add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/nvdimm/blk.c
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@@ -1,15 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * NVDIMM Block Window Driver
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  * Copyright (c) 2014, Intel Corporation.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms and conditions of the GNU General Public License,
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- * version 2, as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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  */
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 #include <linux/blkdev.h>
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@@ -170,10 +162,10 @@
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 	return err;
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 }
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-static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
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+static blk_qc_t nd_blk_submit_bio(struct bio *bio)
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 {
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 	struct bio_integrity_payload *bip;
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-	struct nd_namespace_blk *nsblk;
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+	struct nd_namespace_blk *nsblk = bio->bi_disk->private_data;
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 	struct bvec_iter iter;
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 	unsigned long start;
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 	struct bio_vec bvec;
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@@ -184,9 +176,10 @@
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 		return BLK_QC_T_NONE;
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 	bip = bio_integrity(bio);
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-	nsblk = q->queuedata;
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 	rw = bio_data_dir(bio);
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-	do_acct = nd_iostat_start(bio, &start);
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+	do_acct = blk_queue_io_stat(bio->bi_disk->queue);
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+	if (do_acct)
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+		start = bio_start_io_acct(bio);
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 	bio_for_each_segment(bvec, bio, iter) {
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 		unsigned int len = bvec.bv_len;
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@@ -203,7 +196,7 @@
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 		}
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 	}
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 	if (do_acct)
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-		nd_iostat_end(bio, start);
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+		bio_end_io_acct(bio, start);
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 	bio_endio(bio);
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 	return BLK_QC_T_NONE;
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@@ -232,7 +225,7 @@
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 static const struct block_device_operations nd_blk_fops = {
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 	.owner = THIS_MODULE,
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-	.revalidate_disk = nvdimm_revalidate_disk,
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+	.submit_bio =  nd_blk_submit_bio,
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 };
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 static void nd_blk_release_queue(void *q)
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@@ -257,17 +250,15 @@
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 	internal_nlba = div_u64(nsblk->size, nsblk_internal_lbasize(nsblk));
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 	available_disk_size = internal_nlba * nsblk_sector_size(nsblk);
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-	q = blk_alloc_queue(GFP_KERNEL);
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+	q = blk_alloc_queue(NUMA_NO_NODE);
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 	if (!q)
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 		return -ENOMEM;
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 	if (devm_add_action_or_reset(dev, nd_blk_release_queue, q))
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 		return -ENOMEM;
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-	blk_queue_make_request(q, nd_blk_make_request);
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 	blk_queue_max_hw_sectors(q, UINT_MAX);
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 	blk_queue_logical_block_size(q, nsblk_sector_size(nsblk));
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 	blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
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-	q->queuedata = nsblk;
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 	disk = alloc_disk(0);
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 	if (!disk)
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@@ -277,6 +268,7 @@
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 	disk->fops		= &nd_blk_fops;
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 	disk->queue		= q;
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 	disk->flags		= GENHD_FL_EXT_DEVT;
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+	disk->private_data	= nsblk;
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 	nvdimm_namespace_disk_name(&nsblk->common, disk->disk_name);
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 	if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))
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@@ -290,8 +282,8 @@
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 	}
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 	set_capacity(disk, available_disk_size >> SECTOR_SHIFT);
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-	device_add_disk(dev, disk);
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-	revalidate_disk(disk);
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+	device_add_disk(dev, disk, NULL);
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+	nvdimm_check_and_set_ro(disk);
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 	return 0;
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 }
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