* gendisk handling
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/genhd.h>
+#include <linux/kdev_t.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/kobj_map.h>
#include <linux/buffer_head.h>
+#include <linux/mutex.h>
-#define MAX_PROBE_HASH 255 /* random */
+#include "blk.h"
-static struct subsystem block_subsys;
+static DEFINE_MUTEX(block_class_lock);
+#ifndef CONFIG_SYSFS_DEPRECATED
+struct kobject *block_depr;
+#endif
-static DECLARE_MUTEX(block_subsys_sem);
+static struct device_type disk_type;
/*
* Can be deleted altogether. Later.
struct blk_major_name *next;
int major;
char name[16];
-} *major_names[MAX_PROBE_HASH];
+} *major_names[BLKDEV_MAJOR_HASH_SIZE];
/* index in the above - for now: assume no multimajor ranges */
static inline int major_to_index(int major)
{
- return major % MAX_PROBE_HASH;
+ return major % BLKDEV_MAJOR_HASH_SIZE;
}
#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);
+void blkdev_show(struct seq_file *f, off_t offset)
+{
+ struct blk_major_name *dp;
- return len;
+ if (offset < BLKDEV_MAJOR_HASH_SIZE) {
+ 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_class_lock);
+ }
}
-#endif
+#endif /* CONFIG_PROC_FS */
int register_blkdev(unsigned int major, const char *name)
{
struct blk_major_name **n, *p;
int index, ret = 0;
- down(&block_subsys_sem);
+ mutex_lock(&block_class_lock);
/* temporary */
if (major == 0) {
kfree(p);
}
out:
- up(&block_subsys_sem);
+ mutex_unlock(&block_class_lock);
return ret;
}
EXPORT_SYMBOL(register_blkdev);
-/* todo: make void - error printk here */
-int unregister_blkdev(unsigned int major, const char *name)
+void 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);
+ mutex_lock(&block_class_lock);
for (n = &major_names[index]; *n; n = &(*n)->next)
if ((*n)->major == major)
break;
- if (!*n || strcmp((*n)->name, name))
- ret = -EINVAL;
- else {
+ if (!*n || strcmp((*n)->name, name)) {
+ WARN_ON(1);
+ } else {
p = *n;
*n = p->next;
}
- up(&block_subsys_sem);
+ mutex_unlock(&block_class_lock);
kfree(p);
-
- return ret;
}
EXPORT_SYMBOL(unregister_blkdev);
* 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;
*/
void add_disk(struct gendisk *disk)
{
+ struct backing_dev_info *bdi;
+
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);
+ blk_register_filter(disk);
+
+ bdi = &disk->queue->backing_dev_info;
+ bdi_register_dev(bdi, MKDEV(disk->major, disk->first_minor));
+ sysfs_create_link(&disk->dev.kobj, &bdi->dev->kobj, "bdi");
}
EXPORT_SYMBOL(add_disk);
void unlink_gendisk(struct gendisk *disk)
{
+ blk_unregister_filter(disk);
+ sysfs_remove_link(&disk->dev.kobj, "bdi");
+ bdi_unregister(&disk->queue->backing_dev_info);
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 gendisk *get_gendisk(dev_t devt, int *part)
+{
+ struct kobject *kobj = kobj_lookup(bdev_map, devt, part);
+ struct device *dev = kobj_to_dev(kobj);
+
+ return kobj ? dev_to_disk(dev) : NULL;
+}
+
+/*
+ * print a full list of all partitions - intended for places where the root
+ * filesystem can't be mounted and thus to give the victim some idea of what
+ * went wrong
+ */
+void __init printk_all_partitions(void)
{
- struct kobject *kobj = kobj_lookup(bdev_map, dev, part);
- return kobj ? to_disk(kobj) : NULL;
+ struct device *dev;
+ struct gendisk *sgp;
+ char buf[BDEVNAME_SIZE];
+ int n;
+
+ mutex_lock(&block_class_lock);
+ /* For each block device... */
+ 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
+ */
+ if (get_capacity(sgp) == 0 ||
+ (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO))
+ continue;
+
+ /*
+ * Note, unlike /proc/partitions, I am showing the numbers in
+ * hex - the same format as the root= option takes.
