diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index a85ecd3..c823fe0 100644
--- a/fsdev/file-op-9p.h
+++ b/fsdev/file-op-9p.h
@@ -74,7 +74,7 @@
 } FsContext;
 
 typedef struct V9fsPath {
-    int16_t size;
+    uint16_t size;
     char *data;
 } V9fsPath;
 
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 46dc9f7..7f1301b 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -1694,8 +1694,8 @@
     complete_pdu(s, pdu, err);
 }
 
-static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu,
-                           V9fsFidState *fidp, int64_t off, int32_t max_count)
+static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp,
+                           uint64_t off, uint32_t max_count)
 {
     size_t offset = 7;
     int read_count;
@@ -1719,7 +1719,7 @@
 }
 
 static int v9fs_do_readdir_with_stat(V9fsPDU *pdu,
-                                     V9fsFidState *fidp, int32_t max_count)
+                                     V9fsFidState *fidp, uint32_t max_count)
 {
     V9fsPath path;
     V9fsStat v9stat;
@@ -1814,11 +1814,11 @@
 static void v9fs_read(void *opaque)
 {
     int32_t fid;
-    int64_t off;
+    uint64_t off;
     ssize_t err = 0;
     int32_t count = 0;
     size_t offset = 7;
-    int32_t max_count;
+    uint32_t max_count;
     V9fsFidState *fidp;
     V9fsPDU *pdu = opaque;
     V9fsState *s = pdu->s;
@@ -1962,8 +1962,9 @@
     V9fsFidState *fidp;
     ssize_t retval = 0;
     size_t offset = 7;
-    int64_t initial_offset;
-    int32_t count, max_count;
+    uint64_t initial_offset;
+    int32_t count;
+    uint32_t max_count;
     V9fsPDU *pdu = opaque;
     V9fsState *s = pdu->s;
 
@@ -2001,7 +2002,7 @@
 }
 
 static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp,
-                            int64_t off, int32_t count,
+                            uint64_t off, uint32_t count,
                             struct iovec *sg, int cnt)
 {
     int i, to_copy;
@@ -2048,8 +2049,8 @@
 {
     ssize_t err;
     int32_t fid;
-    int64_t off;
-    int32_t count;
+    uint64_t off;
+    uint32_t count;
     int32_t len = 0;
     int32_t total = 0;
     size_t offset = 7;
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index 8b612da..19a797b 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -156,7 +156,7 @@
 
 typedef struct V9fsString
 {
-    int16_t size;
+    uint16_t size;
     char *data;
 } V9fsString;
 
diff --git a/trace-events b/trace-events
index 514849a..2918398 100644
--- a/trace-events
+++ b/trace-events
@@ -578,11 +578,11 @@
 v9fs_lcreate_return(uint16_t tag, uint8_t id, int8_t type, int32_t version, int64_t path, int32_t iounit) "tag %d id %d qid={type %d version %d path %"PRId64"} iounit %d"
 v9fs_fsync(uint16_t tag, uint8_t id, int32_t fid, int datasync) "tag %d id %d fid %d datasync %d"
 v9fs_clunk(uint16_t tag, uint8_t id, int32_t fid) "tag %d id %d fid %d"
-v9fs_read(uint16_t tag, uint8_t id, int32_t fid, int64_t off, int32_t max_count) "tag %d id %d fid %d off %"PRId64" max_count %d"
+v9fs_read(uint16_t tag, uint8_t id, int32_t fid, uint64_t off, uint32_t max_count) "tag %d id %d fid %d off %"PRIu64" max_count %u"
 v9fs_read_return(uint16_t tag, uint8_t id, int32_t count, ssize_t err) "tag %d id %d count %d err %zd"
-v9fs_readdir(uint16_t tag, uint8_t id, int32_t fid, int64_t offset, int32_t max_count) "tag %d id %d fid %d offset %"PRId64" max_count %d"
-v9fs_readdir_return(uint16_t tag, uint8_t id, int32_t count, ssize_t retval) "tag %d id %d count %d retval %zd"
-v9fs_write(uint16_t tag, uint8_t id, int32_t fid, int64_t off, int32_t count, int cnt) "tag %d id %d fid %d off %"PRId64" count %d cnt %d"
+v9fs_readdir(uint16_t tag, uint8_t id, int32_t fid, uint64_t offset, uint32_t max_count) "tag %d id %d fid %d offset %"PRIu64" max_count %u"
+v9fs_readdir_return(uint16_t tag, uint8_t id, uint32_t count, ssize_t retval) "tag %d id %d count %u retval %zd"
+v9fs_write(uint16_t tag, uint8_t id, int32_t fid, uint64_t off, uint32_t count, int cnt) "tag %d id %d fid %d off %"PRIu64" count %u cnt %d"
 v9fs_write_return(uint16_t tag, uint8_t id, int32_t total, ssize_t err) "tag %d id %d total %d err %zd"
 v9fs_create(uint16_t tag, uint8_t id, int32_t fid, char* name, int32_t perm, int8_t mode) "tag %d id %d fid %d name %s perm %d mode %d"
 v9fs_create_return(uint16_t tag, uint8_t id, int8_t type, int32_t version, int64_t path, int iounit) "tag %d id %d qid={type %d version %d path %"PRId64"} iounit %d"