engines: Add Network Block Device (NBD) support using libnbd.

[fio.git] / options.c

diff --git a/options.c b/options.c
index 626c7c1715976c7e77c8e18327caf5d0a3639abb..f4c9bedf377fe0805c787f1bf349e5b91ce0b7e2 100644 (file)
--- a/options.c
+++ b/options.c
@@ -493,6 +493,9 @@ int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu_index)
        const long max_cpu = cpus_online();
 
        cpus_in_mask = fio_cpu_count(mask);
+       if (!cpus_in_mask)
+               return 0;
+
        cpu_index = cpu_index % cpus_in_mask;
 
        index = 0;
@@ -1773,13 +1776,11 @@ struct fio_option fio_options[FIO_MAX_OPTS] = {
                            .help = "Linux native asynchronous IO",
                          },
 #endif
-#ifdef CONFIG_LIBAIO
-#ifdef ARCH_HAVE_AIORING
-                         { .ival = "aio-ring",
-                           .help = "Linux native asynchronous IO",
+#ifdef ARCH_HAVE_IOURING
+                         { .ival = "io_uring",
+                           .help = "Fast Linux native aio",
                          },
 #endif
-#endif
 #ifdef CONFIG_POSIXAIO
                          { .ival = "posixaio",
                            .help = "POSIX asynchronous IO",
@@ -1898,6 +1899,9 @@ struct fio_option fio_options[FIO_MAX_OPTS] = {
                            .help = "HTTP (WebDAV/S3) IO engine",
                          },
 #endif
+                         { .ival = "nbd",
+                           .help = "Network Block Device (NBD) IO engine"
+                         },
                },
        },
        {