brd: add ram disk visibility option
Currenly ram disk is not visiable inside /proc/partitions. This was
done for compatibility reasons here: 53978d0a7a
. But some utilities
expect disk presents in /proc/partitions.
Let's add module's option and let's administrator chose visibility behaviour.
By default, old behaviour preserved.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -442,12 +442,15 @@ static int rd_nr;
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int rd_size = CONFIG_BLK_DEV_RAM_SIZE;
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static int max_part;
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static int part_shift;
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static int part_show = 0;
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module_param(rd_nr, int, S_IRUGO);
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MODULE_PARM_DESC(rd_nr, "Maximum number of brd devices");
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module_param(rd_size, int, S_IRUGO);
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MODULE_PARM_DESC(rd_size, "Size of each RAM disk in kbytes.");
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module_param(max_part, int, S_IRUGO);
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MODULE_PARM_DESC(max_part, "Maximum number of partitions per RAM disk");
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module_param(part_show, int, S_IRUGO);
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MODULE_PARM_DESC(part_show, "Control RAM disk visibility in /proc/partitions");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_BLOCKDEV_MAJOR(RAMDISK_MAJOR);
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MODULE_ALIAS("rd");
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@ -501,7 +504,8 @@ static struct brd_device *brd_alloc(int i)
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disk->fops = &brd_fops;
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disk->private_data = brd;
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disk->queue = brd->brd_queue;
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disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
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if (!part_show)
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disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
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sprintf(disk->disk_name, "ram%d", i);
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set_capacity(disk, rd_size * 2);
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