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- // SPDX-License-Identifier: GPL-2.0
- /*
- * NVMe admin command implementation.
- * Copyright (c) 2015-2016 HGST, a Western Digital Company.
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- #include <linux/module.h>
- #include <linux/rculist.h>
- #include <linux/part_stat.h>
- #include <generated/utsrelease.h>
- #include <asm/unaligned.h>
- #include "nvmet.h"
- u32 nvmet_get_log_page_len(struct nvme_command *cmd)
- {
- u32 len = le16_to_cpu(cmd->get_log_page.numdu);
- len <<= 16;
- len += le16_to_cpu(cmd->get_log_page.numdl);
- /* NUMD is a 0's based value */
- len += 1;
- len *= sizeof(u32);
- return len;
- }
- static u32 nvmet_feat_data_len(struct nvmet_req *req, u32 cdw10)
- {
- switch (cdw10 & 0xff) {
- case NVME_FEAT_HOST_ID:
- return sizeof(req->sq->ctrl->hostid);
- default:
- return 0;
- }
- }
- u64 nvmet_get_log_page_offset(struct nvme_command *cmd)
- {
- return le64_to_cpu(cmd->get_log_page.lpo);
- }
- static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
- {
- nvmet_req_complete(req, nvmet_zero_sgl(req, 0, req->transfer_len));
- }
- static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- unsigned long flags;
- off_t offset = 0;
- u64 slot;
- u64 i;
- spin_lock_irqsave(&ctrl->error_lock, flags);
- slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS;
- for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) {
- if (nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot],
- sizeof(struct nvme_error_slot)))
- break;
- if (slot == 0)
- slot = NVMET_ERROR_LOG_SLOTS - 1;
- else
- slot--;
- offset += sizeof(struct nvme_error_slot);
- }
- spin_unlock_irqrestore(&ctrl->error_lock, flags);
- nvmet_req_complete(req, 0);
- }
- static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,
- struct nvme_smart_log *slog)
- {
- struct nvmet_ns *ns;
- u64 host_reads, host_writes, data_units_read, data_units_written;
- ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->get_log_page.nsid);
- if (!ns) {
- pr_err("Could not find namespace id : %d\n",
- le32_to_cpu(req->cmd->get_log_page.nsid));
- req->error_loc = offsetof(struct nvme_rw_command, nsid);
- return NVME_SC_INVALID_NS;
- }
- /* we don't have the right data for file backed ns */
- if (!ns->bdev)
- goto out;
- host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]);
- data_units_read = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part,
- sectors[READ]), 1000);
- host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]);
- data_units_written = DIV_ROUND_UP(part_stat_read(ns->bdev->bd_part,
- sectors[WRITE]), 1000);
- put_unaligned_le64(host_reads, &slog->host_reads[0]);
- put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
- put_unaligned_le64(host_writes, &slog->host_writes[0]);
- put_unaligned_le64(data_units_written, &slog->data_units_written[0]);
- out:
- nvmet_put_namespace(ns);
- return NVME_SC_SUCCESS;
- }
- static u16 nvmet_get_smart_log_all(struct nvmet_req *req,
- struct nvme_smart_log *slog)
- {
- u64 host_reads = 0, host_writes = 0;
- u64 data_units_read = 0, data_units_written = 0;
- struct nvmet_ns *ns;
- struct nvmet_ctrl *ctrl;
- unsigned long idx;
- ctrl = req->sq->ctrl;
- xa_for_each(&ctrl->subsys->namespaces, idx, ns) {
- /* we don't have the right data for file backed ns */
- if (!ns->bdev)
- continue;
- host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]);
- data_units_read += DIV_ROUND_UP(
- part_stat_read(ns->bdev->bd_part, sectors[READ]), 1000);
