On Mon 24-11-14 11:23:19, David Drysdale wrote:
> Fix clashing values for O_PATH and FMODE_NONOTIFY on sparc.
> The clashing O_PATH value was added in 5229645bdc35f1cc43eb ("vfs: add
> nonconflicting values for O_PATH") but this can't be changed as it
> is user-visible.
>
> FMODE_NONOTIFY is only used internally in the kernel, but it is in
> the same numbering space as the other O_* flags, as indicated by the
> comment at the top of include/uapi/asm-generic/fcntl.h (and its use
> in fs/notify/fanotify/fanotify_user.c). So renumber it to avoid
> the clash.
>
> All of this has happened before (12ed2e36c98aec6c4155, "fanotify:
> FMODE_NONOTIFY and __O_SYNC in sparc conflict"), and all of this
> will happen again -- so update the uniqueness check in fcntl_init()
> to include __FMODE_NONOTIFY.
>
> Signed-off-by: David Drysdale <drysdale@xxxxxxxxxx>
> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
Looks good. You can add:
Acked-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/fcntl.c | 5 +++--
> include/linux/fs.h | 2 +-
> include/uapi/asm-generic/fcntl.h | 2 +-
> 3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/fs/fcntl.c b/fs/fcntl.c
> index 99d440a4a6ba..ee85cd4e136a 100644
> --- a/fs/fcntl.c
> +++ b/fs/fcntl.c
> @@ -740,14 +740,15 @@ 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(20 - 1 /* for O_RDONLY being 0 */ != HWEIGHT32(
> + 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_EXEC | O_PATH | __O_TMPFILE |
> + __FMODE_NONOTIFY
> ));
>
> fasync_cache = kmem_cache_create("fasync_cache",
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 9ab779e8a63c..fc1c2488adbc 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -134,7 +134,7 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
> #define FMODE_CAN_WRITE ((__force fmode_t)0x40000)
>
> /* File was opened by fanotify and shouldn't generate fanotify events */
> -#define FMODE_NONOTIFY ((__force fmode_t)0x1000000)
> +#define FMODE_NONOTIFY ((__force fmode_t)0x4000000)
>
> /*
> * Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
> diff --git a/include/uapi/asm-generic/fcntl.h b/include/uapi/asm-generic/fcntl.h
> index 7543b3e51331..e063effe0cc1 100644
> --- a/include/uapi/asm-generic/fcntl.h
> +++ b/include/uapi/asm-generic/fcntl.h
> @@ -5,7 +5,7 @@
>
> /*
> * FMODE_EXEC is 0x20
> - * FMODE_NONOTIFY is 0x1000000
> + * FMODE_NONOTIFY is 0x4000000
> * These cannot be used by userspace O_* until internal and external open
> * flags are split.
> * -Eric Paris
> --
> 2.1.0.rc2.206.gedb03e5
>
--
Jan Kara <jack@xxxxxxx>
SUSE Labs, CR
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