[PATCH 2/2] mkfs: Show progress during block discard

[Pavel Reichl <preichl@redhat.com>]

Signed-off-by: Pavel Reichl <preichl@redhat.com>
---
 mkfs/xfs_mkfs.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index a02d6f66..07b8bd78 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -1248,6 +1248,7 @@ discard_blocks(dev_t dev, uint64_t nsectors)
 	const uint64_t	step		= (uint64_t)2<<30;
 	/* Sector size is 512 bytes */
 	const uint64_t	count		= nsectors << 9;
+	uint64_t	prev_done	= (uint64_t) ~0;
 
 	fd = libxfs_device_to_fd(dev);
 	if (fd <= 0)
@@ -1255,6 +1256,7 @@ discard_blocks(dev_t dev, uint64_t nsectors)
 
 	while (offset < count) {
 		uint64_t	tmp_step = step;
+		uint64_t	done = offset * 100 / count;
 
 		if ((offset + step) > count)
 			tmp_step = count - offset;
@@ -1268,7 +1270,13 @@ discard_blocks(dev_t dev, uint64_t nsectors)
 			return;
 
 		offset += tmp_step;
+
+		if (prev_done != done) {
+			prev_done = done;
+			fprintf(stderr, _("Discarding: %2lu%% done\n"), done);
+		}
 	}
+	fprintf(stderr, _("Discarding is done.\n"));
 }
 
 static __attribute__((noreturn)) void
-- 
2.23.0