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lib/kobject.c
26.1 KB
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/* * kobject.c - library routines for handling generic kernel objects * * Copyright (c) 2002-2003 Patrick Mochel <mochel@osdl.org> |
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* Copyright (c) 2006-2007 Greg Kroah-Hartman <greg@kroah.com> * Copyright (c) 2006-2007 Novell Inc. |
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* * This file is released under the GPLv2. * * * Please see the file Documentation/kobject.txt for critical information * about using the kobject interface. */ #include <linux/kobject.h> #include <linux/string.h> |
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#include <linux/export.h> |
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#include <linux/stat.h> |
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#include <linux/slab.h> |
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#include <linux/random.h> |
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/** * kobject_namespace - return @kobj's namespace tag * @kobj: kobject in question * * Returns namespace tag of @kobj if its parent has namespace ops enabled * and thus @kobj should have a namespace tag associated with it. Returns * %NULL otherwise. */ const void *kobject_namespace(struct kobject *kobj) { const struct kobj_ns_type_operations *ns_ops = kobj_ns_ops(kobj); if (!ns_ops || ns_ops->type == KOBJ_NS_TYPE_NONE) return NULL; |
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return kobj->ktype->namespace(kobj); |
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} |
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/* * populate_dir - populate directory with attributes. * @kobj: object we're working on. |
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* |
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* Most subsystems have a set of default attributes that are associated * with an object that registers with them. This is a helper called during * object registration that loops through the default attributes of the * subsystem and creates attributes files for them in sysfs. |
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*/ |
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static int populate_dir(struct kobject *kobj) |
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{ |
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struct kobj_type *t = get_ktype(kobj); struct attribute *attr; |
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int error = 0; int i; |
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|
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if (t && t->default_attrs) { for (i = 0; (attr = t->default_attrs[i]) != NULL; i++) { |
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error = sysfs_create_file(kobj, attr); if (error) |
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break; } } return error; } |
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static int create_dir(struct kobject *kobj) |
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{ |
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const struct kobj_ns_type_operations *ops; |
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int error; error = sysfs_create_dir_ns(kobj, kobject_namespace(kobj)); |
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if (error) return error; error = populate_dir(kobj); if (error) { sysfs_remove_dir(kobj); return error; |
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} |
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/* * @kobj->sd may be deleted by an ancestor going away. Hold an * extra reference so that it stays until @kobj is gone. */ sysfs_get(kobj->sd); |
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/* * If @kobj has ns_ops, its children need to be filtered based on * their namespace tags. Enable namespace support on @kobj->sd. */ ops = kobj_child_ns_ops(kobj); if (ops) { BUG_ON(ops->type <= KOBJ_NS_TYPE_NONE); BUG_ON(ops->type >= KOBJ_NS_TYPES); BUG_ON(!kobj_ns_type_registered(ops->type)); |
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sysfs_enable_ns(kobj->sd); |
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} return 0; |
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} |
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static int get_kobj_path_length(struct kobject *kobj) { int length = 1; |
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struct kobject *parent = kobj; |
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|
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/* walk up the ancestors until we hit the one pointing to the |
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* root. * Add 1 to strlen for leading '/' of each level. */ do { |
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if (kobject_name(parent) == NULL) return 0; |
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length += strlen(kobject_name(parent)) + 1; parent = parent->parent; } while (parent); return length; } static void fill_kobj_path(struct kobject *kobj, char *path, int length) { |
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struct kobject *parent; |
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--length; for (parent = kobj; parent; parent = parent->parent) { int cur = strlen(kobject_name(parent)); /* back up enough to print this name with '/' */ length -= cur; |
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memcpy(path + length, kobject_name(parent), cur); |
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*(path + --length) = '/'; } |
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pr_debug("kobject: '%s' (%p): %s: path = '%s' ", kobject_name(kobj), |
