blk_revalidate_disk_zones

函数名称：lk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps*@disk: Target disk* Helper function for low-level device drivers to (re) allocate and initialize* a disk request queue zone bitmaps. This functions should normally be called

函数原型：int blk_revalidate_disk_zones(struct gendisk *disk)

返回类型：int

参数：

类型	参数	名称
struct gendisk *	disk

437

q等于queue

438

struct blk_revalidate_zone_args args = {disk = disk, }

444

如果WARN_ON_ONCE(!blk_queue_is_zoned(q))则返回:负EIO

446

如果WARN_ON_ONCE(!queue_is_mq(q))则返回:负EIO

453

noio_flag等于memalloc_noio_save - Marks implicit GFP_NOIO allocation scope

454

ret等于report_zones(disk, 0, UINT_MAX, Helper function to check the validity of zones of a zoned block device., & args)

456

memalloc_noio_restore - Ends the implicit GFP_NOIO scope.*@flags: Flags to restore.* Ends the implicit GFP_NOIO scope started by memalloc_noio_save function.* Always make sure that that the given flags is the return value from the

463

blk_mq_freeze_queue(q)

464

如果ret大于等于0则

465

lk_queue_chunk_sectors - set size of the chunk for this queue*@q: the request queue for the device*@chunk_sectors: chunk sectors in the usual 512b unit* Description:* If a driver doesn't want IOs to cross a given chunk size, it can set

466

* Zoned block device information for request dispatch control. * nr_zones is the total number of zones of the device. This is always * 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones * bits which indicates if a zone is conventional (等于nr_zones

467

swap - swap values of @a and @b*@a: first value*@b: second value(seq_zones_wlock, seq_zones_wlock)

468

swap - swap values of @a and @b*@a: first value*@b: second value(conv_zones_bitmap, conv_zones_bitmap)

469

ret等于0

470

否则

471

打印警告信息("%s: failed to revalidate zones\n", name of major driver )

472

blk_queue_free_zone_bitmaps(q)

474

blk_mq_unfreeze_queue(q)

476

477

478

返回:ret

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