[dm-devel] [RFC PATCH v2 0/2] dm: dm_blk_ioctl(): implement failover for SG_IO on dm-multipath
mwilck at suse.com
mwilck at suse.com
Thu Apr 29 15:50:22 UTC 2021
From: Martin Wilck <mwilck at suse.com>
Hi Mike,
here is v2 of my attempt to add retry logic to SG_IO on dm-multipath devices.
Regards
Martin
Changes v1->v2:
- applied modifications from Mike Snitzer
- moved SG_IO dependent code to a separate file, no scsi includes in
dm.c any more
- made the new code depend on a configuration option
- separated out scsi changes, made scsi_result_to_blk_status()
inline to avoid dependency of dm_mod from scsi_mod (Paolo Bonzini)
Martin Wilck (2):
scsi: convert scsi_result_to_blk_status() to inline
dm: add CONFIG_DM_MULTIPATH_SG_IO - failover for SG_IO on dm-multipath
block/scsi_ioctl.c | 5 +-
drivers/md/Kconfig | 11 ++++
drivers/md/Makefile | 4 ++
drivers/md/dm-core.h | 5 ++
drivers/md/dm-rq.h | 11 ++++
drivers/md/dm-scsi_ioctl.c | 127 +++++++++++++++++++++++++++++++++++++
drivers/md/dm.c | 20 +++++-
drivers/scsi/scsi_lib.c | 40 ------------
include/linux/blkdev.h | 2 +
include/scsi/scsi_cmnd.h | 83 ++++++++++++++++++++++--
10 files changed, 259 insertions(+), 49 deletions(-)
create mode 100644 drivers/md/dm-scsi_ioctl.c
--
2.31.1
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