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kobj, __func__, path); |
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} /** |
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* kobject_get_path - generate and return the path associated with a given kobj and kset pair. |
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* * @kobj: kobject in question, with which to build the path * @gfp_mask: the allocation type used to allocate the path |
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* * The result must be freed by the caller with kfree(). |
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*/ |
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char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask) |
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{ char *path; int len; len = get_kobj_path_length(kobj); |
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if (len == 0) return NULL; |
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path = kzalloc(len, gfp_mask); |
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if (!path) return NULL; |
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fill_kobj_path(kobj, path, len); return path; } |
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EXPORT_SYMBOL_GPL(kobject_get_path); |
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|
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/* add the kobject to its kset's list */ static void kobj_kset_join(struct kobject *kobj) |
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{ |
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if (!kobj->kset) |
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return; |
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kset_get(kobj->kset); spin_lock(&kobj->kset->list_lock); list_add_tail(&kobj->entry, &kobj->kset->list); spin_unlock(&kobj->kset->list_lock); |
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} |
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/* remove the kobject from its kset's list */ static void kobj_kset_leave(struct kobject *kobj) { if (!kobj->kset) return; |
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spin_lock(&kobj->kset->list_lock); list_del_init(&kobj->entry); spin_unlock(&kobj->kset->list_lock); kset_put(kobj->kset); } |
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|
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static void kobject_init_internal(struct kobject *kobj) |
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{ |
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if (!kobj) return; kref_init(&kobj->kref); INIT_LIST_HEAD(&kobj->entry); |
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kobj->state_in_sysfs = 0; kobj->state_add_uevent_sent = 0; kobj->state_remove_uevent_sent = 0; kobj->state_initialized = 1; |
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} |
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static int kobject_add_internal(struct kobject *kobj) |
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{ int error = 0; |
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struct kobject *parent; |
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|
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if (!kobj) |
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return -ENOENT; |
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|
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if (!kobj->name || !kobj->name[0]) { |
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WARN(1, "kobject: (%p): attempted to be registered with empty " |
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"name! ", kobj); |
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return -EINVAL; } |
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|
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parent = kobject_get(kobj->parent); |
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/* join kset if set, use it as parent if we do not already have one */ |
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if (kobj->kset) { |
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if (!parent) |
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parent = kobject_get(&kobj->kset->kobj); |
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kobj_kset_join(kobj); |
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kobj->parent = parent; |
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} |
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|
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pr_debug("kobject: '%s' (%p): %s: parent: '%s', set: '%s' ", |
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kobject_name(kobj), kobj, __func__, |
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parent ? kobject_name(parent) : "<NULL>", |
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kobj->kset ? kobject_name(&kobj->kset->kobj) : "<NULL>"); |
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|
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error = create_dir(kobj); |
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if (error) { |
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kobj_kset_leave(kobj); kobject_put(parent); kobj->parent = NULL; |
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/* be noisy on error issues */ if (error == -EEXIST) |
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pr_err("%s failed for %s with -EEXIST, don't try to register things with the same name in the same directory. ", __func__, kobject_name(kobj)); |
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else |
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pr_err("%s failed for %s (error: %d parent: %s) ", __func__, kobject_name(kobj), error, parent ? kobject_name(parent) : "'none'"); |
