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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.
(I based it on the text in MS-SMB2, silly me :-). Fix it so incoming sequence numbers
can range over the entire allowable bitmap range. This fixes a repeatable
disconnect against Win7.
Jeremy.
Parts of the Samba RPC client and server code misinterpret authenticated
packets.
DCE authenticated packets actually look like this :
+--------------------------+
|header |
| ... frag_len (packet len)|
| ... auth_len |
+--------------------------+
| |
| Data payload |
... ....
| |
+--------------------------+
| |
| auth_pad_len bytes |
+--------------------------+
| |
| Auth footer |
| auth_pad_len value |
+--------------------------+
| |
| Auth payload |
| (auth_len bytes long) |
+--------------------------+
That's right. The pad bytes come *before* the footer specifying how many pad
bytes there are. In order to read this you must seek to the end of the packet
and subtract the auth_len (in the packet header) and the auth footer length (a
known value).
The client and server code gets this right (mostly) in 3.0.x -> 3.4.x so long
as the pad alignment is on an 8 byte boundary (there are some special cases in
the code for this).
Tridge discovered there are some (DRS replication) cases where on 64-bit
machines where the pad alignment is on a 16-byte boundary. This breaks the
existing S3 hand-optimized rpc code.
This patch removes all the special cases in client and server code, and allows
the pad alignment for generated packets to be specified by changing a constant
in include/local.h (this doesn't affect received packets, the new code always
handles them correctly whatever pad alignment is used).
This patch also works correctly with rpcclient using sign+seal from
the 3.4.x and 3.3.x builds (testing with 3.0.x and 3.2.x to follow)
so even as a server it should still work with older libsmbclient and
winbindd code.
Jeremy
this allows us to experiment with ensuring the tdb hash
size for our open files and locking db are appropriately
sized. Make the hash size larger by default (10007 instead
of 1049) and make the locking db hash size the same as the
open file db hash size.
Jeremy.
(This used to be commit e7225f7e81)
to be set in local.h. Change from the default (131) to
another prime (1049). Should this be an smb.conf tunable parameter
based on the number of open file descriptors available ?
If so what scaling factor ? More tests to follow.
Jeremy.
(This used to be commit 6a902ec49f)
"allocation roundup size", by default set as 1Mb. From
advice by BlueArc about Windows client behaviour. VC++
people can set this to zero to turn it off.
Jeremy.
(This used to be commit 833ca10177)
idea, and aparently improved performance in some circumstances, but it
breaks the VC++ compiler :-(. Not cool. Fix bug #2146.
Jeremy.
(This used to be commit b9f147634d)
the unix domain sockets used by winbindd (also solves FD_SETSIZE problem
in winbindd to boot !). Adds a "last_access" field to winbindd connections,
and will close the oldest idle connection once the number of open connections
goes over WINBINDD_MAX_SIMULTANEOUS_CLIENTS (defined in local.h as 200
currently).
Jeremy.
(This used to be commit 7a586552a3)
mangling implementation, selectable using "mangling method = " in smb.conf
It also tidies the interface a little, although it is still nasty.
(This used to be commit be23d87a17)
This allows embedded systems to compile out the higher debug
levels. It should gain speed as well as reducing the code
size. Setting it to 1 saves about 300k of code on my system.
(This used to be commit f34cac3b31)
the pam password change code to ensure that existing and working password
chat scripts don't break with 2.2.1. PAM password changing has to be explicitly
requested.
Allowed wildcards in pam password change matching (matches password chat
script matching). Had to add const (sorry Tim :-) to ms_fnmatch() to
stop warnings. Don't worry - the const changes are isolated and don't
cause any other warnings :-).
Jeremy.
(This used to be commit 47b4d82536)
- removes SMB_ALIGNMENT. That macro caused all sorts of problems with
getting unicode aligned right in sub-protocols (such as SMBtrans and
SMBtrans2). I believe the performance reasons for having
SMB_ALIGNMENT has gone away with the new variants of the SMB
protocol anyway, as newer commands tend to have their own internal
alignment.
- fix the locations where we set smb_flg2 to absolute values. We must
never do this if we want a hope of coping with unicode.
- add initial support for unicode on the wire in smbd. Currently
enabled using SMBD_USE_UNICODE environment variable.
(This used to be commit b98b1435e9)
this means "nmblookup -S" now always works, even with broken servers
the database stores all unexpected replies and these can be accessed
by any client.
while doing this I cleaned up a couple of functions, and put in place
a better trn_id generator. in most places the code got quite a bit
simpler due to the addition of simple helper functions.
I haven't yet put the code in to take advantage of this for pdc
replies - that will be next. Jeremys pdc finding code will then work :)
(This used to be commit 280e6359d3)
include/smb.h:
param/loadparm.c: Made GUEST_SESSSETUP run time selectable. Horror of horrors :-).
printing/printing.c: Added J.F.'s latest fix.
rpc_parse/parse_misc.c:
parse_reg.c:
rpcclient/cmd_reg.c:
rpcclient/display.c: SGI compiler signed/unsigned issues.
smbd/reply.c: Made GUEST_SESSSETUP run time selectable. Horror of horrors :-).
utils/testparm.c: Added extra test.
Jeremy.
(This used to be commit 9668a5ef50)
on by default on OSes that support it, given the network IO pattern
that Samba uses. He doesn't think it will cause problems.
(This used to be commit 15016aa024)
MS client doesn't respond to a oplock break request then we might try
resending the request.
This morning Sues Win95 machine had this problem (thus forcing me to
do something about it!). When starting winword her box refused to
answer an oplock break request. I have added code to resend the oplock
break request up to 3 times at 10 second intervals before killing the
socket.
of course, as soon as I did this her box started to behave again so I
haven't been able to tell if this fix actually works, but it can't be
worse than dropping the socket immediately.
(This used to be commit a1c4d8351b)
Sets up the files array correctly - limited by the smb.conf parameter
and by the max fd's per process as found by getrlimit().
Jeremy.
(This used to be commit eca24bd243)
