dmraid/dmraid-1.0.0.rc13-geometry.patch

99 lines
2.2 KiB
Diff

Index: 1.0.0.rc15/lib/activate/devmapper.c
===================================================================
--- 1.0.0.rc15.orig/lib/activate/devmapper.c 2008-06-20 18:03:04.000000000 +0200
+++ 1.0.0.rc15/lib/activate/devmapper.c 2008-09-24 16:20:58.000000000 +0200
@@ -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)
@@ -216,6 +292,10 @@ dm_create(struct lib_context *lc, struct
/* Create <dev_name> */
ret = run_task(lc, rs, table, DM_DEVICE_CREATE);
+ /* Set geometry */
+ if (ret)
+ set_geometry(lc, rs);
+
/*
* In case device creation failed, check if target
* isn't registered with the device-mapper core