Date: Tue, 11 Nov 2003 19:14:32 -0800 (PST) From: Robert Watson <rwatson@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/conf files src/sys/fs/devfs devfs.h src/sys/kern kern_exec.c kern_mac.c src/sys/net bpfdesc.h if_var.h src/sys/netinet ip_var.h src/sys/security/mac mac_internal.h mac_label.c mac_net.c mac_pipe.c mac_process.c mac_system.c ... Message-ID: <200311120314.hAC3EWf8030528@repoman.freebsd.org>
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rwatson 2003/11/11 19:14:32 PST
FreeBSD src repository
Modified files:
sys/conf files
sys/fs/devfs devfs.h
sys/kern kern_exec.c kern_mac.c
sys/net bpfdesc.h if_var.h
sys/netinet ip_var.h
sys/security/mac mac_internal.h mac_net.c mac_pipe.c
mac_process.c mac_system.c mac_vfs.c
sys/security/mac_biba mac_biba.c
sys/security/mac_lomac mac_lomac.c
sys/security/mac_mls mac_mls.c
sys/security/mac_partition mac_partition.c
sys/security/mac_test mac_test.c
sys/sys mac.h mount.h pipe.h proc.h socketvar.h
ucred.h vnode.h
Added files:
sys/security/mac mac_label.c
Log:
Modify the MAC Framework so that instead of embedding a (struct label)
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
Revision Changes Path
1.849 +1 -0 src/sys/conf/files
1.18 +1 -1 src/sys/fs/devfs/devfs.h
1.232 +11 -13 src/sys/kern/kern_exec.c
1.105 +57 -62 src/sys/kern/kern_mac.c
1.24 +1 -2 src/sys/net/bpfdesc.h
1.62 +1 -2 src/sys/net/if_var.h
1.79 +1 -5 src/sys/netinet/ip_var.h
1.106 +9 -5 src/sys/security/mac/mac_internal.h
1.1 +97 -0 src/sys/security/mac/mac_label.c (new)
1.105 +155 -104 src/sys/security/mac/mac_net.c
1.104 +11 -14 src/sys/security/mac/mac_pipe.c
1.104 +43 -21 src/sys/security/mac/mac_process.c
1.102 +4 -4 src/sys/security/mac/mac_system.c
1.104 +139 -83 src/sys/security/mac/mac_vfs.c
1.66 +68 -68 src/sys/security/mac_biba/mac_biba.c
1.21 +56 -56 src/sys/security/mac_lomac/mac_lomac.c
1.53 +61 -61 src/sys/security/mac_mls/mac_mls.c
1.8 +9 -9 src/sys/security/mac_partition/mac_partition.c
1.32 +91 -91 src/sys/security/mac_test/mac_test.c
1.47 +7 -4 src/sys/sys/mac.h
1.151 +2 -3 src/sys/sys/mount.h
1.25 +0 -1 src/sys/sys/pipe.h
1.358 +1 -2 src/sys/sys/proc.h
1.107 +2 -3 src/sys/sys/socketvar.h
1.47 +1 -2 src/sys/sys/ucred.h
1.230 +1 -2 src/sys/sys/vnode.h
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