Consolidate non cancellable openat call

This patch consolidates all the non cancellable openat{64} calls to use
the __openat{64}_nocancel identifier.  For non cancellable targets it will
be just a macro to call the default respective symbol while on Linux
will be a internal one.

Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu.

	* sysdeps/generic/not-cancel.h (openat_not_cancel): Remove macro.
	(openat_not_cancel_3): Likewise.
	(openat64_not_cancel_3): Likewise).
	(openat_not_cancel_3): Likewise).
	* sysdeps/unix/sysv/linux/not-cancel.h (openat_not_cancel): Remove
	macro.
	(openat_not_cancel_3): Likewise.
	(openat64_not_cancel): Likewise.
	(openat64_not_cancel_3): Likewise.
	* sysdeps/unix/sysv/linux/openat.c (__openat_nocancel): New function.
	* sysdeps/unix/sysv/linux/openat64.c (__openat64_nocancel): Likewise.
	* io/ftw.c (open_dir_stream): Replace openat{64}_not_cancel{_3} with
	__open{64}_nocancel.
	* sysdeps/mach/hurd/opendir.c (__opendirat): Likewise.
	* sysdeps/posix/getcwd.c (__getcwd): Likewise.
	* sysdeps/posix/opendir.c (__opendirat): Likewise.

9 files changed, 87 insertions, 30 deletions

diff --git a/ChangeLog b/ChangeLog
index 1751cfb7ed..4cdf2f7616 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2017-08-18  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+
+	* sysdeps/generic/not-cancel.h (openat_not_cancel): Remove macro.
+	(openat_not_cancel_3): Likewise.
+	(openat64_not_cancel_3): Likewise).
+	(openat_not_cancel_3): Likewise).
+	* sysdeps/unix/sysv/linux/not-cancel.h (openat_not_cancel): Remove
+	macro.
+	(openat_not_cancel_3): Likewise.
+	(openat64_not_cancel): Likewise.
+	(openat64_not_cancel_3): Likewise.
+	* sysdeps/unix/sysv/linux/openat.c (__openat_nocancel): New function.
+	* sysdeps/unix/sysv/linux/openat64.c (__openat64_nocancel): Likewise.
+	* io/ftw.c (open_dir_stream): Replace openat{64}_not_cancel{_3} with
+	__open{64}_nocancel.
+	* sysdeps/mach/hurd/opendir.c (__opendirat): Likewise.
+	* sysdeps/posix/getcwd.c (__getcwd): Likewise.
+	* sysdeps/posix/opendir.c (__opendirat): Likewise.
+
 2017-08-18  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #18822]
diff --git a/io/ftw.c b/io/ftw.c
index 140a237746..f33fed327d 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -337,8 +337,8 @@ open_dir_stream (int *dfdp, struct ftw_data *data, struct dir_data *dirp)
 
