#define GD_NATIVE_CAPACITY 3
#define GD_ADDED 4
#define GD_SUPPRESS_PART_SCAN 5
+#define GD_OWNS_QUEUE 6
struct mutex open_mutex; /* open/close mutex */
unsigned open_partitions; /* number of open partitions */
struct badblocks *bb;
struct lockdep_map lockdep_map;
u64 diskseq;
+
+ /*
+ * Independent sector access ranges. This is always NULL for
+ * devices that do not have multiple independent access ranges.
+ */
+ struct blk_independent_access_ranges *ia_ranges;
};
static inline bool disk_live(struct gendisk *disk)
*/
struct blk_independent_access_range {
struct kobject kobj;
- struct request_queue *queue;
sector_t sector;
sector_t nr_sectors;
};
unsigned long nr_requests; /* Max # of requests */
unsigned int dma_pad_mask;
+ /*
+ * Drivers that set dma_alignment to less than 511 must be prepared to
+ * handle individual bvec's that are not a multiple of a SECTOR_SIZE
+ * due to possible offsets.
+ */
unsigned int dma_alignment;
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
#endif /* CONFIG_BLK_DEV_ZONED */
int node;
- struct mutex debugfs_mutex;
#ifdef CONFIG_BLK_DEV_IO_TRACE
struct blk_trace __rcu *blk_trace;
#endif
struct bio_set bio_split;
struct dentry *debugfs_dir;
-
-#ifdef CONFIG_BLK_DEBUG_FS
struct dentry *sched_debugfs_dir;
struct dentry *rqos_debugfs_dir;
-#endif
-
- bool mq_sysfs_init_done;
-
/*
- * Independent sector access ranges. This is always NULL for
- * devices that do not have multiple independent access ranges.
+ * Serializes all debugfs metadata operations using the above dentries.
*/
- struct blk_independent_access_ranges *ia_ranges;
+ struct mutex debugfs_mutex;
+
+ bool mq_sysfs_init_done;
/**
* @srcu: Sleepable RCU. Use as lock when type of the request queue
#define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */
#define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */
#define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */
-#define QUEUE_FLAG_DEAD 13 /* queue tear-down finished */
#define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */
#define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */
#define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */
#define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags)
#define blk_queue_dying(q) test_bit(QUEUE_FLAG_DYING, &(q)->queue_flags)
#define blk_queue_has_srcu(q) test_bit(QUEUE_FLAG_HAS_SRCU, &(q)->queue_flags)
-#define blk_queue_dead(q) test_bit(QUEUE_FLAG_DEAD, &(q)->queue_flags)
#define blk_queue_init_done(q) test_bit(QUEUE_FLAG_INIT_DONE, &(q)->queue_flags)
#define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags)
#define blk_queue_noxmerges(q) \
int bdev_disk_changed(struct gendisk *disk, bool invalidate);
-struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id,
- struct lock_class_key *lkclass);
void put_disk(struct gendisk *disk);
struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass);
\
__blk_alloc_disk(node_id, &__key); \
})
-void blk_cleanup_disk(struct gendisk *disk);
int __register_blkdev(unsigned int major, const char *name,
void (*probe)(dev_t devt));
return bdev->bd_queue; /* this is never NULL */
}
-#ifdef CONFIG_BLK_DEV_ZONED
-
/* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */
const char *blk_zone_cond_str(enum blk_zone_cond zone_cond);
return blk_queue_zone_is_seq(bdev_get_queue(bio->bi_bdev),
bio->bi_iter.bi_sector);
}
-#endif /* CONFIG_BLK_DEV_ZONED */
-
-static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
- int op)
-{
- if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
- return min(q->limits.max_discard_sectors,
- UINT_MAX >> SECTOR_SHIFT);
-
- if (unlikely(op == REQ_OP_WRITE_ZEROES))
- return q->limits.max_write_zeroes_sectors;
-
- return q->limits.max_sectors;
-}
/*
- * Return maximum size of a request at given offset. Only valid for
- * file system requests.
+ * Return how much of the chunk is left to be used for I/O at a given offset.
*/
-static inline unsigned int blk_max_size_offset(struct request_queue *q,
- sector_t offset,
- unsigned int chunk_sectors)
-{
- if (!chunk_sectors) {
- if (q->limits.chunk_sectors)
- chunk_sectors = q->limits.chunk_sectors;
- else
- return q->limits.max_sectors;
- }
-
- if (likely(is_power_of_2(chunk_sectors)))
- chunk_sectors -= offset & (chunk_sectors - 1);
- else
- chunk_sectors -= sector_div(offset, chunk_sectors);
-
- return min(q->limits.max_sectors, chunk_sectors);
+static inline unsigned int blk_chunk_sectors_left(sector_t offset,
+ unsigned int chunk_sectors)
+{
+ if (unlikely(!is_power_of_2(chunk_sectors)))
+ return chunk_sectors - sector_div(offset, chunk_sectors);
+ return chunk_sectors - (offset & (chunk_sectors - 1));
}
/*
* Access functions for manipulating queue properties
*/
-extern void blk_cleanup_queue(struct request_queue *);
void blk_queue_bounce_limit(struct request_queue *q, enum blk_bounce limit);
extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int);
extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int);
return q ? q->dma_alignment : 511;
}
+static inline unsigned int bdev_dma_alignment(struct block_device *bdev)
+{
+ return queue_dma_alignment(bdev_get_queue(bdev));
+}
+
+static inline bool bdev_iter_is_aligned(struct block_device *bdev,
+ struct iov_iter *iter)
+{
+ return iov_iter_is_aligned(iter, bdev_dma_alignment(bdev),
+ bdev_logical_block_size(bdev) - 1);
+}
+
static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
unsigned int len)
{
projects / linux-2.6-microblaze.git / blobdiff