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All printer inventory updates are currently done via
delete_and_reload_printers(), which handles registry.tdb updates for
added or removed printers, AD printer unpublishing on removal, as well
as share service creation and deletion.
This change splits this functionality into two functions such that
per-client smbd processes do not perform registry.tdb updates or printer
unpublishing. This is now only performed by the process that performs
the printcap cache update.
This change is similar to ac6604868d from
the 3.6 branch.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
All print list updates are now done via pcap_cache_replace(), which can
call into the print_list code directly.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This will allow in future for a single atomic printer_list.tdb update.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
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>
The printcap update procedure involves the background printer process
obtaining the printcap information from the printing backend, writing
this to printer_list.tdb, and then notifying all smbd processes of the
new list. The processes then all attempt to simultaneously traverse
printer_list.tdb, in order to update their local share lists.
With a large number of printers, and a large number of per-client smbd
processes, this traversal results in significant lock contention, mostly
due to the fact that the traversal is unnecessarily done with an
exclusive (write) lock on the printer_list.tdb database.
This commit changes the share update code path to perform a read-only
traversal.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10652
Reported-by: Alex K <korobkin+samba@gmail.com>
Reported-by: Franz Pförtsch <franz.pfoertsch@brose.com>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The incorrect (system) jobid is currently passed to the job deletion
function.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10612
Reported-by: Franz Pförtsch <franz.pfoertsch@brose.com>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
With the new messaging, if we don't do this, we'll leave sockets around. I'm
sure we will not catch everything, so a periodic cleanup will be required.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
https://bugzilla.samba.org/show_bug.cgi?id=9993
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Feb 25 13:19:37 CET 2014 on sn-devel-104
Coverity-Id: 710708
Signed-off-by: Poornima Gurusiddaiah <pgurusid@redhat.com>
Reviewed-by: Ira Cooper <ira@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
After the fork, the code created a fresh messaging_context before doing the
reinit_after_fork. This means to have two initialized messaging contexts in
that process. This patch aligns spoolssd with lsad.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Receiving a MSG_PRINTER_DRVUPGRADE causes
smbd to iterate over all printers looking
for ones that uses the driver. This is a very
expensive operation requiring a read of all
registry printer parameters.
On a system with a large number of printers,
this causes the clients to timeout (smbd
can take longer than 60 seconds to respond).
This patch fixes the problem by forwarding
the MSG_PRINTER_DRVUPGRADE to the background
lpq queue updater process and allowing it to
take care of the updating of the changeid
in the registry, allowing the smbd connected
to the client to return to processing requests
immediately.
https://bugzilla.samba.org/show_bug.cgi?id=9942
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Feb 18 17:48:30 CET 2014 on sn-devel-104
This is in preparation to support handing flags to backends,
in particular activating read only record support for ctdb
databases. For a start, this does nothing but adding the
parameter, and all databases use DBWRAP_FLAG_NONE.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
sys_adminlog() is another syslog wrapper. Use DEBUG(0, ...) instead,
which offers the same syslog(LOG_ERR) behaviour.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
print_access_check() currently returns a bool based on whether access is
granted or denied. Errno is set on failure, but none of the callers use
it.
This change converts print_access_check() to return a WERROR.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Print jobs have multiple identifiers: the regular spoolss jobid, which
is allocated by spoolss on job submission, and the system jobid, which
is assigned by the printing back-end.
Currently these identifiers are incorrectly mixed in print job queue
tracking. Fix this by ensuring that only the system jobid is stored in
the print queue state structure.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10271
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Mon Nov 18 18:03:41 CET 2013 on sn-devel-104
Print job notifications currently carry the system print job identifier
from the queue structure. Instead, the spoolss job identifier should be
resolved and returned.
Print clients can use notification job-ids in subsequent spoolss SetJob
requests. Returning an incorrect identifier can result in the failure of
such requests, e.g. spoolss_SetJob(SPOOLSS_JOB_CONTROL_DELETE).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10271
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Samba currently always responds to GetPrinter(level = 7) requests with
DSPRINT_UNPUBLISH, regardless of the AD publish status tracked via the
PRINTER_ATTRIBUTE_PUBLISHED flag. This is due to erroneous "objectGUID"
unmarshalling in is_printer_published().
This change splits "objectGUID" retrieval into a separate function, and
adds a pull_reg_sz() call to correctly unmarshall the GUID.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Currently nt_printer_publish(DSPRINT_UNPUBLISH) flips (via xor) the
info2->attributes PRINTER_ATTRIBUTE_PUBLISHED flag, rather than
explicitly clearing it.
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Check for ads_find_machine_acct() errors, to ensure a NULL LDAPMessage
pointer doesn't get passed to ldap_get_dn().
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-By: Günther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Thu Apr 25 19:01:55 CEST 2013 on sn-devel-104
This allows you to convert printing tdb's which are in e.g. in latin1 to
convert to UTF-8 and import them into the registry.
Reviewed-by: Günther Deschner <gd@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Wed Mar 6 01:16:34 CET 2013 on sn-devel-104
