kernel_optimize_test/include/scsi
Lee Duncan fe0a8a95e7 scsi: libiscsi: Fix NOP race condition
iSCSI NOPs are sometimes "lost", mistakenly sent to the user-land iscsid
daemon instead of handled in the kernel, as they should be, resulting in a
message from the daemon like:

  iscsid: Got nop in, but kernel supports nop handling.

This can occur because of the new forward- and back-locks, and the fact
that an iSCSI NOP response can occur before processing of the NOP send is
complete. This can result in "conn->ping_task" being NULL in
iscsi_nop_out_rsp(), when the pointer is actually in the process of being
set.

To work around this, we add a new state to the "ping_task" pointer. In
addition to NULL (not assigned) and a pointer (assigned), we add the state
"being set", which is signaled with an INVALID pointer (using "-1").

Link: https://lore.kernel.org/r/20201106193317.16993-1-leeman.duncan@gmail.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-16 22:32:50 -05:00
..
fc
fc_encode.h
fc_frame.h
fcoe_sysfs.h
iscsi_if.h
iscsi_proto.h
iser.h
libfc.h
libfcoe.h
libiscsi_tcp.h
libiscsi.h scsi: libiscsi: Fix NOP race condition 2020-11-16 22:32:50 -05:00
libsas.h
sas_ata.h
sas.h
scsi_bsg_iscsi.h
scsi_cmnd.h
scsi_common.h
scsi_dbg.h
scsi_device.h
scsi_devinfo.h
scsi_dh.h
scsi_driver.h
scsi_eh.h
scsi_host.h
scsi_ioctl.h
scsi_proto.h
scsi_request.h
scsi_tcq.h
scsi_transport_fc.h
scsi_transport_iscsi.h
scsi_transport_sas.h
scsi_transport_spi.h
scsi_transport_srp.h
scsi_transport.h
scsi.h
scsicam.h
sg.h
srp.h
viosrp.h