- host_writes += part_stat_read(ns->bdev->bd_part, ios[WRITE]);
- data_units_written += DIV_ROUND_UP(
- part_stat_read(ns->bdev->bd_part, sectors[WRITE]), 1000);
- }
- put_unaligned_le64(host_reads, &slog->host_reads[0]);
- put_unaligned_le64(data_units_read, &slog->data_units_read[0]);
- put_unaligned_le64(host_writes, &slog->host_writes[0]);
- put_unaligned_le64(data_units_written, &slog->data_units_written[0]);
- return NVME_SC_SUCCESS;
- }
- static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
- {
- struct nvme_smart_log *log;
- u16 status = NVME_SC_INTERNAL;
- unsigned long flags;
- if (req->transfer_len != sizeof(*log))
- goto out;
- log = kzalloc(sizeof(*log), GFP_KERNEL);
- if (!log)
- goto out;
- if (req->cmd->get_log_page.nsid == cpu_to_le32(NVME_NSID_ALL))
- status = nvmet_get_smart_log_all(req, log);
- else
- status = nvmet_get_smart_log_nsid(req, log);
- if (status)
- goto out_free_log;
- spin_lock_irqsave(&req->sq->ctrl->error_lock, flags);
- put_unaligned_le64(req->sq->ctrl->err_counter,
- &log->num_err_log_entries);
- spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags);
- status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
- out_free_log:
- kfree(log);
- out:
- nvmet_req_complete(req, status);
- }
- static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req)
- {
- u16 status = NVME_SC_INTERNAL;
- struct nvme_effects_log *log;
- log = kzalloc(sizeof(*log), GFP_KERNEL);
- if (!log)
- goto out;
- log->acs[nvme_admin_get_log_page] = cpu_to_le32(1 << 0);
- log->acs[nvme_admin_identify] = cpu_to_le32(1 << 0);
- log->acs[nvme_admin_abort_cmd] = cpu_to_le32(1 << 0);
- log->acs[nvme_admin_set_features] = cpu_to_le32(1 << 0);
- log->acs[nvme_admin_get_features] = cpu_to_le32(1 << 0);
- log->acs[nvme_admin_async_event] = cpu_to_le32(1 << 0);
- log->acs[nvme_admin_keep_alive] = cpu_to_le32(1 << 0);
- log->iocs[nvme_cmd_read] = cpu_to_le32(1 << 0);
- log->iocs[nvme_cmd_write] = cpu_to_le32(1 << 0);
- log->iocs[nvme_cmd_flush] = cpu_to_le32(1 << 0);
- log->iocs[nvme_cmd_dsm] = cpu_to_le32(1 << 0);
- log->iocs[nvme_cmd_write_zeroes] = cpu_to_le32(1 << 0);
- status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
- kfree(log);
- out:
- nvmet_req_complete(req, status);
- }
- static void nvmet_execute_get_log_changed_ns(struct nvmet_req *req)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- u16 status = NVME_SC_INTERNAL;
- size_t len;
- if (req->transfer_len != NVME_MAX_CHANGED_NAMESPACES * sizeof(__le32))
- goto out;
- mutex_lock(&ctrl->lock);
- if (ctrl->nr_changed_ns == U32_MAX)
- len = sizeof(__le32);
- else
- len = ctrl->nr_changed_ns * sizeof(__le32);
- status = nvmet_copy_to_sgl(req, 0, ctrl->changed_ns_list, len);
- if (!status)
- status = nvmet_zero_sgl(req, len, req->transfer_len - len);
- ctrl->nr_changed_ns = 0;
- nvmet_clear_aen_bit(req, NVME_AEN_BIT_NS_ATTR);
- mutex_unlock(&ctrl->lock);
- out:
- nvmet_req_complete(req, status);
- }
- static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid,
- struct nvme_ana_group_desc *desc)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- struct nvmet_ns *ns;
- unsigned long idx;
- u32 count = 0;
- if (!(req->cmd->get_log_page.lsp & NVME_ANA_LOG_RGO)) {
- xa_for_each(&ctrl->subsys->namespaces, idx, ns)
- if (ns->anagrpid == grpid)
- desc->nsids[count++] = cpu_to_le32(ns->nsid);
- }
- desc->grpid = cpu_to_le32(grpid);
- desc->nnsids = cpu_to_le32(count);
- desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt);
