File system access library.
diff --git a/src/libdiskfs/fsys.c b/src/libdiskfs/fsys.c
new file mode 100644
index 0000000..3875e50
--- /dev/null
+++ b/src/libdiskfs/fsys.c
@@ -0,0 +1,114 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <sunrpc.h>
+#include <nfs3.h>
+#include <diskfs.h>
+
+int allowall;
+
+static Fsys *(*opentab[])(Disk*) =
+{
+ fsysopenffs,
+ fsysopenkfs,
+ fsysopenext2,
+ fsysopenfat,
+};
+
+Fsys*
+fsysopen(Disk *disk)
+{
+ int i;
+ Fsys *fsys;
+
+ for(i=0; i<nelem(opentab); i++)
+ if((fsys = (*opentab[i])(disk)) != nil)
+ return fsys;
+ return nil;
+}
+
+Block*
+fsysreadblock(Fsys *fsys, u64int blockno)
+{
+ if(!fsys->_readblock){
+ werrstr("no read dispatch function");
+ return nil;
+ }
+ return (*fsys->_readblock)(fsys, blockno);
+}
+
+int
+fsyssync(Fsys *fsys)
+{
+ if(disksync(fsys->disk) < 0)
+ return -1;
+ if(!fsys->_sync)
+ return 0;
+ return (*fsys->_sync)(fsys);
+}
+
+void
+fsysclose(Fsys *fsys)
+{
+ if(!fsys->_close){
+ fprint(2, "no fsysClose\n");
+ abort();
+ }
+ (*fsys->_close)(fsys);
+}
+
+Nfs3Status
+fsysroot(Fsys *fsys, Nfs3Handle *h)
+{
+ if(!fsys->_root)
+ return Nfs3ErrNxio;
+ return (*fsys->_root)(fsys, h);
+}
+
+Nfs3Status
+fsyslookup(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
+{
+ if(!fsys->_lookup)
+ return Nfs3ErrNxio;
+ return (*fsys->_lookup)(fsys, au, h, name, nh);
+}
+
+Nfs3Status
+fsysgetattr(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
+{
+ if(!fsys->_getattr)
+ return Nfs3ErrNxio;
+ return (*fsys->_getattr)(fsys, au, h, attr);
+}
+
+Nfs3Status
+fsysreaddir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cookie, uchar **e, u32int *ne, u1int *peof)
+{
+ if(!fsys->_readdir)
+ return Nfs3ErrNxio;
+ return (*fsys->_readdir)(fsys, au, h, count, cookie, e, ne, peof);
+}
+
+Nfs3Status
+fsysreadfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int offset, uchar **data, u32int *pcount, uchar *peof)
+{
+ if(!fsys->_readfile)
+ return Nfs3ErrNxio;
+ return (*fsys->_readfile)(fsys, au, h, count, offset, data, pcount, peof);
+}
+
+Nfs3Status
+fsysreadlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **plink)
+{
+ if(!fsys->_readlink)
+ return Nfs3ErrNxio;
+ return (*fsys->_readlink)(fsys, au, h, plink);
+}
+
+Nfs3Status
+fsysaccess(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
+{
+ if(!fsys->_access)
+ return Nfs3ErrNxio;
+ return (*fsys->_access)(fsys, au, h, want, got, attr);
+}
