configfs: switch ->default groups to a linked list
authorChristoph Hellwig <hch@lst.de>
Fri, 26 Feb 2016 10:02:14 +0000 (11:02 +0100)
committerChristoph Hellwig <hch@lst.de>
Sun, 6 Mar 2016 15:11:24 +0000 (16:11 +0100)
Replace the current NULL-terminated array of default groups with a linked
list.  This gets rid of lots of nasty code to size and/or dynamically
allocate the array.

While we're at it also provide a conveniant helper to remove the default
groups.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Felipe Balbi <balbi@kernel.org> [drivers/usb/gadget]
Acked-by: Joel Becker <jlbec@evilplan.org>
Acked-by: Nicholas Bellinger <nab@linux-iscsi.org>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
17 files changed:
Documentation/filesystems/configfs/configfs.txt
drivers/infiniband/core/cma_configfs.c
drivers/target/iscsi/iscsi_target_configfs.c
drivers/target/target_core_configfs.c
drivers/target/target_core_fabric_configfs.c
drivers/target/target_core_internal.h
drivers/target/target_core_stat.c
drivers/usb/gadget/configfs.c
drivers/usb/gadget/function/f_mass_storage.c
drivers/usb/gadget/function/f_rndis.c
drivers/usb/gadget/function/uvc_configfs.c
fs/configfs/dir.c
fs/configfs/item.c
fs/dlm/config.c
fs/ocfs2/cluster/nodemanager.c
include/linux/configfs.h
include/target/target_core_base.h

index e5fe521eea1d3b568404831efbbfc15bb935430c..8ec9136aae56cedb6de6d7b37d2e7df6ccef656b 100644 (file)
@@ -250,7 +250,8 @@ child item.
                struct config_item              cg_item;
                struct list_head                cg_children;
                struct configfs_subsystem       *cg_subsys;
-               struct config_group             **default_groups;
+               struct list_head                default_groups;
+               struct list_head                group_entry;
        };
 
        void config_group_init(struct config_group *group);
@@ -420,15 +421,15 @@ These automatic subgroups, or default groups, do not preclude other
 children of the parent group.  If ct_group_ops->make_group() exists,
 other child groups can be created on the parent group directly.
 
-A configfs subsystem specifies default groups by filling in the
-NULL-terminated array default_groups on the config_group structure.
-Each group in that array is populated in the configfs tree at the same
+A configfs subsystem specifies default groups by adding them using the
+configfs_add_default_group() function to the parent config_group
+structure.  Each added group is populated in the configfs tree at the same
 time as the parent group.  Similarly, they are removed at the same time
 as the parent.  No extra notification is provided.  When a ->drop_item()
 method call notifies the subsystem the parent group is going away, it
 also means every default group child associated with that parent group.
 
-As a consequence of this, default_groups cannot be removed directly via
+As a consequence of this, default groups cannot be removed directly via
 rmdir(2).  They also are not considered when rmdir(2) on the parent
 group is checking for children.
 
index 18b112aa577e5a260b3081bfa944b6b222074fa3..41573df1d9fcc6aae2b219918418bd1cb1f9bcc3 100644 (file)
@@ -49,8 +49,6 @@ struct cma_dev_group {
        char                            name[IB_DEVICE_NAME_MAX];
        struct config_group             device_group;
        struct config_group             ports_group;
-       struct config_group             *default_dev_group[2];
-       struct config_group             **default_ports_group;
        struct cma_dev_port_group       *ports;
 };
 
@@ -158,7 +156,6 @@ static int make_cma_ports(struct cma_dev_group *cma_dev_group,
        unsigned int i;
        unsigned int ports_num;
        struct cma_dev_port_group *ports;
-       struct config_group **ports_group;
        int err;
 
        ibdev = cma_get_ib_dev(cma_dev);
@@ -169,9 +166,8 @@ static int make_cma_ports(struct cma_dev_group *cma_dev_group,
        ports_num = ibdev->phys_port_cnt;
        ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports),
                        GFP_KERNEL);
-       ports_group = kcalloc(ports_num + 1, sizeof(*ports_group), GFP_KERNEL);
 
-       if (!ports || !ports_group) {
+       if (!ports) {
                err = -ENOMEM;
                goto free;
        }
@@ -185,18 +181,16 @@ static int make_cma_ports(struct cma_dev_group *cma_dev_group,
                config_group_init_type_name(&ports[i].group,
                                            port_str,
                                            &cma_port_group_type);
-               ports_group[i] = &ports[i].group;
+               configfs_add_default_group(&ports[i].group,
+                               &cma_dev_group->ports_group);
+
        }
-       ports_group[i] = NULL;
-       cma_dev_group->default_ports_group = ports_group;
        cma_dev_group->ports = ports;
 
        return 0;
 free:
        kfree(ports);
-       kfree(ports_group);
        cma_dev_group->ports = NULL;
-       cma_dev_group->default_ports_group = NULL;
        return err;
 }
 
@@ -220,9 +214,7 @@ static void release_cma_ports_group(struct config_item  *item)
                                                           ports_group);
 
        kfree(cma_dev_group->ports);
-       kfree(cma_dev_group->default_ports_group);
        cma_dev_group->ports = NULL;
-       cma_dev_group->default_ports_group = NULL;
 };
 
 static struct configfs_item_operations cma_ports_item_ops = {
@@ -263,22 +255,17 @@ static struct config_group *make_cma_dev(struct config_group *group,
 
        strncpy(cma_dev_group->name, name, sizeof(cma_dev_group->name));
 
-       err = make_cma_ports(cma_dev_group, cma_dev);
-       if (err)
-               goto fail;
-
-       cma_dev_group->ports_group.default_groups =
-               cma_dev_group->default_ports_group;
        config_group_init_type_name(&cma_dev_group->ports_group, "ports",
                                    &cma_ports_group_type);
 
-       cma_dev_group->device_group.default_groups
-               = cma_dev_group->default_dev_group;
-       cma_dev_group->default_dev_group[0] = &cma_dev_group->ports_group;
-       cma_dev_group->default_dev_group[1] = NULL;
+       err = make_cma_ports(cma_dev_group, cma_dev);
+       if (err)
+               goto fail;
 
        config_group_init_type_name(&cma_dev_group->device_group, name,
                                    &cma_device_group_type);
+       configfs_add_default_group(&cma_dev_group->ports_group,
+                       &cma_dev_group->device_group);
 
        cma_deref_dev(cma_dev);
        return &cma_dev_group->device_group;
index 2f821de6304985d552fba6f2d68cdd9f49707b7c..a24443ba59ea04e452674403d014e507ea44b4d6 100644 (file)
@@ -771,21 +771,11 @@ static int lio_target_init_nodeacl(struct se_node_acl *se_nacl,
 {
        struct iscsi_node_acl *acl =
                container_of(se_nacl, struct iscsi_node_acl, se_node_acl);
-       struct config_group *stats_cg = &se_nacl->acl_fabric_stat_group;
-
-       stats_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                               GFP_KERNEL);
-       if (!stats_cg->default_groups) {
-               pr_err("Unable to allocate memory for"
-                               " stats_cg->default_groups\n");
-               return -ENOMEM;
-       }
 
-       stats_cg->default_groups[0] = &acl->node_stat_grps.iscsi_sess_stats_group;
-       stats_cg->default_groups[1] = NULL;
        config_group_init_type_name(&acl->node_stat_grps.iscsi_sess_stats_group,
                        "iscsi_sess_stats", &iscsi_stat_sess_cit);
-
+       configfs_add_default_group(&acl->node_stat_grps.iscsi_sess_stats_group,
+                       &se_nacl->acl_fabric_stat_group);
        return 0;
 }
 
@@ -793,17 +783,8 @@ static void lio_target_cleanup_nodeacl( struct se_node_acl *se_nacl)
 {
        struct iscsi_node_acl *acl = container_of(se_nacl,
                        struct iscsi_node_acl, se_node_acl);
-       struct config_item *df_item;
-       struct config_group *stats_cg;
-       int i;
-
-       stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
-       for (i = 0; stats_cg->default_groups[i]; i++) {
-               df_item = &stats_cg->default_groups[i]->cg_item;
-               stats_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(stats_cg->default_groups);
+
+       configfs_remove_default_groups(&acl->se_node_acl.acl_fabric_stat_group);
 }
 
 /* End items for lio_target_acl_cit */
@@ -1260,42 +1241,37 @@ static struct se_wwn *lio_target_call_coreaddtiqn(
        struct config_group *group,
        const char *name)
 {
-       struct config_group *stats_cg;
        struct iscsi_tiqn *tiqn;
 
        tiqn = iscsit_add_tiqn((unsigned char *)name);
        if (IS_ERR(tiqn))
                return ERR_CAST(tiqn);
-       /*
-        * Setup struct iscsi_wwn_stat_grps for se_wwn->fabric_stat_group.
-        */
-       stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
-
-       stats_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
-                               GFP_KERNEL);
-       if (!stats_cg->default_groups) {
-               pr_err("Unable to allocate memory for"
-                               " stats_cg->default_groups\n");
-               iscsit_del_tiqn(tiqn);
-               return ERR_PTR(-ENOMEM);
-       }
 
