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 #define KOBJ_CHANGE 0x01 45 46 struct kobj_type { 47 void (*release)(struct kobject *kobj); 48 const struct sysfs_ops *sysfs_ops; 49 struct attribute **default_attrs; 50 }; 51 52 extern const struct kobj_type linux_kfree_type; 53 54 struct kobject { 55 struct kobject *parent; 56 char *name; 57 struct kref kref; 58 const struct kobj_type *ktype; 59 struct list_head entry; 60 struct sysctl_oid *oidp; 61 }; 62 63 extern struct kobject *mm_kobj; 64 65 struct attribute { 66 const char *name; 67 struct module *owner; 68 mode_t mode; 69 }; 70 71 struct kobj_attribute { 72 struct attribute attr; 73 ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr, 74 char *buf); 75 ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr, 76 const char *buf, size_t count); 77 }; 78 79 static inline void 80 kobject_init(struct kobject *kobj, const struct kobj_type *ktype) 81 { 82 83 kref_init(&kobj->kref); 84 INIT_LIST_HEAD(&kobj->entry); 85 kobj->ktype = ktype; 86 kobj->oidp = NULL; 87 } 88 89 void linux_kobject_release(struct kref *kref); 90 91 static inline void 92 kobject_put(struct kobject *kobj) 93 { 94 95 if (kobj) 96 kref_put(&kobj->kref, linux_kobject_release); 97 } 98 99 static inline struct kobject * 100 kobject_get(struct kobject *kobj) 101 { 102 103 if (kobj) 104 kref_get(&kobj->kref); 105 return kobj; 106 } 107 108 int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, va_list); 109 int kobject_add(struct kobject *kobj, struct kobject *parent, 110 const char *fmt, ...); 111 112 static inline struct kobject * 113 kobject_create(void) 114 { 115 struct kobject *kobj; 116 117 kobj = kzalloc(sizeof(*kobj), GFP_KERNEL); 118 if (kobj == NULL) 119 return (NULL); 120 kobject_init(kobj, &linux_kfree_type); 121 122 return (kobj); 123 } 124 125 static inline struct kobject * 126 kobject_create_and_add(const char *name, struct kobject *parent) 127 { 128 struct kobject *kobj; 129 130 kobj = kobject_create(); 131 if (kobj == NULL) 132 return (NULL); 133 if (kobject_add(kobj, parent, "%s", name) == 0) 134 return (kobj); 135 kobject_put(kobj); 136 137 return (NULL); 138 } 139 140 static inline void 141 kobject_del(struct kobject *kobj __unused) 142 { 143 } 144 145 static inline char * 146 kobject_name(const struct kobject *kobj) 147 { 148 149 return kobj->name; 150 } 151 152 int kobject_set_name(struct kobject *kobj, const char *fmt, ...); 153 int kobject_init_and_add(struct kobject *kobj, const struct kobj_type *ktype, 154 struct kobject *parent, const char *fmt, ...); 155 156 static __inline void 157 kobject_uevent_env(struct kobject *kobj, int action, char *envp[]) 158 { 159 160 /* 161 * iwlwifi(4) sends an INACCESSIBLE event when it detects that the card 162 * (pice endpoint) is gone and it attempts a removal cleanup. 163 * Not sure if we do anything related to udev/sysfs at the moment or 164 * need a shortcut or simply ignore it (for now). 165 */ 166 } 167 168 #endif /* _LINUX_KOBJECT_H_ */ 169