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Also free dns_name when freeing an 'nlist', so do the unlink before the free.
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statd now passes the 'my_name' from the SM_MON call faithfully to the
ha-callout and records it in the sm/ files.
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Both SM_STAT and SM_MON can return the state of an NSM, but it is
unclear which NSM they return the state of, so the value cannot be
used, and lockd doesn't use it.
Document this confusion, and give the current state to the kernel
via a sysctl if that sysctl is available (since about 2.6.19).
This should make is possible for the NFS server to detect a small
class of bad SM_NOTIFY packets and not flush locks in that case.
Signed-off-by: Neil Brown <neilb@suse.de>
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When lockd asks to monitor a host, we find the FQDN from the DNS
and remember that, both internally and in the /var/lib/nfs/sm/*
file.
When we receive an SM_NOTIFY request, we compare both the
mon_name and the source IP address against that DNS name to find
a match.
If a DNS name is not available, we fall back to the name provided by
lockd, which at least is known to map to an IP address via
gethostbyname.
Signed-off-by: Neil Brown <neilb@suse.de>
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From the point of view of the client (lockd), the 'priv' blob is probably
the most important key, so make sure to not throw away requests with
new 'priv' information.
Signed-off-by: Neil Brown <neilb@suse.de>
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The if contains a while with essentially the same condition.
Signed-off-by: Neil Brown <neilb@suse.de>
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If statd dies and is restarted, it forgets what peers the kernel
is interested in monitoring, and so will not forward NOTIFY
requests properly.
With this patch the required information is recorded in the files
in /var/lib/nfs/sm/* so that a kill/restart does what you might
hope.
Signed-off-by: Neil Brown <neilb@suse.de>
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i.e. you now need --disable-secure-statd if you want any client
other than lockd to talk to statd.
Also relax the RESTRICTED_STATD checks so that a recent kernel
with /proc/sys/fs/nfs/nsm_use_hostnames set can still talk to
statd.
Finally, restrict access to simulate_crash so that only privileged
processes on localhost can call it. Having it accessible by the
whole world is probably not much more than a minor inconvenience,
but it really should be kept closed.
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unused labels, constness, signedness.
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* utils/statd/monitor.c (sm_mon_1_svc): Fix buggy check for
program and procedure numbers of kernel lockd's callback. Also,
besides the old (and broken) procedure #24, allow #16 per Trond.
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port 100021.
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