[Qemu-devel] [PATCH 2/2] qemu-img:report size overflow error message

[liguang]

qemu-img will complain when qcow or qcow2
size overflow for 64 bits, report the right
message in this condition.

before change:
qemu-img: Invalid image size specified! You may use k, M, G or T suffixes for
qemu-img: kilobytes, megabytes, gigabytes and terabytes.

after change:
qemu-img: Image size must be less than 8 exabytes!

Signed-off-by: liguang <address@hidden>
---
 qemu-img.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/qemu-img.c b/qemu-img.c
index e29e01b..1c3af67 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -346,13 +346,18 @@ static int img_create(int argc, char **argv)
         int64_t sval;
         char *end;
         sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B);
-        if (sval < 0 || *end) {
+        if (sval == EINVAL || *end) {
             error_report("Invalid image size specified! You may use k, M, G or 
"
                   "T suffixes for ");
             error_report("kilobytes, megabytes, gigabytes and terabytes.");
             ret = -1;
             goto out;
         }
+        if (sval == ERANGE) {
+            error_report("Image size must be less than 8 exabytes!");
+            ret = -1;
+            goto out;
+        }
         img_size = (uint64_t)sval;
     }
 
-- 
1.7.2.5