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Subject[PATCH 00/17] DRBD updates for 4.21

Hi Jens,

I hope this is not too late for your for-4.21 branch.

These are all from last April or even older,
I was convinced we sent these for 4.19 already.
But we didn't :-(

The interesting new feature is "introduce P_ZEROES", which is replacing
45c21793a660 drbd: implement REQ_OP_WRITE_ZEROES
because that led to "full allocation" for fstrim on dm-thin or similar,
which is certainly not the intended behavior.

Patch 3 to 8 help with recovery from odd corner cases in
multiple error scenarios in a cluster, potentially after some admin
already "tried things".

All others are sufficiently simple and supposedly "obvious".

Lars Ellenberg (13):
drbd: must not use connection after kref_put(&connection->kref)
drbd: centralize printk reporting of new size into drbd_set_my_capacity()
drbd: ignore "all zero" peer volume sizes in handshake
drbd: disconnect, if the wrong UUIDs are attached on a connected peer
drbd: fix confusing error message during attach
drbd: attach on connected diskless peer must not shrink a consistent device
drbd: reject attach of unsuitable uuids even if connected
drbd: fix comment typos
drbd: do not block when adjusting "disk-options" while IO is frozen
drbd: avoid spurious self-outdating with concurrent disconnect / down
drbd: don't retry connection if peers do not agree on "authentication" settings
drbd: skip spurious timeout (ping-timeo) when failing promote
drbd: introduce P_ZEROES (REQ_OP_WRITE_ZEROES on the "wire")

Luc Van Oostenryck (1):
drbd: fix print_st_err()'s prototype to match the definition

Nathan Chancellor (2):
drbd: Avoid Clang warning about pointless switch statment
drbd: Change drbd_request_detach_interruptible's return type to int

Roland Kammerer (1):
drbd: narrow rcu_read_lock in drbd_sync_handshake

drivers/block/drbd/drbd_debugfs.c | 2 +
drivers/block/drbd/drbd_int.h | 19 +--
drivers/block/drbd/drbd_main.c | 28 +++-
drivers/block/drbd/drbd_nl.c | 133 ++++++++++++---
drivers/block/drbd/drbd_protocol.h | 47 ++++++
drivers/block/drbd/drbd_receiver.c | 251 +++++++++++++++++++++++++----
drivers/block/drbd/drbd_req.c | 19 +--
drivers/block/drbd/drbd_req.h | 2 +
drivers/block/drbd/drbd_state.c | 11 +-
drivers/block/drbd/drbd_state.h | 5 +-
drivers/block/drbd/drbd_worker.c | 2 +-
include/linux/drbd.h | 2 +-
include/linux/genl_magic_struct.h | 5 +-
13 files changed, 434 insertions(+), 92 deletions(-)


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