-       stats_cg->default_groups[0] = &tiqn->tiqn_stat_grps.iscsi_instance_group;
-       stats_cg->default_groups[1] = &tiqn->tiqn_stat_grps.iscsi_sess_err_group;
-       stats_cg->default_groups[2] = &tiqn->tiqn_stat_grps.iscsi_tgt_attr_group;
-       stats_cg->default_groups[3] = &tiqn->tiqn_stat_grps.iscsi_login_stats_group;
-       stats_cg->default_groups[4] = &tiqn->tiqn_stat_grps.iscsi_logout_stats_group;
-       stats_cg->default_groups[5] = NULL;
        config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_instance_group,
                        "iscsi_instance", &iscsi_stat_instance_cit);
+       configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_instance_group,
+                       &tiqn->tiqn_wwn.fabric_stat_group);
+
        config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_sess_err_group,
                        "iscsi_sess_err", &iscsi_stat_sess_err_cit);
+       configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_sess_err_group,
+                       &tiqn->tiqn_wwn.fabric_stat_group);
+
        config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_tgt_attr_group,
                        "iscsi_tgt_attr", &iscsi_stat_tgt_attr_cit);
+       configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_tgt_attr_group,
+                       &tiqn->tiqn_wwn.fabric_stat_group);
+
        config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_login_stats_group,
                        "iscsi_login_stats", &iscsi_stat_login_cit);
+       configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_login_stats_group,
+                       &tiqn->tiqn_wwn.fabric_stat_group);
+
        config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_logout_stats_group,
                        "iscsi_logout_stats", &iscsi_stat_logout_cit);
+       configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_logout_stats_group,
+                       &tiqn->tiqn_wwn.fabric_stat_group);
+
 
        pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
        pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated Node:"
@@ -1307,17 +1283,8 @@ static void lio_target_call_coredeltiqn(
        struct se_wwn *wwn)
 {
        struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
-       struct config_item *df_item;
-       struct config_group *stats_cg;
-       int i;
-
-       stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
-       for (i = 0; stats_cg->default_groups[i]; i++) {
-               df_item = &stats_cg->default_groups[i]->cg_item;
-               stats_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(stats_cg->default_groups);
+
+       configfs_remove_default_groups(&tiqn->tiqn_wwn.fabric_stat_group);
 
        pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s\n",
                        tiqn->tiqn);
index 713c63d9681b3cf4e413cb50f93cd466adb8520c..d498533f09ee469d1cc82944cabd75bb525f94b3 100644 (file)
@@ -194,13 +194,11 @@ static struct config_group *target_core_register_fabric(
        pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
                        &tf->tf_wwn_cit);
 
-       tf->tf_group.default_groups = tf->tf_default_groups;
-       tf->tf_group.default_groups[0] = &tf->tf_disc_group;
-       tf->tf_group.default_groups[1] = NULL;
-
        config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
+
        config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
                        &tf->tf_discovery_cit);
+       configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
 
        pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
                        " %s\n", tf->tf_group.cg_item.ci_name);
@@ -216,9 +214,6 @@ static void target_core_deregister_fabric(
 {
        struct target_fabric_configfs *tf = container_of(
                to_config_group(item), struct target_fabric_configfs, tf_group);
-       struct config_group *tf_group;
-       struct config_item *df_item;
-       int i;
 
        pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
                " tf list\n", config_item_name(item));
@@ -230,12 +225,7 @@ static void target_core_deregister_fabric(
        pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
                        " %s\n", config_item_name(item));
 
-       tf_group = &tf->tf_group;
-       for (i = 0; tf_group->default_groups[i]; i++) {
-               df_item = &tf_group->default_groups[i]->cg_item;
-               tf_group->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
+       configfs_remove_default_groups(&tf->tf_group);
        config_item_put(item);
 }
 
@@ -2151,7 +2141,6 @@ static void target_core_dev_release(struct config_item *item)
        struct se_device *dev =
                container_of(dev_cg, struct se_device, dev_group);
 
-       kfree(dev_cg->default_groups);
        target_free_device(dev);
 }
 
@@ -2819,8 +2808,6 @@ static struct config_group *target_core_make_subdev(
        struct se_hba *hba = item_to_hba(hba_ci);
        struct target_backend *tb = hba->backend;
        struct se_device *dev;
-       struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
-       struct config_group *dev_stat_grp = NULL;
        int errno = -ENOMEM, ret;
 
        ret = mutex_lock_interruptible(&hba->hba_access_mutex);
@@ -2831,73 +2818,52 @@ static struct config_group *target_core_make_subdev(
        if (!dev)
                goto out_unlock;
 
-       dev_cg = &dev->dev_group;
-
-       dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
-                       GFP_KERNEL);
-       if (!dev_cg->default_groups)
-               goto out_free_device;
+       config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
 
-       config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
        config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
                        &tb->tb_dev_attrib_cit);
+       configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
+
        config_group_init_type_name(&dev->dev_pr_group, "pr",
                        &tb->tb_dev_pr_cit);
+       configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
+
        config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
                        &tb->tb_dev_wwn_cit);
+       configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
+                       &dev->dev_group);
+
        config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
                        "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
+       configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
+                       &dev->dev_group);
+
        config_group_init_type_name(&dev->dev_stat_grps.stat_group,
                        "statistics", &tb->tb_dev_stat_cit);
+       configfs_add_default_group(&dev->dev_stat_grps.stat_group,
+                       &dev->dev_group);
 
-       dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
-       dev_cg->default_groups[1] = &dev->dev_pr_group;
-       dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
-       dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
-       dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
-       dev_cg->default_groups[5] = NULL;
        /*
         * Add core/$HBA/$DEV/alua/default_tg_pt_gp
         */
        tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
        if (!tg_pt_gp)
-               goto out_free_dev_cg_default_groups;
+               goto out_free_device;
        dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
 
-       tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
-       tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                               GFP_KERNEL);
-       if (!tg_pt_gp_cg->default_groups) {
-               pr_err("Unable to allocate tg_pt_gp_cg->"
-                               "default_groups\n");
-               goto out_free_tg_pt_gp;
-       }
-
        config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
                        "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
-       tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
-       tg_pt_gp_cg->default_groups[1] = NULL;
+       configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
+                       &dev->t10_alua.alua_tg_pt_gps_group);
+
        /*
         * Add core/$HBA/$DEV/statistics/ default groups
         */
-       dev_stat_grp = &dev->dev_stat_grps.stat_group;
-       dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
-                               GFP_KERNEL);
-       if (!dev_stat_grp->default_groups) {
-               pr_err("Unable to allocate dev_stat_grp->default_groups\n");
-               goto out_free_tg_pt_gp_cg_default_groups;
-       }
        target_stat_setup_dev_default_groups(dev);
 
        mutex_unlock(&hba->hba_access_mutex);
-       return dev_cg;
+       return &dev->dev_group;
 
-out_free_tg_pt_gp_cg_default_groups:
-       kfree(tg_pt_gp_cg->default_groups);
-out_free_tg_pt_gp:
-       core_alua_free_tg_pt_gp(tg_pt_gp);
-out_free_dev_cg_default_groups:
-       kfree(dev_cg->default_groups);
 out_free_device:
        target_free_device(dev);
 out_unlock:
@@ -2913,40 +2879,22 @@ static void target_core_drop_subdev(
        struct se_device *dev =
                container_of(dev_cg, struct se_device, dev_group);
        struct se_hba *hba;
-       struct config_item *df_item;
-       struct config_group *tg_pt_gp_cg, *dev_stat_grp;
-       int i;
 
        hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
 
        mutex_lock(&hba->hba_access_mutex);
 
-       dev_stat_grp = &dev->dev_stat_grps.stat_group;
-       for (i = 0; dev_stat_grp->default_groups[i]; i++) {
-               df_item = &dev_stat_grp->default_groups[i]->cg_item;
-               dev_stat_grp->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(dev_stat_grp->default_groups);
+       configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
+       configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
 
-       tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
-       for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
-               df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
-               tg_pt_gp_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(tg_pt_gp_cg->default_groups);
        /*
         * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
         * directly from target_core_alua_tg_pt_gp_release().
         */
        dev->t10_alua.default_tg_pt_gp = NULL;
 
-       for (i = 0; dev_cg->default_groups[i]; i++) {
-               df_item = &dev_cg->default_groups[i]->cg_item;
-               dev_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
+       configfs_remove_default_groups(dev_cg);
+
        /*
         * se_dev is released from target_core_dev_item_ops->release()
         */
@@ -3141,8 +3089,6 @@ void target_setup_backend_cits(struct target_backend *tb)
 
 static int __init target_core_init_configfs(void)
 {
-       struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
-       struct config_group *lu_gp_cg = NULL;
        struct configfs_subsystem *subsys = &target_core_fabrics;
        struct t10_alua_lu_gp *lu_gp;
        int ret;
@@ -3161,51 +3107,24 @@ static int __init target_core_init_configfs(void)
         * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
         * and ALUA Logical Unit Group and Target Port Group infrastructure.
         */
-       target_cg = &subsys->su_group;
-       target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                               GFP_KERNEL);
-       if (!target_cg->default_groups) {
-               pr_err("Unable to allocate target_cg->default_groups\n");
-               ret = -ENOMEM;
-               goto out_global;
-       }
+       config_group_init_type_name(&target_core_hbagroup, "core",
+                       &target_core_cit);
+       configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
 
