[PATCH 52/58] LSM: Use lsm_context in security_inode_setsecctx

[Casey Schaufler]

From: Casey Schaufler <cschaufler at schaufler-ca.com>

Convert security_inode_setsecctx 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/nfsd/nfs4proc.c       | 8 ++++++--
 fs/nfsd/vfs.c            | 7 ++++++-
 include/linux/security.h | 5 +++--
 security/security.c      | 8 ++------
 4 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 0cfd257ffdaf..5b4ea2a317ed 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -54,12 +54,16 @@
 static inline void
 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
 {
+	struct lsm_context lc;
 	struct inode *inode = d_inode(resfh->fh_dentry);
 	int status;
 
 	inode_lock(inode);
-	status = security_inode_setsecctx(resfh->fh_dentry,
-		label->data, label->len);
+
+	lsm_context_init(&lc);
+	lc.context = label->data;
+	lc.len = label->len;
+	status = security_inode_setsecctx(resfh->fh_dentry, &lc);
 	inode_unlock(inode);
 
 	if (status)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7dc98e14655d..2d6dd4bb7247 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -531,6 +531,7 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	__be32 error;
 	int host_error;
 	struct dentry *dentry;
+	struct lsm_context lc;
 
 	error = fh_verify(rqstp, fhp, 0 /* S_IFREG */, NFSD_MAY_SATTR);
 	if (error)
@@ -539,7 +540,11 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	dentry = fhp->fh_dentry;
 
 	inode_lock(d_inode(dentry));
-	host_error = security_inode_setsecctx(dentry, label->data, label->len);
+
+	lsm_context_init(&lc);
+	lc.context = label->data;
+	lc.len = label->len;
+	host_error = security_inode_setsecctx(dentry, &lc);
 	inode_unlock(d_inode(dentry));
 	return nfserrno(host_error);
 }
diff --git a/include/linux/security.h b/include/linux/security.h
index 94c714310ab7..0be6eadd0110 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -439,7 +439,7 @@ void security_release_secctx(struct lsm_context *cp);
 
 void security_inode_invalidate_secctx(struct inode *inode);
 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_setsecctx(struct dentry *dentry, struct lsm_context *cp);
 int security_inode_getsecctx(struct inode *inode, struct lsm_context *cp);
 #else /* CONFIG_SECURITY */
 
@@ -1237,7 +1237,8 @@ static inline int security_inode_notifysecctx(struct inode *inode,
 {
 	return -EOPNOTSUPP;
 }
-static inline int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
+static inline int security_inode_setsecctx(struct dentry *dentry,
+					   struct lsm_context *cp)
 {
 	return -EOPNOTSUPP;
 }
diff --git a/security/security.c b/security/security.c
index 9d09c774a1e9..363647cf1ae8 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2006,13 +2006,9 @@ int security_inode_notifysecctx(struct inode *inode, struct lsm_context *cp)
 }
 EXPORT_SYMBOL(security_inode_notifysecctx);
 
-int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
+int security_inode_setsecctx(struct dentry *dentry, struct lsm_context *cp)
 {
-	struct lsm_context lc;
-
-	lc.context = ctx;
-	lc.len = ctxlen;
-	return call_int_hook(inode_setsecctx, 0, dentry, &lc);
+	return call_int_hook(inode_setsecctx, 0, dentry, cp);
 }
 EXPORT_SYMBOL(security_inode_setsecctx);
 
-- 
2.19.1