linux-kernel - [PATCH 2/6] pmem: Add support for getgeo()

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Date:	Mon, 16 Mar 2015 15:12:56 -0600
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	linux-nvdimm@...ts.01.org, linux-fsdevel@...r.kernel.org,
	axboe@...nel.dk, hch@...radead.org, riel@...hat.com
Subject: [PATCH 2/6] pmem: Add support for getgeo()

Some programs require HDIO_GETGEO work, which requires we implement
getgeo.  Based off of the work done to the NVMe driver in this commit:

commit 4cc09e2dc4cb ("NVMe: Add getgeo to block ops")

Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc: linux-nvdimm@...ts.01.org
Cc: linux-fsdevel@...r.kernel.org
Cc: axboe@...nel.dk
Cc: hch@...radead.org
Cc: riel@...hat.com
---
 drivers/block/pmem.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/block/pmem.c b/drivers/block/pmem.c
index d366b9b..60bbe0d 100644
--- a/drivers/block/pmem.c
+++ b/drivers/block/pmem.c
@@ -50,6 +50,15 @@ struct pmem_device {
 	size_t			size;
 };
 
+static int pmem_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;
+}
+
 /*
  * direct translation from (pmem,sector) => void*
  * We do not require that sector be page aligned.
@@ -176,6 +185,7 @@ out:
 
 static const struct block_device_operations pmem_fops = {
 	.owner =		THIS_MODULE,
+	.getgeo =		pmem_getgeo,
 };
 
 /* Kernel module stuff */
-- 
1.9.3

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