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If link_(un|)set_flags() does not need to change the existing flags to

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satisfy the request, then return 1 rather than 0 and do not ask
netlink to perform any changes.
This commit is contained in:
Nicholas J. Kain 2014-03-17 05:35:34 -04:00
parent b0a5132d72
commit 83610972c3
1 changed files with 4 additions and 0 deletions
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4
ndhc/ifset.c
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@ -348,6 +348,8 @@ static int link_set_flags(int fd, uint32_t flags)
client_config.interface, __func__, r); client_config.interface, __func__, r);
return -1; return -1;
} }
if ((oldflags & flags) == flags)
return 1;
return (int)rtnl_if_flags_send(fd, RTM_SETLINK, flags | oldflags); return (int)rtnl_if_flags_send(fd, RTM_SETLINK, flags | oldflags);
} }
@ -362,6 +364,8 @@ static int link_unset_flags(int fd, uint32_t flags)
client_config.interface, __func__, r); client_config.interface, __func__, r);
return -1; return -1;
} }
if ((oldflags & flags) == 0)
return 1;
return (int)rtnl_if_flags_send(fd, RTM_SETLINK, oldflags & ~flags); return (int)rtnl_if_flags_send(fd, RTM_SETLINK, oldflags & ~flags);
} }
#endif #endif