,12 @@ static int selinux_inode_rmdir(struct in
return may_link(dir, dentry, MAY_RMDIR);
}

-static int selinux_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+static int selinux_inode_mknod(struct inode *dir, struct dentry *dentry,
+ struct vfsmount *mnt, int mode, dev_t dev)
{
int rc;

- rc = secondary_ops->inode_mknod(dir, dentry, mode, dev);
+ rc = secondary_ops->inode_mknod(dir, dentry, mnt, mode, dev);
if (rc)
return rc;

-
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