From db429e9ec0f9dee2d8e50c154f04f29f880fc9d6 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sun, 7 Jun 2009 13:52:52 +0200 Subject: partitions: add ->set_capacity block device method * Add ->set_capacity block device method and use it in rescan_partitions() to attempt enabling native capacity of the device upon detecting the partition which exceeds device capacity. * Add GENHD_FL_NATIVE_CAPACITY flag to try limit attempts of enabling native capacity during partition scan. Together with the consecutive patch implementing ->set_capacity method in ide-gd device driver this allows automatic disabling of Host Protected Area (HPA) if any partitions overlapping HPA are detected. Cc: Robert Hancock Cc: Frans Pop Cc: "Andries E. Brouwer" Acked-by: Al Viro Emphatically-Acked-by: Alan Cox Signed-off-by: Bartlomiej Zolnierkiewicz --- include/linux/blkdev.h | 2 ++ include/linux/genhd.h | 1 + 2 files changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 6f841fb1be30..a2d7298be351 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1106,6 +1106,8 @@ struct block_device_operations { int (*direct_access) (struct block_device *, sector_t, void **, unsigned long *); int (*media_changed) (struct gendisk *); + unsigned long long (*set_capacity) (struct gendisk *, + unsigned long long); int (*revalidate_disk) (struct gendisk *); int (*getgeo)(struct block_device *, struct hd_geometry *); struct module *owner; diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 634c53028fb8..239e24b081a9 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -113,6 +113,7 @@ struct hd_struct { #define GENHD_FL_UP 16 #define GENHD_FL_SUPPRESS_PARTITION_INFO 32 #define GENHD_FL_EXT_DEVT 64 /* allow extended devt */ +#define GENHD_FL_NATIVE_CAPACITY 128 #define BLK_SCSI_MAX_CMDS (256) #define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8)) -- cgit v1.2.3