| // 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) |
| { |
| u64 host_reads, host_writes, data_units_read, data_units_written; |
| u16 status; |
| |
| status = nvmet_req_find_ns(req); |
| if (status) |
| return status; |
| |
| /* we don't have the right data for file backed ns */ |
| if (!req->ns->bdev) |
| return NVME_SC_SUCCESS; |
| |
| host_reads = part_stat_read(req->ns->bdev, ios[READ]); |
| data_units_read = |
| DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[READ]), 1000); |
| host_writes = part_stat_read(req->ns->bdev, ios[WRITE]); |
| data_units_written = |
| DIV_ROUND_UP(part_stat_read(req->ns->bdev, 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 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, ios[READ]); |
| data_units_read += DIV_ROUND_UP( |
| part_stat_read(ns->bdev, sectors[READ]), 1000); |
| host_writes += part_stat_read(ns->bdev, ios[WRITE]); |
| data_units_written += DIV_ROUND_UP( |
| part_stat_read(ns->bdev, 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_get_cmd_effects_nvm(struct nvme_effects_log *log) |
| { |
| log->acs[nvme_admin_get_log_page] = |
| log->acs[nvme_admin_identify] = |
| log->acs[nvme_admin_abort_cmd] = |
| log->acs[nvme_admin_set_features] = |
| log->acs[nvme_admin_get_features] = |
| log->acs[nvme_admin_async_event] = |
| log->acs[nvme_admin_keep_alive] = |
| cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); |
| |
| log->iocs[nvme_cmd_read] = |
| log->iocs[nvme_cmd_flush] = |
| log->iocs[nvme_cmd_dsm] = |
| cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); |
| log->iocs[nvme_cmd_write] = |
| log->iocs[nvme_cmd_write_zeroes] = |
| cpu_to_le32(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC); |
| } |
| |
| static void nvmet_get_cmd_effects_zns(struct nvme_effects_log *log) |
| { |
| log->iocs[nvme_cmd_zone_append] = |
| log->iocs[nvme_cmd_zone_mgmt_send] = |
| cpu_to_le32(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC); |
| log->iocs[nvme_cmd_zone_mgmt_recv] = |
| cpu_to_le32(NVME_CMD_EFFECTS_CSUPP); |
| } |
| |
| static void nvmet_execute_get_log_cmd_effects_ns(struct nvmet_req *req) |
| { |
| struct nvme_effects_log *log; |
| u16 status = NVME_SC_SUCCESS; |
| |
| log = kzalloc(sizeof(*log), GFP_KERNEL); |
| if (!log) { |
| status = NVME_SC_INTERNAL; |
| goto out; |
| } |
| |
| switch (req->cmd->get_log_page.csi) { |
| case NVME_CSI_NVM: |
| nvmet_get_cmd_effects_nvm(log); |
| break; |
| case NVME_CSI_ZNS: |
| if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
| status = NVME_SC_INVALID_IO_CMD_SET; |
| goto free; |
| } |
| nvmet_get_cmd_effects_nvm(log); |
| nvmet_get_cmd_effects_zns(log); |
| break; |
| default: |
| status = NVME_SC_INVALID_LOG_PAGE; |
| goto free; |
| } |
| |
| status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log)); |
| free: |
| 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 struct_size(desc, nsids, count); |
| } |
| |
| 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(struct_size(desc, nsids, NVMET_MAX_NAMESPACES), |
| 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_execute_identify_ctrl(struct nvmet_req *req) |
| { |
| struct nvmet_ctrl *ctrl = req->sq->ctrl; |
| struct nvmet_subsys *subsys = ctrl->subsys; |
| struct nvme_id_ctrl *id; |
| u32 cmd_capsule_size; |
| u16 status = 0; |
| |
| if (!subsys->subsys_discovered) { |
| mutex_lock(&subsys->lock); |
| subsys->subsys_discovered = true; |
| mutex_unlock(&subsys->lock); |
| } |
| |
| 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; |
| |
| memcpy(id->sn, ctrl->subsys->serial, NVMET_SN_MAX_SIZE); |
| memcpy_and_pad(id->mn, sizeof(id->mn), subsys->model_number, |
| strlen(subsys->model_number), ' '); |
| memcpy_and_pad(id->fr, sizeof(id->fr), |
| subsys->firmware_rev, strlen(subsys->firmware_rev), ' '); |
| |
| put_unaligned_le24(subsys->ieee_oui, id->ieee); |
| |
| id->rab = 6; |
| |
| if (nvmet_is_disc_subsys(ctrl->subsys)) |
| id->cntrltype = NVME_CTRL_DISC; |
| else |
| id->cntrltype = NVME_CTRL_IO; |
| |
| /* we support multiple ports, multiples hosts and ANA: */ |
| id->cmic = NVME_CTRL_CMIC_MULTI_PORT | NVME_CTRL_CMIC_MULTI_CTRL | |
| NVME_CTRL_CMIC_ANA; |
| |
| /* 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(NVMET_MAX_NAMESPACES); |
| 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); |
| |
| strscpy(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 nvme_id_ns *id; |
| u16 status; |
| |
| 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 */ |
| status = nvmet_req_find_ns(req); |
