super.c (60696eb26a37ab0199f7833ddbc1b75138c36d16) super.c (cd913c76f489def1a388e3a5b10df94948ede3f5)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright(c) 2017 Intel Corporation. All rights reserved.
4 */
5#include <linux/pagemap.h>
6#include <linux/module.h>
7#include <linux/mount.h>
8#include <linux/pseudo_fs.h>

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64{
65 xa_erase(&dax_hosts, (unsigned long)disk);
66}
67EXPORT_SYMBOL_GPL(dax_remove_host);
68
69/**
70 * fs_dax_get_by_bdev() - temporary lookup mechanism for filesystem-dax
71 * @bdev: block device to find a dax_device for
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright(c) 2017 Intel Corporation. All rights reserved.
4 */
5#include <linux/pagemap.h>
6#include <linux/module.h>
7#include <linux/mount.h>
8#include <linux/pseudo_fs.h>

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64{
65 xa_erase(&dax_hosts, (unsigned long)disk);
66}
67EXPORT_SYMBOL_GPL(dax_remove_host);
68
69/**
70 * fs_dax_get_by_bdev() - temporary lookup mechanism for filesystem-dax
71 * @bdev: block device to find a dax_device for
72 * @start_off: returns the byte offset into the dax_device that @bdev starts
72 */
73 */
73struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev)
74struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev, u64 *start_off)
74{
75 struct dax_device *dax_dev;
75{
76 struct dax_device *dax_dev;
77 u64 part_size;
76 int id;
77
78 if (!blk_queue_dax(bdev->bd_disk->queue))
79 return NULL;
80
78 int id;
79
80 if (!blk_queue_dax(bdev->bd_disk->queue))
81 return NULL;
82
81 if ((get_start_sect(bdev) * SECTOR_SIZE) % PAGE_SIZE ||
82 (bdev_nr_sectors(bdev) * SECTOR_SIZE) % PAGE_SIZE) {
83 *start_off = get_start_sect(bdev) * SECTOR_SIZE;
84 part_size = bdev_nr_sectors(bdev) * SECTOR_SIZE;
85 if (*start_off % PAGE_SIZE || part_size % PAGE_SIZE) {
83 pr_info("%pg: error: unaligned partition for dax\n", bdev);
84 return NULL;
85 }
86
87 id = dax_read_lock();
88 dax_dev = xa_load(&dax_hosts, (unsigned long)bdev->bd_disk);
89 if (!dax_dev || !dax_alive(dax_dev) || !igrab(&dax_dev->inode))
90 dax_dev = NULL;

--- 400 unchanged lines hidden --- 		86 pr_info("%pg: error: unaligned partition for dax\n", bdev);
87 return NULL;
88 }
89
90 id = dax_read_lock();
91 dax_dev = xa_load(&dax_hosts, (unsigned long)bdev->bd_disk);
92 if (!dax_dev || !dax_alive(dax_dev) || !igrab(&dax_dev->inode))
93 dax_dev = NULL;

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