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| author | Jason Xing <[email protected]> | 2025-03-17 12:03:13 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2025-03-25 11:27:19 +0000 |
| commit | f38805c5d26fe4af97837c10d58074a7496638bf (patch) | |
| tree | d19c016a9c6069ab703e7c2d7d64abcd95952674 /net/unix/sysctl_net_unix.c | |
| parent | Merge branch 'mlxsw-add-vxlan-to-the-same-hardware-domain-as-physical-bridge-... (diff) | |
| download | kernel-f38805c5d26fe4af97837c10d58074a7496638bf.tar.gz kernel-f38805c5d26fe4af97837c10d58074a7496638bf.zip | |
tcp: support TCP_RTO_MIN_US for set/getsockopt use
Support adjusting/reading RTO MIN for socket level by using set/getsockopt().
This new option has the same effect as TCP_BPF_RTO_MIN, which means it
doesn't affect RTAX_RTO_MIN usage (by using ip route...). Considering that
bpf option was implemented before this patch, so we need to use a standalone
new option for pure tcp set/getsockopt() use.
When the socket is created, its icsk_rto_min is set to the default
value that is controlled by sysctl_tcp_rto_min_us. Then if application
calls setsockopt() with TCP_RTO_MIN_US flag to pass a valid value, then
icsk_rto_min will be overridden in jiffies unit.
This patch adds WRITE_ONCE/READ_ONCE to avoid data-race around
icsk_rto_min.
Signed-off-by: Jason Xing <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'net/unix/sysctl_net_unix.c')
0 files changed, 0 insertions, 0 deletions