* 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 */
-
-static struct subsystem block_subsys;
-
-static DECLARE_MUTEX(block_subsys_sem);
+struct kset block_subsys;
+static DEFINE_MUTEX(block_subsys_lock);
/*
* 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);
- return len;
+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);
+ for (dp = major_names[offset]; dp; dp = dp->next)
+ seq_printf(f, "%3d %s\n", dp->major, dp->name);
+ mutex_unlock(&block_subsys_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_subsys_lock);
/* temporary */
if (major == 0) {
kfree(p);
}
out:
- up(&block_subsys_sem);
+ mutex_unlock(&block_subsys_lock);
return ret;
}
int index = major_to_index(major);
int ret = 0;
- down(&block_subsys_sem);
+ mutex_lock(&block_subsys_lock);
for (n = &major_names[index]; *n; n = &(*n)->next)
if ((*n)->major == major)
break;
p = *n;
*n = p->next;
}
- up(&block_subsys_sem);
+ mutex_unlock(&block_subsys_lock);
kfree(p);
return ret;
struct list_head *p;
loff_t l = *pos;
- down(&block_subsys_sem);
- list_for_each(p, &block_subsys.kset.list)
+ mutex_lock(&block_subsys_lock);
+ list_for_each(p, &block_subsys.list)
if (!l--)
return list_entry(p, struct gendisk, kobj.entry);
return NULL;
{
struct list_head *p = ((struct gendisk *)v)->kobj.entry.next;
++*pos;
- return p==&block_subsys.kset.list ? NULL :
+ return p==&block_subsys.list ? NULL :
list_entry(p, struct gendisk, kobj.entry);
}
static void part_stop(struct seq_file *part, void *v)
{
- up(&block_subsys_sem);
+ mutex_unlock(&block_subsys_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->kobj.entry == block_subsys.list.next)
seq_puts(part, "major minor #blocks name\n\n");
/* Don't show non-partitionable removeable devices or empty devices */
static int __init genhd_device_init(void)
{
- bdev_map = kobj_map_init(base_probe, &block_subsys_sem);
+ int err;
+
+ bdev_map = kobj_map_init(base_probe, &block_subsys_lock);
blk_dev_init();
- subsystem_register(&block_subsys);
- return 0;
+ err = subsystem_register(&block_subsys);
+ if (err < 0)
+ printk(KERN_WARNING "%s: subsystem_register error: %d\n",
+ __FUNCTION__, err);
+ return err;
}
subsys_initcall(genhd_device_init);
static ssize_t disk_uevent_store(struct gendisk * disk,
const char *buf, size_t count)
{
- kobject_hotplug(&disk->kobj, KOBJ_ADD);
+ kobject_uevent(&disk->kobj, KOBJ_ADD);
return count;
}
static ssize_t disk_dev_read(struct gendisk * disk, char *page)
disk_round_stats(disk);
preempt_enable();
return sprintf(page,
- "%8u %8u %8llu %8u "
- "%8u %8u %8llu %8u "
+ "%8lu %8lu %8llu %8u "
+ "%8lu %8lu %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_stat_read(disk, ios[READ]),
+ disk_stat_read(disk, merges[READ]),
+ (unsigned long long)disk_stat_read(disk, sectors[READ]),
+ jiffies_to_msecs(disk_stat_read(disk, ticks[READ])),
+ disk_stat_read(disk, ios[WRITE]),
+ disk_stat_read(disk, merges[WRITE]),
+ (unsigned long long)disk_stat_read(disk, sectors[WRITE]),
+ jiffies_to_msecs(disk_stat_read(disk, ticks[WRITE])),
disk->in_flight,
jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
.show = disk_stats_read
};
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+
+static ssize_t disk_fail_store(struct gendisk * disk,
+ const char *buf, size_t count)
+{
+ int i;
+
+ 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 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_removable.attr,
&disk_attr_size.attr,
&disk_attr_stat.attr,
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+ &disk_attr_fail.attr,
+#endif
NULL,
};
extern struct kobj_type ktype_part;
-static int block_hotplug_filter(struct kset *kset, struct kobject *kobj)
+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_hotplug(struct kset *kset, struct kobject *kobj, char **envp,
+static int block_uevent(struct kset *kset, struct kobject *kobj, char **envp,
int num_envp, char *buffer, int buffer_size)
{
struct kobj_type *ktype = get_ktype(kobj);
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);
+ add_uevent_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);
+ add_uevent_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_uevent_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);
+ add_uevent_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);
+ add_uevent_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);
+ add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "PHYSDEVDRIVER=%s",
+ physdev->driver->name);
}
/* terminate, set to next free slot, shrink available space */
return 0;
}
-static struct kset_hotplug_ops block_hotplug_ops = {
- .filter = block_hotplug_filter,
- .hotplug = block_hotplug,
+static struct kset_uevent_ops block_uevent_ops = {
+ .filter = block_uevent_filter,
+ .uevent = block_uevent,
};
-/* declare block_subsys. */
-static decl_subsys(block, &ktype_block, &block_hotplug_ops);
-
+decl_subsys(block, &ktype_block, &block_uevent_ops);
/*
* aggregate disk stat collector. Uses the same stats that the sysfs
loff_t k = *pos;
struct list_head *p;
- down(&block_subsys_sem);
- list_for_each(p, &block_subsys.kset.list)
+ mutex_lock(&block_subsys_lock);
+ list_for_each(p, &block_subsys.list)
if (!k--)
return list_entry(p, struct gendisk, kobj.entry);
return NULL;
{
struct list_head *p = ((struct gendisk *)v)->kobj.entry.next;
++*pos;
- return p==&block_subsys.kset.list ? NULL :
+ return p==&block_subsys.list ? NULL :
list_entry(p, struct gendisk, kobj.entry);
}
static void diskstats_stop(struct seq_file *part, void *v)
{
- up(&block_subsys_sem);
+ mutex_unlock(&block_subsys_lock);
}
static int diskstats_show(struct seq_file *s, void *v)
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]),
Code Review / linux-2.6.git / blobdiff