loop.c (754451342fc5954061ede74b0a8485ec4a4c6eaa) loop.c (5657a819a8d94426c76be04dcedfad0f64cfff00)
1/*
2 * linux/drivers/block/loop.c
3 *
4 * Written by Theodore Ts'o, 3/29/93
5 *
6 * Copyright 1993 by Theodore Ts'o. Redistribution of this file is
7 * permitted under the GNU General Public License.
8 *

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727#define LOOP_ATTR_RO(_name) \
728static ssize_t loop_attr_##_name##_show(struct loop_device *, char *); \
729static ssize_t loop_attr_do_show_##_name(struct device *d, \
730 struct device_attribute *attr, char *b) \
731{ \
732 return loop_attr_show(d, b, loop_attr_##_name##_show); \
733} \
734static struct device_attribute loop_attr_##_name = \
1/*
2 * linux/drivers/block/loop.c
3 *
4 * Written by Theodore Ts'o, 3/29/93
5 *
6 * Copyright 1993 by Theodore Ts'o. Redistribution of this file is
7 * permitted under the GNU General Public License.
8 *

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727#define LOOP_ATTR_RO(_name) \
728static ssize_t loop_attr_##_name##_show(struct loop_device *, char *); \
729static ssize_t loop_attr_do_show_##_name(struct device *d, \
730 struct device_attribute *attr, char *b) \
731{ \
732 return loop_attr_show(d, b, loop_attr_##_name##_show); \
733} \
734static struct device_attribute loop_attr_##_name = \
735 __ATTR(_name, S_IRUGO, loop_attr_do_show_##_name, NULL);
735 __ATTR(_name, 0444, loop_attr_do_show_##_name, NULL);
736
737static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf)
738{
739 ssize_t ret;
740 char *p = NULL;
741
742 spin_lock_irq(&lo->lo_lock);
743 if (lo->lo_backing_file)

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804 NULL,
805};
806
807static struct attribute_group loop_attribute_group = {
808 .name = "loop",
809 .attrs= loop_attrs,
810};
811
736
737static ssize_t loop_attr_backing_file_show(struct loop_device *lo, char *buf)
738{
739 ssize_t ret;
740 char *p = NULL;
741
742 spin_lock_irq(&lo->lo_lock);
743 if (lo->lo_backing_file)

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804 NULL,
805};
806
807static struct attribute_group loop_attribute_group = {
808 .name = "loop",
809 .attrs= loop_attrs,
810};
811
812static int loop_sysfs_init(struct loop_device *lo)
812static void loop_sysfs_init(struct loop_device *lo)
813{
813{
814 return sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj,
815 &loop_attribute_group);
814 lo->sysfs_inited = !sysfs_create_group(&disk_to_dev(lo->lo_disk)->kobj,
815 &loop_attribute_group);
816}
817
818static void loop_sysfs_exit(struct loop_device *lo)
819{
816}
817
818static void loop_sysfs_exit(struct loop_device *lo)
819{
820 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj,
821 &loop_attribute_group);
820 if (lo->sysfs_inited)
821 sysfs_remove_group(&disk_to_dev(lo->lo_disk)->kobj,
822 &loop_attribute_group);
822}
823
824static void loop_config_discard(struct loop_device *lo)
825{
826 struct file *file = lo->lo_backing_file;
827 struct inode *inode = file->f_mapping->host;
828 struct request_queue *q = lo->lo_queue;
829

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1671 .compat_ioctl = lo_compat_ioctl,
1672#endif
1673};
1674
1675/*
1676 * And now the modules code and kernel interface.
1677 */
1678static int max_loop;
823}
824
825static void loop_config_discard(struct loop_device *lo)
826{
827 struct file *file = lo->lo_backing_file;
828 struct inode *inode = file->f_mapping->host;
829 struct request_queue *q = lo->lo_queue;
830

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1672 .compat_ioctl = lo_compat_ioctl,
1673#endif
1674};
1675
1676/*
1677 * And now the modules code and kernel interface.
1678 */
1679static int max_loop;
1679module_param(max_loop, int, S_IRUGO);
1680module_param(max_loop, int, 0444);
1680MODULE_PARM_DESC(max_loop, "Maximum number of loop devices");
1681MODULE_PARM_DESC(max_loop, "Maximum number of loop devices");
1681module_param(max_part, int, S_IRUGO);
1682module_param(max_part, int, 0444);
1682MODULE_PARM_DESC(max_part, "Maximum number of partitions per loop device");
1683MODULE_LICENSE("GPL");
1684MODULE_ALIAS_BLOCKDEV_MAJOR(LOOP_MAJOR);
1685
1686int loop_register_transfer(struct loop_func_table *funcs)
1687{
1688 unsigned int n = funcs->number;
1689

--- 465 unchanged lines hidden --- 		1683MODULE_PARM_DESC(max_part, "Maximum number of partitions per loop device");
1684MODULE_LICENSE("GPL");
1685MODULE_ALIAS_BLOCKDEV_MAJOR(LOOP_MAJOR);
1686
1687int loop_register_transfer(struct loop_func_table *funcs)
1688{
1689 unsigned int n = funcs->number;
1690

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