cregit-Linux how code gets into the kernel

Release 4.7 lib/kobject.c

Directory: lib
/*
 * kobject.c - library routines for handling generic kernel objects
 *
 * Copyright (c) 2002-2003 Patrick Mochel <mochel@osdl.org>
 * Copyright (c) 2006-2007 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (c) 2006-2007 Novell Inc.
 *
 * 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>
#include <linux/export.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/random.h>

/**
 * 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; return kobj->ktype->namespace(kobj); }

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PersonTokensPropCommitsCommitProp
tejun heotejun heo4697.87%150.00%
linus torvaldslinus torvalds12.13%150.00%
Total47100.00%2100.00%

/* * populate_dir - populate directory with attributes. * @kobj: object we're working on. * * 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. */
static int populate_dir(struct kobject *kobj) { struct kobj_type *t = get_ktype(kobj); struct attribute *attr; int error = 0; int i; if (t && t->default_attrs) { for (i = 0; (attr = t->default_attrs[i]) != NULL; i++) { error = sysfs_create_file(kobj, attr); if (error) break; } } return error; }

Contributors

PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel5362.35%457.14%
greg kroah-hartmangreg kroah-hartman3035.29%228.57%
mika kukkonenmika kukkonen22.35%114.29%
Total85100.00%7100.00%


static int create_dir(struct kobject *kobj) { const struct kobj_ns_type_operations *ops; int error; error = sysfs_create_dir_ns(kobj, kobject_namespace(kobj)); if (error) return error; error = populate_dir(kobj); if (error) { sysfs_remove_dir(kobj); return error; } /* * @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); /* * 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)); sysfs_enable_ns(kobj->sd); } return 0; }

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PersonTokensPropCommitsCommitProp
tejun heotejun heo7864.46%466.67%
greg kroah-hartmangreg kroah-hartman4335.54%233.33%
Total121100.00%6100.00%


static int get_kobj_path_length(struct kobject *kobj) { int length = 1; struct kobject *parent = kobj; /* walk up the ancestors until we hit the one pointing to the * root. * Add 1 to strlen for leading '/' of each level. */ do { if (kobject_name(parent) == NULL) return 0; length += strlen(kobject_name(parent)) + 1; parent = parent->parent; } while (parent); return length; }

Contributors

PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman5076.92%250.00%
chuck ebbertchuck ebbert1218.46%125.00%
patrick mochelpatrick mochel34.62%125.00%
Total65100.00%4100.00%


static void fill_kobj_path(struct kobject *kobj, char *path, int length) { struct kobject *parent; --length; for (parent = kobj; parent; parent = parent->parent) { int cur = strlen(kobject_name(parent)); /* back up enough to print this name with '/' */ length -= cur; strncpy(path + length, kobject_name(parent), cur); *(path + --length) = '/'; } pr_debug("kobject: '%s' (%p): %s: path = '%s'\n", kobject_name(kobj), kobj, __func__, path); }

Contributors

PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman9192.86%250.00%
patrick mochelpatrick mochel66.12%125.00%
harvey harrisonharvey harrison11.02%125.00%
Total98100.00%4100.00%

/** * kobject_get_path - generate and return the path associated with a given kobj and kset pair. * * @kobj: kobject in question, with which to build the path * @gfp_mask: the allocation type used to allocate the path * * The result must be freed by the caller with kfree(). */
char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask) { char *path; int len; len = get_kobj_path_length(kobj); if (len == 0) return NULL; path = kzalloc(len, gfp_mask); if (!path) return NULL; fill_kobj_path(kobj, path, len); return path; }

Contributors

PersonTokensPropCommitsCommitProp
robert loverobert love5583.33%125.00%
chuck ebbertchuck ebbert913.64%125.00%
burman yanburman yan11.52%125.00%
al viroal viro11.52%125.00%
Total66100.00%4100.00%

EXPORT_SYMBOL_GPL(kobject_get_path); /* add the kobject to its kset's list */
static void kobj_kset_join(struct kobject *kobj) { if (!kobj->kset) return; kset_get(kobj->kset); spin_lock(&kobj->kset->list_lock); list_add_tail(&kobj->entry, &kobj->kset->list); spin_unlock(&kobj->kset->list_lock); }

