X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=lib%2Fkobject.c;h=b512b746d2aff464e1c18a01c53300ef7b6e68f4;hb=5116fa2b3a0a3ec625a10445ae45667f094c125b;hp=60ae9e817663441a951d15098e057a4cbc366e03;hpb=c1ebdae514a356c71c09035f5141d94aab5e8fe4;p=safe%2Fjmp%2Flinux-2.6 diff --git a/lib/kobject.c b/lib/kobject.c index 60ae9e8..b512b74 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -58,11 +58,6 @@ static int create_dir(struct kobject *kobj) return error; } -static inline struct kobject *to_kobj(struct list_head *entry) -{ - return container_of(entry, struct kobject, entry); -} - static int get_kobj_path_length(struct kobject *kobj) { int length = 1; @@ -95,7 +90,7 @@ static void fill_kobj_path(struct kobject *kobj, char *path, int length) } pr_debug("kobject: '%s' (%p): %s: path = '%s'\n", kobject_name(kobj), - kobj, __FUNCTION__, path); + kobj, __func__, path); } /** @@ -169,9 +164,8 @@ static int kobject_add_internal(struct kobject *kobj) return -ENOENT; if (!kobj->name || !kobj->name[0]) { - pr_debug("kobject: (%p): attempted to be registered with empty " + WARN(1, "kobject: (%p): attempted to be registered with empty " "name!\n", kobj); - WARN_ON(1); return -EINVAL; } @@ -186,7 +180,7 @@ static int kobject_add_internal(struct kobject *kobj) } pr_debug("kobject: '%s' (%p): %s: parent: '%s', set: '%s'\n", - kobject_name(kobj), kobj, __FUNCTION__, + kobject_name(kobj), kobj, __func__, parent ? kobject_name(parent) : "", kobj->kset ? kobject_name(&kobj->kset->kobj) : ""); @@ -201,10 +195,10 @@ static int kobject_add_internal(struct kobject *kobj) printk(KERN_ERR "%s failed for %s with " "-EEXIST, don't try to register things with " "the same name in the same directory.\n", - __FUNCTION__, kobject_name(kobj)); + __func__, kobject_name(kobj)); else printk(KERN_ERR "%s failed for %s (%d)\n", - __FUNCTION__, kobject_name(kobj), error); + __func__, kobject_name(kobj), error); dump_stack(); } else kobj->state_in_sysfs = 1; @@ -218,25 +212,24 @@ static int kobject_add_internal(struct kobject *kobj) * @fmt: format string used to build the name * @vargs: vargs to format the string. */ -static int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, +int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, va_list vargs) { - va_list aq; - char *name; + const char *old_name = kobj->name; + char *s; - va_copy(aq, vargs); - name = kvasprintf(GFP_KERNEL, fmt, vargs); - va_end(aq); + if (kobj->name && !fmt) + return 0; - if (!name) + kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs); + if (!kobj->name) return -ENOMEM; - /* Free the old name, if necessary. */ - kfree(kobj->name); - - /* Now, set the new name */ - kobj->name = name; + /* ewww... some of these buggers have '/' in the name ... */ + while ((s = strchr(kobj->name, '/'))) + s[0] = '!'; + kfree(old_name); return 0; } @@ -251,12 +244,12 @@ static int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, */ int kobject_set_name(struct kobject *kobj, const char *fmt, ...) { - va_list args; + va_list vargs; int retval; - va_start(args, fmt); - retval = kobject_set_name_vargs(kobj, fmt, args); - va_end(args); + va_start(vargs, fmt); + retval = kobject_set_name_vargs(kobj, fmt, vargs); + va_end(vargs); return retval; } @@ -306,12 +299,9 @@ EXPORT_SYMBOL(kobject_init); static int kobject_add_varg(struct kobject *kobj, struct kobject *parent, const char *fmt, va_list vargs) { - va_list aq; int retval; - va_copy(aq, vargs); - retval = kobject_set_name_vargs(kobj, fmt, aq); - va_end(aq); + retval = kobject_set_name_vargs(kobj, fmt, vargs); if (retval) { printk(KERN_ERR "kobject: can not set name properly!