Commit a1548b67 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: move rescan_partitions to fs/block_dev.c 



Large parts of rescan_partitions aren't about partitions, and
moving it to block_dev.c will allow for some further cleanups by
merging it into its only caller.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6917d068

block/partition-generic.c

+2 −35
Original line number Diff line number Diff line
@@ -439,7 +439,7 @@ static bool disk_unlock_native_capacity(struct gendisk *disk) 
	}

}



static int drop_partitions(struct gendisk *disk, struct block_device *bdev)

int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)

{

	struct disk_part_iter piter;

	struct hd_struct *part;
@@ -509,7 +509,7 @@ static bool blk_add_partition(struct gendisk *disk, struct block_device *bdev, 
	return true;

}



static int blk_add_partitions(struct gendisk *disk, struct block_device *bdev)

int blk_add_partitions(struct gendisk *disk, struct block_device *bdev)

{

	struct parsed_partitions *state;

	int ret = -EAGAIN, p, highest;
@@ -576,39 +576,6 @@ out_free_state: 
	return ret;

}



int rescan_partitions(struct gendisk *disk, struct block_device *bdev,

		bool invalidate)

{

	int ret;



rescan:

	ret = drop_partitions(disk, bdev);

	if (ret)

		return ret;



	if (invalidate)

		set_capacity(disk, 0);

	else if (disk->fops->revalidate_disk)

		disk->fops->revalidate_disk(disk);



	check_disk_size_change(disk, bdev, !invalidate);

	bdev->bd_invalidated = 0;



	if (!get_capacity(disk)) {

		/*

		 * Tell userspace that the media / partition table may have

		 * changed.

		 */

		kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);

		return 0;

	}



	ret = blk_add_partitions(disk, bdev);

	if (ret == -EAGAIN)

		goto rescan;

	return ret;

}



unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)

{

	struct address_space *mapping = bdev->bd_inode->i_mapping;

fs/block_dev.c

+36 −2
Original line number Diff line number Diff line
@@ -1416,8 +1416,8 @@ static void flush_disk(struct block_device *bdev, bool kill_dirty) 
 * and adjusts it if it differs. When shrinking the bdev size, its all caches

 * are freed.

 */

void check_disk_size_change(struct gendisk *disk, struct block_device *bdev,

		bool verbose)

static void check_disk_size_change(struct gendisk *disk,

		struct block_device *bdev, bool verbose)

{

	loff_t disk_size, bdev_size;
@@ -1508,6 +1508,40 @@ EXPORT_SYMBOL(bd_set_size); 


static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);



static int rescan_partitions(struct gendisk *disk, struct block_device *bdev,

		bool invalidate)

{

	int ret;



rescan:

	ret = blk_drop_partitions(disk, bdev);

	if (ret)

		return ret;



	if (invalidate)

		set_capacity(disk, 0);

	else if (disk->fops->revalidate_disk)

		disk->fops->revalidate_disk(disk);



	check_disk_size_change(disk, bdev, !invalidate);

	bdev->bd_invalidated = 0;



	if (!get_capacity(disk)) {

		/*

		 * Tell userspace that the media / partition table may have

		 * changed.

		 */

		kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);

		return 0;

	}



	ret = blk_add_partitions(disk, bdev);

	if (ret == -EAGAIN)

		goto rescan;

	return ret;

}





static void bdev_disk_changed(struct block_device *bdev, bool invalidate)

{

	if (disk_part_scan_enabled(bdev->bd_disk)) {

include/linux/fs.h

+0 −2
Original line number Diff line number Diff line
@@ -2703,8 +2703,6 @@ extern void make_bad_inode(struct inode *); 
extern bool is_bad_inode(struct inode *);



#ifdef CONFIG_BLOCK

extern void check_disk_size_change(struct gendisk *disk,

		struct block_device *bdev, bool verbose);

extern int revalidate_disk(struct gendisk *);

extern int check_disk_change(struct block_device *);

extern int __invalidate_device(struct block_device *, bool);

include/linux/genhd.h

+2 −2
Original line number Diff line number Diff line
@@ -621,9 +621,9 @@ extern void blk_invalidate_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);



int blk_add_partitions(struct gendisk *disk, struct block_device *bdev);

int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev);

extern int disk_expand_part_tbl(struct gendisk *disk, int target);

int rescan_partitions(struct gendisk *disk, struct block_device *bdev,

		bool invalidate);

extern struct hd_struct * __must_check add_partition(struct gendisk *disk,

						     int partno, sector_t start,

						     sector_t len, int flags,

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