Commit Graph

90 Commits

Author SHA1 Message Date
Brian Somers
115867175a KASSERT that the minor number passed to make_dev() is valid. 2001-02-02 03:32:11 +00:00
Poul-Henning Kamp
1fd7b93f3f Convert a Debugger(3) to a panic(9) and a EINVAL.
Reminded by:	bde
2001-01-21 21:19:49 +00:00
David Malone
7cc0979fd6 Convert more malloc+bzero to malloc+M_ZERO.
Submitted by:	josh@zipperup.org
Submitted by:	Robert Drehmel <robd@gmx.net>
2000-12-08 21:51:06 +00:00
Poul-Henning Kamp
959b7375ed Staticize some malloc M_ instances. 2000-12-08 20:09:00 +00:00
John Baldwin
9842fc8dda Axe some unused variables. 2000-11-10 21:54:19 +00:00
Poul-Henning Kamp
a16d0eb2d7 Deprecate devsw->d_bmaj entirely.
This removes support for booting current kernels with very old bootblocks.

Device driver writers: Please remove initializations for the d_bmaj
field in your cdevsw{}.
2000-10-31 10:58:14 +00:00
Poul-Henning Kamp
fe4e324374 Allow all users to access the dev -> devname sysctl. 2000-10-29 19:50:06 +00:00
Poul-Henning Kamp
b0d17ba69e Rename lminor() to dev2unit(). This function gives a linear unit number
which hides the 'hole' in the minor bits.

Introduce unit2minor() to do the reverse operation.

Fix some some make_dev() calls which didn't use UID_* or GID_* macros.

Kill the v_hashchain alias macro, it hides the real relationship.

Introduce experimental SI_CHEAPCLONE flag set it on cloned bpfs.
2000-09-19 10:28:44 +00:00
Poul-Henning Kamp
5ef2707e6e revent multiple make_dev() calls on the same dev_t and similar bogosities.
A couple of new warnings may be emitted during boot if drivers DTWT.

Tested by:	George Cox <gjvc@gjvc.com>
2000-09-11 17:15:33 +00:00
Poul-Henning Kamp
8d25eb2c3a Add code to devname(3) so it can find the names of devices which
were not present when dev_mkdb(8) was run.

First the dev_mkdb(8) database is searched, this caters for non-DEVFS
cases where people have renamed a device.

If that fails we ask the kernel using sysctl kern.devname if the device
driver has put a name in the dev_t.  This covers DEVFS cloned devices.

If that also fails we format a string which isn't entirely useless.
2000-09-09 11:39:59 +00:00
Poul-Henning Kamp
db90128160 Avoid the modules madness I inadvertently introduced by making the
cloning infrastructure standard in kern_conf.  Modules are now
the same with or without devfs support.

If you need to detect if devfs is present, in modules or elsewhere,
check the integer variable "devfs_present".

This happily removes an ugly hack from kern/vfs_conf.c.

This forces a rename of the eventhandler and the standard clone
helper function.

Include <sys/eventhandler.h> in <sys/conf.h>: it's a helper #include
like <sys/queue.h>

Remove all #includes of opt_devfs.h they no longer matter.
2000-09-02 19:17:34 +00:00
Poul-Henning Kamp
3f54a085a6 Remove all traces of Julians DEVFS (incl from kern/subr_diskslice.c)
Remove old DEVFS support fields from dev_t.

  Make uid, gid & mode members of dev_t and set them in make_dev().

  Use correct uid, gid & mode in make_dev in disk minilayer.

  Add support for registering alias names for a dev_t using the
  new function make_dev_alias().  These will show up as symlinks
  in DEVFS.

  Use makedev() rather than make_dev() for MFSs magic devices to prevent
  DEVFS from noticing this abuse.

  Add a field for DEVFS inode number in dev_t.

  Add new DEVFS in fs/devfs.

  Add devfs cloning to:
        disk minilayer (ie: ad(4), sd(4), cd(4) etc etc)
        md(4), tun(4), bpf(4), fd(4)

  If DEVFS add -d flag to /sbin/inits args to make it mount devfs.

  Add commented out DEVFS to GENERIC
2000-08-20 21:34:39 +00:00
Jake Burkholder
e39756439c Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by:		msmith and others
2000-05-26 02:09:24 +00:00
Jake Burkholder
740a1973a6 Change the way that the queue(3) structures are declared; don't assume that
the type argument to *_HEAD and *_ENTRY is a struct.

