Add an internal API nvmf_subsystem_set_ana_state() to change the
ANA state of the subsystem listener whose trid matches.
ANA optimized state, ANA non-optimized state, and ANA inaccessible
state are supported. ANA change state is not used and ANA persistent
loss state is not supported.
After changing the ANA state of the subsystem listener, on each poll
group, controllers, whose the subsystem listener match, send ANA
change notice.
Initiators query ANA log page anyway if they receive ANA change
notification. False positive notification should be avoided but is
acceptable.
To avoid any concurrency conflict, simply compare ctrlr->listener and
the passed listener.
It may be better to execute nvmf_subsystem_set_ana_state() on the
subsystem thread but currently the RPC thread adds and removes a
listener to and from the subsystem, respectively, and the subsystem
has been suspended while executing nvmf_subsystem_set_ana_state().
Hence we keep this as a future enhancement.
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: If1910b79dd33d904114e258ae2c5e868947cdc52
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4079
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Anil Veerabhadrappa <anil.veerabhadrappa@broadcom.com>
071d80f37b