- desc->state = req->port->ana_state[grpid];
- memset(desc->rsvd17, 0, sizeof(desc->rsvd17));
- return sizeof(struct nvme_ana_group_desc) + count * sizeof(__le32);
- }
- static void nvmet_execute_get_log_page_ana(struct nvmet_req *req)
- {
- struct nvme_ana_rsp_hdr hdr = { 0, };
- struct nvme_ana_group_desc *desc;
- size_t offset = sizeof(struct nvme_ana_rsp_hdr); /* start beyond hdr */
- size_t len;
- u32 grpid;
- u16 ngrps = 0;
- u16 status;
- status = NVME_SC_INTERNAL;
- desc = kmalloc(sizeof(struct nvme_ana_group_desc) +
- NVMET_MAX_NAMESPACES * sizeof(__le32), GFP_KERNEL);
- if (!desc)
- goto out;
- down_read(&nvmet_ana_sem);
- for (grpid = 1; grpid <= NVMET_MAX_ANAGRPS; grpid++) {
- if (!nvmet_ana_group_enabled[grpid])
- continue;
- len = nvmet_format_ana_group(req, grpid, desc);
- status = nvmet_copy_to_sgl(req, offset, desc, len);
- if (status)
- break;
- offset += len;
- ngrps++;
- }
- for ( ; grpid <= NVMET_MAX_ANAGRPS; grpid++) {
- if (nvmet_ana_group_enabled[grpid])
- ngrps++;
- }
- hdr.chgcnt = cpu_to_le64(nvmet_ana_chgcnt);
- hdr.ngrps = cpu_to_le16(ngrps);
- nvmet_clear_aen_bit(req, NVME_AEN_BIT_ANA_CHANGE);
- up_read(&nvmet_ana_sem);
- kfree(desc);
- /* copy the header last once we know the number of groups */
- status = nvmet_copy_to_sgl(req, 0, &hdr, sizeof(hdr));
- out:
- nvmet_req_complete(req, status);
- }
- static void nvmet_execute_get_log_page(struct nvmet_req *req)
- {
- if (!nvmet_check_transfer_len(req, nvmet_get_log_page_len(req->cmd)))
- return;
- switch (req->cmd->get_log_page.lid) {
- case NVME_LOG_ERROR:
- return nvmet_execute_get_log_page_error(req);
- case NVME_LOG_SMART:
- return nvmet_execute_get_log_page_smart(req);
- case NVME_LOG_FW_SLOT:
- /*
- * We only support a single firmware slot which always is
- * active, so we can zero out the whole firmware slot log and
- * still claim to fully implement this mandatory log page.
- */
- return nvmet_execute_get_log_page_noop(req);
- case NVME_LOG_CHANGED_NS:
- return nvmet_execute_get_log_changed_ns(req);
- case NVME_LOG_CMD_EFFECTS:
- return nvmet_execute_get_log_cmd_effects_ns(req);
- case NVME_LOG_ANA:
- return nvmet_execute_get_log_page_ana(req);
- }
- pr_debug("unhandled lid %d on qid %d\n",
- req->cmd->get_log_page.lid, req->sq->qid);
- req->error_loc = offsetof(struct nvme_get_log_page_command, lid);
- nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR);
- }
- static void nvmet_id_set_model_number(struct nvme_id_ctrl *id,
- struct nvmet_subsys *subsys)
- {
- const char *model = NVMET_DEFAULT_CTRL_MODEL;
- struct nvmet_subsys_model *subsys_model;
- rcu_read_lock();
- subsys_model = rcu_dereference(subsys->model);
- if (subsys_model)
- model = subsys_model->number;
- memcpy_and_pad(id->mn, sizeof(id->mn), model, strlen(model), ' ');
- rcu_read_unlock();
- }
- static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- struct nvme_id_ctrl *id;
- u32 cmd_capsule_size;
- u16 status = 0;
- id = kzalloc(sizeof(*id), GFP_KERNEL);
- if (!id) {
- status = NVME_SC_INTERNAL;
- goto out;
- }
- /* XXX: figure out how to assign real vendors IDs. */
- id->vid = 0;
- id->ssvid = 0;
- memset(id->sn, ' ', sizeof(id->sn));
- bin2hex(id->sn, &ctrl->subsys->serial,
- min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
- nvmet_id_set_model_number(id, ctrl->subsys);
- memcpy_and_pad(id->fr, sizeof(id->fr),
- UTS_RELEASE, strlen(UTS_RELEASE), ' ');
- id->rab = 6;
- /*
- * XXX: figure out how we can assign a IEEE OUI, but until then
- * the safest is to leave it as zeroes.
