Rename mac_check_socket_receive() to mac_check_socket_deliver() so that
we can use the names _receive() and _send() for the receive() and send()
checks. Rename related constants, policy implementati

Rename mac_check_socket_receive() to mac_check_socket_deliver() so that
we can use the names _receive() and _send() for the receive() and send()
checks. Rename related constants, policy implementations, etc.

PR:
Submitted by:
Reviewed by:
Approved by:
Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs
MFC after:

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Sync to trustedbsd_mac tree: default to sigsegv rather than copy-on-write
during a label change resulting in an mmap removal. This is "fail stop"
behavior, which is preferred, although it offers sli

Sync to trustedbsd_mac tree: default to sigsegv rather than copy-on-write
during a label change resulting in an mmap removal. This is "fail stop"
behavior, which is preferred, although it offers slightly less
transparency.

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

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Declare a module service "kernel_mac_support" when MAC support is
enabled and the kernel provides the MAC registration and entry point
service. Declare a dependency on that module service for any
MA

Declare a module service "kernel_mac_support" when MAC support is
enabled and the kernel provides the MAC registration and entry point
service. Declare a dependency on that module service for any
MAC module registered using mac_policy.h. For now, hard code the
version as 1, but once we've come up with a versioning policy, we'll
move to a #define of some sort. In the mean time, this will prevent
loading a MAC module when 'options MAC' isn't present, which (due to
a bug in the kernel linker) can result if the MAC module is preloaded
via loader.conf.

This particular evil recommended by: peter
Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI LAbs

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- Replace v_flag with v_iflag and v_vflag
- v_vflag is protected by the vnode lock and is used when synchronization
with VOP calls is needed.
- v_iflag is protected by interlock and is used for

- Replace v_flag with v_iflag and v_vflag
- v_vflag is protected by the vnode lock and is used when synchronization
with VOP calls is needed.
- v_iflag is protected by interlock and is used for dealing with vnode
management issues. These flags include X/O LOCK, FREE, DOOMED, etc.
- All accesses to v_iflag and v_vflag have either been locked or marked with
mp_fixme's.
- Many ASSERT_VOP_LOCKED calls have been added where the locking was not
clear.
- Many functions in vfs_subr.c were restructured to provide for stronger
locking.

Idea stolen from: BSD/OS

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Include file cleanup; mac.h and malloc.h at one point had ordering
relationship requirements, and no longer do.

Reminded by: bde

Begin committing support for Mandatory Access Control and extensible
kernel access control. The MAC framework permits loadable kernel
modules to link to the kernel at compile-time, boot-time, or run

Begin committing support for Mandatory Access Control and extensible
kernel access control. The MAC framework permits loadable kernel
modules to link to the kernel at compile-time, boot-time, or run-time,
and augment the system security policy. This commit includes the
initial kernel implementation, although the interface with the userland
components of the oeprating system is still under work, and not all
kernel subsystems are supported. Later in this commit sequence,
documentation of which kernel subsystems will not work correctly with
a kernel compiled with MAC support will be added.

kern_mac.c contains the body of the MAC framework. Kernel and
user APIs defined in mac.h are implemented here, providing a front end
to loaded security modules. This code implements a module registration
service, state (label) management, security configuration and policy
composition.

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

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Stubs for the TrustedBSD MAC system calls to permit TrustedBSD MAC
userland code to operate on kernel's from the main tree. Not much
in this file yet.

Obtained from: TrustedBSD Project
Sponsored by

Stubs for the TrustedBSD MAC system calls to permit TrustedBSD MAC
userland code to operate on kernel's from the main tree. Not much
in this file yet.

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

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Merge from HEAD

Rename MAC Framework-internal macros used to invoke policy entry points:

MAC_BOOLEAN -> MAC_POLICY_BOOLEAN
MAC_BOOLEAN_NOSLEEP -> MAC_POLICY_BOOLEANN_NOSLEEP
MAC_CHECK

Rename MAC Framework-internal macros used to invoke policy entry points:

MAC_BOOLEAN -> MAC_POLICY_BOOLEAN
MAC_BOOLEAN_NOSLEEP -> MAC_POLICY_BOOLEANN_NOSLEEP
MAC_CHECK -> MAC_POLICY_CHECK
MAC_CHECK_NOSLEEP -> MAC_POLICY_CHECK_NOSLEEP
MAC_EXTERNALIZE -> MAC_POLICY_EXTERNALIZE
MAC_GRANT -> MAC_POLICY_GRANT
MAC_GRANT_NOSLEEP -> MAC_POLICY_GRANT_NOSLEEP
MAC_INTERNALIZE -> MAC_POLICY_INTERNALIZE
MAC_PERFORM -> MAC_POLICY_PERFORM_CHECK
MAC_PERFORM_NOSLEEP -> MAC_POLICY_PERFORM_NOSLEEP

This frees up those macro names for use in wrapping calls into the MAC
Framework from the remainder of the kernel.

