[PATCH 3/3] mkfs: enable reflink with realtime extent sizes > 1

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Allow creation of filesystems with reflink enabled and realtime extent
size larger than 1 block.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 libxfs/init.c   |    7 -------
 mkfs/xfs_mkfs.c |   37 -------------------------------------
 2 files changed, 44 deletions(-)


diff --git a/libxfs/init.c b/libxfs/init.c
index a4023f78655..c04a30bb829 100644
--- a/libxfs/init.c
+++ b/libxfs/init.c
@@ -448,13 +448,6 @@ rtmount_init(
 	if (mp->m_sb.sb_rblocks == 0)
 		return 0;
 
-	if (xfs_has_reflink(mp) && mp->m_sb.sb_rextsize > 1) {
-		fprintf(stderr,
-	_("%s: Reflink not compatible with realtime extent size > 1. Please try a newer xfsprogs.\n"),
-				progname);
-		return -1;
-	}
-
 	if (mp->m_rtdev_targp->bt_bdev == 0 && !xfs_is_debugger(mp)) {
 		fprintf(stderr, _("%s: filesystem has a realtime subvolume\n"),
 			progname);
diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index e406fa6a5ea..db828deadfb 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -2385,24 +2385,6 @@ _("inode btree counters not supported without finobt support\n"));
 	}
 
 	if (cli->xi->rtname) {
-		if (cli->rtextsize && cli->sb_feat.reflink) {
-			if (cli_opt_set(&mopts, M_REFLINK)) {
-				fprintf(stderr,
-_("reflink not supported on realtime devices with rt extent size specified\n"));
-				usage();
-			}
-			cli->sb_feat.reflink = false;
-		}
-		if (cli->blocksize < XFS_MIN_RTEXTSIZE && cli->sb_feat.reflink) {
-			if (cli_opt_set(&mopts, M_REFLINK)) {
-				fprintf(stderr,
-_("reflink not supported on realtime devices with blocksize %d < %d\n"),
-						cli->blocksize,
-						XFS_MIN_RTEXTSIZE);
-				usage();
-			}
-			cli->sb_feat.reflink = false;
-		}
 		if (!cli->sb_feat.rtgroups && cli->sb_feat.reflink) {
 			if (cli_opt_set(&mopts, M_REFLINK) &&
 			    cli_opt_set(&ropts, R_RTGROUPS)) {
@@ -2582,19 +2564,6 @@ validate_rtextsize(
 			usage();
 		}
 		cfg->rtextblocks = (xfs_extlen_t)(rtextbytes >> cfg->blocklog);
-	} else if (cli->sb_feat.reflink && cli->xi->rtname) {
-		/*
-		 * reflink doesn't support rt extent size > 1FSB yet, so set
-		 * an extent size of 1FSB.  Make sure we still satisfy the
-		 * minimum rt extent size.
-		 */
-		if (cfg->blocksize < XFS_MIN_RTEXTSIZE) {
-			fprintf(stderr,
-		_("reflink not supported on rt volume with blocksize %d\n"),
-				cfg->blocksize);
-			usage();
-		}
-		cfg->rtextblocks = 1;
 	} else {
 		/*
 		 * If realtime extsize has not been specified by the user,
@@ -2626,12 +2595,6 @@ validate_rtextsize(
 		}
 	}
 	ASSERT(cfg->rtextblocks);
-
-	if (cli->sb_feat.reflink && cfg->rtblocks > 0 && cfg->rtextblocks > 1) {
-		fprintf(stderr,
-_("reflink not supported on realtime with extent sizes > 1\n"));
-		usage();
-	}
 }
 
 /* Validate the incoming extsize hint. */