From 0684db8ac8f5ca3d3e7b39736c23d06ec83a7933 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Tue, 5 Nov 2019 21:09:19 -0500 Subject: [PATCH] Revert "nvme: allow 64-bit results in passthru commands" This reverts commit 76d609da9ed1cc0dc780e2b539d7b827ce28f182. The patch adds new functionality and shouldn't have been backported. Signed-off-by: Sasha Levin --- 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 */ -- 2.43.0