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Driver core: convert block from raw kobjects to core devices

Browse source 
This moves the block devices to /sys/class/block. It will create a
flat list of all block devices, with the disks and partitions in one
directory. For compatibility /sys/block is created and contains symlinks
to the disks.

  /sys/class/block
  |-- sda -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
  |-- sda1 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1
  |-- sda10 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda10
  |-- sda5 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5
  |-- sda6 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6
  |-- sda7 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda7
  |-- sda8 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda8
  |-- sda9 -> ../../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda9
  `-- sr0 -> ../../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0

  /sys/block/
  |-- sda -> ../devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda
  `-- sr0 -> ../devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2007-05-21 22:08:01 +02:00 committed by Greg Kroah-Hartman
parent 09f82ea928
commit edfaa7c365
13 changed files with 389 additions and 614 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

418
block/genhd.c
View file

@ -17,9 +17,10 @@
#include <linux/buffer_head.h>
#include <linux/mutex.h>
struct kset *block_kset;
static struct kset_uevent_ops block_uevent_ops;
static DEFINE_MUTEX(block_subsys_lock);
static DEFINE_MUTEX(block_class_lock);
#ifndef CONFIG_SYSFS_DEPRECATED
struct kobject *block_depr;
#endif
/*
* Can be deleted altogether. Later.
@ -38,19 +39,17 @@ static inline int major_to_index(int major)
}
#ifdef CONFIG_PROC_FS
void blkdev_show(struct seq_file *f, off_t offset)
{
struct blk_major_name *dp;
if (offset < BLKDEV_MAJOR_HASH_SIZE) {
mutex_lock(&block_subsys_lock);
mutex_lock(&block_class_lock);
for (dp = major_names[offset]; dp; dp = dp->next)
seq_printf(f, "%3d %s\n", dp->major, dp->name);
mutex_unlock(&block_subsys_lock);
mutex_unlock(&block_class_lock);
}
}
#endif /* CONFIG_PROC_FS */
int register_blkdev(unsigned int major, const char *name)
@ -58,7 +57,7 @@ int register_blkdev(unsigned int major, const char *name)
struct blk_major_name **n, *p;
int index, ret = 0;
mutex_lock(&block_subsys_lock);
mutex_lock(&block_class_lock);
/* temporary */
if (major == 0) {
@ -103,7 +102,7 @@ int register_blkdev(unsigned int major, const char *name)
kfree(p);
}
out:
mutex_unlock(&block_subsys_lock);
mutex_unlock(&block_class_lock);
return ret;
}
@ -115,7 +114,7 @@ void unregister_blkdev(unsigned int major, const char *name)
struct blk_major_name *p = NULL;
int index = major_to_index(major);
mutex_lock(&block_subsys_lock);
mutex_lock(&block_class_lock);
for (n = &major_names[index]; *n; n = &(*n)->next)
if ((*n)->major == major)
break;
@ -125,7 +124,7 @@ void unregister_blkdev(unsigned int major, const char *name)
p = *n;
*n = p->next;
}
mutex_unlock(&block_subsys_lock);
mutex_unlock(&block_class_lock);
kfree(p);
}
@ -138,29 +137,30 @@ static struct kobj_map *bdev_map;
* 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,
void blk_register_region(dev_t devt, 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);
kobj_map(bdev_map, devt, range, module, probe, lock, data);
}
EXPORT_SYMBOL(blk_register_region);
void blk_unregister_region(dev_t dev, unsigned long range)
void blk_unregister_region(dev_t devt, unsigned long range)
{
kobj_unmap(bdev_map, dev, range);
kobj_unmap(bdev_map, devt, range);
}
EXPORT_SYMBOL(blk_unregister_region);
static struct kobject *exact_match(dev_t dev, int *part, void *data)
static struct kobject *exact_match(dev_t devt, int *part, void *data)
{
struct gendisk *p = data;
return &p->kobj;
return &p->dev.kobj;
}
static int exact_lock(dev_t dev, void *data)
static int exact_lock(dev_t devt, void *data)
{
struct gendisk *p = data;
@ -195,8 +195,6 @@ void unlink_gendisk(struct gendisk *disk)
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
@ -204,10 +202,12 @@ void unlink_gendisk(struct gendisk *disk)
* This function gets the structure containing partitioning
* information for the given device @dev.
*/
struct gendisk *get_gendisk(dev_t dev, int *part)
struct gendisk *get_gendisk(dev_t devt, int *part)
{
struct kobject *kobj = kobj_lookup(bdev_map, dev, part);
return kobj ? to_disk(kobj) : NULL;
struct kobject *kobj = kobj_lookup(bdev_map, devt, part);
struct device *dev = kobj_to_dev(kobj);
return kobj ? dev_to_disk(dev) : NULL;
}
/*
@ -217,13 +217,17 @@ struct gendisk *get_gendisk(dev_t dev, int *part)
*/
void __init printk_all_partitions(void)
{
int n;
struct device *dev;
struct gendisk *sgp;
char buf[BDEVNAME_SIZE];
int n;
mutex_lock(&block_subsys_lock);
mutex_lock(&block_class_lock);
/* For each block device... */
list_for_each_entry(sgp, &block_kset->list, kobj.entry) {
char buf[BDEVNAME_SIZE];
list_for_each_entry(dev, &block_class.devices, node) {
if (dev->type != &disk_type)
continue;
sgp = dev_to_disk(dev);
/*
* Don't show empty devices or things that have been surpressed
*/
@ -256,38 +260,46 @@ void __init printk_all_partitions(void)
sgp->major, n + 1 + sgp->first_minor,
(unsigned long long)sgp->part[n]->nr_sects >> 1,
disk_name(sgp, n + 1, buf));
} /* partition subloop */
} /* Block device loop */
}
}
mutex_unlock(&block_subsys_lock);
return;
mutex_unlock(&block_class_lock);
}
#ifdef CONFIG_PROC_FS
/* iterator */
static void *part_start(struct seq_file *part, loff_t *pos)
{
struct list_head *p;
loff_t l = *pos;
loff_t k = *pos;
struct device *dev;
mutex_lock(&block_subsys_lock);
list_for_each(p, &block_kset->list)
if (!l--)
return list_entry(p, struct gendisk, kobj.entry);
mutex_lock(&block_class_lock);
list_for_each_entry(dev, &block_class.devices, node) {
if (dev->type != &disk_type)
continue;
if (!k--)
return dev_to_disk(dev);
}
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;
struct gendisk *gp = v;
struct device *dev;
++*pos;
return p==&block_kset->list ? NULL :
list_entry(p, struct gendisk, kobj.entry);
list_for_each_entry(dev, &gp->dev.node, node) {
if (&dev->node == &block_class.devices)
return NULL;
if (dev->type == &disk_type)
return dev_to_disk(dev);
}
return NULL;
}
static void part_stop(struct seq_file *part, void *v)
{
mutex_unlock(&block_subsys_lock);
mutex_unlock(&block_class_lock);
}
static int show_partition(struct seq_file *part, void *v)
@ -296,7 +308,7 @@ static int show_partition(struct seq_file *part, void *v)
int n;
char buf[BDEVNAME_SIZE];
if (&sgp->kobj.entry == block_kset->list.next)
if (&sgp->dev.node == block_class.devices.next)
seq_puts(part, "major minor #blocks name\n\n");
/* Don't show non-partitionable removeable devices or empty devices */
@ -326,109 +338,81 @@ static int show_partition(struct seq_file *part, void *v)
}
struct seq_operations partitions_op = {
.start =part_start,
.next = part_next,
.stop = part_stop,
.show = show_partition
.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)
static struct kobject *base_probe(dev_t devt, int *part, void *data)
{
if (request_module("block-major-%d-%d", MAJOR(dev), MINOR(dev)) > 0)
if (request_module("block-major-%d-%d", MAJOR(devt), MINOR(devt)) > 0)
/* Make old-style 2.4 aliases work */
request_module("block-major-%d", MAJOR(dev));
request_module("block-major-%d", MAJOR(devt));
return NULL;
}
static int __init genhd_device_init(void)
{
bdev_map = kobj_map_init(base_probe, &block_subsys_lock);
class_register(&block_class);
bdev_map = kobj_map_init(base_probe, &block_class_lock);
blk_dev_init();
block_kset = kset_create_and_add("block", &block_uevent_ops, NULL);
if (!block_kset) {
printk(KERN_WARNING "%s: kset_create error\n", __FUNCTION__);
return -ENOMEM;
}
#ifndef CONFIG_SYSFS_DEPRECATED
/* create top-level block dir */
block_depr = kobject_create_and_add("block", NULL);
#endif
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)
static ssize_t disk_range_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gendisk *disk = to_disk(kobj);
struct disk_attribute *disk_attr =