+ */
+ printk("%02x%02x %10llu %s",
+ sgp->major, sgp->first_minor,
+ (unsigned long long)get_capacity(sgp) >> 1,
+ disk_name(sgp, 0, buf));
+ if (sgp->driverfs_dev != NULL &&
+ sgp->driverfs_dev->driver != NULL)
+ printk(" driver: %s\n",
+ sgp->driverfs_dev->driver->name);
+ else
+ printk(" (driver?)\n");
+
+ /* now show the partitions */
+ for (n = 0; n < sgp->minors - 1; ++n) {
+ if (sgp->part[n] == NULL)
+ continue;
+ if (sgp->part[n]->nr_sects == 0)
+ continue;
+ printk(" %02x%02x %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));
+ }
+ }
+
+ 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;
- down(&block_subsys_sem);
- list_for_each(p, &block_subsys.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_subsys.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)
{
- up(&block_subsys_sem);
+ mutex_unlock(&block_class_lock);
}
static int show_partition(struct seq_file *part, void *v)
int n;
char buf[BDEVNAME_SIZE];
- if (&sgp->kobj.entry == block_subsys.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 */
return 0;
}
-struct seq_operations partitions_op = {
- .start =part_start,
- .next = part_next,
- .stop = part_stop,
- .show = show_partition
+const 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)
+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_sem);
+ int error = class_register(&block_class);
+ if (unlikely(error))
+ return error;
+ bdev_map = kobj_map_init(base_probe, &block_class_lock);
blk_dev_init();
- subsystem_register(&block_subsys);
+
+#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;
+ return sprintf(buf, "%d\n",
+ (disk->flags & GENHD_FL_REMOVABLE ? 1 : 0));
}
-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)
+static ssize_t disk_ro_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- return sprintf(page, "%d\n", disk->minors);
+ struct gendisk *disk = dev_to_disk(dev);
+
+ return sprintf(buf, "%d\n", disk->policy ? 1 : 0);
}
-static ssize_t disk_removable_read(struct gendisk * disk, char *page)
+
+static ssize_t disk_size_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- return sprintf(page, "%d\n",
- (disk->flags & GENHD_FL_REMOVABLE ? 1 : 0));
+ struct gendisk *disk = dev_to_disk(dev);
+ return sprintf(buf, "%llu\n", (unsigned long long)get_capacity(disk));
}
-static ssize_t disk_size_read(struct gendisk * disk, char *page)
+
+static ssize_t disk_capability_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, "%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,
- "%8u %8u %8llu %8u "
- "%8u %8u %8llu %8u "
+ return sprintf(buf,
+ "%8lu %8lu %8llu %8u "
+ "%8lu %8lu %8llu %8u "
"%8u %8u %8u"
"\n",
disk_stat_read(disk, ios[READ]),
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)
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+static ssize_t disk_fail_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- 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,
-};
+ struct gendisk *disk = dev_to_disk(dev);
-extern struct kobj_type ktype_part;
+ return sprintf(buf, "%d\n", disk->flags & GENHD_FL_FAIL ? 1 : 0);
+}
-static int block_hotplug_filter(struct kset *kset, struct kobject *kobj)
+static ssize_t disk_fail_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
- struct kobj_type *ktype = get_ktype(kobj);
+ struct gendisk *disk = dev_to_disk(dev);
+ int i;
- return ((ktype == &ktype_block) || (ktype == &ktype_part));
+ if (count > 0 && sscanf(buf, "%d", &i) > 0) {
+ if (i == 0)
+ disk->flags &= ~GENHD_FL_FAIL;
+ else
+ disk->flags |= GENHD_FL_FAIL;
+ }
+
+ return count;
}
-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;
+#endif
- 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);
- }
+static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);
+static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL);
+static DEVICE_ATTR(ro, S_IRUGO, disk_ro_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
+static struct device_attribute dev_attr_fail =
+ __ATTR(make-it-fail, S_IRUGO|S_IWUSR, disk_fail_show, disk_fail_store);
+#endif
- /* terminate, set to next free slot, shrink available space */
- envp[i] = NULL;
- envp = &envp[i];
- num_envp -= i;
- buffer = &buffer[length];
- buffer_size -= length;
+static struct attribute *disk_attrs[] = {
+ &dev_attr_range.attr,
