linux-kernel - [PATCH v2] f2fs_io: expend fallocate command

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Date:   Wed,  7 Jun 2023 22:56:36 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     jaegeuk@...nel.org
Cc:     chao@...nel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Yangtao Li <frank.li@...o.com>
Subject: [PATCH v2] f2fs_io: expend fallocate command

Expend fallocate command to support more flags.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 tools/f2fs_io/f2fs_io.c | 39 +++++++++++++++++++++++++++++++++------
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 1774eca..5a6a6a0 100644
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -413,9 +413,13 @@ static void do_pinfile(int argc, char **argv, const struct cmd_desc *cmd)
 
 #define fallocate_desc "fallocate"
 #define fallocate_help						\
-"f2fs_io fallocate [keep_size] [offset] [length] [file]\n\n"	\
+"f2fs_io fallocate [-cipz] [keep_size] [offset] [length] [file]\n\n"	\
 "fallocate given the file\n"					\
 " [keep_size] : 1 or 0\n"					\
+" -p : punch hole\n"						\
+" -c : collapse range\n"					\
+" -z : zero range\n"						\
+" -i : insert range\n"						\
 
 static void do_fallocate(int argc, char **argv, const struct cmd_desc *cmd)
 {
@@ -423,20 +427,43 @@ static void do_fallocate(int argc, char **argv, const struct cmd_desc *cmd)
 	off_t offset, length;
 	struct stat sb;
 	int mode = 0;
+	int c;
 
-	if (argc != 5) {
+	while ((c = getopt(argc, argv, "cipz")) != -1) {
+		switch (c) {
+		case 'c':
+			mode |= FALLOC_FL_COLLAPSE_RANGE;
+			break;
+		case 'i':
+			mode |= FALLOC_FL_INSERT_RANGE;
+			break;
+		case 'p':
+			mode |= FALLOC_FL_PUNCH_HOLE;
+			break;
+		case 'z':
+			mode |= FALLOC_FL_ZERO_RANGE;
+			break;
+		default:
+			fputs(cmd->cmd_help, stderr);
+			exit(2);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 4) {
 		fputs("Excess arguments\n\n", stderr);
 		fputs(cmd->cmd_help, stderr);
 		exit(1);
 	}
 
-	if (!strcmp(argv[1], "1"))
+	if (!strcmp(argv[0], "1"))
 		mode |= FALLOC_FL_KEEP_SIZE;
 
-	offset = atoi(argv[2]);
-	length = atoll(argv[3]);
+	offset = atoi(argv[1]);
+	length = atoll(argv[2]);
 
-	fd = xopen(argv[4], O_RDWR, 0);
+	fd = xopen(argv[3], O_RDWR, 0);
 
 	if (fallocate(fd, mode, offset, length) != 0)
 		die_errno("fallocate failed");
-- 
2.39.0