kernel_optimize_test/security/selinux
Ondrej Mosnacek 5007728980 selinux: hash context structure directly
Always hashing the string representation is inefficient. Just hash the
contents of the structure directly (using jhash). If the context is
invalid (str & len are set), then hash the string as before, otherwise
hash the structured data.

Since the context hashing function is now faster (about 10 times), this
patch decreases the overhead of security_transition_sid(), which is
called from many hooks.

The jhash function seemed as a good choice, since it is used as the
default hashing algorithm in rhashtable.

Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Reviewed-by: Jeff Vander Stoep <jeffv@google.com>
Tested-by: Jeff Vander Stoep <jeffv@google.com>
[PM: fixed some spelling errors in the comments pointed out by JVS]
Signed-off-by: Paul Moore <paul@paul-moore.com>
2020-04-17 16:04:34 -04:00
..
include selinux: remove unused initial SIDs and improve handling 2020-02-27 19:34:24 -05:00
ss selinux: hash context structure directly 2020-04-17 16:04:34 -04:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
avc.c selinux: ensure we cleanup the internal AVC counters on error in avc_update() 2019-12-21 10:59:21 -05:00
hooks.c selinux/stable-5.7 PR 20200330 2020-03-31 15:07:55 -07:00
ibpkey.c selinux: clean up selinux_enabled/disabled/enforcing_boot 2019-12-18 21:22:46 -05:00
Kconfig Documentation,selinux: deprecate setting checkreqprot to 1 2020-02-10 10:49:01 -05:00
Makefile selinux: hash context structure directly 2020-04-17 16:04:34 -04:00
netif.c selinux: clean up selinux_enabled/disabled/enforcing_boot 2019-12-18 21:22:46 -05:00
netlabel.c
netlink.c
netnode.c selinux: clean up selinux_enabled/disabled/enforcing_boot 2019-12-18 21:22:46 -05:00
netport.c selinux: clean up selinux_enabled/disabled/enforcing_boot 2019-12-18 21:22:46 -05:00
nlmsgtab.c net: bridge: vlan: add rtm definitions and dump support 2020-01-15 13:48:17 +01:00
selinuxfs.c selinux: remove unused initial SIDs and improve handling 2020-02-27 19:34:24 -05:00
status.c selinux: move status variables out of selinux_ss 2020-02-10 10:49:01 -05:00
xfrm.c