[PATCH] hurd: Fix F_*LK* fcntl with __USE_FILE_OFFSET64

[Samuel Thibault]

struct flock64 uses 64bit values.  This introduces other values for
F_GETLK, F_SETLK, F_SETLKW to distinguish between both.

* sysdeps/mach/hurd/bits/fcntl.h (F_GETLK64, F_SETLK64, F_SETLKW64): New
macros
[__USE_FILE_OFFSET64] (F_GETLK, F_SETLK, F_SETLKW): Define to F_GETLK64,
F_SETLK64, F_SETLKW64, respectively.
* sysdeps/mach/hurd/f_setlk.c: New file.
* sysdeps/mach/hurd/f_setlk.h: New file.
* sysdeps/mach/hurd/fcntl.c (__libc_fcntl): Include "f_setlk.h",
make F_SETLK and F_SETLKW call __f_setlk instead of __flock.
Handle F_GETLK64, F_SETLK64, F_SETLKW64 cases.

---
 sysdeps/mach/hurd/bits/fcntl.h | 15 ++++++++--
 sysdeps/mach/hurd/f_setlk.c    | 68 ++++++++++++++++++++++++++++++++++++++++++
 sysdeps/mach/hurd/f_setlk.h    | 22 ++++++++++++++
 sysdeps/mach/hurd/fcntl.c      | 57 ++++++++++++++++-------------------
 4 files changed, 127 insertions(+), 35 deletions(-)

diff --git a/sysdeps/mach/hurd/bits/fcntl.h b/sysdeps/mach/hurd/bits/fcntl.h
index 135aba3..9460be7 100644
--- a/sysdeps/mach/hurd/bits/fcntl.h
+++ b/sysdeps/mach/hurd/bits/fcntl.h
@@ -163,9 +163,18 @@
 # define F_GETOWN      5       /* Get owner (receiver of SIGIO).  */
 # define F_SETOWN      6       /* Set owner (receiver of SIGIO).  */
 #endif
-#define        F_GETLK         7       /* Get record locking info.  */
-#define        F_SETLK         8       /* Set record locking info 
(non-blocking).  */
-#define        F_SETLKW        9       /* Set record locking info (blocking).  
*/
+#ifdef __USE_FILE_OFFSET64
+# define       F_GETLK         F_GETLK64
+# define       F_SETLK         F_SETLK64
+# define       F_SETLKW        F_SETLKW64
+#else
+# define       F_GETLK         7       /* Get record locking info.  */
+# define       F_SETLK         8       /* Set record locking info 
(non-blocking).  */
+# define       F_SETLKW        9       /* Set record locking info (blocking).  
*/
+#endif
+#define        F_GETLK64       10      /* Get record locking info.  */
+#define        F_SETLK64       11      /* Set record locking info 
(non-blocking).  */
+#define        F_SETLKW64      12      /* Set record locking info (blocking).  
*/
 
