Add --readonly option

[fio.git] / init.c

diff --git a/init.c b/init.c
index f3cb9ad6c18d44581d13d67e8d850ab791d2442b..2a1ee149cc85dc15601a7ad86ec8a01021987d3c 100644 (file)
--- a/init.c
+++ b/init.c
@@ -24,6 +24,7 @@ static char fio_version_string[] = "fio 1.17.1";
 static char **ini_file;
 static int max_jobs = MAX_JOBS;
 static int dump_cmdline;
+static int read_only;
 
 struct thread_data def_thread;
 struct thread_data *threads = NULL;
@@ -89,7 +90,12 @@ static struct option long_options[FIO_NR_OPTIONS] = {
        {
                .name           = "showcmd",
                .has_arg        = no_argument,
-               .val            = 's'
+               .val            = 's',
+       },
+       {
+               .name           = "readonly",
+               .has_arg        = no_argument,
+               .val            = 'r',
        },
        {
                .name           = NULL,
@@ -180,6 +186,11 @@ static int fixup_options(struct thread_data *td)
 {
        struct thread_options *o = &td->o;
 
+       if (read_only && td_write(td)) {
+               log_err("fio: job <%s> has write bit set, but fio is in read-only mode\n", td->o.name);
+               return 1;
+       }
+       
        if (o->rwmix[DDIR_READ] + o->rwmix[DDIR_WRITE] > 100)
                o->rwmix[DDIR_WRITE] = 100 - o->rwmix[DDIR_READ];
 
@@ -768,6 +779,9 @@ static int parse_cmd_line(int argc, char *argv[])
                case 's':
                        dump_cmdline = 1;
                        break;
+               case 'r':
+                       read_only = 1;
+                       break;
                case 'v':
                        printf("%s\n", fio_version_string);
                        exit(0);