xnu-4570.1.46.tar.gz

[apple/xnu.git] / bsd / sys / guarded.h

diff --git a/bsd/sys/guarded.h b/bsd/sys/guarded.h
index 57c9661e7c329d455e49f491e90fc0cff3e72ad1..ae1ec05f983300d583071e864ec0e2135a5e8f28 100644 (file)
--- a/bsd/sys/guarded.h
+++ b/bsd/sys/guarded.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2016 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -32,6 +32,7 @@
 #include <sys/types.h>
 #include <sys/cdefs.h>
 
+#include <sys/_types/_iovec_t.h>
 #ifdef PRIVATE
 
 __BEGIN_DECLS
@@ -46,24 +47,29 @@ typedef __uint64_t guardid_t;
 #if !defined(KERNEL)
 extern int guarded_open_np(const char *path, 
        const guardid_t *guard, u_int guardflags, int flags, ...);
+extern int guarded_open_dprotected_np(const char *path, 
+       const guardid_t *guard, u_int guardflags, int flags, 
+       int dpclass, int dpflags, ...);
 extern int guarded_kqueue_np(const guardid_t *guard, u_int guardflags);
 extern int guarded_close_np(int fd, const guardid_t *guard);
 extern int change_fdguard_np(int fd, const guardid_t *guard, u_int guardflags,
        const guardid_t *nguard, u_int nguardflags, int *fdflagsp);
+extern ssize_t guarded_write_np(int fd, const guardid_t *guard, const void *buf, size_t nbyte);
+extern ssize_t guarded_pwrite_np(int fd, const guardid_t *guard, const void *buf, size_t nbyte, off_t offset);
+extern ssize_t guarded_writev_np(int fd, const guardid_t *guard, const struct iovec *iovp, int iovcnt);
 #endif /* KERNEL */
 
-/*
- * Guard types.
- *
- * GUARD_TYPE_FD: Guarded file descriptor.
- */
-#define        GUARD_TYPE_FD           0x2
+#ifndef GUARD_TYPE_FD
+/* temporary source compat: use <kern/exc_guard.h> instead */
+#define GUARD_TYPE_FD          0x2
+#endif
 
 /*
  * File descriptor guard flavors.
  */
 
-/* Forbid close(2), and the implicit close() that a dup2(2) may do.
+/*
+ * Forbid close(2), and the implicit close() that a dup2(2) may do.
  * Forces close-on-fork to be set immutably too.
  */
 #define GUARD_CLOSE            (1u << 0)
@@ -85,19 +91,79 @@ extern int change_fdguard_np(int fd, const guardid_t *guard, u_int guardflags,
  */
 #define GUARD_FILEPORT         (1u << 3)
 
+/*
+ * Forbid writes on a guarded fd
+ */
+#define GUARD_WRITE            (1u << 4)
+
 /*
  * Violating a guard results in an error (EPERM), and potentially
  * an exception with one or more of the following bits set.
  */
-enum guard_exception_codes {
+enum guard_fd_exception_codes {
        kGUARD_EXC_CLOSE        = 1u << 0,      /* close of a guarded fd */
        kGUARD_EXC_DUP          = 1u << 1,      /* dup of a guarded fd */
        kGUARD_EXC_NOCLOEXEC    = 1u << 2,      /* clear close-on-exec */
        kGUARD_EXC_SOCKET_IPC   = 1u << 3,      /* sendmsg of a guarded fd */
        kGUARD_EXC_FILEPORT     = 1u << 4,      /* fileport_makeport .. */
-       kGUARD_EXC_MISMATCH     = 1u << 5       /* wrong guard for guarded fd */
+       kGUARD_EXC_MISMATCH     = 1u << 5,      /* wrong guard for guarded fd */
+       kGUARD_EXC_WRITE        = 1u << 6       /* write on a guarded fd */
+};
+
+/*
+ * Experimental guarded vnode support
+ */
+#define VNG_RENAME_TO          (1u << 0)
+#define VNG_RENAME_FROM                (1u << 1)
+#define VNG_UNLINK             (1u << 2)
+#define VNG_WRITE_OTHER                (1u << 3)
+#define VNG_TRUNC_OTHER                (1u << 4)
+#define VNG_LINK               (1u << 5)
+#define VNG_EXCHDATA           (1u << 6)
+
+#define VNG_ALL \
+       (VNG_RENAME_TO | VNG_RENAME_FROM | VNG_UNLINK | VNG_LINK | \
+        VNG_WRITE_OTHER | VNG_TRUNC_OTHER | VNG_EXCHDATA)
+
+struct vnguard_set {
+       int vns_fd;
+       unsigned vns_attrs;
+       guardid_t vns_guard;
 };
 
+#define VNG_SYSC_PING          0
+#define VNG_SYSC_SET_GUARD     1
+
+#define VNG_POLICY_NAME                "vnguard"
+
+/*
+ * Violating a guard may result in an error (EPERM), and potentially
+ * an exception with one or more of the following bits set.
+ */
+enum guard_vn_exception_codes {
+       kGUARD_EXC_RENAME_TO    = VNG_RENAME_TO,
+       kGUARD_EXC_RENAME_FROM  = VNG_RENAME_FROM,
+       kGUARD_EXC_UNLINK       = VNG_UNLINK,
+       kGUARD_EXC_WRITE_OTHER  = VNG_WRITE_OTHER,
+       kGUARD_EXC_TRUNC_OTHER  = VNG_TRUNC_OTHER,
+       kGUARD_EXC_LINK         = VNG_LINK,
+       kGUARD_EXC_EXCHDATA     = VNG_EXCHDATA,
+};
+
+#if defined(KERNEL)
+
+/* Guard violation behaviors: not all combinations make sense */
+
+#define kVNG_POLICY_LOGMSG     (1u << 0)
+#define kVNG_POLICY_EPERM      (1u << 1)
+#define kVNG_POLICY_EXC                (1u << 2)
+#define kVNG_POLICY_EXC_CORPSE (1u << 3)
+#define kVNG_POLICY_SIGKILL    (1u << 4)
+
+extern int vnguard_exceptions_active(void);
+extern void vnguard_policy_init(void);
+#endif /* KERNEL */
+
 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 
 __END_DECLS