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} else kobj->state_in_sysfs = 1; |
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return error; } |
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/** |
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* kobject_set_name_vargs - Set the name of an kobject * @kobj: struct kobject to set the name of * @fmt: format string used to build the name * @vargs: vargs to format the string. */ |
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int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, |
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va_list vargs) { |
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const char *s; |
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|
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if (kobj->name && !fmt) return 0; |
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s = kvasprintf_const(GFP_KERNEL, fmt, vargs); |
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if (!s) |
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return -ENOMEM; |
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|
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/* * ewww... some of these buggers have '/' in the name ... If * that's the case, we need to make sure we have an actual * allocated copy to modify, since kvasprintf_const may have * returned something from .rodata. */ if (strchr(s, '/')) { char *t; t = kstrdup(s, GFP_KERNEL); kfree_const(s); if (!t) return -ENOMEM; strreplace(t, '/', '!'); s = t; } kfree_const(kobj->name); |
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kobj->name = s; |
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|
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return 0; } |
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/** |
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* kobject_set_name - Set the name of a kobject |
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* @kobj: struct kobject to set the name of |
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* @fmt: format string used to build the name |
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* |
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* This sets the name of the kobject. If you have already added the * kobject to the system, you must call kobject_rename() in order to * change the name of the kobject. |
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*/ |
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int kobject_set_name(struct kobject *kobj, const char *fmt, ...) |
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{ |
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va_list vargs; |
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int retval; |
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|
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va_start(vargs, fmt); retval = kobject_set_name_vargs(kobj, fmt, vargs); va_end(vargs); |
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|
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return retval; |
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} |
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EXPORT_SYMBOL(kobject_set_name); |
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/** |
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* kobject_init - initialize a kobject structure |
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* @kobj: pointer to the kobject to initialize * @ktype: pointer to the ktype for this kobject. * * This function will properly initialize a kobject such that it can then * be passed to the kobject_add() call. * * After this function is called, the kobject MUST be cleaned up by a call * to kobject_put(), not by a call to kfree directly to ensure that all of * the memory is cleaned up properly. */ |
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void kobject_init(struct kobject *kobj, struct kobj_type *ktype) |
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{ char *err_str; if (!kobj) { err_str = "invalid kobject pointer!"; goto error; } if (!ktype) { err_str = "must have a ktype to be initialized properly! "; goto error; } |
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if (kobj->state_initialized) { |
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/* do not error out as sometimes we can recover */ |
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printk(KERN_ERR "kobject (%p): tried to init an initialized " "object, something is seriously wrong. ", kobj); |
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dump_stack(); } |
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kobject_init_internal(kobj); |
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kobj->ktype = ktype; return; error: |
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printk(KERN_ERR "kobject (%p): %s ", kobj, err_str); |
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dump_stack(); } |
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EXPORT_SYMBOL(kobject_init); |
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|
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static __printf(3, 0) int kobject_add_varg(struct kobject *kobj, struct kobject *parent, const char *fmt, va_list vargs) |
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{ |
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int retval; |
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retval = kobject_set_name_vargs(kobj, fmt, vargs); |
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if (retval) { printk(KERN_ERR "kobject: can not set name properly! "); return retval; } kobj->parent = parent; |
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return kobject_add_internal(kobj); |
