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From: Yar Tikhiy <yar@FreeBSD.org>
Date: Thu, 14 Feb 2008 17:04:31 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Cc: 
Subject: cvs commit: src/sys/kern vfs_mount.c
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yar         2008-02-14 17:04:31 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_mount.c 
  Log:
  In the new order of things dictated by nmount(2), a read-only mount
  is to be requested via a "ro" option.  At the same time, MNT_RDONLY
  is gradually becoming an indicator of the current state of the FS
  instead of a command flag.  Today passing MNT_RDONLY alone to the
  kernel's mount machinery will lead to various glitches.  (See the
  PRs for examples.)
  
  Therefore mount the root FS with a "ro" option instead of the
  MNT_RDONLY flag.  (Note that MNT_RDONLY still is added to the mount
  flags internally, by vfs_donmount(), if "ro" was specified.)
  
  To be able to pass "ro" cleanly to kernel_vmount(), teach the latter
  function to accept options with NULL values.
  
  Also correct the comment explaining how mount_arg() handles length
  of -1.
  
  PR:             bin/106636 kern/120319
  Submitted by:   Jaakko Heinonen <see PR kern/120319 for email> (originally)
  
  Revision  Changes    Path
  1.274     +4 -3      src/sys/kern/vfs_mount.c