We used to hash the file_context and skip the restorecon on the top
level directory if the hash doesn't change. But the file_context
might change after an OTA update; and some users experienced long
restorecon time as they have lots of files under directories like
/data/media.
This CL tries to hash all the partial match entries in the
file_context for each directory; and skips the restorecon if that
digest stays the same, regardless of the changes to the other parts
of file_context.
This is a version ported from Android that was originally written by:
xunchang <xunchang@google.com>
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
It seems validatetrans support was never added to libselinux, despite being added to
selinuxfs in kernel version 4.5
There is a utility to test, however the targeted policy has no validatetrans rules so some must be added:
$ cat validatetrans.cil
(mlsvalidatetrans db_table (and (or (or (or (eq l1 l2) (and (eq t3 unconfined_t) (domby l1 l2))) (and (eq t3 unconfined_t) (dom l1 l2))) (and (eq t3 unconfined_t) (incomp l1 l2))) (or (or (or (eq l1 h2) (and (eq t3 unconfined_t) (domby h1 h2))) (and (eq t3 unconfined_t) (dom h1 h2))) (and (eq t3 unconfined_t) (incomp h1 h2)))))
$ sudo semodule -i validatetrans.cil
$ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r: # invalid context here
opening /sys/fs/selinux/validatetrans
security_validatetrans returned -1 errno: Invalid argument
$ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r:init_t:s0
opening /sys/fs/selinux/validatetrans
security_validatetrans returned -1 errno: Operation not permitted
$ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r:unconfined_t:s0
opening /sys/fs/selinux/validatetrans
security_validatetrans returned 0 errno: Success
Signed-off-by: Joshua Brindle <joshua.brindle@crunchydata.com>
Remove util/selinux_restorecon.c and tidy up. This is removed as
the functionality is now in policycoreutils/setfiles.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
This is a new 'compiler' which tranforms the file context database into
a binary format. This binary format may be mmap'd in later removing the
need to compile the regular expression at run time.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
There is a .gitignore at the head of the directory but only contains
entries for the utils directory. Move to the utils directory.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
This utility will tell what context a new task will have after exec
based on the pathname and the context of the launching task.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
Richard Haines
Joshua Brindle
Nicolas Iooss
Eric Paris
Eric Paris