From 3def6f5e2478bcde7bcb227ab8e7d88dd3852654 Mon Sep 17 00:00:00 2001
From: Olga Kornievskaia <aglo@citi.umich.edu>
Date: Mon, 6 Feb 2012 14:23:47 -0500
Subject: [PATCH] propagating file change attr on getattr

---
 daemon/getattr.c   |  3 +++
 daemon/upcall.h    |  1 +
 sys/nfs41_driver.c | 19 +++++++++++++++----
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/daemon/getattr.c b/daemon/getattr.c
index e56e21f..e9dd924 100644
--- a/daemon/getattr.c
+++ b/daemon/getattr.c
@@ -104,6 +104,7 @@ static int handle_getattr(nfs41_upcall *upcall)
     switch (args->query_class) {
     case FileBasicInformation:
         nfs_to_basic_info(&info, &args->basic_info);
+        args->ctime = info.change;
         break;
     case FileStandardInformation:
         nfs_to_standard_info(&info, &args->std_info);
@@ -165,6 +166,8 @@ static int marshall_getattr(unsigned char *buffer, uint32_t *length, nfs41_upcal
         status = 103;
         goto out;
     }
+    status = safe_write(&buffer, length, &args->ctime, sizeof(args->ctime));
+    if (status) goto out;
 out:
     return status;
 }
diff --git a/daemon/upcall.h b/daemon/upcall.h
index 4595b15..5efc7fb 100644
--- a/daemon/upcall.h
+++ b/daemon/upcall.h
@@ -96,6 +96,7 @@ typedef struct __getattr_upcall_args {
     int query_class;
     int buf_len;
     int query_reply_len;
+    ULONGLONG ctime;
 } getattr_upcall_args;
 
 typedef struct __setattr_upcall_args {
diff --git a/sys/nfs41_driver.c b/sys/nfs41_driver.c
index e868570..97a6f1a 100644
--- a/sys/nfs41_driver.c
+++ b/sys/nfs41_driver.c
@@ -194,6 +194,7 @@ typedef struct _updowncall_entry {
             BOOLEAN initial_query;
             PMDL mdl;
             PVOID mdl_buf;
+            ULONGLONG ChangeTime;
         } QueryFile;
         struct {
             PUNICODE_STRING filename;
@@ -1636,13 +1637,24 @@ void unmarshal_nfs41_attrget(
 {
     ULONG buf_len;
     RtlCopyMemory(&buf_len, *buf, sizeof(ULONG));
-    *buf += sizeof(ULONG);
-    *attr_len = buf_len;
     if (buf_len > *attr_len) {
         cur->status = STATUS_BUFFER_TOO_SMALL;        
         return;
     }
+    *buf += sizeof(ULONG);
+    *attr_len = buf_len;
     RtlCopyMemory(attr_value, *buf, buf_len);
+    *buf += buf_len;
+}
+
+void unmarshal_nfs41_getattr(
+    nfs41_updowncall_entry *cur,
+    unsigned char **buf)
+{
+    unmarshal_nfs41_attrget(cur, cur->u.QueryFile.buf, 
+        &cur->u.QueryFile.buf_len, buf);
+    RtlCopyMemory(&cur->u.QueryFile.ChangeTime, *buf, sizeof(LONGLONG));
+    DbgP("[getattr] ChangeTime %llu\n", cur->u.QueryFile.ChangeTime);
 }
 
 NTSTATUS unmarshal_nfs41_getacl(
@@ -1772,8 +1784,7 @@ NTSTATUS nfs41_downcall(
             status = unmarshal_nfs41_dirquery(cur, &buf);
             break;
         case NFS41_FILE_QUERY:
-            unmarshal_nfs41_attrget(cur, cur->u.QueryFile.buf, 
-                &cur->u.QueryFile.buf_len, &buf);
+            unmarshal_nfs41_getattr(cur, &buf);
             break;
         case NFS41_EA_GET:
             unmarshal_nfs41_attrget(cur, cur->u.QueryEa.buf,