Commit 33b12a44 authored by Konrad Sztyber's avatar Konrad Sztyber Committed by Tomasz Zawadzki
Browse files

util: add spdk_iovmove() 



It's the same as spdk_iovcpy(), but the dst/src buffers can overlap.

Signed-off-by: default avatarKonrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I6daa0a846d7d1deac2c01d1a1be09171fa8bf796
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15747


Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarAleksey Marchuk <alexeymar@nvidia.com>
parent 940be803

include/spdk/util.h

+7 −0
Original line number Diff line number Diff line
@@ -108,6 +108,13 @@ spdk_divide_round_up(uint64_t num, uint64_t divisor) 
 */

size_t spdk_iovcpy(struct iovec *siov, size_t siovcnt, struct iovec *diov, size_t diovcnt);



/**

 * Same as spdk_iovcpy(), but the src/dst buffers might overlap.

 *

 * \return The number of bytes copied.

 */

size_t spdk_iovmove(struct iovec *siov, size_t siovcnt, struct iovec *diov, size_t diovcnt);



/**

 * An iovec iterator. Can be allocated on the stack.

 */

lib/util/iov.c

+18 −0
Original line number Diff line number Diff line
@@ -104,6 +104,24 @@ spdk_iovcpy(struct iovec *siov, size_t siovcnt, struct iovec *diov, size_t diovc 
	return total_sz;

}



size_t

spdk_iovmove(struct iovec *siov, size_t siovcnt, struct iovec *diov, size_t diovcnt)

{

	struct spdk_ioviter iter;

	size_t len, total_sz;

	void *src, *dst;



	total_sz = 0;

	for (len = spdk_ioviter_first(&iter, siov, siovcnt, diov, diovcnt, &src, &dst);

	     len != 0;

	     len = spdk_ioviter_next(&iter, &src, &dst)) {

		memmove(dst, src, len);

		total_sz += len;

	}



	return total_sz;

}



void

spdk_copy_iovs_to_buf(void *buf, size_t buf_len, struct iovec *iovs, int iovcnt)

{

lib/util/spdk_util.map

+1 −0
Original line number Diff line number Diff line
@@ -131,6 +131,7 @@ 
	spdk_u32log2;

	spdk_u64log2;

	spdk_iovcpy;

	spdk_iovmove;

	spdk_ioviter_first;

	spdk_ioviter_next;

	spdk_copy_iovs_to_buf;