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when CTDB is unhealthy, log a message and exit cleanly
instead of creating a core file
Autobuild-User: Christian Ambach <ambi@samba.org>
Autobuild-Date: Thu Jun 30 13:18:12 CEST 2011 on sn-devel-104
This has been a wrapper around server_event_context() for some time
now, and removing this from dummmysmbd.c assists with library
dependencies.
Andrew Bartlett
This provides the 'sconn' parameter to this key functions, that
is currently duplicated in dummysmbd.c, which causes duplicate symbol
issues in the waf build.
This has natrually caused a number of consequential changes across the
codebase, includning not passing a messaging context into initial
reload_services():
This causes problems because the global smbd_server_connection isn't
yet set up, as there isn't a connection here, just the initial
process.
Andrew Bartlett
this allows the fd to be setup by subsystems that want to use the s3
server core code
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
Autobuild-User: Andrew Bartlett <abartlet@samba.org>
Autobuild-Date: Sun May 8 12:01:13 CEST 2011 on sn-devel-104
cont_fn() was supposed to be a way to continue after a seg fault. It
could never be called however, as smb_panic() from fault_report()
could never return, as dump_core() never returns at the end of
smb_panic()
Autobuild-User: Andrew Tridgell <tridge@samba.org>
Autobuild-Date: Tue Mar 22 05:07:58 CET 2011 on sn-devel-104
Since the fix for bso#7836, the parent smbd is responsible for
maintaining an up-to-date printcap cache. It does this by forking a
child process to asynchronously fetch printcap data from CUPS.
When the child process exits after fetching all printcap data, the
parent smbd is sent SIGCHLD. This triggers smbd_sig_chld_handler() which
looks for the exited process PID on a "children" list.
Child smbd process PIDs are added to the "children" list to ensure
cleanup on unclean shutdown and log level change notification messages.
Printcap update process PIDs are not added to the list as they do not
maintain any state that requires cleanup, nor do they wait on tevent for
messages.
Autobuild-User: Volker Lendecke <vlendec@samba.org>
Autobuild-Date: Thu Feb 17 11:11:45 CET 2011 on sn-devel-104
Since commit 7022554, smbds share a printcap cache (printer_list.tdb),
therefore ordering of events between smbd processes is important when
updating printcap cache information. Consider the following two process
example:
1) smbd1 receives HUP or printcap cache time expiry
2) smbd1 checks whether pcap needs refresh, it does
3) smbd1 marks pcap as refreshed
4) smbd1 forks child1 to obtain cups printer info
5) smbd2 receives HUP or printcap cache time expiry
6) smbd2 checks whether pcap needs refresh, it does not (due to step 3)
7) smbd2 reloads printer shares prior to child1 completion (stale pcap)
8) child1 completion, pcap cache (printer_list.tdb) is updated by smbd1
9) smbd1 reloads printer shares based on new pcap information
In this case both smbd1 and smbd2 are reliant on the pcap update
performed on child1 completion.
The prior commit "reload shares after pcap cache fill" ensures that
smbd1 only reloads printer shares following pcap update, however smbd2
continues to present shares based on stale pcap data.
This commit addresses the above problem by driving pcap cache and
printer share updates from the parent smbd process.
1) smbd0 (parent) receives a HUP or printcap cache time expiry
2) smbd0 forks child0 to obtain cups printer info
3) child0 completion, pcap cache (printer_list.tdb) is updated by smbd0
4) smbd0 reloads printer shares
5) smbd0 notifies child smbds of pcap update via message_send_all()
6) child smbds read fresh pcap data and reload printer shares
This architecture has the additional advantage that only a single
process (the parent smbd) requests printer information from the printcap
backend.
Use time_mono in housekeeping functions As suggested by Björn Jacke.
Since commit eada8f8a, updates to the cups pcap cache are performed
asynchronously - cups_cache_reload() forks a child process to request
cups printer information and notify the parent smbd on completion.
Currently printer shares are reloaded immediately following the call to
cups_cache_reload(), this occurs prior to smbd receiving new cups pcap
information from the child process. Such behaviour can result in stale
print shares as outlined in bug 7836.
This fix ensures print shares are only reloaded after new pcap data has
been received.
Pair-Programmed-With: Lars Müller <lars@samba.org>
The problem here is that we cannot run lp_set_cmdline() (directly or
indirectly via the popt helpers) until load_case_tables() has been run.
