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Date: Thu, 06 Mar 2014 12:46:15 +0000 From: David Howells <dhowells@...hat.com> To: netdev@...r.kernel.org Cc: dhowells@...hat.com, tim@...ctronghost.co.uk, linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 0/8] AF_RXRPC fixes and development [ver #2] Hi Dave, Here are some AF_RXRPC fixes (to tag rxrpc-20140226): (1) Fix to remove incorrect checksum calculation made during recvmsg(). It's unnecessary to try to do this there since we check the checksum before reading the RxRPC header from the packet. (2) Fix to prevent the sending of an ABORT packet in response to another ABORT packet and inducing a storm. (3) Fix UDP MTU calculation from parsing ICMP_FRAG_NEEDED packets where we don't handle the ICMP packet not specifying an MTU size. And development patches (to tag rxrpc-devel-20140304): (4) Add sysctls for configuring RxRPC parameters, specifically various delays pertaining to ACK generation, the time before we resend a packet for which we don't receive an ACK, the maximum time a call is permitted to live and the amount of time transport, connection and dead call information is cached. (5) Improve ACK packet production by adjusting the handling of ACK_REQUESTED packets, ignoring the MORE_PACKETS flag, delaying the production of otherwise immediate ACK_IDLE packets and delaying all ACK_IDLE production (barring the call termination) to half a second. (6) Add more sysctl parameters to expose the Rx window size, the maximum packet size that we're willing to receive and the number of jumbo rxrpc packets we're willing to handle in a single UDP packet. (7) Request ACKs on alternate DATA packets so that the other side doesn't wait till we fill up the Tx window. (8) Use a RCU hash table to look up the rxrpc_call for an incoming packet rather than stepping through a hierarchy involving several spinlocks. They can be found in this git branch: http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=rxrpc David --- David Howells (5): af_rxrpc: Fix UDP MTU calculation from ICMP_FRAG_NEEDED af_rxrpc: Add sysctls for configuring RxRPC parameters af_rxrpc: Improve ACK production af_rxrpc: Expose more RxRPC parameters via sysctls af_rxrpc: Request an ACK for every alternate DATA packet Tim Smith (3): af_rxrpc: Remove incorrect checksum calculation from rxrpc_recvmsg() af_rxrpc: Prevent RxRPC peers from ABORT-storming one another af_rxrpc: Keep rxrpc_call pointers in a hashtable Documentation/networking/rxrpc.txt | 81 ++++++++++++++ net/rxrpc/Makefile | 5 - net/rxrpc/af_rxrpc.c | 9 ++ net/rxrpc/ar-ack.c | 61 +++++++++- net/rxrpc/ar-call.c | 213 +++++++++++++++++++++++++++++++++++- net/rxrpc/ar-connection.c | 10 +- net/rxrpc/ar-error.c | 1 net/rxrpc/ar-input.c | 190 ++++++++++++++------------------ net/rxrpc/ar-internal.h | 40 ++++++- net/rxrpc/ar-output.c | 15 ++- net/rxrpc/ar-recvmsg.c | 25 ---- net/rxrpc/ar-skbuff.c | 7 + net/rxrpc/ar-transport.c | 10 +- net/rxrpc/sysctl.c | 146 +++++++++++++++++++++++++ 14 files changed, 645 insertions(+), 168 deletions(-) create mode 100644 net/rxrpc/sysctl.c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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