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drbd-9.0.13

drbd-9.0.13: 9.0.13-1 (api:genl2/proto:86-113/transport:14)
@Philipp-Reisner Philipp-Reisner tagged this 17 Apr 10:05 
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 * abort a resync if a resync source becomes weakly connected and the
   sync target is a neighbor of the primary; the lack of doing so was
   a possible source of data corruption
 * fix UUID handling with multiple diskless nodes; If the primary role
   is moved between them, and no write happens before the storage
   nodes are disconnect; before this fix the storage nodes would outdate
   themselves upon reconnect
 * When a data-set gets into contact (attach or connect) with an all
   diskless cluster with a primary and the exposed UUID does not match
   the arriving data-set, make sure to either set it to "Consistent"
   or to reject the attach
 * correctly handle when a node that was marked as intentional diskless
   should get a disk; allocate bitmap slots when the --bitmap=no flag
   gets removed; reject peers to attach if they are marked with --bitmap=no
 * fix outdating of weakly connected nodes; It was broken when an already
   primary node joins the cluster at the other end
 * made returning from Ahead to SyncSource more reliable; the old code
   may have missed the event if the write to the local backend was still
   pending when the barrier-ack comes in
 * fix a hard to trigger deadlock in the receiver; it triggered sometimes
   on the Secondary if a resync was going on and writes on the primary
   happen to the same area while the connection is interrupted; it caused
   the device to be stuck in "NetworkFailure" state
 * fix online resize in the presence of two or more diskless nodes
 * fix online add of volumes to diskless nodes when it already has
   established connections
 * Set the SO_KEEPALIVE socket option on data sockets. Can be important
   if long lived DRBD connections go through a firewall with connection
   tracking
 * automatically solve a specific split brain when quorum is enabled
   and a node does no IO between losing connections to other nodes
 * Compat: Drop support for kernels older 2.6.32 and distros older than
   RHEL6; Added support for kernels up to v4.15.x
 * new wire packet P_ZEROES a cousin of P_DISCARD, following the kernel
   as it introduced separated BIO ops for writing zeros and discarding
 * compat workaround for two RHEL 7.5 idiosyncrasies regarding refcount_t
   and struct nla_policy
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