block: Add invalidate_disk() helper to invalidate the gendisk
To hide internal implementation and simplify some driver code, this adds a helper to invalidate the gendisk. It will clean the gendisk's associated buffer/page caches and reset its internal states. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210922123711.187-2-xieyongji@bytedance.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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2 changed files with 22 additions and 0 deletions
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@ -624,6 +624,26 @@ void del_gendisk(struct gendisk *disk)
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}
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}
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EXPORT_SYMBOL(del_gendisk);
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EXPORT_SYMBOL(del_gendisk);
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/**
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* invalidate_disk - invalidate the disk
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* @disk: the struct gendisk to invalidate
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*
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* A helper to invalidates the disk. It will clean the disk's associated
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* buffer/page caches and reset its internal states so that the disk
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* can be reused by the drivers.
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*
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* Context: can sleep
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*/
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void invalidate_disk(struct gendisk *disk)
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{
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struct block_device *bdev = disk->part0;
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invalidate_bdev(bdev);
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bdev->bd_inode->i_mapping->wb_err = 0;
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set_capacity(disk, 0);
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}
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EXPORT_SYMBOL(invalidate_disk);
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/* sysfs access to bad-blocks list. */
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/* sysfs access to bad-blocks list. */
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static ssize_t disk_badblocks_show(struct device *dev,
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static ssize_t disk_badblocks_show(struct device *dev,
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struct device_attribute *attr,
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struct device_attribute *attr,
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@ -213,6 +213,8 @@ static inline int add_disk(struct gendisk *disk)
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}
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}
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extern void del_gendisk(struct gendisk *gp);
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extern void del_gendisk(struct gendisk *gp);
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void invalidate_disk(struct gendisk *disk);
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void set_disk_ro(struct gendisk *disk, bool read_only);
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void set_disk_ro(struct gendisk *disk, bool read_only);
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static inline int get_disk_ro(struct gendisk *disk)
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static inline int get_disk_ro(struct gendisk *disk)
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