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} /** |
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* kobject_add - the main kobject add function |
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* @kobj: the kobject to add * @parent: pointer to the parent of the kobject. * @fmt: format to name the kobject with. * * The kobject name is set and added to the kobject hierarchy in this * function. * * If @parent is set, then the parent of the @kobj will be set to it. * If @parent is NULL, then the parent of the @kobj will be set to the |
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* kobject associated with the kset assigned to this kobject. If no kset |
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* is assigned to the kobject, then the kobject will be located in the * root of the sysfs tree. * * If this function returns an error, kobject_put() must be called to * properly clean up the memory associated with the object. |
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* Under no instance should the kobject that is passed to this function * be directly freed with a call to kfree(), that can leak memory. * |
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* Note, no "add" uevent will be created with this call, the caller should set |
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* up all of the necessary sysfs files for the object and then call * kobject_uevent() with the UEVENT_ADD parameter to ensure that * userspace is properly notified of this kobject's creation. */ |
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int kobject_add(struct kobject *kobj, struct kobject *parent, const char *fmt, ...) |
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{ va_list args; int retval; if (!kobj) return -EINVAL; |
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if (!kobj->state_initialized) { printk(KERN_ERR "kobject '%s' (%p): tried to add an " "uninitialized object, something is seriously wrong. ", kobject_name(kobj), kobj); dump_stack(); return -EINVAL; } |
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va_start(args, fmt); retval = kobject_add_varg(kobj, parent, fmt, args); va_end(args); return retval; } |
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EXPORT_SYMBOL(kobject_add); |
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|
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/** |
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* kobject_init_and_add - initialize a kobject structure and add it to the kobject hierarchy * @kobj: pointer to the kobject to initialize * @ktype: pointer to the ktype for this kobject. * @parent: pointer to the parent of this kobject. * @fmt: the name of the kobject. * |
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* This function combines the call to kobject_init() and |
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* kobject_add(). The same type of error handling after a call to * kobject_add() and kobject lifetime rules are the same here. |
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*/ int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype, struct kobject *parent, const char *fmt, ...) { va_list args; int retval; |
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kobject_init(kobj, ktype); |
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va_start(args, fmt); retval = kobject_add_varg(kobj, parent, fmt, args); va_end(args); return retval; } EXPORT_SYMBOL_GPL(kobject_init_and_add); /** |
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* kobject_rename - change the name of an object * @kobj: object in question. * @new_name: object's new name |
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* * It is the responsibility of the caller to provide mutual * exclusion between two different calls of kobject_rename * on the same kobject and to ensure that new_name is valid and * won't conflict with other kobjects. |
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446 |
*/ |
e374a2bfe Kobject: fix codi... |
447 |
int kobject_rename(struct kobject *kobj, const char *new_name) |
1da177e4c Linux-2.6.12-rc2 |
448 449 |
{ int error = 0; |
ca2f37dbc Driver core: noti... |
450 |
const char *devpath = NULL; |
0b4a4fea2 kobject: Cleanup ... |
451 |
const char *dup_name = NULL, *name; |
ca2f37dbc Driver core: noti... |
452 453 |
char *devpath_string = NULL; char *envp[2]; |
1da177e4c Linux-2.6.12-rc2 |
454 455 456 457 |
kobj = kobject_get(kobj); if (!kobj) return -EINVAL; |
b592fcfe7 sysfs: Shadow dir... |
458 459 |
if (!kobj->parent) return -EINVAL; |
ca2f37dbc Driver core: noti... |
460 461 462 463 464 465 466 467 468 469 470 471 472 473 |
devpath = kobject_get_path(kobj, GFP_KERNEL); if (!devpath) { error = -ENOMEM; goto out; } devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL); if (!devpath_string) { error = -ENOMEM; goto out; } sprintf(devpath_string, "DEVPATH_OLD=%s", devpath); envp[0] = devpath_string; envp[1] = NULL; |
ca2f37dbc Driver core: noti... |
474 |
|
f773f32d7 lib/kobject.c: us... |
475 |
name = dup_name = kstrdup_const(new_name, GFP_KERNEL); |
0b4a4fea2 kobject: Cleanup ... |
476 477 478 479 |
if (!name) { error = -ENOMEM; goto out; } |
e34ff4906 sysfs: remove kty... |
480 |
error = sysfs_rename_dir_ns(kobj, new_name, kobject_namespace(kobj)); |
0b4a4fea2 kobject: Cleanup ... |
481 482 483 484 485 486 |
if (error) goto out; /* Install the new kobject name */ dup_name = kobj->name; kobj->name = name; |
ca2f37dbc Driver core: noti... |
487 488 489 490 |
/* This function is mostly/only used for network interface. * Some hotplug package track interfaces by their name and * therefore want to know when the name is changed by the user. */ |
0b4a4fea2 kobject: Cleanup ... |
491 |
kobject_uevent_env(kobj, KOBJ_MOVE, envp); |
ca2f37dbc Driver core: noti... |