- */
- /* we support multiple ports, multiples hosts and ANA: */
- id->cmic = (1 << 0) | (1 << 1) | (1 << 3);
- /* Limit MDTS according to transport capability */
- if (ctrl->ops->get_mdts)
- id->mdts = ctrl->ops->get_mdts(ctrl);
- else
- id->mdts = 0;
- id->cntlid = cpu_to_le16(ctrl->cntlid);
- id->ver = cpu_to_le32(ctrl->subsys->ver);
- /* XXX: figure out what to do about RTD3R/RTD3 */
- id->oaes = cpu_to_le32(NVMET_AEN_CFG_OPTIONAL);
- id->ctratt = cpu_to_le32(NVME_CTRL_ATTR_HID_128_BIT |
- NVME_CTRL_ATTR_TBKAS);
- id->oacs = 0;
- /*
- * We don't really have a practical limit on the number of abort
- * comands. But we don't do anything useful for abort either, so
- * no point in allowing more abort commands than the spec requires.
- */
- id->acl = 3;
- id->aerl = NVMET_ASYNC_EVENTS - 1;
- /* first slot is read-only, only one slot supported */
- id->frmw = (1 << 0) | (1 << 1);
- id->lpa = (1 << 0) | (1 << 1) | (1 << 2);
- id->elpe = NVMET_ERROR_LOG_SLOTS - 1;
- id->npss = 0;
- /* We support keep-alive timeout in granularity of seconds */
- id->kas = cpu_to_le16(NVMET_KAS);
- id->sqes = (0x6 << 4) | 0x6;
- id->cqes = (0x4 << 4) | 0x4;
- /* no enforcement soft-limit for maxcmd - pick arbitrary high value */
- id->maxcmd = cpu_to_le16(NVMET_MAX_CMD);
- id->nn = cpu_to_le32(ctrl->subsys->max_nsid);
- id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES);
- id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM |
- NVME_CTRL_ONCS_WRITE_ZEROES);
- /* XXX: don't report vwc if the underlying device is write through */
- id->vwc = NVME_CTRL_VWC_PRESENT;
- /*
- * We can't support atomic writes bigger than a LBA without support
- * from the backend device.
- */
- id->awun = 0;
- id->awupf = 0;
- id->sgls = cpu_to_le32(1 << 0); /* we always support SGLs */
- if (ctrl->ops->flags & NVMF_KEYED_SGLS)
- id->sgls |= cpu_to_le32(1 << 2);
- if (req->port->inline_data_size)
- id->sgls |= cpu_to_le32(1 << 20);
- strlcpy(id->subnqn, ctrl->subsys->subsysnqn, sizeof(id->subnqn));
- /*
- * Max command capsule size is sqe + in-capsule data size.
- * Disable in-capsule data for Metadata capable controllers.
- */
- cmd_capsule_size = sizeof(struct nvme_command);
- if (!ctrl->pi_support)
- cmd_capsule_size += req->port->inline_data_size;
- id->ioccsz = cpu_to_le32(cmd_capsule_size / 16);
- /* Max response capsule size is cqe */
- id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16);
- id->msdbd = ctrl->ops->msdbd;
- id->anacap = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4);
- id->anatt = 10; /* random value */
- id->anagrpmax = cpu_to_le32(NVMET_MAX_ANAGRPS);
- id->nanagrpid = cpu_to_le32(NVMET_MAX_ANAGRPS);
- /*
- * Meh, we don't really support any power state. Fake up the same
- * values that qemu does.
