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linux/drivers/nvme/target/fabrics-cmd.c
Linus Torvalds 3e78198862 for-6.11/block-20240710
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Merge tag 'for-6.11/block-20240710' of git://git.kernel.dk/linux

Pull block updates from Jens Axboe:

 - NVMe updates via Keith:
     - Device initialization memory leak fixes (Keith)
     - More constants defined (Weiwen)
     - Target debugfs support (Hannes)
     - PCIe subsystem reset enhancements (Keith)
     - Queue-depth multipath policy (Redhat and PureStorage)
     - Implement get_unique_id (Christoph)
     - Authentication error fixes (Gaosheng)

 - MD updates via Song
     - sync_action fix and refactoring (Yu Kuai)
     - Various small fixes (Christoph Hellwig, Li Nan, and Ofir Gal, Yu
       Kuai, Benjamin Marzinski, Christophe JAILLET, Yang Li)

 - Fix loop detach/open race (Gulam)

 - Fix lower control limit for blk-throttle (Yu)

 - Add module descriptions to various drivers (Jeff)

 - Add support for atomic writes for block devices, and statx reporting
   for same. Includes SCSI and NVMe (John, Prasad, Alan)

 - Add IO priority information to block trace points (Dongliang)

 - Various zone improvements and tweaks (Damien)

 - mq-deadline tag reservation improvements (Bart)

 - Ignore direct reclaim swap writes in writeback throttling (Baokun)

 - Block integrity improvements and fixes (Anuj)

 - Add basic support for rust based block drivers. Has a dummy null_blk
   variant for now (Andreas)

 - Series converting driver settings to queue limits, and cleanups and
   fixes related to that (Christoph)

 - Cleanup for poking too deeply into the bvec internals, in preparation
   for DMA mapping API changes (Christoph)

 - Various minor tweaks and fixes (Jiapeng, John, Kanchan, Mikulas,
   Ming, Zhu, Damien, Christophe, Chaitanya)

* tag 'for-6.11/block-20240710' of git://git.kernel.dk/linux: (206 commits)
  floppy: add missing MODULE_DESCRIPTION() macro
  loop: add missing MODULE_DESCRIPTION() macro
  ublk_drv: add missing MODULE_DESCRIPTION() macro
  xen/blkback: add missing MODULE_DESCRIPTION() macro
  block/rnbd: Constify struct kobj_type
  block: take offset into account in blk_bvec_map_sg again
  block: fix get_max_segment_size() warning
  loop: Don't bother validating blocksize
  virtio_blk: Don't bother validating blocksize
  null_blk: Don't bother validating blocksize
  block: Validate logical block size in blk_validate_limits()
  virtio_blk: Fix default logical block size fallback
  nvmet-auth: fix nvmet_auth hash error handling
  nvme: implement ->get_unique_id
  block: pass a phys_addr_t to get_max_segment_size
  block: add a bvec_phys helper
  blk-lib: check for kill signal in ioctl BLKZEROOUT
  block: limit the Write Zeroes to manually writing zeroes fallback
  block: refacto blkdev_issue_zeroout
  block: move read-only and supported checks into (__)blkdev_issue_zeroout
  ...
2024-07-15 14:20:22 -07:00

368 lines
9.3 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* NVMe Fabrics command implementation.
* Copyright (c) 2015-2016 HGST, a Western Digital Company.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/blkdev.h>
#include "nvmet.h"
static void nvmet_execute_prop_set(struct nvmet_req *req)
{
u64 val = le64_to_cpu(req->cmd->prop_set.value);
u16 status = 0;
if (!nvmet_check_transfer_len(req, 0))
return;
if (req->cmd->prop_set.attrib & 1) {
req->error_loc =
offsetof(struct nvmf_property_set_command, attrib);
status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
goto out;
}
switch (le32_to_cpu(req->cmd->prop_set.offset)) {
case NVME_REG_CC:
nvmet_update_cc(req->sq->ctrl, val);
break;
default:
req->error_loc =
offsetof(struct nvmf_property_set_command, offset);
status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
}
out:
nvmet_req_complete(req, status);
}
static void nvmet_execute_prop_get(struct nvmet_req *req)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
u16 status = 0;
u64 val = 0;
if (!nvmet_check_transfer_len(req, 0))
return;
if (req->cmd->prop_get.attrib & 1) {
switch (le32_to_cpu(req->cmd->prop_get.offset)) {
case NVME_REG_CAP:
val = ctrl->cap;
break;
default:
status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
break;
}
} else {
switch (le32_to_cpu(req->cmd->prop_get.offset)) {
case NVME_REG_VS:
val = ctrl->subsys->ver;
break;
case NVME_REG_CC:
val = ctrl->cc;
break;
case NVME_REG_CSTS:
val = ctrl->csts;
break;
default:
status = NVME_SC_INVALID_FIELD | NVME_STATUS_DNR;
break;
}
}
if (status && req->cmd->prop_get.attrib & 1) {
req->error_loc =
offsetof(struct nvmf_property_get_command, offset);
} else {
req->error_loc =
offsetof(struct nvmf_property_get_command, attrib);
}
req->cqe->result.u64 = cpu_to_le64(val);
nvmet_req_complete(req, status);
}
u16 nvmet_parse_fabrics_admin_cmd(struct nvmet_req *req)
{
struct nvme_command *cmd = req->cmd;
switch (cmd->fabrics.fctype) {
case nvme_fabrics_type_property_set:
req->execute = nvmet_execute_prop_set;
break;
case nvme_fabrics_type_property_get:
req->execute = nvmet_execute_prop_get;
break;
#ifdef CONFIG_NVME_TARGET_AUTH
case nvme_fabrics_type_auth_send:
req->execute = nvmet_execute_auth_send;
break;
case nvme_fabrics_type_auth_receive:
req->execute = nvmet_execute_auth_receive;
break;
#endif
default:
pr_debug("received unknown capsule type 0x%x\n",
cmd->fabrics.fctype);
req->error_loc = offsetof(struct nvmf_common_command, fctype);
return NVME_SC_INVALID_OPCODE | NVME_STATUS_DNR;
}
return 0;
}
u16 nvmet_parse_fabrics_io_cmd(struct nvmet_req *req)
{
struct nvme_command *cmd = req->cmd;
switch (cmd->fabrics.fctype) {
#ifdef CONFIG_NVME_TARGET_AUTH
case nvme_fabrics_type_auth_send:
req->execute = nvmet_execute_auth_send;
break;
case nvme_fabrics_type_auth_receive:
req->execute = nvmet_execute_auth_receive;
break;
#endif
default:
pr_debug("received unknown capsule type 0x%x\n",
cmd->fabrics.fctype);
req->error_loc = offsetof(struct nvmf_common_command, fctype);
return NVME_SC_INVALID_OPCODE | NVME_STATUS_DNR;
}
return 0;
}
static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
{
struct nvmf_connect_command *c = &req->cmd->connect;
u16 qid = le16_to_cpu(c->qid);
u16 sqsize = le16_to_cpu(c->sqsize);
struct nvmet_ctrl *old;
u16 mqes = NVME_CAP_MQES(ctrl->cap);
u16 ret;
if (!sqsize) {
pr_warn("queue size zero!\n");
req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
ret = NVME_SC_CONNECT_INVALID_PARAM | NVME_STATUS_DNR;
goto err;
}
if (ctrl->sqs[qid] != NULL) {
pr_warn("qid %u has already been created\n", qid);
req->error_loc = offsetof(struct nvmf_connect_command, qid);
return NVME_SC_CMD_SEQ_ERROR | NVME_STATUS_DNR;
}
/* for fabrics, this value applies to only the I/O Submission Queues */
if (qid && sqsize > mqes) {
pr_warn("sqsize %u is larger than MQES supported %u cntlid %d\n",
sqsize, mqes, ctrl->cntlid);
req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
return NVME_SC_CONNECT_INVALID_PARAM | NVME_STATUS_DNR;
}
old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
if (old) {
pr_warn("queue already connected!\n");
req->error_loc = offsetof(struct nvmf_connect_command, opcode);
return NVME_SC_CONNECT_CTRL_BUSY | NVME_STATUS_DNR;
}
/* note: convert queue size from 0's-based value to 1's-based value */
nvmet_cq_setup(ctrl, req->cq, qid, sqsize + 1);
nvmet_sq_setup(ctrl, req->sq, qid, sqsize + 1);
if (c->cattr & NVME_CONNECT_DISABLE_SQFLOW) {