However, load_case_tables does not have auto-initialisation, so we
must init it once, and once only.
Andrew Bartlett
This change improves the setup_logging() API so that callers which
wish to set up logging to stderr can simply ask for it, rather than
directly modify the dbf global variable.
Andrew Bartlett
This breaks the perfcol_onefs() build.
Tim, Steve, this use of smbd_server_fd is replacable by calls into
substitute.c. I don't have a onefs environment around to build a fix, so I've
decided to insert an #error, making it not compile. The fix should be pretty
obvious, you can get the socket data via "%I" and "%i" substitutions.
Reloading of the printers requires rpc services up and running! The
first call in reload_services will be skipped.
Signed-off-by: Simo Sorce <idra@samba.org>
The move to the parent makes it possible to use an internal rpc pipe
really early and as we migrated serveral parts of samba to rpc function
this is required. This should speed up the fork of a smbd a bit cause
the rpc services are already running.
We still have several problems here which aren't solved. We don't have a
dependency tree here. For example we have to make sure that the registry
is initialized before we can use the winreg pipe. The spoolss server
requires winreg, so we have to start winreg before we can start the
spoolss server. I'm sure there are more dependencies.
Signed-off-by: Simo Sorce <idra@samba.org>
It would be obvious to initialize this in smbd_init_globals(), but there the
messaging_context can't be initialized yet because we don't have smb.conf
loaded yet.
This shrinks include/includes.h.gch by the size of 7 MB and reduces build time
as follows:
ccache build w/o patch
real 4m21.529s
ccache build with patch
real 3m6.402s
pch build w/o patch
real 4m26.318s
pch build with patch
real 3m6.932s
Guenther
In the child, we fully re-open serverid.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.
The notify tdb files are opened at tconX time, which leads to one fcntl lock
for CLEAR_IF_FIRST detection per smbd. This opens the tdbs in the parent and
holds it, so that tdb_reopen_all correctly catches the CLEAR_IF_FIRST bit.
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.
This boolean option controls whether at exit time the server dumps a list of
files with debug level 0 that were still open for write. This is an
administrative aid to find the files that were potentially corrupt if the
network connection died.
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 reverts commit a6ae7a552f.
This fixes bug #7222 (All users have full rigths on all shares) (CVE-2010-0728).
(cherry picked from commit 1c9494c76c)
On unclean shutdown we can end up with stale entries in the brlock,
connections and locking db. Previously we would do the cleanup on
every unclean exit, but that can cause smbd to be completely
unavailable for several minutes when a large number of child smbd
processes exit.
This adds a rate limited cleanup of the databases, with the default
that cleanup happens at most every 20s
Only works on Linux kernels 2.6.26 and above. Grants CAP_KILL capability
to allow Linux threads under different euids to send signals to each other.
Jeremy.
This is a small performance optimization. Instead of opening the tdb
on every smb connection in the forked child process, we now open it in
the parent and share the fd.
This also reduces the total fd usage in the system.
This provides a compromise between stability and performance: gencache is a
persistent database these days that for performance reasons can not use tdb
transactions for all writes. This patch splits up gencache into gencache.tdb
and gencache_notrans.tdb. gencache_notrans is used with CLEAR_IF_FIRST, writes
to it don't use transactions. By default every 5 minutes and when a program
exits, all entries from _notrans.tdb are transferred to gencache.tdb in one
transaction.
Before 3.3, an smbcontrol debug message sent to the target "smbd" would
actually be sent to all running processes including nmbd and winbindd.
This behavior was changed in 3.3 so that the "smbd" target would only
send a message to the process found in smbd.pid, while the "all" target
would send a message to all processes.
The ability to set the debug level of all processes within a single
daemon, without specifying each pid is quite useful. This was implemented
in winbindd in 065760ed. This patch does the same thing for smbd.
Upon receiving a MSG_DEBUG the parent smbd will rebroadcast it to all of
its children.
The printing process has been added to the list of smbd child processes,
and we now always track the number of smbd children regardless of the
"max smbd processes" setting.
When we run out of file descriptors for some reason, every new
connection forks a child that immediately panics causing smbd to
coredump. This seems unnecessarily harsh; with this code change we
now catch that error and merely log a message about it and exit
without the core dump.
Signed-off-by: Tim Prouty <tprouty@samba.org>
This code path can't really happen anymore, because
launchd support was removed with commit e5a951325a.
