microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
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Merge branch 'nvme-5.7-rc1' of git://git.infradead.org/nvme into for-5.7/drivers 

Pull 5.7 NVMe updates from Keith.

* 'nvme-5.7-rc1' of git://git.infradead.org/nvme: (42 commits)
  nvme: cleanup namespace identifier reporting in nvme_init_ns_head
  nvme: rename __nvme_find_ns_head to nvme_find_ns_head
  nvme: refactor nvme_identify_ns_descs error handling
  nvme-tcp: Add warning on state change failure at nvme_tcp_setup_ctrl
  nvme-rdma: Add warning on state change failure at nvme_rdma_setup_ctrl
  nvme: Fix controller creation races with teardown flow
  nvme: Make nvme_uninit_ctrl symmetric to nvme_init_ctrl
  nvme: Fix ctrl use-after-free during sysfs deletion
  nvme-pci: Re-order nvme_pci_free_ctrl
  nvme: Remove unused return code from nvme_delete_ctrl_sync
  nvme: Use nvme_state_terminal helper
  nvme: release ida resources
  nvme: Add compat_ioctl handler for NVME_IOCTL_SUBMIT_IO
  nvmet-tcp: optimize tcp stack TX when data digest is used
  nvme-fabrics: Use scnprintf() for avoiding potential buffer overflow
  nvme-multipath: do not reset on unknown status
  nvmet-rdma: allocate RW ctxs according to mdts
  nvmet-rdma: Implement get_mdts controller op
  nvmet: Add get_mdts op for controllers
  nvme-pci: properly print controller address
  ...
This commit is contained in:
Jens Axboe 2020-03-25 16:20:51 -06:00
Родитель 5ae3a2c03d 43fcd9e1ea
Коммит 01bb12fce7
16 изменённых файлов: 533 добавлений и 235 удалений
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2
drivers/nvme/host/Kconfig
Просмотреть файл

@ -32,8 +32,6 @@ config NVME_HWMON
a hardware monitoring device will be created for each NVMe drive
in the system.
If unsure, say N.
config NVME_FABRICS
tristate