Contributors

PersonTokensPropCommitsCommitProp
kay sieverskay sievers3252.46%125.00%
patrick mochelpatrick mochel2236.07%125.00%
greg kroah-hartmangreg kroah-hartman711.48%250.00%
Total61100.00%4100.00%

/* remove the kobject from its kset's list */
static void kobj_kset_leave(struct kobject *kobj) { if (!kobj->kset) return; spin_lock(&kobj->kset->list_lock); list_del_init(&kobj->entry); spin_unlock(&kobj->kset->list_lock); kset_put(kobj->kset); }

Contributors

PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel3972.22%125.00%
kay sieverskay sievers814.81%125.00%
greg kroah-hartmangreg kroah-hartman47.41%125.00%
alan sternalan stern35.56%125.00%
Total54100.00%4100.00%


static void kobject_init_internal(struct kobject *kobj) { if (!kobj) return; kref_init(&kobj->kref); INIT_LIST_HEAD(&kobj->entry); kobj->state_in_sysfs = 0; kobj->state_add_uevent_sent = 0; kobj->state_remove_uevent_sent = 0; kobj->state_initialized = 1; }

Contributors

PersonTokensPropCommitsCommitProp
kay sieverskay sievers2543.86%125.00%
greg kroah-hartmangreg kroah-hartman2442.11%125.00%
patrick mochelpatrick mochel58.77%125.00%
alan sternalan stern35.26%125.00%
Total57100.00%4100.00%


static int kobject_add_internal(struct kobject *kobj) { int error = 0; struct kobject *parent; if (!kobj) return -ENOENT; if (!kobj->name || !kobj->name[0]) { WARN(1, "kobject: (%p): attempted to be registered with empty " "name!\n", kobj); return -EINVAL; } parent = kobject_get(kobj->parent); /* join kset if set, use it as parent if we do not already have one */ if (kobj->kset) { if (!parent) parent = kobject_get(&kobj->kset->kobj); kobj_kset_join(kobj); kobj->parent = parent; } pr_debug("kobject: '%s' (%p): %s: parent: '%s', set: '%s'\n", kobject_name(kobj), kobj, __func__, parent ? kobject_name(parent) : "<NULL>", kobj->kset ? kobject_name(&kobj->kset->kobj) : "<NULL>"); error = create_dir(kobj); if (error) { kobj_kset_leave(kobj); kobject_put(parent); kobj->parent = NULL; /* be noisy on error issues */ if (error == -EEXIST) WARN(1, "%s failed for %s with " "-EEXIST, don't try to register things with " "the same name in the same directory.\n", __func__, kobject_name(kobj)); else WARN(1, "%s failed for %s (error: %d parent: %s)\n", __func__, kobject_name(kobj), error, parent ? kobject_name(parent) : "'none'"); } else kobj->state_in_sysfs = 1; return error; }

Contributors

PersonTokensPropCommitsCommitProp
patrick mochelpatrick mochel8937.87%834.78%
greg kroah-hartmangreg kroah-hartman6728.51%1043.48%
kay sieverskay sievers5724.26%28.70%
dan williamsdan williams166.81%14.35%
arjan van de venarjan van de ven31.28%14.35%
harvey harrisonharvey harrison31.28%14.35%
Total235100.00%23100.00%

/** * 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. */
int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, va_list vargs) { const char *s; if (kobj->name && !fmt) return 0; s = kvasprintf_const(GFP_KERNEL, fmt, vargs); if (!s) return -ENOMEM; /* * 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); kobj->name = s; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
rasmus villemoesrasmus villemoes6149.59%228.57%
patrick mochelpatrick mochel2721.95%114.29%
kay sieverskay sievers2419.51%228.57%
greg kroah-hartmangreg kroah-hartman118.94%228.57%
Total123100.00%7100.00%

/** * kobject_set_name - Set the name of a kobject * @kobj: struct kobject to set the name of * @fmt: format string used to build the name * * 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. */
int kobject_set_name(struct kobject *kobj, const char *fmt, ...) { va_list vargs; int retval; va_start(vargs, fmt); retval = kobject_set_name_vargs(kobj, fmt, vargs); va_end(vargs); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman2551.02%125.00%
patrick mochelpatrick mochel1020.41%125.00%
andrew mortonandrew morton1020.41%125.00%
kay sieverskay sievers48.16%125.00%
Total49100.00%4100.00%

