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Guenther
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Volker, Tridge and other clustering gurus, please check.
It is ok to get rid of ifdef CLUSTER_SUPPORT here, right ?
Why was unique_id not marshalled at all ?
Guenther
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Eventually we'll get this right...
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In the child, we fully re-open messaging.tdb, which leads to one fcntl lock for
CLEAR_IF_FIRST detection per smbd. This opens the tdb in the parent and holds
it, so that tdb_reopen_all correctly catches the CLEAR_IF_FIRST bit.
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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
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metze
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Guenther
(This used to be commit 6c346d0eb20af5ba9b09f30319420f7c91480da6)
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Jeremy.
(This used to be commit 7eeed8bb41059ec2bddedb6a71deddeec7f33af2)
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metze
(This used to be commit 7418c3ab1d8f18403f5a43817b2cc14e15090fca)
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metze
(This used to be commit ee6325495f48bab43a37d740a6eca57192004d57)
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Guenther
(This used to be commit 10fa43f2840899c0854763e55b9174827c522a5b)
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bugs in various places whilst doing this (places that assumed
BOOL == int). I also need to fix the Samba4 pidl generation
(next checkin).
Jeremy.
(This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
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So there is a new subcommand "smbcontrol winbindd validate-cache" now.
This change provides the infrastructure:
The function currently returns "true" unconditionally.
The call of a real cache validation function will be incorporated
in subsequent changes.
Michael
(This used to be commit ef92d505c04397614cb0dd5ede967e9017a5e302)
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to fix the cluster case
vl: please check, if this works with clustering = no
metze
(This used to be commit 9d4104b8d5773537f2271f7be1439f1da1e0bf42)
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(This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
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Jeremy.
(This used to be commit 407e6e695b8366369b7c76af1ff76869b45347b3)
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Guenther
(This used to be commit 0d956a8e45cd4421cddb8e077e1960dafac3a4d0)
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I'm 100% certain I've forgotten to merge something, but the main code
should be in. It's mainly in dbwrap_ctdb.c, ctdbd_conn.c and
messages_ctdbd.c.
There should be no changes to the non-cluster case, it does survive make
test on my laptop.
It survives some very basic tests with ctdbd enables, I did not do the
full test suite for clusters yet.
Phew...
Volker
(This used to be commit 15553d6327a3aecdd2b0b94a3656d04bf4106323)
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branch, please check if it fulfils your needs.
Two changes: The validation is not done inside the brlock.c traverse_fn,
it's done as a separate routine.
Secondly, this patch does not call the checker routines in smbcontrol
directly but depends on a running smbd.
(This used to be commit 7e39d77c1f90d9025cab08918385d140e20ca25b)
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This removes message_block / message_unblock. I've talked to Jeremy and
Günther, giving them my reasons why I believe they have no effect.
Neither could come up with a counter-argument, so they go :-)
(This used to be commit a925e0991ffbaea4a533bab3a5d61e5d367d46c8)
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is now
replaced by MSG_FLAG_LOWPRIORITY or'ed into the msg_type. To enable this,
changed the msg_type definitions to hexadecimal.
This way we could theoretically add the MSG_FLAG_NODUPLICATES again, but I
would rather not do this, because that one is racy and can't be guaranteed at
all.
(This used to be commit 3f5eb8a9600839a9f9c44c553f0bda6df22b30b0)
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doing this because for the clustering the marshalling is needed in more
than one place, so I wanted a decent routine to marshall a message_rec
struct which was not there before.
Tridge, this seems about the same speed as it used to be before, the
librpc/ndr overhead in my tests was under the noise.
Volker
(This used to be commit eaefd00563173dfabb7716c5695ac0a2f7139bb6)
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patch.
This changes "struct process_id" to "struct server_id", keeping both is
just too much hassle. No functional change (I hope ;-))
Volker
(This used to be commit 0ad4b1226c9d91b72136310d3bbb640d2c5d67b8)
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Volker
(This used to be commit a3c1069b0c3da914e2ac7337fd9e924b1c811d39)
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and the
resulting marshalling/unmarshalling routines in gen_ndr/
Volker
(This used to be commit a2ea54c23456925a8ed317edb1adf82d074041fc)
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with -DDEVELOPER.