| if (status) { |
| status = 0; |
| goto done; |
| } |
| |
| if (nvmet_ns_revalidate(req->ns)) { |
| mutex_lock(&req->ns->subsys->lock); |
| nvmet_ns_changed(req->ns->subsys, req->ns->nsid); |
| mutex_unlock(&req->ns->subsys->lock); |
| } |
| |
| /* |
| * 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 = NVME_NS_NMIC_SHARED; |
| 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 (req->sq->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 |= NVME_NS_ATTR_RO; |
| 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) |
| { |
| off_t off = 0; |
| u16 status; |
| |
| status = nvmet_req_find_ns(req); |
| if (status) |
| goto out; |
| |
| if (memchr_inv(&req->ns->uuid, 0, sizeof(req->ns->uuid))) { |
| status = nvmet_copy_ns_identifier(req, NVME_NIDT_UUID, |
| NVME_NIDT_UUID_LEN, |
| &req->ns->uuid, &off); |
| if (status) |
| goto out; |
| } |
| if (memchr_inv(req->ns->nguid, 0, sizeof(req->ns->nguid))) { |
| status = nvmet_copy_ns_identifier(req, NVME_NIDT_NGUID, |
| NVME_NIDT_NGUID_LEN, |
| &req->ns->nguid, &off); |
| if (status) |
| goto out; |
| } |
| |
| status = nvmet_copy_ns_identifier(req, NVME_NIDT_CSI, |
| NVME_NIDT_CSI_LEN, |
| &req->ns->csi, &off); |
| if (status) |
| goto out; |
| |
| 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: |
| nvmet_req_complete(req, status); |
| } |
| |
| static bool nvmet_handle_identify_desclist(struct nvmet_req *req) |
| { |
| switch (req->cmd->identify.csi) { |
| case NVME_CSI_NVM: |
| nvmet_execute_identify_desclist(req); |
| return true; |
| case NVME_CSI_ZNS: |
| if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
| nvmet_execute_identify_desclist(req); |
| return true; |
| } |
| return false; |
| default: |
| return false; |
| } |
| } |
| |
| 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: |
| switch (req->cmd->identify.csi) { |
| case NVME_CSI_NVM: |
| return nvmet_execute_identify_ns(req); |
| default: |
| break; |
| } |
| break; |
| case NVME_ID_CNS_CS_NS: |
| if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
| switch (req->cmd->identify.csi) { |
| case NVME_CSI_ZNS: |
| return nvmet_execute_identify_cns_cs_ns(req); |
| default: |
| break; |
| } |
| } |
| break; |
| case NVME_ID_CNS_CTRL: |
| switch (req->cmd->identify.csi) { |
| case NVME_CSI_NVM: |
| return nvmet_execute_identify_ctrl(req); |
| } |
| break; |
| case NVME_ID_CNS_CS_CTRL: |
| if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) { |
| switch (req->cmd->identify.csi) { |
| case NVME_CSI_ZNS: |
| return nvmet_execute_identify_cns_cs_ctrl(req); |
| default: |
| break; |
| } |
| } |
| break; |
| case NVME_ID_CNS_NS_ACTIVE_LIST: |
| switch (req->cmd->identify.csi) { |
| case NVME_CSI_NVM: |
| return nvmet_execute_identify_nslist(req); |
| default: |
| break; |
| } |
| break; |
| case NVME_ID_CNS_NS_DESC_LIST: |
| if (nvmet_handle_identify_desclist(req) == true) |
| return; |
| break; |
| } |
| |
| nvmet_req_cns_error_complete(req); |
| } |
| |
| /* |
| * 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 = nvmet_req_subsys(req); |
| u16 status; |
| |
| status = nvmet_req_find_ns(req); |
| if (status) |
| 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 = nvmet_req_subsys(req); |
| 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 = nvmet_req_subsys(req); |
| u32 result; |
| |
| result = nvmet_req_find_ns(req); |
| if (result) |
| return result; |
| |
| 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 = nvmet_req_subsys(req); |
| 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); |
| |
| queue_work(nvmet_wq, &ctrl->async_event_work); |
| } |
| |
| void nvmet_execute_keep_alive(struct nvmet_req *req) |
| { |
| struct nvmet_ctrl *ctrl = req->sq->ctrl; |
| u16 status = 0; |
| |
| if (!nvmet_check_transfer_len(req, 0)) |
| return; |
| |
| if (!ctrl->kato) { |
| status = NVME_SC_KA_TIMEOUT_INVALID; |
| goto out; |
| } |
| |
| 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); |
| out: |
| nvmet_req_complete(req, status); |
| } |
| |
| 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_admin_cmd(req); |
| if (unlikely(!nvmet_check_auth_status(req))) |
| return NVME_SC_AUTH_REQUIRED | NVME_SC_DNR; |
| if (nvmet_is_disc_subsys(nvmet_req_subsys(req))) |
| return nvmet_parse_discovery_cmd(req); |
| |
| ret = nvmet_check_ctrl_status(req); |
| if (unlikely(ret)) |
| return ret; |
| |
| if (nvmet_is_passthru_req(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; |
| default: |
| return nvmet_report_invalid_opcode(req); |
| } |
| } |