From: Zheng Liu Subject: [RFC][PATCH 1/3] vfs: add FALLOC_FL_NO_HIDE_STALE flag in fallocate Date: Wed, 18 Apr 2012 00:53:36 +0800 Message-ID: <1334681618-9452-2-git-send-email-wenqing.lz@taobao.com> References: <1334681618-9452-1-git-send-email-wenqing.lz@taobao.com> Cc: Zheng Liu To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org Return-path: In-Reply-To: <1334681618-9452-1-git-send-email-wenqing.lz@taobao.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org From: Zheng Liu FALLOC_FL_NO_HIDE_STALE flag is defined in fallocate for avoiding a uninitialized->initialized conversion. Signed-off-by: Zheng Liu --- fs/open.c | 2 +- include/linux/falloc.h | 5 +++++ 2 files changed, 6 insertions(+), 1 deletions(-) diff --git a/fs/open.c b/fs/open.c index 5720854..1d3117f 100644 --- a/fs/open.c +++ b/fs/open.c @@ -223,7 +223,7 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len) return -EINVAL; /* Return error if mode is not supported */ - if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) + if (mode & ~FALLOC_FL_SUPPORTED_FLAGS) return -EOPNOTSUPP; /* Punch hole must have keep size set */ diff --git a/include/linux/falloc.h b/include/linux/falloc.h index 73e0b62..0d5d5aa 100644 --- a/include/linux/falloc.h +++ b/include/linux/falloc.h @@ -3,6 +3,11 @@ #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 /* no stale allocation */ + +#define FALLOC_FL_SUPPORTED_FLAGS (FALLOC_FL_KEEP_SIZE | \ + FALLOC_FL_PUNCH_HOLE | \ + FALLOC_FL_NO_HIDE_STALE) #ifdef __KERNEL__ -- 1.7.4.1