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42 Commits

Author SHA1 Message Date
kleink
d72a3b2da1 Leftover from last commit: require us to be initialized when a DIOCGDINFO 
ioctl(2) is issued; the uninitialized disklabel pointer might get dereferenced
otherwise.
 1997-06-26 16:28:34 +00:00
thorpej
4cea35eb42 In ccdioctl(), consolidate checks for "open for writes" and "initialized". 1997-06-26 04:25:50 +00:00
thorpej
e06bb29b00 Two changes to ccdsize(): 
- If the partition was previously open, don't do the open/close steps.
  (Sync with other disk drivers.)
- foosize()'s return value is in DEV_BSIZE units; adjust the size obtained
  from the disklabel accordingly.
 1997-06-23 23:59:53 +00:00
mycroft
8f8b0d91e5 Remove bogus use of splhigh(), and apparently unneeded bzero(). 1997-03-12 22:31:37 +00:00
thorpej
9a815ed696 A performance optimization, inspired by a conversation with Thor Simon: 
- Keep a freelist of component buffer headers, defaulting
	  to 8 headers per component (tunable with the CCDNBUF
	  kernel compile option).
	- When allocating a component buffer, try to pull a header
	  off the freelist first, falling back on MALLOC() if the
	  freelist is empty.  Use MALLOC() rather than malloc(),
	  because it will attempt to short-cut the allocation before
	  actually making a full-blown malloc() call.
	- Keep statistics on how many component buffer headers have
	  been allocated and how many of those allocations have
	  resulted in freelist misses.

With these changes, I observed measurable decreases in system and
wall clock time on operations on an 8G ccd, as well as a measurable
drop in the time spent in ccdbuffer() (measured with kernel profiling).
 1997-01-30 04:00:52 +00:00
thorpej
bb60822446 Fix OBOB in ccdopen() partition range check. 
From Klaus Klein <kleink@layla.inka.de>, PR #3161.
 1997-01-30 03:32:56 +00:00
thorpej
7770d7c428 Compute the componet number properly so that error reporting is somewhat 
meaningful.  Bug noticed by Marshall Midden <m4@nts.umn.edu>.
 1996-12-18 19:22:46 +00:00
christos
86373f8cf9 backout kprintf changes 1996-10-13 01:37:04 +00:00
christos
5d85fa8122 printf -> kprintf, sprintf -> ksprintf 1996-10-10 22:25:05 +00:00
thorpej
49c5d29ee0 Fix bogus return value in ccdopen(); it failed to indicate an error 
condition if:
	- ccd was not initialized
	- partition did not exist
 1996-05-05 04:21:14 +00:00
christos
cee6ac0ce3 remove sys/cpu.h 1996-04-22 01:26:39 +00:00
christos
e1930da21b Remove dependencies to dev_conf.h and the file itself. 1996-03-30 23:05:46 +00:00
mrg
2c329c900b %d -> %ld in a few places... 1996-03-24 01:26:57 +00:00
christos
d318abdbc4 prototypes for ccd audio and ncr5380 1996-03-07 15:00:07 +00:00
thorpej
ee8a2c002f Copyright assigned to The NetBSD Foundation. 1996-02-28 01:01:17 +00:00
thorpej
91bd533c48 Avoid deref'ing a bad pointer in ccdopen(). This could happen if 
any partition other than RAW_PART is opened before configuring the
ccd.  Bug pointed out by Matthew Green.
 1996-02-11 18:04:01 +00:00
hpeyerl
fb81581990 detatch this spelling mistake from this source file. 1996-02-10 22:27:22 +00:00
thorpej
b686e830b8 Fix typo, from Thorsten Frueauf <frueauf@ira.uka.de>. 1996-02-06 18:15:19 +00:00
thorpej
732dd94a83 Add experimental data mirroring support, derived from code written by 
Satoshi Asami and Nisha Talagala.  For details on using data mirroring,
see the ccd(4) manual page.
 1996-02-01 20:47:13 +00:00
thorpej
5b39541e48 New generic disk framework. Highlights: 
- New metrics handling.  Metrics are now kept in the new
	  `struct disk'.  Busy time is now stored as a timeval, and
	  transfer count in bytes.

	- Storage for disklabels is now dynamically allocated, so that
	  the size of the disk structure is not machine-dependent.

	- Several new functions for attaching and detaching disks, and
	  handling metrics calculation.

Old-style instrumentation is still supported in drivers that did it before.
However, old-style instrumentation is being deprecated, and will go away
once the userland utilities are updated for the new framework.

For usage and architectural details, see the forthcoming disk(9) manual
page.
 1996-01-07 22:01:38 +00:00
thorpej
7268bf552d When unconfiguring a ccd, only free as many interleave indices as 
were allocated, which may not be the same as the number of components
in the ccd.  From Don Lewis <gdonl@gv.ssi1.com>.  Fixes PR #1820.
 1995-12-08 19:13:26 +00:00
thorpej
664cb04670 Fix a race condition where if a process is asleep waiting on an 
exclusive lock of a ccd device while another process is unconfiguring
that same device, the first process would never awaken (unless interrupted).
 1995-11-06 19:58:01 +00:00
thorpej
f85819bc44 In ccdstart(), only translate the block number from partition-relative 
to absolute if part != RAW_PART.
 1995-11-03 02:35:54 +00:00
thorpej
89d4987e5d Fix bad pointer deref, memory leak, and geometry calculation, pointed 
out by Jochen Pohl in PR #1588.  Change the interleave index to an
array of ints rather than an array of chars to avoid losing in the event
one has more than 127 components.
 1995-10-12 21:28:32 +00:00
thorpej
a1bc374083 Batting 1.000: fix a potential panic situation in ccdioctl() that can occur 
if ccdinit() fails.
 1995-10-09 05:37:57 +00:00
thorpej
ab0109ad89 Fix up a couple of comments. 1995-10-09 05:21:09 +00:00
thorpej
4e3112d39b Add the partition offset to the block number in ccdstart() as opposed 
to ccdstrategy(), and do it in a way that doesn't corrupt the block number
for residuals.  (What was I _thinking_?!)
 1995-10-09 01:45:34 +00:00
thorpej
b8dcfbd303 Implement a simple locking mechanism and use it, for sanity's sake. 
In ccdopen(), don't update the disklabel if any partition is already open.
Prevents race bewteen ccdstrategy() and ccdgetdisklabel().
 1995-10-09 00:46:45 +00:00
thorpej
7e85a5a412 Fix misplaced #ifdef. 1995-09-06 04:15:59 +00:00
thorpej
0696b30519 Wrap dk stats stuff in `#ifdef WORKING_DISK_STATISTICS'. Takes care 
of PR #1388 until such time as dk stats works on all ports.  XXX !!
 1995-08-29 23:13:44 +00:00
thorpej
a2db2c1899 Fix typo, pointed out by cross@va.pubnix.com (Chris P. Ross). 1995-08-21 18:25:52 +00:00
thorpej
77d85de272 New version of ccd. Allows dynamic run-time configuration and 
unconfiguration and supports disklabels.
 1995-08-17 16:31:30 +00:00
mycroft
7263209ce6 Make each disk and tape driver define its own read and write functions. 
Deprecate rawread() and rawwrite() completely.  Remove d_strategy from cdevsw to
force the abstraction barrier.
 1995-07-04 07:15:28 +00:00
cgd
bc9de32349 make dump stubs consistent 1995-06-26 05:34:44 +00:00
cgd
f6589edbc7 spaces -> tab 1995-03-09 02:20:34 +00:00
cgd
a44a276543 from jason thorpe: add ccdclose(), make it work with the MI scsi code, 
and add knowledge of i386 disk device names (XXX).
 1995-03-02 06:40:38 +00:00
cgd
f694af6712 don't overload buffer structs; allocate and use a 'super-struct' instead. 1995-03-02 06:38:11 +00:00
cgd
6ac2bbfc35 be more careful with types, also pull in headers where necessary. 1994-10-30 21:43:03 +00:00
mycroft
06476a4e53 ccdevsw --> cdevsw 1994-08-14 07:41:08 +00:00
hpeyerl
3214723fcf These should have been the 4.4Lite versions. duh. 1994-07-02 06:03:47 +00:00
cgd
cf92afd66e New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD' 1994-06-29 06:29:24 +00:00
hpeyerl
6f9db1ee2d Concat disk driver moved from hp300/dev to here. 1994-06-24 14:11:02 +00:00