255
drivers/nvme/host/core.c
Просмотреть файл

@ -171,7 +171,6 @@ static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl)
nvme_remove_namespaces(ctrl);
ctrl->ops->delete_ctrl(ctrl);
nvme_uninit_ctrl(ctrl);
nvme_put_ctrl(ctrl);
}
static void nvme_delete_ctrl_work(struct work_struct *work)
@ -192,21 +191,16 @@ int nvme_delete_ctrl(struct nvme_ctrl *ctrl)
}
EXPORT_SYMBOL_GPL(nvme_delete_ctrl);
static int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)
static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)
{
int ret = 0;
/*
* Keep a reference until nvme_do_delete_ctrl() complete,
* since ->delete_ctrl can free the controller.
*/
nvme_get_ctrl(ctrl);
if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING))
ret = -EBUSY;
if (!ret)
if (nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING))
nvme_do_delete_ctrl(ctrl);
nvme_put_ctrl(ctrl);
return ret;
}
static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
@ -291,11 +285,8 @@ void nvme_complete_rq(struct request *req)
nvme_req(req)->ctrl->comp_seen = true;
if (unlikely(status != BLK_STS_OK && nvme_req_needs_retry(req))) {
if ((req->cmd_flags & REQ_NVME_MPATH) &&
blk_path_error(status)) {
nvme_failover_req(req);
if ((req->cmd_flags & REQ_NVME_MPATH) && nvme_failover_req(req))
return;
}
if (!blk_queue_dying(req->q)) {
nvme_retry_req(req);
@ -1055,6 +1046,43 @@ static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id)
return error;
}
static int nvme_process_ns_desc(struct nvme_ctrl *ctrl, struct nvme_ns_ids *ids,
struct nvme_ns_id_desc *cur)
{
const char *warn_str = "ctrl returned bogus length:";
void *data = cur;
switch (cur->nidt) {
case NVME_NIDT_EUI64:
if (cur->nidl != NVME_NIDT_EUI64_LEN) {
dev_warn(ctrl->device, "%s %d for NVME_NIDT_EUI64\n",
warn_str, cur->nidl);
return -1;
}
memcpy(ids->eui64, data + sizeof(*cur), NVME_NIDT_EUI64_LEN);
return NVME_NIDT_EUI64_LEN;
case NVME_NIDT_NGUID:
if (cur->nidl != NVME_NIDT_NGUID_LEN) {
dev_warn(ctrl->device, "%s %d for NVME_NIDT_NGUID\n",
warn_str, cur->nidl);
return -1;
}
memcpy(ids->nguid, data + sizeof(*cur), NVME_NIDT_NGUID_LEN);
return NVME_NIDT_NGUID_LEN;
case NVME_NIDT_UUID:
if (cur->nidl != NVME_NIDT_UUID_LEN) {
dev_warn(ctrl->device, "%s %d for NVME_NIDT_UUID\n",
warn_str, cur->nidl);
return -1;
}
uuid_copy(&ids->uuid, data + sizeof(*cur));
return NVME_NIDT_UUID_LEN;
default:
/* Skip unknown types */
return cur->nidl;
}
}
static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid,
struct nvme_ns_ids *ids)
{
@ -1074,8 +1102,17 @@ static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid,
status = nvme_submit_sync_cmd(ctrl->admin_q, &c, data,
NVME_IDENTIFY_DATA_SIZE);
if (status)
if (status) {
dev_warn(ctrl->device,
"Identify Descriptors failed (%d)\n", status);
/*
* Don't treat an error as fatal, as we potentially already
* have a NGUID or EUI-64.
*/
if (status > 0)
status = 0;
goto free_data;
}
for (pos = 0; pos < NVME_IDENTIFY_DATA_SIZE; pos += len) {
struct nvme_ns_id_desc *cur = data + pos;
@ -1083,42 +1120,9 @@ static int nvme_identify_ns_descs(struct nvme_ctrl *ctrl, unsigned nsid,
if (cur->nidl == 0)
break;
switch (cur->nidt) {
case NVME_NIDT_EUI64:
if (cur->nidl != NVME_NIDT_EUI64_LEN) {
dev_warn(ctrl->device,
"ctrl returned bogus length: %d for NVME_NIDT_EUI64\n",
cur->nidl);
goto free_data;
}
len = NVME_NIDT_EUI64_LEN;
memcpy(ids->eui64, data + pos + sizeof(*cur), len);
break;
case NVME_NIDT_NGUID:
if (cur->nidl != NVME_NIDT_NGUID_LEN) {
dev_warn(ctrl->device,
"ctrl returned bogus length: %d for NVME_NIDT_NGUID\n",
cur->nidl);
goto free_data;
}
len = NVME_NIDT_NGUID_LEN;
memcpy(ids->nguid, data + pos + sizeof(*cur), len);
break;
case NVME_NIDT_UUID:
if (cur->nidl != NVME_NIDT_UUID_LEN) {
dev_warn(ctrl->device,
"ctrl returned bogus length: %d for NVME_NIDT_UUID\n",
cur->nidl);
goto free_data;
}
len = NVME_NIDT_UUID_LEN;
uuid_copy(&ids->uuid, data + pos + sizeof(*cur));
break;
default:
/* Skip unknown types */
len = cur->nidl;
break;
}
len = nvme_process_ns_desc(ctrl, ids, cur);
if (len < 0)
goto free_data;
len += sizeof(*cur);
}
@ -1584,6 +1588,47 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
return ret;
}
#ifdef CONFIG_COMPAT
struct nvme_user_io32 {
__u8 opcode;
__u8 flags;
__u16 control;
__u16 nblocks;
__u16 rsvd;
__u64 metadata;
__u64 addr;
__u64 slba;
__u32 dsmgmt;
__u32 reftag;
__u16 apptag;
__u16 appmask;
} __attribute__((__packed__));
#define NVME_IOCTL_SUBMIT_IO32 _IOW('N', 0x42, struct nvme_user_io32)
static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
/*
* Corresponds to the difference of NVME_IOCTL_SUBMIT_IO
* between 32 bit programs and 64 bit kernel.
* The cause is that the results of sizeof(struct nvme_user_io),
* which is used to define NVME_IOCTL_SUBMIT_IO,
* are not same between 32 bit compiler and 64 bit compiler.
* NVME_IOCTL_SUBMIT_IO32 is for 64 bit kernel handling
* NVME_IOCTL_SUBMIT_IO issued from 32 bit programs.
* Other IOCTL numbers are same between 32 bit and 64 bit.
* So there is nothing to do regarding to other IOCTL numbers.
*/
if (cmd == NVME_IOCTL_SUBMIT_IO32)
return nvme_ioctl(bdev, mode, NVME_IOCTL_SUBMIT_IO, arg);
return nvme_ioctl(bdev, mode, cmd, arg);
}
#else
#define nvme_compat_ioctl NULL
#endif /* CONFIG_COMPAT */
static int nvme_open(struct block_device *bdev, fmode_t mode)
{
struct nvme_ns *ns = bdev->bd_disk->private_data;
@ -1721,26 +1766,15 @@ static void nvme_config_write_zeroes(struct gendisk *disk, struct nvme_ns *ns)
static int nvme_report_ns_ids(struct nvme_ctrl *ctrl, unsigned int nsid,
struct nvme_id_ns *id, struct nvme_ns_ids *ids)
{
int ret = 0;
memset(ids, 0, sizeof(*ids));
if (ctrl->vs >= NVME_VS(1, 1, 0))
memcpy(ids->eui64, id->eui64, sizeof(id->eui64));
if (ctrl->vs >= NVME_VS(1, 2, 0))
memcpy(ids->nguid, id->nguid, sizeof(id->nguid));
if (ctrl->vs >= NVME_VS(1, 3, 0)) {
/* Don't treat error as fatal we potentially
* already have a NGUID or EUI-64
*/
ret = nvme_identify_ns_descs(ctrl, nsid, ids);
if (ret)
dev_warn(ctrl->device,
"Identify Descriptors failed (%d)\n", ret);
if (ret > 0)
ret = 0;
}
return ret;
if (ctrl->vs >= NVME_VS(1, 3, 0))
return nvme_identify_ns_descs(ctrl, nsid, ids);
return 0;
}
static bool nvme_ns_ids_valid(struct nvme_ns_ids *ids)
@ -2027,7 +2061,7 @@ EXPORT_SYMBOL_GPL(nvme_sec_submit);
static const struct block_device_operations nvme_fops = {
.owner = THIS_MODULE,
.ioctl = nvme_ioctl,
.compat_ioctl = nvme_ioctl,
.compat_ioctl = nvme_compat_ioctl,
.open = nvme_open,
.release = nvme_release,
.getgeo = nvme_getgeo,
@ -2055,7 +2089,7 @@ const struct block_device_operations nvme_ns_head_ops = {
.open = nvme_ns_head_open,
.release = nvme_ns_head_release,
.ioctl = nvme_ioctl,
.compat_ioctl = nvme_ioctl,
.compat_ioctl = nvme_compat_ioctl,
.getgeo = nvme_getgeo,
.pr_ops = &nvme_pr_ops,
};
@ -2074,13 +2108,13 @@ static int nvme_wait_ready(struct nvme_ctrl *ctrl, u64 cap, bool enabled)
if ((csts & NVME_CSTS_RDY) == bit)
break;
msleep(100);
usleep_range(1000, 2000);
if (fatal_signal_pending(current))
return -EINTR;
if (time_after(jiffies, timeout)) {
dev_err(ctrl->device,
"Device not ready; aborting %s\n", enabled ?
"initialisation" : "reset");
"Device not ready; aborting %s, CSTS=0x%x\n",
enabled ? "initialisation" : "reset", csts);
return -ENODEV;
}
}
@ -2591,8 +2625,7 @@ static bool nvme_validate_cntlid(struct nvme_subsystem *subsys,
lockdep_assert_held(&nvme_subsystems_lock);
list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) {
if (tmp->state == NVME_CTRL_DELETING ||
tmp->state == NVME_CTRL_DEAD)
if (nvme_state_terminal(tmp))
continue;
if (tmp->cntlid == ctrl->cntlid) {
@ -3193,6 +3226,10 @@ static ssize_t nvme_sysfs_delete(struct device *dev,
{
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
/* Can't delete non-created controllers */
if (!ctrl->created)
return -EBUSY;
if (device_remove_file_self(dev, attr))
nvme_delete_ctrl_sync(ctrl);
return count;
@ -3242,6 +3279,26 @@ static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev,
}
static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL);
static ssize_t nvme_sysfs_show_hostnqn(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->opts->host->nqn);
}
static DEVICE_ATTR(hostnqn, S_IRUGO, nvme_sysfs_show_hostnqn, NULL);
static ssize_t nvme_sysfs_show_hostid(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%pU\n", &ctrl->opts->host->id);
}
static DEVICE_ATTR(hostid, S_IRUGO, nvme_sysfs_show_hostid, NULL);
static ssize_t nvme_sysfs_show_address(struct device *dev,
struct device_attribute *attr,
char *buf)
@ -3267,6 +3324,8 @@ static struct attribute *nvme_dev_attrs[] = {
&dev_attr_numa_node.attr,
&dev_attr_queue_count.attr,
&dev_attr_sqsize.attr,
&dev_attr_hostnqn.attr,
&dev_attr_hostid.attr,
NULL
};
@ -3280,6 +3339,10 @@ static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj,
return 0;
if (a == &dev_attr_address.attr && !ctrl->ops->get_address)
return 0;
if (a == &dev_attr_hostnqn.attr && !ctrl->opts)
return 0;
if (a == &dev_attr_hostid.attr && !ctrl->opts)
return 0;
return a->mode;
}
@ -3294,7 +3357,7 @@ static const struct attribute_group *nvme_dev_attr_groups[] = {
NULL,
};
static struct nvme_ns_head *__nvme_find_ns_head(struct nvme_subsystem *subsys,
static struct nvme_ns_head *nvme_find_ns_head(struct nvme_subsystem *subsys,
unsigned nsid)
{
struct nvme_ns_head *h;
@ -3327,7 +3390,8 @@ static int __nvme_check_ids(struct nvme_subsystem *subsys,
}
static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl,
unsigned nsid, struct nvme_id_ns *id)
unsigned nsid, struct nvme_id_ns *id,
struct nvme_ns_ids *ids)
{
struct nvme_ns_head *head;
size_t size = sizeof(*head);
@ -3350,12 +3414,9 @@ static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl,
goto out_ida_remove;
head->subsys = ctrl->subsys;
head->ns_id = nsid;
head->ids = *ids;
kref_init(&head->ref);
ret = nvme_report_ns_ids(ctrl, nsid, id, &head->ids);
if (ret)
goto out_cleanup_srcu;
ret = __nvme_check_ids(ctrl->subsys, head);
if (ret) {
dev_err(ctrl->device,
@ -3390,24 +3451,23 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
struct nvme_ctrl *ctrl = ns->ctrl;
bool is_shared = id->nmic & (1 << 0);
struct nvme_ns_head *head = NULL;
struct nvme_ns_ids ids;
int ret = 0;
ret = nvme_report_ns_ids(ctrl, nsid, id, &ids);
if (ret)
goto out;
mutex_lock(&ctrl->subsys->lock);
if (is_shared)
head = __nvme_find_ns_head(ctrl->subsys, nsid);
head = nvme_find_ns_head(ctrl->subsys, nsid);
if (!head) {
head = nvme_alloc_ns_head(ctrl, nsid, id);
head = nvme_alloc_ns_head(ctrl, nsid, id, &ids);
if (IS_ERR(head)) {
ret = PTR_ERR(head);
goto out_unlock;
}
} else {
struct nvme_ns_ids ids;
ret = nvme_report_ns_ids(ctrl, nsid, id, &ids);
if (ret)
goto out_unlock;
if (!nvme_ns_ids_equal(&head->ids, &ids)) {
dev_err(ctrl->device,
"IDs don't match for shared namespace %d\n",
@ -3422,6 +3482,7 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
out_unlock:
mutex_unlock(&ctrl->subsys->lock);
out:
if (ret > 0)
ret = blk_status_to_errno(nvme_error_status(ret));
return ret;
@ -3480,7 +3541,7 @@ static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns)
return 0;
}
static int nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
{
struct nvme_ns *ns;
struct gendisk *disk;
@ -3490,13 +3551,11 @@ static int nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
ns = kzalloc_node(sizeof(*ns), GFP_KERNEL, node);
if (!ns)
return -ENOMEM;
return;
ns->queue = blk_mq_init_queue(ctrl->tagset);
if (IS_ERR(ns->queue)) {
ret = PTR_ERR(ns->queue);
if (IS_ERR(ns->queue))
goto out_free_ns;
}
if (ctrl->opts && ctrl->opts->data_digest)
ns->queue->backing_dev_info->capabilities
@ -3519,10 +3578,8 @@ static int nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
if (ret)
goto out_free_queue;
if (id->ncap == 0) {
ret = -EINVAL;
if (id->ncap == 0) /* no namespace (legacy quirk) */
goto out_free_id;
}
ret = nvme_init_ns_head(ns, nsid, id);
if (ret)
@ -3531,10 +3588,8 @@ static int nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
nvme_set_disk_name(disk_name, ns, ctrl, &flags);
disk = alloc_disk_node(0, node);
if (!disk) {
ret = -ENOMEM;
if (!disk)
goto out_unlink_ns;
}
disk->fops = &nvme_fops;
disk->private_data = ns;
@ -3565,7 +3620,7 @@ static int nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
nvme_fault_inject_init(&ns->fault_inject, ns->disk->disk_name);
kfree(id);
return 0;
return;
out_put_disk:
put_disk(ns->disk);
out_unlink_ns:
@ -3579,9 +3634,6 @@ static int nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
blk_cleanup_queue(ns->queue);
out_free_ns:
kfree(ns);
if (ret > 0)
ret = blk_status_to_errno(nvme_error_status(ret));
return ret;
}
static void nvme_ns_remove(struct nvme_ns *ns)
@ -3987,6 +4039,7 @@ void nvme_start_ctrl(struct nvme_ctrl *ctrl)
nvme_queue_scan(ctrl);
nvme_start_queues(ctrl);
}
ctrl->created = true;
}
EXPORT_SYMBOL_GPL(nvme_start_ctrl);
@ -3995,6 +4048,7 @@ void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
nvme_fault_inject_fini(&ctrl->fault_inject);
dev_pm_qos_hide_latency_tolerance(ctrl->device);
cdev_device_del(&ctrl->cdev, ctrl->device);
nvme_put_ctrl(ctrl);
}
EXPORT_SYMBOL_GPL(nvme_uninit_ctrl);
@ -4077,6 +4131,7 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
if (ret)
goto out_release_instance;
nvme_get_ctrl(ctrl);
cdev_init(&ctrl->cdev, &nvme_dev_fops);
ctrl->cdev.owner = ops->module;
ret = cdev_device_add(&ctrl->cdev, ctrl->device);
@ -4095,6 +4150,7 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
return 0;
out_free_name:
nvme_put_ctrl(ctrl);
kfree_const(ctrl->device->kobj.name);
out_release_instance:
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
@ -4299,6 +4355,7 @@ static void __exit nvme_core_exit(void)
destroy_workqueue(nvme_delete_wq);
destroy_workqueue(nvme_reset_wq);
destroy_workqueue(nvme_wq);
ida_destroy(&nvme_instance_ida);
}
MODULE_LICENSE("GPL");

8
drivers/nvme/host/fabrics.c
Просмотреть файл

@ -105,14 +105,14 @@ int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size)
int len = 0;
if (ctrl->opts->mask & NVMF_OPT_TRADDR)
len += snprintf(buf, size, "traddr=%s", ctrl->opts->traddr);
len += scnprintf(buf, size, "traddr=%s", ctrl->opts->traddr);
if (ctrl->opts->mask & NVMF_OPT_TRSVCID)
len += snprintf(buf + len, size - len, "%strsvcid=%s",
len += scnprintf(buf + len, size - len, "%strsvcid=%s",
(len) ? "," : "", ctrl->opts->trsvcid);
if (ctrl->opts->mask & NVMF_OPT_HOST_TRADDR)
len += snprintf(buf + len, size - len, "%shost_traddr=%s",
len += scnprintf(buf + len, size - len, "%shost_traddr=%s",
(len) ? "," : "", ctrl->opts->host_traddr);
len += snprintf(buf + len, size - len, "\n");
len += scnprintf(buf + len, size - len, "\n");
return len;
}

3
drivers/nvme/host/fc.c
Просмотреть файл

@ -3181,10 +3181,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
goto fail_ctrl;
}
nvme_get_ctrl(&ctrl->ctrl);
if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) {
nvme_put_ctrl(&ctrl->ctrl);
dev_err(ctrl->ctrl.device,
"NVME-FC{%d}: failed to schedule initial connect\n",
ctrl->cnum);

21
drivers/nvme/host/multipath.c
Просмотреть файл

@ -64,17 +64,12 @@ void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
}
}
void nvme_failover_req(struct request *req)
bool nvme_failover_req(struct request *req)
{
struct nvme_ns *ns = req->q->queuedata;
u16 status = nvme_req(req)->status;
unsigned long flags;
spin_lock_irqsave(&ns->head->requeue_lock, flags);
blk_steal_bios(&ns->head->requeue_list, req);
spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
blk_mq_end_request(req, 0);
switch (status & 0x7ff) {
case NVME_SC_ANA_TRANSITION:
case NVME_SC_ANA_INACCESSIBLE:
@ -103,15 +98,17 @@ void nvme_failover_req(struct request *req)
nvme_mpath_clear_current_path(ns);
break;
default:
/*
* Reset the controller for any non-ANA error as we don't know
* what caused the error.
*/
nvme_reset_ctrl(ns->ctrl);
break;
/* This was a non-ANA error so follow the normal error path. */
return false;
}
spin_lock_irqsave(&ns->head->requeue_lock, flags);
blk_steal_bios(&ns->head->requeue_list, req);
spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
blk_mq_end_request(req, 0);
kblockd_schedule_work(&ns->head->requeue_work);
return true;
}
void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)

6
drivers/nvme/host/nvme.h
Просмотреть файл

@ -259,6 +259,7 @@ struct nvme_ctrl {
struct nvme_command ka_cmd;
struct work_struct fw_act_work;
unsigned long events;
bool created;
#ifdef CONFIG_NVME_MULTIPATH
/* asymmetric namespace access: */
@ -550,7 +551,7 @@ void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
struct nvme_ctrl *ctrl, int *flags);
void nvme_failover_req(struct request *req);
bool nvme_failover_req(struct request *req);
void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
@ -599,8 +600,9 @@ static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
}
static inline void nvme_failover_req(struct request *req)
static inline bool nvme_failover_req(struct request *req)
{
return false;
}
static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
{

91
drivers/nvme/host/pci.c
Просмотреть файл

@ -971,39 +971,25 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
nvme_end_request(req, cqe->status, cqe->result);
}
static void nvme_complete_cqes(struct nvme_queue *nvmeq, u16 start, u16 end)
{
while (start != end) {
nvme_handle_cqe(nvmeq, start);
if (++start == nvmeq->q_depth)
start = 0;
}
}
static inline void nvme_update_cq_head(struct nvme_queue *nvmeq)
{
if (nvmeq->cq_head == nvmeq->q_depth - 1) {
if (++nvmeq->cq_head == nvmeq->q_depth) {
nvmeq->cq_head = 0;
nvmeq->cq_phase = !nvmeq->cq_phase;
} else {
nvmeq->cq_head++;
nvmeq->cq_phase ^= 1;
}
}
static inline int nvme_process_cq(struct nvme_queue *nvmeq, u16 *start,
u16 *end, unsigned int tag)
static inline int nvme_process_cq(struct nvme_queue *nvmeq)
{
int found = 0;
*start = nvmeq->cq_head;
while (nvme_cqe_pending(nvmeq)) {
if (tag == -1U || nvmeq->cqes[nvmeq->cq_head].command_id == tag)
found++;
found++;
nvme_handle_cqe(nvmeq, nvmeq->cq_head);
nvme_update_cq_head(nvmeq);
}
*end = nvmeq->cq_head;
if (*start != *end)
if (found)
nvme_ring_cq_doorbell(nvmeq);
return found;
}
@ -1012,21 +998,16 @@ static irqreturn_t nvme_irq(int irq, void *data)
{
struct nvme_queue *nvmeq = data;
irqreturn_t ret = IRQ_NONE;
u16 start, end;
/*
* The rmb/wmb pair ensures we see all updates from a previous run of
* the irq handler, even if that was on another CPU.
*/
rmb();
nvme_process_cq(nvmeq, &start, &end, -1);
if (nvme_process_cq(nvmeq))
ret = IRQ_HANDLED;
wmb();
if (start != end) {
nvme_complete_cqes(nvmeq, start, end);
return IRQ_HANDLED;
}
return ret;
}
@ -1039,46 +1020,30 @@ static irqreturn_t nvme_irq_check(int irq, void *data)
}
/*
* Poll for completions any queue, including those not dedicated to polling.
* Poll for completions for any interrupt driven queue
* Can be called from any context.
*/
static int nvme_poll_irqdisable(struct nvme_queue *nvmeq, unsigned int tag)
static void nvme_poll_irqdisable(struct nvme_queue *nvmeq)
{
struct pci_dev *pdev = to_pci_dev(nvmeq->dev->dev);
u16 start, end;
int found;
/*
* For a poll queue we need to protect against the polling thread
* using the CQ lock. For normal interrupt driven threads we have
* to disable the interrupt to avoid racing with it.
*/
if (test_bit(NVMEQ_POLLED, &nvmeq->flags)) {
spin_lock(&nvmeq->cq_poll_lock);
found = nvme_process_cq(nvmeq, &start, &end, tag);
spin_unlock(&nvmeq->cq_poll_lock);
} else {
disable_irq(pci_irq_vector(pdev, nvmeq->cq_vector));
found = nvme_process_cq(nvmeq, &start, &end, tag);
enable_irq(pci_irq_vector(pdev, nvmeq->cq_vector));
}
WARN_ON_ONCE(test_bit(NVMEQ_POLLED, &nvmeq->flags));
nvme_complete_cqes(nvmeq, start, end);
return found;
disable_irq(pci_irq_vector(pdev, nvmeq->cq_vector));
nvme_process_cq(nvmeq);
enable_irq(pci_irq_vector(pdev, nvmeq->cq_vector));
}
static int nvme_poll(struct blk_mq_hw_ctx *hctx)
{
struct nvme_queue *nvmeq = hctx->driver_data;
u16 start, end;
bool found;
if (!nvme_cqe_pending(nvmeq))
return 0;
spin_lock(&nvmeq->cq_poll_lock);
found = nvme_process_cq(nvmeq, &start, &end, -1);
nvme_complete_cqes(nvmeq, start, end);
found = nvme_process_cq(nvmeq);
spin_unlock(&nvmeq->cq_poll_lock);
return found;
@ -1255,7 +1220,12 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
/*
* Did we miss an interrupt?
*/
if (nvme_poll_irqdisable(nvmeq, req->tag)) {
if (test_bit(NVMEQ_POLLED, &nvmeq->flags))
nvme_poll(req->mq_hctx);
else
nvme_poll_irqdisable(nvmeq);
if (blk_mq_request_completed(req)) {
dev_warn(dev->ctrl.device,
"I/O %d QID %d timeout, completion polled\n",
req->tag, nvmeq->qid);
@ -1398,7 +1368,7 @@ static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown)
else
nvme_disable_ctrl(&dev->ctrl);
nvme_poll_irqdisable(nvmeq, -1);
nvme_poll_irqdisable(nvmeq);
}
/*
@ -1409,13 +1379,10 @@ static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown)
*/
static void nvme_reap_pending_cqes(struct nvme_dev *dev)
{
u16 start, end;
int i;
for (i = dev->ctrl.queue_count - 1; i > 0; i--) {
nvme_process_cq(&dev->queues[i], &start, &end, -1);
nvme_complete_cqes(&dev->queues[i], start, end);
}
for (i = dev->ctrl.queue_count - 1; i > 0; i--)
nvme_process_cq(&dev->queues[i]);
}
static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues,
@ -2503,13 +2470,13 @@ static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl)
struct nvme_dev *dev = to_nvme_dev(ctrl);
nvme_dbbuf_dma_free(dev);
put_device(dev->dev);
nvme_free_tagset(dev);
if (dev->ctrl.admin_q)
blk_put_queue(dev->ctrl.admin_q);
kfree(dev->queues);
free_opal_dev(dev->ctrl.opal_dev);
mempool_destroy(dev->iod_mempool);
put_device(dev->dev);
kfree(dev->queues);
kfree(dev);
}
@ -2689,7 +2656,7 @@ static int nvme_pci_get_address(struct nvme_ctrl *ctrl, char *buf, int size)
{
struct pci_dev *pdev = to_pci_dev(to_nvme_dev(ctrl)->dev);
return snprintf(buf, size, "%s", dev_name(&pdev->dev));
return snprintf(buf, size, "%s\n", dev_name(&pdev->dev));
}
static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {
@ -2835,7 +2802,6 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
dev_info(dev->ctrl.device, "pci function %s\n", dev_name(&pdev->dev));
nvme_reset_ctrl(&dev->ctrl);
nvme_get_ctrl(&dev->ctrl);
async_schedule(nvme_async_probe, dev);
return 0;
@ -2907,10 +2873,9 @@ static void nvme_remove(struct pci_dev *pdev)
nvme_free_host_mem(dev);
nvme_dev_remove_admin(dev);
nvme_free_queues(dev, 0);
nvme_uninit_ctrl(&dev->ctrl);
nvme_release_prp_pools(dev);
nvme_dev_unmap(dev);
nvme_put_ctrl(&dev->ctrl);
nvme_uninit_ctrl(&dev->ctrl);
}
#ifdef CONFIG_PM_SLEEP

9
drivers/nvme/host/rdma.c
Просмотреть файл

@ -1022,8 +1022,13 @@ static int nvme_rdma_setup_ctrl(struct nvme_rdma_ctrl *ctrl, bool new)
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
if (!changed) {
/* state change failure is ok if we're in DELETING state */
/*
* state change failure is ok if we're in DELETING state,
* unless we're during creation of a new controller to
* avoid races with teardown flow.
*/
WARN_ON_ONCE(ctrl->ctrl.state != NVME_CTRL_DELETING);
WARN_ON_ONCE(new);
ret = -EINVAL;
goto destroy_io;
}
@ -2043,8 +2048,6 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISpcs\n",
ctrl->ctrl.opts->subsysnqn, &ctrl->addr);
nvme_get_ctrl(&ctrl->ctrl);
mutex_lock(&nvme_rdma_ctrl_mutex);
list_add_tail(&ctrl->list, &nvme_rdma_ctrl_list);
mutex_unlock(&nvme_rdma_ctrl_mutex);

120
drivers/nvme/host/tcp.c
Просмотреть файл

@ -20,6 +20,16 @@
struct nvme_tcp_queue;
/* Define the socket priority to use for connections were it is desirable
* that the NIC consider performing optimized packet processing or filtering.
* A non-zero value being sufficient to indicate general consideration of any
* possible optimization. Making it a module param allows for alternative
* values that may be unique for some NIC implementations.
*/
static int so_priority;
module_param(so_priority, int, 0644);
MODULE_PARM_DESC(so_priority, "nvme tcp socket optimize priority");
enum nvme_tcp_send_state {
NVME_TCP_SEND_CMD_PDU = 0,
NVME_TCP_SEND_H2C_PDU,
@ -1017,8 +1027,15 @@ static int nvme_tcp_try_send(struct nvme_tcp_queue *queue)
if (req->state == NVME_TCP_SEND_DDGST)
ret = nvme_tcp_try_send_ddgst(req);
done:
if (ret == -EAGAIN)
if (ret == -EAGAIN) {
ret = 0;
} else if (ret < 0) {
dev_err(queue->ctrl->ctrl.device,
"failed to send request %d\n", ret);
if (ret != -EPIPE && ret != -ECONNRESET)
nvme_tcp_fail_request(queue->request);
nvme_tcp_done_send_req(queue);
}
return ret;
}
@ -1049,25 +1066,16 @@ static void nvme_tcp_io_work(struct work_struct *w)
int result;
result = nvme_tcp_try_send(queue);
if (result > 0) {
if (result > 0)
pending = true;
} else if (unlikely(result < 0)) {
dev_err(queue->ctrl->ctrl.device,
"failed to send request %d\n", result);
/*
* Fail the request unless peer closed the connection,
* in which case error recovery flow will complete all.
*/
if ((result != -EPIPE) && (result != -ECONNRESET))
nvme_tcp_fail_request(queue->request);
nvme_tcp_done_send_req(queue);
return;
}
else if (unlikely(result < 0))
break;
result = nvme_tcp_try_recv(queue);
if (result > 0)
pending = true;
else if (unlikely(result < 0))
break;
if (!pending)
return;
@ -1248,13 +1256,67 @@ free_icreq:
return ret;
}
static bool nvme_tcp_admin_queue(struct nvme_tcp_queue *queue)
{
return nvme_tcp_queue_id(queue) == 0;
}
static bool nvme_tcp_default_queue(struct nvme_tcp_queue *queue)
{
struct nvme_tcp_ctrl *ctrl = queue->ctrl;
int qid = nvme_tcp_queue_id(queue);
return !nvme_tcp_admin_queue(queue) &&
qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT];
}
static bool nvme_tcp_read_queue(struct nvme_tcp_queue *queue)
{
struct nvme_tcp_ctrl *ctrl = queue->ctrl;
int qid = nvme_tcp_queue_id(queue);
return !nvme_tcp_admin_queue(queue) &&
!nvme_tcp_default_queue(queue) &&
qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] +
ctrl->io_queues[HCTX_TYPE_READ];
}
static bool nvme_tcp_poll_queue(struct nvme_tcp_queue *queue)
{
struct nvme_tcp_ctrl *ctrl = queue->ctrl;
int qid = nvme_tcp_queue_id(queue);
return !nvme_tcp_admin_queue(queue) &&
!nvme_tcp_default_queue(queue) &&
!nvme_tcp_read_queue(queue) &&
qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] +
ctrl->io_queues[HCTX_TYPE_READ] +
ctrl->io_queues[HCTX_TYPE_POLL];
}
static void nvme_tcp_set_queue_io_cpu(struct nvme_tcp_queue *queue)
{
struct nvme_tcp_ctrl *ctrl = queue->ctrl;
int qid = nvme_tcp_queue_id(queue);
int n = 0;
if (nvme_tcp_default_queue(queue))
n = qid - 1;
else if (nvme_tcp_read_queue(queue))
n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 1;
else if (nvme_tcp_poll_queue(queue))
n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] -
ctrl->io_queues[HCTX_TYPE_READ] - 1;
queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false);
}
static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
int qid, size_t queue_size)
{
struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl);
struct nvme_tcp_queue *queue = &ctrl->queues[qid];
struct linger sol = { .l_onoff = 1, .l_linger = 0 };
int ret, opt, rcv_pdu_size, n;
int ret, opt, rcv_pdu_size;
queue->ctrl = ctrl;
INIT_LIST_HEAD(&queue->send_list);
@ -1309,6 +1371,17 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
goto err_sock;
}
if (so_priority > 0) {
ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY,
(char *)&so_priority, sizeof(so_priority));
if (ret) {
dev_err(ctrl->ctrl.device,
"failed to set SO_PRIORITY sock opt, ret %d\n",
ret);
goto err_sock;
}
}
/* Set socket type of service */
if (nctrl->opts->tos >= 0) {
opt = nctrl->opts->tos;
@ -1322,11 +1395,7 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl,
}
queue->sock->sk->sk_allocation = GFP_ATOMIC;
if (!qid)
n = 0;
else
n = (qid - 1) % num_online_cpus();
queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false);
nvme_tcp_set_queue_io_cpu(queue);
queue->request = NULL;
queue->data_remaining = 0;
queue->ddgst_remaining = 0;
@ -1861,8 +1930,13 @@ static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new)
}
if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) {
/* state change failure is ok if we're in DELETING state */
/*
* state change failure is ok if we're in DELETING state,
* unless we're during creation of a new controller to
* avoid races with teardown flow.
*/
WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING);
WARN_ON_ONCE(new);
ret = -EINVAL;
goto destroy_io;
}
@ -2359,8 +2433,6 @@ static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev,
dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n",
ctrl->ctrl.opts->subsysnqn, &ctrl->addr);
nvme_get_ctrl(&ctrl->ctrl);
mutex_lock(&nvme_tcp_ctrl_mutex);
list_add_tail(&ctrl->list, &nvme_tcp_ctrl_list);
mutex_unlock(&nvme_tcp_ctrl_mutex);

34
drivers/nvme/target/admin-cmd.c
Просмотреть файл

@ -322,12 +322,25 @@ static void nvmet_execute_get_log_page(struct nvmet_req *req)
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;
u16 status = 0;
const char model[] = "Linux";
id = kzalloc(sizeof(*id), GFP_KERNEL);
if (!id) {
@ -342,7 +355,7 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
memset(id->sn, ' ', sizeof(id->sn));
bin2hex(id->sn, &ctrl->subsys->serial,
min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' ');
nvmet_id_set_model_number(id, ctrl->subsys);
memcpy_and_pad(id->fr, sizeof(id->fr),
UTS_RELEASE, strlen(UTS_RELEASE), ' ');
@ -356,8 +369,12 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
/* we support multiple ports, multiples hosts and ANA: */
id->cmic = (1 << 0) | (1 << 1) | (1 << 3);
/* no limit on data transfer sizes for now */
id->mdts = 0;
/* 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);
@ -720,13 +737,22 @@ static 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_data_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;

