kobject_init(&cdev->kobj, &ktype_cdev_default); cdev->ops = fops; } 2. cdev_alloc原型 struct cdev *cdev_alloc(void) 功能 用于分配cdev结构体,并添加到内核中 参数 返回值 成功:返回分配的cdev结构体变量指针 失败: 返回NULL 该函数实现如下: /** * cdev_alloc - allocate a cdev structure *...
sock_alloc_inode函数分配了socket_alloc结构体,也就意味着分配了struct socket和struct inode,并最终返回了socket_alloc结构体成员inode。 故struct socket这个字段出生的时候其实就和一个struct inode结构体伴生出来的,它们俩共同封装在struct socket_alloc中,由sockfs的sock_alloc_inode函数分配的,函数返回的是struct i...
vdev->cdev = cdev_alloc(); vdev->cdev->ops = &v4l2_fops; vdev->cdev->owner = owner; ret = cdev_add(vdev->cdev, MKDEV(VIDEO_MAJOR, vdev->minor), 1); /* 得把device注册进内核,mdev才能自动创建设备节点,/dev 目录下的video0 等就是来自这里 */ vdev->dev.class = &video_class;...
13 cdev = cdev_alloc(); 14 if (!cdev) 15 goto out2; 16 17 cdev->owner = fops->owner; 18 cdev->ops = fops; 19 /*Linux设备模型中的,设置kobject的名字*/ 20 kobject_set_name(&cdev->kobj, "%s", name); 21 for (s = strchr(kobject_name(&cdev->kobj),'/'); s; s = strc...
(cd);12/*分配字符设备*/13cdev =cdev_alloc();14if(!cdev)15gotoout2;1617cdev->owner = fops->owner;18cdev->ops =fops;19/*Linux设备模型中的,设置kobject的名字*/20kobject_set_name(&cdev->kobj,"%s", name);21for(s = strchr(kobject_name(&cdev->kobj),'/'); s; s = strchr(s,'...
struct cdev *i_cdev;//该成员表示字符设备的内核的 内部结构。当inode指向一个字符设备文件时,该成员包含了指向struct cdev结构的指针,其中cdev结构是字符设备结构体。 }; int i_cindex; __u32 i_generation; #ifdef CONFIG_DNOTIFY unsigned long i_dnotify_mask; /* Directory notify events */ ...
void *f_security; #endif /* needed for tty driver, and maybe others */ void *private_data; #ifdef CONFIG_EPOLL /* Used by fs/eventpoll.c to link all the hooks to this file */ struct list_head f_ep_links; spinlock_t f_ep_lock; ...
static inline void ct_assert_unique_top_level_attributes(void) { switch (0) { #include GENL_MAGIC_INCLUDE_FILE case 0: ; } } #undef GENL_struct #define GENL_struct(tag_name, tag_number, s_name, s_fields) \ static inline void ct_assert_unique_ ## s_name ## ...
struct cdev *i_cdev; //该成员表示字符设备的内核的 内部结构。当inode指向一个字符设备文件时,该成员包含了指向struct cdev结构的指针,其中cdev结构是字符设备结构体。 }; int i_cindex; __u32 i_generation; #ifdef CONFIG_DNOTIFY unsigned long i_dnotify_mask; /* Directory notify events */ ...
26 struct cdev cdev;//cdev结构体 27 unsigned char mem[GLOBALMEM_SIZE]; 28 }; 29 struct globalmem_dev *global_dev; 30 static struct class *global_class; 31 //文件打开函数 32 static int globalmem_open(struct inode *inode,struct file *filp) ...