container_of(attr,struct disk_attribute,attr);
ssize_t ret = -EIO;
struct gendisk *disk = dev_to_disk(dev);
if (disk_attr->show)
ret = disk_attr->show(disk,page);
return ret;
return sprintf(buf, "%d\n", disk->minors);
}
static ssize_t disk_attr_store(struct kobject * kobj, struct attribute * attr,
const char *page, size_t count)
static ssize_t disk_removable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gendisk *disk = to_disk(kobj);
struct disk_attribute *disk_attr =
container_of(attr,struct disk_attribute,attr);
ssize_t ret = 0;
struct gendisk *disk = dev_to_disk(dev);
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_uevent(&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",
return sprintf(buf, "%d\n",
(disk->flags & GENHD_FL_REMOVABLE ? 1 : 0));
}
}
static ssize_t disk_size_read(struct gendisk * disk, char *page)
static ssize_t disk_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(page, "%llu\n", (unsigned long long)get_capacity(disk));
struct gendisk *disk = dev_to_disk(dev);
return sprintf(buf, "%llu\n", (unsigned long long)get_capacity(disk));
}
static ssize_t disk_capability_read(struct gendisk *disk, char *page)
static ssize_t disk_capability_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(page, "%x\n", disk->flags);
struct gendisk *disk = dev_to_disk(dev);
return sprintf(buf, "%x\n", disk->flags);
}
static ssize_t disk_stats_read(struct gendisk * disk, char *page)
static ssize_t disk_stat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gendisk *disk = dev_to_disk(dev);
preempt_disable();
disk_round_stats(disk);
preempt_enable();
return sprintf(page,
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
"%8u %8u %8u"
@ -445,40 +429,21 @@ static ssize_t disk_stats_read(struct gendisk * disk, char *page)
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_capability = {
.attr = {.name = "capability", .mode = S_IRUGO },
.show = disk_capability_read
};
static struct disk_attribute disk_attr_stat = {
.attr = {.name = "stat", .mode = S_IRUGO },
.show = disk_stats_read
};
#ifdef CONFIG_FAIL_MAKE_REQUEST
static ssize_t disk_fail_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gendisk *disk = dev_to_disk(dev);
static ssize_t disk_fail_store(struct gendisk * disk,
return sprintf(buf, "%d\n", disk->flags & GENHD_FL_FAIL ? 1 : 0);
}
static ssize_t disk_fail_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct gendisk *disk = dev_to_disk(dev);
int i;
if (count > 0 && sscanf(buf, "%d", &i) > 0) {
@ -490,134 +455,100 @@ static ssize_t disk_fail_store(struct gendisk * disk,
return count;
}
static ssize_t disk_fail_read(struct gendisk * disk, char *page)
{
return sprintf(page, "%d\n", disk->flags & GENHD_FL_FAIL ? 1 : 0);
}
static struct disk_attribute disk_attr_fail = {
.attr = {.name = "make-it-fail", .mode = S_IRUGO | S_IWUSR },
.store = disk_fail_store,
.show = disk_fail_read
};
#endif
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,
&disk_attr_capability.attr,
static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);
static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, disk_size_show, NULL);
static DEVICE_ATTR(capability, S_IRUGO, disk_capability_show, NULL);
static DEVICE_ATTR(stat, S_IRUGO, disk_stat_show, NULL);
#ifdef CONFIG_FAIL_MAKE_REQUEST
&disk_attr_fail.attr,
static struct device_attribute dev_attr_fail =
__ATTR(make-it-fail, S_IRUGO|S_IWUSR, disk_fail_show, disk_fail_store);
#endif
NULL,
static struct attribute *disk_attrs[] = {
&dev_attr_range.attr,
&dev_attr_removable.attr,
&dev_attr_size.attr,
&dev_attr_capability.attr,
&dev_attr_stat.attr,
#ifdef CONFIG_FAIL_MAKE_REQUEST
&dev_attr_fail.attr,
#endif
NULL
};
static void disk_release(struct kobject * kobj)
static struct attribute_group disk_attr_group = {
.attrs = disk_attrs,
};
static struct attribute_group *disk_attr_groups[] = {
&disk_attr_group,
NULL
};
static void disk_release(struct device *dev)
{
struct gendisk *disk = to_disk(kobj);
struct gendisk *disk = dev_to_disk(dev);
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,
struct class block_class = {
.name = "block",
};
extern struct kobj_type ktype_part;
static int block_uevent_filter(struct kset *kset, struct kobject *kobj)
{
struct kobj_type *ktype = get_ktype(kobj);
return ((ktype == &ktype_block) || (ktype == &ktype_part));
}
static int block_uevent(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env)
{
struct kobj_type *ktype = get_ktype(kobj);
struct device *physdev;
struct gendisk *disk;
struct hd_struct *part;
if (ktype == &ktype_block) {
disk = container_of(kobj, struct gendisk, kobj);
add_uevent_var(env, "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_uevent_var(env, "MINOR=%u",
disk->first_minor + part->partno);
} else
return 0;
add_uevent_var(env, "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_uevent_var(env, "PHYSDEVPATH=%s", path);
kfree(path);
if (physdev->bus)
add_uevent_var(env, "PHYSDEVBUS=%s", physdev->bus->name);
if (physdev->driver)
add_uevent_var(env, physdev->driver->name);
}
return 0;
}
static struct kset_uevent_ops block_uevent_ops = {
.filter = block_uevent_filter,
.uevent = block_uevent,
struct device_type disk_type = {
.name = "disk",
.groups = disk_attr_groups,
.release = disk_release,
};
/*
* 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;
struct device *dev;
mutex_lock(&block_subsys_lock);
list_for_each(p, &block_kset->list)
mutex_lock(&block_class_lock);
list_for_each_entry(dev, &block_class.devices, node) {
if (dev->type != &disk_type)
continue;
if (!k--)
return list_entry(p, struct gendisk, kobj.entry);
return dev_to_disk(dev);
}
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;
struct gendisk *gp = v;
struct device *dev;
++*pos;
return p==&block_kset->list ? NULL :
list_entry(p, struct gendisk, kobj.entry);
list_for_each_entry(dev, &gp->dev.node, node) {
if (&dev->node == &block_class.devices)
return NULL;
if (dev->type == &disk_type)
return dev_to_disk(dev);
}
return NULL;
}
static void diskstats_stop(struct seq_file *part, void *v)
{
mutex_unlock(&block_subsys_lock);
mutex_unlock(&block_class_lock);
}
static int diskstats_show(struct seq_file *s, void *v)
@ -627,7 +558,7 @@ static int diskstats_show(struct seq_file *s, void *v)
int n = 0;
/*
if (&sgp->kobj.entry == block_kset->list.next)
if (&gp->dev.kobj.entry == block_class.devices.next)
seq_puts(s, "major minor name"
" rio rmerge rsect ruse wio wmerge "
"wsect wuse running use aveq"
@ -681,7 +612,7 @@ static void media_change_notify_thread(struct work_struct *work)
* set enviroment vars to indicate which event this is for
* so that user space will know to go check the media status.
*/
kobject_uevent_env(&gd->kobj, KOBJ_CHANGE, envp);
kobject_uevent_env(&gd->dev.kobj, KOBJ_CHANGE, envp);
put_device(gd->driverfs_dev);
}
@ -692,6 +623,25 @@ void genhd_media_change_notify(struct gendisk *disk)
}
EXPORT_SYMBOL_GPL(genhd_media_change_notify);
dev_t blk_lookup_devt(const char *name)
{
struct device *dev;
dev_t devt = MKDEV(0, 0);
mutex_lock(&block_class_lock);
list_for_each_entry(dev, &block_class.devices, node) {
if (strcmp(dev->bus_id, name) == 0) {
devt = dev->devt;
break;
}
}
mutex_unlock(&block_class_lock);
return devt;
}
EXPORT_SYMBOL(blk_lookup_devt);
struct gendisk *alloc_disk(int minors)
{
return alloc_disk_node(minors, -1);
@ -719,10 +669,10 @@ struct gendisk *alloc_disk_node(int minors, int node_id)
}
}
disk->minors = minors;
disk->kobj.kset = block_kset;
disk->kobj.ktype = &ktype_block;
kobject_init(&disk->kobj);
rand_initialize_disk(disk);
disk->dev.class = &block_class;
disk->dev.type = &disk_type;
device_initialize(&disk->dev);
INIT_WORK(&disk->async_notify,
media_change_notify_thread);
}
@ -742,7 +692,7 @@ struct kobject *get_disk(struct gendisk *disk)
owner = disk->fops->owner;
if (owner && !try_module_get(owner))
return NULL;
kobj = kobject_get(&disk->kobj);
kobj = kobject_get(&disk->dev.kobj);
if (kobj == NULL) {
module_put(owner);
return NULL;
@ -756,7 +706,7 @@ EXPORT_SYMBOL(get_disk);
void put_disk(struct gendisk *disk)
{
if (disk)
kobject_put(&disk->kobj);
kobject_put(&disk->dev.kobj);
}
EXPORT_SYMBOL(put_disk);

