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Full Discussion: Finding capped memory of a non global zone
Operating Systems Solaris Finding capped memory of a non global zone Post 302921155 by jim mcnamara on Wednesday 15th of October 2014 11:17:54 AM
Old 10-15-2014
Not really for a regular user. It is /etc/zones/zonename.xml only visible from the global zone.

Sun took extra care to be sure there is no way to "escape" directly from the virtual machine (zone) into the controlling domain. That would create a horrible security hole. And some data must exist locally in kernel or zsched memory, which requires privileged access.

Use ssh - that reads directly from the global zone via a "proxy". I don't get your requirement for local access. Unless you are a programmer writing code and cannot access the global zone. If so, then if the mcap is absolutely required you will have to work with your sysadmin on that requirement. S/he may write some code for you or "place" a file just after boot time:

Code:
cp /etc/zones/*.xml /etc/zones/zonename/root/tmp/

Which is a small security issue, compared to granting users access. You would then see the file you need in /tmp. This does not accomodate the use of prctl to dynamically change zone resource control values during runtime.

Code:
grep 'mcap_physcap' /etc/zones/zonename.xml
<mcap physcap="34359738368"/>

so
Code:
mcap=$(ssh zonename "grep 'mcap_physcap' /etc/zones/${zonename}.xml" )

You can then parse the number in the variable mcap.
Last edited by jim mcnamara; 10-15-2014 at 12:38 PM..
This User Gave Thanks to jim mcnamara For This Post:
CuriousDev
 

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LEARN ABOUT MINIX

rem_drv

rem_drv(1M)                                                                                                                            rem_drv(1M)

NAME

       rem_drv - remove a device driver from the system

SYNOPSIS

       rem_drv [-b basedir] device_driver

       The  rem_drv command informs the system that the device driver device_driver is no longer valid. If possible, rem_drv unloads device_driver
       from memory. rem_drv also updates the system driver configuration files.

       If rem_drv has been executed, the next time the system is rebooted it automatically performs a reconfiguration boot (see kernel(1M)).

       The following options are supported:

       -b basedir      Sets the path to the root directory of the diskless client. Used on the server to execute rem_drv for a client. The  client
                       machine must be rebooted to unload the driver.

                       Note -  The  root  file system of any non-global zones must not be referenced with the -b option. Doing so might damage the
                               global zone's file system, might compromise the security of the global zone, and might damage the non-global zone's
                               file system. See zones(5).

       Example 1: Removing the sd Driver

       The following example removes the sd driver from use:

       example% rem_drv sd

       Example 2: Removing a Diskless Client

       The  following example removes the driver from the sun1 diskless client. The driver is not uninstalled or unloaded until the client machine
       is rebooted.

       example% rem_drv -b /export/root/sun1 sd

       Note the caveat on the use of the -b option in the description of that option, above.

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

       add_drv(1M), kernel(1M), update_drv(1M), attributes(5), devfs(7FS)

                                                                    6 Apr 2005                                                         rem_drv(1M)
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