EXPORT_SYMBOL(kobject_set_name); /** * kobject_init - initialize a kobject structure * @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. */
void kobject_init(struct kobject *kobj, struct kobj_type *ktype) { char *err_str; if (!kobj) { err_str = "invalid kobject pointer!"; goto error; } if (!ktype) { err_str = "must have a ktype to be initialized properly!\n"; goto error; } if (kobj->state_initialized) { /* do not error out as sometimes we can recover */ printk(KERN_ERR "kobject (%p): tried to init an initialized " "object, something is seriously wrong.\n", kobj); dump_stack(); } kobject_init_internal(kobj); kobj->ktype = ktype; return; error: printk(KERN_ERR "kobject (%p): %s\n", kobj, err_str); dump_stack(); }

Contributors

PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman8791.58%375.00%
kay sieverskay sievers88.42%125.00%
Total95100.00%4100.00%

EXPORT_SYMBOL(kobject_init); static __printf(3, 0) int kobject_add_varg(struct kobject *kobj, struct kobject *parent, const char *fmt, va_list vargs) { int retval; retval = kobject_set_name_vargs(kobj, fmt, vargs); if (retval) { printk(KERN_ERR "kobject: can not set name properly!\n"); return retval; } kobj->parent = parent; return kobject_add_internal(kobj); } /** * kobject_add - the main kobject add function * @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 * kobject associated with the kset assigned to this kobject. If no kset * 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. * Under no instance should the kobject that is passed to this function * be directly freed with a call to kfree(), that can leak memory. * * Note, no "add" uevent will be created with this call, the caller should set * 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. */ int kobject_add(struct kobject *kobj, struct kobject *parent, const char *fmt, ...) { va_list args; int retval; if (!kobj) return -EINVAL; if (!kobj->state_initialized) { printk(KERN_ERR "kobject '%s' (%p): tried to add an " "uninitialized object, something is seriously wrong.\n", kobject_name(kobj), kobj); dump_stack(); return -EINVAL; } va_start(args, fmt); retval = kobject_add_varg(kobj, parent, fmt, args); va_end(args); return retval; } EXPORT_SYMBOL(kobject_add); /** * 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. * * This function combines the call to kobject_init() and * kobject_add(). The same type of error handling after a call to * kobject_add() and kobject lifetime rules are the same here. */
int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype, struct kobject *parent, const char *fmt, ...) { va_list args; int retval; kobject_init(kobj, ktype); va_start(args, fmt); retval = kobject_add_varg(kobj, parent, fmt, args); va_end(args); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman68100.00%2100.00%
Total68100.00%2100.00%

EXPORT_SYMBOL_GPL(kobject_init_and_add); /** * kobject_rename - change the name of an object * @kobj: object in question. * @new_name: object's new name * * 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. */
int kobject_rename(struct kobject *kobj, const char *new_name) { int error = 0; const char *devpath = NULL; const char *dup_name = NULL, *name; char *devpath_string = NULL; char *envp[2]; kobj = kobject_get(kobj); if (!kobj) return -EINVAL; if (!kobj->parent) return -EINVAL; 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; name = dup_name = kstrdup_const(new_name, GFP_KERNEL); if (!name) { error = -ENOMEM; goto out; } error = sysfs_rename_dir_ns(kobj, new_name, kobject_namespace(kobj)); if (error) goto out; /* Install the new kobject name */ dup_name = kobj->name; kobj->name = name; /* 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. */ kobject_uevent_env(kobj, KOBJ_MOVE, envp); out: kfree_const(dup_name); kfree(devpath_string); kfree(devpath); kobject_put(kobj); return error; }

Contributors

PersonTokensPropCommitsCommitProp
jean tourrilhesjean tourrilhes12048.39%112.50%
eric w. biedermaneric w. biederman8032.26%225.00%
greg kroah-hartmangreg kroah-hartman2710.89%112.50%
maneesh sonimaneesh soni124.84%112.50%
tejun heotejun heo62.42%112.50%
rasmus villemoesrasmus villemoes20.81%112.50%
dmitry torokhovdmitry torokhov10.40%112.50%
Total248100.00%8100.00%

