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Date: Tue, 18 Aug 2009 16:16:05 -0700
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>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"H. Peter Anvin" <hpa@...or.com>,
Alasdair G Kergon <agk@...hat.com>,
Joel Becker <joel.becker@...cle.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Florian Haas <florian.haas@...bit.com>,
Philipp Reisner <philipp.reisner@...bit.com>
Subject: [PATCH 4/4] [LIO-Target/ConfigFS]: Add attribute for ALUA
secondary port access state
Greetings,
This patch updates the LIO-Target fabric module configfs code to add
support for the SPC-4 defined ALUA secondary port access state OFFLINE. This
new attribute is located at:
/sys/kernel/config/target/iscsi/$TARGETNAME/tpgt_$TPGT/lun/lun_0/alua_tg_pt_offline
which calls generic target_core_mod code to preform the actual OFFLINE <-> ONLINE
state transitions for this iSCSI target port/LUN.
Also, this patch does a small cleanup for lio_target_port_cit and makes it use
CONFIGFS_EATTR_*() macros to generate the default store()/show() handlers for the
struct configfs_item_operations lio_target_port_item_ops.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/lio-core/iscsi_target_configfs.c | 99 ++++++++++++++++-------------
1 files changed, 55 insertions(+), 44 deletions(-)
diff --git a/drivers/lio-core/iscsi_target_configfs.c b/drivers/lio-core/iscsi_target_configfs.c
index 3fd42dc..1230b74 100644
--- a/drivers/lio-core/iscsi_target_configfs.c
+++ b/drivers/lio-core/iscsi_target_configfs.c
@@ -402,67 +402,78 @@ static struct config_item_type lio_target_np_cit = {
// Start items for lio_target_port_cit
-static ssize_t lio_target_show_port_alua_tg_pt_gp (void *p, char *page)
-{
- se_lun_t *lun = (se_lun_t *)p;
+CONFIGFS_EATTR_STRUCT(lio_target_port, se_lun_s);
+#define LIO_PORT_ATTR(_name, _mode) \
+static struct lio_target_port_attribute lio_target_port_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ lio_target_port_show_attr_##_name, \
+ lio_target_port_store_attr_##_name);
+
+#define LIO_PORT_ATTR_RO(_name, _mode) \
+static struct lio_target_port_attribute lio_target_port_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ lio_target_port_show_attr_##_name);
+/*
+ * alua_tg_pt_gp
+ */
+static ssize_t lio_target_port_show_attr_alua_tg_pt_gp(
+ struct se_lun_s *lun,
+ char *page)
+{
if (!(lun->lun_sep))
- return(-ENODEV);
+ return -ENODEV;
- return(core_alua_show_tg_pt_gp_info(lun->lun_sep, page));
+ return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
}
-static ssize_t lio_target_store_port_alua_tg_pt_gp (void *p, const char *page, size_t count)
+static ssize_t lio_target_port_store_attr_alua_tg_pt_gp(
+ struct se_lun_s *lun,
+ const char *page,
+ size_t count)
{
- se_lun_t *lun = (se_lun_t *)p;
-
if (!(lun->lun_sep))
- return(-ENODEV);
+ return -ENODEV;
- return(core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count));
+ return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
}
-static struct lio_target_configfs_attribute lio_target_attr_port_alua_tg_pt_gp = {
- .attr = { .ca_owner = THIS_MODULE,
- .ca_name = "alua_tg_pt_gp",
- .ca_mode = S_IRUGO | S_IWUSR },
- .show = lio_target_show_port_alua_tg_pt_gp,
- .store = lio_target_store_port_alua_tg_pt_gp,
-};
-
-static struct configfs_attribute *lio_target_port_attrs[] = {
- &lio_target_attr_port_alua_tg_pt_gp.attr,
- NULL,
-};
+LIO_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
-static ssize_t lio_target_port_show (struct config_item *item,
- struct configfs_attribute *attr,
- char *page)
+/*
+ * alua_tg_pt_offline
+ */
+static ssize_t lio_target_port_show_attr_alua_tg_pt_offline(
+ struct se_lun_s *lun,
+ char *page)
{
- se_lun_t *lun = container_of(to_config_group(item), se_lun_t, lun_group);
- struct lio_target_configfs_attribute *lt_attr = container_of(
- attr, struct lio_target_configfs_attribute, attr);
-
- if (!(lt_attr->show))
- return(-EINVAL);
+ if (!(lun->lun_sep))
+ return -ENODEV;
- return(lt_attr->show((void *)lun, page));
+ return core_alua_show_offline_bit(lun, page);
}
-static ssize_t lio_target_port_store (struct config_item *item,
- struct configfs_attribute *attr,
- const char *page, size_t count)
+static ssize_t lio_target_port_store_attr_alua_tg_pt_offline(
+ struct se_lun_s *lun,
+ const char *page,
+ size_t count)
{
- se_lun_t *lun = container_of(to_config_group(item), se_lun_t, lun_group);
- struct lio_target_configfs_attribute *lt_attr = container_of(
- attr, struct lio_target_configfs_attribute, attr);
-
- if (!(lt_attr->store))
- return(-EINVAL);
+ if (!(lun->lun_sep))
+ return -ENODEV;
- return(lt_attr->store((void *)lun, page, count));
+ return core_alua_store_offline_bit(lun, page, count);
}
+LIO_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_port_attrs[] = {
+ &lio_target_port_alua_tg_pt_gp.attr,
+ &lio_target_port_alua_tg_pt_offline.attr,
+ NULL,
+};
+
+CONFIGFS_EATTR_OPS(lio_target_port, se_lun_s, lun_group);
+
static int lio_target_port_link (struct config_item *lun_ci, struct config_item *se_dev_ci)
{
iscsi_portal_group_t *tpg;
@@ -563,8 +574,8 @@ static int lio_target_port_unlink (struct config_item *lun_ci, struct config_ite
static struct configfs_item_operations lio_target_port_item_ops = {
.release = NULL,
- .show_attribute = lio_target_port_show,
- .store_attribute = lio_target_port_store,
+ .show_attribute = lio_target_port_attr_show,
+ .store_attribute = lio_target_port_attr_store,
.allow_link = lio_target_port_link,
.check_link = lio_target_port_check_link,
.drop_link = lio_target_port_unlink,
--
1.5.4.1
--
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