- */
- id->psd[0].max_power = cpu_to_le16(0x9c4);
- id->psd[0].entry_lat = cpu_to_le32(0x10);
- id->psd[0].exit_lat = cpu_to_le32(0x4);
- id->nwpc = 1 << 0; /* write protect and no write protect */
- status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
- kfree(id);
- out:
- nvmet_req_complete(req, status);
- }
- static void nvmet_execute_identify_ns(struct nvmet_req *req)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- struct nvme_id_ns *id;
- u16 status = 0;
- if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
- req->error_loc = offsetof(struct nvme_identify, nsid);
- status = NVME_SC_INVALID_NS | NVME_SC_DNR;
- goto out;
- }
- id = kzalloc(sizeof(*id), GFP_KERNEL);
- if (!id) {
- status = NVME_SC_INTERNAL;
- goto out;
- }
- /* return an all zeroed buffer if we can't find an active namespace */
- req->ns = nvmet_find_namespace(ctrl, req->cmd->identify.nsid);
- if (!req->ns) {
- status = 0;
- goto done;
- }
- nvmet_ns_revalidate(req->ns);
- /*
- * nuse = ncap = nsze isn't always true, but we have no way to find
- * that out from the underlying device.
- */
- id->ncap = id->nsze =
- cpu_to_le64(req->ns->size >> req->ns->blksize_shift);
- switch (req->port->ana_state[req->ns->anagrpid]) {
- case NVME_ANA_INACCESSIBLE:
- case NVME_ANA_PERSISTENT_LOSS:
- break;
- default:
- id->nuse = id->nsze;
- break;
- }
- if (req->ns->bdev)
- nvmet_bdev_set_limits(req->ns->bdev, id);
- /*
- * We just provide a single LBA format that matches what the
- * underlying device reports.
- */
- id->nlbaf = 0;
- id->flbas = 0;
- /*
- * Our namespace might always be shared. Not just with other
- * controllers, but also with any other user of the block device.
- */
- id->nmic = (1 << 0);
- id->anagrpid = cpu_to_le32(req->ns->anagrpid);
- memcpy(&id->nguid, &req->ns->nguid, sizeof(id->nguid));
- id->lbaf[0].ds = req->ns->blksize_shift;
- if (ctrl->pi_support && nvmet_ns_has_pi(req->ns)) {
- id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST |
- NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 |
- NVME_NS_DPC_PI_TYPE3;
- id->mc = NVME_MC_EXTENDED_LBA;
- id->dps = req->ns->pi_type;
- id->flbas = NVME_NS_FLBAS_META_EXT;
- id->lbaf[0].ms = cpu_to_le16(req->ns->metadata_size);
- }
- if (req->ns->readonly)
- id->nsattr |= (1 << 0);
- done:
- if (!status)
- status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
- kfree(id);
- out:
- nvmet_req_complete(req, status);
- }
- static void nvmet_execute_identify_nslist(struct nvmet_req *req)
- {
- static const int buf_size = NVME_IDENTIFY_DATA_SIZE;
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- struct nvmet_ns *ns;
- unsigned long idx;
- u32 min_nsid = le32_to_cpu(req->cmd->identify.nsid);
- __le32 *list;
- u16 status = 0;
- int i = 0;
- list = kzalloc(buf_size, GFP_KERNEL);
- if (!list) {
- status = NVME_SC_INTERNAL;
- goto out;
- }
- xa_for_each(&ctrl->subsys->namespaces, idx, ns) {
- if (ns->nsid <= min_nsid)
- continue;
- list[i++] = cpu_to_le32(ns->nsid);
- if (i == buf_size / sizeof(__le32))
- break;
- }
- status = nvmet_copy_to_sgl(req, 0, list, buf_size);
- kfree(list);
- out:
- nvmet_req_complete(req, status);
- }
- static u16 nvmet_copy_ns_identifier(struct nvmet_req *req, u8 type, u8 len,
- void *id, off_t *off)
- {
- struct nvme_ns_id_desc desc = {
- .nidt = type,