4
block/ll_rw_blk.c
View file

@ -4182,7 +4182,7 @@ int blk_register_queue(struct gendisk *disk)
if (!q || !q->request_fn)
return -ENXIO;
q->kobj.parent = kobject_get(&disk->kobj);
q->kobj.parent = kobject_get(&disk->dev.kobj);
ret = kobject_add(&q->kobj);
if (ret < 0)
@ -4209,6 +4209,6 @@ void blk_unregister_queue(struct gendisk *disk)
kobject_uevent(&q->kobj, KOBJ_REMOVE);
kobject_del(&q->kobj);
kobject_put(&disk->kobj);
kobject_put(&disk->dev.kobj);
}
}

7
drivers/base/class.c
View file

@ -17,6 +17,7 @@
#include <linux/kdev_t.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/genhd.h>
#include "base.h"
#define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
@ -149,7 +150,13 @@ int class_register(struct class * cls)
if (error)
return error;
#ifdef CONFIG_SYSFS_DEPRECATED
/* let the block class directory show up in the root of sysfs */
if (cls != &block_class)
cls->subsys.kobj.kset = class_kset;
#else
cls->subsys.kobj.kset = class_kset;
#endif
cls->subsys.kobj.ktype = &class_ktype;
error = kset_register(&cls->subsys);

