[PATCH 21/30] nvme: replace the fmode_t argument to the nvme ioctl handlers with a simple bool

Christoph Hellwig
2023-06-08T11:06:28Z

Instead of passing a fmode_t and only checking it fo0r FMODE_WRITE, pass
a bool open_for_write to prepare for callers that won't have the fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christian Brauner <brauner@kernel.org>
---
drivers/nvme/host/ioctl.c | 62 +++++++++++++++++++++------------------
1 file changed, 34 insertions(+), 28 deletions(-)

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 81c5c9e3847747..8bf09047348ee9 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -14,7 +14,7 @@ enum {
};

static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
- unsigned int flags, fmode_t mode)
+ unsigned int flags, bool open_for_write)
{
u32 effects;

@@ -80,7 +80,7 @@ static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
* writing.
*/
if (nvme_is_write(c) || (effects & NVME_CMD_EFFECTS_LBCC))
- return mode & FMODE_WRITE;
+ return open_for_write;
return true;
}

@@ -337,7 +337,7 @@ static bool nvme_validate_passthru_nsid(struct nvme_ctrl *ctrl,

static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd __user *ucmd, unsigned int flags,
- fmode_t mode)
+ bool open_for_write)
{
struct nvme_passthru_cmd cmd;
struct nvme_command c;
@@ -365,7 +365,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);

- if (!nvme_cmd_allowed(ns, &c, 0, mode))
+ if (!nvme_cmd_allowed(ns, &c, 0, open_for_write))
return -EACCES;

if (cmd.timeout_ms)
@@ -385,7 +385,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,

static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd64 __user *ucmd, unsigned int flags,
- fmode_t mode)
+ bool open_for_write)
{
struct nvme_passthru_cmd64 cmd;
struct nvme_command c;
@@ -412,7 +412,7 @@ static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
c.common.cdw14 = cpu_to_le32(cmd.cdw14);
c.common.cdw15 = cpu_to_le32(cmd.cdw15);

- if (!nvme_cmd_allowed(ns, &c, flags, mode))
+ if (!nvme_cmd_allowed(ns, &c, flags, open_for_write))
return -EACCES;

if (cmd.timeout_ms)
@@ -583,7 +583,7 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
c.common.cdw14 = cpu_to_le32(READ_ONCE(cmd->cdw14));
c.common.cdw15 = cpu_to_le32(READ_ONCE(cmd->cdw15));

- if (!nvme_cmd_allowed(ns, &c, 0, ioucmd->file->f_mode))
+ if (!nvme_cmd_allowed(ns, &c, 0, ioucmd->file->f_mode & FMODE_WRITE))
return -EACCES;

d.metadata = READ_ONCE(cmd->metadata);
@@ -649,13 +649,13 @@ static bool is_ctrl_ioctl(unsigned int cmd)
}

static int nvme_ctrl_ioctl(struct nvme_ctrl *ctrl, unsigned int cmd,
- void __user *argp, fmode_t mode)
+ void __user *argp, bool open_for_write)
{
switch (cmd) {
case NVME_IOCTL_ADMIN_CMD:
- return nvme_user_cmd(ctrl, NULL, argp, 0, mode);
+ return nvme_user_cmd(ctrl, NULL, argp, 0, open_for_write);
case NVME_IOCTL_ADMIN64_CMD:
- return nvme_user_cmd64(ctrl, NULL, argp, 0, mode);
+ return nvme_user_cmd64(ctrl, NULL, argp, 0, open_for_write);
default:
return sed_ioctl(ctrl->opal_dev, cmd, argp);
}
@@ -680,14 +680,14 @@ struct nvme_user_io32 {
#endif /* COMPAT_FOR_U64_ALIGNMENT */

static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
- void __user *argp, unsigned int flags, fmode_t mode)
+ void __user *argp, unsigned int flags, bool open_for_write)
{
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, flags, mode);
+ return nvme_user_cmd(ns->ctrl, ns, argp, flags, open_for_write);
/*
* 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
@@ -702,7 +702,8 @@ static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
flags |= NVME_IOCTL_VEC;
fallthrough;
case NVME_IOCTL_IO64_CMD:
- return nvme_user_cmd64(ns->ctrl, ns, argp, flags, mode);
+ return nvme_user_cmd64(ns->ctrl, ns, argp, flags,
+ open_for_write);
default:
return -ENOTTY;
}
@@ -712,6 +713,7 @@ 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;
+ bool open_for_write = mode & FMODE_WRITE;
void __user *argp = (void __user *)arg;
unsigned int flags = 0;

