diff options
Diffstat (limited to 'fs/partitions/check.c')
| -rw-r--r-- | fs/partitions/check.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c index 7408227c49c..cfb0c80690a 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -195,6 +195,14 @@ check_partition(struct gendisk *hd, struct block_device *bdev) 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) { @@ -260,6 +268,7 @@ ssize_t part_fail_store(struct device *dev, } #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(stat, S_IRUGO, part_stat_show, NULL); @@ -269,6 +278,7 @@ static struct device_attribute dev_attr_fail = #endif static struct attribute *part_attrs[] = { + &dev_attr_partition.attr, &dev_attr_start.attr, &dev_attr_size.attr, &dev_attr_stat.attr, @@ -538,10 +548,23 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev) sector_t from = state->parts[p].from; if (!size) continue; + 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)) { + /* + * 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_WARNING - "%s: p%d exceeds device capacity\n", - disk->disk_name, p); + "%s: p%d size %llu limited to end of disk\n", + disk->disk_name, p, (unsigned long long) size); + size = get_capacity(disk) - from; } res = add_partition(disk, p, from, size, state->parts[p].flags); if (res) { |