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xfs: enable sharing of realtime file blocks

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Update the remapping routines to be able to handle realtime files.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-11-20 16:21:00 -08:00
parent 26e97d9b4b
commit 5519251da0
1 changed files with 20 additions and 5 deletions
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25
fs/xfs/xfs_reflink.c
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@ -33,6 +33,7 @@
#include "xfs_rtrefcount_btree.h"
#include "xfs_rtalloc.h"
#include "xfs_rtgroup.h"
#include "xfs_metafile.h"
/*
* Copy on Write of Shared Blocks
@ -1187,14 +1188,28 @@ xfs_reflink_update_dest(
static int
xfs_reflink_ag_has_free_space(
struct xfs_mount *mp,
xfs_agnumber_t agno)
struct xfs_inode *ip,
xfs_fsblock_t fsb)
{
struct xfs_perag *pag;
xfs_agnumber_t agno;
int error = 0;
if (!xfs_has_rmapbt(mp))
return 0;
if (XFS_IS_REALTIME_INODE(ip)) {
struct xfs_rtgroup *rtg;
xfs_rgnumber_t rgno;
rgno = xfs_rtb_to_rgno(mp, fsb);
rtg = xfs_rtgroup_get(mp, rgno);
if (xfs_metafile_resv_critical(rtg_rmap(rtg)))
error = -ENOSPC;
xfs_rtgroup_put(rtg);
return error;
}
agno = XFS_FSB_TO_AGNO(mp, fsb);
pag = xfs_perag_get(mp, agno);
if (xfs_ag_resv_critical(pag, XFS_AG_RESV_RMAPBT) ||
xfs_ag_resv_critical(pag, XFS_AG_RESV_METADATA))
@ -1308,8 +1323,8 @@ xfs_reflink_remap_extent(
/* No reflinking if the AG of the dest mapping is low on space. */
if (dmap_written) {
error = xfs_reflink_ag_has_free_space(mp,
XFS_FSB_TO_AGNO(mp, dmap->br_startblock));
error = xfs_reflink_ag_has_free_space(mp, ip,
dmap->br_startblock);
if (error)
goto out_cancel;
}
@ -1568,8 +1583,8 @@ xfs_reflink_remap_prep(
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
/* Don't reflink realtime inodes */
if (XFS_IS_REALTIME_INODE(src) || XFS_IS_REALTIME_INODE(dest))
/* Can't reflink between data and rt volumes */
if (XFS_IS_REALTIME_INODE(src) != XFS_IS_REALTIME_INODE(dest))
goto out_unlock;
/* Don't share DAX file data with non-DAX file. */