xnu-6153.141.1.tar.gz

[apple/xnu.git] / bsd / vfs / vfs_subr.c

diff --git a/bsd/vfs/vfs_subr.c b/bsd/vfs/vfs_subr.c
index 0d44e828be508ec33dcb3fa9aaf35afe6d1abaf0..08459f52960339c5d9ace5f6d32a9718a79d3f8f 100644 (file)
--- a/bsd/vfs/vfs_subr.c
+++ b/bsd/vfs/vfs_subr.c
@@ -2890,7 +2890,7 @@ vn_getpath_fsenter(struct vnode *vp, char *pathbuf, int *len)
 int
 vn_getpath_fsenter_with_parent(struct vnode *dvp, struct vnode *vp, char *pathbuf, int *len)
 {
-       return build_path_with_parent(vp, dvp, pathbuf, *len, len, 0, vfs_context_current());
+       return build_path_with_parent(vp, dvp, pathbuf, *len, len, NULL, 0, vfs_context_current());
 }
 
 int
@@ -2910,7 +2910,7 @@ vn_getpath_ext(struct vnode *vp, struct vnode *dvp, char *pathbuf, int *len, int
                }
        }
 
-       return build_path_with_parent(vp, dvp, pathbuf, *len, len, bpflags, vfs_context_current());
+       return build_path_with_parent(vp, dvp, pathbuf, *len, len, NULL, bpflags, vfs_context_current());
 }
 
 int
@@ -2919,6 +2919,40 @@ vn_getpath_no_firmlink(struct vnode *vp, char *pathbuf, int *len)
        return vn_getpath_ext(vp, NULLVP, pathbuf, len, VN_GETPATH_NO_FIRMLINK);
 }
 
+int
+vn_getpath_ext_with_mntlen(struct vnode *vp, struct vnode *dvp, char *pathbuf, size_t *len, size_t *mntlen, int flags)
+{
+       int bpflags = (flags & VN_GETPATH_FSENTER) ? 0 : BUILDPATH_NO_FS_ENTER;
+       int local_len;
+       int error;
+
+       if (*len > INT_MAX) {
+               return EINVAL;
+       }
+
+       local_len = *len;
+
+       if (flags && (flags != VN_GETPATH_FSENTER)) {
+               if (flags & VN_GETPATH_NO_FIRMLINK) {
+                       bpflags |= BUILDPATH_NO_FIRMLINK;;
+               }
+               if (flags & VN_GETPATH_VOLUME_RELATIVE) {
+                       bpflags |= (BUILDPATH_VOLUME_RELATIVE | BUILDPATH_NO_FIRMLINK);
+               }
+               if (flags & VN_GETPATH_NO_PROCROOT) {
+                       bpflags |= BUILDPATH_NO_PROCROOT;
+               }
+       }
+
+       error = build_path_with_parent(vp, dvp, pathbuf, local_len, &local_len, mntlen, bpflags, vfs_context_current());
+
+       if (local_len >= 0 && local_len <= (int)*len) {
+               *len = (size_t)local_len;
+       }
+
+       return error;
+}
+
 int
 vn_getcdhash(struct vnode *vp, off_t offset, unsigned char *cdhash)
 {
@@ -3899,6 +3933,12 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2,
                error = safedounmount(mp, flags, ctx);
                break;
        case VFS_CTL_STATFS:
+#if CONFIG_MACF
+               error = mac_mount_check_stat(ctx, mp);
+               if (error != 0) {
+                       break;
+               }
+#endif
                req->newidx = 0;
                if (is_64_bit) {
                        req->newptr = vc.vc64.vc_ptr;