-       config_group_init_type_name(&target_core_hbagroup,
-                       "core", &target_core_cit);
-       target_cg->default_groups[0] = &target_core_hbagroup;
-       target_cg->default_groups[1] = NULL;
        /*
         * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
         */
-       hba_cg = &target_core_hbagroup;
-       hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                               GFP_KERNEL);
-       if (!hba_cg->default_groups) {
-               pr_err("Unable to allocate hba_cg->default_groups\n");
-               ret = -ENOMEM;
-               goto out_global;
-       }
-       config_group_init_type_name(&alua_group,
-                       "alua", &target_core_alua_cit);
-       hba_cg->default_groups[0] = &alua_group;
-       hba_cg->default_groups[1] = NULL;
+       config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
+       configfs_add_default_group(&alua_group, &target_core_hbagroup);
+
        /*
         * Add ALUA Logical Unit Group and Target Port Group ConfigFS
         * groups under /sys/kernel/config/target/core/alua/
         */
-       alua_cg = &alua_group;
-       alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                       GFP_KERNEL);
-       if (!alua_cg->default_groups) {
-               pr_err("Unable to allocate alua_cg->default_groups\n");
-               ret = -ENOMEM;
-               goto out_global;
-       }
+       config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
+                       &target_core_alua_lu_gps_cit);
+       configfs_add_default_group(&alua_lu_gps_group, &alua_group);
 
-       config_group_init_type_name(&alua_lu_gps_group,
-                       "lu_gps", &target_core_alua_lu_gps_cit);
-       alua_cg->default_groups[0] = &alua_lu_gps_group;
-       alua_cg->default_groups[1] = NULL;
        /*
         * Add core/alua/lu_gps/default_lu_gp
         */
@@ -3215,20 +3134,12 @@ static int __init target_core_init_configfs(void)
                goto out_global;
        }
 
-       lu_gp_cg = &alua_lu_gps_group;
-       lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                       GFP_KERNEL);
-       if (!lu_gp_cg->default_groups) {
-               pr_err("Unable to allocate lu_gp_cg->default_groups\n");
-               ret = -ENOMEM;
-               goto out_global;
-       }
-
        config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
                                &target_core_alua_lu_gp_cit);
-       lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
-       lu_gp_cg->default_groups[1] = NULL;
+       configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
+
        default_lu_gp = lu_gp;
+
        /*
         * Register the target_core_mod subsystem with configfs.
         */
@@ -3267,55 +3178,21 @@ out_global:
                core_alua_free_lu_gp(default_lu_gp);
                default_lu_gp = NULL;
        }
-       if (lu_gp_cg)
-               kfree(lu_gp_cg->default_groups);
-       if (alua_cg)
-               kfree(alua_cg->default_groups);
-       if (hba_cg)
-               kfree(hba_cg->default_groups);
-       kfree(target_cg->default_groups);
        release_se_kmem_caches();
        return ret;
 }
 
 static void __exit target_core_exit_configfs(void)
 {
-       struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
-       struct config_item *item;
-       int i;
+       configfs_remove_default_groups(&alua_lu_gps_group);
+       configfs_remove_default_groups(&alua_group);
+       configfs_remove_default_groups(&target_core_hbagroup);
 
-       lu_gp_cg = &alua_lu_gps_group;
-       for (i = 0; lu_gp_cg->default_groups[i]; i++) {
-               item = &lu_gp_cg->default_groups[i]->cg_item;
-               lu_gp_cg->default_groups[i] = NULL;
-               config_item_put(item);
-       }
-       kfree(lu_gp_cg->default_groups);
-       lu_gp_cg->default_groups = NULL;
-
-       alua_cg = &alua_group;
-       for (i = 0; alua_cg->default_groups[i]; i++) {
-               item = &alua_cg->default_groups[i]->cg_item;
-               alua_cg->default_groups[i] = NULL;
-               config_item_put(item);
-       }
-       kfree(alua_cg->default_groups);
-       alua_cg->default_groups = NULL;
-
-       hba_cg = &target_core_hbagroup;
-       for (i = 0; hba_cg->default_groups[i]; i++) {
-               item = &hba_cg->default_groups[i]->cg_item;
-               hba_cg->default_groups[i] = NULL;
-               config_item_put(item);
-       }
-       kfree(hba_cg->default_groups);
-       hba_cg->default_groups = NULL;
        /*
         * We expect subsys->su_group.default_groups to be released
         * by configfs subsystem provider logic..
         */
        configfs_unregister_subsystem(&target_core_fabrics);
-       kfree(target_core_fabrics.su_group.default_groups);
 
        core_alua_free_lu_gp(default_lu_gp);
        default_lu_gp = NULL;
index f916d18ccb487c0910ec79ec3f0d8dda232a7b30..8caef31da415bc88606a286928303be624ecbd7a 100644 (file)
@@ -273,18 +273,10 @@ static struct config_group *target_fabric_make_mappedlun(
        struct se_portal_group *se_tpg = se_nacl->se_tpg;
        struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
        struct se_lun_acl *lacl = NULL;
-       struct config_item *acl_ci;
-       struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
        char *buf;
        unsigned long long mapped_lun;
        int ret = 0;
 
-       acl_ci = &group->cg_item;
-       if (!acl_ci) {
-               pr_err("Unable to locatel acl_ci\n");
-               return NULL;
-       }
-
        buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
        if (!buf) {
                pr_err("Unable to allocate memory for name buf\n");
@@ -315,37 +307,19 @@ static struct config_group *target_fabric_make_mappedlun(
                goto out;
        }
 
-       lacl_cg = &lacl->se_lun_group;
-       lacl_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                               GFP_KERNEL);
-       if (!lacl_cg->default_groups) {
-               pr_err("Unable to allocate lacl_cg->default_groups\n");
-               ret = -ENOMEM;
-               goto out;
-       }
-
        config_group_init_type_name(&lacl->se_lun_group, name,
                        &tf->tf_tpg_mappedlun_cit);
+
        config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
                        "statistics", &tf->tf_tpg_mappedlun_stat_cit);
-       lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
-       lacl_cg->default_groups[1] = NULL;
-
-       ml_stat_grp = &lacl->ml_stat_grps.stat_group;
-       ml_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 3,
-                               GFP_KERNEL);
-       if (!ml_stat_grp->default_groups) {
-               pr_err("Unable to allocate ml_stat_grp->default_groups\n");
-               ret = -ENOMEM;
-               goto out;
-       }
+       configfs_add_default_group(&lacl->ml_stat_grps.stat_group,
+                       &lacl->se_lun_group);
+
        target_stat_setup_mappedlun_default_groups(lacl);
 
        kfree(buf);
        return &lacl->se_lun_group;
 out:
-       if (lacl_cg)
-               kfree(lacl_cg->default_groups);
        kfree(lacl);
        kfree(buf);
        return ERR_PTR(ret);
@@ -357,25 +331,9 @@ static void target_fabric_drop_mappedlun(
 {
        struct se_lun_acl *lacl = container_of(to_config_group(item),
                        struct se_lun_acl, se_lun_group);
-       struct config_item *df_item;
-       struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
-       int i;
-
-       ml_stat_grp = &lacl->ml_stat_grps.stat_group;
-       for (i = 0; ml_stat_grp->default_groups[i]; i++) {
-               df_item = &ml_stat_grp->default_groups[i]->cg_item;
-               ml_stat_grp->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(ml_stat_grp->default_groups);
 
-       lacl_cg = &lacl->se_lun_group;
-       for (i = 0; lacl_cg->default_groups[i]; i++) {
-               df_item = &lacl_cg->default_groups[i]->cg_item;
-               lacl_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(lacl_cg->default_groups);
+       configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group);
+       configfs_remove_default_groups(&lacl->se_lun_group);
 
        config_item_put(item);
 }
@@ -424,7 +382,6 @@ static struct config_group *target_fabric_make_nodeacl(
                        struct se_portal_group, tpg_acl_group);
        struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
        struct se_node_acl *se_nacl;
-       struct config_group *nacl_cg;
 
        se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name);
        if (IS_ERR(se_nacl))
@@ -438,24 +395,28 @@ static struct config_group *target_fabric_make_nodeacl(
                }
        }
 
