X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fgenhd.h;h=e439e6aed832f3fc98b3a7944521f108e5740fbb;hb=31d85ab28e71b0c938e0ef48af45747e80d99b53;hp=4411bdd671dd1cea308fe36370f3d0442bc0165a;hpb=b7db9956e57c8151b930d5e5fe5c766e6aad3ff7;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 4411bdd..e439e6a 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -25,9 +25,6 @@ extern struct device_type part_type;
 extern struct kobject *block_depr;
 extern struct class block_class;
 
-extern const struct seq_operations partitions_op;
-extern const struct seq_operations diskstats_op;
-
 enum {
 /* These three have identical behaviour; use the second one if DOS FDISK gets
    confused about extended/logical partitions starting past cylinder 1023. */
@@ -58,6 +55,9 @@ enum {
 	UNIXWARE_PARTITION = 0x63,	/* Same as GNU_HURD and SCO Unix */
 };
 
+#define DISK_MAX_PARTS			256
+#define DISK_NAME_LEN			32
+
 #include <linux/major.h>
 #include <linux/device.h>
 #include <linux/smp.h>
@@ -112,27 +112,40 @@ struct hd_struct {
 #define GENHD_FL_CD				8
 #define GENHD_FL_UP				16
 #define GENHD_FL_SUPPRESS_PARTITION_INFO	32
-#define GENHD_FL_FAIL				64
+#define GENHD_FL_EXT_DEVT			64 /* allow extended devt */
+
+#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
-	 * disk_max_parts().
+	/* major, first_minor and minors are input parameters only,
+	 * don't use directly.  Use disk_devt() and disk_max_parts().
 	 */
 	int major;			/* major number of driver */
 	int first_minor;
 	int minors;                     /* maximum number of minors, =1 for
                                          * disks that can't be partitioned. */
-	int ext_minors;			/* number of extended dynamic minors */
 
-	char disk_name[32];		/* name of major driver */
+	char disk_name[DISK_NAME_LEN];	/* name of major driver */
 
 	/* Array of pointers to partitions indexed by partno.
 	 * Protected with matching bdev lock but stat and other
 	 * 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;
@@ -141,23 +154,16 @@ struct gendisk {
 
 	int flags;
 	struct device *driverfs_dev;  // FIXME: remove
-	struct kobject *holder_dir;
 	struct kobject *slave_dir;
 
 	struct timer_rand_state *random;
 
 	atomic_t sync_io;		/* RAID */
-	unsigned long stamp;
-	int in_flight;
-#ifdef	CONFIG_SMP
-	struct disk_stats *dkstats;
-#else
-	struct disk_stats dkstats;
-#endif
 	struct work_struct async_notify;
 #ifdef  CONFIG_BLK_DEV_INTEGRITY
 	struct blk_integrity *integrity;
 #endif
+	int node_id;
 };
 
 static inline struct gendisk *part_to_disk(struct hd_struct *part)
@@ -173,7 +179,9 @@ static inline struct gendisk *part_to_disk(struct hd_struct *part)
 
 static inline int disk_max_parts(struct gendisk *disk)
 {
-	return disk->minors + disk->ext_minors;
+	if (disk->flags & GENHD_FL_EXT_DEVT)
+		return DISK_MAX_PARTS;
+	return disk->minors;
 }
 
 static inline bool disk_partitionable(struct gendisk *disk)
@@ -234,46 +242,18 @@ extern struct hd_struct *disk_map_sector_rcu(struct gendisk *disk,
  * internal use only.
  */
 #ifdef	CONFIG_SMP
-#define disk_stat_lock()	({ rcu_read_lock(); get_cpu(); })
-#define disk_stat_unlock()	do { put_cpu(); rcu_read_unlock(); } while (0)
-
-#define disk_stat_add(cpu, gendiskp, field, addnd)			\
-	(per_cpu_ptr(gendiskp->dkstats, cpu)->field += addnd)
-
-#define disk_stat_read(gendiskp, field)					\
-({									\
-	typeof(gendiskp->dkstats->field) res = 0;			\
-	int i;								\
-	for_each_possible_cpu(i)					\
-		res += per_cpu_ptr(gendiskp->dkstats, i)->field;	\
-	res;								\
-})
-
-static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
-{
-	int i;
+#define part_stat_lock()	({ rcu_read_lock(); get_cpu(); })
+#define part_stat_unlock()	do { put_cpu(); rcu_read_unlock(); } while (0)
 
