__mnt_want

函数名称：__mnt_want_write - get write access to a mount without freeze protection*@m: the mount on which to take a write* This tells the low-level filesystem that a write is about to be performed to* it, and makes sure that writes are allowed (mnt it read-write)

函数原型：int __mnt_want_write(struct vfsmount *m)

返回类型：int

参数：

类型	参数	名称
struct vfsmount *	m

313

mnt等于real_mount(m)

314

ret等于0

316

禁止抢占()

317

mnt_inc_writers(mnt)

323

smp_mb()

324

当READ_ONCE(mnt_flags)按位与MNT_WRITE_HOLD 循环

325

cpu_relax()

331

smp_rmb()

332

如果mnt_is_readonly(m)则

333

mnt_dec_writers(mnt)

334

ret等于负EROFS

336

禁用抢占和中断()

338

返回:ret

**调用者**
名称	描述
touch_atime
mnt_want_write	mnt_want_write - get write access to a mount@m: the mount on which to take a write This tells the low-level filesystem that a write is about to be performed to* it, and makes sure that writes are allowed (mount is read-write, filesystem
__mnt_want_write_file	__mnt_want_write_file - get write access to a file's mount@file: the file who's mount on which to take a write This is like __mnt_want_write, but it takes a file and can* do some optimisations if the file is open for write already
acct_on

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