[00/18] sg: add v4 interface

Message

Douglas Gilbert June 17, 2019, 3:39 a.m. UTC

This patchset extends the SCSI generic (sg) driver found in lk 5.3 .
The sg driver has a version number which is visible via an ioctl()
and is bumped from 3.5.36 to 4.0.03 by this patchset.
The additions and changes are described in some detail in this
long webpage:
    http://sg.danny.cz/sg/sg_v40.html

Most new features described in the above webpage are not implemented
in this patchset. Features that are not included are file descriptor
sharing, request sharing, multiple requests (in one invocation) and
the extended ioctl(). A latter patchset may add those features. The
SG_IOSUMIT, SG_IOSUBMIT_V3, SG_IORECEIVE and SG_IORECEIVE_V3 ioctls
are added in this patchset.

Testing:
The sg3_utils package has several extensions in sg3_utils-1.45
beta (revision 826) to support and test the version 4 sg
driver presented in this patchset.
The new and revised testing utilities are outlined on the
same webpage as above in the second half of the section
titled: "15 Downloads and testing".

This patchset is against Martin Petersen's 5.3/scsi-queue
branch. It will also apply to lk 5.1 and probably lk 5.0 .

Douglas Gilbert (18):
  sg: move functions around
  sg: remove typedefs, type+formatting cleanup
  sg: sg_log and is_enabled
  sg: rework sg_poll(), minor changes
  sg: bitops in sg_device
  sg: make open count an atomic
  sg: move header to uapi section
  sg: speed sg_poll and sg_get_num_waiting
  sg: sg_allow_if_err_recovery and renames
  sg: remove most access_ok functions
  sg: replace rq array with lists
  sg: sense buffer rework
  sg: add sg v4 interface support
  sg: rework debug info
  sg: add 8 byte SCSI LUN to sg_scsi_id
  sg: expand sg_comm_wr_t
  sg: add sg_iosubmit_v3 and sg_ioreceive_v3 ioctls
  sg: bump version to 4.0.03

 drivers/scsi/sg.c      | 4373 ++++++++++++++++++++++++++--------------
 include/scsi/sg.h      |  268 +--
 include/uapi/scsi/sg.h |  373 ++++
 3 files changed, 3269 insertions(+), 1745 deletions(-)
 create mode 100644 include/uapi/scsi/sg.h