cmdprio: move cmdprio function definitions to a new cmdprio.c file

[fio.git] / engines / cmdprio.c

diff --git a/engines/cmdprio.c b/engines/cmdprio.c
new file mode 100644 (file)
index 0000000..f5b7342
--- /dev/null
+++ b/engines/cmdprio.c
@@ -0,0 +1,130 @@
+/*
+ * IO priority handling helper functions common to the libaio and io_uring
+ * engines.
+ */
+
+#include "cmdprio.h"
+
+static int fio_cmdprio_bssplit_ddir(struct thread_options *to, void *cb_arg,
+                                   enum fio_ddir ddir, char *str, bool data)
+{
+       struct cmdprio *cmdprio = cb_arg;
+       struct split split;
+       unsigned int i;
+
+       if (ddir == DDIR_TRIM)
+               return 0;
+
+       memset(&split, 0, sizeof(split));
+
+       if (split_parse_ddir(to, &split, str, data, BSSPLIT_MAX))
+               return 1;
+       if (!split.nr)
+               return 0;
+
+       cmdprio->bssplit_nr[ddir] = split.nr;
+       cmdprio->bssplit[ddir] = malloc(split.nr * sizeof(struct bssplit));
+       if (!cmdprio->bssplit[ddir])
+               return 1;
+
+       for (i = 0; i < split.nr; i++) {
+               cmdprio->bssplit[ddir][i].bs = split.val1[i];
+               if (split.val2[i] == -1U) {
+                       cmdprio->bssplit[ddir][i].perc = 0;
+               } else {
+                       if (split.val2[i] > 100)
+                               cmdprio->bssplit[ddir][i].perc = 100;
+                       else
+                               cmdprio->bssplit[ddir][i].perc = split.val2[i];
+               }
+       }
+
+       return 0;
+}
+
+int fio_cmdprio_bssplit_parse(struct thread_data *td, const char *input,
+                             struct cmdprio *cmdprio)
+{
+       char *str, *p;
+       int i, ret = 0;
+
+       p = str = strdup(input);
+
+       strip_blank_front(&str);
+       strip_blank_end(str);
+
+       ret = str_split_parse(td, str, fio_cmdprio_bssplit_ddir, cmdprio, false);
+
+       if (parse_dryrun()) {
+               for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+                       free(cmdprio->bssplit[i]);
+                       cmdprio->bssplit[i] = NULL;
+                       cmdprio->bssplit_nr[i] = 0;
+               }
+       }
+
+       free(p);
+       return ret;
+}
+
+int fio_cmdprio_percentage(struct cmdprio *cmdprio, struct io_u *io_u)
+{
+       enum fio_ddir ddir = io_u->ddir;
+       unsigned int p = cmdprio->percentage[ddir];
+       int i;
+
+       /*
+        * If cmdprio_percentage option was specified, then use that
+        * percentage. Otherwise, use cmdprio_bssplit percentages depending
+        * on the IO size.
+        */
+       if (p)
+               return p;
+
+       for (i = 0; i < cmdprio->bssplit_nr[ddir]; i++) {
+               if (cmdprio->bssplit[ddir][i].bs == io_u->buflen)
+                       return cmdprio->bssplit[ddir][i].perc;
+       }
+
+       return 0;
+}
+
+int fio_cmdprio_init(struct thread_data *td, struct cmdprio *cmdprio,
+                    bool *has_cmdprio)
+{
+       struct thread_options *to = &td->o;
+       bool has_cmdprio_percentage = false;
+       bool has_cmdprio_bssplit = false;
+       int i;
+
+       /*
+        * If cmdprio_percentage/cmdprio_bssplit is set and cmdprio_class
+        * is not set, default to RT priority class.
+        */
+       for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+               if (cmdprio->percentage[i]) {
+                       if (!cmdprio->class[i])
+                               cmdprio->class[i] = IOPRIO_CLASS_RT;
+                       has_cmdprio_percentage = true;
+               }
+               if (cmdprio->bssplit_nr[i]) {
+                       if (!cmdprio->class[i])
+                               cmdprio->class[i] = IOPRIO_CLASS_RT;
+                       has_cmdprio_bssplit = true;
+               }
+       }
+
+       /*
+        * Check for option conflicts
+        */
+       if (has_cmdprio_percentage && has_cmdprio_bssplit) {
+               log_err("%s: cmdprio_percentage and cmdprio_bssplit options "
+                       "are mutually exclusive\n",
+                       to->name);
+               return 1;
+       }
+
+       *has_cmdprio = has_cmdprio_percentage || has_cmdprio_bssplit;
+
+       return 0;
+}