Hi, this is the final patch-series to make dlm reliable when reconnection occurs. You can easily generate a couple of reconnections by running:
tcpkill -9 -i $IFACE port 21064 on your own to test these patches. At some time dlm will detect message drops and will retransmit messages if necessary. It introduces a new dlm protocol behaviour and increases the dlm protocol version. I tested it with SCTP as well and tried to be backwardscompatible with dlm protocol version 3.1. However I don't recommend at all to not mix these versions in a setup since dlm version 3.2 fixes long-term issues. - Alex Alexander Aring (16): fs: dlm: add errno handling to check callback fs: dlm: add check if dlm is currently running fs: dlm: add check for minimum allocation length fs: dlm: public utils header utils fs: dlm: use GFP_ZERO for page buffer fs: dlm: simplify writequeue handling fs: dlm: add more midcomms hooks fs: dlm: make buffer handling per msg fs: dlm: make new buffer handling softirq ready fs: dlm: add functionality to retransmit a message fs: dlm: move out some hash functionality fs: dlm: remove unaligned memory access handling fs: dlm: check on minimum header size fs: dlm: add union in dlm header for lockspace id fs: dlm: add reliable connection if reconnect fs: dlm: don't allow half transmitted messages fs/dlm/config.c | 60 ++- fs/dlm/dlm_internal.h | 32 +- fs/dlm/lock.c | 16 +- fs/dlm/lockspace.c | 5 +- fs/dlm/lowcomms.c | 273 +++++++--- fs/dlm/lowcomms.h | 25 +- fs/dlm/member.c | 16 + fs/dlm/member.h | 1 + fs/dlm/midcomms.c | 1094 +++++++++++++++++++++++++++++++++++++++-- fs/dlm/midcomms.h | 10 + fs/dlm/rcom.c | 61 ++- fs/dlm/recoverd.c | 4 + fs/dlm/util.c | 10 +- fs/dlm/util.h | 2 + 14 files changed, 1438 insertions(+), 171 deletions(-) -- 2.26.2
