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| author |   Yury Norov <ynorov@caviumnetworks.com> | 2018-05-16 11:18:49 +0300 |
|---|---|---|
| committer |   Arnd Bergmann <arnd@arndb.de> | 2019-02-19 10:10:05 +0100 |
| commit | 942fa985e9f161ac018ce2230d3e6f7668cca6ac (patch) | |
| tree | c4f0d0fead0b4a0af0a1f6ecf87d8f79295b9485 /include/linux/fcntl.h | |
| parent | compat ABI: use non-compat openat and open_by_handle_at variants (diff) | |
| download | wireguard-linux-942fa985e9f161ac018ce2230d3e6f7668cca6ac.tar.xz wireguard-linux-942fa985e9f161ac018ce2230d3e6f7668cca6ac.zip | |
32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
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>
Diffstat (limited to 'include/linux/fcntl.h')
| -rw-r--r-- | include/linux/fcntl.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h index 27dc7a60693e..d019df946cb2 100644 --- a/include/linux/fcntl.h +++ b/include/linux/fcntl.h @@ -12,7 +12,7 @@ O_NOATIME | O_CLOEXEC | O_PATH | __O_TMPFILE) #ifndef force_o_largefile -#define force_o_largefile() (BITS_PER_LONG != 32) +#define force_o_largefile() (!IS_ENABLED(CONFIG_ARCH_32BIT_OFF_T)) #endif #if BITS_PER_LONG == 32 |