@@ -36,6 +36,7 @@
#include <sys/mman.h>
#include <ctype.h>
#include <errno.h>
+#include <fcntl.h>
#include <numa.h>
#include <numaif.h>
#include <stdarg.h>
@@ -726,6 +727,47 @@ static int file_seg(char *args)
return CMD_SUCCESS;
}
+/*
+ * createfile <file-name> <size>[k|m|g|p]]
+ */
+static int create_file(char *args)
+{
+ glctx_t *gcp = &glctx;
+ char *filename, *nextarg;
+ size_t len;
+ int fd;
+
+ args += strspn(args, whitespace);
+ if (!required_arg(args, "<file-name>"))
+ return CMD_ERROR;
+ filename = strtok_r(args, whitespace, &nextarg);
+ args = nextarg + strspn(nextarg, whitespace);
+
+ if (!required_arg(args, "<size>"))
+ return CMD_ERROR;
+ args = strtok_r(args, whitespace, &nextarg);
+ len = get_scaled_value(args, "size");
+ if (len == BOGUS_SIZE)
+ return CMD_ERROR;
+ args = get_next_arg(args, nextarg);
+
+ fd = open(filename, O_RDWR | O_CREAT, 0600);
+ if (fd < 0) {
+ fprintf(stderr, "%s: createfile failed - %s\n",
+ gcp->program_name, strerror(errno));
+ return CMD_ERROR;
+ }
+
+ if (posix_fallocate(fd, 0, len)) {
+ fprintf(stderr, "%s: createfile failed - %s\n",
+ gcp->program_name, strerror(errno));
+ return CMD_ERROR;
+ }
+ close(fd);
+ return CMD_SUCCESS;
+}
+
+
/*
* remove_seg: <seg-name> [<seg-name> ...]
*/
@@ -1030,6 +1072,8 @@ struct command {
"\tspecified offset into the file. <offset> and <length> may be\n"
"\tomitted and specified on the map command.\n"
"\t<seg-share> := private|shared - default = private\n"}, {
+ .cmd_name = "createfile", .cmd_func = create_file, .cmd_help =
+ "createfile <file-name> <size>[k|m|g|p]]",}, {
.cmd_name = "shm",.cmd_func = shmem_seg,.cmd_help =
"shm <seg-name> <seg-size>[k|m|g|p] - \n"
"\tdefine a shared memory segment of specified size.\n"
Add a new memtoy command for interactively creating an empty file of specified size. USAGE: createfile <filename> <size>[k|m|p|g] Example: createfile /data/local/tmp 100m This will create a file named temp in /data/local/tmp/ with the size of 100 megabytes. Change from v1: 1. Replace printf with fprintf in stderr for error message Signed-off-by: Yuan Gao <aiden.gaoyuan@gmail.com> --- .../kernel/hotplug/memory_hotplug/commands.c | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+)