Every entry with ioctls implements ->proc_ioctl_buf() now and procfs copies the arguments in and out around pinning the entry, for 32-bit tasks too. Remove ->proc_ioctl() and ->proc_compat_ioctl().
Signed-off-by: Christian Brauner (Amutable) <[email protected]> --- fs/proc/generic.c | 7 ------- fs/proc/inode.c | 30 ++---------------------------- include/linux/proc_fs.h | 4 ---- 3 files changed, 2 insertions(+), 39 deletions(-) diff --git a/fs/proc/generic.c b/fs/proc/generic.c index e3ae11805c0f..b0027400ed23 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -488,13 +488,6 @@ static int pde_set_flags(struct proc_dir_entry *pde) pde->flags |= PROC_ENTRY_FULL_READS; } if (proc_ops->proc_ioctl_buf) { - if (WARN_ON_ONCE(proc_ops->proc_ioctl)) - return -EINVAL; -#ifdef CONFIG_COMPAT - /* 32-bit tasks go through the table as well */ - if (WARN_ON_ONCE(proc_ops->proc_compat_ioctl)) - return -EINVAL; -#endif /* the table says what procfs copies, see pde_ioctl_arg() */ if (WARN_ON_ONCE(!proc_ops->proc_ioctl_args || !proc_ops->proc_nr_ioctl_args)) diff --git a/fs/proc/inode.c b/fs/proc/inode.c index a7ebbe334afa..75561e3f3355 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -588,14 +588,6 @@ void proc_poll_notify(struct proc_dir_entry *pde) } EXPORT_SYMBOL_GPL(proc_poll_notify); -static long pde_ioctl(struct proc_dir_entry *pde, struct file *file, unsigned int cmd, unsigned long arg) -{ - const auto ioctl = pde->proc_ops->proc_ioctl; - if (ioctl) - return ioctl(file, cmd, arg); - return -ENOTTY; -} - /* the table lives in proc_ops, which goes away with the entry */ static bool pde_ioctl_arg(struct proc_dir_entry *pde, unsigned int cmd, struct proc_ioctl_arg *arg) @@ -652,38 +644,20 @@ static long pde_ioctl_buf(struct proc_dir_entry *pde, struct file *file, static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct proc_dir_entry *pde = PDE(file_inode(file)); - long rv; if (pde_has_proc_ioctl_buf(pde)) return pde_ioctl_buf(pde, file, cmd, (void __user *)arg, arg); - if (!pde_pin(pde)) - return -ENOTTY; - rv = pde_ioctl(pde, file, cmd, arg); - pde_unpin(pde); - return rv; -} - -#ifdef CONFIG_COMPAT -static long pde_compat_ioctl(struct proc_dir_entry *pde, struct file *file, unsigned int cmd, unsigned long arg) -{ - const auto compat_ioctl = pde->proc_ops->proc_compat_ioctl; - if (compat_ioctl) - return compat_ioctl(file, cmd, arg); return -ENOTTY; } +#ifdef CONFIG_COMPAT static long proc_reg_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct proc_dir_entry *pde = PDE(file_inode(file)); - long rv; if (pde_has_proc_ioctl_buf(pde)) return pde_ioctl_buf(pde, file, cmd, compat_ptr(arg), arg); - if (!pde_pin(pde)) - return -ENOTTY; - rv = pde_compat_ioctl(pde, file, cmd, arg); - pde_unpin(pde); - return rv; + return -ENOTTY; } #else #define proc_reg_compat_ioctl NULL diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h index 8c406f4d09a5..f1ac112aa0fc 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -90,10 +90,6 @@ struct proc_ops { * entry reports EPOLLERR | EPOLLPRI. */ __poll_t (*proc_poll)(struct file *, struct poll_table_struct *); - long (*proc_ioctl)(struct file *, unsigned int, unsigned long); -#ifdef CONFIG_COMPAT - long (*proc_compat_ioctl)(struct file *, unsigned int, unsigned long); -#endif /* * procfs pins the entry around ->proc_mmap() and wraps the * vm_operations of the mapping so that ->open(), ->fault(), -- 2.53.0