- .nidl = len,
- };
- u16 status;
- status = nvmet_copy_to_sgl(req, *off, &desc, sizeof(desc));
- if (status)
- return status;
- *off += sizeof(desc);
- status = nvmet_copy_to_sgl(req, *off, id, len);
- if (status)
- return status;
- *off += len;
- return 0;
- }
- static void nvmet_execute_identify_desclist(struct nvmet_req *req)
- {
- struct nvmet_ns *ns;
- u16 status = 0;
- off_t off = 0;
- ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
- if (!ns) {
- req->error_loc = offsetof(struct nvme_identify, nsid);
- status = NVME_SC_INVALID_NS | NVME_SC_DNR;
- goto out;
- }
- if (memchr_inv(&ns->uuid, 0, sizeof(ns->uuid))) {
- status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID,
- NVME_NIDT_UUID_LEN,
- &ns->uuid, &off);
- if (status)
- goto out_put_ns;
- }
- if (memchr_inv(ns->nguid, 0, sizeof(ns->nguid))) {
- status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID,
- NVME_NIDT_NGUID_LEN,
- &ns->nguid, &off);
- if (status)
- goto out_put_ns;
- }
- if (sg_zero_buffer(req->sg, req->sg_cnt, NVME_IDENTIFY_DATA_SIZE - off,
- off) != NVME_IDENTIFY_DATA_SIZE - off)
- status = NVME_SC_INTERNAL | NVME_SC_DNR;
- out_put_ns:
- nvmet_put_namespace(ns);
- 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))
- return;
- switch (req->cmd->identify.cns) {
- case NVME_ID_CNS_NS:
- return nvmet_execute_identify_ns(req);
- case NVME_ID_CNS_CTRL:
- return nvmet_execute_identify_ctrl(req);
- case NVME_ID_CNS_NS_ACTIVE_LIST:
- return nvmet_execute_identify_nslist(req);
- case NVME_ID_CNS_NS_DESC_LIST:
- return nvmet_execute_identify_desclist(req);
- }
- pr_debug("unhandled identify cns %d on qid %d\n",
- req->cmd->identify.cns, req->sq->qid);
- req->error_loc = offsetof(struct nvme_identify, cns);
- nvmet_req_complete(req, NVME_SC_INVALID_FIELD | NVME_SC_DNR);
- }
- /*
- * A "minimum viable" abort implementation: the command is mandatory in the
- * spec, but we are not required to do any useful work. We couldn't really
- * do a useful abort, so don't bother even with waiting for the command
- * to be exectuted and return immediately telling the command to abort
- * wasn't found.
- */
- static void nvmet_execute_abort(struct nvmet_req *req)
- {
- if (!nvmet_check_transfer_len(req, 0))
- return;
- nvmet_set_result(req, 1);
- nvmet_req_complete(req, 0);
- }
- static u16 nvmet_write_protect_flush_sync(struct nvmet_req *req)
- {
- u16 status;
- if (req->ns->file)
- status = nvmet_file_flush(req);
- else
- status = nvmet_bdev_flush(req);
- if (status)
- pr_err("write protect flush failed nsid: %u\n", req->ns->nsid);
- return status;
- }
- static u16 nvmet_set_feat_write_protect(struct nvmet_req *req)
- {
- u32 write_protect = le32_to_cpu(req->cmd->common.cdw11);
- struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
- u16 status = NVME_SC_FEATURE_NOT_CHANGEABLE;
- req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->rw.nsid);
- if (unlikely(!req->ns)) {
- req->error_loc = offsetof(struct nvme_common_command, nsid);
- return status;
- }
- mutex_lock(&subsys->lock);
- switch (write_protect) {
- case NVME_NS_WRITE_PROTECT:
- req->ns->readonly = true;
- status = nvmet_write_protect_flush_sync(req);
- if (status)
- req->ns->readonly = false;
- break;
- case NVME_NS_NO_WRITE_PROTECT:
- req->ns->readonly = false;
- status = 0;
