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72 commits

Author SHA1 Message Date
Quanah Gibson-Mount
788e9592ba Happy New Year! 2022-01-07 18:40:00 +00:00
Ondřej Kuzník
6cc6ec2f72 ITS#9600 Do not hold locks while calling into back-monitor 2021-10-05 11:05:25 +01:00
Ondřej Kuzník
e9dfb7d21d ITS#9600 Rework monitor entry management 
Connection entries are now persistent and can be addressed, preparing
the ground so we can process modify operations on individual entries.
 2021-08-13 10:57:14 +01:00
Ondřej Kuzník
1ca559668f ITS#9599 Add latency tracking 2021-08-13 10:57:14 +01:00
Ondřej Kuzník
ddc9430727 ITS#9598 Per OID restrictions 2021-08-13 10:57:14 +01:00
Ondřej Kuzník
0190f18b4c ITS#9598 Introduce backend-restricted selection 2021-08-13 10:57:14 +01:00
Ondřej Kuzník
7173e4726e ITS#9598 Factor out upstream checking 2021-08-13 10:57:13 +01:00
Ondřej Kuzník
8b24104d1a ITS#9624 Read state while holding relevant mutex, cache if needed 2021-08-04 15:30:36 +00:00
Ondřej Kuzník
8e4d7ffe79 ITS#8747 Remove c_private from LloadConnection 2021-05-10 18:49:13 +00:00
Ondřej Kuzník
1cb65102ce ITS#8747 Keep an explicit backend pointer 2021-05-10 18:49:13 +00:00
Ondřej Kuzník
3802fa9217 ITS#8747 Fix lloadd builds --without-tls 2021-05-10 18:49:13 +00:00
Ondřej Kuzník
e36d1e31c5 ITS#9001 manual changes 2021-03-30 15:46:40 +01:00
Quanah Gibson-Mount
efaf9a4a17 Happy New Year! 2021-01-11 19:25:53 +00:00
Ondřej Kuzník
1f6d8611a3 Implement read throttling when writes backlog 
Reject operations in such a case with LDAP_BUSY. If read_event feature
is on, just stop reading from the connection. However this could still
result in deadlocks in reasonable situations. Need to figure out better
ways to make it safe and still protect ourselves.
 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
68b163fca9 Introduce mutex checks 
Switched off unless thread debugging is on, but still useful for static
analysis.
 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
62a806b243 Thread error checking 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
58d66a3946 Fix race between unlinking a client and processing incoming data 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
b49f51879f Implement client pending operation limits 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
f832024e90 Straighten up client pending op tracking 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
dc1961cb15 Epoch based memory reclamation 
Similar to the algorithm presented in
https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-579.pdf

Not completely lock-free at the moment. Also the problems with epoch
based memory reclamation are still present - a thread actively observing
an epoch getting stuck will prevent LloadConnections and LloadOperations
being freed, potentially running out of memory.
 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
25a4d684fc Permit lloadd to share slapd TLS context 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
3bd2d7483e Reuse connection_walk for client matters 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
b4f43ed8e1 Refactor backend reset 
Reuse the connection walking facility in timeout management.
 2020-11-17 17:58:15 +00:00
Ondřej Kuzník
edfb3d73d6 Fix operation status tracking. 
An operation is rejected iff it has to be dropped before we can find an
upstream for it (unless we handle it ourselves, that is). At that point
it is failed unless completed successfully.

This makes a difference for multi-stage binds which alternate between
'failed' (we are waiting on a server response) and 'completed' (server
did what we asked them to, waiting on client to continue).
 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
7f22bac4ac Introduce a new connection status - gentle shutdown 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
bea9bfb33d Move op counting to operation_init 2020-11-17 17:58:14 +00:00
Nadezhda Ivanova
2d33032504 Lload cn=monitor initial implementation 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
2ba833680f Operation abandon related fixes 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
66f06f3fa9 Initial extension to upstream selection 2020-11-17 17:58:14 +00:00
Nadezhda Ivanova
8bc7650a7c Clean ups and renames to coexist with slapd 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
ea83627929 request_abandon RFC4511 conformance 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
0cfd4fca4d Make timeouts common and redo connection read timeouts 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
1b46f86627 Client TLS support 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
abab7e46ad Move client related functions to client.c 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
f27517af95 Rename bind handlers 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
b801ca17cb Rename macros and symbols to lloadd 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
11f474385a Exop support 
At the moment, no exops are processed internally, all are passed on
unchanged.
 2020-11-17 17:58:14 +00:00
Ondřej Kuzník
0b3531066d Refactor operation_send_reject 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
8d93e0baa0 Unify connection locking and I/O 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
16010e5e16 More logging improvements 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
7b7f9724c4 Avoid a deadlock with client 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
7046444327 Do not read on the last iteration. 
When the pdu processing limit is hit, we still attempt to read another
PDU. If we succeed, the ber_get_next call in the read callback will
abort since a full PDU is already present.
 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
65def94380 More logging improvements 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
37cff37305 Manage connection refcnt better 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
05f2ac2583 Unify logging output 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
5b1ad43178 Handle upstream connection shutdown properly 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
495dfa69a2 Split client/upstream PDU size limits 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
26f721510a Improve logging 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
3f5dee0b79 Keep a list of active clients for shutdown purposes. 
Potentially for timeout detection purposes in the future.
 2020-11-17 17:55:46 +00:00
Ondřej Kuzník
f4afc06920 Tweak connection error logging. 
Do not log when receiving the last bytes on a connection. Log failed
writes.
 2020-11-17 17:55:46 +00:00