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xfs: add a xfs_inode_buftarg helper 

Add a new xfs_inode_buftarg helper that gets the data I/O buftarg for a
given inode.  Replace the existing xfs_find_bdev_for_inode and
xfs_find_daxdev_for_inode helpers with this new general one and cleanup
some of the callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-10-24 22:25:38 -07:00 committed by Darrick J. Wong
parent 25a409572b
commit 30fa529e3b
8 changed files with 38 additions and 55 deletions
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34
fs/xfs/xfs_aops.c
View File

@ -30,32 +30,6 @@ XFS_WPC(struct iomap_writepage_ctx *ctx)
return container_of(ctx, struct xfs_writepage_ctx, ctx);
}
struct block_device *
xfs_find_bdev_for_inode(
struct inode *inode)
{
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
if (XFS_IS_REALTIME_INODE(ip))
return mp->m_rtdev_targp->bt_bdev;
else
return mp->m_ddev_targp->bt_bdev;
}
struct dax_device *
xfs_find_daxdev_for_inode(
struct inode *inode)
{
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
if (XFS_IS_REALTIME_INODE(ip))
return mp->m_rtdev_targp->bt_daxdev;
else
return mp->m_ddev_targp->bt_daxdev;
}
/*
* Fast and loose check if this write could update the on-disk inode size.
*/
@ -609,9 +583,11 @@ xfs_dax_writepages(
struct address_space *mapping,
struct writeback_control *wbc)
{
xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED);
struct xfs_inode *ip = XFS_I(mapping->host);
xfs_iflags_clear(ip, XFS_ITRUNCATED);
return dax_writeback_mapping_range(mapping,
xfs_find_bdev_for_inode(mapping->host), wbc);
xfs_inode_buftarg(ip)->bt_bdev, wbc);
}
STATIC sector_t
@ -661,7 +637,7 @@ xfs_iomap_swapfile_activate(
struct file *swap_file,
sector_t *span)
{
sis->bdev = xfs_find_bdev_for_inode(file_inode(swap_file));
sis->bdev = xfs_inode_buftarg(XFS_I(file_inode(swap_file)))->bt_bdev;
return iomap_swapfile_activate(sis, swap_file, span,
&xfs_read_iomap_ops);
}

3
fs/xfs/xfs_aops.h
View File

@ -11,7 +11,4 @@ extern const struct address_space_operations xfs_dax_aops;
int xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
extern struct block_device *xfs_find_bdev_for_inode(struct inode *);
extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *);
#endif /* __XFS_AOPS_H__ */

15
fs/xfs/xfs_bmap_util.c
View File

@ -53,15 +53,16 @@ xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
*/
int
xfs_zero_extent(
struct xfs_inode *ip,
xfs_fsblock_t start_fsb,
xfs_off_t count_fsb)
struct xfs_inode *ip,
xfs_fsblock_t start_fsb,
xfs_off_t count_fsb)
{
struct xfs_mount *mp = ip->i_mount;
xfs_daddr_t sector = xfs_fsb_to_db(ip, start_fsb);
sector_t block = XFS_BB_TO_FSBT(mp, sector);
struct xfs_mount *mp = ip->i_mount;
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
xfs_daddr_t sector = xfs_fsb_to_db(ip, start_fsb);
sector_t block = XFS_BB_TO_FSBT(mp, sector);
return blkdev_issue_zeroout(xfs_find_bdev_for_inode(VFS_I(ip)),
return blkdev_issue_zeroout(target->bt_bdev,
block << (mp->m_super->s_blocksize_bits - 9),
count_fsb << (mp->m_super->s_blocksize_bits - 9),
GFP_NOFS, 0);

14
fs/xfs/xfs_file.c
View File

@ -1229,22 +1229,22 @@ static const struct vm_operations_struct xfs_file_vm_ops = {
STATIC int
xfs_file_mmap(
struct file *filp,
struct vm_area_struct *vma)
struct file *file,
struct vm_area_struct *vma)
{
struct dax_device *dax_dev;
struct inode *inode = file_inode(file);
struct xfs_buftarg *target = xfs_inode_buftarg(XFS_I(inode));
dax_dev = xfs_find_daxdev_for_inode(file_inode(filp));
/*
* We don't support synchronous mappings for non-DAX files and
* for DAX files if underneath dax_device is not synchronous.
*/
if (!daxdev_mapping_supported(vma, dax_dev))
if (!daxdev_mapping_supported(vma, target->bt_daxdev))
return -EOPNOTSUPP;
file_accessed(filp);
file_accessed(file);
vma->vm_ops = &xfs_file_vm_ops;
if (IS_DAX(file_inode(filp)))
if (IS_DAX(inode))
vma->vm_flags |= VM_HUGEPAGE;
return 0;
}

7
fs/xfs/xfs_inode.h
View File

@ -219,6 +219,13 @@ static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
return ip->i_cowfp && ip->i_cowfp->if_bytes;
}
/*
* Return the buftarg used for data allocations on a given inode.
*/
#define xfs_inode_buftarg(ip) \
(XFS_IS_REALTIME_INODE(ip) ? \
(ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
/*
* In-core inode flags.
*/

7
fs/xfs/xfs_ioctl.c
View File

@ -1311,10 +1311,9 @@ xfs_ioctl_setattr_dax_invalidate(
* have to check the device for dax support or flush pagecache.
*/
if (fa->fsx_xflags & FS_XFLAG_DAX) {
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
return -EINVAL;
if (!bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
sb->s_blocksize))
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
if (!bdev_dax_supported(target->bt_bdev, sb->s_blocksize))
return -EINVAL;
}

11
fs/xfs/xfs_iomap.c
View File

@ -57,6 +57,7 @@ xfs_bmbt_to_iomap(
u16 flags)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock)))
return xfs_alert_fsblock_zero(ip, imap);
@ -77,8 +78,8 @@ xfs_bmbt_to_iomap(
}
iomap->offset = XFS_FSB_TO_B(mp, imap->br_startoff);
iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount);
iomap->bdev = xfs_find_bdev_for_inode(VFS_I(ip));
iomap->dax_dev = xfs_find_daxdev_for_inode(VFS_I(ip));
iomap->bdev = target->bt_bdev;
iomap->dax_dev = target->bt_daxdev;
iomap->flags = flags;
if (xfs_ipincount(ip) &&
@ -94,12 +95,14 @@ xfs_hole_to_iomap(
xfs_fileoff_t offset_fsb,
xfs_fileoff_t end_fsb)
{
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
iomap->addr = IOMAP_NULL_ADDR;
iomap->type = IOMAP_HOLE;
iomap->offset = XFS_FSB_TO_B(ip->i_mount, offset_fsb);
iomap->length = XFS_FSB_TO_B(ip->i_mount, end_fsb - offset_fsb);
iomap->bdev = xfs_find_bdev_for_inode(VFS_I(ip));
iomap->dax_dev = xfs_find_daxdev_for_inode(VFS_I(ip));
iomap->bdev = target->bt_bdev;
iomap->dax_dev = target->bt_daxdev;
}
static inline xfs_fileoff_t

2
fs/xfs/xfs_iops.c
View File

@ -1227,7 +1227,7 @@ xfs_inode_supports_dax(
return false;
/* Device has to support DAX too. */
return xfs_find_daxdev_for_inode(VFS_I(ip)) != NULL;
return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
}
STATIC void