But it's confusing to have that code there...
metze
This was uncovered when the MAX FD limit was hit, causing an instant core
and invoking error reporting. This fix causes SMBD to exit, but without
building a core.
This commit adds a configure argument which allows for setting MADV_PROTECT
in the madvise() API. With this enabled the kernel won't kill SMBD when
it's running low on memory.
We need to use CTDB_CONTROL_TCP_CLIENT instead of CTDB_CONTROL_TCP_ADD.
CTDB_CONTROL_TCP_CLIENT has support for 2 modes in newer ctdb versions:
- with struct ctdb_control_tcp it only supports ipv4.
- with struct ctdb_control_tcp_addr it supports ipv4 and ipv6.
You need new header files which defines struct ctdb_control_tcp_addr,
but at runtime it should be fine to work against older
ctdb versions (<= 1.0.68).
metze
version.h changes rather frequently. Since it is included via includes.h,
this means each C file will be a cache miss. This applies to the following
situations:
* When building a new package with a new Samba version
* building in a git branch after calling mkversion.sh
after a new commit (i.e. virtually always)
This patch improves the situation in the following way:
* remove inlude "version.h" from includes.h
* Use samba_version_string() instead of SAMBA_VERSION_STRING
in files that use no other macro from version.h instead of
SAMBA_VERSION_STRING.
* explicitly include "version.h" in those files that use more
macros from "version.h" than just SAMBA_VERSION_STRING.
Michael
Remove the code in memcache that does a TALLOC_FREE on stored pointers. That's a disaster waiting
to happen. If you're storing talloc'ed pointers, you can't know their lifecycle and they should
be deleted when their parent context is deleted, so freeing them at some arbitrary point later
will be a double-free.
Jeremy.
If the "socket address" parameter is a null string that is an invalid value for Samba 3.2 but valid for Samba 3.0.
Jeremy.
(This used to be commit c65726d418)
leaving panic or more appropriate action to callers.
This can for instance happen in a clustered setup, when
ctdb is not running. This allows for a more defined behaviour,
reducing chicken-egg-problems.
Michael
(This used to be commit 3b6541ff48)
We now open messages.tdb even before we do the become_daemon. become_daemon()
involves a fork and an immediate exit of the parent, thus the
parent_is_longlived argument must be set to false in this case. The parent is
not really long lived :-)
(This used to be commit 4f4781c6d1)
DMAPI session is precious resource maintained at kernel level. We open one of them and use across multiple smbd daemons
but once last of them exits, DMAPI session needs to be destroyed. There are some HSM implementations which fail to
shutdown when opened DMAPI sessions left. Ensure we shutdown our session when it is really not needed anymore.
This is what recommended by DMAPI specification anyway.
(This used to be commit a0cefd4400)
We need to inform ctdb about the client's TCP connection so that after a fail
over ctdbd can trigger the client to reconnect very quickly
(This used to be commit ddc989886d)
bind to a socket if we've already bound to one (this
prevents :
bind failed on port 445 socket_addr = 0.0.0.0.
Error = Address already in use
bind failed on port 139 socket_addr = 0.0.0.0.
Error = Address already in use
messages when trying to bind to an IPv4 address
when we've already bound to the IPv6 equivalent.
Jeremy.
(This used to be commit 3936de735a)
It hurts, but I think this global variable is necessary for transition, and it
has the potential to remove quite a few other global variables without messing
with APIs too much.
(This used to be commit c131d0dc52)
This is a more general API that caches data with a LRU scheme. See
include/cache.h. No comments yet, I'm still working on it. But Jeremy has given
me a hint in one of his checkins that he would like to make use of this now.
The idea is that we get rid of all our silly little caches and merge them all
into one cache that we can then very easily trim, for example even with a
smbcontrol message if someone decides memory is tight. The main user is the
stat cache, this patch also converts the getwd cache. More caches to come.
(This used to be commit 7a911b3571)
If mDNS is supported, attempt to register the first port we are
listening on for the _smb._tcp service. This provides more reliable
service discovery than NetBIOS browsing.
(This used to be commit 1e7241517d)
one horror (pstring_clean_name()) which will have to
remain until I've removed all pstrings from the client code.
Jeremy.
(This used to be commit 1ea3ac8014)
capability for large UNIX write if not signing and
recvfile set. Cope with large UNIX write length on
incoming processing. Stevef - we can now test 1-16Mb
writes from CIFFS.
Jeremy.
