Merge branch 'upstream'

1 files changed, 0 insertions, 726 deletions

diff --git a/drivers/block/genhd.c b/drivers/block/genhd.c
deleted file mode 100644
index 54aec4a..0000000
--- a/drivers/block/genhd.c
+++ /dev/null
@@ -1,726 +0,0 @@
-/*
- *  gendisk handling
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/genhd.h>
-#include <linux/kernel.h>
-#include <linux/blkdev.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/kmod.h>
-#include <linux/kobj_map.h>
-#include <linux/buffer_head.h>
-
-#define MAX_PROBE_HASH 255	/* random */
-
-static struct subsystem block_subsys;
-
-static DECLARE_MUTEX(block_subsys_sem);
-
-/*
- * Can be deleted altogether. Later.
- *
- */
-static struct blk_major_name {
-	struct blk_major_name *next;
-	int major;
-	char name[16];
-} *major_names[MAX_PROBE_HASH];
-
-/* index in the above - for now: assume no multimajor ranges */
-static inline int major_to_index(int major)
-{
-	return major % MAX_PROBE_HASH;
-}
-
-#ifdef CONFIG_PROC_FS
-/* get block device names in somewhat random order */
-int get_blkdev_list(char *p, int used)
-{
-	struct blk_major_name *n;
-	int i, len;
-
-	len = snprintf(p, (PAGE_SIZE-used), "\nBlock devices:\n");
-
-	down(&block_subsys_sem);
-	for (i = 0; i < ARRAY_SIZE(major_names); i++) {
-		for (n = major_names[i]; n; n = n->next) {
-			/*
-			 * If the curent string plus the 5 extra characters
-			 * in the line would run us off the page, then we're done
-			 */
-			if ((len + used + strlen(n->name) + 5) >= PAGE_SIZE)
-				goto page_full;
-			len += sprintf(p+len, "%3d %s\n",
-				       n->major, n->name);
-		}
-	}
-page_full:
-	up(&block_subsys_sem);
-
-	return len;
-}
-#endif
-
-int register_blkdev(unsigned int major, const char *name)
-{
-	struct blk_major_name **n, *p;
-	int index, ret = 0;
-
-	down(&block_subsys_sem);
-
-	/* temporary */
-	if (major == 0) {
-		for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {
-			if (major_names[index] == NULL)
-				break;
-		}
-
-		if (index == 0) {
-			printk("register_blkdev: failed to get major for %s\n",
-			       name);
-			ret = -EBUSY;
-			goto out;
-		}
-		major = index;
-		ret = major;
-	}
-
-	p = kmalloc(sizeof(struct blk_major_name), GFP_KERNEL);
-	if (p == NULL) {
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	p->major = major;
-	strlcpy(p->name, name, sizeof(p->name));
-	p->next = NULL;
-	index = major_to_index(major);
-
-	for (n = &major_names[index]; *n; n = &(*n)->next) {
-		if ((*n)->major == major)
-			break;
-	}
-	if (!*n)
-		*n = p;
-	else
-		ret = -EBUSY;
-
-	if (ret < 0) {
-		printk("register_blkdev: cannot get major %d for %s\n",
-		       major, name);
-		kfree(p);
-	}
-out:
-	up(&block_subsys_sem);
-	return ret;
-}
-
-EXPORT_SYMBOL(register_blkdev);
-
-/* todo: make void - error printk here */
-int unregister_blkdev(unsigned int major, const char *name)
-{
-	struct blk_major_name **n;
-	struct blk_major_name *p = NULL;
-	int index = major_to_index(major);
-	int ret = 0;
-
-	down(&block_subsys_sem);
-	for (n = &major_names[index]; *n; n = &(*n)->next)
-		if ((*n)->major == major)
-			break;
-	if (!*n || strcmp((*n)->name, name))
-		ret = -EINVAL;
-	else {
-		p = *n;
-		*n = p->next;
-	}
-	up(&block_subsys_sem);
-	kfree(p);
-
-	return ret;
-}
-
-EXPORT_SYMBOL(unregister_blkdev);
-
-static struct kobj_map *bdev_map;
-
-/*
- * Register device numbers dev..(dev+range-1)
- * range must be nonzero
- * The hash chain is sorted on range, so that subranges can override.