20
drivers/base/core.c
View file

@ -671,14 +671,15 @@ static int device_add_class_symlinks(struct device *dev)
#ifdef CONFIG_SYSFS_DEPRECATED
/* stacked class devices need a symlink in the class directory */
if (dev->kobj.parent != &dev->class->subsys.kobj) {
if (dev->kobj.parent != &dev->class->subsys.kobj &&
dev->type != &part_type) {
error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
dev->bus_id);
if (error)
goto out_subsys;
}
if (dev->parent) {
if (dev->parent && dev->type != &part_type) {
struct device *parent = dev->parent;
char *class_name;
@ -707,10 +708,11 @@ static int device_add_class_symlinks(struct device *dev)
return 0;
out_device:
if (dev->parent)
if (dev->parent && dev->type != &part_type)
sysfs_remove_link(&dev->kobj, "device");
out_busid:
if (dev->kobj.parent != &dev->class->subsys.kobj)
if (dev->kobj.parent != &dev->class->subsys.kobj &&
dev->type != &part_type)
sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
#else
/* link in the class directory pointing to the device */
@ -719,7 +721,7 @@ out_busid:
if (error)
goto out_subsys;
if (dev->parent) {
if (dev->parent && dev->type != &part_type) {
error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
"device");
if (error)
@ -743,7 +745,7 @@ static void device_remove_class_symlinks(struct device *dev)
return;
#ifdef CONFIG_SYSFS_DEPRECATED
if (dev->parent) {
if (dev->parent && dev->type != &part_type) {
char *class_name;
class_name = make_class_name(dev->class->name, &dev->kobj);
@ -754,10 +756,11 @@ static void device_remove_class_symlinks(struct device *dev)
sysfs_remove_link(&dev->kobj, "device");
}
if (dev->kobj.parent != &dev->class->subsys.kobj)
if (dev->kobj.parent != &dev->class->subsys.kobj &&
dev->type != &part_type)
sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
#else
if (dev->parent)
if (dev->parent && dev->type != &part_type)
sysfs_remove_link(&dev->kobj, "device");
sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
@ -925,6 +928,7 @@ struct device * get_device(struct device * dev)
*/
void put_device(struct device * dev)
{
/* might_sleep(); */
if (dev)
kobject_put(&dev->kobj);
}

51
drivers/block/aoe/aoeblk.c
View file

@ -15,8 +15,10 @@
static struct kmem_cache *buf_pool_cache;
static ssize_t aoedisk_show_state(struct gendisk * disk, char *page)
static ssize_t aoedisk_show_state(struct device *dev,
struct device_attribute *attr, char *page)
{
struct gendisk *disk = dev_to_disk(dev);
struct aoedev *d = disk->private_data;
return snprintf(page, PAGE_SIZE,
@ -26,50 +28,47 @@ static ssize_t aoedisk_show_state(struct gendisk * disk, char *page)
(d->nopen && !(d->flags & DEVFL_UP)) ? ",closewait" : "");
/* I'd rather see nopen exported so we can ditch closewait */
}
static ssize_t aoedisk_show_mac(struct gendisk * disk, char *page)
static ssize_t aoedisk_show_mac(struct device *dev,
struct device_attribute *attr, char *page)
{
struct gendisk *disk = dev_to_disk(dev);
struct aoedev *d = disk->private_data;
return snprintf(page, PAGE_SIZE, "%012llx\n",
(unsigned long long)mac_addr(d->addr));
}
static ssize_t aoedisk_show_netif(struct gendisk * disk, char *page)
static ssize_t aoedisk_show_netif(struct device *dev,
struct device_attribute *attr, char *page)
{
struct gendisk *disk = dev_to_disk(dev);
struct aoedev *d = disk->private_data;
return snprintf(page, PAGE_SIZE, "%s\n", d->ifp->name);
}
/* firmware version */
static ssize_t aoedisk_show_fwver(struct gendisk * disk, char *page)
static ssize_t aoedisk_show_fwver(struct device *dev,
struct device_attribute *attr, char *page)
{
struct gendisk *disk = dev_to_disk(dev);
struct aoedev *d = disk->private_data;
return snprintf(page, PAGE_SIZE, "0x%04x\n", (unsigned int) d->fw_ver);
}
static struct disk_attribute disk_attr_state = {
.attr = {.name = "state", .mode = S_IRUGO },
.show = aoedisk_show_state
};
static struct disk_attribute disk_attr_mac = {
.attr = {.name = "mac", .mode = S_IRUGO },
.show = aoedisk_show_mac
};
static struct disk_attribute disk_attr_netif = {
.attr = {.name = "netif", .mode = S_IRUGO },
.show = aoedisk_show_netif
};
static struct disk_attribute disk_attr_fwver = {
.attr = {.name = "firmware-version", .mode = S_IRUGO },
.show = aoedisk_show_fwver
static DEVICE_ATTR(state, S_IRUGO, aoedisk_show_state, NULL);
static DEVICE_ATTR(mac, S_IRUGO, aoedisk_show_mac, NULL);
static DEVICE_ATTR(netif, S_IRUGO, aoedisk_show_netif, NULL);
static struct device_attribute dev_attr_firmware_version = {
.attr = { .name = "firmware-version", .mode = S_IRUGO, .owner = THIS_MODULE },
.show = aoedisk_show_fwver,
};
static struct attribute *aoe_attrs[] = {
&disk_attr_state.attr,
&disk_attr_mac.attr,
&disk_attr_netif.attr,
&disk_attr_fwver.attr,
NULL
&dev_attr_state.attr,
&dev_attr_mac.attr,
&dev_attr_netif.attr,
&dev_attr_firmware_version.attr,
NULL,
};
static const struct attribute_group attr_group = {
@ -79,12 +78,12 @@ static const struct attribute_group attr_group = {
static int
aoedisk_add_sysfs(struct aoedev *d)
{
return sysfs_create_group(&d->gd->kobj, &attr_group);
return sysfs_create_group(&d->gd->dev.kobj, &attr_group);
}
void
aoedisk_rm_sysfs(struct aoedev *d)
{
sysfs_remove_group(&d->gd->kobj, &attr_group);
sysfs_remove_group(&d->gd->dev.kobj, &attr_group);
}
static int

