diff options
Diffstat (limited to 'arch/i386/kernel/cpu/mtrr/if.c')
| -rw-r--r-- | arch/i386/kernel/cpu/mtrr/if.c | 119 |
1 files changed, 74 insertions, 45 deletions
diff --git a/arch/i386/kernel/cpu/mtrr/if.c b/arch/i386/kernel/cpu/mtrr/if.c index 1923e0aed26a..cf39e205d33c 100644 --- a/arch/i386/kernel/cpu/mtrr/if.c +++ b/arch/i386/kernel/cpu/mtrr/if.c @@ -149,60 +149,89 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) return -EINVAL; } -static int -mtrr_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long __arg) +static long +mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) { - int err; + int err = 0; mtrr_type type; struct mtrr_sentry sentry; struct mtrr_gentry gentry; void __user *arg = (void __user *) __arg; switch (cmd) { + case MTRRIOC_ADD_ENTRY: + case MTRRIOC_SET_ENTRY: + case MTRRIOC_DEL_ENTRY: + case MTRRIOC_KILL_ENTRY: + case MTRRIOC_ADD_PAGE_ENTRY: + case MTRRIOC_SET_PAGE_ENTRY: + case MTRRIOC_DEL_PAGE_ENTRY: + case MTRRIOC_KILL_PAGE_ENTRY: + if (copy_from_user(&sentry, arg, sizeof sentry)) + return -EFAULT; + break; + case MTRRIOC_GET_ENTRY: + case MTRRIOC_GET_PAGE_ENTRY: + if (copy_from_user(&gentry, arg, sizeof gentry)) + return -EFAULT; + break; +#ifdef CONFIG_COMPAT + case MTRRIOC32_ADD_ENTRY: + case MTRRIOC32_SET_ENTRY: + case MTRRIOC32_DEL_ENTRY: + case MTRRIOC32_KILL_ENTRY: + case MTRRIOC32_ADD_PAGE_ENTRY: + case MTRRIOC32_SET_PAGE_ENTRY: + case MTRRIOC32_DEL_PAGE_ENTRY: + case MTRRIOC32_KILL_PAGE_ENTRY: { + struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)__arg; + err = get_user(sentry.base, &s32->base); + err |= get_user(sentry.size, &s32->size); + err |= get_user(sentry.type, &s32->type); + if (err) + return err; + break; + } + case MTRRIOC32_GET_ENTRY: + case MTRRIOC32_GET_PAGE_ENTRY: { + struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg; + err = get_user(gentry.regnum, &g32->regnum); + err |= get_user(gentry.base, &g32->base); + err |= get_user(gentry.size, &g32->size); + err |= get_user(gentry.type, &g32->type); + if (err) + return err; + break; + } +#endif + } + + switch (cmd) { default: return -ENOTTY; case MTRRIOC_ADD_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_file_add(sentry.base, sentry.size, sentry.type, 1, file, 0); - if (err < 0) - return err; break; case MTRRIOC_SET_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_add(sentry.base, sentry.size, sentry.type, 0); - if (err < 0) - return err; break; case MTRRIOC_DEL_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_file_del(sentry.base, sentry.size, file, 0); - if (err < 0) - return err; break; case MTRRIOC_KILL_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_del(-1, sentry.base, sentry.size); - if (err < 0) - return err; break; case MTRRIOC_GET_ENTRY: - if (copy_from_user(&gentry, arg, sizeof gentry)) - return -EFAULT; if (gentry.regnum >= num_var_ranges) return -EINVAL; mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type); @@ -217,60 +246,59 @@ mtrr_ioctl(struct inode *inode, struct file *file, gentry.type = type; } - if (copy_to_user(arg, &gentry, sizeof gentry)) - return -EFAULT; break; case MTRRIOC_ADD_PAGE_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_file_add(sentry.base, sentry.size, sentry.type, 1, file, 1); - if (err < 0) - return err; break; case MTRRIOC_SET_PAGE_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_add_page(sentry.base, sentry.size, sentry.type, 0); - if (err < 0) - return err; break; case MTRRIOC_DEL_PAGE_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_file_del(sentry.base, sentry.size, file, 1); - if (err < 0) - return err; break; case MTRRIOC_KILL_PAGE_ENTRY: if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&sentry, arg, sizeof sentry)) - return -EFAULT; err = mtrr_del_page(-1, sentry.base, sentry.size); - if (err < 0) - return err; break; case MTRRIOC_GET_PAGE_ENTRY: - if (copy_from_user(&gentry, arg, sizeof gentry)) - return -EFAULT; if (gentry.regnum >= num_var_ranges) return -EINVAL; mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type); gentry.type = type; + break; + } + + if (err) + return err; + switch(cmd) { + case MTRRIOC_GET_ENTRY: + case MTRRIOC_GET_PAGE_ENTRY: if (copy_to_user(arg, &gentry, sizeof gentry)) - return -EFAULT; + err = -EFAULT; + break; +#ifdef CONFIG_COMPAT + case MTRRIOC32_GET_ENTRY: + case MTRRIOC32_GET_PAGE_ENTRY: { + struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg; + err = put_user(gentry.base, &g32->base); + err |= put_user(gentry.size, &g32->size); + err |= put_user(gentry.regnum, &g32->regnum); + err |= put_user(gentry.type, &g32->type); break; } - return 0; +#endif + } + return err; } static int @@ -310,7 +338,8 @@ static struct file_operations mtrr_fops = { .read = seq_read, .llseek = seq_lseek, .write = mtrr_write, - .ioctl = mtrr_ioctl, + .unlocked_ioctl = mtrr_ioctl, + .compat_ioctl = mtrr_ioctl, .release = mtrr_close, }; 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