- break;
- default:
- break;
- }
- if (!status)
- nvmet_ns_changed(subsys, req->ns->nsid);
- mutex_unlock(&subsys->lock);
- return status;
- }
- u16 nvmet_set_feat_kato(struct nvmet_req *req)
- {
- u32 val32 = le32_to_cpu(req->cmd->common.cdw11);
- nvmet_stop_keep_alive_timer(req->sq->ctrl);
- req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000);
- nvmet_start_keep_alive_timer(req->sq->ctrl);
- nvmet_set_result(req, req->sq->ctrl->kato);
- return 0;
- }
- u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask)
- {
- u32 val32 = le32_to_cpu(req->cmd->common.cdw11);
- if (val32 & ~mask) {
- req->error_loc = offsetof(struct nvme_common_command, cdw11);
- return NVME_SC_INVALID_FIELD | NVME_SC_DNR;
- }
- WRITE_ONCE(req->sq->ctrl->aen_enabled, val32);
- nvmet_set_result(req, val32);
- return 0;
- }
- void nvmet_execute_set_features(struct nvmet_req *req)
- {
- struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
- u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
- u32 cdw11 = le32_to_cpu(req->cmd->common.cdw11);
- u16 status = 0;
- u16 nsqr;
- u16 ncqr;
- if (!nvmet_check_transfer_len(req, 0))
- return;
- switch (cdw10 & 0xff) {
- case NVME_FEAT_NUM_QUEUES:
- ncqr = (cdw11 >> 16) & 0xffff;
- nsqr = cdw11 & 0xffff;
- if (ncqr == 0xffff || nsqr == 0xffff) {
- status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
- break;
- }
- nvmet_set_result(req,
- (subsys->max_qid - 1) | ((subsys->max_qid - 1) << 16));
- break;
- case NVME_FEAT_KATO:
- status = nvmet_set_feat_kato(req);
- break;
- case NVME_FEAT_ASYNC_EVENT:
- status = nvmet_set_feat_async_event(req, NVMET_AEN_CFG_ALL);
- break;
- case NVME_FEAT_HOST_ID:
- status = NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
- break;
- case NVME_FEAT_WRITE_PROTECT:
- status = nvmet_set_feat_write_protect(req);
- break;
- default:
- req->error_loc = offsetof(struct nvme_common_command, cdw10);
- status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
- break;
- }
- nvmet_req_complete(req, status);
- }
- static u16 nvmet_get_feat_write_protect(struct nvmet_req *req)
- {
- struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
- u32 result;
- req->ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->common.nsid);
- if (!req->ns) {
- req->error_loc = offsetof(struct nvme_common_command, nsid);
- return NVME_SC_INVALID_NS | NVME_SC_DNR;
- }
- mutex_lock(&subsys->lock);
- if (req->ns->readonly == true)
- result = NVME_NS_WRITE_PROTECT;
- else
- result = NVME_NS_NO_WRITE_PROTECT;
- nvmet_set_result(req, result);
- mutex_unlock(&subsys->lock);
- return 0;
- }
- void nvmet_get_feat_kato(struct nvmet_req *req)
- {
- nvmet_set_result(req, req->sq->ctrl->kato * 1000);
- }
- void nvmet_get_feat_async_event(struct nvmet_req *req)
- {
- nvmet_set_result(req, READ_ONCE(req->sq->ctrl->aen_enabled));
- }
- void nvmet_execute_get_features(struct nvmet_req *req)
- {
- struct nvmet_subsys *subsys = req->sq->ctrl->subsys;
- u32 cdw10 = le32_to_cpu(req->cmd->common.cdw10);
- u16 status = 0;
- if (!nvmet_check_transfer_len(req, nvmet_feat_data_len(req, cdw10)))
- return;
- switch (cdw10 & 0xff) {
- /*
- * These features are mandatory in the spec, but we don't
- * have a useful way to implement them. We'll eventually
- * need to come up with some fake values for these.
