From: Sasha Levin <sashal@kernel.org>
Date: Tue, 5 Nov 2019 21:09:19 -0500
Subject: Revert "nvme: allow 64-bit results in passthru commands"
Patch-mainline: Never, revert of unwanted stable backport, stable commit 0684db8ac8f5
References: bnc#1151927 5.3.9
This reverts commit 76d609da9ed1cc0dc780e2b539d7b827ce28f182.
The patch adds new functionality and shouldn't have been backported.
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/nvme/host/core.c | 108 +++++---------------------------
include/uapi/linux/nvme_ioctl.h | 23 -------
2 files changed, 16 insertions(+), 115 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 36a5ed1eacbe..3304e2c8a448 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -852,7 +852,7 @@ static void *nvme_add_user_metadata(struct bio *bio, void __user *ubuf,
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)
+ u32 meta_seed, u32 *result, unsigned timeout)
{
bool write = nvme_is_write(cmd);
struct nvme_ns *ns = q->queuedata;
@@ -893,7 +893,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
else
ret = nvme_req(req)->status;
if (result)
- *result = le64_to_cpu(nvme_req(req)->result.u64);
+ *result = le32_to_cpu(nvme_req(req)->result.u32);
if (meta && !ret && !write) {
if (copy_to_user(meta_buffer, meta, meta_len))
ret = -EFAULT;
@@ -1339,54 +1339,6 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_command c;
unsigned timeout = 0;
u32 effects;
- 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;
-
- 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);
-
- effects = nvme_passthru_start(ctrl, ns, cmd.opcode);
- status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
- (void __user *)(uintptr_t)cmd.addr, cmd.data_len,
- (void __user *)(uintptr_t)cmd.metadata,
- cmd.metadata_len, 0, &result, timeout);
- nvme_passthru_end(ctrl, effects);
-
- 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;
- u32 effects;
int status;
if (!capable(CAP_SYS_ADMIN))
@@ -1457,41 +1409,6 @@ static 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_handle_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
- void __user *argp,
- struct nvme_ns_head *head,
- int srcu_idx)
-{
- struct nvme_ctrl *ctrl = ns->ctrl;
- int ret;
-
- nvme_get_ctrl(ns->ctrl);
- nvme_put_ns_from_disk(head, srcu_idx);
-
- switch (cmd) {
- case NVME_IOCTL_ADMIN_CMD:
- ret = nvme_user_cmd(ctrl, NULL, argp);
- break;
- case NVME_IOCTL_ADMIN64_CMD:
- ret = nvme_user_cmd64(ctrl, NULL, argp);
- break;
- default:
- ret = sed_ioctl(ctrl->opal_dev, cmd, argp);
- break;
- }
- nvme_put_ctrl(ctrl);
- return ret;
-}
-
static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
@@ -1509,8 +1426,20 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
* seperately and drop the ns SRCU reference early. This avoids a
* deadlock when deleting namespaces using the passthrough interface.
*/
- if (is_ctrl_ioctl(cmd))
- return nvme_handle_ctrl_ioctl(ns, cmd, argp, head, srcu_idx);
+ if (cmd == NVME_IOCTL_ADMIN_CMD || is_sed_ioctl(cmd)) {
+ struct nvme_ctrl *ctrl = ns->ctrl;
+
+ nvme_get_ctrl(ns->ctrl);
+ nvme_put_ns_from_disk(head, srcu_idx);
+
+ if (cmd == NVME_IOCTL_ADMIN_CMD)
+ ret = nvme_user_cmd(ctrl, NULL, argp);
+ else
+ ret = sed_ioctl(ctrl->opal_dev, cmd, argp);
+
+ nvme_put_ctrl(ctrl);
+ return ret;
+ }
switch (cmd) {
case NVME_IOCTL_ID:
@@ -1523,9 +1452,6 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
case NVME_IOCTL_SUBMIT_IO:
ret = nvme_submit_io(ns, argp);
break;
- case NVME_IOCTL_IO64_CMD:
- ret = nvme_user_cmd64(ns->ctrl, ns, argp);
- break;
default:
if (ns->ndev)
ret = nvme_nvm_ioctl(ns, cmd, arg);
@@ -2900,8 +2826,6 @@ static long nvme_dev_ioctl(struct file *file, unsigned int cmd,
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:
diff --git a/include/uapi/linux/nvme_ioctl.h b/include/uapi/linux/nvme_ioctl.h
index e168dc59e9a0..1c215ea1798e 100644
--- a/include/uapi/linux/nvme_ioctl.h
+++ b/include/uapi/linux/nvme_ioctl.h
@@ -45,27 +45,6 @@ struct nvme_passthru_cmd {
__u32 result;
};
-struct nvme_passthru_cmd64 {
- __u8 opcode;
- __u8 flags;
- __u16 rsvd1;
- __u32 nsid;
- __u32 cdw2;
- __u32 cdw3;
- __u64 metadata;
- __u64 addr;
- __u32 metadata_len;
- __u32 data_len;
- __u32 cdw10;
- __u32 cdw11;
- __u32 cdw12;
- __u32 cdw13;
- __u32 cdw14;
- __u32 cdw15;
- __u32 timeout_ms;
- __u64 result;
-};
-
#define nvme_admin_cmd nvme_passthru_cmd
#define NVME_IOCTL_ID _IO('N', 0x40)
@@ -75,7 +54,5 @@ struct nvme_passthru_cmd64 {
#define NVME_IOCTL_RESET _IO('N', 0x44)
#define NVME_IOCTL_SUBSYS_RESET _IO('N', 0x45)
#define NVME_IOCTL_RESCAN _IO('N', 0x46)
-#define NVME_IOCTL_ADMIN64_CMD _IOWR('N', 0x47, struct nvme_passthru_cmd64)
-#define NVME_IOCTL_IO64_CMD _IOWR('N', 0x48, struct nvme_passthru_cmd64)
#endif /* _UAPI_LINUX_NVME_IOCTL_H */
--
2.24.0