@@ -719,19 +721,20 @@ int nvme_ioctl(struct block_device *bdev, fmode_t mode,
flags |= NVME_IOCTL_PARTITION;

if (is_ctrl_ioctl(cmd))
- return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, mode);
- return nvme_ns_ioctl(ns, cmd, argp, flags, mode);
+ return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
+ return nvme_ns_ioctl(ns, cmd, argp, flags, open_for_write);
}

long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct nvme_ns *ns =
container_of(file_inode(file)->i_cdev, struct nvme_ns, cdev);
+ bool open_for_write = file->f_mode & FMODE_WRITE;
void __user *argp = (void __user *)arg;

if (is_ctrl_ioctl(cmd))
- return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, file->f_mode);
- return nvme_ns_ioctl(ns, cmd, argp, 0, file->f_mode);
+ return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
+ return nvme_ns_ioctl(ns, cmd, argp, 0, open_for_write);
}

static int nvme_uring_cmd_checks(unsigned int issue_flags)
@@ -800,7 +803,7 @@ int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
#ifdef CONFIG_NVME_MULTIPATH
static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
void __user *argp, struct nvme_ns_head *head, int srcu_idx,
- fmode_t mode)
+ bool open_for_write)
__releases(&head->srcu)
{
struct nvme_ctrl *ctrl = ns->ctrl;
@@ -808,7 +811,7 @@ static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,

nvme_get_ctrl(ns->ctrl);
srcu_read_unlock(&head->srcu, srcu_idx);
- ret = nvme_ctrl_ioctl(ns->ctrl, cmd, argp, mode);
+ ret = nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);

nvme_put_ctrl(ctrl);
return ret;
@@ -818,6 +821,7 @@ 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;
+ bool open_for_write = mode & FMODE_WRITE;
void __user *argp = (void __user *)arg;
struct nvme_ns *ns;
int srcu_idx, ret = -EWOULDBLOCK;
@@ -838,9 +842,9 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
*/
if (is_ctrl_ioctl(cmd))
return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
- mode);
+ open_for_write);

- ret = nvme_ns_ioctl(ns, cmd, argp, flags, mode);
+ ret = nvme_ns_ioctl(ns, cmd, argp, flags, open_for_write);
out_unlock:
srcu_read_unlock(&head->srcu, srcu_idx);
return ret;
@@ -849,6 +853,7 @@ int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode,
long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
+ bool open_for_write = file->f_mode & FMODE_WRITE;
struct cdev *cdev = file_inode(file)->i_cdev;
struct nvme_ns_head *head =
container_of(cdev, struct nvme_ns_head, cdev);
@@ -863,9 +868,9 @@ long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,

if (is_ctrl_ioctl(cmd))
return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
- file->f_mode);
+ open_for_write);

- ret = nvme_ns_ioctl(ns, cmd, argp, 0, file->f_mode);
+ ret = nvme_ns_ioctl(ns, cmd, argp, 0, open_for_write);
out_unlock:
srcu_read_unlock(&head->srcu, srcu_idx);
return ret;
@@ -940,7 +945,7 @@ int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags)
}

static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
- fmode_t mode)
+ bool open_for_write)
{
struct nvme_ns *ns;
int ret;
@@ -964,7 +969,7 @@ static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
kref_get(&ns->kref);
up_read(&ctrl->namespaces_rwsem);

- ret = nvme_user_cmd(ctrl, ns, argp, 0, mode);
+ ret = nvme_user_cmd(ctrl, ns, argp, 0, open_for_write);
nvme_put_ns(ns);
return ret;

@@ -976,16 +981,17 @@ static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
long nvme_dev_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
+ bool open_for_write = file->f_mode & FMODE_WRITE;
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, 0, file->f_mode);
+ return nvme_user_cmd(ctrl, NULL, argp, 0, open_for_write);
case NVME_IOCTL_ADMIN64_CMD:
- return nvme_user_cmd64(ctrl, NULL, argp, 0, file->f_mode);
+ return nvme_user_cmd64(ctrl, NULL, argp, 0, open_for_write);
case NVME_IOCTL_IO_CMD:
- return nvme_dev_user_cmd(ctrl, argp, file->f_mode);
+ return nvme_dev_user_cmd(ctrl, argp, open_for_write);
case NVME_IOCTL_RESET:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
--
2.39.2