From 57413d8e172c10c90fbd91f98d0f7d8eb27e824c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 27 Aug 2024 08:50:47 +0200 Subject: fs: sort out the fallocate mode vs flag mess The fallocate system call takes a mode argument, but that argument contains a wild mix of exclusive modes and an optional flags. Replace FALLOC_FL_SUPPORTED_MASK with FALLOC_FL_MODE_MASK, which excludes the optional flag bit, so that we can use switch statement on the value to easily enumerate the cases while getting the check for duplicate modes for free. To make this (and in the future the file system implementations) more readable also add a symbolic name for the 0 mode used to allocate blocks. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20240827065123.1762168-4-hch@lst.de Reviewed-by: Darrick J. Wong Reviewed-by: Jan Kara Signed-off-by: Christian Brauner --- include/uapi/linux/falloc.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/linux/falloc.h') diff --git a/include/uapi/linux/falloc.h b/include/uapi/linux/falloc.h index 51398fa57f6c..5810371ed72b 100644 --- a/include/uapi/linux/falloc.h +++ b/include/uapi/linux/falloc.h @@ -2,6 +2,7 @@ #ifndef _UAPI_FALLOC_H_ #define _UAPI_FALLOC_H_ +#define FALLOC_FL_ALLOCATE_RANGE 0x00 /* allocate range */ #define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */ #define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */ #define FALLOC_FL_NO_HIDE_STALE 0x04 /* reserved codepoint */ -- cgit v1.2.3