File dmraid-1.0.0.rc13-geometry.patch of Package dmraid

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File dmraid-1.0.0.rc13-geometry.patch of Package dmraid

---
 lib/activate/devmapper.c |   80 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

--- 1.0.0.rc16.orig/lib/activate/devmapper.c
+++ 1.0.0.rc16/lib/activate/devmapper.c
@@ -207,6 +207,82 @@ run_task(struct lib_context *lc, struct 
 	return ret;
 }
 
+int get_edd_value(unsigned long *value, const char *path)
+{
+	FILE *file;
+	unsigned long v;
+
+	file = fopen(path, "r");
+	if (file == NULL)
+		return 0;
+
+	if (fscanf(file, "%lu", &v) == 0) {
+		fclose(file);
+		return 0;
+	}
+	fclose(file);
+
+	*value = v;
+	return 1;
+}
+
+#define EDD_PREFIX "/sys/firmware/edd/int13_dev80/"
+
+int getgeo_edd(unsigned long *cylinders,
+	       unsigned long *heads,
+	       unsigned long *sectors)
+{
+	int res;
+	unsigned long c, h, s;
+
+	res = get_edd_value(&c, EDD_PREFIX "legacy_max_cylinder") &&
+		get_edd_value(&h, EDD_PREFIX "legacy_max_head") &&
+		get_edd_value(&s, EDD_PREFIX "legacy_sectors_per_track");
+
+	if (!res)
+		return 0;
+
+	*cylinders = c;
+	*heads = h;
+	*sectors = s;
+
+	return 1;
+}
+
+/* Set the geometry of the device */
+int set_geometry(struct lib_context *lc, struct raid_set *rs)
+{
+	int ret;
+	struct dm_task *dmt;
+	unsigned long c, h, sec, st;
+	char cyl[10], heads[10], sectors[10], start[10];
+
+	st = 0;
+	if (!getgeo_edd(&c, &h, &sec)) {
+		/* default */
+		c = 16383;
+		h = 16;
+		sec = 63;
+	}
+
+	snprintf(cyl, 10, "%lu", c);
+	snprintf(heads, 10, "%lu", h);
+	snprintf(sectors, 10, "%lu", sec);
+	snprintf(start, 10, "%lu", st);
+
+	_init_dm();
+	ret = (dmt = dm_task_create(DM_DEVICE_SET_GEOMETRY)) &&
+		dm_task_set_name(dmt, rs->name) &&
+		dm_task_set_geometry(dmt, cyl, heads, sectors, start);
+
+	if (ret)
+		ret = dm_task_run(dmt);
+
+	_exit_dm(dmt);
+
+	return ret;
+}
+
 /* Create a mapped device. */
 int
 dm_create(struct lib_context *lc, struct raid_set *rs, char *table, char *name)
@@ -216,6 +292,10 @@ dm_create(struct lib_context *lc, struct
 	/* Create <dev_name> */
 	ret = run_task(lc, rs, table, DM_DEVICE_CREATE, name);
 
+	/* Set geometry */
+	if (ret)
+		set_geometry(lc, rs);
+
 	/*
 	 * In case device creation failed, check if target
 	 * isn't registered with the device-mapper core

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File dmraid-1.0.0.rc13-geometry.patch of Package dmraid

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