CVS commit: src/sys

["Kengo NAKAHARA" <knakahara%netbsd.org@localhost>]

Module Name:    src
Committed By:   knakahara
Date:           Mon Jul  4 04:14:47 UTC 2016

Modified Files:
        src/sys/net: if_gif.c
        src/sys/netinet: in_gif.c
        src/sys/netinet6: in6_gif.c

Log Message:
let gif(4) promise softint(9) contract (1/2) : gif(4) side

To prevent calling softint_schedule() after called softint_disestablish(),
the following modifications are added
    + ioctl (writing configuration) side
      - off IFF_RUNNING flag before changing configuration
      - wait softint handler completion before changing configuration
    + packet processing (reading configuraiotn) side
      - if IFF_RUNNING flag is on, do nothing
    + in whole
      - add gif_list_lock_{enter,exit} to prevent the same configuration is
        set to other gif(4) interfaces


To generate a diff of this commit:
cvs rdiff -u -r1.113 -r1.114 src/sys/net/if_gif.c
cvs rdiff -u -r1.76 -r1.77 src/sys/netinet/in_gif.c
cvs rdiff -u -r1.75 -r1.76 src/sys/netinet6/in6_gif.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.