Commit Graph

79 Commits

Author SHA1 Message Date
Poul-Henning Kamp
bfbb9ce670 Divorce "dev_t" from the "major|minor" bitmap, which is now called
udev_t in the kernel but still called dev_t in userland.

Provide functions to manipulate both types:
        major()         umajor()
        minor()         uminor()
        makedev()       umakedev()
        dev2udev()      udev2dev()

For now they're functions, they will become in-line functions
after one of the next two steps in this process.

Return major/minor/makedev to macro-hood for userland.

Register a name in cdevsw[] for the "filedescriptor" driver.

In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.

In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits.  This will essentially
replace the current "alias" check code (same buck, bigger bang).

A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference.  If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.

Without DEVT_FASCIST I belive this patch is a no-op.

Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.

Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00
Poul-Henning Kamp
46eede0058 Continue where Julian left off in July 1998:
Virtualize bdevsw[] from cdevsw.  bdevsw() is now an (inline)
        function.

        Join CDEV_MODULE and BDEV_MODULE to DEV_MODULE (please pay attention
        to the order of the cmaj/bmaj arguments!)

        Join CDEV_DRIVER_MODULE and BDEV_DRIVER_MODULE to DEV_DRIVER_MODULE
        (ditto!)

(Next step will be to convert all bdev dev_t's to cdev dev_t's
before they get to do any damage^H^H^H^H^H^Hwork in the kernel.)
1999-05-07 10:11:40 +00:00
Poul-Henning Kamp
c48d17750f Introduce two functions: physread() and physwrite() and use these directly
in *devsw[] rather than the 46 local copies of the same functions.

(grog will do the same for vinum when he has time)
1999-05-07 07:03:47 +00:00
Poul-Henning Kamp
f711d546d2 Suser() simplification:
1:
  s/suser/suser_xxx/

2:
  Add new function: suser(struct proc *), prototyped in <sys/proc.h>.

3:
  s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/

The remaining suser_xxx() calls will be scrutinized and dealt with
later.

There may be some unneeded #include <sys/cred.h>, but they are left
as an exercise for Bruce.

More changes to the suser() API will come along with the "jail" code.
1999-04-27 11:18:52 +00:00
Julian Elischer
a5296b05b4 Submitted by: Matt Dillon <dillon@freebsd.org>
The old VN device broke in -4.x when the definition of B_PAGING
changed. This patch fixes this plus implements additional capabilities.
The new VN device can be backed by a file ( as per normal ), or it can
be directly backed by swap.

