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Subject[RFC 1/28] Pass struct vfsmount to the inode_create LSM hook.
Pass struct vfsmount to the inode_create 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
@@ -1503,7 +1503,7 @@ int vfs_create(struct inode *dir, struct
return -EACCES; /* shouldn't it be ENOSYS? */
mode &= S_IALLUGO;
mode |= S_IFREG;
- error = security_inode_create(dir, dentry, mode);
+ error = security_inode_create(dir, dentry, nd ? nd->mnt : NULL, mode);
if (error)
return error;
DQUOT_INIT(dir);
Index: linux-2.6/include/linux/security.h
===================================================================
--- linux-2.6.orig/include/linux/security.h
+++ linux-2.6/include/linux/security.h
@@ -283,6 +283,7 @@ struct request_sock;
* Check permission to create a regular file.
* @dir contains inode structure of the parent of the new file.
* @dentry contains the dentry structure for the file to be created.
+ * @mnt is the vfsmount corresponding to @dentry (may be NULL).
* @mode contains the file mode of the file to be created.
* Return 0 if permission is granted.
* @inode_link:
@@ -1204,8 +1205,8 @@ struct security_operations {
void (*inode_free_security) (struct inode *inode);
int (*inode_init_security) (struct inode *inode, struct inode *dir,
char **name, void **value, size_t *len);
- int (*inode_create) (struct inode *dir,
- struct dentry *dentry, int mode);
+ int (*inode_create) (struct inode *dir, struct dentry *dentry,
+ struct vfsmount *mnt, int mode);
int (*inode_link) (struct dentry *old_dentry,
struct inode *dir, struct dentry *new_dentry);
int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
@@ -1611,11 +1612,12 @@ static inline int security_inode_init_se

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

static inline int security_inode_link (struct dentry *old_dentry,
@@ -2338,6 +2340,7 @@ static inline int security_inode_init_se

static inline int security_inode_create (struct inode *dir,
struct dentry *dentry,
+ struct vfsmount *mnt,
int mode)
{
return 0;
Index: linux-2.6/security/dummy.c
===================================================================
--- linux-2.6.orig/security/dummy.c
+++ linux-2.6/security/dummy.c
@@ -265,7 +265,7 @@ static int dummy_inode_init_security (st
}

static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
- int mask)
+ struct vfsmount *mnt, int mask)
{
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
@@ -2135,7 +2135,8 @@ static int selinux_inode_init_security(s
return 0;
}

-static int selinux_inode_create(struct inode *dir, struct dentry *dentry, int mask)
+static int selinux_inode_create(struct inode *dir, struct dentry *dentry,
+ struct vfsmount *mnt, int mask)
{
return may_create(dir, dentry, SECCLASS_FILE);
}
-
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