+captive_shared_cache_map_set_data_invalid()

[captive.git] / src / libcaptive / cc / sharedcachemap.c

diff --git a/src/libcaptive/cc/sharedcachemap.c b/src/libcaptive/cc/sharedcachemap.c
index 6dec135..0224e3f 100644 (file)
--- a/src/libcaptive/cc/sharedcachemap.c
+++ b/src/libcaptive/cc/sharedcachemap.c
@@ -420,6 +420,7 @@ ULONG got;
                        g_assert(got<=PAGE_SIZE);
                after_eof=(got<PAGE_SIZE);
                captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid=TRUE;
+               captive_shared_cache_map_object->pages[now/PAGE_SIZE].dirty=FALSE;
                }
 }
 
@@ -462,6 +463,24 @@ guint64 now;
 
        for (now=start;now<end;now+=PAGE_SIZE) {
                captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid=TRUE;
+               /* .dirty is undefined */
+               }
+}
+
+void captive_shared_cache_map_set_data_invalid(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
+               guint64 start,guint64 end)
+{
+guint64 now;
+
+       g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
+       g_return_if_fail(start<=end);
+       g_return_if_fail(end<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
+
+       start=CAPTIVE_ROUND_DOWN64(start,PAGE_SIZE);
+       end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
+
+       for (now=start;now<end;now+=PAGE_SIZE) {
+               captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid=FALSE;
                }
 }
 
@@ -532,11 +551,18 @@ CaptiveSharedCacheMapObject_page *page;
 
        g_signal_emit(captive_shared_cache_map_object,purge_signal,0);
 
+       /* Needed by fastfat.sys of NT-5.1sp1 during FAT32 unmount
+        * otherwise it fails on: g_assert(!page->dirty);
+        * It corrupts the disk if the buffer is dropped instead.
+        */
+       captive_shared_cache_map_flush(captive_shared_cache_map_object,
+                       0,CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
+
        for (offset=0;offset<CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE);offset+=PAGE_SIZE) {
                page=captive_shared_cache_map_object->pages+offset/PAGE_SIZE;
                if (!page->data_valid)
                        continue;
-               g_assert(!page->dirty); /* FIXME: Is it allowed by W32? */
+               g_assert(!page->dirty);
                page->data_valid=FALSE;
                }
 }