- */
-void blk_register_region(dev_t dev, unsigned long range, struct module *module,
-			 struct kobject *(*probe)(dev_t, int *, void *),
-			 int (*lock)(dev_t, void *), void *data)
-{
-	kobj_map(bdev_map, dev, range, module, probe, lock, data);
-}
-
-EXPORT_SYMBOL(blk_register_region);
-
-void blk_unregister_region(dev_t dev, unsigned long range)
-{
-	kobj_unmap(bdev_map, dev, range);
-}
-
-EXPORT_SYMBOL(blk_unregister_region);
-
-static struct kobject *exact_match(dev_t dev, int *part, void *data)
-{
-	struct gendisk *p = data;
-	return &p->kobj;
-}
-
-static int exact_lock(dev_t dev, void *data)
-{
-	struct gendisk *p = data;
-
-	if (!get_disk(p))
-		return -1;
-	return 0;
-}
-
-/**
- * add_disk - add partitioning information to kernel list
- * @disk: per-device partitioning information
- *
- * This function registers the partitioning information in @disk
- * with the kernel.
- */
-void add_disk(struct gendisk *disk)
-{
-	disk->flags |= GENHD_FL_UP;
-	blk_register_region(MKDEV(disk->major, disk->first_minor),
-			    disk->minors, NULL, exact_match, exact_lock, disk);
-	register_disk(disk);
-	blk_register_queue(disk);
-}
-
-EXPORT_SYMBOL(add_disk);
-EXPORT_SYMBOL(del_gendisk);	/* in partitions/check.c */
-
-void unlink_gendisk(struct gendisk *disk)
-{
-	blk_unregister_queue(disk);
-	blk_unregister_region(MKDEV(disk->major, disk->first_minor),
-			      disk->minors);
-}
-
-#define to_disk(obj) container_of(obj,struct gendisk,kobj)
-
-/**
- * get_gendisk - get partitioning information for a given device
- * @dev: device to get partitioning information for
- *
- * This function gets the structure containing partitioning
- * information for the given device @dev.
- */
-struct gendisk *get_gendisk(dev_t dev, int *part)
-{
-	struct kobject *kobj = kobj_lookup(bdev_map, dev, part);
-	return  kobj ? to_disk(kobj) : NULL;
-}
-
-#ifdef CONFIG_PROC_FS
-/* iterator */
-static void *part_start(struct seq_file *part, loff_t *pos)
-{
-	struct list_head *p;
-	loff_t l = *pos;
-
-	down(&block_subsys_sem);
-	list_for_each(p, &block_subsys.kset.list)
-		if (!l--)
-			return list_entry(p, struct gendisk, kobj.entry);
-	return NULL;
-}
-
-static void *part_next(struct seq_file *part, void *v, loff_t *pos)
-{
-	struct list_head *p = ((struct gendisk *)v)->kobj.entry.next;
-	++*pos;
-	return p==&block_subsys.kset.list ? NULL : 
-		list_entry(p, struct gendisk, kobj.entry);
-}
-
-static void part_stop(struct seq_file *part, void *v)
-{
-	up(&block_subsys_sem);
-}
-
-static int show_partition(struct seq_file *part, void *v)
-{
-	struct gendisk *sgp = v;
-	int n;
-	char buf[BDEVNAME_SIZE];
-
-	if (&sgp->kobj.entry == block_subsys.kset.list.next)
-		seq_puts(part, "major minor  #blocks  name\n\n");
-
-	/* Don't show non-partitionable removeable devices or empty devices */
-	if (!get_capacity(sgp) ||
-			(sgp->minors == 1 && (sgp->flags & GENHD_FL_REMOVABLE)))
-		return 0;
-	if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
-		return 0;
-
-	/* show the full disk and all non-0 size partitions of it */
-	seq_printf(part, "%4d  %4d %10llu %s\n",
-		sgp->major, sgp->first_minor,
-		(unsigned long long)get_capacity(sgp) >> 1,
-		disk_name(sgp, 0, buf));
-	for (n = 0; n < sgp->minors - 1; n++) {
-		if (!sgp->part[n])
-			continue;
-		if (sgp->part[n]->nr_sects == 0)
-			continue;
-		seq_printf(part, "%4d  %4d %10llu %s\n",
-			sgp->major, n + 1 + sgp->first_minor,
-			(unsigned long long)sgp->part[n]->nr_sects >> 1 ,
-			disk_name(sgp, n + 1, buf));
-	}
-
-	return 0;
-}
-
-struct seq_operations partitions_op = {
-	.start =part_start,
-	.next =	part_next,
-	.stop =	part_stop,
-	.show =	show_partition
-};
-#endif
-
-
-extern int blk_dev_init(void);