req->sq->sqhd_disabled = true;
req->cqe->sq_head = cpu_to_le16(0xffff);
}
if (ctrl->ops->install_queue) {
ret = ctrl->ops->install_queue(req->sq);
if (ret) {
pr_err("failed to install queue %d cntlid %d ret %x\n",
qid, ctrl->cntlid, ret);
ctrl->sqs[qid] = NULL;
goto err;
}
}
return 0;
err:
req->sq->ctrl = NULL;
return ret;
}
static u32 nvmet_connect_result(struct nvmet_ctrl *ctrl)
{
return (u32)ctrl->cntlid |
(nvmet_has_auth(ctrl) ? NVME_CONNECT_AUTHREQ_ATR : 0);
}
static void nvmet_execute_admin_connect(struct nvmet_req *req)
{
struct nvmf_connect_command *c = &req->cmd->connect;
struct nvmf_connect_data *d;
struct nvmet_ctrl *ctrl = NULL;
u16 status;
u8 dhchap_status;
if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data)))
return;
d = kmalloc(sizeof(*d), GFP_KERNEL);
if (!d) {
status = NVME_SC_INTERNAL;
goto complete;
}
status = nvmet_copy_from_sgl(req, 0, d, sizeof(*d));
if (status)
goto out;
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));
req->error_loc = offsetof(struct nvmf_connect_command, recfmt);
status = NVME_SC_CONNECT_FORMAT | NVME_STATUS_DNR;
goto out;
}
if (unlikely(d->cntlid != cpu_to_le16(0xffff))) {
pr_warn("connect attempt for invalid controller ID %#x\n",
d->cntlid);
status = NVME_SC_CONNECT_INVALID_PARAM | NVME_STATUS_DNR;
req->cqe->result.u32 = IPO_IATTR_CONNECT_DATA(cntlid);
goto out;
}
d->subsysnqn[NVMF_NQN_FIELD_LEN - 1] = '\0';
d->hostnqn[NVMF_NQN_FIELD_LEN - 1] = '\0';
status = nvmet_alloc_ctrl(d->subsysnqn, d->hostnqn, req,
le32_to_cpu(c->kato), &ctrl);
if (status)
goto out;
uuid_copy(&ctrl->hostid, &d->hostid);
dhchap_status = nvmet_setup_auth(ctrl);
if (dhchap_status) {
pr_err("Failed to setup authentication, dhchap status %u\n",
dhchap_status);
nvmet_ctrl_put(ctrl);
if (dhchap_status == NVME_AUTH_DHCHAP_FAILURE_FAILED)
status = (NVME_SC_CONNECT_INVALID_HOST | NVME_STATUS_DNR);
else
status = NVME_SC_INTERNAL;
goto out;
}
status = nvmet_install_queue(ctrl, req);
if (status) {
nvmet_ctrl_put(ctrl);
goto out;
}
pr_info("creating %s controller %d for subsystem %s for NQN %s%s%s.\n",
nvmet_is_disc_subsys(ctrl->subsys) ? "discovery" : "nvm",
ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn,
ctrl->pi_support ? " T10-PI is enabled" : "",
nvmet_has_auth(ctrl) ? " with DH-HMAC-CHAP" : "");
req->cqe->result.u32 = cpu_to_le32(nvmet_connect_result(ctrl));
out:
kfree(d);
complete:
nvmet_req_complete(req, status);
}
static void nvmet_execute_io_connect(struct nvmet_req *req)
{
struct nvmf_connect_command *c = &req->cmd->connect;
struct nvmf_connect_data *d;
struct nvmet_ctrl *ctrl;
u16 qid = le16_to_cpu(c->qid);
u16 status;
if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data)))
return;
d = kmalloc(sizeof(*d), GFP_KERNEL);
if (!d) {
status = NVME_SC_INTERNAL;
goto complete;
}
status = nvmet_copy_from_sgl(req, 0, d, sizeof(*d));
if (status)
goto out;
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));
status = NVME_SC_CONNECT_FORMAT | NVME_STATUS_DNR;
goto out;
}
d->subsysnqn[NVMF_NQN_FIELD_LEN - 1] = '\0';
d->hostnqn[NVMF_NQN_FIELD_LEN - 1] = '\0';
ctrl = nvmet_ctrl_find_get(d->subsysnqn, d->hostnqn,
le16_to_cpu(d->cntlid), req);
if (!ctrl) {
status = NVME_SC_CONNECT_INVALID_PARAM | NVME_STATUS_DNR;
goto out;
}
if (unlikely(qid > ctrl->subsys->max_qid)) {
pr_warn("invalid queue id (%d)\n", qid);
status = NVME_SC_CONNECT_INVALID_PARAM | NVME_STATUS_DNR;
req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(qid);
goto out_ctrl_put;
}
status = nvmet_install_queue(ctrl, req);
if (status)
goto out_ctrl_put;
pr_debug("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid);
req->cqe->result.u32 = cpu_to_le32(nvmet_connect_result(ctrl));
out:
kfree(d);
complete:
nvmet_req_complete(req, status);
return;
out_ctrl_put:
nvmet_ctrl_put(ctrl);
goto out;
}
u16 nvmet_parse_connect_cmd(struct nvmet_req *req)
{
struct nvme_command *cmd = req->cmd;
if (!nvme_is_fabrics(cmd)) {
pr_debug("invalid command 0x%x on unconnected queue.\n",
cmd->fabrics.opcode);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_STATUS_DNR;
}
if (cmd->fabrics.fctype != nvme_fabrics_type_connect) {
pr_debug("invalid capsule type 0x%x on unconnected queue.\n",
cmd->fabrics.fctype);
req->error_loc = offsetof(struct nvmf_common_command, fctype);
return NVME_SC_INVALID_OPCODE | NVME_STATUS_DNR;
}
if (cmd->connect.qid == 0)
req->execute = nvmet_execute_admin_connect;
else
req->execute = nvmet_execute_io_connect;
return 0;
}