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Message-Id: <1233307994.6442.252.camel@haakon2.linux-iscsi.org>
Date: Fri, 30 Jan 2009 01:33:14 -0800
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: LKML <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>
Cc: Douglas Gilbert <dgilbert@...erlog.com>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Andrew Morton <akpm@...l.org>, Christoph Hellwig <hch@....de>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Rafiu Fakunle <rafiu@...nfiler.com>,
"Lawrence E. Rosen" <lrosen@...technologies.com>,
Arne Redlich <agr@...erkom-dd.de>,
Ming Zhang <blackmagic02881@...il.com>
Subject: [PATCH 2/4] [Target_Core_Mod/ConfigFS]: Add res_pr_holder_tg_port
attribute
>>From a0cdb125c6a79e4a638e54dba7d80d18e423a926 Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Date: Thu, 29 Jan 2009 19:18:45 -0800
Subject: [PATCH 2/4] [Target_Core_Mod/ConfigFS]: Add res_pr_holder_tg_port attribute
This patch adds /sys/kernel/config/target/core/$HBA/$STORAGE_OBJECT/pr/res_pr_holder_tg_port
This attribute is used when a SPC-3 compliant PR RESERVE Service Action has
been successfully executed, and will contain information about the target node fabric
and endpoint. For LIO-Target v3.0 ports using PERSISTENT_RESERVATIONS, the output
looks like:
target# /sys/kernel/config/target/core/iblock_0/lvm_test0/pr/res_pr_holder_tg_port
SPC-3 Reservation: iSCSI Target Node Endpoint: iqn.2003-01.org.linux-iscsi.target.i686:sn.e475ed6fcdd0
SPC-3 Reservation: Portal Identifer Tag: 1 Logical Unit: 0
This patch basically moves this logic from the existing ConfigFS attribute
res_pr_all_tgt_pts to its own seperate RO attribute.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/lio-core/target_core_configfs.c | 76 +++++++++++++++++++++---------
1 files changed, 53 insertions(+), 23 deletions(-)
diff --git a/drivers/lio-core/target_core_configfs.c b/drivers/lio-core/target_core_configfs.c
index 3dd7dbd..3af6cb1 100644
--- a/drivers/lio-core/target_core_configfs.c
+++ b/drivers/lio-core/target_core_configfs.c
@@ -797,7 +797,7 @@ static ssize_t target_core_dev_pr_show_spc3_res (
return(*len);
}
se_nacl = pr_reg->pr_reg_nacl;
- *len += sprintf(page+*len, "SPC-3 Reservation FABRIC[%s]: Initiator: %s\n",
+ *len += sprintf(page+*len, "SPC-3 Reservation: %s Initiator: %s\n",
TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
se_nacl->initiatorname);
spin_unlock(&dev->dev_reservation_lock);
@@ -818,7 +818,7 @@ static ssize_t target_core_dev_pr_show_spc2_res (
spin_unlock(&dev->dev_reservation_lock);
return(*len);
}
- *len += sprintf(page+*len, "SPC-2 Reservation FABRIC[%s]: Initiator: %s\n",
+ *len += sprintf(page+*len, "SPC-2 Reservation: %s Initiator: %s\n",
TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
se_nacl->initiatorname);
spin_unlock(&dev->dev_reservation_lock);
@@ -865,8 +865,6 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts (
char *page)
{
se_device_t *dev;
- se_node_acl_t *se_nacl;
- se_portal_group_t *se_tpg;
t10_pr_registration_t *pr_reg;
ssize_t len = 0;
@@ -887,25 +885,11 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts (
* Basic PERSISTENT RESERVER OUT parameter list, page 290
*/
if (pr_reg->pr_reg_all_tg_pt)
- len = sprintf(page, "SPC-3 Reservation holder: All Target"
- " Ports reserved\n");
- else {
- se_lun_t *lun = dev->dev_pr_tg_port_res_lun;
- struct target_core_fabric_ops *tfo;
-
- se_nacl = pr_reg->pr_reg_nacl;
- se_tpg = se_nacl->se_tpg;
- tfo = TPG_TFO(se_tpg);
-
- len = sprintf(page, "SPC-3 Reservation holder: Single Target"
- " Port reserved\n");
- len += sprintf(page+len, "SPC-3 Reservation holder: Fabric: "
- " %s Node Endpoint: %s\n", tfo->get_fabric_name(),
- tfo->tpg_get_wwn(se_tpg));
- len += sprintf(page+len, "SPC-3 Reservation holder: Portal"
- " Identifer Tag: %hu Logical Unit: %u\n",
- tfo->tpg_get_tag(se_tpg), lun->unpacked_lun);
- }
+ len = sprintf(page, "SPC-3 Reservation: All Target"
+ " Ports registration\n");
+ else
+ len = sprintf(page, "SPC-3 Reservation: Single"
+ " Target Port registration\n");
spin_unlock(&dev->dev_reservation_lock);
return(len);
@@ -932,6 +916,51 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_generation (
SE_DEV_PR_ATTR_RO(res_pr_generation);
/*
+ * res_pr_holder_tg_port
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port (
+ struct se_subsystem_dev_s *su_dev,
+ char *page)
+{
+ se_device_t *dev;
+ se_node_acl_t *se_nacl;
+ se_lun_t *lun;
+ se_portal_group_t *se_tpg;
+ t10_pr_registration_t *pr_reg;
+ struct target_core_fabric_ops *tfo;
+ ssize_t len = 0;
+
+ if (!(dev = su_dev->se_dev_ptr))
+ return(-ENODEV);
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return(len);
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!(pr_reg = dev->dev_pr_res_holder)) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return(len);
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = se_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ tfo = TPG_TFO(se_tpg);
+
+ len += sprintf(page+len, "SPC-3 Reservation: %s"
+ " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
+ tfo->tpg_get_wwn(se_tpg));
+ len += sprintf(page+len, "SPC-3 Reservation: Portal"
+ " Identifer Tag: %hu Logical Unit: %u\n",
+ tfo->tpg_get_tag(se_tpg), lun->unpacked_lun);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return(len);
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
+
+/*
* res_pr_registered_i_pts
*/
static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts (
@@ -1049,6 +1078,7 @@ static struct configfs_attribute *target_core_dev_pr_attrs[] = {
&target_core_dev_pr_res_holder.attr,
&target_core_dev_pr_res_pr_all_tgt_pts.attr,
&target_core_dev_pr_res_pr_generation.attr,
+ &target_core_dev_pr_res_pr_holder_tg_port.attr,
&target_core_dev_pr_res_pr_registered_i_pts.attr,
&target_core_dev_pr_res_pr_type.attr,
&target_core_dev_pr_res_type.attr,
--
1.5.4.1
--
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