[01/44] Implement read(2)/write(2) and neccessary lseek(2) for posix shmfd. Add MAC framework entries for posix shm read and write.

Message ID 20180809060936.9726-2-sebastian.huber@embedded-brains.de
State New
Headers show
Series
  • Update RTEMS-specific header files to latest FreeBSD versions
Related show

Commit Message

Sebastian Huber Aug. 9, 2018, 6:08 a.m.
From: kib <kib@FreeBSD.org>


Do not allow implicit extension of the underlying memory segment past
the limit set by ftruncate(2) by either of the syscalls.  Read and
write returns short i/o, lseek(2) fails with EINVAL when resulting
offset does not fit into the limit.

Discussed with:	alc
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
---
 newlib/libc/sys/rtems/include/sys/mman.h | 7 +++++++
 1 file changed, 7 insertions(+)

-- 
2.13.7

Patch

diff --git a/newlib/libc/sys/rtems/include/sys/mman.h b/newlib/libc/sys/rtems/include/sys/mman.h
index e7e5cf46b..536bfd562 100644
--- a/newlib/libc/sys/rtems/include/sys/mman.h
+++ b/newlib/libc/sys/rtems/include/sys/mman.h
@@ -190,6 +190,10 @@  typedef	__size_t	size_t;
 #endif
 
 #if defined(_KERNEL) || defined(_WANT_FILE)
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/queue.h>
+#include <sys/rangelock.h>
 #include <vm/vm.h>
 
 struct file;
@@ -215,6 +219,9 @@  struct shmfd {
 
 	struct label	*shm_label;		/* MAC label */
 	const char	*shm_path;
+
+	struct rangelock shm_rl;
+	struct mtx	shm_mtx;
 };
 #endif