From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: Kay Sievers <kay.sievers@vrfy.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Greg KH <greg@kroah.com>
Subject: Re: [1/4] DST: Distributed storage documentation.
Date: Mon, 10 Dec 2007 15:58:39 +0300 [thread overview]
Message-ID: <20071210125839.GA16789@2ka.mipt.ru> (raw)
In-Reply-To: <3ae72650712100451h6a84d6cfs9b3a2954c13c4612@mail.gmail.com>
On Mon, Dec 10, 2007 at 01:51:43PM +0100, Kay Sievers (kay.sievers@vrfy.org) wrote:
> On Dec 10, 2007 12:47 PM, Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote:
> > diff --git a/Documentation/dst/sysfs.txt b/Documentation/dst/sysfs.txt
> > new file mode 100644
> > index 0000000..79d79dc
> > --- /dev/null
> > +++ b/Documentation/dst/sysfs.txt
> > @@ -0,0 +1,30 @@
> > +This file describes sysfs files created for each storage.
> > +
> > +1. Per-storage files.
> > +Each storage has its own dir /sysfs/devices/$storage_name,
>
> It's always /sys/devices/.
I meant that for each new device, it will be placed into
/sys/devices/its_name, but it can also be accessed via
/sys/bus/dst/devices/
> > +which contains following files:
> > +
> > +alg - contains name of the algorithm used to created given storage
> > +name - name of the storage
> > +nodes - map of the storage (list of nodes and their sizes and starts)
> > +remove_all_nodes - writable file which allows to remove all nodes from given
> > + storage
> > +n-$start-$cookie - per node directory, where
> > + $start - start of the given node in sectors,
> > + $cookie - unique node's id used by DST
> > +
> > +2. Per-node files.
> > +Node's files are located in /sysfs/devices/$storage_name/n-$start-$cookie
> > +directory, described above.
>
> To which class or bus do the devices you create belong? Care to show a
> "tree" or "ls -la" of the device?
It is 'dst' bus.
uganda:~/codes# ls -la /sys/devices/staorge/
total 0
drwxr-xr-x 4 root root 0 2007-12-10 11:46 .
drwxr-xr-x 9 root root 0 2007-12-10 11:46 ..
-r--r--r-- 1 root root 4096 2007-12-10 11:46 alg
lrwxrwxrwx 1 root root 0 2007-12-10 11:46 bus -> ../../bus/dst
drwxr-xr-x 3 root root 0 2007-12-10 11:46 n-0-ffff81003e24117
-r--r--r-- 1 root root 4096 2007-12-10 11:46 name
-r--r--r-- 1 root root 4096 2007-12-10 11:46 nodes
drwxr-xr-x 2 root root 0 2007-12-10 11:46 power
-rw-r--r-- 1 root root 4096 2007-12-10 11:46 remove_all_nodes
lrwxrwxrwx 1 root root 0 2007-12-10 11:46 subsystem -> ../../bus/dst
-rw-r--r-- 1 root root 4096 2007-12-10 11:46 uevent
uganda:~/codes# ls -l /sys/bus/dst/
total 0
drwxr-xr-x 2 root root 0 2007-12-10 09:52 devices
drwxr-xr-x 2 root root 0 2007-12-10 09:52 drivers
-rw-r--r-- 1 root root 4096 2007-12-10 11:46 drivers_autoprobe
--w------- 1 root root 4096 2007-12-10 11:46 drivers_probe
> Kay
--
Evgeniy Polyakov
next prev parent reply other threads:[~2007-12-10 12:59 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <11qqqasdzxczc036@2ka.mipt.ru>
2007-12-10 11:47 ` [0/4] DST: Distributed storage Evgeniy Polyakov
2007-12-10 11:47 ` [1/4] DST: Distributed storage documentation Evgeniy Polyakov
2007-12-10 11:47 ` [2/4] DST: Core distributed storage files Evgeniy Polyakov
2007-12-10 11:47 ` [3/4] DST: Network state machine Evgeniy Polyakov
2007-12-10 11:47 ` [4/4] DST: Algorithms used in distributed storage Evgeniy Polyakov
2007-12-12 9:12 ` Dmitry Monakhov
2007-12-12 10:20 ` Evgeniy Polyakov
2007-12-13 20:43 ` [3/4] DST: Network state machine Dmitry Monakhov
2007-12-14 6:35 ` Evgeniy Polyakov
2007-12-10 12:51 ` [1/4] DST: Distributed storage documentation Kay Sievers
2007-12-10 12:58 ` Evgeniy Polyakov [this message]
2007-12-10 14:31 ` Kay Sievers
2007-12-10 14:50 ` Evgeniy Polyakov
2007-12-10 15:12 ` Evgeniy Polyakov
2007-12-10 19:02 ` Kay Sievers
2007-12-10 19:33 ` Evgeniy Polyakov
2007-12-10 19:44 ` Kay Sievers
2007-12-10 19:51 ` Evgeniy Polyakov
2007-12-10 19:56 ` Kay Sievers
2007-12-10 20:03 ` Evgeniy Polyakov
2008-01-22 19:38 [0/4] DST: Distributed storage: Succumbed to live ant Evgeniy Polyakov
2008-01-22 19:38 ` [1/4] DST: Distributed storage documentation Evgeniy Polyakov
-- strict thread matches above, loose matches on Subject: below --
2007-12-26 11:22 [0/4] DST: Distributed storage: Groundhogs strike back: no New Year for humans Evgeniy Polyakov
2007-12-26 11:22 ` [1/4] DST: Distributed storage documentation Evgeniy Polyakov
2007-12-17 15:03 [0/4] DST: Distributed storage Evgeniy Polyakov
2007-12-17 15:03 ` [1/4] DST: Distributed storage documentation Evgeniy Polyakov
2007-12-17 16:27 ` Kay Sievers
2007-12-04 14:37 [0/4] DST: Distributed storage Evgeniy Polyakov
2007-12-04 14:37 ` [1/4] DST: Distributed storage documentation Evgeniy Polyakov
2007-11-29 12:53 [0/4] dst: Distributed storage Evgeniy Polyakov
2007-11-29 12:53 ` [1/4] dst: Distributed storage documentation Evgeniy Polyakov
2007-12-03 4:50 ` Matt Mackall
2007-12-03 11:16 ` Evgeniy Polyakov
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