Replaying md through _spdk_bs_load_replay_md_cpl() starts with
md page 0 in search of first valid md page starting a chain
for particular blob.
When it is found, next pages read are from the current pages
`next` page - next in chain.
After whole chain is read, it goes back to first page in chain
and starts search for next valid chain from there.
This patch adds separation between reading particular chain,
and moving to the next one.
Moving on to the next one happens in _spdk_bs_load_replay_md_chain_cpl().
Further in the series, extent pages will be added in the metadata.
Those are not within any particular blobs chain of metadata,
but spread out over the md region.
It is not enough to read all md and read extent pages.
In case of power failure, only extent pages known to be valid
are the ones which are pointed to by some valid md chain.
In futher patches, a step will be added after reading particular
valid md chain to go read extent pages pointed by it.
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I6e7cd64af66ce5db0abd2ad5962d604ac2b30994
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/481900
Community-CI: SPDK CI Jenkins <sys_sgci@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
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