Remove the last user of ->bdev in dax.c by requiring the file system to
pass in an address that already includes the DAX offset. As part of the
only set ->bdev or ->daxdev when actually required in the ->iomap_begin
methods.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Gao Xiang <hsiangkao@xxxxxxxxxxxxxxxxx> [erofs]
---
fs/dax.c | 6 +-----
fs/erofs/data.c | 11 +++++++++--
fs/erofs/internal.h | 1 +
fs/ext2/inode.c | 8 ++++++--
fs/ext4/inode.c | 16 +++++++++++-----
fs/xfs/xfs_iomap.c | 10 ++++++++--
6 files changed, 36 insertions(+), 16 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index 148e8b0967f35..e0eecd8e3a8f8 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -711,11 +711,7 @@ int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
static pgoff_t dax_iomap_pgoff(const struct iomap *iomap, loff_t pos)
{
- phys_addr_t paddr = iomap->addr + (pos & PAGE_MASK) - iomap->offset;
-
- if (iomap->bdev)
- paddr += (get_start_sect(iomap->bdev) << SECTOR_SHIFT);
- return PHYS_PFN(paddr);
+ return PHYS_PFN(iomap->addr + (pos & PAGE_MASK) - iomap->offset);
}
static int copy_cow_page_dax(struct vm_fault *vmf, const struct iomap_iter *iter)
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 0e35ef3f9f3d7..9b1bb177ce303 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -159,6 +159,7 @@ int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
/* primary device by default */
map->m_bdev = sb->s_bdev;
map->m_daxdev = EROFS_SB(sb)->dax_dev;
+ map->m_dax_part_off = EROFS_SB(sb)->dax_part_off;
if (map->m_deviceid) {
down_read(&devs->rwsem);
@@ -169,6 +170,7 @@ int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
}
map->m_bdev = dif->bdev;
map->m_daxdev = dif->dax_dev;
+ map->m_dax_part_off = dif->dax_part_off;
up_read(&devs->rwsem);
} else if (devs->extra_devices) {
down_read(&devs->rwsem);
@@ -185,6 +187,7 @@ int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
map->m_pa -= startoff;
map->m_bdev = dif->bdev;
map->m_daxdev = dif->dax_dev;
+ map->m_dax_part_off = dif->dax_part_off;
break;
}
}
@@ -215,9 +218,13 @@ static int erofs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
if (ret)
return ret;
- iomap->bdev = mdev.m_bdev;
- iomap->dax_dev = mdev.m_daxdev;
iomap->offset = map.m_la;
+ if (flags & IOMAP_DAX) {
+ iomap->dax_dev = mdev.m_daxdev;
+ iomap->offset += mdev.m_dax_part_off;
+ } else {
+ iomap->bdev = mdev.m_bdev;
+ }
iomap->length = map.m_llen;
iomap->flags = 0;
iomap->private = NULL;
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index c1e65346e9f15..5c2a83876220c 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -438,6 +438,7 @@ static inline int z_erofs_map_blocks_iter(struct inode *inode,
struct erofs_map_dev {
struct block_device *m_bdev;
struct dax_device *m_daxdev;
+ u64 m_dax_part_off;
erofs_off_t m_pa;
unsigned int m_deviceid;
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 01d69618277de..602578b72d8c5 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -817,9 +817,11 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
return ret;
iomap->flags = 0;
- iomap->bdev = inode->i_sb->s_bdev;
iomap->offset = (u64)first_block << blkbits;
- iomap->dax_dev = sbi->s_daxdev;
+ if (flags & IOMAP_DAX)
+ iomap->dax_dev = sbi->s_daxdev;
+ else
