blkdev_get_by

函数名称：lkdev_get_by_path - open a block device by name*@path: path to the block device to open*@mode: FMODE_* mask*@holder: exclusive holder identifier* Open the blockdevice described by the device file at @path. @mode* and @holder are identical to blkdev_get().

函数原型：struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, void *holder)

返回类型：struct block_device

参数：

类型	参数	名称
const char *	path
fmode_t	mode
void *	holder

1791

bdev等于lookup_bdev - lookup a struct block_device by name*@pathname: special file representing the block device* Get a reference to the blockdevice at @pathname in the current* namespace if possible and return it. Return ERR_PTR(error)* otherwise.

1792

如果是错误则返回:bdev

1795

err等于lkdev_get - open a block device*@bdev: block_device to open*@mode: FMODE_* mask*@holder: exclusive holder identifier* Open @bdev with @mode. If @mode includes %FMODE_EXCL, @bdev is* open with exclusive access. Specifying %FMODE_EXCL with %NULL

1796

如果err则返回:错误号

1799

如果mode按位与le is open for writing 且bdev_read_only(bdev)则

1800

blkdev_put(bdev, mode)

1801

返回:错误号

1804

返回:bdev

**调用者**
名称	描述
mount_bdev

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