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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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8
include/linux/ceph/auth.h
View file

@ -98,11 +98,15 @@ struct ceph_auth_client {
const struct ceph_crypto_key *key; /* our secret key */
unsigned want_keys; /* which services we want */
int preferred_mode; /* CEPH_CON_MODE_* */
int fallback_mode; /* ditto */
struct mutex mutex;
};
extern struct ceph_auth_client *ceph_auth_init(const char *name,
const struct ceph_crypto_key *key);
struct ceph_auth_client *ceph_auth_init(const char *name,
const struct ceph_crypto_key *key,
const int *con_modes);
extern void ceph_auth_destroy(struct ceph_auth_client *ac);
extern void ceph_auth_reset(struct ceph_auth_client *ac);