lookup_bdev

函数名称：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.

函数原型：struct block_device *lookup_bdev(const char *pathname)

返回类型：struct block_device

参数：

类型	参数	名称
const char *	pathname

2190

如果非pathname或非pathname则返回:错误号

2193

error等于kern_path(pathname, llow links at the end , & path)

2194

如果error则返回:错误号

2197

inode等于d_backing_inode - Get upper or lower inode we should be using*@upper: The upper layer* This is the helper that should be used to get at the inode that will be used* if this dentry were to be opened as a file. The inode may be on the upper

2198

error等于负ENOTBLK

2199

如果非S_ISBLK(i_mode)则转到:fail

2201

error等于负EACCES

2202

如果非may_open_dev( & path)则转到:fail

2204

error等于负ENOMEM

2205

bdev等于bd_acquire(inode)

2206

如果非bdev则转到:fail

2208

out :

2209

path_put - put a reference to a path*@path: path to put the reference to* Given a path decrement the reference count to the dentry and the vfsmount.

2210

返回:bdev

2211

fail :

2212

bdev等于错误号

2213

转到:out

**调用者**
名称	描述
blkdev_get_by_path	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().
quotactl_block	look up a superblock on which quota ops will be performed* - use the name of a block device to find the superblock thereon

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