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	#define _BLOCK_IF_H_			#define _BLOCK_IF_H_

	#include <sys/uio.h>			#include <sys/uio.h>
	#include <sys/unistd.h>			#include <sys/unistd.h>

	#define BLOCKIF_IOV_MAX 33 /* not practical to be IOV_MAX */			#define BLOCKIF_IOV_MAX 33 /* not practical to be IOV_MAX */

	struct blockif_req {			struct blockif_req {
	struct iovec br_iov[BLOCKIF_IOV_MAX];
	int br_iovcnt;			int br_iovcnt;
	off_t br_offset;			off_t br_offset;
	ssize_t br_resid;			ssize_t br_resid;
	void (br_callback)(struct blockif_req req, int err);			void (br_callback)(struct blockif_req req, int err);
	void *br_param;			void *br_param;
				struct iovec br_iov[BLOCKIF_IOV_MAX];
	};			};

	struct blockif_ctxt;			struct blockif_ctxt;
	struct blockif_ctxt blockif_open(const char optstr, const char *ident);			struct blockif_ctxt blockif_open(const char optstr, const char *ident);
	off_t blockif_size(struct blockif_ctxt *bc);			off_t blockif_size(struct blockif_ctxt *bc);
	void blockif_chs(struct blockif_ctxt bc, uint16_t c, uint8_t *h,			void blockif_chs(struct blockif_ctxt bc, uint16_t c, uint8_t *h,
	uint8_t *s);			uint8_t *s);
	int blockif_sectsz(struct blockif_ctxt *bc);			int blockif_sectsz(struct blockif_ctxt *bc);
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