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authorIlya Dryomov <idryomov@gmail.com>2020-05-23 12:45:48 +0300
committerIlya Dryomov <idryomov@gmail.com>2020-06-01 14:22:53 +0300
commit117d96a04f007ce8fc2e292369056c3bd09f6f63 (patch)
tree8fb67a4f204be96d285341aff9bffce670ce2930 /net/rose
parent45e6aa9f5592cd127367074f4822039cd8a825c3 (diff)
downloadlinux-117d96a04f007ce8fc2e292369056c3bd09f6f63.tar.xz
libceph: support for balanced and localized reads
OSD-side issues with reads from replica have been resolved in Octopus. Reading from replica should be safe wrt. unstable or uncommitted state now, so add support for balanced and localized reads. There are two cases when a read from replica can't be served: - OSD may silently drop the request, expecting the client to notice that the acting set has changed and resend via the usual means (handled with t->used_replica) - OSD may return EAGAIN, expecting the client to resend to the primary, ignoring replica read flags (see handle_reply()) Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
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