-       nacl_cg = &se_nacl->acl_group;
-       nacl_cg->default_groups = se_nacl->acl_default_groups;
-       nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
-       nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
-       nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
-       nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
-       nacl_cg->default_groups[4] = NULL;
-
        config_group_init_type_name(&se_nacl->acl_group, name,
                        &tf->tf_tpg_nacl_base_cit);
+
        config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
                        &tf->tf_tpg_nacl_attrib_cit);
+       configfs_add_default_group(&se_nacl->acl_attrib_group,
+                       &se_nacl->acl_group);
+
        config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
                        &tf->tf_tpg_nacl_auth_cit);
+       configfs_add_default_group(&se_nacl->acl_auth_group,
+                       &se_nacl->acl_group);
+
        config_group_init_type_name(&se_nacl->acl_param_group, "param",
                        &tf->tf_tpg_nacl_param_cit);
+       configfs_add_default_group(&se_nacl->acl_param_group,
+                       &se_nacl->acl_group);
+
        config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
                        "fabric_statistics", &tf->tf_tpg_nacl_stat_cit);
+       configfs_add_default_group(&se_nacl->acl_fabric_stat_group,
+                       &se_nacl->acl_group);
 
        return &se_nacl->acl_group;
 }
@@ -466,16 +427,9 @@ static void target_fabric_drop_nodeacl(
 {
        struct se_node_acl *se_nacl = container_of(to_config_group(item),
                        struct se_node_acl, acl_group);
-       struct config_item *df_item;
-       struct config_group *nacl_cg;
-       int i;
-
-       nacl_cg = &se_nacl->acl_group;
-       for (i = 0; nacl_cg->default_groups[i]; i++) {
-               df_item = &nacl_cg->default_groups[i]->cg_item;
-               nacl_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
+
+       configfs_remove_default_groups(&se_nacl->acl_group);
+
        /*
         * struct se_node_acl free is done in target_fabric_nacl_base_release()
         */
@@ -795,7 +749,6 @@ static struct config_group *target_fabric_make_lun(
        struct se_portal_group *se_tpg = container_of(group,
                        struct se_portal_group, tpg_lun_group);
        struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
-       struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
        unsigned long long unpacked_lun;
        int errno;
 
@@ -812,31 +765,14 @@ static struct config_group *target_fabric_make_lun(
        if (IS_ERR(lun))
                return ERR_CAST(lun);
 
-       lun_cg = &lun->lun_group;
-       lun_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
-                               GFP_KERNEL);
-       if (!lun_cg->default_groups) {
-               pr_err("Unable to allocate lun_cg->default_groups\n");
-               kfree(lun);
-               return ERR_PTR(-ENOMEM);
-       }
-
        config_group_init_type_name(&lun->lun_group, name,
                        &tf->tf_tpg_port_cit);
+
        config_group_init_type_name(&lun->port_stat_grps.stat_group,
                        "statistics", &tf->tf_tpg_port_stat_cit);
-       lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
-       lun_cg->default_groups[1] = NULL;
-
-       port_stat_grp = &lun->port_stat_grps.stat_group;
-       port_stat_grp->default_groups =  kzalloc(sizeof(struct config_group *) * 4,
-                               GFP_KERNEL);
-       if (!port_stat_grp->default_groups) {
-               pr_err("Unable to allocate port_stat_grp->default_groups\n");
-               kfree(lun_cg->default_groups);
-               kfree(lun);
-               return ERR_PTR(-ENOMEM);
-       }
+       configfs_add_default_group(&lun->port_stat_grps.stat_group,
+                       &lun->lun_group);
+
        target_stat_setup_port_default_groups(lun);
 
        return &lun->lun_group;
@@ -848,25 +784,9 @@ static void target_fabric_drop_lun(
 {
        struct se_lun *lun = container_of(to_config_group(item),
                                struct se_lun, lun_group);
-       struct config_item *df_item;
-       struct config_group *lun_cg, *port_stat_grp;
-       int i;
-
-       port_stat_grp = &lun->port_stat_grps.stat_group;
-       for (i = 0; port_stat_grp->default_groups[i]; i++) {
-               df_item = &port_stat_grp->default_groups[i]->cg_item;
-               port_stat_grp->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(port_stat_grp->default_groups);
 
-       lun_cg = &lun->lun_group;
-       for (i = 0; lun_cg->default_groups[i]; i++) {
-               df_item = &lun_cg->default_groups[i]->cg_item;
-               lun_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
-       kfree(lun_cg->default_groups);
+       configfs_remove_default_groups(&lun->port_stat_grps.stat_group);
+       configfs_remove_default_groups(&lun->lun_group);
 
        config_item_put(item);
 }
@@ -922,32 +842,39 @@ static struct config_group *target_fabric_make_tpg(
        se_tpg = tf->tf_ops->fabric_make_tpg(wwn, group, name);
        if (!se_tpg || IS_ERR(se_tpg))
                return ERR_PTR(-EINVAL);
-       /*
-        * Setup default groups from pre-allocated se_tpg->tpg_default_groups
-        */
-       se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
-       se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
-       se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
-       se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
-       se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
-       se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_auth_group;
-       se_tpg->tpg_group.default_groups[5] = &se_tpg->tpg_param_group;
-       se_tpg->tpg_group.default_groups[6] = NULL;
 
        config_group_init_type_name(&se_tpg->tpg_group, name,
                        &tf->tf_tpg_base_cit);
+
        config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
                        &tf->tf_tpg_lun_cit);
+       configfs_add_default_group(&se_tpg->tpg_lun_group,
+                       &se_tpg->tpg_group);
+
        config_group_init_type_name(&se_tpg->tpg_np_group, "np",
                        &tf->tf_tpg_np_cit);
+       configfs_add_default_group(&se_tpg->tpg_np_group,
+                       &se_tpg->tpg_group);
+
        config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
                        &tf->tf_tpg_nacl_cit);
+       configfs_add_default_group(&se_tpg->tpg_acl_group,
+                       &se_tpg->tpg_group);
+
        config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
                        &tf->tf_tpg_attrib_cit);
+       configfs_add_default_group(&se_tpg->tpg_attrib_group,
+                       &se_tpg->tpg_group);
+
        config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
                        &tf->tf_tpg_auth_cit);
+       configfs_add_default_group(&se_tpg->tpg_auth_group,
+                       &se_tpg->tpg_group);
+
        config_group_init_type_name(&se_tpg->tpg_param_group, "param",
                        &tf->tf_tpg_param_cit);
+       configfs_add_default_group(&se_tpg->tpg_param_group,
+                       &se_tpg->tpg_group);
 
        return &se_tpg->tpg_group;
 }
@@ -958,19 +885,8 @@ static void target_fabric_drop_tpg(
 {
        struct se_portal_group *se_tpg = container_of(to_config_group(item),
                                struct se_portal_group, tpg_group);
-       struct config_group *tpg_cg = &se_tpg->tpg_group;
-       struct config_item *df_item;
-       int i;
-       /*
-        * Release default groups, but do not release tpg_cg->default_groups
-        * memory as it is statically allocated at se_tpg->tpg_default_groups.
-        */
-       for (i = 0; tpg_cg->default_groups[i]; i++) {
-               df_item = &tpg_cg->default_groups[i]->cg_item;
-               tpg_cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
 
+       configfs_remove_default_groups(&se_tpg->tpg_group);
        config_item_put(item);
 }
 
@@ -1026,16 +942,12 @@ static struct config_group *target_fabric_make_wwn(
                return ERR_PTR(-EINVAL);
 
        wwn->wwn_tf = tf;
-       /*
-        * Setup default groups from pre-allocated wwn->wwn_default_groups
-        */
-       wwn->wwn_group.default_groups = wwn->wwn_default_groups;
-       wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
-       wwn->wwn_group.default_groups[1] = NULL;
 
        config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit);
+
        config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
                        &tf->tf_wwn_fabric_stats_cit);
+       configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group);
 
        return &wwn->wwn_group;
 }
@@ -1046,16 +958,8 @@ static void target_fabric_drop_wwn(
 {
        struct se_wwn *wwn = container_of(to_config_group(item),
                                struct se_wwn, wwn_group);
-       struct config_item *df_item;
-       struct config_group *cg = &wwn->wwn_group;
-       int i;
-
-       for (i = 0; cg->default_groups[i]; i++) {
-               df_item = &cg->default_groups[i]->cg_item;
-               cg->default_groups[i] = NULL;
-               config_item_put(df_item);
-       }
 
