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genetlink: no longer support using static family IDs

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Static family IDs have never really been used, the only
use case was the workaround I introduced for those users
that assumed their family ID was also their multicast
group ID.

Additionally, because static family IDs would never be
reserved by the generic netlink code, using a relatively
low ID would only work for built-in families that can be
registered immediately after generic netlink is started,
which is basically only the control family (apart from
the workaround code, which I also had to add code for so
it would reserve those IDs)

Thus, anything other than GENL_ID_GENERATE is flawed and
luckily not used except in the cases I mentioned. Move
those workarounds into a few lines of code, and then get
rid of GENL_ID_GENERATE entirely, making it more robust.

Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Johannes Berg 2016-10-24 14:40:02 +02:00 • committed by David S. Miller
commit a07ea4d994
37 changed files with 24 additions and 69 deletions
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1
fs/dlm/netlink.c
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@ -17,7 +17,6 @@ static uint32_t dlm_nl_seqnum;
static uint32_t listener_nlportid;
static struct genl_family family = {
.id = GENL_ID_GENERATE,
.name = DLM_GENL_NAME,
.version = DLM_GENL_VERSION,
};