diff mbox series

[v3,1/7] target: core: add common tpg/enable attribute

Message ID 20210409123238.26671-2-d.bogdanov@yadro.com (mailing list archive)
State New, archived
Headers show
Series target: make tpg/enable attribute | expand

Commit Message

Dmitry Bogdanov April 9, 2021, 12:32 p.m. UTC 
Many fabric modules provide their own implementation of enable
attribute in tpg.
The change provides a way to remove code duplication in the fabric
modules and automatically add "enable" attribute if a fabric module has
an implementation of fabric_enable_tpg() ops.

Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
---
v3:
 refactor tfc_tpg_base_attrs creation
 avoid alloc of attrs if there are no attributes
 fix newlines
 move enable attribute to target_core_fabric_configfs.c
v2:
 create enable atribute only for modules with enable_tpg ops
---
 drivers/target/target_core_configfs.c        |  3 +-
 drivers/target/target_core_fabric_configfs.c | 76 +++++++++++++++++++-
 include/target/target_core_base.h            |  1 +
 include/target/target_core_fabric.h          |  1 +
 4 files changed, 78 insertions(+), 3 deletions(-)

Comments

kernel test robot April 9, 2021, 6:48 p.m. UTC | #1 
Hi Dmitry,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v5.12-rc6]
[also build test ERROR on next-20210409]
[cannot apply to mkp-scsi/for-next scsi/for-next target/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Dmitry-Bogdanov/target-make-tpg-enable-attribute/20210409-204948
base:    e49d033bddf5b565044e2abe4241353959bc9120
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/05e500ae0f710beb2f952c2e99ab5d4fd2fce126
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Dmitry-Bogdanov/target-make-tpg-enable-attribute/20210409-204948
        git checkout 05e500ae0f710beb2f952c2e99ab5d4fd2fce126
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/target/target_core_fabric_configfs.c: In function 'target_fabric_setup_cits':
>> drivers/target/target_core_fabric_configfs.c:1047:2: error: 'ret' undeclared (first use in this function); did you mean 'net'?
    1047 |  ret = target_fabric_setup_tpg_base_cit(tf);
         |  ^~~
         |  net
   drivers/target/target_core_fabric_configfs.c:1047:2: note: each undeclared identifier is reported only once for each function it appears in


vim +1047 drivers/target/target_core_fabric_configfs.c

  1039	
  1040	int target_fabric_setup_cits(struct target_fabric_configfs *tf)
  1041	{
  1042		target_fabric_setup_discovery_cit(tf);
  1043		target_fabric_setup_wwn_cit(tf);
  1044		target_fabric_setup_wwn_fabric_stats_cit(tf);
  1045		target_fabric_setup_tpg_cit(tf);
  1046	
> 1047		ret = target_fabric_setup_tpg_base_cit(tf);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
kernel test robot April 9, 2021, 6:54 p.m. UTC | #2 
Hi Dmitry,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v5.12-rc6]
[also build test ERROR on next-20210409]
[cannot apply to mkp-scsi/for-next scsi/for-next target/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Dmitry-Bogdanov/target-make-tpg-enable-attribute/20210409-204948
base:    e49d033bddf5b565044e2abe4241353959bc9120
config: openrisc-randconfig-r035-20210409 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/05e500ae0f710beb2f952c2e99ab5d4fd2fce126
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Dmitry-Bogdanov/target-make-tpg-enable-attribute/20210409-204948
        git checkout 05e500ae0f710beb2f952c2e99ab5d4fd2fce126
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=openrisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/target/target_core_fabric_configfs.c: In function 'target_fabric_setup_cits':
>> drivers/target/target_core_fabric_configfs.c:1047:2: error: 'ret' undeclared (first use in this function); did you mean 'net'?
    1047 |  ret = target_fabric_setup_tpg_base_cit(tf);
         |  ^~~
         |  net
   drivers/target/target_core_fabric_configfs.c:1047:2: note: each undeclared identifier is reported only once for each function it appears in


vim +1047 drivers/target/target_core_fabric_configfs.c

  1039	
  1040	int target_fabric_setup_cits(struct target_fabric_configfs *tf)
  1041	{
  1042		target_fabric_setup_discovery_cit(tf);
  1043		target_fabric_setup_wwn_cit(tf);
  1044		target_fabric_setup_wwn_fabric_stats_cit(tf);
  1045		target_fabric_setup_tpg_cit(tf);
  1046	
> 1047		ret = target_fabric_setup_tpg_base_cit(tf);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index f04352285155..9cdfe352eef6 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -490,6 +490,7 @@  void target_unregister_template(const struct target_core_fabric_ops *fo)
 			 * fabric driver unload of TFO->module to proceed.
 			 */
 			rcu_barrier();
+			kfree(t->tf_tpg_base_cit.ct_attrs);
 			kfree(t);
 			return;
 		}
@@ -2232,7 +2233,7 @@  static ssize_t target_dev_enable_show(struct config_item *item, char *page)
 {
 	struct se_device *dev = to_device(item);
 
