1. 17 Jan, 2019 1 commit
  2. 09 Nov, 2018 1 commit
    • Stefano Brivio's avatar
      net: Convert protocol error handlers from void to int · 32bbd879
      Stefano Brivio authored
      
      
      We'll need this to handle ICMP errors for tunnels without a sending socket
      (i.e. FoU and GUE). There, we might have to look up different types of IP
      tunnels, registered as network protocols, before we get a match, so we
      want this for the error handlers of IPPROTO_IPIP and IPPROTO_IPV6 in both
      inet_protos and inet6_protos. These error codes will be used in the next
      patch.
      
      For consistency, return sensible error codes in protocol error handlers
      whenever handlers can't handle errors because, even if valid, they don't
      match a protocol or any of its states.
      
      This has no effect on existing error handling paths.
      Signed-off-by: default avatarStefano Brivio <sbrivio@redhat.com>
      Reviewed-by: default avatarSabrina Dubroca <sd@queasysnail.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      32bbd879
  3. 02 Nov, 2017 1 commit
    • Greg Kroah-Hartman's avatar
      License cleanup: add SPDX GPL-2.0 license identifier to files with no license · b2441318
      Greg Kroah-Hartman authored
      Many source files in the tree are missing licensing information, which
      makes it harder for compliance tools to determine the correct license.
      
      By default all files without license information are under the default
      license of the kernel, which is GPL version 2.
      
      Update the files which contain no license information with the 'GPL-2.0'
      SPDX license identifier.  The SPDX identifier is a legally binding
      shorthand, which can be used instead of the full boiler plate text.
      
      This patch is based on work done by Thomas Gleixner and Kate Stewart and
      Philippe Ombredanne.
      
      How this work was done:
      
      Patches were generated and checked against linux-4.14-rc6 for a subset of
      the use cases:
       - file had no licensing information it it.
       - file was a */uapi/* one with no licensing information in it,
       - file was a */uapi/* one with existing licensing information,
      
      Further patches will be generated in subsequent months to fix up cases
      where non-standard...
      b2441318
  4. 18 May, 2017 1 commit
  5. 24 Nov, 2016 1 commit
    • Eric Dumazet's avatar
      udplite: call proper backlog handlers · 30c7be26
      Eric Dumazet authored
      In commits 93821778 ("udp: Fix rcv socket locking") and
      f7ad74fe ("net/ipv6/udp: UDP encapsulation: break backlog_rcv into
      __udpv6_queue_rcv_skb") UDP backlog handlers were renamed, but UDPlite
      was forgotten.
      
      This leads to crashes if UDPlite header is pulled twice, which happens
      starting from commit e6afc8ac ("udp: remove headers from UDP packets
      before queueing")
      
      Bug found by syzkaller team, thanks a lot guys !
      
      Note that backlog use in UDP/UDPlite is scheduled to be removed starting
      from linux-4.10, so this patch is only needed up to linux-4.9
      
      Fixes: 93821778 ("udp: Fix rcv socket locking")
      Fixes: f7ad74fe ("net/ipv6/udp: UDP encapsulation: break backlog_rcv into __udpv6_queue_rcv_skb")
      Fixes: e6afc8ac
      
       ("udp: remove headers from UDP packets before queueing")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reported-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Cc: Benjamin LaHaise <bcrl@kvack.org>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      30c7be26
  6. 02 Mar, 2015 1 commit
  7. 19 Oct, 2013 1 commit
  8. 15 Apr, 2012 1 commit
  9. 30 Sep, 2009 1 commit
  10. 29 Oct, 2008 1 commit
    • Eric Dumazet's avatar
      udp: introduce struct udp_table and multiple spinlocks · 645ca708
      Eric Dumazet authored
      
      
      UDP sockets are hashed in a 128 slots hash table.
      
      This hash table is protected by *one* rwlock.
      
      This rwlock is readlocked each time an incoming UDP message is handled.
      
      This rwlock is writelocked each time a socket must be inserted in
      hash table (bind time), or deleted from this table (close time)
      
      This is not scalable on SMP machines :
      
      1) Even in read mode, lock() and unlock() are atomic operations and
       must dirty a contended cache line, shared by all cpus.
      
      2) A writer might be starved if many readers are 'in flight'. This can
       happen on a machine with some NIC receiving many UDP messages. User
       process can be delayed a long time at socket creation/dismantle time.
      
      This patch prepares RCU migration, by introducing 'struct udp_table
      and struct udp_hslot', and using one spinlock per chain, to reduce
      contention on central rwlock.
      
      Introducing one spinlock per chain reduces latencies, for port
      randomization on heavily loaded UDP servers. This also speedup
      bindings to specific ports.
      
      udp_lib_unhash() was uninlined, becoming to big.
      
      Some cleanups were done to ease review of following patch
      (RCUification of UDP Unicast lookups)
      Signed-off-by: default avatarEric Dumazet <dada1@cosmosbay.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      645ca708
  11. 15 Jun, 2008 1 commit
  12. 22 Mar, 2008 1 commit
  13. 10 Oct, 2007 1 commit
  14. 07 Jun, 2007 1 commit
  15. 11 May, 2007 1 commit
  16. 11 Feb, 2007 1 commit
  17. 03 Dec, 2006 1 commit
    • Gerrit Renker's avatar
      [NET]: Supporting UDP-Lite (RFC 3828) in Linux · ba4e58ec
      Gerrit Renker authored
      
      
      This is a revision of the previously submitted patch, which alters
      the way files are organized and compiled in the following manner:
      
      	* UDP and UDP-Lite now use separate object files
      	* source file dependencies resolved via header files
      	  net/ipv{4,6}/udp_impl.h
      	* order of inclusion files in udp.c/udplite.c adapted
      	  accordingly
      
      [NET/IPv4]: Support for the UDP-Lite protocol (RFC 3828)
      
      This patch adds support for UDP-Lite to the IPv4 stack, provided as an
      extension to the existing UDPv4 code:
              * generic routines are all located in net/ipv4/udp.c
              * UDP-Lite specific routines are in net/ipv4/udplite.c
              * MIB/statistics support in /proc/net/snmp and /proc/net/udplite
              * shared API with extensions for partial checksum coverage
      
      [NET/IPv6]: Extension for UDP-Lite over IPv6
      
      It extends the existing UDPv6 code base with support for UDP-Lite
      in the same manner as per UDPv4. In particular,
              * UDPv6 generic and shared code is in net/ipv6/udp.c
              * UDP-Litev6 specific extensions are in net/ipv6/udplite.c
              * MIB/statistics support in /proc/net/snmp6 and /proc/net/udplite6
              * support for IPV6_ADDRFORM
              * aligned the coding style of protocol initialisation with af_inet6.c
              * made the error handling in udpv6_queue_rcv_skb consistent;
                to return `-1' on error on all error cases
              * consolidation of shared code
      
      [NET]: UDP-Lite Documentation and basic XFRM/Netfilter support
      
      The UDP-Lite patch further provides
              * API documentation for UDP-Lite
              * basic xfrm support
              * basic netfilter support for IPv4 and IPv6 (LOG target)
      Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ba4e58ec