Martchus/mdadm
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80 Commits

Author SHA1 Message Date
Neil Brown
63152c1b33 Unify code into find_free_devnum. 
Two places have code to find a free md device number.  Make this
a subroutine.
 2008-05-05 21:55:36 +10:00
Bill Nottingham
767bd45298 Simplistig locking for --incremental. 
From: Bill Nottingham <notting@redhat.com>

mdadm --incremental doesn't really do any locking. If you get multiple
events in parallel for the same device (that has not yet started), they
will all go down the path to create the array. One will succeed, the
rest will have SET_ARRAY_INFO die with -EBUSY (md: array mdX already has disks!)
and will exit without adding the disk.

Original bug report is: https://bugzilla.redhat.com/show_bug.cgi?id=433932

This is solved by adding very very rudimentary locking. Incremental() now
opens the device with O_EXCL to ensure only one invocation is frobbing the
array at once. A simple loop just tries to open 5 times a second for 5
seconds. If the array stays locked that long, you probably have bigger
issues.
 2008-05-05 19:44:04 +10:00
Bill Nottingham
62552fdfcc Create /dev/md if needed and it doesn't exist. 
From: Bill Nottingham <notting@redhat.com>
 2008-05-05 19:44:01 +10:00
Neil Brown
aba69144fd Remove spaces/tabs from ends of lines. 2007-12-14 20:13:43 +11:00
Neil Brown
dc2ee6b3e3 Make sure --auto=mdp is honoured properly 
This would only create partitioned devices if the device name was a
'standard' name.  This this patch, any name will work.
 2007-10-17 10:00:55 +10:00
maximilian attems
b440882edf mdopen.c don't shadow major() and minor() 
s/(major|minor)/\1_num/

Signed-off-by: maximilian attems <max@stro.at>
Signed-off-by: Neil Brown <neilb@suse.de>
 2007-09-27 10:08:30 +10:00
Neil Brown
8382f19bdc Add new mode: --incremental 
--incremental allows arrays to be assembled one device at a time.
This is expected to be used with udev.
 2006-12-21 17:10:52 +11:00
Neil Brown
7572344665 Default to --auto=yes 
so the array devices with 'standard' names
get created automatically, as this is almost always what is wanted.
 2006-12-14 17:31:10 +11:00
Michael Labuschke
3a43c80392 Check error return on a couple of syscalls. 
From: "Michael Labuschke" <michael@labuschke.de>
 2006-10-23 14:56:35 +10:00
Luca Berra
e60c27d04e Don't fail md_open if array already active. 
From: Luca Berra <bluca@comedia.it>

There is no need and it causes occasional problems.
 2006-10-16 15:27:16 +10:00
Neil Brown
38098016ca Allow symlink creation to be disabled from command line or mdadm.conf 2006-08-11 18:00:05 +10:00
Neil Brown
0a6e1c6743 Create symlinks from /dev into /dev/md 
When (auto)creating devices in /dev/md/, create
an appropriate symlink from /dev to avoid confusion.
 2006-08-11 18:00:00 +10:00
Neil Brown
8aec876d2e More consistent honoring of --configfile 
Never use /etc/mdadm.conf if --config file is given (previously
some code used one, some used the other).
 2006-06-26 15:11:01 +10:00
Neil Brown
d55e3aefc0 Support auto-assembling of stacked devices 
and assorted bugfixes.

Signed-off-by: Neil Brown <neilb@suse.de>
 2006-05-26 03:11:57 +00:00
Neil Brown
2e2642f2c5 Never remove device nodes of active devices. 
This is just too risky.

Signed-off-by: Neil Brown <neilb@suse.de>
 2006-05-26 02:32:15 +00:00
Neil Brown
e7bb5d23a9 Choose better devnumbers and tidy up some issues with finding names. 
Signed-off-by: Neil Brown <neilb@suse.de>
 2006-05-26 01:40:53 +00:00
Neil Brown
4f589ad0c5 Just updaqte copyright dates and email address 
Signed-off-by: Neil Brown <neilb@suse.de>
 2006-05-19 05:25:11 +00:00
Neil Brown
f1ae21c411 Arrange the 'auto' setting in mdadm.conf can choose default type. 
So when you say auto=md or auto=part in mdadm.conf, it give a preference
for type of array, but standard name will override.

But --auto=md is more insistant.

FIXME  I'm not at all happy about handling of names that already exist.
  I don't think that should be removed if the device is active.

Signed-off-by: Neil Brown <neilb@suse.de>
 2006-05-16 07:35:06 +00:00
Neil Brown
5bbb48424b Allow default creation info to to be stored in mdadm.conf 
Default owner, group, mode and 'auto' flag can be given in a 'CREATE' line.

Signed-off-by: Neil Brown <neilb@suse.de>
 2006-05-15 06:02:41 +00:00
Neil Brown
16c6fa807c Create missing /dev files where needed. 
Whenever we need a device file to open, if one cannot be found in /dev,
create a temporary one.

Signed-off-by: Neil Brown <neilb@suse.de>
 2006-03-28 06:26:53 +00:00
Neil Brown
1e0d770c0f Release some compile fixes. 
Signed-off-by: Neil Brown <neilb@suse.de>
 2006-02-06 04:18:12 +00:00
Neil Brown
22a8899586 Sort mdstat entries so that composites are well-ordered. 
This means that "-Ds" lists arrays in an approprate order
for assembly.

Signed-off-by: Neil Brown <neilb@suse.de>
 2006-01-31 00:39:50 +00:00
Neil Brown
8f23b0b3fa Replace sprintf calls with snprintf 
To quiet diet-libc

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-06-14 06:42:13 +00:00
Neil Brown
173fc51539 Add device files created with --auto to list of known device files. 
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-06-14 06:37:57 +00:00
Neil Brown
0bbc98b563 Avoid using lstat, it isn't right. 
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-06-14 06:30:03 +00:00
Neil Brown
a0ef61bfad Fix uninitialised variable compile warning. 
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-04-04 05:16:31 +00:00
Neil Brown
48f7b27ab4 Document new --auto behaviour 
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-04-04 05:16:16 +00:00
Neil Brown
0df46c2ad8 Change MAJOR() etc to major() etc 
This allows for larger device number if glibc supports
it (requires 2.3.3).
Also fail before creating larger device number if glibc
support isn't present.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-04-04 05:16:13 +00:00
Neil Brown
8d80900b49 When assembling with --auto, honour common device names 
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
 2005-04-04 05:16:10 +00:00
Neil Brown
b5e6464503 mdadm-1.8.0 2004-11-01 04:49:34 +00:00