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Commit c7759fff authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

nvmet: add a new nvmet_zero_sgl helper 



Zeroes the SGL in the payload.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
parent aafd3afe

drivers/nvme/target/core.c

+7 −0
Original line number Diff line number Diff line
@@ -57,6 +57,13 @@ u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf, size_t len) 
	return 0;

}



u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len)

{

	if (sg_zero_buffer(req->sg, req->sg_cnt, len, off) != len)

		return NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR;

	return 0;

}



static unsigned int nvmet_max_nsid(struct nvmet_subsys *subsys)

{

	struct nvmet_ns *ns;

drivers/nvme/target/nvmet.h

+1 −0
Original line number Diff line number Diff line
@@ -330,6 +330,7 @@ u16 nvmet_copy_to_sgl(struct nvmet_req *req, off_t off, const void *buf, 
		size_t len);

u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf,

		size_t len);

u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len);



u32 nvmet_get_log_page_len(struct nvme_command *cmd);