15
drivers/block/nbd.c
View file

@ -375,14 +375,17 @@ harderror:
return NULL;
}
static ssize_t pid_show(struct gendisk *disk, char *page)
static ssize_t pid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(page, "%ld\n",
struct gendisk *disk = dev_to_disk(dev);
return sprintf(buf, "%ld\n",
(long) ((struct nbd_device *)disk->private_data)->pid);
}
static struct disk_attribute pid_attr = {
.attr = { .name = "pid", .mode = S_IRUGO },
static struct device_attribute pid_attr = {
.attr = { .name = "pid", .mode = S_IRUGO, .owner = THIS_MODULE },
.show = pid_show,
};
@ -394,7 +397,7 @@ static int nbd_do_it(struct nbd_device *lo)
BUG_ON(lo->magic != LO_MAGIC);
lo->pid = current->pid;
ret = sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
ret = sysfs_create_file(&lo->disk->dev.kobj, &pid_attr.attr);
if (ret) {
printk(KERN_ERR "nbd: sysfs_create_file failed!");
return ret;
@ -403,7 +406,7 @@ static int nbd_do_it(struct nbd_device *lo)
while ((req = nbd_read_stat(lo)) != NULL)
nbd_end_request(req);
sysfs_remove_file(&lo->disk->kobj, &pid_attr.attr);
sysfs_remove_file(&lo->disk->dev.kobj, &pid_attr.attr);
return 0;
}

2
drivers/ide/ide-probe.c
View file

@ -1173,7 +1173,7 @@ static struct kobject *exact_match(dev_t dev, int *part, void *data)
{
struct gendisk *p = data;
*part &= (1 << PARTN_BITS) - 1;
return &p->kobj;
return &p->dev.kobj;
}
static int exact_lock(dev_t dev, void *data)

4
drivers/md/dm.c
View file

@ -1109,7 +1109,7 @@ static void event_callback(void *context)
list_splice_init(&md->uevent_list, &uevents);
spin_unlock_irqrestore(&md->uevent_lock, flags);
dm_send_uevents(&uevents, &md->disk->kobj);
dm_send_uevents(&uevents, &md->disk->dev.kobj);
atomic_inc(&md->event_nr);
wake_up(&md->eventq);
@ -1530,7 +1530,7 @@ out:
*---------------------------------------------------------------*/
void dm_kobject_uevent(struct mapped_device *md)
{
kobject_uevent(&md->disk->kobj, KOBJ_CHANGE);
kobject_uevent(&md->disk->dev.kobj, KOBJ_CHANGE);
}
uint32_t dm_next_uevent_seq(struct mapped_device *md)

8
drivers/md/md.c
View file

@ -1396,9 +1396,9 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev)
goto fail;
if (rdev->bdev->bd_part)
ko = &rdev->bdev->bd_part->kobj;
ko = &rdev->bdev->bd_part->dev.kobj;
else
ko = &rdev->bdev->bd_disk->kobj;
ko = &rdev->bdev->bd_disk->dev.kobj;
if ((err = sysfs_create_link(&rdev->kobj, ko, "block"))) {
kobject_del(&rdev->kobj);
goto fail;
@ -3083,7 +3083,7 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data)
add_disk(disk);
mddev->gendisk = disk;
mutex_unlock(&disks_mutex);
error = kobject_init_and_add(&mddev->kobj, &md_ktype, &disk->kobj,
error = kobject_init_and_add(&mddev->kobj, &md_ktype, &disk->dev.kobj,
"%s", "md");
if (error)
printk(KERN_WARNING "md: cannot register %s/md - name in use\n",
@ -3361,7 +3361,7 @@ static int do_md_run(mddev_t * mddev)
mddev->changed = 1;
md_new_event(mddev);
kobject_uevent(&mddev->gendisk->kobj, KOBJ_CHANGE);
kobject_uevent(&mddev->gendisk->dev.kobj, KOBJ_CHANGE);
return 0;
}

8
fs/block_dev.c
View file

@ -738,9 +738,9 @@ EXPORT_SYMBOL(bd_release);
static struct kobject *bdev_get_kobj(struct block_device *bdev)
{
if (bdev->bd_contains != bdev)
return kobject_get(&bdev->bd_part->kobj);
return kobject_get(&bdev->bd_part->dev.kobj);
else
return kobject_get(&bdev->bd_disk->kobj);
return kobject_get(&bdev->bd_disk->dev.kobj);
}
static struct kobject *bdev_get_holder(struct block_device *bdev)
@ -1176,7 +1176,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part)
ret = -ENXIO;
goto out_first;
}
kobject_get(&p->kobj);
kobject_get(&p->dev.kobj);
bdev->bd_part = p;
bd_set_size(bdev, (loff_t) p->nr_sects << 9);
}
@ -1299,7 +1299,7 @@ static int __blkdev_put(struct block_device *bdev, int for_part)
module_put(owner);
if (bdev->bd_contains != bdev) {
kobject_put(&bdev->bd_part->kobj);
kobject_put(&bdev->bd_part->dev.kobj);
bdev->bd_part = NULL;
}
bdev->bd_disk = NULL;

