[PATCH 49/50] mkfs: add headers to realtime bitmap blocks

Darrick J. Wong
2024-12-07T00:17:44Z

From: Darrick J. Wong <djwong@kernel.org>

When the rtgroups feature is enabled, format rtbitmap blocks with the
appropriate block headers. libxfs takes care of the actual writing for
us, so all we have to do is ensure that the bitmap is the correct size.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
---
mkfs/xfs_mkfs.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index 2549a636568d1b..5b9fd0e92f7aba 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -3210,6 +3210,7 @@ validate_rtdev(
struct cli_params *cli)
{
struct libxfs_init *xi = cli->xi;
+ unsigned int rbmblocksize = cfg->blocksize;

if (!xi->rt.dev) {
if (cli->rtsize) {
@@ -3253,8 +3254,10 @@ reported by the device (%u).\n"),
_("cannot have an rt subvolume with zero extents\n"));
usage();
}
+ if (cfg->sb_feat.metadir)
+ rbmblocksize -= sizeof(struct xfs_rtbuf_blkinfo);
cfg->rtbmblocks = (xfs_extlen_t)howmany(cfg->rtextents,
- NBBY * cfg->blocksize);
+ NBBY * rbmblocksize);
}

static bool