\n"); return retval; @@ -400,11 +390,17 @@ 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]; @@ -414,19 +410,6 @@ int kobject_rename(struct kobject *kobj, const char *new_name) if (!kobj->parent) return -EINVAL; - /* see if this name is already in use */ - if (kobj->kset) { - struct kobject *temp_kobj; - temp_kobj = kset_find_obj(kobj->kset, new_name); - if (temp_kobj) { - printk(KERN_WARNING "kobject '%s' cannot be renamed " - "to '%s' as '%s' is already in existence.\n", - kobject_name(kobj), new_name, new_name); - kobject_put(temp_kobj); - return -EINVAL; - } - } - devpath = kobject_get_path(kobj, GFP_KERNEL); if (!devpath) { error = -ENOMEM; @@ -441,21 +424,34 @@ int kobject_rename(struct kobject *kobj, const char *new_name) envp[0] = devpath_string; envp[1] = NULL; + name = dup_name = kstrdup(new_name, GFP_KERNEL); + if (!name) { + error = -ENOMEM; + goto out; + } + error = sysfs_rename_dir(kobj, new_name); + 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. */ - if (!error) - kobject_uevent_env(kobj, KOBJ_MOVE, envp); + kobject_uevent_env(kobj, KOBJ_MOVE, envp); out: + kfree(dup_name); kfree(devpath_string); kfree(devpath); kobject_put(kobj); return error; } +EXPORT_SYMBOL_GPL(kobject_rename); /** * kobject_move - move object to another parent @@ -545,7 +541,7 @@ static void kobject_cleanup(struct kobject *kobj) const char *name = kobj->name; pr_debug("kobject: '%s' (%p): %s\n", - kobject_name(kobj), kobj, __FUNCTION__); + kobject_name(kobj), kobj, __func__); if (t && !t->release) pr_debug("kobject: '%s' (%p): does not have a release() " @@ -593,19 +589,17 @@ static void kobject_release(struct kref *kref) void kobject_put(struct kobject *kobj) { if (kobj) { - if (!kobj->state_initialized) { - printk(KERN_WARNING "kobject: '%s' (%p): is not " + 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); - WARN_ON(1); - } kref_put(&kobj->kref, kobject_release); } } static void dynamic_kobj_release(struct kobject *kobj) { - pr_debug("kobject: (%p): %s\n", kobj, __FUNCTION__); + pr_debug("kobject: (%p): %s\n", kobj, __func__); kfree(kobj); } @@ -662,7 +656,7 @@ struct kobject *kobject_create_and_add(const char *name, struct kobject *parent) retval = kobject_add(kobj, parent, "%s", name); if (retval) { printk(KERN_WARNING "%s: kobject_add error: %d\n", - __FUNCTION__, retval); + __func__, retval); kobject_put(kobj); kobj = NULL; } @@ -752,12 +746,11 @@ void kset_unregister(struct kset *k) */ struct kobject *kset_find_obj(struct kset *kset, const char *name) { - struct list_head *entry; + struct kobject *k; struct kobject *ret = NULL; spin_lock(&kset->list_lock); - list_for_each(entry, &kset->list) { - struct kobject *k = to_kobj(entry); + list_for_each_entry(k, &kset->list, entry) { if (kobject_name(k) && !strcmp(kobject_name(k), name)) { ret = kobject_get(k); break; @@ -771,7 +764,7 @@ static void kset_release(struct kobject *kobj) { struct kset *kset = container_of(kobj, struct kset, kobj); pr_debug("kobject: '%s' (%p): %s\n", - kobject_name(kobj), kobj, __FUNCTION__); + kobject_name(kobj), kobj, __func__); kfree(kset); } @@ -800,11 +793,16 @@ static struct kset *kset_create(const char *name, struct kobject *parent_kobj) { struct kset *kset; + int retval; kset = kzalloc(sizeof(*kset), GFP_KERNEL); if (!kset) return NULL; - kobject_set_name(&kset->kobj, name); + retval = kobject_set_name(&kset->kobj, name); + if (retval) { + kfree(kset); + return NULL; + } kset->uevent_ops = uevent_ops; kset->kobj.parent = parent_kobj;