f2fs_io: add fallocate

This simply supports keep_size.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
index 7fd4425..f087da4 100644 (file)
--- a/tools/f2fs_io/f2fs_io.c
+++ b/tools/f2fs_io/f2fs_io.c
@@ -141,6 +141,50 @@ static void do_pinfile(int argc, char **argv, const struct cmd_desc *cmd)
        exit(0);
 }
 
+#define fallocate_desc "fallocate"
+#define fallocate_help                                         \
+"f2fs_io fallocate [keep_size] [offset] [length] [file]\n\n"   \
+"fallocate given the file\n"                                   \
+" [keep_size] : 1 or 0\n"                                      \
+
+static void do_fallocate(int argc, char **argv, const struct cmd_desc *cmd)
+{
+       int fd;
+       off_t offset, length;
+       struct stat sb;
+       int mode = 0;
+
+       if (argc != 5) {
+               fputs("Excess arguments\n\n", stderr);
+               fputs(cmd->cmd_help, stderr);
+               exit(1);
+       }
+
+       if (!strcmp(argv[1], "1"))
+               mode |= FALLOC_FL_KEEP_SIZE;
+
+       offset = atoi(argv[2]);
+       length = atoi(argv[3]);
+
+       fd = open(argv[4], O_RDWR);
+       if (fd == -1) {
+               fputs("Open failed\n\n", stderr);
+               fputs(cmd->cmd_help, stderr);
+               exit(1);
+       }
+
+       if (fallocate(fd, mode, offset, length)) {
+               fputs("fallocate failed\n\n", stderr);
+               exit(1);
+       }
+       if (fstat(fd, &sb) == -1) {
+               fputs("Stat failed\n\n", stderr);
+               exit(1);
+       }
+       printf("fallocated a file: i_size=%"PRIu64", i_blocks=%"PRIu64"\n", sb.st_size, sb.st_blocks);
+       exit(0);
+}
+
 #define write_desc "write data into file"
 #define write_help                                     \
 "f2fs_io write [chunk_size in 4kb] [offset in chunk_size] [count] [pattern] [IO] [file_path]\n\n"      \
@@ -407,6 +451,7 @@ const struct cmd_desc cmd_list[] = {
        _CMD(help),
        CMD(shutdown),
        CMD(pinfile),
+       CMD(fallocate),
        CMD(write),
        CMD(read),
        CMD(fiemap),