-
-static struct kobject *base_probe(dev_t dev, int *part, void *data)
-{
-	if (request_module("block-major-%d-%d", MAJOR(dev), MINOR(dev)) > 0)
-		/* Make old-style 2.4 aliases work */
-		request_module("block-major-%d", MAJOR(dev));
-	return NULL;
-}
-
-static int __init genhd_device_init(void)
-{
-	bdev_map = kobj_map_init(base_probe, &block_subsys_sem);
-	blk_dev_init();
-	subsystem_register(&block_subsys);
-	return 0;
-}
-
-subsys_initcall(genhd_device_init);
-
-
-
-/*
- * kobject & sysfs bindings for block devices
- */
-static ssize_t disk_attr_show(struct kobject *kobj, struct attribute *attr,
-			      char *page)
-{
-	struct gendisk *disk = to_disk(kobj);
-	struct disk_attribute *disk_attr =
-		container_of(attr,struct disk_attribute,attr);
-	ssize_t ret = -EIO;
-
-	if (disk_attr->show)
-		ret = disk_attr->show(disk,page);
-	return ret;
-}
-
-static ssize_t disk_attr_store(struct kobject * kobj, struct attribute * attr,
-			       const char *page, size_t count)
-{
-	struct gendisk *disk = to_disk(kobj);
-	struct disk_attribute *disk_attr =
-		container_of(attr,struct disk_attribute,attr);
-	ssize_t ret = 0;
-
-	if (disk_attr->store)
-		ret = disk_attr->store(disk, page, count);
-	return ret;
-}
-
-static struct sysfs_ops disk_sysfs_ops = {
-	.show	= &disk_attr_show,
-	.store	= &disk_attr_store,
-};
-
-static ssize_t disk_uevent_store(struct gendisk * disk,
-				 const char *buf, size_t count)
-{
-	kobject_hotplug(&disk->kobj, KOBJ_ADD);
-	return count;
-}
-static ssize_t disk_dev_read(struct gendisk * disk, char *page)
-{
-	dev_t base = MKDEV(disk->major, disk->first_minor); 
-	return print_dev_t(page, base);
-}
-static ssize_t disk_range_read(struct gendisk * disk, char *page)
-{
-	return sprintf(page, "%d\n", disk->minors);
-}
-static ssize_t disk_removable_read(struct gendisk * disk, char *page)
-{
-	return sprintf(page, "%d\n",
-		       (disk->flags & GENHD_FL_REMOVABLE ? 1 : 0));
-
-}
-static ssize_t disk_size_read(struct gendisk * disk, char *page)
-{
-	return sprintf(page, "%llu\n", (unsigned long long)get_capacity(disk));
-}
-
-static ssize_t disk_stats_read(struct gendisk * disk, char *page)
-{
-	preempt_disable();
-	disk_round_stats(disk);
-	preempt_enable();
-	return sprintf(page,
-		"%8u %8u %8llu %8u "
-		"%8u %8u %8llu %8u "
-		"%8u %8u %8u"
-		"\n",
-		disk_stat_read(disk, ios[0]), disk_stat_read(disk, merges[0]),
-		(unsigned long long)disk_stat_read(disk, sectors[0]),
-		jiffies_to_msecs(disk_stat_read(disk, ticks[0])),
-		disk_stat_read(disk, ios[1]), disk_stat_read(disk, merges[1]),
-		(unsigned long long)disk_stat_read(disk, sectors[1]),
-		jiffies_to_msecs(disk_stat_read(disk, ticks[1])),
-		disk->in_flight,
-		jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
-		jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
-}
-static struct disk_attribute disk_attr_uevent = {
-	.attr = {.name = "uevent", .mode = S_IWUSR },
-	.store	= disk_uevent_store
-};
-static struct disk_attribute disk_attr_dev = {
-	.attr = {.name = "dev", .mode = S_IRUGO },
-	.show	= disk_dev_read
-};
-static struct disk_attribute disk_attr_range = {
-	.attr = {.name = "range", .mode = S_IRUGO },
-	.show	= disk_range_read
-};
-static struct disk_attribute disk_attr_removable = {
-	.attr = {.name = "removable", .mode = S_IRUGO },
-	.show	= disk_removable_read
-};
-static struct disk_attribute disk_attr_size = {
-	.attr = {.name = "size", .mode = S_IRUGO },
-	.show	= disk_size_read
-};
-static struct disk_attribute disk_attr_stat = {
-	.attr = {.name = "stat", .mode = S_IRUGO },
-	.show	= disk_stats_read
-};
-
-static struct attribute * default_attrs[] = {
-	&disk_attr_uevent.attr,
-	&disk_attr_dev.attr,
