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block: make printk_partition use the class iterator function 

Use the proper class iterator function instead of mucking around in the
internals of the class structures.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2008-05-22 17:21:08 -04:00
parent 6ffeea77ff
commit 5c6f35c5ec
1 changed files with 52 additions and 45 deletions
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97
block/genhd.c
View File

@ -226,6 +226,57 @@ struct gendisk *get_gendisk(dev_t devt, int *part)
return kobj ? dev_to_disk(dev) : NULL;
}
/*
* print a partitions - intended for places where the root filesystem can't be
* mounted and thus to give the victim some idea of what went wrong
*/
static int printk_partition(struct device *dev, void *data)
{
struct gendisk *sgp;
char buf[BDEVNAME_SIZE];
int n;
if (dev->type != &disk_type)
goto exit;
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))
goto exit;
/*
* 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)
goto exit;
if (sgp->part[n]->nr_sects == 0)
goto exit;
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));
}
exit:
return 0;
}
/*
* 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
@ -233,52 +284,8 @@ struct gendisk *get_gendisk(dev_t devt, int *part)
*/
void __init printk_all_partitions(void)
{
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));
}
}
class_for_each_device(&block_class, NULL, NULL, printk_partition);
mutex_unlock(&block_class_lock);
}