       if (dfdp != NULL && *dfdp != -1)
 	{
-	  int fd = openat64_not_cancel_3 (*dfdp, data->dirbuf + data->ftw.base,
-					  O_RDONLY | O_DIRECTORY | O_NDELAY);
+	  int fd = __openat64_nocancel (*dfdp, data->dirbuf + data->ftw.base,
+					O_RDONLY | O_DIRECTORY | O_NDELAY);
 	  dirp->stream = NULL;
 	  if (fd != -1 && (dirp->stream = __fdopendir (fd)) == NULL)
 	    close_not_cancel_no_status (fd);
diff --git a/sysdeps/generic/not-cancel.h b/sysdeps/generic/not-cancel.h
index e91cb6cced..df9aea640b 100644
--- a/sysdeps/generic/not-cancel.h
+++ b/sysdeps/generic/not-cancel.h
@@ -22,14 +22,10 @@
   __open (__VA_ARGS__)
 #define __open64_nocancel(...) \
   __open64 (__VA_ARGS__)
-#define openat_not_cancel(fd, name, flags, mode) \
-  __openat (fd, name, flags, mode)
-#define openat_not_cancel_3(fd, name, flags) \
-  __openat (fd, name, flags, 0)
-#define openat64_not_cancel(fd, name, flags, mode) \
-  __openat64 (fd, name, flags, mode)
-#define openat64_not_cancel_3(fd, name, flags) \
-  __openat64 (fd, name, flags, 0)
+#define __openat_nocancel(...) \
+  __openat (__VA_ARGS__)
+#define __openat64_nocancel(...) \
+  __openat64 (__VA_ARGS__)
 #define close_not_cancel(fd) \
   __close (fd)
 #define close_not_cancel_no_status(fd) \
diff --git a/sysdeps/mach/hurd/opendir.c b/sysdeps/mach/hurd/opendir.c
index 8db70b2842..d3757f00fa 100644
--- a/sysdeps/mach/hurd/opendir.c
+++ b/sysdeps/mach/hurd/opendir.c
@@ -86,7 +86,7 @@ __opendirat (int dfd, const char *name)
   assert (dfd == AT_FDCWD);
   fd = __open_nocancel (name, flags);
 #else
-  fd = openat_not_cancel_3 (dfd, name, flags);
+  fd = __openat_nocancel (dfd, name, flags);
 #endif
   if (fd < 0)
     return NULL;
diff --git a/sysdeps/posix/getcwd.c b/sysdeps/posix/getcwd.c
index 75bcfd23cf..caa352732a 100644
--- a/sysdeps/posix/getcwd.c
+++ b/sysdeps/posix/getcwd.c
@@ -175,7 +175,7 @@ extern char *alloca ();
 # include <not-cancel.h>
 # include <kernel-features.h>
 #else
-# define openat64_not_cancel_3(dfd, name, mode) openat64 (dfd, name, mode)
+# define __openat64_nocancel(dfd, name, mode) openat64 (dfd, name, mode)
 # define close_not_cancel_no_status(fd) close (fd)
 #endif
 
@@ -281,7 +281,7 @@ __getcwd (char *buf, size_t size)
   while (!(thisdev == rootdev && thisino == rootino))
     {
       if (__have_atfcts >= 0)
-	  fd = openat64_not_cancel_3 (fd, "..", O_RDONLY | O_CLOEXEC);
+	  fd = __openat64_nocancel (fd, "..", O_RDONLY | O_CLOEXEC);
       else
 	fd = -1;
       if (fd >= 0)
diff --git a/sysdeps/posix/opendir.c b/sysdeps/posix/opendir.c
index 3ee27b297b..51a92e853c 100644
--- a/sysdeps/posix/opendir.c
+++ b/sysdeps/posix/opendir.c
@@ -161,7 +161,7 @@ __opendirat (int dfd, const char *name)
 	}
     }
 
-  return opendir_tail (openat_not_cancel_3 (dfd, name, opendir_oflags));
+  return opendir_tail (__openat_nocancel (dfd, name, opendir_oflags));
 }
 #endif
 
diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
index 84dc72a1f2..08ad773486 100644
--- a/sysdeps/unix/sysv/linux/not-cancel.h
+++ b/sysdeps/unix/sysv/linux/not-cancel.h
@@ -34,6 +34,14 @@ libc_hidden_proto (__open_nocancel)
 __typeof (open64) __open64_nocancel;
 libc_hidden_proto (__open64_nocancel)
 
+/* Non cancellable openat syscall.  */
+__typeof (openat) __openat_nocancel;
+libc_hidden_proto (__openat_nocancel)
+
+/* Non cacellable openat syscall (LFS version).  */
+__typeof (openat64) __openat64_nocancel;
+libc_hidden_proto (__openat64_nocancel)
+
 /* Non cancellable read syscall.  */
 __typeof (__read) __read_nocancel;
 libc_hidden_proto (__read_nocancel)
@@ -42,16 +50,6 @@ libc_hidden_proto (__read_nocancel)
 __typeof (__write) __write_nocancel;
 libc_hidden_proto (__write_nocancel)
 