 #ifdef __USE_XOPEN2K8
 # define F_DUPFD_CLOEXEC 1030  /* Duplicate, set FD_CLOEXEC on new one.  */
diff --git a/sysdeps/mach/hurd/f_setlk.c b/sysdeps/mach/hurd/f_setlk.c
new file mode 100644
index 0000000..9c898b1
--- /dev/null
+++ b/sysdeps/mach/hurd/f_setlk.c
@@ -0,0 +1,68 @@
+/* Copyright (C) 2014-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <fcntl.h>
+#include <errno.h>
+
+/* XXX
+   We need new RPCs to support POSIX.1 fcntl file locking!!
+   For the time being we support the whole-file case only,
+   with all kinds of WRONG WRONG WRONG semantics,
+   by using flock.  This is definitely the Wrong Thing,
+   but it might be better than nothing (?).  */
+int
+__f_setlk (int fd, int type, int whence, __off64_t start, __off64_t len, int 
wait)
+{
+  int cmd;
+
+  switch (type)
+    {
+    case F_RDLCK: cmd |= LOCK_SH; break;
+    case F_WRLCK: cmd |= LOCK_EX; break;
+    case F_UNLCK: cmd = LOCK_UN; break;
+    default:
+      errno = EINVAL;
+      return -1;
+    }
+
+  if (wait == 0)
+    cmd |= LOCK_NB;
+
+  switch (whence)
+    {
+    case SEEK_SET:
+      if (start == 0 && len == 0) /* Whole file request.  */
+       break;
+      /* It seems to be common for applications to lock the first
+        byte of the file when they are really doing whole-file locking.
+        So, since it's so wrong already, might as well do that too.  */
+      if (start == 0 && len == 1)
+       break;
+      /* FALLTHROUGH */
+    case SEEK_CUR:
+    case SEEK_END:
+      errno = ENOTSUP;
+      return -1;
+    default:
+      errno = EINVAL;
+      return -1;
+    }
+
+  return __flock (fd, cmd);
+}
diff --git a/sysdeps/mach/hurd/f_setlk.h b/sysdeps/mach/hurd/f_setlk.h
new file mode 100644
index 0000000..a9d09fd
--- /dev/null
+++ b/sysdeps/mach/hurd/f_setlk.h
@@ -0,0 +1,22 @@
+/* Copyright (C) 2014-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _F_SETLK_H
+#define _F_SETLK_H 1
+
+extern int __f_setlk (int fd, int type, int whence, __off64_t start, __off64_t 
len, int wait);
+#endif /* f_setlk.h */
diff --git a/sysdeps/mach/hurd/fcntl.c b/sysdeps/mach/hurd/fcntl.c
index 8f4bf3f..a7ef21b 100644
--- a/sysdeps/mach/hurd/fcntl.c
+++ b/sysdeps/mach/hurd/fcntl.c
@@ -21,6 +21,7 @@
 #include <hurd/fd.h>
 #include <stdarg.h>
 #include <sys/file.h>          /* XXX for LOCK_* */
+#include "f_setlk.h"
 
 /* Perform file control operations on FD.  */
 int
@@ -128,56 +129,48 @@ __libc_fcntl (int fd, int cmd, ...)
     case F_SETLK:
     case F_SETLKW:
       {
-       /* XXX
-          We need new RPCs to support POSIX.1 fcntl file locking!!
-          For the time being we support the whole-file case only,
-          with all kinds of WRONG WRONG WRONG semantics,
-          by using flock.  This is definitely the Wrong Thing,
-          but it might be better than nothing (?).  */
        struct flock *fl = va_arg (ap, struct flock *);
+       int wait = 0;
        va_end (ap);
        switch (cmd)
          {
          case F_GETLK:
            errno = ENOSYS;
            return -1;
+         case F_SETLKW:
+           wait = 1;
+           /* FALLTHROUGH */
          case F_SETLK:
-           cmd = LOCK_NB;
-           break;
-         default:
-           cmd = 0;
-           break;
-         }
-       switch (fl->l_type)
-         {
-         case F_RDLCK: cmd |= LOCK_SH; break;
-         case F_WRLCK: cmd |= LOCK_EX; break;
-         case F_UNLCK: cmd |= LOCK_UN; break;
+           return __f_setlk (fd, fl->l_type, fl->l_whence,
+                             fl->l_start, fl->l_end, wait);
          default:
            errno = EINVAL;
            return -1;
          }
-       switch (fl->l_whence)
+      }
+
+    case F_GETLK64:
+    case F_SETLK64:
+    case F_SETLKW64:
+      {
+       struct flock64 *fl64 = va_arg (ap, struct flock64 *);
+       int wait = 0;
+       va_end (ap);
+       switch (cmd)
          {
-         case SEEK_SET:
-           if (fl->l_start == 0 && fl->l_len == 0) /* Whole file request.  */
-             break;
-           /* It seems to be common for applications to lock the first
-              byte of the file when they are really doing whole-file locking.
-              So, since it's so wrong already, might as well do that too.  */
-           if (fl->l_start == 0 && fl->l_len == 1)
-             break;
-           /* FALLTHROUGH */
-         case SEEK_CUR:
-         case SEEK_END:
-           errno = ENOTSUP;
+         case F_GETLK64:
+           errno = ENOSYS;
            return -1;
+         case F_SETLK64:
+           wait = 1;
+           /* FALLTHROUGH */
+         case F_SETLKW64:
+           return __f_setlk (fd, fl->l_type, fl->l_whence,
+                             fl->l_start, fl->l_end, wait);
          default:
            errno = EINVAL;
            return -1;
          }
-
-       return __flock (fd, cmd);
       }
 
     case F_GETFL:              /* Get per-open flags.  */
-- 
tg: (fa3aae8..) t/lockf64 (depends on: baseline t/WRLCK-upgrade)