#include <linux/kmod.h>
#include <linux/ctype.h>
#include <linux/genhd.h>
+#include <linux/blktrace_api.h>
#include "check.h"
const char *bdevname(struct block_device *bdev, char *buf)
{
- int partno = 0;
-
- if (bdev->bd_part)
- partno = bdev->bd_part->partno;
-
- return disk_name(bdev->bd_disk, partno, buf);
+ return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf);
}
EXPORT_SYMBOL(bdevname);
if (isdigit(state->name[strlen(state->name)-1]))
sprintf(state->name, "p");
- state->limit = disk_max_parts(hd) + 1;
+ state->limit = disk_max_parts(hd);
i = res = err = 0;
while (!res && check_part[i]) {
memset(&state->parts, 0, sizeof(state->parts));
return ERR_PTR(res);
}
+static ssize_t part_partition_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ return sprintf(buf, "%d\n", p->partno);
+}
+
static ssize_t part_start_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
}
-static ssize_t part_size_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+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_stat_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ssize_t part_alignment_offset_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->alignment_offset);
+}
+
+ssize_t part_discard_alignment_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+ return sprintf(buf, "%u\n", p->discard_alignment);
+}
+
+ssize_t part_stat_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part_round_stats(cpu, p);
- disk_stat_unlock();
+ part_stat_unlock();
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
part_stat_read(p, merges[WRITE]),
(unsigned long long)part_stat_read(p, sectors[WRITE]),
jiffies_to_msecs(part_stat_read(p, ticks[WRITE])),
- p->in_flight,
+ part_in_flight(p),
jiffies_to_msecs(part_stat_read(p, io_ticks)),
jiffies_to_msecs(part_stat_read(p, time_in_queue)));
}
+ssize_t part_inflight_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+
+ return sprintf(buf, "%8u %8u\n", p->in_flight[0], p->in_flight[1]);
+}
+
#ifdef CONFIG_FAIL_MAKE_REQUEST
-static ssize_t part_fail_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ssize_t part_fail_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
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)
+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;
}
#endif
+static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL);
static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
+static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL);
+static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show,
+ NULL);
static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL);
+static DEVICE_ATTR(inflight, S_IRUGO, part_inflight_show, NULL);
#ifdef CONFIG_FAIL_MAKE_REQUEST
static struct device_attribute dev_attr_fail =
__ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store);
#endif
static struct attribute *part_attrs[] = {
+ &dev_attr_partition.attr,
&dev_attr_start.attr,
&dev_attr_size.attr,
+ &dev_attr_alignment_offset.attr,
+ &dev_attr_discard_alignment.attr,
&dev_attr_stat.attr,
+ &dev_attr_inflight.attr,
#ifdef CONFIG_FAIL_MAKE_REQUEST
&dev_attr_fail.attr,
#endif
.attrs = part_attrs,
};
-static struct attribute_group *part_attr_groups[] = {
+static const struct attribute_group *part_attr_groups[] = {
&part_attr_group,
+#ifdef CONFIG_BLK_DEV_IO_TRACE
+ &blk_trace_attr_group,
+#endif
NULL
};
.release = part_release,
};
-static inline void disk_sysfs_add_subdirs(struct gendisk *disk)
-{
- struct kobject *k;
-
- k = kobject_get(&disk_to_dev(disk)->kobj);
- disk->holder_dir = kobject_create_and_add("holders", k);
- disk->slave_dir = kobject_create_and_add("slaves", k);
- kobject_put(k);
-}
-
static void delete_partition_rcu_cb(struct rcu_head *head)
{
struct hd_struct *part = container_of(head, struct hd_struct, rcu_head);
void delete_partition(struct gendisk *disk, int partno)
{
+ struct disk_part_tbl *ptbl = disk->part_tbl;
struct hd_struct *part;
- part = disk->__part[partno-1];
+ if (partno >= ptbl->len)
+ return;
+
+ part = ptbl->part[partno];
if (!part)
return;
blk_free_devt(part_devt(part));
- rcu_assign_pointer(disk->__part[partno-1], NULL);
+ rcu_assign_pointer(ptbl->part[partno], NULL);
+ rcu_assign_pointer(ptbl->last_lookup, NULL);
kobject_put(part->holder_dir);
device_del(part_to_dev(part));
static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH,
whole_disk_show, NULL);
-int add_partition(struct gendisk *disk, int partno,
- sector_t start, sector_t len, int flags)
