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Commit 2405252a authored by Christoph Hellwig's avatar Christoph Hellwig
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nvme: move the ioctl code to a separate file 

Split out the ioctl code from core.c into a new file.  Also update
copyrights while we're at it.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarKeith Busch <kbusch@kernel.org>
Reviewed-by: default avatarJavier González <javier.gonz@samsung.com>
Reviewed-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
parent 3557a440
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Showing with 468 additions and 449 deletions
drivers/nvme/host/Makefile
View file @ 2405252a
......@@ -9,7 +9,7 @@ obj-$(CONFIG_NVME_RDMA) += nvme-rdma.o
obj-$(CONFIG_NVME_FC) += nvme-fc.o
obj-$(CONFIG_NVME_TCP) += nvme-tcp.o
nvme-core-y := core.o
nvme-core-y := core.o ioctl.o
nvme-core-$(CONFIG_TRACING) += trace.o
nvme-core-$(CONFIG_NVME_MULTIPATH) += multipath.o
nvme-core-$(CONFIG_NVM) += lightnvm.o
......
drivers/nvme/host/core.c
View file @ 2405252a
......@@ -112,7 +112,7 @@ static void nvme_set_queue_dying(struct nvme_ns *ns)
set_capacity_and_notify(ns->disk, 0);
}
static void nvme_queue_scan(struct nvme_ctrl *ctrl)
void nvme_queue_scan(struct nvme_ctrl *ctrl)
{
/*
* Only new queue scan work when admin and IO queues are both alive
......@@ -179,7 +179,7 @@ int nvme_reset_ctrl(struct nvme_ctrl *ctrl)
}
EXPORT_SYMBOL_GPL(nvme_reset_ctrl);
static int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
{
int ret;
......@@ -1016,40 +1016,6 @@ int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
}
EXPORT_SYMBOL_GPL(nvme_submit_sync_cmd);
static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf,
unsigned len, u32 seed, bool write)
{
struct bio_integrity_payload *bip;
int ret = -ENOMEM;
void *buf;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
goto out;
ret = -EFAULT;
if (write && copy_from_user(buf, ubuf, len))
goto out_free_meta;
bip = bio_integrity_alloc(bio, GFP_KERNEL, 1);
if (IS_ERR(bip)) {
ret = PTR_ERR(bip);
goto out_free_meta;
}
bip->bip_iter.bi_size = len;
bip->bip_iter.bi_sector = seed;
ret = bio_integrity_add_page(bio, virt_to_page(buf), len,
offset_in_page(buf));
if (ret == len)
return buf;
ret = -ENOMEM;
out_free_meta:
kfree(buf);
out:
return ERR_PTR(ret);
}
static u32 nvme_known_admin_effects(u8 opcode)
{
switch (opcode) {
......@@ -1138,66 +1104,6 @@ void nvme_execute_passthru_rq(struct request *rq)
}
EXPORT_SYMBOL_NS_GPL(nvme_execute_passthru_rq, NVME_TARGET_PASSTHRU);
static int nvme_submit_user_cmd(struct request_queue *q,
struct nvme_command *cmd, void __user *ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
u32 meta_seed, u64 *result, unsigned timeout)
{
bool write = nvme_is_write(cmd);
struct nvme_ns *ns = q->queuedata;
struct block_device *bdev = ns ? ns->disk->part0 : NULL;
struct request *req;
struct bio *bio = NULL;
void *meta = NULL;
int ret;
req = nvme_alloc_request(q, cmd, 0);
if (IS_ERR(req))
return PTR_ERR(req);
if (timeout)
req->timeout = timeout;
nvme_req(req)->flags |= NVME_REQ_USERCMD;
if (ubuffer && bufflen) {
ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen,
GFP_KERNEL);
if (ret)
goto out;
bio = req->bio;
if (bdev)
bio_set_dev(bio, bdev);
if (bdev && meta_buffer && meta_len) {
meta = nvme_add_user_metadata(bio, meta_buffer, meta_len,
meta_seed, write);
if (IS_ERR(meta)) {
ret = PTR_ERR(meta);
goto out_unmap;
}
req->cmd_flags |= REQ_INTEGRITY;
}
}
nvme_execute_passthru_rq(req);
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
else
ret = nvme_req(req)->status;
if (result)
*result = le64_to_cpu(nvme_req(req)->result.u64);
if (meta && !ret && !write) {
if (copy_to_user(meta_buffer, meta, meta_len))
ret = -EFAULT;
}
kfree(meta);
out_unmap:
if (bio)
blk_rq_unmap_user(bio);
out:
blk_mq_free_request(req);
return ret;
}
static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status)
{
struct nvme_ctrl *ctrl = rq->end_io_data;
......@@ -1542,182 +1448,6 @@ static void nvme_enable_aen(struct nvme_ctrl *ctrl)
queue_work(nvme_wq, &ctrl->async_event_work);
}
/*
* Convert integer values from ioctl structures to user pointers, silently
* ignoring the upper bits in the compat case to match behaviour of 32-bit
* kernels.
*/
static void __user *nvme_to_user_ptr(uintptr_t ptrval)
{
if (in_compat_syscall())
ptrval = (compat_uptr_t)ptrval;
return (void __user *)ptrval;
}
static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
{
struct nvme_user_io io;
struct nvme_command c;
unsigned length, meta_len;
void __user *metadata;
if (copy_from_user(&io, uio, sizeof(io)))
return -EFAULT;
if (io.flags)
return -EINVAL;
switch (io.opcode) {
case nvme_cmd_write:
case nvme_cmd_read:
case nvme_cmd_compare:
break;
default:
return -EINVAL;
}
length = (io.nblocks + 1) << ns->lba_shift;
if ((io.control & NVME_RW_PRINFO_PRACT) &&
ns->ms == sizeof(struct t10_pi_tuple)) {
/*
* Protection information is stripped/inserted by the
* controller.
*/
if (nvme_to_user_ptr(io.metadata))
return -EINVAL;
meta_len = 0;
metadata = NULL;
} else {
meta_len = (io.nblocks + 1) * ns->ms;
metadata = nvme_to_user_ptr(io.metadata);
}
if (ns->features & NVME_NS_EXT_LBAS) {
length += meta_len;
meta_len = 0;
} else if (meta_len) {
if ((io.metadata & 3) || !io.metadata)
return -EINVAL;
}
memset(&c, 0, sizeof(c));
c.rw.opcode = io.opcode;
c.rw.flags = io.flags;
c.rw.nsid = cpu_to_le32(ns->head->ns_id);
c.rw.slba = cpu_to_le64(io.slba);
c.rw.length = cpu_to_le16(io.nblocks);
c.rw.control = cpu_to_le16(io.control);
c.rw.dsmgmt = cpu_to_le32(io.dsmgmt);
c.rw.reftag = cpu_to_le32(io.reftag);
c.rw.apptag = cpu_to_le16(io.apptag);
c.rw.appmask = cpu_to_le16(io.appmask);
return nvme_submit_user_cmd(ns->queue, &c,
nvme_to_user_ptr(io.addr), length,
metadata, meta_len, lower_32_bits(io.slba), NULL, 0);
}
static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd __user *ucmd)
{
struct nvme_passthru_cmd cmd;
struct nvme_command c;
unsigned timeout = 0;
u64 result;
int status;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
return -EFAULT;
if (cmd.flags)
return -EINVAL;
if (ns && cmd.nsid != ns->head->ns_id) {
dev_err(ctrl->device,
"%s: nsid (%u) in cmd does not match nsid (%u) of namespace\n",
current->comm, cmd.nsid, ns->head->ns_id);
return -EINVAL;
}
memset(&c, 0, sizeof(c));
c.common.opcode = cmd.opcode;
c.common.flags = cmd.flags;
c.common.nsid = cpu_to_le32(cmd.nsid);
c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
c.common.cdw10 = cpu_to_le32(cmd.cdw10);
c.common.cdw11 = cpu_to_le32(cmd.cdw11);
c.common.cdw12 = cpu_to_le32(cmd.cdw12);
c.common.cdw13 = cpu_to_le32(cmd.cdw13);
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &result, timeout);
if (status >= 0) {
if (put_user(result, &ucmd->result))
return -EFAULT;
}
return status;
}
static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd64 __user *ucmd)
{
struct nvme_passthru_cmd64 cmd;
struct nvme_command c;
unsigned timeout = 0;
int status;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
return -EFAULT;
if (cmd.flags)
return -EINVAL;
if (ns && cmd.nsid != ns->head->ns_id) {
dev_err(ctrl->device,
"%s: nsid (%u) in cmd does not match nsid (%u) of namespace\n",
current->comm, cmd.nsid, ns->head->ns_id);
return -EINVAL;
}
memset(&c, 0, sizeof(c));
c.common.opcode = cmd.opcode;
c.common.flags = cmd.flags;
c.common.nsid = cpu_to_le32(cmd.nsid);
c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
c.common.cdw10 = cpu_to_le32(cmd.cdw10);
c.common.cdw11 = cpu_to_le32(cmd.cdw11);
c.common.cdw12 = cpu_to_le32(cmd.cdw12);
c.common.cdw13 = cpu_to_le32(cmd.cdw13);
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &cmd.result, timeout);
if (status >= 0) {
if (put_user(cmd.result, &ucmd->result))
return -EFAULT;
}
return status;
}
/*
* Issue ioctl requests on the first available path. Note that unlike normal
* block layer requests we will not retry failed request on another controller.
......@@ -1748,85 +1478,6 @@ void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx)
srcu_read_unlock(&head->srcu, idx);
}
static bool is_ctrl_ioctl(unsigned int cmd)
{
if (cmd == NVME_IOCTL_ADMIN_CMD || cmd == NVME_IOCTL_ADMIN64_CMD)
return true;
if (is_sed_ioctl(cmd))
return true;
return false;
}
static int nvme_ctrl_ioctl(struct nvme_ctrl *ctrl, unsigned int cmd,
void __user *argp)
{
switch (cmd) {
case NVME_IOCTL_ADMIN_CMD:
return nvme_user_cmd(ctrl, NULL, argp);
case NVME_IOCTL_ADMIN64_CMD:
return nvme_user_cmd64(ctrl, NULL, argp);
default:
return sed_ioctl(ctrl->opal_dev, cmd, argp);
}
}
#ifdef COMPAT_FOR_U64_ALIGNMENT
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)
#endif /* COMPAT_FOR_U64_ALIGNMENT */
static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
void __user *argp)
{
switch (cmd) {
case NVME_IOCTL_ID:
force_successful_syscall_return();
return ns->head->ns_id;
case NVME_IOCTL_IO_CMD:
return nvme_user_cmd(ns->ctrl, ns, argp);
/*
* struct nvme_user_io can have different padding on some 32-bit ABIs.
* Just accept the compat version as all fields that are used are the
* same size and at the same offset.
*/
#ifdef COMPAT_FOR_U64_ALIGNMENT
case NVME_IOCTL_SUBMIT_IO32:
#endif
case NVME_IOCTL_SUBMIT_IO:
return nvme_submit_io(ns, argp);
case NVME_IOCTL_IO64_CMD:
return nvme_user_cmd64(ns->ctrl, ns, argp);
default:
if (!ns->ndev)
return -ENOTTY;
return nvme_nvm_ioctl(ns, cmd, argp);
}
}
static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct nvme_ns *ns = bdev->bd_disk->private_data;
void __user *argp = (void __user *)arg;
if (is_ctrl_ioctl(cmd))
return nvme_ctrl_ioctl(ns->ctrl, cmd, argp);
return nvme_ns_ioctl(ns, cmd, argp);
}
static int nvme_open(struct block_device *bdev, fmode_t mode)
{
struct nvme_ns *ns = bdev->bd_disk->private_data;
......@@ -2336,7 +1987,7 @@ static void nvme_ns_head_release(struct gendisk *disk, fmode_t mode)
nvme_put_ns_head(disk->private_data);
}
static struct nvme_ctrl *nvme_find_get_live_ctrl(struct nvme_subsystem *subsys)
struct nvme_ctrl *nvme_find_get_live_ctrl(struct nvme_subsystem *subsys)
{
struct nvme_ctrl *ctrl;
int ret;
......@@ -2356,42 +2007,6 @@ static struct nvme_ctrl *nvme_find_get_live_ctrl(struct nvme_subsystem *subsys)
return ctrl;
}
static int nvme_ns_head_ctrl_ioctl(struct nvme_ns_head *head,
unsigned int cmd, void __user *argp)
{
struct nvme_ctrl *ctrl = nvme_find_get_live_ctrl(head->subsys);
int ret;
if (IS_ERR(ctrl))
return PTR_ERR(ctrl);
ret = nvme_ctrl_ioctl(ctrl, cmd, argp);
nvme_put_ctrl(ctrl);
return ret;
}
static int nvme_ns_head_ns_ioctl(struct nvme_ns_head *head,
unsigned int cmd, void __user *argp)
{
int srcu_idx = srcu_read_lock(&head->srcu);
struct nvme_ns *ns = nvme_find_path(head);
int ret = -EWOULDBLOCK;
if (ns)
ret = nvme_ns_ioctl(ns, cmd, argp);
srcu_read_unlock(&head->srcu, srcu_idx);
return ret;
}
static int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct nvme_ns_head *head = bdev->bd_disk->private_data;
if (is_ctrl_ioctl(cmd))
return nvme_ns_head_ctrl_ioctl(head, cmd, (void __user *)arg);
return nvme_ns_head_ns_ioctl(head, cmd, (void __user *)arg);
}
const struct block_device_operations nvme_ns_head_ops = {
.owner = THIS_MODULE,
.submit_bio = nvme_ns_head_submit_bio,
......@@ -3354,65 +2969,6 @@ static int nvme_dev_release(struct inode *inode, struct file *file)
return 0;
}
static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp)
{
struct nvme_ns *ns;
int ret;
down_read(&ctrl->namespaces_rwsem);
if (list_empty(&ctrl->namespaces)) {
ret = -ENOTTY;
goto out_unlock;
}
ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list);
if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) {
dev_warn(ctrl->device,
"NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n");
ret = -EINVAL;
goto out_unlock;
}
dev_warn(ctrl->device,
"using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n");
kref_get(&ns->kref);
up_read(&ctrl->namespaces_rwsem);
ret = nvme_user_cmd(ctrl, ns, argp);
nvme_put_ns(ns);
return ret;
out_unlock:
up_read(&ctrl->namespaces_rwsem);
return ret;
}
static long nvme_dev_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct nvme_ctrl *ctrl = file->private_data;
void __user *argp = (void __user *)arg;
switch (cmd) {
case NVME_IOCTL_ADMIN_CMD:
return nvme_user_cmd(ctrl, NULL, argp);
case NVME_IOCTL_ADMIN64_CMD:
return nvme_user_cmd64(ctrl, NULL, argp);
case NVME_IOCTL_IO_CMD:
return nvme_dev_user_cmd(ctrl, argp);
case NVME_IOCTL_RESET:
dev_warn(ctrl->device, "resetting controller\n");
return nvme_reset_ctrl_sync(ctrl);
case NVME_IOCTL_SUBSYS_RESET:
return nvme_reset_subsystem(ctrl);
case NVME_IOCTL_RESCAN:
nvme_queue_scan(ctrl);
return 0;
default:
return -ENOTTY;
}
}
static const struct file_operations nvme_dev_fops = {
.owner = THIS_MODULE,
.open = nvme_dev_open,
......
drivers/nvme/host/ioctl.c 0 → 100644
View file @ 2405252a
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2011-2014, Intel Corporation.
* Copyright (c) 2017-2021 Christoph Hellwig.
*/
#include <linux/ptrace.h> /* for force_successful_syscall_return */
#include <linux/nvme_ioctl.h>
#include "nvme.h"
/*
* Convert integer values from ioctl structures to user pointers, silently
* ignoring the upper bits in the compat case to match behaviour of 32-bit
* kernels.
*/
static void __user *nvme_to_user_ptr(uintptr_t ptrval)
{
if (in_compat_syscall())
ptrval = (compat_uptr_t)ptrval;
return (void __user *)ptrval;
}
static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf,
unsigned len, u32 seed, bool write)
{
struct bio_integrity_payload *bip;
int ret = -ENOMEM;
void *buf;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
goto out;
ret = -EFAULT;
if (write && copy_from_user(buf, ubuf, len))
goto out_free_meta;
bip = bio_integrity_alloc(bio, GFP_KERNEL, 1);
if (IS_ERR(bip)) {
ret = PTR_ERR(bip);
goto out_free_meta;
}
bip->bip_iter.bi_size = len;
bip->bip_iter.bi_sector = seed;
ret = bio_integrity_add_page(bio, virt_to_page(buf), len,
offset_in_page(buf));
if (ret == len)
return buf;
ret = -ENOMEM;
out_free_meta:
kfree(buf);
out:
return ERR_PTR(ret);
}
static int nvme_submit_user_cmd(struct request_queue *q,
struct nvme_command *cmd, void __user *ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
u32 meta_seed, u64 *result, unsigned timeout)
{
bool write = nvme_is_write(cmd);
struct nvme_ns *ns = q->queuedata;
struct block_device *bdev = ns ? ns->disk->part0 : NULL;
struct request *req;
struct bio *bio = NULL;
void *meta = NULL;
int ret;
req = nvme_alloc_request(q, cmd, 0);
if (IS_ERR(req))
return PTR_ERR(req);
if (timeout)
req->timeout = timeout;
nvme_req(req)->flags |= NVME_REQ_USERCMD;
if (ubuffer && bufflen) {
ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen,
GFP_KERNEL);
if (ret)
goto out;
bio = req->bio;
if (bdev)
bio_set_dev(bio, bdev);
if (bdev && meta_buffer && meta_len) {
meta = nvme_add_user_metadata(bio, meta_buffer, meta_len,
meta_seed, write);
if (IS_ERR(meta)) {
ret = PTR_ERR(meta);
goto out_unmap;
}
req->cmd_flags |= REQ_INTEGRITY;
}
}
nvme_execute_passthru_rq(req);
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
else
ret = nvme_req(req)->status;
if (result)
*result = le64_to_cpu(nvme_req(req)->result.u64);
if (meta && !ret && !write) {
if (copy_to_user(meta_buffer, meta, meta_len))
ret = -EFAULT;
}
kfree(meta);
out_unmap:
if (bio)
blk_rq_unmap_user(bio);
out:
blk_mq_free_request(req);
return ret;
}
static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
{
struct nvme_user_io io;
struct nvme_command c;
unsigned length, meta_len;
void __user *metadata;
if (copy_from_user(&io, uio, sizeof(io)))
return -EFAULT;
if (io.flags)
return -EINVAL;
switch (io.opcode) {
case nvme_cmd_write:
case nvme_cmd_read:
case nvme_cmd_compare:
break;
default:
return -EINVAL;
}
length = (io.nblocks + 1) << ns->lba_shift;
if ((io.control & NVME_RW_PRINFO_PRACT) &&
ns->ms == sizeof(struct t10_pi_tuple)) {
/*
* Protection information is stripped/inserted by the
* controller.
*/
if (nvme_to_user_ptr(io.metadata))
return -EINVAL;
meta_len = 0;
metadata = NULL;
} else {
meta_len = (io.nblocks + 1) * ns->ms;
metadata = nvme_to_user_ptr(io.metadata);
}
if (ns->features & NVME_NS_EXT_LBAS) {
length += meta_len;
meta_len = 0;
} else if (meta_len) {
if ((io.metadata & 3) || !io.metadata)
return -EINVAL;
}
memset(&c, 0, sizeof(c));
c.rw.opcode = io.opcode;
c.rw.flags = io.flags;
c.rw.nsid = cpu_to_le32(ns->head->ns_id);
c.rw.slba = cpu_to_le64(io.slba);
c.rw.length = cpu_to_le16(io.nblocks);
c.rw.control = cpu_to_le16(io.control);
c.rw.dsmgmt = cpu_to_le32(io.dsmgmt);
c.rw.reftag = cpu_to_le32(io.reftag);
c.rw.apptag = cpu_to_le16(io.apptag);
c.rw.appmask = cpu_to_le16(io.appmask);
return nvme_submit_user_cmd(ns->queue, &c,
nvme_to_user_ptr(io.addr), length,
metadata, meta_len, lower_32_bits(io.slba), NULL, 0);
}
static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd __user *ucmd)
{
struct nvme_passthru_cmd cmd;
struct nvme_command c;
unsigned timeout = 0;
u64 result;
int status;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
return -EFAULT;
if (cmd.flags)
return -EINVAL;
if (ns && cmd.nsid != ns->head->ns_id) {
dev_err(ctrl->device,
"%s: nsid (%u) in cmd does not match nsid (%u) of namespace\n",
current->comm, cmd.nsid, ns->head->ns_id);
return -EINVAL;
}
memset(&c, 0, sizeof(c));
c.common.opcode = cmd.opcode;
c.common.flags = cmd.flags;
c.common.nsid = cpu_to_le32(cmd.nsid);
c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
c.common.cdw10 = cpu_to_le32(cmd.cdw10);
c.common.cdw11 = cpu_to_le32(cmd.cdw11);
c.common.cdw12 = cpu_to_le32(cmd.cdw12);
c.common.cdw13 = cpu_to_le32(cmd.cdw13);
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &result, timeout);
if (status >= 0) {
if (put_user(result, &ucmd->result))
return -EFAULT;
}
return status;
}
static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd64 __user *ucmd)
{
struct nvme_passthru_cmd64 cmd;
struct nvme_command c;
unsigned timeout = 0;
int status;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
return -EFAULT;
if (cmd.flags)
return -EINVAL;
if (ns && cmd.nsid != ns->head->ns_id) {
dev_err(ctrl->device,
"%s: nsid (%u) in cmd does not match nsid (%u) of namespace\n",
current->comm, cmd.nsid, ns->head->ns_id);
return -EINVAL;
}
memset(&c, 0, sizeof(c));
c.common.opcode = cmd.opcode;
c.common.flags = cmd.flags;
c.common.nsid = cpu_to_le32(cmd.nsid);
c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
c.common.cdw10 = cpu_to_le32(cmd.cdw10);
c.common.cdw11 = cpu_to_le32(cmd.cdw11);
c.common.cdw12 = cpu_to_le32(cmd.cdw12);
c.common.cdw13 = cpu_to_le32(cmd.cdw13);
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
nvme_to_user_ptr(cmd.addr), cmd.data_len,
nvme_to_user_ptr(cmd.metadata), cmd.metadata_len,
0, &cmd.result, timeout);
if (status >= 0) {
if (put_user(cmd.result, &ucmd->result))
return -EFAULT;
}
return status;
}
static bool is_ctrl_ioctl(unsigned int cmd)
{
if (cmd == NVME_IOCTL_ADMIN_CMD || cmd == NVME_IOCTL_ADMIN64_CMD)
return true;
if (is_sed_ioctl(cmd))
return true;
return false;
}
static int nvme_ctrl_ioctl(struct nvme_ctrl *ctrl, unsigned int cmd,
void __user *argp)
{
switch (cmd) {
case NVME_IOCTL_ADMIN_CMD:
return nvme_user_cmd(ctrl, NULL, argp);
case NVME_IOCTL_ADMIN64_CMD:
return nvme_user_cmd64(ctrl, NULL, argp);
default:
return sed_ioctl(ctrl->opal_dev, cmd, argp);
}
}
#ifdef COMPAT_FOR_U64_ALIGNMENT
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)
#endif /* COMPAT_FOR_U64_ALIGNMENT */
static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
void __user *argp)
{
switch (cmd) {
case NVME_IOCTL_ID:
force_successful_syscall_return();
return ns->head->ns_id;
case NVME_IOCTL_IO_CMD:
return nvme_user_cmd(ns->ctrl, ns, argp);
/*
* struct nvme_user_io can have different padding on some 32-bit ABIs.
* Just accept the compat version as all fields that are used are the
* same size and at the same offset.
*/
#ifdef COMPAT_FOR_U64_ALIGNMENT
case NVME_IOCTL_SUBMIT_IO32:
#endif
case NVME_IOCTL_SUBMIT_IO:
return nvme_submit_io(ns, argp);
case NVME_IOCTL_IO64_CMD:
return nvme_user_cmd64(ns->ctrl, ns, argp);
default:
if (!ns->ndev)
return -ENOTTY;
return nvme_nvm_ioctl(ns, cmd, argp);
}
}
int nvme_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct nvme_ns *ns = bdev->bd_disk->private_data;
void __user *argp = (void __user *)arg;
if (is_ctrl_ioctl(cmd))
return nvme_ctrl_ioctl(ns->ctrl, cmd, argp);
return nvme_ns_ioctl(ns, cmd, argp);
}
#ifdef CONFIG_NVME_MULTIPATH
static int nvme_ns_head_ctrl_ioctl(struct nvme_ns_head *head,
unsigned int cmd, void __user *argp)
{
struct nvme_ctrl *ctrl = nvme_find_get_live_ctrl(head->subsys);
int ret;
if (IS_ERR(ctrl))
return PTR_ERR(ctrl);
ret = nvme_ctrl_ioctl(ctrl, cmd, argp);
nvme_put_ctrl(ctrl);
return ret;
}
static int nvme_ns_head_ns_ioctl(struct nvme_ns_head *head,
unsigned int cmd, void __user *argp)
{
int srcu_idx = srcu_read_lock(&head->srcu);
struct nvme_ns *ns = nvme_find_path(head);
int ret = -EWOULDBLOCK;
if (ns)
ret = nvme_ns_ioctl(ns, cmd, argp);
srcu_read_unlock(&head->srcu, srcu_idx);
return ret;
}
int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct nvme_ns_head *head = bdev->bd_disk->private_data;
if (is_ctrl_ioctl(cmd))
return nvme_ns_head_ctrl_ioctl(head, cmd, (void __user *)arg);
return nvme_ns_head_ns_ioctl(head, cmd, (void __user *)arg);
}
#endif /* CONFIG_NVME_MULTIPATH */
static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp)
{
struct nvme_ns *ns;
int ret;
down_read(&ctrl->namespaces_rwsem);
if (list_empty(&ctrl->namespaces)) {
ret = -ENOTTY;
goto out_unlock;
}
ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list);
if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) {
dev_warn(ctrl->device,
"NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n");
ret = -EINVAL;
goto out_unlock;
}
dev_warn(ctrl->device,
"using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n");
kref_get(&ns->kref);
up_read(&ctrl->namespaces_rwsem);
ret = nvme_user_cmd(ctrl, ns, argp);
nvme_put_ns(ns);
return ret;
out_unlock:
up_read(&ctrl->namespaces_rwsem);
return ret;
}
long nvme_dev_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct nvme_ctrl *ctrl = file->private_data;
void __user *argp = (void __user *)arg;
switch (cmd) {
case NVME_IOCTL_ADMIN_CMD:
return nvme_user_cmd(ctrl, NULL, argp);
case NVME_IOCTL_ADMIN64_CMD:
return nvme_user_cmd64(ctrl, NULL, argp);
case NVME_IOCTL_IO_CMD:
return nvme_dev_user_cmd(ctrl, argp);
case NVME_IOCTL_RESET:
dev_warn(ctrl->device, "resetting controller\n");
return nvme_reset_ctrl_sync(ctrl);
case NVME_IOCTL_SUBSYS_RESET:
return nvme_reset_subsystem(ctrl);
case NVME_IOCTL_RESCAN:
nvme_queue_scan(ctrl);
return 0;
default:
return -ENOTTY;
}
}
drivers/nvme/host/nvme.h
View file @ 2405252a
......@@ -647,14 +647,22 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
void nvme_queue_scan(struct nvme_ctrl *ctrl);
int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
void *log, size_t size, u64 offset);
struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
struct nvme_ns_head **head, int *srcu_idx);
void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
struct nvme_ctrl *nvme_find_get_live_ctrl(struct nvme_subsystem *subsys);
int nvme_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg);
int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg);
long nvme_dev_ioctl(struct file *file, unsigned int cmd,
unsigned long arg);
extern const struct attribute_group *nvme_ns_id_attr_groups[];
extern const struct block_device_operations nvme_ns_head_ops;
......
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