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authorChristoph Hellwig <hch@lst.de>2020-03-25 16:48:41 +0100
committerJens Axboe <axboe@kernel.dk>2020-03-25 09:50:08 -0600
commit581e26004a09c50e5017caadc850ea17e374a5ee (patch)
tree5210d9e7df10307ddc96c613c39464e847983268 /block
parent29125ed624eeb3ac2eb7bca313a8de29c1c84dcd (diff)
downloadlinux-sh-581e26004a09c50e5017caadc850ea17e374a5ee.tar.gz
block: move block layer internals out of include/linux/genhd.h
None of this needs to be exposed to drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk.h116
-rw-r--r--block/ioctl.c1
-rw-r--r--block/partitions/check.h1
-rw-r--r--block/partitions/core.c1
4 files changed, 118 insertions, 1 deletions
diff --git a/block/blk.h b/block/blk.h
index 43df9dcb3d4e..ac20f972842e 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -149,6 +149,9 @@ static inline bool integrity_req_gap_front_merge(struct request *req,
return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1],
bip_next->bip_vec[0].bv_offset);
}
+
+void blk_integrity_add(struct gendisk *);
+void blk_integrity_del(struct gendisk *);
#else /* CONFIG_BLK_DEV_INTEGRITY */
static inline bool integrity_req_gap_back_merge(struct request *req,
struct bio *next)
@@ -171,6 +174,12 @@ static inline bool bio_integrity_endio(struct bio *bio)
static inline void bio_integrity_free(struct bio *bio)
{
}
+static inline void blk_integrity_add(struct gendisk *disk)
+{
+}
+static inline void blk_integrity_del(struct gendisk *disk)
+{
+}
#endif /* CONFIG_BLK_DEV_INTEGRITY */
unsigned long blk_rq_timeout(unsigned long timeout);
@@ -365,4 +374,111 @@ void blk_queue_free_zone_bitmaps(struct request_queue *q);
static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {}
#endif
+void part_dec_in_flight(struct request_queue *q, struct hd_struct *part,
+ int rw);
+void part_inc_in_flight(struct request_queue *q, struct hd_struct *part,
+ int rw);
+void update_io_ticks(struct hd_struct *part, unsigned long now, bool end);
+struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector);
+
+int blk_alloc_devt(struct hd_struct *part, dev_t *devt);
+void blk_free_devt(dev_t devt);
+void blk_invalidate_devt(dev_t devt);
+char *disk_name(struct gendisk *hd, int partno, char *buf);
+#define ADDPART_FLAG_NONE 0
+#define ADDPART_FLAG_RAID 1
+#define ADDPART_FLAG_WHOLEDISK 2
+struct hd_struct *__must_check add_partition(struct gendisk *disk, int partno,
+ sector_t start, sector_t len, int flags,
+ struct partition_meta_info *info);
+void __delete_partition(struct percpu_ref *ref);
+void delete_partition(struct gendisk *disk, int partno);
+int disk_expand_part_tbl(struct gendisk *disk, int target);
+
+static inline int hd_ref_init(struct hd_struct *part)
+{
+ if (percpu_ref_init(&part->ref, __delete_partition, 0,
+ GFP_KERNEL))
+ return -ENOMEM;
+ return 0;
+}
+
+static inline void hd_struct_get(struct hd_struct *part)
+{
+ percpu_ref_get(&part->ref);
+}
+
+static inline int hd_struct_try_get(struct hd_struct *part)
+{
+ return percpu_ref_tryget_live(&part->ref);
+}
+
+static inline void hd_struct_put(struct hd_struct *part)
+{
+ percpu_ref_put(&part->ref);
+}
+
+static inline void hd_struct_kill(struct hd_struct *part)
+{
+ percpu_ref_kill(&part->ref);
+}
+
+static inline void hd_free_part(struct hd_struct *part)
+{
+ free_part_stats(part);
+ kfree(part->info);
+ percpu_ref_exit(&part->ref);
+}
+
+/*
+ * Any access of part->nr_sects which is not protected by partition
+ * bd_mutex or gendisk bdev bd_mutex, should be done using this
+ * accessor function.
+ *
+ * Code written along the lines of i_size_read() and i_size_write().
+ * CONFIG_PREEMPTION case optimizes the case of UP kernel with preemption
+ * on.
+ */
+static inline sector_t part_nr_sects_read(struct hd_struct *part)
+{
+#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
+ sector_t nr_sects;
+ unsigned seq;
+ do {
+ seq = read_seqcount_begin(&part->nr_sects_seq);
+ nr_sects = part->nr_sects;
+ } while (read_seqcount_retry(&part->nr_sects_seq, seq));
+ return nr_sects;
+#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
+ sector_t nr_sects;
+
+ preempt_disable();
+ nr_sects = part->nr_sects;
+ preempt_enable();
+ return nr_sects;
+#else
+ return part->nr_sects;
+#endif
+}
+
+/*
+ * Should be called with mutex lock held (typically bd_mutex) of partition
+ * to provide mutual exlusion among writers otherwise seqcount might be
+ * left in wrong state leaving the readers spinning infinitely.
+ */
+static inline void part_nr_sects_write(struct hd_struct *part, sector_t size)
+{
+#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
+ write_seqcount_begin(&part->nr_sects_seq);
+ part->nr_sects = size;
+ write_seqcount_end(&part->nr_sects_seq);
+#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
+ preempt_disable();
+ part->nr_sects = size;
+ preempt_enable();
+#else
+ part->nr_sects = size;
+#endif
+}
+
#endif /* BLK_INTERNAL_H */
diff --git a/block/ioctl.c b/block/ioctl.c
index 127194b9f9bd..6e827de1a4c4 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -11,6 +11,7 @@
#include <linux/blktrace_api.h>
#include <linux/pr.h>
#include <linux/uaccess.h>
+#include "blk.h"
static int blkpg_do_ioctl(struct block_device *bdev,
struct blkpg_partition __user *upart, int op)
diff --git a/block/partitions/check.h b/block/partitions/check.h
index f845355489ec..c577e9ee67f0 100644
--- a/block/partitions/check.h
+++ b/block/partitions/check.h
@@ -2,6 +2,7 @@
#include <linux/pagemap.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>
+#include "../blk.h"
/*
* add_gd_partition adds a partitions details to the devices partition
diff --git a/block/partitions/core.c b/block/partitions/core.c
index b442bc209b86..b79c4513629b 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -10,7 +10,6 @@
#include <linux/vmalloc.h>
#include <linux/blktrace_api.h>
#include <linux/raid/detect.h>
-#include "../blk.h"
#include "check.h"
static int (*check_part[])(struct parsed_partitions *) = {