Commit Graph

36 Commits

Author SHA1 Message Date
Andrey V. Elsukov
5d807a0e1a Include sys/sbuf.h directly.
Reviewed by:	pjd
2011-07-11 05:22:31 +00:00
Andrey V. Elsukov
ceef8f2477 Prevent non-aligned reading from provider while tasting. Reject
providers with unsupported sectorsize.

Reported by:	Joerg Wunsch
MFC after:	1 week
2011-05-25 11:14:26 +00:00
Jamie Gritton
76ca6f88da Place hostnames and similar information fully under the prison system.
The system hostname is now stored in prison0, and the global variable
"hostname" has been removed, as has the hostname_mtx mutex.  Jails may
have their own host information, or they may inherit it from the
parent/system.  The proper way to read the hostname is via
getcredhostname(), which will copy either the hostname associated with
the passed cred, or the system hostname if you pass NULL.  The system
hostname can still be accessed directly (and without locking) at
prison0.pr_host, but that should be avoided where possible.

The "similar information" referred to is domainname, hostid, and
hostuuid, which have also become prison parameters and had their
associated global variables removed.

Approved by:	bz (mentor)
2009-05-29 21:27:12 +00:00
Ulf Lilleengen
c0b9797aa8 Import the gvinum work that have been done during and after Summer of Code 2007.
The work have been under testing and fixing since then, and it is mature enough
to be put into HEAD for further testing.

A lot have changed in this time, and here are the most important:
- Gvinum now uses one single workerthread instead of one thread for each
  volume and each plex. The reason for this is that the previous scheme was
  very complex, and was the cause of many of the bugs discovered in gvinum.
  Instead, gvinum now uses one worker thread with an event queue, quite
  similar to what used in gmirror.
- The rebuild/grow/initialize/parity check routines no longer runs in
  separate threads, but are run as regular I/O requests with special flags.
  This made it easier to support mounted growing and parity rebuild.
- Support for growing striped and raid5-plexes, meaning that one can extend the
  volumes for these plex types in addition to the concat type. Also works while
  the volume is mounted.
- Implementation of many of the missing commands from the old vinum:
  attach/detach, start (was partially implemented), stop (was partially
  implemented), concat, mirror, stripe, raid5 (shortcuts for creating volumes
  with one plex of these organizations).
- The parity check and rebuild no longer goes between userland/kernel, meaning
  that the gvinum command will not stay and wait forever for the rebuild to
  finish. You can instead watch the status with the list command.
- Many problems with gvinum have been reported since 5.x, and some has been hard
  to fix due to the complicated architecture. Hopefully, it should be more
  stable and better handle edge cases that previously made gvinum crash.
- Failed drives no longer disappears entirely, but now leave behind a dummy
  drive that makes sure the original state is not forgotten in case the system
  is rebooted between drive failures/swaps.
- Update manpage to reflect new commands and extend it with some examples.

Sponsored by:   Google Summer of Code 2007
Mentored by:    le
Tested by:      Rick C. Petty <rick-freebsd2008 -at- kiwi-computer.com>
2009-03-28 17:20:08 +00:00
Ulf Lilleengen
86b3c6f5bc - Import macros used in gmirror for printing gvinum debug messages and making
the output more standardized.
- Add a sysctl to set the verbosity of the debug messages.
- While there, fixup typos and wording in the messages.
2008-10-26 17:20:37 +00:00
Ulf Lilleengen
d4b28d5b0f - Remove unneeded macro since the config_length field in the header was changed
to 64 bit in the new format.
2008-10-02 09:35:47 +00:00
Ulf Lilleengen
46ceb66ad3 - Make gvinum header on-disk structure consistent on all platforms by storing
the gvinum header in fields of fixed size and in a big endian byte order
  rather than the size and byte order of the actual platform.

Note that the change is backwards compatible with the old gvinum configuration
format, but will save the configuration in the new format when the 'saveconfig'
command is executed.

Submitted by:	Rick C. Petty <rick-freebsd -at- kiwi-computer.com>
2008-10-01 14:50:36 +00:00
Bjoern A. Zeeb
603724d3ab Commit step 1 of the vimage project, (network stack)
virtualization work done by Marko Zec (zec@).

This is the first in a series of commits over the course
of the next few weeks.

Mark all uses of global variables to be virtualized
with a V_ prefix.
Use macros to map them back to their global names for
now, so this is a NOP change only.

We hope to have caught at least 85-90% of what is needed
so we do not invalidate a lot of outstanding patches again.

Obtained from:	//depot/projects/vimage-commit2/...
Reviewed by:	brooks, des, ed, mav, julian,
		jamie, kris, rwatson, zec, ...
		(various people I forgot, different versions)
		md5 (with a bit of help)
Sponsored by:	NLnet Foundation, The FreeBSD Foundation
X-MFC after:	never
V_Commit_Message_Reviewed_By:	more people than the patch
2008-08-17 23:27:27 +00:00
Robert Watson
4f7d1876d5 Introduce a new lock, hostname_mtx, and use it to synchronize access
to global hostname and domainname variables.  Where necessary, copy
to or from a stack-local buffer before performing copyin() or
copyout().  A few uses, such as in cd9660 and daemon_saver, remain
under-synchronized and will require further updates.

Correct a bug in which a failed copyin() of domainname would leave
domainname potentially corrupted.

