[PATCH] xfs_grow: Remove xflag and iflag to reduce redundant temporary variables.

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Both xflag and iflag are log flags. We can use the bits of lflag to
indicate all log flags, which is a small code reconstruction.

Signed-off-by: Wu YiFeng <wuyifeng10@xxxxxxxxxx>
---
 growfs/xfs_growfs.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/growfs/xfs_growfs.c b/growfs/xfs_growfs.c
index 683961f6..5fb1a9d2 100644
--- a/growfs/xfs_growfs.c
+++ b/growfs/xfs_growfs.c
@@ -8,6 +8,10 @@
 #include "libfrog/paths.h"
 #include "libfrog/fsgeom.h"

+#define LOG_GROW	(1<<0)	/* -l flag: grow log section */
+#define LOG_EXT2INT	(1<<1)	/* -i flag: convert log from external to internal format */
+#define LOG_INT2EXT	(1<<2)	/* -x flag: convert log from internal to external format */
+
 static void
 usage(void)
 {
@@ -45,7 +49,6 @@ main(int argc, char **argv)
 	long			esize;	/* new rt extent size */
 	int			ffd;	/* mount point file descriptor */
 	struct xfs_fsop_geom	geo;	/* current fs geometry */
-	int			iflag;	/* -i flag */
 	int			isint;	/* log is currently internal */
 	int			lflag;	/* -l flag */
 	long long		lsize;	/* new log size in fs blocks */
@@ -55,7 +58,6 @@ main(int argc, char **argv)
 	struct xfs_fsop_geom	ngeo;	/* new fs geometry */
 	int			rflag;	/* -r flag */
 	long long		rsize;	/* new rt size in fs blocks */
-	int			xflag;	/* -x flag */
 	char			*fname;	/* mount point name */
 	char			*datadev; /* data device name */
 	char			*logdev;  /*  log device name */
@@ -72,7 +74,7 @@ main(int argc, char **argv)

 	maxpct = esize = 0;
 	dsize = lsize = rsize = 0LL;
-	aflag = dflag = iflag = lflag = mflag = nflag = rflag = xflag = 0;
+	aflag = dflag = lflag = mflag = nflag = rflag = 0;

 	while ((c = getopt(argc, argv, "dD:e:ilL:m:np:rR:t:xV")) != EOF) {
 		switch (c) {
@@ -87,13 +89,13 @@ main(int argc, char **argv)
 			rflag = 1;
 			break;
 		case 'i':
-			lflag = iflag = 1;
+			lflag |= LOG_EXT2INT;
 			break;
 		case 'L':
 			lsize = strtoll(optarg, NULL, 10);
 			fallthrough;
 		case 'l':
-			lflag = 1;
+			lflag |= LOG_GROW;
 			break;
 		case 'm':
 			mflag = 1;
@@ -115,7 +117,7 @@ main(int argc, char **argv)
 			mtab_file = optarg;
 			break;
 		case 'x':
-			lflag = xflag = 1;
+			lflag |= LOG_INT2EXT;
 			break;
 		case 'V':
 			printf(_("%s version %s\n"), progname, VERSION);
@@ -124,9 +126,7 @@ main(int argc, char **argv)
 			usage();
 		}
 	}
-	if (argc - optind != 1)
-		usage();
-	if (iflag && xflag)
+	if (argc - optind != 1 || ((lflag & LOG_EXT2INT) && (lflag & LOG_INT2EXT)))
 		usage();
 	if (dflag + lflag + rflag + mflag == 0)
 		aflag = 1;
@@ -323,9 +323,9 @@ _("[EXPERIMENTAL] try to shrink unused space %lld, old size is %lld\n"),

 		if (!lsize)
 			lsize = dlsize / (geo.blocksize / BBSIZE);
-		if (iflag)
+		if (lflag & LOG_EXT2INT)
 			in.isint = 1;
-		else if (xflag)
+		else if (lflag & LOG_INT2EXT)
 			in.isint = 0;
 		else
 			in.isint = xi.logBBsize == 0;
-- 
2.33.0





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