+       configfs_remove_default_groups(&wwn->wwn_group);
        config_item_put(item);
 }
 
index db4412fe6b8a3f9ba73d46fadb11dcf1bf40980b..4a7cf499cdfa242f2c164bf1d494276319d1b05f 100644 (file)
@@ -22,7 +22,6 @@ struct target_fabric_configfs {
        struct list_head        tf_list;
        struct config_group     tf_group;
        struct config_group     tf_disc_group;
-       struct config_group     *tf_default_groups[2];
        const struct target_core_fabric_ops *tf_ops;
 
        struct config_item_type tf_discovery_cit;
index 81a6b3e07687232df9b2bba5d77c1caf01d6c6e8..1a39033d2bffaa84e72eac485811656d1a3bb6d5 100644 (file)
@@ -407,19 +407,20 @@ static struct config_item_type target_stat_scsi_lu_cit = {
  */
 void target_stat_setup_dev_default_groups(struct se_device *dev)
 {
-       struct config_group *dev_stat_grp = &dev->dev_stat_grps.stat_group;
-
        config_group_init_type_name(&dev->dev_stat_grps.scsi_dev_group,
                        "scsi_dev", &target_stat_scsi_dev_cit);
+       configfs_add_default_group(&dev->dev_stat_grps.scsi_dev_group,
+                       &dev->dev_stat_grps.stat_group);
+
        config_group_init_type_name(&dev->dev_stat_grps.scsi_tgt_dev_group,
                        "scsi_tgt_dev", &target_stat_scsi_tgt_dev_cit);
+       configfs_add_default_group(&dev->dev_stat_grps.scsi_tgt_dev_group,
+                       &dev->dev_stat_grps.stat_group);
+
        config_group_init_type_name(&dev->dev_stat_grps.scsi_lu_group,
                        "scsi_lu", &target_stat_scsi_lu_cit);
-
-       dev_stat_grp->default_groups[0] = &dev->dev_stat_grps.scsi_dev_group;
-       dev_stat_grp->default_groups[1] = &dev->dev_stat_grps.scsi_tgt_dev_group;
-       dev_stat_grp->default_groups[2] = &dev->dev_stat_grps.scsi_lu_group;
-       dev_stat_grp->default_groups[3] = NULL;
+       configfs_add_default_group(&dev->dev_stat_grps.scsi_lu_group,
+                       &dev->dev_stat_grps.stat_group);
 }
 
 /*
@@ -818,19 +819,20 @@ static struct config_item_type target_stat_scsi_transport_cit = {
  */
 void target_stat_setup_port_default_groups(struct se_lun *lun)
 {
-       struct config_group *port_stat_grp = &lun->port_stat_grps.stat_group;
-
        config_group_init_type_name(&lun->port_stat_grps.scsi_port_group,
                        "scsi_port", &target_stat_scsi_port_cit);
+       configfs_add_default_group(&lun->port_stat_grps.scsi_port_group,
+                       &lun->port_stat_grps.stat_group);
+
        config_group_init_type_name(&lun->port_stat_grps.scsi_tgt_port_group,
                        "scsi_tgt_port", &target_stat_scsi_tgt_port_cit);
+       configfs_add_default_group(&lun->port_stat_grps.scsi_tgt_port_group,
+                       &lun->port_stat_grps.stat_group);
+
        config_group_init_type_name(&lun->port_stat_grps.scsi_transport_group,
                        "scsi_transport", &target_stat_scsi_transport_cit);
-
-       port_stat_grp->default_groups[0] = &lun->port_stat_grps.scsi_port_group;
-       port_stat_grp->default_groups[1] = &lun->port_stat_grps.scsi_tgt_port_group;
-       port_stat_grp->default_groups[2] = &lun->port_stat_grps.scsi_transport_group;
-       port_stat_grp->default_groups[3] = NULL;
+       configfs_add_default_group(&lun->port_stat_grps.scsi_transport_group,
+                       &lun->port_stat_grps.stat_group);
 }
 
 /*
@@ -1351,14 +1353,13 @@ static struct config_item_type target_stat_scsi_att_intr_port_cit = {
  */
 void target_stat_setup_mappedlun_default_groups(struct se_lun_acl *lacl)
 {
-       struct config_group *ml_stat_grp = &lacl->ml_stat_grps.stat_group;
-
        config_group_init_type_name(&lacl->ml_stat_grps.scsi_auth_intr_group,
                        "scsi_auth_intr", &target_stat_scsi_auth_intr_cit);
+       configfs_add_default_group(&lacl->ml_stat_grps.scsi_auth_intr_group,
+                       &lacl->ml_stat_grps.stat_group);
+
        config_group_init_type_name(&lacl->ml_stat_grps.scsi_att_intr_port_group,
                        "scsi_att_intr_port", &target_stat_scsi_att_intr_port_cit);
-
-       ml_stat_grp->default_groups[0] = &lacl->ml_stat_grps.scsi_auth_intr_group;
-       ml_stat_grp->default_groups[1] = &lacl->ml_stat_grps.scsi_att_intr_port_group;
-       ml_stat_grp->default_groups[2] = NULL;
+       configfs_add_default_group(&lacl->ml_stat_grps.scsi_att_intr_port_group,
+                       &lacl->ml_stat_grps.stat_group);
 }
index 590c44989e5eb3dee6f751dc6ce109357eed19f6..2f8081f0f7958574b9bf09874ff483e2a153688a 100644 (file)
@@ -49,7 +49,6 @@ struct gadget_info {
        struct config_group configs_group;
        struct config_group strings_group;
        struct config_group os_desc_group;
-       struct config_group *default_groups[5];
 
        struct mutex lock;
        struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1];
@@ -71,7 +70,6 @@ static inline struct gadget_info *to_gadget_info(struct config_item *item)
 struct config_usb_cfg {
        struct config_group group;
        struct config_group strings_group;
-       struct config_group *default_groups[2];
        struct list_head string_list;
        struct usb_configuration c;
        struct list_head func_list;
@@ -666,13 +664,12 @@ static struct config_group *config_desc_make(
        INIT_LIST_HEAD(&cfg->string_list);
        INIT_LIST_HEAD(&cfg->func_list);
 
-       cfg->group.default_groups = cfg->default_groups;
-       cfg->default_groups[0] = &cfg->strings_group;
-
        config_group_init_type_name(&cfg->group, name,
                                &gadget_config_type);
+
        config_group_init_type_name(&cfg->strings_group, "strings",
                        &gadget_config_name_strings_type);
+       configfs_add_default_group(&cfg->strings_group, &cfg->group);
 
        ret = usb_add_config_only(&gi->cdev, &cfg->c);
        if (ret)
@@ -1149,15 +1146,11 @@ int usb_os_desc_prepare_interf_dir(struct config_group *parent,
                                   char **names,
                                   struct module *owner)
 {
-       struct config_group **f_default_groups, *os_desc_group,
-                               **interface_groups;
+       struct config_group *os_desc_group;
        struct config_item_type *os_desc_type, *interface_type;
 
        vla_group(data_chunk);
-       vla_item(data_chunk, struct config_group *, f_default_groups, 2);
        vla_item(data_chunk, struct config_group, os_desc_group, 1);
-       vla_item(data_chunk, struct config_group *, interface_groups,
-                n_interf + 1);
        vla_item(data_chunk, struct config_item_type, os_desc_type, 1);
        vla_item(data_chunk, struct config_item_type, interface_type, 1);
 
@@ -1165,18 +1158,14 @@ int usb_os_desc_prepare_interf_dir(struct config_group *parent,
        if (!vlabuf)
                return -ENOMEM;
 
-       f_default_groups = vla_ptr(vlabuf, data_chunk, f_default_groups);
        os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group);
        os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type);
-       interface_groups = vla_ptr(vlabuf, data_chunk, interface_groups);
        interface_type = vla_ptr(vlabuf, data_chunk, interface_type);
 
-       parent->default_groups = f_default_groups;
        os_desc_type->ct_owner = owner;
        config_group_init_type_name(os_desc_group, "os_desc", os_desc_type);
-       f_default_groups[0] = os_desc_group;
+       configfs_add_default_group(os_desc_group, parent);
 
-       os_desc_group->default_groups = interface_groups;
        interface_type->ct_group_ops = &interf_grp_ops;
        interface_type->ct_attrs = interf_grp_attrs;
        interface_type->ct_owner = owner;
@@ -1189,7 +1178,7 @@ int usb_os_desc_prepare_interf_dir(struct config_group *parent,
                config_group_init_type_name(&d->group, "", interface_type);
                config_item_set_name(&d->group.cg_item, "interface.%s",
                                     names[n_interf]);
-               interface_groups[n_interf] = &d->group;
+               configfs_add_default_group(&d->group, os_desc_group);
        }
 
        return 0;
@@ -1423,20 +1412,23 @@ static struct config_group *gadgets_make(
        if (!gi)
                return ERR_PTR(-ENOMEM);
 
-       gi->group.default_groups = gi->default_groups;
-       gi->group.default_groups[0] = &gi->functions_group;
-       gi->group.default_groups[1] = &gi->configs_group;
-       gi->group.default_groups[2] = &gi->strings_group;
-       gi->group.default_groups[3] = &gi->os_desc_group;
+       config_group_init_type_name(&gi->group, name, &gadget_root_type);
 
        config_group_init_type_name(&gi->functions_group, "functions",
                        &functions_type);
+       configfs_add_default_group(&gi->functions_group, &gi->group);
+
        config_group_init_type_name(&gi->configs_group, "configs",
                        &config_desc_type);
+       configfs_add_default_group(&gi->configs_group, &gi->group);
+
        config_group_init_type_name(&gi->strings_group, "strings",
                        &gadget_strings_strings_type);
+       configfs_add_default_group(&gi->strings_group, &gi->group);
+
        config_group_init_type_name(&gi->os_desc_group, "os_desc",
                        &os_desc_type);
+       configfs_add_default_group(&gi->os_desc_group, &gi->group);
 
        gi->composite.bind = configfs_do_nothing;
        gi->composite.unbind = configfs_do_nothing;
@@ -1461,8 +1453,6 @@ static struct config_group *gadgets_make(
        if (!gi->composite.gadget_driver.function)
                goto err;
 
