alloc_file

函数名称：alloc_file - allocate and initialize a 'struct file'*@path: the (dentry, vfsmount) pair for the new file*@flags: O_... flags with which the new file will be opened*@fop: the 'struct file_operations' for the new file

函数原型：static struct file *alloc_file(const struct path *path, int flags, const struct file_operations *fop)

返回类型：struct file

参数：

类型	参数	名称
const struct path *	path
int	flags
const struct file_operations *	fop

193

file等于Find an unused file structure and return a pointer to it

194

如果是错误则返回:file

197

f_path等于path

198

cached value 等于 Where the name belongs to - NULL is * negative

199

f_mapping等于i_mapping

200

f_wb_err等于lemap_sample_wb_err - sample the current errseq_t to test for later errors*@mapping: mapping to be sampled* Writeback errors are always reported relative to a particular sample point* in the past. This function provides those sample points.

201

如果f_mode按位与le is open for reading 且此条件成立可能性大(为编译器优化)(read || read_iter)则f_mode或等于Has read method(s)

204

如果f_mode按位与le is open for writing 且此条件成立可能性大(为编译器优化)(write || write_iter)则f_mode或等于Has write method(s)

207

f_mode或等于FMODE_OPENED

208

f_op等于fop

209

如果f_mode按位与le is open for reading 按位或le is open for writing 的值的值恒等于le is open for reading 则i_readcount_inc( Where the name belongs to - NULL is * negative )

211

返回:file

**调用者**
名称	描述
alloc_file_pseudo
alloc_file_clone

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告