From: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Some programs require HDIO_GETGEO work, which requires we implement
getgeo. Based off of the work done to the NVMe driver in this commit:
4cc09e2dc4cb NVMe: Add getgeo to block ops
[Boaz] Converted original work done for prd.c for here.
This is needed if we want to support partitions, fdisk
calls this.
Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Signed-off-by: Boaz Harrosh <boaz@xxxxxxxxxxxxx>
---
drivers/block/brd.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index a10a0a9..3f07cb4 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -19,6 +19,7 @@
#include <linux/radix-tree.h>
#include <linux/fs.h>
#include <linux/slab.h>
+#include <linux/hdreg.h>
#include <asm/uaccess.h>
@@ -424,6 +425,15 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
return error;
}
+static int brd_getgeo(struct block_device *bd, struct hd_geometry *geo)
+{
+ /* some standard values */
+ geo->heads = 1 << 6;
+ geo->sectors = 1 << 5;
+ geo->cylinders = get_capacity(bd->bd_disk) >> 11;
+ return 0;
+}
+
static const struct block_device_operations brd_fops = {
.owner = THIS_MODULE,
.rw_page = brd_rw_page,
@@ -431,6 +441,7 @@ static const struct block_device_operations brd_fops = {
#ifdef CONFIG_BLK_DEV_XIP
.direct_access = brd_direct_access,
#endif
+ .getgeo = brd_getgeo,
};
/*
--
1.9.3
--
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