Suggested by:	phk
Reviewed by:	phk
Approved by:	mdodd
2000-05-23 20:41:01 +00:00
Poul-Henning Kamp
192c06ea1b Change the "bdev-whiner" to whine when open is attempted and extend
the deadline a month.
2000-05-09 18:53:57 +00:00
Kris Kennaway
8c6ac5e5a5 Reword warning to make it clearer (I read it as "remove block devices created
before 2000-06-01" which is obviously not what was intended :-)
2000-03-25 21:10:20 +00:00
Poul-Henning Kamp
e004067750 Whine at users who still have block devices in /dev, give them until
june 1st to fix their system.
2000-03-21 19:25:56 +00:00
Boris Popov
8dc74b6288 Backout previous commit. It was a mistake. 2000-01-23 15:47:46 +00:00
Boris Popov
9e991dfa2f Replace non obvious number with SPECNAMELEN constant.
Reviewed by:	phk
2000-01-23 14:58:53 +00:00
Poul-Henning Kamp
fb01c24c11 Be more careful about NOUDEV and NODEV.
Submitted by:	bde
2000-01-04 12:51:50 +00:00
Poul-Henning Kamp
c464420c89 Report swapdevices as cdevs rather than bdevs.
Remove unused dev2budev() function.
1999-11-29 21:37:18 +00:00
Poul-Henning Kamp
38941f351c Remove the now unused chrtoblk() function. 1999-11-29 20:50:58 +00:00
Peter Wemm
900942ba53 Zap devsw_module_handler(). 1999-11-08 08:10:00 +00:00
Poul-Henning Kamp
44d1184e81 Rename remove_dev() to destroy_dev().
Nagged about by:        msmith
1999-11-08 07:44:01 +00:00
Poul-Henning Kamp
d53dedee55 Remove the devsw magic from DEV_MODULE() 1999-11-07 10:01:17 +00:00
Poul-Henning Kamp
662761a74b A little step further in the dev_t cleanups:
Refuse to register a bmajor if the D_DISK flag is not set in cdevsw.

A little bit of cleanup while here.
1999-10-04 11:42:41 +00:00
Bruce Evans
c32cc1493f Const'ify devtoname() and d_name. This exposes some errors (2 non-benign).
Handle negative minor numbers properly in devtoname().
1999-09-13 12:29:32 +00:00
Poul-Henning Kamp
d137accc89 Add dev_t freeing code. Controlled by sysctl debug.free_devt, default
is off.
1999-08-29 09:09:12 +00:00
Poul-Henning Kamp
a87b535090 Put a brief comment on a couple of #defines. 1999-08-28 19:21:36 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Poul-Henning Kamp
9dcbe2404a Convert DEVFS hooks in (most) drivers to make_dev().
Diskslice/label code not yet handled.

Vinum, i4b, alpha, pc98 not dealt with (left to respective Maintainers)

Add the correct hook for devfs to kern_conf.c

The net result of this excercise is that a lot less files depends on DEVFS,
and devtoname() gets more sensible output in many cases.

A few drivers had minor additional cleanups performed relating to cdevsw
registration.

A few drivers don't register a cdevsw{} anymore, but only use make_dev().
1999-08-23 20:59:21 +00:00
Julian Elischer
1744fcd082 First small steps at merging DEVFS and PHK's Dev_t stuff. 1999-08-20 20:25:00 +00:00
Bill Fumerola
b8e49f681b Welcome devtoname(), to most likely be used when printing information
about a dev_t.

printf("%x", dev) now becomes printf("%s", devtoname(dev)) because
printing actual information about the device is much more useful then
printing a pointer to an address that would never help the developer debug.

Submitted by:	phk, bde
1999-08-17 20:25:50 +00:00
Poul-Henning Kamp
9a27d57978 Introduce lminor(dev_t dev), which returns a linear minor number,
ie: hides the fact that the major number is stuck in the middle.
1999-08-15 09:32:47 +00:00
Poul-Henning Kamp
7dc5cd047f The bdevsw() and cdevsw() are now identical, so kill the former. 1999-08-13 10:29:38 +00:00
Poul-Henning Kamp
0ef1c82630 Decommision miscfs/specfs/specdev.h. Most of it goes into <sys/conf.h>,
a few lines into <sys/vnode.h>.

Add a few fields to struct specinfo, paving the way for the fun part.
1999-08-08 18:43:05 +00:00
Greg Lehey
32c0c324d5 cdevsw_remove: place correct value in bmaj2cmaj. This had caused
warnings of the following nature on reloading a kld:

  WARNING: "vinum" is usurping "console"'s bmaj

This only applies to cases where "console" is mentioned.

