| From | Ben Hutchings <> | Date | Fri, 09 Oct 2015 01:12:27 +0100 | Subject | [PATCH 3.2 009/107] target: REPORT LUNS should return LUN 0 even for dynamic ACLs |
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3.2.72-rc1 review patch. If anyone has any objections, please let me know.
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From: Roland Dreier <roland@purestorage.com>
commit 9c395170a559d3b23dad100b01fc4a89d661c698 upstream.
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> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> [bwh: Backported to 3.2: adjust filename, context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/target/target_core_device.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
--- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -668,11 +668,8 @@ int target_report_luns(struct se_task *s * coming via a target_core_mod PASSTHROUGH op, and not through * a $FABRIC_MOD. In that case, report LUN=0 only. */ - if (!se_sess) { - int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); - lun_count = 1; + if (!se_sess) goto done; - } spin_lock_irq(&se_sess->se_node_acl->device_list_lock); for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { @@ -699,6 +696,14 @@ int target_report_luns(struct se_task *s * 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);
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