Jeremy.
(This used to be commit 7f817067a70930ee3502ea3373173e0c23733253)
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make sense
again :-)
Volker
(This used to be commit 5533cdeec1b0cdee39b1d89e2320587dc9281ee6)
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(This used to be commit a174b49173e7185abb89e605e667e64e8dd87454)
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Checking in because Jeremy was bugging me. Potentially this becomes quite
intrusive, I'm not sure if I should open a temporary branch for this.
Jeremy, Jerry, do you think 3_0 is the right place for this?
Volker
(This used to be commit bcf5c751cbe203c00814642e26440cf88f300bce)
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Now I've done this I might be able to reduce the probe
timeout and reduce the backoff algorithm, going back
to checking every cache time seconds (5 mins by default),
as the parent or forked domain child will never block.
Jeremy.
(This used to be commit d0add5f946cf63ea43067e8e935876b5346d11de)
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test. Phew - that was painful :-). But what it means
is that we now implement lock cancels and I can add
lock cancels into POSIX lock handling which will fix
the fast/slow system call issue with cifsfs !
Jeremy.
(This used to be commit f1a9cf075b87c76c032d19da0168424c90f6cb3c)
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Guenther
(This used to be commit 9e15b1659c105b0be846e8f71c27b20eab961bd2)
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is produced when a process exits abnormally.
First, we coalesce the core dumping code so that we greatly improve our
odds of being able to produce a core file, even in the case of a memory
fault. I've removed duplicates of dump_core() and split it in two to
reduce the amount of work needed to actually do the dump.
Second, we refactor the exit_server code path to always log an explanation
and a stack trace. My goal is to always produce enough log information
for us to be able to explain any server exit, though there is a risk
that this could produce too much log information on a flaky network.
Finally, smbcontrol has gained a smbd fault injection operation to test
the changes above. This is only enabled for developer builds.
(This used to be commit 56bc02d64498eb3faf89f0c5452b9299daea8e95)
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Sync with trunk as off r13315
(This used to be commit 17e63ac4ed8325c0d44fe62b2442449f3298559f)
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that have open file handles to allow them to correctly
implement delete on close. There is a further correctness
fix I'm intending to add to this to cope with different share
paths, but not right now...
Jeremy.
(This used to be commit 932e337db8788e75344e1c7cf1ef009d090cb039)
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* \PIPE\unixinfo
* winbindd's {group,alias}membership new functions
* winbindd's lookupsids() functionality
* swat (trunk changes to be reverted as per discussion with Deryck)
(This used to be commit 939c3cb5d78e3a2236209b296aa8aba8bdce32d3)
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(This used to be commit a0ac9a8ffd4af31a0ebc423b4acbb2f043d865b8)
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memory cache associated with open printer handles; also make sure that register_messages_flags() doesn't overwrite the originally registers flags
(This used to be commit 540daf71d8ad189af5dd6d45aa1ce2b3d67da752)
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update process and allow printers to have different sharenames from printernames
(This used to be commit 066b9c4276a968788a03709a00d4f672ac032df7)
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(This used to be commit f49c0f6c8716a5c1aff7613d7b59f312a2abdfb3)
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for smb -> smb lock release). Adds new PENDING_LOCK type to lockdb
(does not interfere with existing locks).
Jeremy.
(This used to be commit 766928bbba1e597c9c2b12458dd8d37e6080593e)
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Jeremy.
(This used to be commit 10328a417f070dd0f7e7f2e34501b8402c5c478a)
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(This used to be commit 65e7b5273bb58802bf0c389b77f7fcae0a1f6139)
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(This used to be commit 3928578b52cfc949be5e0ef444fce1558d75f290)
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(This used to be commit 03ac082dcb375b6f3ca3d810a6a6367542bc23ce)
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