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-rw-r--r--hw/9pfs/9p.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/hw/9pfs/9p.h b/hw/9pfs/9p.h
index c886ba7..d1cfeaf 100644
--- a/hw/9pfs/9p.h
+++ b/hw/9pfs/9p.h
@@ -124,6 +124,11 @@ typedef struct {
uint8_t id;
uint16_t tag_le;
} QEMU_PACKED P9MsgHeader;
+/* According to the specification, 9p messages start with a 7-byte header.
+ * Since most of the code uses this header size in literal form, we must be
+ * sure this is indeed the case.
+ */
+QEMU_BUILD_BUG_ON(sizeof(P9MsgHeader) != 7);
struct V9fsPDU
{
@@ -358,7 +363,7 @@ struct V9fsTransport {
void (*init_in_iov_from_pdu)(V9fsPDU *pdu, struct iovec **piov,
unsigned int *pniov, size_t size);
void (*init_out_iov_from_pdu)(V9fsPDU *pdu, struct iovec **piov,
- unsigned int *pniov);
+ unsigned int *pniov, size_t size);
void (*push_and_notify)(V9fsPDU *pdu);
};