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3 commits

Author SHA1 Message Date
Daniel Mentz
41aa2c3703 Increase netlink uevent rcvbuf size to 16M
Increase size of the NETLINK_KOBJECT_UEVENT socket receive buffer to
16M.  Also, use SO_RCVBUFFORCE to override any limits set by
/proc/sys/net/core/rmem_max.

We had a couple of instances, where we lost critical uevent messages due
to receive buffer overflows.

Bug: 119933843
Change-Id: I6aab183aa0194e173f9175b47c6beb0835cf6675
2018-12-03 18:39:24 +00:00
Luis Hector Chavez
84c99136fd libcutils: Stop checking the uid of netlink messages
This is a partial revert of
https://android-review.googlesource.com/c/platform/system/core/+/528619.
The uid-check was done before
https://patchwork.kernel.org/patch/1525551/ was available, and thus is
now unnecessary to perform such check, since we can just rely on the
kernel patch now.

Bug: 71632076
Test: aosp_sailfish-userdebug still works

Change-Id: I1d1319b774483d1714ecb4dd838a20e055acc2a3
2018-01-08 13:24:32 -08:00
Luis Hector Chavez
e97a4b9799 libcutils: Make uevent_kernel_* namespace-aware
This change adds user namespace-awareness to uevent_kernel_* in
libcutils. Instead of assuming that root is always uid 0, it detects
whether the uid 0 is mapped in the current user namespace and returns
the appropriately mapped uid (or the kernel's "overflowuid" in case it
is not mapped).

In older kernels, or those where user namespaces are not enabled, this
still uses uid 0 for root.

Bug: 62378620
Test: bullhead networking still works
Test: Android in Chrome OS can now receive netlink-related messages

Change-Id: I7ea3454e8f38b9c70c65294d6b2a99e5a88f9d70
2017-11-03 13:02:46 -07:00
Renamed from libcutils/uevent.c (Browse further)