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Commit a3785c87 authored by Nicholas Bellinger's avatar Nicholas Bellinger
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target/pscsi: Only emulate REPORT_LUNS for passthrough 



This patch changes back the pSCSI backend to follow pre 3.6-queue code to
passthrough SPC-3 persistent reservations + SPC-2 legacy reservation
handling to the underlying LLD / physical hardware.

For folks who really need this for their own SPC-3 emulation logic, avoid
changing the functionality of this beyond what is exported for REPORT_LUNS
for existing code, and to avoid problems with SPC-3 PR/ALUA as INQUIRY
EVPD=0x83 emulation needs to be in place in order for this to work as
expected with spc_parse_cdb() code..

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent eba2ca45

drivers/target/target_core_pscsi.c

+3 −9
Original line number Diff line number Diff line
@@ -1061,18 +1061,12 @@ static int pscsi_parse_cdb(struct se_cmd *cmd) 
	pscsi_clear_cdb_lun(cdb);



	/*

	 * For REPORT LUNS we always need to emulate the respone, and for everything

	 * related to persistent reservations and ALUA we might optionally use our

	 * handlers before passing on the command to the physical hardware.

	 * For REPORT LUNS we always need to emulate the response, for everything

	 * else the default for pSCSI is to pass the command to the underlying

	 * LLD / physical hardware.

	 */

	switch (cdb[0]) {

	case REPORT_LUNS:

	case PERSISTENT_RESERVE_IN:

	case PERSISTENT_RESERVE_OUT:

	case RELEASE:

	case RELEASE_10:

	case RESERVE:

	case RESERVE_10:

		ret = spc_parse_cdb(cmd, &dummy_size);

		if (ret)

			return ret;