xnu-3789.70.16.tar.gz

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

diff --git a/bsd/sys/mount_internal.h b/bsd/sys/mount_internal.h
index 107467f08297e9799c7088c3c0db778930d2db90..6393fd71205adf9d1d3b367ddf0b1535eaa28577 100644 (file)
--- a/bsd/sys/mount_internal.h
+++ b/bsd/sys/mount_internal.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -195,6 +195,8 @@ struct mount {
        char            fstypename_override[MFSTYPENAMELEN];
 
        uint32_t        mnt_iobufinuse;
+
+       lck_mtx_t       mnt_iter_lock;          /* mutex that protects iteration of vnodes */
 };
 
 /*
@@ -232,6 +234,7 @@ extern struct mount * dead_mountp;
  *             because the bits here were broken out from the high bits
  *             of the mount flags.
  */
+#define MNTK_NOSWAP            0x00000080  /* swap files cannot be used on this mount */
 #define MNTK_SWAP_MOUNT                0x00000100      /* we are swapping to this mount */
 #define MNTK_DENY_READDIREXT 0x00000200 /* Deny Extended-style readdir's for this volume */
 #define MNTK_PERMIT_UNMOUNT    0x00000400      /* Allow (non-forced) unmounts by UIDs other than the one that mounted the volume */
@@ -270,7 +273,7 @@ extern struct mount * dead_mountp;
 #define MNT_LITER              0x00000010      /* mount in iteration */
 #define MNT_LNEWVN             0x00000020      /* mount has new vnodes created */
 #define MNT_LWAIT              0x00000040      /* wait for unmount op */
-#define MNT_LITERWAIT          0x00000080      /* mount in iteration */
+#define MNT_LUNUSED            0x00000080      /* available flag bit, used to be MNT_LITERWAIT */
 #define MNT_LDEAD              0x00000100      /* mount already unmounted*/
 #define MNT_LNOSUB             0x00000200      /* submount - no recursion */
 
@@ -421,6 +424,8 @@ void mount_lock_destroy(mount_t);
 void mount_lock(mount_t);
 void mount_lock_spin(mount_t);
 void mount_unlock(mount_t);
+void mount_iterate_lock(mount_t);
+void mount_iterate_unlock(mount_t);
 void mount_lock_renames(mount_t);
 void mount_unlock_renames(mount_t);
 void mount_ref(mount_t, int);