319
fs/partitions/check.c
View file

@ -195,96 +195,45 @@ check_partition(struct gendisk *hd, struct block_device *bdev)
return ERR_PTR(res);
}
/*
* sysfs bindings for partitions
*/
struct part_attribute {
struct attribute attr;
ssize_t (*show)(struct hd_struct *,char *);
ssize_t (*store)(struct hd_struct *,const char *, size_t);
};
static ssize_t
part_attr_show(struct kobject * kobj, struct attribute * attr, char * page)
static ssize_t part_start_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct * p = container_of(kobj,struct hd_struct,kobj);
struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr);
ssize_t ret = 0;
if (part_attr->show)
ret = part_attr->show(p, page);
return ret;
}
static ssize_t
part_attr_store(struct kobject * kobj, struct attribute * attr,
const char *page, size_t count)
{
struct hd_struct * p = container_of(kobj,struct hd_struct,kobj);
struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr);
ssize_t ret = 0;
struct hd_struct *p = dev_to_part(dev);
if (part_attr->store)
ret = part_attr->store(p, page, count);
return ret;
return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
}
static struct sysfs_ops part_sysfs_ops = {
.show = part_attr_show,
.store = part_attr_store,
};
static ssize_t part_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
}
static ssize_t part_uevent_store(struct hd_struct * p,
const char *page, size_t count)
static ssize_t part_stat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
kobject_uevent(&p->kobj, KOBJ_ADD);
return count;
}
static ssize_t part_dev_read(struct hd_struct * p, char *page)
{
struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj);
dev_t dev = MKDEV(disk->major, disk->first_minor + p->partno);
return print_dev_t(page, dev);
}
static ssize_t part_start_read(struct hd_struct * p, char *page)
{
return sprintf(page, "%llu\n",(unsigned long long)p->start_sect);
}
static ssize_t part_size_read(struct hd_struct * p, char *page)
{
return sprintf(page, "%llu\n",(unsigned long long)p->nr_sects);
}
static ssize_t part_stat_read(struct hd_struct * p, char *page)
{
return sprintf(page, "%8u %8llu %8u %8llu\n",
struct hd_struct *p = dev_to_part(dev);
return sprintf(buf, "%8u %8llu %8u %8llu\n",
p->ios[0], (unsigned long long)p->sectors[0],
p->ios[1], (unsigned long long)p->sectors[1]);
}
static struct part_attribute part_attr_uevent = {
.attr = {.name = "uevent", .mode = S_IWUSR },
.store = part_uevent_store
};
static struct part_attribute part_attr_dev = {
.attr = {.name = "dev", .mode = S_IRUGO },
.show = part_dev_read
};
static struct part_attribute part_attr_start = {
.attr = {.name = "start", .mode = S_IRUGO },
.show = part_start_read
};
static struct part_attribute part_attr_size = {
.attr = {.name = "size", .mode = S_IRUGO },
.show = part_size_read
};
static struct part_attribute part_attr_stat = {
.attr = {.name = "stat", .mode = S_IRUGO },
.show = part_stat_read
};
#ifdef CONFIG_FAIL_MAKE_REQUEST
static ssize_t part_fail_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
static ssize_t part_fail_store(struct hd_struct * p,
return sprintf(buf, "%d\n", p->make_it_fail);
}
static ssize_t part_fail_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hd_struct *p = dev_to_part(dev);
int i;
if (count > 0 && sscanf(buf, "%d", &i) > 0)
@ -292,49 +241,52 @@ static ssize_t part_fail_store(struct hd_struct * p,
return count;
}
static ssize_t part_fail_read(struct hd_struct * p, char *page)
{
return sprintf(page, "%d\n", p->make_it_fail);
}
static struct part_attribute part_attr_fail = {
.attr = {.name = "make-it-fail", .mode = S_IRUGO | S_IWUSR },
.store = part_fail_store,
.show = part_fail_read
};
#endif
static struct attribute * default_attrs[] = {
&part_attr_uevent.attr,
&part_attr_dev.attr,
&part_attr_start.attr,
&part_attr_size.attr,
&part_attr_stat.attr,
static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL);
#ifdef CONFIG_FAIL_MAKE_REQUEST
&part_attr_fail.attr,
static struct device_attribute dev_attr_fail =
__ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store);
#endif
NULL,
static struct attribute *part_attrs[] = {
&dev_attr_start.attr,
&dev_attr_size.attr,
&dev_attr_stat.attr,
#ifdef CONFIG_FAIL_MAKE_REQUEST
&dev_attr_fail.attr,
#endif
NULL
};
extern struct kset *block_kset;
static struct attribute_group part_attr_group = {
.attrs = part_attrs,
};
static void part_release(struct kobject *kobj)
static struct attribute_group *part_attr_groups[] = {
&part_attr_group,
NULL
};
static void part_release(struct device *dev)
{
struct hd_struct * p = container_of(kobj,struct hd_struct,kobj);
struct hd_struct *p = dev_to_part(dev);
kfree(p);
}
struct kobj_type ktype_part = {
struct device_type part_type = {
.name = "partition",
.groups = part_attr_groups,
.release = part_release,
.default_attrs = default_attrs,
.sysfs_ops = &part_sysfs_ops,
};
static inline void partition_sysfs_add_subdir(struct hd_struct *p)
{
struct kobject *k;
k = kobject_get(&p->kobj);
k = kobject_get(&p->dev.kobj);
p->holder_dir = kobject_create_and_add("holders", k);
kobject_put(k);
}
@ -343,7 +295,7 @@ static inline void disk_sysfs_add_subdirs(struct gendisk *disk)
{
struct kobject *k;
k = kobject_get(&disk->kobj);
k = kobject_get(&disk->dev.kobj);
disk->holder_dir = kobject_create_and_add("holders", k);
disk->slave_dir = kobject_create_and_add("slaves", k);
kobject_put(k);
@ -352,6 +304,7 @@ static inline void disk_sysfs_add_subdirs(struct gendisk *disk)
void delete_partition(struct gendisk *disk, int part)
{
struct hd_struct *p = disk->part[part-1];
if (!p)
return;
if (!p->nr_sects)
@ -361,113 +314,55 @@ void delete_partition(struct gendisk *disk, int part)