Obtained from: TrustedBSD Project

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- Merge from HEAD

Rework MAC Framework synchronization in a number of ways in order to
improve performance:

- Eliminate custom reference count and condition variable to monitor
threads entering the framework, as th

Rework MAC Framework synchronization in a number of ways in order to
improve performance:

- Eliminate custom reference count and condition variable to monitor
threads entering the framework, as this had both significant overhead
and behaved badly in the face of contention.

- Replace reference count with two locks: an rwlock and an sx lock,
which will be read-acquired by threads entering the framework
depending on whether a give policy entry point is permitted to sleep
or not.

- Replace previous mutex locking of the reference count for exclusive
access with write acquiring of both the policy list sx and rw locks,
which occurs only when policies are attached or detached.

- Do a lockless read of the dynamic policy list head before acquiring
any locks in order to reduce overhead when no dynamic policies are
loaded; this a race we can afford to lose.

- For every policy entry point invocation, decide whether sleeping is
permitted, and if not, use a _NOSLEEP() variant of the composition
macros, which will use the rwlock instead of the sxlock. In some
cases, we decide which to use based on allocation flags passed to the
MAC Framework entry point.

As with the move to rwlocks/rmlocks in pfil, this may trigger witness
warnings, but these should (generally) be false positives as all
acquisition of the locks is for read with two very narrow exceptions
for policy load/unload, and those code blocks should never acquire
other locks.

Sponsored by: Google, Inc.
Obtained from: TrustedBSD Project
Discussed with: csjp (idea, not specific patch)

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Update the projects tree to a newer FreeBSD current.

Remove 'uio' argument from MAC Framework and MAC policy entry points for
extended attribute get/set; in the case of get an uninitialized user
buffer was passed before the EA was retrieved, making it

Remove 'uio' argument from MAC Framework and MAC policy entry points for
extended attribute get/set; in the case of get an uninitialized user
buffer was passed before the EA was retrieved, making it of relatively
little use; the latter was simply unused by any policies.

Obtained from: TrustedBSD Project
Sponsored by: Google, Inc.

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Add static DTrace probes for MAC Framework access control checks and
privilege grants so that dtrace can be more easily used to monitor
the security decisions being generated by the MAC Framework fol

Add static DTrace probes for MAC Framework access control checks and
privilege grants so that dtrace can be more easily used to monitor
the security decisions being generated by the MAC Framework following
policy invocation.

Successful access control checks will be reported by:

mac_framework:kernel:<entrypoint>:mac_check_ok

Failed access control checks will be reported by:

mac_framework:kernel:<entrypoint>:mac_check_err

Successful privilege grants will be reported by:

mac_framework:kernel:priv_grant:mac_grant_ok

Failed privilege grants will be reported by:

mac_framework:kernel:priv_grant:mac_grant_err

In all cases, the return value (always 0 for _ok, otherwise an errno
for _err) will be reported via arg0 on the probe, and subsequent
arguments will hold entrypoint-specific data, in a style similar to
privilege tracing.

Obtained from: TrustedBSD Project
Sponsored by: Google, Inc.

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Introduce accmode_t. This is required for NFSv4 ACLs - it will be neccessary
to add more V* constants, and the variables changed by this patch were often
being assigned to mode_t variables, which is

Introduce accmode_t. This is required for NFSv4 ACLs - it will be neccessary
to add more V* constants, and the variables changed by this patch were often
being assigned to mode_t variables, which is 16 bit.

Approved by: rwatson (mentor)

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Introduce two related changes to the TrustedBSD MAC Framework:

(1) Abstract interpreter vnode labeling in execve(2) and mac_execve(2)
so that the general exec code isn't aware of the details of

Introduce two related changes to the TrustedBSD MAC Framework:

(1) Abstract interpreter vnode labeling in execve(2) and mac_execve(2)
so that the general exec code isn't aware of the details of
allocating, copying, and freeing labels, rather, simply passes in
a void pointer to start and stop functions that will be used by
the framework. This change will be MFC'd.

(2) Introduce a new flags field to the MAC_POLICY_SET(9) interface
allowing policies to declare which types of objects require label
allocation, initialization, and destruction, and define a set of
flags covering various supported object types (MPC_OBJECT_PROC,
MPC_OBJECT_VNODE, MPC_OBJECT_INPCB, ...). This change reduces the
overhead of compiling the MAC Framework into the kernel if policies
aren't loaded, or if policies require labels on only a small number
or even no object types. Each time a policy is loaded or unloaded,
we recalculate a mask of labeled object types across all policies
present in the system. Eliminate MAC_ALWAYS_LABEL_MBUF option as it
is no longer required.

MFC after: 1 week ((1) only)
Reviewed by: csjp
Obtained from: TrustedBSD Project
Sponsored by: Apple, Inc.

