Merge branch 'for-2.6.37/core' of git://git.kernel.dk/linux-2.6-block

[pandora-kernel.git] / include / linux / genhd.h

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index af3f06b..557c392 100644 (file)
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -12,6 +12,7 @@
 #include <linux/types.h>
 #include <linux/kdev_t.h>
 #include <linux/rcupdate.h>
+#include <linux/slab.h>
 
 #ifdef CONFIG_BLOCK
 
@@ -86,7 +87,15 @@ struct disk_stats {
        unsigned long io_ticks;
        unsigned long time_in_queue;
 };
-       
+
+#define PARTITION_META_INFO_VOLNAMELTH 64
+#define PARTITION_META_INFO_UUIDLTH    16
+
+struct partition_meta_info {
+       u8 uuid[PARTITION_META_INFO_UUIDLTH];   /* always big endian */
+       u8 volname[PARTITION_META_INFO_VOLNAMELTH];
+};
+
 struct hd_struct {
        sector_t start_sect;
        sector_t nr_sects;
@@ -95,6 +104,7 @@ struct hd_struct {
        struct device __dev;
        struct kobject *holder_dir;
        int policy, partno;
+       struct partition_meta_info *info;
 #ifdef CONFIG_FAIL_MAKE_REQUEST
        int make_it_fail;
 #endif
@@ -130,6 +140,7 @@ struct disk_part_tbl {
        struct rcu_head rcu_head;
        int len;
        struct hd_struct __rcu *last_lookup;
+       struct gendisk *disk;
        struct hd_struct __rcu *part[];
 };
 
@@ -181,6 +192,30 @@ static inline struct gendisk *part_to_disk(struct hd_struct *part)
        return NULL;
 }
 
+static inline void part_pack_uuid(const u8 *uuid_str, u8 *to)
+{
+       int i;
+       for (i = 0; i < 16; ++i) {
+               *to++ = (hex_to_bin(*uuid_str) << 4) |
+                       (hex_to_bin(*(uuid_str + 1)));
+               uuid_str += 2;
+               switch (i) {
+               case 3:
+               case 5:
+               case 7:
+               case 9:
+                       uuid_str++;
+                       continue;
+               }
+       }
+}
+
+static inline char *part_unpack_uuid(const u8 *uuid, char *out)
+{
+       sprintf(out, "%pU", uuid);
+       return out;
+}
+
 static inline int disk_max_parts(struct gendisk *disk)
 {
        if (disk->flags & GENHD_FL_EXT_DEVT)
@@ -342,6 +377,19 @@ static inline int part_in_flight(struct hd_struct *part)
        return part->in_flight[0] + part->in_flight[1];
 }
 
+static inline struct partition_meta_info *alloc_part_info(struct gendisk *disk)
+{
+       if (disk)
+               return kzalloc_node(sizeof(struct partition_meta_info),
+                                   GFP_KERNEL, disk->node_id);
+       return kzalloc(sizeof(struct partition_meta_info), GFP_KERNEL);
+}
+
+static inline void free_part_info(struct hd_struct *part)
+{
+       kfree(part->info);
+}
+
 /* block/blk-core.c */
 extern void part_round_stats(int cpu, struct hd_struct *part);
 
@@ -533,7 +581,9 @@ extern int disk_expand_part_tbl(struct gendisk *disk, int target);
 extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
 extern struct hd_struct * __must_check add_partition(struct gendisk *disk,
                                                     int partno, sector_t start,
-                                                    sector_t len, int flags);
+                                                    sector_t len, int flags,
+                                                    struct partition_meta_info
+                                                      *info);
 extern void delete_partition(struct gendisk *, int);
 extern void printk_all_partitions(void);