diff options
Diffstat (limited to 'net/atm/resources.c')
-rw-r--r-- | net/atm/resources.c | 119 |
1 files changed, 38 insertions, 81 deletions
diff --git a/net/atm/resources.c b/net/atm/resources.c index 889349c6d90d..2b2d33eeaf20 100644 --- a/net/atm/resources.c +++ b/net/atm/resources.c @@ -52,10 +52,8 @@ static struct atm_dev *__alloc_atm_dev(const char *type) static struct atm_dev *__atm_dev_lookup(int number) { struct atm_dev *dev; - struct list_head *p; - list_for_each(p, &atm_devs) { - dev = list_entry(p, struct atm_dev, dev_list); + list_for_each_entry(dev, &atm_devs, dev_list) { if (dev->number == number) { atm_dev_hold(dev); return dev; @@ -193,88 +191,47 @@ static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg, return error ? -EFAULT : 0; } -int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat) +int atm_getnames(void __user *buf, int __user *iobuf_len) { - void __user *buf; - int error, len, number, size = 0; + int error, len, size = 0; struct atm_dev *dev; struct list_head *p; int *tmp_buf, *tmp_p; - int __user *sioc_len; - int __user *iobuf_len; - switch (cmd) { - case ATM_GETNAMES: - if (IS_ENABLED(CONFIG_COMPAT) && compat) { -#ifdef CONFIG_COMPAT - struct compat_atm_iobuf __user *ciobuf = arg; - compat_uptr_t cbuf; - iobuf_len = &ciobuf->length; - if (get_user(cbuf, &ciobuf->buffer)) - return -EFAULT; - buf = compat_ptr(cbuf); -#endif - } else { - struct atm_iobuf __user *iobuf = arg; - iobuf_len = &iobuf->length; - if (get_user(buf, &iobuf->buffer)) - return -EFAULT; - } - if (get_user(len, iobuf_len)) - return -EFAULT; - mutex_lock(&atm_dev_mutex); - list_for_each(p, &atm_devs) - size += sizeof(int); - if (size > len) { - mutex_unlock(&atm_dev_mutex); - return -E2BIG; - } - tmp_buf = kmalloc(size, GFP_ATOMIC); - if (!tmp_buf) { - mutex_unlock(&atm_dev_mutex); - return -ENOMEM; - } - tmp_p = tmp_buf; - list_for_each(p, &atm_devs) { - dev = list_entry(p, struct atm_dev, dev_list); - *tmp_p++ = dev->number; - } + if (get_user(len, iobuf_len)) + return -EFAULT; + mutex_lock(&atm_dev_mutex); + list_for_each(p, &atm_devs) + size += sizeof(int); + if (size > len) { mutex_unlock(&atm_dev_mutex); - error = ((copy_to_user(buf, tmp_buf, size)) || - put_user(size, iobuf_len)) - ? -EFAULT : 0; - kfree(tmp_buf); - return error; - default: - break; + return -E2BIG; } - - if (IS_ENABLED(CONFIG_COMPAT) && compat) { -#ifdef CONFIG_COMPAT - struct compat_atmif_sioc __user *csioc = arg; - compat_uptr_t carg; - - sioc_len = &csioc->length; - if (get_user(carg, &csioc->arg)) - return -EFAULT; - buf = compat_ptr(carg); - - if (get_user(len, &csioc->length)) - return -EFAULT; - if (get_user(number, &csioc->number)) - return -EFAULT; -#endif - } else { - struct atmif_sioc __user *sioc = arg; - - sioc_len = &sioc->length; - if (get_user(buf, &sioc->arg)) - return -EFAULT; - if (get_user(len, &sioc->length)) - return -EFAULT; - if (get_user(number, &sioc->number)) - return -EFAULT; + tmp_buf = kmalloc(size, GFP_ATOMIC); + if (!tmp_buf) { + mutex_unlock(&atm_dev_mutex); + return -ENOMEM; + } + tmp_p = tmp_buf; + list_for_each_entry(dev, &atm_devs, dev_list) { + *tmp_p++ = dev->number; } + mutex_unlock(&atm_dev_mutex); + error = ((copy_to_user(buf, tmp_buf, size)) || + put_user(size, iobuf_len)) + ? -EFAULT : 0; + kfree(tmp_buf); + return error; +} + +int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len, + int number, int compat) +{ + int error, len, size = 0; + struct atm_dev *dev; + + if (get_user(len, sioc_len)) + return -EFAULT; dev = try_then_request_module(atm_dev_lookup(number), "atm-device-%d", number); @@ -306,7 +263,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat) goto done; } } - /* fall through */ + fallthrough; case ATM_SETESIF: { unsigned char esi[ESI_LEN]; @@ -328,7 +285,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat) error = -EPERM; goto done; } - /* fall through */ + fallthrough; case ATM_GETSTAT: size = sizeof(struct atm_dev_stats); error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ); @@ -401,7 +358,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat) error = -EINVAL; goto done; } - /* fall through */ + fallthrough; case ATM_SETCIRANGE: case SONET_GETSTATZ: case SONET_SETDIAG: @@ -411,7 +368,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat) error = -EPERM; goto done; } - /* fall through */ + fallthrough; default: if (IS_ENABLED(CONFIG_COMPAT) && compat) { #ifdef CONFIG_COMPAT |