Commit Graph

22 Commits

Author SHA1 Message Date
Poul-Henning Kamp
19ebba326b s/struct dev_t */dev_t */ 2002-09-28 21:21:01 +00:00
Robert Watson
6742f32809 Introduce support for Mandatory Access Control and extensible
kernel access control.

Instrument devfs to support per-dirent MAC labels.  In particular,
invoke MAC framework when devfs directory entries are instantiated
due to make_dev() and related calls, and invoke the MAC framework
when vnodes are instantiated from these directory entries.  Implement
vop_setlabel() for devfs, which pushes the label update into the
devfs directory entry for semi-persistant store.  This permits the MAC
framework to assign labels to devices and directories as they are
instantiated, and export access control information via devfs vnodes.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-07-31 15:45:16 +00:00
Dima Dorfman
a1dc209638 Introduce the DEVFS "rule" subsystem. DEVFS rules permit the
administrator to define certain properties of new devfs nodes before
they become visible to the userland.  Both static (e.g., /dev/speaker)
and dynamic (e.g., /dev/bpf*, some removable devices) nodes are
supported.  Each DEVFS mount may have a different ruleset assigned to
it, permitting different policies to be implemented for things like
jails.

Approved by:	phk
2002-07-17 01:46:48 +00:00
Mike Smith
a7489fe56f Add a new sysinit SI_SUB_DEVFS. Devfs hooks into the kernel at SI_ORDER_FIRST,
and devices can be created anytime after that.

Print a warning if an atttempt is made to create a device too early.
2002-01-09 04:58:49 +00:00
Mike Smith
92fef27d97 Use a sysinit to initialise the devfs hooks in kern_conf.c rather than common
variables.

Reviewed by:	phk (in principle)
2002-01-09 01:00:20 +00:00
Poul-Henning Kamp
93432a92a4 Use vfs_timestamp() instead of getnanotime() directly.
Fix some modes on directories and symlinks.

Instructed by:	bde
2001-11-03 16:53:24 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Poul-Henning Kamp
3344c5a17e Create a general facility for making dev_t's depend on another
dev_t.  The dev_depends(dev_t, dev_t) function is for tying them
to each other.

When destroy_dev() is called on a dev_t, all dev_t's depending
on it will also be destroyed (depth first order).

Rewrite the make_dev_alias() to use this dependency facility.

kern/subr_disk.c:
Make the disk mini-layer use dependencies to make sure all
relevant dev_t's are removed when the disk disappears.

Make the disk mini-layer precreate some magic sub devices
which the disk/slice/label code expects to be there.

kern/subr_disklabel.c:
Remove some now unneeded variables.

kern/subr_diskmbr.c:
Remove some ancient, commented out code.

kern/subr_diskslice.c:
Minor cleanup.  Use name from dev_t instead of dsname()
2001-05-26 08:27:58 +00:00
Poul-Henning Kamp
ab9f3b292e Convert DEVFS from an "opt-in" to an "opt-out" option.
If for some reason DEVFS is undesired, the "NODEVFS" option is
needed now.

Pending any significant issues, DEVFS will be made mandatory in
-current on july 1st so that we can start reaping the full
benefits of having it.
2001-05-13 20:52:40 +00:00
Mark Murray
fb919e4d5a Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.

Sort sys/*.h includes where possible in affected files.

OK'ed by:	bde (with reservations)
2001-05-01 08:13:21 +00:00
Poul-Henning Kamp
4b1c62b3f2 At the point in time where most devices are created, we don't know what
time it is because boottime is not yet initialized.  Finagle the relevant
fields when we get the chance.
2001-02-02 22:54:41 +00:00
Poul-Henning Kamp
aadf265525 Fix two minor nits.
Existences revealed, but no details offered by: bp
2001-01-30 08:39:52 +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
2a0436783d staticize. 2000-12-08 15:07:24 +00:00
Poul-Henning Kamp
53ce36d17a Remove unneeded #include <sys/proc.h> lines. 2000-10-29 13:57:19 +00:00
Poul-Henning Kamp
8abea41d80 Don't hold an extra reference to vnodes. Devfs vnodes are sufficiently
cheap to setup that it doesn't really matter that we recycle device
vnodes at kleenex speed.

Implement first cut try at killing cloned devices when they are
not needed anymore.  For now only the bpf driver is involved in
this experiment.  Cloned devices can set the SI_CHEAPCLONE flag
which allows us to destroy_dev() it when the vcount() drops to zero
and the vnode is reclaimed.  For now it's a requirement that the
driver doesn't keep persistent state from close to (re)open.

Some whitespace changes.
2000-10-09 14:18:07 +00:00
Poul-Henning Kamp
93bcdfe270 Add refcounts to the "global" DEVFS inode slots, this allows us
to recycle inodes after a destroy_dev() but not until all mounts
have picked up the change.

Add support for an overflow table for DEVFS inodes.  The static
table defaults to 1024 inodes, if that fills, an overflow table
of 32k inodes is allocated.  Both numbers can be changed at
compile time, the size of the overflow table also with the
sysctl vfs.devfs.noverflow.

Use atomic instructions to barrier between make_dev()/destroy_dev()
and the mounts.

Add lockmgr() locking of directories for operations accessing or
modifying the directory TAILQs.

Various nitpicking here and there.
2000-09-06 11:26:43 +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
c32d0a1dcd Reorder vop's alphabetically.
Smarter use of devfs_allocv() (from bp@)
 Introduce devfs_find()
 ".." fixes to devfs_lookup (from bp@)
2000-08-27 14:46:36 +00:00
Poul-Henning Kamp
a481b90b82 Fix panic when removing open device (found by bp@)
Implement subdirs.
 Build the full "devicename" for cloning functions.
 Fix panic when deleted device goes away.
 Collaps devfs_dir and devfs_dirent structures.
 Add proper cloning to the /dev/fd* "device-"driver.
 Fix a bug in make_dev_alias() handling which made aliases appear
  multiple times.
 Use devfs_clone to implement getdiskbyname()
 Make specfs maintain the stat(2) timestamps per dev_t
2000-08-24 15:36:55 +00:00
Poul-Henning Kamp
fcc9b84ca5 Fix devfs_access() bug on directories.
Remove unused #includes.

Bug spotted by:	markm
2000-08-21 14:45:19 +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