OpenAFS Master Repository branch, master, updated. openafs-devel-1_9_0-117-g9e98d61

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 9e98d61ff41709cee8d484be1ecd638a18e2ce0f
Author: Tim Creech <tcreech@tcreech.com>
Date:   Sat Dec 21 18:22:40 2019 -0600

    FBSD: Add proper locks when traversing net ifaces
    
    When traversing the list of network interfaces, or the list of
    addresses for a network interface, we're supposed to lock the relevant
    resource with IFNET_RLOCK, if_addr_rlock, or IN_IFADDR_RLOCK. Add
    these locks around our code that examines network interfaces, to
    avoid issues if the interface or address list changes while we're
    traversing them.
    
    While we're doing this, move around some "AFS_DARWIN_ENV ||
    AFS_FBSD_ENV" ifdefs, since these were getting a bit hard to read.
    This commit adds some duplicated code, but the result should be easier
    to follow.
    
    Also for FreeBSD 12, we must be in NET_EPOCH_ENTER when calling
    ifa_ifwithnet/rx_ifaddr_withnet (it panics if we don't, with
    INVARIANTS). Add the needed NET_EPOCH_ENTER/EXIT calls, but do so a
    bit higher up the call stack, since the returned structures are
    potentially no longer valid after we NET_EPOCH_EXIT. Since this means
    we're calling these in a few places in libafs, create a couple of rx
    abstractions (RX_NET_EPOCH_ENTER) to handle the relevant ifdefs.
    
    [adeason@dson.org: Various adjustments to locking calls; splitting up
    DARWIN/FBSD ifdefs.]
    
    Change-Id: I65d63b99b6f6ef3254325cce9338be27ef78478c
    Reviewed-on: https://gerrit.openafs.org/13998
    Reviewed-by: Tim Creech <tcreech@tcreech.com>
    Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
    Tested-by: BuildBot <buildbot@rampaginggeek.com>

 src/afs/afs_call.c    |    6 ++++++
 src/afs/afs_server.c  |    3 +++
 src/afs/sysincludes.h |    1 +
 src/rx/rx_kcommon.c   |   27 +++++++++++++++++++++------
 src/rx/rx_kernel.h    |    8 ++++++++
 5 files changed, 39 insertions(+), 6 deletions(-)

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