raw-posix: add Linux native AIO support

[qemu.git] / qemu-io.c

diff --git a/qemu-io.c b/qemu-io.c
index a68f195c1142e9417ac10fc3cb0b292db3b0d70d..f96a4de6b4a2a12701c962504f6542d1f41ea981 100644 (file)
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -1401,6 +1401,7 @@ static void usage(const char *name)
 "  -n, --nocache        disable host cache\n"
 "  -g, --growable       allow file to grow (only applies to protocols)\n"
 "  -m, --misalign       misalign allocations for O_DIRECT\n"
+"  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
 "  -h, --help           display this help and exit\n"
 "  -V, --version        output version information and exit\n"
 "\n",
@@ -1412,7 +1413,7 @@ int main(int argc, char **argv)
 {
        int readonly = 0;
        int growable = 0;
-       const char *sopt = "hVc:Crsnmg";
+       const char *sopt = "hVc:Crsnmgk";
        struct option lopt[] = {
                { "help", 0, NULL, 'h' },
                { "version", 0, NULL, 'V' },
@@ -1424,6 +1425,7 @@ int main(int argc, char **argv)
                { "nocache", 0, NULL, 'n' },
                { "misalign", 0, NULL, 'm' },
                { "growable", 0, NULL, 'g' },
+               { "native-aio", 0, NULL, 'k' },
                { NULL, 0, NULL, 0 }
        };
        int c;
@@ -1455,6 +1457,9 @@ int main(int argc, char **argv)
                case 'g':
                        growable = 1;
                        break;
+               case 'k':
+                       flags |= BDRV_O_NATIVE_AIO;
+                       break;
                case 'V':
                        printf("%s version %s\n", progname, VERSION);
                        exit(0);