Commit 592fa070 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

qemu-io: Add command line switch for cache mode 



To be used as in 'qemu-io -t writeback test.img'

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 4e35b92a

qemu-io.c

+9 −1
Original line number Diff line number Diff line
@@ -1784,6 +1784,7 @@ static void usage(const char *name) 
"  -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"

"  -t, --cache=MODE     use the given cache mode for the image\n"

"  -T, --trace FILE     enable trace events listed in the given file\n"

"  -h, --help           display this help and exit\n"

"  -V, --version        output version information and exit\n"
@@ -1796,7 +1797,7 @@ int main(int argc, char **argv) 
{

    int readonly = 0;

    int growable = 0;

    const char *sopt = "hVc:rsnmgkT:";

    const char *sopt = "hVc:rsnmgkt:T:";

    const struct option lopt[] = {

        { "help", 0, NULL, 'h' },

        { "version", 0, NULL, 'V' },
@@ -1808,6 +1809,7 @@ int main(int argc, char **argv) 
        { "misalign", 0, NULL, 'm' },

        { "growable", 0, NULL, 'g' },

        { "native-aio", 0, NULL, 'k' },

        { "cache", 1, NULL, 't' },

        { "trace", 1, NULL, 'T' },

        { NULL, 0, NULL, 0 }

    };
@@ -1840,6 +1842,12 @@ int main(int argc, char **argv) 
        case 'k':

            flags |= BDRV_O_NATIVE_AIO;

            break;

        case 't':

            if (bdrv_parse_cache_flags(optarg, &flags) < 0) {

                error_report("Invalid cache option: %s", optarg);

                exit(1);

            }

            break;

        case 'T':

            if (!trace_backend_init(optarg, NULL)) {

                exit(1); /* error message will have been printed */