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authorChristoph Hellwig <hch@lst.de>2021-11-29 11:21:59 +0100
committerDan Williams <dan.j.williams@intel.com>2021-12-04 17:58:54 +0100
commitcd913c76f489def1a388e3a5b10df94948ede3f5 (patch)
treed144a96b23dd0ea4064702c2f5e06d4fe6258680 /fs/ext4
parentiomap: add a IOMAP_DAX flag (diff)
downloadlinux-cd913c76f489def1a388e3a5b10df94948ede3f5.tar.xz
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dax: return the partition offset from fs_dax_get_by_bdev
Prepare for the removal of the block_device from the DAX I/O path by returning the partition offset from fs_dax_get_by_bdev so that the file systems have it at hand for use during I/O. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20211129102203.2243509-26-hch@lst.de Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ext4.h1
-rw-r--r--fs/ext4/super.c2
2 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 404dd50856e5..9cc55bcda6ba 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1697,6 +1697,7 @@ struct ext4_sb_info {
*/
struct percpu_rw_semaphore s_writepages_rwsem;
struct dax_device *s_daxdev;
+ u64 s_dax_part_off;
#ifdef CONFIG_EXT4_DEBUG
unsigned long s_simulate_fail;
#endif
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8d7e3449c647..56228e33e52a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3913,7 +3913,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
if (!sbi->s_blockgroup_lock)
goto out_free_base;
- sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev);
+ sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off);
sb->s_fs_info = sbi;
sbi->s_sb = sb;
sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;