492 493 |
out: |
f773f32d7 lib/kobject.c: us... |
494 |
kfree_const(dup_name); |
ca2f37dbc Driver core: noti... |
495 496 |
kfree(devpath_string); kfree(devpath); |
b592fcfe7 sysfs: Shadow dir... |
497 498 499 500 |
kobject_put(kobj); return error; } |
8344b568f PCI: ACPI PCI slo... |
501 |
EXPORT_SYMBOL_GPL(kobject_rename); |
b592fcfe7 sysfs: Shadow dir... |
502 503 |
/** |
e374a2bfe Kobject: fix codi... |
504 505 506 |
* kobject_move - move object to another parent * @kobj: object in question. * @new_parent: object's new parent (can be NULL) |
8a82472f8 driver core: Intr... |
507 |
*/ |
8a82472f8 driver core: Intr... |
508 509 510 511 512 513 514 515 516 517 518 519 520 |
int kobject_move(struct kobject *kobj, struct kobject *new_parent) { int error; struct kobject *old_parent; const char *devpath = NULL; char *devpath_string = NULL; char *envp[2]; kobj = kobject_get(kobj); if (!kobj) return -EINVAL; new_parent = kobject_get(new_parent); if (!new_parent) { |
c744aeae9 driver core: Allo... |
521 522 |
if (kobj->kset) new_parent = kobject_get(&kobj->kset->kobj); |
8a82472f8 driver core: Intr... |
523 |
} |
e34ff4906 sysfs: remove kty... |
524 |
|
8a82472f8 driver core: Intr... |
525 526 527 528 529 530 531 532 533 534 535 536 537 538 |
/* old object path */ devpath = kobject_get_path(kobj, GFP_KERNEL); if (!devpath) { error = -ENOMEM; goto out; } devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL); if (!devpath_string) { error = -ENOMEM; goto out; } sprintf(devpath_string, "DEVPATH_OLD=%s", devpath); envp[0] = devpath_string; envp[1] = NULL; |
e34ff4906 sysfs: remove kty... |
539 |
error = sysfs_move_dir_ns(kobj, new_parent, kobject_namespace(kobj)); |
8a82472f8 driver core: Intr... |
540 541 542 543 |
if (error) goto out; old_parent = kobj->parent; kobj->parent = new_parent; |
9e993efb0 kobject: new_devi... |
544 |
new_parent = NULL; |
8a82472f8 driver core: Intr... |
545 546 547 |
kobject_put(old_parent); kobject_uevent_env(kobj, KOBJ_MOVE, envp); out: |
9e993efb0 kobject: new_devi... |
548 |
kobject_put(new_parent); |
8a82472f8 driver core: Intr... |
549 550 551 552 553 |
kobject_put(kobj); kfree(devpath_string); kfree(devpath); return error; } |
24199d206 lib: export symbo... |
554 |
EXPORT_SYMBOL_GPL(kobject_move); |
8a82472f8 driver core: Intr... |
555 556 |
/** |
e374a2bfe Kobject: fix codi... |
557 558 |
* kobject_del - unlink kobject from hierarchy. * @kobj: object. |
1da177e4c Linux-2.6.12-rc2 |
559 |
*/ |
e374a2bfe Kobject: fix codi... |
560 |
void kobject_del(struct kobject *kobj) |
1da177e4c Linux-2.6.12-rc2 |
561 |
{ |
324a56e16 kernfs: s/sysfs_d... |
562 |
struct kernfs_node *sd; |
26ea12dec kobject: grab an ... |
563 |
|
31b9025aa Kobject: make kob... |
564 565 |
if (!kobj) return; |
0f4dafc05 Kobject: auto-cle... |
566 |
|
26ea12dec kobject: grab an ... |
567 |
sd = kobj->sd; |
1da177e4c Linux-2.6.12-rc2 |
568 |
sysfs_remove_dir(kobj); |
26ea12dec kobject: grab an ... |
569 |
sysfs_put(sd); |
0f4dafc05 Kobject: auto-cle... |
570 571 572 573 |
kobj->state_in_sysfs = 0; kobj_kset_leave(kobj); kobject_put(kobj->parent); kobj->parent = NULL; |
1da177e4c Linux-2.6.12-rc2 |
574 |
} |
fa40ae344 kobject: move EXP... |
575 |
EXPORT_SYMBOL(kobject_del); |
1da177e4c Linux-2.6.12-rc2 |
576 577 |
/** |
e374a2bfe Kobject: fix codi... |
578 579 |
* kobject_get - increment refcount for object. * @kobj: object. |
1da177e4c Linux-2.6.12-rc2 |
580 |
*/ |
e374a2bfe Kobject: fix codi... |
581 |
struct kobject *kobject_get(struct kobject *kobj) |
1da177e4c Linux-2.6.12-rc2 |
582 |
{ |
d82d54af7 kobject: WARN as ... |
583 584 585 586 587 588 |
if (kobj) { if (!kobj->state_initialized) WARN(1, KERN_WARNING "kobject: '%s' (%p): is not " "initialized, yet kobject_get() is being " "called. ", kobject_name(kobj), kobj); |
1da177e4c Linux-2.6.12-rc2 |
589 |
kref_get(&kobj->kref); |
d82d54af7 kobject: WARN as ... |
590 |
} |
1da177e4c Linux-2.6.12-rc2 |
591 592 |
return kobj; } |
fa40ae344 kobject: move EXP... |
593 |
EXPORT_SYMBOL(kobject_get); |
1da177e4c Linux-2.6.12-rc2 |
594 |
|
c70c176ff kobject: Export k... |
595 |
struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj) |
a49b7e82c kobject: fix kset... |
596 |
{ |
c70c176ff kobject: Export k... |
597 598 |
if (!kobj) return NULL; |
a49b7e82c kobject: fix kset... |
599 600 601 602 |
if (!kref_get_unless_zero(&kobj->kref)) kobj = NULL; return kobj; } |
c70c176ff kobject: Export k... |
603 |
EXPORT_SYMBOL(kobject_get_unless_zero); |
a49b7e82c kobject: fix kset... |
604 |
|
18041f477 kobject: make kob... |
605 606 607 |
/* * kobject_cleanup - free kobject resources. * @kobj: object to cleanup |
1da177e4c Linux-2.6.12-rc2 |
608 |
*/ |
18041f477 kobject: make kob... |
609 |
static void kobject_cleanup(struct kobject *kobj) |
1da177e4c Linux-2.6.12-rc2 |
610 |
{ |
0f4dafc05 Kobject: auto-cle... |
611 |
struct kobj_type *t = get_ktype(kobj); |
af5ca3f4e Driver core: chan... |
612 |
const char *name = kobj->name; |
1da177e4c Linux-2.6.12-rc2 |
613 |
|
c817a67ec kobject: delayed ... |
614 615 616 |
pr_debug("kobject: '%s' (%p): %s, parent %p ", kobject_name(kobj), kobj, __func__, kobj->parent); |
0f4dafc05 Kobject: auto-cle... |
617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 |
if (t && !t->release) pr_debug("kobject: '%s' (%p): does not have a release() " "function, it is broken and must be fixed. ", kobject_name(kobj), kobj); /* send "remove" if the caller did not do it but sent "add" */ if (kobj->state_add_uevent_sent && !kobj->state_remove_uevent_sent) { pr_debug("kobject: '%s' (%p): auto cleanup 'remove' event ", kobject_name(kobj), kobj); kobject_uevent(kobj, KOBJ_REMOVE); } /* remove from sysfs if the caller did not do it */ if (kobj->state_in_sysfs) { pr_debug("kobject: '%s' (%p): auto cleanup kobject_del ", kobject_name(kobj), kobj); kobject_del(kobj); } |
ce2c9cb02 kobject: remove t... |
639 |
if (t && t->release) { |
0f4dafc05 Kobject: auto-cle... |
640 641 642 |
pr_debug("kobject: '%s' (%p): calling ktype release ", kobject_name(kobj), kobj); |
1da177e4c Linux-2.6.12-rc2 |
643 |
t->release(kobj); |
0f4dafc05 Kobject: auto-cle... |
644 645 646 |
} /* free name if we allocated it */ |
af5ca3f4e Driver core: chan... |
647 |
if (name) { |
0f4dafc05 Kobject: auto-cle... |
648 649 |
pr_debug("kobject: '%s': free name ", name); |
f773f32d7 lib/kobject.c: us... |
650 |
kfree_const(name); |
ce2c9cb02 kobject: remove t... |
651 |
} |
1da177e4c Linux-2.6.12-rc2 |
652 |
} |
c817a67ec kobject: delayed ... |
653 654 655 656 657 658 659 |
#ifdef CONFIG_DEBUG_KOBJECT_RELEASE static void kobject_delayed_cleanup(struct work_struct *work) { kobject_cleanup(container_of(to_delayed_work(work), struct kobject, release)); } #endif |
1da177e4c Linux-2.6.12-rc2 |
660 661 |
static void kobject_release(struct kref *kref) { |
c817a67ec kobject: delayed ... |
662 663 |
struct kobject *kobj = container_of(kref, struct kobject, kref); #ifdef CONFIG_DEBUG_KOBJECT_RELEASE |
89c86a64c kobject: delay ko... |
664 665 666 667 |
unsigned long delay = HZ + HZ * (get_random_int() & 0x3); pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld) ", kobject_name(kobj), kobj, __func__, kobj->parent, delay); |
c817a67ec kobject: delayed ... |
668 |
INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); |
89c86a64c kobject: delay ko... |
669 670 |
schedule_delayed_work(&kobj->release, delay); |
c817a67ec kobject: delayed ... |
671 672 673 |
#else kobject_cleanup(kobj); #endif |
1da177e4c Linux-2.6.12-rc2 |
674 675 676 |
} /** |
e374a2bfe Kobject: fix codi... |
677 678 |
* kobject_put - decrement refcount for object. * @kobj: object. |
1da177e4c Linux-2.6.12-rc2 |
679 |
* |
e374a2bfe Kobject: fix codi... |
680 |
* Decrement the refcount, and if 0, call kobject_cleanup(). |
1da177e4c Linux-2.6.12-rc2 |
681 |
*/ |
e374a2bfe Kobject: fix codi... |
682 |
void kobject_put(struct kobject *kobj) |
1da177e4c Linux-2.6.12-rc2 |
683 |
{ |
c1ebdae51 kobject: catch ko... |
684 |
if (kobj) { |
d955c78ac Example use of WA... |
685 686 |
if (!kobj->state_initialized) WARN(1, KERN_WARNING "kobject: '%s' (%p): is not " |
c1ebdae51 kobject: catch ko... |
687 688 689 |
"initialized, yet kobject_put() is being " "called. ", kobject_name(kobj), kobj); |
1da177e4c Linux-2.6.12-rc2 |
690 |
kref_put(&kobj->kref, kobject_release); |
c1ebdae51 kobject: catch ko... |
691 |
} |
1da177e4c Linux-2.6.12-rc2 |
692 |
} |
fa40ae344 kobject: move EXP... |
693 |
EXPORT_SYMBOL(kobject_put); |
1da177e4c Linux-2.6.12-rc2 |
694 |
|
3f9e3ee9d kobject: add kobj... |
695 |
static void dynamic_kobj_release(struct kobject *kobj) |
7423172a5 [PATCH] kobject_a... |
696 |
{ |
810304db7 lib: replace rema... |
697 698 |
pr_debug("kobject: (%p): %s ", kobj, __func__); |
7423172a5 [PATCH] kobject_a... |
699 700 |
kfree(kobj); } |
3f9e3ee9d kobject: add kobj... |
701 |
static struct kobj_type dynamic_kobj_ktype = { |
386f275f5 Driver Core: swit... |
702 703 |
.release = dynamic_kobj_release, .sysfs_ops = &kobj_sysfs_ops, |
7423172a5 [PATCH] kobject_a... |
704 |
}; |
43968d2f1 kobject: get rid ... |
705 |
/** |
3f9e3ee9d kobject: add kobj... |
706 707 708 709 710 711 |
* kobject_create - create a struct kobject dynamically * * This function creates a kobject structure dynamically and sets it up * to be a "dynamic" kobject with a default release function set up. * * If the kobject was not able to be created, NULL will be returned. |
43968d2f1 kobject: get rid ... |
712 |
* The kobject structure returned from here must be cleaned up with a |
f9cb074bf Kobject: rename k... |
713 |
* call to kobject_put() and not kfree(), as kobject_init() has |
43968d2f1 kobject: get rid ... |
714 |
* already been called on this structure. |
3f9e3ee9d kobject: add kobj... |
715 |
*/ |
43968d2f1 kobject: get rid ... |
716 |
struct kobject *kobject_create(void) |
3f9e3ee9d kobject: add kobj... |
717 718 719 720 721 722 |
{ struct kobject *kobj; kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); if (!kobj) return NULL; |
f9cb074bf Kobject: rename k... |
723 |
kobject_init(kobj, &dynamic_kobj_ktype); |
3f9e3ee9d kobject: add kobj... |
724 725 726 727 728 729 |
return kobj; } /** * kobject_create_and_add - create a struct kobject dynamically and register it with sysfs * |
9ff1f838e kobject: fix the ... |
730 |
* @name: the name for the kobject |
3f9e3ee9d kobject: add kobj... |
731 732 |
* @parent: the parent kobject of this kobject, if any. * |
f70701a34 kobject: kerneldo... |
733 |
* This function creates a kobject structure dynamically and registers it |
3f9e3ee9d kobject: add kobj... |
734 |
* with sysfs. When you are finished with this structure, call |
78a2d906b Kobject: convert ... |
735 |
* kobject_put() and the structure will be dynamically freed when |
3f9e3ee9d kobject: add kobj... |
736 737 738 739 740 741 742 743 744 745 746 747 |
* it is no longer being used. * * If the kobject was not able to be created, NULL will be returned. */ struct kobject *kobject_create_and_add(const char *name, struct kobject *parent) { struct kobject *kobj; int retval; kobj = kobject_create(); if (!kobj) return NULL; |
b2d6db587 Kobject: rename k... |
748 |
retval = kobject_add(kobj, parent, "%s", name); |
3f9e3ee9d kobject: add kobj... |
749 750 751 |
if (retval) { printk(KERN_WARNING "%s: kobject_add error: %d ", |
810304db7 lib: replace rema... |
752 |
__func__, retval); |
3f9e3ee9d kobject: add kobj... |
753 754 755 756 757 758 |
kobject_put(kobj); kobj = NULL; } return kobj; } EXPORT_SYMBOL_GPL(kobject_create_and_add); |
7423172a5 [PATCH] kobject_a... |
759 |
/** |
e374a2bfe Kobject: fix codi... |
760 761 |
* kset_init - initialize a kset for use * @k: kset |
