1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_KOBJECT_H_ 32 #define _LINUX_KOBJECT_H_ 33 34 #include <machine/stdarg.h> 35 36 #include <linux/kernel.h> 37 #include <linux/kref.h> 38 #include <linux/list.h> 39 #include <linux/slab.h> 40 41 struct kobject; 42 struct sysctl_oid; 43 44 struct kobj_type { 45 void (*release)(struct kobject *kobj); 46 const struct sysfs_ops *sysfs_ops; 47 struct attribute **default_attrs; 48 }; 49 50 extern const struct kobj_type linux_kfree_type; 51 52 struct kobject { 53 struct kobject *parent; 54 char *name; 55 struct kref kref; 56 const struct kobj_type *ktype; 57 struct list_head entry; 58 struct sysctl_oid *oidp; 59 }; 60 61 extern struct kobject *mm_kobj; 62 63 struct attribute { 64 const char *name; 65 struct module *owner; 66 mode_t mode; 67 }; 68 69 struct kobj_attribute { 70 struct attribute attr; 71 ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr, 72 char *buf); 73 ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr, 74 const char *buf, size_t count); 75 }; 76 77 static inline void 78 kobject_init(struct kobject *kobj, const struct kobj_type *ktype) 79 { 80 81 kref_init(&kobj->kref); 82 INIT_LIST_HEAD(&kobj->entry); 83 kobj->ktype = ktype; 84 kobj->oidp = NULL; 85 } 86 87 void linux_kobject_release(struct kref *kref); 88 89 static inline void 90 kobject_put(struct kobject *kobj) 91 { 92 93 if (kobj) 94 kref_put(&kobj->kref, linux_kobject_release); 95 } 96 97 static inline struct kobject * 98 kobject_get(struct kobject *kobj) 99 { 100 101 if (kobj) 102 kref_get(&kobj->kref); 103 return kobj; 104 } 105 106 int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, va_list); 107 int kobject_add(struct kobject *kobj, struct kobject *parent, 108 const char *fmt, ...); 109 110 static inline struct kobject * 111 kobject_create(void) 112 { 113 struct kobject *kobj; 114 115 kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); 116 if (kobj == NULL) 117 return (NULL); 118 kobject_init(kobj, &linux_kfree_type); 119 120 return (kobj); 121 } 122 123 static inline struct kobject * 124 kobject_create_and_add(const char *name, struct kobject *parent) 125 { 126 struct kobject *kobj; 127 128 kobj = kobject_create(); 129 if (kobj == NULL) 130 return (NULL); 131 if (kobject_add(kobj, parent, "%s", name) == 0) 132 return (kobj); 133 kobject_put(kobj); 134 135 return (NULL); 136 } 137 138 static inline char * 139 kobject_name(const struct kobject *kobj) 140 { 141 142 return kobj->name; 143 } 144 145 int kobject_set_name(struct kobject *kobj, const char *fmt, ...); 146 int kobject_init_and_add(struct kobject *kobj, const struct kobj_type *ktype, 147 struct kobject *parent, const char *fmt, ...); 148 149 #endif /* _LINUX_KOBJECT_H_ */ 150