block: make partition array dynamic

[h-e-n] / include / linux / genhd.h

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index c90e1b4..ecf649c 100644 (file)
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -113,6 +113,21 @@ struct hd_struct {
 #define GENHD_FL_UP                            16
 #define GENHD_FL_SUPPRESS_PARTITION_INFO       32
 
+#define BLK_SCSI_MAX_CMDS      (256)
+#define BLK_SCSI_CMD_PER_LONG  (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
+
+struct blk_scsi_cmd_filter {
+       unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
+       unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
+       struct kobject kobj;
+};
+
+struct disk_part_tbl {
+       struct rcu_head rcu_head;
+       int len;
+       struct hd_struct *part[];
+};
+
 struct gendisk {
        /* major, first_minor, minors and ext_minors are input
         * parameters only, don't use directly.  Use disk_devt() and
@@ -131,7 +146,7 @@ struct gendisk {
         * non-critical accesses use RCU.  Always access through
         * helpers.
         */
-       struct hd_struct **__part;
+       struct disk_part_tbl *part_tbl;
        struct hd_struct part0;
 
        struct block_device_operations *fops;
@@ -149,6 +164,7 @@ struct gendisk {
 #ifdef  CONFIG_BLK_DEV_INTEGRITY
        struct blk_integrity *integrity;
 #endif
+       int node_id;
 };
 
 static inline struct gendisk *part_to_disk(struct hd_struct *part)
@@ -503,6 +519,7 @@ extern void blk_free_devt(dev_t devt);
 extern dev_t blk_lookup_devt(const char *name, int partno);
 extern char *disk_name (struct gendisk *hd, int partno, char *buf);
 
+extern int disk_expand_part_tbl(struct gendisk *disk, int target);
 extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
 extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int);
 extern void delete_partition(struct gendisk *, int);