Add the fo_chown and fo_chmod methods to struct fileops and use them

to implement fchown(2) and fchmod(2) support for several file types
that previously lacked it. Add MAC entries for chown/chmod done on
posix shared memory and (old) in-kernel posix semaphores.

Based on the submission by:	glebius
Reviewed by:	rwatson
Approved by:	re (bz)

1 files changed, 36 insertions, 0 deletions

diff --git a/sys/security/mac_stub/mac_stub.c b/sys/security/mac_stub/mac_stub.c
index 007efb8..361bb15 100644
--- a/sys/security/mac_stub/mac_stub.c
+++ b/sys/security/mac_stub/mac_stub.c
@@ -687,6 +687,22 @@ stub_posixsem_check_post(struct ucred *active_cred, struct ucred *file_cred,
 }
 
 static int
+stub_posixsem_check_setmode(struct ucred *cred, struct ksem *ks,
+    struct label *kslabel, mode_t mode)
+{
+
+	return (0);
+}
+
+static int
+stub_posixsem_check_setowner(struct ucred *cred, struct ksem *ks,
+    struct label *kslabel, uid_t uid, gid_t gid)
+{
+
+	return (0);
+}
+
+static int
 stub_posixsem_check_stat(struct ucred *active_cred, struct ucred *file_cred,
     struct ksem *ks, struct label *kslabel)
 {
@@ -734,6 +750,22 @@ stub_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd,
 }
 
 static int
+stub_posixshm_check_setmode(struct ucred *cred, struct shmfd *shmfd,
+    struct label *shmlabel, mode_t mode)
+{
+
+	return (0);
+}
+
+static int
+stub_posixshm_check_setowner(struct ucred *cred, struct shmfd *shmfd,
+    struct label *shmlabel, uid_t uid, gid_t gid)
+{
+
+	return (0);
+}
+
+static int
 stub_posixshm_check_stat(struct ucred *active_cred, struct ucred *file_cred,
     struct shmfd *shmfd, struct label *shmlabel)
 {
@@ -1731,6 +1763,8 @@ static struct mac_policy_ops stub_ops =
 	.mpo_posixsem_check_getvalue = stub_posixsem_check_getvalue,
 	.mpo_posixsem_check_open = stub_posixsem_check_open,
 	.mpo_posixsem_check_post = stub_posixsem_check_post,
+	.mpo_posixsem_check_setmode = stub_posixsem_check_setmode,
+	.mpo_posixsem_check_setowner = stub_posixsem_check_setowner,
 	.mpo_posixsem_check_stat = stub_posixsem_check_stat,
 	.mpo_posixsem_check_unlink = stub_posixsem_check_unlink,
 	.mpo_posixsem_check_wait = stub_posixsem_check_wait,
@@ -1740,6 +1774,8 @@ static struct mac_policy_ops stub_ops =
 
 	.mpo_posixshm_check_mmap = stub_posixshm_check_mmap,
 	.mpo_posixshm_check_open = stub_posixshm_check_open,
+	.mpo_posixshm_check_setmode = stub_posixshm_check_setmode,
+	.mpo_posixshm_check_setowner = stub_posixshm_check_setowner,
 	.mpo_posixshm_check_stat = stub_posixshm_check_stat,
 	.mpo_posixshm_check_truncate = stub_posixshm_check_truncate,
 	.mpo_posixshm_check_unlink = stub_posixshm_check_unlink,