From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Teach mkfs to set the DAX flag on the root directory so that all new
files can be created in dax mode. This is a complement to removing the
mount option.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
---
v2: minor tweak to manpage text
---
man/man8/mkfs.xfs.8 | 10 ++++++++++
mkfs/xfs_mkfs.c | 14 ++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/man/man8/mkfs.xfs.8 b/man/man8/mkfs.xfs.8
index 7d3f3552ff12..0a7858748457 100644
--- a/man/man8/mkfs.xfs.8
+++ b/man/man8/mkfs.xfs.8
@@ -398,6 +398,16 @@ will have this extent size hint applied.
The value must be provided in units of filesystem blocks.
Directories will pass on this hint to newly created regular files and
directories.
+.TP
+.BI daxinherit= value
+If set, all inodes created by
+.B mkfs.xfs
+will be created with the DAX flag set.
+Directories will pass on this flag to newly created regular files and
+directories.
+By default,
+.B mkfs.xfs
+will not enable DAX mode.
.RE
.TP
.B \-f
diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index 2e6cd280e388..a687f385a9c1 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -60,6 +60,7 @@ enum {
D_PROJINHERIT,
D_EXTSZINHERIT,
D_COWEXTSIZE,
+ D_DAXINHERIT,
D_MAX_OPTS,
};
@@ -254,6 +255,7 @@ static struct opt_params dopts = {
[D_PROJINHERIT] = "projinherit",
[D_EXTSZINHERIT] = "extszinherit",
[D_COWEXTSIZE] = "cowextsize",
+ [D_DAXINHERIT] = "daxinherit",
},
.subopt_params = {
{ .index = D_AGCOUNT,
@@ -369,6 +371,12 @@ static struct opt_params dopts = {
.maxval = UINT_MAX,
.defaultval = SUBOPT_NEEDS_VAL,
},
+ { .index = D_DAXINHERIT,
+ .conflicts = { { NULL, LAST_CONFLICT } },
+ .minval = 0,
+ .maxval = 1,
+ .defaultval = 1,
+ },
},
};
@@ -1434,6 +1442,12 @@ data_opts_parser(
cli->fsx.fsx_cowextsize = getnum(value, opts, subopt);
cli->fsx.fsx_xflags |= FS_XFLAG_COWEXTSIZE;
break;
+ case D_DAXINHERIT:
+ if (getnum(value, opts, subopt))
+ cli->fsx.fsx_xflags |= FS_XFLAG_DAX;
+ else
+ cli->fsx.fsx_xflags &= ~FS_XFLAG_DAX;
+ break;
default:
return -EINVAL;
}
