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libceph: introduce connection modes and ms_mode option

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msgr2 supports two connection modes: crc (plain) and secure (on-wire
encryption).  Connection mode is picked by server based on input from
client.

Introduce ms_mode option:

  ms_mode=legacy        - msgr1 (default)
  ms_mode=crc           - crc mode, if denied fail
  ms_mode=secure        - secure mode, if denied fail
  ms_mode=prefer-crc    - crc mode, if denied agree to secure mode
  ms_mode=prefer-secure - secure mode, if denied agree to crc mode

ms_mode affects all connections, we don't separate connections to mons
like it's done in userspace with ms_client_mode vs ms_mon_client_mode.

For now the default is legacy, to be flipped to prefer-crc after some
time.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov
2020-11-19 16:04:58 +01:00
parent 313771e80f
commit 00498b9941
7 changed files with 100 additions and 8 deletions
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include/linux/ceph/libceph.h
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@@ -53,6 +53,7 @@ struct ceph_options {
unsigned long osd_keepalive_timeout; /* jiffies */
unsigned long osd_request_timeout; /* jiffies */
u32 read_from_replica; /* CEPH_OSD_FLAG_BALANCE/LOCALIZE_READS */
int con_modes[2]; /* CEPH_CON_MODE_* */
/*
* any type that can't be simply compared or doesn't need