[Qemu-devel] [PATCH v3 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.

$./qemu-img create -f qcow2 /tmp/foo 0x10000000000000000
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 EiB!

Signed-off-by: liguang <address@hidden>
---
 qemu-img.c |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/qemu-img.c b/qemu-img.c
index e29e01b..203e3cb 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -347,11 +347,17 @@ static int img_create(int argc, char **argv)
         char *end;
         sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B);
         if (sval < 0 || *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 EiB!");
+                ret = -1;
+                goto out;
+            } else {
+                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;
+            }
         }
         img_size = (uint64_t)sval;
     }
-- 
1.7.2.5