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| author | Christoph Hellwig <hch@lst.de> | 2018-05-22 11:10:02 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-06-01 14:37:35 +0200 |
| commit | c7759fff22657d0e03b508f8f3ef97efbb10bc13 (patch) | |
| tree | 7b1c0135a8b5aa4fe1837a20bef91a7b95925f33 /drivers/nvme | |
| parent | aafd3afe9d2e731f50477cd1b4db7efa86d2637a (diff) | |
| download | linux-stable-c7759fff22657d0e03b508f8f3ef97efbb10bc13.tar.gz linux-stable-c7759fff22657d0e03b508f8f3ef97efbb10bc13.tar.bz2 linux-stable-c7759fff22657d0e03b508f8f3ef97efbb10bc13.zip | |
nvmet: add a new nvmet_zero_sgl helper
Zeroes the SGL in the payload.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/core.c | 7 | ||||
| -rw-r--r-- | drivers/nvme/target/nvmet.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 800aaf96ddcd..55c4bc693aa2 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -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; diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 32ebffcf464c..768abe203298 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -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); |