Commit Graph

41 Commits

Author SHA1 Message Date
Pawel Jakub Dawidek
e68909854c - Add md_provsize field to metadata, which will help with
shared-last-sector problem.
  After this change, even if there is more than one provider with the same
  last sector, the proper one will be chosen based on its size.
  It still doesn't fix the 'c' partition problem (when da0s1 can be confused
  with da0s1c) and situation when 'a' partition starts at offset 0
  (then da0s1a can be confused with da0s1 and da0s1c). One can use '-h'
  option there, when creating device or avoid sharing last sector.
  Actually, when providers share the same last sector and their size is equal,
  they provide exactly the same data, so the name (da0s1, da0s1a, da0s1c)
  isn't important at all.
- Provide backward compatibility.
- Update copyright's year.

MFC after:	1 week
2005-02-27 23:07:47 +00:00
Pawel Jakub Dawidek
0218292cdf Update copyright in files changed this year. 2005-02-16 22:14:52 +00:00
Pawel Jakub Dawidek
437566858a Increase default synchronization speed.
MFC after: 3 days
2005-01-09 14:43:39 +00:00
Pawel Jakub Dawidek
ea973705b3 - Fix 'rebuild' command - it can no longer relay on retaste event
(we ignore it).
- Remove code used for handling spoil events, as spoiling is not possible
  anymore, because we keep consumers open for writing all the time.

MFC after:	4 days
2005-01-04 12:15:21 +00:00
Pawel Jakub Dawidek
cdca9c06d9 Remove unused #include. 2005-01-03 12:53:10 +00:00
John Baldwin
63710c4d35 Stop explicitly touching td_base_pri outside of the scheduler and simply
set a thread's priority via sched_prio() when that is the desired action.
The schedulers will start managing td_base_pri internally shortly.
2004-12-30 20:29:58 +00:00
Pawel Jakub Dawidek
7f456a7d61 Remove debug code. 2004-12-28 21:52:45 +00:00
Pawel Jakub Dawidek
a245a5483c - Add genid field to the metadata which will allow to improve reliability a bit.
After this change, when component is disconnected because of an I/O error,
  it will not be connected and synchronized automatically, it will be logged
  as broken and skipped. Autosynchronization can occur, when component is
  disconnected (on orphan event) and connected again - there were no I/O
  error, so there is no need to not connected the component, but when there were
  writes while it wasn't connected, it will be synchronized.
  This fix cases, when component is disconnected because of I/O error and can be
  connected again and again.
- Bump version number.
- Implement backward compatibility mechanism. After this change when metadata in
  old version is detected, it is automatically upgraded to the new (current)
  version.
2004-12-25 19:17:47 +00:00
Pawel Jakub Dawidek
4485f00081 Now, when force device destruction is done on shutdown, hide warning,
that device cannot be destroyed immediately, under debug=1.

Suggested by:	simon
2004-12-21 19:50:18 +00:00
Pawel Jakub Dawidek
d97d5ee931 Improve reliability and clean up code a bit.
For more details check src/sys/geom/mirror/g_mirror.c rev.1.47,1.48,1.49,1.50.
2004-12-21 19:30:59 +00:00
Pawel Jakub Dawidek
89dd8e5326 bioq_insert_head() function is already in subr_disk.c. 2004-12-13 13:02:06 +00:00
Pawel Jakub Dawidek
afd05d741f When initializing device, set d_softc and d_no fields for all components,
because we know it then and we need it when inserting a component which
wasn't destroyed while device was running.

Reported by:	Michael Handler <handler@grendel.net>
MFC after:	1 week
2004-12-04 21:20:59 +00:00
Pawel Jakub Dawidek
085f43afae Before trying to update metadata (so open consumer for writing), be sure
that the events queue is empty. In other case we're able to hit the race
where for example da0s1 is tasted by some other class, which means that
da0 is open with exclusive bit set, which means that we can't open da0
for writing if it is our component.

Reported by:	Attila Nagy <bra@fsn.hu> (and somebody else sometime ago,
		                          but I cannot find who it was)
2004-11-09 23:27:21 +00:00
Pawel Jakub Dawidek
b36b4bfb55 Don't rely on DIRTY flag to be sure that consumer if open, because
DIRTY flag can be removed in idle process. Use consumer's acw field
instead to avoid opening consumer twice.
2004-11-09 23:15:40 +00:00
Pawel Jakub Dawidek
9c6a3f03c6 For BIO_READ check if provider is open for reading and for BIO_WRITE,
check if provider is open for writing.
This fixes panic when device is open only for writing and we send write
request.
2004-11-09 23:04:45 +00:00
Pawel Jakub Dawidek
fdc3c6ce23 Drop Giant lock before grabbing the topology lock. 2004-11-09 00:35:08 +00:00
Pawel Jakub Dawidek
463674f7e0 If device is marked as beeing destroyed, deny all access requests. 2004-11-08 20:23:53 +00:00
Pawel Jakub Dawidek
9bb09163fc Don't forget to make sure that there are no not-finished requests before
marking components as clean.

