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From: Li Qiang <>
Date: Tue, 1 Nov 2016 12:00:40 +0100
Subject: [PATCH] 9pfs: convert 'len/copied_len' field in V9fsXattr to the type
 of uint64_t

The 'len' in V9fsXattr comes from the 'size' argument in setxattr()
function in guest. The setxattr() function's declaration is this:

int setxattr(const char *path, const char *name,
             const void *value, size_t size, int flags);

and 'size' is treated as u64 in linux kernel client code:

int p9_client_xattrcreate(struct p9_fid *fid, const char *name,
                          u64 attr_size, int flags)

So the 'len' should have an type of 'uint64_t'.
The 'copied_len' in V9fsXattr is used to account for copied bytes, it
should also have an type of 'uint64_t'.

Suggested-by: Greg Kurz <>
Signed-off-by: Li Qiang <>
Reviewed-by: Greg Kurz <>
Signed-off-by: Greg Kurz <>
(cherry picked from commit 8495f9ad26d398f01e208a53f1a5152483a16084)
 hw/9pfs/9p.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/9pfs/9p.h b/hw/9pfs/9p.h
index 5750d67..4e3bc52 100644
--- a/hw/9pfs/9p.h
+++ b/hw/9pfs/9p.h
@@ -162,8 +162,8 @@ typedef struct V9fsConf
 typedef struct V9fsXattr
-    int64_t copied_len;
-    int64_t len;
+    uint64_t copied_len;
+    uint64_t len;
     void *value;
     V9fsString name;
     int flags;