EXPORT_SYMBOL_GPL(kobject_rename); /** * kobject_move - move object to another parent * @kobj: object in question. * @new_parent: object's new parent (can be NULL) */
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) { if (kobj->kset) new_parent = kobject_get(&kobj->kset->kobj); } /* 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; error = sysfs_move_dir_ns(kobj, new_parent, kobject_namespace(kobj)); if (error) goto out; old_parent = kobj->parent; kobj->parent = new_parent; new_parent = NULL; kobject_put(old_parent); kobject_uevent_env(kobj, KOBJ_MOVE, envp); out: kobject_put(new_parent); kobject_put(kobj); kfree(devpath_string); kfree(devpath); return error; }

Contributors

PersonTokensPropCommitsCommitProp
cornelia huckcornelia huck22993.85%250.00%
dmitriy monakhovdmitriy monakhov93.69%125.00%
tejun heotejun heo62.46%125.00%
Total244100.00%4100.00%

EXPORT_SYMBOL_GPL(kobject_move); /** * kobject_del - unlink kobject from hierarchy. * @kobj: object. */
void kobject_del(struct kobject *kobj) { struct kernfs_node *sd; if (!kobj) return; sd = kobj->sd; sysfs_remove_dir(kobj); sysfs_put(sd); kobj->state_in_sysfs = 0; kobj_kset_leave(kobj); kobject_put(kobj->parent); kobj->parent = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
kay sieverskay sievers2032.79%114.29%
patrick mochelpatrick mochel1931.15%342.86%
tejun heotejun heo1626.23%228.57%
greg kroah-hartmangreg kroah-hartman69.84%114.29%
Total61100.00%7100.00%

EXPORT_SYMBOL(kobject_del); /** * kobject_get - increment refcount for object. * @kobj: object. */
struct kobject *kobject_get(struct kobject *kobj) { if (kobj) { if (!kobj->state_initialized) WARN(1, KERN_WARNING "kobject: '%s' (%p): is not " "initialized, yet kobject_get() is being " "called.\n", kobject_name(kobj), kobj); kref_get(&kobj->kref); } return kobj; }

Contributors

PersonTokensPropCommitsCommitProp
ethan zhaoethan zhao2649.06%116.67%
patrick mochelpatrick mochel2445.28%350.00%
greg kroah-hartmangreg kroah-hartman35.66%233.33%
Total53100.00%6100.00%

EXPORT_SYMBOL(kobject_get);
static struct kobject * __must_check kobject_get_unless_zero(struct kobject *kobj) { if (!kref_get_unless_zero(&kobj->kref)) kobj = NULL; return kobj; }

Contributors

PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds3196.88%150.00%
anatol pomozovanatol pomozov13.12%150.00%
Total32100.00%2100.00%

/* * kobject_cleanup - free kobject resources. * @kobj: object to cleanup */
static void kobject_cleanup(struct kobject *kobj) { struct kobj_type *t = get_ktype(kobj); const char *name = kobj->name; pr_debug("kobject: '%s' (%p): %s, parent %p\n", kobject_name(kobj), kobj, __func__, kobj->parent); if (t && !t->release) pr_debug("kobject: '%s' (%p): does not have a release() " "function, it is broken and must be fixed.\n", 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\n", 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\n", kobject_name(kobj), kobj); kobject_del(kobj); } if (t && t->release) { pr_debug("kobject: '%s' (%p): calling ktype release\n", kobject_name(kobj), kobj); t->release(kobj); } /* free name if we allocated it */ if (name) { pr_debug("kobject: '%s': free name\n", name); kfree_const(name); } }

Contributors

PersonTokensPropCommitsCommitProp
kay sieverskay sievers10458.76%214.29%
patrick mochelpatrick mochel5028.25%642.86%
greg kroah-hartmangreg kroah-hartman169.04%321.43%
russell kingrussell king52.82%17.14%
harvey harrisonharvey harrison10.56%17.14%
rasmus villemoesrasmus villemoes10.56%17.14%
Total177100.00%14100.00%

