iolog: Added option read_iolog_chunked. Used to avoid reading large iologs at once.

[fio.git] / options.c

diff --git a/options.c b/options.c
index 9fbcd96d9ee1f4987fbbfad8e5eac896e6dd8dad..393669ab20aa9f250a482ada4113fc50259de11f 100644 (file)
--- a/options.c
+++ b/options.c
@@ -1555,9 +1555,9 @@ static int rw_verify(const struct fio_option *o, void *data)
 {
        struct thread_data *td = cb_data_to_td(data);
 
-       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);
+       if (read_only && (td_write(td) || td_trim(td))) {
+               log_err("fio: job <%s> has write or trim bit set, but"
+                       " fio is in read-only mode\n", td->o.name);
                return 1;
        }
 
@@ -3134,6 +3134,17 @@ struct fio_option fio_options[FIO_MAX_OPTS] = {
                .category = FIO_OPT_C_IO,
                .group  = FIO_OPT_G_IOLOG,
        },
+       {
+               .name   = "read_iolog_chunked",
+               .lname  = "Read I/O log in parts",
+               .type   = FIO_OPT_BOOL,
+               .off1   = offsetof(struct thread_options, read_iolog_chunked),
+               .def    = "0",
+               .parent = "read_iolog",
+               .help   = "Parse IO pattern in chunks",
+               .category = FIO_OPT_C_IO,
+               .group  = FIO_OPT_G_IOLOG,
+       },
        {
                .name   = "replay_no_stall",
                .lname  = "Don't stall on replay",
@@ -4790,7 +4801,7 @@ static char *bc_calc(char *str)
  * substitution always occurs, even if VARNAME is empty or the corresponding
  * environment variable undefined.
  */
-static char *option_dup_subs(const char *opt)
+char *fio_option_dup_subs(const char *opt)
 {
        char out[OPT_LEN_MAX+1];
        char in[OPT_LEN_MAX+1];
@@ -4895,7 +4906,7 @@ static char **dup_and_sub_options(char **opts, int num_opts)
        int i;
        char **opts_copy = malloc(num_opts * sizeof(*opts));
        for (i = 0; i < num_opts; i++) {
-               opts_copy[i] = option_dup_subs(opts[i]);
+               opts_copy[i] = fio_option_dup_subs(opts[i]);
                if (!opts_copy[i])
                        continue;
                opts_copy[i] = fio_keyword_replace(opts_copy[i]);