- */
- #if 0
- case NVME_FEAT_ARBITRATION:
- break;
- case NVME_FEAT_POWER_MGMT:
- break;
- case NVME_FEAT_TEMP_THRESH:
- break;
- case NVME_FEAT_ERR_RECOVERY:
- break;
- case NVME_FEAT_IRQ_COALESCE:
- break;
- case NVME_FEAT_IRQ_CONFIG:
- break;
- case NVME_FEAT_WRITE_ATOMIC:
- break;
- #endif
- case NVME_FEAT_ASYNC_EVENT:
- nvmet_get_feat_async_event(req);
- break;
- case NVME_FEAT_VOLATILE_WC:
- nvmet_set_result(req, 1);
- break;
- case NVME_FEAT_NUM_QUEUES:
- nvmet_set_result(req,
- (subsys->max_qid-1) | ((subsys->max_qid-1) << 16));
- break;
- case NVME_FEAT_KATO:
- nvmet_get_feat_kato(req);
- break;
- case NVME_FEAT_HOST_ID:
- /* need 128-bit host identifier flag */
- if (!(req->cmd->common.cdw11 & cpu_to_le32(1 << 0))) {
- req->error_loc =
- offsetof(struct nvme_common_command, cdw11);
- status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
- break;
- }
- status = nvmet_copy_to_sgl(req, 0, &req->sq->ctrl->hostid,
- sizeof(req->sq->ctrl->hostid));
- break;
- case NVME_FEAT_WRITE_PROTECT:
- status = nvmet_get_feat_write_protect(req);
- break;
- default:
- req->error_loc =
- offsetof(struct nvme_common_command, cdw10);
- status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
- break;
- }
- nvmet_req_complete(req, status);
- }
- void nvmet_execute_async_event(struct nvmet_req *req)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- if (!nvmet_check_transfer_len(req, 0))
- return;
- mutex_lock(&ctrl->lock);
- if (ctrl->nr_async_event_cmds >= NVMET_ASYNC_EVENTS) {
- mutex_unlock(&ctrl->lock);
- nvmet_req_complete(req, NVME_SC_ASYNC_LIMIT | NVME_SC_DNR);
- return;
- }
- ctrl->async_event_cmds[ctrl->nr_async_event_cmds++] = req;
- mutex_unlock(&ctrl->lock);
- schedule_work(&ctrl->async_event_work);
- }
- void nvmet_execute_keep_alive(struct nvmet_req *req)
- {
- struct nvmet_ctrl *ctrl = req->sq->ctrl;
- if (!nvmet_check_transfer_len(req, 0))
- return;
- pr_debug("ctrl %d update keep-alive timer for %d secs\n",
- ctrl->cntlid, ctrl->kato);
- mod_delayed_work(system_wq, &ctrl->ka_work, ctrl->kato * HZ);
- nvmet_req_complete(req, 0);
- }
- u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
- {
- struct nvme_command *cmd = req->cmd;
- u16 ret;
- if (nvme_is_fabrics(cmd))
- return nvmet_parse_fabrics_cmd(req);
- if (req->sq->ctrl->subsys->type == NVME_NQN_DISC)
- return nvmet_parse_discovery_cmd(req);
- ret = nvmet_check_ctrl_status(req, cmd);
- if (unlikely(ret))
- return ret;
- if (nvmet_req_passthru_ctrl(req))
- return nvmet_parse_passthru_admin_cmd(req);
- switch (cmd->common.opcode) {
- case nvme_admin_get_log_page:
- req->execute = nvmet_execute_get_log_page;
- return 0;
- case nvme_admin_identify:
- req->execute = nvmet_execute_identify;
- return 0;
- case nvme_admin_abort_cmd:
- req->execute = nvmet_execute_abort;
- return 0;
- case nvme_admin_set_features:
- req->execute = nvmet_execute_set_features;
- return 0;
- case nvme_admin_get_features:
- req->execute = nvmet_execute_get_features;
- return 0;
- case nvme_admin_async_event:
- req->execute = nvmet_execute_async_event;
- return 0;
- case nvme_admin_keep_alive:
- req->execute = nvmet_execute_keep_alive;
- return 0;
- }
- pr_debug("unhandled cmd %d on qid %d\n", cmd->common.opcode,
- req->sq->qid);
- req->error_loc = offsetof(struct nvme_common_command, opcode);
- return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
- }
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