#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)); }

Contributors

PersonTokensPropCommitsCommitProp
russell kingrussell king27100.00%1100.00%
Total27100.00%1100.00%

#endif
static void kobject_release(struct kref *kref) { struct kobject *kobj = container_of(kref, struct kobject, kref); #ifdef CONFIG_DEBUG_KOBJECT_RELEASE unsigned long delay = HZ + HZ * (get_random_int() & 0x3); pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld)\n", kobject_name(kobj), kobj, __func__, kobj->parent, delay); INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); schedule_delayed_work(&kobj->release, delay); #else kobject_cleanup(kobj); #endif }

Contributors

PersonTokensPropCommitsCommitProp
russell kingrussell king5154.84%125.00%
greg kroah-hartmangreg kroah-hartman2223.66%125.00%
bjorn helgaasbjorn helgaas1920.43%125.00%
fengguang wufengguang wu11.08%125.00%
Total93100.00%4100.00%

/** * kobject_put - decrement refcount for object. * @kobj: object. * * Decrement the refcount, and if 0, call kobject_cleanup(). */
void kobject_put(struct kobject *kobj) { if (kobj) { if (!kobj->state_initialized) WARN(1, KERN_WARNING "kobject: '%s' (%p): is not " "initialized, yet kobject_put() is being " "called.\n", kobject_name(kobj), kobj); kref_put(&kobj->kref, kobject_release); } }

Contributors

PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman2958.00%233.33%
patrick mochelpatrick mochel1836.00%350.00%
arjan van de venarjan van de ven36.00%116.67%
Total50100.00%6100.00%

EXPORT_SYMBOL(kobject_put);
static void dynamic_kobj_release(struct kobject *kobj) { pr_debug("kobject: (%p): %s\n", kobj, __func__); kfree(kobj); }

Contributors

PersonTokensPropCommitsCommitProp
jun'ichi nomurajun'ichi nomura1560.00%120.00%
greg kroah-hartmangreg kroah-hartman832.00%240.00%
kay sieverskay sievers14.00%120.00%
harvey harrisonharvey harrison14.00%120.00%
Total25100.00%5100.00%

static struct kobj_type dynamic_kobj_ktype = { .release = dynamic_kobj_release, .sysfs_ops = &kobj_sysfs_ops, }; /** * 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. * The kobject structure returned from here must be cleaned up with a * call to kobject_put() and not kfree(), as kobject_init() has * already been called on this structure. */
struct kobject *kobject_create(void) { struct kobject *kobj; kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); if (!kobj) return NULL; kobject_init(kobj, &dynamic_kobj_ktype); return kobj; }

Contributors

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greg kroah-hartmangreg kroah-hartman4495.65%266.67%
jun'ichi nomurajun'ichi nomura24.35%133.33%
Total46100.00%3100.00%

/** * kobject_create_and_add - create a struct kobject dynamically and register it with sysfs * * @name: the name for the kobject * @parent: the parent kobject of this kobject, if any. * * This function creates a kobject structure dynamically and registers it * with sysfs. When you are finished with this structure, call * kobject_put() and the structure will be dynamically freed when * 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; retval = kobject_add(kobj, parent, "%s", name); if (retval) { printk(KERN_WARNING "%s: kobject_add error: %d\n", __func__, retval); kobject_put(kobj); kobj = NULL; } return kobj; }

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greg kroah-hartmangreg kroah-hartman7696.20%250.00%
jun'ichi nomurajun'ichi nomura22.53%125.00%
harvey harrisonharvey harrison11.27%125.00%
Total79100.00%4100.00%

EXPORT_SYMBOL_GPL(kobject_create_and_add); /** * kset_init - initialize a kset for use * @k: kset */
void kset_init(struct kset *k) { kobject_init_internal(&k->kobj); INIT_LIST_HEAD(&k->list); spin_lock_init(&k->list_lock); }

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patrick mochelpatrick mochel2573.53%250.00%
greg kroah-hartmangreg kroah-hartman926.47%250.00%
Total34100.00%4100.00%

/* 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; }

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kay sieverskay sievers65100.00%1100.00%
Total65100.00%1100.00%


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;