[RFC 11/11] gfs2: Invalide security labels of inodes that go invalid

[Andreas Gruenbacher <andreas.gruenbacher@gmail.com>]

Invalide security labels of inodes when they go invalid.  SELinux will reload
the "security.selinux" xattr via iop->igetxattr on the next access.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/gfs2/glops.c |  2 ++
 fs/gfs2/inode.c | 16 ++++++++++++----
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index fa3fa5e..29be6d3 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -13,6 +13,7 @@
 #include <linux/gfs2_ondisk.h>
 #include <linux/bio.h>
 #include <linux/posix_acl.h>
+#include <linux/security.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -260,6 +261,7 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
 		if (ip) {
 			set_bit(GIF_INVALID, &ip->i_flags);
 			forget_all_cached_acls(&ip->i_inode);
+			security_inode_invalidate_secctx(&ip->i_inode);
 			gfs2_dir_hash_inval(ip);
 		}
 	}
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 063fdfc..3474976 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -2011,28 +2011,33 @@ static int gfs2_setxattr(struct dentry *dentry, const char *name,
 	return ret;
 }
 
-static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
+static ssize_t gfs2_igetxattr(struct inode *inode, const char *name,
 			     void *data, size_t size)
 {
-	struct inode *inode = d_inode(dentry);
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_holder gh;
 	int ret;
 
 	/* For selinux during lookup */
 	if (gfs2_glock_is_locked_by_me(ip->i_gl))
-		return generic_getxattr(dentry, name, data, size);
+		return generic_igetxattr(inode, name, data, size);
 
 	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
 	ret = gfs2_glock_nq(&gh);
 	if (ret == 0) {
-		ret = generic_getxattr(dentry, name, data, size);
+		ret = generic_igetxattr(inode, name, data, size);
 		gfs2_glock_dq(&gh);
 	}
 	gfs2_holder_uninit(&gh);
 	return ret;
 }
 
+static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
+			     void *data, size_t size)
+{
+	return gfs2_igetxattr(d_inode(dentry), name, data, size);
+}
+
 static int gfs2_removexattr(struct dentry *dentry, const char *name)
 {
 	struct inode *inode = d_inode(dentry);
@@ -2099,6 +2104,7 @@ const struct inode_operations gfs2_file_iops = {
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
 	.setxattr = gfs2_setxattr,
+	.igetxattr = gfs2_igetxattr,
 	.getxattr = gfs2_getxattr,
 	.listxattr = gfs2_listxattr,
 	.removexattr = gfs2_removexattr,
@@ -2121,6 +2127,7 @@ const struct inode_operations gfs2_dir_iops = {
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
 	.setxattr = gfs2_setxattr,
+	.igetxattr = gfs2_igetxattr,
 	.getxattr = gfs2_getxattr,
 	.listxattr = gfs2_listxattr,
 	.removexattr = gfs2_removexattr,
@@ -2138,6 +2145,7 @@ const struct inode_operations gfs2_symlink_iops = {
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
 	.setxattr = gfs2_setxattr,
+	.igetxattr = gfs2_igetxattr,
 	.getxattr = gfs2_getxattr,
 	.listxattr = gfs2_listxattr,
 	.removexattr = gfs2_removexattr,
-- 
2.4.3