mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Yury Norov](/assets/img/avatar_default.png)
All new 32-bit architectures should have 64-bit userspace off_t type, but existing architectures has 32-bit ones. To enforce the rule, new config option is added to arch/Kconfig that defaults ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing 32-bit architectures enable it explicitly. New option affects force_o_largefile() behaviour. Namely, if userspace off_t is 64-bits long, we have no reason to reject user to open big files. Note that even if architectures has only 64-bit off_t in the kernel (arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32), a libc may use 32-bit off_t, and therefore want to limit the file size to 4GB unless specified differently in the open flags. Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Yury Norov <ynorov@marvell.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_FCNTL_H
|
|
#define _LINUX_FCNTL_H
|
|
|
|
#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() (!IS_ENABLED(CONFIG_ARCH_32BIT_OFF_T))
|
|
#endif
|
|
|
|
#if BITS_PER_LONG == 32
|
|
#define IS_GETLK32(cmd) ((cmd) == F_GETLK)
|
|
#define IS_SETLK32(cmd) ((cmd) == F_SETLK)
|
|
#define IS_SETLKW32(cmd) ((cmd) == F_SETLKW)
|
|
#define IS_GETLK64(cmd) ((cmd) == F_GETLK64)
|
|
#define IS_SETLK64(cmd) ((cmd) == F_SETLK64)
|
|
#define IS_SETLKW64(cmd) ((cmd) == F_SETLKW64)
|
|
#else
|
|
#define IS_GETLK32(cmd) (0)
|
|
#define IS_SETLK32(cmd) (0)
|
|
#define IS_SETLKW32(cmd) (0)
|
|
#define IS_GETLK64(cmd) ((cmd) == F_GETLK)
|
|
#define IS_SETLK64(cmd) ((cmd) == F_SETLK)
|
|
#define IS_SETLKW64(cmd) ((cmd) == F_SETLKW)
|
|
#endif /* BITS_PER_LONG == 32 */
|
|
|
|
#define IS_GETLK(cmd) (IS_GETLK32(cmd) || IS_GETLK64(cmd))
|
|
#define IS_SETLK(cmd) (IS_SETLK32(cmd) || IS_SETLK64(cmd))
|
|
#define IS_SETLKW(cmd) (IS_SETLKW32(cmd) || IS_SETLKW64(cmd))
|
|
|
|
#endif
|