MFC after:	3 weeks
2008-07-05 13:10:10 +00:00
Ulf Lilleengen
1cf9b83c6d - Fix a memory leak when re-discovering a gvinum configuration.
Approved by:	pjd (mentor)
MFC after:	1 week
2008-03-18 08:48:51 +00:00
Julian Elischer
3745c395ec Rename the kthread_xxx (e.g. kthread_create()) calls
to kproc_xxx as they actually make whole processes.
Thos makes way for us to add REAL kthread_create() and friends
that actually make theads. it turns out that most of these
calls actually end up being moved back to the thread version
when it's added. but we need to make this cosmetic change first.

I'd LOVE to do this rename in 7.0  so that we can eventually MFC the
new kthread_xxx() calls.
2007-10-20 23:23:23 +00:00
Lukas Ertl
d5817a5009 Get rid of the gv_bioq hack in most parts of the I/O path and
use the standard bioq structures.
2006-01-06 18:03:17 +00:00
Maxim Sobolev
b53a1cf306 Don't pass error value pointer to g_read_data(9) at all if we don't
have any use of it.

Suggested by:	pjd
2005-11-30 22:15:00 +00:00
Maxim Sobolev
8a4a44b5aa Check for g_read_data(9) errors properly:
o The only indication of error condition is NULL value returned by
  the function;

o value pointed to by error argument is undefined in the case when
  operation completes successfully.

Discussed with: phk
2005-11-30 19:24:51 +00:00
Lukas Ertl
e30534d50b Since we want a vinum geom created anytime the module loads, move
the geom creation to a seperate init function and ignore the tasting.

The config is now parsed only in the vinumdrive geom, which hopefully
fixes the problem, that the drive class tasted before the vinum class
had a chance, for good.

Also restore the behaviour that the module can be loaded at boot time
and on a running system.
2005-11-24 15:11:41 +00:00
Lukas Ertl
57335408d4 Finally bring in what was produced during Google SoC 2005:
Add functions to rename objects and to move a subdisk from one drive
to another.

Obtained from:  Chris Jones <chris.jones@ualberta.ca>
Sponsored by:   Google Summer of Code 2005
MFC in:         1 week
2005-11-19 20:25:18 +00:00
Lukas Ertl
df5175af0f Shuffle around the order in which the components are compiled.
This way, the VINUMDRIVE class is loaded before the VINUM class,
but since geom does the tasting for newly arrived classes
last-in-first-out, the VINUM class tastes first.

This removes the need to call gv_parse_config() in the drive
taste path.
2005-08-26 14:40:32 +00:00
Lukas Ertl
8cc5eb98ad Fix a stupid logic bug introduced in geom_vinum_drive.c rev 1.18:
When a drive is newly created, it's state is initially set to 'down',
so it won't allow saving the config to it (thus it will never know of
itself being created).  Work around this by adding a new flag, that's
also checked when saving the config to a drive.
2005-08-15 17:07:47 +00:00
Lukas Ertl
0164489c96 When a drive dies, don't call g_wither_geom() directly, but instead
post an event to the geom event queue that will take care of it,
letting outstanding bios finish, and closing the consumers.

Plus some cosmetic clean ups.
2005-05-17 16:38:30 +00:00
Lukas Ertl
cf01c54cda Remove test for zero sectorsize when tasting. This check doesn't
seem to be necessary anymore, and it prevents tasting a valid drive
when booting with geom_vinum already loaded, since SCSI disks set their
sectorsize not until first opening them.
2005-03-07 19:58:58 +00:00
Lukas Ertl
3608f72533 In case of drive errors, don't close the associated consumer and
detach it, but instead let the geom wither away.

Bump copyright year.
2005-02-17 16:08:36 +00:00
Lukas Ertl
f11c507c45 Although an object may already be known in the configuration, it's
worker thread may have been destroyed (e.g. during orphaning).

Make sure that objects get back their worker threads when they get a
new geom.
2005-01-19 14:08:16 +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
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
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
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
Lukas Ertl
ecffb8e64b Lock the topology before calling gv_parse_config, not afterwards. 2004-08-10 20:15:12 +00:00
Poul-Henning Kamp
5721c9c76a Tag all geom classes in the tree with a version number. 2004-08-08 07:57:53 +00:00
Lukas Ertl
3242376072 There's a chance that the VINUMDRIVE class tastes before the
VINUM class, so let the VINUMDRIVE class parse the on-disk
configuration, too.
2004-07-25 23:01:09 +00:00
Lukas Ertl
c291a77678 Use a temporary geom when tasting vinumdrives and lock the 'real'
vinumdrive geom with an exclusive bit.  This should fix the problem
when underlying partitions overlap (i.e. the 'a' partition is at
the same offset as the 'c' partition).

Ideas borrowed from pjd@, quite a bit of testing by
Matthias Schuendehuette <msch@snafu.de>.
2004-07-24 22:26:40 +00:00
Lukas Ertl
1b699be2e1 No need to free the softc, because it wasn't allocated. 2004-06-22 18:13:43 +00:00
Lukas Ertl
7f72de2d55 Clean up allocated ressources when destroying the main vinum geom. 2004-06-18 19:53:33 +00:00
Lukas Ertl
99b536d888 Handle dead disks in a somewhat sane way. 2004-06-16 14:41:04 +00:00
Lukas Ertl
a6facf72b1 Don't free a VINUMDRIVE softc when it's orphaned or spoiled. All
allocated ressouces should be ultimately freed in gv_destroy_geom()
(when unloading the module and not earlier), but I need to look at this
more closely.
2004-06-14 17:12:32 +00:00
Lukas Ertl
73679edcc7 Add a first version of a GEOMified vinum. 2004-06-12 21:16:10 +00:00