文件控制块主要用来表示一个ReactOS打开文件的对象。下面就来仔细地分析文件控制块的结构，如下：@H_403_3@

#001 typedef struct _VFATFCB@H_403_3@

#002 {@H_403_3@

@H_403_3@

ROS的文件头部，主要包括文件流的描述和系统使用的变量。@H_403_3@

#003 /* FCB header required by ROS/NT */@H_403_3@

#004 FSRTL_COMMON_FCB_HEADER RFCB;@H_403_3@

@H_403_3@

指向每个文件的数据段指针。@H_403_3@

#005 SECTION_OBJECT_POINTERS SectionObjectPointers;@H_403_3@

#006 ERESOURCE MainResource;@H_403_3@

#007 ERESOURCE PagingIoResource;@H_403_3@

#008 /* end FCB header required by ROS/NT */@H_403_3@

#009 @H_403_3@

@H_403_3@

这个目录或文件的目录入口指针。@H_403_3@

#010 /* directory entry for this file or directory */@H_403_3@

#011 DIR_ENTRY entry;@H_403_3@

#012 @H_403_3@

@H_403_3@

指向属性的入口。@H_403_3@

#013 /* Pointer to attributes in entry */@H_403_3@

#014 PUCHAR Attributes;@H_403_3@

#015 @H_403_3@

@H_403_3@

保存长文件名称。@H_403_3@

#016 /* long file name,points into PathNameBuffer */@H_403_3@

#017 UNICODE_STRING LongNameU;@H_403_3@

#018 @H_403_3@

@H_403_3@

保存短文件名称。@H_403_3@

#019 /* short file name */@H_403_3@

#020 UNICODE_STRING ShortNameU;@H_403_3@

#021 @H_403_3@

@H_403_3@

保存目录的名称。@H_403_3@

#022 /* directory name,points into PathNameBuffer */@H_403_3@

#023 UNICODE_STRING DirNameU;@H_403_3@

#024 @H_403_3@

@H_403_3@

保存路径和文件名称，最大260个字节。@H_403_3@

#025 /* path + long file name 260 max*/@H_403_3@

#026 UNICODE_STRING PathNameU;@H_403_3@

#027 @H_403_3@

@H_403_3@

保存路径名称。@H_403_3@

#028 /* buffer for PathNameU */@H_403_3@

#029 PWCHAR PathNameBuffer;@H_403_3@

#030 @H_403_3@

@H_403_3@

保存短名称。@H_403_3@

#031 /* buffer for ShortNameU */@H_403_3@

#032 WCHAR ShortNameBuffer[13];@H_403_3@

#033 @H_403_3@

@H_403_3@

文件控制块的引用计数。@H_403_3@

#034 /* */@H_403_3@

#035 LONG RefCount;@H_403_3@

#036 @H_403_3@

@H_403_3@

保存这个分卷有多少个文件控制块。@H_403_3@

#037 /* List of FCB's for this volume */@H_403_3@

#038 LIST_ENTRY FcbListEntry;@H_403_3@

#039 @H_403_3@

@H_403_3@

指向父文件控制块的指针。@H_403_3@

#040 /* pointer to the parent fcb */@H_403_3@

#041 struct _VFATFCB* parentFcb;@H_403_3@

#042 @H_403_3@

@H_403_3@

控制块的标志保存。@H_403_3@

#043 /* Flags for the fcb */@H_403_3@

#044 ULONG Flags;@H_403_3@

#045 @H_403_3@

@H_403_3@

关联这个文件控制块与文件对象。@H_403_3@

#046 /* pointer to the file object which has initialized the fcb */@H_403_3@

#047 PFILE_OBJECT FileObject;@H_403_3@

#048 @H_403_3@

@H_403_3@

短文件名称的目录索引。@H_403_3@

#049 /* Directory index for the short name entry */@H_403_3@

#050 ULONG dirIndex;@H_403_3@

#051 @H_403_3@

@H_403_3@

长文件名称的目录索引。@H_403_3@

#052 /* Directory index where the long name starts */@H_403_3@

#053 ULONG startIndex;@H_403_3@

#054 @H_403_3@

@H_403_3@

共享访问文件对象标志。@H_403_3@

#055 /* Share access for the file object */@H_403_3@

#056 SHARE_ACCESS FCBShareAccess;@H_403_3@

#057 @H_403_3@

@H_403_3@

打开文件次数计数。@H_403_3@

#058 /* Incremented on IRP_MJ_CREATE,decremented on IRP_MJ_CLEANUP */@H_403_3@

#059 ULONG OpenHandleCount;@H_403_3@

#060 @H_403_3@

@H_403_3@

路径名称和长文件名称在HASH表里的位置。@H_403_3@

#061 /* Entry into the hash table for the path + long name */@H_403_3@

#062 HASHENTRY Hash;@H_403_3@

#063 @H_403_3@

@H_403_3@

路径名称和短文件名称在HASH表里的位置。@H_403_3@

#064 /* Entry into the hash table for the path + short name */@H_403_3@

#065 HASHENTRY ShortHash;@H_403_3@

#066 @H_403_3@

@H_403_3@

文件锁住范围。@H_403_3@

#067 /* List of byte-range locks for this file */@H_403_3@

#068 FILE_LOCK FileLock;@H_403_3@

#069 @H_403_3@

@H_403_3@

保存最后读写的簇和位置。@H_403_3@

#070 /*@H_403_3@

#071 * Optimalization: caching of last read/write cluster+offset pair. Can't@H_403_3@

#072 * be in VFATCCB because it must be reset everytime the allocated clusters@H_403_3@

#073 * change.@H_403_3@

#074 */@H_403_3@

#075 FAST_MUTEX LastMutex;@H_403_3@

#076 ULONG LastCluster;@H_403_3@

#077 ULONG LastOffset;@H_403_3@

#078} VFATFCB,*PVFATFCB;@H_403_3@