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authorEric Paris <eparis@redhat.com>2008-05-02 22:42:42 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-05-16 18:43:27 +0200
commit46c8ac74250a396aca855e494f49a960797a6b5e (patch)
treeaa02bcbc7f332f97c202ee14f8497dcb7b9aa992 /fs/nfs
parentNFSv4: Check the return value of decode_compound_hdr_arg() (diff)
downloadlinux-46c8ac74250a396aca855e494f49a960797a6b5e.tar.xz
linux-46c8ac74250a396aca855e494f49a960797a6b5e.zip
nfs/lsm: make NFSv4 set LSM mount options
NFSv3 get_sb operations call into the LSM layer to set security options passed from userspace. NFSv4 hooks were not originally added since it was reasonably late in the merge window and NFSv3 was the only thing that had regressed (v4 has never supported any LSM options) This patch makes NFSv4 call into the LSM to set security options rather than just blindly dropping them with no notice to the user as happens today. This patch was tested in a simple NFSv4 environment with the context= option and appeared to work as expected. Signed-off-by: Eric Paris <eparis@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Cc: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/super.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 7226a506f3ca..5ed86ac0fd9b 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2015,6 +2015,10 @@ static int nfs4_get_sb(struct file_system_type *fs_type,
goto error_splat_super;
}
+ error = security_sb_set_mnt_opts(s, &data.lsm_opts);
+ if (error)
+ goto error_splat_root;
+
s->s_flags |= MS_ACTIVE;
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
@@ -2031,6 +2035,8 @@ out_free:
nfs_free_server(server);
goto out;
+error_splat_root:
+ dput(mntroot);
error_splat_super:
up_write(&s->s_umount);
deactivate_super(s);
@@ -2114,6 +2120,8 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
+ security_sb_clone_mnt_opts(data->sb, s);
+
dprintk("<-- nfs4_xdev_get_sb() = 0\n");
return 0;
@@ -2197,6 +2205,8 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags,
mnt->mnt_sb = s;
mnt->mnt_root = mntroot;
+ security_sb_clone_mnt_opts(data->sb, s);
+
dprintk("<-- nfs4_referral_get_sb() = 0\n");
return 0;