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authorKevin Wolf <kwolf@redhat.com>2012-04-18 12:07:39 +0200
committerKevin Wolf <kwolf@redhat.com>2012-04-19 16:03:16 +0200
commit592fa07043095ba3141fb9d413693d3c202cba9a (patch)
tree1a3aca1eb3978f30ed6a6dc21416e99eccb59a09 /qemu-io.c
parent4e35b92a51571002a68d3be74b774546d9aefd19 (diff)
qemu-io: Add command line switch for cache mode
To be used as in 'qemu-io -t writeback test.img' Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'qemu-io.c')
-rw-r--r--qemu-io.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/qemu-io.c b/qemu-io.c
index e6fcd7719e..3095a22be3 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -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 */