+struct hd_struct *add_partition(struct gendisk *disk, int partno,
+ sector_t start, sector_t len, int flags)
{
struct hd_struct *p;
dev_t devt = MKDEV(0, 0);
struct device *ddev = disk_to_dev(disk);
struct device *pdev;
+ struct disk_part_tbl *ptbl;
const char *dname;
int err;
- if (disk->__part[partno - 1])
- return -EBUSY;
+ err = disk_expand_part_tbl(disk, partno);
+ if (err)
+ return ERR_PTR(err);
+ ptbl = disk->part_tbl;
+
+ if (ptbl->part[partno])
+ return ERR_PTR(-EBUSY);
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
- return -ENOMEM;
+ return ERR_PTR(-EBUSY);
if (!init_part_stats(p)) {
err = -ENOMEM;
pdev = part_to_dev(p);
p->start_sect = start;
+ p->alignment_offset = queue_sector_alignment_offset(disk->queue, start);
+ p->discard_alignment = queue_sector_discard_alignment(disk->queue,
+ start);
p->nr_sects = len;
p->partno = partno;
- p->policy = disk->policy;
+ p->policy = get_disk_ro(disk);
dname = dev_name(ddev);
if (isdigit(dname[strlen(dname) - 1]))
- snprintf(pdev->bus_id, BUS_ID_SIZE, "%sp%d", dname, partno);
+ dev_set_name(pdev, "%sp%d", dname, partno);
else
- snprintf(pdev->bus_id, BUS_ID_SIZE, "%s%d", dname, partno);
+ dev_set_name(pdev, "%s%d", dname, partno);
device_initialize(pdev);
pdev->class = &block_class;
err = blk_alloc_devt(p, &devt);
if (err)
- goto out_free;
+ goto out_free_stats;
pdev->devt = devt;
/* delay uevent until 'holders' subdir is created */
- pdev->uevent_suppress = 1;
+ dev_set_uevent_suppress(pdev, 1);
err = device_add(pdev);
if (err)
goto out_put;
if (!p->holder_dir)
goto out_del;
- pdev->uevent_suppress = 0;
+ dev_set_uevent_suppress(pdev, 0);
if (flags & ADDPART_FLAG_WHOLEDISK) {
err = device_create_file(pdev, &dev_attr_whole_disk);
if (err)
/* everything is up and running, commence */
INIT_RCU_HEAD(&p->rcu_head);
- rcu_assign_pointer(disk->__part[partno - 1], p);
+ rcu_assign_pointer(ptbl->part[partno], p);
/* suppress uevent if the disk supresses it */
- if (!ddev->uevent_suppress)
+ if (!dev_get_uevent_suppress(ddev))
kobject_uevent(&pdev->kobj, KOBJ_ADD);
- return 0;
+ return p;
+out_free_stats:
+ free_part_stats(p);
out_free:
kfree(p);
- return err;
+ return ERR_PTR(err);
out_del:
kobject_put(p->holder_dir);
device_del(pdev);
out_put:
put_device(pdev);
blk_free_devt(devt);
- return err;
+ return ERR_PTR(err);
}
/* Not exported, helper to add_disk(). */
struct block_device *bdev;
struct disk_part_iter piter;
struct hd_struct *part;
- char *s;
int err;
ddev->parent = disk->driverfs_dev;
- strlcpy(ddev->bus_id, disk->disk_name, BUS_ID_SIZE);
- /* ewww... some of these buggers have / in the name... */
- s = strchr(ddev->bus_id, '/');
- if (s)
- *s = '!';
+ dev_set_name(ddev, disk->disk_name);
/* delay uevents, until we scanned partition table */
- ddev->uevent_suppress = 1;
+ dev_set_uevent_suppress(ddev, 1);
if (device_add(ddev))
return;
return;
}
#endif
- disk_sysfs_add_subdirs(disk);
+ disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
+ disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
/* No minors to use for partitions */
- if (!disk_max_parts(disk))
+ if (!disk_partitionable(disk))
goto exit;
/* No such device (e.g., media were just removed) */
goto exit;
bdev->bd_invalidated = 1;
- err = blkdev_get(bdev, FMODE_READ, 0);
+ err = blkdev_get(bdev, FMODE_READ);
if (err < 0)
goto exit;
- blkdev_put(bdev);
+ blkdev_put(bdev, FMODE_READ);
exit:
/* announce disk after possible partitions are created */
- ddev->uevent_suppress = 0;
+ dev_set_uevent_suppress(ddev, 0);
kobject_uevent(&ddev->kobj, KOBJ_ADD);
/* announce possible partitions */
struct disk_part_iter piter;
struct hd_struct *part;
struct parsed_partitions *state;
- int p, res;
+ int p, highest, res;
if (bdev->bd_part_count)
return -EBUSY;
res = invalidate_partition(disk, 0);
if (res)
return res;
- bdev->bd_invalidated = 0;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter)))
if (disk->fops->revalidate_disk)
disk->fops->revalidate_disk(disk);
+ check_disk_size_change(disk, bdev);
+ bdev->bd_invalidated = 0;
if (!get_capacity(disk) || !(state = check_partition(disk, bdev)))
return 0;
if (IS_ERR(state)) /* I/O error reading the partition table */
/* tell userspace that the media / partition table may have changed */
kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
+ /* Detect the highest partition number and preallocate
+ * disk->part_tbl. This is an optimization and not strictly
+ * necessary.
+ */
+ for (p = 1, highest = 0; p < state->limit; p++)
+ if (state->parts[p].size)
+ highest = p;
+
+ disk_expand_part_tbl(disk, highest);
+
+ /* add partitions */
for (p = 1; p < state->limit; p++) {
- sector_t size = state->parts[p].size;
- sector_t from = state->parts[p].from;
+ sector_t size, from;
+try_scan:
+ size = state->parts[p].size;
if (!size)
continue;
+
+ from = state->parts[p].from;
+ if (from >= get_capacity(disk)) {
+ printk(KERN_WARNING
+ "%s: p%d ignored, start %llu is behind the end of the disk\n",
+ disk->disk_name, p, (unsigned long long) from);
+ continue;
+ }
+
if (from + size > get_capacity(disk)) {
+ const struct block_device_operations *bdops = disk->fops;
+ unsigned long long capacity;
+
printk(KERN_WARNING
- "%s: p%d exceeds device capacity\n",
- disk->disk_name, p);
+ "%s: p%d size %llu exceeds device capacity, ",
+ disk->disk_name, p, (unsigned long long) size);
+
+ if (bdops->set_capacity &&
+ (disk->flags & GENHD_FL_NATIVE_CAPACITY) == 0) {
+ printk(KERN_CONT "enabling native capacity\n");
+ capacity = bdops->set_capacity(disk, ~0ULL);
+ disk->flags |= GENHD_FL_NATIVE_CAPACITY;
+ if (capacity > get_capacity(disk)) {
+ set_capacity(disk, capacity);
+ check_disk_size_change(disk, bdev);
+ bdev->bd_invalidated = 0;
+ }
+ goto try_scan;
+ } else {
+ /*
+ * we can not ignore partitions of broken tables
+ * created by for example camera firmware, but
+ * we limit them to the end of the disk to avoid
+ * creating invalid block devices
+ */
+ printk(KERN_CONT "limited to end of disk\n");
+ size = get_capacity(disk) - from;
+ }
}
- res = add_partition(disk, p, from, size, state->parts[p].flags);
- if (res) {
- printk(KERN_ERR " %s: p%d could not be added: %d\n",
- disk->disk_name, p, -res);
+ part = add_partition(disk, p, from, size,
+ state->parts[p].flags);
+ if (IS_ERR(part)) {
+ printk(KERN_ERR " %s: p%d could not be added: %ld\n",
+ disk->disk_name, p, -PTR_ERR(part));
continue;
}
#ifdef CONFIG_BLK_DEV_MD
if (state->parts[p].flags & ADDPART_FLAG_RAID)
- md_autodetect_dev(bdev->bd_dev+p);
+ md_autodetect_dev(part_to_dev(part)->devt);
#endif
}
kfree(state);
disk_part_iter_exit(&piter);
invalidate_partition(disk, 0);
- disk->capacity = 0;
+ blk_free_devt(disk_to_dev(disk)->devt);
+ set_capacity(disk, 0);
disk->flags &= ~GENHD_FL_UP;
unlink_gendisk(disk);
- disk_stat_set_all(disk, 0);
- disk->stamp = 0;
+ part_stat_set_all(&disk->part0, 0);
+ disk->part0.stamp = 0;
- kobject_put(disk->holder_dir);
+ kobject_put(disk->part0.holder_dir);
kobject_put(disk->slave_dir);
disk->driverfs_dev = NULL;
#ifndef CONFIG_SYSFS_DEPRECATED
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff