This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
[PATCH 1/2] fs: add a VALID_OPEN_FLAGS
- From: Christoph Hellwig <hch at lst dot de>
- To: Linus Torvalds <torvalds at linux-foundation dot org>, Alexander Viro <viro at zeniv dot linux dot org dot uk>
- Cc: linux-api at vger dot kernel dot org, linux-fsdevel at vger dot kernel dot org, linux-kernel at vger dot kernel dot org, libc-alpha at sourceware dot org
- Date: Thu, 30 Mar 2017 18:33:26 +0200
- Subject: [PATCH 1/2] fs: add a VALID_OPEN_FLAGS
- Authentication-results: sourceware.org; auth=none
- References: <20170330163327.23920-1-hch@lst.de>
Add a central define for all valid open flags, and use it in the uniqueness
check.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/fcntl.c | 14 ++++----------
include/linux/fcntl.h | 6 ++++++
2 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/fs/fcntl.c b/fs/fcntl.c
index be8fbe289087..de1b16bb6a29 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -742,16 +742,10 @@ static int __init fcntl_init(void)
* Exceptions: O_NONBLOCK is a two bit define on parisc; O_NDELAY
* is defined as O_NONBLOCK on some platforms and not on others.
*/
- BUILD_BUG_ON(21 - 1 /* for O_RDONLY being 0 */ != HWEIGHT32(
- O_RDONLY | O_WRONLY | O_RDWR |
- O_CREAT | O_EXCL | O_NOCTTY |
- O_TRUNC | O_APPEND | /* O_NONBLOCK | */
- __O_SYNC | O_DSYNC | FASYNC |
- O_DIRECT | O_LARGEFILE | O_DIRECTORY |
- O_NOFOLLOW | O_NOATIME | O_CLOEXEC |
- __FMODE_EXEC | O_PATH | __O_TMPFILE |
- __FMODE_NONOTIFY
- ));
+ BUILD_BUG_ON(21 - 1 /* for O_RDONLY being 0 */ !=
+ HWEIGHT32(
+ (VALID_OPEN_FLAGS & ~(O_NONBLOCK | O_NDELAY)) |
+ __FMODE_EXEC | __FMODE_NONOTIFY));
fasync_cache = kmem_cache_create("fasync_cache",
sizeof(struct fasync_struct), 0, SLAB_PANIC, NULL);
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index 76ce329e656d..1b48d9c9a561 100644
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -3,6 +3,12 @@
#include <uapi/linux/fcntl.h>
+/* list of all valid flags for the open/openat flags argument: */
+#define VALID_OPEN_FLAGS \
+ (O_RDONLY | O_WRONLY | O_RDWR | O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC | \
+ O_APPEND | O_NDELAY | O_NONBLOCK | O_NDELAY | __O_SYNC | O_DSYNC | \
+ FASYNC | O_DIRECT | O_LARGEFILE | O_DIRECTORY | O_NOFOLLOW | \
+ O_NOATIME | O_CLOEXEC | O_PATH | __O_TMPFILE)
#ifndef force_o_largefile
#define force_o_largefile() (BITS_PER_LONG != 32)
--
2.11.0