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target: REPORT LUNS should return LUN 0 even for dynamic ACLs

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If an initiator doesn't have any real LUNs assigned, we should report
LUN 0 and a LUN list length of 1.  Some versions of Solaris at least
go beserk if we report a LUN list length of 0.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: <stable@vger.kernel.org> # v3.1+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Roland Dreier 2015-07-24 12:11:46 -07:00 committed by Nicholas Bellinger
parent 9547308bda
commit 9c395170a5
1 changed files with 10 additions and 4 deletions
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14
drivers/target/target_core_spc.c
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@ -1221,11 +1221,9 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* coming via a target_core_mod PASSTHROUGH op, and not through
* a $FABRIC_MOD. In that case, report LUN=0 only.
*/
if (!sess) {
int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
lun_count = 1;
if (!sess)
goto done;
}
nacl = sess->se_node_acl;
rcu_read_lock();
@ -1248,6 +1246,14 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
* See SPC3 r07, page 159.
*/
done:
/*
* If no LUNs are accessible, report virtual LUN 0.
*/
if (lun_count == 0) {
int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
lun_count = 1;
}
lun_count *= 8;
buf[0] = ((lun_count >> 24) & 0xff);
buf[1] = ((lun_count >> 16) & 0xff);