git: kernel - Adjust ssb_space_prealloc() use cases

[Matthew Dillon]

commit a5e9382686e31add8639d621f888ae44457bdda2
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Fri Jul 18 09:32:46 2014 -0700

    kernel - Adjust ssb_space_prealloc() use cases
    
    * Add two flags to the signalsockbuf ssb_flags field.
    
      SSB_PREALLOC  - Indicates that data preallocation tracking is being used
      SSB_STOPSUPP	- Indicates that SSB_STOP flow control is being used
    
    * unix domain sockets set SSB_STOPSUPP, tcp and sctp sockets
      set SSB_PREALLOC.
    
    * sendfile() requires that either SSB_PREALLOC or SSB_STOPSUPP be specified.
    
    * Code now conditionalizes the use of ssb_space() vs ssb_space_prealloc()
      based on the presence of the SSB_PREALLOC flag.
    
    Reported-by: sephe

Summary of changes:
 sys/kern/uipc_socket2.c   |  9 +++++++--
 sys/kern/uipc_syscalls.c  | 38 ++++++++++++++++++++++++++++++--------
 sys/kern/uipc_usrreq.c    | 12 +++++++++++-
 sys/netinet/sctp_usrreq.c |  3 +++
 sys/netinet/tcp_usrreq.c  |  4 ++--
 sys/sys/socketvar.h       |  2 ++
 6 files changed, 55 insertions(+), 13 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/a5e9382686e31add8639d621f888ae44457bdda2


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