1da177e4c Linux-2.6.12-rc2 |
762 |
*/ |
e374a2bfe Kobject: fix codi... |
763 |
void kset_init(struct kset *k) |
1da177e4c Linux-2.6.12-rc2 |
764 |
{ |
e1543ddf7 Kobject: remove k... |
765 |
kobject_init_internal(&k->kobj); |
1da177e4c Linux-2.6.12-rc2 |
766 767 768 |
INIT_LIST_HEAD(&k->list); spin_lock_init(&k->list_lock); } |
23b5212cc Driver Core: add ... |
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 |
/* default kobject attribute operations */ static ssize_t kobj_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct kobj_attribute *kattr; ssize_t ret = -EIO; kattr = container_of(attr, struct kobj_attribute, attr); if (kattr->show) ret = kattr->show(kobj, kattr, buf); return ret; } static ssize_t kobj_attr_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) { struct kobj_attribute *kattr; ssize_t ret = -EIO; kattr = container_of(attr, struct kobj_attribute, attr); if (kattr->store) ret = kattr->store(kobj, kattr, buf, count); return ret; } |
52cf25d0a Driver core: Cons... |
793 |
const struct sysfs_ops kobj_sysfs_ops = { |
23b5212cc Driver Core: add ... |
794 795 796 |
.show = kobj_attr_show, .store = kobj_attr_store, }; |
29dfe2dc0 kobject: export k... |
797 |
EXPORT_SYMBOL_GPL(kobj_sysfs_ops); |
1da177e4c Linux-2.6.12-rc2 |
798 799 |
/** |
e374a2bfe Kobject: fix codi... |
800 801 |
* kset_register - initialize and add a kset. * @k: kset. |
1da177e4c Linux-2.6.12-rc2 |
802 |
*/ |
e374a2bfe Kobject: fix codi... |
803 |
int kset_register(struct kset *k) |
1da177e4c Linux-2.6.12-rc2 |
804 |
{ |
80f03e349 Driver core: add ... |
805 |
int err; |
31b9025aa Kobject: make kob... |
806 807 |
if (!k) return -EINVAL; |
80f03e349 Driver core: add ... |
808 |
|
1da177e4c Linux-2.6.12-rc2 |
809 |
kset_init(k); |
12e339ac6 Kset: remove kset... |
810 |
err = kobject_add_internal(&k->kobj); |
80f03e349 Driver core: add ... |
811 812 813 814 |
if (err) return err; kobject_uevent(&k->kobj, KOBJ_ADD); return 0; |
1da177e4c Linux-2.6.12-rc2 |
815 |
} |
fa40ae344 kobject: move EXP... |
816 |
EXPORT_SYMBOL(kset_register); |
1da177e4c Linux-2.6.12-rc2 |
817 |
|
1da177e4c Linux-2.6.12-rc2 |
818 |
/** |
e374a2bfe Kobject: fix codi... |
819 820 |
* kset_unregister - remove a kset. * @k: kset. |
1da177e4c Linux-2.6.12-rc2 |
821 |
*/ |
e374a2bfe Kobject: fix codi... |
822 |
void kset_unregister(struct kset *k) |
1da177e4c Linux-2.6.12-rc2 |
823 |
{ |
31b9025aa Kobject: make kob... |
824 825 |
if (!k) return; |
35a5fe695 kobject: remove k... |
826 |
kobject_del(&k->kobj); |
78a2d906b Kobject: convert ... |
827 |
kobject_put(&k->kobj); |
1da177e4c Linux-2.6.12-rc2 |
828 |
} |
fa40ae344 kobject: move EXP... |
829 |
EXPORT_SYMBOL(kset_unregister); |
1da177e4c Linux-2.6.12-rc2 |
830 |
|
1da177e4c Linux-2.6.12-rc2 |
831 |
/** |
e374a2bfe Kobject: fix codi... |
832 833 834 |
* kset_find_obj - search for object in kset. * @kset: kset we're looking in. * @name: object's name. |
1da177e4c Linux-2.6.12-rc2 |
835 |
* |
e374a2bfe Kobject: fix codi... |
836 837 838 |
* Lock kset via @kset->subsys, and iterate over @kset->list, * looking for a matching kobject. If matching object is found * take a reference and return the object. |
1da177e4c Linux-2.6.12-rc2 |
839 |
*/ |
e374a2bfe Kobject: fix codi... |
840 |
struct kobject *kset_find_obj(struct kset *kset, const char *name) |
1da177e4c Linux-2.6.12-rc2 |
841 |
{ |
c6a2a3dc2 Kobject: Replace ... |
842 |
struct kobject *k; |
e374a2bfe Kobject: fix codi... |
843 |
struct kobject *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
844 845 |
spin_lock(&kset->list_lock); |
c25d1dfbd kobject: Introduc... |
846 |
|
c6a2a3dc2 Kobject: Replace ... |
847 |
list_for_each_entry(k, &kset->list, entry) { |
e374a2bfe Kobject: fix codi... |
848 |
if (kobject_name(k) && !strcmp(kobject_name(k), name)) { |
a49b7e82c kobject: fix kset... |
849 |
ret = kobject_get_unless_zero(k); |
1da177e4c Linux-2.6.12-rc2 |
850 851 852 |
break; } } |
c25d1dfbd kobject: Introduc... |
853 |
|
1da177e4c Linux-2.6.12-rc2 |
854 855 856 |
spin_unlock(&kset->list_lock); return ret; } |
2fe829aca kobject: export k... |
857 |
EXPORT_SYMBOL_GPL(kset_find_obj); |
1da177e4c Linux-2.6.12-rc2 |
858 |
|
b727c7028 kset: add kset_cr... |
859 860 861 |
static void kset_release(struct kobject *kobj) { struct kset *kset = container_of(kobj, struct kset, kobj); |
9f66fa2a4 kobject: clean up... |
862 863 |
pr_debug("kobject: '%s' (%p): %s ", |
810304db7 lib: replace rema... |
864 |
kobject_name(kobj), kobj, __func__); |
b727c7028 kset: add kset_cr... |
865 866 |
kfree(kset); } |
386f275f5 Driver Core: swit... |
867 868 |
static struct kobj_type kset_ktype = { .sysfs_ops = &kobj_sysfs_ops, |
b727c7028 kset: add kset_cr... |
869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 |
.release = kset_release, }; /** * kset_create - create a struct kset dynamically * * @name: the name for the kset * @uevent_ops: a struct kset_uevent_ops for the kset * @parent_kobj: the parent kobject of this kset, if any. * * This function creates a kset structure dynamically. This structure can * then be registered with the system and show up in sysfs with a call to * kset_register(). When you are finished with this structure, if * kset_register() has been called, call kset_unregister() and the * structure will be dynamically freed when it is no longer being used. * * If the kset was not able to be created, NULL will be returned. */ static struct kset *kset_create(const char *name, |
9cd43611c kobject: Constify... |
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const struct kset_uevent_ops *uevent_ops, |
b727c7028 kset: add kset_cr... |
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struct kobject *parent_kobj) { struct kset *kset; |
d9cd8f378 kobject: make kse... |
892 |
int retval; |
b727c7028 kset: add kset_cr... |