146
drivers/nvme/target/configfs.c
Просмотреть файл

@ -395,14 +395,12 @@ static ssize_t nvmet_ns_device_uuid_store(struct config_item *item,
struct nvmet_subsys *subsys = ns->subsys;
int ret = 0;
mutex_lock(&subsys->lock);
if (ns->enabled) {
ret = -EBUSY;
goto out_unlock;
}
if (uuid_parse(page, &ns->uuid))
ret = -EINVAL;
@ -815,10 +813,10 @@ static ssize_t nvmet_subsys_attr_version_show(struct config_item *item,
(int)NVME_MAJOR(subsys->ver),
(int)NVME_MINOR(subsys->ver),
(int)NVME_TERTIARY(subsys->ver));
else
return snprintf(page, PAGE_SIZE, "%d.%d\n",
(int)NVME_MAJOR(subsys->ver),
(int)NVME_MINOR(subsys->ver));
return snprintf(page, PAGE_SIZE, "%d.%d\n",
(int)NVME_MAJOR(subsys->ver),
(int)NVME_MINOR(subsys->ver));
}
static ssize_t nvmet_subsys_attr_version_store(struct config_item *item,
@ -828,7 +826,6 @@ static ssize_t nvmet_subsys_attr_version_store(struct config_item *item,
int major, minor, tertiary = 0;
int ret;
ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary);
if (ret != 2 && ret != 3)
return -EINVAL;
@ -852,20 +849,151 @@ static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item,
static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item);
u64 serial;
if (sscanf(page, "%llx\n", &serial) != 1)
return -EINVAL;
down_write(&nvmet_config_sem);
sscanf(page, "%llx\n", &subsys->serial);
to_subsys(item)->serial = serial;
up_write(&nvmet_config_sem);
return count;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_serial);
static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_min);
}
static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item,
const char *page, size_t cnt)
{
u16 cntlid_min;
if (sscanf(page, "%hu\n", &cntlid_min) != 1)
return -EINVAL;
if (cntlid_min == 0)
return -EINVAL;
down_write(&nvmet_config_sem);
if (cntlid_min >= to_subsys(item)->cntlid_max)
goto out_unlock;
to_subsys(item)->cntlid_min = cntlid_min;
up_write(&nvmet_config_sem);
return cnt;
out_unlock:
up_write(&nvmet_config_sem);
return -EINVAL;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min);
static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_max);
}
static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item,
const char *page, size_t cnt)
{
u16 cntlid_max;
if (sscanf(page, "%hu\n", &cntlid_max) != 1)
return -EINVAL;
if (cntlid_max == 0)
return -EINVAL;
down_write(&nvmet_config_sem);
if (cntlid_max <= to_subsys(item)->cntlid_min)
goto out_unlock;
to_subsys(item)->cntlid_max = cntlid_max;
up_write(&nvmet_config_sem);
return cnt;
out_unlock:
up_write(&nvmet_config_sem);
return -EINVAL;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max);
static ssize_t nvmet_subsys_attr_model_show(struct config_item *item,
char *page)
{
struct nvmet_subsys *subsys = to_subsys(item);
struct nvmet_subsys_model *subsys_model;
char *model = NVMET_DEFAULT_CTRL_MODEL;
int ret;
rcu_read_lock();
subsys_model = rcu_dereference(subsys->model);
if (subsys_model)
model = subsys_model->number;
ret = snprintf(page, PAGE_SIZE, "%s\n", model);
rcu_read_unlock();
return ret;
}
/* See Section 1.5 of NVMe 1.4 */
static bool nvmet_is_ascii(const char c)
{
return c >= 0x20 && c <= 0x7e;
}
static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_subsys *subsys = to_subsys(item);
struct nvmet_subsys_model *new_model;
char *new_model_number;
int pos = 0, len;
len = strcspn(page, "\n");
if (!len)
return -EINVAL;
for (pos = 0; pos < len; pos++) {
if (!nvmet_is_ascii(page[pos]))
return -EINVAL;
}
new_model_number = kstrndup(page, len, GFP_KERNEL);
if (!new_model_number)
return -ENOMEM;
new_model = kzalloc(sizeof(*new_model) + len + 1, GFP_KERNEL);
if (!new_model) {
kfree(new_model_number);
return -ENOMEM;
}
memcpy(new_model->number, new_model_number, len);
down_write(&nvmet_config_sem);
mutex_lock(&subsys->lock);
new_model = rcu_replace_pointer(subsys->model, new_model,
mutex_is_locked(&subsys->lock));
mutex_unlock(&subsys->lock);
up_write(&nvmet_config_sem);
kfree_rcu(new_model, rcuhead);
return count;
}
CONFIGFS_ATTR(nvmet_subsys_, attr_model);
static struct configfs_attribute *nvmet_subsys_attrs[] = {
&nvmet_subsys_attr_attr_allow_any_host,
&nvmet_subsys_attr_attr_version,
&nvmet_subsys_attr_attr_serial,
&nvmet_subsys_attr_attr_cntlid_min,
&nvmet_subsys_attr_attr_cntlid_max,
&nvmet_subsys_attr_attr_model,
NULL,
};

9
drivers/nvme/target/core.c
Просмотреть файл

@ -1289,8 +1289,11 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
if (!ctrl->sqs)
goto out_free_cqs;
if (subsys->cntlid_min > subsys->cntlid_max)
goto out_free_cqs;
ret = ida_simple_get(&cntlid_ida,
NVME_CNTLID_MIN, NVME_CNTLID_MAX,
subsys->cntlid_min, subsys->cntlid_max,
GFP_KERNEL);
if (ret < 0) {
status = NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
@ -1438,7 +1441,8 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
kfree(subsys);
return ERR_PTR(-ENOMEM);
}
subsys->cntlid_min = NVME_CNTLID_MIN;
subsys->cntlid_max = NVME_CNTLID_MAX;
kref_init(&subsys->ref);
mutex_init(&subsys->lock);
@ -1457,6 +1461,7 @@ static void nvmet_subsys_free(struct kref *ref)
WARN_ON_ONCE(!list_empty(&subsys->namespaces));
kfree(subsys->subsysnqn);
kfree_rcu(subsys->model, rcuhead);
kfree(subsys);
}

3
drivers/nvme/target/loop.c
Просмотреть файл

@ -485,7 +485,6 @@ out_destroy_admin:
out_disable:
dev_warn(ctrl->ctrl.device, "Removing after reset failure\n");
nvme_uninit_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
}
static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
@ -618,8 +617,6 @@ static struct nvme_ctrl *nvme_loop_create_ctrl(struct device *dev,
dev_info(ctrl->ctrl.device,
"new ctrl: \"%s\"\n", ctrl->ctrl.opts->subsysnqn);
nvme_get_ctrl(&ctrl->ctrl);
changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
WARN_ON_ONCE(!changed);

11
drivers/nvme/target/nvmet.h
Просмотреть файл

@ -23,6 +23,7 @@
#define NVMET_ASYNC_EVENTS 4
#define NVMET_ERROR_LOG_SLOTS 128
#define NVMET_NO_ERROR_LOC ((u16)-1)
#define NVMET_DEFAULT_CTRL_MODEL "Linux"
/*
* Supported optional AENs:
@ -202,6 +203,11 @@ struct nvmet_ctrl {
struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS];
};
struct nvmet_subsys_model {
struct rcu_head rcuhead;
char number[];
};
struct nvmet_subsys {
enum nvme_subsys_type type;
@ -211,6 +217,8 @@ struct nvmet_subsys {
struct list_head namespaces;
unsigned int nr_namespaces;
unsigned int max_nsid;
u16 cntlid_min;
u16 cntlid_max;
struct list_head ctrls;
@ -227,6 +235,8 @@ struct nvmet_subsys {
struct config_group namespaces_group;
struct config_group allowed_hosts_group;
struct nvmet_subsys_model __rcu *model;
};
static inline struct nvmet_subsys *to_subsys(struct config_item *item)
@ -279,6 +289,7 @@ struct nvmet_fabrics_ops {
struct nvmet_port *port, char *traddr);
u16 (*install_queue)(struct nvmet_sq *nvme_sq);
void (*discovery_chg)(struct nvmet_port *port);
u8 (*get_mdts)(const struct nvmet_ctrl *ctrl);
};
#define NVMET_MAX_INLINE_BIOVEC 8

