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This matches the structure that new code is being written to,
and removes one more of the old-style named structures, and
the need to know that is is just an alias for struct dom_sid.
Andrew Bartlett
Signed-off-by: Günther Deschner <gd@samba.org>
When a samba server process dies hard, it has no chance to clean up its entries
in locking.tdb, brlock.tdb, connections.tdb and sessionid.tdb.
For locking.tdb and brlock.tdb Samba is robust by checking every time we read
an entry from the database if the corresponding process still exists. If it
does not exist anymore, the entry is deleted. This is not 100% failsafe though:
On systems with a limited PID space there is a non-zero chance that between the
smbd's death and the fresh access, the PID is recycled by another long-running
process. This renders all files that had been locked by the killed smbd
potentially unusable until the new process also dies.
This patch is supposed to fix the problem the following way: Every process ID
in every database is augmented by a random 64-bit number that is stored in a
serverid.tdb. Whenever we need to check if a process still exists we know its
PID and the 64-bit number. We look up the PID in serverid.tdb and compare the
64-bit number. If it's the same, the process still is a valid smbd holding the
lock. If it is different, a new smbd has taken over.
I believe this is safe against an smbd that has died hard and the PID has been
taken over by a non-samba process. This process would not have registered
itself with a fresh 64-bit number in serverid.tdb, so the old one still exists
in serverid.tdb. We protect against this case by the parent smbd taking care of
deregistering PIDs from serverid.tdb and the fact that serverid.tdb is
CLEAR_IF_FIRST.
CLEAR_IF_FIRST does not work in a cluster, so the automatic cleanup does not
work when all smbds are restarted. For this, "net serverid wipe" has to be run
before smbd starts up. As a convenience, "net serverid wipedbs" also cleans up
sessionid.tdb and connections.tdb.
While there, this also cleans up overloading connections.tdb with all the
process entries just for messaging_send_all().
Volker
This is the basis to implement global locks in ctdb without depending on a
shared file system. The initial goal is to make ctdb persistent transactions
deterministic without too many timeouts.
This reverts commit fb262f79fa
and related commits c36031778e72fd5fa6bb and
38cd0e086f
This change caused more trouble than it solved. We need to do this differently.
Reverting so we don't accidently release this.
Attention:
The meaning of the -N flag changed.
To get the old meaning for net groupmap set, use the long option --ntname
The long option for using kerberos changed from --kerberos to --use-kerberos
net rpc commands will now prompt for a password if none is given.
As a benefit, net will now accept an authentication file like other samba
command line tools. So no need to specify the password on the command line in
scripts anymore.
This should fix bug #6357
Signed-off-by: Kai Blin <kai@samba.org>
This adds a lua command line interpreter with some sample code how to build
your own data types based on our internal data types.
Not meant as the final word, but as a playground for experiments for people.
Might be removed later when we find this turns out to be too awkward.
