Enforce a minimum SG_IO timeout

[linux-2.6-omap-h63xx.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b4fe68fe3a573b8b0e94a4c17153c76880a06f01..031a315c0509e5aa9eaa73c080b7e76a44dc95a0 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -662,6 +662,7 @@ extern unsigned long blk_max_low_pfn, blk_max_pfn;
  * default timeout for SG_IO if none specified
  */
 #define BLK_DEFAULT_SG_TIMEOUT (60 * HZ)
+#define BLK_MIN_SG_TIMEOUT     (7 * HZ)
 
 #ifdef CONFIG_BOUNCE
 extern int init_emergency_isa_pool(void);
@@ -717,10 +718,10 @@ extern void blk_plug_device(struct request_queue *);
 extern void blk_plug_device_unlocked(struct request_queue *);
 extern int blk_remove_plug(struct request_queue *);
 extern void blk_recount_segments(struct request_queue *, struct bio *);
-extern int scsi_cmd_ioctl(struct file *, struct request_queue *,
-                         struct gendisk *, unsigned int, void __user *);
-extern int sg_scsi_ioctl(struct file *, struct request_queue *,
-               struct gendisk *, struct scsi_ioctl_command __user *);
+extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
+                         unsigned int, void __user *);
+extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
+                        struct scsi_ioctl_command __user *);
 
 /*
  * Temporary export, until SCSI gets fixed up.
@@ -786,6 +787,8 @@ static inline void blk_run_address_space(struct address_space *mapping)
                blk_run_backing_dev(mapping->backing_dev_info, NULL);
 }
 
+extern void blkdev_dequeue_request(struct request *req);
+
 /*
  * blk_end_request() and friends.
  * __blk_end_request() and end_request() must be called with
@@ -820,11 +823,6 @@ extern void blk_update_request(struct request *rq, int error,
 extern unsigned int blk_rq_bytes(struct request *rq);
 extern unsigned int blk_rq_cur_bytes(struct request *rq);
 
-static inline void blkdev_dequeue_request(struct request *req)
-{
-       elv_dequeue_request(req->q, req);
-}
-
 /*
  * Access functions for manipulating queue properties
  */
@@ -910,7 +908,8 @@ static inline int sb_issue_discard(struct super_block *sb,
 * command filter functions
 */
 extern int blk_verify_command(struct blk_cmd_filter *filter,
-                             unsigned char *cmd, int has_write_perm);
+                             unsigned char *cmd, fmode_t has_write_perm);
+extern void blk_unregister_filter(struct gendisk *disk);
 extern void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter);
 
 #define MAX_PHYS_SEGMENTS 128
@@ -920,6 +919,8 @@ extern void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter);
 
 #define MAX_SEGMENT_SIZE       65536
 
+#define BLK_SEG_BOUNDARY_MASK  0xFFFFFFFFUL
+
 #define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist)
 
 static inline int queue_hardsect_size(struct request_queue *q)
@@ -1056,6 +1057,22 @@ static inline int blk_integrity_rq(struct request *rq)
 
 #endif /* CONFIG_BLK_DEV_INTEGRITY */
 
+struct block_device_operations {
+       int (*open) (struct block_device *, fmode_t);
+       int (*release) (struct gendisk *, fmode_t);
+       int (*locked_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
+       int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
+       int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
+       int (*direct_access) (struct block_device *, sector_t,
+                                               void **, unsigned long *);
+       int (*media_changed) (struct gendisk *);
+       int (*revalidate_disk) (struct gendisk *);
+       int (*getgeo)(struct block_device *, struct hd_geometry *);
+       struct module *owner;
+};
+
+extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
+                                unsigned long);
 #else /* CONFIG_BLOCK */
 /*
  * stubs for when the block layer is configured out