mnt_want_write

函数名称：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

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

354

sb_start_write - get write access to a superblock*@sb: the super we write to* When a process wants to write data or metadata to a file system (i.e. dirty* a page or an inode), it should embed the operation in a sb_start_write() -

355

ret等于__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)

356

如果ret则超级块解除写访问

358

返回:ret

**调用者**
名称	描述
SYSCALL_DEFINE1
chmod_common
do_fchownat
do_last	Handle the last step of open()
do_tmpfile
filename_create
do_rmdir
do_unlinkat	Make sure that the actual truncation of the file will occur outside its* directory's i_mutex. Truncate can take a long time if there is a lot of* writeout happening, and we don't want to prevent access to the directory* while waiting on the I/O.
do_renameat2
path_setxattr
path_removexattr
utimes_common

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