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authorBhasker Hariharan <bhaskerh@google.com>2020-06-24 10:21:44 -0700
committergVisor bot <gvisor-bot@google.com>2020-06-24 10:24:20 -0700
commitb070e218c6fe61c6ef98e0a3af5ad58d7e627632 (patch)
treecb16be57834182aba9dca74f15153197dc2c8f08 /pkg/p9/p9test/client_test.go
parent364ac92baf83f2352f78b718090472639bd92a76 (diff)
Add support for Stack level options.
Linux controls socket send/receive buffers using a few sysctl variables - net.core.rmem_default - net.core.rmem_max - net.core.wmem_max - net.core.wmem_default - net.ipv4.tcp_rmem - net.ipv4.tcp_wmem The first 4 control the default socket buffer sizes for all sockets raw/packet/tcp/udp and also the maximum permitted socket buffer that can be specified in setsockopt(SOL_SOCKET, SO_(RCV|SND)BUF,...). The last two control the TCP auto-tuning limits and override the default specified in rmem_default/wmem_default as well as the max limits. Netstack today only implements tcp_rmem/tcp_wmem and incorrectly uses it to limit the maximum size in setsockopt() as well as uses it for raw/udp sockets. This changelist introduces the other 4 and updates the udp/raw sockets to use the newly introduced variables. The values for min/max match the current tcp_rmem/wmem values and the default value buffers for UDP/RAW sockets is updated to match the linux value of 212KiB up from the really low current value of 32 KiB. Updates #3043 Fixes #3043 PiperOrigin-RevId: 318089805
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