Commit Graph

108 Commits

Author SHA1 Message Date
Ulf Lilleengen
b79cac0f92 - Fix the issue with read access count modification on RAID-5 plexes properly.
If the access counts were not increased and decreased in equal numbers by
  gvinum consumers, the read access count would be inconsistent with the write
  access count. Instead, modify the read access count with the write access
  count directly to prevent any inconsistencies.

Approved by:	re (kib)
2009-07-18 11:12:48 +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
d8d015cddc - Split up the BIO queue into a queue for new and one for completed requests.
This is necessary for two reasons:
  1) In order to avoid collisions with the use of a BIOs flags set by a consumer
     or a provider
  2) Because GV_BIO_DONE was used to mark a BIO as done, not enough flags was
     available, so the consumer flags of a BIO had to be misused in order to
     support enough flags. The new queue makes it possible to recycle the
     GV_BIO_DONE flag into GV_BIO_GROW.
  As a consequence, gvinum will now work with any other GEOM class under it or
  on top of it.

- Use bio_pflags for storing internal flags on downgoing BIOs, as the requests
  appear to come from a consumer of a gvinum volume. Use bio_cflags only for
  cloned BIOs.
- Move gv_post_bio to be used internally for maintenance requests.
- Remove some cases where flags where set without need.

PR:		kern/133604
2009-05-06 19:34:32 +00:00
Ulf Lilleengen
41944888fe - Fix a case where a RAID5 volume would think that it is supposed to grow a new
subdisk after a parity rebuild.
2009-05-06 19:18:19 +00:00
Ulf Lilleengen
11c4adc49e - Check if any plexes are doing internal maintenance before removing them. 2009-05-06 19:06:28 +00:00
Ulf Lilleengen
5a0fa8531c - Add forgotten KASSERT. 2009-05-06 18:37:32 +00:00
Ulf Lilleengen
1d8dfc60f4 - Fix a bug where the bio_data field of the wrong BIO is freed if an error
occurs when doing a RAID5 request.
2009-05-06 18:27:28 +00:00
Ulf Lilleengen
451b95f489 - GV_BIO_RETRY is not used, and it is actually impossible with more than 8
values for bio_cflags/bio_pflags.
2009-05-06 18:24:56 +00:00
Ulf Lilleengen
040272465d - Split the queue mutex into one for the event queue and one for the BIO queue,
as they do not really relate and to prepare for an additional queue to be
  covered by the BIO queue mutex.
- Implement wrappers for fetching the next element from the event queue as well
  as for putting a new element into the BIO queue.
2009-05-06 18:21:48 +00:00
Ulf Lilleengen
ad75dd77e0 - Make the gvinum softc invisible to userland, as it is not needed. 2009-05-04 17:30:20 +00:00
Ulf Lilleengen
697ab8be86 - Remove assertion of topology lock remaining from 7.x gvinum. It is not needed,
as the renaming only changes internal gvinum names and will not alter the geom
  topology.
- The topology lock was not held when calling g_wither_geom after renaming.
2009-04-18 16:36:27 +00:00
Ulf Lilleengen
1de45ea74d - Move out allocation part of different gvinum objects into its own routine and
make use of it in the gvinum userland code.
2009-04-10 08:50:14 +00:00
Ulf Lilleengen
bd9337ce80 - Add files that should have been added in r190507. 2009-03-28 21:06:59 +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
2155338ac1 - Fix an issue with access permissions to underlying disks used by a gvinum
plex. If the plex is a raid5 plex, and is being written to, parity data might
  have to be read from the underlying disks, requiring them to be opened for
  reading as well as writing.

MFC after:	1 week
2008-12-27 14:32:39 +00:00
Ulf Lilleengen
7e11b694f4 - Fix a potential NULL pointer reference. Note that this cannot happen in
practice, but it is a good programming practice nontheless and it allows the
  kernel to not depend on userland correctness.

Found with:   Coverity Prevent(tm)
CID:          655-659, 664-667
2008-11-25 19:13:58 +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
64d62b289e - Use the new gv_write_header function to write out the header when removing a
drive to make sure that the header is in the correct format.
2008-10-02 10:01:05 +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
Ulf Lilleengen
14e96b45e8 - When renaming a drive, also set the drive name in the gvinum header.
PR:		kern/125632
Approved by:	pjd (mentor)
MFC after:	3 days
2008-07-19 13:53:11 +00:00
Ulf Lilleengen
56af4c6141 - Fix a logic error when updating plex configuration.
Approved by:	pjd (mentor)
2008-07-11 16:46:29 +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
4e70f1decf - Recognize the 'volume' parameter when creating a plex.
PR:		kern/75632
Approved by:	pjd (mentor)
MFC after:	1 day
2008-05-22 10:27:03 +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
a2237c41fc -) Correct sdcount for a plex when removing or adding subdisks.
-) Set correct sizes for plexes and volumes a subdisk has been removed.

Submitted by:   Ulf Lilleengen <lulf_AT_freebsd.org>
2007-04-12 17:54:35 +00:00
Lukas Ertl
9e357b05da Avoid infinite loop if the device string given for a drive
only consists of "/".

Submitted by:  Ulf Lilleengen <lulf_AT_freebsd.org>
2007-04-12 17:40:44 +00:00
Warner Losh
1a3c917f9d while (0); -> while (0) in multi-line macros 2006-08-17 22:50:33 +00:00
Lukas Ertl
ff91880e5d Protect from creating striped and RAID5 plexes with unequally sized
subdisks.
2006-03-30 14:01:25 +00:00
Lukas Ertl
5c391fb60c Fix whitespace. 2006-03-23 20:01:13 +00:00
Lukas Ertl
7b5264faa1 Implement the 'resetconfig' command.
PR:            kern/94835
Submitted by:  Ulf Lilleengen <lulf@stud.ntnu.no>
2006-03-23 19:58:43 +00:00
Lukas Ertl
d9a7dc858a Catch the case when a subdisk has no provider or no consumer
attached to it.
2006-02-08 21:32:45 +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
8eb116b96e Whitespace. 2005-11-20 12:14:18 +00:00
Lukas Ertl
2e42895a97 Always declare variables at the start of the function.
Don't allocate potentially large variables on the stack.
Check strsep() return values when the string comes from userland.
Shorten variable names for lucidity's sake.

most of the stuff:
Pointed out by:    njl@
2005-11-20 12:12:31 +00:00
Lukas Ertl
47517eab34 Fix whitespace issue.
Pointed out by:   joel@
2005-11-20 10:40:06 +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
fcac1be89a Set the G_PF_WITHER flag on the subdisk provider that is about to
be destroyed.  That way the GEOM system handles all deallocations
and we don't have to do it ourselves.
2005-09-08 20:08:46 +00:00
Lukas Ertl
1f710312a2 Prevent that sync operations can be started when they are already
in progress, and be a bit more user friendly in terms of error
messages returned from the kernel.
2005-08-28 18:16:31 +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
fdb9eda84f Correct the check if a plex is accessible in case it is not up.
This makes degraded RAID5 plexes actually work.
2005-08-22 23:24:26 +00:00
Lukas Ertl
664a97517f Make it possible to remove stale, left-over subdisks. 2005-08-16 15:12:44 +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
7ad68986b8 *) Implement round-robin reads for multiplex volumes.
*) Plug a possible memory leak. [1]

[1] obtained from: pjd@.
2005-07-15 13:38:06 +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