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Message-ID: <20221114215757.37455-1-kuniyu@amazon.com>
Date: Mon, 14 Nov 2022 13:57:52 -0800
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
CC: Kuniyuki Iwashima <kuniyu@...zon.com>,
Kuniyuki Iwashima <kuni1840@...il.com>,
<netdev@...r.kernel.org>
Subject: [PATCH v4 net-next 0/5] udp: Introduce optional per-netns hash table.
This series is the UDP version of the per-netns ehash series [0],
which were initially in the same patch set. [1]
The notable difference with TCP is the max table size is 64K and the min
size is 128. This is because the possible hash range by udp_hashfn()
always fits in 64K within the same netns and because we want to keep a
bitmap in udp_lib_get_port() on the stack. Also, the UDP per-netns table
isolates both 1-tuple and 2-tuple tables.
For details, please see the last patch.
patch 1 - 4: prep for per-netns hash table
patch 5: add per-netns hash table
[0]: https://lore.kernel.org/netdev/20220908011022.45342-1-kuniyu@amazon.com/
[1]: https://lore.kernel.org/netdev/20220826000445.46552-1-kuniyu@amazon.com/
Changes:
v4:
* Drop a change to allcate bitmaps dynamically
* Patch 5
* Set the min size to 128 and keep the bitmap on stack (Paolo Abeni)
* Add memset() in the proc handler (Paolo Abeni)
v3: https://lore.kernel.org/netdev/20221111040034.29736-1-kuniyu@amazon.com/
* Drop get_port() fix (posted separately later)
* Patch 3
* Fix CONFIG_PROC_FS=n build failure
* Patch 5
* Allocate bitmap when creating netns (Paolo Abeni)
v2: https://lore.kernel.org/netdev/20221104190612.24206-1-kuniyu@amazon.com/
v1: [1]
Kuniyuki Iwashima (5):
udp: Clean up some functions.
udp: Set NULL to sk->sk_prot->h.udp_table.
udp: Set NULL to udp_seq_afinfo.udp_table.
udp: Access &udp_table via net.
udp: Introduce optional per-netns hash table.
Documentation/networking/ip-sysctl.rst | 27 ++++
include/linux/udp.h | 2 +
include/net/netns/ipv4.h | 3 +
net/core/filter.c | 4 +-
net/ipv4/sysctl_net_ipv4.c | 40 +++++
net/ipv4/udp.c | 196 ++++++++++++++++++++-----
net/ipv4/udp_diag.c | 6 +-
net/ipv4/udp_offload.c | 5 +-
net/ipv6/udp.c | 31 ++--
net/ipv6/udp_offload.c | 5 +-
10 files changed, 261 insertions(+), 58 deletions(-)
--
2.30.2
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