-	&disk_attr_range.attr,
-	&disk_attr_removable.attr,
-	&disk_attr_size.attr,
-	&disk_attr_stat.attr,
-	NULL,
-};
-
-static void disk_release(struct kobject * kobj)
-{
-	struct gendisk *disk = to_disk(kobj);
-	kfree(disk->random);
-	kfree(disk->part);
-	free_disk_stats(disk);
-	kfree(disk);
-}
-
-static struct kobj_type ktype_block = {
-	.release	= disk_release,
-	.sysfs_ops	= &disk_sysfs_ops,
-	.default_attrs	= default_attrs,
-};
-
-extern struct kobj_type ktype_part;
-
-static int block_hotplug_filter(struct kset *kset, struct kobject *kobj)
-{
-	struct kobj_type *ktype = get_ktype(kobj);
-
-	return ((ktype == &ktype_block) || (ktype == &ktype_part));
-}
-
-static int block_hotplug(struct kset *kset, struct kobject *kobj, char **envp,
-			 int num_envp, char *buffer, int buffer_size)
-{
-	struct kobj_type *ktype = get_ktype(kobj);
-	struct device *physdev;
-	struct gendisk *disk;
-	struct hd_struct *part;
-	int length = 0;
-	int i = 0;
-
-	if (ktype == &ktype_block) {
-		disk = container_of(kobj, struct gendisk, kobj);
-		add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size,
-				    &length, "MINOR=%u", disk->first_minor);
-	} else if (ktype == &ktype_part) {
-		disk = container_of(kobj->parent, struct gendisk, kobj);
-		part = container_of(kobj, struct hd_struct, kobj);
-		add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size,
-				    &length, "MINOR=%u",
-				    disk->first_minor + part->partno);
-	} else
-		return 0;
-
-	add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, &length,
-			    "MAJOR=%u", disk->major);
-
-	/* add physical device, backing this device  */
-	physdev = disk->driverfs_dev;
-	if (physdev) {
-		char *path = kobject_get_path(&physdev->kobj, GFP_KERNEL);
-
-		add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size,
-				    &length, "PHYSDEVPATH=%s", path);
-		kfree(path);
-
-		if (physdev->bus)
-			add_hotplug_env_var(envp, num_envp, &i,
-					    buffer, buffer_size, &length,
-					    "PHYSDEVBUS=%s",
-					    physdev->bus->name);
-
-		if (physdev->driver)
-			add_hotplug_env_var(envp, num_envp, &i,
-					    buffer, buffer_size, &length,
-					    "PHYSDEVDRIVER=%s",
-					    physdev->driver->name);
-	}
-
-	/* terminate, set to next free slot, shrink available space */
-	envp[i] = NULL;
-	envp = &envp[i];
-	num_envp -= i;
-	buffer = &buffer[length];
-	buffer_size -= length;
-
-	return 0;
-}
-
-static struct kset_hotplug_ops block_hotplug_ops = {
-	.filter		= block_hotplug_filter,
-	.hotplug	= block_hotplug,
-};
-
-/* declare block_subsys. */
-static decl_subsys(block, &ktype_block, &block_hotplug_ops);
-
-
-/*
- * aggregate disk stat collector.  Uses the same stats that the sysfs
- * entries do, above, but makes them available through one seq_file.
- * Watching a few disks may be efficient through sysfs, but watching
- * all of them will be more efficient through this interface.
- *
- * The output looks suspiciously like /proc/partitions with a bunch of
- * extra fields.
- */
-
-/* iterator */
-static void *diskstats_start(struct seq_file *part, loff_t *pos)
-{
-	loff_t k = *pos;
-	struct list_head *p;
-
-	down(&block_subsys_sem);
-	list_for_each(p, &block_subsys.kset.list)
-		if (!k--)
-			return list_entry(p, struct gendisk, kobj.entry);
-	return NULL;
-}
-
-static void *diskstats_next(struct seq_file *part, void *v, loff_t *pos)
-{
-	struct list_head *p = ((struct gendisk *)v)->kobj.entry.next;
-	++*pos;
-	return p==&block_subsys.kset.list ? NULL :
-		list_entry(p, struct gendisk, kobj.entry);
-}
-
-static void diskstats_stop(struct seq_file *part, void *v)
-{
-	up(&block_subsys_sem);
-}
-
-static int diskstats_show(struct seq_file *s, void *v)