15
drivers/nvme/target/rdma.c
Просмотреть файл

@ -31,6 +31,9 @@
#define NVMET_RDMA_MAX_INLINE_SGE 4
#define NVMET_RDMA_MAX_INLINE_DATA_SIZE max_t(int, SZ_16K, PAGE_SIZE)
/* Assume mpsmin == device_page_size == 4KB */
#define NVMET_RDMA_MAX_MDTS 8
struct nvmet_rdma_cmd {
struct ib_sge sge[NVMET_RDMA_MAX_INLINE_SGE + 1];
struct ib_cqe cqe;
@ -975,7 +978,7 @@ static int nvmet_rdma_create_queue_ib(struct nvmet_rdma_queue *queue)
{
struct ib_qp_init_attr qp_attr;
struct nvmet_rdma_device *ndev = queue->dev;
int comp_vector, nr_cqe, ret, i;
int comp_vector, nr_cqe, ret, i, factor;
/*
* Spread the io queues across completion vectors,
@ -1008,7 +1011,9 @@ static int nvmet_rdma_create_queue_ib(struct nvmet_rdma_queue *queue)
qp_attr.qp_type = IB_QPT_RC;
/* +1 for drain */
qp_attr.cap.max_send_wr = queue->send_queue_size + 1;
qp_attr.cap.max_rdma_ctxs = queue->send_queue_size;
factor = rdma_rw_mr_factor(ndev->device, queue->cm_id->port_num,
1 << NVMET_RDMA_MAX_MDTS);
qp_attr.cap.max_rdma_ctxs = queue->send_queue_size * factor;
qp_attr.cap.max_send_sge = max(ndev->device->attrs.max_sge_rd,
ndev->device->attrs.max_send_sge);
@ -1602,6 +1607,11 @@ static void nvmet_rdma_disc_port_addr(struct nvmet_req *req,
}
}
static u8 nvmet_rdma_get_mdts(const struct nvmet_ctrl *ctrl)
{
return NVMET_RDMA_MAX_MDTS;
}
static const struct nvmet_fabrics_ops nvmet_rdma_ops = {
.owner = THIS_MODULE,
.type = NVMF_TRTYPE_RDMA,
@ -1612,6 +1622,7 @@ static const struct nvmet_fabrics_ops nvmet_rdma_ops = {
.queue_response = nvmet_rdma_queue_response,
.delete_ctrl = nvmet_rdma_delete_ctrl,
.disc_traddr = nvmet_rdma_disc_port_addr,
.get_mdts = nvmet_rdma_get_mdts,
};
static void nvmet_rdma_remove_one(struct ib_device *ib_device, void *client_data)

35
drivers/nvme/target/tcp.c
Просмотреть файл

@ -19,6 +19,16 @@
#define NVMET_TCP_DEF_INLINE_DATA_SIZE (4 * PAGE_SIZE)
/* Define the socket priority to use for connections were it is desirable
* that the NIC consider performing optimized packet processing or filtering.
* A non-zero value being sufficient to indicate general consideration of any
* possible optimization. Making it a module param allows for alternative
* values that may be unique for some NIC implementations.
*/
static int so_priority;
module_param(so_priority, int, 0644);
MODULE_PARM_DESC(so_priority, "nvmet tcp socket optimize priority");
#define NVMET_TCP_RECV_BUDGET 8
#define NVMET_TCP_SEND_BUDGET 8
#define NVMET_TCP_IO_WORK_BUDGET 64
@ -616,7 +626,7 @@ static int nvmet_try_send_r2t(struct nvmet_tcp_cmd *cmd, bool last_in_batch)
return 1;
}
static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd)
static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd, bool last_in_batch)
{
struct nvmet_tcp_queue *queue = cmd->queue;
struct msghdr msg = { .msg_flags = MSG_DONTWAIT };
@ -626,6 +636,9 @@ static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd)
};
int ret;
if (!last_in_batch && cmd->queue->send_list_len)
msg.msg_flags |= MSG_MORE;
ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len);
if (unlikely(ret <= 0))
return ret;
@ -666,7 +679,7 @@ static int nvmet_tcp_try_send_one(struct nvmet_tcp_queue *queue,
}
if (cmd->state == NVMET_TCP_SEND_DDGST) {
ret = nvmet_try_send_ddgst(cmd);
ret = nvmet_try_send_ddgst(cmd, last_in_batch);
if (ret <= 0)
goto done_send;
}
@ -788,7 +801,7 @@ static int nvmet_tcp_handle_icreq(struct nvmet_tcp_queue *queue)
icresp->hdr.pdo = 0;
icresp->hdr.plen = cpu_to_le32(icresp->hdr.hlen);
icresp->pfv = cpu_to_le16(NVME_TCP_PFV_1_0);
icresp->maxdata = cpu_to_le32(0xffff); /* FIXME: support r2t */
icresp->maxdata = cpu_to_le32(0x400000); /* 16M arbitrary limit */
icresp->cpda = 0;
if (queue->hdr_digest)
icresp->digest |= NVME_TCP_HDR_DIGEST_ENABLE;
@ -1433,6 +1446,13 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
if (ret)
return ret;
if (so_priority > 0) {
ret = kernel_setsockopt(sock, SOL_SOCKET, SO_PRIORITY,
(char *)&so_priority, sizeof(so_priority));
if (ret)
return ret;
}
/* Set socket type of service */
if (inet->rcv_tos > 0) {
int tos = inet->rcv_tos;
@ -1622,6 +1642,15 @@ static int nvmet_tcp_add_port(struct nvmet_port *nport)
goto err_sock;
}
if (so_priority > 0) {
ret = kernel_setsockopt(port->sock, SOL_SOCKET, SO_PRIORITY,
(char *)&so_priority, sizeof(so_priority));
if (ret) {
pr_err("failed to set SO_PRIORITY sock opt %d\n", ret);
goto err_sock;
}
}
ret = kernel_bind(port->sock, (struct sockaddr *)&port->addr,
sizeof(port->addr));
if (ret) {