p->nr_sects = 0;
p->ios[0] = p->ios[1] = 0;
p->sectors[0] = p->sectors[1] = 0;
sysfs_remove_link(&p->kobj, "subsystem");
kobject_unregister(p->holder_dir);
kobject_uevent(&p->kobj, KOBJ_REMOVE);
kobject_del(&p->kobj);
kobject_put(&p->kobj);
device_del(&p->dev);
put_device(&p->dev);
}
void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
{
struct hd_struct *p;
int err;
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return;
p->start_sect = start;
p->nr_sects = len;
p->partno = part;
p->policy = disk->policy;
if (isdigit(disk->kobj.k_name[strlen(disk->kobj.k_name)-1]))
kobject_set_name(&p->kobj, "%sp%d",
kobject_name(&disk->kobj), part);
if (isdigit(disk->dev.bus_id[strlen(disk->dev.bus_id)-1]))
snprintf(p->dev.bus_id, BUS_ID_SIZE,
"%sp%d", disk->dev.bus_id, part);
else
kobject_set_name(&p->kobj, "%s%d",
kobject_name(&disk->kobj),part);
p->kobj.parent = &disk->kobj;
p->kobj.ktype = &ktype_part;
kobject_init(&p->kobj);
kobject_add(&p->kobj);
if (!disk->part_uevent_suppress)
kobject_uevent(&p->kobj, KOBJ_ADD);
sysfs_create_link(&p->kobj, &block_kset->kobj, "subsystem");
snprintf(p->dev.bus_id, BUS_ID_SIZE,
"%s%d", disk->dev.bus_id, part);
device_initialize(&p->dev);
p->dev.devt = MKDEV(disk->major, disk->first_minor + part);
p->dev.class = &block_class;
p->dev.type = &part_type;
p->dev.parent = &disk->dev;
disk->part[part-1] = p;
/* delay uevent until 'holders' subdir is created */
p->dev.uevent_suppress = 1;
device_add(&p->dev);
partition_sysfs_add_subdir(p);
p->dev.uevent_suppress = 0;
if (flags & ADDPART_FLAG_WHOLEDISK) {
static struct attribute addpartattr = {
.name = "whole_disk",
.mode = S_IRUSR | S_IRGRP | S_IROTH,
};
sysfs_create_file(&p->kobj, &addpartattr);
}
partition_sysfs_add_subdir(p);
disk->part[part-1] = p;
}
static char *make_block_name(struct gendisk *disk)
{
char *name;
static char *block_str = "block:";
int size;
char *s;
size = strlen(block_str) + strlen(disk->disk_name) + 1;
name = kmalloc(size, GFP_KERNEL);
if (!name)
return NULL;
strcpy(name, block_str);
strcat(name, disk->disk_name);
/* ewww... some of these buggers have / in name... */
s = strchr(name, '/');
if (s)
*s = '!';
return name;
}
static int disk_sysfs_symlinks(struct gendisk *disk)
{
struct device *target = get_device(disk->driverfs_dev);
int err;
char *disk_name = NULL;
if (target) {
disk_name = make_block_name(disk);
if (!disk_name) {
err = -ENOMEM;
goto err_out;
}
err = sysfs_create_link(&disk->kobj, &target->kobj, "device");
if (err)
goto err_out_disk_name;
err = sysfs_create_link(&target->kobj, &disk->kobj, disk_name);
if (err)
goto err_out_dev_link;
err = sysfs_create_file(&p->dev.kobj, &addpartattr);
}
err = sysfs_create_link(&disk->kobj, &block_kset->kobj,
"subsystem");
if (err)
goto err_out_disk_name_lnk;
kfree(disk_name);
return 0;
err_out_disk_name_lnk:
if (target) {
sysfs_remove_link(&target->kobj, disk_name);
err_out_dev_link:
sysfs_remove_link(&disk->kobj, "device");
err_out_disk_name:
kfree(disk_name);
err_out:
put_device(target);
}
return err;
/* suppress uevent if the disk supresses it */
if (!disk->dev.uevent_suppress)
kobject_uevent(&p->dev.kobj, KOBJ_ADD);
}
/* Not exported, helper to add_disk(). */
@ -479,19 +374,29 @@ void register_disk(struct gendisk *disk)
struct hd_struct *p;
int err;
kobject_set_name(&disk->kobj, "%s", disk->disk_name);
/* ewww... some of these buggers have / in name... */
s = strchr(disk->kobj.k_name, '/');
disk->dev.parent = disk->driverfs_dev;
disk->dev.devt = MKDEV(disk->major, disk->first_minor);
strlcpy(disk->dev.bus_id, disk->disk_name, KOBJ_NAME_LEN);
/* ewww... some of these buggers have / in the name... */
s = strchr(disk->dev.bus_id, '/');
if (s)
*s = '!';
if ((err = kobject_add(&disk->kobj)))
/* delay uevents, until we scanned partition table */
disk->dev.uevent_suppress = 1;
if (device_add(&disk->dev))
return;
err = disk_sysfs_symlinks(disk);
#ifndef CONFIG_SYSFS_DEPRECATED
err = sysfs_create_link(block_depr, &disk->dev.kobj,
kobject_name(&disk->dev.kobj));
if (err) {
kobject_del(&disk->kobj);
device_del(&disk->dev);
return;
}
disk_sysfs_add_subdirs(disk);
#endif
disk_sysfs_add_subdirs(disk);
/* No minors to use for partitions */
if (disk->minors == 1)
@ -505,25 +410,23 @@ void register_disk(struct gendisk *disk)
if (!bdev)
goto exit;
/* scan partition table, but suppress uevents */
bdev->bd_invalidated = 1;
disk->part_uevent_suppress = 1;
err = blkdev_get(bdev, FMODE_READ, 0);
disk->part_uevent_suppress = 0;
if (err < 0)
goto exit;
blkdev_put(bdev);
exit:
/* announce disk after possible partitions are already created */
kobject_uevent(&disk->kobj, KOBJ_ADD);
/* announce disk after possible partitions are created */
disk->dev.uevent_suppress = 0;
kobject_uevent(&disk->dev.kobj, KOBJ_ADD);
/* announce possible partitions */
for (i = 1; i < disk->minors; i++) {
p = disk->part[i-1];
if (!p || !p->nr_sects)
continue;
kobject_uevent(&p->kobj, KOBJ_ADD);
kobject_uevent(&p->dev.kobj, KOBJ_ADD);
}
}
@ -602,19 +505,11 @@ void del_gendisk(struct gendisk *disk)
disk_stat_set_all(disk, 0);
disk->stamp = 0;
kobject_uevent(&disk->kobj, KOBJ_REMOVE);
kobject_unregister(disk->holder_dir);
kobject_unregister(disk->slave_dir);
if (disk->driverfs_dev) {
char *disk_name = make_block_name(disk);
sysfs_remove_link(&disk->kobj, "device");
if (disk_name) {
sysfs_remove_link(&disk->driverfs_dev->kobj, disk_name);
kfree(disk_name);
}
put_device(disk->driverfs_dev);
disk->driverfs_dev = NULL;
}
sysfs_remove_link(&disk->kobj, "subsystem");
kobject_del(&disk->kobj);
disk->driverfs_dev = NULL;
#ifndef CONFIG_SYSFS_DEPRECATED
sysfs_remove_link(block_depr, disk->dev.bus_id);
#endif
device_del(&disk->dev);
}

