immutable flag or similar for Solaris 10 / ZFS Post: 302470533

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Operating Systems Solaris immutable flag or similar for Solaris 10 / ZFS Post 302470533 by jlliagre on Wednesday 10th of November 2010 10:23:16 AM

11-10-2010

Registered User

ZFS implements the immutable flag. Here is how to use it:

Code:

# mkdir /pool/im   
# ls -d/ v /pool/im
drwxr-xr-x   2 root     root           2 nov. 10 16:07 /pool23g/ro/im
        {archive,nohidden,noreadonly,nosystem,noappendonly,nonodump,noimmutable,av_modified,noav_quarantined,nonounlink}
# chmod S+ci /pool/im
# ls -d/ v /pool23g/ro/im
drwxr-xr-x   2 root     root           2 nov. 10 16:07 /pool/im
        {archive,nohidden,noreadonly,nosystem,noappendonly,nonodump,immutable,av_modified,noav_quarantined,nonounlink}
# id
uid=0(root) gid=0(root)
# rmdir /pool/im
rmdir: /pool/im: cannot remove [Not owner]
# chmod S-ci /pool/im
# rmdir /pool/im

However, I believe this only works with SunOS 5.11 based OSes, not Solaris 10. I have no idea about if this will be backported.
An alternative would be a dtrace script that will monitor any attempt to remove that specific directory and make this fails.

jlliagre

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LEARN ABOUT DEBIAN

zdb

zdb(8)							  System Administration Commands						    zdb(8)

NAME

       zdb - ZFS debugger

SYNOPSIS

       zdb pool

DESCRIPTION

       The  zdb command is used by support engineers to diagnose failures and gather statistics. Since the ZFS file system is always consistent on
       disk and is self-repairing, zdb should only be run under the direction by a support engineer.

       If no arguments are specified, zdb, performs basic consistency checks on  the  pool  and  associated  datasets,	and  report  any  problems
       detected.

       Any options supported by this command are internal to Sun and subject to change at any time.

EXIT STATUS

       The following exit values are returned:

       0    The pool is consistent.

       1    An error was detected.

       2    Invalid command line options were specified.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWzfsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Unstable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       zfs(8), zpool(8), attributes(5)

SunOS 5.11							    31 Oct 2005 							    zdb(8)

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