forked from luck/tmp_suning_uos_patched
1b8b31a2e6
Convert the policy read-write lock to RCU. This is significantly simplified by the earlier work to encapsulate the policy data structures and refactor the policy load and boolean setting logic. Move the latest_granting sequence number into the selinux_policy structure so that it can be updated atomically with the policy. Since removing the policy rwlock and moving latest_granting reduces the selinux_ss structure to nothing more than a wrapper around the selinux_policy pointer, get rid of the extra layer of indirection. At present this change merely passes a hardcoded 1 to rcu_dereference_check() in the cases where we know we do not need to take rcu_read_lock(), with the preceding comment explaining why. Alternatively we could pass fsi->mutex down from selinuxfs and apply a lockdep check on it instead. Based in part on earlier attempts to convert the policy rwlock to RCU by Kaigai Kohei [1] and by Peter Enderborg [2]. [1] https://lore.kernel.org/selinux/6e2f9128-e191-ebb3-0e87-74bfccb0767f@tycho.nsa.gov/ [2] https://lore.kernel.org/selinux/20180530141104.28569-1-peter.enderborg@sony.com/ Signed-off-by: Stephen Smalley <stephen.smalley.work@gmail.com> Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com> |
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| .. | ||
| avtab.c | ||
| avtab.h | ||
| conditional.c | ||
| conditional.h | ||
| constraint.h | ||
| context.c | ||
| context.h | ||
| ebitmap.c | ||
| ebitmap.h | ||
| hashtab.c | ||
| hashtab.h | ||
| mls_types.h | ||
| mls.c | ||
| mls.h | ||
| policydb.c | ||
| policydb.h | ||
| services.c | ||
| services.h | ||
| sidtab.c | ||
| sidtab.h | ||
| symtab.c | ||
| symtab.h | ||