[PATCH 5/5] mkfs: use a sensible log sector size default

[Christoph Hellwig <hch@lst.de>]

Currently the XFS log sector size defaults to the 512 bytes unless
explicitly overriden.  Default to the device logical block size queried
by get_topology instead.  If that is also 512 nothing changes, and if
the device logical block size is larger this prevents a mkfs failure
because the libxfs buffer cache blows up and as we obviously can't
use a smaller than hardware supported sector size.  This fixes xfs/157
with a 4k block size device.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Tested-by: Pankaj Raghav <p.raghav@samsung.com>
---
 mkfs/xfs_mkfs.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index be65ccc1e..022a11a7f 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -2075,7 +2075,8 @@ static void
 validate_log_sectorsize(
 	struct mkfs_params	*cfg,
 	struct cli_params	*cli,
-	struct mkfs_default_params *dft)
+	struct mkfs_default_params *dft,
+	struct fs_topology	*ft)
 {
 
 	if (cli->loginternal && cli->lsectorsize &&
@@ -2090,7 +2091,7 @@ _("Can't change sector size on internal log!\n"));
 	else if (cli->loginternal)
 		cfg->lsectorsize = cfg->sectorsize;
 	else
-		cfg->lsectorsize = dft->sectorsize;
+		cfg->lsectorsize = ft->log.logical_sector_size;
 	cfg->lsectorlog = libxfs_highbit32(cfg->lsectorsize);
 
 	if (cfg->lsectorsize < XFS_MIN_SECTORSIZE ||
@@ -4196,7 +4197,7 @@ main(
 	blocksize = cfg.blocksize;
 	sectorsize = cfg.sectorsize;
 
-	validate_log_sectorsize(&cfg, &cli, &dft);
+	validate_log_sectorsize(&cfg, &cli, &dft, &ft);
 	validate_sb_features(&cfg, &cli);
 
 	/*
-- 
2.39.2