+ iomap->bdev = inode->i_sb->s_bdev;
if (ret == 0) {
iomap->type = IOMAP_HOLE;
@@ -828,6 +830,8 @@ static int ext2_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
} else {
iomap->type = IOMAP_MAPPED;
iomap->addr = (u64)bno << blkbits;
+ if (flags & IOMAP_DAX)
+ iomap->addr += sbi->s_dax_part_off;
iomap->length = (u64)ret << blkbits;
iomap->flags |= IOMAP_F_MERGED;
}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 89c4a174bd393..ccafcbc146d3e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3272,7 +3272,7 @@ static bool ext4_inode_datasync_dirty(struct inode *inode)
static void ext4_set_iomap(struct inode *inode, struct iomap *iomap,
struct ext4_map_blocks *map, loff_t offset,
- loff_t length)
+ loff_t length, unsigned int flags)
{
u8 blkbits = inode->i_blkbits;
@@ -3289,8 +3289,10 @@ static void ext4_set_iomap(struct inode *inode, struct iomap *iomap,
if (map->m_flags & EXT4_MAP_NEW)
iomap->flags |= IOMAP_F_NEW;
- iomap->bdev = inode->i_sb->s_bdev;
- iomap->dax_dev = EXT4_SB(inode->i_sb)->s_daxdev;
+ if (flags & IOMAP_DAX)
+ iomap->dax_dev = EXT4_SB(inode->i_sb)->s_daxdev;
+ else
+ iomap->bdev = inode->i_sb->s_bdev;
iomap->offset = (u64) map->m_lblk << blkbits;
iomap->length = (u64) map->m_len << blkbits;
@@ -3310,9 +3312,13 @@ static void ext4_set_iomap(struct inode *inode, struct iomap *iomap,
if (map->m_flags & EXT4_MAP_UNWRITTEN) {
iomap->type = IOMAP_UNWRITTEN;
iomap->addr = (u64) map->m_pblk << blkbits;
+ if (flags & IOMAP_DAX)
+ iomap->addr += EXT4_SB(inode->i_sb)->s_dax_part_off;
} else if (map->m_flags & EXT4_MAP_MAPPED) {
iomap->type = IOMAP_MAPPED;
iomap->addr = (u64) map->m_pblk << blkbits;
+ if (flags & IOMAP_DAX)
+ iomap->addr += EXT4_SB(inode->i_sb)->s_dax_part_off;
} else {
iomap->type = IOMAP_HOLE;
iomap->addr = IOMAP_NULL_ADDR;
@@ -3421,7 +3427,7 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
if (ret < 0)
return ret;
out:
- ext4_set_iomap(inode, iomap, &map, offset, length);
+ ext4_set_iomap(inode, iomap, &map, offset, length, flags);
return 0;
}
@@ -3541,7 +3547,7 @@ static int ext4_iomap_begin_report(struct inode *inode, loff_t offset,
delalloc = ext4_iomap_is_delalloc(inode, &map);
set_iomap:
- ext4_set_iomap(inode, iomap, &map, offset, length);
+ ext4_set_iomap(inode, iomap, &map, offset, length, flags);
if (delalloc && iomap->type == IOMAP_HOLE)
iomap->type = IOMAP_DELALLOC;
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 0ed3e7674353b..e552ce541ec2d 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -71,15 +71,21 @@ xfs_bmbt_to_iomap(
iomap->type = IOMAP_DELALLOC;
} else {
iomap->addr = BBTOB(xfs_fsb_to_db(ip, imap->br_startblock));
+ if (mapping_flags & IOMAP_DAX)
+ iomap->addr += target->bt_dax_part_off;
+
if (imap->br_state == XFS_EXT_UNWRITTEN)
iomap->type = IOMAP_UNWRITTEN;
else
iomap->type = IOMAP_MAPPED;
+
}
iomap->offset = XFS_FSB_TO_B(mp, imap->br_startoff);
iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount);
- iomap->bdev = target->bt_bdev;
- iomap->dax_dev = target->bt_daxdev;
+ if (mapping_flags & IOMAP_DAX)
+ iomap->dax_dev = target->bt_daxdev;
+ else
+ iomap->bdev = target->bt_bdev;
iomap->flags = iomap_flags;
if (xfs_ipincount(ip) &&
--
2.30.2
--
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