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kset = kzalloc(sizeof(*kset), GFP_KERNEL); if (!kset) return NULL; |
b7165ebbf kobject: sanitize... |
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retval = kobject_set_name(&kset->kobj, "%s", name); |
d9cd8f378 kobject: make kse... |
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if (retval) { kfree(kset); return NULL; } |
b727c7028 kset: add kset_cr... |
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kset->uevent_ops = uevent_ops; kset->kobj.parent = parent_kobj; /* |
386f275f5 Driver Core: swit... |
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* The kobject of this kset will have a type of kset_ktype and belong to |
b727c7028 kset: add kset_cr... |
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* no kset itself. That way we can properly free it when it is * finished being used. */ |
386f275f5 Driver Core: swit... |
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kset->kobj.ktype = &kset_ktype; |
b727c7028 kset: add kset_cr... |
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kset->kobj.kset = NULL; return kset; } /** * kset_create_and_add - create a struct kset dynamically and add it to sysfs * * @name: the name for the kset * @uevent_ops: a struct kset_uevent_ops for the kset * @parent_kobj: the parent kobject of this kset, if any. * * This function creates a kset structure dynamically and registers it * with sysfs. When you are finished with this structure, call * kset_unregister() and the structure will be dynamically freed when it * is no longer being used. * * If the kset was not able to be created, NULL will be returned. */ struct kset *kset_create_and_add(const char *name, |
9cd43611c kobject: Constify... |
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const struct kset_uevent_ops *uevent_ops, |
b727c7028 kset: add kset_cr... |
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struct kobject *parent_kobj) { struct kset *kset; int error; kset = kset_create(name, uevent_ops, parent_kobj); if (!kset) return NULL; error = kset_register(kset); if (error) { kfree(kset); return NULL; } return kset; } EXPORT_SYMBOL_GPL(kset_create_and_add); |
bc451f205 kobj: Add basic i... |
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static DEFINE_SPINLOCK(kobj_ns_type_lock); static const struct kobj_ns_type_operations *kobj_ns_ops_tbl[KOBJ_NS_TYPES]; int kobj_ns_type_register(const struct kobj_ns_type_operations *ops) { enum kobj_ns_type type = ops->type; int error; spin_lock(&kobj_ns_type_lock); error = -EINVAL; if (type >= KOBJ_NS_TYPES) goto out; error = -EINVAL; if (type <= KOBJ_NS_TYPE_NONE) goto out; error = -EBUSY; if (kobj_ns_ops_tbl[type]) goto out; error = 0; kobj_ns_ops_tbl[type] = ops; out: spin_unlock(&kobj_ns_type_lock); return error; } int kobj_ns_type_registered(enum kobj_ns_type type) { int registered = 0; spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES)) registered = kobj_ns_ops_tbl[type] != NULL; spin_unlock(&kobj_ns_type_lock); return registered; } const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent) { const struct kobj_ns_type_operations *ops = NULL; |
41fb96a4b kobject: fix NULL... |
994 |
if (parent && parent->ktype && parent->ktype->child_ns_type) |
bc451f205 kobj: Add basic i... |
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ops = parent->ktype->child_ns_type(parent); return ops; } const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj) { return kobj_child_ns_ops(kobj->parent); } |
7dc5dbc87 sysfs: Restrict m... |
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bool kobj_ns_current_may_mount(enum kobj_ns_type type) { |
730d7d339 sysfs: Allow moun... |
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bool may_mount = true; |
7dc5dbc87 sysfs: Restrict m... |
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spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && kobj_ns_ops_tbl[type]) may_mount = kobj_ns_ops_tbl[type]->current_may_mount(); spin_unlock(&kobj_ns_type_lock); return may_mount; } |
bc451f205 kobj: Add basic i... |
1016 |
|
a685e0898 Delay struct net ... |
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void *kobj_ns_grab_current(enum kobj_ns_type type) |
bc451f205 kobj: Add basic i... |
1018 |
{ |
a685e0898 Delay struct net ... |
1019 |
void *ns = NULL; |
bc451f205 kobj: Add basic i... |
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spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && kobj_ns_ops_tbl[type]) |
a685e0898 Delay struct net ... |
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ns = kobj_ns_ops_tbl[type]->grab_current_ns(); |
bc451f205 kobj: Add basic i... |
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spin_unlock(&kobj_ns_type_lock); return ns; } const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk) { const void *ns = NULL; spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && kobj_ns_ops_tbl[type]) ns = kobj_ns_ops_tbl[type]->netlink_ns(sk); spin_unlock(&kobj_ns_type_lock); return ns; } const void *kobj_ns_initial(enum kobj_ns_type type) { const void *ns = NULL; spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && kobj_ns_ops_tbl[type]) ns = kobj_ns_ops_tbl[type]->initial_ns(); spin_unlock(&kobj_ns_type_lock); return ns; } |
a685e0898 Delay struct net ... |
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void kobj_ns_drop(enum kobj_ns_type type, void *ns) |
bc451f205 kobj: Add basic i... |
1056 |
{ |
a685e0898 Delay struct net ... |
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spin_lock(&kobj_ns_type_lock); if ((type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES) && kobj_ns_ops_tbl[type] && kobj_ns_ops_tbl[type]->drop_ns) kobj_ns_ops_tbl[type]->drop_ns(ns); spin_unlock(&kobj_ns_type_lock); |
bc451f205 kobj: Add basic i... |
1062 |
} |