Bug 151473 - Kernel does not show 'acl' aption in /proc/mounts
Summary: Kernel does not show 'acl' aption in /proc/mounts
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel   
(Show other bugs)
Version: 4.0
Hardware: All Linux
Target Milestone: ---
: ---
Assignee: Stephen Tweedie
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2005-03-18 12:25 UTC by Milan Kerslager
Modified: 2007-11-30 22:07 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-04-22 10:04:52 UTC
Type: ---
Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Description Milan Kerslager 2005-03-18 12:25:39 UTC
When (re)mounting a FS with 'acl' option, this is not showed up in /proc/mounts.
As ACL does not work when a FS is mounted without this option, this could be
worth to publish this information though /proc/mounts the same way as other
mount options.

Comment 2 Stephen Tweedie 2005-04-22 10:04:52 UTC
That's how it's expected to work.  The kernel tracks _some_ of the flags in
/proc/mounts (specifically, those ones which are the same across all
filesystems); others are tracked in user space via /etc/mtab.  The mount(8)
binary assembles both of these to provide mount information.


  # mount
  /dev/hda6 on / type ext3 (rw)
  # mount -o remount,acl /
  # mount
  /dev/hda6 on / type ext3 (rw,acl)
  # mount -o remount,noacl /
  # mount
  /dev/hda6 on / type ext3 (rw,noacl)

That has been the defined behaviour for ages; if you want to see all the
information, call mount(8) directly, don't just parse /proc/mounts.

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