-	return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
+	return sysfs_emit(page, "%d\n", target_dev_configured(dev));
 }
 
 static ssize_t target_dev_enable_store(struct config_item *item,
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c
index ee85602213f7..e6b0f9257c58 100644
--- a/drivers/target/target_core_fabric_configfs.c
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -815,8 +815,76 @@  static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
 	.release		= target_fabric_tpg_release,
 };
 
-TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL);
+static ssize_t target_fabric_tpg_base_enable_show(struct config_item *item,
+						  char *page)
+{
+	return sprintf(page, "%d\n", to_tpg(item)->enabled);
+}
+
+static ssize_t target_fabric_tpg_base_enable_store(struct config_item *item,
+						   const char *page,
+						   size_t count)
+{
+	struct se_portal_group *se_tpg = to_tpg(item);
+	int ret;
+	bool op;
+
+	ret = strtobool(page, &op);
+	if (ret)
+		return ret;
+
+	if (se_tpg->enabled == op)
+		return count;
+
+	ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, op);
+	if (ret)
+		return ret;
+
+	se_tpg->enabled = op;
+
+	return count;
+}
 
+CONFIGFS_ATTR(target_fabric_tpg_base_, enable);
+
+static int
+target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf)
+{
+	struct config_item_type *cit = &tf->tf_tpg_base_cit;
+	struct configfs_attribute **attrs = NULL;
+	size_t nr_attrs = 0;
+	int i = 0;
+
+	if (tf->tf_ops->tfc_tpg_base_attrs)
+		while (tf->tf_ops->tfc_tpg_base_attrs[nr_attrs] != NULL)
+			nr_attrs++;
+
+	if (tf->tf_ops->fabric_enable_tpg)
+		nr_attrs++;
+
+	if (nr_attrs == 0)
+		goto done;
+
+	/* + 1 for final NULL in the array */
+	attrs = kcalloc(nr_attrs + 1, sizeof(*attrs), GFP_KERNEL);
+	if (!attrs)
+		return -ENOMEM;
+
+	if (tf->tf_ops->tfc_tpg_base_attrs)
+		for (; tf->tf_ops->tfc_tpg_base_attrs[i] != NULL; i++)
+			attrs[i] = tf->tf_ops->tfc_tpg_base_attrs[i];
+
+	if (tf->tf_ops->fabric_enable_tpg)
+		attrs[i] = &target_fabric_tpg_base_attr_enable;
+
+done:
+	cit->ct_item_ops = &target_fabric_tpg_base_item_ops;
+	cit->ct_attrs = attrs;
+	cit->ct_owner = tf->tf_ops->module;
+	pr_debug("Setup generic tpg_base\n");
+
+	return 0;
+}
 /* End of tfc_tpg_base_cit */
 
 /* Start of tfc_tpg_cit */
@@ -975,7 +1043,11 @@  int target_fabric_setup_cits(struct target_fabric_configfs *tf)
 	target_fabric_setup_wwn_cit(tf);
 	target_fabric_setup_wwn_fabric_stats_cit(tf);
 	target_fabric_setup_tpg_cit(tf);
-	target_fabric_setup_tpg_base_cit(tf);
+
+	ret = target_fabric_setup_tpg_base_cit(tf);
+	if (ret)
+		return ret;
+
 	target_fabric_setup_tpg_port_cit(tf);
 	target_fabric_setup_tpg_port_stat_cit(tf);
 	target_fabric_setup_tpg_lun_cit(tf);
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 54dcc0eb25fa..fabc9dccfeb2 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -885,6 +885,7 @@  struct se_portal_group {
 	 * Negative values can be used by fabric drivers for internal use TPGs.
 	 */
 	int			proto_id;
+	bool			enabled;
 	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 	atomic_t		tpg_pr_ref_count;
 	/* Spinlock for adding/removing ACLed Nodes */
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index d60a3eb7517a..b7e409e9e13e 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -89,6 +89,7 @@  struct target_core_fabric_ops {
 	void (*add_wwn_groups)(struct se_wwn *);
 	struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
 						   const char *);
+	int (*fabric_enable_tpg)(struct se_portal_group *se_tpg, bool enable);
 	void (*fabric_drop_tpg)(struct se_portal_group *);
 	int (*fabric_post_link)(struct se_portal_group *,
 				struct se_lun *);