-{
-	struct gendisk *gp = v;
-	char buf[BDEVNAME_SIZE];
-	int n = 0;
-
-	/*
-	if (&sgp->kobj.entry == block_subsys.kset.list.next)
-		seq_puts(s,	"major minor name"
-				"     rio rmerge rsect ruse wio wmerge "
-				"wsect wuse running use aveq"
-				"\n\n");
-	*/
- 
-	preempt_disable();
-	disk_round_stats(gp);
-	preempt_enable();
-	seq_printf(s, "%4d %4d %s %u %u %llu %u %u %u %llu %u %u %u %u\n",
-		gp->major, n + gp->first_minor, disk_name(gp, n, buf),
-		disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
-		(unsigned long long)disk_stat_read(gp, sectors[0]),
-		jiffies_to_msecs(disk_stat_read(gp, ticks[0])),
-		disk_stat_read(gp, ios[1]), disk_stat_read(gp, merges[1]),
-		(unsigned long long)disk_stat_read(gp, sectors[1]),
-		jiffies_to_msecs(disk_stat_read(gp, ticks[1])),
-		gp->in_flight,
-		jiffies_to_msecs(disk_stat_read(gp, io_ticks)),
-		jiffies_to_msecs(disk_stat_read(gp, time_in_queue)));
-
-	/* now show all non-0 size partitions of it */
-	for (n = 0; n < gp->minors - 1; n++) {
-		struct hd_struct *hd = gp->part[n];
-
-		if (hd && hd->nr_sects)
-			seq_printf(s, "%4d %4d %s %u %u %u %u\n",
-				gp->major, n + gp->first_minor + 1,
-				disk_name(gp, n + 1, buf),
-				hd->ios[0], hd->sectors[0],
-				hd->ios[1], hd->sectors[1]);
-	}
- 
-	return 0;
-}
-
-struct seq_operations diskstats_op = {
-	.start	= diskstats_start,
-	.next	= diskstats_next,
-	.stop	= diskstats_stop,
-	.show	= diskstats_show
-};
-
-struct gendisk *alloc_disk(int minors)
-{
-	return alloc_disk_node(minors, -1);
-}
-
-struct gendisk *alloc_disk_node(int minors, int node_id)
-{
-	struct gendisk *disk;
-
-	disk = kmalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
-	if (disk) {
-		memset(disk, 0, sizeof(struct gendisk));
-		if (!init_disk_stats(disk)) {
-			kfree(disk);
-			return NULL;
-		}
-		if (minors > 1) {
-			int size = (minors - 1) * sizeof(struct hd_struct *);
-			disk->part = kmalloc_node(size, GFP_KERNEL, node_id);
-			if (!disk->part) {
-				kfree(disk);
-				return NULL;
-			}
-			memset(disk->part, 0, size);
-		}
-		disk->minors = minors;
-		kobj_set_kset_s(disk,block_subsys);
-		kobject_init(&disk->kobj);
-		rand_initialize_disk(disk);
-	}
-	return disk;
-}
-
-EXPORT_SYMBOL(alloc_disk);
-EXPORT_SYMBOL(alloc_disk_node);
-
-struct kobject *get_disk(struct gendisk *disk)
-{
-	struct module *owner;
-	struct kobject *kobj;
-
-	if (!disk->fops)
-		return NULL;
-	owner = disk->fops->owner;
-	if (owner && !try_module_get(owner))
-		return NULL;
-	kobj = kobject_get(&disk->kobj);
-	if (kobj == NULL) {
-		module_put(owner);
-		return NULL;
-	}
-	return kobj;
-
-}
-
-EXPORT_SYMBOL(get_disk);
-
-void put_disk(struct gendisk *disk)
-{
-	if (disk)
-		kobject_put(&disk->kobj);
-}
-
-EXPORT_SYMBOL(put_disk);
-
-void set_device_ro(struct block_device *bdev, int flag)
-{
-	if (bdev->bd_contains != bdev)
-		bdev->bd_part->policy = flag;
-	else
-		bdev->bd_disk->policy = flag;
-}
-
-EXPORT_SYMBOL(set_device_ro);
-
-void set_disk_ro(struct gendisk *disk, int flag)
-{
-	int i;
-	disk->policy = flag;
-	for (i = 0; i < disk->minors - 1; i++)
-		if (disk->part[i]) disk->part[i]->policy = flag;
-}
-
-EXPORT_SYMBOL(set_disk_ro);
-
-int bdev_read_only(struct block_device *bdev)
-{
-	if (!bdev)
-		return 0;
-	else if (bdev->bd_contains != bdev)
-		return bdev->bd_part->policy;
-	else
-		return bdev->bd_disk->policy;
-}
-
-EXPORT_SYMBOL(bdev_read_only);
-
-int invalidate_partition(struct gendisk *disk, int index)
-{
-	int res = 0;
-	struct block_device *bdev = bdget_disk(disk, index);
-	if (bdev) {
-		fsync_bdev(bdev);
-		res = __invalidate_device(bdev);
-		bdput(bdev);
-	}
-	return res;
-}
-
-EXPORT_SYMBOL(invalidate_partition);