linux-kernel - [PATCH v3] ext4: add FALLOC_FL_ALLOCATE

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Message-ID: <20250716030420.4528-2-chuguangqing@inspur.com>
Date: Wed, 16 Jul 2025 11:04:20 +0800
From: chuguangqing <chuguangqing@...pur.com>
To: Theodore Ts'o <tytso@....edu>, Andreas Dilger <adilger.kernel@...ger.ca>,
	Zhang Yi <yi.zhang@...wei.com>
CC: <linux-ext4@...r.kernel.org>, <linux-kernel@...r.kernel.org>, chuguangqing
	<chuguangqing@...pur.com>
Subject: [PATCH v3] ext4: add FALLOC_FL_ALLOCATE_RANGE to supported flags mask

Add FALLOC_FL_ALLOCATE_RANGE to the set of supported fallocate mode flags.
This change improves code clarity and maintains by explicitly showing
this flag in the supported flags mask.

Note that since FALLOC_FL_ALLOCATE_RANGE is defined as 0x00, this addition
has no functional modifications.

Signed-off-by: chuguangqing <chuguangqing@...pur.com>
---
 fs/ext4/extents.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index b43aa82c1b39..46cbb8697252 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4784,9 +4784,10 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
 		return -EOPNOTSUPP;
 
 	/* Return error if mode is not supported */
-	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
-		     FALLOC_FL_ZERO_RANGE | FALLOC_FL_COLLAPSE_RANGE |
-		     FALLOC_FL_INSERT_RANGE | FALLOC_FL_WRITE_ZEROES))
+	if (mode & ~(FALLOC_FL_ALLOCATE_RANGE | FALLOC_FL_KEEP_SIZE |
+		     FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
+		     FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE |
+		     FALLOC_FL_WRITE_ZEROES))
 		return -EOPNOTSUPP;
 
 	inode_lock(inode);
-- 
2.43.5