From: Darrick J. Wong <djwong@kernel.org>
Date: Wed, 22 Dec 2021 22:19:18 +0000 (-0800)
Subject: xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2af625c89bf4a41c8a0bc818d8cf30a291f216ca;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate

commit 983d8e60f50806f90534cc5373d0ce867e5aaf79 upstream.

The old ALLOCSP/FREESP ioctls in XFS can be used to preallocate space at
the end of files, just like fallocate and RESVSP.  Make the behavior
consistent with the other ioctls.

Reported-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 79a9a0def7db..5b2b223f9285 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -715,7 +715,8 @@ xfs_ioc_space(
 		flags |= XFS_PREALLOC_CLEAR;
 		if (bf->l_start > XFS_ISIZE(ip)) {
 			error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
-					bf->l_start - XFS_ISIZE(ip), 0);
+					bf->l_start - XFS_ISIZE(ip),
+					XFS_BMAPI_PREALLOC);
 			if (error)
 				goto out_unlock;
 		}