-/* Uncancelable openat.  */
-#define openat_not_cancel(fd, fname, oflag, mode) \
-  INLINE_SYSCALL (openat, 4, fd, fname, oflag, mode)
-#define openat_not_cancel_3(fd, fname, oflag) \
-  INLINE_SYSCALL (openat, 3, fd, fname, oflag)
-#define openat64_not_cancel(fd, fname, oflag, mode) \
-  INLINE_SYSCALL (openat, 4, fd, fname, oflag | O_LARGEFILE, mode)
-#define openat64_not_cancel_3(fd, fname, oflag) \
-  INLINE_SYSCALL (openat, 3, fd, fname, oflag | O_LARGEFILE)
-
 /* Uncancelable close.  */
 #define __close_nocancel(fd) \
   INLINE_SYSCALL (close, 1, fd)
diff --git a/sysdeps/unix/sysv/linux/openat.c b/sysdeps/unix/sysv/linux/openat.c
index 158730596d..05c1b397f1 100644
--- a/sysdeps/unix/sysv/linux/openat.c
+++ b/sysdeps/unix/sysv/linux/openat.c
@@ -19,6 +19,7 @@
 #include <stdarg.h>
 
 #include <sysdep-cancel.h>
+#include <not-cancel.h>
 
 #ifndef __OFF_T_MATCHES_OFF64_T
 
@@ -43,4 +44,23 @@ weak_alias (__libc_openat, __openat)
 libc_hidden_weak (__openat)
 weak_alias (__libc_openat, openat)
 
+# if !IS_IN (rtld)
+int
+__openat_nocancel (int fd, const char *file, int oflag, ...)
+{
+  mode_t mode = 0;
+  if (__OPEN_NEEDS_MODE (oflag))
+    {
+      va_list arg;
+      va_start (arg, oflag);
+      mode = va_arg (arg, mode_t);
+      va_end (arg);
+    }
+
+  return INLINE_SYSCALL_CALL (openat, fd, file, oflag, mode);
+}
+# else
+strong_alias (__libc_openat, __openat_nocancel)
+# endif
+libc_hidden_weak (__openat_nocancel)
 #endif
diff --git a/sysdeps/unix/sysv/linux/openat64.c b/sysdeps/unix/sysv/linux/openat64.c
index 4942061671..816e8f17ec 100644
--- a/sysdeps/unix/sysv/linux/openat64.c
+++ b/sysdeps/unix/sysv/linux/openat64.c
@@ -19,6 +19,13 @@
 #include <stdarg.h>
 
 #include <sysdep-cancel.h>
+#include <not-cancel.h>
+
+#ifdef __OFF_T_MATCHES_OFF64_T
+# define EXTRA_OPEN_FLAGS 0
+#else
+# define EXTRA_OPEN_FLAGS O_LARGEFILE
+#endif
 
 /* Open FILE with access OFLAG.  Interpret relative paths relative to
    the directory associated with FD.  If OFLAG includes O_CREAT or
@@ -35,12 +42,6 @@ __libc_openat64 (int fd, const char *file, int oflag, ...)
       va_end (arg);
     }
 
-#ifdef __OFF_T_MATCHES_OFF64_T
-# define EXTRA_OPEN_FLAGS 0
-#else
-# define EXTRA_OPEN_FLAGS O_LARGEFILE
-#endif
-
   return SYSCALL_CANCEL (openat, fd, file, oflag | EXTRA_OPEN_FLAGS, mode);
 }
 
@@ -48,8 +49,31 @@ strong_alias (__libc_openat64, __openat64)
 libc_hidden_weak (__openat64)
 weak_alias (__libc_openat64, openat64)
 
+#if !IS_IN (rtld)
+int
+__openat64_nocancel (int fd, const char *file, int oflag, ...)
+{
+  mode_t mode = 0;
+  if (__OPEN_NEEDS_MODE (oflag))
+    {
+      va_list arg;
+      va_start (arg, oflag);
+      mode = va_arg (arg, mode_t);
+      va_end (arg);
+    }
+
+  return INLINE_SYSCALL_CALL (openat, fd, file, oflag | EXTRA_OPEN_FLAGS,
+			      mode);
+}
+#else
+strong_alias (__libc_openat64, __openat64_nocancel)
+#endif
+libc_hidden_def (__openat64_nocancel)
+
 #ifdef __OFF_T_MATCHES_OFF64_T
 strong_alias (__libc_openat64, __openat)
 libc_hidden_weak (__openat)
 weak_alias (__libc_openat64, openat)
+
+strong_alias (__openat64_nocancel, __openat_nocancel)
 #endif