-	for_each_possible_cpu(i)
-		memset(per_cpu_ptr(gendiskp->dkstats, i), value,
-				sizeof(struct disk_stats));
-}		
-
-#define part_stat_add(cpu, part, field, addnd)				\
-	(per_cpu_ptr(part->dkstats, cpu)->field += addnd)
-
-#define all_stat_add(cpu, gendiskp, part, field, addnd, sector)		\
-({									\
-	if (part)							\
-		part_stat_add(cpu, part, field, addnd);			\
-	disk_stat_add(cpu, gendiskp, field, addnd);			\
-})
+#define __part_stat_add(cpu, part, field, addnd)			\
+	(per_cpu_ptr((part)->dkstats, (cpu))->field += (addnd))
 
 #define part_stat_read(part, field)					\
 ({									\
-	typeof(part->dkstats->field) res = 0;				\
+	typeof((part)->dkstats->field) res = 0;				\
 	int i;								\
 	for_each_possible_cpu(i)					\
-		res += per_cpu_ptr(part->dkstats, i)->field;		\
+		res += per_cpu_ptr((part)->dkstats, i)->field;		\
 	res;								\
 })
 
@@ -286,109 +266,73 @@ static inline void part_stat_set_all(struct hd_struct *part, int value)
 				sizeof(struct disk_stats));
 }
 
-#else /* !CONFIG_SMP */
-#define disk_stat_lock()	({ rcu_read_lock(); 0; })
-#define disk_stat_unlock()	rcu_read_unlock()
-
-#define disk_stat_add(cpu, gendiskp, field, addnd)			\
-	(gendiskp->dkstats.field += addnd)
-#define disk_stat_read(gendiskp, field)	(gendiskp->dkstats.field)
-
-static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
+static inline int init_part_stats(struct hd_struct *part)
 {
-	memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));
+	part->dkstats = alloc_percpu(struct disk_stats);
+	if (!part->dkstats)
+		return 0;
+	return 1;
 }
 
-#define part_stat_add(cpu, part, field, addnd)				\
-	(part->dkstats.field += addnd)
-
-#define all_stat_add(cpu, gendiskp, part, field, addnd, sector)		\
-({									\
-	if (part)							\
-		part_stat_add(cpu, part, field, addnd);			\
-	disk_stat_add(cpu, gendiskp, field, addnd);			\
-})
-
-#define part_stat_read(part, field)	(part->dkstats.field)
-
-static inline void part_stat_set_all(struct hd_struct *part, int value)
+static inline void free_part_stats(struct hd_struct *part)
 {
-	memset(&part->dkstats, value, sizeof(struct disk_stats));
+	free_percpu(part->dkstats);
 }
 
-#endif /* CONFIG_SMP */
-
-#define disk_stat_dec(cpu, gendiskp, field)				\
-	disk_stat_add(cpu, gendiskp, field, -1)
-#define disk_stat_inc(cpu, gendiskp, field)				\
-	disk_stat_add(cpu, gendiskp, field, 1)
-#define disk_stat_sub(cpu, gendiskp, field, subnd)			\
-	disk_stat_add(cpu, gendiskp, field, -subnd)
-
-#define part_stat_dec(cpu, gendiskp, field)				\
-	part_stat_add(cpu, gendiskp, field, -1)
-#define part_stat_inc(cpu, gendiskp, field)				\
-	part_stat_add(cpu, gendiskp, field, 1)
-#define part_stat_sub(cpu, gendiskp, field, subnd)			\
-	part_stat_add(cpu, gendiskp, field, -subnd)
+#else /* !CONFIG_SMP */
+#define part_stat_lock()	({ rcu_read_lock(); 0; })
+#define part_stat_unlock()	rcu_read_unlock()
 
-#define all_stat_dec(cpu, gendiskp, field, sector)			\
-	all_stat_add(cpu, gendiskp, field, -1, sector)
-#define all_stat_inc(cpu, gendiskp, part, field, sector)		\
-	all_stat_add(cpu, gendiskp, part, field, 1, sector)
-#define all_stat_sub(cpu, gendiskp, part, field, subnd, sector)		\
-	all_stat_add(cpu, gendiskp, part, field, -subnd, sector)
+#define __part_stat_add(cpu, part, field, addnd)				\
+	((part)->dkstats.field += addnd)
 
-/* Inlines to alloc and free disk stats in struct gendisk */
-#ifdef  CONFIG_SMP
-static inline int init_disk_stats(struct gendisk *disk)
-{
-	disk->dkstats = alloc_percpu(struct disk_stats);
-	if (!disk->dkstats)
-		return 0;
-	return 1;
-}
+#define part_stat_read(part, field)	((part)->dkstats.field)
 
-static inline void free_disk_stats(struct gendisk *disk)
+static inline void part_stat_set_all(struct hd_struct *part, int value)
 {
-	free_percpu(disk->dkstats);
+	memset(&part->dkstats, value, sizeof(struct disk_stats));
 }
 
 static inline int init_part_stats(struct hd_struct *part)
 {
-	part->dkstats = alloc_percpu(struct disk_stats);
-	if (!part->dkstats)
-		return 0;
 	return 1;
 }
 
 static inline void free_part_stats(struct hd_struct *part)
 {
-	free_percpu(part->dkstats);
 }
 
-#else	/* CONFIG_SMP */
-static inline int init_disk_stats(struct gendisk *disk)
-{
-	return 1;
-}
+#endif /* CONFIG_SMP */
 
-static inline void free_disk_stats(struct gendisk *disk)
-{
-}
+#define part_stat_add(cpu, part, field, addnd)	do {			\
+	__part_stat_add((cpu), (part), field, addnd);			\
+	if ((part)->partno)						\
+		__part_stat_add((cpu), &part_to_disk((part))->part0,	\
+				field, addnd);				\
+} while (0)
 
-static inline int init_part_stats(struct hd_struct *part)
+#define part_stat_dec(cpu, gendiskp, field)				\
+	part_stat_add(cpu, gendiskp, field, -1)
+#define part_stat_inc(cpu, gendiskp, field)				\
+	part_stat_add(cpu, gendiskp, field, 1)
+#define part_stat_sub(cpu, gendiskp, field, subnd)			\
+	part_stat_add(cpu, gendiskp, field, -subnd)
+
+static inline void part_inc_in_flight(struct hd_struct *part)
 {
-	return 1;
+	part->in_flight++;
+	if (part->partno)
+		part_to_disk(part)->part0.in_flight++;
 }
 
-static inline void free_part_stats(struct hd_struct *part)
+static inline void part_dec_in_flight(struct hd_struct *part)
 {
+	part->in_flight--;
+	if (part->partno)
+		part_to_disk(part)->part0.in_flight--;
 }
-#endif	/* CONFIG_SMP */
 
 /* drivers/block/ll_rw_blk.c */
-extern void disk_round_stats(int cpu, struct gendisk *disk);
 extern void part_round_stats(int cpu, struct hd_struct *part);
 
 /* drivers/block/genhd.c */
@@ -413,7 +357,7 @@ extern void rand_initialize_disk(struct gendisk *disk);
 
 static inline sector_t get_start_sect(struct block_device *bdev)
 {
-	return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect;
+	return bdev->bd_part->start_sect;
 }
 static inline sector_t get_capacity(struct gendisk *disk)
 {
@@ -576,6 +520,7 @@ 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);
@@ -583,9 +528,6 @@ extern void printk_all_partitions(void);
 
 extern struct gendisk *alloc_disk_node(int minors, int node_id);
 extern struct gendisk *alloc_disk(int minors);
-extern struct gendisk *alloc_disk_ext_node(int minors, int ext_minrs,
-					   int node_id);
-extern struct gendisk *alloc_disk_ext(int minors, int ext_minors);
 extern struct kobject *get_disk(struct gendisk *disk);
 extern void put_disk(struct gendisk *disk);
 extern void blk_register_region(dev_t devt, unsigned long range,
@@ -597,6 +539,15 @@ extern void blk_unregister_region(dev_t devt, unsigned long range);
 
 extern ssize_t part_size_show(struct device *dev,
 			      struct device_attribute *attr, char *buf);
+extern ssize_t part_stat_show(struct device *dev,
+			      struct device_attribute *attr, char *buf);
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+extern ssize_t part_fail_show(struct device *dev,
+			      struct device_attribute *attr, char *buf);
+extern ssize_t part_fail_store(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf, size_t count);
+#endif /* CONFIG_FAIL_MAKE_REQUEST */
 
 #else /* CONFIG_BLOCK */