Commit Graph

9 Commits

Author SHA1 Message Date
Poul-Henning Kamp
21144e3bf1 Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new
field in struct buf: b_iocmd.  The b_iocmd is enforced to have
exactly one bit set.

B_WRITE was bogusly defined as zero giving rise to obvious coding
mistakes.

Also eliminate the redundant struct buf flag B_CALL, it can just
as efficiently be done by comparing b_iodone to NULL.

Should you get a panic or drop into the debugger, complaining about
"b_iocmd", don't continue.  It is likely to write on your disk
where it should have been reading.

This change is a step in the direction towards a stackable BIO capability.

A lot of this patch were machine generated (Thanks to style(9) compliance!)

Vinum users:  Greg has not had time to test this yet, be careful.
2000-03-20 10:44:49 +00:00
Poul-Henning Kamp
66c161915b Initialize type correctly. 1999-12-01 10:20:21 +00:00
Poul-Henning Kamp
71e4fff823 Retire MFS_ROOT and MFS_ROOT_SIZE options from the MFS implementation.
Add MD_ROOT and MD_ROOT_SIZE options to the md driver.

Make the md driver handle MFS_ROOT and MFS_ROOT_SIZE options for compatibility.

Add md driver to GENERIC, PCCARD and LINT.

This is a cleanup which removes the need for some of the worse hacks in
MFS:  We really want to have a rootvnode but MFS on a preloaded image
doesn't really have one.  md is a true device, so it is less trouble.

This has been tested with make release, and if people remember to add
the "md" pseudo-device to their kernels, PicoBSD should be just fine
as well.  If people have no other use for MFS, it can be removed from
the kernel.
1999-11-26 20:08:44 +00:00
Poul-Henning Kamp
95f1a897f9 Teach the md driver to use preloaded files of type "md_image". 1999-11-20 22:43:27 +00:00
Poul-Henning Kamp
c23f21660c remove unused #include 1999-10-11 19:16:54 +00:00
Poul-Henning Kamp
d6a0e38a1b Remove five now unused fields from struct cdevsw. They should never
have been there in the first place.  A GENERIC kernel shrinks almost 1k.

Add a slightly different safetybelt under nostop for tty drivers.

Add some missing FreeBSD tags
1999-09-25 18:24:47 +00:00
Brian Feldman
27068b01f7 Fix includes (remove unnecessary ones, reorder necessary ones.)
Also, correct an %x to be %lx.

Reviewed by:	phk
1999-09-22 21:23:21 +00:00
Poul-Henning Kamp
33edfabe57 fix a buglet which jordan made me provoke :-) 1999-09-21 12:05:38 +00:00
Poul-Henning Kamp
00a6a3c65f Add an experimental Memory-Disk driver. This driver will allocate
memory with malloc(9) using a few tricks to save space on the way.
1999-09-21 11:00:49 +00:00