37
include/linux/genhd.h
View file

@ -10,9 +10,19 @@
*/
#include <linux/types.h>
#include <linux/kdev_t.h>
#ifdef CONFIG_BLOCK
#define kobj_to_dev(k) container_of(k, struct device, kobj)
#define dev_to_disk(device) container_of(device, struct gendisk, dev)
#define dev_to_part(device) container_of(device, struct hd_struct, dev)
extern struct device_type disk_type;
extern struct device_type part_type;
extern struct kobject *block_depr;
extern struct class block_class;
enum {
/* These three have identical behaviour; use the second one if DOS FDISK gets
confused about extended/logical partitions starting past cylinder 1023. */
@ -84,7 +94,7 @@ struct partition {
struct hd_struct {
sector_t start_sect;
sector_t nr_sects;
struct kobject kobj;
struct device dev;
struct kobject *holder_dir;
unsigned ios[2], sectors[2]; /* READs and WRITEs */
int policy, partno;
@ -117,15 +127,14 @@ struct gendisk {
* disks that can't be partitioned. */
char disk_name[32]; /* name of major driver */
struct hd_struct **part; /* [indexed by minor] */
int part_uevent_suppress;
struct block_device_operations *fops;
struct request_queue *queue;
void *private_data;
sector_t capacity;
int flags;
struct device *driverfs_dev;
struct kobject kobj;
struct device *driverfs_dev; // FIXME: remove
struct device dev;
struct kobject *holder_dir;
struct kobject *slave_dir;
@ -143,13 +152,6 @@ struct gendisk {
struct work_struct async_notify;
};
/* Structure for sysfs attributes on block devices */
struct disk_attribute {
struct attribute attr;
ssize_t (*show)(struct gendisk *, char *);
ssize_t (*store)(struct gendisk *, const char *, size_t);
};
/*
* Macros to operate on percpu disk statistics:
*
@ -411,7 +413,8 @@ struct unixware_disklabel {
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2
char *disk_name (struct gendisk *hd, int part, char *buf);
extern dev_t blk_lookup_devt(const char *name);
extern char *disk_name (struct gendisk *hd, int part, char *buf);
extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
extern void add_partition(struct gendisk *, int, sector_t, sector_t, int);
@ -423,12 +426,12 @@ extern struct gendisk *alloc_disk(int minors);
extern struct kobject *get_disk(struct gendisk *disk);
extern void put_disk(struct gendisk *disk);
extern void genhd_media_change_notify(struct gendisk *disk);
extern void blk_register_region(dev_t dev, unsigned long range,
extern void blk_register_region(dev_t devt, unsigned long range,
struct module *module,
struct kobject *(*probe)(dev_t, int *, void *),
int (*lock)(dev_t, void *),
void *data);
extern void blk_unregister_region(dev_t dev, unsigned long range);
extern void blk_unregister_region(dev_t devt, unsigned long range);
static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
{
@ -441,6 +444,12 @@ static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
static inline void printk_all_partitions(void) { }
static inline dev_t blk_lookup_devt(const char *name)
{
dev_t devt = MKDEV(0, 0);
return devt;
}
#endif /* CONFIG_BLOCK */
#endif

110
init/do_mounts.c
View file

@ -55,69 +55,6 @@ static int __init readwrite(char *str)
__setup("ro", readonly);
__setup("rw", readwrite);
static dev_t try_name(char *name, int part)
{
char path[64];
char buf[32];
int range;
dev_t res;
char *s;
int len;
int fd;
unsigned int maj, min;
/* read device number from .../dev */
sprintf(path, "/sys/block/%s/dev", name);
fd = sys_open(path, 0, 0);
if (fd < 0)
goto fail;
len = sys_read(fd, buf, 32);
sys_close(fd);
if (len <= 0 || len == 32 || buf[len - 1] != '\n')
goto fail;
buf[len - 1] = '\0';
if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
/*
* Try the %u:%u format -- see print_dev_t()
*/
res = MKDEV(maj, min);
if (maj != MAJOR(res) || min != MINOR(res))
goto fail;
} else {
/*
* Nope. Try old-style "0321"
*/
res = new_decode_dev(simple_strtoul(buf, &s, 16));
if (*s)
goto fail;
}
/* if it's there and we are not looking for a partition - that's it */
if (!part)
return res;
/* otherwise read range from .../range */
sprintf(path, "/sys/block/%s/range", name);
fd = sys_open(path, 0, 0);
if (fd < 0)
goto fail;
len = sys_read(fd, buf, 32);
sys_close(fd);
if (len <= 0 || len == 32 || buf[len - 1] != '\n')
goto fail;
buf[len - 1] = '\0';
range = simple_strtoul(buf, &s, 10);
if (*s)
goto fail;
/* if partition is within range - we got it */
if (part < range)
return res + part;
fail:
return 0;
}
/*
* Convert a name into device number. We accept the following variants:
*
@ -129,12 +66,10 @@ fail:
* 5) /dev/<disk_name>p<decimal> - same as the above, that form is
* used when disk name of partitioned disk ends on a digit.
*
* If name doesn't have fall into the categories above, we return 0.
* Sysfs is used to check if something is a disk name - it has
* all known disks under bus/block/devices. If the disk name
* contains slashes, name of sysfs node has them replaced with
* bangs. try_name() does the actual checks, assuming that sysfs
* is mounted on rootfs /sys.
* If name doesn't have fall into the categories above, we return (0,0).
* block_class is used to check if something is a disk name. If the disk
* name contains slashes, the device name has them replaced with
* bangs.
*/
dev_t name_to_dev_t(char *name)
@ -142,13 +77,6 @@ dev_t name_to_dev_t(char *name)
char s[32];
char *p;
dev_t res = 0;
int part;
#ifdef CONFIG_SYSFS
int mkdir_err = sys_mkdir("/sys", 0700);
if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
goto out;
#endif
if (strncmp(name, "/dev/", 5) != 0) {
unsigned maj, min;
@ -164,6 +92,7 @@ dev_t name_to_dev_t(char *name)
}
goto done;
}
name += 5;
res = Root_NFS;
if (strcmp(name, "nfs") == 0)
@ -178,35 +107,14 @@ dev_t name_to_dev_t(char *name)
for (p = s; *p; p++)
if (*p == '/')
*p = '!';
res = try_name(s, 0);
res = blk_lookup_devt(s);
if (res)
goto done;
while (p > s && isdigit(p[-1]))
p--;
if (p == s || !*p || *p == '0')
goto fail;
part = simple_strtoul(p, NULL, 10);
*p = '\0';
res = try_name(s, part);
if (res)
goto done;
if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
goto fail;
p[-1] = '\0';
res = try_name(s, part);
done:
#ifdef CONFIG_SYSFS
sys_umount("/sys", 0);
out:
if (!mkdir_err)
sys_rmdir("/sys");
#endif
return res;
fail:
res = 0;
goto done;
return 0;
done:
return res;
}
static int __init root_dev_setup(char *line)