[PATCH 44/59] LSM: Use lsm_context in security_inode_notifysecctx

[Casey Schaufler]

Convert security_inode_notifysecctx to use the lsm_context structure
instead of a context/secid pair. There is some scaffolding involved
that will be removed when the related data is updated.

Signed-off-by: Casey Schaufler <casey at schaufler-ca.com>
---
 fs/kernfs/inode.c        | 6 ++++--
 fs/nfs/inode.c           | 6 ++++--
 include/linux/security.h | 5 +++--
 security/security.c      | 8 ++------
 4 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 0c1fd945ce42..460e611b1938 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -184,6 +184,7 @@ static inline void set_inode_attr(struct inode *inode, struct iattr *iattr)
 static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)
 {
 	struct kernfs_iattrs *attrs = kn->iattr;
+	struct lsm_context lc;	/* Scaffolding -Casey */
 
 	inode->i_mode = kn->mode;
 	if (attrs) {
@@ -192,8 +193,9 @@ static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)
 		 * persistent copy in kernfs_node.
 		 */
 		set_inode_attr(inode, &attrs->ia_iattr);
-		security_inode_notifysecctx(inode, attrs->ia_secdata,
-					    attrs->ia_secdata_len);
+		lc.context = attrs->ia_secdata;
+		lc.len = attrs->ia_secdata_len;
+		security_inode_notifysecctx(inode, &lc);
 	}
 
 	if (kernfs_type(kn) == KERNFS_DIR)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 414a90d48493..8d0be9767b14 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -340,14 +340,16 @@ static void nfs_clear_label_invalid(struct inode *inode)
 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
 					struct nfs4_label *label)
 {
+	struct lsm_context lc;	/* Scaffolding -Casey */
 	int error;
 
 	if (label == NULL)
 		return;
 
 	if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
-		error = security_inode_notifysecctx(inode, label->label,
-				label->len);
+		lc.context = label->label;
+		lc.len = label->len;
+		error = security_inode_notifysecctx(inode, &lc);
 		if (error)
 			printk(KERN_ERR "%s() %s %d "
 					"security_inode_notifysecctx() %d\n",
diff --git a/include/linux/security.h b/include/linux/security.h
index ba9bcdbfaebe..2abbaf72779e 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -439,7 +439,7 @@ int security_secctx_to_secid(const char *secdata, u32 seclen,
 void security_release_secctx(char *secdata, u32 seclen);
 
 void security_inode_invalidate_secctx(struct inode *inode);
-int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen);
+int security_inode_notifysecctx(struct inode *inode, struct lsm_context *cp);
 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
 #else /* CONFIG_SECURITY */
@@ -1234,7 +1234,8 @@ static inline void security_inode_invalidate_secctx(struct inode *inode)
 {
 }
 
-static inline int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
+static inline int security_inode_notifysecctx(struct inode *inode,
+					      struct lsm_context *cp);
 {
 	return -EOPNOTSUPP;
 }
diff --git a/security/security.c b/security/security.c
index 7069ff857f58..f5e332bfcdbe 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2026,13 +2026,9 @@ void security_inode_invalidate_secctx(struct inode *inode)
 }
 EXPORT_SYMBOL(security_inode_invalidate_secctx);
 
-int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
+int security_inode_notifysecctx(struct inode *inode, struct lsm_context *cp)
 {
-	struct lsm_context lc;
-
-	lc.context = ctx;
-	lc.len = ctxlen;
-	return call_int_hook(inode_notifysecctx, 0, inode, &lc);
+	return call_int_hook(inode_notifysecctx, 0, inode, cp);
 }
 EXPORT_SYMBOL(security_inode_notifysecctx);
 
-- 
2.19.1