v3->v4:
- Drop the patch 3 on vfio communication (postponed).
- Change names from rte_eal_mp_* -> rte_mp_* as suggested by Thomas.
- Add nb_sent and nb_received in struct rte_mp_reply.
- Standardize the return val of sendmsg, request, reply: 0 on sucess,
(-1) on failure.
- If we found an peer error when we send msg in primary, we try to
remove the secondary socket; as there is no sync mechanism there
(cannot do flock like regular file for socket file), we use a more
complex socket name (with tsc in it).
- Some other small changes.
v2->v3:
- Add pre-check for each APIs.
- Remove the limitation of 8 secondary processes by: discard original
register/unregister mechanism of secondary process, instead, primary
discoveries secondary processes by looking up the folder for regex match.
- Previous implementation use two sockets for msg and request, this version
just uses one socket. And receive all kinds of messages in mp thread.
v1->v2: (Address comments from Anatoly and Konstantin)
- Use datagram unix socket to supersede stream unix socket + epoll.
- Change the secondary add/del mechanism as now we use connection-less
channel.
- Add mp_mutex_action to sync action register/unregister/reference.
- Limit max length of action name to 64B.
- New APIs for synchronous communication: rte_eal_mp_request/rte_eal_mp_reply.
- Formalize the errno handle.
- Some other small issues.
This patchset adds a generic channel for multi-process (primary/secondary)
communication.
Patch 1: addess the purpose and howto;
Patch 2: add a syncrhonous way for the requests which need a immediate response.
Jianfeng Tan (2):
eal: add synchronous multi-process communication
vfio: use the generic multi-process channel
doc/guides/rel_notes/release_18_02.rst | 2 +
lib/librte_eal/common/eal_common_proc.c | 254 +++++++++++++--
lib/librte_eal/common/include/rte_eal.h | 58 +++-
lib/librte_eal/linuxapp/eal/eal.c | 14 +-
lib/librte_eal/linuxapp/eal/eal_vfio.c | 169 ++++------
lib/librte_eal/linuxapp/eal/eal_vfio.h | 15 +-
lib/librte_eal/linuxapp/eal/eal_vfio_mp_sync.c | 410 ++++---------------------
lib/librte_eal/rte_eal_version.map | 2 +
8 files changed, 429 insertions(+), 495 deletions(-)
--
2.7.4
