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828 Commits

Author SHA1 Message Date
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
829c0864cb Minor, but very important condition fix. The current one can never be true. 2004-09-27 19:32:26 +00:00
Pawel Jakub Dawidek
cf41526bdc Decrease kern.geom.mirror.timeout to 4, so it is smaller than 
vfs.root.mountdelay by default.
 2004-09-27 13:47:37 +00:00
Pawel Jakub Dawidek
0217ba9893 Forgot to commit addition of ds_resync field. 2004-09-26 20:42:35 +00:00
Pawel Jakub Dawidek
e8adbe4499 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
 2004-09-26 20:41:07 +00:00
Pawel Jakub Dawidek
31522023f9 Simplify code a bit. 2004-09-26 20:30:15 +00:00
Poul-Henning Kamp
a7830346e2 Assert topology is held in g_dev_getprovider(). 
Don't call devsw().  It is not necessary, and we do not need to hold dev_lock
to compare the devsw pointer to our own since we do not dereference it.
 2004-09-24 06:43:20 +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
Max Khon
9cf3607da2 Use correct malloc type when freeing memory allocated by g_read_data. 
PR:		71431
Submitted by:	daichi
 2004-09-19 10:27:46 +00:00
Lukas Ertl
b916fcec4d Single concat or striped plexes don't need no special initialization 
if their subdisks are all available, so let them be brought up.
 2004-09-18 18:03:20 +00:00
Lukas Ertl
67e3ab6ee5 Re-vamp how I/O is handled in volumes and plexes. 
Analogous to the drive level, give each volume and plex a worker thread
that picks up and processes incoming and completed BIOs.

This should fix the data corruption issues that have come up a few
weeks ago and improve performance, especially of RAID5 plexes.

The volume level needs a little work, though.
 2004-09-18 13:44:43 +00:00
Max Khon
b3f05a2e9e g_nop_create: destroy newly created provider in case of errors. 2004-09-16 15:28:48 +00:00
Lukas Ertl
12653dec9d Give the DRIVE geom a worker thread that picks up incoming bios, 
sends them down, and takes care of the finished bios.  This makes it
easier to handle I/O errors at drive level.
 2004-09-13 21:01:36 +00:00
Lukas Ertl
fce2deb197 Rename gv_kill_thread() to gv_kill_plex_thread(), since there are more 
threads to come.
 2004-09-13 17:44:47 +00:00
Lukas Ertl
a0781b98f3 Save the config back to disk when a drive goes down. 2004-09-13 17:33:52 +00:00
Lukas Ertl
ea29a30466 Read a whole sector instead of GV_HDR_LEN, since a sector might be 
bigger (i.e. on CD-ROMs).
 2004-09-13 17:27:58 +00:00
Pawel Jakub Dawidek
7e8ca741ca Make kern.geom.debugflags sysctl tunable from /boot/loader.conf. 
It will help to debug problems when booting.

Approved by:	phk
 2004-09-13 14:58:27 +00:00
Poul-Henning Kamp
4090065137 Fix a problem that shows up if less than the full complement of 
lock sectors are defined ("number_of_keys" argument to gbde init being
less than 4 in the default compile).
 2004-09-11 17:58:53 +00:00
Poul-Henning Kamp
cbca0b53e5 Respect that G_BDE_MAXKEYS is a compile time variable. 2004-09-11 17:57:51 +00:00
Max Khon
51eb0765c6 Do not compile in zlib.c. Add a dependency on module instead. 2004-09-08 17:27:31 +00:00
Pawel Jakub Dawidek
f7b4d339ac Show current status of mirror device directly. 
Suggested by:	Krzysztof Ciep³ucha <kris@home.pl>
 2004-09-08 16:37:22 +00:00
Poul-Henning Kamp
5ae652c0ed For removable devices without media we set a zero mediasize but a non-zero 
sectorsize in order to avoid a lot of checks around various divisions etc.

Enforce the sectorsize being > 0 with a KASSERT on successful open.

Fix scsi_cd.c to return 2k sectors when no media inserted.
 2004-09-05 21:15:58 +00:00
Pawel Jakub Dawidek
6d7b8aecd3 Allow to configure debug level from /boot/loader.conf. 2004-08-30 18:50:06 +00:00
Poul-Henning Kamp
dcbd0fe5aa Add more KASSERTS and checks. 2004-08-30 09:33:06 +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
Lukas Ertl
5bad268cdc Move config_new_drive() to the correct place and rename it to 
gv_config_new_drive().
 2004-08-27 21:32:18 +00:00
Poul-Henning Kamp
a2033c9615 Introduce g_alloc_bio() as a waiting variant of g_new_bio(). 
Use in places where we can sleep and where we previously failed to check
for a NULL pointer.

MT5 candidate.
 2004-08-27 14:43:11 +00:00
Lukas Ertl
4328802ce9 When attaching a consumer from a volume to a plex, check if the 
volume already has a plex attached and adjust the access counts
of the new consumer accordingly.
 2004-08-26 21:04:41 +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
f0c8658d4e Dump disk number. 2004-08-25 12:14:44 +00:00
Pawel Jakub Dawidek
c8b906bcbe Allow to set kern.geom.mirror.timeout from /boot/loader.conf. 2004-08-23 20:42:34 +00:00
Lukas Ertl
a3423d4c6f Compare the addresses of two RAID5 work packets directly instead 
of the addresses of their related bios when locking one out, since
they could share a bio and this could lead to parity corruption.
 2004-08-23 17:50:18 +00:00
Lukas Ertl
c4bdc6fc32 Implement the possibility to remove drives. 2004-08-22 17:07:55 +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
Lukas Ertl
45d0fdcda9 Add forgotten format specifier in a KASSERT and shut up the compiler. 
Submitted by: Gavin Atkinson <gavin.atkinson@ury.york.ac.uk>
 2004-08-22 13:34:24 +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
Lukas Ertl
83bfcb1092 A volume can be up if it has a degraded RAID5 plex. 2004-08-19 12:03:27 +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
Poul-Henning Kamp
a9654c8c58 Do not override the class provided dumpconf function. 2004-08-18 21:42:08 +00:00
Lukas Ertl
9a8bd51965 Pretty print some informational messages. 2004-08-18 20:43:56 +00:00
Lukas Ertl
d30f29867e Fix a stupid bug in the drive taste function: when checking if a 
drive is known to the configuration check also if it already has a geom.
Without this check several needless geoms are created and valid
configuration data was overwritten.

This change obsoletes the need for a separate geom to taste an
offered provider and the consumer doesn't need to be opened with the
exclusive bit set.
 2004-08-18 20:34:45 +00:00
Pawel Jakub Dawidek
b25aec32ff NOP class doesn't operate on metadata, so the spoil event can be safely 
ignored.
 2004-08-18 16:58:42 +00:00
Pawel Jakub Dawidek
28b31df727 Dump device status on 'list' command. 2004-08-18 16:46:51 +00:00
Pawel Jakub Dawidek
f1ad62a4d8 Bump synchronization ID if we are sure, that we have ACTIVE components. 2004-08-18 07:28:48 +00:00
David E. O'Brien
fa6a78376f Minor style.9 cleanup. 2004-08-16 10:33:35 +00:00