bdev_read_only

函数名称：bdev_read_only

函数原型：int bdev_read_only(struct block_device *bdev)

返回类型：int

参数：

类型	参数	名称
struct block_device *	bdev

1601

如果非bdev则返回:0

1603

返回:policy

**调用者**
名称	描述
__blkdev_issue_write_same	__blkdev_issue_write_same - generate number of bios with same page@bdev: target blockdev@sector: start sector@nr_sects: number of sectors to write@gfp_mask: memory allocation flags (for bio_alloc)@page: page containing data to write@biop: pointer to
__blkdev_issue_write_zeroes
__blkdev_issue_zero_pages
blkdev_ioctl	always keep this in sync with compat_blkdev_ioctl()
compat_blkdev_ioctl	Most of the generic ioctls are handled in the normal fallback path.This assumes the blkdev's low level compat_ioctl always returnsENOIOCTLCMD for unknown ioctls.
blkdev_zone_mgmt	lkdev_zone_mgmt - Execute a zone management operation on a range of zones@bdev: Target block device@op: Operation to be performed on the zones@sector: Start sector of the first zone to operate on@nr_sectors: Number of sectors, should be at least the
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().
blkdev_write_iter	Write data to the block device. Only intended for the block device itself* and the raw driver which basically is a fake block device.* Does not take i_mutex for the write and thus is not for general purpose* use.
check_pinning_enforcement	This must be called after early kernel init, since then the rootdev* is available.

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