(This used to be commit 8cf78776b0)
to zero). If non-zero, writeX calls greater than this
value will be left in the socket buffer for later handling
with recvfile (or userspace equivalent). Definition of
recvfile for your system is left as an exercise for
the reader (I'm working on getting splice working :-).
Jeremy.
(This used to be commit 11c03b75dd)
Hi!
Can you check and push them?
Thanks,
Volker
From b488af5905e2dee12a1a72a3b40801ae5c26f24f Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@sernet.de>
Date: Sat, 27 Oct 2007 14:20:09 +0200
Subject: [PATCH] Fix some warnings and errors
(This used to be commit e17d3e10e8)
to struct sockaddr_storage in most places that matter (ie.
not the nmbd and NetBIOS lookups). This passes make test
on an IPv4 box, but I'll have to do more work/testing on
IPv6 enabled boxes. This should now give us a framework
for testing and finishing the IPv6 migration. It's at
the state where someone with a working IPv6 setup should
(theorecically) be able to type :
smbclient //ipv6-address/share
and have it work.
Jeremy.
(This used to be commit 98e154c312)
jra: POPT_ARG_VAL arguments need int values.
I assume there're more places like this
in the cmdline tools.
Please fix this properly, as my commit is just
a hack to get make test working again.
in samba4 we have a workaround for this see
smbd/server.c
metze
(This used to be commit 9cb1937fe8)
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 f35a266b3c)
IPv6 in winbindd, but moves most of the socket functions that were
wrongly in lib/util.c into lib/util_sock.c and provides generic
IPv4/6 independent versions of most things. Still lots of work
to do, but now I can see how I'll fix the access check code.
Nasty part that remains is the name resolution code which is
used to returning arrays of in_addr structs.
Jeremy.
(This used to be commit 3f6bd0e1ec)
This adds the two functions talloc_stackframe() and talloc_tos().
* When a new talloc stackframe is allocated with talloc_stackframe(), then
* the TALLOC_CTX returned with talloc_tos() is reset to that new
* frame. Whenever that stack frame is TALLOC_FREE()'ed, then the reverse
* happens: The previous talloc_tos() is restored.
*
* This API is designed to be robust in the sense that if someone forgets to
* TALLOC_FREE() a stackframe, then the next outer one correctly cleans up and
* resets the talloc_tos().
The original motivation for this patch was to get rid of the
sid_string_static & friends buffers. Explicitly passing talloc context
everywhere clutters code too much for my taste, so an implicit
talloc_tos() is introduced here. Many of these static buffers are
replaced by a single static pointer.
The intended use would thus be that low-level functions can rather
freely push stuff to talloc_tos, the upper layers clean up by freeing
the stackframe. The more of these stackframes are used and correctly
freed the more exact the memory cleanup happens.
This patch removes the main_loop_talloc_ctx, tmp_talloc_ctx and
lp_talloc_ctx (did I forget any?)
So, never do a
tmp_ctx = talloc_init("foo");
anymore, instead, use
tmp_ctx = talloc_stackframe()
:-)
Volker
(This used to be commit 6585ea2cb7)
smbd, nmbd and winbindd can be started with invalid options currently.
The first patch attached would be a possible solution.
It contains an exit if an invalid option has been used. The main problem
is, that existing setups with wrong options or missing arguments in start
scripts will break (which is the right behaviour from my point of view).
metze
(This used to be commit 8532e3182a)
systems. Rather than trying to fix this, it's much better just to
remove the code, as it serves no purpose at all (the message that is
generated is ignored by smbd).
This sort of parsing should really be done by PIDL generated code.
(This used to be commit 22e8404cef)
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 15553d6327)
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 7e39d77c1f)
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 eaefd00563)
and connections_forall. This centralizes all the routines that did individual
tdb_open("connections.tdb") and direct tdb_traverse.
Volker
(This used to be commit e43e94cda1)
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 0ad4b1226c)
sockets to listen on a little, because in the launchd case these
are provided for us. We also add an idle timeout so that a daemon
can exit after a period of inactivity.
(This used to be commit fc8589a337)
not just an NTLMSSP - grr. This complicates the re-use of
common client and server code but I think I've got it right.
Not turned on of valgrinded yet, but you can see it start
to take shape !
Jeremy.
(This used to be commit 60fc9c0aed)
one typo, one to make sure that time initialization
is done before modules that depend on it (printer
initialization).
Jeremy.
(This used to be commit 6df32b4a6a)