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block: implement async io_uring zone reset all

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Add a new BLOCK_URING_CMD_ZONE_RESET_ALL uring cmd to reset all zones
for a given block device.  This can be used by storage systems or
file system mkfs tools to initialize multiple devices in parallel.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://patch.msgid.link/20260804125038.740388-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2026-08-04 05:50:22 -07:00
committed by Jens Axboe
parent b3c5f8d05e
commit ca8f6548e6
2 changed files with 38 additions and 0 deletions
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37
block/ioctl.c
View File

@@ -14,6 +14,7 @@
#include <linux/pagemap.h>
#include <linux/io_uring/cmd.h>
#include <linux/blk-integrity.h>
#include <trace/events/block.h>
#include <uapi/linux/blkdev.h>
#include "blk.h"
#include "blk-crypto-internal.h"
@@ -943,6 +944,40 @@ static int blkdev_cmd_discard(struct io_uring_cmd *cmd)
return -EIOCBQUEUED;
}
static int blkdev_cmd_zone_reset_all(struct io_uring_cmd *cmd)
{
struct blk_iou_cmd *bic = io_uring_cmd_to_pdu(cmd, struct blk_iou_cmd);
struct block_device *bdev = I_BDEV(cmd->file->f_mapping->host);
struct bio *bio;
int err;
if (!(file_to_blk_mode(cmd->file) & BLK_OPEN_WRITE))
return -EBADF;
if (bdev_read_only(bdev))
return -EPERM;
if (!bdev_is_zoned(bdev))
return -EOPNOTSUPP;
if (bic->start || bic->len)
return -EINVAL;
err = filemap_invalidate_pages(bdev->bd_mapping, 0,
bdev_nr_bytes(bdev) - 1, bic->nowait);
if (err)
return err;
bio = bio_alloc(bdev, 0, REQ_OP_ZONE_RESET_ALL,
bic->nowait ? GFP_NOWAIT : GFP_KERNEL);
if (!bio)
return -EAGAIN;
if (bic->nowait)
bio->bi_opf |= REQ_NOWAIT;
trace_blkdev_zone_mgmt(bio, 0);
bio->bi_private = cmd;
bio->bi_end_io = bio_cmd_bio_end_io;
submit_bio(bio);
return -EIOCBQUEUED;
}
int blkdev_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags)
{
struct blk_iou_cmd *bic = io_uring_cmd_to_pdu(cmd, struct blk_iou_cmd);
@@ -966,6 +1001,8 @@ int blkdev_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags)
switch (cmd_op) {
case BLOCK_URING_CMD_DISCARD:
return blkdev_cmd_discard(cmd);
case BLOCK_URING_CMD_ZONE_RESET_ALL:
return blkdev_cmd_zone_reset_all(cmd);
}
return -EINVAL;
}

1
include/uapi/linux/blkdev.h
View File

@@ -10,5 +10,6 @@
* It's a different number space from ioctl(), reuse the block's code 0x12.
*/
#define BLOCK_URING_CMD_DISCARD _IO(0x12, 0)
#define BLOCK_URING_CMD_ZONE_RESET_ALL _IO(0x12, 1)
#endif