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This removes quite a bit of code. All reasonable systems have /dev/urandom
these days. Linux, Solaris and the BSDs do. In case we find a system
without /dev/urandom, we will have to go hunting in other libraries.
The main reason for this is speed: On Ubuntu 14.04 doing direct reads from
/dev/urandom is 2-3 times faster than our md4 based code. On virtualized
FreeBSD 10 the difference is even larger.
My first approach was to use fopen/fread. It was even faster, but less
than twice as fast. So I thought we could save the additional complexity
when having to deal with throwing away buffers when forking and the
additional memory footprint per process.
With this simple generate_random_buffer it will be easier to adapt new
syscalls to get randomness.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Oct 13 04:25:39 CEST 2015 on sn-devel-104
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11180
The issue has been found with nss_wrapper debug output running:
samba4.ntvfs.cifs.krb5.base.lock
In the case here, we fork a child and close the fd without resetting
the pipe fd variable. Then the fd was used to open the nss_wrapper
hosts file which got the same fd. We forked again in the process model
called close() on the re-used fd (of the pipe variable) again without
nss_wrapper noticing. Now Samba opened the secrets tdb and got
the same fd as nss_wrapper was using for the hosts file and next
nss_wrapper tried to parse a TDB ...
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
We replace this with a pipe between parent and child, and then watch
for a read event in the parent to indicate that the child has gone away.
The removal of signal(SIGCHLD, SIG_IGN) requires us to then call
waitpid(). We can't do that in a main loop as we want to get the exit
status to the legitimate waitpid calls in routines like
samba_runcmd_*().
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
this also removes the event_context parameter from process model
initialisation. It isn't needed, and is confusing when a process model
init can be called from more than one place, possibly with different
event contexts.
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
this converts all callers that use the Samba4 loadparm lp_ calling
convention to use the lpcfg_ prefix.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
This is needed to remove samba specifc symbols from the bundled
ldb, in order to get the ABI right.
metze
Signed-off-by: Andreas Schneider <asn@samba.org>
multiple event contexts
It is NEVER valid to free an event context that anybody else may have
a reference to, and never normally valid to have two 'live' at once.
We must instead call tevent_re_initialise() to wipe clean an existing
pointer.
Andrew Bartlett
We need to free the lp_ctx after we free the event context, otherwise
the teardown code in the notify backend dies when it tries to use the
iconv_convenience ptr
Fixes bug 7053
Previously we relied on process groups and SIGTERM to ensure that
child tasks died in the standard process model when the parent task
died. This doesn't work when the server is run in interactive mode, as
in that case we don't call become_daemon() and don't get a separate
process group.
The fix is to have a pipe held open by the parent server process, and
inherited by child tasks. If the parent exits then the write side of
the pipe is implicitly closed, which causes an event in the child
tasks that causes them to exit
specific debug function.
By default do not debug, this is the most appropriate action for a library
as we cannot assume what stderr is use for in the main app.
The main app is responsible to set ev_debug_stderr if they so desire.
(This used to be commit e566a2f308)
To use, run 'smbd -M prefork'
By default, only the smb service is preforked. 4 children are
created, and all listen for new connections. The Linux Kernel 'wake
one' behaviour should ensure that only one is given the oportunity to
accept. We need to look into the ideal number of worker children, as
well as load balancing behaviours.
To change, set:
prefork children : smb = 6
valid service names (smb in this example) match those in 'server services'.
Andrew Bartlett and David Disseldorp
(This used to be commit 35313c0aa3)
uint32_t server_id
to
struct server_id server_id;
which allows a server ID to have an node number. The node number will
be zero in non-clustered case. This is the most basic hook needed for
clustering, and ctdb.
(This used to be commit 2365abaa99)
This merges Samba4 with lorikeet-heimdal, which itself has been
tracking Heimdal CVS for the past couple of weeks.
This is such a big change because Heimdal reorganised it's internal
structures, with the mechglue merge, and because many of our 'wishes' have been granted: we now have DCE_STYLE GSSAPI, send_to_kdc hooks and many other features merged into the mainline code. We have adapted to upstream's choice of API in these cases.
In gensec_gssapi and gensec_krb5, we either expect a valid PAC, or NO
PAC. This matches windows behavour. We also have an option to
require the PAC to be present (which allows us to automate the testing
of this code).
This also includes a restructure of how the kerberos dependencies are
handled, due to the fallout of the merge.
Andrew Bartlett
(This used to be commit 4826f17351)
- the process module subsystem should not know about smb_server.h
- the smb_server module should not know about process models
metze
(This used to be commit bac95bb8f4)
- add set_title hook to the process models
- use setproctitle library in process_model standard if available
- the the title for the task servers and on connections
metze
(This used to be commit 526f20bbec)
good, as it is probably a resource constraint, so if we just try again
we will spin (as the incoming socket will still be readable). Using a
sleep(1) solves this by throtting smbd until the resource constraint
goes away.
if the resource constraint doesn't go away, then at least smbd won't
be spinning chewing cpu
(This used to be commit 7a5a9da477)