Broken-by:	  grog
1999-08-08 00:34:00 +00:00
Brian Feldman
57d86fc695 Fix a REALLY embarrassing mistake. Don't look; I warned you. 1999-07-20 21:51:12 +00:00
Brian Feldman
fb30b5bdaf Make a dev2budev() function, and use it. This refixes pstat (working, broken,
working, broken, working) and savecore (working, working, broken, working,
working).

Sorta Reviewed by:	phk
1999-07-20 21:29:13 +00:00
Poul-Henning Kamp
698bfad7f2 Now a dev_t is a pointer to struct specinfo which is shared by all specdev
vnodes referencing this device.

Details:
        cdevsw->d_parms has been removed, the specinfo is available
        now (== dev_t) and the driver should modify it directly
        when applicable, and the only driver doing so, does so:
        vn.c.  I am not sure the logic in checking for "<" was right
        before, and it looks even less so now.

        An intial pool of 50 struct specinfo are depleted during
        early boot, after that malloc had better work.  It is
        likely that fewer than 50 would do.

        Hashing is done from udev_t to dev_t with a prime number
        remainder hash, experiments show no better hash available
        for decent cost (MD5 is only marginally better)  The prime
        number used should not be close to a power of two, we use
        83 for now.

        Add new checkalias2() to get around the loss of info from
        dev2udev() in bdevvp();

        The aliased vnodes are hung on a list straight of the dev_t,
        and speclisth[SPECSZ] is unused.  The sharing of struct
        specinfo means that the v_specnext moves into the vnode
        which grows by 4 bytes.

        Don't use a VBLK dev_t which doesn't make sense in MFS, now
        we hang a dummy cdevsw on B/Cmaj 253 so that things look sane.

	Storage overhead from all of this is O(50k).

        Bump __FreeBSD_version to 400009

The next step will add the stuff needed so device-drivers can start to
hang things from struct specinfo
1999-07-20 09:47:55 +00:00
Poul-Henning Kamp
3de280c443 [click] Now all dev_t's in the kernel have their char device major.
Only know casualy of this is swapinfo/pstat which should be fixes
the right way:  Store the actual pathname in the kernel like mount
does.  [Volounteers sought for this task]

The road map from here is roughly:  expand struct specinfo into struct
based dev_t.  Add dev_t registration facilities for device drivers and
start to use them.
1999-07-19 09:37:59 +00:00
Poul-Henning Kamp
d21c632c4b Use 256 as magic in bmaj2cmaj[]. Treat BLK/CHR dev_t more correctly. 1999-07-17 19:57:25 +00:00
Poul-Henning Kamp
f008cfcc1a I have not one single time remembered the name of this function correctly
so obviously I gave it the wrong name.  s/umakedev/makeudev/g
1999-07-17 18:43:50 +00:00
Poul-Henning Kamp
03016f421b Remove cmaj and bmaj args from DEV_DRIVER_MODULE. 1999-07-04 14:58:56 +00:00
Poul-Henning Kamp
c31558b215 Warn about drivers which take over other drivers cdevsw entries, but still
grant them squatters right.
1999-07-03 08:22:30 +00:00
Doug Rabson
6d4ce7aa8c * Call cdevsw_remove from the MOD_UNLOAD event.
* Fix a couple of warnings while I'm here.
1999-06-26 11:39:27 +00:00
Greg Lehey
9a9eb2b92b Add function cdevsw_remove, the opposite of cdevsw_add: remove an
entry in cdevsw (and bdevsw if appropriate).

Reviewed-by: phk
1999-06-25 07:49:01 +00:00
Dmitrij Tejblum
4ea5ad99d5 || vs && confusion in cdevsw_add(). 1999-06-01 20:41:26 +00:00
Poul-Henning Kamp
6fcd8a7c93 Introduce the makebdev() function, it does the same as the makedev()
function for now, but that will change.
1999-06-01 18:56:26 +00:00
Poul-Henning Kamp
2447bec829 Simplify cdevsw registration.
The cdevsw_add() function now finds the major number(s) in the
struct cdevsw passed to it.  cdevsw_add_generic() is no longer
needed, cdevsw_add() does the same thing.

cdevsw_add() will print an message if the d_maj field looks bogus.

Remove nblkdev and nchrdev variables.  Most places they were used
bogusly.  Instead check a dev_t for validity by seeing if devsw()
or bdevsw() returns NULL.

Move bdevsw() and devsw() functions to kern/kern_conf.c

Bump __FreeBSD_version to 400006

This commit removes:
        72 bogus makedev() calls
        26 bogus SYSINIT functions

if_xe.c bogusly accessed cdevsw[], author/maintainer please fix.

I4b and vinum not changed.  Patches emailed to authors.  LINT
probably broken until they catch up.
1999-05-31 11:29:30 +00:00