This is obviously incomplete. I have code on top of this,
not really working yet, with a loop on transferred flows,
and an implementation matching passt-repair, requesting to
enable/disable the TCP_REPAIR option as needed, as well as
setting/receiving sequences.
I'm sending this for early review/rework/rewrite/whatever.
What's here should all be tested and working.
Adding:
{ &flow_first_free, sizeof(flow_first_free) },
{ flowtab, sizeof(flowtab) },
to data version 1 in 6/7 will properly transfer those sections.
Declaring functions and assigning pointers such as:
{ flow_migrate_source_pre, NULL },
{ flow_migrate_source_post, NULL },
{ flow_migrate_target_post_v1, NULL },
also executes them. The passt-repair helper in 7/7 is (lightly)
tested against a stand-alone source/target implementation which
I'll share in a bit.
Stefano Brivio (7):
icmp, udp: Pad time_t timestamp to 64-bit to ease state migration
flow, flow_table: Pad flow table entries to 128 bytes, hash entries to
32 bits
tcp_conn: Avoid 7-bit hole in struct tcp_splice_conn
flow_table: Use size in extern declaration for flowtab
util: Add read_remainder() and read_all_buf()
Introduce facilities for guest migration on top of vhost-user
infrastructure
Introduce passt-repair
Makefile | 22 +++--
flow.h | 18 ++--
flow_table.h | 15 ++-
icmp_flow.h | 6 +-
migrate.c | 259 +++++++++++++++++++++++++++++++++++++++++++++++++
migrate.h | 90 +++++++++++++++++
passt-repair.c | 111 +++++++++++++++++++++
passt.c | 2 +-
tcp_conn.h | 2 +-
udp_flow.h | 6 +-
util.c | 70 +++++++++++++
util.h | 2 +
vu_common.c | 122 +++++++++++++++--------
vu_common.h | 2 +-
14 files changed, 662 insertions(+), 65 deletions(-)
create mode 100644 migrate.c
create mode 100644 migrate.h
create mode 100644 passt-repair.c
--
2.43.0