[rtems commit] Use network epoch to protect local IPv4 addresses hash.
Sebastian Huber
sebh at rtems.org
Mon Jul 11 11:47:03 UTC 2022
Module: rtems
Branch: master
Commit: 94c33ba9920922e05f2dd4c384eaa01f91a58408
Changeset: http://git.rtems.org/rtems/commit/?id=94c33ba9920922e05f2dd4c384eaa01f91a58408
Author: Gleb Smirnoff <glebius at FreeBSD.org>
Date: Sun Oct 10 10:02:26 2021 -0700
Use network epoch to protect local IPv4 addresses hash.
The modification to the hash are already naturally locked by
in_control_sx. Convert the hash lists to CK lists. Remove the
in_ifaddr_rmlock. Assert the network epoch where necessary.
Most cases when the hash lookup is done the epoch is already entered.
Cover a few cases, that need entering the epoch, which mostly is
initial configuration of tunnel interfaces and multicast addresses.
Reviewed by: melifaro
Differential revision: https://reviews.freebsd.org/D32584
---
cpukit/include/machine/_kernel_in.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/cpukit/include/machine/_kernel_in.h b/cpukit/include/machine/_kernel_in.h
index 69b189cfe0..c9dcfbd033 100644
--- a/cpukit/include/machine/_kernel_in.h
+++ b/cpukit/include/machine/_kernel_in.h
@@ -50,7 +50,11 @@ int in_broadcast(struct in_addr, struct ifnet *);
int in_ifaddr_broadcast(struct in_addr, struct in_ifaddr *);
int in_canforward(struct in_addr);
int in_localaddr(struct in_addr);
+#if __FreeBSD_version >= 1400039
+bool in_localip(struct in_addr);
+#else
int in_localip(struct in_addr);
+#endif
int in_ifhasaddr(struct ifnet *, struct in_addr);
struct in_ifaddr *in_findlocal(uint32_t, bool);
int inet_aton(const char *, struct in_addr *); /* in libkern */
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