src/sys/fs/devfs/devfs.h, branch release/5.3.0_cvs

This commit was manufactured by cvs2svn to create tag

2004-11-04T19:12:42+00:00

'RELENG_5_3_0_RELEASE'.

This commit was manufactured to restore the state of the 5.3-RELEASE image.

Do the dreaded s/dev_t/struct cdev */

2004-06-16T09:47:26+00:00

Bump __FreeBSD_version accordingly.

White-space align a struct definition.

2004-02-15T21:43:08+00:00

Move a SYSINIT to the file where it belongs.

Modify the MAC Framework so that instead of embedding a (struct label)

2003-11-12T03:14:31+00:00

in various kernel objects to represent security data, we embed a
(struct label *) pointer, which now references labels allocated using
a UMA zone (mac_label.c).  This allows the size and shape of struct
label to be varied without changing the size and shape of these kernel
objects, which become part of the frozen ABI with 5-STABLE.  This opens
the door for boot-time selection of the number of label slots, and hence
changes to the bound on the number of simultaneous labeled policies
at boot-time instead of compile-time.  This also makes it easier to
embed label references in new objects as required for locking/caching
with fine-grained network stack locking, such as inpcb structures.

This change also moves us further in the direction of hiding the
structure of kernel objects from MAC policy modules, not to mention
dramatically reducing the number of '&' symbols appearing in both the
MAC Framework and MAC policy modules, and improving readability.

While this results in minimal performance change with MAC enabled, it
will observably shrink the size of a number of critical kernel data
structures for the !MAC case, and should have a small (but measurable)
performance benefit (i.e., struct vnode, struct socket) do to memory
conservation and reduced cost of zeroing memory.

NOTE: Users of MAC must recompile their kernel and all MAC modules as a
result of this change.  Because this is an API change, third party
MAC modules will also need to be updated to make less use of the '&'
symbol.

Suggestions from:	bmilekic
Obtained from:		TrustedBSD Project
Sponsored by:		DARPA, Network Associates Laboratories

Remove dm_root entry from struct devfs_mount. It's never set, and is

2002-12-09T03:44:28+00:00

unused.  Replace it with a dm_mount back-pointer to the struct mount
that the devfs_mount is associated with.  Export that pointer to MAC
Framework entry points, where all current policies don't use the
pointer.  This permits the SEBSD port of SELinux's FLASK/TE to compile
out-of-the-box on 5.0-CURRENT with full file system labeling support.

Approved by:	re (murray)
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories

Fix comments and one resulting code confusion about the type of the

2002-10-16T08:04:11+00:00

"command" argument to VOP_IOCTL.

Spotted by:	FlexeLint.

A better solution to avoiding variable sized structs in DEVFS.

2002-10-16T07:51:18+00:00

#include "opt_devfs.h" to protect against variable sized structures.

2002-10-16T07:16:47+00:00

Spotted by:	FlexeLint

Move the vop-vector declaration into devfs_vnops.c where it belongs.

2002-10-01T10:08:08+00:00

Introduce support for Mandatory Access Control and extensible

2002-07-30T23:12:37+00:00

kernel access control.

Label devfs directory entries, permitting labels to be maintained
on device nodes in devfs instances persistently despite vnode
recycling.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs