Mikolaj Golub 5d69ed535e For memsync replication, hio_countdown is used not only as an ... indication when a request can be moved to done queue, but also for detecting the current state of memsync request. This approach has problems, e.g. leaking a request if memsynk ack from the secondary failed, or racy usage of write_complete, which should be called only once per write request, but for memsync can be entered by local_send_thread and ggate_send_thread simultaneously. So the following approach is implemented instead: 1) Use hio_countdown only for counting components we waiting to complete, i.e. initially it is always 2 for any replication mode. 2) To distinguish between "memsync ack" and "memsync fin" responses from the secondary, add and use hio_memsyncacked field. 3) write_complete() in component threads is called only before releasing hio_countdown (i.e. before the hio may be returned to the done queue). 4) Add and use hio_writecount refcounter to detect when write_complete() can be called in memsync case. Reported by: Pete French petefrench ingresso.co.uk Tested by: Pete French petefrench ingresso.co.uk MFC after: 2 weeks		2013-12-10 19:56:26 +00:00
..
activemap.c	Spelling fixes for sbin/	2012-01-07 16:09:33 +00:00
activemap.h
control.c	Make hastctl list command output current queue sizes.	2013-10-26 08:38:21 +00:00
control.h	Rename HASTCTL_ defines, which are used for conversion between main	2011-04-26 19:38:30 +00:00
crc32.c	Allow to checksum on-the-wire data using either CRC32 or SHA256.	2011-03-06 22:56:14 +00:00
crc32.h	Allow to checksum on-the-wire data using either CRC32 or SHA256.	2011-03-06 22:56:14 +00:00
ebuf.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
ebuf.h
event.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
event.h	Forgot to add event.c and event.h in r212038.	2010-08-31 09:38:43 +00:00
hast_checksum.c	Simplify code by changing functions types from int to avoid, as the functions	2011-12-15 22:03:17 +00:00
hast_checksum.h	Allow to checksum on-the-wire data using either CRC32 or SHA256.	2011-03-06 22:56:14 +00:00
hast_compression.c	Spelling fixes for sbin/	2012-01-07 16:09:33 +00:00
hast_compression.h	Allow to compress on-the-wire data using two algorithms:	2011-03-06 23:09:33 +00:00
hast_proto.c	- Add support for 'memsync' mode. This is the fastest replication mode that's	2013-02-17 21:12:34 +00:00
hast_proto.h	Remove hast_proto_recv(). It was used only in one place, where	2011-04-17 16:18:45 +00:00
hast.conf.5	- Add support for 'memsync' mode. This is the fastest replication mode that's	2013-02-17 21:12:34 +00:00
hast.h	Make hastctl list command output current queue sizes.	2013-10-26 08:38:21 +00:00
hastd.8	Correct alignment.	2013-11-03 19:02:18 +00:00
hastd.c	- Add support for 'memsync' mode. This is the fastest replication mode that's	2013-02-17 21:12:34 +00:00
hastd.h	Add function to assert that the only descriptors we have open are the ones	2011-01-28 21:56:47 +00:00
hooks.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
hooks.h	hook_check() is now only used to report about long-running hooks, so the	2010-10-04 21:43:06 +00:00
lzf.c	Allow to compress on-the-wire data using two algorithms:	2011-03-06 23:09:33 +00:00
lzf.h	Spelling fixes for sbin/	2012-01-07 16:09:33 +00:00
Makefile	Get rid of libl dependency. We needed it only to provide yywrap. But	2013-05-11 09:51:44 +00:00
metadata.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
metadata.h
nv.c	Fix typo.	2012-03-23 20:18:48 +00:00
nv.h	Add nv_assert() which allows to assert that the given name exists.	2011-01-22 22:38:18 +00:00
parse.y	Improve compatibility with old flex and fix build with GCC.	2013-05-22 17:47:45 +00:00
pjdlog.c	Ensure that pjdlog functions don't modify errno.	2011-09-27 06:43:51 +00:00
pjdlog.h	Revert r228695. We use __func__ here as a format to distinguish between	2012-11-05 00:38:14 +00:00
primary.c	For memsync replication, hio_countdown is used not only as an	2013-12-10 19:56:26 +00:00
proto_common.c	Check if there is cmsg at all.	2012-07-01 16:26:07 +00:00
proto_impl.h	The proto API is a general purpose API, so don't use 'hast' in structures or	2011-03-22 16:21:11 +00:00
proto_socketpair.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
proto_tcp.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
proto_uds.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
proto.c	For functions that return -1 on failure check exactly for -1 and not for	2012-01-10 22:39:07 +00:00
proto.h	In hast.conf we define the other node's address in 'remote' variable.	2011-03-21 08:54:59 +00:00
rangelock.c	Nice range comparison.	2012-02-11 16:41:52 +00:00
rangelock.h
refcnt.h	Don't let hastd use C11 atomics.	2013-06-29 20:13:39 +00:00
secondary.c	Make hastctl list command output current queue sizes.	2013-10-26 08:38:21 +00:00
subr.c	Change the cap_rights_t type from uint64_t to a structure that we can extend	2013-09-05 00:09:56 +00:00
subr.h	Constify argument.	2012-01-06 12:27:17 +00:00
synch.h	Revert: r236909	2012-06-11 20:27:52 +00:00
token.l	Improve compatibility with old flex and fix build with GCC.	2013-05-22 17:47:45 +00:00