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Rename mac_associate_nfsd_label() to mac_proc_associate_nfsd(), and move
from mac_vfs.c to mac_process.c to join other functions that setup up
process labels for specific purposes. Unlike the two pr

Rename mac_associate_nfsd_label() to mac_proc_associate_nfsd(), and move
from mac_vfs.c to mac_process.c to join other functions that setup up
process labels for specific purposes. Unlike the two proc create calls,
this call is intended to run after creation when a process registers as
the NFS daemon, so remains an _associate_ call..

Obtained from: TrustedBSD Project

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Further MAC Framework cleanup: normalize some local variable names and
clean up some comments.

Obtained from: TrustedBSD Project

Merge first in a series of TrustedBSD MAC Framework KPI changes
from Mac OS X Leopard--rationalize naming for entry points to
the following general forms:

mac_<object>_<method/action>
mac_<objec

Merge first in a series of TrustedBSD MAC Framework KPI changes
from Mac OS X Leopard--rationalize naming for entry points to
the following general forms:

mac_<object>_<method/action>
mac_<object>_check_<method/action>

The previous naming scheme was inconsistent and mostly
reversed from the new scheme. Also, make object types more
consistent and remove spaces from object types that contain
multiple parts ("posix_sem" -> "posixsem") to make mechanical
parsing easier. Introduce a new "netinet" object type for
certain IPv4/IPv6-related methods. Also simplify, slightly,
some entry point names.

All MAC policy modules will need to be recompiled, and modules
not updates as part of this commit will need to be modified to
conform to the new KPI.

Sponsored by: SPARTA (original patches against Mac OS X)
Obtained from: TrustedBSD Project, Apple Computer

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Rename mac_check_vnode_delete() MAC Framework and MAC Policy entry
point to mac_check_vnode_unlink(), reflecting UNIX naming conventions.

This is the first of several commits to synchronize the MAC

Rename mac_check_vnode_delete() MAC Framework and MAC Policy entry
point to mac_check_vnode_unlink(), reflecting UNIX naming conventions.

This is the first of several commits to synchronize the MAC Framework
in FreeBSD 7.0 with the MAC Framework as it will appear in Mac OS X
Leopard.

Reveiwed by: csjp, Samy Bahra <sbahra at gwu dot edu>
Submitted by: Jacques Vidrine <nectar at apple dot com>
Obtained from: Apple Computer, Inc.
Sponsored by: SPARTA, SPAWAR
Approved by: re (bmah)

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Rename mac*devfsdirent*() to mac*devfs*() to synchronize with SEDarwin,
where similar data structures exist to support devfs and the MAC
Framework, but are named differently.

Obtained from: TrustedB

Rename mac*devfsdirent*() to mac*devfs*() to synchronize with SEDarwin,
where similar data structures exist to support devfs and the MAC
Framework, but are named differently.

Obtained from: TrustedBSD Project
Sponsored by: SPARTA, Inc.

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In the MAC Framework implementation, file systems have two per-mountpoint
labels: the mount label (label of the mountpoint) and the fs label (label
of the file system). In practice, policies appear

In the MAC Framework implementation, file systems have two per-mountpoint
labels: the mount label (label of the mountpoint) and the fs label (label
of the file system). In practice, policies appear to only ever use one,
and the distinction is not helpful.

Combine mnt_mntlabel and mnt_fslabel into a single mnt_label, and
eliminate extra machinery required to maintain the additional label.
Update policies to reflect removal of extra entry points and label.

Obtained from: TrustedBSD Project
Sponsored by: SPARTA, Inc.

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Continue 7-CURRENT MAC Framework rearrangement and cleanup:

Don't perform a nested include of _label.h in mac.h, as mac.h now
describes only the user API to MAC, and _label.h defines the in-kernel

Continue 7-CURRENT MAC Framework rearrangement and cleanup:

Don't perform a nested include of _label.h in mac.h, as mac.h now
describes only the user API to MAC, and _label.h defines the in-kernel
representation of MAC labels.

Remove mac.h includes from policies and MAC framework components that do
not use userspace MAC API definitions.

Add _KERNEL inclusion checks to mac_internal.h and mac_policy.h, as these
are kernel-only include files

Obtained from: TrustedBSD Project

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Remove XXX comments about EA transaction support and provide a more
general and detailed comment on the topic of EA transactions and kernel
warnings.

Obtained from: TrustedBSD Project

Move src/sys/sys/mac_policy.h, the kernel interface between the MAC
Framework and security modules, to src/sys/security/mac/mac_policy.h,
completing the removal of kernel-only MAC Framework include f

Move src/sys/sys/mac_policy.h, the kernel interface between the MAC
Framework and security modules, to src/sys/security/mac/mac_policy.h,
completing the removal of kernel-only MAC Framework include files from
src/sys/sys. Update the MAC Framework and MAC policy modules. Delete
the old mac_policy.h.

Third party policy modules will need similar updating.

Obtained from: TrustedBSD Project

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