blk-mq: really fix plug list flushing for nomerge queues

[linux-2.6-block.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 669e419d62347e2965bdaffbf8e960e1e34af4f9..3d9cf326574fbb423de0c02617cddb464d6b4156 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -433,8 +433,6 @@ struct request_queue {
        /*
         * for flush operations
         */
-       unsigned int            flush_flags;
-       unsigned int            flush_not_queueable:1;
        struct blk_flush_queue  *fq;
 
        struct list_head        requeue_list;
@@ -491,6 +489,9 @@ struct request_queue {
 #define QUEUE_FLAG_INIT_DONE   20      /* queue is initialized */
 #define QUEUE_FLAG_NO_SG_MERGE 21      /* don't attempt to merge SG segments*/
 #define QUEUE_FLAG_POLL               22       /* IO polling enabled if set */
+#define QUEUE_FLAG_WC         23       /* Write back caching */
+#define QUEUE_FLAG_FUA        24       /* device supports FUA writes */
+#define QUEUE_FLAG_FLUSH_NQ    25      /* flush not queueuable */
 
 #define QUEUE_FLAG_DEFAULT     ((1 << QUEUE_FLAG_IO_STAT) |            \
                                 (1 << QUEUE_FLAG_STACKABLE)    |       \
@@ -767,6 +768,17 @@ static inline void rq_flush_dcache_pages(struct request *rq)
 }
 #endif
 
+#ifdef CONFIG_PRINTK
+#define vfs_msg(sb, level, fmt, ...)                           \
+       __vfs_msg(sb, level, fmt, ##__VA_ARGS__)
+#else
+#define vfs_msg(sb, level, fmt, ...)                           \
+do {                                                           \
+       no_printk(fmt, ##__VA_ARGS__);                          \
+       __vfs_msg(sb, "", " ");                                 \
+} while (0)
+#endif
+
 extern int blk_register_queue(struct gendisk *disk);
 extern void blk_unregister_queue(struct gendisk *disk);
 extern blk_qc_t generic_make_request(struct bio *bio);
@@ -779,7 +791,7 @@ extern struct request *blk_make_request(struct request_queue *, struct bio *,
 extern void blk_rq_set_block_pc(struct request *);
 extern void blk_requeue_request(struct request_queue *, struct request *);
 extern void blk_add_request_payload(struct request *rq, struct page *page,
-               unsigned int len);
+               int offset, unsigned int len);
 extern int blk_lld_busy(struct request_queue *q);
 extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
                             struct bio_set *bs, gfp_t gfp_mask,
@@ -1007,8 +1019,8 @@ extern void blk_queue_update_dma_alignment(struct request_queue *, int);
 extern void blk_queue_softirq_done(struct request_queue *, softirq_done_fn *);
 extern void blk_queue_rq_timed_out(struct request_queue *, rq_timed_out_fn *);
 extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
-extern void blk_queue_flush(struct request_queue *q, unsigned int flush);
 extern void blk_queue_flush_queueable(struct request_queue *q, bool queueable);
+extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
 
 extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
@@ -1128,6 +1140,8 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
 extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *);
 extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
                sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
+extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
+               sector_t nr_sects, gfp_t gfp_mask, int type, struct bio **biop);
 extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
                sector_t nr_sects, gfp_t gfp_mask, struct page *page);
 extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
@@ -1363,7 +1377,7 @@ static inline unsigned int block_size(struct block_device *bdev)
 
 static inline bool queue_flush_queueable(struct request_queue *q)
 {
-       return !q->flush_not_queueable;
+       return !test_bit(QUEUE_FLAG_FLUSH_NQ, &q->queue_flags);
 }
 
 typedef struct {struct page *v;} Sector;
@@ -1657,7 +1671,7 @@ struct block_device_operations {
        int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        long (*direct_access)(struct block_device *, sector_t, void __pmem **,
-                       pfn_t *);
+                       pfn_t *, long);
        unsigned int (*check_events) (struct gendisk *disk,
                                      unsigned int clearing);
        /* ->media_changed() is DEPRECATED, use ->check_events() instead */
@@ -1677,6 +1691,8 @@ extern int bdev_read_page(struct block_device *, sector_t, struct page *);
 extern int bdev_write_page(struct block_device *, sector_t, struct page *,
                                                struct writeback_control *);
 extern long bdev_direct_access(struct block_device *, struct blk_dax_ctl *);
+extern int bdev_dax_supported(struct super_block *, int);
+extern bool bdev_dax_capable(struct block_device *);
 #else /* CONFIG_BLOCK */
 
 struct block_device;