Due to dependencies in VM include files  (on opt_xxx options) the new
vn device cannot be a module yet. This will be fixed in a later commit.
This commit delimitted by tags {PRE,POST}_MATT_VNDEV
1999-03-14 09:20:01 +00:00
Matthew Dillon
06fd697d15 The alternate B_PAGING path for vnstrategy() is used for VM faults
as well as swap I/O now.  This path failed to properly set bp->b_resid
    on I/O completion.
1999-02-01 08:36:02 +00:00
Peter Wemm
d2b5b9779e Oops, got my #ifdef's mixed up. Fix an unused variable warning. 1999-01-23 00:28:56 +00:00
Peter Wemm
b453f58fcc Convert vn.c into a module (loadable and static). 1999-01-21 17:17:02 +00:00
Søren Schmidt
d024c95599 Remove the SLICE code.
This clearly needs alot more thought, and we dont need this to hunt
us down in 3.0-RELEASE.
1998-09-14 19:56:42 +00:00
Søren Schmidt
8b90e70e77 Enable the vn device under DEVFS without SLICE.
This was apparently missed when all the #ifdef SLICE gunk was put in.
1998-09-12 18:46:06 +00:00
Poul-Henning Kamp
be18fc123b remove bdevsw arg from dsopen();
Forgotten by:	julian
Reviewed by:	bde
1998-08-23 20:16:35 +00:00
Søren Schmidt
e620a1cbed Make struct buf->b_offset reflect the real byte offset which got
in via the uio struct. This enables device drivers to use != DEV_BSIZE
blocking on devices with wierd sector/block sizes (ie CDROM's).
1998-08-19 10:50:32 +00:00
Bruce Evans
34e9dea435 Added a flags arg to dsopen() and updated drivers. The DSO_ONESLICE
and DSO_NOLABELS flags prevent searching for slices and labels
respectively.  Current drivers don't set these flags.  When
DSO_NOLABELS is set, the in-core label for the whole disk is cloned
to create an in-core label for each slice.  This gives the correct
result (a good in-core label for the compatibility slice) if
DSO_ONESLICE is set or only one slice is found, but usually gives
broken labels otherwise, so DSO_ONESLICE should be set if DSO_NOLABELS
is set.
1998-07-30 15:16:06 +00:00
Julian Elischer
ad27f8d9a5 SLICE probing becomes asynchronous. It can now be triggered by
interupt level events. This needs a lot of cleanup, but has been working
here for a month or two.. originally needed for CAM integration
but that hasn't happenned yet. The probing  state machines for each
handler should be replaced by a more generic state-service. It's
still quite messy in there..
1998-07-13 08:23:05 +00:00
Bruce Evans
ac1e407b32 Fixed printf format errors. 1998-07-11 07:46:16 +00:00
Julian Elischer
f7ea2f55d1 There is no such thing any more as "struct bdevsw".
There is only cdevsw (which should be renamed in a later edit to deventry
or something). cdevsw contains the union of what were in both bdevsw an
cdevsw entries.  The bdevsw[] table stiff exists and is a second pointer
to the cdevsw entry of the device. it's major is in d_bmaj rather than
d_maj. some cleanup still to happen (e.g. dsopen now gets two pointers
to the same cdevsw struct instead of one to a bdevsw and one to a cdevsw).

rawread()/rawwrite() went away as part of this though it's not strictly
the same  patch, just that it involves all the same lines in the drivers.

cdroms no longer have write() entries (they did have rawwrite (?)).
tapes no longer have support for bdev operations.

Reviewed by: Eivind Eklund and Mike Smith
	Changes suggested by eivind.
1998-07-04 22:30:26 +00:00
Julian Elischer
fd5d1124e2 VOP_STRATEGY grows an (struct vnode *) argument
as the value in b_vp is often not really what you want.
(and needs to be frobbed). more cleanups will follow this.
Reviewed by: Bruce Evans <bde@freebsd.org>
1998-07-04 20:45:42 +00:00
Julian Elischer
ad12aad64b Don't use a struct buf (malloc'd) without first initialising all the fields
to some known value!
(probable cause of soft updates exploding with vn devices)
1998-07-04 00:27:48 +00:00
Doug Rabson
d287aa098c Fix another DEVFS/SLICE ioctl. 1998-06-07 20:10:53 +00:00
Doug Rabson
ecbb00a262 This commit fixes various 64bit portability problems required for
FreeBSD/alpha.  The most significant item is to change the command
argument to ioctl functions from int to u_long.  This change brings us
inline with various other BSD versions.  Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.
1998-06-07 17:13:14 +00:00
Julian Elischer
7f2f1b784e Add dump support to the DEVFS/slice code.
now we can actually catch our crashes :-)

Submitted by: Luoqi Chen <luoqi@chen.ml.org> (the man who's everywhere)
1998-05-06 22:14:48 +00:00
Julian Elischer
1667f2b3e5 slice_device.c: permissions changes for SLICE devices
vn.c:		change time of SYSINIT scheduling.
wd.c		don't revert to fully closed state. ( may require more)
all in SLICE mode only.
1998-04-24 07:54:00 +00:00
Julian Elischer
26d3bf5f1b close() is no longer a SLICE method.
Close is simply an open with no-read and no-write once internal to SLICE
(it still exports a close to the rest of the kernel)
1998-04-22 10:25:27 +00:00
Julian Elischer
3e425b968d Add changes and code to implement a functional DEVFS.
This code will be turned on with the TWO options
DEVFS and SLICE. (see LINT)
Two labels PRE_DEVFS_SLICE and POST_DEVFS_SLICE will deliniate these changes.

/dev will be automatically mounted by init (thanks phk)
on bootup. See /sys/dev/slice/slice.4 for more info.
All code should act the same without these options enabled.

Mike Smith, Poul Henning Kamp, Soeren, and a few dozen others

This code does not support the following:
bad144 handling.
Persistance. (My head is still hurting from the last time we discussed this)
ATAPI flopies are not handled by the SLICE code yet.

When this code is running, all major numbers are arbitrary and COULD
be dynamically assigned. (this is not done, for POLA only)
Minor numbers for disk slices ARE arbitray and dynamically assigned.
1998-04-19 23:32:49 +00:00
Bruce Evans
b9cecfcd53 Removed unused debugging variables and macros.
Don't depend on "implicit int" or bloat the data section in the
declaration of vn_devsw_installed.
1998-02-20 13:27:36 +00:00
Eivind Eklund
303b270b0a Staticize. 1998-02-09 06:11:36 +00:00
Eivind Eklund
7b778b5e61 Make all file-system (MFS, FFS, NFS, LFS, DEVFS) related option new-style.
This introduce an xxxFS_BOOT for each of the rootable filesystems.
(Presently not required, but encouraged to allow a smooth move of option *FS
to opt_dontuse.h later.)

LFS is temporarily disabled, and will be re-enabled tomorrow.
1998-01-24 02:54:56 +00:00
Bruce Evans
df1c78063c Use ENOIOCTL instead of -1 (= ERESTART) for diskslice ioctls that are
not handled at a particular level.
1997-12-06 14:27:56 +00:00
KATO Takenori
9cf7c6b0e5 Merge from RELENG_2_2. Bandaid for 'lockmgr panic' on the VN device. 1997-10-21 09:51:47 +00:00
KATO Takenori
81bca6ddae Clustered read and write are switched at mount-option level.
1. Clustered I/O is switched by the MNT_NOCLUSTERR and MNT_NOCLUSTERW
   bits of the mnt_flag.  The sysctl variables, vfs.foo.doclusterread
   and vfs.foo.doclusterwrite are deleted.  Only mount option can
   control clustered I/O from userland.
2. When foofs_mount mounts block device, foofs_mount checks D_CLUSTERR
   and D_CLUSTERW bits of the d_flags member in the block device switch
   table.  If D_NOCLUSTERR / D_NOCLUSTERW are set, MNT_NOCLUSTERR /
   MNT_NOCLUSTERW bits will be set.  In this case, MNT_NOCLUSTERR and
   MNT_NOCLUSTERW cannot be cleared from userland.
3. Vnode driver disables both clustered read and write.
4. Union filesystem disables clutered write.

Reviewed by:	bde
1997-09-27 13:40:20 +00:00
KATO Takenori
fb35546309 Fixed locking violation of vnode operation. VOP_READ, VOP_WRITE and
VOP_BMAP require locked vnode, and they will keep lock on exit.
1997-08-14 13:44:19 +00:00
Bruce Evans
958aaa7ef3 Removed unused #includes. 1997-06-14 13:56:12 +00:00
Doug Rabson
1c1284da73 Add D_DISK flag to vn_bdevsw. 1997-04-30 11:16:25 +00:00
Bruce Evans
fce002fdef Don't include <sys/ioctl.h> in the kernel. Stage 1: don't include
it when it is not used.  In most cases, the reasons for including it
went away when the special ioctl headers became self-sufficient.
1997-03-24 11:25:10 +00:00
Bruce Evans
3ac4d1ef0c Don't #include <sys/fcntl.h> in <sys/file.h> if KERNEL is defined.
Fixed everything that depended on getting fcntl.h stuff from the wrong
place.  Most things don't depend on file.h stuff at all.
1997-03-23 03:37:54 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
John Dyson
996c772f58 This is the kernel Lite/2 commit. There are some requisite userland
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.

The system boots and can mount UFS filesystems.

Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
		Mount_std mounts will not work until the getfsent
		library routine is changed.

Reviewed by:	various people
Submitted by:	Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Bruce Evans
2df511e27c Call bdevsw_add_generic() later so that there is no chance of returning
with an inconsistent state.  I think the return actually "can't happen".

Cleaned up style of recent changes.

I only fiddled with this because of bugs in recent changes.
1996-08-28 17:45:08 +00:00
Julian Elischer
e0d898b48e Some cleanups to the callout lists recently added.
note that at_shutdown has a new parameter to indicate When
during a shutdown the callout should be made. also
add a RB_POWEROFF flag to reboot "howto" parameter..
tells the reboot code in our at_shutdown module to turn off the UPS
and kill the power. bound to be useful eventually on laptops
1996-08-22 03:50:33 +00:00
Julian Elischer
554c43cbee oops apparently this wasn't in my test compile, becasue it didn't 1996-08-19 21:06:39 +00:00
Julian Elischer
269fb9d764 Collect all the functioons concerned with rebooting into one place
also add the at_shutdown callout list, and change the one user of
the present (broken) method (the vn driver) to use the new scheme.
1996-08-19 20:07:07 +00:00
Poul-Henning Kamp
cba8a5ddd3 Make a "DWIM" function for adding [bc]devsw entries for bdev drivers.
Saves about 280 butes of source per driver, 56 bytes in object size
and another 56 bytes moves from data to bss.

No functional change intended nor expected.

GENERIC should be about one k smaller now :-)
1996-07-23 21:52:43 +00:00
Bruce Evans
f953dd01c8 Removed an unused devfs variable again.
Added $Id$.
1996-03-28 15:25:43 +00:00
Marc G. Fournier
14689d6f4f Reviewed by: julian@freebsd.org 1996-03-28 14:26:46 +00:00
Bruce Evans
6ae323519c Fixed group of disk devices (was wheel or games, now operator).
Added scsi control devices.

Converted almost everything that I changed to use devfs_add_devswf()
and verbose id macros.

st.c:
Renamed enrst* to erst* since that's what the current name is (enrst
seems to be an old name).
1996-03-27 18:50:10 +00:00
Poul-Henning Kamp
b71daf5456 Always dsgone() slices when we leave. 1996-03-17 20:33:02 +00:00
Bruce Evans
c8f2fe8db8 First attempt at creating devfs entries for sliced devices. Doesn't
quite work yet, so the heart of it is disabled.

Added bdev and cdev args to dsopen().

drivers:
Fixed device names, links, minor numbers and modes.

wd.c:
Started actually supporting devfs.

diskslice.h:
Added devfs tokens to structs (currently 576 of them per disk! :-().

subr_diskslice.c:
Create devfs entries in dsopen() and (unsuccessfully) attempt to make
them go away at the right times.  DEVFS is #undefed at the start so
that this shouldn't cause problems.
1996-01-27 04:18:15 +00:00
Bruce Evans
337def8963 Fixed an overflowing multiplication in vnstrategy() by replacing it with
the standard macro dbtob().  The non-B_PAGING case now works well enough
to run newfs on a 32GB virtual drive.

Fixed numerous bogus variable types and one overflowing multiplication
in the B_PAGING case of vnstrategy().  Swapping to virtual drives larger
than 2GB might work now.
1996-01-14 20:32:14 +00:00
Poul-Henning Kamp
ba43d44d3a Staticize. 1995-12-09 20:34:16 +00:00