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History

Nicholas Bellinger ca7767a3f8 target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling

commit c8e639852ad720499912acedfd6b072325fd2807 upstream.

This patch fixes a bug for COMPARE_AND_WRITE handling with
fabrics using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC.

It adds the missing allocation for cmd->t_bidi_data_sg within
transport_generic_new_cmd() that is used by COMPARE_AND_WRITE
for the initial READ payload, even if the fabric is already
providing a pre-allocated buffer for cmd->t_data_sg.

Also, fix zero-length COMPARE_AND_WRITE handling within the
compare_and_write_callback() and target_complete_ok_work()
to queue the response, skipping the initial READ.

This fixes COMPARE_AND_WRITE emulation with loopback, vhost,
and xen-backend fabric drivers using SG_TO_MEM_NOALLOC.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2015-05-06 22:03:53 +02:00

iscsi

iscsi-target: Convert iscsi_thread_set usage to kthread.h

2015-05-06 22:03:53 +02:00

configfs_macros.h

doc: fix broken references

2011-09-27 18:08:04 +02:00

target_core_backend_configfs.h

target: Drop left-over fabric_max_sectors attribute

2015-01-09 15:22:05 -08:00

target_core_backend.h

target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0