-       config_group_init_type_name(&gi->group, name,
-                               &gadget_root_type);
        return &gi->group;
 err:
        kfree(gi);
index 223ccf89d2263fb6483a1a22116a3743c9d7ed8e..142bb7763f2aa91faf3f27f552d24a44f31e0ef1 100644 (file)
@@ -3484,12 +3484,12 @@ static struct usb_function_instance *fsg_alloc_inst(void)
 
        opts->lun0.lun = opts->common->luns[0];
        opts->lun0.lun_id = 0;
-       config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type);
-       opts->default_groups[0] = &opts->lun0.group;
-       opts->func_inst.group.default_groups = opts->default_groups;
 
        config_group_init_type_name(&opts->func_inst.group, "", &fsg_func_type);
 
+       config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type);
+       configfs_add_default_group(&opts->lun0.group, &opts->func_inst.group);
+
        return &opts->func_inst;
 
 release_buffers:
index e587767e374cbc2fbae3b02879b5358c38d48e69..f577eec88f8ca497459f00da913892e7f0ce8549 100644 (file)
@@ -889,7 +889,6 @@ static void rndis_free_inst(struct usb_function_instance *f)
                        free_netdev(opts->net);
        }
 
-       kfree(opts->rndis_os_desc.group.default_groups); /* single VLA chunk */
        kfree(opts);
 }
 
@@ -916,10 +915,10 @@ static struct usb_function_instance *rndis_alloc_inst(void)
 
        descs[0] = &opts->rndis_os_desc;
        names[0] = "rndis";
-       usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
-                                      names, THIS_MODULE);
        config_group_init_type_name(&opts->func_inst.group, "",
                                    &rndis_func_type);
+       usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
+                                      names, THIS_MODULE);
 
        return &opts->func_inst;
 }
index ad8c9b05572d7421885ff161d32543f8942eb90d..66753ba7a42eb803e64964c6a4a470dad6391242 100644 (file)
@@ -272,11 +272,6 @@ static struct config_item_type uvcg_default_processing_type = {
 
 /* struct uvcg_processing {}; */
 
-static struct config_group *uvcg_processing_default_groups[] = {
-       &uvcg_default_processing.group,
-       NULL,
-};
-
 /* control/processing */
 static struct uvcg_processing_grp {
        struct config_group     group;
@@ -394,11 +389,6 @@ static struct config_item_type uvcg_default_camera_type = {
 
 /* struct uvcg_camera {}; */
 
-static struct config_group *uvcg_camera_default_groups[] = {
-       &uvcg_default_camera.group,
-       NULL,
-};
-
 /* control/terminal/camera */
 static struct uvcg_camera_grp {
        struct config_group     group;
@@ -477,11 +467,6 @@ static struct config_item_type uvcg_default_output_type = {
 
 /* struct uvcg_output {}; */
 
-static struct config_group *uvcg_output_default_groups[] = {
-       &uvcg_default_output.group,
-       NULL,
-};
-
 /* control/terminal/output */
 static struct uvcg_output_grp {
        struct config_group     group;
@@ -491,12 +476,6 @@ static struct config_item_type uvcg_output_grp_type = {
        .ct_owner = THIS_MODULE,
 };
 
-static struct config_group *uvcg_terminal_default_groups[] = {
-       &uvcg_camera_grp.group,
-       &uvcg_output_grp.group,
-       NULL,
-};
-
 /* control/terminal */
 static struct uvcg_terminal_grp {
        struct config_group     group;
@@ -619,12 +598,6 @@ static struct config_item_type uvcg_control_class_type = {
        .ct_owner       = THIS_MODULE,
 };
 
-static struct config_group *uvcg_control_class_default_groups[] = {
-       &uvcg_control_class_fs.group,
-       &uvcg_control_class_ss.group,
-       NULL,
-};
-
 /* control/class */
 static struct uvcg_control_class_grp {
        struct config_group     group;
@@ -634,14 +607,6 @@ static struct config_item_type uvcg_control_class_grp_type = {
        .ct_owner = THIS_MODULE,
 };
 
-static struct config_group *uvcg_control_default_groups[] = {
-       &uvcg_control_header_grp.group,
-       &uvcg_processing_grp.group,
-       &uvcg_terminal_grp.group,
-       &uvcg_control_class_grp.group,
-       NULL,
-};
-
 /* control */
 static struct uvcg_control_grp {
        struct config_group     group;
@@ -1780,11 +1745,6 @@ static struct config_item_type uvcg_default_color_matching_type = {
 
 /* struct uvcg_color_matching {}; */
 
-static struct config_group *uvcg_color_matching_default_groups[] = {
-       &uvcg_default_color_matching.group,
-       NULL,
-};
-
 /* streaming/color_matching */
 static struct uvcg_color_matching_grp {
        struct config_group     group;
@@ -2145,13 +2105,6 @@ static struct config_item_type uvcg_streaming_class_type = {
        .ct_owner       = THIS_MODULE,
 };
 
-static struct config_group *uvcg_streaming_class_default_groups[] = {
-       &uvcg_streaming_class_fs.group,
-       &uvcg_streaming_class_hs.group,
-       &uvcg_streaming_class_ss.group,
-       NULL,
-};
-
 /* streaming/class */
 static struct uvcg_streaming_class_grp {
        struct config_group     group;
@@ -2161,15 +2114,6 @@ static struct config_item_type uvcg_streaming_class_grp_type = {
        .ct_owner = THIS_MODULE,
 };
 
-static struct config_group *uvcg_streaming_default_groups[] = {
-       &uvcg_streaming_header_grp.group,
-       &uvcg_uncompressed_grp.group,
-       &uvcg_mjpeg_grp.group,
-       &uvcg_color_matching_grp.group,
-       &uvcg_streaming_class_grp.group,
-       NULL,
-};
-
 /* streaming */
 static struct uvcg_streaming_grp {
        struct config_group     group;
@@ -2179,12 +2123,6 @@ static struct config_item_type uvcg_streaming_grp_type = {
        .ct_owner = THIS_MODULE,
 };
 
-static struct config_group *uvcg_default_groups[] = {
-       &uvcg_control_grp.group,
-       &uvcg_streaming_grp.group,
-       NULL,
-};
-
 static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
 {
        return container_of(to_config_group(item), struct f_uvc_opts,
@@ -2273,59 +2211,64 @@ static struct config_item_type uvc_func_type = {
        .ct_owner       = THIS_MODULE,
 };
 
