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Thu, 10 Oct 2024 08:40:11 -0400 (EDT) From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= To: kbusch@kernel.org, hch@lst.de, dlemoal@kernel.org, cassel@kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, wangyugui@e16-tech.com, martin.petersen@oracle.com, hare@suse.de Subject: [PATCH 3/3 v2] nvmet: add rotational support Date: Thu, 10 Oct 2024 14:39:51 +0200 Message-ID: <20241010123951.1226105-4-m@bjorling.me> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20241010123951.1226105-1-m@bjorling.me> References: <20241010123951.1226105-1-m@bjorling.me> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Keith Busch Rotational block devices can be detected in NVMe through the rotational attribute in the independent namespace identify data structure. Extend nvmet with support for the independent namespace identify data structure and expose the rotational support of the backend device. Signed-off-by: Keith Busch --- drivers/nvme/target/admin-cmd.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cm= d.c index f7e1156ac7ec..f08f1226c897 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -675,6 +675,35 @@ static void nvmet_execute_identify_ctrl_nvm(struct nvm= et_req *req) nvmet_zero_sgl(req, 0, sizeof(struct nvme_id_ctrl_nvm))); } =20 +static void nvmet_execute_id_cs_indep(struct nvmet_req *req) +{ + struct nvme_id_ns_cs_indep *id; + u16 status; + + status =3D nvmet_req_find_ns(req); + if (status) + goto out; + + id =3D kzalloc(sizeof(*id), GFP_KERNEL); + if (!id) { + status =3D NVME_SC_INTERNAL; + goto out; + } + + id->nstat =3D NVME_NSTAT_NRDY; + id->anagrpid =3D req->ns->anagrpid; + id->nmic =3D NVME_NS_NMIC_SHARED; + if (req->ns->readonly) + id->nsattr |=3D NVME_NS_ATTR_RO; + if (req->ns->bdev && !bdev_nonrot(req->ns->bdev)) + id->nsfeat |=3D NVME_NS_ROTATIONAL; + + status =3D nvmet_copy_to_sgl(req, 0, id, sizeof(*id)); + kfree(id); +out: + nvmet_req_complete(req, status); +} + static void nvmet_execute_identify(struct nvmet_req *req) { if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE)) @@ -719,6 +748,9 @@ static void nvmet_execute_identify(struct nvmet_req *re= q) break; } break; + case NVME_ID_CNS_NS_CS_INDEP: + nvmet_execute_id_cs_indep(req); + return; } =20 pr_debug("unhandled identify cns %d on qid %d\n", --=20 2.46.0