Re: Adding subroot information to /proc/mounts, or obtaining that through other means

[Chuck Lever <chuck.lever@oracle.com>]

[-- Attachment #1: Type: text/plain, Size: 931 bytes --]

Al Viro wrote:
> On Wed, Jun 20, 2007 at 01:57:33PM -0700, H. Peter Anvin wrote:
>> ... or, alternatively, add a subfield to the first field (which would
>> entail escaping whatever separator we choose):
>>
>> /dev/md6 /export ext3 rw,data=ordered 0 0
>> /dev/md6:/users/foo /home/foo ext3 rw,data=ordered 0 0
>> /dev/md6:/users/bar /home/bar ext3 rw,data=ordered 0 0
> 
> Hell, no.  The first field is in principle impossible to parse unless
> you know the fs type.
> 
> How about making a new file with sane format?  From the very
> beginning.  E.g. mountpoint + ID + relative path + type + options,
> where ID uniquely identifies superblock (e.g. numeric st_dev)
> and backing device (if any) is sitting among the options...

To support NFS client performance statistics, I recently added 
/proc/self/mountstats.  That might be a place to add details about 
--move and --bind mounts without changing the format of /proc/mounts.

[-- Attachment #2: chuck.lever.vcf --]
[-- Type: text/x-vcard, Size: 291 bytes --]

begin:vcard
fn:Chuck Lever
n:Lever;Chuck
org:Oracle Corporation;Corporate Architecture: Linux Projects Group
adr:;;1015 Granger Avenue;Ann Arbor;MI;48104;USA
title:Principal Member of Staff
tel;work:+1 248 614 5091
x-mozilla-html:FALSE
url:http://oss.oracle.com/~cel/
version:2.1
end:vcard