mbox series

[RFC,v2,0/2] dm: dm_blk_ioctl(): implement failover for SG_IO on dm-multipath

Message ID 20210429155024.4947-1-mwilck@suse.com (mailing list archive)
Headers show
Series dm: dm_blk_ioctl(): implement failover for SG_IO on dm-multipath | expand

Message

Martin Wilck April 29, 2021, 3:50 p.m. UTC 
From: Martin Wilck <mwilck@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