-static inline void uvcg_init_group(struct config_group *g,
-                                  struct config_group **default_groups,
-                                  const char *name,
-                                  struct config_item_type *type)
-{
-       g->default_groups = default_groups;
-       config_group_init_type_name(g, name, type);
-}
-
 int uvcg_attach_configfs(struct f_uvc_opts *opts)
 {
        config_group_init_type_name(&uvcg_control_header_grp.group,
                                    "header",
                                    &uvcg_control_header_grp_type);
+
        config_group_init_type_name(&uvcg_default_processing.group,
-                                   "default",
-                                   &uvcg_default_processing_type);
-       uvcg_init_group(&uvcg_processing_grp.group,
-                       uvcg_processing_default_groups,
-                       "processing",
-                       &uvcg_processing_grp_type);
+                       "default", &uvcg_default_processing_type);
+       config_group_init_type_name(&uvcg_processing_grp.group,
+                       "processing", &uvcg_processing_grp_type);
+       configfs_add_default_group(&uvcg_default_processing.group,
+                       &uvcg_processing_grp.group);
+
        config_group_init_type_name(&uvcg_default_camera.group,
-                                   "default",
-                                   &uvcg_default_camera_type);
-       uvcg_init_group(&uvcg_camera_grp.group,
-                       uvcg_camera_default_groups,
-                       "camera",
-                       &uvcg_camera_grp_type);
+                       "default", &uvcg_default_camera_type);
+       config_group_init_type_name(&uvcg_camera_grp.group,
+                       "camera", &uvcg_camera_grp_type);
+       configfs_add_default_group(&uvcg_default_camera.group,
+                       &uvcg_camera_grp.group);
+
        config_group_init_type_name(&uvcg_default_output.group,
-                                   "default",
-                                   &uvcg_default_output_type);
-       uvcg_init_group(&uvcg_output_grp.group,
-                       uvcg_output_default_groups,
-                       "output",
-                       &uvcg_output_grp_type);
-       uvcg_init_group(&uvcg_terminal_grp.group,
-                       uvcg_terminal_default_groups,
-                       "terminal",
-                       &uvcg_terminal_grp_type);
+                       "default", &uvcg_default_output_type);
+       config_group_init_type_name(&uvcg_output_grp.group,
+                       "output", &uvcg_output_grp_type);
+       configfs_add_default_group(&uvcg_default_output.group,
+                       &uvcg_output_grp.group);
+
+       config_group_init_type_name(&uvcg_terminal_grp.group,
+                       "terminal", &uvcg_terminal_grp_type);
+       configfs_add_default_group(&uvcg_camera_grp.group,
+                       &uvcg_terminal_grp.group);
+       configfs_add_default_group(&uvcg_output_grp.group,
+                       &uvcg_terminal_grp.group);
+
        config_group_init_type_name(&uvcg_control_class_fs.group,
-                                   "fs",
-                                   &uvcg_control_class_type);
+                       "fs", &uvcg_control_class_type);
        config_group_init_type_name(&uvcg_control_class_ss.group,
-                                   "ss",
-                                   &uvcg_control_class_type);
-       uvcg_init_group(&uvcg_control_class_grp.group,
-                       uvcg_control_class_default_groups,
+                       "ss", &uvcg_control_class_type);
+       config_group_init_type_name(&uvcg_control_class_grp.group,
                        "class",
                        &uvcg_control_class_grp_type);
-       uvcg_init_group(&uvcg_control_grp.group,
-                       uvcg_control_default_groups,
+       configfs_add_default_group(&uvcg_control_class_fs.group,
+                       &uvcg_control_class_grp.group);
+       configfs_add_default_group(&uvcg_control_class_ss.group,
+                       &uvcg_control_class_grp.group);
+
+       config_group_init_type_name(&uvcg_control_grp.group,
                        "control",
                        &uvcg_control_grp_type);
+       configfs_add_default_group(&uvcg_control_header_grp.group,
+                       &uvcg_control_grp.group);
+       configfs_add_default_group(&uvcg_processing_grp.group,
+                       &uvcg_control_grp.group);
+       configfs_add_default_group(&uvcg_terminal_grp.group,
+                       &uvcg_control_grp.group);
+       configfs_add_default_group(&uvcg_control_class_grp.group,
+                       &uvcg_control_grp.group);
+
        config_group_init_type_name(&uvcg_streaming_header_grp.group,
                                    "header",
                                    &uvcg_streaming_header_grp_type);
@@ -2338,30 +2281,47 @@ int uvcg_attach_configfs(struct f_uvc_opts *opts)
        config_group_init_type_name(&uvcg_default_color_matching.group,
                                    "default",
                                    &uvcg_default_color_matching_type);
-       uvcg_init_group(&uvcg_color_matching_grp.group,
-                       uvcg_color_matching_default_groups,
+       config_group_init_type_name(&uvcg_color_matching_grp.group,
                        "color_matching",
                        &uvcg_color_matching_grp_type);
+       configfs_add_default_group(&uvcg_default_color_matching.group,
+                       &uvcg_color_matching_grp.group);
+
        config_group_init_type_name(&uvcg_streaming_class_fs.group,
-                                   "fs",
-                                   &uvcg_streaming_class_type);
+                       "fs", &uvcg_streaming_class_type);
        config_group_init_type_name(&uvcg_streaming_class_hs.group,
-                                   "hs",
-                                   &uvcg_streaming_class_type);
+                       "hs", &uvcg_streaming_class_type);
        config_group_init_type_name(&uvcg_streaming_class_ss.group,
-                                   "ss",
-                                   &uvcg_streaming_class_type);
-       uvcg_init_group(&uvcg_streaming_class_grp.group,
-                       uvcg_streaming_class_default_groups,
-                       "class",
-                       &uvcg_streaming_class_grp_type);
-       uvcg_init_group(&uvcg_streaming_grp.group,
-                       uvcg_streaming_default_groups,
-                       "streaming",
-                       &uvcg_streaming_grp_type);
-       uvcg_init_group(&opts->func_inst.group,
-                       uvcg_default_groups,
+                       "ss", &uvcg_streaming_class_type);
+       config_group_init_type_name(&uvcg_streaming_class_grp.group,
+                       "class", &uvcg_streaming_class_grp_type);
+       configfs_add_default_group(&uvcg_streaming_class_fs.group,
+                       &uvcg_streaming_class_grp.group);
+       configfs_add_default_group(&uvcg_streaming_class_hs.group,
+                       &uvcg_streaming_class_grp.group);
+       configfs_add_default_group(&uvcg_streaming_class_ss.group,
+                       &uvcg_streaming_class_grp.group);
+
+       config_group_init_type_name(&uvcg_streaming_grp.group,
+                       "streaming", &uvcg_streaming_grp_type);
+       configfs_add_default_group(&uvcg_streaming_header_grp.group,
+                       &uvcg_streaming_grp.group);
+       configfs_add_default_group(&uvcg_uncompressed_grp.group,
+                       &uvcg_streaming_grp.group);
+       configfs_add_default_group(&uvcg_mjpeg_grp.group,
+                       &uvcg_streaming_grp.group);
+       configfs_add_default_group(&uvcg_color_matching_grp.group,
+                       &uvcg_streaming_grp.group);
+       configfs_add_default_group(&uvcg_streaming_class_grp.group,
+                       &uvcg_streaming_grp.group);
+
+       config_group_init_type_name(&opts->func_inst.group,
                        "",
                        &uvc_func_type);
+       configfs_add_default_group(&uvcg_control_grp.group,
+                       &opts->func_inst.group);
+       configfs_add_default_group(&uvcg_streaming_grp.group,
+                       &opts->func_inst.group);
+
        return 0;
 }
index f419519ec41fb4f3e932fe18561b34f3313e747b..b51ce6778145bb110e813b6396304cf5d2d248b4 100644 (file)
@@ -701,23 +701,29 @@ static int populate_groups(struct config_group *group)
 {
        struct config_group *new_group;
        int ret = 0;
-       int i;
-
-       if (group->default_groups) {
-               for (i = 0; group->default_groups[i]; i++) {
-                       new_group = group->default_groups[i];
 
-                       ret = create_default_group(group, new_group);
-                       if (ret) {
-                               detach_groups(group);
-                               break;
-                       }
+       list_for_each_entry(new_group, &group->default_groups, group_entry) {
+               ret = create_default_group(group, new_group);
+               if (ret) {
+                       detach_groups(group);
+                       break;
                }
        }
 
        return ret;
 }
 
+void configfs_remove_default_groups(struct config_group *group)
+{
+       struct config_group *g, *n;
+
+       list_for_each_entry_safe(g, n, &group->default_groups, group_entry) {
+               list_del(&g->group_entry);
+               config_item_put(&g->cg_item);
+       }
+}
+EXPORT_SYMBOL(configfs_remove_default_groups);
+
 /*
  * All of link_obj/unlink_obj/link_group/unlink_group require that
  * subsys->su_mutex is held.
@@ -766,15 +772,10 @@ static void link_obj(struct config_item *parent_item, struct config_item *item)
 
 static void unlink_group(struct config_group *group)
 {
-       int i;
        struct config_group *new_group;
 
-       if (group->default_groups) {
-               for (i = 0; group->default_groups[i]; i++) {
-                       new_group = group->default_groups[i];
-                       unlink_group(new_group);
-               }
-       }
+       list_for_each_entry(new_group, &group->default_groups, group_entry)
+               unlink_group(new_group);
 
        group->cg_subsys = NULL;
        unlink_obj(&group->cg_item);
@@ -782,7 +783,6 @@ static void unlink_group(struct config_group *group)
 
 static void link_group(struct config_group *parent_group, struct config_group *group)
 {
-       int i;
        struct config_group *new_group;
        struct configfs_subsystem *subsys = NULL; /* gcc is a turd */
 
@@ -796,12 +796,8 @@ static void link_group(struct config_group *parent_group, struct config_group *g
                BUG();
        group->cg_subsys = subsys;
 
-       if (group->default_groups) {
-               for (i = 0; group->default_groups[i]; i++) {
-                       new_group = group->default_groups[i];
-                       link_group(group, new_group);
-               }
-       }
+       list_for_each_entry(new_group, &group->default_groups, group_entry)
+               link_group(group, new_group);
 }
 
 /*
index b863a09cd2f1e9b35d53bbf284e3eb3c3cbeb226..8b2a994042ddeb2d1b8c00bbee3436e79fff52ad 100644 (file)
@@ -182,6 +182,7 @@ void config_group_init(struct config_group *group)
 {
        config_item_init(&group->cg_item);
        INIT_LIST_HEAD(&group->cg_children);
+       INIT_LIST_HEAD(&group->default_groups);
 }
 EXPORT_SYMBOL(config_group_init);
 
index 8e294fbbac392c9bacdc6ee886be7ba3e80cd070..519112168a9e203f048f821357a3de784f682b8d 100644 (file)
@@ -346,7 +346,6 @@ static struct config_group *make_cluster(struct config_group *g,
        void *gps = NULL;
 
        cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
-       gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS);
        sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
        cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
 
