Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
"Updates to the usual drivers (ufs, lpfc, fnic, qla2xx, mpi3mr).

The majo

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
"Updates to the usual drivers (ufs, lpfc, fnic, qla2xx, mpi3mr).

The major core change is the renaming of the slave_ methods plus a bit
of constification. The rest are minor updates and fixes"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (103 commits)
scsi: fnic: Propagate SCSI error code from fnic_scsi_drv_init()
scsi: fnic: Test for memory allocation failure and return error code
scsi: fnic: Return appropriate error code from failure of scsi drv init
scsi: fnic: Return appropriate error code for mem alloc failure
scsi: fnic: Remove always-true IS_FNIC_FCP_INITIATOR macro
scsi: fnic: Fix use of uninitialized value in debug message
scsi: fnic: Delete incorrect debugfs error handling
scsi: fnic: Remove unnecessary else to fix warning in FDLS FIP
scsi: fnic: Remove extern definition from .c files
scsi: fnic: Remove unnecessary else and unnecessary break in FDLS
scsi: mpi3mr: Fix possible crash when setting up bsg fails
scsi: ufs: bsg: Set bsg_queue to NULL after removal
scsi: ufs: bsg: Delete bsg_dev when setting up bsg fails
scsi: st: Don't set pos_unknown just after device recognition
scsi: aic7xxx: Fix build 'aicasm' warning
scsi: Revert "scsi: ufs: core: Probe for EXT_IID support"
scsi: storvsc: Ratelimit warning logs to prevent VM denial of service
scsi: scsi_debug: Constify sdebug_driver_template
scsi: documentation: Corrections for struct updates
scsi: driver-api: documentation: Change what is added to docbook
...

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Merge patch series "Introduce support for Fabric Discovery and Login Services"

Karan Tilak Kumar <kartilak@cisco.com> says:

Hi Martin, reviewers,

This cover letter describes the feature: add suppo

Merge patch series "Introduce support for Fabric Discovery and Login Services"

Karan Tilak Kumar <kartilak@cisco.com> says:

Hi Martin, reviewers,

This cover letter describes the feature: add support for Fabric
Discovery and Login Services (FDLS) to fnic driver.

This functionality is needed to support port channel RSCN (PC-RSCN)
handling and serves as a base to create FC-NVME initiators
(planned later), and eCPU handling (planned later).

It is used to discover the fabric and target ports associated with the
fabric. It will then login to the target ports that are zoned to it.
The driver uses the tport structure presented by FDLS.

Port channel RSCN is a Cisco vendor specific RSCN event. It is
applicable only to Cisco UCS fabrics.

In cases where the eCPU in the UCS VIC (Unified Computing Services
Virtual Interface Card) hangs, a fabric log out is sent to the fabric.
Upon successful log out from the fabric, the IO path is failed over to
a new path.

Generally from a feature perspective, the code is divided into adding
support for this functionality initially. Then, code has been added to
modify the IO path and interfaces. Finally, support for port channel
RSCN handling has been added.

Here are the headers of some of the salient patches:

o add headers and definitions for FDLS
o add support for fabric based solicited requests and responses
o add support for target based solicited requests and responses
o add support for unsolicited requests and responses
o add support for FDMI
o add support for FIP
o add functionality in fnic to support FDLS
o modify IO path to use FDLS and tport
o modify fnic interfaces to use FDLS
o add support to handle port channel RSCN

Even though the patches have been made into a series, some patches are
heavier than others. But, every effort has been made to keep the
purpose of each patch as a single-purpose, and to compile cleanly.
All the individual patches compile cleanly. The compiler used is GCC
13.3. Some function calls have been coded as placeholders with
appropriate comments to avoid compiler warnings.

This patchset has been tested as a whole. Therefore, the tested-by
fields have been added only to one patch in the set. I've refrained
from adding tested-by to most of the patches, so as to not mislead the
reviewer/reader.

A brief note on the unit tests:

o. Perform zone in zone out testing in a loop: remove a target
port from the zone, add it to the zone in a loop. 1000+ iterations
of this test have been successful.

o. Configure multipathing, and run link flaps on single link.
IOs drop briefly, but pick up as expected.

o. Configure multipathing, and run link flaps on two links, with a
30 second delay in between. IOs drop briefly, but pick up as expected.

o. Module load/unload test.

o. Repeat the above tests with 1 queue and 64 queues.
All tests were successful.

Please consider this patch series for the next merge window.

Link: https://lore.kernel.org/r/20241212020312.4786-1-kartilak@cisco.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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scsi: fnic: Add headers and definitions for FDLS

Add headers and definitions for FDLS (Fabric Discovery and Login Services).

Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Co-developed-by: Gian

scsi: fnic: Add headers and definitions for FDLS

Add headers and definitions for FDLS (Fabric Discovery and Login Services).

Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Co-developed-by: Gian Carlo Boffa <gcboffa@cisco.com>
Signed-off-by: Gian Carlo Boffa <gcboffa@cisco.com>
Co-developed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Signed-off-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Co-developed-by: Arun Easi <aeasi@cisco.com>
Signed-off-by: Arun Easi <aeasi@cisco.com>
Co-developed-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
Link: https://lore.kernel.org/r/20241212020312.4786-3-kartilak@cisco.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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