diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/configfs/item.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/configfs/item.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/ANDROID_3.4.5/fs/configfs/item.c b/ANDROID_3.4.5/fs/configfs/item.c deleted file mode 100644 index 50cee7f9..00000000 --- a/ANDROID_3.4.5/fs/configfs/item.c +++ /dev/null @@ -1,216 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * item.c - library routines for handling generic config items - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - * - * Based on kobject: - * kobject is Copyright (c) 2002-2003 Patrick Mochel - * - * configfs Copyright (C) 2005 Oracle. All rights reserved. - * - * Please see the file Documentation/filesystems/configfs/configfs.txt for - * critical information about using the config_item interface. - */ - -#include <linux/string.h> -#include <linux/module.h> -#include <linux/stat.h> -#include <linux/slab.h> - -#include <linux/configfs.h> - - -static inline struct config_item * to_item(struct list_head * entry) -{ - return container_of(entry,struct config_item,ci_entry); -} - -/* Evil kernel */ -static void config_item_release(struct kref *kref); - -/** - * config_item_init - initialize item. - * @item: item in question. - */ -void config_item_init(struct config_item * item) -{ - kref_init(&item->ci_kref); - INIT_LIST_HEAD(&item->ci_entry); -} - -/** - * config_item_set_name - Set the name of an item - * @item: item. - * @name: name. - * - * If strlen(name) >= CONFIGFS_ITEM_NAME_LEN, then use a - * dynamically allocated string that @item->ci_name points to. - * Otherwise, use the static @item->ci_namebuf array. - */ -int config_item_set_name(struct config_item * item, const char * fmt, ...) -{ - int error = 0; - int limit = CONFIGFS_ITEM_NAME_LEN; - int need; - va_list args; - char * name; - - /* - * First, try the static array - */ - va_start(args,fmt); - need = vsnprintf(item->ci_namebuf,limit,fmt,args); - va_end(args); - if (need < limit) - name = item->ci_namebuf; - else { - /* - * Need more space? Allocate it and try again - */ - limit = need + 1; - name = kmalloc(limit,GFP_KERNEL); - if (!name) { - error = -ENOMEM; - goto Done; - } - va_start(args,fmt); - need = vsnprintf(name,limit,fmt,args); - va_end(args); - - /* Still? Give up. */ - if (need >= limit) { - kfree(name); - error = -EFAULT; - goto Done; - } - } - - /* Free the old name, if necessary. */ - if (item->ci_name && item->ci_name != item->ci_namebuf) - kfree(item->ci_name); - - /* Now, set the new name */ - item->ci_name = name; - Done: - return error; -} - -EXPORT_SYMBOL(config_item_set_name); - -void config_item_init_type_name(struct config_item *item, - const char *name, - struct config_item_type *type) -{ - config_item_set_name(item, name); - item->ci_type = type; - config_item_init(item); -} -EXPORT_SYMBOL(config_item_init_type_name); - -void config_group_init_type_name(struct config_group *group, const char *name, - struct config_item_type *type) -{ - config_item_set_name(&group->cg_item, name); - group->cg_item.ci_type = type; - config_group_init(group); -} -EXPORT_SYMBOL(config_group_init_type_name); - -struct config_item * config_item_get(struct config_item * item) -{ - if (item) - kref_get(&item->ci_kref); - return item; -} - -static void config_item_cleanup(struct config_item * item) -{ - struct config_item_type * t = item->ci_type; - struct config_group * s = item->ci_group; - struct config_item * parent = item->ci_parent; - - pr_debug("config_item %s: cleaning up\n",config_item_name(item)); - if (item->ci_name != item->ci_namebuf) - kfree(item->ci_name); - item->ci_name = NULL; - if (t && t->ct_item_ops && t->ct_item_ops->release) - t->ct_item_ops->release(item); - if (s) - config_group_put(s); - if (parent) - config_item_put(parent); -} - -static void config_item_release(struct kref *kref) -{ - config_item_cleanup(container_of(kref, struct config_item, ci_kref)); -} - -/** - * config_item_put - decrement refcount for item. - * @item: item. - * - * Decrement the refcount, and if 0, call config_item_cleanup(). - */ -void config_item_put(struct config_item * item) -{ - if (item) - kref_put(&item->ci_kref, config_item_release); -} - -/** - * config_group_init - initialize a group for use - * @k: group - */ -void config_group_init(struct config_group *group) -{ - config_item_init(&group->cg_item); - INIT_LIST_HEAD(&group->cg_children); -} - -/** - * config_group_find_item - search for item in group. - * @group: group we're looking in. - * @name: item's name. - * - * Iterate over @group->cg_list, looking for a matching config_item. - * If matching item is found take a reference and return the item. - * Caller must have locked group via @group->cg_subsys->su_mtx. - */ -struct config_item *config_group_find_item(struct config_group *group, - const char *name) -{ - struct list_head * entry; - struct config_item * ret = NULL; - - list_for_each(entry,&group->cg_children) { - struct config_item * item = to_item(entry); - if (config_item_name(item) && - !strcmp(config_item_name(item), name)) { - ret = config_item_get(item); - break; - } - } - return ret; -} - -EXPORT_SYMBOL(config_item_init); -EXPORT_SYMBOL(config_group_init); -EXPORT_SYMBOL(config_item_get); -EXPORT_SYMBOL(config_item_put); -EXPORT_SYMBOL(config_group_find_item); |