Pointed out by:	scottl
2004-11-05 17:18:39 +00:00
Pawel Jakub Dawidek
4d006a98d1 - Mark all raid3 components as clean after kern.geom.raid3.idletime seconds.
- Make kern.geom.raid3.timeout variable tunable.
2004-11-05 13:12:58 +00:00
Pawel Jakub Dawidek
9da3072cae Mark raid3 devices as clean on shutdown (after all file systems are
unmounted).

Suggested by:	scottl
2004-11-05 13:01:25 +00:00
Pawel Jakub Dawidek
79e614937e - Use ->index consumer's field to track number of in-flight requests.
- Remove unused #include.
2004-11-05 12:42:16 +00:00
Pawel Jakub Dawidek
604fce4f60 Just use MAXPHYS as maximum I/O request size, instead of using my own
#define for this purpose.
No functional change.
2004-09-28 07:33:37 +00:00
Pawel Jakub Dawidek
e5e7825cc3 Decrease kern.geom.raid3.timeout to 4, so it is smaller than
vfs.root.mountdelay by default.
2004-09-27 22:12:14 +00:00
Pawel Jakub Dawidek
d2fb9c62e2 Avoid race while synchronizing components. It is very hard to bump into,
but it is possible:
1. Read data from good component for synchronization.
2. Write data to the same area.
3. Write synchronization data, which are now stale.

Found by:	tegge (for gmirror)
2004-09-27 20:32:35 +00:00
Pawel Jakub Dawidek
201dfcf143 This is not needed anymore, it is forced in GEOM now.
Actually, it can even cause some problems, because GEOM requires sectorsize
to be more than 0 on first access, not on provider creation, so we can skip
valid providers by doing this check here.

Reported by:	Divacky Roman <xdivac02@stud.fit.vutbr.cz>
		Sven Willenberger <sven@dmv.com>
2004-09-20 17:26:25 +00:00
Pawel Jakub Dawidek
6d7b8aecd3 Allow to configure debug level from /boot/loader.conf. 2004-08-30 18:50:06 +00:00
Pawel Jakub Dawidek
45d5e85a40 GCC, ehh. 2004-08-29 14:29:30 +00:00
Pawel Jakub Dawidek
c0d68b6ef2 Use sc->sc_mediasize instead of sc->sc_provider->mediasize which contains
exactly the same value, but is shorter.
2004-08-28 02:35:43 +00:00
Pawel Jakub Dawidek
08249e9e6e Warn the user if we are not going to use whole provider space.
Requested by:	Michael Handler <handler@grendel.net>
2004-08-28 02:34:10 +00:00
Pawel Jakub Dawidek
16ebaa0793 Don't allow to insert providers, which are too small.
Reported by:	Michael Handler <handler@grendel.net>
2004-08-28 02:02:48 +00:00
Pawel Jakub Dawidek
29c78ab315 Skip providers with not defined sector size.
Reported by:	kuriyama
2004-08-26 12:42:47 +00:00
Pawel Jakub Dawidek
4cf67afe37 Log verification errors at level 1. 2004-08-25 19:18:07 +00:00
Pawel Jakub Dawidek
dba915cfee Implementation of 'verify reading' algorithm, which uses parity data for
verification of regular data when device is in complete state.
On verification error, EIO error is returned for the bio and sysctl
kern.geom.raid3.stat.parity_mismatch is increased.

Suggested by:	phk
2004-08-22 16:21:12 +00:00
Pawel Jakub Dawidek
d12bd83e9b Add version history. 2004-08-21 21:15:03 +00:00
Pawel Jakub Dawidek
f5a2f7feac Implement new reading algorithm, which will use parity component for reading
as well, even if device is in complete state.
I observe 40% of speed-up with this option for random read operations,
but slowdown for sequential reads.
Basically, without this option reading from a RAID3 device built from 5
components (c0-c4) looks like this:

	Request no.	Used components
	1		c0+c1+c2+c3
	2		c0+c1+c2+c3
	3		c0+c1+c2+c3

With the new feature:

	Request no.	Used components
	1		c0+c1+c2+c3
	2		(c1^c2^c3^c4)+c1+c2+c3
	3		c0+(c0^c2^c3^c4)+c2+c3
	4		c0+c1+(c0^c1^c3^c4)+c3
	5		c0+c1+c2+(c0^c1^c2^c4)
	6		c0+c1+c2+c3
	[...]
2004-08-21 18:11:46 +00:00
Pawel Jakub Dawidek
d86bc96cab We really don't want to receive spoil event for synchroniztion consumers. 2004-08-18 23:33:37 +00:00
Pawel Jakub Dawidek
28b31df727 Dump device status on 'list' command. 2004-08-18 16:46:51 +00:00
David E. O'Brien
fa6a78376f Minor style.9 cleanup. 2004-08-16 10:33:35 +00:00
Pawel Jakub Dawidek
809a9dc601 Decrease debug level to 0. 2004-08-16 08:33:04 +00:00
Pawel Jakub Dawidek
5e6db16cd6 Fix warning. 2004-08-16 08:21:31 +00:00
Pawel Jakub Dawidek
2d1661a5b6 Introduce GEOM RAID3 class, i.e. kernel module, which implements RAID3
transformation and graid3(8) userland utility, which can be used for
configuration. No manual page yet, sorry.

Hardware provided by:	Daniel Seuffert
2004-08-16 06:23:14 +00:00