mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-04 10:56:06 -04:00
Code Issues Packages Projects Releases Wiki Activity

btrfs: factor out scratching of one regular super block

Browse Source 
btrfs_scratch_superblocks open codes scratching super block of a
non-zoned super block.  Split the code to read, zero and write the
superblock for regular devices into a separate helper.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig
2022-11-21 18:47:48 +01:00
committed by David Sterba
parent 09e44868f1
commit 0e0078f72b
1 changed files with 26 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
fs/btrfs/volumes.c
View File

@@ -2014,42 +2014,43 @@ static u64 btrfs_num_devices(struct btrfs_fs_info *fs_info)
return num_devices;
}
static void btrfs_scratch_superblock(struct btrfs_fs_info *fs_info,
struct block_device *bdev, int copy_num)
{
struct btrfs_super_block *disk_super;
struct page *page;
int ret;
disk_super = btrfs_read_dev_one_super(bdev, copy_num, false);
if (IS_ERR(disk_super))
return;
memset(&disk_super->magic, 0, sizeof(disk_super->magic));
page = virt_to_page(disk_super);
set_page_dirty(page);
lock_page(page);
/* write_on_page() unlocks the page */
ret = write_one_page(page);
if (ret)
btrfs_warn(fs_info, "error clearing superblock number %d (%d)",
copy_num, ret);
btrfs_release_disk_super(disk_super);
}
void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
struct block_device *bdev,
const char *device_path)
{
struct btrfs_super_block *disk_super;
int copy_num;
if (!bdev)
return;
for (copy_num = 0; copy_num < BTRFS_SUPER_MIRROR_MAX; copy_num++) {
struct page *page;
int ret;
disk_super = btrfs_read_dev_one_super(bdev, copy_num, false);
if (IS_ERR(disk_super))
continue;
if (bdev_is_zoned(bdev)) {
if (bdev_is_zoned(bdev))
btrfs_reset_sb_log_zones(bdev, copy_num);
continue;
}
memset(&disk_super->magic, 0, sizeof(disk_super->magic));
page = virt_to_page(disk_super);
set_page_dirty(page);
lock_page(page);
/* write_on_page() unlocks the page */
ret = write_one_page(page);
if (ret)
btrfs_warn(fs_info,
"error clearing superblock number %d (%d)",
copy_num, ret);
btrfs_release_disk_super(disk_super);
else
btrfs_scratch_superblock(fs_info, bdev, copy_num);
}
/* Notify udev that device has changed */