@@ -357,10 +356,8 @@ static struct config_group *make_cluster(struct config_group *g,
        config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
        config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
 
-       cl->group.default_groups = gps;
-       cl->group.default_groups[0] = &sps->ss_group;
-       cl->group.default_groups[1] = &cms->cs_group;
-       cl->group.default_groups[2] = NULL;
+       configfs_add_default_group(&sps->ss_group, &cl->group);
+       configfs_add_default_group(&cms->cs_group, &cl->group);
 
        cl->cl_tcp_port = dlm_config.ci_tcp_port;
        cl->cl_buffer_size = dlm_config.ci_buffer_size;
@@ -383,7 +380,6 @@ static struct config_group *make_cluster(struct config_group *g,
 
  fail:
        kfree(cl);
-       kfree(gps);
        kfree(sps);
        kfree(cms);
        return ERR_PTR(-ENOMEM);
@@ -392,14 +388,8 @@ static struct config_group *make_cluster(struct config_group *g,
 static void drop_cluster(struct config_group *g, struct config_item *i)
 {
        struct dlm_cluster *cl = config_item_to_cluster(i);
-       struct config_item *tmp;
-       int j;
 
-       for (j = 0; cl->group.default_groups[j]; j++) {
-               tmp = &cl->group.default_groups[j]->cg_item;
-               cl->group.default_groups[j] = NULL;
-               config_item_put(tmp);
-       }
+       configfs_remove_default_groups(&cl->group);
 
        space_list = NULL;
        comm_list = NULL;
@@ -410,7 +400,6 @@ static void drop_cluster(struct config_group *g, struct config_item *i)
 static void release_cluster(struct config_item *i)
 {
        struct dlm_cluster *cl = config_item_to_cluster(i);
-       kfree(cl->group.default_groups);
        kfree(cl);
 }
 
@@ -418,21 +407,17 @@ static struct config_group *make_space(struct config_group *g, const char *name)
 {
        struct dlm_space *sp = NULL;
        struct dlm_nodes *nds = NULL;
-       void *gps = NULL;
 
        sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
-       gps = kcalloc(2, sizeof(struct config_group *), GFP_NOFS);
        nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
 
-       if (!sp || !gps || !nds)
+       if (!sp || !nds)
                goto fail;
 
        config_group_init_type_name(&sp->group, name, &space_type);
-       config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
 
-       sp->group.default_groups = gps;
-       sp->group.default_groups[0] = &nds->ns_group;
-       sp->group.default_groups[1] = NULL;
+       config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
+       configfs_add_default_group(&nds->ns_group, &sp->group);
 
        INIT_LIST_HEAD(&sp->members);
        mutex_init(&sp->members_lock);
@@ -441,7 +426,6 @@ static struct config_group *make_space(struct config_group *g, const char *name)
 
  fail:
        kfree(sp);
-       kfree(gps);
        kfree(nds);
        return ERR_PTR(-ENOMEM);
 }
@@ -449,24 +433,16 @@ static struct config_group *make_space(struct config_group *g, const char *name)
 static void drop_space(struct config_group *g, struct config_item *i)
 {
        struct dlm_space *sp = config_item_to_space(i);
-       struct config_item *tmp;
-       int j;
 
        /* assert list_empty(&sp->members) */
 
-       for (j = 0; sp->group.default_groups[j]; j++) {
-               tmp = &sp->group.default_groups[j]->cg_item;
-               sp->group.default_groups[j] = NULL;
-               config_item_put(tmp);
-       }
-
+       configfs_remove_default_groups(&sp->group);
        config_item_put(i);
 }
 
 static void release_space(struct config_item *i)
 {
        struct dlm_space *sp = config_item_to_space(i);
-       kfree(sp->group.default_groups);
        kfree(sp);
 }
 
index ebe543894db09653ecac587409af66e288bad75a..b17d180bdc163544f05b341d98fe79e95ad5c582 100644 (file)
@@ -630,7 +630,6 @@ static void o2nm_cluster_release(struct config_item *item)
 {
        struct o2nm_cluster *cluster = to_o2nm_cluster(item);
 
-       kfree(cluster->cl_group.default_groups);
        kfree(cluster);
 }
 
@@ -666,7 +665,6 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
        struct o2nm_cluster *cluster = NULL;
        struct o2nm_node_group *ns = NULL;
        struct config_group *o2hb_group = NULL, *ret = NULL;
-       void *defs = NULL;
 
        /* this runs under the parent dir's i_mutex; there can be only
         * one caller in here at a time */
@@ -675,20 +673,18 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
 
        cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL);
        ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL);
-       defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
        o2hb_group = o2hb_alloc_hb_set();
-       if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL)
+       if (cluster == NULL || ns == NULL || o2hb_group == NULL)
                goto out;
 
        config_group_init_type_name(&cluster->cl_group, name,
                                    &o2nm_cluster_type);
+       configfs_add_default_group(&ns->ns_group, &cluster->cl_group);
+
        config_group_init_type_name(&ns->ns_group, "node",
                                    &o2nm_node_group_type);
+       configfs_add_default_group(o2hb_group, &cluster->cl_group);
 
-       cluster->cl_group.default_groups = defs;
-       cluster->cl_group.default_groups[0] = &ns->ns_group;
-       cluster->cl_group.default_groups[1] = o2hb_group;
-       cluster->cl_group.default_groups[2] = NULL;
        rwlock_init(&cluster->cl_nodes_lock);
        cluster->cl_node_ip_tree = RB_ROOT;
        cluster->cl_reconnect_delay_ms = O2NET_RECONNECT_DELAY_MS_DEFAULT;
@@ -704,7 +700,6 @@ out:
                kfree(cluster);
                kfree(ns);
                o2hb_free_hb_set(o2hb_group);
-               kfree(defs);
                ret = ERR_PTR(-ENOMEM);
        }
 
@@ -714,18 +709,11 @@ out:
 static void o2nm_cluster_group_drop_item(struct config_group *group, struct config_item *item)
 {
        struct o2nm_cluster *cluster = to_o2nm_cluster(item);
-       int i;
-       struct config_item *killme;
 
        BUG_ON(o2nm_single_cluster != cluster);
        o2nm_single_cluster = NULL;
 
-       for (i = 0; cluster->cl_group.default_groups[i]; i++) {
-               killme = &cluster->cl_group.default_groups[i]->cg_item;
-               cluster->cl_group.default_groups[i] = NULL;
-               config_item_put(killme);
-       }
-
+       configfs_remove_default_groups(&cluster->cl_group);
        config_item_put(item);
 }
 
index f8165c129ccb260498b44e7451153a9281a0a79a..485fe5519448ba451a247d944ca2df0f8811e4f7 100644 (file)
@@ -96,7 +96,8 @@ struct config_group {
        struct config_item              cg_item;
        struct list_head                cg_children;
        struct configfs_subsystem       *cg_subsys;
-       struct config_group             **default_groups;
+       struct list_head                default_groups;
+       struct list_head                group_entry;
 };
 
 extern void config_group_init(struct config_group *group);
@@ -123,6 +124,12 @@ extern struct config_item *config_group_find_item(struct config_group *,
                                                  const char *);
 
 
+static inline void configfs_add_default_group(struct config_group *new_group,
+               struct config_group *group)
+{
+       list_add_tail(&new_group->group_entry, &group->default_groups);
+}
+
 struct configfs_attribute {
        const char              *ca_name;
        struct module           *ca_owner;
@@ -251,6 +258,8 @@ int configfs_register_group(struct config_group *parent_group,
                            struct config_group *group);
 void configfs_unregister_group(struct config_group *group);
 
+void configfs_remove_default_groups(struct config_group *group);
+
 struct config_group *
 configfs_register_default_group(struct config_group *parent_group,
                                const char *name,
index e8c8c08bf575f4de6436d8c090b15f77b6717f2a..1b09cac065085cbae02f718bd63edd7d266048bc 100644 (file)
@@ -560,7 +560,6 @@ struct se_node_acl {
        struct config_group     acl_auth_group;
        struct config_group     acl_param_group;
        struct config_group     acl_fabric_stat_group;
-       struct config_group     *acl_default_groups[5];
        struct list_head        acl_list;
        struct list_head        acl_sess_list;
        struct completion       acl_free_comp;
@@ -887,7 +886,6 @@ struct se_portal_group {
        const struct target_core_fabric_ops *se_tpg_tfo;
        struct se_wwn           *se_tpg_wwn;
        struct config_group     tpg_group;
-       struct config_group     *tpg_default_groups[7];
        struct config_group     tpg_lun_group;
        struct config_group     tpg_np_group;
        struct config_group     tpg_acl_group;
@@ -923,7 +921,6 @@ static inline struct se_portal_group *param_to_tpg(struct config_item *item)
 struct se_wwn {
        struct target_fabric_configfs *wwn_tf;
        struct config_group     wwn_group;
-       struct config_group     *wwn_default_groups[2];
        struct config_group     fabric_stat_group;
 };