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Jan Höppner c729696bcf s390/dasd: Recognise data for ESE volumes
In order to work with Extent Space Efficient (ESE) volumes, certain
viable information about those volumes and the corresponding extent
pool (such as extent size, configured space, allocated space, etc.) can
be provided.

Use the CCW commands Volume Storage Query and Logical Configuration
Query to receive detailed information about ESE volumes and the extent
pool respectively. These information are made accessible via internal
functions for subsequent users, and via sysfs attributes for userpsace
usage.

The new sysfs attributes reside in separate directories called capacity
and extent_pool.

attributes:
ese:
    0/1 depending on whether the volume is an ESE volume

Capacity related attributes:
space_allocated:
    Space currently allocated by the volume (in cyl)
space_configured:
    Remaining space in the extent pool (in cyl)
logical_capacity:
    The entire addressable space for this volume (in cyl)

Extent Pool related attributes:
pool_id:
    ID of the extent pool the volume in question resides in
pool_oos:
    Extent pool is out-of-space
extent_size:
    Size of a single extent in this pool
cap_at_warnlevel
    Extent pool capacity at warn level
warn_threshold:
    Threshold at which percentage of remaining extent pool space a
    warning message is issued

Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2019-07-11 20:39:53 +02:00
arch s390 updates for the 5.3 merge window 2019-07-08 10:06:12 -07:00
block blk-mq: fix up placement of debugfs directory of queue files 2019-07-06 10:07:38 -06:00
certs treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-05 13:31:19 +09:00
Documentation s390 updates for the 5.3 merge window 2019-07-08 10:06:12 -07:00
drivers s390/dasd: Recognise data for ESE volumes 2019-07-11 20:39:53 +02:00
fs Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-07-06 09:53:08 -07:00
include s390 updates for the 5.3 merge window 2019-07-08 10:06:12 -07:00
init initramfs: fix populate_initrd_image() section mismatch 2019-06-29 16:43:45 +08:00
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kernel s390 updates for the 5.3 merge window 2019-07-08 10:06:12 -07:00
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CREDITS MAINTAINERS: Farewell Martin Schwidefsky 2019-05-31 10:14:11 +02:00
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MAINTAINERS s390 updates for the 5.3 merge window 2019-07-08 10:06:12 -07:00
Makefile Linux 5.2 2019-07-07 15:41:56 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.