blob_bdev.h File Reference

Helper library to use spdk_bdev as the backing device for a blobstore. More...

Data Structures
struct	spdk_bdev_bs_dev_opts

Functions
	SPDK_STATIC_ASSERT (sizeof(struct spdk_bdev_bs_dev_opts)==8, "Incorrect size")
int	spdk_bdev_create_bs_dev_ext (const char *bdev_name, spdk_bdev_event_cb_t event_cb, void *event_ctx, struct spdk_bs_dev **bs_dev)
	Create a blobstore block device from a bdev. More...
int	spdk_bdev_create_bs_dev (const char *bdev_name, bool write, struct spdk_bdev_bs_dev_opts *opts, size_t opts_size, spdk_bdev_event_cb_t event_cb, void *event_ctx, struct spdk_bs_dev **bs_dev)
	Create a blobstore block device from a bdev. More...
void	spdk_bdev_update_bs_blockcnt (struct spdk_bs_dev *bs_dev)
	Updates number of blocks of a blobstore block device. More...
int	spdk_bs_bdev_claim (struct spdk_bs_dev *bs_dev, struct spdk_bdev_module *module)
	Claim the bdev module for the given blobstore. More...

Detailed Description

Helper library to use spdk_bdev as the backing device for a blobstore.

Function Documentation

spdk_bdev_create_bs_dev()

int spdk_bdev_create_bs_dev	(	const char *	bdev_name,
		bool	write,
		struct spdk_bdev_bs_dev_opts *	opts,
		size_t	opts_size,
		spdk_bdev_event_cb_t	event_cb,
		void *	event_ctx,
		struct spdk_bs_dev **	bs_dev
	)

Create a blobstore block device from a bdev.

Parameters

bdev_name	The bdev to use.
write	If true, open device read-write, else open read-only.
opts	Additonal options; none currently supported.
opts_size	Size of structure referenced by opts.
event_cb	Called when the bdev triggers asynchronous event.
event_ctx	Argument passed to function event_cb.
bs_dev	Output parameter for a pointer to the blobstore block device.

Returns

0 if operation is successful, or suitable errno value otherwise.

spdk_bdev_create_bs_dev_ext()

int spdk_bdev_create_bs_dev_ext	(	const char *	bdev_name,
		spdk_bdev_event_cb_t	event_cb,
		void *	event_ctx,
		struct spdk_bs_dev **	bs_dev
	)

Create a blobstore block device from a bdev.

Parameters

bdev_name	Name of the bdev to use.
event_cb	Called when the bdev triggers asynchronous event.
event_ctx	Argument passed to function event_cb.
bs_dev	Output parameter for a pointer to the blobstore block device.

Returns

0 if operation is successful, or suitable errno value otherwise.

spdk_bdev_update_bs_blockcnt()

void spdk_bdev_update_bs_blockcnt

(

struct spdk_bs_dev *

bs_dev

)

Updates number of blocks of a blobstore block device.

Parameters

bs_dev

Blobstore block device.

spdk_bs_bdev_claim()

int spdk_bs_bdev_claim	(	struct spdk_bs_dev *	bs_dev,
		struct spdk_bdev_module *	module
	)

Claim the bdev module for the given blobstore.

If bs_dev was opened read-write using spdk_bdev_create_bs_dev_ext(), a read-write-once claim is taken. If bs_dev was opened read-only using spdk_bdev_create_bs_dev(), a read-only-many claim is taken.

Parameters

bs_dev	Blobstore block device.
module	Bdev module to claim.

Returns

0 on success, negative errno on failure.