#include <linux/mutex.h>
#include <linux/idr.h>
#include <linux/log2.h>
-#include <linux/ctype.h>
#include "blk.h"
static struct device_type disk_type;
+static void disk_alloc_events(struct gendisk *disk);
static void disk_add_events(struct gendisk *disk);
static void disk_del_events(struct gendisk *disk);
static void disk_release_events(struct gendisk *disk);
disk->major = MAJOR(devt);
disk->first_minor = MINOR(devt);
+ disk_alloc_events(disk);
+
/* Register BDI before referencing it from bdev */
bdi = &disk->queue->backing_dev_info;
bdi_register_dev(bdi, disk_devt(disk));
subsys_initcall(genhd_device_init);
-static ssize_t alias_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct gendisk *disk = dev_to_disk(dev);
- ssize_t ret = 0;
-
- if (disk->alias)
- ret = snprintf(buf, ALIAS_LEN, "%s\n", disk->alias);
- return ret;
-}
-
-static ssize_t alias_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct gendisk *disk = dev_to_disk(dev);
- char *alias;
- char *envp[] = { NULL, NULL };
- unsigned char c;
- int i;
- ssize_t ret = count;
-
- if (!count)
- return -EINVAL;
-
- if (count >= ALIAS_LEN) {
- printk(KERN_ERR "alias: alias is too long\n");
- return -EINVAL;
- }
-
- /* Validation check */
- for (i = 0; i < count; i++) {
- c = buf[i];
- if (i == count - 1 && c == '\n')
- break;
- if (!isalnum(c) && c != '_' && c != '-') {
- printk(KERN_ERR "alias: invalid alias\n");
- return -EINVAL;
- }
- }
-
- if (disk->alias) {
- printk(KERN_INFO "alias: %s is already assigned (%s)\n",
- disk->disk_name, disk->alias);
- return -EINVAL;
- }
-
- alias = kasprintf(GFP_KERNEL, "%s", buf);
- if (!alias)
- return -ENOMEM;
-
- if (alias[count - 1] == '\n')
- alias[count - 1] = '\0';
-
- envp[0] = kasprintf(GFP_KERNEL, "ALIAS=%s", alias);
- if (!envp[0]) {
- kfree(alias);
- return -ENOMEM;
- }
-
- disk->alias = alias;
- printk(KERN_INFO "alias: assigned %s to %s\n", alias, disk->disk_name);
-
- kobject_uevent_env(&dev->kobj, KOBJ_ADD, envp);
-
- kfree(envp[0]);
- return ret;
-}
-
static ssize_t disk_range_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", queue_discard_alignment(disk->queue));
}
-static DEVICE_ATTR(alias, S_IRUGO|S_IWUSR, alias_show, alias_store);
static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);
static DEVICE_ATTR(ext_range, S_IRUGO, disk_ext_range_show, NULL);
static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL);
#endif
static struct attribute *disk_attrs[] = {
- &dev_attr_alias.attr,
&dev_attr_range.attr,
&dev_attr_ext_range.attr,
&dev_attr_removable.attr,
intv = disk_events_poll_jiffies(disk);
set_timer_slack(&ev->dwork.timer, intv / 4);
if (check_now)
- queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
+ queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
else if (intv)
- queue_delayed_work(system_nrt_wq, &ev->dwork, intv);
+ queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, intv);
out_unlock:
spin_unlock_irqrestore(&ev->lock, flags);
}
ev->clearing |= mask;
if (!ev->block) {
cancel_delayed_work(&ev->dwork);
- queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
+ queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
}
spin_unlock_irq(&ev->lock);
}
/* uncondtionally schedule event check and wait for it to finish */
disk_block_events(disk);
- queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
+ queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
flush_delayed_work(&ev->dwork);
__disk_unblock_events(disk, false);
intv = disk_events_poll_jiffies(disk);
if (!ev->block && intv)
- queue_delayed_work(system_nrt_wq, &ev->dwork, intv);
+ queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, intv);
spin_unlock_irq(&ev->lock);
&disk_events_dfl_poll_msecs, 0644);
/*
- * disk_{add|del|release}_events - initialize and destroy disk_events.
+ * disk_{alloc|add|del|release}_events - initialize and destroy disk_events.
*/
-static void disk_add_events(struct gendisk *disk)
+static void disk_alloc_events(struct gendisk *disk)
{
struct disk_events *ev;
return;
}
- if (sysfs_create_files(&disk_to_dev(disk)->kobj,
- disk_events_attrs) < 0) {
- pr_warn("%s: failed to create sysfs files for events\n",
- disk->disk_name);
- kfree(ev);
- return;
- }
-
- disk->ev = ev;
-
INIT_LIST_HEAD(&ev->node);
ev->disk = disk;
spin_lock_init(&ev->lock);
ev->poll_msecs = -1;
INIT_DELAYED_WORK(&ev->dwork, disk_events_workfn);
+ disk->ev = ev;
+}
+
+static void disk_add_events(struct gendisk *disk)
+{
+ if (!disk->ev)
+ return;
+
+ /* FIXME: error handling */
+ if (sysfs_create_files(&disk_to_dev(disk)->kobj, disk_events_attrs) < 0)
+ pr_warn("%s: failed to create sysfs files for events\n",
+ disk->disk_name);
+
mutex_lock(&disk_events_mutex);
- list_add_tail(&ev->node, &disk_events);
+ list_add_tail(&disk->ev->node, &disk_events);
mutex_unlock(&disk_events_mutex);
/*