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Currently, automatic printer share updates are handled in the following
way:
- Background printer process (BPP) forked on startup
- Parent smbd and per-client children await MSG_PRINTER_PCAP messages
- BPP periodically polls the printing backend for printcap data
- printcap data written to printer_list.tdb
- MSG_PRINTER_PCAP sent to all smbd processes following update
- smbd processes all read the latest printer_list.tdb data, and update
their share listings
This procedure is not scalable, as all smbd processes hit
printer_list.tdb in parallel, resulting in a large spike in CPU usage.
This change sees smbd processes only update their printer share lists
only when a client asks for this information, e.g. via NetShareEnum or
EnumPrinters.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Suggested-by: Volker Lendecke <vl@samba.org>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Richard Sharpe <realrichardsharpe@gmail.com>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Apr 22 22:19:18 CEST 2014 on sn-devel-104
Added routines count_share_conns() and share_conn_fn() to count
connections to a share.
Signed-off-by: Shekhar Amlekar <samlekar@in.ibm.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
Substitution isn't really necessary for this parameter.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
The current code simply denies changing the csc policy through RPC
calls. Change that to allow changing the csc policy and call the 'change
share command' when a SetInfo RPC call changes the setting.
Signed-off-by: Shekhar Amlekar <samlekar@in.ibm.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
The current code for determining the number of open files iterates
over the session list and for each session it traverses the locking
tdb to get the open files. This scales badly for a large server
with many sessions and open files. Instead, get the list of
sessions first, and then determine the number of open files on all
sessions in a single traversal of locking tdb.
Signed-off-by: Shekhar Amlekar <samlekar@in.ibm.com>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Jan 18 01:11:32 CET 2014 on sn-devel-104
Introduce helper functions for counting the number of open files on an
array of sessions.
Signed-off-by: Shekhar Amlekar <samlekar@in.ibm.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Just allocate the return value directly. Makes iteration of open files much easier.
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
instead of using list_sessions(), use find_sessions() that
builds the list of only the sessions of interest.
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Fri Sep 6 15:29:55 CEST 2013 on sn-devel-104
Added routines to compute share connections and used it
in srvsvc NetShareEnum call.
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Richard Sharpe <realrichardsharpe@gmail.com>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Aug 13 07:42:23 CEST 2013 on sn-devel-104
Before doing the (potentially) costly enumerations,
check if the user has necessary privileges first
Signed-off-by: Shekhar Amlekar <samlekar@in.ibm.com>
Reviewed-by: Christian Ambach <ambi@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Christian Ambach <ambi@samba.org>
Autobuild-Date(master): Tue May 14 16:22:24 CEST 2013 on sn-devel-104
The python bindings do not want the current working directory changed
during operations, so we provide two functions, one providing the
original behaviour, and other providing the python bindings with just
the memory allocation and initilisation stuff.
Andrew Bartlett
Reviewed-by: Jeremy Allison <jra@samba.org>
The relevant records are not written to connections.tdb since commit
a781b78417b6d7b875230dd2edcb932445aa4197
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
This fixes up an error introduced by c8ade07760ae0ccfdf2d875c9f3027926e62321b.
Andrew Bartlett
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Oct 11 07:53:36 CEST 2012 on sn-devel-104
This makes it clear which context the returned SD is allocated on, as
a number of callers do not want it on talloc_tos().
As the ACL transformation allocates and then no longer needs a great
deal of memory, a talloc_stackframe() call is used to contain the
memory that is not returned further up the stack.
Andrew Bartlett
They use talloc_tos() internally: hoist that up to the callers, some
of whom don't want to us talloc_tos().
A simple patch, but hits a lot of files.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This brings this structure one step closer to the struct auth_session_info.
A few SMB_ASSERT calls are added in some key places to ensure that
this pointer is initialised, to make tracing any bugs here easier in
future.
NOTE: Many of the users of this structure should be reviewed, as unix
and NT access checks are mixed in a way that should just be done using
the NT ACL. This patch has not changed this behaviour however.
Andrew Bartlett
Signed-off-by: Andrew Tridgell <tridge@samba.org>
