[Qemu-devel] [PATCH] dump: Show custom message for ENOSPC

[Yasmin Beatriz <yasmins@linux.vnet.ibm.com>]

This patch intends to make a more specific message for when
the system has not enough space to save guest memory.

Reported-by: yilzhang@redhat.com
Cc: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: Yasmin Beatriz <yasmins@linux.vnet.ibm.com>
---
 dump.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/dump.c b/dump.c
index e9dfed060a..eb56ff53f6 100644
--- a/dump.c
+++ b/dump.c
@@ -106,6 +106,9 @@ static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
 
     written_size = qemu_write_full(s->fd, buf, size);
     if (written_size != size) {
+        if (errno == ENOSPC) {
+            return -ENOSPC;
+        }
         return -1;
     }
 
@@ -364,7 +367,11 @@ static void write_data(DumpState *s, void *buf, int length, Error **errp)
 
     ret = fd_write_vmcore(buf, length, s);
     if (ret < 0) {
-        error_setg(errp, "dump: failed to save memory");
+        if (ret == -ENOSPC) {
+            error_setg(errp, "dump: not enough space to save memory");
+        } else {
+            error_setg(errp, "dump: failed to save memory");
+        }
     } else {
         s->written_size += length;
     }
-- 
2.14.1