+ &dev_attr_removable.attr,
+ &dev_attr_ro.attr,
+ &dev_attr_size.attr,
+ &dev_attr_capability.attr,
+ &dev_attr_stat.attr,
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+ &dev_attr_fail.attr,
+#endif
+ NULL
+};
- return 0;
-}
+static struct attribute_group disk_attr_group = {
+ .attrs = disk_attrs,
+};
-static struct kset_hotplug_ops block_hotplug_ops = {
- .filter = block_hotplug_filter,
- .hotplug = block_hotplug,
+static struct attribute_group *disk_attr_groups[] = {
+ &disk_attr_group,
+ NULL
};
-/* declare block_subsys. */
-static decl_subsys(block, &ktype_block, &block_hotplug_ops);
+static void disk_release(struct device *dev)
+{
+ struct gendisk *disk = dev_to_disk(dev);
+
+ kfree(disk->random);
+ kfree(disk->part);
+ free_disk_stats(disk);
+ kfree(disk);
+}
+struct class block_class = {
+ .name = "block",
+};
+static 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;
- down(&block_subsys_sem);
- list_for_each(p, &block_subsys.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_subsys.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)
{
- up(&block_subsys_sem);
+ mutex_unlock(&block_class_lock);
}
static int diskstats_show(struct seq_file *s, void *v)
int n = 0;
/*
- if (&sgp->kobj.entry == block_subsys.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"
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",
+ seq_printf(s, "%4d %4d %s %lu %lu %llu %u %lu %lu %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]),
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]);
+ if (!hd || !hd->nr_sects)
+ continue;
+
+ preempt_disable();
+ part_round_stats(hd);
+ preempt_enable();
+ seq_printf(s, "%4d %4d %s %lu %lu %llu "
+ "%u %lu %lu %llu %u %u %u %u\n",
+ gp->major, n + gp->first_minor + 1,
+ disk_name(gp, n + 1, buf),
+ part_stat_read(hd, ios[0]),
+ part_stat_read(hd, merges[0]),
+ (unsigned long long)part_stat_read(hd, sectors[0]),
+ jiffies_to_msecs(part_stat_read(hd, ticks[0])),
+ part_stat_read(hd, ios[1]),
+ part_stat_read(hd, merges[1]),
+ (unsigned long long)part_stat_read(hd, sectors[1]),
+ jiffies_to_msecs(part_stat_read(hd, ticks[1])),
+ hd->in_flight,
+ jiffies_to_msecs(part_stat_read(hd, io_ticks)),
+ jiffies_to_msecs(part_stat_read(hd, time_in_queue))
+ );
}
return 0;
}
-struct seq_operations diskstats_op = {
+const struct seq_operations diskstats_op = {
.start = diskstats_start,
.next = diskstats_next,
.stop = diskstats_stop,
.show = diskstats_show
};
+static void media_change_notify_thread(struct work_struct *work)
+{
+ struct gendisk *gd = container_of(work, struct gendisk, async_notify);
+ char event[] = "MEDIA_CHANGE=1";
+ char *envp[] = { event, NULL };
+
+ /*
+ * 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->dev.kobj, KOBJ_CHANGE, envp);
+ put_device(gd->driverfs_dev);
+}
+
+#if 0
+void genhd_media_change_notify(struct gendisk *disk)
+{
+ get_device(disk->driverfs_dev);
+ schedule_work(&disk->async_notify);
+}
+EXPORT_SYMBOL_GPL(genhd_media_change_notify);
+#endif /* 0 */
+
+dev_t blk_lookup_devt(const char *name, int part)
+{
+ struct device *dev;
+ dev_t devt = MKDEV(0, 0);
+
+ mutex_lock(&block_class_lock);
+ list_for_each_entry(dev, &block_class.devices, node) {
+ if (dev->type != &disk_type)
+ continue;
+ if (strcmp(dev->bus_id, name) == 0) {
+ struct gendisk *disk = dev_to_disk(dev);
+
+ if (part < disk->minors)
+ devt = MKDEV(MAJOR(dev->devt),
+ MINOR(dev->devt) + part);
+ 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);
{
struct gendisk *disk;
- disk = kmalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
+ disk = kmalloc_node(sizeof(struct gendisk),
+ GFP_KERNEL | __GFP_ZERO, 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);
+ disk->part = kmalloc_node(size,
+ GFP_KERNEL | __GFP_ZERO, node_id);
if (!disk->part) {
+ free_disk_stats(disk);
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);
+ disk->dev.class = &block_class;
+ disk->dev.type = &disk_type;
+ device_initialize(&disk->dev);
+ INIT_WORK(&disk->async_notify,
+ media_change_notify_thread);
}
return 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;
void put_disk(struct gendisk *disk)
{
if (disk)
- kobject_put(&disk->kobj);
+ kobject_put(&disk->dev.kobj);
}
EXPORT_SYMBOL(put_disk);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff